:root {
    --blog-bg: #edf3fc;
    --blog-ink: #12233f;
    --blog-ink-soft: #486184;
    --blog-line: rgba(20, 40, 72, 0.14);
    --blog-surface: #ffffff;
    --blog-brand: #1f6fe5;
    --blog-brand-soft: rgba(31, 111, 229, 0.1);
    --blog-accent: #169669;
    --blog-shadow-soft: var(--ui-shadow-card, 0 1px 2px rgba(15, 23, 42, 0.06), 0 10px 28px rgba(15, 23, 42, 0.06));
    --blog-shadow-hero: 0 1px 2px rgba(15, 23, 42, 0.08), 0 14px 30px rgba(15, 23, 42, 0.08);
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    color: var(--blog-ink);
    background:
      radial-gradient(44% 30% at 95% -10%, rgba(58, 153, 255, 0.12), transparent 70%),
      radial-gradient(34% 24% at -8% 4%, rgba(34, 193, 148, 0.1), transparent 68%),
      var(--blog-bg);
    line-height: var(--ui-leading-normal, 1.5);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    max-width: 100%;
    overflow-x: clip;
  }
  a { color: inherit; text-decoration: none; }
  .wrap {
    width: min(1140px, calc(100% - var(--ui-space-7, 32px)));
    margin: 0 auto;
  }
  .main {
    margin: var(--ui-space-6, 24px) auto var(--ui-space-8, 40px);
    display: grid;
    gap: var(--ui-space-4, 16px);
  }
  .card {
    padding: var(--ui-space-5, 20px);
    border: 1px solid #d7e2f1;
    border-radius: var(--ui-radius-lg, 16px);
    box-shadow: var(--blog-shadow-soft);
    background: var(--blog-surface);
    overflow: hidden;
  }
  .breadcrumbs {
    font-size: var(--ui-text-body-sm, 14px);
    color: #4c698f;
    display: flex;
    flex-wrap: wrap;
    gap: var(--ui-space-2, 8px);
    align-items: center;
  }
  .breadcrumbs a {
    color: var(--blog-brand);
    text-decoration: underline;
    text-decoration-color: rgba(31, 111, 229, 0.3);
    text-underline-offset: 3px;
  }
  .article-eyebrow,
  .index-card-eyebrow,
  .related-eyebrow {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 0 var(--ui-space-2, 8px);
    border-radius: 999px;
    border: 1px solid #d7e2f1;
    background: #f6faff;
    color: #4a668c;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin: 0;
  }
  .article-header h1 {
    margin: var(--ui-space-2, 8px) 0 var(--ui-space-2, 8px);
    line-height: var(--ui-leading-tight, 1.16);
    letter-spacing: -0.02em;
    font-size: var(--ui-text-title-xl, clamp(30px, 4vw, 44px));
  }
  .article-header p {
    margin: 0;
    color: var(--blog-ink-soft);
    font-size: var(--ui-text-body, 16px);
    max-width: 66ch;
    line-height: 1.56;
  }
  .meta,
  .card-meta-row {
    margin-top: var(--ui-space-3, 12px);
    display: flex;
    flex-wrap: wrap;
    gap: var(--ui-space-1, 4px);
  }
  .meta span,
  .chip {
    display: inline-flex;
    align-items: center;
    border: 1px solid #d7e2f1;
    border-radius: 999px;
    background: #ffffff;
    padding: 0 var(--ui-space-3, 12px);
    min-height: 30px;
    font-size: 12px;
    font-weight: 650;
    color: #486185;
  }
  .chip.is-status { border-color: rgba(22, 150, 105, 0.25); background: #eefbf5; color: #236f56; }
  .chip.is-info { border-color: rgba(31, 111, 229, 0.25); background: #eff6ff; color: #2c5f95; }
  .chip.is-meta { border-color: #d7e2f1; background: #ffffff; color: #4f6b90; }
  .article-hero {
    margin-top: var(--ui-space-4, 16px);
    border: 1px solid #d7e2f1;
    border-radius: var(--ui-radius-lg, 16px);
    background: #ffffff;
    box-shadow: var(--blog-shadow-soft);
    overflow: hidden;
  }
  .article-hero img {
    display: block;
    width: 100%;
    aspect-ratio: 1200 / 630;
    object-fit: cover;
    height: auto;
  }
  .article-hero figcaption {
    margin: 0;
    padding: var(--ui-space-2, 8px) var(--ui-space-3, 12px);
    color: #4f6b90;
    font-size: var(--ui-text-caption, 12px);
    border-top: 1px solid #d7e2f1;
    background: #f8fbff;
  }
  .quick-takeaways {
    margin-top: var(--ui-space-4, 16px);
    border: 1px solid rgba(22, 150, 105, 0.25);
    border-radius: var(--ui-radius-md, 12px);
    background: linear-gradient(160deg, #f4fff9, #f7fbff);
    padding: var(--ui-space-4, 16px);
    display: grid;
    gap: var(--ui-space-2, 8px);
  }
  .quick-takeaways h2,
  .toc h2,
  .related h2,
  .lang-panel h2 {
    margin: 0;
    font-size: var(--ui-text-title-md, 22px);
    line-height: var(--ui-leading-tight, 1.16);
    letter-spacing: -0.01em;
  }
  .quick-list {
    margin: 0;
    padding-left: var(--ui-space-4, 16px);
    display: grid;
    gap: var(--ui-space-2, 8px);
    color: #31557c;
    font-size: var(--ui-text-body-sm, 14px);
  }
  .toc {
    margin-top: var(--ui-space-4, 16px);
    border: 1px solid rgba(31, 111, 229, 0.24);
    border-radius: var(--ui-radius-md, 12px);
    background: #f6faff;
    padding: var(--ui-space-4, 16px);
  }
  .toc ol {
    margin: var(--ui-space-2, 8px) 0 0;
    padding-left: 18px;
    display: grid;
    gap: 6px;
  }
  .toc a {
    color: #0a62c7;
    text-decoration: underline;
    text-underline-offset: 2px;
    font-size: var(--ui-text-body-sm, 14px);
  }
  .content-section {
    margin-top: var(--ui-space-5, 20px);
    border-top: 1px solid #d7e2f1;
    padding-top: var(--ui-space-4, 16px);
  }
  .content-section h2,
  .faq h2 {
    margin: 0 0 var(--ui-space-2, 8px);
    font-size: var(--ui-text-title-lg, clamp(24px, 3vw, 34px));
    line-height: var(--ui-leading-tight, 1.16);
    letter-spacing: -0.015em;
  }
  .content-section p {
    margin: 0 0 var(--ui-space-3, 12px);
    color: #2f4f79;
    font-size: var(--ui-text-body, 16px);
    line-height: 1.62;
  }
  .content-section ul {
    margin: 0;
    padding-left: var(--ui-space-5, 20px);
    display: grid;
    gap: 6px;
  }
  .content-section li { color: #2d4d77; }
  .faq {
    margin-top: var(--ui-space-4, 16px);
    border-top: 1px solid #d7e2f1;
    padding-top: var(--ui-space-4, 16px);
    display: grid;
    gap: var(--ui-space-3, 12px);
  }
  .faq-item {
    border: 1px solid #d7e2f1;
    border-radius: var(--ui-radius-md, 12px);
    background: #ffffff;
    padding: var(--ui-space-3, 12px);
  }
  .faq-item h3 {
    margin: 0 0 6px;
    font-size: var(--ui-text-body, 16px);
    line-height: 1.35;
  }
  .faq-item p { margin: 0; color: #38597f; font-size: var(--ui-text-body-sm, 14px); }
  .risk {
    margin-top: var(--ui-space-4, 16px);
    border-left: 4px solid var(--blog-brand);
    border: 1px solid rgba(31, 111, 229, 0.22);
    background: #f5faff;
    border-radius: var(--ui-radius-md, 12px);
    padding: var(--ui-space-3, 12px) var(--ui-space-4, 16px);
    color: #365a82;
    font-size: var(--ui-text-body-sm, 14px);
  }
  .related { margin-top: var(--ui-space-4, 16px); display: grid; gap: var(--ui-space-4, 16px); }
  .related-grid {
    display: grid;
    gap: var(--ui-space-4, 16px);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
  .related-card,
  .index-card {
    display: flex;
    flex-direction: column;
    min-height: 0;
    border: 1px solid #d7e2f1;
    border-radius: var(--ui-radius-lg, 16px);
    box-shadow: var(--blog-shadow-soft);
    background: #ffffff;
    overflow: hidden;
    padding: 0;
  }
  .related-thumb,
  .index-card-media {
    width: 100%;
    aspect-ratio: 1200 / 630;
    object-fit: cover;
    display: block;
  }
  .related-body,
  .index-card-body {
    padding: var(--ui-space-4, 16px);
    display: grid;
    gap: var(--ui-space-2, 8px);
  }
  .related-body h3,
  .index-card-title {
    margin: 0;
    color: #193f6a;
    font-size: var(--ui-text-title-md, 22px);
    line-height: var(--ui-leading-tight, 1.16);
    letter-spacing: -0.01em;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
  }
  .related-body h3 a,
  .index-card-title a { color: #193f6a; }
  .related-body h3 a:hover,
  .index-card-title a:hover {
    color: var(--blog-brand);
    text-decoration: underline;
    text-underline-offset: 3px;
  }
  .index-hook,
  .related-summary {
    margin: 0;
    color: #466285;
    line-height: 1.54;
    font-size: var(--ui-text-body-sm, 14px);
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
  }
  .index-feature .index-hook { -webkit-line-clamp: 3; }
  .index-shell {
    background: rgba(248, 251, 255, 0.72);
    border-color: #d9e4f3;
  }
  .index-hero { display: block; }
  .index-feature {
    box-shadow: var(--blog-shadow-hero);
    border-color: #cddcf0;
  }
  .index-feature .index-card-title {
    font-size: var(--ui-text-title-lg, clamp(24px, 3vw, 34px));
    -webkit-line-clamp: 2;
  }
  .index-grid {
    display: grid;
    gap: var(--ui-space-4, 16px);
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    align-items: start;
  }
  .index-foot { display: grid; gap: var(--ui-space-2, 8px); margin-top: var(--ui-space-1, 4px); }
  .index-meta,
  .related-meta { display: flex; flex-wrap: wrap; gap: var(--ui-space-1, 4px); }
  .index-actions,
  .related-actions,
  .card-actions {
    display: flex;
    align-items: center;
    gap: var(--ui-space-2, 8px);
    flex-wrap: wrap;
  }
  .index-read,
  .index-next {
    min-height: var(--ui-control-h-sm, 40px);
    padding: 0 var(--ui-space-3, 12px);
    font-size: 13px;
    min-width: 138px;
  }
  .cta {
    margin-top: var(--ui-space-4, 16px);
    border-radius: var(--ui-radius-lg, 16px);
    border: 1px solid rgba(22, 150, 105, 0.26);
    background: linear-gradient(145deg, #f4fff9, #f4faff);
    padding: var(--ui-space-4, 16px);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--ui-space-3, 12px);
  }
  .cta strong {
    display: block;
    margin-bottom: 4px;
    font-size: var(--ui-text-title-md, 22px);
    line-height: var(--ui-leading-tight, 1.16);
    letter-spacing: -0.01em;
  }
  .cta p {
    margin: 0;
    color: #3d628d;
    font-size: var(--ui-text-body-sm, 14px);
    max-width: 68ch;
  }
  .lang-panel {
    margin-top: var(--ui-space-4, 16px);
    border-top: 1px solid #d7e2f1;
    padding-top: var(--ui-space-4, 16px);
  }
  .lang-panel p {
    margin: var(--ui-space-2, 8px) 0 var(--ui-space-3, 12px);
    color: #486385;
    font-size: var(--ui-text-body-sm, 14px);
  }
  .lang-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--ui-space-2, 8px);
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--ui-control-h-md, 44px);
    border-radius: var(--ui-radius-md, 12px);
    padding: var(--ui-space-0, 0px) var(--ui-space-4, 16px);
    font-size: var(--ui-text-body-sm, 14px);
    font-weight: 700;
    color: #fff;
    background: linear-gradient(140deg, #1d79f0 0%, #2f8fff 60%, #3ca8ff 100%);
    border: 1px solid #1d79f0;
    box-shadow: 0 8px 18px rgba(31, 111, 229, 0.2);
  }
  .btn.btn-alt {
    color: #284b78;
    background: #ffffff;
    border: 1px solid #cad8ea;
    box-shadow: none;
  }
  .btn.btn-subtle {
    color: #4b668d;
    background: transparent;
    border: 1px solid transparent;
    box-shadow: none;
    text-decoration: underline;
    text-decoration-color: rgba(75, 103, 143, 0.35);
    text-underline-offset: 3px;
  }
  .footer {
    margin: 6px 0 30px;
    color: #57739a;
    font-size: var(--ui-text-caption, 12px);
  }
  @media (max-width: 900px) {
    .wrap { width: calc(100% - 24px); }
    .card { padding: var(--ui-space-4, 16px); }
    .related-grid { grid-template-columns: 1fr; }
  }
  @media (max-width: 760px) {
    .main { margin-top: 16px; gap: 12px; }
    .card { padding: 14px; border-radius: 14px; }
    .article-header h1 { font-size: clamp(32px, 9vw, 44px); line-height: 1.08; }
    .article-header p { font-size: var(--ui-text-body-sm, 14px); }
    .index-feature .index-card-title,
    .index-card-title,
    .related-body h3 { font-size: clamp(24px, 7.2vw, 30px); }
    .index-actions,
    .card-actions { width: 100%; }
    .index-read,
    .index-next,
    .btn { width: 100%; min-width: 0; }
    .related-actions .btn { width: auto; }
    .cta { flex-direction: column; align-items: flex-start; }
  }