* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f5f7fa;
    color: #333;
}

.container {
    flex: 1;
    padding: 30px 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 20px;
}

h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.content {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    margin-bottom: 30px;
    line-height: 1.6;
}

.content h2 {
    color: #3498db;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f1f1f1;
}

.content p {
    margin-bottom: 15px;
    font-size: 1.05rem;
}

.device-info {
    background-color: #e8f4fc;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    margin-top: 30px;
    border-left: 4px solid #3498db;
}

.device-info h3 {
    color: #2980b9;
    margin-bottom: 10px;
}

/* 底部导航菜单样式 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: white;
    box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.nav-section {
    display: flex;
    align-items: center;
}

.nav-section.center {
    flex: 1;
    justify-content: center;
}

.nav-section.right {
    justify-content: flex-end;
}

/* 普通导航链接 */
.nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #555;
    padding: 8px 15px;
    border-radius: 8px;
    transition: all 0.2s;
    margin: 0 5px;
}

.nav-link i {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.nav-link span {
    font-size: 0.85rem;
    font-weight: 500;
}

.nav-link:hover {
    background-color: #f0f7ff;
    color: #3498db;
}

.nav-link.active {
    color: #3498db;
    background-color: #e8f4fc;
}

/* 手机专属元素样式 */
.mobile-only {
    display: none;
}

/* 打电话按钮 */
.call-btn {
    background-color: #2ecc71;
    color: white;
    border: none;
    border-radius: 50px;
    padding: 12px 25px;
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 10px rgba(46, 204, 113, 0.3);
}

.call-btn i {
    margin-right: 8px;
    font-size: 1.1rem;
}

.call-btn:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(46, 204, 113, 0.4);
}

.call-btn:active {
    transform: translateY(0);
}

/* 联系电话显示 */
.phone-number {
    background-color: #f8f9fa;
    border-radius: 50px;
    padding: 10px 20px;
    font-weight: 600;
    color: #2c3e50;
    display: flex;
    align-items: center;
    border: 1px solid #eaeaea;
    margin-right: 15px;
}

.phone-number i {
    color: #3498db;
    margin-right: 8px;
}

/* 联系我们按钮 */
.contact-btn {
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 50px;
    padding: 12px 25px;
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s;
}

.contact-btn i {
    margin-right: 8px;
}

.contact-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .mobile-only {
        display: flex;
    }

    .desktop-only {
        display: none;
    }

    .nav-section.center {
        display: none;
    }

    .bottom-nav {
        padding: 12px 15px;
    }

    .phone-number {
        padding: 8px 15px;
        font-size: 0.9rem;
        margin-right: 10px;
    }

    .call-btn, .contact-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    h1 {
        font-size: 2rem;
    }

    .content {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .phone-number span {
        display: none;
    }

    .phone-number {
        padding: 10px;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        justify-content: center;
    }

    .phone-number i {
        margin-right: 0;
    }
}

/* 页面底部信息 */
footer {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-top: 30px;
}