:root {
  --ink: #20242a;
  --muted: #586270;
  --line: #e2e6ea;
  --link: #17619a;
  --paper: #fff;
  --content: 960px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.65 Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}
a { color: var(--link); text-underline-offset: 3px; }
a:hover, a:focus-visible { color: #0c426e; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(var(--content), calc(100% - 48px)); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.header-inner {
  width: min(var(--content), calc(100% - 48px));
  min-height: 60px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { color: var(--ink); text-decoration: none; font-size: 16px; font-weight: 700; white-space: nowrap; }
nav { display: flex; align-items: center; gap: 23px; margin-left: auto; }
nav a { color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 600; white-space: nowrap; }
.language-switch { display: flex; flex: none; gap: 2px; padding: 2px; border: 1px solid var(--line); border-radius: 5px; }
.language-switch button { min-width: 30px; height: 27px; border: 0; border-radius: 3px; background: transparent; color: var(--muted); font: inherit; font-size: 12px; cursor: pointer; }
.language-switch button.active { background: var(--ink); color: #fff; }

.intro { display: grid; grid-template-columns: 174px minmax(0, 1fr); gap: 36px; align-items: start; padding: 47px 0 33px; }
.portrait { display: block; width: 174px; height: 226px; object-fit: cover; object-position: top center; }
.intro-copy { min-width: 0; }
.affiliation { margin: 0 0 8px; color: var(--muted); font-size: 14px; font-weight: 600; }
h1, h2, h3, p { letter-spacing: 0; }
h1 { display: flex; align-items: baseline; flex-wrap: wrap; gap: 13px; margin: 0; font-size: 34px; line-height: 1.25; }
h1 small { color: var(--muted); font-size: 17px; font-weight: 450; }
.intro-bio { margin: 14px 0 0; color: var(--ink); font-size: 14px; }
.profile-links, .paper-links, .contact-links { display: flex; flex-wrap: wrap; gap: 7px 20px; }
.profile-links { margin-top: 15px; }
.profile-links a, .paper-links a, .contact-links a { font-size: 13px; font-weight: 600; }

.content-section { padding: 25px 0 9px; scroll-margin-top: 16px; }
.content-section h2 { margin: 0 0 12px; font-size: 21px; line-height: 1.35; }
.list-row { border-top: 1px solid var(--line); }

.publication { display: grid; grid-template-columns: 206px minmax(0, 1fr); gap: 22px; padding: 17px 0; }
.paper-image { display: block; width: 206px; height: 129px; border: 1px solid var(--line); background: #f6f8fa; }
.paper-image img { display: block; width: 100%; height: 100%; object-fit: contain; }
.paper-copy { min-width: 0; }
.paper-copy h3 { margin: 0 0 5px; font-size: 16px; line-height: 1.4; overflow-wrap: anywhere; }
.paper-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0 0 6px; color: var(--muted); font-size: 12px; }
.paper-copy > p:not(.paper-meta) { margin: 0 0 7px; color: var(--muted); font-size: 13px; line-height: 1.6; }

.experience { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 14px; padding: 17px 0; }
.company-mark { position: relative; display: block; width: 48px; height: 48px; overflow: hidden; }
.company-mark img { position: absolute; display: block; max-width: none; }
.bupt-mark img { top: 3px; left: 3px; width: 42px; height: 42px; object-fit: contain; }
.tencent-mark img { top: 3px; left: 0; width: auto; height: 42px; }
.kuaishou-mark img { top: 3px; left: 3px; width: 42px; height: 42px; }
.experience-heading { display: flex; align-items: baseline; gap: 8px 20px; }
.experience-heading h3 { margin: 0; font-size: 16px; }
.role { margin: 1px 0 7px; color: var(--muted); font-size: 13px; }

.contact { padding-bottom: 36px; }
.contact p { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
footer { display: flex; justify-content: space-between; gap: 12px; padding-block: 16px 25px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

@media (max-width: 700px) {
  .container, .header-inner { width: calc(100% - 36px); }
  .header-inner { display: grid; grid-template-columns: 1fr auto; gap: 0; padding-top: 9px; }
  .brand { grid-column: 1; grid-row: 1; }
  .language-switch { grid-column: 2; grid-row: 1; }
  nav { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; gap: 8px; width: 100%; margin: 7px 0 0; }
  nav a { padding: 7px 0 8px; font-size: 12px; }
  .intro { grid-template-columns: 112px minmax(0, 1fr); gap: 16px; padding: 29px 0 25px; }
  .portrait { grid-row: 1 / span 2; width: 112px; height: 163px; }
  .affiliation { font-size: 11px; line-height: 1.35; }
  h1 { display: block; font-size: 27px; }
  h1 small { display: block; margin-top: 1px; font-size: 12px; }
  .intro-bio, .profile-links { grid-column: 1 / -1; }
  .intro-copy { display: contents; }
  .intro-copy > .affiliation, .intro-copy > h1 { grid-column: 2; }
  .intro-copy > .affiliation { align-self: end; margin-bottom: -9px; }
  .intro-copy > h1 { align-self: start; }
  .intro-bio { margin-top: 1px; font-size: 13px; }
  .profile-links { margin: 2px 0 0; }
  .content-section { padding-top: 19px; }
  .content-section h2 { font-size: 19px; margin-bottom: 9px; }
  .publication { grid-template-columns: 104px minmax(0, 1fr); gap: 12px; padding: 15px 0; }
  .paper-image { grid-row: 1 / span 2; width: 104px; height: 79px; }
  .paper-copy h3 { font-size: 14px; }
  .paper-copy > p:not(.paper-meta), .paper-links { grid-column: 1 / -1; }
  .paper-copy { display: contents; }
  .paper-copy h3, .paper-copy .paper-meta { grid-column: 2; }
  .paper-copy h3 { align-self: end; margin: 0; }
  .paper-meta { align-self: start; margin: -8px 0 0; font-size: 11px; }
  .paper-copy > p:not(.paper-meta) { margin: 0; font-size: 12px; }
  .paper-links { gap: 6px 16px; }
  .paper-links a { font-size: 12px; }
  .experience { grid-template-columns: 40px minmax(0, 1fr); gap: 11px; }
  .company-mark { width: 40px; height: 40px; }
  .bupt-mark img { top: 2px; left: 2px; width: 36px; height: 36px; }
  .tencent-mark img { top: 2px; height: 36px; }
  .kuaishou-mark img { top: 2px; left: 2px; width: 36px; height: 36px; }
  .experience-heading { display: block; }
  .experience-heading h3 { font-size: 14px; }
  .role { font-size: 12px; }
  .contact-links a { font-size: 12px; }
}

@media (max-width: 360px) {
  .container, .header-inner { width: calc(100% - 28px); }
  nav a { font-size: 11px; }
  .intro { grid-template-columns: 100px minmax(0, 1fr); gap: 12px; }
  .portrait { width: 100px; height: 150px; }
  h1 { font-size: 25px; }
  .publication { grid-template-columns: 88px minmax(0, 1fr); gap: 10px; }
  .paper-image { width: 88px; height: 76px; }
}

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