:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --primary: #4338ca;
      --primary-light: #6366f1;
      --accent: #0ea5e9;
      --border-color: #e2e8f0;
      
      --holo-gradient: linear-gradient(135deg, #e0e7ff 0%, #fae8ff 35%, #e0f2fe 70%, #fef3c7 100%);
      --holo-border: linear-gradient(135deg, #818cf8, #c084fc, #38bdf8, #f472b6);
      --holo-btn: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #0284c7 100%);
      --holo-glow: 0 10px 30px -10px rgba(99, 102, 241, 0.25);
      
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 10%, rgba(217, 70, 239, 0.06) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(14, 165, 233, 0.05) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(168, 85, 247, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-logo-wrap {
      max-width: 140px;
      display: flex;
      align-items: center;
    }

    .brand-logo-wrap img {
      max-height: 44px;
      width: auto;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      position: relative;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.06);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
      white-space: nowrap;
    }

    .btn-holo {
      background: var(--holo-btn);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
      position: relative;
      overflow: hidden;
    }

    .btn-holo::after {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.3), transparent);
      transform: rotate(30deg);
      transition: 0.6s;
      opacity: 0;
    }

    .btn-holo:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    }

    .btn-holo:hover::after {
      opacity: 1;
      left: 100%;
    }

    .btn-outline {
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary-light);
      color: var(--primary);
      background: rgba(99, 102, 241, 0.04);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 通用区块排版 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .badge-holo {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--holo-gradient);
      border-radius: 9999px;
      border: 1px solid rgba(168, 85, 247, 0.3);
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero - 严格无图纯 CSS 构建 */
    .hero-section {
      padding: 90px 0 70px 0;
      position: relative;
      text-align: center;
      overflow: hidden;
    }

    .hero-holo-bg {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 800px;
      height: 480px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.18) 0%, rgba(56, 189, 248, 0.15) 40%, rgba(244, 114, 182, 0.1) 70%, transparent 100%);
      filter: blur(60px);
      z-index: 0;
      pointer-events: none;
      border-radius: 50%;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 22px;
      letter-spacing: -1px;
    }

    .hero-gradient-text {
      background: linear-gradient(135deg, #4338ca 0%, #7c3aed 40%, #0284c7 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 740px;
      margin: 0 auto 34px auto;
      line-height: 1.8;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .btn-hero-main {
      padding: 14px 34px;
      font-size: 1.1rem;
      box-shadow: 0 10px 25px rgba(79, 70, 229, 0.35);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .stat-holo-card {
      background: rgba(255, 255, 255, 0.75);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
      transition: transform 0.3s ease, border-color 0.3s ease;
      position: relative;
    }

    .stat-holo-card:hover {
      transform: translateY(-4px);
      border-color: rgba(129, 140, 248, 0.6);
      box-shadow: var(--holo-glow);
    }

    .stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      display: flex;
      align-items: baseline;
      justify-content: center;
      gap: 2px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 平台核心架构与模型聚合云 */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s ease;
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    }

    .model-chip:hover {
      color: var(--primary);
      border-color: var(--primary-light);
      background: rgba(99, 102, 241, 0.04);
      transform: translateY(-2px);
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

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

    .card-holo {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid var(--border-color);
      position: relative;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
      display: flex;
      flex-direction: column;
    }

    .card-holo:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 36px rgba(99, 102, 241, 0.12);
      border-color: rgba(168, 85, 247, 0.4);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--holo-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 1.4rem;
      border: 1px solid rgba(192, 132, 252, 0.3);
      color: var(--primary);
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .card-tag {
      margin-top: 16px;
      display: inline-block;
      font-size: 0.8rem;
      color: var(--primary-light);
      font-weight: 600;
    }

    /* 流程步骤 */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
      text-align: center;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--holo-btn);
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px auto;
      font-size: 1rem;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测高亮板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(245,243,255,0.9) 100%);
      border: 2px solid transparent;
      border-image: var(--holo-border) 1;
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 10px 30px rgba(99, 102, 241, 0.08);
      flex-wrap: wrap;
      gap: 24px;
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-big-score {
      font-size: 3.6rem;
      font-weight: 900;
      color: #4338ca;
      line-height: 1;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      margin-bottom: 4px;
    }

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

    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .eval-table .highlight-col {
      background: rgba(99, 102, 241, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 案例展示 */
    .case-media-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-img-wrap.aspect-square {
      aspect-ratio: 1 / 1;
    }

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

    .case-media-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 22px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    /* 客户评价板块 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .review-card::before {
      content: "“";
      position: absolute;
      top: 14px;
      right: 20px;
      font-size: 3rem;
      color: rgba(99, 102, 241, 0.1);
      font-family: serif;
      line-height: 1;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--holo-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      border: 1px solid rgba(168, 85, 247, 0.3);
    }

    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 需求表单 */
    .form-wrapper {
      max-width: 720px;
      margin: 0 auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: 0 10px 30px rgba(0,0,0,0.04);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
      background: #fafafa;
    }

    .form-control:focus {
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
      background: #fff;
    }

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

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--text-main);
    }

    .faq-header:hover {
      background: rgba(99, 102, 241, 0.02);
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: rgba(99, 102, 241, 0.4);
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.06);
    }

    .faq-item.active .faq-body {
      max-height: 400px;
      padding-bottom: 20px;
    }

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

    /* 资讯与百科文章 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .article-card-link {
      background: #ffffff;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
    }

    .article-card-link:hover {
      border-color: var(--primary-light);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 70px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      margin-bottom: 14px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.9rem;
    }

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

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
      font-size: 0.9rem;
    }

    .footer-qr-wrap {
      margin-top: 14px;
      display: inline-block;
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      max-width: 110px;
    }

    .footer-qr-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.88rem;
    }

    .friend-links-box {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid #1e293b;
      font-size: 0.88rem;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .friend-links-box a {
      color: #94a3b8;
    }

    .friend-links-box a:hover {
      color: #cbd5e1;
    }

    /* 浮动客服入口 */
    .floating-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .kefu-trigger-btn {
      width: 52px;
      height: 52px;
      background: var(--holo-btn);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
      cursor: pointer;
      position: relative;
      transition: transform 0.3s;
    }

    .kefu-trigger-btn:hover {
      transform: scale(1.08);
    }

    .kefu-popover {
      position: absolute;
      bottom: 64px;
      right: 0;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      width: 200px;
      text-align: center;
      display: none;
    }

    .kefu-popover.show {
      display: block;
    }

    .kefu-popover img {
      width: 120px;
      height: 120px;
      margin: 0 auto 8px auto;
      display: block;
    }

    .kefu-popover p {
      font-size: 0.82rem;
      color: var(--text-sub);
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 2.4rem;
      }
      .grid-3, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4, .steps-row, .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        display: block;
        padding: 12px 0;
      }
      .nav-actions {
        display: none;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-lead {
        font-size: 1rem;
      }
      .grid-3, .grid-2, .grid-4, .review-grid, .steps-row, .hero-stats-grid, .article-links-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }