/**
 * 网站头部优化样式
 * 优化标题显示、Logo间距、服务热线和移动端适配
 */

/* ========== Logo与标题区域优化 ========== */
.h_con {
    display: flex;
    align-items: center;
    gap: 20px; /* Logo与标题间距从默认增加到20px */
}

.site-logo {
    flex-shrink: 0;
    margin-right: 15px;
}

.site-logo img {
    max-height: 60px;
    width: auto;
    display: block;
}

/* ========== 标题文字优化 ========== */
.h_dw {
    flex: 1;
    line-height: 1.4;
}

.h_dw strong {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: #1a5f9a; /* 深蓝色，增强视觉层次 */
    margin-bottom: 4px;
}

.h_dw .subtitle {
    display: block;
    font-size: 14px;
    color: #666666; /* 灰色副标题，形成层次对比 */
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* ========== 服务热线优化 ========== */
.tel {
    text-align: right;
    white-space: nowrap;
}

.tel-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-right: 8px;
    vertical-align: middle;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%231a5f9a"><path d="M20.01 15.38c-1.23 0-2.42-.2-3.53-.56a.977.977 0 0 0-1.01.24l-2.2 2.2a15.045 15.045 0 0 1-6.59-6.59l2.2-2.21a.96.96 0 0 0 .25-1.01A11.36 11.36 0 0 1 8.5 4c0-.55-.45-1-1-1H4c-.55 0-1 .45-1 1 0 9.39 7.61 17 17 17 .55 0 1-.45 1-1v-3.5c0-.55-.45-1-1-1zM19 12h2a9 9 0 0 0-9-9v2c3.87 0 7 3.13 7 7zm-4 0h2c0-1.66-1.34-3-3-3v2c.55 0 1 .45 1 1z"/></svg>');
    background-size: contain;
    background-repeat: no-repeat;
}

.tel-label {
    font-size: 14px;
    color: #666666;
    margin-right: 5px;
}

.tel-number {
    font-size: 20px;
    font-weight: 700;
    color: #e74c3c; /* 红色突出显示电话号码 */
    text-decoration: none;
    transition: color 0.3s ease;
}

.tel-number:hover {
    color: #c0392b;
    text-decoration: underline;
}

/* ========== 移动端适配优化 ========== */
@media screen and (max-width: 768px) {
    .h_con {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 10px;
    }

    .site-logo {
        margin-right: 0;
        margin-bottom: 8px;
    }

    .site-logo img {
        max-height: 45px;
    }

    .h_dw strong {
        font-size: 18px;
    }

    .h_dw .subtitle {
        font-size: 12px;
    }

    .tel {
        text-align: left;
        width: 100%;
        margin-top: 8px;
        padding-top: 8px;
        border-top: 1px solid #eee;
    }

    .tel-number {
        font-size: 18px;
    }
}

/* ========== 超小屏幕适配 ========== */
@media screen and (max-width: 480px) {
    .h_dw strong {
        font-size: 16px;
    }

    .h_dw .subtitle {
        font-size: 11px;
        line-height: 1.3;
    }

    .tel-icon {
        width: 16px;
        height: 16px;
    }

    .tel-label {
        font-size: 12px;
    }

    .tel-number {
        font-size: 16px;
    }
}

/* ========== 平板设备适配 ========== */
@media screen and (min-width: 769px) and (max-width: 1024px) {
    .h_dw strong {
        font-size: 20px;
    }

    .h_dw .subtitle {
        font-size: 13px;
    }

    .tel-number {
        font-size: 18px;
    }
}