* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: bold;
    background: #f8fafc;
    color: #1e2a44;
    line-height: 1.6;
    overflow-x: hidden;
}
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}
header {
    text-align: center;
    padding: 100px 0 60px;
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    position: relative;
}
header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #1e2a44;
    opacity: 0;
    transform: translateY(30px);
    animation: slideIn 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
header p {
    font-size: 1.5rem;
    letter-spacing: -0.03em;
    color: #1e2a44;
    opacity: 0;
    transform: translateY(30px);
    animation: slideIn 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
.announcement {
    background: linear-gradient(135deg, #e1f6f8 0%, #e9fdfd 100%);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 48px;
    box-shadow: 0 8px 24px rgba(30, 42, 68, 0.08);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: scale(0.95);
    animation: popIn 0.7s cubic-bezier(0.25, 0.8, 0.25, 1) 0.2s forwards;
}
.announcement::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.3) 0%, transparent 50%);
    opacity: 0.5;
}
.announcement h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e4344;
    margin-bottom: 12px;
}
.announcement p {
    font-size: 1.1rem;
    color: #388d8d;
}
.links-section, .groups-section {
    margin-bottom: 64px;
}
.links-section h2, .groups-section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #1e2a44;
    margin-bottom: 24px;
    opacity: 0;
    transform: translateX(-20px);
    animation: slideIn 0.7s cubic-bezier(0.25, 0.8, 0.25, 1) 0.4s forwards;
}
.link-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: 0 4px 16px rgba(30, 42, 68, 0.06);
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.4s;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.7s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
.link-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(79, 243, 255, 0.164);
}
.link-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e2a44;
    margin-bottom: 8px;
}
.link-info p {
    font-size: 1rem;
    color: #6b7280;
    margin-bottom: 8px;
}
.link-info a {
    display: inline-block;
    font-size: 1rem;
    color: #3ecece;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    background: rgba(59, 130, 246, 0.1);
    transition: background 0.3s, color 0.3s;
}
.link-info a:hover {
    background: #2df3d2;
    color: #ffffff;
}
footer {
    text-align: center;
    padding: 48px 0;
    color: #6b7280;
    font-size: 0.9rem;
    opacity: 0;
    animation: fadeIn 1s ease-out 0.6s forwards;
}
@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateY(0) translateX(0);
    }
}
@keyframes popIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}
@keyframes fadeIn {
    to {
        opacity: 1;
    }
}
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    header p {
        font-size: 1.2rem;
    }
    .announcement h2, .links-section h2, .groups-section h2 {
        font-size: 1.5rem;
    }
    .link-card {
        padding: 20px;
    }
}