/* ============================================================
   筑鸡 - 落地页样式
   风格：浅色清新系（青绿主色）
   ============================================================ */

/* ---------- 变量与基础 ---------- */
:root {
	--primary-color: #00b38a;
	--primary-dark: #009a78;
	--secondary-color: #eaffd0;
	--accent-color: #fce38a;
	--warning-color: #f38181;
	--primary-gradient: linear-gradient(135deg, #00b38a 0%, #eaffd0 100%);
	--accent-gradient: linear-gradient(135deg, #fce38a 0%, #00b38a 100%);
	--warning-gradient: linear-gradient(135deg, #f38181 0%, #fce38a 100%);
	--dark-text: #1a202c;
	--text-color: #4a5568;
	--light-text: #718096;
	--border-color: #e2e8f0;
	--white: #ffffff;
	--light-bg: #f0fdf4;
	--shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
	--shadow-md: 0 8px 30px rgba(0, 0, 0, 0.1);
	--shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.15);
	--radius-sm: 8px;
	--radius-md: 16px;
	--radius-lg: 24px;
	--transition: all 0.3s ease;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
	scroll-padding-top: 72px;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', Roboto, sans-serif;
	color: var(--text-color);
	background: var(--white);
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	overflow-x: hidden;
}

.container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 24px;
}

img {
	max-width: 100%;
	display: block;
}

a {
	text-decoration: none;
	color: inherit;
}

ul {
	list-style: none;
}

/* ---------- 图标 ---------- */
.icon {
	width: 18px;
	height: 18px;
	fill: none;
	stroke: currentColor;
	stroke-width: 2;
	stroke-linecap: round;
	stroke-linejoin: round;
	vertical-align: -3px;
	flex-shrink: 0;
}

.icon-sm {
	width: 16px;
	height: 16px;
}

/* ---------- 按钮 ---------- */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 14px 32px;
	border-radius: 50px;
	font-size: 16px;
	font-weight: 600;
	border: none;
	cursor: pointer;
	transition: var(--transition);
}

.btn .icon {
	width: 18px;
	height: 18px;
}

.btn-primary {
	background: var(--primary-color);
	color: var(--white);
	box-shadow: 0 6px 20px rgba(0, 179, 138, 0.35);
}

.btn-primary:hover {
	background: var(--primary-dark);
	transform: translateY(-2px);
	box-shadow: 0 10px 28px rgba(0, 179, 138, 0.45);
}

.btn-secondary {
	background: var(--white);
	color: var(--primary-color);
	border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
	background: var(--secondary-color);
	transform: translateY(-2px);
}

.btn-large {
	padding: 16px 40px;
	font-size: 17px;
}

/* ---------- 导航栏 ---------- */
.navbar {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	background: rgba(255, 255, 255, 0.85);
	backdrop-filter: blur(10px);
	transition: var(--transition);
}

.navbar.scrolled {
	background: var(--white);
	box-shadow: var(--shadow-sm);
}

.nav-container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 24px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 72px;
}

.nav-logo {
	display: flex;
	align-items: center;
	gap: 10px;
	font-size: 22px;
	font-weight: 700;
	color: var(--dark-text);
}

.logo-img {
	width: 36px;
	height: 36px;
	border-radius: 8px;
	object-fit: cover;
}

.nav-menu {
	display: flex;
	align-items: center;
	gap: 32px;
}

.nav-link {
	font-size: 15px;
	font-weight: 500;
	color: var(--text-color);
	transition: var(--transition);
	position: relative;
}

.nav-link::after {
	content: '';
	position: absolute;
	bottom: -4px;
	left: 0;
	width: 0;
	height: 2px;
	background: var(--primary-color);
	transition: var(--transition);
}

.nav-link:hover {
	color: var(--primary-color);
}

.nav-link:hover::after {
	width: 100%;
}

.nav-toggle {
	display: none;
	flex-direction: column;
	gap: 5px;
	cursor: pointer;
	padding: 6px;
}

.nav-toggle .bar {
	width: 24px;
	height: 2px;
	background: var(--dark-text);
	border-radius: 2px;
	transition: var(--transition);
}

/* ---------- Hero ---------- */
.hero {
	position: relative;
	padding: 160px 0 100px;
	overflow: hidden;
	background: linear-gradient(135deg, #f8fffe 0%, #eaffd0 60%, #ffffff 100%);
}

.hero-container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 24px;
	display: grid;
	grid-template-columns: 1.05fr 0.95fr;
	gap: 60px;
	align-items: center;
	position: relative;
	z-index: 2;
}

.hero-title {
	font-size: 52px;
	font-weight: 800;
	color: var(--dark-text);
	line-height: 1.2;
	margin-bottom: 20px;
}

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

.typewriter {
	font-size: 52px;
	font-weight: 800;
	background: linear-gradient(135deg, #00b38a 0%, #00715a 100%);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
	color: transparent;
}

.cursor {
	display: inline-block;
	width: 3px;
	background: var(--primary-color);
	margin-left: 4px;
	animation: blink 0.8s infinite;
	color: transparent;
}

@keyframes blink {
	0%, 50% { opacity: 1; }
	51%, 100% { opacity: 0; }
}

.hero-subtitle {
	font-size: 18px;
	color: var(--text-color);
	line-height: 1.9;
	margin-bottom: 36px;
}

.hero-buttons {
	display: flex;
	gap: 16px;
	margin-bottom: 48px;
	flex-wrap: wrap;
}

.hero-stats {
	display: flex;
	gap: 48px;
}

.stat-item {
	display: flex;
	flex-direction: column;
	gap: 4px;
}

.stat-number {
	font-size: 26px;
	font-weight: 700;
	color: var(--dark-text);
}

.stat-label {
	font-size: 14px;
	color: var(--light-text);
}

.hero-visual {
	position: relative;
}

.hero-image {
	position: relative;
	border-radius: var(--radius-lg);
	overflow: hidden;
	box-shadow: var(--shadow-lg);
}

.dashboard-img {
	width: 100%;
	height: auto;
}

.floating-card {
	position: absolute;
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 10px 18px;
	background: var(--white);
	border-radius: 12px;
	box-shadow: var(--shadow-md);
	font-size: 14px;
	font-weight: 600;
	color: var(--dark-text);
	animation: float 3s ease-in-out infinite;
}

.floating-card .icon {
	color: var(--primary-color);
}

.card-1 {
	top: -18px;
	left: -24px;
}

.card-2 {
	top: 45%;
	right: -28px;
	animation-delay: 0.6s;
}

.card-3 {
	bottom: -16px;
	left: 12%;
	animation-delay: 1.2s;
}

@keyframes float {
	0%, 100% { transform: translateY(0); }
	50% { transform: translateY(-10px); }
}

.hero-background {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	z-index: 1;
}

.bg-gradient {
	position: absolute;
	top: -20%;
	right: -10%;
	width: 600px;
	height: 600px;
	background: radial-gradient(circle, rgba(149, 225, 211, 0.25) 0%, transparent 60%);
	border-radius: 50%;
}

.bg-pattern {
	position: absolute;
	inset: 0;
	background-image: radial-gradient(circle, rgba(0, 179, 138, 0.08) 1px, transparent 1px);
	background-size: 32px 32px;
	mask-image: linear-gradient(135deg, transparent 30%, black 100%);
	-webkit-mask-image: linear-gradient(135deg, transparent 30%, black 100%);
}

/* ---------- 通用区块 ---------- */
section {
	padding: 96px 0;
}

.section-header {
	text-align: center;
	max-width: 720px;
	margin: 0 auto 60px;
}

.section-title {
	font-size: 36px;
	font-weight: 800;
	color: var(--dark-text);
	margin-bottom: 16px;
	position: relative;
	display: inline-block;
}

.section-title::after {
	content: '';
	position: absolute;
	bottom: -10px;
	left: 50%;
	transform: translateX(-50%);
	width: 60px;
	height: 4px;
	border-radius: 2px;
	background: var(--primary-gradient);
}

.section-subtitle {
	font-size: 17px;
	color: var(--light-text);
	line-height: 1.8;
	margin-top: 16px;
}

/* ---------- 核心功能六卡 ---------- */
.features {
	background: var(--white);
}

.features-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 28px;
}

.feature-card {
	background: var(--light-bg);
	border: 1px solid rgba(0, 179, 138, 0.1);
	border-radius: var(--radius-md);
	padding: 36px 30px;
	transition: var(--transition);
}

.feature-card:hover {
	transform: translateY(-6px);
	box-shadow: var(--shadow-md);
	background: var(--white);
	border-color: rgba(0, 179, 138, 0.25);
}

.feature-icon {
	width: 56px;
	height: 56px;
	border-radius: 14px;
	background: var(--primary-gradient);
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 20px;
}

.feature-icon .icon {
	width: 26px;
	height: 26px;
	color: var(--white);
}

.feature-card h3 {
	font-size: 20px;
	font-weight: 700;
	color: var(--dark-text);
	margin-bottom: 10px;
}

.feature-card p {
	font-size: 15px;
	color: var(--text-color);
	line-height: 1.8;
}

/* ---------- Showcase 图文交替 ---------- */
.showcase {
	background: linear-gradient(135deg, #f0fdf4 0%, #f8fafc 100%);
}

.showcase .section-header {
	margin-bottom: 48px;
}

.showcase-item {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 60px;
	align-items: center;
}

.showcase-ai .showcase-item {
	grid-template-columns: 1.05fr 0.95fr;
}

.showcase-security .showcase-item {
	grid-template-columns: 0.95fr 1.05fr;
}

.showcase-info h3 {
	font-size: 28px;
	font-weight: 700;
	color: var(--dark-text);
	margin-bottom: 16px;
}

.showcase-info p {
	font-size: 16px;
	color: var(--text-color);
	line-height: 1.9;
	margin-bottom: 12px;
}

.showcase-info ul {
	margin-top: 20px;
}

.showcase-info ul li {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 8px 0;
	font-size: 15px;
	color: var(--text-color);
}

.showcase-info ul li .icon {
	color: var(--primary-color);
}

.showcase-image {
	border-radius: var(--radius-lg);
	overflow: hidden;
	box-shadow: var(--shadow-md);
	background: var(--white);
}

.showcase-image img {
	width: 100%;
	height: auto;
}

/* ---------- 使用流程 ---------- */
.workflow {
	background: var(--white);
}

.workflow-steps {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 16px;
	margin-bottom: 56px;
}

.step {
	flex: 1;
	max-width: 220px;
	text-align: center;
	position: relative;
	padding: 32px 20px;
	background: var(--light-bg);
	border-radius: var(--radius-md);
	border: 1px solid rgba(0, 179, 138, 0.1);
	transition: var(--transition);
}

.step:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-md);
}

.step-number {
	position: absolute;
	top: -14px;
	left: 50%;
	transform: translateX(-50%);
	width: 28px;
	height: 28px;
	border-radius: 50%;
	background: var(--primary-color);
	color: var(--white);
	font-size: 14px;
	font-weight: 700;
	display: flex;
	align-items: center;
	justify-content: center;
}

.step-icon {
	width: 48px;
	height: 48px;
	margin: 0 auto 14px;
	border-radius: 12px;
	background: var(--white);
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: var(--shadow-sm);
}

.step-icon .icon {
	color: var(--primary-color);
}

.step h3 {
	font-size: 17px;
	font-weight: 700;
	color: var(--dark-text);
	margin-bottom: 8px;
}

.step p {
	font-size: 14px;
	color: var(--light-text);
}

.step-arrow .icon {
	width: 28px;
	height: 28px;
	color: var(--primary-color);
	opacity: 0.6;
}

.workflow-image {
	max-width: 900px;
	margin: 0 auto;
	border-radius: var(--radius-lg);
	overflow: hidden;
	box-shadow: var(--shadow-md);
}

.workflow-img {
	width: 100%;
	height: auto;
}

/* ---------- 适用场景 ---------- */
.use-cases {
	background: linear-gradient(135deg, #f0fdf4 0%, #f8fafc 100%);
}

.use-cases-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 28px;
}

.use-case-card {
	background: var(--white);
	border-radius: var(--radius-md);
	padding: 30px 28px;
	border: 1px solid var(--border-color);
	transition: var(--transition);
}

.use-case-card:hover {
	transform: translateY(-6px);
	box-shadow: var(--shadow-md);
	border-color: rgba(0, 179, 138, 0.3);
}

.use-case-icon {
	width: 48px;
	height: 48px;
	border-radius: 12px;
	background: var(--secondary-color);
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 16px;
}

.use-case-icon .icon {
	width: 22px;
	height: 22px;
	color: var(--primary-color);
}

.use-case-card h3 {
	font-size: 18px;
	font-weight: 700;
	color: var(--dark-text);
	margin-bottom: 10px;
}

.use-case-card > p {
	font-size: 14px;
	color: var(--text-color);
	line-height: 1.8;
	margin-bottom: 16px;
}

.use-case-features {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.feature-tag {
	font-size: 12px;
	padding: 4px 12px;
	border-radius: 20px;
	background: var(--light-bg);
	color: var(--primary-color);
	border: 1px solid rgba(0, 179, 138, 0.15);
	font-weight: 500;
}

/* ---------- 用户评价 ---------- */
.testimonials {
	background: var(--white);
}

.testimonials-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 28px;
}

.testimonial-card {
	background: var(--light-bg);
	border-radius: var(--radius-md);
	padding: 32px 28px;
	border: 1px solid rgba(0, 179, 138, 0.1);
	transition: var(--transition);
}

.testimonial-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-md);
}

.stars {
	display: flex;
	gap: 4px;
	margin-bottom: 16px;
}

.stars .icon {
	width: 16px;
	height: 16px;
	fill: var(--accent-color);
	stroke: var(--accent-color);
}

.testimonial-content p {
	font-size: 15px;
	color: var(--text-color);
	line-height: 1.9;
	margin-bottom: 24px;
}

.testimonial-author {
	display: flex;
	align-items: center;
	gap: 12px;
}

.author-avatar {
	width: 44px;
	height: 44px;
	border-radius: 50%;
	background: var(--primary-gradient);
	color: var(--white);
	font-size: 17px;
	font-weight: 700;
	display: flex;
	align-items: center;
	justify-content: center;
}

.author-info h4 {
	font-size: 15px;
	font-weight: 700;
	color: var(--dark-text);
}

.author-info span {
	font-size: 13px;
	color: var(--light-text);
}

/* ---------- 价格 ---------- */
.pricing {
	background: linear-gradient(135deg, #f0fdf4 0%, #f8fafc 100%);
}

.pricing-grid {
	display: flex;
	justify-content: center;
}

.pricing-card {
	background: var(--white);
	border-radius: var(--radius-lg);
	padding: 48px 44px;
	max-width: 480px;
	width: 100%;
	box-shadow: var(--shadow-md);
	position: relative;
	border: 2px solid transparent;
}

.pricing-card.featured {
	border-color: var(--primary-color);
}

.pricing-badge {
	position: absolute;
	top: -14px;
	left: 50%;
	transform: translateX(-50%);
	background: var(--primary-gradient);
	color: var(--white);
	font-size: 13px;
	font-weight: 700;
	padding: 6px 20px;
	border-radius: 20px;
	white-space: nowrap;
}

.pricing-header {
	text-align: center;
	margin-bottom: 32px;
}

.pricing-title {
	font-size: 22px;
	font-weight: 700;
	color: var(--dark-text);
	margin-bottom: 20px;
}

.pricing-price {
	display: flex;
	align-items: baseline;
	justify-content: center;
	gap: 6px;
}

.price-currency {
	font-size: 26px;
	font-weight: 700;
	color: var(--primary-color);
}

.price-amount {
	font-size: 64px;
	font-weight: 800;
	color: var(--primary-color);
	line-height: 1;
}

.price-period {
	font-size: 14px;
	color: var(--light-text);
	display: block;
	text-align: center;
	margin-top: 8px;
}

.pricing-features {
	margin-bottom: 32px;
}

.pricing-features ul li {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 10px 0;
	font-size: 15px;
	color: var(--text-color);
	border-bottom: 1px dashed var(--border-color);
}

.pricing-features ul li:last-child {
	border-bottom: none;
}

.pricing-features ul li .icon {
	color: var(--primary-color);
}

.pricing-action {
	text-align: center;
}

/* ---------- CTA ---------- */
.cta {
	background: var(--primary-gradient);
	padding: 88px 0;
}

.cta-content {
	text-align: center;
	max-width: 720px;
	margin: 0 auto;
}

.cta-title {
	font-size: 36px;
	font-weight: 800;
	color: var(--dark-text);
	margin-bottom: 16px;
}

.cta-subtitle {
	font-size: 18px;
	color: #2c4a3e;
	line-height: 1.8;
	margin-bottom: 36px;
}

.cta-buttons {
	display: flex;
	justify-content: center;
	gap: 16px;
	margin-bottom: 36px;
	flex-wrap: wrap;
}

.cta .btn-primary {
	background: var(--dark-text);
	color: var(--white);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.cta .btn-primary:hover {
	background: #000;
}

.cta .btn-secondary {
	background: transparent;
	border-color: var(--dark-text);
	color: var(--dark-text);
}

.cta .btn-secondary:hover {
	background: rgba(255, 255, 255, 0.4);
}

.cta-features {
	display: flex;
	justify-content: center;
	gap: 32px;
	flex-wrap: wrap;
}

.cta-feature {
	display: flex;
	align-items: center;
	gap: 8px;
	font-size: 14px;
	font-weight: 600;
	color: #2c4a3e;
}

.cta-feature .icon {
	color: var(--dark-text);
}

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

.contact-grid {
	max-width: 720px;
	margin: 0 auto;
}

.contact-info {
	display: flex;
	flex-direction: column;
	gap: 20px;
}

.contact-item {
	display: flex;
	align-items: center;
	gap: 20px;
	padding: 24px 28px;
	background: var(--light-bg);
	border-radius: var(--radius-md);
	border: 1px solid rgba(0, 179, 138, 0.1);
	transition: var(--transition);
}

.contact-item:hover {
	box-shadow: var(--shadow-md);
	transform: translateY(-2px);
}

.contact-icon {
	width: 52px;
	height: 52px;
	border-radius: 14px;
	background: var(--primary-gradient);
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
}

.contact-icon .icon {
	width: 24px;
	height: 24px;
	color: var(--white);
}

.contact-details h3 {
	font-size: 16px;
	font-weight: 700;
	color: var(--dark-text);
	margin-bottom: 4px;
}

.contact-details p {
	font-size: 15px;
	color: var(--text-color);
}

.contact-details a {
	color: var(--primary-color);
	font-weight: 500;
}

.contact-details a:hover {
	text-decoration: underline;
}

/* ---------- Footer ---------- */
.footer {
	background: #1a2733;
	color: #a0aec0;
	padding: 64px 0 0;
}

.footer-content {
	display: grid;
	grid-template-columns: 1.6fr 1fr 1fr 1fr;
	gap: 40px;
	padding-bottom: 48px;
}

.footer-logo {
	display: flex;
	align-items: center;
	gap: 10px;
	font-size: 20px;
	font-weight: 700;
	color: var(--white);
	margin-bottom: 16px;
}

.footer-logo-img {
	width: 32px;
	height: 32px;
	border-radius: 8px;
	object-fit: cover;
}

.footer-description {
	font-size: 14px;
	line-height: 1.9;
	margin-bottom: 20px;
}

.social-links {
	display: flex;
	gap: 12px;
}

.social-link {
	width: 40px;
	height: 40px;
	border-radius: 10px;
	background: rgba(255, 255, 255, 0.08);
	display: flex;
	align-items: center;
	justify-content: center;
	transition: var(--transition);
}

.social-link:hover {
	background: var(--primary-color);
	color: var(--white);
}

.social-link .icon {
	width: 18px;
	height: 18px;
}

.footer-title {
	font-size: 16px;
	font-weight: 700;
	color: var(--white);
	margin-bottom: 20px;
}

.footer-links li {
	margin-bottom: 12px;
}

.footer-links a {
	font-size: 14px;
	color: #a0aec0;
	transition: var(--transition);
}

.footer-links a:hover {
	color: var(--primary-color);
}

.footer-bottom {
	border-top: 1px solid rgba(255, 255, 255, 0.08);
	padding: 24px 0;
	text-align: center;
}

.footer-copyright p {
	font-size: 13px;
	color: #718096;
}

.footer-trust {
	margin-top: 8px;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
	font-size: 13px;
}

.footer-trust .icon {
	color: var(--primary-color);
	width: 14px;
	height: 14px;
}

/* ---------- Image Modal ---------- */
.image-modal {
	display: none;
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: rgba(0, 0, 0, 0.85);
	z-index: 2000;
	align-items: center;
	justify-content: center;
	padding: 40px;
}

.image-modal.active {
	display: flex;
}

.modal-content {
	max-width: 90vw;
	max-height: 90vh;
	position: relative;
	animation: modalIn 0.3s ease;
}

@keyframes modalIn {
	from { transform: scale(0.9); opacity: 0; }
	to { transform: scale(1); opacity: 1; }
}

.modal-content img {
	max-width: 90vw;
	max-height: 82vh;
	object-fit: contain;
	border-radius: var(--radius-md);
	transform-origin: center center;
	cursor: grab;
	user-select: none;
	-webkit-user-select: none;
	touch-action: none;
}

.modal-content img.dragging {
	cursor: grabbing;
}

.modal-content img.zoom-anim {
	transition: transform 0.25s ease;
}

.modal-close {
	position: absolute;
	top: -46px;
	right: 0;
	color: var(--white);
	font-size: 36px;
	cursor: pointer;
	line-height: 1;
	transition: var(--transition);
	z-index: 10;
}

.modal-close:hover {
	color: var(--warning-color);
}

.modal-caption {
	text-align: center;
	color: var(--white);
	padding-top: 14px;
	font-size: 15px;
}

/* ---------- Scroll to Top ---------- */
.scroll-top {
	position: fixed;
	bottom: 32px;
	right: 32px;
	width: 46px;
	height: 46px;
	border-radius: 50%;
	background: var(--primary-color);
	color: var(--white);
	border: none;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: var(--shadow-md);
	opacity: 0;
	visibility: hidden;
	transform: translateY(10px);
	transition: var(--transition);
	z-index: 1500;
}

.scroll-top.show {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

.scroll-top:hover {
	background: var(--primary-dark);
}

/* ---------- 滚动出现动画 ---------- */
.reveal {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
	opacity: 1;
	transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
	.hero-container {
		grid-template-columns: 1fr;
		gap: 48px;
	}

	.hero {
		padding: 130px 0 70px;
	}

	.hero-title, .typewriter {
		font-size: 40px;
	}

	.features-grid, .use-cases-grid, .testimonials-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.showcase-item, .showcase-ai .showcase-item, .showcase-security .showcase-item {
		grid-template-columns: 1fr;
		gap: 36px;
	}

	.workflow-steps {
		flex-wrap: wrap;
		gap: 24px;
	}

	.step {
		flex: 1 1 40%;
	}

	.step-arrow {
		display: none;
	}

	.footer-content {
		grid-template-columns: 1fr 1fr;
	}
}

@media (max-width: 640px) {
	.nav-menu {
		position: fixed;
		top: 72px;
		left: 0;
		right: 0;
		background: var(--white);
		flex-direction: column;
		gap: 0;
		padding: 16px 24px;
		box-shadow: var(--shadow-md);
		transform: translateY(-120%);
		transition: var(--transition);
		opacity: 0;
	}

	.nav-menu.open {
		transform: translateY(0);
		opacity: 1;
	}

	.nav-menu .nav-link {
		padding: 14px 0;
		width: 100%;
		border-bottom: 1px solid var(--border-color);
	}

	.nav-toggle {
		display: flex;
	}

	.hero-title, .typewriter {
		font-size: 32px;
	}

	.hero-subtitle {
		font-size: 16px;
	}

	.hero-stats {
		gap: 24px;
	}

	.stat-number {
		font-size: 20px;
	}

	.features-grid, .use-cases-grid, .testimonials-grid {
		grid-template-columns: 1fr;
	}

	.section-title, .cta-title {
		font-size: 28px;
	}

	.floating-card {
		display: none;
	}

	.hero-buttons, .cta-buttons {
		flex-direction: column;
	}

	.btn {
		width: 100%;
	}

	.footer-content {
		grid-template-columns: 1fr;
		gap: 32px;
	}

	.pricing-card {
		padding: 36px 24px;
	}

	.cta-features {
		flex-direction: column;
		align-items: center;
	}
}