/* roulang page: index */
:root {
      --bg-dark: #060810;
      --bg-card: rgba(15, 23, 42, 0.7);
      --bg-card-hover: rgba(22, 33, 62, 0.85);
      --primary: #00D2FF;
      --primary-hover: #3A7BD5;
      --accent: #7928CA;
      --success: #10B981;
      --warning: #F59E0B;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 210, 255, 0.4);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-family);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 50% 0%, rgba(30, 58, 138, 0.25), transparent 45%), radial-gradient(circle at 10% 30%, rgba(121, 40, 202, 0.15), transparent 35%);
      background-repeat: no-repeat;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航系统 */
    .top-status-bar {
      height: 36px;
      background: rgba(6, 8, 16, 0.95);
      border-bottom: 1px solid var(--border-line);
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      position: relative;
      z-index: 1001;
    }
    .top-status-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .status-tags span {
      margin-right: 18px;
    }
    .status-tags .badge {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--success);
      font-weight: 600;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(20px);
      background: rgba(10, 15, 29, 0.8);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #fff;
    }
    .brand-logo svg {
      width: 32px;
      height: 32px;
    }
    .brand-logo span {
      background: linear-gradient(135deg, #00D2FF 0%, #3A7BD5 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .main-nav a {
      font-size: 15px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .main-nav a:hover, .main-nav a.active {
      color: var(--primary);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00D2FF 0%, #3A7BD5 100%);
      color: #060810;
      box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.6);
      color: #fff;
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.03);
      border-color: var(--border-line);
      color: var(--text-main);
      backdrop-filter: blur(8px);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: rgba(0, 210, 255, 0.08);
      color: var(--primary);
    }
    .btn-large {
      padding: 14px 32px;
      font-size: 16px;
      border-radius: 10px;
    }

    .nav-burger {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    /* 板块排版公用 */
    .section {
      padding: 90px 0;
      position: relative;
    }
    .section-border-top {
      border-top: 1px solid var(--border-line);
    }
    .section-darker {
      background: rgba(6, 8, 16, 0.6);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-subtitle {
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 2px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #fff;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    /* 卡片玻璃质感 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-line);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
      border-radius: 14px;
      padding: 30px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
      background: var(--bg-card-hover);
      box-shadow: 0 12px 30px -10px rgba(0, 210, 255, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    }

    /* 板块 1: 首屏 Banner 强转化落地 */
    .hero-section {
      padding: 100px 0 80px;
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.12), transparent 40%), linear-gradient(180deg, rgba(10, 15, 29, 0.6) 0%, rgba(6, 8, 16, 0.95) 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 46px;
      line-height: 1.2;
      font-weight: 800;
      margin-bottom: 22px;
      letter-spacing: -1px;
    }
    .hero-h1 em {
      font-style: normal;
      background: linear-gradient(135deg, #00D2FF 0%, #3A7BD5 60%, #7928CA 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-trust-bar {
      display: flex;
      gap: 24px;
      border-top: 1px solid var(--border-line);
      padding-top: 24px;
    }
    .trust-stat-item .num {
      font-size: 22px;
      font-weight: 700;
      color: #fff;
    }
    .trust-stat-item .lbl {
      font-size: 13px;
      color: var(--text-dim);
    }
    .hero-visual-card {
      position: relative;
      border-radius: 16px;
      border: 1px solid rgba(0, 210, 255, 0.25);
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(20px);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }
    .hero-radar-preview {
      width: 100%;
      height: 270px;
      object-fit: cover;
      border-radius: 10px;
      margin-bottom: 18px;
    }
    .hero-chip-row {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      font-size: 12px;
      color: var(--text-muted);
    }
    .hero-chip {
      background: rgba(255, 255, 255, 0.05);
      padding: 8px 12px;
      border-radius: 6px;
      border: 1px solid var(--border-line);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .chip-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--success);
    }

    /* 板块 2: 底层数据与算法架构 */
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .tech-spec-box {
      border: 1px solid var(--border-line);
      background: rgba(15, 23, 42, 0.4);
      border-radius: 12px;
      padding: 24px;
      margin-top: 24px;
    }
    .tech-metric-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-line);
      font-size: 14px;
    }
    .tech-metric-row:last-child {
      border-bottom: none;
    }
    .tech-val {
      color: var(--primary);
      font-weight: 700;
    }

    /* 板块 3: 六维优势矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 210, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
    }
    .feature-title {
      font-size: 18px;
      margin-bottom: 12px;
      font-weight: 700;
    }

    /* 板块 4: 评估方案阶梯 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: center;
    }
    .price-card {
      border: 1px solid var(--border-line);
      background: var(--bg-card);
      border-radius: 14px;
      padding: 36px 28px;
      position: relative;
      transition: all 0.3s;
    }
    .price-card.featured {
      transform: scale(1.05);
      border-color: var(--primary);
      box-shadow: 0 0 35px rgba(0, 210, 255, 0.2);
      background: rgba(20, 30, 58, 0.9);
      z-index: 2;
    }
    .popular-badge {
      position: absolute;
      top: 14px;
      right: 18px;
      background: linear-gradient(135deg, #00D2FF 0%, #3A7BD5 100%);
      color: #060810;
      font-size: 11px;
      font-weight: 800;
      padding: 4px 10px;
      border-radius: 12px;
    }
    .price-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .price-target {
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 20px;
    }
    .price-list {
      list-style: none;
      margin: 24px 0 32px;
    }
    .price-list li {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .price-list li svg {
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 板块 5: 4步推演流程 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      padding: 24px;
      border-radius: 12px;
      background: rgba(15, 23, 42, 0.5);
      border: 1px solid var(--border-line);
      position: relative;
    }
    .step-num {
      font-size: 32px;
      font-weight: 900;
      color: rgba(0, 210, 255, 0.25);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #fff;
    }
    .step-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 6: 案例对比墙 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      border-radius: 14px;
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-thumb {
      height: 170px;
      width: 100%;
      object-fit: cover;
    }
    .case-body {
      padding: 22px;
      flex-grow: 1;
    }
    .case-tag {
      font-size: 11px;
      background: rgba(0, 210, 255, 0.1);
      color: var(--primary);
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }
    .case-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .case-stats {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-line);
      margin-top: 16px;
      padding-top: 14px;
      font-size: 12px;
      color: var(--text-dim);
    }
    .case-stats strong {
      color: var(--success);
      font-size: 14px;
    }

    /* 板块 7: 关键指标条 */
    .metrics-bar {
      background: linear-gradient(90deg, rgba(16, 26, 52, 0.8) 0%, rgba(30, 24, 60, 0.8) 100%);
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
      padding: 40px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .metric-digit {
      font-size: 40px;
      font-weight: 800;
      background: linear-gradient(135deg, #fff 30%, #00D2FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 板块 8: 真实评价区 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #00D2FF, #7928CA);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      color: #fff;
    }
    .user-meta h4 {
      font-size: 15px;
      font-weight: 600;
    }
    .user-meta p {
      font-size: 12px;
      color: var(--text-dim);
    }
    .review-stars {
      color: #F59E0B;
      font-size: 13px;
      margin-bottom: 10px;
    }

    /* 板块 9: 楼市前沿内嵌资讯 */
    .insights-grid {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 32px;
      align-items: stretch;
    }
    .insight-featured {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 14px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .insight-featured img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .insight-featured-content {
      padding: 24px;
      flex-grow: 1;
    }
    .insight-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .insight-list-item {
      padding: 18px 22px;
      border-radius: 12px;
      background: rgba(15, 23, 42, 0.4);
      border: 1px solid var(--border-line);
      transition: all 0.2s;
    }
    .insight-list-item:hover {
      border-color: var(--primary);
      background: rgba(15, 23, 42, 0.7);
    }
    .insight-date {
      font-size: 12px;
      color: var(--text-dim);
      margin-bottom: 4px;
    }

    /* 板块 10: 权威背书与保障条 */
    .security-bar {
      border: 1px solid var(--border-line);
      background: rgba(10, 15, 29, 0.6);
      border-radius: 16px;
      padding: 32px;
    }
    .security-badges {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .sec-badge-item svg {
      width: 32px;
      height: 32px;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .sec-badge-item h5 {
      font-size: 15px;
      margin-bottom: 6px;
    }
    .sec-badge-item p {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 板块 11: 智能FAQ手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item:hover {
      border-color: rgba(0, 210, 255, 0.3);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-toggle-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1), padding 0.3s;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 400px;
      padding: 0 24px 20px;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 板块 12: 底部决策激发 CTA */
    .cta-banner-box {
      border-radius: 20px;
      background: linear-gradient(135deg, rgba(14, 30, 68, 0.9) 0%, rgba(35, 12, 60, 0.9) 100%);
      border: 1px solid rgba(0, 210, 255, 0.3);
      padding: 60px 40px;
      text-align: center;
      position: relative;
      box-shadow: 0 0 50px rgba(0, 210, 255, 0.15);
    }
    .cta-banner-box h2 {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 18px;
    }
    .cta-banner-box p {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 32px;
    }

    /* 页脚系统 */
    .site-footer {
      background: #04060b;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-dim);
    }
    .footer-grid {
      display: grid;
grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h3 {
      font-size: 20px;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-size: 13px;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 15px;
      margin-bottom: 18px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact-list {
      list-style: none;
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-contact-list li {
      margin-bottom: 12px;
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12px;
    }

    /* 移动端响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid, .cases-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .price-card.featured {
        transform: none;
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
      .security-badges {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-status-bar {
        display: none;
      }
      .main-nav {
        display: none;
      }
      .nav-burger {
        display: block;
      }
      .mobile-menu-open .main-nav {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(6, 8, 16, 0.98);
        padding: 40px 24px;
        gap: 24px;
        z-index: 999;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .tech-grid, .insights-grid {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid, .cases-grid, .reviews-grid, .flow-steps {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .security-badges {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }