*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  min-height:100vh;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-weight:400;
  font-size:16px;
  line-height:1.75;
  color:var(--color-text);
  background:
    radial-gradient(circle at 82% 0%,rgba(155,93,229,.14),transparent 38%),
    radial-gradient(circle at 15% 100%,rgba(255,107,53,.08),transparent 42%),
    var(--color-bg);
}
:root{
  --color-bg:#0B1026;
  --color-bg-deep:#061224;
  --color-panel:#0B1F3A;
  --color-panel-2:#1B3A5C;
  --color-accent:#FF6B35;
  --color-accent-alt:#9B5DE5;
  --color-text:#F5F7FA;
  --color-text-dim:#A0AEC0;
  --color-success:#3DDC97;
  --color-warning:#FFD166;
  --border-color:rgba(245,247,250,.16);
  --border-strong:rgba(255,107,53,.72);
  --accent-rgb:255,107,53;
  --accent-alt-rgb:155,93,229;
  --header-h:96px;
  --header-rail-w:132px;
  --content-max:1400px;
  --content-pad:24px;
  --shadow:0 12px 38px rgba(0,0,0,.34);
  --clip-cut:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
[data-theme="light"]{
  --color-bg:#EAF0F8;
  --color-bg-deep:#D7E2F0;
  --color-panel:#F7FAFF;
  --color-panel-2:#C9D9EC;
  --color-text:#0B1F3A;
  --color-text-dim:#4A5A72;
  --border-color:rgba(11,31,58,.2);
  --border-strong:rgba(255,107,53,.8);
  --shadow:0 10px 30px rgba(11,31,58,.12);
}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
a{color:var(--color-accent-alt);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
a:hover{color:var(--color-accent)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
:focus-visible{outline:3px solid var(--color-warning);outline-offset:3px}
::selection{background:rgba(var(--accent-rgb),.38);color:var(--color-text)}
.container{max-width:var(--content-max);margin:0 auto;padding-inline:var(--content-pad)}
.section{padding-block:clamp(64px,8vw,120px)}
.section--tight{padding-block:clamp(40px,5vw,80px)}
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:900px){.grid--3{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.grid--2,.grid--3{grid-template-columns:1fr}}
.skip-link{position:fixed;top:10px;left:50%;z-index:300;transform:translateY(-220%);background:var(--color-accent);color:#fff;font-weight:900;padding:10px 22px;border:2px solid #fff;box-shadow:var(--shadow)}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:140;background:var(--color-bg-deep);border-bottom:2px solid var(--color-accent);box-shadow:0 10px 30px rgba(0,0,0,.22)}
.site-header__inner{max-width:1600px;margin:0 auto;display:grid;grid-template-columns:var(--header-rail-w) 1fr;background:var(--color-bg-deep)}
.brand{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:var(--header-h);padding:12px 8px;background:var(--color-panel);border-right:2px solid var(--border-strong);color:var(--color-text);text-decoration:none;position:relative}
.brand:hover{color:var(--color-text);background:var(--color-panel-2)}
.brand__glyph{display:grid;place-items:center;width:36px;height:36px;font-size:20px;line-height:1;color:var(--color-accent);border:2px solid var(--color-accent);box-shadow:0 0 18px rgba(var(--accent-rgb),.32);transition:transform .2s ease}
.brand:hover .brand__glyph{transform:rotate(90deg)}
.brand__word{writing-mode:vertical-rl;text-orientation:upright;font-size:22px;font-weight:900;letter-spacing:.22em;line-height:1.2;font-family:var(--font-head)}
.brand__code{font-size:10px;letter-spacing:.14em;color:var(--color-accent-alt);text-transform:uppercase;font-weight:300}
.site-header__command{position:relative;display:grid;grid-template-columns:1fr auto;grid-template-rows:34px 1fr;align-items:center;column-gap:16px;min-height:var(--header-h);padding:0 28px 14px;background:linear-gradient(90deg,rgba(var(--accent-alt-rgb),.1),transparent 42%)}
.site-header__status{grid-column:1;grid-row:1;display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-dim)}
.site-header__status-label{color:var(--color-text-dim)}
.site-header__status-label::before{content:"//";color:var(--color-accent);margin-right:6px;font-weight:900}
.site-header__status-sep{color:var(--color-accent)}
.site-header__status-value{color:var(--color-text);font-weight:700}
.site-header__controls{grid-column:2;grid-row:1;display:flex;align-items:center;justify-content:flex-end;gap:10px}
.theme-toggle{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1px solid var(--border-color);background:var(--color-panel);color:var(--color-text-dim);font-size:12px;letter-spacing:.08em;transition:border-color .18s ease,color .18s ease,box-shadow .18s ease}
.theme-toggle:hover{border-color:var(--color-accent);color:var(--color-text);box-shadow:0 4px 18px rgba(var(--accent-rgb),.16)}
.theme-toggle__mark{font-size:16px;line-height:1;color:var(--color-accent)}
.theme-toggle[aria-pressed="true"] .theme-toggle__mark{color:var(--color-warning)}
.theme-toggle__label{font-weight:700}
.nav-toggle{display:none;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--border-color);background:var(--color-panel);color:var(--color-text-dim);font-size:12px;letter-spacing:.08em}
.nav-toggle:hover{border-color:var(--color-accent);color:var(--color-text)}
.nav-toggle__box{position:relative;display:block;width:18px;height:14px}
.nav-toggle__line{position:absolute;left:0;width:100%;height:2px;background:currentColor;transition:transform .18s ease,top .18s ease}
.nav-toggle__line:nth-child(1){top:0}
.nav-toggle__line:nth-child(2){top:6px}
.nav-toggle__line:nth-child(3){top:12px}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1){top:6px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3){top:6px;transform:rotate(-45deg)}
.nav-toggle__text{font-weight:700}
.site-nav{grid-column:1/-1;grid-row:2;display:block}
.site-nav__list{display:flex;flex-wrap:wrap;gap:2px}
.site-nav__link{position:relative;display:inline-flex;align-items:center;gap:8px;padding:9px 14px 11px;color:var(--color-text-dim);font-weight:500;font-size:14px;letter-spacing:.05em;border-top:2px solid transparent;border-bottom:2px solid transparent;transition:background-color .18s ease,color .18s ease}
.site-nav__link:hover{color:var(--color-text);background:rgba(var(--accent-alt-rgb),.12)}
.site-nav__link[aria-current="page"]{color:var(--color-text);border-bottom-color:var(--color-accent);background:linear-gradient(180deg,transparent,rgba(var(--accent-rgb),.12))}
.site-nav__index{font-size:10px;font-weight:300;color:var(--color-accent-alt);letter-spacing:.1em}
.site-nav__label{font-weight:700}
.site-header__progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--border-color);overflow:hidden}
.site-header__progress-bar{display:block;width:0%;height:100%;background:linear-gradient(90deg,var(--color-accent-alt),var(--color-accent));transform-origin:left}
@media (max-width:959px){
  .site-header__inner{grid-template-columns:1fr auto;border-bottom:1px solid var(--border-color)}
  .brand{flex-direction:row;min-height:64px;padding:0 14px;border-right:1px solid var(--border-color);gap:8px}
  .brand__glyph{width:28px;height:28px;font-size:15px}
  .brand__word{writing-mode:horizontal-tb;font-size:18px;letter-spacing:.1em}
  .brand__code{display:none}
  .site-header__command{grid-template-columns:1fr auto;grid-template-rows:64px;padding:0 14px;min-height:64px}
  .site-header__status{display:none}
  .site-nav{display:none;position:fixed;top:64px;left:0;right:0;max-height:calc(100vh - 64px);overflow-y:auto;background:var(--color-bg-deep);border-top:1px solid var(--border-color);border-bottom:2px solid var(--color-accent);box-shadow:var(--shadow);padding:8px;z-index:150}
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;gap:2px}
  .site-nav__link{display:flex;width:100%;padding:14px 12px;border-bottom:1px solid var(--border-color)}
  .site-nav__link[aria-current="page"]{background:var(--color-panel)}
  .nav-toggle{display:inline-flex}
  .site-header__progress{position:absolute;bottom:-2px}
}
.site-footer{background:var(--color-bg-deep);color:var(--color-text-dim);border-top:3px solid var(--color-accent);position:relative}
.site-footer::before{content:"";display:block;height:4px;background:linear-gradient(90deg,var(--color-accent) 0 96px,transparent 96px 120px,var(--color-accent-alt) 120px 180px,transparent 180px)}
.site-footer__inner{max-width:var(--content-max);margin:0 auto;padding:56px 24px 32px;display:flex;flex-direction:column;gap:40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:32px}
.site-footer a{color:var(--color-text-dim)}
.site-footer a:hover{color:var(--color-text);text-decoration:underline;text-underline-offset:4px}
.footer-title{font-size:14px;font-weight:900;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text);padding-bottom:8px;margin-bottom:16px;border-bottom:1px solid var(--border-color)}
.footer-brand__logo{display:inline-flex;align-items:center;gap:10px;color:var(--color-text);text-decoration:none}
.footer-brand__logo:hover{text-decoration:none}
.footer-brand__badge{display:grid;place-items:center;width:40px;height:40px;font-size:20px;color:var(--color-accent);background:var(--color-panel);border:2px solid var(--color-accent);box-shadow:0 0 18px rgba(var(--accent-rgb),.22)}
.footer-brand__name{font-size:22px;font-weight:900;letter-spacing:.1em;color:var(--color-text)}
.footer-brand__statement{margin-top:16px;margin-bottom:10px;max-width:46ch;color:var(--color-text-dim)}
.footer-brand__license{font-size:12px;letter-spacing:.12em;color:var(--color-accent-alt);text-transform:uppercase}
.footer-nav__list li,.footer-legal__list li,.footer-contact li{padding:8px 0;border-bottom:1px dashed var(--border-color)}
.footer-nav__list a,.footer-legal__list a{display:inline-block;padding:2px 0}
.footer-contact__label{display:block;font-size:12px;letter-spacing:.12em;color:var(--color-text-dim);text-transform:uppercase;margin-bottom:2px}
.footer-contact__value{display:block;font-size:14px;color:var(--color-text)}
.footer-legal__icp{margin-top:14px;font-size:12px;letter-spacing:.06em;color:var(--color-text-dim)}
.site-footer__bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;margin-top:28px;padding-top:22px;border-top:1px solid var(--border-color);font-size:12px;color:var(--color-text-dim)}
.footer-domains{letter-spacing:.14em;text-transform:uppercase;color:var(--color-accent-alt)}
.footer-note{max-width:54ch}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 22px;border:2px solid var(--color-accent);color:var(--color-accent);font-weight:900;text-decoration:none;background:transparent;transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease}
.btn:hover{background:var(--color-accent);color:#fff;text-decoration:none;box-shadow:0 6px 24px rgba(var(--accent-rgb),.24)}
.btn--primary{background:var(--color-accent);color:#fff}
.btn--primary:hover{background:transparent;color:var(--color-accent)}
.btn--ghost{border-color:var(--color-accent-alt);color:var(--color-accent-alt)}
.btn--ghost:hover{background:var(--color-accent-alt);color:#fff;border-color:var(--color-accent-alt)}
.card{position:relative;background:var(--color-panel);border:2px solid var(--border-color);box-shadow:var(--shadow);padding:24px}
.card--cut{clip-path:var(--clip-cut)}
.card__title{font-size:20px;font-weight:900;line-height:1.3;color:var(--color-text);margin-bottom:8px}
.card__meta{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-accent-alt);margin-bottom:10px;font-weight:700}
.card__text{color:var(--color-text-dim)}
.prose{max-width:72ch}
.prose p{color:var(--color-text);margin-bottom:1em}
.prose h2,.prose h3{color:var(--color-text);font-weight:900;line-height:1.25;margin-top:1.6em;margin-bottom:.5em}
.prose a{text-decoration:underline;text-underline-offset:4px}
.breadcrumbs{display:flex;flex-wrap:wrap;padding:14px 0 8px}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs a{color:var(--color-text-dim)}
.breadcrumbs a:hover{color:var(--color-accent)}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--color-text-dim)}
.breadcrumbs li:not(:last-child)::after{content:"/";color:var(--color-accent);font-weight:900}
.breadcrumbs [aria-current="page"]{color:var(--color-text);font-weight:700}
.page-hero{padding-block:clamp(52px,8vw,102px);border-bottom:1px solid var(--border-color);background:linear-gradient(120deg,rgba(var(--accent-alt-rgb),.08),transparent 52%)}
.page-hero__annotation{display:block;font-size:14px;letter-spacing:.2em;color:var(--color-accent);margin-bottom:12px;font-weight:700}
.page-title{font-size:clamp(36px,6vw,72px);line-height:1.05;font-weight:900;letter-spacing:-.02em;color:var(--color-text);margin-bottom:12px}
.section-heading{font-size:clamp(30px,4.6vw,56px);line-height:1.12;font-weight:900;letter-spacing:-.01em;color:var(--color-text)}
.section-heading__annotation{display:block;font-size:14px;letter-spacing:.2em;color:var(--color-accent);margin-bottom:10px;font-weight:700;text-transform:uppercase}
.media-frame{position:relative;display:grid;place-items:center;aspect-ratio:16/9;overflow:hidden;border:2px solid var(--border-color);background:linear-gradient(135deg,rgba(var(--accent-alt-rgb),.18),transparent 42%),var(--color-panel);clip-path:var(--clip-cut);color:var(--color-text-dim);font-size:12px;letter-spacing:.18em;text-transform:uppercase}
.media-frame img,.media-frame video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:var(--color-panel);border:1px solid var(--border-color);color:var(--color-text-dim);font-size:12px;letter-spacing:.08em}
.tag--accent{border-color:rgba(var(--accent-rgb),.7);color:var(--color-accent)}
.tag--alt{border-color:rgba(var(--accent-alt-rgb),.7);color:var(--color-accent-alt)}
@media (max-width:1060px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr}
  .site-footer__inner{padding:40px 20px 24px}
  .site-footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .site-header__progress-bar{transition:none}
  .skip-link{transition:none}
}