:root {
  --ink: #172322;
  --ink-soft: #40504e;
  --paper: #f6f7f2;
  --surface: #ffffff;
  --teal: #116b64;
  --teal-dark: #0b514c;
  --blue: #245ca6;
  --coral: #b94536;
  --gold: #b17c18;
  --mint: #dcebe5;
  --sky: #e1ebf6;
  --peach: #f7e2dc;
  --line: #d9dfda;
  --shadow: 0 16px 45px rgba(28, 49, 46, .08);
  --shell: min(1180px, calc(100% - 40px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif; font-size: 16px; line-height: 1.75; }
a { color: inherit; }
img { max-width: 100%; display: block; }
button, input { font: inherit; }
button, a, input, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #e19b2d; outline-offset: 3px; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; left: 12px; top: 12px; padding: 10px 14px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid rgba(217,223,218,.92); background: rgba(246,247,242,.94); backdrop-filter: blur(14px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand strong { display: block; font-size: 17px; line-height: 1.25; }
.brand small { display: block; color: var(--ink-soft); font-size: 11px; line-height: 1.5; }
.brand-mark { width: 36px; height: 36px; display: grid; align-content: center; gap: 4px; padding: 7px; border-radius: 5px; background: var(--teal); transform: rotate(-4deg); box-shadow: 4px 4px 0 #a9cdc2; }
.brand-mark i { display: block; height: 2px; background: white; position: relative; }
.brand-mark i::before, .brand-mark i::after { content: ""; position: absolute; width: 2px; height: 7px; top: -2px; background: white; }
.brand-mark i::before { left: 3px; }.brand-mark i::after { right: 3px; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-weight: 650; font-size: 14px; }
.site-nav a:hover { color: var(--teal); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
.home-hero { min-height: min(720px, calc(100vh - 76px)); display: flex; align-items: center; overflow: hidden; border-bottom: 1px solid var(--line); background: #eef1eb; }
.hero-grid { display: grid; grid-template-columns: minmax(0, .87fr) minmax(420px, 1.13fr); align-items: center; gap: clamp(36px, 7vw, 96px); padding-block: 64px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--teal-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--teal); }
.hero-copy h1 { margin: 20px 0 22px; max-width: 650px; font-family: "Songti SC", "STSong", serif; font-size: clamp(44px, 5vw, 74px); line-height: 1.08; letter-spacing: 0; font-weight: 700; }
.hero-copy h1 em { color: var(--teal); font-style: normal; }
.hero-copy > p { max-width: 570px; margin: 0; color: var(--ink-soft); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 19px; border: 1px solid var(--ink); border-radius: 4px; text-decoration: none; font-weight: 750; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--ink); color: white; }.button-primary:hover { background: var(--teal-dark); }
.button-secondary { background: transparent; color: var(--ink); }.button-secondary:hover { background: white; }
.hero-stats { display: flex; gap: 28px; margin: 36px 0 0; }
.hero-stats div { min-width: 72px; }.hero-stats dt { font-family: Georgia, serif; font-size: 30px; line-height: 1; font-weight: 700; }.hero-stats dd { margin: 7px 0 0; color: var(--ink-soft); font-size: 12px; }
.hero-visual { margin: 0; position: relative; }
.hero-visual::before { content: ""; position: absolute; inset: 20px -80px -24px 80px; z-index: -1; border: 1px solid #b8c9c3; }
.hero-visual img { width: 100%; height: auto; aspect-ratio: 3/2; object-fit: cover; box-shadow: var(--shadow); }
.hero-visual figcaption { position: absolute; left: -22px; bottom: 28px; padding: 13px 16px; background: var(--ink); color: white; font-size: 12px; box-shadow: 8px 8px 0 rgba(17,107,100,.25); }
.hero-visual figcaption span { display: block; color: #9bd2c4; font-weight: 800; }
.simulation-panel { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: center; margin: 48px 0 12px; padding: 30px; border: 1px solid var(--line); border-top: 4px solid var(--teal); background: var(--surface); box-shadow: 0 10px 30px rgba(20,50,45,.06); }
.simulation-intro h2 { margin: 8px 0 8px; font-family: "Songti SC", "STSong", serif; font-size: 25px; line-height: 1.35; }.simulation-intro p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.live-mark { display: inline-flex; align-items: center; gap: 7px; color: var(--teal-dark); font-size: 11px; font-weight: 800; }.live-mark i { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 5px rgba(17,107,100,.12); }
.simulation-data { display: grid; grid-template-columns: 145px 1fr; gap: 18px; align-items: stretch; }.simulation-time { display: flex; flex-direction: column; justify-content: center; padding: 17px; color: white; background: var(--ink); }.simulation-time span, .simulation-data dt { font-size: 10px; font-weight: 750; color: #6e7d79; }.simulation-time span { color: #9fb4ae; }.simulation-time strong { margin: 4px 0; font: 700 24px/1.2 Georgia, serif; }.simulation-time small { color: #b5c5c1; font-size: 10px; }
.simulation-data dl { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 0; }.simulation-data dl div { min-width: 0; padding: 14px 10px; border: 1px solid var(--line); background: #f7f8f4; }.simulation-data dd { margin: 7px 0 0; color: var(--ink); font-weight: 850; font-size: 17px; overflow-wrap: anywhere; }.simulation-data dl div:first-child { grid-column: span 2; }
.category-section, .all-articles, .related { padding-block: 76px; scroll-margin-top: 74px; }
.category-section + .category-section, .all-articles { border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 28px; }
.section-heading span, .section-kicker { color: var(--teal); font-size: 12px; font-weight: 850; text-transform: uppercase; }
.section-heading h2 { margin: 4px 0 0; font-family: "Songti SC", "STSong", serif; font-size: 32px; line-height: 1.25; }
.section-heading p { margin: 8px 0 0; color: var(--ink-soft); }.section-heading > strong, .section-heading-actions > strong { color: transparent; -webkit-text-stroke: 1px #a9b5af; font: 700 60px/1 Georgia, serif; }
.section-heading > a { color: var(--teal-dark); font-weight: 750; text-underline-offset: 4px; }
.section-heading-actions { display: flex; align-items: end; gap: 22px; }.section-heading-actions a { min-height: 44px; display: inline-flex; align-items: center; gap: 7px; color: var(--teal-dark); font-size: 13px; font-weight: 800; text-decoration: none; }.section-heading-actions a span { font-size: 16px; transition: transform .2s ease; }.section-heading-actions a:hover span { transform: translateX(4px); }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.article-card { min-width: 0; display: flex; flex-direction: column; min-height: 285px; padding: 24px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.article-card:hover { transform: translateY(-4px); border-color: #a9bdb7; box-shadow: var(--shadow); }
.card-topline { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #66736f; font-size: 11px; }
.category { display: inline-flex; align-items: center; min-height: 25px; padding: 2px 8px; border-radius: 3px; font-size: 11px; font-weight: 800; }
.category-knowledge { color: #174f86; background: var(--sky); }.category-risk { color: #8e3428; background: var(--peach); }.category-education { color: #285f4b; background: var(--mint); }
.article-card h3 { margin: 20px 0 12px; font-size: 19px; line-height: 1.55; }
.article-card h3 a { text-decoration: none; }.article-card h3 a:hover { color: var(--teal); }
.article-card p { margin: 0 0 22px; color: var(--ink-soft); font-size: 14px; line-height: 1.75; }
.read-link { margin-top: auto; color: var(--teal-dark); font-size: 13px; font-weight: 800; text-decoration: none; }.read-link span { display: inline-block; transition: transform .2s ease; }.read-link:hover span { transform: translateX(4px); }
.search-heading { align-items: center; }
.search-box { width: min(420px, 100%); position: relative; }
.search-box input { width: 100%; min-height: 50px; padding: 12px 48px 12px 16px; border: 1px solid #aebbb6; border-radius: 4px; color: var(--ink); background: white; }
.search-box input::placeholder { color: #74817d; }.search-box > span:last-child { position: absolute; width: 15px; height: 15px; right: 19px; top: 16px; border: 2px solid var(--teal); border-radius: 50%; pointer-events: none; }.search-box > span:last-child::after { content: ""; position: absolute; width: 7px; height: 2px; right: -5px; bottom: -3px; background: var(--teal); transform: rotate(45deg); }
.search-status { margin: -12px 0 20px; color: var(--ink-soft); font-size: 13px; }.empty-state { padding: 50px 20px; border: 1px dashed #aebbb6; text-align: center; background: rgba(255,255,255,.5); }.empty-state p { margin-bottom: 0; color: var(--ink-soft); }
.category-page-shell { max-width: 1180px; }
.category-hero { border-block: 1px solid var(--line); }.category-hero-knowledge { background: #e9eff4; }.category-hero-risk { background: #f5e9e5; }.category-hero-education { background: #e6efe9; }
.category-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr); gap: clamp(42px, 7vw, 96px); align-items: center; min-height: 500px; padding-block: 60px; }
.category-hero h1 { max-width: 720px; margin: 18px 0 20px; font-family: "Songti SC", "STSong", serif; font-size: clamp(42px, 5vw, 64px); line-height: 1.16; letter-spacing: 0; }.category-hero-grid > div > p { max-width: 680px; margin: 0; color: var(--ink-soft); font-size: 18px; line-height: 1.9; }
.category-hero figure { margin: 0; position: relative; }.category-hero figure::before { content: ""; position: absolute; inset: 16px -16px -16px 16px; border: 1px solid rgba(23,35,34,.25); }.category-hero img { position: relative; width: 100%; height: auto; aspect-ratio: 3/2; object-fit: cover; box-shadow: var(--shadow); }
.category-hero-meta { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 30px; }.category-hero-meta span { color: var(--ink-soft); font-size: 12px; }.category-hero-meta strong { margin-right: 6px; color: var(--ink); font: 700 24px/1 Georgia, serif; }
.category-content { max-width: 1100px; }.category-overview { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: clamp(42px, 8vw, 100px); padding-block: 76px; border-bottom: 1px solid var(--line); }.overview-copy h2 { margin: 6px 0 20px; font-family: "Songti SC", "STSong", serif; font-size: 32px; line-height: 1.3; }.overview-copy p { margin: 0 0 16px; color: var(--ink-soft); }
.reading-path { margin: 0; padding: 0; list-style: none; border-top: 1px solid #bfcac5; }.reading-path li { display: grid; grid-template-columns: 54px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid #bfcac5; }.reading-path li > span { color: var(--teal); font: 700 22px/1.4 Georgia, serif; }.reading-path h3 { margin: 0 0 5px; font-size: 16px; }.reading-path p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.category-articles { padding-block: 76px; }.category-faq { max-width: 800px; margin: 0 auto 76px; }.category-faq > h2 { margin: 5px 0 20px; font-family: "Songti SC", "STSong", serif; font-size: 28px; }
.other-categories { display: grid; grid-template-columns: .8fr 1fr 1fr; gap: 0; margin-bottom: 76px; border-block: 1px solid var(--line); }.other-categories > div { padding: 26px 24px 26px 0; }.other-categories h2 { margin: 5px 0 0; font-family: "Songti SC", "STSong", serif; font-size: 24px; }.other-categories > a { display: flex; flex-direction: column; justify-content: center; min-height: 130px; padding: 24px; border-left: 1px solid var(--line); text-decoration: none; transition: background .2s ease; }.other-categories > a:hover { background: white; }.other-categories > a span { margin-bottom: 6px; color: var(--teal); font-size: 12px; font-weight: 800; }.other-categories > a strong { font-size: 14px; line-height: 1.7; }
.article-shell { max-width: 1060px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; padding: 24px 0; color: #60706d; font-size: 13px; }.breadcrumb a { color: var(--teal-dark); text-underline-offset: 3px; }
.article-layout { max-width: 800px; margin-inline: auto; }
.article-header { padding: 48px 0 36px; border-bottom: 1px solid var(--line); }
.article-header h1 { margin: 18px 0 22px; font-family: "Songti SC", "STSong", serif; font-size: clamp(36px, 5vw, 58px); line-height: 1.2; letter-spacing: 0; }
.article-summary { margin: 0; color: var(--ink-soft); font-size: 18px; line-height: 1.9; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 24px; color: #6b7774; font-size: 12px; }
.notice { margin: 30px 0 0; padding: 20px 22px; border-left: 4px solid; background: white; }.notice strong { font-size: 14px; }.notice p { margin: 5px 0 0; color: var(--ink-soft); font-size: 14px; }.notice-risk { border-color: var(--coral); }.notice-education { border-color: var(--teal); }
.article-body { padding: 10px 0 30px; }
.article-section { padding-top: 44px; scroll-margin-top: 86px; }.article-section h2 { margin: 0 0 18px; font-family: "Songti SC", "STSong", serif; font-size: 28px; line-height: 1.35; }.article-section p { margin: 0 0 19px; color: #293936; font-size: 17px; line-height: 2; }
.faq-section { margin-top: 16px; padding: 38px 28px 28px; border: 1px solid var(--line); background: #edf1eb; }.faq-section > h2 { margin-top: 4px; }
.faq-list details { border-top: 1px solid #cbd5d0; }.faq-list details:last-child { border-bottom: 1px solid #cbd5d0; }
.faq-list summary { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 2px; cursor: pointer; font-weight: 750; list-style: none; }.faq-list summary::-webkit-details-marker { display: none; }.faq-list summary span { position: relative; flex: 0 0 22px; height: 22px; }.faq-list summary span::before, .faq-list summary span::after { content: ""; position: absolute; top: 10px; left: 4px; width: 14px; height: 2px; background: var(--teal); transition: transform .2s ease; }.faq-list summary span::after { transform: rotate(90deg); }.faq-list details[open] summary span::after { transform: rotate(0); }.faq-list details div { padding: 0 34px 14px 2px; }.faq-list details p { margin: 0; font-size: 15px; }
.conclusion { margin-top: 48px; padding: 28px; border-top: 4px solid var(--teal); background: white; box-shadow: 0 10px 35px rgba(20,50,45,.05); }.conclusion h2 { font-size: 24px; }.conclusion p:last-child { margin-bottom: 0; }
.related { max-width: 1060px; margin-inline: auto; border-top: 1px solid var(--line); }.related-grid .article-card { min-height: 270px; }
.site-footer { margin-top: 30px; padding-top: 54px; color: #dae4e1; background: #152522; }
.footer-grid { display: grid; grid-template-columns: 1.1fr .7fr 1fr; gap: 64px; padding-bottom: 42px; }.footer-brand { color: white; font-family: "Songti SC", "STSong", serif; font-size: 22px; font-weight: 700; text-decoration: none; }.footer-grid h2 { margin: 0 0 13px; color: white; font-size: 14px; }.footer-grid p, .footer-grid li { color: #aebdb9; font-size: 13px; }.footer-grid ul { margin: 0; padding: 0; list-style: none; }.footer-grid li { margin: 7px 0; }.footer-grid a:hover { color: white; }.copyright { padding: 18px 0 24px; border-top: 1px solid #31403d; color: #879793; font-size: 11px; }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; padding-block: 52px; }.hero-copy { max-width: 700px; }.hero-visual { width: min(720px, 100%); }.hero-visual::before { right: -30px; }
  .category-hero-grid { grid-template-columns: 1fr; }.category-hero figure { width: min(650px, 100%); }.category-overview { grid-template-columns: 1fr; }.other-categories { grid-template-columns: 1fr 1fr; }.other-categories > div { grid-column: 1/-1; }.other-categories > a:first-of-type { border-left: 0; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }.footer-grid { grid-template-columns: 1fr 1fr; }.footer-grid > div:first-child { grid-column: 1/-1; }
}
@media (max-width: 680px) {
  :root { --shell: min(100% - 28px, 1180px); }
  .header-inner { min-height: 66px; }.site-nav { position: absolute; top: 66px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 14px 18px; border-bottom: 1px solid var(--line); background: var(--paper); }.site-nav.is-open { display: flex; }.site-nav a { min-height: 48px; display: flex; align-items: center; padding: 0 10px; border-bottom: 1px solid var(--line); }.nav-toggle { display: block; }.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .home-hero { min-height: auto; }.hero-grid { grid-template-columns: minmax(0, 1fr); gap: 42px; padding-block: 44px 60px; }.hero-copy h1 { font-size: 42px; }.hero-copy > p { font-size: 16px; }.hero-actions { display: grid; grid-template-columns: 1fr; }.hero-stats { justify-content: space-between; gap: 12px; }.hero-visual figcaption { left: 12px; bottom: -20px; }.hero-visual::before { inset: 16px -12px -16px 40px; }
  .simulation-panel { grid-template-columns: 1fr; gap: 22px; margin-top: 48px; padding: 22px 18px; }.simulation-data { grid-template-columns: 1fr; }.simulation-time { min-height: 94px; }.simulation-data dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }.simulation-data dl div:first-child { grid-column: span 2; }.category-section, .all-articles, .related { padding-block: 56px; }.section-heading { align-items: start; }.section-heading > strong, .section-heading-actions > strong { font-size: 46px; }.section-heading-actions { align-items: center; gap: 12px; }.section-heading-actions a { min-width: 88px; justify-content: flex-end; }.section-heading h2 { font-size: 28px; }.card-grid { grid-template-columns: 1fr; }.article-card { min-height: 0; }.search-heading { display: grid; }.search-box { margin-top: 8px; }
  .category-hero-grid { min-height: 0; padding-block: 44px 58px; gap: 40px; }.category-hero h1 { font-size: 38px; }.category-hero-grid > div > p { font-size: 16px; }.category-hero figure::before { inset: 10px -8px -10px 18px; }.category-overview, .category-articles { padding-block: 56px; }.overview-copy h2 { font-size: 27px; }.reading-path li { grid-template-columns: 44px 1fr; gap: 10px; }.category-faq { margin-bottom: 56px; }.other-categories { grid-template-columns: 1fr; margin-bottom: 56px; }.other-categories > div { grid-column: auto; }.other-categories > a, .other-categories > a:first-of-type { min-height: 110px; border-left: 0; border-top: 1px solid var(--line); }
  .article-header { padding-top: 32px; }.article-header h1 { font-size: 36px; }.article-summary { font-size: 16px; }.article-section { padding-top: 36px; }.article-section h2 { font-size: 25px; }.article-section p { font-size: 16px; line-height: 1.9; }.faq-section { margin-inline: -6px; padding: 28px 18px 20px; }.conclusion { padding: 22px; }.related .section-heading { align-items: end; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }.footer-grid > div:first-child { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; } }