/* roulang page: index */
/* ========== 设计变量与全局重置 ========== */
    :root {
      --primary-deep: #1A1F36;
      --primary-soft: #2C3454;
      --accent-gold: #D4A843;
      --accent-light-gold: #FFF8E7;
      --bg-soft-blue: #F8F9FB;
      --bg-highlight: #E8F0FE;
      --text-main: #1E1E1E;
      --text-muted: #5A5A5A;
      --text-on-dark: #FFFFFF;
      --success-green: #0F9D58;
      --border-light: #E0E0E0;
      --input-border: #D0D5DD;
      --shadow-card: 0 8px 24px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 16px 32px rgba(0,0,0,0.08);
      --shadow-nav: 0 2px 12px rgba(0,0,0,0.04);
      --radius-card: 20px;
      --radius-btn: 40px;
      --radius-input: 12px;
      --radius-badge: 40px;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --transition-base: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-soft-blue);
      color: var(--text-main);
      line-height: 1.8;
      margin: 0;
      padding-top: 72px; /* 固定导航高度 */
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .nav-logo-text {
      font-weight: 600;
      letter-spacing: -0.3px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 容器微调 */
    .container-custom {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* ========== 导航 (白底内容平台) ========== */
    .navbar-custom {
      background: #FFFFFF;
      box-shadow: var(--shadow-nav);
      height: 72px;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      display: flex;
      align-items: center;
      padding: 0 24px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent-gold) 0%, #b58b2c 100%);
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      display: inline-block;
    }

    .nav-logo-text {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 0.5px;
    }

    .nav-links-desktop {
      display: flex;
      align-items: center;
      gap: 2rem;
      margin-left: auto;
      margin-right: 2rem;
    }

    .nav-link-item {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
      padding: 0.5rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition-base);
    }

    .nav-link-item:hover,
    .nav-link-item.active {
      color: var(--primary-deep);
      border-bottom: 2px solid var(--accent-gold);
    }

    .search-box {
      background: #F1F4F9;
      border-radius: 40px;
      padding: 0.5rem 1.2rem;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid transparent;
      transition: var(--transition-base);
      margin-right: 1rem;
    }

    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      font-size: 0.9rem;
      width: 140px;
      color: var(--text-main);
    }

    .search-box:focus-within {
      border-color: var(--accent-gold);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(212,168,67,0.15);
    }

    .btn-primary-gold {
      background: linear-gradient(135deg, #D4A843 0%, #b58b2c 100%);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 0.65rem 2rem;
      font-size: 0.95rem;
      transition: var(--transition-base);
      display: inline-block;
      white-space: nowrap;
    }

    .btn-primary-gold:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(212,168,67,0.35);
      background: linear-gradient(135deg, #c49a3a 0%, #9e7626 100%);
      color: white;
    }

    /* 移动端汉堡菜单 */
    .navbar-toggler-custom {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
    }

    @media (max-width: 991px) {
      .nav-links-desktop, .search-box, .btn-primary-gold.d-none.d-lg-inline-block {
        display: none !important;
      }
      .navbar-toggler-custom {
        display: block;
        margin-left: auto;
      }
    }

    /* 移动端全屏菜单 */
    .mobile-menu {
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: white;
      padding: 2rem;
      box-shadow: var(--shadow-nav);
      transform: translateY(-110%);
      transition: transform 0.35s ease;
      z-index: 1040;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .mobile-menu.open {
      transform: translateY(0);
    }
    .mobile-menu .nav-link-item {
      font-size: 1.2rem;
      border-bottom: none;
      padding: 0.8rem 0;
      border-bottom: 1px solid #eee;
    }

    /* ========== 区块通用 ========== */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      h1 {
        font-size: 32px !important;
      }
      h2 {
        font-size: 28px !important;
      }
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 0.8rem;
      color: var(--primary-deep);
    }
    .gold-underline {
      width: 60px;
      height: 4px;
      background: var(--accent-gold);
      margin: 0.5rem 0 1.5rem;
    }
    .text-muted-custom {
      color: var(--text-muted);
    }

    /* 卡片基础 */
    .card-custom {
      background: #FFFFFF;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 2rem;
      transition: var(--transition-base);
      border: 1px solid transparent;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--bg-highlight);
    }

    /* 数据徽章 */
    .badge-number {
      font-weight: 800;
      font-size: 2.2rem;
      color: var(--accent-gold);
      line-height: 1.2;
    }

    /* 按钮系统 */
    .btn-outline-gold {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 0.7rem 2rem;
      transition: var(--transition-base);
    }
    .btn-outline-gold:hover {
      background: var(--accent-light-gold);
      color: #b58b2c;
    }

    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-input);
      border: 1px solid var(--input-border);
      padding: 0.8rem 1.2rem;
      background: #FFFFFF;
      transition: var(--transition-base);
    }
    .form-control-custom:focus {
      border-color: var(--accent-gold);
      box-shadow: 0 0 0 3px rgba(212,168,67,0.15);
    }

    /* FAQ 手风琴覆盖 */
    .accordion-button:not(.collapsed) {
      background-color: #F8F9FB;
      color: var(--primary-deep);
      font-weight: 600;
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--accent-gold);
      box-shadow: 0 0 0 2px rgba(212,168,67,0.2);
    }
    .accordion-item {
      border: 1px solid var(--border-light);
      border-radius: 12px !important;
      margin-bottom: 1rem;
    }

    /* 页脚 */
    .footer-dark {
      background: #1A1F36;
      color: #CCCCCC;
    }
    .footer-dark a:hover {
      color: var(--accent-gold);
    }