/* =========================================================
   /assets/site.css — 安博电竞站 共享样式
   01 变量与 reset  02 排版  03 外壳框架  04 页脚
   05 通用组件     06 响应式  07 动效降级
   ========================================================= */

/* ---------- 01. 变量与 reset ---------- */
:root{
  --ink:#070B12;
  --ink-2:#0C1424;
  --card:#12202E;
  --cyan:#00E5FF;
  --mint:#38F2C4;
  --flame:#FF4D3D;
  --violet:#6C5CE7;
  --azure:#2D9CFF;
  --haze:#A7B0C0;
  --white:#F3F7FF;
  --text:#E8F0FF;

  --line:rgba(0,229,255,.16);
  --line-soft:rgba(167,176,192,.16);

  --rail-w:132px;
  --topbar-h:58px;
  --gutter:clamp(18px,3.2vw,48px);
  --radius:3px;
  --ease:cubic-bezier(.22,.61,.36,1);

  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:calc(var(--topbar-h) + 16px);
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
a{color:inherit;text-decoration:none}

body{
  min-height:100vh;
  padding-top:var(--topbar-h);
  padding-left:var(--rail-w);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 88% -8%,rgba(45,156,255,.18),transparent 60%),
    radial-gradient(820px 520px at 2% 2%,rgba(108,92,231,.16),transparent 62%),
    radial-gradient(900px 700px at 62% 115%,rgba(0,229,255,.10),transparent 62%),
    repeating-linear-gradient(90deg,rgba(0,229,255,.035) 0 1px,transparent 1px 96px),
    linear-gradient(180deg,#070B12,#080D16 58%,#070B12);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#main-content{position:relative;z-index:1;display:block;scroll-margin-top:calc(var(--topbar-h) + 16px)}

::selection{background:rgba(0,229,255,.28);color:var(--white)}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 02. 排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  color:var(--white);
  line-height:1.12;
  letter-spacing:-.03em;
}
h1{font-size:clamp(44px,7vw,96px)}
h2{font-size:clamp(28px,4vw,40px)}
h3{font-size:clamp(20px,2.4vw,26px);letter-spacing:-.02em}
h4{font-size:clamp(17px,1.6vw,20px);letter-spacing:-.01em}

p{font-size:clamp(15px,1.05vw,17px);line-height:1.8;color:var(--text)}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.08em;
}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 03. 外壳框架 ---------- */
.frameset{
  position:fixed;
  inset:0;
  z-index:90;
  pointer-events:none;
}
.frameset > *{pointer-events:auto}

.frameset::after{
  content:"";
  position:fixed;
  top:0;right:0;bottom:0;
  width:1px;
  background:linear-gradient(180deg,rgba(0,229,255,.34),rgba(0,229,255,.05) 42%,transparent);
}

/* 跳转链接 */
.skip-link{
  position:fixed;
  top:10px;left:12px;
  z-index:120;
  padding:10px 16px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:#04121A;
  background:var(--cyan);
  border-radius:2px;
  transform:translateY(-220%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* 左侧框架栏 */
.rail{
  position:absolute;
  top:0;left:0;bottom:0;
  z-index:3;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:stretch;
  gap:14px;
  padding:0 10px 18px;
  background:linear-gradient(180deg,#0A111D 0%,#070B12 52%,#080D16 100%);
  border-right:1px solid var(--line);
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:thin;
}

.rail__brand{
  flex:0 0 auto;
  height:var(--topbar-h);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease);
}
.rail__brand:hover{background:rgba(0,229,255,.07)}

.brand-mark{
  display:grid;
  place-items:center;
  width:30px;height:30px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:18px;
  line-height:1;
  color:var(--cyan);
  border:1px solid rgba(0,229,255,.5);
  border-radius:2px;
  box-shadow:inset 0 0 14px rgba(0,229,255,.2);
}
.brand-stamp{
  font-size:9px;
  letter-spacing:.24em;
  color:var(--haze);
}

.rail__word{
  align-self:center;
  writing-mode:vertical-rl;
  text-orientation:mixed;
  padding:8px 0;
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:.34em;
  color:var(--white);
  opacity:.9;
}

.rail__nav{flex:1 1 auto;min-height:0}
.rail__list{display:flex;flex-direction:column;gap:2px}

.rail__link{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:8px;
  color:var(--haze);
  border-left:2px solid transparent;
  border-radius:0 2px 2px 0;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.rail__index{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.2em;
  color:rgba(0,229,255,.55);
  transition:color .22s var(--ease);
}
.rail__label{
  font-size:13.5px;
  font-weight:600;
  line-height:1.3;
  letter-spacing:.02em;
}
.rail__link:hover{
  color:var(--white);
  background:rgba(0,229,255,.07);
  border-left-color:rgba(0,229,255,.6);
  transform:translateX(2px);
}
.rail__link:hover .rail__index{color:var(--cyan)}
.rail__link[aria-current="page"]{
  color:var(--white);
  background:linear-gradient(90deg,rgba(0,229,255,.17),rgba(0,229,255,0) 92%);
  border-left-color:var(--cyan);
}
.rail__link[aria-current="page"] .rail__index{color:var(--cyan)}
.rail__link[aria-current="page"] .rail__label{color:var(--white)}

.rail__foot{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
}
.rail__foot::before{
  content:"";
  width:24px;height:3px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--violet),var(--azure),var(--cyan));
}
.rail__note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--haze);
  opacity:.72;
}

/* 顶部状态带 */
.topbar{
  position:absolute;
  top:0;left:var(--rail-w);right:0;
  height:var(--topbar-h);
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:0 var(--gutter);
  background:rgba(7,11,18,.84);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px) saturate(140%);
  backdrop-filter:blur(12px) saturate(140%);
}

.topbar__status{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--white);
  white-space:nowrap;
}

.status-dot{
  flex:0 0 auto;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(56,242,196,.18),0 0 12px rgba(56,242,196,.8);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.5;transform:scale(.82)}
}

.topbar__meta{
  font-size:10px;
  letter-spacing:.22em;
  padding:3px 7px;
  color:#FFD9D4;
  border:1px solid rgba(255,77,61,.42);
  border-radius:2px;
  background:rgba(255,77,61,.12);
}

.topbar__actions{display:flex;align-items:center;gap:10px}

.topbar__track{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  overflow:hidden;
  background:rgba(167,176,192,.12);
}
.topbar__fill{
  display:block;
  width:100%;height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--violet),var(--azure) 42%,var(--cyan) 78%,var(--mint));
  transition:transform .12s linear;
}

/* 移动抽屉按钮与遮罩 */
.nav-toggle{
  display:none;
  position:absolute;
  top:0;right:0;
  z-index:4;
  width:var(--topbar-h);
  height:var(--topbar-h);
  place-content:center;
  gap:5px;
  border-left:1px solid var(--line);
  cursor:pointer;
}
.nav-toggle__bar{
  display:block;
  width:20px;height:2px;
  background:var(--white);
  transition:transform .26s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.scrim{display:none}

/* ---------- 04. 页脚 ---------- */
.site-foot{
  position:relative;
  z-index:1;
  margin-top:clamp(40px,7vw,96px);
  padding-top:clamp(34px,5vw,64px);
  background:linear-gradient(180deg,#070B12 0%,#0A1220 58%,#0C1424 100%);
  border-top:1px solid var(--line);
}
.site-foot::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--violet),var(--azure) 38%,var(--cyan) 72%,transparent);
}

.foot__top{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(24px,4vw,64px);
  padding-bottom:clamp(26px,3.6vw,46px);
}

.foot__brand{display:flex;flex-direction:column;gap:14px;min-width:0}

.foot__line{
  max-width:24ch;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(20px,2.3vw,30px);
  line-height:1.3;
  letter-spacing:-.02em;
  color:var(--white);
}

.foot__contact{
  display:grid;
  gap:7px;
  margin-top:4px;
  padding-top:16px;
  border-top:1px dashed var(--line-soft);
}
.contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
  font-size:14px;
  line-height:1.6;
}
.contact-line__key{
  flex:0 0 auto;
  min-width:62px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:rgba(0,229,255,.82);
}
.contact-line__val{color:#DCE6F5;word-break:break-all}

.foot__note{
  max-width:48ch;
  font-size:12.5px;
  line-height:1.7;
  color:var(--haze);
}

.foot__grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
  align-content:start;
}
.foot__col{display:flex;flex-direction:column;min-width:0}
.foot__col-title{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--haze);
}
.foot__list{display:grid;gap:9px}

.foot__link{
  position:relative;
  display:inline-block;
  font-size:14.5px;
  color:#CBD6E6;
  transition:color .22s var(--ease);
}
.foot__link::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:100%;height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .26s var(--ease);
}
.foot__link:hover{color:var(--white)}
.foot__link:hover::after,
.foot__link:focus-visible::after{transform:scaleX(1)}

.foot__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px 22px;
  padding-block:16px 20px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;
  color:var(--haze);
}
.foot__icp{font-size:11.5px;letter-spacing:.08em;color:var(--haze)}
.foot__legal{display:flex;flex-wrap:wrap;gap:16px}

.legal-link{
  font-size:12.5px;
  color:var(--haze);
  border-bottom:1px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.legal-link:hover{color:var(--cyan);border-bottom-color:rgba(0,229,255,.5)}

.foot__copy{margin-left:auto;font-size:12px;color:var(--haze)}

.to-top{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 12px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--white);
  border:1px solid rgba(0,229,255,.28);
  border-radius:2px;
  cursor:pointer;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.to-top:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  background:rgba(0,229,255,.1);
}
.to-top__arrow{font-family:var(--font-mono);font-size:13px;line-height:1}

/* ---------- 05. 通用组件 ---------- */
.container{
  width:100%;
  max-width:1320px;
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(38px,6vw,86px)}
.section + .section{border-top:1px solid var(--line-soft)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:9px 16px;
  font-family:var(--font-body);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn--ghost{
  color:var(--haze);
  border-color:rgba(0,229,255,.26);
  background:rgba(0,229,255,.05);
}
.btn--ghost:hover{
  color:var(--white);
  border-color:var(--cyan);
  box-shadow:0 0 0 1px rgba(0,229,255,.28),0 0 18px rgba(0,229,255,.18);
}
.btn--primary{
  color:#04121A;
  font-weight:700;
  background:linear-gradient(100deg,var(--cyan),var(--mint));
}
.btn--primary:hover{
  transform:translateY(-1px);
  box-shadow:0 8px 24px -10px rgba(0,229,255,.75);
}
.btn--sm{padding:6px 12px;font-size:12px;letter-spacing:.06em}

.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--index{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.grid--split{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}

.panel{
  position:relative;
  padding:clamp(16px,2vw,24px);
  background:linear-gradient(180deg,rgba(18,32,46,.92),rgba(12,20,36,.92));
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.panel:hover{
  border-color:rgba(0,229,255,.42);
  box-shadow:0 0 0 1px rgba(0,229,255,.12),0 20px 44px -26px rgba(0,229,255,.55);
  transform:translateY(-2px);
}
.panel::after{
  content:"";
  position:absolute;
  right:0;bottom:0;
  width:44px;height:2px;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  opacity:.6;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  white-space:nowrap;
  color:var(--cyan);
  border:1px solid rgba(0,229,255,.4);
  border-radius:2px;
  background:rgba(0,229,255,.07);
}
.tag--hot{
  color:#FFD9D4;
  border-color:rgba(255,77,61,.5);
  background:rgba(255,77,61,.13);
}
.tag--mint{
  color:var(--mint);
  border-color:rgba(56,242,196,.45);
  background:rgba(56,242,196,.09);
}

.breadcrumb{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--haze);
}
.breadcrumb > ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:rgba(167,176,192,.45)}
.breadcrumb a{color:var(--haze);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--white)}

.prose{max-width:70ch;color:var(--text)}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:1.8em;font-size:clamp(24px,3vw,32px)}
.prose h3{margin-top:1.5em}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(0,229,255,.35);
  transition:border-color .2s var(--ease);
}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose strong{color:var(--white);font-weight:700}
.prose ul{display:grid;gap:.5em;padding-left:1.1em;list-style:square;color:var(--haze)}
.prose li{padding-left:.2em}

.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/10;
  overflow:hidden;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 100% at 8% 0%,rgba(108,92,231,.36),transparent 62%),
    radial-gradient(90% 90% at 92% 100%,rgba(0,229,255,.26),transparent 58%),
    linear-gradient(160deg,#0C1424,#12202E);
}
.media-frame > img,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}

/* ---------- 06. 响应式 ---------- */
@media (max-width:1024px){
  :root{--rail-w:0px}

  body{padding-left:0}

  .rail{
    width:min(84vw,320px);
    padding:0 14px 22px;
    transform:translateX(-104%);
    transition:transform .34s var(--ease);
    box-shadow:24px 0 60px rgba(0,0,0,.62);
  }
  .frameset[data-open="true"] .rail{transform:translateX(0)}

  .rail__link{padding:12px 10px}
  .rail__label{font-size:15px}
  .rail__index{font-size:10px}
  .rail__word{font-size:16px}

  .topbar{
    left:0;
    padding-right:calc(var(--topbar-h) + 10px);
    gap:10px;
  }

  .nav-toggle{display:grid}

  .frameset[data-open="true"] .scrim{
    display:block;
    position:fixed;
    inset:0;
    z-index:1;
    background:rgba(3,6,12,.74);
    -webkit-backdrop-filter:blur(3px);
    backdrop-filter:blur(3px);
  }

  .topbar__actions .btn--ghost{display:none}

  .foot__top{grid-template-columns:1fr}
  .foot__copy{margin-left:0}
}

@media (max-width:820px){
  .grid--split{grid-template-columns:1fr}
  .foot__bottom{gap:12px 18px}
  .to-top{margin-left:auto}
}

@media (max-width:640px){
  .topbar__meta{display:none}
  .topbar__status{font-size:10.5px;letter-spacing:.1em}
  .topbar__actions .btn--primary{padding:8px 12px;font-size:12px}
  .foot__grid{grid-template-columns:1fr;gap:18px}
  .contact-line__key{min-width:56px}
  .site-foot .container{padding-inline:var(--gutter)}
}

/* ---------- 07. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto !important}
  .panel:hover{transform:none}
  .btn--primary:hover{transform:none}
}