/* 根变量及涂鸦风配色体系 (Neo-Brutalist & Graffiti Style) */
        :root {
            --bg-color: #faf8f5;
            --text-color: #1a1a1a;
            --primary-yellow: #FFD600;
            --primary-cyan: #00E5FF;
            --primary-magenta: #FF2E93;
            --primary-purple: #8A2BE2;
            --primary-green: #39FF14;
            --dark-border: #1a1a1a;
            --container-width: 1200px;
            --font-display: 'Space Grotesk', 'ZCOOL KuaiLe', sans-serif;
        }

        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: 'Noto Sans SC', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
            background-image: 
                radial-gradient(var(--text-color) 1px, transparent 1px),
                radial-gradient(var(--text-color) 1px, transparent 1px);
            background-size: 24px 24px;
            background-position: 0 0, 12px 12px;
            opacity: 0.99;
        }

        /* 涂鸦风公共组件样式 (Neobrutalism UI) */
        .brutal-card {
            background: #ffffff;
            border: 3px solid var(--dark-border);
            box-shadow: 6px 6px 0px var(--dark-border);
            border-radius: 12px;
            padding: 24px;
            transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }
        .brutal-card:hover {
            transform: translate(-4px, -4px);
            box-shadow: 10px 10px 0px var(--dark-border);
        }

        .brutal-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-display);
            font-weight: 700;
            text-decoration: none;
            color: var(--text-color);
            padding: 12px 28px;
            border: 3px solid var(--dark-border);
            box-shadow: 4px 4px 0px var(--dark-border);
            border-radius: 8px;
            transition: all 0.1s ease;
            cursor: pointer;
            text-transform: uppercase;
        }
        .brutal-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px var(--dark-border);
        }
        .brutal-btn:active {
            transform: translate(2px, 2px);
            box-shadow: 2px 2px 0px var(--dark-border);
        }

        .btn-yellow { background-color: var(--primary-yellow); }
        .btn-cyan { background-color: var(--primary-cyan); }
        .btn-magenta { background-color: var(--primary-magenta); color: #fff; }

        .section-title {
            font-family: var(--font-display);
            font-size: 2.5rem;
            text-align: center;
            margin-bottom: 40px;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
            padding: 8px 16px;
            background: var(--primary-yellow);
            border: 3px solid var(--dark-border);
            box-shadow: 4px 4px 0px var(--dark-border);
            transform: translateX(-50%) rotate(-1deg);
        }
        .section-title span {
            display: block;
            transform: rotate(1deg);
        }

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

        /* 导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #ffffff;
            border-bottom: 3px solid var(--dark-border);
            padding: 15px 0;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo-box {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .ai-page-logo {
            height: 45px;
            object-fit: contain;
        }
        .brand-text {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 900;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
        }
        .nav-link {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 700;
            padding: 6px 12px;
            border-radius: 4px;
            transition: all 0.2s;
        }
        .nav-link:hover {
            background-color: var(--primary-cyan);
            border: 2px solid var(--dark-border);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: 2px solid var(--dark-border);
            padding: 8px;
            background: var(--primary-yellow);
        }
        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--dark-border);
        }

        /* Section 通用间距 */
        section {
            padding: 80px 0;
            border-bottom: 3px solid var(--dark-border);
            position: relative;
        }

        /* Hero 区域 (无图片) */
        #hero {
            background: radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.1) 0%, rgba(255, 46, 147, 0.1) 90.2%);
            padding: 100px 0;
            position: relative;
        }
        .hero-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: var(--primary-magenta);
            color: white;
            font-weight: bold;
            padding: 6px 16px;
            border: 2px solid var(--dark-border);
            border-radius: 50px;
            transform: rotate(-2deg);
            margin-bottom: 24px;
            font-family: var(--font-display);
        }
        h1.hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--text-color);
            text-shadow: 3px 3px 0px var(--primary-cyan);
        }
        .hero-desc {
            font-size: 1.25rem;
            margin-bottom: 40px;
            color: #4a4a4a;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-features-badge {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 50px;
            flex-wrap: wrap;
        }
        .f-badge {
            background: #ffffff;
            border: 2px solid var(--dark-border);
            padding: 8px 16px;
            border-radius: 4px;
            font-weight: bold;
            box-shadow: 3px 3px 0px var(--dark-border);
        }

        /* 数据指标卡片 */
        #about { background-color: #fff; }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        .metric-num {
            font-family: var(--font-display);
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--primary-magenta);
            margin-bottom: 10px;
        }

        /* 全平台 AIGC 服务 */
        .model-tags-container {
            margin-top: 30px;
            background: #ffffff;
            border: 3px solid var(--dark-border);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 6px 6px 0px var(--dark-border);
        }
        .model-tags-title {
            font-size: 1.25rem;
            font-weight: bold;
            margin-bottom: 20px;
            text-align: center;
        }
        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .model-tag {
            background: var(--bg-color);
            border: 2px solid var(--dark-border);
            padding: 6px 14px;
            border-radius: 6px;
            font-weight: bold;
            transition: all 0.2s;
        }
        .model-tag:hover {
            background: var(--primary-yellow);
            transform: scale(1.05);
        }

        /* 制作板块与流程 */
        .step-timeline {
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }
        .step-timeline::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--dark-border);
        }
        .step-item {
            display: flex;
            gap: 20px;
            position: relative;
            padding-left: 50px;
        }
        .step-num {
            position: absolute;
            left: 0;
            width: 44px;
            height: 44px;
            background: var(--primary-cyan);
            border: 3px solid var(--dark-border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-family: var(--font-display);
        }

        /* 对比评测表格 */
        .comparison-table-wrapper {
            overflow-x: auto;
            margin-top: 40px;
            border: 3px solid var(--dark-border);
            box-shadow: 6px 6px 0px var(--dark-border);
            border-radius: 12px;
            background: white;
        }
        table.comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        table.comparison-table th, table.comparison-table td {
            padding: 16px;
            border-bottom: 2px solid var(--dark-border);
            border-right: 2px solid var(--dark-border);
        }
        table.comparison-table th {
            background-color: var(--primary-yellow);
            font-weight: bold;
        }
        table.comparison-table tr:last-child td {
            border-bottom: none;
        }
        table.comparison-table td:last-child, table.comparison-table th:last-child {
            border-right: none;
        }
        .highlight-cell {
            background-color: rgba(0, 229, 255, 0.08);
            font-weight: bold;
        }
        .rating-star {
            color: #FF8F00;
            font-size: 1.2rem;
        }

        /* 案例展示区 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        .case-image-wrapper {
            border: 2px solid var(--dark-border);
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 15px;
            height: 200px;
            background: #e0e0e0;
        }
        .case-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* FAQ 折叠面板 */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            margin-top: 40px;
        }
        .faq-item {
            background: #ffffff;
            border: 3px solid var(--dark-border);
            border-radius: 8px;
            overflow: hidden;
        }
        .faq-header {
            padding: 20px;
            background: #ffffff;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: bold;
            user-select: none;
            transition: background 0.2s;
        }
        .faq-header:hover {
            background: var(--primary-cyan);
        }
        .faq-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            background: #fbfbfb;
            border-top: 0px solid var(--dark-border);
        }
        .faq-item.active .faq-body {
            padding: 20px;
            max-height: 500px;
            border-top: 2px solid var(--dark-border);
        }
        .faq-icon {
            font-size: 1.5rem;
            transition: transform 0.3s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* 需求匹配表单 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            margin-top: 40px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-weight: bold;
            margin-bottom: 8px;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 3px solid var(--dark-border);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            background: white;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-magenta);
            box-shadow: 3px 3px 0px var(--dark-border);
        }
        .qr-card {
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: var(--primary-yellow);
        }
        .qr-card img {
            width: 180px;
            height: 180px;
            border: 3px solid var(--dark-border);
            margin-bottom: 15px;
            background: white;
        }

        /* 文章列表 */
        .article-card-link {
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .article-meta {
            font-size: 0.85rem;
            color: #666;
            margin-bottom: 8px;
        }

        /* 浮动客服 */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .float-btn {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--primary-yellow);
            border: 3px solid var(--dark-border);
            box-shadow: 3px 3px 0px var(--dark-border);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: all 0.2s;
        }
        .float-btn:hover {
            transform: scale(1.05) translate(-2px, -2px);
            box-shadow: 5px 5px 0px var(--dark-border);
        }
        .float-btn svg {
            width: 28px;
            height: 28px;
        }
        .float-qr-pop {
            display: none;
            position: absolute;
            right: 70px;
            bottom: 0;
            background: white;
            border: 3px solid var(--dark-border);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 4px 4px 0px var(--dark-border);
            text-align: center;
            width: 160px;
        }
        .float-qr-pop img {
            width: 120px;
            height: 120px;
        }
        .float-btn:hover .float-qr-pop {
            display: block;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: var(--text-color);
            color: #ffffff;
            padding: 60px 0 20px 0;
            border-top: 5px solid var(--dark-border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: var(--primary-yellow);
            margin-bottom: 20px;
            font-family: var(--font-display);
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--primary-cyan);
        }
        .friendship-links {
            margin-top: 30px;
            border-top: 1px solid #444;
            padding-top: 20px;
        }
        .friendship-links a {
            color: #aaa;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
            font-size: 0.9rem;
        }
        .friendship-links a:hover {
            color: var(--primary-cyan);
        }
        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #444;
            font-size: 0.85rem;
            color: #888;
        }

        /* 自助排查卡片 */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        /* 移动端适配 */
        @media (max-width: 992px) {
            h1.hero-title {
                font-size: 2.5rem;
            }
            .contact-layout {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                border-bottom: 3px solid var(--dark-border);
                flex-direction: column;
                padding: 20px;
                gap: 15px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
        }