:root {
  --ink: #111827;
  --muted: #5f6b7a;
  --soft: #f7f9fc;
  --panel: #ffffff;
  --line: #d9e1ea;
  --blue: #2457c5;
  --blue-soft: #eef4ff;
  --green: #1f8a5b;
  --orange: #b96324;
  --code: #122033;
  --shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  --radius: 8px;
  --max: 1260px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 54px);
  border-bottom: 1px solid rgba(217, 225, 234, 0.92);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--blue);
}

.hero-section,
.section,
.about-hero {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(380px, 0.94fr);
  gap: clamp(28px, 4.6vw, 62px);
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: clamp(54px, 8vw, 96px) 0 58px;
}

.hero-copy h1,
.about-hero h1 {
  margin: 0;
  max-width: 900px;
  font-size: clamp(40px, 5.7vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-lead,
.section-heading p:not(.eyebrow),
.about-hero p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.hero-lead {
  max-width: 820px;
  margin: 24px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-weight: 750;
}

.button.primary {
  color: #fff;
  border-color: var(--blue);
  background: var(--blue);
}

.button.secondary {
  color: var(--blue);
  background: #fff;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 30px;
}

.metric-strip div,
.business-grid article,
.blueprint-step,
.talking-card,
.diagram-card,
.text-panel,
.detail-copy,
.speed-table,
.capacity-panel,
.runtime-copy,
.status-table,
.stack-card,
.compare-card,
.about-grid article,
.keyword-cloud span {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.metric-strip div {
  padding: 16px;
}

.metric-value {
  display: block;
  font-size: 28px;
  font-weight: 850;
  letter-spacing: -0.03em;
}

.metric-label {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.hero-visual {
  position: relative;
  min-height: 590px;
}

.viewer-shell,
.result-viewer {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(180deg, #fbfdff, #f3f6fa);
  box-shadow: var(--shadow);
}

.viewer-shell {
  height: 548px;
}

.viewer-caption {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 2;
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border: 1px solid rgba(17, 24, 39, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.viewer-caption span,
.input-card span {
  color: var(--muted);
  font-size: 12px;
}

.input-card {
  position: absolute;
  right: -8px;
  bottom: 0;
  width: min(270px, 45%);
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow);
}

.input-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 7px;
}

.input-card div {
  padding: 10px 4px 2px;
}

.input-card strong {
  display: block;
}

.section {
  padding: 72px 0;
}

.section.compact {
  padding-top: 46px;
}

.section-heading {
  max-width: 920px;
  margin-bottom: 26px;
}

.section-heading.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(30px, 3.7vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.problem-section,
.closing-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.business-grid,
.three-grid,
.serving-grid,
.blueprint-grid,
.detail-block,
.runtime-panel,
.stack-grid,
.about-grid {
  display: grid;
  gap: 14px;
}

.business-grid,
.three-grid,
.serving-grid,
.blueprint-grid,
.detail-block,
.about-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.business-grid article,
.feature-card,
.blueprint-step,
.talking-card,
.text-panel,
.detail-copy,
.runtime-copy,
.stack-card,
.about-grid article {
  padding: 22px;
}

.business-grid h3,
.feature-card h3,
.blueprint-step h3,
.talking-card h3,
.text-panel h3,
.detail-copy h3,
.runtime-copy h3,
.stack-card strong,
.about-grid h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.business-grid p,
.feature-card p,
.blueprint-step p,
.talking-card p,
.text-panel p,
.detail-copy p,
.runtime-copy p,
.stack-card span,
.about-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.68;
}

.feature-card {
  min-height: 250px;
}

.blueprint-step {
  position: relative;
  min-height: 260px;
  background: linear-gradient(180deg, #fff, #fbfcfe);
}

.blueprint-step > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 28px;
  margin-bottom: 30px;
  border: 1px solid #b8ccff;
  border-radius: 7px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 12px;
  font-weight: 850;
}

.blueprint-step small {
  display: block;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--green);
  line-height: 1.5;
  font-weight: 720;
}

.talking-card {
  margin-top: 14px;
  border-color: #b7e3cf;
  background: #f4fbf7;
}

.card-index {
  display: inline-flex;
  color: var(--orange);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.card-index + h3 {
  margin-top: 28px;
}

.diagram-card {
  padding: 22px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.75) inset;
}

.project-figure {
  margin: 0 0 24px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow);
}

.project-figure img {
  width: 100%;
  border: 1px solid #edf1f6;
  border-radius: 8px;
  background: #fff;
}

.project-figure figcaption {
  margin: 12px 2px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.flow-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.flow-title span {
  color: var(--muted);
  font-size: 13px;
}

.flow-title strong {
  font-size: 18px;
}

.flow-diagram {
  display: grid;
  align-items: stretch;
  gap: 10px;
}

.hunyuan-flow {
  grid-template-columns: 1.1fr auto 1.1fr auto 1.2fr auto 1.2fr auto 1fr;
}

.dataset-flow {
  grid-template-columns: 1fr auto 1fr auto 1.15fr auto 1.2fr auto 1.2fr auto 1.1fr;
}

.flow-node {
  display: grid;
  place-items: center;
  min-height: 74px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--soft);
  text-align: center;
  font-weight: 750;
  line-height: 1.35;
}

.flow-node.input {
  color: var(--blue);
  border-color: #b8ccff;
  background: var(--blue-soft);
}

.flow-node.output {
  color: var(--green);
  border-color: #b7e3cf;
  background: #eefaf4;
}

.flow-node.sub {
  background: #fbfbfc;
}

.flow-arrow {
  display: grid;
  place-items: center;
  min-width: 18px;
  color: var(--muted);
  font-weight: 900;
}

.two-column,
.hicache-layout,
.gallery-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.detail-block {
  margin-top: 16px;
}

.detail-copy {
  background: #fbfcfe;
}

.detail-copy h3,
.runtime-copy h3 {
  font-size: 18px;
}

.hicache-layout {
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
}

.cache-timeline {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  margin: 6px 0 18px;
}

.tick {
  min-height: 58px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}

.tick.full {
  color: #fff;
  border-color: var(--blue);
  background: var(--blue);
}

.tick.cache {
  color: var(--green);
  border-color: #b7e3cf;
  background: #eefaf4;
}

.speed-table {
  overflow: hidden;
}

.speed-row {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 0.8fr;
  border-bottom: 1px solid var(--line);
}

.speed-row:last-child {
  border-bottom: 0;
}

.speed-row span {
  padding: 14px 12px;
  border-right: 1px solid var(--line);
  color: var(--muted);
}

.speed-row span:first-child {
  color: var(--ink);
  font-weight: 750;
}

.speed-row span:last-child {
  border-right: 0;
  color: var(--green);
  font-weight: 850;
}

.speed-row.header {
  background: var(--soft);
}

.speed-row.header span {
  color: var(--ink);
  font-weight: 850;
}

.architecture-map {
  display: grid;
  grid-template-columns: 0.95fr auto 1.05fr auto 1.1fr;
  grid-template-areas:
    "client arrow1 gateway arrow2 queues"
    "workers workers workers workers workers"
    "state state observe observe observe";
  gap: 12px;
  align-items: stretch;
}

.arch-group {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.arch-group strong {
  font-size: 18px;
}

.arch-group span {
  color: var(--muted);
  line-height: 1.45;
}

.arch-group.client { grid-area: client; }
.arch-group.gateway { grid-area: gateway; }
.arch-group.queues { grid-area: queues; }
.arch-group.state { grid-area: state; }
.arch-group.observe { grid-area: observe; }

.arch-arrow {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-weight: 900;
}

.architecture-map > .arch-arrow:nth-child(2) {
  grid-area: arrow1;
}

.architecture-map > .arch-arrow:nth-child(4) {
  grid-area: arrow2;
}

.arch-workers {
  grid-area: workers;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.arch-group.gpu {
  border-color: #b8ccff;
  background: var(--blue-soft);
}

.arch-group.state {
  background: #fbfbfc;
}

.arch-group.observe {
  background: #eefaf4;
  border-color: #b7e3cf;
}

.capacity-panel {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
  padding: 14px;
  background: var(--soft);
}

.capacity-panel div {
  padding: 12px;
  border-radius: 7px;
  background: #fff;
}

.runtime-panel {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.runtime-copy {
  background: #fbfcfe;
}

.runtime-copy pre {
  overflow-x: auto;
  margin: 12px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: #dce7ff;
  background: var(--code);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 12px;
  line-height: 1.55;
}

.runtime-copy code {
  font-family: inherit;
}

.status-table {
  overflow: hidden;
  margin-top: 16px;
}

.status-row {
  display: grid;
  grid-template-columns: 0.9fr 1.55fr 1.35fr;
  border-bottom: 1px solid var(--line);
}

.status-row:last-child {
  border-bottom: 0;
}

.status-row span {
  padding: 14px 12px;
  border-right: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.5;
}

.status-row span:first-child {
  color: var(--ink);
  font-weight: 800;
}

.status-row span:last-child {
  border-right: 0;
}

.status-row.header {
  background: var(--soft);
}

.status-row.header span {
  color: var(--ink);
  font-weight: 850;
}

.gallery-layout {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.48fr);
}

.result-viewer {
  height: 640px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 58px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.toolbar > span {
  font-weight: 850;
}

.segmented {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--soft);
}

.segment {
  min-height: 30px;
  padding: 0 12px;
  border: 0;
  border-radius: 5px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-weight: 750;
}

.segment.active {
  color: #fff;
  background: var(--blue);
}

.case-panel {
  display: grid;
  gap: 14px;
  align-content: start;
}

.case-meta {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.case-meta span {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--muted);
  font-weight: 720;
}

.thumbnail-list {
  display: grid;
  gap: 10px;
}

.thumb {
  display: grid;
  grid-template-columns: 92px 1fr;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  text-align: left;
  font-weight: 800;
}

.thumb img {
  width: 92px;
  height: 70px;
  object-fit: cover;
  border-radius: 6px;
}

.thumb.active {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(36, 87, 197, 0.13);
}

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

.compare-card {
  min-height: 430px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.compare-card span {
  display: block;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
  font-weight: 850;
}

.compare-card.accent span {
  color: #fff;
  background: var(--blue);
}

.compare-card model-viewer {
  width: 100%;
  height: 370px;
  background: linear-gradient(180deg, #fbfdff, #f3f6fa);
}

.metric-table {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.metric-table div {
  display: grid;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.metric-table strong {
  font-size: 15px;
}

.metric-table span {
  font-size: 20px;
  font-weight: 850;
}

.metric-table em {
  color: var(--green);
  font-size: 13px;
  font-style: normal;
  line-height: 1.4;
}

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

.stack-card {
  display: grid;
  gap: 8px;
}

.stack-card strong {
  color: var(--code);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 14px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(18px, 4vw, 54px);
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer div {
  display: grid;
  gap: 4px;
}

.footer span {
  color: var(--muted);
}

.footer-links {
  display: flex !important;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
}

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

.about-main {
  min-height: 80vh;
}

.about-hero {
  padding: 84px 0 34px;
}

.about-hero p:not(.eyebrow) {
  max-width: 860px;
}

.about-section {
  padding-top: 28px;
}

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

.contact-list,
.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.contact-list a,
.keyword-cloud span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 11px;
  color: var(--blue);
  background: var(--blue-soft);
  font-weight: 750;
}

.keyword-cloud span {
  color: var(--ink);
  background: #fff;
}

@media (max-width: 1120px) {
  .hero-section,
  .gallery-layout,
  .two-column,
  .hicache-layout {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 520px;
  }

  .viewer-shell {
    height: 500px;
  }

  .metric-strip,
  .capacity-panel,
  .metric-table,
  .business-grid,
  .three-grid,
  .serving-grid,
  .blueprint-grid,
  .detail-block,
  .runtime-panel,
  .stack-grid,
  .about-grid,
  .comparison-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hunyuan-flow,
  .dataset-flow {
    grid-template-columns: 1fr;
  }

  .flow-arrow {
    min-height: 18px;
  }

  .architecture-map {
    grid-template-columns: 1fr;
    grid-template-areas:
      "client"
      "arrow1"
      "gateway"
      "arrow2"
      "queues"
      "workers"
      "state"
      "observe";
  }

  .arch-workers {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
    gap: 12px;
  }

  .hero-section {
    padding-top: 36px;
  }

  .metric-strip,
  .capacity-panel,
  .metric-table,
  .business-grid,
  .three-grid,
  .serving-grid,
  .blueprint-grid,
  .detail-block,
  .runtime-panel,
  .stack-grid,
  .about-grid,
  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .input-card {
    position: relative;
    right: auto;
    bottom: auto;
    width: 100%;
    margin-top: 12px;
  }

  .hero-visual {
    min-height: auto;
  }

  .viewer-shell,
  .result-viewer {
    height: 440px;
    min-height: 440px;
  }

  .toolbar,
  .flow-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .speed-row {
    grid-template-columns: 1fr;
  }

  .status-row {
    grid-template-columns: 1fr;
  }

  .speed-row span {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .status-row span {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .speed-row span:last-child {
    border-bottom: 0;
  }

  .status-row span:last-child {
    border-bottom: 0;
  }

  .cache-timeline {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
  }
}