/* =========================================================
   /assets/site.css — 半岛体育看台 共享外壳样式
   深海夜场 + 数据室：切角面板、扫描线、等宽数据
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  /* 背景层 */
  --navy-950:#05131F;
  --navy-800:#0A2233;
  --navy-700:#123246;
  --tide:#1D6A82;
  /* 信号层 */
  --green:#35E08A;
  --green-deep:#1B8F58;
  --amber:#FF9F45;
  --amber-deep:#C2661A;
  /* 分区层 */
  --indigo:#3B2A6E;
  --wine:#6C2540;
  /* 文字层 */
  --paper:#EAF2F7;
  --ink-900:#04101A;
  --mist:#9CB4C3;
  --mist-dim:#5B7A8C;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"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,"Courier New",monospace;

  --shell:1280px;
  --gutter:24px;
  --cut:18px;
  --head-h:78px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--navy-950);
  background-image:
    radial-gradient(120% 68% at 10% -12%, rgba(29,106,130,.32), transparent 62%),
    radial-gradient(88% 52% at 98% 2%, rgba(53,224,138,.10), transparent 58%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.78;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit}
a{color:var(--green);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#5BEBA2}
main{display:block}
main,section,[id]{scroll-margin-top:112px}

/* ---------- 3. 焦点与动效基座 ---------- */
:focus{outline:none}
:focus-visible{
  outline:2px solid var(--green);
  outline-offset:2px;
  box-shadow:0 0 0 2px var(--navy-950);
  border-radius:2px;
}

/* ---------- 4. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:calc(var(--shell) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:calc(860px + var(--gutter) * 2)}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-64px;
  z-index:120;
  display:inline-block;
  padding:10px 16px;
  background:var(--green);
  color:var(--ink-900);
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  letter-spacing:.05em;
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:top .16s var(--ease);
}
.skip-link:focus{top:12px;color:var(--ink-900)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  border:1px solid transparent;
  background:transparent;
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  line-height:1.2;
  letter-spacing:.06em;
  text-decoration:none;
  cursor:pointer;
  white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:transform .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease);
}
.btn--signal{background:var(--green);border-color:var(--green);color:var(--ink-900)}
.btn--signal:hover{background:#2BC97C;border-color:#2BC97C;color:var(--ink-900);transform:translateY(-2px)}
.btn--ghost{background:transparent;border-color:var(--tide);color:var(--paper)}
.btn--ghost:hover{border-color:var(--green);color:var(--green);transform:translateY(-2px)}

.icon-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  border:1px solid var(--tide);
  background:var(--navy-800);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.icon-btn:hover{border-color:var(--green);color:var(--green);transform:translateY(-2px)}
.icon-btn[aria-expanded="true"]{border-color:var(--green);color:var(--green)}
.icon-btn__glyph{
  width:12px;height:12px;flex:none;
  border:1.5px solid currentColor;
  border-radius:50%;
  position:relative;
}
.icon-btn__glyph::after{
  content:"";position:absolute;right:-4px;bottom:-3px;
  width:6px;height:1.5px;background:currentColor;
  transform:rotate(45deg);
}

.copy-btn{
  margin-left:8px;
  padding:3px 8px;
  border:1px solid rgba(53,224,138,.4);
  background:rgba(53,224,138,.06);
  color:var(--green);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  cursor:pointer;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.copy-btn:hover{background:rgba(53,224,138,.16);border-color:var(--green)}
.copy-btn[data-copied]{background:var(--amber);border-color:var(--amber);color:var(--ink-900)}

/* ---------- 7. 页头 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:90;
  background:linear-gradient(180deg,#08202F 0%,#05131F 100%);
  border-bottom:1px solid rgba(29,106,130,.6);
  color:var(--paper);
}
.site-head__scan{
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(234,242,247,.05) 0 1px,transparent 1px 3px);
  opacity:.9;
}
.site-head__inner{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:32px;
  min-height:var(--head-h);
}

/* 品牌署名 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  color:var(--paper);
  text-decoration:none;
}
.brand:hover{color:var(--paper)}
.brand__mark{
  position:relative;
  width:36px;height:36px;
  flex:none;
  background:var(--navy-700);
  box-shadow:inset 0 0 0 1px var(--tide);
  clip-path:polygon(0 7px,7px 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%);
  overflow:hidden;
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:-10%;right:-10%;top:38%;
  height:22%;
  background:linear-gradient(90deg,var(--green),rgba(53,224,138,.25));
  transform:rotate(-8deg);
}
.brand__mark::after{
  content:"";
  position:absolute;
  left:6%;right:30%;bottom:22%;
  height:2px;
  background:var(--amber);
}
.brand__text{min-width:0;display:block}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:87.5%;
  font-size:19px;
  line-height:1.24;
  letter-spacing:.06em;
  color:var(--paper);
}
.brand__line{
  display:block;
  max-width:34ch;
  font-family:var(--font-mono);
  font-size:11.5px;
  line-height:1.6;
  letter-spacing:.02em;
  color:var(--mist);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* 工具区 */
.site-head__tools{
  display:flex;
  align-items:center;
  gap:10px;
  justify-self:end;
}
.stamp{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 10px;
  border:1px solid rgba(255,159,69,.45);
  background:rgba(255,159,69,.08);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
}
.stamp::before{
  content:"";
  width:6px;height:6px;
  flex:none;
  background:var(--amber);
  box-shadow:0 0 0 3px rgba(255,159,69,.18);
}

/* 导航 */
.site-nav{justify-self:end;min-width:0}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav__list a{
  display:block;
  padding:8px 11px;
  border-bottom:2px solid transparent;
  color:var(--mist);
  font-family:var(--font-display);
  font-weight:600;
  font-size:14.5px;
  letter-spacing:.04em;
  text-decoration:none;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.site-nav__list a:hover{color:var(--paper)}
.site-nav__list a[aria-current="page"]{
  color:var(--green);
  border-bottom-color:var(--green);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  border:1px solid var(--tide);
  background:var(--navy-800);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle__bars{
  display:block;
  width:16px;height:10px;flex:none;
  background-image:linear-gradient(180deg,
    currentColor 0 2px,transparent 2px 4px,
    currentColor 4px 6px,transparent 6px 8px,
    currentColor 8px 10px);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--green);color:var(--green)}

/* 检索抽屉 */
.search-drawer{
  position:absolute;
  left:0;
  right:0;
  top:100%;
  z-index:95;
  background:linear-gradient(180deg,#0A2233,#08202F);
  border-bottom:1px solid var(--green);
  box-shadow:0 22px 48px rgba(4,16,26,.72);
}
.search-drawer[hidden]{display:none}
.search-drawer__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 18px;
  padding-block:20px 22px;
}
.search-drawer__label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--amber);
  white-space:nowrap;
}
.search-drawer__input{
  flex:1 1 260px;
  min-width:0;
  padding:11px 14px;
  border:1px solid var(--tide);
  background:var(--navy-950);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.02em;
  transition:border-color .16s var(--ease);
}
.search-drawer__input::placeholder{color:var(--mist-dim)}
.search-drawer__input:focus{border-color:var(--green)}
.search-drawer__hint{
  flex:1 1 100%;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--mist);
}

/* ---------- 8. 页脚 ---------- */
.site-foot{
  position:relative;
  margin-top:120px;
  background:linear-gradient(180deg,#05131F 0%,#08202F 100%);
  border-top:1px solid rgba(29,106,130,.5);
}
.site-foot__band{
  display:block;
  height:5px;
  background:linear-gradient(90deg,
    var(--green) 0 30%,
    var(--amber) 30% 48%,
    var(--indigo) 48% 76%,
    var(--wine) 76% 100%);
  clip-path:polygon(0 2px,100% 0,100% 100%,0 100%);
}
.site-foot__inner{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.5fr;
  gap:40px;
  padding-block:64px 44px;
}
.foot-brand__name{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:87.5%;
  font-size:22px;
  letter-spacing:.06em;
  color:var(--paper);
  text-decoration:none;
}
.foot-brand__name:hover{color:var(--green)}
.foot-brand__note{
  margin-top:12px;
  max-width:34ch;
  font-size:14.5px;
  line-height:1.8;
  color:var(--mist);
}
.foot-brand__note--dim{color:var(--mist-dim);font-size:13px}
.foot-col__title{
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(29,106,130,.5);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--amber);
}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list__item{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:4px;
  font-size:14.5px;
  line-height:1.7;
  color:var(--mist);
}
.foot-list__item--stack{flex-direction:column;gap:2px}
.foot-list__item a{
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.foot-list__item a:hover{color:var(--green);border-bottom-color:rgba(53,224,138,.5)}
.foot-list--contact .foot-list__item{gap:6px}
.foot-list__key{
  flex:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--tide);
  text-transform:uppercase;
}
.foot-list__val{
  font-family:var(--font-mono);
  font-size:13.5px;
  color:var(--paper);
  word-break:break-all;
}
.site-foot__base{
  display:flex;
  flex-wrap:wrap;
  gap:10px 32px;
  align-items:baseline;
  justify-content:space-between;
  padding-top:20px;
  padding-bottom:48px;
  border-top:1px solid rgba(29,106,130,.32);
}
.site-foot__legal{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mist);
}
.site-foot__fine{
  max-width:70ch;
  font-size:12.5px;
  line-height:1.7;
  color:var(--mist-dim);
}

/* ---------- 9. 通用组件 ---------- */
/* 切角面板 */
.panel{
  position:relative;
  padding:24px;
  background:var(--navy-800);
  border:1px solid var(--tide);
  transition:transform .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.panel::after{
  content:"";
  position:absolute;
  right:-1px;bottom:-1px;
  width:calc(var(--cut) + 1px);
  height:calc(var(--cut) + 1px);
  background:linear-gradient(135deg,var(--navy-800) 0 48%,var(--navy-950) 48% 100%);
  border-left:1px solid var(--tide);
  border-top:1px solid var(--tide);
  pointer-events:none;
  transition:border-color .16s var(--ease);
}
.panel:hover{transform:translateY(-2px);border-color:var(--green)}
.panel:hover::after{border-color:var(--green)}
.panel--flat::after{display:none}
.panel--indigo{background:rgba(59,42,110,.42);border-color:rgba(59,42,110,.9)}
.panel--wine{background:rgba(108,37,64,.36);border-color:rgba(108,37,64,.9)}
.panel--paper{background:var(--paper);border-color:var(--paper);color:var(--ink-900)}
.panel--paper::after{background:linear-gradient(135deg,var(--paper) 0 48%,var(--navy-950) 48% 100%);border-color:var(--paper)}
.panel--paper a{color:var(--green-deep)}
.panel--paper a:hover{color:var(--amber-deep)}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  padding:5px 9px;
  border:1px solid rgba(53,224,138,.42);
  background:rgba(53,224,138,.07);
  color:var(--green);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1;
  letter-spacing:.08em;
  white-space:nowrap;
}
.tag--amber{border-color:rgba(255,159,69,.45);background:rgba(255,159,69,.08);color:var(--amber)}
.tag--plain{border-color:rgba(156,180,195,.32);background:transparent;color:var(--mist)}

/* 数据点 */
.stat{display:block}
.stat__value{
  display:inline-block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(28px,4vw,56px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--paper);
}
.stat__value--amber{
  color:var(--amber);
  border-bottom:3px solid rgba(255,159,69,.5);
}
.stat__value--green{color:var(--green)}
.stat__label{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--mist);
}

/* 章节标题 */
.section-head{position:relative;margin-bottom:36px;padding-left:clamp(0px,3vw,56px)}
.section-head::before{
  content:"";
  position:absolute;
  left:0;top:14px;
  width:clamp(0px,2vw,34px);
  height:2px;
  background:var(--tide);
  transition:background-color .16s var(--ease);
}
[data-section][data-in-view] .section-head::before{background:var(--green)}
.section-head__num{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--amber);
}
.section-head__title{
  margin:8px 0 12px;
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:87.5%;
  font-size:clamp(1.6rem,3vw,2.6rem);
  line-height:1.22;
  letter-spacing:.02em;
  color:var(--paper);
}
.section-head__lede{
  max-width:58ch;
  font-size:16px;
  line-height:1.8;
  color:var(--mist);
}

/* 图片容器 */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  border:1px solid var(--tide);
  background:
    radial-gradient(120% 90% at 18% 0%,rgba(53,224,138,.16),transparent 62%),
    radial-gradient(80% 70% at 100% 100%,rgba(255,159,69,.12),transparent 60%),
    linear-gradient(160deg,#0A2233,#04101A);
}
.media-frame img,
.media-frame video{width:100%;height:100%;object-fit:cover}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame__cap{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 14px;
  background:linear-gradient(180deg,rgba(4,16,26,0),rgba(4,16,26,.86));
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--paper);
}

/* 栅格 */
.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}

/* 正文 */
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.8;
  color:#D6E4EC;
}
.prose h2{
  margin:48px 0 16px;
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:87.5%;
  font-size:clamp(1.4rem,2.4vw,2rem);
  line-height:1.3;
  color:var(--paper);
}
.prose h3{
  margin:32px 0 12px;
  font-size:1.15rem;
  font-weight:700;
  color:var(--paper);
}
.prose p{margin:0 0 1.15em}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{margin:0 0 1.15em;padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose strong{color:var(--paper);font-weight:700}
.prose code{
  font-family:var(--font-mono);
  font-size:.92em;
  padding:2px 6px;
  border:1px solid rgba(29,106,130,.7);
  background:rgba(18,50,70,.6);
  color:var(--green);
}
.prose blockquote{
  margin:28px 0;
  padding:16px 22px;
  border-left:3px solid var(--green);
  background:rgba(29,106,130,.14);
  color:var(--mist);
}

/* 面包屑 */
.breadcrumbs{
  margin-block:28px 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--tide)}
.breadcrumbs a{color:var(--mist);text-decoration:none}
.breadcrumbs a:hover{color:var(--green)}
.breadcrumbs [aria-current="page"]{color:var(--amber)}

/* 检索隐藏态 */
[data-search-hidden]{display:none !important}

/* ---------- 10. 滚动进度与回到顶部 ---------- */
.progress-rail{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:110;
  pointer-events:none;
  background:rgba(29,106,130,.35);
}
.progress-rail__bar{
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--green),var(--amber));
  transition:width .1s linear;
}
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:100;
  display:grid;
  place-items:center;
  width:44px;height:44px;
  padding:0;
  border:1px solid var(--tide);
  background:var(--navy-800);
  color:var(--green);
  font-family:var(--font-mono);
  font-size:17px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transition:opacity .16s var(--ease),visibility .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--green);transform:translateY(-2px)}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1080px){
  .site-head__inner{
    grid-template-columns:minmax(0,1fr) auto;
    gap:10px;
    min-height:64px;
  }
  .brand__line{display:none}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:94;
    display:none;
    justify-self:stretch;
    max-height:min(72vh,540px);
    overflow-y:auto;
    padding:8px var(--gutter) 18px;
    background:linear-gradient(180deg,#0A2233,#08202F);
    border-bottom:1px solid var(--tide);
    box-shadow:0 24px 50px rgba(4,16,26,.72);
  }
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__list a{
    padding:14px 4px;
    border-bottom:1px solid rgba(29,106,130,.28);
    border-left:3px solid transparent;
    font-size:16px;
  }
  .site-nav__list a[aria-current="page"]{
    border-bottom-color:rgba(29,106,130,.28);
    border-left-color:var(--green);
    background:rgba(53,224,138,.06);
  }
  .site-nav__item:last-child a{border-bottom:0}
  .nav-toggle{display:inline-flex}
  .site-foot__inner{grid-template-columns:1fr 1fr;gap:36px 32px}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-3,.col-4{grid-column:span 3}
  .col-5,.col-6,.col-7{grid-column:span 6}
  .col-8,.col-9{grid-column:span 6}
}

@media (max-width:720px){
  body{font-size:16.5px}
  .stamp{display:none}
  .brand__mark{width:32px;height:32px}
  .brand__name{font-size:17.5px}
  .search-drawer__inner{padding-block:16px 18px}
  .site-foot{margin-top:88px}
  .site-foot__inner{grid-template-columns:1fr;gap:32px;padding-block:48px 32px}
  .site-foot__base{flex-direction:column;align-items:flex-start;padding-bottom:40px}
}

@media (max-width:560px){
  .btn--signal{display:none}
  .site-head__tools{gap:8px}
  .section-head{padding-left:0}
  .section-head::before{display:none}
  .grid--12{grid-template-columns:minmax(0,1fr)}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:span 1}
  .to-top{right:14px;bottom:14px}
}

/* ---------- 12. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .btn:hover,
  .icon-btn:hover,
  .panel:hover,
  .to-top:hover{transform:none !important}
  .progress-rail__bar{transition:none}
}