/* 基础变量 */
:root{
	--bg: #0b1020;
	--bg-soft: #0f172a;
	--card: #111827;
	--muted: #94a3b8;
	--text: #e5e7eb;
	--primary: #60a5fa;
	--primary-strong: #3b82f6;
	--accent: #a78bfa;
	--ring: rgba(99,102,241,.35);
	--container: 1120px;
}

*{ box-sizing: border-box; }
html, body{
	margin: 0;
	padding: 0;
	background: linear-gradient(180deg, #070b19 0%, #0b1020 30%, #0b1020 100%);
	color: var(--text);
	font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", "Microsoft YaHei", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
	line-height: 1.6;
}

.container{
	max-width: var(--container);
	margin: 0 auto;
	padding: 0 20px;
}

/* 头部导航 */
.site-header{
	position: sticky;
	top: 0;
	z-index: 50;
	backdrop-filter: saturate(1.2) blur(10px);
	background: rgba(11,16,32,.6);
	border-bottom: 1px solid rgba(148,163,184,.08);
}
.header-inner{
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 14px 0;
}
.brand{
	display: flex;
	align-items: baseline;
	gap: 10px;
}
.logo{
	font-weight: 800;
	letter-spacing: .5px;
	font-size: 20px;
	background: linear-gradient(135deg, var(--primary), var(--accent));
	-webkit-background-clip: text;
	        background-clip: text;
	-webkit-text-fill-color: transparent;
}
.tagline{
	color: var(--muted);
	font-size: 12px;
}
.nav{
	display: flex;
	gap: 18px;
	align-items: center;
}
.nav a{
	color: var(--text);
	text-decoration: none;
	font-size: 14px;
	opacity: .9;
}
.nav a:hover{ opacity: 1; }

/* 按钮 */
.btn{
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	border-radius: 10px;
	text-decoration: none;
	transition: all .2s ease;
	border: 1px solid rgba(148,163,184,.16);
	color: var(--text);
}
.btn-primary{
	background: linear-gradient(135deg, var(--primary), var(--accent));
	border-color: transparent;
	color: #0b1020;
	font-weight: 700;
	box-shadow: 0 10px 30px -10px var(--ring);
}
.btn-ghost{
	background: rgba(148,163,184,.08);
}
.btn:hover{
	transform: translateY(-1px);
}
.btn-large{ padding: 12px 18px; font-size: 15px; }
.btn-small{ padding: 8px 12px; font-size: 13px; }

/* Hero */
.hero{
	position: relative;
	padding: 72px 0 48px;
	overflow: hidden;
}
.hero-bg{
	position: absolute;
	inset: -10% -10% auto -10%;
	height: 60%;
	background: radial-gradient(1000px 500px at 80% 10%, rgba(99,102,241,.15), transparent 60%),
	            radial-gradient(1000px 600px at 20% 0%, rgba(96,165,250,.16), transparent 55%);
	pointer-events: none;
}
.hero-inner{
	display: grid;
	grid-template-columns: 1.1fr .9fr;
	gap: 40px;
	align-items: center;
}
.hero-copy h1{
	font-size: 40px;
	line-height: 1.15;
	margin: 0 0 12px;
}
.lead{
	color: #cbd5e1;
	margin: 0 0 20px;
	font-size: 16px;
}
.cta-row{ display: flex; gap: 12px; margin: 8px 0 14px; }
.hero-points{
	display: grid;
	grid-template-columns: repeat(2, minmax(0,1fr));
	gap: 10px 16px;
	padding: 0;
	margin: 14px 0 0;
	list-style: none;
	color: #c7d2fe;
	font-size: 14px;
}
.hero-media{
	justify-self: end;
}
.phone-mock{
	width: 320px;
	aspect-ratio: 9/19.5;
	border-radius: 24px;
	border: 1px solid rgba(148,163,184,.15);
	box-shadow: 0 20px 60px -25px rgba(0,0,0,.6), 0 8px 24px -12px rgba(99,102,241,.25);
	background: #000;
	object-fit: cover;
}

/* 通用 Section */
.section{
	padding: 56px 0;
}
.section-title{
	font-size: 28px;
	margin: 0 0 24px;
}
.section-intro{
	color: var(--muted);
	margin-top: -8px;
}

/* 功能区 */
.section-features .feature{
	display: grid;
	grid-template-columns: .95fr 1.05fr;
	gap: 26px;
	align-items: center;
	padding: 22px;
	margin-bottom: 18px;
	border-radius: 16px;
	background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
	border: 1px solid rgba(148,163,184,.12);
}
.section-features .feature:nth-child(even) .feature-text{
	order: 2;
}
.feature h3{
	margin: 0 0 10px;
	font-size: 20px;
}
.feature p{ color: #cbd5e1; margin: 0 0 10px; }
.feature ul{ margin: 0; padding-left: 18px; color: #c7d2fe; }
.feature-media img{
	width: 100%;
	border-radius: 14px;
	border: 1px solid rgba(148,163,184,.12);
	box-shadow: 0 14px 38px -18px rgba(0,0,0,.5), 0 6px 18px -10px rgba(96,165,250,.18);
}

/* 价值区 */
.value-grid{
	display: grid;
	grid-template-columns: repeat(4, minmax(0,1fr));
	gap: 16px;
}
.value-card{
	padding: 18px;
	border-radius: 14px;
	background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
	border: 1px solid rgba(148,163,184,.12);
}
.value-card h3{ margin: 0 0 8px; font-size: 18px; }
.value-card p{ margin: 0; color: #cbd5e1; }

/* 画廊 */
.gallery-grid{
	display: grid;
	grid-template-columns: repeat(3, minmax(0,1fr));
	gap: 12px;
}
.gallery-item{
	width: 100%;
	aspect-ratio: 9/19.5;
	object-fit: cover;
	border-radius: 12px;
	border: 1px solid rgba(148,163,184,.12);
	cursor: zoom-in;
	transition: transform .2s ease, box-shadow .2s ease;
	background: #000;
}
.gallery-item:hover{
	transform: translateY(-2px);
	box-shadow: 0 18px 40px -22px rgba(0,0,0,.6), 0 8px 20px -10px rgba(96,165,250,.2);
}

/* FAQ */
.faq-list details{
	border: 1px solid rgba(148,163,184,.12);
	border-radius: 12px;
	padding: 12px 14px;
	background: rgba(255,255,255,.02);
	margin-bottom: 10px;
}
.faq-list summary{
	cursor: pointer;
	font-weight: 600;
}
.faq-list p{
	color: #cbd5e1;
	margin: 8px 0 0;
}

/* 页脚 */
.site-footer{
	border-top: 1px solid rgba(148,163,184,.08);
	background: rgba(11,16,32,.6);
}
.footer-inner{
	display: grid;
	grid-template-columns: 1.1fr .9fr 1fr;
	gap: 16px;
	padding: 20px 0;
	align-items: center;
}
.footer-brand .logo{ font-size: 18px; }
.footer-links{
	display: flex;
	gap: 16px;
	flex-wrap: wrap;
}
.footer-links a{
	color: var(--muted);
	text-decoration: none;
	font-size: 14px;
}
.footer-links a:hover{ color: var(--text); }
.footer-copy{
	text-align: right;
	color: var(--muted);
	font-size: 13px;
}

/* 灯箱 */
.lightbox{
	position: fixed;
	inset: 0;
	background: rgba(5,8,20,.85);
	backdrop-filter: blur(6px);
	display: none;
	align-items: center;
	justify-content: center;
	z-index: 100;
}
.lightbox.show{ display: flex; }
.lightbox-img{
	max-width: min(90vw, 520px);
	max-height: 88vh;
	border-radius: 16px;
	border: 1px solid rgba(148,163,184,.18);
	box-shadow: 0 30px 80px -40px rgba(0,0,0,.8);
	background: #000;
}
.lightbox-close{
	position: absolute;
	top: 18px;
	right: 18px;
	width: 36px;
	height: 36px;
	border-radius: 999px;
	border: 1px solid rgba(148,163,184,.2);
	background: rgba(255,255,255,.06);
	color: #fff;
	font-size: 22px;
	line-height: 1;
	cursor: pointer;
}

/* 响应式 */
@media (max-width: 1000px){
	.hero-inner{
		grid-template-columns: 1fr;
	}
	.hero-media{ justify-self: start; }
	.phone-mock{ width: 280px; }
	.value-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
	.section-features .feature{
		grid-template-columns: 1fr;
	}
	.section-features .feature:nth-child(even) .feature-text{
		order: unset;
	}
}
@media (max-width: 720px){
	.header-inner{ padding: 12px 0; }
	.nav{ gap: 12px; }
	.nav a{ display: none; }
	.nav a.btn{ display: inline-flex; }
	.hero{ padding: 56px 0 32px; }
	.hero-copy h1{ font-size: 30px; }
	.hero-points{ grid-template-columns: 1fr; }
	.value-grid{ grid-template-columns: 1fr; }
	.gallery-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
	.footer-inner{
		grid-template-columns: 1fr;
		text-align: left;
	}
	.footer-copy{ text-align: left; }
}