/* ===== Trading Desk Dark Theme — Set 2 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0D1117;
  --panel: #161B22;
  --panel-border: #30363D;
  --text: #E6EDF3;
  --text-muted: #8B949E;
  --up: #3FB950;
  --down: #F85149;
  --amber: #D29922;
  --nav-h: 56px;
  --font-title: "DIN Alternate", "Roboto Condensed", "Microsoft YaHei", sans-serif;
  --font-mono: "Consolas", "Courier New", monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}

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

.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ===== Keyframes (required) ===== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== Navigation ===== */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(13, 17, 23, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--panel-border);
  z-index: 1000;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

.nav-brand svg { flex-shrink: 0; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 2px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-left: 3px solid transparent;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(22, 27, 34, 0.6);
}

.nav-links a.active {
  color: var(--text);
  border-left-color: var(--amber);
  background: rgba(210, 153, 34, 0.08);
}

.nav-links a.nav-dl {
  border-left-color: var(--up);
  color: var(--up);
  background: rgba(63, 185, 80, 0.08);
}

.nav-links a.nav-dl:hover { color: var(--text); background: rgba(63, 185, 80, 0.15); }

/* ===== Hero — Market Wall ===== */
.hero {
  position: relative;
  min-height: 520px;
  margin-top: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--panel-border);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg svg { width: 100%; height: 100%; display: block; }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13,17,23,0.55) 0%, rgba(13,17,23,0.92) 70%, var(--bg) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 20px 80px;
  max-width: 820px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--up);
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.3);
  padding: 4px 12px;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-family: var(--font-title);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 28px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-ticker-bar {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.hero-ticker-bar span.up { color: var(--up); }
.hero-ticker-bar span.down { color: var(--down); }
.hero-ticker-bar span.neutral { color: var(--text-muted); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.9rem;
  font-family: inherit;
  border: 1px solid var(--panel-border);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  border-radius: 0;
}

.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn-primary {
  background: var(--up);
  border-color: var(--up);
  color: #0D1117;
  font-weight: 600;
}

.btn-primary:hover { background: #46c35a; border-color: #46c35a; color: #0D1117; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--panel-border);
}

.btn-secondary:hover { border-color: var(--amber); color: var(--amber); }

.btn-amber {
  background: rgba(210, 153, 34, 0.15);
  border-color: var(--amber);
  color: var(--amber);
}

.btn-amber:hover { background: rgba(210, 153, 34, 0.25); }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ===== Sections ===== */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--panel-border);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-title);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.section-desc {
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 36px;
  font-size: 0.925rem;
}

/* ===== Terminal Panel List ===== */
.terminal-list {
  border: 1px solid var(--panel-border);
  background: var(--panel);
}

.terminal-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--panel-border);
  align-items: start;
}

.terminal-item:last-child { border-bottom: none; }

.terminal-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(63, 185, 80, 0.08);
  border: 1px solid rgba(63, 185, 80, 0.2);
  color: var(--up);
}

.terminal-icon svg { width: 20px; height: 20px; }

.terminal-item h3 {
  font-family: var(--font-title);
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--text);
}

.terminal-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.terminal-item .term-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--amber);
  margin-bottom: 4px;
  display: block;
}

/* ===== Feature Timeline ===== */
.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 2px solid var(--panel-border);
}

.timeline-step {
  position: relative;
  padding: 0 0 40px 24px;
}

.timeline-step:last-child { padding-bottom: 0; }

.timeline-step::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 4px;
  width: 10px;
  height: 10px;
  background: var(--up);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--up);
}

.timeline-step h3 {
  font-family: var(--font-title);
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--amber);
}

.timeline-step p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.timeline-step .step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--panel-border);
  border: 1px solid var(--panel-border);
}

.stat-cell {
  background: var(--panel);
  padding: 28px 20px;
  text-align: center;
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--up);
  line-height: 1.2;
}

.stat-num .unit { font-size: 0.9rem; color: var(--amber); }

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ===== Platform Download Bar ===== */
.platform-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--panel-border);
  border: 1px solid var(--panel-border);
}

.platform-cell {
  background: var(--panel);
  padding: 24px 16px;
  text-align: center;
}

.platform-cell svg {
  width: 32px;
  height: 32px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.platform-cell h3 {
  font-family: var(--font-title);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.platform-cell p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.platform-cell .btn {
  width: 100%;
  justify-content: center;
  padding: 8px 12px;
  font-size: 0.8rem;
}

/* ===== Comparison Table ===== */
.data-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--panel-border);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--panel-border);
}

.data-table th {
  background: var(--panel);
  font-family: var(--font-title);
  font-weight: 600;
  color: var(--amber);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.data-table td { background: rgba(22, 27, 34, 0.5); }

.data-table tr:last-child td { border-bottom: none; }

.data-table .mono { font-family: var(--font-mono); }
.data-table .yes { color: var(--up); }
.data-table .no { color: var(--down); }

/* ===== Reviews — Compact List ===== */
.review-list {
  border: 1px solid var(--panel-border);
}

.review-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--panel-border);
  background: var(--panel);
  align-items: start;
}

.review-item:last-child { border-bottom: none; }

.review-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.review-meta .rating { color: var(--amber); display: block; margin-bottom: 4px; }

.review-body {
  font-size: 0.875rem;
  color: var(--text);
  line-height: 1.6;
}

.review-body cite {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== FAQ — Q|A Two Column ===== */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--panel-border);
  border: 1px solid var(--panel-border);
}

.faq-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  background: var(--panel);
}

.faq-q {
  padding: 18px 20px;
  font-family: var(--font-title);
  font-size: 0.9rem;
  color: var(--amber);
  border-right: 1px solid var(--panel-border);
  background: rgba(210, 153, 34, 0.04);
}

.faq-a {
  padding: 18px 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== Footer ===== */
.site-footer {
  padding: 40px 0 32px;
  background: var(--panel);
  border-top: 1px solid var(--panel-border);
}

.footer-inner { text-align: center; }

.footer-safe {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--up);
  margin-bottom: 16px;
  padding: 8px 16px;
  border: 1px solid rgba(63, 185, 80, 0.3);
  background: rgba(63, 185, 80, 0.06);
}

.footer-safe svg { width: 16px; height: 16px; flex-shrink: 0; }

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 720px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links a:hover { color: var(--up); }

/* ===== Download Page ===== */
.dl-hero {
  margin-top: var(--nav-h);
  padding: 56px 0 48px;
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  text-align: center;
}

.dl-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin-bottom: 12px;
}

.dl-hero p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 24px;
  font-size: 0.925rem;
}

.dl-version {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 12px;
}

.dl-win-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--panel-border);
  border: 1px solid var(--up);
  margin-bottom: 32px;
}

.dl-win-left {
  background: var(--panel);
  padding: 32px;
}

.dl-win-left h2 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--up);
}

.dl-win-left ul {
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.dl-win-left li {
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
}

.dl-win-left li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--up);
  font-family: var(--font-mono);
}

.dl-win-right {
  background: rgba(63, 185, 80, 0.06);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.dl-win-right .big-ver {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  color: var(--up);
  font-weight: 700;
}

.dl-win-right .file-size {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 8px 0 20px;
}

.dl-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--panel-border);
  border: 1px solid var(--panel-border);
}

.dl-card {
  background: var(--panel);
  padding: 24px 20px;
}

.dl-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.dl-card-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--panel-border);
  color: var(--amber);
}

.dl-card-icon svg { width: 20px; height: 20px; }

.dl-card h3 {
  font-family: var(--font-title);
  font-size: 0.95rem;
}

.dl-card .sys-req {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.dl-card p {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ===== Steps ===== */
.steps-list {
  counter-reset: step;
  list-style: none;
  border: 1px solid var(--panel-border);
}

.steps-list li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--panel-border);
  background: var(--panel);
  align-items: start;
}

.steps-list li:last-child { border-bottom: none; }

.steps-list li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--amber);
  font-weight: 700;
}

.steps-list li h4 {
  font-family: var(--font-title);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.steps-list li p {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.two-col-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* ===== Changelog ===== */
.changelog {
  border: 1px solid var(--panel-border);
}

.changelog-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--panel-border);
  background: var(--panel);
}

.changelog-item:last-child { border-bottom: none; }

.changelog-ver {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--up);
}

.changelog-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

.changelog-body {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.changelog-body ul {
  list-style: none;
  margin-top: 4px;
}

.changelog-body li {
  padding: 2px 0;
  padding-left: 12px;
  position: relative;
}

.changelog-body li::before {
  content: "-";
  position: absolute;
  left: 0;
  color: var(--amber);
}

/* ===== Sys Requirements ===== */
.sys-req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--panel-border);
  border: 1px solid var(--panel-border);
}

.sys-req-block {
  background: var(--panel);
  padding: 24px;
}

.sys-req-block h3 {
  font-family: var(--font-title);
  font-size: 0.95rem;
  color: var(--amber);
  margin-bottom: 12px;
}

.sys-req-block table {
  width: 100%;
  font-size: 0.825rem;
}

.sys-req-block td {
  padding: 6px 0;
  color: var(--text-muted);
  vertical-align: top;
}

.sys-req-block td:first-child {
  color: var(--text);
  width: 110px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* ===== Security Block ===== */
.security-block {
  border: 1px solid rgba(63, 185, 80, 0.3);
  background: rgba(63, 185, 80, 0.04);
  padding: 24px;
}

.security-block h3 {
  font-family: var(--font-title);
  color: var(--up);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.security-block p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== zh-cn Article Page ===== */
.article-wrap {
  margin-top: var(--nav-h);
  padding: 48px 0 64px;
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--panel-border);
}

.article-header h1 {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 12px;
  line-height: 1.35;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.article-body {
  max-width: 780px;
}

.article-body h2 {
  font-family: var(--font-title);
  font-size: 1.15rem;
  color: var(--amber);
  margin: 32px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--amber);
}

.article-body p {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
  text-align: justify;
}

.article-body strong { color: var(--text); }

.article-cta {
  margin-top: 40px;
  padding: 32px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  text-align: center;
}

.article-cta p {
  text-align: center;
  margin-bottom: 16px;
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-bar { grid-template-columns: repeat(2, 1fr); }
  .dl-cards { grid-template-columns: 1fr; }
  .dl-win-featured { grid-template-columns: 1fr; }
  .two-col-steps { grid-template-columns: 1fr; }
  .sys-req-grid { grid-template-columns: 1fr; }
  .faq-row { grid-template-columns: 1fr; }
  .faq-q { border-right: none; border-bottom: 1px solid var(--panel-border); }
  .review-item { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(13, 17, 23, 0.97);
    border-bottom: 1px solid var(--panel-border);
    padding: 8px 0;
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    width: 100%;
    padding: 12px 20px;
  }

  .hero { min-height: 460px; }
  .hero-ticker-bar { gap: 12px; }
  .terminal-item { grid-template-columns: 1fr; }
  .terminal-icon { display: none; }
  .platform-bar { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .changelog-item { grid-template-columns: 1fr; }
}