/* =========================================================
   KOK看台 — /assets/site.css
   共享外壳：reset / 变量 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-night:#0B1B2B;
  --stand-blue:#102A43;
  --paper-cream:#F2E8D5;
  --ink-brown:#1A1410;
  --flash-orange:#FF6B1A;
  --ember-red:#E23E1F;
  --signal-green:#C8FF3D;
  --mist-blue:#8AA0B4;
  --paper-shade:#4A3A2A;
  --chalk-white:#FDFCF7;

  --font-display:"Oswald","Arial Narrow","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Noto Sans Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --font-serif:"Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;

  --shell:1440px;
  --gutter:24px;
  --bw:3px;
  --shadow-hard:8px 8px 0 var(--ink-brown);
  --shadow-night:8px 8px 0 #040A12;
  --ease:cubic-bezier(.2,.8,.2,1);
}

/* ---------- 2. Reset 与基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background-color:var(--ink-night);
  background-image:repeating-linear-gradient(115deg, rgba(138,160,180,.05) 0 1px, transparent 1px 92px);
  color:var(--paper-cream);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  word-break:break-word;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin:0 0 .5em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.3em}
img,svg{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
[hidden]{display:none !important}

a{color:var(--signal-green);text-decoration:none}
a:hover{color:var(--chalk-white)}

::selection{background:var(--signal-green);color:var(--ink-brown)}

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

::-webkit-scrollbar{width:12px;height:12px}
::-webkit-scrollbar-track{background:var(--stand-blue)}
::-webkit-scrollbar-thumb{background:var(--paper-shade);border:3px solid var(--stand-blue)}
::-webkit-scrollbar-thumb:hover{background:var(--flash-orange)}

/* ---------- 3. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:0;
  left:0;
  z-index:200;
  padding:12px 20px;
  background:var(--signal-green);
  color:var(--ink-brown);
  font:700 14px/1 var(--font-mono);
  letter-spacing:.06em;
  border:3px solid var(--ink-brown);
  box-shadow:6px 6px 0 var(--ink-brown);
  transform:translateY(-130%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:var(--ink-brown)}

/* ---------- 4. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.stack--offset{display:grid;gap:32px}

/* ---------- 5. 头部：双层抬头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--stand-blue);
  border-bottom:var(--bw) solid var(--ink-brown);
}

/* 上层：品牌说明 + 工具 */
.masthead{
  position:relative;
  overflow:hidden;
  max-height:240px;
  background:var(--stand-blue);
  border-bottom:2px solid rgba(138,160,180,.3);
  transition:max-height .28s var(--ease), opacity .2s ease;
}
.masthead::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(115deg, rgba(255,107,26,.09) 0 2px, transparent 2px 24px);
  pointer-events:none;
}
.site-header[data-condensed] .masthead{
  max-height:0;
  opacity:0;
}

.masthead__inner{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:18px 28px;
  padding-block:18px;
}

.brand{
  display:flex;
  align-items:baseline;
  gap:14px;
  text-decoration:none;
  min-width:0;
}
.brand__name{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(22px,2.3vw,30px);
  line-height:1;
  letter-spacing:-.01em;
  color:var(--chalk-white);
}
.brand__name::after{
  content:"";
  display:inline-block;
  width:11px;
  height:11px;
  margin-left:10px;
  background:var(--flash-orange);
}
.brand__line{
  font:500 13px/1.5 var(--font-mono);
  letter-spacing:.03em;
  color:var(--mist-blue);
  white-space:nowrap;
}
.brand:hover .brand__name{color:var(--signal-green)}

.masthead__tools{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
}

/* 检索框 */
.finder{
  display:flex;
  align-items:center;
  gap:9px;
  padding:4px 10px;
  background:var(--ink-night);
  border:2px solid var(--paper-shade);
  transition:border-color .16s, box-shadow .16s;
}
.finder:focus-within{
  border-color:var(--signal-green);
  box-shadow:0 0 0 3px rgba(200,255,61,.18);
}
.finder__label{
  font:700 11px/1 var(--font-mono);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--flash-orange);
}
.finder__input{
  width:172px;
  padding:7px 2px;
  background:transparent;
  border:0;
  color:var(--chalk-white);
  font:500 13px/1.4 var(--font-mono);
  letter-spacing:.02em;
}
.finder__input::placeholder{color:var(--mist-blue)}
.finder__input:focus-visible{outline:none}
.finder__input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

/* 同步状态灯 */
.sync{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  font:500 12px/1.4 var(--font-mono);
  letter-spacing:.04em;
  color:var(--signal-green);
  white-space:nowrap;
}
.sync__dot{
  width:9px;
  height:9px;
  background:var(--signal-green);
  animation:syncPulse 1.8s ease-in-out infinite;
}
@keyframes syncPulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.42;transform:scale(.8)}
}

/* 下层：栏目 */
.site-nav{
  background:var(--ink-night);
}
.site-nav__inner{
  display:flex;
  align-items:center;
  gap:18px;
  padding-block:8px;
}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
  flex:1 1 auto;
  margin:0;
  padding:0;
  list-style:none;
}
.site-nav__list a{
  display:block;
  padding:11px 15px;
  font:600 14px/1 var(--font-mono);
  letter-spacing:.05em;
  color:var(--paper-cream);
  text-decoration:none;
  border:2px solid transparent;
  border-bottom:3px solid transparent;
  transition:color .16s, background .16s, border-color .16s;
}
.site-nav__list a:hover{
  color:var(--chalk-white);
  background:var(--stand-blue);
  border-bottom-color:var(--flash-orange);
}
.site-nav__list a[aria-current="page"]{
  background:var(--flash-orange);
  color:var(--ink-night);
  font-weight:700;
  border-color:var(--flash-orange);
}
.site-nav__note{
  margin:0;
  font:500 12px/1.4 var(--font-mono);
  letter-spacing:.03em;
  color:var(--mist-blue);
  white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:11px 14px;
  background:var(--stand-blue);
  color:var(--chalk-white);
  border:2px solid var(--paper-shade);
  font:600 13px/1 var(--font-mono);
  letter-spacing:.1em;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--flash-orange)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:20px;
  height:2px;
  background:var(--signal-green);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  background:var(--signal-green);
  transition:transform .2s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-nav[data-open] .nav-toggle__bars{background:transparent}
.site-nav[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-nav[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  background:var(--paper-cream);
  color:var(--ink-brown);
  border:var(--bw) solid var(--ink-brown);
  box-shadow:5px 5px 0 var(--ink-brown);
  font:700 14px/1.2 var(--font-mono);
  letter-spacing:.05em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .16s var(--ease), box-shadow .16s var(--ease), background .16s;
}
.btn:hover{
  color:var(--ink-brown);
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--ink-brown);
}
.btn:active{
  transform:translate(2px,2px);
  box-shadow:2px 2px 0 var(--ink-brown);
}
.btn--hot{background:var(--flash-orange)}
.btn--hot:hover{background:#FF7E38}
.btn--ghost{
  background:transparent;
  color:var(--paper-cream);
  border-color:var(--paper-cream);
  box-shadow:5px 5px 0 rgba(242,232,213,.3);
}
.btn--ghost:hover{
  color:var(--signal-green);
  border-color:var(--signal-green);
  box-shadow:7px 7px 0 rgba(200,255,61,.35);
}

/* ---------- 7. 编辑标记与标签 ---------- */
.sec-mark{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font:700 12px/1 var(--font-mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--flash-orange);
}
.sec-mark::before{
  content:"";
  width:28px;
  height:3px;
  background:var(--flash-orange);
}

.sec-title{
  margin:0 0 14px;
  padding-left:14px;
  border-left:6px solid var(--flash-orange);
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(28px,4vw,44px);
  line-height:1.15;
  letter-spacing:-.01em;
}

.tag{
  display:inline-block;
  padding:3px 9px;
  border:2px solid currentColor;
  font:700 11.5px/1.7 var(--font-mono);
  letter-spacing:.08em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag--orange{color:var(--flash-orange)}
.tag--green{color:var(--signal-green)}
.tag--red{color:var(--ember-red)}

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

.dot{
  display:inline-block;
  width:8px;
  height:8px;
  margin-right:8px;
  vertical-align:middle;
  background:var(--ember-red);
}

/* ---------- 8. 面板 ---------- */
.panel{
  position:relative;
  padding:26px clamp(18px,2.4vw,32px);
  background:var(--paper-cream);
  color:var(--ink-brown);
  border:var(--bw) solid var(--ink-brown);
  box-shadow:var(--shadow-hard);
}
.panel a{color:var(--ember-red)}
.panel a:hover{color:var(--ink-brown)}
.panel--dark{
  background:var(--stand-blue);
  color:var(--paper-cream);
  border-color:var(--paper-shade);
  box-shadow:var(--shadow-night);
}
.panel--dark a{color:var(--signal-green)}
.panel--dark a:hover{color:var(--chalk-white)}
.panel--slant{transform:rotate(-1.2deg)}

/* 入视口显现 */
.js-reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .24s var(--ease), transform .24s var(--ease);
}
.js-reveal.is-in{
  opacity:1;
  transform:none;
}

/* ---------- 9. 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--stand-blue);
  border:var(--bw) solid var(--ink-brown);
  box-shadow:var(--shadow-hard);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(1.06) contrast(1.05);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--slant{clip-path:polygon(0 0, 100% 5%, 100% 100%, 0 95%)}
.media__cap{
  position:absolute;
  left:0;
  bottom:0;
  max-width:100%;
  padding:8px 14px;
  background:var(--ink-brown);
  color:var(--paper-cream);
  font:500 12px/1.6 var(--font-mono);
  letter-spacing:.03em;
}

/* ---------- 10. 筛选条 ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding:12px;
  background:var(--stand-blue);
  border:var(--bw) solid var(--ink-brown);
  box-shadow:var(--shadow-night);
}
.filter-chip{
  padding:9px 14px;
  background:transparent;
  color:var(--paper-cream);
  border:2px solid var(--paper-shade);
  font:600 13px/1 var(--font-mono);
  letter-spacing:.05em;
  cursor:pointer;
  transition:background .16s, color .16s, border-color .16s, transform .12s var(--ease);
}
.filter-chip:hover{
  color:var(--chalk-white);
  border-color:var(--flash-orange);
  transform:translateX(3px);
}
.filter-chip[aria-pressed="true"]{
  background:var(--flash-orange);
  color:var(--ink-night);
  border-color:var(--flash-orange);
}

/* ---------- 11. 索引列表 ---------- */
.index-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:2px;
}
.index-item{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 14px;
  padding:12px 14px;
  border-bottom:2px solid rgba(74,58,42,.28);
  transition:transform .12s var(--ease), opacity .18s ease, border-color .16s;
}
.index-item:hover{
  transform:translateX(4px);
  border-bottom-color:var(--flash-orange);
}
.index-item__no{
  min-width:36px;
  font:700 12px/1.7 var(--font-mono);
  letter-spacing:.06em;
  color:var(--ember-red);
}
.index-item__title{
  font-weight:700;
  font-size:16.5px;
  line-height:1.5;
}
.index-item__meta{
  margin-left:auto;
  font:500 12.5px/1.7 var(--font-mono);
  color:var(--paper-shade);
}

/* 检索状态 */
[data-search-item].is-dim{opacity:.32}
[data-search-item].is-hit{
  padding-left:18px;
  border-left:4px solid var(--flash-orange);
  transform:translateX(6px);
}
.filter-empty{
  margin:14px 0 0;
  padding:14px 16px;
  border:2px dashed var(--paper-shade);
  font:500 13px/1.7 var(--font-mono);
  color:var(--paper-shade);
}

/* ---------- 12. 面包屑 / 正文 / 旁注 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0 0 20px;
  padding:0;
  list-style:none;
  font:500 12.5px/1.7 var(--font-mono);
  letter-spacing:.03em;
  color:var(--mist-blue);
}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.crumbs li::after{
  content:"/";
  margin-left:8px;
  color:var(--paper-shade);
}
.crumbs li:last-child::after{content:""}
.crumbs a{
  color:var(--signal-green);
  border-bottom:2px solid transparent;
}
.crumbs a:hover{border-bottom-color:var(--signal-green)}

.prose{max-width:72ch}
.prose h2,
.prose h3{
  font-family:var(--font-display);
  letter-spacing:-.005em;
}
.prose a{
  color:var(--ember-red);
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}
.prose a:hover{background:var(--flash-orange);color:var(--ink-brown)}

.annot{
  margin:20px 0;
  padding:6px 0 6px 16px;
  border-left:4px solid var(--ember-red);
  font-family:var(--font-serif);
  font-size:14.5px;
  line-height:1.85;
  color:var(--paper-shade);
}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  background:var(--ink-night);
  border-top:var(--bw) solid var(--ink-brown);
  padding-block:56px 44px;
}

.footer-panel{
  position:relative;
  padding:36px clamp(18px,2.4vw,32px) 24px;
  background:var(--paper-cream);
  color:var(--ink-brown);
  border:var(--bw) solid var(--ink-brown);
  box-shadow:10px 10px 0 rgba(4,10,18,.75);
}
.footer-panel__wire{
  position:absolute;
  top:-5px;
  left:-3px;
  right:-3px;
  height:5px;
  background:var(--signal-green);
}
.footer-panel__body{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1.5fr;
  gap:28px;
}

.footer-intro__mark{
  display:flex;
  align-items:center;
  margin:0 0 12px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(26px,2.6vw,34px);
  line-height:1;
  letter-spacing:-.01em;
}
.footer-intro__mark::after{
  content:"";
  display:inline-block;
  width:12px;
  height:12px;
  margin-left:10px;
  background:var(--flash-orange);
}
.footer-intro__text{
  max-width:36ch;
  margin:0 0 18px;
  font-size:15px;
  line-height:1.75;
  color:var(--paper-shade);
}

.footer-col__title{
  margin:0 0 12px;
  padding-bottom:10px;
  border-bottom:2px solid var(--ink-brown);
  font:700 13px/1 var(--font-mono);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ember-red);
}
.footer-col__list{
  display:grid;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-col__list a{
  display:inline-block;
  color:var(--ink-brown);
  font-size:15px;
  font-weight:600;
  border-bottom:2px solid transparent;
  transition:color .16s, border-color .16s;
}
.footer-col__list a:hover{
  color:var(--ember-red);
  border-bottom-color:var(--flash-orange);
}

.footer-contact__list{
  display:grid;
  gap:8px;
  margin:0 0 12px;
  padding:0;
  list-style:none;
  font-size:14px;
  line-height:1.65;
}
.footer-contact__list .mono{
  display:inline-block;
  min-width:46px;
  color:var(--ember-red);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
}
.footer-contact__note{
  margin:0;
  font-family:var(--font-serif);
  font-size:13px;
  line-height:1.75;
  color:var(--paper-shade);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  margin-top:30px;
  padding-top:18px;
  border-top:2px solid rgba(74,58,42,.42);
  font:500 12.5px/1.7 var(--font-mono);
  letter-spacing:.02em;
  color:var(--paper-shade);
}
.footer-base p{margin:0}
.footer-base__legal{
  font-weight:700;
  color:var(--ink-brown);
}
.footer-base__status{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.footer-base__status .dot{margin-right:0}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1180px){
  .footer-panel__body{grid-template-columns:1.4fr 1fr 1fr 1.4fr}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:980px){
  .grid--7-5,
  .grid--8-4,
  .grid--12{grid-template-columns:1fr}

  .masthead__inner{padding-block:16px}
  .masthead__tools{
    width:100%;
    justify-content:space-between;
    gap:12px;
  }
  .finder{flex:1 1 220px}
  .finder__input{width:100%}

  .nav-toggle{display:inline-flex}
  .site-nav__inner{
    flex-wrap:wrap;
    gap:10px;
    padding-block:8px;
  }
  .site-nav__list{
    display:none;
    flex:1 1 100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-top:6px;
    padding-top:6px;
    border-top:2px solid rgba(138,160,180,.28);
  }
  .site-nav[data-open] .site-nav__list{display:flex}
  .site-nav__list a{
    padding:14px 12px;
    border:0;
    border-left:3px solid transparent;
    border-bottom:1px solid rgba(138,160,180,.16);
  }
  .site-nav__list a[aria-current="page"]{
    border-left-color:var(--ink-brown);
    border-bottom-color:var(--flash-orange);
  }
  .site-nav__note{display:none}
}

@media (max-width:1100px){
  .footer-panel__body{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-intro{grid-column:1 / -1}
  .footer-contact{grid-column:auto}
}

@media (max-width:720px){
  :root{--gutter:18px}
  body{font-size:16px}
  .brand__line{display:none}
  .site-header{position:sticky}
  .panel{padding:22px 18px}
  .footer-panel__body{grid-template-columns:1fr;gap:24px}
  .footer-panel{padding:26px 18px 20px}
  .footer-base{gap:8px 16px}
  .footer-base__status{margin-left:0;flex-basis:100%}
}

/* ---------- 15. 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;
  }
  .js-reveal{opacity:1;transform:none}
  .sync__dot{animation:none;opacity:1}
}