/* roulang page: index */
:root {
      --primary: #C9A96E;
      --primary-dark: #B8944F;
      --accent: #D4AF37;
      --bg-deep: #1A1A2E;
      --bg-card: #2D2D3A;
      --bg-light: #F5F0E8;
      --text-light: #E0E0E0;
      --text-dark: #333333;
      --text-muted: #A0A0B0;
      --white: #FFFFFF;
      --radius: 8px;
      --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
      --shadow-light: 0 2px 12px rgba(0, 0, 0, 0.08);
      --transition: all 0.3s ease;
      --font-serif: Georgia, 'Times New Roman', serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-light);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button, .btn {
      font-family: inherit;
    }

    .container-custom {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 吸顶导航 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      background: transparent;
      transition: background 0.4s ease, backdrop-filter 0.4s ease;
      padding: 0;
    }

    .navbar-custom.scrolled {
      background: rgba(26, 26, 46, 0.92);
      backdrop-filter: blur(8px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }

    .top-brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 1.5rem;
      border-bottom: 1px solid rgba(201, 169, 110, 0.25);
      flex-wrap: wrap;
      gap: 1rem;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 2px;
      line-height: 1.2;
      text-shadow: 0 2px 10px rgba(212, 175, 55, 0.3);
    }

    .hot-tags {
      display: flex;
      align-items: center;
      gap: 1.2rem;
      flex-wrap: wrap;
    }

    .hot-tags span {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .hot-tags a {
      color: var(--primary);
      font-size: 0.9rem;
      font-weight: 500;
      border-bottom: 1px dashed transparent;
    }

    .hot-tags a:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .search-icon {
      color: var(--primary);
      font-size: 1.3rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .search-icon:hover {
      color: var(--accent);
    }

    .channel-bar {
      display: flex;
      align-items: center;
      gap: 2rem;
      padding: 0.7rem 1.5rem;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
      scrollbar-color: var(--primary) transparent;
    }

    .channel-bar a {
      color: var(--text-light);
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
    }

    .channel-bar a:hover,
    .channel-bar a.active {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }

    /* 移动端汉堡菜单 */
    .navbar-toggler-custom {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      font-size: 1.5rem;
      padding: 0.3rem 0.7rem;
      border-radius: 4px;
      display: none;
    }

    @media (max-width: 768px) {
      .top-brand-row {
        flex-direction: column;
        align-items: flex-start;
      }
      .channel-bar {
        display: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        background: rgba(26,26,46,0.95);
        padding: 1rem;
      }
      .channel-bar.show {
        display: flex;
      }
      .navbar-toggler-custom {
        display: block;
      }
    }

    /* Hero */
    .hero-section {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(26,26,46,0.7) 0%, rgba(0,0,0,0.85) 90%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }

    .hero-content h1 {
      font-size: 3.8rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--white);
      margin-bottom: 1.5rem;
      text-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }

    .hero-content .subtitle {
      font-size: 1.3rem;
      color: var(--text-light);
      margin-bottom: 2.5rem;
      max-width: 550px;
      opacity: 0.9;
    }

    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: var(--bg-deep);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: 6px;
      font-size: 1.1rem;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }

    .btn-primary-custom:hover {
      background: var(--accent);
      color: #1A1A2E;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(212,175,55,0.4);
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 30px;
      border-radius: 6px;
      font-size: 1.1rem;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }

    .btn-outline-custom:hover {
      background: rgba(201,169,110,0.12);
      color: var(--accent);
      border-color: var(--accent);
      transform: translateY(-2px);
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2.5rem;
      }
      .hero-content .subtitle {
        font-size: 1rem;
      }
    }

    /* 通用板块 */
    .section-padding {
      padding: 5rem 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 1rem;
      text-align: center;
    }

    .section-subtitle {
      color: var(--text-muted);
      text-align: center;
      max-width: 600px;
      margin: 0 auto 3rem;
    }

    /* 服务卡片 */
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 12px 30px rgba(0,0,0,0.5);
      border: 1px solid var(--accent);
    }

    .service-card img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }

    .service-card .card-body {
      padding: 1.8rem;
      display: flex;
      flex-direction: column;
      flex: 1;
      background: var(--bg-card);
    }

    .service-card h3 {
      color: var(--primary);
      font-weight: 600;
      font-size: 1.6rem;
      margin-bottom: 0.8rem;
    }

    .service-card p {
      color: var(--text-light);
      flex: 1;
    }

    .arrow-link {
      color: var(--accent);
      font-weight: 600;
      margin-top: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
    }

    /* 数据优势 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      text-align: center;
    }

    .stat-item {
      background: var(--bg-card);
      padding: 2rem 1rem;
      border-radius: var(--radius);
      transition: var(--transition);
    }

    .stat-item:hover {
      background: #3A3A4A;
    }

    .stat-number {
      font-family: var(--font-serif);
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 0.4rem;
    }

    .stat-label {
      color: var(--text-muted);
      font-size: 1rem;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    /* 案例展示 */
    .case-row {
      display: flex;
      gap: 2rem;
      align-items: center;
      margin-bottom: 3rem;
    }

    .case-img {
      flex: 1.2;
      border-radius: var(--radius);
      overflow: hidden;
    }

    .case-text {
      flex: 1;
    }

    .case-text h3 {
      color: var(--primary);
      font-size: 1.8rem;
    }

    .badge-gold {
      background: rgba(212,175,55,0.2);
      color: var(--accent);
      border-radius: 20px;
      padding: 0.25rem 1rem;
      font-size: 0.8rem;
      margin-right: 0.5rem;
    }

    @media (max-width: 768px) {
      .case-row {
        flex-direction: column;
      }
    }

    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: relative;
    }

    .step {
      text-align: center;
      z-index: 2;
      background: var(--bg-deep);
      padding: 0 1rem;
    }

    .step-icon {
      background: var(--primary);
      color: #1A1A2E;
      width: 70px;
      height: 70px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      font-weight: 700;
      margin: 0 auto 1rem;
    }

    .connector {
      position: absolute;
      top: 35px;
      left: 15%;
      right: 15%;
      height: 2px;
      background: linear-gradient(to right, var(--primary), var(--accent));
      z-index: 1;
    }

    @media (max-width: 768px) {
      .process-steps {
        flex-direction: column;
        gap: 2rem;
      }
      .connector {
        display: none;
      }
    }

    /* FAQ */
    .accordion-faq .accordion-button {
      background: var(--bg-card);
      color: var(--text-light);
      font-weight: 600;
      box-shadow: none;
      border: none;
      padding: 1.2rem 1.5rem;
      border-radius: var(--radius);
    }

    .accordion-faq .accordion-button:not(.collapsed) {
      background: #3A3A4A;
      color: var(--accent);
    }

    .accordion-faq .accordion-body {
      background: #252535;
      color: var(--text-light);
      border-radius: 0 0 var(--radius) var(--radius);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--bg-deep);
      background-image: radial-gradient(circle at 20% 30%, #2D2D3A, #1A1A2E);
    }

    /* 页脚 */
    .footer-custom {
      background: #0F0F1A;
      color: var(--text-muted);
    }

    .footer-links a {
      color: var(--primary);
      display: block;
      margin-bottom: 0.4rem;
    }

    .footer-links a:hover {
      color: var(--accent);
      text-decoration: underline;
    }

    .social-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 1px solid var(--accent);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      margin-right: 0.5rem;
      transition: var(--transition);
    }

    .social-icon:hover {
      background: var(--accent);
      color: #1A1A2E;
    }