:root {
  --bg:#0C0B0A;
  --deep:#161311;
  --panel:#1C1916;
  --panel-2:#26221D;
  --paper:#F3E6D2;
  --title:#FFF8F0;
  --text:#EDE4D8;
  --muted:#B7A898;
  --subtle:#8A7B6C;
  --red:#E11D2E;
  --red-hi:#FF4A4F;
  --wine:#8B1E2D;
  --rust:#E25A2A;
  --amber:#E2B14A;
  --line:rgba(226,177,74,.16);
  --line-strong:rgba(225,29,46,.40);
  --shadow:0 18px 44px rgba(0,0,0,.46);
  --footer:#080706;
  --footer-text:#D8CBBA;
  --radius:8px;
  --shell: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-wrap:anywhere}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:var(--red-hi)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
button,input{font:inherit}
button{cursor:pointer}
.shell{width:min(calc(100% - 32px),var(--shell));margin-inline:auto}
.skip-link{position:absolute;left:12px;top:-80px;z-index:50;background:var(--paper);color:#2a1b16;padding:10px 14px;border-radius:6px}
.skip-link:focus{top:12px}

.site-header{background:var(--deep);border-bottom:1px solid var(--line)}
.brand-row{min-height:80px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;min-height:44px}
.brand-logo,.footer-logo{height:34px;width:auto;max-width:180px;object-fit:contain;object-position:center}
.brand-text{font-weight:800;font-size:24px;color:var(--title);letter-spacing:.04em}
.brand-en{font-size:12px;letter-spacing:.18em;color:var(--muted);white-space:nowrap}
.brand-links{display:flex;gap:8px;align-items:center}
.brand-links a{min-height:44px;display:inline-flex;align-items:center;padding:0 12px;color:var(--paper);border:1px solid transparent;border-radius:6px}
.brand-links a:hover{border-color:var(--line-strong);background:rgba(225,29,46,.08)}

.tool-zone{background:var(--deep);border-bottom:1px solid rgba(255,255,255,.04)}
.tool-grid{display:grid;grid-template-columns:auto minmax(280px,440px);justify-content:end;gap:10px;padding-block:10px}
.site-tool{background:var(--panel);border:1px solid var(--line);border-radius:7px}
.site-tool summary{list-style:none;min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 14px;color:var(--paper);cursor:pointer;user-select:none}
.site-tool summary::-webkit-details-marker{display:none}
.summary-state::before{content:"＋";display:block;color:var(--amber);font-weight:700}
.site-tool[open] .summary-state::before{content:"－"}
.tool-panel{border-top:1px solid var(--line);padding:18px;background:var(--deep)}
.directory-tool{display:none}
.directory-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.directory-group h2,.side-group h2,.site-footer h2{margin:0 0 9px;font-size:13px;letter-spacing:.08em;color:var(--amber)}
.directory-group ul,.side-group ul,.site-footer ul,.search-results{list-style:none;margin:0;padding:0}
.directory-group li+li{margin-top:6px}
.directory-group a{display:block;padding:9px 10px;border-radius:6px;border:1px solid transparent;min-height:44px}
.directory-group a:hover,.directory-group a[aria-current="page"]{background:var(--panel-2);border-color:var(--line)}
.directory-group strong{display:block;color:var(--title);font-size:15px}
.directory-group span{display:block;color:var(--muted);font-size:13px;line-height:1.55;margin-top:2px}
.tool-close{margin-top:16px;min-height:44px;border:1px solid var(--line-strong);background:transparent;color:var(--paper);border-radius:6px;padding:8px 14px}
.site-search label{display:block;color:var(--paper);font-weight:700;margin-bottom:7px}
.search-controls{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.search-controls input{min-height:44px;width:100%;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--text);padding:9px 12px}
.search-controls button{min-height:44px;border:0;border-radius:6px;background:var(--paper);color:#2b1e18;padding:8px 15px;font-weight:700}
.search-note{margin:8px 0 14px;color:var(--muted);font-size:13px}
.search-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
.search-results li[hidden]{display:none}
.search-results a{display:block;min-height:64px;padding:9px 10px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}
.search-results strong{display:block;color:var(--title);font-size:14px}
.search-results span{display:block;color:var(--muted);font-size:13px;line-height:1.5;margin-top:2px}
.search-empty{margin:14px 0 0;color:var(--paper);background:var(--wine);padding:10px 12px;border-radius:6px}

.content-frame{display:grid;grid-template-columns:196px minmax(0,1fr);gap:24px;padding-block:34px 52px}
.desktop-sidebar{align-self:start;border-right:1px solid var(--line);padding-right:18px}
.side-group+.side-group{margin-top:22px}
.side-group li+li{margin-top:3px}
.side-group a{display:flex;align-items:center;min-height:40px;padding:5px 8px 5px 14px;color:var(--muted);border-radius:5px;position:relative}
.side-group a:hover{background:var(--panel);color:var(--title)}
.side-group a.is-current{background:var(--panel-2);color:var(--title);font-weight:700}
.side-group a.is-current::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;background:var(--red);border-radius:2px}
.full-directory-link{display:inline-flex;align-items:center;min-height:44px;margin-top:22px;color:var(--paper);border-top:1px solid var(--line);padding-top:10px;width:100%}
.site-main{width:100%;max-width:100%}

.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:16px}
.breadcrumb a{text-decoration:underline;text-underline-offset:3px}
.page-hero{border-bottom:1px solid var(--line);padding:0 0 24px;margin-bottom:28px}
.kicker{margin:0 0 8px;color:var(--red-hi);font-size:13px;font-weight:700;letter-spacing:.08em}
h1,h2,h3{color:var(--title);line-height:1.3}
h1{font-size:clamp(28px,3vw,32px);margin:0 0 12px;letter-spacing:-.02em}
h2{font-size:22px;margin:0 0 12px}
h3{font-size:18px;margin:0 0 8px}
p{margin:0 0 1em}
.lead{font-size:18px;color:var(--paper);max-width:780px;line-height:1.8}
.section-note{font-size:14px;color:var(--muted)}

.content-media{margin:0;display:flex;justify-content:center;align-items:center;min-width:0;border:1px solid var(--line);border-radius:8px;background:var(--deep);padding:10px;overflow:hidden}
.content-media img{width:auto;max-width:100%;height:auto;max-height:240px;object-fit:contain;object-position:center}
.media-fallback{width:100%;min-height:130px;max-height:180px;display:flex;align-items:center;justify-content:center;text-align:center;padding:20px;background:linear-gradient(135deg,var(--deep),#351419);color:var(--paper);border-radius:5px;border:1px solid rgba(225,29,46,.22)}
.media-fallback span{font-weight:700;letter-spacing:.04em}
.hero-cover img{max-height:300px}
.hero-cover .media-fallback{min-height:220px;max-height:300px}
.app-media img{max-height:420px}
.app-media .media-fallback{min-height:240px;max-height:420px}
.logo-media img{max-height:72px}
.logo-media .media-fallback{min-height:60px;max-height:72px;padding:8px}

.prose{max-width:780px}
.prose.wide{max-width:none}
.prose section{scroll-margin-top:20px}
.prose section+section{margin-top:40px;padding-top:36px;border-top:1px solid var(--line)}
.prose p{color:var(--text)}
.prose ul,.prose ol{padding-left:1.25em;margin:12px 0 18px}
.prose li+li{margin-top:7px}
.prose a{text-decoration:underline;text-decoration-color:rgba(255,74,79,.55);text-underline-offset:3px}
.in-page-toc{margin:22px 0 32px;padding:16px;border:1px solid var(--line);background:var(--deep);border-radius:8px;max-width:780px}
.in-page-toc strong{display:block;color:var(--amber);font-size:13px;letter-spacing:.08em;margin-bottom:7px}
.in-page-toc ul{display:flex;flex-wrap:wrap;gap:8px 14px;list-style:none;margin:0;padding:0}
.in-page-toc a{display:inline-flex;min-height:36px;align-items:center;color:var(--paper);text-decoration:underline;text-underline-offset:3px}
.callout{max-width:780px;margin:28px 0;padding:18px 20px;background:var(--paper);color:#2e211b;border-radius:8px;border-left:4px solid var(--red)}
.callout h2,.callout h3{color:#221713}
.callout p{color:#3f3028;margin-bottom:.7em}
.callout p:last-child{margin-bottom:0}
.status-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:900px}
.status-card{border:1px solid var(--line);background:var(--panel);border-radius:7px;padding:16px}
.status-card strong{display:block;color:var(--paper);margin-bottom:6px}
.status-card p{font-size:14px;color:var(--muted);margin:0}
.status-card::before{content:"";display:block;width:28px;height:3px;background:var(--red);margin-bottom:10px}
.related-links{margin-top:46px;border-top:1px solid var(--line-strong);padding-top:24px}
.related-links h2{font-size:18px}
.related-links ul{display:flex;flex-wrap:wrap;gap:8px 10px;list-style:none;margin:0;padding:0}
.related-links a,.text-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 14px;border-radius:6px;border:1px solid var(--line);background:var(--panel);color:var(--paper);font-weight:700}
.related-links a:hover,.text-button:hover{background:var(--panel-2);border-color:var(--line-strong)}
.primary-button{background:linear-gradient(135deg,#FF4A4F 0%,#E11D2E 46%,#E25A2A 100%);border:0;color:#fff8f0}
.secondary-button{background:var(--paper);color:#2b1e18;border:0}

/* 首页 */
.home-section{padding-block:42px;border-top:1px solid var(--line)}
.home-section:first-child{border-top:0;padding-top:0}
.home-section>.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}
.home-section>.section-heading p{color:var(--muted);max-width:620px;margin:0}
.feature-lead{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:center}
.feature-copy .eyebrow{color:var(--red-hi);font-size:13px;font-weight:800;letter-spacing:.1em;margin-bottom:8px}
.feature-copy .feature-line{font-size:clamp(26px,3vw,36px);line-height:1.35;color:var(--title);font-weight:800;margin-bottom:16px}
.feature-copy p{color:var(--text);max-width:640px}
.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.reading-paths{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.path-card{display:block;border:1px solid var(--line);background:var(--panel);padding:16px;border-radius:7px;min-height:132px}
.path-card strong{display:block;color:var(--title);margin-bottom:7px}
.path-card span{display:block;color:var(--muted);font-size:14px;line-height:1.65}
.digest-grid{display:grid;grid-template-columns:minmax(220px,.7fr) minmax(0,1.3fr);gap:24px;align-items:start}
.digest-list{display:grid;gap:12px}
.digest-item{padding:16px 0;border-bottom:1px solid var(--line)}
.digest-item:first-child{padding-top:0}
.digest-item h3{font-size:18px}
.digest-item p{color:var(--muted)}
.digest-item a{display:inline-flex;min-height:36px;align-items:center;color:var(--paper);text-decoration:underline;text-underline-offset:3px}
.focus-layout{display:grid;gap:20px}
.focus-layout>.content-media img{max-height:230px}
.focus-copy-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,.6fr);gap:26px}
.focus-minis{display:grid;gap:10px}
.mini-note{padding:14px;border-left:2px solid var(--red);background:var(--panel)}
.mini-note strong{display:block;color:var(--paper);margin-bottom:4px}
.mini-note p{margin:0;color:var(--muted);font-size:14px}
.editorial-duo{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:18px;align-items:start}
.editorial-unit{border-top:3px solid var(--red);padding-top:14px}
.editorial-unit .content-media{margin-bottom:16px}
.editorial-unit p{color:var(--muted)}
.editorial-points{display:grid;gap:8px;margin-top:12px}
.editorial-points p{border-top:1px solid var(--line);padding-top:8px;font-size:14px}
.split-band{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:24px;align-items:center}
.split-band.reverse{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr)}
.analysis-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:18px}
.analysis-list div{padding:13px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}
.analysis-list strong{display:block;color:var(--paper);margin-bottom:4px}
.analysis-list p{margin:0;color:var(--muted);font-size:14px}
.reading-band{display:grid;grid-template-columns:minmax(220px,.7fr) minmax(0,1.3fr);gap:24px;align-items:center;padding:20px 0;border-top:1px solid var(--line)}
.reading-band:first-of-type{border-top:0}
.check-points{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:14px}
.check-points div{padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:6px}
.check-points strong{display:block;color:var(--paper);margin-bottom:4px}
.check-points p{margin:0;color:var(--muted);font-size:13px}
.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:18px}
.compare-cell{padding:17px;background:var(--paper);color:#34261f;border-radius:7px}
.compare-cell h3{color:#241813;font-size:16px}
.compare-cell p{color:#4b382e;margin:0;font-size:14px}
.trail-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:18px}
.trail-step{padding:14px;border-top:2px solid var(--rust);background:var(--panel)}
.trail-step strong{display:block;color:var(--paper);margin-bottom:5px}
.trail-step p{color:var(--muted);font-size:14px;margin:0}
.topic-stack{display:grid;gap:22px}
.topic-row{display:grid;grid-template-columns:minmax(220px,.7fr) minmax(0,1.3fr);gap:22px;align-items:start}
.topic-list{display:grid;gap:10px}
.topic-card{border-left:3px solid var(--red);padding:10px 0 10px 15px}
.topic-card h3{font-size:17px}
.topic-card p{color:var(--muted);margin:0}
.red-rule-section{border-top:2px solid var(--red);padding-top:22px}
.mobile-reading{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(220px,.8fr);gap:28px;align-items:center}
.mobile-images{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center}
.mobile-images .app-media img{max-height:420px}
.mobile-images .mark-box{border:1px solid var(--line);background:var(--panel);padding:14px;border-radius:7px}
.mobile-images .mark-box img{max-width:72px;max-height:72px;object-fit:contain}
.final-text-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.final-text-grid article{padding:20px;border-top:3px solid var(--red);background:var(--panel)}
.final-text-grid p{color:var(--muted)}

/* 表格与问答 */
.data-table{width:100%;border-collapse:collapse;margin:20px 0 28px}
.data-table th,.data-table td{text-align:left;vertical-align:top;border:1px solid var(--line);padding:12px 14px}
.data-table th{background:var(--panel-2);color:var(--paper)}
.data-table td{background:var(--panel);color:var(--text)}
.faq-list{max-width:820px;display:grid;gap:10px}
.faq-list details{border:1px solid var(--line);background:var(--panel);border-radius:7px}
.faq-list summary{cursor:pointer;min-height:48px;padding:11px 14px;color:var(--title);font-weight:700}
.faq-list .faq-answer{padding:0 14px 14px;color:var(--text)}
.faq-list .faq-answer p:last-child{margin-bottom:0}
.help-grid,.brief-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;max-width:980px}
.help-card,.brief-card{background:var(--panel);border:1px solid var(--line);border-radius:7px;padding:18px}
.help-card p,.brief-card p{color:var(--muted)}
.help-card a,.brief-card a{text-decoration:underline;text-underline-offset:3px;color:var(--paper)}

.site-footer{background:var(--footer);color:var(--footer-text);border-top:1px solid var(--red);padding:36px 0 28px}
.footer-brand-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand strong{color:var(--title);font-size:20px}
.footer-brand span{font-size:12px;letter-spacing:.16em;color:var(--muted)}
.footer-home-link{min-height:44px;display:inline-flex;align-items:center;padding:0 10px;text-decoration:underline;text-underline-offset:3px}
.footer-directory-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:22px;padding-block:28px}
.site-footer li+li{margin-top:5px}
.site-footer a{display:inline-flex;min-height:34px;align-items:center;color:var(--footer-text)}
.site-footer a[aria-current="page"]{color:var(--red-hi);font-weight:700}
.footer-note{border-top:1px solid var(--line);padding-top:20px}
.footer-note p{color:var(--muted);font-size:13px;max-width:980px}
.footer-note p:last-child{margin-bottom:0}
.mobile-bottom-nav{display:none}

@media (max-width:1099px){
  .content-frame{display:block;padding-top:28px}
  .desktop-sidebar{display:none}
  .directory-tool{display:block}
  .tool-grid{grid-template-columns:1fr 1fr;justify-content:stretch}
  .search-tool{grid-column:auto}
  .site-tool summary{width:100%}
  .footer-directory-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:900px){
  .feature-lead,.digest-grid,.focus-copy-grid,.split-band,.split-band.reverse,.reading-band,.topic-row,.mobile-reading{grid-template-columns:1fr}
  .reading-paths{grid-template-columns:repeat(2,minmax(0,1fr))}
  .editorial-duo{grid-template-columns:1fr}
  .analysis-list,.compare-grid{grid-template-columns:1fr}
  .trail-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .check-points{grid-template-columns:repeat(2,minmax(0,1fr))}
  .final-text-grid{grid-template-columns:1fr}
  .status-grid{grid-template-columns:1fr}
  .help-grid,.brief-grid{grid-template-columns:1fr}
}

@media (max-width:767px){
  body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}
  .shell{width:min(calc(100% - 32px),var(--shell))}
  .brand-row{min-height:64px;gap:8px}
  .brand-logo{height:30px;max-width:145px}
  .brand-en{font-size:10px;letter-spacing:.12em}
  .brand-links{gap:0}
  .brand-links a{padding-inline:8px;font-size:14px}
  .tool-grid{grid-template-columns:1fr;gap:8px;padding-block:8px}
  .directory-grid{grid-template-columns:1fr}
  .search-results{grid-template-columns:1fr}
  .content-frame{padding-bottom:36px}
  h1{font-size:clamp(24px,8vw,28px)}
  h2{font-size:20px}
  .lead{font-size:17px}
  .home-section{padding-block:32px}
  .home-section>.section-heading{display:block}
  .home-section>.section-heading p{margin-top:8px}
  .feature-lead{display:flex;flex-direction:column}
  .feature-copy{order:1}
  .feature-lead .hero-cover{order:2;width:100%}
  .hero-cover img{max-height:260px}
  .hero-cover .media-fallback{min-height:160px;max-height:220px}
  .content-media img{max-height:none}
  .app-media img{max-height:360px}
  .reading-paths{grid-template-columns:repeat(2,minmax(0,1fr))}
  .path-card{min-height:116px;padding:13px}
  .trail-grid{grid-template-columns:1fr}
  .check-points{grid-template-columns:1fr 1fr}
  .mobile-reading{display:flex;flex-direction:column}
  .mobile-reading .mobile-copy{order:1}
  .mobile-reading .mobile-images{order:2;width:100%}
  .mobile-images{grid-template-columns:1fr;justify-items:center}
  .mobile-images .mark-box{width:max-content}
  .footer-directory-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 16px}
  .footer-brand-row{align-items:flex-start}
  .mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:rgba(8,7,6,.98);border-top:1px solid var(--line-strong);box-shadow:0 -8px 20px rgba(0,0,0,.34)}
  .mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;min-height:56px;color:var(--muted);font-size:14px;font-weight:650;border-top:2px solid transparent}
  .mobile-bottom-nav a.is-current{color:var(--title);border-top-color:var(--red)}
  .data-table,.data-table thead,.data-table tbody,.data-table tr,.data-table th,.data-table td{display:block;width:100%}
  .data-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;clip-path:inset(50%)}
  .data-table tr{margin-bottom:12px;border:1px solid var(--line);border-radius:7px;overflow:hidden;background:var(--panel)}
  .data-table td{border:0;border-bottom:1px solid var(--line);padding:10px 12px}
  .data-table td:last-child{border-bottom:0}
  .data-table td::before{content:attr(data-label);display:block;color:var(--amber);font-size:12px;font-weight:800;letter-spacing:.06em;margin-bottom:2px}
}

@media (max-width:420px){
  .brand-faq-link{display:none!important}
  .brand-en{display:none}
  .reading-paths{grid-template-columns:1fr}
  .check-points{grid-template-columns:1fr}
  .footer-directory-grid{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}