/* roulang page: index */
:root {
      --bs-primary: #F15A24;
      --bs-primary-rgb: 241, 90, 36;
      --bs-secondary: #1E1E1E;
      --bs-light: #F9F4EF;
      --bs-dark: #1E1E1E;
      --bs-body-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --bs-border-radius: 0.5rem;
      --bs-btn-border-radius: 0.5rem;
      --bs-card-border-radius: 0.75rem;
      --lj-orange: #F15A24;
      --lj-dark: #1E1E1E;
      --lj-warm: #F9F4EF;
      --lj-gold: #F7B731;
      --lj-text: #2D2D2D;
      --lj-muted: #6B6B6B;
      --lj-white: #FFFFFF;
      --lj-border: rgba(0,0,0,0.06);
      --lj-shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --lj-shadow-md: 0 8px 30px rgba(0,0,0,0.08);
      --lj-glass: rgba(255,255,255,0.6);
      --lj-glass-solid: rgba(255,255,255,0.98);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--bs-body-font-family);
      background-color: var(--lj-warm);
      color: var(--lj-text);
      line-height: 1.8;
      margin: 0;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    a {
      color: var(--lj-text);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    a:hover {
      color: var(--lj-orange);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .lj-container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 导航 */
    .lj-navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      background: var(--lj-glass);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--lj-border);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      transition: background 0.25s ease, backdrop-filter 0.25s ease, box-shadow 0.25s ease;
    }
    .lj-navbar.scrolled {
      background: var(--lj-glass-solid);
      backdrop-filter: none;
      -webkit-backdrop-filter: none;
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }
    .lj-nav-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .lj-logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--lj-dark);
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .lj-logo span {
      color: var(--lj-orange);
    }
    .lj-nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .lj-nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--lj-text);
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    .lj-nav-links a:hover,
    .lj-nav-links a.active {
      color: var(--lj-orange);
      border-bottom-color: var(--lj-orange);
    }
    .lj-btn-outline-sm {
      background: var(--lj-orange);
      color: white !important;
      padding: 8px 18px;
      border-radius: 6px;
      font-weight: 500;
      font-size: 0.9rem;
      border: none;
      transition: background 0.2s;
      white-space: nowrap;
    }
    .lj-btn-outline-sm:hover {
      background: #D94A1A;
      color: white !important;
    }
    .navbar-toggler {
      border: none;
      color: var(--lj-dark);
      font-size: 1.5rem;
      background: transparent;
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }
    @media (max-width: 992px) {
      .lj-nav-links {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px 30px;
        gap: 1.2rem;
        box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        display: none;
        border-bottom: 1px solid #eee;
      }
      .lj-nav-links.show {
        display: flex;
      }
      .lj-nav-links a {
        font-size: 1rem;
      }
    }
    /* 区块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: var(--lj-dark);
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--lj-muted);
      margin-bottom: 2.5rem;
    }
    /* Hero */
    .lj-hero {
      padding-top: 140px;
      padding-bottom: 80px;
      background: linear-gradient(135deg, #ffffff 0%, #fdf9f5 100%);
      display: flex;
      align-items: center;
    }
    .lj-hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .lj-hero-text {
      flex: 1;
    }
    .lj-hero-text h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.3;
      color: var(--lj-dark);
    }
    .lj-hero-text .highlight {
      color: var(--lj-orange);
    }
    .lj-hero-desc {
      color: var(--lj-muted);
      font-size: 1.1rem;
      max-width: 480px;
      margin: 1.2rem 0 2rem;
    }
    .lj-hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .lj-btn-primary {
      background: var(--lj-orange);
      border: none;
      color: white;
      padding: 12px 28px;
      border-radius: 8px;
      font-weight: 600;
      transition: background 0.2s, transform 0.2s;
    }
    .lj-btn-primary:hover {
      background: #D94A1A;
      color: white;
    }
    .lj-btn-secondary {
      background: transparent;
      border: 1.5px solid var(--lj-orange);
      color: var(--lj-orange);
      padding: 12px 28px;
      border-radius: 8px;
      font-weight: 600;
      transition: all 0.2s;
    }
    .lj-btn-secondary:hover {
      background: var(--lj-orange);
      color: white;
    }
    .lj-hero-image {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .lj-hero-image img {
      border-radius: 20px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.08);
      max-height: 380px;
      object-fit: cover;
    }
    @media (max-width: 992px) {
      .lj-hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .lj-hero-text h1 {
        font-size: 2.2rem;
      }
      .lj-hero-desc {
        margin-left: auto;
        margin-right: auto;
      }
      .lj-hero-buttons {
        justify-content: center;
      }
    }
    /* 卡片 */
    .lj-card {
      background: white;
      border-radius: 12px;
      padding: 2rem 1.5rem;
      box-shadow: var(--lj-shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
      border: none;
    }
    .lj-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--lj-shadow-md);
    }
    .lj-icon-circle {
      width: 50px;
      height: 50px;
      background: rgba(241,90,36,0.08);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--lj-orange);
      font-size: 1.8rem;
      margin-bottom: 1.4rem;
    }
    /* 服务卡片 */
    .lj-service-card {
      background: white;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--lj-shadow-sm);
      transition: 0.25s ease;
    }
    .lj-service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--lj-shadow-md);
    }
    .lj-service-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      transition: transform 0.3s;
    }
    .lj-service-card:hover img {
      transform: scale(1.02);
    }
    /* 数据深色区 */
    .lj-data-section {
      background: var(--lj-dark);
      color: white;
      padding: 70px 0;
    }
    .lj-data-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--lj-gold);
    }
    /* 案例标签 */
    .lj-badge {
      background: #F9F4EF;
      color: var(--lj-orange);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 500;
    }
    /* 时间轴 */
    .lj-timeline {
      position: relative;
      padding-left: 30px;
    }
    .lj-timeline::before {
      content: '';
      position: absolute;
      left: 8px;
      top: 8px;
      bottom: 8px;
      width: 2px;
      background: #E0E0E0;
    }
    .lj-timeline-item {
      position: relative;
      margin-bottom: 2rem;
    }
    .lj-timeline-item::before {
      content: '';
      position: absolute;
      left: -26px;
      top: 6px;
      width: 12px;
      height: 12px;
      background: var(--lj-orange);
      border-radius: 50%;
      border: 2px solid white;
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: white;
      color: var(--lj-orange);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--lj-orange);
      box-shadow: 0 0 0 3px rgba(241,90,36,0.15);
    }
    .accordion-item {
      border: 1px solid #E8E8E8;
      border-radius: 8px;
      margin-bottom: 12px;
    }
    /* CTA */
    .lj-cta {
      background: var(--lj-warm);
      text-align: center;
    }
    .lj-btn-cta {
      background: linear-gradient(135deg, #F15A24, #F7B731);
      color: white;
      border: none;
      padding: 16px 40px;
      border-radius: 10px;
      font-weight: 700;
      font-size: 1.1rem;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .lj-btn-cta:hover {
      transform: scale(1.03);
      box-shadow: 0 10px 25px rgba(241,90,36,0.3);
      color: white;
    }
    /* Footer */
    .lj-footer {
      background: var(--lj-dark);
      color: #CCCCCC;
      padding: 50px 0 20px;
    }
    .lj-footer a {
      color: #CCCCCC;
    }
    .lj-footer a:hover {
      color: var(--lj-gold);
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .lj-hero-text h1 {
        font-size: 1.9rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }
    .form-control {
      border: 1px solid #E0E0E0;
      border-radius: 6px;
    }
    .form-control:focus {
      border-color: var(--lj-orange);
      box-shadow: 0 0 0 3px rgba(241,90,36,0.1);
    }