.call-speaker-banner {
    width: 100%;
    position: relative;
    background: linear-gradient(135deg, #5222d0, #b847d0);
    overflow: hidden;
    height: 360px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.city-bg-layer {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    /*这边可以控制图像的高度*/
    height: 100%;
    background-image: url("../pics/airline1.png");
    background-size: cover;
    background-position: center bottom;
    opacity: 0.35;
    z-index: 1;
}
.banner-top-content {
    position: relative;
    z-index: 2;
    padding: 30px 40px;
    display: grid;
    grid-template-columns: 55% 45%;
    align-items: stretch;
}
.text-block {
    color: #ffffff;
}
.text-block h1 {
    font-size: 56px;
    line-height: 1;
    font-weight: 800;
    margin-bottom: 12px;
}
.hashtag-tag {
    font-size: 34px;
    font-weight: 700;
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
}
.year-badge {
    background: #fff;
    color: #5222d0;
    padding: 3px 10px;
    border-radius: 30px;
    font-size: 30px;
}

/* 头像容器：靠右 + 垂直居中基准 */
.avatar-group {
    position: relative;
    width: 100%;
    height: 100%;
    /* 垂直居中核心：top50% + 自身往上偏移一半高度 */
    top: 50%;
    transform: translateY(-50%);
}
.avatar-circle {
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #fff;
    position: absolute;
    background: #c058dd;
}
.avatar-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
/* 整体靠右排布，垂直整体居中堆叠 */
.avatar-1 {
    width: 150px;
    height: 150px;
    right: 140px;
    top: 20px;
    z-index: 3;
}
.avatar-2 {
    width: 150px;
    height: 150px;
    right: 0;
    top: 0;
    z-index: 2;
}
.avatar-3 {
    width: 180px;
    height: 180px;
    right: 40px;
    top: 60px;
    z-index: 4;
}

.banner-bottom-bar {
    background: rgba(20,20,30,0.75);
    width: 100%;
    /*padding: 18px 40px;*/
    position: relative;
    text-align: center;
    z-index: 2;
}
.deadline-text {
    color: #fff;
    font-size: 34px;
    font-weight: 700;
}

.cfp-desc-section {
    padding: 30px 10px;
    background: #f8f9fa;
}
.container {
    max-width: 1600px;
    margin: 0 auto;
}
.desc-wrap {
    max-width: 1200px;
    margin: 0 auto;
}
.desc-wrap h3 {
    font-size: 30px;
    color: #002070;
    margin-bottom: 20px;
}
.desc-wrap p {
    font-size: 17px;
    line-height: 1.8;
    color: #333;
    margin-bottom: 18px;
}
.submit-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 16px 40px;
    background: #5222d0;
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    transition: 0.3s ease;
}
.submit-btn:hover {
    background: #3e19a0;
}

@media (max-width: 1200px) {
    .banner-top-content {
        grid-template-columns: 1fr;
    }
    .text-block h1 {
        font-size: 46px;
    }
    .hashtag-tag {
        font-size: 28px;
    }
    .avatar-group {
        height: 240px;
        margin-top: 20px;
        top: 0;
        transform: none;
    }
    .avatar-1, .avatar-2 {
        width: 130px;
        height: 130px;
    }
    .avatar-3 {
        width: 160px;
        height: 160px;
    }
    .deadline-text {
        font-size: 28px;
    }
}
@media (max-width: 768px) {
    .text-block h1 {
        font-size: 32px;
    }
    .hashtag-tag {
        font-size: 22px;
    }
    .year-badge {
        font-size: 22px;
    }
    .avatar-1, .avatar-2 {
        width: 100px;
        height: 100px;
    }
    .avatar-3 {
        width: 120px;
        height: 120px;
    }
    .deadline-text {
        font-size: 22px;
    }
    .banner-top-content {
        padding: 20px 20px;
    }
    .banner-bottom-bar {
        padding: 14px 20px;
    }
    .call-speaker-banner {
        height: auto;
        min-height: 360px;
    }
}