/* ============================================================
   蝙蝠聊天官网 - 主样式表
   BatChat Official Website - Main Stylesheet
   版本: 1.0.0 | 更新: 2026
   ============================================================ */

/* ===== CSS 变量 ===== */
:root {
  --color-primary: #1a6ef5;
  --color-primary-dark: #0f52c4;
  --color-primary-light: #4d8ff8;
  --color-secondary: #00c896;
  --color-secondary-dark: #00a07a;
  --color-accent: #6c3de8;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7fd;
  --color-bg-dark: #0d1b3e;
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-border: #e5e9f2;
  --color-shadow: rgba(26, 110, 245, 0.12);
  --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --border-radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(26, 110, 245, 0.1);
  --shadow-lg: 0 8px 40px rgba(26, 110, 245, 0.15);
  --container-max: 1200px;
  --container-pad: 24px;
  --header-height: 70px;
}

/* ===== 重置 & 基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: var(--font-size-base); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--line-height-base);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ===== 容器 ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ===== 顶部公告栏 ===== */
.top-notice {
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  text-align: center;
  padding: 10px 20px;
  font-size: 14px;
  position: relative;
  z-index: 100;
}
.top-notice .container { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }
.notice-tag {
  background: rgba(255,255,255,0.25);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.notice-link {
  color: #fff;
  font-weight: 600;
  border-bottom: 1px solid rgba(255,255,255,0.6);
  padding-bottom: 1px;
}
.notice-link:hover { color: #fff; border-bottom-color: #fff; }

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.navbar { height: var(--header-height); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 20px;
}
.nav-logo img { height: 38px; width: auto; }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background: rgba(26, 110, 245, 0.08);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.btn-download-nav {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  padding: 9px 20px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition);
  box-shadow: 0 2px 12px var(--color-shadow);
}
.btn-download-nav:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--color-shadow);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
  background: #fff;
  border-top: 1px solid var(--color-border);
  padding: 16px 24px 24px;
}
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}
.mobile-menu a:hover { color: var(--color-primary); background: rgba(26, 110, 245, 0.06); }
.mobile-menu .btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  text-align: center;
  margin-top: 8px;
  border-radius: 50px;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  padding: 13px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 15px var(--color-shadow);
  white-space: nowrap;
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-shadow);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  padding: 13px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.5);
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-secondary:hover { color: #fff; background: rgba(255,255,255,0.25); border-color: rgba(255,255,255,0.8); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--color-primary);
  padding: 13px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--color-primary);
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-outline-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--color-primary);
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--color-primary);
  transition: all var(--transition);
}
.btn-outline-primary:hover { background: var(--color-primary); color: #fff; }

/* ===== Hero 区域 ===== */
.hero-section { background: linear-gradient(135deg, #0d1b3e 0%, #1a3a7a 50%, #0d2a5e 100%); overflow: hidden; }
.hero-swiper { width: 100%; }
.hero-slide { padding: 80px 0 60px; }
.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text { color: #fff; }
.hero-title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-secondary), #5af0c8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.82);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 24px; }
.hero-platform { font-size: 14px; color: rgba(255,255,255,0.6); }
.platform-link { color: var(--color-secondary); font-weight: 500; }
.platform-link:hover { color: #5af0c8; }
.hero-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3/2;
}

/* ===== 特色功能快速入口 ===== */
.feature-quick {
  background: #fff;
  padding: 0;
  position: relative;
  z-index: 10;
}
.feature-quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: #fff;
  border-radius: 0;
  box-shadow: 0 4px 30px rgba(0,0,0,0.08);
  overflow: hidden;
}
.fq-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 32px 20px;
  text-align: center;
  border-right: 1px solid var(--color-border);
  transition: all var(--transition);
  color: var(--color-text);
}
.fq-card:last-child { border-right: none; }
.fq-card:hover { background: rgba(26, 110, 245, 0.04); color: var(--color-primary); }
.fq-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.fq-badge.hot { background: #ff4757; color: #fff; }
.fq-badge.new { background: var(--color-secondary); color: #fff; }
.fq-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(26,110,245,0.1), rgba(0,200,150,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: all var(--transition);
}
.fq-card:hover .fq-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
}
.fq-card h3 { font-size: 15px; font-weight: 600; }
.fq-card p { font-size: 13px; color: var(--color-text-muted); }

/* ===== 章节通用样式 ===== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(26,110,245,0.1), rgba(0,200,150,0.1));
  color: var(--color-primary);
  border: 1px solid rgba(26,110,245,0.2);
  border-radius: 50px;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.section-header h2 {
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.section-desc { font-size: 16px; color: var(--color-text-muted); max-width: 680px; margin: 0 auto; line-height: 1.8; }

/* ===== 功能模块 ===== */
.features-section { padding: 96px 0; background: var(--color-bg-alt); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 32px 24px;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(26,110,245,0.2);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: #fff;
}
.feature-icon.chat { background: linear-gradient(135deg, #1a6ef5, #4d8ff8); }
.feature-icon.lock { background: linear-gradient(135deg, #6c3de8, #9b6df5); }
.feature-icon.shield { background: linear-gradient(135deg, #00c896, #00e5aa); }
.feature-icon.group { background: linear-gradient(135deg, #ff6b35, #ff9a5c); }
.feature-icon.screenshot { background: linear-gradient(135deg, #ff4757, #ff6b81); }
.feature-icon.preset { background: linear-gradient(135deg, #2ed573, #7bed9f); }
.feature-icon.interact { background: linear-gradient(135deg, #ffa502, #ffcc02); }
.feature-icon.avatar { background: linear-gradient(135deg, #1e90ff, #74b9ff); }
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; }

/* ===== 安全防护 ===== */
.protection-section { padding: 96px 0; background: #fff; }
.protection-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.protection-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  object-fit: cover;
}
.protection-content .section-tag { margin-bottom: 16px; }
.protection-content h2 { font-size: clamp(22px, 2.5vw, 34px); font-weight: 700; margin-bottom: 18px; line-height: 1.35; }
.protection-content > p { font-size: 15px; color: var(--color-text-muted); margin-bottom: 28px; line-height: 1.8; }
.protection-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 36px; }
.protection-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--color-text);
}
.protection-list li svg { color: var(--color-secondary); flex-shrink: 0; margin-top: 3px; }

/* ===== 预设密信 ===== */
.preset-section { padding: 96px 0; background: var(--color-bg-alt); }
.preset-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.preset-content .section-tag { margin-bottom: 16px; }
.preset-content h2 { font-size: clamp(22px, 2.5vw, 34px); font-weight: 700; margin-bottom: 18px; line-height: 1.35; }
.preset-content > p { font-size: 15px; color: var(--color-text-muted); margin-bottom: 32px; line-height: 1.8; }
.preset-image img { border-radius: var(--border-radius-lg); box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; }

/* ===== 蝙蝠形象 ===== */
.avatar-section { padding: 96px 0; background: #fff; }
.avatar-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.avatar-image img { border-radius: var(--border-radius-lg); box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; }
.avatar-content .section-tag { margin-bottom: 16px; }
.avatar-content h2 { font-size: clamp(22px, 2.5vw, 34px); font-weight: 700; margin-bottom: 18px; line-height: 1.35; }
.avatar-content > p { font-size: 15px; color: var(--color-text-muted); margin-bottom: 32px; line-height: 1.8; }

/* ===== 用户评价 ===== */
.reviews-section { padding: 96px 0; background: var(--color-bg-alt); }
.reviews-swiper { padding: 8px 4px 48px; }
.review-card {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 28px;
  border: 1px solid var(--color-border);
  height: 100%;
  transition: all var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); border-color: rgba(26,110,245,0.2); }
.review-stars { color: #fbbf24; font-size: 18px; margin-bottom: 12px; letter-spacing: 2px; }
.review-title { font-size: 16px; font-weight: 600; margin-bottom: 10px; }
.review-card p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 18px; }
.review-meta { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--color-text-light); border-top: 1px solid var(--color-border); padding-top: 14px; }
.review-meta span { font-weight: 500; color: var(--color-text-muted); }

/* ===== 最新资讯 ===== */
.news-section { padding: 96px 0; background: #fff; }
.news-section .section-header { display: flex; align-items: center; justify-content: space-between; text-align: left; margin-bottom: 40px; }
.news-section .section-header h2 { margin-bottom: 0; }
.more-link { color: var(--color-primary); font-size: 15px; font-weight: 500; white-space: nowrap; }
.more-link:hover { text-decoration: underline; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  background: #fff;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(26,110,245,0.2); }
.news-thumb { display: block; overflow: hidden; aspect-ratio: 16/9; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition); }
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-body { padding: 22px; }
.news-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.news-cat {
  background: rgba(26,110,245,0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
}
.news-meta time { font-size: 13px; color: var(--color-text-light); }
.news-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.news-body h3 a { color: var(--color-text); }
.news-body h3 a:hover { color: var(--color-primary); }
.news-body p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { font-size: 14px; color: var(--color-primary); font-weight: 500; }
.read-more:hover { text-decoration: underline; }

/* ===== CTA 下载区 ===== */
.cta-section {
  padding: 96px 0;
  background: linear-gradient(135deg, #0d1b3e 0%, #1a3a7a 100%);
  color: #fff;
}
.cta-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
}
.cta-content h2 { font-size: 14px; font-weight: 600; color: var(--color-secondary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.cta-content h3 { font-size: clamp(22px, 2.5vw, 34px); font-weight: 700; margin-bottom: 18px; line-height: 1.35; }
.cta-content p { font-size: 15px; color: rgba(255,255,255,0.75); margin-bottom: 36px; line-height: 1.8; max-width: 600px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  min-width: 130px;
}
.btn-download:hover { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.5); color: #fff; transform: translateY(-2px); }
.btn-download span { display: flex; flex-direction: column; }
.btn-download small { font-size: 11px; font-weight: 400; color: rgba(255,255,255,0.6); }
.cta-image img { max-width: 260px; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.4)); }

/* ===== 统计数据 ===== */
.stats-section { padding: 64px 0; background: var(--color-bg-alt); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
}
.stat-item {
  padding: 32px 20px;
  border-right: 1px solid var(--color-border);
}
.stat-item:last-child { border-right: none; }
.stat-number { display: block; font-size: clamp(28px, 3vw, 42px); font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.stat-label { font-size: 14px; color: var(--color-text-muted); }

/* ===== 页脚 ===== */
.site-footer { background: var(--color-bg-dark); color: rgba(255,255,255,0.75); padding: 72px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr 2fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand img { margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 14px; line-height: 1.7; margin-bottom: 20px; }
.footer-downloads { display: flex; gap: 10px; }
.dl-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.85);
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.dl-badge:hover { background: rgba(255,255,255,0.2); color: #fff; }
.footer-nav h4, .footer-social h4, .footer-contact h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.3px;
}
.footer-nav ul, .footer-social ul { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a, .footer-social a {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
}
.footer-nav a:hover, .footer-social a:hover { color: var(--color-secondary); }
.footer-contact p { font-size: 13px; margin-bottom: 10px; line-height: 1.6; }
.footer-contact a { color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer-contact a:hover { color: var(--color-secondary); }
.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-legal { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-legal a { color: rgba(255,255,255,0.45); transition: color var(--transition); }
.footer-legal a:hover { color: rgba(255,255,255,0.75); }

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px var(--color-shadow);
  transition: all var(--transition);
  z-index: 999;
}
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-3px); }

/* ===== Swiper 自定义 ===== */
.swiper-pagination-bullet { background: rgba(255,255,255,0.5); opacity: 1; }
.swiper-pagination-bullet-active { background: var(--color-secondary); width: 24px; border-radius: 4px; }
.swiper-button-prev, .swiper-button-next {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  color: #fff;
  transition: all var(--transition);
}
.swiper-button-prev:hover, .swiper-button-next:hover { background: rgba(255,255,255,0.3); }
.swiper-button-prev::after, .swiper-button-next::after { font-size: 16px; font-weight: 700; }
.reviews-pagination .swiper-pagination-bullet { background: var(--color-border); }
.reviews-pagination .swiper-pagination-bullet-active { background: var(--color-primary); }

/* ===== 列表页 / 面包屑 ===== */
.page-hero {
  background: linear-gradient(135deg, #0d1b3e, #1a3a7a);
  color: #fff;
  padding: 60px 0 48px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255,255,255,0.65); }
.breadcrumb a:hover { color: var(--color-secondary); }
.breadcrumb span { color: rgba(255,255,255,0.4); }
.breadcrumb .current { color: rgba(255,255,255,0.9); }
.page-hero h1 { font-size: clamp(24px, 3vw, 40px); font-weight: 700; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: rgba(255,255,255,0.75); max-width: 600px; }

/* ===== 列表页内容 ===== */
.list-section { padding: 72px 0; }
.list-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; }
.article-list { display: flex; flex-direction: column; gap: 28px; }
.article-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background: #fff;
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.article-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: rgba(26,110,245,0.2); }
.article-thumb { overflow: hidden; }
.article-thumb img { width: 100%; height: 100%; object-fit: cover; min-height: 160px; transition: transform var(--transition); }
.article-item:hover .article-thumb img { transform: scale(1.05); }
.article-body { padding: 24px 24px 24px 0; display: flex; flex-direction: column; justify-content: center; }
.article-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.article-cat {
  background: rgba(26,110,245,0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
}
.article-date { font-size: 13px; color: var(--color-text-light); }
.article-body h2 { font-size: 18px; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.article-body h2 a { color: var(--color-text); }
.article-body h2 a:hover { color: var(--color-primary); }
.article-body p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-footer { display: flex; align-items: center; justify-content: space-between; }
.article-views { font-size: 13px; color: var(--color-text-light); display: flex; align-items: center; gap: 5px; }

/* ===== 侧边栏 ===== */
.sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-widget {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 24px;
  border: 1px solid var(--color-border);
}
.sidebar-widget h3 { font-size: 16px; font-weight: 600; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--color-primary); display: inline-block; }
.sidebar-list { display: flex; flex-direction: column; gap: 14px; }
.sidebar-item { display: flex; gap: 12px; align-items: flex-start; }
.sidebar-item img { width: 70px; height: 52px; object-fit: cover; border-radius: 8px; flex-shrink: 0; }
.sidebar-item-body { flex: 1; }
.sidebar-item-body a { font-size: 14px; font-weight: 500; color: var(--color-text); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-item-body a:hover { color: var(--color-primary); }
.sidebar-item-date { font-size: 12px; color: var(--color-text-light); margin-top: 4px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.tag-cloud a:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ===== 分页 ===== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 48px; flex-wrap: wrap; }
.pagination a, .pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.pagination a:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.pagination .active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ===== 内容页 ===== */
.article-detail { padding: 72px 0; }
.article-detail-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; }
.article-content-wrap {
  background: #fff;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.article-header { padding: 36px 40px 28px; border-bottom: 1px solid var(--color-border); }
.article-header h1 { font-size: clamp(20px, 2.5vw, 30px); font-weight: 700; line-height: 1.4; margin-bottom: 16px; }
.article-info { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--color-text-muted); }
.article-info .cat-tag {
  background: rgba(26,110,245,0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
}
.article-cover { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.article-body-content { padding: 36px 40px; }
.article-body-content h2 { font-size: 22px; font-weight: 700; margin: 32px 0 14px; color: var(--color-text); }
.article-body-content h3 { font-size: 18px; font-weight: 600; margin: 24px 0 12px; }
.article-body-content h4 { font-size: 16px; font-weight: 600; margin: 20px 0 10px; }
.article-body-content p { font-size: 15px; line-height: 1.9; color: var(--color-text); margin-bottom: 18px; }
.article-body-content ul, .article-body-content ol { padding-left: 24px; margin-bottom: 18px; }
.article-body-content li { font-size: 15px; line-height: 1.8; margin-bottom: 8px; color: var(--color-text); }
.article-body-content ul li { list-style: disc; }
.article-body-content ol li { list-style: decimal; }
.article-body-content img { border-radius: var(--border-radius); margin: 24px 0; box-shadow: var(--shadow-md); }
.article-body-content blockquote {
  border-left: 4px solid var(--color-primary);
  background: rgba(26,110,245,0.04);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--color-text-muted);
}
.article-tags { padding: 20px 40px 28px; border-top: 1px solid var(--color-border); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.article-tags span { font-size: 14px; font-weight: 500; color: var(--color-text-muted); }
.article-tag {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.article-tag:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ===== 相关文章 ===== */
.related-articles { padding: 72px 0 96px; background: var(--color-bg-alt); }
.related-articles h2 { font-size: 24px; font-weight: 700; margin-bottom: 32px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* ===== 下载页 ===== */
.download-hero {
  background: linear-gradient(135deg, #0d1b3e 0%, #1a3a7a 100%);
  color: #fff;
  padding: 80px 0 64px;
  text-align: center;
}
.download-hero h1 { font-size: clamp(28px, 4vw, 48px); font-weight: 700; margin-bottom: 18px; }
.download-hero p { font-size: 17px; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 40px; }
.download-platforms { padding: 80px 0; }
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; max-width: 900px; margin: 0 auto; }
.download-card {
  background: #fff;
  border-radius: var(--border-radius-lg);
  padding: 40px;
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition);
}
.download-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(26,110,245,0.2); }
.download-card-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(26,110,245,0.1), rgba(0,200,150,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--color-primary);
}
.download-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.download-card p { font-size: 14px; color: var(--color-text-muted); margin-bottom: 24px; }
.download-card .version { font-size: 13px; color: var(--color-text-light); margin-bottom: 20px; }
.download-card .btn-primary { width: 100%; justify-content: center; }
.download-qr { text-align: center; padding: 64px 0; background: var(--color-bg-alt); }
.download-qr h2 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.download-qr p { font-size: 16px; color: var(--color-text-muted); margin-bottom: 40px; }
.qr-codes { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 160px; height: 160px; border-radius: 16px; border: 1px solid var(--color-border); padding: 12px; background: #fff; margin-bottom: 12px; }
.qr-item span { font-size: 14px; font-weight: 500; color: var(--color-text-muted); }

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-image { display: none; }
  .feature-quick-grid { grid-template-columns: repeat(2, 1fr); }
  .protection-inner, .preset-inner, .avatar-inner { grid-template-columns: 1fr; gap: 40px; }
  .cta-inner { grid-template-columns: 1fr; }
  .cta-image { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .list-layout, .article-detail-layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .download-grid { grid-template-columns: 1fr; max-width: 480px; }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-item { grid-template-columns: 1fr; }
  .article-thumb img { min-height: 200px; }
  .article-body { padding: 20px; }
  .article-header, .article-body-content, .article-tags { padding-left: 24px; padding-right: 24px; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .feature-quick-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .cta-actions { flex-direction: column; }
}

/* ===== 打印样式 ===== */
@media print {
  .site-header, .top-notice, .hero-section, .cta-section, .site-footer, .back-to-top { display: none; }
  body { color: #000; }
  a { color: #000; text-decoration: underline; }
}