/* roulang page: index */
:root {
      --primary: #1A3C34;
      --primary-soft: rgba(26, 60, 52, 0.08);
      --accent-gold: #E8B86D;
      --accent-gold-hover: #D4A24A;
      --accent-terracotta: #C44D34;
      --bg-warm: #F7F3EB;
      --bg-light: #FFFFFF;
      --bg-alternate: #F0EDE6;
      --text-body: #2C2C2C;
      --text-muted: #5A5A5A;
      --border-light: #E0DCD3;
      --shadow-card: 0 2px 12px rgba(26, 60, 52, 0.06);
      --shadow-card-hover: 0 8px 24px rgba(26, 60, 52, 0.10);
      --radius-card: 12px;
      --radius-inner: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --container-max: 1200px;
      --section-gap: 80px;
    }

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

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

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 标题系统 */
    h1 {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: #FFFFFF;
    }

    h2 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--primary);
      margin-bottom: 16px;
    }

    h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--text-body);
    }

    @media (max-width: 767px) {
      h1 { font-size: 32px; }
      h2 { font-size: 24px; }
      :root { --section-gap: 48px; }
    }

    /* 按钮系统 */
    .btn-primary {
      background-color: var(--accent-gold);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-inner);
      text-decoration: none;
      display: inline-block;
      transition: all 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 16px;
    }

    .btn-primary:hover {
      background-color: var(--accent-gold-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-inner);
      text-decoration: none;
      display: inline-block;
      transition: all 0.2s ease;
      font-size: 16px;
    }

    .btn-secondary:hover {
      background-color: var(--primary-soft);
      transform: translateY(-2px);
    }

    /* 卡片系统 */
    .card {
      background: var(--bg-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 24px;
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }

    .service-icon {
      width: 64px;
      height: 64px;
      background-color: rgba(26, 60, 52, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-size: 28px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    @media (max-width: 991px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
      .grid-3 { grid-template-columns: 1fr; }
      .card { padding: 20px; }
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      z-index: 100;
      border-bottom: 1px solid var(--border-light);
      padding: 12px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-weight: 700;
      font-size: 24px;
      color: var(--primary);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo-symbol {
      display: inline-flex;
      width: 24px;
      height: 24px;
      position: relative;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-body);
      text-decoration: none;
      font-weight: 500;
      position: relative;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 26px;
      color: var(--primary);
      cursor: pointer;
    }
    @media (max-width: 767px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: var(--primary);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
      }
      .nav-links.active { display: flex; }
      .nav-links a { color: white; }
      .hamburger { display: block; }
    }

    /* Hero */
    .hero {
      background: linear-gradient(180deg, rgba(26,60,52,0.8) 0%, rgba(15,40,34,0.95) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      margin-top: 60px;
    }
    .hero-content {
      max-width: 700px;
    }
    .hero-sub {
      font-size: 18px;
      opacity: 0.85;
      margin: 20px 0 32px;
    }
    .trust-badges {
      display: flex;
      gap: 40px;
      margin-top: 40px;
      font-weight: 500;
    }
    @media (max-width: 767px) {
      .trust-badges { flex-direction: column; gap: 12px; }
    }

    section {
      padding: var(--section-gap) 0;
    }
    .bg-white { background-color: var(--bg-light); }
    .bg-alternate { background-color: var(--bg-alternate); }

    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }

    .footer {
      background: var(--primary);
      color: rgba(255,255,255,0.85);
      padding: 64px 0 32px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer a {
      color: rgba(255,255,255,0.8);
      text-decoration: none;
    }
    .footer a:hover { color: var(--accent-gold); }
    @media (max-width: 767px) {
      .footer-grid { grid-template-columns: 1fr; }
    }

    .faq-item {
      background: var(--bg-light);
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }

    .img-cover {
      width: 100%;
      height: auto;
      border-radius: var(--radius-card);
      object-fit: cover;
    }