@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Nunito, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #2d3748;
    background: #f0f2f5;
}

/* ===== Header bar ===== */
.help-header {
    background: linear-gradient(135deg, #3E647E 0%, #1a3a4f 100%);
    color: #fff;
    padding: 16px 24px;
}

.help-header-content {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
}

.help-header-app {
    font-weight: 700;
}

.help-header-sep {
    opacity: 0.5;
}

.help-header-page {
    font-weight: 400;
    opacity: 0.85;
}

/* ===== Main container ===== */
.help-container {
    max-width: 860px;
    margin: 24px auto;
    padding: 0 16px;
}

/* ===== Content card ===== */
.help-card {
    background: #fff;
    border: 1px solid #d1d9e6;
    border-radius: 8px;
    padding: 32px 36px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

/* ===== Typography ===== */
.help-card h1 {
    font-size: 22px;
    font-weight: 800;
    color: #1e3a5f;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e2e8f0;
}

.help-card h2 {
    font-size: 17px;
    font-weight: 700;
    color: #3E647E;
    margin-top: 28px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #e2e8f0;
}

.help-card p {
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 14px;
    max-width: 700px;
}

.help-card ul {
    color: #4a5568;
    line-height: 1.7;
    margin: 12px 0 16px 20px;
    max-width: 700px;
}

.help-card li {
    margin-bottom: 6px;
}

/* ===== Images ===== */
.help-img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 1px solid #d1d9e6;
    border-radius: 6px;
    margin: 16px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* ===== Note callout ===== */
.help-note {
    background: #e8f0fe;
    border-left: 4px solid #428bca;
    border-radius: 4px;
    padding: 12px 16px;
    margin: 16px 0;
    color: #4a5568;
    line-height: 1.6;
}

/* ===== Footer ===== */
.help-footer {
    text-align: center;
    padding: 24px 16px;
    color: #6b7a8d;
    font-size: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
    .help-header {
        padding: 12px 16px;
    }

    .help-card {
        padding: 20px 16px;
    }
}