:root {
  --bg-page: #f6f8fc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f4fa;
  --bg-glass: rgba(255, 255, 255, 0.84);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-light: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(99, 102, 241, 0.24);

  /* Inspired by Image 1 Gradient Accent adapted for Light Mode */
  --grad-primary: linear-gradient(135deg, #a855f7 0%, #7c3aed 45%, #4f46e5 100%);
  --grad-secondary: linear-gradient(135deg, #6366f1 0%, #3b82f6 100%);
  --grad-soft: linear-gradient(135deg, rgba(168, 85, 247, 0.1) 0%, rgba(79, 70, 229, 0.08) 100%);
  --accent-purple: #7c3aed;
  --accent-indigo: #4f46e5;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-card: 0 12px 32px -12px rgba(79, 70, 229, 0.1), 0 2px 6px rgba(15, 23, 42, 0.03);
  --shadow-hover: 0 20px 40px -14px rgba(124, 58, 237, 0.18), 0 4px 12px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 10px 26px -6px rgba(124, 58, 237, 0.42);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 8% 4%, rgba(168, 85, 247, 0.08) 0%, transparent 38%),
    radial-gradient(circle at 92% 10%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 65%, rgba(99, 102, 241, 0.04) 0%, transparent 48%);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Utilities */
.gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  background: var(--grad-soft);
  color: var(--accent-purple);
  border: 1px solid rgba(124, 58, 237, 0.16);
}

.badge-green {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.2);
}

.badge-blue {
  background: rgba(59, 130, 246, 0.1);
  color: #2563eb;
  border-color: rgba(59, 130, 246, 0.2);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
  border-color: rgba(245, 158, 11, 0.25);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  position: relative;
  display: inline-block;
}

.pulse-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.35);
  animation: pulseRing 2s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes pulseRing {
  0% { transform: scale(0.7); opacity: 0.9; }
  80%, 100% { transform: scale(1.9); opacity: 0; }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
}

/* Image 1 style icon badge */
.icon-squircle {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--grad-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-glow);
  flex-shrink: 0;
}

.icon-squircle-soft {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--grad-soft);
  color: var(--accent-purple);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(124, 58, 237, 0.14);
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -6px rgba(124, 58, 237, 0.5);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-primary);
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--border-strong);
  color: var(--accent-purple);
  transform: translateY(-1px);
}

.btn-soft {
  background: var(--grad-soft);
  color: var(--accent-purple);
  border-color: rgba(124, 58, 237, 0.16);
}

.btn-soft:hover {
  background: rgba(124, 58, 237, 0.14);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.8125rem;
}

/* Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--grad-primary);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 8px 18px -5px rgba(124, 58, 237, 0.45);
}

.brand-sub {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.2s ease, color 0.2s ease;
  background: transparent;
  border: none;
}

.nav-link:hover,
.nav-item.open > .nav-link,
.nav-link.active {
  color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.08);
}

.nav-link svg.chevron {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.nav-item.open > .nav-link svg.chevron,
.nav-item:hover > .nav-link svg.chevron {
  transform: rotate(180deg);
}

/* Dropdown menu */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 260px;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: 0 22px 44px -12px rgba(15, 23, 42, 0.14);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 120;
}

.dropdown-menu-wide {
  min-width: 340px;
}

.nav-item:hover > .dropdown-menu,
.nav-item.open > .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 10px 12px;
  border-radius: 12px;
  transition: background 0.16s ease;
}

.dropdown-item:hover {
  background: var(--bg-subtle);
}

.dropdown-item-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

.dropdown-item-desc {
  font-size: 0.775rem;
  color: var(--text-muted);
  display: block;
  line-height: 1.4;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-light);
  background: #ffffff;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s;
}

.search-trigger:hover {
  border-color: var(--border-strong);
  color: var(--accent-purple);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.1);
}

.search-kbd {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background: #ffffff;
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
}

/* Hero Dashboard Section */
.hero-section {
  padding: 36px 0 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: stretch;
}

.hero-left {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 34px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.hero-left::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.14), transparent 70%);
  pointer-events: none;
}

.hero-title {
  margin: 16px 0 14px;
  font-size: clamp(1.85rem, 3.2vw, 2.55rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  font-weight: 800;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0 0 22px;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}

.metric-box {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.metric-val {
  font-size: 1.25rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  display: block;
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Dashboard Chart Card (Right Hero) */
.dashboard-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.dash-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.dash-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
}

.dash-tabs {
  display: inline-flex;
  background: var(--bg-subtle);
  padding: 4px;
  border-radius: 999px;
  gap: 4px;
}

.dash-tab {
  border: none;
  background: transparent;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.dash-tab.active {
  background: #ffffff;
  color: var(--accent-purple);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
}

.chart-stage {
  background: linear-gradient(180deg, rgba(241, 244, 250, 0.7) 0%, rgba(255, 255, 255, 0.9) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.chart-kpis {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.chart-kpi-item strong {
  display: block;
  font-size: 1.1rem;
  font-family: var(--font-mono);
}

.chart-kpi-item span {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.chart-svg-wrap {
  width: 100%;
  height: 170px;
}

.quick-sub-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.16);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  flex-wrap: wrap;
}

.quick-sub-url {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 240px;
}

/* Section Headers */
.section {
  padding: 48px 0;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
  flex-wrap: wrap;
}

.section-title {
  margin: 8px 0 6px;
  font-size: clamp(1.5rem, 2.4vw, 1.95rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.96rem;
  max-width: 680px;
}

/* Node Table & Cards */
.panel-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.node-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-pill {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-light);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-size: 0.83rem;
  font-weight: 600;
  transition: all 0.18s ease;
}

.filter-pill.active,
.filter-pill:hover {
  background: var(--grad-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 16px -4px rgba(124, 58, 237, 0.35);
}

.node-table-wrap {
  overflow-x: auto;
}

.node-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 8px;
  min-width: 780px;
}

.node-table th {
  text-align: left;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 14px 8px;
}

.node-table tbody tr {
  background: #fafbfe;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.node-table tbody tr:hover {
  background: #ffffff;
  box-shadow: 0 6px 20px -8px rgba(79, 70, 229, 0.18);
  transform: translateY(-1px);
}

.node-table td {
  padding: 13px 14px;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
  vertical-align: middle;
}

.node-table td:first-child {
  border-left: 1px solid var(--border-light);
  border-radius: 12px 0 0 12px;
}

.node-table td:last-child {
  border-right: 1px solid var(--border-light);
  border-radius: 0 12px 12px 0;
}

.node-name-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.flag-emoji {
  font-size: 1.25rem;
  line-height: 1;
}

.ping-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.ping-fast { background: rgba(16, 185, 129, 0.12); color: #059669; }
.ping-mid { background: rgba(245, 158, 11, 0.14); color: #d97706; }

.rate-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 8px;
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.unlock-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.mini-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.08);
  color: var(--accent-indigo);
  font-weight: 600;
}

/* Pricing Grid (Image 2 Structure in Light Gradient Style) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 32px 26px 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
  border: 2px solid transparent;
  background:
    linear-gradient(#ffffff, #ffffff) padding-box,
    var(--grad-primary) border-box;
  box-shadow: 0 22px 46px -14px rgba(124, 58, 237, 0.24);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-primary);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow-glow);
}

.plan-name {
  text-align: center;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 4px 0 12px;
}

.plan-price {
  text-align: center;
  margin-bottom: 22px;
}

.plan-price .amount {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.pricing-card.featured .plan-price .amount {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.plan-price .period {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-features {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.plan-features li {
  text-align: center;
  padding: 11px 8px;
  border-top: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
}

.plan-features li:last-child {
  border-bottom: 1px solid var(--border-light);
}

.plan-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Quick Config & Client Download Center */
.client-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.client-card {
  background: #fafbfe;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.client-card:hover {
  background: #ffffff;
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.client-card h3 {
  margin: 0 0 4px;
  font-size: 1.02rem;
}

.client-card p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

/* Knowledge Base / 12 Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.article-card h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--text-primary);
}

.article-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.article-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-purple);
}

/* Reviews & FAQ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.review-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.review-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--grad-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.stars {
  color: #f59e0b;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.open {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 18px 20px;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease;
  padding: 0 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 20px 18px;
}

.faq-icon {
  transition: transform 0.2s ease;
  color: var(--accent-purple);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

/* Footer */
.site-footer {
  margin-top: 48px;
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  padding: 48px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 28px;
  margin-bottom: 32px;
}

.footer-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent-purple);
}

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Global Search Modal */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.42);
  backdrop-filter: blur(6px);
  z-index: 300;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 72px 16px 24px;
}

.search-modal-backdrop.open {
  display: flex;
}

.search-modal {
  width: 100%;
  max-width: 720px;
  background: #ffffff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: 0 30px 70px -15px rgba(15, 23, 42, 0.25);
  overflow: hidden;
  animation: modalIn 0.18s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(-10px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background: transparent;
}

.search-hot-wrap {
  padding: 14px 20px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-light);
}

.search-hot-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 9px;
  display: block;
}

.hot-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.hot-chip {
  padding: 5px 11px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--border-light);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.hot-chip:hover {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.06);
}

.search-results {
  max-height: 360px;
  overflow-y: auto;
  padding: 10px 14px 16px;
}

.search-result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 12px;
  transition: background 0.15s ease;
}

.search-result-item:hover {
  background: var(--bg-subtle);
}

.search-result-title {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--text-primary);
}

.search-result-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 400;
  background: #0f172a;
  color: #ffffff;
  padding: 12px 18px;
  border-radius: 14px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 18px 36px -8px rgba(15, 23, 42, 0.35);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Independent Article Page Layout */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 28px;
  padding: 28px 0 56px;
  align-items: start;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.breadcrumbs a:hover {
  color: var(--accent-purple);
}

.article-paper {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  box-shadow: var(--shadow-card);
}

.article-paper h1 {
  margin: 12px 0 16px;
  font-size: clamp(1.6rem, 2.8vw, 2.15rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.84rem;
  color: var(--text-muted);
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.tldr-box {
  background: var(--grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 26px;
}

.tldr-box strong {
  color: var(--accent-purple);
  display: block;
  margin-bottom: 6px;
}

.article-body h2 {
  margin: 30px 0 12px;
  font-size: 1.35rem;
  padding-left: 12px;
  border-left: 4px solid var(--accent-purple);
}

.article-body h3 {
  margin: 22px 0 10px;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.article-body p {
  margin: 0 0 15px;
  color: #1e293b;
  font-size: 1rem;
  line-height: 1.85;
}

.article-body ul, .article-body ol {
  margin: 0 0 16px;
  padding-left: 22px;
  color: #1e293b;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-body a.inline-link {
  color: var(--accent-purple);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(124, 58, 237, 0.35);
  text-underline-offset: 3px;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 18px 0 22px;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.article-table th,
.article-table td {
  padding: 11px 14px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.article-table th {
  background: var(--bg-subtle);
  font-weight: 700;
}

.code-block {
  background: #0f172a;
  color: #e2e8f0;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  overflow-x: auto;
  margin: 16px 0 20px;
  line-height: 1.65;
}

.article-cta-banner {
  margin-top: 30px;
  background: var(--grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.22);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: sticky;
  top: 88px;
}

.sidebar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.sidebar-card h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.related-list a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--bg-subtle);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: background 0.15s, color 0.15s;
}

.related-list a:hover {
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent-purple);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }
  .pricing-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .client-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .search-kbd {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--border-light);
    padding: 14px 20px 20px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
  }
  .nav-links.mobile-open .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--bg-subtle);
    margin-top: 4px;
    display: none;
  }
  .nav-links.mobile-open .nav-item.open > .dropdown-menu {
    display: block;
  }
  .pricing-grid,
  .articles-grid,
  .reviews-grid,
  .client-grid,
  .faq-list,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-left,
  .dashboard-card,
  .article-paper {
    padding: 22px;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
}