:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Microsoft YaHei', sans-serif;
  --bg: #101112;
  --surface: #181a1c;
  --surface-hover: #1e2123;
  --border: #2b2e30;
  --text: #f1f2f2;
  --muted: #a2a7aa;
  --quiet: #858d91;
  --accent: #bce9d1;
  color: var(--text);
  background: var(--bg);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}
body {
  margin: 0;
  line-height: 1.75;
}
a {
  color: var(--accent);
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
a:hover {
  color: #e4f8ec;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}
svg {
  display: block;
}
p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}
strong {
  color: var(--text);
  font-weight: 600;
}
h1,
h2,
h3 {
  font-weight: 600;
  color: var(--text);
}
.skip-link {
  position: absolute;
  z-index: 20;
  left: 24px;
  top: 12px;
  padding: 8px 16px;
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-200%);
}
.skip-link:focus {
  transform: translateY(0);
}
.site-header {
  max-width: 1200px;
  min-height: 88px;
  padding: 20px 32px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--border);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 21px;
  line-height: 1;
  font-weight: 650;
  letter-spacing: -0.7px;
  flex-shrink: 0;
}
.brand img {
  border-radius: 8px;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13px;
}
.site-header nav a {
  text-decoration: none;
  color: var(--muted);
  white-space: nowrap;
  transition: color 0.18s;
}
.site-header nav a:hover,
.site-header nav a[aria-current] {
  color: var(--text);
}
.site-header nav a[aria-current] {
  position: relative;
}
.site-header nav a[aria-current]::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--accent);
}
.site-header nav .nav-download {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border: 1px solid #42474a;
  border-radius: 6px;
  color: var(--text);
}
.nav-download svg,
.text-link svg,
.card-bottom svg,
.button svg,
.quick-start > svg,
.sidebar-cta svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.5;
  flex-shrink: 0;
}
.hub {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px 56px;
}
.hub-intro {
  padding: 64px 0 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.eyebrow {
  font-size: 11px;
  font-weight: 550;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin: 0 0 18px;
}
.eyebrow span {
  color: #626b6b;
  margin: 0 8px;
}
h1 {
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.3;
  letter-spacing: -1.8px;
  margin: 0 0 20px;
}
.lead {
  font-size: 15px;
  line-height: 1.9;
  margin: 0;
}
.quick-start {
  display: flex;
  gap: 16px;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  border-bottom: 1px solid #363c3d;
  padding: 16px 0;
  align-self: flex-end;
  margin-bottom: 6px;
  flex-shrink: 0;
}
.quick-start strong {
  display: block;
  font-size: 13px;
}
.quick-start small {
  display: block;
  color: var(--quiet);
  font-size: 12px;
  margin-top: 3px;
}
.quick-start > svg {
  color: var(--quiet);
  margin-left: 12px;
}
.quick-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid #3c5047;
  color: var(--accent);
  border-radius: 50%;
}
.quick-icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.5;
  transform: rotate(-45deg);
}
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin: 0 0 20px;
}
.section-heading h2 {
  margin: 0;
  font-size: 16px;
  letter-spacing: -0.3px;
}
.section-heading > span {
  color: var(--quiet);
  font-size: 11px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.featured-guide {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.2s;
}
.featured-guide:hover {
  border-color: #63746a;
}
.feature-copy {
  padding: 36px 40px;
  align-self: center;
}
.tag {
  display: inline-block;
  padding: 3px 9px;
  font-size: 10px;
  line-height: 1.7;
  border: 1px solid #3f5549;
  border-radius: 4px;
  color: var(--accent);
  margin: 0 0 16px;
}
.feature-copy h3 {
  font-size: 28px;
  line-height: 1.45;
  letter-spacing: -0.7px;
  margin: 0 0 16px;
}
.feature-copy > p:not(.tag) {
  max-width: 360px;
  font-size: 13px;
  line-height: 1.9;
  margin-bottom: 20px;
}
.inline-steps {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 24px;
  gap: 8px;
  font-size: 11px;
  color: var(--quiet);
}
.inline-steps li + li::before {
  content: '/';
  margin-right: 8px;
  color: #51585c;
}
.text-link {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  font-weight: 550;
  color: var(--accent);
}
.feature-art {
  position: relative;
  min-height: 352px;
  overflow: hidden;
  background-color: #1b2622;
  background-image: radial-gradient(#63756a55 0.6px, transparent 0.6px);
  background-size: 15px 15px;
  border-right: 1px solid var(--border);
}
.art-caption {
  position: absolute;
  left: 24px;
  right: 24px;
  top: 17px;
  display: flex;
  align-items: center;
  gap: 7px;
  color: #a2b9ac;
  font-size: 10px;
  letter-spacing: 0.4px;
}
.art-caption > span:last-child {
  margin-left: auto;
  color: #93a298;
  font-size: 9px;
}
.art-dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}
.reference-frame {
  position: absolute;
  top: 48px;
  width: 48%;
  left: 26%;
  transform: rotate(-4deg);
  border: 1px solid #718b7d;
  border-radius: 6px;
  overflow: hidden;
  background: #293b31;
  box-shadow: 0 12px 26px #080d0b30;
}
.reference-frame > svg {
  width: 100%;
  height: auto;
}
.frame-label {
  display: flex;
  justify-content: space-between;
  padding: 5px 9px;
  color: #c0d3c6;
  font-size: 8px;
  letter-spacing: 1px;
}
.connection-line {
  position: absolute;
  top: 180px;
  height: 72px;
  left: 50%;
  border-left: 1px dashed #a0bdac;
}
.shot-strip {
  position: absolute;
  display: flex;
  gap: 9px;
  width: 84%;
  left: 8%;
  bottom: 39px;
}
.shot-strip > div {
  flex: 1;
  min-width: 0;
  background: #26372d;
  border: 1px solid #667e70;
  border-radius: 5px;
  overflow: hidden;
}
.shot-strip span {
  position: relative;
  z-index: 1;
  display: block;
  background: #26372d;
  padding: 4px 7px;
  color: #c1d3c7;
  font-size: 8px;
}
.shot-strip svg {
  width: 100%;
  height: 70px;
  object-fit: cover;
}
.shot-strip > div:nth-child(2) svg {
  transform: scale(1.1);
  transform-origin: 50% 70%;
}
.shot-strip > div:nth-child(3) svg {
  transform: scale(1.28);
  transform-origin: 52% 80%;
}
.art-timeline {
  position: absolute;
  bottom: 19px;
  left: 8%;
  width: 84%;
  display: flex;
  gap: 5px;
}
.art-timeline span {
  height: 6px;
  flex: 1;
  border-radius: 2px;
  background: #789587;
}
.art-timeline span:nth-child(2) {
  background: #aec4b7;
}
.art-timeline i {
  position: absolute;
  left: 40%;
  bottom: -4px;
  height: 15px;
  border-left: 1px solid #e0f1e5;
}
.tutorial-section {
  margin-top: 44px;
}
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.tutorial-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
  background: var(--surface);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.tutorial-card:hover {
  border-color: #54605b;
  background: var(--surface-hover);
  transform: translateY(-3px);
}
.tutorial-art {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.tutorial-art svg {
  width: 100%;
  height: auto;
  transition: transform 0.3s;
}
.tutorial-card:hover .tutorial-art svg {
  transform: scale(1.035);
}
.card-copy {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-kicker {
  font-size: 10px;
  color: var(--quiet);
  letter-spacing: 0.6px;
  margin: 0 0 9px;
}
.card-copy h3 {
  margin: 0 0 10px;
  font-size: 17px;
  letter-spacing: -0.4px;
}
.card-copy > p:not(.card-kicker) {
  font-size: 12px;
  line-height: 1.9;
  margin: 0 0 24px;
}
.card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #c6ccce;
  font-size: 11px;
  gap: 14px;
  margin-top: auto;
}
.card-bottom svg {
  width: 16px;
  height: 16px;
}
.resource-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin-top: 40px;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}
.resource-link .eyebrow {
  display: block;
  font-size: 10px;
  margin-bottom: 8px;
}
.resource-link h2 {
  font-size: 20px;
  letter-spacing: -0.5px;
  margin: 0 0 8px;
}
.resource-link p {
  margin: 0;
  font-size: 12px;
}
.resource-link > svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.5;
  margin-right: 12px;
  flex-shrink: 0;
}
.next {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 52px;
  padding: 32px;
  background: #1b2420;
  border: 1px solid #35463c;
  border-radius: 9px;
}
.next .eyebrow {
  margin-bottom: 10px;
  font-size: 10px;
}
.next h2 {
  font-size: 23px;
  line-height: 1.4;
  letter-spacing: -0.5px;
  margin: 0 0 10px;
}
.next p:last-child {
  margin: 0;
  font-size: 12px;
  color: #a5b4aa;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 11px 17px;
  background: var(--accent);
  color: #1c2b23;
  font-size: 12px;
  font-weight: 600;
  border-radius: 5px;
  text-decoration: none;
  flex-shrink: 0;
}
.button:hover {
  background: #d7f3e3;
  color: #17231c;
}
.model-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.video-model-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.model-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  padding: 24px;
  background: var(--surface);
  border-radius: 9px;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.model-card:hover {
  border-color: #5d6b64;
  background: var(--surface-hover);
}
.model-card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.model-card-top .card-kicker {
  margin: 0;
}
.model-icon {
  width: 38px;
  height: 38px;
  padding: 10px;
  border: 1px solid #424c51;
  border-radius: 8px;
  color: #bed7ee;
  background: #23303a;
}
.model-icon.bytedance {
  color: #bce4d9;
  background: #25332f;
  border-color: #40554b;
}
.model-icon svg {
  width: 18px;
  height: 18px;
}
.model-card h3 {
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 12px;
  letter-spacing: -0.2px;
}
.model-card > p {
  font-size: 12px;
  margin-bottom: 18px;
}
.model-tag {
  font-size: 10px;
  color: var(--quiet);
  margin-bottom: 32px;
}
.model-card .card-bottom {
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.catalog-note {
  font-size: 12px;
  margin-top: 24px;
}
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1136px;
  margin: 0 auto;
  padding: 28px 0 36px;
  border-top: 1px solid var(--border);
}
.site-footer > div {
  display: flex;
  align-items: center;
  gap: 20px;
}
.site-footer .brand {
  font-size: 16px;
}
.site-footer span,
.site-footer nav {
  font-size: 11px;
  color: var(--quiet);
}
.site-footer nav {
  display: flex;
  gap: 24px;
}
.site-footer nav a {
  text-decoration: none;
  color: var(--muted);
}
.article-layout {
  display: grid;
  grid-template-columns: 208px minmax(0, 720px);
  gap: 72px;
  max-width: 1136px;
  margin: 0 auto;
  padding: 56px 32px 64px;
}
.article-sidebar {
  position: sticky;
  top: 32px;
  align-self: start;
}
.back-link {
  display: block;
  text-decoration: none;
  font-size: 12px;
  margin-bottom: 32px;
  color: var(--muted);
}
.toc {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  gap: 12px;
  padding-left: 18px;
}
.toc p {
  color: var(--quiet);
  font-size: 11px;
  margin: 0 0 5px;
}
.toc a {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
  text-decoration: none;
}
.toc a:hover {
  color: var(--accent);
}
.sidebar-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  text-decoration: none;
  margin-top: 32px;
}
.article-content {
  min-width: 0;
  font-size: 15px;
}
.article-content h1 {
  font-size: clamp(29px, 3.1vw, 38px);
  line-height: 1.45;
  letter-spacing: -1px;
  margin-bottom: 22px;
  text-wrap: pretty;
}
.article-content .lead {
  padding-bottom: 32px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.article-content h2 {
  font-size: 22px;
  line-height: 1.55;
  margin: 40px 0 16px;
  letter-spacing: -0.4px;
}
.article-content p,
.article-content li {
  color: #adb3b7;
  line-height: 1.95;
}
.article-content li + li {
  margin-top: 14px;
}
.article-content ul,
.article-content ol {
  padding-left: 23px;
}
.article-content li::marker {
  color: var(--accent);
}
.article-content blockquote {
  margin: 24px 0;
  padding: 24px;
  color: #d5e3dc;
  background: #1b2420;
  border: 1px solid #344a3d;
  border-left: 3px solid #96bfaa;
  border-radius: 0 6px 6px 0;
  line-height: 1.95;
}
.article-content .article-note {
  color: var(--quiet);
  border-top: 1px solid var(--border);
  padding-top: 24px;
  margin-top: 40px;
  font-size: 11px;
}
.article-content .next {
  padding: 24px;
  margin-top: 32px;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}
.article-content .next h2 {
  font-size: 22px;
  margin-top: 0;
}
.article-content .next .eyebrow {
  color: var(--accent);
}
.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border);
  border-radius: 6px;
}
table {
  border-collapse: collapse;
  width: 100%;
  text-align: left;
  font-size: 13px;
}
th,
td {
  padding: 14px 18px;
  min-width: 128px;
  vertical-align: top;
}
th {
  background: var(--surface);
  font-weight: 550;
}
td {
  color: var(--muted);
  border-top: 1px solid var(--border);
}
code {
  font-size: 0.87em;
  overflow-wrap: anywhere;
  padding: 2px 5px;
  background: #242829;
  border-radius: 3px;
}
@media (max-width: 1000px) {
  .feature-copy {
    padding: 28px;
  }
  .feature-copy h3 {
    font-size: 25px;
  }
  .quick-start {
    gap: 12px;
  }
  .quick-icon {
    display: none;
  }
  .article-layout {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 36px;
  }
  .site-footer {
    margin: 0 32px;
  }
}
@media (max-width: 760px) {
  .site-header {
    flex-wrap: wrap;
    padding: 20px 24px;
    gap: 22px;
  }
  .site-header nav {
    gap: 20px;
  }
  .hub {
    padding: 0 24px 36px;
  }
  .hub-intro {
    padding: 40px 0 36px;
    display: block;
  }
  .quick-start {
    max-width: 360px;
    margin-top: 24px;
    padding: 12px 0;
  }
  .quick-start > svg {
    margin-left: auto;
  }
  .quick-icon {
    display: flex;
  }
  .section-heading h2 {
    font-size: 14px;
  }
  .featured-guide {
    grid-template-columns: 1fr;
  }
  .feature-art {
    min-height: 320px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .reference-frame {
    width: 200px;
    left: calc(50% - 100px);
    top: 45px;
  }
  .shot-strip,
  .art-timeline {
    max-width: 400px;
    width: 84%;
    left: 50%;
    transform: translateX(-50%);
  }
  .feature-copy {
    padding: 28px;
  }
  .feature-copy h3 br {
    display: none;
  }
  .feature-copy > p:not(.tag) {
    max-width: none;
  }
  .tutorial-grid {
    gap: 14px;
  }
  .card-copy {
    padding: 18px 16px;
  }
  .card-copy h3 {
    font-size: 15px;
  }
  .model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .next {
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
  }
  .site-footer {
    margin: 0 24px;
    flex-wrap: wrap;
  }
  .article-layout {
    display: block;
    padding: 32px 24px 40px;
  }
  .article-sidebar {
    position: static;
    margin-bottom: 32px;
  }
  .back-link {
    margin-bottom: 16px;
  }
  .toc {
    display: none;
  }
  .sidebar-cta {
    display: none;
  }
}
@media (max-width: 540px) {
  .site-header {
    padding: 18px 20px;
    gap: 22px;
  }
  .brand {
    font-size: 20px;
  }
  .brand img {
    width: 28px;
    height: 28px;
  }
  .site-header nav {
    width: 100%;
    gap: 12px;
    justify-content: space-between;
    font-size: 12px;
  }
  .site-header nav .nav-download {
    padding: 6px 9px;
    gap: 4px;
  }
  .nav-download svg {
    width: 13px;
  }
  .site-header nav a[aria-current]::after {
    bottom: -7px;
  }
  .hub {
    padding: 0 20px 32px;
  }
  h1 {
    font-size: 32px;
    letter-spacing: -1px;
  }
  .lead {
    font-size: 14px;
  }
  .eyebrow {
    font-size: 10px;
  }
  .hub-intro {
    padding-top: 32px;
  }
  .section-heading > span {
    display: none;
  }
  .feature-copy {
    padding: 24px;
  }
  .feature-copy h3 {
    font-size: 23px;
  }
  .feature-art {
    min-height: 286px;
  }
  .reference-frame {
    width: 175px;
    left: calc(50% - 87.5px);
  }
  .shot-strip {
    gap: 6px;
    bottom: 32px;
  }
  .shot-strip svg {
    height: 58px;
  }
  .shot-strip span {
    padding: 4px;
    font-size: 7px;
  }
  .art-timeline {
    bottom: 16px;
  }
  .tutorial-grid,
  .model-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .tutorial-art svg {
    max-height: 178px;
  }
  .art-video {
    background: #15242d;
  }
  .art-board {
    background: #2b251e;
  }
  .art-install {
    background: #20232d;
  }
  .card-copy {
    padding: 22px;
  }
  .card-copy h3 {
    font-size: 19px;
  }
  .card-copy > p:not(.card-kicker) {
    font-size: 13px;
  }
  .card-bottom {
    font-size: 12px;
  }
  .tutorial-section {
    margin-top: 32px;
  }
  .resource-link {
    margin-top: 32px;
  }
  .resource-link h2,
  .next h2 {
    font-size: 21px;
  }
  .next {
    margin-top: 32px;
    padding: 24px;
  }
  .site-footer {
    margin: 0 20px;
    padding-top: 24px;
  }
  .site-footer > div {
    display: block;
  }
  .site-footer span {
    display: block;
    margin-top: 12px;
  }
  .article-layout {
    padding-left: 20px;
    padding-right: 20px;
  }
  .article-content {
    font-size: 14px;
  }
  .article-content h2 {
    font-size: 21px;
  }
  .article-content blockquote {
    padding: 20px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}