/* ============================================================
   Pure News Info - 核心样式: 变量/重置/布局/头部/页脚
   ============================================================ */

:root {
  --primary-color: #0F172A;
  --accent-color: #E63946;
  --bg-color: #F5F7FA;
  --card-bg: #FFFFFF;
  --text-color: #1F2937;
  --text-secondary: #6B7280;
  --border-color: #E5E7EB;
  --header-height: 64px;
  --content-max-width: 1280px;
  --sidebar-width: 320px;
  --gap-sm: 8px;
  --gap-md: 16px;
  --gap-lg: 24px;
  --gap-xl: 32px;
  --gap-2xl: 48px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --font-xs: 12px;
  --font-sm: 14px;
  --font-base: 16px;
  --font-lg: 18px;
  --font-xl: 22px;
  --font-2xl: 28px;
  --font-3xl: 36px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --image-ratio: 56.25%;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: var(--font-base); line-height: 1.7;
  color: var(--text-color); background-color: var(--bg-color);
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-color); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; color: inherit; }
input { font-family: inherit; font-size: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }

.container { width: 100%; max-width: var(--content-max-width); margin-left: auto; margin-right: auto; padding-left: var(--gap-md); padding-right: var(--gap-md); }
.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; }
.word-break { word-break: break-word; overflow-wrap: break-word; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: var(--card-bg); border-bottom: 1px solid var(--border-color);
  height: var(--header-height); transition: box-shadow var(--transition-normal);
}
.site-header.scrolled { box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.site-logo { display: flex; align-items: center; gap: var(--gap-sm); flex-shrink: 0; max-width: 240px; }
.site-logo img { height: 36px; width: auto; object-fit: contain; }
.site-logo .logo-text { font-size: var(--font-lg); font-weight: 700; color: var(--primary-color); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > li { position: relative; }
.main-nav > li > a {
  display: flex; align-items: center; padding: 8px 14px;
  font-size: var(--font-sm); font-weight: 500; color: var(--text-color);
  border-radius: var(--radius-md); transition: all var(--transition-fast); white-space: nowrap;
}
.main-nav > li > a:hover,
.main-nav > li > a.active { color: var(--accent-color); background: rgba(230,57,70,0.06); }

.main-nav .sub-menu {
  position: absolute; top: 100%; left: 0; min-width: 180px;
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  padding: 6px 0; opacity: 0; visibility: hidden;
  transform: translateY(8px); transition: all var(--transition-fast);
}
.main-nav > li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.main-nav .sub-menu li a { display: block; padding: 8px 16px; font-size: var(--font-sm); color: var(--text-color); white-space: nowrap; transition: all var(--transition-fast); }
.main-nav .sub-menu li a:hover { background: var(--bg-color); color: var(--accent-color); }

.header-actions { display: flex; align-items: center; gap: var(--gap-sm); flex-shrink: 0; }
.header-actions .search-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-full);
  color: var(--text-secondary); font-size: var(--font-lg); transition: all var(--transition-fast);
}
.header-actions .search-toggle:hover { color: var(--accent-color); background: var(--bg-color); }

.mobile-menu-toggle {
  display: none; flex-direction: column; justify-content: center; align-items: center;
  width: 40px; height: 40px; gap: 5px; border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.mobile-menu-toggle:hover { background: var(--bg-color); }
.mobile-menu-toggle span { display: block; width: 22px; height: 2px; background: var(--text-color); border-radius: 2px; transition: all var(--transition-normal); }
.mobile-menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.search-panel {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.6); z-index: 2000;
  display: flex; align-items: flex-start; justify-content: center; padding-top: 120px;
  opacity: 0; visibility: hidden; transition: all var(--transition-normal);
}
.search-panel.active { opacity: 1; visibility: visible; }
.search-panel-inner {
  width: 90%; max-width: 600px; background: var(--card-bg);
  border-radius: var(--radius-lg); padding: var(--gap-lg);
  box-shadow: 0 16px 48px rgba(0,0,0,0.2);
}
.search-panel form { display: flex; gap: var(--gap-sm); }
.search-panel input {
  flex: 1; padding: 12px 16px; border: 2px solid var(--border-color);
  border-radius: var(--radius-md); font-size: var(--font-base); outline: none;
  transition: border-color var(--transition-fast);
}
.search-panel input:focus { border-color: var(--accent-color); }
.search-panel button {
  padding: 12px 24px; background: var(--accent-color); color: #fff;
  border-radius: var(--radius-md); font-weight: 600; font-size: var(--font-sm);
  transition: opacity var(--transition-fast); white-space: nowrap;
}
.search-panel button:hover { opacity: 0.85; }
.search-panel .search-close { display: block; margin-top: var(--gap-md); text-align: center; color: var(--text-secondary); font-size: var(--font-sm); cursor: pointer; }

.mobile-nav-overlay { display: none; }

/* ============================================================
   Page Layout
   ============================================================ */
.page-layout { display: flex; gap: var(--gap-xl); padding: var(--gap-lg) 0; }
.page-content { flex: 1; min-width: 0; }
.page-sidebar { width: var(--sidebar-width); flex-shrink: 0; }

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; padding: var(--gap-md) 0; font-size: var(--font-sm); color: var(--text-secondary); }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-color); }
.breadcrumb .separator { margin: 0 4px; color: var(--border-color); }

/* ============================================================
   Section Titles
   ============================================================ */
.section-title {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--gap-lg); padding-bottom: var(--gap-sm);
  border-bottom: 3px solid var(--primary-color); position: relative;
}
.section-title h2, .section-title h3 { font-size: var(--font-xl); font-weight: 700; color: var(--primary-color); }
.section-title .more-link { font-size: var(--font-sm); color: var(--text-secondary); display: flex; align-items: center; gap: 4px; white-space: nowrap; transition: color var(--transition-fast); }
.section-title .more-link:hover { color: var(--accent-color); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: var(--primary-color); color: rgba(255,255,255,0.8); margin-top: var(--gap-2xl); }
.footer-main { padding: var(--gap-2xl) 0 var(--gap-xl); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--gap-xl); }

.footer-col .footer-logo { display: flex; align-items: center; gap: var(--gap-sm); margin-bottom: var(--gap-md); }
.footer-col .footer-logo img { height: 32px; width: auto; }
.footer-col .footer-logo .footer-brand { font-size: var(--font-lg); font-weight: 700; color: #fff; }
.footer-col .footer-desc { font-size: var(--font-sm); line-height: 1.7; margin-bottom: var(--gap-md); opacity: 0.8; }
.footer-col h4 { font-size: var(--font-base); font-weight: 600; color: #fff; margin-bottom: var(--gap-md); }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: var(--font-sm); opacity: 0.75; transition: all var(--transition-fast); }
.footer-col ul li a:hover { opacity: 1; color: #fff; }

.footer-friendlinks { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.footer-friendlinks a { font-size: var(--font-xs); opacity: 0.65; transition: opacity var(--transition-fast); }
.footer-friendlinks a:hover { opacity: 1; color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding: var(--gap-lg) 0;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--gap-md); font-size: var(--font-xs); opacity: 0.65;
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { opacity: 1; color: #fff; }
.footer-bottom-nav { display: flex; align-items: center; gap: var(--gap-md); flex-wrap: wrap; }

/* ============================================================
   Friendlinks Block
   ============================================================ */
.friendlinks-block { padding: var(--gap-lg) 0; border-top: 1px solid var(--border-color); }
.friendlinks-block .fl-title { font-size: var(--font-sm); font-weight: 600; color: var(--primary-color); margin-bottom: var(--gap-md); }
.friendlinks-list { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.friendlinks-list a { font-size: var(--font-xs); color: var(--text-secondary); transition: color var(--transition-fast); }
.friendlinks-list a:hover { color: var(--accent-color); }

/* ============================================================
   Empty State
   ============================================================ */
.empty-state { text-align: center; padding: var(--gap-2xl) var(--gap-lg); background: var(--card-bg); border-radius: var(--radius-lg); border: 1px solid var(--border-color); }
.empty-state .empty-icon { font-size: 48px; color: var(--border-color); margin-bottom: var(--gap-md); }
.empty-state .empty-title { font-size: var(--font-xl); font-weight: 600; color: var(--text-color); margin-bottom: var(--gap-sm); }
.empty-state .empty-desc { font-size: var(--font-sm); color: var(--text-secondary); margin-bottom: var(--gap-lg); }
.empty-state .empty-action { display: inline-block; padding: 10px 24px; background: var(--accent-color); color: #fff; border-radius: var(--radius-md); font-size: var(--font-sm); font-weight: 600; transition: opacity var(--transition-fast); }
.empty-state .empty-action:hover { opacity: 0.85; color: #fff; }

/* ============================================================
   Accessibility
   ============================================================ */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent-color); outline-offset: 2px; }
.skip-link { position: absolute; top: -100px; left: 16px; padding: 8px 16px; background: var(--accent-color); color: #fff; font-size: var(--font-sm); font-weight: 600; border-radius: var(--radius-md); z-index: 9999; transition: top var(--transition-fast); }
.skip-link:focus { top: 8px; }

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
.animate-fade-in { animation: fadeIn 0.4s ease forwards; }
.animate-slide-in { animation: slideInRight 0.35s ease forwards; }

img.lazy { opacity: 0; transition: opacity var(--transition-normal); }
img.lazy.loaded { opacity: 1; }

.pure-honeypot { position: absolute; left: -9999px; top: -9999px; opacity: 0; height: 0; width: 0; z-index: -1; }

/* ============================================================
   WP / Z-Blog alignments
   ============================================================ */
.alignleft { float: left; margin: 0 1em 1em 0; }
.alignright { float: right; margin: 0 0 1em 1em; }
.aligncenter { display: block; margin-left: auto; margin-right: auto; }
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: var(--font-xs); color: var(--text-secondary); text-align: center; }

/* ============================================================
   Print
   ============================================================ */
@media print {
  .site-header, .site-footer, .page-sidebar, .comments-section,
  .article-nav, .related-articles, .search-panel, .mobile-nav-overlay { display: none !important; }
  .article-detail { border: none; }
  body { background: #fff; }
}