:root {
  --bg: #f3efe7;
  --bg-deep: #d7cfbe;
  --surface: rgba(255, 252, 247, 0.72);
  --surface-strong: #fffdf8;
  --text: #1e1c19;
  --muted: #615b52;
  --line: rgba(30, 28, 25, 0.1);
  --accent: #c65a2e;
  --accent-deep: #8a3312;
  --shadow: 0 24px 60px rgba(72, 43, 26, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Aptos", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(198, 90, 46, 0.18), transparent 30%),
    radial-gradient(circle at 85% 20%, rgba(88, 123, 127, 0.16), transparent 24%),
    linear-gradient(180deg, #f8f4ec 0%, var(--bg) 55%, #efe8db 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(30, 28, 25, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 28, 25, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 70%);
}

.site-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 20px auto 48px;
}

.hero,
.section,
.stats {
  position: relative;
  z-index: 1;
}

.hero {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 36px;
  background: linear-gradient(135deg, rgba(255, 252, 247, 0.92), rgba(248, 241, 230, 0.72));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  right: -60px;
  top: -90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 90, 46, 0.2), transparent 65%);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

.topbar-links {
  display: flex;
  gap: 18px;
}

.topbar-links a,
.contact-card a {
  color: inherit;
  text-decoration: none;
}

.topbar-links a:hover,
.contact-card a:hover {
  color: var(--accent-deep);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 28px;
  margin-top: 48px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.hero h1,
.section h2 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero h1 {
  max-width: 9ch;
  font-size: clamp(2.8rem, 6vw, 5.6rem);
}

.hero-summary,
.project-summary,
.skill-card p,
.card p,
.timeline-content p,
.contact-card p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  padding: 14px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

.button.secondary {
  background: rgba(255, 255, 255, 0.55);
  color: var(--text);
}

.hero-panel,
.project-card,
.skill-card,
.card,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  backdrop-filter: blur(16px);
}

.hero-panel {
  padding: 20px;
}

.panel-block + .panel-block {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.panel-label,
.project-role {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.tag-list,
.project-points,
.project-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.tag-list li,
.project-metrics span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(30, 28, 25, 0.08);
  font-size: 0.92rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 18px 0 30px;
}

.stats article,
.timeline-item {
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 252, 247, 0.72);
  backdrop-filter: blur(14px);
}

.stats strong {
  display: block;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  margin-bottom: 6px;
}

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

.section {
  margin-top: 18px;
  padding: 28px;
  border-radius: 32px;
  border: 1px solid var(--line);
  background: rgba(255, 252, 247, 0.6);
  backdrop-filter: blur(14px);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.about-grid,
.skills-grid {
  display: grid;
  gap: 18px;
}

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

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

.card,
.skill-card {
  padding: 22px;
}

.project-card {
  padding: 24px;
}

.project-card + .project-card {
  margin-top: 18px;
}

.project-card.featured {
  background: linear-gradient(135deg, rgba(255, 247, 239, 0.95), rgba(251, 242, 233, 0.82));
}

.project-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.project-head h3,
.card h3,
.skill-card h3,
.timeline-content h3 {
  margin: 0;
}

.project-stack {
  max-width: 360px;
  margin: 0;
  text-align: right;
  color: var(--muted);
  line-height: 1.6;
}

.project-summary {
  margin: 14px 0 18px;
}

.project-points {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.project-points li {
  color: var(--text);
  line-height: 1.75;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 18px;
}

.timeline-meta {
  font-weight: 800;
  color: var(--accent-deep);
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
}

.contact-card a {
  width: fit-content;
  font-size: 1.15rem;
  font-weight: 700;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal-delay-1 {
  transition-delay: 120ms;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .hero-grid,
  .about-grid,
  .skills-grid,
  .timeline-item,
  .stats {
    grid-template-columns: 1fr;
  }

  .project-head,
  .section-heading,
  .topbar {
    flex-direction: column;
    align-items: start;
  }

  .project-stack {
    max-width: none;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: min(100% - 18px, 100%);
    margin: 10px auto 24px;
  }

  .hero,
  .section {
    padding: 20px;
    border-radius: 24px;
  }

  .topbar-links {
    flex-wrap: wrap;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.2rem, 14vw, 3.6rem);
  }
}