/* ==========================================================================
   安博·中国 — 共享样式 /assets/site.css
   框架式导航 + 纵向叙事长卷
   ========================================================================== */

/* ---------- 变量 ---------- */
:root{
  --ink-900:#081A16;
  --ink-800:#0E2A23;
  --ink-700:#143A31;
  --cyan:#3BE8C8;
  --cyan-soft:rgba(59,232,200,.10);
  --orange:#FF8A3D;
  --moss:#6F8F7C;
  --line:#2E3A38;
  --bone:#F2F0E6;
  --mist:#C9D2CE;
  --clay:#B4653C;

  --font-display:"Arial Narrow","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han 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;

  --frame-h:118px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
  background:var(--ink-900);
}

body{
  margin:0;
  background:var(--ink-900);
  color:var(--bone);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  color:var(--bone);
  text-wrap:balance;
}
h1{ font-size:clamp(40px,6.4vw,92px); font-weight:900; letter-spacing:-.03em; }
h2{ font-size:clamp(26px,3.2vw,40px); }
h3{ font-size:clamp(19px,1.9vw,26px); }

p{ margin:0 0 1em; }
p:last-child{ margin-bottom:0; }

a{ color:var(--cyan); text-decoration:none; transition:color .18s var(--ease); }
a:hover{ color:#79f4dd; }

ul,ol{ margin:0; padding:0; }

img,svg,video{ max-width:100%; display:block; }

button,input,select,textarea{ font:inherit; color:inherit; }

hr{ border:0; height:1px; background:var(--line); margin:0; }

::selection{ background:var(--cyan); color:var(--ink-900); }

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

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

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:9999;
  padding:12px 22px;
  background:var(--cyan);
  color:var(--ink-900);
  font-weight:700;
  font-size:14px;
  letter-spacing:.02em;
  transform:translateY(-220%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{ transform:translateY(0); color:var(--ink-900); }

/* ==========================================================================
   头部：框架式导航
   ========================================================================== */
.frame{
  position:sticky;
  top:0;
  z-index:300;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
}

/* --- 赛季状态条 --- */
.frame__bar{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:34px;
  padding:6px clamp(16px,3vw,40px);
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(59,232,200,.08),rgba(8,26,22,0) 46%);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.09em;
  color:var(--moss);
}
.frame__bar p{ margin:0; }
.live-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--mist);
  white-space:nowrap;
}
.live-chip__dot{
  width:7px;
  height:7px;
  background:var(--cyan);
  animation:pulseDot 2.4s var(--ease) infinite;
}
@keyframes pulseDot{
  0%{ box-shadow:0 0 0 0 rgba(59,232,200,.55); }
  70%{ box-shadow:0 0 0 9px rgba(59,232,200,0); }
  100%{ box-shadow:0 0 0 0 rgba(59,232,200,0); }
}
.frame__bar-sep{ width:1px; height:12px; background:var(--line); flex:none; }
.frame__bar-note{ color:var(--moss); white-space:nowrap; }
.frame__bar-clock{ margin-inline-start:auto; color:var(--mist); white-space:nowrap; }

/* --- 主导航区 --- */
.frame__main{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:center;
  gap:clamp(16px,3vw,48px);
  padding-inline:clamp(16px,3vw,40px);
  min-height:76px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  color:var(--bone);
  text-decoration:none;
  flex:none;
}
.brand:hover{ color:var(--bone); }
.brand__mark{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  flex:none;
  background:var(--cyan);
  color:var(--ink-900);
  font-family:var(--font-display);
  font-size:19px;
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1;
}
.brand__text{ display:flex; flex-direction:column; gap:1px; min-width:0; }
.brand__name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  line-height:1.2;
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  line-height:1.2;
  letter-spacing:.2em;
  color:var(--moss);
  white-space:nowrap;
}
.brand--foot .brand__mark{ width:32px; height:32px; font-size:17px; }
.brand--foot .brand__name{ font-size:16px; }

/* --- 移动端目录按钮 --- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  min-height:44px;
  min-width:44px;
  padding:0 12px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--bone);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{ border-color:var(--cyan); color:var(--cyan); }
.nav-toggle__bars{ display:grid; gap:4px; width:18px; flex:none; }
.nav-toggle__bars i{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .22s var(--ease),opacity .22s var(--ease),width .22s var(--ease);
}
.nav-toggle__bars i:last-child{ width:70%; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){ width:100%; transform:translateY(-6px) rotate(-45deg); }
.nav-toggle__text{ white-space:nowrap; }

/* --- 导航容器 --- */
.frame__nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(12px,2.4vw,40px);
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
  min-width:0;
}
.nav-list__item{ display:flex; }
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:8px 13px;
  color:var(--mist);
  font-size:15px;
  font-weight:500;
  letter-spacing:.01em;
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{
  color:var(--bone);
  background:var(--cyan-soft);
}
.nav-link__idx{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:var(--moss);
  transition:color .18s var(--ease);
}
.nav-link__label{ white-space:nowrap; }
.nav-link:hover .nav-link__idx{ color:var(--cyan); }
.nav-link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.nav-link[aria-current="page"] .nav-link__idx{ color:var(--orange); }

/* --- 开赛倒计时 --- */
.frame__kick{
  display:flex;
  align-items:center;
  gap:12px;
  flex:none;
  min-height:44px;
  padding-inline-start:clamp(12px,2vw,24px);
  border-inline-start:1px solid var(--line);
}
.frame__kick-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--moss);
  white-space:nowrap;
}
.frame__kick-time{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(17px,1.6vw,21px);
  font-weight:700;
  letter-spacing:.02em;
  color:var(--orange);
  white-space:nowrap;
}

/* --- 滚动进度 --- */
.frame__progress{ height:2px; background:transparent; }
.frame__progress span{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.foot{
  position:relative;
  background:var(--ink-900);
  border-top:1px solid var(--line);
}
.foot::before{
  content:"";
  display:block;
  height:5px;
  background-image:repeating-linear-gradient(90deg,rgba(59,232,200,.45) 0 1px,transparent 1px 22px);
}
.foot__inner{
  width:min(1300px,calc(100% - clamp(32px,6vw,96px)));
  margin-inline:auto;
  padding-block:clamp(44px,6vw,80px);
  display:grid;
  grid-template-columns:1.5fr 1fr 1.1fr 1.3fr;
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.foot__col{
  display:flex;
  flex-direction:column;
  gap:14px;
  min-width:0;
}
.foot__col--lead{ gap:18px; }
.foot__title{
  margin:0 0 2px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--moss);
}
.foot__tagline{
  margin:0;
  max-width:28ch;
  font-size:15px;
  line-height:1.7;
  color:var(--mist);
}
.foot__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.9;
  letter-spacing:.04em;
  color:var(--moss);
}
.foot__list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.foot__list a{
  display:inline-flex;
  align-items:center;
  width:fit-content;
  min-height:32px;
  font-size:15px;
  color:var(--bone);
  transition:color .18s var(--ease);
}
.foot__list a::before{
  content:"";
  width:0;
  height:1px;
  background:var(--cyan);
  margin-inline-end:0;
  transition:width .2s var(--ease),margin-inline-end .2s var(--ease);
}
.foot__list a:hover{ color:var(--cyan); }
.foot__list a:hover::before{ width:14px; margin-inline-end:8px; }
.foot__list--plain li{
  font-size:14px;
  color:var(--mist);
  min-height:32px;
  display:flex;
  align-items:center;
}
.foot__base{ border-top:1px solid var(--line); }
.foot__base-inner{
  width:min(1300px,calc(100% - clamp(32px,6vw,96px)));
  margin-inline:auto;
  padding-block:22px 30px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 32px;
  justify-content:space-between;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--moss);
}
.foot__base-inner p{ margin:0; }

/* ==========================================================================
   通用容器与组件
   ========================================================================== */
.container{ width:min(1300px,calc(100% - clamp(32px,6vw,96px))); margin-inline:auto; }
.container--narrow{ width:min(780px,calc(100% - clamp(32px,6vw,96px))); margin-inline:auto; }
.container--wide{ width:min(1560px,calc(100% - clamp(24px,4vw,64px))); margin-inline:auto; }

/* --- 章节 --- */
.section{
  padding-block:clamp(56px,8vw,120px);
  border-top:1px solid var(--line);
}
.section--tight{ padding-block:clamp(32px,5vw,64px); }
.section--flush{ border-top:0; }

.eyebrow{
  display:flex;
  align-items:center;
  gap:14px;
  margin:0 0 18px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::after{
  content:"";
  flex:1;
  height:1px;
  background:var(--line);
}
.eyebrow--data{ color:var(--orange); }

.lede{
  max-width:64ch;
  font-size:clamp(17px,1.4vw,20px);
  line-height:1.8;
  color:var(--mist);
}

/* --- 按钮 --- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:0 24px;
  border:1px solid var(--cyan);
  background:var(--cyan);
  color:var(--ink-900);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{ background:#71f2da; border-color:#71f2da; color:var(--ink-900); }
.btn--ghost{ background:transparent; color:var(--cyan); }
.btn--ghost:hover{ background:var(--cyan-soft); border-color:var(--cyan); color:var(--cyan); }
.btn--data{ background:var(--orange); border-color:var(--orange); color:var(--ink-900); }
.btn--data:hover{ background:#ffa76a; border-color:#ffa76a; color:var(--ink-900); }

/* --- 面包屑 --- */
.crumbs{
  margin-bottom:26px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--moss);
}
.crumbs ol{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  list-style:none;
}
.crumbs li{ display:flex; align-items:center; gap:10px; }
.crumbs li + li::before{ content:"/"; color:var(--line); }
.crumbs a{ color:var(--moss); }
.crumbs a:hover{ color:var(--cyan); }

/* --- 细线网格 --- */
.grid-lines{
  display:grid;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.grid-lines > *{
  background:var(--ink-900);
  min-width:0;
}

/* --- 卡片 --- */
.card{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(18px,2.4vw,28px);
  background:var(--ink-800);
  border:1px solid var(--line);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.card:hover{ border-color:var(--cyan); }
.card__title{
  margin:0;
  font-family:var(--font-display);
  font-size:clamp(19px,1.6vw,23px);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.28;
  color:var(--bone);
}
.card__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--moss);
}
.card__text{
  margin:0;
  font-size:15px;
  line-height:1.7;
  color:var(--mist);
}
.card__link{ margin-top:auto; align-self:flex-start; }

/* --- 章节索引高亮 --- */
[data-chapter-link]{
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
[data-chapter-link][aria-current="true"]{
  color:var(--cyan);
  border-color:var(--cyan);
}

/* --- 图片容器 --- */
.figure{
  margin:0;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:
    linear-gradient(135deg,rgba(59,232,200,.10),transparent 56%),
    var(--ink-800);
  border:1px solid var(--line);
}
.media--wide{ aspect-ratio:21 / 9; }
.media--panel{ aspect-ratio:4 / 3; }
.media--square{ aspect-ratio:1 / 1; }
.media--tall{ aspect-ratio:3 / 4; }
.media > img,
.media > picture{ width:100%; height:100%; }
.media > img,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media__grid{
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(rgba(46,58,56,.75) 1px,transparent 1px),
    linear-gradient(90deg,rgba(46,58,56,.75) 1px,transparent 1px);
  background-size:40px 40px;
}
.media__tag{
  position:absolute;
  inset-inline-start:0;
  inset-block-start:0;
  padding:5px 10px;
  background:var(--orange);
  color:var(--ink-900);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.media__tag--cool{ background:var(--cyan); }
.figure__caption{
  padding-top:10px;
  border-top:1px dashed var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.04em;
  color:var(--moss);
}

/* --- 返回顶部 --- */
.back-top{
  position:fixed;
  inset-inline-end:clamp(16px,3vw,32px);
  inset-block-end:clamp(16px,3vw,32px);
  z-index:180;
  width:48px;
  height:48px;
  display:grid;
  place-items:center;
  background:var(--ink-800);
  border:1px solid var(--cyan);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background-color .18s var(--ease),color .18s var(--ease);
}
.back-top.is-on{ opacity:1; visibility:visible; transform:translateY(0); }
.back-top:hover{ background:var(--cyan); color:var(--ink-900); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1080px){
  .frame__bar-note{ display:none; }
  .nav-link{ padding:8px 10px; font-size:14.5px; }
}

@media (max-width:1023px){
  :root{ --frame-h:104px; }
  html{ scroll-padding-top:112px; }

  .frame__main{
    grid-template-columns:1fr auto;
    min-height:66px;
    gap:12px;
  }

  .nav-toggle{ display:inline-flex; }

  .frame__nav{
    display:none;
    position:absolute;
    inset-inline:0;
    top:100%;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    background:var(--ink-800);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:calc(100dvh - 108px);
    overflow-y:auto;
    box-shadow:0 28px 64px rgba(0,0,0,.62);
  }
  .frame__nav[data-open="true"]{ display:flex; }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list__item{ border-bottom:1px solid var(--line); }
  .nav-link{
    display:flex;
    width:100%;
    min-height:52px;
    padding:15px 22px;
    border-bottom:0;
    font-size:16px;
  }
  .nav-link[aria-current="page"]{
    background:var(--cyan-soft);
    box-shadow:inset 3px 0 0 var(--cyan);
  }

  .frame__kick{
    border-inline-start:0;
    justify-content:space-between;
    min-height:58px;
    padding:18px 22px;
  }

  .foot__inner{ grid-template-columns:1fr 1fr; }
}

@media (max-width:860px){
  .frame__bar-clock{ display:none; }
}

@media (max-width:620px){
  body{ font-size:15.5px; }
  .brand__sub{ display:none; }
  .brand__name{ font-size:16px; }
  .frame__bar{ font-size:11px; gap:10px; }
  .foot__inner{ grid-template-columns:1fr; gap:34px; }
  .foot__base-inner{ flex-direction:column; gap:6px; }
  .media--wide,
  .media--panel{ aspect-ratio:16 / 9; }
}

/* ==========================================================================
   动效回退
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .frame__progress span{ transition:none; }
  .back-top{ transform:none; }
}