/* roulang page: index */
:root {
      --bg-dark: #0A192F;
      --bg-deep: #050d1a;
      --bg-light: #F4F7FB;
      --bg-card: #FFFFFF;
      --text-main: #1A2737;
      --text-muted: #5A6D82;
      --text-light: #E2E8F0;
      --primary-cyan: #00F2FE;
      --primary-blue: #0E73F6;
      --accent-orange: #FF5722;
      --accent-hover: #E64A19;
      --border-color: #E2E8F0;
      --border-dark: #1E3354;
      --shadow-sm: 0 4px 12px rgba(10, 25, 47, 0.06);
      --shadow-lg: 0 16px 36px rgba(10, 25, 47, 0.12);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: #06101E;
      color: #8C9FB5;
      font-size: 0.85rem;
      border-bottom: 1px solid var(--border-dark);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left span {
      margin-right: 20px;
    }
    .top-bar-right a {
      color: #8C9FB5;
      margin-left: 16px;
    }
    .top-bar-right a:hover {
      color: var(--primary-cyan);
    }

    .main-nav-wrapper {
      background: rgba(10, 25, 47, 0.96);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-dark);
    }
    .main-nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 700;
      color: #FFFFFF;
      letter-spacing: 0.5px;
    }
    .brand-logo .logo-badge {
      background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
      color: var(--bg-dark);
      font-weight: 900;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.95rem;
      letter-spacing: 1px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-item a {
      color: var(--text-light);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-item a:hover,
    .nav-item a.active {
      color: var(--primary-cyan);
    }
    .nav-cta {
      background: var(--accent-orange);
      color: #FFFFFF !important;
      padding: 9px 20px !important;
      border-radius: 4px;
      font-weight: 600;
    }
    .nav-cta:hover {
      background: var(--accent-hover) !important;
      box-shadow: 0 4px 15px rgba(255, 87, 34, 0.4);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 30px;
      border-radius: 4px;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s ease;
    }
    .btn-primary {
      background: var(--accent-orange);
      color: #FFFFFF;
      box-shadow: 0 6px 20px rgba(255, 87, 34, 0.3);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 87, 34, 0.45);
    }
    .btn-secondary {
      background: transparent;
      color: #FFFFFF;
      border-color: var(--primary-cyan);
    }
    .btn-secondary:hover {
      background: rgba(0, 242, 254, 0.12);
      color: var(--primary-cyan);
      transform: translateY(-2px);
    }

    /* 板块通用 */
    .section-padding {
      padding: 85px 0;
    }
    .section-title-wrap {
      margin-bottom: 50px;
      max-width: 800px;
    }
    .section-subtitle {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-blue);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 10px;
      display: inline-block;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.3;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.7;
    }

    /* 板块 2：全宽矮横幅 Hero */
    .hero-strip {
      background: linear-gradient(135deg, rgba(10, 25, 47, 0.94), rgba(5, 13, 26, 0.98)), url('/assets/images/智_汇_十五运_从云端到场馆_天河科技力量全方位护航.png') center/cover no-repeat;
      color: #FFFFFF;
      padding: 65px 0 60px;
      border-bottom: 1px solid var(--border-dark);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 2.45rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 18px;
      background: linear-gradient(90deg, #FFFFFF, var(--primary-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.35);
      color: var(--primary-cyan);
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .hero-lead {
      color: #B0C4DE;
      font-size: 1.05rem;
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .hero-preview {
      position: relative;
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid rgba(0, 242, 254, 0.3);
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.45);
    }
    .hero-preview img {
      width: 100%;
      height: 290px;
      object-fit: cover;
    }
    .hero-status-tag {
      position: absolute;
      bottom: 12px;
      left: 12px;
      background: rgba(10, 25, 47, 0.85);
      backdrop-filter: blur(4px);
      border: 1px solid var(--border-dark);
      padding: 6px 14px;
      border-radius: 4px;
      color: var(--primary-cyan);
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 板块 3：品牌核心调度介绍 */
    .brand-intro-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .intro-visual {
      border-radius: 6px;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .intro-visual img {
      width: 100%;
      height: 360px;
      object-fit: cover;
    }
    .intro-bullets {
      list-style: none;
      margin-top: 24px;
      display: grid;
      gap: 16px;
    }
    .intro-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .intro-dot {
      width: 10px;
      height: 10px;
      background: var(--primary-blue);
      border-radius: 50%;
      margin-top: 8px;
      flex-shrink: 0;
    }
    .intro-item h4 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .intro-item p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 4：核心优势区 (6 卡片) */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .adv-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(10, 25, 47, 0.1);
      border-color: var(--primary-blue);
    }
    .adv-num {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary-blue);
      margin-bottom: 12px;
      opacity: 0.85;
    }
    .adv-card h3 {
      font-size: 1.2rem;
      color: var(--text-main);
      margin-bottom: 12px;
      font-weight: 700;
    }
    .adv-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 5：热门产品区 (3 卡片) */
    .products-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      background: var(--bg-light);
      border-radius: 6px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .product-card-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .product-body {
      padding: 26px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .product-badge {
      display: inline-block;
      align-self: flex-start;
      background: rgba(14, 115, 246, 0.1);
      color: var(--primary-blue);
      font-size: 0.78rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 3px;
      margin-bottom: 14px;
    }
    .product-body h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .product-body p {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .product-features {
      list-style: none;
      border-top: 1px solid #DFE6EF;
      padding-top: 16px;
      margin-bottom: 20px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .product-features li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-features li::before {
      content: "✓";
      color: #10B981;
      font-weight: bold;
    }

    /* 板块 6：深色理念区 */
    .philosophy-section {
      background: linear-gradient(180deg, #0A192F 0%, #050D1A 100%);
      color: #FFFFFF;
      position: relative;
    }
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .philo-content h2 {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .philo-content p {
      color: #94A3B8;
      font-size: 1.02rem;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .philo-card-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .philo-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      padding: 20px;
      border-radius: 4px;
    }
    .philo-item h4 {
      color: var(--primary-cyan);
      font-size: 1.05rem;
      margin-bottom: 8px;
    }
    .philo-item p {
      color: #8C9FB5;
      font-size: 0.88rem;
      margin-bottom: 0;
      line-height: 1.5;
    }

    /* 板块 7：用户痛点到解决方案 */
    .user-story-section {
      background: #FFFFFF;
    }
    .story-card-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .story-left {
      background: var(--bg-light);
      padding: 36px;
      border-radius: 6px;
      border-left: 4px solid var(--accent-orange);
    }
    .story-left h3 {
      font-size: 1.3rem;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .story-left p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .story-right img {
      width: 100%;
      height: 330px;
      object-fit: cover;
      border-radius: 6px;
      box-shadow: var(--shadow-sm);
    }

    /* 板块 8：关键数据指标 */
    .metrics-bar-section {
      background: #0A192F;
      color: #FFFFFF;
      padding: 55px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 10px;
    }
    .metric-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary-cyan);
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: monospace, sans-serif;
    }
    .metric-label {
      font-size: 0.95rem;
      color: #A0AEC0;
      font-weight: 500;
    }

    /* 板块 9：用户评价区 */
    .testimonials-section {
      background: var(--bg-light);
    }
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .testi-card {
      background: #FFFFFF;
      padding: 30px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #EDF2F7;
      padding-top: 14px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #CBD5E1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #334155;
    }
    .author-info h4 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .author-info span {
      font-size: 0.8rem;
      color: #8C9FB5;
    }

    /* 板块 10：资讯与动态 */
    .news-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: 4px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }
    .news-card:hover {
      box-shadow: var(--shadow-sm);
      border-color: var(--primary-blue);
    }
    .news-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .news-content {
      padding: 22px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8rem;
      color: #8C9FB5;
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      line-height: 1.4;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .news-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 板块 11：FAQ 手风琴 */
    .faq-section {
      background: var(--bg-light);
    }
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: grid;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      padding: 24px 28px;
    }
    .faq-item h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 10px;
      font-weight: 700;
    }
    .faq-item p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 12：底部强转化 CTA */
    .cta-banner-section {
      background: linear-gradient(135deg, #0A192F 0%, #031224 100%);
      color: #FFFFFF;
      text-align: center;
      padding: 70px 0;
      border-top: 1px solid var(--border-dark);
    }
    .cta-box {
      max-width: 760px;
      margin: 0 auto;
    }
    .cta-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .cta-desc {
      font-size: 1.05rem;
      color: #B0C4DE;
      margin-bottom: 32px;
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background: #050D1A;
      color: #8C9FB5;
      padding: 60px 0 30px;
      border-top: 1px solid var(--border-dark);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 45px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: grid;
      gap: 10px;
    }
    .footer-links a {
      color: #8C9FB5;
    }
    .footer-links a:hover {
      color: var(--primary-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 25px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: #64748B;
    }

    /* 移动端汉堡切换及响应式 */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--border-dark);
      color: #FFFFFF;
      padding: 8px 12px;
      border-radius: 4px;
      font-size: 1rem;
      cursor: pointer;
    }

    @media (max-width: 1024px) {
      .hero-grid,
      .intro-grid,
      .philosophy-grid,
      .story-card-wrapper {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .advantage-grid,
      .product-grid,
      .testi-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #0A192F;
        flex-direction: column;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-dark);
        gap: 16px;
      }
      .nav-menu.open {
        display: flex;
      }
      .advantage-grid,
      .product-grid,
      .testi-grid,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr 1fr;
      }
      .section-padding {
        padding: 55px 0;
      }
      .hero-h1 {
        font-size: 1.85rem;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }

    @media (max-width: 375px) {
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
    }