/* roulang page: index */
:root {
      --bs-primary: #00C2FF;
      --bs-dark: #0A0E27;
      --bs-body-bg: #0A0E27;
      --bs-body-color: #FFFFFF;
      --accent-orange: #FF6B35;
      --success-green: #00E676;
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-border: rgba(255, 255, 255, 0.08);
      --glass-hover-border: rgba(0, 194, 255, 0.3);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      --glow-blue: 0 0 24px rgba(0, 194, 255, 0.15);
      --btn-glow: 0 0 20px rgba(0, 194, 255, 0.5);
      --btn-glow-hover: 0 0 32px rgba(0, 194, 255, 0.8);
      --text-muted: rgba(255, 255, 255, 0.6);
      --section-gap: 5rem;
      --border-radius-lg: 20px;
      --border-radius-btn: 12px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'MiSans', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background: linear-gradient(135deg, #0A0E27 0%, #141832 100%);
      color: #FFFFFF;
      margin: 0;
      line-height: 1.7;
      font-size: 16px;
      font-weight: 400;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.3px;
    }

    h1 {
      font-size: 48px;
      letter-spacing: -0.5px;
      text-shadow: 0 0 40px rgba(0, 194, 255, 0.3);
    }

    h2 {
      font-size: 36px;
      margin-bottom: 1.5rem;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
    }

    .text-muted-custom {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.5;
    }

    a {
      color: var(--bs-primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover {
      color: #33D0FF;
    }

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

    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-lg);
      box-shadow: var(--card-shadow);
      transition: border 0.3s, box-shadow 0.3s, transform 0.2s;
    }

    .glass-card:hover {
      border-color: var(--glass-hover-border);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 24px rgba(0, 194, 255, 0.2);
      transform: translateY(-4px);
    }

    /* 按钮系统 */
    .btn-primary-glow {
      background: #00C2FF;
      color: #0A0E27;
      font-weight: 600;
      border: none;
      border-radius: var(--border-radius-btn);
      padding: 12px 28px;
      box-shadow: var(--btn-glow);
      transition: all 0.3s ease;
      letter-spacing: 0.3px;
    }

    .btn-primary-glow:hover {
      background: #33D0FF;
      box-shadow: var(--btn-glow-hover);
      color: #0A0E27;
      transform: scale(1.02);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      font-weight: 500;
      border-radius: var(--border-radius-btn);
      padding: 12px 28px;
      transition: all 0.3s;
    }

    .btn-ghost:hover {
      border-color: #00C2FF;
      color: #00C2FF;
      background: rgba(0, 194, 255, 0.05);
    }

    /* 导航 */
    .navbar {
      background: rgba(255, 255, 255, 0.97);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.06);
      padding: 0.8rem 0;
    }

    .navbar-brand {
      font-size: 20px;
      font-weight: 700;
      color: #0A0E27 !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .navbar-brand i {
      color: #00C2FF;
      font-size: 24px;
    }

    .nav-link {
      color: #333 !important;
      font-weight: 500;
      font-size: 15px;
      margin: 0 0.5rem;
      transition: color 0.2s;
    }

    .nav-link:hover, .nav-link.active {
      color: #00C2FF !important;
    }

    .search-box {
      background: #F5F5F5;
      border-radius: 20px;
      padding: 6px 16px;
      display: flex;
      align-items: center;
      color: #666;
    }

    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      margin-left: 6px;
      font-size: 14px;
      width: 100px;
    }

    .navbar .btn-primary-glow {
      padding: 8px 20px;
      font-size: 14px;
      box-shadow: 0 0 12px rgba(0, 194, 255, 0.4);
    }

    .offcanvas {
      background: rgba(10, 14, 39, 0.98);
      backdrop-filter: blur(25px);
      color: white;
    }

    .offcanvas .nav-link {
      color: rgba(255,255,255,0.8) !important;
    }

    /* Hero */
    #hero {
      min-height: 90vh;
      background: radial-gradient(circle at 30% 40%, #1a1f40 0%, #0A0E27 70%);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }

    .hero-bg-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.2;
      z-index: 0;
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .data-highlight {
      font-size: 28px;
      font-weight: 700;
      color: #00C2FF;
    }

    .hero-dashboard {
      filter: drop-shadow(0 0 30px rgba(0,194,255,0.4));
    }

    /* 区块标题 */
    .section-title {
      margin-bottom: 3rem;
    }

    /* 功能卡片网格 */
    .feature-icon {
      font-size: 36px;
      color: #00C2FF;
      margin-bottom: 1.2rem;
    }

    /* 场景交替布局 */
    .scenario-img {
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,0.08);
      transition: all 0.3s;
    }

    .tag-badge {
      background: rgba(0,194,255,0.1);
      color: #00C2FF;
      border-radius: 20px;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 500;
    }

    /* 案例卡片 */
    .case-logo {
      width: 56px;
      height: 56px;
      background: rgba(255,255,255,0.06);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1rem;
      overflow: hidden;
    }

    .case-stat {
      font-size: 32px;
      font-weight: 700;
      color: #00C2FF;
    }

    /* 价格卡片高亮 */
    .pricing-card.popular {
      border-color: #00C2FF;
      box-shadow: 0 0 30px rgba(0,194,255,0.3);
      position: relative;
    }

    .popular-badge {
      background: #FF6B35;
      color: white;
      border-radius: 20px;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 600;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
    }

    .check-icon {
      color: #00E676;
      margin-right: 8px;
    }

    /* FAQ 手风琴 */
    .accordion-button {
      background: transparent;
      color: white;
      font-weight: 500;
      font-size: 18px;
      box-shadow: none;
      border: none;
      padding: 1.2rem 1.5rem;
    }

    .accordion-item {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-lg) !important;
      margin-bottom: 1rem;
      overflow: hidden;
    }

    .accordion-button:not(.collapsed) {
      background: rgba(0,194,255,0.08);
      color: #00C2FF;
    }

    .accordion-button::after {
      filter: brightness(0) invert(1);
    }

    /* 最终CTA */
    #cta {
      background: #0A0E27;
      background-image: radial-gradient(circle at 20% 50%, #1a2040 0%, #0A0E27 80%);
    }

    /* 页脚 */
    footer {
      background: #080C1F;
    }

    footer a {
      color: rgba(255,255,255,0.7);
      font-size: 14px;
    }

    footer a:hover {
      color: #00C2FF;
    }

    @media (max-width: 992px) {
      h1 { font-size: 40px; }
      .navbar .search-box { display: none; }
    }

    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      #hero { min-height: 70vh; text-align: center; }
      .scenario-row { flex-direction: column; }
      .glass-card { backdrop-filter: blur(10px); }
      footer .col-md-3 { margin-bottom: 2rem; }
    }