/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-red: #c8161d;
    --color-red-dark: #a81218;
    --color-nav-submenu: #444142;
    --color-blue: #0096d6;
    --color-text: #333;
    --color-text-light: #666;
    --color-text-muted: #999;
    --color-border: #e5e5e5;
    --color-bg-grey: #f5f5f5;
    --color-bg-light: #fafafa;
    --container-width: 1200px;
}

html {
    font-size: 14px;
    overflow-x: hidden;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--color-text);
    background: #fff;
    line-height: 1.6;
    overflow-x: hidden;
    min-width: 0;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== Header ===== */
.site-header {
    position: relative;
    z-index: 1000;
    background: #fff;
    border-top: 2px solid #2a2a2a;
}

.header-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: auto;
    min-height: 56px;
    padding: 8px 0;
}

.logo {
    order: 1;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    padding-right: 12px;
}

.main-nav {
    order: 2;
}

.header-tools {
    order: 3;
}

.logo--image {
    overflow: visible;
    height: auto;
}

.logo-img {
    display: block;
    height: auto;
    object-fit: contain;
    object-position: left center;
}

.site-header:not(.site-header--home) .header-inner {
    min-height: 80px;
    padding: 10px 0;
}

.logo--site .logo-img {
    width: 300px;
    max-width: 54vw;
}

.logo--home .logo-img {
    width: 280px;
    max-width: 52vw;
}

.main-nav {
    display: flex;
    align-items: stretch;
    flex: 1;
    justify-content: flex-end;
    min-width: 0;
}

.nav-list {
    display: flex;
    align-items: stretch;
    height: 100%;
}

.nav-item {
    position: static;
}

@media (min-width: 993px) {
    .nav-item.has-children {
        position: relative;
    }

    .nav-submenu {
        left: 0;
        top: 100%;
    }
}

.nav-link {
    position: relative;
    display: flex;
    align-items: center;
    height: 56px;
    padding: 0 16px;
    font-size: 14px;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    isolation: isolate;
    transition: color 0.28s ease 0.06s;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-red);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.nav-item:hover > .nav-link::before,
.nav-item.is-active > .nav-link::before,
.nav-link.active::before {
    transform: scaleX(1);
}

.nav-item:hover > .nav-link,
.nav-item.is-active > .nav-link,
.nav-link.active {
    color: #fff;
}

/* 子菜单：左边缘与当前悬停的主菜单对齐，向右铺满 */
.nav-submenu {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    width: auto;
    background: var(--color-nav-submenu);
    border: none;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition:
        opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
        visibility 0s linear 0.28s;
}

.nav-item.has-children:hover .nav-submenu,
.nav-item.has-children.is-submenu-open .nav-submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    transition:
        opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
        visibility 0s;
}

.nav-submenu-inner {
    padding: 0 15px 0 0;
}

.nav-submenu-list {
    display: flex;
    align-items: center;
    height: 48px;
    /* 左内边距与主菜单 .nav-link 一致，由 JS 同步 */
    padding-left: 16px;
}

.nav-submenu-link {
    display: block;
    padding: 0 22px;
    font-size: 14px;
    color: #fff;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(8px);
    transition:
        opacity 0.22s ease,
        transform 0.22s ease,
        color 0.2s ease;
}

.nav-item.has-children:hover .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-link {
    opacity: 1;
    transform: translateY(0);
}

.nav-item.has-children:hover .nav-submenu-list li:nth-child(1) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(1) .nav-submenu-link { transition-delay: 0.06s; }
.nav-item.has-children:hover .nav-submenu-list li:nth-child(2) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(2) .nav-submenu-link { transition-delay: 0.1s; }
.nav-item.has-children:hover .nav-submenu-list li:nth-child(3) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(3) .nav-submenu-link { transition-delay: 0.14s; }
.nav-item.has-children:hover .nav-submenu-list li:nth-child(4) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(4) .nav-submenu-link { transition-delay: 0.18s; }
.nav-item.has-children:hover .nav-submenu-list li:nth-child(5) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(5) .nav-submenu-link { transition-delay: 0.22s; }
.nav-item.has-children:hover .nav-submenu-list li:nth-child(6) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(6) .nav-submenu-link { transition-delay: 0.26s; }
.nav-item.has-children:hover .nav-submenu-list li:nth-child(n+7) .nav-submenu-link,
.nav-item.has-children.is-submenu-open .nav-submenu-list li:nth-child(n+7) .nav-submenu-link { transition-delay: 0.3s; }

.nav-submenu-link:first-child {
    padding-left: 0;
}

.nav-submenu-link:hover,
.nav-submenu-link.active {
    color: #fff;
    opacity: 0.88;
}

@media (prefers-reduced-motion: reduce) {
    .nav-link::before,
    .nav-submenu,
    .nav-submenu-link {
        transition: none;
    }

    .nav-submenu {
        transform: none;
    }

    .nav-submenu-link {
        opacity: 1;
        transform: none;
    }
}

.header-tools {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 52px;
    height: 44px;
    padding: 6px 4px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: inherit;
}

.menu-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
    transition: transform 0.2s, opacity 0.2s;
}

.menu-toggle-text {
    font-size: 9px;
    letter-spacing: 0.08em;
    line-height: 1;
}

.menu-toggle.is-active .menu-toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-active .menu-toggle-bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-active .menu-toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.search-btn {
    flex-shrink: 0;
    width: 52px;
    height: 56px;
    background: #f0f0f0;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background 0.2s;
}

.search-btn:hover {
    color: var(--color-red);
    background: #e8e8e8;
}

/* ===== Page Banner ===== */
.page-banner {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.banner-image {
    width: 100%;
    max-width: 1920px;
    height: 280px;
    margin: 0 auto;
    overflow: hidden;
}

.banner-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.banner-info {
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
    background: var(--color-bg-grey);
    border-bottom: 1px solid var(--color-border);
}

.banner-info-inner {
    align-items: center;
    padding-top: 20px;
    padding-bottom: 20px;
    min-height: 80px;
}

.banner-text {
    flex: 1;
    min-width: 0;
}

.banner-info-aside {
    flex: 0 0 auto;
    width: auto;
    min-width: 280px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.banner-title {
    font-size: 28px;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 6px;
}

.banner-title-img {
    display: block;
    height: auto;
    max-height: 72px;
    width: auto;
    max-width: 100%;
}

.banner-slogan {
    font-size: 13px;
}

.slogan-brand {
    color: var(--color-red);
    font-weight: bold;
    margin-right: 8px;
}

.slogan-text {
    color: var(--color-blue);
}

.banner-tabs {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 0;
}

.banner-tab {
    display: inline-block;
    padding: 10px 28px;
    font-size: 14px;
    color: var(--color-text-light);
    background: #fff;
    border: 1px solid #ccc;
    white-space: nowrap;
    writing-mode: horizontal-tb;
    transition: all 0.2s;
}

.banner-tab + .banner-tab {
    border-left: none;
}

.banner-tab:hover {
    color: var(--color-red);
    border-color: var(--color-red);
}

.banner-tab.active {
    color: #fff;
    background: #555;
    border-color: #555;
}

.banner-tabs--dark .banner-tab {
    color: #fff;
    background: #595757;
    border-color: #595757;
}

.banner-tabs--dark .banner-tab:hover {
    color: #fff;
    background: #4a4a4a;
    border-color: #4a4a4a;
}

.banner-tabs--dark .banner-tab.active {
    color: #fff;
    background: #3e3a39;
    border-color: #3e3a39;
}

/* ===== Main Content Layout ===== */
.main-content {
    padding: 25px 0 50px;
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
    background-color: #f8f8f8;
    background-image: url('../../staic/b3.jpg');
    background-repeat: no-repeat;
    background-position: center top;
    background-size: cover;
    background-attachment: scroll;
}

.content-layout {
    display: flex;
    gap: 30px;
}

.content-main {
    flex: 1;
    min-width: 0;
    background: #fff;
    border: 1px solid #e0e0e0;
    padding: 18px 22px 12px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 0;
    padding-bottom: 14px;
    border-bottom: 1px solid #e0e0e0;
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb a:hover {
    color: var(--color-red);
}

.breadcrumb-sep {
    margin: 0 4px;
}

.breadcrumb-current {
    color: var(--color-text-light);
}

/* ===== Section Title ===== */
.section-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--color-text);
    padding: 16px 0 12px;
    border-bottom: 1px solid #e0e0e0;
    margin-bottom: 0;
}

/* ===== News List ===== */
.news-list {
    margin-top: 0;
}

.news-item {
    display: flex;
    gap: 20px;
    padding: 22px 0;
    border-bottom: 1px dashed #ddd;
}

.news-item:last-child {
    border-bottom: none;
}

.news-thumb {
    flex-shrink: 0;
    width: 220px;
    height: 140px;
    padding: 4px;
    border: 1px solid #ddd;
    background: #fff;
    box-sizing: border-box;
    overflow: hidden;
}

.news-thumb a {
    display: block;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.news-item:hover .news-thumb img {
    transform: scale(1.05);
}

.news-body {
    flex: 1;
    min-width: 0;
}

.news-title {
    font-size: 16px;
    font-weight: normal;
    margin-bottom: 10px;
    line-height: 1.5;
}

.news-title a {
    color: var(--color-text);
    display: inline-flex;
    align-items: flex-start;
    gap: 6px;
}

.news-title a::before {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 7px solid #e8831a;
    margin-top: 6px;
    flex-shrink: 0;
}

.news-title a:hover {
    color: var(--color-red);
}

.news-excerpt {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Pagination ===== */
.pagination {
    text-align: right;
    padding: 16px 0 8px;
    margin-top: 4px;
    border-top: 1px dashed #ddd;
    font-size: 13px;
    color: var(--color-text-muted);
}

.pagination--links {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.pagination--links .page-link,
.pagination--links .page-num {
    display: inline-block;
    padding: 4px 10px;
    font-size: 13px;
    color: var(--color-text-light);
    border: 1px solid #ddd;
    background: #fff;
}

.pagination--links .page-num.active {
    color: #fff;
    background: var(--color-red);
    border-color: var(--color-red);
}

.pagination--links .page-link:hover,
.pagination--links .page-num:hover {
    color: var(--color-red);
    border-color: var(--color-red);
}

.pagination--links .page-link.disabled {
    color: #ccc;
    border-color: #eee;
    pointer-events: none;
}

/* ===== Solutions Page (解决方案) ===== */
.main-content--solutions {
    background-color: #f8f8f8;
    background-image: url('../../staic/b3.jpg');
    background-repeat: no-repeat;
    background-position: center top;
    background-size: cover;
}

.solution-content {
    padding: 20px 0 10px;
}

.solution-block {
    margin-bottom: 28px;
}

.solution-block:last-child {
    margin-bottom: 0;
}

.solution-heading {
    font-size: 15px;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 12px;
}

.solution-block p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
}

.solution-list p {
    margin-bottom: 8px;
    padding-left: 0;
}

.solution-list p:last-child {
    margin-bottom: 0;
}

.content-main--operation {
    position: relative;
    overflow: hidden;
}

.solution-content--operation {
    position: relative;
    z-index: 1;
}

.solution-content--operation::before {
    content: '';
    position: absolute;
    right: -20px;
    top: 0;
    width: 55%;
    height: 100%;
    min-height: 320px;
    background-size: contain;
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
}

.solution-content--operation .solution-block {
    position: relative;
    z-index: 1;
}

.solution-ol {
    margin: 12px 0 0;
    padding-left: 22px;
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
}

.solution-ol li {
    margin-bottom: 4px;
}

.solution-ol li:last-child {
    margin-bottom: 0;
}

.content-main--planning {
    position: relative;
    overflow: hidden;
}

.solution-content--planning {
    position: relative;
    z-index: 1;
}

.solution-content--planning::before {
    content: '';
    position: absolute;
    right: -20px;
    top: 0;
    width: 55%;
    height: 100%;
    min-height: 320px;
    background-size: contain;
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
}

.solution-content--planning .solution-block,
.solution-content--planning .planning-figure {
    position: relative;
    z-index: 1;
}

.solution-subtitle {
    font-size: 15px;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 12px;
}

.solution-example {
    margin-top: 8px;
    font-weight: normal;
}

.planning-figure {
    margin: 16px 0 20px;
    padding: 0;
}

.planning-figure img {
    display: block;
    width: 100%;
    height: auto;
}

/* ===== Careers Page (加入我们) ===== */
.main-content--careers {
    background-color: #f8f8f8;
}

.content-main--careers {
    position: relative;
    overflow: hidden;
    min-height: 320px;
}

.content-main--careers::before {
    content: '';
    position: absolute;
    right: -40px;
    top: 60px;
    width: 55%;
    height: 80%;
    background-size: contain;
    opacity: 0.1;
    pointer-events: none;
    z-index: 0;
}

.careers-content {
    position: relative;
    z-index: 1;
    padding: 16px 0 32px;
    min-height: 200px;
}

.careers-section--text p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    margin: 0 0 14px;
}

.careers-section--text p:last-child {
    margin-bottom: 0;
}

.careers-section {
    margin-bottom: 24px;
}

.careers-section--images .careers-figure {
    margin: 0 0 20px;
    text-align: center;
}

.careers-section--images .careers-figure img {
    max-width: 100%;
    height: auto;
}

.careers-section--images figcaption {
    margin-top: 8px;
    font-size: 12px;
    color: var(--color-text-muted);
}

.careers-placeholder {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 2;
    margin: 0;
}

/* ===== Cooperation Page (商务合作) ===== */
.main-content--cooperation {
    background-color: #f8f8f8;
}

.content-main--cooperation {
    position: relative;
    overflow: hidden;
}

.content-main--cooperation::before {
    content: '';
    position: absolute;
    right: -40px;
    top: 60px;
    width: 55%;
    height: 75%;
    background-size: contain;
    opacity: 0.1;
    pointer-events: none;
    z-index: 0;
}

.cooperation-content {
    position: relative;
    z-index: 1;
    padding: 16px 0 32px;
}

.cooperation-placeholder {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 2;
    margin: 0;
}

.cooperation-section {
    margin-bottom: 22px;
}

.cooperation-section:last-child {
    margin-bottom: 0;
}

.cooperation-section-title {
    font-size: 14px;
    font-weight: bold;
    color: var(--color-red);
    margin: 0 0 10px;
}

.cooperation-section p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    margin: 0 0 10px;
}

.cooperation-section p:last-child {
    margin-bottom: 0;
}

.cooperation-section ul {
    margin: 0;
    padding-left: 22px;
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
}

.cooperation-section li {
    margin-bottom: 6px;
}

.cooperation-section strong {
    color: var(--color-text);
    font-weight: bold;
}

/* ===== CSR Page (企业公民) ===== */
.main-content--csr {
    background-color: #f8f8f8;
}

.csr-coming-soon {
    margin: 24px 0 32px;
    padding: 80px 24px;
    text-align: center;
    background: #d32f2f;
    color: #fff;
}

.csr-coming-soon-title {
    margin: 0 0 12px;
    font-size: 36px;
    font-weight: bold;
    letter-spacing: 4px;
}

.csr-coming-soon-desc {
    margin: 0;
    font-size: 14px;
    opacity: 0.95;
}

/* ===== Contact Page (联系我们) ===== */
.main-content--contact {
    background-color: #f8f8f8;
}

.content-main--contact {
    position: relative;
    overflow: hidden;
}

.content-main--contact::before {
    content: '';
    position: absolute;
    right: -40px;
    top: 0;
    width: 55%;
    height: 100%;
    min-height: 360px;
    background-size: contain;
    opacity: 0.08;
    pointer-events: none;
    z-index: 0;
}

.content-main--contact .section-title,
.content-main--contact .contact-banner,
.content-main--contact .contact-body {
    position: relative;
    z-index: 1;
}

.contact-banner {
    margin-bottom: 24px;
}

.contact-banner img {
    display: block;
    width: 100%;
    height: auto;
}

.contact-body {
    display: flex;
    align-items: flex-start;
    gap: 36px;
    padding: 4px 0 20px;
}

.contact-qr {
    flex: 0 0 186px;
    position: relative;
    padding: 14px;
    background: #fff;
}

.contact-qr::before,
.contact-qr::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-color: #ccc;
    border-style: solid;
    pointer-events: none;
}

.contact-qr::before {
    top: 0;
    left: 0;
    border-width: 2px 0 0 2px;
}

.contact-qr::after {
    bottom: 0;
    right: 0;
    border-width: 0 2px 2px 0;
}

.contact-qr img {
    display: block;
    width: 100%;
    height: auto;
}

.contact-info {
    flex: 1;
    min-width: 0;
    padding-top: 4px;
}

.contact-company {
    font-size: 15px;
    font-weight: bold;
    color: var(--color-text);
    margin: 0 0 18px;
}

.contact-line {
    margin: 0 0 10px;
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.9;
}

.contact-line a {
    color: var(--color-text);
}

.contact-line a:hover {
    color: var(--color-red);
}

.contact-service-hotline {
    margin: 20px 0 0;
    font-size: 15px;
    font-weight: bold;
    color: var(--color-red);
}

@media (max-width: 640px) {
    .contact-body {
        flex-direction: column;
        align-items: center;
    }

    .contact-qr {
        flex: 0 0 auto;
        max-width: 200px;
    }

    .contact-info {
        width: 100%;
    }
}

/* ===== About Page (恒润企业) ===== */
.main-content--about {
    background-color: #f8f8f8;
}

.content-main--about {
    position: relative;
    overflow: hidden;
}

.about-content {
    position: relative;
    z-index: 1;
    padding: 16px 0 24px;
}

.about-content::before {
    content: '';
    position: absolute;
    right: -40px;
    top: 0;
    width: 60%;
    height: 100%;
    min-height: 360px;
    background-size: contain;
    opacity: 0.1;
    pointer-events: none;
    z-index: 0;
}

.about-content p {
    position: relative;
    z-index: 1;
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    margin-bottom: 14px;
}

.about-content p:last-child {
    margin-bottom: 0;
}

.page-placeholder-text {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 2;
    text-align: center;
    padding: 40px 0;
}

.about-content--image {
    padding: 16px 0 28px;
}

.about-content--image::before {
    display: none;
}

.about-page-figure {
    margin: 0;
    padding: 0;
    text-align: center;
}

.about-page-figure img {
    display: inline-block;
    max-width: 100%;
    height: auto;
    vertical-align: top;
}

/* ===== Cases Page (项目案例) ===== */
.main-content--cases {
    background-color: #f8f8f8;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 24px;
    padding: 24px 0 10px;
}

.case-card {
    text-align: center;
}

.case-card-image {
    position: relative;
    display: block;
    border: 1px solid #ddd;
    padding: 4px;
    background: #fff;
    overflow: hidden;
    margin-bottom: 12px;
    transition:
        border-color 0.32s ease,
        box-shadow 0.32s ease,
        transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card-image::before {
    content: '';
    position: absolute;
    inset: 4px;
    border: 2px solid var(--color-red);
    opacity: 0;
    transform: scale(0.97);
    transition:
        opacity 0.32s ease,
        transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 2;
}

.case-card:hover .case-card-image {
    border-color: var(--color-red);
    box-shadow: 0 8px 24px rgba(200, 22, 29, 0.16);
    transform: translateY(-5px);
}

.case-card:hover .case-card-image::before {
    opacity: 1;
    transform: scale(1);
}

.case-card-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover .case-card-image img {
    transform: scale(1.06);
}

.case-card-title {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.5;
    padding: 0 4px;
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover .case-card-title {
    transform: translateY(-2px);
}

.case-card-title a {
    position: relative;
    display: inline-block;
    color: inherit;
    transition: color 0.28s ease;
}

.case-card-title a::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -3px;
    height: 2px;
    background: var(--color-red);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover .case-card-title a {
    color: var(--color-red);
}

.case-card:hover .case-card-title a::after {
    transform: scaleX(1);
}

@media (prefers-reduced-motion: reduce) {
    .case-card-image,
    .case-card-image::before,
    .case-card-image img,
    .case-card-title,
    .case-card-title a::after {
        transition: none;
    }

    .case-card:hover .case-card-image,
    .case-card:hover .case-card-image img,
    .case-card:hover .case-card-title {
        transform: none;
    }
}

.case-detail-main {
    max-width: var(--container-width);
    margin: 0 auto;
}

.case-detail {
    padding: 8px 0 24px;
}

.case-detail-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--color-text);
    text-align: center;
    padding: 20px 16px 16px;
    margin: 0;
    border: none;
}

.case-detail-gallery {
    padding: 0 16px 24px;
}

.case-detail-image {
    text-align: center;
    margin: 0 0 20px;
    padding: 0;
}

.case-detail-image:last-child {
    margin-bottom: 0;
}

.case-detail-image img {
    display: inline-block;
    max-width: 100%;
    height: auto;
    vertical-align: top;
}

/* ===== Product Grid (产品服务) ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px 24px;
    padding: 24px 0 10px;
}

.product-card {
    text-align: center;
}

.product-card-image {
    position: relative;
    display: block;
    border: 1px solid #ddd;
    padding: 4px;
    background: #fff;
    overflow: hidden;
    margin-bottom: 12px;
    transition:
        border-color 0.32s ease,
        box-shadow 0.32s ease,
        transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card-image::before {
    content: '';
    position: absolute;
    inset: 4px;
    border: 2px solid var(--color-red);
    opacity: 0;
    transform: scale(0.97);
    transition:
        opacity 0.32s ease,
        transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 2;
}

.product-card:hover .product-card-image {
    border-color: var(--color-red);
    box-shadow: 0 8px 24px rgba(200, 22, 29, 0.16);
    transform: translateY(-5px);
}

.product-card:hover .product-card-image::before {
    opacity: 1;
    transform: scale(1);
}

.product-card-image img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-image img {
    transform: scale(1.06);
}

.product-card-title {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.6;
    padding: 0 4px;
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-title {
    transform: translateY(-2px);
}

.product-card-title a {
    position: relative;
    display: inline-block;
    color: inherit;
    transition: color 0.28s ease;
}

.product-card-title a::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -3px;
    height: 2px;
    background: var(--color-red);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-title a {
    color: var(--color-red);
}

.product-card:hover .product-card-title a::after {
    transform: scaleX(1);
}

@media (prefers-reduced-motion: reduce) {
    .product-card-image,
    .product-card-image::before,
    .product-card-image img,
    .product-card-title,
    .product-card-title a::after {
        transition: none;
    }

    .product-card:hover .product-card-image,
    .product-card:hover .product-card-image img,
    .product-card:hover .product-card-title {
        transform: none;
    }
}

/* ===== Product Detail (产品详情) ===== */
.content-main--product-detail {
    position: relative;
    overflow: hidden;
}

.content-main--product-detail::before {
    content: '';
    position: absolute;
    right: -60px;
    top: 80px;
    width: 50%;
    height: 70%;
    background-size: contain;
    opacity: 0.08;
    pointer-events: none;
    z-index: 0;
}

.product-detail {
    position: relative;
    z-index: 1;
    padding: 8px 0 24px;
}

.product-detail-hero {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 20px 0 24px;
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
}

.product-detail-thumb {
    flex: 0 0 200px;
    border: 1px solid #e0e0e0;
    padding: 8px;
    background: #fff;
}

.product-detail-thumb img {
    display: block;
    width: 100%;
    height: auto;
}

.product-detail-title {
    flex: 1;
    margin: 0;
    font-size: 20px;
    font-weight: bold;
    color: var(--color-text);
    line-height: 1.5;
}

.product-detail-body {
    padding-top: 4px;
}

.product-detail-section {
    margin-bottom: 24px;
}

.product-detail-section:last-child {
    margin-bottom: 0;
}

.product-detail-section--text p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    margin: 0 0 14px;
}

.product-detail-section--text p:last-child {
    margin-bottom: 0;
}

.product-detail-section--images .product-detail-figure {
    margin-bottom: 20px;
}

.product-detail-section--images .product-detail-figure:last-child {
    margin-bottom: 0;
}

.product-detail-figure {
    margin: 0 0 24px;
    text-align: center;
}

.product-detail-figure:last-child {
    margin-bottom: 0;
}

.product-detail-figure img {
    display: inline-block;
    max-width: 100%;
    height: auto;
    vertical-align: top;
}

.product-detail-caption {
    margin-top: 10px;
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.product-detail-block {
    margin-top: 28px;
}

.product-block-heading {
    font-size: 14px;
    font-weight: bold;
    color: var(--color-text);
    margin: 0 0 12px;
}

.product-block-paragraph {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    margin: 0;
}

.product-block-list {
    margin: 0;
    padding-left: 22px;
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
}

.product-block-list li {
    margin-bottom: 6px;
}

.product-section-heading {
    font-size: 14px;
    font-weight: bold;
    color: var(--color-text);
    margin: 0 0 12px;
}

.product-detail-install p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    margin: 0;
}

.product-spec-tables {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.product-spec-table {
    background: #f07d00;
    border-radius: 8px;
    overflow: hidden;
    color: #fff;
}

.product-spec-table-title {
    margin: 0;
    padding: 12px 14px;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    background: rgba(0, 0, 0, 0.08);
}

.product-spec-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.product-spec-table th,
.product-spec-table td {
    padding: 8px 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.25);
    vertical-align: top;
    line-height: 1.6;
}

.product-spec-table th {
    width: 38%;
    font-weight: normal;
    text-align: left;
    white-space: nowrap;
}

.product-spec-table td {
    text-align: left;
}

@media (max-width: 768px) {
    .product-spec-tables {
        grid-template-columns: 1fr;
    }

    .product-detail-hero {
        flex-direction: column;
        align-items: flex-start;
    }

    .product-detail-thumb {
        flex: 0 0 auto;
        width: 100%;
        max-width: 280px;
    }

}

/* ===== Sidebar ===== */
.sidebar {
    width: 280px;
    flex-shrink: 0;
}

.sidebar-phone {
    background: var(--color-red);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 18px 20px;
    margin-bottom: 15px;
}

.phone-icon {
    display: flex;
    align-items: center;
}

.phone-number {
    font-size: 22px;
    font-weight: bold;
    letter-spacing: 1px;
}

/* 侧栏卡片：上图下文，文字在图片下方独立红条内 */
.sidebar-item {
    margin-bottom: 15px;
}

.sidebar-item-link {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    text-decoration: none;
}

.sidebar-item-media {
    overflow: hidden;
    flex: 0 0 auto;
}

.sidebar-item-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
    margin: 0;
    padding: 0;
    border: none;
    transition: transform 0.3s ease;
}

.sidebar-item-link:hover .sidebar-item-img {
    transform: scale(1.05);
}

.sidebar-item-caption {
    position: static;
    top: auto;
    bottom: auto;
    left: auto;
    right: auto;
    flex: 0 0 auto;
    width: 100%;
    margin: 0;
    padding: 8px 15px;
    background: var(--color-red);
    color: #fff;
    display: flex;
    align-items: baseline;
    gap: 10px;
    box-sizing: border-box;
}

.caption-cn {
    font-size: 15px;
    font-weight: bold;
}

.caption-en {
    font-size: 12px;
    opacity: 0.85;
    letter-spacing: 1px;
}

/* ===== Footer ===== */
.site-footer {
    background: #fff;
    border-top: 1px solid var(--color-border);
    padding: 25px 0 20px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px 20px;
    margin-bottom: 15px;
}

.footer-links a {
    font-size: 13px;
    color: var(--color-text-light);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 10px;
}

.footer-icp {
    flex: 1;
    text-align: center;
    font-size: 12px;
    color: var(--color-text-muted);
}

.footer-icp a {
    color: var(--color-text-muted);
}

.footer-icp a:hover {
    color: var(--color-red);
}

.footer-support {
    font-size: 12px;
    color: var(--color-text-muted);
    white-space: nowrap;
}

/* ===== Placeholder Page ===== */
.page-placeholder {
    padding: 60px 0;
    text-align: center;
    color: var(--color-text-muted);
}

.page-placeholder h2 {
    font-size: 24px;
    color: var(--color-text);
    margin-bottom: 10px;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .header-inner {
        flex-wrap: wrap;
        align-items: center;
        height: auto;
        min-height: 56px;
        padding: 10px 0;
        gap: 0;
    }

    .header-tools {
        margin-left: auto;
    }

    .menu-toggle {
        display: inline-flex;
        color: var(--color-text);
    }

    .search-btn {
        height: 44px;
    }

    .main-nav {
        display: none;
        order: 10;
        flex: 0 0 100%;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        border-top: 1px solid var(--color-border);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    }

    .main-nav.is-open {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        height: auto;
    }

    .nav-item {
        border-bottom: 1px solid #eee;
    }

    .nav-link {
        height: auto;
        min-height: 48px;
        padding: 12px 16px;
        white-space: normal;
    }

    .nav-item:active > .nav-link::before,
    .nav-item.nav-expanded > .nav-link::before,
    .nav-item.is-active > .nav-link::before,
    .nav-link.active::before {
        transform: scaleX(1);
    }

    .nav-item:active > .nav-link,
    .nav-item.nav-expanded > .nav-link,
    .nav-item.is-active > .nav-link,
    .nav-link.active {
        color: #fff;
    }

    .nav-submenu {
        position: static;
        left: auto !important;
        width: 100% !important;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
        display: none;
        background: var(--color-nav-submenu);
        border-top: none;
        transition: none;
    }

    .nav-item.has-children.nav-expanded .nav-submenu {
        display: block;
    }

    .nav-submenu-inner {
        padding: 0;
    }

    .nav-submenu-list {
        flex-direction: column;
        align-items: stretch;
        flex-wrap: nowrap;
        height: auto;
        padding: 0;
    }

    .nav-item.has-children .nav-submenu-link {
        color: #fff;
        opacity: 0;
        transform: translateY(8px);
        padding: 11px 16px 11px 32px;
        white-space: normal;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        transition:
            opacity 0.22s ease,
            transform 0.22s ease,
            background 0.2s ease;
    }

    .nav-item.has-children.nav-expanded .nav-submenu-link {
        opacity: 1;
        transform: translateY(0);
    }

    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(1) .nav-submenu-link { transition-delay: 0.04s; }
    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(2) .nav-submenu-link { transition-delay: 0.08s; }
    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(3) .nav-submenu-link { transition-delay: 0.12s; }
    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(4) .nav-submenu-link { transition-delay: 0.16s; }
    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(5) .nav-submenu-link { transition-delay: 0.2s; }
    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(6) .nav-submenu-link { transition-delay: 0.24s; }
    .nav-item.has-children.nav-expanded .nav-submenu-list li:nth-child(n+7) .nav-submenu-link { transition-delay: 0.28s; }

    .nav-submenu-link:first-child {
        padding-left: 32px;
    }

    .nav-submenu-link:last-child {
        border-bottom: none;
    }

    .nav-submenu-link:active,
    .nav-submenu-link:hover,
    .nav-submenu-link.active {
        color: #fff;
        opacity: 1;
        background: rgba(0, 0, 0, 0.18);
    }

    .banner-image {
        height: 180px;
    }

    .banner-info-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding-top: 16px;
        padding-bottom: 16px;
    }

    .banner-title-img {
        max-height: 52px;
    }

    .content-layout {
        flex-direction: column;
        gap: 20px;
    }

    .content-main {
        padding: 14px 14px 10px;
    }

    .sidebar {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .sidebar-phone {
        grid-column: 1 / -1;
    }

    .case-grid {
        grid-template-columns: 1fr;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .pagination {
        text-align: center;
    }

    .pagination--links {
        justify-content: center;
    }

    .site-header--home {
        background: rgba(0, 0, 0, 0.35);
    }

    .site-header--home.site-header--menu-open {
        background: #fff;
    }

    .site-header--home .menu-toggle {
        color: #fff;
    }

    .site-header--home.site-header--menu-open .menu-toggle,
    .site-header--home.site-header--menu-open .nav-link {
        color: var(--color-text);
    }

    .site-header--home .main-nav.is-open .nav-link {
        color: var(--color-text);
    }

    .site-header--home .main-nav.is-open .nav-item:active > .nav-link,
    .site-header--home .main-nav.is-open .nav-item.nav-expanded > .nav-link,
    .site-header--home .main-nav.is-open .nav-item.is-active > .nav-link,
    .site-header--home .main-nav.is-open .nav-link.active {
        color: #fff;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 12px;
    }

    .news-item {
        flex-direction: column;
        gap: 12px;
        padding: 16px 0;
    }

    .news-thumb {
        width: 100%;
        height: 180px;
    }

    .product-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .banner-image {
        height: 150px;
    }

    .banner-info-aside {
        min-width: 0;
        width: 100%;
        justify-content: flex-start;
    }

    .banner-tabs {
        flex-wrap: wrap;
        width: 100%;
    }

    .banner-tab {
        flex: 1 1 auto;
        text-align: center;
        padding: 8px 12px;
        font-size: 13px;
    }

    .sidebar {
        grid-template-columns: 1fr;
    }

    .breadcrumb {
        line-height: 1.8;
        word-break: break-all;
    }

    .footer-links {
        gap: 8px 14px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
    }

    .product-spec-table th {
        white-space: normal;
    }

    .product-spec-table {
        overflow-x: auto;
    }
}

/* ===== Home Page ===== */
.page-home {
    background: #fff;
}

.site-header--home {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    background: transparent;
    border-top: none;
}

.site-header--home .header-inner {
    height: auto;
    min-height: 88px;
    align-items: center;
    padding: 14px 0;
}

.site-header--home .logo--image {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.site-header--home .nav-link {
    color: #fff;
}

.site-header--home .nav-link::before {
    background: var(--color-red);
}

.site-header--home .search-btn {
    background: var(--color-red);
    color: #fff;
}

.home-hero {
    position: relative;
    min-height: 72vh;
    min-height: 72dvh;
    overflow: hidden;
    background: #111;
}

.home-hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.home-hero-overlay {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: inherit;
    padding: 88px 20px 48px;
}

.home-hero-brand {
    max-width: min(720px, 88vw);
    width: 100%;
    height: auto;
    display: block;
}

.home-about {
    position: relative;
    min-height: auto;
    overflow: hidden;
}

.home-about-bg {
    position: absolute;
    inset: 0;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

.home-about-inner {
    position: relative;
    z-index: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 56px 20px 72px;
    text-align: center;
}

.home-about-head {
    position: relative;
    margin-bottom: 28px;
}

.home-about-title {
    position: relative;
    margin: 0;
}

.home-about-title-img {
    display: block;
    margin: 0 auto;
    max-width: min(520px, 88vw);
    height: auto;
}

.home-about-text {
    text-align: center;
}

.home-about-text p {
    margin: 0;
    font-size: 14px;
    font-family: "微软雅黑";
    line-height: 2.2;
    color: var(--color-text-light);
    text-align: center;
}

.home-scroll-hint {
    display: inline-flex;
    margin-top: 36px;
    color: var(--color-text-muted);
    opacity: 0.7;
    transition: opacity 0.2s;
}

.home-scroll-hint:hover {
    opacity: 1;
}

.home-scroll-icon {
    display: block;
    width: 22px;
    height: 34px;
    border: 2px solid currentColor;
    border-radius: 12px;
    position: relative;
}

.home-scroll-icon::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 7px;
    width: 4px;
    height: 4px;
    margin-left: -2px;
    border-radius: 50%;
    background: currentColor;
    animation: home-scroll-dot 1.6s ease-in-out infinite;
}

@keyframes home-scroll-dot {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    70% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 0;
        transform: translateY(10px);
    }
}

@media (max-width: 992px) {
    .site-header--home .header-inner {
        min-height: 68px;
        padding: 10px 0;
    }

    .site-header:not(.site-header--home) .header-inner {
        min-height: 68px;
        padding: 8px 0;
    }

    .logo--site .logo-img {
        width: 240px;
        max-width: 52vw;
    }

    .logo--home .logo-img {
        width: 200px;
        max-width: 46vw;
    }

    .site-header--home .search-btn {
        background: var(--color-red);
        color: #fff;
    }

    .home-hero {
        min-height: 58vh;
        min-height: 58dvh;
    }

    .home-hero-overlay {
        padding-top: 88px;
        padding-bottom: 32px;
    }

    .home-hero-brand {
        max-width: min(520px, 90vw);
    }

    .home-about-inner {
        padding: 40px 16px 56px;
    }

    .home-about-title-img {
        max-width: min(360px, 90vw);
    }
}