:root{--bg:#fff;--surface:#f5f7fb;--fg:#172033;--muted:#5e6a80;--line:#dde3ee;--accent:#0b6fe6;--accent-soft:#e6f0fd;--ok:#00a7c4;--ok-soft:#dff6fa;--ng:#e5484d;--ng-soft:#fdecec;--sel:#ffe9a6;--sel-line:#f0a020;--sans:"Inter", "Noto Sans JP", system-ui, sans-serif;--zh:"Noto Sans SC", "PingFang SC", sans-serif;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#10141c;--surface:#19202b;--fg:#e9edf4;--muted:#9aa5b8;--line:#2b3444;--accent:#4d9bff;--accent-soft:#16263d;--ok:#3cc8de;--ok-soft:#12313a;--ng:#ff6b6f;--ng-soft:#3a1a1c;--sel:#4a3b10;--sel-line:#d99a1e;color-scheme:dark}}*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--fg);font:16px/1.6 var(--sans)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}[lang=zh-Hans],.zh{font-family:var(--zh)}.topbar{background:var(--accent);color:#fff;padding-top:env(safe-area-inset-top,0px)}.topbar-inner{max-width:880px;padding:12px max(16px, env(safe-area-inset-right,0px)) 12px max(16px, env(safe-area-inset-left,0px));align-items:center;gap:16px;margin:0 auto;display:flex}.brand{color:#fff;font-size:18px;font-weight:700}.nav-app{color:#fff;margin-left:auto;font-size:14px;font-weight:600}.langs{gap:12px;font-size:14px;display:flex}.langs a{color:#fffc}.langs a[aria-current]{color:#fff;font-weight:700;text-decoration:underline}.crumbs{max-width:880px;color:var(--muted);flex-wrap:wrap;gap:6px;margin:12px auto 0;padding:0 16px;font-size:13px;display:flex}.page{max-width:880px;padding:16px max(16px, env(safe-area-inset-right,0px)) 48px max(16px, env(safe-area-inset-left,0px));margin:0 auto}.foot{border-top:1px solid var(--line);color:var(--muted);text-align:center;padding:20px 16px 40px;font-size:12px}h1{text-wrap:balance;margin:8px 0;font-size:26px;line-height:1.3}h2{margin:28px 0 10px;font-size:18px}.lead{color:var(--muted);margin:0 0 18px}.levels{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;display:grid}.level-card{border:1.5px solid var(--c);background:linear-gradient(var(--c-soft), var(--bg));color:var(--fg);border-radius:18px;align-items:baseline;gap:6px;padding:18px 20px;display:flex}.level-card:hover{text-decoration:none;transform:translateY(-1px)}.level-card b{font-size:40px;line-height:1}.level-card .meta{text-align:right;color:var(--muted);margin-left:auto;font-size:13px;line-height:1.4}.list{border:1px solid var(--line);border-radius:14px;overflow:hidden}.list>*{border-top:1px solid var(--line);color:var(--fg);align-items:center;gap:12px;padding:12px 16px;display:flex}.list>:first-child{border-top:0}.list a:hover{background:var(--surface);text-decoration:none}.list .sub{color:var(--muted);font-size:13px}.list .grow{flex:1;min-width:0}.list .chev{color:var(--accent)}.list .disabled{opacity:.5}.pill{background:var(--surface);color:var(--muted);white-space:nowrap;border-radius:99px;padding:1px 8px;font-size:12px}.pill.soon{color:#a35a00;background:#fff2dd}.parts{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;display:grid}.parts a{border:1px solid var(--line);color:var(--fg);font-variant-numeric:tabular-nums;border-radius:12px;padding:12px 14px;display:block}.parts a:hover{border-color:var(--accent);text-decoration:none}.parts small{color:var(--muted);display:block}.qlist{counter-reset:q;flex-direction:column;gap:10px;display:flex}.qlist article{border:1px solid var(--line);border-radius:12px;padding:12px 14px}.qlist .qnum{color:var(--muted);margin:0;font-size:12px}.qlist .passage-text{white-space:pre-wrap;background:var(--surface);border-radius:8px;padding:8px 10px}.qlist img{border-radius:6px;max-width:260px;height:auto}.qlist summary{cursor:pointer;color:var(--accent);margin-top:6px;font-size:14px}.qlist .stem{font-size:17px}.qlist ol{margin:6px 0;padding-left:1.6em}.note{color:var(--muted);font-size:13px}.sr{color:var(--muted)}.app-banner{border:1px solid var(--line);background:var(--surface);border-radius:16px;align-items:flex-start;gap:16px;margin:32px 0 8px;padding:16px 18px;display:flex}.app-banner.compact{align-items:center;max-width:600px;margin:20px auto 8px}.app-icon{border-radius:15px;flex:none;width:64px;height:64px}.app-banner.compact .app-icon{border-radius:12px;width:52px;height:52px}.app-text{flex-direction:column;gap:6px;min-width:0;display:flex}.app-name{flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin:0;font-size:17px;font-weight:700;display:flex}.app-name a{color:var(--fg)}.app-name span{color:var(--muted);font-size:13px;font-weight:400}.app-lead{color:var(--muted);margin:0;font-size:14px}.store-btns{flex-wrap:wrap;gap:8px;display:flex}.store-btn{background:var(--fg);color:var(--bg);border:1.5px solid var(--fg);border-radius:10px;align-items:center;gap:6px;padding:7px 14px;font-size:14px;font-weight:600;display:inline-flex}.store-btn.outline{color:var(--fg);background:0 0}.store-btn svg{width:18px;height:18px}.store-btn:hover{opacity:.85;text-decoration:none}.app-intro{border:1px solid var(--line);background:var(--surface);border-radius:18px;margin:40px 0 8px;padding:22px 20px}.app-intro-head{align-items:flex-start;gap:16px;display:flex}.app-intro-head .app-icon{border-radius:17px;width:72px;height:72px}.app-intro h2{margin:0 0 6px}.app-intro-lead{color:var(--muted);margin:0;font-size:15px}.app-features{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin:18px 0;padding:0;list-style:none;display:grid}.app-features li{border:1px solid var(--line);background:var(--bg);border-radius:12px;flex-direction:column;gap:3px;padding:12px 14px;font-size:14px;display:flex}.app-features b{font-size:15px}.app-features li>span:last-child{color:var(--muted)}.app-f-icon{font-size:20px}.app-intro .store-btns{align-items:center}@media (width<=520px){.app-intro-head{flex-direction:column}}.mock-link{border:1.5px solid var(--accent);background:var(--accent-soft);color:var(--fg);border-radius:14px;margin:4px 0 8px;padding:14px 16px;display:block}.mock-link:hover{text-decoration:none}.mock-link-title{color:var(--accent);font-size:18px;font-weight:700;display:block}.mock-link-sub{color:var(--muted);font-size:13px;display:block}.mock-levels{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;display:grid}.mock-levels a{border:1px solid var(--line);color:var(--fg);border-radius:12px;padding:12px 14px;font-weight:600;display:block}.mock-levels a:hover{border-color:var(--accent);text-decoration:none}html:lang(ko) body{font-family:Inter,Noto Sans KR,system-ui,sans-serif}html:lang(th) body{font-family:Inter,Noto Sans Thai,system-ui,sans-serif}.policy{max-width:70ch}.policy h2{margin-top:26px;font-size:17px}.policy li{margin:4px 0}.instr-tr{color:var(--muted);margin-left:.8em;font-size:.92em}button,a,label{-webkit-tap-highlight-color:transparent;touch-action:manipulation}@media (width<=600px){.instr-tr{margin:2px 0 0;display:block}.instr-tr+br{display:none}.app-banner.compact{gap:12px;padding:12px 14px}.app-banner.compact .store-btns{flex-wrap:nowrap}.app-banner.compact .store-btn{padding:6px 10px;font-size:13px}.topbar-inner{gap:12px}.brand{white-space:nowrap;font-size:17px}.langs{gap:10px;font-size:13px}.nav-app{font-size:13px}}