:root {
  --bg:#F9F9FB;
  --panel:#FFFFFF;
  --panel-2:#F1EFF6;
  --border:#E4E1EC;
  --accent:#8A3CEB;
  --accent-dark:#6523C4;
  --text:#221F2B;
  --muted:#5E5A6E;
  --success:#1FA971;
  --warn:#E9A21C;
  --error:#D8434E;
  --on-accent:#FFFFFF;
  --mist-sky:#D8EBFB;
  --mist-lav:#EEE6FA;
  --mist-blush:#F9DDE9;
  --spot-sky:#C2E0FA;
  --cloud-a:rgb(255 255 255 / .55);
  --cloud-b:rgb(255 255 255 / .36);
  --top-veil:rgb(255 255 255 / .34);
  --ribbon-pink:#F7A8D3;
  --ribbon-sky:#9CD0F7;
  --ribbon-mint:#A8F0DE;
  --honey:#F3C24F;
  --dot-pink:#F39BC4;
  --box-top:#EDE4FF;
  --box-front-a:#C4AAFB;
  --box-front-b:#9C74F2;
  --box-side:#8458E6;
  --mini-lav-top:#EFE7FF;
  --mini-lav-a:#D4C0FC;
  --mini-lav-b:#A986F4;
  --mini-lav-side:#8F68E8;
  --mini-sky-top:#E6F2FD;
  --mini-sky-a:#C3DEF8;
  --mini-sky-b:#93C1EE;
  --mini-sky-side:#7EABE0;
  --wing-b:#E2D6FA;
  --plane-a:#E6DCFA;
  --plane-b:#CDBBF3;
  --toggle-a:#B793F6;
  --toggle-b:#9C74F2;
  --chrome-bar:#F6F3FB;
  --rule-soft:#EFEAF7;
  --flag-red:#D93A49;
  --flag-blue:#2E4A9A;
  --flag-green:#2B9A5B;
  --flag-white:#FFFFFF;
  --feat-a:#F3D9F0;
  --feat-b:#CFE6FB;
  --dot-ink:rgb(101 35 196 / .08);
  --glass:rgb(255 255 255 / .62);
  --glass-edge:rgb(255 255 255 / .85);
  --hi-40:rgb(255 255 255 / .42);
  --hi-25:rgb(255 255 255 / .25);
  --accent-12:rgb(138 60 235 / .12);
  --success-12:rgb(31 169 113 / .12);
  --rule-mist:rgb(101 35 196 / .12);
  --login-bg:#F1EAFE;
  --login-edge:#DCCBFA;
  --shadow-panel:0 18px 40px rgb(138 60 235 / .10),0 2px 6px rgb(138 60 235 / .06),inset 0 1px 0 rgb(255 255 255 / .9);
  --shadow-soft:0 8px 24px rgb(138 60 235 / .08);
  --shadow-cta:0 12px 28px rgb(138 60 235 / .28);
  --r-sm:8px;
  --r-xs:6px;
  --r-pill:999px;
  --font-display:Georgia,"Source Han Serif SC","Noto Serif SC","Songti SC","STSong","Hiragino Mincho ProN","Yu Mincho","Batang","SimSun",serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Apple SD Gothic Neo","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --gutter:32px;
  --header-height:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 16px);-webkit-text-size-adjust:100%}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img,svg{max-width:100%}
img{height:auto}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3{color:var(--text);line-height:1.2;text-wrap:balance}
h1,h2{font-family:var(--font-display);font-weight:700}
h1{font-size:clamp(52px,4.75vw,68px);letter-spacing:-.02em}
h2{font-size:clamp(30px,3vw,40px)}
h3{font-size:21px}
p{margin-top:0}
code,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto}
pre code{overflow-wrap:normal}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-xs)}
.shell,.wrap{width:100%;max-width:1376px;margin-inline:auto;padding-inline:var(--gutter)}
.wrap{max-width:1200px}
.shell>*,.wrap>*,.hero-inner>*,.card-grid>*,.plan-grid>*{min-width:0}
.no-break{white-space:nowrap}
.sec{padding-top:80px;padding-bottom:80px}
.section-heading{max-width:720px;margin-bottom:32px}
.section-heading p{color:var(--muted)}
.eyebrow{font:600 12px/1.5 var(--font-mono);letter-spacing:.09em;color:var(--accent-dark)}
.panel,.card{background:var(--panel);border-radius:var(--r-sm);box-shadow:var(--shadow-panel)}
.card{padding:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 28px;border:0;border-radius:var(--r-sm);font:600 16px/1 var(--font-body);white-space:nowrap;flex-shrink:0;transition:background-color .2s,transform .2s,box-shadow .2s}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:var(--shadow-cta),inset 0 1px 0 var(--hi-25)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-ghost,.btn-secondary{background:var(--panel);color:var(--text);box-shadow:inset 0 0 0 1px var(--border),var(--shadow-soft)}
.btn-ghost:hover,.btn-secondary:hover{box-shadow:inset 0 0 0 1px var(--box-front-a),var(--shadow-soft)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn-sm{min-height:44px;padding-inline:22px;font-size:15px}
.reveal{transition:opacity .55s ease,transform .55s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.topbar{position:relative;z-index:20;background:var(--panel);box-shadow:0 1px 0 var(--border)}
.topbar-inner{min-height:var(--header-height);display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;min-height:44px}
.brand-mark{width:34px;height:34px;display:block;flex:none}
.brand-en{font:700 21px/1 var(--font-display);letter-spacing:.01em}
.brand-zh{font-size:13px;font-weight:500;color:var(--muted);padding-left:10px;border-left:1px solid var(--border)}
.mainnav{flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.mainnav a{display:block;padding:8px 14px;border-radius:var(--r-pill);font-size:14.5px;line-height:1.4;white-space:nowrap;color:var(--muted);transition:color .2s,background-color .2s}
.mainnav a:hover{color:var(--text)}
.mainnav a.is-current{background:var(--panel-2);color:var(--text);font-weight:600;box-shadow:inset 0 0 0 1px var(--border)}
.topbar-tools{display:flex;align-items:center;gap:8px;flex:none;margin-left:auto}
.lang-switch{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;width:auto;padding:0 12px;border:0;background:transparent;border-radius:var(--r-sm);font-size:14px;font-weight:500;color:var(--muted);white-space:nowrap}
.lang:hover{background:var(--panel-2);color:var(--text)}
.lang svg{width:16px;height:16px;flex:none}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:30;min-width:160px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-sm);box-shadow:var(--shadow-panel)}
.lang-menu[hidden],.mobile-menu[hidden],.menu-veil[hidden]{display:none!important}
.lang-menu a{display:flex;align-items:center;min-height:42px;padding-inline:12px;border-radius:var(--r-xs);font-size:14px}
.lang-menu a:hover,.lang-menu a[aria-current]{background:var(--panel-2)}
.tools-rule{width:1px;height:20px;background:var(--border)}
.login{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 22px;border-radius:var(--r-sm);background:var(--login-bg);box-shadow:inset 0 0 0 1px var(--login-edge);font-size:14.5px;font-weight:600;color:var(--accent-dark);white-space:nowrap}
.login:hover{background:var(--panel-2)}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:0;background:var(--panel-2);border-radius:var(--r-sm);color:var(--text)}
.menu-toggle svg{width:22px;height:22px}
.menu-veil{position:fixed;inset:var(--header-height) 0 0;z-index:18;background:var(--accent-12)}
.mobile-menu{position:absolute;top:100%;left:0;right:0;z-index:21;max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--panel);box-shadow:var(--shadow-panel);padding:12px var(--gutter) 22px}
.mobile-menu a{display:flex;width:100%;align-items:center;min-height:48px;padding:10px 14px;border-radius:var(--r-sm);font-size:15px}
.mobile-menu a.is-current,.mobile-menu a:hover{background:var(--panel-2)}
.mobile-menu .menu-language{border-top:1px solid var(--border);padding-top:12px;margin-top:12px}
.site-footer{padding-top:64px;background:var(--panel);border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:minmax(230px,1.3fr) repeat(2,minmax(0,1fr));gap:48px;padding-bottom:56px}
.footer-about{max-width:340px;color:var(--muted);font-size:14px}
.footer-about .brand{margin-bottom:16px;color:var(--text)}
.footer-title{margin:0 0 14px;font:600 12px var(--font-mono);letter-spacing:.08em;color:var(--accent-dark)}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;color:var(--muted)}
.footer-links a:hover{color:var(--accent-dark)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:20px;padding-bottom:24px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.footer-bottom a{margin-left:18px}
.footer-bottom a:hover{color:var(--accent-dark)}
.hero{position:relative;display:flex;align-items:center;min-height:clamp(680px,calc(100svh - 128px),860px);max-width:100%;overflow:clip;isolation:isolate;background:linear-gradient(180deg,var(--top-veil) 0%,transparent 42%),radial-gradient(34% 40% at 86% 12%,var(--spot-sky) 0%,transparent 72%),radial-gradient(42% 26% at 10% 86%,var(--cloud-a) 0%,transparent 72%),radial-gradient(36% 24% at 56% 72%,var(--cloud-b) 0%,transparent 72%),linear-gradient(158deg,var(--mist-sky) 0%,var(--mist-lav) 50%,var(--mist-blush) 100%)}
.hero-grain{position:absolute;inset:0;width:100%;height:100%;opacity:.04;pointer-events:none;z-index:0}
.hero-inner{position:relative;z-index:1;width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center;padding-top:40px;padding-bottom:48px}
.hero-copy{position:relative;z-index:2}
.kicker{display:inline-flex;align-items:center;gap:10px;margin:0 0 24px;padding:6px 16px 6px 8px;border-radius:var(--r-pill);background:var(--glass);box-shadow:inset 0 0 0 1px var(--glass-edge),var(--shadow-soft);font-size:13px;line-height:1.4}
.kicker svg{width:20px;height:20px;flex:none;display:block}
.kicker-main{font-weight:600}
.kicker-dot{width:4px;height:4px;border-radius:50%;background:var(--box-front-b);flex:none}
.kicker-mono{font:12px var(--font-mono);letter-spacing:.02em;color:var(--muted)}
.hero-title{margin:0 0 32px;font:700 clamp(52px,4.75vw,68px)/1.1 var(--font-display);letter-spacing:-.02em}
.t-brand,.t-line{display:block}
.t-brand{letter-spacing:-.01em}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
.hero-lede{margin:0 0 32px;max-width:34em;font-size:18px;line-height:1.75;color:var(--muted)}
.hero-lede strong{color:var(--text);font-weight:600}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 16px;margin-bottom:24px;font-size:14px;line-height:1.5}
.trust-row li{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.tick{width:16px;height:16px;flex:none}
.tick-bg{fill:var(--accent-12)}
.tick-mark{fill:none;stroke:var(--accent-dark);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.hero-meta{display:grid;gap:12px;padding-top:20px;border-top:1px solid var(--rule-mist);max-width:600px}
.meta-row{display:flex;align-items:center;gap:16px}
.meta-label{flex:none;width:64px;font:11.5px/1 var(--font-mono);letter-spacing:.08em;color:var(--muted)}
.plat-list,.flag-list{display:flex;flex-wrap:wrap;gap:8px 18px}
.plat-list li,.flag-list li{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;white-space:nowrap}
.plat-ico{width:18px;height:18px;flex:none;display:block;color:var(--text)}
.flag{width:22px;height:16px;flex:none;display:block}
.fl-red{fill:var(--flag-red)}.fl-white{fill:var(--flag-white)}.fl-blue{fill:var(--flag-blue)}.fl-green{fill:var(--flag-green)}
.fl-edge{fill:none;stroke:var(--border);stroke-width:.8}
.hero-stage{position:relative;z-index:1;width:100%;max-width:640px;justify-self:end}
.stage-svg{display:block;width:100%;height:auto;overflow:visible}
.st-front-a{stop-color:var(--box-front-a)}.st-front-b{stop-color:var(--box-front-b)}
.st-white{stop-color:var(--panel)}.st-wing{stop-color:var(--wing-b)}
.st-toggle-a{stop-color:var(--toggle-a)}.st-toggle-b{stop-color:var(--toggle-b)}
.st-lav-a{stop-color:var(--mini-lav-a)}.st-lav-b{stop-color:var(--mini-lav-b)}
.st-sky-a{stop-color:var(--mini-sky-a)}.st-sky-b{stop-color:var(--mini-sky-b)}
.st-accent{stop-color:var(--accent)}.st-pink{stop-color:var(--ribbon-pink)}
.st-sky{stop-color:var(--ribbon-sky)}.st-mint{stop-color:var(--ribbon-mint)}
.fx-accent{flood-color:var(--accent)}
.ribbon{fill:none;stroke-width:12;stroke-linecap:round}
.spark{fill:var(--panel)}.spark-halo{fill:var(--panel);opacity:.35}
.box-top{fill:var(--box-top)}.box-top-hi{fill:var(--panel);opacity:.38}
.box-side{fill:var(--box-side)}
.hi-edge{fill:none;stroke:var(--hi-40);stroke-width:1;stroke-linejoin:round;stroke-linecap:round}
.wing-soft{fill:var(--panel);opacity:.6}
.eye-w{fill:var(--panel)}.eye-p{fill:var(--text)}
.slot{fill:none;stroke:var(--accent-dark);stroke-opacity:.5;stroke-width:3.2;stroke-linecap:round}
.win{fill:var(--panel)}.chrome{fill:var(--chrome-bar)}
.rule{stroke:var(--rule-soft);stroke-width:1}
.c-pink{fill:var(--dot-pink)}.c-honey{fill:var(--honey)}.c-green{fill:var(--success)}
.w-title{font:600 10px var(--font-mono);letter-spacing:.08em;fill:var(--text)}
.w-label{font:500 8.5px var(--font-mono);letter-spacing:.04em;fill:var(--muted)}
.w-value{font:600 11.5px var(--font-body);fill:var(--text)}
.w-status{font:600 9.5px var(--font-body);fill:var(--success)}
.pill-ok{fill:var(--success-12)}.dot-ok{fill:var(--success)}
.knob{fill:var(--panel)}.tag-soft{fill:var(--panel-2)}
.w-tag{font:600 9.5px var(--font-mono);fill:var(--accent-dark)}
.mb-top-lav{fill:var(--mini-lav-top)}.mb-side-lav{fill:var(--mini-lav-side)}
.mb-top-sky{fill:var(--mini-sky-top)}.mb-side-sky{fill:var(--mini-sky-side)}
.mb-led{fill:var(--success)}.tag-card{fill:var(--panel)}
.tag-text{font:500 10px var(--font-body);fill:var(--text)}
.plane-a{fill:var(--plane-a)}.plane-b{fill:var(--plane-b)}
.stage-card{position:absolute;left:0;top:61%;z-index:2;transform-origin:left top}
.stage-card-body{display:flex;align-items:center;gap:10px;padding:10px 16px 10px 10px;background:var(--panel);border-radius:var(--r-sm);box-shadow:var(--shadow-panel)}
.card-ico{width:34px;height:34px;border-radius:var(--r-xs);background:var(--panel-2);display:grid;place-items:center;color:var(--accent-dark);flex:none}
.card-ico svg{width:20px;height:20px}
.card-txt{display:grid;gap:3px}
.card-label{font:10.5px/1.2 var(--font-mono);letter-spacing:.06em;color:var(--muted)}
.card-value{font-size:15px;line-height:1.2;font-weight:600}
.stage-capsule{position:absolute;right:0;top:78%;z-index:2;transform-origin:right top}
.capsule-body{display:flex;align-items:center;gap:10px;height:40px;padding:0 18px 0 14px;border-radius:var(--r-pill);background:var(--glass);backdrop-filter:blur(14px) saturate(1.2);box-shadow:var(--shadow-panel),inset 0 0 0 1px var(--glass-edge);white-space:nowrap}
.capsule-body svg{width:16px;height:16px;flex:none;color:var(--accent-dark)}
.cap-item{display:inline-flex;align-items:baseline;gap:4px}
.cap-num{font:600 13.5px var(--font-mono)}
.cap-unit{font-size:12.5px;color:var(--muted)}
.cap-sep{width:1px;height:14px;background:var(--border)}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@keyframes bob-sm{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@keyframes ground{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.72;transform:scale(.94)}}
@keyframes glow{0%,100%{opacity:.2}50%{opacity:.95}}
.float-main{animation:bob 6s ease-in-out infinite}
.ground{transform-box:fill-box;transform-origin:center;animation:ground 6s ease-in-out infinite}
.float-a{animation:bob-sm 5.4s ease-in-out -.6s infinite}
.float-b{animation:bob-sm 6.2s ease-in-out -2s infinite}
.float-c{animation:bob-sm 5.8s ease-in-out -3.1s infinite}
.float-d{animation:bob-sm 6.6s ease-in-out -1.4s infinite}
.float-e{animation:bob-sm 5s ease-in-out -2.6s infinite}
.float-f{animation:bob-sm 7s ease-in-out -1s infinite}
.float-g{animation:bob-sm 6.4s ease-in-out -3s infinite}
.sp1{animation:glow 3.6s ease-in-out infinite}
.sp2{animation:glow 4.2s ease-in-out -1.4s infinite}
.sp3{animation:glow 3.9s ease-in-out -2.6s infinite}
#server-status{position:relative;display:block;max-width:100%;overflow:hidden;margin-bottom:32px}
#server-status+*{margin-top:32px}
body:has(.toc-tabs) section[id]{scroll-margin-top:calc(var(--header-height) + 84px)}
@media(max-width:1180px){.mainnav{display:none}.menu-toggle{display:inline-flex}.stage-card,.stage-capsule{transform:scale(.86)}}
@media(max-width:768px){
 :root{--gutter:20px;--header-height:64px}
 .topbar-inner{gap:6px}
 .topbar-tools{margin-left:auto;gap:4px}
 .tools-rule{display:none}
 .lang{padding-inline:6px}
 h1,.hero-title{font-size:clamp(28px,8vw,40px)}
 .hero{min-height:auto}
 .hero-inner{grid-template-columns:1fr;gap:24px;padding-top:32px;padding-bottom:40px}
 .hero-stage{width:88%;max-width:520px;justify-self:center}
 .mini-hk,.mini-it,.stage-card{display:none}
 .stage-capsule{left:0;right:0;top:auto;bottom:2%;display:flex;justify-content:center;transform:none}
 .capsule-body{height:34px;gap:8px;padding:0 14px 0 12px}
 .cap-num{font-size:12px}.cap-unit{font-size:11px}
 .hero-lede{font-size:17px}.trust-row{font-size:13.5px}
 .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
 .footer-about{grid-column:1/-1}
}
@media(max-width:640px){
 :root{--gutter:16px}
 .no-break{white-space:normal}
 .tilt,.tilt-card,[data-tilt]{transform:none!important}
 .sec{padding-top:56px;padding-bottom:56px}
 .brand-zh{display:none}
 .hero-title{margin-bottom:24px}
 .hero-lede{font-size:16px}
 .meta-row{flex-direction:column;align-items:flex-start;gap:8px}
 .btn{padding-inline:20px}
 .footer-grid{grid-template-columns:1fr}
 .footer-about{grid-column:auto}
}
@media(max-width:370px){.topbar-inner{gap:5px}.brand-en{font-size:18px}.login{padding-inline:10px}.lang{padding-inline:4px}}
@media(prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{animation:none!important;transition:none!important}
 .reveal,.reveal.pending{opacity:1;transform:none}
}