/* ==== chem/index.html Banner（版式参考 duanyun-site hero：浅底清爽 + 左文案右视觉 + 三卖点卡）
   仅作用于 .chem-hero 作用域，避免影响页面其他版块（化学模板列表 / 案例展示）
   色系与首页 .sv-hero 严格对齐：玉青 #12a594 / 深玉青 #0e7c6b / 铜金 #c8873f ==== */
.chem-hero {
	position: relative;
	overflow: hidden;
	--chem-jade: #12a594;
	--chem-jade-deep: #0e7c6b;
	--chem-copper: #c8873f;
	padding: clamp(44px, 5vw, 72px) 20px 0;
	background-image:
		radial-gradient(880px 520px at 82% 6%, rgba(18, 165, 148, .14), transparent 62%),
		radial-gradient(720px 460px at 2% 96%, rgba(200, 135, 63, .12), transparent 60%),
		linear-gradient(170deg, #fafdfc 0%, #f1f8f6 52%, #eaf4f2 100%);
}
.chem-hero::before {
	content: "";
	position: absolute;
	inset: 0;
	pointer-events: none;
	background-image:
		linear-gradient(to right, rgba(11, 31, 28, .045) 1px, transparent 1px),
		linear-gradient(to bottom, rgba(11, 31, 28, .045) 1px, transparent 1px);
	background-size: 74px 74px;
	-webkit-mask-image: radial-gradient(circle at 62% 34%, #000 0%, transparent 78%);
	mask-image: radial-gradient(circle at 62% 34%, #000 0%, transparent 78%);
}
.chem-hero::after {
	content: "";
	position: absolute;
	left: 50%;
	bottom: 0;
	width: 76%;
	height: 1px;
	transform: translateX(-50%);
	background: linear-gradient(90deg, transparent, rgba(18, 165, 148, .26), transparent);
}
.chem-hero__inner {
	position: relative;
	z-index: 2;
	max-width: 1220px;
	margin: 0 auto;
	display: grid;
	grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
	gap: clamp(26px, 4.6vw, 60px);
	align-items: center;
}
.chem-hero__copy { min-width: 0; }
.chem-hero__eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	margin-bottom: 16px;
	font-size: 12px;
	letter-spacing: .18em;
	text-transform: uppercase;
	color: var(--chem-jade-deep);
}
.chem-hero__eyebrow::before {
	content: "";
	width: 24px;
	height: 1px;
	background: var(--chem-copper);
}
.chem-hero__title {
	margin: 0 0 20px;
	color: #10312c;
	font-size: clamp(27px, 3.6vw, 46px);
	line-height: 1.2;
	letter-spacing: -.01em;
	font-weight: 700;
}
.chem-hero__title em {
	font-style: normal;
	color: var(--chem-jade-deep);
	white-space: nowrap;
}
.chem-hero__lead {
	margin: 0;
	max-width: 48ch;
	color: #4c6b66;
	font-size: clamp(14px, 1.05vw, 16px);
	line-height: 1.9;
}
.chem-hero__tags {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-top: 24px;
}
.chem-hero__tag {
	font-size: 12px;
	letter-spacing: .08em;
	color: #2f5852;
	border: 1px solid rgba(18, 165, 148, .26);
	border-radius: 999px;
	padding: 6px 13px;
	background: rgba(255, 255, 255, .68);
}
.chem-hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	margin-top: 32px;
}
.chem-hero__btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	height: 46px;
	padding: 0 24px;
	border-radius: 999px;
	font-size: 14.5px;
	transition: transform .3s cubic-bezier(.22, 1, .36, 1), box-shadow .3s, background .3s, border-color .3s;
}
.chem-hero__btn svg { width: 16px; height: 16px; }
.chem-hero a:focus-visible {
	outline: 2px solid #0e7c6b;
	outline-offset: 3px;
	border-radius: 999px;
}
.chem-hero__btn--main {
	color: #ffffff;
	background: linear-gradient(120deg, #0e7c6b, #0a6152);
	box-shadow: 0 14px 30px -14px rgba(10, 97, 82, .55);
}
.chem-hero__btn--ghost {
	color: var(--chem-jade-deep);
	border: 1px solid rgba(18, 165, 148, .34);
	background: rgba(255, 255, 255, .6);
}
@media (hover: hover) {
	.chem-hero__btn--main:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -12px rgba(18, 165, 148, .72); }
	.chem-hero__btn--ghost:hover { transform: translateY(-2px); border-color: rgba(18, 165, 148, .6); background: rgba(255, 255, 255, .92); }
}
.chem-hero__visual {
	position: relative;
	aspect-ratio: 1 / 1;
	min-height: 260px;
	max-width: 470px;
	width: 100%;
	margin-left: auto;
}
.chem-hero__visual svg { width: 100%; height: 100%; overflow: hidden; }
.chem-hero .mol-spin { transform-origin: 260px 260px; animation: chemSpin 72s linear infinite; }
.chem-hero .mol-spin--rev { transform-origin: 260px 260px; animation: chemSpin 96s linear infinite reverse; }
.chem-hero .mol-node { animation: chemPulse 4.6s ease-in-out infinite; }
.chem-hero .mol-node:nth-of-type(2n) { animation-delay: 1.2s; }
.chem-hero .mol-node:nth-of-type(3n) { animation-delay: 2.4s; }
.chem-hero__badge {
	position: absolute;
	padding: 10px 15px;
	border-radius: 12px;
	background: rgba(255, 255, 255, .94);
	border: 1px solid rgba(18, 165, 148, .16);
	box-shadow: 0 18px 40px -26px rgba(11, 54, 48, .42);
}
.chem-hero__badge b { display: block; color: var(--chem-jade-deep); font-size: 13px; letter-spacing: .02em; }
.chem-hero__badge span { font-size: 12px; color: #5d7e78; }
.chem-hero__badge--a { top: 2%; right: 0; animation: chemFloat 8s ease-in-out infinite; }
.chem-hero__badge--b { bottom: 6%; left: 0; animation: chemFloat 10s ease-in-out infinite reverse; }
.chem-hero__adv {
	position: relative;
	z-index: 2;
	max-width: 1220px;
	margin: clamp(36px, 5vw, 62px) auto 0;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 18px;
	padding-bottom: clamp(42px, 5vw, 70px);
}
.chem-hero__card {
	position: relative;
	overflow: hidden;
	padding: 24px 22px;
	border-radius: 14px;
	background: rgba(255, 255, 255, .86);
	border: 1px solid rgba(18, 165, 148, .16);
	box-shadow: 0 6px 18px -12px rgba(11, 54, 48, .28);
	transition: transform .4s cubic-bezier(.22, 1, .36, 1), border-color .4s, box-shadow .4s;
}
.chem-hero__card::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	width: 100%;
	height: 1px;
	opacity: .55;
	background: linear-gradient(90deg, var(--chem-copper), var(--chem-jade));
}
.chem-hero__card-no { font-size: 12px; letter-spacing: .16em; color: #557872; }
.chem-hero__card-ic {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	margin: 12px 0;
	border-radius: 10px;
	color: var(--chem-jade-deep);
	background: rgba(18, 165, 148, .1);
	border: 1px solid rgba(18, 165, 148, .28);
}
.chem-hero__card-ic svg { width: 20px; height: 20px; }
.chem-hero__card h3 { margin: 0 0 8px; font-size: 17px; color: #0d2b26; font-weight: 700; }
.chem-hero__card p { margin: 0; font-size: 13.5px; line-height: 1.8; color: #52716b; }
@media (hover: hover) {
	.chem-hero__card:hover { transform: translateY(-6px); border-color: rgba(18, 165, 148, .34); box-shadow: 0 26px 50px -30px rgba(11, 54, 48, .32); }
}
.chem-hero .chem-rise { animation: chemRise .9s cubic-bezier(.22, 1, .36, 1) both; animation-delay: var(--d, 0ms); }
@keyframes chemRise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes chemSpin { to { transform: rotate(360deg); } }
@keyframes chemFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-11px); } }
@keyframes chemPulse { 0%, 100% { opacity: .45; } 50% { opacity: 1; } }
@media (max-width: 980px) {
	.chem-hero { padding-top: clamp(38px, 5vw, 58px); }
	.chem-hero__inner { grid-template-columns: minmax(0, 1fr); gap: 30px; }
	.chem-hero__visual { max-width: 400px; margin: 0 auto; }
	.chem-hero__adv { gap: 14px; }
	.chem-hero__title br { display: none; }
}
@media (max-width: 820px) {
	.chem-hero__adv { grid-template-columns: minmax(0, 1fr); }
	.chem-hero__badge { display: none; }
	.chem-hero .mol-label { display: none; }
}
@media (max-width: 520px) {
	.chem-hero__card { padding: 20px 18px; }
}
@media (max-width: 420px) {
	.chem-hero__btn { flex: 1 1 100%; }
}
@media (prefers-reduced-motion: reduce) {
	.chem-hero .chem-rise,
	.chem-hero .mol-spin,
	.chem-hero .mol-spin--rev,
	.chem-hero .mol-node,
	.chem-hero__badge { animation: none !important; }
	.chem-hero__card,
	.chem-hero__btn { transition: none !important; }
	.chem-hero__card:hover,
	.chem-hero__btn:hover { transform: none !important; }
}