:root {
    --ink: #0b1720;
    --muted: #62707c;
    --line: #dce4df;
    --green: #119447;
    --yellow: #ffd429;
    --bg: #f5f8f4;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #fff 0, var(--bg) 420px);
}
a { color: inherit; text-decoration: none; }
.help-topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px clamp(14px, 3vw, 34px);
    background: rgba(255,255,255,.94);
    border-bottom: 1px solid var(--line);
}
.help-brand img {
    display: block;
    width: 150px;
    height: 50px;
    object-fit: contain;
    object-position: left center;
}
.help-topbar nav {
    display: flex;
    align-items: center;
    gap: 14px;
    font-weight: 800;
    font-size: 14px;
}
.help-topbar select {
    min-height: 40px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 10px;
    background: #fff;
    font-weight: 800;
}
.help-shell {
    width: min(1160px, 100%);
    margin: 0 auto;
    padding: 18px;
}
.help-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 18px;
    align-items: end;
    padding: clamp(28px, 6vw, 72px);
    min-height: 440px;
    border-radius: 18px;
    color: #fff;
    background:
        linear-gradient(110deg, rgba(5,18,25,.96), rgba(5,18,25,.82), rgba(5,18,25,.48)),
        url("../assets/auto-ad1.png") center right / cover;
    box-shadow: 0 26px 80px rgba(11,23,32,.18);
}
.eyebrow {
    margin: 0 0 10px;
    color: #79d99f;
    text-transform: uppercase;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .04em;
}
.help-hero h1 {
    max-width: 760px;
    margin: 0;
    font-size: clamp(38px, 7vw, 78px);
    line-height: .96;
}
.help-hero p {
    max-width: 650px;
    color: #e4efe7;
    font-size: 18px;
    line-height: 1.5;
}
.quick-card {
    display: grid;
    gap: 8px;
    padding: 18px;
    border-radius: 14px;
    background: rgba(255,255,255,.94);
    color: var(--ink);
}
.quick-card a {
    color: var(--green);
    overflow-wrap: anywhere;
    font-weight: 800;
}
.role-tabs {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
    margin: 18px 0;
}
.role-tabs a {
    display: grid;
    place-items: center;
    min-height: 46px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    font-weight: 900;
}
.workflow-panel, .guide-card, .qa-section {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px;
    box-shadow: 0 14px 42px rgba(11,23,32,.06);
}
.workflow-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}
.workflow-grid div {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #f8fbf8;
}
.workflow-grid span {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    margin-bottom: 10px;
    border-radius: 50%;
    background: var(--green);
    color: #fff;
    font-weight: 900;
}
.workflow-grid strong { display: block; margin-bottom: 6px; }
.workflow-grid p, .guide-card li, .guide-card p, .qa-section p {
    color: var(--muted);
    line-height: 1.55;
}
.help-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}
.guide-card h2 { margin-top: 0; }
.guide-card ol, .guide-card ul { padding-left: 20px; }
.guide-card li { margin-bottom: 9px; }
.note, .warning, .formula {
    padding: 13px 14px;
    border-radius: 8px;
    font-weight: 800;
    line-height: 1.45;
}
.note { background: #eaf8ef; color: #0c6f38; }
.warning { background: #fff3c4; color: #755100; }
.formula {
    margin: 12px 0;
    background: #0b1720;
    color: #fff;
    text-align: center;
}
.split-help {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}
.qa-section { margin-top: 18px; }
.qa-section .eyebrow { color: var(--green); }
details {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 13px 14px;
    margin-bottom: 10px;
    background: #fbfdfb;
}
summary {
    cursor: pointer;
    font-weight: 900;
}

@media (max-width: 800px) {
    .help-topbar { align-items: flex-start; }
    .help-brand img { width: 118px; height: 40px; }
    .help-topbar nav { gap: 8px; font-size: 12px; }
    .help-topbar nav a { display: none; }
    .help-shell { padding: 12px; }
    .help-hero, .role-tabs, .workflow-grid, .help-grid, .split-help { grid-template-columns: 1fr; }
    .help-hero {
        min-height: auto;
        padding: 24px;
    }
    .help-hero h1 { font-size: clamp(36px, 12vw, 56px); }
}