/* 帮助中心(/help):和首页同一套颜色 / 字体(变量抄自首页 index.html,改了两边一起改) */
:root {
  --paper: #fbfcfe; --soft: #f2f5fa; --panel: #ffffff; --canvas: #eef2f8;
  --ink: #0d1424; --ink2: #3a4458; --muted: #6a7487; --line: #e2e7f0; --line2: #cfd7e5;
  --accent: #1d4ed8; --accent-soft: #e9efff; --ring: rgba(29, 78, 216, .16); --mark: #dbe6ff;
  --btn-bg: #1d4ed8; --btn-bg-hover: #1a44c0; --btn-ink: #ffffff; --btn-shadow: rgba(29, 78, 216, .55);
  --hl: #e8590c; --hl-soft: rgba(232, 89, 12, .12);
  --shadow-1: 0 1px 2px rgba(13, 20, 36, .05), 0 6px 20px rgba(13, 20, 36, .06);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0b0f17; --soft: #111723; --panel: #151c2a; --canvas: #0f1521;
    --ink: #e8ecf4; --ink2: #c0c8d7; --muted: #8a94a8; --line: #222b3b; --line2: #2e394e;
    --accent: #7ea4ff; --accent-soft: #18264a; --ring: rgba(126, 164, 255, .22); --mark: #20335f;
    --btn-bg: #3567ea; --btn-bg-hover: #3f72f5; --btn-ink: #ffffff; --btn-shadow: rgba(53, 103, 234, .5);
    --hl: #ff8c42; --hl-soft: rgba(255, 140, 66, .16);
    --shadow-1: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0b0f17; --soft: #111723; --panel: #151c2a; --canvas: #0f1521;
  --ink: #e8ecf4; --ink2: #c0c8d7; --muted: #8a94a8; --line: #222b3b; --line2: #2e394e;
  --accent: #7ea4ff; --accent-soft: #18264a; --ring: rgba(126, 164, 255, .22); --mark: #20335f;
  --btn-bg: #3567ea; --btn-bg-hover: #3f72f5; --btn-ink: #ffffff; --btn-shadow: rgba(53, 103, 234, .5);
  --hl: #ff8c42; --hl-soft: rgba(255, 140, 66, .16);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
  color-scheme: dark;
}
* { box-sizing: border-box; }
::placeholder { color: var(--muted); opacity: 1; }   /* 浏览器默认的 #757575 在深色底上只有 3.7:1 */
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.7 var(--font-sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; letter-spacing: -.02em; text-wrap: balance; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.i { width: 18px; height: 18px; flex: none; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.wrap { max-width: 1120px; margin-inline: auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 40px; padding: 0 18px; border-radius: 11px; font-weight: 600; font-size: 14.5px; border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
.btn-primary { background: var(--btn-bg); color: var(--btn-ink); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .16), 0 8px 20px -10px var(--btn-shadow); }
.btn-primary:hover { background: var(--btn-bg-hover); }
.btn-ghost { background: var(--panel); border-color: var(--line2); color: var(--ink); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-sm { height: 36px; padding: 0 14px; font-size: 14px; border-radius: 10px; }

/* 顶栏(同首页) */
.nav { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--paper) 86%, transparent); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; white-space: nowrap; }
.brand svg { width: 28px; height: 28px; flex: none; }
.nav-links { display: flex; gap: 2px; }
.nav-links a { padding: 7px 12px; border-radius: 8px; color: var(--ink2); font-size: 14px; }
.nav-links a:hover, .nav-links a.on { background: var(--soft); color: var(--ink); }
.nav-cta { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.nav-cta[hidden] { display: none; }
.who { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13.5px; max-width: 220px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.who .i { width: 16px; height: 16px; }
.who-btn { height: 34px; padding: 0 10px; border: 1px solid transparent; border-radius: 9px; background: transparent; cursor: pointer; font: inherit; }
.who-btn:hover, .who-btn[aria-expanded="true"] { background: var(--soft, rgba(127, 127, 127, .1)); color: var(--ink, inherit); }
.who-btn { gap: 8px; padding: 0 8px 0 4px; color: var(--ink, inherit); font-weight: 550; }
.who-btn .xna-av2 { width: 28px; height: 28px; }
.who-btn .dn { width: 14px; height: 14px; color: var(--muted); }
/* 「小诺云文档」入口:比普通按钮醒目一点(浅主题色底 + 主题色字 + 小图标),和首页一样 */
.btn-doc { background: var(--accent-soft, rgba(29, 78, 216, .1)); border-color: color-mix(in srgb, var(--accent, #1d4ed8) 28%, transparent); color: var(--accent, #1d4ed8); }
.btn-doc:hover { border-color: var(--accent, #1d4ed8); }
.btn-doc .i { width: 17px; height: 17px; }
@media (max-width: 640px) { .nav-links { display: none; } .who { display: none; } .who-btn { display: inline-flex; } .who-btn .nm, .who-btn .dn { display: none; } .who-btn { padding: 0 4px; } }
@media (max-width: 420px) { .btn-doc .t { display: none; } .btn-doc { padding: 0 10px; } }

/* 顶部:标题、搜索、分页 */
.hero { padding: 40px 0 0; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, var(--soft), var(--paper)); }
.hero h1 { font-size: clamp(28px, 4vw, 38px); }
.hero .lead { color: var(--ink2); margin-top: 8px; max-width: 680px; }
.search { margin-top: 20px; display: flex; align-items: center; gap: 8px; max-width: 560px; height: 46px; padding: 0 14px; border: 1px solid var(--line2); border-radius: 12px; background: var(--panel); box-shadow: var(--shadow-1); }
.search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.search .i { color: var(--muted); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font: inherit; font-size: 15px; }
.search input::-webkit-search-cancel-button { display: none; }
.search button { border: 0; background: transparent; cursor: pointer; color: var(--muted); display: inline-flex; padding: 4px; }
.search button[hidden] { display: none; }
.tabs { display: flex; gap: 4px; margin-top: 22px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a { padding: 10px 16px; border-bottom: 2px solid transparent; color: var(--muted); font-weight: 600; white-space: nowrap; }
.tabs a:hover { color: var(--ink); }
.tabs a.on { color: var(--accent); border-bottom-color: var(--accent); }

/* 正文:左边目录 + 右边内容 */
.body { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; padding-top: 28px; padding-bottom: 72px; }
.loading { color: var(--muted); }
.toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow: auto; font-size: 14px; }
.toc a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--ink2); line-height: 1.45; }
.toc a:hover { background: var(--soft); }
.toc a.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.body.no-toc { grid-template-columns: minmax(0, 1fr); }
@media (max-width: 860px) { .body { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 16px; } .toc { display: none; } }
.pane[hidden] { display: none; }
.sec { padding: 22px 0 30px; border-bottom: 1px solid var(--line); }
.sec:last-child { border-bottom: 0; }
.sec h2 { font-size: 21px; display: flex; align-items: center; gap: 10px; }
.sec h2 a.anchor { opacity: 0; color: var(--muted); font-weight: 400; font-size: 16px; }
.sec h2:hover a.anchor { opacity: 1; }
.sec h3 { font-size: 16px; margin-top: 18px; }
.sec p, .sec ul, .sec ol { margin: 12px 0 0; color: var(--ink2); }
.sec ul, .sec ol { padding-left: 22px; }
.sec li { margin: 5px 0; }
.sec li::marker { color: var(--muted); }
.sec ol > li::marker { color: var(--accent); font-weight: 700; }
.sec strong { color: var(--ink); }
.sec code { font-family: var(--font-mono); font-size: .9em; background: var(--soft); padding: 1px 5px; border-radius: 5px; }
.sec a.link { color: var(--accent); }
.sec a.link:hover { text-decoration: underline; }
.pane.features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-content: start; }
.pane.features[hidden] { display: none; }
.pane.features .sec { border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px 20px; background: var(--panel); }
.pane.features .sec h2 { font-size: 17px; }
@media (max-width: 760px) { .pane.features { grid-template-columns: minmax(0, 1fr); } }
.empty { color: var(--muted); padding: 30px 0; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 1px; }

/* 带标注的截图:截图上叠编号框 + 箭头(位置是百分比,随图缩放) */
.shot { margin: 18px 0 0; }
.shot .si { position: relative; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-1); background: var(--soft); }
.shot img { display: block; width: 100%; height: auto; }
.shot .mk { position: absolute; border: 2.5px solid var(--hl); border-radius: 8px; background: var(--hl-soft); box-shadow: 0 0 0 3px rgba(255, 255, 255, .55); pointer-events: none; }
.shot .mk b { position: absolute; top: -12px; left: -12px; min-width: 24px; height: 24px; padding: 0 6px; border-radius: 12px; background: var(--hl); color: #fff; font: 700 13px/24px var(--font-sans); text-align: center; box-shadow: 0 2px 6px rgba(0, 0, 0, .25); }
.shot .mk b.r { left: auto; right: -12px; }
.shot .mk b.d { top: auto; bottom: -12px; }
.shot .ar { position: absolute; width: 56px; height: 56px; color: var(--hl); pointer-events: none; filter: drop-shadow(0 1px 1px rgba(255, 255, 255, .8)); }
.shot figcaption, .ill figcaption { margin-top: 8px; font-size: 13px; color: var(--muted); }
.shot figcaption ol { margin: 4px 0 0; padding-left: 20px; }

/* 系统界面示意图 */
.ill { margin: 16px 0 0; }
.ill .iw { display: flex; justify-content: center; padding: 18px; border: 1px dashed var(--line2); border-radius: 12px; background: var(--soft); }
.ill svg { width: 100%; max-width: 420px; height: auto; }

/* 价目表 */
.price { margin-top: 14px; }
.price table { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.price th, .price td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.price th { background: var(--soft); color: var(--muted); font-weight: 600; font-size: 13px; white-space: nowrap; }
.price tr:last-child td { border-bottom: 0; }
.price td.n { font-variant-numeric: tabular-nums; white-space: nowrap; }
.price td small { display: block; color: var(--muted); font-size: 12px; }
.price .scroll { overflow-x: auto; border-radius: 12px; }
.price .note { margin-top: 8px; font-size: 13px; color: var(--muted); }
.price a { color: var(--accent); }
.price .tag { display: inline-block; font-size: 11.5px; padding: 0 6px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); margin-left: 6px; }
.price .err { color: var(--muted); font-size: 13.5px; }
.price input.flt { margin: 0 0 10px; width: 100%; max-width: 320px; height: 36px; padding: 0 12px; border: 1px solid var(--line2); border-radius: 9px; background: var(--panel); color: var(--ink); font: inherit; font-size: 14px; }
@media (max-width: 640px) { .price th, .price td { padding: 8px 9px; } }

.foot { border-top: 1px solid var(--line); padding: 24px 0 calc(24px + env(safe-area-inset-bottom, 0px)); color: var(--muted); font-size: 13px; }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }
.foot nav { display: flex; gap: 16px; flex-wrap: wrap; }
.foot a:hover { color: var(--ink); }