/* 宝蓝明艳风 核心样式规范 */
    :root {
      --primary-color: #1d4ed8;       /* 明艳宝蓝 */
      --primary-hover: #1e40af;       /* 深宝蓝 */
      --primary-light: #eff6ff;       /* 浅蓝背景 */
      --primary-gradient: linear-gradient(135deg, #1d4ed8 0%, #3b82f6 100%);
      --accent-color: #2563eb;
      --text-dark: #0f172a;           /* 深正文色 */
      --text-muted: #475569;          /* 次级正文 */
      --bg-main: #f8fafc;             /* 主体背景 */
      --card-bg: #ffffff;             /* 卡片背景 */
      --border-color: #e2e8f0;       /* 边框色 */
      --shadow-sm: 0 2px 4px rgba(29, 78, 216, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(29, 78, 216, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --max-width: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: color 0.2s ease, opacity 0.2s ease;
    }

    a:hover {
      color: var(--primary-hover);
    }

    /* 顶部公告条 */
    .top-bar {
      background: #0f172a;
      color: #94a3b8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .top-bar-inner {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .top-bar-info {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .top-bar-info span {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    /* 主导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 12px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

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

    .brand-logo-wrap img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }

    /* CSS 强制要求：.nav-links gap: 0 */
    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
      list-style: none;
    }

    .nav-links li a {
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: #334155;
      display: inline-block;
      border-radius: var(--radius-sm);
      transition: all 0.2s;
    }

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

    .nav-cta-btn {
      background: var(--primary-gradient);
      color: #ffffff !important;
      padding: 10px 22px !important;
      border-radius: 50px;
      font-weight: 600 !important;
      box-shadow: 0 4px 12px rgba(29, 78, 216, 0.3);
      transition: transform 0.2s, box-shadow 0.2s !important;
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(29, 78, 216, 0.4);
      background: var(--primary-hover) !important;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* 统一定宽容器 */
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-padding {
      padding: 70px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      font-size: 13px;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto;
    }

    /* 首屏 HERO 区域 - 严格无任何图片 */
    .hero-section {
      background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
      padding: 80px 0 60px 0;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-bg-accent {
      position: absolute;
      top: -10%;
      right: -5%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(29, 78, 216, 0.08);
      border: 1px solid rgba(29, 78, 216, 0.2);
      border-radius: 50px;
      color: var(--primary-color);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    /* H1 控制在20字以内 */
    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      background: var(--primary-gradient);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-md);
      box-shadow: 0 8px 20px rgba(29, 78, 216, 0.3);
      transition: all 0.25s ease;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(29, 78, 216, 0.4);
      color: #ffffff;
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      background: #ffffff;
      color: var(--primary-color);
      border: 1px solid rgba(29, 78, 216, 0.3);
      font-size: 16px;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      cursor: pointer;
    }

    .btn-secondary:hover {
      background: var(--primary-light);
      border-color: var(--primary-color);
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .metric-item {
      text-align: center;
      padding: 10px;
      border-right: 1px solid var(--border-color);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-num {
      font-size: 30px;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1.2;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 模型支持跑马灯/展示条 */
    .models-bar-section {
      background: #ffffff;
      padding: 30px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .models-title {
      text-align: center;
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--text-muted);
      margin-bottom: 16px;
      font-weight: 700;
    }

    .models-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-tag {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 50px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background: var(--primary-light);
    }

    /* 通用卡片样式 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(29, 78, 216, 0.3);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 对比评测表格板块 */
    .compare-section {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .rating-banner {
      background: linear-gradient(90deg, #1d4ed8 0%, #1e40af 100%);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 15px;
    }

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

    .score-num {
      font-size: 42px;
      font-weight: 900;
      color: #facc15;
    }

    .stars-tag {
      font-size: 18px;
      font-weight: 700;
      background: rgba(255, 255, 255, 0.2);
      padding: 4px 12px;
      border-radius: 50px;
    }

    .compare-table-wrapper {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background-color: var(--bg-main);
      font-weight: 700;
      color: var(--text-dark);
    }

    .compare-table tr:hover {
      background-color: rgba(239, 246, 255, 0.4);
    }

    .highlight-col {
      background-color: rgba(239, 246, 255, 0.6);
      font-weight: 700;
      color: var(--primary-color);
    }

    /* 智能需求匹配与 Token 比价 */
    .quiz-box {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .token-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
    }

    .token-price {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary-color);
      margin: 10px 0;
    }

    /* 流程与服务网络 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 15px;
      position: relative;
    }

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

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-color);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px auto;
    }

    /* 案例中心展示图 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #f1f5f9;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-content {
      padding: 20px;
    }

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

    .review-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    /* FAQ折叠面板 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question:hover {
      color: var(--primary-color);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
      background: #fafafa;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 20px 24px;
      border-top: 1px solid var(--border-color);
    }

    /* 联系表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
    }

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

    /* 友情链接与文章 */
    .links-box {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links a {
      background: var(--bg-main);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: var(--text-muted);
      border: 1px solid var(--border-color);
    }

    .friend-links a:hover {
      color: var(--primary-color);
      border-color: var(--primary-color);
    }

    /* 底部Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 20px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      font-size: 14px;
    }

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

    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
    }

    /* 浮动客服入口 */
    .float-kefu {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      background: var(--primary-gradient);
      color: #ffffff;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(29, 78, 216, 0.4);
      cursor: pointer;
      transition: transform 0.3s ease;
    }

    .float-kefu:hover {
      transform: scale(1.1);
    }

    .kefu-popover {
      display: none;
      position: absolute;
      bottom: 70px;
      right: 0;
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 16px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 200px;
      text-align: center;
      color: var(--text-dark);
    }

    .kefu-popover img {
      width: 140px;
      height: 140px;
      border-radius: var(--radius-sm);
      margin-bottom: 8px;
    }

    .float-kefu:hover .kefu-popover {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .cards-grid-3, .cards-grid-4, .review-grid, .case-grid, .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        background: #ffffff;
        position: absolute;
        top: 100%;
        left: 0;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-h1 {
        font-size: 28px;
      }
      .cards-grid-3, .cards-grid-4, .review-grid, .case-grid, .token-grid, .steps-wrapper {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 15px;
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }