/* ---------------------------------------------------------------
   FitCode — 官网样式。纯静态，无构建步骤，无外部依赖。
   --------------------------------------------------------------- */

:root {
  --bg: #080b11;
  --bg-2: #0b1018;
  --panel: #0f1620;
  --panel-2: #0c121a;
  --line: #1e2734;
  --line-soft: #182029;
  --fg: #e6edf6;
  --fg-dim: #9aa8bc;
  --fg-faint: #6b7a8f;
  --accent: #5ea8ff;
  --accent-2: #a78bfa;
  --accent-soft: rgba(94, 168, 255, 0.12);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", Roboto, "Helvetica Neue", sans-serif;
  --radius: 16px;
  --wrap: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(760px 420px at 50% -8%, rgba(94, 168, 255, 0.16), transparent 70%),
    radial-gradient(620px 380px at 88% 4%, rgba(167, 139, 250, 0.09), transparent 70%);
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.wrap {
  width: min(100% - 40px, var(--wrap));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 16px;
  top: 12px;
  z-index: 100;
  background: var(--panel);
  padding: 8px 14px;
  border-radius: 8px;
}

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 11, 17, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--fg);
  font-weight: 650;
  letter-spacing: -0.01em;
  font-size: 16px;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 22px;
  margin-right: auto;
  font-size: 14px;
}

.nav a {
  color: var(--fg-dim);
}

.nav a:hover {
  color: var(--fg);
  text-decoration: none;
}

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

.lang {
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--fg-dim);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 11px;
  cursor: pointer;
}

.lang:hover {
  color: var(--fg);
  border-color: #2f3d50;
}

.ghost {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--fg-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}

.ghost:hover {
  color: var(--fg);
  border-color: #2f3d50;
  text-decoration: none;
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 76px 0 84px;
  text-align: center;
  overflow: hidden;
}

.hero .glow {
  position: absolute;
  inset: -1px 0 auto;
  height: 520px;
  z-index: -1;
  background-image:
    linear-gradient(rgba(94, 168, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 168, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(560px 300px at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(560px 300px at 50% 0%, #000 20%, transparent 78%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fg-faint);
  letter-spacing: 0.02em;
}

.pill {
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid rgba(94, 168, 255, 0.3);
  background: var(--accent-soft);
  color: #a9d1ff;
}

.sep {
  opacity: 0.45;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 700;
  background: linear-gradient(180deg, #ffffff 10%, #b9cbe2 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 14px 0 0;
  font-size: clamp(19px, 2.5vw, 28px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #cfdcec;
}

.lede {
  max-width: 660px;
  margin: 16px auto 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  color: var(--fg-dim);
  line-height: 1.75;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 20px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--fg);
  font-size: 14.5px;
  font-weight: 550;
  background: rgba(255, 255, 255, 0.02);
  transition:
    background 0.16s ease,
    border-color 0.16s ease,
    transform 0.16s ease;
}

.btn:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.06);
  border-color: #334154;
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #06101c;
  font-weight: 650;
  box-shadow: 0 10px 30px -12px rgba(94, 168, 255, 0.7);
}

.btn.primary:hover {
  background: #7ab8ff;
  border-color: #7ab8ff;
}

.btn.quiet {
  border-color: transparent;
  background: transparent;
  color: var(--fg-dim);
}

/* ---------- demo ---------- */

.demo {
  margin: 46px auto 0;
  max-width: 880px;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #0f1620, #0a1017);
  box-shadow:
    0 40px 90px -50px rgba(0, 0, 0, 0.95),
    0 0 0 1px rgba(255, 255, 255, 0.02) inset;
  overflow: hidden;
}

.demo-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line-soft);
}

.demo-dots {
  display: flex;
  gap: 6px;
}

.demo-dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #26313f;
}

.demo-file {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-faint);
  margin-right: auto;
}

.demo-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #0a0f17;
}

.demo-switch button {
  font: inherit;
  font-size: 12px;
  line-height: 1;
  padding: 6px 13px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--fg-faint);
  cursor: pointer;
  transition:
    color 0.16s ease,
    background 0.16s ease;
}

.demo-switch button[aria-pressed="true"] {
  color: #cfe6ff;
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px rgba(94, 168, 255, 0.32);
}

.demo-tabs {
  display: flex;
  gap: 2px;
  padding: 0 8px;
  background: #0a0f17;
  border-bottom: 1px solid var(--line-soft);
}

.demo-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font: inherit;
  font-family: var(--mono);
  font-size: 12px;
  padding: 8px 14px;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--fg-faint);
  cursor: pointer;
}

.demo-tab:hover {
  color: var(--fg-dim);
}

.demo-tab[aria-selected="true"] {
  color: var(--fg);
  background: #0f1620;
  border-bottom-color: var(--accent);
}

.demo-tab .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
}

.demo-panel {
  position: relative;
  height: 252px;
  overflow: hidden;
  background: #0c121a;
  /* 与 site.js 里的常量保持一致 */
  --gutter: 46px;
  --minimap: 44px;
  --scroll: 10px;
}

.demo-gutter {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--gutter);
  padding: 12px 9px 0 0;
  text-align: right;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 22px;
  color: var(--fg-faint);
  border-right: 1px solid var(--line-soft);
}

.demo-gutter span {
  display: block;
  opacity: 0.28;
  transition: opacity 0.2s ease;
}

.demo-gutter span.is-cursor {
  opacity: 1;
  color: #9dc7f5;
}

.demo-scrollable {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--gutter);
  right: calc(var(--minimap) + var(--scroll));
  overflow: hidden;
  padding-top: 12px;
  transition:
    left 0.16s ease,
    width 0.16s ease;
}

.demo-code {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 22px;
  color: #c3d3e6;
  white-space: pre;
  tab-size: 4;
}

.demo-code .ln {
  white-space: pre;
}

.demo-code .ln.is-cursor {
  background: rgba(94, 168, 255, 0.07);
  box-shadow: inset 2px 0 0 rgba(94, 168, 255, 0.55);
}

.demo-minimap {
  position: absolute;
  top: 0;
  bottom: 0;
  right: var(--scroll);
  width: var(--minimap);
  padding: 8px 8px 0 10px;
}

.demo-minimap::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(124, 152, 186, 0.45) 0 2px,
    transparent 2px 5px
  );
  background-size: 100% 100%;
  -webkit-mask-image: linear-gradient(to right, #000 0 78%, transparent 100%);
  mask-image: linear-gradient(to right, #000 0 78%, transparent 100%);
}

.demo-scrollbar {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--scroll);
}

.demo-scrollbar i {
  position: absolute;
  left: 3px;
  right: 3px;
  top: 14%;
  height: 30%;
  border-radius: 3px;
  background: #39465a;
  transition: background 0.2s ease;
}

.demo:hover .demo-scrollbar i {
  background: #4a5a72;
}

.demo-pad {
  position: absolute;
  top: 8px;
  bottom: 8px;
  width: 0;
  border: 1px dashed rgba(94, 168, 255, 0.32);
  border-radius: 7px;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.18s ease,
    width 0.16s ease,
    left 0.16s ease;
}

.demo-panel[data-mode="on"] .demo-gutter span:not(.is-cursor) {
  opacity: 0;
}

.demo-cap {
  margin: 16px auto 0;
  max-width: 760px;
  font-size: 13.5px;
  color: var(--fg-faint);
}

/* ---------- sections ---------- */

.section {
  padding: 84px 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 72px;
}

.sec-head {
  max-width: 680px;
  margin-bottom: 40px;
}

.sec-head h2 {
  margin: 0;
  font-size: clamp(23px, 3vw, 30px);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.sec-head p {
  margin: 12px 0 0;
  color: var(--fg-dim);
  font-size: 15.5px;
}

/* ---------- feature cards ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.022), rgba(255, 255, 255, 0.008));
  transition:
    border-color 0.18s ease,
    transform 0.18s ease;
}

.card:hover {
  border-color: #2c3a4d;
  transform: translateY(-2px);
}

.card .ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 28px;
  padding: 0 8px;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: #9cc9ff;
  background: var(--accent-soft);
  border: 1px solid rgba(94, 168, 255, 0.22);
  border-radius: 8px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fg-dim);
}

/* ---------- figure ---------- */

.figure {
  margin: 0 0 44px;
  padding: 18px;
  border-radius: 14px;
  background: #f4f7fa;
  border: 1px solid var(--line);
}

.shot {
  margin: 0;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #0c121a;
  overflow: hidden;
  box-shadow: 0 30px 70px -50px rgba(0, 0, 0, 0.9);
}

.shot img {
  display: block;
  width: 100%;
  height: auto;
}

.shot figcaption {
  padding: 10px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  color: var(--fg-faint);
}

.figure img {
  display: block;
  width: 100%;
  height: auto;
}

.figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  color: #5a6675;
  text-align: center;
}

/* ---------- how steps ---------- */

.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 20px 20px 4px;
  border-left: 1px solid var(--line);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.steps h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
}

.steps p {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--fg-dim);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(94, 168, 255, 0.1);
  border: 1px solid rgba(94, 168, 255, 0.14);
  color: #b7d8ff;
}

.note {
  margin: 32px 0 0;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid rgba(94, 168, 255, 0.5);
  background: rgba(94, 168, 255, 0.04);
  color: var(--fg-dim);
  font-size: 14px;
}

/* ---------- install ---------- */

.install {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.install-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: i;
}

.install-steps li {
  counter-increment: i;
  position: relative;
  padding: 0 0 26px 44px;
}

.install-steps li::before {
  content: counter(i);
  position: absolute;
  left: 0;
  top: -1px;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(94, 168, 255, 0.32);
  background: var(--accent-soft);
  color: #a9d1ff;
  font-family: var(--mono);
  font-size: 12.5px;
}

.install-steps h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
}

.install-steps p {
  margin: 0;
  font-size: 14px;
  color: var(--fg-dim);
}

.code {
  position: relative;
  margin: 0 0 20px;
}

.code pre,
.recipe pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: #070c13;
  color: #b8c9df;
  font-family: var(--mono);
  font-size: 12.8px;
  line-height: 1.75;
  scrollbar-width: none;
}

.code pre::-webkit-scrollbar,
.recipe pre::-webkit-scrollbar {
  display: none;
}

.code pre code,
.recipe pre code {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.code-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 6px;
}

.copy {
  font: inherit;
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #101823;
  color: var(--fg-dim);
  cursor: pointer;
}

.copy:hover {
  color: var(--fg);
  border-color: #334154;
}

.tips {
  display: grid;
  gap: 12px;
}

.tip {
  padding: 15px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.014);
}

.tip strong {
  display: block;
  font-size: 13.5px;
  margin-bottom: 4px;
}

.tip p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--fg-dim);
}

.tip.warn {
  border-color: rgba(240, 180, 90, 0.28);
  background: rgba(240, 180, 90, 0.05);
}

.tip.warn strong {
  color: #f2c680;
}

/* ---------- agent prompt ---------- */

.agent {
  margin-top: 32px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.06), rgba(255, 255, 255, 0.012));
}

.agent > div:first-child {
  max-width: 680px;
  margin-bottom: 16px;
}

.agent-badge {
  display: inline-block;
  margin: 0 0 10px;
  padding: 1px 9px;
  border-radius: 999px;
  border: 1px solid rgba(167, 139, 250, 0.32);
  background: rgba(167, 139, 250, 0.12);
  color: #cbbaff;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.7;
}

.agent h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
}

.agent p {
  margin: 0;
  font-size: 14px;
  color: var(--fg-dim);
}

.agent .code {
  margin: 0;
}

.agent pre {
  font-size: 12.4px;
  line-height: 1.72;
}

.agent pre code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- settings table ---------- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.012);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  min-width: 720px;
}

th,
td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-faint);
  background: rgba(255, 255, 255, 0.02);
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover td {
  background: rgba(94, 168, 255, 0.03);
}

td:first-child code {
  white-space: nowrap;
}

td:nth-child(2) {
  font-family: var(--mono);
  font-size: 12.5px;
  color: #9fc2ea;
  white-space: nowrap;
}

td:nth-child(3) {
  color: var(--fg-dim);
}

td:nth-child(4) {
  color: var(--fg-faint);
  font-size: 12.5px;
  white-space: nowrap;
}

.recipes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.recipe h3 {
  margin: 0 0 8px;
  font-size: 13.5px;
  font-weight: 550;
  color: var(--fg-dim);
}

.recipe pre {
  padding: 12px 14px;
  font-size: 11.8px;
}

/* ---------- limits ---------- */

.limits {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 860px;
}

.limits li {
  position: relative;
  padding: 14px 18px 14px 42px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  font-size: 14px;
  color: var(--fg-dim);
  background: rgba(255, 255, 255, 0.012);
}

.limits li::before {
  content: "!";
  position: absolute;
  left: 16px;
  top: 14px;
  width: 17px;
  height: 17px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10.5px;
  color: #f2c680;
  border: 1px solid rgba(240, 180, 90, 0.35);
  background: rgba(240, 180, 90, 0.1);
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--line-soft);
  padding: 30px 0 46px;
  font-size: 13px;
  color: var(--fg-faint);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
  justify-content: space-between;
}

.brand-mini {
  font-weight: 650;
  color: var(--fg-dim);
  margin-right: 10px;
}

.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer a {
  color: var(--fg-dim);
}

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

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .recipes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .steps,
  .recipes {
    grid-template-columns: 1fr;
  }
  .install,
  .agent {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav {
    display: none;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(100% - 28px, var(--wrap));
  }
  .hero {
    padding: 52px 0 60px;
  }
  .section {
    padding: 60px 0;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .demo-panel {
    height: 228px;
    --gutter: 36px;
    --minimap: 0px;
  }
  .demo-minimap {
    display: none;
  }
  .demo-code,
  .demo-gutter {
    font-size: 11.5px;
    line-height: 20px;
  }
  .demo-gutter {
    padding-top: 11px;
  }
  .demo-scrollable {
    padding-top: 11px;
  }
  .demo-switch button {
    padding: 5px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}