/* roulang page: index */
:root {
      --primary: #0F62FE;
      --primary-hover: #0043CE;
      --secondary: #10B981;
      --secondary-dark: #059669;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #090D16;
      --bg-dark-card: #131A29;
      --text-main: #0F172A;
      --text-body: #475569;
      --text-muted: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-full: 100px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(15, 98, 254, 0.15);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    *, *::before, *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    body {
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-body);
      background-color: var(--bg-light);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 0.75rem;
    }

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

    /* 顶部元数据栏 */
    .top-meta-bar {
      font-size: 13px;
      color: var(--text-muted);
      background: #F1F5F9;
      padding: 6px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .top-meta-bar a {
      color: var(--text-body);
    }
    .top-meta-bar a:hover {
      color: var(--primary);
    }

    /* 浮动双行导航 */
    .navbar-floating-wrap {
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 12px 0;
      transition: var(--transition);
    }
    .navbar-custom {
      width: calc(100% - 32px);
      max-width: 1280px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      padding: 10px 24px;
      transition: var(--transition);
    }
    .navbar-brand {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary) !important;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.01em;
    }
    .navbar-brand span {
      color: var(--text-main);
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body) !important;
      padding: 8px 14px !important;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: rgba(15, 98, 254, 0.06);
    }
    .btn-nav-action {
      background: var(--primary);
      color: #fff !important;
      font-size: 14px;
      font-weight: 600;
      padding: 8px 22px;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 12px rgba(15, 98, 254, 0.25);
    }
    .btn-nav-action:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }

    /* 按钮通用重塑 */
    .btn-theme-primary {
      background: var(--primary);
      color: #fff;
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--radius-full);
      border: 1px solid transparent;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-theme-primary:hover {
      background: var(--primary-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .btn-theme-secondary {
      background: var(--secondary);
      color: #fff;
      font-weight: 600;
      padding: 12px 30px;
      border-radius: var(--radius-full);
      border: 1px solid transparent;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-theme-secondary:hover {
      background: var(--secondary-dark);
      color: #fff;
      transform: translateY(-2px);
    }
    .btn-theme-outline {
      background: transparent;
      color: var(--text-main);
      font-weight: 600;
      padding: 12px 30px;
      border-radius: var(--radius-full);
      border: 1px solid var(--border-color);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-theme-outline:hover {
      background: #F1F5F9;
      color: var(--primary);
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 通用板块与排版 */
    .section-padding {
      padding: 90px 0;
    }
    .section-title-wrap {
      margin-bottom: 48px;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(15, 98, 254, 0.08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }
    .section-badge-green {
      background: rgba(16, 185, 129, 0.12);
      color: var(--secondary-dark);
    }
    .section-subtitle {
      max-width: 760px;
      font-size: 17px;
      color: var(--text-body);
      line-height: 1.8;
      margin: 0 auto;
    }

    /* 卡片重塑 */
    .custom-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      overflow: hidden;
      height: 100%;
    }
    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(15, 98, 254, 0.25);
    }

    /* 首屏 Hero 新品发布版式 */
    .hero-section {
      position: relative;
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(9, 13, 22, 0.94)), url('/assets/images/5545b3de0ee28eaa.jpg');
      background-size: cover;
      background-position: center;
      color: #fff;
      padding: 100px 0 120px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      color: #ffffff;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .hero-desc {
      font-size: 1.15rem;
      line-height: 1.8;
      color: #CBD5E1;
      margin-bottom: 32px;
      max-width: 680px;
    }
    .hero-countdown-box {
      background: rgba(255, 255, 255, 0.06);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 30px;
    }
    .countdown-timer-ring {
      display: flex;
      gap: 16px;
      justify-content: center;
      margin-bottom: 24px;
    }
    .timer-ring-unit {
      background: rgba(15, 98, 254, 0.2);
      border: 1px solid rgba(15, 98, 254, 0.4);
      width: 72px;
      height: 72px;
      border-radius: 50%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .timer-ring-unit .val {
      font-size: 22px;
      font-weight: 700;
      color: #ffffff;
      line-height: 1;
    }
    .timer-ring-unit .lbl {
      font-size: 11px;
      color: #94A3B8;
      margin-top: 4px;
    }

    /* KPI 看板 */
    .kpi-section {
      margin-top: -50px;
      position: relative;
      z-index: 10;
    }
    .kpi-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.06);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .kpi-icon-wrap {
      width: 58px;
      height: 58px;
      border-radius: 14px;
      background: rgba(15, 98, 254, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      flex-shrink: 0;
    }
    .kpi-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.1;
    }
    .kpi-title {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
      font-weight: 500;
    }

    /* 深色案例与全景区 */
    .dark-showcase-section {
      background: var(--bg-dark);
      color: #fff;
    }
    .dark-showcase-section h2, .dark-showcase-section h3 {
      color: #fff;
    }
    .dark-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 30px;
      height: 100%;
    }
    .dark-card:hover {
      border-color: rgba(15, 98, 254, 0.4);
    }

    /* 结果对比表格/卡片 */
    .diff-table-wrap {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .diff-header-col-bad {
      background: #F8FAFC;
      color: var(--text-body);
      font-weight: 600;
    }
    .diff-header-col-good {
      background: rgba(16, 185, 129, 0.08);
      color: var(--secondary-dark);
      font-weight: 700;
    }

    /* 里程碑 / 时间线 */
    .milestone-box {
      border-left: 2px dashed #CBD5E1;
      padding-left: 28px;
      position: relative;
      margin-bottom: 30px;
    }
    .milestone-dot {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      position: absolute;
      left: -8px;
      top: 6px;
      box-shadow: 0 0 0 4px rgba(15, 98, 254, 0.2);
    }

    /* 常见问题手风琴重塑 */
    .accordion-item {
      border: 1px solid var(--border-color);
      margin-bottom: 12px;
      border-radius: 12px !important;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 600;
      color: var(--text-main);
      padding: 20px 24px;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      background-color: #F0FDF4;
      color: var(--secondary-dark);
    }
    .accordion-button:after {
      background-size: 1rem;
    }

    /* 平台保障条 */
    .assurance-item {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: flex-start;
      gap: 16px;
      box-shadow: var(--shadow-sm);
    }
    .assurance-icon {
      font-size: 26px;
      color: var(--secondary);
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 页脚 */
    .footer-dark {
      background: #060910;
      color: #94A3B8;
      padding: 80px 0 30px;
      border-top: 1px solid var(--border-dark);
      font-size: 14px;
    }
    .footer-dark h5 {
      color: #F8FAFC;
      font-size: 16px;
      margin-bottom: 20px;
    }
    .footer-dark ul {
      padding-left: 0;
      list-style: none;
    }
    .footer-dark ul li {
      margin-bottom: 10px;
    }
    .footer-dark ul a:hover {
      color: #fff;
    }
    .footer-bottom-bar {
      border-top: 1px solid var(--border-dark);
      margin-top: 50px;
      padding-top: 25px;
      font-size: 13px;
      color: #64748B;
    }

    /* 响应式调整 */
    @media (max-width: 991px) {
      .hero-h1 {
        font-size: 2.2rem;
      }
      .kpi-section {
        margin-top: 20px;
      }
    }
    @media (max-width: 768px) {
      .navbar-custom {
        width: 100%;
        border-radius: 0;
        margin: 0;
        padding: 10px 16px;
      }
      .navbar-floating-wrap {
        padding: 0;
      }
      .hero-h1 {
        font-size: 1.85rem;
      }
      .hero-countdown-box {
        margin-top: 36px;
      }
      .section-padding {
        padding: 60px 0;
      }
    }