/* ============================================================
   AIRREM 领航 · 机场推荐榜  —  shared stylesheet
   Aesthetic: night-flight / global route map
   midnight indigo + aurora (cyan·violet·magenta) + runway amber
   ============================================================ */

:root{
  color-scheme: dark;

  /* surfaces */
  --bg:      #060917;
  --bg-1:    #090E22;
  --bg-2:    #0E1533;
  --panel:   rgba(255,255,255,.038);
  --panel-2: rgba(255,255,255,.06);
  --brd:     rgba(255,255,255,.085);
  --brd-2:   rgba(255,255,255,.14);

  /* ink */
  --ink:   #EAEEFC;
  --ink-2: #AAB2D6;
  --ink-3: #6C7599;

  /* aurora */
  --cyan:    #35E0D4;
  --violet:  #7E7BFF;
  --magenta: #FF6AD5;
  --amber:   #FFB24C;
  --amber-2: #FF8A3D;
  --good:    #4FE6A6;
  --warn:    #FFC861;

  --grad-aurora: linear-gradient(100deg,#35E0D4 0%,#7E7BFF 48%,#FF6AD5 100%);
  --grad-runway: linear-gradient(100deg,#FFB24C 0%,#FF8A3D 100%);

  --radius:   18px;
  --radius-s: 12px;
  --radius-l: 26px;

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

  --wrap: 1160px;
  --shadow: 0 24px 60px -24px rgba(3,6,20,.9);
  --glow: 0 0 0 1px var(--brd), 0 30px 80px -40px rgba(126,123,255,.55);
}

/* ---------- reset ---------- */
*{box-sizing:border-box}
*::selection{background:rgba(126,123,255,.35);color:#fff}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.12;letter-spacing:-.01em;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

/* ---------- ambient aurora background ---------- */
body::before,body::after{content:"";position:fixed;z-index:-2;pointer-events:none;filter:blur(70px);opacity:.55}
body::before{
  width:60vw;height:60vw;left:-14vw;top:-16vw;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(53,224,212,.55),transparent 60%);
  animation:drift1 26s ease-in-out infinite alternate;
}
body::after{
  width:64vw;height:64vw;right:-18vw;top:4vh;border-radius:50%;
  background:radial-gradient(circle at 60% 40%,rgba(255,106,213,.4),rgba(126,123,255,.32) 55%,transparent 70%);
  animation:drift2 32s ease-in-out infinite alternate;
}
.bg-grid{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.4;
  background:
    radial-gradient(circle at 50% -10%,rgba(126,123,255,.12),transparent 55%),
    linear-gradient(transparent 0,var(--bg) 78%),
    repeating-linear-gradient(90deg,rgba(255,255,255,.025) 0 1px,transparent 1px 76px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.02) 0 1px,transparent 1px 76px);
}
@keyframes drift1{to{transform:translate(6vw,5vh) scale(1.12)}}
@keyframes drift2{to{transform:translate(-5vw,4vh) scale(1.15)}}
@media (prefers-reduced-motion:reduce){body::before,body::after{animation:none}}

/* ---------- layout ---------- */
.wrap{width:min(100% - 40px,var(--wrap));margin-inline:auto}
.section{padding:clamp(56px,9vw,110px) 0}
.section-sm{padding:clamp(40px,6vw,64px) 0}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--cyan);display:inline-flex;align-items:center;gap:9px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.sec-head{max-width:660px;margin-bottom:44px}
.sec-head h2{font-size:clamp(28px,4.4vw,44px)}
.sec-head p{color:var(--ink-2);margin-top:14px;font-size:clamp(15px,1.6vw,17px)}
.center{text-align:center;margin-inline:auto}
.center .eyebrow{justify-content:center}
.center .eyebrow::after{content:"";width:26px;height:1px;background:linear-gradient(270deg,var(--cyan),transparent)}

.grad-text{background:var(--grad-aurora);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- header / nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(6,9,23,.86),rgba(6,9,23,.5));
  border-bottom:1px solid var(--brd)}
.nav-in{display:flex;align-items:center;gap:22px;height:66px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:-.02em}
.brand .mark{width:30px;height:30px;flex:none}
.brand small{font-family:var(--font-mono);font-weight:500;font-size:10px;letter-spacing:.24em;color:var(--ink-3);text-transform:uppercase;display:block;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{padding:9px 14px;border-radius:10px;color:var(--ink-2);font-size:14.5px;font-weight:500;transition:.18s}
.nav-links a:hover{color:var(--ink);background:var(--panel)}
.nav-cta{margin-left:6px}
.nav-toggle{display:none;margin-left:auto;background:var(--panel);border:1px solid var(--brd);color:var(--ink);
  width:42px;height:42px;border-radius:11px;cursor:pointer;font-size:18px;align-items:center;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:600;
  font-size:15px;padding:13px 22px;border-radius:13px;cursor:pointer;border:1px solid transparent;
  transition:transform .16s ease,box-shadow .2s ease,background .2s;white-space:nowrap;line-height:1}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--grad-runway);color:#241300;box-shadow:0 12px 30px -10px rgba(255,150,60,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(255,150,60,.7)}
.btn-ghost{background:var(--panel);border-color:var(--brd-2);color:var(--ink)}
.btn-ghost:hover{background:var(--panel-2);transform:translateY(-2px);border-color:var(--brd-2)}
.btn-aurora{background:var(--grad-aurora);color:#05122a;box-shadow:0 12px 34px -12px rgba(126,123,255,.7)}
.btn-aurora:hover{transform:translateY(-2px)}
.btn-lg{padding:16px 30px;font-size:16.5px;border-radius:15px}
.btn-block{width:100%;justify-content:center}
.btn:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- chips / badges ---------- */
.chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.03em;padding:5px 10px;border-radius:8px;background:var(--panel);
  border:1px solid var(--brd);color:var(--ink-2)}
.chip.on{color:var(--good);border-color:rgba(79,230,166,.3);background:rgba(79,230,166,.08)}
.chip.hot{color:var(--amber);border-color:rgba(255,178,76,.3);background:rgba(255,178,76,.08)}
.chip.cy{color:var(--cyan);border-color:rgba(53,224,212,.3);background:rgba(53,224,212,.08)}
.tagrow{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- hero ---------- */
.hero{position:relative;padding-top:clamp(46px,7vw,84px);padding-bottom:clamp(40px,6vw,72px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;padding:7px 14px;border-radius:999px;
  background:var(--panel);border:1px solid var(--brd);font-family:var(--font-mono);font-size:12px;
  color:var(--ink-2);letter-spacing:.02em;margin-bottom:26px}
.hero-kicker b{color:var(--cyan);font-weight:600}
.dot-live{width:7px;height:7px;border-radius:50%;background:var(--good);box-shadow:0 0 0 0 rgba(79,230,166,.6);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(79,230,166,.55)}70%{box-shadow:0 0 0 8px rgba(79,230,166,0)}100%{box-shadow:0 0 0 0 rgba(79,230,166,0)}}
.hero h1{font-size:clamp(34px,6vw,62px);font-weight:700;letter-spacing:-.025em}
.hero h1 .grad-text{display:inline-block}
.hero .lead{color:var(--ink-2);font-size:clamp(16px,2vw,19px);margin-top:22px;max-width:44ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-metrics{display:flex;gap:30px;margin-top:40px;flex-wrap:wrap}
.metric b{font-family:var(--font-display);font-size:26px;font-weight:700;display:block;line-height:1}
.metric span{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}

/* signature: route map */
.routemap{position:relative;aspect-ratio:1/1;width:100%}
.routemap svg{width:100%;height:100%;overflow:visible}
.rm-glow{position:absolute;inset:8%;border-radius:50%;
  background:radial-gradient(circle,rgba(126,123,255,.28),transparent 62%);filter:blur(24px);z-index:-1}
.arc{fill:none;stroke-width:1.4;stroke-linecap:round}
.arc-dim{stroke:rgba(170,178,214,.22)}
.arc-live{stroke:url(#gline);stroke-dasharray:5 240;filter:drop-shadow(0 0 4px rgba(53,224,212,.8));
  animation:flow 3.4s linear infinite}
.arc-live.d2{animation-delay:1.1s}
.arc-live.d3{animation-delay:2.2s}
@keyframes flow{to{stroke-dashoffset:-245}}
.node{fill:#0b1130;stroke:var(--cyan);stroke-width:1.4}
.node-core{fill:var(--cyan)}
.node-hub{fill:url(#ghub);stroke:none}
.node-pulse{fill:none;stroke:var(--cyan);opacity:.6;transform-origin:center;animation:ring 3s ease-out infinite}
@keyframes ring{0%{r:6px;opacity:.7}100%{r:26px;opacity:0}}
.node-label{font-family:var(--font-mono);font-size:9px;fill:var(--ink-2);letter-spacing:.1em}
@media (prefers-reduced-motion:reduce){.arc-live,.node-pulse,.dot-live{animation:none}.arc-live{stroke-dasharray:none;opacity:.7}}

/* ---------- generic card ---------- */
.card{position:relative;background:var(--panel);border:1px solid var(--brd);border-radius:var(--radius);
  padding:26px;transition:transform .2s ease,border-color .2s,background .2s}
.card:hover{transform:translateY(-4px);border-color:var(--brd-2);background:var(--panel-2)}

/* ---------- leaderboard (airport ranking) ---------- */
.board{display:grid;gap:22px}
.rank{position:relative;display:grid;grid-template-columns:auto 1fr auto;gap:26px;align-items:center;
  padding:26px 28px;border-radius:var(--radius-l);border:1px solid var(--brd);
  background:linear-gradient(120deg,rgba(255,255,255,.05),rgba(255,255,255,.02));overflow:hidden}
.rank::before{content:"";position:absolute;inset:0;padding:1px;border-radius:inherit;pointer-events:none;
  background:var(--grad-aurora);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.25s}
.rank:hover::before{opacity:.55}
.rank:hover{transform:translateY(-3px)}
.gate{display:flex;flex-direction:column;align-items:center;justify-content:center;
  width:76px;height:76px;border-radius:16px;background:rgba(6,9,23,.6);border:1px solid var(--brd)}
.gate .no{font-family:var(--font-display);font-weight:700;font-size:30px;line-height:1;
  background:var(--grad-aurora);-webkit-background-clip:text;background-clip:text;color:transparent}
.gate .lb{font-family:var(--font-mono);font-size:8.5px;letter-spacing:.14em;color:var(--ink-3);text-transform:uppercase;margin-top:4px}
.rank-main h3{font-size:22px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rank-main .tagline{color:var(--ink-2);margin:8px 0 12px;font-size:14.5px}
.rank-side{display:flex;flex-direction:column;gap:9px;align-items:stretch;min-width:150px}
.rank-side .price{font-family:var(--font-mono);text-align:right;font-size:13px;color:var(--ink-2)}
.rank-side .price b{font-family:var(--font-display);font-size:22px;color:var(--ink);display:block}
.best{position:absolute;top:0;right:0;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;padding:5px 12px;border-bottom-left-radius:12px;background:var(--grad-runway);color:#241300;font-weight:600}

/* ---------- feature grid ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.ficon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(53,224,212,.1);border:1px solid rgba(53,224,212,.25);color:var(--cyan)}
.ficon svg{width:22px;height:22px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--ink-2);font-size:14.5px}

/* ---------- decision helper ---------- */
.pick{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pick-card{display:block;padding:24px;border-radius:var(--radius);border:1px solid var(--brd);
  background:var(--panel);transition:.2s}
.pick-card:hover{transform:translateY(-4px);border-color:var(--brd-2);background:var(--panel-2)}
.pick-card .q{font-family:var(--font-mono);font-size:12px;color:var(--cyan);letter-spacing:.06em;margin-bottom:10px}
.pick-card h3{font-size:19px;margin-bottom:6px}
.pick-card .rec{margin-top:14px;display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--amber)}

/* ---------- comparison table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--brd);border-radius:var(--radius);background:var(--panel)}
table.cmp{width:100%;border-collapse:collapse;min-width:640px;font-size:14.5px}
table.cmp th,table.cmp td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--brd)}
table.cmp thead th{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-3);background:rgba(255,255,255,.02)}
table.cmp tbody tr:last-child td{border-bottom:none}
table.cmp tbody tr:hover{background:rgba(255,255,255,.02)}
table.cmp .name{font-family:var(--font-display);font-weight:600;color:var(--ink)}
table.cmp td.mono{font-family:var(--font-mono);color:var(--ink-2)}

/* ---------- article (detail pages) ---------- */
.crumbs{display:flex;gap:8px;flex-wrap:wrap;font-family:var(--font-mono);font-size:12.5px;color:var(--ink-3);margin-bottom:20px}
.crumbs a:hover{color:var(--cyan)}
.crumbs span{color:var(--ink-3)}
.hero-detail{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:start}
.spec{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--brd);border:1px solid var(--brd);border-radius:var(--radius);overflow:hidden}
.spec div{background:var(--bg-1);padding:16px 18px}
.spec dt{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-bottom:6px}
.spec dd{margin:0;font-weight:600;font-size:15px}
.prose{max-width:760px}
.prose h2{font-size:clamp(24px,3.4vw,32px);margin:52px 0 16px;scroll-margin-top:88px}
.prose h3{font-size:20px;margin:30px 0 12px}
.prose p{color:var(--ink-2);margin:14px 0;font-size:16px}
.prose ul.dots{margin:16px 0;display:grid;gap:11px}
.prose ul.dots li{position:relative;padding-left:26px;color:var(--ink-2)}
.prose ul.dots li::before{content:"";position:absolute;left:4px;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--grad-aurora)}
.prose strong{color:var(--ink);font-weight:600}
.prose a.inline{color:var(--cyan);border-bottom:1px solid rgba(53,224,212,.35)}
.callout{border:1px solid var(--brd);border-left:3px solid var(--amber);background:rgba(255,178,76,.06);
  border-radius:12px;padding:16px 20px;margin:22px 0;color:var(--ink-2);font-size:14.5px}
.callout b{color:var(--amber)}

/* pros / cons */
.pc{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:22px 0}
.pc .col{padding:22px;border-radius:var(--radius);border:1px solid var(--brd)}
.pc .pros{background:rgba(79,230,166,.05);border-color:rgba(79,230,166,.22)}
.pc .cons{background:rgba(255,106,213,.05);border-color:rgba(255,106,213,.2)}
.pc h4{font-family:var(--font-display);font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.pc li{position:relative;padding-left:24px;margin:9px 0;color:var(--ink-2);font-size:14.5px}
.pc .pros li::before{content:"✓";position:absolute;left:0;color:var(--good);font-weight:700}
.pc .cons li::before{content:"!";position:absolute;left:2px;color:var(--magenta);font-weight:700}

/* pricing table */
.plan-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.plan-table th,.plan-table td{padding:13px 16px;border-bottom:1px solid var(--brd);text-align:left}
.plan-table thead th{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.plan-table td.p{font-family:var(--font-mono);color:var(--amber);font-weight:600}

/* sticky buy box */
.buybox{position:sticky;top:88px;border:1px solid var(--brd);border-radius:var(--radius-l);
  background:linear-gradient(150deg,rgba(255,255,255,.06),rgba(255,255,255,.02));padding:26px;box-shadow:var(--shadow)}
.buybox .price-lead{font-family:var(--font-mono);font-size:12px;color:var(--ink-3);letter-spacing:.06em}
.buybox .price-big{font-family:var(--font-display);font-weight:700;font-size:34px;margin:4px 0 2px}
.buybox .price-big span{font-size:15px;color:var(--ink-3);font-weight:500}
.codebox{display:flex;align-items:center;gap:10px;margin-top:16px;padding:10px 14px;border-radius:11px;
  border:1px dashed var(--brd-2);background:rgba(6,9,23,.5)}
.codebox code{font-family:var(--font-mono);color:var(--amber);font-size:14px;letter-spacing:.04em;flex:1}
.copybtn{background:var(--panel);border:1px solid var(--brd);color:var(--ink-2);border-radius:8px;
  padding:6px 11px;font-size:12px;cursor:pointer;font-family:var(--font-mono);transition:.15s}
.copybtn:hover{color:var(--cyan);border-color:var(--brd-2)}

/* toc */
.toc{position:sticky;top:88px;font-size:14px}
.toc .lb{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:14px}
.toc a{display:block;padding:7px 0 7px 16px;color:var(--ink-2);border-left:2px solid var(--brd);transition:.15s}
.toc a:hover{color:var(--cyan);border-color:var(--cyan)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:820px}
.faq details{border:1px solid var(--brd);border-radius:14px;background:var(--panel);overflow:hidden;transition:.2s}
.faq details[open]{border-color:var(--brd-2);background:var(--panel-2)}
.faq summary{cursor:pointer;list-style:none;padding:18px 22px;font-family:var(--font-display);font-weight:600;
  font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--cyan);transition:.2s;font-weight:400}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 22px 20px;color:var(--ink-2);font-size:14.5px}

/* ---------- CTA band ---------- */
.band{position:relative;border-radius:var(--radius-l);overflow:hidden;padding:clamp(40px,6vw,68px);text-align:center;
  border:1px solid var(--brd-2);background:linear-gradient(130deg,rgba(53,224,212,.12),rgba(126,123,255,.12),rgba(255,106,213,.12))}
.band h2{font-size:clamp(26px,4vw,40px)}
.band p{color:var(--ink-2);margin:14px auto 28px;max-width:52ch}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--brd);padding:56px 0 40px;margin-top:20px;color:var(--ink-3);font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;margin-bottom:36px}
.foot h5{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:16px}
.foot a{display:block;color:var(--ink-2);padding:5px 0;transition:.15s}
.foot a:hover{color:var(--cyan)}
.foot .disc{border-top:1px solid var(--brd);padding-top:22px;line-height:1.7;font-size:12.5px;color:var(--ink-3)}
.foot .disc b{color:var(--ink-2)}

/* ---------- utilities ---------- */
.hr{height:1px;background:var(--brd);border:none;margin:0}
.mt-s{margin-top:14px}.mt{margin-top:26px}.mt-l{margin-top:44px}
.muted{color:var(--ink-3)}
.nowrap{white-space:nowrap}

/* ---------- doc layout (detail pages: toc + prose) ---------- */
.doc{display:grid;grid-template-columns:210px minmax(0,1fr);gap:clamp(28px,5vw,60px);align-items:start}
.emb{border-radius:16px;flex:none}
.steps{counter-reset:s;display:grid;gap:14px;margin:18px 0}
.steps li{position:relative;padding:16px 18px 16px 60px;border:1px solid var(--brd);border-radius:14px;background:var(--panel);color:var(--ink-2)}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:16px;top:14px;width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;font-family:var(--font-mono);font-weight:600;font-size:14px;color:#05122a;background:var(--grad-aurora)}
.steps li b{color:var(--ink)}
.verdict{border:1px solid var(--brd);border-left:3px solid var(--cyan);background:rgba(53,224,212,.06);
  border-radius:12px;padding:16px 20px;color:var(--ink);font-size:15.5px;line-height:1.7}
.air-card small{font-family:var(--font-mono);font-size:11px;color:var(--ink-3);font-weight:400;letter-spacing:.04em}
@media (max-width:940px){.doc{grid-template-columns:1fr}.doc .toc{display:none}}

/* ---------- responsive ---------- */
@media (max-width:940px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .routemap{max-width:460px;margin-inline:auto;order:-1}
  .hero-detail{grid-template-columns:1fr}
  .buybox,.toc{position:static}
  .grid-3,.pick{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav-links{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;padding:14px 20px 22px;
    background:rgba(6,9,23,.97);backdrop-filter:blur(16px);border-bottom:1px solid var(--brd);
    transform:translateY(-140%);transition:transform .28s ease;margin-left:0}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:13px 12px;font-size:16px}
  .nav-cta{margin:8px 0 0}
  .nav-toggle{display:flex}
  .grid-3,.grid-2,.pick,.pc,.spec,.foot-grid{grid-template-columns:1fr}
  .rank{grid-template-columns:auto 1fr;gap:16px;padding:20px}
  .rank-side{grid-column:1/-1;min-width:0}
  .rank-side .price{text-align:left}
  .hero-metrics{gap:22px}
}

.nav-links a.btn-primary{color:#241300}
.nav-links a.btn-aurora{color:#05122a}
.nav-links a.btn-ghost{color:var(--ink)}

/* ---------- 机场墙 marquee ---------- */
.wall{overflow:hidden;padding:10px 0;-webkit-mask:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);mask:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent)}
.wall-track{display:flex;gap:12px;width:max-content;animation:marq 72s linear infinite}
.wall-track.rev{animation-direction:reverse;margin-top:12px}
.wall:hover .wall-track{animation-play-state:paused}
@keyframes marq{to{transform:translateX(-50%)}}
.wall-chip{display:inline-flex;align-items:center;gap:9px;padding:7px 15px 7px 7px;border-radius:999px;border:1px solid var(--brd);background:var(--panel);white-space:nowrap;transition:.18s;color:var(--ink)}
.wall-chip:hover{border-color:var(--brd-2);background:var(--panel-2);transform:translateY(-2px)}
.wall-chip svg{width:26px;height:26px;flex:none}
.wall-chip span{font-family:var(--font-display);font-weight:600;font-size:14px}
@media (prefers-reduced-motion:reduce){.wall-track{animation:none;flex-wrap:wrap;width:auto;justify-content:center}.wall{-webkit-mask:none;mask:none}}