:root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --rainbow-blue: #2563eb;
      --rainbow-purple: #7c3aed;
      --rainbow-pink: #ec4899;
      --rainbow-amber: #f59e0b;
      --rainbow-emerald: #10b981;
      --rainbow-gradient: linear-gradient(135deg, #2563eb, #7c3aed, #ec4899, #f59e0b);
      --rainbow-soft: linear-gradient(135deg, #eff6ff 0%, #faf5ff 33%, #fdf2f8 66%, #fffbeb 100%);
      --bg-page: #f8fafc;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-sub: #334155;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
      --shadow-rainbow: 0 10px 25px -5px rgba(124, 58, 237, 0.15);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      position: relative;
      overflow-x: hidden;
      min-height: 100vh;
    }

    /* 全局统一容器 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部彩虹装饰条 */
    .rainbow-top-bar {
      height: 4px;
      background: var(--rainbow-gradient);
      width: 100%;
      position: fixed;
      top: 0;
      left: 0;
      z-index: 1001;
    }

    /* 导航栏 */
    header.site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 4px;
      z-index: 1000;
      box-shadow: var(--shadow-sm);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .brand-title {
      font-size: 1.3rem;
      font-weight: 800;
      background: var(--rainbow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links li {
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      color: var(--text-sub);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
      display: inline-block;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-nav-primary {
      background: var(--rainbow-gradient);
      color: #ffffff !important;
      font-weight: 600;
      padding: 9px 18px !important;
      border-radius: 9999px !important;
      box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
      transition: transform 0.2s ease, box-shadow 0.2s ease !important;
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(124, 58, 237, 0.35);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 8px 10px;
      font-size: 1.2rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 区域通用样式 */
    section.section-block {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background: #ffffff;
      border-top: 1px solid #f1f5f9;
      border-bottom: 1px solid #f1f5f9;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: #eff6ff;
      border: 1px solid #dbeafe;
      color: var(--rainbow-blue);
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
    }

    /* Hero 首屏 (严格无图片) */
    .hero-section {
      padding: 70px 0 60px 0;
      background: var(--rainbow-soft);
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-glow-1 {
      position: absolute;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(124, 58, 237, 0.12) 0%, rgba(255,255,255,0) 70%);
      top: -100px;
      left: -100px;
      pointer-events: none;
    }

    .hero-glow-2 {
      position: absolute;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, rgba(255,255,255,0) 70%);
      bottom: -100px;
      right: -100px;
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
      position: relative;
      z-index: 10;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid rgba(124, 58, 237, 0.2);
      border-radius: 9999px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
    }

    .hero-tag span.dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--rainbow-emerald);
      display: inline-block;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
    }

    .hero-h1 {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1 span.gradient-text {
      background: var(--rainbow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-sub);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--rainbow-gradient);
      color: #ffffff;
      text-decoration: none;
      font-size: 1.1rem;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 9999px;
      box-shadow: 0 10px 25px -3px rgba(79, 70, 229, 0.4);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-hero-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 28px -2px rgba(79, 70, 229, 0.5);
    }

    .btn-hero-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      text-decoration: none;
      font-size: 1.05rem;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: 9999px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .btn-hero-outline:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
      color: var(--primary);
    }

    /* 亮点指标条 */
    .hero-stat-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 10px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px 12px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .stat-num {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 2px;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台矩阵标签云 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-sub);
      transition: all 0.2s ease;
      box-shadow: 0 1px 2px rgba(0,0,0,0.03);
    }

    .model-pill:hover {
      border-color: var(--rainbow-purple);
      color: var(--rainbow-purple);
      transform: translateY(-2px);
    }

    /* 场景与能力网格 */
    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--rainbow-gradient);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--rainbow-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 14px;
    }

    .card-tag {
      font-size: 0.75rem;
      background: #f1f5f9;
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 素材案例画廊 */
    .media-case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease;
    }

    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .media-img-wrap {
      width: 100%;
      background: #f8fafc;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.03);
    }

    .media-info {
      padding: 16px;
    }

    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    /* 对比评测板块 (要求 5星, 9.9分) */
    .rating-banner {
      background: #ffffff;
      border: 2px solid #ede9fe;
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: var(--shadow-rainbow);
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-circle {
      width: 84px;
      height: 84px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      font-weight: 900;
      line-height: 1;
      box-shadow: 0 6px 16px rgba(124, 58, 237, 0.3);
    }

    .score-circle small {
      font-size: 0.75rem;
      opacity: 0.9;
    }

    .rating-meta h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stars-box {
      color: #f59e0b;
      font-size: 1.2rem;
      margin-bottom: 4px;
    }

    .rating-desc {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    .rating-badges {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .rating-pill {
      background: #f5f3ff;
      border: 1px solid #ddd6fe;
      color: var(--rainbow-purple);
      padding: 6px 14px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
    }

    /* 对比表格 */
    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table tr:last-child td {
      border-bottom: none;
    }

    .eval-table .highlight-col {
      background: #faf5ff;
      font-weight: 700;
      color: var(--primary);
    }

    .tag-check {
      color: #10b981;
      font-weight: 700;
    }

    /* 流程步骤 */
    .step-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      font-size: 1rem;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-text {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 用户评论 (6条) */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: normal;
    }

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      flex-shrink: 0;
    }

    .review-user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-user-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 (不少于 10 条) */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 20px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: background 0.2s ease;
    }

    .faq-question:hover {
      background: #f8fafc;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 20px;
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.65;
      background: #ffffff;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 20px 18px 20px;
    }

    /* 表单与联系板块 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-side {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      color: var(--primary);
      flex-shrink: 0;
    }

    .contact-meta-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .contact-meta-val {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .qr-showcase {
      margin-top: 10px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-showcase img {
      width: 90px;
      height: 90px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      border: 1px solid #cbd5e1;
    }

    .qr-desc h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .qr-desc p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    .form-wrapper form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      background: #f8fafc;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    .btn-form-submit {
      background: var(--rainbow-gradient);
      color: #ffffff;
      border: none;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-form-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
    }

    /* 资讯与友情链接 */
    .article-links-wrap, .friendly-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .article-tag-item {
      display: inline-block;
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      font-size: 0.85rem;
      color: var(--text-sub);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    .article-tag-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }

    .friendly-links-wrap a {
      color: var(--text-sub);
      font-size: 0.9rem;
      text-decoration: none;
      padding: 4px 10px;
      border-radius: 4px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }

    .friendly-links-wrap a:hover {
      color: var(--primary);
      border-color: var(--primary);
    }

    /* 页脚 */
    footer.site-footer {
      background: #0f172a;
      color: #f8fafc;
      padding: 50px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

    .footer-content-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      color: #94a3b8;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
      color: #64748b;
    }

    .footer-bottom a {
      color: #94a3b8;
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: #ffffff;
    }

    /* 浮动客服 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      text-decoration: none;
      font-size: 1.2rem;
      transition: transform 0.2s ease;
      border: none;
    }

    .float-btn:hover {
      transform: scale(1.08);
    }

    .float-qr-card {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      text-align: center;
      width: 140px;
    }

    .float-qr-card img {
      width: 116px;
      height: 116px;
      object-fit: cover;
      border-radius: 4px;
    }

    .float-qr-card span {
      font-size: 0.75rem;
      color: var(--text-main);
      font-weight: 600;
      display: block;
      margin-top: 6px;
    }

    .floating-kefu:hover .float-qr-card {
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .feature-grid-3, .media-case-grid, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-content-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        gap: 8px;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 14px;
      }
      .hero-stat-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .feature-grid-3, .media-case-grid, .review-grid, .step-grid-4 {
        grid-template-columns: 1fr;
      }
      .footer-content-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 1.75rem;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
      }
      .rating-score-box {
        flex-direction: column;
      }
      .rating-badges {
        justify-content: center;
      }
    }