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

:root {
    --blue: #B3D8F0;
    --pink: #F2C4CE;
    --yellow: #F5E6A3;
    --purple: #D4BDE6;
    --blue-soft: #ddedf8;
    --pink-soft: #fae6ec;
    --yellow-soft: #faf3d4;
    --purple-soft: #ece0f4;
    --text-dark: #2c2c3a;
    --text-medium: #5a5a72;
    --text-light: #8888a0;
    --white: #ffffff;
    --radius: 20px;
    --shadow: 0 8px 32px rgba(0,0,0,0.08);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        url('https://images.unsplash.com/photo-1596462502278-27bfdc403348?w=1920&q=80') center/cover no-repeat;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background: rgba(255, 255, 255, 0.88);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.35s ease;
    background: transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-img {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    object-fit: cover;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--pink), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 18px;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-dark);
    background: var(--pink-soft);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5.5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5.5px);
}

.banner {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.banner-bg {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1522335789203-aabd1fc54bc9?w=1920&q=80') center/cover no-repeat;
    z-index: 0;
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.75);
    z-index: 1;
}

.color-strips {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    height: 6px;
    z-index: 3;
}

.strip {
    flex: 1;
}

.strip-blue {
    background: var(--blue);
}

.strip-pink {
    background: var(--pink);
}

.strip-yellow {
    background: var(--yellow);
}

.strip-purple {
    background: var(--purple);
}

.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 120px 32px 80px;
    max-width: 720px;
}

.banner-icon-wrapper {
    margin-bottom: 28px;
}

.banner-icon {
    width: 110px;
    height: 110px;
    border-radius: 28px;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--white);
}

.banner-title {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: -1px;
    line-height: 1.1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #c06080, #9070c0, #60a0d0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-subtitle {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-medium);
    margin-bottom: 20px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.banner-desc {
    font-size: 1.05rem;
    color: var(--text-medium);
    line-height: 1.8;
    max-width: 560px;
    margin: 0 auto 36px;
}

.banner-cta {
    display: inline-block;
    padding: 14px 40px;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--pink), var(--purple));
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(212, 189, 230, 0.4);
}

.banner-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(212, 189, 230, 0.6);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.scroll-arrow {
    width: 28px;
    height: 28px;
    border-right: 2.5px solid var(--text-light);
    border-bottom: 2.5px solid var(--text-light);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.6; }
    50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

.intro {
    padding: 100px 32px 80px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

.title-decoration {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-blue { background: var(--blue); }
.dot-pink { background: var(--pink); }
.dot-yellow { background: var(--yellow); }
.dot-purple { background: var(--purple); }

.features-grid {
    display: flex;
    flex-direction: column;
    gap: 64px;
}

.feature-card {
    display: flex;
    align-items: center;
    gap: 60px;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card.reverse {
    flex-direction: row-reverse;
}

.feature-image-wrapper {
    flex: 0 0 280px;
    position: relative;
}

.feature-image-wrapper::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: calc(var(--radius) + 6px);
    z-index: -1;
}

.feature-card:nth-child(1) .feature-image-wrapper::before {
    background: var(--blue);
}

.feature-card:nth-child(2) .feature-image-wrapper::before {
    background: var(--pink);
}

.feature-card:nth-child(3) .feature-image-wrapper::before {
    background: var(--yellow);
}

.feature-card:nth-child(4) .feature-image-wrapper::before {
    background: var(--purple);
}

.feature-image {
    width: 100%;
    aspect-ratio: 9 / 20;
    object-fit: cover;
    border-radius: var(--radius);
    display: block;
    box-shadow: var(--shadow);
}

.feature-content {
    flex: 1;
}

.feature-icon-badge {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.badge-blue { background: var(--blue); }
.badge-pink { background: var(--pink); }
.badge-yellow { background: var(--yellow); }
.badge-purple { background: var(--purple); }

.feature-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-dark);
}

.feature-text {
    font-size: 1rem;
    color: var(--text-medium);
    line-height: 1.85;
}

.screenshots {
    padding: 80px 32px 100px;
    max-width: 1200px;
    margin: 0 auto;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    justify-items: center;
}

.screenshot-item {
    text-align: center;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.screenshot-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.screenshot-item:nth-child(2) { transition-delay: 0.1s; }
.screenshot-item:nth-child(3) { transition-delay: 0.2s; }
.screenshot-item:nth-child(4) { transition-delay: 0.3s; }

.phone-frame {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 6px solid #1a1a2e;
    background: #1a1a2e;
    transition: transform 0.4s ease;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40%;
    height: 18px;
    background: #1a1a2e;
    border-radius: 0 0 14px 14px;
    z-index: 2;
}

.phone-frame:hover {
    transform: translateY(-8px);
}

.screenshot-img {
    width: 100%;
    aspect-ratio: 9 / 20;
    object-fit: cover;
    display: block;
}

.screenshot-label {
    margin-top: 16px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-medium);
}

.footer {
    position: relative;
    background: var(--text-dark);
    color: rgba(255,255,255,0.7);
    overflow: hidden;
}

.footer-color-strips {
    display: flex;
    height: 6px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 32px 36px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 24px;
}

.footer-logo {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    object-fit: cover;
}

.footer-logo-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
}

.footer-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 28px;
}

.footer-nav a {
    text-decoration: none;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--white);
}

.footer-contact {
    margin-bottom: 24px;
}

.footer-contact p {
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.footer-contact i {
    color: var(--pink);
}

.footer-divider {
    width: 80px;
    height: 2px;
    margin: 0 auto 20px;
    background: linear-gradient(to right, var(--blue), var(--pink), var(--yellow), var(--purple));
    border-radius: 2px;
}

.footer-copy {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.4);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

@media (max-width: 900px) {
    .feature-card,
    .feature-card.reverse {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    .feature-image-wrapper {
        flex: 0 0 auto;
        width: 220px;
        margin: 0 auto;
    }

    .feature-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .section-title {
        font-size: 2rem;
    }

    .banner-title {
        font-size: 3rem;
    }
}

@media (max-width: 640px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 260px;
        height: 100vh;
        background: rgba(255,255,255,0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 4px;
        transition: right 0.35s ease;
        box-shadow: -4px 0 30px rgba(0,0,0,0.1);
    }

    .nav.open {
        right: 0;
    }

    .nav-link {
        width: 100%;
        text-align: left;
        padding: 12px 18px;
        font-size: 1.05rem;
    }

    .header-inner {
        padding: 14px 20px;
    }

    .banner-content {
        padding: 120px 20px 80px;
    }

    .banner-title {
        font-size: 2.5rem;
    }

    .banner-subtitle {
        font-size: 1rem;
    }

    .banner-desc {
        font-size: 0.95rem;
    }

    .intro {
        padding: 72px 20px 60px;
    }

    .screenshots {
        padding: 60px 20px 72px;
    }

    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .phone-frame {
        border-width: 4px;
        border-radius: 18px;
    }

    .phone-frame::before {
        height: 12px;
        border-radius: 0 0 10px 10px;
    }

    .feature-image-wrapper {
        width: 180px;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
    }

    .feature-title {
        font-size: 1.3rem;
    }

    .feature-text {
        font-size: 0.93rem;
    }

    .footer-inner {
        padding: 36px 20px 28px;
    }

    .footer-copy {
        font-size: 0.72rem;
    }
}