/* ChinaHappens — shared static styles
   Design system aligned with the iOS app. No framework, no build. */

:root{
  --persimmon:#EF5A2A;
  --persimmon-press:#D8481D;
  --persimmon-tint:#FFE9E0;
  --jade:#149E8C;
  --gold:#C8A02E;

  --bg:#FBF7F2;
  --card:#FFFFFF;
  --hairline:#ECE4DA;
  --ink:#1A1410;
  --ink-2:#6B625A;
  --ink-3:#9B928A;

  --shadow-sm:0 1px 3px rgba(26,20,16,.06);
  --shadow:0 6px 22px rgba(26,20,16,.07), 0 2px 6px rgba(26,20,16,.04);
  --shadow-lg:0 18px 48px rgba(26,20,16,.12);

  --radius:18px;
  --radius-lg:26px;
  --maxw:1080px;

  --sans:"General Sans","Clash Display",system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#141117;
    --card:#1E1A21;
    --hairline:#2C2733;
    --ink:#F4EFEA;
    --ink-2:#B4ABA3;
    --ink-3:#877E77;
    --persimmon-tint:#3A2015;
    --shadow-sm:0 1px 3px rgba(0,0,0,.4);
    --shadow:0 6px 22px rgba(0,0,0,.5);
    --shadow-lg:0 18px 48px rgba(0,0,0,.6);
  }
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--persimmon);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--sans);color:var(--ink);letter-spacing:-0.02em;line-height:1.08;font-weight:600;margin:0}
p{margin:0 0 1em}
::selection{background:var(--persimmon-tint);color:var(--ink)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:720px}

/* ---------- Header ---------- */
.site-head{
  position:sticky;top:0;z-index:20;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:saturate(140%) blur(14px);
  -webkit-backdrop-filter:saturate(140%) blur(14px);
  border-bottom:1px solid var(--hairline);
}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--sans);font-weight:600;font-size:19px;letter-spacing:-0.02em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:30px;height:30px;flex:none}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--ink-2);font-size:15px;font-weight:500}
.nav a:hover{color:var(--ink);text-decoration:none}
@media (max-width:640px){ .nav{gap:16px} .nav a{font-size:14px} }

/* ---------- Hero ---------- */
.hero{padding:88px 0 40px}
.hero h1{font-size:clamp(38px,6.4vw,74px);max-width:15ch}
.hero .accent{color:var(--persimmon)}
.hero .sub{font-size:clamp(18px,2.4vw,22px);color:var(--ink-2);max-width:46ch;margin:22px 0 34px;line-height:1.5}
.hero .badge-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero .noacct{font-size:14px;color:var(--ink-3)}

/* App Store badge — keep clear space, do not recolor/restyle */
.appstore-badge{display:inline-block;line-height:0}
.appstore-badge svg{height:52px;width:auto;display:block}
.appstore-badge:hover{text-decoration:none;opacity:.9}

/* ---------- Section ---------- */
section{scroll-margin-top:78px}
.section{padding:56px 0}
.eyebrow{font-family:var(--body);font-weight:600;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--persimmon);margin-bottom:14px}
.section h2{font-size:clamp(28px,4vw,42px);max-width:20ch}
.section .lede{font-size:19px;color:var(--ink-2);max-width:52ch;margin-top:14px}

/* ---------- Feature blocks ---------- */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
@media (max-width:860px){ .features{grid-template-columns:1fr} }
.feature{
  background:var(--card);border:1px solid var(--hairline);border-radius:var(--radius-lg);
  padding:30px 28px;box-shadow:var(--shadow);
}
.feature .num{font-family:var(--sans);font-weight:600;font-size:14px;color:var(--persimmon);letter-spacing:.04em}
.feature h3{font-size:23px;margin:14px 0 10px}
.feature p{font-size:15.5px;color:var(--ink-2);margin:0}
.feature ul{margin:14px 0 0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:7px}
.feature li{font-size:12.5px;font-weight:500;color:var(--ink-2);background:var(--bg);border:1px solid var(--hairline);border-radius:8px;padding:4px 10px}
.note{font-size:13px;color:var(--ink-3);margin-top:16px;padding-top:14px;border-top:1px solid var(--hairline);line-height:1.5}

/* ---------- City grid ---------- */
.cities{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
@media (max-width:860px){ .cities{grid-template-columns:repeat(2,1fr)} }
@media (max-width:520px){ .cities{grid-template-columns:1fr} }
.city{
  position:relative;display:block;border-radius:var(--radius);overflow:hidden;border:1px solid var(--hairline);
  background:var(--card);box-shadow:var(--shadow-sm);color:var(--ink);
  transition:box-shadow .18s ease, transform .18s ease;
}
a.city:hover{text-decoration:none;box-shadow:var(--shadow);transform:translateY(-2px)}
.city .cover{
  aspect-ratio:4/3;
  background-color:#E9D9C9;
  background-image:repeating-linear-gradient(135deg, rgba(26,20,16,.05) 0 2px, transparent 2px 11px);
  display:flex;align-items:center;justify-content:center;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11.5px;color:var(--ink-3);
  border-bottom:1px solid var(--hairline);
}
.city:nth-child(2n) .cover{background-color:#D9E3D2}
.city:nth-child(3n) .cover{background-color:#E3D6E0}
.city:nth-child(4n) .cover{background-color:#BFE6E1}
.city .meta{display:flex;align-items:center;justify-content:space-between;padding:14px 16px}
.city .name{font-family:var(--sans);font-weight:600;font-size:18px}
.city .name span{display:block;font-family:var(--body);font-weight:400;font-size:13px;color:var(--ink-3);margin-top:1px}
.tag{font-size:11.5px;font-weight:600;border-radius:7px;padding:4px 9px;letter-spacing:.02em}
.tag.free{color:var(--jade);background:color-mix(in srgb,var(--jade) 12%,transparent)}
.tag.pack{color:var(--ink-2);background:var(--bg);border:1px solid var(--hairline)}

/* ---------- Languages ---------- */
.langs{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.langs span{font-size:15px;color:var(--ink);background:var(--card);border:1px solid var(--hairline);border-radius:999px;padding:8px 16px}

/* ---------- Footer ---------- */
.site-foot{border-top:1px solid var(--hairline);margin-top:40px;padding:36px 0 54px}
.site-foot .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.site-foot .links{display:flex;flex-wrap:wrap;gap:22px}
.site-foot a{color:var(--ink-2);font-size:14px;font-weight:500}
.site-foot a:hover{color:var(--ink);text-decoration:none}
.site-foot .copy{font-size:13.5px;color:var(--ink-3)}

/* ---------- Legal / long-form ---------- */
.legal{padding:44px 0 30px}
.legal .updated{font-size:13.5px;color:var(--ink-3);margin-bottom:8px}
.legal h1{font-size:clamp(30px,4.4vw,46px);margin-bottom:10px}
.legal .intro{font-size:18px;color:var(--ink-2);max-width:60ch}
.toc{
  background:var(--card);border:1px solid var(--hairline);border-radius:var(--radius);
  padding:20px 24px;margin:30px 0 8px;
}
.toc h2{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px;font-family:var(--body);font-weight:600}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:32px}
@media (max-width:560px){ .toc ol{columns:1} }
.toc li{margin:5px 0}
.toc a{color:var(--ink-2);font-size:15px}
.prose{max-width:66ch}
.prose h2{font-size:24px;margin:44px 0 12px}
.prose h3{font-size:18px;margin:26px 0 8px}
.prose p,.prose li{font-size:16.5px;color:var(--ink-2);line-height:1.68}
.prose ul{padding-left:22px;margin:0 0 1em}
.prose li{margin:6px 0}
.prose strong{color:var(--ink);font-weight:600}
.prose a{font-weight:500}
.callout{
  background:var(--persimmon-tint);border-radius:14px;padding:16px 20px;margin:22px 0;
  font-size:15px;color:var(--ink);border:1px solid color-mix(in srgb,var(--persimmon) 20%,transparent);
}

/* ---------- FAQ ---------- */
.faq{margin-top:8px}
.faq details{
  background:var(--card);border:1px solid var(--hairline);border-radius:14px;
  padding:0 22px;margin:12px 0;box-shadow:var(--shadow-sm);
}
.faq summary{
  cursor:pointer;list-style:none;padding:20px 0;
  font-family:var(--sans);font-weight:600;font-size:18px;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--body);font-weight:400;font-size:24px;color:var(--ink-3);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details[open] summary{padding-bottom:6px}
.faq .answer{padding:0 0 22px}
.faq .answer p{font-size:16px;color:var(--ink-2);margin:0 0 .7em}
.faq .answer p:last-child{margin-bottom:0}

.contact-card{
  background:var(--card);border:1px solid var(--hairline);border-radius:var(--radius);
  padding:26px 28px;box-shadow:var(--shadow);margin:26px 0;
}
.contact-card h3{font-size:20px;margin-bottom:8px}
.contact-card p{font-size:15.5px;color:var(--ink-2);margin:0 0 .5em}
.contact-card .email{font-family:var(--sans);font-weight:600;font-size:22px}

/* ---------- 404 ---------- */
.nf{min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 24px}
.nf h1{font-size:clamp(54px,12vw,120px);color:var(--persimmon)}
.nf p{font-size:19px;color:var(--ink-2);margin:12px 0 26px}
.btn{display:inline-block;background:var(--persimmon);color:#fff;font-weight:600;font-size:16px;border-radius:12px;padding:13px 26px}
.btn:hover{background:var(--persimmon-press);text-decoration:none}