* , *::before, *::after { box-sizing: border-box; }
:root {
  color-scheme: light;
  --blue:#1453A6; --deep:#102B52; --pale-blue:#EAF3FF; --red:#C62835;
  --pale-red:#FCECEF; --yellow:#F2C94C; --pale-yellow:#FFF5CE;
  --canvas:#F7FAFE; --white:#FFFFFF; --title:#17243A; --text:#29364B;
  --muted:#566477; --line:#D9E3EF; --focus:#0A66C2;
}
html { scroll-behavior:smooth; }
body { margin:0; background:var(--canvas); color:var(--text); font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; font-size:16px; line-height:1.8; overflow-wrap:break-word; }
img,svg,video,canvas { max-width:100%; }
a { color:var(--blue); text-decoration-thickness:1px; text-underline-offset:3px; overflow-wrap:anywhere; }
a:hover { color:var(--red); }
a:focus-visible, button:focus-visible { outline:3px solid var(--focus); outline-offset:3px; border-radius:5px; }
button { font:inherit; }
.skip-link { position:absolute; left:12px; top:8px; z-index:1000; padding:8px 12px; background:#fff; color:var(--deep); transform:translateY(-150%); border:1px solid var(--line); }
.skip-link:focus { transform:translateY(0); }
.site-header { position:relative; z-index:20; background:var(--white); border-bottom:1px solid var(--line); }
.header-inner { width:100%; max-width:1200px; min-height:76px; margin-inline:auto; padding:10px 30px; display:flex; align-items:center; gap:22px; min-width:0; }
.brand { display:flex; align-items:center; gap:10px; flex:0 1 250px; min-width:0; color:var(--deep); text-decoration:none; }
.brand-logo { display:block; width:auto; height:auto; max-width:175px; max-height:36px; object-fit:contain; }
.brand-word { font-size:25px; line-height:1.1; font-weight:800; letter-spacing:-1px; color:var(--blue); white-space:nowrap; }
.brand-word b { color:var(--deep); }
.brand-tagline { color:var(--muted); font-size:12px; line-height:1.35; }
.primary-nav { display:flex; align-items:center; justify-content:center; gap:clamp(10px,1.4vw,20px); flex:1 1 auto; min-width:0; }
.primary-nav a,.route-link { min-height:44px; display:inline-flex; align-items:center; padding:6px 2px; color:var(--text); font-size:14px; font-weight:650; text-decoration:none; white-space:normal; }
.primary-nav a[aria-current="page"],.route-link[aria-current="page"] { color:var(--blue); border-bottom:2px solid var(--red); }
.header-actions { display:flex; align-items:center; gap:14px; flex:0 0 auto; }
.explore-button,.menu-toggle { min-height:44px; padding:8px 14px; border:1px solid var(--blue); border-radius:8px; color:#fff; background:var(--blue); font-weight:650; cursor:pointer; }
.explore-button:hover,.menu-toggle:hover { background:var(--deep); }
.mobile-actions { display:none; }
.topic-panel { background:#fff; border-bottom:1px solid var(--line); box-shadow:0 10px 24px rgba(16,43,82,.07); }
.topic-panel-inner { max-width:1200px; margin:auto; padding:24px 30px 28px; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px 36px; }
.topic-group { min-width:0; }
.topic-group h2 { margin:0 0 10px; color:var(--deep); font-size:17px; }
.topic-group ul,.footer-group ul { list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px 14px; }
.topic-group a { display:flex; flex-direction:column; gap:1px; min-width:0; min-height:48px; padding:6px 8px; border-radius:7px; text-decoration:none; }
.topic-group a:hover { background:var(--pale-blue); }
.topic-group strong { font-size:14px; color:var(--blue); }
.topic-group span { color:var(--muted); font-size:12px; line-height:1.45; }
.topic-group a[aria-current="page"] { background:var(--pale-blue); outline:1px solid var(--blue); }
.page-shell { width:100%; max-width:1200px; margin-inline:auto; padding:34px 30px 76px; min-width:0; }
.page-intro { max-width:900px; margin:0 auto 26px; }
.breadcrumb { margin:0 0 8px; color:var(--muted); font-size:13px; }
.breadcrumb a { color:var(--muted); }
.kicker { display:inline-block; margin:0 0 7px; color:var(--red); font-size:13px; font-weight:750; letter-spacing:.04em; }
h1,h2,h3 { color:var(--title); line-height:1.35; overflow-wrap:anywhere; }
h1 { margin:0 0 12px; font-size:clamp(27px,3vw,38px); letter-spacing:-.025em; }
.home-page h1 { font-size:clamp(29px,3.3vw,44px); }
.lead { max-width:780px; margin:0; color:#3e4d63; font-size:17px; line-height:1.85; }
.article-index { max-width:780px; margin:22px auto 0; padding:12px 16px; border-left:3px solid var(--yellow); background:var(--pale-yellow); border-radius:0 8px 8px 0; }
.article-index strong { display:block; color:var(--deep); font-size:13px; margin-bottom:5px; }
.article-index ul { display:flex; flex-wrap:wrap; gap:5px 16px; margin:0; padding-left:18px; font-size:13px; }
.article-index a { color:var(--deep); }
.article-body { max-width:780px; margin-inline:auto; min-width:0; }
.article-section { margin:42px 0; min-width:0; scroll-margin-top:24px; }
.article-section h2 { margin:0 0 12px; font-size:clamp(22px,2.2vw,27px); }
.article-section h3 { margin:20px 0 8px; font-size:19px; }
.article-section p { margin:0 0 14px; }
.article-section ul,.article-section ol { padding-left:1.35em; margin:10px 0 16px; }
.article-section li { margin:5px 0; }
.media-frame { width:min(100%,420px); max-width:100%; min-width:0; margin:18px auto; padding:12px; display:flex; align-items:center; justify-content:center; border:1px solid var(--line); border-radius:10px; background:#fff; }
.media-frame img { display:block; width:auto; height:auto; max-width:100%; max-height:260px; object-fit:contain; }
.media-frame.hero-media { width:min(100%,500px); }
.media-frame.hero-media img { max-height:310px; }
.media-frame.vertical-media { width:min(100%,250px); }
.media-frame.vertical-media img { max-height:380px; }
.split { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); align-items:center; gap:28px; min-width:0; }
.split.no-media { grid-template-columns:minmax(0,1fr); }
.split .media-frame { margin:0 auto; }
.split .copy { min-width:0; }
.home-section { margin:58px 0; min-width:0; }
.home-section h2 { margin:0 0 14px; font-size:26px; }
.home-section p { margin:0 0 13px; }
.home-links { display:flex; flex-wrap:wrap; gap:9px 18px; margin-top:14px; }
.home-links a { font-weight:650; }
.hero-home { padding:28px; background:#fff; border:1px solid var(--line); border-radius:14px; }
.hero-home .media-frame { margin:0 auto; }
.entry-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.entry-item { padding:18px 18px 20px; border-right:1px solid var(--line); min-width:0; }
.entry-item:last-child { border-right:0; }
.entry-number { color:var(--red); font-weight:800; font-size:13px; }
.entry-item h3 { margin:5px 0 5px; font-size:18px; }
.entry-item p { margin:0; font-size:14px; color:var(--muted); }
.feature-band { padding:26px; background:var(--deep); color:#fff; border-radius:12px; }
.feature-band h2 { color:#fff; }
.feature-band p { color:#edf3fb; }
.feature-band .media-frame { background:#fff; }
.yellow-panel { padding:22px; background:var(--pale-yellow); border:1px solid #eadb9d; border-radius:10px; color:var(--deep); }
.yellow-panel h3 { color:var(--deep); }
.process-row { display:grid; grid-template-columns:repeat(6,minmax(0,1fr)); gap:10px; margin:20px 0; }
.process-step { padding:14px 10px; border-top:3px solid var(--blue); background:#fff; min-width:0; }
.process-step b { display:block; color:var(--red); font-size:13px; }
.process-step span { display:block; color:var(--deep); font-weight:700; font-size:14px; }
.two-feature { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:22px; }
.feature-card { min-width:0; padding:18px; background:#fff; border:1px solid var(--line); border-radius:10px; }
.feature-card .media-frame { margin:0 auto 14px; }
.feature-card h3 { margin:0 0 8px; }
.feature-card p { margin:0 0 10px; }
.path-matrix .article-section:nth-child(even),.workflow .article-section:nth-child(odd) { padding:20px; background:#fff; border:1px solid var(--line); border-radius:10px; }
.archive-grid .article-section { padding:20px; background:#fff; border:1px solid var(--line); border-top:3px solid var(--blue); border-radius:8px; }
.essay-layout .article-section { padding-left:20px; border-left:2px solid var(--line); }
.timeline-layout .article-section { position:relative; padding:0 0 4px 28px; border-left:2px solid #b8cbe2; }
.timeline-layout .article-section::before { content:""; position:absolute; left:-7px; top:7px; width:12px; height:12px; border-radius:50%; background:var(--red); border:2px solid #fff; }
.field-notes .article-section { padding:18px 20px; background:#fff; border-radius:8px; border:1px solid var(--line); }
.field-notes .article-section:nth-child(odd) { margin-left:24px; }
.storyboard .article-section { padding:18px 20px; border-left:4px solid var(--yellow); background:#fff; border-radius:0 8px 8px 0; }
.workflow .article-section { padding:18px 0; border-bottom:1px solid var(--line); }
.evidence-grid .article-section { padding:18px; background:#fff; border:1px solid var(--line); border-radius:9px; }
.evidence-grid .article-section:nth-child(odd) { border-left:4px solid var(--blue); }
.route-list .article-section { padding:20px; background:#fff; border:1px solid var(--line); border-radius:10px; }
.route-list .article-section h2::before { content:"路线 · "; color:var(--red); font-size:13px; vertical-align:middle; }
.checklist .article-section { padding:18px 20px; background:#fff; border:1px solid var(--line); border-radius:9px; }
.checklist .article-section h2::before { content:"✓ "; color:var(--blue); }
.index-groups .article-section { padding:18px 0; border-bottom:1px solid var(--line); }
.boundary-grid .article-section { padding:20px; background:#fff; border-radius:10px; border:1px solid var(--line); }
.boundary-grid .article-section:nth-child(even) { background:var(--pale-blue); }
.service-layout .article-section,.policy-layout .article-section,.about-layout .article-section { padding:18px 0; border-bottom:1px solid var(--line); }
.faq-layout .article-section { padding:18px 20px; margin:16px 0; background:#fff; border:1px solid var(--line); border-radius:9px; }
.faq-layout .article-section h2 { font-size:19px; }
.related-links { margin:48px auto 0; max-width:780px; padding:20px; background:var(--pale-blue); border-radius:10px; }
.related-links h2 { margin:0 0 10px; font-size:18px; }
.related-links ul { display:flex; flex-wrap:wrap; gap:8px 20px; margin:0; padding-left:18px; }
.site-footer { background:#fff; border-top:1px solid var(--line); }
.footer-inner { max-width:1200px; margin:auto; padding:38px 30px 24px; }
.footer-brand-block { max-width:420px; margin-bottom:26px; }
.footer-brand { font-size:23px; font-weight:850; color:var(--blue); text-decoration:none; letter-spacing:-.03em; }
.footer-brand-block p { margin:4px 0; color:var(--muted); font-size:14px; }
.footer-groups { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:24px; }
.footer-group { min-width:0; }
.footer-group h2 { margin:0 0 10px; font-size:15px; }
.footer-group ul { grid-template-columns:1fr; gap:3px; }
.footer-group a { color:var(--muted); font-size:13px; text-decoration:none; }
.footer-group a[aria-current="page"] { color:var(--blue); font-weight:750; }
.footer-notes { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; margin:28px 0 18px; padding:16px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.footer-notes p { margin:0; color:var(--muted); font-size:13px; }
.footer-bottom { display:flex; flex-wrap:wrap; align-items:center; gap:10px 20px; color:var(--muted); font-size:12px; }
.footer-bottom a { color:var(--muted); }
.mobile-bottom-nav { display:none; }
@media (max-width:1100px) {
 .header-inner { gap:14px; }
 .brand { flex-basis:190px; }
 .brand-tagline { display:none; }
 .primary-nav { gap:10px; }
 .primary-nav a,.route-link { font-size:13px; }
 .header-actions { gap:9px; }
}
@media (max-width:900px) {
 .header-inner { padding-inline:22px; }
 .primary-nav a:nth-child(2),.primary-nav a:nth-child(4) { display:none; }
 .topic-panel-inner { padding-inline:22px; }
 .page-shell { padding-inline:22px; }
 .footer-inner { padding-inline:22px; }
 .process-row { grid-template-columns:repeat(3,minmax(0,1fr)); }
}
@media (max-width:700px) {
 body { font-size:16px; }
 .header-inner { min-height:64px; padding:8px 16px; justify-content:space-between; gap:8px; }
 .brand { flex:1 1 auto; min-width:0; }
 .brand-logo { max-width:135px; max-height:32px; }
 .brand-word { font-size:23px; }
 .primary-nav,.header-actions { display:none; }
 .mobile-actions { display:flex; align-items:center; gap:8px; flex:0 0 auto; }
 .mobile-route { min-height:44px; display:inline-flex; align-items:center; padding:4px 5px; font-size:13px; font-weight:700; text-decoration:none; }
 .menu-toggle { min-height:42px; padding:6px 12px; }
 .topic-panel-inner { grid-template-columns:minmax(0,1fr); gap:18px; padding:18px 16px 22px; }
 .topic-group ul { grid-template-columns:repeat(2,minmax(0,1fr)); }
 .page-shell { padding:24px 16px 96px; }
 .page-intro { margin-bottom:22px; }
 .lead { font-size:16px; }
 .article-index { margin-top:18px; }
 .article-index ul { display:block; }
 .article-index li { margin:3px 0; }
 .home-page h1 { font-size:31px; }
 h1 { font-size:29px; }
 .home-section { margin:38px 0; }
 .home-section h2 { font-size:23px; }
 .hero-home { padding:18px; }
 .split,.two-feature { grid-template-columns:minmax(0,1fr); gap:18px; }
 .split .media-frame { order:2; }
 .entry-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
 .entry-item { border-bottom:1px solid var(--line); padding:14px 12px; }
 .entry-item:nth-child(2) { border-right:0; }
 .entry-item:nth-child(3),.entry-item:nth-child(4) { border-bottom:0; }
 .process-row { grid-template-columns:repeat(2,minmax(0,1fr)); }
 .feature-band,.yellow-panel { padding:18px; }
 .media-frame { width:min(100%,360px); padding:10px; }
 .media-frame img { max-height:190px; }
 .media-frame.hero-media img { max-height:230px; }
 .media-frame.vertical-media { width:min(100%,210px); }
 .media-frame.vertical-media img { max-height:300px; }
 .field-notes .article-section:nth-child(odd) { margin-left:0; }
 .article-section { margin:32px 0; }
 .footer-inner { padding:28px 16px 90px; }
 .footer-groups { grid-template-columns:repeat(2,minmax(0,1fr)); gap:22px 16px; }
 .footer-notes { grid-template-columns:minmax(0,1fr); gap:8px; }
 .mobile-bottom-nav { position:fixed; z-index:30; inset:auto 0 0; min-height:56px; padding:6px 10px calc(6px + env(safe-area-inset-bottom)); display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:6px; background:rgba(255,255,255,.98); border-top:1px solid var(--line); }
 .mobile-bottom-nav a { min-width:0; min-height:44px; display:flex; align-items:center; justify-content:center; border-radius:7px; color:var(--deep); font-size:13px; font-weight:700; text-decoration:none; }
 .mobile-bottom-nav a[aria-current="page"] { color:var(--blue); background:var(--pale-blue); outline:1px solid #b8cde7; }
}
@media (max-width:380px) {
 .brand-word { font-size:21px; }
 .mobile-route { font-size:12px; }
 .menu-toggle { padding-inline:9px; }
 .topic-group ul { grid-template-columns:minmax(0,1fr); }
 .entry-grid { grid-template-columns:minmax(0,1fr); }
 .entry-item { border-right:0; border-bottom:1px solid var(--line) !important; }
 .entry-item:last-child { border-bottom:0 !important; }
 .process-row { grid-template-columns:minmax(0,1fr); }
}
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } *,*::before,*::after { animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; } }

.observation-pair { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; }
.observation-pair > div { min-width:0; padding:14px; background:#fff; border:1px solid var(--line); border-radius:8px; }
.observation-pair h3 { margin:0 0 6px; font-size:17px; }
.observation-pair p { margin:0; }
.home-media-stack { min-width:0; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:12px; }
.media-frame.brand-mark-media { width:min(100%,80px); padding:8px; }
.media-frame.brand-mark-media img { max-height:56px; }
@media (max-width:700px) { .observation-pair { grid-template-columns:minmax(0,1fr); } }

.path-rows { display:grid; gap:9px; margin:18px 0 6px; }
.path-rows > div { display:grid; grid-template-columns:minmax(100px,.7fr) minmax(0,2fr) minmax(110px,.8fr); align-items:center; gap:12px; padding:12px 14px; background:#fff; border:1px solid var(--line); border-radius:8px; min-width:0; }
.path-rows strong { color:var(--deep); }
.path-rows span { color:var(--text); }
.path-rows em { color:var(--muted); font-size:13px; font-style:normal; }
.term-rail { float:right; width:min(32%,190px); margin:0 0 18px 22px; padding:14px; background:var(--pale-blue); border:1px solid #c9d9ec; border-radius:8px; }
.term-rail h2 { margin:0 0 8px; font-size:17px; }
.term-rail dl { margin:0; }
.term-rail dt { color:var(--blue); font-weight:750; font-size:13px; }
.term-rail dd { margin:0 0 8px; color:var(--muted); font-size:12px; line-height:1.55; }
.before-after,.evidence-ladder { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; margin:16px 0; }
.before-after > div,.evidence-ladder > div { min-width:0; padding:13px; border:1px solid var(--line); border-radius:8px; background:#fff; }
.before-after strong,.evidence-ladder b { display:block; margin-bottom:4px; color:var(--deep); }
.before-after p { margin:0; font-size:14px; }
.evidence-ladder { grid-template-columns:repeat(3,minmax(0,1fr)); }
.evidence-ladder span { display:block; color:var(--muted); font-size:13px; }
.rhythm-track { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:8px; list-style:none; padding:0 !important; }
.rhythm-track li { min-width:0; padding:10px; background:var(--pale-yellow); border-radius:7px; }
.rhythm-track b,.rhythm-track span { display:block; }
.rhythm-track b { color:var(--deep); font-size:13px; }
.rhythm-track span { color:var(--text); font-size:12px; }
.event-checklist { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; padding:0 !important; list-style:none; }
.event-checklist li { min-width:0; padding:10px; background:var(--pale-blue); border-radius:7px; font-size:13px; }
.event-checklist li::before { content:"✓ "; color:var(--blue); font-weight:800; }
.field-annotation { margin:24px 0; padding:12px 16px; display:flex; gap:12px; align-items:flex-start; background:var(--pale-yellow); border-left:3px solid var(--yellow); border-radius:0 8px 8px 0; }
.field-annotation strong { flex:0 0 auto; color:var(--deep); }
.field-annotation span { min-width:0; color:var(--text); font-size:14px; }
@media (max-width:700px) {
 .path-rows > div { grid-template-columns:minmax(0,1fr); gap:3px; }
 .term-rail { float:none; width:100%; margin:0 0 20px; }
 .before-after,.evidence-ladder { grid-template-columns:minmax(0,1fr); }
 .rhythm-track { grid-template-columns:repeat(2,minmax(0,1fr)); }
 .event-checklist { grid-template-columns:minmax(0,1fr); }
 .field-annotation { display:block; }
 .field-annotation strong { display:block; margin-bottom:4px; }
}