/* ==========================================================================
   华久科技官网主题样式
   设计语言：黑白留白 + 直角硬朗（参考小米/苹果），蓝青色为品牌强调色
   ========================================================================== */

:root {
	--hj-black: #111111;
	--hj-ink: #1d1d1f;
	--hj-gray-900: #1a1a1a;
	--hj-gray-700: #424242;
	--hj-gray-500: #757575;
	--hj-gray-400: #b0b0b0;
	--hj-gray-200: #e6e6e6;
	--hj-gray-100: #f5f5f7;
	--hj-white: #ffffff;

	/* 品牌色：取自华久 logo 的蓝青渐变 */
	--hj-primary: #1a8fc9;
	--hj-primary-dark: #0e6fb8;
	--hj-teal: #26b7bf;
	--hj-gradient: linear-gradient(120deg, #1a8fc9 0%, #26b7bf 100%);

	--hj-max: 1200px;
	--hj-gap: 24px;
	--hj-radius: 0px;
	--hj-header-h: 64px;
	--hj-font: "MiSans", "PingFang SC", "Microsoft YaHei", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	--hj-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
	--hj-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family: var(--hj-font);
	font-size: 16px;
	line-height: 1.7;
	color: var(--hj-ink);
	background: var(--hj-white);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

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

a {
	color: inherit;
	text-decoration: none;
	transition: color var(--hj-transition);
}

h1, h2, h3, h4 {
	font-weight: 600;
	line-height: 1.25;
	margin: 0 0 0.5em;
	color: var(--hj-ink);
}

.screen-reader-text {
	position: absolute !important;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	border: 0;
}

.huajiu-skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	z-index: 999;
	background: var(--hj-ink);
	color: #fff;
	padding: 10px 16px;
}
.huajiu-skip-link:focus {
	left: 8px;
	top: 8px;
}

.huajiu-section__inner,
.huajiu-header__inner,
.huajiu-footer__inner {
	width: 100%;
	max-width: var(--hj-max);
	margin: 0 auto;
	padding-left: 20px;
	padding-right: 20px;
}

.huajiu-section {
	padding: 88px 0;
}

.huajiu-section__head {
	text-align: center;
	margin-bottom: 48px;
}

.huajiu-section__title {
	font-size: 34px;
	letter-spacing: -0.01em;
}

.huajiu-section__desc {
	color: var(--hj-gray-500);
	font-size: 17px;
	margin: 0;
}

.huajiu-section__foot {
	text-align: center;
	margin-top: 44px;
}

.huajiu-empty {
	color: var(--hj-gray-500);
	text-align: center;
	padding: 40px 0;
}

/* ---- 按钮 ---- */
.huajiu-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 13px 30px;
	font-size: 15px;
	font-weight: 500;
	border: 1px solid transparent;
	border-radius: var(--hj-radius);
	cursor: pointer;
	transition: all var(--hj-transition);
	background: none;
	line-height: 1.2;
}

.huajiu-btn--primary {
	background: var(--hj-primary);
	color: #fff;
	border-color: var(--hj-primary);
}
.huajiu-btn--primary:hover {
	background: var(--hj-primary-dark);
	border-color: var(--hj-primary-dark);
}

.huajiu-btn--ghost {
	background: transparent;
	color: var(--hj-ink);
	border-color: var(--hj-gray-400);
}
.huajiu-btn--ghost:hover {
	border-color: var(--hj-ink);
	color: var(--hj-ink);
}

/* ---- 页头 / 导航 ---- */
.huajiu-header {
	position: sticky;
	top: 0;
	z-index: 200;
	background: rgba(255, 255, 255, 0.9);
	backdrop-filter: saturate(180%) blur(20px);
	border-bottom: 1px solid var(--hj-gray-200);
}

.huajiu-header.is-scrolled {
	background: rgba(255, 255, 255, 0.98);
	box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.huajiu-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: var(--hj-header-h);
}

.huajiu-header__brand {
	display: flex;
	align-items: center;
	flex: 0 0 auto;
}
.huajiu-header__brand img {
	max-height: 40px;
	width: auto;
}
.huajiu-logo-text {
	font-size: 20px;
	font-weight: 700;
	letter-spacing: 0.02em;
	color: var(--hj-ink);
}

.huajiu-nav {
	flex: 1 1 auto;
	display: flex;
	justify-content: center;
}
.huajiu-nav__menu {
	display: flex;
	gap: 34px;
	margin: 0;
	padding: 0;
	list-style: none;
}
.huajiu-nav__menu > li > a {
	display: inline-flex;
	align-items: center;
	height: var(--hj-header-h);
	font-size: 15px;
	font-weight: 500;
	color: var(--hj-gray-700);
	position: relative;
}
.huajiu-nav__menu > li > a::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 16px;
	width: 100%;
	height: 2px;
	background: var(--hj-primary);
	transform: scaleX(0);
	transition: transform var(--hj-transition);
}
.huajiu-nav__menu > li > a:hover,
.huajiu-nav__menu > li.current-menu-item > a {
	color: var(--hj-primary);
}
.huajiu-nav__menu > li > a:hover::after,
.huajiu-nav__menu > li.current-menu-item > a::after {
	transform: scaleX(1);
}

.huajiu-header__tools {
	display: flex;
	align-items: center;
	gap: 18px;
	flex: 0 0 auto;
}
.huajiu-lang {
	font-size: 14px;
	color: var(--hj-gray-700);
	cursor: pointer;
	white-space: nowrap;
}
.huajiu-lang:hover {
	color: var(--hj-primary);
}

.huajiu-search-toggle {
	width: 24px;
	height: 24px;
	border: none;
	background: none;
	cursor: pointer;
	padding: 0;
}
.huajiu-search-toggle__icon {
	display: block;
	width: 16px;
	height: 16px;
	border: 2px solid var(--hj-gray-700);
	border-radius: 50%;
	position: relative;
	margin: 0 auto;
}
.huajiu-search-toggle__icon::after {
	content: "";
	position: absolute;
	right: -6px;
	bottom: -4px;
	width: 8px;
	height: 2px;
	background: var(--hj-gray-700);
	transform: rotate(45deg);
}

.huajiu-menu-toggle {
	display: none;
	flex-direction: column;
	justify-content: space-between;
	width: 24px;
	height: 18px;
	background: none;
	border: none;
	cursor: pointer;
	padding: 0;
}
.huajiu-menu-toggle span {
	display: block;
	height: 2px;
	width: 100%;
	background: var(--hj-ink);
	transition: transform var(--hj-transition), opacity var(--hj-transition);
}
.huajiu-menu-toggle.is-active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.huajiu-menu-toggle.is-active span:nth-child(2) { opacity: 0; }
.huajiu-menu-toggle.is-active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.huajiu-searchbar {
	border-top: 1px solid var(--hj-gray-200);
	background: #fff;
}
.huajiu-searchbar__inner {
	max-width: var(--hj-max);
	margin: 0 auto;
	padding: 18px 20px;
}
.huajiu-search-form {
	display: flex;
	gap: 10px;
}
.huajiu-search-form__input {
	flex: 1;
	border: 1px solid var(--hj-gray-200);
	padding: 12px 16px;
	font-size: 15px;
	border-radius: var(--hj-radius);
}
.huajiu-search-form__input:focus {
	outline: none;
	border-color: var(--hj-primary);
}
.huajiu-search-form__submit {
	padding: 12px 26px;
	background: var(--hj-primary);
	color: #fff;
	border: none;
	cursor: pointer;
	border-radius: var(--hj-radius);
}

/* ---- Hero ---- */
.huajiu-hero {
	min-height: 560px;
	display: flex;
	align-items: center;
	justify-content: center;
	text-align: center;
	background: var(--hj-gradient);
	background-size: cover;
	background-position: center;
	color: #fff;
	position: relative;
}
.huajiu-hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background: rgba(0, 0, 0, 0.18);
}
.huajiu-hero__inner {
	position: relative;
	z-index: 1;
	max-width: 760px;
	padding: 0 20px;
}
.huajiu-hero__title {
	color: #fff;
	font-size: 56px;
	letter-spacing: -0.02em;
	margin-bottom: 18px;
}
.huajiu-hero__subtitle {
	font-size: 20px;
	color: rgba(255, 255, 255, 0.92);
	margin: 0 0 34px;
}
.huajiu-hero__actions {
	display: flex;
	gap: 16px;
	justify-content: center;
	flex-wrap: wrap;
}
.huajiu-hero__actions .huajiu-btn--ghost {
	color: #fff;
	border-color: rgba(255, 255, 255, 0.7);
}
.huajiu-hero__actions .huajiu-btn--ghost:hover {
	background: rgba(255, 255, 255, 0.14);
	border-color: #fff;
	color: #fff;
}

/* ---- 栅格 ---- */
.huajiu-grid {
	display: grid;
	gap: var(--hj-gap);
}
.huajiu-grid--products {
	grid-template-columns: repeat(3, 1fr);
}
.huajiu-grid--advantages {
	grid-template-columns: repeat(4, 1fr);
}
.huajiu-grid--posts {
	grid-template-columns: repeat(3, 1fr);
}

/* ---- 产品卡片 ---- */
.huajiu-card {
	display: flex;
	flex-direction: column;
	background: var(--hj-gray-100);
	overflow: hidden;
	transition: transform var(--hj-transition), box-shadow var(--hj-transition);
}
.huajiu-card:hover {
	transform: translateY(-6px);
	box-shadow: var(--hj-shadow);
}
.huajiu-card__media {
	aspect-ratio: 4 / 3;
	overflow: hidden;
	background: #fff;
}
.huajiu-card__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.5s ease;
}
.huajiu-card:hover .huajiu-card__media img {
	transform: scale(1.05);
}
.huajiu-card__placeholder {
	display: block;
	width: 100%;
	height: 100%;
	background: var(--hj-gradient);
	opacity: 0.15;
}
.huajiu-card__body {
	padding: 24px;
}
.huajiu-card__title {
	font-size: 20px;
	margin-bottom: 6px;
}
.huajiu-card__subtitle {
	color: var(--hj-gray-500);
	font-size: 15px;
	margin: 0 0 14px;
}
.huajiu-card__more {
	color: var(--hj-primary);
	font-size: 14px;
	font-weight: 500;
}
.huajiu-card__more::after {
	content: " →";
}

/* ---- 企业优势 ---- */
.huajiu-section--advantages {
	background: var(--hj-gray-100);
}
.huajiu-advantage {
	background: #fff;
	padding: 36px 28px;
}
.huajiu-advantage__index {
	display: block;
	font-size: 28px;
	font-weight: 700;
	color: var(--hj-primary);
	margin-bottom: 14px;
}
.huajiu-advantage__title {
	font-size: 19px;
	margin-bottom: 10px;
}
.huajiu-advantage__desc {
	color: var(--hj-gray-500);
	font-size: 15px;
	margin: 0;
}

/* ---- 页面头部 ---- */
.huajiu-page-head {
	background: var(--hj-gray-100);
	padding: 64px 0 56px;
	text-align: center;
}
.huajiu-page-head__title {
	font-size: 40px;
	margin-bottom: 12px;
}
.huajiu-page-head__desc {
	color: var(--hj-gray-500);
	font-size: 17px;
	margin: 0;
}

/* ---- 产品筛选 ---- */
.huajiu-product-filter {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	margin-bottom: 48px;
}
.huajiu-product-filter__item {
	padding: 9px 22px;
	border: 1px solid var(--hj-gray-200);
	font-size: 15px;
	color: var(--hj-gray-700);
	transition: all var(--hj-transition);
}
.huajiu-product-filter__item:hover {
	border-color: var(--hj-primary);
	color: var(--hj-primary);
}
.huajiu-product-filter__item.is-active {
	background: var(--hj-primary);
	border-color: var(--hj-primary);
	color: #fff;
}

/* ---- 产品详情 ---- */
.huajiu-product__hero {
	padding: 56px 0;
	background: var(--hj-gray-100);
}
.huajiu-product__hero-inner {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 56px;
	align-items: center;
}
.huajiu-product__media img {
	width: 100%;
	object-fit: cover;
}
.huajiu-breadcrumb {
	font-size: 14px;
	color: var(--hj-gray-500);
	margin-bottom: 18px;
	display: flex;
	gap: 8px;
	align-items: center;
}
.huajiu-breadcrumb a:hover {
	color: var(--hj-primary);
}
.huajiu-product__title {
	font-size: 38px;
	margin-bottom: 12px;
}
.huajiu-product__subtitle {
	font-size: 18px;
	color: var(--hj-gray-500);
	margin: 0 0 30px;
}
.huajiu-product__actions {
	display: flex;
	gap: 14px;
	flex-wrap: wrap;
}
.huajiu-product__body {
	display: grid;
	grid-template-columns: 1.6fr 1fr;
	gap: 56px;
	align-items: start;
}
.huajiu-product__section-title {
	font-size: 22px;
	margin: 0 0 18px;
	padding-bottom: 12px;
	border-bottom: 2px solid var(--hj-ink);
}
.huajiu-specs {
	width: 100%;
	border-collapse: collapse;
	margin-bottom: 34px;
	font-size: 15px;
}
.huajiu-specs th,
.huajiu-specs td {
	text-align: left;
	padding: 12px 14px;
	border-bottom: 1px solid var(--hj-gray-200);
}
.huajiu-specs th {
	width: 40%;
	color: var(--hj-gray-500);
	font-weight: 500;
}
.huajiu-scenario {
	list-style: none;
	margin: 0;
	padding: 0;
}
.huajiu-scenario li {
	padding: 10px 0 10px 22px;
	position: relative;
	border-bottom: 1px solid var(--hj-gray-200);
}
.huajiu-scenario li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 18px;
	width: 8px;
	height: 8px;
	background: var(--hj-primary);
}

/* ---- 资料下载列表 ---- */
.huajiu-download-list {
	list-style: none;
	margin: 0;
	padding: 0;
	max-width: 820px;
	margin: 0 auto;
}
.huajiu-download-list__item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
	padding: 22px 24px;
	border: 1px solid var(--hj-gray-200);
	margin-bottom: 14px;
}
.huajiu-download-list__name {
	display: block;
	font-size: 17px;
	font-weight: 500;
}
.huajiu-download-list__meta {
	font-size: 14px;
	color: var(--hj-gray-500);
}

/* ---- 联系我们 ---- */
.huajiu-contact {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 56px;
	align-items: start;
}
.huajiu-contact__form-wrap {
	background: var(--hj-gray-100);
	padding: 36px;
}
.huajiu-contact__form-title {
	font-size: 22px;
	margin-bottom: 8px;
}
.huajiu-contact__form-desc {
	color: var(--hj-gray-500);
	font-size: 15px;
	margin: 0 0 24px;
}
.huajiu-field textarea {
	width: 100%;
	padding: 12px 14px;
	border: 1px solid var(--hj-gray-200);
	font-size: 15px;
	font-family: inherit;
	border-radius: var(--hj-radius);
	resize: vertical;
}
.huajiu-field textarea:focus {
	outline: none;
	border-color: var(--hj-primary);
}
.huajiu-contact-submit {
	width: 100%;
	margin-top: 8px;
}
.huajiu-contact__item {
	padding: 18px 0;
	border-bottom: 1px solid var(--hj-gray-200);
}
.huajiu-contact__label {
	display: block;
	font-size: 14px;
	color: var(--hj-gray-500);
	margin-bottom: 4px;
}
.huajiu-contact__item a:hover {
	color: var(--hj-primary);
}
.huajiu-contact__qr {
	display: flex;
	gap: 30px;
	flex-wrap: wrap;
}
.huajiu-contact__qr-item {
	margin: 0;
	text-align: center;
}
.huajiu-contact__qr-item img {
	width: 150px;
	height: 150px;
	object-fit: cover;
	border: 1px solid var(--hj-gray-200);
}
.huajiu-contact__qr-item figcaption {
	margin-top: 10px;
	font-size: 14px;
	color: var(--hj-gray-500);
}

.huajiu-entry-content {
	font-size: 16px;
	line-height: 1.9;
}
.huajiu-entry-content img { margin: 20px 0; }

/* ---- 页脚 ---- */
.huajiu-footer {
	background: var(--hj-gray-100);
	color: var(--hj-gray-700);
	font-size: 14px;
}
.huajiu-footer__top {
	padding: 56px 0;
	border-bottom: 1px solid var(--hj-gray-200);
}
.huajiu-footer__inner {
	display: flex;
	flex-wrap: wrap;
	gap: 40px;
	justify-content: space-between;
}
.huajiu-footer__brand img { max-height: 44px; margin-bottom: 14px; }
.huajiu-footer__slogan {
	color: var(--hj-gray-500);
	max-width: 280px;
	margin: 0;
}
.huajiu-footer__menu {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 12px;
}
.huajiu-footer__menu a:hover { color: var(--hj-primary); }
.huajiu-footer__contact h4 {
	font-size: 15px;
	margin-bottom: 14px;
}
.huajiu-footer__contact p { margin: 0 0 8px; }
.huajiu-footer__contact a:hover { color: var(--hj-primary); }

.huajiu-footer__bottom {
	padding: 22px 0;
}
.huajiu-footer__bottom .huajiu-footer__inner {
	align-items: center;
	gap: 12px;
}
.huajiu-footer__copyright,
.huajiu-footer__beian {
	margin: 0;
	font-size: 13px;
	color: var(--hj-gray-500);
}
.huajiu-footer__beian {
	display: flex;
	gap: 18px;
	flex-wrap: wrap;
}
.huajiu-footer__beian a:hover { color: var(--hj-primary); }

/* ---- 下载弹窗 ---- */
.huajiu-modal {
	position: fixed;
	inset: 0;
	z-index: 400;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 20px;
}
.huajiu-modal[hidden] {
	display: none;
}
.huajiu-modal__overlay {
	position: absolute;
	inset: 0;
	background: rgba(0, 0, 0, 0.55);
	animation: hj-fade 0.25s ease;
}
.huajiu-modal__dialog {
	position: relative;
	background: #fff;
	width: 100%;
	max-width: 440px;
	padding: 40px;
	z-index: 1;
	animation: hj-pop 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.huajiu-modal__close {
	position: absolute;
	top: 14px;
	right: 16px;
	font-size: 28px;
	line-height: 1;
	background: none;
	border: none;
	cursor: pointer;
	color: var(--hj-gray-500);
}
.huajiu-modal__title {
	font-size: 24px;
	margin-bottom: 8px;
}
.huajiu-modal__desc {
	color: var(--hj-gray-500);
	margin: 0 0 24px;
	font-size: 15px;
}
.huajiu-field {
	margin-bottom: 16px;
}
.huajiu-field label {
	display: block;
	font-size: 14px;
	margin-bottom: 6px;
	color: var(--hj-gray-700);
}
.huajiu-field .req {
	color: #e0393e;
	margin-left: 2px;
}
.huajiu-field input {
	width: 100%;
	padding: 12px 14px;
	border: 1px solid var(--hj-gray-200);
	font-size: 15px;
	border-radius: var(--hj-radius);
}
.huajiu-field input:focus {
	outline: none;
	border-color: var(--hj-primary);
}
.huajiu-download-submit {
	width: 100%;
	margin-top: 8px;
}
.huajiu-form-message {
	min-height: 20px;
	font-size: 14px;
	margin: 0 0 10px;
}
.huajiu-form-message.is-error { color: #e0393e; }
.huajiu-form-message.is-success { color: #1a8f4c; }

@keyframes hj-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes hj-pop { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ---- 分页 ---- */
.pagination,
.nav-links {
	display: flex;
	gap: 8px;
	justify-content: center;
	margin-top: 48px;
	flex-wrap: wrap;
}
.nav-links .page-numbers {
	padding: 8px 14px;
	border: 1px solid var(--hj-gray-200);
	color: var(--hj-gray-700);
}
.nav-links .page-numbers.current,
.nav-links .page-numbers:hover {
	background: var(--hj-primary);
	border-color: var(--hj-primary);
	color: #fff;
}

/* ---- 搜索结果 ---- */
.huajiu-search-results {
	list-style: none;
	margin: 0;
	padding: 0;
	max-width: 780px;
}
.huajiu-search-result {
	padding: 24px 0;
	border-bottom: 1px solid var(--hj-gray-200);
}
.huajiu-search-result h2 {
	font-size: 20px;
	margin-bottom: 6px;
}
.huajiu-search-result a:hover h2 { color: var(--hj-primary); }
.huajiu-search-result p {
	color: var(--hj-gray-500);
	margin: 0;
}

.huajiu-404 { text-align: center; }
.huajiu-404 p { margin-bottom: 24px; color: var(--hj-gray-500); }

/* ---- 响应式 ---- */
@media (max-width: 900px) {
	.huajiu-grid--products,
	.huajiu-grid--posts { grid-template-columns: repeat(2, 1fr); }
	.huajiu-grid--advantages { grid-template-columns: repeat(2, 1fr); }
	.huajiu-product__hero-inner,
	.huajiu-product__body,
	.huajiu-contact { grid-template-columns: 1fr; gap: 32px; }
	.huajiu-section { padding: 60px 0; }
	.huajiu-hero__title { font-size: 40px; }
	.huajiu-section__title { font-size: 28px; }

	.huajiu-menu-toggle { display: flex; }
	.huajiu-nav {
		position: fixed;
		top: var(--hj-header-h);
		left: 0;
		right: 0;
		bottom: 0;
		background: #fff;
		flex-direction: column;
		justify-content: flex-start;
		padding: 20px;
		transform: translateX(100%);
		transition: transform var(--hj-transition);
		overflow-y: auto;
	}
	.huajiu-nav.is-open { transform: translateX(0); }
	.huajiu-nav__menu {
		flex-direction: column;
		gap: 0;
		width: 100%;
	}
	.huajiu-nav__menu > li > a {
		height: auto;
		padding: 16px 0;
		width: 100%;
		border-bottom: 1px solid var(--hj-gray-200);
		font-size: 17px;
	}
	.huajiu-nav__menu > li > a::after { display: none; }
	.huajiu-footer__inner { flex-direction: column; gap: 28px; }
}

@media (max-width: 560px) {
	.huajiu-grid--products,
	.huajiu-grid--posts,
	.huajiu-grid--advantages { grid-template-columns: 1fr; }
	.huajiu-hero__title { font-size: 32px; }
	.huajiu-hero { min-height: 460px; }
	.huajiu-page-head__title { font-size: 30px; }
	.huajiu-modal__dialog { padding: 28px 22px; }
	.huajiu-download-list__item { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
	* { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}