/* ===========================================================
   半岛体育主站 V3 — 全站共享样式 /assets/site.css
   骨架：夜空深蓝 + 精密网格 + 1px 框架线 + 等宽数字
   =========================================================== */

:root{
  --ink:#0B1A33;
  --ink-2:#14294A;
  --grid:#24406B;
  --cyan:#14B8C4;
  --cyan-soft:#7FE0E6;
  --yellow:#F5C518;
  --orange:#FF5A3C;
  --paper:#F7FAFC;
  --muted:#9FB3C8;
  --green:#3DD68C;
  --paper-light:#EEF3F8;
  --header-h:65px;
  --gutter:24px;
  --max:1360px;
  --frame-x:34px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.68,.32,1);
  --line:1px solid var(--grid);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(36,64,107,.28) 1px,transparent 1px),
    linear-gradient(90deg,rgba(36,64,107,.28) 1px,transparent 1px);
  background-size:140px 140px;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;line-height:1.16;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
a{color:var(--cyan-soft);text-decoration:none;}
a:hover{color:var(--paper);}
::selection{background:var(--cyan);color:var(--ink);}

h1{font-size:clamp(34px,5.2vw,56px);}
h2{font-size:clamp(24px,3.1vw,40px);}
h3{font-size:22px;font-weight:800;letter-spacing:-.01em;}
h4{font-size:17px;font-weight:800;}

/* ---------- 框架线：桌面端左右竖线 ---------- */
body::before,
body::after{
  content:"";
  position:fixed;
  top:0;
  bottom:0;
  width:1px;
  background:var(--grid);
  z-index:5;
  pointer-events:none;
  display:none;
}
body::before{left:var(--frame-x);}
body::after{right:var(--frame-x);}
@media (min-width:1440px){
  body::before,body::after{display:block;}
}

/* ---------- 焦点与可访问性 ---------- */
:focus-visible{outline:2px solid var(--yellow);outline-offset:2px;}
.skip-link{
  position:absolute;
  left:12px;
  top:-70px;
  z-index:120;
  padding:10px 18px;
  background:var(--yellow);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:10px;color:var(--ink);}
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--gutter);
}
.container-narrow{max-width:884px;}
#main-content{display:block;min-height:40vh;scroll-margin-top:calc(var(--header-h) + 12px);}
section[id],h2[id],h3[id]{scroll-margin-top:calc(var(--header-h) + 20px);}
.section{padding:56px 0;}
.section-tight{padding:36px 0;}
.divider{height:1px;background:var(--grid);border:0;margin:0;}
.rule-accent{width:64px;height:3px;background:var(--cyan);border:0;margin:0 0 22px;}
.eyebrow{
  display:block;
  margin:0 0 12px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--cyan);
}
.lead{font-size:19px;line-height:1.8;color:#D9E4EF;max-width:720px;}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:24px;}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr));}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr));}

/* ---------- 页头框架 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,26,51,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.header-line{
  position:relative;
  height:1px;
  background:var(--grid);
  overflow:hidden;
}
.scroll-progress{
  display:block;
  height:1px;
  width:100%;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:16px;
  height:64px;
  border-bottom:1px solid var(--grid);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:none;
  color:var(--paper);
}
.brand:hover{color:var(--paper);}
.brand-sign{
  position:relative;
  width:14px;
  height:14px;
  background:var(--cyan);
  flex:none;
}
.brand-sign::after{
  content:"";
  position:absolute;
  right:0;
  bottom:0;
  width:6px;
  height:6px;
  background:var(--yellow);
}
.brand-text{display:inline-flex;align-items:baseline;gap:8px;}
.brand-name{font-size:17px;font-weight:900;letter-spacing:.01em;}
.brand-version{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  line-height:1.5;
  letter-spacing:.1em;
  padding:1px 6px;
  background:var(--yellow);
  color:var(--ink);
}

/* 导航 */
.primary-nav{flex:1 1 auto;min-width:0;}
.nav-list{
  display:flex;
  justify-content:center;
  align-items:stretch;
  list-style:none;
  margin:0;
  padding:0;
  height:63px;
}
.nav-list>li{display:flex;}
.nav-list>li+li{border-left:1px solid var(--grid);}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  padding:0 15px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:0;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--paper);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--paper);font-weight:700;}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

/* 头部工具区 */
.header-tools{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
  flex:none;
}
.tool-link{
  padding:6px 12px;
  border:1px solid var(--grid);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.tool-link:hover{border-color:var(--cyan);color:var(--paper);}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:8px 12px;
  background:transparent;
  border:1px solid var(--grid);
  color:var(--paper);
  font-size:13px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:border-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);}
.nav-toggle-label{line-height:1;}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:11px;
}
.nav-toggle-bars i{
  position:absolute;
  left:0;
  right:0;
  height:1px;
  background:currentColor;
}
.nav-toggle-bars i:nth-child(1){top:0;}
.nav-toggle-bars i:nth-child(2){top:5px;}
.nav-toggle-bars i:nth-child(3){top:10px;}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:0;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.2;
  cursor:pointer;
  text-align:center;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--orange);border-color:var(--orange);color:var(--ink);}
.btn-primary:hover{background:var(--yellow);border-color:var(--yellow);color:var(--ink);}
.btn-ghost{background:transparent;border-color:var(--grid);color:var(--paper);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan-soft);}
.btn-quiet{background:var(--ink-2);border-color:var(--grid);color:var(--paper);}
.btn-quiet:hover{border-color:var(--cyan);color:var(--cyan-soft);}
.btn-block{display:flex;width:100%;}

/* ---------- 面板 / 标签 / 数据 ---------- */
.panel{
  background:var(--ink-2);
  border:1px solid var(--grid);
  border-radius:0;
  padding:24px;
}
.panel--light{background:var(--paper-light);border-color:#D6E0EA;color:var(--ink);}
.panel--light h2,.panel--light h3,.panel--light h4{color:var(--ink);}
.panel--light a{color:#0C7A85;text-decoration:underline;text-underline-offset:3px;}
.panel--light a:hover{color:var(--orange);}
.panel--mark{border-left:3px solid var(--cyan);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--grid);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.6;
  color:var(--muted);
  background:transparent;
}
.tag--cyan{border-color:var(--cyan);color:var(--cyan-soft);}
.tag--yellow{border-color:var(--yellow);color:var(--yellow);}
.tag--green{border-color:var(--green);color:var(--green);}
.tag--orange{background:var(--orange);border-color:var(--orange);color:var(--ink);}

.mono,.mono-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.01em;
}
.mono-num{font-weight:600;}
.stat-num{
  display:inline-block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  font-size:clamp(28px,3.4vw,42px);
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--yellow);
}

.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:15px;
}
.data-table th{
  padding:12px 16px;
  border-bottom:1px solid var(--grid);
  text-align:left;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--cyan-soft);
  white-space:nowrap;
}
.data-table td{
  padding:14px 16px;
  border-bottom:1px solid var(--grid);
  vertical-align:top;
  color:#DCE6F0;
}
.data-table td.num,.data-table th.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  text-align:right;
  font-weight:600;
}
.data-table tbody tr:hover{background:rgba(20,184,196,.07);}

/* ---------- 章节目录 ---------- */
.toc{
  border:1px solid var(--grid);
  background:var(--ink-2);
  padding:18px 20px;
}
.toc-title{
  margin:0 0 12px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--cyan);
}
.toc ul{list-style:none;display:grid;gap:2px;}
.toc a{
  display:block;
  padding:7px 10px 7px 14px;
  border-left:2px solid transparent;
  font-size:14px;
  color:var(--muted);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.toc a:hover{color:var(--paper);background:rgba(20,184,196,.08);}
.toc a[aria-current="true"]{color:var(--paper);border-left-color:var(--cyan);background:rgba(20,184,196,.1);}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  margin:28px 0 0;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;list-style:none;}
.breadcrumbs li{display:flex;align-items:center;}
.breadcrumbs li+li::before{
  content:"/";
  margin:0 8px;
  color:var(--grid);
}
.breadcrumbs a{color:var(--muted);}
.breadcrumbs a:hover{color:var(--cyan-soft);}
.breadcrumbs [aria-current="page"]{color:var(--paper);}

/* ---------- 图片容器 ---------- */
.img-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-2);
  border:1px solid var(--grid);
}
.img-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,26,51,0) 42%,rgba(11,26,51,.62) 100%);
  pointer-events:none;
}
.img-frame--plain::after{display:none;}
.img-frame--21x9{aspect-ratio:21/9;}
.img-frame--16x9{aspect-ratio:16/9;}
.img-frame--4x3{aspect-ratio:4/3;}
.img-frame--3x4{aspect-ratio:3/4;}
.img-frame--1x1{aspect-ratio:1/1;}
.img-frame figcaption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:12px 16px;
  font-size:13px;
  line-height:1.6;
  color:#DCE6F0;
  background:linear-gradient(180deg,rgba(11,26,51,0) 0%,rgba(11,26,51,.85) 100%);
}

/* ---------- 动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .26s ease-out,transform .26s ease-out;
}
[data-reveal].is-visible{opacity:1;transform:none;}
.back-to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:70;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  background:var(--ink-2);
  border:1px solid var(--grid);
  color:var(--cyan-soft);
  font-size:17px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transition:opacity .2s var(--ease),visibility .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.back-to-top:hover{background:var(--cyan);border-color:var(--cyan);color:var(--ink);}
.back-to-top[data-visible]{opacity:1;visibility:visible;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:72px;
  background:var(--ink-2);
  border-top:1px solid var(--grid);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:140px;
  height:3px;
  background:var(--cyan);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.25fr;
  gap:36px 32px;
  padding:56px 0 36px;
}
.footer-col{min-width:0;}
.footer-title{
  margin:0 0 16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--grid);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--cyan-soft);
}
.footer-note{
  margin:16px 0 0;
  max-width:34em;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.footer-note a{color:var(--paper);border-bottom:1px solid var(--grid);}
.footer-note a:hover{color:var(--cyan-soft);border-color:var(--cyan);}
.footer-list{list-style:none;display:grid;gap:9px;}
.footer-list a{
  display:inline-block;
  font-size:14px;
  line-height:1.6;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan-soft);border-bottom-color:var(--cyan);}
.footer-contact{
  list-style:none;
  display:grid;
  gap:8px;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
}
.footer-contact .mono{color:var(--paper);}
.footer-legal{
  border-top:1px solid var(--grid);
  padding:16px 0;
}
.legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 22px;
  list-style:none;
  font-size:13px;
  letter-spacing:.06em;
}
.legal-links a{color:var(--muted);}
.legal-links a:hover{color:var(--cyan-soft);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 28px;
  padding:18px 0 30px;
  border-top:1px solid var(--grid);
  font-size:13px;
  color:var(--muted);
}
.footer-meta{margin:0;line-height:1.7;}
.footer-meta .mono{color:#C8D6E5;}

/* ---------- 响应式 ---------- */
@media (max-width:1240px){
  .nav-link{padding:0 11px;font-size:12.5px;}
  .tool-link{display:none;}
}
@media (max-width:1024px){
  :root{--gutter:20px;}
  .nav-toggle{display:inline-flex;order:3;margin-left:12px;}
  .header-tools{order:2;margin-left:auto;gap:10px;}
  .brand{order:1;}
  .primary-nav{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    z-index:59;
    background:var(--ink);
    border-bottom:1px solid var(--grid);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .primary-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }
  .nav-list{
    flex-direction:column;
    height:auto;
    justify-content:flex-start;
    padding:6px 0 14px;
  }
  .nav-list>li{display:block;}
  .nav-list>li+li{border-left:0;border-top:1px solid var(--grid);}
  .nav-link{
    height:auto;
    padding:15px var(--gutter);
    font-size:15px;
    letter-spacing:.06em;
  }
  .nav-link::after{left:0;right:auto;top:0;bottom:0;width:3px;height:auto;transform:scaleY(0);}
  .nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:scaleY(1);}
  .grid-4,.grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 24px;}
  .site-footer{margin-top:56px;}
}
@media (max-width:720px){
  body{font-size:16px;line-height:1.8;}
  .grid-2,.grid-3,.grid-4,.grid-12{grid-template-columns:minmax(0,1fr);}
  .section{padding:38px 0;}
  .header-inner{gap:10px;}
  .brand-version{font-size:10px;padding:1px 5px;}
  .brand-name{font-size:15px;}
  .header-tools .btn-primary{padding:9px 12px;font-size:12px;letter-spacing:.06em;}
  .footer-grid{grid-template-columns:minmax(0,1fr);padding:40px 0 28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .panel{padding:18px;}
  .data-table{font-size:14px;}
  .data-table th,.data-table td{padding:10px 10px;}
  .back-to-top{right:14px;bottom:14px;width:42px;height:42px;}
}

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