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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #FFFFFF;
    color: #17191b;
    line-height: 1.7;
    padding: 40px 20px;
    min-height: 100vh;
}

.archive-container {
    max-width: 1180px;
    margin: 0 auto;
    background: #FFFFFF;
    border: 1px solid #17191b;
    box-shadow: 0 20px 60px rgba(23, 25, 27, 0.09);
    overflow: hidden;
}

.archive-header {
    display: flex;
    align-items: center;
    padding: 38px 60px;
    border-bottom: 1px solid #17191b;
    gap: 50px;
    background: #FFFFFF;
}

.logo-container {
    flex-shrink: 0;
}

.logo {
    height: 44px;
    width: 413px;
    object-fit: contain;
    display: block;
}

.archive-title h1 {
    font-size: 3.35rem;
    font-weight: 700;
    letter-spacing: -3px;
    line-height: 1;
    color: #17191b;
}

.archive-title .void-text {
    font-size: 0.97rem;
    letter-spacing: 8px;
    font-weight: 400;
    opacity: 0.6;
    display: block;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.12rem;
    opacity: 0.78;
    margin-top: 12px;
}

.archive-tabs {
    display: flex;
    background: #fafafa;
    border-bottom: 1px solid #17191b;
    overflow-x: auto;
    scrollbar-width: none;
}

.archive-tabs::-webkit-scrollbar {
    display: none;
}

.tab {
    padding: 21px 38px;
    font-weight: 500;
    text-decoration: none;
    color: #17191b;
    border-right: 1px solid #e8e8e8;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    font-size: 1.03rem;
    white-space: nowrap;
}

.tab:hover {
    background: #313c48;
    color: #FFFFFF;
}

.tab.active {
    background: #17191b;
    color: #FFFFFF;
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: #313c48;
}

.archive-layers {
    padding: 70px 60px;
    min-height: 700px;
    background: #FFFFFF;
}

.layer {
    display: none;
}

.layer.active {
    display: block;
    animation: fadeInLayer 0.65s ease forwards;
}

@keyframes fadeInLayer {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.layer-content {
    max-width: 880px;
    margin: 0 auto;
}

.layer-content h2 {
    font-size: 2.25rem;
    margin-bottom: 40px;
    letter-spacing: -1.2px;
    color: #17191b;
    text-align: center;
}

.layer-content h3 {
    font-size: 1.48rem;
    margin: 45px 0 20px;
    color: #17191b;
    text-align: left;
}

.layer-image {
    max-width: 100%;
    height: auto;
    border: 1px solid #17191b;
    box-shadow: 0 15px 40px rgba(23, 25, 27, 0.13);
    margin-bottom: 42px;
    display: block;
}

.description {
    font-size: 1.1rem;
    max-width: 760px;
    margin: 0 auto 26px;
    opacity: 0.87;
    text-align: left;
}

.features-list {
    text-align: left;
    max-width: 760px;
    margin: 0 auto 35px;
    list-style: none;
}

.features-list li {
    padding: 11px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 1.08rem;
}

.features-list strong {
    color: #17191b;
    font-weight: 600;
}

.mirrors-box {
    background: #f8f8f8;
    border: 1px solid #17191b;
    padding: 48px 55px;
    text-align: left;
    max-width: 760px;
    margin: 0 auto;
}

.mirrors-box h3 {
    margin-bottom: 18px;
    font-size: 1.55rem;
}

.intro-text {
    margin-bottom: 28px;
    opacity: 0.82;
    font-size: 1.06rem;
}

.mirror-list {
    list-style: none;
    margin-bottom: 32px;
}

.mirror-list li {
    margin-bottom: 17px;
}

.mirror-link {
    color: #17191b;
    text-decoration: none;
    font-family: ui-monospace, monospace;
    font-size: 1.08rem;
    line-height: 1.5;
    transition: color 0.2s ease;
}

.mirror-link:hover {
    color: #313c48;
}

.note {
    font-size: 0.94rem;
    opacity: 0.72;
    border-top: 1px dashed #b0b0b0;
    padding-top: 20px;
}

.archive-footer {
    border-top: 1px solid #17191b;
    padding: 32px 60px;
    text-align: center;
    font-size: 0.92rem;
    opacity: 0.73;
    background: #fafafa;
}

.warning {
    color: #313c48;
    font-weight: 500;
    margin-top: 12px;
}

.warning-note {
    color: #313c48;
    font-style: italic;
    margin-top: 35px;
    padding-top: 22px;
    border-top: 1px solid #e5e5e5;
    font-size: 1.02rem;
}

html {
    scroll-behavior: smooth;
}

@media (max-width: 992px) {
    .archive-header {
        flex-direction: column;
        text-align: center;
        gap: 25px;
        padding: 35px 40px;
    }
    
    .archive-title h1 {
        font-size: 2.8rem;
    }
    
    .archive-tabs {
        flex-wrap: wrap;
    }
    
    .tab {
        flex: 1 1 auto;
        text-align: center;
    }
    
    .archive-layers {
        padding: 50px 40px;
    }
}

.steps-list {
    text-align: left;
    max-width: 760px;
    margin: 0 auto 30px;
    padding-left: 20px;
    font-size: 1.08rem;
}

.steps-list li {
    margin-bottom: 14px;
    padding-left: 8px;
}

.archive-layers section {
    scroll-margin-top: 80px;
}

.layer-content h2 {
    font-size: 2.2rem;
    margin-bottom: 38px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.layer-content h3 {
    font-size: 1.5rem;
    margin: 42px 0 18px;
    color: #17191b;
}

.mirror-list li {
    margin-bottom: 18px;
}

.mirror-link {
    color: #17191b;
    text-decoration: none;
    font-family: ui-monospace, monospace;
    font-size: 1.07rem;
    transition: color 0.25s ease;
}

.mirror-link:hover {
    color: #313c48;
}

.intro-text {
    margin-bottom: 26px;
    line-height: 1.6;
    font-size: 1.07rem;
}

.note {
    font-size: 0.95rem;
    opacity: 0.73;
    line-height: 1.65;
}

.warning-note {
    margin-top: 35px;
    padding: 20px;
    background: #f8f8f8;
    border-left: 4px solid #313c48;
    font-style: italic;
    color: #313c48;
}

.features-list {
    text-align: left;
    max-width: 760px;
    margin: 25px auto 35px;
    padding: 0 10px;
    list-style: none;
}

.features-list li {
    padding: 10px 0 10px 25px;
    position: relative;
    border-bottom: 1px solid #f0f0f0;
}

.features-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #313c48;
    font-size: 1.4rem;
    line-height: 1;
}

ol.steps-list {
    counter-reset: step-counter;
}

ol.steps-list li {
    counter-increment: step-counter;
    position: relative;
    padding-left: 32px;
    margin-bottom: 16px;
}

ol.steps-list li:before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    width: 24px;
    height: 24px;
    background: #17191b;
    color: #FFFFFF;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    font-size: 0.95rem;
    font-weight: 600;
}

@media (max-width: 768px) {
    .layer-content h2 {
        font-size: 1.95rem;
    }
    
    .archive-header {
        padding: 30px 30px;
        gap: 25px;
    }
    
    .archive-layers {
        padding: 50px 30px;
    }
    
    .mirrors-box {
        padding: 35px 30px;
    }
}