/* roulang page: index */
:root {
      --primary: #0F172A;
      --primary-light: #1E293B;
      --accent-sky: #0EA5E9;
      --accent-emerald: #10B981;
      --accent-amber: #F59E0B;
      --bg-slate: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-subtle: #F1F5F9;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
    }

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

    body {
      font-family: var(--font-family);
      background-color: var(--bg-slate);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部信息条 */
    .top-bar {
      background: #0B1120;
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .top-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background: var(--accent-emerald);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-emerald);
    }
    .top-links {
      display: flex;
      gap: 20px;
    }
    .top-links a:hover {
      color: var(--accent-sky);
    }

    /* 主导航 */
    .header-main {
      background: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-badge {
      background: var(--primary);
      color: #fff;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 1px;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-item {
      font-size: 15px;
      font-weight: 500;
      color: #334155;
    }
    .nav-item:hover, .nav-item.active {
      color: var(--accent-sky);
    }
    .btn-apply-nav {
      background: var(--primary);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }
    .btn-apply-nav:hover {
      background: #1e293b;
      box-shadow: var(--shadow-md);
      transform: translateY(-1px);
    }

    /* 斜切色块 Hero */
    .hero-angled-section {
      position: relative;
      background: #0B1120;
      color: #FFFFFF;
      overflow: hidden;
      padding: 100px 0 160px;
    }
    .hero-angled-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/77c84633592e5390.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
      mix-blend-mode: luminosity;
    }
    .hero-cut-polygon {
      position: absolute;
      bottom: -1px;
      left: 0;
      right: 0;
      height: 90px;
      background: var(--bg-slate);
      clip-path: polygon(0 100%, 100% 100%, 100% 0);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 860px;
    }
    .hero-badge-tag {
      display: inline-block;
      background: rgba(14, 165, 233, 0.15);
      border: 1px solid rgba(14, 165, 233, 0.4);
      color: var(--accent-sky);
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 20px;
      text-transform: uppercase;
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }
    .hero-desc {
      font-size: 17px;
      line-height: 1.7;
      color: #94A3B8;
      margin-bottom: 36px;
      max-width: 760px;
    }
    .btn-cta-hero {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: var(--accent-sky);
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
    }
    .btn-cta-hero:hover {
      background: #0284C7;
      transform: translateY(-2px);
    }

    /* 通用Section */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-sub-label {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent-sky);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      display: block;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-summary {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块2: 指标看板 (#metrics) */
    .metrics-section {
      background: var(--bg-slate);
      margin-top: -40px;
      z-index: 10;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .metric-card:hover {
      border-color: #CBD5E1;
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }
    .metric-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 14px;
    }
    .metric-name {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }
    .metric-badge {
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 600;
    }
    .badge-rise { background: #ECFDF5; color: var(--accent-emerald); }
    .badge-warn { background: #FFFBEB; color: var(--accent-amber); }
    .badge-flat { background: #F1F5F9; color: #475569; }
    .metric-val {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .metric-detail {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块3: 平台品牌与架构介绍 (#platform-intro) */
    .intro-section {
      background: var(--bg-white);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .intro-img-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .intro-feature-list {
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .feature-point {
      background: var(--bg-subtle);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .feature-point h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .feature-point p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块4: 核心优势矩阵 (#advantages) */
    .advantages-section {
      background: var(--bg-slate);
    }
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.25s ease;
    }
    .adv-card:hover {
      border-color: var(--accent-sky);
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }
    .adv-card-num {
      font-size: 14px;
      font-weight: 800;
      color: var(--accent-sky);
      margin-bottom: 12px;
    }
    .adv-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .adv-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块5: 热门产品套件 (#products) */
    .products-section {
      background: var(--bg-white);
      border-top: 1px solid var(--border-color);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: var(--bg-white);
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }
    .product-media {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .product-body {
      padding: 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-tag {
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-sky);
      margin-bottom: 8px;
      text-transform: uppercase;
    }
    .product-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .product-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .product-items {
      list-style: none;
      margin-bottom: 24px;
      flex: 1;
    }
    .product-items li {
      font-size: 13px;
      color: #334155;
      padding: 6px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-items li::before {
      content: "▪";
      color: var(--accent-emerald);
    }
    .product-btn {
      text-align: center;
      padding: 10px 0;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: var(--bg-slate);
    }
    .product-btn:hover {
      background: var(--primary);
      color: #fff;
    }

    /* 板块6: 深色实证案例 (#dark-cases) */
    .dark-cases-section {
      background: var(--primary);
      color: #FFFFFF;
      padding: 90px 0;
    }
    .dark-cases-section .section-title {
      color: #FFFFFF;
    }
    .dark-cases-section .section-summary {
      color: #94A3B8;
    }
    .dark-case-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .case-card-deep {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 36px;
    }
    .case-metric-row {
      display: flex;
      gap: 30px;
      margin: 24px 0;
      padding: 16px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .case-metric-item h5 {
      font-size: 26px;
      color: var(--accent-emerald);
      font-weight: 800;
    }
    .case-metric-item span {
      font-size: 12px;
      color: #94A3B8;
    }

    /* 板块7: 深度实战故事 (#stories) */
    .stories-section {
      background: var(--bg-slate);
    }
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .story-tag {
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-sky);
      background: #E0F2FE;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 14px;
    }
    .story-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .story-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .story-quote {
      font-size: 13px;
      color: #334155;
      font-style: italic;
      border-left: 3px solid var(--accent-sky);
      padding-left: 14px;
    }

    /* 板块8: 关键数据条 (#stats-bar) */
    .stats-bar-section {
      background: #0284C7;
      color: #FFFFFF;
      padding: 50px 0;
    }
    .stats-flex {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-number {
      font-size: 38px;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 13px;
      color: #E0F2FE;
      font-weight: 500;
    }

    /* 板块9: 客户评价 (#testimonials) */
    .testimonials-section {
      background: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: var(--bg-slate);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-text {
      font-size: 13px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #E2E8F0;
      padding-top: 16px;
    }
    .testi-avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #CBD5E1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #475569;
      font-size: 14px;
    }
    .testi-meta h5 {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
    }
    .testi-meta span {
      font-size: 11px;
      color: var(--text-muted);
    }

    /* 板块10: 行业研报动态 (#news) */
    .news-section {
      background: var(--bg-slate);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.25s ease;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .news-date {
      font-size: 11px;
      font-weight: 600;
      color: var(--accent-sky);
      margin-bottom: 8px;
    }
    .news-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块11: 安全与合规 (#security-guarantee) */
    .security-section {
      background: var(--bg-white);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .security-box {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 24px;
      text-align: center;
      background: var(--bg-slate);
    }
    .security-icon {
      font-size: 24px;
      color: var(--accent-emerald);
      margin-bottom: 12px;
      font-weight: 800;
    }
    .security-box h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .security-box p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块12: 常见疑问 (#faq) */
    .faq-section {
      background: var(--bg-slate);
    }
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      padding: 22px 26px;
    }
    .faq-quest {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .faq-ans {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块13: 转化转化区 (#convert-cta) */
    .convert-cta-section {
      background: #0B1120;
      color: #FFFFFF;
      padding: 90px 0;
    }
    .convert-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .convert-info h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .convert-info p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .convert-form {
      background: var(--bg-white);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      color: var(--primary);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 12px;
      font-weight: 600;
      color: #475569;
      margin-bottom: 6px;
    }
    .form-group input, .form-group select {
      width: 100%;
      height: 42px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 0 12px;
      font-size: 13px;
      font-family: inherit;
    }
    .form-group input:focus, .form-group select:focus {
      outline: none;
      border-color: var(--accent-sky);
    }
    .btn-submit-form {
      width: 100%;
      height: 46px;
      background: var(--accent-sky);
      color: #fff;
      font-size: 14px;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      margin-top: 8px;
    }
    .btn-submit-form:hover {
      background: #0284C7;
    }

    /* 页脚 */
    .site-footer {
      background: #060911;
      color: #94A3B8;
      font-size: 13px;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 50px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 18px;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.65;
      max-width: 380px;
    }
    .footer-col h5 {
      font-size: 14px;
      color: #FFFFFF;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 8px;
    }
    .footer-col ul a:hover {
      color: var(--accent-sky);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
    }

    /* 移动端适配 */
    @media (max-width: 1024px) {
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .advantages-grid { grid-template-columns: repeat(2, 1fr); }
      .products-grid { grid-template-columns: 1fr; }
      .dark-case-grid { grid-template-columns: 1fr; }
      .security-grid { grid-template-columns: repeat(2, 1fr); }
      .convert-grid { grid-template-columns: 1fr; }
      .stats-flex { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .header-inner { height: 60px; }
      .main-nav { display: none; }
      .hero-title { font-size: 30px; }
      .hero-desc { font-size: 14px; }
      .metrics-grid { grid-template-columns: 1fr; }
      .intro-grid { grid-template-columns: 1fr; }
      .advantages-grid { grid-template-columns: 1fr; }
      .story-grid { grid-template-columns: 1fr; }
      .testi-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .security-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }