/* roulang page: index */
:root {
      --deep-blue: #0A0E27;
      --electric-blue: #00D4FF;
      --amber-orange: #FF6B35;
      --success-green: #00E676;
      --card-bg: rgba(15, 25, 50, 0.7);
      --text-primary: #E0E6F0;
      --text-secondary: #8892B0;
      --border-light: rgba(0, 212, 255, 0.15);
      --border-glow: rgba(0, 212, 255, 0.5);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --radius-card: 16px;
      --radius-btn: 50px;
      --font-mono: 'DIN Alternate', 'Roboto Mono', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--deep-blue);
      font-family: var(--font-sans);
      color: var(--text-primary);
      margin: 0;
      line-height: 1.7;
      overflow-x: hidden;
      background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

    .glass-card:hover {
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 24px rgba(0, 212, 255, 0.25);
      border-color: var(--border-glow);
      transform: translateY(-4px);
    }

    /* 按钮系统 */
    .btn-primary-glow {
      background: linear-gradient(135deg, #00B4E6, #00D4FF);
      border: none;
      border-radius: var(--radius-btn);
      color: white;
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 12px 32px;
      box-shadow: 0 0 18px rgba(0, 212, 255, 0.5);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-primary-glow:hover {
      box-shadow: 0 0 28px rgba(0, 212, 255, 0.8);
      transform: translateY(-2px);
      color: white;
    }

    .btn-outline-blue {
      background: transparent;
      border: 1.5px solid var(--electric-blue);
      border-radius: var(--radius-btn);
      color: var(--electric-blue);
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 12px 32px;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-outline-blue:hover {
      background: rgba(0, 212, 255, 0.1);
      border-color: #80e8ff;
      color: #fff;
    }

    .btn-accent-amber {
      background: var(--amber-orange);
      border: none;
      border-radius: var(--radius-btn);
      color: white;
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 14px 36px;
      box-shadow: 0 0 20px rgba(255, 107, 53, 0.5);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-accent-amber:hover {
      background: #E55A2B;
      box-shadow: 0 0 30px rgba(255, 107, 53, 0.8);
      transform: translateY(-2px);
      color: white;
    }

    /* 导航 */
    .navbar-brand {
      font-size: 28px;
      font-weight: 700;
      background: linear-gradient(to right, #00D4FF, #80F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
    }
    .navbar-brand i {
      font-size: 30px;
      margin-right: 6px;
      background: linear-gradient(135deg, #00D4FF, #0099cc);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-pills .nav-link {
      color: #B0B8CC;
      border-radius: 30px;
      padding: 6px 18px;
      font-size: 14px;
      font-weight: 500;
      background: rgba(255,255,255,0.05);
      margin: 0 4px;
    }
    .nav-pills .nav-link.active {
      background: linear-gradient(135deg, #00D4FF, #0099cc);
      color: white !important;
    }
    .nav-pills .nav-link:hover:not(.active) {
      background: rgba(0,212,255,0.15);
      color: #E0E6F0;
    }

    .navbar-second {
      overflow-x: auto;
      white-space: nowrap;
      flex-wrap: nowrap;
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    .navbar-second::-webkit-scrollbar {
      display: none;
    }

    /* 板块标题 */
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 12px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 3px;
      background: linear-gradient(to right, var(--electric-blue), transparent);
    }
    .text-center .section-title::after {
      left: 50%;
      transform: translateX(-50%);
    }

    /* 数据数字动画 */
    @keyframes pulse-glow {
      0% { text-shadow: 0 0 4px rgba(0,212,255,0.4); }
      50% { text-shadow: 0 0 12px rgba(0,212,255,0.8); }
      100% { text-shadow: 0 0 4px rgba(0,212,255,0.4); }
    }
    .data-number {
      font-family: var(--font-mono);
      font-weight: 700;
      animation: pulse-glow 2s infinite;
      color: var(--electric-blue);
    }
    .data-number.amber {
      color: var(--amber-orange);
      animation: pulse-glow 2s infinite;
      text-shadow: 0 0 8px rgba(255,107,53,0.6);
    }

    /* 表单 */
    .form-control-glass {
      background: rgba(15,25,50,0.5);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(0,212,255,0.3);
      border-radius: 30px;
      color: white;
      padding: 12px 20px;
    }
    .form-control-glass:focus {
      border-color: var(--electric-blue);
      box-shadow: 0 0 15px rgba(0,212,255,0.4);
      background: rgba(20,30,60,0.7);
      color: white;
    }

    footer {
      background: #060A1C;
      color: #6B7280;
      font-size: 14px;
    }
    footer a {
      color: #8892B0;
      text-decoration: none;
    }
    footer a:hover {
      color: var(--electric-blue);
    }

    @media (max-width: 768px) {
      .glass-card {
        backdrop-filter: blur(8px);
        padding: 20px;
      }
      .section-title {
        font-size: 26px;
      }
    }