:root{
  --bg:#F9F1E0;
  --bg-top:#FCF7EC;
  --bg-bottom:#F3E8D2;
  --panel:#FFFBF3;
  --panel-2:#F1E6D0;
  --border:#E3D5BC;
  --accent:#0B8BD3;
  --accent-2:#3FB2EC;
  --accent-dark:#07639C;
  --ink:#2A1F15;
  --ink-2:#3A2C20;
  --muted:#6E5F4E;
  --success:#2E8B57;
  --success-pill:#E2F0E3;
  --warn:#C77A12;
  --error:#C2412D;
  --white:#FFFFFF;
  --accent-a08:rgba(11,139,211,.08);
  --accent-a12:rgba(11,139,211,.12);
  --accent-a30:rgba(11,139,211,.30);
  --sea-glow:rgba(63,178,236,.10);
  --ink-a10:rgba(42,31,21,.10);
  --ink-a30:rgba(42,31,21,.30);
  --hi-white:rgba(255,255,255,.92);
  --on-dark:#F9F1E0;
  --on-dark-muted:rgba(249,241,224,.62);
  --on-dark-line:rgba(255,251,243,.14);
  --veil-color:rgba(42,31,21,.48);
  --flag-red:#D52B1E;
  --flag-white:#FFFFFF;
  --flag-blue:#253A80;
  --flag-edge:rgba(42,31,21,.16);
  --radius:6px;
  --radius-dot:1px;
  --circle:50%;
  --pill:999px;
  --shadow-tide:0 34px 80px -16px rgba(11,139,211,.12),0 10px 24px -10px rgba(11,139,211,.12);
  --shadow-chip:0 6px 16px -8px rgba(11,139,211,.12);
  --shadow-cta:0 14px 28px -12px rgba(11,139,211,.45);
  --shadow-deep:0 30px 64px -16px rgba(42,31,21,.48),0 12px 28px -12px rgba(11,139,211,.30);
  --hi-inset:inset 0 1px 0 rgba(255,255,255,.92);
  --btn-inset:inset 0 1px 0 rgba(255,255,255,.22);
  --font-display:Georgia,'Times New Roman','Songti SC','STSong','Source Han Serif SC','Noto Serif CJK SC','Hiragino Mincho ProN','Nanum Myeongjo',serif;
  --font-body:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --size-body:16px;
  --size-small:14px;
  --size-tag:13px;
  --size-display:clamp(52px,4.73vw,68px);
  --size-section:44px;
  --size-card:24px;
  --weight-body:400;
  --weight-medium:500;
  --weight-strong:600;
  --weight-bold:700;
  --weight-display:900;
  --leading-body:1.6;
  --leading-title:1.1;
  --tracking-title:-.02em;
  --gutter:32px;
  --wrap-width:1304px;
  --head-height:68px;
  --anchor-offset:84px;
  --toc-offset:84px;
  --toc-landing:164px;
  --space-section:72px;
  --ease-ui:.2s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:var(--anchor-offset)}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--size-body);font-weight:var(--weight-body);line-height:var(--leading-body);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
button:disabled{cursor:not-allowed}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--ink);overflow-wrap:break-word}
h1{font-family:var(--font-display);font-size:var(--size-display);font-weight:var(--weight-display);line-height:var(--leading-title);letter-spacing:var(--tracking-title)}
h2{font-family:var(--font-display);font-size:var(--size-section);font-weight:var(--weight-display);line-height:1.15;letter-spacing:var(--tracking-title)}
h3{font-size:var(--size-card);font-weight:var(--weight-bold);line-height:1.3}
ul,ol{margin:0;padding-left:1.5em}
button,a,summary,[role="tab"],input,select,textarea{touch-action:manipulation}
:where(a,button,summary,[role="tab"],input,select,textarea):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--wrap-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
.section-head{margin-bottom:32px}
.section-head h2{margin-top:16px}
.no-break{white-space:nowrap}
.hl{color:var(--accent)}
.muted{color:var(--muted)}
.mono-tag{display:inline-block;font-family:var(--font-mono);font-size:var(--size-tag);font-weight:var(--weight-bold);letter-spacing:.08em;text-transform:uppercase;color:var(--accent);line-height:20px}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
:where(.grid,.hero-grid,.footer-grid,.win-body,.win-plans,.band-row,.platform-grid)>*{min-width:0}
.panel,.card{min-width:0;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--hi-inset),var(--shadow-tide);padding:24px}
.panel-soft{background:var(--panel-2)}
.decor-section{position:relative;isolation:isolate;overflow-x:clip;max-width:100%}
.prose{min-width:0;max-width:860px}
.prose p,.prose ul,.prose ol,.prose blockquote,.prose pre{margin-top:20px}
.prose h2{margin-top:48px;font-size:32px}
.prose h3{margin-top:28px}
.prose a:not(.btn){text-decoration:underline;text-underline-offset:4px;color:var(--accent-dark)}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
p code,li code{background:var(--panel-2);padding:2px 5px;border-radius:var(--radius)}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--ink);color:var(--on-dark);border-radius:var(--radius);line-height:1.7}
pre code{overflow-wrap:normal;white-space:pre}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:52px;padding:0 26px;border-radius:var(--radius);font-size:var(--size-body);font-weight:var(--weight-strong);letter-spacing:.01em;flex-shrink:0;white-space:nowrap;transition:background-color var(--ease-ui),color var(--ease-ui)}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--accent);color:var(--white);box-shadow:var(--btn-inset),var(--shadow-cta)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark)}
.btn-ghost,.btn-secondary{border:1.5px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover,.btn-secondary:hover,.btn-ghost.is-hover{background:var(--ink);color:var(--on-dark)}
.btn:active,.btn.is-pressed{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--panel-2);color:var(--muted);border:1px solid var(--border);box-shadow:none;pointer-events:none}
.btn.is-focus{outline:2px solid var(--accent-dark);outline-offset:3px}
.cta-row{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.announce{background:var(--ink);color:var(--on-dark)}
.announce .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:44px}
.ann-text{display:flex;align-items:center;gap:14px;font-size:var(--size-small);min-width:0}
.ann-key{font-family:var(--font-mono);font-size:11.5px;font-weight:var(--weight-bold);letter-spacing:.12em;color:var(--accent-2)}
.ann-main{font-weight:var(--weight-strong)}
.ann-price{font-family:var(--font-mono);font-size:12.5px;color:var(--on-dark-muted);white-space:nowrap}
.ann-btn{flex:none;display:inline-flex;align-items:center;justify-content:center;gap:6px;height:30px;padding:0 16px;border-radius:var(--pill);background:var(--accent);color:var(--white);font-size:var(--size-tag);font-weight:var(--weight-strong);box-shadow:var(--btn-inset);transition:background-color var(--ease-ui)}
.ann-btn:hover{background:var(--accent-dark)}
.ann-btn svg{width:14px;height:14px}
.site-head{position:relative;z-index:50;background:var(--bg-top);border-bottom:1px solid var(--border)}
.site-head>.wrap{display:flex;align-items:center;gap:24px;height:var(--head-height)}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:34px;height:34px;flex:none}
.brand-word{font-family:var(--font-display);font-size:23px;font-weight:var(--weight-bold);letter-spacing:var(--tracking-title);color:var(--ink)}
.brand-zh{font-size:var(--size-small);color:var(--muted);font-weight:var(--weight-medium)}
.nav{flex:1;display:flex;justify-content:center}
.nav ul{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav a{display:flex;align-items:center;gap:6px;height:36px;padding:0 11px;border-radius:var(--radius);font-size:14.5px;font-weight:var(--weight-medium);color:var(--muted);white-space:nowrap;transition:background-color var(--ease-ui),color var(--ease-ui)}
.nav a:hover{color:var(--ink);background:var(--panel-2)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:var(--weight-strong);background:var(--panel-2)}
.nav svg{width:16px;height:16px;flex:none}
.nav-tools{display:flex;align-items:center;gap:16px;flex:none;position:relative}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;min-height:44px;width:auto;font-size:var(--size-small);color:var(--muted)}
.lang-switch span{white-space:nowrap}
.lang-switch svg{width:16px;height:16px}
.lang-menu{position:absolute;right:0;top:calc(100% + 12px);width:190px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-tide);z-index:55}
.lang-menu a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 12px;border-radius:var(--radius)}
.lang-menu a:hover,.lang-menu a[aria-current="true"]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:38px;padding:0 18px;border:1.5px solid var(--ink);border-radius:var(--radius);background:var(--panel);font-size:var(--size-small);font-weight:var(--weight-strong);color:var(--ink);white-space:nowrap;transition:background-color var(--ease-ui),color var(--ease-ui)}
.btn-login:hover{background:var(--ink);color:var(--on-dark)}
.btn-login svg{width:16px;height:16px}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--radius);background:var(--panel)}
.menu-toggle svg{width:22px;height:22px}
.mobile-drawer{display:none}
.menu-veil{display:none;position:fixed;inset:112px 0 0;background:var(--veil-color);z-index:10}
.site-footer{background:var(--panel-2);border-top:1px solid var(--border);padding-top:56px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:18px;max-width:320px;color:var(--muted);font-size:var(--size-small)}
.footer-title{font-family:var(--font-mono);font-size:var(--size-tag);font-weight:var(--weight-bold);margin-bottom:12px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;font-size:var(--size-small);color:var(--muted);padding-block:3px}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:40px;padding-top:20px;border-top:1px solid var(--border);font-size:var(--size-small);color:var(--muted)}
.footer-legal{display:flex;gap:20px;flex-wrap:wrap}
.footer-legal a{display:inline-flex;align-items:center;min-height:30px}
.reveal{transition:opacity .6s ease,transform .6s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:static;display:block;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
@media(max-width:1180px){
  .nav{display:none}
  .nav-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{position:absolute;top:100%;left:0;right:0;z-index:25;background:var(--panel);border-top:1px solid var(--border);padding:16px var(--gutter);max-height:calc(100dvh - 112px);overflow-y:auto;overscroll-behavior:contain}
  .mobile-drawer:not([hidden]){display:block}
  .mobile-drawer ul{list-style:none;margin:0;padding:0}
  .mobile-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--radius)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--panel-2)}
  .mobile-drawer svg{width:18px;height:18px}
  .drawer-language-title{margin-top:16px;padding:12px 16px;border-top:1px solid var(--border);color:var(--muted);font-size:var(--size-tag)}
  .menu-veil:not([hidden]){display:block}
}
@media(max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:780px){.ann-price{display:none}}
@media(max-width:768px){
  :root{--size-display:40px;--size-section:32px;--space-section:48px}
}
@media(max-width:640px){
  :root{--gutter:20px}
  .no-break{white-space:normal}
  .wrap{padding-inline:var(--gutter)}
  .site-head>.wrap{gap:12px}
  .nav-tools{gap:8px;margin-left:auto}
  .nav-tools>.lang-switch{display:none}
  .btn-login{padding-inline:12px}
  .brand-word{font-size:21px}
  .brand-mark{width:30px;height:30px}
  .ann-text{font-size:12px}
  .ann-key{display:none}
  .announce .wrap{gap:10px;padding-block:6px}
  .ann-btn{padding-inline:10px;font-size:12px}
  .grid,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{gap:28px}
  .panel,.card{padding:20px}
  .tilt,.tilt-card,[data-tilt]{transform:none}
  .decor-section{max-width:100%;overflow-x:clip}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none}
}