/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue: #2196F3;
  --blue-dark: #1565C0;
  --blue-light: #E3F2FD;
  --green: #4CAF50;
  --red: #F44336;
  --orange: #FF9800;
  --gray-50: #F8F9FA;
  --gray-100: #F1F3F4;
  --gray-200: #E8EAED;
  --gray-400: #9AA0A6;
  --gray-600: #5F6368;
  --gray-800: #3C4043;
  --gray-900: #202124;
  --text: #202124;
  --text-light: #5F6368;
  --border: #E8EAED;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow: 0 4px 12px rgba(0,0,0,.10);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --radius: 12px;
  --radius-sm: 8px;
}
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: #fff; line-height: 1.6; font-size: 15px; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }
img { max-width: 100%; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; gap: 32px; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--gray-900); flex-shrink: 0; }
.logo-icon { width: 36px; height: 36px; background: var(--blue); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--gray-900); font-size: 14px; font-weight: 800; }
nav { display: flex; gap: 4px; flex: 1; }
nav a { padding: 6px 14px; border-radius: 20px; color: var(--gray-600); font-size: 14px; transition: all .2s; }
nav a:hover, nav a.active { background: var(--blue-light); color: var(--blue); }
.header-dl-btn { background: var(--blue); color: #fff !important; padding: 8px 20px !important; border-radius: 20px !important; font-weight: 600; font-size: 14px; flex-shrink: 0; }
.header-dl-btn:hover { background: var(--blue-dark) !important; }

/* ===== Hero ===== */
.hero { background: #fff; color: var(--gray-900); border-bottom: 1px solid var(--border); padding: 60px 0; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: var(--blue-light); border: 1px solid var(--blue); color: var(--blue); padding: 4px 14px; border-radius: 20px; font-size: 13px; margin-bottom: 16px; }
.hero h1 { font-size: 40px; font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.hero h1 span { color: var(--blue); }
.hero p { color: var(--text-light); font-size: 16px; margin-bottom: 28px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 8px; background: var(--blue); color: #fff !important; padding: 12px 28px; border-radius: 8px; font-weight: 700; font-size: 15px; box-shadow: var(--shadow); transition: all .2s; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary { display: inline-flex; align-items: center; gap: 8px; background: #fff; color: var(--blue) !important; padding: 12px 24px; border-radius: 8px; font-weight: 600; font-size: 15px; border: 1px solid var(--blue); transition: all .2s; }
.btn-secondary:hover { background: var(--blue-light); }
.hero-stats { display: flex; gap: 32px; margin-top: 32px; }
.stat .stat-num { font-size: 28px; font-weight: 800; }
.stat .stat-label { font-size: 12px; color: var(--text-light); }

/* ===== Hero Visual (download card preview) ===== */
.hero-visual { display: flex; flex-direction: column; gap: 12px; }
.mini-dl-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; display: flex; align-items: center; gap: 14px; transition: all .2s; box-shadow: var(--shadow-sm); }
.mini-dl-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); border-color: var(--blue); }
.mini-icon { width: 44px; height: 44px; background: var(--blue); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-weight: 800; color: #fff; font-size: 14px; flex-shrink: 0; }
.mini-icon.win { background: #0078D4; }
.mini-icon.and { background: #3DDC84; color: #000; }
.mini-icon.ios { background: #555; }
.mini-info { flex: 1; }
.mini-name { font-weight: 600; color: var(--gray-900); font-size: 14px; }
.mini-ver { color: var(--text-light); font-size: 12px; }
.mini-dl-btn { background: var(--blue); color: #fff !important; padding: 6px 14px; border-radius: 6px; font-size: 13px; font-weight: 600; transition: all .2s; }

/* ===== Platform Tabs ===== */
.platform-tabs { display: flex; gap: 8px; padding: 20px 0 0; border-bottom: 1px solid var(--border); }
.tab-btn { padding: 10px 20px; border-radius: 8px 8px 0 0; border: 1px solid transparent; border-bottom: none; cursor: pointer; font-size: 14px; font-weight: 500; color: var(--text-light); background: transparent; transition: all .2s; display: flex; align-items: center; gap: 6px; }
.tab-btn.active { background: #fff; border-color: var(--border); color: var(--blue); font-weight: 600; margin-bottom: -1px; }
.tab-btn:hover:not(.active) { color: var(--text); background: var(--gray-50); }

/* ===== Download Cards Grid ===== */
.dl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; padding: 24px 0; }
.dl-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: all .2s; position: relative; overflow: hidden; }
.dl-card:hover { box-shadow: var(--shadow-lg); border-color: var(--blue); transform: translateY(-2px); }
.dl-card-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 16px; }
.app-icon { width: 56px; height: 56px; background: var(--blue); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-weight: 800; color: #fff; font-size: 18px; flex-shrink: 0; }
.app-info h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.app-info .ver { color: var(--text-light); font-size: 13px; }
.app-info .platform-badge { display: inline-flex; align-items: center; gap: 4px; background: var(--blue-light); color: var(--blue); padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 500; margin-top: 4px; }
.dl-meta { display: flex; gap: 16px; margin-bottom: 16px; }
.meta-item { display: flex; flex-direction: column; }
.meta-label { font-size: 11px; color: var(--text-light); text-transform: uppercase; letter-spacing: .5px; }
.meta-val { font-size: 14px; font-weight: 600; color: var(--gray-800); }
.dl-btn-wrap { display: flex; gap: 10px; }
.dl-btn-main { flex: 1; background: var(--blue); color: #fff !important; padding: 10px 0; border-radius: var(--radius-sm); font-weight: 700; font-size: 14px; text-align: center; transition: all .2s; display: flex; align-items: center; justify-content: center; gap: 6px; }
.dl-btn-main:hover { background: var(--blue-dark); }
.dl-btn-detail { padding: 10px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-light) !important; font-size: 14px; transition: all .2s; }
.dl-btn-detail:hover { border-color: var(--blue); color: var(--blue) !important; }
.badge-safe { position: absolute; top: 12px; right: 12px; background: #E8F5E9; color: var(--green); padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-hot { position: absolute; top: 12px; right: 12px; background: #FFF3E0; color: var(--orange); padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }

/* ===== Section ===== */
.section { padding: 60px 0; }
.section-alt { background: var(--gray-50); }
.section-header { text-align: center; margin-bottom: 40px; }
.section-tag { display: inline-block; background: var(--blue-light); color: var(--blue); padding: 4px 14px; border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 12px; }
.section-header h2 { font-size: 28px; font-weight: 800; margin-bottom: 10px; }
.section-sub { color: var(--text-light); font-size: 15px; }

/* ===== Download Detail Page ===== */
.dl-detail-wrap { display: grid; grid-template-columns: 1fr 360px; gap: 40px; padding: 40px 0; }
.dl-detail-main h1 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.dl-detail-main .tagline { color: var(--text-light); font-size: 16px; margin-bottom: 24px; }
.dl-info-bar { display: flex; gap: 24px; flex-wrap: wrap; padding: 20px; background: var(--gray-50); border-radius: var(--radius); margin-bottom: 28px; border: 1px solid var(--border); }
.info-bar-item { display: flex; flex-direction: column; }
.info-bar-label { font-size: 11px; color: var(--text-light); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 2px; }
.info-bar-val { font-size: 15px; font-weight: 600; }

/* Download Sidebar */
.dl-sidebar { position: sticky; top: 80px; }
.dl-box { background: #fff; border: 2px solid var(--blue); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-lg); }
.dl-box-app { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.dl-box-icon { width: 64px; height: 64px; background: var(--blue); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-weight: 800; color: #fff; font-size: 22px; }
.dl-box-name { font-size: 20px; font-weight: 800; }
.dl-box-ver { color: var(--text-light); font-size: 14px; }
.dl-version-list { margin-bottom: 20px; }
.dl-version-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 8px; transition: all .2s; cursor: pointer; }
.dl-version-item:hover, .dl-version-item.selected { border-color: var(--blue); background: var(--blue-light); }
.dv-platform { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; }
.dv-platform-icon { width: 28px; height: 28px; border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; color: #fff; }
.dv-platform-icon.win { background: #0078D4; }
.dv-platform-icon.and { background: #3DDC84; color: #000; }
.dv-platform-icon.ios { background: #555; }
.dv-platform-icon.mac { background: #888; }
.dv-info { text-align: right; }
.dv-size { font-size: 13px; color: var(--text-light); }
.dv-new { font-size: 11px; color: var(--green); font-weight: 600; }
.dl-main-btn { display: block; background: var(--blue); color: #fff !important; text-align: center; padding: 14px; border-radius: var(--radius-sm); font-size: 16px; font-weight: 700; margin-bottom: 12px; transition: all .2s; }
.dl-main-btn:hover { background: var(--blue-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(33,150,243,.4); }
.dl-safe-note { display: flex; align-items: center; gap: 8px; background: #E8F5E9; color: #388E3C; padding: 10px 14px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500; margin-bottom: 16px; }
.dl-info-small { font-size: 12px; color: var(--text-light); text-align: center; }

/* ===== Screenshots ===== */
.screenshots { display: flex; gap: 12px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 28px; }
.screenshot { min-width: 200px; height: 140px; background: var(--gray-100); border-radius: var(--radius-sm); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--gray-400); font-size: 13px; flex-shrink: 0; overflow: hidden; }
.screenshot-mock { width: 100%; height: 100%; background: linear-gradient(135deg, #1565C0, #0288D1); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: rgba(255,255,255,.9); font-size: 12px; }
.screenshot-mock .sm-icon { font-size: 28px; }

/* ===== Article Page ===== */
.article-layout { display: grid; grid-template-columns: 1fr 280px; gap: 48px; padding: 40px 0; }
.article-main h1 { font-size: 30px; font-weight: 800; margin-bottom: 12px; line-height: 1.35; }
.article-meta { display: flex; align-items: center; gap: 16px; color: var(--text-light); font-size: 13px; padding: 12px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin-bottom: 28px; }
.article-meta .author { font-weight: 600; color: var(--text); }
.article-body h2 { font-size: 22px; font-weight: 700; margin: 36px 0 14px; padding-top: 8px; border-top: 2px solid var(--blue-light); }
.article-body h3 { font-size: 18px; font-weight: 600; margin: 24px 0 10px; color: var(--gray-800); }
.article-body p { margin-bottom: 16px; line-height: 1.8; color: var(--gray-800); }
.article-body ul, .article-body ol { margin: 12px 0 16px 20px; }
.article-body li { margin-bottom: 8px; line-height: 1.7; }
.article-body .tip-box { background: var(--blue-light); border-left: 4px solid var(--blue); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 14px 18px; margin: 20px 0; }
.article-body .tip-box strong { color: var(--blue); }
.article-body .warn-box { background: #FFF3E0; border-left: 4px solid var(--orange); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 14px 18px; margin: 20px 0; }

/* Article Sidebar */
.article-sidebar { position: sticky; top: 80px; }
.sidebar-toc { background: var(--gray-50); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.sidebar-toc h4 { font-size: 14px; font-weight: 700; margin-bottom: 12px; color: var(--gray-800); }
.toc-list { list-style: none; }
.toc-list li { margin-bottom: 4px; }
.toc-list a { font-size: 13px; color: var(--text-light); display: block; padding: 4px 8px; border-radius: 6px; border-left: 2px solid transparent; transition: all .2s; }
.toc-list a:hover, .toc-list a.active { background: var(--blue-light); color: var(--blue); border-left-color: var(--blue); }
.sidebar-dl-card { background: var(--blue); color: #fff; border-radius: var(--radius); padding: 20px; text-align: center; }
.sidebar-dl-card .sdl-icon { width: 52px; height: 52px; background: rgba(255,255,255,.2); border-radius: 12px; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 800; }
.sidebar-dl-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.sidebar-dl-card p { font-size: 13px; color: rgba(255,255,255,.8); margin-bottom: 16px; }
.sidebar-dl-card a { display: block; background: #fff; color: var(--blue) !important; padding: 10px; border-radius: var(--radius-sm); font-weight: 700; font-size: 14px; }

/* ===== Related Posts ===== */
.related-posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.rp-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all .2s; }
.rp-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.rp-thumb { height: 120px; background: linear-gradient(135deg, #1565C0, #0288D1); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.7); font-size: 28px; }
.rp-body { padding: 16px; }
.rp-tag { font-size: 11px; color: var(--blue); font-weight: 600; text-transform: uppercase; letter-spacing: .5px; margin-bottom: 6px; }
.rp-title { font-size: 14px; font-weight: 600; margin-bottom: 6px; line-height: 1.4; color: var(--gray-800); }
.rp-date { font-size: 12px; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.faq-q { padding: 16px 20px; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: background .2s; }
.faq-q:hover { background: var(--gray-50); }
.faq-q::after { content: "+"; font-size: 20px; color: var(--blue); flex-shrink: 0; }
.faq-item.open .faq-q { background: var(--blue-light); color: var(--blue); }
.faq-item.open .faq-q::after { content: "−"; }
.faq-a { display: none; padding: 16px 20px; color: var(--text-light); border-top: 1px solid var(--border); line-height: 1.7; }
.faq-item.open .faq-a { display: block; }

/* ===== Breadcrumb ===== */
.breadcrumb { padding: 14px 0; font-size: 13px; color: var(--text-light); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { margin: 0 6px; }

/* ===== Articles Section ===== */
.articles-section { background: var(--gray-50); padding: 64px 0; }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
.article-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow .2s, transform .2s; }
.article-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.article-card-link { display: block; color: inherit; text-decoration: none; }
.article-card-img { height: 180px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; }
.article-img-placeholder { font-size: 64px; }
.article-card-body { padding: 20px; }
.article-card-meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-light); margin-bottom: 8px; }
.article-category { background: var(--blue-light); color: var(--blue); padding: 2px 8px; border-radius: 4px; font-weight: 600; }
.article-card-title { font-size: 16px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; line-height: 1.4; }
.article-card-excerpt { font-size: 13px; color: var(--text-light); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card-readmore { font-size: 13px; color: var(--blue); font-weight: 600; }
.cta { background: var(--gray-50); color: var(--gray-900); padding: 60px 0; text-align: center; }
.cta h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.cta p { color: var(--text-light); margin-bottom: 28px; font-size: 16px; }
.cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-white { background: var(--blue); color: #fff !important; padding: 12px 28px; border-radius: 8px; font-weight: 700; font-size: 15px; transition: all .2s; }
.btn-outline-white { border: 2px solid var(--blue); color: var(--blue) !important; padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: 15px; transition: all .2s; }
.btn-outline-white:hover { background: var(--blue-light); }

/* ===== Footer ===== */
footer { background: var(--gray-900); color: rgba(255,255,255,.8); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
.footer-brand h3 { color: #fff; font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.55); }
.footer-col h4 { color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: rgba(255,255,255,.55); font-size: 13px; transition: color .2s; }
.footer-col a:hover { color: rgba(255,255,255,.9); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; display: flex; justify-content: space-between; font-size: 12px; color: rgba(255,255,255,.35); flex-wrap: wrap; gap: 8px; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .dl-detail-wrap { grid-template-columns: 1fr; }
  .dl-sidebar { position: static; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .related-posts { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .dl-grid { grid-template-columns: 1fr; }
  nav { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .related-posts { grid-template-columns: 1fr; }
}
/* ===== Features Section ===== */
.features {
  background: linear-gradient(180deg, #f8f9fa 0%, #fff 100%);
  padding: 90px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.feature-card {
  background: #fff;
  border-radius: 16px;
  padding: 36px 30px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  border: 1px solid rgba(0,0,0,.04);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #2196F3, #00BCD4);
  opacity: 0;
  transition: opacity .3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(33,150,243,.15);
  border-color: rgba(33,150,243,.15);
}

.feature-card:hover::after { opacity: 1; }

.feature-icon-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.feature-icon-bg {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

.feature-icon-bg::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2196F3, #00BCD4);
  opacity: .15;
  z-index: -1;
}

.feature-stat {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #2196F3, #1976D2);
  padding: 5px 14px;
  border-radius: 20px;
  letter-spacing: .3px;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #1a1a2e;
  line-height: 1.35;
}

.feature-card p {
  font-size: 14.5px;
  color: #555;
  line-height: 1.75;
  margin-bottom: 18px;
}

.feature-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.feature-tags span {
  font-size: 12px;
  color: #2196F3;
  background: rgba(33,150,243,.08);
  padding: 4px 12px;
  border-radius: 12px;
  font-weight: 500;
}

@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .feature-grid { grid-template-columns: 1fr; }
  .features { padding: 60px 0; }
}

/* ===== CPA Download Banner (首页) ===== */
.cpa-banner {
  background: #fff;
  color: var(--gray-900);
  padding: 28px 0;
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--blue);
  border-bottom: 1px solid var(--border);
}
.cpa-banner::before {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,.08) 0%, transparent 70%);
  border-radius: 50%;
}
.cpa-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
  z-index: 1;
}
.cpa-banner-left {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 1;
}
.cpa-banner-icon {
  width: 56px; height: 56px;
  background: var(--blue-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cpa-banner-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 4px;
}
.cpa-banner-desc {
  font-size: 13px;
  color: var(--text-light);
}
.cpa-banner-btns {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
  flex-wrap: wrap;
}
.cpa-btn-win { background: #0078D4; color: #fff !important; }
.cpa-btn-android { background: #3DDC84; color: #1a1a1a !important; }
.cpa-btn-ios { background: #333; color: #fff !important; }
.cpa-btn-mac { background: #555; color: #fff !important; }
.cpa-btn-win, .cpa-btn-android, .cpa-btn-ios, .cpa-btn-mac {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  transition: all .2s;
  border: none;
}
.cpa-btn-win:hover { background: #006CBF; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,120,212,.4); }
.cpa-btn-android:hover { background: #2fc76e; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(61,220,132,.4); }
.cpa-btn-ios:hover { background: #555; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(85,85,85,.4); }
.cpa-btn-mac:hover { background: #777; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(136,136,136,.4); }

/* ===== CPA Article Download Card (文章页) ===== */
.cpa-article-card {
  background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
  border: 2px solid var(--blue);
  border-radius: 16px;
  padding: 28px 32px;
  margin: 32px 0;
  position: relative;
  overflow: hidden;
}
.cpa-article-card::before {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 120px; height: 120px;
  background: radial-gradient(circle, rgba(33,150,243,.15) 0%, transparent 70%);
  border-radius: 50%;
}
.cpa-ac-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.cpa-ac-icon {
  width: 52px; height: 52px;
  background: var(--blue);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.cpa-ac-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--gray-900);
}
.cpa-ac-sub {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 2px;
}
.cpa-ac-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.cpa-ac-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  transition: all .2s;
  color: #fff;
}
.cpa-ac-win { background: #0078D4; }
.cpa-ac-android { background: #3DDC84; color: #1a1a1a; }
.cpa-ac-ios { background: #333; }
.cpa-ac-mac { background: #555; }
.cpa-ac-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,.2);
  color: #fff;
}
.cpa-ac-android:hover { color: #1a1a1a; }
.cpa-ac-safe {
  font-size: 13px;
  color: #388E3C;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== CPA Sticky Bar (吸底下载条) ===== */
.cpa-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #fff;
  border-top: 2px solid var(--blue);
  box-shadow: 0 -4px 20px rgba(0,0,0,.12);
  z-index: 9999;
  padding: 0;
  animation: slideUp .4s ease;
}
@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.cpa-sticky-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.cpa-sticky-info {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.cpa-sticky-name {
  font-size: 16px;
  font-weight: 800;
  color: var(--gray-900);
}
.cpa-sticky-label {
  font-size: 12px;
  color: var(--green);
  font-weight: 600;
}
.cpa-sticky-btns {
  display: flex;
  gap: 8px;
  flex: 1;
  justify-content: center;
}
.cpa-sticky-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  background: var(--blue);
  color: #fff !important;
  transition: all .2s;
}
.cpa-sticky-btn:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}
.cpa-sticky-android { background: #3DDC84; color: #1a1a1a !important; }
.cpa-sticky-android:hover { background: #2fc76e; }
.cpa-sticky-ios { background: #333; }
.cpa-sticky-ios:hover { background: #555; }
.cpa-sticky-close {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 28px; height: 28px;
  font-size: 14px;
  color: var(--text-light);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all .2s;
}
.cpa-sticky-close:hover {
  background: var(--gray-100);
  color: var(--gray-800);
}

/* CPA Responsive */
@media (max-width: 900px) {
  .cpa-banner-inner { flex-direction: column; text-align: center; }
  .cpa-banner-left { flex-direction: column; }
  .cpa-banner-btns { justify-content: center; }
}
@media (max-width: 600px) {
  .cpa-ac-btns { flex-direction: column; }
  .cpa-ac-btn { justify-content: center; }
  .cpa-sticky-inner { flex-wrap: wrap; gap: 8px; }
  .cpa-sticky-btns { flex-wrap: wrap; }
  .cpa-sticky-btn { padding: 6px 14px; font-size: 12px; }
  .cpa-sticky-info { width: 100%; flex-direction: row; justify-content: space-between; align-items: center; }
  .cpa-sticky-close { position: absolute; top: 8px; right: 16px; }
  .cpa-sticky-inner { position: relative; padding-right: 48px; }
}


/* ===== Article TOC ===== */
.article-toc {
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 24px 0 32px;
  display: none; /* shown by JS when populated */
}
.article-toc h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--blue-light);
}
.article-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.article-toc li {
  margin-bottom: 8px;
  padding-left: 16px;
  position: relative;
}
.article-toc li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}
.article-toc li.h3 {
  padding-left: 28px;
}
.article-toc li.h3::before {
  background: var(--gray-400);
  width: 5px;
  height: 5px;
}
.article-toc li a {
  color: var(--gray-800);
  font-size: 14px;
  line-height: 1.5;
  transition: color .2s;
}
.article-toc li a:hover {
  color: var(--blue);
}
.article-toc li.h3 a {
  font-size: 13px;
  color: var(--text-light);
}

/* ===== Enhanced Article Typography ===== */
article {
  max-width: 720px;
  margin: 0 auto;
}

/* H2 with decorative left border and number */
article h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 16px;
  padding: 12px 16px 12px 20px;
  background: linear-gradient(90deg, var(--blue-light) 0%, transparent 100%);
  border-left: 4px solid var(--blue);
  border-radius: 0 8px 8px 0;
  color: var(--gray-900);
  line-height: 1.4;
}

/* H3 with subtle background */
article h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 28px 0 12px;
  padding: 8px 14px;
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--gray-800);
}

/* Paragraphs with proper spacing */
article p {
  margin-bottom: 16px;
  line-height: 1.9;
  color: var(--gray-800);
  font-size: 15px;
}

/* Lists with custom bullets */
article ul, article ol {
  margin: 12px 0 20px 0;
  padding-left: 24px;
}
article li {
  margin-bottom: 10px;
  line-height: 1.8;
  color: var(--gray-800);
  position: relative;
}
article ul li::marker {
  color: var(--blue);
}

/* Tip box - blue gradient */
.tip-box {
  background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 14.5px;
  line-height: 1.7;
}
.tip-box strong {
  color: var(--blue);
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

/* Warning box - orange gradient */
.warn-box {
  background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
  border-left: 4px solid var(--orange);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 14.5px;
  line-height: 1.7;
}
.warn-box strong {
  color: var(--orange);
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

/* Step box - numbered steps with visual indicator */
.step-box {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 20px 0;
  position: relative;
  padding-left: 60px;
}
.step-box::before {
  content: attr(data-step);
  position: absolute;
  left: 16px;
  top: 20px;
  width: 32px;
  height: 32px;
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}
.step-box h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--gray-900);
}

/* Code / inline code */
article code {
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13.5px;
  color: var(--blue-dark);
  font-family: "SF Mono", Monaco, "Courier New", monospace;
}
article pre {
  background: var(--gray-900);
  color: #fff;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 16px 0;
  font-size: 13.5px;
  line-height: 1.6;
}
article pre code {
  background: none;
  color: inherit;
  padding: 0;
}

/* Highlighted note */
.note-highlight {
  background: #FFFDE7;
  border: 1px dashed #FDD835;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 14px;
  line-height: 1.7;
}
.note-highlight::before {
  content: "💡 ";
}

/* Divider with text */
.divider-text {
  display: flex;
  align-items: center;
  margin: 32px 0;
  color: var(--text-light);
  font-size: 13px;
}
.divider-text::before, .divider-text::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider-text span {
  padding: 0 16px;
}

/* Table styles */
article table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
article th {
  background: var(--blue);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}
article td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
article tr:nth-child(even) {
  background: var(--gray-50);
}

/* ===== Article Component Styles ===== */
.lead-paragraph {
  font-size: 17px;
  line-height: 1.9;
  color: var(--gray-800);
  margin-bottom: 24px;
  padding: 16px 20px;
  background: linear-gradient(135deg, #F5F7FA 0%, #EEF1F5 100%);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--blue);
}

.article-meta {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 28px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.platform-label {
  display: inline-block;
  font-weight: 700;
  font-size: 15px;
  padding: 6px 14px;
  border-radius: 20px;
  margin: 16px 0 8px;
}
.platform-label.android {
  background: #E8F5E9;
  color: #2E7D32;
}
.platform-label.ios {
  background: #F3E5F5;
  color: #7B1FA2;
}

.meta-text {
  color: var(--text-light);
  font-size: 14px;
}