/* roulang page: index */
:root {
      --bg-dark: #0B0F19;
      --bg-midnight: #0F172A;
      --bg-surface: rgba(30, 41, 59, 0.65);
      --bg-surface-hover: rgba(51, 65, 85, 0.75);
      --border-glow: rgba(255, 255, 255, 0.08);
      --border-blue: rgba(37, 99, 235, 0.35);
      --color-primary: #2563EB;
      --color-primary-light: #3B82F6;
      --color-emerald: #10B981;
      --color-cyan: #06B6D4;
      --color-warning: #F59E0B;
      --color-danger: #EF4444;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --glow-shadow: 0 0 25px rgba(59, 130, 246, 0.35);
      --glow-emerald: 0 0 20px rgba(16, 185, 129, 0.3);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 15% 20%, rgba(37, 99, 235, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 65%, rgba(16, 185, 129, 0.08) 0%, transparent 45%);
      color: var(--text-main);
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* 容器体系 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部微信息条 */
    .top-bar {
      background: rgba(11, 15, 25, 0.85);
      border-bottom: 1px solid var(--border-glow);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--color-emerald);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--color-emerald);
      animation: pulseAnim 2s infinite;
    }
    @keyframes pulseAnim {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.2); }
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glow);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #FFFFFF;
    }
    .logo-symbol {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-emerald));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 20px;
      color: #FFFFFF;
      box-shadow: var(--glow-shadow);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 0;
      position: relative;
    }
    .nav-item a:hover, .nav-item a.active {
      color: #FFFFFF;
    }
    .nav-item a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--color-cyan), var(--color-emerald));
      border-radius: 2px;
    }
    .header-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--color-primary), #1D4ED8);
      color: #FFFFFF;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      box-shadow: var(--glow-shadow);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(37, 99, 235, 0.6);
      color: #FFFFFF;
    }

    /* 移动端汉堡按钮 */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* 板块通用体系 */
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background: rgba(15, 23, 42, 0.5);
    }
    .section-head {
      margin-bottom: 56px;
    }
    .section-head.center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(37, 99, 235, 0.15);
      border: 1px solid var(--border-blue);
      border-radius: 30px;
      color: var(--color-cyan);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.35;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: rgba(59, 130, 246, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
    }

    /* 蓝图要求：Hero 斜切色块首屏，大标题压在色块上 + 单 CTA */
    .hero-angled-section {
      position: relative;
      padding: 120px 0 100px;
      overflow: hidden;
      background-image: linear-gradient(to bottom, rgba(11, 15, 25, 0.8), #0B0F19), url('/assets/images/efcd076908ea8a75.jpg');
      background-size: cover;
      background-position: center;
    }
    .angled-backdrop-poly {
      position: absolute;
      top: 0;
      left: -10%;
      width: 120%;
      height: 100%;
      background: linear-gradient(115deg, rgba(37, 99, 235, 0.28) 0%, rgba(16, 185, 129, 0.15) 45%, transparent 70%);
      transform: skewY(-4.5deg);
      transform-origin: top left;
      z-index: 1;
      pointer-events: none;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-container {
      position: relative;
      z-index: 2;
      max-width: 980px;
    }
    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(6, 182, 212, 0.4);
      padding: 6px 18px;
      border-radius: 30px;
      color: #38BDF8;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
    }
    .hero-title-main {
      font-size: 52px;
      font-weight: 900;
      line-height: 1.25;
      color: #FFFFFF;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-title-main span {
      background: linear-gradient(90deg, #38BDF8, #34D399);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary-text {
      font-size: 18px;
      color: #CBD5E1;
      line-height: 1.85;
      margin-bottom: 36px;
      max-width: 860px;
    }
    .hero-cta-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 16px 40px;
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      background: linear-gradient(135deg, #0284C7, #10B981);
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.25);
      box-shadow: 0 0 28px rgba(16, 185, 129, 0.45);
      cursor: pointer;
    }
    .hero-cta-action:hover {
      transform: translateY(-3px);
      box-shadow: 0 0 40px rgba(6, 182, 212, 0.6);
      color: #FFFFFF;
    }
    .hero-stat-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 56px;
      padding-top: 36px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .stat-micro-item {
      display: flex;
      flex-direction: column;
    }
    .stat-micro-num {
      font-size: 30px;
      font-weight: 800;
      color: #FFFFFF;
      font-family: monospace;
    }
    .stat-micro-lbl {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 网格布局通用类 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    /* 适用人群板块样式 */
    .persona-card {
      background: rgba(30, 41, 59, 0.45);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }
    .persona-badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      background: rgba(16, 185, 129, 0.15);
      color: #34D399;
      margin-bottom: 14px;
    }
    .persona-card h3 {
      font-size: 20px;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .persona-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 谁适合 / 谁不适合 双栏对比卡片 */
    .compare-polar-box {
      border-radius: var(--radius-md);
      padding: 36px;
      height: 100%;
    }
    .compare-polar-fit {
      background: rgba(16, 185, 129, 0.05);
      border: 1px solid rgba(16, 185, 129, 0.25);
    }
    .compare-polar-unfit {
      background: rgba(239, 68, 68, 0.04);
      border: 1px solid rgba(239, 68, 68, 0.2);
    }
    .polar-title {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .polar-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .polar-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.6;
    }
    .polar-item strong {
      color: #FFFFFF;
    }
    .polar-bullet {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      flex-shrink: 0;
      margin-top: 3px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 900;
    }
    .fit-bullet { background: rgba(16, 185, 129, 0.2); color: #34D399; }
    .unfit-bullet { background: rgba(239, 68, 68, 0.2); color: #F87171; }

    /* 功能对比选型表（蓝图硬性要求） */
    .tier-table-wrapper {
      width: 100%;
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-glow);
      background: var(--bg-surface);
      margin-top: 30px;
    }
    .tier-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 15px;
    }
    .tier-table th, .tier-table td {
      padding: 20px 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .tier-table th {
      background: rgba(15, 23, 42, 0.9);
      color: #FFFFFF;
      font-weight: 700;
    }
    .tier-highlight-col {
      background: rgba(37, 99, 235, 0.12);
      border-left: 2px solid var(--color-primary-light);
      border-right: 2px solid var(--color-primary-light);
      position: relative;
    }
    .recommend-badge {
      display: inline-block;
      padding: 2px 8px;
      background: var(--color-primary);
      color: #FFFFFF;
      font-size: 11px;
      border-radius: 4px;
      font-weight: 700;
      margin-left: 8px;
      vertical-align: middle;
    }

    /* 业务痛点卡片 */
    .pain-card {
      background: rgba(30, 41, 59, 0.5);
      border-left: 4px solid var(--color-danger);
      padding: 28px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }
    .pain-card h4 {
      font-size: 18px;
      color: #F87171;
      margin-bottom: 10px;
    }
    .pain-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 架构图文混合区 */
    .arch-feature-box {
      display: flex;
      gap: 18px;
      margin-bottom: 24px;
    }
    .arch-icon {
      width: 44px;
      height: 44px;
      background: rgba(37, 99, 235, 0.18);
      border-radius: 10px;
      border: 1px solid var(--border-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-cyan);
      font-size: 18px;
      flex-shrink: 0;
    }
    .arch-content h4 {
      font-size: 17px;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .arch-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 矩阵产品卡片 */
    .matrix-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .matrix-card.featured {
      border-color: rgba(6, 182, 212, 0.6);
      box-shadow: 0 0 30px rgba(6, 182, 212, 0.2);
      transform: scale(1.02);
      background: linear-gradient(180deg, rgba(30, 41, 59, 0.85) 0%, rgba(15, 23, 42, 0.95) 100%);
    }

    /* 入口分流微模块 */
    .portal-route-card {
      background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: left;
      transition: var(--transition);
      display: block;
    }
    .portal-route-card:hover {
      border-color: var(--color-emerald);
      transform: translateY(-4px);
      box-shadow: var(--glow-emerald);
    }
    .portal-icon-lead {
      font-size: 26px;
      color: var(--color-emerald);
      margin-bottom: 16px;
    }

    /* 资讯列表卡片 */
    .news-master-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
    }
    .news-img-box {
      height: 240px;
      overflow: hidden;
      position: relative;
    }
    .news-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .news-master-card:hover .news-img-box img {
      transform: scale(1.06);
    }
    .news-body-content {
      padding: 24px;
    }
    .news-timestamp {
      font-size: 13px;
      color: var(--color-cyan);
      margin-bottom: 8px;
      font-family: monospace;
    }
    .news-item-compact {
      background: rgba(30, 41, 59, 0.4);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-sm);
      padding: 18px 22px;
      margin-bottom: 16px;
      transition: var(--transition);
    }
    .news-item-compact:hover {
      background: rgba(51, 65, 85, 0.5);
      border-color: rgba(255, 255, 255, 0.2);
    }

    /* 数据指标通栏 */
    .metric-counter-band {
      background: linear-gradient(90deg, rgba(37, 99, 235, 0.15) 0%, rgba(16, 185, 129, 0.15) 100%);
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 50px 0;
    }
    .metric-val {
      font-size: 42px;
      font-weight: 900;
      color: #FFFFFF;
      letter-spacing: -1px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 15px;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* 客户证言卡片 */
    .testimonial-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }
    .testimonial-quote {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .client-profile {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .client-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #FFFFFF;
    }
    .client-meta h5 {
      font-size: 15px;
      color: #FFFFFF;
    }
    .client-meta span {
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 观点解读卡片 */
    .insight-card {
      background: rgba(30, 41, 59, 0.45);
      border: 1px solid var(--border-glow);
      border-left: 3px solid var(--color-cyan);
      padding: 24px;
      border-radius: 0 var(--radius-sm) var--radius-sm) 0;
      transition: var(--transition);
    }
    .insight-card:hover {
      border-color: rgba(6, 182, 212, 0.4);
      background: rgba(30, 41, 59, 0.7);
    }
    .insight-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .insight-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 保障说明卡片 */
    .guarantee-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
    }
    .guarantee-icon {
      width: 56px;
      height: 56px;
      margin: 0 auto 18px;
      background: rgba(16, 185, 129, 0.12);
      border: 1px solid rgba(16, 185, 129, 0.3);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--color-emerald);
    }
    .guarantee-card h4 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .guarantee-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 常见问题解答 FAQ */
    .faq-accordion-group {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-sm);
      padding: 24px 28px;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-item-card:hover {
      border-color: rgba(59, 130, 246, 0.4);
    }
    .faq-question-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-toggle-sign {
      color: var(--color-cyan);
      font-size: 18px;
      font-weight: 900;
    }
    .faq-answer-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-top: 14px;
      padding-top: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    /* 底部收口行动区 */
    .cta-glow-banner {
      background: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.3) 0%, rgba(15, 23, 42, 0.95) 75%);
      border: 1px solid rgba(6, 182, 212, 0.35);
      border-radius: var(--radius-lg);
      padding: 70px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: 0 0 50px rgba(37, 99, 235, 0.2);
    }
    .cta-glow-banner h2 {
      font-size: 38px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .cta-glow-banner p {
      font-size: 16px;
      color: #CBD5E1;
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .cta-action-wrap {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .cta-input-control {
      padding: 14px 22px;
      background: rgba(11, 15, 25, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 15px;
      width: 320px;
      outline: none;
      transition: var(--transition);
    }
    .cta-input-control:focus {
      border-color: var(--color-cyan);
      box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
    }
    .cta-btn-submit {
      padding: 14px 34px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-emerald));
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: var(--glow-emerald);
      transition: var(--transition);
    }
    .cta-btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 35px rgba(16, 185, 129, 0.6);
    }

    /* 页脚 */
    .site-footer {
      background: #070A10;
      border-top: 1px solid var(--border-glow);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col-brand h3 {
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-col-brand p {
      line-height: 1.8;
      color: var(--text-dim);
      margin-bottom: 20px;
    }
    .footer-col-links h4 {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-col-links ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col-links a:hover {
      color: var(--color-cyan);
    }
    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 移动端与平板响应式适配 */
    @media (max-width: 1024px) {
      .hero-title-main { font-size: 40px; }
      .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
    }
    @media (max-width: 768px) {
      .section-wrap { padding: 60px 0; }
      .hero-angled-section { padding: 80px 0 60px; }
      .hero-title-main { font-size: 32px; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .hero-stat-row { grid-template-columns: 1fr; gap: 20px; }
      .footer-grid { grid-template-columns: 1fr; }
      .cta-input-control { width: 100%; }
      .cta-action-wrap { flex-direction: column; width: 100%; }
      .cta-btn-submit { width: 100%; }
      .tier-table th, .tier-table td { padding: 14px 16px; font-size: 13px; }
    }

/* roulang page: category1 */
:root {
      --bg-dark: #0B0F19;
      --bg-midnight: #0F172A;
      --bg-surface: rgba(30, 41, 59, 0.65);
      --bg-surface-hover: rgba(51, 65, 85, 0.75);
      --border-glow: rgba(255, 255, 255, 0.08);
      --border-blue: rgba(37, 99, 235, 0.35);
      --color-primary: #2563EB;
      --color-primary-light: #3B82F6;
      --color-emerald: #10B981;
      --color-cyan: #06B6D4;
      --color-warning: #F59E0B;
      --color-danger: #EF4444;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --glow-shadow: 0 0 25px rgba(59, 130, 246, 0.35);
      --glow-emerald: 0 0 20px rgba(16, 185, 129, 0.3);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 15% 20%, rgba(37, 99, 235, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 65%, rgba(16, 185, 129, 0.08) 0%, transparent 45%);
      color: var(--text-main);
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部微信息条 */
    .top-bar {
      background: rgba(11, 15, 25, 0.95);
      border-bottom: 1px solid var(--border-glow);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--color-emerald);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--color-emerald);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.1); }
      100% { opacity: 1; transform: scale(1); }
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glow);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #FFFFFF;
    }
    .logo-symbol {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-emerald));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 20px;
      color: #FFFFFF;
      box-shadow: var(--glow-shadow);
      flex-shrink: 0;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
      list-style: none;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 0;
      position: relative;
    }
    .nav-item a:hover, .nav-item a.active {
      color: #FFFFFF;
    }
    .nav-item a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--color-cyan), var(--color-emerald));
      border-radius: 2px;
    }
    .header-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--color-primary), #1D4ED8);
      color: #FFFFFF;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      box-shadow: var(--glow-shadow);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(37, 99, 235, 0.6);
      color: #FFFFFF;
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* 板块通用 */
    .section-wrap {
      padding: 76px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background: rgba(15, 23, 42, 0.5);
    }
    .section-head {
      margin-bottom: 44px;
    }
    .section-head.center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(37, 99, 235, 0.15);
      border: 1px solid var(--border-blue);
      border-radius: 30px;
      color: var(--color-cyan);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.35;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: rgba(59, 130, 246, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
    }

    /* 蓝图：Hero 居中搜索 + 热门问题/维度 chips */
    .category-hero-center {
      padding: 70px 0 50px;
      background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(11, 15, 25, 1) 100%),
                  url('/assets/images/3940ade0b0abe7fd.jpg') center/cover no-repeat;
      border-bottom: 1px solid var(--border-glow);
      text-align: center;
    }
    .breadcrumb-nav {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-dim);
      margin-bottom: 20px;
    }
    .breadcrumb-nav a {
      color: var(--text-muted);
    }
    .breadcrumb-nav a:hover {
      color: var(--color-cyan);
    }
    .hero-search-box {
      max-width: 640px;
      margin: 32px auto 20px;
      position: relative;
      display: flex;
      align-items: center;
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid var(--border-blue);
      border-radius: 50px;
      padding: 6px 8px 6px 20px;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    }
    .hero-search-input {
      flex: 1;
      background: transparent;
      border: none;
      outline: none;
      color: #FFFFFF;
      font-size: 15px;
    }
    .hero-search-input::placeholder {
      color: var(--text-dim);
    }
    .hero-search-btn {
      background: linear-gradient(135deg, var(--color-primary), var(--color-emerald));
      color: #FFFFFF;
      border: none;
      padding: 12px 26px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: var(--transition);
    }
    .hero-search-btn:hover {
      box-shadow: var(--glow-emerald);
      transform: scale(1.02);
    }
    .hot-chips {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }
    .chip-item {
      display: inline-block;
      padding: 6px 14px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-glow);
      color: var(--text-muted);
      font-size: 13px;
      transition: var(--transition);
    }
    .chip-item:hover, .chip-item.active {
      background: rgba(37, 99, 235, 0.2);
      border-color: var(--color-primary-light);
      color: #FFFFFF;
    }

    /* 筛选 Bar */
    .filter-bar-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      background: rgba(15, 23, 42, 0.7);
      border: 1px solid var(--border-glow);
      padding: 14px 20px;
      border-radius: var(--radius-md);
      margin-bottom: 36px;
    }
    .filter-tabs {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }
    .filter-tab {
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
    }
    .filter-tab:hover, .filter-tab.active {
      background: var(--color-primary);
      color: #FFFFFF;
      box-shadow: var(--glow-shadow);
      border-color: var(--color-primary-light);
    }
    .filter-meta-hint {
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 卡片网格 (3列) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .category-card {
      display: flex;
      flex-direction: column;
      height: 100%;
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .category-card:hover {
      transform: translateY(-6px);
      border-color: var(--color-primary-light);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
    }
    .card-thumb {
      height: 180px;
      width: 100%;
      position: relative;
      overflow: hidden;
      background-color: #1e293b;
    }
    .card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .category-card:hover .card-thumb img {
      transform: scale(1.06);
    }
    .card-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
      color: #FFFFFF;
      backdrop-filter: blur(8px);
    }
    .badge-live {
      background: rgba(239, 68, 68, 0.85);
    }
    .badge-data {
      background: rgba(37, 99, 235, 0.85);
    }
    .badge-ai {
      background: rgba(16, 185, 129, 0.85);
    }
    .card-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .card-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 12px;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: #FFFFFF;
      line-height: 1.45;
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex: 1;
    }
    .card-action {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid var(--border-glow);
      padding-top: 14px;
      margin-top: auto;
    }
    .card-btn {
      color: var(--color-cyan);
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .card-btn:hover {
      color: #FFFFFF;
    }

    /* 深度数据统计看板（双列左右布局） */
    .benchmark-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .rank-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .rank-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 18px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-sm);
    }
    .rank-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .rank-num {
      width: 26px;
      height: 26px;
      border-radius: 6px;
      background: rgba(37, 99, 235, 0.2);
      color: var(--color-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 13px;
    }
    .progress-bar-bg {
      width: 140px;
      height: 8px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 4px;
      overflow: hidden;
      margin-left: 16px;
    }
    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--color-primary), var(--color-emerald));
      border-radius: 4px;
    }

    /* 接入与协议指引（步骤卡片） */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: rgba(59, 130, 246, 0.25);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 手风琴/展开式卡片 */
    .faq-grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .faq-item-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px 28px;
    }
    .faq-q {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 12px;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .faq-icon {
      color: var(--color-cyan);
      font-size: 18px;
      line-height: 1.2;
    }
    .faq-a {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 回流 CTA 区 */
    .return-cta-card {
      background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
      border: 1px solid var(--border-blue);
      border-radius: var(--radius-lg);
      padding: 48px;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: var(--glow-shadow);
    }
    .return-cta-title {
      font-size: 28px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .return-cta-text {
      max-width: 660px;
      margin: 0 auto 28px;
      color: var(--text-muted);
      font-size: 15px;
    }
    .btn-glow-emerald {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 14px 34px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-emerald));
      color: #FFFFFF;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 700;
      box-shadow: var(--glow-emerald);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .btn-glow-emerald:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 35px rgba(16, 185, 129, 0.5);
      color: #FFFFFF;
    }

    /* 全局页脚 */
    .site-footer {
      background: #080C14;
      border-top: 1px solid var(--border-glow);
      padding: 64px 0 32px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-col-brand p {
      font-size: 13px;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .footer-col-links h4 {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-col-links ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col-links a {
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-col-links a:hover {
      color: var(--color-cyan);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-glow);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 移动端响应式断点 */
    @media (max-width: 1024px) {
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .header-cta {
        display: none;
      }
      .grid-3 {
        grid-template-columns: 1fr;
      }
      .benchmark-grid {
        grid-template-columns: 1fr;
      }
      .faq-grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding: 50px 0;
      }
      .section-title {
        font-size: 26px;
      }
      .return-cta-card {
        padding: 32px 20px;
      }
    }
    @media (max-width: 520px) {
      .step-grid {
        grid-template-columns: 1fr;
      }
      .hero-search-box {
        flex-direction: column;
        border-radius: var(--radius-md);
        padding: 12px;
        gap: 10px;
      }
      .hero-search-btn {
        width: 100%;
        text-align: center;
      }
    }