/* ==========================================================================
   中欧赛事 CN — 共享样式 /assets/site.css
   深墨蓝档案底 + 炽焰橙状态 + 青瓷绿数据；堆叠面板、大圆角、等宽数据
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box}

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

body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line-soft);margin:0}

/* ---------- 2. Tokens ---------- */
:root{
  --ink-900:#0A1A2A;
  --ink-800:#0E2438;
  --ink-700:#12304A;
  --line:#1E4A6E;
  --line-soft:rgba(30,74,110,.55);
  --line-faint:rgba(30,74,110,.32);

  --flame-500:#FF6A1F;
  --flame-300:#FFA167;
  --jade-500:#2FD2A8;
  --jade-700:#15876A;
  --amber:#FFC94A;

  --mist:#F4F7FA;
  --mist-line:#D8E2EC;
  --graphite:#7C8B9B;
  --ink-text:#16202B;

  --text-on-dark:#EAF1F8;
  --text-dim:#9FB3C6;

  --radius-xl:28px;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --radius-pill:999px;

  --shell:1320px;
  --header-h:84px;
  --header-h-compact:64px;

  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:220ms;

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

/* ---------- 3. Base & 中文排版 ---------- */
body{
  background:var(--ink-900);
  color:var(--text-on-dark);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-weight:900;
  line-height:1.18;
  letter-spacing:-.01em;
  color:#fff;
  word-break:break-word;
}

h1{font-size:clamp(40px,6vw,96px);letter-spacing:-.02em}
h2{font-size:clamp(28px,3.4vw,52px)}
h3{font-size:clamp(20px,2vw,28px)}
h4{font-size:17px;letter-spacing:.01em}

p{word-break:break-word;overflow-wrap:anywhere}

a{transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease)}

:focus-visible{
  outline:2px solid var(--jade-500);
  outline-offset:3px;
  border-radius:6px;
}

.mono,.data-num,.stat__value,.footer-value--mono,.season-chip,.nav-index,.label,.eyebrow,.footer-key,.section-num{font-family:var(--font-mono)}

.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:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--flame-500);color:#08131F;font-size:13.5px;font-weight:700;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 4. 布局容器与栅格 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,48px);
}

.site-main{padding-top:var(--header-h)}
.site-main--flush{padding-top:0}

.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,32px);
}
.grid--2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(16px,2.2vw,32px)}
.grid--3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.2vw,32px)}
.grid--4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(14px,1.8vw,26px)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

.stack > * + *{margin-top:clamp(16px,2vw,26px)}
.stack--tight > * + *{margin-top:10px}

/* ---------- 5. 章节与面板（堆叠画板） ---------- */
.section{
  position:relative;
  padding-block:clamp(48px,7vw,104px);
  border-top:1px solid var(--line-soft);
}
.section--flush{border-top:0}
.section--panel{background:linear-gradient(168deg,var(--ink-800),var(--ink-700))}
.section--deep{background:var(--ink-900)}
.section--light{background:var(--mist);color:var(--ink-text);border-top-color:var(--mist-line)}
.section--light h1,.section--light h2,.section--light h3,.section--light h4{color:var(--ink-text)}
.section--light .section-lede,.section--light .eyebrow{color:#41556B}

.panel{
  position:relative;
  background:linear-gradient(158deg,var(--ink-700),var(--ink-800));
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  padding:clamp(20px,3vw,40px);
}
.panel--light{
  background:var(--mist);
  color:var(--ink-text);
  border-color:var(--mist-line);
}
.panel--light h2,.panel--light h3{color:var(--ink-text)}
.panel--stack{box-shadow:0 24px 60px -40px rgba(0,0,0,.9)}
.panel--outline{background:transparent;border-style:dashed}

.section-num{
  display:block;
  font-weight:200;
  font-size:clamp(72px,10vw,160px);
  line-height:.82;
  letter-spacing:-.05em;
  color:rgba(30,74,110,.55);
  user-select:none;
}
.section--light .section-num{color:rgba(30,74,110,.18)}

.eyebrow{
  display:inline-block;
  font-size:12.5px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--flame-300);
  text-transform:uppercase;
}
.label{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 13px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(18,48,74,.5);
  font-size:12px;letter-spacing:.08em;
  color:var(--text-dim);
}
.label--jade{border-color:rgba(47,210,168,.5);color:var(--jade-500)}
.label--flame{border-color:rgba(255,106,31,.55);color:var(--flame-300)}

.section-title{font-size:clamp(28px,3.6vw,54px);letter-spacing:-.015em}
.section-lede{
  margin-top:14px;
  max-width:44rem;
  font-size:clamp(15px,1.15vw,17.5px);
  line-height:1.9;
  color:var(--text-dim);
}

.divider{height:1px;background:var(--line-soft);border:0;margin-block:clamp(20px,3vw,36px)}

/* ---------- 6. 正文长文 ---------- */
.prose{max-width:44rem;font-size:16.5px;line-height:1.9}
.prose > * + *{margin-top:1.1em}
.prose h2{font-size:clamp(22px,2.2vw,30px);margin-top:1.8em}
.prose h3{font-size:clamp(18px,1.6vw,22px);margin-top:1.5em}
.prose ul{list-style:none;padding-left:0}
.prose ul li{position:relative;padding-left:20px}
.prose ul li + li{margin-top:.55em}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.78em;
  width:8px;height:2px;background:var(--flame-500);border-radius:2px;
}
.prose a{color:var(--jade-700);border-bottom:1px solid rgba(21,135,106,.4)}
.prose a:hover{color:var(--flame-500);border-bottom-color:var(--flame-500)}
.section--light .prose{color:var(--ink-text)}
.section--light .prose a{color:var(--jade-700)}

.link-inline{
  color:var(--flame-300);
  border-bottom:1px solid rgba(255,161,103,.45);
}
.link-inline:hover{color:#fff;border-bottom-color:var(--flame-500)}

/* ---------- 7. 按钮与胶囊 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:600;letter-spacing:.02em;
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{background:var(--flame-500);color:#08131F;border-color:var(--flame-500)}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--flame-300);border-color:var(--flame-300)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:transparent;color:var(--text-on-dark);border-color:var(--line)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--flame-300);color:var(--flame-300)}
.btn--jade{background:transparent;color:var(--jade-500);border-color:rgba(47,210,168,.5)}
.btn--jade:hover,.btn--jade:focus-visible{background:rgba(47,210,168,.12);color:#fff;border-color:var(--jade-500)}
.btn--sm{padding:10px 18px;font-size:13px}
.btn--block{width:100%}
.section--light .btn--ghost{color:var(--ink-text);border-color:var(--mist-line)}
.section--light .btn--ghost:hover{color:var(--flame-500);border-color:var(--flame-500)}

.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(18,48,74,.45);
  font-family:var(--font-mono);
  font-size:12.5px;letter-spacing:.06em;
  color:var(--text-dim);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--flame-300);color:#fff}
.chip.is-active,.chip[aria-pressed="true"]{
  border-color:var(--flame-500);
  color:#fff;
  background:rgba(255,106,31,.12);
}
.chip.is-active::before,.chip[aria-pressed="true"]::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--jade-500);
}
.chip-group{display:flex;flex-wrap:wrap;gap:8px;align-items:center}

/* ---------- 8. 数据组件 ---------- */
.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{
  font-size:clamp(28px,4vw,56px);
  font-weight:500;
  line-height:1;
  letter-spacing:.01em;
  color:#fff;
}
.stat__value--jade{color:var(--jade-500)}
.stat__value--flame{color:var(--flame-500)}
.stat__label{font-size:12.5px;letter-spacing:.1em;color:var(--graphite)}
.section--light .stat__value{color:var(--ink-text)}
.section--light .stat__value--jade{color:var(--jade-700)}
.section--light .stat__value--flame{color:var(--flame-500)}

.data-row{
  display:grid;
  grid-template-columns:minmax(72px,1fr) minmax(80px,2.2fr) auto;
  gap:12px;align-items:center;
}
.data-row__label{font-size:13.5px;color:var(--text-dim)}
.data-row__value{font-family:var(--font-mono);font-size:13.5px;letter-spacing:.02em;color:var(--jade-500)}
.section--light .data-row__label{color:#41556B}
.section--light .data-row__value{color:var(--jade-700)}

.data-bar{
  position:relative;
  height:8px;
  border-radius:var(--radius-pill);
  background:rgba(30,74,110,.65);
  overflow:hidden;
}
.section--light .data-bar{background:rgba(22,32,43,.12)}
.data-bar__fill{
  display:block;height:100%;
  width:calc(var(--value,0) * 1%);
  border-radius:inherit;
  background:linear-gradient(90deg,var(--jade-700),var(--jade-500));
  transition:width 320ms var(--ease);
}
.data-bar__fill--flame{background:linear-gradient(90deg,#E24E06,var(--flame-500))}
.data-bar__fill--amber{background:linear-gradient(90deg,#C79212,var(--amber))}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
  background:rgba(47,210,168,.14);color:var(--jade-500);
}
.badge--flame{background:rgba(255,106,31,.16);color:var(--flame-300)}
.badge--amber{background:rgba(255,201,74,.16);color:var(--amber)}

.sync-dot{
  display:inline-block;
  width:7px;height:7px;border-radius:50%;
  background:var(--jade-500);
  box-shadow:0 0 0 3px rgba(47,210,168,.16);
  flex:none;
}

/* ---------- 9. 图片容器（页面阶段放置素材） ---------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  background:linear-gradient(150deg,var(--ink-700),var(--ink-900));
  aspect-ratio:16 / 9;
}
.media > img,.media > svg,.media > picture > img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.94) contrast(1.04);
}
.media--wide{aspect-ratio:21 / 9}
.media--tall{aspect-ratio:4 / 5}
.media--square{aspect-ratio:1 / 1}
.media--rounded{border-radius:var(--radius-lg)}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:18px 20px 16px;
  background:linear-gradient(180deg,rgba(10,26,42,0),rgba(10,26,42,.92));
  font-size:13px;line-height:1.6;color:var(--text-on-dark);
}
.media__badge{position:absolute;top:16px;left:16px}
.media__badge--right{left:auto;right:16px}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs{margin-block:0 18px;font-size:12.5px}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--graphite)}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--line);font-family:var(--font-mono)}
.breadcrumbs a:hover{color:var(--flame-300)}
.breadcrumbs [aria-current="page"]{color:var(--text-dim)}

/* ---------- 11. 页头 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-condensed{
  background:rgba(10,26,42,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  overflow:hidden;opacity:0;
  transition:opacity var(--dur) var(--ease);
}
.scroll-progress.is-active{opacity:1}
.scroll-progress__bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--flame-500),var(--flame-300) 48%,var(--jade-500));
}

.header-shell{
  position:relative;
  z-index:70;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,48px);
  height:var(--header-h);
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(14px,2vw,32px);
  transition:height var(--dur) var(--ease);
}
.site-header.is-condensed .header-shell{height:var(--header-h-compact)}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:42px;height:42px;flex:none;
  display:grid;place-items:center;
  border-radius:14px;
  background:linear-gradient(140deg,var(--flame-500),#C24A0C);
  color:#0A1A2A;
  transition:transform var(--dur) var(--ease);
}
.brand:hover .brand-mark{transform:translateY(-1px)}
.brand-mark__glyph{width:30px;height:30px}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{font-size:16.5px;font-weight:900;letter-spacing:.03em;color:#fff}
.brand-tagline{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.2em;
  color:var(--jade-500);
}

/* 主导航 */
.site-nav{min-width:0}
.nav-list{
  display:flex;align-items:center;justify-content:center;
  gap:clamp(4px,1vw,16px);
}
.nav-item{flex:none}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 3px;
  font-size:13.5px;letter-spacing:.05em;
  color:var(--text-dim);
  white-space:nowrap;
}
.nav-index{display:none;font-size:10px;letter-spacing:.08em;color:var(--flame-300);opacity:.85}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;
  border-radius:2px;background:var(--flame-500);
  transform:scaleX(0);transform-origin:left center;
  transition:transform 240ms var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:#fff}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(.55)}
.nav-link[aria-current="page"]{color:#fff}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* 右侧工具区 */
.header-aside{
  display:flex;align-items:center;gap:clamp(8px,1.1vw,16px);
  justify-self:end;
}
.sync-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 13px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius-pill);
  background:rgba(18,48,74,.5);
  font-size:11.5px;letter-spacing:.04em;color:var(--text-dim);
  white-space:nowrap;
}
.season-switch{
  display:inline-flex;align-items:center;gap:4px;
  padding:4px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius-pill);
  background:rgba(10,26,42,.55);
}
.season-switch__label{
  padding-left:8px;
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.18em;color:var(--graphite);
}
.season-chip{
  display:inline-flex;align-items:center;
  padding:5px 11px;
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.02em;
  color:var(--text-dim);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
a.season-chip:hover,a.season-chip:focus-visible{background:rgba(30,74,110,.8);color:#fff}
.season-chip.is-current{background:var(--flame-500);color:#0A1A2A;font-weight:600}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  width:44px;height:44px;flex:none;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--line-soft);
  border-radius:14px;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--flame-300);background:rgba(18,48,74,.6)}
.nav-toggle__bar{
  display:block;width:18px;height:2px;border-radius:2px;
  background:var(--text-on-dark);
  transition:transform var(--dur) var(--ease),opacity 160ms var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

body.is-nav-open{overflow:hidden}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  background:linear-gradient(180deg,var(--ink-900) 0%,#071322 100%);
  border-top:1px solid var(--line);
  color:var(--text-dim);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;top:-160px;right:-120px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,31,.14),rgba(255,106,31,0) 68%);
  pointer-events:none;
}
.footer-shell{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,6vw,88px) clamp(18px,4vw,48px) clamp(22px,3vw,36px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1.05fr) minmax(0,2fr) minmax(220px,1.05fr);
  gap:clamp(24px,3vw,56px);
  align-items:start;
}
.footer-brand{position:relative}
.footer-watermark{
  display:block;
  font-family:var(--font-mono);
  font-weight:200;
  font-size:clamp(64px,7vw,110px);
  line-height:.8;
  letter-spacing:-.06em;
  color:rgba(30,74,110,.55);
  user-select:none;
}
.footer-brand-name{
  margin-top:10px;
  font-size:19px;font-weight:900;letter-spacing:.04em;color:#fff;
}
.footer-tagline{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.2em;color:var(--flame-300);
}
.footer-desc{
  margin-top:16px;
  max-width:24rem;
  font-size:14px;line-height:1.85;color:var(--text-dim);
}
.footer-cta{margin-top:22px}

.footer-columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.4vw,40px);
}
.footer-col-title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11.5px;font-weight:500;letter-spacing:.18em;
  color:var(--text-on-dark);
}
.footer-list li + li{margin-top:10px}
.footer-list a{
  display:inline-block;
  font-size:14px;
  color:var(--text-dim);
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--flame-300);transform:translateX(3px)}

.footer-list--contact li{display:grid;gap:3px}
.footer-list--contact li + li{margin-top:16px}
.footer-key{
  font-size:10.5px;letter-spacing:.16em;
  color:var(--graphite);
}
.footer-value{font-size:14px;line-height:1.7;color:var(--text-on-dark)}
.footer-value--mono{font-family:var(--font-mono);font-size:13.5px;letter-spacing:.02em}

.footer-bottom{
  margin-top:clamp(32px,4vw,64px);
  padding-top:22px;
  border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:14px 28px;
  align-items:center;justify-content:space-between;
}
.footer-note{
  display:flex;align-items:center;gap:10px;
  font-size:12.5px;color:var(--text-dim);
}
.footer-legal{
  display:flex;flex-wrap:wrap;gap:8px 20px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.02em;color:var(--graphite);
}

/* ---------- 13. 显现与动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

@media (scripting: none){
  [data-reveal]{opacity:1;transform:none}
}

/* ---------- 14. 响应式 ---------- */
@media (min-width:1200px){
  .nav-index{display:inline-block}
}

@media (max-width:1240px){
  .season-switch{display:none}
}

@media (max-width:1100px){
  :root{--header-h:72px;--header-h-compact:60px}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:60;
    padding:calc(var(--header-h) + 24px) clamp(20px,6vw,44px) 44px;
    background:linear-gradient(168deg,rgba(10,26,42,.985),rgba(18,48,74,.985));
    border-bottom:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity 240ms var(--ease),transform 320ms var(--ease),visibility 240ms linear;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    pointer-events:auto;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    border-top:1px solid var(--line-soft);
  }
  .nav-item{border-bottom:1px solid var(--line-soft)}
  .nav-link{
    display:flex;
    align-items:center;
    gap:14px;
    padding:18px 6px;
    font-size:19px;
    letter-spacing:.03em;
    color:var(--text-on-dark);
  }
  .nav-index{display:inline-block;font-size:11px;letter-spacing:.1em}
  .nav-link::after{left:0;right:auto;width:42px;bottom:0}
  .nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
  .nav-link[aria-current="page"]::after{transform:scaleX(1)}
  .nav-link[aria-current="page"] .nav-index{color:var(--flame-500)}

  .header-shell{grid-template-columns:auto 1fr auto}
  .site-nav{grid-column:1 / -1}
}

@media (max-width:1080px){
  .sync-pill__text{display:none}
  .sync-pill{padding:8px}
}

@media (max-width:900px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}

  .footer-top{grid-template-columns:1fr;}
  .footer-columns{grid-template-columns:repeat(3,minmax(0,1fr));order:2}
  .footer-contact{order:3}
  .footer-brand{order:1}
  .footer-watermark{font-size:clamp(56px,16vw,88px)}
}

@media (max-width:640px){
  body{font-size:15.5px}
  .grid,.grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .header-cta{padding:9px 14px;font-size:12.5px}
  .panel{border-radius:var(--radius-lg)}
  .media{border-radius:var(--radius-lg)}
}

@media (max-width:460px){
  .brand-tagline{display:none}
  .brand-mark{width:38px;height:38px}
  .brand-name{font-size:15px}
  .footer-columns{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 15. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .site-nav,.nav-toggle__bar,.brand-mark{transition:none}
  .site-header{transition:background-color 200ms linear,border-color 200ms linear}
  .nav-link::after{transition:none}
  .footer-list a{transition:color 200ms linear}
  .data-bar__fill{transition:none}
}