/* 全局重置与基底 */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --mint-50: #f0faf5;
      --mint-100: #d9f2e6;
      --mint-200: #b3e6d0;
      --mint-300: #7fd4b2;
      --mint-400: #42b98f;
      --mint-500: #1a9d6f;
      --mint-600: #0e7d57;
      --mint-700: #0a5f42;
      --ink-900: #14221c;
      --ink-800: #1e3029;
      --ink-700: #2b4038;
      --ink-600: #3e5a50;
      --ink-400: #6f847c;
      --ink-200: #b8c9c2;
      --ink-100: #dce8e3;
      --paper: #fbfdfb;
      --white: #ffffff;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow-sm: 0 1px 3px rgba(20, 34, 28, 0.06);
      --shadow-md: 0 6px 20px rgba(20, 34, 28, 0.08);
      --shadow-lg: 0 16px 44px rgba(20, 34, 28, 0.12);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 84px;
    }

    body {
      font-family: var(--font-sans);
      background: var(--paper);
      color: var(--ink-800);
      line-height: 1.65;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    /* 统一容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(251, 253, 251, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--mint-100);
      transition: box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(20, 34, 28, 0.06);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      text-decoration: none;
    }

    .brand img {
      width: 38px;
      height: 38px;
      object-fit: contain;
      display: block;
    }

    .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: var(--ink-900);
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

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

    .nav-links a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      color: var(--ink-600);
      text-decoration: none;
      border-radius: 8px;
      transition: color 0.2s ease, background 0.2s ease;
      white-space: nowrap;
    }

    .nav-links a:hover {
      color: var(--mint-600);
      background: var(--mint-50);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      border: none;
      border-radius: 999px;
      font-family: inherit;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      text-decoration: none;
      transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
      white-space: nowrap;
      padding: 10px 20px;
    }

    .btn:active {
      transform: scale(0.97);
    }

    .btn-primary {
      background: var(--mint-500);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(26, 157, 111, 0.28);
    }

    .btn-primary:hover {
      background: var(--mint-600);
      box-shadow: 0 6px 18px rgba(26, 157, 111, 0.36);
    }

    .btn-outline {
      background: transparent;
      color: var(--mint-700);
      border: 1.5px solid var(--mint-200);
    }

    .btn-outline:hover {
      background: var(--mint-50);
      border-color: var(--mint-400);
    }

    .btn-ghost {
      background: var(--white);
      color: var(--ink-800);
      border: 1px solid var(--ink-100);
      box-shadow: var(--shadow-sm);
    }

    .btn-ghost:hover {
      border-color: var(--mint-300);
      color: var(--mint-700);
    }

    .mobile-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--ink-100);
      border-radius: 10px;
      width: 42px;
      height: 42px;
      cursor: pointer;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
    }

    .mobile-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--ink-700);
      border-radius: 2px;
      transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .mobile-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .mobile-toggle.active span:nth-child(2) {
      opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .mobile-menu {
      display: none;
      flex-direction: column;
      padding: 8px 0 16px;
      border-top: 1px solid var(--mint-100);
    }

    .mobile-menu a {
      padding: 12px 8px;
      font-size: 15px;
      color: var(--ink-700);
      text-decoration: none;
      border-radius: 8px;
    }

    .mobile-menu a:hover {
      background: var(--mint-50);
      color: var(--mint-600);
    }

    .mobile-menu.open {
      display: flex;
    }

    /* 首屏 Hero */
    .hero {
      position: relative;
      padding: 56px 0 64px;
      background: linear-gradient(160deg, #f0faf5 0%, #e6f7ee 40%, #f7fdf9 100%);
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      top: -120px;
      right: -80px;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(127, 212, 178, 0.25), transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero::after {
      content: "";
      position: absolute;
      bottom: -160px;
      left: -100px;
      width: 380px;
      height: 380px;
      background: radial-gradient(circle, rgba(26, 157, 111, 0.12), transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      gap: 36px;
    }

    .hero-top {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-copy {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 600;
      color: var(--mint-700);
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: 999px;
      padding: 6px 14px;
      width: fit-content;
      box-shadow: var(--shadow-sm);
    }

    .hero-eyebrow i {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--mint-500);
      display: inline-block;
    }

    .hero h1 {
      font-size: clamp(30px, 4.4vw, 48px);
      line-height: 1.18;
      color: var(--ink-900);
      font-weight: 800;
      letter-spacing: -0.01em;
      max-width: 620px;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--mint-600);
    }

    .hero-desc {
      font-size: 16px;
      color: var(--ink-600);
      max-width: 540px;
      line-height: 1.75;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 6px;
    }

    .hero-actions .btn {
      padding: 13px 28px;
      font-size: 15px;
    }

    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 28px;
      margin-top: 8px;
      padding-top: 20px;
      border-top: 1px solid rgba(26, 157, 111, 0.15);
    }

    .hero-stat {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .hero-stat strong {
      font-size: 22px;
      font-weight: 800;
      color: var(--mint-700);
      letter-spacing: -0.01em;
    }

    .hero-stat span {
      font-size: 13px;
      color: var(--ink-400);
    }

    .hero-panel {
      background: var(--white);
      border-radius: 22px;
      padding: 24px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--mint-100);
      display: flex;
      flex-direction: column;
      gap: 16px;
      animation: floatIn 0.8s ease both;
    }

    .hero-panel-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--ink-800);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .hero-panel-title span {
      font-size: 11px;
      font-weight: 600;
      color: var(--mint-600);
      background: var(--mint-50);
      border-radius: 999px;
      padding: 3px 10px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-tag {
      font-size: 12px;
      color: var(--ink-700);
      background: var(--mint-50);
      border: 1px solid var(--mint-100);
      border-radius: 999px;
      padding: 5px 11px;
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .model-tag:hover {
      background: var(--mint-100);
      transform: translateY(-1px);
    }

    .hero-panel-footer {
      font-size: 13px;
      color: var(--ink-400);
      border-top: 1px dashed var(--ink-100);
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
    }

    .hero-panel-footer a {
      color: var(--mint-600);
      font-weight: 600;
      text-decoration: none;
    }

    .hero-panel-footer a:hover {
      text-decoration: underline;
    }

    /* 通用 section */
    .section {
      padding: 64px 0;
    }

    .section-alt {
      background: linear-gradient(180deg, #f7fdf9 0%, #f0faf5 100%);
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 40px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .section-eyebrow {
      font-size: 13px;
      font-weight: 700;
      color: var(--mint-600);
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .section-head h2 {
      font-size: clamp(24px, 3vw, 34px);
      color: var(--ink-900);
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.01em;
    }

    .section-head p {
      font-size: 15px;
      color: var(--ink-600);
      line-height: 1.75;
    }

    /* 关于我们 / 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: stretch;
    }

    .about-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: box-shadow 0.25s ease, transform 0.25s ease;
    }

    .about-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .about-card h3 {
      font-size: 19px;
      color: var(--ink-900);
      font-weight: 700;
    }

    .about-card p {
      font-size: 14.5px;
      color: var(--ink-600);
      line-height: 1.75;
    }

    .about-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .about-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14.5px;
      color: var(--ink-700);
    }

    .about-list li::before {
      content: "✓";
      color: var(--mint-500);
      font-weight: 700;
      flex-shrink: 0;
      background: var(--mint-50);
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      margin-top: 2px;
    }

    /* 数据指标卡片 */
    .metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 8px;
    }

    .metric-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 22px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .metric-card strong {
      display: block;
      font-size: 28px;
      font-weight: 800;
      color: var(--mint-600);
      letter-spacing: -0.02em;
    }

    .metric-card span {
      display: block;
      font-size: 13px;
      color: var(--ink-500);
      margin-top: 4px;
    }

    /* 服务能力卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .service-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 10px;
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--mint-200);
    }

    .service-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: var(--mint-50);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      flex-shrink: 0;
    }

    .service-card h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--ink-900);
    }

    .service-card p {
      font-size: 13.5px;
      color: var(--ink-500);
      line-height: 1.7;
    }

    /* 流程步骤 */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      counter-reset: step;
    }

    .step-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease;
    }

    .step-card:hover {
      transform: translateY(-3px);
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--mint-500);
      color: #fff;
      font-weight: 800;
      font-size: 15px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      box-shadow: 0 4px 12px rgba(26, 157, 111, 0.25);
    }

    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 6px;
    }

    .step-card p {
      font-size: 13.5px;
      color: var(--ink-500);
      line-height: 1.65;
    }

    /* 对比评测 + 表格 */
    .compare-wrap {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }

    .rating-banner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 18px;
      background: linear-gradient(120deg, var(--mint-50), #eafaf2);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius);
      padding: 20px 24px;
      margin-bottom: 24px;
    }

    .rating-banner .stars {
      color: #f5b301;
      font-size: 22px;
      letter-spacing: 2px;
    }

    .rating-banner .score {
      font-size: 34px;
      font-weight: 800;
      color: var(--mint-600);
      line-height: 1;
    }

    .rating-banner .score small {
      font-size: 15px;
      color: var(--ink-400);
      font-weight: 500;
    }

    .rating-banner p {
      font-size: 14px;
      color: var(--ink-600);
      max-width: 480px;
      text-align: center;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
      min-width: 640px;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 16px;
      text-align: left;
      border-bottom: 1px solid var(--ink-100);
    }

    .compare-table th {
      background: var(--mint-50);
      color: var(--ink-800);
      font-weight: 700;
      font-size: 13.5px;
      white-space: nowrap;
    }

    .compare-table td {
      color: var(--ink-600);
    }

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

    .compare-table .highlight {
      color: var(--mint-700);
      font-weight: 700;
      background: rgba(217, 242, 230, 0.4);
    }

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

    .review-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 12px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .review-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .review-card .stars {
      color: #f5b301;
      font-size: 14px;
      letter-spacing: 1px;
    }

    .review-card blockquote {
      font-size: 14px;
      color: var(--ink-600);
      line-height: 1.75;
      border-left: 3px solid var(--mint-200);
      padding-left: 14px;
      margin: 0;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: auto;
      padding-top: 8px;
      border-top: 1px solid var(--ink-100);
    }

    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--mint-100);
      color: var(--mint-700);
      font-weight: 700;
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .review-author strong {
      font-size: 13.5px;
      color: var(--ink-800);
      display: block;
    }

    .review-author span {
      font-size: 12px;
      color: var(--ink-400);
    }

    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .case-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--mint-50);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .case-body {
      padding: 18px 20px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .case-body h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--ink-900);
    }

    .case-body p {
      font-size: 13.5px;
      color: var(--ink-500);
      line-height: 1.65;
    }

    .case-tag {
      font-size: 12px;
      color: var(--mint-700);
      background: var(--mint-50);
      border-radius: 999px;
      padding: 3px 10px;
      width: fit-content;
      margin-top: 4px;
    }

    /* Token比价 + 服务网络 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .price-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 12px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .price-card .price-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--mint-600);
      background: var(--mint-50);
      border-radius: 999px;
      padding: 4px 12px;
      width: fit-content;
    }

    .price-card h3 {
      font-size: 18px;
      font-weight: 800;
      color: var(--ink-900);
    }

    .price-card .price-num {
      font-size: 30px;
      font-weight: 800;
      color: var(--mint-600);
      line-height: 1.1;
    }

    .price-card .price-num small {
      font-size: 13px;
      color: var(--ink-400);
      font-weight: 500;
    }

    .price-card ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13.5px;
      color: var(--ink-600);
    }

    .price-card ul li::before {
      content: "·";
      color: var(--mint-500);
      font-weight: 800;
      margin-right: 6px;
    }

    /* 表单 */
    .form-wrap {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

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

    .form-field.full {
      grid-column: 1 / -1;
    }

    .form-field label {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--ink-700);
    }

    .form-field label .required {
      color: #d9534f;
      margin-left: 2px;
    }

    .form-field input,
    .form-field select,
    .form-field textarea {
      width: 100%;
      border: 1px solid var(--ink-100);
      border-radius: var(--radius-sm);
      padding: 11px 14px;
      font-size: 14px;
      font-family: inherit;
      color: var(--ink-800);
      background: var(--paper);
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .form-field input:focus,
    .form-field select:focus,
    .form-field textarea:focus {
      outline: none;
      border-color: var(--mint-400);
      background: var(--white);
      box-shadow: 0 0 0 3px rgba(26, 157, 111, 0.12);
    }

    .form-field textarea {
      min-height: 108px;
      resize: vertical;
    }

    .form-actions {
      margin-top: 22px;
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .form-actions .btn {
      padding: 13px 36px;
    }

    .form-note {
      font-size: 12.5px;
      color: var(--ink-400);
    }

    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 840px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color 0.2s ease;
    }

    .faq-item.open {
      border-color: var(--mint-300);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 16px 20px;
      background: transparent;
      border: none;
      font-family: inherit;
      font-size: 15px;
      font-weight: 600;
      color: var(--ink-800);
      text-align: left;
      cursor: pointer;
      transition: background 0.2s ease;
    }

    .faq-question:hover {
      background: var(--mint-50);
    }

    .faq-icon {
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: var(--mint-50);
      color: var(--mint-600);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      transition: transform 0.25s ease, background 0.25s ease;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--mint-500);
      color: #fff;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 20px;
    }

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

    .faq-answer p {
      font-size: 14px;
      color: var(--ink-600);
      line-height: 1.75;
    }

    /* 文章列表 / 最新文章 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }

    .article-card {
      background: var(--white);
      border: 1px solid var(--mint-100);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 8px;
      text-decoration: none;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .article-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .article-card h3 {
      font-size: 15px;
      font-weight: 700;
      color: var(--ink-800);
      line-height: 1.5;
    }

    .article-card p {
      font-size: 13px;
      color: var(--ink-400);
      line-height: 1.6;
    }

    .article-card .read-more {
      font-size: 12.5px;
      color: var(--mint-600);
      font-weight: 600;
      margin-top: 4px;
    }

    /* 友情链接 */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      justify-content: center;
      align-items: center;
    }

    .friend-links a {
      font-size: 13.5px;
      color: var(--ink-600);
      text-decoration: none;
      padding: 6px 14px;
      border: 1px solid var(--ink-100);
      border-radius: 999px;
      background: var(--white);
      transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    }

    .friend-links a:hover {
      color: var(--mint-700);
      border-color: var(--mint-300);
      background: var(--mint-50);
    }

    /* 页脚 */
    .site-footer {
      background: #0f2a20;
      color: #b8d8c9;
      padding: 48px 0 24px;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 32px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-brand .brand-text {
      color: #ffffff;
      font-size: 18px;
    }

    .footer-brand p {
      color: #8fb8a6;
      font-size: 13.5px;
      line-height: 1.7;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 14px;
      letter-spacing: 0.02em;
    }

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

    .footer-col ul li a {
      color: #a3c4b4;
      text-decoration: none;
      font-size: 13.5px;
      transition: color 0.2s ease;
    }

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

    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13.5px;
      color: #a3c4b4;
    }

    .footer-contact .qr-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 4px;
    }

    .footer-contact .qr-row img {
      width: 72px;
      height: 72px;
      border-radius: 8px;
      background: #fff;
      padding: 4px;
      object-fit: contain;
      display: block;
    }

    .footer-bottom {
      padding-top: 20px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 12.5px;
      color: #7da392;
    }

    .footer-bottom a {
      color: #a3c4b4;
      text-decoration: none;
    }

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

    /* 浮动客服 & 返回顶部 */
    .float-actions {
      position: fixed;
      right: 18px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 90;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: none;
      background: var(--white);
      color: var(--ink-700);
      box-shadow: 0 6px 20px rgba(20, 34, 28, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
      font-size: 18px;
      text-decoration: none;
    }

    .float-btn:hover {
      transform: translateY(-3px);
      background: var(--mint-500);
      color: #fff;
    }

    .float-btn.service {
      background: var(--mint-500);
      color: #fff;
    }

    .float-btn.service:hover {
      background: var(--mint-600);
    }

    .back-top {
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease, transform 0.2s ease;
    }

    .back-top.show {
      opacity: 1;
      pointer-events: auto;
    }

    .service-pop {
      position: fixed;
      right: 18px;
      bottom: 84px;
      background: #fff;
      border-radius: 16px;
      box-shadow: var(--shadow-lg);
      padding: 16px;
      width: 200px;
      text-align: center;
      z-index: 95;
      border: 1px solid var(--mint-100);
      display: none;
      flex-direction: column;
      gap: 8px;
      font-size: 13px;
      color: var(--ink-600);
    }

    .service-pop.show {
      display: flex;
    }

    .service-pop img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      margin: 0 auto;
      display: block;
      border-radius: 8px;
    }

    .service-pop .close-pop {
      font-size: 12px;
      color: var(--mint-600);
      cursor: pointer;
      font-weight: 600;
    }

    /* 动画 */
    @keyframes floatIn {
      from {
        opacity: 0;
        transform: translateY(18px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .reveal {
      opacity: 0;
      transform: translateY(22px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 响应式 */
    @media (max-width: 980px) {
      .hero-top {
        grid-template-columns: 1fr;
      }

      .hero-panel {
        max-width: 560px;
      }

      .about-grid {
        grid-template-columns: 1fr;
      }

      .metrics {
        grid-template-columns: repeat(2, 1fr);
      }

      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .steps {
        grid-template-columns: repeat(2, 1fr);
      }

      .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .case-grid {
        grid-template-columns: 1fr;
      }

      .price-grid {
        grid-template-columns: 1fr;
      }

      .article-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .nav-links {
        display: none;
      }

      .nav-actions .btn-outline {
        display: none;
      }

      .mobile-toggle {
        display: flex;
      }

      .nav-actions .btn-primary {
        padding: 9px 16px;
        font-size: 13px;
      }
    }

    @media (max-width: 640px) {
      .hero {
        padding: 40px 0 48px;
      }

      .hero-stats {
        gap: 18px 24px;
      }

      .hero-stat strong {
        font-size: 19px;
      }

      .section {
        padding: 48px 0;
      }

      .metrics {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
      }

      .metric-card {
        padding: 18px 12px;
      }

      .metric-card strong {
        font-size: 24px;
      }

      .service-grid {
        grid-template-columns: 1fr;
      }

      .steps {
        grid-template-columns: 1fr;
      }

      .review-grid {
        grid-template-columns: 1fr;
      }

      .article-grid {
        grid-template-columns: 1fr;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }

      .form-wrap {
        padding: 22px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .rating-banner {
        padding: 18px 16px;
      }

      .rating-banner .score {
        font-size: 28px;
      }

      .brand-text {
        font-size: 16px;
      }

      .nav-actions .btn-primary {
        padding: 8px 14px;
        font-size: 12.5px;
      }

      .hero-actions .btn {
        flex: 1 1 auto;
      }

      .float-actions {
        right: 12px;
        bottom: 16px;
      }

      .float-btn {
        width: 44px;
        height: 44px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }
      .reveal {
        opacity: 1;
        transform: none;
        transition: none;
      }
      .hero-panel {
        animation: none;
      }
      * {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
      }
    }