:root {
    --primary-color: #00bcd4;
    --secondary-color: #1a2634;
    --accent-color: #ff5722;
    --text-color: #e0e0e0;
    --dark-bg: #121921;
    --card-bg: rgba(26, 38, 52, 0.8);
    --glow-color: rgba(0, 188, 212, 0.6);
}

@font-face {
    font-family: 'Cyberpunk';
    src: url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;700&display=swap');
}

body {
    font-family: 'Segoe UI', 'PingFang SC', sans-serif;
    background-color: var(--dark-bg);
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(0, 188, 212, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 87, 34, 0.1) 0%, transparent 50%);
    color: var(--text-color);
    position: relative;
    min-height: 100vh;
}

.tech-border {
    position: relative;
    border: 1px solid rgba(0, 188, 212, 0.3);
    border-radius: 4px;
    overflow: hidden;
}

.tech-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 188, 212, 0.2), transparent);
    animation: tech-border-glow 3s infinite;
}

@keyframes tech-border-glow {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.navbar {
    background-color: rgba(26, 38, 52, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 188, 212, 0.2);
    border-bottom: 1px solid rgba(0, 188, 212, 0.3);
}

.navbar-brand {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary-color) !important;
    text-shadow: 0 0 10px rgba(0, 188, 212, 0.5);
}

.nav-link {
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: all 0.3s;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active::after {
    width: 80%;
    box-shadow: 0 0 10px var(--primary-color);
}

.hero-section {
    background: linear-gradient(135deg, rgba(26, 38, 52, 0.9), rgba(18, 25, 33, 0.9)),
                url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-1.2.1&auto=format&fit=crop&w=1352&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 100px 0;
    margin-bottom: 50px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 188, 212, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(255, 87, 34, 0.15) 0%, transparent 50%);
}

.hero-section h1 {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    text-shadow: 0 0 20px rgba(0, 188, 212, 0.8);
    letter-spacing: 2px;
}

.hero-glow {
    text-shadow: 0 0 10px var(--glow-color);
}

.card {
    background-color: var(--card-bg);
    border: 1px solid rgba(0, 188, 212, 0.3);
    border-radius: 8px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(5px);
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    background: linear-gradient(45deg, 
        rgba(0, 188, 212, 0), 
        rgba(0, 188, 212, 0.5), 
        rgba(0, 188, 212, 0));
    z-index: -1;
    animation: border-glow 3s infinite;
}

@keyframes border-glow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 188, 212, 0.4);
}

.card-title {
    color: var(--primary-color);
    font-weight: 600;
}

.card-img-top {
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid rgba(0, 188, 212, 0.3);
}

.badge {
    padding: 6px 10px;
    border-radius: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.footer {
    background-color: rgba(18, 25, 33, 0.95);
    color: var(--text-color);
    padding: 50px 0 30px;
    margin-top: 80px;
    border-top: 1px solid rgba(0, 188, 212, 0.3);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 90%, rgba(0, 188, 212, 0.1) 0%, transparent 30%),
        radial-gradient(circle at 90% 10%, rgba(255, 87, 34, 0.1) 0%, transparent 30%);
    pointer-events: none;
}

.footer h5 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

/* 管理员按钮样式 */
.admin-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(0, 188, 212, 0.5);
    transition: all 0.3s;
    border: 1px solid rgba(0, 188, 212, 0.5);
}

.admin-button:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 0 30px rgba(0, 188, 212, 0.8);
}

.admin-button i {
    font-size: 24px;
}

/* 管理员登录模态框样式 */
.modal-content {
    background-color: var(--secondary-color);
    border: 1px solid rgba(0, 188, 212, 0.5);
    border