:root {
    --bg: #0b0d12;
    --bg-soft: #111521;
    --panel: #171d2a;
    --text: #f5f7ff;
    --muted: #b6bfd6;
    --line: #2a3247;
    --accent-a: #00e4ff;
    --accent-b: #ff8a00;
    --accent-c: #ff3158;
    --success: #3ce58f;
    --radius-lg: 18px;
    --radius-md: 12px;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
    --max: 1120px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 8% 12%, rgba(0, 228, 255, 0.14), transparent 32%),
        radial-gradient(circle at 90% 22%, rgba(255, 49, 88, 0.16), transparent 28%),
        linear-gradient(165deg, #090b10 8%, #0d1119 42%, #141a29 100%);
    min-height: 100vh;
    line-height: 1.6;
}

.noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.12;
    background-image: radial-gradient(rgba(255, 255, 255, 0.16) 0.5px, transparent 0.5px);
    background-size: 3px 3px;
    z-index: -1;
}

.container {
    width: min(var(--max), 92vw);
    margin: 0 auto;
}

header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    backdrop-filter: blur(8px);
    background: linear-gradient(to bottom, rgba(9, 11, 16, 0.82), rgba(9, 11, 16, 0.45));
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 20;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.brand {
    font-weight: 800;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-dot {
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
    box-shadow: 0 0 20px rgba(0, 228, 255, 0.65);
}

.nav-cta {
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 16px;
    border-radius: 999px;
    transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
    white-space: nowrap;
}

.nav-cta:hover,
.nav-cta:focus-visible {
    transform: translateY(-2px);
    border-color: var(--accent-a);
    background: rgba(0, 228, 255, 0.1);
    outline: none;
}

.hero {
    padding: 78px 0 56px;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 24px;
    align-items: center;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.08;
    letter-spacing: 0.02em;
}

.hero .accent {
    display: inline-block;
    background: linear-gradient(90deg, var(--accent-a), #8df9ff 40%, #fff 70%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    margin: 18px 0 28px;
    color: var(--muted);
    max-width: 52ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    text-decoration: none;
    border-radius: 999px;
    padding: 12px 20px;
    font-weight: 700;
    transition: transform 0.25s ease, filter 0.25s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-b), var(--accent-c));
    color: #fff;
}

.btn-secondary {
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.02);
}

.btn:hover,
.btn:focus-visible {
    transform: translateY(-2px);
    filter: saturate(1.12);
    outline: none;
}

.hero-panel {
    background: linear-gradient(160deg, rgba(0, 228, 255, 0.08), rgba(255, 138, 0, 0.1));
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow);
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.kpi {
    background: rgba(7, 10, 18, 0.68);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 14px;
}

.kpi strong {
    display: block;
    font-size: 1.55rem;
    line-height: 1.1;
}

.kpi span {
    color: var(--muted);
    font-size: 0.92rem;
}

section {
    padding: 24px 0 18px;
}

.section-title {
    margin: 0 0 10px;
    font-size: clamp(1.3rem, 2.8vw, 2rem);
    letter-spacing: 0.01em;
}

.section-desc {
    margin: 0 0 20px;
    color: var(--muted);
    max-width: 70ch;
}

.cards-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.card {
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 18px;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 228, 255, 0.52);
}

.card h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
}

.card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.flow {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    counter-reset: item;
}

.flow-item {
    position: relative;
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: rgba(23, 29, 42, 0.72);
}

.flow-item::before {
    counter-increment: item;
    content: counter(item);
    position: absolute;
    top: -11px;
    left: 12px;
    width: 22px;
    height: 22px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    font-size: 0.76rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-a), var(--accent-c));
    color: #fff;
}

.qr-wrap {
    margin-top: 10px;
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.qr-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 14px;
    text-align: center;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.qr-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 138, 0, 0.75);
}

.qr-name {
    margin: 0 0 10px;
    font-weight: 700;
    font-size: 0.95rem;
}

.qr-placeholder {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.86) 50%, transparent 50%) 0 0 / 14px 14px,
        linear-gradient(rgba(255, 255, 255, 0.86) 50%, transparent 50%) 0 0 / 14px 14px,
        linear-gradient(135deg, #0c0f16, #222b3d 60%, #162139);
}

.qr-placeholder::before,
.qr-placeholder::after {
    content: "";
    position: absolute;
    width: 28%;
    aspect-ratio: 1 / 1;
    border: 5px solid #fff;
    background: rgba(255, 255, 255, 0.08);
}

.qr-placeholder::before {
    top: 8%;
    left: 8%;
}

.qr-placeholder::after {
    right: 8%;
    bottom: 8%;
}

.qr-tip {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 0.8rem;
}

.contact {
    margin: 18px 0 42px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: rgba(13, 17, 25, 0.7);
    display: flex;
    flex-wrap: wrap;
    gap: 16px 26px;
    align-items: center;
    justify-content: space-between;
}

.contact strong {
    color: var(--success);
}

footer {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding: 18px 0 28px;
    color: var(--muted);
    font-size: 0.9rem;
}

.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.show {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1060px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .qr-wrap {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    header {
        position: static;
    }

    .cards-3 {
        grid-template-columns: 1fr;
    }

    .flow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .qr-wrap {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hero {
        padding-top: 46px;
    }

    .contact {
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .flow {
        grid-template-columns: 1fr;
    }

    .qr-wrap {
        grid-template-columns: 1fr;
    }
}