/* ── Design tokens ── */
:root {
  --bg: #080c14;
  --bg-elevated: #0f1520;
  --surface: #151c2c;
  --surface-hover: #1a2336;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #eef2f8;
  --text-secondary: #8b9ab5;
  --text-muted: #5c6b85;
  --accent: #4f8cff;
  --accent-hover: #6ba0ff;
  --accent-glow: rgba(79, 140, 255, 0.25);
  --gold: #f0b429;
  --gold-dim: rgba(240, 180, 41, 0.12);
  --green: #34d399;
  --green-dim: rgba(52, 211, 153, 0.12);
  --red: #f87171;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --font: "Noto Sans SC", "DM Sans", ui-sans-serif, system-ui, sans-serif;
  --header-h: 64px;
  --max-w: 1200px;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, h4, p { margin: 0; }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  z-index: 999;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-outline:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 0 12px;
}
.btn-ghost:hover { color: var(--text); }
.btn-lg { min-height: 48px; padding: 0 28px; font-size: 15px; }
.btn-sm { min-height: 34px; padding: 0 14px; font-size: 13px; }
.btn-block { width: 100%; }

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(16px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #7c5cfc);
  color: #fff;
  font-weight: 900;
  font-size: 16px;
}
.logo-icon.sm { width: 32px; height: 32px; font-size: 14px; }
.logo-text strong { display: block; font-size: 15px; line-height: 1.2; }
.logo-text small { display: block; color: var(--text-muted); font-size: 11px; }

.nav {
  display: flex;
  gap: 4px;
}
.nav a {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
}
.nav a:hover, .nav a.active {
  color: var(--text);
  background: var(--surface);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ── */
.hero {
  padding: 64px 24px 48px;
  background:
    radial-gradient(ellipse 60% 50% at 20% 0%, rgba(79, 140, 255, 0.12), transparent),
    radial-gradient(ellipse 40% 40% at 80% 10%, rgba(124, 92, 252, 0.08), transparent);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 480px;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-stats {
  display: flex;
  gap: 32px;
}
.stat strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
}
.stat span {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-visual {
  position: relative;
}
.hero-visual > img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.hero-card {
  position: absolute;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: rgba(21, 28, 44, 0.92);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}
.hero-card .card-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.hero-card strong { font-size: 13px; }
.card-1 { left: -16px; bottom: 24px; }
.card-2 { top: 20px; right: -12px; }

/* ── Quick nav ── */
.quick-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 50;
  border-block: 1px solid var(--border);
  background: rgba(15, 21, 32, 0.9);
  backdrop-filter: blur(12px);
}
.quick-nav-inner {
  display: flex;
  gap: 4px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 10px 24px;
  overflow-x: auto;
  scrollbar-width: none;
}
.quick-nav-inner::-webkit-scrollbar { display: none; }
.quick-nav-inner a {
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
}
.quick-nav-inner a:hover {
  color: var(--text);
  background: var(--surface);
}

/* ── Sections ── */
.section {
  padding: 72px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.section-alt {
  max-width: none;
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}
.section-alt > *:not(.steps):not(.faq-list) {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
.section-header {
  margin-bottom: 36px;
}
.section-header.center { text-align: center; }
.section-tag {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.section-header p {
  color: var(--text-secondary);
  max-width: 560px;
}
.section-header.center p { margin: 0 auto; }

/* ── Shop ── */
.shop-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}
.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--border-strong); color: var(--text); }
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.rate-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius);
  background: var(--gold-dim);
  border: 1px solid rgba(240, 180, 41, 0.2);
  font-size: 13px;
}
.rate-chip span { color: var(--text-muted); }
.rate-chip strong { color: var(--gold); }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.product-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.product-item:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.product-item.featured {
  border-color: rgba(79, 140, 255, 0.4);
  box-shadow: 0 0 0 1px rgba(79, 140, 255, 0.15);
}
.product-item.hidden { display: none; }
.hidden { display: none !important; }
.product-img {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 18px;
  background: linear-gradient(180deg, var(--bg-elevated), var(--surface));
  border-bottom: 1px solid var(--border);
}
.product-img img {
  width: 82%;
  height: 82%;
  object-fit: contain;
  object-position: center;
  border-radius: 18%;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}
.product-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--gold);
  color: #1a1200;
  font-size: 11px;
  font-weight: 800;
}
.product-info { padding: 20px; }
.product-cat {
  display: block;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 6px;
}
.product-info h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.product-duration {
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}
.product-info > p:not(.product-duration) {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
  min-height: 44px;
}
.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.price strong {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
}
.price span {
  display: block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}
.stock {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}
.stock.in-stock {
  background: var(--green-dim);
  color: var(--green);
}

.shop-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 24px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
}
.shop-note svg { flex-shrink: 0; margin-top: 2px; color: var(--accent); }

/* ── Services ── */
.service-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
  padding: 24px 24px 0;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
.service-tab {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.service-tab:hover { color: var(--text); border-color: var(--border-strong); }
.service-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.service-panel {
  display: none;
  padding: 0 24px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.service-panel.active { display: block; }

.service-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.service-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color var(--transition);
}
.service-card:hover { border-color: var(--border-strong); }
.service-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 16px;
}
.service-icon.ai { background: rgba(79, 140, 255, 0.15); color: var(--accent); }
.service-icon.chat { background: rgba(167, 139, 250, 0.15); color: #a78bfa; }
.service-icon.tool { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.service-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.service-card > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}
.service-card ul {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}
.service-card li {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}
.service-card li span { color: var(--text-muted); font-weight: 600; }
.link-arrow {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}
.link-arrow:hover { color: var(--accent-hover); }

.platform-table {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.platform-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1.5fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: 14px;
}
.platform-row:last-child { border-bottom: 0; }
.platform-row.head {
  background: var(--bg);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.platform-name { font-weight: 700; color: var(--text); }
.platform-row span:nth-child(2),
.platform-row span:nth-child(3) { color: var(--text-secondary); }
.platform-row a {
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
}

.exchange-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}
.exchange-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.exchange-card strong {
  display: block;
  font-size: 16px;
  margin-bottom: 6px;
}
.exchange-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}
.disclaimer {
  color: var(--text-muted);
  font-size: 13px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.15);
}

.bundle-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.bundle-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.bundle-label {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--gold-dim);
  color: var(--gold);
  font-size: 11px;
  font-weight: 800;
  margin-bottom: 12px;
}
.bundle-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.bundle-card p {
  color: var(--text-secondary);
  font-size: 14px;
}
.bundle-cta { text-align: center; }

/* ── Guides ── */
.guide-search {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  max-width: 480px;
  margin-bottom: 28px;
}
.guide-search input {
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  outline: none;
  transition: border-color var(--transition);
}
.guide-search input:focus { border-color: var(--accent); }

.guide-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  align-items: start;
}
.guide-nav {
  position: sticky;
  top: calc(var(--header-h) + 56px);
  display: grid;
  gap: 4px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.guide-nav-item {
  padding: 10px 14px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
}
.guide-nav-item:hover { color: var(--text); background: var(--surface-hover); }
.guide-nav-item.active {
  background: rgba(79, 140, 255, 0.12);
  color: var(--accent);
  font-weight: 700;
}

.guide-content {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
}
.guide-article {
  display: none;
  padding: 32px;
}
.guide-article.active { display: block; }
.guide-header {
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.guide-platform {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(79, 140, 255, 0.12);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 12px;
}
.guide-header h3 {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 800;
  margin-bottom: 8px;
}
.guide-header p { color: var(--text-secondary); }
.guide-article section {
  padding-top: 20px;
  margin-top: 4px;
}
.guide-article section + section {
  border-top: 1px solid var(--border);
  margin-top: 20px;
}
.guide-article h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}
.guide-article p, .guide-article li {
  color: var(--text-secondary);
  font-size: 14px;
}
.guide-article ol {
  margin: 0;
  padding-left: 20px;
}
.guide-article li + li { margin-top: 6px; }

/* ── Steps ── */
.steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 24px;
}
.step {
  padding: 20px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  text-align: center;
}
.step-num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: rgba(79, 140, 255, 0.12);
  color: var(--accent);
  font-weight: 800;
  font-size: 14px;
}
.step h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}
.step p {
  color: var(--text-muted);
  font-size: 13px;
}

/* ── Payment ── */
.payment-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}
.payment-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 56px);
  display: grid;
  gap: 16px;
}
.order-status {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.status-indicator {
  width: 10px;
  height: 10px;
  margin-top: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px rgba(240, 180, 41, 0.5);
  flex-shrink: 0;
}
.order-status.ready .status-indicator {
  background: var(--green);
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.5);
}
.order-status strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}
.order-status p {
  color: var(--text-secondary);
  font-size: 13px;
}
.payment-checklist {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.payment-checklist h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
}
.payment-checklist ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 13px;
}
.payment-checklist li + li { margin-top: 8px; }
.payment-warning {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.2);
}
.payment-warning strong {
  display: block;
  font-size: 13px;
  color: var(--red);
  margin-bottom: 4px;
}
.payment-warning p {
  color: var(--text-secondary);
  font-size: 13px;
}

.token-tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  margin-bottom: 16px;
}
.token-tab {
  min-width: 80px;
  padding: 8px 20px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition);
}
.token-tab.active {
  background: var(--accent);
  color: #fff;
}

.pay-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.pay-grid.hidden { display: none; }
.pay-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color var(--transition);
}
.pay-item:hover { border-color: var(--border-strong); }
.pay-item img {
  width: 100px;
  aspect-ratio: 1;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: cover;
}
.pay-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  margin-bottom: 6px;
}
.pay-badge.usdt { background: var(--green-dim); color: var(--green); }
.pay-badge.usdc { background: rgba(79, 140, 255, 0.12); color: var(--accent); }
.pay-details h3 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}
.pay-address {
  display: block;
  margin-bottom: 10px;
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
  word-break: break-all;
  color: var(--text-secondary);
}

/* ── Risk ── */
.section-risk {
  max-width: none;
  padding: 48px 24px;
  background:
    linear-gradient(135deg, rgba(240, 180, 41, 0.06), rgba(79, 140, 255, 0.04)),
    var(--bg);
  border-block: 1px solid var(--border);
}
.risk-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 40px;
  align-items: start;
  max-width: var(--max-w);
  margin: 0 auto;
}
.risk-items {
  margin: 0;
  padding: 0;
  list-style: none;
}
.risk-items li {
  position: relative;
  padding: 12px 0 12px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
}
.risk-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ── FAQ ── */
.faq-list {
  display: grid;
  gap: 8px;
  padding: 0 24px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.faq-list details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}
.faq-list summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  transition: background var(--transition);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:hover { background: var(--surface-hover); }
.faq-list details[open] summary {
  border-bottom: 1px solid var(--border);
}
.faq-list p {
  padding: 16px 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* ── Contact ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 48px;
  align-items: start;
}
.contact-info h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin: 8px 0 12px;
}
.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.contact-channels {
  display: flex;
  gap: 12px;
}
.channel {
  flex: 1;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
}
.channel span {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.channel strong { font-size: 14px; }
.channel.placeholder strong { color: var(--text-muted); }

.contact-form {
  display: grid;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.contact-form label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}
.contact-form select,
.contact-form textarea {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  outline: none;
  transition: border-color var(--transition);
}
.contact-form select:focus,
.contact-form textarea:focus { border-color: var(--accent); }
.contact-form textarea {
  min-height: 100px;
  resize: vertical;
}

/* ── Checkout modal ── */
.checkout-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
}
.checkout-modal[hidden] { display: none; }

.checkout-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
}

.checkout-dialog {
  position: relative;
  width: min(100%, 420px);
  padding: 28px 24px 24px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.checkout-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.checkout-close:hover { background: var(--surface-hover); color: var(--text); }

.checkout-dialog h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 20px;
}

.checkout-product {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.checkout-label {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
}

.checkout-price {
  font-size: 1.4rem;
  color: var(--gold);
}

.checkout-methods {
  padding: 16px 0 20px;
}

.checkout-category {
  padding: 8px 0 4px;
}

.pay-category-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}

.pay-category {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.pay-category:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.pay-category.active {
  border-color: var(--accent);
  background: rgba(79, 140, 255, 0.1);
  color: var(--text);
}

.checkout-token-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 10px 0 14px;
}

.checkout-token {
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
}

.checkout-token.active {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(79, 140, 255, 0.1);
}

.checkout-chain-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.checkout-chain {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.checkout-chain.active {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(79, 140, 255, 0.1);
}

.checkout-crypto-amount {
  margin-top: 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 600;
}

.checkout-back {
  margin-bottom: 12px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
}

.checkout-back:hover {
  color: var(--text);
}

.checkout-pay-order,
.checkout-pay-amount {
  margin: 6px 0;
  color: var(--text-secondary);
  font-size: 13px;
  text-align: center;
}

.checkout-pay-amount {
  color: var(--gold);
  font-weight: 700;
  font-size: 15px;
}

.checkout-qr-frame {
  display: grid;
  place-items: center;
  margin: 16px auto;
  padding: 12px;
  border-radius: 12px;
  background: #fff;
}

.checkout-qr-frame canvas,
.checkout-qr-frame img {
  width: 260px;
  height: 260px;
}

.checkout-qr-frame canvas:not([hidden]),
.checkout-qr-frame img:not([hidden]) {
  display: block;
}

.checkout-pay-address {
  display: block;
  margin: 12px 0;
  padding: 10px;
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 11px;
  word-break: break-all;
  text-align: left;
}

.checkout-pay-hint {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
  line-height: 1.5;
}

.pay-method-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}

.pay-method {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.pay-method:hover { border-color: var(--border-strong); color: var(--text); }

.pay-method.active {
  border-color: var(--accent);
  background: rgba(79, 140, 255, 0.1);
  color: var(--text);
}

.pay-icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 900;
  color: #fff;
}

.pay-icon.alipay { background: #1677ff; }
.pay-icon.wxpay { background: #07c160; }

.checkout-hint {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
}

.section-header p strong {
  color: var(--accent);
  font-weight: 700;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 32px 24px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand strong { display: block; font-size: 14px; }
.footer-brand span { color: var(--text-muted); font-size: 12px; }
.footer-nav {
  display: flex;
  gap: 20px;
}
.footer-nav a {
  color: var(--text-secondary);
  font-size: 13px;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--text); }
.footer-legal span { color: var(--text-muted); font-size: 12px; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero-inner,
  .product-grid,
  .service-cards,
  .exchange-cards,
  .bundle-cards,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .payment-layout { grid-template-columns: 1fr; }
  .payment-sidebar { position: static; }
  .guide-layout { grid-template-columns: 1fr; }
  .guide-nav {
    position: static;
    grid-template-columns: repeat(3, 1fr);
    overflow-x: auto;
  }
  .contact-layout { grid-template-columns: 1fr; }
  .risk-inner { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 12px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 16px; }
  .menu-toggle { display: flex; }
  .header-actions .btn-ghost { display: none; }

  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-card { position: static; margin-top: 12px; }
  .card-1, .card-2 { max-width: none; }

  .product-grid,
  .service-cards,
  .exchange-cards,
  .bundle-cards,
  .pay-grid {
    grid-template-columns: 1fr;
  }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .platform-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .platform-row.head { display: none; }
  .guide-nav { grid-template-columns: repeat(2, 1fr); }
  .contact-channels { flex-direction: column; }
  .pay-item { grid-template-columns: 1fr; }
  .pay-item img { width: 120px; }
}

@media (max-width: 480px) {
  .hero-stats { gap: 20px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .guide-search { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}