/* Modern Workspace · 极简书房主题 */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --accent: #f97316;
  --accent-light: #fb923c;
  --success: #10b981;
  --text-main: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --bg-white: #ffffff;
  --bg-cream: #fafaf9;
  --bg-soft: #f5f5f4;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
  --radius: 12px;
  --radius-lg: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-main);
  line-height: 1.6;
  background: var(--bg-white);
}

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

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

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

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.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;
  font-weight: 700;
  font-size: 20px;
  color: var(--primary);
  text-decoration: none;
}
.nav-brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-brand-icon svg { width: 18px; height: 18px; color: white; }
.nav-links {
  display: flex;
  gap: 8px;
}
.nav-link {
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.nav-link:hover { color: var(--primary); background: var(--bg-soft); }
.nav-link.active {
  color: var(--primary);
  background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(249,115,22,0.1));
}
.nav-toggle { display: none; }

/* Hero Section */
.hero {
  background: linear-gradient(180deg, var(--bg-cream) 0%, var(--bg-white) 100%);
  padding: 80px 24px 100px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(249,115,22,0.06) 0%, transparent 70%);
  animation: float 8s ease-in-out infinite reverse;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-content { animation: fadeInUp 0.6s ease-out; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(249,115,22,0.1));
  border: 1px solid rgba(79,70,229,0.2);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 24px;
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero h1 span { color: var(--primary); }
.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 14px rgba(79,70,229,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79,70,229,0.45);
}
.btn-outline {
  background: white;
  color: var(--text-main);
  border: 1.5px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: white;
  box-shadow: 0 4px 14px rgba(249,115,22,0.35);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249,115,22,0.45);
}
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }

.hero-visual {
  position: relative;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}
.hero-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  border: 1px solid var(--border);
}
.hero-card-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.hero-card-dots { display: flex; gap: 6px; }
.hero-card-dot { width: 10px; height: 10px; border-radius: 50%; }
.hero-card-dot.r { background: #ef4444; }
.hero-card-dot.y { background: #f59e0b; }
.hero-card-dot.g { background: #10b981; }
.hero-card-url {
  flex: 1;
  background: var(--bg-soft);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-light);
}
.hero-card-body { display: flex; flex-direction: column; gap: 16px; }
.hero-mock-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-cream);
  border-radius: 8px;
}
.hero-mock-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-mock-icon.doc { background: rgba(79,70,229,0.1); color: var(--primary); }
.hero-mock-icon.sheet { background: rgba(16,185,129,0.1); color: var(--success); }
.hero-mock-icon.slide { background: rgba(249,115,22,0.1); color: var(--accent); }
.hero-mock-info { flex: 1; }
.hero-mock-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}
.hero-mock-desc {
  font-size: 11px;
  color: var(--text-light);
}
.hero-mock-meta {
  font-size: 11px;
  color: var(--text-light);
}

/* Section Styles */
.section {
  padding: 80px 24px;
}
.section-cream { background: var(--bg-cream); }
.section-white { background: var(--bg-white); }
.section-gradient {
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-cream) 50%, var(--bg-white) 100%);
}
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-soft);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.section-chip-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
}
.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}
.section-title span { color: var(--primary); }
.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Feature Cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: white;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79,70,229,0.2);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-icon.purple { background: rgba(79,70,229,0.1); color: var(--primary); }
.feature-icon.orange { background: rgba(249,115,22,0.1); color: var(--accent); }
.feature-icon.green { background: rgba(16,185,129,0.1); color: var(--success); }
.feature-icon.blue { background: rgba(59,130,246,0.1); color: #3b82f6; }
.feature-icon.pink { background: rgba(236,72,153,0.1); color: #ec4899; }
.feature-icon.teal { background: rgba(20,184,166,0.1); color: #14b8a6; }
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Platform Section */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.platform-card {
  background: white;
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  border: 1.5px solid var(--border);
  transition: all 0.3s;
}
.platform-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.platform-card.featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(79,70,229,0.03) 0%, white 100%);
  position: relative;
}
.platform-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  padding: 4px 14px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 0 0 8px 8px;
}
.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.platform-icon.win { background: linear-gradient(135deg, #0078d4, #005a9e); color: white; }
.platform-icon.mac { background: linear-gradient(135deg, #555, #333); color: white; }
.platform-icon.ios { background: linear-gradient(135deg, #007aff, #0051d5); color: white; }
.platform-icon.android { background: linear-gradient(135deg, #3ddc84, #2cb86a); color: white; }
.platform-card h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.platform-card p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
}

/* Deep Features */
.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.reverse { direction: rtl; }
.deep-row.reverse > * { direction: ltr; }
.deep-content h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}
.deep-content h3 span { color: var(--primary); }
.deep-content > p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.8;
}
.deep-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.deep-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
}
.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.purple { background: rgba(79,70,229,0.1); color: var(--primary); }
.deep-list-dot.orange { background: rgba(249,115,22,0.1); color: var(--accent); }
.deep-list-dot.green { background: rgba(16,185,129,0.1); color: var(--success); }
.deep-visual {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.deep-visual-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}
.visual-bars { display: flex; flex-direction: column; gap: 16px; }
.visual-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}
.visual-bar-label {
  width: 80px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: right;
}
.visual-bar-track {
  flex: 1;
  height: 28px;
  background: var(--bg-soft);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}
.visual-bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 1s ease-out;
  position: relative;
}
.visual-bar-fill.purple { background: linear-gradient(90deg, var(--primary), #818cf8); }
.visual-bar-fill.orange { background: linear-gradient(90deg, var(--accent), #fdba74); }
.visual-bar-fill.green { background: linear-gradient(90deg, var(--success), #6ee7b7); }
.visual-bar-fill.blue { background: linear-gradient(90deg, #3b82f6, #93c5fd); }
.visual-bar-value {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 600;
  color: white;
}
.visual-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.visual-stat h4 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}
.visual-stat p {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}

/* Stats Section */
.stats-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 60px 24px;
  color: white;
}
.stats-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, white, rgba(255,255,255,0.8));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 15px;
  opacity: 0.85;
}

/* Reviews */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: white;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.review-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #fbbf24;
}
.review-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: white;
}
.review-avatar.purple { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.review-avatar.orange { background: linear-gradient(135deg, #f97316, #fb923c); }
.review-avatar.green { background: linear-gradient(135deg, #10b981, #34d399); }
.review-avatar.blue { background: linear-gradient(135deg, #3b82f6, #60a5fa); }
.review-avatar.pink { background: linear-gradient(135deg, #ec4899, #f472b6); }
.review-avatar.teal { background: linear-gradient(135deg, #14b8a6, #2dd4bf); }
.review-info h5 {
  font-size: 15px;
  font-weight: 600;
}
.review-info p {
  font-size: 13px;
  color: var(--text-light);
}

/* Comparison Table */
.compare-table-wrap {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
}
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th,
.compare-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.compare-table th {
  background: var(--bg-cream);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}
.compare-table td {
  font-size: 14px;
  color: var(--text-secondary);
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table .product-name {
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-table .check {
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 6px;
}
.compare-table .cross {
  color: #ef4444;
  display: flex;
  align-items: center;
  gap: 6px;
}
.compare-table .partial {
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 6px;
}
.compare-table tr:hover td { background: var(--bg-cream); }

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  transition: background 0.2s;
}
.faq-question:hover { background: var(--bg-cream); }
.faq-question h4 {
  font-size: 15px;
  font-weight: 600;
}
.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-light);
  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-out;
}
.faq-item.open .faq-answer { max-height: 500px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
  animation: float 10s ease-in-out infinite;
}
.cta-banner h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
}
.cta-banner p {
  font-size: 17px;
  opacity: 0.9;
  margin-bottom: 28px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  position: relative;
}

/* Footer */
.footer {
  background: var(--bg-cream);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}
.footer-security {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(16,185,129,0.1);
  border-radius: 8px;
  color: var(--success);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}
.footer-note {
  font-size: 13px;
  color: var(--text-light);
}

/* Download Page Specific */
.dl-hero {
  background: linear-gradient(180deg, var(--bg-cream) 0%, var(--bg-white) 100%);
  padding: 60px 24px;
  text-align: center;
}
.dl-hero h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 12px;
}
.dl-hero p {
  font-size: 17px;
  color: var(--text-secondary);
}

.dl-main-card {
  max-width: 600px;
  margin: 0 auto 40px;
  background: white;
  border-radius: var(--radius-lg);
  border: 2px solid var(--primary);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.dl-main-top {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 24px;
  color: white;
  display: flex;
  align-items: center;
  gap: 16px;
}
.dl-main-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.2);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.dl-main-info h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 4px;
}
.dl-main-info p {
  font-size: 14px;
  opacity: 0.9;
}
.dl-main-body { padding: 28px; }
.dl-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.dl-spec {
  text-align: center;
  padding: 16px;
  background: var(--bg-cream);
  border-radius: 10px;
}
.dl-spec-label {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 6px;
}
.dl-spec-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}
.dl-main-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
}
.dl-secure-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 14px;
  background: rgba(16,185,129,0.1);
  border-radius: 20px;
  font-size: 13px;
  color: var(--success);
}

.other-platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}
.op-card {
  background: white;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  text-align: center;
}
.op-card h4 {
  font-size: 17px;
  font-weight: 600;
  margin: 12px 0 4px;
}
.op-card p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
}
.op-steps {
  text-align: left;
  background: var(--bg-cream);
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
}
.op-steps li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.op-steps li:last-child { margin-bottom: 0; }
.op-step-num {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Guide Section */
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.guide-col {
  background: white;
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid var(--border);
}
.guide-col h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.guide-col h3 span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.guide-col h3 span.purple { background: var(--primary); }
.guide-col h3 span.orange { background: var(--accent); }
.guide-steps { display: flex; flex-direction: column; gap: 20px; }
.guide-step {
  display: flex;
  gap: 16px;
}
.guide-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.guide-step-num.purple { background: rgba(79,70,229,0.1); color: var(--primary); }
.guide-step-num.orange { background: rgba(249,115,22,0.1); color: var(--accent); }
.guide-step-content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}
.guide-step-content p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Requirements */
.req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.req-card {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  text-align: center;
}
.req-card h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 12px 0 4px;
}
.req-card p {
  font-size: 13px;
  color: var(--text-light);
}

/* Version Timeline */
.ver-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.ver-item {
  display: flex;
  gap: 20px;
  padding: 20px 24px;
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.ver-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-top: 4px;
  flex-shrink: 0;
}
.ver-dot.purple { background: var(--primary); }
.ver-dot.orange { background: var(--accent); }
.ver-dot.green { background: var(--success); }
.ver-content { flex: 1; }
.ver-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.ver-num {
  font-size: 16px;
  font-weight: 600;
}
.ver-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}
.ver-tag.stable { background: rgba(16,185,129,0.1); color: var(--success); }
.ver-tag.beta { background: rgba(249,115,22,0.1); color: var(--accent); }
.ver-date {
  font-size: 13px;
  color: var(--text-light);
  margin-left: auto;
}
.ver-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Article Page */
.article-hero {
  background: linear-gradient(180deg, var(--bg-cream) 0%, var(--bg-white) 100%);
  padding: 60px 24px;
}
.article-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.article-breadcrumb {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 20px;
}
.article-breadcrumb a { color: var(--primary); text-decoration: none; }
.article-hero h1 {
  font-size: 38px;
  font-weight: 700;
  margin-bottom: 16px;
  max-width: 700px;
}
.article-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
}

.keyword-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.keyword {
  padding: 6px 14px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.article-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 60px;
}
.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}
.article-body h2:first-child { margin-top: 0; }
.article-body p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}
.article-body ul, .article-body ol {
  margin: 16px 0;
  padding-left: 24px;
}
.article-body li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.inline-cta {
  background: linear-gradient(135deg, rgba(79,70,229,0.05), rgba(249,115,22,0.05));
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 28px;
  margin: 32px 0;
}
.inline-cta h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.inline-cta p {
  font-size: 14px;
  margin-bottom: 16px;
}

/* Sidebar */
.sidebar { position: sticky; top: 100px; }
.side-box {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 20px;
}
.side-box h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-download-btn {
  width: 100%;
  margin-bottom: 10px;
}
.side-download-btn:last-child { margin-bottom: 0; }
.side-toc {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.side-toc a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  transition: all 0.2s;
}
.side-toc a:hover {
  background: var(--bg-cream);
  color: var(--primary);
}
.side-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.side-stat {
  text-align: center;
  padding: 16px;
  background: var(--bg-cream);
  border-radius: 8px;
}
.side-stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}
.side-stat-label {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}
.side-security {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: rgba(16,185,129,0.08);
  border-radius: 8px;
  font-size: 13px;
  color: var(--success);
}

/* Tips Grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}
.tip-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.tip-num {
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}
.tip-card h5 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}
.tip-card p {
  font-size: 14px;
  margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 40px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .deep-row { grid-template-columns: 1fr; gap: 40px; }
  .deep-row.reverse { direction: ltr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .other-platforms { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { position: static; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
  }
  .hero { padding: 60px 20px; }
  .hero h1 { font-size: 32px; }
  .section { padding: 60px 20px; }
  .section-title { font-size: 28px; }
  .feature-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 24px; }
  .review-grid { grid-template-columns: 1fr; }
  .compare-table th, .compare-table td { padding: 12px 16px; font-size: 13px; }
  .deep-visual { padding: 20px; }
  .visual-bar-label { width: 60px; font-size: 11px; }
  .cta-banner { padding: 40px 24px; }
  .cta-banner h2 { font-size: 24px; }
  .dl-specs { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
}