:root {
  --paper: #f4f2ec;
  --ink: #171613;
  --muted: #6d6960;
  --line: #d7d0c2;
  --soft: #e9e4d9;
  --accent: #ff5a3d;
  --accent-dark: #b92f20;
  --white: #fffdf7;
  --shadow: 0 28px 90px rgb(43 34 24 / 0.18);
  --radius: 6px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgb(23 22 19 / 0.06) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", Arial, sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 80% 8%, rgb(255 90 61 / 0.16), transparent 28%);
  z-index: -1;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 8vw;
  border-bottom: 1px solid var(--line);
  background: rgb(244 242 236 / 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  font-size: 11px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.nav a {
  position: relative;
  padding: 24px 0;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18px;
  height: 1px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  transition: transform 180ms ease;
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(380px, 1.28fr);
  min-height: calc(100dvh - 68px);
  padding: clamp(36px, 5vw, 78px) 8vw;
  gap: clamp(64px, 7vw, 132px);
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.kicker {
  margin: 0 0 16px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(86px, 10.5vw, 154px);
  line-height: 0.82;
  letter-spacing: 0;
  white-space: nowrap;
}

h2 {
  margin-bottom: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", Arial, sans-serif;
  font-size: clamp(38px, 5.8vw, 88px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 14px;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", Arial, sans-serif;
  font-size: clamp(23px, 2.5vw, 36px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0;
}

.hero-line {
  max-width: 560px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: clamp(18px, 2.1vw, 26px);
  line-height: 1.32;
}

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

.button,
.contact-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 112px;
  min-height: 44px;
  padding: 0 26px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.button:active,
.contact-link:active {
  transform: translateY(1px);
}

.button.primary {
  background: var(--ink);
  color: var(--white);
}

.button.secondary {
  background: transparent;
}

.button:hover,
.button:focus-visible,
.contact-link:hover,
.contact-link:focus-visible {
  background: var(--accent);
  color: var(--ink);
}

.hero-visual {
  position: relative;
  min-width: 0;
  margin: 0;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--soft);
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgb(255 253 247 / 0.52);
  z-index: 1;
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.section-grid,
.capabilities,
.work,
.build,
.contact {
  padding: clamp(68px, 10vw, 140px) 8vw;
  border-top: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.88fr) minmax(320px, 1.12fr);
  gap: clamp(32px, 6vw, 86px);
}

.section-title.narrow {
  max-width: 920px;
  margin-bottom: 42px;
}

.section-title,
.about-body,
.build-copy,
.contact-inner,
.work-list {
  min-width: 0;
}

.about-body p,
.build-copy p,
.contact-inner p {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.55;
}

.signal-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 44px;
  border: 1px solid var(--line);
  background: rgb(255 253 247 / 0.42);
}

.signal-board div {
  min-height: 126px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.signal-board div:nth-child(2n) {
  border-right: 0;
}

.signal-board div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.signal-board strong {
  display: block;
  margin-bottom: 24px;
  color: var(--accent-dark);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 30px;
}

.signal-board span {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.35;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: minmax(230px, auto);
  gap: 12px;
}

.capability {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 230px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(255 253 247 / 0.58);
}

.capability.large {
  grid-column: span 2;
}

.capability.tall {
  grid-row: span 2;
  background:
    linear-gradient(145deg, rgb(255 90 61 / 0.12), transparent 44%),
    rgb(23 22 19 / 0.94);
  color: var(--white);
}

.capability.accent {
  background: var(--accent);
}

.cap-index {
  margin-bottom: 48px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.capability.tall .cap-index,
.capability.tall p {
  color: rgb(255 253 247 / 0.72);
}

.capability p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.capability.accent p,
.capability.accent .cap-index {
  color: rgb(23 22 19 / 0.74);
}

.work {
  display: grid;
  grid-template-columns: minmax(260px, 0.62fr) minmax(360px, 1.38fr);
  gap: clamp(32px, 5vw, 76px);
}

.work-list {
  display: grid;
  grid-column: 1 / -1;
  gap: 14px;
}

.case-feature {
  display: grid;
  grid-template-columns: minmax(320px, 1.15fr) minmax(280px, 0.85fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: stretch;
  grid-column: 1 / -1;
  margin-top: 18px;
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(255 253 247 / 0.58);
}

.case-feature figure {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--soft);
}

.case-feature img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.case-feature-alt figure {
  order: 2;
}

.case-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(12px, 2vw, 24px);
}

.case-copy p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.62;
}

.case-copy ul {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.case-copy li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
}

.work-item {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 26px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.work-item:last-child {
  border-bottom: 1px solid var(--line);
}

.work-code {
  color: var(--accent-dark);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", Arial, sans-serif;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.1;
}

.work-item p {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.5;
}

.work-item span {
  display: block;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.build-stage {
  display: grid;
  grid-template-columns: minmax(320px, 0.96fr) minmax(320px, 1.04fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}

.terminal-card {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0f0f0d;
  color: #fffdf7;
  box-shadow: var(--shadow);
}

.terminal-top {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-bottom: 1px solid rgb(255 253 247 / 0.14);
}

.terminal-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

pre {
  margin: 0;
  padding: clamp(20px, 3vw, 34px);
  overflow-x: auto;
  font-size: clamp(13px, 1.5vw, 17px);
  line-height: 1.7;
}

code {
  font-family: "Courier New", Consolas, monospace;
}

.contact {
  min-height: 72dvh;
  display: grid;
  align-items: center;
}

.contact-inner {
  max-width: 1180px;
}

.contact h2 {
  max-width: 1050px;
  margin-bottom: 24px;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 8vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.reveal-enabled [data-reveal] {
  opacity: 1;
  transform: none;
}

.reveal-enabled [data-reveal].is-visible,
[data-reveal] {
  opacity: 1;
  transform: translateY(0);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 5vw;
  }

  .nav {
    gap: 12px;
    font-size: 10px;
  }

  .hero,
  .section-grid,
  .work,
  .build-stage,
  .case-feature {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 34px 5vw 58px;
  }

  .section-grid,
  .capabilities,
  .work,
  .build,
  .contact {
    padding-left: 5vw;
    padding-right: 5vw;
  }

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

  .capability.large,
  .capability.tall {
    grid-column: span 1;
    grid-row: span 1;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding-top: 18px;
    padding-bottom: 16px;
  }

  .nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .nav a {
    padding: 4px 0;
  }

  .nav a::after {
    bottom: -2px;
  }

  .hero {
    min-height: auto;
  }

  h1 {
    font-size: clamp(70px, 22vw, 90px);
  }

  .hero-line {
    max-width: 18em;
    font-size: 18px;
  }

  .signal-board,
  .capability-grid {
    grid-template-columns: 1fr;
  }

  .signal-board div,
  .signal-board div:nth-child(2n),
  .signal-board div:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .signal-board div:last-child {
    border-bottom: 0;
  }

  .work-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .case-feature {
    padding: 10px;
  }

  .case-feature-alt figure {
    order: 0;
  }

  .case-feature img {
    min-height: 240px;
  }

  .footer {
    flex-direction: column;
  }
}