/* 基础样式 */
:root {
    /* 浅色主题 */
    --color-primary: #ff6600;
    --color-primary-light: #ff8533;
    --color-primary-dark: #cc5200;
    --color-secondary: #007bff;
    --color-secondary-light: #3395ff;
    --color-secondary-dark: #0056b3;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-lighter: #999999;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f5;
    --color-border: #e0e0e0;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-error: #dc3545;
}

/* 深色主题 */
[data-theme="dark"] {
    --color-primary: #ff6600;
    --color-primary-light: #ff8533;
    --color-primary-dark: #cc5200;
    --color-secondary: #007bff;
    --color-secondary-light: #3395ff;
    --color-secondary-dark: #0056b3;
    --color-text: #f0f0f0;
    --color-text-light: #cccccc;
    --color-text-lighter: #999999;
    --color-bg: #1a1a1a;
    --color-bg-alt: #2a2a2a;
    --color-border: #3a3a3a;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-error: #dc3545;
}

/* 通用样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: var(--color-secondary-light);
}

img {
    max-width: 100%;
    height: auto;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    background: none;
    border: none;
    outline: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-primary);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    color: white;
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--color-secondary-light);
    color: white;
}

.btn-outline {
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    background-color: transparent;
}

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

.btn-login, .btn-register {
    padding: 0.375rem 0.75rem;
    margin-left: 0.5rem;
}

.btn-login {
    color: var(--color-primary);
}

.btn-register {
    background-color: var(--color-primary);
    color: white;
}

.btn-register:hover {
    background-color: var(--color-primary-light);
}

/* 头部导航 */
.header {
    background-color: var(--color-bg);
    box-shadow: 0 2px 10px var(--color-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    padding: 1rem 0;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    margin-right: 0.5rem;
}

.logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.mode-toggle {
    margin-left: 1rem;
    margin-right: auto;
}

.mode-toggle button {
    background: none;
    border: none;
    color: var(--color-text-light);
    font-size: 1.2rem;
    padding: 0.25rem;
    border-radius: 50%;
    transition: all 0.3s;
}

.mode-toggle button:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-primary);
}

.main-nav {
    margin-left: auto;
}

.main-nav ul {
    display: flex;
    gap: 1.5rem;
}

.main-nav a {
    color: var(--color-text);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    display: flex;
    align-items: center;
}

.main-nav a i {
    margin-right: 0.5rem;
}

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

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

.user-actions {
    display: flex;
    align-items: center;
    margin-left: 1rem;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: 1rem;
}

/* 搜索栏 */
.search-section {
    background-color: var(--color-bg-alt);
    padding: 1rem 0;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.3s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-box button {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-text-light);
    font-size: 1rem;
    cursor: pointer;
    transition: color 0.3s;
}

.search-box button:hover {
    color: var(--color-primary);
}

/* 轮播图 */
.banner-section {
    padding: 1rem 0;
}

.banner {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1rem;
    height: 400px;
}

.banner-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s;
}

.banner-item.active {
    opacity: 1;
}

.banner-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-text-lighter);
    cursor: pointer;
    transition: background-color 0.3s;
}

.dot.active {
    background-color: var(--color-primary);
}

/* 公告栏 */
.announcement {
    background-color: var(--color-bg);
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
}

.announcement-inner {
    display: flex;
    align-items: center;
}

.announcement-label {
    background-color: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 700;
    margin-right: 1rem;
}

.announcement-content {
    flex: 1;
    overflow: hidden;
    position: relative;
    height: 24px;
}

.announcement-list {
    position: absolute;
    transition: transform 0.5s;
    width: 100%;
}

.announcement-item {
    height: 24px;
    line-height: 24px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--color-text);
}

.announcement-more {
    margin-left: 1rem;
    color: var(--color-primary);
    font-size: 0.875rem;
}

/* 功能导航卡片 */
.features-section {
    padding: 3rem 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--color-bg);
    border-radius: 8px;
    box-shadow: 0 2px 15px var(--color-shadow);
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--color-shadow);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.card p {
    color: var(--color-text-light);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
}

.card-link {
    color: var(--color-primary);
    font-weight: 500;
    display: inline-block;
    position: relative;
}

.card-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s;
}

.card-link:hover::after {
    width: 100%;
}

/* 产品推荐 */
.products-section {
    padding: 3rem 0;
    background-color: var(--color-bg-alt);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.product-card {
    background-color: var(--color-bg);
    border-radius: 8px;
    box-shadow: 0 2px 15px var(--color-shadow);
    padding: 2rem;
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--color-shadow);
}

.product-card.highlight {
    border: 2px solid var(--color-primary);
}

.product-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

.product-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.product-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.product-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-light);
}

.product-features {
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.product-features li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
}

.product-features i {
    color: var(--color-success);
    margin-right: 0.5rem;
}

.product-card .btn {
    width: 100%;
}

/* 资讯动态 */
.news-section {
    padding: 3rem 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.news-card {
    background-color: var(--color-bg);
    border-radius: 8px;
    box-shadow: 0 2px 15px var(--color-shadow);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--color-shadow);
}

.news-img {
    height: 180px;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    font-size: 0.75rem;
    color: var(--color-text-lighter);
    margin-bottom: 0.75rem;
    display: block;
}

.news-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    color: var(--color-text);
}

.news-content p {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.news-more {
    font-weight: 500;
    color: var(--color-primary);
    font-size: 0.875rem;
}

.news-more:hover {
    color: var(--color-primary-light);
}

/* 帮助中心 */
.help-section {
    padding: 3rem 0;
    background-color: var(--color-bg-alt);
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.help-card {
    background-color: var(--color-bg);
    border-radius: 8px;
    box-shadow: 0 2px 15px var(--color-shadow);
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.help-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--color-shadow);
}

.help-card i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.help-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.help-card p {
    color: var(--color-text-light);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
}

.help-card a {
    color: var(--color-primary);
    font-weight: 500;
}

.help-card a:hover {
    color: var(--color-primary-light);
}

/* 业务咨询 */
.consultation-section {
    padding: 3rem 0;
    background-color: var(--color-bg);
    text-align: center;
}

.consultation-content {
    max-width: 700px;
    margin: 0 auto;
}

.consultation-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.consultation-text {
    color: var(--color-text-light);
    margin-bottom: 2rem;
    font-size: 1.125rem;
}

.consultation-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.consultation-actions .btn {
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

/* 页脚 */
.footer {
    background-color: var(--color-bg-alt);
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo img {
    height: 40px;
    margin-bottom: 1rem;
}

.footer-logo p {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.footer-links {
    flex: 3;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-links-column {
    flex: 1;
    min-width: 150px;
}

.footer-links-column h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.footer-links-column ul li {
    margin-bottom: 0.5rem;
}

.footer-links-column ul li a {
    color: var(--color-text-light);
    font-size: 0.875rem;
    transition: color 0.3s;
}

.footer-links-column ul li a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-lighter);
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s, transform 0.3s;
    z-index: 90;
    box-shadow: 0 2px 10px var(--color-shadow);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-primary-light);
}

/* 快速客服入口 */
.quick-service {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 90;
    background-color: rgba(0, 0, 0, 0.7);
    border-radius: 10px 0 0 10px;
    padding: 10px 0;
    box-shadow: -3px 0 15px var(--color-shadow);
}

.quick-service-item {
    background-color: transparent;
    color: var(--color-primary);
    width: 60px;
    height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 5px 0;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.quick-service-item:first-child {
    border-radius: 8px 0 0 0;
}

.quick-service-item:last-child {
    border-radius: 0 0 0 8px;
}

.quick-service-item i {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.quick-service-item span {
    font-size: 12px;
    text-align: center;
    white-space: nowrap;
    transition: all 0.3s;
    color: #fff;
}

.quick-service-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-primary-light);
}

/* 登录弹窗 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-bg);
    border-radius: 8px;
    width: 90%;
    max-width: 400px;
    padding: 2rem;
    position: relative;
    box-shadow: 0 5px 20px var(--color-shadow);
    transform: translateY(-20px);
    transition: transform 0.3s;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.25rem;
    color: var(--color-text-light);
    cursor: pointer;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    text-align: center;
}

.modal-form-group {
    margin-bottom: 1.5rem;
}

.modal-form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
}

.modal-form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
}

.modal-form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.modal-footer {
    text-align: center;
    margin-top: 1.5rem;
}

.modal-footer .btn {
    width: 100%;
    padding: 0.75rem;
}

.modal-footer .modal-link {
    display: block;
    margin-top: 1rem;
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.modal-footer .modal-link a {
    color: var(--color-primary);
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .header-inner {
        flex-wrap: wrap;
    }
    
    .main-nav {
        order: 3;
        width: 100%;
        margin-top: 1rem;
    }
    
    .main-nav ul {
        justify-content: center;
    }
    
    .banner {
        height: 300px;
    }
    
    .quick-service {
        display: none;
    }
}

@media (max-width: 768px) {
    .card-grid,
    .product-grid,
    .news-grid,
    .help-grid {
        grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
    }
    
    .footer-top {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .banner {
        height: 200px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        padding: 1rem;
        box-shadow: 0 5px 10px var(--color-shadow);
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav ul li {
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }
    
    .main-nav ul li:last-child {
        border-bottom: none;
    }
    
    .main-nav ul li a {
        padding: 0.75rem 0;
        display: block;
    }
    
    .user-actions {
        margin-left: auto;
    }
}

@media (max-width: 576px) {
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .main-nav a {
        font-size: 0.875rem;
    }
    
    .main-nav a i {
        margin-right: 0.25rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.25rem;
    }
    
    .consultation-title {
        font-size: 1.5rem;
    }
    
    .consultation-text {
        font-size: 1rem;
    }
}