/* roulang page: index */
:root {
      --primary: #0B2B26;
      --primary-gradient: #061E1A;
      --accent: #E6B422;
      --accent-hover: #C99F1A;
      --bg-light: #F8F9FA;
      --white: #FFFFFF;
      --text-main: #1E2B2F;
      --text-muted: #5F6B7A;
      --border-light: #DDE1E6;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition-smooth: 0.25s ease;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏卡片化面板 */
    .nav-panel {
      background: var(--white);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      border-radius: 0;
      position: sticky;
      top: 0;
      z-index: 40;
      padding: 0 20px;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      height: 70px;
    }
    .logo {
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 1px;
      color: var(--primary);
      display: flex;
      align-items: center;
    }
    .logo i {
      color: var(--accent);
      margin-right: 8px;
      font-size: 1.8rem;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
      position: relative;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      border-bottom-color: var(--accent);
    }
    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: background 0.25s, transform 0.2s, box-shadow 0.2s;
      cursor: pointer;
      font-size: 0.95rem;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.02);
      box-shadow: 0 4px 12px rgba(230,180,34,0.3);
      color: var(--primary);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-secondary:hover {
      background: rgba(11,43,38,0.1);
      border-color: var(--primary);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary);
    }

    /* Hero */
    .hero-section {
      padding: 60px 0 80px;
      background: var(--white);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 400px;
    }
    .hero-text h1 {
      font-size: 42px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 20px;
      position: relative;
    }
    .hero-text h1::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background: var(--accent);
      margin-top: 16px;
      border-radius: 2px;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-image {
      flex: 1 1 360px;
      background: var(--bg-light);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .hero-image img {
      width: 100%;
      height: 320px;
      object-fit: cover;
      border-radius: var(--radius-card);
    }

    /* 通用区块 */
    .section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }

    /* 非对称优势栅格 */
    .features-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 28px;
    }
    .feature-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-smooth);
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon {
      font-size: 2.4rem;
      color: var(--accent);
      margin-bottom: 16px;
    }
    .feature-card h3 {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    /* 服务卡片横向 */
    .services-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 10px;
      scrollbar-width: thin;
    }
    .service-card {
      flex: 0 0 340px;
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all var(--transition-smooth);
      overflow: hidden;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .service-img {
      position: relative;
      height: 200px;
      overflow: hidden;
    }
    .service-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .service-img::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(180deg, rgba(11,43,38,0.2) 0%, rgba(11,43,38,0.55) 100%);
    }
    .service-content {
      padding: 20px;
      position: relative;
      z-index: 2;
    }
    .service-content h4 {
      font-weight: 700;
      color: var(--primary);
    }
    .tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin: 12px 0;
    }
    .tag {
      background: rgba(11,43,38,0.08);
      color: var(--primary);
      font-size: 0.8rem;
      padding: 4px 10px;
      border-radius: 20px;
    }

    /* 信任数据 */
    .trust-stats {
      display: flex;
      gap: 32px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .stat-item {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px 32px;
      text-align: center;
      box-shadow: var(--shadow-card);
      min-width: 160px;
    }
    .stat-number {
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* 流程步骤 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      flex-wrap: wrap;
    }
    .step {
      flex: 1 1 180px;
      text-align: center;
      position: relative;
    }
    .step-circle {
      width: 56px;
      height: 56px;
      background: var(--accent);
      color: var(--primary);
      border-radius: 50%;
      font-weight: 700;
      font-size: 1.5rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    /* FAQ */
    .accordion-title {
      font-weight: 600;
      background: var(--white);
      border-left: 4px solid transparent;
      transition: 0.2s;
    }
    .accordion-item.is-active .accordion-title {
      border-left-color: var(--accent);
      background: #f4f6f8;
    }

    /* CTA 深色块 */
    .cta-block {
      background: var(--primary-gradient);
      color: white;
      border-radius: var(--radius-card);
      padding: 64px 32px;
      text-align: center;
    }

    /* 页脚 */
    .footer {
      background: var(--primary);
      color: #B0BEC5;
      padding: 48px 0 24px;
    }
    .footer a:hover {
      color: var(--accent);
    }
    .social-icons i {
      font-size: 1.4rem;
      margin-right: 16px;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .hero-text h1 { font-size: 32px; }
      .section-title { font-size: 28px; }
      .features-grid {
        grid-template-columns: 1fr;
      }
    }