/* 帮助页样式：独立文档页，和登录页共用基础变量。 */

body.help {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.help-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.help-brand strong {
  display: block;
  font-size: 15px;
}

.help-brand em {
  display: block;
  font-style: normal;
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.help-nav {
  display: flex;
  gap: 16px;
  font-size: 13px;
}

.help-nav a {
  color: var(--muted);
  text-decoration: none;
}

.help-nav a:hover {
  color: var(--accent);
}

.help-main {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 56px) clamp(16px, 4vw, 24px) 64px;
}

.help-main h1 {
  margin: 0 0 8px;
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: -0.01em;
}

.help-sub {
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.help-main section {
  margin-bottom: 34px;
}

.help-main h2 {
  margin: 0 0 14px;
  font-size: 18px;
}

.help-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.help-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.help-card h3 {
  margin: 0 0 6px;
  font-size: 14.5px;
}

.help-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.help-steps,
.help-list {
  margin: 0;
  padding-left: 22px;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--text);
}

.help-faq {
  display: grid;
  gap: 8px;
}

.help-faq details {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  background: #fff;
}

.help-faq summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.help-faq p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.help-lang {
  margin: 36px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.help-lang a {
  color: inherit;
}

.help-lang a[aria-current="true"] {
  color: var(--accent);
  font-weight: 600;
}

.help-footer {
  border-top: 1px solid var(--line);
  padding: 20px clamp(16px, 4vw, 40px) 28px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

.help-footer p {
  margin: 4px 0;
}

.help-footer a {
  color: inherit;
  margin: 0 6px;
  text-decoration: none;
}

.help-footer a:hover {
  text-decoration: underline;
}