:root {
  --bg: #eef3f0;
  --paper: #fbfaf4;
  --paper-strong: #ffffff;
  --ink: #1f2933;
  --muted: #6a6f77;
  --line: rgba(31, 41, 51, 0.13);
  --line-strong: rgba(31, 41, 51, 0.22);
  --accent: #0f6f73;
  --accent-strong: #064f53;
  --accent-soft: #dff1ef;
  --warm: #c77948;
  --warm-soft: #f4ddc8;
  --code-bg: #172226;
  --code-ink: #ecfdf5;
  --shadow: 0 24px 70px rgba(32, 43, 41, 0.12);
  --radius: 26px;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(15, 111, 115, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(15, 111, 115, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 18% 10%, rgba(199, 121, 72, 0.18), transparent 24rem),
    radial-gradient(circle at 86% 18%, rgba(15, 111, 115, 0.2), transparent 28rem),
    linear-gradient(135deg, #fffaf0 0%, #edf5f1 100%);
  background-size: 42px 42px, 42px 42px, auto, auto, auto;
  font-family: "LXGW WenKai", "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

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

a:hover {
  text-decoration: underline;
}

code {
  padding: 0.15rem 0.42rem;
  color: #07575b;
  background: rgba(15, 111, 115, 0.1);
  border: 1px solid rgba(15, 111, 115, 0.13);
  border-radius: 0.5rem;
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.91em;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 76px;
  padding: 0 2rem;
  background: rgba(255, 250, 240, 0.9);
  border-bottom: 1px solid rgba(31, 41, 51, 0.1);
  box-shadow: 0 16px 44px rgba(32, 43, 41, 0.08);
  backdrop-filter: blur(22px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--ink);
  text-decoration: none;
}

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

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  color: #fffaf0;
  background: linear-gradient(145deg, var(--accent), #073f42);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 16px 34px rgba(15, 111, 115, 0.22);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand strong,
.brand em {
  display: block;
}

.brand strong {
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.brand em {
  color: var(--muted);
  font-size: 0.78rem;
  font-style: normal;
}

.top-actions {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.top-actions a,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 1rem;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.top-actions a:hover,
.btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  text-decoration: none;
}

.btn.primary {
  color: #fffaf0;
  background: var(--accent);
  border-color: var(--accent);
}

.layout {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 1.2rem;
}

.sidebar {
  position: sticky;
  top: 96px;
  align-self: start;
  max-height: calc(100vh - 116px);
  margin-top: 1.5rem;
  padding: 1rem;
  overflow: auto;
  background: rgba(255, 253, 247, 0.9);
  border: 1px solid rgba(31, 41, 51, 0.1);
  border-radius: var(--radius);
  box-shadow: 0 18px 52px rgba(32, 43, 41, 0.1);
  backdrop-filter: blur(18px);
}

.search {
  display: grid;
  gap: 0.45rem;
}

.search span,
.nav-tree p,
.kicker,
.config-grid span,
.panel-line span,
.model-grid article > span,
.steps article > span {
  color: var(--warm);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.search input {
  width: 100%;
  height: 42px;
  padding: 0 0.9rem;
  color: var(--ink);
  background: #fffdf7;
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: none;
  font: inherit;
}

.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 111, 115, 0.12);
}

.nav-tree {
  margin-top: 1rem;
  display: grid;
  gap: 0.25rem;
}

.nav-tree p {
  margin: 1rem 0 0.3rem;
}

.nav-tree a {
  display: flex;
  align-items: center;
  min-height: 38px;
  padding: 0 0.75rem;
  color: #3b4652;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  transition: background 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.nav-tree a:hover,
.nav-tree a.active {
  color: var(--accent-strong);
  background: linear-gradient(90deg, #ffffff, rgba(223, 241, 239, 0.8));
  transform: translateX(3px);
}

.content {
  padding: 1.5rem 0 5rem;
  display: grid;
  gap: 1.25rem;
}

.section-block {
  background: rgba(255, 253, 247, 0.94);
  border: 1px solid rgba(31, 41, 51, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise-in 0.44s ease both;
}

.hero {
  min-height: 500px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 2rem;
  align-items: center;
  padding: clamp(2rem, 4.2vw, 4rem);
  background:
    linear-gradient(145deg, rgba(255, 250, 240, 0.96), rgba(223, 241, 239, 0.92)),
    radial-gradient(circle at 10% 10%, rgba(199, 121, 72, 0.2), transparent 25rem);
}

.hero h1 {
  max-width: 740px;
  margin: 0.5rem 0 0;
  font-size: clamp(2.8rem, 5.6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.hero p {
  max-width: 720px;
  margin: 1.4rem 0 0;
  color: #4c5865;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

.hero-panel {
  position: relative;
  padding: 1rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.08), transparent),
    #0f1f23;
  border-radius: 28px;
  box-shadow: 0 28px 70px rgba(15, 31, 35, 0.28);
  isolation: isolate;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: -30px -20px auto auto;
  width: 140px;
  height: 140px;
  background: var(--warm);
  border-radius: 999px;
  filter: blur(45px);
  opacity: 0.42;
  z-index: -1;
}

.panel-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.7rem;
  padding: 1rem;
  color: #ecfdf5;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.panel-line:last-child {
  border-bottom: 0;
}

.panel-line code {
  grid-column: 1 / -1;
  color: #ecfdf5;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  word-break: break-all;
}

.copy {
  border: 0;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.section-head {
  padding: 2rem 2rem 0;
}

.section-head h2 {
  margin: 0.3rem 0 0;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.section-head p {
  max-width: 760px;
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.doc-section {
  padding-bottom: 2rem;
}

.doc-section > h3,
.doc-section > p,
.doc-section > pre,
.doc-section > ol,
.doc-section > ul,
.doc-section > .note,
.doc-section > .config-grid,
.doc-section > .model-grid,
.doc-section > .steps,
.doc-section > .split,
.doc-section > .faq {
  margin-left: 2rem;
  margin-right: 2rem;
}

.steps,
.model-grid,
.config-grid,
.split,
.route-grid,
.downloads-grid,
.tip-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 2rem 2rem;
}

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

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

.steps article,
.model-grid article,
.config-grid div,
.split article,
.route-grid article,
.downloads-grid article,
.tip-grid article,
.note,
.faq details {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.steps article,
.model-grid article,
.config-grid div,
.split article,
.route-grid article,
.downloads-grid article,
.tip-grid article {
  padding: 1.2rem;
}

.steps article h3,
.model-grid article h3,
.split article h3,
.route-grid article h3,
.downloads-grid article h3,
.tip-grid article h3 {
  margin: 0.5rem 0 0;
  font-size: 1.12rem;
}

.steps article p,
.model-grid article p,
.split article p,
.route-grid article p,
.downloads-grid article p,
.tip-grid article p {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.steps.compact {
  margin-top: 1.5rem;
}

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

.config-grid div span {
  display: block;
  margin-bottom: 0.5rem;
}

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

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

.mini-list {
  margin: 0.9rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.mini-list li + li {
  margin-top: 0.45rem;
}

.inline-link {
  display: inline-flex;
  align-items: center;
  margin-top: 1rem;
  font-weight: 800;
}

.compact-list {
  margin-top: 0.8rem;
  margin-bottom: 0;
}

.table-wrap {
  margin: 1.5rem 2rem 0;
  overflow: auto;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}

.doc-table th,
.doc-table td {
  padding: 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.doc-table th {
  color: var(--accent-strong);
  background: rgba(15, 111, 115, 0.08);
  font-size: 0.88rem;
  font-weight: 800;
}

.doc-table tr:last-child td {
  border-bottom: 0;
}

.clean-list {
  padding-left: 3.4rem;
}

.clean-list li + li {
  margin-top: 0.6rem;
}

.note {
  margin-top: 1.2rem;
  padding: 1rem 1.1rem;
  color: #314950;
  background: var(--accent-soft);
  border-color: rgba(15, 111, 115, 0.18);
}

.note.warning {
  background: var(--warm-soft);
  border-color: rgba(199, 121, 72, 0.26);
}

.doc-section > h3 {
  margin-top: 2rem;
  margin-bottom: 0.6rem;
  font-size: 1.2rem;
}

pre {
  position: relative;
  margin-top: 1rem;
  padding: 1.25rem;
  overflow: auto;
  color: var(--code-ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent),
    var(--code-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 22px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

pre .copy {
  position: sticky;
  left: 100%;
  top: 0;
  float: right;
  margin-left: 1rem;
}

pre code {
  display: block;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 0.88rem;
  white-space: pre;
}

.faq {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.faq details {
  padding: 1rem 1.1rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 800;
}

.faq p {
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.doc-shot {
  margin: 1.4rem 2rem 0;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 18px 40px rgba(32, 43, 41, 0.08);
}

.doc-shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid rgba(31, 41, 51, 0.08);
}

.doc-shot figcaption {
  margin-top: 0.85rem;
  color: var(--muted);
  font-size: 0.92rem;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
  }

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

  .nav-tree p {
    grid-column: 1 / -1;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 620px;
  }
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    padding: 0.9rem 1rem;
    flex-direction: column;
  }

  .top-actions {
    width: 100%;
    margin-left: 0;
  }

  .layout {
    width: min(100% - 20px, var(--max));
  }

  .nav-tree,
  .steps,
  .config-grid,
  .model-grid,
  .split,
  .route-grid,
  .downloads-grid,
  .tip-grid {
    grid-template-columns: 1fr;
  }

  .table-wrap {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .hero {
    min-height: auto;
    padding: 1.4rem;
  }

  .hero h1 {
    font-size: clamp(2.3rem, 14vw, 4.2rem);
  }

  .section-head,
  .doc-section > h3,
  .doc-section > p,
  .doc-section > pre,
  .doc-section > ol,
  .doc-section > ul,
  .doc-section > .note,
  .doc-section > .doc-shot,
  .doc-section > .config-grid,
  .doc-section > .model-grid,
  .doc-section > .steps,
  .doc-section > .split,
  .doc-section > .faq {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .section-head {
    padding: 1.4rem 1rem 0;
  }

  .clean-list {
    padding-left: 2.2rem;
  }
}