/* === 第1套：科技蓝风格 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1e40af;
  --primary-dark: #1e3a8a;
  --accent: #3b82f6;
  --accent-light: #93c5fd;
  --bg: #f0f4ff;
  --bg-white: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #cbd5e1;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(30,64,175,0.10);
  --shadow-lg: 0 10px 40px rgba(30,64,175,0.18);
}

html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg-white); line-height: 1.7; }

/* ===== 导航 ===== */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(30,64,175,0.08);
}
nav { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; height: 64px; gap: 0; }
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-right: auto; }
.nav-logo-text { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
.nav-logo-sub { font-size: 11px; color: var(--text-muted); }
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a { display: block; padding: 8px 18px; text-decoration: none; color: var(--text-muted); border-radius: 8px; font-size: 15px; font-weight: 500; transition: color 0.2s, background 0.2s; }
.nav-links a:hover { color: var(--primary); background: var(--bg); }
.nav-links a.active { color: var(--primary); background: #dbeafe; font-weight: 700; }

/* ===== 通用 ===== */
main { padding-top: 64px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; }
.section-tag { display: inline-block; background: #dbeafe; color: var(--primary); font-size: 13px; font-weight: 700; border-radius: 100px; padding: 4px 16px; margin-bottom: 14px; letter-spacing: 0.5px; }
h2.section-title { font-size: 36px; font-weight: 800; color: var(--text); margin-bottom: 16px; line-height: 1.3; }
p.section-sub { font-size: 17px; color: var(--text-muted); max-width: 640px; margin: 0 auto 48px; }
.text-center { text-align: center; }

/* ===== Hero ===== */
.hero { background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 40%, #2563eb 70%, #3b82f6 100%); color: #fff; padding: 120px 0 100px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -60px; right: -80px; width: 500px; height: 500px; background: rgba(255,255,255,0.05); border-radius: 50%; }
.hero::after { content: ''; position: absolute; bottom: -100px; left: -60px; width: 400px; height: 400px; background: rgba(255,255,255,0.04); border-radius: 50%; }
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25); border-radius: 100px; padding: 6px 20px; font-size: 13px; margin-bottom: 28px; color: rgba(255,255,255,0.9); }
.hero h1 { font-size: clamp(36px, 5vw, 64px); font-weight: 900; line-height: 1.15; margin-bottom: 20px; text-shadow: 0 2px 20px rgba(0,0,0,0.15); }
.hero-sub { font-size: 20px; color: rgba(255,255,255,0.85); margin-bottom: 40px; max-width: 580px; margin-left: auto; margin-right: auto; }
.btn-hero { display: inline-flex; align-items: center; gap: 10px; background: #fff; color: var(--primary); font-size: 18px; font-weight: 700; padding: 16px 44px; border-radius: 100px; border: none; cursor: pointer; box-shadow: 0 8px 30px rgba(0,0,0,0.2); transition: transform 0.2s, box-shadow 0.2s; }
.btn-hero:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(0,0,0,0.25); }
.hero-meta { margin-top: 22px; font-size: 13px; color: rgba(255,255,255,0.65); }
.hero-platforms { display: flex; gap: 16px; justify-content: center; margin-top: 44px; flex-wrap: wrap; }
.hero-platform-btn { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25); color: #fff; border-radius: 10px; padding: 10px 20px; font-size: 14px; cursor: pointer; transition: background 0.2s; }
.hero-platform-btn:hover { background: rgba(255,255,255,0.22); }

/* ===== 统计 ===== */
.stats { background: var(--primary); padding: 48px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat-item { text-align: center; padding: 20px; border-right: 1px solid rgba(255,255,255,0.15); }
.stat-item:last-child { border-right: none; }
.stat-num { font-size: 40px; font-weight: 900; color: #fff; line-height: 1; }
.stat-label { font-size: 14px; color: rgba(255,255,255,0.75); margin-top: 6px; }

/* ===== 特性卡片 ===== */
.features { background: #f8faff; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: #fff; border-radius: var(--radius); padding: 32px 28px; box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s; border: 1px solid rgba(203,213,225,0.5); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { width: 52px; height: 52px; background: #dbeafe; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.feature-icon svg { width: 28px; height: 28px; color: var(--primary); fill: var(--primary); }
.feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.feature-card p { font-size: 15px; color: var(--text-muted); line-height: 1.7; }

/* ===== 产品详情 ===== */
.product-detail { background: #fff; }
.detail-row { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 80px; }
.detail-row:last-child { margin-bottom: 0; }
.detail-row.reverse { direction: rtl; }
.detail-row.reverse > * { direction: ltr; }
.detail-visual { background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%); border-radius: 20px; height: 320px; display: flex; align-items: center; justify-content: center; }
.detail-content h2 { font-size: 28px; font-weight: 800; margin-bottom: 16px; }
.detail-content p { color: var(--text-muted); margin-bottom: 14px; font-size: 16px; }
.detail-points { list-style: none; }
.detail-points li { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; font-size: 15px; color: var(--text-muted); }
.detail-points li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); margin-top: 8px; flex-shrink: 0; }

/* ===== 多平台 ===== */
.platforms { background: var(--bg); }
.platforms-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.platform-card { background: #fff; border-radius: var(--radius); padding: 32px 24px; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--border); }
.platform-card svg { width: 48px; height: 48px; margin-bottom: 14px; }
.platform-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.platform-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
.btn-dl { display: block; background: var(--primary); color: #fff; border: none; border-radius: 10px; padding: 12px 0; font-size: 15px; font-weight: 600; cursor: pointer; transition: background 0.2s; width: 100%; }
.btn-dl:hover { background: var(--primary-dark); }

/* ===== 评价 ===== */
.reviews { background: #fff; }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card { background: #f8faff; border-radius: var(--radius); padding: 28px 24px; border: 1px solid var(--border); }
.review-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.review-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--primary); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 18px; }
.review-info h4 { font-size: 15px; font-weight: 700; }
.review-info span { font-size: 13px; color: var(--text-muted); }
.stars { display: flex; gap: 2px; margin-bottom: 10px; }
.stars svg { width: 18px; height: 18px; fill: #f59e0b; }
.review-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== 对比表 ===== */
.compare { background: #f8faff; }
.compare-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare-table th { background: var(--primary); color: #fff; padding: 16px 24px; font-size: 15px; text-align: left; }
.compare-table th:first-child { border-radius: 0; }
.compare-table td { padding: 14px 24px; border-bottom: 1px solid var(--border); font-size: 15px; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:nth-child(even) td { background: #f8faff; }
.badge-yes { color: #16a34a; font-weight: 700; }
.badge-no { color: #dc2626; font-weight: 700; }
.badge-partial { color: #d97706; font-weight: 600; }

/* ===== FAQ ===== */
.faq { background: #fff; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; }
.faq-q { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; cursor: pointer; background: #fff; font-size: 16px; font-weight: 600; color: var(--text); user-select: none; }
.faq-q svg { width: 20px; height: 20px; fill: var(--primary); transition: transform 0.3s; flex-shrink: 0; }
.faq-item input[type="checkbox"] { display: none; }
.faq-item input:checked ~ .faq-q svg { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-item input:checked ~ .faq-a { max-height: 300px; }
.faq-a-inner { padding: 0 24px 20px; font-size: 15px; color: var(--text-muted); line-height: 1.75; }

/* ===== 页脚 ===== */
footer { background: #0f172a; color: rgba(255,255,255,0.65); padding: 48px 0 24px; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.footer-logo { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 8px; }
.footer-desc { font-size: 14px; margin-bottom: 28px; max-width: 600px; }
.footer-links { display: flex; gap: 24px; margin-bottom: 28px; flex-wrap: wrap; }
.footer-links a { color: rgba(255,255,255,0.55); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; }
.footer-security { display: flex; align-items: flex-start; gap: 10px; background: rgba(255,255,255,0.05); border-radius: 10px; padding: 14px 18px; margin-bottom: 16px; font-size: 14px; }
.footer-security svg { width: 18px; height: 18px; fill: #4ade80; flex-shrink: 0; margin-top: 2px; }
.footer-copy { font-size: 13px; color: rgba(255,255,255,0.4); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .features-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-row { grid-template-columns: 1fr; gap: 32px; }
  .detail-row.reverse { direction: ltr; }
}
@media (max-width: 600px) {
  .features-grid, .reviews-grid, .platforms-grid, .stats-grid { grid-template-columns: 1fr; }
  nav { padding: 0 16px; }
  .container { padding: 0 16px; }
  section { padding: 56px 0; }
  h2.section-title { font-size: 26px; }
  .hero h1 { font-size: 32px; }
}
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ===== 下载页专用 ===== */
.dl-hero { background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%); color: #fff; padding: 80px 0 60px; text-align: center; }
.dl-hero h1 { font-size: 42px; font-weight: 900; margin-bottom: 14px; }
.dl-hero p { font-size: 18px; color: rgba(255,255,255,0.8); }
.dl-main-box { background: #fff; border-radius: 20px; box-shadow: 0 8px 40px rgba(30,64,175,0.15); padding: 40px; margin: -40px auto 0; max-width: 700px; position: relative; z-index: 10; }
.dl-version { font-size: 14px; color: var(--text-muted); margin-bottom: 10px; }
.dl-main-btn { display: inline-flex; align-items: center; gap: 12px; background: var(--primary); color: #fff; border: none; border-radius: 14px; padding: 20px 48px; font-size: 20px; font-weight: 700; cursor: pointer; transition: background 0.2s, transform 0.2s; margin-bottom: 14px; }
.dl-main-btn:hover { background: var(--primary-dark); transform: translateY(-2px); }
.dl-meta { font-size: 14px; color: var(--text-muted); }
.dl-platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.dl-platform-card { background: #fff; border: 2px solid var(--border); border-radius: 16px; padding: 28px 20px; transition: border-color 0.2s, box-shadow 0.2s; }
.dl-platform-card:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.dl-platform-card h3 { font-size: 17px; font-weight: 700; margin: 12px 0 6px; }
.dl-platform-card .ver { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.dl-platform-card .req { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.install-steps { counter-reset: step; }
.install-step { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 18px; }
.step-num { width: 30px; height: 30px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; flex-shrink: 0; }
.step-content h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.step-content p { font-size: 14px; color: var(--text-muted); }
.sysreq-table { width: 100%; border-collapse: collapse; }
.sysreq-table th { background: var(--bg); padding: 12px 16px; font-size: 14px; text-align: left; border-bottom: 2px solid var(--border); }
.sysreq-table td { padding: 12px 16px; font-size: 14px; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.changelog-item { border-left: 3px solid var(--accent); padding-left: 20px; margin-bottom: 24px; }
.changelog-item h4 { font-size: 15px; font-weight: 700; color: var(--primary); }
.changelog-item .date { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.changelog-item ul { list-style: disc; padding-left: 18px; font-size: 14px; color: var(--text-muted); }
.changelog-item ul li { margin-bottom: 4px; }
.security-box { background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: var(--radius); padding: 24px 28px; display: flex; gap: 16px; align-items: flex-start; }
.security-box svg { width: 28px; height: 28px; fill: #16a34a; flex-shrink: 0; margin-top: 2px; }
.security-box h3 { font-size: 16px; font-weight: 700; color: #15803d; margin-bottom: 6px; }
.security-box p { font-size: 14px; color: #166534; }

/* ===== 中文页专用 ===== */
.zhhero { background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%); color: #fff; padding: 80px 0 60px; text-align: center; }
.article-body { max-width: 860px; margin: 0 auto; }
.article-body h2 { font-size: 26px; font-weight: 800; margin: 40px 0 14px; color: var(--text); }
.article-body p { font-size: 16px; color: var(--text-muted); margin-bottom: 16px; line-height: 1.85; }
.article-body ul, .article-body ol { padding-left: 20px; margin-bottom: 16px; }
.article-body li { font-size: 15px; color: var(--text-muted); margin-bottom: 8px; line-height: 1.7; }
.cta-box { background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%); border-radius: 20px; padding: 48px; text-align: center; color: #fff; margin-top: 60px; }
.cta-box h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 28px; }
.cta-btn { display: inline-block; background: #fff; color: var(--primary); font-size: 17px; font-weight: 700; padding: 14px 44px; border-radius: 100px; text-decoration: none; transition: transform 0.2s; }
.cta-btn:hover { transform: translateY(-2px); }