/* roulang page: index */
:root {
      --primary: #0F172A;
      --primary-dark: #090D16;
      --primary-light: #1E293B;
      --accent: #10B981;
      --accent-gold: #F59E0B;
      --accent-hover: #059669;
      --bg: #FAFAF9;
      --surface: #FFFFFF;
      --text: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border: rgba(15, 23, 42, 0.08);
      --border-dark: rgba(255, 255, 255, 0.1);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 10px 30px -4px rgba(15, 23, 42, 0.08);
      --max-w: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

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

    .container {
      width: 100%;
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 24px;
    }

    .top-bar {
      background-color: var(--primary);
      color: var(--text-light);
      font-size: 12px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }

    .site-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }

    .brand-logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .brand-logo span {
      color: var(--accent);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
    }

    .nav-links a:hover {
      color: var(--accent);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      gap: 6px;
    }

    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
    }

    .btn-primary:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }

    .btn-dark {
      background-color: var(--primary);
      color: #FFFFFF;
    }

    .btn-dark:hover {
      background-color: var(--primary-light);
    }

    .btn-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      font-size: 24px;
      color: var(--primary);
    }

    /* Hero Section */
    .hero-section {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #FFFFFF;
      padding: 80px 0 100px;
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }

    .hero-content h1 span {
      background: linear-gradient(90deg, #10B981, #34D399);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 16px;
      color: var(--text-light);
      line-height: 1.8;
      margin-bottom: 36px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-data-board {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 24px;
      backdrop-filter: blur(12px);
    }

    .board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-dark);
      margin-bottom: 16px;
    }

    .board-title {
      font-size: 14px;
      font-weight: 600;
      color: #F8FAFC;
    }

    .board-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      font-size: 13px;
    }

    .board-item:last-child {
      border-bottom: none;
    }

    .board-tag {
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 11px;
      font-weight: 600;
    }

    .tag-green { background: rgba(16, 185, 129, 0.15); color: #34D399; }
    .tag-gold { background: rgba(245, 158, 11, 0.15); color: #FBBF24; }

    /* Section Base */
    section {
      padding: 80px 0;
      scroll-margin-top: 80px;
    }

    .section-title-wrap {
      margin-bottom: 50px;
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-subtitle {
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 10px;
      display: block;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }

    .section-title.light {
      color: #FFFFFF;
    }

    .section-intro {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .section-intro.light {
      color: var(--text-light);
    }

    /* Section 2: Countdown / Limited Entry */
    .countdown-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border);
      padding: 40px 0;
    }

    .countdown-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      background: #F8FAFC;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px 32px;
    }

    .countdown-info {
      flex: 1;
    }

    .countdown-info h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .countdown-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .timer-boxes {
      display: flex;
      gap: 12px;
    }

    .timer-unit {
      background: var(--primary);
      color: #FFFFFF;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      text-align: center;
      min-width: 58px;
    }

    .timer-unit .num {
      font-size: 20px;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      display: block;
      line-height: 1.2;
    }

    .timer-unit .lbl {
      font-size: 11px;
      color: var(--text-light);
    }

    /* Section 3: Highlights Grid */
    .highlight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .highlight-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow);
      transition: all 0.3s ease;
    }

    .highlight-card:hover {
      transform: translateY(-4px);
      border-color: rgba(16, 185, 129, 0.4);
      box-shadow: var(--shadow-lg);
    }

    .highlight-icon {
      width: 44px;
      height: 44px;
      background: rgba(16, 185, 129, 0.1);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 20px;
    }

    .highlight-card h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--primary);
    }

    .highlight-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 4: Benefits & Perks */
    .perks-section {
      background: #FFFFFF;
    }

    .perks-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .perk-item {
      padding: 24px;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      background: var(--bg);
    }

    .perk-tag {
      font-size: 12px;
      color: var(--accent-gold);
      font-weight: 700;
      margin-bottom: 8px;
      display: inline-block;
    }

    .perk-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--primary);
    }

    .perk-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Section 5: Step Guide */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-box {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px 20px;
      position: relative;
    }

    .step-number {
      font-size: 12px;
      font-weight: 800;
      color: var(--accent);
      background: rgba(16, 185, 129, 0.1);
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 16px;
    }

    .step-box h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .step-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 6: Rewards / Metrics Dashboard */
    .dashboard-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-bottom: 40px;
    }

    .metric-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow);
    }

    .metric-val {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      font-variant-numeric: tabular-nums;
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-val span {
      font-size: 16px;
      color: var(--accent);
      margin-left: 2px;
    }

    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .metric-desc {
      font-size: 12px;
      color: var(--text-light);
    }

    /* Section 7: News & Insights */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
    }

    .news-thumb {
      height: 170px;
      overflow: hidden;
      background: var(--primary-light);
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }

    .news-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .news-meta {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .news-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }

    /* Section 8: Reviews / Social Proof */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow);
      position: relative;
    }

    .quote-icon {
      font-size: 28px;
      line-height: 1;
      color: var(--accent);
      margin-bottom: 12px;
      opacity: 0.8;
    }

    .review-text {
      font-size: 14px;
      color: var(--text);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 16px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 14px;
    }

    .reviewer-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
    }

    .reviewer-info span {
      font-size: 12px;
      color: var(--text-light);
    }

    /* Section 9: Contrast (Traditional vs Intelligent) */
    .contrast-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .contrast-col {
      border-radius: var(--radius-md);
      padding: 36px 30px;
      border: 1px solid var(--border);
    }

    .contrast-col.legacy {
      background: #F1F5F9;
    }

    .contrast-col.smart {
      background: #090D16;
      color: #FFFFFF;
      border-color: rgba(16, 185, 129, 0.3);
    }

    .contrast-col h4 {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .contrast-list li {
      padding: 14px 0;
      border-bottom: 1px solid rgba(0, 0, 0, 0.06);
      font-size: 14px;
      line-height: 1.6;
    }

    .contrast-col.smart .contrast-list li {
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      color: #E2E8F0;
    }

    /* Section 10: Milestones */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .timeline-node {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .timeline-phase {
      font-size: 12px;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 6px;
    }

    .timeline-node h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--primary);
    }

    .timeline-node p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 11: Assurance & Compliance */
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .assurance-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }

    .assurance-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin: 12px 0 8px;
      color: var(--primary);
    }

    .assurance-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Section 12: Solutions Matrix */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .solution-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      display: flex;
      flex-direction: column;
    }

    .solution-card h4 {
      font-size: 19px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--primary);
    }

    .solution-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }

    .solution-features {
      border-top: 1px solid var(--border);
      padding-top: 16px;
      font-size: 13px;
      color: var(--text);
    }

    .solution-features li {
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .solution-features li::before {
      content: "•";
      color: var(--accent);
      font-size: 16px;
    }

    /* Section 13: FAQ Section */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--text-muted);
    }

    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      background: #F8FAFC;
    }

    .faq-answer-inner {
      padding: 16px 24px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      border-top: 1px solid var(--border);
    }

    /* Section 14: Registration & Diagnosis Form */
    .consult-section {
      background: linear-gradient(135deg, #090D16 0%, #0F172A 100%);
      color: #FFFFFF;
      padding: 90px 0;
    }

    .consult-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .consult-content h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .consult-content p {
      font-size: 15px;
      color: var(--text-light);
      line-height: 1.8;
      margin-bottom: 30px;
    }

    .consult-features li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      margin-bottom: 14px;
      color: #E2E8F0;
    }

    .consult-features span {
      color: var(--accent);
      font-weight: 700;
    }

    .consult-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      color: var(--text);
      box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.4);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid #CBD5E1;
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text);
      outline: none;
      transition: border-color 0.25s ease;
    }

    .form-control:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    select.form-control {
      appearance: auto;
    }

    .checkbox-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 6px;
    }

    .checkbox-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--text-muted);
      cursor: pointer;
    }

    .checkbox-label input {
      accent-color: var(--accent);
    }

    /* Footer */
    .site-footer {
      background-color: #0B1120;
      color: var(--text-light);
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand h4 {
      font-size: 18px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      color: #94A3B8;
    }

    .footer-col h5 {
      font-size: 14px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      color: #64748B;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-grid, .consult-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .highlight-grid, .solutions-grid, .news-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dashboard-metrics, .perks-grid, .steps-wrapper, .timeline-grid, .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-inner .btn {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .highlight-grid, .solutions-grid, .news-grid, .reviews-grid, .dashboard-metrics, .perks-grid, .steps-wrapper, .timeline-grid, .assurance-grid, .contrast-wrapper, .footer-top {
        grid-template-columns: 1fr;
      }
      .countdown-bar {
        flex-direction: column;
        align-items: flex-start;
      }
      .timer-boxes {
        width: 100%;
        justify-content: space-between;
      }
      .consult-form-box {
        padding: 24px 18px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }