/* ================= 全局变量与配色定义 ================= */
:root {
    --primary-color: #0056b3;     /* 屹讯主题蓝 */
    --secondary-color: #a3a4a5;   /* 辅助灰色 */
    --text-main: #2d3748;         /* 深灰色主体文字 */
    --text-muted: #718096;        /* 辅助说明文字 */
    --light-bg: #f8fafc;          /* 工业微灰底色 */
    --white: #ffffff;
    --transition-premium: all 0.4s cubic-bezier(0.16, 1, 0.3, 1); /* 高级缓动曲线 */
}

/* ================= 免费免版权现代化字体栈 ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    color: var(--text-main);
    line-height: 1.65;
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
}

.section-padding { padding: 100px 0; }
.bg-light { background-color: #ffffff/* var(--light-bg) */; }
.bg-glow {
    background-color: #ffffff;
    background-image:
        radial-gradient(ellipse 800px 600px at 85% 15%, rgba(0,86,179,0.07) 0%, transparent 70%),
        radial-gradient(ellipse 600px 700px at 10% 80%, rgba(0,86,179,0.05) 0%, transparent 70%),
        radial-gradient(ellipse 500px 400px at 50% 50%, rgba(0,86,179,0.03) 0%, transparent 70%);
    background-size: 100% 100%;
    background-position: 0 0;
    background-attachment: fixed;
}

/* ================= 渐变色带板块分隔 ================= */
/* ================= 板块交替背景色 ================= */
.section-tint {
    background-color: #eaf1f9;
    padding: 120px 0;
}
.text-center { text-align: center; }

/* 标题与按钮组合 */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 {
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #003d80 0%, #0056b3 40%, #0077e6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 3px 6px rgba(0, 86, 179, 0.2));
}
.section-header .line {
    width: 50px; height: 4px; background-color: var(--primary-color);
    margin: 18px auto 0; border-radius: 2px;
}

.btn {
    display: inline-block; padding: 12px 32px; border-radius: 6px;
    text-decoration: none; font-weight: 600; transition: var(--transition-premium); cursor: pointer;
}
.btn-primary { background-color: var(--primary-color); color: var(--white); }
.btn-primary:hover { background-color: #004494; transform: translateY(-2px); }

/* ================= 导航栏主体样式调整 ================= */
.navbar {
    border-bottom: none !important;
    box-shadow: none !important;
    width: 100% !important;
    height: 80px;             /* 给导航栏一个固定的黄金高度 */
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex !important;
    align-items: center !important;
    box-sizing: border-box;
	background-color: rgba(0, 0, 0, 0.5) !important;
    transition: background-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.navbar-container {
    width: 100% !important;
    max-width: none !important;   /* 解除最大宽度限制，实现移到最左和最右 */
    height: 100% !important;      /* 强行继承父级 80px 高度，彻底解决高度塌陷造成的绿线穿透 */
    padding: 0 50px;              /* 左右留出 50px 的精致边距 */
    display: flex !important;
    flex-direction: row !important;   
    justify-content: space-between !important; /* Logo最左，菜单最右 */
    align-items: center !important;
    box-sizing: border-box;
}

/* 核心增强：页面滚动或鼠标悬停到导航栏时 */
.navbar.scrolled,
.navbar:hover {
    background-color: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(15px); 
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05) !important;
}

/* ================= Logo 区域复合布局 ================= */
.logo {
    text-decoration: none !important;
    display: flex !important;
    flex-direction: row !important; 
    align-items: center !important;
    gap: 14px;                
    flex-shrink: 0;                
}

.logo-img {
    height: 46px !important;             
    width: auto !important;              
    object-fit: contain;
    transition: transform 0.3s ease;
}

.logo:hover .logo-img { transform: scale(1.02); }
.logo-info { display: flex !important; flex-direction: column !important; justify-content: center !important; }

.logo-text {
    color: var(--white);
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.15;
    transition: color 0.3s ease;
}

.logo-sub {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.75rem;
    margin-top: 3px;
    letter-spacing: 0.5px;
    line-height: 1;
    transition: color 0.3s ease;
}

/* 当激活滚动或悬停时，同步改变文字颜色 */
.navbar.scrolled .logo-text,
.navbar:hover .logo-text { color: var(--primary-color) !important; }
.navbar.scrolled .logo-sub,
.navbar:hover .logo-sub { color: var(--text-muted) !important; }

/* ================= 导航链接布局 ================= */
.nav-links { 
    display: flex !important; 
    flex-direction: row !important; 
    list-style: none !important; 
    height: 100% !important; 
    margin: 0 !important;
    padding: 0 !important;
    align-items: center !important;
}

.nav-links > li { 
    position: relative !important; /* 定位基准点 */
    height: 100% !important; 
    display: flex !important; 
    align-items: center !important; 
}

.nav-links > li > a {
    text-decoration: none;
    padding: 0 22px;
    font-size: 1.05rem;
    font-weight: 500;
    height: 100% !important;  /* 让A标签撑满高度，使居中和hover区域更精致 */
    display: flex;
    align-items: center;
    color: var(--white);
    transition: color 0.3s ease;
}

.navbar.scrolled .nav-links > li > a,
.navbar:hover .nav-links > li > a { color: #334155; }

.nav-links > li > a.active,
.nav-links > li:hover > a,
.navbar.scrolled .nav-links > li > a.active,
.navbar.scrolled .nav-links > li:hover > a,
.navbar:hover .nav-links > li > a.active,
.navbar:hover .nav-links > li:hover > a {
    color: var(--primary-color) !important;
}

/* 模块底部装饰短线 */
.nav-links > li > a::after {
    content: ''; 
    position: absolute; 
    bottom: 12px; 
    left: 50%; 
    width: 0; 
    height: 3px;
    background-color: var(--primary-color); 
    border-radius: 2px;
    transition: var(--transition-premium); 
    transform: translateX(-50%);
}
.nav-links > li > a.active::after,
.nav-links > li:hover > a::after {
    width: 45%;
}

/* ================= 下拉菜单样式 ================= */
.nav-links > li.dropdown {
    cursor: pointer;
    position: relative !important; /* 确保所有下拉菜单都有可靠的基准锚点 */
}

.dropdown-menu {
    position: absolute !important;
    top: 100% !important;               
    left: 50% !important; /* 默认居中对齐 */
    transform: translateX(-50%) translateY(-10px); 
    background-color: var(--white) !important;
    min-width: 160px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1) !important;
    border-top: 3px solid var(--primary-color) !important; 
    border-radius: 0 0 6px 6px;
    list-style: none !important;
    padding: 6px 0 !important;
    margin: 0 !important;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                visibility 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1100;
}

.nav-links > li.dropdown:hover .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateX(-50%) translateY(0) !important; 
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu li a {
    display: block !important;
    padding: 11px 20px !important;
    color: #475569 !important; 
    font-size: 0.95rem !important;
    font-weight: 500 !important;
    text-decoration: none !important;
    text-align: center !important;
    white-space: nowrap;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-menu li a:hover {
    background-color: #f0f7ff !important; 
    color: var(--primary-color) !important;
}

/* 1. 强力清除最后一下拉项（联系我们）通用样式的干扰，并精准向左展开 (纯CSS实现，无需改HTML) */
.nav-links > li.dropdown:last-child .dropdown-menu,
.contact-dropdown {
    /* 彻底把通用样式里的 left: 50% 拍死清空，改用绝对右对齐 */
    left: auto !important;
    right: 0 !important;
    
    /* 归零X轴(-50%)，只保留Y轴位移，防止破坏淡入动画 */
    transform: translateY(-10px) !important; 
    
    /* 保持卡片基础大小 */
    min-width: 240px !important;
    padding: 20px !important;
}

/* 配合 hover 让 Y 轴丝滑动画 */
.nav-links > li.dropdown:last-child:hover .dropdown-menu,
.nav-links > li.dropdown:hover .contact-dropdown {
    transform: translateY(0) !important; 
}

/* 2. 内部纵向卡片弹性排列 */
.contact-info-card {
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
    text-align: left !important;
}

/* 3. 文字样式及强制不换行保证美观 */
.contact-info-card p {
    font-size: 0.9rem !important;
    color: #475569 !important;
    margin: 0 !important;
    white-space: nowrap !important;
}
.address-label {
    display: inline-block !important;
    width: 3.5em;
    text-align: justify;
    text-align-last: justify;
    font-weight: 500;
}

/* ================= 轮播大图 ================= */
.hero-carousel {
    position: relative; 
    width: 100%; 
    /* 💡 放弃 16/9 的扁宽限制，改用屏幕高度百分比，PC端锁定占满屏幕高度的 93%，图片下方天然留出极大视觉空间 */
    height: 93vh; 
    min-height: 550px; /* 设定一个保底高度 */
    overflow: hidden; 
    background-color: #050b14;
    /* 下方依然留出空间 */
    /* margin-bottom: 10px; */
}
.carousel-inner { position: relative; height: 100%; width: 100%; }

.carousel-item.active { opacity: 1; z-index: 1; }

.hero-content.container {
    margin-left: 0 !important;      
    margin-right: auto !important;
    text-align: left !important;    
    width: 90% !important;          
    padding-left: 5% !important;    
    max-width: 1000px !important;    
}

.carousel-item {
    position: absolute; 
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex !important;       
    align-items: center !important; 
    justify-content: flex-start !important; 
    color: var(--white);
}

.hero-content {
    padding-left: 5%;       
    max-width: 800px;       
}

.hero-content h1 {
    font-size: 4rem; 
    font-weight: 800; 
    margin-bottom: 22px;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.35); 
    letter-spacing: 1px;
}

.hero-content p {
    font-size: 1.68rem; 
    color: #f1f5f9; 
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.carousel-indicators {
    position: absolute; bottom: 35px; left: 50%; transform: translateX(-50%);
    z-index: 10; display: flex; gap: 12px;
}
.indicator {
    width: 35px; height: 5px; background-color: rgba(255, 255, 255, 0.35);
    border-radius: 3px; cursor: pointer; transition: var(--transition-premium);
}
.indicator.active { background-color: var(--primary-color); width: 45px; }

/* ================= 淡入动画与板块排列 ================= */
.fade-up {
    opacity: 0; transform: translateY(40px);
}
.fade-up.visible {
    animation: fadeUpIn 0.85s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
}
@keyframes fadeUpIn {
    to { opacity: 1; transform: translateY(0); }
}

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text p { margin-bottom: 22px; font-size: 1.05rem; color: #4a5568; text-align: justify; }
.about-img-placeholder {
    background: linear-gradient(135deg, var(--secondary-color), #cbd5e1); color: var(--white);
    height: 380px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
}

.advantages-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 35px; }
.card {
    background: var(--white); padding: 45px 35px; border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02); text-align: center;
    border-bottom: 4px solid transparent; transition: var(--transition-premium);
}
.card:hover {
    transform: translateY(-8px); border-bottom-color: var(--primary-color);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.08);
}
.card-icon { font-size: 2.8rem; margin-bottom: 20px; }
.card h3 { color: #1a202c; margin-bottom: 15px; font-size: 1.35rem; }
.card p { color: var(--text-muted); font-size: 0.95rem; }

/* ================= 极光呼吸动画 Banner（about/solutions 共用）================= */
.aurora-hero {
    position: relative;
    background: #020617;
    color: #ffffff;
    height: 50vh;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    box-sizing: border-box;
    padding-top: 70px;
}
.aurora-wrapper {
    pointer-events: none;
    position: absolute;
    inset: 0;
    opacity: 0.7;
    -webkit-mask-image: radial-gradient(circle at 50% 50%, black 40%, transparent 100%);
    mask-image: radial-gradient(circle at 50% 50%, black 40%, transparent 100%);
}
.aurora-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: #020617;
    overflow: hidden;
}
.aurora-bg::before {
    content: "";
    position: absolute;
    inset: -50px;
    background: linear-gradient(90deg, transparent 0%, #00214d 30%, #0056b3 50%, #0091ff 70%, transparent 100%);
    background-size: 200% 100%;
    animation: aurora-breath-one 10s ease-in-out infinite alternate;
}
.aurora-bg::after {
    content: "";
    position: absolute;
    inset: -100px;
    background: linear-gradient(90deg, transparent 10%, #0056b3 35%, rgba(255,255,255,0.9) 50%, #0091ff 65%, transparent 90%);
    background-size: 300% 100%;
    animation: aurora-breath-two 6s ease-in-out infinite alternate;
    mix-blend-mode: screen;
}
@keyframes aurora-breath-one {
    0%   { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}
@keyframes aurora-breath-two {
    0%   { background-position: 100% 50%; opacity: 0.35; filter: blur(4px); }
    50%  { opacity: 0.8; }
    100% { background-position: 0% 50%; opacity: 0.95; filter: blur(0px); }
}
.aurora-hero h1 {
    font-size: 2.8rem;
    margin-bottom: 14px;
    font-weight: 700;
    letter-spacing: 4px;
    text-shadow: 0 4px 15px rgba(0,0,0,0.5);
}
.aurora-hero p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.25rem;
    letter-spacing: 1px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}
@media (max-width: 640px) {
    .aurora-hero { height: 40vh; padding-top: 100px; }
    .aurora-hero h1 { font-size: 2rem; }
}

/* ================= 页脚站点地图 ================= */
.footer {
    background-color: #0f172a; 
    color: #94a3b8; 
    border-top: 1px solid #1e293b;
    width: 100%;
}

/* 优化：微调比例——为最后一列留出 4.2fr 的超宽空间，以便容纳文字与右侧的二维码 */
.footer-sitemap {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 4.2fr; 
    gap: 30px;
    padding: 60px 0 40px;
    align-items: flex-start;
}

/* 联系我们大容器：内部改为 Flex 横向并排，使文字在左，二维码在右 */
.footer-col.footer-contact {
    border-left: 1px solid #1e293b;
    padding-left: 40px;
    display: flex !important;
    flex-direction: row !important;
    justify-content: space-between; /* 确保文字贴左，二维码贴右 */
    align-items: flex-start;
    gap: 30px;
    min-width: 460px; /* 拓宽最小安全宽度，确保文字与二维码绝对不拥挤 */
}

/* 左侧文字信息组包裹器 */
.footer-contact-text-group {
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* 对应图二：Logo 与右侧的文本完美实现横向居中并排对齐 */
.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 22px;
}

.footer-logo {
    height: 45px; 
    width: auto;
    flex-shrink: 0;
}

.footer-brand-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.footer-brand .footer-brand-text h4 {
    color: var(--white);
    font-size: 1.4rem; 
    font-weight: 700;
    margin-bottom: 2px;
    padding-bottom: 0;
    line-height: 1.2;
    white-space: nowrap; 
}

.footer-brand .footer-brand-text h4::after {
    display: none !important;
}

.footer-brand-sub {
    display: block;
    color: #64748b;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    line-height: 1;
    white-space: nowrap; 
}

.footer-contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px; 
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.footer-contact-info p {
    margin-bottom: 0;
    font-size: 1rem; 
    color: #94a3b8;
    white-space: nowrap; 
    letter-spacing: 0.5px;
}

/* --------------------------------------------------
   【全新加入】右侧二维码专属排版：竖向排列两个方块   -------------------------------------------------- */
.footer-qrcode-wrapper {
    display: flex;
    flex-direction: column; /* 核心：让两个二维码方块竖着排列 */
    gap: 16px;              /* 两个二维码之间的上下间距 */
    flex-shrink: 0;
    align-items: center;
    padding-top: 5px;       /* 顶部微调对齐 */
}

.qrcode-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;               /* 方块和下方文字的间距 */
}

/* 正方形二维码白色背景框 */
.qrcode-box {
    width: 90px;
    height: 90px;
    background-color: var(--white);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.qrcode-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 4px;
}

/* 二维码底部的细分小字标签说明 */
.qrcode-item span {
    font-size: 0.75rem;
    color: #64748b;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* -------------------------------------------------- */

/* 前四列普通站点地图导航标题与链接样式 */
.footer-col h4 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4 a {
    color: var(--white);
    text-decoration: none;
}

.footer-col h4 a:hover {
    color: var(--primary-color);
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col ul li {
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.footer-col ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-col ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom p {
    margin: 0;
}
	
.footer-icp {
    text-align: center;
    font-size: 13px;
    color: #64748b;
    margin: 15px 0;
}

.footer-icp a {
    color: inherit;
    text-decoration: none;
}

.footer-icp a:hover {
    color: inherit;
    text-decoration: none;
}
}

/* ================= 汉堡菜单按钮 ================= */
.hamburger {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1100;
    flex-shrink: 0;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 2.5px;
    background-color: var(--white);
    border-radius: 2px;
    transition: var(--transition-premium);
}

.navbar.scrolled .hamburger span,
.navbar:hover .hamburger span {
    background-color: #334155;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* ================= 桌面端强制隐藏汉堡按钮 ================= */
@media (min-width: 769px) {
    .hamburger { display: none !important; }
}

/* ================= 移动端多端完美响应式适配 ================= */
@media (max-width: 1120px) {
    .footer-sitemap {
        grid-template-columns: repeat(3, 1fr); 
        gap: 30px;
    }
    .footer-col.footer-contact {
        border-left: none;
        padding-left: 0;
        grid-column: span 3; 
        min-width: auto;
    }
}

@media (max-width: 768px) {
    /* 汉堡菜单等其他移动端样式保持原有不变... */
    .navbar { height: 64px; }
    .navbar-container { padding: 0 25px; }
    .hamburger { display: flex !important; }
    .logo-img { height: 36px; }
    .logo-text { font-size: 1.3rem; }
    .logo-sub { font-size: 0.7rem; }
    .nav-links {
        display: none !important;
        position: fixed; top: 64px; left: 0; width: 100%;
        background-color: rgba(255, 255, 255, 0.98); backdrop-filter: blur(15px);
        flex-direction: column !important; padding: 15px 0;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); max-height: calc(100vh - 64px);
        overflow-y: auto; z-index: 1099;
    }
    .nav-links.active { display: flex !important; }
    .nav-links > li { width: 100%; height: auto !important; flex-direction: column; }
    .nav-links > li > a { color: #334155 !important; padding: 14px 30px; font-size: 1rem; width: 100%; justify-content: flex-start; height: auto !important; }
    .nav-links > li > a::after { display: none; }
    
    .dropdown-menu { position: static !important; transform: none !important; opacity: 1 !important; visibility: visible !important; box-shadow: none !important; border-top: none !important; background-color: #f8fafc !important; border-radius: 0; padding: 0 !important; margin: 0 !important; max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
    .nav-links > li.dropdown:hover .dropdown-menu { transform: none !important; }
    .nav-links > li.dropdown.open .dropdown-menu { max-height: 500px; }
    
    /* 移动端取消 PC 端的右侧强制定位和位移动画 */
    .nav-links > li.dropdown:last-child .dropdown-menu,
    .contact-dropdown { 
        transform: none !important; 
        min-width: auto !important; 
        padding: 15px 30px !important; 
    }
    .nav-links > li.dropdown:last-child:hover .dropdown-menu,
    .nav-links > li.dropdown:hover .contact-dropdown {
        transform: none !important; 
    }

    .dropdown-menu li a { padding: 10px 50px !important; font-size: 0.9rem !important; text-align: left !important; }
    .contact-info-card p { white-space: normal !important; }
    .hero-content { padding-left: 5%; max-width: 90%; }
    .hero-content h1 { font-size: 2rem; margin-bottom: 14px; }
    .hero-content p { font-size: 1rem; }
    .carousel-indicators { bottom: 25px; gap: 8px; }
    .indicator { width: 25px; height: 4px; }
    .indicator.active { width: 35px; }
    .section-padding { padding: 60px 0; }
    .section-header { margin-bottom: 40px; }
    .section-header h2 { font-size: 1.6rem; }
    .about-grid { grid-template-columns: 1fr; gap: 30px; }
    .about-img-placeholder { height: 220px; order: -1; }
    .about-text p { font-size: 0.95rem; text-align: left; }
    .advantages-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 25px; }
    .card { padding: 30px 25px; }
    .card-icon { font-size: 2.2rem; margin-bottom: 14px; }
    .card h3 { font-size: 1.15rem; }

    /* 移动手机端：页脚变为单列，文字在上，二维码在下方横向平铺，非常美观 */
    .footer-sitemap {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 40px 0 20px;
    }

    .footer-col.footer-contact {
        border-left: none;
        border-top: 1px solid #1e293b;
        padding-left: 0;
        padding-top: 30px;
        flex-direction: column !important; /* 手机端改为垂直 */
        gap: 25px;
        min-width: auto;
    }
    
    .footer-qrcode-wrapper {
        flex-direction: row !important; /* 手机端二维码左右并排，省空间 */
        justify-content: center;
        width: 100%;
        gap: 40px;
    }
    
    .footer-contact-info p {
        white-space: normal; 
    }

    .footer-bottom .container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container { width: 95%; }
    .navbar-container { padding: 0 16px; }
    .hero-content h1 { font-size: 1.6rem; }
    .hero-content p { font-size: 0.9rem; }
    .section-header h2 { font-size: 1.4rem; }
    .card { padding: 25px 20px; }
    .about-img-placeholder { height: 180px; }
}

/* ===================================================
       🎯 核心产品流式滑动轮播器（完美复现三个半排版）
   =================================================== */
.product-slider-section {
    position: relative;
    padding: 90px 0;
    overflow: hidden;
}

/* 顶部两端对齐排版：标题在左，按钮在右 */
.product-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 45px;
}

.product-slider-header .header-left {
    text-align: left;
}

.product-slider-header h2 {
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #003d80 0%, #0056b3 40%, #0077e6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 3px 6px rgba(0, 86, 179, 0.2));
    margin: 0;
}

.product-slider-header .line {
    width: 50px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 14px 0 0 0; /* 靠左对齐 */
    border-radius: 2px;
}

/* 右上角按钮控制组 */
.slider-controls {
    display: flex;
    gap: 14px;
    margin-bottom: 5px;
}

/* 轮播外层主大箱：全屏宽度，左右均可露出半张卡片 */
.product-slider-outer {
    width: 100%;
    overflow: visible;
}

/* 如果页面不够 1200px 宽，自动回落弹性安全边距 */
@media (max-width: 1280px) {
    .product-slider-outer {
        padding-left: 5%;
        padding-right: 5%;
    }
    .product-slider-track {
        padding-left: 0 !important;
    }
}

/* 裁剪视窗 */
.product-slider-viewport {
    width: 100%;
    overflow: hidden;
    padding: 20px 0;
}

/* 运行长轨道：用 padding-left 对齐容器，滚动时左侧也能露出半张卡片 */
.product-slider-track {
    display: flex;
    flex-direction: row;
    gap: 28px;
    padding-left: calc((100vw - 1400px) / 2);
    transition: transform 0.35s cubic-bezier(0.215, 0.61, 0.355, 1);
    will-change: transform;
}

/* 🎯 3.5 张卡片，右侧露出半张，间距加大更透气 */
.product-slide-card {
    flex: 0 0 calc((100% - 28px * 3) / 3.5);
    background-color: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: none;
    border: 1px solid #e8e8ea;
    display: flex;
    flex-direction: column;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* 图片外箱 */
.product-img-box {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: #f8fafc;
}

/* 图片本体 */
.product-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

/* 占位兜底背景 */
.placeholder-bg {
    background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
}

/* 🎯 悬浮动效一：图片放大一点 */
.product-slide-card:hover .product-img-box img {
    transform: scale(1.08);
}

/* 底部文本信息区 */
.product-card-info {
    padding: 20px 24px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
    background: #f2f3f5;
    border-radius: 4px;
}

.product-card-info h3 {
    font-size: 1.15rem;
    color: #1a202c;
    margin-bottom: 6px;
    font-weight: 700;
}

.product-category-tag {
    display: inline-block;
    font-size: 0.78rem;
    color: #ffffff;
    background: rgba(0, 86, 179, 0.85);
    padding: 3px 10px;
    border-radius: 10px;
    font-weight: 500;
}

/* 卡片底部行：标签在左，查看详情在右 */
.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.product-card-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin-bottom: 14px;
    flex: 1;
}

/* 详情链接 */
.product-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    white-space: nowrap;
}

/* 详情链接内部的 SVG 箭头 */
.product-more-btn .arrow-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

/* 🎯 悬浮动效二：小箭头往右移一点 */
.product-slide-card:hover .product-more-btn .arrow-icon {
    transform: translateX(6px);
}

/* 控制按钮公共样式 */
.slider-arrow {
    width: 46px;
    height: 46px;
    background-color: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #475569;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    transition: all 0.3s ease;
}

.slider-arrow:hover {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: 0 8px 20px rgba(0, 86, 179, 0.2);
}

.slider-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background-color: #f1f5f9;
    color: #94a3b8;
    border-color: #e2e8f0;
    box-shadow: none;
}

/* ================= 滑动器屏幕自适应断点 ================= */
@media (max-width: 1024px) {
    .product-slide-card {
        flex: 0 0 calc((100% - 28px * 2) / 2.5);
    }
}

@media (max-width: 768px) {
    .product-slide-card {
        flex: 0 0 calc((100% - 28px * 1) / 2);
    }
}

@media (max-width: 540px) {
    .product-slider-outer { padding: 0 5%; }
    .product-slider-viewport { overflow-x: auto; scroll-snap-type: x mandatory; }
    .product-slide-card { flex: 0 0 100%; scroll-snap-align: start; }
    .slider-controls { display: none; }
}

/* ==========================================
   🎯 首页“关于公司介绍”板块（1:1等宽+实体射线闪耀版）
   ========================================== */
.about-section {
    background-color: #ffffff;
    overflow: hidden;
    position: relative;
    padding: 120px 0;
}

/* ------------------------------------------
   ------------------------------------------ */
/* 科技感英文水印 - 大号 ABOUT US 透明文字 */
.tech-light-beam {
    display: block !important;
    position: absolute;
    top: 40%;
    left: 0;
    pointer-events: none;
    z-index: 1;
}
.tech-light-beam::before {
    content: 'ABOUT US';
    font-size: 8rem;
    font-weight: 900;
    color: rgba(15, 23, 42, 0.02);
    letter-spacing: 4px;
    white-space: nowrap;
    font-family: Arial, sans-serif;
}


/* ------------------------------------------
   /* 调整宽度：文字 4 图片 6 黄金比例 */
   ------------------------------------------ */
.about-grid { 
    display: grid; 
    grid-template-columns: 4fr 6fr;
    gap: 70px; 
    align-items: center; 
    position: relative;
    z-index: 5;
}
.about-text-container { 
    text-align: left; 
}
.about-tag { 
    display: inline-block; 
    color: var(--primary-color); 
    font-size: 0.85rem; 
    font-weight: 700; 
    letter-spacing: 2.5px; 
    margin-bottom: 12px; 
}
.about-text-container h2 {
    font-size: 2.4rem;
    font-weight: 900;
    background: linear-gradient(135deg, #003d80 0%, #0056b3 40%, #0077e6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 3px 6px rgba(0, 86, 179, 0.2));
    margin: 0 0 16px 0;
    letter-spacing: -0.5px;
}
.about-text-container .title-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, #0056b3, #0077e6);
    border-radius: 2px;
    margin-bottom: 30px;
}
.about-lead { 
    font-size: 1.02rem; 
    color: #334155; 
    line-height: 1.85; 
    margin-bottom: 35px; 
    text-align: justify; 
}
.about-lead strong { 
    color: var(--primary-color); 
    font-weight: 600; 
}

/* 三大核心优势列表 */
.about-features-list { 
    display: flex; 
    flex-direction: column; 
    gap: 22px; 
    margin-bottom: 35px; 
}
.feature-item { 
    display: flex; 
    flex-direction: row; 
    align-items: flex-start; 
    gap: 18px; 
}
.feature-icon { 
    font-size: 1.3rem; 
    background-color: var(--white); 
    width: 42px; 
    height: 42px; 
    border-radius: 10px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03); 
    flex-shrink: 0; 
}
.feature-info h4 { 
    font-size: 1.1rem; 
    color: #0f172a; 
    margin-bottom: 5px; 
    font-weight: 600; 
}
.feature-info p { 
    font-size: 0.9rem; 
    color: var(--text-muted); 
    line-height: 1.55; 
    margin: 0; 
}

/* 了解更多按钮 */
.about-readmore-btn { 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    text-decoration: none; 
    color: var(--primary-color); 
    font-weight: 600; 
    font-size: 0.95rem; 
    transition: color 0.3s ease; 
}
.about-readmore-btn svg { width: 16px; height: 16px; transition: transform 0.3s ease; }
.about-readmore-btn:hover svg { transform: translateX(5px); }

/* ------------------------------------------
	   🖼️ 4:3 完美比例轮播图片盒子
   ------------------------------------------ */
.about-image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: 20px;
    overflow: hidden; 
    box-shadow: 0 20px 45px rgba(0, 54, 179, 0.05); 
    border: 1px solid rgba(255, 255, 255, 0.8); 
}
.about-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}
.about-image-container:hover img {
    transform: scale(1.08);
}

/* 移动端自适应 */

/* 大屏桌面端 (≥993px) 精细排版优化 */
@media (min-width: 993px) {
    /* --- 1. 背景网格微调 --- */
    .about-section .about-grid {
        display: grid;
        grid-template-columns: 4.2fr 5.8fr;
        gap: 65px;
        align-items: center;
    }

    /* --- 2. 标题字体加大 --- */
    .about-text-container h2 {
        font-size: 2.6rem !important;
        margin-bottom: 12px !important;
    }

    .about-lead {
        font-size: 1.1rem !important;
        line-height: 1.9 !important;
        color: #1e293b !important;
        margin-bottom: 40px !important;
    }

    /* --- 3. 核心优势列表间距增大 --- */
    .about-features-list {
        gap: 28px !important;
        margin-bottom: 40px !important;
    }

    .feature-item {
        gap: 20px !important;
    }

    .feature-icon {
        width: 46px !important;
        height: 46px !important;
        background-color: rgba(0, 86, 179, 0.05) !important;
        color: #0056b3 !important;
        border-radius: 12px !important;
        box-shadow: 0 4px 12px rgba(0, 86, 179, 0.03) !important;
    }

    .feature-info h4 {
        font-size: 1.15rem !important;
        color: #0f172a !important;
        margin-bottom: 6px !important;
    }

    .feature-info p {
        font-size: 0.95rem !important;
        line-height: 1.6 !important;
        color: #64748b !important;
    }

    /* --- 4. 底部"了解更多"按钮优化 --- */
    .about-readmore-btn {
        font-size: 1.05rem !important;
        padding: 4px 0;
        border-bottom: 2px solid transparent;
        transition: all 0.3s ease;
    }
    
/*    .about-readmore-btn:hover {
        border-bottom-color: #0056b3;
    } */
}

@media (max-width: 992px) {
    .about-section { padding: 60px 0; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-image-container { max-width: 550px; margin: 0 auto; }
    .tech-light-beam { display: none; } 
}

/* ===================================================
   🎯 核心优势板块全新科技感改版排版   =================================================== */
.core-advantages-section {
    padding: 90px 0 !important;
    background-color: #eaf1f9 !important; /* 浅蓝底色，与白色板块交替 */
    position: relative !important;
}

/* 标题完美居左，对齐设计稿风格 */
.section-title-left {
    text-align: left !important;
    margin-bottom: 50px !important;
}
.section-title-left h2 {
    font-size: 2.2rem !important;
    font-weight: 900 !important;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #003d80 0%, #0056b3 40%, #0077e6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 3px 6px rgba(0, 86, 179, 0.2));
    margin: 0 0 12px 0 !important;
}
.section-title-left .title-line {
    width: 60px !important;
    height: 3px !important;
    background: linear-gradient(to right, #0056b3, #0077e6) !important;
    border-radius: 2px !important;
}

/* 2×2 标准网格 */
.advantages-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 28px !important;
}

/* 科技感微质感卡片设计 */
.advantage-card {
    position: relative !important;
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 16px !important;
    padding: 50px 40px 45px 40px !important;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
    overflow: hidden !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    text-align: left !important;
    min-height: 260px !important;
    justify-content: center !important;
}

/* 卡片右上角淡色大数字背景，增强排版层次 */
.card-bg-number {
    position: absolute !important;
    top: -15px !important;
    right: 15px !important;
    font-size: 8rem !important;
    font-weight: 900 !important;
    color: rgba(15, 23, 42, 0.025) !important;
    user-select: none !important;
    z-index: 1 !important;
    font-family: Arial, sans-serif !important;
}

/* 精致的图标外框 */
.card-icon-wrapper {
    width: 64px !important;
    height: 64px !important;
    background: rgba(37, 99, 235, 0.06) !important;
    color: #0056b3 !important;
    border-radius: 14px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    margin-bottom: 28px !important;
    position: relative !important;
    z-index: 2 !important;
    transition: all 0.3s ease !important;
}
.card-icon-wrapper svg {
    width: 30px !important;
    height: 30px !important;
}

.advantage-card h3 {
    font-size: 1.35rem !important;
    font-weight: 700 !important;
    color: #0f172a !important;
    margin: 0 0 16px 0 !important;
    position: relative !important;
    z-index: 2 !important;
}

.advantage-card p {
    font-size: 1rem !important;
    color: #64748b !important;
    line-height: 1.75 !important;
    margin: 0 !important;
    position: relative !important;
    z-index: 2 !important;
    max-width: 420px !important;
}

/* 🎯 悬停交互动效：卡片上浮，图标高亮，边框变蓝色 */
.advantage-card:hover {
    transform: translateY(-8px) !important;
    border-color: rgba(37, 99, 235, 0.3) !important;
    box-shadow: 0 20px 35px rgba(0, 86, 179, 0.06) !important;
}
.advantage-card:hover .card-icon-wrapper {
    background: #0056b3 !important;
    color: #ffffff !important;
    transform: scale(1.05) !important;
}

/* 📱 响应式自适应 */
@media (max-width: 768px) {
    .advantages-grid { grid-template-columns: 1fr !important; gap: 20px !important; }
    .advantage-card { padding: 36px 28px !important; min-height: auto !important; }
    .card-bg-number { font-size: 6rem !important; }
    .card-icon-wrapper { width: 54px !important; height: 54px !important; margin-bottom: 20px !important; }
    .card-icon-wrapper svg { width: 26px !important; height: 26px !important; }
    .advantage-card h3 { font-size: 1.2rem !important; }
    .advantage-card p { font-size: 0.95rem !important; }
}