/* roulang page: index */
:root {
      --primary: #1A5F7A;
      --accent1: #FF6B35;
      --accent2: #2EC4B6;
      --bg: #F8FAFB;
      --card-bg: #FFFFFF;
      --text-dark: #2C3E50;
      --text-light: #64748B;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(26,95,122,0.12);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
      scroll-behavior: smooth;
    }
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-dark);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 杂志频道双行导航 */
    .brand-bar {
      background: #fff;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      border-bottom: 1px solid #e9edf2;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
    }
    .logo-area img {
      height: 36px;
      width: auto;
    }
    .channel-bar {
      background: #F1F5F9;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 32px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      overflow-x: auto;
      white-space: nowrap;
      padding: 0 16px;
    }
    .channel-bar a {
      position: relative;
      padding: 4px 0;
      color: var(--text-dark);
      transition: color 0.2s;
    }
    .channel-bar a:hover,
    .channel-bar a.active {
      color: var(--primary);
    }
    .channel-bar a.active::after {
      content: '';
      position: absolute;
      bottom: -3px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary);
      border-radius: 2px;
    }
    .btn-cta-sm {
      background: var(--accent1);
      color: white;
      padding: 8px 18px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
    }
    .btn-cta-sm:hover {
      background: #E55A2B;
      transform: scale(1.03);
      color: white;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .channel-bar {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: var(--shadow-card);
        gap: 0;
        z-index: 50;
      }
      .channel-bar.open {
        display: flex;
      }
      .channel-bar a {
        padding: 14px 20px;
        border-bottom: 1px solid #eee;
        width: 100%;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .brand-bar {
        padding: 0 20px;
      }
    }
    /* Hero */
    #hero {
      min-height: 100vh;
      background: linear-gradient(135deg, rgba(26,95,122,0.85) 0%, rgba(26,95,122,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 650px;
      padding: 40px 0;
    }
    .hero h1 {
      font-size: 42px;
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .hero .subtitle {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 28px;
      max-width: 560px;
    }
    .badge-group {
      display: flex;
      gap: 16px;
      margin-bottom: 32px;
      flex-wrap: wrap;
    }
    .badge {
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(4px);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 500;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent1);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: #E55A2B;
      transform: scale(1.03);
      color: white;
    }
    .btn-outline {
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      background: transparent;
      transition: 0.2s;
      display: inline-block;
    }
    .btn-outline:hover {
      background: white;
      color: var(--primary);
    }
    @media (max-width: 640px) {
      .hero h1 { font-size: 32px; }
      .badge-group { flex-direction: column; gap: 8px; }
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 40px;
      text-align: center;
      color: var(--text-dark);
    }
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
      text-align: center;
    }
    .stat-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .stat-icon {
      font-size: 28px;
      color: var(--accent2);
      margin-bottom: 12px;
    }
    .stat-number {
      font-size: 42px;
      font-weight: 800;
      color: var(--accent1);
      line-height: 1.2;
    }
    .stat-label {
      color: var(--text-light);
      font-size: 14px;
      margin-top: 8px;
    }
    .sparkline-placeholder {
      height: 32px;
      background: url('/assets/images/backpic/sparkline-placeholder.png') no-repeat center;
      background-size: contain;
      margin-top: 12px;
    }
    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
      .dashboard-grid { grid-template-columns: 1fr; }
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .service-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      transition: transform 0.3s;
    }
    .service-card:hover .service-img {
      transform: scale(1.03);
    }
    .service-body {
      padding: 20px;
    }
    .service-body h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .service-body p {
      color: var(--text-light);
      font-size: 14px;
      line-height: 1.5;
    }
    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 14px;
    }
    .tag {
      background: rgba(46,196,182,0.15);
      color: var(--primary);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: var(--radius-tag);
      font-weight: 500;
    }
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
      .services-grid { grid-template-columns: 1fr; }
    }
    /* 案例对比 */
    .compare-row {
      display: flex;
      gap: 32px;
      align-items: center;
      justify-content: center;
    }
    .compare-card {
      flex: 1;
      padding: 32px;
      border-radius: var(--radius-card);
    }
    .compare-left {
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
    }
    .compare-right {
      background: white;
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-card);
    }
    .vs-divider {
      font-weight: 800;
      font-size: 24px;
      color: var(--accent1);
    }
    .compare-list {
      list-style: none;
      padding: 0;
      margin: 20px 0 0;
    }
    .compare-list li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .result-strip {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin-top: 40px;
      flex-wrap: wrap;
    }
    .result-item {
      text-align: center;
    }
    .result-number {
      font-size: 36px;
      font-weight: 800;
      color: var(--accent1);
    }
    @media (max-width: 768px) {
      .compare-row { flex-direction: column; }
      .vs-divider { transform: rotate(90deg); }
    }
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .accordion-item {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      margin-bottom: 12px;
    }
    .accordion-title {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--primary);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #f8fafc;
      padding: 0 24px;
    }
    .accordion-content.open {
      max-height: 200px;
      padding: 16px 24px;
    }
    @media (max-width: 640px) {
      .faq-grid { grid-template-columns: 1fr; }
    }
    /* CTA表单 */
    #contact {
      background: var(--primary);
      color: white;
      padding: 64px 0;
    }
    .contact-wrapper {
      display: flex;
      align-items: center;
      gap: 48px;
      flex-wrap: wrap;
    }
    .contact-text {
      flex: 1;
    }
    .contact-form {
      flex: 1;
      background: white;
      padding: 32px;
      border-radius: var(--radius-card);
      color: var(--text-dark);
    }
    .contact-form input, .contact-form textarea {
      width: 100%;
      padding: 12px;
      margin-bottom: 16px;
      border: 1px solid #ddd;
      border-radius: 6px;
      font-family: inherit;
    }
    .btn-submit {
      background: var(--accent1);
      color: white;
      border: none;
      padding: 14px;
      width: 100%;
      border-radius: var(--radius-btn);
      font-weight: 700;
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-submit:hover { background: #E55A2B; }
    .trust-badges {
      display: flex;
      gap: 20px;
      margin-top: 16px;
      font-size: 13px;
      color: var(--text-light);
    }
    /* 页脚 */
    footer {
      background: #2C3E50;
      color: #ccc;
      padding: 48px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer-links a {
      display: block;
      color: #aaa;
      margin-bottom: 8px;
    }
    .copyright {
      text-align: center;
      margin-top: 32px;
      border-top: 1px solid #444;
      padding-top: 20px;
      font-size: 14px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .contact-wrapper { flex-direction: column; }
    }