/* login_style.css */

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

html,
body {
    min-height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #eef4ff, #f8fbff);
    color: #1f2937;
}

/* 整个页面容器 */
.page-wrapper {
    min-height: 100vh;
    width: 100%;
    padding: 30px 20px;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* 上半部标题 */
.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-header h1 {
    font-size: clamp(28px, 4vw, 46px);
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 10px;
}

.login-header p {
    font-size: clamp(15px, 2vw, 20px);
    color: #475569;
}

/* 下半部表格卡片 */
.login-card {
    width: 100%;
    max-width: 430px;
    background: #ffffff;
    padding: 34px 30px;
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(30, 58, 138, 0.12);
}

/* 错误信息 */
.error-message {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fecaca;
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

/* 表格 */
.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 15px;
    font-weight: 600;
    color: #334155;
}

.form-group input {
    width: 100%;
    padding: 14px 15px;
    font-size: 16px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    outline: none;
    background: #f8fafc;
    transition: 0.2s ease;
}

.form-group input:focus {
    border-color: #2563eb;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

/* 按钮上色 */
.login-btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #ffffff;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s ease;
}

.login-btn:hover {
    background: linear-gradient(135deg, #1d4ed8, #1e40af);
    transform: translateY(-1px);
}

.login-btn:active {
    transform: scale(0.98);
}
.login-round-label {
    font-weight: bold;
    color: #0047ab;
}
/* 平板电脑 */
@media (max-width: 768px) {
    .page-wrapper {
        padding: 28px 18px;
    }

    .login-card {
        max-width: 460px;
        padding: 32px 26px;
    }
}

/* 手机 */
@media (max-width: 480px) {
    .page-wrapper {
        justify-content: flex-start;
        padding-top: 55px;
    }

    .login-header {
        margin-bottom: 24px;
    }

    .login-card {
        padding: 28px 22px;
        border-radius: 16px;
    }

    .form-group input {
        padding: 13px 14px;
        font-size: 15px;
    }

    .login-btn {
        padding: 14px;
        font-size: 16px;
    }
}

/* 很小的手机 */
@media (max-width: 360px) {
    .login-card {
        padding: 24px 18px;
    }

    .login-header h1 {
        font-size: 25px;
    }
}