/* ==========================================================================
   雷电竞中心 /assets/site.css
   共享层：reset、变量、中文排版、头部、页脚、按钮、面包屑、容器、网格、基础组件
   ========================================================================== */

:root{
  --void:#07070F;
  --void-deep:#050510;
  --panel:#101024;
  --panel-strong:#0B0B1C;
  --volt:#7B3BFF;
  --volt-soft:#8F57FF;
  --haze:#2A1B57;
  --bolt:#FFD400;
  --bolt-soft:#FFDF3D;
  --neon:#2BE7E7;
  --alert:#FF4D6D;
  --ink:#F4F6FF;
  --mist:#8C93B8;
  --dim:#5C6486;
  --line:#232544;

  --font-head:"HarmonyOS Sans SC","Source Han Sans CN","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --header-h:76px;
  --wrap:1280px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--void);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-head);font-weight:800;line-height:1.2;letter-spacing:.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
strong,b{font-weight:700}
::selection{background:var(--volt);color:#fff}
:focus-visible{outline:2px solid var(--bolt);outline-offset:3px;border-radius:1px}
#main-content{scroll-margin-top:96px}

/* ---------- 容器与栅格 ---------- */
.tk-container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

.tk-grid{display:grid;gap:18px}
.tk-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.tk-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.tk-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 章节骨架 ---------- */
.tk-section{position:relative;padding:64px 0;border-top:1px solid var(--line)}
.tk-section--flat{border-top:0}
.tk-section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px 22px;margin-bottom:22px}
.tk-section__no{
  font-family:var(--font-mono);
  font-size:clamp(52px,8vw,104px);
  font-weight:700;
  line-height:.8;
  letter-spacing:-.02em;
  color:var(--volt);
}
@supports ((-webkit-text-stroke:1px #000)){
  .tk-section__no{color:transparent;-webkit-text-stroke:1px var(--volt)}
}
.tk-section__title{font-size:clamp(22px,2.6vw,32px)}
.tk-section__lead{max-width:62ch;margin:0;color:var(--mist);font-size:15px}

.tk-boltline{height:2px;border:0;margin:0;background:linear-gradient(90deg,var(--volt),var(--neon) 48%,var(--bolt));opacity:.85}

.tk-slash-top{clip-path:polygon(0 28px,100% 0,100% 100%,0 100%)}
.tk-slash-bottom{clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 28px))}

/* ---------- 文本与数字 ---------- */
.tk-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.tk-mist{color:var(--mist)}

/* ---------- 按钮 ---------- */
.tk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-head);font-weight:700;font-size:14px;line-height:1;
  letter-spacing:.04em;padding:13px 20px;
  border:1px solid transparent;border-radius:var(--radius);
  background:transparent;color:var(--ink);cursor:pointer;
  transition:background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
}
.tk-btn--sm{padding:10px 14px;font-size:13px}
.tk-btn--volt{background:var(--volt);border-color:var(--volt);color:#fff}
.tk-btn--volt:hover{background:var(--volt-soft);border-color:var(--volt-soft);box-shadow:0 8px 22px rgba(123,59,255,.3)}
.tk-btn--bolt{background:var(--bolt);border-color:var(--bolt);color:var(--void)}
.tk-btn--bolt:hover{background:var(--bolt-soft);border-color:var(--bolt-soft)}
.tk-btn--ghost{border-color:var(--line);color:var(--ink)}
.tk-btn--ghost:hover{border-color:var(--volt);color:#fff;background:rgba(123,59,255,.16)}

/* ---------- 链接扫描线 ---------- */
.tk-link{position:relative;display:inline-block;color:var(--ink);padding-bottom:2px}
.tk-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--bolt);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease-out;
}
.tk-link:hover{color:var(--bolt)}
.tk-link:hover::after{transform:scaleX(1)}

/* ---------- 面包屑 ---------- */
.tk-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:16px 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist)}
.tk-crumb li{display:flex;align-items:center;gap:8px}
.tk-crumb li+li::before{content:"/";color:var(--line)}
.tk-crumb a{color:var(--mist);border-bottom:1px solid transparent;transition:color .16s ease-out,border-color .16s ease-out}
.tk-crumb a:hover{color:var(--ink);border-bottom-color:var(--volt)}
.tk-crumb [aria-current="page"]{color:var(--ink)}

/* ---------- 面板 / 标签 / 数据 / 表格 ---------- */
.tk-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:0 2px 0 rgba(123,59,255,.18);
}
.tk-panel--volt{border-color:var(--haze);box-shadow:0 2px 0 rgba(123,59,255,.45)}

.tk-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;line-height:1;
  letter-spacing:.12em;text-transform:uppercase;
  padding:5px 9px;border:1px solid var(--line);border-radius:1px;color:var(--mist);
  white-space:nowrap;
}
.tk-tag--bolt{background:var(--bolt);border-color:var(--bolt);color:var(--void)}
.tk-tag--neon{border-color:rgba(43,231,231,.45);color:var(--neon)}
.tk-tag--volt{border-color:var(--volt);background:rgba(123,59,255,.16);color:#C6AEFF}
.tk-tag--alert{border-color:rgba(255,77,109,.5);color:var(--alert)}

.tk-stat{display:flex;flex-direction:column;gap:4px}
.tk-stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--mist)}
.tk-stat__value{font-family:var(--font-mono);font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.1;color:var(--ink)}
.tk-stat__value--neon{color:var(--neon)}
.tk-stat__value--bolt{color:var(--bolt)}

.tk-meter{display:block}
.tk-bar{position:relative;height:8px;background:rgba(42,27,87,.55);border:1px solid var(--line);overflow:hidden}
.tk-bar__fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--volt),var(--neon));
  transition:filter .16s ease-out;
}
.tk-meter:hover .tk-bar,.tk-meter:focus-within .tk-bar{border-color:rgba(43,231,231,.55)}
.tk-meter:hover .tk-bar__fill{filter:brightness(1.15) drop-shadow(0 0 6px rgba(43,231,231,.55))}
.tk-meter__note{
  margin:0;max-height:0;opacity:0;overflow:hidden;
  font-size:12px;line-height:1.6;color:var(--neon);
  transition:max-height .16s ease-out,opacity .16s ease-out;
}
.tk-meter:hover .tk-meter__note,.tk-meter:focus-within .tk-meter__note{max-height:60px;opacity:1}

.tk-table{font-size:14px}
.tk-table th{
  font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--mist);text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.tk-table td{padding:12px;border-bottom:1px solid var(--line);color:var(--ink)}
.tk-table tbody tr{transition:background-color .16s ease-out}
.tk-table tbody tr:hover{background:rgba(42,27,87,.35)}
.tk-table .tk-num{text-align:right}

/* ---------- 图片容器基础规则 ---------- */
.tk-media{
  position:relative;overflow:hidden;border:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 80% 0%,rgba(123,59,255,.28),transparent 60%),
    linear-gradient(135deg,#101024,#07070F 62%,#180C33);
}
.tk-media img,.tk-media video{width:100%;height:100%;object-fit:cover}
.tk-media--16x9{aspect-ratio:16/9}
.tk-media--4x3{aspect-ratio:4/3}
.tk-media--1x1{aspect-ratio:1/1}
.tk-media--slash{clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),0 100%)}
.tk-media__cap{
  position:absolute;left:0;right:0;bottom:0;margin:0;padding:16px;
  font-size:12px;line-height:1.6;color:var(--ink);
  background:linear-gradient(180deg,rgba(7,7,15,0),rgba(7,7,15,.94));
}

/* ==========================================================================
   头部
   ========================================================================== */
.tk-header{position:sticky;top:0;z-index:80}
.tk-header__bar{
  position:relative;height:var(--header-h);
  background:linear-gradient(180deg,rgba(7,7,15,.9),rgba(7,7,15,0));
  transition:background-color .22s ease-out,height .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
  border-bottom:1px solid transparent;
}
.tk-header[data-scrolled] .tk-header__bar{
  height:64px;
  background:rgba(16,16,36,.96);
  border-bottom-color:var(--line);
  box-shadow:0 18px 40px rgba(0,0,0,.55);
  backdrop-filter:blur(12px);
}
.tk-header__inner{display:flex;align-items:center;gap:16px;height:100%}

.tk-skip{
  position:absolute;left:16px;top:8px;z-index:200;
  transform:translateY(-180%);
  background:var(--bolt);color:var(--void);font-weight:700;font-size:13px;
  padding:10px 16px;border-radius:1px;
  transition:transform .18s ease-out;
}
.tk-skip:focus{transform:translateY(0)}

/* 品牌 */
.tk-brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.tk-brand__sign{
  width:24px;height:26px;flex:0 0 auto;background:var(--bolt);
  clip-path:polygon(58% 0,18% 56%,46% 56%,34% 100%,84% 42%,54% 42%);
  filter:drop-shadow(0 0 7px rgba(255,212,0,.45));
}
.tk-brand__meta{display:flex;flex-direction:column;gap:2px}
.tk-brand__name{
  font-family:var(--font-head);font-weight:800;font-size:18px;line-height:1.1;
  letter-spacing:.01em;color:var(--ink);
}
.tk-brand__stage{
  font-family:var(--font-mono);font-size:11px;line-height:1.2;
  letter-spacing:.12em;color:var(--neon);
}

/* 导航 */
.tk-nav{display:flex;align-items:center;justify-content:flex-end;gap:18px;flex:1 1 auto;min-width:0}
.tk-nav__list{display:flex;align-items:center;gap:2px}
.tk-nav__list a{
  position:relative;display:block;padding:8px 10px;
  font-size:13.5px;font-weight:500;color:var(--mist);white-space:nowrap;
  transition:color .18s ease-out;
}
.tk-nav__list a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;height:1px;
  background:var(--bolt);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease-out;
}
.tk-nav__list a:hover{color:var(--ink)}
.tk-nav__list a:hover::after{transform:scaleX(1)}
.tk-nav__list a[aria-current="page"]{color:var(--ink)}
.tk-nav__list a[aria-current="page"]::after{transform:scaleX(1);background:var(--volt);height:2px}

.tk-nav__dual{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.tk-dual{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-head);font-weight:700;font-size:13px;line-height:1;
  letter-spacing:.04em;padding:10px 14px;border:1px solid var(--line);border-radius:var(--radius);
  color:var(--ink);white-space:nowrap;
  transition:background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
}
.tk-dual--volt{background:var(--volt);border-color:var(--volt);color:#fff}
.tk-dual--volt:hover{background:var(--volt-soft);border-color:var(--volt-soft);box-shadow:0 8px 22px rgba(123,59,255,.32)}
.tk-dual--bolt{border-color:var(--bolt);color:var(--bolt)}
.tk-dual--bolt:hover{background:var(--bolt);color:var(--void)}

.tk-nav__tail{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.tk-index-btn{
  font-family:var(--font-head);font-weight:700;font-size:12.5px;line-height:1;
  letter-spacing:.06em;color:var(--mist);
  padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius);
  cursor:pointer;
  transition:color .16s ease-out,border-color .16s ease-out,background-color .16s ease-out;
}
.tk-index-btn:hover{color:var(--ink);border-color:var(--volt);background:rgba(123,59,255,.14)}
.tk-index-btn[aria-expanded="true"]{color:#fff;border-color:var(--volt);background:var(--volt)}

/* 汉堡按钮 */
.tk-burger{
  display:none;align-items:center;gap:9px;margin-left:auto;
  padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius);
  color:var(--ink);cursor:pointer;
  transition:border-color .16s ease-out,background-color .16s ease-out;
}
.tk-burger:hover{border-color:var(--volt);background:rgba(123,59,255,.14)}
.tk-burger__box{display:grid;gap:4px;width:16px}
.tk-burger__box span{display:block;height:1px;background:currentColor;transition:transform .2s ease-out,opacity .2s ease-out}
.tk-burger[aria-expanded="true"] .tk-burger__box span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.tk-burger[aria-expanded="true"] .tk-burger__box span:nth-child(2){opacity:0}
.tk-burger[aria-expanded="true"] .tk-burger__box span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.tk-burger__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase}

/* 滚动进度 */
.tk-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:transparent;overflow:hidden}
.tk-progress__fill{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--volt),var(--neon) 58%,var(--bolt));
  transform:scaleX(0);transform-origin:left;
}

/* 站内索引面板 */
.tk-index{
  position:absolute;left:0;right:0;top:100%;
  background:var(--panel-strong);
  border-bottom:1px solid var(--line);
  box-shadow:0 30px 60px rgba(0,0,0,.6);
  max-height:calc(100vh - var(--header-h));
  overflow:auto;
}
.tk-index[hidden]{display:none}
.tk-index__panel{
  display:grid;
  grid-template-columns:.9fr repeat(4,minmax(0,1fr));
  gap:24px;
  padding-top:26px;
  padding-bottom:30px;
  align-items:start;
}
.tk-index__intro{border-left:2px solid var(--volt);padding-left:14px}
.tk-index__eyebrow{
  margin:0 0 4px;font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--bolt);
}
.tk-index__hint{margin:0;font-size:13px;line-height:1.6;color:var(--mist)}
.tk-index__group{min-width:0}
.tk-index__title{
  margin:0 0 10px;font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--neon);
}
.tk-index__list{display:grid;gap:1px}
.tk-index__list a{
  display:block;padding:6px 0;font-size:14px;color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .16s ease-out,border-color .16s ease-out,padding-left .16s ease-out;
}
.tk-index__list a:hover{color:var(--ink);border-bottom-color:var(--volt);padding-left:4px}

/* ==========================================================================
   页脚
   ========================================================================== */
.tk-footer{
  position:relative;margin-top:96px;
  background:var(--void-deep);
  border-top:1px solid var(--line);
  color:var(--mist);font-size:14px;
}
.tk-footer::before{
  content:"";display:block;height:2px;
  background:linear-gradient(90deg,var(--volt),var(--neon) 46%,var(--bolt));
  opacity:.9;
}
.tk-footer__head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 40px;
  padding-top:44px;padding-bottom:30px;
  border-bottom:1px solid var(--line);
}
.tk-footer__brand{flex:0 0 auto}
.tk-footer__line{margin:0;max-width:58ch;line-height:1.7;color:var(--mist)}

.tk-footer__cols{
  display:grid;
  grid-template-columns:1.15fr 1.25fr 1fr;
  gap:36px;
  padding-top:36px;padding-bottom:34px;
}
.tk-footer__col{min-width:0}
.tk-footer__title{
  margin:0 0 14px;font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--bolt);
}
.tk-footer__list{display:grid;gap:8px}
.tk-footer__list a{
  color:var(--mist);border-bottom:1px solid transparent;
  transition:color .16s ease-out,border-color .16s ease-out;
}
.tk-footer__list a:hover{color:var(--ink);border-bottom-color:var(--volt)}
.tk-footer__legal{
  display:flex;flex-wrap:wrap;gap:18px;margin-top:16px;padding-top:14px;
  border-top:1px solid var(--line);font-size:13px;
}
.tk-footer__item{display:flex;gap:10px;flex-wrap:wrap;line-height:1.65}
.tk-footer__label{
  flex:0 0 auto;min-width:62px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--dim);
  padding-top:2px;
}
.tk-footer__value{flex:1 1 180px;min-width:0;color:var(--mist);word-break:break-word}
.tk-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;
  padding-top:18px;padding-bottom:28px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;color:var(--dim);
}
.tk-footer__copy,.tk-footer__icp{margin:0}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1180px){
  .tk-nav__list a{padding:8px 7px;font-size:13px}
  .tk-nav{gap:12px}
  .tk-dual{padding:10px 11px;font-size:12.5px}
}

@media (max-width:1100px){
  :root{--header-h:66px}
  .tk-burger{display:inline-flex}
  .tk-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;
    background:rgba(11,11,28,.985);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 50px rgba(0,0,0,.6);
    padding:10px 24px 24px;
    max-height:calc(100vh - 66px);
    overflow:auto;
  }
  .tk-nav[data-open]{display:flex}
  .tk-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .tk-nav__list a{
    padding:14px 2px;font-size:15px;color:var(--ink);
    border-bottom:1px solid var(--line);
  }
  .tk-nav__list a::after{left:2px;right:auto;width:42px;bottom:9px}
  .tk-nav__dual{margin-top:18px;gap:10px}
  .tk-dual{flex:1 1 0;padding:13px 12px;font-size:14px}
  .tk-nav__tail{margin-top:14px;justify-content:space-between}
  .tk-nav__tail .tk-btn{flex:0 1 auto}
  .tk-index__panel{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 20px}
  .tk-index__intro{grid-column:1 / -1}
}

@media (max-width:1024px){
  .tk-grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .tk-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 26px}
  .tk-footer__col:first-child{grid-column:1 / -1}
  .tk-footer__list{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .tk-grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tk-section{padding:52px 0}
}
@media (max-width:640px){
  .tk-container{padding:0 18px}
  .tk-grid--2,.tk-grid--3,.tk-grid--4{grid-template-columns:minmax(0,1fr)}
  .tk-brand__name{font-size:16px}
  .tk-brand__stage{font-size:10px}
  .tk-nav{padding:8px 18px 20px}
  .tk-nav__dual{flex-wrap:wrap}
  .tk-dual{flex:1 1 100%}
  .tk-nav__tail{flex-direction:column;align-items:stretch;gap:8px}
  .tk-nav__tail .tk-btn{width:100%}
  .tk-index__panel{grid-template-columns:minmax(0,1fr);gap:20px}
  .tk-index__list{grid-template-columns:repeat(2,minmax(0,1fr));gap:1px 14px}
  .tk-footer__head{padding-top:34px}
  .tk-footer__cols{grid-template-columns:minmax(0,1fr)}
  .tk-footer__list{grid-template-columns:minmax(0,1fr)}
  .tk-footer__legal{width:100%}
  .tk-footer__base{flex-direction:column;align-items:flex-start}
  .tk-table{font-size:13px}
  .tk-table th,.tk-table td{padding:9px 8px}
}

/* ==========================================================================
   可访问性
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}