/* roulang page: index */
:root {
      --primary-deep: #1E2A3A;
      --accent-gold: #C8A96E;
      --bg-warm: #FAF7F2;
      --card-white: #FFFFFF;
      --text-heading: #2C2C2C;
      --text-body: #5A5A5A;
      --accent-red: #8B3A3A;
      --border-soft: #E5DFD5;
      --hover-bg: #F5F0E8;
      --shadow-sm: 0 2px 12px rgba(30,42,58,0.06), 0 1px 3px rgba(30,42,58,0.04);
      --shadow-md: 0 8px 24px rgba(30,42,58,0.10), 0 2px 6px rgba(30,42,58,0.06);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --transition: 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      font-weight: 400;
      font-size: 16px;
    }
    h1, h2, h3, h4 {
      color: var(--text-heading);
      font-weight: 600;
      letter-spacing: -0.02em;
    }
    h1 {
      font-weight: 700;
      font-size: 48px;
      line-height: 1.2;
      color: var(--primary-deep);
    }
    h2 {
      font-size: 36px;
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 22px;
      line-height: 1.4;
    }
    h4 {
      font-size: 16px;
    }
    a {
      color: var(--primary-deep);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--accent-gold);
    }
    .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
      margin: 0 auto;
    }
    /* 按钮系统 */
    .btn-primary-custom {
      background-color: var(--accent-gold);
      border: 1.5px solid var(--accent-gold);
      color: white;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-weight: 500;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }
    .btn-primary-custom:hover {
      background-color: #B8995E;
      border-color: #B8995E;
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid var(--primary-deep);
      color: var(--primary-deep);
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-weight: 500;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }
    .btn-outline-custom:hover {
      background-color: var(--primary-deep);
      color: white;
    }
    .btn-lg-custom {
      padding: 14px 32px;
      font-size: 18px;
    }
    .text-link {
      color: var(--accent-gold);
      background: none;
      border: none;
      padding: 0;
      position: relative;
      text-decoration: none;
    }
    .text-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 0;
      height: 1.5px;
      background: var(--accent-gold);
      transition: width 0.3s ease;
    }
    .text-link:hover::after {
      width: 100%;
    }
    /* 导航栏 */
    .navbar {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-soft);
      padding: 0;
      height: 72px;
      transition: all 0.3s;
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 20px;
      color: var(--primary-deep) !important;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
    }
    .navbar-brand i {
      color: var(--accent-gold);
      margin-right: 8px;
      font-size: 24px;
    }
    .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      padding: 8px 18px;
      border-radius: 20px;
      margin: 0 4px;
      transition: var(--transition);
      font-size: 15px;
    }
    .nav-link:hover, .nav-link.active {
      background-color: var(--hover-bg);
      color: var(--primary-deep) !important;
    }
    .nav-link.active {
      background-color: var(--primary-deep);
      color: white !important;
    }
    .navbar .btn-primary-custom {
      padding: 8px 20px;
      margin-left: 12px;
    }
    .navbar-toggler {
      border: none;
      color: var(--primary-deep);
    }
    @media (max-width: 991px) {
      .navbar {
        height: auto;
        min-height: 60px;
      }
      .navbar-collapse {
        background: var(--bg-warm);
        padding: 20px;
        border-radius: 0 0 16px 16px;
        box-shadow: var(--shadow-md);
      }
      .nav-link {
        margin: 6px 0;
      }
      .navbar .btn-primary-custom {
        margin: 12px 0 0;
      }
    }
    /* Hero */
    .hero-section {
      padding: 100px 0 80px;
    }
    .hero-title {
      font-size: 48px;
      margin-bottom: 1.5rem;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-body);
      margin-bottom: 2rem;
    }
    .hero-image {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 16px;
      height: 400px;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
    }
    .hero-image::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(135deg, rgba(200,169,110,0.15) 0%, rgba(30,42,58,0.1) 100%);
    }
    .trust-badges {
      display: flex;
      gap: 24px;
      margin-top: 2rem;
      font-size: 13px;
      color: var(--text-body);
    }
    .trust-badges div {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    /* 卡片 */
    .card-custom {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: none;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .icon-circle {
      width: 56px;
      height: 56px;
      background: var(--hover-bg);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-gold);
      font-size: 24px;
      margin-bottom: 20px;
    }
    .feature-grid .first-card {
      border-left: 3px solid var(--accent-red);
    }
    /* 数据带 */
    .data-strip {
      background: linear-gradient(135deg, #E8EDF2 0%, #F0F4F7 100%);
      padding: 60px 0;
    }
    .counter-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-deep);
      border-bottom: 2px solid var(--accent-gold);
      display: inline-block;
      padding-bottom: 6px;
      margin-bottom: 8px;
    }
    /* 瀑布流 */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: all 0.3s;
    }
    .masonry-item:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .masonry-item img {
      width: 100%;
      display: block;
      transition: transform 0.4s ease;
    }
    .masonry-item:hover img {
      transform: scale(1.03);
    }
    .tag-red {
      background: var(--accent-red);
      color: white;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
    }
    /* 案例交替 */
    .case-block {
      margin-bottom: 60px;
    }
    .case-img {
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card);
      aspect-ratio: 4 / 3;
    }
    /* FAQ */
    .faq-filters .badge-filter {
      background: var(--hover-bg);
      color: var(--text-heading);
      padding: 10px 20px;
      border-radius: 20px;
      margin-bottom: 8px;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-filters .badge-filter.active {
      background: var(--primary-deep);
      color: white;
    }
    .accordion-button {
      font-weight: 600;
      color: var(--primary-deep);
      background: white;
      box-shadow: none;
      padding: 18px 24px;
    }
    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--primary-deep);
      border-bottom: 2px solid var(--accent-gold);
    }
    /* CTA横幅 */
    .cta-banner {
      background: var(--primary-deep);
      padding: 80px 0;
    }
    /* 页脚 */
    .footer {
      background: #F5F2EC;
      color: var(--text-body);
    }
    .footer h4 {
      color: var(--primary-deep);
      margin-bottom: 1.2rem;
    }
    @media (max-width: 992px) {
      .masonry-grid {
        column-count: 2;
      }
    }
    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 26px; }
      .hero-section { padding: 80px 0 60px; }
      .masonry-grid { column-count: 1; }
      .hero-image { height: 240px; margin-top: 2rem; }
      .trust-badges { flex-wrap: wrap; }
    }