/* 全局样式 */
:root {
    --primary-color: #1e50a2;
    --secondary-color: #3a7bd5;
    --accent-color: #00a0e9;
    --text-color: #333;
    --light-text: #666;
    --lighter-text: #999;
    --white: #fff;
    --light-bg: #f5f9ff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: #fff;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 30px;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

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

/* 头部导航 */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo a {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav ul {
    display: flex;
}

.nav li {
    margin: 0 15px;
}

.nav a {
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

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

.nav a:hover:after,
.nav .active a:after {
    width: 100%;
}

.login-btn a {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: 500;
}

.login-btn a:hover {
    background-color: var(--secondary-color);
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-top {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.qrcode {
    width: 120px;
    height: 120px;
    background-color: var(--white);
    padding: 10px;
    border-radius: 4px;
}

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

.copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-nav {
    display: flex;
}

.footer-nav a {
    margin: 0 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

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

.icp {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

/* 表单样式 */
.form-container {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 30px;
}

.form-container input,
.form-container textarea,
.form-container select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 16px;
    transition: var(--transition);
}

.form-container input:focus,
.form-container textarea:focus,
.form-container select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(30, 80, 162, 0.1);
}

.form-container button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    font-weight: 500;
}

.form-footer {
    text-align: center;
    margin-top: 10px;
    font-size: 14px;
    color: var(--light-text);
}

.form-footer a {
    color: var(--primary-color);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    border: none;
    background: none;
    z-index: 1002;
    position: relative;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 2px 0;
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* 移动端导航菜单 */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--white);
    z-index: 1001;
    padding-top: 80px;
    overflow-y: auto;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: none;
}

.mobile-nav.active {
    display: block !important;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    padding: 0;
    margin: 0;
    list-style: none;
    width: 100%;
    background-color: var(--white);
}

.mobile-nav li {
    border-bottom: 1px solid var(--border-color);
    width: 100%;
    background-color: var(--white);
}

.mobile-nav a {
    display: block;
    padding: 20px 30px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
    text-decoration: none;
    width: 100%;
    box-sizing: border-box;
    background-color: var(--white);
}

.mobile-nav a:hover,
.mobile-nav .active a {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

.mobile-nav .login-btn {
    margin: 30px;
    background-color: var(--white);
}

.mobile-nav .login-btn a {
    display: block;
    text-align: center;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 15px 30px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 16px;
}

.mobile-nav .login-btn a:hover {
    background-color: var(--secondary-color);
}

/* 响应式设计 */
@media (max-width: 992px) {
    
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* 移动端头部登录按钮设计方案 */
    .login-btn {
        display: flex;
        order: 2; /* 确保在汉堡菜单前显示 */
        margin-right: 15px;
    }
    
    .login-btn a {
        background-color: var(--primary-color);
        color: var(--white);
        padding: 8px 16px;
        border-radius: 20px;
        font-size: 14px;
        font-weight: 500;
        text-decoration: none;
        transition: all 0.3s ease;
        white-space: nowrap;
    }
    
    .login-btn a:hover {
        background-color: #3a7bd5;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(30, 80, 162, 0.3);
    }
    
    /* 调整头部容器布局 */
    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    /* 右侧按钮组 */
    .header-actions {
        display: flex;
        align-items: center;
        gap: 15px;
    }
    
    .mobile-nav {
        padding-top: 70px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
}

@media (max-width: 768px) {
    .header .container {
        height: 60px;
    }
    
    .logo a {
        font-size: 20px;
    }
    
    /* 移动端小屏幕优化 */
    .login-btn a {
        padding: 6px 12px;
        font-size: 13px;
        border-radius: 18px;
    }
    
    .mobile-nav {
        padding-top: 60px;
    }
    
    .mobile-nav a {
        padding: 18px 25px;
        font-size: 16px;
    }
    
    .mobile-nav .login-btn {
        margin: 25px;
    }
    
    .mobile-nav .login-btn a {
        padding: 15px 30px;
        font-size: 16px;
        border-radius: 6px;
    }
    
    .section-title h2 {
        font-size: 24px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav {
        margin: 15px 0;
    }
}

@media (max-width: 576px) {
    .header .container {
        height: 60px;
        padding: 0 15px;
    }
    
    .logo a {
        font-size: 18px;
    }
    
    /* 超小屏幕优化 */
    .login-btn a {
        padding: 5px 10px;
        font-size: 12px;
        border-radius: 16px;
    }
    
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        cursor: pointer;
        padding: 8px;
        border: none;
        background: none;
        z-index: 1002;
        position: relative;
    }
    
    .mobile-menu-toggle span {
        width: 22px;
        height: 2px;
        background-color: var(--primary-color);
        margin: 2px 0;
        transition: all 0.3s ease;
        border-radius: 2px;
    }
    
    .mobile-nav a {
        padding: 16px 20px;
        font-size: 16px;
    }
    
    .mobile-nav .login-btn {
        margin: 20px;
    }
    
    .mobile-nav .login-btn a {
        padding: 12px 25px;
        font-size: 15px;
    }
    
    .section-title h2 {
        font-size: 22px;
    }
    
    .btn {
        padding: 8px 20px;
        font-size: 14px;
    }
}