@media (max-width: 980px) {
    .main-nav {
        position: absolute;
        left: 20px;
        right: 20px;
        top: 68px;
        padding: 12px;
        display: none;
        grid-template-columns: repeat(3, 1fr);
        border: 1px solid var(--line);
        border-radius: 18px;
        background: #0c1020;
        box-shadow: var(--shadow);
    }
    .main-nav.is-open {
        display: grid;
    }
    .nav-toggle {
        display: block;
    }
    .hero, .category-hero {
        grid-template-columns: 1fr;
    }
    .hero {
        padding-top: 42px;
    }
    .hero-visual {
        min-height: 420px;
    }
    .spotlight-grid .video-card, .spotlight-grid .video-card:first-child {
        grid-column: span 6;
        grid-row: auto;
    }
    .category-grid, .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hot-layout, .ranking-layout, .split-stage, .anime-feature, .tag-layout, .about-layout, .channel-bottom {
        grid-template-columns: 1fr;
    }
    .classic-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .premiere-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    .mood-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .container {
        width: min(100% - 28px, 1200px);
    }
    .header-inner {
        min-height: 66px;
    }
    .brand img {
        width: 145px;
    }
    .main-nav {
        left: 14px;
        right: 14px;
        grid-template-columns: repeat(2, 1fr);
        max-height: calc(100vh - 84px);
        overflow-y: auto;
    }
    .main-nav a {
        min-height: 54px;
        font-size: .82rem;
    }
    .hero {
        min-height: auto;
        gap: 28px;
    }
    .hero-copy h1 {
        font-size: 3.25rem;
    }
    .hero-visual {
        min-height: 310px;
        border-radius: 22px 22px 58px 22px;
    }
    .section {
        margin-top: 72px;
    }
    .spotlight-grid {
        display: block;
    }
    .spotlight-grid .video-card {
        margin-bottom: 16px;
    }
    .category-grid, .video-grid, .featured-row, .classic-grid, .mosaic-grid, .gallery-grid, .detail-columns, .related-grid {
        grid-template-columns: 1fr;
    }
    .category-tile {
        min-height: 0;
    }
    .hot-item {
        grid-template-columns: 40px 100px 1fr;
        gap: 10px;
    }
    .hot-item img {
        width: 100px;
    }
    .poster-strip {
        gap: 8px;
    }
    .poster-strip a {
        min-height: 220px;
    }
    .poster-strip a:nth-child(2) {
        transform: translateY(14px);
    }
    .mosaic-1 {
        grid-row: auto;
        min-height: 320px;
    }
    .editor-note {
        grid-template-columns: 1fr;
    }
    .mood-grid, .premiere-timeline {
        grid-template-columns: 1fr;
    }
    .subscribe-layout {
        grid-template-columns: 1fr;
    }
    .brand-code {
        width: 170px;
        height: 170px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .category-hero > a {
        min-height: 300px;
    }
    .watch-note {
        grid-template-columns: 1fr;
    }
    .player-controls {
        gap: 7px;
        font-size: .75rem;
    }
    .episode-nav {
        grid-template-columns: 1fr;
    }
    .episode-nav .next {
        text-align: left;
    }
    .back-channel {
        text-align: center;
    }
    .end-card {
        padding: 34px 18px;
    }
}