/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-ink: #16181D;
            --color-graphite: #23262D;
            --color-mist: #F5F3EE;
            --color-paper: #FFFFFF;
            --color-brass: #B08D57;
            --color-brass-bright: #C9A87C;
            --color-circuit: #3F7E6E;
            --color-body-text: #3D3F45;
            --color-muted-text: #7A7A72;
            --color-line-light: #E3E0D8;
            --color-line-dark: #2E3138;
            --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --shadow-card: 0 12px 32px rgba(22, 24, 29, 0.08);
            --transition: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--color-mist);
            color: var(--color-body-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }
        input, textarea {
            font-family: inherit;
        }
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--color-brass);
            outline-offset: 2px;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            background: var(--color-brass);
            color: #16181D;
            font-size: 15px;
            font-weight: 600;
            border-radius: 4px;
            border: 1px solid var(--color-brass);
            transition: all var(--transition);
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            background: var(--color-brass-bright);
            border-color: var(--color-brass-bright);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(176, 141, 87, 0.25);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 13px 30px;
            background: transparent;
            color: var(--color-mist);
            font-size: 15px;
            font-weight: 500;
            border-radius: 4px;
            border: 1px solid rgba(245, 243, 238, 0.5);
            transition: all var(--transition);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--color-mist);
            transform: translateY(-2px);
        }
        .btn-primary-lg {
            padding: 16px 44px;
            font-size: 16px;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 40px;
            background: transparent;
            color: var(--color-mist);
            font-size: 16px;
            font-weight: 500;
            border-radius: 4px;
            border: 1px solid rgba(245, 243, 238, 0.4);
            transition: all var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(245, 243, 238, 0.08);
            border-color: var(--color-mist);
            transform: translateY(-2px);
        }

        /* ===== 导航头部 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            z-index: 1000;
            background: transparent;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(22, 24, 29, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--color-paper);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .logo-mark {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: rgba(245, 243, 238, 0.72);
            padding: 6px 0;
            transition: color var(--transition);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--color-brass);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }
        .nav-link:hover {
            color: var(--color-brass-bright);
        }
        .nav-link.active {
            color: var(--color-paper);
        }
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .search-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: rgba(245, 243, 238, 0.7);
            transition: all var(--transition);
        }
        .search-btn:hover {
            color: var(--color-brass);
            transform: rotate(6deg);
        }
        .search-btn svg {
            width: 18px;
            height: 18px;
        }
        .btn-cta-header {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            border: 1px solid var(--color-brass);
            color: var(--color-brass);
            font-size: 13px;
            font-weight: 600;
            border-radius: 4px;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-cta-header:hover {
            background: var(--color-brass);
            color: #16181D;
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-mist);
            transition: all 0.3s ease;
            border-radius: 1px;
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* 移动端抽屉 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-ink);
            z-index: 999;
            padding: 48px 32px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 24px;
            font-weight: 600;
            color: rgba(245, 243, 238, 0.85);
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color var(--transition);
        }
        .mobile-menu a:hover {
            color: var(--color-brass);
        }
        .mobile-menu .btn-primary {
            margin-top: 32px;
            width: 100%;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            min-height: 680px;
            background: var(--color-ink);
            display: flex;
            overflow: hidden;
        }
        .hero-content {
            flex: 0 0 55%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 120px 48px 80px 64px;
            position: relative;
            z-index: 2;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-brass);
            margin-bottom: 28px;
        }
        .hero-tag::before {
            content: '';
            width: 2px;
            height: 14px;
            background: var(--color-brass);
            border-radius: 1px;
        }
        .hero h1 {
            font-size: clamp(44px, 6vw, 72px);
            font-weight: 700;
            line-height: 1.15;
            color: var(--color-paper);
            margin-bottom: 24px;
            letter-spacing: -0.01em;
        }
        .hero-sub {
            font-size: 16px;
            line-height: 1.7;
            color: rgba(245, 243, 238, 0.72);
            max-width: 440px;
            margin-bottom: 40px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-visual {
            flex: 0 0 45%;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .hero-visual::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, var(--color-ink) 0%, rgba(22, 24, 29, 0.3) 100%);
            z-index: 1;
            pointer-events: none;
        }
        .hero-visual svg.circuit-svg {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 55%;
            height: 55%;
            z-index: 2;
            pointer-events: none;
            opacity: 0.7;
        }
        .hero-visual svg.radar-circle {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(1);
            width: 70%;
            height: 70%;
            z-index: 2;
            pointer-events: none;
            animation: rotate-slow 30s linear infinite;
            transform-origin: center;
        }
        @keyframes rotate-slow {
            0% { transform: translate(-50%, -50%) rotate(0deg) scale(1); }
            100% { transform: translate(-50%, -50%) rotate(360deg) scale(1); }
        }
        .hero-coord {
            position: absolute;
            bottom: 28px;
            right: 32px;
            font-size: 12px;
            color: rgba(245, 243, 238, 0.5);
            letter-spacing: 0.06em;
            z-index: 3;
            font-family: "SF Mono", "Source Code Pro", monospace;
        }
        .hero-divider {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-brass) 30%, var(--color-brass) 70%, transparent);
            z-index: 4;
        }

        /* ===== Section ===== */
        .section-heading {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 48px;
        }
        .section-num {
            font-family: "SF Mono", "Source Code Pro", monospace;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass);
            letter-spacing: 0.08em;
        }
        .section-line {
            width: 40px;
            height: 1px;
            background: var(--color-line-light);
            flex-shrink: 0;
        }
        .section-heading h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 600;
            line-height: 1.3;
            color: var(--color-body-text);
        }
        .section-heading.light .section-line {
            background: rgba(255, 255, 255, 0.14);
        }
        .section-heading.light h2 {
            color: var(--color-paper);
        }

        /* ===== 核心能力 ===== */
        .capabilities {
            background: var(--color-ink);
            padding: 100px 0 120px;
        }
        .capabilities .section-heading .section-line {
            background: var(--color-line-dark);
        }
        .capability-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border-top: 1px solid var(--color-line-dark);
            border-left: 1px solid var(--color-line-dark);
        }
        .capability-item {
            padding: 48px 40px;
            border-right: 1px solid var(--color-line-dark);
            border-bottom: 1px solid var(--color-line-dark);
            transition: background var(--transition);
            position: relative;
        }
        .capability-item:hover {
            background: var(--color-graphite);
        }
        .capability-item:hover .cap-num {
            background: var(--color-brass);
            color: #16181D;
        }
        .cap-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            font-family: "SF Mono", "Source Code Pro", monospace;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass);
            border: 1px solid var(--color-brass);
            border-radius: 2px;
            margin-bottom: 20px;
            transition: all var(--transition);
        }
        .capability-item h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-paper);
            margin-bottom: 12px;
        }
        .capability-item p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(245, 243, 238, 0.6);
            margin-bottom: 16px;
        }
        .text-link {
            font-size: 13px;
            font-weight: 500;
            color: var(--color-brass);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .text-link:hover {
            gap: 10px;
            color: var(--color-brass-bright);
        }

        /* ===== 合作价值 ===== */
        .values {
            background: var(--color-mist);
            padding: 100px 0 120px;
        }
        .value-list {
            border-top: 1px solid var(--color-line-light);
        }
        .value-row {
            display: grid;
            grid-template-columns: 48px 1fr auto auto;
            align-items: center;
            gap: 32px;
            padding: 36px 16px;
            border-bottom: 1px solid var(--color-line-light);
            transition: background var(--transition), transform var(--transition);
        }
        .value-row:hover {
            background: rgba(176, 141, 87, 0.04);
            transform: translateX(4px);
        }
        .value-icon {
            width: 40px;
            height: 40px;
            color: var(--color-brass);
        }
        .value-icon svg {
            width: 100%;
            height: 100%;
        }
        .value-info h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-body-text);
            margin-bottom: 4px;
        }
        .value-info p {
            font-size: 14px;
            color: var(--color-muted-text);
            line-height: 1.6;
        }
        .value-metric {
            font-family: "SF Mono", "Source Code Pro", monospace;
            font-size: 28px;
            font-weight: 700;
            color: var(--color-brass);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .value-arrow {
            color: var(--color-muted-text);
            font-size: 18px;
            transition: color var(--transition), transform var(--transition);
        }
        .value-row:hover .value-arrow {
            color: var(--color-brass);
            transform: translateX(4px);
        }

        /* ===== 任务进度 ===== */
        .progress-section {
            background: var(--color-ink);
            padding: 100px 0 80px;
            position: relative;
        }
        .progress-section .section-heading .section-line {
            background: var(--color-line-dark);
        }
        .progress-track {
            position: relative;
            margin-top: 40px;
        }
        .progress-line {
            position: absolute;
            top: 20px;
            left: 40px;
            right: 40px;
            height: 2px;
            background: rgba(255, 255, 255, 0.1);
            z-index: 0;
        }
        .progress-fill {
            height: 100%;
            background: var(--color-brass);
            width: 40%;
            transition: width 0.6s ease;
        }
        .progress-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .step {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            padding-top: 0;
        }
        .step-dot {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-ink);
            border: 2px solid rgba(255, 255, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            transition: border-color var(--transition);
        }
        .step.completed .step-dot {
            border-color: var(--color-circuit);
            background: var(--color-circuit);
        }
        .step.completed .step-dot svg {
            color: var(--color-paper);
        }
        .step-dot svg {
            width: 16px;
            height: 16px;
        }
        .step.current .step-dot {
            border-color: var(--color-brass);
            position: relative;
        }
        .step.current .step-dot::after {
            content: '';
            position: absolute;
            inset: -8px;
            border-radius: 50%;
            border: 1px solid rgba(176, 141, 87, 0.4);
            animation: pulse 2s ease infinite;
        }
        @keyframes pulse {
            0% { transform: scale(0.9); opacity: 1; }
            70% { transform: scale(1.3); opacity: 0; }
            100% { transform: scale(1.3); opacity: 0; }
        }
        .step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-paper);
            margin-bottom: 8px;
        }
        .step p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.55);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .step-status {
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.04em;
            padding: 4px 12px;
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .step-status.done {
            color: var(--color-circuit);
            background: rgba(63, 126, 110, 0.12);
        }
        .step-status.active {
            color: var(--color-brass);
            background: rgba(176, 141, 87, 0.1);
        }
        .step-status.pending {
            color: rgba(245, 243, 238, 0.35);
            background: rgba(255, 255, 255, 0.04);
        }
        .step-status i {
            font-style: normal;
            font-size: 10px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-ink);
            padding: 80px 0 120px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '开云';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 240px;
            font-weight: 700;
            color: rgba(245, 243, 238, 0.03);
            pointer-events: none;
            user-select: none;
            line-height: 1;
            white-space: nowrap;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-brass);
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .cta-section h2 {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 600;
            color: var(--color-paper);
            margin-bottom: 32px;
            line-height: 1.3;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 最新动态 ===== */
        .news-section {
            background: var(--color-mist);
            padding: 100px 0 120px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-card {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 24px 28px;
            background: var(--color-paper);
            border: 1px solid var(--color-line-light);
            border-radius: 6px;
            transition: all var(--transition);
        }
        .news-card:hover {
            border-color: var(--color-brass);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .news-tag {
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-brass);
            border: 1px solid rgba(176, 141, 87, 0.4);
            padding: 4px 12px;
            border-radius: 999px;
            white-space: nowrap;
        }
        .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-body-text);
            margin-bottom: 4px;
            line-height: 1.5;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .news-body p {
            font-size: 14px;
            color: var(--color-muted-text);
            line-height: 1.6;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .news-date {
            flex-shrink: 0;
            font-family: "SF Mono", "Source Code Pro", monospace;
            font-size: 13px;
            color: var(--color-muted-text);
            white-space: nowrap;
        }
        .news-arrow {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--color-line-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-brass);
            transition: all var(--transition);
        }
        .news-card:hover .news-arrow {
            background: var(--color-brass);
            color: #16181D;
            border-color: var(--color-brass);
        }
        .empty-state {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 80px 20px;
            border: 1px dashed var(--color-line-light);
            border-radius: 6px;
            background: var(--color-paper);
        }
        .empty-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-brass);
            color: #16181D;
            font-family: "Georgia", serif;
            font-style: italic;
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }
        .empty-state p {
            font-size: 15px;
            color: var(--color-muted-text);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-mist);
            padding: 40px 0 120px;
        }
        .faq-list {
            border-top: 1px solid var(--color-line-light);
        }
        .faq-item {
            border-bottom: 1px solid var(--color-line-light);
            padding: 0;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 24px 8px;
            cursor: pointer;
            user-select: none;
            transition: padding-left var(--transition);
        }
        .faq-question:hover {
            padding-left: 12px;
        }
        .faq-question span.faq-text {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-body-text);
        }
        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 1px solid var(--color-brass);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-brass);
            transition: all var(--transition);
            flex-shrink: 0;
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-brass);
            color: #16181D;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 8px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 8px 20px;
        }
        .faq-answer p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-muted-text);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-ink);
            padding: 80px 0 0;
            border-top: 1px solid var(--color-brass);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 60px;
            padding-bottom: 64px;
        }
        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-paper);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo svg {
            width: 28px;
            height: 28px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(245, 243, 238, 0.6);
            max-width: 320px;
        }
        .footer-nav h4, .footer-contact h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-paper);
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }
        .footer-nav a {
            display: block;
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            padding: 6px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-nav a:hover {
            color: var(--color-paper);
            padding-left: 6px;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            padding: 4px 0;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-line-dark);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(245, 243, 238, 0.35);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 20px;
            }
            .header-left {
                gap: 24px;
            }
            .hero-content {
                padding-left: 40px;
                padding-right: 40px;
            }
            .value-row {
                grid-template-columns: 40px 1fr auto;
                gap: 20px;
            }
            .value-arrow {
                display: none;
            }
            .footer-grid {
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .main-nav,
            .search-btn,
            .btn-cta-header {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-inner {
                padding: 0 20px;
            }
            .hero {
                flex-direction: column;
                min-height: auto;
                background-image: linear-gradient(rgba(22, 24, 29, 0.72), rgba(22, 24, 29, 0.96)), url('/assets/images/backpic/back-1.png');
                background-size: cover;
                background-position: center;
            }
            .hero-content {
                flex: 1;
                width: 100%;
                padding: 120px 20px 60px;
                justify-content: flex-end;
            }
            .hero-visual {
                display: none;
            }
            .hero h1 {
                font-size: clamp(36px, 8vw, 48px);
            }
            .hero-sub {
                font-size: 15px;
            }
            .capabilities,
            .values,
            .progress-section,
            .cta-section,
            .news-section,
            .faq-section {
                padding: 56px 0 64px;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .capability-item {
                padding: 32px 24px;
            }
            .value-row {
                grid-template-columns: 36px 1fr;
                padding: 24px 8px;
            }
            .value-metric {
                grid-column: 2;
                font-size: 22px;
            }
            .progress-steps {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .progress-line {
                display: none;
            }
            .step {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
            }
            .step-dot {
                margin-bottom: 0;
            }
            .step h3 {
                margin-bottom: 4px;
                flex: 1;
            }
            .step p {
                width: 100%;
                margin-left: 56px;
                margin-bottom: 8px;
            }
            .step-status {
                margin-left: 56px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
                padding: 0 20px;
            }
            .cta-actions .btn-primary-lg,
            .cta-actions .btn-outline-light {
                width: 100%;
            }
            .news-card {
                flex-wrap: wrap;
                padding: 20px;
                gap: 12px;
            }
            .news-tag {
                font-size: 11px;
                padding: 3px 10px;
            }
            .news-body h3 {
                font-size: 16px;
            }
            .news-date {
                font-size: 12px;
                margin-left: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 40px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-content {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero h1 {
                font-size: 34px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                text-align: center;
            }
            .section-heading {
                gap: 10px;
            }
            .section-line {
                width: 24px;
            }
            .value-row {
                gap: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }
        }

        /* ===== 动效 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
:root {
            --color-ink: #16181D;
            --color-graphite: #23262D;
            --color-mist: #F5F3EE;
            --color-paper: #FFFFFF;
            --color-brass: #B08D57;
            --color-brass-bright: #C9A87C;
            --color-circuit: #3F7E6E;
            --color-body-text: #3D3F45;
            --color-muted-text: #7A7A72;
            --color-line-light: #E3E0D8;
            --color-line-dark: #2E3138;
            --radius-card: 6px;
            --radius-btn: 4px;
            --radius-badge: 999px;
            --shadow-hover: 0 12px 32px rgba(22, 24, 29, 0.08);
            --transition: all 0.18s cubic-bezier(0.25, 0.1, 0.25, 1);
            --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        * { box-sizing: border-box; }

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-sans);
            background: var(--color-mist);
            color: var(--color-body-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            margin: 0;
        }

        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button { font-family: inherit; cursor: pointer; }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        @media (max-width: 768px) {
            .container { padding: 0 20px; }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: rgba(22, 24, 29, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(245, 243, 238, 0.06);
        }

        .header-inner {
            max-width: 1280px;
            height: 64px;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        @media (max-width: 768px) {
            .header-inner { padding: 0 20px; }
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-mist);
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo svg { flex-shrink: 0; }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-left: 24px;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: rgba(245, 243, 238, 0.7);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
            transition: var(--transition);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--color-brass);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

        .nav-link:hover { color: var(--color-brass-bright); }
        .nav-link:hover::after { transform: scaleX(1); }

        .nav-link.active { color: var(--color-mist); }
        .nav-link.active::after { transform: scaleX(1); }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }

        .search-btn {
            width: 38px;
            height: 38px;
            border: none;
            background: transparent;
            color: rgba(245, 243, 238, 0.7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .search-btn:hover { color: var(--color-brass-bright); transform: rotate(6deg); }

        .header-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 20px;
            border: 1px solid var(--color-brass);
            border-radius: var(--radius-btn);
            color: var(--color-brass-bright);
            font-size: 14px;
            font-weight: 500;
            background: transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .header-btn:hover {
            background: var(--color-brass);
            color: var(--color-ink);
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            color: var(--color-mist);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }

        .menu-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-mist);
            border-radius: 2px;
            transition: var(--transition);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            z-index: 999;
            background: var(--color-ink);
            padding: 24px 20px 32px;
            border-bottom: 1px solid rgba(176, 141, 87, 0.3);
        }

        .mobile-menu.open { display: block; }

        .mobile-menu .mobile-nav-link {
            display: block;
            padding: 14px 0;
            font-size: 17px;
            font-weight: 500;
            color: rgba(245, 243, 238, 0.8);
            border-bottom: 1px solid rgba(245, 243, 238, 0.08);
        }

        .mobile-menu .mobile-nav-link.active { color: var(--color-brass); }
        .mobile-menu .mobile-nav-link:last-child { border-bottom: none; }

        .mobile-menu .header-btn { margin-top: 20px; width: 100%; }

        @media (max-width: 1024px) {
            .main-nav { gap: 18px; margin-left: 12px; }
            .nav-link { font-size: 13px; }
        }

        @media (max-width: 768px) {
            .main-nav { display: none; }
            .header-btn { display: none; }
            .search-btn { display: none; }
            .menu-toggle { display: flex; }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            padding-top: 64px;
            background: var(--color-mist);
            border-bottom: 1px solid var(--color-line-light);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-muted-text);
            padding: 20px 0 0;
        }

        .breadcrumb a { color: var(--color-muted-text); }
        .breadcrumb a:hover { color: var(--color-brass); }
        .breadcrumb .sep { color: rgba(122, 122, 114, 0.5); }
        .breadcrumb .current { color: var(--color-ink); }

        /* ===== 文章头部 ===== */
        .article-header {
            background: var(--color-mist);
            padding: 48px 0 56px;
        }

        .article-header .container { max-width: 960px; }

        .article-title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-ink);
            margin: 16px 0 16px;
            letter-spacing: 0.01em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--color-muted-text);
            margin-bottom: 24px;
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-divider {
            width: 1px;
            height: 12px;
            background: var(--color-brass);
        }

        .title-line {
            width: 40px;
            height: 1px;
            background: var(--color-brass);
        }

        /* ===== 正文 ===== */
        .article-body {
            background: var(--color-paper);
            padding: 64px 0 72px;
        }

        .article-body .container { max-width: 960px; }

        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-body-text);
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2,
        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-ink);
            margin-top: 2em;
            margin-bottom: 1em;
            line-height: 1.4;
        }

        .article-content ul {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5em;
        }

        .article-content ul li {
            padding-left: 1.5em;
            position: relative;
            margin-bottom: 0.7em;
        }

        .article-content ul li::before {
            content: "▪";
            position: absolute;
            left: 0;
            top: 0;
            font-size: 12px;
            color: var(--color-brass);
        }

        .article-content blockquote {
            border-left: 3px solid var(--color-brass);
            padding: 16px 24px;
            background: var(--color-mist);
            border-radius: 0 4px 4px 0;
            margin: 1.5em 0;
            font-size: 15px;
            color: var(--color-graphite);
        }

        .article-content img {
            border-radius: 4px;
            max-width: 100%;
            height: auto;
            margin: 1.5em auto;
        }

        .article-content figure {
            margin: 1.5em 0;
        }

        .article-content figcaption {
            font-size: 12px;
            text-align: center;
            color: var(--color-muted-text);
            margin-top: 8px;
        }

        .not-found {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 80px 0;
        }

        .not-found .icon-circle {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: rgba(176, 141, 87, 0.12);
            border: 1px solid rgba(176, 141, 87, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 32px;
            color: var(--color-brass);
        }

        .not-found h2 {
            font-size: 24px;
            font-weight: 600;
            color: var(--color-ink);
            margin-bottom: 12px;
        }

        .not-found p {
            font-size: 15px;
            color: var(--color-muted-text);
            margin-bottom: 24px;
        }

        .not-found .back-home {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            border: 1px solid var(--color-brass);
            border-radius: var(--radius-btn);
            color: var(--color-brass);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .not-found .back-home:hover {
            background: var(--color-brass);
            color: var(--color-ink);
        }

        /* ===== 标签 ===== */
        .tag-list {
            max-width: 720px;
            margin: 40px auto 0;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-block;
            padding: 5px 14px;
            border: 1px solid rgba(176, 141, 87, 0.5);
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--color-brass);
            background: transparent;
            transition: var(--transition);
        }

        .tag:hover {
            background: rgba(176, 141, 87, 0.08);
            border-color: var(--color-brass);
        }

        /* ===== 上下篇 ===== */
        .post-nav {
            max-width: 720px;
            margin: 48px auto 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--color-line-light);
        }

        .post-nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-body-text);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }

        .post-nav-link:hover { color: var(--color-brass); }

        .post-nav-link.prev:hover svg { transform: translateX(-4px); }
        .post-nav-link.next:hover svg { transform: translateX(4px); }

        /* ===== 相关推荐 ===== */
        .related-section {
            background: var(--color-mist);
            padding: 80px 0 88px;
        }

        .section-head {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 40px;
        }

        .section-num {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass);
            font-family: "SF Mono", "Cascadia Code", monospace;
            letter-spacing: 0.06em;
        }

        .section-line {
            width: 40px;
            height: 1px;
            background: var(--color-line-light);
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 600;
            color: var(--color-ink);
            line-height: 1.3;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 640px) {
            .related-grid { grid-template-columns: 1fr; }
        }

        .related-card {
            background: var(--color-paper);
            border: 1px solid var(--color-line-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
        }

        .related-card:hover {
            border-color: var(--color-brass);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .related-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

        .related-card:hover .related-cover img { transform: scale(1.04); }

        .related-info { padding: 20px 20px 22px; }

        .related-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-ink);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .related-card:hover .related-info h3 { color: var(--color-brass); }

        .related-date {
            font-size: 12px;
            color: var(--color-muted-text);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .related-date .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--color-brass);
        }

        .back-list-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 40px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-body-text);
            transition: var(--transition);
        }

        .back-list-link:hover {
            color: var(--color-brass);
        }

        .back-list-link:hover svg { transform: translateX(-4px); }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-mist);
            padding: 80px 0 88px;
            border-top: 1px solid var(--color-line-light);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-line-light);
            padding: 24px 0;
        }

        .faq-item:first-child { border-top: 1px solid var(--color-line-light); }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-ink);
            cursor: pointer;
            user-select: none;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-brass);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-brass);
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-brass);
            color: var(--color-ink);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--color-muted-text);
            line-height: 1.7;
            padding: 16px 0 4px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-ink);
            padding: 88px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 600px;
            height: 600px;
            transform: translate(-50%, -50%);
            background: radial-gradient(circle, rgba(176, 141, 87, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-brass), transparent);
            opacity: 0.5;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-label {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-brass);
            margin-bottom: 20px;
        }

        .cta-label::before,
        .cta-label::after {
            content: "";
            width: 24px;
            height: 1px;
            background: var(--color-brass);
            opacity: 0.6;
        }

        .cta-title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 600;
            color: var(--color-mist);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-desc {
            font-size: 15px;
            color: rgba(245, 243, 238, 0.6);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 32px;
            background: var(--color-brass);
            color: var(--color-ink);
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-btn);
            transition: var(--transition);
        }

        .btn-primary:hover {
            background: var(--color-brass-bright);
            transform: translateY(-2px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 32px;
            border: 1px solid rgba(245, 243, 238, 0.3);
            color: var(--color-mist);
            font-size: 16px;
            font-weight: 500;
            background: transparent;
            border-radius: var(--radius-btn);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            border-color: var(--color-mist);
            background: rgba(245, 243, 238, 0.08);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-ink);
            border-top: 1px solid rgba(176, 141, 87, 0.4);
            padding: 72px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 36px; }
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-mist);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-mist);
            margin-bottom: 18px;
            letter-spacing: 0.04em;
        }

        .footer-nav a {
            display: block;
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            padding: 6px 0;
        }

        .footer-nav a:hover { color: var(--color-mist); }

        .footer-contact p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            padding: 6px 0;
            line-height: 1.6;
        }

        .footer-bottom {
            border-top: 1px solid rgba(245, 243, 238, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(245, 243, 238, 0.4);
        }

        @media (max-width: 520px) {
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 焦点样式 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-brass);
            outline-offset: 2px;
            border-radius: 2px;
        }

        /* ===== 文章页细节 ===== */
        .backdrop-top {
            background: var(--color-mist);
            padding-top: 64px;
        }

        .related-section .section-head { max-width: 1280px; margin-left: auto; margin-right: auto; padding: 0 32px; }

        @media (max-width: 768px) {
            .related-section .section-head { padding: 0 20px; }
        }

        .related-section .container { max-width: 1280px; }

        .related-wrapper { max-width: 1280px; margin: 0 auto; }

        .related-grid { max-width: 1280px; margin: 0 auto; }

        .back-list-row { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

        @media (max-width: 768px) {
            .back-list-row { padding: 0 20px; }
        }

        .related-grid { padding: 0 0; }

        .faq-section .container { max-width: 840px; }

        .cta-section .container { max-width: 800px; }

/* roulang page: category1 */
:root {
            --color-ink: #16181D;
            --color-graphite: #23262D;
            --color-mist: #F5F3EE;
            --color-paper: #FFFFFF;
            --color-brass: #B08D57;
            --color-brass-bright: #C9A87C;
            --color-circuit: #3F7E6E;
            --color-body-text: #3D3F45;
            --color-muted-text: #7A7A72;
            --color-line-light: #E3E0D8;
            --color-line-dark: #2E3138;
            --radius-card: 6px;
            --radius-btn: 4px;
            --transition: 0.18s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-body-text);
            background: var(--color-mist);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-brass);
            outline-offset: 2px;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
        }

        section[id] {
            scroll-margin-top: 80px;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 64px;
            z-index: 100;
            background: rgba(22, 24, 29, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(176, 141, 87, 0.18);
            transition: box-shadow 0.2s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
        }

        .header-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 40px;
            min-width: 0;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #F5F3EE;
            white-space: nowrap;
            transition: color 0.18s ease;
        }

        .site-logo:hover {
            color: var(--color-brass-bright);
        }

        .site-logo svg {
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            display: inline-block;
            font-size: 14px;
            font-weight: 500;
            color: rgba(245, 243, 238, 0.72);
            position: relative;
            padding: 6px 2px;
            transition: color 0.18s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--color-brass-bright);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--color-brass);
            transition: width 0.18s ease;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-link.active {
            color: #F5F3EE;
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .search-btn {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: none;
            color: rgba(245, 243, 238, 0.75);
            border-radius: 50%;
            cursor: pointer;
            transition: color 0.18s ease, transform 0.18s ease;
        }

        .search-btn:hover {
            color: var(--color-brass-bright);
            transform: rotate(6deg);
        }

        .btn-nav {
            padding: 8px 18px;
            font-size: 14px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .hamburger span {
            width: 22px;
            height: 2px;
            background: #F5F3EE;
            transition: transform 0.2s ease, opacity 0.2s ease;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: 0;
            width: min(340px, 85vw);
            height: 100vh;
            background: var(--color-ink);
            padding: 96px 32px 32px;
            transform: translateX(100%);
            transition: transform 0.25s ease;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 8px;
            border-left: 1px solid var(--color-line-dark);
            overflow-y: auto;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .mobile-nav-link {
            font-size: 18px;
            font-weight: 600;
            color: rgba(245, 243, 238, 0.85);
            padding: 14px 0;
            border-bottom: 1px solid var(--color-line-dark);
            transition: color 0.18s ease;
            display: block;
        }

        .mobile-nav-link:hover {
            color: var(--color-brass-bright);
        }

        .mobile-nav-link.active {
            color: var(--color-brass);
        }

        .mobile-cta {
            margin-top: 24px;
            width: 100%;
            justify-content: center;
        }

        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .btn-nav {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .search-btn {
                display: none;
            }
            .header-inner {
                gap: 16px;
            }
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-brass {
            background: var(--color-brass);
            color: var(--color-ink);
            border-color: var(--color-brass);
        }

        .btn-brass:hover {
            background: var(--color-brass-bright);
            border-color: var(--color-brass-bright);
            transform: translateY(-2px);
        }

        .btn-brass:active {
            transform: translateY(0);
        }

        .btn-ghost-brass {
            background: transparent;
            color: var(--color-brass);
            border-color: rgba(176, 141, 87, 0.6);
        }

        .btn-ghost-brass:hover {
            background: var(--color-brass);
            color: var(--color-ink);
            border-color: var(--color-brass);
        }

        .btn-outline {
            background: transparent;
            color: #F5F3EE;
            border-color: rgba(245, 243, 238, 0.5);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #F5F3EE;
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--color-ink);
            border-color: rgba(22, 24, 29, 0.35);
        }

        .btn-outline-dark:hover {
            border-color: var(--color-ink);
            background: rgba(22, 24, 29, 0.04);
        }

        /* Hero */
        .category-hero {
            padding: 140px 0 80px;
            background: var(--color-mist);
            border-bottom: 1px solid var(--color-line-light);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 64px;
            align-items: center;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-muted-text);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-muted-text);
            transition: color 0.18s ease;
        }

        .breadcrumb a:hover {
            color: var(--color-brass);
        }

        .breadcrumb-sep {
            color: #C0BDB4;
        }

        .breadcrumb .current {
            color: var(--color-ink);
            font-weight: 500;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-brass);
            margin-bottom: 20px;
        }

        .hero-tag::before {
            content: "";
            width: 2px;
            height: 14px;
            background: var(--color-brass);
            flex-shrink: 0;
        }

        .category-hero h1 {
            font-size: clamp(40px, 5vw, 56px);
            font-weight: 700;
            line-height: 1.15;
            color: var(--color-ink);
            margin: 0 0 24px;
        }

        .hero-intro {
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-body-text);
            max-width: 560px;
            margin: 0 0 36px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            gap: 0;
            margin-top: 44px;
            border-top: 1px solid var(--color-line-light);
            padding-top: 24px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            padding-right: 40px;
            margin-right: 40px;
            border-right: 1px solid var(--color-line-light);
        }

        .hero-stat:last-child {
            border-right: none;
            margin-right: 0;
            padding-right: 0;
        }

        .stat-num {
            font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
            font-size: 24px;
            font-weight: 600;
            color: var(--color-ink);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 13px;
            color: var(--color-muted-text);
        }

        .hero-image {
            position: relative;
        }

        .hero-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-line-light);
        }

        .hero-image::after {
            content: "";
            position: absolute;
            right: -16px;
            bottom: -16px;
            width: 100%;
            height: 100%;
            border: 1px solid var(--color-brass);
            border-radius: var(--radius-card);
            z-index: -1;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 112px 0 56px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-image img {
                height: 240px;
            }
            .hero-stats {
                gap: 16px 32px;
            }
            .hero-stat {
                padding-right: 24px;
                margin-right: 24px;
            }
        }

        /* Section Heading */
        .section-heading {
            margin-bottom: 48px;
        }

        .section-title {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 600;
            line-height: 1.3;
            color: var(--color-ink);
            margin: 0 0 12px;
        }

        .section-num {
            font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass);
            letter-spacing: 0.08em;
            white-space: nowrap;
        }

        .section-line {
            width: 40px;
            height: 1px;
            background: var(--color-brass);
            flex-shrink: 0;
        }

        .section-sub {
            font-size: 15px;
            color: var(--color-muted-text);
            margin: 0;
            max-width: 640px;
        }

        .section-heading.light .section-title {
            color: #F5F3EE;
        }

        .section-heading.light .section-sub {
            color: rgba(245, 243, 238, 0.55);
        }

        /* Timeline */
        .timeline-section {
            background: var(--color-ink);
            color: rgba(245, 243, 238, 0.85);
            padding: 100px 0;
        }

        .timeline {
            position: relative;
            padding: 0;
            list-style: none;
            max-width: 960px;
            margin: 0 auto;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-line-dark);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            width: 50%;
            padding-right: 56px;
            padding-bottom: 56px;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            padding-right: 0;
            padding-left: 56px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-node {
            position: absolute;
            top: 4px;
            right: -8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--color-brass);
            border: 3px solid var(--color-ink);
            box-shadow: 0 0 0 2px var(--color-brass);
        }

        .timeline-item:nth-child(even) .timeline-node {
            right: auto;
            left: -8px;
        }

        .timeline-card {
            background: var(--color-graphite);
            border: 1px solid var(--color-line-dark);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            transition: border-color 0.18s ease, transform 0.18s ease;
        }

        .timeline-card:hover {
            border-color: var(--color-brass);
            transform: translateY(-3px);
        }

        .timeline-day {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-brass-bright);
            margin-bottom: 8px;
            font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
        }

        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #F5F3EE;
            margin: 0 0 10px;
        }

        .timeline-card p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(245, 243, 238, 0.62);
            margin: 0;
        }

        @media (max-width: 768px) {
            .timeline-section {
                padding: 64px 0;
            }
            .timeline::before {
                left: 8px;
            }
            .timeline-item,
            .timeline-item:nth-child(even) {
                width: 100%;
                left: 0;
                padding: 0 0 40px 40px;
            }
            .timeline-node,
            .timeline-item:nth-child(even) .timeline-node {
                left: 0;
                right: auto;
                top: 2px;
            }
            .timeline-card {
                padding: 20px 24px;
            }
        }

        /* Capability */
        .capability-section {
            background: var(--color-mist);
            padding: 100px 0;
        }

        .capability-list {
            border-top: 1px solid var(--color-line-light);
        }

        .capability-item {
            display: grid;
            grid-template-columns: 64px 240px 1fr;
            gap: 24px;
            align-items: baseline;
            padding: 32px 0;
            border-bottom: 1px solid var(--color-line-light);
            transition: background 0.18s ease, padding-left 0.18s ease;
        }

        .capability-item:hover {
            background: rgba(176, 141, 87, 0.06);
            padding-left: 16px;
        }

        .capability-num {
            font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
            font-size: 14px;
            color: var(--color-brass);
            font-weight: 600;
            letter-spacing: 0.08em;
        }

        .capability-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-ink);
        }

        .capability-desc {
            font-size: 15px;
            color: var(--color-muted-text);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .capability-section {
                padding: 64px 0;
            }
            .capability-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 24px 0;
            }
            .capability-num {
                font-size: 12px;
            }
            .capability-desc {
                font-size: 14px;
            }
        }

        /* Quality */
        .quality-section {
            background: var(--color-paper);
            padding: 100px 0;
            border-top: 1px solid var(--color-line-light);
            border-bottom: 1px solid var(--color-line-light);
        }

        .quality-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .quality-content .section-title {
            margin-bottom: 12px;
        }

        .quality-text {
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-body-text);
            margin: 0 0 24px;
        }

        .quality-points {
            display: flex;
            flex-direction: column;
            gap: 16px;
            padding: 0;
            list-style: none;
            margin: 0;
        }

        .quality-point {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--color-body-text);
        }

        .quality-point::before {
            content: "";
            width: 8px;
            height: 8px;
            background: var(--color-brass);
            flex-shrink: 0;
            margin-top: 10px;
        }

        .quality-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        @media (max-width: 768px) {
            .quality-section {
                padding: 64px 0;
            }
            .quality-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .quality-image img {
                height: 240px;
            }
        }

        /* CTA Form */
        .cta-section {
            background: var(--color-ink);
            color: #F5F3EE;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "精密";
            position: absolute;
            right: -20px;
            bottom: -40px;
            font-size: 200px;
            font-weight: 700;
            color: rgba(245, 243, 238, 0.04);
            line-height: 1;
            pointer-events: none;
            white-space: nowrap;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(rgba(176, 141, 87, 0.06) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 600;
            line-height: 1.3;
            color: #F5F3EE;
            margin: 0 0 16px;
        }

        .cta-content p {
            font-size: 15px;
            line-height: 1.75;
            color: rgba(245, 243, 238, 0.65);
            margin: 0 0 28px;
        }

        .cta-points {
            display: flex;
            flex-direction: column;
            gap: 12px;
            list-style: none;
            padding: 0;
            margin: 0 0 32px;
        }

        .cta-point {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(245, 243, 238, 0.8);
        }

        .cta-point .check {
            color: var(--color-circuit);
            font-weight: 700;
        }

        .contact-form {
            background: var(--color-graphite);
            border: 1px solid var(--color-line-dark);
            border-radius: var(--radius-card);
            padding: 40px;
        }

        .form-row {
            margin-bottom: 24px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            color: rgba(245, 243, 238, 0.65);
            margin-bottom: 6px;
        }

        .form-input,
        .form-select,
        .form-textarea {
            width: 100%;
            height: 44px;
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--color-line-dark);
            color: #F5F3EE;
            font-size: 15px;
            padding: 8px 0;
            transition: border-color 0.2s ease;
            outline: none;
            border-radius: 0;
            font-family: inherit;
        }

        .form-input:focus,
        .form-select:focus,
        .form-textarea:focus {
            border-color: var(--color-brass);
        }

        .form-input::placeholder,
        .form-textarea::placeholder {
            color: rgba(245, 243, 238, 0.35);
        }

        .form-textarea {
            height: 80px;
            resize: vertical;
        }

        .form-select {
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23B08D57' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 8px center;
            padding-right: 32px;
        }

        .form-select option {
            background: var(--color-graphite);
            color: #F5F3EE;
        }

        .btn-submit {
            width: 100%;
            height: 48px;
            background: var(--color-brass);
            color: var(--color-ink);
            border: none;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            font-family: inherit;
        }

        .btn-submit:hover {
            background: var(--color-brass-bright);
            transform: translateY(-2px);
        }

        .btn-submit:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .form-hint {
            margin-top: 16px;
            font-size: 13px;
            color: rgba(245, 243, 238, 0.4);
            text-align: center;
        }

        .cta-footer-link {
            margin-top: 48px;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: rgba(245, 243, 238, 0.7);
            transition: color var(--transition), transform var(--transition);
        }

        .back-home:hover {
            color: var(--color-brass-bright);
            transform: translateX(-4px);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 64px 0;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .contact-form {
                padding: 24px;
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--color-mist);
            padding: 100px 0;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            border-top: 1px solid var(--color-line-light);
        }

        .faq-item {
            border-bottom: 1px solid var(--color-line-light);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 24px 0;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-ink);
            transition: color 0.18s ease;
            font-family: inherit;
        }

        .faq-question:hover {
            color: var(--color-brass);
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid var(--color-brass);
            color: var(--color-brass);
            font-size: 18px;
            font-weight: 400;
            line-height: 1;
            transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-brass);
            color: #F5F3EE;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease;
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-muted-text);
        }

        .faq-item.open .faq-answer {
            max-height: 320px;
            padding-bottom: 24px;
        }

        .faq-answer p {
            margin: 0;
        }

        @media (max-width: 768px) {
            .faq-section {
                padding: 64px 0;
            }
            .faq-question {
                font-size: 15px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--color-ink);
            color: rgba(245, 243, 238, 0.6);
            border-top: 1px solid var(--color-brass);
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #F5F3EE;
            margin-bottom: 16px;
            transition: color 0.18s ease;
        }

        .footer-logo:hover {
            color: var(--color-brass-bright);
        }

        .footer-logo svg {
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(245, 243, 238, 0.6);
            margin: 0;
            max-width: 360px;
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 14px;
            font-weight: 600;
            color: #F5F3EE;
            margin: 0 0 16px;
        }

        .footer-nav a {
            display: block;
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            padding: 6px 0;
            transition: color 0.18s ease;
        }

        .footer-nav a:hover {
            color: #F5F3EE;
        }

        .footer-contact p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.6);
            margin: 0 0 8px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid var(--color-line-dark);
            padding-top: 24px;
            font-size: 13px;
            color: rgba(245, 243, 238, 0.4);
        }

        .footer-bottom p {
            margin: 0;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
            }
        }

        /* Reveal */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.5s ease, transform 0.5s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category2 */
:root {
            --color-ink: #16181D;
            --color-graphite: #23262D;
            --color-mist: #F5F3EE;
            --color-paper: #FFFFFF;
            --color-brass: #B08D57;
            --color-brass-bright: #C9A87C;
            --color-circuit: #3F7E6E;
            --color-body-text: #3D3F45;
            --color-muted-text: #7A7A72;
            --color-line-light: #E3E0D8;
            --color-line-dark: #2E3138;
            --radius-card: 6px;
            --radius-btn: 4px;
            --radius-badge: 999px;
            --shadow-hover: 0 12px 32px rgba(22, 24, 29, 0.08);
            --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            color: var(--color-body-text);
            background: var(--color-mist);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s var(--ease);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-brass);
            outline-offset: 2px;
            border-radius: 2px;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (min-width:768px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 64px;
            display: flex;
            align-items: center;
            background: transparent;
            transition: background .25s var(--ease), box-shadow .25s var(--ease);
        }
        .site-header.scrolled {
            background: rgba(22, 24, 29, 0.92);
            box-shadow: 0 1px 0 rgba(176, 141, 87, 0.2);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #F5F3EE;
            white-space: nowrap;
            letter-spacing: .02em;
        }
        .brand-logo svg {
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: 32px;
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: rgba(245, 243, 238, 0.78);
            padding: 6px 14px;
            border-radius: 4px;
            position: relative;
            transition: color .2s var(--ease), background .2s var(--ease);
        }
        .nav-link:hover {
            color: var(--color-brass-bright);
        }
        .nav-link.active {
            color: #F5F3EE;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 2px;
            background: var(--color-brass);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(245, 243, 238, 0.8);
            transition: color .2s var(--ease), transform .2s var(--ease);
        }
        .nav-search:hover {
            color: var(--color-brass-bright);
            transform: rotate(6deg);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 20px;
            border: 1px solid var(--color-brass);
            color: var(--color-brass);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            letter-spacing: .06em;
            transition: all .2s var(--ease);
        }
        .nav-cta:hover {
            background: var(--color-brass);
            color: var(--color-ink);
        }
        .burger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
        }
        .burger span {
            display: block;
            width: 22px;
            height: 2px;
            background: #F5F3EE;
            border-radius: 2px;
            transition: all .25s var(--ease);
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-ink);
            z-index: 99;
            padding: 90px 32px 40px;
            display: flex;
            flex-direction: column;
            opacity: 0;
            visibility: hidden;
            transition: opacity .25s var(--ease), visibility .25s var(--ease);
        }
        .mobile-drawer.open {
            opacity: 1;
            visibility: visible;
        }
        .mobile-drawer a {
            font-size: 22px;
            font-weight: 600;
            color: rgba(245, 243, 238, 0.85);
            padding: 14px 0;
            border-bottom: 1px solid rgba(245, 243, 238, 0.08);
        }
        .mobile-drawer a.active {
            color: var(--color-brass-bright);
        }
        .mobile-drawer .drawer-cta {
            margin-top: auto;
            background: var(--color-brass);
            color: var(--color-ink);
            text-align: center;
            border-radius: 4px;
            padding: 14px;
            font-size: 16px;
            font-weight: 600;
            border: none;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 680px;
            height: calc(100vh - 0px);
            background: var(--color-ink);
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background-size: cover;
            background-position: center;
            z-index: 0;
            clip-path: polygon(12% 0, 100% 0, 100% 100%, 0 100%);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(90deg, rgba(22, 24, 29, 0.94) 0%, rgba(22, 24, 29, 0.72) 45%, rgba(22, 24, 29, 0.28) 100%);
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-top: 64px;
        }
        .hero-content {
            max-width: 640px;
            padding: 60px 0;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .08em;
            color: var(--color-brass-bright);
            margin-bottom: 28px;
        }
        .hero-tag::before {
            content: "";
            width: 2px;
            height: 14px;
            background: var(--color-brass);
        }
        .hero-title {
            font-size: clamp(44px, 6vw, 72px);
            font-weight: 700;
            line-height: 1.15;
            color: #F5F3EE;
            margin-bottom: 24px;
            letter-spacing: .01em;
        }
        .hero-title .brand-mark {
            color: var(--color-brass-bright);
        }
        .hero-sub {
            font-size: 16px;
            line-height: 1.7;
            color: rgba(245, 243, 238, 0.72);
            max-width: 520px;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all .2s var(--ease);
            letter-spacing: .03em;
        }
        .btn-primary {
            background: var(--color-brass);
            color: var(--color-ink);
        }
        .btn-primary:hover {
            background: var(--color-brass-bright);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            border: 1px solid rgba(245, 243, 238, 0.65);
            color: #F5F3EE;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #F5F3EE;
        }
        .hero-coord {
            position: absolute;
            right: 20px;
            bottom: 100px;
            z-index: 3;
            font-size: 12px;
            letter-spacing: .08em;
            color: rgba(245, 243, 238, 0.45);
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            writing-mode: horizontal-tb;
        }
        .hero-stats {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 3;
            background: rgba(22, 24, 29, 0.72);
            border-top: 1px solid rgba(176, 141, 87, 0.25);
            backdrop-filter: blur(6px);
        }
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            padding: 22px 0;
        }
        .stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 0 20px;
            border-right: 1px solid rgba(245, 243, 238, 0.08);
        }
        .stat-item:first-child {
            padding-left: 0;
        }
        .stat-item:last-child {
            border-right: none;
        }
        .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: #F5F3EE;
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 12px;
            color: rgba(245, 243, 238, 0.55);
            letter-spacing: .04em;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 100px 0;
        }
        .section-light {
            background: var(--color-mist);
        }
        .section-dark {
            background: var(--color-ink);
        }
        .section-heading {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 56px;
        }
        .section-seq {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass);
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            letter-spacing: .06em;
        }
        .section-line {
            width: 40px;
            height: 1px;
            background: var(--color-line-light);
            flex-shrink: 0;
        }
        .section-dark .section-line {
            background: var(--color-line-dark);
        }
        .section-title {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 600;
            color: var(--color-ink);
            line-height: 1.3;
        }
        .section-dark .section-title {
            color: #F5F3EE;
        }
        .section-more {
            margin-left: auto;
            font-size: 14px;
            color: var(--color-brass);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .section-more:hover {
            color: var(--color-brass-bright);
        }

        /* ===== Capability 2x2 ===== */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            border-top: 1px solid var(--color-line-light);
            border-left: 1px solid var(--color-line-light);
        }
        .capability-cell {
            padding: 40px 32px;
            border-right: 1px solid var(--color-line-light);
            border-bottom: 1px solid var(--color-line-light);
            background: transparent;
            transition: background .2s var(--ease);
            position: relative;
        }
        .capability-cell:hover {
            background: #F0EDE6;
        }
        .cell-num {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass);
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            display: inline-flex;
            width: 32px;
            height: 32px;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
            margin-bottom: 20px;
            transition: all .2s var(--ease);
        }
        .capability-cell:hover .cell-num {
            background: var(--color-brass);
            color: #F5F3EE;
        }
        .cell-title {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-ink);
            margin-bottom: 10px;
        }
        .cell-desc {
            font-size: 14px;
            color: var(--color-muted-text);
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 360px;
        }
        .cell-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-brass);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s var(--ease);
        }
        .cell-link:hover {
            gap: 8px;
            color: var(--color-brass-bright);
        }

        /* ===== Scenario (dark) ===== */
        .scenario-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 96px;
        }
        .scenario-block:last-child {
            margin-bottom: 0;
        }
        .scenario-block.flip .scenario-media {
            order: 2;
        }
        .scenario-block.flip .scenario-text {
            order: 1;
        }
        .scenario-media {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
        }
        .scenario-media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            border-radius: var(--radius-card);
            transition: transform .4s var(--ease);
        }
        .scenario-media:hover img {
            transform: scale(1.02);
        }
        .scenario-media::after {
            content: "";
            position: absolute;
            inset: 0;
            border: 1px solid rgba(176, 141, 87, 0.35);
            border-radius: var(--radius-card);
            pointer-events: none;
        }
        .scenario-index {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-brass-bright);
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            letter-spacing: .06em;
            display: block;
            margin-bottom: 12px;
        }
        .scenario-text h3 {
            font-size: 26px;
            font-weight: 600;
            color: #F5F3EE;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .scenario-text p {
            font-size: 15px;
            line-height: 1.75;
            color: rgba(245, 243, 238, 0.66);
            margin-bottom: 20px;
        }
        .scenario-list {
            list-style: none;
        }
        .scenario-list li {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.72);
            padding-left: 20px;
            position: relative;
            margin-bottom: 8px;
        }
        .scenario-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            background: var(--color-brass);
            border-radius: 1px;
        }

        /* ===== Flow ===== */
        .flow-section {
            background: var(--color-mist);
        }
        .flow-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            margin-top: 40px;
        }
        .flow-track::before {
            content: "";
            position: absolute;
            top: 19px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: var(--color-line-light);
        }
        .flow-track::after {
            content: "";
            position: absolute;
            top: 19px;
            left: 8%;
            width: 46%;
            height: 2px;
            background: var(--color-brass);
        }
        .flow-step {
            position: relative;
            text-align: center;
            padding-top: 62px;
        }
        .step-dot {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-mist);
            border: 2px solid var(--color-brass);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-brass);
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            z-index: 1;
        }
        .flow-step.done .step-dot {
            background: var(--color-brass);
            color: #F5F3EE;
        }
        .flow-step h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-ink);
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 13px;
            color: var(--color-muted-text);
            line-height: 1.65;
            max-width: 200px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-mist);
            padding-top: 0;
        }
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-line-light);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--color-line-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            cursor: pointer;
            gap: 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-ink);
            transition: color .2s var(--ease);
            width: 100%;
            text-align: left;
            background: none;
        }
        .faq-question:hover {
            color: var(--color-brass);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-brass);
            color: var(--color-brass);
            font-size: 18px;
            font-weight: 400;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform .25s var(--ease), background .2s var(--ease), color .2s var(--ease);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-brass);
            color: #F5F3EE;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s var(--ease);
        }
        .faq-answer-inner {
            padding: 0 0 24px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-muted-text);
            max-width: 760px;
        }

        /* ===== CTA + Form ===== */
        .cta-section {
            background: var(--color-ink);
            position: relative;
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }
        .cta-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(22, 24, 29, 0.9) 0%, rgba(22, 24, 29, 0.6) 100%);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .cta-text .section-title {
            color: #F5F3EE;
            margin-bottom: 20px;
        }
        .cta-text p {
            font-size: 15px;
            line-height: 1.75;
            color: rgba(245, 243, 238, 0.66);
            margin-bottom: 32px;
            max-width: 460px;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .cta-form {
            background: var(--color-graphite);
            border: 1px solid rgba(176, 141, 87, 0.3);
            border-radius: var(--radius-card);
            padding: 36px;
        }
        .form-field {
            margin-bottom: 22px;
        }
        .form-label {
            display: block;
            font-size: 13px;
            color: rgba(245, 243, 238, 0.6);
            margin-bottom: 8px;
            letter-spacing: .02em;
        }
        .form-input {
            width: 100%;
            height: 44px;
            background: transparent;
            border: none;
            border-bottom: 1px solid rgba(245, 243, 238, 0.2);
            color: #F5F3EE;
            font-size: 15px;
            padding: 0 2px;
            transition: border-color .2s var(--ease);
            border-radius: 0;
        }
        .form-input::placeholder {
            color: rgba(245, 243, 238, 0.3);
        }
        .form-input:focus {
            outline: none;
            border-bottom-color: var(--color-brass);
        }
        .form-btn {
            width: 100%;
            height: 48px;
            background: var(--color-brass);
            color: var(--color-ink);
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all .2s var(--ease);
            margin-top: 8px;
            letter-spacing: .04em;
        }
        .form-btn:hover {
            background: var(--color-brass-bright);
            transform: translateY(-2px);
        }
        .form-note {
            font-size: 12px;
            color: rgba(245, 243, 238, 0.4);
            text-align: center;
            margin-top: 14px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-ink);
            border-top: 1px solid var(--color-brass);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #F5F3EE;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.55);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-nav h4,
        .footer-contact h4 {
            font-size: 14px;
            font-weight: 600;
            color: #F5F3EE;
            margin-bottom: 16px;
            letter-spacing: .03em;
        }
        .footer-nav a {
            display: block;
            font-size: 14px;
            color: rgba(245, 243, 238, 0.55);
            margin-bottom: 10px;
            transition: color .2s var(--ease);
        }
        .footer-nav a:hover {
            color: #F5F3EE;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(245, 243, 238, 0.55);
            margin-bottom: 10px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(245, 243, 238, 0.08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(245, 243, 238, 0.4);
        }

        /* ===== Reveal Animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity .5s var(--ease), transform .5s var(--ease);
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Responsive ===== */
        @media (max-width:1024px) {
            .main-nav {
                display: none;
            }
            .nav-actions .nav-cta {
                display: none;
            }
            .burger {
                display: flex;
            }
            .hero-bg {
                width: 100%;
                clip-path: none;
                opacity: 0.35;
            }
            .hero-overlay {
                background: linear-gradient(180deg, rgba(22, 24, 29, 0.82) 0%, rgba(22, 24, 29, 0.92) 100%);
            }
            .hero {
                min-height: 640px;
            }
            .hero-content {
                max-width: 100%;
                padding-top: 100px;
                padding-bottom: 160px;
            }
            .hero-coord {
                display: none;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px 0;
            }
            .stat-item {
                border-right: none;
                padding: 8px 20px;
            }
            .scenario-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .scenario-block.flip .scenario-media,
            .scenario-block.flip .scenario-text {
                order: 0;
            }
            .flow-track {
                grid-template-columns: repeat(2, 1fr);
                gap: 48px 24px;
            }
            .flow-track::before,
            .flow-track::after {
                display: none;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width:768px) {
            .section {
                padding: 56px 0;
            }
            .section-heading {
                margin-bottom: 36px;
            }
            .capability-grid {
                grid-template-columns: 1fr;
                border-left: none;
            }
            .capability-cell {
                border-right: none;
            }
            .scenario-media img {
                height: 220px;
            }
            .stat-num {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 40px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .cta-form {
                padding: 24px;
            }
        }
        @media (max-width:520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-logo {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item {
                padding: 6px 10px;
            }
            .stat-num {
                font-size: 22px;
            }
            .flow-track {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .flow-step {
                padding-top: 56px;
            }
        }

/* roulang page: category3 */
:root {
            --color-ink: #16181D;
            --color-graphite: #23262D;
            --color-mist: #F5F3EE;
            --color-paper: #FFFFFF;
            --color-brass: #B08D57;
            --color-brass-bright: #C9A87C;
            --color-circuit: #3F7E6E;
            --color-body-text: #3D3F45;
            --color-muted-text: #7A7A72;
            --color-line-light: #E3E0D8;
            --color-line-dark: #2E3138;
            --radius-card: 6px;
            --radius-btn: 4px;
            --shadow-hover: 0 12px 32px rgba(22, 24, 29, 0.08);
            --transition: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--color-mist);
            color: var(--color-body-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-brass);
            outline-offset: 2px;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        .section {
            padding: 96px 0;
            scroll-margin-top: 90px;
        }

        .section-dark {
            background: var(--color-ink);
            color: var(--color-mist);
        }

        @media (max-width: 520px) {
            .section {
                padding: 64px 0;
            }
        }

        .section-label {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-brass);
        }

        .section-label .index {
            font-family: "Courier New", monospace;
            font-size: 14px;
            color: var(--color-brass);
        }

        .section-label::before {
            content: "";
            width: 40px;
            height: 1px;
            background: var(--color-line-light);
        }

        .section-dark .section-label::before {
            background: rgba(245, 243, 238, 0.3);
        }

        .section h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 600;
            line-height: 1.3;
            margin-top: 12px;
            color: var(--color-ink);
        }

        .section-dark h2 {
            color: var(--color-mist);
        }

        .section .lead {
            margin-top: 16px;
            max-width: 720px;
            color: var(--color-muted-text);
        }

        .section-dark .lead {
            color: rgba(245, 243, 238, 0.6);
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            z-index: 100;
            background: transparent;
            transition: background 0.2s ease, box-shadow 0.2s ease, backdrop-filter 0.2s ease;
        }

        .site-header.scrolled {
            background: rgba(22, 24, 29, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 1px 0 rgba(245, 243, 238, 0.08);
        }

        .nav-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-mist);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            gap: 28px;
            align-items: center;
        }

        .nav-link {
            position: relative;
            color: rgba(245, 243, 238, 0.8);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 0;
            transition: color var(--transition);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--color-brass);
            transition: width var(--transition);
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--color-brass-bright);
        }

        .nav-link.active::after,
        .nav-link:hover::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: none;
            background: transparent;
            color: rgba(245, 243, 238, 0.8);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: transform var(--transition), color var(--transition);
        }

        .search-btn:hover {
            color: var(--color-brass-bright);
            transform: rotate(6deg);
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border: none;
            background: transparent;
            color: var(--color-mist);
        }

        /* ===== Button ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid transparent;
            transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .btn-outline-brass {
            border-color: var(--color-brass);
            color: var(--color-brass);
            background: transparent;
        }

        .btn-outline-brass:hover {
            background: var(--color-brass);
            color: var(--color-ink);
        }

        .btn-primary {
            background: var(--color-brass);
            color: #fff;
            border-color: var(--color-brass);
        }

        .btn-primary:hover {
            background: var(--color-brass-bright);
            border-color: var(--color-brass-bright);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            border-color: rgba(245, 243, 238, 0.5);
            color: var(--color-mist);
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .btn-lg {
            height: 48px;
            padding: 0 32px;
            font-size: 16px;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: flex-end;
            padding: 140px 0 72px;
            background-size: cover;
            background-position: center;
        }

        .page-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(75deg, rgba(22, 24, 29, 0.92) 0%, rgba(22, 24, 29, 0.78) 45%, rgba(22, 24, 29, 0.38) 100%);
        }

        .page-hero-content {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(245, 243, 238, 0.55);
            margin-bottom: 20px;
        }

        .breadcrumb a:hover {
            color: var(--color-brass-bright);
        }

        .breadcrumb .current {
            color: var(--color-brass);
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--color-brass);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            margin-bottom: 16px;
        }

        .hero-eyebrow::before {
            content: "";
            width: 2px;
            height: 16px;
            background: var(--color-brass);
        }

        .page-hero h1 {
            font-size: clamp(42px, 6vw, 64px);
            line-height: 1.15;
            font-weight: 700;
            color: var(--color-mist);
            max-width: 820px;
        }

        .hero-lead {
            margin-top: 20px;
            max-width: 640px;
            color: rgba(245, 243, 238, 0.75);
            font-size: 16px;
            line-height: 1.7;
        }

        .hero-divider {
            margin-top: 28px;
            width: 40px;
            height: 2px;
            background: var(--color-brass);
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 32px;
        }

        /* ===== Split Row ===== */
        .split-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 72px;
            align-items: center;
        }

        .split-row + .split-row {
            margin-top: 112px;
        }

        .split-media {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-card);
        }

        .split-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 16 / 10;
            transition: transform 0.4s ease;
        }

        .split-media:hover img {
            transform: scale(1.02);
        }

        .split-content h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--color-ink);
            margin-top: 16px;
        }

        .split-content p {
            margin-top: 16px;
            color: var(--color-body-text);
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            border: 1px solid var(--color-brass);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-brass);
            background: transparent;
            transition: background var(--transition), color var(--transition);
        }

        .tag:hover {
            background: var(--color-brass);
            color: #fff;
        }

        /* ===== Process ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 24px;
            margin-top: 56px;
            position: relative;
        }

        .process-steps::before {
            content: "";
            position: absolute;
            top: 20px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: rgba(245, 243, 238, 0.15);
        }

        .process-step {
            position: relative;
            padding-top: 56px;
        }

        .process-node {
            position: absolute;
            top: 0;
            left: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 2px solid rgba(245, 243, 238, 0.3);
            background: var(--color-ink);
            color: rgba(245, 243, 238, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            transition: border-color var(--transition), color var(--transition);
        }

        .process-step.done .process-node {
            border-color: var(--color-circuit);
            color: var(--color-circuit);
        }

        .process-step.current .process-node {
            border-color: var(--color-brass);
            color: var(--color-brass);
            box-shadow: 0 0 0 6px rgba(176, 141, 87, 0.15);
            animation: pulse 2s ease infinite;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(176, 141, 87, 0.35);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(176, 141, 87, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(176, 141, 87, 0);
            }
        }

        .process-step h3 {
            color: var(--color-mist);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .process-step p {
            color: rgba(245, 243, 238, 0.55);
            font-size: 13px;
            line-height: 1.6;
        }

        .process-status {
            display: inline-block;
            margin-top: 12px;
            font-size: 12px;
            color: rgba(245, 243, 238, 0.4);
        }

        .process-step.done .process-status {
            color: var(--color-circuit);
        }

        .process-step.current .process-status {
            color: var(--color-brass);
        }

        /* ===== Form ===== */
        .section-form {
            background: var(--color-mist);
        }

        .form-panel {
            background: var(--color-paper);
            border: 1px solid var(--color-line-light);
            border-radius: var(--radius-card);
            padding: 40px;
            margin-top: 40px;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px 32px;
            margin-bottom: 20px;
        }

        .form-field {
            margin-bottom: 20px;
        }

        .form-grid .form-field {
            margin-bottom: 0;
        }

        .form-field label {
            display: block;
            font-size: 13px;
            color: var(--color-muted-text);
            margin-bottom: 6px;
            font-weight: 500;
        }

        .form-field input,
        .form-field select,
        .form-field textarea {
            width: 100%;
            height: 44px;
            padding: 0 14px;
            border: none;
            border-bottom: 1px solid var(--color-line-light);
            background: transparent;
            font-size: 15px;
            color: var(--color-ink);
            outline: none;
            transition: border-color var(--transition);
            font-family: inherit;
            border-radius: 0;
        }

        .form-field textarea {
            height: auto;
            padding: 12px 14px;
            resize: vertical;
        }

        .form-field input:focus,
        .form-field select:focus,
        .form-field textarea:focus {
            border-bottom-color: var(--color-brass);
        }

        .form-note {
            font-size: 12px;
            color: var(--color-muted-text);
            margin-top: 16px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            margin-top: 40px;
            border-bottom: 1px solid var(--color-line-light);
        }

        .faq-item {
            border-top: 1px solid var(--color-line-light);
            padding: 24px 0;
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-ink);
            cursor: pointer;
            transition: color var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--color-brass);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-brass);
            color: var(--color-brass);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 400;
            line-height: 1;
            flex-shrink: 0;
            transition: transform var(--transition), background var(--transition), color var(--transition);
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background: var(--color-brass);
            color: #fff;
        }

        .faq-answer {
            padding-top: 14px;
            font-size: 14px;
            color: var(--color-muted-text);
            line-height: 1.7;
            max-width: 860px;
        }

        .faq-answer p + p {
            margin-top: 8px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-ink);
            position: relative;
            overflow: hidden;
            padding: 104px 0;
            scroll-margin-top: 90px;
        }

        .cta-section::before {
            content: "开云电子";
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 180px;
            font-weight: 800;
            line-height: 1;
            color: rgba(245, 243, 238, 0.04);
            white-space: nowrap;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            text-align: center;
        }

        .cta-eyebrow {
            color: var(--color-brass);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
        }

        .cta-title {
            color: var(--color-mist);
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 600;
            line-height: 1.3;
            margin-top: 12px;
        }

        .cta-section p {
            color: rgba(245, 243, 238, 0.6);
            max-width: 600px;
            margin: 16px auto 0;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-ink);
            border-top: 1px solid var(--color-brass);
            color: rgba(245, 243, 238, 0.6);
            font-size: 14px;
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-mist);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-brand p {
            max-width: 360px;
            line-height: 1.7;
        }

        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-nav h4 {
            color: var(--color-mist);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .footer-nav a:hover {
            color: #fff;
        }

        .footer-contact p {
            margin-top: 8px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 48px;
            padding-top: 20px;
            border-top: 1px solid var(--color-line-dark);
            font-size: 13px;
            color: rgba(245, 243, 238, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .split-row {
                gap: 40px;
            }

            .process-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 32px 24px;
            }

            .process-steps::before {
                display: none;
            }

            .process-step {
                padding-top: 56px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(22, 24, 29, 0.98);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 24px 24px;
                transform: translateY(-200%);
                transition: transform 0.3s ease;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .nav-link {
                padding: 14px 0;
                border-bottom: 1px solid var(--color-line-dark);
            }

            .header-actions .btn {
                display: none;
            }

            .split-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .split-row + .split-row {
                margin-top: 64px;
            }

            .process-steps {
                grid-template-columns: 1fr;
            }

            .page-hero {
                min-height: 460px;
                padding: 120px 0 56px;
            }

            .form-grid {
                grid-template-columns: 1fr;
            }

            .form-panel {
                padding: 24px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .hero-actions .btn {
                width: 100%;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .form-panel {
                padding: 20px 16px;
            }
        }