/* ============================================================
   才识科技官网 — 全局样式
   参考微软合作伙伴网站风格
   ============================================================ */

:root {
  --primary: #0078D4;
  --primary-dark: #005A9E;
  --primary-darker: #003F73;
  --primary-light: #EFF6FC;
  --primary-mid: #C7E0F4;
  --secondary: #00B294;
  --secondary-dark: #008272;
  --accent: #7B2FBE;
  --navy: #1B2A4A;
  --navy-dark: #0D1B2A;
  --text-primary: #201F1E;
  --text-secondary: #605E5C;
  --text-light: #A19F9D;
  --white: #FFFFFF;
  --bg-light: #F5F7FA;
  --bg-section: #F8FAFD;
  --border: #E1DFDD;
  --border-light: #F3F2F1;
  --success: #107C10;
  --warning: #E67E22;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.08);
  --shadow: 0 2px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.14);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.18);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 64px;
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text-primary);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ============ Typography ============ */
h1 { font-size: clamp(2rem, 4.5vw, 3.75rem); font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.625rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.75rem); font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; }
h5 { font-size: 0.9375rem; font-weight: 600; }
p { color: var(--text-secondary); line-height: 1.75; }

/* ============ Layout ============ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 28px; }
.section { padding: 88px 0; }
.section-sm { padding: 56px 0; }
.text-center { text-align: center; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.items-center { align-items: center; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }

/* ============ Section Header ============ */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .eyebrow {
  display: inline-block;
  font-size: 0.8125rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 12px;
  padding: 4px 12px; border-radius: 100px;
  background: var(--primary-light);
}
.section-header h2 { color: var(--text-primary); margin-bottom: 16px; }
.section-header p { font-size: 1.0625rem; color: var(--text-secondary); max-width: 640px; margin: 0 auto; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 26px; border-radius: var(--radius);
  font-size: 0.9375rem; font-weight: 600;
  transition: var(--transition); white-space: nowrap;
  border: 2px solid transparent;
}
.btn-sm { padding: 8px 18px; font-size: 0.875rem; }
.btn-lg { padding: 15px 36px; font-size: 1.0625rem; }
.btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,120,212,0.35); }
.btn-outline { border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-white { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-white:hover { background: var(--primary-light); box-shadow: 0 4px 16px rgba(255,255,255,0.3); }
.btn-outline-white { border-color: rgba(255,255,255,0.7); color: var(--white); }
.btn-outline-white:hover { background: rgba(255,255,255,0.15); }
.btn-secondary { background: var(--secondary); color: var(--white); border-color: var(--secondary); }
.btn-secondary:hover { background: var(--secondary-dark); }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ============ Navigation ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(16px) saturate(1.8);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow); }
.nav-inner {
  max-width: 1320px; margin: 0 auto; padding: 0 28px;
  height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo img { height: 40px; width: auto; object-fit: contain; max-width: 340px; }
.nav-menu { display: flex; align-items: center; gap: 2px; flex: 1; justify-content: center; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 13px; border-radius: 6px;
  font-size: 0.9375rem; font-weight: 500; color: var(--text-primary);
  transition: var(--transition); white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-light); }
.nav-link .caret { width: 14px; height: 14px; transition: transform 0.22s; flex-shrink: 0; }
.nav-item:hover .nav-link .caret { transform: rotate(180deg); }
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* Dropdown */
.dropdown {
  position: absolute; top: calc(100% + 10px); left: 0;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 8px;
  min-width: 230px; box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); z-index: 200;
}
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-link {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 8px;
  font-size: 0.9rem; color: var(--text-primary);
  transition: var(--transition);
}
.dropdown-link:hover { background: var(--bg-light); color: var(--primary); }
.dropdown-icon {
  position: relative;
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(145deg, #2E97F0 0%, #0078D4 55%, #005A9E 100%);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: var(--transition);
  box-shadow: 0 6px 14px rgba(0,90,160,0.28), inset 0 1px 1px rgba(255,255,255,0.5);
}
.dropdown-icon::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(160deg, rgba(255,255,255,0.5) 0%, rgba(255,255,255,0) 50%);
  pointer-events: none;
}
.dropdown-link:hover .dropdown-icon { transform: translateY(-2px) scale(1.05); box-shadow: 0 10px 20px rgba(0,90,160,0.36), inset 0 1px 1px rgba(255,255,255,0.55); }
.dropdown-icon svg { position: relative; z-index: 1; width: 17px; height: 17px; color: #FFFFFF; filter: drop-shadow(0 2px 2px rgba(0,0,0,0.25)); transition: var(--transition); }
.dropdown-text-title { font-weight: 600; font-size: 0.9rem; }
.dropdown-text-desc { font-size: 0.78rem; color: var(--text-light); margin-top: 1px; line-height: 1.3; }
.dropdown-divider { height: 1px; background: var(--border-light); margin: 6px 8px; }

/* Mobile hamburger */
.nav-hamburger {
  display: none; width: 40px; height: 40px;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  border-radius: var(--radius); border: 1px solid var(--border); color: var(--text-primary);
}
.nav-hamburger span {
  display: block; width: 20px; height: 2px;
  background: currentColor; border-radius: 2px; transition: var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu overlay */
.mobile-overlay {
  display: none; position: fixed; inset: 0; top: var(--nav-height);
  background: var(--white); z-index: 999; overflow-y: auto; padding: 16px 24px 32px;
  border-top: 1px solid var(--border);
}
.mobile-overlay.open { display: block; }
.mobile-nav-link {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 4px; border-bottom: 1px solid var(--border-light);
  font-size: 1rem; font-weight: 600; color: var(--text-primary);
}
.mobile-nav-sub { padding-left: 16px; }
.mobile-nav-sub a {
  display: block; padding: 10px 4px; font-size: 0.9375rem;
  color: var(--text-secondary); border-bottom: 1px solid var(--border-light);
}
.mobile-nav-sub a:hover { color: var(--primary); }
.mobile-cta { margin-top: 24px; }

/* ============ HERO ============ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
  background: linear-gradient(135deg, #0A1A2F 0%, #0F2747 35%, #0A2E66 65%, #0D1B2A 100%);
  background-size: 220% 220%;
  animation: heroGradient 20s ease infinite;
}
@keyframes heroGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.hero-video-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0.28; z-index: 0;
  pointer-events: none;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(155deg, rgba(13,27,42,0.82) 0%, rgba(0,82,160,0.5) 60%, rgba(0,120,212,0.3) 100%);
  z-index: 1;
}
/* Animated particles */
.hero-particles {
  position: absolute; inset: 0; z-index: 1; overflow: hidden;
}
.hero-particles::before, .hero-particles::after {
  content: '';
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,178,148,0.15), transparent 70%);
}
.hero-particles::before { width: 600px; height: 600px; top: -200px; right: -100px; animation: float1 8s ease-in-out infinite; }
.hero-particles::after { width: 400px; height: 400px; bottom: -100px; left: 20%; animation: float2 10s ease-in-out infinite; }
@keyframes float1 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(-30px,30px) scale(1.05)} }
@keyframes float2 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(20px,-20px) scale(0.95)} }
.hero-content {
  position: relative; z-index: 2;
  width: 100%; max-width: 1200px; margin: 0 auto; padding: 80px 28px 100px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.22);
  backdrop-filter: blur(8px);
  padding: 7px 18px; border-radius: 100px;
  font-size: 0.875rem; font-weight: 500; color: rgba(255,255,255,0.9);
  margin-bottom: 28px;
}
.hero-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--secondary); flex-shrink: 0; }
.hero-dot-animate { animation: dotPulse 2s ease-in-out infinite; }
@keyframes dotPulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.6;transform:scale(1.3)} }
.hero h1 { color: var(--white); margin-bottom: 24px; }
.hero h1 .hl {
  background: linear-gradient(120deg, #50C8E8 0%, #00E0B8 45%, #8B7CFF 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-desc {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: rgba(255,255,255,0.78); max-width: 560px; margin-bottom: 44px; line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; margin-bottom: 72px; }
.hero-partners-label { font-size: 0.8rem; color: rgba(255,255,255,0.5); font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px; }
.hero-partner-chips { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-partner-chip {
  background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.18);
  border-radius: 100px; padding: 5px 14px;
  font-size: 0.8125rem; font-weight: 600; color: rgba(255,255,255,0.85);
}
.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: rgba(255,255,255,0.45); font-size: 0.78rem; animation: scrollHint 2.5s ease-in-out infinite;
}
@keyframes scrollHint { 0%,100%{transform:translateX(-50%) translateY(0);opacity:0.5} 50%{transform:translateX(-50%) translateY(6px);opacity:1} }
.hero-scroll-hint svg { width: 20px; height: 20px; }

/* ============ Partner Strip ============ */
.partner-strip {
  background: var(--white); padding: 40px 0;
  border-bottom: 1px solid var(--border);
}
.partner-strip-label {
  font-size: 0.8125rem; color: var(--text-light); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  text-align: center; margin-bottom: 24px;
}
.partner-logos { display: flex; align-items: center; justify-content: center; gap: 40px; flex-wrap: wrap; }
.partner-badge {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 22px; border-radius: 8px;
  background: var(--bg-light); border: 1px solid var(--border);
  font-weight: 700; font-size: 1rem; color: var(--text-secondary);
  transition: var(--transition);
}
.partner-badge:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow); }
.partner-badge-icon { width: 28px; height: 28px; }
.partner-badge-certified { font-size: 0.7rem; font-weight: 500; color: var(--success); }

/* ============ Cards ============ */
.card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  transition: var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  transform: translateY(-3px);
}
.card-icon {
  position: relative;
  width: 60px; height: 60px; border-radius: 16px;
  background: linear-gradient(145deg, #2E97F0 0%, #0078D4 55%, #005A9E 100%);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 10px 22px rgba(0,90,160,0.30),
              0 2px 4px rgba(0,0,0,0.10),
              inset 0 1px 1px rgba(255,255,255,0.55);
  transition: var(--transition);
}
.card-icon::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(160deg, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0) 50%);
  pointer-events: none;
}
.card-icon svg {
  position: relative; z-index: 1;
  width: 28px; height: 28px; color: #FFFFFF !important;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.28));
}
.card:hover .card-icon { transform: translateY(-3px) scale(1.04); box-shadow: 0 16px 30px rgba(0,90,160,0.38), inset 0 1px 1px rgba(255,255,255,0.6); }
.card-icon.v-teal   { background: linear-gradient(145deg, #19CCAB 0%, #00B294 55%, #007E6B 100%); box-shadow: 0 10px 22px rgba(0,140,114,0.30), 0 2px 4px rgba(0,0,0,0.10), inset 0 1px 1px rgba(255,255,255,0.55); }
.card-icon.v-purple { background: linear-gradient(145deg, #A267E8 0%, #7B2FBE 55%, #57208C 100%); box-shadow: 0 10px 22px rgba(91,30,148,0.30), 0 2px 4px rgba(0,0,0,0.10), inset 0 1px 1px rgba(255,255,255,0.55); }
.card-icon.v-orange { background: linear-gradient(145deg, #F6A94D 0%, #E67E22 55%, #BF5E12 100%); box-shadow: 0 10px 22px rgba(191,94,18,0.30), 0 2px 4px rgba(0,0,0,0.10), inset 0 1px 1px rgba(255,255,255,0.55); }
.card-icon.v-cyan   { background: linear-gradient(145deg, #29B6D8 0%, #0091BD 55%, #006A8C 100%); box-shadow: 0 10px 22px rgba(0,106,140,0.30), 0 2px 4px rgba(0,0,0,0.10), inset 0 1px 1px rgba(255,255,255,0.55); }
.feature-icon, .cert-icon, .award-icon {
  filter: drop-shadow(0 6px 10px rgba(20,30,60,0.22));
  transition: var(--transition);
}
.feature-item:hover .feature-icon,
.cert-card:hover .cert-icon,
.award-banner:hover .award-icon { transform: translateY(-3px) scale(1.06); }
.adv-card-num {
  background: linear-gradient(160deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  filter: drop-shadow(0 3px 5px rgba(0,90,160,0.25));
}
.card h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--text-primary); }
.card p { font-size: 0.9375rem; }
.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 18px; font-size: 0.9rem; font-weight: 600; color: var(--primary);
  transition: var(--transition);
}
.card-link svg { width: 15px; height: 15px; transition: transform 0.2s; }
.card-link:hover svg { transform: translateX(4px); }

/* Product card */
.product-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow);
  transition: var(--transition); border: 1px solid var(--border);
}
.product-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); border-color: transparent; }
.product-card-header {
  padding: 36px 32px 28px;
  display: flex; align-items: center; gap: 18px;
}
.product-card-header.blue { background: linear-gradient(135deg, #0052A0 0%, #0078D4 100%); }
.product-card-header.teal { background: linear-gradient(135deg, #006055 0%, #00B294 100%); }
.product-logo-wrap {
  width: 64px; height: 64px; border-radius: 14px;
  background: #FFFFFF; padding: 12px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.18);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.product-logo-wrap img { width: 100%; height: 100%; object-fit: contain; }
.product-card-name { font-size: 1.4rem; font-weight: 800; color: var(--white); }
.product-card-tagline { font-size: 0.875rem; color: rgba(255,255,255,0.8); margin-top: 3px; }
.product-card-body { padding: 28px 32px 32px; }
.product-card-desc { font-size: 0.9375rem; color: var(--text-secondary); margin-bottom: 22px; }
.product-features li {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 9px 0; border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem; color: var(--text-secondary);
}
.product-features li:last-child { border-bottom: none; }
.product-features li::before {
  content: '✓'; color: var(--secondary); font-weight: 800;
  flex-shrink: 0; font-size: 0.85rem; margin-top: 2px;
}
.product-card-foot {
  padding: 16px 32px 24px;
  display: flex; gap: 12px; border-top: 1px solid var(--border-light);
}

/* ============ Stats Strip ============ */
.stats-strip { background: var(--primary); padding: 56px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; }
.stat-num { font-size: 2.75rem; font-weight: 800; color: var(--white); line-height: 1; }
.stat-num sup { font-size: 1.5rem; vertical-align: super; }
.stat-num sub { font-size: 1.4rem; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.75); margin-top: 8px; }

/* ============ Feature list ============ */
.feature-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.feature-item {
  padding: 28px 24px; border-radius: var(--radius-lg);
  background: var(--bg-section); transition: var(--transition);
  border: 1px solid transparent;
}
.feature-item:hover { background: var(--primary-light); border-color: var(--primary-mid); }
.feature-icon { font-size: 2.25rem; margin-bottom: 14px; line-height: 1; }
.feature-item h4 { color: var(--text-primary); margin-bottom: 8px; }
.feature-item p { font-size: 0.9rem; }

/* ============ Page hero (inner pages) ============ */
.page-hero {
  padding: calc(var(--nav-height) + 64px) 0 72px;
  background: linear-gradient(155deg, var(--navy-dark) 0%, var(--navy) 40%, var(--primary) 100%);
  color: var(--white); position: relative; overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute; top: -80px; right: -100px;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,178,148,0.12), transparent 70%);
  pointer-events: none;
}
.page-hero .eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(255,255,255,0.65); margin-bottom: 14px;
}
.page-hero h1 { color: var(--white); margin-bottom: 18px; }
.page-hero .lead { font-size: 1.1rem; color: rgba(255,255,255,0.78); max-width: 620px; line-height: 1.8; }
.page-hero-actions { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }

/* ============ Challenge section ============ */
.challenge-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.challenge-item {
  border-left: 4px solid var(--primary);
  padding: 22px 26px; border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--bg-section);
}
.challenge-item h4 { font-size: 1rem; color: var(--text-primary); margin-bottom: 7px; }
.challenge-item p { font-size: 0.9rem; }

/* ============ Advantage cards ============ */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 30px 28px;
  position: relative; overflow: hidden; transition: var(--transition);
}
.adv-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.adv-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); border-color: transparent; }
.adv-card-num {
  font-size: 3.5rem; font-weight: 900; color: var(--primary-mid);
  line-height: 1; margin-bottom: 14px; letter-spacing: -0.05em;
}
.adv-card h4 { font-size: 1.05rem; color: var(--text-primary); margin-bottom: 10px; }
.adv-card p { font-size: 0.9rem; }
.adv-card ul { margin-top: 10px; }
.adv-card ul li {
  font-size: 0.875rem; color: var(--text-secondary);
  display: flex; align-items: flex-start; gap: 8px;
  padding: 4px 0;
}
.adv-card ul li::before { content: '·'; color: var(--primary); font-weight: 900; flex-shrink: 0; font-size: 1.1rem; line-height: 1.4; }

/* ============ Timeline ============ */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ''; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: var(--primary-mid); }
.timeline-item { position: relative; padding: 0 0 36px 24px; }
.timeline-item::before {
  content: ''; position: absolute; left: -20px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--primary); border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--primary);
}
.timeline-item h4 { margin-bottom: 8px; color: var(--text-primary); }
.timeline-item p { font-size: 0.9rem; }

/* ============ Certifications ============ */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.cert-card {
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px 20px; text-align: center; transition: var(--transition); background: var(--white);
}
.cert-card:hover { box-shadow: var(--shadow); border-color: var(--primary-mid); transform: translateY(-2px); }
.cert-icon { font-size: 3rem; margin-bottom: 16px; }
.cert-badge { width: 64px; height: 64px; margin: 0 auto 16px; }
.cert-badge img { width: 100%; height: 100%; object-fit: contain; }
.cert-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.cert-body { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.cert-tag {
  display: inline-block; margin-top: 12px;
  font-size: 0.75rem; font-weight: 600; color: var(--success);
  background: #DFF0D8; border-radius: 100px; padding: 3px 10px;
}

/* ============ Contact ============ */
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; align-items: start; }
.contact-info-item { display: flex; gap: 16px; margin-bottom: 28px; align-items: flex-start; }
.contact-icon-wrap {
  position: relative;
  width: 50px; height: 50px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(145deg, #2E97F0 0%, #0078D4 55%, #005A9E 100%);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 18px rgba(0,90,160,0.28), inset 0 1px 1px rgba(255,255,255,0.5);
}
.contact-icon-wrap::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(160deg, rgba(255,255,255,0.5) 0%, rgba(255,255,255,0) 50%);
  pointer-events: none;
}
.contact-icon-wrap svg { position: relative; z-index: 1; width: 22px; height: 22px; color: #FFFFFF !important; filter: drop-shadow(0 2px 3px rgba(0,0,0,0.26)); }
.contact-info-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-light); margin-bottom: 3px; }
.contact-info-value { font-size: 1rem; color: var(--text-primary); font-weight: 500; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--text-primary); margin-bottom: 7px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 11px 15px; border: 1.5px solid var(--border);
  border-radius: var(--radius); font-size: 0.9375rem; color: var(--text-primary);
  background: var(--white); transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light);
}
.form-group textarea { resize: vertical; min-height: 130px; line-height: 1.6; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============ News ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition);
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: transparent; }
.news-card-img {
  width: 100%; height: 210px; object-fit: cover;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-mid));
  display: flex; align-items: center; justify-content: center; font-size: 4rem;
}
.news-card-body { padding: 26px; }
.news-tag {
  display: inline-block; font-size: 0.73rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 3px 10px; border-radius: 100px;
  background: var(--primary-light); color: var(--primary); margin-bottom: 10px;
}
.news-card-title { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; line-height: 1.45; }
.news-card-excerpt { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.7; }
.news-card-date { font-size: 0.8rem; color: var(--text-light); margin-top: 14px; }

/* ============ Footer ============ */
.footer { background: #0F1E38; color: rgba(255,255,255,0.65); padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.8fr; gap: 40px; padding-bottom: 56px; }
.footer-logo { height: 40px; width: auto; max-width: 100%; object-fit: contain; margin-bottom: 18px; filter: brightness(0) invert(1); opacity: 0.92; }
.footer-desc { font-size: 0.875rem; line-height: 1.8; color: rgba(255,255,255,0.55); max-width: 250px; margin-bottom: 24px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 8px;
  background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center;
  transition: var(--transition); color: rgba(255,255,255,0.7); font-size: 1.1rem;
}
.footer-social a:hover { background: var(--primary); color: var(--white); }
.footer-col h5 { font-size: 0.875rem; font-weight: 700; color: var(--white); margin-bottom: 18px; text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col ul li { margin-bottom: 11px; }
.footer-col ul li a { font-size: 0.875rem; color: rgba(255,255,255,0.55); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--white); }
.footer-contact-item { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; }
.footer-contact-item svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.footer-contact-item span { font-size: 0.85rem; color: rgba(255,255,255,0.6); line-height: 1.6; white-space: nowrap; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 0.8125rem; color: rgba(255,255,255,0.38);
}
.footer-bottom a { color: rgba(255,255,255,0.38); transition: var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }
.footer-bottom-links { display: flex; gap: 20px; }

/* ============ Misc ============ */
.bg-light { background: var(--bg-light); }
.bg-section { background: var(--bg-section); }
.bg-primary { background: var(--primary); }
.bg-navy { background: var(--navy); }
.text-primary-color { color: var(--primary); }
.divider { height: 1px; background: var(--border); margin: 0; }
.tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.8rem; font-weight: 600; padding: 4px 12px;
  border-radius: 100px; background: var(--primary-light); color: var(--primary);
}
.tag-secondary { background: rgba(0,178,148,0.1); color: var(--secondary-dark); }
.tag-purple { background: rgba(123,47,190,0.1); color: var(--accent); }
.award-banner {
  background: linear-gradient(135deg, rgba(0,120,212,0.08), rgba(0,178,148,0.08));
  border: 1px solid var(--primary-mid); border-radius: var(--radius-lg);
  padding: 28px 32px; display: flex; align-items: center; gap: 24px;
}
.award-icon { font-size: 2.5rem; flex-shrink: 0; }
.award-title { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); }
.award-desc { font-size: 0.9rem; color: var(--text-secondary); margin-top: 4px; }

/* ============ Video Showcase ============ */
.video-showcase {
  background: linear-gradient(180deg, #0A1426 0%, #0F2140 55%, #0B1A33 100%);
  position: relative; overflow: hidden;
}
.video-showcase::before {
  content: ''; position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: 760px; height: 420px;
  background: radial-gradient(ellipse, rgba(0,178,148,0.16), transparent 70%);
  pointer-events: none;
}
.video-showcase .section-header { position: relative; z-index: 1; }
.video-showcase .section-header h2 { color: var(--white); }
.video-showcase .section-header p { color: rgba(255,255,255,0.66); }
.video-showcase .section-header .eyebrow {
  background: rgba(255,255,255,0.1); color: #6FD8FF;
}
.video-frame {
  position: relative; max-width: 940px; margin: 0 auto;
  border-radius: var(--radius-xl); overflow: hidden;
  background: linear-gradient(135deg, #0D1B2A, #0052A0);
  box-shadow: 0 30px 80px rgba(0,0,0,0.55);
}
.video-frame::after {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius-xl);
  padding: 1.5px; pointer-events: none;
  background: linear-gradient(135deg, rgba(0,224,184,0.7), rgba(0,120,212,0.6), rgba(139,124,255,0.7));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.company-video {
  display: block; width: 100%; aspect-ratio: 16 / 9;
  object-fit: cover; background: #000; border-radius: var(--radius-xl);
}

/* ============ Product Screenshots ============ */
.shots-hero { max-width: 980px; margin: 0 auto 44px; }
.shots-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px; }
.shots-grid-3 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px; max-width: 980px; margin: 0 auto; }
.shot-frame {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: #0D1B2A; border: 1px solid var(--border);
  box-shadow: 0 22px 50px rgba(13,27,42,0.26);
  transition: var(--transition);
}
.shot-frame::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  padding: 1.5px; pointer-events: none;
  background: linear-gradient(135deg, rgba(0,224,184,0.6), rgba(0,120,212,0.5), rgba(139,124,255,0.6));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.shot-frame img { display: block; width: 100%; height: auto; }
figure:hover .shot-frame { transform: translateY(-4px); box-shadow: 0 30px 64px rgba(13,27,42,0.34); }
.shot-cap {
  text-align: center; font-size: 0.92rem; color: var(--text-secondary);
  margin-top: 14px; font-weight: 600;
}
@media (max-width: 768px) {
  .shots-grid, .shots-grid-3 { grid-template-columns: 1fr; gap: 26px; }
}

/* ============ Fade-in animation ============ */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.65s ease, transform 0.65s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }

/* ============ Responsive ============ */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  .section { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .challenge-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .partner-logos { gap: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer-grid > :last-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .nav-logo img { max-width: 200px; height: 34px; }
  .cert-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}