/* ============================================================
   宝威体育·中国看台 — 共享样式 /assets/site.css
   夜间看台数据台 · 堆叠面板 · 极细边界 · 牌色语义
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --stand-green:#0A352A;
  --night-blue:#061723;
  --pitch-green:#1E6B4E;
  --card-red:#E23A2E;
  --card-yellow:#F4C430;
  --light-white:#F5F1E8;
  --metal-silver:#B7C0C4;
  --screen-cyan:#4FD1C5;
  --line-graphite:#26363B;
  --deep-red:#6B1F1B;

  --font-display:"Barlow Condensed","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --step-1:12px;
  --step-2:14px;
  --step-3:16px;
  --step-4:20px;
  --step-5:28px;
  --step-6:44px;
  --step-7:72px;
  --step-8:112px;

  --shell:1440px;
  --gutter:48px;
  --radius:2px;
  --hair:1px solid rgba(183,192,196,.16);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:.18s;
}

/* ---------- 2. 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,li,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}

/* ---------- 3. 基础排版 ---------- */
body{
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(30,107,78,.35) 0%, rgba(6,23,35,0) 60%),
    var(--night-blue);
  color:var(--light-white);
  font-family:var(--font-body);
  font-size:var(--step-3);
  font-weight:400;
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.035em;
  line-height:1.08;
  color:var(--light-white);
}
h1{font-size:clamp(40px,7vw,88px);}
h2{font-size:clamp(28px,3.6vw,44px);}
h3{font-size:var(--step-5);}
h4{font-size:var(--step-4);letter-spacing:-.02em;}
p{max-width:70ch;}
strong{font-weight:700;color:var(--light-white);}
::selection{background:var(--card-yellow);color:#12180f;}

#main-content{display:block;scroll-margin-top:132px;}

/* 焦点可见性 */
:focus-visible{
  outline:2px solid var(--screen-cyan);
  outline-offset:3px;
  border-radius:var(--radius);
}
:focus:not(:focus-visible){outline:none;}

/* ---------- 4. 工具与通用容器 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.container--narrow{max-width:960px;}

.section{
  padding:72px 0;
  border-top:1px solid rgba(183,192,196,.12);
}
.section--flush{border-top:0;padding-top:24px;}

.stack{display:flex;flex-direction:column;gap:16px;}
.stack--lg{gap:32px;}

.divider{height:1px;background:rgba(183,192,196,.16);border:0;margin:32px 0;}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
}

/* ---------- 5. 刊头式头部 ---------- */
.skip-link{
  position:absolute;
  top:0;left:50%;
  transform:translate(-50%,-130%);
  z-index:300;
  padding:12px 22px;
  background:var(--light-white);
  color:var(--night-blue);
  font-weight:700;
  font-size:var(--step-2);
  letter-spacing:.02em;
  border-radius:0 0 var(--radius) var(--radius);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translate(-50%,0);}

.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:linear-gradient(180deg,rgba(6,23,35,.97) 0%,rgba(10,53,42,.94) 100%);
  border-bottom:1px solid var(--line-graphite);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,rgba(79,209,197,0) 0%,rgba(79,209,197,.55) 50%,rgba(244,196,48,.45) 78%,rgba(226,58,46,0) 100%);
  pointer-events:none;
}
.site-header.is-condensed{
  box-shadow:0 18px 34px -28px #000;
  background:linear-gradient(180deg,rgba(6,23,35,.99) 0%,rgba(10,53,42,.97) 100%);
}

.header-shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}

.masthead-bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
  padding:20px 0 14px;
  transition:padding var(--dur) var(--ease);
}

.masthead-meta{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:.08em;
  color:var(--metal-silver);
  text-transform:uppercase;
}
.meta-rule{
  flex:0 0 auto;
  width:26px;
  height:2px;
  background:linear-gradient(90deg,var(--card-yellow),rgba(244,196,48,0));
}
.utility-version{
  white-space:nowrap;
  color:var(--card-yellow);
  font-variant-numeric:tabular-nums;
}

.brand-lockup{
  display:inline-flex;
  align-items:center;
  gap:14px;
  justify-self:center;
  padding:4px;
  border-radius:var(--radius);
}
.brand-mark{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:44px;
  height:44px;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:15px;
  letter-spacing:-.03em;
  color:#0a1116;
  background:linear-gradient(150deg,var(--card-yellow) 0%,#F08A35 52%,var(--card-red) 100%);
  border-radius:var(--radius);
  box-shadow:inset 0 0 0 1px rgba(245,241,232,.22),0 8px 20px -14px #000;
  transition:width var(--dur) var(--ease),height var(--dur) var(--ease),font-size var(--dur) var(--ease);
}
.brand-text{display:flex;flex-direction:column;line-height:1.18;min-width:0;}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.025em;
  color:var(--light-white);
  white-space:nowrap;
  transition:font-size var(--dur) var(--ease);
}
.brand-descriptor{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--metal-silver);
  white-space:nowrap;
}

.header-actions{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  min-width:0;
}

/* 按钮体系 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:var(--step-2);
  font-weight:500;
  letter-spacing:.02em;
  line-height:1;
  text-align:center;
  transition:transform var(--dur) var(--ease),filter var(--dur) var(--ease),
             background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.btn--ticket{
  background:linear-gradient(135deg,var(--card-yellow) 0%,#F0902F 58%,var(--card-red) 100%);
  color:#140a06;
  font-weight:700;
  box-shadow:0 10px 24px -18px var(--card-red);
  white-space:nowrap;
}
.btn--ticket:hover{filter:brightness(1.08);transform:translateY(-1px);}
.btn--ticket:active{transform:translateY(0);filter:brightness(.98);}
.btn--ghost{
  background:transparent;
  border-color:rgba(183,192,196,.34);
  color:var(--light-white);
}
.btn--ghost:hover{border-color:var(--screen-cyan);color:var(--screen-cyan);}
.btn--solid{
  background:var(--pitch-green);
  border-color:rgba(79,209,197,.4);
  color:var(--light-white);
}
.btn--solid:hover{background:#248059;border-color:var(--screen-cyan);}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 12px;
  border:1px solid rgba(183,192,196,.28);
  border-radius:var(--radius);
  color:var(--light-white);
  font-size:13px;
  letter-spacing:.06em;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--screen-cyan);background:rgba(30,107,78,.28);}
.nav-toggle-bars{display:grid;gap:4px;width:18px;}
.nav-toggle-bars span{
  display:block;
  height:2px;
  width:100%;
  background:var(--screen-cyan);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-toggle-label{white-space:nowrap;}

/* 栏目导航 */
.primary-nav{
  border-top:1px solid rgba(183,192,196,.14);
}
.nav-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:4px 0 8px;
  transition:padding var(--dur) var(--ease);
}
.nav-item{display:flex;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 16px;
  border-radius:var(--radius);
  font-size:var(--step-2);
  font-weight:500;
  letter-spacing:.02em;
  color:var(--metal-silver);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:16px;right:16px;bottom:7px;
  height:2px;
  background:var(--card-yellow);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link:hover{color:var(--light-white);background:rgba(30,107,78,.34);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--light-white);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--card-red);}

.nav-panel-cta{display:none;}

/* 压缩态 */
.site-header.is-condensed .masthead-bar{padding:8px 0 4px;}
.site-header.is-condensed .brand-mark{width:34px;height:34px;font-size:12px;}
.site-header.is-condensed .brand-name{font-size:17px;}
.site-header.is-condensed .brand-descriptor{display:none;}
.site-header.is-condensed .nav-list{padding:0 0 4px;}
.site-header.is-condensed .nav-link{min-height:38px;font-size:13px;}
.site-header.is-condensed .nav-link::after{bottom:4px;}

/* ---------- 6. 看台页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:0;
  background:
    radial-gradient(110% 90% at 15% 0%,rgba(30,107,78,.42) 0%,rgba(6,23,35,0) 62%),
    linear-gradient(180deg,var(--night-blue) 0%,#07281f 58%,var(--stand-green) 100%);
  border-top:1px solid var(--line-graphite);
  color:var(--metal-silver);
}
.footer-strip{
  height:4px;
  background:linear-gradient(90deg,
    var(--pitch-green) 0% 26%,
    var(--screen-cyan) 26% 41%,
    var(--card-yellow) 41% 63%,
    var(--card-red) 63% 100%);
  opacity:.9;
}
.footer-shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:56px var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,7fr);
  gap:48px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(183,192,196,.16);
}
.footer-brand-line{
  font-family:var(--font-display);
  font-weight:900;
  font-size:26px;
  letter-spacing:-.025em;
  color:var(--light-white);
  line-height:1.1;
}
.footer-summary{
  margin-top:14px;
  max-width:38ch;
  font-size:var(--step-2);
  line-height:1.8;
  color:var(--metal-silver);
}
.footer-note{
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:.06em;
  color:var(--card-yellow);
}
.footer-columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.footer-col{min-width:0;}
.footer-col-title{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  font-weight:500;
  letter-spacing:.16em;
  color:var(--screen-cyan);
  padding-bottom:8px;
  border-bottom:1px solid rgba(79,209,197,.24);
}
.footer-links{display:grid;gap:2px;}
.footer-link{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:var(--step-2);
  color:var(--metal-silver);
  transition:color var(--dur) var(--ease);
}
.footer-link::before{
  content:"";
  width:0;
  height:1px;
  margin-right:0;
  background:var(--card-yellow);
  transition:width var(--dur) var(--ease),margin var(--dur) var(--ease);
}
.footer-link:hover{color:var(--light-white);}
.footer-link:hover::before{width:14px;margin-right:8px;}

.footer-contact{
  display:grid;
  grid-template-columns:minmax(0,3fr) minmax(0,9fr);
  gap:24px 32px;
  align-items:start;
  margin-top:32px;
  padding:24px;
  background:rgba(30,107,78,.18);
  border:1px solid rgba(183,192,196,.18);
  border-radius:var(--radius);
  box-shadow:inset 0 1px 0 rgba(245,241,232,.06);
}
.footer-contact-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:var(--step-3);
  letter-spacing:.02em;
  color:var(--light-white);
  line-height:1.3;
}
.contact-list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.contact-item{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding-left:12px;
  border-left:1px solid rgba(183,192,196,.22);
  min-width:0;
}
.contact-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--screen-cyan);
}
.contact-value{
  font-size:var(--step-2);
  line-height:1.6;
  color:var(--light-white);
  word-break:break-word;
}
.contact-value--mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.01em;
  font-variant-numeric:tabular-nums;
  word-break:break-all;
}
.footer-service-note{
  grid-column:1 / -1;
  margin-top:4px;
  padding-top:14px;
  border-top:1px dashed rgba(183,192,196,.2);
  font-size:13px;
  line-height:1.75;
  color:var(--metal-silver);
  max-width:none;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:24px;
  padding-top:20px;
  border-top:1px solid rgba(183,192,196,.14);
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:.04em;
  color:rgba(183,192,196,.82);
}
.footer-copy{margin:0;max-width:none;}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:4px 22px;}
.footer-legal-link{
  display:inline-flex;
  align-items:center;
  min-height:36px;
  color:var(--metal-silver);
  transition:color var(--dur) var(--ease);
}
.footer-legal-link:hover{color:var(--screen-cyan);}

/* ---------- 7. 通用排版组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:.18em;
  color:var(--screen-cyan);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:24px;
  height:2px;
  background:var(--card-yellow);
}
.headline{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1.02;
  font-size:clamp(40px,7vw,88px);
  color:var(--light-white);
}
.headline--tight{font-size:clamp(32px,4.4vw,56px);}
.display-thin{
  font-family:var(--font-display);
  font-weight:300;
  letter-spacing:-.03em;
  line-height:1;
  font-size:clamp(36px,6vw,72px);
  color:var(--light-white);
}
.lede{
  font-size:var(--step-4);
  line-height:1.75;
  color:var(--metal-silver);
  max-width:56ch;
}
.prose{
  max-width:66ch;
  color:var(--metal-silver);
  font-size:var(--step-3);
  line-height:1.8;
}
.prose p + p{margin-top:1em;}
.prose h2,.prose h3{color:var(--light-white);margin:1.6em 0 .5em;}

/* ---------- 8. 网格 ---------- */
.grid{display:grid;gap:24px;}
.grid--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
.grid--4-8{grid-template-columns:minmax(0,4fr) minmax(0,8fr);}
.grid--3-9{grid-template-columns:minmax(0,3fr) minmax(0,9fr);}

/* ---------- 9. 面板 / 卡片 ---------- */
.panel{
  background:linear-gradient(160deg,rgba(10,53,42,.86) 0%,rgba(6,23,35,.9) 100%);
  border:1px solid var(--line-graphite);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:0 20px 44px -36px #000;
}
.panel--light{background:rgba(30,107,78,.16);}
.panel--red{
  border-color:rgba(226,58,46,.48);
  background:linear-gradient(160deg,rgba(107,31,27,.55) 0%,rgba(6,23,35,.92) 100%);
}
.card{
  background:rgba(6,23,35,.72);
  border:1px solid var(--line-graphite);
  border-radius:var(--radius);
  padding:22px;
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.card:hover{border-color:rgba(79,209,197,.44);transform:translateY(-2px);}
.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:20px;
}

/* ---------- 10. 筛选 chips / 标签 ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:36px;
  padding:0 14px;
  border:1px solid var(--line-graphite);
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  color:var(--metal-silver);
  background:rgba(6,23,35,.5);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.chip:hover{border-color:var(--screen-cyan);color:var(--light-white);}
.chip[aria-pressed="true"],.chip.is-active{
  background:var(--card-yellow);
  border-color:var(--card-yellow);
  color:#12180f;
  font-weight:700;
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:3px 8px;
  border:1px solid currentColor;
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.5;
}
.tag--red{color:var(--card-red);background:rgba(107,31,27,.32);}
.tag--yellow{color:var(--card-yellow);background:rgba(244,196,48,.1);}
.tag--cyan{color:var(--screen-cyan);background:rgba(79,209,197,.1);}

/* ---------- 11. 数据与时间线 ---------- */
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
.score{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(28px,4vw,44px);
  letter-spacing:-.02em;
  line-height:1;
  color:var(--light-white);
  font-variant-numeric:tabular-nums;
}
.timeline{display:grid;gap:0;}
.timeline-item{
  position:relative;
  padding:0 0 24px 22px;
  border-left:1px solid var(--line-graphite);
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-4px;top:8px;
  width:7px;height:7px;
  background:var(--card-yellow);
  border-radius:50%;
  box-shadow:0 0 0 3px rgba(244,196,48,.16);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:20px 0;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:.06em;
  color:var(--metal-silver);
}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"/";color:var(--line-graphite);}
.breadcrumb a{color:var(--metal-silver);transition:color var(--dur) var(--ease);}
.breadcrumb a:hover{color:var(--screen-cyan);}
.breadcrumb [aria-current="page"]{color:var(--light-white);}

/* ---------- 13. 响应式图片容器基础 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line-graphite);
  border-radius:var(--radius);
  background:
    repeating-linear-gradient(115deg,rgba(79,209,197,.1) 0 2px,rgba(79,209,197,0) 2px 14px),
    linear-gradient(150deg,var(--pitch-green) 0%,var(--night-blue) 78%);
  box-shadow:inset 0 0 60px -30px #000;
}
.media-frame > img,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--tilt{clip-path:polygon(0 0,100% 3.5%,100% 100%,0 96.5%);}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:14px 16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--light-white);
  background:linear-gradient(to top,rgba(6,23,35,.94),rgba(6,23,35,0));
}

/* ---------- 14. 滚动显现协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .52s var(--ease),transform .52s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none;}
[data-reveal-stagger] > *{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal-stagger].is-visible > *{opacity:1;transform:none;}
[data-reveal-stagger].is-visible > *:nth-child(2){transition-delay:.06s;}
[data-reveal-stagger].is-visible > *:nth-child(3){transition-delay:.12s;}
[data-reveal-stagger].is-visible > *:nth-child(4){transition-delay:.18s;}
[data-reveal-stagger].is-visible > *:nth-child(5){transition-delay:.24s;}
[data-reveal-stagger].is-visible > *:nth-child(6){transition-delay:.3s;}
[data-reveal-stagger].is-visible > *:nth-child(7){transition-delay:.36s;}
[data-reveal-stagger].is-visible > *:nth-child(8){transition-delay:.42s;}

/* ---------- 15. 平板与移动端 ---------- */
@media (max-width:1120px){
  :root{--gutter:32px;}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:32px;}
  .footer-summary{max-width:60ch;}
}

@media (max-width:960px){
  :root{--gutter:20px;}
  #main-content{scroll-margin-top:96px;}

  .masthead-bar{
    grid-template-columns:minmax(0,1fr) auto;
    gap:12px;
    padding:12px 0 10px;
  }
  .masthead-meta{display:none;}
  .brand-lockup{justify-self:start;gap:10px;}
  .brand-mark{width:36px;height:36px;font-size:12px;}
  .brand-name{font-size:18px;}
  .brand-descriptor{font-size:10px;letter-spacing:.12em;}

  .nav-toggle{display:inline-flex;}

  .primary-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    padding:8px var(--gutter) 20px;
    background:linear-gradient(180deg,rgba(6,23,35,.995) 0%,rgba(10,53,42,.995) 100%);
    border-top:1px solid var(--line-graphite);
    box-shadow:0 30px 50px -30px #000;
    max-height:calc(100vh - 68px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .primary-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:0;
  }
  .nav-item{display:block;}
  .nav-link{
    justify-content:flex-start;
    width:100%;
    min-height:52px;
    padding:0 4px;
    border-bottom:1px solid rgba(183,192,196,.12);
    border-radius:0;
    font-size:var(--step-3);
    color:var(--light-white);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--card-yellow);font-weight:700;}
  .site-header.is-condensed .nav-link{min-height:48px;font-size:var(--step-3);}
  .site-header.is-condensed .nav-list{padding:0;}
  .site-header.is-condensed .brand-descriptor{display:none;}

  .nav-panel-cta{
    display:inline-flex;
    width:100%;
    margin-top:16px;
  }

  .section{padding:56px 0;}
  .grid--5-7,.grid--4-8,.grid--3-9{grid-template-columns:minmax(0,1fr);}
  .grid{gap:20px;}
  .panel{padding:22px;}

  .footer-shell{padding:40px var(--gutter) 24px;}
  .footer-columns{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:20px;}
  .footer-contact{grid-template-columns:minmax(0,1fr);padding:20px;}
  .contact-list{grid-template-columns:minmax(0,1fr);gap:14px;}
  .contact-item{border-left:0;border-top:1px solid rgba(183,192,196,.18);padding:10px 0 0;}
  .footer-legal{font-size:11px;}
}

@media (max-width:760px){
  .header-actions .btn--ticket{display:none;}
  h1,h2,h3,h4{letter-spacing:-.03em;}
  .footer-legal{flex-direction:column;align-items:flex-start;}
  .footer-legal-links{gap:0 18px;}
}

@media (max-width:420px){
  .brand-name{font-size:16px;}
  .brand-descriptor{display:none;}
  .nav-toggle-label{display:none;}
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  [data-reveal],
  [data-reveal-stagger] > *{
    opacity:1 !important;
    transform:none !important;
  }
  .btn:hover,.card:hover{transform:none;}
}