/* ============================================================
   米兰看台 · 共享样式 /assets/site.css
   奶油底 + 深棕黑 + 米兰红 + 电光蓝 + 荧光绿反馈
   ============================================================ */

:root{
  --cream:#F3EDE2;
  --ink:#16110F;
  --red:#C8102E;
  --wine:#7A0C1E;
  --blue:#2E5BFF;
  --silver:#C6CAD2;
  --neon:#B6FF3B;
  --orange:#E2572B;
  --gray:#6B6560;
  --cinema:#0E1013;

  --rule:rgba(22,17,15,.14);
  --cream-dim:rgba(243,237,226,.58);
  --cream-line:rgba(243,237,226,.18);

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

  --wrap:1280px;
  --gutter:28px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --ticker-gap:56px;
  --rail-h:36px;
  --main-h:84px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}

body{
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}

/* ---------- 容器 / 节奏 ---------- */
.container{
  width:min(var(--wrap),100% - var(--gutter) * 2);
  margin-inline:auto;
}
.section{padding-block:clamp(56px,9vw,120px)}
.section--tight{padding-block:clamp(30px,5vw,64px)}

.editorial-grid{
  display:grid;
  grid-template-columns:minmax(0,22%) minmax(0,1fr);
  gap:clamp(20px,4vw,64px);
  align-items:start;
}
.note-rail{
  position:sticky;
  top:calc(var(--main-h) + 28px);
  display:flex;
  flex-direction:column;
  gap:20px;
}

/* ---------- 排版元件 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--red);
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--red)}
.index-num{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--orange);font-variant-numeric:tabular-nums;
}
.annotation{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  line-height:1.9;color:var(--gray);text-transform:uppercase;
}
.annotation--vertical{
  writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.32em;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gray);
  padding:4px 10px;border:1px solid var(--silver);
}
.tag--red{border-color:rgba(200,16,46,.45);color:var(--red)}
.rule-scale{
  height:12px;color:var(--ink);opacity:.32;
  background-image:repeating-linear-gradient(90deg,currentColor 0 1px,transparent 1px 14px);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;letter-spacing:.04em;line-height:1;
  padding:14px 24px;border:1px solid var(--ink);
  background:transparent;color:var(--ink);text-align:center;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn--primary{
  background:var(--red);border-color:var(--red);color:#fff;
  padding-right:32px;
  clip-path:polygon(0 0,100% 0,calc(100% - 16px) 100%,0 100%);
}
.btn--primary:hover{background:var(--wine);border-color:var(--wine)}
.btn--outline:hover{background:var(--ink);color:var(--cream)}
.btn--ghost{border-color:rgba(243,237,226,.42);color:var(--cream)}
.btn--ghost:hover{border-color:var(--neon);color:var(--neon)}

/* ---------- 面包屑 / 正文 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--gray);
}
.breadcrumb a:hover{color:var(--red)}
.breadcrumb__sep{color:var(--orange)}

.prose{max-width:66ch;font-size:17px;line-height:1.8}
.prose > * + *{margin-top:1.15em}
.prose h2{font-size:26px;font-weight:800;letter-spacing:-.01em;margin-top:2em}
.prose h3{font-size:20px;font-weight:700;margin-top:1.6em}
.prose li{position:relative;padding-left:20px}
.prose li + li{margin-top:.6em}
.prose li::before{
  content:"";position:absolute;left:0;top:.75em;
  width:8px;height:1px;background:var(--orange);
}
.prose a{color:var(--blue);border-bottom:1px solid rgba(46,91,255,.35)}
.prose a:hover{border-bottom-color:var(--blue)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;
  background:var(--cinema);border:1px solid var(--silver);
}
.media-frame img{
  width:100%;height:100%;object-fit:cover;
  filter:contrast(1.08) saturate(.96);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 3px);
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__cap{
  margin-top:10px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.14em;color:var(--gray);
}

/* ---------- 章节高亮 / 显现 ---------- */
[data-chapter]{
  border-left:3px solid transparent;
  transition:border-color .3s var(--ease);
  scroll-margin-top:calc(var(--main-h) + 24px);
}
[data-chapter].is-current{border-left-color:var(--red)}
[data-chapter].is-current .index-num{color:var(--red)}

[data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
[data-reveal].is-revealed{opacity:1;transform:none}

.chapter-nav{display:flex;flex-direction:column;gap:12px}
.chapter-nav__link{
  display:flex;align-items:baseline;gap:12px;
  font-size:13px;color:var(--gray);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.chapter-nav__link:hover{color:var(--ink);transform:translateX(4px)}
.chapter-nav__link.is-active{color:var(--red)}
.chapter-nav__link.is-active .index-num{color:var(--red)}

/* ---------- 阅读进度 ---------- */
.read-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--red),var(--orange));
  z-index:300;pointer-events:none;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:16px;top:-72px;z-index:400;
  background:var(--ink);color:var(--cream);
  padding:11px 20px;font-size:14px;letter-spacing:.06em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ============================================================
   头部：双层信息导航
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--cream);
  border-bottom:1px solid var(--rule);
}

.header-rail{
  position:relative;z-index:140;
  height:var(--rail-h);overflow:hidden;
  background:var(--ink);color:var(--cream);
  transition:height .3s var(--ease),opacity .25s var(--ease);
}
.rail-inner{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:24px;height:var(--rail-h);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
}
.rail-brand{white-space:nowrap;font-weight:700;letter-spacing:.18em}
.rail-brand::before{
  content:"";display:inline-block;width:6px;height:6px;margin-right:10px;
  background:var(--red);transform:translateY(-1px) skewX(-14deg);
}
.rail-ticker{
  overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
}
.rail-ticker__track{
  display:flex;width:max-content;
  animation:railscroll 42s linear infinite;
}
.rail-ticker__seq{display:flex;white-space:nowrap}
.rail-ticker__item{
  position:relative;padding-right:var(--ticker-gap);
  color:var(--silver);font-size:11.5px;letter-spacing:.12em;
}
.rail-ticker__item::after{
  content:"";position:absolute;right:calc(var(--ticker-gap) / 2);top:50%;
  width:3px;height:3px;background:var(--orange);
  transform:translateY(-50%) rotate(45deg);
}
@keyframes railscroll{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}
.rail-right{display:flex;align-items:center;gap:18px;white-space:nowrap}
.rail-mail{font-size:11px;letter-spacing:.06em;color:var(--silver)}
.rail-ask{
  font-size:12px;letter-spacing:.16em;color:var(--neon);
  border-bottom:1px solid rgba(182,255,59,.42);
}
.rail-ask:hover{border-bottom-color:var(--neon)}

.header-main__inner{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:clamp(14px,2.4vw,40px);
  min-height:var(--main-h);
  transition:min-height .3s var(--ease);
}
.site-header.is-condensed .header-rail{height:0;opacity:0}
.site-header.is-condensed .header-main__inner{min-height:64px}

.brand-mark{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark__badge{
  display:grid;place-items:center;flex:none;
  width:38px;height:38px;background:var(--ink);color:var(--cream);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-mark__text{display:flex;flex-direction:column;line-height:1.2}
.brand-mark__name{font-size:19px;font-weight:800;letter-spacing:.08em}
.brand-mark__sub{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--gray);
}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  position:relative;z-index:130;
  padding:9px 14px;border:1px solid var(--ink);
  font-size:13px;font-weight:700;letter-spacing:.16em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:var(--ink);transition:background .2s var(--ease)}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"]{border-color:var(--red);color:var(--red)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{background:var(--red);transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{background:var(--red);transform:translateY(-5px) rotate(-45deg)}

.site-nav{display:flex;justify-content:flex-end}
.site-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:wrap;justify-content:flex-end}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 12px;font-size:15px;font-weight:700;letter-spacing:.04em;
  transition:color .2s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--red);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.site-nav__link:hover{color:var(--red)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--red)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]::before{
  content:"";position:absolute;left:2px;top:50%;
  width:5px;height:5px;background:var(--orange);
  transform:translateY(-50%) rotate(45deg);
}

.nav-panel{
  position:absolute;top:calc(100% + 4px);left:6px;min-width:236px;z-index:12;
  padding:10px;background:var(--cream);
  border:1px solid var(--ink);
  box-shadow:0 20px 42px -26px rgba(22,17,15,.55);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.nav-panel::before{
  content:"";position:absolute;top:-6px;left:20px;
  width:10px;height:10px;background:var(--cream);
  border-left:1px solid var(--ink);border-top:1px solid var(--ink);
  transform:rotate(45deg);
}
.site-nav__item--has-panel:hover .nav-panel,
.site-nav__item--has-panel:focus-within .nav-panel{
  opacity:1;visibility:visible;transform:translateY(0);
}
.nav-panel__item + .nav-panel__item{border-top:1px solid var(--rule)}
.nav-panel__link{
  display:flex;align-items:center;gap:12px;
  padding:11px 12px;font-size:14px;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.nav-panel__link:hover{
  background:rgba(200,16,46,.07);color:var(--red);transform:translateX(4px);
}
.nav-panel__index{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--orange);
}
.nav-panel__item--key .nav-panel__link{box-shadow:inset 3px 0 0 var(--blue)}
.nav-panel__item--key .nav-panel__index{color:var(--blue)}

.site-nav__cta{display:none}

.header-actions{display:flex;align-items:center;gap:16px;flex:none}
.header-cta{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 30px 13px 20px;
  background:var(--red);color:#fff;
  font-size:15px;font-weight:700;letter-spacing:.04em;white-space:nowrap;
  clip-path:polygon(0 0,100% 0,calc(100% - 18px) 100%,0 100%);
  transition:background .2s var(--ease);
}
.header-cta:hover{background:var(--wine)}
.live-dot{
  flex:none;width:8px;height:8px;border-radius:50%;
  background:var(--neon);box-shadow:0 0 0 3px rgba(182,255,59,.22);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(182,255,59,.22)}
  50%{box-shadow:0 0 0 6px rgba(182,255,59,.06)}
}

/* ============================================================
   页脚：四栏不对称 + 球门线坐标
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--cream);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,rgba(243,237,226,.05) 1px,transparent 1px);
  background-size:64px 100%;
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.9fr 1fr 1fr 1.1fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(48px,7vw,84px) 40px;
}
.footer-brand__name{font-size:26px;font-weight:800;letter-spacing:.08em}
.footer-brand__domain{
  margin-top:8px;font-family:var(--font-mono);font-size:13px;
  letter-spacing:.04em;color:var(--silver);
}
.footer-filing{
  margin-top:6px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.06em;color:var(--cream-dim);
}
.footer-brand__note{
  margin-top:18px;max-width:34ch;font-size:14px;line-height:1.85;color:var(--cream-dim);
}
.footer-col__title{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  color:var(--orange);margin-bottom:18px;
}
.footer-col__title::after{content:"";flex:1;height:1px;background:var(--cream-line)}
.footer-list li + li{margin-top:12px}
.footer-link{
  font-size:14.5px;color:var(--cream);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:var(--neon);border-bottom-color:var(--neon)}
.footer-subscribe{
  border-left:1px solid var(--cream-line);
  padding-left:clamp(16px,2vw,28px);
}
.footer-subscribe__title{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  color:var(--cream);
}
.footer-subscribe__note{
  margin-top:10px;font-size:13.5px;line-height:1.8;color:var(--cream-dim);
}
.footer-subscribe .btn{margin-top:20px}

.footer-contact{
  position:relative;display:flex;flex-wrap:wrap;align-items:baseline;
  gap:8px 28px;padding-block:22px;
  border-top:1px solid var(--cream-line);
  font-family:var(--font-mono);font-size:13px;color:var(--silver);
}
.footer-contact__note{font-family:var(--font-sans);font-size:13px;color:var(--cream-dim)}

.footer-goalline{
  position:relative;display:flex;justify-content:space-between;
  height:28px;padding-inline:var(--gutter);
  border-top:1px solid rgba(243,237,226,.22);
  background-image:repeating-linear-gradient(90deg,rgba(243,237,226,.14) 0 1px,transparent 1px 44px);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;
  color:rgba(243,237,226,.42);
}
.footer-goalline span{padding-top:8px}

.footer-meta{
  position:relative;display:flex;flex-wrap:wrap;justify-content:space-between;
  gap:12px;padding-block:18px 26px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  color:var(--cream-dim);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1200px){
  .site-nav__link{padding:10px 9px;font-size:14px}
  .header-cta{font-size:14px;padding:12px 26px 12px 18px}
}

@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .header-main__inner{
    grid-template-columns:auto auto;
    justify-content:space-between;
  }
  .header-actions{display:none}
  .site-nav{
    position:fixed;top:calc(var(--rail-h) + var(--main-h));left:0;right:0;bottom:0;
    display:block;padding:18px var(--gutter) 56px;
    background:var(--cream);border-top:1px solid var(--rule);
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .site-nav__list{display:block}
  .site-nav__item{border-bottom:1px solid var(--rule)}
  .site-nav__link{display:flex;justify-content:space-between;width:100%;padding:16px 4px;font-size:18px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]::before{left:-2px}
  .site-nav__item--has-panel .nav-panel{
    position:static;min-width:0;padding:4px 0 12px;
    border:0;border-top:1px dashed var(--rule);box-shadow:none;
    opacity:1;visibility:visible;transform:none;
  }
  .nav-panel::before{display:none}
  .nav-panel__link{padding:11px 12px 11px 22px;font-size:15px}
  .site-nav__cta{display:block;margin-top:26px}
  .site-nav__cta .btn{width:100%}
  .site-nav__cta .btn{border-radius:0}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-subscribe{border-left:0;padding-left:0}
}

@media (max-width:860px){
  .editorial-grid{grid-template-columns:1fr}
  .note-rail{position:static;flex-direction:row;flex-wrap:wrap;gap:16px}
  .annotation--vertical{writing-mode:horizontal-tb;letter-spacing:.18em}
}

@media (max-width:700px){
  :root{--gutter:20px;--main-h:72px}
  body{font-size:16px}
  .rail-ticker{display:none}
  .rail-inner{grid-template-columns:1fr auto;gap:12px}
  .rail-mail{display:none}
  .brand-mark__sub{display:none}
  .brand-mark__badge{width:34px;height:34px}
  .brand-mark__name{font-size:17px}
  .footer-goalline{font-size:9px}
  .footer-contact{font-size:12px}
}

@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-meta{flex-direction:column;gap:6px}
  .header-cta{font-size:13px;padding:12px 24px 12px 16px}
  .prose{font-size:16px}
}

/* ---------- 可访问性：减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .rail-ticker__track{animation:none}
  .live-dot{animation:none}
  [data-reveal]{opacity:1;transform:none}
}