/* CSS 变量定义 */
:root {
    --my-blue: #0A68FF; --my-yellow: #FFC900; --my-dark: #1D2129; --my-text: #4E5969; --my-light-gray: #F7F8FA; --my-border-color: #E5E6EB;
    --bs-body-font-family: 'Roboto', 'Noto Sans SC', sans-serif;
    --bs-primary: var(--my-blue); --bs-primary-rgb: 10, 104, 255; --bs-warning: var(--my-yellow);
    --bs-body-color: var(--my-text); --bs-body-bg: #FFFFFF; --bs-link-hover-decoration: none;
    --fengrui-primary-blue: #0A2540;
    --fengrui-accent-yellow: #FFB800;
}

/* 基础样式 */
body { font-weight: 400; scroll-behavior: smooth; min-height: 100vh; display: flex; flex-direction: column; }
a, .btn, .nav-link, .navbar-brand { transition: all 0.3s ease; }

/* 导航栏样式 */
.navbar { padding: 1rem; transition: background-color 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease; }
.navbar-transparent { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.navbar-scrolled { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); padding-top: 0.5rem; padding-bottom: 0.5rem; }
.navbar .navbar-nav .nav-link { color: var(--my-dark) !important; }
.navbar .navbar-nav .nav-link:hover,
.navbar .navbar-nav .nav-link.active {
    color: var(--my-blue) !important;
}
.navbar #brand-logo-text { color: var(--my-dark) !important; }
.navbar-scrolled .navbar-nav .nav-link { color: var(--my-dark) !important; }
.navbar-scrolled .navbar-nav .nav-link:hover { color: var(--my-blue) !important; }
.navbar-scrolled #brand-logo-text { color: var(--my-dark) !important; }
.navbar-brand img { 
    transition: filter 0.4s ease; 
    width: 240px !important; 
    height: 45px !important; 
    object-fit: contain; 
    /* filter: invert(1) brightness(0.5) sepia(1) hue-rotate(190deg) saturate(5); */ 
}
/* .navbar-scrolled .navbar-brand img { filter: invert(1) brightness(0.5) sepia(1) hue-rotate(190deg) saturate(5); } */
/* 移除LOGO滤镜效果，保持原始颜色 */
.navbar .nav-link { font-size: 1rem; font-weight: 500; padding: 0.5rem 1rem !important; position: relative; }
.navbar .nav-link::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background-color: var(--my-blue); transition: width 0.3s ease; }
.navbar .nav-link:hover::after, .navbar .nav-link.active::after { width: 50%; }
.navbar .nav-link.active { color: var(--my-primary) !important; font-weight: 600; position: relative; }
.navbar .nav-link.active::after { content: ''; position: absolute; bottom: -5px; left: 50%; transform: translateX(-50%); width: 30px; height: 2px; background-color: var(--my-primary); border-radius: 1px; }
.navbar-scrolled .nav-link.active { color: var(--my-yellow) !important; }
.navbar-scrolled .nav-link.active::after { background-color: var(--my-blue); }

.dropdown { position: relative; }

/* 下拉菜单样式 */
.dropdown-menu { 
    background-color: rgba(255, 255, 255, 0.95); 
    backdrop-filter: blur(10px); 
    border: 1px solid var(--my-border-color); 
    border-radius: 8px; 
    box-shadow: 0 8px 25px rgba(0,0,0,0.15); 
    margin-top: 0;
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    min-width: 200px;
}
.navbar .dropdown:hover .dropdown-menu { display: block; }
.navbar .dropdown-menu:hover { display: block; }
.navbar .dropdown::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 10px;
    background: transparent;
    z-index: 999;
}
.navbar .dropdown:hover::before { display: block; }
.dropdown-item { 
    color: var(--my-dark); 
    font-weight: 500; 
    padding: 0.75rem 1.5rem; 
    transition: all 0.3s ease;
    display: block;
    width: 100%;
    clear: both;
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
}
.dropdown-item:hover, .dropdown-item:focus { 
    background-color: var(--my-light-gray); 
    color: var(--my-blue);
    text-decoration: none;
}
.dropdown-toggle::after { display: none; }
.navbar-toggler { border: none !important; }
.navbar-toggler:focus { box-shadow: none !important; }
.navbar-toggler .bi-list { font-size: 2rem; color: var(--my-dark); transition: color 0.4s ease; }
.navbar-scrolled .navbar-toggler .bi-list { color: var(--my-dark); }

/* 移动端底部导航栏 */
.mobile-bottom-nav { 
    background-color: #fff; 
    padding: 0.75rem 1rem; 
    border-top: 1px solid var(--my-border-color); 
    box-shadow: 0 -4px 12px rgba(0,0,0,0.05); 
    z-index: 1050; 
}
.mobile-bottom-nav .btn { font-weight: 700; border-radius: 50px; padding: 0.75rem 1.25rem; }
.mobile-bottom-nav .btn-warning { background-color: var(--my-yellow); color: var(--my-dark); border: none; }

/* 移动端响应式样式 */
@media (max-width: 991.98px) {
    .navbar-brand-centered { position: absolute; left: 50%; transform: translateX(-50%); }
    .navbar .nav-link.active::after, .navbar .nav-link:hover::after { width: 0; }
    
    /* 侧边栏菜单 (Offcanvas) */
    .offcanvas { 
        background-color: #FFFFFF; 
        --bs-offcanvas-width: clamp(260px, 75vw, 280px); 
        --bs-offcanvas-transition: transform .4s ease-in-out; 
    }
    .offcanvas-header { border-bottom: 1px solid var(--my-border-color); padding: 1rem 1.5rem; }
    .offcanvas-title { color: var(--my-dark); font-weight: 500; font-size: 1.1rem; }
    .offcanvas-header .btn-close { background-image: var(--bs-btn-close-bg); }
    .offcanvas-body { 
        padding: 0 !important; 
        display: flex; 
        flex-direction: column; 
        overflow: hidden;
        padding-bottom: 3rem !important;
    }
    .offcanvas .navbar-nav { padding: 2rem 1.5rem; flex-grow: 1; overflow-y: auto; -ms-overflow-style: none; scrollbar-width: none; }
    .offcanvas .navbar-nav::-webkit-scrollbar { display: none; }
    .offcanvas-footer-info { margin-top: auto; padding: 1.5rem; border-top: 1px solid var(--my-border-color); flex-shrink: 0; text-align: center; }
    .offcanvas .nav-item { margin-bottom: 2rem; }
    .offcanvas .nav-link { color: var(--my-dark) !important; font-size: 1.5rem; font-weight: 500; padding: 0.5rem 0 !important; position: relative; display: inline-block; width: auto; }
    .offcanvas .nav-link::after { content: ''; position: absolute; bottom: -8px; left: 0; transform: none; width: 0; height: 2px; background-color: var(--my-blue); transition: width 0.3s ease; }
    .offcanvas .nav-link:hover::after, .offcanvas .nav-link.active::after { width: 40px; }
    .offcanvas .nav-link.active { color: var(--my-yellow) !important; font-weight: 700; }
    .offcanvas-footer-info .contact-item { display: flex; align-items: center; justify-content: center; gap: 0.75rem; font-size: 0.9rem; color: var(--my-text); margin-bottom: 0.8rem; }
    
    /* 移动端子菜单样式 */
    .offcanvas .submenu { 
        list-style: none; 
        padding-left: 0; 
        margin-top: 1rem; 
        margin-bottom: 1rem; 
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }
    .offcanvas .submenu.show {
        max-height: 300px;
        transition: max-height 0.3s ease-in;
    }
    .offcanvas .submenu li { 
        margin-bottom: 1rem; 
    }
    .offcanvas .submenu-link { 
        font-size: 1.2rem !important; 
        color: var(--my-text) !important; 
        font-weight: 400 !important; 
        padding-left: 1.5rem !important; 
        position: relative; 
    }
    .offcanvas .submenu-link::before { 
        content: '•'; 
        position: absolute; 
        left: 0.5rem; 
        color: var(--my-blue); 
        font-weight: bold; 
    }
    .offcanvas .submenu-link:hover, .offcanvas .submenu-link.active { 
        color: var(--my-blue) !important; 
    }
    /* 移动端产品中心下拉图标样式 */
    .offcanvas .nav-link .bi-chevron-down {
        font-size: 1.3rem;
        margin-left: 0.5rem;
        color: var(--my-blue);
        opacity: 0.8;
        transition: transform 0.3s ease;
    }
    .offcanvas .mobile-dropdown-toggle.active .bi-chevron-down {
        transform: rotate(180deg);
    }
    .offcanvas .mobile-dropdown-toggle {
        cursor: pointer;
    }
    .offcanvas-footer-info .contact-item small { display: block; color: var(--my-dark); font-weight: 500; border-top: 1px solid var(--my-border-color); margin-top: 0.75rem; padding-top: 0.75rem; }
    .offcanvas-footer-info .company-name { 
        color: var(--fengrui-primary-blue); 
        font-weight: 400; 
        border-top: 1px solid var(--my-border-color); 
        margin-top: 0.75rem; 
        padding-top: 0.3rem; 
        font-size: 0.85rem; 
        text-align: center; 
        letter-spacing: 0.3px;
        background: linear-gradient(135deg, var(--fengrui-primary-blue), var(--my-blue));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .offcanvas-footer-info .contact-item.address-item { align-items: flex-start; }
    #back-to-top-btn { bottom: 100px; } 
}

/* 面包屑导航区域样式 */
.breadcrumb-section {
    background: linear-gradient(135deg, var(--my-blue) 0%, var(--fengrui-primary-blue) 100%);
    padding: 70px 0 30px; 
    margin-top: 76px;
    position: relative;
    overflow: hidden;
}
.breadcrumb-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}
.breadcrumb-section .container {
    position: relative;
    z-index: 2;
}
.breadcrumb {
    background: none;
    padding: 0;
    margin-bottom: 1rem;
}
.breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}
.breadcrumb-item a:hover {
    color: white;
}
.breadcrumb-item.active {
    color: white;
}
.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: rgba(255, 255, 255, 0.6);
}
.page-title {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}
@media (max-width: 768px) {
    .breadcrumb-section {
       padding: 50px 0 20px;
    }
    .page-title {
       font-size: 2rem;
    }
}
  
/* 微信二维码弹窗样式 */
#wechatModal .modal-content {
    background: rgba(255, 255, 255, 0.7);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}
#wechatModal .modal-header {
    border-bottom: none;
    padding: 1.5rem 1.5rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
#wechatModal .wechat-icon {
    font-size: 2.5rem;
    color: #07c160;
    margin-bottom: 0.75rem;
}
#wechatModal .modal-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--fengrui-primary-blue);
    text-align: center;
    width: 100%;
    margin: 0;
}
#wechatModal .btn-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    opacity: 0.9;
    transition: all 0.3s ease;
    filter: invert(1) grayscale(100%) brightness(200%);
}
#wechatModal .btn-close:hover {
    background-color: rgba(0, 0, 0, 0.35);
    opacity: 1;
    transform: rotate(90deg);
}
#wechatModal .modal-body {
    padding: 1rem 2rem 2.5rem;
    text-align: center;
}
#wechatModal .qr-container {
    position: relative;
    display: inline-block;
    padding: 8px;
    border-radius: 20px;
    margin-bottom: 1.5rem;
    background: linear-gradient(145deg, rgba(255,255,255,0.6), rgba(255,255,255,0.2));
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
#wechatModal .qr-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 20px;
    border: 2px solid transparent;
    background: conic-gradient(from 180deg at 50% 50%, #07c160, var(--my-blue), #07c160) border-box;
    -webkit-mask:
        linear-gradient(#fff 0 0) padding-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    animation: spin 3s linear infinite;
}
@keyframes spin {
    to { transform: rotate(1turn); }
}
#wechatModal .qr-placeholder {
    width: 180px;
    height: 180px;
    border-radius: 14px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    background-color: white; 
}
#wechatModal .qr-placeholder::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
}
#wechatModal .qr-placeholder:hover::after {
    left: 100%;
}
#wechatModal .qr-code-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 12px;
}
#wechatModal .scan-instruction {
    font-size: 0.95rem;
    color: #2c3e50;
    margin-bottom: 0.25rem;
    font-weight: 500;
}
#wechatModal .contact-info {
    font-size: 1rem;
    font-weight: 600;
    color: #07c160;
    margin: 0;
    letter-spacing: 1px;
    user-select: all;
}
#wechatModal.fade .modal-dialog {
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease-out;
    transform: translateY(-40px) scale(0.95);
    opacity: 0;
}
#wechatModal.show .modal-dialog {
    transform: translateY(0) scale(1);
    opacity: 1;
}
@media (max-width: 480px) {
  #wechatModal .modal-dialog {
      margin: 1rem;
      max-width: calc(100vw - 2rem);
  }
  #wechatModal .modal-body {
      padding: 0.75rem 1rem 1.5rem;
  }
  #wechatModal .qr-placeholder {
      width: 150px;
      height: 150px;
  }
}

/* 社交媒体图标悬停效果 */
.footer .d-flex a {
  color: #6c757d;
  transition: all 0.3s ease;
  padding: 8px;
  border-radius: 50%;
}
.footer .d-flex a:hover {
  color: #007bff;
  background-color: rgba(0,123,255,0.1);
  transform: translateY(-2px);
}
.footer .d-flex a[title="微信"]:hover {
  color: #07c160;
  background-color: rgba(7,193,96,0.1);
}
.footer .d-flex a[title="抖音"]:hover {
  color: #ff0050;
  background-color: rgba(255,0,80,0.1);
}
.footer .d-flex a[title="邮件"]:hover {
  color: #dc3545;
  background-color: rgba(220,53,69,0.1);
}

main {
    flex-grow: 1;
}

/* 产品展示页面样式 */
.text-brand-red {
    color: #c02327;
}

.filter-nav-large {
    gap: 10px;
}
.filter-btn {
    border: 1px solid #ddd;
    background-color: #fff;
    color: #333;
    padding: 8px 20px;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s ease-in-out;
    white-space: nowrap;
}
.filter-btn:hover {
    background-color: #f8f9fa;
    border-color: #bbb;
    color: #333;
}
.filter-btn.active {
    background-color: #c02327;
    border-color: #c02327;
    color: #fff;
}

.dropdown-item.active, .dropdown-item:active {
    color: #fff;
    background-color: #c02327;
}

.product-item {
    text-align: center;
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    border-radius: 4px;
}
.product-item:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    z-index: 10;
    background-color: #fff;
}
.product-image-container {
    position: relative;
    display: block;
    overflow: hidden;
    border-radius: 4px;
    background-color: #f8f9fa;
}
.product-image-container img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease; 
}
.product-info {
    padding-top: 0.3rem;
    margin-top: 1rem;
    border-top: 1px solid #ffc107;
}
.product-info .product-code {
    font-weight: 500;
    margin-bottom: 0.25rem;
}
.product-info .product-desc {
    color: #333;
    font-size: 0.9rem;
}

#product-tooltip {
    position: fixed;
    display: none;
    padding: 8px 12px;
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 4px;
    font-size: 0.9rem;
    z-index: 9999;
    pointer-events: none;
    white-space: nowrap;
}

/* 页脚和返回顶部按钮 */
.new-footer { background-color: var(--fengrui-primary-blue); color: rgba(255, 255, 255, 0.7); padding: 3rem 0; font-size: 0.9rem; }
.new-footer h3, .new-footer h4 { color: #fff; font-family: 'Noto Sans SC', sans-serif; font-weight: 500; }
.new-footer a { color: rgba(255, 255, 255, 0.7); text-decoration: none; transition: color 0.3s ease; }
.new-footer a:hover { color: var(--my-yellow); }
.new-footer .list-unstyled li { margin-bottom: 0.5rem; }
.new-footer .small { color: rgba(255, 255, 255, 0.7); }
.new-footer hr { border-color: rgba(255, 255, 255, 0.15); }
#back-to-top-btn { position: fixed; bottom: 25px; right: 25px; width: 50px; height: 50px; background-color: var(--fengrui-accent-yellow); color: var(--fengrui-primary-blue); border: none; border-radius: 50%; font-size: 1.5rem; display: none; align-items: center; justify-content: center; cursor: pointer; z-index: 1080; opacity: 0; visibility: hidden; transform: translateY(20px); transition: all 0.3s ease; box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
#back-to-top-btn.show { display: flex; opacity: 1; visibility: visible; transform: translateY(0); }
#back-to-top-btn:hover { background-color: var(--fengrui-primary-blue); color: var(--fengrui-accent-yellow); }
@media (max-width: 991.98px) { #back-to-top-btn { bottom: 100px; } }