/* 产品曝光实战手册 · 网页版样式（无外部依赖） */

:root {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --surface-2: #faf8f4;
  --text: #1f2328;
  --muted: #5b616b;
  --border: #e3ded3;
  --accent: #c2410c;
  --accent-strong: #d9480f;
  --accent-soft: #fff1e6;
  --accent-line: #f5c7a9;
  --ok: #1a7f37;
  --code-bg: #f1eee8;
  --mark: #ffe08a;
  --shadow: 0 1px 2px rgba(31, 35, 40, .06), 0 8px 24px rgba(31, 35, 40, .08);
  --topbar-h: 56px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16171a;
    --surface: #1d1f23;
    --surface-2: #202328;
    --text: #e7e7e4;
    --muted: #a3a8ae;
    --border: #2e3137;
    --accent: #ff9a62;
    --accent-strong: #ff8a4c;
    --accent-soft: #33231a;
    --accent-line: #6b3a1f;
    --ok: #4ac26b;
    --code-bg: #25282d;
    --mark: #7a5b00;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #16171a;
  --surface: #1d1f23;
  --surface-2: #202328;
  --text: #e7e7e4;
  --muted: #a3a8ae;
  --border: #2e3137;
  --accent: #ff9a62;
  --accent-strong: #ff8a4c;
  --accent-soft: #33231a;
  --accent-line: #6b3a1f;
  --ok: #4ac26b;
  --code-bg: #25282d;
  --mark: #7a5b00;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--topbar-h) + 16px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  overflow-x: hidden;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-strong); }

.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--surface); padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky; top: 0; z-index: 30;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 12px;
  padding: 0 16px;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; white-space: nowrap; }
.brand:hover { color: var(--text); }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--accent-strong); color: #fff; font-size: 16px;
}

.icon-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; flex: none;
  border: 1px solid transparent; border-radius: 10px;
  background: transparent; color: var(--text); cursor: pointer;
}
.icon-btn:hover { background: var(--surface); border-color: var(--border); }
.menu-btn { display: none; }

.search { position: relative; margin-left: auto; flex: 0 1 380px; min-width: 0; }
.search input {
  width: 100%; height: 38px;
  padding: 0 36px 0 34px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text);
  font: inherit; font-size: 15px;
}
.search input:focus { outline: 2px solid var(--accent-line); border-color: var(--accent); }
.search-icon { position: absolute; left: 11px; top: 11px; color: var(--muted); pointer-events: none; }
.search-kbd {
  position: absolute; right: 9px; top: 9px;
  padding: 0 6px; border: 1px solid var(--border); border-radius: 5px;
  font: 12px/18px var(--mono); color: var(--muted); background: var(--surface-2);
}
.search input:focus + .search-kbd { display: none; }

.search-results {
  position: absolute; right: 0; top: 46px;
  width: min(600px, calc(100vw - 32px));
  max-height: min(70vh, 640px); overflow: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); padding: 6px;
}
.sr { display: block; padding: 10px 12px; border-radius: 8px; color: var(--text); text-decoration: none; }
.sr:hover, .sr.active { background: var(--accent-soft); color: var(--text); }
.sr-title { font-weight: 600; font-size: 15px; line-height: 1.5; }
.sr-title small { color: var(--muted); font-weight: 400; }
.sr-snip { color: var(--muted); font-size: 13.5px; line-height: 1.6; margin-top: 2px; overflow-wrap: anywhere; }
.sr-empty { padding: 14px 12px; color: var(--muted); font-size: 14px; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 1px; }

/* ---------- 布局 ---------- */

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  max-width: 1480px; margin: 0 auto;
}
@media (min-width: 1280px) {
  .layout { grid-template-columns: 280px minmax(0, 1fr) 240px; }
}

.sidebar {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto; overscroll-behavior: contain;
  padding: 20px 12px 32px 16px;
  border-right: 1px solid var(--border);
}
.nav-sec + .nav-sec { margin-top: 18px; }
.nav-title { font-size: 12.5px; font-weight: 700; letter-spacing: .06em; color: var(--muted); padding: 0 10px 4px; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 8px;
  color: var(--text); text-decoration: none; font-size: 14.5px; line-height: 1.5;
}
.sidebar a:hover { background: var(--surface); }
.sidebar a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; box-shadow: inset 3px 0 0 var(--accent-strong); }
.sidebar a span { flex: 1; min-width: 0; }
.badge { font-style: normal; font-size: 11.5px; line-height: 18px; padding: 0 7px; border-radius: 99px; background: var(--code-bg); color: var(--muted); display: none; }
.badge.show { display: inline-block; }
.badge.done { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.sidebar-foot { font-size: 12.5px; color: var(--muted); padding: 16px 10px 0; margin: 0; line-height: 1.6; }

.scrim { display: none; }

.content { min-width: 0; padding: 32px 48px 64px; }
.prose { max-width: 780px; margin: 0 auto; }
.pager, .foot, .progress { max-width: 780px; margin-left: auto; margin-right: auto; }

.toc {
  display: none;
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h)); overflow-y: auto;
  padding: 28px 16px 32px 8px;
  font-size: 13.5px; line-height: 1.5;
}
@media (min-width: 1280px) { .toc { display: block; } }
.toc-title { font-weight: 700; color: var(--muted); font-size: 12.5px; letter-spacing: .06em; margin-bottom: 8px; padding-left: 10px; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a { display: block; padding: 4px 10px; color: var(--muted); text-decoration: none; margin-left: -1px; border-left: 2px solid transparent; }
.toc a:hover { color: var(--text); }
.toc a.active { color: var(--accent); border-left-color: var(--accent-strong); }

/* ---------- 正文排版 ---------- */

.prose > :first-child { margin-top: 0; }
.prose h1 { font-size: 32px; line-height: 1.35; margin: 0 0 20px; letter-spacing: -.01em; }
.prose h2 { font-size: 24px; line-height: 1.4; margin: 48px 0 14px; padding-top: 20px; border-top: 1px solid var(--border); }
.prose h1 + h2, .prose hr + h2 { border-top: 0; padding-top: 0; }
.prose h3 { font-size: 19px; line-height: 1.5; margin: 32px 0 10px; }
.prose h4 { font-size: 17px; margin: 24px 0 8px; }
.prose p { margin: 12px 0; }
.prose ul, .prose ol { padding-left: 1.5em; margin: 10px 0; }
.prose li { margin: 4px 0; }
.prose li > p { margin: 4px 0; }
.prose strong { font-weight: 700; }
.prose hr { border: 0; border-top: 1px dashed var(--border); margin: 40px 0; }
.prose img { max-width: 100%; }

.prose h2, .prose h3, .prose h4 { position: relative; }
.h-anchor { position: absolute; left: -1.1em; width: 1em; text-align: center; color: var(--muted); text-decoration: none; opacity: 0; font-weight: 400; transition: opacity .15s; }
@media (hover: none), (max-width: 1023px) { .h-anchor { display: none; } }
h2:hover .h-anchor, h3:hover .h-anchor, h4:hover .h-anchor, .h-anchor:focus { opacity: 1; }

.prose code {
  font-family: var(--mono); font-size: .88em;
  background: var(--code-bg); padding: .12em .4em; border-radius: 5px;
  overflow-wrap: anywhere;
}

.code { position: relative; margin: 14px 0; }
.code pre, .prose pre.diagram {
  margin: 0; padding: 16px 18px;
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 12px;
  font-family: var(--mono); font-size: 14px; line-height: 1.7;
}
.code pre { white-space: pre-wrap; overflow-wrap: anywhere; padding-right: 72px; }
.code pre code, .prose pre.diagram code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; }
.prose pre.diagram { margin: 14px 0; overflow-x: auto; white-space: pre; line-height: 1.55; }
.prose pre.diagram .w { display: inline-block; width: 2ch; text-align: center; }
.copy {
  position: absolute; top: 8px; right: 8px;
  padding: 3px 10px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  font: 13px/1.6 var(--font); cursor: pointer;
}
.copy:hover { color: var(--text); border-color: var(--accent-line); }
.copy.done { color: var(--ok); }

.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.prose table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.6; }
.prose th, .prose td { padding: 9px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.prose th { background: var(--surface-2); font-weight: 700; white-space: nowrap; }
.prose tr:last-child td { border-bottom: 0; }
.prose td + td, .prose th + th { border-left: 1px solid var(--border); }

.prose blockquote { margin: 16px 0; padding: 12px 16px; border-radius: 12px; }
.prose blockquote p { margin: 4px 0; }
.prose blockquote.meta { background: var(--accent-soft); border: 1px solid var(--accent-line); font-size: 15px; }
.prose blockquote.note { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent-line); }

/* 可勾选的任务 */
.prose li.task { list-style: none; position: relative; cursor: pointer; }
.prose ul > li.task { margin-left: -1.5em; padding-left: 1.9em; }
.prose ol > li.task { list-style: decimal; }
.prose ol > li.task .task-cb { position: static; margin-right: 6px; }
.task-cb {
  position: absolute; left: 0; top: .42em;
  width: 1.1em; height: 1.1em; margin: 0;
  accent-color: var(--accent-strong); cursor: pointer;
}
.prose li.task.done { color: var(--muted); }

.progress {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-bottom: 24px; padding: 10px 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  font-size: 14px; color: var(--muted);
}
.progress-bar { flex: 1 1 160px; height: 8px; border-radius: 99px; background: var(--code-bg); overflow: hidden; }
.progress-bar span { display: block; height: 100%; width: 0; background: var(--ok); border-radius: 99px; transition: width .25s; }
.progress-text b { color: var(--text); }
.linkish { border: 0; background: none; color: var(--accent); cursor: pointer; font: inherit; padding: 0 0 0 6px; text-decoration: underline; text-underline-offset: 3px; }

/* 首页 */
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 8px; }
.btn {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px;
  border-radius: 10px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px;
}
.btn:hover { border-color: var(--accent-line); color: var(--text); }
.btn.primary { background: var(--accent-strong); border-color: var(--accent-strong); color: #fff; }
.btn.primary:hover { filter: brightness(1.06); color: #fff; }
.resume { margin: 14px 0 0; padding: 12px 16px; border-radius: 12px; background: var(--surface); border: 1px dashed var(--accent-line); font-size: 15px; }

.prose ol.loop {
  list-style: none; padding: 0; margin: 18px 0;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px;
  counter-reset: none;
}
.prose .loop li {
  margin: 0; padding: 14px 14px 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  display: grid; grid-template-columns: auto 1fr; column-gap: 10px; align-items: center; align-content: center;
}
.loop-n {
  grid-row: span 2; display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 15px;
}
.loop b { font-size: 17px; line-height: 1.3; }
.loop li span:last-child { color: var(--muted); font-size: 14px; line-height: 1.4; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 56px; }
.pager a {
  display: flex; flex-direction: column; gap: 2px;
  padding: 14px 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); text-decoration: none;
}
.pager a:hover { border-color: var(--accent-line); }
.pager small { color: var(--muted); font-size: 13px; }
.pager .next { text-align: right; }

.foot { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13.5px; }

.notfound { max-width: 780px; margin: 0 auto; padding: 64px 16px; }

/* ---------- 窄屏 ---------- */

@media (max-width: 1023px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .menu-btn { display: inline-grid; }
  .sidebar {
    position: fixed; z-index: 40; left: 0; top: var(--topbar-h);
    width: min(320px, 86vw); height: calc(100vh - var(--topbar-h));
    background: var(--bg); border-right: 1px solid var(--border);
    transform: translateX(-102%); transition: transform .2s ease;
  }
  .menu-open .sidebar { transform: none; box-shadow: var(--shadow); }
  .scrim { display: block; position: fixed; inset: var(--topbar-h) 0 0 0; z-index: 35; background: rgba(0, 0, 0, .35); }
  .scrim[hidden] { display: none; }
  .content { padding: 24px 16px 48px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .topbar { gap: 6px; padding: 0 10px; }
  .brand-text { display: none; }
  .search { flex: 1 1 auto; }
  .search-kbd { display: none; }
  .search-results { position: fixed; left: 10px; right: 10px; top: calc(var(--topbar-h) + 4px); width: auto; }
  .prose h1 { font-size: 26px; }
  .prose h2 { font-size: 21px; margin-top: 40px; }
  .prose h3 { font-size: 18px; }
  .prose table { font-size: 14px; }
  .prose th, .prose td { padding: 8px 10px; }
  .prose ol.loop { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .code pre { font-size: 13.5px; padding: 14px 14px; padding-top: 40px; }
  .prose pre.diagram { font-size: 12.5px; }
}

@media print {
  .topbar, .sidebar, .toc, .pager, .copy, .progress, .cta, .resume { display: none !important; }
  .layout { display: block; }
  .content { padding: 0; }
  body { background: #fff; color: #000; }
}