:root{--bg:#f4f6f4;--surface:#fff;--surface-2:#eef2ef;--text:#17201c;--muted:#55625b;--line:#d6dcd7;--accent:#0a6b5a;--accent-ink:#fff;--accent-soft:#dcefe9;--warn:#8a5300;--warn-soft:#fbf0dc;--note-soft:#e8eef6;--note:#2b4b72;--radius:8px;--font:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;--mono:ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace;color-scheme:light dark}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0e1411;--surface:#151d19;--surface-2:#1b2520;--text:#e5ebe7;--muted:#9aa9a1;--line:#2a3630;--accent:#4cc7a8;--accent-ink:#06231b;--accent-soft:#17332c;--warn:#f0b45a;--warn-soft:#2f2410;--note-soft:#172435;--note:#9dbbe3}}:root[data-theme=dark]{--bg:#0e1411;--surface:#151d19;--surface-2:#1b2520;--text:#e5ebe7;--muted:#9aa9a1;--line:#2a3630;--accent:#4cc7a8;--accent-ink:#06231b;--accent-soft:#17332c;--warn:#f0b45a;--warn-soft:#2f2410;--note-soft:#172435;--note:#9dbbe3}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font:17px/1.85 var(--font);overflow-wrap:anywhere;margin:0}a{color:var(--accent);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:3px}img,svg{max-width:100%;height:auto}.skip{background:var(--accent);color:var(--accent-ink);z-index:10;padding:8px 14px;position:absolute;top:0;left:-999px}.skip:focus{top:8px;left:8px}.wrap{width:100%;max-width:1000px;margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--line);border-top:3px solid var(--accent)}.site-header .wrap{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 20px;padding-top:10px;padding-bottom:10px;display:flex}.brand{color:var(--text);align-items:baseline;gap:8px;text-decoration:none;display:inline-flex}.brand b{letter-spacing:.02em;font-size:1.25rem}.brand small{font:12px var(--mono);color:var(--muted);letter-spacing:.04em}.nav{flex-wrap:wrap;gap:2px 4px;display:flex}.nav a{color:var(--text);border-radius:6px;padding:6px 10px;font-size:.95rem;text-decoration:none}.nav a:hover{background:var(--surface-2)}.nav a[aria-current=page]{background:var(--accent-soft);color:var(--accent);font-weight:600}main{padding:8px 0 56px}.crumbs{color:var(--muted);padding:14px 0 2px;font-size:.88rem}.crumbs ol{flex-wrap:wrap;gap:2px 8px;margin:0;padding:0;list-style:none;display:flex}.crumbs li+li:before{content:"›";color:var(--line);margin-right:8px}.crumbs a{color:var(--muted)}.page-head{padding:18px 0 8px}.page-head h1{letter-spacing:.01em;text-wrap:balance;margin:0 0 10px;font-size:clamp(1.6rem,4.6vw,2.15rem);line-height:1.35}.meta-line{font:13px var(--mono);color:var(--muted);flex-wrap:wrap;gap:4px 16px;margin:4px 0 0;display:flex}.prose{max-width:44rem}.prose>*+*{margin-top:1.05em}.prose h2{border-top:1px solid var(--line);text-wrap:balance;margin:2.2em 0 .5em;padding-top:.6em;font-size:1.45rem;line-height:1.4}.prose h3{margin:1.7em 0 .3em;font-size:1.15rem}.prose h2:first-child{border-top:0;margin-top:.4em}.prose ul,.prose ol{padding-left:1.4em}.prose li+li{margin-top:.35em}.prose strong{font-weight:650}.lead{color:var(--text);font-size:1.06rem}.wide{max-width:none}.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);max-width:44rem;padding:12px 18px;font-size:.95rem}.toc strong{margin-bottom:4px;display:block}.toc ol{margin:0;padding-left:1.3em}.toc li{margin:2px 0}.summary{background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;max-width:44rem;padding:14px 18px}.summary>:first-child{margin-top:0}.summary>:last-child{margin-bottom:0}.summary h2{letter-spacing:.04em;border:0;margin:0 0 6px;padding:0;font-size:1rem}.callout{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);max-width:44rem;padding:12px 16px;font-size:.96rem}.callout.note{background:var(--note-soft);color:var(--text);border-color:#0000}.callout.warn{background:var(--warn-soft);border-color:#0000}.callout>:first-child{margin-top:0}.callout>:last-child{margin-bottom:0}.callout b.label{font:12px var(--mono);letter-spacing:.06em;color:var(--warn);margin-right:6px;display:inline-block}.callout.note b.label{color:var(--note)}.cards{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:1.4em 0;display:grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}.card h3{margin:0 0 6px;font-size:1.08rem}.card p{color:var(--muted);margin:0 0 8px;font-size:.95rem;line-height:1.7}.card a.more{min-height:40px;padding:8px 0;font-weight:600;text-decoration:none;display:inline-block}.card a.more:after{content:" →"}.table-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);-webkit-overflow-scrolling:touch;margin:1.2em 0;overflow-x:auto}.table-wrap:focus-visible{outline-offset:0}table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:.92rem;line-height:1.55}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:9px 12px}th{background:var(--surface-2);white-space:nowrap;font-weight:650}tr:last-child td{border-bottom:0}td.num,th.num{text-align:right;white-space:nowrap}caption{text-align:left;color:var(--muted);caption-side:bottom;padding:10px 12px;font-size:.88rem}.nowrap{white-space:nowrap}.small{color:var(--muted);font-size:.88rem}.chip{border:1px solid var(--line);background:var(--surface-2);color:var(--muted);white-space:nowrap;border-radius:99px;padding:0 8px;font-size:.78rem;line-height:1.5;display:inline-block}.chip.lv-official-published{background:var(--accent-soft);color:var(--accent);border-color:#0000;font-weight:600}.chip.lv-official-claim{background:var(--warn-soft);color:var(--warn);border-color:#0000}.chip.lv-third-party{background:var(--note-soft);color:var(--note);border-color:#0000}.chip.lv-affiliated-site{background:0 0;border-style:dashed}.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin:8px 0;padding:0 16px}.faq summary{cursor:pointer;padding:12px 0;font-weight:600;list-style-position:outside}.faq details[open] summary{border-bottom:1px solid var(--line);margin-bottom:8px}.faq details>div{padding-bottom:12px}.faq p{margin:0 0 .7em}.disclosure{color:var(--muted);border-top:1px dashed var(--line);max-width:44rem;margin-top:2em;padding-top:12px;font-size:.9rem}.site-footer{background:var(--surface);border-top:1px solid var(--line);color:var(--muted);padding:26px 0 36px;font-size:.92rem}.site-footer .cols{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px 28px;display:grid}.site-footer h2{letter-spacing:.08em;color:var(--text);font-size:.8rem;font-family:var(--mono);margin:0 0 6px}.site-footer ul{margin:0;padding:0;list-style:none}.site-footer li{margin:2px 0}.site-footer a{color:var(--muted)}.site-footer .legal{border-top:1px solid var(--line);margin-top:20px;padding-top:14px;font-size:.85rem}@media (width<=640px){body{font-size:16.5px;line-height:1.85}.nav a{padding:6px 8px}th,td{padding:8px 10px}.prose h2{font-size:1.3rem}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@media print{.site-header,.site-footer,.skip{display:none}body{color:#000;background:#fff}}.calc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);max-width:44rem;margin:1em 0;padding:16px 18px}.calc-grid{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px 16px;display:grid}.calc label{color:var(--muted);gap:4px;font-size:.92rem;display:grid}.calc input{font:inherit;border:1px solid var(--line);background:var(--bg);color:var(--text);border-radius:6px;width:100%;min-height:44px;padding:8px 10px}.calc-out{background:var(--accent-soft);white-space:pre-line;border-radius:6px;margin-top:14px;padding:12px 14px;font-size:.97rem;line-height:1.8}a.entry{font-weight:600}.table-wrap a.entry{padding:4px 0;display:inline-block}.cta{flex-wrap:wrap;align-items:center;gap:8px 14px;display:flex}.cta a.entry{background:var(--accent);min-height:44px;color:var(--accent-ink);border-radius:6px;padding:10px 18px;line-height:1.6;text-decoration:none;display:inline-block}.cta a.entry:hover{filter:brightness(1.08)}.cta a.entry .small{color:inherit;opacity:.85}@media (width<=430px){.nav{gap:0}.nav a{padding:6px 5px;font-size:.9rem}.brand b{font-size:1.15rem}}