/* 使用帮助中心 */
.h-page { max-width: 1040px; margin: 0 auto; padding: 32px 0 24px; display: grid; gap: 8px; }
.h-doc { max-width: 1040px; }
.g-head { display: grid; gap: 12px; margin-bottom: 18px; }
.g-head h1, .h-ptitle h1 { margin: 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.15; font-weight: 900; letter-spacing: -.02em; text-wrap: balance; }
.g-toc { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.g-toc a { display: inline-flex; align-items: center; height: 32px; padding: 0 12px; border-radius: var(--mk-r-full); background: var(--mk-surface-2); border: 1px solid var(--mk-border); color: var(--mk-text-2); text-decoration: none; font-size: 13.5px; font-weight: 600; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.h-search input { width: 100%; max-width: 480px; height: 46px; padding: 0 16px; border-radius: var(--mk-r-full); border: 1px solid var(--mk-border-strong); background: var(--mk-surface); color: var(--mk-text); font: inherit; font-size: 15px; }
.h-search input:focus { outline: 2px solid var(--mk-accent-line); border-color: var(--mk-accent); }

.h-sec { padding: 26px 0 6px; border-top: 1px solid var(--mk-border); display: grid; gap: 14px; scroll-margin-top: 80px; }
.h-sec > h2 { margin: 0; font-size: 20px; font-weight: 800; letter-spacing: -.01em; }
.h-sub { margin: -6px 0 0; color: var(--mk-muted); font-size: 14.5px; }

.h-topics { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.h-topic { padding: 16px 18px; display: grid; gap: 6px; text-decoration: none; color: inherit; transition: border-color .15s; }
.h-topic:hover { border-color: var(--mk-accent-line); }
.h-topic b { font-size: 15.5px; }
.h-topic span { font-size: 13.5px; color: var(--mk-muted); line-height: 1.6; }

.h-group { display: grid; gap: 8px; }
.h-group h3 { margin: 6px 0 0; font-size: 13px; font-weight: 700; color: var(--mk-muted); letter-spacing: .04em; }
.h-prods { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 8px; }
.h-prod { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: var(--mk-r-md); border: 1px solid var(--mk-border); background: var(--mk-surface); color: inherit; text-decoration: none; min-width: 0; }
.h-prod:hover { border-color: var(--mk-accent-line); }
.h-prod-text { display: grid; min-width: 0; flex: 1; }
.h-prod-text b { font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.h-prod-text small { font-size: 12.5px; color: var(--mk-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.h-mode { flex: none; font-size: 11.5px; font-weight: 700; padding: 2px 8px; border-radius: var(--mk-r-full); white-space: nowrap; }
.h-mode--account { color: var(--mk-accent-ink); background: var(--mk-accent-soft); }
.h-mode--activate { color: var(--mk-ok); background: var(--mk-ok-soft); }
.h-mode--redeem { color: var(--mk-info); background: var(--mk-info-soft); }

.h-combos { display: grid; gap: 12px; }
.h-combo { padding: 16px 18px; display: grid; gap: 12px; }
.h-combo header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.h-combo h3 { margin: 0; font-size: 16.5px; }
.h-combo header span { font-size: 13px; color: var(--mk-muted); }
.h-chain { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 0; }
.h-chain li { display: flex; align-items: stretch; min-width: 0; }
.h-chain li + li::before { content: "→"; align-self: center; color: var(--mk-subtle); padding: 0 8px; }
.h-step { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: var(--mk-r-md); border: 1px solid var(--mk-border); background: var(--mk-surface-2); color: inherit; text-decoration: none; max-width: 240px; min-width: 0; }
.h-step:hover { border-color: var(--mk-accent-line); }
.h-step > span { display: grid; min-width: 0; }
.h-step b { font-size: 13.5px; display: block; }
.h-step small { font-size: 12px; color: var(--mk-muted); line-height: 1.45; display: block; }
.h-step--ext { border-style: dashed; display: grid; }
@media (max-width: 640px) {
  .h-chain { flex-direction: column; }
  .h-chain li { flex-direction: column; align-items: stretch; }
  .h-chain li + li::before { content: "↓"; padding: 2px 0 2px 16px; align-self: flex-start; }
  .h-step { max-width: none; }
}

.h-contact { padding: 18px; display: grid; gap: 8px; }
.h-contact p { margin: 0; color: var(--mk-text-2); font-size: 14.5px; line-height: 1.75; }

/* 商品帮助页 */
.h-crumb { display: flex; flex-wrap: wrap; gap: 6px; font-size: 13px; color: var(--mk-muted); margin-bottom: 6px; }
.h-crumb a { color: var(--mk-text-2); text-decoration: none; }
.h-crumb a:hover { color: var(--mk-accent-ink); }
.h-preview { margin: 0 0 8px; padding: 10px 14px; border-radius: var(--mk-r-md); background: var(--mk-warn-soft); color: var(--mk-warn); font-size: 14px; font-weight: 600; }
.h-phead { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 16px; align-items: center; margin-bottom: 18px; }
.h-ptitle { display: grid; gap: 6px; min-width: 0; }
.h-ptitle .mk-lede { font-size: 16px; }
.h-tags { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.h-buy { white-space: nowrap; }
@media (max-width: 640px) { .h-phead { grid-template-columns: auto minmax(0, 1fr); } .h-buy { grid-column: 1 / -1; justify-self: start; } }

.h-grid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 32px; align-items: start; }
@media (max-width: 900px) { .h-grid { grid-template-columns: 1fr; } .h-side { order: -1; } .h-side .h-toc:not(:first-child) { display: none; } }
.h-main { display: grid; gap: 16px; min-width: 0; }
.h-box { padding: 16px 18px; display: grid; gap: 8px; }
.h-box-t { margin: 0; font-size: 15px; font-weight: 800; }
.h-box .fine { margin: 0; }
.h-fields { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.h-fields li { display: grid; gap: 2px; padding: 8px 12px; border-radius: var(--mk-r-md); background: var(--mk-surface-2); }
.h-fields b { font-size: 14px; }
.h-fields span { font-size: 12.5px; color: var(--mk-muted); }
.h-quick { border-color: var(--mk-accent-line); background: linear-gradient(180deg, var(--mk-accent-soft), transparent 70%), var(--mk-surface); }
.h-quick ol, .h-quick ul { margin: 0; padding-left: 22px; display: grid; gap: 4px; }
.h-quick li { font-size: 15px; line-height: 1.7; color: var(--mk-text-2); }

.h-body { font-size: 15.5px; line-height: 1.8; color: var(--mk-text-2); }
.h-body h2 { margin: 28px 0 8px; font-size: 21px; font-weight: 800; color: var(--mk-text); letter-spacing: -.01em; scroll-margin-top: 84px; }
.h-body h3 { margin: 20px 0 6px; font-size: 16px; font-weight: 700; color: var(--mk-text); }
.h-body p, .h-body ul, .h-body ol { margin: 8px 0; }
.h-body ul, .h-body ol { padding-left: 22px; }
.h-body li { margin: 4px 0; }
.h-body b { color: var(--mk-text); }
.h-body a { color: var(--mk-accent-ink); }
.h-body code { font-family: var(--mk-mono); font-size: .88em; background: var(--mk-surface-2); padding: 1px 6px; border-radius: 6px; }
.h-body blockquote { margin: 0 0 12px; padding: 14px 16px; border-radius: var(--mk-r-md); background: var(--mk-accent-soft); color: var(--mk-text); font-size: 15px; }
.h-body img { max-width: 100%; height: auto; border-radius: var(--mk-r-md); border: 1px solid var(--mk-border); }

.h-plan { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-left: 2px solid var(--mk-border); }
.h-plan li { position: relative; padding: 6px 0 10px 18px; display: grid; gap: 2px; }
.h-plan li::before { content: ""; position: absolute; left: -6px; top: 12px; width: 10px; height: 10px; border-radius: 50%; background: var(--mk-accent); }
.h-plan span { font-size: 12.5px; color: var(--mk-muted); font-variant-numeric: tabular-nums; }
.h-plan b { font-size: 14.5px; }

.h-side { position: sticky; top: 84px; display: grid; gap: 12px; }
.h-toc { display: grid; gap: 2px; padding: 14px 16px; border-radius: var(--mk-r-lg); border: 1px solid var(--mk-border); background: var(--mk-surface); font-size: 13.5px; }
.h-toc b { font-size: 12px; color: var(--mk-muted); letter-spacing: .04em; margin-bottom: 4px; }
.h-toc a { color: var(--mk-text-2); text-decoration: none; padding: 4px 0; }
.h-toc a:hover { color: var(--mk-accent-ink); }
.h-toc span { color: var(--mk-text-2); line-height: 1.7; }
.h-toc span + span { margin-top: 6px; font-size: 12.5px; color: var(--mk-muted); }

.h-more { display: flex; flex-wrap: wrap; gap: 8px 16px; padding-top: 18px; margin-top: 18px; border-top: 1px solid var(--mk-border); font-size: 14px; }
.h-more b { width: 100%; font-size: 13px; color: var(--mk-muted); }
.h-more a { color: var(--mk-accent-ink); text-decoration: none; }
.h-body.guide { padding: 0; }
@media (max-width: 900px) { .h-side { position: static; } }