/* styles.css - Jinghaitai Style B (Global Corporate) */
:root{
  /* Palette (Coolors) */
  --c-ice: #E7ECEF;
  --c-navy: #274C77;
  --c-steel: #6096BA;
  --c-sky: #A3CEF1;
  --c-ash: #8B8C89;

  --bg: #ffffff;
  --text: #111827;
  --muted: #4b5563;

  --max: 1120px;
  --pad: 24px;
  --radius: 16px;
  --line: rgba(39, 76, 119, 0.18);
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 3px; }

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.skip{
  position:absolute; left:-999px; top:auto;
  width:1px; height:1px; overflow:hidden;
}
.skip:focus{
  left: var(--pad); top: var(--pad);
  width:auto; height:auto; overflow:visible;
  background:#fff; border:1px solid var(--line);
  padding:8px 10px; border-radius:10px;
  z-index: 9999;
}

/* NAV */
.nav{
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height: 72px;
  gap: 16px;
}
.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  color: var(--c-navy);
  font-weight: 750;
  letter-spacing: 0.2px;
}
.brand img{
  height: 34px;
  width: auto;
  display:block;
}
.menu{
  display:flex;
  align-items:center;
  gap: 18px;
  flex-wrap: wrap;
}
.menu a{
  font-size: 14px;
  color: var(--c-navy);
  padding: 10px 6px;
  border-radius: 999px;
}
.menu a.active{
  text-decoration: underline;
  text-underline-offset: 6px;
}
.menu a.cta{
  border: 1px solid rgba(39, 76, 119, 0.45);
  background: linear-gradient(180deg, rgba(163, 206, 241, 0.28), rgba(231, 236, 239, 0.1));
  padding: 10px 14px;
}
.menu a.cta:hover{
  text-decoration: none;
  border-color: rgba(39, 76, 119, 0.75);
}

/* HERO (Home) */
.hero{
  background:
    radial-gradient(1200px 600px at 20% 10%, rgba(163, 206, 241, 0.35), rgba(163, 206, 241, 0.0)),
    linear-gradient(180deg, var(--c-navy), #1f3f63);
  color: #fff;
  padding: 92px 0 66px 0;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 34px;
  align-items: start;
}
.hero h1{
  margin: 0 0 14px 0;
  font-size: 42px;
  line-height: 1.15;
  font-weight: 760;
}
.hero .lead{
  margin: 0 0 12px 0;
  font-size: 18px;
  color: rgba(255,255,255,0.90);
  max-width: 70ch;
}
.hero .meta{
  margin: 0;
  font-size: 14px;
  color: rgba(255,255,255,0.72);
}
.hero .quick-links{
  margin-top: 22px;
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  border: 1px solid rgba(231, 236, 239, 0.28);
  background: rgba(231, 236, 239, 0.10);
  color: rgba(255,255,255,0.92);
  padding: 10px 12px;
  border-radius: 999px;
  font-size: 13px;
}
.pill:hover{
  text-decoration:none;
  border-color: rgba(231, 236, 239, 0.45);
  background: rgba(231, 236, 239, 0.14);
}

.hero-media{
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid rgba(231, 236, 239, 0.20);
  background: rgba(231, 236, 239, 0.06);
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
}
.hero-media img{
  width: 100%;
  height: 360px;
  object-fit: cover;
  display:block;
  opacity: 0.94;
}

/* Page hero (inner pages) */
.page-hero{
  background: linear-gradient(180deg, rgba(231,236,239,0.85), rgba(231,236,239,0.35));
  border-bottom: 1px solid var(--line);
  padding: 56px 0;
}
.page-hero h1{
  margin: 0 0 8px 0;
  font-size: 34px;
  line-height: 1.2;
  color: var(--c-navy);
  font-weight: 760;
}
.page-hero .subtitle{
  margin: 0 0 10px 0;
  color: var(--c-ash);
  font-size: 14px;
}
.page-hero p{
  margin: 0;
  color: var(--muted);
  max-width: 90ch;
}

/* Sections */
.section{ padding-top: 72px; }
.grid-2{
  display:grid;
  grid-template-columns: 0.34fr 0.66fr;
  gap: 46px;
  align-items:start;
}
.section h2{
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
  color: var(--c-navy);
  font-weight: 760;
}
.divider{
  width: 56px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-steel), rgba(96,150,186,0.25));
  margin: 12px 0 18px 0;
  border-radius: 2px;
}
.content p{
  margin: 0 0 12px 0;
  max-width: 85ch;
}
.content p:last-child{ margin-bottom: 0; }

.muted{ color: var(--c-ash); }
.note{
  background: rgba(231,236,239,0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px;
}

.cards-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.card{
  background: rgba(231,236,239,0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px;
}
.card .k{
  font-size: 12px;
  letter-spacing: 0.2px;
  color: rgba(255,255,255,0.85);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.card .k.dark{
  color: rgba(39, 76, 119, 0.85);
}
.card .v{
  font-size: 14px;
  color: var(--text);
}
.card strong{ color: var(--c-navy); }

.flow{
  display:grid;
  gap: 10px;
}
.step{
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  background: #fff;
}
.step .t{
  font-weight: 700;
  color: var(--c-navy);
  margin-bottom: 4px;
}
.step .d{
  color: var(--muted);
  font-size: 14px;
}

.split-2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(39,76,119,0.28);
  background: rgba(163,206,241,0.22);
  color: var(--c-navy);
  font-size: 13px;
}

/* Footer */
.footer{
  margin-top: 78px;
  border-top: 1px solid var(--line);
  padding: 26px 0 38px 0;
  color: var(--c-ash);
  font-size: 14px;
}
.footer .row{
  display:flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.footer a{ color: var(--c-navy); }

@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-media img{ height: 280px; }
  .cards-3{ grid-template-columns: 1fr; }
  .split-2{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; gap: 18px; }
  .hero h1{ font-size: 34px; }
}

@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior: auto !important; }
}

/* Exchange proof image */
.exchange-proof {
  margin: 32px 0 40px;
}

.exchange-proof img {
  max-width: 100%;
  height: auto;
  border: 1px solid #E7ECEF;
  border-radius: 4px;
  background: #FFFFFF;
}

.small {
  font-size: 13px;
}

.cards-3 .k{
  color:#6096BA;
  letter-spacing:0.12em;
}

/* Mobile menu toggle button (hidden on desktop) */
.menu-toggle{
  display:none;
  border:1px solid rgba(39, 76, 119, 0.35);
  background: rgba(231, 236, 239, 0.35);
  color: var(--c-navy);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
}

/* Mobile menu panel (hidden by default) */
.mobile-menu{
  display:none;
  position:absolute;
  left:0;
  right:0;
  top:100%;
  background: rgba(255,255,255,0.98);
  border-bottom: 1px solid var(--line);
  padding: 10px var(--pad) 14px;
}

.mobile-menu a{
  display:block;
  padding: 10px 0;
  color: var(--c-navy);
  text-decoration:none;
}

.mobile-menu a + a{
  border-top: 1px solid rgba(39, 76, 119, 0.12);
}

.mobile-menu.is-open{
  display:block;
}

/* Make header the positioning context for the dropdown */
.nav .nav-inner{
  position:relative;
}

/* Mobile behavior */
@media (max-width: 768px){
  .desktop-menu{
    display:none;
  }
  .menu-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
  }

  /* Slimmer bar on mobile */
  .nav-inner{
    min-height: 56px;
  }
  .brand img{
    height: 26px;
  }
}