:root {
    --bg-color: #eeeeee;
    --nav-height: 50px;
    --card-bg: #ffffff;
    --border-color: rgba(143, 179, 154, 0.18);
    --title-color: #1d2731;
    --text-color: #334455;
    --muted-color: #6a7c8d;
    --accent: #98e0ac;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #1a1a1a;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-color);
    overflow: hidden;
}

.policy-wrapper {
    height: 100vh;
    height: 100dvh;
    max-width: 650px;
    margin: 0 auto;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding-bottom: env(safe-area-inset-bottom);
}

.policy-navbar {
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    flex: 0 0 auto;
}

.policy-navbar h1 {
    margin: 0;
    font-size: 1.5em;
    color: #1f1f1f;
    text-shadow: 0 0 6px rgba(0, 0, 0, 0.1);
}

.home-link {
    color: inherit;
    text-decoration: none;
}

.home-link:hover,
.home-link:focus-visible {
    color: #1f1f1f;
    text-decoration: none;
}

.policy-content {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: clamp(12px, 3vw, 20px);
    -webkit-overflow-scrolling: touch;
}

.policy-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    padding: clamp(16px, 4vw, 24px);
}

.policy-head {
    margin-bottom: 10px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.policy-head h2 {
    margin: 0;
    font-size: 1.35em;
    color: var(--title-color);
}

.policy-meta {
    margin: 8px 0 0;
    color: var(--muted-color);
    font-size: 12px;
}

.policy-section {
    margin-top: 14px;
}

.policy-section h3 {
    margin: 0 0 6px;
    font-size: 1.02em;
    color: var(--title-color);
}

.policy-section p {
    margin: 0;
    font-size: 14px;
    line-height: 1.68;
    color: var(--text-color);
}

/* =========================
   Responsive
   ========================= */
@media only screen and (max-width: 640px) {
    .policy-navbar {
        height: 44px;
    }

    .policy-navbar h1 {
        font-size: 1.3em;
    }

    .policy-content {
        padding: 12px;
    }

    .policy-card {
        border-radius: 14px;
        padding: clamp(14px, 3vw, 20px);
    }

    .policy-head h2 {
        font-size: 1.25em;
    }

    .policy-section h3 {
        font-size: 0.98em;
    }

    .policy-meta {
        font-size: 11px;
    }
}

@media only screen and (max-width: 420px) {
    .policy-content {
        padding: 10px;
    }

    .policy-card {
        border-radius: 12px;
        padding: 14px 12px;
    }

    .policy-head h2 {
        font-size: 1.18em;
    }

    .policy-section {
        margin-top: 12px;
    }
}

@media only screen and (max-width: 360px) {
    .policy-content {
        padding: 8px;
    }

    .policy-card {
        padding: 12px 10px;
        border-radius: 10px;
    }
}