:root {
    --primary-dark: #0f2027;
    --primary-mid: #203a43;
    --primary-light: #2c5364;
    --accent-green: #27ae60;
    --accent-orange: #f39c12;
    --neutral-light: #ecf0f1;
    --neutral-dark: #34495e;
    --shadow-base: 0 4px 6px rgba(0,0,0,0.1);
    --transition-base: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    background: radial-gradient(circle at 20% 30%, var(--primary-mid), var(--primary-dark));
    color: var(--neutral-light);
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

header {
    background: linear-gradient(90deg, rgba(28, 40, 51, 0.9), rgba(44, 62, 80, 0.95));
    backdrop-filter: blur(8px);
    position: fixed;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    padding: 1rem 0;
}

.notice-banner {
    background: linear-gradient(90deg, var(--accent-orange), #e67e22);
    color: white;
    text-align: center;
    padding: 0.8rem;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 30px 60px;
}

.hero-section {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
    padding: 40px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: var(--shadow-base);
}

.hero-text {
    flex: 1;
}

.hero-image {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    transition: var(--transition-base);
    filter: brightness(0.9);
}

.hero-image img:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 12px 24px rgba(0,0,0,0.3);
    filter: brightness(1);
}

h1, h2, h3, h4 {
    font-weight: 600;
    margin-top: 2rem;
    position: relative;
}

h1 {
    font-size: 2.5rem;
    color: var(--neutral-light);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 1.8rem;
    color: var(--accent-green);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-green);
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--neutral-light);
    margin-bottom: 1rem;
}

p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

article {
    background: rgba(44, 62, 80, 0.7);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 60px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
}

pre {
    background: #1e2b38;
    border-radius: 8px;
    padding: 20px;
    overflow: auto;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
    margin: 1.5rem 0;
    border-left: 4px solid var(--accent-green);
}

code {
    font-family: 'Courier New', monospace;
    color: #f8f8f2;
    font-size: 0.95rem;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-light);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--neutral-light);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    transition: var(--transition-base);
}

.nav-link:hover {
    color: var(--accent-green);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-green);
    transition: var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.card {
    background: rgba(52, 73, 94, 0.7);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-base);
    transition: var(--transition-base);
    border: 1px solid rgba(255,255,255,0.1);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
    background: rgba(52, 73, 94, 0.9);
}

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.footer {
    text-align: center;
    padding: 30px;
    margin-top: 60px;
    background: rgba(28, 40, 51, 0.8);
    border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 992px) {
    .hero-section {
        flex-direction: column;
    }
    .nav-menu {
        gap: 15px;
    }
}

@media (max-width: 768px) {
    .main-container {
        padding: 100px 20px 40px;
    }
    article {
        padding: 25px;
    }
    .navbar {
        padding: 0 20px;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.floating {
    animation: float 3s ease-in-out infinite;
}