* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #0a0a0f;
    color: #fff;
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    background: rgba(15, 15, 35, 0.95);
    border-bottom: 2px solid #00f7ff;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #00f7ff;
}

.logo-icon {
    font-size: 32px;
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(180deg); }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 8px 16px;
    border-radius: 5px;
    transition: all 0.3s;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #00f7ff;
    transition: all 0.3s;
    transform: translateX(-50%);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #00f7ff;
}

/* 轮播图 */
.slider {
    position: relative;
    height: 500px;
    overflow: hidden;
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a3a 100%);
}

.slider-container {
    position: relative;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 247, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 0, 255, 0.1) 0%, transparent 50%);
}

.slide.active {
    opacity: 1;
}

.slide-content {
    text-align: center;
    max-width: 800px;
    padding: 40px;
}

.slide-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #00f7ff;
    text-shadow: 0 0 20px rgba(0, 247, 255, 0.5);
    animation: slideIn 1s;
}

.slide-content p {
    font-size: 20px;
    color: #aaa;
    animation: slideIn 1s 0.2s backwards;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background: #00f7ff;
    box-shadow: 0 0 10px #00f7ff;
}

/* 公告区域 */
.announcements {
    position: relative;
    height: 543px;
    overflow: hidden;
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a3a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.announcements .container {
    width: 1342px;
    margin: 0 auto;
    display: flex;
    gap: 0;
}

.announcement-card {
    width: 447.33px;
    height: 543px;
    background: rgba(15, 15, 35, 0.8);
    border: 1px solid #333;
    padding: 30px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.announcement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 247, 255, 0.1), transparent);
    transition: left 0.5s;
}

.announcement-card:hover::before {
    left: 100%;
}

.announcement-card:hover {
    border-color: #00f7ff;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 247, 255, 0.2);
}

.card-icon {
    font-size: 40px;
    margin-bottom: 15px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    width: 100%;
}

.card-icon img {
    max-width: 80px;
    max-height: 80px;
    object-fit: contain;
}

.announcement-card h3 {
    font-size: 20px;
    color: #00f7ff;
    margin-bottom: 15px;
    text-align: center;
}

.announcement-card p {
    color: #aaa;
    line-height: 1.6;
    margin-bottom: 15px;
    text-align: center;
}

.date {
    font-size: 12px;
    color: #666;
    text-align: center;
}

/* 底部 */
.footer {
    background: rgba(15, 15, 35, 0.95);
    border-top: 2px solid #00f7ff;
    padding: 50px 20px 20px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: #00f7ff;
    margin-bottom: 15px;
    font-size: 18px;
}

.footer-section p {
    color: #aaa;
    line-height: 1.8;
    font-size: 14px;
}

.qrcode {
    text-align: center;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: rgba(0, 247, 255, 0.1);
    border: 2px solid #00f7ff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.qr-placeholder span {
    color: #00f7ff;
    font-size: 14px;
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 20px;
    border-top: 1px solid #333;
    text-align: center;
    color: #666;
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        gap: 20px;
    }

    .slide-content h2 {
        font-size: 32px;
    }

    .announcements .container {
        width: 100%;
        flex-direction: column;
        padding: 20px;
    }

    .announcement-card {
        width: 100%;
        height: auto;
        min-height: 200px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 15px;
        gap: 10px;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    .nav-menu a {
        font-size: 14px;
        padding: 6px 12px;
    }

    .logo {
        font-size: 20px;
    }

    .logo-icon {
        font-size: 26px;
    }

    .slider {
        height: 300px;
    }

    .slide-content {
        padding: 20px;
    }

    .slide-content h2 {
        font-size: 24px;
    }

    .slide-content p {
        font-size: 16px;
    }

    .announcements {
        height: auto;
        padding: 20px 0;
    }

    .announcement-card {
        padding: 20px;
    }

    .announcement-card h3 {
        font-size: 18px;
    }

    .footer {
        padding: 30px 15px 15px;
    }

    .footer-content {
        gap: 25px;
    }

    .footer-section h4 {
        font-size: 16px;
    }

    .footer-section p {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .nav-menu a {
        font-size: 12px;
        padding: 5px 8px;
    }

    .logo {
        font-size: 18px;
    }

    .slider {
        height: 250px;
    }

    .slide-content h2 {
        font-size: 20px;
    }

    .slide-content p {
        font-size: 14px;
    }

    .card-icon {
        font-size: 30px;
    }

    .qr-placeholder {
        width: 100px;
        height: 100px;
    }
}