/* ========== Tab 导航样式 ========== */
.tab-nav-wrapper {
    padding: 30px 0;
}
.tab-nav {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    border-bottom: 2px solid #eee;
    justify-content: center;
}
.tab-nav li {
    margin: 0 80px;
}
.tab-nav-link {
    display: block;
    padding: 12px 0;
    font-size: 16px;
    color: #383838;
    text-decoration: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: color 0.3s, border-color 0.3s;
}
.tab-nav-link:hover {
    color: #019fe8;
}
.tab-nav-link.active {
    color: #019fe8 !important;
    border-bottom-color: #019fe8 !important;
}

/* 内容区块：非 active 的隐藏 */
.tab-panel {
    display: none;
}
.tab-panel.active {
    display: block;
}

/* ========== 下载列表样式 ========== */
.download-list {
    max-width: 1400px;
    margin: 0 auto;
}
.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 30px 40px;
    /* border: 1px solid #e8e8e8; */
    border-bottom: 1px solid #e8e8e8;
    /* border-radius: 12px; */
    background: #fff;
    transition: box-shadow 0.3s;
}
.download-item:hover {
    /* box-shadow: 0 4px 20px rgba(0,0,0,0.08); */
}
.download-item-left {
    display: flex;
    align-items: center;
    gap: 24px;
    flex: 1;
}
.download-logo {
    width: 91px;
    height: 66px;
    object-fit: contain;
}
.download-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.download-name {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a1a;
}
.download-desc {
    font-size: 14px;
    color: #666;
    /* line-height: 1.6; */
}
.download-date {
    font-size: 13px;
      color: #666;
}
.download-item-right {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-shrink: 0;
}
.download-platform {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #555;
}
.download-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: #019fe8;
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.3s;
}
.download-btn:hover {
    background: #0180c0;
    color: #fff;
    text-decoration: none;
}

/* ========== 视频列表 Grid 布局 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 0;
}
.video-card {
    cursor: pointer;
}
.video-card-img {
    position: relative;
    width: 100%;
    height: 244px;
    overflow: hidden;
}
.video-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.video-play-icon {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.video-play-icon img {
    width: 30px;
    height: 30px;
}
.video-card-title {
    text-align: center;
    font-size: 15px;
    color: #383838;
    margin-top: 15px;
}