/* Aurora Borealis Theme - WPS Office Download Site */
:root {
  --base-dark: #0b1120;
  --base-deep: #0f172a;
  --base-mid: #1e293b;
  --aurora-green: #10b981;
  --aurora-cyan: #06b6d4;
  --aurora-violet: #8b5cf6;
  --aurora-pink: #ec4899;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --surface-light: #f1f5f9;
  --surface-white: #ffffff;
  --gradient-aurora: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #8b5cf6 100%);
  --gradient-hero: linear-gradient(180deg, #0b1120 0%, #0f172a 50%, #1e1b4b 100%);
  --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.15);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--surface-light);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(16, 185, 129, 0.3); }
  50% { box-shadow: 0 0 40px rgba(16, 185, 129, 0.6); }
}

@keyframes aurora-flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-aurora);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 14px;
}

.nav-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.1);
}

.nav-link.active {
  color: white;
  background: linear-gradient(135deg, var(--aurora-green) 0%, var(--aurora-cyan) 100%);
}

.nav-dl {
  padding: 10px 22px;
  border-radius: 24px;
  background: var(--gradient-aurora);
  color: white;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-dl:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--gradient-aurora);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-white {
  background: white;
  color: var(--base-deep);
}

.btn-white:hover {
  background: var(--surface-light);
}

.btn-outline {
  background: transparent;
  color: var(--aurora-green);
  border: 2px solid var(--aurora-green);
}

.btn-outline:hover {
  background: var(--aurora-green);
  color: white;
}

.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-sm { padding: 10px 20px; font-size: 13px; }

/* Sections */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.sec {
  padding: 80px 0;
}

.sec-dark {
  background: var(--gradient-hero);
  color: var(--text-primary);
}

.sec-light {
  background: var(--surface-light);
  color: var(--base-deep);
}

.sec-white {
  background: var(--surface-white);
  color: var(--base-deep);
}

.sec-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--aurora-green);
  margin-bottom: 16px;
}

.sec-eyebrow-dot {
  width: 8px;
  height: 8px;
  background: var(--aurora-green);
  border-radius: 50%;
  animation: pulse-glow 2s infinite;
}

.sec-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.sec-title-light { color: white; }

.sec-sub {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.sec-sub-light { color: rgba(255, 255, 255, 0.7); }

.hl { background: var(--gradient-aurora); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Hero Section */
.hero {
  padding: 100px 0 120px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 80%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  animation: aurora-flow 15s ease infinite;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-glow 2s infinite;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  color: white;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-trust {
  display: flex;
  gap: 24px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.hero-trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--aurora-green);
}

/* Hero Visual - Aurora Workspace Mockup */
.hero-visual {
  position: relative;
  animation: float 6s ease-in-out infinite;
}

.aurora-mockup {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}

.mockup-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.mockup-dot.r { background: #ef4444; }
.mockup-dot.y { background: #eab308; }
.mockup-dot.g { background: #22c55e; }

.mockup-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.mockup-tab {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

.mockup-tab.active {
  background: rgba(16, 185, 129, 0.3);
  color: var(--aurora-green);
}

.mockup-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}

.mockup-doc {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 16px;
  min-height: 180px;
}

.mockup-line {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  margin-bottom: 10px;
}

.mockup-line.wide { width: 100%; }
.mockup-line.medium { width: 70%; }
.mockup-line.short { width: 40%; }

.mockup-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mockup-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.mockup-card-icon {
  width: 32px;
  height: 32px;
  margin: 0 auto 8px;
  background: var(--gradient-aurora);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-card-val {
  font-size: 20px;
  font-weight: 700;
  color: white;
}

.mockup-card-lbl {
  font-size: 11px;
  color: var(--text-muted);
}

/* Feature Cards */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feat-card {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 32px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.feat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-aurora);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.feat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
}

.feat-card:hover::before {
  transform: scaleX(1);
}

.feat-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feat-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--aurora-green); }
.feat-icon.cyan { background: rgba(6, 182, 212, 0.1); color: var(--aurora-cyan); }
.feat-icon.violet { background: rgba(139, 92, 246, 0.1); color: var(--aurora-violet); }
.feat-icon.pink { background: rgba(236, 72, 153, 0.1); color: var(--aurora-pink); }
.feat-icon.amber { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.feat-icon.rose { background: rgba(244, 63, 94, 0.1); color: #f43f5e; }

.feat-icon svg {
  width: 28px;
  height: 28px;
}

.feat-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 10px;
}

.feat-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Platform Grid */
.plat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.plat-card {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 28px;
  text-align: center;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all 0.3s;
}

.plat-card.featured {
  background: var(--gradient-aurora);
  color: white;
  border: none;
  transform: scale(1.02);
}

.plat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
}

.plat-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.plat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.plat-card.featured .plat-icon {
  background: rgba(255, 255, 255, 0.2);
}

.plat-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.plat-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.plat-ver {
  font-size: 13px;
  opacity: 0.8;
  margin-bottom: 16px;
}

.plat-desc {
  font-size: 13px;
  opacity: 0.7;
  line-height: 1.5;
  margin-bottom: 20px;
}

.plat-btn {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.plat-card:not(.featured) .plat-btn {
  background: rgba(16, 185, 129, 0.1);
  color: var(--aurora-green);
}

.plat-card:not(.featured) .plat-btn:hover {
  background: var(--aurora-green);
  color: white;
}

.plat-card.featured .plat-btn {
  background: white;
  color: var(--base-deep);
}

.plat-card.featured .plat-btn:hover {
  background: rgba(255, 255, 255, 0.9);
}

/* Deep Feature Rows */
.deep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.deep-row:last-child { margin-bottom: 0; }

.deep-row.flip { direction: rtl; }
.deep-row.flip > * { direction: ltr; }

.deep-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}

.deep-chip.green { background: rgba(16, 185, 129, 0.1); color: var(--aurora-green); }
.deep-chip.cyan { background: rgba(6, 182, 212, 0.1); color: var(--aurora-cyan); }
.deep-chip.violet { background: rgba(139, 92, 246, 0.1); color: var(--aurora-violet); }
.deep-chip.pink { background: rgba(236, 72, 153, 0.1); color: var(--aurora-pink); }

.deep-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--base-deep);
  margin-bottom: 16px;
  line-height: 1.2;
}

.deep-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.deep-list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--base-mid);
}

.deep-list-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.deep-list-dot.green { background: rgba(16, 185, 129, 0.1); color: var(--aurora-green); }
.deep-list-dot.cyan { background: rgba(6, 182, 212, 0.1); color: var(--aurora-cyan); }
.deep-list-dot.violet { background: rgba(139, 92, 246, 0.1); color: var(--aurora-violet); }

.deep-list-dot svg {
  width: 12px;
  height: 12px;
}

/* Deep Visual */
.deep-visual {
  background: var(--surface-white);
  border-radius: 20px;
  padding: 32px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--shadow-card);
}

.dv-panel {
  background: var(--surface-light);
  border-radius: 12px;
  padding: 20px;
}

.dv-panel.dark {
  background: var(--base-deep);
}

.dv-panel-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--base-deep);
}

.dv-panel.dark .dv-panel-title {
  color: white;
}

.dv-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.dv-bar-label {
  font-size: 12px;
  color: var(--text-muted);
  width: 60px;
  flex-shrink: 0;
}

.dv-bar-track {
  flex: 1;
  height: 8px;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 4px;
  overflow: hidden;
}

.dv-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease;
}

.dv-bar-fill.green { background: var(--aurora-green); }
.dv-bar-fill.cyan { background: var(--aurora-cyan); }
.dv-bar-fill.violet { background: var(--aurora-violet); }
.dv-bar-fill.pink { background: var(--aurora-pink); }

.dv-bar-val {
  font-size: 12px;
  font-weight: 600;
  color: var(--base-deep);
  width: 40px;
  text-align: right;
}

.dv-panel.dark .dv-bar-val {
  color: white;
}

.dv-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.dv-stat {
  text-align: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;
}

.dv-panel.dark .dv-stat {
  background: rgba(255, 255, 255, 0.1);
}

.dv-stat-num {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 4px;
}

.dv-stat-num.green { color: var(--aurora-green); }
.dv-stat-num.cyan { color: var(--aurora-cyan); }
.dv-stat-num.violet { color: var(--aurora-violet); }

.dv-stat-lbl {
  font-size: 12px;
  color: var(--text-muted);
}

.dv-panel.dark .dv-stat-lbl {
  color: rgba(255, 255, 255, 0.6);
}

/* Stats Band */
.stats-band {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 8px;
}

.stat-num.green { color: var(--aurora-green); }
.stat-num.cyan { color: var(--aurora-cyan); }
.stat-num.violet { color: var(--aurora-violet); }
.stat-num.pink { color: var(--aurora-pink); }

.stat-lbl {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

/* Reviews */
.rev-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.rev-card {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 28px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all 0.3s;
}

.rev-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
}

.rev-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.rev-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: white;
}

.rev-avatar.green { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.rev-avatar.cyan { background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%); }
.rev-avatar.violet { background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%); }
.rev-avatar.pink { background: linear-gradient(135deg, #ec4899 0%, #db2777 100%); }
.rev-avatar.amber { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.rev-avatar.rose { background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%); }

.rev-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--base-deep);
}

.rev-role {
  font-size: 12px;
  color: var(--text-muted);
}

.rev-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 12px;
}

.rev-stars svg {
  width: 16px;
  height: 16px;
  color: #fbbf24;
  fill: #fbbf24;
}

.rev-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Comparison Table */
.cmp-wrap {
  background: var(--surface-white);
  border-radius: 20px;
  padding: 40px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  overflow-x: auto;
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.cmp-table th,
.cmp-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.cmp-table th {
  font-size: 14px;
  font-weight: 700;
  color: var(--base-deep);
  background: var(--surface-light);
}

.cmp-table td {
  font-size: 14px;
  color: var(--base-mid);
}

.cmp-table tr:hover td {
  background: rgba(16, 185, 129, 0.05);
}

.cmp-hl {
  color: var(--aurora-green);
  font-weight: 600;
}

.cmp-yes {
  color: var(--aurora-green);
  font-weight: 600;
}

.cmp-no {
  color: #ef4444;
}

.cmp-part {
  color: #f59e0b;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface-white);
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--base-deep);
  text-align: left;
}

.faq-question:hover {
  background: rgba(16, 185, 129, 0.05);
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s;
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* CTA Banner */
.cta-banner {
  background: var(--gradient-aurora);
  border-radius: 24px;
  padding: 60px;
  text-align: center;
  color: white;
}

.cta-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.cta-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 17px;
  opacity: 0.9;
  max-width: 500px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Download Page Specific */
.dl-hero {
  padding: 80px 0 60px;
  background: var(--gradient-hero);
  text-align: center;
}

.dl-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  font-size: 13px;
  color: white;
  margin-bottom: 20px;
}

.dl-hero-tag-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-glow 2s infinite;
}

.dl-hero-title {
  font-size: 42px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
}

.dl-hero-sub {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

/* Download Main Card */
.dl-main-wrap {
  max-width: 600px;
  margin: -40px auto 60px;
  position: relative;
  z-index: 10;
}

.dl-main-card {
  background: var(--surface-white);
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  text-align: center;
}

.dl-main-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.dl-main-icon {
  width: 72px;
  height: 72px;
  background: var(--gradient-aurora);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dl-main-icon svg {
  width: 36px;
  height: 36px;
  color: white;
}

.dl-main-info {
  text-align: left;
}

.dl-main-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 4px;
}

.dl-main-meta {
  font-size: 14px;
  color: var(--text-muted);
}

.dl-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.dl-spec {
  background: var(--surface-light);
  border-radius: 12px;
  padding: 16px;
}

.dl-spec-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.dl-spec-val {
  font-size: 15px;
  font-weight: 600;
  color: var(--base-deep);
}

.dl-sec-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 20px;
  font-size: 13px;
  color: var(--aurora-green);
  margin-bottom: 24px;
}

.dl-sec-badge svg {
  width: 16px;
  height: 16px;
}

.dl-main-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* Other Platform Cards */
.op-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.op-card {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 28px;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.op-icon {
  width: 56px;
  height: 56px;
  background: var(--surface-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.op-icon svg {
  width: 28px;
  height: 28px;
  color: var(--base-mid);
}

.op-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 4px;
}

.op-ver {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.op-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.op-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.op-step-n {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--surface-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--base-mid);
  flex-shrink: 0;
}

/* Guide Section */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.guide-col-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 24px;
}

.guide-col-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.guide-col-dot.green { background: var(--aurora-green); }
.guide-col-dot.cyan { background: var(--aurora-cyan); }

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.gstep {
  display: flex;
  gap: 16px;
}

.gstep-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.gstep-num.green { background: var(--aurora-green); }
.gstep-num.cyan { background: var(--aurora-cyan); }

.gstep-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--base-deep);
  margin-bottom: 4px;
}

.gstep-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Requirements */
.req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}

.req-card {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.req-icon {
  width: 48px;
  height: 48px;
  background: var(--surface-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.req-icon svg {
  width: 24px;
  height: 24px;
  color: var(--base-mid);
}

.req-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--base-deep);
  margin-bottom: 4px;
}

.req-val {
  font-size: 13px;
  color: var(--text-muted);
}

/* Version Timeline */
.ver-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 60px;
}

.ver-item {
  display: flex;
  gap: 20px;
}

.ver-dot-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.ver-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
}

.ver-dot.green { background: var(--aurora-green); }
.ver-dot.cyan { background: var(--aurora-cyan); }
.ver-dot.violet { background: var(--aurora-violet); }
.ver-dot.pink { background: var(--aurora-pink); }
.ver-dot.amber { background: #f59e0b; }

.ver-line {
  width: 2px;
  flex: 1;
  background: rgba(148, 163, 184, 0.3);
}

.ver-item:last-child .ver-line {
  display: none;
}

.ver-body {
  flex: 1;
  background: var(--surface-white);
  border-radius: 12px;
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.ver-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.ver-num {
  font-size: 16px;
  font-weight: 700;
  color: var(--base-deep);
}

.ver-tag {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.ver-tag.stable { background: rgba(16, 185, 129, 0.1); color: var(--aurora-green); }
.ver-tag.beta { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.ver-tag.lts { background: rgba(139, 92, 246, 0.1); color: var(--aurora-violet); }

.ver-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.ver-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Security Banner */
.sec-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 60px;
}

.sec-banner-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-aurora);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sec-banner-icon svg {
  width: 30px;
  height: 30px;
  color: white;
}

.sec-banner-text {
  flex: 1;
}

.sec-banner-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 6px;
}

.sec-banner-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Article Page */
.art-hero {
  background: var(--gradient-hero);
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.art-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 30% 70%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.art-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.art-hero-crumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}

.art-hero-crumb a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
}

.art-hero-crumb a:hover {
  color: white;
}

.art-hero-title {
  font-size: 40px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  line-height: 1.2;
}

.art-hero-sub {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* Keyword Strip */
.kw-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-width: 800px;
  margin: 30px auto 0;
}

.kw {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
}

/* Article Layout */
.art-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

.art-body {
  background: var(--surface-white);
  border-radius: 20px;
  padding: 40px;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.art-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--base-deep);
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--surface-light);
}

.art-body h2:first-child {
  margin-top: 0;
}

.art-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--base-deep);
  margin: 28px 0 14px;
}

.art-body p {
  font-size: 15px;
  color: var(--base-mid);
  line-height: 1.8;
  margin-bottom: 16px;
}

.art-body ul,
.art-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.art-body li {
  font-size: 15px;
  color: var(--base-mid);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* Inline CTA */
.inline-cta {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 16px;
  padding: 24px;
  margin: 28px 0;
  display: flex;
  align-items: center;
  gap: 20px;
}

.inline-cta-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-aurora);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.inline-cta-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.inline-cta-body {
  flex: 1;
}

.inline-cta-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 6px;
}

.inline-cta-desc {
  font-size: 14px;
  color: var(--text-muted);
}

/* Tips Grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.tip-card {
  background: var(--surface-light);
  border-radius: 12px;
  padding: 20px;
  border-left: 4px solid var(--aurora-green);
}

.tip-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--aurora-green);
  margin-bottom: 8px;
}

.tip-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--base-deep);
  margin-bottom: 6px;
}

.tip-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sbox {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  position: sticky;
  top: 88px;
}

.sbox-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--surface-light);
}

.sdl-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  margin-bottom: 10px;
  border-radius: 12px;
  border: none;
  background: var(--surface-light);
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.sdl-btn:hover {
  background: rgba(16, 185, 129, 0.1);
}

.sdl-btn.primary {
  background: var(--gradient-aurora);
  color: white;
}

.sdl-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.sdl-btn-icon {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sdl-btn-icon svg {
  width: 20px;
  height: 20px;
}

.sdl-btn-info {
  flex: 1;
}

.sdl-btn-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.sdl-btn-ver {
  font-size: 11px;
  opacity: 0.8;
}

/* TOC */
.stoc {
  list-style: none;
  padding: 0;
  margin: 0;
}

.stoc li {
  margin-bottom: 4px;
}

.stoc a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.2s;
}

.stoc a:hover {
  background: var(--surface-light);
  color: var(--base-deep);
}

/* Stats */
.sstat {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.sstat-item {
  text-align: center;
  padding: 16px;
  background: var(--surface-light);
  border-radius: 12px;
}

.sstat-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--aurora-green);
  margin-bottom: 4px;
}

.sstat-lbl {
  font-size: 12px;
  color: var(--text-muted);
}

/* Side Security */
.side-security {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
}

.side-security svg {
  width: 20px;
  height: 20px;
  color: var(--aurora-green);
  flex-shrink: 0;
}

.side-security p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Footer */
.site-footer {
  background: var(--base-deep);
  padding: 40px 0;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.footer-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--gradient-aurora);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 12px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: white;
}

.footer-security {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 20px;
  font-size: 13px;
  color: var(--aurora-green);
  margin-bottom: 16px;
}

.footer-security svg {
  width: 16px;
  height: 16px;
}

.footer-note {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .art-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .sbox { position: static; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.show {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--base-deep);
    flex-direction: column;
    padding: 16px;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
  }
  
  .hero-title { font-size: 36px; }
  .sec-title { font-size: 28px; }
  .dl-hero-title { font-size: 32px; }
  .art-hero-title { font-size: 28px; }
  
  .feat-grid { grid-template-columns: 1fr; }
  .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .rev-grid { grid-template-columns: 1fr; }
  .deep-row { grid-template-columns: 1fr; gap: 40px; }
  .deep-row.flip { direction: ltr; }
  .op-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .tips-grid { grid-template-columns: 1fr; }
  
  .cta-banner { padding: 40px 24px; }
  .cta-title { font-size: 26px; }
  
  .dl-specs { grid-template-columns: repeat(2, 1fr); }
  
  .sec { padding: 60px 0; }
  .hero { padding: 60px 0 80px; }
}

@media (max-width: 480px) {
  .plat-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: 1fr; }
  .dl-specs { grid-template-columns: 1fr; }
}

/* News Section Styles */
.news-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.news-card {
  background: var(--surface-white);
  border-radius: 16px;
  padding: 32px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all 0.3s;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.news-date {
  font-size: 13px;
  color: var(--text-muted);
}

.news-tag {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.tag-green { background: rgba(16, 185, 129, 0.1); color: var(--aurora-green); }
.tag-cyan { background: rgba(6, 182, 212, 0.1); color: var(--aurora-cyan); }
.tag-violet { background: rgba(139, 92, 246, 0.1); color: var(--aurora-violet); }

.news-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--base-deep);
  margin-bottom: 12px;
  line-height: 1.3;
}

.news-excerpt {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--aurora-green);
  font-weight: 600;
  text-decoration: none;
  transition: gap 0.2s;
}

.news-link:hover {
  gap: 10px;
}

.news-link svg {
  transition: transform 0.2s;
}

.news-link:hover svg {
  transform: translateX(4px);
}