:root {
      --bg-primary: #0d0614;
      --bg-secondary: #160b24;
      --bg-card: rgba(29, 13, 46, 0.7);
      --bg-card-hover: rgba(45, 18, 73, 0.85);
      --border-color: rgba(235, 59, 163, 0.25);
      --border-glow: rgba(0, 240, 255, 0.4);
      --text-main: #f8f6fc;
      --text-muted: #b9a9cf;
      --accent-pink: #ff2a85;
      --accent-purple: #9d4edd;
      --accent-cyan: #00f0ff;
      --gradient-brand: linear-gradient(135deg, #ff2a85 0%, #9d4edd 50%, #00f0ff 100%);
      --gradient-btn: linear-gradient(90deg, #ff2a85, #7928ca);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-sans);
      background-color: var(--bg-primary);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(157, 78, 221, 0.15) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(255, 42, 133, 0.12) 0%, transparent 40%),
                  var(--bg-primary);
      min-height: 100vh;
      overflow-x: hidden;
    }

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

    /* 头部导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 6, 20, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 20px;
      font-weight: 700;
      letter-spacing: 1px;
    }
    .logo-box img {
      height: 38px;
      width: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 15px;
      padding: 8px 14px;
      transition: all 0.3s;
      display: inline-block;
    }
    .nav-links a:hover {
      color: var(--accent-pink);
      text-shadow: 0 0 8px rgba(255, 42, 133, 0.6);
    }
    .nav-action .btn-glow {
      padding: 8px 20px;
      border-radius: 20px;
      background: var(--gradient-btn);
      color: #fff;
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      box-shadow: 0 0 15px rgba(255, 42, 133, 0.4);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .nav-action .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 133, 0.7);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 6px 10px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 18px;
    }

    /* 通用板块 */
    section {
      padding: 70px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 45px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(255, 42, 133, 0.12);
      border: 1px solid rgba(255, 42, 133, 0.35);
      color: var(--accent-pink);
      font-size: 13px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      background: linear-gradient(180deg, #ffffff 0%, #d8c3e8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      max-width: 650px;
      margin: 0 auto;
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 30px;
      background: rgba(157, 78, 221, 0.15);
      border: 1px solid rgba(157, 78, 221, 0.4);
      color: var(--accent-cyan);
      font-size: 14px;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }
    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }
    .btn-main {
      background: var(--gradient-btn);
      color: #ffffff;
      padding: 14px 34px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: 700;
      font-size: 16px;
      box-shadow: 0 0 25px rgba(255, 42, 133, 0.5);
      transition: all 0.3s;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
    }
    .btn-main:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 0 35px rgba(255, 42, 133, 0.8);
    }
    .btn-sub {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 14px 30px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: 600;
      font-size: 16px;
      transition: all 0.3s;
      display: inline-flex;
      align-items: center;
    }
    .btn-sub:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    /* 数据指标卡片 (Hero区域内纯CSS) */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: 14px;
      backdrop-filter: blur(8px);
      transition: transform 0.3s, border-color 0.3s;
    }
    .stat-card:hover {
      transform: translateY(-5px);
      border-color: var(--accent-pink);
    }
    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 6px;
      text-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 模型矩阵徽章云 */
    .models-marquee {
      background: rgba(22, 11, 36, 0.6);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 24px 0;
      overflow: hidden;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
    }
    .model-tag {
      background: rgba(255, 42, 133, 0.08);
      border: 1px solid rgba(157, 78, 221, 0.3);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 13px;
      color: #e2d4f0;
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: var(--accent-pink);
      color: #fff;
      border-color: var(--accent-pink);
      box-shadow: 0 0 10px rgba(255, 42, 133, 0.5);
    }

    /* 服务与能力网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 26px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--gradient-brand);
      opacity: 0;
      transition: opacity 0.3s;
    }
    .feature-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-glow);
      transform: translateY(-6px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    }
    .feature-card:hover::before {
      opacity: 1;
    }
    .card-icon {
      font-size: 28px;
      color: var(--accent-pink);
      margin-bottom: 14px;
      display: inline-block;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 图片与媒体展示模块 */
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      transition: transform 0.3s;
    }
    .media-card:hover {
      transform: translateY(-5px);
      border-color: var(--accent-cyan);
    }
    .media-card .img-wrap {
      width: 100%;
      overflow: hidden;
      background: #11071c;
    }
    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover img {
      transform: scale(1.04);
    }
    .media-info {
      padding: 20px;
    }

    /* 标准流程时间线 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px;
      border-radius: 14px;
      position: relative;
      text-align: center;
    }
    .step-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--gradient-btn);
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px;
      box-shadow: 0 0 15px rgba(255, 42, 133, 0.4);
    }

    /* 对比评测表格与卡片 */
    .rating-highlight {
      background: linear-gradient(135deg, rgba(255, 42, 133, 0.15), rgba(157, 78, 221, 0.15));
      border: 1px solid var(--accent-pink);
      border-radius: 16px;
      padding: 28px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .big-score {
      font-size: 48px;
      font-weight: 900;
      color: var(--accent-cyan);
      text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
    }
    .score-stars {
      color: #ffb703;
      font-size: 20px;
    }
    .table-container {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: 16px;
      border: 1px solid var(--border-color);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(157, 78, 221, 0.15);
      font-size: 14px;
    }
    .comparison-table th {
      background: rgba(22, 11, 36, 0.9);
      color: #ffffff;
      font-weight: 700;
    }
    .comparison-table tr:hover td {
      background: rgba(255, 42, 133, 0.05);
    }
    .highlight-col {
      color: var(--accent-cyan);
      font-weight: 700;
    }

    /* 客户评论卡片 */
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s;
    }
    .review-card:hover {
      border-color: var(--accent-pink);
      transform: translateY(-4px);
    }
    .review-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 14px;
    }
    .review-author {
      font-weight: 700;
      color: #ffffff;
      font-size: 15px;
    }
    .review-role {
      font-size: 12px;
      color: var(--accent-cyan);
      background: rgba(0, 240, 255, 0.1);
      padding: 2px 8px;
      border-radius: 10px;
    }
    .review-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-item.active {
      border-color: var(--accent-pink);
    }
    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 15px;
      color: #ffffff;
      user-select: none;
    }
    .faq-icon {
      font-size: 18px;
      color: var(--accent-pink);
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
      padding: 0 22px;
    }
    .faq-item.active .faq-answer {
      padding: 0 22px 18px 22px;
    }

    /* 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 40px;
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .contact-icon {
      color: var(--accent-cyan);
      font-size: 20px;
      margin-top: 2px;
    }
    .qr-container {
      margin-top: 15px;
      display: inline-block;
      padding: 10px;
      background: #ffffff;
      border-radius: 10px;
      max-width: 140px;
    }
    .qr-container img {
      width: 100%;
      height: auto;
      display: block;
    }
    .form-box {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 13px;
      color: var(--text-muted);
    }
    .form-control {
      background: rgba(13, 6, 20, 0.8);
      border: 1px solid rgba(157, 78, 221, 0.3);
      padding: 12px 16px;
      border-radius: 8px;
      color: #ffffff;
      font-size: 14px;
      font-family: inherit;
      outline: none;
      transition: border-color 0.3s;
    }
    .form-control:focus {
      border-color: var(--accent-pink);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 资讯与友情链接 */
    .news-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .news-item a {
      display: flex;
      justify-content: space-between;
      color: var(--text-muted);
      text-decoration: none;
      padding: 12px 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      transition: all 0.2s;
    }
    .news-item a:hover {
      color: var(--accent-cyan);
      border-color: var(--accent-cyan);
      padding-left: 20px;
    }

    .footer {
      background: #09030d;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }
    .footer-col h4 {
      color: #ffffff;
      margin-bottom: 14px;
      font-size: 16px;
    }
    .links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .links-grid a {
      color: var(--text-muted);
      text-decoration: none;
      background: rgba(255, 255, 255, 0.04);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      transition: all 0.2s;
    }
    .links-grid a:hover {
      color: var(--accent-pink);
      background: rgba(255, 42, 133, 0.1);
    }
    .footer-bottom {
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 20px;
      font-size: 13px;
      color: #7d6b91;
    }

    /* 浮动工具栏 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      background: var(--bg-card-hover);
      border: 1px solid var(--accent-pink);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      text-decoration: none;
      cursor: pointer;
      box-shadow: 0 0 12px rgba(255, 42, 133, 0.4);
      transition: transform 0.2s, background-color 0.2s;
    }
    .float-btn:hover {
      transform: scale(1.1);
      background: var(--accent-pink);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .grid-3, .process-steps, .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        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: var(--bg-secondary);
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        padding: 10px 0;
        width: 100%;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-stats-grid, .grid-3, .grid-4, .grid-2, .process-steps {
        grid-template-columns: 1fr;
      }
      .rating-highlight {
        flex-direction: column;
        align-items: flex-start;
      }
    }