/* roulang page: index */
:root {
      --primary: #1E3A5F;
      --primary-dark: #12243C;
      --primary-light: #2C5282;
      --accent: #00A887;
      --accent-hover: #008F73;
      --accent-soft: rgba(0, 168, 135, 0.1);
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --text-dark: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --radius: 8px;
      --radius-sm: 6px;
      --shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 24px -4px rgba(15, 23, 42, 0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 15px;
      line-height: 1.6;
      color: var(--text-body);
      background-color: var(--bg-white);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部微通栏 */
    .top-bar {
      background-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-tags span {
      margin-right: 18px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .top-bar-contact {
      color: #E2E8F0;
      font-weight: 500;
    }

    /* 吸顶主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
      transition: var(--transition);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      background: var(--primary);
      color: #fff;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.5px;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 6px 0;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--accent);
    }
    .nav-menu a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 14px rgba(0, 168, 135, 0.35);
    }
    .btn-outline {
      border-color: #CBD5E1;
      color: var(--text-dark);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--primary);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 52px;
    }
    .section-kicker {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      background: var(--accent-soft);
      padding: 4px 12px;
      border-radius: 99px;
    }
    .section-title {
      font-size: 32px;
      line-height: 1.3;
      color: var(--text-dark);
      font-weight: 700;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. 首屏 Hero 促销主视觉 */
    .hero-section {
      position: relative;
      background-color: #0B192C;
      background-image: linear-gradient(135deg, rgba(11, 25, 44, 0.95), rgba(30, 58, 95, 0.88)), url('/assets/images/ca47ca47769d9640.jpg');
      background-size: cover;
      background-position: center;
      color: #FFFFFF;
      padding: 90px 0 110px;
      overflow: hidden;
    }
    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      background: #EF4444;
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
      box-shadow: 0 0 16px rgba(239, 68, 68, 0.4);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      color: #FFFFFF;
      letter-spacing: -0.5px;
    }
    .hero-content p {
      font-size: 16px;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 32px;
      max-width: 620px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-metrics-pill {
      display: flex;
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
    }
    .metric-item {
      display: flex;
      flex-direction: column;
    }
    .metric-item strong {
      font-size: 20px;
      color: #FFFFFF;
      font-weight: 700;
    }
    .metric-item span {
      font-size: 12px;
      color: #94A3B8;
    }
    .hero-card-preview {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius);
      padding: 24px;
      backdrop-filter: blur(12px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    .radar-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .radar-status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      color: var(--accent);
      background: rgba(0, 168, 135, 0.15);
      padding: 3px 8px;
      border-radius: 4px;
    }
    .radar-item {
      background: rgba(15, 23, 42, 0.6);
      border-radius: 6px;
      padding: 12px;
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    .radar-tag {
      color: #F87171;
      font-weight: 600;
      background: rgba(239, 68, 68, 0.1);
      padding: 2px 6px;
      border-radius: 4px;
    }

    /* 2. 深度体系解析 */
    .system-deep {
      background: #FFFFFF;
    }
    .deep-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .deep-media {
      position: relative;
    }
    .deep-media img {
      border-radius: var(--radius);
      box-shadow: var(--shadow-hover);
      border: 1px solid var(--border-color);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .deep-spec-pill {
      position: absolute;
      bottom: -16px;
      right: 20px;
      background: var(--primary);
      color: #fff;
      padding: 12px 20px;
      border-radius: var(--radius-sm);
      box-shadow: 0 10px 20px rgba(15, 23, 42, 0.2);
      font-size: 13px;
    }
    .deep-spec-pill strong {
      display: block;
      font-size: 18px;
      color: var(--accent);
    }
    .deep-list {
      list-style: none;
      margin-top: 24px;
    }
    .deep-list li {
      margin-bottom: 16px;
      padding-left: 28px;
      position: relative;
      font-size: 15px;
      color: var(--text-body);
    }
    .deep-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--accent);
      font-weight: bold;
      font-size: 16px;
    }

    /* 3. 核心优势 6 卡片网格 */
    .features-section {
      background: var(--bg-light);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow);
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 168, 135, 0.4);
    }
    .feature-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: var(--accent-soft);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 18px;
    }
    .feature-card h3 {
      font-size: 18px;
      color: var(--text-dark);
      margin-bottom: 10px;
      font-weight: 700;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 产品选型方案 (3列对比) */
    .solutions-section {
      background: #FFFFFF;
    }
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }
    .pricing-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .pricing-card.popular {
      border-color: var(--accent);
      box-shadow: 0 16px 32px -8px rgba(0, 168, 135, 0.2);
      transform: scale(1.02);
    }
    .popular-flag {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 10px;
      border-radius: 4px;
    }
    .pricing-card h3 {
      font-size: 20px;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .pricing-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .pricing-scope {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 24px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .pricing-features {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .pricing-features li {
      font-size: 14px;
      color: var(--text-body);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pricing-features li::before {
      content: "•";
      color: var(--accent);
      font-size: 20px;
      line-height: 0;
    }

    /* 5. 深色案例与风控理念区 */
    .dark-defense {
      background: var(--bg-dark);
      color: #FFFFFF;
    }
    .defense-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .defense-text h2 {
      font-size: 30px;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .defense-text p {
      color: #94A3B8;
      font-size: 15px;
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .defense-matrix {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .defense-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      padding: 18px;
      border-radius: var(--radius-sm);
    }
    .defense-box h4 {
      color: var(--accent);
      font-size: 15px;
      margin-bottom: 6px;
    }
    .defense-box span {
      font-size: 13px;
      color: #CBD5E1;
    }
    .defense-cases-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-dark);
      padding: 28px;
      border-radius: var(--radius);
    }
    .case-timeline-item {
      border-left: 2px solid var(--accent);
      padding-left: 18px;
      position: relative;
      margin-bottom: 20px;
    }
    .case-timeline-item:last-child {
      margin-bottom: 0;
    }
    .case-timeline-item strong {
      display: block;
      color: #FFFFFF;
      font-size: 14px;
      margin-bottom: 4px;
    }
    .case-timeline-item p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 6. 行业应用实战故事 */
    .case-stories {
      background: #FFFFFF;
    }
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .story-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      background: #fff;
    }
    .story-card img {
      width: 100%;
      height: 190px;
      object-fit: cover;
    }
    .story-body {
      padding: 22px;
    }
    .story-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary-light);
      background: #E2E8F0;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }
    .story-body h3 {
      font-size: 17px;
      color: var(--text-dark);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .story-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. 关键效能统计条 (Trust Bar) */
    .trust-bar-section {
      background: var(--primary);
      color: #FFFFFF;
      padding: 50px 0;
    }
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-col {
      padding: 10px;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
    }
    .stat-col:last-child {
      border-right: none;
    }
    .stat-num {
      font-size: 38px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
    }
    .stat-label {
      font-size: 14px;
      color: #CBD5E1;
    }

    /* 8. 标杆客户口碑 */
    .testimonial-section {
      background: var(--bg-light);
    }
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 12px;
      letter-spacing: 2px;
    }
    .testi-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 14px;
    }
    .author-info strong {
      display: block;
      font-size: 14px;
      color: var(--text-dark);
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 9. 行业洞察与要闻 */
    .insights-section {
      background: #FFFFFF;
    }
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      background: #FFFFFF;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }
    .news-card h3 {
      font-size: 16px;
      color: var(--text-dark);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 10. FAQ 手风琴 */
    .faq-section {
      background: var(--bg-light);
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-summary {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-summary::marker,
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary span.arrow {
      color: var(--accent);
      font-size: 18px;
      transition: transform 0.25s ease;
    }
    .faq-item[open] .faq-summary span.arrow {
      transform: rotate(180deg);
    }
    .faq-body {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* 11. 服务保障徽章条 */
    .guarantee-bar {
      background: #FFFFFF;
      padding: 40px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .guarantee-icon {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--accent-soft);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 15px;
      color: var(--text-dark);
      margin-bottom: 2px;
    }
    .guarantee-text p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 12. 底部转化区 */
    .cta-banner-section {
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 58, 95, 0.92)), url('/assets/images/85c3d782c3f2f387.jpg');
      background-size: cover;
      background-position: center;
      color: #FFFFFF;
      text-align: center;
      padding: 70px 0;
    }
    .cta-box-inner {
      max-width: 680px;
      margin: 0 auto;
    }
    .cta-box-inner h2 {
      font-size: 32px;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .cta-box-inner p {
      font-size: 15px;
      color: #CBD5E1;
      margin-bottom: 28px;
    }
    .cta-form {
      display: flex;
      gap: 10px;
      justify-content: center;
      max-width: 520px;
      margin: 0 auto;
    }
    .cta-form input {
      flex-grow: 1;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.95);
      font-size: 14px;
      outline: none;
      color: var(--text-dark);
    }
    .cta-form input:focus {
      border-color: var(--accent);
    }

    /* 页脚 */
    .site-footer {
      background: var(--bg-dark);
      color: #94A3B8;
      padding: 60px 0 24px;
      font-size: 13px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 15px;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 8px;
    }
    .footer-col ul li a:hover {
      color: var(--accent);
    }
    .footer-about p {
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #CBD5E1;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .deep-grid,
      .defense-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .features-grid,
      .pricing-grid,
      .stories-grid,
      .testimonial-grid,
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .stat-col:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        display: none;
        gap: 18px;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .features-grid,
      .pricing-grid,
      .stories-grid,
      .testimonial-grid,
      .insights-grid,
      .stats-row,
      .guarantee-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .stat-col {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 16px;
      }
      .cta-form {
        flex-direction: column;
      }
      .cta-form button {
        width: 100%;
      }
    }