/* =========================================================
   /assets/site.css — 共享样式
   夜间数字竞技场 · 框架式导航 · 非对称编辑部版式
   ========================================================= */

/* ---------- 1. RESET ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
::selection{background:rgba(47,243,208,.3);color:#F5F8FF}

/* ---------- 2. TOKENS ---------- */
:root{
  --ink-900:#060B1A;
  --ink-800:#0B1730;
  --ink-700:#16264A;
  --cyan-400:#2FF3D0;
  --orange-500:#FF8A3D;
  --violet-500:#7B5BFF;
  --frost-100:#F5F8FF;
  --slate-300:#C6D2E6;
  --slate-500:#8A9AB8;
  --green-400:#35D07F;
  --red-400:#FF5D5D;

  --bg:var(--ink-900);
  --panel:var(--ink-800);
  --line:var(--ink-700);
  --text:var(--slate-300);
  --text-strong:var(--frost-100);
  --text-muted:var(--slate-500);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --radius-xl:34px;
  --radius-lg:26px;
  --radius-md:20px;
  --radius-sm:14px;
  --radius-pill:999px;

  --edge:clamp(0px,2.2vw,26px);
  --gutter:clamp(16px,3.2vw,40px);
  --header-h:clamp(62px,13vw,78px);
  --maxw:1220px;

  --shadow-soft:0 28px 64px -38px rgba(0,0,0,.95);
  --glow-cyan:0 0 0 1px rgba(47,243,208,.3),0 20px 54px -28px rgba(47,243,208,.45);
}

/* ---------- 3. BASE / 中文排版 ---------- */
body{
  min-height:100%;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 84% -10%, rgba(123,91,255,.22), transparent 60%),
    radial-gradient(900px 540px at -8% 6%, rgba(47,243,208,.10), transparent 58%),
    radial-gradient(780px 540px at 58% 112%, rgba(255,138,61,.09), transparent 62%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
/* 贯穿全屏的左右框架发丝线 */
body::before,
body::after{
  content:"";
  position:fixed;top:0;bottom:0;width:1px;z-index:90;
  pointer-events:none;
  background:linear-gradient(180deg,
    rgba(47,243,208,.35),
    rgba(22,38,74,.6) 22%,
    rgba(22,38,74,.6) 78%,
    rgba(123,91,255,.35));
}
body::before{left:var(--edge)}
body::after{right:var(--edge)}

h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--text-strong);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.02em;
}
.display-1{font-size:clamp(34px,6.4vw,56px);font-weight:900;letter-spacing:-.03em;line-height:1.1}
.display-2{font-size:clamp(26px,4vw,40px);font-weight:900}
.display-3{font-size:clamp(21px,2.6vw,28px)}
p{max-width:52em}
strong{color:var(--text-strong);font-weight:700}
a:hover{color:var(--cyan-400)}

.mono{font-family:var(--font-mono);font-size:.82em;letter-spacing:.08em}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 4. 容器与网格 ---------- */
.container{
  width:min(100%, calc(var(--maxw) + 2 * var(--edge) + 2 * var(--gutter)));
  margin-inline:auto;
  padding-inline:calc(var(--edge) + var(--gutter));
}
.section{padding-block:clamp(48px,7vw,92px)}
.section--tight{padding-block:clamp(28px,4.4vw,56px)}
.grid{display:grid;gap:var(--gap,clamp(16px,2.4vw,28px))}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,258px),1fr))}
.grid--sidebar{grid-template-columns:minmax(0,1fr) minmax(220px,300px)}
@media (max-width:900px){
  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:clamp(14px,2.4vw,32px);margin-bottom:clamp(20px,3vw,38px)}
.section-head > *{flex:1 1 260px}

/* ---------- 5. 文字组件 ---------- */
.lede{font-size:clamp(16px,1.6vw,18px);color:var(--slate-300);max-width:42em}
.prose{max-width:42em}
.prose p{margin-bottom:1.15em}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.6em}
.prose ul{list-style:none;margin-bottom:1.15em}
.prose li{position:relative;padding-left:1.4em;margin-bottom:.55em}
.prose li::before{content:"";position:absolute;left:0;top:.8em;width:9px;height:1px;background:var(--cyan-400)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan-400);
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--cyan-400))}
.index-chip{
  display:inline-flex;align-items:center;gap:.42em;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  padding:.32em .85em;border-radius:var(--radius-pill);
  color:var(--cyan-400);background:rgba(47,243,208,.08);
  border:1px solid rgba(47,243,208,.3);white-space:nowrap;
}
.index-chip--warm{color:var(--orange-500);background:rgba(255,138,61,.09);border-color:rgba(255,138,61,.3)}
.index-chip--violet{color:#B7A6FF;background:rgba(123,91,255,.12);border-color:rgba(123,91,255,.36)}
.index-chip--ok{color:var(--green-400);background:rgba(53,208,127,.1);border-color:rgba(53,208,127,.32)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.82em 1.4em;border-radius:var(--radius-pill);
  font-family:var(--font-body);font-size:15px;font-weight:600;line-height:1;
  letter-spacing:.01em;border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,border-color .22s ease,color .22s ease;
}
.btn--primary{
  background:linear-gradient(135deg,#FFA45C,var(--orange-500) 55%,#F06A21);
  color:#1A0A01;
  box-shadow:0 16px 38px -20px rgba(255,138,61,.85);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 20px 46px -20px rgba(255,138,61,.95);color:#1A0A01}
.btn--ghost{
  background:rgba(11,23,48,.7);border-color:var(--line);color:var(--slate-300);
}
.btn--ghost:hover{border-color:rgba(47,243,208,.5);color:var(--frost-100);transform:translateY(-2px)}

/* ---------- 7. 卡片 ---------- */
.card{
  position:relative;
  background:linear-gradient(180deg,rgba(11,23,48,.94),rgba(6,11,26,.88));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.6vw,30px);
  box-shadow:var(--shadow-soft);
}
.card--accent{border-color:rgba(47,243,208,.3);box-shadow:var(--glow-cyan)}
.card--warm{border-color:rgba(255,138,61,.3)}

/* ---------- 8. 图片容器（页面阶段复用） ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  width:100%;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:
    radial-gradient(120% 120% at 12% 0%, rgba(123,91,255,.24), transparent 58%),
    radial-gradient(120% 120% at 100% 100%, rgba(47,243,208,.14), transparent 60%),
    linear-gradient(160deg,var(--ink-800),var(--ink-900));
}
.media__img{width:100%;height:100%;object-fit:cover}
.media--21x9{aspect-ratio:21/9}
.media--16x9{aspect-ratio:16/9}
.media--3x2{aspect-ratio:3/2}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media__label{
  position:absolute;left:14px;bottom:14px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--frost-100);background:rgba(6,11,26,.74);
  border:1px solid rgba(47,243,208,.3);border-radius:var(--radius-pill);
  padding:.3em .8em;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.09em;
  color:var(--text-muted);padding-top:clamp(18px,3vw,34px);
}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.55em}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:.55em}
.breadcrumbs__link{color:var(--slate-300)}
.breadcrumbs__link:hover{color:var(--cyan-400)}
.breadcrumbs__sep{color:var(--ink-700);font-size:11px}

/* ---------- 10. 动效 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.22,.72,.3,1);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. 页头（框架式导航） ---------- */
.skip-link{
  position:fixed;left:calc(var(--edge) + 14px);top:14px;z-index:120;
  transform:translateY(-180%);
  padding:.72em 1.15em;border-radius:var(--radius-pill);
  background:var(--cyan-400);color:#04121A;font-weight:700;font-size:14px;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(6,11,26,.94),rgba(6,11,26,.76));
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(22,38,74,.9);
  transition:background-color .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header[data-scrolled="true"]{
  background:linear-gradient(180deg,rgba(6,11,26,.99),rgba(6,11,26,.9));
  border-bottom-color:rgba(47,243,208,.3);
  box-shadow:0 22px 44px -34px rgba(47,243,208,.7);
}
.site-header__frame{position:absolute;inset:0;display:block;pointer-events:none}
.site-header__frame::before{
  content:"";position:absolute;left:0;right:0;top:0;height:6px;
  background-image:repeating-linear-gradient(90deg,rgba(198,210,230,.24) 0 1px,transparent 1px 26px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.site-header__frame::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,243,208,.5),rgba(123,91,255,.5),transparent);
}
.site-header__bar{position:relative}
.site-header__inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,26px);
  min-height:var(--header-h);
  width:min(100%, calc(var(--maxw) + 2 * var(--edge) + 2 * var(--gutter)));
  margin-inline:auto;
  padding-inline:calc(var(--edge) + var(--gutter));
}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  position:relative;width:36px;height:36px;flex:0 0 auto;
  display:grid;place-items:center;border-radius:13px;
  border:1px solid rgba(47,243,208,.45);
  background:linear-gradient(140deg,rgba(47,243,208,.24),rgba(123,91,255,.3));
}
.brand__mark-core{
  width:10px;height:10px;border-radius:3px;background:var(--cyan-400);
  transform:rotate(45deg);box-shadow:0 0 15px rgba(47,243,208,.95);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:16px;color:var(--frost-100);letter-spacing:.01em}
.brand__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.15em;color:var(--cyan-400)}

.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{
  display:flex;align-items:center;gap:clamp(2px,.9vw,12px);
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.site-nav__list::-webkit-scrollbar{display:none}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:.45em;
  padding:.52em .78em;border-radius:var(--radius-pill);
  border:1px solid transparent;white-space:nowrap;
  font-size:15px;font-weight:500;color:var(--slate-300);
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.site-nav__index{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--slate-500);transition:color .2s ease}
.site-nav__link:hover{color:var(--frost-100);background:rgba(47,243,208,.07);border-color:rgba(47,243,208,.22)}
.site-nav__link:hover .site-nav__index{color:var(--cyan-400)}
.site-nav__link[aria-current="page"]{color:#04121A;background:var(--cyan-400);border-color:var(--cyan-400);font-weight:700}
.site-nav__link[aria-current="page"] .site-nav__index{color:rgba(4,18,26,.7)}
.site-nav__note{
  display:none;margin-top:16px;max-width:none;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--text-muted);
}
.site-nav__actions{display:none}

.site-header__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}

.nav-toggle{
  display:none;align-items:center;gap:.55em;
  padding:.6em .95em;border-radius:var(--radius-pill);
  background:rgba(11,23,48,.8);border:1px solid var(--line);
  color:var(--frost-100);font-size:14px;font-weight:600;line-height:1;cursor:pointer;
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:rgba(47,243,208,.45)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .25s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;z-index:2;
  background:rgba(22,38,74,.6);overflow:hidden;
}
.scroll-progress__bar{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,var(--cyan-400),var(--violet-500) 55%,var(--orange-500));
  transition:width .12s linear;
}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,110px);
  background:linear-gradient(180deg,rgba(11,23,48,.5),rgba(6,11,26,.99) 58%);
  border-top:1px solid rgba(22,38,74,.95);
}
.site-footer__frame{
  position:absolute;left:0;right:0;top:0;height:8px;display:block;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(47,243,208,.4) 0 1px,transparent 1px 34px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);
}
.site-footer__inner{
  display:grid;gap:clamp(24px,3.4vw,46px);
  padding-block:clamp(38px,6vw,72px) clamp(22px,3vw,34px);
  grid-template-columns:minmax(200px,1.05fr) minmax(0,1.9fr) minmax(230px,1.1fr);
}

.footer-brand{display:flex;flex-direction:column;gap:10px}
.footer-brand__name{font-family:var(--font-display);font-weight:900;font-size:20px;color:var(--frost-100);letter-spacing:-.01em}
.footer-brand__tagline{font-size:15px;color:var(--cyan-400);max-width:20em}
.footer-brand__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--text-muted);max-width:24em}

.footer-nav{display:grid;gap:clamp(18px,2.6vw,32px);grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;color:var(--slate-500);margin-bottom:14px;
}
.footer-col__list{display:flex;flex-direction:column;gap:2px}
.footer-col__link{
  display:inline-flex;align-items:baseline;gap:.7em;
  padding:.32em 0;font-size:15px;color:var(--slate-300);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-col__index{font-family:var(--font-mono);font-size:11px;color:var(--ink-700)}
.footer-col__link:hover{color:var(--cyan-400);border-bottom-color:rgba(47,243,208,.35)}
.footer-col__link:hover .footer-col__index{color:var(--cyan-400)}
.footer-col__link[aria-current="page"]{color:var(--cyan-400);font-weight:600}
.footer-col__link[aria-current="page"] .footer-col__index{color:var(--cyan-400)}

.footer-contact{min-width:0}
.contact-list{display:flex;flex-direction:column;gap:12px}
.contact-item{
  display:grid;grid-template-columns:74px minmax(0,1fr) auto;
  align-items:center;gap:10px;
  padding:.6em .8em;border-radius:var(--radius-sm);
  background:rgba(11,23,48,.72);border:1px solid var(--line);
}
.contact-item__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--slate-500)}
.contact-item__value{font-size:14px;color:var(--frost-100);overflow-wrap:anywhere;line-height:1.5}
.contact-item__copy{
  padding:.4em .8em;border-radius:var(--radius-pill);
  border:1px solid rgba(47,243,208,.32);color:var(--cyan-400);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.contact-item__copy:hover{background:rgba(47,243,208,.12)}
.contact-item__copy[data-copied="true"]{background:var(--cyan-400);color:#04121A;border-color:var(--cyan-400)}
.footer-contact__hours{margin-top:14px;font-size:13px;color:var(--text-muted);max-width:30em;line-height:1.7}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:.6em 1.6em;
  padding-bottom:clamp(26px,4vw,44px);
  border-top:1px solid rgba(22,38,74,.9);
  padding-top:clamp(18px,2.6vw,26px);
}
.footer-legal,.footer-update,.footer-copy{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--text-muted);max-width:none;
}
.footer-legal{color:var(--slate-300)}
.footer-update{flex:1 1 260px}
.footer-copy{margin-left:auto;color:var(--slate-500)}

.to-top{
  position:fixed;right:calc(var(--edge) + 16px);bottom:calc(var(--edge) + 16px);z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(11,23,48,.94);border:1px solid rgba(47,243,208,.35);
  color:var(--cyan-400);font-size:17px;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,border-color .25s ease;
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--cyan-400);background:rgba(47,243,208,.12)}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1079px){
  .nav-toggle{display:inline-flex}
  .site-header__actions .btn--ghost{display:none}
  .site-nav{
    position:fixed;left:0;right:0;top:var(--header-h);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:20px calc(var(--edge) + var(--gutter)) 28px;
    background:linear-gradient(180deg,rgba(6,11,26,.99),rgba(11,23,48,.97));
    border-bottom:1px solid rgba(47,243,208,.3);
    box-shadow:0 46px 78px -44px rgba(0,0,0,.96);
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .26s ease,transform .26s ease,visibility .26s ease;
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:6px;overflow:visible}
  .site-nav__item{flex:1 1 auto}
  .site-nav__link{
    justify-content:flex-start;padding:.85em 1em;
    border-radius:var(--radius-md);background:rgba(11,23,48,.6);
    border-color:transparent;font-size:16px;
  }
  .site-nav__note{display:block}
  .site-nav__actions{display:grid;gap:10px;margin-top:16px}
}
@media (max-width:1023px){
  .site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
  .footer-nav{grid-column:1/-1;order:3}
  .footer-contact{grid-column:2/3;order:2}
}
@media (max-width:719px){
  .site-header__actions .btn{display:none}
  .brand__meta{display:none}
}
@media (max-width:639px){
  .site-footer__inner{grid-template-columns:minmax(0,1fr)}
  .footer-brand,.footer-nav,.footer-contact{grid-column:1/-1}
  .footer-copy{margin-left:0}
  .contact-item{grid-template-columns:minmax(0,1fr) auto;row-gap:6px}
  .contact-item__label{grid-column:1/-1}
}

/* ---------- 14. 可访问性 ---------- */
:focus-visible{outline:2px solid var(--cyan-400);outline-offset:3px;border-radius:6px}
.skip-link:focus-visible{outline-offset:2px}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    transition-delay:0ms!important;
  }
  [data-reveal]{opacity:1!important;transform:none!important}
  .scroll-progress__bar{transition:none!important}
}