:root {
    color-scheme: light dark;
    font-size: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #f8fafc;
    min-height: 100vh;
}

main {
    max-width: 960px;
    margin: 0 auto;
    padding: 72px 24px 64px;
}

header {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 48px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 20px;
}

.brand img {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    box-shadow: 0 12px 28px rgba(56, 189, 248, 0.25);
}

header h1 {
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    margin: 0;
    font-weight: 700;
}

header p {
    margin: 0;
    font-size: 1.1rem;
    color: rgba(248, 250, 252, 0.85);
    line-height: 1.6;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 56px;
}

.actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    color: #0f172a;
    background: #38bdf8;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    min-width: 220px;
}

.actions a.secondary {
    background: rgba(148, 163, 184, 0.25);
    color: #f8fafc;
    border: 1px solid rgba(148, 163, 184, 0.35);
}

.actions a:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.25);
}

section {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 24px;
}

section h2 {
    margin: 0 0 16px;
    font-size: 1.5rem;
    font-weight: 600;
}

section ul {
    margin: 0;
    padding-left: 20px;
    line-height: 1.7;
    color: rgba(226, 232, 240, 0.92);
}

.language-note {
    font-size: 0.95rem;
    color: rgba(226, 232, 240, 0.75);
    margin-top: -12px;
    margin-bottom: 28px;
}

footer {
    margin-top: 48px;
    font-size: 0.85rem;
    color: rgba(148, 163, 184, 0.75);
}

@media (max-width: 640px) {
    main {
        padding: 56px 18px 48px;
    }

    .brand {
        gap: 16px;
    }

    .brand img {
        width: 60px;
        height: 60px;
    }

    section {
        padding: 24px;
    }

    .actions a {
        width: 100%;
    }
}