:root {
  --bg: #eef4f7;
  --text: #12212f;
  --muted: #557086;
  --line: #b8cad9;
  --card: rgba(255, 255, 255, 0.78);
  --primary: #0f6b8f;
  --accent: #20bfa9;
  --highlight: #ffb347;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 5% 10%, #d5ecfb 0%, transparent 35%),
    radial-gradient(circle at 92% 18%, #e7fbf7 0%, transparent 36%), var(--bg);
  min-height: 100vh;
  line-height: 1.65;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.2;
  z-index: -3;
}

.bg-glow {
  position: fixed;
  width: 48vw;
  height: 48vw;
  border-radius: 50%;
  filter: blur(90px);
  z-index: -2;
  opacity: 0.3;
}

.bg-glow-a {
  background: #2bc8ff;
  top: -16vw;
  right: -14vw;
}

.bg-glow-b {
  background: #3dde9a;
  bottom: -18vw;
  left: -14vw;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 4vw;
  background: rgba(239, 246, 250, 0.75);
  border-bottom: 1px solid rgba(15, 107, 143, 0.14);
  backdrop-filter: blur(12px);
}

.logo {
  font-family: "Orbitron", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
}

.main-nav {
  display: flex;
  gap: 1.25rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
}

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

.cta {
  text-decoration: none;
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  border-radius: 999px;
  padding: 0.5rem 0.95rem;
  font-size: 0.86rem;
}

main {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding: 2.2rem 0 4.4rem;
}

.hero {
  display: grid;
  gap: 1.3rem;
  grid-template-columns: 1.25fr 1fr;
  align-items: stretch;
}

.hero-content,
.hero-stats,
.section,
.contact-panel {
  background: var(--card);
  border: 1px solid rgba(15, 107, 143, 0.14);
  border-radius: 18px;
  backdrop-filter: blur(12px);
}

.hero-content {
  padding: 1.7rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.hero-intro {
  flex: 1;
}

.avatar {
  flex-shrink: 0;
  align-self: center;
}

.avatar img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  text-transform: uppercase;
}

h1 {
  margin: 0.35rem 0;
  font-family: "Orbitron", sans-serif;
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1.1;
}

.hero-role {
  margin: 0.4rem 0;
  color: #155d80;
  font-weight: 700;
}

.hero-summary {
  margin-top: 0.65rem;
  color: #244155;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.hero-meta span {
  font-size: 0.85rem;
  color: #16496a;
  background: rgba(32, 191, 169, 0.12);
  border: 1px solid rgba(32, 191, 169, 0.3);
  border-radius: 999px;
  padding: 0.3rem 0.72rem;
}

.hero-stats {
  padding: 1.1rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.stat-card {
  margin: 0;
  padding: 1rem 0.75rem;
  border-radius: 14px;
  background: linear-gradient(150deg, #f4fcff, #f8fbff);
  border: 1px solid rgba(15, 107, 143, 0.2);
  text-align: center;
}

.stat-number {
  margin: 0;
  font-family: "Orbitron", sans-serif;
  font-size: 1.65rem;
  color: var(--primary);
  line-height: 1.1;
}

.stat-label {
  margin: 0.33rem 0 0;
  font-size: 0.82rem;
  color: #33566d;
}

.section {
  margin-top: 1.25rem;
  padding: 1.45rem;
}

.section-head h2 {
  margin: 0;
  font-family: "Orbitron", sans-serif;
  font-size: 1.35rem;
}

.section-head p {
  margin: 0.35rem 0 0.9rem;
  color: var(--muted);
}

.strength-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.strength-card {
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid rgba(15, 107, 143, 0.17);
  background: #f7fbfd;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.strength-card h3 {
  margin: 0;
  font-size: 1rem;
}

.strength-card p {
  margin: 0.55rem 0 0;
  color: #2f5369;
  font-size: 0.9rem;
}

.strength-card.active,
.strength-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 10px 22px rgba(15, 107, 143, 0.12);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 0.95rem;
}

.filter-btn {
  border: 1px solid rgba(15, 107, 143, 0.34);
  background: #f4fbff;
  color: #1b4d67;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.filter-btn.active {
  background: linear-gradient(120deg, var(--primary), #0f8c8f);
  color: #fff;
}

.timeline-list {
  display: grid;
  gap: 0.85rem;
}

.timeline-item {
  border-left: 4px solid var(--accent);
  padding: 0.85rem 0.9rem;
  background: #fbfeff;
  border-radius: 0 12px 12px 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.timeline-item.hidden {
  display: none;
}

.timeline-item:hover {
  transform: translateX(2px);
  box-shadow: 0 8px 18px rgba(33, 93, 125, 0.1);
}

.timeline-item h3 {
  margin: 0;
  font-size: 1rem;
}

.timeline-item p {
  margin: 0.2rem 0 0.4rem;
  color: #3d6073;
  font-size: 0.86rem;
}

.timeline-item ul {
  margin: 0;
  padding-left: 1.1rem;
}

.timeline-item li {
  margin: 0.2rem 0;
  color: #26465a;
}

.project-list details {
  border: 1px solid rgba(15, 107, 143, 0.18);
  background: #f7fcfd;
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
}

.project-list details + details {
  margin-top: 0.7rem;
}

.project-list summary {
  cursor: pointer;
  color: #12597b;
  font-weight: 700;
}

.project-list p {
  margin: 0.55rem 0 0;
  color: #2b4d61;
}

.contact {
  background: linear-gradient(145deg, #ebf8ff, #ecfff8);
}

.contact-panel {
  padding: 1rem;
}

.contact-panel p {
  margin: 0.35rem 0;
}

.contact-panel a {
  color: #095777;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .main-nav {
    display: none;
  }
}

@media (max-width: 640px) {
  main {
    width: 94vw;
  }

  .site-header {
    padding: 0.8rem 3vw;
  }

  .hero-content,
  .section {
    padding: 1rem;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 0.85rem;
  }

  .strength-grid {
    grid-template-columns: 1fr;
  }

  .hero-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
  }

  .avatar img {
    width: 100px;
    height: 100px;
  }
}