/* =========================================================================
   雁门云中科技 · 官网设计系统  (yanmen.css)
   风格：云中·科技 —— 明亮通透的浅色画布 + 紫罗兰→洋红标志性渐变（创造·愉悦）
   说明：全站页头 / 页脚 / 首页共用；组件类均以 .ym- 前缀，避免影响
        产品详情页的 Bootstrap 栅格与既有布局。
   ========================================================================= */

:root {
	--ym-canvas: #f8f7fc;
	--ym-surface: #ffffff;
	--ym-surface-2: #f1edfb;
	--ym-ink: #1b1533;
	--ym-ink-soft: #453a5e;
	--ym-muted: #6b6480;
	--ym-line: rgba(27, 21, 51, .09);
	--ym-primary: #7c3aed;
	--ym-primary-ink: #6d28d9;
	--ym-cyan: #ec4899;
	--ym-accent: #ff9f43;
	--ym-grad: linear-gradient(120deg, #7c3aed 0%, #ec4899 100%);
	--ym-grad-soft: linear-gradient(120deg, rgba(124, 58, 237, .12), rgba(236, 72, 153, .12));
	--ym-footer: #171129;
	--ym-footer-ink: rgba(255, 255, 255, .70);
	--ym-shadow-sm: 0 2px 8px rgba(27, 21, 51, .06);
	--ym-shadow: 0 14px 40px -18px rgba(76, 40, 130, .30);
	--ym-shadow-lg: 0 28px 60px -24px rgba(76, 40, 130, .42);
	--ym-radius: 18px;
	--ym-radius-lg: 26px;
	--ym-maxw: 1180px;
	--ym-font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system,
		BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---- 基础（仅作用于 body 与 .ym- 组件，不触碰详情页栅格） ---- */
body {
	font-family: var(--ym-font);
	color: var(--ym-ink);
	background-color: var(--ym-canvas);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

.ym-scope,
.ym-scope * {
	box-sizing: border-box;
}

.ym-container {
	width: 100%;
	max-width: var(--ym-maxw);
	margin: 0 auto;
	padding: 0 24px;
}

/* 首页内容整体居中 */
.ym-main {
	overflow-x: hidden;
}

/* =========================================================================
   页头导航（.ym-nav）—— 首页与详情页共用，纯 CSS 汉堡菜单，无 JS 依赖
   ========================================================================= */
.ym-nav {
	position: sticky;
	top: 0;
	z-index: 900;
	background: rgba(255, 255, 255, .82);
	backdrop-filter: saturate(180%) blur(14px);
	-webkit-backdrop-filter: saturate(180%) blur(14px);
	border-bottom: 1px solid var(--ym-line);
}

.ym-nav__inner {
	max-width: var(--ym-maxw);
	margin: 0 auto;
	padding: 0 24px;
	height: 68px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
}

.ym-brand {
	display: inline-flex;
	align-items: center;
	gap: 12px;
	text-decoration: none;
	white-space: nowrap;
}

.ym-brand__mark {
	width: 38px;
	height: 38px;
	border-radius: 11px;
	background: var(--ym-grad);
	color: #fff;
	font-size: 20px;
	font-weight: 800;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	box-shadow: 0 6px 16px -6px rgba(124, 58, 237, .6);
}

.ym-brand__text {
	display: flex;
	flex-direction: column;
	line-height: 1.1;
}

.ym-brand__zh {
	font-size: 18px;
	font-weight: 800;
	color: var(--ym-ink);
	letter-spacing: .5px;
}

.ym-brand__en {
	font-size: 10px;
	font-weight: 600;
	letter-spacing: 2px;
	color: var(--ym-muted);
	text-transform: uppercase;
}

.ym-nav__links {
	display: flex;
	align-items: center;
	gap: 4px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.ym-nav__links a {
	display: inline-block;
	padding: 9px 16px;
	border-radius: 10px;
	font-size: 15px;
	font-weight: 600;
	color: var(--ym-ink);
	text-decoration: none;
	transition: color .2s, background-color .2s;
}

.ym-nav__links a:hover {
	color: var(--ym-primary);
	background: var(--ym-grad-soft);
}

.ym-nav__cta {
	background: var(--ym-grad);
	color: #fff !important;
	box-shadow: 0 8px 18px -8px rgba(124, 58, 237, .7);
}

.ym-nav__cta:hover {
	color: #fff !important;
	filter: brightness(1.05);
}

/* 汉堡（移动端） */
.ym-nav__toggle,
.ym-nav__check {
	display: none;
}

.ym-nav__burger {
	display: none;
	width: 44px;
	height: 44px;
	border-radius: 12px;
	cursor: pointer;
	align-items: center;
	justify-content: center;
	border: 1px solid var(--ym-line);
	background: #fff;
}

.ym-nav__burger span,
.ym-nav__burger span::before,
.ym-nav__burger span::after {
	content: "";
	display: block;
	width: 20px;
	height: 2px;
	background: var(--ym-ink);
	border-radius: 2px;
	position: relative;
	transition: transform .25s, opacity .25s;
}

.ym-nav__burger span::before { position: absolute; top: -6px; }
.ym-nav__burger span::after { position: absolute; top: 6px; }

@media (max-width: 900px) {
	.ym-nav__burger { display: inline-flex; }
	.ym-nav__links {
		position: absolute;
		left: 0;
		right: 0;
		top: 68px;
		flex-direction: column;
		align-items: stretch;
		gap: 2px;
		background: #fff;
		border-bottom: 1px solid var(--ym-line);
		padding: 12px 20px 20px;
		box-shadow: var(--ym-shadow);
		max-height: 0;
		overflow: hidden;
		opacity: 0;
		pointer-events: none;
		transition: max-height .3s ease, opacity .2s;
	}
	.ym-nav__check:checked ~ .ym-nav__links {
		max-height: 460px;
		opacity: 1;
		pointer-events: auto;
	}
	.ym-nav__links a { padding: 13px 14px; font-size: 16px; }
	.ym-nav__check:checked ~ .ym-nav__burger span { background: transparent; }
	.ym-nav__check:checked ~ .ym-nav__burger span::before { transform: translateY(6px) rotate(45deg); }
	.ym-nav__check:checked ~ .ym-nav__burger span::after { transform: translateY(-6px) rotate(-45deg); }
}

/* =========================================================================
   通用区块标题
   ========================================================================= */
.ym-section { padding: 84px 0; position: relative; }
.ym-section--tight { padding: 60px 0; }

.ym-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }

.ym-eyebrow {
	display: inline-block;
	font-size: 13px;
	font-weight: 700;
	letter-spacing: 3px;
	text-transform: uppercase;
	padding: 6px 14px;
	border-radius: 999px;
	background: var(--ym-grad-soft);
	color: var(--ym-primary-ink);
	margin-bottom: 18px;
}

.ym-h2 {
	font-size: clamp(28px, 4vw, 42px);
	font-weight: 800;
	line-height: 1.2;
	letter-spacing: -.5px;
	margin: 0 0 16px;
	color: var(--ym-ink);
}

.ym-gradient-text {
	background: var(--ym-grad);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
	color: transparent;
}

.ym-lead {
	font-size: 17px;
	line-height: 1.8;
	color: var(--ym-muted);
	margin: 0;
}

/* =========================================================================
   按钮
   ========================================================================= */
.ym-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 14px 30px;
	border-radius: 999px;
	font-size: 16px;
	font-weight: 700;
	text-decoration: none;
	cursor: pointer;
	border: 0;
	transition: transform .2s, box-shadow .2s, filter .2s;
}

.ym-btn--primary {
	background: var(--ym-grad);
	color: #fff;
	box-shadow: 0 14px 30px -12px rgba(124, 58, 237, .75);
}

.ym-btn--primary:hover {
	transform: translateY(-2px);
	filter: brightness(1.05);
	color: #fff;
}

.ym-btn--ghost {
	background: #fff;
	color: var(--ym-ink);
	border: 1px solid var(--ym-line);
}

.ym-btn--ghost:hover {
	transform: translateY(-2px);
	border-color: var(--ym-primary);
	color: var(--ym-primary);
}

/* =========================================================================
   Hero 首屏
   ========================================================================= */
.ym-hero {
	position: relative;
	text-align: center;
	padding: 96px 0 84px;
	overflow: hidden;
	background:
		radial-gradient(60% 55% at 20% 0%, rgba(124, 58, 237, .16), transparent 60%),
		radial-gradient(55% 55% at 85% 10%, rgba(236, 72, 153, .18), transparent 60%),
		linear-gradient(180deg, #efeafe 0%, var(--ym-canvas) 65%);
}

.ym-hero__inner { position: relative; z-index: 2; max-width: 860px; margin: 0 auto; }

.ym-hero h1 {
	font-size: clamp(34px, 6vw, 62px);
	font-weight: 900;
	line-height: 1.12;
	letter-spacing: -1px;
	margin: 22px 0 20px;
	color: var(--ym-ink);
}

.ym-hero p {
	font-size: clamp(16px, 2.2vw, 20px);
	line-height: 1.85;
	color: var(--ym-muted);
	max-width: 640px;
	margin: 0 auto 34px;
}

.ym-hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.ym-hero__stats {
	display: flex;
	justify-content: center;
	gap: clamp(28px, 6vw, 72px);
	margin-top: 64px;
	flex-wrap: wrap;
}

.ym-stat__num {
	font-size: clamp(28px, 4vw, 40px);
	font-weight: 800;
	background: var(--ym-grad);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
}

.ym-stat__label { font-size: 14px; color: var(--ym-muted); margin-top: 4px; }

/* 漂浮光斑 */
.ym-hero__blob {
	position: absolute;
	border-radius: 50%;
	filter: blur(60px);
	opacity: .5;
	z-index: 1;
}
.ym-hero__blob--1 { width: 320px; height: 320px; background: #7c3aed; top: -80px; left: -60px; }
.ym-hero__blob--2 { width: 280px; height: 280px; background: #ec4899; bottom: -100px; right: -40px; }

/* =========================================================================
   产品网格
   ========================================================================= */
.ym-apps {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 22px;
}

.ym-app-card {
	display: block;
	text-decoration: none;
	background: var(--ym-surface);
	border: 1px solid var(--ym-line);
	border-radius: var(--ym-radius);
	padding: 28px 22px;
	text-align: center;
	transition: transform .25s, box-shadow .25s, border-color .25s;
	position: relative;
	overflow: hidden;
}

.ym-app-card::before {
	content: "";
	position: absolute;
	inset: 0 0 auto 0;
	height: 4px;
	background: var(--ym-grad);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform .3s;
}

.ym-app-card:hover {
	transform: translateY(-6px);
	box-shadow: var(--ym-shadow-lg);
	border-color: transparent;
}

.ym-app-card:hover::before { transform: scaleX(1); }

.ym-app-card__icon {
	width: 76px;
	height: 76px;
	margin: 0 auto 18px;
	border-radius: 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--ym-grad-soft);
	overflow: hidden;
}

.ym-app-card__icon img {
	width: 60px;
	height: 60px;
	object-fit: contain;
	border-radius: 14px;
}

.ym-app-card__name {
	font-size: 17px;
	font-weight: 700;
	color: var(--ym-ink);
	margin: 0 0 8px;
}

.ym-app-card__desc {
	font-size: 13.5px;
	line-height: 1.65;
	color: var(--ym-muted);
	margin: 0;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

/* =========================================================================
   服务
   ========================================================================= */
.ym-svc {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 24px;
}

.ym-svc-card {
	background: var(--ym-surface);
	border: 1px solid var(--ym-line);
	border-radius: var(--ym-radius-lg);
	padding: 40px 32px;
	text-align: left;
	transition: transform .25s, box-shadow .25s;
}

.ym-svc-card:hover { transform: translateY(-6px); box-shadow: var(--ym-shadow); }

.ym-svc-card__ico {
	width: 60px;
	height: 60px;
	border-radius: 16px;
	background: var(--ym-grad);
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 22px;
	box-shadow: 0 12px 24px -12px rgba(124, 58, 237, .7);
}

.ym-svc-card__ico svg { width: 30px; height: 30px; stroke: #fff; fill: none; }

.ym-svc-card h3 {
	font-size: 21px;
	font-weight: 700;
	margin: 0 0 6px;
	color: var(--ym-ink);
}

.ym-svc-card h3 span { font-size: 13px; font-weight: 600; color: var(--ym-primary); letter-spacing: 1px; }

.ym-svc-card p { font-size: 15px; line-height: 1.85; color: var(--ym-muted); margin: 10px 0 0; }

/* =========================================================================
   关于我们
   ========================================================================= */
.ym-about { background: linear-gradient(180deg, #fff 0%, var(--ym-canvas) 100%); }

.ym-about__card {
	max-width: 900px;
	margin: 0 auto;
	background: var(--ym-surface);
	border: 1px solid var(--ym-line);
	border-radius: var(--ym-radius-lg);
	padding: clamp(34px, 5vw, 60px);
	box-shadow: var(--ym-shadow);
	text-align: center;
}

.ym-about__card p {
	font-size: 17px;
	line-height: 2;
	color: var(--ym-ink-soft, #453a5e);
	margin: 0 0 18px;
}

.ym-about__card p:last-child { margin-bottom: 0; }

/* =========================================================================
   联系我们
   ========================================================================= */
.ym-contact { background: var(--ym-surface); }

.ym-contact__grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 20px;
	max-width: 840px;
	margin: 0 auto;
}

.ym-contact-card {
	display: flex;
	align-items: center;
	gap: 18px;
	padding: 24px 26px;
	border: 1px solid var(--ym-line);
	border-radius: var(--ym-radius);
	background: var(--ym-canvas);
	transition: transform .2s, box-shadow .2s, border-color .2s;
	text-align: left;
}

.ym-contact-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--ym-shadow);
	border-color: transparent;
}

.ym-contact-card__ico {
	flex: 0 0 auto;
	width: 52px;
	height: 52px;
	border-radius: 14px;
	background: var(--ym-grad);
	display: flex;
	align-items: center;
	justify-content: center;
}

.ym-contact-card__ico svg { width: 26px; height: 26px; stroke: #fff; fill: none; }

.ym-contact-card__label { font-size: 13px; color: var(--ym-muted); margin: 0 0 3px; }

.ym-contact-card__value {
	font-size: 17px;
	font-weight: 700;
	color: var(--ym-ink);
	margin: 0;
	word-break: break-all;
}

.ym-contact-card--wide { grid-column: 1 / -1; }

/* =========================================================================
   页脚（.ym-footer）—— 全站共用
   ========================================================================= */
.ym-footer {
	background: var(--ym-footer);
	color: var(--ym-footer-ink);
	position: relative;
}

.ym-footer::before {
	content: "";
	display: block;
	height: 4px;
	background: var(--ym-grad);
}

.ym-footer__top {
	max-width: var(--ym-maxw);
	margin: 0 auto;
	padding: 60px 24px 40px;
	display: grid;
	grid-template-columns: 1.6fr 1fr 1.4fr;
	gap: 48px;
}

.ym-footer__brand-zh {
	font-size: 20px;
	font-weight: 800;
	color: #fff;
	margin: 0 0 14px;
	display: flex;
	align-items: center;
	gap: 12px;
}

.ym-footer__brand-zh .ym-brand__mark { width: 34px; height: 34px; font-size: 18px; }

.ym-footer__desc { font-size: 14px; line-height: 1.9; color: rgba(255, 255, 255, .55); margin: 0; max-width: 340px; }

.ym-footer__col h4 {
	font-size: 15px;
	font-weight: 700;
	color: #fff;
	margin: 0 0 18px;
}

.ym-footer__col ul { list-style: none; margin: 0; padding: 0; }
.ym-footer__col li { margin-bottom: 12px; }

.ym-footer__col a {
	color: rgba(255, 255, 255, .62);
	text-decoration: none;
	font-size: 14px;
	transition: color .2s;
}

.ym-footer__col a:hover { color: #fff; }

.ym-footer__contact p {
	font-size: 14px;
	line-height: 1.7;
	color: rgba(255, 255, 255, .62);
	margin: 0 0 10px;
	display: flex;
	gap: 8px;
}

.ym-footer__contact b { color: #fff; font-weight: 600; flex: 0 0 auto; }

.ym-footer__bottom {
	border-top: 1px solid rgba(255, 255, 255, .10);
}

.ym-footer__bottom-inner {
	max-width: var(--ym-maxw);
	margin: 0 auto;
	padding: 22px 24px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	flex-wrap: wrap;
	font-size: 13px;
	color: rgba(255, 255, 255, .5);
}

.ym-footer__bottom-inner a { color: rgba(255, 255, 255, .5); text-decoration: none; }
.ym-footer__bottom-inner a:hover { color: #fff; }

/* =========================================================================
   滚动淡入（有 JS 时启用，无 JS 则默认可见）
   ========================================================================= */
.ym-js .ym-reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.ym-js .ym-reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
	.ym-js .ym-reveal { opacity: 1; transform: none; transition: none; }
}

/* =========================================================================
   响应式
   ========================================================================= */
@media (max-width: 1024px) {
	.ym-apps { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
	.ym-section { padding: 60px 0; }
	.ym-footer__top { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 680px) {
	.ym-apps { grid-template-columns: repeat(2, 1fr); }
	.ym-svc { grid-template-columns: 1fr; }
	.ym-contact__grid { grid-template-columns: 1fr; }
	.ym-app-card { padding: 22px 16px; }
	.ym-hero { padding: 72px 0 60px; }
}

@media (max-width: 360px) {
	.ym-apps { grid-template-columns: 1fr; }
}