:root{color-scheme:dark;--bg:#111819;--panel:#1a2324;--line:#344041;--cream:#ede9dc;--gold:#ddc89b;--muted:#a3afac;--sage:#b8cbbd}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--bg);color:var(--cream);font:14px/1.85 'Microsoft YaHei','PingFang SC',system-ui,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:5px}a,button{transition:background .2s,color .2s,transform .2s}button{color:inherit}h1,h2,h3,p{margin:0}h1,h2{font-family:'Noto Serif SC','Songti SC','SimSun',serif}h2{font-size:32px;font-weight:500;line-height:1.5;letter-spacing:.03em}.shell{width:min(1240px,calc(100% - 80px));margin:auto}.header{height:100px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px}.brand b{font-size:18px;font-weight:500;letter-spacing:.06em}.brand small{display:block;font:9px/1.8 monospace;letter-spacing:.16em;color:var(--muted)}.seal{height:42px;width:42px;display:grid;place-items:center;border:1px solid #817759;border-radius:12px;color:var(--gold);font:29px Georgia}nav{display:flex;align-items:center;gap:28px;font-size:12px;color:#c1c9c3}.nav-cta{border:1px solid #746d56;border-radius:7px;padding:8px 16px;color:var(--gold)}nav a:hover,.text-link:hover{color:#fff}.hero{display:grid;grid-template-columns:1fr 1.08fr;gap:52px;padding-block:60px 50px;align-items:center}.eyebrow{color:var(--gold);font:10px/1.8 monospace;letter-spacing:.12em}.dot{display:inline-block;width:6px;height:6px;background:#b9c9a7;border-radius:50%;margin-right:8px;vertical-align:middle}h1{font-size:clamp(42px,4.3vw,64px);line-height:1.3;font-weight:500;letter-spacing:.05em;margin:24px 0}h1 em{color:var(--gold);font-style:normal}.hero-lead{font-size:20px;letter-spacing:.12em;margin-bottom:12px}.muted{color:var(--muted)}.intro{font-size:14px;line-height:2}.hero-actions{display:flex;gap:25px;align-items:center;margin-top:29px}.button{display:flex;justify-content:space-between;align-items:center;padding:13px 21px;border-radius:6px;font-size:14px;font-weight:600;gap:30px}.primary{background:var(--gold);color:#202b29;border:1px solid #ebdcb7}.primary:hover{background:#eddbb4;transform:translateY(-2px)}.text-link{font-size:12px;color:var(--gold)}.hero-meta{display:flex;flex-wrap:wrap;gap:0;margin-top:26px;color:#8f9d98;font-size:10px}.hero-meta span+span:before{content:'/';padding:0 10px;color:#536360}.archive{background:#1a2225;border:1px solid #535448;border-radius:16px;overflow:hidden}.archive-head{display:flex;justify-content:space-between;font:9px monospace;letter-spacing:.08em;color:#c2b99d;padding:18px 22px}.archive img{display:block;width:100%;aspect-ratio:1052/592;object-fit:cover}.archive-caption{display:flex;gap:14px;align-items:center;padding:24px;font-family:'Songti SC',serif;font-size:19px}.caption-rule{width:24px;height:1px;background:var(--gold)}.archive-caption small{display:block;font:9px/2.4 monospace;letter-spacing:.13em;color:#8b9690}.cross{margin-left:auto;color:var(--gold);font-size:26px}.status-bar{border-block:1px solid var(--line);display:flex;justify-content:space-between;padding-block:15px;font-size:11px;color:var(--muted)}.status-bar b{font-weight:400;margin:0 15px;color:var(--gold)}.status-bar a{color:var(--gold)}.section{padding-block:66px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}.section-heading h2{margin-top:9px}.section-heading>p{font-size:12px;color:var(--muted);padding-bottom:6px}.modules{display:grid;grid-template-columns:1fr 1fr;gap:22px}.module{position:relative;background:linear-gradient(135deg,#202a29,#192224);padding:29px 32px 0;border:1px solid #46504a;border-radius:10px;overflow:hidden}.module.anchor{background:linear-gradient(135deg,#24272e,#1b2329);border-color:#454851}.module-top{display:flex;justify-content:space-between;font:10px monospace;letter-spacing:.1em;color:var(--gold)}.anchor .module-top{color:#c1bdd9}.version{border:1px solid #535849;padding:3px 8px;border-radius:3px;letter-spacing:0}.module h3{font:500 26px/1.5 'Songti SC','SimSun',serif;margin:25px 0 2px;position:relative}.module-en{font:9px monospace;letter-spacing:.16em;color:#929f99}.module-desc{max-width:390px;color:#b4c0ba;font-size:13px;margin-top:24px}.module-symbol{position:absolute;right:28px;top:71px;color:#d2bc8b22;font:84px/1 Georgia}.anchor-symbol{color:#b3acd432}.features{list-style:none;margin:22px 0 26px;padding:0;font-size:12px;color:#cdd2c9}.features li{margin:7px 0}.features li:before{content:'+';color:var(--gold);margin-right:12px}.anchor .features li:before{color:#bfb9d8}.module-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #414a43;padding:17px 0;font-size:10px;color:#9aa69c}.module-bottom a{font-size:12px;color:var(--gold)}.guide-section{padding-top:4px}.notice{display:flex;gap:19px;padding:20px 24px;border:1px solid #655d43;background:#282a23;border-radius:7px}.notice>span{font:28px Georgia;color:var(--gold)}.notice strong{font-size:13px;font-weight:500;color:#e6d5ae}.notice p{color:#b9b9a7;font-size:12px;margin-top:4px}.guide-tabs{display:flex;gap:28px;margin-top:27px;border-bottom:1px solid var(--line)}.guide-tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:12px 4px;color:var(--muted);font-size:13px}.guide-tabs button[aria-selected=true]{border-bottom-color:var(--gold);color:var(--gold)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:29px 0}.steps article+article{border-left:1px solid var(--line);padding-left:28px}.steps article>span{font:20px Georgia;color:#9b997f}.steps h3{font-size:16px;font-weight:500;margin:14px 0 10px}.steps p{font-size:12px;color:var(--muted);line-height:2}.guide-foot{font-size:11px;color:#b9b9a2;border-top:1px solid var(--line);padding:16px 0}.notes-section{padding-top:6px}.notes-grid{display:grid;grid-template-columns:1fr 1.9fr;gap:70px}.notes-intro{padding:20px 0}.note-mark{display:grid;place-items:center;border:1px solid #6d715c;border-radius:50%;width:34px;height:34px;font:20px Georgia;color:var(--gold)}.notes-intro h3{font:24px/1.7 'Songti SC',serif;margin:20px 0 14px}.notes-intro p{font-size:12px;color:var(--muted);margin-bottom:20px;max-width:280px}.accordions{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;padding:20px 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#4e5c50;border-radius:4px;font-size:11px;color:#aab6aa}.password-row b{color:var(--cream);font:16px monospace;letter-spacing:.12em;margin-left:12px}.password-row button{border:0;background:none;color:var(--gold);font-size:11px;padding:4px}.download-card small{display:block;color:#8b9b91;font-size:10px;text-align:center;margin-top:14px}.download-note{font-size:10px;color:#93a196;margin-top:23px;line-height:2}.footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:30px;font-size:10px;color:#82928b}.footer b{font-size:13px;font-weight:500;color:#c0c9bb}.footer p{margin-top:5px}.footer a{color:#b4bfad}.skip{position:fixed;top:-100px;left:16px;background:var(--gold);color:#111;padding:12px;z-index:20}.skip:focus{top:12px}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#e1d0a7;color:#202923;padding:10px 24px;border-radius:6px;box-shadow:0 4px 25px #0007;z-index:25;font-size:13px}[hidden]{display:none!important}@media(min-width:1500px){.hero{padding-block:80px}.archive-caption{padding-block:32px}}@media(max-width:1000px){.shell{width:calc(100% - 40px)}.hero{gap:28px}h1{font-size:46px}.hero-actions{gap:15px}.hero-meta{font-size:9px}.hero .eyebrow{font-size:8px}.hero-lead{font-size:17px}nav{gap:18px}.notes-grid{gap:36px}.module{padding-inline:24px}}@media(max-width:720px){.shell{width:calc(100% - 32px)}.header{height:82px}.brand b{font-size:15px}.brand small{font-size:7px}.seal{width:34px;height:38px}nav>a:not(.nav-cta){display:none}.nav-cta{font-size:10px;padding:7px 10px}.hero{grid-template-columns:1fr;padding-block:34px;gap:30px}h1{font-size:48px;margin:20px 0}.hero-lead{font-size:19px}.hero .eyebrow{font-size:8px}.hero-meta{font-size:9px}.hero-actions{gap:22px}.archive-caption{font-size:18px;padding:20px}.status-bar>span:nth-child(2){display:none}.status-bar{font-size:10px}.section{padding-block:42px}.section-heading{display:block;margin-bottom:23px}.section-heading>p{margin-top:12px}h2{font-size:26px}.modules,.download-grid{grid-template-columns:1fr;gap:17px}.module{padding:25px 23px 0}.module h3{font-size:26px}.module-desc{padding-right:10px}.module-symbol{right:20px}.guide-section,.notes-section{padding-top:0}.notice{padding:17px;gap:12px}.guide-tabs{gap:20px}.steps{grid-template-columns:1fr;gap:22px;padding-block:24px}.steps article+article{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.steps article>span{font-size:18px}.steps h3{margin:8px 0}.notes-grid{grid-template-columns:1fr;gap:18px}.notes-intro{display:none}.download-section{padding-block:38px 30px}.download-card{padding:23px}.download-card h3{font-size:25px}.footer{flex-wrap:wrap;gap:20px}.footer>div:nth-child(2){order:3;width:100%}.footer>a{margin-left:auto}.toast{width:max-content;max-width:calc(100% - 32px);font-size:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}a,button{transition:none}}

/* Support system refinement */
.archive img{aspect-ratio:973/693;object-fit:cover}.module-symbol{width:88px;height:88px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;color:#d2bc8b44}.anchor-symbol{color:#b3acd455}.secondary{margin-top:10px;justify-content:space-between;border:1px solid #596758;color:#c6d0bf;background:transparent;font-size:12px;font-weight:400}.secondary:hover{background:#26342f}.footer{flex-wrap:wrap}.footer-fine{width:100%;display:flex;gap:24px;color:#778780;font-size:10px;opacity:.75;padding-top:5px}.footer-fine span+span{margin-left:auto}@media(max-width:720px){.module-symbol{width:74px;height:74px}.footer-fine{order:4;gap:16px;font-size:9px}}
.module-symbol{top:62px;width:72px;height:72px}@media(max-width:720px){.module-symbol{top:66px;width:64px;height:64px}}
/* Atmospheric artwork spans the header and hero, behind all content. */
body{position:relative;isolation:isolate}
body::before{content:"";position:absolute;z-index:-1;inset:0 0 auto;height:clamp(760px,65vw,1040px);pointer-events:none;background-image:linear-gradient(180deg,rgba(17,24,25,.18) 0%,rgba(17,24,25,.12) 42%,rgba(17,24,25,.8) 78%,#111819 100%),linear-gradient(90deg,rgba(17,24,25,.83) 0%,rgba(17,24,25,.68) 42%,rgba(17,24,25,.55) 100%),url('assets/duty-key-art.avif');background-size:cover;background-position:center top;background-repeat:no-repeat}
.hero-copy{ text-shadow:0 2px 18px rgba(0,0,0,.4)}
.hero-actions,.hero-meta{text-shadow:none}
.header .nav-cta{background:rgba(17,24,25,.5)}
@media(max-width:720px){body::before{height:900px;background-position:58% top;background-image:linear-gradient(180deg,rgba(17,24,25,.16) 0%,rgba(17,24,25,.25) 40%,#111819 100%),linear-gradient(90deg,rgba(17,24,25,.78),rgba(17,24,25,.62)),url('assets/duty-key-art.avif')}}