/* 使用手册：浅色阅读版式，配色取自产品「晴空」主题，与手册截图一致。 */
:root {
  --dc-bg: #FFFFFF; --dc-side: #F4F8FC; --dc-soft: #EFF4F9; --dc-hover: #E8F0F8;
  --dc-ink: #1B2530; --dc-sub: #5C6B7A; --dc-muted: #8C9AA9;
  --dc-line: #DFE7EF; --dc-line-2: #EAF0F6;
  --dc-accent: #0D94E8; --dc-accent-ink: #0A6FB0; --dc-accent-soft: #E2F3FD; --dc-accent-line: #BCE2F9;
  --dc-amber: #AC7E23; --dc-amber-soft: #F5EEDA; --dc-amber-line: #EBDFBC;
  --dc-red: #D2493A; --dc-red-soft: #FBE9E6; --dc-red-line: #F4D6D0;
  --dc-green: #4E7D5B; --dc-green-soft: #E3EEE6;
  --dc-code: #EDF3F9; --dc-code-ink: #33586F;
  --dc-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --dc-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --dc-header: 60px;
}
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--dc-header) + 20px); }
body { margin: 0; background: var(--dc-bg); color: var(--dc-ink); font: 16px/1.8 var(--dc-sans); -webkit-font-smoothing: antialiased; }
a { color: var(--dc-accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--dc-accent); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }
.dc-skip { position: fixed; top: -60px; left: 16px; z-index: 50; padding: 8px 16px; border-radius: 8px; background: var(--dc-accent); color: #fff; }
.dc-skip:focus { top: 10px; }

/* 页头 */
.dc-header { position: sticky; top: 0; z-index: 20; height: var(--dc-header); display: flex; align-items: center; gap: 20px; padding: 0 24px; background: rgba(255, 255, 255, .92); border-bottom: 1px solid var(--dc-line); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.dc-brand { display: inline-flex; align-items: center; gap: 9px; color: var(--dc-ink); font-weight: 650; font-size: 17px; white-space: nowrap; }
.dc-brand:hover { text-decoration: none; }
.dc-brand img { border-radius: 6px; }
.dc-brand em { font-style: normal; font-weight: 500; font-size: 14px; color: var(--dc-sub); padding-left: 10px; border-left: 1px solid var(--dc-line); }
.dc-search { position: relative; flex: 0 1 320px; margin-left: auto; }
.dc-search input { width: 100%; height: 36px; padding: 0 34px 0 12px; border: 1px solid var(--dc-line); border-radius: 8px; background: var(--dc-side); color: var(--dc-ink); font: inherit; font-size: 14px; }
.dc-search input:focus { outline: none; border-color: var(--dc-accent); background: #fff; box-shadow: 0 0 0 3px var(--dc-accent-soft); }
.dc-search kbd { position: absolute; right: 9px; top: 8px; min-width: 20px; height: 20px; border: 1px solid var(--dc-line); border-radius: 5px; font: 12px/18px var(--dc-mono); text-align: center; color: var(--dc-muted); background: #fff; pointer-events: none; }
.dc-search input:focus ~ kbd, .dc-search input:not(:placeholder-shown) ~ kbd { display: none; }
.dc-results { position: absolute; top: 42px; left: 0; right: 0; max-height: min(70vh, 520px); overflow: auto; padding: 6px; background: #fff; border: 1px solid var(--dc-line); border-radius: 10px; box-shadow: 0 16px 40px -12px rgba(27, 37, 48, .25); }
.dc-results a { display: block; padding: 8px 10px; border-radius: 7px; color: var(--dc-ink); line-height: 1.5; }
.dc-results a:hover, .dc-results a.on { background: var(--dc-accent-soft); text-decoration: none; }
.dc-results strong { display: block; font-size: 14px; }
.dc-results span { display: block; font-size: 12.5px; color: var(--dc-sub); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dc-results mark { background: none; color: var(--dc-accent-ink); font-weight: 600; }
.dc-results p { margin: 0; padding: 10px; font-size: 13px; color: var(--dc-sub); }
.dc-header-links { display: flex; align-items: center; gap: 18px; font-size: 14px; white-space: nowrap; }
.dc-header-links a { color: var(--dc-sub); }
.dc-header-links a:hover { color: var(--dc-ink); text-decoration: none; }
.dc-header-links .dc-download { padding: 6px 14px; border-radius: 8px; background: var(--dc-accent); color: #fff; font-weight: 550; }
.dc-header-links .dc-download:hover { color: #fff; filter: brightness(1.05); }
.dc-menu { display: none; width: 36px; height: 36px; padding: 0; border: 1px solid var(--dc-line); border-radius: 8px; background: #fff; cursor: pointer; }
.dc-menu span, .dc-menu span::before, .dc-menu span::after { display: block; width: 16px; height: 1.5px; margin: 0 auto; background: var(--dc-ink); border-radius: 1px; position: relative; content: ""; }
.dc-menu span::before { position: absolute; top: -5px; }
.dc-menu span::after { position: absolute; top: 5px; }

/* 三栏布局 */
.dc-layout { display: grid; grid-template-columns: 264px minmax(0, 1fr); min-height: calc(100vh - var(--dc-header)); }
.dc-sidebar { position: sticky; top: var(--dc-header); height: calc(100vh - var(--dc-header)); overflow-y: auto; padding: 24px 14px 40px; background: var(--dc-side); border-right: 1px solid var(--dc-line-2); }
.dc-nav-group + .dc-nav-group { margin-top: 22px; }
.dc-nav-title { margin: 0 0 6px; padding: 0 10px; font-size: 12.5px; font-weight: 650; letter-spacing: .04em; color: var(--dc-muted); }
.dc-nav-link { display: block; padding: 6px 10px; border-radius: 7px; color: var(--dc-sub); font-size: 14.5px; line-height: 1.5; }
.dc-nav-link:hover { background: var(--dc-hover); color: var(--dc-ink); text-decoration: none; }
.dc-nav-link.on { background: var(--dc-accent-soft); color: var(--dc-accent-ink); font-weight: 600; }
.dc-main { display: grid; grid-template-columns: minmax(0, 820px) 200px; gap: 48px; justify-content: center; padding: 40px 40px 80px; }
.dc-article { min-width: 0; }
.dc-toc { position: sticky; top: calc(var(--dc-header) + 40px); align-self: start; display: flex; flex-direction: column; gap: 2px; font-size: 13.5px; line-height: 1.5; }
.dc-toc-title { margin: 0 0 8px; font-weight: 650; color: var(--dc-ink); }
.dc-toc a { padding: 4px 0 4px 12px; border-left: 2px solid var(--dc-line); color: var(--dc-sub); }
.dc-toc a:hover { color: var(--dc-ink); text-decoration: none; }
.dc-toc a.on { border-left-color: var(--dc-accent); color: var(--dc-accent-ink); }

/* 正文 */
.dc-kicker { margin: 0 0 6px; font-size: 13.5px; font-weight: 600; color: var(--dc-accent-ink); }
.dc-titlebar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.dc-titlebar h1 { margin: 0; font-size: 32px; line-height: 1.3; letter-spacing: -.01em; }
.dc-demo { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border: 1px solid var(--dc-accent-line); border-radius: 8px; background: var(--dc-accent-soft); color: var(--dc-accent-ink); font-size: 14px; font-weight: 550; white-space: nowrap; }
.dc-demo::after { content: "↗"; font-size: 13px; }
.dc-demo:hover { border-color: var(--dc-accent); text-decoration: none; }
.dc-lead { margin: 14px 0 0; font-size: 18px; line-height: 1.7; color: var(--dc-sub); }
.dc-body { margin-top: 28px; }
.dc-body > :first-child { margin-top: 0; }
.dc-body h2 { margin: 48px 0 14px; padding-top: 22px; border-top: 1px solid var(--dc-line-2); font-size: 23px; line-height: 1.4; }
.dc-body h3 { margin: 30px 0 10px; font-size: 18px; line-height: 1.5; }
.dc-body h2, .dc-body h3 { position: relative; }
.dc-anchor { position: absolute; left: -22px; padding-right: 6px; color: var(--dc-muted); font-weight: 400; opacity: 0; }
.dc-body h2:hover .dc-anchor, .dc-body h3:hover .dc-anchor { opacity: 1; text-decoration: none; }
.dc-body p, .dc-body ul, .dc-body ol, .dc-body table, .dc-body pre { margin: 0 0 16px; }
.dc-body ul { padding-left: 22px; }
.dc-body li + li { margin-top: 4px; }
.dc-body strong { font-weight: 650; }
.dc-body code { padding: 1px 6px; border-radius: 5px; background: var(--dc-code); color: var(--dc-code-ink); font: .88em var(--dc-mono); }
.dc-body pre { padding: 14px 16px; overflow-x: auto; border-radius: 10px; background: var(--dc-code); font-size: 14px; line-height: 1.6; }
.dc-body pre code { padding: 0; background: none; }
.dc-body table { width: 100%; border-collapse: collapse; font-size: 15px; display: block; overflow-x: auto; }
.dc-body th, .dc-body td { padding: 9px 12px; border: 1px solid var(--dc-line); text-align: left; vertical-align: top; }
.dc-body th { background: var(--dc-side); font-weight: 600; white-space: nowrap; }
.dc-body blockquote { margin: 0 0 16px; padding: 2px 16px; border-left: 3px solid var(--dc-line); color: var(--dc-sub); }

/* 步骤：编号圆点 + 每步截图 */
.dc-body ol { list-style: none; counter-reset: dc-step; padding-left: 0; }
.dc-body ol > li { counter-increment: dc-step; position: relative; padding: 0 0 8px 46px; }
.dc-body ol > li + li { margin-top: 18px; }
.dc-body ol > li::before { content: counter(dc-step); position: absolute; left: 0; top: 1px; width: 30px; height: 30px; border-radius: 50%; background: var(--dc-accent); color: #fff; font-size: 15px; font-weight: 650; line-height: 30px; text-align: center; }
.dc-body ol > li:not(:last-child)::after { content: ""; position: absolute; left: 14.5px; top: 38px; bottom: -14px; width: 1px; background: var(--dc-line); }
.dc-body ol > li > p:first-child { font-size: 16.5px; }

/* 截图：点击放大 */
.dc-shot { display: block; margin: 12px 0 18px; }
.dc-shot-zoom { display: block; width: 100%; padding: 0; border: 1px solid var(--dc-line); border-radius: 10px; overflow: hidden; background: var(--dc-soft); cursor: zoom-in; box-shadow: 0 10px 30px -18px rgba(27, 37, 48, .35); }
.dc-shot-zoom:hover { border-color: var(--dc-accent-line); }
.dc-shot img { display: block; width: 100%; height: auto; }
.dc-shot-caption { display: block; margin-top: 8px; font-size: 13.5px; color: var(--dc-sub); text-align: center; }
/* 同一段落里连续放置的截图（如手机界面）并排显示，窄屏自动换行 */
.dc-body p:has(> .dc-shot + .dc-shot) { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; align-items: start; }
.dc-body p:has(> .dc-shot + .dc-shot) > .dc-shot { margin: 0; }
.dc-body p:has(> .dc-shot + .dc-shot) .dc-shot-zoom { margin: 0 auto; }
.dc-lightbox { width: min(96vw, 1600px); max-width: none; max-height: 94vh; padding: 0; border: 0; border-radius: 12px; background: transparent; overflow: visible; }
.dc-lightbox::backdrop { background: rgba(15, 22, 30, .78); }
.dc-lightbox img { display: block; width: 100%; height: auto; max-height: 94vh; object-fit: contain; border-radius: 12px; cursor: zoom-out; }
.dc-lightbox-close { position: absolute; top: -14px; right: -14px; width: 34px; height: 34px; border: 0; border-radius: 50%; background: #fff; color: var(--dc-ink); font-size: 22px; line-height: 1; cursor: pointer; box-shadow: 0 6px 20px rgba(0, 0, 0, .3); }

/* 提示框 */
.dc-callout { margin: 0 0 18px; padding: 12px 16px; border: 1px solid var(--dc-accent-line); border-radius: 10px; background: var(--dc-accent-soft); }
.dc-callout p { margin: 0; }
.dc-callout p + p { margin-top: 6px; }
.dc-callout-title { display: block; margin-bottom: 2px; font-size: 14px; color: var(--dc-accent-ink); }
.dc-callout-warning { border-color: var(--dc-amber-line); background: var(--dc-amber-soft); }
.dc-callout-warning .dc-callout-title { color: var(--dc-amber); }
.dc-callout-note { border-color: var(--dc-line); background: var(--dc-side); }
.dc-callout-note .dc-callout-title { color: var(--dc-sub); }

/* 首页卡片 */
.dc-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin: 0 0 20px; }
.dc-cards a { display: block; padding: 16px 18px; border: 1px solid var(--dc-line); border-radius: 12px; color: var(--dc-ink); background: #fff; }
.dc-cards a:hover { border-color: var(--dc-accent-line); background: var(--dc-accent-soft); text-decoration: none; }
.dc-cards strong { display: block; margin-bottom: 4px; font-size: 16px; }
.dc-cards span { display: block; font-size: 14px; line-height: 1.6; color: var(--dc-sub); }

/* 翻页与页脚 */
.dc-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 56px; }
.dc-pager a { display: block; padding: 14px 18px; border: 1px solid var(--dc-line); border-radius: 10px; color: var(--dc-ink); font-weight: 600; }
.dc-pager a:hover { border-color: var(--dc-accent-line); text-decoration: none; }
.dc-pager span { display: block; font-size: 13px; font-weight: 400; color: var(--dc-sub); }
.dc-pager-next { grid-column: 2; text-align: right; }
.dc-footer { display: flex; justify-content: space-between; gap: 20px; padding: 22px 40px 30px 304px; border-top: 1px solid var(--dc-line-2); font-size: 13px; color: var(--dc-muted); }

@media (max-width: 1180px) {
  .dc-main { grid-template-columns: minmax(0, 820px); }
  .dc-toc { display: none; }
}
@media (max-width: 860px) {
  .dc-header { gap: 10px; padding: 0 14px; }
  .dc-menu { display: block; }
  .dc-brand em, .dc-header-links a:not(.dc-download) { display: none; }
  .dc-search kbd { display: none; }
  .dc-layout { grid-template-columns: minmax(0, 1fr); }
  .dc-sidebar { position: fixed; z-index: 15; top: var(--dc-header); left: 0; width: min(300px, 86vw); transform: translateX(-100%); transition: transform 200ms ease; box-shadow: 0 0 40px rgba(0, 0, 0, .15); }
  .dc-page.nav-open .dc-sidebar { transform: none; }
  .dc-main { padding: 24px 18px 60px; }
  .dc-titlebar h1 { font-size: 26px; }
  .dc-lead { font-size: 16.5px; }
  .dc-body ol > li { padding-left: 40px; }
  .dc-footer { flex-direction: column; padding: 20px 18px 28px; }
}
@media (prefers-reduced-motion: reduce) { .dc-sidebar { transition: none; } }