:root{--ink:#1d1a17;--muted:#6b635a;--paper:#f8f4ec;--card:#fffdf8;--line:#e6dccb;--red:#b3201f;--red-d:#8e1715;--gold:#9c6d10;
--serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Noto Serif SC","Songti SC",serif;
--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Noto Sans SC",sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.7 var(--sans)}
img{max-width:100%;height:auto;display:block}
a{color:var(--red)}a:hover{color:var(--red-d)}
h1,h2,h3{font-family:var(--serif);line-height:1.25;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.6vw,2.9rem);margin:.2em 0 .4em}
h2{font-size:clamp(1.45rem,3.2vw,1.9rem);margin:2.2em 0 .6em;padding-top:.6em;border-top:1px solid var(--line)}
h3{font-size:1.2rem;margin:0 0 .3em}
[lang^=zh]{font-family:"Noto Serif SC","Songti SC","Noto Serif TC","PMingLiU",serif;font-style:normal}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 20px}
/* header */
.site-header{background:var(--card);border-bottom:3px solid var(--red);position:sticky;top:0;z-index:10}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--serif);font-weight:700;font-size:1.1rem}
.seal{background:var(--red);color:#fff;border-radius:6px;padding:2px 7px;font-size:.95rem}
nav{display:flex;gap:4px 16px;flex-wrap:wrap;font-size:.92rem}
nav a{color:var(--muted);text-decoration:none;padding:6px 0}
nav a:hover,nav a[aria-current]{color:var(--red)}
@media (max-width:760px){nav{width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px;-webkit-overflow-scrolling:touch}nav a{white-space:nowrap}.site-header{position:static}}
/* buttons + CTA */
.btn{display:inline-block;background:var(--red);color:#fff;text-decoration:none;font-weight:700;padding:14px 24px;border-radius:999px;box-shadow:0 3px 0 var(--red-d);transition:transform .1s}
.btn:hover{color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--red);border:2px solid var(--red);box-shadow:none}
.btn-ghost:hover{color:var(--red-d)}
.cta{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--red);border-radius:12px;padding:22px 24px;margin:2.2em 0}
.cta-free{border-left-color:var(--gold)}
.cta-title{font-family:var(--serif);font-size:1.3rem;font-weight:700;margin:0 0 .2em}
.cta-inline{margin:.8em 0 1.4em}
/* article */
.post{padding:28px 20px 40px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;color:var(--red);font-weight:700;margin:0}
.lede{font-size:1.18rem;color:#3b352f}
.byline{color:var(--muted);font-size:.9rem}
.post p,.post li{max-width:70ch}
.post ul,.post ol{padding-left:1.3em}
.post li{margin:.3em 0}
.note{background:#fff6e0;border:1px solid #efd9a6;border-radius:10px;padding:14px 18px;font-size:.96rem}
.hero-pin{max-width:360px;margin:18px auto}.hero-pin .pin{margin:0 auto}
.pin{position:relative;margin:1.6em auto;max-width:420px}
.pin img{border-radius:12px;box-shadow:0 8px 28px rgba(60,40,20,.15)}
.pin figcaption{text-align:center;color:var(--muted);font-size:.85rem;margin-top:8px}
.pinit{position:absolute;top:12px;right:12px;background:#e60023;color:#fff;text-decoration:none;font-size:.82rem;font-weight:700;padding:7px 12px;border-radius:999px;opacity:.95}
.pinit:hover{color:#fff;opacity:1}
.pins-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin:1.4em 0}
.pins-row .pin{margin:0}
/* word cards */
.words{display:grid;gap:14px;margin:1.2em 0}
.word{display:grid;grid-template-columns:minmax(140px,220px) 1fr;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;scroll-margin-top:80px}
.glyphs{display:flex;flex-direction:column;gap:8px;justify-content:center}
.glyphs figure{margin:0;background:#fff;border:1px solid #efe7d8;border-radius:10px;padding:10px;display:flex;flex-direction:column;align-items:center}
.glyphs img{max-height:90px;width:auto;object-fit:contain}
.glyphs figcaption{font-size:.72rem;color:var(--muted);margin-top:4px;text-align:center}
.word h3 .num{color:var(--red);font-family:var(--sans);font-size:.8rem;font-weight:700;vertical-align:middle;margin-right:4px}
.word h3 .forms{color:var(--red);margin-left:6px;font-weight:400}
.word .sep{color:var(--muted)}
.word p{margin:.25em 0;font-size:.96rem}
.pinyin em{font-style:normal;font-weight:700;color:var(--gold)}
.mistake{background:#fbefe9;border-radius:8px;padding:8px 12px;margin-top:.5em!important}
@media (max-width:560px){.word{grid-template-columns:1fr}.glyphs{flex-direction:row}.glyphs figure{flex:1}}
/* home */
.hero{padding:48px 0 30px;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem)}
.hero .lede{font-size:1.2rem}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.hero .pin{margin:0 auto;max-width:340px}
@media (max-width:860px){.hero{grid-template-columns:1fr;padding-top:28px}}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;margin:1.2em 0 2em}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;transition:box-shadow .15s}
.card:hover{box-shadow:0 10px 30px rgba(60,40,20,.14);color:var(--ink)}
.card img{aspect-ratio:2/3;object-fit:cover;width:100%}
.card .c-body{padding:16px 18px 20px}
.card h3{margin:0 0 .3em}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.section{padding:20px 0}
.section h2{border-top:0;margin-top:1.2em}
.trust{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.trust div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.trust strong{font-family:var(--serif);font-size:1.05rem;display:block;margin-bottom:4px}
.themes{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.themes a{text-decoration:none;color:var(--ink);font-size:.9rem;text-align:center}
.themes img{border-radius:10px;aspect-ratio:2/3;object-fit:cover;width:100%;margin-bottom:6px;box-shadow:0 4px 14px rgba(60,40,20,.12)}
.product{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px}
.product img{border-radius:10px}
@media (max-width:760px){.product{grid-template-columns:1fr}}
/* footer */
.site-footer{border-top:1px solid var(--line);margin-top:50px;padding:26px 0 40px;color:var(--muted);font-size:.92rem}
.small{font-size:.82rem}
.literal{font-family:var(--serif);font-style:italic;color:#3b352f}