/* ===== 雷霆体育 · 共享样式 /assets/site.css ===== */
*,*::before,*::after{box-sizing:border-box}

:root{
  --ink-900:#071426;
  --ink-800:#0B1F3A;
  --ink-700:#12294A;
  --cy:#00E5FF;
  --cy-soft:#7FF3FF;
  --flame:#FF5C1A;
  --flame-deep:#D93A0B;
  --paper:#F2F6FA;
  --white:#FFFFFF;
  --mist:#8A9BB0;
  --line:rgba(138,155,176,.18);
  --line-strong:rgba(138,155,176,.38);
  --rail-w:72px;
  --wrap:1180px;
  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",ui-sans-serif,system-ui,sans-serif;
  --font-data:"DIN Alternate","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- reset 与中文排版 ---------- */
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink-800);
  background-image:
    linear-gradient(to right,rgba(138,155,176,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(138,155,176,.055) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-weight:900;line-height:1.15;letter-spacing:-.02em}
a{color:var(--cy);text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--cy-soft)}
img,picture,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
main{display:block}
:focus-visible{outline:2px solid var(--cy);outline-offset:3px}
[hidden]{display:none !important}

.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip-link{
  position:fixed;left:12px;top:-80px;z-index:200;
  padding:12px 18px;background:var(--cy);color:var(--ink-900);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transition:top .16s var(--ease);
}
.skip-link:focus{top:12px;color:var(--ink-900)}

/* ---------- 头部：吸顶双层 + 品牌轨道 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.brand-rail{display:none}
.header-bar{max-width:1320px;margin:0 auto;padding:0 16px}
.header-top{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:12px 0;
  border-bottom:1px solid var(--line);
}
.brand-line{
  display:flex;align-items:baseline;gap:6px;
  margin-right:auto;
  color:var(--white);
  font-size:18px;font-weight:900;letter-spacing:-.01em;line-height:1.3;
}
.brand-line__mark{display:inline-block;transform:skewX(-5deg)}
.brand-line__sub{
  font-family:var(--font-data);
  font-size:11.5px;font-weight:500;letter-spacing:.16em;
  color:var(--mist);text-transform:uppercase;
}
.status-line{
  display:none;align-items:center;gap:8px;
  font-family:var(--font-data);font-size:12px;letter-spacing:.04em;color:var(--mist);
}
.status-dot{width:14px;height:2px;background:var(--cy)}
@keyframes signalPulse{0%,100%{opacity:.35}50%{opacity:1}}

.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  min-height:48px;padding:0 14px;
  background:transparent;border:1px solid var(--line-strong);border-radius:0;
  color:var(--paper);font-size:13px;font-weight:700;letter-spacing:.1em;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--cy);color:var(--cy)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--cy)}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cy);
  transition:transform .16s var(--ease),top .16s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle__label{font-size:13px;letter-spacing:.1em}

.site-nav{max-height:0;overflow:hidden;transition:max-height .22s var(--ease)}
.site-nav[data-open]{max-height:70vh;overflow-y:auto;border-top:1px solid var(--line)}
.site-nav__list{display:block}
.site-nav__item{border-bottom:1px solid var(--line)}
.site-nav__item:last-child{border-bottom:0}
.site-nav__link{
  display:flex;align-items:baseline;gap:10px;
  min-height:48px;padding:12px 4px;
  color:var(--paper);font-size:16px;font-weight:600;
  transition:color .16s var(--ease),box-shadow .16s var(--ease),padding .16s var(--ease);
}
.site-nav__link:hover{color:var(--cy)}
.site-nav__index{
  font-family:var(--font-data);font-size:12px;font-weight:700;letter-spacing:.1em;
  color:var(--mist);
}
.site-nav__link[aria-current="page"]{
  color:var(--cy);
  box-shadow:inset 3px 0 0 var(--cy);
  padding-left:12px;
}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--cy)}

/* ---------- 底部拇指条 ---------- */
.thumb-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;gap:10px;
  padding:10px 12px;
  padding-bottom:calc(10px + env(safe-area-inset-bottom,0px));
  background:var(--ink-900);
  border-top:1px solid rgba(0,229,255,.3);
  transition:transform .22s var(--ease),opacity .22s var(--ease),visibility .22s var(--ease);
}
.thumb-bar .btn{flex:1 1 0}
.thumb-bar[data-hidden]{transform:translateY(130%);opacity:0;visibility:hidden;pointer-events:none}
@media (max-width:1023px){body{padding-bottom:80px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 20px;
  background:transparent;border:1px solid transparent;border-radius:0;
  color:var(--paper);font-size:15px;font-weight:700;letter-spacing:.02em;
  text-align:center;cursor:pointer;text-decoration:none;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn--signal{background:var(--flame);color:#1A0700}
.btn--signal:hover{background:#FF7A3D;color:#1A0700}
.btn--ghost{border-color:rgba(0,229,255,.55);color:var(--cy)}
.btn--ghost:hover{border-color:var(--cy);background:rgba(0,229,255,.12);color:var(--cy-soft)}
.btn--cyan{background:var(--cy);color:var(--ink-900)}
.btn--cyan:hover{background:var(--cy-soft);color:var(--ink-900)}
.btn--block{width:100%}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--cy);z-index:120;transition:width .12s linear;
}

/* ---------- 正文容器与章节 ---------- */
.content-wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:32px 16px}
.section{padding:48px 0;border-top:1px solid var(--line)}
main > .section:first-child,.section--flush{border-top:0}
.section-head{display:flex;align-items:baseline;gap:14px;margin-bottom:22px}
.section-num{
  font-family:var(--font-data);font-size:13px;font-weight:700;letter-spacing:.12em;
  color:var(--cy);flex:0 0 auto;
}
.section-title{font-size:clamp(24px,5vw,32px);color:var(--white)}
.eyebrow{
  font-family:var(--font-data);font-size:12px;letter-spacing:.18em;
  color:var(--mist);text-transform:uppercase;
}
.lede{font-size:17px;line-height:1.75;color:#CBD8E6;max-width:38ch}
.note-vertical{
  writing-mode:vertical-rl;
  font-family:var(--font-data);font-size:12px;letter-spacing:.24em;
  color:var(--mist);
}
.rule{height:1px;margin:28px 0;background:var(--line);border:0}
.data-num{
  font-family:var(--font-data);font-variant-numeric:tabular-nums;
  font-weight:700;font-size:1.2em;color:var(--white);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--line-strong);
  font-family:var(--font-data);font-size:12px;letter-spacing:.08em;color:var(--mist);
}

/* ---------- 栅格 ---------- */
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.grid > *{grid-column:span 12}
.span-4,.span-6,.span-8,.span-12{grid-column:span 12}
.offset-1{grid-column-start:auto}

/* ---------- 图片容器基础规则 ---------- */
.media{
  position:relative;overflow:hidden;
  background:var(--ink-700);
  border:1px solid var(--line);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--4x5{aspect-ratio:4 / 5}
.media--16x9{aspect-ratio:16 / 9}
.media--1x1{aspect-ratio:1 / 1}
.media--slant{clip-path:polygon(0 0,100% 0,100% 90%,0 100%)}
.media--glow::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 80% at 82% 10%,rgba(0,229,255,.22),transparent 62%);
}
.media__ph{
  position:absolute;inset:0;
  background:
    repeating-linear-gradient(-45deg,rgba(138,155,176,.10) 0 1px,transparent 1px 12px),
    radial-gradient(90% 70% at 70% 20%,rgba(255,92,26,.14),transparent 60%);
}

/* ---------- 可展开内容组 ---------- */
.fold{
  border-top:1px solid var(--line);
  border-left:2px solid transparent;
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.fold[open]{border-left-color:var(--cy);background:rgba(0,229,255,.045)}
.fold summary{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  min-height:48px;padding:14px 16px 14px 10px;
  color:var(--paper);font-size:16px;font-weight:700;cursor:pointer;list-style:none;
}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{
  content:"+";font-family:var(--font-data);font-size:18px;color:var(--cy);line-height:1;
}
.fold[open] summary::after{content:"–"}
.fold__body{padding:0 16px 18px 10px;font-size:15.5px;line-height:1.75;color:#CBD8E6}

/* ---------- 检索过滤 ---------- */
.search-field{
  display:flex;align-items:center;gap:10px;
  min-height:48px;padding:0 14px;
  background:var(--ink-700);border:1px solid var(--line-strong);
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.search-field:focus-within{border-color:var(--cy);box-shadow:inset 0 -2px 0 var(--cy)}
.search-field__input{
  flex:1 1 auto;min-width:0;min-height:46px;
  background:transparent;border:0;outline:none;
  color:var(--paper);font-size:16px;
}
.search-field__input::placeholder{color:var(--mist)}
.search-empty{padding:14px 0;font-family:var(--font-data);font-size:13px;color:var(--mist)}
[data-filter-item][hidden]{display:none !important}

/* ---------- 复制分享 ---------- */
.copy-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.copy-status{
  min-height:1em;font-family:var(--font-data);font-size:13px;letter-spacing:.04em;
  color:var(--cy);
}

/* ---------- 章节索引 ---------- */
.chapter-index{display:grid;gap:2px}
.chapter-index__link{
  display:flex;align-items:baseline;gap:10px;
  padding:10px 6px;
  border-left:2px solid transparent;
  color:var(--mist);font-size:14px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.chapter-index__link:hover{color:var(--paper)}
.chapter-index__link[data-current]{color:var(--cy);border-left-color:var(--cy)}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-data);font-size:12.5px;letter-spacing:.06em;color:var(--mist);
}
.crumbs a{color:var(--mist)}
.crumbs a:hover{color:var(--cy)}
.crumbs__sep{color:var(--line-strong)}

/* ---------- 滚动渐显 ---------- */
.js [data-reveal]:not([data-reveal="in"]){opacity:0;transform:translateY(10px)}
.js [data-reveal]{
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:64px;
  padding:44px 16px 26px;
  background:var(--ink-900);
  border-top:1px solid var(--line);
}
.footer-grid{
  max-width:var(--wrap);margin:0 auto;
  display:grid;gap:30px;grid-template-columns:1fr;
}
.footer-col{padding-top:2px}
.footer-brand__mark{
  font-size:24px;font-weight:900;letter-spacing:-.01em;color:var(--white);
  line-height:1.2;
}
.footer-brand__line{
  margin-top:8px;
  font-family:var(--font-data);font-size:11.5px;letter-spacing:.2em;color:var(--cy);
}
.footer-brand__op{
  margin-top:14px;max-width:34ch;
  font-size:13.5px;line-height:1.7;color:var(--mist);
}
.footer-col__title{
  margin:0 0 12px;padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--white);
}
.footer-col__list{display:grid;gap:10px}
.footer-link{color:var(--mist);font-size:14px}
.footer-link:hover{color:var(--cy)}
.footer-meta{
  max-width:var(--wrap);margin:36px auto 0;padding-top:18px;
  border-top:1px solid var(--line);
  display:grid;gap:8px;
  font-size:12.5px;color:var(--mist);
}
.footer-contact{font-family:var(--font-data);letter-spacing:.02em;color:var(--paper)}
.footer-legal{line-height:1.7}
.footer-legal .footer-link{font-size:12.5px;color:var(--paper)}
.footer-legal .footer-link:hover{color:var(--cy)}
.footer-icp{font-family:var(--font-data);letter-spacing:.1em}

/* ---------- 动画守护 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .js [data-reveal]:not([data-reveal="in"]){opacity:1;transform:none}
  .scroll-progress{transition:none}
}

/* ---------- 平板 ≥768px ---------- */
@media (min-width:768px){
  .header-bar{padding:0 28px}
  .status-line{display:inline-flex}
  .status-dot{animation:signalPulse 1.8s var(--ease) infinite}
  .nav-toggle{display:none}
  .site-nav{max-height:none;overflow:visible;transition:none;border-top:1px solid var(--line)}
  .site-nav[data-open]{max-height:none;overflow:visible}
  .site-nav__list{display:flex;gap:2px;overflow-x:auto;scrollbar-width:thin}
  .site-nav__item{flex:0 0 auto;border-bottom:0}
  .site-nav__link{
    min-height:52px;padding:14px 16px;
    border-bottom:2px solid transparent;
    box-shadow:none;font-size:15px;
  }
  .site-nav__link[aria-current="page"]{
    padding-left:16px;box-shadow:none;
    border-bottom-color:var(--cy);color:var(--white);
  }
  .content-wrap{padding:40px 28px}
  .section{padding:56px 0}
  .grid{gap:20px}
  .span-4{grid-column:span 6}
  .span-6{grid-column:span 6}
  .span-8{grid-column:span 8}
  .span-12{grid-column:span 12}
  .offset-1{grid-column-start:2}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:34px 28px}
  .footer-meta{grid-template-columns:1fr;margin-top:40px}
}

/* ---------- 桌面 ≥1024px ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .brand-rail{
    display:flex;position:fixed;left:0;top:0;bottom:0;width:var(--rail-w);z-index:80;
    flex-direction:column;align-items:center;justify-content:space-between;
    padding:26px 0;
    background:var(--ink-900);
    border-right:1px solid var(--line);
  }
  .brand-rail__mark{
    writing-mode:vertical-rl;
    font-size:17px;font-weight:900;letter-spacing:.42em;color:var(--white);
  }
  .brand-rail__pulse{
    width:2px;height:64px;
    background:linear-gradient(180deg,var(--cy),rgba(0,229,255,0));
    animation:signalPulse 1.8s var(--ease) infinite;
  }
  .brand-rail__coord{
    writing-mode:vertical-rl;
    font-family:var(--font-data);font-size:10.5px;letter-spacing:.24em;color:var(--mist);
  }
  .header-bar{padding:0 32px}
  .site-nav__link{padding:14px 18px}
  .site-nav__link[aria-current="page"]{padding-left:18px}
  .thumb-bar{display:none}
  .content-wrap{padding:48px 40px}
  .section{padding:64px 0}
  .grid{gap:24px}
  .span-4{grid-column:span 4}
  .span-6{grid-column:span 6}
  .span-8{grid-column:span 8}
  .offset-1{grid-column-start:2}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}
  .footer-meta{grid-template-columns:1fr auto;align-items:baseline;gap:12px 28px}
  .footer-legal{grid-column:1}
  .footer-icp{grid-column:2;text-align:right}
}