:root{--paper: #f6f4f0;--paper-2: #ffffff;--ink: #1f2430;--ink-soft: #6b7280;--line: #e6e2da;--accent: #00aaff;--accent-hanzi: #f100a1;--accent-vocab: #aa00ff;--radius: 12px;--shadow: 0 1px 3px rgba(20, 24, 40, .08), 0 4px 16px rgba(20, 24, 40, .05);--font-ui: "Noto Sans", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-hanzi: "Noto Serif SC", "Songti SC", "SimSun", serif;--maxw: 1080px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font-ui);background:var(--paper);color:var(--ink);line-height:1.6}a{color:inherit;text-decoration:none}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.nav .container,.nav{display:flex;align-items:center;justify-content:space-between;gap:16px}.nav .container{padding-top:12px;padding-bottom:12px}.brand{display:flex;flex-direction:column;line-height:1.1}.brand-zh{font-weight:700;font-size:1.1rem}.brand-en{font-size:.72rem;color:var(--ink-soft);letter-spacing:.06em;text-transform:uppercase}.nav-links{display:flex;gap:2px;flex-wrap:wrap}.nav-link{display:flex;flex-direction:column;align-items:center;padding:6px 12px;border-radius:8px;font-size:.9rem;line-height:1.2;transition:background .15s}.nav-link small{font-size:.64rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.04em}.nav-link:hover{background:#ece8e0}.nav-link.active{background:#e4eff7;color:var(--accent)}.nav-link.active small{color:var(--accent)}.page-head{padding:40px 0 24px}.kicker{font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft)}.page-head h1{margin:4px 0 8px;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.2}.page-head .sub{color:var(--ink-soft);max-width:40rem;margin:0}.grid{display:grid;gap:20px}.grid.cols-2{grid-template-columns:1fr 1fr}.grid.cols-3{grid-template-columns:repeat(3,1fr)}@media(max-width:760px){.grid.cols-2,.grid.cols-3{grid-template-columns:1fr}}.card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.card h2{margin:0 0 12px;font-size:1.05rem}.card h2 small{display:block;font-size:.7rem;color:var(--ink-soft);font-weight:500;text-transform:uppercase;letter-spacing:.08em}.action-card{display:block;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;transition:transform .15s,box-shadow .15s}.action-card:hover{transform:translateY(-2px);box-shadow:0 6px 24px #1418281a}.action-card .big{font-size:2.6rem;font-weight:800;line-height:1}.action-card .label{font-weight:700;font-size:1.1rem;margin-top:4px}.action-card .hint{color:var(--ink-soft);font-size:.85rem;margin-top:2px}.item-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}.item-card{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:0;background:var(--paper-2);border:1px solid var(--line);border-top:3px solid var(--item-color, #ccc);border-radius:var(--radius);padding:14px 8px;text-align:center;transition:transform .12s,box-shadow .12s}.item-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.item-card .glyph{font-family:var(--font-hanzi);font-size:1.35rem;font-weight:700;line-height:1.25;max-width:100%;overflow-wrap:anywhere}.item-card .pinyin{font-size:.78rem;color:var(--ink-soft)}.item-card .meaning{font-size:.78rem;color:var(--ink)}.detail-head{display:flex;align-items:flex-start;gap:24px;margin:8px 0 20px}.detail-glyph{font-family:var(--font-hanzi);font-size:clamp(2rem,6vw,3.8rem);font-weight:900;line-height:1.1;overflow-wrap:anywhere;color:var(--item-color, var(--ink))}.detail-pinyin{font-size:1.3rem;color:var(--ink-soft);margin:6px 0}.detail-meaning{font-size:1.15rem}.mnemonic-box{background:#fffbe9;border:1px solid #f0e6b8;border-radius:var(--radius);padding:16px 18px;margin:16px 0}.mnemonic-box .tag{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:#a9842f}.component-list{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.component-chip{font-family:var(--font-hanzi);font-size:1.2rem;padding:4px 12px;background:var(--paper);border:1px solid var(--line);border-radius:8px}.example-list{display:grid;gap:12px;margin:12px 0}.example{border-left:3px solid var(--line);padding:4px 0 4px 14px}.example .zh{font-family:var(--font-hanzi);font-size:1.15rem}.example .py{color:var(--ink-soft);font-size:.85rem}.example .en{color:var(--ink-soft);font-size:.9rem}.quiz-stage{max-width:640px;margin:0 auto;padding:24px 0 60px}.quiz-topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;color:var(--ink-soft);font-size:.85rem}.quiz-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 24px;text-align:center}.quiz-card .glyph{font-family:var(--font-hanzi);font-size:clamp(2.2rem,8vw,4rem);font-weight:900;line-height:1.15;overflow-wrap:anywhere;color:var(--item-color, var(--ink))}.quiz-card .prompt{margin-top:12px;color:var(--ink-soft)}.quiz-card .answer{margin-top:16px}.quiz-card .answer .pinyin{font-size:1.5rem}.quiz-card .answer .meaning{font-size:1.2rem;margin-top:4px}.quiz-card .mnemonic{margin-top:16px;font-size:.9rem;color:var(--ink-soft)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:10px;padding:12px 22px;font-size:1rem;font-weight:700;cursor:pointer;font-family:var(--font-ui);transition:filter .15s,transform .1s}.btn:hover{filter:brightness(1.05)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);color:#fff}.btn-wrong{background:#f100a1;color:#fff}.btn-right{background:#00b200;color:#fff}.btn-ghost{background:#ece8e0;color:var(--ink)}.btn-row{display:flex;gap:12px;justify-content:center;margin-top:24px}.result{text-align:center;padding:40px 20px}.result .pct{font-size:3rem;font-weight:800}.empty{color:var(--ink-soft);text-align:center;padding:40px 0}.srs-badge{display:inline-flex;align-items:center;gap:.4em;font-size:.7rem;font-weight:600;color:var(--badge, #999);background:color-mix(in srgb,var(--badge, #999) 12%,transparent);border:1px solid color-mix(in srgb,var(--badge, #999) 40%,transparent);padding:.1em .55em;border-radius:999px;line-height:1.5}.srs-badge .dot{width:.5em;height:.5em;border-radius:50%;background:var(--badge, #999)}.srs-dist{display:flex;flex-direction:column;gap:10px}.srs-row{display:flex;align-items:center;gap:10px;font-size:.88rem}.srs-row .dot{width:10px;height:10px;border-radius:3px;flex-shrink:0}.srs-row .dot.empty{background:var(--line)}.srs-row .name{font-weight:600;min-width:6.5rem}.srs-row .zh{color:var(--ink-soft);font-size:.78rem;min-width:2.5rem}.srs-row .track{flex:1;height:10px;background:var(--line);border-radius:999px;overflow:hidden}.srs-row .fill{display:block;height:100%;border-radius:999px;transition:width .4s ease}.srs-row .count{font-weight:700;font-variant-numeric:tabular-nums;min-width:2.4rem;text-align:right}.srs-row .count.zero{color:var(--ink-soft);font-weight:500}.srs-empty{color:var(--ink-soft);font-size:.9rem}#recent .chip-link{display:inline-flex;align-items:center;gap:6px;margin:4px;padding:6px 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}#recent .chip-link .g{font-family:var(--font-hanzi);font-size:1.1rem}.footer{border-top:1px solid var(--line);margin-top:60px;padding:28px 0;color:var(--ink-soft);font-size:.85rem}