html,
body {
    margin: 0;
    min-height: 100%;
}

html {
    scroll-behavior: smooth;
}

body {
    position: relative;
    color: #e8eef2;
    font-family: "SF Pro Display", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    background: #061018;
}

.page-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(1100px 520px at 8% -8%, color-mix(in srgb, var(--c2) 42%, transparent), transparent 62%),
        radial-gradient(900px 480px at 100% 12%, color-mix(in srgb, var(--c1) 38%, transparent), transparent 58%),
        radial-gradient(700px 400px at 50% 110%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
        linear-gradient(165deg, #07141c 0%, #0b1c24 48%, #081218 100%);
}

.page-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, #000 18%, transparent 78%);
    pointer-events: none;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    opacity: 0.86;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 6vw;
    background: rgba(6, 16, 24, 0.62);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #fff;
}

.brand-icon {
    width: 2.1rem;
    height: 2.1rem;
    border-radius: 0.7rem;
    background: #fff center / cover no-repeat;
    box-shadow: 0 0 1.2rem color-mix(in srgb, var(--accent) 45%, transparent);
}

.brand-name {
    font-weight: 650;
    letter-spacing: 0.04em;
}

.site-nav nav {
    display: flex;
    gap: 1.4rem;
}

.site-nav nav a {
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.92rem;
}

.nav-toggle {
    display: none;
    width: 2.4rem;
    height: 2.4rem;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 0.6rem;
    background: rgba(255, 255, 255, 0.04);
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 1rem;
    height: 1px;
    margin: 5px auto;
    background: #fff;
}

main {
    padding: 0 6vw 4rem;
}

.hero {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
    align-items: center;
    min-height: calc(100vh - 4.6rem);
    padding: 3rem 0 4rem;
}

.kicker {
    margin: 0 0 0.7rem;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 650;
    letter-spacing: 0.28em;
}

h1,
h2,
h3 {
    margin: 0;
    color: #fff;
    letter-spacing: 0.02em;
}

h1 {
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    line-height: 1.15;
}

h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
}

h3 {
    font-size: 1.25rem;
}

.hero-tagline,
.section-lead {
    max-width: 40rem;
    color: rgba(232, 238, 242, 0.78);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin: 1.8rem 0 1.1rem;
}

.hero-meta {
    margin: 0;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.88rem;
}

.btn-cta,
.btn-ghost,
.btn-cta-disabled,
.btn-cta-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 9.5rem;
    padding: 0.85rem 1.4rem;
    border-radius: 999px;
    font-size: 0.98rem;
    font-weight: 650;
}

.btn-cta {
    color: #081218;
    background: var(--accent);
    box-shadow: 0 0 1.8rem color-mix(in srgb, var(--accent) 45%, transparent);
}

.btn-ghost,
.btn-cta-ghost {
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: rgba(255, 255, 255, 0.05);
}

.btn-cta-disabled,
.btn-cta-ghost {
    cursor: default;
    opacity: 0.88;
}

.hero-visual {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 22rem;
}

.hero-orb {
    position: absolute;
    width: 22rem;
    height: 22rem;
    border-radius: 50%;
    background: radial-gradient(circle, color-mix(in srgb, var(--c2) 55%, transparent), transparent 68%);
    filter: blur(8px);
    animation: pulse 6s ease-in-out infinite;
}

.hero-icon {
    position: relative;
    width: 8.5rem;
    height: 8.5rem;
    border-radius: 2rem;
    background: #fff center / cover no-repeat;
    border: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.08),
        0 1.5rem 3.5rem rgba(0, 0, 0, 0.35),
        0 0 2.4rem color-mix(in srgb, var(--accent) 40%, transparent);
}

.section {
    padding: 4.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.section-lead {
    margin: 0.9rem 0 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.feature-card,
.phone-frame,
.download-section {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.feature-card {
    padding: 1.3rem 1.2rem 1.4rem;
    border-radius: 1.1rem;
}

.feature-index {
    display: block;
    margin-bottom: 1.1rem;
    color: var(--accent);
    font-size: 0.78rem;
    letter-spacing: 0.16em;
}

.feature-card p {
    margin: 0.55rem 0 0;
    color: rgba(232, 238, 242, 0.72);
    font-size: 0.92rem;
}

.showcase-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 2.6rem;
}

.showcase-item.is-reverse .showcase-copy {
    order: 2;
}

.showcase-copy p {
    color: rgba(232, 238, 242, 0.76);
}

.phone-frame {
    justify-self: center;
    width: min(100%, 280px);
    overflow: hidden;
    border-radius: 1.6rem;
    box-shadow: 0 0 2.8rem color-mix(in srgb, var(--accent) 22%, transparent);
}

.phone-frame img {
    display: block;
    width: 100%;
}

.download-section {
    padding: 2.4rem 2rem;
    border-radius: 1.4rem;
    box-shadow: inset 0 0 4rem color-mix(in srgb, var(--c2) 12%, transparent);
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    padding: 2rem 6vw 2.4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.28);
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.9rem;
}

.site-footer p {
    margin: 0.15rem 0;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.86);
}

.sep {
    margin: 0 0.45rem;
    color: rgba(255, 255, 255, 0.3);
}

.wx-hint {
    position: fixed;
    inset: 0;
    z-index: 80;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(8px);
}

.app-hint {
    width: min(92vw, 22rem);
}

.app-hint-text {
    margin: 0 0 1rem;
    padding: 1rem 0.9rem;
    border-radius: 1rem;
    color: #1a1a1a;
    background: #eee;
}

.app-hint-text span {
    color: #07c160;
    font-weight: 700;
}

@keyframes pulse {
    0%,
    100% {
        transform: scale(1);
        opacity: 0.85;
    }
    50% {
        transform: scale(1.08);
        opacity: 1;
    }
}

@media (max-width: 960px) {
    .hero,
    .showcase-item,
    .feature-grid,
    .site-footer {
        grid-template-columns: 1fr;
        display: block;
    }

    .hero-visual {
        min-height: 16rem;
        margin-top: 1rem;
    }

    .hero-orb {
        width: 16rem;
        height: 16rem;
    }

    .feature-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .showcase-item.is-reverse .showcase-copy {
        order: 0;
    }

    .showcase-copy {
        margin-bottom: 1.2rem;
    }

    .site-footer {
        display: flex;
        flex-direction: column;
    }
}

@media (max-width: 720px) {
    .site-nav nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        padding: 0.4rem 0 0.8rem;
        background: rgba(6, 16, 24, 0.96);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-nav nav.is-open {
        display: flex;
    }

    .site-nav nav a {
        padding: 0.75rem 6vw;
    }

    .nav-toggle {
        display: inline-block;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    main {
        padding: 0 5vw 3rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .hero-orb {
        animation: none;
    }
}