/* =========================================================
   Taiyuan Trade — site styles
   Palette: deep teal identity drawn from the brand mark
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --ink:        #0D211B;
  --ink-soft:   #4C6058;
  --paper:      #FFFFFF;
  --mist:       #F3F8F6;
  --line:       #DCE8E3;
  --teal:       #1C6F5A;
  --teal-deep:  #12463A;
  --teal-bright:#2E9C7C;
  --gold:       #C79A4B;
  --danger:     #B4432E;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(13,33,27,0.04), 0 12px 32px -16px rgba(13,33,27,0.18);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

a{color:inherit;}
img{max-width:100%; display:block;}

.wrap{
  max-width:1120px;
  margin:0 auto;
  padding:0 28px;
}

/* ---------- Header / nav ---------- */
header.site{
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,0.9);
  position:sticky; top:0; z-index:40;
  backdrop-filter:blur(6px);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 28px;
  max-width:1120px;
  margin:0 auto;
}
.brand{
  display:flex; align-items:center; gap:10px;
  text-decoration:none;
  font-family:var(--font-display);
  font-weight:700;
  font-size:19px;
  color:var(--ink);
  letter-spacing:-0.01em;
}
.brand img{height:43px; width:auto;}
.navlinks{
  display:flex; gap:30px; list-style:none; margin:0; padding:0;
  font-size:14.5px; font-weight:500;
}
.navlinks a{text-decoration:none; color:var(--ink-soft); transition:color .15s;}
.navlinks a:hover, .navlinks a.active{color:var(--teal);}
.nav-cta{
  display:inline-flex; align-items:center; gap:8px;
  background:var(--teal);
  color:#fff;
  font-weight:600;
  font-size:14px;
  padding:10px 18px;
  border-radius:999px;
  text-decoration:none;
  transition:background .15s, transform .15s;
}
.nav-cta:hover{background:var(--teal-deep); transform:translateY(-1px);}
.nav-toggle{display:none;}

@media (max-width: 780px){
  .navlinks{display:none;}
  .nav-toggle{
    display:inline-flex; background:none; border:1px solid var(--line);
    border-radius:8px; padding:8px 10px; cursor:pointer;
  }
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--font-body); font-weight:600; font-size:15px;
  padding:14px 26px; border-radius:999px; border:none; cursor:pointer;
  text-decoration:none; transition:transform .15s, background .15s, box-shadow .15s;
}
.btn-primary{background:var(--teal); color:#fff;}
.btn-primary:hover{background:var(--teal-deep); transform:translateY(-1px);}
.btn-primary:disabled{background:#9FB8B0; cursor:not-allowed; transform:none;}
.btn-ghost{background:transparent; color:var(--teal-deep); border:1.5px solid var(--line);}
.btn-ghost:hover{border-color:var(--teal); color:var(--teal);}
.btn-block{width:100%;}

/* ---------- Hero ---------- */
.hero{
  padding:88px 0 64px;
  position:relative;
  overflow:hidden;
}
.hero .wrap{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:56px;
  align-items:center;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:0.06em;
  color:var(--teal-deep); background:var(--mist);
  border:1px solid var(--line);
  padding:6px 12px; border-radius:999px;
  margin-bottom:22px;
  text-transform:uppercase;
}
.eyebrow .dot{width:6px; height:6px; border-radius:50%; background:var(--teal-bright);}
h1.display{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(36px, 5vw, 58px);
  line-height:1.04;
  letter-spacing:-0.02em;
  margin:0 0 22px;
  color:var(--ink);
}
h1.display em{
  font-style:normal;
  color:var(--teal);
  position:relative;
}
.hero p.lead{
  font-size:18px; line-height:1.6; color:var(--ink-soft);
  max-width:46ch; margin:0 0 32px;
}
.hero-actions{display:flex; gap:14px; flex-wrap:wrap;}

.hero-visual{
  position:relative;
}
.rate-ticker{
  background:var(--mist);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  font-family:var(--font-mono);
}
.rate-ticker .row{
  display:flex; justify-content:space-between; align-items:center;
  padding:10px 0; border-bottom:1px dashed var(--line);
  font-size:14px;
}
.rate-ticker .row:last-child{border-bottom:none;}
.rate-ticker .pair{color:var(--ink-soft);}
.rate-ticker .val{font-weight:600; color:var(--teal-deep);}
.rate-ticker .up{color:var(--teal-bright);}
.rate-ticker .down{color:var(--danger);}

/* ---------- Sections ---------- */
section{padding:72px 0;}
.section-head{max-width:640px; margin:0 0 44px;}
.section-head .eyebrow{margin-bottom:16px;}
h2.display{
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(28px, 3.4vw, 38px);
  letter-spacing:-0.015em;
  margin:0 0 14px;
}
.section-head p{color:var(--ink-soft); font-size:16.5px; line-height:1.6;}

.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.grid-2{display:grid; grid-template-columns:1fr 1fr; gap:24px;}
@media (max-width:860px){
  .grid-3, .grid-2{grid-template-columns:1fr;}
  .hero .wrap{grid-template-columns:1fr;}
}

.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
}
.card .icon{
  width:42px; height:42px; border-radius:10px;
  background:var(--mist); color:var(--teal);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px;
}
.card h3{font-family:var(--font-display); font-size:18px; margin:0 0 10px;}
.card p{color:var(--ink-soft); font-size:14.5px; line-height:1.6; margin:0;}

.coin-strip{
  display:flex; flex-wrap:wrap; gap:12px;
  padding:20px 0;
}
.coin-chip{
  display:flex; align-items:center; gap:8px;
  background:var(--mist); border:1px solid var(--line);
  padding:9px 14px; border-radius:999px;
  font-family:var(--font-mono); font-size:13px; font-weight:500;
  color:var(--teal-deep);
}
.coin-dot{width:8px; height:8px; border-radius:50%;}

/* ---------- Footer ---------- */
footer.site{
  background:var(--teal-deep);
  color:#CFE6DD;
  padding:56px 0 28px;
  margin-top:40px;
}
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px;
  margin-bottom:36px;
}
.footer-brand{display:flex; align-items:center; gap:10px; margin-bottom:14px;}
.footer-brand img{height:26px;}
.footer-brand span{font-family:var(--font-display); font-weight:700; color:#fff; font-size:17px;}
footer.site p{font-size:13.5px; line-height:1.6; color:#A9CABD; max-width:34ch;}
footer.site h4{font-size:13px; text-transform:uppercase; letter-spacing:0.06em; color:#8FB6A7; margin:0 0 14px;}
footer.site ul{list-style:none; margin:0; padding:0;}
footer.site li{margin-bottom:10px;}
footer.site a{color:#D9EDE4; text-decoration:none; font-size:14px;}
footer.site a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.12);
  padding-top:22px;
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap:10px;
  font-size:12.5px; color:#8FB6A7;
  font-family:var(--font-mono);
}
@media (max-width:780px){.footer-grid{grid-template-columns:1fr 1fr;}}

/* ---------- Page header (inner pages) ---------- */
.page-head{
  padding:56px 0 36px;
  border-bottom:1px solid var(--line);
  background:var(--mist);
}
.page-head h1{
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(30px,4vw,42px); margin:0 0 10px; letter-spacing:-0.02em;
}
.page-head p{color:var(--ink-soft); font-size:16px; max-width:60ch;}

/* ================= Exchange calculator ================= */
.calc-shell{
  max-width:560px; margin:0 auto;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow);
  padding:8px;
}
.calc-panel{
  background:var(--mist);
  border-radius:16px;
  padding:22px;
  margin-bottom:8px;
}
.calc-panel:last-of-type{margin-bottom:0;}
.calc-label{
  font-family:var(--font-mono); font-size:12px; text-transform:uppercase;
  letter-spacing:0.06em; color:var(--ink-soft); margin-bottom:10px; display:block;
}
.calc-row{display:flex; align-items:center; gap:12px;}
.calc-amount{
  flex:1; border:none; background:transparent;
  font-family:var(--font-display); font-size:30px; font-weight:600;
  color:var(--ink); outline:none; width:100%; min-width:0;
}
.calc-amount::placeholder{color:#B7C7C0;}
.calc-select{
  display:flex; align-items:center; gap:8px;
  background:var(--paper); border:1px solid var(--line);
  padding:9px 14px; border-radius:999px;
  font-weight:600; font-size:14.5px; cursor:pointer;
  appearance:none; -webkit-appearance:none;
  font-family:var(--font-body);
}
.calc-swap{
  display:flex; justify-content:center; margin:-14px 0; position:relative; z-index:2;
}
.calc-swap button{
  width:38px; height:38px; border-radius:50%;
  background:var(--paper); border:1px solid var(--line);
  color:var(--teal); font-size:16px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; box-shadow:var(--shadow);
}
.calc-meta{
  display:flex; justify-content:space-between;
  font-size:13px; color:var(--ink-soft);
  padding:16px 22px 4px;
  font-family:var(--font-mono);
}
.calc-cta{padding:18px 14px 14px;}
.calc-fineprint{
  text-align:center; font-size:12px; color:var(--ink-soft);
  padding:0 22px 18px;
}
.rate-status{
  display:inline-flex; align-items:center; gap:6px;
  font-size:12px; font-family:var(--font-mono);
}
.rate-status .led{width:7px; height:7px; border-radius:50%; background:var(--teal-bright);}
.rate-status.fallback .led{background:var(--gold);}

/* ================= Order / payment pages ================= */
.order-card{
  max-width:560px; margin:40px auto;
  border:1px solid var(--line); border-radius:18px;
  overflow:hidden; box-shadow:var(--shadow);
}
.order-status{
  background:var(--mist); padding:26px 28px; text-align:center;
  border-bottom:1px solid var(--line);
}
.order-status .check{
  width:52px; height:52px; border-radius:50%;
  background:var(--teal); color:#fff;
  display:flex; align-items:center; justify-content:center;
  margin:0 auto 14px; font-size:24px;
}
.order-status h2{font-family:var(--font-display); margin:0 0 6px; font-size:22px;}
.order-status p{color:var(--ink-soft); font-size:14px; margin:0;}
.order-body{padding:26px 28px;}
.order-line{
  display:flex; justify-content:space-between; align-items:baseline;
  padding:12px 0; border-bottom:1px solid var(--line);
  font-size:14.5px;
}
.order-line:last-child{border-bottom:none;}
.order-line .k{color:var(--ink-soft);}
.order-line .v{font-weight:600; font-family:var(--font-mono);}
.order-actions{padding:8px 28px 28px; display:flex; gap:12px;}

.pay-field{
  background:var(--mist); border:1px solid var(--line); border-radius:12px;
  padding:14px 16px; margin-bottom:12px;
  display:flex; justify-content:space-between; align-items:center; gap:10px;
}
.pay-field .k{font-size:12px; text-transform:uppercase; letter-spacing:0.05em; color:var(--ink-soft); font-family:var(--font-mono); display:block; margin-bottom:4px;}
.pay-field .v{font-family:var(--font-mono); font-size:15px; font-weight:600; word-break:break-all;}
.copy-btn{
  flex-shrink:0; border:1px solid var(--line); background:var(--paper);
  border-radius:8px; padding:6px 10px; font-size:12px; cursor:pointer; font-weight:600;
  color:var(--teal-deep);
}
.copy-btn:hover{border-color:var(--teal);}

/* ================= Static content pages ================= */
.prose{max-width:760px; margin:0 auto; padding:48px 0 80px;}
.prose h2{font-family:var(--font-display); font-size:22px; margin:36px 0 12px;}
.prose h2:first-child{margin-top:0;}
.prose p, .prose li{color:var(--ink-soft); font-size:15.5px; line-height:1.75;}
.prose ul{padding-left:20px;}

.faq-item{
  border-bottom:1px solid var(--line); padding:20px 0;
}
.faq-item summary{
  font-family:var(--font-display); font-weight:600; font-size:16.5px;
  cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:'+'; font-size:22px; color:var(--teal); font-weight:400;}
.faq-item[open] summary::after{content:'–';}
.faq-item p{margin:12px 0 0; color:var(--ink-soft); font-size:14.5px; line-height:1.7;}

.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:start;}
@media (max-width:780px){.contact-grid{grid-template-columns:1fr;}}
.field{margin-bottom:16px;}
.field label{display:block; font-size:13px; font-weight:600; margin-bottom:6px; color:var(--ink-soft);}
.field input, .field textarea{
  width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:10px;
  font-family:var(--font-body); font-size:14.5px; background:var(--mist);
}
.field textarea{resize:vertical; min-height:110px;}


/* ================= Partner page ================= */
.partner-hero{
  padding:88px 0 72px;
  background:
    radial-gradient(circle at 88% 18%, rgba(46,156,124,0.13), transparent 32%),
    linear-gradient(180deg, #FFFFFF 0%, var(--mist) 100%);
  border-bottom:1px solid var(--line);
}
.partner-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.18fr) minmax(300px,0.82fr);
  gap:56px;
  align-items:center;
}
.partner-hero p.lead{
  font-size:18px;
  line-height:1.65;
  color:var(--ink-soft);
  max-width:58ch;
  margin:0 0 32px;
}
.partner-highlight{
  background:var(--teal-deep);
  color:#fff;
  border-radius:22px;
  padding:36px;
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.partner-highlight::after{
  content:'';
  position:absolute;
  width:180px;
  height:180px;
  border:1px solid rgba(255,255,255,0.14);
  border-radius:50%;
  right:-72px;
  bottom:-88px;
}
.partner-highlight-label{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:0.08em;
  color:#8FD0BB;
  margin-bottom:16px;
}
.partner-highlight p{
  margin:0;
  font-family:var(--font-display);
  font-size:24px;
  line-height:1.45;
  letter-spacing:-0.01em;
  position:relative;
  z-index:1;
}
.partner-section-head{max-width:760px;}
.partner-services .icon{
  width:auto;
  min-width:42px;
  padding:0 10px;
  font-family:var(--font-mono);
  font-size:12px;
}
.partner-gallery-section{
  background:var(--mist);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.screenshot-grid{
  display:grid;
  grid-template-columns:repeat(3,280px);
  gap:24px;
  align-items:start;
  justify-content:center;
}
.screenshot-placeholder{
  width:280px;
  aspect-ratio:828 / 1792;
  border:1.5px dashed #B7CCC4;
  border-radius:24px;
  background:rgba(255,255,255,0.58);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  color:#8BA49A;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.06em;
  text-transform:uppercase;
}
.screenshot-placeholder img{
  width:100%;
  height:100%;
  display:block;
  object-fit:cover;
  border-radius:inherit;
}
.partner-cta-section{padding:72px 0 32px;}
.partner-cta-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:22px;
  box-shadow:var(--shadow);
  padding:42px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:40px;
}
.partner-cta-card h2.display{max-width:640px;}
.partner-cta-card p{
  color:var(--ink-soft);
  font-size:16px;
  line-height:1.7;
  margin:0;
  max-width:720px;
}
.partner-cta-card .btn{flex-shrink:0;}

@media (max-width:980px){
  .navlinks{gap:20px; font-size:14px;}
  .partner-hero-grid{grid-template-columns:1fr;}
  .partner-highlight{max-width:700px;}
  .screenshot-grid{grid-template-columns:repeat(2,280px);}
  .partner-cta-card{align-items:flex-start; flex-direction:column;}
}

@media (max-width:780px){
  .partner-hero{padding:64px 0 52px;}
  .partner-highlight{padding:28px;}
  .partner-highlight p{font-size:20px;}
  .screenshot-grid{grid-template-columns:repeat(2,minmax(0,280px)); gap:16px;}
  .screenshot-placeholder{width:100%;}
  .partner-cta-card{padding:28px;}
}
@media (max-width:620px){
  .screenshot-grid{grid-template-columns:minmax(0,280px);}
  .screenshot-placeholder{width:100%;}
}

/* ---------- Mobile Navigation ---------- */
.nav-actions{display:flex; align-items:center; gap:10px;}
@media (max-width:780px){
  .nav{position:relative;}
  .nav-toggle{
    align-items:center;
    justify-content:center;
    width:40px;
    height:40px;
    padding:0;
    font-size:20px;
    line-height:1;
    color:var(--teal-deep);
  }
  .nav.menu-open .navlinks{
    display:flex;
    position:absolute;
    top:calc(100% + 1px);
    left:20px;
    right:20px;
    flex-direction:column;
    gap:0;
    padding:10px;
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:12px;
    box-shadow:var(--shadow);
  }
  .nav.menu-open .navlinks a{
    display:block;
    padding:12px 14px;
    border-radius:8px;
  }
  .nav.menu-open .navlinks a:hover,
  .nav.menu-open .navlinks a.active{background:var(--mist);}
}
@media (max-width:560px){
  .nav{padding:12px 18px;}
  .brand img{height:44px;}
  .nav-cta{display:none;}
  .nav.menu-open .navlinks{left:14px; right:14px;}
}