/* a.html 专属样式 */
body {
    font-family: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
    background: #f5f7fa;
    color: #222;
    min-height: 100vh;
}

.navbar {
    background: #223a5e;
    color: #fff;
    box-shadow: 0 2px 8px rgba(34,58,94,0.08);
    padding: 0 0;
}
.navbar-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    padding: 0 24px;
}
.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 1px;
}
.navbar-menu {
    list-style: none;
    display: flex;
    gap: 32px;
}
.navbar-menu li a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s;
}
.navbar-menu li a:hover {
    color: #ffb400;
}

.container {
    max-width: 800px;
    margin: 40px auto 0 auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 24px rgba(34,58,94,0.08);
    padding: 32px 24px 24px 24px;
}
.header {
    text-align: center;
    margin-bottom: 16px;
}

.intro-section {
    margin-bottom: 32px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e0e6ed;
}
.lead {
    font-size: 1.18rem;
    color: #223a5e;
    font-weight: 500;
    margin-top: 12px;
    margin-bottom: 0;
}
.blog-purpose-section,
.notice-section,
.contact-section {
    margin-bottom: 32px;
    padding: 18px 0 0 0;
}
.blog-purpose-section h2,
.notice-section h2,
.contact-section h2 {
    font-size: 1.25rem;
    color: #223a5e;
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.key-points {
    margin: 12px 0 0 18px;
    padding-left: 0;
}
.key-points li {
    font-size: 1.05rem;
    color: #2d3a4d;
    margin-bottom: 6px;
    list-style: disc inside;
}
.footer {
    text-align: center;
    margin-top: 36px;
    font-size: 0.95rem;
    color: #888;
    border-top: 1px solid #e0e6ed;
    padding-top: 18px;
}
@media (max-width: 900px) {
    .container {
        margin: 24px 8px 0 8px;
        padding: 20px 8px 16px 8px;
    }
    .navbar-container {
        padding: 0 8px;
    }
}
@media (max-width: 600px) {
    .navbar-container {
        flex-direction: column;
        height: auto;
        gap: 8px;
        align-items: flex-start;
    }
    .navbar-menu {
        gap: 16px;
    }
    .container {
        padding: 12px 2px 8px 2px;
    }
    .content h1 {
        font-size: 1.3rem;
    }
    .footer {
        font-size: 0.85rem;
    }
    .intro-section, .blog-purpose-section, .notice-section, .contact-section {
        margin-bottom: 18px;
        padding: 8px 0 0 0;
    }
    .blog-purpose-section h2,
    .notice-section h2,
    .contact-section h2 {
        font-size: 1.05rem;
    }
    .lead {
        font-size: 1rem;
    }
    .key-points li {
        font-size: 0.98rem;
    }
}