/* =========================================================
   MQL5 中文参考 · 清爽科技蓝（浅色主题）
   珍珠白/浅灰蓝 底 + 科技蓝主色；代码块保留深色高对比
   ========================================================= */
:root {
  --bg0: #f3f7fc;              /* 页面底 */
  --bg1: #f7fafd;
  --bg2: #ffffff;              /* 卡片/面板 */
  --panel: #ffffff;
  --panel2: #eef4fb;
  --line: rgba(27, 84, 150, 0.12);
  --line2: rgba(27, 84, 150, 0.26);

  --txt: #23344b;
  --txt-2: #5a6f8a;
  --txt-3: #8ba0ba;

  --brand: #1a6bd6;            /* 科技蓝主色 */
  --brand-deep: #0d4fb3;
  --brand-soft: rgba(26, 107, 214, 0.10);

  --up: #128fa8;               /* 强调青(激活/高亮用，清新不抢眼) */
  --cyan: #0f9bd8;
  --gold: #d99a24;
  --down: #d64550;

  --link: #0b63d4;
  --link-hover: #0a4a9e;
  --head-accent: #1a6bd6;

  --code-bg: #0b101c;          /* 深色代码块 */

  --serif-fb: Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Microsoft YaHei UI", sans-serif;
  --disp: "Bahnschrift", "Arial Narrow", "Segoe UI", "PingFang SC", sans-serif;
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;

  --r-sm: 6px;
  --r-md: 10px;
  --shadow-1: 0 1px 2px rgba(15, 55, 100, 0.06);
  --shadow-2: 0 16px 44px -18px rgba(20, 66, 120, 0.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background:
    linear-gradient(180deg, #eef4fb 0, rgba(238, 244, 251, 0) 300px),
    var(--bg1);
  color: var(--txt);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(26, 107, 214, 0.22); color: #06233f; }

a { color: var(--link); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--link-hover); }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #c4d5e8; border-radius: 8px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: #a7bfd9; background-clip: content-box; }
::-webkit-scrollbar-track { background: transparent; }

.skip-link {
  position: fixed; left: 12px; top: -60px; z-index: 200;
  background: var(--brand); color: #fff; padding: 8px 16px; border-radius: 8px; font-weight: 600;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; color: #fff; }

/* ---------- 布局 ---------- */
.app { display: grid; grid-template-columns: 320px minmax(0, 1fr); min-height: 100vh; }
.main { min-width: 0; display: flex; flex-direction: column; }
.main > main { flex: 1 0 auto; }

/* ---------- 侧边栏 ---------- */
.sidebar {
  position: sticky; top: 0; height: 100vh; z-index: 60;
  display: flex; flex-direction: column;
  background: #fbfdff;
  border-right: 1px solid var(--line);
}
.sb-head { padding: 16px 18px 12px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 11px; color: var(--txt); }
.brand:hover { color: var(--txt); }
.brand-logo { width: 34px; height: 34px; flex: none; }
.brand-logo .c0 { fill: #8fb7e8; }
.brand-logo .c1 { fill: var(--brand); }
.brand-logo .c2 { fill: var(--gold); }
.brand-text { display: flex; flex-direction: column; line-height: 1.12; }
.brand-text b { font-family: var(--disp); font-weight: 700; font-size: 21px; letter-spacing: 2px; color: var(--brand-deep); }
.brand-text b i { color: var(--brand); font-style: normal; }
.brand-text i { font-style: normal; color: var(--txt-2); font-size: 11px; letter-spacing: 3px; margin-top: 3px; }

.sb-search { position: relative; margin: 12px 14px 6px; }
.sb-search .icon {
  position: absolute; left: 11px; top: 50%; width: 15px; height: 15px;
  transform: translateY(-50%); fill: var(--txt-3); pointer-events: none;
}
.sb-search input {
  width: 100%; background: #fff; border: 1px solid var(--line2);
  color: var(--txt); border-radius: 8px; padding: 8px 34px 8px 32px; outline: none;
  font: 500 13.5px var(--sans); box-shadow: var(--shadow-1);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.sb-search input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.sb-search input::placeholder { color: var(--txt-3); }
.sb-search .kbd {
  position: absolute; right: 9px; top: 50%; transform: translateY(-50%);
  font: 11px var(--mono); color: var(--txt-3); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px; background: #fff;
}

.sb-scroll { flex: 1 1 auto; overflow-y: auto; padding: 6px 10px 20px; }
.sb-foot { padding: 12px 18px 18px; border-top: 1px solid var(--line); display: flex; gap: 18px; }
.sb-foot a { color: var(--txt-2); font-size: 13px; }
.sb-foot a:hover { color: var(--brand); }

/* 目录树 */
.toc { list-style: none; margin: 0; padding: 0; }
.toc .toc { padding-left: 14px; border-left: 1px solid var(--line); margin-left: 9px; }
.toc li { margin: 1px 0; }
.toc a {
  display: flex; gap: 8px; align-items: baseline;
  color: var(--txt-2); padding: 5px 9px; border-radius: 7px;
  font-size: 13.5px; line-height: 1.5; border-left: 2px solid transparent;
}
.toc a:hover { color: var(--brand-deep); background: rgba(26, 107, 214, 0.05); }
.toc a.is-page {
  color: var(--brand-deep); font-weight: 600;
  background: linear-gradient(90deg, rgba(26,107,214,0.12), rgba(26,107,214,0.02));
  border-left-color: var(--brand);
}
.toc a.is-page:hover { color: var(--brand-deep); }
.toc a .ic { font-family: var(--mono); font-size: 11px; opacity: 0.7; color: var(--txt-3); flex: none; transform: translateY(1px); }

.toc summary {
  cursor: pointer; list-style: none; user-select: none;
  color: var(--txt-2); padding: 5px 9px; border-radius: 7px; font-size: 13.5px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
}
.toc summary::-webkit-details-marker { display: none; }
.toc summary::before {
  content: ""; width: 0; height: 0; flex: none;
  border-top: 5px solid transparent; border-bottom: 5px solid transparent;
  border-left: 6px solid var(--txt-3);
  transition: transform 0.15s;
}
.toc details[open] > summary::before { transform: rotate(90deg); }
.toc summary:hover { color: var(--brand-deep); background: rgba(26, 107, 214, 0.05); }
.toc summary.is-open { color: var(--brand); }
.toc details[open] > summary { color: var(--txt); }
.toc .cnt {
  margin-left: auto; font: 10px var(--mono); color: var(--txt-3);
  border: 1px solid var(--line); border-radius: 20px; padding: 0 6px; flex: none;
}

/* 搜索结果面板 */
.search-hint { padding: 10px 12px; color: var(--txt-3); font-size: 12px; }
.search-item { display: block; padding: 7px 10px; border-radius: 8px; margin-bottom: 3px; }
.search-item b { color: var(--brand); }
.search-item small { display: block; color: var(--txt-3); font-size: 11.5px; margin-top: 1px; }
.search-item:hover { background: rgba(26, 107, 214, 0.06); }

/* 遮罩 */
.backdrop { position: fixed; inset: 0; background: rgba(18, 38, 62, 0.35); z-index: 55; backdrop-filter: blur(2px); }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 12px;
  padding: 10px clamp(14px, 3vw, 34px);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.icon-btn {
  width: 34px; height: 34px; flex: none; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; color: var(--txt-2);
  border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow-1);
  transition: all 0.15s;
}
.icon-btn:hover { color: var(--brand); border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px var(--brand-soft); }
.icon-btn .icon { width: 17px; height: 17px; fill: currentColor; }
#btnTree { display: none; }

.crumbs { flex: 1; min-width: 0; }
.crumbs ol { list-style: none; display: flex; align-items: center; margin: 0; padding: 0; gap: 4px; overflow: hidden; white-space: nowrap; }
.crumbs li { font-size: 13px; color: var(--txt-3); flex: none; }
.crumbs li::after { content: "/"; margin-left: 6px; color: var(--txt-3); opacity: 0.5; }
.crumbs li:last-child::after { display: none; }
.crumbs a { color: var(--txt-2); }
.crumbs a:hover { color: var(--brand); }
.crumbs .crumb-here { color: var(--brand-deep); max-width: 46vw; overflow: hidden; text-overflow: ellipsis; }
.top-actions { display: flex; gap: 8px; flex: none; }

/* ---------- 文章 ---------- */
.article {
  width: min(100% - clamp(28px, 7vw, 110px), 920px);
  margin: 0 auto; padding: 46px 0 56px;
}
.article > * { min-width: 0; }

h1, h2, h3, h4, h5 { font-family: var(--disp); color: #123a63; line-height: 1.35; scroll-margin-top: 84px; }
h1 {
  font-size: clamp(27px, 4vw, 38px); font-weight: 800; letter-spacing: 0.3px;
  margin: 6px 0 14px; position: relative; padding-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
h1::before {
  content: ""; width: 6px; height: 34px; border-radius: 4px; flex: none;
  background: linear-gradient(180deg, var(--brand), rgba(26, 107, 214, 0.15));
  box-shadow: 0 0 0 1px rgba(26, 107, 214, 0.12);
}
h1::after { content: ""; position: absolute; left: 18px; right: 0; bottom: 0; height: 1px; background: linear-gradient(90deg, var(--line2), transparent); }

h2 { font-size: clamp(21px, 2.6vw, 26px); margin: 42px 0 14px; padding-left: 13px; border-left: 4px solid var(--brand); letter-spacing: 0.3px; }
h3 { font-size: 19px; margin: 30px 0 10px; color: #1c4d80; }
h4, h5 { font-size: 16.5px; margin: 24px 0 8px; color: #245a92; }

p { margin: 14px 0; }
.article li { margin: 6px 0; }
ul, ol { padding-left: 26px; }
.article > ul, .article > ol { margin: 12px 0; }

strong, b { color: #123a63; font-weight: 650; }
em { color: #b26a00; }

img { max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 1px 6px rgba(20, 66, 120, 0.10); }
figure { margin: 18px 0; }
.img-caption { text-align: center; color: var(--txt-3); font-size: 13px; margin: 6px 0 20px; }
.see-also { color: var(--txt-2); border-left: 3px solid var(--line2); padding-left: 12px; }

.anchor { display: block; position: relative; top: -96px; visibility: hidden; height: 0; width: 0; }

/* ---------- 代码块（深色保留） ---------- */
.codeblock {
  margin: 20px 0; border-radius: var(--r-md); overflow: hidden;
  border: 1px solid rgba(40, 90, 170, 0.25);
  background: linear-gradient(180deg, #0d1424, var(--code-bg));
  box-shadow: 0 14px 34px -22px rgba(15, 55, 100, 0.5), inset 0 0 0 1px rgba(255,255,255,0.03);
}
.cb-head {
  display: flex; align-items: center; gap: 6px; padding: 8px 12px;
  background: linear-gradient(90deg, #0f1830, #12203e); border-bottom: 1px solid rgba(110, 160, 235, 0.18);
}
.cb-light { width: 10px; height: 10px; border-radius: 50%; background: #243149; }
.cb-light:nth-child(1) { background: #ff5f56; }
.cb-light:nth-child(2) { background: #ffbd2e; }
.cb-light:nth-child(3) { background: #27c93f; }
.cb-lang {
  margin-left: 10px; font: 700 11px var(--mono); letter-spacing: 1px;
  color: #4be0b4; background: rgba(75, 224, 180, 0.10); border: 1px solid rgba(75, 224, 180, 0.32);
  padding: 2px 8px; border-radius: 20px;
}
.cb-copy {
  margin-left: auto; background: rgba(255,255,255,0.06); color: #b7c7e2;
  border: 1px solid rgba(150,190,240,0.28); border-radius: 6px; padding: 3px 11px;
  font: 500 12px var(--sans); cursor: pointer; transition: all 0.15s;
}
.cb-copy:hover { color: #fff; border-color: #4be0b4; background: rgba(75,224,180,0.14); }
.cb-copy.done { color: #4be0b4; border-color: #4be0b4; }

.code {
  margin: 0; padding: 15px 17px; overflow-x: auto;
  font: 400 13.2px/1.65 var(--mono); color: #d7e0f0;
  tab-size: 4;
}
.code code { font: inherit; color: inherit; white-space: pre; }

.t-kw { color: #8ab9ff; font-weight: 500; }
.t-fn { color: #cfa8ff; }
.t-cm { color: #5b6d89; font-style: italic; }
.t-pa { color: #ffbe7d; font-style: italic; }
.t-st { color: #83e5a9; }

/* ---------- 表格 ---------- */
.doc-table {
  width: 100%; margin: 20px 0; border-collapse: collapse; font-size: 14px;
  border: 1px solid var(--line2); border-radius: var(--r-sm); overflow: hidden;
  background: #fff; box-shadow: var(--shadow-1);
  display: table; border-spacing: 0;
}
.doc-table th {
  text-align: left; background: linear-gradient(180deg, #e7f0fb, #ddeaf8);
  color: #0d3d6d; font-weight: 650; padding: 10px 13px;
  border-bottom: 1px solid var(--line2);
  font-family: var(--disp); letter-spacing: 0.2px;
}
.doc-table td { padding: 9px 13px; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--txt); }
.doc-table tr:last-child td { border-bottom: none; }
.doc-table tbody tr:nth-child(even) { background: #f8fbfe; }
.doc-table tbody tr:hover { background: #eef6ff; }
.doc-table td { font-size: 13.5px; }
.doc-table p { margin: 4px 0; }
.doc-table a { color: var(--link); }
.doc-table-plain { border: 1px solid var(--line); }
.doc-table-plain td, .doc-table-plain th { border-bottom: 1px solid var(--line); }

/* ---------- 前后页 ---------- */
.pager {
  width: min(100% - clamp(28px, 7vw, 110px), 920px); margin: 4px auto 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 8px 0 30px;
}
.pager-cell {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); box-shadow: var(--shadow-1);
  transition: all 0.18s; min-width: 0;
}
.pager-cell:hover { border-color: var(--brand); transform: translateY(-1px); box-shadow: 0 10px 26px -16px rgba(26,107,214,0.35); }
.pager-cell.next { justify-content: flex-end; text-align: right; flex-direction: row-reverse; }
.pager-arrow { color: var(--brand); font-size: 20px; line-height: 1; flex: none; }
.pager-label { display: block; font-size: 12px; color: var(--txt-3); margin-bottom: 3px; }
.pager-title {
  display: block; font-size: 14.5px; color: #123a63; font-weight: 550;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pager-cell:hover .pager-title { color: var(--brand-deep); }
.pager-cell.is-empty { border-style: dashed; background: transparent; opacity: 0; pointer-events: none; }

/* ---------- 页脚 ---------- */
.site-foot { border-top: 1px solid var(--line); background: #eef4fb; }
.foot-inner { width: min(100% - 48px, 900px); margin: 0 auto; padding: 22px 0 26px; }
.foot-inner p { margin: 6px 0; color: var(--txt-2); font-size: 13px; }
.foot-dim { color: var(--txt-3) !important; font-size: 12px !important; }

/* ---------- 首页模块 ---------- */
.home-stats {
  display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px;
  margin: 24px 0 6px;
}
.stat {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); padding: 14px 8px;
  text-align: center; position: relative; overflow: hidden; box-shadow: var(--shadow-1);
}
.stat::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: linear-gradient(90deg, transparent, var(--brand), transparent); opacity: 0.9; }
.stat b { display: block; font: 700 22px var(--disp); color: var(--brand); letter-spacing: 1px; }
.stat span { font-size: 12px; color: var(--txt-3); }

.home-guide { margin-top: 42px; }
.guide-sub { color: var(--txt-2); margin: -4px 0 20px; font-size: 14.5px; }
.gcard-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(255px, 1fr)); gap: 12px;
  counter-reset: g;
}
.gcard {
  position: relative; display: flex; align-items: center; gap: 13px;
  padding: 15px 16px; border-radius: var(--r-md);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-1);
  transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
  overflow: hidden;
}
.gcard::after {
  content: ""; position: absolute; inset: auto -30% -80% auto; width: 90%; height: 120%;
  background: radial-gradient(circle, rgba(26, 107, 214, 0.10), transparent 62%);
  opacity: 0; transition: opacity 0.2s;
}
.gcard:hover { transform: translateY(-2px); border-color: var(--brand); box-shadow: var(--shadow-2); }
.gcard:hover::after { opacity: 1; }
.gcard-no {
  font: 600 13px var(--mono); color: var(--gold); opacity: 0.9; flex: none;
  border: 1px solid rgba(217, 154, 36, 0.35); border-radius: 6px; padding: 1px 6px; background: #fffdf5;
}
.gcard-name { color: #123a63; font-weight: 600; font-size: 15px; flex: 1; }
.gcard-cnt { font: 500 11.5px var(--sans); color: var(--txt-3); flex: none; }

/* 提示信息用内联高亮 */
h2:first-child { margin-top: 6px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(90px);
  background: #0d3d6d; color: #fff; border: 1px solid rgba(255,255,255,0.2);
  padding: 10px 20px; border-radius: 40px; font-size: 14px; z-index: 300;
  box-shadow: 0 10px 40px rgba(15, 55, 100, 0.3); transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.3, 1.2);
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 1060px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; width: min(320px, 86vw);
    transform: translateX(-104%); transition: transform 0.26s ease;
    box-shadow: 0 8px 40px rgba(15, 55, 100, 0.25);
  }
  .sidebar.open { transform: translateX(0); }
  .sb-foot { padding-bottom: max(18px, env(safe-area-inset-bottom)); }
  #btnTree { display: inline-flex; }
}

@media (max-width: 680px) {
  body { font-size: 15.5px; }
  .article { width: calc(100% - 40px); padding-top: 30px; }
  .crumbs li:not(:last-child) { display: none; }
  .crumbs .crumb-here { max-width: 62vw; }
  .pager { grid-template-columns: 1fr; width: calc(100% - 40px); }
  .pager-cell.next { grid-row: auto; }
  .home-stats { grid-template-columns: repeat(2, 1fr); }
  .gcard-grid { grid-template-columns: 1fr; }
  .sb-search .kbd { display: none; }
}

@media print {
  .sidebar, .topbar, .pager, .site-foot, .cb-copy { display: none !important; }
  body { background: #fff; color: #111; }
  .app { display: block; }
  .codeblock, pre, code { background: #f5f5f5 !important; color: #111 !important; border: 1px solid #ddd; }
  .code, .t-kw, .t-fn, .t-cm, .t-pa, .t-st { color: #111 !important; }
  .code .t-kw { color: #0000d0 !important; }
  .code .t-fn { color: #7a00c9 !important; }
  .code .t-cm { color: #008000 !important; }
  .code .t-pa { color: #8a5a00 !important; }
  .code .t-st { color: #006767 !important; }
  a { color: #0645ad !important; }
  h1, h2, h3, h4 { color: #000 !important; break-after: avoid-page; }
  h1::before { background: #000; }
  .doc-table { border-color: #999; }
}

/* ---------- 搜索：加载/空态/结果列表 ---------- */
.search-state {
  padding: 12px 12px; color: var(--txt-2); font-size: 12.5px; line-height: 1.7;
}
.search-state b { color: var(--brand-deep); }
.search-state code {
  font: 500 12px var(--mono); color: var(--brand-deep);
  background: var(--brand-soft); border-radius: 4px; padding: 1px 5px;
}
.search-count {
  padding: 8px 12px 4px; color: var(--txt-3); font-size: 12px;
  border-bottom: 1px dashed var(--line); margin-bottom: 6px;
}
.search-count b { color: var(--brand); font-weight: 700; }
.search-item {
  position: relative; display: block; padding: 7px 10px; margin: 0 0 2px;
  border-radius: 8px; border-left: 2px solid transparent;
}
.search-item:hover { background: rgba(26, 107, 214, 0.06); }
.search-item.is-top { border-left-color: var(--brand); }
.search-item.is-active { background: var(--brand-soft); border-left-color: var(--brand); }
.si-title { display: block; font-size: 13.5px; font-weight: 600; color: var(--txt); }
.search-item:hover .si-title,
.search-item.is-active .si-title { color: var(--brand-deep); }
.si-sub {
  display: block; margin-top: 2px; font-size: 11.5px; color: var(--txt-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}