/* ==========================================================================
   欧凯赛场 · 共享样式表  /assets/site.css
   01 设计变量 / 02 重置 / 03 排版 / 04 容器与栅格 / 05 通用元件
   06 图片容器 / 07 头部 / 08 页脚 / 09 滚动交互 / 10 响应式 / 11 动效降级
   ========================================================================== */

/* 01 设计变量 ------------------------------------------------------------ */
:root{
  --ink-navy:#0A1A2F;
  --mid-navy:#12305A;
  --bright-blue:#2A6FDB;
  --pulse-orange:#FF6A1A;
  --hover-amber:#FF9A3D;
  --data-lime:#C6FF3D;
  --warm-paper:#F4EDE1;
  --paper-white:#FFFDF8;
  --ink-text:#1D1D1D;
  --mist-grey:#7A8595;
  --alert-red:#E2453B;

  --on-navy-dim:#93A9C6;
  --on-navy-line:rgba(244,237,225,.20);

  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --edge:2px;
  --radius:2px;
  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --shadow-hard:6px 6px 0 0 var(--ink-navy);
  --shadow-hard-orange:6px 6px 0 0 var(--pulse-orange);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* 02 重置 ---------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}

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

body{
  margin:0;
  min-height:100vh;
  background-color:var(--warm-paper);
  background-image:repeating-linear-gradient(180deg,rgba(10,26,47,.035) 0 1px,transparent 1px 40px);
  color:var(--ink-text);
  font-family:var(--font-sans);
  font-size:clamp(16px,.35vw + 15px,18px);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,svg,video,picture{display:block;max-width:100%}
img{height:auto}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
::selection{background:var(--pulse-orange);color:var(--ink-navy)}
:focus-visible{outline:2px solid var(--pulse-orange);outline-offset:2px}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:absolute;
  top:0;left:-9999px;
  z-index:120;
  padding:12px 18px;
  background:var(--data-lime);
  color:var(--ink-navy);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:800;
  letter-spacing:.1em;
  text-decoration:none;
  border:var(--edge) solid var(--ink-navy);
  border-radius:var(--radius);
}
.skip-link:focus{
  position:fixed;
  left:16px;
  top:14px;
}

/* 03 排版 ---------------------------------------------------------------- */
h1,h2,h3,h4,h5{
  margin:0 0 .55em;
  font-weight:900;
  font-style:italic;
  letter-spacing:-.02em;
  line-height:1.06;
  color:var(--ink-navy);
  text-wrap:balance;
}
h1{font-size:clamp(2.4rem,6vw,4.6rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.6rem)}
h3{font-size:clamp(1.18rem,1.9vw,1.5rem)}
h4{font-size:1.06rem}
h5{font-size:.95rem;letter-spacing:0}

p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}

a{
  color:var(--bright-blue);
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:.18em;
  transition:color .16s var(--ease);
}
a:hover{color:var(--pulse-orange)}
strong,b{font-weight:800;color:var(--ink-navy)}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.01em;
}

.idx{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.68rem;
  line-height:1.4;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist-grey);
}

/* 04 容器与栅格 ---------------------------------------------------------- */
.shell,
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.prose{max-width:74ch}
.prose p{margin-bottom:1.25em}
.prose h2{margin:2.4em 0 .7em}
.prose h3{margin:1.8em 0 .6em}
.prose ul{list-style:disc;padding-left:1.35em;margin-bottom:1.25em}
.prose ol{list-style:decimal;padding-left:1.45em;margin-bottom:1.25em}
.prose li{margin-bottom:.45em}

.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.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--main-side{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
.grid--side-main{grid-template-columns:minmax(0,4fr) minmax(0,7fr)}

/* 05 通用元件 ------------------------------------------------------------ */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 14px;
  margin-bottom:clamp(16px,2.4vw,28px);
  padding-bottom:12px;
  border-bottom:var(--edge) solid var(--ink-navy);
}
.section-head__no{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--pulse-orange);
}

.breadcrumb{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--mist-grey);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--pulse-orange)}
.breadcrumb a{color:var(--ink-text);text-decoration:none;border-bottom:2px solid transparent}
.breadcrumb a:hover{color:var(--pulse-orange);border-color:var(--pulse-orange)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  background:var(--paper-white);
  color:var(--ink-navy);
  border:var(--edge) solid var(--ink-navy);
  border-radius:var(--radius);
  box-shadow:4px 4px 0 0 var(--ink-navy);
  font-family:var(--font-sans);
  font-size:.88rem;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),
             background-color .16s var(--ease),color .16s var(--ease);
}
.btn:hover{
  color:var(--ink-navy);
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 0 var(--ink-navy);
}
.btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 0 var(--ink-navy)}
.btn:focus-visible{outline:2px solid var(--pulse-orange);outline-offset:3px}

.btn--cta{
  background:var(--pulse-orange);
  border-color:var(--pulse-orange);
  color:var(--ink-navy);
  box-shadow:4px 4px 0 0 rgba(10,26,47,.45);
}
.btn--cta:hover{
  background:var(--hover-amber);
  border-color:var(--hover-amber);
  color:var(--ink-navy);
  box-shadow:6px 6px 0 0 rgba(10,26,47,.45);
}
.btn--ghost{
  background:transparent;
  color:var(--warm-paper);
  border-color:var(--warm-paper);
  box-shadow:4px 4px 0 0 rgba(255,106,26,.55);
}
.btn--ghost:hover{
  color:var(--warm-paper);
  background:var(--mid-navy);
  box-shadow:6px 6px 0 0 rgba(255,106,26,.55);
}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:800;
  color:var(--ink-navy);
  text-decoration:none;
}
.link-arrow::after{
  content:"→";
  font-family:var(--font-mono);
  color:var(--pulse-orange);
  transition:transform .18s var(--ease);
}
.link-arrow:hover{color:var(--ink-navy)}
.link-arrow:hover::after{transform:translateX(4px)}

.card{
  position:relative;
  padding:clamp(16px,2.2vw,26px);
  background:var(--paper-white);
  border:var(--edge) solid var(--ink-navy);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
}
.card h2,.card h3,.card h4{margin-bottom:.45em}
.card--dark{
  background:var(--mid-navy);
  color:var(--warm-paper);
  box-shadow:var(--shadow-hard-orange);
}
.card--dark h2,.card--dark h3,.card--dark h4{color:var(--warm-paper)}
.card--dark a{color:var(--data-lime)}
.card--orange{
  background:var(--pulse-orange);
  color:var(--ink-navy);
  box-shadow:var(--shadow-hard);
}
.card--flat{box-shadow:none}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:2px 8px;
  background:var(--paper-white);
  color:var(--ink-navy);
  border:var(--edge) solid var(--ink-navy);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag--live{background:var(--data-lime)}
.tag--hot{background:var(--pulse-orange)}
.tag--quiet{background:var(--warm-paper);border-color:var(--mist-grey);color:#4A5568}
.card--dark .tag{background:transparent;border-color:var(--on-navy-line);color:var(--warm-paper)}

/* 06 图片容器 ------------------------------------------------------------ */
.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--mid-navy);
  border:var(--edge) solid var(--ink-navy);
  border-radius:var(--radius);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.media:hover img{transform:scale(1.03)}
.media--wide{aspect-ratio:21 / 9}
.media--tall{aspect-ratio:4 / 5}
.media--square{aspect-ratio:1 / 1}

.media__ph{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:12px;
  background-color:var(--mid-navy);
  background-image:repeating-linear-gradient(135deg,rgba(244,237,225,.07) 0 12px,transparent 12px 24px);
  color:var(--on-navy-dim);
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  text-align:center;
}

.media__badge{
  position:absolute;
  left:10px;
  top:10px;
  z-index:2;
  padding:3px 9px;
  background:var(--data-lime);
  color:var(--ink-navy);
  border:var(--edge) solid var(--ink-navy);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.6rem;
  font-weight:700;
  letter-spacing:.1em;
  text-transform:uppercase;
}

/* 07 头部 ---------------------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background-color:var(--ink-navy);
  background-image:linear-gradient(90deg,rgba(42,111,219,.20),transparent 46%);
  color:var(--warm-paper);
  border-bottom:var(--edge) solid var(--pulse-orange);
}

.header-inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  grid-template-areas:"brand nav actions";
  align-items:center;
  gap:clamp(10px,1.8vw,26px);
  min-height:74px;
  padding-block:10px;
}

.brand{
  grid-area:brand;
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--warm-paper);
  text-decoration:none;
}
.brand:hover{color:var(--warm-paper)}
.brand-mark{
  display:grid;
  place-items:center;
  width:44px;
  height:38px;
  background:var(--pulse-orange);
  color:var(--ink-navy);
  border:var(--edge) solid var(--warm-paper);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.06em;
  transform:skewX(-8deg);
  transition:background-color .16s var(--ease);
}
.brand:hover .brand-mark{background:var(--hover-amber)}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{
  font-size:1.1rem;
  font-weight:900;
  font-style:italic;
  letter-spacing:-.01em;
  line-height:1.15;
}
.brand-tag{
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.1em;
  line-height:1.3;
  color:var(--on-navy-dim);
}

.site-nav{grid-area:nav;justify-self:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 12px;
  color:var(--warm-paper);
  border:var(--edge) solid transparent;
  border-radius:var(--radius);
  font-size:.86rem;
  font-weight:700;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease);
}
.nav-index{
  font-family:var(--font-mono);
  font-size:.58rem;
  letter-spacing:.06em;
  color:var(--on-navy-dim);
  transition:color .16s var(--ease);
}
.nav-link:hover{background:var(--mid-navy);color:var(--warm-paper)}
.nav-link:hover .nav-index{color:var(--data-lime)}
.nav-link[aria-current="page"]{
  background:var(--warm-paper);
  color:var(--ink-navy);
  border-color:var(--pulse-orange);
}
.nav-link[aria-current="page"]:hover{background:var(--warm-paper);color:var(--ink-navy)}
.nav-link[aria-current="page"] .nav-index{color:var(--pulse-orange)}

.header-actions{
  grid-area:actions;
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.live-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 10px;
  border:var(--edge) solid var(--on-navy-line);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--on-navy-dim);
  white-space:nowrap;
}
.live-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--data-lime);
  animation:ok-pulse 30s linear infinite;
}
@keyframes ok-pulse{
  0%{box-shadow:0 0 0 0 rgba(198,255,61,.75)}
  1.5%{box-shadow:0 0 0 8px rgba(198,255,61,0)}
  100%{box-shadow:0 0 0 0 rgba(198,255,61,0)}
}

.header-cta{
  padding:9px 14px;
  font-size:.82rem;
  box-shadow:4px 4px 0 0 rgba(244,237,225,.22);
}
.header-cta:hover{box-shadow:6px 6px 0 0 rgba(244,237,225,.22)}

.nav-toggle{
  grid-area:toggle;
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  background:transparent;
  color:var(--warm-paper);
  border:var(--edge) solid var(--warm-paper);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.66rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  cursor:pointer;
  transition:background-color .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{background:var(--mid-navy);border-color:var(--pulse-orange)}
.nav-toggle-icon{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:var(--warm-paper);
  transition:background-color .2s var(--ease);
}
.nav-toggle-icon::before,
.nav-toggle-icon::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:var(--warm-paper);
  transition:transform .2s var(--ease);
}
.nav-toggle-icon::before{top:-5px}
.nav-toggle-icon::after{top:5px}
.nav-toggle[aria-expanded="true"]{border-color:var(--pulse-orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after{transform:translateY(-5px) rotate(-45deg)}

/* 08 页脚 ---------------------------------------------------------------- */
.site-footer{
  margin-top:clamp(56px,8vw,110px);
  background-color:var(--ink-navy);
  background-image:
    linear-gradient(90deg,rgba(255,106,26,.16),transparent 48%),
    linear-gradient(0deg,rgba(42,111,219,.20),transparent 62%);
  color:var(--warm-paper);
  border-top:var(--edge) solid var(--pulse-orange);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(24px,3.2vw,48px);
  padding-block:clamp(40px,5vw,72px);
}

.footer-mark{
  margin:0 0 12px;
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  font-weight:900;
  font-style:italic;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--warm-paper);
}
.footer-mark::before{
  content:"";
  display:block;
  width:34px;
  height:4px;
  margin-bottom:14px;
  background:var(--pulse-orange);
}
.footer-slogan{
  margin:0 0 10px;
  font-size:.95rem;
  color:var(--warm-paper);
}
.footer-note{
  margin:0;
  max-width:34ch;
  font-size:.82rem;
  line-height:1.7;
  color:var(--on-navy-dim);
}

.footer-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--on-navy-dim);
}
.footer-title::after{
  content:"";
  display:block;
  width:22px;
  height:2px;
  margin-top:9px;
  background:var(--pulse-orange);
}

.footer-links li{margin-bottom:9px}
.footer-links a{
  color:var(--warm-paper);
  font-size:.92rem;
  font-weight:600;
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-links a:hover{color:var(--pulse-orange);border-color:var(--pulse-orange)}

.footer-contact-lines li{
  margin-bottom:12px;
  font-size:.86rem;
  line-height:1.65;
  color:var(--warm-paper);
  word-break:break-word;
}
.footer-key{
  display:block;
  margin-bottom:3px;
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--on-navy-dim);
}

.footer-ticker{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  padding-block:18px;
  border-top:var(--edge) dashed var(--on-navy-line);
  border-bottom:var(--edge) solid var(--on-navy-line);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--on-navy-dim);
}
.footer-ticker-label{color:var(--data-lime)}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:22px clamp(22px,3vw,36px);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.06em;
  color:var(--on-navy-dim);
}
.footer-base p{margin:0}
.footer-legal{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px 16px}
.footer-legal a{
  color:var(--on-navy-dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.footer-legal a:hover{color:var(--pulse-orange);border-color:var(--pulse-orange)}
.footer-icp{color:var(--on-navy-dim)}

/* 09 滚动交互 ------------------------------------------------------------ */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:90;
  width:0;
  height:3px;
  background:linear-gradient(90deg,var(--pulse-orange),var(--data-lime));
  transition:width .12s linear;
  pointer-events:none;
}

.to-top{
  position:fixed;
  right:clamp(14px,2.4vw,30px);
  bottom:clamp(14px,2.4vw,30px);
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  background:var(--ink-navy);
  color:var(--warm-paper);
  border:var(--edge) solid var(--pulse-orange);
  border-radius:var(--radius);
  box-shadow:4px 4px 0 0 rgba(255,106,26,.35);
  font-family:var(--font-mono);
  font-size:.66rem;
  font-weight:700;
  letter-spacing:.12em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),
             visibility .22s linear,background-color .16s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--mid-navy)}
.to-top:focus-visible{outline:2px solid var(--data-lime);outline-offset:3px}
.to-top__arrow{color:var(--pulse-orange);font-size:.92rem;line-height:1}
.to-top__label{line-height:1}

[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal][data-revealed]{opacity:1;transform:none}

a[data-spy-current]{
  color:var(--pulse-orange);
  border-color:var(--pulse-orange);
}

/* 10 响应式 -------------------------------------------------------------- */
@media (max-width:1080px){
  .grid--3,
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--main-side,
  .grid--side-main{grid-template-columns:minmax(0,1fr)}

  .header-inner{
    grid-template-columns:minmax(0,1fr) auto auto;
    grid-template-areas:
      "brand actions toggle"
      "nav nav nav";
    gap:10px;
    min-height:0;
    padding-block:11px;
  }
  .brand-tag{display:none}
  .live-pill{display:none}
  .brand-mark{width:38px;height:33px;font-size:.7rem}
  .brand-name{font-size:1rem}

  .nav-toggle{display:inline-flex}

  .site-nav{
    grid-area:nav;
    justify-self:stretch;
    max-height:0;
    overflow:hidden;
    transition:max-height .3s var(--ease);
  }
  .site-nav[data-open]{max-height:280px}

  .nav-list{
    justify-content:flex-start;
    gap:6px;
    padding:2px 0 10px;
    overflow-x:auto;
    overscroll-behavior-x:contain;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
    scrollbar-color:var(--pulse-orange) transparent;
  }
  .nav-list::-webkit-scrollbar{height:3px}
  .nav-list::-webkit-scrollbar-track{background:transparent}
  .nav-list::-webkit-scrollbar-thumb{background:var(--pulse-orange)}

  .nav-link{background:var(--mid-navy);border-color:var(--mid-navy)}
  .nav-link:hover{background:var(--bright-blue);border-color:var(--bright-blue)}
  .nav-link[aria-current="page"]{
    background:var(--warm-paper);
    border-color:var(--pulse-orange);
    color:var(--ink-navy);
  }

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}

@media (max-width:640px){
  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:minmax(0,1fr)}

  .header-cta{padding:8px 12px;font-size:.78rem}
  .nav-toggle{padding:8px 10px;font-size:.62rem}
  .brand-mark{width:34px;height:30px;font-size:.64rem}
  .brand-name{font-size:.95rem}

  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-base{justify-content:flex-start}
  .to-top{padding:9px 12px;font-size:.62rem}
}

/* 11 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;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .live-dot{animation:none}
  .scroll-progress{transition:none}
  .media img{transition:none}
  .media:hover img{transform:none}
}