/* ============================================================
   完美体育赛事 · 全站共享样式 /assets/site.css
   深夜转播间 × 心跳监测仪
   ============================================================ */

:root{
  --ink:#081226;
  --midnight:#0F1F3A;
  --glass:#1B3152;
  --pulse:#FF3B5C;
  --signal:#00E5C7;
  --amber:#FFA24A;
  --fog:#E9EEF6;
  --steel:#8FA1BC;
  --deep-teal:#0B7F73;
  --white:#FFFFFF;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",Georgia,serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","SFMono-Regular",Consolas,"Courier New",monospace;

  --maxw:1260px;
  --gutter:clamp(18px,4vw,48px);
  --header-h:64px;
  --radius:2px;
  --line:rgba(143,161,188,.20);
  --line-strong:rgba(143,161,188,.36);
}

@media (min-width:961px){
  :root{ --header-h:78px; }
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  overflow-x:hidden;
  scroll-behavior:smooth;
  background:var(--ink);
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,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;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
hr{border:0}
table{border-collapse:collapse;width:100%}

body{
  background-color:var(--ink);
  color:var(--fog);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  position:relative;
}

/* 电子屏网格 + 双侧脉冲辉光 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 10% -10%, rgba(0,229,199,.11), transparent 62%),
    radial-gradient(760px 460px at 94% 2%, rgba(255,59,92,.12), transparent 64%),
    linear-gradient(180deg, rgba(15,31,58,.62), rgba(8,18,38,0) 34%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(rgba(143,161,188,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143,161,188,.055) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 26%, #000 0%, transparent 78%);
  mask-image:radial-gradient(circle at 50% 26%, #000 0%, transparent 78%);
}

#main-content,
.site-footer{ position:relative; z-index:1 }

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.18;
  letter-spacing:.01em;
  color:var(--white);
}
h1{font-size:clamp(2.1rem,5.8vw,4.4rem)}
h2{font-size:clamp(1.55rem,3.3vw,2.5rem)}
h3{font-size:clamp(1.12rem,1.8vw,1.45rem)}
h4{font-size:clamp(1rem,1.35vw,1.12rem);font-weight:800}

p{max-width:78ch}
strong{color:var(--white);font-weight:700}

.mono,.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.num{font-size:1.05em}

.lede{
  font-size:clamp(1rem,1.5vw,1.14rem);
  line-height:1.85;
  color:#C6D2E4;
  max-width:62ch;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--signal);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:currentColor;
  flex:none;
}
.section-title{margin-top:14px}
.section-lede{margin-top:14px}

/* ---------- 容器 / 分区 / 网格 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:880px}
.container--wide{max-width:1440px}

.section{padding-block:clamp(46px,7.5vw,104px);position:relative}
.section--tight{padding-block:clamp(30px,4.6vw,60px)}
.section-head{margin-bottom:clamp(24px,3.4vw,48px)}

.grid{
  display:grid;
  gap:clamp(16px,2.4vw,32px);
  min-width:0;
}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid > *{min-width:0}

@media (min-width:961px){
  .offset-1{margin-top:34px}
  .offset-2{margin-top:68px}
}

/* ---------- 面板 / 框景 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,30px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg, rgba(27,49,82,.70), rgba(15,31,58,.88));
  -webkit-backdrop-filter:blur(10px) saturate(130%);
  backdrop-filter:blur(10px) saturate(130%);
  transition:border-color .25s ease, background .25s ease, transform .25s ease;
}
.panel:hover{
  border-color:rgba(0,229,199,.42);
  background:linear-gradient(180deg, rgba(31,58,96,.82), rgba(15,31,58,.92));
}
.panel--solid{
  background:var(--midnight);
  -webkit-backdrop-filter:none;
  backdrop-filter:none;
  border-color:var(--line-strong);
}
.panel--pulse{
  border-color:rgba(255,59,92,.42);
  background:linear-gradient(180deg, rgba(255,59,92,.10), rgba(15,31,58,.9));
}
.panel--tick::before,
.panel--tick::after{
  content:"";
  position:absolute;
  width:13px;
  height:13px;
  border:1px solid var(--signal);
  opacity:.75;
  pointer-events:none;
}
.panel--tick::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.panel--tick::after{bottom:-1px;right:-1px;border-left:0;border-top:0}

.frame{
  position:relative;
  border:1px solid var(--line);
  background:rgba(15,31,58,.34);
  padding:clamp(20px,3.2vw,44px);
}
.frame::before{
  content:"";
  position:absolute;
  inset:-1px;
  pointer-events:none;
  background-image:
    linear-gradient(var(--signal),var(--signal)),
    linear-gradient(var(--signal),var(--signal)),
    linear-gradient(var(--signal),var(--signal)),
    linear-gradient(var(--signal),var(--signal));
  background-repeat:no-repeat;
  background-size:16px 2px, 2px 16px, 16px 2px, 2px 16px;
  background-position:left top, left top, right bottom, right bottom;
  opacity:.85;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  font-family:var(--font-body);
  font-weight:700;
  font-size:14px;
  letter-spacing:.06em;
  border:1px solid transparent;
  border-radius:var(--radius);
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease, background .2s ease, color .2s ease,
             border-color .2s ease, box-shadow .2s ease;
}
.btn--pulse{
  background:var(--pulse);
  color:var(--white);
  box-shadow:0 12px 34px -18px rgba(255,59,92,.95);
}
.btn--pulse:hover{background:#FF5570;transform:translateY(-2px)}
.btn--signal{background:var(--signal);color:#04121A}
.btn--signal:hover{background:#3DF1D8;transform:translateY(-2px)}
.btn--ghost{border-color:var(--line-strong);color:var(--fog)}
.btn--ghost:hover{border-color:var(--signal);color:var(--white);background:rgba(0,229,199,.09)}
.btn--amber{border-color:rgba(255,162,74,.48);color:var(--amber)}
.btn--amber:hover{background:rgba(255,162,74,.12);color:#FFC189}
.btn--block{width:100%}

/* ---------- 标签 / 状态 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--steel);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  white-space:nowrap;
}
.tag--pulse{color:var(--pulse);border-color:rgba(255,59,92,.45);background:rgba(255,59,92,.09)}
.tag--signal{color:var(--signal);border-color:rgba(0,229,199,.40);background:rgba(0,229,199,.07)}
.tag--amber{color:var(--amber);border-color:rgba(255,162,74,.44);background:rgba(255,162,74,.09)}

.dot{
  display:inline-block;
  width:7px;
  height:7px;
  border-radius:50%;
  background:currentColor;
  position:relative;
  flex:none;
}
.dot--live{color:var(--amber)}
.dot--live::after{
  content:"";
  position:absolute;
  inset:-4px;
  border-radius:50%;
  border:1px solid currentColor;
  animation:ping 1.9s ease-out infinite;
}
@keyframes ping{
  0%{transform:scale(.55);opacity:.9}
  70%{transform:scale(1.9);opacity:0}
  100%{transform:scale(1.9);opacity:0}
}

.pulse-rule{
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(0,229,199,.55) 22%, rgba(255,59,92,.55) 58%, transparent);
}
.hairline{height:1px;background:var(--line)}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(135deg, rgba(27,49,82,.95), rgba(8,18,38,.98));
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:0;
  transition:opacity .4s ease;
  background:linear-gradient(115deg, transparent 40%, rgba(0,229,199,.16) 50%, transparent 60%);
}
.media:hover::after{opacity:1}
.media img,
.media video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--wide{aspect-ratio:21 / 9}
.media--portrait{aspect-ratio:3 / 4}
.media--square{aspect-ratio:1 / 1}
.media--tilt{clip-path:polygon(0 0,100% 0,100% 88%,0 100%)}

.media-caption{
  display:flex;
  gap:10px;
  align-items:baseline;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--steel);
}
.media-caption::before{content:"▍";color:var(--signal);flex:none}

/* ---------- 正文排版 ---------- */
.prose{
  color:#C9D5E6;
  font-size:clamp(15px,1.15vw,17px);
  line-height:1.92;
}
.prose > * + *{margin-top:1.15em}
.prose h2{margin-top:2.3em;font-size:clamp(1.4rem,2.6vw,2rem)}
.prose h3{margin-top:1.8em}
.prose a{color:var(--signal);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--white)}
.prose ul{list-style:none}
.prose ol{list-style:decimal;padding-left:1.4em}
.prose ul li{position:relative;padding-left:1.15em}
.prose ul li::before{content:"—";position:absolute;left:0;color:var(--pulse)}
.prose li + li{margin-top:.45em}
.prose blockquote{
  border-left:2px solid var(--signal);
  padding-left:18px;
  color:var(--steel);
}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  padding:2px 6px;
  border-radius:var(--radius);
  background:rgba(27,49,82,.85);
  color:var(--signal);
}
.prose img{border:1px solid var(--line)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--steel);
}
.breadcrumb li{display:inline-flex;align-items:center}
.breadcrumb li::after{content:"/";margin:0 8px;color:rgba(143,161,188,.5)}
.breadcrumb li:last-child::after{content:"";margin:0}
.breadcrumb a{color:var(--steel);transition:color .2s ease}
.breadcrumb a:hover{color:var(--signal)}
.breadcrumb [aria-current="page"]{color:var(--fog)}

/* ---------- 章节目录 ---------- */
.toc{position:sticky;top:calc(var(--header-h) + 26px)}
.toc-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--signal);
  margin-bottom:14px;
}
.toc-list{border-left:2px solid var(--line)}
.toc-link{
  display:block;
  margin-left:-2px;
  padding:8px 12px;
  font-size:13.5px;
  line-height:1.5;
  color:var(--steel);
  border-left:2px solid transparent;
  transition:color .2s ease, border-color .2s ease, background .2s ease;
}
.toc-link:hover{color:var(--fog);background:rgba(0,229,199,.06)}
.toc-link[aria-current="true"]{
  color:var(--signal);
  border-left-color:var(--signal);
  background:rgba(0,229,199,.07);
}

/* ---------- 通用辅助 ---------- */
.visually-hidden{
  position:absolute !important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  color:var(--fog);
  background:rgba(8,18,38,.86);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(143,161,188,.18);
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:10px;
  z-index:90;
  padding:10px 18px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  color:#04121A;
  background:var(--signal);
  border-radius:var(--radius);
  transform:translateY(-300%);
  transition:transform .2s ease;
  pointer-events:none;
}
.skip-link:focus,
.skip-link:focus-visible{
  transform:translateY(0);
  pointer-events:auto;
}

.header-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,3vw,40px);
}

/* 品牌体块 */
.brand{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  padding-left:14px;
  flex:none;
}
.brand-pulse{
  position:absolute;
  left:0;
  top:50%;
  width:3px;
  height:30px;
  transform:translateY(-50%);
  border-radius:2px;
  background:linear-gradient(180deg,var(--pulse),var(--signal));
  animation:brandGlow 2.4s ease-in-out infinite;
}
@keyframes brandGlow{
  0%,100%{opacity:.6;transform:translateY(-50%) scaleY(.82)}
  50%{opacity:1;transform:translateY(-50%) scaleY(1)}
}
.brand-text{display:flex;flex-direction:column;gap:1px}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(17px,2vw,21px);
  line-height:1.2;
  color:var(--white);
  letter-spacing:.03em;
}
.brand-tagline{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.34em;
  color:var(--signal);
  text-transform:uppercase;
}

/* 导航 */
.site-nav{margin-left:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.7vw,28px);
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 2px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.05em;
  color:var(--steel);
  transition:color .22s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:100%;
  bottom:3px;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--signal));
  transition:right .3s ease;
}
.nav-link:hover{color:var(--fog)}
.nav-link:hover::after{right:0}
.nav-link[aria-current="page"]{
  color:var(--white);
  font-weight:700;
}
.nav-link[aria-current="page"]::after{
  right:0;
  animation:lineFade 2.6s ease-in-out infinite;
}
@keyframes lineFade{
  0%,100%{opacity:.55}
  50%{opacity:1}
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:9px 14px;
  font-size:13px;
  letter-spacing:.1em;
  color:var(--fog);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  transition:border-color .2s ease, color .2s ease;
}
.nav-toggle:hover{border-color:var(--signal);color:var(--white)}
.nav-toggle[aria-expanded="true"]{
  border-color:var(--signal);
  color:var(--signal);
}
.nav-toggle-icon{
  display:inline-flex;
  flex-direction:column;
  gap:3px;
  width:16px;
  flex:none;
}
.nav-toggle-icon i{
  display:block;
  height:1.5px;
  width:100%;
  background:currentColor;
  transition:transform .22s ease, opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

/* 状态带 */
.header-status{
  border-top:1px solid rgba(143,161,188,.12);
  background:linear-gradient(90deg, rgba(255,59,92,.10), rgba(0,229,199,.05) 46%, transparent 80%);
}
.header-status-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:30px;
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--steel);
}
.header-status-text{
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* 滚动进度 */
.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  background:rgba(143,161,188,.12);
}
.header-progress-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--signal),var(--pulse) 72%,var(--amber));
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  margin-top:clamp(48px,8vw,120px);
  padding-top:clamp(40px,6vw,74px);
  color:var(--steel);
  background:linear-gradient(180deg, rgba(15,31,58,.62), var(--midnight) 46%);
  border-top:1px solid var(--line);
}
.footer-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:1.45fr 1fr 1fr 1fr 1.55fr;
  gap:clamp(22px,3vw,48px);
}

.footer-brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  line-height:1.3;
  color:var(--white);
  letter-spacing:.03em;
}
.footer-brand-mark{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.34em;
  color:var(--signal);
  text-transform:uppercase;
}
.footer-domain{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(143,161,188,.72);
  word-break:break-all;
  max-width:none;
}

.footer-col-title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--signal);
  margin-bottom:14px;
}
.footer-links li + li{margin-top:2px}
.footer-link{
  display:inline-block;
  padding:6px 0;
  font-size:14px;
  color:var(--steel);
  border-bottom:1px solid transparent;
  transition:color .2s ease, border-color .2s ease;
}
.footer-link:hover{color:var(--white);border-bottom-color:var(--pulse)}

.contact-list{display:grid;gap:2px}
.contact-row{
  display:grid;
  grid-template-columns:42px 1fr auto;
  gap:10px;
  align-items:baseline;
  padding:8px 0;
  border-bottom:1px dashed rgba(143,161,188,.16);
  font-size:13.5px;
}
.contact-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:rgba(143,161,188,.72);
}
.contact-value{
  color:var(--fog);
  word-break:break-all;
  line-height:1.6;
}
.copy-chip{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  padding:2px 7px;
  color:var(--signal);
  border:1px solid rgba(0,229,199,.35);
  border-radius:var(--radius);
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}
.copy-chip:hover{background:rgba(0,229,199,.13)}
.copy-chip.is-done{color:var(--amber);border-color:rgba(255,162,74,.5);background:rgba(255,162,74,.12)}
.contact-note{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(143,161,188,.82);
}

.footer-feedback{
  margin-top:clamp(34px,4.4vw,58px);
  border-top:1px solid rgba(255,59,92,.26);
  background:linear-gradient(90deg, rgba(255,59,92,.11), rgba(15,31,58,.22) 58%, transparent);
}
.footer-feedback-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(16px,2.2vw,26px) var(--gutter);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.footer-feedback-text{
  font-size:14px;
  line-height:1.7;
  color:var(--fog);
  max-width:56ch;
}

.footer-baseline{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:18px var(--gutter) 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(143,161,188,.78);
  border-top:1px solid rgba(143,161,188,.12);
}

/* ============================================================
   返回顶部（JS 注入）
   ============================================================ */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--fog);
  background:rgba(15,31,58,.94);
  border:1px solid rgba(0,229,199,.4);
  border-radius:var(--radius);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease, transform .25s ease, visibility .25s ease,
             border-color .2s ease, color .2s ease;
}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--pulse);color:var(--white)}
.to-top-arrow{font-size:14px;line-height:1;color:var(--signal)}
.to-top:hover .to-top-arrow{color:var(--pulse)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .footer-inner{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    padding:8px var(--gutter) 22px;
    background:rgba(9,20,40,.985);
    border-top:1px solid rgba(0,229,199,.22);
    border-bottom:1px solid rgba(0,229,199,.18);
    box-shadow:0 34px 64px -34px rgba(0,0,0,.95);
    max-height:calc(100vh - 110px);
    overflow-y:auto;
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
  }
  .site-nav[data-open]{display:block}
  .nav-list{display:block}
  .nav-item{border-bottom:1px solid rgba(143,161,188,.14)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{
    display:block;
    padding:15px 12px;
    font-size:15.5px;
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{
    color:var(--signal);
    box-shadow:inset 3px 0 0 var(--signal);
    background:rgba(0,229,199,.06);
  }
  .grid--3,
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  .header-status{display:none}
  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:1fr}
  .panel{padding:18px}
  .contact-row{grid-template-columns:36px 1fr auto;font-size:13px}
}

@media (max-width:640px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-feedback-inner{flex-direction:column;align-items:flex-start}
  .footer-feedback .btn{width:100%}
}

@media (max-width:420px){
  .footer-inner{grid-template-columns:1fr}
  .footer-baseline{flex-direction:column;align-items:flex-start}
}

/* ---------- 焦点可见 ---------- */
:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:3px;
  border-radius:var(--radius);
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible){outline:none}

/* ---------- 锚点定位 ---------- */
[id]{scroll-margin-top:calc(var(--header-h) + 26px)}

/* ---------- 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;
  }
  .brand-pulse{opacity:.9;transform:translateY(-50%) scaleY(1)}
  .nav-link[aria-current="page"]::after{opacity:1}
  .to-top{transform:none}
}