/* metatradera4.com.cn — Bloomberg / dark trading-desk chrome */
:root {
  --bg: #0b1220;
  --card: #121a2b;
  --card-2: #162033;
  --line: #243044;
  --line-strong: #31405a;
  --accent: #00c853;
  --accent-dim: #0a3d24;
  --text: #e8eef7;
  --muted: #8b9bb4;
  --warn: #ffb020;
  --danger: #ff5252;
  --danger-bg: #2a1216;
  --mono: "Cascadia Mono", "IBM Plex Mono", "Consolas", "Sarasa Gothic", "Noto Sans Mono CJK SC", monospace;
  --sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: auto; }

body {
  font-family: var(--sans);
  background:
    linear-gradient(180deg, rgba(11, 18, 32, 0.92), rgba(11, 18, 32, 0.96)),
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(36, 48, 68, 0.35) 31px 32px),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(36, 48, 68, 0.22) 47px 48px),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: #69f0ae; }
button { font-family: inherit; cursor: pointer; }
code, .mono, time, .tick, .panel-code, .fact-k, .cmp td:first-child, .nav-code {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.wrap { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }

/* —— top desk bar —— */
.desk-bar {
  background: #080e19;
  border-bottom: 1px solid var(--line-strong);
  position: sticky;
  top: 0;
  z-index: 40;
}
.desk-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  min-width: 0;
}
.brand:hover { color: #fff; }
.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  background: #0e1a14;
  border: 1px solid #1c4a32;
}
.brand-copy { line-height: 1.2; }
.brand-copy strong {
  display: block;
  font-size: 15px;
  letter-spacing: 0.04em;
  font-weight: 700;
}
.brand-copy span {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 3px;
}
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  padding: 8px 14px;
  border: 1px solid transparent;
  font-size: 14px;
  letter-spacing: 0.02em;
}
.nav a:hover {
  color: var(--text);
  border-color: var(--line);
  background: var(--card);
}
.nav a.is-current {
  color: #04140a;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}

/* —— hero —— */
.hero {
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: start;
}
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
h1 {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.lead { color: #c5d0e0; margin-bottom: 16px; font-size: 17px; }
.hero p + p { margin-top: 14px; color: var(--muted); }
.hero-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--warn);
  background: #1a160c;
  color: #e6d7a8;
  font-size: 14px;
}

.dl-stack {
  background: var(--card);
  border: 1px solid var(--line-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}
.dl-stack-hd {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: #0e1626;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.dl-stack-hd b { color: var(--accent); font-weight: 600; }
.dl-stack-bd { padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.dl-hint {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--line-strong);
  background: var(--card-2);
  color: var(--text);
  padding: 12px 16px;
  font-size: 15px;
  width: 100%;
  text-align: left;
}
.btn svg { width: 18px; height: 18px; flex: 0 0 18px; }
.btn:hover { border-color: var(--accent); color: #fff; }
.btn-win {
  background: var(--accent);
  color: #04140a;
  border-color: var(--accent);
  font-weight: 700;
  font-size: 16px;
  padding: 16px 18px;
}
.btn-win:hover { background: #00e676; color: #04140a; }
.btn-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn-ghost { background: transparent; }

/* —— feed strip —— */
.feed {
  background: #0a1422;
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.feed-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.feed-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  flex: 0 0 auto;
}
.feed-syms {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1 1 auto;
}
.feed-syms span {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text);
  border: 1px solid var(--line);
  padding: 3px 8px;
  background: var(--card);
}
.feed-note { font-size: 13px; color: var(--muted); flex: 1 1 280px; }

/* —— sections / panels —— */
.section { padding: 52px 0; }
.section + .section { border-top: 1px solid var(--line); }
.sec-hd { margin-bottom: 22px; }
.sec-hd h2 {
  font-size: clamp(22px, 2.4vw, 28px);
  margin: 6px 0 10px;
  letter-spacing: -0.015em;
}
.sec-hd p { color: var(--muted); max-width: 78ch; }
.panel-code {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
}
.panel-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 14px;
  background: #0e1626;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel-hd em {
  width: 7px;
  height: 7px;
  background: var(--accent);
  display: inline-block;
  margin-right: 8px;
  font-style: normal;
}
.panel-bd { padding: 18px 20px; }
.panel-bd p + p { margin-top: 12px; }
.panel-bd p { color: #c9d3e2; }

/* 1) horizontal capability rail */
.cap-rail {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--card);
}
.cap-item {
  padding: 18px 14px 20px;
  border-right: 1px solid var(--line);
  min-width: 0;
}
.cap-item:last-child { border-right: 0; }
.cap-item strong {
  display: block;
  font-size: 14px;
  margin: 8px 0 6px;
}
.cap-item p { font-size: 13px; color: var(--muted); line-height: 1.6; }
.cap-idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.08em;
}

/* 2) two-column chart desk */
.split-desk {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 22px;
  align-items: stretch;
}
.chart-svg {
  width: 100%;
  height: auto;
  background: #0c1524;
  border: 1px solid var(--line);
}

/* 3) definition list */
.order-dl { display: grid; gap: 0; border: 1px solid var(--line); }
.order-dl dt {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: #0e1626;
  padding: 10px 16px 4px;
  border-top: 1px solid var(--line);
}
.order-dl dt:first-child { border-top: 0; }
.order-dl dd {
  padding: 6px 16px 14px;
  color: #c9d3e2;
  background: var(--card);
}

/* 4) numbered step rail */
.step-rail { display: grid; gap: 0; border-left: 2px solid var(--accent); }
.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 8px;
  padding: 16px 0 16px 20px;
  border-bottom: 1px dashed var(--line);
}
.step:last-child { border-bottom: 0; }
.step b {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 18px;
}
.step h3 { font-size: 17px; margin-bottom: 6px; }
.step p { color: var(--muted); }

/* 5) download dock */
.dl-dock {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 16px 0;
}
.ver-box {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid #3d4a20;
  background: #161a0c;
  color: #e8e0b0;
  font-size: 14px;
}
.ver-box strong { color: #ffe082; }

/* 6) comparison matrix */
.cmp-wrap { overflow-x: auto; border: 1px solid var(--line); }
.cmp {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 14px;
}
.cmp th, .cmp td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.cmp thead th {
  background: #0e1626;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
.cmp tbody td { background: var(--card); color: #c9d3e2; }
.cmp tbody tr:nth-child(even) td { background: #101827; }
.cmp td:first-child { color: var(--text); font-weight: 600; width: 22%; }

/* 7) fact log */
.fact-log { display: grid; gap: 0; border: 1px solid var(--line); }
.fact-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.fact-row:last-child { border-bottom: 0; }
.fact-k { color: var(--accent); font-size: 12px; letter-spacing: 0.06em; }
.fact-v { color: #c9d3e2; font-size: 15px; }

/* 8) risk */
.risk {
  background: var(--danger-bg);
  border: 1px solid #6b2430;
  padding: 22px 24px;
}
.risk h2 { color: #ff8a80; margin-bottom: 10px; font-size: 22px; }
.risk p { color: #f3c7c7; }
.risk p + p { margin-top: 10px; }

/* 9) FAQ */
.faq-list { display: grid; gap: 8px; }
.faq-list details {
  background: var(--card);
  border: 1px solid var(--line);
}
.faq-list summary {
  padding: 14px 16px;
  cursor: pointer;
  font-weight: 650;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: "+";
  font-family: var(--mono);
  color: var(--accent);
  margin-right: 10px;
}
.faq-list details[open] summary::before { content: "–"; }
.faq-list details p {
  padding: 0 16px 16px 36px;
  color: var(--muted);
}

/* article (zh-cn) */
.article h2 {
  font-size: 24px;
  margin: 36px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}
.article h2:first-child { border-top: 0; margin-top: 0; }
.article h3 { font-size: 18px; margin: 22px 0 8px; color: #d5deea; }
.article p { color: #c9d3e2; margin-bottom: 14px; }
.article ul, .article ol { margin: 0 0 16px 1.3em; color: #c9d3e2; }
.article li { margin: 6px 0; }
.cta-band {
  margin: 28px 0;
  padding: 22px;
  background: var(--card);
  border: 1px solid var(--accent-dim);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
}
.cta-band p { color: var(--muted); margin: 6px 0 0; }
.cta-actions { display: flex; flex-direction: column; gap: 8px; min-width: 240px; }
.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: #0e1626;
  font-size: 14px;
}
.cta-link:hover { border-color: var(--accent); color: #fff; }

/* download page blocks */
.sys-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.sys-grid .panel-bd ul { margin-left: 1.1em; color: #c9d3e2; }
.sys-grid li { margin: 6px 0; }
.guide ol { margin-left: 1.2em; color: #c9d3e2; }
.guide li { margin: 10px 0; }
.hero-dl { padding-bottom: 40px; }

/* footer */
.site-foot {
  background: #080e19;
  border-top: 1px solid var(--line-strong);
  padding: 28px 0 36px;
  margin-top: 20px;
}
.foot-nav {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.foot-nav a { color: var(--muted); font-size: 14px; }
.foot-nav a.is-current { color: var(--accent); }
.site-foot p { color: var(--muted); font-size: 13px; margin-bottom: 10px; max-width: 90ch; }
.site-foot .copy { font-family: var(--mono); font-size: 12px; color: #6f7f96; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
  .hero-grid, .split-desk, .cta-band, .sys-grid { grid-template-columns: 1fr; }
  .cap-rail { grid-template-columns: 1fr 1fr; }
  .cap-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .dl-dock { grid-template-columns: 1fr 1fr; }
  .fact-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .desk-bar-inner { flex-direction: column; align-items: flex-start; padding: 10px 0; }
  .cap-rail, .dl-dock, .btn-row { grid-template-columns: 1fr; }
  .step { grid-template-columns: 40px 1fr; }
}