/* ========== 帮助页 — Flat SaaS ========== */

/* ---------- 01 页首 + 搜索 ---------- */
.h-hero { padding: clamp(56px, 7vw, 88px) 0 24px; }
.h-hero-main { max-width: 680px; }
.h-title {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    font-size: clamp(28px, 4vw, 44px);
    color: var(--ink);
    text-wrap: balance;
}
.h-title em { font-style: normal; color: var(--navy); }
.h-lead {
    margin-top: 16px;
    font-size: 16px;
    line-height: 1.85;
    color: var(--ink-2);
    max-width: 560px;
}

.search-wrap { margin-top: 30px; max-width: 640px; }
.search-label { display: block; font-size: 13px; font-weight: 700; color: var(--ink-2); margin-bottom: 10px; letter-spacing: 0.04em; }
.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card);
    border: 2px solid var(--line-strong);
    border-radius: 999px;
    padding: 6px 8px 6px 20px;
    transition: border-color var(--t-fast);
}
.search-box:focus-within { border-color: var(--blue); }
.search-box i { color: var(--ink-3); font-size: 15px; }
.search-box input {
    flex: 1;
    border: none;
    outline: none;
    background: none;
    font-family: inherit;
    font-size: 15px;
    color: var(--ink);
    padding: 10px 0;
}
.search-key {
    font-size: 11.5px;
    color: var(--ink-3);
    background: var(--card-soft);
    border: 1px solid var(--line);
    border-radius: 7px;
    padding: 4px 9px;
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.search-hint { margin-top: 9px; font-size: 12.5px; color: var(--ink-3); }

/* ---------- 02 分类磁贴 ---------- */
.h-cats { padding: 40px 0 0; }
.cat-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}
.cat-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: center;
    align-items: center;
    transition: border-color var(--t-fast), transform var(--t-fast);
}
.cat-card:hover { border-color: var(--blue); transform: translateY(-3px); }
.cat-idx { font-family: var(--font-display); font-size: 11.5px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.08em; }
.cat-icon {
    width: 52px; height: 52px;
    display: flex; align-items: center; justify-content: center;
    background: var(--blue-soft);
    color: var(--blue);
    border-radius: 50%;
    font-size: 19px;
    margin: 4px 0;
}
.cat-title { font-family: var(--font-display); font-weight: 600; font-size: 15px; color: var(--ink); }
.cat-desc { font-size: 12.5px; line-height: 1.7; color: var(--ink-3); min-height: 42px; }
.cat-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--blue);
    opacity: 0;
    transform: translateY(4px);
    transition: all var(--t-fast);
}
.cat-card:hover .cat-link { opacity: 1; transform: translateY(0); }
.cat-link i { font-size: 11px; }

/* ---------- 03 内容块 ---------- */
.h-blocks { padding: var(--space-sec) 0 0; }

.h-block {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
    margin-bottom: 18px;
    scroll-margin-top: calc(var(--nav-height) + 20px);
}
.h-block-head {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 18px;
}
.h-block-idx {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    color: var(--blue);
    background: var(--blue-soft);
    border-radius: 8px;
    padding: 3px 10px;
}
.h-block-icon {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: var(--navy);
    color: #fff;
    border-radius: 11px;
    font-size: 16px;
}
.h-block-title { font-family: var(--font-display); font-size: 19px; font-weight: 600; color: var(--ink); }
.h-block-tag {
    margin-left: auto;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--green-deep);
    background: var(--green-soft);
    border: 1px solid #a7f3d0;
    border-radius: 999px;
    padding: 4px 12px;
}

.h-block-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.hitem {
    background: var(--card-soft);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--t-fast);
}
.hitem:hover { border-color: var(--line-strong); }
.hitem summary {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 18px;
    cursor: pointer;
    list-style: none;
    user-select: none;
}
.hitem summary::-webkit-details-marker { display: none; }
.hitem-num {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    color: var(--blue);
    background: var(--blue-soft);
    border-radius: 7px;
    padding: 3px 9px;
    flex: none;
}
.hitem-q { font-size: 14.5px; font-weight: 600; color: var(--ink); }
.hitem-icon {
    margin-left: auto;
    color: var(--ink-3);
    font-size: 12px;
    transition: transform var(--t-fast);
    flex: none;
}
.hitem[open] .hitem-icon { transform: rotate(180deg); color: var(--blue); }
.hitem-a {
    padding: 0 18px 16px 58px;
    font-size: 13.5px;
    line-height: 1.85;
    color: var(--ink-2);
}

/* ---------- 04 CTA ---------- */
.h-cta { padding: 40px 0 var(--space-sec); }
.h-cta-panel {
    background: var(--navy);
    border-radius: 20px;
    padding: clamp(36px, 5vw, 52px) clamp(28px, 4vw, 48px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 28px;
    flex-wrap: wrap;
}
.h-cta-text { display: flex; flex-direction: column; gap: 8px; }
.h-cta-kicker { font-size: 12px; font-weight: 700; letter-spacing: 0.22em; color: #7dd3fc; }
.h-cta-title { font-family: var(--font-display); font-weight: 600; font-size: clamp(20px, 2.6vw, 28px); color: #fff; }
.h-cta-sub { font-size: 14px; color: #cbd5e1; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .cat-grid { grid-template-columns: repeat(3, 1fr); }
    .cat-desc { min-height: 0; }
}

@media (max-width: 768px) {
    .cat-grid { grid-template-columns: 1fr 1fr; }
    .h-block-items { grid-template-columns: 1fr; }
    .h-cta-panel { flex-direction: column; align-items: flex-start; }
    .h-cta-panel .btn { width: 100%; }
}

@media (max-width: 480px) {
    .cat-grid { grid-template-columns: 1fr; }
    .search-key { display: none; }
}