/* ==========================================================================
   南宫28赛场 · 共享样式表 /assets/site.css
   夜间赛场指挥中心：蓝图网格、坐标编号、状态灯与路径轨道
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-950:#050A13;
  --ink-850:#0B1526;
  --ink-700:#122238;
  --ink-600:#1F3A5F;
  --cyan-450:#37E1F0;
  --orange-500:#FF6A1F;
  --lime-400:#8BE04A;
  --amber-400:#FFC24A;
  --red-500:#FF4D5E;
  --violet-500:#8A6BFF;
  --teal-500:#1FBFA7;
  --paper-050:#EDF4FA;
  --mist-400:#93A9BF;

  --accent:var(--cyan-450);
  --accent-ink:#03151A;

  --font-sans:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-serif:"Songti SC","Source Han Serif SC","Noto Serif SC",Georgia,"Times New Roman",serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell:1280px;
  --gutter:clamp(16px,4vw,32px);
  --grid:64px;
  --radius-s:6px;
  --radius-m:12px;
  --radius-l:20px;
  --radius-pill:999px;
  --hair:rgba(147,169,191,.16);
  --panel:rgba(11,21,38,.88);
  --shadow:0 22px 44px -28px rgba(0,0,0,.95);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
}

/* 注入强调色（专区紫 / 资讯青绿 / 帮助橙 / 状态绿 / 默认电光青） */
[data-inject="cyan"]{--accent:var(--cyan-450);--accent-ink:#03151A}
[data-inject="violet"]{--accent:var(--violet-500);--accent-ink:#0B0620}
[data-inject="teal"]{--accent:var(--teal-500);--accent-ink:#03130F}
[data-inject="orange"]{--accent:var(--orange-500);--accent-ink:#180702}
[data-inject="lime"]{--accent:var(--lime-400);--accent-ink:#0C1A03}

/* ---------- 2. 重置与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--paper-050);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(1100px 560px at 12% -12%,rgba(55,225,240,.10),transparent 62%),
    radial-gradient(920px 520px at 96% -6%,rgba(255,106,31,.09),transparent 58%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:700;line-height:1.2;letter-spacing:-.01em;margin:0 0 .5em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.15em 0}
img,svg,video{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--cyan-450);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--paper-050)}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--cyan-450);outline-offset:2px;border-radius:3px}
::selection{background:rgba(55,225,240,.28);color:var(--paper-050)}

.n28-skip{
  position:fixed;left:16px;top:-64px;z-index:300;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--cyan-450);color:var(--accent-ink);font-weight:700;
  transition:top var(--dur) var(--ease);
}
.n28-skip:focus{top:16px;color:var(--accent-ink)}
.n28-visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 3. 排版工具 ---------- */
.n28-display{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:clamp(40px,7vw,88px);
  line-height:1.02;
  letter-spacing:-.02em;
  margin:0 0 .4em;
}
.n28-h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;letter-spacing:-.01em;line-height:1.2}
.n28-h3{font-size:clamp(19px,2vw,22px);font-weight:700;line-height:1.3}
.n28-serif{font-family:var(--font-serif);font-weight:500;font-size:clamp(18px,2.1vw,24px);line-height:1.55;color:rgba(237,244,250,.9)}
.n28-mono{font-family:var(--font-mono);letter-spacing:.06em}
.n28-eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--mist-400);margin:0 0 .9em;
}
.n28-lead{font-size:clamp(16px,1.6vw,19px);line-height:1.8;color:rgba(237,244,250,.82);max-width:60ch}
.n28-prose{max-width:68ch;font-size:17px;line-height:1.75;color:rgba(237,244,250,.86)}
.n28-prose h2{margin-top:1.8em}
.n28-prose h3{margin-top:1.5em}
.n28-prose a{text-decoration:underline;text-underline-offset:3px}

/* ---------- 4. 布局 ---------- */
.n28-shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.n28-section{padding-block:clamp(48px,7vw,96px)}
.n28-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.n28-span-3{grid-column:span 3}
.n28-span-4{grid-column:span 4}
.n28-span-5{grid-column:span 5}
.n28-span-6{grid-column:span 6}
.n28-span-7{grid-column:span 7}
.n28-span-8{grid-column:span 8}
.n28-span-12{grid-column:span 12}

.n28-blueprint{
  background-image:
    linear-gradient(to right,rgba(31,58,95,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(31,58,95,.55) 1px,transparent 1px);
  background-size:var(--grid) var(--grid);
  background-position:center top;
}
.n28-rule{height:1px;border:0;margin:clamp(24px,3vw,40px) 0;background:linear-gradient(90deg,var(--ink-600),rgba(31,58,95,0))}
.n28-guide{
  height:clamp(40px,7vw,90px);width:1px;border:0;margin:0;
  background:linear-gradient(180deg,var(--accent),rgba(55,225,240,0));
  transform:rotate(24deg);transform-origin:top left;
}

/* ---------- 5. 通用按钮 ---------- */
.n28-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-sans);font-weight:700;font-size:15px;line-height:1;
  padding:12px 20px;border-radius:var(--radius-pill);
  border:1px solid transparent;background:transparent;cursor:pointer;
  text-decoration:none;white-space:nowrap;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.n28-btn--primary{background:var(--orange-500);color:#180702;box-shadow:0 12px 26px -16px rgba(255,106,31,.95)}
.n28-btn--primary:hover{background:#FF8138;color:#180702;transform:translateY(-2px)}
.n28-btn--ghost{border-color:var(--ink-600);color:var(--paper-050)}
.n28-btn--ghost:hover{border-color:var(--cyan-450);color:var(--cyan-450);transform:translateY(-2px)}
.n28-btn--accent{background:var(--accent);color:var(--accent-ink)}
.n28-btn--accent:hover{transform:translateY(-2px)}
.n28-btn--sm{padding:9px 15px;font-size:13px}
.n28-btn--lg{padding:16px 28px;font-size:17px}

/* ---------- 6. 徽章与状态 ---------- */
.n28-badge{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  padding:5px 10px;border-radius:var(--radius-pill);
  border:1px solid var(--ink-600);color:var(--mist-400);background:rgba(18,34,56,.6);
}
.n28-badge--cyan{color:var(--cyan-450);border-color:rgba(55,225,240,.4)}
.n28-badge--orange{color:var(--orange-500);border-color:rgba(255,106,31,.4)}
.n28-badge--lime{color:var(--lime-400);border-color:rgba(139,224,74,.4)}
.n28-badge--amber{color:var(--amber-400);border-color:rgba(255,194,74,.4)}
.n28-badge--red{color:var(--red-500);border-color:rgba(255,77,94,.4)}
.n28-badge--violet{color:var(--violet-500);border-color:rgba(138,107,255,.45)}
.n28-badge--teal{color:var(--teal-500);border-color:rgba(31,191,167,.45)}

.n28-status{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  padding:7px 11px;border-radius:var(--radius-pill);
  border:1px solid var(--ink-600);color:var(--mist-400);white-space:nowrap;
}
.n28-status__dot{width:7px;height:7px;border-radius:50%;background:currentColor;flex:none;animation:n28-pulse 2.8s ease-in-out infinite}
.n28-status--ok{color:var(--lime-400);border-color:rgba(139,224,74,.38)}
.n28-status--warn{color:var(--amber-400);border-color:rgba(255,194,74,.38)}
.n28-status--updated{color:var(--cyan-450);border-color:rgba(55,225,240,.38)}
.n28-status--error{color:var(--red-500);border-color:rgba(255,77,94,.42)}
@keyframes n28-pulse{0%,100%{opacity:1}50%{opacity:.32}}

/* ---------- 7. 卡片 / 面板 / 数据 ---------- */
.n28-card{
  position:relative;display:block;
  background:linear-gradient(160deg,rgba(18,34,56,.9),rgba(11,21,38,.9));
  border:1px solid var(--ink-600);border-radius:var(--radius-m);
  padding:clamp(18px,2.2vw,26px);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.n28-card__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--accent);display:block;margin-bottom:12px}
.n28-card__title{font-size:clamp(18px,2vw,22px);font-weight:700;margin:0 0 .55em}
.n28-card__text{margin:0;color:rgba(237,244,250,.78);font-size:15.5px}
.n28-card--link{color:inherit}
.n28-card--link:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow);color:inherit}

.n28-panel{
  background:var(--ink-850);border:1px solid var(--ink-600);
  border-radius:var(--radius-m);padding:clamp(18px,2.4vw,26px);
}
.n28-data{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1px;background:var(--ink-600);border:1px solid var(--ink-600);border-radius:var(--radius-m);overflow:hidden}
.n28-data__row{background:var(--ink-850);padding:16px 18px}
.n28-data__k{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--mist-400);margin-bottom:8px}
.n28-data__v{display:block;font-family:var(--font-mono);font-size:20px;letter-spacing:.04em;color:var(--paper-050)}

/* ---------- 8. 图片容器（页面阶段放置占位图） ---------- */
.n28-figure{margin:0}
.n28-figure__caption{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist-400);margin-top:10px}
.n28-media{
  position:relative;overflow:hidden;
  border:1px solid var(--ink-600);border-radius:var(--radius-m);
  background:linear-gradient(150deg,var(--ink-700),var(--ink-850));
  aspect-ratio:16/10;
}
.n28-media img,.n28-media video{width:100%;height:100%;object-fit:cover;display:block}
.n28-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(180deg,rgba(5,10,19,.22) 0 1px,transparent 1px 3px),
    linear-gradient(180deg,rgba(55,225,240,.10),rgba(5,10,19,.42) 78%);
  mix-blend-mode:normal;
}
.n28-media--phone{aspect-ratio:9/19;max-width:320px}
.n28-media--city{aspect-ratio:21/9}
.n28-media--panel{aspect-ratio:4/3}
.n28-media--icon{aspect-ratio:1/1;max-width:160px}
.n28-media--tall{aspect-ratio:4/5}
.n28-media--wide{aspect-ratio:21/9}
.n28-media--glow{box-shadow:0 0 0 1px rgba(55,225,240,.18),0 28px 60px -34px rgba(55,225,240,.55)}

/* ---------- 9. 纵向步骤轨道 ---------- */
.n28-track{list-style:none;margin:0;padding:0 0 0 28px;border-left:1px solid var(--ink-600)}
.n28-track__item{position:relative;padding-bottom:clamp(22px,3vw,34px)}
.n28-track__item::before{
  content:"";position:absolute;left:-33px;top:7px;width:9px;height:9px;border-radius:50%;
  background:var(--ink-950);border:2px solid var(--ink-600);
}
.n28-track__item[data-state="done"]::before{border-color:var(--lime-400);background:var(--lime-400)}
.n28-track__item[data-state="current"]::before{border-color:var(--accent);box-shadow:0 0 0 4px rgba(55,225,240,.16)}
.n28-track__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--mist-400);display:block;margin-bottom:6px}
.n28-track__body{margin:0;color:rgba(237,244,250,.84);font-size:15.5px}

/* ---------- 10. 面包屑 ---------- */
.n28-breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--mist-400);padding-block:16px;
}
.n28-breadcrumb a{color:var(--mist-400)}
.n28-breadcrumb a:hover{color:var(--cyan-450)}
.n28-breadcrumb__sep{color:var(--ink-600)}
.n28-breadcrumb [aria-current="page"]{color:var(--paper-050)}

/* ---------- 11. 头部 ---------- */
.n28-header{position:sticky;top:0;z-index:90;padding:16px clamp(12px,3vw,28px) 0}
.n28-header__shell{
  position:relative;display:flex;align-items:center;gap:12px;
  max-width:var(--shell);margin-inline:auto;
}
.n28-island{
  background:var(--panel);border:1px solid var(--ink-600);border-radius:var(--radius-pill);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
}
.n28-brand{
  display:inline-flex;align-items:center;gap:10px;flex:none;
  padding:8px 16px 8px 12px;border-radius:var(--radius-pill);
  background:var(--panel);border:1px solid var(--ink-600);
  color:var(--paper-050);text-decoration:none;
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:border-color var(--dur) var(--ease);
}
.n28-brand:hover{border-color:var(--cyan-450);color:var(--paper-050)}
.n28-brand__mark{
  position:relative;flex:none;width:26px;height:26px;border-radius:8px;
  border:1px solid rgba(55,225,240,.55);
  background:radial-gradient(circle at 30% 25%,rgba(55,225,240,.35),transparent 65%);
  display:grid;place-items:center;
}
.n28-brand__axis{display:block;width:11px;height:11px;border-left:2px solid var(--cyan-450);border-bottom:2px solid var(--cyan-450);position:relative}
.n28-brand__axis::after{content:"";position:absolute;right:-4px;top:-4px;width:5px;height:5px;border-radius:50%;background:var(--orange-500)}
.n28-brand__text{display:flex;flex-direction:column;line-height:1.15}
.n28-brand__name{font-weight:900;font-size:16px;letter-spacing:.02em}
.n28-brand__tag{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist-400)}

.n28-capsule{
  display:flex;align-items:center;justify-content:center;gap:6px;
  flex:1 1 auto;min-width:0;padding:6px;margin-inline:auto;
}
.n28-steps{position:relative;flex:none}
.n28-steps__toggle{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--cyan-450);background:rgba(55,225,240,.08);
  border:1px solid rgba(55,225,240,.38);border-radius:var(--radius-pill);
  padding:8px 12px;cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.n28-steps__toggle:hover{background:rgba(55,225,240,.16)}
.n28-steps__toggle::after{
  content:"";width:7px;height:7px;flex:none;
  border-right:1px solid currentColor;border-bottom:1px solid currentColor;
  transform:rotate(45deg);transition:transform var(--dur) var(--ease);
}
.n28-steps__toggle[aria-expanded="true"]::after{transform:rotate(-135deg)}
.n28-steps__panel{
  position:absolute;top:calc(100% + 12px);left:0;z-index:100;
  width:min(340px,86vw);padding:16px;
  background:var(--ink-850);border:1px solid var(--ink-600);
  border-radius:var(--radius-m);box-shadow:var(--shadow);
}
.n28-steps__label{margin:0 0 12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist-400)}
.n28-steps__list{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.n28-steps__item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-s)}
.n28-steps__item:hover{background:rgba(31,58,95,.5)}
.n28-steps__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--orange-500)}
.n28-steps__item a{color:var(--paper-050);font-size:14.5px;font-weight:600}
.n28-steps__item a:hover{color:var(--cyan-450)}

.n28-nav__list{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.n28-nav__link{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:500;color:rgba(237,244,250,.82);
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.n28-nav__link::before{content:"";width:6px;height:6px;border-radius:50%;background:transparent;flex:none}
.n28-nav__link:hover{background:rgba(31,58,95,.5);color:var(--paper-050)}
.n28-nav__link[aria-current="page"]{
  color:var(--paper-050);background:rgba(237,244,250,.06);
  box-shadow:inset 0 0 0 1px var(--accent);
}
.n28-nav__link[aria-current="page"]::before{background:var(--accent);box-shadow:0 0 8px var(--accent)}
.n28-nav__actions{display:none}

.n28-tools{display:flex;align-items:center;gap:8px;flex:none;padding:6px}
.n28-tool{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--mist-400);padding:8px 12px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.n28-tool:hover{color:var(--cyan-450);border-color:var(--ink-600)}

.n28-navtoggle{
  display:none;align-items:center;gap:9px;
  background:rgba(55,225,240,.08);border:1px solid rgba(55,225,240,.38);
  color:var(--paper-050);border-radius:var(--radius-pill);
  padding:9px 14px;font-size:13px;font-weight:700;cursor:pointer;
}
.n28-navtoggle__bars{position:relative;width:16px;height:10px;flex:none}
.n28-navtoggle__bars::before,
.n28-navtoggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.n28-navtoggle__bars::before{top:1px}
.n28-navtoggle__bars::after{bottom:1px}
.n28-header[data-open] .n28-navtoggle__bars::before{transform:translateY(3.5px) rotate(45deg)}
.n28-header[data-open] .n28-navtoggle__bars::after{transform:translateY(-3.5px) rotate(-45deg)}

/* 头部：平板与手机折叠为面板 */
@media (max-width:1200px){
  .n28-navtoggle{display:inline-flex}
  .n28-tools>.n28-tool,
  .n28-tools>.n28-btn{display:none}
  .n28-capsule{justify-content:flex-start}
  .n28-nav{
    position:absolute;top:calc(100% + 12px);left:0;right:0;z-index:100;
    display:none;padding:12px;
    background:var(--ink-850);border:1px solid var(--ink-600);
    border-radius:var(--radius-l);box-shadow:var(--shadow);
    max-height:min(72vh,560px);overflow:auto;
  }
  .n28-header[data-open] .n28-nav{display:block}
  .n28-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .n28-nav__link{padding:13px 14px;border-radius:var(--radius-s);font-size:16px}
  .n28-nav__link[aria-current="page"]{background:rgba(237,244,250,.05)}
  .n28-nav__actions{
    display:flex;flex-wrap:wrap;gap:10px;
    margin-top:12px;padding:12px 6px 4px;
    border-top:1px solid var(--ink-600);
  }
}
@media (max-width:760px){
  .n28-header{padding:10px 12px 0}
  .n28-brand{padding:6px 12px 6px 10px}
  .n28-capsule{padding:5px}
}
@media (max-width:560px){
  .n28-brand__tag{display:none}
  .n28-tools>.n28-status{display:none}
  .n28-navtoggle__text{display:none}
  .n28-navtoggle{padding:9px 12px}
}

/* ---------- 12. 页脚 ---------- */
.n28-footer{
  position:relative;margin-top:clamp(64px,9vw,120px);
  background:var(--ink-950);border-top:1px solid var(--ink-600);
}
.n28-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:repeating-linear-gradient(90deg,var(--cyan-450) 0 10px,transparent 10px 26px);
  opacity:.45;
}
.n28-footer__inner{padding-block:clamp(40px,6vw,72px)}
.n28-footer__top{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px 32px;padding-bottom:clamp(22px,3vw,32px);
  border-bottom:1px solid var(--ink-600);
}
.n28-brand--footer{background:transparent;border-color:transparent;padding:0;box-shadow:none}
.n28-brand--footer:hover{border-color:transparent}
.n28-footer__update{margin:0;max-width:52ch;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--mist-400)}
.n28-footer__grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);padding-block:clamp(28px,4vw,46px);
}
.n28-footer__col{display:block}
.n28-footer__title{
  margin:0 0 14px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.14em;color:var(--cyan-450);
}
.n28-footer__list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.n28-footer__list li{margin:0}
.n28-footer__link{
  display:inline-block;color:rgba(237,244,250,.78);font-size:14.5px;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.n28-footer__link::before{
  content:"";display:inline-block;width:10px;height:1px;margin-right:8px;
  vertical-align:middle;background:var(--ink-600);
  transition:background-color var(--dur) var(--ease),width var(--dur) var(--ease);
}
.n28-footer__link:hover{color:var(--cyan-450);transform:translateX(2px)}
.n28-footer__link:hover::before{background:var(--cyan-450);width:16px}
.n28-footer__meta{margin:14px 0 0;font-family:var(--font-mono);font-size:12.5px;line-height:1.9;letter-spacing:.03em;color:var(--mist-400);overflow-wrap:anywhere}
.n28-footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 28px;padding-top:22px;border-top:1px solid var(--ink-600);
}
.n28-footer__legal-links{list-style:none;display:flex;flex-wrap:wrap;gap:18px;margin:0;padding:0}
.n28-footer__legal-links li{margin:0}
.n28-footer__legal-links .n28-footer__link{font-size:13.5px}
.n28-footer__legal-line{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--mist-400)}
.n28-footer__copy{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--ink-600)}
@media (max-width:900px){
  .n28-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .n28-footer__grid{grid-template-columns:1fr;gap:26px}
  .n28-footer__legal{flex-direction:column;align-items:flex-start}
}

/* ---------- 13. 滚动进度 / 回到顶部 / 显现 ---------- */
.n28-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:200;pointer-events:none}
.n28-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--cyan-450),var(--orange-500));
  transform:scaleX(0);transform-origin:0 50%;
}
.n28-top{
  position:fixed;right:clamp(12px,3vw,28px);bottom:clamp(12px,3vw,28px);z-index:120;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--radius-pill);
  background:var(--panel);border:1px solid var(--ink-600);color:var(--mist-400);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;cursor:pointer;
  opacity:0;visibility:hidden;
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease),
             color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.n28-top[data-visible]{opacity:1;visibility:visible}
.n28-top:hover{color:var(--cyan-450);border-color:var(--cyan-450)}

[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity 460ms var(--ease),transform 460ms var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式网格与动效偏好 ---------- */
@media (max-width:900px){
  .n28-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .n28-span-3,.n28-span-4,.n28-span-5{grid-column:span 3}
  .n28-span-6,.n28-span-7,.n28-span-8,.n28-span-12{grid-column:span 6}
  .n28-media--phone{max-width:260px}
}
@media (max-width:600px){
  .n28-grid{grid-template-columns:1fr}
  [class*="n28-span-"]{grid-column:1 / -1}
  .n28-media--city,.n28-media--wide{aspect-ratio:16/9}
  .n28-data__v{font-size:18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .n28-status__dot{animation:none}
  [data-reveal]{opacity:1;transform:none}
  .n28-card--link:hover,.n28-btn:hover,.n28-footer__link:hover{transform:none}
  .n28-top{transition:none}
}