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

:root {
	--bg-dark: #0A1E15;
	--bg-dark-2: #0D261A;
	--bg-deep: #081711;
	--green: #1E7A52;
	--green-bright: #3FA873;
	--orange: #F07C1F;
	--paper: #F2F4EC;
	--paper-2: #ECEFE3;
	--ink-dark: #0B1F16;
	--ink-light: #EAF3EB;
	--serif: "Noto Serif SC", "Songti SC", serif;
	--sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
	--mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: var(--sans);
	background: var(--bg-dark);

	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

a {
	color: inherit;
}

.container {
	max-width: 1160px;
	margin: 0 auto;
	padding: 0 48px;
}

section.sec {
	position: relative;
	padding: 128px 0;
	scroll-margin-top: 72px;
}

/* 深浅区块变量 */
.sec-dark {
	--fg: var(--ink-light);
	--mute: rgba(234, 243, 235, 0.68);
	--line: rgba(234, 243, 235, 0.16);
	--card: var(--bg-dark-2);
	background: var(--bg-dark);
	color: var(--fg);
}

.sec-light {
	--fg: var(--ink-dark);
	--mute: rgba(11, 31, 22, 0.66);
	--line: rgba(11, 31, 22, 0.16);
	--card: #FFFFFF;
	background: var(--paper);
	color: var(--fg);
}

/* 深色区的工程网格底纹 */
.sec-dark::before {
	content: "";
	position: absolute;
	inset: 0;
	background-image:
		linear-gradient(rgba(234, 243, 235, 0.04) 1px, transparent 1px),
		linear-gradient(90deg, rgba(234, 243, 235, 0.04) 1px, transparent 1px);
	background-size: 76px 76px;
	pointer-events: none;
}

.sec>.container {
	position: relative;
	z-index: 1;
}

/* ============ 通用排版 ============ */
.eyebrow {
	display: flex;
	align-items: center;
	gap: 12px;
	font-family: var(--mono);
	font-size: 12px;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--orange);
	margin-bottom: 26px;
}

.eyebrow::before {
	content: "";
	width: 30px;
	height: 1px;
	background: var(--orange);
	flex: none;
}

.section-title {
	font-family: var(--serif);
	font-weight: 900;
	font-size: clamp(34px, 4.6vw, 56px);
	line-height: 1.18;
	letter-spacing: 0.01em;
	text-wrap: balance;
}

.section-lead {
	max-width: 720px;
	margin-top: 28px;
	font-size: 17px;
	line-height: 1.95;
	color: var(--mute);
}

.arrow-link {
	font-family: var(--mono);
	font-size: 13px;
	letter-spacing: 0.06em;
	text-decoration: none;
	padding-bottom: 3px;
	border-bottom: 1px solid var(--orange);
	transition: color 0.25s ease;
	white-space: nowrap;
}

.arrow-link:hover {
	color: var(--orange);
}

/* 神经线流动 */
@keyframes dashflow {
	to {
		stroke-dashoffset: -64;
	}
}

.flow {
	stroke-dasharray: 6 10;
	animation: dashflow 1.8s linear infinite;
}

/* ============ 导航 ============ */
.nav {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 50;
	background: rgba(10, 30, 21, 0.86);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid rgba(234, 243, 235, 0.1);
}

.nav-inner {
	max-width: 1160px;
	margin: 0 auto;
	padding: 0 48px;
	height: 64px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
}

.nav-brand {
	display: flex;
	align-items: center;
	gap: 12px;
	text-decoration: none;
}

.nav-brand-mark {
	display: flex;
	align-items: center;
}

.nav-brand-text {
	font-family: var(--mono);
	font-weight: 500;
	font-size: 16px;
	letter-spacing: 0.04em;
	color: var(--ink-light);
	display: flex;
	align-items: baseline;
	gap: 10px;
}

.nav-brand-sub {
	font-family: var(--sans);
	font-size: 13px;
	font-weight: 500;
	color: rgba(234, 243, 235, 0.66);
}

.nav-links {
	display: flex;
	align-items: center;
	gap: 28px;
}

.nav-links a {
	font-size: 13.5px;
	color: rgba(234, 243, 235, 0.78);
	text-decoration: none;
	transition: color 0.25s ease;
}

.nav-links a:hover {
	color: #FFFFFF;
}

.nav-links .nav-current {
	color: var(--orange);
	font-weight: 500;
	border-bottom: 1px solid var(--orange);
	padding-bottom: 2px;
}

/* ============ 左侧神经线导航 ============ */
.spine {
	position: fixed;
	left: 30px;
	top: 50%;
	transform: translateY(-50%);
	height: 56vh;
	z-index: 40;
	display: none;
}

.spine-track {
	position: absolute;
	left: 3.5px;
	top: 0;
	bottom: 0;
	width: 1px;
	background: rgba(234, 243, 235, 0.18);
}

.spine-fill {
	position: absolute;
	left: -0.5px;
	top: 0;
	width: 2px;
	height: 0;
	background: var(--orange);
	transition: height 0.15s linear;
}

.spine-nodes {
	position: absolute;
	inset: 0;
	display: flex;
	flex-direction: column;
	justify-content: space-between;
}

.spine-node {
	display: flex;
	align-items: center;
	gap: 12px;
	text-decoration: none;
}

.spine-node .dot {
	width: 8px;
	height: 8px;
	border-radius: 50%;
	border: 1px solid rgba(234, 243, 235, 0.5);
	background: var(--bg-dark);
	flex: none;
	transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.spine-node .lbl {
	font-family: var(--mono);
	font-size: 11px;
	letter-spacing: 0.12em;
	color: rgba(234, 243, 235, 0.42);
	transition: color 0.3s ease;
	white-space: nowrap;
}

.spine-node:hover .lbl {
	color: rgba(234, 243, 235, 0.85);
}

.spine-node.active .dot {
	background: var(--orange);
	border-color: var(--orange);
	box-shadow: 0 0 0 4px rgba(240, 124, 31, 0.18);
}

.spine-node.active .lbl {
	color: var(--orange);
}

@media (min-width: 1360px) {
	.spine {
		display: block;
	}
}

/* ============ 首屏 ============ */
.sec-hero {
	min-height: 100vh;
	display: flex;
	align-items: center;
	padding: 150px 0 110px;
}

.hero-grid {
	display: grid;
	grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
	gap: 64px;
	align-items: center;
	width: 100%;
}

.hero-title {
	font-family: var(--serif);
	font-weight: 900;
	font-size: clamp(42px, 5.8vw, 84px);
	line-height: 1.22;
	letter-spacing: 0.01em;
	text-wrap: balance;
}

.hero-sub {
	margin-top: 30px;
	max-width: 560px;
	font-size: 16.5px;
	line-height: 2.0;
	color: var(--mute);
}

.hero-links {
	display: flex;
	gap: 36px;
	margin-top: 38px;
	flex-wrap: wrap;
}

/* 首屏：单列排版，留白克制 */
.hero-spacer {
	display: none;
}

.hero-grid {
	grid-template-columns: minmax(0, 1fr);
	max-width: 820px;
}

.hero-sub {
	max-width: 720px;
}

/* ============ 集团背景 ============ */
.qual-list {
	margin-top: 64px;
}

.qual-row {
	display: grid;
	grid-template-columns: 220px 1fr 32px;
	align-items: center;
	gap: 24px;
	padding: 28px 0;
	border-top: 1px solid var(--line);
}

.qual-list .qual-row:last-child {
	border-bottom: 1px solid var(--line);
}

.qual-tag {
	font-family: var(--mono);
	font-size: 11.5px;
	letter-spacing: 0.14em;
	color: var(--green);
}

.qual-name {
	font-family: var(--serif);
	font-weight: 600;
	font-size: clamp(22px, 2.8vw, 34px);
	letter-spacing: 0.02em;
}

.qual-glyph {
	color: var(--green);
	display: flex;
}

.footprint {
	margin-top: 80px;
}

.footprint-label {
	font-family: var(--mono);
	font-size: 12px;
	letter-spacing: 0.2em;
	color: var(--mute);
	margin-bottom: 34px;
}

.footprint-line {
	position: relative;
	display: flex;
	justify-content: space-between;
	gap: 24px;
	padding-top: 14px;
}

.footprint-line::before {
	content: "";
	position: absolute;
	top: 20px;
	left: 8px;
	right: 8px;
	height: 1px;
	background: repeating-linear-gradient(90deg, var(--green) 0 6px, transparent 6px 12px);
	opacity: 0.5;
}

.fp-node {
	position: relative;
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.fp-dot {
	position: relative;
	width: 13px;
	height: 13px;
	border-radius: 50%;
	border: 2px solid var(--green);
	background: var(--paper);
	margin-bottom: 8px;
}

.fp-node-mfg .fp-dot {
	border-color: var(--orange);
}

.fp-city {
	font-family: var(--serif);
	font-weight: 900;
	font-size: 26px;
	letter-spacing: 0.06em;
}

.fp-role {
	font-family: var(--mono);
	font-size: 11.5px;
	letter-spacing: 0.12em;
	color: var(--mute);
}

.group-link {
	margin-top: 64px;
	font-size: 15px;
	color: var(--mute);
	display: flex;
	gap: 12px;
	flex-wrap: wrap;
	align-items: baseline;
}

/* 股东滚动带 */
.shareholders {
	margin-top: 96px;
	background: var(--bg-dark);
	border-top: 1px solid rgba(234, 243, 235, 0.1);
	border-bottom: 1px solid rgba(234, 243, 235, 0.1);
	padding: 30px 0;
	overflow: hidden;
}

.sh-label {
	font-family: var(--mono);
	font-size: 11px;
	letter-spacing: 0.22em;
	color: var(--orange);
	text-align: center;
	margin-bottom: 20px;
}

.marquee {
	overflow: hidden;
}

.marquee-track {
	display: flex;
	align-items: baseline;
	gap: 40px;
	width: max-content;
	animation: scrollx 44s linear infinite;
}

.marquee:hover .marquee-track {
	animation-play-state: paused;
}

@keyframes scrollx {
	to {
		transform: translateX(-50%);
	}
}

.sh-item {
	font-family: var(--serif);
	font-weight: 600;
	font-size: 21px;
	letter-spacing: 0.08em;
	color: rgba(234, 243, 235, 0.82);
	white-space: nowrap;
}

.sh-sep {
	color: rgba(240, 124, 31, 0.55);
	font-size: 16px;
}

/* ============ 一体两翼 ============ */
.sec-arch {
	background: var(--bg-dark);
}

.arch-diagram {
	margin-top: 80px;
}

.arch-root {
	text-align: center;
}

.arch-root-pill {
	display: inline-block;
	font-family: var(--serif);
	font-weight: 900;
	font-size: 22px;
	letter-spacing: 0.1em;
	padding: 14px 34px;
	border: 1px solid rgba(63, 168, 115, 0.6);
	background: rgba(30, 122, 82, 0.12);
}

.arch-root-tag {
	display: block;
	margin-top: 14px;
	font-family: var(--mono);
	font-size: 11px;
	letter-spacing: 0.22em;
	color: var(--mute);
}

.arch-links {
	display: block;
	width: 100%;
	height: 88px;
}

.arch-wings {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 28px;
}

.wing-card {
	position: relative;
	border: 1px solid var(--line);
	background: var(--card);
	padding: 40px 38px 36px;
	display: flex;
	flex-direction: column;
	gap: 16px;
	align-items: flex-start;
}

.wing-card-self {
	border-color: rgba(240, 124, 31, 0.55);
	background: rgba(240, 124, 31, 0.05);
}

.wing-corner {
	position: absolute;
	top: 16px;
	right: 18px;
	font-family: var(--mono);
	font-size: 10.5px;
	letter-spacing: 0.2em;
	color: var(--mute);
}

.wing-card-self .wing-corner {
	color: var(--orange);
}

.wing-icon {
	margin-bottom: 6px;
}

.wing-name {
	font-family: var(--serif);
	font-weight: 900;
	font-size: 24px;
	letter-spacing: 0.02em;
}

.wing-role {
	font-family: var(--mono);
	font-size: 12px;
	letter-spacing: 0.2em;
	color: var(--green-bright);
}

.wing-card-self .wing-role {
	color: var(--orange);
}

.wing-desc {
	font-size: 15px;
	line-height: 1.95;
	color: var(--mute);
}

.wing-card .arrow-link {
	margin-top: 10px;
}

.arch-nerve {
	position: relative;
	margin-top: 4px;
}

.arch-nerve svg {
	display: block;
	width: 100%;
	height: 84px;
}

.nerve-label {
	position: absolute;
	left: 50%;
	bottom: -6px;
	transform: translateX(-50%);
	font-family: var(--mono);
	font-size: 11px;
	letter-spacing: 0.3em;
	color: var(--orange);
	background: var(--bg-dark);
	padding: 0 16px;
}

.arch-quote {
	margin-top: 88px;
	text-align: center;
	font-family: var(--serif);
	font-weight: 600;
	font-size: clamp(22px, 3vw, 32px);
	letter-spacing: 0.06em;
}

.arch-quote em {
	font-style: normal;
	color: var(--orange);
}

/* ============ 大鹏 3D ============ */
.sec-3d {
	background: var(--paper-2);
}

.d3-list {
	margin-top: 72px;
	display: flex;
	flex-direction: column;
}

.d3-row {
	display: grid;
	grid-template-columns: 190px 1fr;
	gap: 44px;
	align-items: center;
	padding: 34px 0;
	border-top: 1px solid var(--line);
}

.d3-list .d3-row:last-child {
	border-bottom: 1px solid var(--line);
}

.d3-row-2 {
	margin-left: 9%;
}

.d3-row-3 {
	margin-left: 18%;
}

.big-d {
	font-family: var(--serif);
	font-weight: 900;
	font-size: 150px;
	line-height: 0.9;
	color: transparent;
	-webkit-text-stroke: 2px var(--green);
	transition: color 0.4s ease, -webkit-text-stroke-color 0.4s ease;
}

.d3-row:hover .big-d {
	color: var(--orange);
	-webkit-text-stroke-color: var(--orange);
}

.d3-word {
	font-family: var(--serif);
	font-weight: 900;
	font-size: clamp(24px, 2.6vw, 32px);
	letter-spacing: 0.04em;
}

.d3-copy {
	margin-top: 12px;
	font-size: 16px;
	line-height: 1.9;
	color: var(--mute);
	max-width: 520px;
}

.d3-products {
	margin-top: 20px;
	display: flex;
	gap: 14px;
	flex-wrap: wrap;
}

.chip {
	font-family: var(--mono);
	font-size: 12.5px;
	letter-spacing: 0.06em;
	text-decoration: none;
	padding: 8px 16px;
	border: 1px solid rgba(30, 122, 82, 0.5);
	color: var(--green);
	border-radius: 2px;
	transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

a.chip:hover {
	background: var(--green);
	color: #FFFFFF;
	border-color: var(--green);
}

.chip-plain {
	border-color: var(--line);
	color: var(--mute);
}

/* ============ 收尾 ============ */
.sec-ending {
	background: var(--bg-deep);
}

.vision-block {
	margin-top: 96px;
	max-width: 920px;
	margin-left: auto;
	margin-right: auto;
	display: flex;
	flex-direction: column;
}

.vision-item {
	display: grid;
	grid-template-columns: 88px 1fr;
	gap: 28px;
	padding: 28px 0;
	border-top: 1px solid var(--line);
	align-items: baseline;
}

.vision-item:last-child {
	border-bottom: 1px solid var(--line);
}

.vision-k {
	font-family: var(--serif);
	font-weight: 600;
	font-size: 19px;
	letter-spacing: 0.2em;
	color: var(--green-bright);
}

.vision-v {
	font-size: 16px;
	line-height: 1.95;
	color: var(--mute);
}

.vision-slogan {
	font-family: var(--serif);
	font-weight: 900;
	font-size: clamp(22px, 2.6vw, 30px);
	letter-spacing: 0.05em;
	color: var(--fg);
}

/* 联系我们容器：内敛卡片，包裹双二维码 */
.contact-box {
	margin-top: 96px;
	border: 1px solid var(--line);
	background: rgba(13, 38, 26, 0.5);
	padding: 36px 48px 40px;
	max-width: 560px;
	margin-left: auto;
	margin-right: auto;
	text-align: center;
}

.contact-label {
	font-family: var(--mono);
	font-size: 11.5px;
	letter-spacing: 0.24em;
	color: var(--green-bright);
	margin-bottom: 28px;
}

/* 二维码：低调水平并排 */
.qr-block {
	display: flex;
	justify-content: center;
	gap: 72px;
}

.qr-item {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 12px;
}

.qr-item img {
	width: 96px;
	height: 96px;
	object-fit: contain;
	display: block;
	background: #FFFFFF;
	padding: 5px;
	border: 1px solid var(--line);
	border-radius: 2px;
	opacity: 0.92;
}

.qr-item figcaption {
	font-family: var(--mono);
	font-size: 11px;
	letter-spacing: 0.18em;
	color: rgba(234, 243, 235, 0.45);
}

.ending-head {
	text-align: center;
	max-width: 780px;
	margin: 0 auto;
}

.ending-head .eyebrow {
	justify-content: center;
}

.ending-lead {
	margin-left: auto;
	margin-right: auto;
}

.ending-quote {
	font-family: var(--serif);
	font-weight: 900;
	font-size: clamp(36px, 5vw, 64px);
	line-height: 1.35;
	letter-spacing: 0.04em;
	text-wrap: balance;
}


/* ============ 页脚 ============ */
.footer {
	border-top: 1px solid rgba(234, 243, 235, 0.1);
	background: var(--bg-deep);
	padding: 34px 0;
}

.footer-inner {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 16px;
	flex-wrap: wrap;
}

.footer-brand {
	font-family: var(--mono);
	font-size: 12.5px;
	letter-spacing: 0.1em;
	color: rgba(234, 243, 235, 0.8);
}

.footer-copy {
	font-size: 12.5px;
	color: rgba(234, 243, 235, 0.45);
}

/* ============ 进场动画 ============ */
.reveal {
	opacity: 0;
	transform: translateY(26px);
	transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.in {
	opacity: 1;
	transform: none;
}

.d1 {
	transition-delay: 0.08s;
}

.d2 {
	transition-delay: 0.16s;
}

.d3 {
	transition-delay: 0.24s;
}

.d4 {
	transition-delay: 0.32s;
}

/* ============ 响应式 ============ */
@media (max-width: 1023px) {
	.hero-grid {
		grid-template-columns: 1fr;
		gap: 48px;
	}
}

@media (max-width: 860px) {
	.nav-links {
		display: none;
	}

	.container,
	.nav-inner {
		padding: 0 24px;
	}

	section.sec {
		padding: 88px 0;
	}

	.sec-hero {
		padding: 120px 0 80px;
	}

	.arch-wings {
		grid-template-columns: 1fr;
	}

	.qual-row {
		grid-template-columns: 1fr 32px;
	}

	.qual-tag {
		grid-column: 1 / -1;
	}

	.d3-row {
		grid-template-columns: 1fr;
		gap: 8px;
	}

	.d3-row-2,
	.d3-row-3 {
		margin-left: 0;
	}

	.big-d {
		font-size: 110px;
	}

	.footprint-line {
		flex-direction: column;
		gap: 34px;
	}

	.footprint-line::before {
		display: none;
	}

	.vision-item {
		grid-template-columns: 72px 1fr;
		gap: 18px;
	}

	.qr-block {
		gap: 40px;
	}
}

/* ============ 动效偏好 ============ */
@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	.reveal {
		opacity: 1;
		transform: none;
		transition: none;
	}

	.flow,
	.marquee-track {
		animation: none;
	}

	.spine-fill {
		transition: none;
	}
}