.article-content {
    display: flex;
    justify-content: center;
    background: #fff;
    padding-bottom: 50px;
}

.article-content-box {
    max-width: 760px;
    margin: 0 auto;
    padding: 100px 0 50px;
    color: #333;
    font-size: 16px;
    line-height: 1.95;
    letter-spacing: 0.02em;
    word-break: break-word;
}

.article-content-box h1 {
    font-size: 2.2rem;
    line-height: 1.45;
    margin: 0 0 28px;
    font-weight: 700;
    color: #14213d;
    letter-spacing: 0.01em;
}

.article-content-box h2 {
    font-size: 1.55rem;
    line-height: 1.5;
    margin: 56px 0 20px;
    padding: 0 0 10px 0.2em;
    font-weight: 700;
    color: #14213d;
    border-bottom: 2px solid #dbe4ee;
    position: relative;
}

.article-content-box h2::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 72px;
    height: 2px;
    background: #4f8cc9;
}

.article-content-box h3 {
    color: #14213d;
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 30px;
    margin-bottom: 10px;
    border-left: 3px solid #4f8cc9;
    padding-left: 10px;
}

.article-content-box p {
    margin: 0 0 18px;
}

.article-content-box ul,
.article-content-box ol {
    margin: 0 0 24px;
    padding: 0;
}

.article-content-box ul {
    list-style: none;
}

.article-content-box ul li {
    position: relative;
    margin-bottom: 12px;
    padding: 4px 0 10px 1.8em;
    border-bottom: 1px dashed #e6edf3;
}

.article-content-box ul li::before {
    content: "";
    position: absolute;
    left: 0.2em;
    top: 0.9em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f8cc9, #7bb4eb);
    box-shadow: 0 0 0 4px rgba(79, 140, 201, 0.12);
}

.article-content-box ol {
    padding-left: 1.6em;
}

.article-content-box ol li {
    margin-bottom: 12px;
    padding-left: 0.2em;
}

.article-content-box strong {
    font-weight: 700;
    color: #111;
    background: linear-gradient(transparent 60%, rgba(79, 140, 201, 0.18) 60%);
}

.article-content-box a {
    color: #2166a5;
    text-decoration: underline;
    text-decoration-color: rgba(33, 102, 165, 0.35);
    text-underline-offset: 3px;
    transition: 0.2s ease;
}

.article-content-box a:hover {
    opacity: 0.85;
    text-decoration-color: rgba(33, 102, 165, 0.7);
}

.article-content-box table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 0.96rem;
    background: #fff;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(20, 33, 61, 0.05);
}

.article-content-box th,
.article-content-box td {
    border: 1px solid #d9e0e6;
    padding: 14px 16px;
    text-align: left;
    vertical-align: top;
    line-height: 1.75;
}

.article-content-box th {
    background: #eef5fb;
    color: #14213d;
    font-weight: 700;
}

.article-content-box tr:nth-child(even) td {
    background: #fafcff;
}

.article-content-box img {
    max-width: 100%;
    height: auto;
    margin: 28px auto;
}

.article-content-box blockquote {
    margin: 28px 0;
    padding: 18px 22px;
    border-left: 4px solid #4f8cc9;
    background: linear-gradient(180deg, #f7fbff 0%, #f3f8fc 100%);
    color: #444;
    border-radius: 6px;
}

.article-content-box hr {
    border: 0;
    border-top: 1px solid #e5e7eb;
    margin: 40px 0;
}

h2.relate-posts {
    font-size: 1.55rem;
    font-weight: bold;
    padding: 10px 0;
    margin-top: 50px;
    border-bottom: 1px solid #e5e7eb;
    margin-bottom: 20px;
}

span.crp_title {
    text-align: left !important;
    padding: 10px !important;
}

p.ez-toc-title {
    font-weight: normal !important;
    color: #333 !important;
    margin-bottom: 5px !important;
}

div#ez-toc-container ul.ez-toc-list a {
    padding: 5px 10px;
}

div#ez-toc-container ul.ez-toc-list a::before {
    display: none;
}

li.ez-toc-page-1.ez-toc-heading-level-2::before {
    display: none;
}

div#ez-toc-container nav ul ul li::before {
    display: none;
}

.article-content form.wpcf7-form.init {
    padding: 0;
}

/* お問い合わせ */
.iin-contact-box {
    max-width: 640px;
    margin: 0;
    padding: 20px;
    border-radius: 10px;
    background: #f8fafc;
}

.iin-contact-box label {
    display: block;
    margin-bottom: 20px;
    font-weight: 600;
    line-height: 1.8;
}

.iin-contact-box input,
.iin-contact-box textarea {
    width: 100%;
    margin-top: 8px;
    padding: 12px 14px;
    border: 1px solid #dcdcdc;
    border-radius: 8px;
    background: #fff;
    font-size: 16px;
    box-sizing: border-box;
}

.iin-contact-box textarea {
    min-height: 160px;
    resize: vertical;
}

.iin-contact-box input:focus,
.iin-contact-box textarea:focus {
    outline: none;
    border-color: #666;
}

.iin-contact-box .btn-gradient,
.iin-contact-box input[type="submit"] {
    display: inline-block;
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: 9999px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.iin-contact-box .btn-gradient:hover,
.iin-contact-box input[type="submit"]:hover {
    opacity: 0.9;
}

@media (max-width: 768px) {
    .article-content-box {
        max-width: 100%;
        padding: 88px 0 40px;
        font-size: 15px;
        line-height: 1.9;
    }

    .article-content-box>div {
        padding: 88px 0 40px;
    }

    .article-content-box h1 {
        font-size: 1.5rem;
        margin-bottom: 22px;
    }

    .article-content-box h2 {
        font-size: 1.3rem;
        margin: 40px 0 16px;
        padding-bottom: 8px;
    }

    .article-content-box p {
        margin-bottom: 16px;
    }

    .article-content-box ul li,
    .article-content-box ol li {
        margin-bottom: 10px;
    }

    .article-content-box th,
    .article-content-box td {
        padding: 11px 12px;
        font-size: 0.94rem;
    }

    .article-content-box blockquote {
        padding: 14px 16px;
    }
}