/* ---------- 全局重置与变量 ---------- */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    :root {
      --primary: #1a2b4c;
      --primary-light: #2d4a7a;
      --accent: #3b7cf6;
      --accent-soft: #e9f0fe;
      --accent-glow: rgba(59, 124, 246, 0.25);
      --bg-base: #f8fafd;
      --bg-white: #ffffff;
      --text-main: #1a2b4c;
      --text-body: #2e3a4d;
      --text-muted: #5e6e85;
      --border-light: #e2e9f3;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.07);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --gradient-laser: linear-gradient(135deg, #3b7cf6 0%, #9b6ef3 45%, #e86fc4 100%);
      --gradient-soft: linear-gradient(135deg, #f0f4fe 0%, #f9f0fe 100%);
    }
    html {
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
      scroll-padding-top: 80px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background: var(--bg-base);
      color: var(--text-body);
      line-height: 1.6;
      font-size: 16px;
      background-image:
        radial-gradient(ellipse 70% 50% at 10% 0%, rgba(59, 124, 246, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 95% 20%, rgba(155, 110, 243, 0.05) 0%, transparent 55%);
      background-repeat: no-repeat;
      background-size: 100% 100%;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-sm);
      object-fit: contain;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    ul, ol {
      list-style: none;
    }
    /* 容器 */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 通用区块 */
    .section {
      padding: 56px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 36px;
      text-align: center;
    }
    .section-header .eyebrow {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 4px 14px;
      border-radius: 100px;
      margin-bottom: 12px;
    }
    .section-header h2 {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 8px;
    }
    .section-header p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }
    /* 按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 100px;
      font-weight: 600;
      font-size: 0.95rem;
      transition: all 0.25s ease;
      cursor: pointer;
      border: none;
      text-align: center;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--gradient-laser);
      color: #fff;
      box-shadow: 0 4px 14px var(--accent-glow);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(59, 124, 246, 0.35);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 1.5px solid var(--border-light);
    }
    .btn-outline:hover {
      border-color: var(--accent);
      background: var(--accent-soft);
      transform: translateY(-1px);
    }
    .btn-sm {
      padding: 8px 20px;
      font-size: 0.85rem;
    }
    /* ---------- 导航 ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 233, 243, 0.6);
      transition: box-shadow 0.2s;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      gap: 16px;
    }
    .brand {
      display: flex;
      align-items: center;
      flex-shrink: 0;
    }
    .brand img {
      max-height: 40px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      row-gap: 4px;
    }
    .nav-links a {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-body);
      padding: 6px 12px;
      border-radius: 8px;
      transition: background 0.2s, color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      background: var(--accent-soft);
      color: var(--accent);
    }
    .nav-links .ai-page-home-link {
      font-weight: 600;
      color: var(--accent);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-light);
      border-radius: 10px;
      padding: 8px 10px;
      cursor: pointer;
      flex-direction: column;
      gap: 4px;
    }
    .menu-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text-main);
      border-radius: 2px;
      transition: 0.2s;
    }
    /* ---------- Hero ---------- */
    .hero {
      padding: 56px 0 48px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse 60% 55% at 25% 10%, rgba(59, 124, 246, 0.09) 0%, transparent 65%),
        radial-gradient(ellipse 50% 50% at 80% 50%, rgba(155, 110, 243, 0.07) 0%, transparent 60%);
      pointer-events: none;
    }
    .hero .container {
      position: relative;
      z-index: 1;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--accent);
      background: rgba(59, 124, 246, 0.08);
      padding: 6px 16px;
      border-radius: 100px;
      width: fit-content;
      letter-spacing: 0.02em;
    }
    .hero-badge .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      animation: pulse-dot 2s infinite;
    }
    @keyframes pulse-dot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.8); }
    }
    .hero h1 {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .hero h1 .gradient-text {
      background: var(--gradient-laser);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 540px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }
    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      padding-top: 8px;
      border-top: 1px solid var(--border-light);
      margin-top: 4px;
      padding-top: 20px;
    }
    .hero-meta-item {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .hero-meta-item strong {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .hero-meta-item span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    /* Hero 右侧几何视觉 */
    .hero-visual {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 340px;
    }
    .orbit-group {
      position: relative;
      width: 100%;
      max-width: 380px;
      aspect-ratio: 1;
    }
    .orbit-ring {
      position: absolute;
      inset: 0;
      border-radius: 50%;
      border: 1.5px solid rgba(59, 124, 246, 0.15);
      animation: rotate-ring 24s linear infinite;
    }
    .orbit-ring:nth-child(2) {
      inset: 12%;
      border-color: rgba(155, 110, 243, 0.12);
      animation-duration: 18s;
      animation-direction: reverse;
    }
    .orbit-ring:nth-child(3) {
      inset: 24%;
      border-color: rgba(232, 111, 196, 0.1);
      animation-duration: 14s;
    }
    .orbit-core {
      position: absolute;
      inset: 34%;
      border-radius: 50%;
      background: var(--gradient-laser);
      box-shadow: 0 0 60px var(--accent-glow), 0 0 100px rgba(155, 110, 243, 0.12);
      animation: pulse-core 4s ease-in-out infinite;
    }
    @keyframes rotate-ring {
      to { transform: rotate(360deg); }
    }
    @keyframes pulse-core {
      0%, 100% { transform: scale(1); opacity: 0.85; }
      50% { transform: scale(1.04); opacity: 1; }
    }
    .orbit-node {
      position: absolute;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.65rem;
      font-weight: 700;
      color: var(--accent);
      transition: transform 0.3s;
    }
    .orbit-node:nth-child(4) { top: 4%; left: 50%; transform: translateX(-50%); }
    .orbit-node:nth-child(5) { bottom: 4%; left: 50%; transform: translateX(-50%); }
    .orbit-node:nth-child(6) { left: 4%; top: 50%; transform: translateY(-50%); }
    .orbit-node:nth-child(7) { right: 4%; top: 50%; transform: translateY(-50%); }
    /* ---------- 数据指标 ---------- */
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      border: 1px solid var(--border-light);
      text-align: center;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .metric-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .metric-card .num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.2;
    }
    .metric-card .num em {
      font-style: normal;
      font-size: 1rem;
      color: var(--accent);
    }
    .metric-card .label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }
    /* ---------- 平台介绍 ---------- */
    .about-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: start;
    }
    .about-text p {
      margin-bottom: 16px;
      color: var(--text-body);
    }
    .about-highlight {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .about-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }
    .about-item .check-icon {
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: var(--accent-soft);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.7rem;
      font-weight: 700;
      margin-top: 2px;
    }
    .about-item strong {
      display: block;
      font-size: 0.9rem;
      color: var(--text-main);
      margin-bottom: 2px;
    }
    .about-item span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .about-visual {
      background: var(--gradient-soft);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid var(--border-light);
    }
    .about-visual h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .model-tags span {
      background: var(--bg-white);
      padding: 5px 14px;
      border-radius: 100px;
      font-size: 0.78rem;
      font-weight: 500;
      color: var(--text-body);
      border: 1px solid var(--border-light);
      transition: border-color 0.2s, color 0.2s;
    }
    .model-tags span:hover {
      border-color: var(--accent);
      color: var(--accent);
    }
    /* ---------- 服务能力卡片 ---------- */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(59, 124, 246, 0.2);
    }
    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--accent-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 4px;
    }
    .service-card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* ---------- 流程步骤 ---------- */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }
    .step-item {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px 20px 24px;
      border: 1px solid var(--border-light);
      position: relative;
      transition: transform 0.25s, box-shadow 0.25s;
      counter-increment: step;
    }
    .step-item:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .step-item::before {
      content: counter(step, decimal-leading-zero);
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--accent-soft);
      position: absolute;
      top: 16px;
      right: 18px;
      line-height: 1;
    }
    .step-item h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      position: relative;
      z-index: 1;
    }
    .step-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.55;
      position: relative;
      z-index: 1;
    }
    /* ---------- 对比评测 ---------- */
    .comparison-wrap {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .rating-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      padding: 24px 28px;
      background: var(--gradient-soft);
      border-bottom: 1px solid var(--border-light);
    }
    .rating-header .rating-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .rating-stars {
      display: flex;
      gap: 2px;
      color: #f5a623;
      font-size: 1.2rem;
    }
    .rating-score {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1;
    }
    .rating-score small {
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
    }
    .rating-header p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .table-scroll {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 640px;
    }
    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      text-align: left;
      font-size: 0.9rem;
      border-bottom: 1px solid var(--border-light);
    }
    .comparison-table th {
      background: #fafcff;
      font-weight: 700;
      color: var(--text-main);
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.03em;
    }
    .comparison-table td:first-child {
      font-weight: 600;
      color: var(--text-main);
      white-space: nowrap;
    }
    .comparison-table .highlight-col {
      background: rgba(59, 124, 246, 0.03);
      font-weight: 500;
    }
    .comparison-table .check {
      color: var(--accent);
      font-weight: 700;
      margin-right: 4px;
    }
    .comparison-table tr:last-child td {
      border-bottom: none;
    }
    /* ---------- 案例展示 ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      transition: transform 0.25s, box-shadow 0.25s;
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .case-image-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      background: #eef3fb;
      overflow: hidden;
    }
    .case-image-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
      border-radius: 0;
    }
    .case-card:hover .case-image-wrap img {
      transform: scale(1.03);
    }
    .case-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
    }
    .case-body h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .case-body p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    .case-tag {
      display: inline-block;
      font-size: 0.72rem;
      font-weight: 600;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 2px 10px;
      border-radius: 100px;
      width: fit-content;
      margin-top: 4px;
    }
    /* ---------- 用户评论 ---------- */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .review-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
      transition: transform 0.25s, box-shadow 0.25s;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .review-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #f5a623;
      font-size: 0.9rem;
      letter-spacing: 2px;
    }
    .review-card p {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.65;
      flex: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 10px;
      padding-top: 12px;
      border-top: 1px solid var(--border-light);
    }
    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--gradient-laser);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      font-weight: 700;
      color: #fff;
      flex-shrink: 0;
    }
    .review-author strong {
      display: block;
      font-size: 0.85rem;
      color: var(--text-main);
    }
    .review-author span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    /* ---------- Token比价 & 价格参考 ---------- */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      transition: transform 0.25s, box-shadow 0.25s;
      display: flex;
      flex-direction: column;
      gap: 12px;
      position: relative;
    }
    .price-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .price-card .plan-name {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .price-card .price {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.2;
    }
    .price-card .price small {
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
    }
    .price-card ul {
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--text-body);
    }
    .price-card ul li {
      display: flex;
      gap: 8px;
      align-items: flex-start;
    }
    .price-card ul li::before {
      content: '✓';
      color: var(--accent);
      font-weight: 700;
      flex-shrink: 0;
    }
    .price-card .btn {
      margin-top: auto;
    }
    /* ---------- FAQ ---------- */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item:hover {
      border-color: rgba(59, 124, 246, 0.2);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-main);
      user-select: none;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #fafcff;
    }
    .faq-question .arrow {
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.25s;
      font-size: 0.7rem;
      color: var(--text-muted);
    }
    .faq-item.open .faq-question .arrow {
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 22px;
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 0 22px 18px;
    }
    /* ---------- 文章列表 ---------- */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .article-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
      transition: transform 0.25s, box-shadow 0.25s;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .article-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .article-card .article-date {
      font-size: 0.75rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .article-card h3 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
    }
    .article-card p {
      font-size: 0.83rem;
      color: var(--text-muted);
      line-height: 1.55;
      flex: 1;
    }
    /* ---------- 表单 ---------- */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-info h2 {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
    }
    .contact-info > p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .contact-methods {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .contact-method-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9rem;
      color: var(--text-body);
      padding: 10px 14px;
      background: var(--bg-white);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }
    .contact-method-item .icon-box {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--accent-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      flex-shrink: 0;
    }
    .contact-form-wrap {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }
    .contact-form-wrap h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .contact-form-wrap .form-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .form-group {
      margin-bottom: 16px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .form-group label .required {
      color: #e85d5d;
      margin-left: 2px;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-family: inherit;
      color: var(--text-body);
      background: #fafcff;
      transition: border-color 0.2s, box-shadow 0.2s;
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-glow);
      background: var(--bg-white);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    /* ---------- 页脚 ---------- */
    .site-footer {
      background: #152238;
      color: #cbd5e6;
      padding: 48px 0 0;
      margin-top: 16px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .footer-brand img {
      max-height: 36px;
      width: auto;
      
    }
    .footer-brand p {
      font-size: 0.85rem;
      color: #a9b6cc;
      line-height: 1.7;
    }
    .footer-col h4 {
      font-size: 0.9rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      letter-spacing: 0.02em;
    }
    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col a {
      font-size: 0.84rem;
      color: #a9b6cc;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: #ffffff;
    }
    .footer-links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 14px;
    }
    .footer-links-cloud a {
      font-size: 0.8rem;
      color: #a9b6cc;
      transition: color 0.2s;
    }
    .footer-links-cloud a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      padding: 20px 0;
      font-size: 0.8rem;
      color: #7e8da6;
    }
    .footer-bottom a {
      color: #a9b6cc;
    }
    .footer-bottom a:hover {
      color: #ffffff;
    }
    /* ---------- 浮动客服 & 返回顶部 ---------- */
    .float-actions {
      position: fixed;
      right: 20px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 200;
    }
    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.25s;
      font-size: 1rem;
      color: var(--text-main);
      position: relative;
    }
    .float-btn:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
      border-color: var(--accent);
      color: var(--accent);
    }
    .float-btn.back-top {
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s, visibility 0.3s, transform 0.25s;
    }
    .float-btn.back-top.visible {
      opacity: 1;
      visibility: visible;
    }
    .kefu-popover {
      position: absolute;
      right: 54px;
      bottom: 0;
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 14px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-light);
      width: 180px;
      opacity: 0;
      visibility: hidden;
      transform: translateX(6px);
      transition: all 0.25s;
      pointer-events: none;
    }
    .float-btn.kefu:hover .kefu-popover {
      opacity: 1;
      visibility: visible;
      transform: translateX(0);
      pointer-events: auto;
    }
    .kefu-popover img {
      width: 100%;
      border-radius: var(--radius-sm);
      margin-bottom: 8px;
    }
    .kefu-popover p {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-align: center;
      line-height: 1.5;
    }
    /* ---------- 滚动渐入动画 ---------- */
    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.05s; }
    .reveal-delay-2 { transition-delay: 0.1s; }
    .reveal-delay-3 { transition-delay: 0.15s; }
    .reveal-delay-4 { transition-delay: 0.2s; }
    /* ---------- 响应式 ---------- */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
      .hero-visual {
        min-height: 260px;
      }
      .orbit-group {
        max-width: 300px;
      }
      .about-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .article-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .price-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
      .section {
        padding: 40px 0;
      }
      .section-header h2 {
        font-size: 1.6rem;
      }
      .hero {
        padding: 40px 0 32px;
      }
      .hero h1 {
        font-size: 1.8rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .hero-meta {
        gap: 16px;
      }
      .hero-meta-item strong {
        font-size: 1.2rem;
      }
      .service-grid {
        grid-template-columns: 1fr;
      }
      .steps-row {
        grid-template-columns: 1fr;
      }
      .case-grid {
        grid-template-columns: 1fr;
      }
      .article-grid {
        grid-template-columns: 1fr;
      }
      .review-grid {
        grid-template-columns: 1fr;
      }
      .price-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .header-actions .btn {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-md);
        gap: 4px;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
        border-radius: 6px;
      }
      .site-header {
        position: relative;
      }
      .header-inner {
        position: relative;
      }
      .about-highlight {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .rating-header {
        flex-direction: column;
        align-items: flex-start;
      }
      .contact-form-wrap {
        padding: 24px 18px;
      }
    }
    @media (max-width: 480px) {
      .hero h1 {
        font-size: 1.55rem;
      }
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .metrics-row {
        grid-template-columns: 1fr;
      }
      .metric-card .num {
        font-size: 1.5rem;
      }
    }