/* ========== 登录页专用样式 ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eef2ff 0%, #f0f9ff 50%, #f5f3ff 100%);
}
.login-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    border: 1px solid #e2e8f0;
    width: 100%;
    max-width: 380px;
    padding: 40px;
}
.login-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
}
.login-subtitle {
    text-align: center;
    font-size: 14px;
    color: #64748b;
    margin-bottom: 32px;
}
.login-back {
    display: block;
    text-align: center;
    margin-top: 16px;
    color: #64748b;
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s;
}
.login-back:hover {
    color: #4f46e5;
}
.captcha-row {
    display: flex;
    gap: 10px;
    align-items: center;
}
.captcha-img {
    height: 50px;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid #e2e8f0;
    transition: opacity 0.2s;
}
.captcha-img:hover {
    opacity: 0.8;
}