/* roulang page: index */
:root {
      --primary: #6366F1;
      --primary-hover: #4F46E5;
      --secondary: #06B6D4;
      --accent: #F59E0B;
      --accent-hover: #D97706;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(99, 102, 241, 0.15);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-md);
    }

    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部微通栏 */
    .top-bar {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 0.825rem;
      border-bottom: 1px solid var(--border-dark);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #34D399;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: #34D399;
      border-radius: 50%;
      box-shadow: 0 0 8px #34D399;
    }

    /* 主导航 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .brand-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 1.1rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #4338CA);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    }
    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
      transform: translateY(-1px);
    }
    .btn-accent {
      background: linear-gradient(135deg, var(--accent), #D97706);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    }
    .btn-accent:hover {
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: var(--border-color);
      background: #FFFFFF;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 板块通用 */
    .section-wrap {
      padding: 85px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 55px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(99, 102, 241, 0.08);
      color: var(--primary);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 12px;
      border: 1px solid rgba(99, 102, 241, 0.2);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero 区域 (闪购与主推卡片) */
    .hero-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 50px 0 80px;
      position: relative;
    }
    .flash-sale-bar {
      background: linear-gradient(90deg, #1E1B4B, #312E81);
      border-radius: var(--radius-md);
      padding: 14px 28px;
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .countdown-timer {
      display: inline-flex;
      gap: 8px;
      align-items: center;
      font-weight: 700;
    }
    .time-badge {
      background: #EF4444;
      padding: 2px 8px;
      border-radius: 4px;
      font-family: monospace;
      font-size: 1.05rem;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.18;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-content p {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
      line-height: 1.75;
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      margin-bottom: 35px;
    }
    .hero-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .hero-card-img-wrap {
      position: relative;
      margin-bottom: 16px;
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .floating-spec-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(15, 23, 42, 0.85);
      color: #38BDF8;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 700;
      backdrop-filter: blur(4px);
    }

    /* 2. 品类入口 (分类导航) */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .category-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 26px 20px;
      border: 1px solid var(--border-color);
      text-align: center;
      transition: var(--transition);
      display: block;
    }
    .category-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .category-icon {
      width: 52px;
      height: 52px;
      margin: 0 auto 16px;
      background: #EEF2FF;
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
    }
    .category-card h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }
    .category-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 附近推荐 (机房算力与本地部署实例) */
    .nearby-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .nearby-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }
    .nearby-card:hover {
      box-shadow: var(--shadow-md);
    }
    .nearby-card-body {
      padding: 20px;
    }
    .nearby-meta {
      display: flex;
      justify-content: space-between;
      color: var(--text-light);
      font-size: 0.85rem;
      margin-bottom: 10px;
    }
    .nearby-card h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }
    .nearby-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 4. 口碑榜 (高分方案) */
    .ranking-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .ranking-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .rank-num {
      position: absolute;
      top: -12px;
      left: 20px;
      background: var(--accent);
      color: #fff;
      font-weight: 800;
      font-size: 0.85rem;
      padding: 2px 10px;
      border-radius: 20px;
    }
    .ranking-card h3 {
      margin-top: 8px;
      font-size: 1.2rem;
      margin-bottom: 10px;
    }
    .ranking-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 5. 核心优势矩阵 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .advantage-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 30px 24px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .advantage-card:hover {
      border-color: var(--secondary);
      transform: translateY(-4px);
    }
    .advantage-card h3 {
      font-size: 1.2rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .advantage-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 6. 深色沉浸式算力与引擎架构 */
    .dark-engine-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }
    .dark-engine-section .section-title {
      color: #FFFFFF;
    }
    .dark-engine-section .section-desc {
      color: #94A3B8;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .dark-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
      margin-bottom: 20px;
    }
    .dark-card h3 {
      font-size: 1.2rem;
      color: #38BDF8;
      margin-bottom: 10px;
    }
    .dark-card p {
      font-size: 0.92rem;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 7. 保障承诺条 (SLA与安全合规) */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 24px 20px;
      border-left: 4px solid var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .guarantee-box h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .guarantee-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 8. 到店/生产流程步骤 */
    .pipeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .pipeline-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      position: relative;
    }
    .step-index {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }
    .pipeline-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }
    .pipeline-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 9. 真实客户评测与行业原声 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      background: #E0E7FF;
      color: var(--primary);
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .author-info h4 {
      font-size: 0.95rem;
      margin-bottom: 2px;
    }
    .author-info span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 10. 效能数据统计条 */
    .stats-bar {
      background: linear-gradient(135deg, #1E1B4B 0%, #0F172A 100%);
      color: #FFFFFF;
      padding: 50px 0;
      border-radius: var(--radius-lg);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: #38BDF8;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 0.95rem;
      color: #CBD5E1;
    }

    /* 11. 行业动态与技术资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-body {
      padding: 22px;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 8px;
      display: block;
    }
    .news-body h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 12. 合作伙伴生态墙 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
    }
    .partner-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px 10px;
      text-align: center;
      font-weight: 700;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 13. 最终行动区与预约入口 */
    .cta-container {
      background: linear-gradient(135deg, #4338CA 0%, #1E1B4B 100%);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      color: #FFFFFF;
      text-align: center;
    }
    .cta-container h2 {
      font-size: 2.3rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-container p {
      font-size: 1.1rem;
      color: #E2E8F0;
      max-width: 720px;
      margin: 0 auto 35px;
    }
    .cta-form-row {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 580px;
      margin: 0 auto;
    }
    .cta-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      font-size: 1rem;
      outline: none;
    }
    .cta-input::placeholder {
      color: #94A3B8;
    }
    .cta-input:focus {
      border-color: #38BDF8;
      background: rgba(255, 255, 255, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background-color: #0B1120;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid var(--border-dark);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding-top: 25px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 0.85rem;
    }

    /* 移动端汉堡与响应式 */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    @media (max-width: 1024px) {
      .hero-grid, .dark-grid {
        grid-template-columns: 1fr;
      }
      .category-grid, .guarantee-grid, .pipeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .ranking-grid, .advantage-grid, .nearby-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-content h1 {
        font-size: 2.2rem;
      }
      .ranking-grid, .advantage-grid, .nearby-grid, .news-grid, .testimonial-grid, .category-grid, .guarantee-grid, .pipeline-steps {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .partner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-form-row {
        flex-direction: column;
      }
    }