/* 易好呼助手 - 产品介绍页样式 */
:root {
	--yhh-primary: #667eea;
	--yhh-primary-dark: #764ba2;
	--yhh-bg: #f4f6fb;
	--yhh-text: #333;
	--yhh-muted: #666;
}

/* ---- 导航 ---- */
.yhh-header {
	background: #fff;
	box-shadow: 0 2px 12px rgba(0,0,0,0.06);
	position: sticky;
	top: 0;
	z-index: 1000;
}

.yhh-header .top-strip {
	background: var(--yhh-bg);
	padding: 0.6em 0;
}

.yhh-header .header-top {
	padding: 0.8em 0;
}

.logo a h3 {
	color: var(--yhh-primary) !important;
	font-size: 1.6em !important;
	font-weight: 700 !important;
}

.top-menu nav ul li a {
	color: #555;
	font-weight: 500;
	transition: color 0.2s;
}

.top-menu nav ul li a.active {
	color: var(--yhh-primary) !important;
	font-weight: 700;
}

.top-menu nav ul li a.active::after {
	content: '';
	display: block;
	width: 100%;
	height: 2px;
	margin-top: 4px;
	background: var(--yhh-primary);
	border-radius: 1px;
}

.top-menu nav ul li a:hover {
	color: var(--yhh-primary);
}

/* 锚点滚动时避开固定导航栏 */
#home,
#product,
#features,
#scenes,
#download,
#contact {
	scroll-margin-top: 110px;
}

/* ---- 通用区块 ---- */
.yhh-section {
	padding: 64px 0;
}

.yhh-section.gray {
	background: var(--yhh-bg);
}

.yhh-section-head {
	text-align: center;
	margin-bottom: 48px;
}

.yhh-title {
	font-size: 2em;
	font-weight: 700;
	color: var(--yhh-text);
	margin: 0 0 12px;
}

.yhh-subtitle {
	font-size: 1.05em;
	color: #999;
	margin: 0;
}

/* ---- Hero ---- */
.yhh-hero-wrap {
	background: linear-gradient(135deg, var(--yhh-primary) 0%, var(--yhh-primary-dark) 100%);
	padding: 72px 0 80px;
	color: #fff;
}

.yhh-hero-inner {
	display: flex;
	align-items: center;
	gap: 48px;
}

.yhh-hero-text {
	flex: 1;
}

.yhh-hero-text h1 {
	font-size: 2.8em;
	font-weight: 700;
	color: #fff;
	margin: 0 0 12px;
}

.yhh-hero-text .hero-sub {
	font-size: 1.3em;
	opacity: 0.92;
	margin-bottom: 16px;
}

.yhh-hero-text .hero-desc {
	font-size: 1em;
	opacity: 0.85;
	line-height: 1.7;
	margin-bottom: 24px;
	max-width: 480px;
}

.yhh-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin-bottom: 28px;
}

.yhh-chip {
	font-size: 0.85em;
	padding: 6px 18px;
	border-radius: 999px;
	background: rgba(255,255,255,0.2);
	border: 1px solid rgba(255,255,255,0.35);
}

.yhh-hero-btns .btn-yhh {
	display: inline-block;
	padding: 12px 32px;
	margin-right: 12px;
	border-radius: 999px;
	font-size: 0.95em;
	text-decoration: none;
	transition: opacity 0.2s, transform 0.2s;
}

.yhh-hero-btns .btn-yhh:hover {
	opacity: 0.9;
	transform: translateY(-1px);
	text-decoration: none;
}

.btn-yhh-primary {
	background: #fff;
	color: var(--yhh-primary) !important;
	font-weight: 600;
}

.btn-yhh-outline {
	background: transparent;
	color: #fff !important;
	border: 2px solid rgba(255,255,255,0.7);
}

.yhh-hero-visual {
	flex: 0 0 320px;
	text-align: center;
}

.hero-product-img {
	max-width: 280px;
	border-radius: 16px;
	box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

/* ---- 产品介绍 ---- */
.yhh-product-intro {
	max-width: 800px;
	margin: 0 auto 40px;
	text-align: center;
	font-size: 1.05em;
	color: var(--yhh-muted);
	line-height: 1.8;
}

.yhh-terminal-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 20px;
}

.yhh-terminal-card {
	flex: 1;
	min-width: 220px;
	background: #fff;
	border-radius: 12px;
	padding: 28px 24px;
	text-align: center;
	box-shadow: 0 4px 20px rgba(0,0,0,0.06);
	border: 1px solid #eee;
	transition: transform 0.2s, box-shadow 0.2s;
}

.yhh-terminal-card:hover {
	transform: translateY(-4px);
	box-shadow: 0 8px 28px rgba(102,126,234,0.15);
}

.yhh-terminal-card .terminal-icon {
	font-size: 2.4em;
	margin-bottom: 12px;
}

.yhh-terminal-card h4 {
	font-size: 1.05em;
	font-weight: 600;
	color: var(--yhh-text);
	margin-bottom: 10px;
}

.yhh-terminal-card p {
	font-size: 0.88em;
	color: var(--yhh-muted);
	line-height: 1.55;
	margin: 0;
}

/* ---- 功能特色 ---- */
.yhh-feat-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 20px;
}

.yhh-feat-card {
	flex: 1;
	min-width: 240px;
	max-width: calc(25% - 15px);
	background: #fff;
	border-radius: 12px;
	overflow: hidden;
	box-shadow: 0 4px 16px rgba(0,0,0,0.05);
	transition: transform 0.2s, box-shadow 0.2s;
}

.yhh-feat-card:hover {
	transform: translateY(-3px);
	box-shadow: 0 8px 24px rgba(102,126,234,0.12);
}

.yhh-feat-card .feat-img {
	height: 140px;
	overflow: hidden;
	background: #f0f2f8;
}

.yhh-feat-card .feat-img img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: top;
}

.yhh-feat-card.feat-no-img {
	padding: 28px 20px;
	text-align: center;
}

.yhh-feat-card .feat-icon-lg {
	font-size: 2.4em;
	margin-bottom: 12px;
}

.yhh-feat-card .feat-icon-svg svg {
	width: 64px;
	height: 64px;
	display: block;
	margin: 0 auto;
}

.yhh-feat-card h4 {
	font-size: 1em;
	font-weight: 600;
	color: var(--yhh-text);
	padding: 16px 16px 8px;
	margin: 0;
}

.yhh-feat-card.feat-no-img h4 {
	padding-top: 0;
}

.yhh-feat-card p {
	font-size: 0.85em;
	color: var(--yhh-muted);
	line-height: 1.55;
	padding: 0 16px 20px;
	margin: 0;
}

/* ---- 应用场景 ---- */
.yhh-scene-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 24px;
}

.yhh-scene-item {
	flex: 1;
	min-width: 260px;
	text-align: center;
	padding: 36px 28px;
	background: #fff;
	border-radius: 12px;
	box-shadow: 0 4px 20px rgba(0,0,0,0.06);
	transition: transform 0.2s;
}

.yhh-scene-item:hover {
	transform: translateY(-4px);
}

.yhh-scene-item img {
	width: 80px;
	height: 80px;
	object-fit: contain;
	margin-bottom: 20px;
}

.yhh-scene-item h4 {
	font-size: 1.15em;
	font-weight: 600;
	color: var(--yhh-text);
	margin-bottom: 12px;
}

.yhh-scene-item p {
	font-size: 0.9em;
	color: var(--yhh-muted);
	line-height: 1.6;
	margin: 0;
}

/* ---- 立即体验 ---- */
.yhh-download-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 20px;
	margin-bottom: 40px;
}

.yhh-download-card {
	flex: 1;
	min-width: 200px;
	max-width: calc(25% - 15px);
	background: #fff;
	border-radius: 12px;
	padding: 32px 24px;
	text-align: center;
	box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.yhh-download-card h4 {
	font-size: 1.1em;
	font-weight: 600;
	color: var(--yhh-text);
	margin-bottom: 6px;
}

.yhh-download-card .dl-desc {
	font-size: 0.85em;
	color: #999;
	margin-bottom: 16px;
}

.yhh-download-card img.dl-icon {
	max-width: 80px;
	max-height: 80px;
	width: auto;
	height: auto;
	border-radius: 0;
	margin: 8px auto 16px;
	display: block;
	object-fit: contain;
}

.yhh-download-card img.dl-qr {
	max-width: 90px;
	max-height: 90px;
}

.yhh-download-card .dl-icon-svg svg {
	width: 80px;
	height: 80px;
	display: block;
	margin: 8px auto 16px;
}

.btn-download {
	display: inline-block;
	background: linear-gradient(135deg, #42bd56, #a0deaa);
	color: #fff !important;
	padding: 10px 28px;
	border-radius: 999px;
	font-weight: 600;
	font-size: 0.9em;
	text-decoration: none;
	transition: opacity 0.2s;
}

.btn-download:hover {
	opacity: 0.9;
	text-decoration: none;
	color: #fff;
}

.yhh-steps-wrap {
	background: #fff;
	border-radius: 12px;
	padding: 32px;
	box-shadow: 0 4px 16px rgba(0,0,0,0.05);
}

.yhh-steps-wrap h4 {
	font-size: 1.05em;
	font-weight: 600;
	color: var(--yhh-text);
	margin-bottom: 24px;
	text-align: center;
}

.yhh-steps-flow {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 8px;
}

.yhh-steps-flow .step-item {
	display: flex;
	align-items: center;
	gap: 8px;
	font-size: 0.88em;
	color: var(--yhh-muted);
}

.yhh-steps-flow .step-num {
	width: 26px;
	height: 26px;
	line-height: 26px;
	text-align: center;
	border-radius: 50%;
	background: linear-gradient(135deg, var(--yhh-primary), var(--yhh-primary-dark));
	color: #fff;
	font-size: 0.8em;
	font-weight: 600;
	flex-shrink: 0;
}

.yhh-steps-flow .step-arrow {
	color: #ccc;
	font-size: 1.2em;
}

.yhh-note {
	font-size: 0.85em;
	color: #999;
	text-align: center;
	margin: 20px 0 0;
	line-height: 1.6;
}

/* ---- 联系我们 ---- */
.yhh-contact-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 40px;
	align-items: flex-start;
}

.yhh-contact-info {
	flex: 1;
	min-width: 300px;
}

.contact-intro {
	font-size: 0.95em;
	color: var(--yhh-muted);
	line-height: 1.7;
	margin-bottom: 24px;
}

.contact-list {
	list-style: none;
	padding: 0;
	margin: 0 0 20px;
}

.contact-list li {
	padding: 10px 0;
	font-size: 0.95em;
	color: var(--yhh-muted);
	border-bottom: 1px solid #f0f0f0;
}

.contact-list li strong {
	display: inline-block;
	width: 48px;
	color: var(--yhh-text);
}

.contact-list a {
	color: var(--yhh-primary);
}

.contact-links a {
	color: var(--yhh-primary);
	margin-right: 16px;
	font-size: 0.9em;
}

.yhh-contact-map {
	flex: 0 0 360px;
}

.yhh-contact-map img {
	border-radius: 12px;
	box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

/* ---- 响应式 ---- */
@media (max-width: 992px) {
	.yhh-feat-card {
		max-width: calc(50% - 10px);
	}
	.yhh-download-card {
		max-width: calc(50% - 10px);
	}
}

@media (max-width: 768px) {
	.yhh-hero-inner {
		flex-direction: column;
		text-align: center;
		gap: 32px;
	}

	.yhh-hero-text .hero-desc {
		max-width: none;
	}

	.yhh-hero-text h1 {
		font-size: 2em;
	}

	.yhh-chips,
	.yhh-hero-btns {
		justify-content: center;
	}

	.yhh-hero-visual {
		flex: none;
	}

	.yhh-feat-card {
		max-width: 100%;
		min-width: 100%;
	}

	.yhh-steps-flow .step-arrow {
		display: none;
	}

	.yhh-steps-flow .step-item {
		width: 100%;
		justify-content: flex-start;
		padding: 6px 0;
	}

	.yhh-download-card {
		max-width: 100%;
		min-width: 100%;
	}

	.yhh-contact-map {
		flex: none;
		width: 100%;
	}
}

@media (max-width: 480px) {
	.yhh-section {
		padding: 48px 0;
	}

	.yhh-title {
		font-size: 1.6em;
	}
}