:root{--bg:#fbf8f2;--card:#fff;--ink:#2b2b2b;--sub:#666;--line:#e7e1d6;--accent:#2f8f5b;--answer:#fff6dc;--answer-line:#f1c75b;--link:#1d6fa5;--radius:16px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic UI","Meiryo",sans-serif;line-height:1.85;font-size:16px;overflow-wrap:anywhere}
a{color:var(--link)}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.narrow{max-width:760px}
header.site{background:var(--card);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px}
.logo{font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px}
.logo svg{flex:none}
nav.top{display:flex;flex:none;white-space:nowrap}
nav.top a{color:var(--sub);text-decoration:none;font-size:.9rem;margin-left:14px}
nav.top a:hover{color:var(--ink)}
.hero{padding:26px 0 0}
.hero h1{font-size:1.7rem;line-height:1.4;margin:0 0 6px;word-break:auto-phrase}
.hero .lead{color:var(--ink);font-weight:700;margin:0 0 4px}
.hero p{margin:0;color:var(--sub)}
.guide{display:flex;gap:14px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin:18px 0 0}
.guide img{width:84px;flex:none}
.guide .name{font-weight:800}
.guide p{margin:2px 0 0;font-size:.92rem;color:var(--ink)}
.jump{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0;padding:0;list-style:none}
.jump a{display:inline-block;padding:6px 14px;border-radius:999px;background:var(--card);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:.9rem}
section.cat{padding:28px 0 8px}
section.cat h2{font-size:1.35rem;margin:0 0 4px;display:flex;align-items:center;gap:10px}
section.cat h2 .dot{width:12px;height:12px;border-radius:50%}
section.cat>p{margin:0 0 16px;color:var(--sub);font-size:.95rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.card{background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);text-decoration:none;color:var(--ink);display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,.08)}
.card img{aspect-ratio:16/9;object-fit:cover;width:100%;background:#eee}
.card .cb{padding:10px 14px 14px;display:flex;flex-direction:column;gap:4px;flex:1}
.card .cl{font-size:.72rem;font-weight:800;line-height:1.4;color:var(--cc,#555)}
.card .t{position:relative;padding-left:12px;font-weight:700;line-height:1.5;font-size:.98rem;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;line-clamp:3;overflow:hidden;min-height:4.5em}
.card .t:before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;background:var(--cm,#999)}
.search{margin:18px 0 0}
.search label{display:block;font-weight:700;font-size:.92rem;margin-bottom:6px}
.sbox{display:flex;gap:8px}
.sbox input{flex:1;min-width:0;font:inherit;font-size:16px;padding:10px 14px;border:2px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink)}
.sbox input:focus{outline:none;border-color:#c98a3a}
.sbox button{font:inherit;font-weight:700;padding:0 18px;border:0;border-radius:12px;background:#7a4f1c;color:#fff;cursor:pointer;flex:none;min-height:46px}
.sres{padding:18px 0 4px}
.sres h2{font-size:1.05rem;margin:0 0 12px;line-height:1.5}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0}
.chips a{display:inline-block;padding:6px 14px;border-radius:999px;background:var(--card);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:.9rem;line-height:1.5}
.chips a[aria-current]{background:var(--ink);color:#fff;border-color:var(--ink)}
.blk{padding:28px 0 4px}
.blk h2{font-size:1.3rem;margin:0 0 14px;line-height:1.4}
.blk-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.blk-h a{font-weight:700;font-size:.92rem;white-space:nowrap;text-decoration:none}
.ctiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.ctile{display:block;background:var(--card);border:1px solid var(--line);border-left:6px solid var(--c);border-radius:12px;padding:12px 16px;text-decoration:none;color:var(--ink)}
.ctile b{font-size:1.05rem}
.ctile .n{color:var(--sub);font-size:.85rem;margin-left:8px}
.ctile p{margin:4px 0 0;font-size:.88rem;color:var(--sub);line-height:1.6}
.lhead h1{font-size:1.5rem;line-height:1.4;margin:8px 0 4px}
.lhead p{margin:0;color:var(--sub);font-size:.95rem}
.lgrid{margin-top:20px}
.pager{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin:28px 0 0}
.pager a,.pager span{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 12px;border-radius:10px;border:1px solid var(--line);background:var(--card);text-decoration:none;color:var(--ink);font-weight:700}
.pager .cur{background:var(--ink);color:#fff;border-color:var(--ink)}
.pager .gap{border:0;background:none;min-width:0;padding:0 2px}
.crumb{font-size:.82rem;color:var(--sub);padding:14px 0 0}
.crumb a{color:var(--sub)}
article h1{font-size:1.65rem;line-height:1.45;margin:10px 0 16px;word-break:auto-phrase}
.say{display:flex;gap:10px;align-items:flex-end;margin:0 0 20px}
.say img{width:76px;flex:none}
.say .b{position:relative;background:var(--card);border:2px solid var(--accent);border-radius:18px;padding:10px 14px;font-weight:600;line-height:1.7;flex:1}
.say .b:before{content:"";position:absolute;left:-11px;bottom:22px;border:6px solid transparent;border-right:9px solid var(--accent)}
.say .who{display:block;font-size:.75rem;font-weight:800;color:var(--accent-dark,var(--accent));margin-bottom:2px}
.say.small img{width:60px}
.say.small .b{font-weight:500;font-size:.95rem;background:var(--pastel,#fff)}
.answer{background:var(--answer);border:2px solid var(--answer-line);border-radius:var(--radius);padding:16px 18px;margin:0 0 26px}
.answer .label{display:inline-flex;align-items:center;gap:6px;font-weight:800;font-size:.9rem;background:var(--answer-line);color:#4a3600;border-radius:999px;padding:2px 12px;margin-bottom:6px}
.answer .lead{display:flex;gap:10px;align-items:center;margin:4px 0 8px}
.answer .lead img{width:54px;flex:none}
.answer .lead span{font-weight:700;color:#6b4e00;font-size:.95rem}
.answer p{margin:0;font-size:1.05rem;font-weight:600}
figure.photo{margin:0 0 26px}
figure.photo img{border-radius:var(--radius);width:100%}
figure.photo figcaption{font-size:.85rem;margin-top:6px}
figure.photo .credit{display:block;font-size:.72rem;color:var(--sub);line-height:1.6;margin-top:2px}
figure.photo .credit a{color:var(--sub)}
article h2{font-size:1.2rem;margin:30px 0 10px;padding-left:12px;border-left:5px solid var(--accent);line-height:1.5}
article p{margin:0 0 14px}
.more{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:6px 18px 10px;margin:28px 0}
.more h2{border:none;padding:0;margin:12px 0 6px}
.more ul{margin:0;padding-left:1.2em}
.more li{margin:6px 0}
.sources{font-size:.9rem;color:var(--sub)}
.sources ol{padding-left:1.4em;margin:0}
.sources li{margin:6px 0}
.sources .pub{display:block;font-size:.8rem}
.note{font-size:.82rem;color:var(--sub)}
.share{margin:30px 0;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.share .h{font-weight:700;font-size:.95rem;margin-bottom:12px}
.share .btns{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.share a,.share button{font:inherit;font-size:.95rem;font-weight:700;display:flex;align-items:center;justify-content:center;min-height:46px;min-width:0;padding:8px 4px;border-radius:10px;text-decoration:none;border:0;cursor:pointer;color:#fff;line-height:1.2;white-space:nowrap;overflow-wrap:normal}
.share .s-wa{font-size:.8rem}
.share .s-native[hidden]{display:none}
.s-x{background:#000}.s-line{background:#06c755}.s-hatena{background:#00a4de}.s-fb{background:#1877f2}.s-wa{background:#25d366}.s-naver{background:#03c75a}
.s-native,.s-copy{grid-column:1/-1}
.s-native{background:var(--ink)}
.s-copy{background:transparent!important;color:var(--ink)!important;border:1px solid var(--line)!important}
.tip{margin:30px 0;padding:18px 16px;border:2px solid #7fb069;border-radius:14px;background:var(--card);text-align:center}
.tip .h{font-weight:700;font-size:1.05rem;margin-bottom:6px}
.tip p{margin:0 0 12px;font-size:.92rem}
.tip .tipbtn{display:block;padding:14px 10px;border-radius:12px;background:#4f7f3a;color:#fff;font-weight:700;font-size:1.05rem;text-decoration:none}
.tip .tipn{margin:8px 0 0;font-size:.78rem;color:var(--sub)}
.related{margin:30px 0 10px}
.related h2{border:none;padding:0}
.related .grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
footer.site{margin-top:48px;background:var(--card);border-top:1px solid var(--line);padding:24px 0 30px;font-size:.85rem;color:var(--sub)}
footer.site a{color:var(--sub);margin-right:14px}
.page h1{font-size:1.5rem}
.page h2{font-size:1.15rem;margin-top:28px}
.themebtn{display:none;font:inherit;font-size:1rem;line-height:1;background:none;border:1px solid var(--line);color:var(--ink);border-radius:999px;width:36px;height:36px;align-items:center;justify-content:center;cursor:pointer;flex:none;margin-left:12px;padding:0}
.js .themebtn{display:inline-flex}
.themebtn .sun{display:none}
nav.top{align-items:center}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#333;color:#fff;padding:10px 18px;border-radius:999px;font-size:.9rem;opacity:0;transition:opacity .2s;pointer-events:none}
.toast.on{opacity:1}
.quiz{background:var(--card);border:2px solid var(--accent);border-radius:var(--radius);padding:14px 16px 16px;margin:28px 0}
.quiz h2{border:none;padding:0;margin:0 0 6px;font-size:1.1rem}
.quiz .q{font-weight:700;margin:0 0 10px}
.quiz .opts{display:grid;gap:8px}
.quiz button.opt{font:inherit;text-align:left;min-height:46px;padding:8px 14px;border-radius:12px;border:2px solid var(--line);background:#fffdf8;cursor:pointer;color:var(--ink)}
.quiz button.opt:disabled{cursor:default}
.quiz button.opt.ok{border-color:#2f8f5b;background:#e9f6ee;font-weight:700}
.quiz button.opt.ng{border-color:#d98080;background:#fbecec}
.quiz .res{margin:12px 0 0}
.quiz .res b{display:block;margin-bottom:4px}
.quiz details{margin-top:10px}
.quiz .next{display:inline-block;margin-top:12px;font-weight:700}
.langs{background:var(--card);border-bottom:1px solid var(--line);font-size:.82rem}
.langs .wrap{display:flex;flex-wrap:wrap;gap:4px 14px;padding-top:6px;padding-bottom:6px}
.langs a{color:var(--sub);text-decoration:none}
.langs a[aria-current]{color:var(--ink);font-weight:700}
html[lang=en] body,html[lang=en] svg.dg{font-family:"Segoe UI","Helvetica Neue",Arial,"Noto Sans",sans-serif}
html[lang=zh-Hant] body,html[lang=zh-Hant] svg.dg{font-family:"PingFang TC","Microsoft JhengHei","Noto Sans TC",sans-serif}
html[lang=ko] body,html[lang=ko] svg.dg{font-family:"Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",sans-serif}
html[lang=ko] body,html[lang=ko] article h1{word-break:keep-all}
@media (max-width:600px){
  .hero h1{font-size:1.4rem}
  article h1{font-size:1.4rem}
  nav.top a{margin-left:12px;font-size:.85rem}
  .nav-about{display:none}
  .logo{font-size:.98rem}
  .grid{grid-template-columns:1fr 1fr;gap:12px}
  .card .cb{padding:8px 10px 12px}
  .card .t{font-size:.88rem;padding-left:10px}
  .lhead h1{font-size:1.3rem}
  .related .grid{grid-template-columns:1fr 1fr}
  .say img{width:64px}
  .say.small img{width:52px}
  .guide img{width:70px}
}
.c-animal{--cm:#2f8f5b;--cc:#1f6b43}.c-nature{--cm:#2a72b5;--cc:#1d5488}.c-science{--cm:#8a5cc2;--cc:#64409a}.c-food{--cm:#c9692c;--cc:#94481a}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#14171c;--card:#1d2228;--ink:#e6e8eb;--sub:#a9b3bd;--line:#2c333b;--answer:#2a2412;--answer-line:#c9a03a;--link:#8cc8f2;color-scheme:dark}:root:not([data-theme=light]) .answer .label{color:#1d1600}:root:not([data-theme=light]) .answer .lead span{color:#f0cf74}:root:not([data-theme=light]) .quiz button.opt{background:#232930}:root:not([data-theme=light]) .quiz button.opt.ok{background:#183524;border-color:#4cbf7d}:root:not([data-theme=light]) .quiz button.opt.ng{background:#3b1f1f;border-color:#d07a7a}:root:not([data-theme=light]) .say.small .b{background:#232930}:root:not([data-theme=light]) .say .who{color:var(--accent)}:root:not([data-theme=light]) figure.diagram{background:#fbfaf7;border:1px solid #3a4350;border-radius:14px;padding:12px 10px 10px;color:#222}:root:not([data-theme=light]) figure.diagram .fnote{color:#5d6670}:root:not([data-theme=light]) .chips a[aria-current],:root:not([data-theme=light]) .pager .cur{color:#14171c}:root:not([data-theme=light]) .s-native{background:#3a4350}:root:not([data-theme=light]) .s-x{box-shadow:inset 0 0 0 1px #3a4350}:root:not([data-theme=light]) .sbox button{background:#9a6526}:root:not([data-theme=light]) .card:hover{box-shadow:0 6px 18px rgba(0,0,0,.4)}:root:not([data-theme=light]) .themebtn .sun{display:inline}:root:not([data-theme=light]) .themebtn .moon{display:none}:root:not([data-theme=light]) .c-animal{--cc:#6fd19a}:root:not([data-theme=light]) .c-nature{--cc:#7ab8f0}:root:not([data-theme=light]) .c-science{--cc:#c3a3ec}:root:not([data-theme=light]) .c-food{--cc:#f0a46c}}:root[data-theme=dark]{--bg:#14171c;--card:#1d2228;--ink:#e6e8eb;--sub:#a9b3bd;--line:#2c333b;--answer:#2a2412;--answer-line:#c9a03a;--link:#8cc8f2;color-scheme:dark}:root[data-theme=dark] .answer .label{color:#1d1600}:root[data-theme=dark] .answer .lead span{color:#f0cf74}:root[data-theme=dark] .quiz button.opt{background:#232930}:root[data-theme=dark] .quiz button.opt.ok{background:#183524;border-color:#4cbf7d}:root[data-theme=dark] .quiz button.opt.ng{background:#3b1f1f;border-color:#d07a7a}:root[data-theme=dark] .say.small .b{background:#232930}:root[data-theme=dark] .say .who{color:var(--accent)}:root[data-theme=dark] figure.diagram{background:#fbfaf7;border:1px solid #3a4350;border-radius:14px;padding:12px 10px 10px;color:#222}:root[data-theme=dark] figure.diagram .fnote{color:#5d6670}:root[data-theme=dark] .chips a[aria-current],:root[data-theme=dark] .pager .cur{color:#14171c}:root[data-theme=dark] .s-native{background:#3a4350}:root[data-theme=dark] .s-x{box-shadow:inset 0 0 0 1px #3a4350}:root[data-theme=dark] .sbox button{background:#9a6526}:root[data-theme=dark] .card:hover{box-shadow:0 6px 18px rgba(0,0,0,.4)}:root[data-theme=dark] .themebtn .sun{display:inline}:root[data-theme=dark] .themebtn .moon{display:none}:root[data-theme=dark] .c-animal{--cc:#6fd19a}:root[data-theme=dark] .c-nature{--cc:#7ab8f0}:root[data-theme=dark] .c-science{--cc:#c3a3ec}:root[data-theme=dark] .c-food{--cc:#f0a46c}:root[data-theme=light]{color-scheme:light}
.cat-animal{--accent:#2f8f5b;--accent-dark:#1f6b43;--pastel:#eef8f1;--pastel2:#d5eedd}
.cat-nature{--accent:#2a72b5;--accent-dark:#1d5488;--pastel:#edf4fc;--pastel2:#d3e5f7}
.cat-science{--accent:#8a5cc2;--accent-dark:#64409a;--pastel:#f4effb;--pastel2:#e3d6f4}
.cat-food{--accent:#c9692c;--accent-dark:#94481a;--pastel:#fdf3ea;--pastel2:#f8dcc4}
figure.diagram{margin:26px auto;max-width:440px;background:#fff;border:1px solid var(--line,#e7e1d6);border-radius:18px;padding:12px 12px 10px}
figure.diagram figcaption{font-weight:800;font-size:.98rem;margin:2px 4px 10px;color:var(--accent-dark)}
figure.diagram .fnote{font-size:.8rem;color:#777;margin:8px 4px 0}
svg.dg{display:block;width:100%;max-width:440px;height:auto;margin:0 auto;font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic UI","Meiryo",sans-serif}
svg.dg text{font-size:18px;fill:#333}
svg.dg .tb{font-size:20px;font-weight:700}
svg.dg .tl{font-size:24px;font-weight:800}
svg.dg .tw{fill:#fff}
svg.dg .ta{fill:var(--accent-dark)}
svg.dg .ts{fill:#666}
svg.dg .card{fill:var(--pastel)}
svg.dg .box{fill:#fff;stroke:var(--accent);stroke-width:2}
svg.dg .boxa{fill:var(--accent)}
svg.dg .soft{fill:var(--pastel2)}
svg.dg .line{stroke:var(--accent);stroke-width:3;fill:none;stroke-linecap:round}
svg.dg .lineg{stroke:#b5b5b5;stroke-width:2;fill:none;stroke-dasharray:6 6}
svg.dg .arrowhead{fill:var(--accent)}
@media (max-width:600px){figure.diagram{padding:10px 0 8px;border:none;background:none}figure.diagram figcaption,figure.diagram .fnote{margin-left:2px;margin-right:2px}}