/* ==========================================================================
   Visual Design Accordion Section (3:4 Video Showcase)
   ========================================================================== */

@font-face {
    font-family: 'AlibabaPuHuiTi-SemiBold';
    src: url('assets/fonts/Alibaba-PuHuiTi-SemiBold.woff2') format('woff2'),
         url('assets/fonts/Alibaba-PuHuiTi-SemiBold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'AlibabaPuHuiTi-Heavy';
    src: url('assets/fonts/Alibaba-PuHuiTi-Heavy.woff2') format('woff2'),
         url('assets/fonts/Alibaba-PuHuiTi-Heavy.ttf') format('truetype');
    font-weight: 900;
    font-style: normal;
    font-display: swap;
}

.visual-accordion-container {
    display: flex;
    gap: 16px;
    width: 100%;
    height: 620px;
    margin: 2rem 0 4.5rem 0;
    box-sizing: border-box;
}

.visual-accordion-item {
    flex: 1;
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: #080808;
    cursor: pointer;
    box-sizing: border-box;
    transition: flex 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.visual-accordion-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Hover expansion effect on desktop */
@media (min-width: 1025px) {
    .visual-accordion-item:hover {
        flex: 3.2;
        border-color: rgba(255, 255, 255, 0.4);
        box-shadow: 0 20px 48px rgba(0, 0, 0, 0.85), 0 0 24px rgba(255, 255, 255, 0.06);
    }
    
    .visual-accordion-item:hover video {
        transform: scale(1.02);
    }
}

/* Card details overlay */
.accordion-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.45) 45%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    z-index: 2;
    pointer-events: none;
    transition: background 0.5s ease;
}

.visual-accordion-item:hover .accordion-item-overlay {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.5) 50%, rgba(0, 0, 0, 0.1) 100%);
}

.accordion-item-overlay .scene-num {
    font-family: 'AlibabaPuHuiTi-SemiBold', 'AlibabaPuHuiTi', 'Alibaba PuHuiTi', var(--font-ui), sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
    transform: translateY(0);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), color 0.5s;
}

.accordion-item-overlay h3 {
    font-family: 'AlibabaPuHuiTi-SemiBold', 'AlibabaPuHuiTi', 'Alibaba PuHuiTi', var(--font-ui), sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 6px 0;
    opacity: 0.7;
    transform: translateY(12px);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.6s;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}

@media (min-width: 1025px) {
    .visual-accordion-item:hover .accordion-item-overlay h3 {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fullscreen Play Button */
.accordion-fs-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(18, 18, 18, 0.5);
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.4s, transform 0.4s, background 0.3s, border-color 0.3s, color 0.3s;
    z-index: 5;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.accordion-fs-btn svg {
    width: 18px;
    height: 18px;
}

@media (min-width: 1025px) {
    .visual-accordion-item:hover .accordion-fs-btn {
        opacity: 1;
        transform: scale(1);
    }
}

.accordion-fs-btn:hover {
    background: #ffffff;
    border-color: #ffffff;
    color: #121212;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

/* ==========================================================================
   Mobile Responsive Adjustments (Snap Horizontal Scroll)
   ========================================================================== */

@media (max-width: 1024px) {
    .visual-accordion-container {
        height: auto;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        padding: 10px 4vw 24px 4vw;
        margin-bottom: 2.5rem;
        gap: 16px;
        scrollbar-width: none; /* Hide scrollbar for Firefox */
        width: 100vw;
        margin-left: calc(-4vw); /* Span edge to edge visually */
    }
    
    .visual-accordion-container::-webkit-scrollbar {
        display: none; /* Hide scrollbar for Chrome/Safari */
    }
    
    .visual-accordion-item {
        flex: 0 0 74vw; /* Display active card and partial adjacent ones */
        height: auto;
        aspect-ratio: 3/4;
        scroll-snap-align: center;
        border-radius: 14px;
        border-color: rgba(255, 255, 255, 0.12);
    }
    
    .visual-accordion-item:hover {
        flex: 0 0 74vw;
        transform: none;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    }
    
    .visual-accordion-item:hover video {
        transform: none;
    }
    
    .accordion-item-overlay {
        padding: 16px;
    }
    
    .accordion-item-overlay h3 {
        font-size: 1rem;
        opacity: 1;
        transform: none;
    }
    
    .accordion-fs-btn {
        opacity: 1;
        transform: scale(1);
        top: 16px;
        right: 16px;
        width: 36px;
        height: 36px;
    }
    
    .accordion-fs-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* ==========================================================================
   Yuanji Landing Cover Video Showcase (4:3 Dual Column Feature)
   ========================================================================== */

.landing-showcase-container {
    width: 100%;
    margin: 2rem 0 3.5rem 0;
}

.landing-showcase-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: center;
}

.landing-video-col {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: visible;
}

.landing-video-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: 16px;
    overflow: hidden;
    background: #050505;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.75);
    transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.landing-video-wrap:hover {
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.85), 0 0 20px rgba(255, 255, 255, 0.08);
}

.landing-video-wrap video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background: #000;
}

.landing-video-poster {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    z-index: 4;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    display: block;
}

.landing-video-wrap.is-playing .landing-video-poster {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.landing-video-poster img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-video-wrap:hover .landing-video-poster img {
    transform: scale(1.03);
}

.landing-video-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.45) 100%);
    pointer-events: none;
}

.landing-video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 5;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-video-wrap:hover .landing-video-play {
    transform: translate(-50%, -50%) scale(1.08);
}

.landing-video-play-icon {
    width: 60px;
    height: 60px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(20, 20, 24, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.landing-video-play-icon::after {
    content: "";
    position: absolute;
    left: 54%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-style: solid;
    border-width: 9px 0 9px 15px;
    border-color: transparent transparent transparent #ffffff;
    transition: border-color 0.3s;
}

.landing-video-play-text {
    font-size: 0.82rem;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
    font-family: 'AlibabaPuHuiTi-SemiBold', 'AlibabaPuHuiTi', 'Alibaba PuHuiTi', var(--font-ui), sans-serif;
    font-weight: 700;
}

.landing-ratio-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    background: rgba(10, 10, 12, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 500;
    color: #ffffff;
    letter-spacing: 0.08em;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 5;
    pointer-events: none;
}

.landing-info-col {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: 100%;
    padding: 2rem 1.5rem;
    background: transparent;
    border: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    box-sizing: border-box;
}

.landing-card-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 0;
    flex-shrink: 0;
    opacity: 0;
    filter: blur(10px);
    transform: translateY(24px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-showcase-container.is-visible .landing-card-header,
.landing-showcase-container.is-flown-in .landing-card-header {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
    transition-delay: 0.05s;
}

.landing-badge-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 14px;
}

.landing-badge {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: #4ea57f;
    text-transform: uppercase;
    font-weight: 600;
}

.landing-meta {
    font-family: 'AlibabaPuHuiTi-SemiBold', 'AlibabaPuHuiTi', 'Alibaba PuHuiTi', var(--font-ui), sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.55);
}

.landing-title-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.landing-kicker {
    display: block;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.65);
    letter-spacing: 0.14em;
    margin-bottom: 10px;
}

.landing-title {
    font-family: 'AlibabaPuHuiTi-Heavy', sans-serif;
    font-size: clamp(1.5rem, 2.2vw, 2.1rem);
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.05em;
    margin: 0;
    line-height: 1.4;
    text-align: center;
}

/* ==========================================================================
   3 Staggered Floating Cards (Compact & Layered on Video Right Side)
   ========================================================================== */

.landing-floating-card {
    position: absolute;
    width: clamp(96px, 9vw, 128px);
    aspect-ratio: 16 / 10;
    border-radius: 8px;
    overflow: hidden;
    background: #0c0d12;
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.75), 0 0 12px rgba(255, 255, 255, 0.05);
    box-sizing: border-box;
    cursor: pointer;
    z-index: 6;
    opacity: 0;
    pointer-events: none;
    will-change: transform, opacity;
    transition: transform 0.85s cubic-bezier(0.19, 1, 0.22, 1),
                opacity 0.7s ease-out,
                border-color 0.35s ease,
                box-shadow 0.35s ease;
}

.landing-floating-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-floating-card .floating-tag {
    position: absolute;
    bottom: 5px;
    left: 5px;
    font-family: var(--font-ui), 'Inter', sans-serif;
    font-size: 0.6rem;
    font-weight: 700;
    color: #ffffff;
    background: rgba(0, 0, 0, 0.75);
    padding: 2px 5px;
    border-radius: 3px;
    letter-spacing: 0.06em;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    pointer-events: none;
    z-index: 2;
    text-transform: uppercase;
}

/* 3 Non-uniform, organic staggered positions along video's right side (shifted outward) */
.landing-floating-card.card-scene-1 {
    top: 9%;
    right: -64px;
    transform: perspective(1000px) translate3d(70px, -15px, 60px) rotate(8deg) scale(0.65);
}

.landing-floating-card.card-scene-2 {
    top: 42%;
    right: -46px;
    width: clamp(104px, 9.8vw, 136px);
    transform: perspective(1000px) translate3d(80px, 0, 70px) rotate(-7deg) scale(0.65);
}

.landing-floating-card.card-scene-3 {
    bottom: 9%;
    right: -72px;
    transform: perspective(1000px) translate3d(70px, 20px, 60px) rotate(6deg) scale(0.65);
}

/* Flying into place sequentially when scrolled into view */
.landing-showcase-container.is-flown-in .landing-floating-card.card-scene-1 {
    opacity: 1;
    pointer-events: auto;
    transform: perspective(1000px) translate3d(0, 0, 0) rotate(3deg) scale(1);
    transition-delay: 0.10s;
}

.landing-showcase-container.is-flown-in .landing-floating-card.card-scene-2 {
    opacity: 1;
    pointer-events: auto;
    transform: perspective(1000px) translate3d(0, 0, 0) rotate(-2.5deg) scale(1);
    transition-delay: 0.28s;
}

.landing-showcase-container.is-flown-in .landing-floating-card.card-scene-3 {
    opacity: 1;
    pointer-events: auto;
    transform: perspective(1000px) translate3d(0, 0, 0) rotate(2deg) scale(1);
    transition-delay: 0.46s;
}

/* Interactive Hover state */
.landing-floating-card:hover {
    transform: perspective(1000px) translate3d(0, -4px, 16px) rotate(0deg) scale(1.15) !important;
    z-index: 20 !important;
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.85), 0 0 16px rgba(255, 255, 255, 0.16);
    transition-delay: 0s !important;
    transition-duration: 0.35s;
}

.landing-floating-card:hover img {
    transform: scale(1.08);
}

.landing-scenes-header {
    margin: 3.5rem 0 1.2rem 0;
    display: flex;
    align-items: baseline;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    padding-bottom: 10px;
}

.landing-scenes-header h4 {
    font-family: 'AlibabaPuHuiTi-Bold', sans-serif;
    font-size: 1.15rem;
    color: #ffffff;
    margin: 0;
    letter-spacing: 0.05em;
}

.landing-scenes-header p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.45);
    margin: 0;
    letter-spacing: 0.03em;
}

@media (max-width: 960px) {
    .landing-showcase-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .landing-video-col {
        overflow: visible;
        margin-bottom: 6px;
    }

    .landing-floating-card {
        width: clamp(72px, 19vw, 98px);
        border-radius: 6px;
    }

    .landing-floating-card.card-scene-1 {
        top: 6%;
        right: -18px;
    }

    .landing-floating-card.card-scene-2 {
        top: 38%;
        right: -8px;
        width: clamp(80px, 21vw, 106px);
    }

    .landing-floating-card.card-scene-3 {
        bottom: 6%;
        right: -22px;
    }

    .landing-info-col {
        height: auto;
        padding: 12px 8px;
    }

    .landing-title {
        font-size: 1.35rem;
    }

    .landing-scenes-header {
        flex-direction: column;
        gap: 4px;
        margin-top: 2.5rem;
    }
}