.about-content {
    max-width: 800px;
    margin: 40px auto 0 auto;
    background: rgba(34,48,74,0.92);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(34,48,74,0.18);
    padding: 40px 32px 32px 32px;
    font-size: 1.15em;
    color: #eee;
}
.about-content h2 {
    font-size: 2.1em;
    margin-bottom: 0.5em;
    color: #64ffda;
}
.about-content h3 {
    margin-top: 2em;
    color: #ffd700;
    font-size: 1.3em;
}
.about-content ul {
    margin: 1em 0 1em 2em;
    padding-left: 1.2em;
}
.about-content li {
    margin-bottom: 0.5em;
}
.about-content a {
    color: #64ffda;
    text-decoration: underline;
}
.about-content p, .about-content ul {
    line-height: 1.7;
}
.header img {
    max-width: 100%;
    height: auto;
}
.doc-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 260px;
    background: #22304a;
    border-right: 1px solid #1a2233;
    padding: 32px 18px 18px 18px;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}
.doc-sidebar h2 {
    color: #ffd700;
    font-size: 1.3em;
    margin-bottom: 1em;
}
.doc-section {
    margin-bottom: 1.5em;
}
.doc-section h3 {
    color: #64ffda;
    font-size: 1.1em;
    margin-bottom: 0.5em;
}
.doc-section ul {
    list-style: none;
    padding-left: 0;
}
.doc-section ul li {
    margin-bottom: 0.5em;
}
.doc-section a {
    color: #64ffda;
    text-decoration: none;
}
.doc-section a:hover {
    text-decoration: underline;
}
body {
    margin-left: 270px;
}
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1100;
    background: #22304a;
    color: #ffd700;
    border: none;
    font-size: 2em;
    border-radius: 6px;
    padding: 6px 12px;
    cursor: pointer;
}
@media (max-width: 900px) {
    body {
        margin-left: 0;
    }
    .doc-sidebar {
        transform: translateX(-100%);
    }
    .doc-sidebar.active {
        transform: translateX(0);
    }
    .sidebar-toggle {
        display: block;
    }
}
@media (max-width: 600px) {
    .about-content {
        padding: 14px 2vw 14px 2vw;
        font-size: 0.98em;
    }
    .header {
        text-align: center;
        margin-top: 12px;
    }
    .header img {
        width: 90vw;
        max-width: 320px;
        height: auto;
    }
    .footer-bar {
        font-size: 0.95em;
        padding: 10px 0;
    }
}