/* ============================================================
   安博 · 赛季手账  /assets/site.css
   共享外壳：重置、变量、中文排版、页头、页脚、通用组件
   ============================================================ */

:root{
  --c-cyan:#0F3B3A;
  --c-night:#082726;
  --c-sand:#F3E8D6;
  --c-sand-2:#D8C4A4;
  --c-rock:#6E6A62;
  --c-moss:#4E6B4A;
  --c-red:#D2402B;
  --c-whistle:#E9B21F;
  --c-clay:#B4623A;
  --c-ink:#1E1B16;

  --shell:1280px;
  --gutter:clamp(16px,4vw,44px);
  --line-rock:rgba(110,106,98,.32);
  --line-cyan:rgba(15,59,58,.22);
  --line-sand:rgba(243,232,214,.22);

  --font-display:"Arial Narrow","Helvetica Neue Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --scroll:0;
  --cut:20px;
  --ease:cubic-bezier(.32,.72,.28,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;min-height:100%;
  font-family:var(--font-body);font-size:16.5px;line-height:1.75;color:var(--c-ink);
  background-color:var(--c-sand);
  background-image:
    radial-gradient(120% 90% at 50% -20%,rgba(15,59,58,.10),transparent 62%),
    radial-gradient(70% 60% at 105% 108%,rgba(180,98,58,.12),transparent 60%),
    linear-gradient(rgba(110,106,98,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(110,106,98,.12) 1px,transparent 1px);
  background-size:auto,auto,32px 32px,32px 32px;
}
img,svg,video{max-width:100%;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.14;letter-spacing:.01em;margin:0 0 .5em;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.2em;}
a{color:var(--c-cyan);}
button{font:inherit;}
:focus-visible{outline:2px solid var(--c-whistle);outline-offset:2px;}
::selection{background:rgba(233,178,31,.55);color:var(--c-ink);}
#main-content{scroll-margin-top:130px;}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:14px;top:-70px;z-index:120;
  padding:11px 18px;background:var(--c-whistle);color:var(--c-ink);
  font:700 13px/1 var(--font-mono);letter-spacing:.14em;text-decoration:none;
  border-radius:0 0 6px 6px;transition:top .18s ease;
}
.skip-link:focus{top:0;}

/* ---------- 刊头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-sand);
  border-bottom:1px solid var(--line-cyan);
  box-shadow:0 1px 0 rgba(243,232,214,.6) inset;
}
.site-header::after{
  content:"";position:absolute;left:0;bottom:-1px;height:2px;
  width:calc(var(--scroll) * 100%);
  background:linear-gradient(90deg,var(--c-whistle),var(--c-red));
  pointer-events:none;transition:width .12s linear;
}
.header-rail{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:var(--c-cyan);color:var(--c-sand);
  padding:6px var(--gutter);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;
}
.rail-coord{color:rgba(243,232,214,.62);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.rail-actions{display:flex;align-items:center;flex-shrink:0;}
.rail-link{
  color:var(--c-sand);text-decoration:none;
  padding:2px 12px;letter-spacing:.1em;white-space:nowrap;
  border-left:1px solid rgba(243,232,214,.24);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.rail-link:first-child{border-left:0;}
.rail-link:hover{background:rgba(233,178,31,.16);color:#fff;}
.rail-link--accent{color:var(--c-whistle);}
.rail-link--accent:hover{background:rgba(210,64,43,.22);color:var(--c-whistle);}

.header-mast{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  max-width:var(--shell);margin:0 auto;
  padding:18px var(--gutter) 12px;
}
.nav-toggle{
  display:none;grid-column:1;justify-self:start;align-items:center;gap:9px;
  padding:10px 14px;border:0;cursor:pointer;
  background:var(--c-cyan);color:var(--c-sand);
  font:600 13px/1 var(--font-body);letter-spacing:.12em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
}
.nav-toggle__bars{display:block;width:18px;height:2px;background:var(--c-whistle);box-shadow:0 -6px 0 var(--c-whistle),0 6px 0 var(--c-whistle);transition:transform .18s var(--ease);}
.nav-toggle__text{white-space:nowrap;}
.nav-toggle:hover .nav-toggle__bars{transform:translateX(3px);}

.brand-wrap{grid-column:2;justify-self:center;text-align:center;padding:0 8px;}
.brand{
  display:inline-flex;align-items:baseline;gap:12px;
  text-decoration:none;color:var(--c-cyan);
  font-family:var(--font-display);font-weight:800;letter-spacing:.02em;
}
.brand__mark{font-size:clamp(24px,3.4vw,40px);line-height:1;}
.brand__rule{width:26px;height:3px;background:var(--c-red);transform:translateY(-4px);}
.brand__name{font-size:clamp(20px,2.6vw,30px);line-height:1;color:var(--c-ink);}
.brand__sub{
  margin:9px 0 0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  color:var(--c-rock);text-align:center;
}
.header-rail,.header-mast,.brand__mark,.brand__name{
  transition:padding .22s var(--ease),font-size .22s var(--ease),opacity .18s var(--ease);
}
.site-header.is-compact .header-rail{padding-top:3px;padding-bottom:3px;font-size:10.5px;}
.site-header.is-compact .header-mast{padding-top:7px;padding-bottom:7px;}
.site-header.is-compact .brand__mark{font-size:22px;}
.site-header.is-compact .brand__name{font-size:18px;}
.site-header.is-compact .brand__sub{display:none;}

/* ---------- 导航 ---------- */
.site-nav{
  background:linear-gradient(180deg,rgba(216,196,164,.42),rgba(216,196,164,0));
  border-top:1px solid var(--line-rock);
}
.site-nav__list{
  display:flex;flex-wrap:wrap;justify-content:center;align-items:stretch;
  list-style:none;margin:0 auto;padding:0 var(--gutter);max-width:var(--shell);
}
.site-nav__item{border-left:1px solid var(--line-rock);}
.site-nav__item:last-child{border-right:1px solid var(--line-rock);}
.site-nav__item > a{
  position:relative;display:block;
  padding:12px clamp(14px,2.4vw,30px);
  font-size:14.5px;font-weight:600;letter-spacing:.05em;
  color:var(--c-cyan);text-decoration:none;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.site-nav__item > a::after{
  content:"";position:absolute;left:clamp(14px,2.4vw,30px);right:clamp(14px,2.4vw,30px);bottom:7px;height:2px;
  background:var(--c-whistle);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.site-nav__item > a:hover{color:var(--c-ink);background:rgba(233,178,31,.12);}
.site-nav__item > a:hover::after{transform:scaleX(1);}
.site-nav__item > a[aria-current="page"]{color:var(--c-ink);background:rgba(243,232,214,.85);}
.site-nav__item > a[aria-current="page"]::after{transform:scaleX(1);background:var(--c-red);}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(56px,9vw,120px);
  background:var(--c-night);color:var(--c-sand);
}
.site-footer::before{
  content:"";display:block;height:6px;
  background:repeating-linear-gradient(135deg,var(--c-clay) 0 12px,var(--c-whistle) 12px 22px,var(--c-cyan) 22px 36px);
}
.footer-top{
  display:grid;grid-template-columns:minmax(240px,1fr) 1.9fr;
  gap:clamp(24px,4vw,64px);
  max-width:var(--shell);margin:0 auto;
  padding:clamp(32px,5vw,64px) var(--gutter) 22px;
}
.footer-brand__mark{
  display:inline-block;text-decoration:none;
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(22px,3vw,32px);letter-spacing:.03em;color:var(--c-sand);
  border-bottom:2px solid transparent;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.footer-brand__mark:hover{color:var(--c-whistle);border-bottom-color:var(--c-whistle);}
.footer-brand__sub{margin:12px 0 0;font-size:14px;letter-spacing:.05em;color:rgba(243,232,214,.66);}
.footer-axis{
  position:relative;height:26px;margin-top:20px;
  border-top:1px solid rgba(243,232,214,.24);
}
.footer-axis::before{
  content:"";position:absolute;left:0;right:0;top:0;height:9px;
  background-image:repeating-linear-gradient(90deg,rgba(233,178,31,.55) 0 1px,transparent 1px 20px);
}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,3vw,40px);}
.footer-col__title{
  margin:0 0 14px;padding-bottom:9px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:600;letter-spacing:.2em;
  color:var(--c-whistle);text-transform:uppercase;
  border-bottom:1px solid rgba(243,232,214,.22);
}
.footer-col__list{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.footer-col__list a{
  font-size:15px;color:rgba(243,232,214,.82);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-col__list a:hover{color:var(--c-whistle);border-bottom-color:rgba(233,178,31,.6);}
.footer-contact{
  max-width:var(--shell);margin:0 auto;padding:20px var(--gutter);
  border-top:1px solid rgba(243,232,214,.16);
}
.footer-contact__line{
  margin:0;font-family:var(--font-mono);font-size:13.5px;letter-spacing:.04em;
  color:var(--c-sand);word-break:break-word;
}
.footer-note{margin:9px 0 0;font-size:13.5px;line-height:1.7;max-width:66ch;color:rgba(243,232,214,.6);}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 20px;
  max-width:var(--shell);margin:0 auto;padding:16px var(--gutter) 30px;
  border-top:1px solid rgba(243,232,214,.16);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.11em;
  color:rgba(243,232,214,.55);
}
.footer-legal p{margin:0;}

/* ---------- 布局基础 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter);}
.section{padding:clamp(36px,6vw,84px) 0;}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(12px,2vw,24px);}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-6{grid-column:span 6;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--c-rock);
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--c-red);}
.coord-note{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.26em;text-transform:uppercase;
  color:rgba(110,106,98,.9);
  writing-mode:vertical-rl;
}
.data-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.prose{max-width:34em;font-size:16.5px;line-height:1.8;}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin:1.7em 0 .6em;color:var(--c-cyan);}
.prose h3{font-size:clamp(18px,2vw,22px);margin:1.4em 0 .5em;color:var(--c-cyan);}
.prose ul{padding-left:1.1em;}
.prose li{margin-bottom:.4em;}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--c-rock);}
.breadcrumb__list{display:flex;flex-wrap:wrap;list-style:none;margin:0;padding:0;}
.breadcrumb__list li{display:flex;align-items:center;}
.breadcrumb__list li + li::before{content:"/";margin:0 10px;color:rgba(110,106,98,.6);}
.breadcrumb__list a{color:var(--c-cyan);text-decoration:none;border-bottom:1px solid rgba(15,59,58,.3);}
.breadcrumb__list a:hover{border-bottom-color:var(--c-whistle);}

/* ---------- 面板 / 按钮 / 标签 ---------- */
.panel{
  position:relative;
  background:#F7EFE2;
  border:1px solid var(--line-cyan);
  padding:clamp(18px,2.6vw,30px);
}
.panel--cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%);
}
.panel--cut::before{
  content:"";position:absolute;right:1px;bottom:0;width:calc(var(--cut) * 1.42);height:1.5px;
  background:var(--c-rock);transform-origin:100% 50%;transform:rotate(-45deg) translate(-2px,-2px);
  transition:background .18s var(--ease);
}
.panel--cut:hover::before{background:var(--c-red);}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;border:1px solid var(--c-cyan);
  background:var(--c-cyan);color:var(--c-sand);
  font:600 15px/1 var(--font-body);letter-spacing:.06em;text-decoration:none;
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{background:var(--c-night);color:#fff;}
.btn--ghost{background:transparent;color:var(--c-cyan);border-color:rgba(15,59,58,.5);}
.btn--ghost:hover{background:rgba(15,59,58,.09);color:var(--c-ink);}
.btn--signal{background:var(--c-red);border-color:var(--c-red);color:#fff;}
.btn--signal:hover{background:#b2331f;color:#fff;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;border:1px solid rgba(15,59,58,.35);
  background:rgba(216,196,164,.42);color:var(--c-cyan);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
}
.tag--moss{background:rgba(78,107,74,.14);border-color:rgba(78,107,74,.5);color:#33502f;}
.tag--red{background:rgba(210,64,43,.14);border-color:rgba(210,64,43,.5);color:#a92f1d;}
.tag--whistle{background:rgba(233,178,31,.22);border-color:rgba(233,178,31,.72);color:#6b4f04;}

/* ---------- 编号锚点列表 ---------- */
.list-index{list-style:none;margin:0;padding:0;border-top:1px solid var(--line-rock);}
.list-index__item{
  position:relative;
  display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:14px;align-items:baseline;
  padding:14px 10px 14px 16px;
  border-bottom:1px solid rgba(110,106,98,.24);
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.list-index__item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--c-whistle);transform:scaleY(0);transform-origin:top;
  transition:transform .22s var(--ease);
}
.list-index__item:hover{transform:translateX(2px);background:rgba(216,196,164,.32);}
.list-index__item:hover::before{transform:scaleY(1);}
.list-index__no{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--c-rock);
}
.list-index__item:hover .list-index__no{color:var(--c-cyan);}

/* ---------- 过滤条 ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  padding:12px 14px;margin-bottom:18px;
  border:1px dashed rgba(15,59,58,.35);
  background:rgba(243,232,214,.6);
}
.filter-bar__input{
  flex:1 1 220px;min-width:0;
  padding:10px 12px;font:inherit;font-size:15px;
  color:var(--c-ink);background:var(--c-sand);
  border:1px solid rgba(15,59,58,.35);
}
.filter-bar__input::placeholder{color:rgba(110,106,98,.75);}
.filter-bar__count{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;color:var(--c-rock);
}
[data-filter-item][hidden]{display:none !important;}

/* ---------- 图片画框 ---------- */
.figure-frame{
  position:relative;overflow:hidden;
  aspect-ratio:4 / 3;
  background:var(--c-sand-2);
  border:1px solid var(--line-cyan);
}
.figure-frame > img,
.figure-frame > svg{display:block;width:100%;height:100%;object-fit:cover;}
.figure-frame--wide{aspect-ratio:16 / 9;}
.figure-frame--tall{aspect-ratio:3 / 4;}
.figure-frame--square{aspect-ratio:1 / 1;}

/* ---------- 斜切分隔带 ---------- */
.slash-divider{
  height:14px;margin:clamp(24px,4vw,48px) 0;
  border-top:1px solid var(--line-rock);
  border-bottom:1px solid var(--line-rock);
  background-image:repeating-linear-gradient(112deg,var(--c-clay) 0 6px,transparent 6px 22px);
  opacity:.62;
}

/* ---------- 显现 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .footer-top{grid-template-columns:1fr;gap:30px;}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .header-mast{padding-top:14px;padding-bottom:12px;}
  .site-nav{
    max-height:0;overflow:hidden;visibility:hidden;opacity:0;
    transition:max-height .28s var(--ease),opacity .2s var(--ease),visibility .2s linear;
  }
  .site-nav[data-open]{
    max-height:70vh;overflow-y:auto;visibility:visible;opacity:1;
  }
  .site-nav__list{flex-direction:column;padding:0 var(--gutter);}
  .site-nav__item{border-left:0;border-bottom:1px solid rgba(110,106,98,.24);}
  .site-nav__item:last-child{border-right:0;border-bottom:0;}
  .site-nav__item > a{padding:15px 0 15px 20px;font-size:16px;}
  .site-nav__item > a::after{left:20px;right:auto;bottom:10px;width:26px;}
  .grid-12 > [class*="span-"]{grid-column:1 / -1;}
  .list-index__item{grid-template-columns:44px minmax(0,1fr);}
}
@media (max-width:640px){
  body{font-size:16px;}
  .rail-coord{display:none;}
  .header-rail{justify-content:flex-end;}
  .rail-link{padding:2px 10px;font-size:11px;letter-spacing:.08em;}
  .brand{gap:8px;}
  .brand__rule{width:18px;height:2px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-legal{flex-direction:column;gap:6px;}
  .footer-contact__line{font-size:12.5px;letter-spacing:.02em;}
}

/* ---------- 动效与对比偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
  .site-header::after{transition:none;}
}