/* 变量定义 - 撞色艳色风 */
        :root {
            --bg-primary: #f8fafc;
            --bg-secondary: #ffffff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --primary: #2563eb;       /* 艳蓝色 */
            --accent-pink: #db2777;   /* 艳粉色 */
            --accent-yellow: #eab308; /* 活力黄 */
            --accent-green: #10b981;  /* 荧光绿 */
            --border-color: #0f172a;  /* 粗边框 */
            --card-shadow: 6px 6px 0px 0px #0f172a;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --container-width: 1200px;
        }

        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 导航栏 */
        header {
            background-color: var(--bg-secondary);
            border-bottom: 3px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            height: 40px;
            display: block;
        }
        .brand-name {
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }
        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
            align-items: center;
        }
        .nav-menu a {
            text-decoration: none;
            color: var(--text-main);
            font-weight: 700;
            font-size: 0.95rem;
            transition: color 0.2s;
            padding: 5px 8px;
            border: 2px solid transparent;
        }
        .nav-menu a:hover {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
        }

        /* 首屏 Hero Section (无图片) */
        .hero {
            background: linear-gradient(135deg, #eff6ff 0%, #fae8ff 100%);
            border-bottom: 3px solid var(--border-color);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero-badge {
            display: inline-block;
            background-color: var(--accent-yellow);
            color: var(--text-main);
            font-weight: 800;
            border: 2px solid var(--border-color);
            padding: 6px 16px;
            margin-bottom: 24px;
            transform: rotate(-2deg);
            box-shadow: 2px 2px 0 var(--border-color);
            font-size: 0.9rem;
        }
        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--text-main);
        }
        .hero p {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 35px;
            font-weight: 500;
        }
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-block;
            text-decoration: none;
            padding: 14px 28px;
            font-weight: 800;
            font-size: 1rem;
            border: 3px solid var(--border-color);
            position: relative;
            transition: transform 0.1s, box-shadow 0.1s;
            cursor: pointer;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 4px 4px 0 var(--border-color);
        }
        .btn-primary:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0 var(--border-color);
        }
        .btn-accent {
            background-color: var(--accent-pink);
            color: #ffffff;
            box-shadow: 4px 4px 0 var(--border-color);
        }
        .btn-accent:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0 var(--border-color);
        }
        .hero-decorations {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            pointer-events: none;
        }
        .decor-circle {
            position: absolute;
            border: 3px solid var(--border-color);
            border-radius: 50%;
            background-color: transparent;
        }
        .decor-c1 { width: 80px; height: 80px; top: 15%; left: 8%; border-color: var(--primary); opacity: 0.3; }
        .decor-c2 { width: 120px; height: 120px; bottom: 10%; right: 5%; border-color: var(--accent-pink); opacity: 0.3; }

        /* 数据指标卡片 */
        .metrics-bar {
            background-color: var(--bg-secondary);
            border-bottom: 3px solid var(--border-color);
            padding: 40px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
        }
        .metric-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 24px;
            box-shadow: var(--card-shadow);
            text-align: center;
            transition: transform 0.2s;
        }
        .metric-card:hover {
            transform: translateY(-5px);
        }
        .metric-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
        }
        .metric-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 700;
        }

        /* 通用区块样式 */
        section {
            padding: 80px 0;
            border-bottom: 3px solid var(--border-color);
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 900;
            display: inline-block;
            position: relative;
            margin-bottom: 15px;
            z-index: 1;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 5px;
            left: 0;
            width: 100%;
            height: 12px;
            background-color: var(--accent-yellow);
            z-index: -1;
            transform: skewX(-15deg);
        }
        .section-subtitle {
            color: var(--text-muted);
            font-weight: 600;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 平台介绍 & 关于我们 */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .intro-content h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 20px;
        }
        .intro-content p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }
        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-item {
            background-color: var(--bg-primary);
            border: 2px solid var(--border-color);
            padding: 6px 12px;
            font-weight: 700;
            font-size: 0.85rem;
            box-shadow: 2px 2px 0 var(--border-color);
        }
        .intro-showcase {
            background-color: var(--accent-pink);
            border: 4px solid var(--border-color);
            box-shadow: var(--card-shadow);
            padding: 40px;
            color: #ffffff;
            border-radius: 4px;
        }
        .showcase-item {
            border-bottom: 2px dashed rgba(255, 255, 255, 0.4);
            padding: 15px 0;
        }
        .showcase-item:last-child {
            border-bottom: none;
        }
        .showcase-title {
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .showcase-desc {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        /* 服务能力 & 一站式制作 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .service-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 30px;
            box-shadow: var(--card-shadow);
            position: relative;
            transition: transform 0.2s;
        }
        .service-card:hover {
            transform: translateY(-5px);
        }
        .service-icon {
            font-size: 2rem;
            margin-bottom: 20px;
            display: inline-block;
            padding: 10px;
            background-color: var(--bg-primary);
            border: 2px solid var(--border-color);
            box-shadow: 2px 2px 0 var(--border-color);
        }
        .service-card h3 {
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 流程步骤 */
        .steps-wrapper {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            position: relative;
        }
        .step-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 30px 20px;
            position: relative;
            box-shadow: var(--card-shadow);
            text-align: center;
        }
        .step-num {
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--accent-yellow);
            border: 3px solid var(--border-color);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            box-shadow: 2px 2px 0 var(--border-color);
        }
        .step-card h4 {
            margin-top: 15px;
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 培训版块 */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .training-box {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 40px;
            box-shadow: var(--card-shadow);
        }
        .training-box h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 25px;
            border-bottom: 3px solid var(--border-color);
            padding-bottom: 10px;
            color: var(--primary);
        }
        .course-list {
            list-style: none;
        }
        .course-item {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px dashed #e2e8f0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .course-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        .course-info h4 {
            font-weight: 800;
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .course-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .course-badge {
            background-color: var(--accent-green);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 8px;
            border: 1px solid var(--border-color);
            box-shadow: 1px 1px 0 var(--border-color);
        }

        /* 对比评测 */
        .compare-wrap {
            overflow-x: auto;
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            text-align: left;
            min-width: 600px;
        }
        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border: 2px solid var(--border-color);
            font-weight: 700;
        }
        .compare-table th {
            background-color: var(--bg-primary);
        }
        .compare-table tr:hover {
            background-color: #f1f5f9;
        }
        .highlight-col {
            background-color: #eff6ff;
            color: var(--primary);
        }
        .score-badge {
            background-color: var(--accent-yellow);
            color: var(--text-main);
            padding: 4px 10px;
            border: 2px solid var(--border-color);
            font-size: 0.9rem;
            font-weight: 900;
            box-shadow: 2px 2px 0 var(--border-color);
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .token-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 24px;
            box-shadow: var(--card-shadow);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .token-name {
            font-weight: 800;
            font-size: 1.1rem;
        }
        .token-details {
            text-align: right;
        }
        .token-price {
            font-size: 1.2rem;
            font-weight: 900;
            color: var(--accent-pink);
        }
        .token-unit {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 案例中心 (非首屏，使用指定宣传图及素材图) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .case-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .case-img-wrap {
            border-bottom: 3px solid var(--border-color);
            overflow: hidden;
            background-color: #e2e8f0;
            aspect-ratio: 16 / 9;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s;
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.05);
        }
        .case-info {
            padding: 24px;
            flex-grow: 1;
        }
        .case-tag {
            display: inline-block;
            background-color: var(--bg-primary);
            border: 2px solid var(--border-color);
            padding: 2px 8px;
            font-size: 0.75rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .case-info h4 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .case-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 评论板块 (6条评论) */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .review-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 24px;
            box-shadow: var(--card-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-main);
            font-weight: 600;
            margin-bottom: 20px;
            line-height: 1.5;
            position: relative;
        }
        .review-text::before {
            content: "“";
            font-size: 3rem;
            color: rgba(37, 99, 235, 0.15);
            position: absolute;
            top: -20px;
            left: -10px;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 2px dashed #e2e8f0;
            padding-top: 15px;
        }
        .author-avatar {
            width: 40px;
            height: 40px;
            border: 2px solid var(--border-color);
            background-color: var(--accent-yellow);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
        }
        .author-info h5 {
            font-weight: 800;
            font-size: 0.95rem;
        }
        .author-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAQ 手风琴 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            margin-bottom: 15px;
            box-shadow: 4px 4px 0 var(--border-color);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease-out, padding 0.2s ease-out;
            font-size: 0.95rem;
            color: var(--text-muted);
            border-top: 0 solid var(--border-color);
        }
        .faq-item.active .faq-answer {
            padding: 20px 24px;
            border-top: 3px solid var(--border-color);
        }
        .faq-icon {
            font-size: 1.3rem;
            transition: transform 0.2s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* 自助排查 & 术语百科 */
        .kb-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
        }
        .kb-box {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 35px;
            box-shadow: var(--card-shadow);
        }
        .kb-box h3 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--text-main);
        }
        .kb-list {
            list-style: none;
        }
        .kb-item {
            margin-bottom: 15px;
        }
        .kb-item h4 {
            font-size: 1.05rem;
            font-weight: 800;
            margin-bottom: 5px;
            color: var(--primary);
        }
        .kb-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 资讯 & 最新文章 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .news-card {
            border: 3px solid var(--border-color);
            background-color: var(--bg-secondary);
            padding: 20px;
            box-shadow: var(--card-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .news-card h4 {
            font-size: 1.05rem;
            font-weight: 800;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 15px;
        }
        .news-card a:hover {
            text-decoration: underline;
        }

        /* 联系我们 & 加盟代理表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }
        .contact-info {
            background-color: var(--bg-secondary);
            border: 3px solid var(--border-color);
            padding: 40px;
            box-shadow: var(--card-shadow);
        }
        .contact-info h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 25px;
        }
        .contact-detail-item {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }
        .contact-detail-icon {
            font-size: 1.2rem;
            color: var(--primary);
            background-color: var(--bg-primary);
            border: 2px solid var(--border-color);
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 2px 2px 0 var(--border-color);
            flex-shrink: 0;
        }
        .contact-detail-text h4 {
            font-weight: 800;
            font-size: 0.95rem;
        }
        .contact-detail-text p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .qr-area {
            margin-top: 30px;
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 15px;
            border: 2px dashed var(--border-color);
            background-color: #fef08a;
        }
        .qr-area img {
            width: 80px;
            height: 80px;
            border: 2px solid var(--border-color);
        }
        .qr-text {
            font-size: 0.85rem;
            font-weight: 700;
        }

        /* 表单样式 */
        .form-box {
            background-color: var(--bg-secondary);
            border: 3px solid var(--border-color);
            padding: 40px;
            box-shadow: var(--card-shadow);
        }
        .form-box h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 25px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            font-weight: 800;
            margin-bottom: 8px;
            font-size: 0.9rem;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            font-size: 0.95rem;
            border: 3px solid var(--border-color);
            background-color: var(--bg-primary);
            font-weight: 600;
            outline: none;
            transition: box-shadow 0.2s;
        }
        .form-control:focus {
            box-shadow: 3px 3px 0 var(--border-color);
        }
        textarea.form-control {
            height: 100px;
            resize: vertical;
        }
        .form-submit {
            width: 100%;
            padding: 14px;
            font-size: 1rem;
            font-weight: 900;
            color: #ffffff;
            background-color: var(--primary);
            border: 3px solid var(--border-color);
            box-shadow: 4px 4px 0 var(--border-color);
            cursor: pointer;
            transition: transform 0.1s, box-shadow 0.1s;
        }
        .form-submit:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0 var(--border-color);
        }

        /* 页脚 */
        footer {
            background-color: var(--text-main);
            color: #ffffff;
            padding: 60px 0 20px;
            border-top: 3px solid var(--border-color);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h4 {
            font-size: 1.4rem;
            font-weight: 900;
            margin-bottom: 15px;
            color: var(--accent-yellow);
        }
        .footer-brand p {
            font-size: 0.85rem;
            opacity: 0.8;
            line-height: 1.6;
        }
        .footer-links h5 {
            font-size: 1.05rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: #ffffff;
            position: relative;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links ul li {
            margin-bottom: 10px;
        }
        .footer-links ul li a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.2s;
        }
        .footer-links ul li a:hover {
            color: var(--accent-yellow);
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .friend-links a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.8rem;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 4px 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: background-color 0.2s, color 0.2s;
        }
        .friend-links a:hover {
            background-color: var(--primary);
            color: #ffffff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.8rem;
            color: #94a3b8;
        }

        /* 浮动客服入口 */
        .floating-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--bg-secondary);
            border: 3px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 4px 4px 0 var(--border-color);
            transition: transform 0.1s, box-shadow 0.1s;
            position: relative;
        }
        .float-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0 var(--border-color);
        }
        .float-btn-wechat:hover .float-qr-popup {
            opacity: 1;
            visibility: visible;
        }
        .float-qr-popup {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--bg-secondary);
            border: 3px solid var(--border-color);
            padding: 12px;
            box-shadow: var(--card-shadow);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.2s, visibility 0.2s;
            text-align: center;
            width: 140px;
        }
        .float-qr-popup img {
            width: 100%;
            height: auto;
            margin-bottom: 5px;
        }
        .float-qr-popup p {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--text-main);
        }
        .scroll-top-btn {
            background-color: var(--accent-yellow);
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .intro-grid, .training-grid, .kb-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-secondary);
                border-bottom: 3px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1.05rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }