/* roulang page: index */
:root {
      --primary: #8B1A2B;
      --primary-hover: #6E1522;
      --gold: #D4A853;
      --gold-light: rgba(212, 168, 83, 0.15);
      --dark-bg: #1A1A2E;
      --warm-bg: #FDF8F5;
      --text-main: #2C2C2C;
      --text-light: #FFFFFF;
      --border-soft: #E8DDD4;
      --success: #2D6A4F;
      --accent: #C44536;
      --shadow-sm: 0 2px 12px rgba(26, 26, 46, 0.06);
      --shadow-hover: 0 8px 28px rgba(26, 26, 46, 0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --bs-primary: #8B1A2B;
      --bs-primary-rgb: 139, 26, 43;
      --bs-border-radius: 12px;
      --bs-body-font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Inter", system-ui, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--bs-body-font-family);
      background-color: var(--warm-bg);
      color: var(--text-main);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      letter-spacing: -0.3px;
    }

    p {
      margin-bottom: 1.2rem;
      color: #4A4A4A;
    }

    .container {
      max-width: 1280px;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航栏 */
    .navbar-custom {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
      padding: 12px 0;
      transition: all 0.25s ease;
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 22px;
      letter-spacing: 0.5px;
      color: var(--primary) !important;
      display: flex;
      align-items: center;
    }
    .navbar-brand span {
      color: #1A1A2E;
      font-weight: 600;
    }
    .brand-icon {
      font-size: 28px;
      margin-right: 8px;
      color: var(--gold);
    }
    .nav-link {
      color: var(--text-main) !important;
      font-weight: 500;
      margin: 0 4px;
      padding: 8px 14px !important;
      border-radius: 30px;
      transition: 0.2s;
      font-size: 15px;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: rgba(139, 26, 43, 0.04);
    }
    .btn-cta-nav {
      background: var(--primary);
      color: white;
      border-radius: 30px;
      padding: 8px 24px;
      font-weight: 600;
      font-size: 15px;
      border: none;
      transition: 0.25s;
      margin-left: 8px;
    }
    .btn-cta-nav:hover {
      background: var(--primary-hover);
      color: white;
    }
    .navbar-toggler {
      border: none;
      padding: 6px 10px;
      font-size: 20px;
      color: var(--primary);
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }

    /* 通用区块 */
    section {
      padding: 90px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    .section-title h2 {
      font-weight: 700;
      font-size: 32px;
      color: #1A1A2E;
      margin-bottom: 16px;
    }
    .section-title .divider {
      width: 60px;
      height: 4px;
      background: var(--gold);
      margin: 12px auto 24px;
    }

    .btn-primary-custom {
      background: var(--primary);
      border: none;
      padding: 12px 32px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      color: white;
      transition: all 0.25s;
      box-shadow: 0 4px 12px rgba(139, 26, 43, 0.3);
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      color: white;
      box-shadow: 0 6px 18px rgba(139, 26, 43, 0.4);
    }
    .btn-outline-gold {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 10px 28px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-outline-gold:hover {
      background: rgba(139, 26, 43, 0.05);
      color: var(--primary);
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #FDF8F5 0%, #F9F2EC 100%);
      position: relative;
      overflow: hidden;
      padding: 80px 0 100px;
    }
    .hero-watermark {
      position: absolute;
      right: 0;
      bottom: 0;
      opacity: 0.08;
      font-size: 240px;
      color: #8B1A2B;
      transform: rotate(-5deg);
      pointer-events: none;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
      color: #1A1A2E;
    }
    .hero-title strong {
      color: var(--primary);
    }
    .metric-float-card {
      background: rgba(255,255,255,0.75);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 18px 20px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(232,221,212,0.7);
      margin-bottom: 16px;
    }
    .metric-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--gold);
      line-height: 1.2;
    }

    /* 指标看板 */
    .metrics-section {
      background: var(--dark-bg);
      color: white;
    }
    .metric-card {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--border-radius-card);
      padding: 28px 20px;
      backdrop-filter: blur(4px);
      transition: 0.2s;
    }
    .metric-card .big-number {
      font-size: 42px;
      font-weight: 700;
      color: var(--gold);
    }

    /* 服务卡片 */
    .service-card {
      background: white;
      border: 1px solid var(--border-soft);
      border-radius: var(--border-radius-card);
      padding: 28px 22px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 42px;
      color: var(--primary);
      margin-bottom: 18px;
    }

    /* 对比区 */
    .compare-card {
      border-radius: 18px;
      padding: 30px;
      background: white;
      border: 1px solid #E8DDD4;
    }
    .compare-better {
      background: rgba(139, 26, 43, 0.03);
      border: 2px solid var(--gold);
    }

    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: rgba(139, 26, 43, 0.04);
      color: var(--primary);
      font-weight: 600;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: #E8DDD4;
    }

    /* 表单 */
    .form-control-custom {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.25);
      color: white;
      border-radius: 8px;
      padding: 12px 16px;
    }
    .form-control-custom::placeholder {
      color: rgba(255,255,255,0.6);
    }

    footer {
      background: #1A1A2E;
      color: #CCCCCC;
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 30px;
      }
      .metric-float-card {
        display: inline-block;
        width: 30%;
        margin-right: 2%;
      }
    }