/* =====================================================================
   威客电竞主站 · 共享样式表 /assets/site.css
   DNA：目录型内容地图 · 左右分置导航 · 编号章节 · 暗场高饱和点缀
   ===================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#05070C;
  --panel:#0B111B;
  --panel-2:#0D1420;
  --line:#1C2839;
  --line-soft:rgba(28,40,57,.65);
  --blue:#2F7BFF;
  --cyan:#23E6D0;
  --amber:#FFA62B;
  --magenta:#FF3D7F;
  --text:#E8EEF7;
  --text-soft:#C3CEDE;
  --muted:#8B99AD;
  --zebra:#16263A;
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --pill:999px;
  --font-cn:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --dur:.24s;
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1180px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:64px;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:140px;
}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,address,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
address{font-style:normal}
hr{border:0;border-top:1px solid var(--line)}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 88% -12%, rgba(47,123,255,.16), transparent 70%),
    radial-gradient(720px 460px at -12% 18%, rgba(35,230,208,.08), transparent 72%);
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-cn);
  font-size:15.5px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

.display{
  font-weight:300;
  font-size:clamp(40px,6.5vw,92px);
  line-height:1.05;
  letter-spacing:.01em;
  color:var(--text);
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.index-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--muted);
}
.status-key{font-weight:900;letter-spacing:-.02em;color:var(--text)}
.lead{
  font-size:clamp(16px,1.6vw,19px);
  font-weight:300;
  line-height:1.7;
  color:var(--text-soft);
  max-width:34em;
}
.prose{max-width:38em;color:var(--text-soft)}
.prose p + p{margin-top:14px}
.prose strong{color:var(--text)}
.link{
  color:var(--text-soft);
  border-bottom:1px solid rgba(35,230,208,.35);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ---------- 4. 布局骨架 ---------- */
.container{
  width:min(100% - (var(--gutter) * 2), var(--container));
  margin-inline:auto;
}
.section{padding-block:clamp(40px,6vw,76px)}
.stack > * + *{margin-top:16px}
.grid{display:grid;gap:18px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;align-items:start}

/* ---------- 5. 组件 ---------- */
.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px 22px 20px;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.card:hover{border-color:#2C4059;background:var(--panel-2)}
.card__title{font-size:18px;font-weight:700;letter-spacing:-.01em;line-height:1.4}
.card__meta{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:clamp(20px,3vw,30px);
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:10px 18px;
  padding-bottom:16px;
  margin-bottom:26px;
  border-bottom:1px solid var(--line);
}
.section-head__title{font-size:clamp(22px,3vw,34px);font-weight:700;letter-spacing:-.01em;line-height:1.2}
.section-head__note{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:var(--pill);
  border:1px solid currentColor;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  line-height:1.6;
}
.tag--blue{color:#7FAEFF;background:rgba(47,123,255,.14);border-color:rgba(47,123,255,.45)}
.tag--cyan{color:var(--cyan);background:rgba(35,230,208,.12);border-color:rgba(35,230,208,.4)}
.tag--amber{color:var(--amber);background:rgba(255,166,43,.13);border-color:rgba(255,166,43,.42)}
.tag--magenta{color:var(--magenta);background:rgba(255,61,127,.13);border-color:rgba(255,61,127,.45)}

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text);
  font-size:14px;
  line-height:1.4;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-1px);border-color:#2C4059}
.btn--primary{background:var(--blue);border-color:transparent;color:#04070E;font-weight:700}
.btn--primary:hover{background:#4A8DFF}
.btn--ghost{background:transparent;border-color:rgba(47,123,255,.55);color:#7FAEFF}
.btn--ghost:hover{border-color:var(--blue);color:var(--text);background:rgba(47,123,255,.12)}
.btn--quiet{background:transparent;border-color:transparent;color:var(--muted)}
.btn--quiet:hover{color:var(--cyan)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 18px;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:rgba(11,17,27,.85);
  color:var(--muted);
  font-size:13.5px;
  line-height:1.4;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.chip:hover{color:var(--text);border-color:#2C4059}
.chip[aria-pressed="true"]{background:var(--blue);border-color:var(--blue);color:#04070E;font-weight:700}
.chip--active{background:var(--blue);border-color:var(--blue);color:#04070E;font-weight:700}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb__sep{color:#33455C}

.img-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:
    linear-gradient(140deg,#0B111B 0%,#16263A 58%,#0B111B 100%);
}
.img-frame img{width:100%;height:100%;object-fit:cover}
.img-frame--wide{aspect-ratio:21 / 9}
.img-frame--tall{aspect-ratio:3 / 4}
.img-frame--square{aspect-ratio:1 / 1}
.img-frame__cap{
  position:absolute;
  left:12px;
  right:12px;
  bottom:12px;
  width:max-content;
  max-width:calc(100% - 24px);
  padding:4px 12px;
  border-radius:var(--pill);
  background:rgba(5,7,12,.76);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
}

.toc{
  position:sticky;
  top:132px;
  padding-left:14px;
  border-left:2px solid var(--line);
}
.toc__title{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted);
}
.toc__link{
  display:flex;
  gap:10px;
  margin-left:-16px;
  padding:7px 0 7px 14px;
  border-left:2px solid transparent;
  color:var(--muted);
  font-size:13.5px;
  line-height:1.5;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc__link:hover{color:var(--text)}
.toc__link[data-active="true"]{color:var(--text);border-left-color:var(--cyan)}
.toc__index{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:#5C6A80}

.timeline{position:relative;padding-left:22px;border-left:1px dashed rgba(35,230,208,.35)}
.timeline__item{position:relative;padding:0 0 22px 10px}
.timeline__item::before{
  content:"";
  position:absolute;
  left:-28px;
  top:9px;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 4px rgba(35,230,208,.14);
}
.timeline__label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
}

.stat{display:grid;gap:4px}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(24px,3.4vw,38px);
  font-weight:700;
  line-height:1;
  color:var(--cyan);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 6. 头部 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-70px;
  z-index:120;
  padding:10px 18px;
  border-radius:var(--pill);
  background:var(--cyan);
  color:#04070E;
  font-weight:700;
  font-size:14px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.scroll-progress{
  position:fixed;
  inset:0 0 auto 0;
  height:2px;
  z-index:110;
  pointer-events:none;
  background:transparent;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
  transition:width .08s linear;
}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(5,7,12,.88);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled="true"]{box-shadow:0 14px 34px rgba(0,0,0,.5)}

.header-top__inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:var(--header-h);
}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  color:#04070E;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__name{font-size:15px;font-weight:700;letter-spacing:.02em}
.brand__domain{font-size:11px;letter-spacing:.1em;color:var(--muted)}

.nav{margin-left:auto}
.nav__list{display:flex;align-items:center;gap:4px}
.nav__item{flex:0 0 auto}
.nav__link{
  display:inline-flex;
  align-items:center;
  padding:9px 14px;
  border-radius:var(--pill);
  color:var(--muted);
  font-size:14px;
  line-height:1.4;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav__link:hover{color:var(--text);background:rgba(28,40,57,.55)}
.nav__link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(35,230,208,.1);
  box-shadow:inset 0 -2px 0 rgba(35,230,208,.7);
}

.version-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
  padding:7px 14px;
  border-radius:var(--pill);
  border:1px solid rgba(47,123,255,.42);
  background:rgba(47,123,255,.12);
  font-size:12.5px;
  line-height:1.4;
  white-space:nowrap;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.version-tag__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 4px rgba(35,230,208,.18);
}
.version-tag__text{font-weight:700;letter-spacing:.02em;color:var(--text)}
.version-tag__build{font-size:11px;letter-spacing:.1em;color:var(--muted)}
.version-tag[data-entry="preview"]{border-color:rgba(255,166,43,.45);background:rgba(255,166,43,.12)}
.version-tag[data-entry="preview"] .version-tag__dot{background:var(--amber);box-shadow:0 0 0 4px rgba(255,166,43,.18)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 15px;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text);
  font-size:13px;
}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.header-bottom{
  border-top:1px solid var(--line-soft);
  background:rgba(11,17,27,.62);
}
.header-bottom__inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:46px;
  padding-block:8px;
}
.entry-switch{
  display:flex;
  gap:6px;
  padding:4px;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:rgba(5,7,12,.72);
}
.header-note{
  margin-left:auto;
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,110px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,17,27,.72),rgba(5,7,12,1));
}
.footer-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  padding:clamp(36px,5vw,58px) 0 26px;
}
.footer-brand{display:inline-flex;align-items:center;gap:12px}
.footer-brand__mark{
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:12px;
  border:1px solid rgba(47,123,255,.45);
  background:rgba(47,123,255,.14);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
}
.footer-brand__text{display:flex;flex-direction:column;line-height:1.16}
.footer-brand__name{font-size:15px;font-weight:700}
.footer-brand__domain{font-size:11px;letter-spacing:.1em;color:var(--muted)}
.footer-slogan{
  font-size:clamp(18px,2.2vw,28px);
  font-weight:300;
  line-height:1.3;
  max-width:24ch;
  color:var(--text);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:26px;
  padding-bottom:34px;
  border-bottom:1px solid var(--line);
}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:400;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted);
}
.footer-list li + li{margin-top:9px}
.footer-list__link{
  display:inline-block;
  color:var(--text-soft);
  font-size:14px;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-list__link:hover{color:var(--cyan);transform:translateX(3px)}

.footer-contact{
  display:grid;
  gap:8px;
  padding:24px 0;
  border-bottom:1px solid var(--line);
}
.footer-contact__row{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
  font-size:13.5px;
  color:var(--text-soft);
}
.footer-contact__key{
  font-size:11px;
  letter-spacing:.2em;
  color:var(--blue);
}
.footer-contact__note{
  max-width:60ch;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted);
}

.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:20px 0 40px;
  font-size:12.5px;
  color:var(--muted);
}
.footer-meta__version{font-size:12px;letter-spacing:.1em}
.footer-meta__legal{display:flex;flex-wrap:wrap;gap:16px}
.footer-meta__copy{font-size:12.5px}

.to-top{
  position:fixed;
  right:clamp(14px,3vw,26px);
  bottom:clamp(16px,3vw,26px);
  z-index:105;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  border-radius:var(--pill);
  border:1px solid rgba(35,230,208,.35);
  background:rgba(11,17,27,.94);
  color:var(--text);
  font-size:13px;
  opacity:0;
  transform:translateY(10px);
  pointer-events:none;
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.to-top:hover{border-color:var(--cyan)}
.to-top[data-visible="true"]{opacity:1;transform:none;pointer-events:auto}

/* ---------- 8. 显现 ---------- */
[data-reveal]{transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease)}
.has-js [data-reveal]:not(.is-visible){opacity:0;transform:translateY(12px)}
.is-visible{opacity:1;transform:none}

/* ---------- 9. 焦点 ---------- */
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:6px;
}
.chip:focus-visible,.btn:focus-visible,.nav__link:focus-visible,.to-top:focus-visible{border-radius:var(--pill)}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1080px){
  .nav__link{padding:9px 10px;font-size:13.5px}
  .brand__domain{display:none}
  .header-note{display:none}
}

@media (max-width:900px){
  .header-top__inner{position:relative}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .version-tag{margin-left:auto;padding:6px 11px}
  .version-tag__build{display:none}
  [data-nav]{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    margin:0;
    padding:10px var(--gutter) 18px;
    background:#080C14;
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 44px rgba(0,0,0,.58);
  }
  .site-header[data-open="true"] [data-nav]{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav__link{padding:12px 14px;font-size:15px;border-radius:14px}
  .nav__link[aria-current="page"]{box-shadow:inset 2px 0 0 rgba(35,230,208,.8)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .toc{position:static;border-left:0;padding-left:0}
}

@media (max-width:760px){
  .grid--2,.grid--3,.split{grid-template-columns:minmax(0,1fr)}
  .header-bottom__inner{flex-wrap:wrap;gap:10px}
  .entry-switch{flex:1 1 auto}
  .section-head__note{margin-left:0;width:100%}
  .footer-head{align-items:flex-start}
}

@media (max-width:520px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:22px}
  .chip{padding:8px 14px;font-size:13px}
  .brand__name{font-size:14px}
  .display{font-size:clamp(34px,10vw,48px)}
}

/* ---------- 11. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]:not(.is-visible){opacity:1;transform:none}
  .to-top{transform:none}
}