:root {
  --bg: #efe6d5;
  --paper: rgba(255, 250, 242, 0.82);
  --paper-strong: #fff8ef;
  --text: #201911;
  --muted: #6b6257;
  --line: rgba(32, 25, 17, 0.12);
  --accent: #b44f21;
  --accent-dark: #87340e;
  --accent-soft: #f4d7bf;
  --shadow: 0 20px 60px rgba(76, 42, 16, 0.12);
  --radius: 24px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(180, 79, 33, 0.14), transparent 24%),
    radial-gradient(circle at 90% 10%, rgba(120, 124, 70, 0.18), transparent 18%),
    linear-gradient(180deg, #f4ecdf 0%, #ebdfcc 100%);
}

code,
pre {
  font-family: var(--mono);
}

.page-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 20px;
  border-right: 1px solid var(--line);
  background: rgba(255, 248, 239, 0.45);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 8px;
  color: inherit;
  text-decoration: none;
  margin-bottom: 28px;
}

.brand-badge {
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.brand-text {
  font-size: 22px;
  font-weight: 700;
}

.nav {
  display: grid;
  gap: 10px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 14px;
  transition: 0.18s ease;
}

.nav a:hover,
.nav a.active {
  background: rgba(180, 79, 33, 0.1);
  color: var(--accent-dark);
}

.content {
  padding: 42px clamp(20px, 4vw, 52px) 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 24px;
  align-items: stretch;
  margin-bottom: 44px;
}

.hero-copy,
.hero-panel,
.card,
.step,
.code-block,
.faq-item,
.tip {
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-copy {
  padding: 38px;
  border-radius: 32px;
}

.hero-panel {
  padding: 28px;
  border-radius: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.02;
}

.hero-text,
.section-text,
.card p,
.faq-item p,
.step p,
.tip {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button,
.copy-btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, opacity 0.16s ease, background 0.16s ease;
}

.button:hover,
.copy-btn:hover {
  transform: translateY(-1px);
}

.button.primary,
.copy-btn {
  background: var(--accent);
  color: #fff;
}

.button.ghost-tag {
  background: rgba(32, 25, 17, 0.06);
  color: var(--text);
}

.button.secondary,
.copy-btn.ghost {
  background: rgba(180, 79, 33, 0.1);
  color: var(--accent-dark);
}

.copy-btn.small {
  padding: 8px 12px;
  font-size: 13px;
}

.panel-title,
.card-kicker {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
}

.check-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.8;
}

.section {
  margin-top: 34px;
}

.section.accent {
  padding: 28px;
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(244, 215, 191, 0.82), rgba(255, 248, 239, 0.72));
  border: 1px solid rgba(180, 79, 33, 0.16);
}

.section-head {
  margin-bottom: 20px;
}

.section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(26px, 3vw, 38px);
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.step,
.faq-item,
.code-block,
.tip {
  border-radius: var(--radius);
}

.card {
  padding: 24px;
}

.metrics .metric {
  position: relative;
  overflow: hidden;
}

.metrics .metric::after {
  content: "";
  position: absolute;
  inset: auto -20px -30px auto;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(180, 79, 33, 0.12), transparent 70%);
}

.card h3,
.faq-item h3,
.step h3 {
  margin: 0 0 10px;
}

.card code,
.station-card code {
  display: block;
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(32, 25, 17, 0.06);
  overflow-wrap: anywhere;
}

.featured {
  outline: 2px solid rgba(180, 79, 33, 0.28);
}

.tip {
  margin-top: 18px;
  padding: 18px 20px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.quick-picks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.pick {
  padding: 22px;
  border-radius: 22px;
  background: rgba(255, 248, 239, 0.7);
  border: 1px solid rgba(180, 79, 33, 0.12);
}

.pick h3 {
  margin: 0 0 10px;
}

.pick p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.plain-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.9;
}

.step {
  padding: 22px;
}

.step span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--accent-dark);
  font-weight: 700;
}

.code-block {
  overflow: hidden;
}

.code-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

pre {
  margin: 0;
  padding: 18px;
  overflow: auto;
  font-size: 13px;
  line-height: 1.7;
}

.faq {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 20px 22px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  padding: 12px 16px;
  border-radius: 999px;
  background: #24170f;
  color: #fff;
  opacity: 0;
  transform: translateY(8px);
  transition: 0.18s ease;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .hero,
  .grid.three,
  .grid.two,
  .steps,
  .quick-picks {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .content {
    padding: 24px 16px 56px;
  }

  .hero-copy,
  .hero-panel,
  .card,
  .step,
  .faq-item,
  .tip,
  .code-head,
  pre {
    padding-left: 16px;
    padding-right: 16px;
  }

  .nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-actions,
  .card-actions {
    flex-direction: column;
  }
}