:root{--bg: #f6f8fc;--surface: #ffffff;--ink: #1f2430;--muted: #5c6270;--line: #e6e9f0;--brand: #4361ee;--brand-ink: #2f3fb8;--brand-2: #4cc9f0;--accent: #ff6b6b;--focus: #1d4ed8;--radius: 16px;--radius-sm: 10px;--shadow: 0 6px 20px rgba(31, 36, 48, .08);--shadow-lg: 0 14px 40px rgba(31, 36, 48, .14);--container: 1120px;--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}[hidden]{display:none!important}img{max-width:100%;display:block}a{color:var(--brand-ink)}.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:20px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}:where(a,button,input,select,summary):focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}.skip-link{position:absolute;left:12px;top:-48px;background:var(--brand);color:#fff;padding:10px 16px;border-radius:10px;z-index:100;transition:top .15s}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:40;background:#ffffffe6;backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}.site-header .bar{display:flex;align-items:center;gap:16px;height:64px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none}.brand .logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;font-size:20px}.header-grade{display:flex;align-items:center;gap:6px;margin-left:auto;color:var(--muted);font-size:.78rem;font-weight:700}.header-grade select{max-width:92px;padding:7px 26px 7px 9px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit}.header-locale select{max-width:100px;padding:7px 24px 7px 9px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit}.nav{display:flex;align-items:center;gap:6px}.nav a{color:var(--muted);text-decoration:none;padding:8px 12px;border-radius:10px;font-weight:600;font-size:.95rem}.nav a:hover{color:var(--ink);background:#eef1f8}.nav-toggle{display:none;margin-left:auto;background:#eef1f8;border:0;width:44px;height:44px;border-radius:12px;font-size:20px;cursor:pointer}@media(max-width:820px){.site-header .bar{gap:10px}.brand{min-width:0;font-size:1rem}.brand>span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-grade{margin-left:auto}.header-grade>span{display:none}.nav-toggle{display:block}.nav{position:fixed;inset:64px 0 auto;flex-direction:column;align-items:stretch;background:var(--surface);border-bottom:1px solid var(--line);padding:10px 20px 18px;gap:2px;box-shadow:var(--shadow);transform:translateY(-120%);transition:transform .2s ease}.nav[data-open=true]{transform:translateY(0)}.nav a{padding:12px;font-size:1.05rem}}.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;font-weight:700;font-size:.95rem;padding:11px 18px;border-radius:12px;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:transform .06s ease,background .15s ease,box-shadow .15s}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px #4361ee47}.btn-primary:hover{background:var(--brand-ink)}.btn-ghost{background:#eef1f8;color:var(--ink)}.btn-ghost:hover{background:#e2e7f4}.btn-block{width:100%}.btn-lg{padding:14px 24px;font-size:1.05rem}.hero{padding:56px 0 28px;text-align:center}.hero h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.08;margin:0 0 14px;letter-spacing:-.02em}.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:640px;margin:0 auto 26px}.searchbar{display:flex;gap:10px;max-width:620px;margin:0 auto}.searchbar input{flex:1;padding:15px 18px;border-radius:14px;border:1px solid var(--line);font-size:1.05rem;background:#fff;box-shadow:var(--shadow)}.section{padding:36px 0}.section h2{font-size:1.6rem;margin:0 0 4px;letter-spacing:-.01em}.section .sub{color:var(--muted);margin:0 0 22px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:20px}.section-head h2{margin:0}.chips{display:flex;flex-wrap:wrap;gap:10px}.chip{display:inline-flex;align-items:center;gap:8px;padding:9px 15px;border-radius:999px;background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none;font-weight:700;font-size:.92rem;box-shadow:var(--shadow)}.chip:hover{border-color:var(--brand);color:var(--brand-ink)}.chip[aria-pressed=true],.chip.is-active{background:var(--brand);color:#fff;border-color:var(--brand)}.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .12s ease,box-shadow .12s ease}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}.card .thumb{aspect-ratio:4 / 3;background:linear-gradient(135deg,var(--c1, #7ec8e3),var(--c2, #ffe08a));display:grid;place-items:center;position:relative;overflow:hidden}.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease}.card:hover .thumb img{transform:scale(1.02)}.card .thumb .type-badge{position:absolute;top:10px;left:10px;background:#ffffffeb;color:var(--ink);font-weight:700;font-size:.72rem;padding:4px 10px;border-radius:999px}.thumbnail-preview{position:fixed;z-index:100;width:min(340px,calc(100vw - 32px));pointer-events:none;visibility:hidden;opacity:0;transform:translateY(6px);transition:opacity .14s ease,transform .14s ease;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow-lg);overflow:hidden}.thumbnail-preview[data-open=true]{visibility:visible;opacity:1;transform:translateY(0)}.thumbnail-preview img{display:block;width:100%;aspect-ratio:8.5 / 11;object-fit:contain;background:#fff}.thumbnail-preview span{display:block;padding:9px 12px;color:var(--ink);font-size:.82rem;font-weight:700;border-top:1px solid var(--line)}.card .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1}.card .body h3{margin:0;font-size:1.1rem;line-height:1.25}.card .body h3 a{color:var(--ink);text-decoration:none}.card .body h3 a:hover{color:var(--brand-ink)}.card .meta{display:flex;flex-wrap:wrap;gap:6px}.badge{font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;background:#eef1f8;color:var(--muted)}.card .actions{display:flex;gap:8px;margin-top:auto;padding-top:6px}.card .actions .btn{flex:1;padding:10px 12px;font-size:.88rem;border-radius:10px;box-shadow:none}.btn-primary{background:linear-gradient(135deg,var(--brand),#4b6be6);color:#fff;box-shadow:0 8px 18px #4361ee33}.btn-primary:hover{background:linear-gradient(135deg,var(--brand-ink),#3f58d2)}.cat-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.cat{display:flex;align-items:center;gap:14px;padding:18px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);text-decoration:none;color:var(--ink);box-shadow:var(--shadow)}.cat:hover{border-color:var(--brand);transform:translateY(-2px)}.cat .ic{font-size:30px;width:52px;height:52px;border-radius:14px;background:#eef1f8;display:grid;place-items:center}.cat b{display:block;font-size:1.02rem}.cat span{color:var(--muted);font-size:.86rem}.filters{position:sticky;top:64px;z-index:20;background:var(--bg);padding:16px 0;border-bottom:1px solid var(--line);margin-bottom:24px}.filters .row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.filters input[type=search]{flex:1;min-width:220px;padding:12px 16px;border-radius:12px;border:1px solid var(--line);font-size:1rem;background:#fff}.filters select{padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:.95rem;font-weight:600}.collection-filters{margin-top:12px}.filter-clear{min-height:45px}@media(max-width:640px){.filters{position:static;padding:12px 0}.filters .row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.filters input[type=search]{grid-column:1 / -1;min-width:0;width:100%}.filters 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.desc{color:var(--muted);font-size:1.05rem}.detail .cta{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}.detail .info{margin-top:22px;border-top:1px solid var(--line);padding-top:18px;display:grid;gap:8px}.detail .info div{display:flex;gap:10px;font-size:.95rem}.detail .info b{min-width:96px;color:var(--muted);font-weight:600}@media(max-width:780px){.detail{grid-template-columns:1fr}}.variants{display:grid;gap:12px}.variant-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.variant-row .g{font-weight:700}.variant-row .links{display:flex;gap:8px;flex-wrap:wrap}.ad{margin:24px auto;text-align:center;min-height:90px;display:grid;place-items:center;background:repeating-linear-gradient(45deg,#eef1f8,#eef1f8 10px,#e9edf7 10px 20px);border:1px dashed var(--line);border-radius:12px;color:var(--muted);font-size:.82rem}.ad[data-filled=true]{background:none;border:0}.site-footer{margin-top:48px;background:#0f1526;color:#c7ccda;padding:40px 0 28px}.site-footer a{color:#e6e9f2;text-decoration:none}.site-footer a:hover{text-decoration:underline}.site-footer .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px}.site-footer h4{color:#fff;font-size:.95rem;margin:0 0 12px}.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:.9rem}.site-footer .legal{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:.82rem;color:#99a1b3;display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:space-between}@media(max-width:720px){.site-footer .cols{grid-template-columns:1fr}}.breadcrumbs{font-size:.85rem;color:var(--muted);padding:18px 0 0}.breadcrumbs a{color:var(--muted);text-decoration:none}.breadcrumbs a:hover{color:var(--ink)}.modal{position:fixed;inset:0;background:#0f15268c;display:none;place-items:center;z-index:60;padding:20px}.modal[data-open=true]{display:grid}.modal .box{background:#fff;border-radius:18px;padding:26px;max-width:420px;width:100%;text-align:center;box-shadow:var(--shadow-lg)}.modal .box h3{margin:0 0 8px}.modal .box p{color:var(--muted);margin:0 0 18px}.spinner{width:34px;height:34px;border:4px solid #e6e9f0;border-top-color:var(--brand);border-radius:50%;margin:6px auto 16px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.prose{max-width:760px;margin-inline:auto;padding:28px 20px 12px}.prose h1{font-size:2rem;letter-spacing:-.02em;margin:0 0 6px}.prose h2{margin-top:1.7em;font-size:1.3rem}.prose p,.prose li{color:#3a4050}.prose ul{padding-left:1.2em}.prose .updated{color:var(--muted);font-size:.9rem;margin-bottom:1.4em}.notfound{text-align:center;padding:80px 20px}.notfound h1{font-size:3rem;margin:0}.rich{max-width:900px}.rich h2{font-size:1.4rem;margin:1.6em 0 .5em;letter-spacing:-.01em}.rich h3{font-size:1.08rem;margin:1.1em 0 .3em}.rich>p{color:#3a4050;line-height:1.7}.rich ul{padding-left:1.2em;color:#3a4050;line-height:1.6}.rich ul li{margin:.35em 0}.rich .lede{font-size:1.08rem}.word-list{list-style:none;padding:0;margin:10px 0 0;display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.word-list li{display:flex;gap:10px;align-items:baseline;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 13px}.word-list .term{font-weight:800;text-transform:uppercase;letter-spacing:.03em;color:var(--brand-ink);font-size:.82rem;white-space:nowrap}.word-list .clue{color:#3a4050;font-size:.95rem;line-height:1.4}.word-chips{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:10px 0 0;list-style:none}.word-chips li{border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:.85rem;font-weight:600;background:var(--surface);text-transform:capitalize}.clue-list{padding-left:1.2em;margin:10px 0 0;color:#3a4050}.clue-list li{margin:.35em 0}.faq{display:grid;gap:10px;margin-top:10px}.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);padding:0 16px}.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--muted);font-weight:700;font-size:1.2rem}.faq details[open] summary:after{content:"–"}.faq details>p{margin:0 0 14px;color:#3a4050;line-height:1.6}.grade-guide{list-style:none;padding:0;margin:10px 0 0;display:grid;gap:8px}.grade-guide li{border-left:3px solid var(--brand);padding:4px 0 4px 12px;color:#3a4050;line-height:1.5}.callout{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;background:#f2f6ff;margin-top:16px}.callout :last-child{margin-bottom:0}.guide-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));margin-top:8px}.guide-card{display:block;border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:var(--surface);box-shadow:var(--shadow);color:inherit;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease}.guide-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.guide-card h3{margin:6px 0 8px;font-size:1.12rem}.guide-card p{margin:0;color:var(--muted);font-size:.95rem;line-height:1.5}.kicker{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--brand-ink)}