/* OpenTerminal 官网 - 企业风浅色主题
   单一强调色: 品牌绿 #1a7f37 (深化的 #3fb950, 保证浅底对比度)
   无渐变 / 无发光 / 无装饰性动画, 仅保留 hover 与 focus 反馈 */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f8f8;
  --text: #1c2128;
  --text-2: #57606a;
  --border: #d9dee3;
  --accent: #1a7f37;
  --accent-hover: #116329;
  --radius: 8px;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", -apple-system, "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.mono { font-family: var(--mono); font-size: 0.92em; }

/* ---- nav ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
  text-decoration: none;
}

.nav-links { display: flex; gap: 28px; }

.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 15px;
}

.nav-links a:hover { color: var(--text); }

/* ---- hero ---- */
.hero {
  padding: 72px 0 0;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.hero-kicker {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 36px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 650;
}

.hero-sub {
  margin-top: 20px;
  max-width: 46ch;
  color: var(--text-2);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  color: var(--text);
  border-color: var(--border);
  background: var(--bg);
}

.btn-ghost:hover { border-color: var(--text-2); }

.hero-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-2);
}

.hero-shot {
  min-width: 0;
}

.hero-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(28, 33, 40, 0.10);
}

.hero-shot figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-2);
  text-align: center;
}

.spec-strip {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  padding-top: 40px;
  padding-bottom: 40px;
  font-size: 14px;
  color: var(--text-2);
}

.spec-strip strong { color: var(--text); font-weight: 600; }

/* ---- features ---- */
.features { padding: 72px 0; }

.features h2, .download h2, .changelog h2 {
  font-size: 28px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.section-sub {
  margin-top: 10px;
  color: var(--text-2);
  max-width: 60ch;
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 48px;
}

.media-row {
  grid-template-columns: 7fr 5fr;
  align-items: center;
  gap: 56px;
}

.feature-copy h3 {
  font-size: 20px;
  font-weight: 650;
  margin-bottom: 16px;
}

.feature-copy ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.feature-copy li {
  padding-left: 18px;
  position: relative;
  color: var(--text-2);
  font-size: 15px;
}

.feature-copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 2px;
  background: var(--accent);
}

.feature-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 6px 18px rgba(28, 33, 40, 0.08);
}

/* ---- download ---- */
.download {
  padding: 72px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.dl-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 40px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14.5px;
}

.dl-table th, .dl-table td {
  text-align: left;
  padding: 14px 18px;
  vertical-align: top;
}

.dl-table thead th {
  background: var(--bg-soft);
  color: var(--text-2);
  font-weight: 600;
  font-size: 13px;
}

.dl-table tbody tr + tr td { border-top: 1px solid var(--border); }

.dl-table a { color: var(--accent); text-decoration: none; font-weight: 600; }
.dl-table a:hover { text-decoration: underline; }

.dl-table .sep { color: var(--border); margin: 0 8px; }

.update-note { margin-top: 40px; max-width: 72ch; }

.update-note h3 { font-size: 16px; margin-bottom: 8px; }

.update-note p { color: var(--text-2); font-size: 14.5px; }

/* ---- changelog ---- */
.changelog { padding: 72px 0; }

.changelog-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 40px;
}

.changelog-list article h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
}

.changelog-list article h3 .mono {
  color: var(--text);
  margin-right: 8px;
}

.changelog-list ul {
  list-style: none;
  display: grid;
  gap: 8px;
}

.changelog-list li {
  font-size: 14px;
  color: var(--text-2);
}

.changelog-more {
  margin-top: 40px;
  font-size: 14px;
  color: var(--text-2);
}

.changelog-more a { color: var(--accent); }

/* ---- footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  font-size: 13.5px;
  color: var(--text-2);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---- responsive ---- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: 48px; }
  .feature-row, .media-row { grid-template-columns: 1fr; gap: 32px; }
  .media-row .feature-shot { order: -1; }
  .changelog-list { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 14px; }
  .hero h1 { font-size: 30px; }
  .dl-table { display: block; overflow-x: auto; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}