/* ============================================
   chemicalheritage.org — USDT娱乐城品牌站
   配色：暗金/黑/翠绿（赌场奢华感+加密货币科技感）
   字体：Cinzel（标题装饰感）+ Inter（正文清晰）
   装饰：金色线条分割 + 光泽渐变 + 卡片镶嵌感
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700;900&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg-deep: #08070a;
  --bg-body: #0c0b10;
  --bg-card: #111016;
  --bg-card-2: #16141e;
  --bg-card-3: #1b1925;
  --gold: #c9a84c;
  --gold-light: #e8d084;
  --gold-dark: #8a7130;
  --green: #24b47e;
  --green-dark: #1a8a5e;
  --green-glow: rgba(36,180,126,.2);
  --red: #e84855;
  --line: rgba(201,168,76,.12);
  --line-strong: rgba(201,168,76,.25);
  --text: #eae6db;
  --muted: #948f82;
  --shadow: 0 24px 64px rgba(0,0,0,.5);
  --radius: 12px;
  --radius-lg: 20px;
  --maxw: 1240px;
  --font-display: 'Cinzel', 'Georgia', serif;
  --font-body: 'Inter', -apple-system, sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  background: var(--bg-body);
  background-image:
    radial-gradient(ellipse at 20% 10%, rgba(201,168,76,.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(36,180,126,.04) 0%, transparent 40%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-body) 40%, var(--bg-deep) 100%);
  line-height:1.7;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0 0 0 20px}
h1,h2,h3,h4,p{margin:0}
table{width:100%;border-collapse:collapse}

::selection{background:rgba(201,168,76,.3);color:#fff}

/* --- Scrollbar --- */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:var(--gold-dark);border-radius:4px}

/* --- Utility --- */
.container{width:min(calc(100% - 32px), var(--maxw));margin:0 auto;position:relative;z-index:1}
.section{padding:64px 0;position:relative}
.section-head{text-align:center;margin-bottom:40px}
.section-head .tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);margin-bottom:14px;
}
.section-head .tag::before,
.section-head .tag::after{
  content:"";display:block;width:32px;height:1px;
  background:linear-gradient(90deg, transparent, var(--gold), transparent);
}
.section-head h2{
  font-family:var(--font-display);
  font-size:34px;font-weight:700;letter-spacing:.06em;
}
.section-head p{color:var(--muted);font-size:15px;max-width:600px;margin:10px auto 0}

/* --- Grid Pattern Overlay --- */
.grid-overlay{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(201,168,76,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,168,76,.03) 1px, transparent 1px);
  background-size:60px 60px;
}

/* --- Header --- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(8,7,10,.88);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  min-height:72px;gap:20px;
}
.logo{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-display);
}
.logo-mark{
  width:44px;height:44px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg, var(--gold-dark), var(--gold));
  color:var(--bg-deep);
  font-size:20px;font-weight:900;
  box-shadow:0 0 20px rgba(201,168,76,.2);
}
.logo-text{
  display:flex;flex-direction:column;
}
.logo-text strong{
  font-size:18px;font-weight:700;letter-spacing:.06em;
  background:linear-gradient(135deg, var(--gold-light), var(--gold));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.logo-text span{font-size:10px;color:var(--muted);letter-spacing:.15em;text-transform:uppercase;margin-top:-2px}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  padding:8px 16px;font-size:14px;border-radius:8px;
  color:var(--muted);transition:all .2s;
  position:relative;
}
.nav a:hover,.nav a.active{color:var(--gold);background:rgba(201,168,76,.08)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:transparent;
  color:var(--text);flex-direction:column;align-items:center;
  justify-content:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;background:currentColor;border-radius:2px;transition:all .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* --- Hero --- */
.hero{
  padding:0;position:relative;overflow:hidden;
  min-height:560px;display:flex;align-items:center;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(201,168,76,.12), transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(36,180,126,.08), transparent 40%),
    linear-gradient(135deg, #0c0b10 0%, #111016 50%, #08070a 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(201,168,76,.02) 2px, rgba(201,168,76,.02) 3px);
}
.hero-particles{
  position:absolute;inset:0;z-index:0;overflow:hidden;
}
.hero-particles span{
  position:absolute;width:4px;height:4px;
  background:var(--gold);border-radius:50%;
  opacity:0;box-shadow:0 0 6px rgba(201,168,76,.4);
  animation:particleFloat 6s infinite;
}
.hero-particles span:nth-child(1){left:10%;top:20%;animation-delay:0s}
.hero-particles span:nth-child(2){left:25%;top:60%;animation-delay:1.2s;width:2px;height:2px}
.hero-particles span:nth-child(3){left:45%;top:30%;animation-delay:2.4s;width:6px;height:6px}
.hero-particles span:nth-child(4){left:65%;top:70%;animation-delay:0.8s}
.hero-particles span:nth-child(5){left:80%;top:25%;animation-delay:3.6s;width:3px;height:3px}
.hero-particles span:nth-child(6){left:90%;top:55%;animation-delay:1.8s}
.hero-particles span:nth-child(7){left:35%;top:80%;animation-delay:4.2s}
.hero-particles span:nth-child(8){left:55%;top:15%;animation-delay:2s;width:2px;height:2px}
@keyframes particleFloat{
  0%{opacity:0;transform:translateY(20px)}
  30%{opacity:.6}
  70%{opacity:.3}
  100%{opacity:0;transform:translateY(-40px)}
}

.hero-lines{
  position:absolute;inset:0;z-index:0;pointer-events:none;
}
.hero-lines::before,.hero-lines::after{
  content:"";position:absolute;
  left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity:.15;
}
.hero-lines::before{top:20%}
.hero-lines::after{bottom:30%}

.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1fr 1fr;
  gap:40px;align-items:center;padding:60px 0;
}
.hero-text{display:flex;flex-direction:column;gap:18px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;border-radius:4px;
  background:rgba(36,180,126,.12);
  border:1px solid rgba(36,180,126,.2);
  font-size:12px;font-weight:600;color:var(--green);
  width:fit-content;letter-spacing:.08em;
  font-family:var(--font-display);
}
.hero-text h1{
  font-family:var(--font-display);
  font-size:46px;font-weight:700;line-height:1.15;
  letter-spacing:.04em;
}
.hero-text h1 em{
  font-style:normal;
  background:linear-gradient(135deg, var(--gold-light), var(--gold), var(--gold-dark));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-text p{font-size:16px;color:var(--muted);max-width:500px;line-height:1.8}
.hero-actions{display:flex;gap:14px;margin-top:10px;flex-wrap:wrap}

.hero-visual{
  position:relative;display:flex;justify-content:center;align-items:center;
}
.hero-visual-inner{
  position:relative;width:380px;height:380px;
  border-radius:50%;overflow:hidden;
  border:2px solid var(--line-strong);
  box-shadow:0 0 60px rgba(201,168,76,.1), inset 0 0 60px rgba(201,168,76,.05);
  display:grid;place-items:center;
}
.hero-visual-inner img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.hero-ring{
  position:absolute;inset:-20px;border-radius:50%;
  border:1px solid rgba(201,168,76,.15);
  animation:ringRotate 20s linear infinite;
}
.hero-ring-2{
  position:absolute;inset:-40px;border-radius:50%;
  border:1px dashed rgba(201,168,76,.1);
  animation:ringRotate 30s linear infinite reverse;
}
@keyframes ringRotate{to{transform:rotate(360deg)}}

/* --- Buttons --- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 32px;border-radius:6px;
  font-family:var(--font-body);
  font-size:15px;font-weight:600;
  cursor:pointer;transition:all .25s ease;
  border:none;letter-spacing:.03em;
}
.btn-gold{
  background:linear-gradient(135deg, var(--gold-dark), var(--gold), var(--gold-light));
  color:var(--bg-deep);box-shadow:0 4px 24px rgba(201,168,76,.25);
}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(201,168,76,.4)}
.btn-outline{
  background:transparent;border:1px solid var(--line-strong);
  color:var(--text);
}
.btn-outline:hover{border-color:var(--gold);color:var(--gold);background:rgba(201,168,76,.06)}
.btn-green{
  background:linear-gradient(135deg, var(--green-dark), var(--green));
  color:#fff;box-shadow:0 4px 20px rgba(36,180,126,.25);
}
.btn-green:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(36,180,126,.4)}
.btn-lg{padding:16px 36px;font-size:16px}

/* --- Feature Cards --- */
.feature-grid{
  display:grid;grid-template-columns:repeat(auto-fill, minmax(260px, 1fr));
  gap:20px;
}
.feature-card{
  padding:32px 28px;border-radius:var(--radius-lg);
  background:var(--bg-card);
  border:1px solid var(--line);
  position:relative;overflow:hidden;
  transition:all .3s ease;
}
.feature-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
  opacity:0;transition:opacity .3s;
}
.feature-card:hover::before{opacity:1}
.feature-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.feature-card .icon{font-size:40px;margin-bottom:12px}
.feature-card h3{font-family:var(--font-display);font-size:17px;margin-bottom:8px;letter-spacing:.04em}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.7}

/* --- Game Grid (覆盖game-list/item) --- */
.game-grid{
  display:grid;grid-template-columns:repeat(auto-fill, minmax(200px, 1fr));
  gap:16px;
}
.game-card{
  padding:28px 20px;border-radius:var(--radius-lg);
  background:var(--bg-card-2);
  border:1px solid var(--line);text-align:center;
  transition:all .25s ease;position:relative;
}
.game-card:hover{transform:translateY(-3px);border-color:var(--gold);background:var(--bg-card-3)}
.game-card .icon{font-size:44px;margin-bottom:10px}
.game-card h3{font-size:15px;font-weight:600;margin-bottom:6px}
.game-card .tag{
  display:inline-block;padding:2px 10px;border-radius:3px;
  font-size:11px;font-weight:600;margin-top:4px;
}
.game-card .tag.popular{background:rgba(36,180,126,.15);color:var(--green)}
.game-card .tag.hot{background:rgba(232,72,85,.15);color:var(--red)}
.game-card .tag.new{background:rgba(201,168,76,.15);color:var(--gold)}
.game-card .tag.rec{background:rgba(201,168,76,.12);color:var(--gold-light)}
.tag-top-right{
  position:absolute;top:-8px;right:12px;
  padding:3px 12px;border-radius:3px;
  font-size:10px;font-weight:700;text-transform:uppercase;
  letter-spacing:.08em;font-family:var(--font-display);
}
.tag-top-right.hot{background:var(--red);color:#fff}
.tag-top-right.popular{background:var(--green);color:#fff}
.tag-top-right.gold{background:linear-gradient(135deg,var(--gold-dark),var(--gold));color:var(--bg-deep)}

/* --- Promo Strip --- */
.promo-strip{
  display:grid;grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:16px;
}
.promo-card{
  display:flex;align-items:center;gap:16px;
  padding:20px 24px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--bg-card);
  transition:all .25s;
}
.promo-card:hover{border-color:var(--gold);background:var(--bg-card-2)}
.promo-icon{font-size:38px;flex-shrink:0}
.promo-card h3{font-size:15px;margin-bottom:4px}
.promo-card p{font-size:13px;color:var(--muted)}

/* --- VIP Tiers --- */
.vip-grid{
  display:grid;grid-template-columns:repeat(auto-fill, minmax(220px, 1fr));
  gap:16px;
}
.vip-card{
  padding:28px 20px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg, var(--bg-card), var(--bg-card-2));
  border:1px solid var(--line);text-align:center;
  position:relative;overflow:hidden;
}
.vip-card::after{
  content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;
  background:conic-gradient(from 0deg, transparent, rgba(201,168,76,.05), transparent, rgba(201,168,76,.05), transparent);
  animation:vipGlow 6s linear infinite;opacity:0;transition:opacity .5s;
}
.vip-card:hover::after{opacity:1}
@keyframes vipGlow{to{transform:rotate(360deg)}}
.vip-card .level{font-family:var(--font-display);font-size:28px;font-weight:700;letter-spacing:.1em}
.vip-card .level.gold{background:linear-gradient(135deg,var(--gold-dark),var(--gold-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.vip-card .level.platinum{color:#b5b5b5}
.vip-card .level.diamond{color:#7dd3fc}
.vip-card .level.ultimate{color:var(--green)}
.vip-card .bonus{font-size:32px;font-weight:700;margin:10px 0 4px;color:var(--gold-light)}
.vip-card .bonus small{font-size:14px;font-weight:400;color:var(--muted)}
.vip-card p{font-size:13px;color:var(--muted)}

/* --- Table (bonus/comp) --- */
.rate-table{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;
}
.rate-table th,.rate-table td{
  padding:14px 18px;text-align:left;
  border-bottom:1px solid var(--line);font-size:14px;
}
.rate-table th{
  background:var(--bg-card-2);
  font-family:var(--font-display);
  font-weight:600;letter-spacing:.06em;
  color:var(--gold);font-size:13px;
}
.rate-table td{color:var(--muted)}
.rate-table tr:last-child td{border-bottom:none}
.rate-table tr:hover td{background:rgba(201,168,76,.03)}
.rate-table .highlight{color:var(--gold-light);font-weight:600}

/* --- Steps --- */
.steps-grid{
  display:grid;grid-template-columns:repeat(auto-fill, minmax(240px, 1fr));
  gap:20px;counter-reset:step;
}
.step-card{
  padding:28px 24px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:var(--bg-card);
  position:relative;
}
.step-card::before{
  counter-increment:step;
  content:counter(step);
  position:absolute;top:-12px;right:20px;
  font-family:var(--font-display);
  font-size:48px;font-weight:900;
  color:rgba(201,168,76,.08);line-height:1;
}
.step-card .icon{font-size:32px;margin-bottom:10px}
.step-card h3{font-size:16px;margin-bottom:6px}
.step-card p{font-size:14px;color:var(--muted)}

/* --- Testimonials --- */
.testimonial-grid{
  display:grid;grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:20px;
}
.testimonial-card{
  padding:28px;border-radius:var(--radius-lg);
  background:var(--bg-card);border:1px solid var(--line);
  display:flex;flex-direction:column;gap:12px;
}
.testimonial-card .stars{color:var(--gold);font-size:16px;letter-spacing:2px}
.testimonial-card q{font-size:14px;color:var(--muted);font-style:italic;line-height:1.7}
.testimonial-card cite{font-size:13px;color:var(--text);font-style:normal;display:flex;align-items:center;gap:8px}
.testimonial-card cite::before{content:"";width:24px;height:1px;background:var(--gold)}

/* --- FAQ --- */
.faq-list{display:flex;flex-direction:column;gap:8px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg-card);overflow:hidden;
}
.faq-q{
  padding:16px 20px;display:flex;align-items:center;
  justify-content:space-between;cursor:pointer;
  font-size:15px;font-weight:500;
  transition:background .2s;
}
.faq-q:hover{background:rgba(201,168,76,.04)}
.faq-q .arrow{font-size:12px;color:var(--gold);transition:transform .3s}
.faq-q.open .arrow{transform:rotate(180deg)}
.faq-a{
  padding:0 20px;max-height:0;overflow:hidden;
  transition:max-height .3s ease, padding .3s ease;
  font-size:14px;color:var(--muted);line-height:1.7;
}
.faq-a.open{max-height:300px;padding:0 20px 16px}

/* --- Quick Links --- */
.quick-links{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.quick-link{
  padding:10px 20px;border-radius:6px;
  border:1px solid var(--line);background:var(--bg-card);
  font-size:14px;transition:all .2s;color:var(--muted);
}
.quick-link:hover{border-color:var(--gold);color:var(--gold);background:rgba(201,168,76,.06)}

/* --- CTA --- */
.cta-section{
  text-align:center;padding:80px 20px;
  position:relative;overflow:hidden;
}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at center, rgba(201,168,76,.08), transparent 60%);
}
.cta-section h2{font-family:var(--font-display);font-size:38px;margin-bottom:10px}
.cta-section p{font-size:16px;color:var(--muted);margin-bottom:24px}

/* --- Footer --- */
.site-footer{
  border-top:1px solid var(--line);
  padding:40px 0;margin-top:20px;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;
  gap:30px;
}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:10px;max-width:320px}
.footer-col h3{
  font-family:var(--font-display);
  font-size:13px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--gold);margin-bottom:14px;
}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:4px 0;transition:color .2s}
.footer-col a:hover{color:var(--text)}
.footer-bottom{
  border-top:1px solid var(--line);margin-top:28px;padding-top:20px;
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--muted);
}
.footer-contacts{display:flex;gap:20px}
.footer-contacts span{display:flex;align-items:center;gap:6px}

/* --- Matomo (hidden iframe) --- */
.matomo-track{display:none}

/* --- Mobile --- */
@media (max-width: 860px){
  .nav{display:none;position:fixed;top:72px;left:0;right:0;flex-direction:column;
       background:rgba(8,7,10,.97);backdrop-filter:blur(20px);
       border-bottom:1px solid var(--line);z-index:999;padding:8px 0;}
  .nav.open{display:flex}
  .nav a{padding:14px 24px;font-size:16px;border-bottom:1px solid var(--line);color:var(--muted)}
  .nav a:last-child{border-bottom:none}
  .nav a:hover{background:rgba(201,168,76,.06)}
  .nav-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;text-align:center;padding:40px 0}
  .hero-text h1{font-size:32px}
  .hero-text p{margin:0 auto}
  .hero-actions{justify-content:center}
  .hero-visual-inner{width:240px;height:240px}
  .hero-ring,.hero-ring-2{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:20px}
  .footer-bottom{flex-direction:column;gap:10px;text-align:center}
  .footer-contacts{flex-wrap:wrap;justify-content:center}
}

@media (max-width: 480px){
  .hero-text h1{font-size:26px}
  .section-head h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr}
  .feature-grid,.game-grid,.promo-strip{grid-template-columns:1fr}
}