/* roulang page: index */
:root {
      --bs-primary: #B8860B;
      --bs-primary-rgb: 184, 134, 11;
      --bs-body-font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      --bs-body-color: #2D2D2D;
      --bs-body-bg: #FAFAFA;
      --color-gold: #B8860B;
      --color-gold-light: #E6C27A;
      --color-gold-pale: #FFF9F0;
      --color-warm-bg: #F5F0E8;
      --color-dark: #2D2D2D;
      --color-darker: #1A1A1A;
      --color-charcoal: #2D2D2D;
      --card-radius: 16px;
      --card-shadow: 0 2px 12px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 12px 28px rgba(0,0,0,0.08);
      --btn-radius: 8px;
      --transition-base: 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--bs-body-font-family);
      color: var(--bs-body-color);
      background-color: var(--bs-body-bg);
      line-height: 1.7;
      letter-spacing: 0.01em;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--color-gold);
      text-decoration: none;
      transition: color var(--transition-base);
    }
    a:hover {
      color: #8B6508;
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-padding {
      padding: 120px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 80px 0;
      }
    }

    /* 导航栏 */
    .navbar {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 16px rgba(0,0,0,0.04);
      padding: 12px 0;
      transition: background var(--transition-base), box-shadow var(--transition-base);
    }
    .navbar.sticky-active {
      background: rgba(255,255,255,0.98);
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--color-dark) !important;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
    }
    .navbar-brand i {
      color: var(--color-gold);
      font-size: 1.8rem;
      margin-right: 8px;
    }
    .navbar-nav .nav-link {
      color: var(--color-dark) !important;
      font-weight: 500;
      margin: 0 8px;
      padding: 8px 4px !important;
      position: relative;
      transition: color var(--transition-base);
    }
    .navbar-nav .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--color-gold);
      transition: width var(--transition-base);
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--color-gold) !important;
    }
    .navbar-nav .nav-link:hover::after,
    .navbar-nav .nav-link.active::after {
      width: 100%;
    }
    .navbar .btn-outline-gold {
      border: 2px solid var(--color-gold);
      color: var(--color-gold);
      background: transparent;
      padding: 8px 20px;
      border-radius: 50px;
      font-weight: 600;
      transition: all var(--transition-base);
      white-space: nowrap;
    }
    .navbar .btn-outline-gold:hover {
      background: var(--color-gold);
      color: white;
    }
    .navbar-toggler {
      border: none;
      color: var(--color-dark);
      font-size: 1.5rem;
    }
    .navbar-toggler:focus {
      box-shadow: none;
      outline: 2px solid var(--color-gold);
      outline-offset: 2px;
    }
    @media (max-width: 991px) {
      .navbar-nav {
        background: white;
        border-radius: 16px;
        padding: 20px;
        margin-top: 12px;
        box-shadow: 0 12px 28px rgba(0,0,0,0.08);
      }
    }

    /* Hero */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(135deg, #2D2D2D 0%, #1A1A1A 100%);
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: left;
      color: white;
    }
    .hero-section::before {
      content: "";
      position: absolute;
      top: -20%;
      right: -10%;
      width: 70%;
      height: 140%;
      background: radial-gradient(circle at 30% 40%, rgba(230,194,122,0.15) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-section::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 120px;
      background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 650px;
    }
    .hero-content h1 {
      font-size: 3.5rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: white;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      color: var(--color-gold-light);
    }
    .hero-content .lead {
      font-size: 1.25rem;
      color: #F5F0E8;
      margin-bottom: 2rem;
      opacity: 0.9;
    }
    .hero-buttons .btn {
      padding: 14px 32px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1rem;
      margin-right: 12px;
      transition: all 0.2s ease;
    }
    .btn-primary-gold {
      background: var(--color-gold);
      border: 2px solid var(--color-gold);
      color: white;
      box-shadow: 0 8px 18px rgba(184,134,11,0.4);
    }
    .btn-primary-gold:hover {
      background: #8B6508;
      border-color: #8B6508;
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(139,101,8,0.5);
      color: white;
    }
    .btn-outline-light-gold {
      border: 2px solid #E6C27A;
      color: #E6C27A;
      background: transparent;
    }
    .btn-outline-light-gold:hover {
      background: #E6C27A;
      color: #1A1A1A;
    }
    @media (max-width: 768px) {
      .hero-section {
        min-height: auto;
        padding: 120px 20px 80px;
        text-align: center;
      }
      .hero-content h1 {
        font-size: 2.4rem;
      }
      .hero-content .lead {
        font-size: 1.1rem;
      }
      .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 12px;
      }
    }

    /* 区块标题 */
    .section-title h2 {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 0.5rem;
      letter-spacing: -0.3px;
    }
    .section-title .subheading {
      color: #6B6B6B;
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }
    @media (max-width: 768px) {
      .section-title h2 {
        font-size: 1.9rem;
      }
    }

    /* 卡片通用 */
    .card-custom {
      background: white;
      border-radius: 16px;
      padding: 2rem;
      box-shadow: var(--card-shadow);
      transition: all var(--transition-base);
      height: 100%;
      border: 1px solid rgba(0,0,0,0.03);
    }
    .card-custom:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      background: var(--color-gold-pale);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: var(--color-gold);
      margin-bottom: 1.5rem;
    }

    /* 服务图文区 */
    .service-row {
      align-items: center;
      margin-bottom: 80px;
    }
    .service-img {
      background-size: cover;
      background-position: center;
      border-radius: 20px;
      min-height: 360px;
      box-shadow: 0 12px 24px rgba(0,0,0,0.06);
    }

    /* 场景卡片 */
    .scenario-card {
      background: white;
      border-radius: 12px;
      padding: 1.8rem;
      border: 1px solid #EDE7DD;
      transition: all var(--transition-base);
    }
    .scenario-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 18px 30px rgba(0,0,0,0.06);
    }

    /* 案例数据 */
    .stat-number {
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--color-gold);
      line-height: 1.1;
    }

    /* 价格卡片 */
    .pricing-card {
      background: white;
      border-radius: 20px;
      padding: 2.5rem 2rem;
      box-shadow: 0 8px 22px rgba(0,0,0,0.04);
      transition: all 0.3s;
      position: relative;
      border: 1px solid #EDE7DD;
    }
    .pricing-card.featured {
      border: 2px solid var(--color-gold);
      background: #FFFDF7;
      transform: scale(1.03);
      box-shadow: 0 16px 32px rgba(184,134,11,0.12);
    }
    .badge-gold {
      background: var(--color-gold);
      color: white;
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: var(--color-gold-pale);
      color: var(--color-dark);
      box-shadow: none;
      border-color: #E0D5C1;
    }
    .accordion-button:focus {
      border-color: var(--color-gold);
      box-shadow: 0 0 0 3px rgba(184,134,11,0.15);
    }
    .accordion-item {
      border: 1px solid #E0D5C1;
      border-radius: 12px !important;
      margin-bottom: 12px;
      overflow: hidden;
    }

    /* CTA 尾屏 */
    .cta-dark {
      background: linear-gradient(135deg, #2D2D2D, #1A1A1A);
      color: white;
      border-radius: 32px;
      padding: 4rem 2rem;
      text-align: center;
    }

    /* Footer */
    .footer-dark {
      background: #1A1A1A;
      color: #B0B0B0;
      padding: 60px 0 20px;
    }
    .footer-dark a {
      color: #B0B0B0;
    }
    .footer-dark a:hover {
      color: var(--color-gold-light);
    }
    .footer-dark h5 {
      color: white;
      font-weight: 600;
    }