* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --bg: #fff9f0;
      --bg-soft: #fff4e8;
      --card-bg: #ffffff;
      --text: #2d2a3e;
      --text-light: #5f5a72;
      --primary: #ff6b6b;
      --primary-soft: #ffe3e0;
      --secondary: #5f7cff;
      --accent: #ffcc4d;
      --accent-soft: #fff2cf;
      --mint: #6fd9c7;
      --mint-soft: #e2f8f4;
      --border: #f0e7dd;
      --shadow-sm: 0 4px 14px rgba(45, 42, 62, 0.06);
      --shadow-md: 0 12px 32px rgba(45, 42, 62, 0.09);
      --shadow-lg: 0 24px 56px rgba(45, 42, 62, 0.12);
      --radius: 20px;
      --radius-sm: 14px;
      --container: 1180px;
      --transition: 0.25s ease;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul {
      list-style: none;
    }
    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ---------- 导航 ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 249, 240, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 70px;
      gap: 16px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand .ai-page-logo {
      width: 120px;
      height: auto;
    }
    .brand-home {
      font-size: 13px;
      color: var(--text-light);
      padding: 4px 10px;
      border-radius: 999px;
      background: var(--accent-soft);
      font-weight: 500;
      transition: var(--transition);
    }
    .brand-home:hover {
      background: var(--accent);
      color: var(--text);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      font-size: 14px;
      color: var(--text-light);
      padding: 8px 12px;
      border-radius: 10px;
      font-weight: 500;
      white-space: nowrap;
      transition: var(--transition);
    }
    .nav-links a:hover {
      color: var(--primary);
      background: var(--primary-soft);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #fff !important;
      padding: 10px 22px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 6px 18px rgba(255, 107, 107, 0.32);
      transition: var(--transition);
      flex-shrink: 0;
    }
    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 26px rgba(255, 107, 107, 0.42);
      background: #ff5252;
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 42px;
      height: 42px;
      border: 1px solid var(--border);
      border-radius: 12px;
      background: #fff;
      cursor: pointer;
      padding: 10px;
    }
    .menu-toggle span {
      display: block;
      height: 2px;
      border-radius: 2px;
      background: var(--text);
      transition: var(--transition);
    }
    .mobile-nav {
      display: none;
      flex-direction: column;
      gap: 4px;
      padding: 12px 0 18px;
    }
    .mobile-nav a {
      padding: 10px 14px;
      border-radius: 12px;
      font-size: 15px;
      color: var(--text);
      transition: var(--transition);
    }
    .mobile-nav a:hover {
      background: var(--primary-soft);
    }
    .mobile-nav.open {
      display: flex;
    }

    /* ---------- 通用按钮 ---------- */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 30px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      border: none;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, #ff7a7a, #ff5c5c);
      color: #fff;
      box-shadow: 0 10px 24px rgba(255, 92, 92, 0.32);
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 16px 34px rgba(255, 92, 92, 0.42);
    }
    .btn-outline {
      background: #fff;
      color: var(--text);
      border: 1.5px solid var(--border);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }
    .btn-soft {
      background: var(--accent-soft);
      color: #7a5b00;
    }
    .btn-soft:hover {
      background: var(--accent);
      color: var(--text);
      transform: translateY(-2px);
    }

    /* ---------- Hero ---------- */
    .hero {
      position: relative;
      padding: 72px 0 88px;
      overflow: hidden;
      background:
        radial-gradient(ellipse at 12% 18%, rgba(255, 204, 77, 0.28), transparent 55%),
        radial-gradient(ellipse at 86% 8%, rgba(95, 124, 255, 0.16), transparent 50%),
        radial-gradient(ellipse at 72% 88%, rgba(111, 217, 199, 0.18), transparent 55%),
        linear-gradient(180deg, #fff9f0 0%, #fff3e6 100%);
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 380px;
      height: 380px;
      border-radius: 50%;
      background: linear-gradient(135deg, rgba(255, 107, 107, 0.12), rgba(255, 204, 77, 0.16));
      top: -130px;
      right: -100px;
      animation: floatBlob 9s ease-in-out infinite;
    }
    .hero::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: linear-gradient(135deg, rgba(111, 217, 199, 0.14), rgba(95, 124, 255, 0.1));
      bottom: -90px;
      left: -80px;
      animation: floatBlob 11s ease-in-out infinite reverse;
    }
    @keyframes floatBlob {
      0%, 100% { transform: translate(0, 0) scale(1); }
      50% { transform: translate(16px, -18px) scale(1.05); }
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      border: 1px solid var(--border);
      padding: 7px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 22px;
      animation: fadeUp 0.6s ease both;
    }
    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      animation: pulseDot 2s ease infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.8); }
    }
    .hero h1 {
      font-size: clamp(28px, 4.2vw, 46px);
      line-height: 1.24;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      animation: fadeUp 0.6s 0.08s ease both;
    }
    .hero h1 em {
      font-style: normal;
      background: linear-gradient(120deg, #ff6b6b 0%, #ff9f43 60%, #5f7cff 100%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 16.5px;
      color: var(--text-light);
      max-width: 560px;
      margin-bottom: 30px;
      animation: fadeUp 0.6s 0.16s ease both;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 32px;
      animation: fadeUp 0.6s 0.24s ease both;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      animation: fadeUp 0.6s 0.32s ease both;
    }
    .hero-tags span {
      font-size: 13px;
      color: var(--text-light);
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid var(--border);
      padding: 6px 14px;
      border-radius: 999px;
      transition: var(--transition);
    }
    .hero-tags span:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(22px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .hero-panel {
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(255, 255, 255, 0.9);
      border-radius: 28px;
      padding: 26px;
      box-shadow: var(--shadow-lg);
      backdrop-filter: blur(8px);
      animation: fadeUp 0.7s 0.2s ease both;
    }
    .hero-panel-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-light);
      letter-spacing: 0.4px;
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-panel-title::after {
      content: "";
      flex: 1;
      height: 1px;
      background: var(--border);
    }
    .hero-stats {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .hero-stat {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 16px 14px;
      transition: var(--transition);
    }
    .hero-stat:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .hero-stat strong {
      display: block;
      font-size: 24px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 4px;
    }
    .hero-stat span {
      font-size: 12.5px;
      color: var(--text-light);
    }
    .hero-model-list {
      margin-top: 16px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .hero-model-list span {
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 6px;
      background: var(--mint-soft);
      color: #1f7a6e;
      font-weight: 500;
    }

    /* ---------- 区块通用 ---------- */
    .section {
      padding: 72px 0;
    }
    .section-alt {
      background: var(--bg-soft);
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1.5px;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 5px 16px;
      border-radius: 999px;
      margin-bottom: 16px;
    }
    .section-head h2 {
      font-size: clamp(24px, 3.4vw, 34px);
      font-weight: 800;
      letter-spacing: -0.4px;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-head p {
      font-size: 15.5px;
      color: var(--text-light);
    }

    /* ---------- 关于 & 能力卡片 ---------- */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: stretch;
    }
    .about-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .about-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .about-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .about-card h3::before {
      content: "";
      width: 6px;
      height: 22px;
      border-radius: 3px;
      background: linear-gradient(180deg, var(--primary), var(--accent));
    }
    .about-card p {
      font-size: 15px;
      color: var(--text-light);
      margin-bottom: 12px;
    }
    .about-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
      margin-top: 6px;
    }
    .about-list li {
      font-size: 14.5px;
      color: var(--text-light);
      padding-left: 22px;
      position: relative;
    }
    .about-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--mint);
      font-weight: 800;
    }
    .cap-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 32px;
    }
    .cap-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 24px;
      transition: var(--transition);
    }
    .cap-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .cap-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 14px;
      background: var(--accent-soft);
      color: #a87a00;
    }
    .cap-card:nth-child(2) .cap-icon { background: var(--primary-soft); color: var(--primary); }
    .cap-card:nth-child(3) .cap-icon { background: var(--mint-soft); color: #1f7a6e; }
    .cap-card:nth-child(4) .cap-icon { background: #e8eaff; color: var(--secondary); }
    .cap-card:nth-child(5) .cap-icon { background: #ffeaf3; color: #d6336c; }
    .cap-card:nth-child(6) .cap-icon { background: #e6f7ef; color: #2b8a3e; }
    .cap-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .cap-card p {
      font-size: 13.5px;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* ---------- 场景标签云 ---------- */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 12px;
    }
    .tag-cloud span {
      font-size: 14px;
      padding: 9px 18px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--border);
      color: var(--text-light);
      transition: var(--transition);
      cursor: default;
    }
    .tag-cloud span:hover {
      background: var(--primary-soft);
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-3px) scale(1.03);
    }

    /* ---------- 流程步骤 ---------- */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }
    .step-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 22px;
      position: relative;
      transition: var(--transition);
    }
    .step-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #ff9f43);
      color: #fff;
      font-weight: 800;
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13.5px;
      color: var(--text-light);
    }

    /* ---------- 对比评测 ---------- */
    .review-layout {
      display: grid;
      grid-template-columns: 300px 1fr;
      gap: 28px;
      align-items: start;
    }
    .score-card {
      background: linear-gradient(160deg, #fff 0%, #fff4e8 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 30px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: sticky;
      top: 90px;
    }
    .score-card .score-big {
      font-size: 58px;
      font-weight: 900;
      line-height: 1;
      background: linear-gradient(135deg, #ff6b6b, #ff9f43);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }
    .score-card .score-label {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 14px;
    }
    .stars {
      display: flex;
      justify-content: center;
      gap: 4px;
      color: var(--accent);
      font-size: 20px;
      margin-bottom: 14px;
    }
    .score-card .rec {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      background: var(--mint-soft);
      color: #1f7a6e;
      padding: 6px 16px;
      border-radius: 999px;
    }
    .score-card p {
      margin-top: 16px;
      font-size: 13.5px;
      color: var(--text-light);
      text-align: left;
    }
    .compare-table-wrap {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-table-wrap table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }
    .compare-table-wrap th,
    .compare-table-wrap td {
      padding: 15px 18px;
      text-align: left;
      border-bottom: 1px solid var(--border);
    }
    .compare-table-wrap thead th {
      background: var(--bg-soft);
      font-weight: 700;
      color: var(--text);
      font-size: 14px;
    }
    .compare-table-wrap thead th:first-child {
      color: var(--text-light);
      font-weight: 600;
    }
    .compare-table-wrap tbody tr:last-child td {
      border-bottom: none;
    }
    .compare-table-wrap tbody tr:hover {
      background: #fffbf5;
    }
    .compare-table-wrap td:first-child {
      font-weight: 600;
      color: var(--text);
      width: 26%;
    }
    .tag-yes {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      color: #1f7a6e;
      font-weight: 600;
      font-size: 13px;
    }
    .tag-yes::before {
      content: "●";
      font-size: 9px;
    }
    .tag-no {
      color: #b0a9a0;
      font-size: 13px;
    }

    /* ---------- 案例展示 ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .case-media {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: var(--bg-soft);
    }
    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-media img {
      transform: scale(1.05);
    }
    .case-body {
      padding: 22px;
    }
    .case-body h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .case-body p {
      font-size: 14px;
      color: var(--text-light);
    }
    .case-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-top: 12px;
    }
    .case-tags span {
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 500;
    }
    .case-wide {
      grid-column: 1 / -1;
      display: grid;
      grid-template-columns: 1fr 1fr;
    }
    .case-wide .case-media {
      aspect-ratio: auto;
      height: 100%;
      min-height: 240px;
    }
    .case-wide .case-body {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    /* ---------- 用户评论 ---------- */
    .comment-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .comment-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .comment-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .comment-text {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.7;
      flex: 1;
    }
    .comment-user {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px dashed var(--border);
    }
    .comment-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      color: #fff;
      flex-shrink: 0;
    }
    .comment-card:nth-child(1) .comment-avatar { background: linear-gradient(135deg, #ff9f43, #ff6b6b); }
    .comment-card:nth-child(2) .comment-avatar { background: linear-gradient(135deg, #5f7cff, #7c9fff); }
    .comment-card:nth-child(3) .comment-avatar { background: linear-gradient(135deg, #6fd9c7, #3fb5a2); }
    .comment-card:nth-child(4) .comment-avatar { background: linear-gradient(135deg, #d6336c, #f06595); }
    .comment-card:nth-child(5) .comment-avatar { background: linear-gradient(135deg, #2b8a3e, #51cf66); }
    .comment-card:nth-child(6) .comment-avatar { background: linear-gradient(135deg, #a87a00, #ffcc4d); }
    .comment-meta strong {
      display: block;
      font-size: 14px;
      font-weight: 700;
    }
    .comment-meta span {
      font-size: 12.5px;
      color: var(--text-light);
    }

    /* ---------- 文章 & Token比价 ---------- */
    .split-two {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 28px;
      align-items: start;
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .article-item {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 16px 20px;
      transition: var(--transition);
    }
    .article-item:hover {
      border-color: var(--accent);
      transform: translateX(4px);
      box-shadow: var(--shadow-sm);
    }
    .article-index {
      font-size: 20px;
      font-weight: 900;
      color: var(--accent);
      width: 34px;
      flex-shrink: 0;
      line-height: 1;
    }
    .article-item a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      transition: var(--transition);
      flex: 1;
    }
    .article-item a:hover {
      color: var(--primary);
    }
    .article-more {
      margin-top: 16px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }
    .article-more:hover {
      gap: 10px;
    }
    .token-card {
      background: linear-gradient(155deg, #fff 0%, #eef1ff 100%);
      border: 1px solid #dfe4ff;
      border-radius: var(--radius);
      padding: 28px;
    }
    .token-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .token-card > p {
      font-size: 13.5px;
      color: var(--text-light);
      margin-bottom: 20px;
    }
    .token-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px dashed #dfe4ff;
      font-size: 14px;
    }
    .token-row:last-of-type {
      border-bottom: none;
    }
    .token-row span:first-child {
      color: var(--text-light);
    }
    .token-row strong {
      font-weight: 700;
      color: var(--secondary);
    }
    .token-note {
      margin-top: 18px;
      font-size: 12.5px;
      color: var(--text-light);
      background: rgba(255, 255, 255, 0.7);
      border-radius: 10px;
      padding: 12px 14px;
    }

    /* ---------- 服务网络 ---------- */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .network-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 22px 18px;
      text-align: center;
      transition: var(--transition);
    }
    .network-item:hover {
      border-color: var(--mint);
      box-shadow: var(--shadow-sm);
      transform: translateY(-3px);
    }
    .network-item strong {
      display: block;
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .network-item span {
      font-size: 13px;
      color: var(--text-light);
    }

    /* ---------- FAQ ---------- */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.open {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 18px 22px;
      background: none;
      border: none;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      text-align: left;
      font-family: inherit;
      transition: var(--transition);
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-question::after {
      content: "+";
      font-size: 22px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.25s ease;
      flex-shrink: 0;
      line-height: 1;
    }
    .faq-item.open .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-answer-inner {
      padding: 0 22px 20px;
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* ---------- 表单 & 联系 ---------- */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: start;
    }
    .contact-form {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text);
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid var(--border);
      border-radius: 12px;
      font-size: 14px;
      font-family: inherit;
      color: var(--text);
      background: #fffdfa;
      transition: var(--transition);
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.12);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 110px;
    }
    .form-submit {
      width: 100%;
      margin-top: 6px;
    }
    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-box {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px;
      transition: var(--transition);
    }
    .contact-box:hover {
      box-shadow: var(--shadow-sm);
    }
    .contact-box h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .contact-line {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--text-light);
      margin-bottom: 10px;
      word-break: break-all;
    }
    .contact-line:last-child {
      margin-bottom: 0;
    }
    .contact-line b {
      color: var(--text);
      font-weight: 600;
      flex-shrink: 0;
    }
    .qr-wrap {
      margin-top: 14px;
      text-align: center;
    }
    .qr-wrap img {
      width: 160px;
      margin: 0 auto 8px;
      border-radius: 12px;
      border: 1px solid var(--border);
    }
    .qr-wrap span {
      font-size: 12.5px;
      color: var(--text-light);
    }

    /* ---------- 页脚 ---------- */
    .site-footer {
      background: #2d2a3e;
      color: #e8e4f0;
      padding: 52px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 36px;
      padding-bottom: 36px;
    }
    .footer-brand .ai-page-logo {
      width: 120px;
      margin-bottom: 16px;
      
    }
    .footer-brand p {
      font-size: 13.5px;
      color: #b5aec8;
      line-height: 1.8;
      max-width: 340px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #fff;
    }
    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 9px;
    }
    .footer-col a {
      font-size: 13.5px;
      color: #b5aec8;
      transition: var(--transition);
    }
    .footer-col a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-size: 12.5px;
      color: #9d96b0;
    }
    .footer-bottom a {
      color: #b5aec8;
    }
    .footer-bottom a:hover {
      color: var(--accent);
    }

    /* ---------- 浮动客服 / 返回顶部 ---------- */
    .float-tools {
      position: fixed;
      right: 20px;
      bottom: 28px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 90;
    }
    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: var(--shadow-md);
      transition: var(--transition);
    }
    .float-btn.kf {
      background: linear-gradient(135deg, #6fd9c7, #3fb5a2);
      color: #fff;
    }
    .float-btn.top {
      background: #fff;
      color: var(--text);
      border: 1px solid var(--border);
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
    }
    .float-btn.top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .float-btn:hover {
      transform: translateY(-3px) scale(1.05);
    }
    .kf-pop {
      position: fixed;
      right: 86px;
      bottom: 28px;
      width: 220px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 18px;
      box-shadow: var(--shadow-lg);
      z-index: 91;
      display: none;
      text-align: center;
    }
    .kf-pop.show {
      display: block;
      animation: fadeUp 0.25s ease;
    }
    .kf-pop img {
      width: 150px;
      margin: 0 auto 10px;
      border-radius: 10px;
    }
    .kf-pop strong {
      display: block;
      font-size: 14px;
      margin-bottom: 4px;
    }
    .kf-pop span {
      font-size: 12.5px;
      color: var(--text-light);
    }

    /* ---------- 滚动渐入 ---------- */
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ---------- 响应式 ---------- */
    @media (max-width: 1024px) {
      .nav-links {
        display: none;
      }
      .nav-cta {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .hero-inner {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .hero-panel {
        max-width: 560px;
      }
      .about-grid,
      .split-two,
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .cap-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .review-layout {
        grid-template-columns: 1fr;
      }
      .score-card {
        position: static;
      }
      .comment-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .network-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-brand {
        grid-column: 1 / -1;
      }
    }
    @media (max-width: 768px) {
      .section {
        padding: 52px 0;
      }
      .container {
        padding: 0 18px;
      }
      .hero {
        padding: 48px 0 60px;
      }
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .hero-stats {
        grid-template-columns: 1fr 1fr;
      }
      .cap-grid,
      .comment-grid,
      .case-grid,
      .network-grid {
        grid-template-columns: 1fr;
      }
      .case-wide {
        grid-template-columns: 1fr;
      }
      .steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
      .float-tools {
        right: 14px;
        bottom: 18px;
      }
      .kf-pop {
        right: 76px;
        bottom: 18px;
      }
      .compare-table-wrap {
        overflow-x: auto;
      }
      .compare-table-wrap table {
        min-width: 560px;
      }
      .contact-form {
        padding: 24px;
      }
      .about-card {
        padding: 26px;
      }
    }
    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
      .reveal {
        opacity: 1;
        transform: none;
      }
    }