/* 全局变量（统一品牌质感） */
:root {
    --primary-color: #4096ff;
    --primary-light: #e8f3ff;
    --primary-gradient: linear-gradient(135deg, #4096ff 0%, #66b2ff 100%);
    --text-dark: #1e293b;
    --text-gray: #475569;
    --text-gray-register: #64748b; /* 注册页专属文本灰色 */
    --text-light: #94a3b8;
    --border-color: #e2e8f0;
    --bg-color: #f8fafc;
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --card-shadow-register: 0 8px 30px rgba(0, 0, 0, 0.06);
    --hover-shadow: 0 12px 40px rgba(64, 150, 255, 0.12);
    --card-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.08);
    --transition-base: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-register: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

/* 页面基础重置（全局通用） */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

/* 通用页面容器样式（登录+注册） */
.login-page,
.register-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, var(--bg-color) 0%, #f0f7ff 100%);
    position: relative;
    overflow: hidden;
}

    /* 通用背景装饰元素（提升高端感） */
    .login-page::before,
    .login-page::after,
    .register-page::before,
    .register-page::after {
        content: "";
        position: absolute;
        border-radius: 50%;
        background: rgba(64, 150, 255, 0.05);
        z-index: 0;
    }

    .login-page::before,
    .register-page::before {
        width: 600px;
        height: 600px;
        top: -200px;
        right: -200px;
    }

    .login-page::after,
    .register-page::after {
        width: 400px;
        height: 400px;
        bottom: -150px;
        left: -150px;
    }

/* 通用卡片基础样式 */
.login-card,
.register-card {
    width: 100%;
    max-width: 520px;
    border: none;
    border-radius: var(--radius-lg);
    background: white;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* 登录卡片专属样式 */
.login-card {
    box-shadow: var(--card-shadow);
    transition: var(--transition-base);
}

    .login-card:hover {
        box-shadow: var(--hover-shadow);
    }

/* 注册卡片专属样式 */
.register-card {
    box-shadow: var(--card-shadow-register);
    transition: var(--transition-register);
}

    .register-card:hover {
        box-shadow: var(--card-shadow-hover);
    }

    /* 通用卡片头部样式 */
    .login-card .card-header,
    .register-card .card-header {
        background: var(--primary-gradient);
        color: white;
        padding: 2rem;
        border-bottom: none;
        text-align: center;
        position: relative;
    }

        .login-card .card-header::after,
        .register-card .card-header::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 8px;
            background: linear-gradient(90deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0.1) 100%);
        }

        /* 注册卡片头部专属样式 */
        .register-card .card-header::after {
            border-radius: 0 0 8px 8px;
        }

        .login-card .card-header h4,
        .register-card .card-header h3 {
            font-weight: 700;
            font-size: 1.8rem;
            margin: 0;
            letter-spacing: 0.5px;
        }

        .login-card .card-header p {
            opacity: 0.95;
            margin: 0.8rem 0 0 0;
            font-size: 1rem;
            letter-spacing: 0.3px;
        }

    /* 通用卡片主体样式 */
    .login-card .card-body,
    .register-card .card-body {
        padding: 2.8rem;
    }

/* 通用表单标签样式 */
.form-label {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.85rem;
    display: flex;
    align-items: center;
}

.login-card .form-label {
    font-size: 1rem;
    letter-spacing: 0.2px;
}

.register-card .form-label {
    font-size: 0.98rem;
}

.form-label i {
    font-size: 1.1rem;
}

.register-card .form-label i {
    opacity: 0.9;
}

/* 登录页输入框组样式 */
.input-group {
    height: 56px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
    background: white;
}

    .input-group:focus-within {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 6px rgba(64, 150, 255, 0.08);
        transform: translateY(-1px);
    }

.input-group-text {
    background-color: var(--primary-light);
    border: none;
    color: var(--primary-color);
    width: 52px;
    justify-content: center;
    font-size: 1.2rem;
}

/* 通用表单输入框样式 */
.form-control {
    height: 100%;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 0 1.5rem;
    color: var(--text-dark);
    box-shadow: none !important;
    transition: var(--transition-base);
}

.login-card .form-control {
    border: none !important;
    font-size: 1.05rem;
    letter-spacing: 0.2px;
}

.register-card .form-control {
    height: 56px;
    font-size: 1rem;
    background-color: #fefefe;
}

.form-control::placeholder {
    color: var(--text-light);
    letter-spacing: 0.1px;
}

.login-card .form-control::placeholder {
    font-size: 1rem;
}

.register-card .form-control::placeholder {
    font-size: 0.95rem;
}

.register-card .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 6px rgba(64, 150, 255, 0.08);
    outline: none;
    background-color: white;
    transform: translateY(-1px);
}

/* 通用验证码区域样式 */
.captcha-container {
    align-items: center;
    gap: 16px !important;
}

.captcha-img {
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    width: 150px;
    height: 56px;
    object-fit: cover;
    cursor: pointer;
    transition: var(--transition-base);
}

.login-card .captcha-img:hover {
    opacity: 0.92;
    border-color: var(--primary-color);
    transform: scale(1.02);
    box-shadow: 0 2px 8px rgba(64, 150, 255, 0.1);
}

.register-card .captcha-img {
    background-color: #fefefe;
    transition: var(--transition-register);
}

    .register-card .captcha-img:hover {
        opacity: 0.92;
        border-color: var(--primary-color);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(64, 150, 255, 0.1);
    }

/* 通用表单文本样式 */
.form-text {
    font-size: 0.9rem;
    color: var(--text-light) !important;
    margin-top: 0.65rem !important;
    letter-spacing: 0.1px;
}

/* 通用提交按钮样式 */
.login-btn,
.register-btn {
    height: 58px;
    border-radius: var(--radius-md);
    background: var(--primary-gradient);
    border: none;
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
    margin-top: 1rem;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.login-btn {
    transition: var(--transition-base);
}

.register-btn {
    font-weight: 600;
    letter-spacing: 0.8px;
    transition: var(--transition-register);
}

    .login-btn::before,
    .register-btn::before {
        content: "";
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    }

.login-btn::before {
    transition: all 0.6s ease;
}

.register-btn::before {
    transition: var(--transition-register);
}

.login-btn:hover {
    background: linear-gradient(135deg, #3388ee 0%, #5599ff 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(64, 150, 255, 0.25);
}

.register-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(64, 150, 255, 0.25);
}

    .login-btn:hover::before,
    .register-btn:hover::before {
        left: 100%;
    }

.login-btn:active,
.register-btn:active {
    transform: translateY(0);
}

.login-btn:active {
    box-shadow: 0 4px 12px rgba(64, 150, 255, 0.15);
}

.register-btn:active {
    box-shadow: 0 4px 16px rgba(64, 150, 255, 0.2);
}

/* 通用错误提示框样式 */
.alert-danger {
    border-radius: var(--radius-md);
    border: none;
    background-color: #fef2f2;
    color: #dc2626;
    padding: 1.2rem 1.5rem;
    margin-bottom: 1.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.08);
}

.register-card .alert-danger {
    margin-bottom: 2rem;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.08);
    animation: shake 0.5s ease-in-out;
}

.alert-danger i {
    font-size: 1.2rem;
}

/* 登录页注册引导区域 */
.register-guide {
    margin-top: 2rem;
    text-align: center;
    font-size: 1rem;
    color: var(--text-gray);
    letter-spacing: 0.2px;
}

.register-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    margin-left: 6px;
    position: relative;
    padding-bottom: 2px;
    transition: var(--transition-base);
}

    .register-link::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--primary-gradient);
        transition: var(--transition-base);
    }

    .register-link:hover {
        color: #3388ee;
        text-decoration: none;
    }

        .register-link:hover::after {
            width: 100%;
        }

/* 注册页登录引导区域 */
.login-area {
    margin-top: 2rem;
    text-align: center;
    font-size: 1rem;
    color: var(--text-gray-register);
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.login-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    margin-left: 6px;
    transition: var(--transition-register);
    position: relative;
}

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

    .login-link:hover {
        color: #2580eb;
        text-decoration: none;
    }

        .login-link:hover::after {
            width: 100%;
        }

/* 注册页表单间距 */
.form-group {
    margin-bottom: 1.2rem !important;
}

/* 登录页调试样式（可选） */
.validation-message {
    color: #dc3545;
    font-size: 0.9rem;
    margin-top: 0.4rem;
    letter-spacing: 0.1px;
}

/* 错误提示动画 */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

/* 通用响应式适配（保持高端感） */
@media (max-width: 576px) {
    .login-card .card-body,
    .register-card .card-body {
        padding: 2rem;
    }

    .input-group,
    .register-card .form-control {
        height: 52px;
    }

    .captcha-img {
        width: 130px;
        height: 52px;
    }

    .login-btn,
    .register-btn {
        height: 54px;
        font-size: 1.05rem;
    }

    .login-card .card-header,
    .register-card .card-header {
        padding: 1.8rem;
    }

    .login-card .card-header h4,
    .register-card .card-header h3 {
        font-size: 1.6rem;
    }
}