/* roulang page: index */
:root {
      --primary: #00E5FF;
      --primary-glow: rgba(0, 229, 255, 0.5);
      --secondary: #1A1A2E;
      --midnight: #16213E;
      --accent: #FF2E63;
      --text-main: #E0E0E0;
      --text-white: #FFFFFF;
      --text-muted: #B0B0B0;
      --card-bg: rgba(22, 33, 62, 0.6);
      --card-border: rgba(0, 229, 255, 0.15);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 12px 40px rgba(0, 229, 255, 0.25);
      --radius-lg: 16px;
      --radius-pill: 50px;
      --transition: 0.25s ease;
      --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background: radial-gradient(circle at 30% 10%, #1f1f3a, #0F0F1A 80%);
      color: var(--text-main);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      position: relative;
    }
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(rgba(0, 229, 255, 0.08) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: 0;
    }
    h1, h2, h3, .h1, .h2, .h3 {
      color: var(--text-white);
      font-weight: 600;
    }
    h1 {
      font-size: 2.75rem;
      letter-spacing: -0.5px;
      font-weight: 700;
    }
    h2 {
      font-size: 2rem;
      margin-bottom: 1.5rem;
      font-weight: 600;
    }
    h3 {
      font-size: 1.25rem;
      font-weight: 500;
    }
    .text-muted-custom {
      color: var(--text-muted);
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 5%;
    }
    @media (max-width: 768px) {
      .container-custom {
        padding: 0 16px;
      }
      h1 {
        font-size: 2rem;
      }
      h2 {
        font-size: 1.75rem;
      }
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(26, 26, 46, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.2);
      position: sticky;
      top: 0;
      z-index: 1000;
      padding: 0.8rem 0;
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--text-white) !important;
      position: relative;
    }
    .navbar-brand span {
      background: linear-gradient(180deg, #fff 0%, #00E5FF 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .navbar-brand::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 50%;
      height: 3px;
      background: var(--primary);
      box-shadow: 0 0 12px var(--primary);
      border-radius: 4px;
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      margin: 0 0.4rem;
      transition: var(--transition);
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 12px var(--primary);
    }
    .navbar-toggler {
      border: 1px solid var(--primary);
      color: var(--primary);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 229, 255, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    .mobile-bottom-nav {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 10, 20, 0.9);
      backdrop-filter: blur(20px);
      border-top: 1px solid rgba(0, 229, 255, 0.3);
      display: none;
      justify-content: space-around;
      padding: 10px 0;
      z-index: 1050;
    }
    .mobile-bottom-nav a {
      color: var(--text-muted);
      text-align: center;
      font-size: 0.8rem;
      transition: var(--transition);
    }
    .mobile-bottom-nav a i {
      font-size: 1.5rem;
      display: block;
    }
    .mobile-bottom-nav a.active {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    @media (max-width: 992px) {
      .mobile-bottom-nav {
        display: flex;
      }
      .navbar-custom .navbar-collapse {
        background: rgba(26, 26, 46, 0.95);
        backdrop-filter: blur(20px);
        padding: 1rem;
      }
    }

    /* 按钮 */
    .btn-primary-glow {
      background: var(--primary);
      border: none;
      color: #1A1A2E;
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.75rem 2rem;
      box-shadow: 0 0 20px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-primary-glow:hover {
      background: #33EAFF;
      box-shadow: 0 0 30px var(--primary);
      transform: scale(1.03);
      color: #0a0a14;
    }
    .btn-outline-glow {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.75rem 2rem;
      transition: var(--transition);
    }
    .btn-outline-glow:hover {
      background: rgba(0, 229, 255, 0.15);
      box-shadow: 0 0 18px var(--primary-glow);
      color: #fff;
    }
    .btn-accent {
      background: var(--accent);
      border: none;
      color: white;
      border-radius: var(--radius-pill);
      padding: 0.75rem 2rem;
      font-weight: 600;
      box-shadow: 0 0 18px rgba(255, 46, 99, 0.5);
      transition: var(--transition);
    }
    .btn-accent:hover {
      background: #ff4d7a;
      transform: scale(1.02);
    }

    /* 卡片玻璃 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .glass-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
      border-color: rgba(0, 229, 255, 0.4);
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      padding: 2rem 0;
    }
    .hero-dashboard {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 32px;
      position: relative;
      overflow: hidden;
      min-height: 380px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .dashboard-overlay {
      background: rgba(22, 33, 62, 0.75);
      backdrop-filter: blur(8px);
      width: 100%;
      height: 100%;
      border-radius: 32px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 1.5rem;
    }
    .stat-digit {
      font-family: var(--font-mono);
      font-size: 2.4rem;
      color: var(--primary);
      text-shadow: 0 0 15px var(--primary);
    }

    /* 亮点网格 */
    .icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(0, 229, 255, 0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: var(--primary);
      transition: 0.3s;
    }
    .glass-card:hover .icon-circle {
      box-shadow: 0 0 25px var(--primary);
    }

    /* 案例卡片 */
    .case-img {
      height: 180px;
      object-fit: cover;
      border-radius: 16px 16px 0 0;
    }

    /* 对比表 */
    .table-glass {
      background: transparent;
      color: var(--text-main);
    }
    .table-glass th {
      background: #0f0f1f;
      color: var(--primary);
      font-weight: 600;
      border-bottom: 2px solid var(--primary);
    }
    .table-glass td, .table-glass th {
      border-color: rgba(255,255,255,0.08);
      padding: 1rem;
    }
    .plan-recommend {
      border: 2px solid var(--primary);
      box-shadow: 0 0 20px rgba(0,229,255,0.3);
    }

    /* FAQ */
    .accordion-button {
      background: rgba(22, 33, 62, 0.7);
      backdrop-filter: blur(10px);
      color: #fff;
      font-weight: 500;
      border: 1px solid var(--card-border);
    }
    .accordion-button:not(.collapsed) {
      background: rgba(0, 229, 255, 0.15);
      color: var(--primary);
      box-shadow: none;
    }
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 1rem;
    }

    /* 表单 */
    .input-glow {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(0,229,255,0.3);
      color: white;
      border-radius: 50px;
      padding: 0.75rem 1.5rem;
      transition: 0.2s;
    }
    .input-glow:focus {
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(0,229,255,0.4);
      outline: none;
    }

    footer {
      background: #0A0A14;
      border-top: 1px solid var(--primary);
    }
    .social-icon {
      width: 40px;
      height: 40px;
      background: rgba(255,255,255,0.05);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #B0B0B0;
      transition: 0.3s;
    }
    .social-icon:hover {
      background: var(--primary);
      color: #0A0A14;
      box-shadow: 0 0 15px var(--primary);
    }