/* roulang page: index */
:root {
      --primary-gold: #C8A27A;
      --deep-charcoal: #2B2B2B;
      --soft-linen: #F7F3ED;
      --accent-amber: #E07B39;
      --white: #FFFFFF;
      --border-light: rgba(0,0,0,0.05);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-btn: 30px;
      --transition: 0.25s ease;
      --font-h1: 3rem;
      --font-h2: 2.2rem;
      --font-h3: 1.5rem;
      --font-body: 1rem;
      --font-small: 0.875rem;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--soft-linen);
      color: var(--deep-charcoal);
      line-height: 1.6;
      margin: 0;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .btn {
      border-radius: var(--radius-btn);
      padding: 0.8rem 2rem;
      font-weight: 600;
      transition: all var(--transition);
    }
    .btn-primary-gold {
      background-color: var(--accent-amber);
      border: 2px solid var(--accent-amber);
      color: var(--white);
    }
    .btn-primary-gold:hover, .btn-primary-gold:focus {
      background-color: #C96A2E;
      border-color: #C96A2E;
      color: var(--white);
    }
    .btn-outline-gold {
      background: transparent;
      border: 2px solid var(--primary-gold);
      color: var(--primary-gold);
    }
    .btn-outline-gold:hover {
      background: var(--primary-gold);
      color: var(--white);
    }
    /* 导航杂志频道风格 */
    .navbar-brand-custom {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .logo-icon {
      width: 40px;
      height: 40px;
      background: var(--primary-gold);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.5rem;
      position: relative;
      overflow: hidden;
    }
    .logo-text {
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--deep-charcoal);
      letter-spacing: 0.02em;
    }
    .channel-nav .nav-link {
      color: var(--deep-charcoal);
      font-weight: 500;
      padding: 0.6rem 1.2rem;
      border-bottom: 3px solid transparent;
      transition: all var(--transition);
      font-size: 1rem;
      white-space: nowrap;
    }
    .channel-nav .nav-link:hover {
      color: var(--accent-amber);
    }
    .channel-nav .nav-link.active {
      border-bottom-color: var(--primary-gold);
      color: var(--primary-gold);
    }
    .sticky-nav {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: var(--white);
      box-shadow: 0 2px 15px rgba(0,0,0,0.04);
    }
    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, var(--soft-linen) 0%, #fff 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-decor {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.08;
      pointer-events: none;
    }
    .data-badge {
      background: var(--white);
      border-radius: 20px;
      padding: 1.2rem 1.5rem;
      box-shadow: var(--shadow-card);
      text-align: center;
    }
    .data-badge .number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-amber);
      line-height: 1.2;
      font-feature-settings: "tnum";
    }
    /* 卡片 */
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      overflow: hidden;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-card img {
      border-radius: var(--radius-card) var(--radius-card) 0 0;
      height: 200px;
      object-fit: cover;
      width: 100%;
    }
    .comparison-card {
      background: #f0ebe2;
      border-radius: var(--radius-card);
      padding: 2rem;
      position: relative;
    }
    .comparison-card.gold {
      background: #faf5ef;
      border: 1px solid var(--primary-gold);
    }
    .vs-badge {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: var(--accent-amber);
      color: white;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      z-index: 5;
    }
    .accordion-button:not(.collapsed) {
      background-color: #fdfaf7;
      color: var(--deep-charcoal);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary-gold);
      box-shadow: 0 0 0 0.15rem rgba(200,162,122,0.25);
    }
    .footer-dark {
      background: var(--deep-charcoal);
      color: #ddd;
    }
    .footer-dark a {
      color: #ccc;
    }
    .footer-dark a:hover {
      color: var(--accent-amber);
    }
    @media (max-width: 768px) {
      :root {
        --font-h1: 2.3rem;
        --font-h2: 1.8rem;
      }
      .vs-badge {
        position: static;
        margin: 1rem auto;
        transform: none;
      }
    }