/* ============================================================
   邑泊ERP 官方网站 - 主样式文件
   Tech-modern professional blue & white theme
   ============================================================ */

/* ---- 1. CSS Variables ---- */
:root {
  --primary: #1d4ed8;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --navy: #1e3a8a;
  --navy-dark: #0f2057;
  --cyan: #06b6d4;
  --cyan-light: #22d3ee;
  --white: #ffffff;
  --bg: #f8fafc;
  --bg-blue: #eff6ff;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 12px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-blue: 0 4px 20px rgba(29,78,216,0.25);
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;
  --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --container: 1200px;
  --nav-h: 72px;
}

/* ---- 2. Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
h1,h2,h3,h4,h5,h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}
h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ---- 3. Layout ---- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.section-lg { padding: 100px 0; }
.section-white { background: var(--white); }
.section-gray { background: var(--bg); }
.section-blue { background: var(--bg-blue); }
.section-navy { background: var(--navy-dark); color: var(--white); }
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.gap-8 { gap: 32px; }

/* ---- 4. Section Headers ---- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .section-tag {
  display: inline-block;
  background: var(--bg-blue);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}
.section-header h2 { color: var(--navy); margin-bottom: 16px; }
.section-header p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
.section-header .accent-line {
  width: 56px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  border-radius: var(--radius-full);
  margin: 16px auto 0;
}

/* ---- 5. Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: var(--font);
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(29,78,216,0.35);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}
.btn-white {
  background: var(--white);
  color: var(--primary);
  font-weight: 700;
}
.btn-white:hover {
  background: var(--bg-blue);
  color: var(--primary-dark);
}
.btn-ghost {
  background: rgba(255,255,255,0.12);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.2);
  color: var(--white);
}
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 14px 36px; font-size: 1.05rem; }
.btn-icon { width: 40px; height: 40px; padding: 0; border-radius: var(--radius-full); justify-content: center; }

/* ---- 6. Navigation ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-lg); }
.header-inner {
  display: flex;
  align-items: center;
  height: var(--nav-h);
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--navy));
  color: var(--white);
  font-size: 1rem;
  font-weight: 800;
  border-radius: var(--radius);
  letter-spacing: -0.5px;
}
.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.5px;
}
.logo-sub { font-size: 0.7rem; color: var(--text-muted); display: block; }
.main-nav { flex: 1; }
.main-nav > ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li > a.active {
  color: var(--primary);
  background: var(--bg-blue);
}
.nav-arrow { font-size: 0.7rem; transition: transform var(--transition); }
.has-dropdown:hover .nav-arrow { transform: rotate(180deg); }
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition);
  z-index: 200;
}
.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.dropdown li a:hover {
  background: var(--bg-blue);
  color: var(--primary);
}
.dropdown li a .dd-icon {
  width: 28px;
  height: 28px;
  background: var(--bg-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.header-cta { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 999;
  overflow-y: auto;
  padding: 24px;
}
.mobile-menu.open { display: block; }
.mobile-nav-list { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-list li a {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.mobile-nav-list li a:hover { background: var(--bg-blue); color: var(--primary); }
.mobile-sub { padding-left: 16px; }
.mobile-sub li a { font-size: 0.9rem; color: var(--text-secondary); }
.mobile-cta { display: flex; flex-direction: column; gap: 10px; margin-top: 24px; }
.mobile-cta .btn { width: 100%; justify-content: center; }
.mobile-section-divider { margin: 16px 0; border: none; border-top: 1px solid var(--border); }

/* ---- 7. Hero Section ---- */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, #1a4e92 100%);
  position: relative;
  overflow: hidden;
  padding: 100px 0 80px;
  color: var(--white);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(6,182,212,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(59,130,246,0.2) 0%, transparent 50%);
}
.hero-grid {
  background-image: 
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  position: absolute;
  inset: 0;
}
.hero-content { position: relative; z-index: 2; }
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6,182,212,0.2);
  border: 1px solid rgba(6,182,212,0.4);
  color: var(--cyan-light);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.hero h1 {
  color: var(--white);
  margin-bottom: 20px;
  line-height: 1.2;
}
.hero h1 .gradient-text {
  background: linear-gradient(90deg, #60a5fa, var(--cyan-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 36px; line-height: 1.8; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.hero-stat .num span { color: var(--cyan-light); }
.hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.65); margin-top: 4px; }
.hero-visual { position: relative; }
.hero-mockup {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  backdrop-filter: blur(8px);
}
.hero-mockup-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.hero-mockup-dot { width: 10px; height: 10px; border-radius: 50%; }
.hero-mockup-dot:nth-child(1) { background: #ef4444; }
.hero-mockup-dot:nth-child(2) { background: #f59e0b; }
.hero-mockup-dot:nth-child(3) { background: #10b981; }
.hero-mockup-inner { padding: 20px; }
.hero-dashboard { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 14px;
}
.hero-card .card-icon { font-size: 1.5rem; margin-bottom: 6px; }
.hero-card .card-val { font-size: 1.3rem; font-weight: 700; color: var(--white); }
.hero-card .card-lbl { font-size: 0.75rem; color: rgba(255,255,255,0.6); }
.hero-card .card-trend { font-size: 0.75rem; color: #34d399; margin-top: 4px; }
.hero-badge {
  position: absolute;
  bottom: -16px;
  right: -16px;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-xl);
}
.hero-badge-icon { font-size: 1.4rem; }
.hero-badge-text { font-size: 0.8rem; }
.hero-badge-text strong { display: block; color: var(--navy); font-size: 0.95rem; }
.hero-badge-text span { color: var(--text-muted); }
/* Sub-page hero */
.page-hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  padding: 60px 0;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 50%, rgba(6,182,212,0.15), transparent 60%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: var(--white); margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 600px; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
}
.breadcrumb a { color: rgba(255,255,255,0.75); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb .current { color: rgba(255,255,255,0.9); }

/* ---- 8. Cards ---- */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: transparent;
}
.card-body { padding: 24px; }
.card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  transform: scaleX(0);
  transition: transform var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); border-color: transparent; }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 52px; height: 52px;
  background: var(--bg-blue);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  transition: all var(--transition);
}
.feature-card:hover .feature-icon { background: var(--primary); }
.feature-card h3 { margin-bottom: 10px; font-size: 1.1rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6; margin-bottom: 0; }
.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition);
}
.product-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); }
.product-card-header {
  padding: 28px;
  background: linear-gradient(135deg, var(--bg-blue), var(--white));
  border-bottom: 1px solid var(--border);
}
.product-card-body { padding: 24px; }
.product-badge {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.product-badge.badge-cyan { background: var(--cyan); }
.product-badge.badge-navy { background: var(--navy); }
.product-badge.badge-green { background: var(--success); }
.product-features-list { list-style: none; }
.product-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}
.product-features-list li:last-child { border-bottom: none; }
.product-features-list li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ---- 9. News Grid ---- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.news-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: transparent; }
.news-card-img {
  position: relative;
  overflow: hidden;
}
.news-card-img-wrap {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.news-card-body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.news-cat-tag {
  display: inline-block;
  background: var(--bg-blue);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}
.news-date { font-size: 0.78rem; color: var(--text-muted); }
.news-card h3 { font-size: 0.92rem; line-height: 1.45; margin-bottom: 8px; flex: 1; }
.news-card h3 a { color: var(--text); }
.news-card h3 a:hover { color: var(--primary); }
.news-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--border-light);
}
.news-read-more { font-size: 0.8rem; color: var(--primary); font-weight: 600; }

/* ---- 10. Article Layout ---- */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}
.article-main { min-width: 0; }
.article-sidebar { min-width: 0; }

/* Article Content */
.article-header { margin-bottom: 32px; }
.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.article-meta-bar .meta-item { display: flex; align-items: center; gap: 5px; }
.article-cat-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-blue);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid #dbeafe;
  transition: all var(--transition);
}
.article-cat-link:hover { background: var(--primary); color: var(--white); }
.article-h1 { font-size: clamp(1.4rem, 3vw, 2rem); color: var(--navy); margin-bottom: 16px; line-height: 1.35; }
.article-body { font-size: 1rem; line-height: 1.85; color: var(--text-secondary); }
.article-body h2 {
  font-size: 1.4rem;
  color: var(--navy);
  margin: 32px 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}
.article-body h3 {
  font-size: 1.15rem;
  color: var(--text);
  margin: 24px 0 10px;
}
.article-body h4 { font-size: 1rem; margin: 20px 0 8px; }
.article-body p { margin-bottom: 1.2rem; }
.article-body ul, .article-body ol {
  margin: 14px 0 18px 20px;
  list-style: disc;
}
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; color: var(--text-secondary); }
.article-body strong { color: var(--text); font-weight: 600; }
.article-body a { color: var(--primary); text-decoration: underline; text-decoration-color: transparent; }
.article-body a:hover { text-decoration-color: var(--primary); }
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-blue);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9rem;
}
.article-body th {
  background: var(--navy);
  color: var(--white);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}
.article-body td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}
.article-body tr:hover td { background: var(--bg-blue); }
.article-body .highlight-box {
  background: var(--bg-blue);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 20px;
  margin: 24px 0;
}
.article-body .warning-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: 20px;
  margin: 24px 0;
}
.article-body .tip-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 20px;
  margin: 24px 0;
}
.article-tags-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  margin-top: 32px;
}
.article-tags-footer .label { font-weight: 600; color: var(--text); font-size: 0.9rem; margin-right: 4px; }
.tag-link {
  display: inline-block;
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  transition: all var(--transition);
}
.tag-link:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}
.article-nav-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.article-nav-item:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.article-nav-item.next { text-align: right; }
.article-nav-label { font-size: 0.78rem; color: var(--text-muted); }
.article-nav-title { font-size: 0.9rem; color: var(--text); font-weight: 500; line-height: 1.4; }
.article-nav-title:hover { color: var(--primary); }

/* ---- 11. Sidebar ---- */
.sidebar-widget {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
}
.widget-header {
  padding: 14px 18px;
  background: linear-gradient(90deg, var(--navy), var(--primary));
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.widget-header .widget-icon { font-size: 1rem; }
.widget-body { padding: 16px; }
.cat-list { display: flex; flex-direction: column; gap: 2px; }
.cat-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  font-size: 0.87rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.cat-list a:hover { background: var(--bg-blue); color: var(--primary); }
.cat-list a .cat-count {
  background: var(--bg);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 1px 7px;
  border-radius: var(--radius-full);
}
.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-cloud .tag-link { font-size: 0.78rem; padding: 3px 10px; }
/* Article list in sidebar (compact) */
.sidebar-article-list { display: flex; flex-direction: column; }
.sidebar-article-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
}
.sidebar-article-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-art-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: var(--bg-blue);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}
.sidebar-article-item:nth-child(1) .sidebar-art-num,
.sidebar-article-item:nth-child(2) .sidebar-art-num,
.sidebar-article-item:nth-child(3) .sidebar-art-num { background: var(--primary); color: var(--white); }
.sidebar-art-content { flex: 1; min-width: 0; }
.sidebar-art-title {
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--text);
  display: block;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  transition: color var(--transition);
}
.sidebar-art-title:hover { color: var(--primary); }
.sidebar-art-date { font-size: 0.72rem; color: var(--text-muted); margin-top: 3px; }
/* Knowledge Base */
.kb-list { display: flex; flex-direction: column; gap: 2px; }
.kb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.kb-item:hover { background: var(--bg-blue); color: var(--primary); }
.kb-item::before { content: '📖'; font-size: 0.85rem; }

/* ---- 12. Ad Placeholders ---- */
.ad-placeholder {
  background: repeating-linear-gradient(
    45deg,
    #f8fafc,
    #f8fafc 10px,
    #f1f5f9 10px,
    #f1f5f9 20px
  );
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 12px;
  position: relative;
  overflow: hidden;
}
.ad-placeholder::before {
  content: '广告位';
  position: absolute;
  top: 6px; left: 8px;
  background: var(--primary);
  color: var(--white);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}
.ad-placeholder .ad-icon { font-size: 1.5rem; opacity: 0.4; }
.ad-placeholder .ad-size { font-size: 0.72rem; color: var(--text-muted); }
/* Ad sizes */
.ad-leaderboard { width: 100%; height: 90px; }
.ad-billboard { width: 100%; height: 120px; }
.ad-medium-rect { width: 100%; height: 250px; }
.ad-half-page { width: 100%; height: 600px; }
.ad-banner-sm { width: 100%; height: 60px; }
.ad-square { width: 100%; height: 200px; }
.ad-wide { width: 100%; height: 150px; }

/* Inline ads in article */
.article-ad-inline {
  margin: 28px 0;
}
.article-ad-inline .ad-placeholder { border-radius: var(--radius-lg); }

/* ---- 13. Image Placeholders ---- */
.img-placeholder {
  background: repeating-linear-gradient(
    45deg,
    #e2e8f0,
    #e2e8f0 8px,
    #f1f5f9 8px,
    #f1f5f9 16px
  );
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}
.img-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.3);
}
.img-placeholder .ph-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.85);
  padding: 12px 20px;
  border-radius: var(--radius);
  backdrop-filter: blur(4px);
}
.img-placeholder .ph-icon { font-size: 2rem; opacity: 0.5; }
.img-placeholder .ph-text { font-size: 0.8rem; color: var(--text-secondary); font-weight: 500; }
.img-placeholder .ph-size { font-size: 0.7rem; color: var(--text-muted); }
.img-16-9 { aspect-ratio: 16/9; width: 100%; }
.img-4-3 { aspect-ratio: 4/3; width: 100%; }
.img-1-1 { aspect-ratio: 1/1; }
.img-3-2 { aspect-ratio: 3/2; width: 100%; }
.img-caption {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-style: italic;
}

/* ---- 14. Features & Benefits ---- */
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.benefit-item { text-align: center; }
.benefit-num {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}
.benefit-item p { font-size: 0.9rem; color: var(--text-secondary); }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.why-features { display: flex; flex-direction: column; gap: 20px; }
.why-feature {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.why-feature:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.why-feature-icon {
  width: 44px; height: 44px;
  background: var(--bg-blue);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.why-feature-text h4 { margin-bottom: 4px; font-size: 1rem; }
.why-feature-text p { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 0; }

/* ---- 15. Testimonials ---- */
.testimonial-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  position: relative;
}
.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 16px; right: 24px;
  font-size: 5rem;
  line-height: 1;
  color: var(--bg-blue);
  font-family: serif;
}
.testimonial-stars { color: #f59e0b; font-size: 1rem; margin-bottom: 16px; }
.testimonial-text { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.75; margin-bottom: 20px; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.testimonial-author-info strong { display: block; font-size: 0.95rem; }
.testimonial-author-info span { font-size: 0.82rem; color: var(--text-muted); }

/* ---- 16. Solutions Cards ---- */
.solution-card {
  display: flex;
  gap: 24px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  transition: all var(--transition);
}
.solution-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-3px); border-color: transparent; }
.solution-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--navy));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  flex-shrink: 0;
}
.solution-content h3 { margin-bottom: 8px; }
.solution-content p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; }
.solution-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.solution-tag {
  background: var(--bg-blue);
  color: var(--primary);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

/* ---- 17. Pricing/Modules ---- */
.module-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.module-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  transition: all var(--transition);
}
.module-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.module-icon { font-size: 2.5rem; margin-bottom: 12px; }
.module-card h4 { font-size: 0.95rem; margin-bottom: 6px; }
.module-card p { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 0; }

/* ---- 18. Contact ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; }
.contact-icon {
  width: 44px; height: 44px;
  background: var(--bg-blue);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-item-text strong { display: block; margin-bottom: 4px; }
.contact-item-text span { font-size: 0.9rem; color: var(--text-secondary); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-label { font-size: 0.88rem; font-weight: 500; color: var(--text); }
.form-input, .form-select, .form-textarea {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--text);
  background: var(--white);
  transition: all var(--transition);
  font-family: var(--font);
  width: 100%;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29,78,216,0.1);
}
.form-textarea { resize: vertical; min-height: 120px; }

/* ---- 19. Partners ---- */
.partners-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
}
.partner-logo {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 24px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition);
}
.partner-logo:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow); }

/* ---- 20. CTA Section ---- */
.cta-section {
  background: linear-gradient(135deg, var(--navy-dark), var(--navy), #1a4e92);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(6,182,212,0.2), transparent 70%);
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: var(--white); margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 500px; margin: 0 auto 32px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---- 21. Footer ---- */
.site-footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.8);
}
.footer-main { padding: 64px 0 40px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: 40px;
}
.footer-brand { }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.footer-logo .logo-mark { width: 36px; height: 36px; font-size: 0.9rem; }
.footer-logo .logo-text { color: var(--white); font-size: 1.3rem; }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); margin-bottom: 20px; }
.social-links { display: flex; gap: 10px; }
.social-link {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  transition: all var(--transition);
}
.social-link:hover { background: var(--primary); border-color: var(--primary); color: var(--white); }
.footer-col h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: rgba(255,255,255,0.95); }
.footer-contact-info { display: flex; flex-direction: column; gap: 10px; }
.footer-contact-info .ci { display: flex; align-items: flex-start; gap: 10px; font-size: 0.85rem; color: rgba(255,255,255,0.6); }
.footer-contact-info .ci-icon { flex-shrink: 0; margin-top: 2px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom-inner a { color: rgba(255,255,255,0.6); }
.footer-bottom-inner a:hover { color: var(--white); }
.footer-links-strip { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.footer-links-strip .sep { opacity: 0.3; }
.friendly-links { margin-top: 28px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.82rem; }
.friendly-links .fl-label { color: rgba(255,255,255,0.5); margin-bottom: 8px; }
.friendly-links .fl-list { display: flex; flex-wrap: wrap; gap: 10px; }
.friendly-links .fl-list a { color: rgba(255,255,255,0.5); transition: color var(--transition); }
.friendly-links .fl-list a:hover { color: rgba(255,255,255,0.85); }
.friendly-links .fl-sep { color: rgba(255,255,255,0.25); }

/* ---- 22. About Page ---- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card {
  text-align: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 16px;
  transition: all var(--transition);
}
.team-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.team-avatar {
  width: 80px; height: 80px;
  background: linear-gradient(135deg, var(--primary), var(--navy));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
  margin: 0 auto 16px;
}
.timeline { display: flex; flex-direction: column; gap: 0; position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline-item { display: flex; gap: 24px; padding-bottom: 32px; position: relative; }
.timeline-dot {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.timeline-content { flex: 1; }
.timeline-year { font-size: 0.8rem; color: var(--primary); font-weight: 700; margin-bottom: 4px; }
.timeline-title { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.timeline-desc { font-size: 0.87rem; color: var(--text-secondary); }

/* ---- 23. Product Detail ---- */
.product-hero { padding: 80px 0; background: linear-gradient(135deg, var(--bg-blue), var(--white)); }
.product-hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.product-feature-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.tab-btn {
  padding: 8px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  background: var(--white);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn.active, .tab-btn:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.spec-table { width: 100%; }
.spec-table tr { border-bottom: 1px solid var(--border); }
.spec-table td { padding: 12px 16px; font-size: 0.9rem; }
.spec-table td:first-child { color: var(--text-muted); width: 35%; font-weight: 500; }
.spec-table td:last-child { color: var(--text); }

/* ---- 24. Category Pages ---- */
.category-header-info {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.category-icon-lg {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--navy));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
}

/* ---- 25. Tags Page ---- */
.tags-section { padding: 48px 0; }
.tag-group { margin-bottom: 32px; }
.tag-group-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.tags-cloud-large { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-item-lg {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid;
  transition: all var(--transition);
}
.tag-item-lg.size-xl { font-size: 1.1rem; padding: 8px 22px; }
.tag-item-lg.size-lg { font-size: 0.95rem; padding: 7px 18px; }
.tag-item-lg.size-md { font-size: 0.85rem; }
.tag-item-lg.size-sm { font-size: 0.75rem; padding: 5px 12px; }
.tag-item-lg.color-1 { background: #eff6ff; color: #1d4ed8; border-color: #bfdbfe; }
.tag-item-lg.color-2 { background: #f0fdf4; color: #15803d; border-color: #bbf7d0; }
.tag-item-lg.color-3 { background: #fef3c7; color: #b45309; border-color: #fde68a; }
.tag-item-lg.color-4 { background: #fdf4ff; color: #9333ea; border-color: #e9d5ff; }
.tag-item-lg.color-5 { background: #fff1f2; color: #e11d48; border-color: #fecdd3; }
.tag-item-lg:hover { transform: scale(1.05); box-shadow: var(--shadow); }

/* ---- 26. Pagination ---- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 48px;
}
.page-btn {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--white);
  font-size: 0.88rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.page-btn:hover, .page-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.page-btn.prev, .page-btn.next { width: auto; padding: 0 14px; gap: 4px; }

/* ---- 27. Floating Elements ---- */
.floating-contact {
  position: fixed;
  right: 20px;
  bottom: 80px;
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.floating-btn {
  width: 48px; height: 48px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.floating-btn:hover { background: var(--primary-dark); color: var(--white); transform: scale(1.1); }
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 44px; height: 44px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-secondary);
  cursor: pointer;
  box-shadow: var(--shadow);
  z-index: 500;
  transition: all var(--transition);
  opacity: 0;
  pointer-events: none;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* ---- 28. Animations ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.animate-fade-up { animation: fadeInUp 0.6s ease both; }
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* ---- 29. Utility Classes ---- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary); }
.text-navy { color: var(--navy); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--white); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.w-full { width: 100%; }
.hidden { display: none; }

/* ---- 30. Responsive ---- */
@media (max-width: 1200px) {
  :root { --container: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .module-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
  .main-nav, .header-cta { display: none; }
  .mobile-menu-toggle { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .product-hero-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { order: 2; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .article-nav { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .solution-card { flex-direction: column; }
  .why-grid { gap: 28px; }
  .hero { padding: 72px 0 56px; }
  .hero-stats { gap: 24px; }
  .hero-stat .num { font-size: 1.7rem; }
  .module-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .cta-actions { flex-direction: column; align-items: center; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  .grid-4 { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-lg { padding: 12px 24px; font-size: 0.95rem; }
}

/* ================================================================
   ARTICLE LAYOUT
   ================================================================ */
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
@media (max-width: 992px) { .article-layout { grid-template-columns: 1fr; } }
.article-main { min-width: 0; }
.article-sidebar { position: sticky; top: 90px; max-height: calc(100vh - 100px); overflow-y: auto; }
@media (max-width: 992px) { .article-sidebar { position: static; max-height: none; } }

.article-h1 { font-size: 2rem; line-height: 1.3; margin: 12px 0 16px; color: var(--navy-dark); }
.article-meta-bar { display: flex; gap: 16px; flex-wrap: wrap; color: var(--text-muted); font-size: 0.85rem; margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.meta-item { display: flex; align-items: center; gap: 4px; }

.article-body { line-height: 1.9; color: var(--text); }
.article-body h2 { font-size: 1.4rem; margin: 32px 0 12px; color: var(--navy); border-left: 4px solid var(--primary); padding-left: 12px; }
.article-body h3 { font-size: 1.15rem; margin: 24px 0 10px; color: var(--primary); }
.article-body p { margin-bottom: 16px; }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 16px; }
.article-body li { margin-bottom: 6px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.92rem; }
.article-body table th { background: var(--primary); color: white; padding: 12px 16px; text-align: left; font-weight: 600; }
.article-body table td { padding: 10px 16px; border-bottom: 1px solid var(--border); }
.article-body table tr:nth-child(even) { background: var(--bg-light); }
.article-body blockquote { border-left: 4px solid var(--primary); padding: 12px 20px; margin: 20px 0; background: var(--primary-50); border-radius: 0 var(--radius) var(--radius) 0; font-style: italic; color: var(--text-muted); }

.highlight-box { background: var(--primary-50); border: 1px solid var(--primary-200); border-radius: var(--radius-lg); padding: 16px 20px; margin: 20px 0; }
.tip-box { background: #f0fdf4; border: 1px solid #86efac; border-radius: var(--radius-lg); padding: 16px 20px; margin: 16px 0; }
.img-caption { font-size: 0.82rem; color: var(--text-muted); text-align: center; margin-top: -16px; margin-bottom: 20px; font-style: italic; }
.article-ad-inline { margin: 28px 0; }

.article-tags-footer { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 20px 0; border-top: 1px solid var(--border); margin-top: 32px; }
.article-tags-footer .label { font-weight: 600; font-size: 0.9rem; color: var(--text-muted); }

.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 32px; }
@media (max-width: 600px) { .article-nav { grid-template-columns: 1fr; } }
.article-nav-item { display: flex; flex-direction: column; padding: 16px 20px; background: var(--bg-light); border: 1px solid var(--border); border-radius: var(--radius-lg); text-decoration: none; transition: all 0.2s; }
.article-nav-item:hover { background: var(--primary-50); border-color: var(--primary); }
.article-nav-item.next { text-align: right; }
.article-nav-label { font-size: 0.78rem; color: var(--text-muted); font-weight: 600; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.05em; }
.article-nav-title { font-size: 0.88rem; color: var(--text); font-weight: 500; line-height: 1.4; }

/* Category list */
.cat-list { display: flex; flex-direction: column; gap: 2px; }
.cat-list a { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; border-radius: var(--radius); color: var(--text); font-size: 0.9rem; text-decoration: none; transition: background 0.2s; }
.cat-list a:hover { background: var(--primary-50); color: var(--primary); }
.cat-count { background: var(--primary-100); color: var(--primary); border-radius: 20px; padding: 2px 8px; font-size: 0.75rem; font-weight: 600; }

/* Knowledge base list */
.kb-list { display: flex; flex-direction: column; gap: 4px; }
.kb-item { display: block; padding: 8px 12px; border-radius: var(--radius); color: var(--text); font-size: 0.88rem; text-decoration: none; border: 1px solid var(--border); transition: all 0.2s; }
.kb-item:hover { background: var(--primary); color: white; border-color: var(--primary); }

/* Tag size variants */
.tag-xl { font-size: 1.1rem !important; font-weight: 700; padding: 6px 16px !important; }
.tag-lg { font-size: 0.95rem !important; font-weight: 600; }

/* Sidebar article wrapper */
.sidebar-art-content { flex: 1; min-width: 0; }

/* Article category pill link */
.article-cat-link { display: inline-block; background: var(--primary-100); color: var(--primary); padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; text-decoration: none; margin-bottom: 8px; }
.article-cat-link:hover { background: var(--primary); color: white; }

/* ================================================================
   PRODUCT / SOLUTION PAGES
   ================================================================ */
.feature-list { display: flex; flex-direction: column; gap: 20px; }
.feature-item { display: flex; gap: 16px; align-items: flex-start; }
.fi-icon { font-size: 1.8rem; flex-shrink: 0; line-height: 1; }

.product-features { list-style: none; padding: 0; margin: 0 0 20px; }
.product-features li { padding: 7px 0; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.product-features li::before { content: "✓ "; color: var(--primary); font-weight: 700; }

.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 900px) { .products-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .products-grid { grid-template-columns: 1fr; } }

/* Solution cards */
.solution-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-xl); overflow: hidden; transition: box-shadow 0.2s, transform 0.2s; }
.solution-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.solution-card-body { padding: 24px; }

/* ================================================================
   BUTTONS FOR DARK BACKGROUNDS
   ================================================================ */
.btn-white { background: white; color: var(--primary); border: 2px solid white; }
.btn-white:hover { background: var(--primary-50); border-color: var(--primary-50); }
.btn-outline-white { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.7); }
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: white; }

/* ================================================================
   SECTION VARIANTS
   ================================================================ */
.section-blue-light { background: var(--primary-50); }
.section-blue-dark { background: var(--navy-dark); color: white; }

/* ================================================================
   FLOATING CONTACT BUTTON
   ================================================================ */
.floating-contact { position: fixed; bottom: 80px; right: 24px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.floating-btn { display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; background: var(--primary); color: white; border-radius: 50%; text-decoration: none; font-size: 1.2rem; box-shadow: 0 4px 16px rgba(29,78,216,0.4); transition: transform 0.2s, box-shadow 0.2s; }
.floating-btn:hover { transform: scale(1.1); box-shadow: 0 6px 24px rgba(29,78,216,0.5); }

/* ================================================================
   ADDITIONAL MISC
   ================================================================ */
.primary-100 { background: var(--primary-100); }

/* Ensure var(--primary-50) and var(--primary-100) are available */
:root {
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --navy-dark: #0f172a;
}