header {
    background-image: url(../images/index/bannerImg.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 16px;
}

/* 1440px 及以下微调，保持较大视觉区域 */
@media (max-width: 1440px) {
    header {
        height: 95vh;
        padding: 0 32px;
    }

    nav[aria-label="主导航"] .logo img {
        width: 110px;
        height: 44px;
    }

    nav[aria-label="主导航"] a {
        font-size: 15px;
        /* >=12px */
    }

    header .nav-btn {
        font-size: 15px;
        padding: 11px 22px;
    }
}

/* 1280px 适配 */
@media (max-width: 1280px) {
    header {
        height: 92vh;
        padding: 0 28px;
    }

    nav[aria-label="主导航"] .logo img {
        width: 100px;
        height: 40px;
    }

    nav[aria-label="主导航"] a {
        font-size: 15px;
        /* >=12px */
    }

    header .nav-btn {
        font-size: 14px;
        padding: 11px 20px;
    }
}

/* 1024px 及以下：开始折叠导航、缩小文字 */
@media (max-width: 1024px) {
    header {
        height: 90vh;
    }

    nav[aria-label="主导航"] a {
        font-size: 14px;
        /* >=12px */
    }
}

/* 768px 及以下：移动端布局，文字不低于12px */
@media (max-width: 768px) {
    header {
        height: 60vh;
    }

    nav[aria-label="主导航"] {
        gap: 12px;
    }

    nav[aria-label="主导航"] a {
        font-size: 13px;
        /* >=12px */
    }

    header .nav-btn {
        padding: 10px 16px;
        font-size: 13px;
        /* width: 100%; */
        text-align: center;
    }

    .nav-hamburger span {
        width: 20px;
        height: 2px;
    }
}

@media (max-width: 425px) {
    header {
        padding: 0 20px;
    }

}

/* 极小屏：375px 及以下，确保最小文字尺寸 12px */
@media (max-width: 375px) {
    header {
        height: 50vh;
    }

    nav[aria-label="主导航"] .logo img {
        width: 92px;
        height: 36px;
    }

    nav[aria-label="主导航"] a {
        font-size: 12px;
        /* 最小字号 */
        min-width: 40px;
    }

    header .nav-btn {
        font-size: 12px;
        /* 最小字号 */
        padding: 8px 14px;
    }

    .arrow img {
        width: 24px;
        height: 24px;
    }

    .hero-content h1 {
        font-size: 24px;
    }

    .hero-content p {
        font-size: 14px;
    }
}

nav[aria-label="主导航"] {
    width: 100%;
    max-width: 1440px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0px;
    gap: 20px;
}

@media (min-width: 1440px) {
    nav[aria-label="主导航"] {
        padding: 16px 20px;
    }
}

nav[aria-label="主导航"] .logo img {
    width: 120px;
    height: 48px;
    vertical-align: middle;
    flex-shrink: 0;
}

nav[aria-label="主导航"] ul {
    display: flex;
    align-items: center;
    background-color: rgba(32, 32, 32, 0.2);
    border-radius: 999px;
    padding: 8px 12px;
    padding-left: 35px;
    width: fit-content;
    gap: 32px;
}

/* 汉堡菜单按钮（仅在小屏幕显示） */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 100;
    margin-left: 20px;
}

.nav-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #000;
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 汉堡按钮变成叉号的样式 */
nav[aria-label="主导航"]  .active span{
    background-color: #000!important;
}
.nav-hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}
#contactLi{
    display: none;
}
@media (max-width: 1024px) {
    nav[aria-label="主导航"] ul {
        display: none;
        position: fixed;
        top: 0px;
        left: 0;
        right: 0;
        flex-direction: column;
        justify-content: start;
        background: #fff;
        border-radius: 0;
        padding: 40px;
        padding-top: 55px;
        gap: 1px;
        z-index:6;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        max-width: none;
        width: 100%;
        max-width: 100%;
        min-height: 450px;
        overflow-y: auto;
    }

    nav[aria-label="主导航"] ul.active {
        display: flex;
    }

    nav[aria-label="主导航"] ul.active li {
        width: 100%;
        max-width: 100%;
        flex: 1;
        display: flex;
        align-items: center;
        border-bottom: 1px solid #eee;
    }

    nav[aria-label="主导航"] ul.active li a {
        display: block;
        color: #000;
        width: 100%;
        max-width: 100%;
    }

    .nav-hamburger {
        display: flex;
    }
}

@media (max-width: 768px) {
    nav[aria-label="主导航"] {
        flex-direction: row;
        gap: 12px;
    }

    nav[aria-label="主导航"] ul {
        gap: 16px;
        padding-left: 20px;
        padding: 50px 16px;
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    nav[aria-label="主导航"] a {
        font-size: 14px;
    }

    header .nav-btn {
        font-size: 14px;
    }
}

nav[aria-label="主导航"] a {

    min-width: 50px;
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    font-weight: 400;
    transition: color 0.3s;
}

nav[aria-label="主导航"] a:hover {
    color: #1D4ED8;
}

header .nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(90deg, #2563EB 0%, #3B82F6 100%);
    color: white;
    border: none;
    border-radius: 999px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s;
}

header .nav-btn:hover {
    transform: scale(1.02);
}

header .arrow img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

/* 头图 */
.hero_bg {
    width: 100%;
    max-width: 1440px;
    flex: 1;
    display: flex;
    align-items: center;
    margin-bottom: 200px;
}

.hero {
    width: 100%;
    height: 420px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    text-align: left;
    max-width: 600px;
}

.hero-content h1 {
    font-size: 64px;
    font-weight: 800;
    margin: 0 0 18px 0;
    line-height: 1.2;
}

@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 48px;
    }
}

@media (max-width: 768px) {
    .hero_bg {
        margin-bottom: 80px;
    }

    .hero {
        height: 300px;
    }

    .hero-content h1 {
        font-size: 32px;
        margin-bottom: 12px;
    }

    .hero-content p {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .hero-btns {
        gap: 12px;
        /* flex-direction: column; */
    }

    .hero-btn {
        padding: 10px 24px;
        font-size: 14px;
    }
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 32px;
}

.hero-btns {
    display: flex;
    gap: 18px;
}

@media (max-width: 1024px) {
    .hero-btns {
        gap: 14px;
    }
}

@media (max-width: 768px) {
    .hero-btns {
        gap: 10px;
        /* flex-direction: column; */
    }
}

.hero-btn {
    padding: 14px 42px;
    border-radius: 999px;
    border: none;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

@media (max-width: 1024px) {
    .hero-btn {
        padding: 11px 32px;
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    .hero-btn {
        padding: 10px 24px;
        font-size: 13px;
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-btn {
        padding: 8px 20px;
        font-size: 12px;
    }
}

/* 立即咨询按钮样式 */
.consult-btn {
    background-color: #ffffff;
    color: #333333;
    border: 1px solid #e5e7eb;
}

/* 立即咨询按钮悬浮效果 */
.consult-btn:hover {
    background-color: #f9fafb;
    border-color: #d1d5db;
}

/* 探索更多按钮样式：渐变蓝底 */
.hero-btns .explore-btn {
    background: linear-gradient(90deg, #1677ff 0%, #0958d9 100%);
    color: #ffffff;
}

/* 探索更多按钮悬浮效果 */
.hero-btns .explore-btn:hover {
    background: linear-gradient(90deg, #0958d9 0%, #0640a0 100%);
    transform: translateY(-1px);
}