@charset "utf-8";

/* ========== ÆóÒµ¼ò½éÇø¿é ========== */
.intro-section {
	position: relative;
	border-radius: 16px;
	overflow: hidden;
	background: #fff;
	box-shadow: 0 8px 40px rgba(28,73,142,.08);
	transition: box-shadow .5s ease, transform .5s cubic-bezier(.22, 1, .36, 1);
}
.intro-section.in-view {
	box-shadow: 0 20px 60px rgba(28,73,142,.15), 0 0 0 1px rgba(211,38,41,.08);
}
.intro-section.in-view .intro-shimmer {
	animation: shimmerSweep 3s ease-in-out infinite;
}

.intro-corner {
	position: absolute;
	width: 60px;
	height: 60px;
	z-index: 3;
	pointer-events: none;
	opacity: 0;
	transition: opacity .6s ease;
}
.intro-section.in-view .intro-corner {
	opacity: 1;
}
.intro-corner-tl {
	top: 0;
	left: 0;
	border-top: 3px solid var(--primary);
	border-left: 3px solid var(--primary);
	border-radius: 16px 0 0 0;
	animation: cornerDrawTL .8s ease forwards .3s;
}
.intro-corner-br {
	bottom: 0;
	right: 0;
	border-bottom: 3px solid var(--secondary);
	border-right: 3px solid var(--secondary);
	border-radius: 0 0 16px 0;
	animation: cornerDrawBR .8s ease forwards .5s;
}
@keyframes cornerDrawTL {
	from { width: 0; height: 0; opacity: 0; }
	to { width: 60px; height: 60px; opacity: 1; }
}
@keyframes cornerDrawBR {
	from { width: 0; height: 0; opacity: 0; }
	to { width: 60px; height: 60px; opacity: 1; }
}

.intro-shimmer {
	position: absolute;
	top: 0;
	left: -100%;
	width: 60%;
	height: 100%;
	background: linear-gradient(90deg, transparent, rgba(255,255,255,.4), transparent);
	z-index: 2;
	pointer-events: none;
}
@keyframes shimmerSweep {
	0% { left: -100%; }
	100% { left: 200%; }
}

.intro-section-bg {
	position: absolute;
	inset: -20px 0 0;
	background: url('/static/index/img/99.png') no-repeat center bottom;
	background-size: cover;
	z-index: 0;
	transition: transform .1s linear;
	will-change: transform;
}
.intro-section-bg::before {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(
		to bottom,
		rgba(255,255,255,.97) 0%,
		rgba(255,255,255,.92) 35%,
		rgba(255,255,255,.75) 55%,
		rgba(255,255,255,.35) 75%,
		rgba(255,255,255,.1) 100%
	);
}
.intro-section-inner {
	position: relative;
	z-index: 1;
	padding: 56px 56px 480px;
}

.intro-head {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	margin-bottom: 40px;
	gap: 20px;
}
.intro-title-en {
	font-size: 52px;
	font-weight: 800;
	line-height: 1.1;
	margin: 0;
	font-family: Arial, Helvetica, sans-serif;
}
.intro-title-en .title-line {
	display: block;
	color: transparent;
	-webkit-text-stroke: 1.5px rgba(28,73,142,.35);
	text-stroke: 1.5px rgba(28,73,142,.35);
	opacity: 0;
	transform: translateX(-30px);
	animation: titleLineIn 1s cubic-bezier(.22, 1, .36, 1) forwards;
}
.intro-title-en .title-line:nth-child(2) {
	animation-delay: .15s;
}
.intro-section.in-view .intro-title-en .title-line {
	animation: titleStrokeFill 2s ease forwards .5s, titleLineIn 1s cubic-bezier(.22, 1, .36, 1) forwards;
}
@keyframes titleLineIn {
	to {
		opacity: 1;
		transform: translateX(0);
	}
}
@keyframes titleStrokeFill {
	0% {
		color: transparent;
		-webkit-text-stroke: 1.5px rgba(28,73,142,.35);
	}
	100% {
		color: rgba(28,73,142,.12);
		-webkit-text-stroke: 1.5px rgba(28,73,142,.5);
	}
}

.intro-title-cn {
	font-size: 36px;
	color: var(--secondary);
	font-weight: 700;
	margin: 12px 0 0;
	line-height: 1.2;
}
.title-underline {
	position: relative;
	display: inline-block;
}
.title-underline::after {
	content: '';
	position: absolute;
	bottom: -4px;
	left: 0;
	width: 0;
	height: 3px;
	background: linear-gradient(90deg, var(--primary), var(--secondary));
	border-radius: 2px;
	transition: width .8s cubic-bezier(.22, 1, .36, 1);
}
.intro-section.in-view .title-underline::after {
	width: 100%;
}

.intro-tagline {
	display: flex;
	align-items: center;
	gap: 12px;
	font-size: var(--font-body);
	color: var(--secondary);
	font-weight: 500;
	white-space: nowrap;
	padding-top: 12px;
}
.tag-word {
	position: relative;
	padding: 4px 12px;
	border-radius: 20px;
	transition: all .4s cubic-bezier(.22, 1, .36, 1);
	cursor: default;
}
.tag-word:hover {
	transform: translateY(-3px) scale(1.05);
	box-shadow: 0 8px 20px rgba(0,0,0,.1);
}
.tag-word[data-color="blue"]:hover { background: rgba(28,73,142,.1); color: var(--secondary); }
.tag-word[data-color="green"]:hover { background: rgba(46,204,113,.12); color: #27ae60; }
.tag-word[data-color="red"]:hover { background: rgba(211,38,41,.1); color: var(--primary); }
.intro-tagline i {
	display: inline-block;
	width: 3px;
	height: 14px;
	border-radius: 2px;
	animation: tagBarPulse 2s ease-in-out infinite;
}
.intro-tagline i:nth-child(2) { background: var(--secondary); animation-delay: 0s; }
.intro-tagline i:nth-child(4) { background: #2ecc71; animation-delay: .3s; }
.intro-tagline i:nth-child(6) { background: var(--primary); animation-delay: .6s; }
@keyframes tagBarPulse {
	0%, 100% { transform: scaleY(1); opacity: .6; }
	50% { transform: scaleY(1.4); opacity: 1; }
}

.intro-columns {
	display: flex;
	gap: 48px;
}
.intro-col {
	flex: 1;
}
.intro-col p {
	font-size: var(--font-body);
	line-height: 2;
	color: var(--text);
	margin: 0 0 20px;
	text-align: justify;
}
.intro-col-en p {
	font-size: 15px;
	line-height: 1.9;
	color: var(--text-light);
}

.reveal-text {
	opacity: 0;
	transform: translateY(24px);
	transition: opacity .8s cubic-bezier(.22, 1, .36, 1), transform .8s cubic-bezier(.22, 1, .36, 1);
}
.reveal-text.revealed {
	opacity: 1;
	transform: translateY(0);
}

@media (max-width: 1199px) {
	.intro-section-inner {
		padding: 40px 40px 380px;
	}
	.intro-title-en { font-size: 42px; }
	.intro-title-cn { font-size: 30px; }
	.intro-columns { gap: 32px; }
}

@media (max-width: 991px) {
	.intro-columns {
		flex-direction: column;
		gap: 0;
	}
	.intro-section-inner {
		padding: 32px 28px 320px;
	}
	.intro-head {
		flex-direction: column;
		margin-bottom: 28px;
	}
	.intro-tagline { padding-top: 0; }
}

@media (max-width: 767px) {
	.intro-title-en { font-size: 28px; }
	.intro-title-cn { font-size: 24px; }
	.intro-section-inner { padding: 24px 20px 240px; }
	.intro-col p { font-size: 15px; line-height: 1.85; }
	.intro-col-en p { font-size: 14px; }
}