/* 全局变量与艳彩基调 (浅色背景 + 高饱和艳彩点缀) */
    :root {
      --primary: #582cd1;
      --primary-vivid: #7928ca;
      --accent-coral: #ff007a;
      --accent-cyan: #00d2ff;
      --accent-lime: #10b981;
      --accent-amber: #f59e0b;
      --accent-sunset: linear-gradient(135deg, #ff007a 0%, #7928ca 50%, #00d2ff 100%);
      --gradient-card: linear-gradient(145deg, #ffffff 0%, #f7f9ff 100%);
      --bg-light: #f6f8fd;
      --bg-white: #ffffff;
      --text-main: #141824;
      --text-muted: #555f77;
      --text-sub: #7a869e;
      --border-color: #e4e9f5;
      --border-glow: rgba(121, 40, 202, 0.25);
      --shadow-sm: 0 4px 12px rgba(20, 24, 36, 0.04);
      --shadow-md: 0 10px 30px rgba(121, 40, 202, 0.08);
      --shadow-lg: 0 20px 45px rgba(255, 0, 122, 0.12);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-full: 9999px;
      --container-max: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-light);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background: radial-gradient(circle at 10% 10%, rgba(255, 0, 122, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 90% 20%, rgba(0, 210, 255, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 50% 80%, rgba(121, 40, 202, 0.04) 0%, transparent 50%),
                  var(--bg-light);
      min-height: 100vh;
      line-height: 1.65;
      overflow-x: hidden;
    }

    /* 容器基准 */
    .site-container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(228, 233, 245, 0.8);
      transition: all 0.3s ease;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-wrap .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-title-badge {
      display: flex;
      flex-direction: column;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(90deg, #7928ca, #ff007a);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    .brand-slogan {
      font-size: 0.72rem;
      color: var(--text-sub);
      font-weight: 600;
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 严格要求：.nav-links的gap属性设置为0 */
      list-style: none;
    }

    .nav-item a,
    .nav-item .ai-page-home-link {
      display: inline-block;
      padding: 8px 12px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      text-decoration: none;
      transition: color 0.2s ease;
      white-space: nowrap;
    }

    .nav-item a:hover,
    .nav-item .ai-page-home-link:hover {
      color: var(--accent-coral);
    }

    .nav-action-btns {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.88rem;
      font-weight: 700;
      color: #ffffff;
      background: var(--accent-sunset);
      border-radius: var(--radius-full);
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(255, 0, 122, 0.35);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .btn-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 0, 122, 0.5);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 3px;
      background-color: var(--text-main);
      margin: 4px 0;
      border-radius: 2px;
      transition: 0.3s;
    }

    /* 首屏 HERO (无图片设计) */
    .hero-section {
      padding: 60px 0 70px 0;
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(246, 248, 253, 0.4) 100%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-glow-blob {
      position: absolute;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(121, 40, 202, 0.15) 0%, rgba(255, 0, 122, 0.08) 50%, transparent 70%);
      top: -100px;
      right: -100px;
      filter: blur(50px);
      pointer-events: none;
      z-index: 0;
    }

    .hero-glow-blob-2 {
      position: absolute;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(0, 210, 255, 0.15) 0%, rgba(16, 185, 129, 0.05) 50%, transparent 70%);
      bottom: -80px;
      left: -80px;
      filter: blur(40px);
      pointer-events: none;
      z-index: 0;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 0, 122, 0.08);
      border: 1px solid rgba(255, 0, 122, 0.3);
      border-radius: var(--radius-full);
      color: var(--accent-coral);
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 24px;
      animation: pulseGlow 3s infinite alternate;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 0 rgba(255, 0, 122, 0); }
      100% { box-shadow: 0 0 16px rgba(255, 0, 122, 0.25); }
    }

    /* 必须改写且小于 20 字的 H1 */
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title .highlight {
      background: var(--accent-sunset);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn-hero-primary {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 16px 36px;
      font-size: 1.05rem;
      font-weight: 800;
      color: #ffffff;
      background: linear-gradient(135deg, #ff007a 0%, #7928ca 100%);
      border-radius: var(--radius-full);
      text-decoration: none;
      box-shadow: 0 8px 25px rgba(255, 0, 122, 0.35);
      transition: all 0.25s ease;
      border: 2px solid rgba(255, 255, 255, 0.6);
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 35px rgba(255, 0, 122, 0.5);
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 16px 32px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--primary-vivid);
      background: #ffffff;
      border: 2px solid var(--primary-vivid);
      border-radius: var(--radius-full);
      text-decoration: none;
      transition: all 0.25s ease;
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-secondary:hover {
      background: rgba(121, 40, 202, 0.05);
      transform: translateY(-2px);
    }

    .hero-tags-bar {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .hero-tag-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.84rem;
      color: var(--text-main);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .hero-tag-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-lime);
    }

    /* 数据指标栏 */
    .metrics-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 50px;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: transform 0.25s ease;
    }

    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--accent-sunset);
    }

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

    .metric-value {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary-vivid);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 通用章节规范 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-wrap.alt-bg {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px auto;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent-coral);
      margin-bottom: 10px;
      background: rgba(255, 0, 122, 0.08);
      padding: 4px 14px;
      border-radius: var(--radius-full);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 模型矩阵徽章云 */
    .model-matrix-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 10px 18px;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      border-color: var(--primary-vivid);
      color: var(--primary-vivid);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .model-chip span {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: var(--radius-full);
      background: rgba(121, 40, 202, 0.1);
      color: var(--primary-vivid);
    }

    /* 服务卡片网格 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .cards-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      border-color: rgba(255, 0, 122, 0.4);
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .card-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--accent-sunset);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      box-shadow: 0 8px 18px rgba(121, 40, 202, 0.25);
    }

    .card-icon-box.cyan {
      background: linear-gradient(135deg, #00d2ff 0%, #0070f3 100%);
    }

    .card-icon-box.lime {
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    }

    .card-icon-box.amber {
      background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    }

    .feature-card h3 {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .feature-badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .feature-sub-badge {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-sub);
    }

    /* 流程步骤条 */
    .steps-flow-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease;
    }

    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-vivid);
    }

    .step-num {
      width: 38px;
      height: 38px;
      margin: 0 auto 16px auto;
      background: var(--accent-sunset);
      color: #ffffff;
      font-weight: 800;
      font-size: 1rem;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .step-item h4 {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测卡片与表格 */
    .review-score-banner {
      background: linear-gradient(135deg, #ffffff 0%, #f4f0ff 100%);
      border: 2px solid rgba(121, 40, 202, 0.3);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 36px;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }

    .score-left h3 {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .score-left p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .score-right {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .star-rating {
      color: #ffb800;
      font-size: 1.6rem;
      letter-spacing: 2px;
    }

    .score-big-num {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1;
      background: var(--accent-sunset);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .score-scale {
      font-size: 1.1rem;
      color: var(--text-sub);
      font-weight: 700;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

    .compare-table th {
      background: #f8fafc;
      padding: 16px 20px;
      font-weight: 800;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-muted);
    }

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

    .compare-table tr:hover td {
      background-color: #fafbfe;
    }

    .tag-strong {
      display: inline-block;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      font-size: 0.78rem;
      font-weight: 700;
    }

    .tag-strong.win {
      background: rgba(16, 185, 129, 0.12);
      color: #059669;
    }

    .tag-strong.loss {
      background: rgba(239, 68, 68, 0.1);
      color: #dc2626;
    }

    /* 案例展示区 (规范引入媒体图片) */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

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

    .media-card-img-box {
      width: 100%;
      position: relative;
      background: #eaedf5;
      overflow: hidden;
    }

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

    .media-card:hover .media-card-img-box img {
      transform: scale(1.02);
    }

    .media-card-body {
      padding: 20px;
    }

    .media-card-title {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .media-card-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    .banner-gallery-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .banner-thumb-item {
      background: #ffffff;
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .banner-thumb-item img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 用户评论卡片 (6条真实评论) */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: transform 0.25s ease;
    }

    .testimonial-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent-coral);
    }

    .testimonial-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .user-avatar-badge {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--accent-sunset);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .user-info h4 {
      font-size: 1rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .user-info span {
      font-size: 0.8rem;
      color: var(--accent-coral);
      font-weight: 600;
    }

    .testimonial-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      font-style: normal;
      flex-grow: 1;
    }

    /* Token 比价与 API 接入 */
    .pricing-api-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 24px;
    }

    .pricing-col-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      background: #fafbfe;
      position: relative;
      transition: all 0.25s ease;
    }

    .pricing-col-card.popular {
      border-color: var(--accent-coral);
      background: #ffffff;
      box-shadow: var(--shadow-md);
    }

    .pricing-col-card.popular::before {
      content: "官方推荐";
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent-coral);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 14px;
      border-radius: var(--radius-full);
    }

    .price-num {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--primary-vivid);
      margin: 14px 0 6px 0;
    }

    .price-num span {
      font-size: 0.9rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color 0.2s ease;
    }

    .faq-item.active {
      border-color: var(--primary-vivid);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

    .faq-question:hover {
      color: var(--accent-coral);
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: var(--primary-vivid);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #fafbfe;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
      border-top: 1px solid rgba(228, 233, 245, 0.6);
    }

    .faq-answer p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      padding-top: 12px;
    }

    /* 需求匹配与表单 */
    .form-section-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 860px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 13px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #fafbfe;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-vivid);
      box-shadow: 0 0 0 3px rgba(121, 40, 202, 0.15);
      background: #ffffff;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    .btn-submit-form {
      width: 100%;
      padding: 16px;
      font-size: 1.05rem;
      font-weight: 800;
      color: #ffffff;
      background: var(--accent-sunset);
      border: none;
      border-radius: var(--radius-full);
      cursor: pointer;
      box-shadow: 0 6px 20px rgba(255, 0, 122, 0.35);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-submit-form:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(255, 0, 122, 0.5);
    }

    /* 资讯与百科 */
    .news-articles-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .news-dynamic-list {
      margin-bottom: 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .news-links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .news-ext-link {
      display: inline-block;
      padding: 8px 16px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--primary-vivid);
      text-decoration: none;
      font-weight: 600;
      transition: all 0.2s ease;
    }

    .news-ext-link:hover {
      background: var(--primary-vivid);
      color: #ffffff;
      border-color: var(--primary-vivid);
    }

    /* 联系我们全渠道 */
    .contact-channels-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 16px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .contact-item-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(121, 40, 202, 0.1);
      color: var(--primary-vivid);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 800;
      flex-shrink: 0;
    }

    .contact-item-text h5 {
      font-size: 0.85rem;
      color: var(--text-sub);
      margin-bottom: 2px;
    }

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

    .qr-card-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .qr-card-wrap img {
      max-width: 170px;
      height: auto;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      margin-bottom: 12px;
    }

    .qr-card-wrap p {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 友情链接与主页脚 (强制深色文字安全对比) */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 32px 0;
      color: var(--text-muted);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 36px;
    }

    .footer-brand-side h4 {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .footer-brand-side p {
      font-size: 0.9rem;
      line-height: 1.65;
      color: var(--text-muted);
      max-width: 480px;
    }

    .footer-nav-col h5 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }

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

    .footer-nav-col a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: color 0.2s ease;
    }

    .footer-nav-col a:hover {
      color: var(--accent-coral);
    }

    .footer-friend-links-area {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.88rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friend-links-flex a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.86rem;
      transition: color 0.2s ease;
    }

    .friend-links-flex a:hover {
      color: var(--primary-vivid);
      text-decoration: underline;
    }

    .footer-bottom-copy {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: var(--text-sub);
    }

    /* 浮动工具与客服 */
    .floating-widget {
      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: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--primary-vivid);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      font-size: 1.2rem;
      font-weight: 800;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .float-btn:hover {
      background: var(--accent-sunset);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1080px) {
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-flow-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .metrics-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-gallery-row {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 860px) {
      .header-inner {
        height: 68px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-item a,
      .nav-item .ai-page-home-link {
        width: 100%;
        padding: 10px 0;
        border-bottom: 1px solid #f0f3fa;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .cards-grid-3,
      .testimonial-grid,
      .pricing-grid,
      .media-showcase-grid,
      .contact-channels-grid {
        grid-template-columns: 1fr;
      }
      .steps-flow-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }