/* ══════════════════════════════════════════════════════
   HeYeGroup — Main Stylesheet
   ══════════════════════════════════════════════════════ */

:root {
  --primary: #0068B5;
  --primary-dark: #004F8C;
  --primary-light: #E8F4FD;
  --accent: #00AEEF;
  --accent2: #F7931E;
  --green: #28A745;
  --text: #1A1A2E;
  --text-secondary: #555770;
  --text-light: #8899AA;
  --bg: #FFFFFF;
  --bg-alt: #F7F9FC;
  --bg-dark: #0A1628;
  --border: #E2E8F0;
  --radius: 12px;
  --radius-sm: 8px;
  --nav-height: 72px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --card-shadow: 0 4px 24px rgba(0,104,181,0.08);
  --card-shadow-hover: 0 12px 40px rgba(0,104,181,0.18);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.6; overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }

.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; }

.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--primary); background: var(--primary-light);
  padding: 6px 14px; border-radius: 20px; margin-bottom: 16px;
}
.section-tag::before {
  content: ''; width: 6px; height: 6px; background: var(--primary); border-radius: 50%;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 800;
  line-height: 1.2; color: var(--text); margin-bottom: 16px;
}
.section-subtitle {
  font-size: 1rem; color: var(--text-secondary); max-width: 600px; line-height: 1.8;
}
.text-center { text-align: center; }
.text-center .section-subtitle { margin: 0 auto; }

/* ── Animations ── */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ══════════════════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════════════════ */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height); z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}
.nav-inner { display: flex; align-items: center; height: var(--nav-height); gap: 32px; }
.nav-logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-logo img { width: 42px; height: 42px; object-fit: contain; border-radius: 8px; }
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.nav-logo-text .name-en { font-size: 0.95rem; font-weight: 800; color: #fff; letter-spacing: 0.02em; }
.nav-logo-text .name-zh { font-size: 0.6rem; color: rgba(255,255,255,0.7); letter-spacing: 0.08em; }
#navbar.scrolled .nav-logo-text .name-en { color: var(--text); }
#navbar.scrolled .nav-logo-text .name-zh { color: var(--text-secondary); }
#nav-menu { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-link {
  padding: 7px 11px; font-size: 0.85rem; font-weight: 500;
  color: rgba(255,255,255,0.88); border-radius: var(--radius-sm);
  transition: all var(--transition); white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: #fff; background: rgba(255,255,255,0.15); }
#navbar.scrolled .nav-link { color: var(--text-secondary); }
#navbar.scrolled .nav-link:hover, #navbar.scrolled .nav-link.active {
  color: var(--primary); background: var(--primary-light);
}
.lang-toggle {
  padding: 6px 14px; font-size: 0.82rem; font-weight: 700;
  border: 1.5px solid rgba(255,255,255,0.5); background: transparent;
  color: #fff; border-radius: 20px; transition: all var(--transition);
  letter-spacing: 0.05em; margin-left: 6px;
}
.lang-toggle:hover { background: rgba(255,255,255,0.2); border-color: #fff; }
#navbar.scrolled .lang-toggle { border-color: var(--primary); color: var(--primary); }
#navbar.scrolled .lang-toggle:hover { background: var(--primary); color: #fff; }
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; background: transparent; margin-left: auto;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: #fff; border-radius: 2px; transition: all var(--transition);
}
#navbar.scrolled .menu-toggle span { background: var(--text); }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════ */
#home {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; overflow: hidden;
  background: linear-gradient(135deg, #0A1628 0%, #0D2447 35%, #0068B5 75%, #00AEEF 100%);
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-bg-shapes::before {
  content: ''; position: absolute; top: -20%; right: -10%;
  width: 60vw; height: 60vw;
  background: radial-gradient(circle, rgba(0,174,239,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-bg-shapes::after {
  content: ''; position: absolute; bottom: -10%; left: -5%;
  width: 40vw; height: 40vw;
  background: radial-gradient(circle, rgba(247,147,30,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-grid-lines {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content {
  position: relative; z-index: 2;
  padding: calc(var(--nav-height) + 60px) 0 80px; width: 100%;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent);
  border: 1.5px solid rgba(0,174,239,0.4); padding: 5px 14px;
  border-radius: 20px; background: rgba(0,174,239,0.08); margin-bottom: 24px;
}
.hero-badge::before {
  content: ''; width: 6px; height: 6px; background: var(--accent);
  border-radius: 50%; animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); } 50% { opacity:0.5; transform:scale(1.4); }
}
.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem); font-weight: 900;
  line-height: 1.12; color: #fff; margin-bottom: 24px; letter-spacing: -0.02em;
}
.hero-title span { color: var(--accent); }
.hero-subtitle {
  font-size: 1rem; color: rgba(255,255,255,0.75); line-height: 1.8;
  margin-bottom: 40px; max-width: 520px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 30px; font-size: 0.95rem; font-weight: 700; color: #fff;
  background: var(--primary); border-radius: var(--radius-sm);
  transition: all var(--transition); box-shadow: 0 4px 16px rgba(0,104,181,0.4);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,104,181,0.5); }
.btn-outline {
  padding: 13px 30px; font-size: 0.95rem; font-weight: 700; color: #fff;
  border: 2px solid rgba(255,255,255,0.5); border-radius: var(--radius-sm);
  transition: all var(--transition); background: transparent;
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; }
.hero-stat {
  text-align: center; padding: 18px 12px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); backdrop-filter: blur(10px);
}
.hero-stat-num { font-size: 1.8rem; font-weight: 900; color: var(--accent); line-height: 1; margin-bottom: 5px; }
.hero-stat-label { font-size: 0.75rem; color: rgba(255,255,255,0.6); }

/* Dashboard */
.hero-dashboard {
  background: rgba(10,22,40,0.7); border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px; padding: 24px; backdrop-filter: blur(20px);
}
.dashboard-header { display: flex; align-items: center; gap: 8px; margin-bottom: 20px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #FF5F57; } .dot.yellow { background: #FFBD2E; } .dot.green { background: #28CA41; }
.dashboard-title { margin-left: 8px; font-size: 0.78rem; color: rgba(255,255,255,0.5); font-weight: 600; }
.dashboard-metrics { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; margin-bottom: 18px; }
.d-metric { background: rgba(255,255,255,0.06); border-radius: 10px; padding: 14px; }
.d-metric-label { font-size: 0.68rem; color: rgba(255,255,255,0.45); margin-bottom: 5px; }
.d-metric-value { font-size: 1.3rem; font-weight: 800; color: #fff; }
.d-metric-change { font-size: 0.68rem; color: #28CA41; margin-top: 3px; }
.d-metric-change.down { color: #FF5F57; }
.dashboard-chart { height: 72px; display: flex; align-items: flex-end; gap: 5px; }
.chart-bar {
  flex: 1; border-radius: 4px 4px 0 0;
  background: linear-gradient(to top, var(--primary), var(--accent));
  opacity: 0.75; animation: barGrow 1.2s ease forwards; transform-origin: bottom;
}
@keyframes barGrow { from { transform:scaleY(0); } to { transform:scaleY(1); } }
.platform-pills { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.platform-pill { padding: 3px 10px; font-size: 0.7rem; font-weight: 600; border-radius: 10px; color: rgba(255,255,255,0.9); }
.pill-taobao { background: rgba(255,102,0,0.3); border: 1px solid rgba(255,102,0,0.5); }
.pill-pdd { background: rgba(200,20,50,0.3); border: 1px solid rgba(200,20,50,0.5); }
.pill-douyin { background: rgba(30,30,30,0.6); border: 1px solid rgba(255,255,255,0.2); }
.pill-wechat { background: rgba(9,187,7,0.25); border: 1px solid rgba(9,187,7,0.4); }

/* ══════════════════════════════════════════════════════
   COMMON SECTION SPACING
   ══════════════════════════════════════════════════════ */
section { padding: 96px 0; }

/* ══════════════════════════════════════════════════════
   SERVICES
   ══════════════════════════════════════════════════════ */
#services { background: var(--bg); }
.services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 56px; }
.service-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 28px; transition: all var(--transition); position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--card-shadow-hover); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 52px; height: 52px; border-radius: var(--radius-sm);
  background: var(--primary-light); display: flex; align-items: center;
  justify-content: center; margin-bottom: 20px; font-size: 1.4rem; transition: all var(--transition);
}
.service-card:hover .service-icon { background: var(--primary); transform: scale(1.1); }
.service-icon svg path, .service-icon svg rect, .service-icon svg circle,
.service-icon svg polyline, .service-icon svg line { transition: stroke var(--transition); }
.service-card:hover .service-icon svg path,
.service-card:hover .service-icon svg rect,
.service-card:hover .service-icon svg circle,
.service-card:hover .service-icon svg polyline,
.service-card:hover .service-icon svg line { stroke: #fff; }
.service-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.service-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.75; }

/* ══════════════════════════════════════════════════════
   PLATFORMS
   ══════════════════════════════════════════════════════ */
#platforms { background: var(--bg-alt); }
.platforms-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 18px; margin-top: 56px; }
.platform-card {
  background: var(--bg); border-radius: var(--radius); padding: 26px 16px;
  text-align: center; border: 1.5px solid var(--border); transition: all var(--transition);
}
.platform-card:hover { transform: translateY(-5px); box-shadow: var(--card-shadow-hover); border-color: var(--primary); }
.platform-logo {
  width: 60px; height: 60px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; font-size: 1.6rem; font-weight: 900;
}
.logo-taobao { background: linear-gradient(135deg, #FF6600, #FF9900); color: #fff; }
.logo-pdd { background: linear-gradient(135deg, #C8143C, #E5002B); color: #fff; }
.logo-douyin { background: #010101; color: #fff; border: 2px solid #69C9D0; }
.logo-wechat { background: linear-gradient(135deg, #09BB07, #1AAD19); color: #fff; }
.logo-jd { background: linear-gradient(135deg, #CC0000, #E21F1F); color: #fff; }
.platform-card h3 { font-size: 0.9rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.platform-card p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 10px; }
.platform-users {
  font-size: 0.75rem; font-weight: 700; color: var(--primary);
  background: var(--primary-light); padding: 3px 10px; border-radius: 12px;
  display: inline-block; margin-bottom: 10px;
}
.platform-badge { display: inline-block; padding: 3px 10px; font-size: 0.7rem; font-weight: 700; border-radius: 10px; }
.badge-active { background: #D4EDDA; color: #155724; }
.badge-plan { background: #FFF3CD; color: #856404; }

/* ══════════════════════════════════════════════════════
   CASES
   ══════════════════════════════════════════════════════ */
#cases { background: var(--bg); }
.cases-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; margin-top: 56px; }
.case-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: all var(--transition);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--card-shadow-hover); border-color: transparent; }
.case-card-header {
  padding: 24px 28px 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative; overflow: hidden;
}
.case-card-header::after {
  content: ''; position: absolute; top: -30%; right: -10%;
  width: 120px; height: 120px;
  background: rgba(255,255,255,0.07); border-radius: 50%;
}
.case-platform-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  background: rgba(255,255,255,0.2); color: #fff;
  padding: 3px 10px; border-radius: 10px; margin-bottom: 10px;
}
.case-brand { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.case-result { font-size: 1.3rem; font-weight: 900; color: var(--accent); }
.case-card-body { padding: 24px 28px; }
.case-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 20px; }
.case-metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.case-metric { text-align: center; padding: 12px 8px; background: var(--bg-alt); border-radius: var(--radius-sm); }
.case-metric-val { font-size: 1.1rem; font-weight: 800; color: var(--primary); }
.case-metric-label { font-size: 0.68rem; color: var(--text-secondary); margin-top: 2px; }
.cases-footer { text-align: center; margin-top: 40px; }
.btn-secondary {
  display: inline-block; padding: 12px 32px; font-size: 0.9rem; font-weight: 700;
  color: var(--primary); border: 2px solid var(--primary); border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.btn-secondary:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ══════════════════════════════════════════════════════
   DATA
   ══════════════════════════════════════════════════════ */
#data {
  background: linear-gradient(135deg, #0A1628 0%, #0D2447 60%, #0068B5 100%);
  position: relative; overflow: hidden;
}
#data::before {
  content: ''; position: absolute; top: -30%; right: -10%;
  width: 60vw; height: 60vw;
  background: radial-gradient(circle, rgba(0,174,239,0.12) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
#data .section-tag { background: rgba(0,174,239,0.15); color: var(--accent); }
#data .section-tag::before { background: var(--accent); }
#data .section-title { color: #fff; }
#data .section-subtitle { color: rgba(255,255,255,0.65); }
.data-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; margin-top: 56px; }
.data-features { display: flex; flex-direction: column; gap: 20px; }
.data-feature {
  display: flex; gap: 18px; align-items: flex-start; padding: 22px;
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); transition: all var(--transition);
}
.data-feature:hover { background: rgba(255,255,255,0.09); border-color: rgba(0,174,239,0.3); transform: translateX(6px); }
.data-feature-icon {
  width: 42px; height: 42px; border-radius: 10px; background: rgba(0,174,239,0.15);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 1.1rem;
}
.data-feature-text h4 { font-size: 0.93rem; font-weight: 700; color: #fff; margin-bottom: 5px; }
.data-feature-text p { font-size: 0.83rem; color: rgba(255,255,255,0.58); line-height: 1.65; }
.data-visual { display: flex; flex-direction: column; gap: 18px; }
.data-metrics-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.data-metric {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); padding: 18px; text-align: center;
}
.data-metric-val { font-size: 1.8rem; font-weight: 900; color: var(--accent); line-height: 1; }
.data-metric-label { font-size: 0.72rem; color: rgba(255,255,255,0.5); margin-top: 6px; }
.data-chart-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); padding: 22px;
}
.data-chart-title { font-size: 0.8rem; color: rgba(255,255,255,0.55); margin-bottom: 14px; font-weight: 600; }
.data-chart-wrap { display: flex; gap: 10px; align-items: flex-end; }
.data-chart-bars { display: flex; align-items: flex-end; gap: 8px; height: 96px; flex: 1; }
.data-bar-group { flex: 1; display: flex; gap: 2px; align-items: flex-end; height: 100%; }
.data-bar { flex: 1; border-radius: 3px 3px 0 0; }
.data-bar.sales { background: var(--primary); }
.data-bar.profit { background: var(--accent); }
.chart-labels { display: flex; gap: 8px; margin-top: 6px; }
.chart-labels span { flex: 1; font-size: 0.6rem; color: rgba(255,255,255,0.35); text-align: center; }
.data-chart-legend { display: flex; gap: 14px; margin-top: 10px; }
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 0.73rem; color: rgba(255,255,255,0.55); }
.legend-dot { width: 8px; height: 8px; border-radius: 2px; }
.legend-dot.sales { background: var(--primary); }
.legend-dot.profit { background: var(--accent); }

/* ══════════════════════════════════════════════════════
   CULTURE
   ══════════════════════════════════════════════════════ */
#culture { background: var(--bg-alt); }
.culture-values { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 56px; }
.culture-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px; transition: all var(--transition); position: relative;
}
.culture-card:hover { transform: translateY(-5px); box-shadow: var(--card-shadow-hover); border-color: var(--primary); }
.culture-icon {
  font-size: 2.2rem; margin-bottom: 16px; display: block;
  filter: drop-shadow(0 2px 8px rgba(0,104,181,0.2));
}
.culture-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.culture-card p { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.75; }
.culture-life { margin-top: 72px; }
.culture-life-title {
  font-size: 1.6rem; font-weight: 800; text-align: center;
  margin-bottom: 36px; color: var(--text);
}
.culture-life-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.life-card {
  background: var(--bg); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: all var(--transition);
}
.life-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow); }
.life-card-img {
  height: 140px; display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
}
.life-bg-1 { background: linear-gradient(135deg, #E8F4FD, #BFE0F5); }
.life-bg-2 { background: linear-gradient(135deg, #FFF3E0, #FFE0B2); }
.life-bg-3 { background: linear-gradient(135deg, #E8F5E9, #C8E6C9); }
.life-bg-4 { background: linear-gradient(135deg, #F3E5F5, #E1BEE7); }
.life-card-body { padding: 18px 20px; }
.life-card-body h4 { font-size: 0.93rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.life-card-body p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.65; }

/* ══════════════════════════════════════════════════════
   TIMELINE
   ══════════════════════════════════════════════════════ */
#timeline { background: var(--bg); }
.timeline-track { position: relative; margin-top: 56px; padding: 20px 0; }
.timeline-track::before {
  content: ''; position: absolute; top: 0; bottom: 0;
  left: 50%; transform: translateX(-50%);
  width: 2px; background: linear-gradient(to bottom, var(--primary-light), var(--primary), var(--primary-light));
}
.timeline-item {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 0 32px;
  align-items: start; margin-bottom: 48px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-content-left { text-align: right; padding-top: 8px; }
.timeline-content-right { padding-top: 8px; }
.timeline-empty { visibility: hidden; }
.timeline-item:nth-child(even) .timeline-content-left { visibility: hidden; }
.timeline-item:nth-child(even) .timeline-content-right { grid-column: 3; }
.timeline-item:nth-child(odd) .timeline-content-right { visibility: hidden; }
.timeline-node {
  display: flex; flex-direction: column; align-items: center; gap: 8px; flex-shrink: 0;
}
.timeline-dot {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 0.8rem; font-weight: 800;
  box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--primary-light);
  z-index: 1;
}
.timeline-year {
  font-size: 0.78rem; font-weight: 700; color: var(--primary);
  background: var(--primary-light); padding: 2px 8px; border-radius: 10px;
}
.timeline-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 26px; transition: all var(--transition);
}
.timeline-card:hover { box-shadow: var(--card-shadow-hover); border-color: var(--primary); transform: scale(1.02); }
.timeline-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.timeline-card p { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.7; }

/* ══════════════════════════════════════════════════════
   TEAM
   ══════════════════════════════════════════════════════ */
#team { background: var(--bg-alt); }
.team-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 56px; }
.team-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: all var(--transition);
}
.team-card:hover { transform: translateY(-6px); box-shadow: var(--card-shadow-hover); }
.team-card-top {
  padding: 32px 24px 24px;
  background: linear-gradient(135deg, var(--bg-alt) 0%, #EDF5FF 100%);
  text-align: center; position: relative;
}
.team-avatar {
  width: 88px; height: 88px; border-radius: 50%; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; font-weight: 900; color: #fff;
  box-shadow: 0 6px 20px rgba(0,104,181,0.25);
}
.av-1 { background: linear-gradient(135deg, #0068B5, #00AEEF); }
.av-2 { background: linear-gradient(135deg, #7B2FBE, #B868F4); }
.av-3 { background: linear-gradient(135deg, #0A8754, #21D07A); }
.av-4 { background: linear-gradient(135deg, #C8143C, #FF6B6B); }
.av-5 { background: linear-gradient(135deg, #F7931E, #FFD54F); }
.av-6 { background: linear-gradient(135deg, #0D2447, #0068B5); }
.team-name { font-size: 1.05rem; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.team-role { font-size: 0.82rem; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.team-exp {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  background: var(--primary-light); color: var(--primary);
  padding: 2px 10px; border-radius: 10px;
}
.team-card-body { padding: 20px 24px; }
.team-card-body p { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.75; }

/* ══════════════════════════════════════════════════════
   WHY US
   ══════════════════════════════════════════════════════ */
#why { background: var(--bg); }
.why-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; margin-top: 56px; }
.why-card {
  padding: 32px 24px; border-radius: var(--radius);
  background: var(--bg-alt); border: 1px solid var(--border); transition: all var(--transition);
}
.why-card:hover { box-shadow: var(--card-shadow-hover); background: var(--bg); transform: translateY(-4px); }
.why-number {
  font-size: 2.8rem; font-weight: 900; color: var(--primary-light);
  line-height: 1; margin-bottom: 14px; transition: color var(--transition);
}
.why-card:hover .why-number { color: var(--primary); }
.why-card h3 { font-size: 0.98rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.why-card p { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.75; }

/* ══════════════════════════════════════════════════════
   TESTIMONIALS
   ══════════════════════════════════════════════════════ */
#testimonials { background: var(--bg-alt); }
.testimonials-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; margin-top: 56px; }
.testimonial-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; transition: all var(--transition); position: relative;
}
.testimonial-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-4px); }
.quote-mark {
  font-size: 4rem; line-height: 1; color: var(--primary-light); font-family: Georgia, serif;
  position: absolute; top: 16px; left: 24px;
}
.testimonial-content {
  font-size: 0.93rem; color: var(--text-secondary); line-height: 1.8;
  margin-bottom: 24px; padding-top: 20px; font-style: italic;
}
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.testimonial-avatar {
  width: 46px; height: 46px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem; font-weight: 700; flex-shrink: 0;
}
.testimonial-name { font-size: 0.92rem; font-weight: 700; color: var(--text); }
.testimonial-company { font-size: 0.78rem; color: var(--text-light); margin-top: 2px; }
.stars { color: #F7931E; font-size: 0.85rem; margin-top: 4px; }

/* ══════════════════════════════════════════════════════
   NEWS
   ══════════════════════════════════════════════════════ */
#news { background: var(--bg); }
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; margin-top: 56px; }
.news-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: all var(--transition);
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--card-shadow-hover); }
.news-card-img {
  height: 160px; display: flex; align-items: center; justify-content: center; font-size: 3.5rem;
}
.news-img-1 { background: linear-gradient(135deg, #E8F4FD 0%, #C5E3F7 100%); }
.news-img-2 { background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%); }
.news-img-3 { background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 100%); }
.news-card-body { padding: 22px 24px; }
.news-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.news-date { font-size: 0.75rem; color: var(--text-light); }
.news-tag-badge {
  font-size: 0.68rem; font-weight: 700; padding: 2px 8px;
  background: var(--primary-light); color: var(--primary); border-radius: 8px;
}
.news-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--text); margin-bottom: 10px; line-height: 1.5; }
.news-card p { font-size: 0.84rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.news-read-more { font-size: 0.83rem; font-weight: 700; color: var(--primary); transition: gap var(--transition); }
.news-read-more:hover { text-decoration: underline; }

/* ══════════════════════════════════════════════════════
   ABOUT
   ══════════════════════════════════════════════════════ */
#about { background: var(--bg-alt); }
.about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-text .section-subtitle { max-width: 100%; margin-bottom: 18px; }
.about-vision {
  margin-top: 28px; padding: 22px 24px;
  background: var(--primary-light); border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.about-vision-label {
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--primary); margin-bottom: 6px;
}
.about-vision-text { font-size: 0.98rem; font-weight: 600; color: var(--text); line-height: 1.6; }
.about-stats { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; margin-top: 28px; }
.about-stat {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; text-align: center;
}
.about-stat-num { font-size: 1.6rem; font-weight: 900; color: var(--primary); line-height: 1; }
.about-stat-label { font-size: 0.75rem; color: var(--text-secondary); margin-top: 4px; }
.about-visual { position: relative; }
.about-logo-showcase {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 20px; padding: 48px 36px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 380px; box-shadow: 0 20px 60px rgba(0,104,181,0.3);
}
.about-logo-img {
  width: 110px; height: 110px; object-fit: contain;
  margin-bottom: 22px; filter: brightness(10);
}
.about-company-name { font-size: 1.7rem; font-weight: 900; color: #fff; letter-spacing: 0.04em; }
.about-company-zh { font-size: 0.95rem; color: rgba(255,255,255,0.7); margin-top: 5px; letter-spacing: 0.1em; }
.about-tagline {
  margin-top: 18px; font-size: 0.82rem; color: rgba(255,255,255,0.5);
  text-align: center; line-height: 1.65; max-width: 220px;
}
.about-floating-stat {
  position: absolute; background: #fff; border-radius: var(--radius);
  padding: 12px 18px; box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}
.about-floating-stat.top-right { top: -16px; right: -20px; }
.about-floating-stat.bottom-left { bottom: -16px; left: -20px; }
.floating-num { font-size: 1.4rem; font-weight: 900; color: var(--primary); }
.floating-label { font-size: 0.7rem; color: var(--text-secondary); }

/* ══════════════════════════════════════════════════════
   CONTACT
   ══════════════════════════════════════════════════════ */
#contact { background: var(--bg); }
.contact-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; margin-top: 56px; align-items: start; }
.contact-info h3 { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 20px; }
.contact-item {
  display: flex; align-items: flex-start; gap: 14px; padding: 14px;
  border-radius: var(--radius-sm); transition: background var(--transition); margin-bottom: 6px;
}
.contact-item:hover { background: var(--bg-alt); }
.contact-item-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--primary-light); display: flex; align-items: center;
  justify-content: center; flex-shrink: 0; font-size: 1rem;
}
.contact-item-text strong {
  display: block; font-size: 0.76rem; font-weight: 700; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 1px;
}
.contact-item-text span { font-size: 0.9rem; color: var(--text); }
.contact-promise {
  margin-top: 20px; padding: 14px 16px; background: #FFF8E1;
  border-left: 3px solid var(--accent2); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.83rem; color: var(--text-secondary); line-height: 1.65;
}
.contact-form {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: 0.78rem; font-weight: 600;
  color: var(--text-secondary); margin-bottom: 6px;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 11px 14px; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg);
  font-size: 0.88rem; color: var(--text); font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition); outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,104,181,0.1);
}
.form-group textarea { resize: vertical; min-height: 90px; }
.btn-submit {
  width: 100%; padding: 14px; font-size: 0.95rem; font-weight: 700; color: #fff;
  background: var(--primary); border-radius: var(--radius-sm);
  transition: all var(--transition); box-shadow: 0 4px 14px rgba(0,104,181,0.3);
}
.btn-submit:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,104,181,0.4); }

/* ══════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════ */
footer { background: var(--bg-dark); color: rgba(255,255,255,0.65); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 44px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand img { width: 50px; height: 50px; object-fit: contain; border-radius: 10px; filter: brightness(10); margin-bottom: 14px; }
.footer-brand-name { font-size: 1.05rem; font-weight: 800; color: #fff; margin-bottom: 3px; }
.footer-brand-zh { font-size: 0.72rem; color: rgba(255,255,255,0.45); margin-bottom: 14px; letter-spacing: 0.06em; }
.footer-desc { font-size: 0.83rem; line-height: 1.75; color: rgba(255,255,255,0.45); max-width: 280px; }
.footer-col h4 { font-size: 0.77rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.1em; color: #fff; margin-bottom: 18px; }
.footer-col li { margin-bottom: 9px; }
.footer-col a { font-size: 0.85rem; color: rgba(255,255,255,0.45); transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }
.footer-platform-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; margin-right: 7px; vertical-align: middle; }
.dot-active { background: #28CA41; } .dot-plan { background: #FFBD2E; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0; font-size: 0.8rem; color: rgba(255,255,255,0.3);
}
.footer-bottom-links { display: flex; gap: 18px; }
.footer-bottom-links a { color: rgba(255,255,255,0.3); transition: color var(--transition); }
.footer-bottom-links a:hover { color: rgba(255,255,255,0.65); }

/* Back to top */
.back-to-top {
  position: fixed; right: 24px; bottom: 28px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; cursor: pointer; box-shadow: 0 4px 14px rgba(0,104,181,0.4);
  opacity: 0; transform: translateY(10px); pointer-events: none;
  transition: all var(--transition); z-index: 999;
}
.back-to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ══════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: repeat(2,1fr); }
  .platforms-grid { grid-template-columns: repeat(3,1fr); }
  .culture-values { grid-template-columns: repeat(2,1fr); }
  .timeline-track::before { left: 24px; }
  .timeline-item { grid-template-columns: auto 1fr; }
  .timeline-item:nth-child(even) .timeline-content-right,
  .timeline-item:nth-child(odd) .timeline-content-right { grid-column: auto; }
  .timeline-content-left { display: none; }
  .timeline-item:nth-child(even) .timeline-content-left { display: none; }
  .timeline-item:nth-child(odd) .timeline-content-right { visibility: visible; }
  .timeline-item:nth-child(even) .timeline-content-right { visibility: visible; }
  .why-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero-stats { grid-template-columns: repeat(2,1fr); }
  .cases-grid { grid-template-columns: 1fr; }
  .data-layout { grid-template-columns: 1fr; gap: 40px; }
  .team-grid { grid-template-columns: repeat(2,1fr); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .about-layout { grid-template-columns: 1fr; }
  .about-floating-stat { display: none; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .culture-life-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  section { padding: 68px 0; }
  .menu-toggle { display: flex; }
  #nav-menu {
    display: none; position: fixed; top: var(--nav-height); left: 0; right: 0;
    background: rgba(10,22,40,0.97); backdrop-filter: blur(20px);
    flex-direction: column; gap: 0; padding: 12px 0;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  #nav-menu.open { display: flex; }
  .nav-link { padding: 13px 22px; border-radius: 0; font-size: 0.95rem; }
  .lang-toggle { margin: 10px 22px 0; }
  #navbar.scrolled #nav-menu { background: rgba(255,255,255,0.97); }
  #navbar.scrolled .nav-link { color: var(--text); }
  .platforms-grid { grid-template-columns: repeat(2,1fr); }
  .culture-values { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: repeat(2,1fr); }
  .platforms-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 22px 16px; }
  .culture-life-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
}