/* 全局样式重置与基础配置 */
:root {
    --primary-color: #0d6efd;
    --primary-light: #e7f1ff;
    --primary-dark: #0a58ca;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition-base: all 0.3s ease;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 50%;
}

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

body {
    background-color: #f5f7fa;
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
    font-size: 0.9375rem;
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 0;
    margin: 0;
}

/* 登录容器样式 */
.login-container {
    min-height: calc(100vh - 100px); /* 减去导航栏高度 */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    margin-bottom: 80px;
}

/* 登录卡片样式 */
.login-card {
    background-color: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow-hover);
    overflow: hidden;
    max-width: 480px;
    width: 100%;
    transition: var(--transition-base);
}

.login-card:hover {
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.15);
}

.login-card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 2rem;
    text-align: center;
}

.login-card-header .logo {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.login-card-header h3 {
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-card-header p {
    opacity: 0.9;
    margin: 0;
}

.login-card-body {
    padding: 2rem;
}

/* 表单控件样式 */
.form-control-custom {
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    transition: var(--transition-base);
    background-color: #fff;
}

.form-control-custom:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.1);
}

.form-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* 密码输入组样式 */
.password-input-group {
    position: relative;
}

.password-toggle-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--secondary-color);
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 按钮样式 */
.btn-custom {
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    padding: 0.75rem 1.5rem;
    transition: var(--transition-base);
    font-weight: 500;
    border: none;
    width: 100%;
}

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

.btn-primary.btn-custom:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

/* 记住我和忘记密码 */
.login-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.form-check-label {
    color: var(--secondary-color);
    cursor: pointer;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-base);
}

.forgot-password:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/* 分隔线样式 */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid #e0e0e0;
}

.divider span {
    padding: 0 1rem;
    color: var(--secondary-color);
    font-size: 0.875rem;
}

/* 微信登录按钮样式 */
.btn-wechat {
    background-color: #07c160;
    color: #fff;
}

.btn-wechat:hover {
    background-color: #06ad56;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(7, 193, 96, 0.3);
}

/* 微信头像样式 */
.wechat-avatar {
    border: 2px solid #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 注册链接 */
.register-link {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--secondary-color);
}

.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
}

.register-link a:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/* 响应式样式 */
@media (max-width: 575.98px) {
    .login-card-body {
        padding: 1.5rem;
    }

    .login-card-header {
        padding: 1.5rem;
    }

    .login-options {
        align-items: flex-start;
        gap: 1rem;
    }

    .social-login-buttons {
        gap: 0.75rem;
    }
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card {
    animation: fadeIn 0.5s ease forwards;
}