:root {
    --primary-color: #FD6312;
    --secondary-color: #3FA9F5;
    --bg-color: #F4F9FD;
    --container-bg: #ffffff;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #e2e8f0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-main);
    background-color: var(--bg-color);
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    background-color: var(--container-bg);
    padding: 50px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    border-top: 6px solid var(--primary-color);
}

h1 {
    color: var(--primary-color);
    font-size: 2.4rem;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

h2 {
    color: var(--text-main);
    font-size: 1.6rem;
    margin-top: 35px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--secondary-color);
    display: inline-block;
    padding-right: 20px;
}

h3 {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-top: 20px;
    margin-bottom: 10px;
}

p {
    margin-bottom: 16px;
    color: var(--text-muted);
}

ul {
    margin-bottom: 20px;
    padding-left: 25px;
    color: var(--text-muted);
}

li {
    margin-bottom: 10px;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

strong {
    color: var(--text-main);
}

.doc-header {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.meta-text {
    font-size: 0.95rem;
    color: var(--text-muted);
}

address {
    font-style: normal;
    background: #f9fafb;
    padding: 20px;
    border-left: 4px solid var(--secondary-color);
    border-radius: 0 4px 4px 0;
    color: var(--text-muted);
}

.doc-footer {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.9rem;
    color: #9ca3af;
}

#scrollToTopBtn {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 99;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 20px;
    box-shadow: 0 4px 10px rgba(253, 99, 18, 0.4);
    transition: transform 0.3s ease, background-color 0.3s;
}

#scrollToTopBtn:hover {
    background-color: #e0550e;
    transform: translateY(-3px);
}

@media (max-width: 600px) {
    .container {
        margin: 10px auto;
        padding: 25px;
    }

    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.4rem;
        width: 100%;
        display: block;
    }
}