:root{
  --bg:#E7EDF7;
  --bg-panel:#F7F9FD;
  --bg-panel-2:#D8E1F0;
  --border:#C8D3E6;
  --accent:#D6492A;
  --accent-dark:#A9361C;
  --accent-2:#EE7A3C;
  --text:#162033;
  --text-muted:#55617A;
  --success:#13845A;
  --warn:#B7791F;
  --error:#C42340;
  --white:#FFFFFF;
  --hero-top:#F1F5FB;
  --hero-bottom:#E2E9F5;
  --plate-a:#C9D4E6;
  --plate-b:#9DAECB;
  --stage-bottom:#AFBDD6;
  --window-edge:#D3DCEA;
  --flag-red:#D43A2F;
  --flag-blue:#233A7A;
  --flag-white:#FFFFFF;
  --ink-05:rgba(22,32,51,.05);
  --ink-06:rgba(22,32,51,.06);
  --ink-08:rgba(22,32,51,.08);
  --ink-12:rgba(22,32,51,.12);
  --ink-20:rgba(22,32,51,.20);
  --accent-tint:rgba(214,73,42,.10);
  --accent-tint-soft:rgba(214,73,42,.06);
  --accent-tint-strong:rgba(214,73,42,.22);
  --accent-glow:rgba(214,73,42,.20);
  --accent-shadow:rgba(214,73,42,.34);
  --accent-shadow-soft:rgba(214,73,42,.10);
  --success-tint:rgba(19,132,90,.10);
  --white-10:rgba(255,255,255,.10);
  --hi-line:rgba(255,255,255,.40);
  --hi-line-soft:rgba(255,255,255,.24);
  --hi-on-accent:rgba(255,255,255,.28);
  --on-ink-muted:rgba(255,255,255,.72);
  --wash-warm:rgba(214,73,42,.04);
  --wash-cool:rgba(52,96,178,.04);
  --veil:rgba(22,32,51,.36);
  --clear:transparent;
  --shadow-card:0 30px 70px -18px var(--accent-shadow-soft),0 8px 18px -10px var(--ink-12);
  --shadow-chip:0 14px 30px -12px var(--accent-shadow-soft),0 3px 8px -4px var(--ink-12);
  --shadow-panel:0 24px 48px -20px var(--accent-shadow-soft),0 6px 14px -8px var(--ink-12);
  --r-xs:4px;
  --r-flag:3px;
  --r-row:6px;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:12px;
  --r-pill:999px;
  --r-round:50%;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(52px,calc(5.1vw - 9px),64px);
  --size-h2:40px;
  --size-h3:22px;
  --weight-display:900;
  --weight-strong:700;
  --gutter:64px;
  --content-max:1312px;
  --anchor-offset:84px;
  --toc-offset:84px;
  --section-anchor:160px;
  --speed-fast:.15s;
  --speed-reveal:.55s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,summary,a{-webkit-tap-highlight-color:var(--accent-tint)}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-sm)}
[hidden]{display:none!important}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
h1,h2,h3{font-family:var(--font-display);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);font-weight:var(--weight-display);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--size-h2);font-weight:var(--weight-display);line-height:1.2;letter-spacing:-.02em}
h3{font-size:var(--size-h3);line-height:1.4}
p{margin:0 0 1em}
code{font-family:var(--font-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--text);color:var(--bg-panel);border-radius:var(--r-sm)}
pre code{overflow-wrap:normal;white-space:pre}
blockquote{margin-inline:0}
table{border-collapse:collapse}
.shell,.wrap{width:100%;max-width:calc(var(--content-max) + var(--gutter) * 2);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:80px}
.reading-wrap{max-width:960px;margin-inline:auto;padding-inline:var(--gutter)}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.85}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.5em}
.prose a{text-underline-offset:4px}
.no-break{white-space:nowrap}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.section-title{margin:0 0 32px;text-align:center}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.card,.panel{min-width:0;padding:24px;border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-panel);box-shadow:var(--shadow-panel),inset 0 1px 0 var(--white)}
.panel-inset{background:var(--bg-panel-2);box-shadow:inset 0 1px 3px var(--ink-08)}
.decor-section{position:relative;overflow-x:clip}
.decor-layer{position:absolute;inset:0;pointer-events:none;max-width:100%}
.decor-line{fill:none;stroke:var(--accent);stroke-width:2}
#server-status{position:relative;display:block;min-height:80px;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
.reveal{transition:opacity var(--speed-reveal) ease,transform var(--speed-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}

/* Shared paint for inline flags and symbols. */
.fr{fill:var(--flag-red)}
.fw{fill:var(--flag-white)}
.fb{fill:var(--flag-blue)}
.sw{fill:none;stroke:var(--flag-white)}
.sr{fill:none;stroke:var(--flag-red)}
.f-edge{fill:none;stroke:var(--ink-12);stroke-width:.6}
.stop-accent{stop-color:var(--accent)}
.stop-accent-2{stop-color:var(--accent-2)}
.logo-globe{fill:none;stroke:var(--white)}

/* Announcement and masthead. */
.notice{background:var(--text);color:var(--white);font-size:14px;line-height:20px}
.notice-in{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px 12px;min-height:40px;padding-top:10px;padding-bottom:10px}
.notice-flag{width:16px;height:16px;flex:none}
.notice-flag path{fill:var(--white)}
.notice-flag .pole{fill:none;stroke:var(--white)}
.notice-sub{color:var(--on-ink-muted);font-family:var(--font-mono);font-size:13px}
.notice-link{color:var(--white);font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;min-height:24px}
.notice-link:hover{text-decoration-thickness:2px}
.masthead{position:relative;z-index:30;background:var(--hero-top);border-bottom:1px solid var(--ink-06)}
.masthead-in{position:relative;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;justify-self:start;flex-shrink:0}
.brand-mark{width:32px;height:32px;flex:none;filter:drop-shadow(0 6px 10px var(--accent-tint-strong))}
.brand-en{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.01em;color:var(--text)}
.brand-zh{font-size:14px;font-weight:500;color:var(--text-muted)}
.nav{display:flex;align-items:center;gap:2px}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav-link{position:relative;display:inline-flex;align-items:center;gap:4px;height:36px;padding:0 12px;border-radius:var(--r-sm);font-size:15px;font-weight:500;color:var(--text);text-decoration:none;cursor:pointer;transition:background-color var(--speed-fast) ease}
.nav-link:hover{background:var(--ink-05)}
.nav-link[aria-current="page"],.menu-link[aria-current="page"]{font-weight:700}
.nav-link[aria-current="page"]::after{content:"";position:absolute;left:50%;bottom:2px;width:16px;height:2px;margin-left:-8px;border-radius:var(--r-pill);background:var(--accent)}
.chev{width:14px;height:14px;flex:none;transition:transform var(--speed-fast) ease}
.chev path{fill:none;stroke:currentColor}
.nav-more{position:relative}
.nav-more>summary{list-style:none}
.nav-more>summary::-webkit-details-marker{display:none}
.nav-more[open] .chev{transform:rotate(180deg)}
.nav-more-panel{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);display:grid;grid-template-columns:1fr 1fr;gap:16px;width:360px;padding:16px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-panel),inset 0 1px 0 var(--white)}
.menu-group-title{margin:0 0 6px;padding:0 10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--text-muted)}
.menu-link{display:block;padding:8px 10px;border-radius:var(--r-row);font-size:14px;font-weight:500;text-decoration:none;min-height:36px}
.menu-link:hover{background:var(--accent-tint-soft);color:var(--accent-dark)}
.tools{display:flex;align-items:center;justify-content:flex-end;gap:8px}
.language-picker{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;min-width:44px;width:auto;padding:0 10px;border:0;border-radius:var(--r-sm);background:var(--clear);font:inherit;font-size:14px;font-weight:500;color:var(--text);cursor:pointer}
.lang span{white-space:nowrap}
.lang:hover{background:var(--ink-05)}
.lang-ico{width:16px;height:16px;flex:none}
.lang-ico circle,.lang-ico path,.lang-ico ellipse{fill:none;stroke:currentColor}
.language-menu{position:absolute;right:0;top:calc(100% + 10px);width:190px;padding:8px;border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-panel);box-shadow:var(--shadow-panel)}
.language-menu a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-row)}
.language-menu a:hover,.language-menu a[aria-current]{background:var(--accent-tint);color:var(--accent-dark)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 18px;border-radius:var(--r-sm);background:var(--text);color:var(--white);font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hi-line-soft),0 6px 14px -8px var(--ink-20);transition:transform var(--speed-fast) ease}
.btn-login:hover{transform:translateY(-1px)}
.mobile-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--bg-panel)}
.burger{width:18px;height:18px}
.burger path{fill:none;stroke:var(--text)}
.mobile-drawer{position:absolute;z-index:32;left:var(--gutter);right:var(--gutter);top:68px;padding:12px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-panel);max-height:calc(100dvh - 120px);overflow-y:auto;overscroll-behavior:contain}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 12px;text-decoration:none;border-radius:var(--r-row)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--accent-tint);color:var(--accent-dark)}
.drawer-languages{border-top:1px solid var(--border);margin-top:12px;padding-top:12px}
.nav-veil{position:fixed;inset:108px 0 0;z-index:25;border:0;background:var(--veil);width:100%}
.nav-mobile{display:none;position:relative}
.nav-mobile>summary{list-style:none;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--bg-panel);cursor:pointer}
.nav-mobile>summary::-webkit-details-marker{display:none}
.nav-mobile-panel{position:absolute;right:0;top:calc(100% + 10px);width:240px;max-height:calc(100dvh - 120px);overflow-y:auto;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-panel)}
.nav-mobile-panel a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 12px;text-decoration:none}

/* Hero approved geometry. */
.hero{position:relative;background:linear-gradient(180deg,var(--hero-top) 0%,var(--hero-bottom) 100%);overflow-x:clip;max-width:100%}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,var(--wash-warm) 0%,var(--wash-cool) 100%);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:46fr 54fr;gap:56px;align-items:center;padding-top:56px;padding-bottom:48px}
.hero-copy{position:relative;z-index:2;min-width:0}
.hero-device{position:relative;z-index:1;min-width:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0;padding:6px 12px;border-radius:var(--r-sm);background:var(--accent-tint);color:var(--accent-dark);font-size:14px;font-weight:600;line-height:20px;max-width:100%;flex-wrap:wrap}
.eyebrow svg{width:14px;height:14px;flex:none}
.eyebrow svg path{fill:currentColor}
.eyebrow svg .pole{fill:none;stroke:currentColor}
.eyebrow-num{font-family:var(--font-mono);font-size:13px;font-weight:600}
.hero-title{margin:24px 0 0;font-family:var(--font-display);font-weight:900;font-size:var(--size-h1);line-height:1.1;letter-spacing:-.02em;color:var(--text)}
.t-line{display:block}
.kw-block{background-image:linear-gradient(90deg,var(--accent) 0%,var(--accent-2) 100%);background-repeat:no-repeat;background-size:100% .24em;background-position:0 86%;padding:0 .04em}
.hero-lede{margin:20px 0 0;max-width:28em;font-size:20px;line-height:1.6;color:var(--text-muted)}
.hero-lede strong{color:var(--text);font-weight:700}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:12px 26px;border:0;border-radius:var(--r-md);font-family:var(--font-body);font-size:16px;font-weight:600;line-height:1.5;text-decoration:none;transition:transform var(--speed-fast) ease,box-shadow var(--speed-fast) ease;flex-shrink:0;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{color:var(--white);background:linear-gradient(135deg,var(--accent) 0%,var(--accent-2) 100%);box-shadow:inset 0 1px 0 var(--hi-on-accent),0 14px 26px -12px var(--accent-shadow)}
.btn-primary svg{width:18px;height:18px}
.btn-primary svg path{fill:none;stroke:var(--white)}
.btn-ghost,.btn-secondary{color:var(--text);background:var(--bg-panel);border:1px solid var(--border);box-shadow:inset 0 1px 0 var(--white),0 4px 10px -6px var(--ink-12)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel-2);color:var(--text-muted);box-shadow:none;cursor:not-allowed;transform:none}
.btn-small{min-height:44px;padding:10px 16px;font-size:14px}
.signup-note{display:flex;align-items:center;gap:8px;margin:16px 0 0;font-size:14px;line-height:20px;color:var(--text-muted)}
.signup-note svg{width:18px;height:18px;flex:none}
.signup-note svg rect,.signup-note svg circle,.signup-note svg path{fill:none;stroke:currentColor}
.trust{display:flex;flex-wrap:wrap;gap:8px 20px;margin:12px 0 0;padding:0;list-style:none;font-size:14px;line-height:22px;color:var(--text)}
.trust li{display:inline-flex;align-items:center;gap:6px}
.trust svg{width:14px;height:14px;flex:none}
.trust svg path{fill:none;stroke:var(--success)}
.rails{display:grid;gap:12px;margin-top:32px;padding-top:24px;border-top:1px solid var(--ink-08)}
.rail{display:flex;align-items:center;gap:16px}
.rail-label{flex:none;width:64px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--text-muted)}
.rail-list{display:flex;flex-wrap:wrap;gap:8px 18px;margin:0;padding:0;list-style:none}
.rail-list li{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;line-height:24px;color:var(--text)}
.pf-icon{width:18px;height:18px;flex:none;color:var(--text)}
.flag{width:24px;height:16px;flex:none;border-radius:var(--r-flag);overflow:hidden;box-shadow:0 1px 2px var(--ink-12)}
.flag-sq{width:16px;height:16px}
.plate{position:relative;padding:88px 54px 140px 64px;border-radius:var(--r-lg);background:linear-gradient(140deg,var(--plate-a) 0%,var(--plate-b) 100%);box-shadow:inset 0 0 0 1px var(--hi-line),0 40px 80px -40px var(--accent-shadow-soft)}
.plate-clip{position:absolute;inset:0;border-radius:inherit;overflow:hidden;pointer-events:none}
.plate-clip::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 70% 55% at 18% 0%,var(--hi-line) 0%,var(--clear) 70%)}
.plate-globe{position:absolute;right:-90px;bottom:-150px;width:460px;height:460px;max-width:100%}
.plate-globe .g-face{fill:var(--white-10)}
.plate-globe .g-line{fill:none;stroke:var(--hi-line-soft);stroke-width:1}
.win-wrap{position:relative;z-index:1}
.win-wrap::before{content:"";position:absolute;left:18px;right:18px;bottom:-10px;height:40px;border-radius:var(--r-sm);background:var(--bg-panel);opacity:.55;box-shadow:var(--shadow-chip)}
.win{position:relative;background:var(--white);border:1px solid var(--window-edge);border-radius:var(--r-sm);box-shadow:var(--shadow-card),inset 0 1px 0 var(--white);overflow:hidden}
.win-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:40px;padding:0 14px;background:linear-gradient(180deg,var(--bg-panel) 0%,var(--white) 100%);border-bottom:1px solid var(--ink-06)}
.win-dots{display:flex;gap:6px}
.win-dots i{display:block;width:10px;height:10px;border-radius:var(--r-round);background:var(--border)}
.win-title{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--text)}
.win-title svg{width:16px;height:16px}
.win-body{display:grid;grid-template-columns:212px minmax(0,1fr)}
.side{padding:10px 8px;background:var(--bg-panel);border-right:1px solid var(--ink-06)}
.side-head{display:flex;justify-content:space-between;align-items:center;padding:4px 8px 8px;font-size:11px;line-height:14px;color:var(--text-muted)}
.side-head b{font-weight:600;color:var(--text);font-size:12px}
.side-head span{font-family:var(--font-mono)}
.routes{display:grid;gap:2px;margin:0;padding:0;list-style:none}
.route{display:flex;align-items:center;gap:8px;min-height:38px;padding:0 8px;border-radius:var(--r-row);font-size:13.5px;font-weight:600;color:var(--text)}
.route .flag{width:21px;height:14px}
.route .flag-sq{width:14px;height:14px}
.route.is-on{background:var(--accent-tint);box-shadow:inset 2px 0 0 var(--accent)}
.route-type{margin-left:auto;padding:2px 6px;border-radius:var(--r-xs);font-family:var(--font-mono);font-size:10.5px;font-weight:500;line-height:16px;white-space:nowrap}
.t-iepl{background:var(--ink-08);color:var(--text)}
.t-relay{background:var(--bg-panel-2);color:var(--text-muted)}
.t-direct{box-shadow:inset 0 0 0 1px var(--border);color:var(--text-muted)}
.side-foot{margin:8px 8px 0;padding-top:8px;border-top:1px dashed var(--border);font-family:var(--font-mono);font-size:11px;line-height:16px;color:var(--text-muted)}
.main{padding:16px;min-width:0}
.route-card{padding:14px;border-radius:var(--r-sm);background:linear-gradient(180deg,var(--white) 0%,var(--hero-top) 100%);border:1px solid var(--ink-08);box-shadow:inset 0 1px 0 var(--white),0 6px 16px -10px var(--accent-shadow-soft)}
.rc-label{margin:0;font-family:var(--font-mono);font-size:11px;line-height:14px;letter-spacing:.08em;color:var(--text-muted)}
.rc-head{display:flex;align-items:center;gap:10px;margin-top:8px;flex-wrap:wrap}
.rc-head .flag{width:26px;height:17px}
.rc-title{margin:0;font-size:17px;font-weight:800;line-height:24px;letter-spacing:-.01em;color:var(--text)}
.switch-wrap{display:inline-flex;align-items:center;gap:8px;margin-left:auto;font-size:12px;font-weight:600;color:var(--success)}
.switch{position:relative;display:block;width:38px;height:22px;border-radius:var(--r-pill);background:linear-gradient(135deg,var(--accent) 0%,var(--accent-2) 100%);box-shadow:inset 0 1px 2px var(--accent-shadow);flex:none}
.switch::after{content:"";position:absolute;top:3px;right:3px;width:16px;height:16px;border-radius:var(--r-round);background:var(--white);box-shadow:0 1px 3px var(--ink-20)}
.rc-rows{display:grid;gap:10px;margin-top:14px;padding-top:12px;border-top:1px dashed var(--border)}
.rc-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.rc-key{flex:none;width:32px;font-size:11px;color:var(--text-muted)}
.chip{padding:3px 8px;border-radius:var(--r-xs);background:var(--bg-panel);border:1px solid var(--ink-08);font-size:11.5px;font-weight:600;line-height:16px;color:var(--text);max-width:100%;overflow-wrap:anywhere}
.chip-mono{font-family:var(--font-mono);font-weight:500}
.chip.is-on{background:var(--accent-tint);border-color:var(--accent-tint-strong);color:var(--accent-dark)}
.plan{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;padding:12px 14px;border-radius:var(--r-sm);background:var(--bg-panel-2);box-shadow:inset 0 1px 2px var(--ink-08);flex-wrap:wrap}
.plan-key{display:block;font-size:12px;font-weight:700;line-height:16px;color:var(--text)}
.plan-note{display:block;margin-top:2px;font-size:11px;line-height:14px;color:var(--text-muted)}
.plan-val{font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--text);white-space:nowrap}
.beacon{position:absolute;z-index:3;top:52px;left:28px;display:flex;align-items:center;gap:10px;min-height:44px;padding:8px 18px 8px 14px;background:var(--white);border:2px solid var(--accent);border-radius:var(--r-pill);box-shadow:0 0 0 5px var(--accent-tint-soft),0 0 30px 2px var(--accent-glow),0 12px 24px -10px var(--accent-glow);max-width:calc(100% - 40px)}
.beacon svg{width:18px;height:18px;flex:none}
.beacon svg circle,.beacon svg ellipse,.beacon svg path{fill:none;stroke:var(--accent)}
.beacon-text{font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-dark)}
.devices{position:absolute;z-index:2;left:-24px;bottom:36px;width:300px;padding:14px;background:var(--white);border:1px solid var(--window-edge);border-radius:var(--r-md);box-shadow:var(--shadow-card),inset 0 1px 0 var(--white)}
.dev-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.dev-title{margin:0;font-size:13px;font-weight:700;line-height:20px;color:var(--text)}
.dev-tag{padding:2px 8px;border-radius:var(--r-pill);background:var(--success-tint);color:var(--success);font-size:11px;font-weight:600;line-height:16px}
.dev-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:0;padding:0;list-style:none}
.dev-tile{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 0 8px;border-radius:var(--r-sm);background:var(--bg-panel);border:1px solid var(--ink-06);font-size:10.5px;line-height:14px;color:var(--text-muted)}
.dev-tile svg{width:20px;height:20px;color:var(--text)}
.dev-dot{position:absolute;top:6px;right:6px;width:7px;height:7px;border-radius:var(--r-round);background:var(--success);box-shadow:0 0 0 2px var(--white)}
.refund-chip{position:absolute;z-index:2;right:28px;bottom:48px;display:flex;align-items:center;gap:8px;height:36px;padding:0 14px;border-radius:var(--r-pill);background:var(--bg-panel);border:1px solid var(--white);font-size:13px;font-weight:600;color:var(--text);box-shadow:var(--shadow-chip)}
.refund-chip svg{width:16px;height:16px;flex:none}
.refund-chip svg path{fill:none;stroke:var(--text)}
.factband{background:var(--bg-panel);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.factband-in{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px 24px;min-height:56px;padding-top:12px;padding-bottom:12px;font-family:var(--font-mono);font-size:13px;color:var(--text-muted)}
.factband b{margin-right:6px;font-size:15px;font-weight:700;color:var(--text)}
.next{padding-top:72px;padding-bottom:96px;background:var(--bg)}
.next-title{margin:0 0 32px;text-align:center;font-family:var(--font-display);font-weight:900;font-size:40px;line-height:1.2;letter-spacing:-.02em}

/* Shared footer. */
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:48px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{margin-top:20px;max-width:28em;color:var(--text-muted);font-size:14px}
.footer-heading{font-size:15px;font-weight:700;margin:0 0 16px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px;list-style:none;margin:0;padding:0}
.footer-links a,.footer-languages a,.legal-links a{display:inline-flex;align-items:center;min-height:32px;text-decoration:none;font-size:14px}
.footer-links a:hover,.footer-languages a:hover,.legal-links a:hover{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:32px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.legal-links{display:flex;flex-wrap:wrap;gap:8px 20px}
@media(max-width:1180px){.nav-link{padding:0 9px}}
@media(max-width:1023px){
  :root{--gutter:40px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-title{font-size:52px}
  .plate{max-width:720px}
}
@media(max-width:900px){
  .masthead-in{display:flex;justify-content:space-between}
  .nav{display:none}
  .tools{margin-left:auto}
  .mobile-toggle,.nav-mobile{display:inline-flex}
}
@media(max-width:768px){
  :root{--gutter:20px;--size-h1:40px;--size-h2:30px}
  .hero-grid{padding-top:32px;padding-bottom:40px;gap:40px}
  .hero-title{font-size:40px}
  .hero-lede{font-size:18px}
  .plate{padding:80px 16px 156px}
  .beacon{top:20px;left:12px}
  .devices{left:12px;bottom:16px;width:calc(100% - 24px)}
  .refund-chip{display:none}
  .notice{font-size:13px}
  .section{padding-top:48px;padding-bottom:56px}
  .grid-three,.footer-grid{grid-template-columns:1fr}
  .footer-grid{gap:28px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .win-body{grid-template-columns:1fr}
  .side{border-right:0;border-bottom:1px solid var(--ink-06)}
  .cta-row .btn{flex:1 1 auto}
  .lang-text{display:none}
  .next-title{font-size:30px}
  .tilt,[data-tilt]{transform:none}
  .decor-layer,.decor-section{max-width:100%}
  .tools{gap:4px;margin-left:auto}
  .btn-login{padding-inline:12px}
  .brand{gap:7px}
  .brand-en{font-size:17px}
  .brand-zh{display:none}
  .rail{align-items:flex-start;gap:8px}
  .rail-label{width:44px}
  .rail-list{gap:6px 12px}
  .win-bar{grid-template-columns:auto 1fr;gap:10px}
  .win-title{justify-self:center}
  .beacon-text{font-size:10px;letter-spacing:.1em}
  .dev-grid{gap:4px}
  .dev-tile{font-size:9px}
  .hero-title{font-size:clamp(28px,8vw,40px)}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  .btn,.btn-login,.nav-link,.chev{transition:none}
}