@charset "utf-8";
@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";

:root {
    --primary-blue: #0056b3;
    --hover-blue: #004085;
    --text-dark: #111;
    --text-gray: #555;
    --white: #ffffff;
    --top-bar-bg: #f8f9fa;
    --border: #eeeeee;
    --max-width: 1480px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

a,
a:link,
a:visited,
a:hover,
a:active {
    color: inherit;
    text-decoration: none;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    background: #fff;
    overflow-x: hidden;
}

/* --- 1. Top Bar 桌面样式 --- */
.top-bar {
    background: var(--top-bar-bg);
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-gray);
}

.top-bar-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 24px;
}

.top-left,
.top-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: inherit;
}

.lang-select {
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-gray);
    font-size: 14px;
}

/* --- 2. Header (1480px) --- */
header {
    background: var(--white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 2000;
}

.nav-wrapper {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 85px;
}

.navbar-brand {
    padding-top: .625rem;
    padding-bottom: .625rem;
}

.logo img {
    height: 3rem;
}

@media screen and (max-width: 768px) {
    .nav-wrapper {
        height: 50px;
    }

    .navbar-brand {
        height: 3.125rem;
    }

    .logo img {
        height: 1.875rem;
    }
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--bg-light);
    text-decoration: none;
    display: flex;
    align-items: center;
}

/* Desktop Menu */
.desktop-menu {
    display: flex;
    list-style: none;
    height: 100%;
}

.nav-item {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 18px;
    padding: 0 22px;
    height: 100%;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-blue);
}

@media screen and (max-width: 768px) {
    .nav-link {
        padding: 0 0px;
    }
}

/* ===== 下拉菜单 优化：宽度自适应 ===== */
.dropdown,
.sub-dropdown {
    position: absolute;
    background: #fff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: var(--transition);
    list-style: none;

    /* 优化点：宽度自适应 */
    min-width: max-content;      /* 宽度由最宽项决定 */
    max-width: 320px;            /* 限制最大宽度，避免过长 */
    width: auto;                 /* 宽度自适应 */
    white-space: normal;         /* 允许换行 */
    word-break: break-word;      /* 长单词断行 */
}

.dropdown {
    top: 100%;
    left: 0;
    border-top: 4px solid var(--primary-blue);
}

.sub-dropdown {
    top: 0;
    left: 100%;
    border-top: none;
    border-left: 4px solid var(--primary-blue);
}

.nav-item:hover>.dropdown,
.has-sub:hover>.sub-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translate(0);
}

.dropdown li a,
.sub-dropdown li a {
    display: flex;
    justify-content: space-between;
    padding: 12px 20px;
    text-decoration: none;
    color: var(--text-gray);
    font-size: 15px;
    border-bottom: 1px solid #f9f9f9;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* 悬停效果：只改变背景和文字颜色，保持内边距不变，避免宽度抖动 */



/* 当鼠标悬停在含有子菜单的列表项时 */
.desktop-menu .dropdown li.has-sub:hover {
    background-color: #f0f7ff;
    color: var(--primary-blue);
}

/* 确保悬停时链接文字也变色 */
.desktop-menu .dropdown li.has-sub:hover > a {
    color: var(--primary-blue);
}



/* 二级菜单左边框悬停时变亮 */
.has-sub:hover>.sub-dropdown {
    border-left-color: var(--hover-blue);
}

.btn-inquiry {
    background: var(--primary-blue);
    color: #fff;
    padding: 12px 26px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    transition: 0.3s;
    display: inline-block;
}

/* --- 3. Mobile Full-Width Drawer --- */
.mobile-toggle {
    display: none;
    font-size: 32px;
    cursor: pointer;
    color: var(--primary-blue);
}

.mobile-drawer {
    position: fixed;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: #fff;
    z-index: 3000;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.mobile-drawer.active {
    left: 0;
}

.drawer-header {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

@media screen and (max-width: 768px) {
    .drawer-header {
        padding: 0px 24px;
    }
}

.drawer-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.drawer-body {
    flex: 1;
    overflow-y: auto;
}

.m-link {
    display: flex;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 19px;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-dark);
    border-bottom: 1px solid #f5f5f5;
}

@media screen and (max-width: 768px) {
    .m-link {
        padding: 10px 24px;
    }
}

.m-sub {
    display: none;
    background: #fafafa;
}

.m-sub .m-link {
    padding-left: 44px;
    font-size: 17px;
    color: var(--text-gray);
}

.close-btn {
    font-size: 40px;
    cursor: pointer;
    color: #999;
    line-height: 1;
}

/* --- 4. Slider --- */
.slider {
    position: relative;
    height: 750px;
    background: #000;
    overflow: hidden;
}

.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: 1.2s;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
}

.slide.active {
    opacity: 1;
    z-index: 10;
}

.slide::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
}

.slide-content {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    padding: 0 24px;
    position: relative;
    z-index: 20;
    color: #fff;
}

.slide-content h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.slide-content p {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    max-width: 650px;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.slide-content li {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    max-width: 650px;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Controls */
.arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 30;
    border-radius: 50%;
    backdrop-filter: blur(8px);
}

.arrow:hover {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgb(0 35 221 / 80%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 30;
    border-radius: 50%;
    backdrop-filter: blur(8px);
}

.prev {
    left: 30px;
}

.next {
    right: 30px;
}

.dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 30;
}

.dot {
    width: 12px;
    height: 12px;
    border: 2px solid #fff;
    border-radius: 50%;
    cursor: pointer;
    transition: 0.4s;
}

.dot.active {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    width: 35px;
    border-radius: 10px;
}

/* --- 5. 移动端优化 (≤1480px) --- */
@media (max-width: 1480px) {

    /* 顶部栏固定，渐变蓝背景，只显示第一个电话项 */
    .top-bar {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background: linear-gradient(135deg, var(--primary-blue), #003d99);
        color: #fff;
        border-bottom: none;
        z-index: 2100;
        height: 44px;
        display: flex;
        align-items: center;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    }

    .top-bar-container {
        justify-content: center;
        padding: 0 20px;
        height: 100%;
    }

    .top-right,
    .contact-item:not(:first-child) {
        display: none !important;
    }

    /* 第一个联系项（电话）样式：隐藏默认图标，显示 WhatsApp 图标 */
    .contact-item:first-child {
        color: #fff !important;
        font-weight: 700;
        font-size: 15px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .contact-item:first-child .icon {
        display: none;
        /* 隐藏默认电话图标 */
    }

    .contact-item:first-child::before {
        content: "";
        display: inline-block;
        width: 20px;
        height: 20px;
        background-color: #fff;
        mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M380.9 97.1C339 55.1 283.2 32 223.9 32c-122.4 0-222 99.6-222 222 0 39.1 10.2 77.3 29.6 111L0 480l117.7-30.9c32.4 17.7 68.9 27 106.1 27h.1c122.3 0 224.1-99.6 224.1-222 0-59.3-25.2-115-67.1-157zm-157 341.6c-33.1 0-65.6-8.9-94-25.7l-6.7-4-69.8 18.3L72 359.2l-4.4-7c-18.5-29.4-28.2-63.3-28.2-98.2 0-101.7 82.8-184.5 184.6-184.5 49.3 0 95.6 19.2 130.4 54.1 34.8 34.9 56.2 81.2 56.1 130.5 0 101.8-84.9 184.6-186.6 184.6z"/></svg>') no-repeat center;
        mask-size: contain;
        -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M380.9 97.1C339 55.1 283.2 32 223.9 32c-122.4 0-222 99.6-222 222 0 39.1 10.2 77.3 29.6 111L0 480l117.7-30.9c32.4 17.7 68.9 27 106.1 27h.1c122.3 0 224.1-99.6 224.1-222 0-59.3-25.2-115-67.1-157zm-157 341.6c-33.1 0-65.6-8.9-94-25.7l-6.7-4-69.8 18.3L72 359.2l-4.4-7c-18.5-29.4-28.2-63.3-28.2-98.2 0-101.7 82.8-184.5 184.6-184.5 49.3 0 95.6 19.2 130.4 54.1 34.8 34.9 56.2 81.2 56.1 130.5 0 101.8-84.9 184.6-186.6 184.6z"/></svg>') no-repeat center;
        -webkit-mask-size: contain;
    }

    /* 调整 header 位置，紧贴顶部栏下方，并添加margin-top避免被遮挡 */
    header {
        top: 44px;
        margin-top: 44px;
        /* 新增：使 header 从顶部栏下方开始，防止被固定栏覆盖 */
    }

    /* 原有移动端规则保持不变 */
    .desktop-menu {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    header .btn-inquiry {
        display: none;
    }

    .slider {
        height: 550px;
    }

    .arrow {
        display: none;
    }
}



/* 确保父级 li 是弹性布局 */
.desktop-menu .has-sub {
    display: flex;
    justify-content: space-between; /* 拉开左右距离 */
    align-items: center;           /* 垂直居中 */
    width: 100%;                   /* 确保占据全宽 */
}

/* 链接样式 */
.desktop-menu .has-sub a {
    flex-grow: 1;                  /* 让链接占据剩余空间 */
    text-decoration: none;
}

/* 箭头样式 */
.desktop-menu .has-sub span {
    margin-left: 10px;             /* 与文字保持一点间距 */
	margin-right: 10px;
                
}