:root {
      --blue-950: #0b2f4d;
      --blue-900: #0f3f66;
      --blue-700: #1f6f9f;
      --blue-500: #49a7d8;
      --blue-100: #eaf7fd;
      --blue-50: #f5fbfe;
      --green-600: #21856f;
      --ink: #1d2935;
      --muted: #607080;
      --line: #d9edf6;
      --white: #ffffff;
      --shadow: 0 16px 40px rgba(15, 63, 102, 0.11);
      --radius: 14px;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      font-family: Arial, sans-serif;
      color: var(--ink);
      background: var(--white);
      line-height: 1.65;
    }

    a { color: inherit; text-decoration: none; }

    .container {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
    }

    .topbar {
      background: var(--blue-900);
      color: var(--white);
      font-size: 14px;
    }

    .topbar-inner {
      min-height: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 255, 255, 0.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      min-width: 250px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .brand-logo {
      width: 44px;
      height: 44px;
      border-radius: 6px;
      object-fit: contain;
      background: #06151e;
      padding: 4px;
      flex: 0 0 auto;
    }

    .brand strong {
      display: block;
      color: var(--blue-900);
      font-size: 18px;
      line-height: 1.2;
    }

    .brand span span {
      display: block;
      color: var(--muted);
      font-size: 13px;
      margin-top: 3px;
    }

    .nav {
      display: flex;
      align-items: center;
      gap: 22px;
      color: #405466;
      font-size: 14px;
      white-space: nowrap;
    }

    .nav a,
    .nav summary {
      color: #405466;
      font: inherit;
      cursor: pointer;
    }

    .nav a:hover,
    .nav summary:hover { color: var(--blue-700); }

    .nav-item { position: relative; }

    .nav-item summary {
      list-style: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .nav-item summary::-webkit-details-marker { display: none; }

    .nav-caret {
      width: 7px;
      height: 7px;
      border-right: 1.8px solid currentColor;
      border-bottom: 1.8px solid currentColor;
      transform: rotate(45deg);
      margin-top: -3px;
      transition: transform 180ms ease;
    }

    .nav-item[open] .nav-caret,
    .nav-item:hover .nav-caret {
      transform: rotate(225deg);
      margin-top: 3px;
    }

    .nav-dropdown {
      position: absolute;
      top: calc(100% + 14px);
      left: 0;
      min-width: 190px;
      display: none;
      padding: 8px;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 12px;
      box-shadow: 0 16px 34px rgba(15, 63, 102, 0.14);
    }

    .nav-item:hover .nav-dropdown,
    .nav-item[open] .nav-dropdown {
      display: grid;
      gap: 4px;
    }

    .nav-dropdown a {
      display: block;
      padding: 11px 12px;
      border-radius: 8px;
      color: var(--blue-900);
      font-weight: 700;
    }

    .nav-dropdown a:hover,
    .nav-dropdown a:focus {
      background: var(--blue-50);
      color: var(--blue-700);
      outline: none;
    }

    .menu-toggle {
      display: none;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: var(--white);
      color: var(--blue-900);
      cursor: pointer;
      flex-direction: column;
      gap: 5px;
    }

    .menu-toggle span,
    .menu-toggle::before,
    .menu-toggle::after {
      content: "";
      display: block;
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 999px;
      transition: transform 180ms ease, opacity 180ms ease;
    }

    .header.menu-open .menu-toggle::before { transform: translateY(7px) rotate(45deg); }
    .header.menu-open .menu-toggle span { opacity: 0; }
    .header.menu-open .menu-toggle::after { transform: translateY(-7px) rotate(-45deg); }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 18px;
      border-radius: 8px;
      border: 1px solid transparent;
      font-weight: 700;
      font-size: 14px;
      cursor: pointer;
      transition: background 220ms ease, color 220ms ease, border-color 220ms ease, transform 220ms ease;
    }

    .button:hover,
    .button:focus {
      transform: translateY(-1px);
      outline: none;
    }

    .button-primary {
      background: var(--blue-700);
      color: var(--white);
      box-shadow: 0 10px 24px rgba(31, 111, 159, 0.22);
    }

    .button-secondary {
      background: var(--white);
      color: var(--blue-900);
      border-color: var(--line);
    }

    .button-soft {
      background: var(--blue-50);
      color: var(--blue-900);
      border-color: var(--line);
    }

    .breadcrumb-wrap {
      background: var(--blue-50);
      border-bottom: 1px solid var(--line);
      padding: 14px 0;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
      color: var(--muted);
      font-size: 14px;
    }

    .breadcrumb a {
      color: var(--blue-900);
      font-weight: 700;
    }

    .hero {
      background: linear-gradient(180deg, var(--blue-50), var(--white));
      padding: 64px 0 56px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
      gap: 46px;
      align-items: center;
    }

    .eyebrow {
      color: var(--blue-700);
      font-weight: 700;
      margin: 0 0 10px;
    }

    h1, h2, h3, p { margin-top: 0; }

    h1 {
      color: var(--blue-900);
      font-size: clamp(38px, 5vw, 58px);
      line-height: 1.08;
      margin-bottom: 14px;
    }

    .hero-subtitle {
      color: var(--blue-700);
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .lead {
      color: #405466;
      font-size: 18px;
      max-width: 740px;
    }

    .hero-actions,
    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }

    .hero-image {
      border-radius: 18px;
      border: 1px solid var(--line);
      background: var(--white);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-image img {
      width: 100%;
      min-height: 390px;
      display: block;
      object-fit: cover;
    }

    .hero-roadmap {
      position: relative;
      grid-column: 1 / -1;
      margin-top: 34px;
    }

    .hero-roadmap ol {
      position: relative;
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 18px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .hero-roadmap ol::before {
      content: "";
      position: absolute;
      left: 5%;
      right: 5%;
      top: 35px;
      height: 3px;
      border-radius: 999px;
      background: linear-gradient(90deg, #38a3c8, #62b88f, #e6b84c, #e58055, #21856f);
      opacity: 0.24;
    }

    .hero-roadmap li {
      position: relative;
      z-index: 1;
      min-height: 132px;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: rgba(255, 255, 255, 0.94);
      box-shadow: 0 10px 24px rgba(15, 63, 102, 0.06);
      color: var(--blue-900);
      font-size: 17px;
      font-weight: 700;
      line-height: 1.35;
      overflow: visible;
      transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
    }

    .hero-roadmap li:hover {
      transform: translateY(-5px);
      border-color: var(--roadmap-color, var(--blue-500));
      box-shadow: 0 20px 42px rgba(15, 63, 102, 0.14);
    }

    .hero-roadmap li::before {
      content: "";
      display: block;
      width: 42px;
      height: 42px;
      margin-bottom: 14px;
      border-radius: 50%;
      background: var(--roadmap-color, var(--blue-500));
      box-shadow: 0 0 0 8px rgba(73, 167, 216, 0.14);
      animation: iconBreath 2600ms ease-in-out infinite;
      transition: transform 220ms ease, box-shadow 220ms ease;
    }

    .hero-roadmap li:hover::before {
      transform: translateY(-2px) scale(1.08);
      box-shadow: 0 0 0 12px rgba(73, 167, 216, 0.16);
    }

    .hero-roadmap li::after {
      content: "";
      position: absolute;
      left: 18px;
      bottom: 0;
      height: 4px;
      width: 34px;
      border-radius: 999px;
      background: var(--roadmap-color, var(--blue-500));
    }

    .hero-roadmap li:nth-child(1) { --roadmap-color: #38a3c8; }
    .hero-roadmap li:nth-child(2) { --roadmap-color: #62b88f; }
    .hero-roadmap li:nth-child(3) { --roadmap-color: #e6b84c; }
    .hero-roadmap li:nth-child(4) { --roadmap-color: #e58055; }
    .hero-roadmap li:nth-child(5) { --roadmap-color: #21856f; }

    .hero-image {
      position: relative;
    }

    .hero-image::after {
      content: "";
      position: absolute;
      width: 84px;
      height: 84px;
      right: 24px;
      top: 24px;
      border-radius: 50%;
      border: 1px solid rgba(73, 167, 216, 0.26);
      background: radial-gradient(circle, rgba(73, 167, 216, 0.24), rgba(73, 167, 216, 0));
      animation: pulseMarker 2600ms ease-in-out infinite;
      pointer-events: none;
    }

    @keyframes pulseMarker {
      0%, 100% { transform: scale(0.88); opacity: 0.55; }
      50% { transform: scale(1.08); opacity: 1; }
    }

    @keyframes iconBreath {
      0%, 100% { filter: saturate(1); }
      50% { filter: saturate(1.12); }
    }

    @keyframes iconFloat {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-2px); }
    }

    section { padding: 64px 0; }
    .soft-band { background: var(--blue-50); }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-head h2 {
      color: var(--blue-900);
      font-size: 32px;
      line-height: 1.2;
      margin-bottom: 8px;
    }

    .section-head p {
      color: var(--muted);
      max-width: 680px;
      margin-bottom: 0;
    }

    .text-block {
      max-width: 880px;
      color: #405466;
      font-size: 17px;
    }

    .text-block p:last-child { margin-bottom: 0; }

    .grid {
      display: grid;
      gap: 18px;
    }

    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-auto { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

    .card,
    .small-card,
    .faq-item {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--white);
      box-shadow: 0 10px 24px rgba(15, 63, 102, 0.06);
    }

    .card {
      display: flex;
      flex-direction: column;
      min-height: 100%;
      overflow: hidden;
      transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
    }

    a.card:focus-visible,
    .card:focus-within,
    .small-card:focus-within {
      outline: none;
      box-shadow: 0 0 0 4px rgba(73, 167, 216, 0.22), 0 18px 38px rgba(15, 63, 102, 0.14);
      border-color: var(--blue-500);
    }

    .card:hover,
    .small-card:hover {
      transform: translateY(-5px);
      border-color: var(--blue-500);
      box-shadow: 0 20px 42px rgba(15, 63, 102, 0.14);
    }

    .card:hover img,
    .card:focus-within img,
    a.card:focus-visible img {
      transform: scale(1.05);
    }

    .card:hover h3,
    .small-card:hover h3,
    a.card:focus-visible h3 {
      color: var(--blue-700);
    }

    .card-media {
      aspect-ratio: 16 / 10;
      margin: 12px 12px 0;
      border-radius: 12px;
      overflow: hidden;
      background: var(--blue-100);
    }

    .card-media img {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: cover;
      transition: transform 240ms ease;
    }

    .card-body {
      display: flex;
      flex-direction: column;
      flex: 1;
      padding: 18px;
    }

    .badge {
      width: fit-content;
      min-height: 26px;
      display: inline-flex;
      align-items: center;
      padding: 0 9px;
      border-radius: 999px;
      background: var(--blue-100);
      color: var(--blue-900);
      font-size: 12px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .card h3,
    .small-card h3 {
      color: var(--blue-900);
      font-size: 19px;
      line-height: 1.3;
      margin-bottom: 9px;
      transition: color 220ms ease;
    }

    .hero-roadmap li,
    .symptom-card h3,
    .risk-item h4,
    .stage-card h3,
    .flow-card h3,
    .care-card h3,
    .treatment-link-card strong,
    #related-grid .small-card h3 {
      color: var(--blue-900);
      font-size: 19px;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: 0;
    }

    .card p,
    .small-card p {
      color: #405466;
      font-size: 14px;
      line-height: 1.5;
      margin-bottom: 14px;
    }

    .small-card {
      position: relative;
      padding: 18px;
      overflow: hidden;
      transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
    }

    .small-card::after {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 0;
      height: 4px;
      border-radius: 999px 999px 0 0;
      background: var(--accent-color, var(--blue-500));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 240ms ease;
    }

    .small-card:hover::after,
    .small-card:focus-within::after {
      transform: scaleX(1);
    }

    .small-card .card-icon {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 12px;
      border-radius: 12px;
      background: var(--blue-100);
      color: var(--blue-900);
      font-weight: 800;
      font-size: 18px;
      animation: iconFloat 3200ms ease-in-out infinite;
      transition: transform 220ms ease, box-shadow 220ms ease, background 220ms ease;
    }

    .small-card:hover .card-icon,
    .small-card:focus-within .card-icon {
      transform: translateY(-2px) rotate(6deg) scale(1.06);
      box-shadow: 0 10px 20px rgba(15, 63, 102, 0.12);
    }

    .small-card:nth-child(4n+1) { --accent-color: #38a3c8; }
    .small-card:nth-child(4n+2) { --accent-color: #62b88f; }
    .small-card:nth-child(4n+3) { --accent-color: #e6b84c; }
    .small-card:nth-child(4n+4) { --accent-color: #e58055; }

    .small-card:nth-child(4n+1) .card-icon { background: rgba(56, 163, 200, 0.14); }
    .small-card:nth-child(4n+2) .card-icon { background: rgba(98, 184, 143, 0.16); }
    .small-card:nth-child(4n+3) .card-icon { background: rgba(230, 184, 76, 0.18); }
    .small-card:nth-child(4n+4) .card-icon { background: rgba(229, 128, 85, 0.16); }

    .timeline::after,
    .treatment-flow::after {
      content: "";
      position: absolute;
      z-index: 0;
      left: 6%;
      right: 6%;
      top: 35px;
      height: 3px;
      border-radius: 999px;
      background: linear-gradient(90deg, #38a3c8, #62b88f, #e6b84c, #e58055, #21856f);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 1000ms ease;
    }

    .timeline.is-visible::after,
    .treatment-flow.is-visible::after {
      transform: scaleX(1);
    }

    .symptom-summary-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 18px;
      margin-bottom: 22px;
    }

    .symptom-card ul {
      display: grid;
      gap: 8px;
      margin: 0;
      padding-left: 18px;
      color: #405466;
      font-size: 14px;
      line-height: 1.45;
    }

    .symptom-card p {
      margin-bottom: 12px;
    }

    .risk-matrix {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 24px;
    }

    .risk-panel {
      position: relative;
      overflow: hidden;
      padding: 28px;
      border: 1px solid #cfe8f5;
      border-radius: 20px;
      background: #ffffff;
      box-shadow: 0 12px 30px rgba(15, 76, 117, 0.06);
    }

    .risk-panel::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      width: 100%;
      height: 4px;
      background: var(--accent-color, var(--blue-700));
    }

    .risk-panel--fixed {
      --accent-color: #0f4c75;
    }

    .risk-panel--modifiable {
      --accent-color: #1f9d8a;
      background: linear-gradient(135deg, #ffffff 0%, #f6fdfb 100%);
    }

    .risk-panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 18px;
    }

    .risk-title-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
    }

    .risk-icon {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex: 0 0 auto;
      border-radius: 12px;
      background: rgba(15, 76, 117, 0.09);
      color: var(--accent-color, var(--blue-700));
      font-size: 16px;
      font-weight: 800;
    }

    .risk-panel h3,
    .risk-note h3 {
      color: var(--blue-900);
      font-size: 20px;
      line-height: 1.3;
      margin: 0;
    }

    .risk-item {
      padding: 18px 0;
      border-bottom: 1px solid rgba(15, 76, 117, 0.1);
      transition: background 180ms ease, transform 180ms ease, padding 180ms ease;
    }

    .risk-item:hover {
      padding-left: 10px;
      padding-right: 10px;
      border-radius: 12px;
      background: #f6fbff;
      transform: translateY(-1px);
    }

    .risk-item:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .risk-item-title {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 6px;
    }

    .risk-dot {
      width: 9px;
      height: 9px;
      border-radius: 999px;
      background: var(--accent-color, var(--blue-700));
      flex: 0 0 auto;
    }

    .risk-item h4 {
      margin: 0;
    }

    .risk-item p,
    .risk-note p {
      color: #405466;
      line-height: 1.6;
      margin: 0;
    }

    .risk-note {
      grid-column: 1 / -1;
      margin-top: 0;
      padding: 22px 24px;
      border: 1px solid #cfe8f5;
      border-left: 5px solid #1f9d8a;
      border-radius: 18px;
      background: linear-gradient(135deg, #f3fbff 0%, #ffffff 100%);
      box-shadow: 0 10px 24px rgba(15, 76, 117, 0.05);
    }

    .risk-note-head {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 8px;
    }

    .risk-note h3 {
      font-size: 18px;
    }

    .risk-note-icon {
      width: 28px;
      height: 28px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex: 0 0 auto;
      border-radius: 10px;
      background: rgba(31, 157, 138, 0.12);
      color: #1f9d8a;
      font-weight: 800;
    }

    .checklist {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .checklist li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 14px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: var(--white);
      color: #405466;
      transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
    }

    .checklist li:hover {
      transform: translateX(4px);
      border-color: var(--blue-500);
      background: rgba(255, 255, 255, 0.92);
      box-shadow: 0 12px 26px rgba(15, 63, 102, 0.09);
    }

    .checklist li::before {
      content: "";
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--blue-500);
      margin-top: 9px;
      flex: 0 0 auto;
    }

    .link-list {
      display: grid;
      gap: 7px;
      margin: 14px 0 18px;
      padding: 0;
      list-style: none;
    }

    .link-list a {
      display: flex;
      gap: 8px;
      align-items: flex-start;
      color: var(--blue-900);
      font-weight: 700;
      font-size: 14px;
      line-height: 1.35;
      padding: 6px 0;
      border-bottom: 1px solid rgba(217, 237, 246, 0.85);
    }

    .link-list a::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--blue-500);
      margin-top: 6px;
      flex: 0 0 auto;
    }

    .link-list a:hover,
    .link-list a:focus {
      color: var(--blue-700);
      outline: none;
    }

    .card-link {
      color: var(--blue-900);
      font-weight: 700;
      margin-top: auto;
      transition: color 220ms ease;
    }

    .card:hover .card-link,
    a.card:focus-visible .card-link { color: var(--blue-700); }

    .timeline {
      position: relative;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      counter-reset: step;
    }

    .timeline::before {
      content: "";
      position: absolute;
      z-index: 0;
      left: 6%;
      right: 6%;
      top: 35px;
      height: 3px;
      border-radius: 999px;
      background: linear-gradient(90deg, #38a3c8, #62b88f, #e6b84c, #e58055);
      opacity: 0.22;
    }

    .stage-card {
      position: relative;
      z-index: 1;
      counter-increment: step;
      min-height: 100%;
      padding: 18px 18px 20px;
      border: 1px solid var(--line);
      border-top: 5px solid var(--stage-color, var(--blue-500));
      border-radius: var(--radius);
      background: var(--white);
      box-shadow: 0 10px 24px rgba(15, 63, 102, 0.06);
      overflow: hidden;
      transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
    }

    .stage-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 42px rgba(15, 63, 102, 0.14);
    }

    .stage-card::before {
      content: "Mức " counter(step);
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(234, 247, 253, 0.95);
      color: var(--blue-900);
      font-weight: 700;
      margin-bottom: 14px;
    }

    .stage-card::after {
      content: "";
      position: absolute;
      width: 92px;
      height: 92px;
      right: -30px;
      top: -34px;
      border-radius: 50%;
      background: var(--stage-wash, rgba(73, 167, 216, 0.14));
    }

    .stage-card h3 {
      margin-bottom: 8px;
    }

    .stage-card ul {
      margin: 0;
      padding-left: 18px;
      color: #405466;
      font-size: 14px;
    }

    .stage-joint {
      height: 66px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 0 14px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(234, 247, 253, 0.92), rgba(255, 255, 255, 0.7));
    }

    .stage-joint svg {
      width: 96px;
      height: 48px;
      overflow: visible;
    }

    .stage-card:nth-child(1) { --stage-color: #38a3c8; --stage-wash: rgba(56, 163, 200, 0.13); }
    .stage-card:nth-child(2) { --stage-color: #62b88f; --stage-wash: rgba(98, 184, 143, 0.15); }
    .stage-card:nth-child(3) { --stage-color: #e6b84c; --stage-wash: rgba(230, 184, 76, 0.18); }
    .stage-card:nth-child(4) { --stage-color: #e58055; --stage-wash: rgba(229, 128, 85, 0.17); }

    .treatment-flow {
      position: relative;
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 18px;
    }

    .treatment-flow::before {
      content: "";
      position: absolute;
      left: 5%;
      right: 5%;
      top: 34px;
      height: 3px;
      border-radius: 999px;
      background: linear-gradient(90deg, #38a3c8, #62b88f, #e6b84c, #e58055, #21856f);
      opacity: 0.24;
    }

    .flow-card {
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      min-height: 100%;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: rgba(255, 255, 255, 0.94);
      box-shadow: 0 10px 24px rgba(15, 63, 102, 0.06);
      transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
    }

    .flow-card::after {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 0;
      height: 4px;
      border-radius: 999px 999px 0 0;
      background: var(--flow-color, var(--blue-500));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 240ms ease;
    }

    .flow-card:hover::after,
    .flow-card:focus-within::after {
      transform: scaleX(1);
    }

    .flow-card:hover,
    .flow-card:focus-within {
      transform: translateY(-5px);
      border-color: var(--flow-color, var(--blue-500));
      box-shadow: 0 20px 42px rgba(15, 63, 102, 0.14);
    }

    .flow-node {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      border-radius: 50%;
      background: var(--flow-color, var(--blue-500));
      color: var(--white);
      font-weight: 800;
      box-shadow: 0 0 0 8px rgba(73, 167, 216, 0.14);
      animation: iconBreath 3000ms ease-in-out infinite;
      transition: transform 220ms ease, box-shadow 220ms ease;
    }

    .flow-card:hover .flow-node,
    .flow-card:focus-within .flow-node {
      transform: translateY(-2px) scale(1.08);
      box-shadow: 0 0 0 12px rgba(73, 167, 216, 0.16);
    }

    .flow-card h3 {
      margin-bottom: 9px;
      transition: color 220ms ease;
    }

    .flow-card p {
      color: #405466;
      font-size: 14px;
      line-height: 1.5;
    }

    .flow-card:nth-child(1) { --flow-color: #38a3c8; }
    .flow-card:nth-child(2) { --flow-color: #62b88f; }
    .flow-card:nth-child(3) { --flow-color: #e6b84c; }
    .flow-card:nth-child(4) { --flow-color: #e58055; }
    .flow-card:nth-child(5) { --flow-color: #21856f; }

    .treatment-flow .flow-card {
      grid-column: span 2;
    }

    .treatment-flow .flow-card:nth-child(4) {
      grid-column: 2 / span 2;
    }

    .treatment-flow .flow-card:nth-child(5) {
      grid-column: 4 / span 2;
    }

    .treatment-path {
      display: grid;
      grid-template-columns: minmax(230px, 290px) minmax(0, 1fr);
      gap: 26px;
      align-items: start;
    }

    .treatment-tabs {
      position: sticky;
      top: 92px;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(255, 255, 255, 0.94);
      box-shadow: 0 18px 42px rgba(15, 63, 102, 0.08);
    }

    .treatment-tabs h3 {
      margin-bottom: 16px;
      color: var(--blue-900);
      font-size: 15px;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .treatment-tab-list {
      display: grid;
      gap: 10px;
    }

    .treatment-tab {
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      gap: 12px;
      width: 100%;
      padding: 12px;
      border: 1px solid transparent;
      border-radius: 14px;
      background: transparent;
      color: var(--text);
      text-align: left;
      cursor: pointer;
      transition: background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
    }

    .treatment-tab:hover,
    .treatment-tab:focus-visible,
    .treatment-tab.is-active {
      border-color: rgba(73, 167, 216, 0.34);
      background: linear-gradient(135deg, rgba(232, 246, 252, 0.95), rgba(255, 255, 255, 0.96));
      box-shadow: 0 12px 26px rgba(15, 63, 102, 0.08);
      transform: translateY(-1px);
      outline: none;
    }

    .treatment-tab-index {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      background: rgba(73, 167, 216, 0.13);
      color: var(--blue-700);
      font-weight: 800;
      font-size: 13px;
    }

    .treatment-tab.is-active .treatment-tab-index {
      background: var(--blue-500);
      color: var(--white);
      box-shadow: 0 0 0 6px rgba(73, 167, 216, 0.14);
    }

    .treatment-tab strong {
      display: block;
      color: var(--blue-900);
      font-size: 15px;
      line-height: 1.35;
    }

    .treatment-tab span:last-child {
      display: block;
      margin-top: 3px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.35;
    }

    .treatment-panel {
      min-width: 0;
      padding: 26px;
      border: 1px solid rgba(73, 167, 216, 0.24);
      border-radius: 22px;
      background:
        radial-gradient(circle at 100% 0%, rgba(73, 167, 216, 0.12), transparent 30%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(245, 252, 255, 0.94));
      box-shadow: 0 22px 50px rgba(15, 63, 102, 0.1);
    }

    .treatment-accordion {
      display: none;
    }

    .treatment-panel-head {
      display: grid;
      gap: 12px;
      margin-bottom: 22px;
    }

    .treatment-panel h3 {
      color: var(--blue-900);
      font-size: 30px;
      line-height: 1.16;
      margin: 0;
    }

    .treatment-panel > p,
    .treatment-panel-head p {
      color: #405466;
      font-size: 16px;
      line-height: 1.7;
      margin: 0;
    }

    .treatment-detail-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
      margin-bottom: 22px;
    }

    .treatment-detail-card,
    .treatment-links,
    .treatment-note {
      border: 1px solid var(--line);
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.9);
      box-shadow: 0 10px 24px rgba(15, 63, 102, 0.05);
    }

    .treatment-detail-card {
      padding: 18px;
    }

    .treatment-detail-card h4,
    .treatment-links h4 {
      margin: 0 0 12px;
      color: var(--blue-900);
      font-size: 16px;
    }

    .treatment-detail-card ul {
      display: grid;
      gap: 8px;
      margin: 0;
      padding-left: 18px;
      color: #405466;
      line-height: 1.55;
    }

    .treatment-links {
      padding: 18px;
      margin-bottom: 16px;
    }

    .stage-next {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-top: 22px;
      padding: 16px 18px;
      border: 1px solid rgba(73, 167, 216, 0.26);
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.82);
      box-shadow: 0 12px 28px rgba(15, 63, 102, 0.06);
    }

    .stage-next p {
      margin: 0;
      color: #405466;
      line-height: 1.55;
    }

    .treatment-link-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
    }

    .treatment-link-card {
      display: grid;
      gap: 9px;
      min-height: 112px;
      padding: 15px;
      border: 1px solid rgba(73, 167, 216, 0.24);
      border-radius: 14px;
      background: rgba(232, 246, 252, 0.58);
      color: var(--blue-900);
      transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
    }

    .treatment-link-card:hover,
    .treatment-link-card:focus-visible {
      transform: translateY(-2px);
      border-color: rgba(33, 133, 111, 0.5);
      box-shadow: 0 14px 30px rgba(15, 63, 102, 0.11);
      outline: none;
    }

    .treatment-link-card.is-disabled {
      cursor: not-allowed;
      opacity: 0.62;
      background: rgba(255, 255, 255, 0.68);
    }

    .treatment-link-card strong {
      line-height: 1.3;
    }

    .treatment-link-card em {
      color: #5f7281;
      font-size: 12px;
      font-style: normal;
      font-weight: 800;
    }

    .treatment-link-card.is-disabled .treatment-tag {
      background: rgba(64, 84, 102, 0.1);
      color: #5f7281;
    }

    .treatment-tag {
      width: fit-content;
      display: inline-flex;
      align-items: center;
      padding: 5px 9px;
      border-radius: 999px;
      background: rgba(33, 133, 111, 0.12);
      color: var(--green-700);
      font-size: 12px;
      font-weight: 800;
    }

    .small-card.is-disabled {
      cursor: not-allowed;
      opacity: 0.64;
      background: rgba(255, 255, 255, 0.72);
    }

    .small-card.is-disabled .card-link {
      color: #5f7281;
    }

    .treatment-note {
      padding: 15px 16px;
      border-color: rgba(230, 184, 76, 0.42);
      background: rgba(255, 250, 238, 0.92);
      color: #59472b;
      line-height: 1.6;
    }

    .treatment-note strong {
      color: var(--blue-900);
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 520ms ease, transform 520ms ease;
      transition-delay: var(--delay, 0ms);
    }

    .reveal.is-visible {
      opacity: 1;
      transform: translateY(0);
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      overflow: hidden;
    }

    .faq-item summary {
      cursor: pointer;
      list-style: none;
      padding: 18px 20px;
      color: var(--blue-900);
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      gap: 16px;
    }

    .faq-item summary::-webkit-details-marker { display: none; }

    .faq-item summary::after {
      content: "+";
      color: var(--blue-700);
      font-size: 22px;
      line-height: 1;
    }

    .faq-item[open] summary::after { content: "-"; }

    .faq-item p {
      padding: 0 20px 18px;
      color: #405466;
      margin-bottom: 0;
    }

    .faq-item[open] p {
      animation: faqSlide 220ms ease;
    }

    .faq-item summary::after {
      transition: transform 180ms ease;
    }

    .faq-item[open] summary::after {
      transform: rotate(180deg);
    }

    @keyframes faqSlide {
      from { opacity: 0; transform: translateY(-6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .cta {
      background: linear-gradient(135deg, var(--blue-900), var(--green-600));
      color: var(--white);
      padding: 54px 0;
    }

    .cta h2 {
      color: var(--white);
      font-size: 32px;
      line-height: 1.25;
      margin-bottom: 10px;
    }

    .cta p {
      color: rgba(255, 255, 255, 0.85);
      max-width: 760px;
      margin-bottom: 0;
    }

    .footer {
      background: var(--blue-950);
      color: rgba(255, 255, 255, 0.76);
      padding: 34px 0;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 1fr;
      gap: 24px;
    }

    .footer strong {
      color: var(--white);
      display: block;
      margin-bottom: 8px;
    }
    @media (max-width: 940px) {
      .header-inner { position: relative; }
      .menu-toggle { display: inline-flex; }

      .nav {
        position: absolute;
        top: calc(100% + 1px);
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px;
        background: var(--white);
        border: 1px solid var(--line);
        border-top: 0;
        border-radius: 0 0 14px 14px;
        box-shadow: 0 18px 36px rgba(15, 63, 102, 0.13);
        white-space: normal;
      }

      .header.menu-open .nav { display: flex; }

      .nav > a,
      .nav summary {
        min-height: 46px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 10px;
        border-radius: 8px;
        font-size: 16px;
      }

      .nav > a:hover,
      .nav summary:hover { background: var(--blue-50); }

      .nav-dropdown {
        position: static;
        min-width: 0;
        box-shadow: none;
        border: 0;
        border-left: 2px solid var(--line);
        border-radius: 0;
        margin: 2px 0 8px 14px;
        padding: 4px 0 4px 10px;
      }

      .nav-item:hover .nav-dropdown { display: none; }
      .nav-item[open] .nav-dropdown { display: grid; }

      .hero-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .grid-4,
      .grid-3,
      .timeline,
      .symptom-summary-grid,
      .risk-matrix,
      .treatment-flow {
        grid-template-columns: repeat(2, 1fr);
      }

      .treatment-flow .flow-card,
      .treatment-flow .flow-card:nth-child(4),
      .treatment-flow .flow-card:nth-child(5) {
        grid-column: auto;
      }

      .hero-roadmap ol { grid-template-columns: repeat(2, 1fr); }
      .hero-roadmap ol::before { display: none; }

      .timeline::before,
      .timeline::after,
      .treatment-flow::before,
      .treatment-flow::after { display: none; }

      .treatment-path {
        grid-template-columns: 1fr;
      }

      .treatment-tabs {
        position: relative;
        top: auto;
      }

      .treatment-tab-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: 10px;
        overflow: visible;
        padding: 0;
      }

      .treatment-tab {
        min-width: 0;
        max-width: 100%;
      }

      .treatment-panel h3 {
        font-size: 26px;
      }

      .treatment-detail-grid,
      .treatment-link-grid {
        grid-template-columns: 1fr;
      }

      .stage-next {
        align-items: stretch;
        flex-direction: column;
      }

      .stage-next .button {
        justify-content: center;
        width: 100%;
      }
    }

    @media (max-width: 640px) {
      .topbar { display: none; }
      .brand { min-width: 0; }
      .brand-logo { width: 38px; height: 38px; }
      .brand strong { font-size: 16px; }
      .header .button-primary { display: none; }

      .hero { padding: 44px 0 38px; }
      h1 { font-size: 34px; }
      .hero-subtitle { font-size: 18px; }
      .lead { font-size: 16px; }
      section { padding: 44px 0; }

      .section-head { display: block; }
      .section-head h2,
      .cta h2 { font-size: 26px; }

      .grid-4,
      .grid-3,
      .grid-2,
      .timeline,
      .symptom-summary-grid,
      .risk-matrix,
      .treatment-flow,
      .checklist {
        grid-template-columns: 1fr;
      }

      .hero-roadmap ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .hero-roadmap li { min-height: 0; }
      .hero-image img { min-height: 280px; }

      .treatment-path {
        gap: 16px;
      }

      .treatment-tabs {
        padding: 14px 0 10px;
        border: 0;
        background: transparent;
        box-shadow: none;
      }

      .treatment-tabs h3 {
        padding: 0 2px;
        margin-bottom: 10px;
      }

      .treatment-tab {
        min-width: 0;
        width: 100%;
        padding: 11px;
        background: rgba(255, 255, 255, 0.82);
        border-color: rgba(73, 167, 216, 0.2);
      }

      .treatment-panel {
        padding: 18px;
        border-radius: 18px;
      }

      .treatment-panel h3 {
        font-size: 23px;
      }

      .treatment-panel-head p {
        font-size: 15px;
      }

      .treatment-detail-card,
      .treatment-links {
        padding: 15px;
      }

      .treatment-link-card {
        min-height: 0;
      }
    }

    @media (max-width: 767px) {
      html,
      body {
        max-width: 100%;
      }

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

      img,
      svg,
      video {
        max-width: 100%;
        height: auto;
      }

      .container,
      .section-container,
      .page-container {
        width: 100%;
        max-width: 100%;
        padding-left: 20px;
        padding-right: 20px;
      }

      .grid,
      .cards-grid,
      .treatment-grid,
      .related-grid {
        grid-template-columns: 1fr;
      }

      .card,
      .section-card,
      .treatment-card,
      .related-card,
      .small-card,
      .flow-card,
      .stage-card,
      .treatment-panel,
      .treatment-tabs,
      .treatment-tab,
      .treatment-link-card,
      .risk-panel,
      .risk-note {
        min-width: 0;
        max-width: 100%;
      }

      .risk-panel {
        padding: 18px 20px;
        border-radius: 16px;
      }

      .risk-panel-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
        margin-bottom: 12px;
      }

      .risk-title-wrap {
        align-items: flex-start;
      }

      .risk-icon {
        width: 30px;
        height: 30px;
        border-radius: 10px;
      }

      .risk-item {
        padding: 14px 0;
      }

      .risk-item:hover {
        padding-left: 0;
        padding-right: 0;
        background: transparent;
        transform: none;
      }

      .risk-note {
        padding: 18px 20px;
        border-radius: 16px;
      }

      .hero-actions,
      .cta-actions {
        align-items: stretch;
        flex-direction: column;
      }

      .hero-actions .button,
      .cta-actions .button {
        width: 100%;
      }

      .care-card {
        padding: 16px 18px;
      }

      .care-card .card-header {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 8px;
      }

      .care-card .card-icon {
        width: 34px;
        height: 34px;
        flex: 0 0 34px;
        margin: 0;
      }

      .care-card h3 {
        margin: 0;
      }

      .care-card p {
        margin: 10px 0 0;
        font-size: 13.5px;
        line-height: 1.5;
      }

      .symptom-card {
        padding: 18px 20px;
      }

      .symptom-card .card-header {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 10px;
      }

      .symptom-card .card-icon {
        flex: 0 0 auto;
        margin: 0;
      }

      .symptom-card h3 {
        margin: 0;
      }

      .symptom-card p {
        margin: 8px 0 0;
      }

      .symptom-card ul {
        margin: 10px 0 0;
        padding-left: 18px;
      }

      #related-grid .small-card {
        min-height: 0;
        padding: 16px 18px;
      }

      #related-grid .small-card h3 {
        margin-bottom: 8px;
      }

      #related-grid .small-card .card-link {
        margin-top: 0;
        font-size: 13.5px;
      }

      .hero-roadmap {
        margin-top: 22px;
      }

      .hero-roadmap ol {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
      }

      .hero-roadmap li {
        min-height: 56px;
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 12px 14px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.94);
        box-shadow: 0 8px 20px rgba(15, 63, 102, 0.05);
      }

      .hero-roadmap li::before {
        width: 12px;
        height: 12px;
        flex: 0 0 12px;
        margin: 0;
        box-shadow: none;
        animation: none;
      }

      .hero-roadmap li::after {
        display: none;
      }

      .hero-roadmap li:hover {
        transform: none;
        box-shadow: 0 8px 20px rgba(15, 63, 102, 0.05);
      }

      .hero-roadmap li:hover::before {
        transform: none;
        box-shadow: none;
      }

      .hero-roadmap li:last-child {
        grid-column: auto;
      }

      .treatment-path {
        display: block;
      }

      .treatment-tabs,
      #treatment-panel {
        display: none;
      }

      .treatment-accordion {
        display: grid;
        gap: 12px;
        width: 100%;
        max-width: 100%;
      }

      .treatment-accordion-item {
        overflow: hidden;
        border: 1px solid rgba(73, 167, 216, 0.24);
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: 0 12px 28px rgba(15, 63, 102, 0.06);
      }

      .treatment-accordion-item summary {
        position: relative;
        display: grid;
        grid-template-columns: auto minmax(0, 1fr);
        gap: 12px;
        align-items: center;
        padding: 12px;
        color: var(--text);
        cursor: pointer;
        list-style: none;
      }

      .treatment-accordion-item summary::-webkit-details-marker {
        display: none;
      }

      .treatment-accordion-item summary::after {
        content: "";
        position: absolute;
        right: 16px;
        width: 9px;
        height: 9px;
        border-right: 2px solid var(--blue-700);
        border-bottom: 2px solid var(--blue-700);
        transform: rotate(45deg);
        transition: transform 180ms ease;
      }

      .treatment-accordion-item[open] summary::after {
        transform: rotate(-135deg);
      }

      .treatment-accordion-item summary strong {
        display: block;
        color: var(--blue-900);
        font-size: 15px;
        line-height: 1.35;
        padding-right: 24px;
      }

      .treatment-accordion-item summary span span {
        display: block;
        color: var(--muted);
        font-size: 13px;
        line-height: 1.35;
        margin-top: 3px;
        padding-right: 24px;
      }

      .treatment-accordion-panel {
        display: grid;
        gap: 16px;
        padding: 0 12px 14px;
      }

      .treatment-accordion-panel .treatment-panel-head,
      .treatment-accordion-panel .treatment-detail-grid,
      .treatment-accordion-panel .treatment-links {
        margin-bottom: 0;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
      }

      .reveal {
        opacity: 1;
        transform: none;
      }
    }