.sub-nav {
    background: #0a0a0a;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 72px;
    /* Header高さに合わせ調整 */
    z-index: 999;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.sub-nav-list {
    display: flex;
    list-style: none;
    justify-content: center;
    gap: 40px;
}

.sub-nav-list a {
    display: block;
    padding: 18px 0;
    color: var(--white);
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.1em;
    transition: 0.3s;
    border-bottom: 3px solid transparent;
}

.sub-nav-list li.active a {
    color: var(--gold-solid);
    border-bottom-color: var(--gold-solid);
}

.sub-nav-list a:hover {
    color: var(--gold-solid);
}

.steps {
    padding: 100px 0;
    background: var(--soft-gray);
    text-align: center;
}

.reasons {
    padding: 120px 0;
}


.reason-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.reason-card {
    background: var(--soft-gray);
    padding: 50px;
    border-radius: 4px;
    border-top: 5px solid var(--black);
}

.reason-card h4 {
    font-size: 20px;
    font-weight: 900;
    margin-bottom: 20px;
    color: var(--gold-solid);
}

.cta-area {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin: 50px 0;
}

@media (max-width: 900px) {
    .reason-grid {
        grid-template-columns: 1fr;
    }

    .sub-nav-list {
        gap: 20px;
    }

    .sub-nav {
        top: 72px;
    }
}

/* film.html
------------------------------------------ */
.catch-images {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin: 40px 0;
}

.catch-images img {
    max-width: 300px;
    border: 1px solid #333;
}

.hero-title {
    font-size: clamp(24px, 4vw, 42px);
    margin-bottom: 20px;
    line-height: 1.4;
}

.sub-copy {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.section-padding {
    padding: 100px 0;
}

/* Durability Grid */
.durability-container {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.durability-title {
    font-size: 24px;
    margin-bottom: 30px;
    line-height: 1.5;
}

.durability-main {
    max-width: 800px;
    margin: 0 auto 30px;
    border: 4px solid var(--black);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.durability-description {
    margin: 20px auto 60px;
    font-weight: 700;
    line-height: 1.8;
    max-width: 700px;
}

.test-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 40px;
    text-align: left;
}

.test-item {
    background: var(--soft-gray);
    padding: 25px;
    border-top: 3px solid var(--black);
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.test-item img {
    margin-bottom: 20px;
    width: 100%;
    height: auto;
    border: 1px solid #eee;
    flex-grow: 0;
}

.test-label {
    font-weight: 900;
    font-size: 18px;
    margin-bottom: 12px;
    border-left: 5px solid var(--gold-solid);
    padding-left: 12px;
    color: var(--black);
}

.test-label:after {
    display: none;
}

.test-item-desc {
    font-size: 14px;
    line-height: 1.7;
    color: #555;
    flex-grow: 1;
}

/* Detail Blocks */
.detail-block {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 100px;
}

.detail-block:nth-child(even) .detail-text {
    order: 2;
}

.detail-block:nth-child(even) .visual-container {
    order: 1;
}

.detail-text h3 {
    font-size: 24px;
    margin-bottom: 20px;
    font-family: 'Noto Serif JP', serif;
}

.visual-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.media-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.media-item p {
    font-size: 13px;
    font-weight: 700;
    color: var(--deep-gray);
    border-bottom: 1px solid #eee;
    padding-bottom: 5px;
}

.media-item h3 {
    font-size: 18px;
    color: var(--deep-gray);
    border-bottom: 1px solid #eee;
    padding-bottom: 5px;
}

.media-item img {
    border: 1px solid #eee;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.square-photo-wrap {
    max-width: 120px;
    margin-top: 30px;
    border: 1px solid var(--border);
    padding: 5px;
    background: #fff;
}

/* Lineup Section */
.lineup {
    padding: 120px 0;
    background: var(--black);
    color: var(--white);
}

.lineup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.lineup-card {
    background: #080808;
    border: 1px solid #333;
    padding: 40px 30px;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
}

.lineup-img {
    margin-bottom: 30px;
    border: 1px solid #222;
}

.lineup-name {
    font-size: 20px;
    font-weight: 900;
    color: var(--gold-solid);
    margin-bottom: 20px;
    text-align: center;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lineup-desc {
    font-size: 15px;
    opacity: 0.9;
    flex-grow: 1;
}

.lineup-grid-film {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.lineup-card-film {
    border: 1px solid #eee;
    padding: 25px;
    transition: 0.3s;
    text-align: center;
}

.lineup-card-film:hover {
    border-color: var(--gold-solid);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.lineup-card-film .lineup-name {
    font-size: 16px;
}

@media (max-width: 800px) {

    .catch-images,
    .test-grid,
    .detail-block {
        grid-template-columns: 1fr !important;
        flex-direction: column;
    }

    .visual-container {
        order: 2 !important;
        margin-top: 30px;
        grid-template-columns: 1fr !important;
    }

    .detail-text {
        order: 1 !important;
    }

    .test-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

}

/* hfs
------------------------------------------ */
.hfs-wrap .hero {
    background: var(--black);
    color: var(--white);
    padding: 100px 0 80px;
    text-align: center;
}

.hfs-wrap .hero-img {
    max-width: 800px;
    margin: 40px auto;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.hfs-wrap .hero-title {
    font-size: clamp(30px, 5vw, 50px);
    margin-bottom: 20px;
    line-height: 1.4;
}

.hfs-wrap .hero-copy {
    font-size: 20px;
    color: var(--gold);
    font-weight: 700;
    margin-bottom: 30px;
}


.article-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 100px;
}


.how-visual {
    margin-bottom: 60px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.how-steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    align-items: start;
}

.step-card {
    background: var(--soft-gray);
    padding: 30px;
    border-radius: 4px;
    border-top: 4px solid var(--gold);
    height: 100%;
    transition: 0.3s;
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.step-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--black);
    font-family: 'Noto Serif JP', serif;
    font-weight: 900;
}

.step-card p {
    font-size: 14px;
    line-height: 1.7;
    color: #555;
}

.vs-section {
    background: var(--soft-gray);
}

.vs-table-wrapper {
    overflow-x: auto;
    margin-top: 40px;
}

.vs-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.vs-table th,
.vs-table td {
    padding: 25px;
    border: 1px solid #eee;
    text-align: left;
}

.vs-table th {
    background: var(--black);
    color: var(--gold);
    font-weight: 900;
}

.vs-table tr td:first-child {
    background: var(--off-white);
    font-weight: 700;
    width: 20%;
}

.vs-table td:nth-child(3) {
    background: #fffdf5;
    border-left: 2px solid var(--gold);
}

.text-content h3 {
    font-size: 24px;
    margin-bottom: 25px;
    border-left: 4px solid var(--gold);
    padding-left: 20px;
}

.text-content p {
    margin-bottom: 20px;
    color: #444;
}

@media (max-width: 900px) {
    #faq .faq-shell {
        padding: 20px;
    }

    #faq .faq-layout {
        grid-template-columns: 1fr;
    }

    #faq .faq-list {
        max-height: 360px;
    }

    #faq .faq-answer-panel {
        min-height: auto;
        padding: 28px 22px;
    }

    #faq .faq-answer-title {
        font-size: 23px;
    }

    .text-content h3 {
        font-size: 1.5rem;
    }

    .how-steps-grid {
        grid-template-columns: 1fr;
    }

    .article-block {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 60px;
    }

    .vs-table {
        width: 600px;
    }
}

/* contact
----------------------------------------- */
.contact-wrap .hero {
    background: var(--black);
    color: var(--white);
    padding: 50px 0 80px;
    text-align: center;
}

.contact-wrap .hero-title {
    font-size: clamp(30px, 5vw, 44px);
    font-family: 'Noto Serif JP', serif;
    margin-bottom: 30px;
    line-height: 1.4;
    color: var(--white);
}

.contact-wrap .hero-sub {
    font-size: 18px;
    margin-bottom: 50px;
    color: var(--gold);
    font-weight: 700;
}

.contact-wrap .intro-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    background: rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-left: 4px solid var(--gold);
}

.form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 60px;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

.form-group {
    margin-bottom: 30px;
}

.form-label {
    display: block;
    font-weight: 700;
    margin-bottom: 10px;
    font-size: 15px;
}

.form-label span {
    color: #cc0000;
    font-size: 12px;
    margin-left: 10px;
    vertical-align: middle;
}

/* 必須・任意ラベルの文字色を白で固定 */
.required-label {
    background: #cc0000;
    color: #ffffff !important;
    padding: 2px 6px;
    border-radius: 2px;
    font-size: 11px;
}

.optional-label {
    background: #999;
    color: #ffffff !important;
    padding: 2px 6px;
    border-radius: 2px;
    font-size: 11px;
}

.form-control {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 16px;
    transition: 0.3s;
}

.form-control:focus {
    border-color: var(--gold);
    outline: none;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.1);
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.submit-area {
    text-align: center;
    margin-top: 50px;
}

.btn-submit {
    background: var(--gold-gradient);
    color: var(--black);
    border: none;
    padding: 25px 60px;
    font-size: 18px;
    font-weight: 900;
    cursor: pointer;
    transition: 0.4s;
    border-radius: 4px;
    box-shadow: 0 15px 35px rgba(212, 175, 55, 0.3);
    letter-spacing: 0.1em;
    width: 100%;
}

.btn-submit:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 45px rgba(212, 175, 55, 0.5);
}

.submit-note {
    margin-top: 20px;
    font-size: 13px;
    color: #666;
    font-weight: 500;
}

@media (max-width: 850px) {
    .form-wrapper {
        padding: 30px;
    }
}

/* Single Post Specific Styles */
.single-post-header {
    text-align: center;
    margin-bottom: 60px;
}

.single-post-meta {
    font-size: 14px;
    font-weight: 700;
    color: #888;
    letter-spacing: 0.1em;
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

.post-category {
    display: flex;
    gap: 8px;
}

.post-category a {
    background: var(--gold-solid);
    color: var(--black);
    padding: 3px 12px;
    font-size: 10px;
    border-radius: 2px;
    text-decoration: none;
    font-weight: 900;
    transition: 0.3s;
    line-height: 1;
    display: inline-block;
}

.post-category a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.single-entry-content {
    max-width: 800px;
    margin: 0 auto;
}

.featured-image-full {
    margin-bottom: 50px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.single-entry-content h2 {
    font-size: 28px;
    font-family: 'Noto Serif JP', serif;
    margin: 60px 0 30px;
    border-left: 5px solid var(--gold-solid);
    padding-left: 20px;
    line-height: 1.4;
}

.single-entry-content h3 {
    font-size: 22px;
    font-family: 'Noto Serif JP', serif;
    margin: 40px 0 20px;
    color: var(--black);
}

.single-entry-content p {
    margin-bottom: 30px;
    line-height: 2;
}

.single-entry-content img {
    margin: 40px 0;
    border: 1px solid #eee;
}

.post-navigation {
    max-width: 800px;
    margin: 100px auto 0;
    border-top: 1px solid #eee;
    padding-top: 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--black);
    max-width: 45%;
}

.nav-label {
    font-size: 11px;
    font-weight: 900;
    color: #aaa;
    display: block;
    margin-bottom: 5px;
    letter-spacing: 0.1em;
}

.nav-title {
    font-size: 14px;
    font-weight: 700;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: 0.3s;
}

.nav-link:hover .nav-title {
    color: var(--gold-solid);
}

.back-to-list {
    text-align: center;
    margin-top: 80px;
}

.btn-back {
    display: inline-block;
    padding: 15px 40px;
    border: 1px solid var(--black);
    color: var(--black);
    text-decoration: none;
    font-size: 13px;
    font-weight: 900;
    transition: 0.3s;
}

.btn-back:hover {
    background: var(--black);
    color: var(--gold);
}

/* Archive Specific Styles */
.archive-post-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 30px;
    margin-top: 60px;
}

@media (max-width: 768px) {
    .archive-post-list {
        grid-template-columns: 1fr;
    }
}

.post-card {
    background: var(--white);
    border: 1px solid #eee;
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}

.post-card:hover {
    border-color: var(--gold-solid);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.post-card .post-img {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #eee;
}

.post-card .post-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s;
}

.post-card:hover .post-img img {
    transform: scale(1.05);
}

.post-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.post-meta {
    font-size: 12px;
    color: #888;
    margin-bottom: 15px;
    display: flex;
    gap: 15px;
    font-weight: 700;
}

.post-category {
    color: var(--gold-solid);
}

.post-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 15px;
    font-family: 'Noto Serif JP', serif;
}

.post-excerpt {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 20px;
}

.post-more {
    margin-top: auto;
    font-size: 13px;
    font-weight: 900;
    color: var(--gold-solid);
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 5px;
}

.pagination {
    margin-top: 80px;
    display: flex;
    justify-content: center;
    gap: 10px;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border: 1px solid #ddd;
    text-decoration: none;
    color: var(--black);
    font-weight: 700;
    font-size: 14px;
    transition: 0.3s;
}

.pagination a:hover,
.pagination .current {
    background: var(--black);
    color: var(--gold);
    border-color: var(--black);
}