html, body {
    height: 100%;
    margin: 0;
    background: #000;

}
#term {
    height: 100%;
    width: 100%;
}

.container {
    /* 关键：居中 */
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center; /* 水平居中 */
    align-items: center;     /* 垂直居中 */
}

/* 登录卡片 */
.login-card {
    width: 280px;
    padding: 30px 25px;
    background: #ffffff;
    border-radius: 14px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* 标题 */
.login-card-title {
    text-align: center;
    margin-bottom: 25px;
    font-size: 20px;
    color: #222;
}

/* 输入框 */
.login-field {
    width: 90%;
    padding: 10px 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.2s;
}

.login-field:focus {
    border-color: #42b983;
    box-shadow: 0 0 5px rgba(66,184,131,0.3);
    outline: none;
}

/* 登录按钮 */
.login-submit {
    width: 100%;
    padding: 10px 0;
    background: #42b983;
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.2s;
}

.login-submit:hover {
    background: #66c7a5;
}

/* 链接 */
.login-link {
    display: block;
    text-align: center;
    margin-top: 12px;
    font-size: 13px;
    color: #888;
    text-decoration: none;
}

.login-link:hover {
    color: #42b983;
}