/* ===== WPS Office - Corporate Blue Theme ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --secondary: #64748b;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --radius: 12px;
  --max-width: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
header {
  background: var(--card-bg);
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  position: sticky; top: 0; z-index: 100;
}
nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 22px; font-weight: 800; color: var(--primary);
  text-decoration: none;
}
.nav-links { display: flex; gap: 8px; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--text-light);
  font-size: 15px; font-weight: 500;
  padding: 8px 18px; border-radius: 8px;
  transition: all 0.3s;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #bfdbfe 100%);
  padding: 100px 0 80px;
}
.hero .container {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: center;
}
.hero h1 {
  font-size: 48px; font-weight: 800; line-height: 1.15;
  color: var(--text); margin-bottom: 20px;
}
.hero h1 span { color: var(--primary); }
.hero p {
  font-size: 18px; color: var(--text-light);
  margin-bottom: 32px; line-height: 1.7;
}
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--primary); color: #fff;
  padding: 16px 36px; border-radius: 10px;
  font-size: 17px; font-weight: 600;
  border: none; cursor: pointer; text-decoration: none;
  transition: all 0.3s; box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--primary);
  padding: 14px 28px; border-radius: 10px;
  font-size: 15px; font-weight: 600;
  border: 2px solid var(--primary); cursor: pointer;
  text-decoration: none; transition: all 0.3s; margin-left: 12px;
}
.btn-secondary:hover { background: var(--primary-light); }
.hero-visual {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 20px; padding: 40px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  box-shadow: var(--shadow);
}
.hero-card {
  background: rgba(255,255,255,0.95); border-radius: 12px;
  padding: 20px; text-align: center;
}
.hero-card svg { margin-bottom: 8px; }
.hero-card span { font-size: 13px; font-weight: 600; color: var(--text); }
section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 36px; font-weight: 700; margin-bottom: 16px; }
.section-header p { font-size: 17px; color: var(--text-light); max-width: 600px; margin: 0 auto; }
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 36px 28px; box-shadow: var(--shadow);
  border: 1px solid var(--border); transition: all 0.3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.12); }
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.platforms { background: linear-gradient(180deg, #f1f5f9 0%, var(--bg) 100%); }
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.platform-card {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 32px 24px; text-align: center;
  box-shadow: var(--shadow); border: 1px solid var(--border); transition: all 0.3s;
}
.platform-card:hover { transform: translateY(-4px); }
.platform-card svg { margin-bottom: 16px; }
.platform-card h4 { font-size: 17px; margin-bottom: 8px; }
.platform-card p { font-size: 13px; color: var(--text-light); margin-bottom: 16px; }
.btn-download {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary); color: #fff;
  padding: 10px 20px; border-radius: 8px;
  font-size: 14px; font-weight: 600; border: none;
  cursor: pointer; transition: all 0.3s;
}
.btn-download:hover { background: var(--primary-dark); }
.detail-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center; margin-bottom: 60px;
}
.detail-grid.reverse { direction: rtl; }
.detail-grid.reverse > * { direction: ltr; }
.detail-content h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.detail-content p { color: var(--text-light); line-height: 1.8; margin-bottom: 12px; }
.detail-visual {
  background: linear-gradient(135deg, var(--primary-light), #dbeafe);
  border-radius: 16px; padding: 40px;
  display: flex; align-items: center; justify-content: center;
  min-height: 280px;
}
.reviews { background: #f1f5f9; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.stars { color: #f59e0b; font-size: 16px; margin-bottom: 12px; letter-spacing: 2px; }
.review-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 16px; }
.reviewer { display: flex; align-items: center; gap: 12px; }
.reviewer-avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 16px;
}
.reviewer-name { font-weight: 600; font-size: 14px; }
.reviewer-role { font-size: 12px; color: var(--text-light); }
.stats-bar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 60px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }
.stat-number { font-size: 42px; font-weight: 800; color: #fff; }
.stat-label { font-size: 15px; color: rgba(255,255,255,0.8); margin-top: 8px; }
.comparison-table {
  width: 100%; border-collapse: collapse;
  background: var(--card-bg); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
}
.comparison-table th {
  background: var(--primary); color: #fff;
  padding: 16px 24px; text-align: left; font-weight: 600;
}
.comparison-table td { padding: 16px 24px; border-bottom: 1px solid var(--border); }
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:nth-child(even) { background: #f8fafc; }
.check { color: #059669; font-weight: 700; }
.cross { color: #dc2626; }
.faq-item {
  background: var(--card-bg); border-radius: var(--radius);
  margin-bottom: 16px; box-shadow: var(--shadow);
  border: 1px solid var(--border); overflow: hidden;
}
.faq-question {
  padding: 20px 24px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 16px; transition: background 0.3s;
}
.faq-question:hover { background: #f8fafc; }
.faq-answer { padding: 0 24px 20px; color: var(--text-light); line-height: 1.7; font-size: 14px; }
footer {
  background: var(--text); color: rgba(255,255,255,0.7);
  padding: 40px 0; text-align: center; font-size: 13px;
}
footer p { margin-bottom: 6px; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@media (max-width: 768px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .features-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 4px; }
  .nav-links a { padding: 6px 12px; font-size: 13px; }
}