/* roulang page: index */
/* 设计变量与全局重置 */
    :root {
      --primary-red: #D32F2F;
      --primary-dark: #B71C1C;
      --accent-orange: #FF6D00;
      --deep-gray: #1E1E1E;
      --warm-white: #FAFAFA;
      --light-gray: #F0F0F0;
      --border-light: #E0E0E0;
      --text-gray: #757575;
      --text-light: #BDBDBD;
      --card-shadow: 0 2px 8px rgba(0,0,0,0.04);
      --card-hover-shadow: 0 8px 24px rgba(0,0,0,0.10);
      --radius-md: 12px;
      --radius-btn: 8px;
      --radius-capsule: 40px;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      background-color: var(--warm-white);
      color: #212121;
      line-height: 1.6;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    /* 容器与布局 */
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航：悬浮胶囊样式 */
    .nav-capsule {
      background: rgba(30, 30, 30, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 40px;
      max-width: 720px;
      margin: 0 auto;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
      transition: all 0.3s ease;
    }
    .nav-link {
      color: white;
      font-weight: 500;
      font-size: 0.95rem;
      text-decoration: none;
      padding: 0.5rem 0.75rem;
      border-radius: 24px;
      transition: color 0.2s, background 0.2s;
    }
    .nav-link:hover {
      color: var(--accent-orange);
      background: rgba(255,255,255,0.1);
    }
    .nav-brand {
      font-weight: 700;
      font-size: 1.2rem;
      color: white;
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .nav-brand i {
      color: var(--accent-orange);
    }
    /* 移动端底部固定导航 */
    @media (max-width: 640px) {
      .nav-capsule {
        position: fixed;
        bottom: 16px;
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        max-width: 100%;
        border-radius: 32px;
        z-index: 50;
        padding: 8px 16px;
        background: rgba(30,30,30,0.9);
        justify-content: space-around;
        flex-wrap: wrap;
      }
      .nav-brand {
        font-size: 1rem;
      }
      .nav-link {
        font-size: 0.8rem;
        padding: 0.4rem 0.5rem;
      }
    }
    /* 按钮样式 */
    .btn-primary {
      background-color: var(--primary-red);
      color: white;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      border: none;
      cursor: pointer;
      transition: all 0.2s ease;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 2px 6px rgba(211,47,47,0.3);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
      transform: translateY(-1px);
    }
    .btn-accent {
      background-color: var(--accent-orange);
      color: white;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      border: none;
      cursor: pointer;
      transition: all 0.2s;
      text-decoration: none;
      box-shadow: 0 4px 10px rgba(255,109,0,0.4);
    }
    .btn-accent:hover {
      background-color: #e65c00;
      box-shadow: 0 6px 14px rgba(255,109,0,0.6);
    }
    .btn-ghost {
      background: transparent;
      border: 1.5px solid var(--primary-red);
      color: var(--primary-red);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 10px 28px;
      transition: all 0.2s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-ghost:hover {
      background-color: #FFEBEE;
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }
    /* 卡片组件 */
    .card {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease;
      overflow: hidden;
    }
    .card:hover {
      box-shadow: var(--card-hover-shadow);
      border-color: var(--primary-red);
      transform: translateY(-2px);
    }
    /* FAQ 折叠面板 */
    .faq-item {
      background: var(--warm-white);
      border-bottom: 1px solid var(--border-light);
      padding: 16px;
      transition: background 0.2s;
    }
    .faq-question {
      font-weight: 700;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      gap: 12px;
      cursor: pointer;
      position: relative;
    }
    .faq-question::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 24px;
      background-color: var(--primary-red);
      border-radius: 2px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: white;
      padding-left: 24px;
      color: #424242;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
      padding-bottom: 8px;
    }
    /* Hero 比分卡片模拟 */
    .score-sim {
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(16px);
      border-radius: 20px;
      padding: 20px;
      border: 1px solid rgba(255,255,255,0.3);
      color: white;
      display: inline-block;
    }
    .score-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-orange);
    }
    /* 装饰水印 */
    .data-bg-dot {
      background-image: radial-gradient(circle, #e0e0e0 1px, transparent 1px);
      background-size: 20px 20px;
    }
    /* 表单 */
    .input-field {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-btn);
      padding: 12px 16px;
      width: 100%;
      transition: border 0.2s;
    }
    .input-field:focus {
      outline: none;
      border-color: var(--primary-red);
      box-shadow: 0 0 0 3px rgba(211,47,47,0.1);
    }
    footer a {
      color: var(--text-light);
      text-decoration: none;
      transition: color 0.2s;
    }
    footer a:hover {
      color: white;
    }