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



body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f7;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e5e5;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.navbar .logo {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    text-decoration: none;
}

.site-logo {
    height: 40px;
    width: auto;
    transition: all 0.3s ease;
}

.site-logo:hover {
    opacity: 0.8;
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #0071e3;
}

.language-selector {
    align-items: center;
}

.lang-select {
    padding: 8px 12px;
    border: 1px solid #e5e5e7;
    border-radius: 8px;
    background-color: white;
    font-size: 14px;
    color: #1d1d1f;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-select:hover {
    border-color: #0071e3;
    box-shadow: 0 2px 4px rgba(0, 113, 227, 0.1);
}

.lang-select:focus {
    outline: none;
    border-color: #0071e3;
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

/* 英雄区 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #f5f5f7 0%, #e5e5e7 100%);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

/* 产品相关的背景动画元素 */

/* 电池包动画 - 代表低速二三轮车电池包 */
.hero .battery-pack {
    position: absolute;
    top: 20%;
    left: 20%;
    width: 120px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.1), rgba(0, 102, 204, 0.05));
    border-radius: 15px;
    border: 2px solid rgba(0, 102, 204, 0.2);
    animation: batteryCharge 8s ease-in-out infinite;
    z-index: 0;
}

.hero .battery-pack::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    transform: translateY(-50%);
    width: 10px;
    height: 30px;
    background: rgba(0, 102, 204, 0.2);
    border-radius: 0 5px 5px 0;
}

/* 家庭储能系统动画 */
.hero .home-storage {
    position: absolute;
    top: 60%;
    right: 20%;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(0, 204, 153, 0.1), rgba(0, 204, 153, 0.05));
    border-radius: 10px;
    border: 2px solid rgba(0, 204, 153, 0.2);
    animation: homeStoragePulse 6s ease-in-out infinite;
    z-index: 0;
}

.hero .home-storage::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 10px;
    background: rgba(0, 204, 153, 0.2);
    border-radius: 5px;
}

/* 户外储能系统动画 */
.hero .outdoor-storage {
    position: absolute;
    bottom: 20%;
    left: 30%;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(255, 165, 0, 0.1), rgba(255, 165, 0, 0.05));
    border-radius: 10px;
    border: 2px solid rgba(255, 165, 0, 0.2);
    animation: outdoorStorageFloat 7s ease-in-out infinite;
    z-index: 0;
}

/* 能量流动动画 - 连接各个产品 */
.hero .energy-stream {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero .energy-stream::before {
    content: '';
    position: absolute;
    top: 25%;
    left: 25%;
    width: 2px;
    height: 150px;
    background: linear-gradient(to bottom, rgba(0, 102, 204, 0.3), rgba(0, 204, 153, 0.3));
    animation: energyStreamFlow 4s ease-in-out infinite;
}

.hero .energy-stream::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2px;
    height: 120px;
    background: linear-gradient(to right, rgba(0, 204, 153, 0.3), rgba(255, 165, 0, 0.3));
    animation: energyStreamFlow 4s ease-in-out infinite reverse;
}

/* 能量粒子动画 */
.hero .energy-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: particleFlow 10s ease-in-out infinite;
    z-index: 0;
}

.hero .energy-particle:nth-child(1) {
    top: 30%;
    left: 25%;
    background: rgba(0, 102, 204, 0.6);
    animation-delay: 0s;
}

.hero .energy-particle:nth-child(2) {
    top: 70%;
    right: 25%;
    background: rgba(0, 204, 153, 0.6);
    animation-delay: 2s;
}

.hero .energy-particle:nth-child(3) {
    bottom: 30%;
    left: 35%;
    background: rgba(255, 165, 0, 0.6);
    animation-delay: 4s;
}

.hero .energy-particle:nth-child(4) {
    top: 40%;
    right: 30%;
    background: rgba(0, 102, 204, 0.6);
    animation-delay: 6s;
}

/* BMS管理系统动画 */
.hero .bms-system {
    position: absolute;
    top: 30%;
    right: 30%;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(153, 0, 255, 0.1), rgba(153, 0, 255, 0.05));
    border-radius: 50%;
    border: 2px solid rgba(153, 0, 255, 0.2);
    animation: bmsRotate 10s linear infinite;
    z-index: 0;
}

.hero .bms-system::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: rgba(153, 0, 255, 0.2);
    border-radius: 50%;
}

/* 动画关键帧 */

/* 电池充电动画 */
@keyframes batteryCharge {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 20px rgba(0, 102, 204, 0.1);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 30px rgba(0, 102, 204, 0.2);
    }
}

/* 家庭储能系统脉冲动画 */
@keyframes homeStoragePulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.9;
    }
}

/* 户外储能系统浮动动画 */
@keyframes outdoorStorageFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-15px) rotate(2deg);
    }
    50% {
        transform: translateY(0) rotate(0deg);
    }
    75% {
        transform: translateY(15px) rotate(-2deg);
    }
}

/* 能量流动动画 */
@keyframes energyStreamFlow {
    0% {
        opacity: 0.2;
        transform: scaleY(0.8);
    }
    50% {
        opacity: 0.6;
        transform: scaleY(1.2);
    }
    100% {
        opacity: 0.2;
        transform: scaleY(0.8);
    }
}

/* 粒子流动动画 */
@keyframes particleFlow {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 0.6;
    }
    25% {
        transform: translate(30px, -30px) scale(1.2);
        opacity: 0.9;
    }
    50% {
        transform: translate(60px, 0) scale(1);
        opacity: 0.6;
    }
    75% {
        transform: translate(30px, 30px) scale(0.8);
        opacity: 0.3;
    }
    100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.6;
    }
}

/* BMS系统旋转动画 */
@keyframes bmsRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 确保内容在动画之上 */
.hero .container {
    position: relative;
    z-index: 1;
}

/* 登录页面全局样式 */
.login-body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    height: 100vh;
    overflow: hidden;
}

/* 全屏登录布局 */
.bms-login-full {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* 左侧品牌区域 */
.login-brand-section {
    flex: 1;
    background: linear-gradient(135deg, #0071e3 0%, #0056b3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 40px;
    position: relative;
    overflow: hidden;
}

/* 品牌区域背景效果 */
.login-brand-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 50%);
}

.brand-content {
    position: relative;
    z-index: 1;
    max-width: 400px;
    text-align: center;
}

.login-logo {
    width: 120px;
    height: auto;
    margin-bottom: 30px;
    filter: brightness(0) invert(1);
}

.brand-content h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.brand-content p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* 品牌特性列表 */
.brand-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
}

.feature-item {
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
    text-align: center;
    font-size: 14px;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

/* 右侧登录区域 */
.login-form-section {
    flex: 1;
    background: linear-gradient(135deg, #f5f5f7 0%, #e5e5e7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* BMS相关动画元素 */
.bms-animation-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* 电路图案动画 */
.bms-circuit {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(to right, transparent 95%, rgba(0, 113, 227, 0.1) 95%, rgba(0, 113, 227, 0.1) 100%),
        linear-gradient(to bottom, transparent 95%, rgba(0, 113, 227, 0.1) 95%, rgba(0, 113, 227, 0.1) 100%);
    background-size: 50px 50px;
    animation: circuitMove 20s linear infinite;
}

/* 脉冲动画 */
.bms-pulse {
    position: absolute;
    top: 20%;
    right: 10%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 113, 227, 0.3) 0%, rgba(0, 113, 227, 0) 70%);
    animation: pulse 4s ease-in-out infinite;
}

/* 数据流动画 */
.bms-data-stream {
    position: absolute;
    bottom: 20%;
    left: 10%;
    width: 2px;
    height: 200px;
    background: linear-gradient(to top, rgba(0, 204, 153, 0), rgba(0, 204, 153, 0.5), rgba(0, 204, 153, 0));
    animation: dataStream 3s ease-in-out infinite;
}

/* 节点动画 */
.bms-node {
    position: absolute;
    width: 10px;
    height: 10px;
    background: rgba(0, 113, 227, 0.6);
    border-radius: 50%;
    animation: nodePulse 3s ease-in-out infinite;
}

.bms-node:nth-child(4) {
    top: 30%;
    left: 20%;
    animation-delay: 0s;
}

.bms-node:nth-child(5) {
    top: 60%;
    right: 25%;
    animation-delay: 1s;
}

.bms-node:nth-child(6) {
    bottom: 30%;
    left: 30%;
    animation-delay: 2s;
}

/* 登录容器 */
.login-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    padding: 60px;
    width: 100%;
    max-width: 450px;
    text-align: center;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
    margin: 0 40px;
}

.login-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: 15px;
}

.login-header p {
    color: #86868b;
    margin-bottom: 40px;
    font-size: 16px;
}

.login-form .form-group {
    margin-bottom: 25px;
    text-align: left;
}

/* 密码字段容器 */
.password-field {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.forgot-password {
    color: #0071e3;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #0077ed;
    text-decoration: underline;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #1d1d1f;
    font-size: 14px;
}

.login-form input {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid #e5e5e7;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f9f9f9;
}

.login-form input:focus {
    outline: none;
    border-color: #0071e3;
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
    background: white;
}

.remember-group {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.remember-group input {
    width: auto;
    margin-right: 10px;
}

.login-btn {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 113, 227, 0.3);
}

/* 登录页脚 */
.login-footer {
    margin-top: 20px;
}

.back-link {
    color: #86868b;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #0071e3;
    text-decoration: underline;
}

/* 动画关键帧 */
@keyframes circuitMove {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 50px 50px;
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.1;
    }
    100% {
        transform: scale(1);
        opacity: 0.3;
    }
}

@keyframes dataStream {
    0% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-100px);
    }
    100% {
        opacity: 0;
        transform: translateY(-200px);
    }
}

@keyframes nodePulse {
    0% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.5);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 0.6;
    }
}

/* 响应式设计 */
@media (max-width: 992px) {
    .bms-login-full {
        flex-direction: column;
    }
    
    .login-brand-section {
        flex: 0 0 40vh;
    }
    
    .login-form-section {
        flex: 1;
    }
    
    .brand-features {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }
}

@media (max-width: 768px) {
    .login-container {
        padding: 40px;
        margin: 0 20px;
    }
    
    .brand-content h1 {
        font-size: 28px;
    }
    
    .brand-content p {
        font-size: 16px;
    }
    
    .login-header h2 {
        font-size: 28px;
    }
    
    .login-form input {
        padding: 14px 18px;
    }
    
    .login-btn {
        padding: 14px;
    }
    
    .brand-features {
        grid-template-columns: 1fr;
    }
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #1d1d1f;
}

.hero p {
    font-size: 20px;
    color: #86868b;
    margin-bottom: 40px;
    max-width: 800px;
}

.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background-color: #0071e3;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #0077ed;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

/* 产品展示 */
.products {
    padding: 100px 0;
    background-color: white;
}

.products h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.product-card {
    text-align: center;
    transition: all 0.3s ease;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.product-card:nth-child(1) {
    animation-delay: 0.2s;
}

.product-card:nth-child(2) {
    animation-delay: 0.4s;
}

.product-card:nth-child(3) {
    animation-delay: 0.6s;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-card img {
    width: 100%;
    max-width: 300px;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1d1d1f;
}

.product-card p {
    color: #86868b;
    font-size: 14px;
    line-height: 1.5;
}

/* 产品动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 公司优势 */
.tech-advantage, .company-advantage {
    padding: 120px 0;
    background-color: #f8f9fa;
}

.tech-advantage h2, .company-advantage h2 {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 80px;
    color: #333;
    position: relative;
    letter-spacing: 2px;
}



.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.advantage-item {
    text-align: center;
    padding: 50px 30px;
    background-color: white;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    transition: all 0.4s ease;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid #f0f0f0;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.advantage-item:nth-child(1) {
    animation-delay: 0.1s;
}

.advantage-item:nth-child(2) {
    animation-delay: 0.2s;
}

.advantage-item:nth-child(3) {
    animation-delay: 0.3s;
}

.advantage-item:nth-child(4) {
    animation-delay: 0.4s;
}

.advantage-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: #0071e3;
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f0f7ff;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.advantage-item:hover .advantage-icon {
    background-color: #0071e3;
    transform: scale(1.1);
}

.advantage-icon img {
    width: 35px;
    height: 35px;
    transition: all 0.3s ease;
}

.advantage-item:hover .advantage-icon img {
    filter: brightness(0) invert(1);
}

.advantage-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 18px;
    color: #333;
    transition: color 0.3s ease;
    letter-spacing: 1px;
}

.advantage-item:hover h3 {
    color: #0071e3;
}

.advantage-item p {
    color: #666;
    font-size: 15px;
    line-height: 1.6;
    max-width: 260px;
    margin: 0 auto;
    transition: color 0.3s ease;
}

.advantage-item:hover p {
    color: #444;
}

/* 公司简介部分 */
.company-intro {
    padding: 100px 0;
    background-color: white;
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.intro-text h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1d1d1f;
}

.intro-text p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 20px;
    color: #333;
}

.intro-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* 发展历程部分 */
.company-history {
    padding: 100px 0;
    background-color: #f5f5f7;
}

.company-history h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background-color: #e5e5e7;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-date {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: #0071e3;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.timeline-content {
    width: 45%;
    padding: 30px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1d1d1f;
}

.timeline-content p {
    color: #86868b;
    font-size: 14px;
    line-height: 1.5;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background-color: white;
}

.about h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    color: #333;
    line-height: 1.6;
}

.about-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: #f5f5f7;
}

.contact h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info p {
    margin-bottom: 15px;
    color: #333;
    font-size: 16px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 1px solid #e5e5e7;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background-color: white;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #0071e3;
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    background-color: #1d1d1f;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.footer-logo .logo {
    color: white;
    font-size: 24px;
    text-decoration: none;
    font-weight: 600;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 40px;
}

.footer-links-section h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-links-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links-section a {
    color: #86868b;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links-section a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid #333;
}

.footer-copyright {
    font-size: 12px;
    color: #86868b;
}

.footer-copyright a {
    color: #86868b;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-copyright a:hover {
    color: white;
    text-decoration: underline;
}

.footer-links-section:last-child {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
}

.wechat-qr {
    text-align: center;
    margin-bottom: 0;
}

.wechat-qr img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    background-color: white;
    padding: 5px;
}

.wechat-qr p {
    font-size: 12px;
    color: #86868b;
    margin-top: 8px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-left: 20px;
}

.contact-details p {
    font-size: 14px;
    color: #86868b;
}

/* 公司荣誉 */
.company-honors {
    padding: 80px 0;
    background-color: #f5f5f7;
}

.company-honors h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.honors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.honor-item {
    background-color: white;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s ease;
}

.honor-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.honor-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.honor-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

/* 科技成果 */
.company-achievements {
    padding: 80px 0;
    background-color: white;
}

.company-achievements h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.achievement-item {
    background-color: #f9f9f9;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.achievement-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1d1d1f;
    padding-bottom: 15px;
    border-bottom: 2px solid #0071e3;
}

.achievement-item ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.achievement-item li {
    color: #333;
    font-size: 14px;
    line-height: 1.5;
    position: relative;
    padding-left: 20px;
}

.achievement-item li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #0071e3;
    font-weight: bold;
}

/* 二维码悬停效果 */
.qr-hover-item {
    position: relative;
    cursor: pointer;
}

.qr-trigger {
    color: #86868b;
    font-size: 14px;
    transition: color 0.3s ease;
}

.qr-hover-item:hover .qr-trigger {
    color: white;
}

.qr-popup {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 10px;
    padding: 10px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.qr-popup img {
    width: 150px;
    height: 150px;
    border-radius: 4px;
    display: block;
}

.qr-hover-item:hover .qr-popup {
    opacity: 1;
    visibility: visible;
}

.footer-admin a {
    color: #86868b;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-admin a:hover {
    color: white;
}

/* 页面标题 */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #f5f5f7 0%, #e5e5e7 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.page-header p {
    font-size: 18px;
    color: #86868b;
}

/* 产品分类 */
.product-categories {
    padding: 40px 0;
    background-color: white;
    border-bottom: 1px solid #e5e5e7;
}

.categories-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.category-tab {
    padding: 10px 30px;
    background-color: #f5f5f7;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-tab:hover {
    background-color: #e5e5e7;
}

.category-tab.active {
    background-color: #0071e3;
    color: white;
}

/* 产品列表 */
.product-list {
    padding: 60px 0;
    background-color: white;
}

.product-card {
    text-align: center;
    transition: all 0.3s ease;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.product-card img {
    width: 100%;
    max-width: 300px;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.product-card p {
    color: #86868b;
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 20px;
}

.product-features {
    margin-bottom: 25px;
}

.product-features ul {
    list-style: none;
    text-align: left;
}

.product-features li {
    padding: 8px 0;
    font-size: 14px;
    color: #333;
    position: relative;
    padding-left: 20px;
}

.product-features li:before {
    content: "•";
    color: #0071e3;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 联系信息 */
.contact-info-section {
    padding: 60px 0;
    background-color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h2,
.contact-form h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1d1d1f;
}

.info-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    align-items: flex-start;
}

.info-icon {
    font-size: 24px;
    color: #0071e3;
    min-width: 30px;
}

.info-text h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
    color: #1d1d1f;
}

.info-text p {
    color: #86868b;
    font-size: 14px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group textarea {
    padding: 12px 15px;
    border: 1px solid #e5e5e7;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background-color: #f9f9f9;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0071e3;
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
    background-color: white;
}

/* 地图 */
.map-section {
    padding: 60px 0;
    background-color: #f5f5f7;
}

.map-section h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1d1d1f;
    text-align: center;
}

.map-container {
    height: 400px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.map-placeholder {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f0f0f0;
    color: #86868b;
    font-size: 16px;
}

/* 公司文化 */
.company-culture {
    padding: 60px 0;
    background-color: #f5f5f7;
}

.company-culture h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #1d1d1f;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.culture-item {
    text-align: center;
    padding: 30px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.culture-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.culture-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.culture-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.culture-item p {
    color: #86868b;
    font-size: 14px;
    line-height: 1.5;
}

/* 招聘职位 */
.job-listings {
    padding: 60px 0;
    background-color: white;
}

.job-listings h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #1d1d1f;
}

.job-categories {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.job-category-btn {
    padding: 10px 30px;
    background-color: #f5f5f7;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    cursor: pointer;
    transition: all 0.3s ease;
}

.job-category-btn:hover {
    background-color: #e5e5e7;
}

.job-category-btn.active {
    background-color: #0071e3;
    color: white;
}

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

.job-card {
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.job-card .btn-primary {
    margin-top: auto;
    align-self: flex-start;
}

.job-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.job-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.job-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    font-size: 14px;
    color: #86868b;
}

.job-description {
    margin-bottom: 20px;
    color: #333;
    font-size: 14px;
    line-height: 1.5;
}

/* 加入我们的联系信息 */
.contact-section {
    padding: 60px 0;
    background-color: white;
    text-align: center;
}

.contact-section h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1d1d1f;
}

.contact-section .contact-info p {
    margin-bottom: 10px;
    color: #333;
    font-size: 16px;
}

.contact-section .contact-info p:first-child {
    font-size: 18px;
    font-weight: 500;
    color: #0071e3;
}

/* 加入我们的优势 */
.join-advantages {
    padding: 60px 0;
    background-color: #f5f5f7;
}

.join-advantages h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #1d1d1f;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

/* 合作理念 */
.cooperation-philosophy {
    padding: 60px 0;
    background-color: white;
    text-align: center;
}

.cooperation-philosophy h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1d1d1f;
}

.cooperation-philosophy p {
    max-width: 800px;
    margin: 0 auto;
    color: #86868b;
    font-size: 16px;
    line-height: 1.6;
}

/* 合作伙伴展示 */
.partners-showcase {
    padding: 60px 0;
    background-color: #f5f5f7;
}

.partners-showcase h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #1d1d1f;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.partner-card {
    text-align: center;
    padding: 30px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.partner-logo {
    margin-bottom: 20px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
}

.partner-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1d1d1f;
}

.partner-card p {
    color: #86868b;
    font-size: 14px;
}

/* 合作模式 */
.cooperation-models {
    padding: 60px 0;
    background-color: white;
}

.cooperation-models h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #1d1d1f;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.model-card {
    text-align: center;
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.model-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.model-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.model-card p {
    color: #86868b;
    font-size: 14px;
    line-height: 1.5;
}

/* 寻求合作 */
.partnership-contact {
    padding: 60px 0;
    background: linear-gradient(135deg, #0071e3 0%, #0056b3 100%);
    color: white;
    text-align: center;
}

.partnership-contact h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 15px;
}

.partnership-contact p {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.partnership-contact .btn-primary {
    background-color: white;
    color: #0071e3;
}

.partnership-contact .btn-primary:hover {
    background-color: #f5f5f5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

/* 下载分类 */
.download-categories {
    padding: 40px 0;
    background-color: white;
    border-bottom: 1px solid #e5e5e7;
}

/* 下载列表 */
.download-list {
    padding: 60px 0;
    background-color: white;
}

.download-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.download-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.download-icon {
    font-size: 48px;
    margin-right: 20px;
    min-width: 60px;
    text-align: center;
}

.download-info {
    flex: 1;
}

.download-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1d1d1f;
}

.download-info p {
    color: #86868b;
    font-size: 14px;
    margin-bottom: 10px;
    line-height: 1.4;
}

.download-meta {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: #86868b;
}

.download-btn {
    padding: 10px 20px;
    background-color: #0071e3;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.download-btn:hover {
    background-color: #0077ed;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

/* 文章分类 */
.article-categories {
    padding: 40px 0;
    background-color: white;
    border-bottom: 1px solid #e5e5e7;
}

/* 文章列表 */
.article-list {
    padding: 60px 0;
    background-color: white;
}

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

.article-card {
    background-color: #f9f9f9;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.article-image {
    height: 200px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-content {
    padding: 20px;
}

.article-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 12px;
    color: #86868b;
}

.article-date {
    flex: 1;
}

.article-category {
    background-color: #e5e5e7;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 11px;
}

.article-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1d1d1f;
}

.article-content p {
    color: #86868b;
    font-size: 14px;
    margin-bottom: 15px;
    line-height: 1.5;
}

.read-more {
    display: inline-block;
    color: #0071e3;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: #0077ed;
    text-decoration: underline;
}

/* SN码查询 */
.sn-query {
    padding: 60px 0;
    background-color: white;
}

.query-form {
    max-width: 600px;
    margin: 0 auto 60px;
    padding: 40px;
    background-color: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.query-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.query-result {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px;
    background-color: #f0f8ff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border-left: 4px solid #0071e3;
}

.query-result h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1d1d1f;
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.result-item {
    display: flex;
    gap: 10px;
}

.result-item span:first-child {
    font-weight: 600;
    color: #333;
    min-width: 120px;
}

.result-item span:last-child {
    color: #666;
}

/* 使用说明 */
.usage-guide {
    padding: 60px 0;
    background-color: #f5f5f7;
}

.usage-guide h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #1d1d1f;
}

.guide-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.guide-content p {
    margin-bottom: 30px;
    color: #86868b;
    font-size: 16px;
    line-height: 1.6;
}

.guide-content ul {
    list-style: none;
    display: inline-block;
    text-align: left;
}

.guide-content li {
    padding: 10px 0;
    color: #333;
    position: relative;
    padding-left: 25px;
}

.guide-content li:before {
    content: "•";
    color: #0071e3;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* BMS管理系统 */
.bms-intro {
    padding: 80px 0;
    background-color: white;
}

.bms-content {
    display: flex;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
}

.bms-image {
    flex: 1;
    min-width: 300px;
}

.bms-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.bms-text {
    flex: 1;
    min-width: 300px;
}

.bms-text h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1d1d1f;
}

.bms-text p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 30px;
    color: #86868b;
}

.bms-text ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.bms-text li {
    position: relative;
    padding-left: 30px;
    font-size: 14px;
    color: #333;
}

.bms-text li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #0071e3;
    font-weight: bold;
}

.bms-features {
    padding: 80px 0;
    background-color: #f5f5f7;
}

.bms-features h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

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

.feature-card {
    background-color: white;
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.feature-card p {
    font-size: 14px;
    line-height: 1.5;
    color: #86868b;
}

.bms-applications {
    padding: 80px 0;
    background-color: white;
}

.bms-applications h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

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

.application-card {
    background-color: #f9f9f9;
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.application-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.application-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.application-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1d1d1f;
}

.application-card p {
    font-size: 14px;
    line-height: 1.5;
    color: #86868b;
}

.bms-specs {
    padding: 80px 0;
    background-color: #f5f5f7;
}

.bms-specs h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1d1d1f;
}

.specs-table {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.specs-table table {
    width: 100%;
    border-collapse: collapse;
}

.specs-table th,
.specs-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid #e5e5e7;
}

.specs-table th {
    background-color: #f5f5f7;
    font-weight: 600;
    color: #1d1d1f;
}

.specs-table tr:last-child td {
    border-bottom: none;
}

.specs-table tr:hover {
    background-color: #f9f9f9;
}

/* 404页面样式 */
.error-404 {
    padding: 80px 0;
    text-align: center;
}

.error-404 h1 {
    font-size: 120px;
    color: #333;
    margin: 0;
}

.error-404 h2 {
    font-size: 36px;
    color: #333;
    margin: 20px 0;
}

.error-404 p {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
}

/* 站点地图样式 */
.sitemap {
    padding: 40px 0;
}

.sitemap-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.sitemap-section h2 {
    font-size: 20px;
    color: #333;
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.sitemap-section ul {
    list-style: none;
    padding: 0;
}

.sitemap-section ul li {
    margin-bottom: 10px;
}

.sitemap-section ul li a {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.sitemap-section ul li a:hover {
    color: #0071e3;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 10px;
        padding: 10px 20px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links li {
        margin: 0 10px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 18px;
    }

    .about-content,
    .contact-content,
    .intro-content {
        grid-template-columns: 1fr;
    }

    .product-grid,
    .advantage-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .download-card {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }
    
    .download-icon {
        margin-bottom: 15px;
        margin-right: 0;
    }
    
    .download-btn {
        align-self: flex-start;
        margin-top: 15px;
    }

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

    .error-404 h1 {
        font-size: 80px;
    }

    .error-404 h2 {
        font-size: 24px;
    }
    
    /* 发展历程响应式 */
    .timeline::before {
        left: 20px;
    }
    
    .timeline-date {
        left: 20px;
        transform: none;
        margin-left: 10px;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    .products h2,
    .tech-advantage h2,
    .about h2,
    .contact h2 {
        font-size: 28px;
    }

    .container {
        padding: 0 15px;
    }

    .error-404 h1 {
        font-size: 60px;
    }

    .error-404 h2 {
        font-size: 20px;
    }

    .error-404 p {
        font-size: 14px;
    }
}

/* 文章详情页样式 */
.article-detail {
    padding: 100px 0;
    background-color: #fff;
}

.article-meta {
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
    color: #999;
    font-size: 14px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.article-date,
.article-category {
    font-weight: 500;
    letter-spacing: 0.5px;
}

.article-content {
    max-width: 900px;
    margin: 0 auto;
}

.article-content h2 {
    font-size: 36px;
    margin-bottom: 50px;
    color: #1d1d1f;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.article-content h3 {
    font-size: 26px;
    margin: 50px 0 25px;
    color: #1d1d1f;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: -0.3px;
}

.article-content p {
    margin-bottom: 28px;
    line-height: 1.9;
    color: #424245;
    font-size: 17px;
    text-align: justify;
    font-weight: 400;
}

.article-nav {
    margin-top: 80px;
    display: flex;
    justify-content: center;
    padding-top: 40px;
    border-top: 1px solid #f0f0f0;
}

.article-nav a {
    padding: 16px 40px;
    border-radius: 6px;
    font-size: 15px;
    transition: all 0.3s ease;
    background-color: #f5f5f7;
    color: #1d1d1f;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.article-nav a:hover {
    background-color: #0071e3;
    color: #fff;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .article-detail {
        padding: 60px 0;
    }
    
    .article-content {
        padding: 0 20px;
    }
    
    .article-content h2 {
        font-size: 28px;
    }
    
    .article-content h3 {
        font-size: 22px;
    }
    
    .article-content p {
        font-size: 16px;
        line-height: 1.8;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
}