/* roulang page: index */
:root {
      --primary: #1A3C34;
      --primary-light: #2A5A4E;
      --accent-gold: #C8A96E;
      --accent-bright: #D4AF37;
      --bg-warm: #FAFAF7;
      --bg-deep: #0F2622;
      --text-heading: #1A1A1A;
      --text-body: #3D3D3D;
      --text-muted: #6B6B6B;
      --border-light: #E5E0D5;
      --bg-card: #FFFFFF;
      --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 8px 24px rgba(26, 60, 52, 0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-serif: 'DM Serif Display', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.8;
      font-weight: 400;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-sans);
      color: var(--text-heading);
      letter-spacing: -0.3px;
    }

    h1 {
      font-size: 2.5rem;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: 1.8rem;
      font-weight: 600;
      line-height: 1.4;
    }

    h3 {
      font-size: 1.25rem;
      font-weight: 600;
      line-height: 1.5;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航 */
    .navbar {
      background: rgba(250, 250, 247, 0.92);
      backdrop-filter: blur(12px);
      height: 64px;
      border-bottom: 1px solid transparent;
      transition: all 0.3s ease;
      padding: 0 20px;
    }

    .navbar.scrolled {
      background: #FAFAF7;
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    }

    .navbar-brand {
      font-family: var(--font-sans);
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--primary) !important;
      letter-spacing: 0.5px;
    }

    .navbar-brand small {
      font-weight: 400;
      font-size: 0.7rem;
      color: var(--accent-gold);
      display: block;
      letter-spacing: 0.8px;
    }

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body) !important;
      margin: 0 0.3rem;
      padding: 0.5rem 0.8rem !important;
      border-radius: 4px;
      transition: 0.2s;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: rgba(26, 60, 52, 0.05);
    }

    .btn-gold-nav {
      background: var(--accent-bright);
      color: var(--primary);
      font-weight: 600;
      font-size: 0.9rem;
      padding: 0.4rem 1.2rem;
      border-radius: 30px;
      border: none;
      transition: 0.2s;
    }

    .btn-gold-nav:hover {
      background: #e0b33c;
      color: #0F2622;
    }

    .navbar-toggler {
      border: none;
      color: var(--primary);
    }

    @media (max-width: 992px) {
      .navbar-collapse {
        background: #FAFAF7;
        padding: 1rem;
        border-radius: 12px;
        box-shadow: var(--shadow-hover);
        margin-top: 0.5rem;
      }
    }

    /* Hero 分屏 */
    .hero-section {
      display: flex;
      min-height: 85vh;
      background: var(--bg-warm);
    }

    .hero-left {
      width: 40%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 4rem 3rem 4rem 5vw;
      background: var(--bg-warm);
    }

    .hero-right {
      width: 60%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 400px;
    }

    .hero-right::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(26, 60, 52, 0.7) 0%, rgba(26, 60, 52, 0.2) 100%);
    }

    .hero-title {
      margin-bottom: 1.2rem;
    }

    .hero-sub {
      font-size: 1.1rem;
      color: var(--text-body);
      margin-bottom: 2rem;
    }

    .btn-primary-custom {
      background: var(--accent-bright);
      color: var(--primary);
      font-weight: 600;
      padding: 0.8rem 2.2rem;
      border-radius: var(--radius-btn);
      border: none;
      transition: 0.25s;
      box-shadow: 0 4px 10px rgba(212, 175, 55, 0.2);
    }

    .btn-primary-custom:hover {
      background: #dbb42c;
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(212, 175, 55, 0.3);
      color: #0F2622;
    }

    .btn-outline-custom {
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 500;
      transition: 0.25s;
      background: transparent;
      margin-left: 12px;
    }

    .btn-outline-custom:hover {
      background: rgba(26, 60, 52, 0.08);
      border-color: var(--primary);
      color: var(--primary);
    }

    @media (max-width: 992px) {
      .hero-section {
        flex-direction: column;
      }
      .hero-left, .hero-right {
        width: 100%;
      }
      .hero-left {
        padding: 2.5rem 1.5rem;
      }
      .hero-right {
        height: 40vh;
        min-height: 280px;
      }
      h1 {
        font-size: 2rem;
      }
    }

    /* 指标看板 */
    .stats-section {
      background: #F3F0EA;
      padding: 4rem 0;
    }
    .stat-number {
      font-family: var(--font-serif);
      font-size: 2.8rem;
      color: var(--accent-bright);
      font-weight: 700;
      letter-spacing: 0.5px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 服务卡片 */
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      border-left: 4px solid var(--accent-gold);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-left-width: 8px;
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      object-fit: cover;
      margin-bottom: 1.2rem;
    }
    .service-title {
      border-bottom: 2px solid var(--primary);
      padding-bottom: 0.6rem;
      margin-bottom: 1rem;
      display: inline-block;
      width: auto;
    }

    /* 对比区块 */
    .compare-bad {
      background: #f0eded;
      border-radius: 12px;
      padding: 2rem;
      color: #5a5a5a;
    }
    .compare-good {
      background: rgba(26, 60, 52, 0.08);
      border-left: 4px solid var(--accent-gold);
      border-radius: 12px;
      padding: 2rem;
    }
    .check-icon {
      color: var(--accent-bright);
      margin-right: 0.5rem;
    }

    /* FAQ */
    .accordion-button {
      background: #FAFAF7;
      border-bottom: 1px solid var(--border-light);
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--text-heading);
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: #F3F0EA;
      color: var(--primary);
    }
    .accordion-body {
      line-height: 1.8;
      color: var(--text-body);
    }

    /* CTA */
    .cta-section {
      background: #0F2622;
      background-image: radial-gradient(circle at 80% 20%, rgba(212, 175, 55, 0.15) 0%, transparent 60%);
      padding: 4rem 0;
    }
    .form-control {
      border: 1px solid var(--accent-gold);
      border-radius: var(--radius-input);
      background: white;
    }
    .form-control:focus {
      border-color: var(--accent-bright);
      box-shadow: 0 0 0 0.2rem rgba(212, 175, 55, 0.25);
    }

    /* 页脚 */
    .footer {
      background: #1A3C34;
      color: #D4D0C8;
    }
    .footer a {
      color: #D4D0C8;
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--accent-bright);
    }

    button, .btn {
      transition: all 0.2s ease;
    }