* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, sans-serif;
    background: #eef8fb;
    color: #07121f;
    overflow-x: hidden;
}

.hero {
    min-height: 100vh;
    position: relative;
    padding: 28px 9%;
    overflow: hidden;
    background:
        linear-gradient(90deg, rgba(238,248,251,.97) 0%, rgba(238,248,251,.80) 45%, rgba(238,248,251,.35) 100%),
        url("https://images.unsplash.com/photo-1600607687939-ce8a6c25118c?auto=format&fit=crop&w=1600&q=80");
    background-size: cover;
    background-position: center;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    position: relative;
    z-index: 20;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, #19b6c9, #00708e);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
}

.logo-text {
    line-height: 1.1;
}

.nav {
    display: flex;
    gap: 28px;
    font-size: 14px;
    font-weight: 800;
}

.nav a {
    color: #111827;
    text-decoration: none;
    position: relative;
}

.nav a.active::after,
.nav a:hover::after {
    content: "";
    width: 100%;
    height: 3px;
    background: #28d783;
    position: absolute;
    left: 0;
    bottom: -8px;
    border-radius: 10px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-btn {
    padding: 12px 24px;
    border: 2px solid #00708e;
    border-radius: 30px;
    color: #111827;
    text-decoration: none;
    font-weight: 800;
    transition: .3s;
    white-space: nowrap;
}

.top-btn:hover {
    background: #00708e;
    color: #fff;
}

.tiktok-btn {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: #000;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 10px 25px rgba(0,0,0,.35);
    transition: .3s;
}

.tiktok-btn svg {
    width: 27px;
    height: 27px;
}

.tiktok-btn:hover {
    transform: translateY(-3px) scale(1.05);
}

.hero-content {
    max-width: 570px;
    margin-top: 100px;
    position: relative;
    z-index: 5;
}

.hero-subtitle {
    color: #007da3;
    font-size: 31px;
    font-weight: 900;
    margin-bottom: 18px;
}

h1 {
    font-size: 48px;
    line-height: 1.12;
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 26px;
}

.hero-line {
    width: 78px;
    height: 3px;
    background: #007da3;
    margin-bottom: 28px;
}

.hero-content p {
    font-size: 18px;
    line-height: 1.45;
    margin-bottom: 30px;
    text-transform: uppercase;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: #00c95c;
    color: #fff;
    padding: 18px 34px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 900;
    box-shadow: 0 10px 25px rgba(0, 201, 92, .45);
    transition: .3s;
}

.whatsapp-btn:hover {
    transform: translateY(-3px);
    background: #00b552;
}

.stats {
    display: flex;
    gap: 32px;
    margin-top: 38px;
    flex-wrap: wrap;
}

.stats h3 {
    color: #007da3;
    font-size: 30px;
    font-weight: 900;
}

.stats span {
    font-size: 13px;
    color: #334155;
}

.air-conditioner {
    position: absolute;
    right: 7%;
    top: 145px;
    width: 48%;
    max-width: 680px;
    z-index: 2;
    filter: drop-shadow(0 25px 35px rgba(0,0,0,.15));
    animation: float 4s ease-in-out infinite;
}

.snowflake,
.ice {
    position: absolute;
    z-index: 3;
    opacity: .8;
    animation: snow 7s linear infinite;
}

.snowflake {
    color: #28a8d8;
    font-size: 38px;
}

.ice {
    width: 28px;
    height: 28px;
    background: rgba(86, 203, 244, .45);
    transform: rotate(45deg);
    border-radius: 6px;
    box-shadow: inset 0 0 12px rgba(255,255,255,.9);
}

.s1 { left: 55%; top: 23%; }
.s2 { right: 13%; top: 58%; animation-delay: 1.3s; }
.s3 { left: 63%; top: 70%; animation-delay: 2s; }
.i1 { right: 7%; top: 70%; }
.i2 { left: 52%; top: 57%; animation-delay: 1s; }

.temperature {
    position: absolute;
    right: 8%;
    bottom: 22%;
    background: rgba(255,255,255,.78);
    backdrop-filter: blur(8px);
    border-radius: 16px;
    padding: 16px 18px;
    font-size: 23px;
    font-weight: 900;
    color: #006c8f;
    box-shadow: 0 10px 30px rgba(0,0,0,.15);
    z-index: 4;
}

.services,
.advantages,
.contacts {
    padding: 90px 8%;
    background: #fff;
}

.services h2,
.advantages h2,
.contacts h2 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 50px;
}

.cards,
.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.card,
.adv-card {
    background: #f8fcff;
    border-radius: 22px;
    padding: 32px;
    text-align: center;
    box-shadow: 0 12px 30px rgba(0,0,0,.08);
    transition: .3s;
    border: 1px solid rgba(0, 125, 163, .12);
}

.card:hover,
.adv-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 18px 40px rgba(0, 125, 163, .18);
}

.card span,
.adv-card span {
    font-size: 46px;
}

.card h3,
.adv-card h3 {
    margin: 20px 0 12px;
    font-size: 22px;
}

.card p,
.adv-card p {
    color: #475569;
    line-height: 1.5;
}

.advantages {
    background: linear-gradient(180deg, #ffffff 0%, #eef8fb 100%);
}

.contacts {
    text-align: center;
    background: #071f2a;
    color: #fff;
}

.contacts p {
    max-width: 600px;
    margin: -25px auto 30px;
    color: #cbd5e1;
    font-size: 18px;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-18px); }
}

@keyframes snow {
    0% { transform: translateY(0) rotate(0); }
    100% { transform: translateY(45px) rotate(360deg); }
}

/* MOBILE */

@media (max-width: 768px) {
    .hero {
        min-height: 930px;
        padding: 20px 18px 60px;
        text-align: center;
    }

    .header {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 12px;
    }

    .logo {
        transform: scale(.9);
        transform-origin: left;
    }

    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 24px;
        margin-top: 8px;
        font-size: 13px;
    }

    .header-actions {
        gap: 6px;
    }

    .top-btn {
        padding: 10px 16px;
        font-size: 12px;
    }

    .tiktok-btn {
        width: 43px;
        height: 43px;
        border-radius: 12px;
    }

    .tiktok-btn svg {
        width: 22px;
        height: 22px;
    }

    .hero-content {
        max-width: 100%;
        margin: 58px auto 0;
        position: relative;
        z-index: 5;
    }

    .hero-subtitle,
    h1,
    .hero-line,
    .hero-content p,
    .whatsapp-btn,
    .stats {
        position: relative;
        z-index: 5;
    }

    .hero-subtitle {
        font-size: 18px;
        margin-bottom: 14px;
    }

    h1 {
        font-size: 36px;
        line-height: 1.05;
        margin-bottom: 22px;
        text-shadow:
            0 2px 10px rgba(255,255,255,.85),
            0 0 25px rgba(255,255,255,.9);
    }

    .hero-line {
        margin: 0 auto 22px;
    }

    .hero-content p {
        font-size: 14px;
        line-height: 1.5;
        margin-bottom: 24px;
        text-shadow: 0 2px 10px rgba(255,255,255,.85);
    }

    .air-conditioner {
        position: absolute;
        width: 145%;
        max-width: none;
        left: 47%;
        top: 215px;
        right: auto;
        transform: translateX(-50%);
        z-index: 1;
        opacity: .95;
        pointer-events: none;
    }

    .whatsapp-btn {
        width: 100%;
        padding: 16px 18px;
        font-size: 15px;
        border-radius: 14px;
    }

    .stats {
        justify-content: center;
        gap: 18px;
        margin-top: 30px;
    }

    .stats div {
        width: 30%;
        min-width: 95px;
    }

    .stats h3 {
        font-size: 24px;
    }

    .stats span {
        font-size: 11px;
    }

    .temperature {
        right: 18px;
        bottom: 100px;
        font-size: 18px;
        padding: 12px 14px;
        border-radius: 14px;
        z-index: 2;
    }

    .snowflake {
        font-size: 26px;
    }

    .services,
    .advantages,
    .contacts {
        padding: 60px 18px;
    }

    .services h2,
    .advantages h2,
    .contacts h2 {
        font-size: 30px;
        margin-bottom: 30px;
    }

    .cards,
    .adv-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .card,
    .adv-card {
        padding: 26px 20px;
        border-radius: 20px;
    }

    .contacts p {
        margin: -15px auto 25px;
        font-size: 15px;
    }
}

@media (max-width: 420px) {
    .hero {
        min-height: 900px;
        padding-left: 16px;
        padding-right: 16px;
    }

    .logo-text {
        font-size: 13px;
    }

    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 20px;
    }

    .top-btn {
        padding: 9px 13px;
        font-size: 11px;
    }

    .tiktok-btn {
        width: 40px;
        height: 40px;
    }

    .nav {
        font-size: 12px;
        gap: 18px;
    }

    h1 {
        font-size: 33px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .air-conditioner {
        width: 165%;
        left: 44%;
        top: 205px;
    }

    .stats {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .stats div {
        width: 100%;
    }

    .temperature {
        bottom: 120px;
    }
}