/* roulang page: index */
/* 设计变量与深度定制 */
    :root {
      --primary: #2D4A3E;
      --primary-dark: #1E2F2A;
      --accent: #E8B86D;
      --accent-light: #f5e5cb;
      --bg-warm: #FBF7F2;
      --card-bg: #FFFFFF;
      --text-main: #2D2A26;
      --text-soft: #6B6A65;
      --text-light: #9C9A94;
      --border-soft: #E8E3DC;
      --radius-card: 16px;
      --radius-btn: 12px;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Inter', 'Noto Sans SC', sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.6;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, .serif {
      font-family: var(--font-serif);
      font-weight: 500;
      letter-spacing: -0.01em;
    }
    
    h1 {
      font-size: 3rem;
      line-height: 1.2;
    }
    h2 {
      font-size: 2.25rem;
      line-height: 1.3;
    }
    h3 {
      font-size: 1.5rem;
      line-height: 1.4;
    }
    
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }
    
    /* 导航杂志频道风格 */
    .nav-blur {
      backdrop-filter: blur(12px);
      background-color: rgba(251, 247, 242, 0.85);
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }
    .nav-scrolled {
      background-color: rgba(251, 247, 242, 0.95);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }
    
    .channel-pill {
      transition: all 0.2s ease;
      border-radius: 40px;
      padding: 0.5rem 1.25rem;
      font-weight: 500;
      color: var(--text-soft);
      background: transparent;
      border: 1px solid transparent;
    }
    .channel-pill:hover {
      background-color: rgba(45, 74, 62, 0.08);
      color: var(--primary);
      border-color: transparent;
    }
    .channel-pill.active {
      color: var(--primary);
      border-bottom: 2px solid var(--accent);
      border-radius: 0;
      background: transparent;
      font-weight: 600;
    }
    
    /* 按钮体系 */
    .btn-primary {
      background-color: var(--accent);
      color: var(--primary);
      font-weight: 600;
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-btn);
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(232, 184, 109, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary);
      color: white;
      box-shadow: 0 8px 20px rgba(45, 74, 62, 0.25);
      transform: translateY(-2px);
    }
    
    .btn-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s ease;
      display: inline-block;
    }
    .btn-outline:hover {
      background-color: var(--accent);
      border-color: var(--accent);
      color: var(--primary);
    }
    
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 500;
      transition: all 0.3s ease;
    }
    .btn-secondary:hover {
      background-color: rgba(45,74,62,0.06);
      border-color: var(--primary-dark);
    }
    
    /* 卡片系统 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.3s ease;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    
    /* 深色区块 */
    .dark-block {
      background-color: var(--primary-dark);
      color: white;
    }
    
    /* FAQ 折叠动画 */
    .faq-item {
      border-bottom: 1px solid var(--border-soft);
    }
    .faq-question {
      cursor: pointer;
      font-weight: 600;
      padding: 1.2rem 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.1rem;
      color: var(--text-main);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      color: var(--text-soft);
      padding: 0 0;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-bottom: 1.5rem;
    }
    .faq-icon {
      transition: transform 0.3s ease;
      color: var(--primary);
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    
    /* 移动端频道横向滚动 */
    .channels-scroll {
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
      display: flex;
      gap: 0.5rem;
    }
    .channels-scroll::-webkit-scrollbar {
      display: none;
    }
    
    @media (max-width: 768px) {
      h1 {
        font-size: 2.2rem;
      }
      h2 {
        font-size: 1.9rem;
      }
      .container-custom {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }
      .btn-primary, .btn-outline {
        padding: 0.8rem 2rem;
        width: 100%;
        text-align: center;
      }
    }