:root {
  --ink: #172033;
  --muted: #647084;
  --paper: #f7f8fb;
  --panel: #ffffff;
  --line: #dce2ec;
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --gold: #d99f31;
  --coral: #d95f43;
  --night: #0f172a;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 6vw;
  background: rgba(247, 248, 251, 0.92);
  border-bottom: 1px solid rgba(220, 226, 236, 0.8);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.contact-actions,
.lang-toggle {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: white;
  background: var(--night);
  border-radius: 8px;
  letter-spacing: 0;
}

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

.nav-links a {
  text-decoration: none;
}

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

.lang-toggle {
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--night);
  background: white;
  font: inherit;
  font-size: 14px;
  font-weight: 850;
  cursor: pointer;
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.lang-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.52fr);
  gap: 32px;
  min-height: calc(100vh - 72px);
  padding: 8vh 6vw 10vh;
  overflow: hidden;
  color: white;
  background:
    radial-gradient(circle at 15% 12%, rgba(217, 159, 49, 0.28), transparent 34%),
    linear-gradient(135deg, #0f172a 0%, #12313a 52%, #203047 100%);
}

#agent-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.58;
}

.hero-content,
.hero-panel {
  position: relative;
  z-index: 1;
}

.hero-content {
  align-self: center;
  max-width: 880px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #7dd3c7;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(52px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: 0;
}

h1 span {
  display: block;
  color: #f1d18a;
  font-size: clamp(32px, 5vw, 62px);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.25;
}

.hero-lede {
  max-width: 730px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2vw, 25px);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

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

.primary:hover {
  background: var(--accent-strong);
}

.secondary {
  color: inherit;
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
}

.section .secondary,
.contact-section .secondary {
  color: var(--ink);
  border-color: var(--line);
  background: white;
}

.hero-panel {
  align-self: end;
  display: grid;
  gap: 14px;
  padding-bottom: 2vh;
}

.hero-panel div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
}

.metric {
  display: block;
  color: #f1d18a;
  font-size: 28px;
  font-weight: 900;
}

.section,
.contact-section {
  padding: 88px 6vw;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2 {
  color: var(--night);
}

.strength-grid,
.project-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.strength-grid article,
.project-card,
.timeline-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
}

.strength-grid article {
  padding: 24px;
}

.strength-grid p,
.project-card p,
.muted,
.info-list span,
.contact-section p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.45fr) minmax(0, 1fr);
  gap: 42px;
  align-items: start;
  background: #eef4f3;
}

.skill-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skill-cloud span {
  padding: 10px 14px;
  border: 1px solid #c9d7d5;
  border-radius: 8px;
  color: #12313a;
  background: rgba(255, 255, 255, 0.72);
  font-weight: 750;
}

.timeline {
  display: grid;
  gap: 26px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 24px;
}

.timeline-date {
  color: var(--accent);
  font-weight: 900;
}

.timeline-card {
  padding: 26px;
}

.timeline-card ul {
  margin: 18px 0 0;
  padding-left: 20px;
}

.timeline-card li + li {
  margin-top: 10px;
}

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

.project-card {
  min-height: 232px;
  padding: 24px;
}

.project-card a {
  display: inline-flex;
  margin: 12px 12px 0 0;
  color: var(--accent);
  font-weight: 850;
  text-decoration: none;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  background: white;
}

.info-list {
  display: grid;
  gap: 14px;
}

.info-list p {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  margin: 0 6vw 72px;
  padding: 44px;
  color: white;
  background:
    linear-gradient(120deg, rgba(217, 95, 67, 0.82), rgba(15, 118, 110, 0.9)),
    var(--night);
  border-radius: 8px;
}

.contact-section .eyebrow,
.contact-section p {
  color: rgba(255, 255, 255, 0.82);
}

.contact-section h2 {
  max-width: 760px;
  margin-bottom: 12px;
}

.contact-actions {
  justify-content: flex-end;
  margin: 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 6vw 42px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer a {
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .site-header {
    gap: 16px;
  }

  .hero,
  .split,
  .two-column,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 80px;
  }

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

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

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

  .contact-actions {
    justify-content: flex-start;
  }
}

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

  .hero,
  .section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-actions,
  .contact-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-panel,
  .strength-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .contact-section {
    margin: 0 20px 52px;
    padding: 28px 22px;
  }

  .site-footer {
    flex-direction: column;
    padding-left: 20px;
    padding-right: 20px;
  }
}