:root {
    color-scheme: dark;
    --bg: #09111f;
    --bg-soft: rgba(255, 255, 255, 0.04);
    --card: rgba(10, 18, 34, 0.84);
    --line: rgba(255, 255, 255, 0.08);
    --text: #ecf2ff;
    --muted: #9eb0cc;
    --accent: #77e3c8;
    --accent-soft: rgba(119, 227, 200, 0.14);
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(48, 116, 255, 0.22), transparent 32%),
        radial-gradient(circle at top right, rgba(119, 227, 200, 0.18), transparent 28%),
        linear-gradient(160deg, #07101c 0%, #0b1424 42%, #08111d 100%);
}

.shell-page {
    width: min(1100px, calc(100vw - 32px));
    margin: 0 auto;
    padding: 40px 0 56px;
}

.hero-card,
.info-card,
.note-card {
    border: 1px solid var(--line);
    background: var(--card);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.hero-card {
    padding: 28px;
    border-radius: 28px;
}

.hero-topline {
    display: inline-flex;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-brand {
    display: flex;
    gap: 18px;
    align-items: center;
    margin-top: 18px;
}

.hero-logo {
    width: 68px;
    height: 68px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
}

h1,
h2,
p,
ul {
    margin: 0;
}

h1 {
    font-size: clamp(32px, 6vw, 54px);
    line-height: 1;
    letter-spacing: -0.04em;
}

.hero-subtitle {
    margin-top: 10px;
    max-width: 700px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.65;
}

.hero-copy {
    margin-top: 20px;
    max-width: 760px;
    color: var(--text);
    font-size: 15px;
    line-height: 1.8;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.hero-badges span {
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--bg-soft);
    color: var(--muted);
    font-size: 13px;
}

.info-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 18px;
}

.info-card,
.note-card {
    border-radius: 22px;
    padding: 22px;
}

.info-card h2,
.note-card h2 {
    margin-bottom: 14px;
    font-size: 18px;
}

.info-card ul {
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.85;
}

.note-card {
    margin-top: 18px;
}

.note-card p {
    color: var(--muted);
    line-height: 1.85;
}

@media (max-width: 860px) {
    .info-grid {
        grid-template-columns: 1fr;
    }

    .hero-brand {
        align-items: flex-start;
    }
}

@media (max-width: 520px) {
    .shell-page {
        width: min(100vw - 20px, 1100px);
        padding: 20px 0 32px;
    }

    .hero-card,
    .info-card,
    .note-card {
        border-radius: 20px;
        padding: 18px;
    }

    .hero-brand {
        flex-direction: column;
    }

    .hero-logo {
        width: 56px;
        height: 56px;
    }
}