*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	color: #1a1a2e;
	background: #fff;
	line-height: 1.7;
	-webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img, video { max-width: 100%; display: block; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ========== Header ========== */
.site-header {
	position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
	background: rgba(255,255,255,0.95);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid rgba(0,0,0,0.06);
}
.header-inner {
	display: flex; align-items: center; justify-content: space-between;
	height: 72px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { width: 40px; height: 40px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-cn { font-size: 16px; font-weight: 700; color: #1a1a2e; }
.logo-en { font-size: 11px; color: #666; letter-spacing: 1px; }

.main-nav { display: flex; gap: 32px; }
.main-nav a {
	font-size: 14px; color: #333; font-weight: 500;
	transition: color .2s;
}
.main-nav a:hover, .main-nav a.active { color: #0078d4; }

.lang-switch { display: flex; gap: 8px; align-items: center; font-size: 13px; }
.lang-switch a { margin:0 0 0 10px; padding: 4px 10px; border-radius: 4px; }
.lang-switch a.active { background: #0078d4; color: #fff; }

/* ========== Page Hero ========== */
.page-hero {
	padding: 160px 0 80px;
	background: linear-gradient(135deg, #0a1628 0%, #0f2847 50%, #143a6b 100%);
	color: #fff;
	text-align: center;
}
.page-hero .section-tag {
	display: inline-block;
	font-size: 13px;
	color: #4fc3f7;
	font-weight: 600;
	letter-spacing: 2px;
	text-transform: uppercase;
	margin-bottom: 16px;
}
.page-hero h1 {
	font-size: clamp(32px, 5vw, 52px);
	font-weight: 800;
	line-height: 1.2;
	margin-bottom: 20px;
}
.page-hero p {
	font-size: 18px;
	color: rgba(255,255,255,0.8);
	max-width: 680px;
	margin: 0 auto;
}

/* ========== Content Sections ========== */
.content-section { padding: 80px 0; }
.content-section.alt { background: #f8fafc; }

.content-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 60px;
	align-items: center;
}
.content-grid.reverse .content-text { order: 2; }

.content-text h2 {
	font-size: clamp(24px, 3vw, 34px);
	font-weight: 800;
	color: #1a1a2e;
	margin-bottom: 20px;
	line-height: 1.3;
}
.content-text h2 .accent { color: #0078d4; }
.content-text p {
	font-size: 16px;
	color: #444;
	margin-bottom: 16px;
}
.content-text ul {
	list-style: none; padding: 0; margin-top: 20px;
}
.content-text ul li {
	font-size: 15px; color: #444; padding: 6px 0 6px 24px;
	position: relative;
}
.content-text ul li::before {
	content: "▸"; position: absolute; left: 0; color: #0078d4; font-weight: 700;
}

.content-visual {
	background: linear-gradient(135deg, #0a1628, #143a6b);
	border-radius: 16px;
	padding: 48px;
	color: #fff;
	text-align: center;
	min-height: 280px;
	display: flex; flex-direction: column;
	align-items: center; justify-content: center;
}
.content-visual .visual-icon { font-size: 48px; margin-bottom: 16px; }
.content-visual h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.content-visual p { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ========== Timeline ========== */
.timeline-section { padding: 80px 0; background: #fff; }
.timeline {
	max-width: 800px; margin: 0 auto;
	position: relative;
	padding-left: 40px;
}
.timeline::before {
	content: ''; position: absolute; left: 12px; top: 0; bottom: 0;
	width: 2px; background: #e0e8f0;
}
.timeline-item {
	position: relative;
	padding-bottom: 40px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
	content: ''; position: absolute; left: -34px; top: 6px;
	width: 14px; height: 14px; border-radius: 50%;
	background: #0078d4; border: 3px solid #fff;
	box-shadow: 0 0 0 2px #0078d4;
}
.timeline-item .year {
	font-size: 13px; font-weight: 700; color: #0078d4;
	letter-spacing: 1px; margin-bottom: 4px;
}
.timeline-item h3 {
	font-size: 18px; font-weight: 700; color: #1a1a2e;
	margin-bottom: 8px;
}
.timeline-item p {
	font-size: 15px; color: #555;
}

/* ========== Values ========== */
.values-section { padding: 80px 0; background: #f8fafc; }
.values-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	gap: 32px;
}
.value-card {
	background: #fff;
	border-radius: 12px;
	padding: 36px 28px;
	text-align: center;
	box-shadow: 0 2px 12px rgba(0,0,0,0.04);
	transition: all .3s;
}
.value-card:hover {
	transform: translateY(-4px);
	box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}
.value-card .value-icon {
	width: 64px; height: 64px;
	border-radius: 16px;
	background: linear-gradient(135deg, #0078d4, #4fc3f7);
	display: flex; align-items: center; justify-content: center;
	font-size: 28px; margin: 0 auto 20px;
}
.value-card h3 {
	font-size: 18px; font-weight: 700; color: #1a1a2e;
	margin-bottom: 12px;
}
.value-card p {
	font-size: 14px; color: #555; line-height: 1.7;
}

/* ========== Team / Contact CTA ========== */
.contact-cta {
	padding: 80px 0;
	background: linear-gradient(135deg, #0078d4, #005a9e);
	color: #fff;
	text-align: center;
}
.contact-cta h2 {
	font-size: clamp(26px, 4vw, 36px);
	font-weight: 800;
	margin-bottom: 16px;
}
.contact-cta p {
	font-size: 17px;
	color: rgba(255,255,255,0.85);
	margin-bottom: 32px;
	max-width: 560px;
	margin-left: auto; margin-right: auto;
}
.contact-cta .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
	display: inline-flex; align-items: center; justify-content: center;
	padding: 14px 32px;
	font-size: 15px; font-weight: 600;
	border-radius: 6px;
	transition: all .25s;
	cursor: pointer; border: none;
}
.btn-white { background: #fff; color: #0078d4; }
.btn-white:hover { background: #e8f4fd; transform: translateY(-2px); }
.btn-outline-white { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.5); }
.btn-outline-white:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

/* ========== Footer ========== */
.site-footer {
	background: #0a1628;
	color: rgba(255,255,255,0.6);
	padding: 56px 0 32px;
	font-size: 14px;
}
.footer-grid {
	display: grid;
	grid-template-columns: 2fr 1fr 1fr 1fr;
	gap: 40px;
	margin-bottom: 40px;
}
.footer-brand .logo-cn { color: #fff; font-size: 18px; }
.footer-brand .logo-en { color: rgba(255,255,255,0.5); }
.footer-brand p {
	margin-top: 16px; font-size: 13px; color: rgba(255,255,255,0.45);
	max-width: 360px; line-height: 1.7;
}
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; padding: 4px 0; color: rgba(255,255,255,0.5); transition: color .2s; }
.footer-col a:hover { color: #4fc3f7; }
.footer-bottom {
	border-top: 1px solid rgba(255,255,255,0.08);
	padding-top: 24px;
	display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
	font-size: 12px; color: rgba(255,255,255,0.35);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
	.main-nav { display: none; }
	.content-grid { grid-template-columns: 1fr; gap: 32px; }
	.content-grid.reverse .content-text { order: 0; }
	.footer-grid { grid-template-columns: 1fr 1fr; }
	.page-hero { padding: 120px 0 60px; }
}
@media (max-width: 480px) {
	.footer-grid { grid-template-columns: 1fr; }
	.btn-group { flex-direction: column; }
	.btn { width: 100%; }
}