/* roulang page: index */
:root {
            /* 色彩系统 */
            --color-primary: #0064A4;
            --color-primary-hover: #0086D6;
            --color-secondary: #34D058;
            --color-accent: #FF8C42;
            --color-bg-dark: #0D1117;
            --color-bg-card: #161B22;
            --color-bg-footer: #0A0D12;
            --color-text: rgba(255, 255, 255, 0.85);
            --color-text-light: rgba(255, 255, 255, 0.6);
            --color-border: rgba(255, 255, 255, 0.1);
            --color-glass: rgba(255, 255, 255, 0.05);
            /* 样式系统 */
            --radius: 0.75rem;
            --shadow: 0 10px 30px rgba(0, 100, 164, 0.15);
            --shadow-glow: 0 0 15px rgba(52, 208, 88, 0.5);
            --spacing-section: 5rem;
            --spacing-inner: 2rem;
            /* 字体层级 */
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --fs-h1: 2.5rem;
            --fs-h2: 1.75rem;
            --fs-h3: 1.5rem;
            --fs-h4: 1.25rem;
            --fs-body: 1rem;
            --fs-small: 0.875rem;
            --lh-body: 1.75;
        }
        /* 基础重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: var(--fs-body);
            line-height: var(--lh-body);
            color: var(--color-text);
            background-color: var(--color-bg-dark);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--color-secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            list-style: none;
        }
        /* 容器 */
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        /* 按钮样式 */
        .btn {
            display: inline-block;
            padding: 0.85rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: var(--fs-body);
            text-align: center;
            cursor: pointer;
            border: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: white;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: transparent;
            color: white;
            border: 1px solid var(--color-border);
        }
        .btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: var(--color-text-light);
            transform: translateY(-2px);
        }
        .btn-accent {
            background-color: var(--color-accent);
            color: var(--color-bg-dark);
            font-weight: 700;
        }
        .btn-accent:hover {
            background-color: #ff9e5d;
            transform: translateY(-2px);
        }
        /* 导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background-color: rgba(13, 17, 23, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: 1.5rem;
            gap: 0.75rem;
        }
        .logo-icon {
            color: var(--color-primary);
        }
        .logo-text {
            color: white;
        }
        .logo-sub {
            font-size: var(--fs-small);
            color: var(--color-text-light);
            margin-left: 0.25rem;
        }
        .nav-menu {
            display: flex;
            gap: 2.5rem;
        }
        .nav-link {
            font-weight: 500;
            color: var(--color-text-light);
            position: relative;
            padding: 0.5rem 0;
        }
        .nav-link:hover,
        .nav-link.active {
            color: white;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 1px;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .nav-cta .btn {
            padding: 0.65rem 1.5rem;
            font-size: var(--fs-small);
        }
        /* 移动端导航 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        /* Hero */
        .hero {
            min-height: 100vh;
            padding-top: 70px;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: -1;
        }
        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        .hero-text h1 {
            font-size: var(--fs-h1);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #fff 0%, #a5d8ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-text p {
            font-size: 1.125rem;
            color: var(--color-text-light);
            margin-bottom: 2.5rem;
            max-width: 90%;
        }
        .hero-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .hero-visual {
            position: relative;
        }
        .simulator-frame {
            background-color: var(--color-bg-card);
            border-radius: var(--radius);
            padding: 1.5rem;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }
        .simulator-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--color-border);
        }
        .simulator-title {
            font-weight: 600;
            color: var(--color-secondary);
        }
        .simulator-dots {
            display: flex;
            gap: 0.5rem;
        }
        .dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }
        .dot.red { background-color: #ff5f56; }
        .dot.yellow { background-color: #ffbd2e; }
        .dot.green { background-color: #27c93f; }
        .simulator-screen {
            background-color: #0a0d12;
            border-radius: calc(var(--radius) / 2);
            height: 280px;
            position: relative;
            overflow: hidden;
        }
        .code-line {
            position: absolute;
            left: 1rem;
            height: 1.2rem;
            background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
            animation: scan 3s infinite linear;
        }
        @keyframes scan {
            0% { top: 0%; opacity: 0; }
            10% { opacity: 1; }
            90% { opacity: 1; }
            100% { top: 100%; opacity: 0; }
        }
        /* 板块通用 */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: var(--fs-h2);
            font-weight: 600;
            margin-bottom: 1rem;
            color: white;
        }
        .section-title p {
            color: var(--color-text-light);
            max-width: 700px;
            margin: 0 auto;
        }
        /* 痛点区 */
        .pain-points {
            background-color: var(--color-bg-card);
        }
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }
        .pain-card {
            background: var(--color-glass);
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            padding: 2rem;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .pain-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: var(--color-primary);
        }
        .pain-icon {
            font-size: 2.5rem;
            color: var(--color-accent);
            margin-bottom: 1.5rem;
        }
        .pain-card h3 {
            font-size: var(--fs-h3);
            margin-bottom: 1rem;
            color: white;
        }
        /* 解决方案区 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .solution-card {
            background-color: var(--color-bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .solution-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: var(--color-primary);
        }
        .solution-img {
            height: 180px;
            overflow: hidden;
        }
        .solution-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .solution-card:hover .solution-img img {
            transform: scale(1.05);
        }
        .solution-content {
            padding: 2rem;
        }
        .solution-content h3 {
            font-size: var(--fs-h3);
            margin-bottom: 1rem;
            color: white;
        }
        .solution-content p {
            color: var(--color-text-light);
            margin-bottom: 1.5rem;
        }
        .solution-features {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .feature-tag {
            background-color: rgba(0, 100, 164, 0.2);
            color: #a5d8ff;
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: var(--fs-small);
            border: 1px solid rgba(0, 100, 164, 0.4);
        }
        /* 成果区 */
        .results {
            background-color: var(--color-bg-card);
        }
        .results-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 2rem;
            text-align: center;
        }
        .stat-item {
            padding: 2rem;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-desc {
            color: var(--color-text-light);
            font-size: var(--fs-small);
        }
        /* 证言区 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
        }
        .testimonial-card {
            background: var(--color-glass);
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            padding: 2rem;
            position: relative;
        }
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 1rem;
            left: 1.5rem;
            font-size: 4rem;
            color: var(--color-primary);
            opacity: 0.3;
            font-family: serif;
            line-height: 1;
        }
        .testimonial-text {
            font-style: italic;
            margin-bottom: 1.5rem;
            color: var(--color-text);
            position: relative;
            z-index: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--color-bg-card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--color-primary);
            border: 2px solid var(--color-border        }
        .author-info h4 {
            font-size: var(--fs-h4);
            color: white;
            margin-bottom: 0.25rem;
        }
        .author-info p {
            color: var(--color-text-light);
            font-size: var(--fs-small);
        }
        /* 最终CTA区 */
        .final-cta {
            text-align: center;
            background: linear-gradient(135deg, var(--color-bg-card) 0%, #1a2332 100%);
            border-radius: var(--radius);
            padding: 4rem 2rem;
            margin: 4rem auto;
            max-width: 900px;
            border: 1px solid var(--color-border);
        }
        .final-cta h2 {
            font-size: var(--fs-h2);
            margin-bottom: 1.5rem;
            color: white;
        }
        .final-cta p {
            color: var(--color-text-light);
            margin-bottom: 2.5rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        /* 页脚 */
        footer {
            background-color: var(--color-bg-footer);
            padding: var(--spacing-section) 0 2rem;
            border-top: 1px solid var(--color-border);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-brand .logo {
            margin-bottom: 1.5rem;
            justify-content: flex-start;
        }
        .footer-desc {
            color: var(--color-text-light);
            font-size: var(--fs-small);
        }
        .footer-links h3,
        .footer-contact h3 {
            font-size: var(--fs-h4);
            color: white;
            margin-bottom: 1.5rem;
        }
        .footer-links ul li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: var(--color-text-light);
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }
        .footer-contact p {
            color: var(--color-text-light);
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .footer-contact i {
            color: var(--color-primary);
            width: 20px;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid var(--color-border);
            color: var(--color-text-light);
            font-size: var(--fs-small);
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-content {
                gap: 3rem;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 3rem;
            }
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 3rem;
            }
            .hero-text p {
                max-width: 100%;
            }
            .hero-buttons {
                justify-content: center;
            }
            .nav-menu,
            .nav-cta .btn-secondary {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .footer-content {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 2rem;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 280px;
            }
            .stat-number {
                font-size: 2.8rem;
            }
        }

/* roulang page: category1 */
:root {
            /* 色彩系统 */
            --color-primary: #0064A4;
            --color-primary-hover: #0086D6;
            --color-secondary: #34D058;
            --color-accent: #FF8C42;
            --color-bg-dark: #0D1117;
            --color-bg-content: #161B22;
            --color-text: rgba(255, 255, 255, 0.85);
            --color-text-light: rgba(255, 255, 255, 0.6);
            --color-border: rgba(255, 255, 255, 0.1);
            --color-card-bg: rgba(255, 255, 255, 0.05);

            /* 尺寸与间距 */
            --radius: 0.75rem;
            --shadow-card: 0 10px 30px rgba(0, 100, 164, 0.15);
            --shadow-glow: 0 0 15px rgba(52, 208, 88, 0.5);
            --spacing-section: 5rem;
            --spacing-mobile-section: 3rem;
            --container-width: 1200px;
        }
        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            font-size: 1rem;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        /* 容器 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        /* 标题 */
        h1 { font-size: 2rem; font-weight: 700; line-height: 1.3; margin-bottom: 1.5rem; }
        h2 { font-size: 1.75rem; font-weight: 600; line-height: 1.4; margin-bottom: 1.5rem; }
        h3 { font-size: 1.5rem; font-weight: 600; line-height: 1.4; margin-bottom: 1rem; }
        h4 { font-size: 1.25rem; font-weight: 500; line-height: 1.5; margin-bottom: 0.75rem; }
        p { margin-bottom: 1.5rem; }
        .text-light { color: var(--color-text-light); font-size: 0.875rem; }
        .section-subtitle {
            color: var(--color-secondary);
            font-size: 1rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 1rem;
        }
        /* 导航 - 沿用首页风格 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background-color: rgba(13, 17, 23, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            max-width: var(--container-width);
            margin: 0 auto;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .logo-icon {
            color: var(--color-primary);
            font-size: 2rem;
        }
        .logo-text {
            font-size: 1.75rem;
            font-weight: 800;
            color: white;
        }
        .logo-sub {
            font-size: 0.875rem;
            color: var(--color-text-light);
            margin-left: 0.5rem;
        }
        .nav-menu {
            display: flex;
            gap: 2.5rem;
            align-items: center;
        }
        .nav-link {
            font-weight: 500;
            color: var(--color-text-light);
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-link:hover,
        .nav-link.active {
            color: white;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--color-primary);
            border-radius: 3px;
        }
        .nav-cta {
            background-color: var(--color-primary);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .nav-cta:hover {
            background-color: var(--color-primary-hover);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        /* 英雄区 */
        .hero {
            padding-top: 8rem;
            padding-bottom: var(--spacing-section);
            position: relative;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(rgba(13, 17, 23, 0.9), rgba(13, 17, 23, 0.7)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            z-index: -1;
        }
        .hero-content {
            max-width: 800px;
        }
        .hero h1 {
            font-size: 2.5rem;
            background: linear-gradient(90deg, white, var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.125rem;
            max-width: 600px;
        }
        /* 按钮 */
        .btn {
            display: inline-block;
            padding: 0.875rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            text-align: center;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: white;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            box-shadow: var(--shadow-glow);
        }
        .btn-secondary {
            background-color: transparent;
            color: white;
            border: 1px solid var(--color-border);
        }
        .btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: var(--color-text-light);
        }
        .btn-lg {
            padding: 1rem 2.5rem;
            font-size: 1.125rem;
        }
        .btn-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 2rem;
        }
        /* 卡片与玻璃拟态 */
        .card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            padding: 2rem;
            backdrop-filter: blur(10px);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0, 100, 164, 0.3);
        }
        .card-icon {
            font-size: 2rem;
            color: var(--color-primary);
            margin-bottom: 1.5rem;
        }
        /* 手风琴 */
        .accordion {
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 1rem;
        }
        .accordion-header {
            padding: 1.5rem;
            background-color: var(--color-bg-content);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .accordion-header:hover {
            background-color: rgba(255, 255, 255, 0.03);
        }
        .accordion-header h4 {
            margin-bottom: 0;
            color: white;
        }
        .accordion-header.active h4 {
            color: var(--color-secondary);
        }
        .accordion-icon {
            transition: transform 0.3s ease;
        }
        .accordion-header.active .accordion-icon {
            transform: rotate(180deg);
        }
        .accordion-content {
            padding: 0 1.5rem;
            max-height: 0;
            overflow: hidden;
            background-color: rgba(10, 13, 18, 0.5);
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .accordion-content.active {
            padding: 1.5rem;
            max-height: 500px;
        }
        /* 网格与板块 */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .grid {
            display: grid;
            gap: 2rem;
        }
        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .feature-list {
            list-style: none;
        }
        .feature-list li {
            margin-bottom: 1rem;
            padding-left: 1.75rem;
            position: relative;
        }
        .feature-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--color-secondary);
            font-weight: bold;
        }
        /* 场景展示 */
        .scenario-card {
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .scenario-img {
            height: 200px;
            border-radius: var(--radius) var(--radius) 0 0;
            overflow: hidden;
        }
        .scenario-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scenario-body {
            padding: 1.5rem;
            flex-grow: 1;
        }
        .tag {
            display: inline-block;
            background-color: rgba(52, 208, 88, 0.1);
            color: var(--color-secondary);
            padding: 0.25rem 0.75rem;
            border-radius: 1rem;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        /* 步骤引导 */
        .steps {
            counter-reset: step-counter;
            position: relative;
        }
        .steps::before {
            content: '';
            position: absolute;
            top: 2rem;
            left: 1.5rem;
            width: 2px;
            height: calc(100% - 4rem);
            background-color: var(--color-border);
            z-index: -1;
        }
        .step {
            display: flex;
            align-items: flex-start;
            margin-bottom: 3rem;
            position: relative;
        }
        .step:last-child {
            margin-bottom: 0;
        }
        .step-number {
            flex-shrink: 0;
            width: 3rem;
            height: 3rem;
            border-radius: 50%;
            background-color: var(--color-primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.125rem;
            margin-right: 1.5rem;
        }
        .step-content h4 {
            color: white;
        }
        /* CTA */
        .cta-section {
            background-color: var(--color-bg-content);
            border-radius: var(--radius);
            padding: 4rem 2rem;
            text-align: center;
        }
        .cta-section h2 {
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        /* 页脚 - 沿用 */
        footer {
            background-color: #0A0D12;
            padding: 3rem 0 1.5rem;
            border-top: 1px solid var(--color-border);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 3rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo {
            margin-bottom: 1rem;
        }
        .footer-desc {
            color: var(--color-text-light);
            font-size: 0.875rem;
            line-height: 1.7;
        }
        .footer-links h3,
        .footer-contact h3 {
            color: white;
            font-size: 1.125rem;
            margin-bottom: 1.25rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a:hover {
            color: var(--color-primary);
        }
        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--color-text-light);
            margin-bottom: 1rem;
            font-size: 0.875rem;
        }
        .footer-contact i {
            color: var(--color-primary);
            width: 1rem;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
 color: var(--color-text-light);
            font-size: 0.8125rem;
        }
        /* 响应式 */
        @media (max-width: 1023px) {
            h1 { font-size: 1.75rem; }
            h2 { font-size: 1.5rem; }
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .section { padding: var(--spacing-mobile-section) 0; }
            .footer-content { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 767px) {
            .header-container { padding: 1rem; }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                flex-direction: column;
                background-color: var(--color-bg-dark);
                border-top: 1px solid var(--color-border);
                padding: 1rem 0;
                gap: 0;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-link {
                padding: 1rem 1.5rem;
                width: 100%;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background-color: rgba(0, 100, 164, 0.1);
                border-left: 3px solid var(--color-primary);
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero { padding-top: 6rem; padding-bottom: var(--spacing-mobile-section); }
            .hero h1 { font-size: 2rem; }
            .btn-group { flex-direction: column; align-items: stretch; }
            .btn { width: 100%; }
            .grid-2,
            .grid-3 { grid-template-columns: 1fr; }
            .footer-content { grid-template-columns: 1fr; gap: 2rem; }
        }