:root {
  --bg0: #f8f9fa;
  --bg1: #ffffff;

  --ink: #1a1a2e;
  --muted: #4a5568;
  --soft: #718096;
  --line: rgba(0, 0, 0, 0.1);

  --card: rgba(255, 255, 255, 0.88);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 6px 24px rgba(0, 0, 0, 0.06);

  --accent: #1a5276;
  --accent-weak: rgba(26, 82, 118, 0.1);
  --accent-warm: #c0392b;

  --radius: 10px;
  --max: 1080px;
  --side: 300px;

  --font-ui: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  --font-body: "IBM Plex Sans", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14px;
  background: var(--bg0);
}

a {
  color: var(--accent);
  text-decoration-color: rgba(26, 82, 118, 0.3);
  text-underline-offset: 3px;
}

a:hover {
  color: #0e3a54;
  text-decoration-color: rgba(26, 82, 118, 0.5);
}

strong {
  font-weight: 700;
}

.skip-link {
  position: absolute;
  left: 10px;
  top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  font-family: var(--font-ui);
  transform: translateY(-140%);
  transition: transform 160ms ease;
  z-index: 999;
}

.skip-link:focus {
  transform: translateY(0);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
  background: rgba(248, 249, 250, 0.85);
  border-bottom: 1px solid var(--line);
}

.topbar__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  gap: 14px;
  align-items: center;
  position: relative;
}

.brand {
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-ui);
  font-weight: 600;
  letter-spacing: 0.2px;
}

.brand__name {
  display: inline-block;
  padding: 8px 10px;
  border-radius: 999px;
}

.brand:hover .brand__name {
  background: rgba(26, 82, 118, 0.06);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  font-family: var(--font-ui);
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle__icon {
  width: 18px;
  height: 12px;
  display: inline-block;
  background:
    linear-gradient(var(--ink), var(--ink)) 0 0 / 100% 2px no-repeat,
    linear-gradient(var(--ink), var(--ink)) 0 50% / 100% 2px no-repeat,
    linear-gradient(var(--ink), var(--ink)) 0 100% / 100% 2px no-repeat;
  opacity: 0.85;
}

.nav {
  margin-left: auto;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  align-items: center;
}

.nav a {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  padding: 7px 9px;
  border-radius: 999px;
}

.nav a:hover {
  background: rgba(26, 82, 118, 0.06);
  color: #0e3a54;
}

.nav a[aria-current="page"] {
  background: rgba(26, 82, 118, 0.1);
  color: var(--ink);
}

.main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 16px 64px;
  display: grid;
  grid-template-columns: var(--side) 1fr;
  gap: 22px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 78px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.profile {
  padding: 18px 18px 16px;
}

.avatar {
  display: block;
  width: 120px;
  height: 120px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.75);
}

.profile__title {
  margin-top: 12px;
}

.profile__name {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 1.35rem;
  line-height: 1.15;
}

.profile__name-zh {
  display: inline-block;
  margin-left: 10px;
  font-family: "Noto Sans SC", var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--soft);
  letter-spacing: 0.3px;
}

.profile__subtitle {
  margin: 6px 0 0;
  font-family: var(--font-ui);
  color: var(--muted);
  font-size: 0.85rem;
}

.quicklinks {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(16, 24, 40, 0.14);
  background: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: 0.82rem;
}

.pill:hover {
  border-color: rgba(26, 82, 118, 0.2);
  background: rgba(26, 82, 118, 0.05);
}

.pill__icon {
  width: 1.15em;
  text-align: center;
  opacity: 0.9;
}

.meta {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(16, 24, 40, 0.18);
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 8px 8px;
  font-family: var(--font-ui);
  font-size: 0.83rem;
}

.meta dt {
  color: var(--soft);
}

.meta dd {
  margin: 0;
  color: var(--ink);
  word-break: break-word;
}

.counter {
  margin-top: 14px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(16, 24, 40, 0.12);
  background: rgba(255, 255, 255, 0.55);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--font-ui);
  color: var(--muted);
  font-size: 0.92rem;
}

.counter__item span {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--ink);
}

.profile__note {
  margin: 14px 0 0;
  font-family: var(--font-ui);
  color: var(--soft);
  font-size: 0.92rem;
}

.content {
  min-width: 0;
}

.section {
  padding: 18px 18px 16px;
  scroll-margin-top: 92px;
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.section__header h2 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 1.1rem;
  letter-spacing: 0.2px;
}

.section__kicker {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--soft);
  font-size: 0.85rem;
}

.section p {
  margin: 0 0 10px;
  color: var(--ink);
  line-height: 1.65;
  font-size: 0.93rem;
}

.callout {
  margin-top: 12px;
  padding: 14px 14px;
  border-radius: 16px;
  border: 1px solid rgba(208, 74, 2, 0.25);
  background: rgba(208, 74, 2, 0.065);
  font-family: var(--font-ui);
}

.callout__title {
  font-weight: 700;
  color: #7a2e00;
  letter-spacing: 0.2px;
}

.callout__body {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.55;
}

.clean-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.clean-list li {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.date {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.83rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  min-width: 60px;
}

.item {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--muted);
}

.clean-list li.highlight {
  border-color: rgba(202, 138, 4, 0.4);
  background: rgba(234, 179, 8, 0.08);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 7px;
  border-radius: 999px;
  border: 1px solid rgba(16, 24, 40, 0.14);
  background: rgba(255, 255, 255, 0.65);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.1px;
  line-height: 1;
}

.tag.iclr {
  border-color: rgba(180, 60, 0, 0.25);
  background: rgba(180, 60, 0, 0.08);
  color: #7a2e00;
}

.tag.neurips {
  border-color: rgba(180, 60, 0, 0.25);
  background: rgba(180, 60, 0, 0.08);
  color: #7a2e00;
}

.tag.spotlight {
  border-color: rgba(147, 51, 234, 0.28);
  background: rgba(147, 51, 234, 0.10);
  color: #4c1d95;
}

.tag.oral {
  border-color: rgba(147, 51, 234, 0.28);
  background: rgba(147, 51, 234, 0.10);
  color: #4c1d95;
}

.tag.conf {
  border-color: rgba(180, 60, 0, 0.25);
  background: rgba(180, 60, 0, 0.08);
  color: #7a2e00;
}

.tag.work {
  border-color: rgba(16, 185, 129, 0.30);
  background: rgba(16, 185, 129, 0.10);
  color: #065f46;
}

.tag.preprint {
  border-color: rgba(2, 132, 199, 0.30);
  background: rgba(2, 132, 199, 0.10);
  color: #0c4a6e;
}

.tag.oss {
  border-color: rgba(30, 64, 175, 0.26);
  background: rgba(30, 64, 175, 0.10);
  color: #1e3a8a;
}

.tag.accept {
  border-color: rgba(22, 163, 74, 0.28);
  background: rgba(22, 163, 74, 0.10);
  color: #14532d;
}

.tag.tech {
  border-color: rgba(148, 163, 184, 0.45);
  background: rgba(148, 163, 184, 0.16);
  color: #334155;
}

.tag.rep {
  border-color: rgba(202, 138, 4, 0.5);
  background: rgba(234, 179, 8, 0.22);
  color: #854d0e;
}

.pub-list {
  margin: 0;
  padding-left: 1.15em;
}

.pub-list > li {
  margin: 0 0 14px;
  padding: 8px 10px;
  border-radius: 8px;
  transition: background 150ms ease;
}

.pub-list > li:hover {
  background: rgba(0, 0, 0, 0.02);
}

.pub__row {
  display: flex;
  gap: 12px;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
}

.pub__title {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
}

.pub__meta {
  margin-top: 4px;
  font-family: var(--font-ui);
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.5;
}

.pub__links {
  margin-top: 4px;
  font-family: var(--font-ui);
  color: var(--soft);
  font-size: 0.83rem;
}

.sep {
  opacity: 0.55;
  margin: 0 6px;
}

.muted {
  color: var(--soft);
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline__item {
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 12px;
  align-items: start;
}

.timeline__when {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 0.83rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.timeline__title {
  font-family: var(--font-ui);
  font-size: 0.88rem;
  color: var(--ink);
}

.timeline__desc {
  margin-top: 4px;
  font-family: var(--font-ui);
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.5;
}

.edu {
  display: grid;
  gap: 14px;
}

.edu__item {
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.edu__title {
  font-family: var(--font-ui);
  font-size: 0.88rem;
  color: var(--ink);
}

.edu__meta {
  margin-top: 3px;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--soft);
  font-variant-numeric: tabular-nums;
}

.edu__desc {
  margin-top: 6px;
  font-family: var(--font-ui);
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.5;
}

.footer {
  margin-top: 18px;
  padding: 18px 16px;
}

.footer__inner {
  font-family: var(--font-ui);
  color: var(--soft);
  font-size: 0.82rem;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 940px) {
  .main {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

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

@media (max-width: 740px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    right: 16px;
    top: calc(100% + 10px);
    width: min(360px, calc(100vw - 32px));
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 18px 55px rgba(16, 24, 40, 0.18);
  }

  .nav.is-open {
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-items: stretch;
  }

  .nav a {
    padding: 10px 12px;
  }

  .date {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}