/* ============================================================
   大港奥中文主站 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 刊头 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 01 变量 ---------- */
:root{
  --deep:#0B2A4A;
  --anchor:#061A2F;
  --orange:#FF6B35;
  --orange-text:#C74A1C;
  --orange-mist:#FFA26B;
  --cyan:#2ED3C6;
  --cyan-text:#0E6E67;
  --gold:#C9A227;
  --gold-text:#8A6E12;
  --mist:#E8EAED;
  --pearl:#F7F8F6;
  --graphite:#5A6B7C;
  --ink:#0F1115;
  --line:rgba(11,42,74,.14);
  --line-strong:rgba(11,42,74,.32);
  --line-invert:rgba(247,248,246,.16);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1360px;
  --page-x:96px;
  --gap:24px;
  --dur:180ms;
  --ease:cubic-bezier(.2,0,0,1);
}
@media (max-width:1240px){:root{--page-x:64px;}}
@media (max-width:900px){:root{--page-x:32px;}}
@media (max-width:640px){:root{--page-x:20px;--gap:16px;}}

/* ---------- 02 reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--pearl);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img,svg,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;padding:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
table{border-collapse:collapse;border-spacing:0;width:100%;}
[hidden]{display:none !important;}
[id]{scroll-margin-top:32px;}
::selection{background:var(--orange);color:var(--anchor);}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px;}

/* ---------- 03 中文排版 ---------- */
h1,h2,h3,h4{font-weight:900;line-height:1.25;letter-spacing:-.02em;color:var(--ink);}
h1{font-size:clamp(34px,5vw,56px);}
h2{font-size:32px;}
h3{font-size:22px;}
h4{font-size:17px;letter-spacing:0;}
p{font-size:16px;}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.01em;
}
.prose .mono,
.lede .mono,
td .mono,
.footer__contact-line .mono{margin-inline:.16em;}
.index-label{
  display:inline-block;
  font-size:11px;
  letter-spacing:.16em;
  line-height:1.6;
  color:var(--graphite);
  text-transform:uppercase;
}
.display-xl{font-size:clamp(34px,5.4vw,72px);font-weight:900;letter-spacing:-.02em;line-height:1.05;color:var(--deep);}
.display-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:300;
  font-size:clamp(48px,8vw,140px);
  line-height:.92;
  letter-spacing:-.04em;
  color:var(--deep);
  font-variant-numeric:tabular-nums;
}
.lede{font-size:19px;line-height:1.78;color:var(--deep);max-width:760px;}
.prose{max-width:720px;font-size:17px;line-height:1.85;color:var(--ink);}
.prose > p + p{margin-top:1.1em;}
.prose h2{font-size:24px;margin:2.2em 0 .7em;}
.prose h3{font-size:19px;margin:1.8em 0 .6em;color:var(--deep);}
.prose ul{margin:1em 0;}
.prose ul li{position:relative;padding-left:20px;}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:9px;height:1px;background:var(--orange);}
.prose a{border-bottom:1px solid var(--orange);color:var(--orange-text);}
.note{
  font-size:12px;
  line-height:1.8;
  color:var(--graphite);
  border-left:1px solid var(--line-strong);
  padding-left:12px;
  max-width:60ch;
}

/* ---------- 04 宽度容器 ---------- */
.container,
.masthead__bar,
.masthead__nav-inner,
.masthead__note,
.footer__inner,
.footer__strip,
.footer__base{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--page-x);
}

/* ---------- 05 网格 ---------- */
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap);}
.grid--loose{gap:56px var(--gap);}
.grid--tight{gap:12px;}
.s-3{grid-column-end:span 3;}
.s-4{grid-column-end:span 4;}
.s-5{grid-column-end:span 5;}
.s-6{grid-column-end:span 6;}
.s-7{grid-column-end:span 7;}
.s-8{grid-column-end:span 8;}
.s-9{grid-column-end:span 9;}
.s-10{grid-column-end:span 10;}
.s-12{grid-column-end:span 12;}
.o-1{grid-column-start:2;}
.o-2{grid-column-start:3;}
.o-3{grid-column-start:4;}
.o-4{grid-column-start:5;}
.o-5{grid-column-start:6;}
.o-6{grid-column-start:7;}
@media (max-width:1080px){
  .o-1,.o-2,.o-3,.o-4,.o-5,.o-6{grid-column-start:auto;}
  .s-3,.s-4,.s-5{grid-column-end:span 6;}
  .s-7,.s-8,.s-9,.s-10{grid-column-end:span 12;}
}
@media (max-width:680px){
  .s-3,.s-4,.s-5,.s-6,.s-7,.s-8,.s-9,.s-10{grid-column-end:span 12;}
}

/* ---------- 06 面板 ---------- */
.panel{
  position:relative;
  background:var(--pearl);
  border-top:1px solid var(--line-strong);
  padding-block:clamp(40px,5.4vw,76px);
}
.panel--mist{background:var(--mist);}
.panel--deep{background:var(--deep);color:var(--pearl);border-top-color:var(--line-invert);}
.panel--deep h1,.panel--deep h2,.panel--deep h3,.panel--deep .panel__title,.panel--deep .display-xl,.panel--deep .display-num{color:var(--pearl);}
.panel--deep .lede{color:rgba(247,248,246,.84);}
.panel--deep .prose,.panel--deep p{color:rgba(247,248,246,.86);}
.panel--deep .panel__index,.panel--deep .index-label{color:var(--orange-mist);}
.panel--deep .note{color:rgba(247,248,246,.6);border-left-color:var(--line-invert);}
.panel__head{
  display:grid;
  grid-template-columns:minmax(0,120px) minmax(0,1fr);
  gap:var(--gap);
  align-items:start;
  margin-bottom:32px;
}
.panel__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--orange-text);
  padding-top:9px;
  font-variant-numeric:tabular-nums;
}
.panel__title{font-size:clamp(24px,3vw,32px);font-weight:900;letter-spacing:-.02em;line-height:1.28;}
.panel__body{max-width:860px;font-size:16px;}
.panel__body > * + *{margin-top:1.1em;}
@media (max-width:680px){
  .panel__head{grid-template-columns:1fr;gap:6px;margin-bottom:22px;}
  .panel__index{padding-top:0;}
}

/* ---------- 07 线条与引导线 ---------- */
.rule{height:1px;background:var(--line-strong);border:0;margin:0;}
.rule--orange{background:var(--orange);}
.slant{
  position:relative;
  width:120px;
  height:1px;
  background:var(--orange);
  transform:rotate(-18deg);
  transform-origin:left center;
}
.slant::after{
  content:"";
  position:absolute;
  right:-3px;
  top:-3px;
  width:7px;
  height:7px;
  background:var(--orange);
}
.slant--long{width:220px;}
.slant--gold{background:var(--gold);}
.slant--gold::after{background:var(--gold);}
@media (max-width:680px){.slant,.slant--long{width:72px;}}

/* ---------- 08 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  line-height:1.4;
  border:1px solid transparent;
  border-radius:0;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
  white-space:nowrap;
}
.btn--solid{background:var(--orange);color:var(--anchor);}
.btn--solid:hover{background:var(--orange-mist);color:var(--anchor);}
.btn--line{border-color:var(--line-strong);color:var(--deep);}
.btn--line:hover{border-color:var(--orange);color:var(--orange-text);}
.btn--ghost{border-color:rgba(247,248,246,.36);color:var(--pearl);}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange-mist);background:rgba(255,107,53,.12);}

/* ---------- 09 刊头 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-120px;
  z-index:90;
  background:var(--orange);
  color:var(--anchor);
  padding:10px 16px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px;}

.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  background:transparent;
  z-index:70;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 120ms linear;
}

.masthead{
  position:relative;
  background:var(--deep);
  color:var(--pearl);
  border-bottom:1px solid var(--line-invert);
  z-index:40;
}
.masthead__bar{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:16px 20px;
  padding-block:24px 20px;
}
.masthead__aside{display:flex;align-items:center;gap:14px;min-width:0;}
.masthead__aside--start{justify-content:flex-start;}
.masthead__aside--end{justify-content:flex-end;}

.masthead__brand{text-align:center;min-width:0;}
.masthead__brand-link{
  display:inline-block;
  font-size:clamp(26px,3.4vw,40px);
  font-weight:900;
  line-height:1;
  letter-spacing:.24em;
  text-indent:.24em;
  color:var(--pearl);
  transition:color var(--dur) var(--ease);
}
.masthead__brand-link:hover{color:var(--orange-mist);}
.masthead__brand-line{
  display:block;
  margin-top:10px;
  font-size:11px;
  letter-spacing:.22em;
  text-indent:.22em;
  color:var(--orange-mist);
}

.masthead__status{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:1px;
  font-size:11px;
  line-height:1.65;
  letter-spacing:.14em;
  text-align:right;
  color:rgba(247,248,246,.58);
}
.status-key{color:var(--cyan);}
.status-val{color:var(--gold);font-size:12px;}
.status-meta{color:rgba(247,248,246,.5);}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border:1px solid rgba(247,248,246,.3);
  color:var(--pearl);
  font-size:12px;
  letter-spacing:.16em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange-mist);}
.nav-toggle__bars{position:relative;display:block;width:16px;height:8px;}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:1px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:0;}
.nav-toggle__bars::after{bottom:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(3.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-3.5px) rotate(-45deg);}
.nav-toggle__label{line-height:1;}

.masthead__nav{
  background:var(--anchor);
  border-top:1px solid rgba(247,248,246,.08);
  overflow-x:auto;
  overscroll-behavior-x:contain;
}
.masthead__nav-inner{
  display:flex;
  align-items:stretch;
  min-width:max-content;
}
.nav-list{display:flex;align-items:stretch;}
.nav-list__item{display:flex;}
.nav-link{
  display:block;
  padding:14px 20px 13px;
  font-size:14px;
  letter-spacing:.12em;
  color:rgba(247,248,246,.76);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--pearl);background:rgba(247,248,246,.07);}
.nav-link[aria-current="page"]{color:var(--pearl);border-bottom-color:var(--orange);}

.masthead__note{
  background:var(--anchor);
  border-top:1px solid rgba(247,248,246,.08);
  padding-block:9px;
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(247,248,246,.46);
  text-align:center;
}

@media (max-width:900px){
  .masthead__bar{grid-template-columns:auto minmax(0,1fr) auto;padding-block:16px 14px;}
  .masthead__aside--start .btn{display:none;}
  .masthead__status{display:none;}
  .nav-toggle{display:inline-flex;}
  .masthead__nav-inner{display:block;min-width:0;padding-inline:0;}
  [data-js="on"] .masthead__nav{display:none;}
  .masthead__nav[data-open]{display:block;}
  .nav-list{flex-direction:column;}
  .nav-list__item{display:block;}
  .nav-link{
    padding:15px var(--page-x);
    border-bottom:1px solid rgba(247,248,246,.12);
    font-size:15px;
  }
  .nav-link[aria-current="page"]{
    border-bottom-color:rgba(247,248,246,.12);
    border-left:2px solid var(--orange);
    background:rgba(255,107,53,.14);
    color:var(--orange-mist);
  }
}
@media (max-width:640px){
  .masthead__note{display:none;}
  .masthead__brand-link{letter-spacing:.18em;text-indent:.18em;}
}

/* ---------- 10 页脚 ---------- */
.site-footer{
  background:var(--anchor);
  color:rgba(247,248,246,.74);
  border-top:1px solid var(--orange);
}
.footer__inner{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:48px 64px;
  padding-block:64px 44px;
}
.footer__wordmark{
  font-size:26px;
  font-weight:900;
  letter-spacing:.24em;
  color:var(--pearl);
  line-height:1.2;
}
.footer__brand-block{
  margin-top:14px;
  max-width:36em;
  font-size:13px;
  line-height:1.95;
  color:rgba(247,248,246,.6);
}
.footer__columns{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:32px 24px;
}
.footer__col-title{
  font-size:11px;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--gold);
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line-invert);
}
.footer__list{display:flex;flex-direction:column;gap:9px;}
.footer__item{display:block;}
.footer__link{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:rgba(247,248,246,.78);
  transition:color var(--dur) var(--ease);
}
.footer__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-3px;
  height:1px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform var(--dur) var(--ease);
}
.footer__link:hover{color:var(--pearl);}
.footer__link:hover::after{transform:scaleX(1);}

.footer__contact{
  border-top:1px solid var(--line-invert);
  border-bottom:1px solid var(--line-invert);
}
.footer__strip{padding-block:20px;}
.footer__contact-line{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.9;
  letter-spacing:.02em;
  color:rgba(247,248,246,.72);
}
.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 32px;
  padding-block:22px 40px;
  font-size:12px;
  line-height:1.9;
  color:rgba(247,248,246,.52);
}
.footer__duty{max-width:62ch;}
.footer__icp{color:var(--gold);letter-spacing:.06em;}
.footer__copyright{color:rgba(247,248,246,.52);}

.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:60;
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  background:var(--deep);
  border:1px solid var(--deep);
  color:var(--pearl);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  opacity:0;
  visibility:hidden;
  transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;}
.to-top:hover{background:var(--orange);border-color:var(--orange);color:var(--anchor);}

@media (max-width:900px){
  .footer__inner{grid-template-columns:1fr;gap:40px;padding-block:48px 36px;}
  .footer__columns{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:520px){
  .footer__columns{grid-template-columns:1fr;}
  .to-top{right:16px;bottom:16px;}
}

/* ---------- 11 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--graphite);
  background:transparent;
  white-space:nowrap;
}
.tag--orange{border-color:var(--orange);color:var(--orange-text);}
.tag--gold{border-color:var(--gold);color:var(--gold-text);}
.tag--cyan{border-color:var(--cyan);color:var(--cyan-text);}
.panel--deep .tag{border-color:var(--line-invert);color:rgba(247,248,246,.76);}
.panel--deep .tag--gold{border-color:var(--gold);color:var(--gold);}
.panel--deep .tag--cyan{border-color:var(--cyan);color:var(--cyan);}

/* ---------- 12 数据卡与参数带 ---------- */
.data-card{
  position:relative;
  background:var(--pearl);
  border:1px solid var(--line-strong);
  padding:22px 24px 20px;
}
.data-card::before{
  content:"";
  position:absolute;
  left:-1px;top:-1px;
  width:36px;height:2px;
  background:var(--orange);
}
.data-card--deep{background:var(--deep);border-color:rgba(247,248,246,.22);color:var(--pearl);}
.data-card--deep .data-card__label{color:rgba(247,248,246,.58);}
.data-card--deep .data-card__value{color:var(--pearl);}
.data-card--deep .data-card__unit{color:rgba(247,248,246,.58);}
.data-card--float{margin-top:-56px;}
.data-card__label{
  display:block;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--graphite);
  margin-bottom:10px;
}
.data-card__value{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:clamp(28px,3.4vw,40px);
  font-weight:500;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--deep);
  font-variant-numeric:tabular-nums;
}
.data-card--accent .data-card__value{color:var(--cyan-text);}
.data-card--deep.data-card--accent .data-card__value{color:var(--cyan);}
.data-card__unit{
  margin-left:8px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--graphite);
}
@media (max-width:900px){.data-card--float{margin-top:0;}}

.data-strip{
  display:flex;
  flex-wrap:wrap;
  border:1px solid var(--line-strong);
  background:var(--pearl);
}
.data-strip__item{
  flex:1 1 180px;
  padding:16px 20px;
  border-right:1px solid var(--line);
}
.data-strip__item:last-child{border-right:0;}

/* ---------- 13 服务路径（技能树） ---------- */
.steps{display:grid;gap:0;}
.steps__item{
  position:relative;
  padding:0 0 34px 30px;
  border-left:1px solid var(--line-strong);
}
.steps__item:last-child{padding-bottom:0;}
.steps__item::before{
  content:"";
  position:absolute;
  left:-5px;top:8px;
  width:9px;height:9px;
  background:var(--pearl);
  border:1px solid var(--orange);
}
.panel--mist .steps__item::before{background:var(--mist);}
.steps__item--done::before{background:var(--orange);}
.steps__num{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--orange-text);
  margin-bottom:6px;
}
.steps__title{font-size:18px;font-weight:900;letter-spacing:-.01em;margin-bottom:6px;}
.steps__body{font-size:15px;line-height:1.85;color:var(--graphite);max-width:56ch;}

/* ---------- 14 表格 ---------- */
.table-wrap{overflow-x:auto;border-top:1px solid var(--line-strong);}
.table{min-width:520px;font-size:14px;}
.table th{
  padding:12px 16px;
  font-size:11px;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--graphite);
  text-align:left;
  border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.table td{
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
  line-height:1.8;
}
.table--zebra tbody tr:nth-child(even){background:var(--mist);}
.table td .mono{color:var(--deep);}

/* ---------- 15 目录与锚点列表 ---------- */
.toc{position:sticky;top:24px;font-size:13px;}
.toc__title{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--graphite);
  border-top:1px solid var(--line-strong);
  padding-top:14px;
  margin-bottom:6px;
}
.toc a{
  display:block;
  padding:9px 0 9px 14px;
  border-left:1px solid var(--line);
  color:var(--graphite);
  line-height:1.6;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.toc a:hover{color:var(--orange-text);border-left-color:var(--orange);background:rgba(255,107,53,.06);}
.toc a[aria-current="true"]{color:var(--ink);font-weight:700;border-left-color:var(--orange);}

.anchor-list{border-top:1px solid var(--line-strong);}
.anchor-list__link{
  display:grid;
  grid-template-columns:48px minmax(0,1fr);
  gap:12px;
  align-items:baseline;
  padding:14px 12px 14px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--deep);
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.anchor-list__link:hover{color:var(--orange-text);background:rgba(255,107,53,.07);padding-left:10px;}
.anchor-list__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--orange-text);}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--graphite);
}
.breadcrumb__item{display:inline;}
.breadcrumb__sep{color:var(--orange);}

/* ---------- 16 折叠问答 ---------- */
.disclosure{border-top:1px solid var(--line-strong);}
.disclosure:last-of-type{border-bottom:1px solid var(--line-strong);}
.disclosure__summary{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:17px 0;
  font-size:17px;
  font-weight:700;
  letter-spacing:0;
  cursor:pointer;
  list-style:none;
  color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.disclosure__summary::-webkit-details-marker{display:none;}
.disclosure__summary::before{
  content:"＋";
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:400;
  color:var(--orange-text);
}
.disclosure[open] .disclosure__summary::before{content:"－";}
.disclosure__summary:hover{color:var(--orange-text);}
.disclosure__body{
  padding:0 0 22px 30px;
  max-width:72ch;
  font-size:15px;
  line-height:1.9;
  color:var(--graphite);
}

/* ---------- 17 纯 CSS 筛选 ---------- */
.filter{border:1px solid var(--line-strong);background:var(--pearl);}
.filter__bar{display:flex;flex-wrap:wrap;background:var(--mist);border-bottom:1px solid var(--line-strong);}
.filter__input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none;}
.filter__label{
  padding:10px 16px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--graphite);
  cursor:pointer;
  border-right:1px solid var(--line);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.filter__label:hover{background:rgba(255,107,53,.1);color:var(--orange-text);}
.filter__input:checked + .filter__label{background:var(--deep);color:var(--pearl);}
.filter__input:focus-visible + .filter__label{outline:2px solid var(--orange);outline-offset:-3px;}
.filter__list{display:grid;}
.filter__list > *{padding:15px 18px;border-bottom:1px solid var(--line);}
.filter__list > *:last-child{border-bottom:0;}
.filter:has(.filter__input[data-cat~="k1"]:checked) .filter__list > *:not([data-cat~="k1"]),
.filter:has(.filter__input[data-cat~="k2"]:checked) .filter__list > *:not([data-cat~="k2"]),
.filter:has(.filter__input[data-cat~="k3"]:checked) .filter__list > *:not([data-cat~="k3"]),
.filter:has(.filter__input[data-cat~="k4"]:checked) .filter__list > *:not([data-cat~="k4"]),
.filter:has(.filter__input[data-cat~="k5"]:checked) .filter__list > *:not([data-cat~="k5"]),
.filter:has(.filter__input[data-cat~="k6"]:checked) .filter__list > *:not([data-cat~="k6"]){display:none;}

/* ---------- 18 复制按钮 ---------- */
.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--graphite);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.copy-btn:hover{border-color:var(--orange);color:var(--orange-text);}
.copy-btn[data-copied="true"]{border-color:var(--cyan);color:var(--cyan-text);background:rgba(46,211,198,.12);}

/* ---------- 19 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--mist);
  border:1px solid var(--line-strong);
}
.media img{width:100%;height:100%;object-fit:cover;object-position:center;filter:saturate(.94) contrast(1.04);}
.media--16x9{aspect-ratio:16 / 9;}
.media--4x3{aspect-ratio:4 / 3;}
.media--3x4{aspect-ratio:3 / 4;}
.media--square{aspect-ratio:1 / 1;}
.media--21x9{aspect-ratio:21 / 9;}
.media--cool::after,
.media--warm::after{content:"";position:absolute;inset:0;pointer-events:none;}
.media--cool::after{background:rgba(11,42,74,.18);}
.media--warm::after{background:rgba(255,107,53,.15);}
.media__cap{
  display:block;
  margin-top:10px;
  font-size:12px;
  line-height:1.75;
  letter-spacing:.04em;
  color:var(--graphite);
}
.panel--deep .media__cap{color:rgba(247,248,246,.6);}

/* ---------- 20 无障碍与降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}