* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: "Microsoft YaHei", "SimHei", sans-serif; color: #333; background: #fff; }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }


       .twoNav {
           z-index: 150;
           position: fixed;
           top: 0;
           left: 0;
           height:150px;
           width: 100%;
           linear-gradient(#004080, transparent)
           /*transition: background 0.3s;*/
       }
       .twoNav.scrolled {
           background-color: #004080;
           border-bottom:5px solid #f1c40f;
           box-shadow: 0 20px 20px rgb(0 0 0 / 25%);
       }
 
        /* ===== 顶部导航 - 透明叠加在大图上 ===== */
        .top-bar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 0;
            padding:20px 0px;
            transition: background 0.3s;
        }
        .top-bar.scrolled {
            background: transparent;
        }
        .top-bar .container {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            height: 100%;
            padding: 0 20px;
            max-width:1400px;
        }
        .top-bar a {
            color: #fff;
            font-size: 12px;
            margin-left: 12px;
            transition: opacity 0.3s;
        }
        .top-bar a:hover { opacity: 0.8; text-decoration: underline; }
        .top-bar span { color: rgba(255,255,255,0.4); font-size: 12px; margin-left: 12px; }

        .short-line {
            width: 20px;
            height: 1px;
            background:rgba(255,255,255,0.3);
            margin:10px;
        }

        .icon-row {
            display: flex;
            align-items: flex-start;
        }
        .icon-item {
            text-align: center;
            cursor: pointer;
        }
        .icon-circle {
            width: 25px;
            height: 25px;
            border-radius: 50%;
            background: rgba(255,255,255,0);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            transition: all 0.3s;
            border: 1px solid #e0e0e0;
        }
        .icon-circle svg {
            width: 15px;
            height: 15px;
            fill: #fff;
            transition: fill 0.3s;
        }
        .icon-item:hover .icon-circle {
            background: #8B1A1A;
            border-color: #8B1A1A;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(139,26,26,0.25);
        }
        .icon-item:hover .icon-circle svg {
            fill: #fff;
        }
        .icon-item p {
            font-size: 13px;
            color: #666;
            transition: color 0.3s;
            line-height: 1.4;
        }
        .icon-item:hover p {
            color: #8B1A1A;
        }

        /* ===== 主导航 - 透明叠加在大图上 ===== */
        .main-nav {
            position: fixed;
            top: 50px;
            left: 0;
            right: 0;
            height: 80px;
            z-index: -1;
            border-bottom:1px solid rgba(255,255,255,0.1);
            padding:40px 0px 60px 0px;
            transition: background 0.3s, position 0.3s;
        }
        .main-nav.scrolled {
            background: transparent;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .main-nav.fixed .top-bar-inside {
            display: none;
        }

   
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            padding: 0 0px;
            position: relative;            
            max-width:1400px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-left { justify-content: flex-start; }
        .nav-right { justify-content: flex-end; }
        .nav-center {
            display: flex;
            align-items: center;
            margin: 0 20px;
            color: #fff;
        }
        .nav-center .logo-circle {
            width: 40px;
            height: 40px;
            border: 2px solid #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-right: 10px;
        }
        .nav-center .logo-text h1 { font-size: 16px; font-weight: bold; }
        .nav-center .logo-text p { font-size: 10px; opacity: 0.8; }

        .nav-item {
            position: relative;
            color: #fff;
            font-size: 18px;
            cursor: pointer;
            padding: 10px 16px;

            transition: opacity 0.3s;
            font-weight:bold;
        }
        .nav-item:hover { 
         opacity: 0.9;
         background-color: rgba(255,255,255,0.15); 
         padding: 10px 16px;

        transition: all 0.3s;
       }
        .nav-item .sub-nav {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            background: #fff;
            min-width: 120px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            padding: 10px 0px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 300;
            border-top:#004080 3px solid;
        }
        .nav-item:hover .sub-nav {
            opacity: 1;
            visibility: visible;
            top: calc(100% + 5px);
        }
        .nav-item .sub-nav a {
            display: block;
            padding: 15px 10px;
            font-size: 14px;
            color: #333;
            transition: all 0.2s;
            border-bottom:#efefef 1px solid;
            text-align:center;
        }
        .nav-item .sub-nav a:hover {
            background: #f5f5f5;
            color: #8B1A1A;
        }


 /* 三角颠倒方向 */
.nav-arrow {
    display: inline-block;
    transition: transform 0.3s;
    font-size: 10px;
    margin-left: 5px;
    justify-content: center;
    align-items: center;
}
.nav-item:hover .nav-arrow {
    transform: rotate(180deg); 
}

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 30px;
            height: 30px;
            cursor: pointer;
            z-index: 500;
            position: relative;
        }
        .mobile-menu-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            margin: 3px 0;
            transition: all 0.3s;
        }
        .mobile-menu-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-menu-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== 轮播大图 ===== */
        .hero-banner {
            width: 100%;
            height: 945px;
            position: relative;
            overflow: hidden;
            z-index: 1;            
        }
        .hero-slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 1s ease-in-out;
        }
        .hero-slide.active { opacity: 1; }
        .hero-slide:nth-child(1) {
            background: linear-gradient(135deg, #c0392b 0%, #e74c3c 30%, #f39c12 70%, #d35400 100%);
        }
        .hero-slide:nth-child(2) {
            background: linear-gradient(135deg, #1a5276 0%, #2980b9 50%, #3498db 100%);
        }
        .hero-slide:nth-child(3) {
            background: linear-gradient(135deg, #27ae60 0%, #2ecc71 50%, #1abc9c 100%);
        }
        .hero-content {
            text-align: center;
            color: #fff;
            z-index: 2;
        }
        .hero-content h2 {
            font-size: 72px;
            font-family: "KaiTi", "STKaiti", serif;
            letter-spacing: 8px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            margin-bottom: 20px;
        }
        .hero-stars {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-bottom: 30px;
        }
        .hero-stars span {
            color: #f1c40f;
            font-size: 20px;
        }
        .hero-birds {
            position: absolute;
            top: 20px;
            right: 60px;
            font-size: 24px;
            color: #f1c40f;
            opacity: 0.8;
        }
        .hero-birds-left {
            position: absolute;
            top: 30px;
            left: 80px;
            font-size: 20px;
            color: #f1c40f;
            opacity: 0.8;
        }
        .hero-dots {
            position: absolute;
            bottom: 100px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 8px;
            z-index: 10;
        }
        .hero-dots span {
            width: 30px;
            height: 4px;
            background: rgba(255,255,255,0.5);
            border-radius: 2px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .hero-dots span:hover { background: rgba(255,255,255,0.8); }
        .hero-dots span.active { background: #fff; }

/* ===== 轮播指示器 ===== */
        .hero-dots {
            position: absolute;
            bottom: 100px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 20px;
            z-index: 10;
        }

        .hero-dots span {
            width: 50px;
            height: 6px;
            border-radius: 0%;
            background: rgba(255,255,255,0.4);
            cursor: pointer;
            transition: all 0.3s;
            /*border: 2px solid rgba(255,255,255,0.3);*/
        }

        .hero-dots span:hover {
            background: rgba(255,255,255,0.7);
            transform: scale(1.2);
        }

        .hero-dots span.active {
            background: white;
            border-color: white;
            transform: scale(1.3);
            box-shadow: 0 0 10px rgba(255,255,255,0.5);
        }

        /* ===== 左右切换箭头 ===== */
        .hero-arrows {
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            transform: translateY(-50%);
            display: flex;
            justify-content: space-between;
            padding: 0 20px;
            z-index: 10;
            pointer-events: none;
        }

        .hero-arrow {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: rgba(0,0,0,0.3);
            border: 2px solid rgba(255,255,255,0.3);
            color: white;
            font-size: 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
            pointer-events: auto;
            backdrop-filter: blur(4px);
        }

        .hero-arrow:hover {
            background: rgba(0,0,0,0.6);
            border-color: rgba(255,255,255,0.6);
            transform: scale(1.1);
        }
































        /* ===== 通用区块间距 ===== */
        .section-work,
        .section-notice,
        .section-exhibit,
        .section-story,
        .section-lantai {
            padding: 50px 0px;
        }

        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }
        .section-title {
            font-size: 24px;
            color: #1a5276;
            font-weight: bold;
            position: relative;
            padding-bottom: 8px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 3px;
            background: #000;
        }
        .more-link {
            font-size: 13px;
            color: #666;
            transition: color 0.3s;
            margin-left: -10px;
        }
        .more-link:hover { color: #1a5276; }

        /* ===== 工作动态 ===== */
        .section-work { background: #efefef; }
        .section-work .section-header {
            justify-content: center;
            position: relative;
        }
        .section-work .section-title {
            color:#000;
            text-align: center;
            width: 100%;
        }
        .section-work .more-link {
            position: absolute;
            right: 0;
        }
        .work-grid {
            display: grid;
            grid-template-columns: 0.8fr 1fr;
            gap: 20px;
        }
        .work-grid a{
            background-color:#fff;
         }
        .work-bg-text {
            text-align: center;
            font-size: 48px;
            color: rgba(0,0,0,0.05);
            font-weight: bold;
            letter-spacing: 10px;
            /*position: absolute;
            top: 25px;
            left: 50%;
            transform: translateX(-50%);*/
            width: 100%;
            pointer-events: none;

        }



        .work-left {
            position: relative;
            background-color:#fff;
            transition: all 0.3s;
            cursor: pointer;
        }
        .work-left .work-img {
            width: 100%;
            height: 360px;
            background: #ddd;
            border-radius: 0px;
            overflow: hidden;
            position: relative;
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
        }

        /* .work-left:hover .work-img:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        } */
        .work-left .work-img img {
            width: 100%;
            height: 100%;
            transition: transform 0.5s;
        }
        .work-left .work-img:hover img { transform: scale(1.03); }
        .work-left h3 {
            font-size: 18px;
            color: #000;
            margin:0px 30px;            
            line-height: 1.8;
            cursor: pointer;
            transition: color 0.3s;
            border-bottom:1px solid #efefef;
            padding:10px 0px;
        }
        .work-left h3:hover { color: #1a5276; }
        .work-left:hover .work-left h3:hover {
           transform: translateY(-3px);
           box-shadow: 0 6px 16px rgba(0,0,0,0.12);
       }
        /* .work-left:hover .work-img {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        } */
        .work-left:hover {
            background-color: #c0392b;
            box-shadow: 0 6px 16px rgba(0,0,0,0.12); 
           transform: translateY(-10px);
        }
        .work-left:hover h3 {
            color: #fff;
            border-bottom-color: rgba(255,255,255,0.2);
        }
        .work-left:hover p.work-date-badge {
            background-color: rgba(255,255,255,0.2);
            color: #fff;
        }
        .work-left:hover p.abstract {
            color: #fff;
        }
        .work-left p {
            font-size: 14px;
            color: #999;
            margin:30px 30px;
            line-height: 1.8;
        }
        .work-left p.work-date-badge {
             border-bottom:1px solid #efefef;
             width:100px;
             border-radius: 50px;
             background-color:#efefef;
             padding:0px 5px;
             text-align:center;
         }

        .work-right {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
       .work-right .title{
            height:50px;
       }


        .work-item {
            position: relative;
            cursor: pointer;
            transition: transform 0.3s;
        }
        .work-item:hover { 
             transform: translateY(-10px);
             border-bottom:5px solid  #c0392b;
             margin:0px 0px -5px 0px;
        }
        .work-item .item-img {
            width: 100%;
            height: 210px;
            background: #ddd;
            border-radius: 0px;
            overflow: hidden;
            transition: box-shadow 0.3s;
        }
        .work-item:hover .item-img { box-shadow: 0 6px 16px rgba(0,0,0,0.12); }
        .work-item .item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .work-item:hover .item-img img { transform: scale(1.05); }
        .work-item .item-info{
           padding: 20px 20px;
           background-color:#fff;
        }
        .work-item p {
            font-size: 14px;
            color: #000;            
            line-height: 1.8;
            transition: color 0.3s;
            min-height:30px;            
        }
        .work-item:hover p { color: #1a5276; }

        /* ===== 通知公告 ===== */
        .section-notice {
            background: #004080;
            position: relative;
            overflow: hidden;
            height:700px;
        }
        .section-notice .section-title {
            color: #fff;
            text-align: center;
            width: 100%;
        }
        .section-notice .section-title::after {
            background: #fff;
        }
        .section-notice .section-header { justify-content: center; position: relative; }
        .section-notice .more-link { color: #fff; opacity: 0.8; position: absolute; right: 0; transition: opacity 0.3s; }
        .section-notice .more-link:hover { opacity: 1; }

        .notice-bg-text {
            text-align: center;
            font-size: 48px;
            color: rgba(0,0,0,0.1);
            font-weight: bold;
            letter-spacing: 10px;
            position: absolute;
            top: 25px;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            pointer-events: none;
        }

        .notice-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 30px;
        }
        .notice-item {
            background: #fff;
            padding: 20px 20px;
            border-radius: 0px;
            display: flex;
            align-items: flex-start;
            gap: 15px;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            height:90px;
        }
        .notice-item:hover {
            transform: translateY(-9px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.2);
            border-bottom:5px solid  #c0392b;
            padding: 20px 20px 15px 20px;
        }
        .notice-date {
            text-align: center;
            min-width: 60px;
            border-right: 1px solid #ddd;
            padding-right: 15px;
        }
        .notice-date .num {
            font-size: 28px;
            font-weight: bold;
            color: #1abc9c;
            line-height: 1;
        }
        .notice-date .ym {
            font-size: 11px;
            color: #999;
            margin-top: 4px;
        }
        .notice-text h4 {
            font-size: 13px;
            color: #333;
            line-height: 1.5;
            font-weight: normal;
            transition: color 0.3s;
        }
        .notice-item:hover .notice-text h4 { color: #1a5276; }

        /* ===== 编研展览 ===== */
        .section-exhibit {
            background: #fff;
            position: relative;
            overflow: hidden;
            margin:-280px auto 0px auto;
            max-width:1400px;
            padding:60px 20px 50px 20px;
        }
        .section-exhibit .section-header { justify-content: center; position: relative; }
        .section-exhibit .section-title {
            color: #8b1a1a;
            text-align: center;
            width: 100%;
        }
        .section-exhibit .section-title::after {
            background: #8b1a1a;
        }
        .section-exhibit .more-link { color: #000; opacity: 0.8; position: absolute; right: 0; transition: opacity 0.3s; }
        .section-exhibit .more-link:hover { opacity: 1; }
        .exhibit-bg-text {
            text-align: center;
            font-size: 48px;
            color: rgba(139,26,26,0.05);
            font-weight: bold;
            letter-spacing: 10px;
            position: absolute;
            top: 35px;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            pointer-events: none;
        }

        .exhibit-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            margin-top: 40px;
        }
        .exhibit-item {
            background: #fff;width: 250px;
            border-radius: 0px;
            overflow: hidden;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .exhibit-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.25);                    
        }
        .exhibit-item .exhibit-img {
            width: 250px;
            height: 340px;
            background: #efefef;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #f1c40f;
            font-size: 18px;
            position: relative;
            transition: transform 0.5s;
        }
        .exhibit-item:hover .exhibit-img { /*transform:translateY(-9px);*/ }
        .exhibit-img:hover { background: #c0392b; }
        .exhibit-item .exhibit-img::before {
            content: '';
            position: absolute;
            top: 20px;
            left: 20px;
            right: 20px;
            bottom: 20px;
            border: 1px solid rgba(241,196,15,0.3);
        }
        .exhibit-item .exhibit-info {
            padding: 12px;
            text-align: center;
        }
        .exhibit-item .exhibit-info h4 {
            font-size: 14px;
            color: #333;
            margin-bottom: 4px;
        }
        .exhibit-item .exhibit-info p {
            font-size: 11px;
            color: #999;
        }
        .exhibit-dots {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 10px;
        }
        .exhibit-dots span {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #e67e22;
            cursor: pointer;
            transition: transform 0.3s;
        }
        .exhibit-dots span:hover { transform: scale(1.3); }
        .exhibit-dots span.active { background: #d35400; }

        /* ===== 校史故事 ===== */
        .section-story {
            background: #9a231f;
            position: relative;
            overflow: hidden;
        }
        .section-story .section-header { justify-content: center; position: relative; }
        .section-story .section-title {
            color: #fff;
            text-align: center;
            width: 100%;
        }
        .section-story .section-title::after {
            background: #fff;
        }
        .section-story .more-link { color: #fff; opacity: 0.8; position: absolute; right: 0; transition: opacity 0.3s; }
        .section-story .more-link:hover { opacity: 1; }
        .story-bg-text {
            text-align: center;
            font-weight:bold;
            font-size: 48px;
            color: rgba(255,255,255,0.05);            
            letter-spacing: 10px;
            position: absolute;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            pointer-events: none;
        }

        .story-grid {
            display: grid;
            grid-template-columns: 0.8fr 0.8fr 1fr;
            gap: 20px;
            margin-top: 40px;
        }
        .story-grid a{
            background-color:#fff;height:50px;display:block;
         }
        .story-card {
            background: #fff;
            border-radius: 0px;
            overflow: hidden;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            height:400px;
        }
        .story-card:hover {
            transform: translateY(-9px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            border-bottom:5px solid  #004080;
        }
        .story-card .story-img {
            width: 100%;
            height: 230px;
            background: #ddd;
            position: relative;
            overflow: hidden;
        }
        .story-card .story-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .story-card:hover .story-img img { transform: scale(1.05); }
        .story-card .story-img .story-tag {
            position: absolute;
            top: 10px;
            left: 10px;
            background: #e74c3c;
            color: #fff;
            padding: 4px 10px;
            font-size: 12px;
            border-radius: 2px;
        }
        .story-card .story-content {
            padding: 15px;
        }
        .story-card .story-content .date {
            font-size: 14px;
            color: #1abc9c;            
            margin-bottom: 8px;
        }
        .story-card .story-content h4 {
            font-size: 14px;
            color: #333;
            line-height: 1.5;
            margin-bottom: 8px;
            transition: color 0.3s;
        }
        .story-card:hover .story-content h4 { color: #1a5276; }
        .story-card .story-content p {
            font-size: 14px;
            color: #999;
            line-height: 1.6;
        }
        .story-card .story-content .arrow {
            display: inline-block;
            margin-top: 10px;
            color: #1abc9c;
            font-size: 16px;
            transition: transform 0.3s;
        }
        .story-card:hover .story-content .arrow { transform: translateX(5px); }

        .story-list-card {
            background: #fff;
            border-radius: 0px;
            padding: 20px 0px;
        }
        .story-list-card .list-item {
            padding: 15px 30px;
            border-bottom: 1px solid #eee;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            cursor: pointer;
            transition: background 0.3s;
        }
        .story-list-card .list-item:hover {
            background: #efefef;
            color:#fff;
            margin: 0 0px;
            padding: 15px 30px;
            font-weight: bold;
            /*border-bottom:1px solid  #004080;*/
        }
        .story-list-card .list-item:last-child { border-bottom: none; }
        .story-list-card .list-item p {
            font-size: 14px;
            color: #000;
            line-height: 1.5;
            flex: 1;
            transition: color 0.3s;
        }
        .story-list-card .list-item:hover p { color: #004080; }
        .story-list-card .list-item .list-date {
            font-size: 14px;
            color: #999;
            min-width: 70px;
            text-align: right;
        }

        /* ===== 兰台青语 ===== */
        .section-lantai {
            /*background: #004080;*/
            position: relative;
            overflow: hidden;           
        }
        .section-lantai .section-header { justify-content: center; position: relative; }
        .section-lantai .section-title {
            color: #000;
            text-align: center;
            width: 100%;
        }
        .section-lantai .section-title::after {
            background: #000;
        }
        .section-lantai .more-link { color: #000; opacity: 0.8; position: absolute; right: 0; transition: color 0.3s; }
        .section-lantai .more-link:hover { opacity: 1; }
        .lantai-bg-text {
            text-align: center;
            font-size: 48px;
            color: rgb(0 0 0 / 5%);
            font-weight: bold;
            letter-spacing: 10px;
            position: absolute;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            pointer-events: none;
        }

        .lantai-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }
        .lantai-card {
            background: #fff;
            border-radius: 0px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .lantai-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            border-bottom:5px solid  #004080;
             margin:0px 0px -5px 0px;
        }
        .lantai-card .lantai-img {
            width: 100%;
            height: 200px;
            background: #ddd;
            position: relative;
            overflow: hidden;
        }
        .lantai-card .lantai-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .lantai-card:hover .lantai-img img { transform: scale(1.05); }
        .lantai-card .lantai-img .img-tag {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(0,0,0,0.6);
            color: #fff;
            padding: 3px 8px;
            font-size: 11px;
            border-radius: 2px;
        }
        .lantai-card .lantai-content {
            padding: 15px;
        }
        .lantai-card .lantai-content h4 {
            font-size: 14px;
            color: #333;
            line-height: 1.5;
            margin-bottom: 10px;
            transition: color 0.3s;
        }
        .lantai-card:hover .lantai-content h4 { color: #1a5276; }
        .lantai-card .lantai-content p {
            font-size: 11px;
            color: #999;
            line-height: 1.6;
        }
        .lantai-card .lantai-content .lantai-date {
            display: flex;
            align-items: center;
            gap: 5px;
            margin-top: 10px;
            font-size: 12px;
            color: #e74c3c;
        }
        .lantai-card .lantai-content .lantai-date .num { font-size: 16px; font-weight: bold; }

        /* ===== 快捷入口 ===== */
        .quick-links {
            padding: 60px 20px;
            background: #efefef;
        }
        .quick-links .container {
            display: flex;
            justify-content: center;
            gap: 100px;
            flex-wrap: wrap;
        }
        .quick-item {
            text-align: center;
            cursor: pointer;
        }
        .quick-item .quick-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            font-size: 30px;
            color: #555;
            transition: all 0.3s;
            border:1px solid #e9e7e7;
        }
        .quick-item:hover .quick-icon {
            background: #8B1A1A;
            color: #fff;
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(139,26,26,0.3);
        }
        .quick-item p {
            font-size: 13px;
            color: #666;
            transition: color 0.3s;
        }
        .quick-item:hover p { color: #8B1A1A; }

        /* ===== 页脚 ===== */
        .footer {
            background: #004080;
            padding: 30px 0px 0px 0px;
            color: #fff;
            border-top:5px solid #f1c40f;
        }
        .footer .container {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .footer-top {
            display: flex;
            align-items: flex-start;
            gap: 40px;
            margin-bottom: 20px;
            width: 100%;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 15px;
            flex-shrink: 0;
        }
        .footer-logo .logo-circle {
            width: 50px;
            height: 50px;
            border: 2px solid #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
        }
        .footer-logo h3 { font-size: 16px; }
        .footer-logo p { font-size: 10px; opacity: 0.7; }
        .footer-info {
            font-size: 12px;
            line-height: 2.5;
            color: rgba(255,255,255,0.8);
            text-align: right;
            flex: 1;
        }        
       .footer-info {
            font-size: 12px;
        }
        .footer-bottom {
            text-align: center;
            font-size: 12px;
            color: #fff;
            padding: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            width: 100%;
        }

        /* 模拟图片样式 */
        .sim-img {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
        }
        .sim-img.red {
            background: linear-gradient(135deg, #c0392b 0%, #8B1A1A 100%);
        }
        .sim-img.green {
            background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
        }
        .sim-img.blue {
            background: linear-gradient(135deg, #2980b9 0%, #3498db 100%);
        }
        .sim-img.orange {
            background: linear-gradient(135deg, #e67e22 0%, #f39c12 100%);
        }
        .sim-img.gray {
            background: linear-gradient(135deg, #7f8c8d 0%, #95a5a6 100%);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1200px) {
            .hero-content h2 { font-size: 56px; }
            .nav-left, .nav-right { gap: 20px; }
            .nav-center { margin: 0 30px; }
            .quick-links .container { gap: 40px; }
        }
        @media (max-width: 992px) {
            .main-nav { height: auto; padding: 10px 0; }
            .main-nav .container { flex-wrap: wrap; gap: 10px; }
            .nav-left, .nav-right { gap: 15px; flex-wrap: wrap; justify-content: center; }
            .nav-center { margin: 0 20px; order: -1; width: 100%; justify-content: center; }
            .work-grid { grid-template-columns: 1fr; }
            .notice-grid { grid-template-columns: repeat(2, 1fr); }
            .exhibit-grid { grid-template-columns: repeat(2, 1fr); }
            .story-grid { grid-template-columns: 1fr; }
            .lantai-grid { grid-template-columns: repeat(2, 1fr); }
            .hero-content h2 { font-size: 42px; }
            .footer-top { flex-direction: column; }
            .footer-info { text-align: center; }
        }
        @media (max-width: 768px) {
            .top-bar .container { justify-content: center; }
            .nav-item { font-size: 12px; }
            .nav-center .logo-text h1 { font-size: 14px; }
            .hero-banner { height: 320px; }
            .hero-content h2 { font-size: 32px; letter-spacing: 4px; }
            .hero-stars span { font-size: 16px; }
            .work-right { grid-template-columns: 1fr; }
            .notice-grid { grid-template-columns: 1fr; }
            .exhibit-grid { grid-template-columns: 1fr; }
            .lantai-grid { grid-template-columns: 1fr; }
            .section-header { flex-wrap: wrap; gap: 10px; }
            .more-link { position: static !important; }
            .quick-links .container { gap: 25px; }
            .quick-item .quick-icon { width: 44px; height: 44px; font-size: 16px; }
            .quick-item p { font-size: 12px; }
            .footer-info { font-size: 11px; }
        }
        @media (max-width: 1100px) {
            .mobile-menu-btn {
                display: flex;
            }
            .nav-left, .nav-right {
                display: none;
                position: fixed;
                top: 0;
                right: 0;
                width: 280px;
                height: 100vh;
                background: #2c3e50;
                flex-direction: column;
                padding: 80px 20px 20px;
                gap: 0;
                z-index: 400;
                overflow-y: auto;
                justify-content: flex-start;
                align-items: flex-end;
            }
            .nav-left.active, .nav-right.active {
                display: flex;
            }
            .nav-item {
                font-size: 16px;
                padding: 15px 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                width: 100%;
                text-align: right;
            }
            .nav-item .sub-nav {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                background: transparent;
                box-shadow: none;
                border-top: none;
                padding: 5px 0;
                display: none;
            }
            .nav-item .sub-nav.active {
                display: block;
            }
            .nav-item .sub-nav a {
                color: rgba(255,255,255,0.8);
                text-align: right;
                border-bottom: none;
                padding: 8px 0;
            }
            .nav-item .sub-nav a:hover {
                background: transparent;
                color: #fff;
            }
            .nav-center {
                margin: 0;
                order: -1;
                width: auto;
                flex: 1;
            }
            .main-nav .container {
                flex-wrap: wrap;
            }
            .mobile-icons {
                order: 0;
            }
            .mobile-menu-btn {
                order: 1;
            }
            .main-nav .container {
                justify-content: space-between;
            }
            .top-bar .icon-row {
                display: none;
            }
            .mobile-icons {
                display: flex;
                gap: 15px;
                margin-right: 15px;
            }
            .mobile-icons .icon-circle {
                width: 30px;
                height: 30px;
            }
            .mobile-icons .icon-circle svg {
                width: 16px;
                height: 16px;
                fill: #fff;
            }
        }
        @media (min-width: 1101px) {
            .mobile-icons {
                display: none;
            }
        }
        @media (max-width: 600px) {
            .main-nav .container {
                flex-wrap: wrap;
            }
            .nav-center {
                order: -1 !important;
                width: 100% !important;
                justify-content: center;
                margin-bottom: 10px;
            }
            .mobile-icons {
                order: 0;
            }
            .mobile-menu-btn {
                order: 1;
            }
        }
        @media (max-width: 480px) {
            .hero-content h2 { font-size: 24px; }
            .section-title { font-size: 20px; }
            .work-left .work-img { height: 200px; }
            .notice-item { flex-direction: column; gap: 8px; }
            .notice-date { display: flex; align-items: center; gap: 8px; }
            .notice-date .num { font-size: 20px; }
        }