/* roulang page: index */
:root {
      --primary-blue: #1A5FDC;
      --accent-orange: #FF6B35;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-soft: #EEF2F6;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-dark: #1E293B;
      --border-light: #E2E8F0;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 20px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 4px 20px rgba(26,95,220,0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: all 0.25s ease;
    }

    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航栏毛玻璃 */
    .glass-nav {
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226,232,240,0.5);
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }

    .nav-link {
      color: #475569;
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 0.25rem 0;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-blue);
      transition: width 0.3s ease;
    }
    .nav-link:hover {
      color: var(--primary-blue);
    }
    .nav-link:hover::after {
      width: 100%;
    }

    /* 按钮系统 */
    .btn-primary {
      background: var(--accent-orange);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 2px 8px rgba(255,107,53,0.25);
      letter-spacing: 0.3px;
      transition: all 0.3s;
    }
    .btn-primary:hover {
      background: #E55A2B;
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(255,107,53,0.35);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-blue);
      color: var(--primary-blue);
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: rgba(26,95,220,0.08);
      transform: translateY(-1px);
    }

    .text-link {
      color: var(--primary-blue);
      font-weight: 500;
      position: relative;
      display: inline-block;
    }
    .text-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 1.5px;
      background: var(--primary-blue);
      transition: width 0.3s;
    }
    .text-link:hover::after {
      width: 100%;
    }

    /* 呼吸灯徽章 */
    .badge-pulse {
      background: rgba(255,107,53,0.12);
      color: var(--accent-orange);
      font-size: 0.8rem;
      font-weight: 600;
      border-radius: 20px;
      padding: 4px 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      animation: softPulse 2.2s infinite;
    }
    @keyframes softPulse {
      0% { box-shadow: 0 0 0 0 rgba(255,107,53,0.35); }
      70% { box-shadow: 0 0 0 10px rgba(255,107,53,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,107,53,0); }
    }

    /* 卡片系统 */
    .card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
      border-color: rgba(26,95,220,0.15);
    }

    /* 瀑布流 */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
    }

    /* FAQ手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      font-weight: 600;
      color: var(--text-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.2rem 0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      background: #F8FAFC;
      border-radius: 0 0 8px 8px;
      color: #475569;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 1rem 1.2rem;
    }
    .faq-icon {
      color: var(--accent-orange);
      font-size: 1.5rem;
      font-weight: 400;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 数字动画 */
    .count-num {
      font-family: var(--font-number);
      font-weight: 700;
      color: var(--primary-blue);
    }

    @media (max-width: 1023px) {
      .masonry-grid {
        column-count: 2;
      }
    }
    @media (max-width: 767px) {
      .container-custom {
        padding-left: 20px;
        padding-right: 20px;
      }
      .masonry-grid {
        column-count: 1;
      }
      h1 {
        font-size: 2rem !important;
        line-height: 1.25 !important;
      }
      h2 {
        font-size: 1.8rem !important;
      }
    }

    /* 汉堡菜单 */
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: white;
      position: absolute;
      top: 70px;
      left: 0;
      width: 100%;
      box-shadow: 0 12px 24px rgba(0,0,0,0.08);
      padding: 1rem 2rem;
      gap: 0.8rem;
      border-top: 1px solid var(--border-light);
    }
    #menu-toggle:checked ~ .mobile-menu {
      display: flex;
    }
    .hamburger-icon {
      display: none;
      font-size: 1.8rem;
      cursor: pointer;
    }
    @media (max-width: 767px) {
      .desktop-nav {
        display: none;
      }
      .hamburger-icon {
        display: block;
      }
    }