:root{--red:#840606;--red-d:#5E0404;--red-l:#F8EAEA;--ink:#161616;--mut:#5B5753;--line:#E5E0DA;--bg:#FBFAF8;--card:#fff;--ok:#1F6F43;--ok-l:#E4F2E9;--warn:#9A4A06;--warn-l:#FCEFE1;--gray-l:#F0EDEA}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 'Be Vietnam Pro',system-ui,sans-serif}
a{color:var(--red)}
button,input,select{font:inherit}
.hz{font-family:'Noto Serif SC',serif;font-weight:500}
.demo-bar{background:var(--ink);color:#fff;font-size:12px;padding:6px 16px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.demo-bar button{background:transparent;color:#fff;border:1px solid #fff6;border-radius:6px;padding:2px 8px;cursor:pointer;font-size:12px}
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.nav{max-width:1180px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700}
.brand i{font-style:normal;width:38px;height:38px;border-radius:50%;background:var(--red);color:#fff;display:grid;place-items:center;font-family:'Noto Serif SC',serif;font-size:19px}
.nav .links{display:flex;gap:4px;flex-wrap:wrap;flex:1}
.nav .links a{padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:500;font-size:14px}
.nav .links a.on{background:var(--red-l);color:var(--red);font-weight:700}
.who{font-size:13px;color:var(--mut);display:flex;gap:8px;align-items:center}
main{max-width:1180px;margin:0 auto;padding:24px 16px 64px}
h1{font-size:28px;margin:0 0 4px}h2{font-size:20px;margin:0 0 8px}h3{font-size:16px;margin:0 0 6px}
p{margin:0 0 8px}.mut{color:var(--mut)}.sm{font-size:13px}
.btn{display:inline-flex;align-items:center;gap:6px;min-height:42px;padding:0 16px;border-radius:999px;border:1px solid var(--red);background:var(--red);color:#fff;font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--red-d)}
.btn.o{background:#fff;color:var(--red)}.btn.o:hover{background:var(--red-l)}
.btn.g{background:#fff;color:var(--ink);border-color:var(--line)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.sm{min-height:34px;padding:0 12px;font-size:13px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.cols{display:flex;gap:24px;flex-wrap:wrap;align-items:flex-start}
.cols>.main{flex:999 1 560px;min-width:0}.cols>.side{flex:1 1 280px;min-width:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.stack{display:flex;flex-direction:column;gap:12px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.chip{font-size:12px;font-weight:600;padding:2px 10px;border-radius:999px;background:var(--gray-l);color:var(--mut);white-space:nowrap}
.chip.r{background:var(--red-l);color:var(--red)}.chip.ok{background:var(--ok-l);color:var(--ok)}.chip.w{background:var(--warn-l);color:var(--warn)}
.spec{font-size:11px;padding:1px 7px;border-radius:6px;border:1px dashed #3F6E66;color:#2F5751;background:#EEF6F4;white-space:nowrap}
.bar{height:8px;border-radius:4px;background:var(--gray-l);display:flex;overflow:hidden}
.bar span{display:block;height:100%}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--mut)}
.legend b{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px}
.stat3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat3 div{background:var(--bg);border-radius:12px;padding:10px;text-align:center}
.stat3 strong{display:block;font-size:24px}
.list{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
.list>*{display:flex;gap:12px;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line);text-decoration:none;color:inherit}
.list>*:last-child{border-bottom:0}
.list>a:hover{background:var(--bg)}
.list .lock{color:#99928B}
.num{min-width:72px;font-weight:700}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 16px}
.tabs a{padding:8px 14px;border-radius:999px;border:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:14px;background:#fff}
.tabs a.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.crumb{font-size:13px;color:var(--mut);margin-bottom:6px}.crumb a{text-decoration:none}
.word{display:flex;gap:16px;align-items:center}
.word .hz{font-size:30px;min-width:80px}
.big{font-size:80px;line-height:1.1}
.opt{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.opt button{min-height:56px;padding:8px 16px;border-radius:12px;border:2px solid var(--line);background:#fff;text-align:left;cursor:pointer;font-size:16px}
.opt button.ok{border-color:var(--ok);background:var(--ok-l)}.opt button.bad{border-color:var(--warn);background:var(--warn-l)}
.fb{padding:12px 14px;border-radius:10px;font-weight:600}.fb.ok{background:var(--ok-l);color:var(--ok)}.fb.bad{background:var(--warn-l);color:var(--warn)}
.flip{min-height:300px;width:100%;border-radius:20px;border:1px solid var(--line);background:#fff;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:24px}
label.f{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--mut)}
label.f input,label.f select{min-height:44px;border:1px solid #D6CFC8;border-radius:10px;padding:0 12px;font-size:15px;color:var(--ink);background:#fff}
.err{color:var(--warn);font-size:13px;font-weight:600}
table{width:100%;border-collapse:collapse;background:#fff;font-size:14px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
th{font-size:12px;color:var(--mut);font-weight:600}
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
/* landing */
.hero{background:linear-gradient(135deg,var(--red),var(--red-d));color:#fff;border-radius:24px;padding:48px 32px;display:flex;gap:24px;flex-wrap:wrap;align-items:center;position:relative;overflow:hidden}
.hero h1{font-size:38px;line-height:1.2}
.hero .seal{font-family:'Noto Serif SC',serif;font-size:140px;opacity:.15;position:absolute;right:24px;bottom:-30px;line-height:1}
.hero .btn{background:#fff;color:var(--red);border-color:#fff}.hero .btn.o{background:transparent;color:#fff;border-color:#fff}
section.l{margin-top:40px}
.ph{border:1px dashed #C9BFB6;border-radius:14px;padding:16px;color:var(--mut);font-size:13px;background:#fff}
#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;opacity:0;transition:opacity .2s;pointer-events:none;max-width:90vw}
#toast.on{opacity:1}
@media (max-width:600px){.hero{padding:32px 20px}.hero h1{font-size:28px}.big{font-size:64px}h1{font-size:24px}}