/* ===== Blueprint Theme: Chrome Blueprint Studio ===== */
/* Color Palette: Deep Navy + Electric Cyan + Grid Paper */
:root {
  --navy: #0a1628;
  --navy2: #0d1f3c;
  --navy3: #112240;
  --cyan: #00d4ff;
  --cyan2: #00b8d9;
  --cyan3: #0099b8;
  --green: #00e676;
  --amber: #ffb300;
  --white: #ffffff;
  --gray1: #e8f4f8;
  --gray2: #b8d4e0;
  --gray3: #6b8fa3;
  --text: #1a2e42;
  --border: rgba(0, 212, 255, 0.2);
  --card-bg: rgba(255,255,255,0.97);
  --grid-color: rgba(0, 212, 255, 0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: #f0f6fa;
  line-height: 1.7;
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes fadeUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
@keyframes gridPulse { 0%,100% { opacity:0.4; } 50% { opacity:0.8; } }
@keyframes scanLine { from { top: 0%; } to { top: 100%; } }
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0.3; } }
@keyframes shimmer { from { background-position: -200% center; } to { background-position: 200% center; } }

/* ===== NAVIGATION ===== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navy);
  border-bottom: 2px solid var(--cyan);
  box-shadow: 0 2px 20px rgba(0,212,255,0.15);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 64px;
  gap: 8px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  margin-right: auto;
  letter-spacing: 0.02em;
}
.nav-logo-icon {
  width: 32px; height: 32px;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  display: block;
  padding: 6px 16px;
  color: var(--gray2);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  letter-spacing: 0.02em;
}
.nav-links a:hover { color: var(--cyan); background: rgba(0,212,255,0.08); }
.nav-links a.active {
  color: var(--navy);
  background: var(--cyan);
  font-weight: 600;
}
.nav-dl-btn {
  margin-left: 12px;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--cyan), var(--cyan2));
  color: var(--navy) !important;
  border-radius: 6px;
  font-weight: 700 !important;
  font-size: 0.88rem !important;
  cursor: pointer;
  border: none;
  transition: transform 0.15s, box-shadow 0.15s;
}
.nav-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,212,255,0.4); }

/* ===== BLUEPRINT HERO ===== */
.hero {
  background: var(--navy);
  position: relative;
  overflow: hidden;
  padding: 100px 24px 80px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridPulse 4s ease-in-out infinite;
}
.hero::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  animation: scanLine 3s linear infinite;
  opacity: 0.6;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,212,255,0.12);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero-badge span { animation: blink 2s ease-in-out infinite; }
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: normal;
  color: var(--cyan);
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--gray2);
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--cyan);
  color: var(--navy);
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  text-decoration: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,212,255,0.35); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: transparent;
  color: var(--cyan);
  border: 1.5px solid var(--cyan);
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}
.btn-outline:hover { background: rgba(0,212,255,0.1); }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(0,212,255,0.2);
}
.hero-stat-val {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--cyan);
  display: block;
}
.hero-stat-lbl { font-size: 0.8rem; color: var(--gray3); }

/* Blueprint Panel (right side of hero) */
.blueprint-panel {
  background: rgba(0,20,40,0.8);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 12px;
  padding: 28px;
  position: relative;
  backdrop-filter: blur(8px);
}
.bp-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(0,212,255,0.2);
}
.bp-dot { width: 10px; height: 10px; border-radius: 50%; }
.bp-dot.red { background: #ff5f57; }
.bp-dot.yellow { background: #ffbd2e; }
.bp-dot.green { background: #28c941; }
.bp-title { color: var(--gray3); font-size: 0.78rem; margin-left: auto; font-family: monospace; }
.bp-metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(0,212,255,0.1);
}
.bp-metric-label { color: var(--gray3); font-size: 0.82rem; font-family: monospace; }
.bp-metric-value { color: var(--cyan); font-weight: 700; font-family: monospace; font-size: 0.9rem; }
.bp-bar-wrap { margin-top: 20px; }
.bp-bar-label { display: flex; justify-content: space-between; color: var(--gray3); font-size: 0.75rem; font-family: monospace; margin-bottom: 6px; }
.bp-bar-track { background: rgba(0,212,255,0.1); border-radius: 3px; height: 6px; overflow: hidden; margin-bottom: 10px; }
.bp-bar-fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--cyan3), var(--cyan)); transition: width 0.6s; }
.bp-tag {
  display: inline-block;
  background: rgba(0,230,118,0.12);
  color: var(--green);
  border: 1px solid rgba(0,230,118,0.3);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 3px;
  font-family: monospace;
  margin-top: 12px;
}

/* ===== SECTIONS ===== */
section { padding: 80px 24px; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan3);
  margin-bottom: 12px;
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 20px; height: 2px;
  background: var(--cyan3);
}
.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-desc { font-size: 1rem; color: var(--gray3); max-width: 560px; line-height: 1.8; }

/* ===== FEATURES GRID ===== */
.features-bg { background: var(--navy); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.15);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 48px;
}
.feature-card {
  background: var(--navy2);
  padding: 32px 28px;
  position: relative;
  transition: background 0.2s;
}
.feature-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.feature-card:hover { background: var(--navy3); }
.feature-card:hover::after { transform: scaleX(1); }
.feature-icon {
  width: 48px; height: 48px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { color: var(--cyan); }
.feature-card h3 { color: var(--white); font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--gray3); font-size: 0.9rem; line-height: 1.7; }
.features-title { color: var(--white); }
.features-desc { color: var(--gray2); }

/* ===== STATS BAND ===== */
.stats-band { background: linear-gradient(135deg, var(--navy) 0%, #0a2a4a 100%); border-top: 1px solid rgba(0,212,255,0.15); border-bottom: 1px solid rgba(0,212,255,0.15); padding: 60px 24px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; max-width: 1200px; margin: 0 auto; }
.stat-box { text-align: center; }
.stat-num {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label { color: var(--gray2); font-size: 0.88rem; }
.stat-sub { color: var(--gray3); font-size: 0.75rem; margin-top: 4px; }

/* ===== DEEP DIVE SECTION ===== */
.deep-dive { background: #f0f6fa; }
.deep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 72px;
}
.deep-row:last-child { margin-bottom: 0; }
.deep-row.reverse { direction: rtl; }
.deep-row.reverse > * { direction: ltr; }
.deep-visual {
  background: var(--navy);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 12px;
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.deep-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}
.deep-visual-content { position: relative; z-index: 1; }
.deep-tag {
  display: inline-block;
  background: rgba(0,212,255,0.1);
  color: var(--cyan);
  font-size: 0.75rem;
  font-family: monospace;
  padding: 3px 10px;
  border-radius: 3px;
  border: 1px solid rgba(0,212,255,0.2);
  margin-bottom: 16px;
}
.deep-number {
  font-size: 5rem;
  font-weight: 900;
  color: rgba(0,212,255,0.12);
  line-height: 1;
  margin-bottom: 8px;
  font-family: monospace;
}
.deep-big-text { font-size: 1.8rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.deep-sub { color: var(--gray3); font-size: 0.85rem; font-family: monospace; }
.deep-content h3 { font-size: 1.5rem; font-weight: 700; color: var(--navy); margin-bottom: 14px; }
.deep-content p { color: #4a6278; font-size: 0.95rem; line-height: 1.85; margin-bottom: 14px; }
.deep-list { list-style: none; margin-top: 16px; }
.deep-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: #4a6278;
}
.deep-list li::before {
  content: '▶';
  color: var(--cyan3);
  font-size: 0.6rem;
  margin-top: 5px;
  flex-shrink: 0;
}

/* ===== PLATFORM DOWNLOAD SECTION ===== */
.platforms-bg { background: var(--navy); }
.platforms-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 16px; margin-top: 48px; }
.platform-card {
  background: var(--navy2);
  border: 1px solid rgba(0,212,255,0.15);
  border-radius: 10px;
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.platform-card:hover { border-color: var(--cyan); transform: translateY(-3px); }
.platform-card.featured {
  background: linear-gradient(160deg, #0d2040 0%, #0a1628 100%);
  border-color: var(--cyan);
  position: relative;
  overflow: hidden;
}
.platform-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 16px; right: 16px;
  background: var(--cyan);
  color: var(--navy);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 3px;
}
.platform-icon { width: 44px; height: 44px; margin-bottom: 16px; }
.platform-card h3 { color: var(--white); font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.platform-card p { color: var(--gray3); font-size: 0.83rem; line-height: 1.6; margin-bottom: 16px; }
.platform-info { font-size: 0.77rem; color: var(--gray3); font-family: monospace; margin-bottom: 14px; }
.platform-info span { color: var(--cyan2); }
.btn-dl {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  background: var(--cyan);
  color: var(--navy);
  border: none;
  border-radius: 5px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s;
  width: 100%;
  justify-content: center;
}
.btn-dl:hover { opacity: 0.85; }
.btn-dl-outline {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  background: transparent;
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.4);
  border-radius: 5px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  width: 100%;
  justify-content: center;
}
.btn-dl-outline:hover { background: rgba(0,212,255,0.08); }

/* ===== COMPARE TABLE ===== */
.compare-bg { background: #f0f6fa; }
.compare-table { width: 100%; border-collapse: collapse; margin-top: 40px; font-size: 0.88rem; }
.compare-table th {
  background: var(--navy);
  color: var(--white);
  padding: 14px 18px;
  text-align: center;
  font-weight: 600;
}
.compare-table th:first-child { text-align: left; border-radius: 8px 0 0 0; }
.compare-table th:last-child { border-radius: 0 8px 0 0; }
.compare-table th.highlight { color: var(--cyan); }
.compare-table td { padding: 13px 18px; border-bottom: 1px solid #dde8f0; text-align: center; }
.compare-table td:first-child { text-align: left; font-weight: 500; color: var(--text); }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:nth-child(even) td { background: #f8fbfd; }
.check { color: #00c853; font-size: 1.1rem; }
.cross { color: #ef5350; font-size: 1.1rem; }
.partial { color: var(--amber); font-size: 0.8rem; }

/* ===== REVIEWS ===== */
.reviews-bg { background: var(--navy); }
.reviews-title { color: var(--white); }
.reviews-desc { color: var(--gray2); }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.review-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(0,212,255,0.12);
  border-left: 3px solid var(--cyan);
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s;
}
.review-card:hover { border-left-color: var(--green); }
.review-stars { color: var(--amber); font-size: 0.9rem; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { color: var(--gray2); font-size: 0.88rem; line-height: 1.75; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan3), var(--navy3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--white);
  font-size: 0.85rem;
  flex-shrink: 0;
}
.review-name { color: var(--white); font-size: 0.85rem; font-weight: 600; }
.review-role { color: var(--gray3); font-size: 0.75rem; }

/* ===== FAQ ===== */
.faq-bg { background: #f0f6fa; }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; margin-top: 48px; }
.faq-item { border-bottom: 1px solid #dde8f0; }
.faq-q {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 18px 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color 0.2s;
}
.faq-q:hover { color: var(--cyan3); }
.faq-q .faq-arrow { width: 20px; height: 20px; transition: transform 0.3s; flex-shrink: 0; color: var(--cyan3); }
.faq-q.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding: 0 0 18px;
  font-size: 0.88rem;
  color: #4a6278;
  line-height: 1.8;
}
.faq-a.open { display: block; }

/* ===== CTA BANNER ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--navy) 0%, #0a2a4a 60%, var(--navy3) 100%);
  border-top: 1px solid rgba(0,212,255,0.2);
  border-bottom: 1px solid rgba(0,212,255,0.2);
  padding: 80px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 30% 50%, rgba(0,212,255,0.06) 0%, transparent 60%),
    radial-gradient(circle at 70% 50%, rgba(0,230,118,0.04) 0%, transparent 60%);
}
.cta-banner h2 { font-size: 2.2rem; font-weight: 800; color: var(--white); margin-bottom: 14px; position: relative; }
.cta-banner p { color: var(--gray2); font-size: 1rem; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; position: relative; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; }

/* ===== FOOTER ===== */
footer {
  background: #070f1c;
  border-top: 1px solid rgba(0,212,255,0.1);
  padding: 32px 24px;
  text-align: center;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-safe {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--green);
  font-size: 0.85rem;
  margin-bottom: 10px;
}
.footer-copy { color: var(--gray3); font-size: 0.78rem; line-height: 1.6; }

/* ===== DOWNLOAD PAGE SPECIFICS ===== */
.dl-hero {
  background: var(--navy);
  padding: 80px 24px 60px;
  position: relative;
  overflow: hidden;
}
.dl-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}
.dl-hero-inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
.dl-hero h1 { color: var(--white); font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; }
.dl-hero p { color: var(--gray2); font-size: 1rem; }
.dl-main-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 40px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.08);
}
.dl-main-info h2 { font-size: 1.5rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.dl-main-info p { color: #4a6278; font-size: 0.9rem; margin-bottom: 20px; line-height: 1.75; }
.dl-meta { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 24px; }
.dl-meta-item { font-size: 0.8rem; color: var(--gray3); }
.dl-meta-item strong { color: var(--navy); display: block; font-size: 0.88rem; }
.dl-main-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--cyan);
  color: var(--navy);
  border: none;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: transform 0.15s, box-shadow 0.2s;
}
.dl-main-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,212,255,0.3); }
.dl-specs { background: var(--navy); border-radius: 8px; padding: 24px; }
.dl-spec-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px dashed rgba(0,212,255,0.1); font-size: 0.85rem; }
.dl-spec-row:last-child { border-bottom: none; }
.dl-spec-label { color: var(--gray3); font-family: monospace; }
.dl-spec-val { color: var(--cyan); font-family: monospace; font-weight: 600; }
.platforms-other { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.platform-other-card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 28px 24px;
  border: 1px solid #dde8f0;
  transition: border-color 0.2s;
}
.platform-other-card:hover { border-color: var(--cyan3); }
.platform-other-card h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin: 14px 0 8px; }
.platform-other-card p { font-size: 0.83rem; color: #4a6278; line-height: 1.6; margin-bottom: 16px; }
.sysreq-section { background: #f0f6fa; padding: 60px 24px; }
.sysreq-tabs { display: flex; gap: 4px; margin-bottom: 28px; }
.sysreq-tab {
  padding: 8px 20px;
  background: none;
  border: 1px solid #c8d8e4;
  border-radius: 5px;
  font-size: 0.88rem;
  color: var(--gray3);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.sysreq-tab.active { background: var(--navy); color: var(--white); border-color: var(--navy); }
.sysreq-panel { display: none; }
.sysreq-panel.active { display: block; }
.sysreq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.sysreq-item { background: var(--card-bg); border-radius: 8px; padding: 18px 20px; border-left: 3px solid var(--cyan3); }
.sysreq-item h4 { font-size: 0.85rem; color: var(--navy); font-weight: 700; margin-bottom: 6px; }
.sysreq-item p { font-size: 0.83rem; color: #4a6278; }
.install-guide { background: var(--card-bg); border-radius: 12px; padding: 40px; margin-top: 32px; box-shadow: 0 2px 16px rgba(0,0,0,0.06); }
.install-guide h3 { font-size: 1.3rem; font-weight: 700; color: var(--navy); margin-bottom: 24px; }
.install-step { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }
.install-step:last-child { margin-bottom: 0; }
.step-num {
  width: 36px; height: 36px;
  background: var(--navy);
  color: var(--cyan);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
  font-family: monospace;
}
.step-content h4 { font-size: 0.95rem; font-weight: 600; color: var(--navy); margin-bottom: 5px; }
.step-content p { font-size: 0.85rem; color: #4a6278; line-height: 1.7; }
.changelog-section { background: var(--navy); padding: 60px 24px; }
.changelog-title { color: var(--white); }
.changelog-desc { color: var(--gray2); }
.changelog-list { margin-top: 32px; }
.changelog-item { border-left: 2px solid rgba(0,212,255,0.2); padding: 20px 0 20px 24px; position: relative; }
.changelog-item::before { content: ''; position: absolute; left: -5px; top: 24px; width: 8px; height: 8px; background: var(--cyan); border-radius: 50%; }
.changelog-ver { display: flex; gap: 12px; align-items: center; margin-bottom: 8px; }
.cl-ver { font-size: 0.9rem; font-weight: 700; color: var(--cyan); font-family: monospace; }
.cl-date { font-size: 0.78rem; color: var(--gray3); font-family: monospace; }
.cl-tag { font-size: 0.7rem; background: rgba(0,230,118,0.15); color: var(--green); padding: 1px 6px; border-radius: 3px; border: 1px solid rgba(0,230,118,0.3); }
.changelog-item h4 { color: var(--white); font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; }
.changelog-item ul { list-style: none; }
.changelog-item ul li { color: var(--gray3); font-size: 0.83rem; padding: 3px 0; }
.changelog-item ul li::before { content: '— '; color: var(--cyan3); }

/* ===== ZH-CN PAGE ===== */
.article-hero {
  background: var(--navy);
  padding: 72px 24px 60px;
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
}
.article-hero-inner { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.breadcrumb { font-size: 0.8rem; color: var(--gray3); margin-bottom: 16px; font-family: monospace; }
.breadcrumb a { color: var(--cyan3); text-decoration: none; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { margin: 0 6px; }
.article-hero h1 { font-size: 2.2rem; font-weight: 800; color: var(--white); margin-bottom: 14px; line-height: 1.3; }
.article-meta { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.article-meta-item { font-size: 0.78rem; color: var(--gray3); display: flex; align-items: center; gap: 5px; }
.tag-cloud { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.tag { display: inline-block; background: rgba(0,212,255,0.1); color: var(--cyan2); font-size: 0.75rem; padding: 4px 10px; border-radius: 20px; border: 1px solid rgba(0,212,255,0.2); font-family: monospace; }
.article-layout { max-width: 1200px; margin: 0 auto; padding: 60px 24px; display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; background: #f0f6fa; }
.article-main { min-width: 0; }
.article-section { margin-bottom: 52px; }
.article-section h2 { font-size: 1.4rem; font-weight: 700; color: var(--navy); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid rgba(0,212,255,0.2); }
.article-section h3 { font-size: 1.1rem; font-weight: 600; color: var(--navy); margin: 18px 0 10px; }
.article-section p { font-size: 0.93rem; color: #3a5568; line-height: 1.9; margin-bottom: 14px; }
.article-section ul, .article-section ol { padding-left: 20px; margin-bottom: 14px; }
.article-section li { font-size: 0.92rem; color: #3a5568; line-height: 1.8; margin-bottom: 6px; }
.article-tip {
  background: rgba(0,212,255,0.06);
  border-left: 3px solid var(--cyan3);
  padding: 14px 18px;
  border-radius: 0 6px 6px 0;
  margin: 16px 0;
  font-size: 0.88rem;
  color: #2a4a5e;
}
.toc-sidebar {
  position: sticky;
  top: 80px;
}
.toc-box {
  background: var(--card-bg);
  border: 1px solid #dde8f0;
  border-top: 3px solid var(--cyan3);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}
.toc-box h4 { font-size: 0.85rem; font-weight: 700; color: var(--navy); margin-bottom: 14px; letter-spacing: 0.05em; text-transform: uppercase; }
.toc-list { list-style: none; }
.toc-list li { margin-bottom: 6px; }
.toc-list a { font-size: 0.82rem; color: var(--gray3); text-decoration: none; display: flex; align-items: center; gap: 6px; padding: 3px 0; transition: color 0.2s; }
.toc-list a::before { content: '·'; color: var(--cyan3); }
.toc-list a:hover, .toc-list a.active { color: var(--cyan3); }
.dl-side-card {
  background: var(--navy);
  border-radius: 8px;
  padding: 22px;
  text-align: center;
}
.dl-side-card h4 { color: var(--white); font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.dl-side-card p { color: var(--gray3); font-size: 0.8rem; margin-bottom: 16px; }
.dl-side-btn {
  display: block;
  padding: 11px 20px;
  background: var(--cyan);
  color: var(--navy);
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none;
  text-align: center;
  transition: opacity 0.2s;
}
.dl-side-btn:hover { opacity: 0.85; }
.tricks-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 16px; }
.trick-card { background: var(--card-bg); border: 1px solid #dde8f0; border-radius: 8px; padding: 16px; }
.trick-card h4 { font-size: 0.88rem; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
.trick-card p { font-size: 0.82rem; color: #4a6278; line-height: 1.65; }
.cta-box {
  background: linear-gradient(135deg, var(--navy) 0%, #0a2a4a 100%);
  border-radius: 12px;
  padding: 40px;
  text-align: center;
  margin-top: 48px;
  border: 1px solid rgba(0,212,255,0.2);
}
.cta-box h3 { color: var(--white); font-size: 1.4rem; font-weight: 700; margin-bottom: 10px; }
.cta-box p { color: var(--gray2); font-size: 0.9rem; margin-bottom: 24px; }
.cta-box a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: var(--cyan);
  color: var(--navy);
  border-radius: 7px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.2s;
}
.cta-box a:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,212,255,0.35); }
.compare-section { margin-top: 32px; }
.compare-table th:first-child { border-radius: 0; }
.compare-table th:last-child { border-radius: 0; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-inner, .deep-row { grid-template-columns: 1fr; gap: 36px; }
  .deep-row.reverse { direction: ltr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-grid { grid-template-columns: 1fr; }
  .dl-main-card { grid-template-columns: 1fr; }
  .platforms-other { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .toc-sidebar { position: static; }
  .tricks-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .section-title { font-size: 1.6rem; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .nav-logo span { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .platforms-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .sysreq-grid { grid-template-columns: 1fr; }
  .nav-inner { padding: 0 16px; }
  .nav-links a { padding: 6px 10px; font-size: 0.82rem; }
}