body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #ffffff;
    color: #222;
}

header {
    height: 80px;
    padding: 0 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #ddd;
}

.logo {
    font-size: 28px;
    font-weight: bold;
}

nav {
    display: flex;
    gap: 24px;
}

nav a {
    text-decoration: none;
    color: #222;
    font-size: 16px;
}

.hero {
    min-height: 500px;
    padding: 100px 50px;

    background-image:
        linear-gradient(
            90deg,
            rgba(0, 0, 0, 0.65) 0%,
            rgba(0, 0, 0, 0.40) 45%,
            rgba(0, 0, 0, 0.05) 100%
        ),
        url("images/hero.png");

    background-size: cover;
    background-position: center;

    display: flex;
    flex-direction: column;
    justify-content: center;

    color: white;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
}

button {
    padding: 12px 24px;
    font-size: 16px;
    width: fit-content;

    background: white;
    color: #222;
    border: none;
    cursor: pointer;
}

.products {
    padding: 80px 50px;
    background: white;
}

.products h2 {
    font-size: 36px;
    margin-bottom: 40px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    border: 1px solid #ddd;
    background: white;
}

.product-image {
    height: 220px;
    background: #eeeeee;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.product-card h3 {
    margin: 0;
    padding: 20px;
    font-size: 20px;
}

.about {
    padding: 80px 50px;
    background: #f5f5f5;

    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about h2 {
    font-size: 36px;
    margin-bottom: 25px;
}

.about p {
    font-size: 18px;
    line-height: 1.6;
}

.about-image {
    height: 350px;
    background: #dddddd;
}

.services {
    padding: 80px 50px;
    background: white;
}

.services h2 {
    font-size: 36px;
    margin-bottom: 40px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 30px;
    background: #f5f5f5;
    border: 1px solid #ddd;
}

.service-card h3 {
    margin-top: 0;
    font-size: 22px;
}

.service-card p {
    line-height: 1.6;
}

.projects {
    padding: 80px 50px;
    background: #f5f5f5;
}

.projects h2 {
    font-size: 36px;
    margin-bottom: 40px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: white;
}

.project-image {
    height: 260px;
    background: #dddddd;
}

.project-card h3 {
    margin: 0;
    padding: 20px;
    font-size: 20px;
}

.news {
    padding: 80px 50px;
    background: white;
}

.news h2 {
    font-size: 36px;
    margin-bottom: 40px;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    padding: 30px;
    background: #f5f5f5;
    border: 1px solid #ddd;
}

.news-card h3 {
    margin-top: 0;
    font-size: 22px;
}

.news-card p {
    line-height: 1.6;
}

.cooperation {
    padding: 80px 50px;
    background: #f5f5f5;
}

.cooperation h2 {
    font-size: 36px;
    margin-bottom: 40px;
}

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cooperation-card {
    padding: 30px;
    background: white;
    border: 1px solid #ddd;
}

.cooperation-card h3 {
    margin-top: 0;
    font-size: 22px;
}

.cooperation-card p {
    line-height: 1.6;
}

.contact {
    padding: 80px 50px;
    background: white;

    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact h2 {
    font-size: 36px;
    margin-top: 0;
}

.contact-info p {
    font-size: 17px;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    padding: 14px;
    font-size: 16px;
    border: 1px solid #ccc;
    font-family: Arial, sans-serif;
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-form button {
    padding: 14px 24px;
    font-size: 16px;
    width: fit-content;
    background: #222;
    color: white;
    border: none;
    cursor: pointer;
}

.hero-button {
    display: inline-block;
    padding: 12px 24px;
    width: fit-content;

    background: white;
    color: #222;

    text-decoration: none;
    font-size: 16px;
}

html {
    scroll-behavior: smooth;
}

@media (max-width: 768px) {

    header {
        height: auto;
        padding: 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    nav {
        display: flex;
        flex-wrap: wrap;
        gap: 10px 16px;
    }

    nav a {
        font-size: 14px;
    }

    .hero {
        padding: 60px 20px;
        min-height: 420px;
    }

    .hero h1 {
        font-size: 30px;
        line-height: 1.15;
    }

    .products,
    .services,
    .projects,
    .news,
    .cooperation,
    .contact {
        padding: 60px 20px;
    }

    .product-grid,
    .service-grid,
    .project-grid,
    .news-grid,
    .cooperation-grid {
        grid-template-columns: 1fr;
    }

    .about,
    .contact {
        grid-template-columns: 1fr;
        padding: 60px 20px;
    }

    .about-image {
        height: 250px;
    }
}

footer {
    background: #222;
    color: white;
    padding: 50px;
    position: static;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
}

.footer-content h3 {
    margin-top: 0;
    font-size: 26px;
}

.footer-bottom {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #444;
    font-size: 14px;
}

.product-page {
    padding: 80px 50px;
}

.product-page h1 {
    font-size: 38px;
    margin-bottom: 10px;
}

.product-page-intro {
    margin-bottom: 40px;
}

.sub-category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.sub-category-card {
    border: 1px solid #ddd;
    background: white;
}

.sub-category-image {
    height: 220px;
    background: #eee;
}

.sub-category-card h3 {
    padding: 20px;
    margin: 0;
}

@media (max-width: 768px) {
    .product-page {
        padding: 50px 20px;
    }

    .sub-category-grid {
        grid-template-columns: 1fr;
    }
}

.product-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.product-link:hover .product-card {
    transform: translateY(-4px);
}

.product-card {
    transition: 0.2s;
}

.detail-page {
    padding: 80px 50px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.detail-image {
    min-height: 520px;
    background: #eee;
}

.detail-category {
    color: #777;
    margin-bottom: 10px;
}

.detail-info h1 {
    font-size: 42px;
    margin-top: 0;
}

.detail-placeholder {
    border-top: 1px solid #ddd;
    padding: 20px 0;
}

.detail-button {
    display: inline-block;
    margin-top: 20px;
    padding: 14px 22px;
    background: #222;
    color: white;
    text-decoration: none;
}

.detail-specs {
    padding: 70px 50px;
    background: #f5f5f5;
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.spec-card {
    background: white;
    padding: 30px;
    border: 1px solid #ddd;
}

@media (max-width: 768px) {
    .detail-page {
        grid-template-columns: 1fr;
        padding: 50px 20px;
    }

    .detail-specs {
        padding: 50px 20px;
    }

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

    .detail-image {
        min-height: 300px;
    }
}

.category-tabs {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    margin: 30px 0 50px;
    border: 1px solid #ddd;
}

.category-tabs a {
    padding: 22px 12px;
    text-align: center;
    text-decoration: none;
    color: #333;
    border-right: 1px solid #ddd;
    background: white;
    font-size: 14px;
}

.category-tabs a:last-child {
    border-right: none;
}

.category-tabs a:hover {
    background: #f5f5f5;
}

.category-tabs a.active {
    background: #222;
    color: white;
}

@media (max-width: 768px) {
    .category-tabs {
        grid-template-columns: 1fr 1fr;
    }

    .category-tabs a {
        border-bottom: 1px solid #ddd;
    }
}

/* Why AusVista */

.why-ausvista {
    padding: 80px 50px;
    background: #f5f5f5;
}

.why-ausvista h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.why-intro {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.why-card {
    padding: 30px;
    background: white;
    border: 1px solid #ddd;
}

.why-card h3 {
    font-size: 22px;
    margin-top: 0;
}

.why-card p {
    font-size: 16px;
    line-height: 1.6;
    color: #555;
}

/* Mobile */

@media (max-width: 768px) {

    .why-ausvista {
        padding: 60px 20px;
    }

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

    .why-ausvista h2 {
        font-size: 30px;
    }

}

/* Hero Brand Text */

.hero-label {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 64px;
    margin: 0 0 15px;
}

.hero h2 {
    font-size: 36px;
    font-weight: 500;
    margin: 0 0 25px;
    max-width: 800px;
}

.hero-slogan {
    font-size: 20px;
    margin-bottom: 35px;
}

/* Mobile Hero Text */

@media (max-width: 768px) {

    .hero h1 {
        font-size: 44px;
    }

    .hero h2 {
        font-size: 26px;
    }

    .hero-label {
        font-size: 11px;
        letter-spacing: 2px;
    }

    .hero-slogan {
        font-size: 16px;
    }

}

.hero h2 {
    font-weight: 600;
    line-height: 1.3;
}

.hero-label {
    font-weight: 700;
}

.hero-slogan {
    font-weight: 500;
}

/* Window Replacement Section */

.replacement {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 80px 50px;
    background: #ffffff;
}

.replacement-image {
    min-height: 380px;
    background: #e9eaec;
    overflow: hidden;
}

.replacement-image img {
    width: 100%;
    height: 100%;
    min-height: 380px;
    object-fit: cover;
    display: block;
}

.replacement-label {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #777;
}

.replacement-text h2 {
    font-size: 38px;
    margin: 15px 0;
}

.replacement-text h3 {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 25px;
}

.replacement-text > p:not(.replacement-label) {
    color: #555;
    line-height: 1.7;
}

.replacement-button {
    display: inline-block;
    margin-top: 25px;
    padding: 14px 24px;
    background: #222;
    color: white;
    text-decoration: none;
}

.replacement-button:hover {
    background: #444;
}

/* Mobile */

@media (max-width: 768px) {

    .replacement {
        grid-template-columns: 1fr;
        padding: 50px 20px;
        gap: 30px;
    }

    .replacement-image {
        min-height: 240px;
    }

    .replacement-image img {
        min-height: 240px;
    }

    .replacement-text h2 {
        font-size: 30px;
    }

    .replacement-text h3 {
        font-size: 19px;
    }
}

/* 首页 Products 下拉菜单 */

.products-menu {
    position: relative;
    display: flex;
    align-items: center;
}

.products-menu-label {
    color: #222;
    font-size: 16px;
    cursor: default;
}

.products-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 170px;
    padding: 10px 0;
    background: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    z-index: 1000;
}

.products-menu:hover .products-dropdown,
.products-menu:focus-within .products-dropdown {
    display: block;
}

.products-dropdown a {
    display: block;
    padding: 12px 20px;
    color: #222;
    font-size: 16px;
    text-decoration: none;
    white-space: nowrap;
}

.products-dropdown a:hover {
    background: #f2f2f2;
}

/* 商用产品页面 */

/* 顶部横向灰色图片占位区 */
.commercial-banner {
    min-height: 420px;
    padding: 40px 20px;
    box-sizing: border-box;
    background: #e5e5e5;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.commercial-banner h1 {
    margin: 0 0 16px;
    font-size: 42px;
    color: #333;
}

.commercial-banner p {
    margin: 0;
    font-size: 18px;
    color: #777;
}

/* 两个品牌框：占满页面宽度，左右各一半 */
.commercial-brands {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
}

.commercial-brand {
    min-height: 90px;
    padding: 20px;
    border: 1px solid #ccc;
    background: #fff;
    color: #222;
    font-family: inherit;
    font-size: 26px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

/* 中间只保留一条边框 */
.commercial-brand + .commercial-brand {
    border-left: none;
}

/* 鼠标移上去时 */
.commercial-brand:hover {
    background: #f0f0f0;
}

/* 点击选中时 */
.commercial-brand.active {
    background: #222;
    color: #fff;
}

/* 产品展示区域 */
.commercial-products {
    padding: 50px;
}

/* 电脑端每行 3 个产品 */
.commercial-product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
}

.commercial-product-card {
    min-width: 0;
    border: 1px solid #ddd;
    background: #fff;
}

/* 空的产品图片位置 */
.commercial-product-image {
    aspect-ratio: 4 / 3;
    background: #eee;
}

.commercial-product-card h2 {
    margin: 0;
    padding: 20px;
    font-size: 20px;
    line-height: 1.4;
    font-weight: 500;
}

/* 筛选时隐藏不属于该品牌的产品 */
.commercial-product-card[hidden] {
    display: none;
}

/* 平板端每行 2 个产品 */
@media (max-width: 1000px) {
    .commercial-product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* 手机端 */
@media (max-width: 600px) {
    .commercial-banner {
        min-height: 260px;
    }

    .commercial-banner h1 {
        font-size: 30px;
    }

    .commercial-brand {
        min-height: 75px;
        font-size: 22px;
    }

    .commercial-products {
        padding: 30px 20px;
    }

    .commercial-product-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* 调整商用页面的品牌选择栏 */

.commercial-brands {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;

    width: calc(100% - 100px);
    max-width: 1400px;
    margin: 35px auto 0;

    border: 1px solid #ccc;
    box-sizing: border-box;
}

.commercial-brands .commercial-brand {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 100%;
    max-width: none;
    min-width: 0;
    min-height: 85px;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;

    border: none;
    border-radius: 0;
    background: #fff;
    color: #333;

    font-family: inherit;
    font-size: 28px;
    font-weight: 500;

    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.commercial-brands .commercial-brand + .commercial-brand {
    border-left: 1px solid #ccc;
}

.commercial-brands .commercial-brand:hover {
    background: #f3f3f3;
}

.commercial-brands .commercial-brand.active {
    background: #222;
    color: #fff;
}

@media (max-width: 600px) {
    .commercial-brands {
        width: calc(100% - 40px);
        margin-top: 25px;
    }

    .commercial-brands .commercial-brand {
        min-height: 70px;
        font-size: 22px;
        padding: 15px;
    }
}

/* 首页新版首屏 */

.hero {
    position: relative;
    box-sizing: border-box;
    min-height: 720px;
    padding: 110px 6% 40px;

    display: flex;
    flex-direction: column;
    justify-content: center;

    color: #fff;
    text-align: left;
}

/* 主文字区域 */
.home-hero-content {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
}

.hero .home-hero-label {
    margin: 0 0 25px;
    color: #e6bd68;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.5;
    letter-spacing: 2.5px;
}

.hero .home-hero-title {
    margin: 0 0 32px;
    color: #fff;
    font-size: clamp(42px, 5vw, 76px);
    font-weight: 400;
    line-height: 1.12;
    letter-spacing: -1.5px;
}

.hero .home-hero-intro {
    max-width: 520px;
    margin: 0 0 20px;
    color: #fff;
    font-size: 22px;
    line-height: 1.5;
}

.hero .home-hero-description {
    max-width: 500px;
    margin: 0;
    color: #e0e6ed;
    font-size: 17px;
    line-height: 1.6;
}

/* 两个操作入口 */
.home-hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 28px;
    margin-top: 35px;
}

.home-quote-button {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 35px;

    padding: 20px 25px;
    background: #d4a645;
    color: #082d5b;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
}

.home-quote-button:hover {
    background: #e2b65a;
}

.home-explore-link {
    display: inline-flex;
    align-items: center;
    gap: 18px;

    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    font-size: 16px;
    text-decoration: none;
}

.home-explore-link:hover {
    border-bottom-color: #fff;
}

/* 首屏底部左右两侧的小字 */
.home-hero-notes {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;

    width: 100%;
    margin-top: 100px;
}

.hero .home-hero-notes p {
    margin: 0;
    color: #fff;
    font-size: 12px;
    line-height: 1.5;
}

/* 首屏下方的深蓝信息栏 */
.home-hero-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;

    padding: 25px 6%;
    background: #082d5b;
    color: #e2e8f0;
    font-size: 15px;
    line-height: 1.5;
}

/* 手机和平板 */
@media (max-width: 768px) {
    .hero {
        min-height: 650px;
        padding: 70px 24px 25px;
    }

    .hero .home-hero-title {
        font-size: clamp(36px, 7vw, 54px);
        letter-spacing: -1px;
    }

    .hero .home-hero-intro {
        font-size: 19px;
    }

    .hero .home-hero-description {
        font-size: 16px;
    }

    .home-hero-actions {
        gap: 20px;
        margin-top: 28px;
    }

    .home-hero-notes {
        margin-top: 70px;
        flex-wrap: wrap;
    }

    .home-hero-strip {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 22px 24px;
    }
}

/* 首页大图：增加高度 */
@media (min-width: 769px) {
    .hero {
        min-height: 100vh;
    }
}

/* 滚动时导航栏保持在顶部 */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #fff;
}

/* 首页底部小字靠近大图底边 */
.hero .home-hero-notes {
    position: absolute;
    left: 6%;
    right: 6%;
    bottom: 30px;
    width: auto;
    margin-top: 0;
}

/* 首页背景图片 */
.hero {
    background:
        linear-gradient(
            90deg,
            rgba(8, 45, 91, 0.8) 0%,
            rgba(8, 45, 91, 0.4) 45%,
            rgba(8, 45, 91, 0.05) 100%
        ),
        url("images/home-hero.png") center center / cover no-repeat;
}

/* 导航栏 Logo */
header .logo a {
    display: block;
}

header .logo img {
    display: block;
    width: 80px;
    height: auto;
}

/* 对照老板网站：首页文字与按钮 */
.hero .home-hero-label {
    font-size: 11px;
    letter-spacing: 2.1px;
    color: #eee1be;
    margin: 0 0 18px;
    line-height: 1.6;
}

.hero .home-hero-title {
    font-size: clamp(42px, 4.9vw, 72px);
    line-height: 1.08;
    letter-spacing: -2px;
    font-weight: 400;
    margin: 0 0 29px;
}

.hero .home-hero-intro {
    font-size: 20px;
    line-height: 1.5;
    max-width: 470px;
    margin: 0 0 16px;
}

.hero .home-hero-description {
    font-size: 15px;
    line-height: 1.6;
    max-width: 430px;
    color: #d8e3ee;
    margin: 0 0 15px;
}

.home-hero-actions {
    gap: 26px;
    margin-top: 31px;
}

.home-quote-button {
    padding: 15px 23px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.6;
    color: #102842;
}

.home-explore-link {
    gap: 15px;
    padding: 8px 0;
    font-size: 14px;
    line-height: 1.6;
}

/* 首页背景渐变与文字位置 */
@media (min-width: 769px) {
    .hero {
        padding: 0;
        justify-content: center;
        align-items: flex-start;
        background:
            linear-gradient(
                90deg,
                rgba(4, 27, 57, 0.88),
                rgba(4, 27, 57, 0.66) 30%,
                rgba(4, 27, 57, 0.03) 69%
            ),
            url("images/home-hero.png") center / cover no-repeat;
    }

    .home-hero-content {
        box-sizing: border-box;
        width: 100%;
        max-width: 820px;
        padding: 45px 6%;
        margin: 0;
    }
}

/* 大屏幕上文字向右留出更多空间 */
@media (min-width: 1600px) {
    .home-hero-content {
        margin-left: calc((100vw - 1400px) / 2);
    }
}

/* 大图底部的小字 */
.hero .home-hero-notes {
    left: 6%;
    right: 5%;
    bottom: 23px;
    gap: 20px;
}

.hero .home-hero-notes p {
    font-size: 11px;
    line-height: 1.6;
    color: #f3f6fa;
}

/* 右下角文字的半透明底色 */
.hero .home-hero-notes p:last-child {
    background: rgba(8, 45, 91, 0.53);
    padding: 2px 8px;
}

/* 大图下面的蓝色横栏 */
.home-hero-strip {
    gap: 20px;
    padding: 23px 6%;
    background: #082d5b;
    color: #dce6ef;
    font-size: 13px;
    line-height: 1.6;
    letter-spacing: 0.5px;
}

/* 电脑端导航栏高度和 Logo 位置 */
@media (min-width: 769px) {
    header {
        box-sizing: border-box;
        height: 95px;
        padding: 8px 5%;
    }

    header .logo {
        display: flex;
        align-items: center;
        width: 106px;
        height: 80px;
    }

    header .logo img {
        width: 106px;
        height: 78px;
        object-fit: contain;
    }
}

/* 电脑端首页大图高度 */
@media (min-width: 769px) {
    .hero {
        min-height: 710px;
        height: calc(100svh - 95px);
        max-height: 920px;
    }
}

/* 较窄的电脑屏幕 */
@media (min-width: 769px) and (max-width: 1000px) {
    .hero {
        min-height: 650px;
    }
}

/* 电脑端隐藏手机菜单按钮 */
.mobile-menu-toggle {
    display: none;
}

/* 手机端显示菜单按钮 */
@media (max-width: 768px) {
    header {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        padding: 6px 5%;
    }

    header .logo img {
        width: 88px;
        height: 65px;
        object-fit: contain;
    }

    .mobile-menu-toggle {
        display: inline-flex;
        align-items: center;
        gap: 15px;
        padding: 10px;
        border: 0;
        background: transparent;
        color: #082d5b;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 14px;
        cursor: pointer;
    }

    header nav {
        width: 100%;
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: row;
        flex-wrap: nowrap;
        height: 78px;
        box-sizing: border-box;
        padding: 6px 5%;
    }

    header .logo {
        margin: 0;
        width: 88px;
        height: 65px;
    }

    header nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        box-sizing: border-box;
        margin: 0;
        padding: 25px 6%;
        background: #fff;
        border-top: 1px solid #dce1e4;
        max-height: calc(100dvh - 78px);
        overflow-y: auto;
    }

    header nav.mobile-open {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    /* 手机上直接显示商用和民用入口 */
    header nav .products-dropdown {
        display: block;
        position: static;
        box-shadow: none;
        min-width: 0;
        margin-top: 8px;
    }
}

/* 手机端首页大图 */
@media (max-width: 768px) {
    .hero {
        height: auto;
        min-height: 770px;
        max-height: none;
        padding: 0;
        justify-content: flex-start;
        align-items: stretch;

        background:
            linear-gradient(
                180deg,
                rgba(4, 27, 57, 0.87),
                rgba(4, 27, 57, 0.72) 48%,
                rgba(4, 27, 57, 0.16) 79%,
                rgba(4, 27, 57, 0.56)
            ),
            url("images/home-hero.png") 73% center / cover no-repeat;
    }

    .home-hero-content {
        box-sizing: border-box;
        width: 100%;
        max-width: none;
        margin: 0;
        padding: 60px 6% 150px;
    }
}

/* 手机端首页文字与底部排版 */
@media (max-width: 768px) {
    .hero .home-hero-label {
        font-size: 9px;
        letter-spacing: 1.5px;
    }

    .hero .home-hero-title {
        font-size: 45px;
        letter-spacing: -1.3px;
        line-height: 1.08;
    }

    .hero .home-hero-intro {
        font-size: 18px;
        max-width: 350px;
        line-height: 1.5;
    }

    .hero .home-hero-description {
        font-size: 14px;
        max-width: 350px;
        line-height: 1.6;
    }

    .home-hero-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .hero .home-hero-notes {
        flex-direction: row;
        flex-wrap: nowrap;
        align-items: flex-end;
        gap: 20px;
    }

    .hero .home-hero-notes p {
        font-size: 9px;
        line-height: 1.6;
    }

    .hero .home-hero-notes p:first-child {
        max-width: 150px;
    }

    /* 手机端蓝色横栏：前两项一行，第三项另起一行 */
    .home-hero-strip {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 9px 20px;
        padding: 20px 6%;
        font-size: 11px;
    }

    .home-hero-strip span:last-child {
        width: 100%;
    }
}

.about-image {
    overflow: hidden;
}

.about-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}