:root {
            --bg-color: #0b0716;
            --bg-card: #150d2a;
            --bg-card-hover: #1e133a;
            --text-main: #f3f1f8;
            --text-muted: #b3a6cf;
            --accent-pink: #ff007f;
            --accent-purple: #8a2be2;
            --accent-cyan: #00f3ff;
            --gradient-primary: linear-gradient(135deg, #ff007f 0%, #7b2cbf 50%, #00f3ff 100%);
            --gradient-dark: linear-gradient(180deg, #0b0716 0%, #150d2a 100%);
            --border-glow: 1px solid rgba(255, 0, 127, 0.3);
            --box-shadow-glow: 0 0 20px rgba(255, 0, 127, 0.25);
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            background: var(--bg-color);
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        a:hover {
            color: var(--accent-pink);
            text-shadow: 0 0 8px rgba(255, 0, 127, 0.6);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* 顶部导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 7, 22, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(138, 43, 226, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .ai-page-logo {
            max-height: 40px;
            width: auto;
            filter: drop-shadow(0 0 5px var(--accent-pink));
        }

        .brand-title {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(90deg, #fff, var(--accent-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-links {
            display: flex;
            gap: 0;
            align-items: center;
            list-style: none;
        }

        .nav-links li a {
            padding: 8px 12px;
            font-size: 0.88rem;
            color: var(--text-main);
            font-weight: 500;
            white-space: nowrap;
            transition: color 0.3s ease;
        }

        .nav-links li a:hover {
            color: var(--accent-cyan);
        }

        .ai-page-home-link {
            background: rgba(255, 0, 127, 0.2);
            border: 1px solid var(--accent-pink);
            padding: 6px 14px !important;
            border-radius: 20px;
            color: #fff !important;
        }

        .nav-cta {
            background: var(--gradient-primary);
            color: #fff;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: bold;
            box-shadow: var(--box-shadow-glow);
            display: inline-block;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 243, 255, 0.6);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-main);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 英雄首屏 (严禁出现任何图片) */
        .hero-section {
            padding: 150px 0 80px;
            background: radial-gradient(circle at 50% 30%, rgba(138, 43, 226, 0.3) 0%, rgba(11, 7, 22, 1) 70%);
            text-align: center;
            position: relative;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 0, 127, 0.15);
            border: 1px solid var(--accent-pink);
            border-radius: 20px;
            color: var(--accent-pink);
            font-size: 0.85rem;
            font-weight: bold;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 2.5rem;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 20px;
            background: linear-gradient(180deg, #ffffff 0%, #e2b0ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 30px rgba(138, 43, 226, 0.5);
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 35px;
            line-height: 1.8;
        }

        .hero-btns {
            display: flex;
            gap: 20px;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .btn-primary {
            background: var(--gradient-primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: 30px;
            font-size: 1.05rem;
            font-weight: bold;
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.5);
            transition: all 0.3s ease;
            display: inline-block;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 0 35px rgba(0, 243, 255, 0.8);
            color: #fff;
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: rgba(0, 243, 255, 0.15);
            box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
            color: #fff;
        }

        .hero-metrics {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .metric-card {
            background: var(--bg-card);
            border: var(--border-glow);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            transition: transform 0.3s ease;
        }

        .metric-card:hover {
            transform: translateY(-5px);
            background: var(--bg-card-hover);
        }

        .metric-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-pink);
            margin-bottom: 5px;
            font-family: monospace;
        }

        .metric-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 通用 Section */
        .section-padding {
            padding: 80px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-subtitle {
            color: var(--accent-cyan);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-weight: 700;
            margin-bottom: 8px;
            display: block;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
        }

        .section-desc {
            color: var(--text-muted);
            max-width: 700px;
            margin: 10px auto 0;
            font-size: 0.95rem;
        }

        /* 卡片网格布局 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid rgba(138, 43, 226, 0.2);
            border-radius: 12px;
            padding: 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            border-color: var(--accent-pink);
            box-shadow: var(--box-shadow-glow);
            transform: translateY(-4px);
        }

        .card-icon {
            font-size: 2.2rem;
            margin-bottom: 18px;
            display: inline-block;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .card-text {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .tag {
            background: rgba(0, 243, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: 4px;
            border: 1px solid rgba(0, 243, 255, 0.2);
        }

        /* 图文展台组件 */
        .media-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            align-items: center;
        }

        .case-card {
            background: var(--bg-card);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(255, 0, 127, 0.2);
        }

        .case-img-box {
            width: 100%;
            overflow: hidden;
            background: #000;
        }

        .ai-page-image {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }

        .case-card:hover .ai-page-image {
            transform: scale(1.05);
        }

        .case-content {
            padding: 20px;
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid rgba(138, 43, 226, 0.3);
            border-radius: 12px;
            padding: 25px;
            position: relative;
        }

        .step-num {
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(255, 0, 127, 0.3);
            position: absolute;
            top: 15px;
            right: 20px;
            font-family: monospace;
        }

        /* 对比评测表格 */
        .rating-box {
            background: linear-gradient(90deg, rgba(255, 0, 127, 0.15), rgba(138, 43, 226, 0.15));
            border: var(--border-glow);
            border-radius: 12px;
            padding: 30px;
            margin-bottom: 40px;
            display: flex;
            justify-content: space-around;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            text-align: center;
        }

        .rating-stars {
            color: #ffd700;
            font-size: 1.8rem;
        }

        .rating-score {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--accent-pink);
            font-family: monospace;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(138, 43, 226, 0.3);
        }

        .compare-table th, .compare-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.9rem;
        }

        .compare-table th {
            background: rgba(138, 43, 226, 0.3);
            color: #fff;
            font-weight: 700;
        }

        .compare-table tr:hover {
            background: var(--bg-card-hover);
        }

        .highlight-col {
            background: rgba(255, 0, 127, 0.1);
            font-weight: bold;
            color: var(--accent-pink);
        }

        /* 评论区卡片 */
        .review-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 243, 255, 0.2);
            border-radius: 12px;
            padding: 22px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .avatar-dummy {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: #fff;
        }

        .user-info h4 {
            font-size: 0.95rem;
            color: #fff;
        }

        .user-info p {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* FAQ折叠面板 */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(138, 43, 226, 0.2);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: "+";
            font-size: 1.4rem;
            color: var(--accent-cyan);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-question::after {
            content: "−";
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.9rem;
            display: none;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* 表单板块 */
        .form-container {
            background: var(--bg-card);
            border: var(--border-glow);
            border-radius: 16px;
            padding: 40px;
            max-width: 800px;
            margin: 0 auto;
            box-shadow: var(--box-shadow-glow);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            color: var(--text-main);
            font-size: 0.9rem;
            font-weight: 600;
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px 16px;
            background: rgba(11, 7, 22, 0.8);
            border: 1px solid rgba(138, 43, 226, 0.4);
            border-radius: 8px;
            color: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--accent-pink);
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.3);
        }

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

        /* 底部信息 */
        .site-footer {
            background: #06040c;
            padding: 60px 0 30px;
            border-top: 1px solid rgba(138, 43, 226, 0.3);
            color: var(--text-muted);
            font-size: 0.88rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h3 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 15px;
            margin-top: 15px;
        }

        .friend-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .friend-links a:hover {
            color: var(--accent-cyan);
        }

        .copyright-bar {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.8rem;
        }

        /* 浮动客服 */
        .float-kefu {
            position: fixed;
            right: 25px;
            bottom: 25px;
            z-index: 999;
            background: var(--bg-card);
            border: var(--border-glow);
            border-radius: 50px;
            padding: 10px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            box-shadow: var(--box-shadow-glow);
            cursor: pointer;
        }

        .float-kefu img {
            width: 32px;
            height: 32px;
            border-radius: 50%;
        }

        /* 响应式调优 */
        @media (max-width: 992px) {
            .hero-metrics {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                background: #0b0716;
                flex-direction: column;
                padding: 20px 0;
                border-bottom: 1px solid var(--accent-purple);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-metrics {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }