/* 帮助文档、隐私政策、开源许可共用的文档页样式 */
.dc { max-width: 880px; margin: 0 auto; padding: 136px 32px 96px; }
.dc-head { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }
.dc-title { margin: 0; font-family: var(--font-display); font-size: 48px; font-weight: 700; line-height: 1.15; letter-spacing: -.01em; }
.dc-lead { margin: 0; max-width: 36em; font-size: 16px; color: var(--text-secondary); }
.dc-sec { padding: 28px 0; border-top: 1px solid var(--border); }
.dc-sec h2 { margin: 0 0 14px; font-family: var(--font-display); font-size: 22px; font-weight: 600; line-height: 1.3; }
.dc-sec p, .dc-sec li, .dc-sec dd { font-size: 15px; line-height: 1.75; color: var(--text-secondary); }
.dc-sec p { margin: 0 0 10px; max-width: 46em; }
.dc-sec ol, .dc-sec ul { margin: 0 0 10px; padding-left: 22px; max-width: 46em; }
.dc-sec li { margin: 4px 0; }
.dc-sec b { color: var(--text-primary); font-weight: 600; }
.dc-sec a { color: var(--link); text-decoration: none; border-bottom: 1px solid transparent; }
.dc-sec a:hover { border-bottom-color: currentColor; }
.dc-keys { margin: 0 0 10px; display: grid; gap: 0; }
.dc-keys > div { display: grid; grid-template-columns: 160px 1fr; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.dc-keys > div:last-child { border-bottom: 0; }
.dc-keys dt { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.dc-keys dd { margin: 0; }
.dc-q { border-bottom: 1px solid var(--border); }
.dc-q summary { cursor: pointer; list-style: none; padding: 14px 0; font-size: 15px; font-weight: 600; color: var(--text-primary); display: flex; justify-content: space-between; gap: 16px; }
.dc-q summary::-webkit-details-marker { display: none; }
.dc-q summary::after { content: "+"; color: var(--text-tertiary); font-weight: 400; }
.dc-q[open] summary::after { content: "−"; }
.dc-q > div { padding: 0 0 14px; font-size: 15px; line-height: 1.75; color: var(--text-secondary); max-width: 46em; }
.dc-lic { list-style: none; padding: 0; }
.dc-lic li { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--border); margin: 0; }
.dc-lic li > div { display: flex; flex-direction: column; gap: 2px; }
.dc-lic em { font-style: normal; font-family: var(--font-mono); font-size: 13px; color: var(--text-tertiary); white-space: nowrap; }
@media (max-width: 640px) {
  .dc { padding: 112px 20px 72px; }
  .dc-title { font-size: 34px; }
  .dc-keys > div { grid-template-columns: 1fr; gap: 2px; }
  .dc-lic li { flex-direction: column; gap: 4px; }
}

/* 支持页与反馈页 */
.dc-support { display: grid; grid-template-columns: 240px 1fr; gap: 40px; align-items: start; }
.dc-qr { margin: 0; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.dc-qr-frame { width: 100%; padding: 8px; box-sizing: border-box; border: 1px solid var(--border); border-radius: 10px; background: var(--input); box-shadow: var(--shadow-button); }
.dc-qr-frame img { display: block; width: 100%; height: auto; border-radius: 6px; }
.dc-qr figcaption { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.dc-support-text h2:not(:first-child) { margin-top: 24px; }
.dc-form { display: grid; gap: 20px; max-width: 640px; }
.dc-field { display: flex; flex-direction: column; gap: 8px; }
.dc-field .tf-tabs-seg { align-self: flex-start; }
.dc-textarea { height: auto; padding: 10px var(--space-md); line-height: 1.6; resize: vertical; min-height: 160px; }
.dc-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.dc-status { font-size: 14px; color: var(--text-secondary); }
.dc-status.is-ok { color: var(--success-text, var(--text-primary)); }
.dc-status.is-error { color: var(--danger-text); }
.dc-note { margin: 0; font-size: 13px; line-height: 1.7; color: var(--text-tertiary); }
.dc-note a { color: var(--link); text-decoration: none; }
@media (max-width: 640px) {
  .dc-support { grid-template-columns: 1fr; gap: 28px; }
  .dc-qr { max-width: 240px; margin: 0 auto; }
}