/* ==========================================================================
   6688体育登录 · 共享外壳样式 /assets/site.css
   色彩分区：深炭黑主底 / 墨青黑导航 / 深蓝绿·酒红·靛紫分区 / 霓虹青·熔岩橙动作色
   ========================================================================== */

:root{
  --ink-900:#0B0E12;
  --ink-800:#111A1F;
  --ink-700:#182730;
  --deep-teal:#0E3B3A;
  --wine:#7A1F3D;
  --indigo:#3A2E7A;
  --neon:#19E3D1;
  --lava:#FF6A2A;
  --lime:#B6FF3B;
  --mist:#A7B0B8;
  --porcelain:#F2F6F5;

  --line-soft:rgba(167,176,184,.22);
  --line-hard:rgba(25,227,209,.42);

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --header-h:104px;
  --shell-max:1200px;
  --gutter:clamp(16px,4vw,40px);
  --shadow-hard:6px 6px 0 0 var(--indigo);
  --shadow-neon:5px 5px 0 0 var(--neon);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth;}
}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--porcelain);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  margin:0;
  font-weight:800;
  line-height:1.15;
  letter-spacing:.05em;
  color:var(--porcelain);
}
p{margin:0 0 1em;max-width:46ch;}
p:last-child{margin-bottom:0;}
a{color:var(--neon);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--porcelain);}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg{display:block;max-width:100%;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
::selection{background:var(--neon);color:var(--ink-900);}
:focus-visible{outline:3px solid var(--lime);outline-offset:3px;border-radius:2px;}
#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 16px);}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-72px;
  z-index:400;
  padding:10px 18px;
  background:var(--lava);
  color:var(--ink-900);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  border:2px solid var(--ink-900);
  transition:top .18s ease;
}
.skip-link:focus{top:12px;color:var(--ink-900);}

/* ---------- 容器与网格 ---------- */
.container{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--wide{max-width:1400px;}
.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--ink-800);
  border-bottom:2px solid var(--ink-700);
  box-shadow:0 16px 34px -24px rgba(0,0,0,.95);
}
.site-header::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(115deg,transparent 0 22px,rgba(25,227,209,.05) 22px 23px);
}
.header-top,.header-nav-row{position:relative;z-index:1;}

.header-top{
  background:var(--ink-900);
  border-bottom:1px solid var(--line-soft);
}
.header-top__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-block:7px;
}
.header-top__line{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0;
  max-width:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--mist);
}
.header-top__index{
  color:var(--neon);
  font-weight:700;
  letter-spacing:.16em;
}
.header-top__caption{color:var(--mist);}
.header-utility{
  display:flex;
  align-items:center;
  gap:14px;
}
.header-utility__signal{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--lime);
}
.status-dot{
  display:inline-block;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(182,255,59,.16);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.42;transform:scale(.76);}
}
.header-cta{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  background:var(--lava);
  color:var(--ink-900);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  border:2px solid var(--ink-900);
  box-shadow:3px 3px 0 0 var(--neon);
  transition:transform .16s ease,box-shadow .16s ease;
}
.header-cta:hover{
  color:var(--ink-900);
  transform:translate(-1px,-1px);
  box-shadow:5px 5px 0 0 var(--neon);
}

.header-nav-row__inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding-block:12px;
}

.brand-mark{
  display:flex;
  flex-direction:column;
  gap:2px;
  text-decoration:none;
  color:inherit;
  flex-shrink:0;
}
.brand-mark__name{
  font-size:19px;
  font-weight:800;
  letter-spacing:.08em;
  line-height:1.2;
  color:var(--porcelain);
}
.brand-mark__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--neon);
  transition:color .16s ease;
}
.brand-mark:hover .brand-mark__tag{color:var(--lava);}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 14px;
  background:var(--indigo);
  color:var(--porcelain);
  border:2px solid var(--neon);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  transition:background-color .16s ease,color .16s ease;
}
.nav-toggle:hover{background:var(--neon);color:var(--ink-900);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
  transition:background-color .16s ease,box-shadow .16s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{
  background:transparent;
  box-shadow:none;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:16px;
  height:2px;
  background:currentColor;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:rotate(-45deg);}

.site-nav{display:flex;align-items:center;}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav__item{display:flex;}
.site-nav__link{
  display:block;
  padding:9px 13px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--porcelain);
  border:2px solid transparent;
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible{
  color:var(--neon);
  background:rgba(25,227,209,.09);
  border-color:var(--line-hard);
}
.site-nav__link[aria-current="page"]{
  color:var(--ink-900);
  background:var(--neon);
  border-color:var(--neon);
}
.site-nav__link[aria-current="page"]:hover,
.site-nav__link[aria-current="page"]:focus-visible{
  color:var(--ink-900);
  background:var(--lime);
  border-color:var(--lime);
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,110px);
  background:var(--ink-800);
  color:var(--porcelain);
  border-top:2px solid var(--ink-700);
}
.footer-edge{
  height:8px;
  background:repeating-linear-gradient(
    115deg,
    var(--neon) 0 46px,
    var(--ink-900) 46px 54px,
    var(--lava) 54px 100px,
    var(--ink-900) 100px 108px
  );
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.25fr;
  gap:clamp(24px,3.4vw,44px);
  padding-block:clamp(34px,5vw,58px) clamp(26px,3.4vw,40px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;}
.footer-brand__word{
  margin:0 0 4px;
  max-width:none;
  font-family:var(--font-mono);
  font-size:clamp(44px,7vw,76px);
  font-weight:800;
  line-height:.9;
  letter-spacing:.04em;
  color:rgba(25,227,209,.22);
}
.footer-brand__name{
  margin:0 0 12px;
  max-width:none;
  font-size:18px;
  font-weight:800;
  letter-spacing:.1em;
}
.footer-brand__summary{
  margin:0 0 20px;
  max-width:34ch;
  font-size:14px;
  line-height:1.85;
  color:var(--mist);
}
.footer-col{align-content:start;}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--neon);
}
.footer-col__title::before{
  content:"";
  display:inline-block;
  width:14px;
  height:2px;
  margin-right:9px;
  vertical-align:middle;
  background:var(--lava);
}
.footer-link-list{display:grid;gap:2px;}
.footer-link{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:var(--mist);
  transition:color .16s ease,transform .16s ease;
}
.footer-link:hover{color:var(--neon);transform:translateX(3px);}
.footer-contact__item{
  display:grid;
  gap:2px;
  margin:0 0 14px;
  max-width:none;
}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--lava);
}
.footer-contact__value{
  font-size:14px;
  color:var(--porcelain);
  word-break:break-word;
}
.footer-contact__note{
  margin:6px 0 0;
  max-width:32ch;
  font-size:12.5px;
  line-height:1.8;
  color:var(--mist);
}
.footer-baseline{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-block:18px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-meta{margin:0;max-width:none;}
.footer-legal{display:flex;flex-wrap:wrap;gap:6px 18px;}
.footer-legal__item{display:flex;}
.footer-legal__link{
  color:var(--mist);
  padding-bottom:1px;
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-legal__link:hover{color:var(--neon);border-bottom-color:var(--neon);}
.footer-icp{margin:0;max-width:none;color:var(--mist);}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:2px solid transparent;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--porcelain);
  text-decoration:none;
  cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn--primary{
  background:var(--lava);
  color:var(--ink-900);
  border-color:var(--ink-900);
  box-shadow:var(--shadow-neon);
}
.btn--primary:hover{
  background:var(--neon);
  color:var(--ink-900);
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 0 var(--lava);
}
.btn--ghost{
  background:transparent;
  color:var(--neon);
  border-color:var(--neon);
}
.btn--ghost:hover{
  background:var(--neon);
  color:var(--ink-900);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  margin:0 0 clamp(18px,2.4vw,28px);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb__item{
  display:flex;
  align-items:center;
  gap:8px;
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:var(--line-hard);
}
.breadcrumb__link{color:var(--mist);}
.breadcrumb__link:hover{color:var(--neon);}
.breadcrumb__current{color:var(--neon);}

/* ---------- 分区与章节 ---------- */
.section{padding-block:clamp(44px,7vw,92px);}
.section--ink{background:var(--ink-800);}
.section--deep{background:var(--deep-teal);}
.section--wine{background:var(--wine);}
.section--indigo{background:var(--indigo);}

.chapter{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:6px 18px;
  align-items:start;
  margin:0 0 clamp(20px,3vw,36px);
  padding-left:clamp(12px,2vw,20px);
  border-left:6px solid var(--lava);
}
.chapter__index{
  font-family:var(--font-mono);
  font-size:clamp(30px,4.4vw,56px);
  font-weight:800;
  line-height:.95;
  letter-spacing:.02em;
  color:var(--neon);
}
.chapter__title{
  font-size:clamp(22px,3vw,34px);
  letter-spacing:.05em;
}
.chapter__note{
  grid-column:1 / -1;
  margin:0;
  max-width:44ch;
  font-size:14px;
  line-height:1.85;
  color:var(--mist);
}

/* ---------- 数据条与状态 ---------- */
.data-strip{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  padding:12px 16px;
  border:2px solid var(--line-soft);
  border-left:6px solid var(--neon);
  background:rgba(25,227,209,.05);
}
.data-strip__item{
  display:flex;
  align-items:baseline;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--mist);
}
.data-strip__value{
  color:var(--porcelain);
  font-weight:700;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--neon);
}
.mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,26px);
  background:var(--ink-800);
  border:2px solid var(--line-soft);
}
.card--hard{
  border-color:var(--neon);
  box-shadow:var(--shadow-hard);
}
.card__label{
  display:block;
  margin:0 0 8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--lava);
}
.card__title{
  margin:0 0 8px;
  font-size:18px;
  letter-spacing:.04em;
}
.card__text{
  margin:0;
  max-width:40ch;
  font-size:14px;
  line-height:1.8;
  color:var(--mist);
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:2px solid var(--line-hard);
  background:
    linear-gradient(135deg,rgba(25,227,209,.14),rgba(58,46,122,.38) 55%,rgba(255,106,42,.16)),
    var(--ink-900);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.08);
}
.media-frame--slant{clip-path:polygon(0 0,100% 0,100% 86%,0 100%);}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame__caption{
  margin:8px 0 0;
  max-width:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist);
}

/* ---------- 滚动进度条（由 site.js 注入） ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:300;
  display:block;
  width:100%;
  height:3px;
  background:linear-gradient(90deg,var(--neon) 0%,var(--lime) 48%,var(--lava) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 视口显现 ---------- */
[data-js] .reveal{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-js] .reveal.is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1000px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}

@media (max-width:960px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .span-4{grid-column:span 3;}
  .span-5,.span-6,.span-7,.span-8{grid-column:span 6;}
}

/* ---------- 响应式：移动导航 ---------- */
@media (max-width:900px){
  .header-utility__signal{display:none;}
  .header-top__caption{display:none;}
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    top:calc(100% + 12px);
    left:var(--gutter);
    right:var(--gutter);
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:14px;
    background:var(--ink-900);
    border:2px solid var(--neon);
    box-shadow:var(--shadow-hard);
    z-index:60;
  }
  .site-nav[data-open]{display:flex;}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .site-nav__link{
    padding:12px 14px;
    font-size:15px;
    border-bottom:1px solid var(--line-soft);
  }
  .site-nav__link[aria-current="page"]{border-bottom-color:var(--neon);}
}

/* ---------- 响应式：手机 ---------- */
@media (max-width:640px){
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 2;}
  .header-top__inner{padding-block:6px;}
  .header-cta{font-size:11px;padding:5px 11px;box-shadow:2px 2px 0 0 var(--neon);}
  .brand-mark__name{font-size:17px;}
  .brand-mark__tag{font-size:10px;letter-spacing:.16em;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-baseline{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer-brand__word{font-size:clamp(52px,18vw,76px);}
  .chapter{grid-template-columns:1fr;gap:4px;}
  .chapter__index{font-size:34px;}
}

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