/* ===== CoinGlass Website - Main Stylesheet ===== */
/* 配色：深色背景(#0d1117) + 科技蓝(#58a6ff) + 亮色强调(#f0b90b) + 白色 */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-blue: #58a6ff;
  --accent-blue-hover: #79b8ff;
  --accent-gold: #f0b90b;
  --accent-gold-hover: #f7c948;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-blue-hover); }

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== Header & Navigation ===== */
header {
  background-color: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  padding-bottom: 12px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo img { height: 36px; width: auto; border-radius: 6px; }

.logo span { background: linear-gradient(135deg, var(--accent-blue), var(--accent-gold)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

nav ul { display: flex; gap: 28px; align-items: center; }

nav ul li a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width var(--transition);
}

nav ul li a:hover, nav ul li a.active { color: var(--text-primary); }
nav ul li a:hover::after, nav ul li a.active::after { width: 100%; }

.nav-download-btn {
  background: linear-gradient(135deg, var(--accent-gold), #e6a800) !important;
  color: #0d1117 !important;
  padding: 8px 18px !important;
  border-radius: var(--radius);
  font-weight: 600 !important;
  transition: all var(--transition) !important;
}

.nav-download-btn::after { display: none !important; }
.nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(240, 185, 11, 0.35); color: #0d1117 !important; }

/* Mobile Menu */
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); margin: 5px 0; transition: var(--transition); }

/* ===== Hero Section ===== */
#hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(88, 166, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

#hero .container { position: relative; z-index: 1; }

#hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff, var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#hero .hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 36px;
}

#hero .hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold), #e6a800);
  color: #0d1117;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(240, 185, 11, 0.4); color: #0d1117; }

.btn-secondary {
  background: transparent;
  color: var(--accent-blue);
  border: 2px solid var(--accent-blue);
}

.btn-secondary:hover { background: rgba(88, 166, 255, 0.1); transform: translateY(-2px); }

.hero-image { margin-top: 50px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.4); }

/* ===== Features Section ===== */
#features {
  padding: 80px 0;
  background-color: var(--bg-secondary);
}

#features h2, #services-section h2, #faq-section h2, #contact-section h2 {
  text-align: center;
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 12px;
}

#features .section-desc, #services-section .section-desc {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
  font-size: 1.05rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.feature-card:hover { border-color: var(--accent-blue); transform: translateY(-4px); box-shadow: 0 8px 32px rgba(88, 166, 255, 0.12); }

.feature-card .feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.15), rgba(240, 185, 11, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
}

.feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.65; }

/* ===== Stats Section ===== */
#stats {
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  text-align: center;
}

.stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
}

.stat-card .stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card .stat-label { color: var(--text-secondary); font-size: 0.9rem; margin-top: 6px; }

/* ===== CTA Section ===== */
#cta {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.06), rgba(240, 185, 11, 0.04));
}

#cta h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 700; margin-bottom: 14px; }
#cta p { color: var(--text-secondary); margin-bottom: 28px; font-size: 1.05rem; max-width: 600px; margin-left: auto; margin-right: auto; }

/* ===== Page Banner (inner pages) ===== */
.page-banner {
  padding: 60px 0 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(88, 166, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  position: relative;
  z-index: 1;
}

.page-banner .breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 12px;
  position: relative;
  z-index: 1;
}

.page-banner .breadcrumb a { color: var(--text-secondary); }
.page-banner .breadcrumb a:hover { color: var(--accent-blue); }

/* ===== About Page ===== */
.about-content { padding: 40px 0 80px; }

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 60px;
}

.about-intro img { border-radius: var(--radius-lg); }

.about-intro h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 16px; }
.about-intro p { color: var(--text-secondary); margin-bottom: 12px; }

/* Timeline */
.timeline { margin: 60px 0; position: relative; padding-left: 40px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item { position: relative; margin-bottom: 36px; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -33px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--accent-blue);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-item .year {
  font-size: 0.85rem;
  color: var(--accent-blue);
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-item h3 { font-size: 1.15rem; font-weight: 600; }
.timeline-item p { color: var(--text-secondary); font-size: 0.92rem; }

/* Team Grid */
.team-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 24px; margin: 40px 0; }

.team-card { text-align: center; padding: 24px; background: var(--bg-tertiary); border-radius: var(--radius-lg); border: 1px solid var(--border-color); }

.team-card img { width: 100px; height: 100px; border-radius: 50%; margin: 0 auto 14px; object-fit: cover; }
.team-card h3 { font-size: 1.05rem; font-weight: 600; }
.team-card .role { color: var(--accent-blue); font-size: 0.85rem; margin: 4px 0 8px; }
.team-card p { color: var(--text-secondary); font-size: 0.85rem; }

/* Partners */
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; margin: 40px 0; }

.partner-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: var(--transition);
}

.partner-card:hover { border-color: var(--accent-blue); }

.partner-card img { height: 36px; width: auto; margin: 0 auto 8px; }
.partner-card span { font-size: 0.85rem; color: var(--text-secondary); }

/* ===== Services Page ===== */
.services-content { padding: 40px 0 80px; }

.service-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
}

.service-item:last-child { border-bottom: none; }

.service-item.reverse { direction: rtl; }
.service-item.reverse .service-text { direction: ltr; }

.service-text h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 14px; }
.service-text p { color: var(--text-secondary); margin-bottom: 10px; }
.service-text ul { margin: 12px 0; }
.service-text ul li { color: var(--text-secondary); padding: 4px 0; padding-left: 20px; position: relative; }
.service-text ul li::before { content: '>'; position: absolute; left: 0; color: var(--accent-blue); font-weight: 700; }

.service-image img { border-radius: var(--radius-lg); }

/* ===== FAQ Page ===== */
.faq-content { padding: 40px 0 80px; max-width: 860px; margin: 0 auto; }

.faq-category { margin-bottom: 48px; }

.faq-category h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
}

details {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
}

details summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  position: relative;
  padding-right: 40px;
  user-select: none;
  list-style: none;
}

details summary::-webkit-details-marker { display: none; }

details summary::after {
  content: '+';
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--accent-blue);
  transition: transform 0.3s;
}

details[open] summary::after { content: '−'; transform: translateY(-50%) rotate(180deg); }

details .faq-answer {
  padding: 0 20px 20px 20px;
  color: var(--text-secondary);
  line-height: 1.75;
}

details .faq-answer p { margin-bottom: 8px; }
details .faq-answer p:last-child { margin-bottom: 0; }

/* ===== Contact Page ===== */
.contact-content { padding: 40px 0 80px; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }

.contact-form { background: var(--bg-tertiary); padding: 36px; border-radius: var(--radius-lg); border: 1px solid var(--border-color); }

.contact-form h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 24px; }

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-submit { width: 100%; }

.contact-info h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 24px; }

.info-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
}

.info-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.info-card p { color: var(--text-secondary); font-size: 0.92rem; }

.social-links { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.social-link:hover { border-color: var(--accent-blue); color: var(--text-primary); }

/* ===== Footer ===== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
}

.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }

.footer-col h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 16px; }
.footer-col p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.65; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-col ul li a:hover { color: var(--accent-blue); }

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.btn-primary { animation: pulse 2s infinite; }
.btn-primary:hover { animation: none; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-intro { grid-template-columns: 1fr; }
  .service-item { grid-template-columns: 1fr; gap: 24px; }
  .service-item.reverse { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); padding: 16px 20px; }
  nav.active { display: block; }
  nav ul { flex-direction: column; gap: 12px; }
  .menu-toggle { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  #hero { padding: 50px 0 40px; }
  .hero-buttons { flex-direction: column; }
  .stats-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
}