/* ============================================
   雷赞科技 Leizan Tech - 极简白蓝风
   ============================================ */

:root {
  --primary: #1E5EFF;
  --primary-dark: #0F3FD4;
  --primary-light: #E8F0FF;
  --accent: #0EA5E9;
  --text-dark: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --bg-white: #FFFFFF;
  --bg-gray: #F8FAFC;
  --bg-light: #F1F5F9;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-primary: 0 4px 16px rgba(30, 94, 255, 0.2);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --max-width: 1200px;
  --nav-height: 72px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary); }

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Typography ============ */
.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}

h1, h2, h3, h4, h5 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: 56px; }
h2 { font-size: 40px; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }

p { color: var(--text-body); }

.section-heading {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-heading p { color: var(--text-muted); font-size: 17px; margin-top: 16px; }

.section-heading.split {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  text-align: left;
  max-width: 100%;
}

.section-heading.split > div:first-child { max-width: 500px; }
.section-heading.split > p { max-width: 400px; margin: 0; }

/* ============ Buttons ============ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.button.primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.button.primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(30, 94, 255, 0.3);
  color: #fff;
}

.button.secondary {
  background: transparent;
  color: var(--text-dark);
  border: 1.5px solid var(--border);
}
.button.secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.button.ghost {
  background: transparent;
  color: var(--primary);
  padding: 10px 0;
}
.button.ghost:hover { color: var(--primary-dark); }

.button.ghost::after { content: "→"; margin-left: 4px; transition: transform 0.2s; }
.button.ghost:hover::after { transform: translateX(4px); }

/* ============ Header ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all 0.3s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

.brand-text strong {
  display: block;
  font-size: 17px;
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.2;
}

.brand-text small {
  display: block;
  font-size: 11px;
  color: var(--text-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav > a, .nav-trigger {
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav > a:hover, .nav-trigger:hover { color: var(--primary); background: var(--primary-light); }
.nav > a.active { color: var(--primary); }

.nav-dropdown { position: relative; }

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu a {
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-body);
  border-radius: var(--radius-sm);
  transition: all 0.15s;
  display: block;
}

.dropdown-menu a:hover { background: var(--primary-light); color: var(--primary); }

.dropdown-group-title {
  grid-column: 1 / -1;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 8px 14px 4px;
}

.header-cta {
  padding: 10px 22px;
  background: var(--primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
  flex-shrink: 0;
}
.header-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }

.menu-button {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-button span {
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  padding: 24px;
  overflow-y: auto;
  z-index: 999;
}

.mobile-nav.open { display: block; }

.mobile-nav a {
  display: block;
  padding: 16px 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border-light);
}

.mobile-nav-group strong {
  display: block;
  padding: 16px 0 8px;
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.mobile-nav-group a { padding-left: 12px; font-size: 15px; color: var(--text-body); }

/* ============ Hero ============ */
.hero {
  padding: calc(var(--nav-height) + 80px) 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(30, 94, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 56px;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text-dark) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-copy {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.proof-strip {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.proof-strip span {
  font-size: 14px;
  color: var(--text-muted);
}

.proof-strip strong {
  color: var(--text-dark);
  font-size: 20px;
  font-weight: 700;
  display: block;
}

.hero-visual {
  position: relative;
}

.hero-visual-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.hero-visual-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, rgba(30, 94, 255, 0.1), transparent);
  border-radius: var(--radius-lg);
  z-index: -1;
}

.hero-stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.hero-stat {
  padding: 20px;
  background: var(--bg-gray);
  border-radius: var(--radius-md);
}

.hero-stat .num {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat .label { font-size: 13px; color: var(--text-muted); }

.hero-floating {
  position: absolute;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-md);
  font-size: 13px;
}

.hero-floating.one { top: -20px; right: -20px; }
.hero-floating.two { bottom: -20px; left: -20px; }

.hero-floating strong { display: block; color: var(--text-dark); font-size: 14px; margin-top: 2px; }
.hero-floating span { color: var(--text-muted); }

/* ============ Sections ============ */
.section {
  padding: 100px 0;
}

.section.alt { background: var(--bg-gray); }

.section.dark {
  background: var(--text-dark);
  color: #fff;
}
.section.dark h2, .section.dark h3 { color: #fff; }
.section.dark p { color: rgba(255,255,255,0.7); }
.section.dark .eyebrow { color: var(--accent); }

/* ============ Trust Bar ============ */
.trust-bar {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.trust-bar .container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  text-align: center;
}

.trust-item .num {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1;
  margin-bottom: 8px;
}

.trust-item .label {
  font-size: 14px;
  color: var(--text-muted);
}

/* ============ Cards Grid ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.card .card-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.card .card-icon svg { width: 24px; height: 24px; }

.card h3 { margin-bottom: 12px; font-size: 20px; }
.card p { color: var(--text-muted); font-size: 15px; margin-bottom: 16px; }

.card .card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.card .card-link::after { content: "→"; transition: transform 0.2s; }
.card:hover .card-link::after { transform: translateX(4px); }

.card.featured {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: transparent;
  color: #fff;
}
.card.featured h3 { color: #fff; }
.card.featured p { color: rgba(255,255,255,0.8); }
.card.featured .card-icon { background: rgba(255,255,255,0.15); color: #fff; }
.card.featured .card-link { color: #fff; }

.card.personal {
  background: var(--bg-gray);
  border-color: var(--border-light);
}

.card .badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 10px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  border-radius: 20px;
}

/* ============ Solution Section ============ */
.solution-section { padding: 100px 0; }

.solution-group-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 24px;
}

.solution-group-label.personal {
  background: #F0FDF4;
  color: #16A34A;
}

.solution-group { margin-bottom: 64px; }
.solution-group:last-child { margin-bottom: 0; }

/* ============ Process Steps ============ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-step {
  text-align: center;
  padding: 32px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
}

.process-step .step-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  letter-spacing: 0.1em;
}

.process-step h3 { font-size: 18px; margin-bottom: 10px; }
.process-step p { font-size: 14px; color: var(--text-muted); }

/* ============ Deliverables ============ */
.deliverable-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.deliverable-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s;
}

.deliverable-item:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }

.deliverable-item .check {
  width: 24px;
  height: 24px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 700;
}

.deliverable-item h4 { font-size: 15px; margin-bottom: 4px; }
.deliverable-item p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* ============ Engagement Models ============ */
.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.model-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all 0.3s;
  position: relative;
}

.model-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.model-card.recommended {
  border-color: var(--primary);
  box-shadow: var(--shadow-primary);
}

.model-card .recommend-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
}

.model-card .model-price {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.model-card h3 { font-size: 22px; margin-bottom: 12px; }
.model-card p { color: var(--text-muted); font-size: 15px; margin-bottom: 20px; }

.model-card ul { margin-bottom: 24px; }
.model-card li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 8px;
}
.model-card li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 700;
}

/* ============ Team ============ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.team-card {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s;
}

.team-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 32px;
  font-weight: 700;
  flex-shrink: 0;
}

.team-info h3 { font-size: 20px; margin-bottom: 4px; }
.team-info .role { font-size: 14px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.team-info p { font-size: 14px; color: var(--text-muted); margin: 0; }

/* ============ CTA Section ============ */
.cta-section {
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(30, 94, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 { font-size: 44px; margin-bottom: 20px; }
.cta-section p { font-size: 18px; color: var(--text-muted); margin-bottom: 36px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-section .note { font-size: 13px; color: var(--text-light); margin-top: 20px; }

/* ============ Footer ============ */
.footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.7);
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand strong {
  color: #fff;
  font-size: 20px;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); margin: 0; }

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* ============ Page Header (内页) ============ */
.page-header {
  padding: calc(var(--nav-height) + 60px) 0 60px;
  text-align: center;
  background: var(--bg-gray);
  border-bottom: 1px solid var(--border);
}

.page-header h1 { font-size: 44px; margin-bottom: 16px; }
.page-header p { font-size: 18px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }

.breadcrumb {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }

/* ============ Article List ============ */
.article-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.article-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s;
}

.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.article-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--primary-light), var(--bg-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 48px;
}

.article-body { padding: 24px; }

.article-meta {
  display: flex;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.article-meta .tag {
  color: var(--primary);
  font-weight: 600;
}

.article-card h3 { font-size: 18px; margin-bottom: 10px; line-height: 1.4; }
.article-card p { font-size: 14px; color: var(--text-muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ============ Article Detail ============ */
.article-detail {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px;
}

.article-detail h1 { font-size: 36px; margin-bottom: 20px; }
.article-detail .article-meta { margin-bottom: 32px; }
.article-detail .content { font-size: 17px; line-height: 1.9; }
.article-detail .content p { margin-bottom: 24px; }
.article-detail .content h2 { font-size: 28px; margin: 40px 0 16px; }
.article-detail .content h3 { font-size: 22px; margin: 32px 0 12px; }
.article-detail .content ul, .article-detail .content ol { margin-bottom: 24px; padding-left: 24px; }
.article-detail .content li { margin-bottom: 8px; list-style: disc; }

/* ============ Contact ============ */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info h3 { font-size: 24px; margin-bottom: 24px; }

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
  align-items: flex-start;
}

.contact-item .icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item h4 { font-size: 15px; margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--text-muted); margin: 0; }

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
  background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group textarea { resize: vertical; min-height: 100px; }

/* ============ Tabs ============ */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
  justify-content: center;
}

.tab-btn {
  padding: 12px 24px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.2s;
}

.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-btn:hover { color: var(--primary); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ============ Animations ============ */
.fade-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ Pagination ============ */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.pagination a, .pagination span {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-body);
  transition: all 0.2s;
}

.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  h1 { font-size: 44px; }
  h2 { font-size: 32px; }
  .hero .container { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 500px; margin: 0 auto; }
  .card-grid, .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .deliverable-grid { grid-template-columns: repeat(2, 1fr); }
  .model-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .article-list { grid-template-columns: repeat(2, 1fr); }
  .trust-bar .container { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .contact-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  .section { padding: 64px 0; }
  .hero { padding: calc(var(--nav-height) + 48px) 0 64px; }
  .hero-content h1 { font-size: 36px; }
  .hero-copy { font-size: 16px; }
  .nav, .header-cta { display: none; }
  .menu-button { display: flex; }
  .card-grid, .card-grid.cols-2, .card-grid.cols-4 { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .deliverable-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .article-list { grid-template-columns: 1fr; }
  .trust-bar .container { grid-template-columns: repeat(2, 1fr); }
  .section-heading.split { flex-direction: column; gap: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .cta-section h2 { font-size: 32px; }
  .proof-strip { gap: 20px; }
  .proof-strip strong { font-size: 18px; }
  .hero-floating { display: none; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}