:root {
    --bg: #FFFFFF;
    --text: #17191b;
    --accent: #17191b;
    --hover: #313c48;
    --light: #f8f9fa;
    --border: #e5e7eb;
    --gray: #555;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.65;
    font-size: 17px;
    font-weight: 400;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 40px;
}

.header {
    padding: 100px 0 80px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.logo img {
    max-width: 413px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.archive-title {
    font-size: 2.85rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    margin: 28px 0 10px;
    color: var(--accent);
}

.subtitle {
    font-size: 1.18rem;
    color: #666;
    max-width: 620px;
    margin: 0 auto;
}

.section {
    padding: 110px 0;
    border-bottom: 1px solid var(--border);
}

.section:last-child {
    border-bottom: none;
}

.section-title {
    font-size: 2.05rem;
    font-weight: 600;
    margin-bottom: 50px;
    color: var(--accent);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 68px;
    height: 3px;
    background: var(--accent);
}

.lead-text {
    font-size: 1.22rem;
    max-width: 820px;
    margin: 0 auto 32px;
    text-align: center;
    color: #1f1f1f;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 42px;
}

.feature-item h3 {
    font-size: 1.38rem;
    margin-bottom: 16px;
    color: var(--accent);
}

.feature-item p {
    color: var(--gray);
    font-size: 1.02rem;
}

.image-frame {
    background-color: var(--light);
    border: 1px solid var(--border);
    padding: 22px;
    box-shadow: 0 12px 35px rgba(23, 25, 27, 0.06);
    margin-bottom: 30px;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.image-frame:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(23, 25, 27, 0.1);
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid #e0e0e0;
}

.caption {
    font-size: 1.02rem;
    color: #555;
    text-align: center;
    max-width: 760px;
    margin: 0 auto;
    line-height: 1.55;
}

.product-categories {
    margin-top: 55px;
    padding: 42px 40px;
    background-color: #f9f9f9;
    border: 1px solid var(--border);
}

.product-categories h3 {
    margin-bottom: 24px;
    color: var(--accent);
    font-size: 1.35rem;
}

.product-categories ul {
    columns: 2;
    gap: 50px;
    list-style: none;
}

.product-categories li {
    margin-bottom: 11px;
    padding-left: 6px;
    position: relative;
}

.product-categories li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.guide {
    max-width: 840px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 32px;
    margin-bottom: 56px;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background-color: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    font-weight: 700;
}

.step-content h4 {
    font-size: 1.32rem;
    margin-bottom: 14px;
    color: var(--accent);
}

.step-content p {
    color: var(--gray);
    font-size: 1.03rem;
}

.rules-list p {
    margin-bottom: 26px;
    padding-left: 26px;
    position: relative;
    font-size: 1.05rem;
}

.rules-list p::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 1.8rem;
    line-height: 1;
}

.mirrors-section {
    background-color: #f9f9f9;
}

.mirrors-intro {
    font-size: 1.24rem;
    margin-bottom: 38px;
    color: #222;
    max-width: 720px;
}

.mirrors-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 50px;
}

.mirror-link {
    display: block;
    padding: 21px 30px;
    background-color: #fff;
    border: 1px solid var(--border);
    color: var(--accent);
    text-decoration: none;
    font-family: ui-monospace, monospace;
    font-size: 1.09rem;
    line-height: 1.5;
    transition: all 0.3s ease;
    word-break: break-all;
}

.mirror-link:hover {
    background-color: var(--hover);
    color: #fff;
    border-color: var(--hover);
}

.warning {
    font-size: 0.96rem;
    color: #666;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.stat-item {
    background-color: #fff;
    border: 1px solid var(--border);
    padding: 32px 24px;
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-value {
    display: block;
    font-size: 1.72rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.97rem;
    color: #666;
}

.note {
    margin-top: 48px;
    font-size: 0.97rem;
    color: #555;
    text-align: center;
    font-style: italic;
}

.footer {
    padding: 80px 0 60px;
    text-align: center;
    color: #777;
    font-size: 0.96rem;
    border-top: 1px solid var(--border);
}

.footer .small {
    margin-top: 18px;
    font-size: 0.87rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }
    .header {
        padding: 80px 0 60px;
    }
    .archive-title {
        font-size: 2.35rem;
    }
    .section {
        padding: 80px 0;
    }
    .section-title {
        font-size: 1.85rem;
    }
    .product-categories ul {
        columns: 1;
    }
    .step {
        gap: 24px;
    }
    .step-number {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
    }
}

.hero-section {
    padding-top: 60px;
    padding-bottom: 80px;
}

.lead-text {
    font-size: 1.23rem;
    max-width: 860px;
    margin: 0 auto 32px;
    text-align: center;
    color: #1f1f1f;
    line-height: 1.68;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 44px;
    margin-top: 20px;
}

.feature-item h3 {
    font-size: 1.42rem;
    margin-bottom: 16px;
    color: var(--accent);
    font-weight: 600;
}

.feature-item p {
    color: #444;
    font-size: 1.04rem;
    line-height: 1.65;
}

.image-frame {
    background-color: var(--light);
    border: 1px solid var(--border);
    padding: 26px;
    box-shadow: 0 14px 38px rgba(23, 25, 27, 0.07);
    margin-bottom: 32px;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.image-frame:hover {
    transform: translateY(-6px);
    box-shadow: 0 22px 55px rgba(23, 25, 27, 0.11);
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid #e0e0e0;
}

.caption {
    font-size: 1.03rem;
    color: #555;
    text-align: center;
    max-width: 780px;
    margin: 0 auto;
    line-height: 1.6;
}

.product-categories {
    margin-top: 58px;
    padding: 44px 42px;
    background-color: #f9f9f9;
    border: 1px solid var(--border);
}

.product-categories h3 {
    margin-bottom: 26px;
    color: var(--accent);
    font-size: 1.38rem;
}

.product-categories ul {
    columns: 2;
    gap: 48px;
    list-style: none;
}

.product-categories li {
    margin-bottom: 13px;
    padding-left: 8px;
    position: relative;
}

.product-categories li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 1.4rem;
}

.guide {
    max-width: 860px;
    margin: 40px auto 0;
}

.step {
    display: flex;
    gap: 34px;
    margin-bottom: 58px;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 58px;
    height: 58px;
    background-color: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content h4 {
    font-size: 1.35rem;
    margin-bottom: 15px;
    color: var(--accent);
    font-weight: 600;
}

.step-content p {
    color: #444;
    font-size: 1.04rem;
}

.rules-list p {
    margin-bottom: 28px;
    padding-left: 28px;
    position: relative;
    font-size: 1.06rem;
    line-height: 1.65;
}

.rules-list p::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 1.85rem;
    line-height: 1;
}

.mirrors-intro {
    font-size: 1.26rem;
    margin-bottom: 40px;
    color: #222;
    max-width: 740px;
}

.mirrors-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 52px;
}

.mirror-link {
    display: block;
    padding: 22px 32px;
    background-color: #fff;
    border: 1px solid var(--border);
    color: var(--accent);
    text-decoration: none;
    font-family: ui-monospace, monospace;
    font-size: 1.1rem;
    line-height: 1.52;
    transition: all 0.32s ease;
    word-break: break-all;
}

.mirror-link:hover {
    background-color: var(--hover);
    color: #fff;
    border-color: var(--hover);
}

.warning {
    font-size: 0.97rem;
    color: #666;
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.65;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
    gap: 30px;
    margin-top: 42px;
}

.stat-item {
    background-color: #fff;
    border: 1px solid var(--border);
    padding: 34px 26px;
    text-align: center;
    transition: transform 0.35s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-value {
    display: block;
    font-size: 1.78rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 9px;
}

.stat-label {
    font-size: 0.98rem;
    color: #666;
}

.note {
    margin-top: 50px;
    font-size: 0.98rem;
    color: #555;
    text-align: center;
    font-style: italic;
    line-height: 1.6;
}

.faq {
    max-width: 860px;
    margin: 40px auto 0;
}

.faq-item {
    margin-bottom: 42px;
}

.faq-item h4 {
    font-size: 1.28rem;
    margin-bottom: 14px;
    color: var(--accent);
    font-weight: 600;
}

.faq-item p {
    color: #444;
    font-size: 1.04rem;
    line-height: 1.65;
}

.footer {
    padding: 82px 0 62px;
    text-align: center;
    color: #777;
    font-size: 0.97rem;
    border-top: 1px solid var(--border);
}

.footer .small {
    margin-top: 20px;
    font-size: 0.88rem;
}

@media (max-width: 768px) {
    .hero-section {
        padding-top: 50px;
        padding-bottom: 60px;
    }
    .archive-title {
        font-size: 2.4rem;
    }
    .section {
        padding: 82px 0;
    }
    .product-categories ul {
        columns: 1;
    }
    .step {
        gap: 26px;
    }
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.35rem;
    }
    .mirrors-list {
        gap: 16px;
    }
    .mirror-link {
        padding: 20px 26px;
        font-size: 1.05rem;
    }
}