/* =========================================================
   雷竞技赛场 · /assets/site.css
   共享外壳：深夜转播台 · 画册式赛事数据导航
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
main{display:block}
table{border-collapse:collapse}
::selection{background:rgba(88,245,176,.28);color:#fff}

/* ---------- 2. 变量 ---------- */
:root{
  --ink-900:#060A18;
  --ink-800:#0E1530;
  --ink-700:#1B2350;
  --blue:#2F6BFF;
  --green:#58F5B0;
  --violet:#7A5CFF;
  --orange:#FF7A2F;
  --paper:#F4F1E8;
  --stone:#B9B4A6;
  --text:#E9EDF5;
  --muted:#A7B0C7;

  --line:rgba(27,35,80,.9);
  --line-soft:rgba(27,35,80,.6);
  --line-blue:rgba(47,107,255,.42);

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

  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --radius-pill:999px;
  --radius-l:18px;

  --glow-blue:0 0 24px -6px rgba(47,107,255,.85);
  --glow-green:0 0 22px -6px rgba(88,245,176,.9);
  --shadow-card:0 30px 60px -40px #000;
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(27,35,80,.42) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,35,80,.42) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(60% 42% at 86% 6%,rgba(47,107,255,.18),transparent 70%),
    radial-gradient(46% 38% at 6% 92%,rgba(122,92,255,.16),transparent 72%);
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.12;
  color:var(--text);
}
h1{font-size:clamp(34px,6vw,76px)}
h2{font-size:clamp(26px,3.8vw,46px)}
h3{font-size:clamp(19px,2.2vw,26px);letter-spacing:0}
p{max-width:68ch}

strong{color:#fff;font-weight:700}
code,kbd,samp{font-family:var(--font-mono)}

:focus-visible{
  outline:2px solid var(--green);
  outline-offset:3px;
  border-radius:6px;
}
#main-content:focus-visible{outline:2px solid var(--green);outline-offset:6px}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:400;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  background:var(--green);
  color:#04140d;
  font-size:14px;
  font-weight:700;
  transform:translateY(-200%);
  transition:transform .2s ease;
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 5. 页头 ---------- */
.site-header{
  position:relative;
  z-index:120;
  background:linear-gradient(180deg,rgba(6,10,24,.97),rgba(6,10,24,.82));
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,107,255,.75),rgba(88,245,176,.6),transparent);
  opacity:.7;
}

.scroll-progress{
  position:fixed;
  top:0;left:0;
  width:100%;
  height:2px;
  z-index:200;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue),var(--green));
  box-shadow:0 0 14px rgba(88,245,176,.7);
  pointer-events:none;
}

.header-inner{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:start;
  gap:clamp(16px,3vw,48px);
  width:100%;
  max-width:1440px;
  margin:0 auto;
  padding:18px clamp(16px,3vw,40px) 22px;
}

/* 品牌 */
.brand-block{grid-column:1;display:flex;align-items:flex-start;min-width:0}
.brand-lockup{display:inline-flex;flex-direction:column;gap:7px;min-width:0}
.brand-mark{
  position:relative;
  padding-left:15px;
  font-family:var(--font-display);
  font-size:clamp(20px,2.1vw,26px);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--text);
  transition:color .18s ease;
}
.brand-mark::before{
  content:"";
  position:absolute;
  left:0;top:1px;bottom:1px;
  width:4px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--green),var(--blue));
  box-shadow:var(--glow-green);
}
.brand-sub{
  padding-left:15px;
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  color:var(--muted);
  transition:color .18s ease;
}
.brand-lockup:hover .brand-mark{color:#fff}
.brand-lockup:hover .brand-sub{color:var(--green)}

/* 中段：纵排注释 + 工具区 */
.header-middle{
  grid-column:2;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:clamp(12px,2vw,28px);
  min-width:0;
}
.header-note{display:flex;align-items:flex-start;gap:10px;padding-top:2px}
.header-note-line{
  display:block;
  width:1px;
  height:34px;
  background:linear-gradient(180deg,transparent,rgba(185,180,166,.85),transparent);
}
.header-note-text{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  max-height:74px;
  overflow:hidden;
  font-size:11px;
  font-weight:500;
  letter-spacing:.34em;
  color:var(--stone);
}

.header-utility{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  flex-wrap:wrap;
  gap:10px;
}

.status-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 13px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(88,245,176,.3);
  background:rgba(88,245,176,.07);
  color:var(--muted);
  font-size:12px;
  letter-spacing:.06em;
  white-space:nowrap;
  transition:border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.status-chip:hover{
  color:var(--green);
  border-color:rgba(88,245,176,.7);
  box-shadow:var(--glow-green);
}
.status-dot{
  flex:none;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(88,245,176,.16),0 0 12px var(--green);
  animation:pulse 2.4s ease-in-out infinite;
}
.status-text{line-height:1.4}

@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.5;transform:scale(.8)}
}

.cta-capsule{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 18px;
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,var(--orange),#FF5A14);
  color:#180700;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  box-shadow:0 0 0 1px rgba(255,122,47,.45),0 14px 28px -18px rgba(255,122,47,.95);
  transition:transform .18s ease,box-shadow .18s ease;
}
.cta-capsule:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(255,255,255,.4),0 18px 34px -16px rgba(255,122,47,1),0 0 26px -6px rgba(255,122,47,.85);
}

/* 分置导航 */
.split-nav{grid-column:3;justify-self:end;min-width:0}
.nav-list{
  display:grid;
  grid-template-columns:repeat(3,max-content);
  justify-content:end;
  align-items:start;
  gap:9px 11px;
}
.nav-item{transform:translateY(0)}
.nav-item:nth-child(1){transform:translateY(9px)}
.nav-item:nth-child(2){transform:translateY(1px)}
.nav-item:nth-child(3){transform:translateY(11px)}
.nav-item:nth-child(4){transform:translateY(3px)}
.nav-item:nth-child(5){transform:translateY(8px)}
.nav-item:nth-child(6){transform:translateY(0)}

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 15px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(27,35,80,.95);
  background:rgba(14,21,48,.78);
  color:var(--text);
  font-size:14px;
  line-height:1.3;
  letter-spacing:.01em;
  white-space:nowrap;
  transition:border-color .18s ease,background .18s ease,box-shadow .18s ease,transform .18s ease,color .18s ease;
}
.nav-item:nth-child(2n) .nav-link{padding:7px 13px;font-size:13.5px}
.nav-link::after{
  content:"›";
  font-size:12px;
  line-height:1;
  color:var(--green);
  opacity:0;
  transform:translateX(-5px);
  transition:opacity .18s ease,transform .18s ease;
}
.nav-link:hover,
.nav-link:focus-visible{
  border-color:rgba(47,107,255,.85);
  background:rgba(47,107,255,.16);
  color:#fff;
  transform:translateX(-4px);
  box-shadow:0 0 0 1px rgba(47,107,255,.35),var(--glow-blue);
}
.nav-link:hover::after,
.nav-link:focus-visible::after{opacity:1;transform:none}
.nav-link[aria-current="page"]{
  border-color:rgba(88,245,176,.75);
  background:linear-gradient(120deg,rgba(47,107,255,.28),rgba(88,245,176,.16));
  color:#fff;
  box-shadow:0 0 0 1px rgba(88,245,176,.35),var(--glow-green);
}
.nav-link[aria-current="page"]::after{opacity:1;transform:none}

/* 移动端折叠按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:12px 18px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(88,245,176,.45);
  background:linear-gradient(135deg,rgba(47,107,255,.95),rgba(122,92,255,.95));
  color:#fff;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  cursor:pointer;
  box-shadow:0 16px 34px -20px #000,0 0 0 1px rgba(255,255,255,.07) inset;
  transition:transform .18s ease,box-shadow .18s ease;
}
.nav-toggle:hover{transform:translateY(-2px);box-shadow:0 18px 38px -18px #000,var(--glow-blue)}
.nav-toggle-label{line-height:1}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,9vw,120px);
  background:
    radial-gradient(120% 90% at 12% 0%,rgba(122,92,255,.18),transparent 62%),
    radial-gradient(90% 70% at 92% 8%,rgba(47,107,255,.14),transparent 60%),
    var(--ink-900);
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:14px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,107,255,.9),rgba(88,245,176,.9),rgba(122,92,255,.9),transparent);
  box-shadow:0 0 16px rgba(88,245,176,.55);
}
.footer-inner{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.footer-status{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 16px;
  padding:16px 0;
  border-bottom:1px dashed var(--line);
  font-size:12.5px;
  letter-spacing:.05em;
}
.footer-status-time{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--green);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.3fr .8fr .8fr 1.2fr;
  gap:clamp(20px,3vw,44px);
  padding:clamp(28px,4vw,48px) 0;
}
.footer-brand{min-width:0}
.footer-note{
  margin-top:12px;
  max-width:26ch;
  font-size:13px;
  line-height:1.7;
  color:var(--muted);
}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-body);
  font-size:12px;
  font-weight:600;
  letter-spacing:.24em;
  color:var(--stone);
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-link{
  display:inline-block;
  font-size:13.5px;
  color:var(--muted);
  transition:color .18s ease,transform .18s ease;
}
.footer-link:hover{color:var(--green);transform:translateX(3px)}

.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact-item{
  display:block;
  font-size:13.5px;
  line-height:1.55;
  color:var(--text);
  word-break:break-word;
}
.footer-contact-key{
  display:block;
  margin-bottom:2px;
  font-size:11px;
  letter-spacing:.24em;
  color:var(--stone);
}
.footer-contact-note{font-size:12.5px;color:var(--muted)}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding:18px 0 26px;
  border-top:1px solid var(--line);
  font-size:12px;
  color:#8892ab;
}
.footer-legal p{max-width:70ch;line-height:1.7}
.footer-copy{
  font-family:var(--font-mono);
  letter-spacing:.08em;
  color:var(--stone);
}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:150;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border-radius:50%;
  border:1px solid rgba(88,245,176,.5);
  background:rgba(14,21,48,.94);
  color:var(--green);
  font-family:var(--font-mono);
  font-size:14px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  box-shadow:0 18px 34px -24px #000;
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,box-shadow .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{box-shadow:var(--glow-green)}

/* ---------- 7. 通用版心与章节 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.shell--narrow{max-width:820px}

.section{padding:clamp(40px,6vw,88px) 0}
.section-head{margin-bottom:clamp(20px,3vw,36px)}
.eyebrow{
  display:inline-block;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--green);
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(27px,4.2vw,52px);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.06;
}
.section-lead{
  margin-top:14px;
  max-width:58ch;
  font-size:clamp(15px,1.4vw,17px);
  line-height:1.8;
  color:var(--muted);
}
.annotation{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:12px;
  font-weight:500;
  letter-spacing:.32em;
  color:var(--stone);
}

/* ---------- 8. 容器组件 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.6vw,30px);
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  background:linear-gradient(165deg,rgba(14,21,48,.94),rgba(6,10,24,.94));
  box-shadow:var(--shadow-card);
}

.cut-card{
  position:relative;
  padding:clamp(18px,2.6vw,30px);
  background:linear-gradient(160deg,rgba(14,21,48,.97),rgba(6,10,24,.97));
  box-shadow:inset 0 0 0 1px rgba(47,107,255,.35),0 0 34px -18px rgba(47,107,255,.9);
  filter:drop-shadow(0 0 12px rgba(47,107,255,.2));
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.cut-card > :last-child{margin-bottom:0}

.paper-sheet{
  position:relative;
  padding:clamp(22px,3.4vw,40px);
  border:1px solid rgba(6,10,24,.14);
  border-radius:2px;
  background:var(--paper);
  color:#1B2333;
  box-shadow:6px 6px 0 rgba(185,180,166,.3),0 30px 60px -44px #000;
}
.paper-sheet h2,
.paper-sheet h3,
.paper-sheet h4{color:#0E1530}
.paper-sheet p,
.paper-sheet li{color:#2B344A;max-width:64ch}
.paper-sheet a{color:#1C47B8;text-decoration:underline;text-underline-offset:3px}
.paper-sheet a:hover{color:#0E1530}
.paper-sheet strong{color:#0E1530}

/* 数字面板 */
.stat-row{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(120px,1fr));
  gap:clamp(14px,2vw,26px);
}
.stat{display:flex;flex-direction:column;gap:4px;min-width:0}
.stat-value{
  font-family:var(--font-mono);
  font-size:clamp(24px,3vw,38px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--green);
}
.stat-value--accent{color:var(--orange)}
.stat-label{
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--muted);
}

/* ---------- 9. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  line-height:1.3;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.btn--primary{
  background:linear-gradient(120deg,var(--orange),#FF5A14);
  color:#180700;
  box-shadow:0 16px 32px -20px rgba(255,122,47,.95);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 20px 38px -18px rgba(255,122,47,1)}
.btn--ghost{
  background:rgba(47,107,255,.08);
  border-color:rgba(47,107,255,.5);
  color:var(--text);
}
.btn--ghost:hover{
  background:rgba(47,107,255,.18);
  border-color:rgba(47,107,255,.9);
  box-shadow:var(--glow-blue);
}
.btn--link{
  padding:0;
  border-radius:0;
  background:none;
  color:var(--green);
  font-weight:600;
}
.btn--link:hover{color:#fff;transform:translateX(3px)}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs{padding:18px 0 0;font-size:12.5px;color:var(--muted)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:rgba(167,176,199,.45)}
.breadcrumbs a{color:var(--muted);transition:color .18s ease}
.breadcrumbs a:hover{color:var(--green)}
.breadcrumbs [aria-current="page"]{color:var(--text)}

/* ---------- 11. 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,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--stagger > *:nth-child(even){transform:translateY(clamp(12px,2vw,28px))}

/* ---------- 12. 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:14px;
  background:
    linear-gradient(150deg,rgba(14,21,48,.96),rgba(6,10,24,.96));
  aspect-ratio:16 / 10;
  isolation:isolate;
}
.media-frame img,
.media-frame picture,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(47,107,255,.2),inset 0 -40px 60px -40px rgba(6,10,24,.9);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--empty{
  display:flex;
  align-items:center;
  justify-content:center;
  background-image:
    linear-gradient(rgba(27,35,80,.55) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,35,80,.55) 1px,transparent 1px);
  background-size:32px 32px;
}
.media-frame--empty::before{
  content:attr(data-label);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--stone);
  text-transform:uppercase;
}
.media-caption{
  margin-top:10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* ---------- 13. 章节索引 ---------- */
.toc{
  position:sticky;
  top:32px;
  display:flex;
  flex-direction:column;
  gap:11px;
  font-size:12.5px;
}
.toc-title{
  margin-bottom:4px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.28em;
  color:var(--stone);
  text-transform:uppercase;
}
.toc-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:3px 0;
  color:var(--muted);
  transition:color .2s ease;
}
.toc-link:hover{color:var(--text)}
.toc-tick{
  flex:none;
  width:8px;
  height:2px;
  border-radius:2px;
  background:var(--stone);
  transition:width .2s ease,background .2s ease,box-shadow .2s ease;
}
.toc-link[aria-current="true"]{color:var(--green)}
.toc-link[aria-current="true"] .toc-tick{
  width:28px;
  background:var(--green);
  box-shadow:0 0 10px rgba(88,245,176,.9);
}

/* ---------- 14. 入场 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
  will-change:opacity,transform;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1180px){
  .nav-item:nth-child(n){transform:translateY(0)}
  .nav-item:nth-child(odd){transform:translateY(6px)}
  .nav-link{font-size:13.5px;padding:6px 13px}
}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:880px){
  .header-inner{
    grid-template-columns:minmax(0,1fr) auto;
    align-items:center;
    gap:12px;
    padding:14px 16px 16px;
  }
  .brand-block{grid-column:1}
  .brand-mark{font-size:20px}
  .brand-sub{font-size:11px;letter-spacing:.18em}
  .header-middle{grid-column:2;justify-content:flex-end}
  .header-note{display:none}
  .header-utility{gap:8px}
  .status-chip{padding:4px 10px;font-size:11.5px}
  .cta-capsule{padding:7px 14px;font-size:13px}

  .split-nav{
    position:fixed;
    right:16px;
    bottom:86px;
    width:min(320px,calc(100vw - 32px));
    max-height:calc(100vh - 150px);
    overflow:auto;
    padding:16px;
    border-radius:22px;
    border:1px solid rgba(47,107,255,.45);
    background:linear-gradient(165deg,rgba(14,21,48,.99),rgba(6,10,24,.99));
    box-shadow:0 30px 70px -30px #000,0 0 0 1px rgba(88,245,176,.1) inset;
    opacity:0;
    visibility:hidden;
    transform:translateY(14px) scale(.97);
    transform-origin:100% 100%;
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
    z-index:130;
  }
  .split-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .split-nav::before{
    content:"";
    position:absolute;
    inset:12px -8px -10px 10px;
    border:1px solid rgba(122,92,255,.42);
    border-radius:22px;
    z-index:-1;
    pointer-events:none;
  }
  .nav-list{grid-template-columns:1fr;gap:8px;justify-content:stretch}
  .nav-item:nth-child(n){transform:none}
  .nav-link,
  .nav-item:nth-child(2n) .nav-link{
    width:100%;
    justify-content:space-between;
    padding:12px 16px;
    font-size:15px;
    background:rgba(27,35,80,.38);
  }
  .nav-link::after{opacity:1;transform:none}

  .nav-toggle{display:inline-flex;position:fixed;right:16px;bottom:16px;z-index:140}

  .to-top{left:16px;right:auto;bottom:18px;width:42px;height:42px}

  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:minmax(0,1fr)}
  .grid--stagger > *:nth-child(even){transform:none}
  .toc{position:static;flex-direction:row;flex-wrap:wrap;gap:8px 18px}
  .toc-title{width:100%;margin-bottom:0}
  .footer-status-time{margin-left:0}
}

@media (max-width:620px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:8px}
  .section{padding:34px 0}
  .paper-sheet{box-shadow:4px 4px 0 rgba(185,180,166,.3)}
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .nav-link:hover,
  .nav-link:focus-visible{transform:none}
}