:root {
  color-scheme: light;
  --bg: #f7f5f0;
  --surface: #ffffff;
  --surface-soft: #ece9df;
  --ink: #181817;
  --muted: #696762;
  --line: #d9d4c7;
  --accent: #0f766e;
  --accent-dark: #0b534f;
  --blue: #2556a3;
  --plum: #6f3c72;
  --dark: #161819;
  --dark-ink: #f5f0e7;
  --radius: 8px;
  --shadow: 0 24px 70px rgba(32, 29, 22, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  min-height: 72px;
  padding: 0 48px;
  border-bottom: 1px solid rgba(217, 212, 199, 0.78);
  background: rgba(247, 245, 240, 0.86);
  backdrop-filter: blur(18px);
}

.brand,
.nav,
.language-switch,
.hero-actions,
.contact-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  font-size: 14px;
}

.nav {
  justify-content: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

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

.language-switch {
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.lang-btn {
  min-width: 48px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  line-height: 28px;
}

.lang-btn.is-active {
  background: var(--ink);
  color: var(--bg);
}

.section,
.section-band {
  padding: 104px 48px;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
}

.section-band {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  gap: 56px;
  align-items: center;
  max-width: 1320px;
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 72px);
  padding-top: 86px;
  padding-bottom: 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 800px;
  margin-bottom: 24px;
  font-size: clamp(44px, 6vw, 80px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.06;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.hero-lede {
  max-width: 700px;
  margin-bottom: 18px;
  color: #35332f;
  font-size: 21px;
  line-height: 1.55;
}

.hero-proof,
.section-heading p,
.contact p {
  color: var(--muted);
  font-size: 17px;
}

.hero-proof {
  max-width: 720px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 720px;
  margin-top: 28px;
}

.hero-stats div {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.hero-stats strong {
  display: block;
  color: var(--ink);
  font-size: 28px;
  line-height: 1;
}

.hero-stats span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.hero-actions,
.contact-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 10px 18px;
  font-weight: 700;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

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

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

.button-secondary {
  background: transparent;
  color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  border: 1px solid rgba(24, 24, 23, 0.12);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(15, 118, 110, 0.12), transparent 34%),
    linear-gradient(315deg, rgba(37, 86, 163, 0.12), transparent 38%),
    #fbfaf6;
  box-shadow: var(--shadow);
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(24, 24, 23, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 24, 23, 0.07) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.72), transparent 92%);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 92px 72px 46px;
  border: 1px solid rgba(24, 24, 23, 0.16);
  border-radius: 18px;
}

.visual-topline {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 26px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.visual-core {
  position: absolute;
  top: 74px;
  right: 0;
  left: 0;
  z-index: 2;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.core-ring {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(24, 24, 23, 0.14);
  border-radius: 999px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 14px 36px rgba(24, 24, 23, 0.08);
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
  text-align: center;
}

.visual-grid {
  position: absolute;
  inset: 138px 36px 36px;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.visual-card {
  position: relative;
  display: flex;
  min-height: 168px;
  flex-direction: column;
  justify-content: flex-end;
  border: 1px solid rgba(24, 24, 23, 0.12);
  border-radius: var(--radius);
  padding: 22px;
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(12px);
}

.visual-card::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 22px;
  width: 42px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
}

.visual-card span {
  position: absolute;
  top: 16px;
  right: 18px;
  color: rgba(24, 24, 23, 0.34);
  font-size: 13px;
  font-weight: 800;
}

.visual-card h3 {
  margin-bottom: 6px;
  font-size: 24px;
}

.visual-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.visual-card-system::before {
  background: var(--blue);
}

.visual-card-delivery::before {
  background: var(--plum);
}

.visual-card-ai::before {
  background: var(--ink);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

.fit-strip {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 20px;
  max-width: 1180px;
  margin: -28px auto 0;
  padding: 0 48px 56px;
}

.fit-strip div {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.fit-strip span {
  display: block;
  margin-bottom: 8px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 800;
}

.fit-strip p {
  margin-bottom: 0;
  color: #33312d;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}

.signal-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: 48px;
  padding-top: 70px;
}

.signal-intro {
  position: sticky;
  top: 100px;
  align-self: start;
}

.signal-intro p {
  color: var(--muted);
  font-size: 17px;
}

.signal-grid {
  display: grid;
  gap: 12px;
}

.signal-card {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 22px;
  border: 1px solid rgba(24, 24, 23, 0.1);
  border-radius: var(--radius);
  padding: 22px;
  background: rgba(255, 255, 255, 0.64);
}

.signal-card span {
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.signal-card h3 {
  margin-bottom: 8px;
}

.signal-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.section-muted {
  max-width: none;
  background: var(--surface-soft);
}

.section-muted .section-heading,
.section-muted .capability-grid {
  max-width: 1180px;
  margin-right: auto;
  margin-left: auto;
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.timeline-meta {
  color: var(--muted);
  font-size: 14px;
}

.timeline-item p,
.capability-card p,
.experience-card p,
.project-card p,
.thinking-item p {
  margin-bottom: 0;
  color: var(--muted);
}

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

.capability-card,
.experience-card,
.project-card {
  min-height: 220px;
  border: 1px solid rgba(24, 24, 23, 0.1);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--surface);
}

.capability-card:nth-child(3n + 1) {
  border-top: 4px solid var(--accent);
}

.capability-card:nth-child(3n + 2) {
  border-top: 4px solid var(--blue);
}

.capability-card:nth-child(3n) {
  border-top: 4px solid var(--plum);
}

.experience-card {
  min-height: 240px;
}

.experience-card .client {
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.experience-value {
  margin-top: 18px;
  border-top: 1px solid rgba(24, 24, 23, 0.1);
  padding-top: 14px;
  color: #33312d;
  font-size: 14px;
  font-weight: 800;
}

.section-dark {
  max-width: none;
  background: var(--dark);
  color: var(--dark-ink);
}

.section-dark .section-heading,
.section-dark .project-grid {
  max-width: 1180px;
  margin-right: auto;
  margin-left: auto;
}

.section-dark .eyebrow {
  color: #7dd3c7;
}

.section-dark .section-heading p,
.project-card p {
  color: #c9c4b8;
}

.project-card {
  min-height: 300px;
  border-color: rgba(245, 240, 231, 0.16);
  background: #202323;
}

.project-status {
  display: inline-flex;
  margin-bottom: 24px;
  border: 1px solid rgba(125, 211, 199, 0.32);
  border-radius: 999px;
  padding: 5px 10px;
  color: #98e6dd;
  font-size: 13px;
  font-weight: 700;
}

.thinking-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.thinking-item {
  padding-top: 22px;
  border-top: 2px solid var(--ink);
}

.contact {
  grid-template-columns: minmax(0, 1fr) auto;
  border-top: 1px solid var(--line);
}

.contact h2 {
  max-width: 900px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 960px) {
  .site-header {
    grid-template-columns: 1fr auto;
    padding: 0 24px;
  }

  .nav {
    display: none;
  }

  .section,
  .section-band {
    padding: 72px 24px;
  }

  .section-band,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .fit-strip {
    grid-template-columns: 1fr;
    margin-top: 0;
    padding: 0 24px 44px;
  }

  .signal-section {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 56px;
  }

  .signal-intro {
    position: static;
  }

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

@media (max-width: 640px) {
  .site-header {
    min-height: 64px;
  }

  .brand span:last-child {
    display: none;
  }

  .section,
  .section-band {
    padding: 58px 18px;
  }

  h1 {
    font-size: 36px;
    line-height: 1.04;
  }

  .hero-lede {
    font-size: 17px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 22px;
  }

  .hero-stats strong {
    font-size: 24px;
  }

  .fit-strip {
    padding: 0 18px 38px;
  }

  .fit-strip p {
    font-size: 16px;
  }

  .signal-card {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 18px;
  }

  .capability-grid,
  .experience-grid,
  .project-grid,
  .thinking-list {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
    padding: 24px 18px;
  }

  .hero-visual {
    min-height: 640px;
  }

  .hero-visual::after {
    inset: 108px 28px 28px;
  }

  .visual-grid {
    inset: 132px 18px 18px;
    grid-template-columns: 1fr;
  }

  .core-ring {
    min-height: 40px;
    padding: 8px 14px;
    font-size: 18px;
  }

  .visual-card {
    min-height: 126px;
    padding: 18px;
  }

  .visual-card h3 {
    font-size: 21px;
  }
}