.o-index-top-img { padding-top:10px; }
.o-index-top-img img { width:1200px; display:block; }
/* 头条区域 */
.o-headline {
    margin: 40px 0 50px;
}
.o-headline-grid {
    display: flex;
    gap: 30px;
}
.o-headline-left {
    flex: 2;
    position: relative;
    overflow: hidden;
}
.o-headline-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.o-headline-left:hover .o-headline-img {
    transform: scale(1.02);
}
.o-headline-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    padding: 30px 28px 25px;
}
.o-headline-tag {
    display: inline-block;
    background: #003366;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 14px;
    margin-bottom: 10px;
}
.o-headline-title {
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
    line-height: 1.3;
}
.o-headline-title a {
    color: #fff;
    text-decoration: none;
}
.o-headline-title a:hover {
    color: #ff9900;
}
.o-headline-desc {
    font-size: 14px;
    color: rgba(255,255,255,0.85);
    line-height: 1.5;
}
.o-headline-meta {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    margin-top: 8px;
}
.o-headline-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.o-headline-right-item {
    display: flex;
    gap: 15px;
    background: #f8f9fa;
    padding: 15px;
    transition: all 0.3s ease;
}
.o-headline-right-item:hover {
    transform: translateX(5px);
    background: #f0f2f5;
}
.o-headline-right-img {
    width: 100px;
    height: 70px;
    object-fit: cover;
    flex-shrink: 0;
}
.o-headline-right-content {
    flex: 1;
}
.o-headline-right-title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 5px;
}
.o-headline-right-title a {
    color: #1a2a3a;
    text-decoration: none;
}
.o-headline-right-title a:hover {
    color: #003366;
}
.o-headline-right-meta {
    font-size: 11px;
    color: #8a9aaa;
}

/* 栏目左侧大图 - 1:1 标题浮图 */
.o-left-large {
    position: relative;
    overflow: hidden;
}
.o-left-large-img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.o-left-large:hover .o-left-large-img {
    transform: scale(1.02);
}
.o-left-large-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(0deg, rgba(0,0,0,0.75) 0%, transparent 100%);
    padding: 20px 20px 15px;
}
.o-left-large-tag {
    display: inline-block;
    background: #003366;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    margin-bottom: 8px;
}
.o-left-large-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 5px;
    line-height: 1.3;
}
.o-left-large-title a {
    color: #fff;
    text-decoration: none;
}
.o-left-large-title a:hover {
    color: #003366;
}
.o-left-large-desc {
    font-size: 11px;
    color: rgba(255,255,255,0.8);
}

/* 右侧网格 - 图片4:3 */
.o-grid-item {
    background: #fff;
    border: 1px solid #eef2f0;
    overflow: hidden;
    transition: 0.3s;
}
.o-grid-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.o-grid-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}
.o-grid-content {
    padding: 14px;
}
.o-grid-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}
.o-grid-title a {
    color: #1a2a3a;
    text-decoration: none;
}
.o-grid-title a:hover {
    color: #003366;
}

/* 视频栏目 */
.o-video-section {
    margin: 40px 0;
}
.o-video-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e0e8f0;
}
.o-video-title {
    font-size: 24px;
    font-weight: 700;
    color: #003366;
}
.o-video-more {
    font-size: 13px;
    color: #8a9aaa;
    text-decoration: none;
}
.o-video-grid {
    display: flex;
    gap: 25px;
}
.o-video-card {
    flex: 1;
    background: #fff;
    border: 1px solid #eef2f0;
    overflow: hidden;
    transition: 0.3s;
}
.o-video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.o-video-img {
    position: relative;
    aspect-ratio: 16 / 9;
}
.o-video-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.o-video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: rgba(0,0,0,0.6);
    border-radius: 50%;
}
.o-video-play:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 55%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 16px;
    border-color: transparent transparent transparent #fff;
}
.o-video-content {
    padding: 14px;
}
.o-video-text {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    color: #1a2a3a;
    text-decoration: none;
    display: block;
}
.o-video-text:hover {
    color: #003366;
}

/* 三列各地县域 */
.o-three-col {
    display: flex;
    gap: 25px;
}
.o-county-card {
    flex: 1;
    background: #fff;
    border: 1px solid #eef2f0;
    overflow: hidden;
    transition: 0.3s;
}
.o-county-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.o-county-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}
.o-county-content {
    padding: 18px;
}
.o-county-name {
    font-size: 17px;
    font-weight: 700;
    color: #003366;
    margin-bottom: 6px;
}
.o-county-name a {
    color: #003366;
    text-decoration: none;
}
.o-county-desc {
    font-size: 12px;
    color: #8a9aaa;
}
.o-county-stats {
    display: flex;
    gap: 16px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #eef2f0;
    font-size: 11px;
    color: #8a9aaa;
}

/* 四列专题 */
.o-four-col {
    display: flex;
    gap: 25px;
}
.o-topic-card {
    flex: 1;
    background: #fff;
    border: 1px solid #eef2f0;
    overflow: hidden;
    transition: 0.3s;
}
.o-topic-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.o-topic-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}
.o-topic-content {
    padding: 14px;
}
.o-topic-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
}
.o-topic-title a {
    color: #1a2a3a;
    text-decoration: none;
}
.o-topic-desc {
    font-size: 12px;
    color: #8a9aaa;
}

/* 图片集 */
.o-gallery-grid {
    display: flex;
    gap: 20px;
}
.o-gallery-card {
    flex: 1;
    position: relative;
    overflow: hidden;
}
.o-gallery-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}
.o-gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(0deg, rgba(0,0,0,0.6), transparent);
    padding: 14px;
}
.o-gallery-title {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
}
.o-gallery-location {
    font-size: 11px;
    color: rgba(255,255,255,0.8);
}

/* 访谈栏目 */
.o-interview-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
}
.o-interview-item {
    width: calc(50% - 13px);
    background: #fff;
    border: 1px solid #eef2f0;
    overflow: hidden;
    transition: 0.3s;
}
.o-interview-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.o-interview-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}
.o-interview-content {
    padding: 20px;
}
.o-interview-name {
    font-size: 12px;
    font-weight: 600;
    color: #003366;
    margin-bottom: 6px;
}
.o-interview-title {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}
.o-interview-title a {
    color: #1a2a3a;
    text-decoration: none;
}
.o-interview-desc {
    font-size: 13px;
    color: #8a9aaa;
    line-height: 1.5;
}

/* 科普之窗 + 问答专区 */
.o-science-wrapper {
    display: flex;
    gap: 25px;
    margin-bottom: 50px;
}
.o-science-col {
    flex: 1;
}
.o-science-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e0e8f0;
}
.o-science-title {
    font-size: 20px;
    font-weight: 700;
    color: #003366;
}
.o-science-more {
    font-size: 12px;
    color: #8a9aaa;
    text-decoration: none;
}
.o-science-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.o-science-card {
    width: calc(50% - 10px);
    background: #fff;
    border: 1px solid #eef2f0;
    overflow: hidden;
    transition: 0.3s;
}
.o-science-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.06);
}
.o-science-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}
.o-science-content {
    padding: 12px;
}
.o-science-card-title {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
}
.o-science-card-title a {
    color: #1a2a3a;
    text-decoration: none;
}
.o-science-card-desc {
    font-size: 11px;
    color: #8a9aaa;
}

/* 问答专区列表 */
.o-qa-list {
    background: #f8f9fa;
}
.o-qa-item {
    padding: 15px 0;
    border-bottom: 1px solid #eef2f0;
    display: flex;
    gap: 12px;
}
.o-qa-item:last-child {
    border-bottom: none;
}
.o-qa-q {
    width: 32px;
    height: 32px;
    background: #003366;
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    line-height: 32px;
    border-radius: 6px;
    flex-shrink: 0;
}
.o-qa-question {
    font-size: 14px;
    font-weight: 600;
    color: #1a2a3a;
    margin-bottom: 5px;
    line-height: 1.4;
}
.o-qa-question a {
    color: #1a2a3a;
    text-decoration: none;
}
.o-qa-answer {
    font-size: 12px;
    color: #8a9aaa;
    line-height: 1.5;
}

/* 栏目通用 */
.o-section {
    margin-bottom: 50px;
}
.o-section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e0e8f0;
}
.o-section-title {
    font-size: 24px;
    font-weight: 700;
    color: #003366;
}
.o-section-more {
    font-size: 13px;
    color: #8a9aaa;
    text-decoration: none;
}
.o-two-col {
    display: flex;
    gap: 25px;
}
.o-left-large {
    flex: 4;
}
.o-right-grid {
    flex: 6;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.o-grid-item {
    width: calc(33.33% - 14px);
}