/* 职星学院官网 - 公共样式 */

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色系 */
    --primary-color: #5881db;
    --primary-dark: #265bb9;
    --primary-light: #b5cafc;
    
    /* 辅助色 */
    --secondary-color: #0066cc;
    --accent-color: #143e81;
    
    /* 中性色 */
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --border-color: #e6e6e6;
    --bg-light: #f9faff;
    --bg-gradient-start: #eef4ff;
    --bg-gradient-end: #fafcff;
    
    /* 间距 */
    --container-width: 1200px;
    --header-height: 90px;
    --section-padding: 60px 20px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: #fff;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.screen-cont {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    width: 100%;
    box-sizing: border-box;
    height: var(--header-height);
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    box-sizing: border-box;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    width: 45px;
    height: 45px;
    margin-right: 12px;
}

.logo-text {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
}

/* 导航菜单 */
.nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 16px;
    padding: 10px 0;
    transition: color 0.3s;
    position: relative;
}

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

.nav .dropdown > a:hover {
    color: #ff6b00;
}

.nav a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

/* 下拉菜单 */
.nav .dropdown {
    position: relative;
    display: inline-block;
}

.nav .dropdown > a {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-primary);
    transition: color 0.3s;
}

.nav .dropdown > a:hover {
    color: #ff6b00;
}

.dropdown-arrow {
    font-size: 12px;
    transition: transform 0.3s, color 0.3s;
    display: inline-block;
}

.nav .dropdown:hover > a {
    color: #ff6b00;
}

.nav .dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
    color: #ff6b00;
}

.nav .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 160px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-radius: 4px;
    padding: 10px 0;
    display: none;
    z-index: 100;
    margin-top: 0;
}

.nav .dropdown:hover .dropdown-menu {
    display: block;
}

.nav .dropdown-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.3s;
}

    .nav .dropdown-item:hover {
        background: #f8fbff;
        color: var(--primary-color);
    }
    
    /* 移动端产品菜单 */
    .dropdown-products .products-menu {
        position: static;
        transform: none;
        width: 100%;
        max-width: 100%;
        margin-top: 10px;
        padding: 15px;
        box-shadow: none;
        border: 1px solid var(--border-color);
        border-radius: 4px;
        left: auto;
        right: auto;
        max-height: none;
    }
    
    .dropdown-products .products-content {
        padding: 0;
    }
    
    .products-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .products-column {
        margin-bottom: 15px;
    }
    
    .products-title {
        font-size: 15px;
        margin-bottom: 10px;
    }
    
    .products-item {
        font-size: 14px;
        padding: 10px;
    }
    
    .products-icon {
        font-size: 18px;
    }

.btn-contact {
    background: var(--primary-color);
    color: #fff !important;
    padding: 10px 24px !important;
    border-radius: 6px;
    font-weight: 500;
}

.btn-contact:hover {
    background: var(--primary-dark);
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 160px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-radius: 4px;
    padding: 10px 0;
    display: none;
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-item {
    padding: 10px 20px;
    color: var(--text-primary);
    text-decoration: none;
    display: block;
    transition: background 0.3s;
}

.dropdown-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

/* 产品下拉菜单 */
.dropdown-products {
    position: static;
    display: none !important; /* 暂时屏蔽产品菜单 */
}

.dropdown-products .products-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    width: 100vw;
    background: #fff;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    border-radius: 0;
    padding: 30px 0;
    display: none;
    z-index: 1000;
    margin-top: 0;
    border-top: 3px solid #ff6b00;
    animation: fadeInDown 0.3s ease-out;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
}

.dropdown-products .products-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 返回顶部按钮（在按钮组中） */
.fixed-buttons-group .back-to-top {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #5881db 0%, #7ba3f0 100%);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(88, 129, 219, 0.4);
    transition: all 0.3s;
    display: none;
    justify-content: center;
    align-items: center;
}

.fixed-buttons-group .back-to-top:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(88, 129, 219, 0.5);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-products.show .products-menu {
    display: block;
}

.products-content {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.products-column {
    display: flex;
    flex-direction: column;
}

.products-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.products-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.products-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    border-radius: 4px;
    transition: all 0.3s;
}

.products-item:hover {
    background: #f8fbff;
    color: var(--primary-color);
    transform: translateX(3px);
}

.products-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

/* 图标颜色 */
.icon-pink { color: #ff6b9d; }
.icon-yellow { color: #ffc107; }
.icon-red { color: #ff4757; }
.icon-green { color: #2ed573; }
.icon-purple { color: #a55eea; }
.icon-dark-purple { color: #8854d0; }
.icon-light-blue { color: #74b9ff; }
.icon-cyan { color: #00d2d3; }
.icon-blue { color: #5881db; }
.icon-orange { color: #ff6b00; }

/* 移动端产品菜单 */
@media (max-width: 768px) {
    .dropdown-products .products-menu {
        width: calc(100vw - 40px);
        left: 20px;
        transform: none;
        padding: 20px 15px;
    }
    
    .products-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .products-title {
        font-size: 14px;
        margin-bottom: 10px;
    }
    
    .products-item {
        font-size: 13px;
        padding: 6px 8px;
    }
    
    .products-icon {
        font-size: 16px;
        width: 20px;
    }
}

/* 演示中心按钮 */
.demo-btn {
    background: var(--primary-color);
    color: #fff;
    padding: 8px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 16px;
    transition: background 0.3s;
}

.demo-btn:hover {
    background: var(--primary-dark);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    font-size: 28px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
}

/* 底部 */
.footer {
    background: #2c3e50;
    padding: 60px 20px 20px;
    margin-top: 60px;
    color: #fff;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    gap: 60px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 600;
}

.footer-col p {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    line-height: 1.8;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-section h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
    display: flex;
    align-items: center;
}

.footer-section h3 img {
    width: 20px;
    height: 20px;
    margin-left: 8px;
}

.footer-section .logo {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.footer-section .logo-img {
    width: 45px;
    height: 45px;
    margin-right: 10px;
}

.footer-section .logo-text {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
}

.footer-desc {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    line-height: 1.8;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.contact-item img {
    width: 20px;
    height: 20px;
    margin-right: 8px;
}

.qr-code{
    padding-left: 60px;
    box-sizing: border-box;
}
.qr-code img {
    width: 120px;
    height: 120px;
    margin-top: 10px;
    background: #fff;
    padding: 10px;
    border-radius: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    color: rgba(255,255,255,0.5);
    font-size: 12px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-size: 18px;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88, 129, 219, 0.3);
}

.btn-outline {
    background: #fff;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: #fff;
}

/* 标题样式 */
.section-title {
    font-size: 28px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 10px;
    letter-spacing: 1px;
}

/* 卡片样式 */
.card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #e6f7ff;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* 滚动动画 */
.animate-section {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-section.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --section-padding: 40px 15px;
    }
    /* 容器 */
    .container {
        padding: 0 0px;
    }
    .header .container {
        padding: 0 15px;
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .logo-img {
        width: 35px;
        height: 35px;
    }
    
    .nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        gap: 0;
        z-index: 999;
    }
    
    .nav.active {
        display: flex;
    }
    
    .nav a {
        padding: 15px 0;
        border-bottom: 1px solid #f0f0f0;
        text-align: left;
        display: block;
        width: 100%;
    }
    
    .nav .dropdown {
        width: 100%;
    }
    
    .nav .dropdown > a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-weight: 500;
    }
    
    .nav .dropdown-menu {
        position: static;
        display: none;
        box-shadow: none;
        padding: 0;
        background: transparent;
        border-radius: 0;
    }
    
    .nav .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav .dropdown-products {
        display: none !important; /* 暂时屏蔽产品菜单 */
    }
    
    .nav .dropdown-products.active .products-menu {
        display: none !important; /* 暂时屏蔽产品菜单 */
    }
    
    .nav .dropdown-item {
        padding: 12px 0 12px 30px;
        font-size: 15px;
        color: var(--text-secondary);
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav .dropdown-item:hover {
        background: transparent;
        color: var(--primary-color);
    }
    
    .btn-contact {
        text-align: center;
        margin-top: 10px;
        width: 120px !important;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .qr-code {
        padding-left: 0;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .btn {
        padding: 10px 24px;
        font-size: 16px;
    }
    
    .wechat-float {
        display: none;
    }
}

/* 工具类 */
.text-center { text-align: center; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.mt-40 { margin-top: 40px; }
.flex { display: flex; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.gap-20 { gap: 20px; }


/* 演示中心模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.6);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    max-width: 800px;
    width: 90%;
    position: relative;
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 32px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #000;
}

.modal-content h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.demo-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.demo-table th,
.demo-table td {
    padding: 12px;
    text-align: center;
    border: 1px solid #ddd;
}

.demo-table th {
    background: #d9e8ff;
    color: var(--secondary-color);
    font-weight: bold;
}

.demo-table a {
    color: var(--primary-color);
    text-decoration: none;
}

.demo-table a:hover {
    text-decoration: underline;
}

.demo-tip {
    font-size: 14px;
    color: var(--primary-color);
    text-align: center;
    margin-top: 15px;
}


/* 联系我们 */
.contact-section {
    padding: 100px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    margin-bottom: -60px;
}

.contact-section h2 {
    font-size: 42px;
    margin-bottom: 15px;
}

.contact-desc {
    font-size: 18px;
    margin-bottom: 50px;
    opacity: 0.95;
}

.contact-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 80px;
    max-width: 800px;
    margin: 0 auto;
}

.qrcode {
    text-align: center;
}

.qrcode-placeholder {
    width: 200px;
    height: 200px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    color: var(--text-secondary);
    
}
.qrcode-placeholder img{
    width: 200px;
    height: 200px;
}
.contact-details {
    text-align: left;
}

.detail-item {
    margin-bottom: 20px;
    font-size: 18px;
}

.detail-item .label {
    opacity: 0.9;
    margin-right: 10px;
}

.detail-item .value {
    font-weight: 600;
}
/* 右下角微信二维码浮窗 */
.wechat-float {
    position: fixed;
    right: 20px;
    bottom: 200px;
    z-index: 1000;
    background: white;
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    text-align: center;
}

.wechat-float-title {
    font-size: 12px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.wechat-float img {
    width: 120px;
    height: 120px;
    display: block;
}

.wechat-float-phone {
    font-size: 11px;
    color: #666;
    margin-top: 6px;
}

/* 在线咨询聊天按钮 */
.chat-button {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #5881db 0%, #7ba3f0 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(88, 129, 219, 0.4);
    transition: all 0.3s;
    color: #fff;
    flex-shrink: 0;
}

.chat-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(88, 129, 219, 0.5);
}

.chat-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.chat-text {
    font-size: 11px;
    font-weight: 500;
    margin-top: -2px;
}

/* 在线咨询聊天窗口 */
.chat-window {
    position: fixed;
    right: 30px;
    bottom: 110px;
    width: 380px;
    height: 500px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    z-index: 1001;
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: slideInUp 0.3s ease-out;
}

.chat-window.show {
    display: flex;
}


@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-header {
    background: linear-gradient(135deg, #5881db 0%, #7ba3f0 100%);
    color: #fff;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-logo {
    font-size: 14px;
    font-weight: 600;
}

.chat-header-title {
    flex: 1;
    text-align: center;
    font-size: 16px;
    font-weight: 600;
}

.chat-header-right {
    display: flex;
    gap: 8px;
}

.chat-btn-close {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 20px;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background 0.3s;
}

.chat-btn-close:hover {
    background: rgba(255,255,255,0.2);
}

.chat-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    background: #f5f5f5;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-message {
    display: flex;
    gap: 10px;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #5881db;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.chat-service .message-avatar {
    background: #5881db;
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-name {
    font-size: 12px;
    color: #999;
    margin-bottom: 4px;
}

.chat-service .message-name {
    color: #5881db;
    font-weight: 600;
}

.message-text {
    background: #fff;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    word-wrap: break-word;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.chat-service .message-text {
    background: #fff;
}

.message-qrcode {
    margin-top: 8px;
}

.message-qrcode img {
    width: 120px;
    height: 120px;
    border-radius: 4px;
    border: 1px solid #eee;
    display: block;
}

.message-time {
    font-size: 11px;
    color: #999;
    margin-top: 4px;
    padding-left: 4px;
}

.chat-quick-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    padding: 12px 16px;
    background: #fff;
    border-top: 1px solid #eee;
    flex-shrink: 0;
}

.quick-btn {
    padding: 6px 12px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 16px;
    font-size: 12px;
    color: #666;
    cursor: pointer;
    transition: all 0.3s;
}

.quick-btn:hover {
    border-color: #5881db;
    color: #5881db;
    background: #f0f4ff;
}

.chat-input-area {
    padding: 12px;
    background: #fff;
    border-top: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}


.chat-input {
    flex: 1;
    border: 1px solid #ddd;
    border-radius: 20px;
    padding: 12px 16px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.chat-input:focus {
    border-color: #5881db;
}

.chat-send-btn {
    background: #5881db;
    color: #fff;
    border: none;
    border-radius: 20px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
}

.chat-send-btn:hover {
    background: #7ba3f0;
}

/* 移动端聊天窗口和按钮组 */
@media (max-width: 768px) {
    .fixed-buttons-group {
        right: 20px;
        bottom: 20px;
        gap: 12px;
    }
    
    .chat-button {
        width: 50px;
        height: 50px;
    }
    
    .chat-icon {
        font-size: 20px;
    }
    
    .chat-text {
        font-size: 10px;
    }
    
    .back-to-top {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .chat-window {
        right: 10px;
        left: 10px;
        bottom: 100px;
        width: auto;
        height: calc(100vh - 200px);
        max-height: 500px;
    }
}