/* ==========================================================================
   半岛体育 · 共享外壳样式表 /assets/site.css
   侧边轨道导航 + 顶部检索条 + 手册式章节排版
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,figcaption,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;border-spacing:0}
[hidden]{display:none!important}

/* ---------- 2. 变量 ---------- */
:root{
  --deep:#04121F;
  --night:#0A2338;
  --steel:#123A5A;
  --edge:#1F5C86;
  --mist:#9CC0DA;
  --ice:#EDF4FA;
  --gold:#E2B33C;
  --pulse:#35E0C2;
  --paper:#F4F1E8;
  --ink:#16202B;
  --amber:#C97A2B;

  --rail-w:96px;
  --bar-h:64px;
  --maxw:1280px;

  --cutpoly:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
  --cutpoly-sm:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px));

  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --line:1px solid var(--edge);
  --line-soft:1px solid rgba(31,92,134,.45);
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background:var(--deep);
  color:var(--ice);
  font-family:var(--font-cn);
  font-size:16px;
  font-weight:400;
  line-height:1.55;
  letter-spacing:.01em;
  padding-left:var(--rail-w);
  padding-top:var(--bar-h);
}
.h1,.h2,.h3{font-weight:900;line-height:1.14;letter-spacing:-.02em}
.h1{font-size:clamp(2.4rem,5vw,4rem);line-height:1.08}
.h2{font-size:clamp(1.6rem,2.6vw,2.25rem)}
.h3{font-size:1.25rem;font-weight:800;line-height:1.3}
.lead{font-size:1.0625rem;line-height:1.6;color:var(--mist)}
.p{font-size:1rem;line-height:1.55;color:var(--mist)}
.p+.p{margin-top:1em}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em}
.annot{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--mist)}
.annot--vert{writing-mode:vertical-rl;text-orientation:mixed}
.gold{color:var(--gold)}
.pulse{color:var(--pulse)}
.muted{color:var(--mist)}

:focus-visible{outline:2px solid var(--pulse);outline-offset:3px}
#main-content:focus{outline:none}
#main-content{display:block}
[data-chapter],#main-content{scroll-margin-top:calc(var(--bar-h) + 16px)}

/* ---------- 4. 容器与网格 ---------- */
.shell{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,4vw,56px)}
.shell--wide{max-width:1440px}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,1.8vw,26px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(24px,3.4vw,56px);align-items:start}
.split--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.split--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}

@media (max-width:900px){
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
  .split,.split--8-4,.split--5-7{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 5. 章节 ---------- */
.sec{position:relative;padding:clamp(44px,5.6vw,84px) 0;border-top:var(--line-soft)}
.sec__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:.85rem;margin-bottom:clamp(18px,2vw,28px)}
.sec__idx{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.18em;color:var(--gold)}
.sec__title{font-size:clamp(1.6rem,2.6vw,2.25rem);font-weight:900;line-height:1.14;letter-spacing:-.02em}
.sec__lead{flex:1 1 100%;max-width:62ch;color:var(--mist);font-size:1rem}

/* ---------- 6. 面包屑 ---------- */
.crumbs{padding-top:18px}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em;color:var(--mist)}
.crumbs__item a{color:var(--mist);border-bottom:1px solid transparent;transition:color .16s,border-color .16s}
.crumbs__item a:hover{color:var(--ice);border-bottom-color:var(--gold)}
.crumbs__item[aria-current="page"]{color:var(--ice)}
.crumbs__sep{color:var(--edge)}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.3em;font-size:.9rem;font-weight:800;letter-spacing:.05em;
  color:var(--ice);background:rgba(18,58,90,.55);box-shadow:inset 0 0 0 1px var(--edge);
  clip-path:var(--cutpoly-sm);
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px var(--gold);color:var(--gold)}
.btn--gold{background:var(--gold);color:#08151F;box-shadow:none}
.btn--gold:hover{background:#F0C557;color:#08151F;filter:brightness(1.06)}
.btn--ghost{background:transparent;box-shadow:inset 0 0 0 1px var(--edge)}
.btn--pulse{background:transparent;color:var(--pulse);box-shadow:inset 0 0 0 1px var(--pulse)}
.btn--pulse:hover{color:#08151F;background:var(--pulse)}

/* ---------- 8. 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.3em .72em;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;
  color:var(--mist);background:rgba(18,58,90,.4);box-shadow:inset 0 0 0 1px var(--edge);
  clip-path:var(--cutpoly-sm);transition:color .16s,background-color .16s,box-shadow .16s;
}
button.tag{cursor:pointer}
button.tag:hover{color:var(--ice);box-shadow:inset 0 0 0 1px var(--gold)}
.tag--gold{color:var(--gold);box-shadow:inset 0 0 0 1px var(--gold)}
.tag--pulse{color:var(--pulse);box-shadow:inset 0 0 0 1px var(--pulse)}
.tag[aria-pressed="true"],.tag[data-active="true"]{background:var(--gold);color:#08151F;box-shadow:none}

/* ---------- 9. 面板 ---------- */
.panel{position:relative;padding:clamp(18px,2vw,28px);background:var(--night);box-shadow:inset 0 0 0 1px var(--edge)}
.panel--cut{clip-path:var(--cutpoly)}
.panel--steel{background:linear-gradient(150deg,var(--steel),var(--night) 78%)}
.panel--paper{background:var(--paper);color:var(--ink);box-shadow:none}
.panel--paper .p,.panel--paper .lead{color:#3A4653}

/* ---------- 10. 横向主题带 ---------- */
.band{position:relative;margin:clamp(20px,2.6vw,40px) 0;padding:clamp(18px,2.2vw,30px) 0;border-block:var(--line-soft);background:linear-gradient(90deg,rgba(18,58,90,.5),rgba(4,18,31,0) 82%)}
.band__track{display:flex;gap:clamp(14px,1.6vw,22px);overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:8px;scrollbar-width:thin;scrollbar-color:var(--edge) transparent}
.band__item{flex:0 0 clamp(220px,26vw,320px);scroll-snap-align:start;padding:16px 18px;background:var(--night);box-shadow:inset 0 0 0 1px var(--edge);clip-path:var(--cutpoly);transition:transform .18s ease,box-shadow .18s ease}
.band__item:hover{transform:translateY(-4px);box-shadow:inset 0 0 0 1px var(--gold)}

/* ---------- 11. 图片容器基础规则 ---------- */
.media{position:relative;overflow:hidden;background:linear-gradient(140deg,var(--steel),var(--deep) 74%);box-shadow:inset 0 0 0 1px var(--edge);clip-path:var(--cutpoly)}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:16/9}
.media--banner{aspect-ratio:8/3}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1}
.media__ph{
  position:absolute;inset:0;display:flex;align-items:flex-end;padding:12px 14px;color:var(--mist);
  background:repeating-linear-gradient(135deg,rgba(31,92,134,.26) 0 2px,transparent 2px 13px);
}
.media__cap{position:absolute;left:0;right:0;bottom:0;padding:10px 14px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;color:var(--ice);background:linear-gradient(180deg,transparent,rgba(4,18,31,.88))}

/* ---------- 12. 分隔与装饰 ---------- */
.rule{height:1px;border:0;background:var(--edge)}
.rule--diag{height:1px;border:0;background:linear-gradient(90deg,transparent,var(--edge) 12%,var(--edge) 88%,transparent)}
.slash{display:block;height:clamp(36px,6vw,84px);background:linear-gradient(118deg,transparent 46.6%,rgba(31,92,134,.55) 46.6%,rgba(31,92,134,.55) 53.4%,transparent 53.4%)}

/* ---------- 13. 实时点 ---------- */
.live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--pulse);box-shadow:0 0 0 3px rgba(53,224,194,.18);flex:0 0 auto}
.live-dot--pulse{animation:livePulse 1.9s ease-in-out infinite}
@keyframes livePulse{0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(53,224,194,.18)}50%{opacity:.55;box-shadow:0 0 0 6px rgba(53,224,194,.06)}}

/* ---------- 14. 章节索引 ---------- */
.chapter-index{position:sticky;top:calc(var(--bar-h) + 24px)}
.chapter-index__list{display:flex;flex-direction:column}
.chapter-index__list a{
  display:flex;align-items:baseline;gap:.7rem;padding:9px 14px;
  border-left:2px solid rgba(31,92,134,.5);color:var(--mist);font-size:.9rem;
  transition:color .18s,border-color .18s,background-color .18s;
}
.chapter-index__list a:hover{color:var(--ice);background:rgba(18,58,90,.5)}
.chapter-index__list a[data-active]{color:var(--gold);border-left-color:var(--gold);background:rgba(18,58,90,.45)}

/* ---------- 15. 折叠面板 ---------- */
.acc{border-top:var(--line-soft)}
.acc__btn{width:100%;display:flex;align-items:flex-start;gap:.9rem;padding:16px 4px;text-align:left;color:var(--ice);font-size:1.02rem;font-weight:700;transition:color .16s}
.acc__btn:hover{color:var(--gold)}
.acc__sign{position:relative;flex:0 0 auto;width:12px;height:12px;margin-left:auto;margin-top:.35em}
.acc__sign::before,.acc__sign::after{content:"";position:absolute;left:0;right:0;top:50%;height:1.5px;background:currentColor;transform:translateY(-50%)}
.acc__sign::after{transform:translateY(-50%) rotate(90deg);transition:transform .2s ease}
.acc__btn[aria-expanded="true"]{color:var(--gold)}
.acc__btn[aria-expanded="true"] .acc__sign::after{transform:translateY(-50%) rotate(0deg)}
.acc__panel{padding:0 4px 18px;color:var(--mist);font-size:.95rem}

/* ---------- 16. 表格 ---------- */
.tbl-wrap{overflow-x:auto;box-shadow:inset 0 0 0 1px var(--edge)}
.tbl{width:100%;min-width:520px;font-size:.9rem}
.tbl th,.tbl td{padding:12px 16px;text-align:left;border-bottom:var(--line-soft)}
.tbl th{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mist);background:rgba(18,58,90,.45)}
.tbl tbody tr{transition:background-color .16s}
.tbl tbody tr:hover{background:rgba(18,58,90,.4)}
.tbl--paper{background:var(--paper);color:var(--ink)}
.tbl--paper th{background:rgba(22,32,43,.06);color:#3A4653}
.tbl--paper th,.tbl--paper td{border-bottom-color:rgba(22,32,43,.14)}
.tbl--paper tbody tr:hover{background:rgba(22,32,43,.05)}

/* ---------- 17. 显现（无脚本时默认可见） ---------- */
html[data-reveal="on"] [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
html[data-reveal="on"] [data-reveal][data-visible]{opacity:1;transform:none}

/* ==========================================================================
   18. 共享头部
   ========================================================================== */
.skip-link{
  position:absolute;left:var(--rail-w);top:0;z-index:120;
  padding:10px 18px;background:var(--gold);color:#08151F;font-size:.85rem;font-weight:800;letter-spacing:.06em;
  transform:translateY(-130%);transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

.site-head{position:relative;z-index:70}

/* --- 侧边轨道 --- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:70;
  display:flex;flex-direction:column;align-items:center;gap:16px;
  padding:18px 0 20px;
  background:linear-gradient(180deg,#061A2B,var(--night) 58%,var(--deep));
  border-right:var(--line);
}
.rail__brand{display:flex;flex-direction:column;align-items:center;gap:10px;padding:4px 0 6px}
.rail__brand-mark{width:16px;height:16px;background:var(--gold);clip-path:polygon(0 0,100% 0,100% 58%,58% 100%,0 100%)}
.rail__brand-cn{writing-mode:vertical-rl;text-orientation:upright;font-size:.98rem;font-weight:900;letter-spacing:.22em;color:var(--ice)}
.rail__brand-en{writing-mode:vertical-rl;font-family:var(--font-mono);font-size:.58rem;letter-spacing:.3em;color:var(--edge)}

.rail__nav{display:flex;flex-direction:column;width:100%;flex:1 1 auto;overflow-y:auto;overflow-x:hidden}
.rail__nav-title{display:none}
.rail__list{display:flex;flex-direction:column;width:100%}
.rail__item{display:block;width:100%}
.rail__link{
  position:relative;display:flex;flex-direction:column;gap:3px;
  padding:11px 10px 11px 18px;color:var(--mist);
  transition:background-color .18s ease,color .18s ease;
}
.rail__idx{font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;color:var(--edge);transition:color .18s ease}
.rail__label{font-size:.84rem;font-weight:700;letter-spacing:.1em}
.rail__link:hover{background:rgba(18,58,90,.6);color:var(--ice)}
.rail__link[aria-current="page"]{background:rgba(226,179,60,.1);color:var(--gold)}
.rail__link[aria-current="page"]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gold)}
.rail__link[aria-current="page"] .rail__idx{color:var(--gold)}

.rail__cta{display:none}

.rail__foot{width:100%;display:flex;justify-content:center;padding:10px 0 0;border-top:var(--line-soft)}
.rail__live{display:flex;flex-direction:column;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;color:var(--mist)}

.rail__progress{
  position:absolute;top:0;bottom:0;right:-1px;width:2px;pointer-events:none;
  background:linear-gradient(180deg,var(--gold),var(--pulse));
  transform:scaleY(0);transform-origin:top center;
}

/* --- 遮罩 --- */
.nav-scrim{display:none}

/* --- 顶部条 --- */
.headbar{
  position:fixed;top:0;left:var(--rail-w);right:0;height:var(--bar-h);z-index:60;
  background:rgba(10,35,56,.9);backdrop-filter:blur(10px);
  border-bottom:var(--line);
}
.headbar__inner{height:100%;display:flex;align-items:center;gap:14px;padding:0 clamp(16px,3vw,40px)}
.headbar__brand{display:none;align-items:center;gap:8px;font-size:1rem;font-weight:900;letter-spacing:.06em;color:var(--ice)}
.headbar__brand::before{content:"";width:12px;height:12px;background:var(--gold);clip-path:polygon(0 0,100% 0,100% 58%,58% 100%,0 100%)}

.searchlink{
  flex:1 1 auto;max-width:460px;display:flex;align-items:center;gap:10px;
  padding:9px 14px;color:var(--mist);font-size:.86rem;
  background:rgba(4,18,31,.72);box-shadow:inset 0 0 0 1px var(--edge);
  clip-path:var(--cutpoly-sm);
  transition:color .18s ease,box-shadow .18s ease;
}
.searchlink:hover{color:var(--ice);box-shadow:inset 0 0 0 1px var(--gold)}
.searchlink__ico{position:relative;flex:0 0 auto;width:11px;height:11px;border:1.5px solid var(--pulse);border-radius:50%}
.searchlink__ico::after{content:"";position:absolute;right:-4px;bottom:-3px;width:6px;height:1.5px;background:var(--pulse);transform:rotate(45deg)}
.searchlink__text{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.headbar__cta{flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:9px;flex:0 0 auto;
  padding:9px 12px;color:var(--ice);
  box-shadow:inset 0 0 0 1px var(--edge);clip-path:var(--cutpoly-sm);
  transition:color .18s ease,box-shadow .18s ease;
}
.nav-toggle:hover{color:var(--gold);box-shadow:inset 0 0 0 1px var(--gold)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:1.5px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle__text{font-size:.8rem;letter-spacing:.1em}
.site-head[data-nav-open] .nav-toggle__bars span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.site-head[data-nav-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-head[data-nav-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

/* --- 平板微调 --- */
@media (max-width:1040px) and (min-width:821px){
  :root{--rail-w:84px}
  .rail__label{font-size:.78rem;letter-spacing:.06em}
}

/* --- 移动端：顶部检索条 + 底部抽屉 --- */
@media (max-width:820px){
  :root{--rail-w:0px;--bar-h:58px}
  .skip-link{left:0}
  body{padding-left:0}

  .rail{position:static;display:block;width:auto;height:0;padding:0;border:0;background:none}
  .rail__brand,.rail__foot{display:none}

  .rail__nav{
    position:fixed;top:0;left:0;bottom:0;z-index:80;
    width:min(84vw,320px);
    padding:calc(var(--bar-h) + 18px) 0 28px;
    background:var(--night);border-right:var(--line);
    overflow-y:auto;
    transform:translateX(-104%);
    transition:transform .26s cubic-bezier(.4,0,.2,1);
  }
  .rail__nav[data-open]{transform:translateX(0)}
  .rail__nav-title{display:block;padding:0 22px 14px;color:var(--gold)}
  .rail__link{padding:14px 22px 14px 24px}
  .rail__label{font-size:.98rem;letter-spacing:.08em}
  .rail__idx{font-size:.68rem}
  .rail__cta{
    display:flex;align-items:center;justify-content:center;
    margin:20px 22px 0;padding:15px;background:var(--gold);color:#08151F;
    font-weight:800;letter-spacing:.08em;clip-path:var(--cutpoly-sm);
  }
  .rail__progress{display:none}

  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:65;
    background:rgba(4,18,31,.66);opacity:0;pointer-events:none;
    transition:opacity .22s ease;
  }
  .site-head[data-nav-open] .nav-scrim{opacity:1;pointer-events:auto}

  .headbar{left:0;background:var(--night)}
  .site-head[data-nav-open] .headbar{z-index:70}
  .headbar__inner{gap:12px;padding:0 14px}
  .headbar__brand{display:inline-flex}
  .headbar__cta{display:none}
  .searchlink{max-width:none;padding:8px 12px;font-size:.8rem}
  .nav-toggle{display:inline-flex}
}

@media (max-width:400px){
  .headbar__brand{font-size:.92rem}
  .searchlink__text{font-size:.76rem}
}

/* ==========================================================================
   19. 共享页脚
   ========================================================================== */
.site-foot{margin-top:clamp(48px,7vw,96px);background:var(--night);border-top:var(--line);padding:clamp(36px,5vw,64px) 0 26px}
.foot__grid{display:grid;grid-template-columns:minmax(0,5fr) repeat(3,minmax(0,3fr));gap:clamp(20px,3vw,40px)}
.foot__mark{display:block;font-size:1.35rem;font-weight:900;letter-spacing:.06em;color:var(--ice)}
.foot__en{display:block;margin-top:6px;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.3em;color:var(--edge)}
.foot__line{margin-top:16px;max-width:34ch;font-size:.84rem;line-height:1.7;color:var(--mist)}
.foot__title{margin-bottom:14px;font-family:var(--font-mono);font-size:.72rem;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--gold)}
.foot__list{display:flex;flex-direction:column;gap:9px}
.foot__list a{display:inline-block;font-size:.88rem;color:var(--mist);transition:color .16s ease,transform .16s ease}
.foot__list a:hover{color:var(--ice);transform:translateX(3px)}
.foot__meta{
  margin-top:clamp(28px,4vw,48px);padding-top:20px;border-top:var(--line-soft);
  display:flex;flex-wrap:wrap;gap:8px 24px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;color:var(--mist);
}
.foot__meta-item{display:inline-flex;align-items:center;gap:.4em}

@media (max-width:900px){
  .foot__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot__brand{grid-column:span 2}
}
@media (max-width:560px){
  .foot__grid{grid-template-columns:minmax(0,1fr)}
  .foot__brand{grid-column:span 1}
  .foot__meta{flex-direction:column;gap:6px}
}

/* ==========================================================================
   20. 无障碍：减弱动效
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  html[data-reveal="on"] [data-reveal]{opacity:1!important;transform:none!important}
  .band__item:hover,.btn:hover,.foot__list a:hover{transform:none}
}