:root {
      --primary-cyan: #0fa4af;
      --deep-cyan: #024959;
      --light-cyan: #e8f7f8;
      --accent-cyan: #058296;
      --bg-gradient: linear-gradient(180deg, #f3fafb 0%, #ffffff 100%);
      --text-main: #1d2a30;
      --text-muted: #536b75;
      --card-bg: #ffffff;
      --border-color: #d8e8ea;
      --border-focus: #0fa4af;
      --shadow-sm: 0 4px 14px rgba(2, 73, 89, 0.05);
      --shadow-md: 0 10px 30px rgba(2, 73, 89, 0.08);
      --shadow-hover: 0 16px 40px rgba(15, 164, 175, 0.16);
      --radius: 12px;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--bg-gradient);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      min-width: 320px;
    }

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid #ebf4f5;
    }

    .section-header {
      text-align: center;
      margin-bottom: 44px;
    }

    .section-tag {
      display: inline-block;
      background: var(--light-cyan);
      color: var(--accent-cyan);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 5px 14px;
      border-radius: 20px;
      margin-bottom: 10px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--deep-cyan);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.02rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #dff0f2;
      transition: all 0.3s ease;
    }

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

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

    .brand-logo img {
      height: 38px;
      width: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      font-size: 0.94rem;
      color: var(--text-main);
      font-weight: 500;
      padding: 6px 14px;
      border-radius: 6px;
      transition: background 0.2s, color 0.2s;
    }

    .nav-links a:hover {
      color: var(--primary-cyan);
      background: var(--light-cyan);
    }

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

    .btn-nav {
      background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--accent-cyan) 100%);
      color: #ffffff !important;
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(15, 164, 175, 0.25);
    }

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

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--deep-cyan);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 首屏纯文字与几何美学 */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 80% 20%, #ddf6f8 0%, #f4fbfa 50%, #ffffff 100%);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 7px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      color: var(--accent-cyan);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.28;
      font-weight: 800;
      color: var(--deep-cyan);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 34px;
    }

    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-main {
      background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--accent-cyan) 100%);
      color: #ffffff;
      padding: 13px 32px;
      border-radius: 8px;
      font-size: 1.05rem;
      font-weight: 600;
      box-shadow: 0 6px 20px rgba(15, 164, 175, 0.32);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(15, 164, 175, 0.4);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--deep-cyan);
      padding: 13px 28px;
      border-radius: 8px;
      font-size: 1.05rem;
      font-weight: 600;
      transition: all 0.2s ease;
    }

    .btn-outline:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
      background: #fafefe;
    }

    .stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .stat-box {
      text-align: center;
      padding: 10px;
      border-right: 1px dashed var(--border-color);
    }

    .stat-box:last-child {
      border-right: none;
    }

    .stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1.2;
      margin-bottom: 4px;
    }

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

    /* 平台介绍 */
    .platform-intro-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 34px;
      box-shadow: var(--shadow-sm);
    }

    .intro-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 22px;
      margin-top: 24px;
    }

    .intro-item {
      padding: 20px;
      background: var(--light-cyan);
      border-radius: 8px;
      border-left: 4px solid var(--primary-cyan);
    }

    .intro-item h4 {
      font-size: 1.05rem;
      color: var(--deep-cyan);
      margin-bottom: 8px;
    }

    .intro-item p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 服务与能力网格 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: transform 0.25s, box-shadow 0.25s;
    }

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

    .service-icon-label {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent-cyan);
      background: #e6f6f7;
      padding: 3px 10px;
      border-radius: 12px;
      display: inline-block;
      margin-bottom: 12px;
    }

    .service-card h3 {
      font-size: 1.15rem;
      color: var(--deep-cyan);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵标签 */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 28px;
    }

    .model-badge {
      background: #ffffff;
      border: 1px solid #d4ebed;
      color: var(--deep-cyan);
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 500;
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }

    .model-badge:hover {
      background: var(--light-cyan);
      border-color: var(--primary-cyan);
      transform: translateY(-2px);
    }

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

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 26px 20px;
      position: relative;
    }

    .process-step {
      width: 38px;
      height: 38px;
      background: var(--primary-cyan);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      border-radius: 50%;
      margin-bottom: 16px;
    }

    .process-card h4 {
      font-size: 1.05rem;
      color: var(--deep-cyan);
      margin-bottom: 8px;
    }

    .process-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 视觉媒体展示区 */
    .media-showcase {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 22px;
      align-items: center;
    }

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

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

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

    .media-caption {
      padding: 14px 18px;
      background: #ffffff;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--deep-cyan);
      border-top: 1px solid #eff5f6;
    }

    /* 案例横幅展区 */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-top: 24px;
    }

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

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

    /* 对比评测模块 */
    .review-score-board {
      background: linear-gradient(135deg, var(--deep-cyan) 0%, #063c46 100%);
      color: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 24px;
    }

    .score-left h3 {
      font-size: 1.6rem;
      margin-bottom: 6px;
    }

    .score-left p {
      color: #b2dfe3;
      font-size: 0.95rem;
    }

    .score-right {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .score-stars {
      color: #ffbf00;
      font-size: 1.4rem;
    }

    .score-val {
      font-size: 3rem;
      font-weight: 800;
      color: #ffffff;
      line-height: 1;
    }

    .score-max {
      font-size: 1.1rem;
      color: #b2dfe3;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #ebf4f5;
      font-size: 0.92rem;
    }

    .compare-table th {
      background: #f7fcfe;
      color: var(--deep-cyan);
      font-weight: 700;
    }

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

    .highlight-col {
      background: #f0fafb;
      font-weight: 600;
      color: var(--primary-cyan);
    }

    /* 真实用户评价 */
    .comments-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

    .comment-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .comment-text {
      font-size: 0.94rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .comment-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .author-avatar-text {
      width: 42px;
      height: 42px;
      background: var(--light-cyan);
      color: var(--accent-cyan);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .author-info h5 {
      font-size: 0.95rem;
      color: var(--deep-cyan);
      margin-bottom: 2px;
    }

    .author-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: border-color 0.2s;
    }

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

    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      color: var(--deep-cyan);
      background: #ffffff;
      user-select: none;
    }

    .faq-question:hover {
      background: #fbfefe;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s;
      color: var(--primary-cyan);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fcfefe;
      border-top: 1px solid #f0f7f8;
    }

    .faq-answer p {
      padding: 18px 22px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
    }

    /* 文章与资讯 */
    .articles-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
    }

    .article-links-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 16px;
      margin-top: 16px;
    }

    .article-link-item {
      padding: 14px 18px;
      background: #f8fcfe;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.92rem;
      color: var(--deep-cyan);
      display: flex;
      align-items: center;
      gap: 10px;
      transition: all 0.2s;
    }

    .article-link-item:hover {
      background: var(--light-cyan);
      border-color: var(--primary-cyan);
      color: var(--accent-cyan);
    }

    /* 需求表单与联系 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 32px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .contact-details {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-card-box {
      background: var(--light-cyan);
      padding: 20px;
      border-radius: 8px;
      border-left: 4px solid var(--primary-cyan);
    }

    .contact-card-box h4 {
      font-size: 1rem;
      color: var(--deep-cyan);
      margin-bottom: 6px;
    }

    .contact-card-box p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .contact-qr-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #fcfefe;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: 8px;
    }

    .contact-qr-wrap img {
      width: 90px;
      height: 90px;
      border-radius: 6px;
      display: block;
    }

    .qr-text h5 {
      font-size: 0.95rem;
      color: var(--deep-cyan);
      margin-bottom: 4px;
    }

    .qr-text p {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--deep-cyan);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.92rem;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(15, 164, 175, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .btn-submit {
      width: 100%;
      padding: 13px;
      background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--accent-cyan) 100%);
      color: #ffffff;
      font-size: 1rem;
      font-weight: 600;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(15, 164, 175, 0.3);
      transition: opacity 0.2s;
    }

    .btn-submit:hover {
      opacity: 0.95;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #023844;
      color: #b2dfe3;
      padding: 50px 0 24px 0;
      border-top: 1px solid #045263;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.7;
      max-width: 420px;
    }

    .footer-links-group h5 {
      color: #ffffff;
      font-size: 0.95rem;
      margin-bottom: 14px;
    }

    .footer-links-group ul li {
      margin-bottom: 8px;
    }

    .footer-links-group ul li a {
      font-size: 0.86rem;
      color: #b2dfe3;
    }

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

    .friend-links-box {
      border-top: 1px solid #054f60;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-box span {
      font-size: 0.85rem;
      color: #8bbec3;
      margin-right: 12px;
    }

    .friend-links-box a {
      font-size: 0.85rem;
      color: #b2dfe3;
      margin-right: 16px;
      display: inline-block;
      margin-bottom: 6px;
    }

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

    .footer-bottom {
      border-top: 1px solid #034554;
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #79aab0;
    }

    /* 悬浮客服挂件 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--deep-cyan);
      font-size: 1.2rem;
      position: relative;
      transition: all 0.25s ease;
    }

    .float-btn:hover {
      background: var(--light-cyan);
      color: var(--primary-cyan);
    }

    .float-qr-popup {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }

    .float-qr-popup span {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 6px;
      display: block;
    }

    .float-btn:hover .float-qr-popup {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .stat-box:nth-child(2) {
        border-right: none;
      }
      .stat-box {
        border-bottom: 1px dashed var(--border-color);
      }
      .stat-box:nth-child(3), .stat-box:nth-child(4) {
        border-bottom: none;
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-showcase {
        grid-template-columns: 1fr;
      }
      .banner-gallery {
        grid-template-columns: 1fr;
      }
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 12px;
      }
      .hero-title {
        font-size: 1.75rem;
      }
      .hero-subtitle {
        font-size: 0.98rem;
      }
      .section-wrap {
        padding: 50px 0;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .stats-bar {
        grid-template-columns: 1fr;
      }
      .stat-box {
        border-right: none;
        border-bottom: 1px dashed var(--border-color);
      }
      .stat-box:last-child {
        border-bottom: none;
      }
    }