* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    background-color: #f5f7fa;
}

/* 左侧：系统图文介绍 */
.left-section {
    flex: 1;
    background: linear-gradient(135deg, #ffd509, #ff1821);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    position: relative;
    overflow: hidden;
}

    /* 装饰圆形 */
    .left-section::before {
        content: '';
        position: absolute;
        width: 320px;
        height: 320px;
        background: rgba(255,255,255,0.08);
        border-radius: 50%;
        top: -120px;
        left: -100px;
    }

    .left-section::after {
        content: '';
        position: absolute;
        width: 220px;
        height: 220px;
        background: rgba(255,255,255,0.08);
        border-radius: 50%;
        bottom: -60px;
        right: 60px;
    }

.logo {
    font-size: 70px;
    margin-bottom: 30px;
    z-index: 1;
}

.system-title {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 20px;
    z-index: 1;
    text-align: center;
}

.system-desc {
    font-size: 16px;
    line-height: 1.8;
    max-width: 520px;
    text-align: center;
    opacity: 0.92;
    z-index: 1;
    margin-bottom: 40px;
}

.feature-box {
    z-index: 1;
    width: 100%;
    max-width: 460px;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 22px;
    font-size: 16px;
}

    .feature-item i {
        width: 28px;
        height: 28px;
        background: rgba(255,255,255,0.15);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-right: 14px;
        font-size: 14px;
    }

/* 右侧：悬浮登录框 */
.right-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    position: relative;
}

.login-card {
    background: #fff;
    width: 100%;
    max-width: 400px;
    padding: 50px 35px;
    border-radius: 18px;
    box-shadow: 0 12px 45px rgba(0, 0, 0, 0.12);
    animation: cardFade 0.6s ease-out;
    margin-bottom: 25px;
}

@keyframes cardFade {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-title {
    font-size: 26px;
    font-weight: bold;
    color: #222;
    text-align: center;
    margin-bottom: 10px;
}

.login-subtitle {
    color: #888;
    text-align: center;
    margin-bottom: 45px;
    font-size: 15px;
}

.form-item {
    margin-bottom: 28px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-size: 14px;
}

.input-group {
    position: relative;
}

    .input-group i {
        position: absolute;
        left: 15px;
        top: 50%;
        transform: translateY(-50%);
        color: #999;
        font-size: 16px;
    }

    .input-group input {
        width: 100%;
        height: 48px;
        padding: 0 18px 0 50px;
        border: 1px solid #e5e6eb;
        border-radius: 10px;
        font-size: 15px;
        outline: none;
        transition: all 0.3s;
    }

        .input-group input:focus {
            border-color: #1890ff;
            box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.1);
        }

/* 同意协议勾选框 */
.agree-box {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    font-size: 14px;
    color: #666;
}

    .agree-box input {
        margin-right: 8px;
        width: 16px;
        height: 16px;
        cursor: pointer;
    }

    .agree-box label {
        cursor: pointer;
    }

    .agree-box a {
        color: #1890ff;
        text-decoration: none;
    }

.login-btn {
    width: 100%;
    height: 50px;
    background: #1890ff;
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
    margin-bottom:15px;
}

    .login-btn:hover {
        background: #0d7dd7;
    }

/* 右侧底部版权 */
.copyright {
    text-align: center;
    font-size: 13px;
    color: #999;
    width: 100%;
    line-height: 2;
}

/* 移动端适配 */
@media (max-width: 992px) {
    body {
        flex-direction: column;
    }

    .left-section {
        padding: 60px 20px;
    }

    .right-section {
        width: 100%;
        padding: 30px 20px;
    }

    .system-title {
        font-size: 28px;
    }
}