Создаём стеклянный блок с анимированным фоном в Tilda

Инструкция

<!-- Адаптивный блок с эффектом жидкого стекла, движущимся фоном, фотографией и текстовой карточкой для Tilda. Источник: bulgkate.ru -->
<style>
:root {
    /* ФОНОВОЕ ИЗОБРАЖЕНИЕ — МЕНЯТЬ ЗДЕСЬ */
    --bk-pattern-image:
        url("https://png.pngtree.com/thumb_back/fw800/background/20251015/pngtree-delicate-branch-leaves-pattern-subtle-green-tones-botanical-repeat-design-on-image_19824888.webp?auto=format&fit=crop&w=1800&q=85");
}
</style>

<!-- Адаптивный блок с эффектом жидкого стекла для Tilda -->
<section class="bk-glass">
    <div class="bk-glass__ambient bk-glass__ambient--one"></div>
    <div class="bk-glass__ambient bk-glass__ambient--two"></div>

    <div class="bk-glass__container">

        <header class="bk-glass__panel bk-glass__title">
            <span class="bk-glass__effect"></span>
            <span class="bk-glass__tint"></span>
            <span class="bk-glass__shine"></span>

            <div class="bk-glass__content">
                Lorem ipsum dolor sit amet
            </div>
        </header>

        <div class="bk-glass__grid">

            <div class="bk-glass__panel bk-glass__photo">
                <span class="bk-glass__effect"></span>
                <span class="bk-glass__tint"></span>
                <span class="bk-glass__shine"></span>

                <div class="bk-glass__content">
                    <div class="bk-glass__photo-frame">
                        <img
                            src="https://images.unsplash.com/photo-1497250681960-ef046c08a56e?auto=format&fit=crop&w=1400&q=90"
                            alt="Тропические растения"
                            loading="lazy"
                        >
                    </div>
                </div>
            </div>

            <article class="bk-glass__panel bk-glass__description">
                <span class="bk-glass__effect"></span>
                <span class="bk-glass__tint"></span>
                <span class="bk-glass__shine"></span>

                <div class="bk-glass__content">
                    <p>
                        Lorem ipsum dolor sit amet, consectetur adipiscing elit.
                        Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
                    </p>

                    <p>
                        Ut enim ad minim veniam, quis nostrud exercitation ullamco
                        laboris nisi ut aliquip ex ea commodo consequat.
                    </p>

                    <p>
                        Duis aute irure dolor in reprehenderit in voluptate velit
                        esse cillum dolore eu fugiat nulla pariatur.
                    </p>
                </div>
            </article>

        </div>
    </div>
</section>

<svg class="bk-glass__filters" aria-hidden="true">
    <defs>
        <filter
            id="bk-glass-distortion"
            x="-20%"
            y="-20%"
            width="140%"
            height="140%"
            color-interpolation-filters="sRGB"
        >
            <feTurbulence
                type="fractalNoise"
                baseFrequency="0.012 0.018"
                numOctaves="2"
                seed="8"
                result="noise"
            />

            <feGaussianBlur
                in="noise"
                stdDeviation="1.8"
                result="softNoise"
            />

            <feDisplacementMap
                in="SourceGraphic"
                in2="softNoise"
                scale="22"
                xChannelSelector="R"
                yChannelSelector="G"
            />
        </filter>
    </defs>
</svg>

<style>
.bk-glass {
    --bk-glass-text: #17231d;
    --bk-glass-muted: rgba(23, 35, 29, 0.78);
    --bk-glass-gap: 24px;
    --bk-glass-radius: 32px;
    --bk-glass-motion:
        0.45s cubic-bezier(0.175, 0.885, 0.32, 1.25);

    position: relative;
    isolation: isolate;
    display: flex;
    align-items: center;

    width: 100%;
    min-height: 100vh;
    overflow: hidden;

    color: var(--bk-glass-text);

    background-color: #dcefdc;

    background-image:
        linear-gradient(
            125deg,
            rgba(255, 251, 224, 0.2),
            rgba(186, 224, 205, 0.16)
        ),
        var(--bk-pattern-image);

    background-repeat:
        no-repeat,
        repeat;

    background-position:
        center,
        0 0;

    background-size:
        cover,
        720px auto;

    font-family:
        "Inter",
        "TildaSans",
        Arial,
        sans-serif;

    animation:
        bk-glass-background
        70s
        linear
        infinite;
}

.bk-glass,
.bk-glass * {
    box-sizing: border-box;
}

.bk-glass::before {
    content: "";
    position: absolute;
    z-index: -2;
    inset: 0;

    pointer-events: none;

    background:
        radial-gradient(
            circle at 8% 18%,
            rgba(255, 221, 156, 0.68),
            transparent 31%
        ),
        radial-gradient(
            circle at 86% 20%,
            rgba(230, 139, 171, 0.4),
            transparent 28%
        ),
        radial-gradient(
            circle at 75% 88%,
            rgba(92, 159, 210, 0.48),
            transparent 34%
        );
}

.bk-glass::after {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 0;

    pointer-events: none;

    background:
        linear-gradient(
            115deg,
            rgba(255, 255, 255, 0.15),
            transparent 38%,
            rgba(255, 255, 255, 0.08)
        );
}

.bk-glass__ambient {
    position: absolute;
    z-index: -1;

    width: 420px;
    height: 420px;

    border-radius: 50%;
    pointer-events: none;

    filter: blur(90px);
    opacity: 0.35;

    animation:
        bk-glass-float
        15s
        ease-in-out
        infinite
        alternate;
}

.bk-glass__ambient--one {
    top: -160px;
    right: 3%;

    background: #ff93bd;
}

.bk-glass__ambient--two {
    bottom: -190px;
    left: 5%;

    background: #6fb5e6;
    animation-delay: -6s;
}

.bk-glass__container {
    position: relative;
    z-index: 1;

    width: min(1140px, calc(100% - 40px));

    margin: 0 auto;
    padding: 90px 0;
}

.bk-glass__panel {
    position: relative;
    isolation: isolate;
    overflow: hidden;

    border: 1px solid rgba(255, 255, 255, 0.64);
    border-radius: var(--bk-glass-radius);

    background: rgba(255, 255, 255, 0.08);

    box-shadow:
        0 18px 55px rgba(45, 75, 60, 0.15),
        0 6px 16px rgba(45, 75, 60, 0.08),
        inset 1px 1px 0 rgba(255, 255, 255, 0.88),
        inset -1px -1px 0 rgba(255, 255, 255, 0.26);

    transition:
        transform var(--bk-glass-motion),
        border-radius var(--bk-glass-motion),
        border-color var(--bk-glass-motion),
        box-shadow var(--bk-glass-motion);
}

.bk-glass__effect,
.bk-glass__tint,
.bk-glass__shine {
    position: absolute;
    inset: 0;

    border-radius: inherit;

    pointer-events: none;
}

.bk-glass__effect {
    z-index: 0;
    overflow: hidden;

    background: rgba(255, 255, 255, 0.03);

    -webkit-backdrop-filter:
        blur(8px)
        saturate(145%);

    backdrop-filter:
        blur(8px)
        saturate(145%);

    filter: url("#bk-glass-distortion");

    transition:
        background var(--bk-glass-motion),
        backdrop-filter var(--bk-glass-motion),
        -webkit-backdrop-filter var(--bk-glass-motion);
}

.bk-glass__tint {
    z-index: 1;

    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.38),
            rgba(255, 255, 255, 0.12) 44%,
            rgba(236, 251, 244, 0.2)
        );

    transition:
        background var(--bk-glass-motion),
        opacity var(--bk-glass-motion);
}

.bk-glass__shine {
    z-index: 2;

    opacity: 0.88;

    background:
        linear-gradient(
            118deg,
            rgba(255, 255, 255, 0.64) 0%,
            rgba(255, 255, 255, 0.16) 15%,
            transparent 34%,
            transparent 70%,
            rgba(255, 255, 255, 0.13) 100%
        );

    box-shadow:
        inset 2px 2px 2px rgba(255, 255, 255, 0.76),
        inset -2px -2px 2px rgba(255, 255, 255, 0.17);

    transition:
        opacity var(--bk-glass-motion),
        transform 0.7s cubic-bezier(0.2, 0.7, 0.25, 1);
}

.bk-glass__content {
    position: relative;
    z-index: 3;

    width: 100%;
}

.bk-glass__filters {
    position: absolute;

    width: 0;
    height: 0;

    overflow: hidden;
}

.bk-glass__title {
    margin-bottom: var(--bk-glass-gap);
    padding: 25px 32px;
}

.bk-glass__title .bk-glass__content {
    max-width: 920px;

    font-size: clamp(34px, 4.4vw, 60px);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.04em;

    text-wrap: balance;
}

.bk-glass__grid {
    display: grid;

    grid-template-columns:
        minmax(320px, 0.9fr)
        minmax(360px, 1.1fr);

    gap: var(--bk-glass-gap);

    align-items: start;
}

.bk-glass__photo {
    height: clamp(350px, 34vw, 410px);

    padding: 14px;
}

.bk-glass__photo .bk-glass__content {
    height: 100%;
}

.bk-glass__photo-frame {
    width: 100%;
    height: 100%;

    overflow: hidden;

    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 22px;

    box-shadow:
        0 12px 30px rgba(29, 53, 42, 0.14),
        inset 0 0 0 1px rgba(255, 255, 255, 0.18);

    transition:
        border-radius var(--bk-glass-motion),
        transform var(--bk-glass-motion);
}

.bk-glass__photo img {
    display: block;

    width: 100%;
    height: 100%;

    object-fit: cover;
    object-position: center;

    filter:
        saturate(0.9)
        contrast(1.04)
        brightness(0.96);

    transition:
        transform 0.7s cubic-bezier(0.2, 0.7, 0.25, 1),
        filter 0.7s ease;
}

.bk-glass__description {
    min-height: clamp(350px, 34vw, 410px);

    padding: clamp(30px, 4vw, 46px);
}

.bk-glass__description .bk-glass__content {
    color: var(--bk-glass-muted);

    font-size: clamp(17px, 1.4vw, 20px);
    font-weight: 450;
    line-height: 1.58;
    letter-spacing: -0.01em;
}

.bk-glass__description p {
    margin: 0;
}

.bk-glass__description p + p {
    margin-top: 1.15em;
}

@media (hover: hover) {
    .bk-glass__panel:hover {
        z-index: 4;

        transform:
            translateY(-5px)
            scale(1.012);

        border-color: rgba(255, 255, 255, 0.92);
        border-radius: 38px;

        box-shadow:
            0 30px 75px rgba(39, 73, 56, 0.21),
            0 10px 25px rgba(39, 73, 56, 0.1),
            inset 2px 2px 1px rgba(255, 255, 255, 0.96),
            inset -2px -2px 2px rgba(255, 255, 255, 0.32);
    }

    .bk-glass__panel:hover .bk-glass__effect {
        background: rgba(255, 255, 255, 0.07);

        -webkit-backdrop-filter:
            blur(20px)
            saturate(165%);

        backdrop-filter:
            blur(20px)
            saturate(165%);
    }

    .bk-glass__panel:hover .bk-glass__tint {
        background:
            linear-gradient(
                145deg,
                rgba(255, 255, 255, 0.5),
                rgba(255, 255, 255, 0.16) 46%,
                rgba(237, 253, 246, 0.28)
            );
    }

    .bk-glass__panel:hover .bk-glass__shine {
        opacity: 1;

        transform: translate3d(3px, 2px, 0);
    }

    .bk-glass__photo:hover .bk-glass__photo-frame {
        border-radius: 27px;

        transform: scale(0.985);
    }

    .bk-glass__photo:hover img {
        transform: scale(1.07);

        filter:
            saturate(1.05)
            contrast(1.02)
            brightness(1.02);
    }
}

@keyframes bk-glass-background {
    from {
        background-position:
            center,
            0 0;
    }

    to {
        background-position:
            center,
            0 -720px;
    }
}

@keyframes bk-glass-float {
    from {
        transform:
            translate3d(-25px, -15px, 0)
            scale(0.94);
    }

    to {
        transform:
            translate3d(35px, 25px, 0)
            scale(1.08);
    }
}

@media (max-width: 900px) {
    .bk-glass {
        min-height: auto;

        background-size:
            cover,
            620px auto;
    }

    .bk-glass__container {
        padding: 60px 0;
    }

    .bk-glass__grid {
        grid-template-columns: 1fr;
    }

    .bk-glass__photo {
        height: 420px;
    }

    .bk-glass__description {
        min-height: auto;
    }
}

@media (max-width: 600px) {
    .bk-glass {
        --bk-glass-gap: 16px;
        --bk-glass-radius: 24px;

        min-height: auto;

        background-size:
            cover,
            480px auto;
    }

    .bk-glass__container {
        width: calc(100% - 20px);

        padding: 20px 0;
    }

    .bk-glass__title {
        padding: 21px 20px;
    }

    .bk-glass__title .bk-glass__content {
        font-size: clamp(29px, 9vw, 42px);
        line-height: 1.08;
    }

    .bk-glass__photo {
        height: 310px;

        padding: 10px;
    }

    .bk-glass__photo-frame {
        border-radius: 17px;
    }

    .bk-glass__description {
        padding: 25px 21px;
    }

    .bk-glass__description .bk-glass__content {
        font-size: 16px;
        line-height: 1.55;
    }

    .bk-glass__ambient {
        width: 260px;
        height: 260px;

        filter: blur(65px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .bk-glass,
    .bk-glass__ambient {
        animation: none;
    }

    .bk-glass__panel,
    .bk-glass__effect,
    .bk-glass__tint,
    .bk-glass__shine,
    .bk-glass__photo-frame,
    .bk-glass__photo img {
        transition: none;
    }
}
</style>