/* SellerFee — design system (approved mockups in sellerfee-design, 26 Oct 2026) */
:root{
 --ink-950:#070B16;--ink-900:#0B1220;--ink-800:#1A2233;--ink-700:#344054;--ink-600:#475467;--ink-500:#667085;--ink-400:#98A2B3;--ink-300:#D0D5DD;
 --line:#E7EAF0;--line-2:#F0F2F6;--surface:#F7F8FA;--surface-2:#FBFCFD;--white:#fff;
 --brand-700:#1A3FC4;--brand-600:#2450E6;--brand-500:#4B6FF0;--brand-300:#A9BCFA;--brand-100:#E3EAFF;--brand-50:#F1F5FF;
 --pos-700:#067A55;--pos-600:#0A9466;--pos-100:#DDF5EA;--pos-50:#EFFAF5;
 --warn-700:#9A5B07;--warn-100:#FDF0D5;--warn-50:#FFF8EA;--neg-600:#D1372B;--neg-50:#FEF2F1;
 --f1:#2450E6;--f2:#6E8CF3;--f3:#A9BCFA;--f4:#D6DEFC;--cost:#98A2B3;--profit:#0A9466;
 --r-sm:6px;--r:10px;--r-lg:14px;--r-xl:20px;
 --sh-1:0 1px 2px rgba(16,24,40,.05);--sh-2:0 1px 2px rgba(16,24,40,.04),0 4px 12px -2px rgba(16,24,40,.06);--sh-3:0 2px 4px rgba(16,24,40,.04),0 16px 40px -8px rgba(16,24,40,.12);
 --sans:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,'Noto Sans',sans-serif;
 --display:'Inter Tight','Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
 --mono:'Geist Mono','IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink-900);background:var(--white);font-size:15px;line-height:1.55}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%}
button,input,select{font:inherit;color:inherit}
[hidden]{display:none!important}
.wrap{max-width:1200px;margin:0 auto;padding:0 32px}
.narrow{max-width:820px}
svg.i{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:middle}
svg.rot{transform:rotate(-90deg)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--ink-900);color:#fff;padding:8px 12px;border-radius:0 0 8px 0}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.num,.tnum{font-variant-numeric:tabular-nums}
.mono{font-family:var(--mono);font-size:.92em}
.muted{color:var(--ink-500)}.muted2{color:var(--ink-400)}
.small{font-size:13px}.nowrap{white-space:nowrap}
.pos{color:var(--pos-700)}.neg{color:var(--neg-600)}.warn{color:var(--warn-700)}
.tile{display:inline-flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:700;letter-spacing:-.03em;flex:none;line-height:1}
.flag{font-family:'Noto Color Emoji','Apple Color Emoji','Segoe UI Emoji',sans-serif;line-height:1}

/* logo */
.logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--display);font-weight:650;font-size:19px;letter-spacing:-.02em;color:var(--ink-900)}
.logo .mark{width:28px;height:28px;flex:none}
.logo .tld{color:var(--ink-400);font-weight:500}

/* top bar + nav */
.topbar{background:var(--ink-900);color:#C9D1E3;font-size:13px}
.topbar .wrap{display:flex;align-items:center;justify-content:center;gap:10px;min-height:38px;padding-top:6px;padding-bottom:6px;text-align:center}
.topbar b{color:#fff;font-weight:550}
.topbar .pill{background:rgba(255,255,255,.1);color:#fff;border-radius:99px;padding:1px 8px;font-size:11.5px;font-weight:600;letter-spacing:.02em}
.topbar a{color:#fff;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(255,255,255,.35);white-space:nowrap}
.nav{border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);position:sticky;top:0;z-index:40;backdrop-filter:saturate(1.4) blur(8px)}
.nav .wrap{display:flex;align-items:center;height:68px;gap:36px}
.menu{display:flex;gap:28px;align-items:center;font-size:14.5px;color:var(--ink-700);font-weight:500}
.menu>a:hover,.menu summary:hover,.menu>a[aria-current]{color:var(--ink-900)}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:12px}
.dd{position:relative}
.dd summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:4px}
.dd summary::-webkit-details-marker{display:none}
.dd[open] summary svg.i:last-child{transform:rotate(180deg)}
.ddm{position:absolute;top:calc(100% + 12px);left:-12px;min-width:270px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-3);padding:8px;display:flex;flex-direction:column;z-index:50}
.ddm.right{left:auto;right:0;min-width:220px}
.ddm a{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--ink-800);font-weight:500}
.ddm a:hover{background:var(--surface)}
.ddm a[aria-current]{background:var(--brand-50);color:var(--brand-700)}
.ddm a.all{color:var(--brand-600);border-top:1px solid var(--line-2);margin-top:4px;border-radius:0 0 8px 8px}
.ddm .code{margin-left:auto}
.lm-note{font-size:12px;color:var(--ink-500);padding:6px 10px}
.dd.lang summary{height:36px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r);font-size:13.5px;color:var(--ink-700);font-weight:500;background:#fff;gap:7px}
.code{font-family:var(--mono);font-size:11px;background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:0 5px;color:var(--ink-600)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:var(--r);height:36px;width:40px;align-items:center;justify-content:center;cursor:pointer}

/* buttons, badges */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 16px;border-radius:var(--r);font-weight:550;font-size:14.5px;border:1px solid transparent;white-space:nowrap;letter-spacing:-.005em;cursor:pointer;background:none}
.btn-primary{background:var(--ink-900);color:#fff;box-shadow:0 1px 0 rgba(255,255,255,.12) inset,0 1px 2px rgba(16,24,40,.2)}
.btn-primary:hover{background:var(--ink-800)}
.btn-brand{background:var(--brand-600);color:#fff}
.btn-secondary{background:#fff;color:var(--ink-900);border-color:var(--ink-300);box-shadow:var(--sh-1)}
.btn-secondary:hover{background:var(--surface)}
.btn-link{color:var(--brand-600);padding:0;height:auto;font-size:13.5px}
.btn-lg{height:48px;padding:0 22px;font-size:15.5px;border-radius:12px}
.btn-sm{height:34px;padding:0 12px;font-size:13px;border-radius:8px}
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 9px;border-radius:99px;font-size:12.5px;font-weight:550;white-space:nowrap;border:1px solid transparent}
.badge.sm{height:22px;font-size:11.5px}
.badge .dot{width:6px;height:6px;border-radius:50%;background:currentColor}
.b-live{background:var(--pos-50);color:var(--pos-700);border-color:#C4EBD8}
.b-soon{background:var(--surface);color:var(--ink-600);border-color:var(--line)}
.b-new{background:var(--warn-50);color:var(--warn-700);border-color:#F6DDA8}
.b-brand{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand-100)}
.b-verified{background:#fff;color:var(--ink-700);border-color:var(--line)}
.b-verified svg{color:var(--pos-600)}

/* type */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2)}
.card-flat{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg)}
.eyebrow{font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-600)}
.h-display{font-family:var(--display);font-weight:650;letter-spacing:-.035em;line-height:1.06}
.h2{font-family:var(--display);font-weight:650;font-size:36px;letter-spacing:-.03em;line-height:1.12}
.h3{font-family:var(--display);font-weight:620;font-size:22px;letter-spacing:-.02em;line-height:1.25}
.lead{font-size:18px;color:var(--ink-600);line-height:1.6}

/* page head */
.phead{background:var(--surface);border-bottom:1px solid var(--line)}
.phead .wrap{padding-top:28px;padding-bottom:32px}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--ink-500)}
.crumbs a:hover{color:var(--ink-900)}
.crumbs b{color:var(--ink-800);font-weight:550}
.titlerow{display:flex;align-items:flex-start;gap:20px;margin-top:22px}
.titlerow h1{font-size:42px}
.metarow{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.langseg{margin-left:auto;display:flex;align-items:center;gap:10px;flex:none}
.langseg .seg a{flex:1;text-align:center;height:34px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:13.5px;font-weight:550;color:var(--ink-600);padding:0 12px;white-space:nowrap}
.langseg .seg a[aria-current]{background:#fff;color:var(--ink-900);box-shadow:0 1px 2px rgba(16,24,40,.08),0 0 0 1px var(--line)}

/* calculator */
.main{display:grid;grid-template-columns:minmax(0,1fr) 432px;gap:28px;padding-top:32px;align-items:start}
.main>*{min-width:0}
.cs{padding:24px 28px;border-top:1px solid var(--line)}
.cs:first-child{border-top:none}
.cs h3{font-size:13px;font-weight:600;color:var(--ink-900);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.cs h3 .n{width:22px;height:22px;border-radius:6px;background:var(--ink-900);color:#fff;font-size:11.5px;display:inline-flex;align-items:center;justify-content:center}
.cs h3 .opt{margin-left:auto;font-weight:450;color:var(--ink-400);font-size:12.5px}
.cs>.field.full{margin-bottom:16px}
.g2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.g4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.g4>.field,.g2>.field{min-width:0}
.cs>.hint{margin-top:10px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.label{font-size:13px;font-weight:550;color:var(--ink-700);display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.label .hint{color:var(--ink-400);font-weight:450}
.hint{font-size:12.5px;color:var(--ink-500);line-height:1.45}
.input{height:42px;border:1px solid var(--ink-300);border-radius:var(--r);background:#fff;display:flex;align-items:center;padding:0 12px;gap:8px;font-size:15px;box-shadow:var(--sh-1);position:relative;min-width:0}
.input:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(75,111,240,.16)}
.input .pre,.input .suf{color:var(--ink-500);font-size:14px;font-weight:500;white-space:nowrap}
.input input{flex:1;min-width:0;width:100%;border:0;outline:0;background:transparent;font-variant-numeric:tabular-nums;font-weight:500;height:100%}
.input input::-webkit-outer-spin-button,.input input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.input input[type=number]{-moz-appearance:textfield}
.input.select{padding:0}
.input.select select{appearance:none;-webkit-appearance:none;border:0;outline:0;background:transparent;width:100%;height:100%;padding:0 36px 0 12px;font-weight:500;font-size:14.5px;cursor:pointer;text-overflow:ellipsis;min-width:0}
.input.select .chev{position:absolute;right:12px;color:var(--ink-500);pointer-events:none}
.input.search{margin-bottom:10px}
.input.search svg{color:var(--ink-400)}
.catpick{margin-bottom:2px}
.seg{display:flex;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:3px;gap:2px}
.seg label{flex:1;position:relative;cursor:pointer;min-width:0}
.seg input{position:absolute;opacity:0;width:1px;height:1px}
.seg span{height:34px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:13.5px;font-weight:550;color:var(--ink-600);padding:0 6px;text-align:center;line-height:1.15}
.seg input:checked+span{background:#fff;color:var(--ink-900);box-shadow:0 1px 2px rgba(16,24,40,.08),0 0 0 1px var(--line)}
.seg input:focus-visible+span{outline:2px solid var(--brand-500)}
.tgs{display:grid;grid-template-columns:1fr 1fr;gap:18px 24px}
.toggle{display:flex;align-items:flex-start;gap:12px;cursor:pointer;position:relative}
.toggle input{position:absolute;opacity:0;width:1px;height:1px}
.sw{width:36px;height:20px;border-radius:99px;background:var(--ink-300);position:relative;flex:none;margin-top:1px;transition:background .15s}
.sw::after{content:'';position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:left .15s}
.toggle input:checked+.sw{background:var(--brand-600)}
.toggle input:checked+.sw::after{left:18px}
.toggle input:focus-visible+.sw{outline:2px solid var(--brand-500);outline-offset:2px}
.toggle input:disabled~*{opacity:.45}
.toggle b{font-size:14px;font-weight:550;display:block}
.toggle small{font-size:12.5px;color:var(--ink-500);line-height:1.45;display:block}
.adv summary{list-style:none;cursor:pointer;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:space-between}
.adv summary::-webkit-details-marker{display:none}
.adv[open] summary svg{transform:rotate(180deg)}
.adv .hint{margin:10px 0 14px}
.calc.loading{opacity:.7}
/* result */
.side{position:sticky;top:88px}
.res{overflow:hidden;box-shadow:var(--sh-3)}
.res .top{padding:24px 24px 20px;background:linear-gradient(180deg,#fff,#FBFCFD)}
.res .k{display:flex;justify-content:space-between;align-items:center;gap:8px}
.res .kl{font-size:13px;font-weight:600;color:var(--ink-700)}
.big{font-family:var(--display);font-weight:650;font-size:52px;letter-spacing:-.04em;line-height:1.05;font-variant-numeric:tabular-nums;margin-top:6px;overflow-wrap:anywhere}
.big.neg{color:var(--neg-600)}
.stack{display:flex;height:14px;border-radius:99px;overflow:hidden;gap:2px;background:var(--line-2);margin-top:18px}
.stack i,.stack span{display:block;height:100%;min-width:2px}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12.5px;color:var(--ink-600);list-style:none;margin-top:10px}
.legend li{display:inline-flex;align-items:center;gap:6px}
.legend i{width:8px;height:8px;border-radius:2px;display:inline-block}
.legend b{font-weight:550;color:var(--ink-500)}
.condnote{margin-top:12px;font-size:12.5px;background:var(--brand-50);border:1px solid var(--brand-100);color:#16245C;border-radius:8px;padding:8px 10px}
.kpis{display:grid;grid-template-columns:1fr 1fr 1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kpis div{padding:14px 16px;border-right:1px solid var(--line);min-width:0}
.kpis div:last-child{border:none}
.kpis span{font-size:12px;color:var(--ink-500);display:block}
.kpis b{font-size:18px;font-weight:650;font-variant-numeric:tabular-nums;letter-spacing:-.01em;display:block;overflow-wrap:anywhere}
.kpis small{font-size:11px;color:var(--ink-400);display:block;line-height:1.3}
.bd{padding:12px 24px}
table.bk{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
.bk td{padding:9px 0;vertical-align:top;color:var(--ink-700)}
.bk td.n{text-align:right;white-space:nowrap;padding-left:12px;color:var(--ink-900)}
.bk td small{display:block;color:var(--ink-400);font-size:12px;margin-top:1px;line-height:1.35}
.bk .dot{display:inline-block;width:9px;height:9px;border-radius:3px;margin-right:9px;vertical-align:1px}
.bk tr.tot td{border-top:1px solid var(--line);font-weight:600;color:var(--ink-900)}
.bk tr:last-child td{font-size:15px;font-weight:650}
.bk td.n.neg{color:var(--ink-900)}
.bk tr:last-child td.pos{color:var(--pos-700)}.bk tr:last-child td.neg{color:var(--neg-600)}
.res .foot{display:flex;gap:8px;padding:16px 24px;border-top:1px solid var(--line);background:var(--surface-2)}
.res .foot .btn{flex:1}
.tips{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}
.tip{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff}
.tip span{font-size:12.5px;color:var(--ink-500);display:flex;align-items:center;gap:6px}
.tip b{font-size:20px;font-weight:650;font-variant-numeric:tabular-nums;letter-spacing:-.015em;display:block;margin-top:2px}
.side .note{margin-top:14px;line-height:1.5}
/* old-vs-new */
section.blk{padding-top:72px}
.sh{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:24px}
.cmpcard{padding:24px 26px}
table.sf-cmp{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-size:15px}
.sf-cmp th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-500);font-weight:600;padding:10px 14px;text-align:left;background:var(--surface);border-bottom:1px solid var(--line)}
.sf-cmp th.n,.sf-cmp td.n{text-align:right}
.sf-cmp td{padding:12px 14px;border-bottom:1px solid var(--line-2)}
.sf-cmp tr.tot td{font-weight:650}
.sf-delta{margin-top:16px;background:var(--ink-900);color:#fff;border-radius:var(--r-lg);padding:16px 20px;font-size:15px}
.sf-delta b{font-family:var(--display);font-size:24px;letter-spacing:-.02em;margin-left:6px}
#sf-compare .muted{margin-top:12px;font-size:13.5px}

/* content layout */
.contentgrid{display:grid;grid-template-columns:200px minmax(0,1fr) 280px;gap:48px;align-items:start}
.contentgrid>*{min-width:0}
.toc{position:sticky;top:92px;font-size:13.5px}
.toc b{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-500);font-weight:600}
.toc .lst{margin-top:12px}
.toc a{display:block;padding:6px 0 6px 12px;border-left:2px solid var(--line);color:var(--ink-600);line-height:1.35}
.toc a:hover{color:var(--ink-900)}
.toc a.on{border-color:var(--ink-900);color:var(--ink-900);font-weight:550}
.rail{position:sticky;top:92px;display:flex;flex-direction:column;gap:16px}
.railcard{padding:18px}
.railcard .t{font-size:13.5px;font-weight:600}
.railcard p{font-size:13px;color:var(--ink-500);margin:4px 0 10px;line-height:1.5}
.railcard a.btn-link{display:inline-flex;align-items:center;gap:6px;font-weight:550}
.railcard ul{list-style:none;display:flex;flex-direction:column;gap:2px;margin-top:8px}
.railcard li a{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:13.5px;color:var(--ink-700)}
.railcard li a:hover{color:var(--brand-600)}
.prose{font-size:16.5px;line-height:1.72;color:var(--ink-700);max-width:720px}
.prose>*:first-child{margin-top:0}
.prose h1{font-family:var(--display);font-size:40px;letter-spacing:-.03em;line-height:1.1;color:var(--ink-900);margin-bottom:18px}
.prose h2{font-family:var(--display);font-size:28px;letter-spacing:-.025em;line-height:1.2;color:var(--ink-900);font-weight:650;margin:52px 0 14px;scroll-margin-top:90px}
.prose h3{font-size:18px;color:var(--ink-900);font-weight:620;margin:30px 0 8px;scroll-margin-top:90px}
.prose h4{font-size:15.5px;color:var(--ink-900);font-weight:620;margin:0 0 10px}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 18px 22px}
.prose li{margin-bottom:8px}
.prose b,.prose strong{color:var(--ink-900);font-weight:600}
.prose a{color:var(--brand-600);text-decoration:underline;text-decoration-color:var(--brand-300);text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--brand-600)}
.prose code{font-family:var(--mono);font-size:.88em;background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:1px 5px}
.prose details>summary{cursor:pointer;color:var(--brand-600);font-weight:550;margin-bottom:10px}
.prose .muted{font-size:14.5px}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);margin:8px 0 24px;-webkit-overflow-scrolling:touch}
.tablewrap.tall{max-height:520px;overflow-y:auto}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;font-variant-numeric:tabular-nums;line-height:1.45}
.prose th{text-align:left;font-size:12px;font-weight:600;color:var(--ink-500);text-transform:uppercase;letter-spacing:.05em;padding:10px 14px;background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0}
.prose td{padding:10px 14px;border-bottom:1px solid var(--line-2);vertical-align:top}
.prose tr:last-child td{border-bottom:none}
.prose td.n,.prose th.n{text-align:right;white-space:nowrap}
.example{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface-2);padding:20px 22px;margin:8px 0 26px}
.example .tablewrap{background:#fff;margin-bottom:12px}
.example p:last-child{margin-bottom:0}
.callout{border-radius:14px;padding:16px 20px;font-size:15.5px;line-height:1.6;margin:8px 0 24px;background:var(--brand-50);border:1px solid var(--brand-100);color:#16245C}
.callout.warn{background:var(--warn-50);border-color:#F6DDA8;color:#5C3604}
.callout b{color:inherit}
.formula{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:16px 20px;font-family:var(--mono);font-size:13.5px;line-height:1.8;color:var(--ink-800);margin:8px 0 22px}
.formula .fr{display:grid;grid-template-columns:200px 1fr;gap:12px;padding:3px 0}
.formula .fk{font-family:var(--sans);font-weight:600;font-size:13px;color:var(--ink-600)}
.formula em{font-style:normal;color:var(--brand-700)}
.kt{border:1px solid var(--line);border-radius:16px;padding:22px 24px;background:var(--surface-2);margin-bottom:8px}
.kt h4{font-size:13px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-500);font-weight:600;margin-bottom:10px}
.kt ul{list-style:none;margin:0}
.kt li{display:flex;gap:12px;font-size:16px;line-height:1.55;padding:6px 0;color:var(--ink-800);margin:0}
.kt li svg{color:var(--pos-600);margin-top:4px}
input.search{height:40px;border:1px solid var(--ink-300);border-radius:var(--r);padding:0 12px;width:100%;max-width:420px;font-size:14.5px;box-shadow:var(--sh-1)}
.faq{border-top:1px solid var(--line)}
.q{border-bottom:1px solid var(--line);padding:18px 4px}
.q summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-weight:600;font-size:16px;color:var(--ink-900);line-height:1.4}
.q summary::-webkit-details-marker{display:none}
.q[open] summary svg{transform:rotate(45deg)}
.q p{margin:10px 0 0;color:var(--ink-600);font-size:15px;line-height:1.65}
ol.srcs{list-style:none;margin:12px 0 0;display:flex;flex-direction:column;gap:10px}
.src{display:flex;gap:12px;align-items:flex-start;font-size:14px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;margin:0;line-height:1.5}
.src .ix{font-family:var(--mono);font-size:12px;color:var(--ink-400);margin-top:2px}
.src a{flex:1;color:var(--ink-800);text-decoration:none;overflow-wrap:anywhere}
.src a:hover{color:var(--brand-600)}
.src svg{color:var(--ink-400);margin-top:3px}
.report{display:flex;gap:10px;align-items:flex-start;margin-top:16px;font-size:13.5px;color:var(--ink-500)}
.report svg{margin-top:3px}
.report a{color:var(--brand-600);font-weight:550;text-decoration:none}
.ad-slot{margin:32px 0}

/* article header */
.ahead{border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--surface),#fff)}
.ahead .wrap{padding-top:36px;padding-bottom:44px}
.ahead h1{font-size:50px;margin-top:18px;max-width:980px}
.ahead .lead{margin-top:18px;max-width:780px;font-size:19px}
.byline{display:flex;align-items:center;flex-wrap:wrap;gap:14px 18px;margin-top:28px;font-size:13.5px;color:var(--ink-600)}
.byline>span{display:flex;align-items:center;gap:6px}
.byline .sep{width:1px;height:18px;background:var(--line)}
.byline .who b{color:var(--ink-900);font-weight:600;display:block}
.byline .act{margin-left:auto;gap:8px}
.alayout{padding-top:56px}
.relgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* cards & grids (hubs, home, guides index) */
section.s{padding:88px 0}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ccard{padding:22px;display:flex;flex-direction:column;gap:10px;transition:box-shadow .15s,border-color .15s}
a.ccard:hover{border-color:var(--ink-300);box-shadow:var(--sh-2)}
.ccard .top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.ccard h3{font-weight:620;font-size:16.5px;margin-top:4px;line-height:1.35}
.ccard p{font-size:13.5px;color:var(--ink-500);line-height:1.5}
.ccard .go{margin-top:auto;padding-top:8px;font-size:13.5px;font-weight:550;color:var(--brand-600);display:flex;align-items:center;gap:6px}
.ccard .go.soon{color:var(--ink-700)}
.gcard{overflow:hidden;display:flex;flex-direction:column}
a.gcard:hover{box-shadow:var(--sh-2);border-color:var(--ink-300)}
.gcard .cov{height:150px;border-bottom:1px solid var(--line);padding:22px;display:flex;flex-direction:column;justify-content:flex-end}
.gcard .cov .fig{font-family:var(--display);font-weight:650;font-size:40px;letter-spacing:-.03em;line-height:1.05}
.gcard .cov .cap{font-size:13px;font-weight:550;margin-top:4px}
.gcard .body{padding:22px;display:flex;flex-direction:column;flex:1}
.gcard h3{font-family:var(--display);font-weight:620;font-size:19px;letter-spacing:-.015em;line-height:1.3;margin:10px 0 8px;color:var(--ink-900)}
.gcard p{font-size:14px;color:var(--ink-600)}
.gmeta{display:flex;gap:14px;font-size:12.5px;color:var(--ink-500);margin-top:auto;padding-top:16px;flex-wrap:wrap}
.gmeta span{display:flex;align-items:center;gap:5px}
.cov-amber{background:linear-gradient(135deg,#FFF8EA,#FDF0D5);color:#5C3604}
.cov-blue{background:linear-gradient(135deg,#F1F5FF,#E3EAFF);color:#16245C}
.cov-green{background:linear-gradient(135deg,#EFFAF5,#DDF5EA);color:#05523A}
.cov-ink{background:linear-gradient(135deg,#F7F8FA,#E7EAF0);color:var(--ink-900)}
/* home */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(800px 420px at 85% 10%,rgba(75,111,240,.10),transparent 70%),radial-gradient(600px 380px at 70% 95%,rgba(10,148,102,.07),transparent 70%),#fff}
.hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(var(--line-2) 1px,transparent 1px),linear-gradient(90deg,var(--line-2) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 85%);mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 85%);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 480px;gap:64px;padding-top:80px;padding-bottom:92px;align-items:center}
.hero h1{font-size:60px;margin-top:28px;max-width:620px}
.hero .lead{margin-top:22px;max-width:560px}
.hero .ctas{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}
.announce{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);background:#fff;border-radius:99px;padding:4px 12px 4px 4px;font-size:13.5px;color:var(--ink-700);box-shadow:var(--sh-1)}
.announce .badge{height:22px}
.checks{display:flex;gap:10px 22px;margin-top:28px;font-size:13.5px;color:var(--ink-600);flex-wrap:wrap}
.checks span{display:flex;align-items:center;gap:7px}
.checks svg{color:var(--pos-600)}
.qc{overflow:hidden;box-shadow:var(--sh-3)}
.qc-tabs{display:flex;gap:4px;padding:10px 10px 0;border-bottom:1px solid var(--line);background:var(--surface-2);overflow-x:auto}
.qc-tabs a{white-space:nowrap;display:flex;align-items:center;gap:7px;padding:9px 11px 11px;font-size:13px;font-weight:550;color:var(--ink-500);border-bottom:2px solid transparent;margin-bottom:-1px}
.qc-tabs a.on{color:var(--ink-900);border-color:var(--ink-900)}
.qc-tabs a:hover{color:var(--ink-900)}
.qc .body{padding:22px 24px;display:flex;flex-direction:column;gap:16px}
.chips{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.chip{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:32px;padding:0 10px;border:1px solid var(--line);border-radius:8px;font-size:13px;font-weight:550;color:var(--ink-700);background:#fff}
.chip.on{border-color:var(--ink-900);box-shadow:0 0 0 1px var(--ink-900);color:var(--ink-900)}
.chip:hover{border-color:var(--ink-400)}
.qres{background:var(--surface);border-top:1px solid var(--line);padding:20px 24px}
.qres .row{display:flex;justify-content:space-between;align-items:flex-end;gap:12px}
.qres .v{font-size:40px;margin-top:2px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.stats div{padding:30px 32px;border-right:1px solid var(--line)}
.stats div:last-child{border:none}
.stats b{font-family:var(--display);font-size:32px;font-weight:650;letter-spacing:-.03em;display:block}
.stats span{font-size:13.5px;color:var(--ink-500)}
.pgrid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px;align-items:start}
.pcard{padding:24px}
.pcard .ph{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.pcard .ph b{font-weight:650;font-size:18px;display:block}
.mrow{display:flex;align-items:center;gap:12px;padding:11px 0;border-top:1px solid var(--line-2);font-size:14px}
a.mrow:hover .nm{color:var(--brand-600)}
.mrow .nm{font-weight:550;flex:1}
.mrow .r{color:var(--ink-500);font-size:13px}
.mrow.off .nm{color:var(--ink-500)}
.stackcol{display:grid;gap:20px}
.trust{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.tgrid{display:grid;grid-template-columns:380px minmax(0,1fr);gap:56px;align-items:start}
.step{display:flex;gap:16px;margin-top:28px}
.step .n{width:32px;height:32px;border-radius:9px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-weight:650;font-size:13px;flex:none;box-shadow:var(--sh-1)}
.step b{display:block;font-weight:600;margin-bottom:2px}
.step p{font-size:14px;color:var(--ink-600)}
.reg{overflow:hidden}
.reg .hd{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line)}
.tscroll{overflow-x:auto}
table.t{width:100%;border-collapse:collapse;font-size:14px}
.t th{text-align:left;font-size:12px;font-weight:600;color:var(--ink-500);text-transform:uppercase;letter-spacing:.05em;padding:10px 16px;background:var(--surface);border-bottom:1px solid var(--line);white-space:nowrap}
.t td{padding:12px 16px;border-bottom:1px solid var(--line-2);font-variant-numeric:tabular-nums;vertical-align:top}
.t tr:last-child td{border-bottom:none}
.t td a{color:var(--ink-800);font-weight:500;display:inline-flex;align-items:center;gap:6px}
.t td a:hover{color:var(--brand-600)}
.t .sub{display:block;font-size:12.5px;color:var(--ink-500)}
.cta{background:var(--ink-900);border-radius:24px;padding:52px 60px;color:#fff;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:center;position:relative;overflow:hidden;margin-top:88px}
.cta::after{content:'';position:absolute;right:-120px;top:-160px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(75,111,240,.35),transparent 65%)}
.cta>*{position:relative;z-index:1}
.cta h2{font-size:34px}
.cta p{color:#AAB3C5;margin-top:10px;font-size:16px;max-width:560px}
.cta .btns{display:flex;gap:10px;flex-wrap:wrap}
.cta .btn-secondary{background:#121A2C;border-color:#2A3348;color:#fff;box-shadow:none}
/* static pages */
.spage{padding:48px 0 96px}
/* footer */
.footer{background:var(--ink-950);color:#98A2B3;padding:72px 0 36px;font-size:14px;margin-top:96px}
.footer .logo{color:#fff}
.footer .grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px}
.footer h2{color:#fff;font-size:13px;font-weight:600;margin-bottom:14px;letter-spacing:.01em}
.footer ul{list-style:none}
.footer li{margin-bottom:10px;line-height:1.4}
.footer a:hover{color:#fff}
.footer .ftag{margin-top:16px;max-width:300px;line-height:1.6}
.footer .legal{border-top:1px solid #1E2638;margin-top:56px;padding-top:24px;display:flex;justify-content:space-between;gap:40px;font-size:12.5px;color:#7A8499;line-height:1.6}
.footer .langs{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.footer .langs a{border:1px solid #273046;border-radius:99px;padding:3px 10px;font-size:12.5px;color:#B6BFD0}
.footer .langs a.on{background:#fff;color:var(--ink-900);border-color:#fff}

@media (max-width:1100px){
 .main{grid-template-columns:minmax(0,1fr) 380px}
 .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
 .contentgrid{grid-template-columns:180px minmax(0,1fr)}
 .rail{display:none}
 .hero .wrap{grid-template-columns:1fr;gap:48px}
 .pgrid{grid-template-columns:1fr 1fr}
 .tgrid{grid-template-columns:1fr}
 .footer .grid{grid-template-columns:repeat(3,1fr)}.footer .grid>div:first-child{grid-column:1/-1}
}
@media (max-width:900px){
 .main{grid-template-columns:1fr}
 .side{position:static}
 .menu{display:none}
 .menu.open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 16px 16px;box-shadow:var(--sh-3)}
 .menu.open>a,.menu.open summary{padding:12px 4px;border-bottom:1px solid var(--line-2)}
 .menu.open .ddm{position:static;box-shadow:none;border:0;padding:4px 0 8px;min-width:0}
 .menu-btn{display:inline-flex}
 .hide-m{display:none!important}
 .cards,.relgrid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
 body{font-size:15px}
 .wrap{padding:0 16px}
 .topbar{font-size:12px}.topbar .pill{display:none}
 .nav .wrap{height:56px;gap:12px}
 .logo{font-size:17px}
 .dd.lang summary{height:34px;padding:0 9px}.dd.lang .ln,.dd.lang summary .code{display:none}
 .phead .wrap{padding-top:16px;padding-bottom:22px}
 .titlerow{gap:12px;margin-top:14px}.titlerow h1{font-size:28px;line-height:1.12}
 .titlerow>.tile{display:none}
 .langseg{display:none}
 .lead{font-size:15.5px}
 .metarow .hide-s{display:none}
 .main{gap:16px;padding-top:16px}
 .cs{padding:20px 18px}
 .g4{gap:12px}.g2{grid-template-columns:1fr;gap:12px}.tgs{grid-template-columns:1fr;gap:16px}
 .res .foot{flex-direction:column}
 .big{font-size:44px}
 .res .top{padding:20px 18px 16px}.bd{padding:10px 18px}.res .foot{padding:14px 18px}
 .kpis div{padding:12px 12px}.kpis b{font-size:16px}
 .tips{gap:10px}.tip b{font-size:18px}
 section.blk{padding-top:48px}
 .h2{font-size:26px}
 .sh{flex-direction:column;align-items:flex-start;gap:10px}
 .contentgrid{grid-template-columns:1fr;gap:24px}
 .toc{display:none}
 .prose{font-size:16px}.prose h2{font-size:24px;margin-top:40px}.prose h1{font-size:30px}
 .formula .fr{grid-template-columns:1fr;gap:0;padding:5px 0}.formula{font-size:12.5px;line-height:1.6}
 .prose th,.prose td{padding:9px 10px;font-size:13.5px}
 .example{padding:16px}
 .ahead h1{font-size:32px}.ahead .lead{font-size:16.5px}.byline .act{margin-left:0}
 .hero .wrap{padding-top:44px;padding-bottom:56px}
 .hero h1{font-size:38px;margin-top:20px}
 .stats{grid-template-columns:1fr 1fr}.stats div{padding:20px 16px;border-bottom:1px solid var(--line)}.stats div:nth-child(2n){border-right:none}.stats b{font-size:26px}
 section.s{padding:56px 0}
 .pgrid,.cards,.relgrid{grid-template-columns:1fr}
 .qc .body{padding:18px}.qres{padding:18px}.qres .v{font-size:32px}.qres .row{flex-direction:column;align-items:flex-start}
 .cta{padding:32px 22px;grid-template-columns:1fr;gap:22px;margin-top:56px;border-radius:18px}.cta h2{font-size:26px}
 .footer{padding:48px 0 28px;margin-top:64px}.footer .grid{grid-template-columns:1fr 1fr;gap:28px}
 .footer .legal{flex-direction:column;gap:12px;margin-top:36px}
 .t th,.t td{padding:10px 12px;font-size:13px}
}