:root{
  --bg:#E4E8F3;--bg-top:#EDF0F8;--bg-bottom:#DCE2EE;
  --panel:#F7F9FD;--panel-hi:#FFFFFF;--panel-side:#EEF1F8;--panel-side-2:#E8ECF5;
  --groove:#D6DCEB;--stage-warm:#EAE9EA;--border:#C6CEDF;--border-soft:#DDE2ED;
  --line-soft:rgba(31,46,92,.08);--accent:#E39A1A;--accent-dark:#9C5F06;--accent-2:#F4C563;
  --accent-ring:rgba(227,154,26,.22);--accent-08:rgba(227,154,26,.08);--accent-2-14:rgba(244,197,99,.14);
  --text:#10141F;--text-2:#30384B;--muted:#586176;--muted-2:#868FA4;
  --success:#1E8A57;--warn:#B9640B;--error:#C43A30;
  --ink-hover:#1E2536;--ink-knob:#283044;--on-ink:#FFFFFF;
  --on-ink-line:rgba(255,255,255,.18);--on-ink-hl:rgba(255,255,255,.10);
  --hl-white:rgba(255,255,255,.92);--glass:rgba(247,249,253,.62);
  --grid-line:rgba(31,46,92,.04);--mask-solid:rgba(0,0,0,1);--mask-clear:rgba(0,0,0,0);
  --shadow-06:rgba(31,46,92,.06);--shadow-08:rgba(31,46,92,.08);
  --shadow-12:rgba(31,46,92,.12);--shadow-16:rgba(31,46,92,.16);
  --light-dot:#CDD3E1;--veil:rgba(16,20,31,.28);
  --flag-red:#D33A43;--flag-white:#FFFFFF;--flag-blue:#2D3D74;--flag-black:#17191E;--flag-gold:#F0C232;--flag-edge:rgba(16,20,31,.16);
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --fs-tiny:10px;--fs-code:10.5px;--fs-micro:11px;--fs-caption:11.5px;
  --fs-xs:12px;--fs-small:12.5px;--fs-ui:13px;--fs-label:13.5px;
  --fs-nav:14px;--fs-notice:14.5px;--fs-body:15px;--fs-reading:17px;
  --fs-brand:18px;--fs-line:19px;--fs-lede:20px;--fs-h3:22px;
  --fs-h2:32px;--fs-statement:38px;--fs-display:68px;--fs-display-mobile:38px;
  --weight-body:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--weight-display:800;
  --r-xs:4px;--r-sm:6px;--r-md:8px;--r-lg:10px;--r-xl:22px;--r-pill:999px;--r-round:50%;
  --shadow-window:0 1px 2px var(--shadow-08),0 24px 48px -24px var(--shadow-12),0 56px 120px -36px var(--shadow-12);
  --shadow-float:0 1px 2px var(--shadow-08),0 18px 40px -16px var(--shadow-16);
  --shadow-pop:0 1px 2px var(--shadow-08),0 22px 48px -18px var(--shadow-16);
  --wrap:1200px;--gutter:32px;--header-height:60px;--toc-height:64px;
  --anchor-offset:calc(var(--header-height) + var(--toc-height) + 16px);
  --ease-out:cubic-bezier(.2,.7,.2,1);--time-fast:.15s;--time-reveal:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-height) + 16px);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--fs-body);font-weight:var(--weight-body);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
button{border:0}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--text);outline-offset:3px;border-radius:var(--r-sm)}
ul,ol,dl,dd,p{margin:0;padding:0}
ul,ol{list-style:none}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance}
h1{font-size:clamp(52px,5vw,var(--fs-display));font-weight:var(--weight-display);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--fs-h2);line-height:1.25;letter-spacing:-.02em;font-weight:var(--weight-bold);margin:0 0 24px}
h3{font-size:var(--fs-h3);line-height:1.35;font-weight:var(--weight-bold);margin:0 0 16px}
b,strong{font-weight:var(--weight-semibold)}
img,video{max-width:100%;height:auto}
svg{flex-shrink:0}
[hidden]{display:none!important}
code{font-family:var(--font-mono);overflow-wrap:anywhere;word-break:break-word}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--groove);border:1px solid var(--border);border-radius:var(--r-md);font-family:var(--font-mono)}
pre code{overflow-wrap:normal;word-break:normal;white-space:pre}
section,article,main,nav,aside,div{min-width:0}
.wrap{width:100%;max-width:calc(var(--wrap) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:72px}
.section-head{margin-bottom:32px}
.section-head p{max-width:720px;color:var(--muted);font-size:var(--fs-reading)}
.no-break{white-space:nowrap}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}
.ink{color:var(--text)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ico{fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;flex:none}
.panel,.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:inset 0 1px 0 var(--hl-white),0 12px 32px -24px var(--shadow-12)}
.panel{padding:28px}
.card{padding:24px}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.reading{max-width:840px}
.prose{font-size:var(--fs-reading);line-height:1.85;overflow-wrap:anywhere}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote{margin-block:0 24px}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose a{text-decoration:underline;text-underline-offset:4px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{list-style:decimal;padding-left:24px}
.prose li+li{margin-top:8px}
.prose code{font-size:var(--fs-body);background:var(--panel-side);border-radius:var(--r-xs);padding:2px 5px}
.prose pre code{padding:0;background:var(--clear)}
.decor-zone{position:relative;overflow-x:clip}
.decor-zone [aria-hidden="true"]{max-width:100%}
#server-status{position:static;display:block;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
.reveal{transition:opacity var(--time-reveal) var(--ease-out),transform var(--time-reveal) var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.fold{position:relative;overflow-x:clip;max-width:100%;background:linear-gradient(180deg,var(--bg-top) 0%,var(--bg) 55%,var(--bg-bottom) 100%)}
.fold::before{content:"";position:absolute;inset:0;background-image:linear-gradient(to right,var(--grid-line) 1px,var(--clear) 1px),linear-gradient(to bottom,var(--grid-line) 1px,var(--clear) 1px);background-size:32px 32px;background-position:-1px -1px;-webkit-mask-image:linear-gradient(180deg,var(--mask-solid) 0%,var(--mask-solid) 62%,var(--mask-clear) 100%);mask-image:linear-gradient(180deg,var(--mask-solid) 0%,var(--mask-solid) 62%,var(--mask-clear) 100%);pointer-events:none}
#site-header{position:relative;z-index:50;min-height:var(--header-height)}
.topbar{position:relative;z-index:53;height:var(--header-height);border-bottom:1px solid var(--line-soft);background:var(--glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.topbar__in{height:100%;display:flex;align-items:center;gap:24px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;min-height:32px}
.brand__mark{display:block;flex:none;width:25px;height:25px}
.brand__en{font-family:var(--font-display);font-weight:var(--weight-display);font-size:var(--fs-brand);letter-spacing:-.02em;color:var(--text);white-space:nowrap}
.brand__zh{font-size:var(--fs-ui);font-weight:var(--weight-medium);color:var(--muted);padding-left:10px;border-left:1px solid var(--border)}
.mainnav{flex:1;min-width:0;margin-left:auto}
.mainnav ul{display:flex;align-items:center;justify-content:flex-end;list-style:none;margin:0;padding:0;gap:28px}
.mainnav a{display:inline-flex;align-items:center;min-height:32px;white-space:nowrap;font-size:var(--fs-nav);color:var(--muted);font-weight:var(--weight-medium);transition:color var(--time-fast)}
.mainnav a:hover{color:var(--text)}
.mainnav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-semibold)}
.topbar__tools{display:flex;align-items:center;gap:18px;flex:none}
.topbar__rule{width:1px;height:18px;background:var(--border)}
.language{position:relative}
.lang{border:0;background:var(--clear);padding:0;min-height:32px;width:auto;white-space:nowrap;font-size:var(--fs-label);color:var(--muted);display:inline-flex;align-items:center;justify-content:center;gap:6px}
.lang__caret{font-size:var(--fs-tiny)}
.language-panel{position:absolute;z-index:60;top:calc(100% + 12px);right:0;width:max-content;min-width:160px;padding:6px;background:var(--panel-hi);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-pop)}
.language-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-xs);font-size:var(--fs-nav);white-space:nowrap}
.language-panel a:hover,.language-panel a[aria-current="true"]{background:var(--groove)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:32px;padding:0 16px;border-radius:var(--r-pill);background:var(--text);color:var(--on-ink);font-size:var(--fs-label);font-weight:var(--weight-semibold);white-space:nowrap;box-shadow:inset 0 1px 0 var(--on-ink-hl),0 6px 14px -8px var(--shadow-16);transition:background var(--time-fast)}
.btn-login:hover{background:var(--ink-hover)}
.menu-toggle{display:none;min-width:44px;min-height:44px;padding:10px;background:var(--clear);color:var(--text);align-items:center;justify-content:center;flex-direction:column;gap:4px;border-radius:var(--r-sm)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{display:none;position:fixed;z-index:52;top:var(--header-height);left:0;right:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;padding:20px var(--gutter) 40px;background:var(--panel);border-top:1px solid var(--border)}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px;border-bottom:1px solid var(--border-soft);font-size:var(--fs-body)}
.mobile-drawer a[aria-current]{font-weight:var(--weight-semibold)}
.drawer-label{display:block;padding:24px 12px 8px;color:var(--muted);font-size:var(--fs-xs)}
.menu-veil{position:fixed;z-index:51;inset:var(--header-height) 0 0;background:var(--veil);border:0}
html.nav-open{overflow:hidden}
.hero{position:relative;z-index:1;padding-top:32px}
.hero__copy{position:relative;z-index:2}
.kicker{display:inline-flex;align-items:center;gap:10px;min-height:26px;padding:0 12px 0 3px;border-radius:var(--r-pill);border:1px solid var(--border);background:var(--glass);font-size:var(--fs-small);color:var(--muted);box-shadow:inset 0 1px 0 var(--hl-white)}
.kicker__code{font-family:var(--font-mono);font-size:var(--fs-code);font-weight:var(--weight-semibold);letter-spacing:.06em;height:20px;display:inline-flex;align-items:center;padding:0 8px;border-radius:var(--r-pill);background:var(--text);color:var(--on-ink)}
.display{margin:18px 0 0;font-family:var(--font-display);font-weight:var(--weight-display);font-size:var(--fs-display);line-height:1.04;letter-spacing:-.03em;color:var(--text)}
.display__line{display:block}
.lede-row{margin-top:18px;display:flex;align-items:baseline;justify-content:space-between;gap:32px}
.lede{font-size:var(--fs-lede);line-height:1.5;color:var(--muted)}
.lede strong{color:var(--text)}
.notice{display:inline-flex;align-items:baseline;gap:8px;min-height:24px;font-size:var(--fs-notice);color:var(--muted);flex:none;transition:color var(--time-fast)}
.notice__new{color:var(--text);font-weight:var(--weight-semibold)}
.notice:hover{color:var(--text)}
.notice__arrow{transition:transform var(--time-fast)}
.notice:hover .notice__arrow{transform:translateX(2px)}
.action-row{margin-top:24px;display:flex;align-items:center;gap:28px}
.ctas{display:flex;align-items:center;gap:12px;flex:none}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:14px;min-height:46px;padding:0 6px 0 22px;border-radius:var(--r-pill);background:var(--text);color:var(--on-ink);font-size:var(--fs-body);font-weight:var(--weight-semibold);white-space:nowrap;flex-shrink:0;box-shadow:inset 0 1px 0 var(--on-ink-hl),0 10px 24px -10px var(--shadow-16);transition:background var(--time-fast)}
.btn-primary:hover{background:var(--ink-hover)}
.btn-primary:active{background:var(--ink-knob)}
.btn-primary[aria-disabled="true"],.btn-primary:disabled{background:var(--groove);color:var(--muted);box-shadow:none;cursor:not-allowed}
.btn-primary__knob{width:34px;height:34px;border-radius:var(--r-round);display:inline-flex;align-items:center;justify-content:center;background:var(--ink-knob);border:1px solid var(--on-ink-line);color:var(--on-ink)}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:var(--r-pill);border:1px solid var(--border);background:var(--glass);color:var(--text);font-size:var(--fs-body);font-weight:var(--weight-semibold);white-space:nowrap;flex-shrink:0;box-shadow:inset 0 1px 0 var(--hl-white);transition:background var(--time-fast)}
.btn-ghost:hover{background:var(--panel)}
.btn-ghost:active{background:var(--groove)}
.action-row__rule{width:1px;height:22px;background:var(--border);flex:none}
.trust{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px}
.trust li{display:inline-flex;align-items:center;gap:7px;font-size:var(--fs-label);color:var(--muted)}
.trust .ico{color:var(--text-2)}
.marks{margin-top:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.marks li{display:inline-flex;align-items:center;gap:8px;font-size:var(--fs-nav);font-weight:var(--weight-medium);color:var(--text-2);white-space:nowrap}
.marks svg{display:block;flex:none}
.marks__rule{width:1px;height:20px;background:var(--border)}
.flag{position:relative;display:inline-block;flex:none;width:21px;height:14px;border-radius:var(--r-xs);overflow:hidden}
.flag::after{content:"";position:absolute;inset:0;border-radius:inherit;box-shadow:inset 0 0 0 1px var(--flag-edge)}
.flag svg{display:block;width:100%;height:100%}
.flag--lg{width:24px;height:16px}
.fx-r{fill:var(--flag-red)}.fx-w{fill:var(--flag-white)}.fx-b{fill:var(--flag-blue)}.fx-k{fill:var(--flag-black)}.fx-g{fill:var(--flag-gold)}
.stage{position:relative;margin:22px 16px 0;padding:36px 0 28px;border-radius:var(--r-xl);background:radial-gradient(ellipse 58% 70% at 50% 100%,var(--accent-2-14),var(--clear) 72%),linear-gradient(180deg,var(--groove) 0%,var(--stage-warm) 100%);box-shadow:inset 0 1px 0 var(--hl-white),inset 0 0 0 1px var(--line-soft)}
.device{position:relative;width:min(var(--wrap),calc(100% - 64px));margin-inline:auto}
.device::before{content:"";position:absolute;left:14%;right:14%;bottom:-24px;height:44px;background:radial-gradient(ellipse at center,var(--accent-08),var(--clear) 70%);filter:blur(10px);z-index:0;pointer-events:none}
.win{position:relative;z-index:1;height:366px;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-window)}
.win::before{content:"";position:absolute;inset:0;border-radius:inherit;box-shadow:inset 0 0 0 1px var(--hl-white);pointer-events:none;z-index:6}
.win__bar{position:relative;height:32px;flex:none;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,var(--panel-hi),var(--panel-side));border-bottom:1px solid var(--border-soft)}
.win__lights{position:absolute;left:14px;top:50%;transform:translateY(-50%);display:flex;gap:7px}
.win__lights i{width:10px;height:10px;border-radius:var(--r-round);background:var(--light-dot);box-shadow:inset 0 0 0 1px var(--shadow-08)}
.win__title{font-family:var(--font-mono);font-size:var(--fs-caption);color:var(--muted)}
.win__badge{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-family:var(--font-mono);font-size:var(--fs-code);color:var(--muted);padding:1px 7px;border:1px solid var(--border-soft);border-radius:var(--r-xs);background:var(--panel)}
.win__body{flex:1;min-height:0;display:grid;grid-template-columns:232px 1fr 368px}
.pane-side{background:linear-gradient(180deg,var(--panel-side),var(--panel-side-2));border-right:1px solid var(--border-soft);padding:12px 10px}
.side-brand{display:flex;align-items:center;gap:8px;height:32px;padding:0 6px 0 8px}
.side-brand b{font-size:var(--fs-label);font-weight:var(--weight-display);letter-spacing:-.01em}
.side-brand__caret{font-size:var(--fs-tiny);color:var(--muted)}
.side-brand__search{margin-left:auto;width:24px;height:24px;border-radius:var(--r-round);display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border-soft);background:var(--panel);color:var(--muted)}
.side-nav{margin-top:8px}
.side-nav li,.side-lines li{position:relative;display:flex;align-items:center;gap:10px;height:26px;padding:0 8px;border-radius:var(--r-sm);font-size:var(--fs-ui);color:var(--text-2)}
.side-nav .ico{color:var(--muted)}
.side-nav li.is-on{color:var(--text);font-weight:var(--weight-semibold)}
.side-nav li.is-on .ico{color:var(--text)}
.side-group{margin:12px 0 4px;padding:0 8px;font-size:var(--fs-xs);font-weight:var(--weight-semibold);color:var(--muted);line-height:20px}
.side-group span{font-size:var(--fs-tiny);margin-left:4px}
.side-lines .flag{width:18px;height:12px;border-radius:var(--r-xs)}
.side-lines li.is-current{background:var(--groove);color:var(--text);font-weight:var(--weight-semibold);box-shadow:inset 0 1px 2px var(--shadow-08),0 1px 0 var(--hl-white)}
.side-lines li.is-current::before{content:"";position:absolute;left:0;top:7px;width:3px;height:12px;border-radius:var(--r-xs);background:var(--accent)}
.side-tag{margin-left:auto;font-family:var(--font-mono);font-size:var(--fs-tiny);font-weight:var(--weight-medium);color:var(--muted);padding:0 5px;border:1px solid var(--border);border-radius:var(--r-xs);line-height:16px;background:var(--panel)}
.pane-main{background:var(--panel);min-width:0}
.pane-head{height:40px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 20px;border-bottom:1px solid var(--border-soft);font-size:var(--fs-small);color:var(--muted)}
.crumbs{display:flex;align-items:center;gap:8px}
.crumbs__sep{color:var(--border)}
.crumbs__now{color:var(--text-2);font-weight:var(--weight-semibold)}
.pane-head__tools{display:flex;align-items:center;gap:12px;color:var(--muted)}
.pane-main__body{padding:16px 28px 0}
.line-title{display:flex;align-items:center;gap:10px;font-size:var(--fs-line);line-height:26px;font-weight:var(--weight-bold);letter-spacing:-.01em;color:var(--text)}
.line-desc{margin-top:6px;font-size:var(--fs-label);line-height:1.6;color:var(--muted);max-width:520px}
.line-desc b{color:var(--text-2)}
.code-chip{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--text);padding:1px 6px;border-radius:var(--r-xs);background:var(--panel-side);border:1px solid var(--border-soft)}
.act-h{margin-top:16px;font-size:var(--fs-label);line-height:20px;font-weight:var(--weight-semibold);color:var(--text)}
.act{margin-top:10px}
.act li{position:relative;display:flex;align-items:center;gap:10px;min-height:28px;font-size:var(--fs-small);color:var(--muted)}
.act li b{color:var(--text-2)}
.act li:not(:last-child)::after{content:"";position:absolute;left:9px;top:23px;width:1px;height:10px;background:var(--border)}
.act__ico{width:19px;height:19px;border-radius:var(--r-round);flex:none;display:inline-flex;align-items:center;justify-content:center;background:var(--panel-side);border:1px solid var(--border-soft);color:var(--text-2)}
.act-card{margin-top:8px;max-width:480px;padding:10px 12px;background:var(--panel-hi);border:1px solid var(--border-soft);border-radius:var(--r-sm);box-shadow:0 1px 2px var(--shadow-06),inset 0 1px 0 var(--hl-white)}
.act-card__top{display:flex;align-items:center;gap:8px;font-size:var(--fs-small);color:var(--muted)}
.act-card__top b{color:var(--text-2)}
.act-card__txt{margin-top:4px;padding-left:27px;font-size:var(--fs-small);color:var(--text)}
.act-card__txt .mono{font-size:var(--fs-xs)}
.act-card__sub{color:var(--muted)}
.pane-info{position:relative;background:var(--panel);border-left:1px solid var(--border-soft)}
.pane-head__label{color:var(--text-2);font-weight:var(--weight-semibold)}
.pane-head__code{font-family:var(--font-mono);font-size:var(--fs-micro);color:var(--muted);margin-left:8px;font-weight:var(--weight-body)}
.info{padding:12px 20px}
.info__row{display:grid;grid-template-columns:72px 1fr;align-items:center;min-height:26px}
.info dt{font-size:var(--fs-small);color:var(--muted)}
.info dd{display:flex;align-items:center;gap:8px;font-size:var(--fs-ui);color:var(--text)}
.dot-live{width:8px;height:8px;border-radius:var(--r-round);background:var(--accent);box-shadow:0 0 0 3px var(--accent-ring);flex:none}
.info__live{font-weight:var(--weight-semibold)}
.session{position:absolute;right:14px;bottom:14px;width:396px;z-index:2;background:var(--panel-hi);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-pop),inset 0 1px 0 var(--hl-white)}
.session__bar{height:32px;display:flex;align-items:center;gap:8px;padding:0 12px;border-bottom:1px solid var(--border-soft);font-size:var(--fs-small)}
.session__bar b{font-weight:var(--weight-bold)}
.session__tag{font-family:var(--font-mono);font-size:var(--fs-tiny);color:var(--muted);padding:0 5px;line-height:16px;border:1px solid var(--border-soft);border-radius:var(--r-xs)}
.session__ctl{margin-left:auto;display:flex;align-items:center;gap:12px;color:var(--muted)}
.session__body{padding:12px}
.session__meta{font-family:var(--font-mono);font-size:var(--fs-micro);line-height:16px;color:var(--muted)}
.session__msg{margin-top:4px;font-size:var(--fs-nav);line-height:20px;color:var(--text-2)}
.session__msg b{color:var(--text)}
.session__input{margin-top:10px;height:40px;display:flex;align-items:center;justify-content:space-between;padding:0 6px 0 12px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--panel);box-shadow:inset 0 1px 2px var(--shadow-06)}
.session__ph{font-size:var(--fs-ui);color:var(--muted-2)}
.session__send{width:28px;height:28px;border-radius:var(--r-round);flex:none;display:inline-flex;align-items:center;justify-content:center;background:var(--text);color:var(--on-ink)}
.chip-card{position:absolute;z-index:3;display:flex;align-items:center;gap:10px;padding:7px 14px 7px 7px;border-radius:var(--r-lg);background:var(--panel-hi);border:1px solid var(--border);box-shadow:var(--shadow-float),inset 0 1px 0 var(--hl-white);white-space:nowrap}
.chip-card__ico{width:26px;height:26px;border-radius:var(--r-round);flex:none;display:inline-flex;align-items:center;justify-content:center}
.chip-card--lock{top:-32px;left:-40px;transform:rotate(-3deg)}
.chip-card--lock .chip-card__ico{background:var(--text);color:var(--on-ink)}
.chip-card--lock .chip-card__txt{font-size:var(--fs-ui);color:var(--muted)}
.chip-card--lock .chip-card__txt b{color:var(--text)}
.chip-card--pack{right:-36px;bottom:-20px;font-family:var(--font-mono)}
.chip-card--pack .chip-card__ico{background:var(--groove);color:var(--text)}
.pack{display:flex;flex-direction:column;line-height:1.25}
.pack__k{font-size:var(--fs-code);color:var(--muted)}
.pack__v{font-size:var(--fs-small);font-weight:var(--weight-semibold);color:var(--text)}
.pack__price{font-size:var(--fs-caption);color:var(--muted);padding-left:10px;border-left:1px solid var(--border-soft)}
.statement{padding-top:72px;padding-bottom:96px}
.statement p{font-family:var(--font-display);font-size:var(--fs-statement);line-height:1.28;font-weight:var(--weight-bold);letter-spacing:-.02em;color:var(--muted);max-width:1100px}
.statement .ink{color:var(--text)}
.site-footer{padding-top:56px;padding-bottom:24px;border-top:1px solid var(--border);background:var(--panel-side)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr .8fr;gap:40px}
.footer-brand p{margin-top:18px;max-width:320px;color:var(--muted);font-size:var(--fs-nav);line-height:1.8}
.footer-heading{display:block;margin-bottom:16px;font-size:var(--fs-ui);font-weight:var(--weight-semibold);color:var(--text)}
.footer-links{display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--fs-ui);color:var(--muted)}
.footer-links a:hover{color:var(--text);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;font-size:var(--fs-xs);color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:28px}
@media(max-width:1180px){
  .mainnav ul{gap:18px}.topbar__in{gap:20px}.topbar__tools{gap:14px}
  .win__body{grid-template-columns:200px 1fr 330px}.session{width:350px}
  .marks{flex-wrap:wrap;justify-content:flex-start;gap:12px 24px}
  .action-row{flex-wrap:wrap;gap:16px 24px}.action-row__rule{display:none}
}
@media(max-width:1040px){
  .mainnav{display:none}.topbar__tools{margin-left:auto}.topbar__rule{display:none}
  .menu-toggle{display:inline-flex}.mobile-drawer:not([hidden]){display:block}
}
@media(min-width:1041px){.mobile-drawer,.menu-veil{display:none!important}}
@media(max-width:768px){
  :root{--gutter:20px}
  h1{font-size:var(--fs-display-mobile)}
  h2{font-size:var(--fs-h3)}
  .grid-three{grid-template-columns:1fr}
  .brand__zh{display:none}.hero{padding-top:28px}.display{font-size:var(--fs-display-mobile);line-height:1.1;letter-spacing:-.02em}
  .lede-row{flex-direction:column;gap:10px}.lede{font-size:var(--fs-reading)}
  .marks__rule{display:none}
  .stage{margin:24px 8px 0;padding:20px 0}
  .device{width:calc(100% - 40px);display:flex;flex-wrap:wrap;gap:12px}
  .device::before{display:none}.win{order:-1;width:100%;height:auto}
  .win__title{display:none}.win__body{grid-template-columns:1fr}.pane-side{display:none}
  .pane-main__body{padding:16px 18px}.act-card{max-width:none}
  .pane-info{border-left:0;border-top:1px solid var(--border-soft)}
  .session{position:static;width:auto;margin:0 14px 14px}.chip-card{position:static;transform:none;max-width:100%;white-space:normal}
  .statement p{font-size:var(--fs-h3)}.section{padding-top:48px;padding-bottom:48px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media(max-width:640px){
  :root{--gutter:20px}
  .no-break{white-space:normal}
  .display{font-size:var(--fs-display-mobile);line-height:1.1}
  .btn-primary,.btn-ghost{min-height:44px}
  .trust{gap:8px 16px}.topbar__tools>.language{display:none}
  .tilt,.chip-card--lock{transform:none}
  .decor-zone{max-width:100%;overflow-x:clip}
  .topbar__in{gap:10px}.topbar__tools{gap:10px;margin-left:auto}
  .brand{gap:7px}.brand__en{font-size:var(--fs-body)}.brand__mark{width:23px;height:23px}
  .btn-login{padding-inline:13px}
  .footer-grid{grid-template-columns:1fr}.panel{padding:20px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}