/* v1.42.10 分站首页落地页：产品介绍 + 右上角弹窗登录。仅 CSS，无 WebGL/外链特效 */
:root {
	--ld-ink: #0f1729;
	--ld-ink-2: #475569;
	--ld-ink-3: #8a97ab;
	--ld-line: #e7ebf3;
	--ld-line-2: #eef1f8;
	--ld-bg: #ffffff;
	--ld-bg-soft: #f6f8fe;
	--ld-primary: #3d5bff;
	--ld-primary-deep: #2b3ff0;
	--ld-primary-soft: #eef1ff;
	--ld-cyan: #1ea0ff;
	--ld-grad: linear-gradient(135deg, #5b2bea 0%, #3d5bff 52%, #1ea0ff 100%);
	--ld-grad-soft: linear-gradient(135deg, rgba(91, 43, 234, 0.08), rgba(30, 160, 255, 0.08));
	--ld-r-sm: 12px;
	--ld-r-md: 16px;
	--ld-r-lg: 22px;
	--ld-r-xl: 28px;
	--ld-r-full: 999px;
	--ld-sh-1: 0 1px 2px rgba(15, 23, 42, 0.05), 0 4px 14px rgba(15, 23, 42, 0.05);
	--ld-sh-2: 0 8px 26px rgba(15, 23, 42, 0.09), 0 3px 8px rgba(15, 23, 42, 0.05);
	--ld-sh-3: 0 24px 60px rgba(30, 44, 120, 0.16), 0 8px 20px rgba(15, 23, 42, 0.08);
	--ld-sh-primary: 0 12px 28px rgba(61, 91, 255, 0.32);
}

body.pro-landing-page {
	margin: 0;
	background: var(--ld-bg);
	color: var(--ld-ink);
	font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
	font-size: 15px;
	line-height: 1.7;
	-webkit-font-smoothing: antialiased;
	overflow-x: hidden;
}

body.pro-landing-page * {
	box-sizing: border-box;
}

.pro-landing-page h1,
.pro-landing-page h2,
.pro-landing-page h3 {
	margin: 0;
	line-height: 1.25;
	letter-spacing: -0.01em;
	font-weight: 800;
}

.pro-landing-page p {
	margin: 0;
}

.ld-muted {
	color: var(--ld-ink-2);
}

/* 背景柔光，纯 CSS 渐变 */
.ld-ambient {
	position: fixed;
	inset: 0;
	z-index: 0;
	pointer-events: none;
	background:
		radial-gradient(560px circle at 82% -6%, rgba(61, 91, 255, 0.12), transparent 60%),
		radial-gradient(520px circle at 6% 2%, rgba(91, 43, 234, 0.08), transparent 55%),
		linear-gradient(180deg, #fbfcff 0%, #ffffff 40%);
}

.ld-page {
	position: relative;
	z-index: 1;
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

.ld-main {
	flex: 1;
	padding-top: 68px;
}

.ld-container {
	width: 100%;
	max-width: 1160px;
	margin: 0 auto;
	padding: 0 20px;
}

.ld-section {
	padding: 56px 0;
}

.ld-section-tight {
	padding-top: 0;
}

/* 顶栏 */
.ld-topbar {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 100;
	height: 68px;
	transition: background 0.28s ease, box-shadow 0.28s ease, backdrop-filter 0.28s ease;
}

.ld-topbar.is-scrolled {
	background: rgba(255, 255, 255, 0.82);
	backdrop-filter: saturate(180%) blur(14px);
	-webkit-backdrop-filter: saturate(180%) blur(14px);
	box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}

.ld-topbar-inner {
	max-width: 1160px;
	height: 100%;
	margin: 0 auto;
	padding: 0 20px;
	display: flex;
	align-items: center;
	gap: 18px;
}

.ld-brand {
	display: inline-flex;
	align-items: center;
	gap: 9px;
	font-size: 17px;
	font-weight: 800;
	color: var(--ld-ink);
	text-decoration: none;
	white-space: nowrap;
}

.ld-brand-logo {
	width: 30px;
	height: 30px;
	border-radius: 9px;
	background: var(--ld-grad);
	display: inline-flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	box-shadow: var(--ld-sh-primary);
}

.ld-brand-logo svg {
	width: 17px;
	height: 17px;
}

.ld-nav {
	display: none;
	align-items: center;
	gap: 2px;
	margin: 0 auto;
}

.ld-nav a {
	padding: 8px 15px;
	border-radius: var(--ld-r-full);
	color: var(--ld-ink-2);
	font-size: 14px;
	font-weight: 500;
	text-decoration: none;
	transition: color 0.18s ease, background 0.18s ease;
}

.ld-nav a:hover {
	color: var(--ld-primary);
	background: var(--ld-primary-soft);
}

/* 按钮 */
.ld-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	min-height: 40px;
	padding: 8px 20px;
	border: 1px solid transparent;
	border-radius: var(--ld-r-full);
	background: var(--ld-primary);
	color: #fff;
	font-size: 14px;
	font-weight: 600;
	line-height: 1;
	cursor: pointer;
	text-decoration: none;
	white-space: nowrap;
	transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, border-color 0.16s ease;
}

.ld-btn:hover {
	color: #fff;
	transform: translateY(-2px);
	background: var(--ld-primary-deep);
	box-shadow: var(--ld-sh-primary);
}

.ld-btn:active {
	transform: translateY(0);
}

.ld-topbar .ld-btn {
	margin-left: auto;
}

.ld-btn-lg {
	min-height: 52px;
	padding: 15px 30px;
	font-size: 16px;
	border-radius: 14px;
}

.ld-btn-grad {
	background: var(--ld-grad);
	box-shadow: var(--ld-sh-primary);
}

.ld-btn-grad:hover {
	background: var(--ld-grad);
	filter: brightness(1.04);
}

.ld-btn-ghost {
	background: #fff;
	color: var(--ld-ink);
	border-color: var(--ld-line);
	box-shadow: var(--ld-sh-1);
}

.ld-btn-ghost:hover {
	color: var(--ld-primary);
	background: #fff;
	border-color: var(--ld-primary);
}

.ld-btn-block {
	width: 100%;
}

/* kicker 小标签 */
.ld-kicker {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	font-size: 12.5px;
	font-weight: 700;
	letter-spacing: 0.02em;
	color: var(--ld-primary-deep);
	background: var(--ld-primary-soft);
	border: 1px solid rgba(61, 91, 255, 0.16);
	padding: 6px 13px;
	border-radius: var(--ld-r-full);
}

.ld-kicker .ld-dot {
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: var(--ld-primary);
	box-shadow: 0 0 0 4px rgba(61, 91, 255, 0.15);
}

/* 区块标题 */
.ld-head {
	max-width: 680px;
	margin: 0 auto 40px;
	text-align: center;
}

.ld-head .ld-kicker {
	margin-bottom: 16px;
}

.ld-head h2 {
	font-size: clamp(1.6rem, 3.4vw, 2.3rem);
	margin-bottom: 14px;
}

.ld-head p {
	color: var(--ld-ink-2);
	font-size: 1.02rem;
}

/* Hero */
.ld-hero {
	display: grid;
	gap: 40px;
	grid-template-columns: 1fr;
	align-items: center;
}

.ld-hero-copy .ld-kicker {
	margin-bottom: 22px;
}

.ld-hero h1 {
	font-size: clamp(2rem, 5.2vw, 3.35rem);
	margin-bottom: 20px;
}

.ld-hero h1 .ld-hl {
	background: var(--ld-grad);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
	color: transparent;
}

.ld-lead {
	font-size: 1.08rem;
	color: var(--ld-ink-2);
	max-width: 540px;
}

.ld-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin: 26px 0;
}

.ld-chip {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	padding: 8px 15px;
	border-radius: var(--ld-r-full);
	background: #fff;
	border: 1px solid var(--ld-line);
	box-shadow: var(--ld-sh-1);
	font-size: 13.5px;
	font-weight: 600;
	color: var(--ld-ink);
}

.ld-chip svg {
	width: 16px;
	height: 16px;
	color: var(--ld-primary);
}

.ld-cta {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
}

/* Hero 右侧控制台预览 */
.ld-preview {
	position: relative;
	background: #fff;
	border: 1px solid var(--ld-line);
	border-radius: var(--ld-r-xl);
	box-shadow: var(--ld-sh-3);
	padding: 18px;
	overflow: hidden;
}

.ld-preview::before {
	content: "";
	position: absolute;
	inset: 0 0 auto 0;
	height: 120px;
	background: var(--ld-grad-soft);
	pointer-events: none;
}

.ld-preview-bar {
	position: relative;
	display: flex;
	align-items: center;
	gap: 8px;
	padding-bottom: 14px;
}

.ld-preview-bar i {
	width: 11px;
	height: 11px;
	border-radius: 50%;
	background: #e2e7f0;
}

.ld-preview-bar i:nth-child(1) { background: #ff6058; }
.ld-preview-bar i:nth-child(2) { background: #ffbe2f; }
.ld-preview-bar i:nth-child(3) { background: #2aca44; }

.ld-preview-bar span {
	margin-left: 6px;
	font-size: 12.5px;
	font-weight: 600;
	color: var(--ld-ink-3);
}

.ld-preview-stats {
	position: relative;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 12px;
	margin-bottom: 14px;
}

.ld-stat {
	background: #fff;
	border: 1px solid var(--ld-line-2);
	border-radius: var(--ld-r-md);
	padding: 14px 16px;
	box-shadow: var(--ld-sh-1);
}

.ld-stat-label {
	font-size: 12.5px;
	color: var(--ld-ink-3);
	margin-bottom: 6px;
}

.ld-stat-value {
	font-size: 1.5rem;
	font-weight: 800;
	letter-spacing: -0.02em;
}

.ld-stat-trend {
	font-size: 12px;
	font-weight: 700;
	color: #12b76a;
}

.ld-preview-list {
	position: relative;
	background: var(--ld-bg-soft);
	border: 1px solid var(--ld-line-2);
	border-radius: var(--ld-r-md);
	padding: 6px 14px;
}

.ld-live-row {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 10px 0;
	font-size: 13.5px;
	border-bottom: 1px dashed var(--ld-line);
}

.ld-live-row:last-child {
	border-bottom: 0;
}

.ld-live-row .ld-live-name {
	font-weight: 600;
}

.ld-live-row .ld-live-tag {
	margin-left: auto;
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 12px;
	font-weight: 700;
}

.ld-live-on { color: #12b76a; }
.ld-live-full { color: #b78103; }

.ld-live-dot {
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: currentColor;
}

/* 信任条 */
.ld-trust {
	display: grid;
	grid-template-columns: 1fr;
	gap: 14px;
	margin-top: 44px;
	padding: 22px;
	background: #fff;
	border: 1px solid var(--ld-line);
	border-radius: var(--ld-r-lg);
	box-shadow: var(--ld-sh-1);
}

.ld-trust-item {
	display: flex;
	align-items: center;
	gap: 14px;
}

.ld-trust-ico {
	width: 42px;
	height: 42px;
	flex-shrink: 0;
	border-radius: 12px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	color: var(--ld-primary);
	background: var(--ld-primary-soft);
}

.ld-trust-ico svg {
	width: 21px;
	height: 21px;
}

.ld-trust-title {
	font-weight: 700;
	font-size: 15px;
}

.ld-trust-sub {
	font-size: 13px;
	color: var(--ld-ink-3);
}

/* 能力卡 */
.ld-bento {
	display: grid;
	gap: 18px;
	grid-template-columns: 1fr;
}

.ld-feat {
	position: relative;
	background: #fff;
	border: 1px solid var(--ld-line);
	border-radius: var(--ld-r-lg);
	padding: 26px;
	box-shadow: var(--ld-sh-1);
	overflow: hidden;
	transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.ld-feat::after {
	content: "";
	position: absolute;
	top: -70px;
	right: -70px;
	width: 170px;
	height: 170px;
	border-radius: 50%;
	background: var(--ld-grad-soft);
	opacity: 0;
	transition: opacity 0.24s ease;
}

.ld-feat:hover {
	transform: translateY(-5px);
	box-shadow: var(--ld-sh-2);
	border-color: rgba(61, 91, 255, 0.28);
}

.ld-feat:hover::after {
	opacity: 1;
}

.ld-feat-ico {
	position: relative;
	width: 48px;
	height: 48px;
	border-radius: 14px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	background: var(--ld-grad);
	box-shadow: var(--ld-sh-primary);
	margin-bottom: 18px;
}

.ld-feat-ico svg {
	width: 24px;
	height: 24px;
}

.ld-feat h3 {
	position: relative;
	font-size: 1.16rem;
	margin-bottom: 10px;
}

.ld-feat p {
	position: relative;
	color: var(--ld-ink-2);
	font-size: 0.95rem;
}

/* 流程 */
.ld-steps {
	display: grid;
	gap: 18px;
	grid-template-columns: 1fr;
	counter-reset: ld-step;
}

.ld-step {
	position: relative;
	background: #fff;
	border: 1px solid var(--ld-line);
	border-radius: var(--ld-r-lg);
	padding: 26px 24px;
	box-shadow: var(--ld-sh-1);
}

.ld-step-num {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	border-radius: 12px;
	background: var(--ld-primary-soft);
	color: var(--ld-primary-deep);
	font-weight: 800;
	font-size: 16px;
	margin-bottom: 16px;
}

.ld-step h3 {
	font-size: 1.1rem;
	margin-bottom: 8px;
}

.ld-step p {
	color: var(--ld-ink-2);
	font-size: 0.95rem;
}

/* FAQ */
.ld-acc {
	max-width: 780px;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.ld-acc-item {
	background: #fff;
	border: 1px solid var(--ld-line);
	border-radius: var(--ld-r-md);
	box-shadow: var(--ld-sh-1);
	overflow: hidden;
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ld-acc-item.is-open {
	border-color: rgba(61, 91, 255, 0.28);
	box-shadow: var(--ld-sh-2);
}

.ld-acc-item button {
	width: 100%;
	min-height: 44px;
	padding: 18px 22px;
	border: 0;
	background: transparent;
	text-align: left;
	font-size: 15.5px;
	font-weight: 700;
	color: var(--ld-ink);
	cursor: pointer;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 12px;
}

.ld-acc-item button .ld-acc-arrow {
	flex-shrink: 0;
	color: var(--ld-ink-3);
	transition: transform 0.24s ease, color 0.24s ease;
}

.ld-acc-item.is-open button .ld-acc-arrow {
	transform: rotate(180deg);
	color: var(--ld-primary);
}

.ld-acc-body {
	max-height: 0;
	overflow: hidden;
	transition: max-height 0.32s ease;
}

.ld-acc-item.is-open .ld-acc-body {
	max-height: 260px;
}

.ld-acc-body p {
	padding: 0 22px 20px;
	color: var(--ld-ink-2);
	font-size: 0.95rem;
}

/* 底部 CTA */
.ld-cta-band {
	position: relative;
	overflow: hidden;
	background: var(--ld-grad);
	border-radius: var(--ld-r-xl);
	padding: 48px 32px;
	text-align: center;
	color: #fff;
	box-shadow: var(--ld-sh-3);
}

.ld-cta-band::before {
	content: "";
	position: absolute;
	top: -80px;
	right: -60px;
	width: 260px;
	height: 260px;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.12);
}

.ld-cta-band::after {
	content: "";
	position: absolute;
	bottom: -90px;
	left: -50px;
	width: 220px;
	height: 220px;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.08);
}

.ld-cta-band h2 {
	position: relative;
	font-size: clamp(1.5rem, 3.4vw, 2.1rem);
	margin-bottom: 12px;
}

.ld-cta-band p {
	position: relative;
	margin: 0 auto 26px;
	max-width: 460px;
	color: rgba(255, 255, 255, 0.9);
	font-size: 1rem;
}

.ld-cta-band .ld-btn {
	position: relative;
	background: #fff;
	color: var(--ld-primary-deep);
}

.ld-cta-band .ld-btn:hover {
	background: #fff;
	color: var(--ld-primary-deep);
	box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
}

/* 页脚 */
.ld-footer {
	margin-top: 56px;
	padding: 30px 20px;
	background: var(--ld-bg-soft);
	border-top: 1px solid var(--ld-line);
}

.ld-footer-inner {
	max-width: 1160px;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	gap: 8px;
	align-items: flex-start;
	color: var(--ld-ink-3);
	font-size: 13px;
}

.ld-footer-brand {
	display: inline-flex;
	align-items: center;
	gap: 9px;
	font-weight: 800;
	font-size: 15px;
	color: var(--ld-ink);
}

/* 登录弹窗 */
.ld-overlay {
	position: fixed;
	inset: 0;
	z-index: 200;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 16px;
	background: rgba(15, 23, 42, 0.48);
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transition: opacity 0.12s ease-out, visibility 0.12s ease-out;
}

.ld-overlay.is-open {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
}

.ld-dialog {
	position: relative;
	width: 100%;
	max-width: 400px;
	max-height: 92vh;
	overflow: auto;
	background: #fff;
	border-radius: var(--ld-r-lg);
	box-shadow: var(--ld-sh-3);
	padding: 34px 26px 26px;
	transform: translateY(6px);
	transition: transform 0.12s ease-out;
}

.ld-overlay.is-open .ld-dialog {
	transform: translateY(0);
}

.ld-dialog-head {
	margin-bottom: 20px;
}

.ld-dialog-head .ld-dialog-title {
	font-size: 1.3rem;
	font-weight: 800;
}

.ld-dialog-head .ld-dialog-sub {
	margin-top: 6px;
	font-size: 13.5px;
	color: var(--ld-ink-3);
}

.ld-dialog-close {
	position: absolute;
	top: 16px;
	right: 16px;
	width: 34px;
	height: 34px;
	border: 0;
	border-radius: 50%;
	background: var(--ld-bg-soft);
	color: var(--ld-ink-3);
	font-size: 15px;
	cursor: pointer;
	transition: background 0.18s ease, color 0.18s ease;
}

.ld-dialog-close:hover {
	background: #eef1f8;
	color: var(--ld-ink);
}

body.pro-landing-page .ld-dialog .pro-login-card {
	width: 100%;
	padding: 0;
}

@media (min-width: 720px) {
	.ld-trust {
		grid-template-columns: repeat(3, 1fr);
	}
	.ld-bento {
		grid-template-columns: repeat(2, 1fr);
	}
	.ld-steps {
		grid-template-columns: repeat(3, 1fr);
	}
	.ld-footer-inner {
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
	}
}

@media (min-width: 960px) {
	.ld-section {
		padding: 76px 0;
	}
	.ld-hero {
		grid-template-columns: 1.05fr 0.95fr;
		gap: 56px;
	}
	.ld-bento {
		grid-template-columns: repeat(4, 1fr);
	}
	.ld-feat {
		padding: 24px 22px;
	}
	.ld-feat h3 {
		font-size: 1.08rem;
	}
	.ld-nav {
		display: flex;
	}
}

@media (prefers-reduced-motion: reduce) {
	.pro-landing-page *,
	.pro-landing-page *::before,
	.pro-landing-page *::after {
		transition-duration: 0.01ms !important;
	}
}