/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局样式增强 */
body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    color: #333;
    background-color: #f9f9f9;
    padding-top: 70px; /* 为固定导航栏预留空间 */
}

/* 全局容器居中样式 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏内容居中 */
.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 20px;
}

/* banner区域居中 */
.banner-content {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 20px;
}

/* 合作伙伴区域居中 */
.partner-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 应用下载区域居中 */
.app-download-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .container, .navbar-container, .banner-content, .partner-container, .app-download-container {
        max-width: 960px;
    }
}

@media (max-width: 768px) {
    .container, .navbar-container, .banner-content, .partner-container, .app-download-container {
        max-width: 100%;
        padding: 0 15px;
    }
}

/* 导航栏优化 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #e67e22; /* 更换品牌主色调为橙色 */
    letter-spacing: 1px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.logo::before {
    content: "📦";
    margin-right: 8px;
    font-size: 1.2em;
}

/* 服务卡片布局优化 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.service-item {
    padding: 35px 20px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.07);
    position: relative;
    overflow: hidden;
}

.service-item::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(0,0,0,0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-item:hover::after {
    opacity: 1;
}

/* 特性区域优化 */
.logistics-intro {
    padding: 100px 0 80px;
    background: #f8f9fa;
    position: relative;
}

.logistics-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 10px;
    background: linear-gradient(90deg, #e67e22, #f39c12);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

/* 响应式细节优化 */
@media (max-width: 768px) {
    .banner {
        padding: 90px 0 40px;
    }

    .logistics-intro {
        padding: 80px 0 60px;
    }

    h2 {
        font-size: 1.8rem;
        padding-bottom: 8px;
    }

    .feature-item {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .service-item {
        padding: 25px 15px;
    }

    .feature-icon {
        font-size: 32px;
    }

    .footer-content {
        padding: 0 15px;
    }
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #3498db;
}

/* 导航栏增强 */
.logo {
    font-size: 28px;
    font-weight: bold;
    color: #3498db;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 5px 10px;
    border-radius: 4px;
}

.nav-links a:hover {
    color: #3498db;
    background-color: rgba(52, 152, 219, 0.1);
}

/* 按钮样式增强 */
.login-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 10px 22px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 4px 6px rgba(52, 152, 219, 0.2);
}

.login-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(52, 152, 219, 0.3);
}

/* 服务项卡片增强 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.service-item {
    padding: 35px 20px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.07);
    position: relative;
    overflow: hidden;
}

.service-item::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(0,0,0,0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-item:hover::after {
    opacity: 1;
}

.service-item {
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.service-item p {
    font-weight: 500;
    color: #fff;
    font-size: 1.1rem;
    margin-top: 15px;
}

/* 特性卡片增强 */
.feature-item {
    background: #fff;
    padding: 35px;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-top: 4px solid #3498db;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
}

.feature-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
    font-size: 1.4rem;
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 20px;
    color: #3498db;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #3498db;
}

.login-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-btn:hover {
    background: #2980b9;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #2c3e50;
    transition: all 0.3s ease;
}

.sidebar {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: #fff;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    padding: 70px 20px 20px;
    display: flex;
    flex-direction: column;
}

.sidebar.active {
    right: 0;
}

.sidebar-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #2c3e50;
}

.sidebar .nav-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.sidebar .nav-links a {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.sidebar .nav-links a:hover {
    background: #e9ecef;
    color: #3498db;
    transform: translateY(-2px);
}

.sidebar .auth-buttons {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: auto;
    padding-bottom: 20px;
}

.sidebar .login-btn {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border-radius: 8px;
    background: #3498db;
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sidebar .login-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #2c3e50;
    transition: all 0.3s ease;
}

.sidebar {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: #fff;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    padding: 70px 20px 20px;
}

.sidebar.active {
    right: 0;
}

.sidebar-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #2c3e50;
}

.sidebar .nav-links {
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 30px;
}

.sidebar .nav-links a {
    width: 100%;
    text-align: center;
    padding: 15px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.sidebar .auth-buttons {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.sidebar .login-btn {
    width: 80%;
    padding: 12px 0;
    font-size: 16px;
}

/* Banner区域样式 */
.banner {
    padding: 100px 0 50px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.banner .banner-content {
    display: flex;
    justify-content: center;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 30px;
    width: 100%;
    max-width: 1200px; /* 限制最大宽度 */
}

.service-item {
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.service-item:hover {
    transform: translateY(-5px);
}

.service-item img {
    width: 100%;
    max-width: 80px;
    height: auto;
    margin-bottom: 15px;
}

.service-item p {
    font-weight: 500;
    color: #fff;
}

.green { background: #27ae60; }
.light-green { background: #2ecc71; }
.orange { background: #e67e22; }
.yellow { background: #f1c40f; }

/* 合作伙伴样式 */
.partners {
    padding: 20px 0;
    background: #fff;
}

.partner-container h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.partner-container .partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.partner-logos img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.multiply {
    font-size: 24px;
    color: #95a5a6;
}

/* 物流服务介绍样式 */
.logistics-intro {
    padding: 80px 0;
    background: #f8f9fa;
}

.logistics-intro h2 {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 30px;
    color: #2c3e50;
}

.subtitle {
    text-align: center; /* 改为居中对齐 */
    color: #7f8c8d;
    max-width: 900px;
    margin: 0 auto 60px;
    line-height: 1.8;
}

.subtitle_p{
    text-align: left;
    color: #7f8c8d;
    max-width: 90%;
    margin: 0 auto 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto; /* 居中显示 */
}

.feature-item {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 20px;
}

.feature-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

/* 下载区域样式 */
.app-download {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.app-download-container .download-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.qr-section {
    text-align: center;
}

.qr-code {
    width: 150px;
    height: 150px;
    margin-bottom: 20px;
}

.store-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.store-btn img {
    height: 40px;
    width: auto;
}

.app-preview img {
    max-width: 300px;
    width: 100%;
    height: auto;
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto; /* 居中显示 */
    width: 100%;
}

.contact-info p {
    margin-bottom: 10px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-bottom {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    margin-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .navbar .navbar-container {
        height: 70px;
        padding: 15px;
    }

    .nav-links,
    .auth-buttons {
        display: none;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-content {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .subtitle {
        text-align: left; /* 移动端恢复左对齐 */
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .partner-logos {
        flex-direction: column;
    }

    .multiply {
        display: none;
    }
}

@media (max-width: 1200px) {
    .service-grid, .features-grid, .footer-content {
        padding: 0 20px;
    }
}

@media (max-width: 1200px) {
    .service-grid, .features-grid, .footer-content {
        padding: 0 20px;
    }
}

/* 电脑端布局优化 */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px; /* 增加最大宽度，利用大屏空间 */
        padding: 0 30px;
    }

    .service-grid {
        gap: 30px;
    }

    .service-item {
        padding: 40px 30px;
    }

    .service-item img {
        max-width: 100px;
        margin-bottom: 20px;
    }

    .service-item p {
        font-size: 1.2rem;
    }

    .features-grid {
        gap: 40px;
    }

    .feature-item {
        padding: 40px;
        border-radius: 12px;
    }

    .feature-icon {
        font-size: 40px;
        margin-bottom: 25px;
    }

    .feature-item h3 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
}

/* 全局视觉增强 */
body {
    background-color: #f8f9fa;
    background-image: radial-gradient(#e0e0e0 1px, transparent 1px);
    background-size: 30px 30px;
    background-attachment: fixed;
}

/* 导航栏增强 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.navbar .container {
    display: flex;
    justify-content: center; /* 改为居中对齐 */
    align-items: center;
    height: 80px;
    position: relative;
}

.logo {
    position: absolute;
    left: 30px; /* 将logo固定在左侧 */
    font-size: 28px;
    font-weight: bold;
    color: #e67e22;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 35px; /* 增加导航项间距 */
    margin: 0 auto; /* 居中对齐 */
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 16px;
}

.auth-buttons {
    position: absolute;
    right: 30px; /* 将登录按钮固定在右侧 */
}

/* 响应式调整 - 保持移动端样式不变 */
@media (max-width: 768px) {
    .navbar .container {
        justify-content: space-between; /* 移动端恢复两端对齐 */
        padding: 0 15px;
    }

    .logo {
        position: static;
    }

    .auth-buttons {
        position: static;
    }
}
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 5px 10px;
    border-radius: 4px;
}

.nav-links a:hover {
    color: #3498db;
    background-color: rgba(52, 152, 219, 0.1);
}

/* 按钮样式增强 */
.login-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 10px 22px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 4px 6px rgba(52, 152, 219, 0.2);
}

.login-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(52, 152, 219, 0.3);
}

/* 服务项卡片增强 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.service-item {
    padding: 35px 20px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.07);
    position: relative;
    overflow: hidden;
}

.service-item::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(0,0,0,0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-item:hover::after {
    opacity: 1;
}

.service-item {
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.service-item p {
    font-weight: 500;
    color: #fff;
    font-size: 1.1rem;
    margin-top: 15px;
}

/* 特性卡片增强 */
.feature-item {
    background: #fff;
    padding: 35px;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-top: 4px solid #3498db;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
}

.feature-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
    font-size: 1.4rem;
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 20px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #3498db;
}

.login-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-btn:hover {
    background: #2980b9;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #2c3e50;
    transition: all 0.3s ease;
}

.sidebar {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: #fff;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    padding: 70px 20px 20px;
}

.sidebar.active {
    right: 0;
}

.sidebar-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #2c3e50;
}

.sidebar .nav-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.sidebar .nav-links a {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.sidebar .nav-links a:hover {
    background: #e9ecef;
    color: #3498db;
    transform: translateY(-2px);
}

.sidebar .auth-buttons {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: auto;
    padding-bottom: 20px;
}

.sidebar .login-btn {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border-radius: 8px;
    background: #3498db;
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sidebar .login-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #2c3e50;
    transition: all 0.3s ease;
}

.sidebar {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: #fff;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    padding: 70px 20px 20px;
}

.sidebar.active {
    right: 0;
}

.sidebar-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #2c3e50;
}

.sidebar .nav-links {
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 30px;
}

.sidebar .nav-links a {
    width: 100%;
    text-align: center;
    padding: 15px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.sidebar .auth-buttons {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.sidebar .login-btn {
    width: 80%;
    padding: 12px 0;
    font-size: 16px;
}

/* Banner区域样式 */
.banner {
    padding: 100px 0 50px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.service-item {
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.service-item:hover {
    transform: translateY(-5px);
}

.service-item img {
    width: 100%;
    max-width: 80px;
    height: auto;
    margin-bottom: 15px;
}

.service-item p {
    font-weight: 500;
    color: #fff;
}

.green { background: #27ae60; }
.light-green { background: #2ecc71; }
.orange { background: #e67e22; }
.yellow { background: #f1c40f; }

/* 合作伙伴样式 */
.partners {
    padding: 20px 0;
    background: #fff;
}

.partners h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.partner-logos img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.multiply {
    font-size: 24px;
    color: #95a5a6;
}

/* 物流服务介绍样式 */
.logistics-intro {
    padding: 80px 0;
    background: #f8f9fa;
}

.logistics-intro h2 {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 30px;
    color: #2c3e50;
}

.subtitle {
    text-align: center; /* 改为居中对齐 */
    color: #7f8c8d;
    max-width: 900px;
    margin: 0 auto 60px;
    line-height: 1.8;
}

.subtitle_p{
    text-align: left;
    color: #7f8c8d;
    max-width: 90%;
    margin: 0 auto 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto; /* 居中显示 */
}

.feature-item {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 20px;
}

.feature-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

/* 下载区域样式 */
.app-download {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.download-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.qr-section {
    text-align: center;
}

.qr-code {
    width: 150px;
    height: 150px;
    margin-bottom: 20px;
}

.store-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.store-btn img {
    height: 40px;
    width: auto;
}

.app-preview img {
    max-width: 300px;
    width: 100%;
    height: auto;
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto; /* 居中显示 */
    width: 100%;
}

.contact-info p {
    margin-bottom: 10px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-bottom {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    margin-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .navbar .container {
        height: 70px;
        padding: 15px;
    }

    .nav-links,
    .auth-buttons {
        display: none;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-content {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .subtitle {
        text-align: left; /* 移动端恢复左对齐 */
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .partner-logos {
        flex-direction: column;
    }

    .multiply {
        display: none;
    }
}

/* 电脑端布局优化 */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px; /* 增加最大宽度，利用大屏空间 */
        padding: 0 30px;
    }

    .service-grid {
        gap: 30px;
    }

    .service-item {
        padding: 40px 30px;
    }

    .service-item img {
        max-width: 100px;
        margin-bottom: 20px;
    }

    .service-item p {
        font-size: 1.2rem;
    }

    .features-grid {
        gap: 40px;
    }

    .feature-item {
        padding: 40px;
        border-radius: 12px;
    }

    .feature-icon {
        font-size: 40px;
        margin-bottom: 25px;
    }

    .feature-item h3 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
}

/* 全局视觉增强 */
body {
    background-color: #f8f9fa;
    background-image: radial-gradient(#e0e0e0 1px, transparent 1px);
    background-size: 30px 30px;
    background-attachment: fixed;
}

/* 导航栏增强 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.navbar .container {
    height: 80px;
}

/* Banner区域优化 */
banner {
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(245,247,250,0.9) 0%, rgba(195,207,226,0.9) 100%);
    z-index: 1;
}

banner .container {
    position: relative;
    z-index: 2;
}

/* 服务卡片增强 */
service-item {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 5px;
    background-color: rgba(255,255,255,0.5);
    transition: all 0.6s ease;
}

service-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

service-item:hover::before {
    left: 100%;
}

/* 内容区域增强 */
.logistics-intro {
    padding: 120px 0;
}

.logistics-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
}

.subtitle {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 900px;
    margin: 0 auto 80px;
    color: #555;
}

/* 页脚优化 */
.footer {
    padding: 80px 0 40px;
}

.footer-content {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
}

.footer-bottom {
    margin-top: 60px;
    padding-top: 30px;
}