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

    :root {
      --lime: #c8f04a;
      --lime-dark: #a8d42e;
      --lime-glow: rgba(200, 240, 74, 0.35);
      --ink: #151a12;
      --ink-soft: #3c443a;
      --gray-bg: #f5f7f0;
      --card-bg: #ffffff;
      --border-light: #e4e9da;
      --shadow-sm: 0 4px 16px rgba(30, 40, 20, 0.06);
      --shadow-md: 0 12px 32px rgba(30, 40, 20, 0.08);
      --radius: 20px;
      --radius-sm: 12px;
      --container: 1200px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    body {
      font-family: var(--font);
      background: var(--gray-bg);
      color: var(--ink);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ===== 动画 ===== */
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1), transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @keyframes floatY {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }
    @keyframes pulseGlow {
      0%, 100% { box-shadow: 0 0 0 0 var(--lime-glow); }
      50% { box-shadow: 0 0 0 14px transparent; }
    }
    @keyframes shimmer {
      0% { background-position: -200% center; }
      100% { background-position: 200% center; }
    }

    /* ===== 顶部导航 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 90;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      text-decoration: none;
      color: var(--ink);
      font-weight: 800;
      font-size: 1.2rem;
      letter-spacing: -0.3px;
    }
    .brand .ai-page-logo {
      height: 36px;
      width: auto;
      display: block;
    }
    .brand-mark {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--lime);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1rem;
      color: var(--ink);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
      flex-wrap: wrap;
    }
    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--ink-soft);
      text-decoration: none;
      font-size: 0.92rem;
      font-weight: 500;
      border-radius: 8px;
      transition: background 0.2s, color 0.2s;
    }
    .nav-links li a:hover {
      background: var(--lime);
      color: var(--ink);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--ink);
      color: #fff;
      padding: 10px 20px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.88rem;
      text-decoration: none;
      transition: background 0.2s, transform 0.15s;
      flex-shrink: 0;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: #2b3327;
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1.5px solid var(--ink);
      border-radius: 10px;
      padding: 6px 10px;
      font-size: 1.3rem;
      cursor: pointer;
      color: var(--ink);
      line-height: 1;
    }

    @media (max-width: 1024px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 12px 24px 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-md);
        gap: 2px;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li a {
        padding: 12px 8px;
        font-size: 1rem;
        border-radius: 10px;
      }
      .menu-toggle {
        display: block;
      }
      .nav-cta {
        display: none;
      }
    }

    /* ===== HERO 首屏 ===== */
    .hero {
      position: relative;
      overflow: hidden;
      background: linear-gradient(135deg, #f4fae8 0%, #ffffff 40%, #eef7d0 75%, #f9fdf0 100%);
      padding: 80px 0 70px;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -140px;
      right: -120px;
      width: 520px;
      height: 520px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(200, 240, 74, 0.3) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -100px;
      left: -80px;
      width: 380px;
      height: 380px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(200, 240, 74, 0.18) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(200, 240, 74, 0.45);
      border: 1px solid var(--lime);
      border-radius: 40px;
      padding: 6px 16px;
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 22px;
      letter-spacing: 0.4px;
    }
    .hero-badge .dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #2d7a1e;
      animation: pulseGlow 2.2s infinite;
    }
    .hero h1 {
      font-size: clamp(2rem, 4.4vw, 3.4rem);
      font-weight: 900;
      line-height: 1.18;
      letter-spacing: -1.5px;
      margin-bottom: 18px;
    }
    .hero h1 .highlight {
      background: linear-gradient(120deg, var(--lime-dark) 0%, var(--lime) 60%, #d8f96a 100%);
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline;
    }
    .hero-desc {
      font-size: 1.06rem;
      color: var(--ink-soft);
      max-width: 500px;
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      align-items: center;
      margin-bottom: 34px;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--ink);
      color: #fff;
      padding: 15px 30px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 1rem;
      text-decoration: none;
      border: 2px solid var(--ink);
      transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: #2b3327;
      transform: translateY(-2px);
      box-shadow: 0 10px 26px rgba(20, 26, 18, 0.25);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      color: var(--ink);
      padding: 14px 28px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.96rem;
      text-decoration: none;
      border: 2px solid var(--lime);
      transition: background 0.2s, transform 0.15s, border-color 0.2s;
      white-space: nowrap;
    }
    .btn-outline:hover {
      background: var(--lime);
      border-color: var(--lime-dark);
      transform: translateY(-2px);
    }
    .hero-metrics {
      display: flex;
      gap: 34px;
      flex-wrap: wrap;
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
    }
    .hero-metric .num {
      font-size: 1.5rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      color: var(--ink);
    }
    .hero-metric .num span {
      color: #3f7a1f;
    }
    .hero-metric .label {
      font-size: 0.82rem;
      color: var(--ink-soft);
      margin-top: 2px;
    }

    /* 首屏右侧纯CSS视觉 */
    .hero-visual {
      position: relative;
      min-height: 370px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .orbit-ring {
      position: absolute;
      border-radius: 50%;
      border: 1.5px dashed rgba(168, 212, 46, 0.45);
    }
    .ring-1 {
      width: 300px;
      height: 300px;
      animation: spinSlow 28s linear infinite;
    }
    .ring-2 {
      width: 220px;
      height: 220px;
      animation: spinSlow 20s linear infinite reverse;
    }
    @keyframes spinSlow {
      to { transform: rotate(360deg); }
    }
    .orbit-ring::after {
      content: '';
      position: absolute;
      top: -5px;
      left: 50%;
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--lime-dark);
    }
    .core-badge {
      width: 160px;
      height: 160px;
      border-radius: 50%;
      background: radial-gradient(circle at 35% 30%, #f0ffca, #c8f04a 50%, #9bc42b 100%);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 18px 50px rgba(160, 200, 40, 0.4);
      animation: floatY 4.5s ease-in-out infinite;
      z-index: 2;
    }
    .core-badge .big {
      font-size: 2rem;
      font-weight: 900;
      color: #1c2a0a;
      letter-spacing: -1px;
    }
    .core-badge .small {
      font-size: 0.72rem;
      font-weight: 700;
      color: #364d13;
      letter-spacing: 1px;
    }
    .float-chip {
      position: absolute;
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 40px;
      padding: 8px 18px;
      font-size: 0.82rem;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      white-space: nowrap;
      z-index: 3;
    }
    .chip-1 { top: 6%; left: 0; animation: floatY 5s ease-in-out infinite; }
    .chip-2 { bottom: 8%; right: 0; animation: floatY 6s ease-in-out infinite 0.8s; }
    .chip-3 { top: 50%; left: -4%; animation: floatY 5.5s ease-in-out infinite 0.4s; }

    @media (max-width: 860px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .hero-visual {
        min-height: 280px;
        order: -1;
      }
      .ring-1 { width: 230px; height: 230px; }
      .ring-2 { width: 170px; height: 170px; }
      .core-badge { width: 120px; height: 120px; }
      .core-badge .big { font-size: 1.5rem; }
      .chip-1 { left: 2%; }
      .chip-3 { display: none; }
    }
    @media (max-width: 520px) {
      .hero { padding: 50px 0 50px; }
      .hero-actions .btn-primary,
      .hero-actions .btn-outline { flex: 1 1 100%; justify-content: center; }
      .hero-metrics { gap: 20px; }
      .hero-visual { min-height: 240px; }
      .ring-1 { width: 190px; height: 190px; }
      .ring-2 { width: 140px; height: 140px; }
      .core-badge { width: 100px; height: 100px; }
      .core-badge .big { font-size: 1.2rem; }
      .core-badge .small { font-size: 0.6rem; }
    }

    /* ===== 通用 section ===== */
    section {
      padding: 68px 0;
    }
    .section-label {
      display: inline-block;
      background: var(--lime);
      color: var(--ink);
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 14px;
      border-radius: 30px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: clamp(1.7rem, 3vw, 2.4rem);
      font-weight: 900;
      letter-spacing: -0.8px;
      line-height: 1.22;
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--ink-soft);
      max-width: 640px;
      font-size: 1rem;
      margin-bottom: 36px;
      line-height: 1.7;
    }

    /* ===== 数据卡片 ===== */
    .stat-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 18px;
    }
    .stat-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 26px 24px;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-card .num {
      font-size: 2rem;
      font-weight: 900;
      letter-spacing: -1px;
      color: var(--ink);
    }
    .stat-card .num em {
      font-style: normal;
      color: var(--lime-dark);
    }
    .stat-card .label {
      font-size: 0.88rem;
      color: var(--ink-soft);
      margin-top: 4px;
    }

    /* ===== 服务能力 ===== */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 28px 24px;
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--lime);
    }
    .service-icon {
      width: 46px;
      height: 46px;
      border-radius: 13px;
      background: var(--lime);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: 900;
    }
    .service-card h3 {
      font-size: 1.08rem;
      font-weight: 800;
      letter-spacing: -0.3px;
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--ink-soft);
      line-height: 1.65;
      flex: 1;
    }

    /* ===== 流程步骤 ===== */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 18px;
      counter-reset: step;
    }
    .process-step {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 26px 22px;
      position: relative;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .process-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .step-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--lime-dark);
      line-height: 1;
      margin-bottom: 10px;
    }
    .process-step h3 {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: 6px;
    }
    .process-step p {
      font-size: 0.86rem;
      color: var(--ink-soft);
      line-height: 1.6;
    }

    /* ===== 对比评测 ===== */
    .compare-wrap {
      background: #fff;
      border-radius: var(--radius);
      border: 1px solid var(--border-light);
      overflow: hidden;
    }
    .compare-highlight {
      background: linear-gradient(135deg, #f4fae8, #eef7d0);
      padding: 30px 28px;
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
      border-bottom: 1px solid var(--border-light);
    }
    .compare-score {
      display: flex;
      align-items: baseline;
      gap: 6px;
    }
    .compare-score .big {
      font-size: 3rem;
      font-weight: 900;
      letter-spacing: -2px;
      color: #2d6b12;
      line-height: 1;
    }
    .compare-score .denom {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--ink-soft);
    }
    .compare-stars {
      color: #d9a400;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }
    .compare-badge {
      background: var(--ink);
      color: #fff;
      padding: 6px 18px;
      border-radius: 40px;
      font-size: 0.85rem;
      font-weight: 700;
      white-space: nowrap;
    }
    .table-scroll {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 640px;
      font-size: 0.9rem;
    }
    .compare-table th,
    .compare-table td {
      padding: 15px 22px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
      vertical-align: top;
    }
    .compare-table th {
      background: #fafcf6;
      font-weight: 800;
      font-size: 0.88rem;
      color: var(--ink);
      white-space: nowrap;
    }
    .compare-table td:first-child {
      font-weight: 600;
      color: var(--ink);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table .yes {
      color: #2d6b12;
      font-weight: 700;
    }
    .compare-table .partial {
      color: #92700a;
      font-weight: 600;
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .faq-item.open {
      border-color: var(--lime);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      background: none;
      border: none;
      font-size: 0.98rem;
      font-weight: 700;
      color: var(--ink);
      text-align: left;
      cursor: pointer;
      font-family: var(--font);
      line-height: 1.5;
    }
    .faq-question .icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--lime);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      font-weight: 700;
      transition: transform 0.3s;
    }
    .faq-item.open .faq-question .icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-answer-inner {
      padding: 0 22px 20px;
      color: var(--ink-soft);
      font-size: 0.9rem;
      line-height: 1.7;
    }

    /* ===== 用户评论 ===== */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 18px;
    }
    .review-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 26px 24px;
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #d9a400;
      font-size: 0.9rem;
      letter-spacing: 2px;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--ink-soft);
      line-height: 1.7;
      flex: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--lime), #e6ffa0);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
      color: #2c3d12;
      flex-shrink: 0;
    }
    .review-name {
      font-weight: 700;
      font-size: 0.9rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: var(--ink-soft);
    }

    /* ===== 案例 & 文章 ===== */
    .case-article-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 24px;
      align-items: start;
    }
    .case-panel {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
    }
    .case-panel img {
      width: 100%;
      height: auto;
      display: block;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      background: #eef2e4;
    }
    .case-body {
      padding: 22px 24px;
    }
    .case-body h3 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
      letter-spacing: -0.3px;
    }
    .case-body p {
      font-size: 0.9rem;
      color: var(--ink-soft);
      line-height: 1.65;
    }
    .article-panel {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 26px 24px;
    }
    .article-panel h3 {
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 18px;
    }
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .article-list li a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 11px 8px;
      border-radius: 10px;
      text-decoration: none;
      color: var(--ink);
      font-size: 0.9rem;
      font-weight: 500;
      transition: background 0.18s, padding-left 0.18s;
      line-height: 1.5;
    }
    .article-list li a:hover {
      background: #f5fae9;
      padding-left: 14px;
    }
    .article-list li a .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--lime-dark);
      flex-shrink: 0;
    }

    @media (max-width: 820px) {
      .case-article-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===== 表单 ===== */
    .form-section {
      background: linear-gradient(135deg, #f4fae8, #ffffff 60%, #f7fce9);
    }
    .form-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
      background: #fff;
      border-radius: var(--radius);
      border: 1px solid var(--border-light);
      padding: 42px 40px;
      box-shadow: var(--shadow-sm);
    }
    .form-info h2 {
      font-size: clamp(1.5rem, 2.6vw, 2rem);
      font-weight: 900;
      letter-spacing: -0.6px;
      margin-bottom: 14px;
      line-height: 1.25;
    }
    .form-info p {
      color: var(--ink-soft);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 22px;
    }
    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .contact-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--ink-soft);
    }
    .contact-list li .tag {
      background: var(--lime);
      color: var(--ink);
      font-weight: 700;
      font-size: 0.75rem;
      padding: 2px 10px;
      border-radius: 20px;
      flex-shrink: 0;
      margin-top: 1px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--ink);
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1.5px solid var(--border-light);
      border-radius: 10px;
      font-size: 0.92rem;
      font-family: var(--font);
      color: var(--ink);
      background: #fcfdfa;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--lime-dark);
      box-shadow: 0 0 0 3px rgba(200, 240, 74, 0.3);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 90px;
    }
    .form-submit {
      width: 100%;
      background: var(--ink);
      color: #fff;
      border: none;
      padding: 14px;
      border-radius: 50px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      font-family: var(--font);
      transition: background 0.2s, transform 0.15s;
      margin-top: 6px;
    }
    .form-submit:hover {
      background: #2b3327;
      transform: translateY(-1px);
    }

    @media (max-width: 820px) {
      .form-wrap {
        grid-template-columns: 1fr;
        padding: 30px 24px;
      }
    }

    /* ===== 标签云 / 友情链接 ===== */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag-cloud a {
      display: inline-block;
      padding: 8px 18px;
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 40px;
      text-decoration: none;
      color: var(--ink-soft);
      font-size: 0.84rem;
      font-weight: 500;
      transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
    }
    .tag-cloud a:hover {
      background: var(--lime);
      border-color: var(--lime);
      color: var(--ink);
      transform: translateY(-2px);
    }

    /* ===== 二维码区域 ===== */
    .qr-box {
      display: flex;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
    }
    .qr-box img {
      width: 110px;
      height: 110px;
      object-fit: contain;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      background: #fff;
      padding: 4px;
    }
    .qr-text {
      font-size: 0.9rem;
      color: var(--ink-soft);
    }
    .qr-text strong {
      display: block;
      color: var(--ink);
      font-size: 1rem;
      margin-bottom: 4px;
    }

    /* ===== FOOTER ===== */
    .site-footer {
      background: #1a1f16;
      color: #cdd6c4;
      padding: 52px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 38px;
    }
    .footer-brand .brand {
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand .brand .brand-mark {
      background: var(--lime);
      color: #1a1f16;
    }
    .footer-brand p {
      font-size: 0.86rem;
      color: #a8b3a0;
      line-height: 1.7;
      max-width: 300px;
    }
    .footer-col h4 {
      font-size: 0.92rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
      letter-spacing: 0.3px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col ul li a {
      color: #a8b3a0;
      text-decoration: none;
      font-size: 0.86rem;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: var(--lime);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: #8a9681;
    }
    .footer-bottom a {
      color: #a8b3a0;
      text-decoration: none;
    }
    .footer-bottom a:hover {
      color: var(--lime);
    }
    @media (max-width: 820px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }
    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===== 浮动客服 & 返回顶部 ===== */
    .float-actions {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #fff;
      border: 1.5px solid var(--lime);
      box-shadow: 0 6px 18px rgba(30, 40, 20, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      text-decoration: none;
      color: var(--ink);
      font-size: 1.1rem;
      transition: background 0.2s, transform 0.15s;
    }
    .float-btn:hover {
      background: var(--lime);
      transform: translateY(-2px);
    }
    .float-btn.back-top {
      font-size: 1.2rem;
    }

    .kefu-pop {
      position: fixed;
      right: 80px;
      bottom: 28px;
      z-index: 100;
      background: #fff;
      border-radius: 16px;
      box-shadow: 0 12px 40px rgba(20, 30, 10, 0.18);
      padding: 18px;
      width: 200px;
      display: none;
      text-align: center;
      border: 1px solid var(--border-light);
    }
    .kefu-pop.show {
      display: block;
    }
    .kefu-pop img {
      width: 150px;
      height: 150px;
      object-fit: contain;
      border-radius: 8px;
    }
    .kefu-pop p {
      font-size: 0.8rem;
      color: var(--ink-soft);
      margin-top: 8px;
    }
    @media (max-width: 520px) {
      .kefu-pop {
        right: 20px;
        bottom: 150px;
      }
    }

    /* 服务网络 */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 14px;
    }
    .network-item {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 18px 16px;
      text-align: center;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--ink-soft);
      transition: border-color 0.2s, transform 0.2s;
    }
    .network-item:hover {
      border-color: var(--lime);
      transform: translateY(-3px);
    }

    /* 价格参考 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 18px;
    }
    .price-card {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 26px 22px;
      text-align: center;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .price-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .price-card h3 {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--ink-soft);
      margin-bottom: 10px;
    }
    .price-card .price {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--ink);
      letter-spacing: -1px;
    }
    .price-card .price small {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--ink-soft);
    }
    .price-card .note {
      font-size: 0.8rem;
      color: var(--ink-soft);
      margin-top: 8px;
      line-height: 1.5;
    }

    /* 模型展示 */
    .model-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
      margin-top: 6px;
    }
    .model-cloud span {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 40px;
      padding: 6px 16px;
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--ink-soft);
      transition: background 0.2s, border-color 0.2s;
    }
    .model-cloud span:hover {
      background: var(--lime);
      border-color: var(--lime);
      color: var(--ink);
    }