:root {
    --ffgz-intro-exit: 440ms;
}

.ffgz-brand-intro {
    position: fixed;
    z-index: 9999;
    inset: 0;
    display: none;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 48%, rgba(45, 137, 170, 0.18), transparent 30%),
        linear-gradient(145deg, #02070b, #071923 52%, #020507);
    opacity: 1;
    visibility: visible;
    isolation: isolate;
    transition:
        opacity var(--ffgz-intro-exit) cubic-bezier(0.22, 1, 0.36, 1),
        visibility 0s linear var(--ffgz-intro-exit);
}

.ffgz-intro-pending,
.ffgz-intro-pending body {
    overflow: hidden;
}

.ffgz-intro-pending .ffgz-brand-intro {
    display: block;
}

.ffgz-brand-intro__frame {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    background: #020709;
    transform: scale(1);
    filter: brightness(1);
    transition:
        transform var(--ffgz-intro-exit) cubic-bezier(0.22, 1, 0.36, 1),
        filter var(--ffgz-intro-exit) ease;
}

.ffgz-brand-intro__skip {
    position: absolute;
    z-index: 2;
    top: max(20px, env(safe-area-inset-top));
    right: max(20px, env(safe-area-inset-right));
    min-width: 76px;
    min-height: 40px;
    padding: 0 18px;
    color: rgba(228, 249, 252, 0.82);
    font: 500 13px/1 "Inter", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    letter-spacing: 0.08em;
    border: 1px solid rgba(126, 223, 255, 0.24);
    border-radius: 999px;
    background: rgba(3, 17, 26, 0.58);
    box-shadow: 0 10px 36px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    opacity: 0;
    transform: translateY(-6px);
    animation: ffgz-intro-skip-in 500ms 500ms ease forwards;
    transition:
        color 180ms ease,
        border-color 180ms ease,
        background 180ms ease,
        transform 180ms ease;
}

.ffgz-brand-intro__skip:hover {
    color: #ffffff;
    border-color: rgba(126, 223, 255, 0.62);
    background: rgba(8, 32, 46, 0.78);
    transform: translateY(-1px);
}

.ffgz-brand-intro__skip:focus-visible {
    outline: 2px solid #7edfff;
    outline-offset: 3px;
}

.ffgz-brand-intro__progress {
    position: absolute;
    z-index: 2;
    right: 0;
    bottom: 0;
    left: 0;
    height: 2px;
    overflow: hidden;
    background: rgba(126, 223, 255, 0.08);
}

.ffgz-brand-intro__progress::after {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(126, 223, 255, 0.28), #d8f8ff);
    box-shadow: 0 0 14px rgba(126, 223, 255, 0.58);
    transform: scaleX(0);
    transform-origin: left;
    animation: ffgz-intro-progress 4.4s linear forwards;
}

.ffgz-intro-leaving .ffgz-brand-intro {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.ffgz-intro-leaving .ffgz-brand-intro__frame {
    transform: scale(1.012);
    filter: brightness(1.08);
}

.ffgz-intro-pending #navbar,
.ffgz-intro-pending #hero {
    opacity: 0.94;
    transform: scale(0.998);
    transition:
        opacity var(--ffgz-intro-exit) ease,
        transform var(--ffgz-intro-exit) cubic-bezier(0.22, 1, 0.36, 1);
}

.ffgz-intro-leaving #navbar,
.ffgz-intro-leaving #hero {
    opacity: 1;
    transform: none;
}

@keyframes ffgz-intro-progress {
    to {
        transform: scaleX(1);
    }
}

@keyframes ffgz-intro-skip-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 640px) {
    .ffgz-brand-intro__skip {
        top: max(14px, env(safe-area-inset-top));
        right: max(14px, env(safe-area-inset-right));
        min-width: 70px;
        min-height: 38px;
        padding: 0 15px;
        font-size: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ffgz-brand-intro,
    .ffgz-brand-intro__frame,
    .ffgz-intro-pending #navbar,
    .ffgz-intro-pending #hero {
        transition: none;
    }

    .ffgz-brand-intro__skip,
    .ffgz-brand-intro__progress::after {
        animation: none;
    }
}