/* Suite 1 - Indigo/Purple Gradient Theme */
:root {
  --pri: #4F46E5;
  --pri-dark: #3730A3;
  --pri-light: #EEF2FF;
  --acc: #7C3AED;
  --acc-light: #F5F3FF;
  --text: #111827;
  --text2: #6B7280;
  --text3: #9CA3AF;
  --border: #E5E7EB;
  --bg: #FFFFFF;
  --bg2: #F9FAFB;
  --r8: 8px;
  --r12: 12px;
  --r16: 16px;
  --shadow: 0 4px 24px rgba(79,70,229,0.12);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 20px;
  font-weight: 800;
  color: var(--pri);
  letter-spacing: -0.5px;
}
.nav-brand svg { width: 32px; height: 32px; }
.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  display: block;
  padding: 8px 18px;
  text-decoration: none;
  color: var(--text2);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--r8);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--pri); background: var(--pri-light); }
.nav-links a.active { color: var(--pri); background: var(--pri-light); font-weight: 600; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--pri);
  color: #fff;
  border: none;
  border-radius: var(--r8);
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--pri-dark); transform: translateY(-1px); }

/* Hero */
.hero {
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #A855F7 100%);
  color: #fff;
  text-align: center;
  padding: 96px 5% 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  opacity: 0.88;
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
}
.hero-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--pri);
  border: none;
  border-radius: var(--r12);
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}
.btn-hero-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.2); }
.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: var(--r12);
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  text-decoration: none;
}
.btn-hero-secondary:hover { background: rgba(255,255,255,0.25); }
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 2rem; font-weight: 800; }
.hero-stat-label { font-size: 13px; opacity: 0.8; margin-top: 2px; }

/* Section */
.section { padding: 72px 5%; }
.section-alt { background: var(--bg2); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  background: var(--pri-light);
  color: var(--pri);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.section-header h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; color: var(--text); margin-bottom: 14px; }
.section-header p { font-size: 1.05rem; color: var(--text2); max-width: 560px; margin: 0 auto; }

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r16);
  padding: 32px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.feature-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--pri-light);
  border-radius: var(--r12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 28px; height: 28px; color: var(--pri); }
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 0.93rem; color: var(--text2); line-height: 1.65; }

/* Platforms */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.platform-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r16);
  padding: 28px 24px;
  text-align: center;
  transition: box-shadow 0.2s;
}
.platform-card:hover { box-shadow: var(--shadow); }
.platform-card svg { width: 48px; height: 48px; margin-bottom: 14px; }
.platform-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.platform-card p { font-size: 0.88rem; color: var(--text2); margin-bottom: 18px; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--pri);
  color: #fff;
  border: none;
  border-radius: var(--r8);
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-download:hover { background: var(--pri-dark); }
.btn-download:disabled { opacity: 0.7; cursor: wait; }

/* Compare Table */
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th, .compare-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.93rem;
}
.compare-table th { font-weight: 700; background: var(--bg2); font-size: 0.85rem; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }
.compare-table tr:hover td { background: var(--pri-light); }
.check-yes { color: #16A34A; font-weight: 700; }
.check-no { color: #DC2626; }
.compare-wrap { overflow-x: auto; border-radius: var(--r12); border: 1px solid var(--border); }

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r16);
  padding: 28px;
}
.review-stars { color: #F59E0B; font-size: 18px; letter-spacing: 2px; margin-bottom: 12px; }
.review-text { font-size: 0.93rem; color: var(--text2); line-height: 1.65; margin-bottom: 16px; font-style: italic; }
.review-author { font-size: 0.88rem; font-weight: 600; color: var(--text); }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
  text-align: center;
}
.stat-item {
  padding: 32px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r16);
}
.stat-num { font-size: 2.4rem; font-weight: 900; color: var(--pri); margin-bottom: 6px; }
.stat-label { font-size: 0.93rem; color: var(--text2); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--r12);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  background: var(--bg);
  border: none;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}
.faq-question:hover { background: var(--pri-light); }
.faq-question.open { background: var(--pri-light); color: var(--pri); }
.faq-question svg { width: 20px; height: 20px; flex-shrink: 0; transition: transform 0.3s; }
.faq-question.open svg { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s;
  font-size: 0.93rem;
  color: var(--text2);
  line-height: 1.7;
}
.faq-answer.open { max-height: 400px; padding: 4px 24px 20px; }

/* Install steps */
.install-steps { counter-reset: step; }
.install-step {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.install-step:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.step-num {
  width: 40px;
  height: 40px;
  background: var(--pri);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
  counter-increment: step;
}
.step-content h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.step-content p { font-size: 0.9rem; color: var(--text2); }

/* Version history */
.version-list { max-width: 700px; }
.version-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.version-badge {
  background: var(--pri-light);
  color: var(--pri);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 100px;
  white-space: nowrap;
  height: fit-content;
}
.version-info h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; }
.version-info p { font-size: 0.88rem; color: var(--text2); }
.version-date { font-size: 0.82rem; color: var(--text3); margin-top: 4px; }

/* Info blocks */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.info-block {
  background: var(--bg2);
  border-radius: var(--r16);
  padding: 28px;
}
.info-block h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.info-block ul { list-style: none; }
.info-block li { font-size: 0.9rem; color: var(--text2); padding: 5px 0; display: flex; align-items: flex-start; gap: 8px; }
.info-block li::before { content: '•'; color: var(--pri); font-weight: 700; flex-shrink: 0; }

/* CTA */
.cta-section {
  background: linear-gradient(135deg, #4F46E5, #7C3AED);
  color: #fff;
  text-align: center;
  padding: 72px 5%;
}
.cta-section h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 16px; }
.cta-section p { font-size: 1.05rem; opacity: 0.88; margin-bottom: 32px; }

/* Download hero */
.dl-hero {
  background: linear-gradient(160deg, var(--pri-light) 0%, var(--acc-light) 100%);
  padding: 64px 5% 48px;
  text-align: center;
}
.dl-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 900; color: var(--text); margin-bottom: 12px; }
.dl-hero p { font-size: 1.05rem; color: var(--text2); margin-bottom: 32px; }
.dl-main-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--pri);
  color: #fff;
  border: none;
  border-radius: var(--r12);
  padding: 16px 40px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.dl-main-btn:hover { background: var(--pri-dark); transform: translateY(-2px); }
.dl-meta { font-size: 0.85rem; color: var(--text3); margin-top: 12px; }

/* Security badge */
.security-banner {
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  border-radius: var(--r12);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}
.security-banner svg { color: #059669; flex-shrink: 0; }
.security-banner p { font-size: 0.93rem; color: #065F46; }

/* ZH-CN page */
.article-content { max-width: 860px; margin: 0 auto; padding: 56px 5%; }
.article-content h1 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 900; margin-bottom: 20px; }
.article-content h2 { font-size: 1.4rem; font-weight: 700; margin: 36px 0 14px; color: var(--pri); }
.article-content h3 { font-size: 1.1rem; font-weight: 700; margin: 24px 0 10px; }
.article-content p { font-size: 0.98rem; color: var(--text2); line-height: 1.8; margin-bottom: 14px; }
.article-content ul { padding-left: 20px; margin-bottom: 14px; }
.article-content li { font-size: 0.95rem; color: var(--text2); line-height: 1.8; margin-bottom: 6px; }
.article-cta {
  background: linear-gradient(135deg, var(--pri-light), var(--acc-light));
  border: 2px solid var(--pri);
  border-radius: var(--r16);
  padding: 40px;
  text-align: center;
  margin: 48px 0;
}
.article-cta h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 12px; }
.article-cta p { color: var(--text2); margin-bottom: 24px; }
.btn-cta-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--pri);
  color: #fff;
  border-radius: var(--r12);
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s;
}
.btn-cta-link:hover { background: var(--pri-dark); }

/* Footer */
.footer {
  background: #1F2937;
  color: #9CA3AF;
  padding: 40px 5% 24px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.footer-brand { color: #F9FAFB; font-size: 18px; font-weight: 800; margin-bottom: 8px; }
.footer-desc { font-size: 0.88rem; max-width: 360px; line-height: 1.6; }
.footer-links { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.footer-links a { color: #9CA3AF; text-decoration: none; font-size: 0.88rem; hover: color: #fff; }
.footer-links a:hover { color: #F9FAFB; }
.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 20px;
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-security {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #6EE7B7;
  font-size: 0.85rem;
  margin-bottom: 8px;
}