:root {
  --bg-main: #eceff3;
  --bg-panel: #f7f8fa;
  --text-main: #2c3139;
  --text-soft: #525d6b;
  --stroke: #d7dbe3;
  --accent: #286adf;
  --accent-2: #f0522a;
  --chip-bg: #e5edf8;
  --shadow: 0 14px 30px rgba(33, 45, 66, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at 20% 0%, #f7f9ff 0%, #edf0f3 45%, #e5e8ee 100%);
  line-height: 1.65;
  overflow-x: hidden;
}

#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(115deg, rgba(255, 255, 255, 0.6) 15%, rgba(255, 255, 255, 0) 70%),
    repeating-linear-gradient(90deg, rgba(80, 95, 126, 0.06) 0, rgba(80, 95, 126, 0.06) 1px, transparent 1px, transparent 40px);
  opacity: 0.4;
  z-index: 1;
}

.site-wrap {
  width: min(1140px, 94vw);
  margin: 32px auto;
  padding: 24px 28px 48px;
  background: var(--bg-panel);
  border: 1px solid #dfe3ea;
  box-shadow: var(--shadow);
  border-radius: 12px;
  position: relative;
  z-index: 2;
  animation: rise 600ms ease-out both;
}

.section-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 34px;
  align-items: center;
}

.avatar-wrap {
  display: flex;
  justify-content: center;
}

.avatar {
  width: 240px;
  height: 240px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
}

.name {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.tagline {
  margin: 10px 0 14px;
  color: var(--text-soft);
  font-size: 1.06rem;
}

.intro-paragraphs p {
  margin: 0 0 12px;
  font-size: 1.02rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  align-items: center;
}

.social-link {
  text-decoration: none;
  color: #1f4c94;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: transform 140ms ease, opacity 140ms ease;
}

.social-link:hover {
  transform: translateY(-2px);
  opacity: 0.82;
}

.social-icon {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #1f4c94;
}

.social-icon svg {
  width: 22px;
  height: 22px;
  display: block;
}

.content-section {
  margin-top: 34px;
  padding-top: 30px;
  border-top: 2px dashed var(--stroke);
}

.content-section h2 {
  margin: 0 0 14px;
  font-size: 2.05rem;
  font-weight: 800;
}

.news-list {
  display: grid;
  gap: 8px;
}

.news-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  align-items: start;
  gap: 5px;
}

.news-date {
  font-weight: 700;
  color: #1f2d45;
  font-family: "Manrope", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 1.2rem;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0;
}

.news-content {
  margin: 0;
}

.section-bullet-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.section-bullet-item {
  position: relative;
  padding-left: 22px;
  margin: 0 0 10px;
}

.preprint-item {
  margin: 0 0 18px;
}

.preprint-title-line {
  font-size: clamp(1.02rem, 1.25vw, 1.12rem);
  line-height: 1.42;
  margin: 0;
}

.preprint-arxiv-link {
  color: #4ca6c8;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 500;
}

.preprint-title-text {
  font-style: italic;
  font-weight: 700;
  color: #454b55;
}

.preprint-authors {
  margin-top: 4px;
  color: #4a5059;
  font-size: clamp(0.98rem, 1.08vw, 1.02rem);
  line-height: 1.5;
}

.section-bullet-item::before {
  content: "\00b7";
  position: absolute;
  left: 0;
  top: -1px;
  font-size: 2rem;
  line-height: 1;
  color: #3e4958;
}

.section-bullet-text {
  margin: 0;
}

.section-item-date {
  font-weight: 800;
  color: #1f2d45;
}

.section-item-date-suffix {
  font-weight: 600;
  font-style: italic;
  color: #4e5969;
}

.section-subpoint-list {
  margin: 6px 0 0 20px;
  padding-left: 18px;
}

.section-subpoint-item {
  margin: 0 0 2px;
}

.section-subpoint-text {
  margin: 0;
}

strong {
  font-weight: 800;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .section-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .intro-paragraphs {
    text-align: left;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .section-bullet-item {
    margin-bottom: 8px;
  }
}