/* ==========================================================================
   R8 Exchange (r8jiaoyisuo.com) - Modern Global Fintech Stylesheet
   Design System: Deep Dark Cyberpunk Crypto Terminal & Glassmorphism
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Color Tokens */
  --bg-dark: #07090e;
  --bg-card: #0e131f;
  --bg-card-hover: #141b2c;
  --bg-surface: #0a0e17;
  
  --cyan: #00f2fe;
  --blue: #4facfe;
  --purple: #7000ff;
  --green: #00e676;
  --red: #ff3366;
  
  --cyan-glow: rgba(0, 242, 254, 0.25);
  --blue-glow: rgba(79, 172, 254, 0.25);
  --purple-glow: rgba(112, 0, 255, 0.3);
  
  --text-main: #f3f4f6;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(0, 242, 254, 0.4);
  
  --gradient-brand: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #7000ff 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0) 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: #ffffff;
  font-weight: 700;
  line-height: 1.2;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.grid {
  display: grid;
  gap: 28px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Header & Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-link img {
  height: 42px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link.active::after, .nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--blue-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--blue-glow);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-subtle);
  color: #ffffff;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: rgba(0, 242, 254, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(0, 242, 254, 0.25);
}

/* Crypto Market Ticker Table */
.market-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  overflow: hidden;
}

.market-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.market-table th {
  padding: 18px 24px;
  background: rgba(255, 255, 255, 0.02);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-subtle);
}

.market-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 14.5px;
}

.market-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.coin-flex {
  display: flex;
  align-items: center;
  gap: 12px;
}

.coin-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
}

.coin-price {
  font-family: var(--font-mono);
  font-weight: 600;
}

.change-up { color: var(--green); font-family: var(--font-mono); font-weight: 600; }
.change-down { color: var(--red); font-family: var(--font-mono); font-weight: 600; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.35s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* Blog Cards */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.35s ease;
}

.blog-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.blog-card-img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.blog-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.blog-card:hover .blog-card-img {
  transform: scale(1.06);
}

.blog-card-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.blog-card-title {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 12px;
  color: #ffffff;
}

.blog-card-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.blog-read-more {
  margin-top: auto;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.blog-read-more:hover {
  color: #ffffff;
  gap: 10px;
}

/* Footer */
.site-footer {
  background: #05070a;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 30px 0;
  margin-top: 100px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

@media (max-width: 992px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 576px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13.5px;
  color: var(--text-dim);
}

.footer-legal-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-legal-links a:hover {
  color: #ffffff;
}

/* Article Typography */
.article-container {
  max-width: 860px;
  margin: 0 auto;
}

.article-content {
  font-size: 17px;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 26px;
  margin: 40px 0 16px 0;
  color: #ffffff;
}

.article-content h3 {
  font-size: 21px;
  margin: 30px 0 12px 0;
  color: #f3f4f6;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-callout {
  background: rgba(0, 242, 254, 0.06);
  border-left: 4px solid var(--cyan);
  padding: 24px;
  border-radius: 0 16px 16px 0;
  margin: 36px 0;
}