/* =========================================================
   宝威赛场 · 共享站点样式 /assets/site.css
   墨绿深渊底 · 电光青 / 荧光橙 / 扎染蓝紫 · 框架式导航
   ========================================================= */

:root{
  --ink:#081C17;
  --ink-2:#0F2E26;
  --ink-3:#0B241D;
  --paper:#F5EFE1;
  --brown:#211A15;
  --cyan:#22E6D3;
  --orange:#FF6B1A;
  --ember:#E84A1D;
  --tie:#6C5CE7;
  --tie-2:#A78BFF;
  --muted:#9DB5AA;
  --glass:rgba(245,239,225,.08);
  --line:rgba(245,239,225,.14);
  --line-strong:rgba(245,239,225,.28);
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --font-body:"Noto Sans SC","Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --shell:1440px;
  --pad:clamp(16px,4vw,40px);
  --radius:2px;
}

/* ---------- 0. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:140px}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
::selection{background:var(--cyan);color:#04211C}

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

/* ---------- 1. 排版基座 ---------- */
h1,h2,h3,h4{
  margin:0;
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--paper);
}
h1{font-size:clamp(38px,6vw,72px)}
h2{font-size:clamp(28px,3.6vw,48px)}
h3{font-size:clamp(20px,2.6vw,32px)}
h4{font-size:clamp(17px,1.6vw,20px)}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lede{max-width:62ch;font-size:clamp(17px,1.5vw,19px);color:var(--muted);line-height:1.75}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

.rule{height:3px;border:0;margin:0;background:linear-gradient(90deg,var(--orange),var(--tie),var(--cyan));opacity:.9}
.hairline{height:1px;border:0;margin:0;background:var(--line)}

/* ---------- 2. 布局容器 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.container{width:100%;max-width:1120px;margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{padding:clamp(44px,6vw,84px) 0}
.stack{display:grid;gap:14px}

.grid{display:grid;gap:clamp(16px,2vw,26px)}
.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--board{grid-template-columns:240px minmax(0,1fr) 320px;align-items:start}

/* ---------- 3. 底色节奏 ---------- */
.surface-ink{background:var(--ink)}
.surface-deep{
  background:
    radial-gradient(1100px 560px at 12% -12%,rgba(108,92,231,.20),transparent 62%),
    radial-gradient(900px 520px at 92% 0%,rgba(34,230,211,.13),transparent 58%),
    var(--ink);
}
.surface-paper{background:var(--paper);color:var(--brown)}
.surface-paper h1,.surface-paper h2,.surface-paper h3,.surface-paper h4{color:var(--brown)}
.surface-glass{background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--line)}

/* ---------- 4. 章节体系 ---------- */
.chapter{position:relative;padding:clamp(52px,7vw,104px) 0;border-top:1px solid var(--line)}
.chapter:first-of-type{border-top:0}
.chapter-head{display:grid;gap:12px;margin-bottom:clamp(24px,3vw,40px)}
.chapter-index{
  display:block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(44px,8vw,110px);
  line-height:.86;
  letter-spacing:-.05em;
  color:rgba(34,230,211,.16);
  -webkit-text-stroke:1px rgba(34,230,211,.38);
}
.chapter-kicker{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--orange);
}
.chapter-title{font-size:clamp(26px,4.2vw,50px);max-width:24ch}
.chapter-lede{max-width:64ch;font-size:17px;color:var(--muted)}
.chapter--paper{background:var(--paper);color:var(--brown)}
.chapter--paper .chapter-title{color:var(--brown)}
.chapter--paper .chapter-index{color:rgba(232,74,29,.16);-webkit-text-stroke:1px rgba(232,74,29,.42)}
.chapter--paper .chapter-kicker{color:var(--ember)}
.chapter--paper .chapter-lede{color:rgba(33,26,21,.74)}

/* ---------- 5. 正文容器 ---------- */
.prose{max-width:72ch;font-size:17px;line-height:1.78;color:var(--paper)}
.prose h2{font-size:clamp(24px,3vw,34px);margin:1.6em 0 .55em}
.prose h3{font-size:clamp(19px,2vw,24px);margin:1.4em 0 .5em}
.prose p{margin:0 0 1.05em}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--orange)}
.prose strong{color:var(--cyan);font-weight:700}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.35em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li{margin:.42em 0}
.prose blockquote{margin:1.4em 0;padding:12px 20px;border-left:3px solid var(--orange);background:var(--glass);color:var(--muted)}
.surface-paper .prose{color:rgba(33,26,21,.88)}
.surface-paper .prose strong{color:var(--ember)}
.surface-paper .prose a{color:var(--ember)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.1;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);color:#1A0E05;box-shadow:0 10px 24px rgba(255,107,26,.26)}
.btn--primary:hover{box-shadow:0 16px 32px rgba(255,107,26,.36)}
.btn--accent{background:var(--cyan);color:#04211C;box-shadow:0 10px 24px rgba(34,230,211,.22)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:var(--glass)}
.btn--dark{background:var(--brown);color:var(--paper)}

/* ---------- 7. 卡片 ---------- */
.card{
  position:relative;
  padding:22px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(34,230,211,.45);box-shadow:var(--shadow)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.card-title{margin:0;font-family:var(--font-head);font-weight:900;font-size:20px;letter-spacing:-.01em}
.card-text{margin:0;font-size:15px;line-height:1.72;color:var(--muted)}
.card-meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.card-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.card--paper{background:var(--paper);color:var(--brown);border-color:rgba(33,26,21,.14)}
.card--paper .card-title{color:var(--brown)}
.card--paper .card-text{color:rgba(33,26,21,.76)}
.card--paper .card-meta{color:rgba(33,26,21,.55)}
.card--glass{background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-color:var(--line-strong)}

/* ---------- 8. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(245,239,225,.04);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan);border-color:rgba(34,230,211,.42);background:rgba(34,230,211,.09)}
.tag--orange{color:var(--orange);border-color:rgba(255,107,26,.44);background:rgba(255,107,26,.1)}
.tag--dye{color:var(--tie-2);border-color:rgba(167,139,255,.42);background:linear-gradient(135deg,rgba(108,92,231,.24),rgba(167,139,255,.08))}
.tag--muted{color:var(--muted)}

/* ---------- 9. 档案夹 ---------- */
.folder{position:relative;margin-top:16px;padding:26px 22px 22px;background:var(--ink-2);border:1px solid var(--line-strong);border-radius:var(--radius)}
.folder-tab{
  position:absolute;
  top:-13px;left:18px;
  padding:4px 13px;
  background:var(--cyan);
  color:#04211C;
  border-radius:2px 2px 0 0;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
}
.folder-body{display:grid;gap:12px}

/* ---------- 10. 时间轴 ---------- */
.timeline{position:relative;display:grid;gap:20px}
.timeline::before{
  content:"";
  position:absolute;left:7px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--cyan),rgba(108,92,231,.55),transparent);
}
.timeline-item{position:relative;padding-left:34px}
.timeline-dot{
  position:absolute;left:0;top:8px;
  width:15px;height:15px;border-radius:50%;
  background:var(--ink);
  border:2px solid var(--cyan);
  box-shadow:0 0 0 4px rgba(34,230,211,.12);
}
.timeline-time{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--orange)}
.timeline-title{margin:4px 0 2px;font-size:16px;font-weight:700}
.timeline-text{margin:0;font-size:14px;color:var(--muted)}

/* ---------- 11. 数据统计 ---------- */
.stat-row{display:flex;flex-wrap:wrap;gap:clamp(18px,4vw,46px)}
.stat{min-width:96px}
.stat-value{font-family:var(--font-mono);font-weight:700;font-size:clamp(26px,3.4vw,40px);line-height:1;letter-spacing:-.02em;color:var(--cyan);font-variant-numeric:tabular-nums}
.stat-label{margin-top:9px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}

/* ---------- 12. 手风琴 ---------- */
.accordion{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.accordion-item + .accordion-item{border-top:1px solid var(--line)}
.accordion-trigger{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:20px 22px;
  text-align:left;
  font-family:var(--font-body);font-size:17px;font-weight:700;
  color:var(--paper);
  cursor:pointer;
  transition:color .18s ease,background .18s ease;
}
.accordion-trigger:hover{color:var(--cyan);background:var(--glass)}
.accordion-trigger[aria-expanded="true"]{color:var(--cyan)}
.accordion-icon{flex:0 0 auto;font-family:var(--font-mono);font-size:15px;color:var(--orange)}
.accordion-panel{padding:0 22px 20px;font-size:15px;line-height:1.75;color:var(--muted)}
.accordion-panel[hidden]{display:none}

/* ---------- 13. 标签页 ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.tab{
  padding:9px 16px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
  cursor:pointer;
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.tab:hover{color:var(--cyan);border-color:rgba(34,230,211,.45)}
.tab[aria-selected="true"]{background:var(--cyan);border-color:transparent;color:#04211C;font-weight:700}
.tab-panel{margin-top:22px}
.tab-panel[hidden]{display:none}

/* ---------- 14. 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.filter-chip{
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
  cursor:pointer;
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.filter-chip:hover{color:var(--paper);border-color:var(--line-strong)}
.filter-chip[aria-pressed="true"]{background:var(--orange);border-color:transparent;color:#1A0E05;font-weight:700}

/* ---------- 15. 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:rgba(245,239,225,.3)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--cyan)}

/* ---------- 16. 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  aspect-ratio:16/10;
  background:
    linear-gradient(135deg,rgba(108,92,231,.25),rgba(8,28,23,.92) 58%),
    var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.96) contrast(1.06)}
.media-frame::after{
  content:"";
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(8,28,23,0) 42%,rgba(8,28,23,.86));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted)}
.media-tag{
  position:absolute;left:14px;bottom:14px;z-index:2;
  padding:5px 11px;
  background:rgba(8,28,23,.82);
  border:1px solid rgba(34,230,211,.42);
  border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);
}

/* ---------- 17. 跳过链接 ---------- */
.skip-link{
  position:absolute;left:var(--pad);top:-72px;z-index:200;
  padding:11px 20px;
  background:var(--cyan);color:#04211C;
  font-weight:700;font-size:14px;letter-spacing:.06em;
  border-radius:0 0 2px 2px;
  transition:top .2s ease;
}
.skip-link:focus{top:0}

/* ---------- 18. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(8,28,23,.93);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 12px 32px rgba(0,0,0,.38);
}
.site-header::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--ember) 0 16%,var(--orange) 16% 34%,var(--cyan) 34% 64%,var(--tie) 64% 100%);
}
.header-shell{position:relative;width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--pad)}

.header-top{display:flex;align-items:center;gap:18px;min-height:70px;padding-top:3px}

.brand{display:inline-flex;align-items:center;gap:13px;min-width:0}
.brand-mark{
  flex:0 0 auto;
  display:grid;place-items:center;
  width:42px;height:42px;
  background:linear-gradient(135deg,var(--cyan),var(--tie-2));
  color:#04211C;
  font-family:var(--font-mono);font-weight:700;font-size:14px;letter-spacing:.06em;
  border-radius:2px;
  box-shadow:0 8px 20px rgba(34,230,211,.22);
}
.brand-copy{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-name{font-family:var(--font-head);font-weight:900;font-size:20px;letter-spacing:.02em;color:var(--paper)}
.brand-tagline{font-size:12px;letter-spacing:.06em;color:var(--muted);white-space:nowrap}

.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.tool-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 13px;
  border:1px solid rgba(34,230,211,.34);
  border-radius:999px;
  background:var(--glass);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);
}
.tool-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--orange);
  animation:pulse-dot 2.4s ease-out infinite;
}
@keyframes pulse-dot{
  0%,100%{box-shadow:0 0 0 0 rgba(255,107,26,.55)}
  50%{box-shadow:0 0 0 6px rgba(255,107,26,0)}
}

.nav-toggle{
  display:none;
  align-items:center;gap:10px;
  padding:10px 15px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:var(--glass);
  color:var(--paper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bar{position:relative;display:block;width:18px;height:2px;background:var(--cyan);transition:background .2s ease}
.nav-toggle-bar::before,.nav-toggle-bar::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cyan);
  transition:transform .22s ease;
}
.nav-toggle-bar::before{top:-6px}
.nav-toggle-bar::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-label{white-space:nowrap}

.site-nav{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:56px;
  border-top:1px solid var(--line);
}
.nav-list{display:flex;flex-wrap:wrap;align-items:stretch;counter-reset:nav}
.nav-item{display:flex}
.nav-link{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 16px;
  border-bottom:2px solid transparent;
  border-left:1px solid var(--line);
  font-size:14px;font-weight:600;letter-spacing:.08em;
  color:var(--paper);
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.nav-item:first-child .nav-link{border-left-color:transparent}
.nav-link::before{
  counter-increment:nav;
  content:"0" counter(nav);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--muted);
  transition:color .18s ease;
}
.nav-link:hover{color:var(--cyan);background:var(--glass);border-bottom-color:rgba(34,230,211,.5)}
.nav-link:hover::before{color:var(--cyan)}
.nav-link[aria-current="page"]{color:var(--cyan);background:var(--glass);border-bottom-color:var(--orange)}
.nav-link[aria-current="page"]::before{color:var(--orange)}
.nav-clock{
  margin-left:auto;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--muted);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}

/* ---------- 19. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-2);
  border-top:1px solid var(--line);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--tie) 45%,var(--orange));
}
.footer-shell{width:100%;max-width:var(--shell);margin:0 auto;padding:clamp(40px,5vw,62px) var(--pad) 28px}

.footer-top{
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(0,1fr));
  gap:clamp(22px,3vw,42px);
}
.footer-brand{display:grid;gap:8px;justify-items:start;align-content:start}
.footer-name{margin:6px 0 0;font-family:var(--font-head);font-weight:900;font-size:24px;letter-spacing:.01em;color:var(--paper)}
.footer-line{font-size:14px;line-height:1.7;color:var(--muted);max-width:34ch}
.footer-domain{
  margin-top:4px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--cyan);
}

.footer-col{display:grid;gap:0;align-content:start}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;
  color:var(--orange);
}
.footer-links{display:grid;gap:10px}
.footer-links a{
  display:inline-block;
  font-size:15px;color:rgba(245,239,225,.86);
  transition:color .18s ease,transform .18s ease;
}
.footer-links a:hover{color:var(--cyan);transform:translateX(4px)}

.footer-contact{
  margin-top:clamp(30px,4vw,42px);
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:16px 26px;
  padding:20px 22px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.contact-row{display:flex;flex-direction:column;gap:5px;min-width:0}
.contact-row--wide{grid-column:1 / -1}
.contact-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--orange)}
.contact-value{font-size:14px;line-height:1.6;color:var(--paper);word-break:break-word}

.footer-bottom{
  margin-top:30px;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted);
}
.footer-copy{margin:0}
.footer-icp{margin:0;color:var(--muted)}

/* ---------- 20. 滚动进度与返回顶部 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:90;
  width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--tie-2) 55%,var(--orange));
  pointer-events:none;
}
.to-top{
  position:fixed;right:clamp(14px,2vw,28px);bottom:clamp(14px,2vw,28px);z-index:70;
  display:grid;place-items:center;
  width:46px;height:46px;
  background:rgba(8,28,23,.86);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  color:var(--paper);
  font-family:var(--font-mono);font-size:18px;
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,visibility .25s ease,transform .25s ease,border-color .18s ease,color .18s ease;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 21. 滚动显现 ---------- */
[data-reveal].reveal-armed{opacity:0;transform:translateY(18px)}
[data-reveal].reveal-armed.is-visible{
  opacity:1;transform:none;
  transition:opacity .55s ease,transform .55s cubic-bezier(.2,.7,.3,1);
}

/* ---------- 22. 响应式 ---------- */
@media (max-width:1180px){
  .grid--board{grid-template-columns:minmax(0,1fr) 300px}
  .footer-top{grid-template-columns:1.2fr repeat(3,minmax(0,1fr));gap:24px}
}

@media (max-width:980px){
  html{scroll-padding-top:120px}
  .nav-toggle{display:inline-flex}
  .header-tools{display:none}
  .site-nav{
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    min-height:0;
    padding:6px 0 16px;
  }
  .site-nav[data-open]{display:flex;max-height:calc(100vh - 130px);overflow-y:auto}
  .nav-list{flex-direction:column;width:100%}
  .nav-item{width:100%}
  .nav-link{
    width:100%;
    padding:14px 4px;
    border-left:0;
    border-bottom:1px solid var(--line);
  }
  .nav-item:first-child .nav-link{border-left-color:transparent}
  .nav-link:hover{background:transparent}
  .nav-link[aria-current="page"]{background:transparent;border-bottom-color:var(--line)}
  .nav-link[aria-current="page"]::before{color:var(--orange)}
  .nav-clock{margin:12px 4px 0}
  .grid--2,.grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--board{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  body{font-size:16px}
  .header-top{min-height:62px;gap:12px}
  .brand-mark{width:36px;height:36px;font-size:12px}
  .brand-name{font-size:17px}
  .brand-tagline{display:none}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .card{padding:18px}
  .accordion-trigger{padding:17px 16px;font-size:16px}
  .accordion-panel{padding:0 16px 18px}
}

@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].reveal-armed{opacity:1;transform:none}
  .btn:hover,.card:hover,.footer-links a:hover{transform:none}
  .tool-dot{animation:none}
}