/* ---------- 全局重置与变量 ---------- */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --primary: #0057ff;
      --primary-light: #e8f0ff;
      --accent: #ff6b2b;
      --accent-light: #fff1eb;
      --dark: #0b1a2f;
      --text: #1e2a3a;
      --text-light: #5a6b7c;
      --bg: #ffffff;
      --bg-soft: #f7f9fc;
      --card: #ffffff;
      --border: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(0, 87, 255, 0.06);
      --shadow-md: 0 8px 28px rgba(0, 40, 100, 0.08);
      --shadow-lg: 0 18px 48px rgba(0, 40, 100, 0.12);
      --radius: 18px;
      --radius-sm: 12px;
      --radius-btn: 40px;
      --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --container: 1200px;
      --gap: 1.5rem;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font);
      background-color: var(--bg-soft);
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 87, 255, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 60%, rgba(255, 107, 43, 0.04) 0%, transparent 40%);
      background-attachment: fixed;
      color: var(--text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    ul {
      list-style: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    h1, h2, h3, h4 {
      color: var(--dark);
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    h2 {
      font-size: 2.2rem;
      margin-bottom: 0.6rem;
    }
    h3 {
      font-size: 1.3rem;
      margin-bottom: 0.5rem;
    }
    .section-sub {
      color: var(--text-light);
      font-size: 1.05rem;
      max-width: 680px;
      margin-bottom: 2.5rem;
    }
    .section {
      padding: 5rem 0;
      position: relative;
    }
    .section:nth-child(even) {
      background-color: rgba(255, 255, 255, 0.5);
      backdrop-filter: blur(2px);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.85rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.25s ease;
      border: 2px solid transparent;
      cursor: pointer;
      line-height: 1.2;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 6px 18px rgba(0, 87, 255, 0.25);
    }
    .btn-primary:hover {
      background: #0041cc;
      transform: translateY(-3px);
      box-shadow: 0 10px 28px rgba(0, 87, 255, 0.35);
    }
    .btn-outline {
      background: #fff;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 6px 18px rgba(255, 107, 43, 0.25);
    }
    .btn-accent:hover {
      background: #e55a1e;
      transform: translateY(-3px);
      box-shadow: 0 10px 28px rgba(255, 107, 43, 0.35);
    }
    .badge {
      display: inline-block;
      padding: 0.3rem 0.9rem;
      border-radius: 50px;
      font-size: 0.8rem;
      font-weight: 600;
      background: var(--primary-light);
      color: var(--primary);
      margin-bottom: 0.8rem;
    }
    /* 滚动渐入 */
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ---------- 顶部导航 ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.04);
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.02);
      transition: background 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1.5rem;
      padding-top: 0.75rem;
      padding-bottom: 0.75rem;
      flex-wrap: wrap;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      flex-shrink: 0;
    }
    .ai-page-logo {
      max-height: 38px;
      width: auto;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.02em;
    }
    .brand-name span {
      color: var(--primary);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 0.5rem 0.75rem;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text);
      border-radius: 8px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      flex-shrink: 0;
    }
    .nav-actions .btn {
      padding: 0.55rem 1.4rem;
      font-size: 0.9rem;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--dark);
      cursor: pointer;
      padding: 0.2rem 0.5rem;
      border-radius: 8px;
    }
    .menu-toggle:hover {
      background: var(--primary-light);
    }

    /* ---------- Hero 首屏（无图片） ---------- */
    .hero {
      padding: 5rem 0 4rem;
      position: relative;
      overflow: hidden;
      background: linear-gradient(145deg, #f0f6ff 0%, #ffffff 45%, #fef4ee 100%);
      border-bottom: 1px solid rgba(0, 87, 255, 0.06);
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -20%;
      right: -5%;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(0, 87, 255, 0.08) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -10%;
      left: -5%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(255, 107, 43, 0.06) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 1.5rem;
    }
    .hero h1 {
      font-size: clamp(2rem, 5vw, 3.4rem);
      font-weight: 800;
      line-height: 1.2;
      max-width: 900px;
      letter-spacing: -0.03em;
    }
    .hero h1 em {
      font-style: normal;
      color: var(--primary);
      background: linear-gradient(135deg, var(--primary), #4d8aff);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-light);
      max-width: 700px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 1rem;
      margin-top: 0.5rem;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1.5rem 3rem;
      margin-top: 2rem;
      padding: 1.5rem 2rem;
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(10px);
      border-radius: 100px;
      border: 1px solid rgba(0, 87, 255, 0.12);
      box-shadow: var(--shadow-sm);
    }
    .hero-stat-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.2rem;
    }
    .hero-stat-item strong {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .hero-stat-item span {
      font-size: 0.82rem;
      color: var(--text-light);
      white-space: nowrap;
    }
    /* 首屏装饰几何元素 */
    .hero-deco {
      position: absolute;
      z-index: 1;
      pointer-events: none;
    }
    .deco-circle {
      width: 280px;
      height: 280px;
      border: 2px dashed rgba(0, 87, 255, 0.12);
      border-radius: 50%;
      top: 10%;
      right: 3%;
      animation: spinSlow 30s linear infinite;
    }
    .deco-square {
      width: 120px;
      height: 120px;
      background: linear-gradient(135deg, rgba(0,87,255,0.06), rgba(255,107,43,0.06));
      border-radius: 24px;
      bottom: 8%;
      left: 5%;
      transform: rotate(18deg);
      animation: floatY 6s ease-in-out infinite;
    }
    @keyframes spinSlow {
      to { transform: rotate(360deg); }
    }
    @keyframes floatY {
      0%, 100% { transform: translateY(0) rotate(18deg); }
      50% { transform: translateY(-18px) rotate(22deg); }
    }

    /* ---------- 数据指标卡片 ---------- */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
    }
    .metric-card {
      background: var(--card);
      border-radius: var(--radius-sm);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border);
      transition: transform 0.25s, box-shadow 0.25s;
      text-align: center;
    }
    .metric-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .metric-card .icon {
      font-size: 2rem;
      margin-bottom: 0.6rem;
      display: block;
    }
    .metric-card strong {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      display: block;
      line-height: 1.2;
    }
    .metric-card p {
      color: var(--text-light);
      font-size: 0.92rem;
    }

    /* ---------- 服务能力卡片 ---------- */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
    }
    .service-card {
      background: var(--card);
      border-radius: var(--radius);
      padding: 2rem 1.8rem;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 87, 255, 0.2);
    }
    .service-icon {
      font-size: 2.2rem;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      border-radius: 14px;
    }
    .service-card h3 {
      font-size: 1.2rem;
      margin: 0;
    }
    .service-card p {
      color: var(--text-light);
      font-size: 0.95rem;
      flex: 1;
    }
    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
      margin-top: 0.4rem;
    }
    .tag {
      display: inline-block;
      padding: 0.2rem 0.7rem;
      background: var(--bg-soft);
      color: var(--text);
      border-radius: 50px;
      font-size: 0.75rem;
      border: 1px solid var(--border);
      transition: background 0.2s;
    }
    .tag:hover {
      background: var(--primary-light);
      border-color: var(--primary);
    }

    /* ---------- 流程步骤 ---------- */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 1.2rem;
      counter-reset: step;
    }
    .step-card {
      background: var(--card);
      border-radius: var(--radius-sm);
      padding: 1.8rem 1.2rem;
      border: 1px solid var(--border);
      text-align: center;
      position: relative;
      transition: transform 0.25s;
      counter-increment: step;
    }
    .step-card::before {
      content: counter(step, decimal-leading-zero);
      display: block;
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      opacity: 0.25;
      margin-bottom: 0.5rem;
      line-height: 1;
    }
    .step-card h4 {
      font-size: 1rem;
      margin-bottom: 0.4rem;
    }
    .step-card p {
      font-size: 0.85rem;
      color: var(--text-light);
    }
    .step-card:hover {
      transform: translateY(-4px);
    }

    /* ---------- 对比表格 ---------- */
    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius);
      background: var(--card);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
      font-size: 0.95rem;
    }
    .compare-table th,
    .compare-table td {
      padding: 1rem 1.2rem;
      text-align: left;
      border-bottom: 1px solid var(--border);
    }
    .compare-table th {
      background: var(--primary-light);
      font-weight: 700;
      color: var(--dark);
      font-size: 0.9rem;
      white-space: nowrap;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td:first-child {
      font-weight: 600;
      color: var(--dark);
    }
    .highlight {
      color: var(--primary);
      font-weight: 700;
    }
    .rating {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      color: var(--accent);
      font-weight: 700;
    }
    .score-box {
      background: var(--primary-light);
      border-radius: var(--radius-sm);
      padding: 0.6rem 1.2rem;
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 1.5rem;
    }
    .score-box span {
      font-size: 1.6rem;
      line-height: 1;
    }

    /* ---------- 用户评论 ---------- */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
    }
    .review-card {
      background: var(--card);
      border-radius: var(--radius);
      padding: 1.8rem;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #f5b342;
      font-size: 1rem;
      letter-spacing: 2px;
    }
    .review-text {
      color: var(--text);
      font-size: 0.95rem;
      flex: 1;
      line-height: 1.7;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      border-top: 1px solid var(--border);
      padding-top: 1rem;
    }
    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #5b9aff);
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .review-author strong {
      font-size: 0.92rem;
      display: block;
      color: var(--dark);
    }
    .review-author span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* ---------- 案例展示 ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 1.5rem;
    }
    .case-card {
      background: var(--card);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .case-media {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: var(--bg-soft);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-body {
      padding: 1.2rem 1.2rem 1.5rem;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
    }
    .case-body h4 {
      font-size: 1.05rem;
    }
    .case-body p {
      color: var(--text-light);
      font-size: 0.88rem;
      flex: 1;
    }
    .case-tag {
      font-size: 0.72rem;
      color: var(--primary);
      background: var(--primary-light);
      padding: 0.15rem 0.7rem;
      border-radius: 50px;
      align-self: flex-start;
      font-weight: 600;
    }

    /* ---------- 文章列表 ---------- */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1rem 1.4rem;
      background: var(--card);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      transition: all 0.2s;
    }
    .article-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
      box-shadow: var(--shadow-sm);
    }
    .article-item span {
      font-size: 0.92rem;
      color: var(--text);
    }
    .article-item .arrow {
      color: var(--primary);
      font-weight: 700;
      flex-shrink: 0;
    }

    /* ---------- Token比价 ---------- */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 1.2rem;
    }
    .token-card {
      background: var(--card);
      border-radius: var(--radius-sm);
      padding: 1.5rem;
      border: 1px solid var(--border);
      transition: transform 0.25s;
    }
    .token-card:hover {
      transform: translateY(-4px);
    }
    .token-card .model-name {
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 0.4rem;
    }
    .token-price {
      color: var(--primary);
      font-weight: 800;
      font-size: 1.5rem;
      line-height: 1.2;
    }
    .token-price small {
      font-size: 0.8rem;
      font-weight: 400;
      color: var(--text-light);
    }
    .token-original {
      font-size: 0.82rem;
      color: var(--text-light);
      text-decoration: line-through;
    }

    /* ---------- FAQ ---------- */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }
    .faq-item {
      background: var(--card);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item:hover {
      border-color: rgba(0, 87, 255, 0.3);
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 1.2rem 1.4rem;
      font-size: 1rem;
      font-weight: 600;
      color: var(--dark);
      text-align: left;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      cursor: pointer;
      font-family: var(--font);
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: var(--bg-soft);
    }
    .faq-question .icon-faq {
      font-size: 1.3rem;
      color: var(--primary);
      transition: transform 0.3s;
      flex-shrink: 0;
    }
    .faq-item.active .icon-faq {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 1.4rem;
      color: var(--text-light);
      font-size: 0.95rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 1.4rem 1.4rem;
    }

    /* ---------- 表单 ---------- */
    .form-box {
      background: var(--card);
      border-radius: var(--radius);
      padding: 2.5rem 2rem;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      max-width: 720px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.2rem;
    }
    .form-full {
      grid-column: 1 / -1;
    }
    .form-field {
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
    }
    .form-field label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text);
    }
    .form-field input,
    .form-field select,
    .form-field textarea {
      width: 100%;
      padding: 0.85rem 1rem;
      border-radius: 12px;
      border: 1.5px solid var(--border);
      font-family: var(--font);
      font-size: 0.95rem;
      color: var(--text);
      background: #fafcff;
      transition: border-color 0.2s, box-shadow 0.2s;
      outline: none;
    }
    .form-field input:focus,
    .form-field select:focus,
    .form-field textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(0, 87, 255, 0.08);
    }
    .form-field textarea {
      resize: vertical;
      min-height: 110px;
    }
    .form-submit {
      margin-top: 0.4rem;
    }
    .form-submit .btn {
      width: 100%;
    }

    /* ---------- 标签云 ---------- */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
    }
    .tag-cloud a {
      display: inline-block;
      padding: 0.4rem 1rem;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 50px;
      font-size: 0.85rem;
      color: var(--text);
      transition: all 0.2s;
    }
    .tag-cloud a:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* ---------- 底部 ---------- */
    .site-footer {
      background: #0b1a2f;
      color: #b8c7dd;
      padding: 3.5rem 0 1.5rem;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 2rem;
      margin-bottom: 2.5rem;
    }
    .footer-brand h3 {
      color: #fff;
      font-size: 1.3rem;
      margin-bottom: 0.6rem;
    }
    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.7;
      color: #98aec9;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 0.95rem;
      margin-bottom: 0.8rem;
      font-weight: 600;
    }
    .footer-col ul li {
      margin-bottom: 0.5rem;
    }
    .footer-col ul li a {
      color: #b8c7dd;
      font-size: 0.88rem;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: #fff;
    }
    .footer-contact p {
      font-size: 0.88rem;
      margin-bottom: 0.4rem;
    }
    .footer-contact a {
      color: #b8c7dd;
    }
    .footer-contact a:hover {
      color: #fff;
    }
    .footer-qr {
      margin-top: 0.8rem;
    }
    .footer-qr img {
      width: 110px;
      border-radius: 8px;
      border: 2px solid rgba(255, 255, 255, 0.15);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 1.5rem;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      font-size: 0.82rem;
      color: #8a9db8;
    }
    .footer-links-inline {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }
    .footer-links-inline a {
      color: #8a9db8;
      transition: color 0.2s;
    }
    .footer-links-inline a:hover {
      color: #fff;
    }

    /* ---------- 浮动客服 & 返回顶部 ---------- */
    .floating-actions {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }
    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      border: none;
      cursor: pointer;
      box-shadow: var(--shadow-md);
      transition: all 0.25s;
      text-decoration: none;
      background: #fff;
      color: var(--primary);
      border: 1px solid var(--border);
    }
    .float-btn:hover {
      transform: translateY(-4px) scale(1.05);
      box-shadow: var(--shadow-lg);
    }
    .float-btn.primary {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }
    .float-btn.accent {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }

    /* ---------- 响应式 ---------- */
    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 860px) {
      .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0;
        padding: 0.5rem 0;
        order: 10;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 0.7rem 1rem;
        border-bottom: 1px solid var(--border);
      }
      .menu-toggle {
        display: block;
      }
      .nav-actions .btn-secondary {
        display: none;
      }
      .hero-stats {
        border-radius: 24px;
        padding: 1.2rem 1rem;
        gap: 1rem 1.5rem;
      }
      .hero h1 {
        font-size: 1.9rem;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 640px) {
      .section {
        padding: 3.5rem 0;
      }
      h2 {
        font-size: 1.7rem;
      }
      .hero {
        padding: 3rem 0 2.5rem;
      }
      .hero-buttons {
        flex-direction: column;
        width: 100%;
      }
      .hero-buttons .btn {
        width: 100%;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.8rem;
      }
      .metrics-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-stat-item strong {
        font-size: 1.2rem;
      }
      .hero-stat-item span {
        font-size: 0.72rem;
      }
      .score-box {
        flex-wrap: wrap;
      }
    }
    @media (max-width: 400px) {
      .metrics-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 减少动态 */
    @media (prefers-reduced-motion: reduce) {
      * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
      .reveal {
        opacity: 1;
        transform: none;
      }
    }