/* CSS Reset & Base */
        *, *::before, *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary: #16213e;
            --secondary: #0f3460;
            --accent: #e94560;
            --text: #1a1a2e;
            --text-light: #4a4a6a;
            --bg: #f8f9fc;
            --white: #ffffff;
            --bilibili: #00a1d6;
            --xianyu: #ffb800;
            --taobao: #ff5000;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --radius: 12px;
        }
        
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        
        /* 容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部导航 */
        header {
            background: var(--white);
            box-shadow: var(--shadow);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--primary);
        }
        
        .logo-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .logo-text {
            font-size: 1.4rem;
            font-weight: 700;
        }
        
        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--text-light);
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: var(--accent);
        }
        
        .nav-social {
            display: flex;
            gap: 12px;
        }
        
        .social-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .social-link.bilibili {
            background: rgba(0, 161, 214, 0.1);
            color: var(--bilibili);
        }
        
        .social-link.bilibili:hover {
            background: var(--bilibili);
            color: white;
        }
        
        .social-link.xianyu {
            background: rgba(255, 184, 0, 0.1);
            color: var(--xianyu);
        }
        
        .social-link.xianyu:hover {
            background: var(--xianyu);
            color: white;
        }
        
        .social-link svg {
            width: 16px;
            height: 16px;
        }
        
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
        }
        
        .mobile-menu span {
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        
        /* Hero 区域 */
        .hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }
        
        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
        }
        
        .hero h1 span {
            color: var(--accent);
        }
        
        .hero p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 32px;
        }
        
        .hero-features {
            display: flex;
            gap: 20px;
            margin-bottom: 40px;
        }
        
        .hero-feature {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
        }
        
        .hero-feature svg {
            width: 20px;
            height: 20px;
            color: #4ade80;
        }
        
        .cta-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .btn-primary {
            background: var(--accent);
            color: var(--white);
        }
        
        .btn-primary:hover {
            background: #d63d56;
            transform: translateY(-2px);
        }
        
        .btn-secondary {
            background: rgba(255,255,255,0.15);
            color: var(--white);
            border: 1px solid rgba(255,255,255,0.3);
        }
        
        .btn-secondary:hover {
            background: rgba(255,255,255,0.25);
        }
        
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .hero-placeholder {
            width: 100%;
            max-width: 480px;
            aspect-ratio: 4/3;
            background: linear-gradient(145deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
            border-radius: var(--radius);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 20px;
            border: 2px dashed rgba(255,255,255,0.2);
        }
        
        .hero-image {
            width: 100%;
            max-width: 500px;
            border-radius: var(--radius);
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }
        
        .hero-placeholder-icon {
            font-size: 80px;
        }
        
        .hero-placeholder-text {
            font-size: 1.2rem;
            opacity: 0.7;
        }
        
        /* 平台入口横幅 */
        .platform-banner {
            padding: 30px 0;
            background: var(--white);
            border-bottom: 1px solid #eee;
        }
        
        .platform-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        
        .platform-card {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 24px;
            background: var(--bg);
            border-radius: var(--radius);
            text-decoration: none;
            transition: all 0.3s;
            border: 2px solid transparent;
        }
        
        .platform-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        
        .platform-card.bilibili:hover {
            border-color: var(--bilibili);
        }
        
        .platform-card.xianyu:hover {
            border-color: var(--xianyu);
        }
        
        .platform-icon {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            flex-shrink: 0;
        }
        
        .platform-card.bilibili .platform-icon {
            background: var(--bilibili);
        }
        
        .platform-card.xianyu .platform-icon {
            background: var(--xianyu);
        }
        
        .platform-info h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }
        
        .platform-info p {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        .platform-arrow {
            margin-left: auto;
            width: 24px;
            height: 24px;
            color: var(--text-light);
        }
        
        /* 特性区域 */
        .features {
            padding: 100px 0;
            background: var(--white);
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(233, 69, 96, 0.1);
            color: var(--accent);
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        
        .section-title {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }
        
        .section-desc {
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .feature-card {
            padding: 32px;
            background: var(--bg);
            border-radius: var(--radius);
            transition: all 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 20px;
        }
        
        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--primary);
        }
        
        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
        }
        
        /* 产品区域 */
        .products {
            padding: 100px 0;
            background: var(--bg);
        }
        
        /* 外壳颜色选择 */
        .colors-section {
            background: linear-gradient(180deg, var(--bg) 0%, #f8f9fa 100%);
            padding: 80px 0;
        }
        
        .colors-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-top: 40px;
        }
        
        .color-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            transition: transform 0.3s;
        }
        
        .color-item:hover {
            transform: scale(1.1);
        }
        
        .color-circle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            transition: all 0.3s;
        }
        
        .color-item:hover .color-circle {
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        }
        
        .color-item span {
            font-size: 14px;
            color: var(--text);
            font-weight: 500;
        }
        
        .colors-note {
            text-align: center;
            margin-top: 40px;
            padding: 20px;
            background: rgba(52, 152, 219, 0.1);
            border-radius: var(--radius);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .colors-note p {
            color: var(--text);
            margin: 5px 0;
            font-size: 14px;
        }
        
        .colors-note strong {
            color: var(--primary);
        }
        
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .product-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s;
        }
        
        .product-card:hover {
            transform: translateY(-5px);
        }
        
        .product-image {
            height: 200px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 64px;
        }
        
        .product-image span {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.8);
        }
        
        .product-content {
            padding: 24px;
        }
        
        .product-badge {
            display: inline-block;
            padding: 4px 10px;
            background: var(--accent);
            color: var(--white);
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        
        .product-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--primary);
        }
        
        .product-card .spec {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }
        
        .product-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-bottom: 20px;
        }
        
        .stat {
            text-align: center;
            padding: 12px;
            background: var(--bg);
            border-radius: 8px;
        }
        
        .stat-value {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent);
        }
        
        .stat-label {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        
        .product-features {
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid #eee;
        }
        
        .product-features li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 8px;
            list-style: none;
        }
        
        .product-features li::before {
            content: '✓';
            color: #4ade80;
            font-weight: bold;
        }
        
        /* 改装方案详情 */
        .modding-detail {
            padding: 100px 0;
            background: var(--white);
        }
        
        .modding-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        
        .modding-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
        }
        
        .modding-header {
            padding: 24px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
        }
        
        .modding-header h3 {
            font-size: 1.3rem;
            margin-bottom: 8px;
        }
        
        .modding-header p {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        
        .modding-body {
            padding: 24px;
        }
        
        .modding-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #eee;
        }
        
        .modding-item:last-child {
            border-bottom: none;
        }
        
        .modding-label {
            color: var(--text-light);
            font-size: 0.95rem;
        }
        
        .modding-value {
            font-weight: 600;
            color: var(--primary);
        }
        
        .modding-value.upgrade {
            color: var(--accent);
        }
        
        /* 方案对比 */
        .comparison {
            padding: 100px 0;
            background: var(--bg);
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        
        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: center;
        }
        
        .comparison-table thead {
            background: var(--primary);
            color: var(--white);
        }
        
        .comparison-table th:first-child {
            text-align: left;
        }
        
        .comparison-table tbody tr:nth-child(even) {
            background: var(--bg);
        }
        
        .comparison-table td:first-child {
            text-align: left;
            font-weight: 500;
        }
        
        .check {
            color: #4ade80;
            font-weight: bold;
        }
        
        .cross {
            color: #ef4444;
        }
        
        /* 视频教程 */
        .video-section {
            padding: 100px 0;
            background: var(--white);
        }
        
        .video-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        
        .video-info h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        
        .video-info p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        
        .video-list {
            list-style: none;
        }
        
        .video-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid #eee;
        }
        
        .video-list li:last-child {
            border-bottom: none;
        }
        
        .video-list .icon {
            width: 40px;
            height: 40px;
            background: var(--bilibili);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
        }
        
        .video-list .text {
            flex: 1;
        }
        
        .video-list .title {
            font-weight: 500;
            color: var(--primary);
        }
        
        .video-list .desc {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        
        .video-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background: var(--bilibili);
            color: white;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            margin-top: 20px;
            transition: all 0.3s;
        }
        
        .video-cta:hover {
            background: #0091ba;
            transform: translateY(-2px);
        }
        
        .video-preview {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 40px;
            text-align: center;
        }
        
        .video-preview-icon {
            font-size: 80px;
            margin-bottom: 16px;
        }
        
        .video-preview-text {
            color: var(--text-light);
            margin-bottom: 20px;
        }
        
        /* 流程 */
        .process {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--white);
        }
        
        .process .section-title {
            color: var(--white);
        }
        
        .process .section-desc {
            color: rgba(255,255,255,0.8);
        }
        
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        
        .process-step {
            text-align: center;
        }
        
        .step-number {
            width: 70px;
            height: 70px;
            background: rgba(255,255,255,0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0 auto 20px;
            border: 2px solid var(--accent);
        }
        
        .process-step h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        
        .process-step p {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        
        /* 常见问题 */
        .faq {
            padding: 100px 0;
            background: var(--bg);
        }
        
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: var(--white);
            border-radius: var(--radius);
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--accent);
            transition: transform 0.3s;
        }
        
        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }
        
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s;
            color: var(--text-light);
        }
        
        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            max-height: 200px;
        }
        
        /* 联系 */
        .contact {
            padding: 100px 0;
            background: var(--white);
        }
        
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: start;
        }
        
        .contact-info h2 {
            font-size: 2rem;
            margin-bottom: 20px;
            color: var(--primary);
        }
        
        .contact-info > p {
            color: var(--text-light);
            margin-bottom: 30px;
        }
        
        .contact-channels {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        
        .contact-icon {
            width: 50px;
            height: 50px;
            background: var(--bg);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .contact-item.bilibili .contact-icon {
            background: rgba(0, 161, 214, 0.1);
        }
        
        .contact-item.xianyu .contact-icon {
            background: rgba(255, 184, 0, 0.1);
        }
        
        .contact-text h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }
        
        .contact-text p {
            color: var(--text-light);
            font-size: 0.95rem;
        }
        
        .contact-text a {
            color: var(--accent);
            text-decoration: none;
        }
        
        .contact-text a:hover {
            text-decoration: underline;
        }
        
        .contact-form {
            background: var(--bg);
            padding: 40px;
            border-radius: var(--radius);
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            font-weight: 500;
            margin-bottom: 8px;
            color: var(--primary);
        }
        
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.3s;
            background: white;
        }
        
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent);
        }
        
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        
        .submit-btn {
            width: 100%;
            padding: 14px;
            background: var(--accent);
            color: var(--white);
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .submit-btn:hover {
            background: #d63d56;
        }
        
        /* 页脚 */
        footer {
            background: var(--primary);
            color: rgba(255,255,255,0.7);
            padding: 40px 0 20px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }
        
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--white);
        }
        
        .footer-social {
            display: flex;
            gap: 16px;
        }
        
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 8px;
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .footer-social a:hover {
            background: var(--accent);
            color: white;
        }
        
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.8);
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
        }
        
        /* 响应式 */
        @media (max-width: 968px) {
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            
            .hero-features {
                justify-content: center;
            }
            
            .cta-buttons {
                justify-content: center;
            }
            
            .nav-social {
                display: none;
            }
            
            .platform-grid,
            .video-content,
            .contact-grid {
                grid-template-columns: 1fr;
            }
            
            .features-grid,
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .process-grid,
            .modding-cards {
                grid-template-columns: 1fr;
            }
            
            .nav-links {
                display: none;
            }
            
            .mobile-menu {
                display: flex;
            }
        }
        
        @media (max-width: 640px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero-features {
                flex-direction: column;
                gap: 12px;
            }
            
            .features-grid,
            .products-grid {
                grid-template-columns: 1fr;
            }
            
            .comparison-table {
                font-size: 0.85rem;
            }
            
            .footer-content {
                flex-direction: column;
                gap: 20px;
                text-align: center;
            }
        }