/* =========================================================
   滕博会官网 · 共享样式表 /assets/site.css
   模块顺序：变量 → reset → 中文排版 → 容器与网格
             → 命令栏 → 页脚 → 通用组件 → 图片容器 → 响应式与无障碍
   ========================================================= */

/* ---------- 0. 变量 ---------- */
:root{
  --ink:#0B1626;
  --ink-2:#122238;
  --ink-3:#1B3050;
  --ink-4:#243B5C;
  --ochre:#C2662E;
  --celadon:#6E8F86;
  --signal:#F2C230;
  --signal-hi:#FFD24A;
  --paper:#E8E3D8;
  --paper-2:#C9C2B2;
  --line:#3A4A60;
  --ok:#4E9A7A;
  --alert:#B4544A;

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-ui:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-body:"Songti SC","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Cascadia Mono","Noto Sans Mono",monospace;

  --cut:12px;
  --w:1240px;
  --pad:clamp(16px,4vw,40px);
  --h:64px;
}

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
[hidden]{display:none !important}
::selection{background:var(--ochre);color:var(--paper)}

/* ---------- 2. 中文排版与页面底色 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 14% -8%, rgba(110,143,134,.12), transparent 52%),
    radial-gradient(circle at 92% 2%, rgba(194,102,46,.12), transparent 46%),
    repeating-linear-gradient(0deg, rgba(232,227,216,.016) 0 1px, transparent 1px 4px);
  color:var(--paper);
  font-family:var(--font-ui);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.22;
  letter-spacing:-.02em;
  color:var(--paper);
  text-shadow:0 1px 0 rgba(0,0,0,.45), 0 -1px 0 rgba(232,227,216,.05);
}
h1{font-size:clamp(32px,4.4vw,56px)}
h2{font-size:clamp(22px,2.6vw,28px)}
h3{font-size:clamp(18px,2vw,22px)}
p{overflow-wrap:break-word}
strong{font-weight:800;color:var(--paper)}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--signal);outline-offset:2px}

/* ---------- 3. 容器与网格 ---------- */
.th-wrap{
  width:100%;
  max-width:var(--w);
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
}
.th-section{padding:clamp(36px,5.5vw,72px) 0}
.th-sec-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:2px 14px;
  padding-bottom:14px;
  margin-bottom:clamp(18px,2.4vw,28px);
  border-bottom:1px solid var(--line);
}
.th-sec-num{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  color:var(--ochre);
}
.th-sec-title{font-size:clamp(20px,2.6vw,28px);color:var(--paper)}
.th-sec-lead{
  flex:1 0 100%;
  max-width:62ch;
  font-size:14px;
  line-height:1.75;
  color:var(--paper-2);
  margin-top:6px;
}
.th-grid{display:grid;gap:clamp(12px,1.8vw,24px)}
.th-grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.th-span-3{grid-column:span 3}
.th-span-4{grid-column:span 4}
.th-span-6{grid-column:span 6}
.th-span-8{grid-column:span 8}
.th-span-12{grid-column:span 12}
.th-rule{border:0;border-top:1px solid var(--line);margin:clamp(24px,4vw,44px) 0}
.th-mono{font-family:var(--font-mono);font-size:.82em;font-weight:500;letter-spacing:.06em}
.th-link{
  color:var(--signal);
  text-decoration:none;
  border-bottom:1px solid rgba(242,194,48,.45);
  transition:color .16s ease-out,border-color .16s ease-out;
}
.th-link:hover{color:var(--signal-hi);border-bottom-color:var(--signal-hi)}

/* ---------- 4. 命令栏（共享头部） ---------- */
.th-skip{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;
  background:var(--signal);color:var(--ink);
  font-family:var(--font-ui);font-size:14px;font-weight:800;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transform:translateY(-180%);
  transition:transform .18s ease-out;
}
.th-skip:focus,.th-skip:focus-visible{transform:translateY(0)}

.th-command{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,#122238 0%,#0F1D30 100%);
  border-bottom:1px solid var(--line);
}
.th-command::after{
  content:"";position:absolute;left:0;bottom:-1px;
  width:88px;height:2px;background:var(--ochre);
  pointer-events:none;
}
.th-command-inner{
  display:flex;align-items:center;gap:16px;
  width:100%;max-width:var(--w);margin:0 auto;
  height:var(--h);
  padding:0 var(--pad);
  transition:height .18s ease-out;
}
.th-command.is-scrolled .th-command-inner{height:52px}

.th-brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none}
.th-brand-plate{
  width:32px;height:32px;flex:0 0 auto;
  display:grid;place-items:center;
  background:var(--ochre);color:#0B1626;
  font-family:var(--font-display);font-weight:900;font-size:17px;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
}
.th-brand-text{display:flex;flex-direction:column;line-height:1.1}
.th-brand-name{
  font-family:var(--font-display);font-weight:800;font-size:16.5px;
  letter-spacing:-.01em;color:var(--paper);
}
.th-brand-sub{
  font-family:var(--font-mono);font-size:9.5px;font-weight:500;
  letter-spacing:.14em;color:var(--celadon);
  color:var(--celadon);
}
.th-ver{
  display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;
  padding:3px 8px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.06em;
  color:var(--signal);
  background:rgba(242,194,48,.08);
  border:1px solid rgba(242,194,48,.42);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.th-ver-dot{width:5px;height:5px;background:var(--signal);display:inline-block}

.th-nav{flex:1 1 auto;min-width:0}
.th-nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.th-nav-item{position:relative}
.th-nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:7px 10px;
  font-family:var(--font-ui);font-size:13.5px;font-weight:600;
  color:var(--paper-2);
  border:1px solid transparent;
  transition:color .16s ease-out,background-color .16s ease-out,border-color .16s ease-out;
}
.th-nav-link:hover{color:var(--paper);background:var(--ink-3);border-color:var(--line)}
.th-nav-idx{
  font-family:var(--font-mono);font-size:9.5px;font-weight:500;
  letter-spacing:.06em;color:var(--celadon);
}
.th-nav-link[aria-current="page"]{color:var(--paper);font-weight:800;background:rgba(27,48,80,.6)}
.th-nav-link[aria-current="page"] .th-nav-idx{color:var(--signal)}
.th-nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:10px;right:10px;bottom:1px;height:2px;
  background:var(--signal);
}

.th-quick{display:flex;align-items:center;gap:8px;flex:0 0 auto;margin-left:auto}
.th-quick-link{
  display:inline-flex;align-items:center;
  padding:8px 12px;
  font-family:var(--font-ui);font-size:12.5px;font-weight:700;letter-spacing:.02em;
  color:var(--paper);
  background:var(--ink-3);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,0 100%);
  transition:background-color .16s ease-out,border-color .16s ease-out,color .16s ease-out;
}
.th-quick-link:hover{background:var(--ink-4);border-color:var(--ochre);color:var(--paper)}
.th-quick-link--alt{background:var(--signal);color:#0B1626;border-color:var(--signal)}
.th-quick-link--alt:hover{background:var(--signal-hi);color:#0B1626;border-color:var(--signal-hi)}

.th-nav-toggle{
  display:none;align-items:center;gap:8px;margin-left:auto;
  padding:8px 11px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;letter-spacing:.1em;
  color:var(--paper);
  background:var(--ink-3);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.th-nav-toggle:hover{border-color:var(--ochre)}
.th-nav-toggle-bars{display:flex;flex-direction:column;justify-content:center;gap:4px;width:14px}
.th-nav-toggle-bar{
  display:block;width:14px;height:2px;background:var(--paper);
  transition:transform .16s ease-out,opacity .16s ease-out;
}
.th-nav-toggle[aria-expanded="true"] .th-nav-toggle-bar:nth-child(1){transform:translateY(3px) rotate(45deg)}
.th-nav-toggle[aria-expanded="true"] .th-nav-toggle-bar:nth-child(2){transform:translateY(-3px) rotate(-45deg)}
.th-nav-toggle-label{white-space:nowrap}

/* ---------- 5. 页脚（共享底部） ---------- */
.th-foot{
  background:linear-gradient(180deg,#122238 0%,#0E1B2C 100%);
  border-top:1px solid var(--line);
  margin-top:clamp(40px,6vw,80px);
}
.th-foot-inner{
  width:100%;max-width:var(--w);margin:0 auto;
  padding:clamp(28px,4vw,44px) var(--pad) 0;
}

.th-foot-ruler{padding-bottom:clamp(20px,3vw,30px)}
.th-ruler-label{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;color:var(--celadon);
  margin-bottom:14px;
}
.th-ruler-track{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(10px,2vw,20px);
  border-top:1px solid var(--line);
  padding-top:18px;
}
.th-ruler-node{position:relative;display:flex;flex-direction:column;gap:4px;padding-left:16px}
.th-ruler-node::before{
  content:"";position:absolute;left:0;top:4px;
  width:8px;height:8px;background:var(--ochre);
  transform:rotate(45deg);
}
.th-ruler-node--now::before{background:var(--signal);box-shadow:0 0 0 3px rgba(242,194,48,.16)}
.th-ruler-v{
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.08em;
  color:var(--paper);
}
.th-ruler-node--now .th-ruler-v{color:var(--signal)}
.th-ruler-note{font-size:12.5px;line-height:1.6;color:var(--paper-2)}

.th-foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1.3fr;
  gap:clamp(20px,3vw,40px);
  padding:clamp(22px,3vw,32px) 0;
  border-top:1px solid var(--line);
}
.th-foot-col{min-width:0}
.th-foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.th-foot-name{
  font-family:var(--font-display);font-weight:800;font-size:18px;
  letter-spacing:-.01em;color:var(--paper);
}
.th-foot-motto{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;
  color:var(--paper-2);line-height:1.9;
}
.th-foot-note{font-size:12.5px;color:var(--paper-2);margin-top:8px;line-height:1.7}
.th-foot-title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;color:var(--celadon);
  margin-bottom:12px;
}
.th-foot-list{display:flex;flex-direction:column;gap:7px}
.th-foot-link{
  display:inline-block;
  font-size:13.5px;color:var(--paper-2);
  text-decoration:none;
  transition:color .16s ease-out;
}
.th-foot-link:hover{color:var(--paper);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--ochre)}
.th-contact-line{display:grid;grid-template-columns:38px 1fr;gap:8px;font-size:13px;line-height:1.7}
.th-contact-key{
  font-family:var(--font-mono);font-size:10.5px;font-weight:500;
  letter-spacing:.08em;color:var(--celadon);padding-top:2px;
}
.th-contact-val{color:var(--paper-2);word-break:break-word}

.th-foot-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  padding:16px 0 24px;
  border-top:1px solid var(--line);
}
.th-foot-copy{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--paper-2);
}
.th-legal-links{display:flex;flex-wrap:wrap;gap:6px 18px}
.th-legal-links .th-foot-link{font-size:12.5px}

/* ---------- 6. 通用组件 ---------- */
.th-crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  padding:16px 0 4px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;
  color:var(--celadon);
}
.th-crumb{color:var(--paper-2);text-decoration:none;transition:color .16s ease-out}
.th-crumb:hover{color:var(--paper);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--ochre)}
.th-crumb[aria-current="page"]{color:var(--paper)}
.th-crumb-sep{color:var(--line)}

.th-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;
  font-family:var(--font-ui);font-size:14px;font-weight:700;line-height:1.1;
  color:var(--paper);
  background:var(--ink-3);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
}
.th-btn:hover{background:var(--ink-4);border-color:var(--ochre);transform:translateY(-2px)}
.th-btn--signal{background:var(--signal);color:#0B1626;border-color:var(--signal)}
.th-btn--signal:hover{background:var(--signal-hi);color:#0B1626;border-color:var(--signal-hi)}
.th-btn--quiet{background:transparent}
.th-btn--quiet:hover{background:var(--ink-3)}

.th-panel{
  position:relative;
  padding:clamp(16px,2vw,22px);
  background:var(--ink-2);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
  transition:background-color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.th-panel--plate{background:var(--ink-3)}
.th-panel--hover:hover{border-color:var(--ochre);background:var(--ink-3);transform:translateY(-2px)}

.th-card{
  display:block;
  padding:clamp(16px,2vw,22px);
  background:var(--ink-2);
  border:1px solid var(--line);
  border-top:2px solid var(--ochre);
  transition:background-color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.th-card:hover{background:var(--ink-3);border-color:var(--ochre);transform:translateY(-2px)}
.th-card-title{font-size:17px;font-weight:800;color:var(--paper);margin-bottom:6px}
.th-card-meta{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.06em;color:var(--celadon);
}

.th-plate{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.06em;
  color:var(--signal);
  background:rgba(242,194,48,.08);
  border:1px solid rgba(242,194,48,.42);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}

.th-tagwall{display:flex;flex-wrap:wrap;gap:8px}
.th-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;letter-spacing:.04em;
  color:var(--paper-2);
  background:var(--ink-3);
  border:1px solid var(--line);
  text-decoration:none;
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
  transition:background-color .16s ease-out,border-color .16s ease-out,color .16s ease-out;
}
.th-tag:hover{border-color:var(--ochre);color:var(--paper);background:var(--ink-4)}
.th-tag[aria-pressed="true"]{
  border-color:var(--signal);color:var(--paper);background:var(--ink-4);
  box-shadow:inset 0 -2px 0 var(--signal);
}

.th-stream{display:flex;flex-direction:column;gap:10px}
.th-stream-item{
  padding:13px 15px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-left:2px solid var(--ochre);
  transition:background-color .16s ease-out,border-color .16s ease-out;
}
.th-stream-item:hover{background:var(--ink-3);border-color:var(--ochre);border-left-color:var(--signal)}
.th-stream-meta{
  display:flex;flex-wrap:wrap;gap:4px 10px;
  font-family:var(--font-mono);font-size:10.5px;font-weight:500;
  letter-spacing:.07em;color:var(--celadon);
}
.th-stream-title{font-size:14.5px;font-weight:700;color:var(--paper);line-height:1.55;margin-top:3px}

.th-clamp{
  overflow:hidden;
  max-height:3.5em;
  transition:max-height .2s ease-out;
}
.th-clamp[data-expanded="true"]{max-height:70em}
.th-disclosure{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:8px;padding:2px 0;
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;letter-spacing:.08em;
  color:var(--signal);
  border-bottom:1px solid rgba(242,194,48,.42);
  transition:color .16s ease-out,border-color .16s ease-out;
}
.th-disclosure:hover{color:var(--signal-hi);border-bottom-color:var(--signal-hi)}

.th-filter-status{
  min-height:1.5em;margin-top:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;
  color:var(--celadon);
}

.th-prose{
  max-width:720px;
  font-family:var(--font-body);
  font-size:16.5px;line-height:1.85;
  color:var(--paper-2);
}
.th-prose p+p{margin-top:1em}
.th-prose h3{
  font-family:var(--font-display);
  font-size:20px;color:var(--paper);
  margin:1.6em 0 .6em;
}
.th-prose ul{list-style:none;margin:1em 0}
.th-prose li{position:relative;padding-left:16px;margin-bottom:.45em}
.th-prose li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:6px;height:6px;background:var(--ochre);transform:rotate(45deg);
}

.th-timeline{position:relative;display:flex;flex-direction:column;gap:18px;padding-left:24px}
.th-timeline::before{
  content:"";position:absolute;left:5px;top:6px;bottom:6px;
  width:1px;background:var(--line);
}
.th-tl-item{position:relative}
.th-tl-item::before{
  content:"";position:absolute;left:-24px;top:6px;
  width:9px;height:9px;background:var(--ochre);transform:rotate(45deg);
}
.th-tl-v{
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;
  letter-spacing:.08em;color:var(--signal);
}
.th-tl-body{font-size:14px;line-height:1.7;color:var(--paper-2);margin-top:2px}

/* ---------- 7. 图片容器基础规则 ---------- */
.th-grain{position:relative}
.th-grain::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(232,227,216,.07) 1px,transparent 1px);
  background-size:3px 3px;
  opacity:.55;
}
.th-media{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  aspect-ratio:4/3;
  background-color:var(--ink-3);
  background-image:repeating-linear-gradient(135deg,rgba(232,227,216,.05) 0 1px,transparent 1px 9px);
  border:1px solid var(--line);
  transition:border-color .18s ease-out;
}
.th-media:hover{border-color:var(--ochre)}
.th-media > img{width:100%;height:100%;object-fit:cover}
.th-media--wide{aspect-ratio:16/9}
.th-media--tall{aspect-ratio:3/4}
.th-media--square{aspect-ratio:1/1}
.th-media--cut{clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%)}
.th-media-cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:20px 10px 8px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.04em;
  color:var(--paper-2);
  background:linear-gradient(to top,rgba(11,22,38,.92),rgba(11,22,38,0));
  pointer-events:none;
}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1180px){
  .th-brand-sub{display:none}
  .th-command-inner{gap:12px}
  .th-nav-link{padding:7px 8px;font-size:13px}
  .th-nav-link[aria-current="page"]::after{left:8px;right:8px}
  .th-quick-link{padding:7px 10px;font-size:12px}
}

@media (max-width:980px){
  :root{--h:56px}
  .th-quick{display:none}
  .th-nav-toggle{display:inline-flex}
  .th-nav{
    position:fixed;inset:0;z-index:50;
    display:block;
    padding:calc(var(--h) + 16px) var(--pad) 32px;
    background:rgba(11,22,38,.985);
    border-bottom:1px solid var(--line);
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
  }
  .th-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .th-nav-list{flex-direction:column;align-items:stretch;gap:0}
  .th-nav-item{border-bottom:1px solid var(--line)}
  .th-nav-link{
    display:flex;justify-content:space-between;align-items:center;
    padding:16px 4px;font-size:16px;border:1px solid transparent;
  }
  .th-nav-link[aria-current="page"]{background:transparent;padding-left:10px}
  .th-nav-link[aria-current="page"]::after{left:4px;right:auto;width:26px;bottom:6px}
  .th-nav-idx{font-size:10.5px}
  html.th-nav-open{overflow:hidden}

  .th-command.is-scrolled .th-command-inner{height:48px}

  .th-foot-grid{grid-template-columns:1fr 1fr}
  .th-foot-col:first-child{grid-column:span 2}
  .th-ruler-track{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 20px}
}

@media (max-width:900px){
  .th-span-3,.th-span-4,.th-span-6,.th-span-8{grid-column:span 12}
}

@media (max-width:620px){
  .th-grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .th-span-3,.th-span-4,.th-span-6,.th-span-8,.th-span-12{grid-column:span 6}
  .th-foot-grid{grid-template-columns:1fr}
  .th-foot-col:first-child{grid-column:span 1}
  .th-foot-legal{flex-direction:column;align-items:flex-start}
  .th-sec-head{gap:2px 10px}
}

/* ---------- 9. 无障碍与减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .th-btn:hover,.th-card:hover,.th-panel--hover:hover{transform:none}
  .th-media:hover{transition:none}
}
@media (forced-colors: active){
  .th-tag,.th-btn,.th-quick-link,.th-nav-toggle{border:1px solid ButtonBorder}
}