:root{
  --bg:#0C0B0A;--bg-deep:#161311;--surface:#1C1916;--surface-2:#26221D;--paper:#F3E6D2;
  --title:#FFF8F0;--text:#EDE4D8;--muted:#B7A898;--soft:#8A7B6C;--red:#E11D2E;--red-hi:#FF4A4F;
  --wine:#8B1E2D;--rust:#E25A2A;--amber:#E2B14A;--border:rgba(226,177,74,.16);--border-strong:rgba(225,29,46,.40);
  --shadow:0 18px 44px rgba(0,0,0,.46);--footer:#080706;--footer-text:#D8CBBA;--radius:8px;--max:1280px;
}
*{box-sizing:border-box;min-width:0}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden}
a{color:inherit;text-decoration:none}
a:hover{color:var(--title)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--red-hi);outline-offset:3px}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit}
button{cursor:pointer}
p,h1,h2,h3,h4,ul,ol,figure{margin-top:0}
.skip-link{position:absolute;left:16px;top:-80px;z-index:50;background:var(--paper);color:#231b15;padding:10px 14px;border-radius:6px}
.skip-link:focus{top:12px}
.site-header{border-bottom:1px solid var(--border);background:var(--bg-deep)}
.header-inner{max-width:var(--max);margin:0 auto;min-height:80px;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:12px;min-height:44px}
.brand-logo{height:34px;width:auto;object-fit:contain}
.brand-text{font-weight:800;color:var(--title);font-size:22px;letter-spacing:.04em}
.brand-en{color:var(--muted);font-size:12px;letter-spacing:.14em;white-space:nowrap}
.header-links{display:flex;gap:10px;align-items:center}
.header-links a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:1px solid var(--border);border-radius:6px;color:var(--paper)}
.header-links a:hover{border-color:var(--border-strong);background:rgba(225,29,46,.08)}
.tool-zone{background:var(--bg);border-bottom:1px solid var(--border)}
.tool-zone-inner{max-width:var(--max);margin:0 auto;padding:10px 24px;display:flex;justify-content:flex-end;gap:12px;align-items:flex-start}
.site-tool{width:min(100%,760px)}
.directory-tool{display:none}
.site-tool>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;padding:9px 14px;background:var(--surface);border:1px solid var(--border);border-radius:6px;color:var(--paper);font-weight:700;cursor:pointer}
.site-tool>summary::-webkit-details-marker{display:none}
.site-tool[open]>summary{border-color:var(--border-strong);border-bottom-left-radius:0;border-bottom-right-radius:0}
.summary-state::before{content:"＋";font-size:18px;color:var(--red-hi)}
.site-tool[open] .summary-state::before{content:"－"}
.tool-panel{background:var(--surface);border:1px solid var(--border-strong);border-top:0;border-radius:0 0 8px 8px;padding:18px;margin-bottom:4px;box-shadow:var(--shadow)}
.directory-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.directory-group h2{font-size:14px;color:var(--amber);margin:0 0 8px;letter-spacing:.08em}
.directory-group a{display:block;padding:10px 0;border-top:1px solid var(--border)}
.directory-group a strong{display:block;color:var(--title);font-size:15px}
.directory-group a span{display:block;color:var(--muted);font-size:13px;line-height:1.6;margin-top:2px}
.directory-group a[aria-current="page"]{padding-left:10px;border-left:3px solid var(--red);background:rgba(225,29,46,.08)}
.tool-close{min-height:44px;margin-top:16px;border:1px solid var(--border);border-radius:6px;background:var(--surface-2);color:var(--paper);padding:8px 14px}
.site-search-form label{display:block;font-weight:700;color:var(--title);margin-bottom:8px}
.search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}
.search-row input{min-height:44px;width:100%;border:1px solid var(--border);border-radius:6px;background:#100e0c;color:var(--text);padding:8px 12px}
.search-row button{min-height:44px;padding:8px 14px;border:1px solid var(--border);border-radius:6px;background:var(--paper);color:#2b211a;font-weight:700}
.search-hint{color:var(--muted);font-size:13px;margin:10px 0 8px}
.search-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.search-result-item{padding:10px 12px;border:1px solid var(--border);border-radius:6px;background:var(--bg-deep)}
.search-result-item strong{display:block;color:var(--title)}
.search-result-item span{display:block;color:var(--muted);font-size:13px;line-height:1.55}
.search-result-item[hidden]{display:none}
.search-empty{grid-column:1/-1;margin:8px 0 0;color:var(--paper);padding:12px;background:var(--surface-2);border-left:3px solid var(--red)}
.site-frame{max-width:var(--max);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:196px minmax(0,1fr);gap:24px;align-items:start}
.desktop-sidebar{padding:32px 0 48px}
.desktop-sidebar-inner{display:block}
.sidebar-group{margin-bottom:22px}
.sidebar-group h2{font-size:12px;color:var(--soft);letter-spacing:.12em;margin:0 0 7px;text-transform:uppercase}
.sidebar-group a{position:relative;display:flex;align-items:center;min-height:44px;padding:8px 10px 8px 14px;color:var(--muted);border-radius:5px}
.sidebar-group a::before{content:"";position:absolute;left:0;width:4px;height:0;border-radius:4px;background:var(--red);transition:height .16s ease}
.sidebar-group a:hover{background:var(--surface);color:var(--paper)}
.sidebar-group a.is-current{background:rgba(225,29,46,.10);color:var(--title);font-weight:800}
.sidebar-group a.is-current::before{height:22px}
.full-directory-link{display:flex;align-items:center;min-height:44px;color:var(--paper);border-top:1px solid var(--border);padding-top:10px}
.site-main{padding:32px 0 64px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:var(--muted);font-size:14px;margin-bottom:24px}
.breadcrumb a{color:var(--paper)}
.page-intro{max-width:800px;margin-bottom:34px}
.page-kicker,.section-kicker{display:inline-block;color:var(--red-hi);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:8px}
h1{font-size:clamp(28px,3vw,32px);line-height:1.25;color:var(--title);margin-bottom:14px}
h2{font-size:22px;line-height:1.4;color:var(--title);margin-bottom:12px}
h3{font-size:18px;line-height:1.45;color:var(--title);margin-bottom:8px}
.lead{font-size:18px;color:var(--paper);line-height:1.8}
.content-column{max-width:800px}
.article-section{padding:0 0 30px;margin:0 0 30px;border-bottom:1px solid var(--border)}
.article-section:last-child{border-bottom:0}
.article-section p{margin-bottom:14px}
.article-section p:last-child{margin-bottom:0}
.section-block{margin:0 0 48px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:18px}
.section-head p{max-width:520px;margin:0;color:var(--muted)}
.hero-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,1fr);gap:28px;align-items:center;background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--red);padding:28px;border-radius:8px}
.hero-feature h1{margin-bottom:14px}
.hero-feature p{color:var(--paper)}
.hero-media{display:flex;justify-content:center;align-items:center;max-height:300px;overflow:hidden}
.hero-media .content-image{max-height:300px;width:auto;max-width:100%;object-fit:contain;object-position:center}
.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.button-primary,.button-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 16px;border-radius:6px;font-weight:800}
.button-primary{background:linear-gradient(135deg,#FF4A4F 0%,#E11D2E 46%,#E25A2A 100%);color:#fffaf3}
.button-secondary{background:var(--paper);color:#2b211a}
.button-primary:hover{color:white;filter:brightness(1.05)}
.button-secondary:hover{color:#16100c;background:#fff2de}
.media-frame{display:flex;align-items:center;justify-content:center;padding:10px;background:var(--surface);border:1px solid var(--border);border-radius:8px}
.content-image{width:auto;max-width:100%;height:auto;object-fit:contain;object-position:center}
.media-wide .content-image{max-height:240px}
.media-app .content-image{max-height:420px}
.media-logo .content-image{max-height:72px}
.media-fallback{display:flex;align-items:center;justify-content:center;min-height:132px;max-height:180px;width:100%;padding:18px;border:1px solid var(--border);border-radius:8px;background:linear-gradient(135deg,#161311 0%,#35171b 100%);color:var(--paper);text-align:center}
.hero-media .media-fallback{min-height:220px;max-height:300px}
.path-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.path-card{display:block;padding:16px;border-top:2px solid var(--red);background:var(--surface);border-radius:4px}
.path-card strong{display:block;color:var(--title);margin-bottom:5px}
.path-card span{display:block;color:var(--muted);font-size:14px;line-height:1.65}
.digest-layout{display:grid;grid-template-columns:minmax(220px,.7fr) minmax(0,1.6fr);gap:24px;align-items:start}
.digest-list{display:grid;gap:12px}
.digest-item{padding:16px 0;border-bottom:1px solid var(--border)}
.digest-item:first-child{padding-top:0}
.digest-item:last-child{border-bottom:0;padding-bottom:0}
.digest-item h3{margin-bottom:6px}
.digest-item a{color:var(--red-hi);font-weight:700}
.feature-stack{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}
.feature-stack .media-frame{border:0;border-bottom:1px solid var(--border);border-radius:0}
.feature-body{padding:22px}
.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.mini-note{padding:14px;background:var(--surface-2);border-top:2px solid var(--rust);border-radius:5px}
.mini-note strong{display:block;color:var(--title);margin-bottom:4px}
.mini-note p{font-size:14px;line-height:1.65;margin:0;color:var(--muted)}
.editorial-pair{display:grid;grid-template-columns:1.12fr .88fr;gap:24px;align-items:start}
.editorial-unit{padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:8px}
.editorial-unit.alt{margin-top:36px}
.editorial-unit .media-frame{margin-bottom:16px}
.focus-points{display:grid;gap:8px;margin-top:14px}
.focus-points p{margin:0;padding:10px 12px;background:var(--bg-deep);border-left:2px solid var(--amber);color:var(--muted);font-size:14px}
.split-layout{display:grid;grid-template-columns:minmax(260px,.9fr) minmax(0,1.1fr);gap:24px;align-items:center}
.analysis-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px}
.analysis-item{padding:14px;background:var(--surface-2);border-radius:6px}
.analysis-item strong{display:block;color:var(--amber);margin-bottom:5px}
.reading-band{display:grid;grid-template-columns:minmax(240px,.8fr) minmax(0,1.2fr);gap:24px;align-items:center;padding:20px 0;border-top:1px solid var(--border)}
.reading-band:last-child{border-bottom:1px solid var(--border)}
.reading-band.reverse{grid-template-columns:minmax(0,1.2fr) minmax(240px,.8fr)}
.reading-band.reverse .band-copy{order:1}.reading-band.reverse .media-frame{order:2}
.check-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:14px}
.check-item{padding:13px;background:var(--surface);border-top:2px solid var(--amber);border-radius:5px}
.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.compare-card{padding:16px;background:var(--paper);color:#2c241e;border-radius:6px}
.compare-card h3{color:#201a15}.compare-card p{margin:0}
.trace-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:18px}
.trace-card{padding:14px;background:var(--surface);border-left:3px solid var(--wine);border-radius:5px}
.status-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.status-card{padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:6px}
.status-card strong{display:block;color:var(--paper);margin-bottom:5px}
.status-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.status-card:nth-child(1),.status-card:nth-child(2){border-top:3px solid var(--amber)}
.status-card:nth-child(3),.status-card:nth-child(6){border-top:3px solid var(--soft)}
.status-card:nth-child(4){border-top:3px solid var(--rust)}
.status-card:nth-child(5){border-top:3px solid var(--red)}
.topic-index{display:grid;gap:14px}
.topic-entry{display:grid;grid-template-columns:200px minmax(0,1fr);gap:18px;padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:6px}
.topic-entry h3{margin:0}
.observation-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.observation-card{padding:18px;border-top:2px solid var(--red);background:var(--surface)}
.observation-label{display:inline-block;color:var(--amber);font-size:12px;font-weight:800;letter-spacing:.08em;margin-bottom:6px}
.clue-strip{padding:22px 0 22px 20px;border-left:2px solid var(--red)}
.mobile-feature{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(220px,.7fr);gap:28px;align-items:center;background:var(--surface);padding:24px;border:1px solid var(--border);border-radius:8px}
.mobile-feature .media-frame{background:var(--bg-deep)}
.text-trio{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.text-unit{padding:18px;border-top:2px solid var(--red);background:var(--surface)}
.text-unit p{margin-bottom:10px}
.text-link{display:inline-flex;align-items:center;min-height:44px;color:var(--red-hi);font-weight:800}
.text-link::after{content:"→";margin-left:6px}
.page-cover{margin-bottom:26px;display:flex;justify-content:center}
.page-cover .content-image{max-height:280px}
.article-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:0 0 28px}
.article-index a{display:flex;align-items:center;min-height:44px;padding:9px 12px;border:1px solid var(--border);border-radius:5px;background:var(--surface);color:var(--paper)}
.article-index a:hover{border-color:var(--border-strong)}
.info-contrast{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:16px 0 28px}
.info-contrast>div{padding:16px;border-radius:6px}
.info-contrast .fact{background:var(--paper);color:#2a211a}.info-contrast .fact h3{color:#1e1712}
.info-contrast .view{background:var(--surface);border:1px solid var(--border)}
.stack-table{width:100%;border-collapse:collapse;margin:16px 0 28px}
.stack-table th,.stack-table td{text-align:left;vertical-align:top;border:1px solid var(--border);padding:12px}
.stack-table th{background:var(--surface-2);color:var(--paper);width:22%}
.stack-table td{background:var(--surface)}
.method-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:20px 0 30px}
.method-card{padding:16px;background:var(--surface);border-left:3px solid var(--red);border-radius:4px}
.method-card p{margin:0}
.rule-list{display:grid;gap:14px}
.rule-card{padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:6px}
.rule-card h2{font-size:19px}
.faq-list{display:grid;gap:10px}
.faq-list details{background:var(--surface);border:1px solid var(--border);border-radius:6px}
.faq-list summary{list-style:none;cursor:pointer;min-height:52px;padding:12px 16px;color:var(--title);font-weight:800;display:flex;align-items:center;justify-content:space-between;gap:12px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"＋";color:var(--red-hi);font-size:20px}
.faq-list details[open] summary::after{content:"－"}
.faq-answer{padding:0 16px 16px;color:var(--text)}
.faq-answer p{margin:0}
.related-links{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:36px;padding-top:18px;border-top:1px solid var(--border)}
.related-label{color:var(--soft);font-size:13px;margin-right:4px}
.related-links a{display:inline-flex;align-items:center;min-height:44px;padding:7px 12px;border:1px solid var(--border);border-radius:5px;color:var(--paper)}
.related-links a:hover{border-color:var(--border-strong);background:rgba(225,29,46,.08)}
.site-footer{background:var(--footer);border-top:1px solid var(--red);color:var(--footer-text)}
.footer-inner{max-width:var(--max);margin:0 auto;padding:38px 24px 42px}
.footer-brand{max-width:700px;margin-bottom:28px}
.footer-brand p{color:var(--muted);margin:14px 0 0}
.footer-directory{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:22px}
.footer-group h2{font-size:13px;color:var(--amber);letter-spacing:.08em;margin-bottom:8px}
.footer-group a{display:block;min-height:36px;padding:4px 0;color:var(--footer-text);font-size:14px}
.footer-group a[aria-current="page"]{color:var(--title);font-weight:800}
.copyright{margin:28px 0 0;padding-top:18px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.mobile-bottom-nav{display:none}
@media (min-width:1100px) and (min-height:900px){.desktop-sidebar-inner{position:sticky;top:24px}}
@media (max-width:1099px){
  .header-inner,.tool-zone-inner,.site-frame,.footer-inner{padding-left:20px;padding-right:20px}
  .tool-zone-inner{display:grid;grid-template-columns:1fr 1fr}
  .site-tool{width:100%}.directory-tool{display:block}
  .site-frame{display:block}.desktop-sidebar{display:none}.site-main{padding-top:28px}
  .footer-directory{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:900px){
  .hero-feature,.digest-layout,.split-layout,.reading-band,.reading-band.reverse,.mobile-feature{grid-template-columns:1fr}
  .reading-band.reverse .band-copy,.reading-band.reverse .media-frame{order:initial}
  .editorial-pair{grid-template-columns:1fr}.editorial-unit.alt{margin-top:0}
  .trace-grid,.path-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .status-grid,.text-trio{grid-template-columns:1fr}
  .topic-entry{grid-template-columns:1fr}
  .mobile-feature .media-frame{order:2}
}
@media (max-width:767px){
  body{padding-bottom:calc(78px + env(safe-area-inset-bottom))}
  .header-inner{min-height:64px;padding:10px 16px;gap:12px}.brand{gap:8px}.brand-logo{height:30px}.brand-en{font-size:10px}.header-links{gap:6px}
  .header-links a{padding:0 10px}.faq-header-link{display:none}
  .tool-zone-inner{padding:8px 16px;grid-template-columns:1fr;gap:8px}
  .site-frame{padding:0 16px}.site-main{padding:24px 0 42px}
  h1{font-size:clamp(24px,7vw,28px)}h2{font-size:20px}.lead{font-size:17px}
  .section-block{margin-bottom:34px}.section-head{display:block}.section-head p{margin-top:8px}
  .hero-feature{padding:20px}.hero-media{max-height:260px}.hero-media .content-image{max-height:260px}.hero-media .media-fallback{min-height:140px;max-height:140px}
  .path-grid,.mini-grid,.analysis-list,.compare-grid,.check-grid,.status-grid,.observation-grid,.text-trio,.method-grid,.article-index{grid-template-columns:1fr}
  .path-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .trace-grid{grid-template-columns:1fr}.directory-groups,.search-results{grid-template-columns:1fr}
  .editorial-unit{padding:14px}.feature-body{padding:18px}.reading-band{padding:16px 0}
  .media-wide .content-image{max-height:none}.media-app .content-image{max-height:360px}.media-fallback{min-height:112px;max-height:140px}
  .stack-table,.stack-table tbody,.stack-table tr,.stack-table th,.stack-table td{display:block;width:100%}
  .stack-table{border:0}.stack-table tr{margin-bottom:12px;border:1px solid var(--border);border-radius:6px;overflow:hidden}.stack-table th,.stack-table td{border:0;border-bottom:1px solid var(--border)}.stack-table td:last-child{border-bottom:0}
  .stack-table th::before{content:"字段：";color:var(--muted);font-weight:400}
  .footer-inner{padding:34px 16px calc(34px + env(safe-area-inset-bottom))}.footer-directory{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:repeat(5,1fr);height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#100e0d;border-top:1px solid var(--border-strong);box-shadow:0 -8px 24px rgba(0,0,0,.32)}
  .mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;min-height:56px;color:var(--muted);font-size:13px;font-weight:700;position:relative}
  .mobile-bottom-nav a.is-current{color:var(--title)}.mobile-bottom-nav a.is-current::before{content:"";position:absolute;top:0;left:20%;right:20%;height:3px;background:var(--red);border-radius:0 0 3px 3px}
}
@media (max-width:420px){
  .brand-en{display:none}.header-links a{font-size:13px}.path-grid{grid-template-columns:1fr}.footer-directory{grid-template-columns:1fr}.search-row{grid-template-columns:1fr}.search-row button{width:100%}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}