/* Branding Design Page */
/* Fixed canvas 1512×982, scaled by JS to fit any viewport */

body {
    margin: 0;
    padding: 0;
    background: #fff;
    overflow: hidden;
}

/* Hide all scrollbars */
*::-webkit-scrollbar {
    display: none;
}

* {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    z-index: 9999;
    background: white;
}

/* ── Viewport wrapper: fills screen below header ── */
.branding-viewport {
    width: 100vw;
    height: calc(100vh - 60px);
    margin-top: 60px;
    position: relative;
    overflow: hidden;
    background: #fff;
}

/* ── Inner canvas: fixed Figma size, JS scales + positions ── */
.branding-canvas {
    width: 1512px;
    height: 982px;
    position: absolute;
    transform-origin: 0 0;
}

/* ── Background layers (all absolute inside canvas) ── */
.branding-canvas img,
.branding-canvas h1,
.branding-canvas .branding-card {
    position: absolute;
}

/* 舞狮  655.47×846.699  rotate(-9.296deg)  at (-106, 152)  opacity 0.32 */
.bg-liondance {
    left: -106px;
    top: 152px;
    width: 655px;
    height: auto;
    transform: rotate(-9.296deg);
    mix-blend-mode: screen;
    opacity: 0.32;
    z-index: 0;
    pointer-events: none;
}

/* 麒麟龙旗 SVG  802.66×688.36  at (810, -31)  opacity 0.32 */
.bg-redvector {
    left: 810px;
    top: -31px;
    width: 803px;
    height: auto;
    opacity: 0.32;
    z-index: 1;
    pointer-events: none;
}

/* 绣球  284×304  at (394, 39)  opacity 0.50 */
.bg-lion {
    left: 394px;
    top: 39px;
    width: 284px;
    height: auto;
    opacity: 0.50;
    z-index: 2;
    pointer-events: none;
}

/* 灯笼  294×276  at (627, 175)  opacity 0.50 */
.bg-calligraphy {
    left: 627px;
    top: 175px;
    width: 294px;
    height: auto;
    opacity: 0.50;
    z-index: 2;
    pointer-events: none;
}

/* 花灯  398×431  at (921, 623)  opacity 0.50 */
.bg-pattern {
    left: 921px;
    top: 623px;
    width: 398px;
    height: auto;
    opacity: 0.50;
    z-index: 2;
    pointer-events: none;
}

/* ── Title  at (51, 39) ── */
.branding-title {
    left: 51px;
    top: 39px;
    font-family: Arial, sans-serif;
    font-size: 50px;
    font-weight: 700;
    color: #000;
    z-index: 10;
    margin: 0;
    line-height: 1.3;
    white-space: nowrap;
}

/* ── Cards  346.299×526  cornerRadius 32.758 ── */
.branding-card {
    top: 220px;
    width: 346px;
    height: 526px;
    z-index: 10;
    cursor: pointer;
    border-radius: 33px;
    padding: 0;
    margin: 0;
    line-height: 0;
    transform-style: preserve-3d;
    transition: transform 0.9s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.9s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform;
}

.branding-card:hover {
    transform: scale(1.12) rotateY(180deg);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.3);
}

.card-front,
.card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 33px;
    overflow: hidden;
}

.card-back {
    transform: rotateY(180deg);
}

.card-front img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-back img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: fill;
}

.card-1 {
    left: 303px;
}

.card-1 .card-front {
    background: #591817;
}

.card-1 .card-back {
    background: transparent;
}

.card-2 {
    left: 861px;
}

.card-2 .card-front {
    background: #E1263F;
}

.card-2 .card-back {
    background: transparent;
}

/* ── Back link (fixed, outside canvas to avoid scaling) ── */
.branding-back {
    position: fixed;
    left: 30px;
    bottom: 30px;
    z-index: 9997;
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #555;
    text-decoration: none;
    letter-spacing: 0.3px;
    line-height: 1;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 24px;
    transition: all 0.3s ease;
}

.branding-back:hover {
    color: #1a1a1a;
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.2);
}

/* ── Detail overlay ── */
.detail-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 10000;
    background: rgba(0, 0, 0, 0);
    visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.4s ease, visibility 0s 0.4s;
}

.detail-overlay.active {
    background: rgba(0, 0, 0, 0.6);
    visibility: visible;
    transition: background 0.4s ease, visibility 0s 0s;
}

.detail-scroll {
    width: 60%;
    max-width: 900px;
    max-height: 85vh;
    overflow-y: auto;
    border-radius: 20px;
    opacity: 0;
    transform: scale(0.9) translateY(30px);
    transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1),
                transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

.detail-overlay.active .detail-scroll {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.detail-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 20px;
}

.detail-close {
    position: fixed;
    top: 20px;
    right: 28px;
    z-index: 10001;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s ease 0.2s, background 0.3s ease;
}

.detail-overlay.active .detail-close {
    opacity: 1;
}

.detail-close:hover {
    background: rgba(223, 16, 27, 0.7);
}

/* ── Mobile responsive ── */
@media only screen and (max-width: 600px) {
    .cursor-big-circle,
    .cursor-small-circle {
        display: none !important;
    }
    * { cursor: auto !important; }

    .detail-scroll {
        width: 90%;
        max-height: 80vh;
        border-radius: 12px;
    }

    .detail-img {
        border-radius: 12px;
    }

    .detail-close {
        top: 12px;
        right: 12px;
        width: 36px;
        height: 36px;
        font-size: 20px;
    }

    .branding-back {
        left: 16px;
        bottom: 20px;
        padding: 14px 24px;
        font-size: 16px;
        font-weight: 700;
    }

    /* Touch-friendly cards: tap to flip instead of hover */
    .branding-card {
        cursor: pointer;
    }

    .branding-card:hover {
        transform: none;
        box-shadow: none;
    }

    .branding-card.flipped {
        transform: scale(1.05) rotateY(180deg);
        box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
    }
}