/* ==========================================================================
   2CN.com — shared stylesheet
   Used by every page (home / guide / cities, all 4 languages).
   Language-specific typography is handled with html[lang="..."] overrides,
   so a single file styles all 12 pages. No external fonts, no framework.
   ========================================================================== */

:root{
  --red:#B3282D; --red-dark:#8F1F23; --ink:#1F2328; --ink-soft:#57606A;
  --line:#E4E2DC; --bg:#FDFCFA; --bg-soft:#F6F4EF; --card:#FFFFFF;
  --radius:14px; --maxw:1080px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
     background:var(--bg);color:var(--ink);line-height:1.65;font-size:16.5px}
html[lang="zh-Hans"] body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,"Helvetica Neue",Arial,sans-serif;line-height:1.75;font-size:16px}
html[lang="ja"] body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Meiryo",Roboto,"Helvetica Neue",Arial,sans-serif;line-height:1.8;font-size:16px}
html[lang="ko"] body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",Roboto,"Helvetica Neue",Arial,sans-serif;line-height:1.75;font-size:16px}
a{color:var(--red);text-decoration:none;border-bottom:1px solid rgba(179,40,45,.35)}
a:hover{color:var(--red-dark);border-bottom-color:var(--red-dark)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
img{max-width:100%}

/* ---------- nav ---------- */
nav{position:sticky;top:0;z-index:50;background:rgba(253,252,250,.92);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.nav-in{position:relative;max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.logo{font-weight:800;font-size:20px;letter-spacing:-.5px;color:var(--ink);border:none}
.logo b{color:var(--red)}
.logo-img{height:34px;width:auto;display:block}
.nav-links{display:flex;gap:18px;flex-wrap:wrap;margin-left:auto;font-size:14.5px}
.nav-links a{color:var(--ink-soft);border:none}
.nav-links a:hover{color:var(--red)}
.nav-links a.cur{color:var(--red);font-weight:700}
/* language menu — one dropdown instead of four loose links.
   Uses native <details> so it still works with JavaScript disabled.
   The panel is anchored to .nav-in (which is position:relative), not to the
   button, so it always opens flush with the right edge of the header. */
.lang{padding-left:16px;border-left:1px solid var(--line)}
details.lang-dd{margin:0;background:none;border:none;border-radius:0;overflow:visible;position:static}
details.lang-dd>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:650;color:var(--ink-soft);padding:6px 11px;border:1px solid var(--line);
  border-radius:9px;background:var(--card);white-space:nowrap;user-select:none;position:static}
details.lang-dd>summary::-webkit-details-marker{display:none}
/* the site-wide <details> accordion adds a "+/–" marker via ::after; kill it
   here for both states (equal specificity otherwise, so [open] must be named) */
details.lang-dd>summary::after,details.lang-dd[open]>summary::after{content:none}
details.lang-dd>summary:hover,details.lang-dd[open]>summary{color:var(--red);border-color:var(--red)}
.caret{width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translate(-2px,-2px);transition:transform .18s}
details.lang-dd[open] .caret{transform:rotate(-135deg) translate(-1px,-1px)}
.lang-list{position:absolute;right:24px;top:100%;z-index:60;min-width:172px;list-style:none;margin-top:6px;
  background:var(--card);border:1px solid var(--line);border-radius:12px;padding:6px;
  box-shadow:0 14px 34px rgba(31,35,40,.14)}
.lang-list a{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:9px 13px;
  border-radius:8px;border:none;color:var(--ink);font-size:14.5px;line-height:1.4}
.lang-list a:hover{background:var(--bg-soft);color:var(--red)}
.lang-list a.cur{color:var(--red);font-weight:700}
.lang-list a.cur::after{content:"✓";font-size:12px}

/* ---------- hero (home) ---------- */
header.hero{padding:84px 0 56px;background:var(--bg-soft);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.hero .big{position:absolute;right:-30px;top:-70px;font-size:340px;font-weight:800;color:rgba(179,40,45,.055);line-height:1;user-select:none;pointer-events:none;letter-spacing:-18px}
.kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2.5px;text-transform:uppercase;color:var(--red);margin-bottom:18px}
h1{font-size:clamp(34px,5.4vw,58px);line-height:1.08;letter-spacing:-1.5px;font-weight:800;max-width:640px}
html[lang="zh-Hans"] h1{font-size:clamp(32px,5vw,54px);line-height:1.15;letter-spacing:-.5px}
html[lang="ja"] h1,html[lang="ko"] h1{font-size:clamp(30px,4.8vw,52px);line-height:1.18;letter-spacing:-.5px}
h1 em{font-style:normal;color:var(--red)}
.sub{margin-top:20px;font-size:19px;color:var(--ink-soft);max-width:600px}
html[lang="zh-Hans"] .sub{font-size:18.5px}
html[lang="ja"] .sub,html[lang="ko"] .sub{font-size:18px}
.cta-row{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 24px;border-radius:10px;font-weight:600;font-size:15.5px;border:none;cursor:pointer;font-family:inherit}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-dark);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink-soft)}

/* ---------- stat bar ---------- */
.stats{margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;max-width:860px}
.stat{background:var(--card);padding:18px 22px}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--red);letter-spacing:-.5px}
.stat span{font-size:13px;color:var(--ink-soft)}

/* ---------- sub-page hero ---------- */
header.sub-hero{padding:64px 0 44px;background:var(--bg-soft);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
header.sub-hero h1{max-width:820px}
.crumb{font-size:13.5px;color:var(--ink-soft);margin-bottom:16px}
.crumb a{border:none;color:var(--ink-soft)}
.crumb a:hover{color:var(--red)}
.meta{margin-top:22px;font-size:13.5px;color:var(--ink-soft)}

/* ---------- sections ---------- */
section{padding:72px 0;border-bottom:1px solid var(--line)}
section.tight{padding:52px 0}
.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:14px}
.sec-num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:700;color:var(--red);font-size:15px}
h2{font-size:clamp(24px,3vw,32px);letter-spacing:-.6px;font-weight:800}
html[lang="zh-Hans"] h2{letter-spacing:-.4px}
.sec-sub{color:var(--ink-soft);max-width:640px;margin-bottom:34px}
h3{letter-spacing:-.2px}

/* ---------- toc ---------- */
.toc{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}
.toc a{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:14.5px;font-weight:650;color:var(--ink)}
.toc a:hover{border-color:var(--red);color:var(--red)}
.toc a span{display:block;font-size:12px;font-weight:400;color:var(--ink-soft);margin-top:3px}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-soft)}
.card p+p{margin-top:9px}
.card .tag{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--red);background:rgba(179,40,45,.08);padding:3px 9px;border-radius:99px;margin-bottom:12px}

/* ---------- steps ---------- */
.steps{counter-reset:step;display:grid;gap:14px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px 22px 62px;position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:22px;top:22px;width:24px;height:24px;border-radius:50%;background:var(--red);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1}
.step h3{font-size:16px;margin-bottom:6px}
.step p{font-size:14.5px;color:var(--ink-soft)}
.step p+p{margin-top:8px}

/* ---------- callout ---------- */
.callout{border-left:3px solid var(--red);background:rgba(179,40,45,.05);border-radius:0 12px 12px 0;padding:16px 20px;font-size:14.5px;margin:18px 0}
.callout.warn{border-left-color:#C9821A;background:rgba(201,130,26,.09)}
.callout p+p{margin-top:8px}

/* ---------- checklist ---------- */
.checks{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:11px 28px}
.checks li{position:relative;padding-left:26px;font-size:14.5px;color:var(--ink-soft)}
.checks li::before{content:"✓";position:absolute;left:0;top:0;color:var(--red);font-weight:700}
.checks li b{color:var(--ink);font-weight:650}

/* ---------- definition list ---------- */
.kv{display:grid;grid-template-columns:auto 1fr;gap:12px 24px;font-size:14.5px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.kv dt{font-weight:650;white-space:nowrap}
.kv dd{color:var(--ink-soft)}

/* ---------- table ---------- */
table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:14.5px}
thead{background:var(--bg-soft)}
th,td{text-align:left;padding:13px 18px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:13px;text-transform:uppercase;letter-spacing:1px;color:var(--ink-soft);font-weight:700}
tr:last-child td{border-bottom:none}
td b{font-weight:650}

/* ---------- details / faq ---------- */
details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
summary{cursor:pointer;padding:17px 22px;font-weight:650;font-size:15.5px;list-style:none;position:relative;padding-right:44px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--red);font-weight:400}
details[open] summary::after{content:"–"}
details .body{padding:0 22px 20px;font-size:15px;color:var(--ink-soft)}
details .body p+p{margin-top:10px}

/* ---------- cities ---------- */
.cities{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.city{border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;background:var(--card);transition:border-color .15s}
.city:hover{border-color:var(--red)}
.city b{display:block;font-size:17px;margin-bottom:4px}
.city span{font-size:13.5px;color:var(--ink-soft)}

/* ---------- city blocks (cities page) ---------- */
.city-block{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px;margin-bottom:18px;scroll-margin-top:96px}
.city-block h3{font-size:22px;font-weight:800;letter-spacing:-.4px;margin-bottom:6px}
.city-block .lede{font-size:15px;color:var(--ink-soft);margin-bottom:18px}
.city-block h4{font-size:13px;text-transform:uppercase;letter-spacing:1.2px;color:var(--red);margin:20px 0 10px;font-weight:700}
.city-block p{font-size:14.5px;color:var(--ink-soft)}
.city-block p+p{margin-top:8px}
.days{list-style:none;display:grid;gap:8px;font-size:14.5px;color:var(--ink-soft)}
.days li{padding-left:52px;position:relative}
.days li b{position:absolute;left:0;top:0;color:var(--ink);font-weight:650}
.city-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 22px;font-size:14px;color:var(--ink-soft);margin-top:6px}
.city-facts b{color:var(--ink);font-weight:650}

/* ---------- forms ---------- */
.form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;max-width:660px}
.form-card.wide{max-width:100%}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:650;margin-bottom:6px}
input[type=text],input[type=email],select,textarea{width:100%;font-family:inherit;font-size:14.5px;padding:11px 14px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--red)}
textarea{min-height:120px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.sub-row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-start}
.sub-row input{flex:1;min-width:220px}
.form-msg{margin-top:12px;font-size:14px;color:var(--ink-soft)}
.form-msg.ok{color:#1F7A44;font-weight:650}
.form-msg.err{color:var(--red);font-weight:650}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.form-note{font-size:12.5px;color:var(--ink-soft);margin-top:10px}

/* ---------- sources ---------- */
.src-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px;font-size:15px}
.src-grid li{margin-bottom:12px;color:var(--ink-soft)}
.src-grid b{color:var(--ink);font-weight:650}

/* ---------- footer ---------- */
footer{background:#201314;color:#E8DCDC;padding:56px 0 44px;font-size:14px}
footer .wrap{display:flex;gap:40px;flex-wrap:wrap;justify-content:space-between}
footer a{color:#F0B9BB;border:none}
footer a:hover{color:#fff}
.disc{max-width:640px;color:#C8B4B5}
.foot-brand{font-weight:800;font-size:18px;color:#fff;letter-spacing:-.3px}
.foot-brand b{color:#F0B9BB}
.foot-nav{margin-top:14px;display:flex;gap:16px;flex-wrap:wrap}
.foot-nav a{color:#C8B4B5}

@media (max-width:820px){
  .cards,.cards.two,.cities,.toc,.city-facts{grid-template-columns:1fr}
  .checks,.form-row{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .src-grid{grid-template-columns:1fr}
  .hero{padding:60px 0 44px}
  .hero .big{font-size:200px;top:-40px}
  .logo-img{height:28px}
  header.sub-hero{padding:44px 0 32px}
  .city-block{padding:22px 20px}
  section{padding:52px 0}
  .lang{padding-left:0;border-left:none}
}