/* ===== 底部区域：宽度100%，背景 #003778 ===== */
.bottom-wrapper {
    width: 100%;
    background: #003778;
    padding: 40px 0 16px 0;
    margin-top: 0;
}

/* ===== 内容容器：宽度900px，居中 ===== */
.bottom-content {
    width: 900px;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 底部信息网格 ===== */
.bottom-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px 20px;
    padding-bottom: 26px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.bottom-col {
    flex: 0 1 auto;
}

    /* ===== 标题 ===== */
    .bottom-col h3 {
        font-size: 16px;
        font-weight: 600;
        color: #ffffff;
        margin-bottom: 14px;
        position: relative;
        padding-bottom: 8px;
    }

        .bottom-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 22px;
            height: 2px;
            background: #4a9eff;
        }

    /* ===== 链接列表 ===== */
    .bottom-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

        .bottom-col ul li {
            margin-bottom: 6px;
        }

            .bottom-col ul li a {
                color: #ffffff;
                text-decoration: none;
                font-size: 13px;
                transition: opacity 0.2s;
            }

                .bottom-col ul li a:hover {
                    opacity: 0.70;
                    text-decoration: underline;
                }

/* ===== 联系我们 ===== */
.bottom-contact {
    min-width: 190px;
}

.contact-phone .phone-label {
    color: #ffffff;
    font-size: 18px;
    margin-bottom: 6px;
}

.contact-phone .phone-row {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 2px;
}

.contact-phone .phone-num {
    color: #ffffff;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.contact-phone .phone-sep {
    color: rgba(255, 255, 255, 0.30);
    font-size: 16px;
}

/* ===== 二维码 ===== */
.bottom-qrcode {
    min-width: 90px;
}

    .bottom-qrcode img {
        width: 78px;
        height: 78px;
        border: 2px solid rgba(255, 255, 255, 0.12);
        border-radius: 4px;
        display: block;
    }

/* ===== 版权信息 ===== */
.bottom-copyright {
    text-align: center;
    padding-top: 18px;
}

    .bottom-copyright p {
        color: #ffffff;
        font-size: 12px;
        line-height: 1.9;
        margin: 0;
    }

    .bottom-copyright a {
        color: #ffffff;
        text-decoration: none;
        transition: opacity 0.2s;
    }

        .bottom-copyright a:hover {
            opacity: 0.70;
            text-decoration: underline;
        }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .bottom-wrapper {
        padding: 30px 0 14px 0;
    }

    .bottom-grid {
        gap: 16px 20px;
        justify-content: flex-start;
    }

    .bottom-col {
        flex: 1 1 120px;
        min-width: 110px;
    }

    .bottom-contact {
        min-width: 200px;
        flex: 1 1 100%;
    }

    .bottom-qrcode {
        min-width: 80px;
    }

        .bottom-qrcode img {
            width: 70px;
            height: 70px;
        }

    .contact-phone .phone-num {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .bottom-wrapper {
        padding: 24px 0 12px 0;
    }

    .bottom-grid {
        flex-direction: column;
        gap: 14px 0;
        padding-bottom: 20px;
    }

    .bottom-col {
        flex: 1 1 auto;
        min-width: unset;
    }

        .bottom-col h3 {
            font-size: 14px;
            margin-bottom: 8px;
            padding-bottom: 6px;
        }

        .bottom-col ul li {
            display: inline-block;
            margin-right: 14px;
            margin-bottom: 2px;
        }

            .bottom-col ul li a {
                font-size: 12px;
            }

    .contact-phone .phone-label {
        font-size: 12px;
    }

    .contact-phone .phone-num {
        font-size: 14px;
    }

    .bottom-qrcode {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }

        .bottom-qrcode img {
            width: 64px;
            height: 64px;
        }

    .bottom-copyright p {
        font-size: 11px;
        line-height: 1.7;
    }
}
/* ===== 左下角隐藏管理后台链接 ===== */
.hidden-admin-link {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 100px;
    display: block;
    z-index: 9999;
    cursor: pointer;
    background: transparent;
    border: none;
    outline: none;
    /* 完全透明，不可见 */
    opacity: 0;
    /* 防止鼠标选中 */
    user-select: none;
    /* 确保没有任何背景或边框 */
    box-shadow: none;
    text-indent: -9999px;
    overflow: hidden;
}

/* 可选：调试时临时显示，上线后删除下面这段 */
/*.hidden-admin-link {
    opacity: 0.3;
    background: rgba(255, 0, 0, 0.1);
    border: 1px dashed red;
}*/