/* NexTerm 官网：全新设计，深色 / 浅色双主题。 */

:root {
  color-scheme: dark;

  --bg: #0a0d16;
  --bg-soft: #0e1220;
  --panel: #12172a;
  --panel-2: #171d33;
  --line: rgb(255 255 255 / 0.08);
  --line-strong: rgb(255 255 255 / 0.14);
  --fg: #c3c9d9;
  --fg-strong: #f2f4fa;
  --fg-soft: #8f97ac;
  --fg-faint: #626b82;
  --accent: #6e7ff2;
  --accent-2: #9a6ef2;
  --accent-fg: #ffffff;
  --green: #4ade80;
  --red: #f87171;
  --amber: #fbbf24;
  --code-bg: rgb(255 255 255 / 0.07);
  --code-fg: #93c5fd;
  --shadow: 0 30px 80px rgb(0 0 0 / 0.5);
  --radius: 14px;
  --mono: ui-monospace, "Cascadia Mono", "Cascadia Code", Consolas, "JetBrains Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;

  --bg: #f6f7fb;
  --bg-soft: #eef0f7;
  --panel: #ffffff;
  --panel-2: #f2f4fa;
  --line: rgb(16 24 40 / 0.09);
  --line-strong: rgb(16 24 40 / 0.16);
  --fg: #37415a;
  --fg-strong: #10141f;
  --fg-soft: #5b6478;
  --fg-faint: #8b93a7;
  --accent: #4f5ed7;
  --accent-2: #7a4fd7;
  --accent-fg: #ffffff;
  --green: #178a50;
  --red: #d64545;
  --amber: #b07a10;
  --code-bg: rgb(16 24 40 / 0.06);
  --code-fg: #2f3fa8;
  --shadow: 0 30px 80px rgb(16 24 40 / 0.14);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgb(110 127 242 / 0.35); color: var(--fg-strong); }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--fg-strong); }

img { max-width: 100%; display: block; }

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* 按钮：两种样式、一个尺寸体系 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--sans);
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.15s, box-shadow 0.2s, background 0.15s, border-color 0.15s;
}

.btn-lg { height: 46px; padding: 0 26px; font-size: 15px; border-radius: 12px; }

.btn-solid {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-fg);
  box-shadow: 0 8px 24px rgb(110 127 242 / 0.35);
}
.btn-solid:hover { transform: translateY(-1px); box-shadow: 0 12px 32px rgb(110 127 242 / 0.45); color: var(--accent-fg); }

.btn-outline { background: transparent; border-color: var(--line-strong); color: var(--fg); }
.btn-outline:hover { border-color: var(--accent); color: var(--fg-strong); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--fg-strong); }

.ic-sun { display: none; }
:root[data-theme="light"] .ic-sun { display: block; }
:root[data-theme="light"] .ic-moon { display: none; }

/* 顶栏 */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-inner { display: flex; align-items: center; gap: 24px; height: 62px; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-strong);
  font-weight: 700;
  font-size: 17px;
}
.brand img { width: 27px; height: 27px; border-radius: 8px; }

.nav-links { display: flex; gap: 2px; margin-left: auto; font-size: 14px; }
.nav-links a { color: var(--fg-soft); padding: 6px 13px; border-radius: 8px; transition: color 0.15s, background 0.15s; }
.nav-links a:hover { color: var(--fg-strong); background: var(--panel-2); }

.nav-actions { display: flex; gap: 10px; align-items: center; }

/* Hero */

.hero { position: relative; padding: 96px 0 80px; overflow: hidden; }

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 45% at 50% -5%, rgb(110 127 242 / 0.22), transparent 70%),
    radial-gradient(ellipse 35% 40% at 85% 30%, rgb(154 110 242 / 0.12), transparent 70%);
  pointer-events: none;
}

.hero-inner { position: relative; text-align: center; }

.pill {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
  background: rgb(110 127 242 / 0.12);
  border: 1px solid rgb(110 127 242 / 0.3);
  border-radius: 999px;
  padding: 5px 15px;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 62px);
  font-weight: 800;
  color: var(--fg-strong);
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent) 10%, var(--accent-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 17.5px;
  max-width: 620px;
  margin: 0 auto 34px;
  color: var(--fg-soft);
}

.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 22px; }

.hero-meta { font-family: var(--mono); font-size: 12.5px; color: var(--fg-faint); margin-bottom: 56px; }

/* 浏览器窗口框 */

.browser-frame {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.hero-shot { max-width: 980px; margin: 0 auto; }

.browser-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}

.b-dot { width: 11px; height: 11px; border-radius: 50%; }
.b-dot.r { background: var(--red); }
.b-dot.y { background: var(--amber); }
.b-dot.g { background: var(--green); }

.browser-title {
  margin-left: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-faint);
  user-select: none;
}

.browser-frame img { width: 100%; }

/* 区块 */

.section { padding: 96px 0; }

.sec-alt {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.sec-head { text-align: center; margin-bottom: 52px; }

.sec-head h2 {
  font-size: clamp(26px, 3.6vw, 36px);
  color: var(--fg-strong);
  font-weight: 780;
  letter-spacing: -0.5px;
}

.sec-head > p { margin-top: 12px; font-size: 15.5px; color: var(--fg-soft); }

/* 功能 */

.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
}

.feat:hover {
  transform: translateY(-4px);
  border-color: rgb(110 127 242 / 0.5);
  box-shadow: 0 18px 44px rgb(0 0 0 / 0.3);
}

.feat-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: rgb(110 127 242 / 0.13);
  color: var(--accent);
  margin-bottom: 16px;
}

.feat h3 { color: var(--fg-strong); font-size: 16.5px; margin-bottom: 8px; }

.feat > p { font-size: 13.5px; color: var(--fg-soft); }

/* 界面 */

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.shot-light { display: none; }
:root[data-theme="light"] .shot-light { display: block; }
:root[data-theme="light"] .shot-dark { display: none; }

/* 下载 */

.dl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
}

.dl {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 18px;
  transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
  color: inherit;
}

a.dl:hover {
  transform: translateY(-4px);
  border-color: rgb(110 127 242 / 0.55);
  box-shadow: 0 18px 44px rgb(0 0 0 / 0.3);
  color: inherit;
}

.dl-os { font-size: 15.5px; font-weight: 700; color: var(--fg-strong); }

.dl-file {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-faint);
  overflow-wrap: anywhere;
}

.dl-go { margin-top: auto; font-size: 13px; font-weight: 600; color: var(--accent); }

.dl.is-static { border-style: dashed; }

/* 部署 */

.deploy {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
  margin-top: 52px;
}

.deploy h3 { color: var(--fg-strong); font-size: 21px; margin-bottom: 10px; }

.deploy > div > p { font-size: 14.5px; }

.points { list-style: none; display: grid; gap: 10px; margin-top: 18px; }

.points li { position: relative; padding-left: 20px; font-size: 14px; color: var(--fg-soft); }

.points li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }

.points code,
.faq-body code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--code-fg);
  background: var(--code-bg);
  border-radius: 5px;
  padding: 1px 7px;
}

.code-block {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--panel);
}

.code-block pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.95;
  padding: 20px 24px;
  overflow-x: auto;
  color: var(--fg);
}

.code-block .c { color: var(--fg-faint); }
.code-block .p { color: var(--accent); }

/* 常见问题 */

.faq { max-width: 780px; margin: 0 auto; display: grid; gap: 10px; }

.faq details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.faq details[open] { border-color: rgb(110 127 242 / 0.5); }

.faq summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 24px;
  color: var(--fg-strong);
  font-size: 15px;
  font-weight: 600;
  user-select: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 18px;
  color: var(--accent);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.faq details[open] summary::after { transform: rotate(45deg); }

.faq .faq-body { padding: 0 24px 20px; font-size: 14px; color: var(--fg-soft); }

/* 页脚 */

.footer { border-top: 1px solid var(--line); background: var(--bg-soft); padding: 44px 0 36px; }

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand { display: flex; align-items: center; gap: 10px; color: var(--fg-strong); font-weight: 700; }
.footer-brand img { width: 22px; height: 22px; border-radius: 6px; }

.footer-links { display: flex; gap: 20px; font-size: 14px; }
.footer-links a { color: var(--fg-soft); }
.footer-links a:hover { color: var(--fg-strong); }

.footer-meta { font-size: 12.5px; color: var(--fg-faint); }

@media (max-width: 980px) {
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: 1fr; }
  .deploy { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 700px) {
  .nav-links { display: none; }
  .feat-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .feat, .dl, .btn { transition: none; }
}