@charset "utf-8";

/* ==========================================================================
   Design system — academic homepage
   Ink-on-paper palette, serif display headings, single restrained accent.
   ========================================================================== */

:root {
  --bg: #f6f4f0;
  --bg-soft: #eeeae3;
  --surface: #ffffff;
  --surface-soft: #fbfaf8;
  --text: #1d2228;
  --text-strong: #10141a;
  --muted: #5d6773;
  --faint: #8a939e;
  --border: rgba(29, 34, 40, 0.12);
  --border-soft: rgba(29, 34, 40, 0.07);
  --primary: #1b4965;
  --primary-hover: #12354c;
  --primary-soft: rgba(27, 73, 101, 0.09);
  --accent: #b3622f;
  --accent-soft: rgba(179, 98, 47, 0.12);
  --shadow-sm: 0 1px 2px rgba(20, 26, 35, 0.05), 0 2px 8px rgba(20, 26, 35, 0.05);
  --shadow-md: 0 2px 6px rgba(20, 26, 35, 0.06), 0 10px 28px rgba(20, 26, 35, 0.08);
  --nav-bg: rgba(246, 244, 240, 0.82);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --font-serif: "Source Serif 4", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 940px;
}

html[data-theme="dark"] {
  --bg: #12161b;
  --bg-soft: #171c23;
  --surface: #1a2028;
  --surface-soft: #1e252e;
  --text: #dfe5ec;
  --text-strong: #f1f5f9;
  --muted: #9aa5b1;
  --faint: #76818e;
  --border: rgba(223, 229, 236, 0.14);
  --border-soft: rgba(223, 229, 236, 0.08);
  --primary: #7fb2d1;
  --primary-hover: #a8cde3;
  --primary-soft: rgba(127, 178, 209, 0.14);
  --accent: #dc9a6b;
  --accent-soft: rgba(220, 154, 107, 0.16);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.28);
  --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.34), 0 10px 28px rgba(0, 0, 0, 0.4);
  --nav-bg: rgba(18, 22, 27, 0.86);
}

/* --------------------------------------------------------------------------
   Reset & base
   -------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body.site {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.site img {
  max-width: 100%;
  height: auto;
}

body.site a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease;
}

body.site a:hover {
  color: var(--primary-hover);
}

body.site a.underline {
  border-bottom: 1px solid var(--primary-soft);
}

body.site a.underline:hover {
  border-bottom-color: currentColor;
}

body.site p {
  margin: 0 0 0.9em;
}

body.site hr {
  border: 0;
  border-top: 1px solid var(--border-soft);
  margin: 1.75rem 0;
}

body.site ul,
body.site ol {
  padding-left: 1.2rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 2000;
  background: var(--surface);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.site-nav__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 58px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav__brand {
  font-family: var(--font-serif);
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-strong);
  white-space: nowrap;
}

.site-nav__brand:hover {
  color: var(--accent);
}

.site-nav__brand .zh {
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.35rem;
  font-size: 0.95em;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: auto;
  list-style: none;
  padding: 0;
}

.site-nav__links a {
  display: block;
  padding: 0.38rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
}

.site-nav__links a:hover {
  color: var(--text-strong);
  background: var(--primary-soft);
}

.site-nav__links a.is-active {
  color: var(--primary);
  background: var(--primary-soft);
}

.site-nav__toggle,
.theme-toggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all 0.16s ease;
}

.site-nav__toggle:hover,
.theme-toggle:hover {
  color: var(--text-strong);
  border-color: var(--primary);
}

.theme-toggle {
  margin-left: 0.6rem;
}

.site-nav__toggle {
  display: none;
}

html[data-theme="dark"] .theme-toggle .fa-moon,
html:not([data-theme="dark"]) .theme-toggle .fa-sun {
  display: none;
}

/* --------------------------------------------------------------------------
   Layout primitives
   -------------------------------------------------------------------------- */

.site-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 2.25rem 1.25rem 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.section {
  margin: 1.6rem 0;
}

.section > .card {
  padding: 1.6rem 1.75rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 600;
  letter-spacing: 0.005em;
  color: var(--text-strong);
  margin: 0 0 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
}

.section-title i {
  font-size: 0.82em;
  color: var(--accent);
}

.section-title .count {
  margin-left: auto;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.subsection-title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-strong);
  margin: 1.75rem 0 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subsection-title::before {
  content: "";
  width: 3px;
  height: 1em;
  border-radius: 2px;
  background: var(--accent);
}

.subsection-title:first-child {
  margin-top: 0;
}

.page-header {
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.35rem;
  color: var(--text-strong);
}

.page-header p {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0;
  max-width: 62ch;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
}

.note {
  font-size: 0.83rem;
  color: var(--faint);
  margin: 1rem 0 0;
}

/* --------------------------------------------------------------------------
   Profile hero
   -------------------------------------------------------------------------- */

.profile {
  padding: 2rem 1.9rem;
}

.profile__top {
  display: flex;
  align-items: flex-start;
  gap: 1.75rem;
}

.profile__body {
  min-width: 0;
  flex: 1;
}

.profile__photo {
  flex: 0 0 168px;
  width: 168px;
}

.profile__photo img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
}

.profile__name {
  font-family: var(--font-serif);
  font-size: 2.15rem;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--text-strong);
}

.profile__name .zh {
  font-size: 0.62em;
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.5rem;
  letter-spacing: 0.04em;
}

.profile__role {
  margin: 0.5rem 0 0;
  font-size: 0.96rem;
  color: var(--muted);
}

.profile__role strong {
  color: var(--text);
  font-weight: 600;
}

.profile__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--faint);
}

.profile__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.profile__bio {
  margin-top: 1.1rem;
  font-size: 0.96rem;
  line-height: 1.72;
  color: var(--text);
}

.profile__bio p:last-child {
  margin-bottom: 0;
}

.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.1rem;
  padding: 0;
  list-style: none;
}

.interests li {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-soft);
}

.contact-row a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.34rem 0.8rem;
  background: var(--surface-soft);
}

.contact-row a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-soft);
}

.contact-row a i {
  font-size: 0.95em;
}

/* --------------------------------------------------------------------------
   News
   -------------------------------------------------------------------------- */

.news {
  max-height: 340px;
  overflow-y: auto;
  padding-right: 0.4rem;
  margin: 0;
  list-style: none;
  padding-left: 0;
  scrollbar-width: thin;
}

.news::-webkit-scrollbar {
  width: 6px;
}

.news::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}

.news li {
  display: grid;
  grid-template-columns: 6.1rem 1fr;
  gap: 0 0.9rem;
  padding: 0.62rem 0;
  border-bottom: 1px dashed var(--border-soft);
  font-size: 0.9rem;
}

.news li:last-child {
  border-bottom: 0;
}

.news__date {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--faint);
  padding-top: 0.2rem;
  white-space: nowrap;
}

.news__text {
  color: var(--text);
  min-width: 0;
}

.news__text em {
  color: var(--muted);
}

.news__text strong {
  color: var(--text-strong);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Timeline entries (education / experience)
   -------------------------------------------------------------------------- */

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

.entries > li {
  position: relative;
  padding: 0 0 1.1rem 1.15rem;
  border-left: 1px solid var(--border);
}

.entries > li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.entries > li::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.52rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
}

.entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.1rem 0.75rem;
}

.entry__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-strong);
}

.entry__date {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--faint);
  white-space: nowrap;
}

.entry__org {
  font-size: 0.89rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.entry__detail {
  font-size: 0.85rem;
  color: var(--faint);
  margin-top: 0.22rem;
}

.entry__detail a {
  color: var(--primary);
}

/* Plain definition-style list (awards, services) */
.facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.facts li {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-soft);
  font-size: 0.9rem;
}

.facts li:last-child {
  border-bottom: 0;
}

.facts__label {
  color: var(--text);
  min-width: 0;
}

.facts__year {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--faint);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Publications
   -------------------------------------------------------------------------- */

.pubs {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pub;
}

.pub {
  display: flex;
  gap: 1.25rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--border-soft);
}

.pub:first-child {
  padding-top: 0.25rem;
}

.pub:last-child {
  border-bottom: 0;
  padding-bottom: 0.25rem;
}

.pub__thumb {
  flex: 0 0 168px;
  width: 168px;
  height: 100px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  overflow: hidden;
  background: var(--surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pub__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.35s ease;
}

.pub:hover .pub__thumb img {
  transform: scale(1.04);
}

.pub__thumb--empty {
  background:
    linear-gradient(135deg, var(--primary-soft) 0%, var(--accent-soft) 100%);
}

.pub__thumb--empty span {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-align: center;
  padding: 0 0.6rem;
  line-height: 1.3;
}

.pub__body {
  flex: 1;
  min-width: 0;
}

.pub__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.4rem;
}

.tag {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 0.14rem 0.45rem;
  white-space: nowrap;
}

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

.pub__title {
  font-family: var(--font-serif);
  font-size: 1.03rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-strong);
  margin: 0 0 0.3rem;
}

.pub__authors {
  font-size: 0.855rem;
  color: var(--muted);
  line-height: 1.55;
  margin: 0 0 0.25rem;
}

.pub__authors strong {
  color: var(--text-strong);
  font-weight: 600;
}

.pub__venue {
  font-size: 0.855rem;
  color: var(--text);
  margin: 0;
}

.pub__venue em {
  color: var(--muted);
}

.pub__venue .year {
  font-weight: 600;
}

.pub__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.status {
  font-size: 0.71rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  padding: 0.16rem 0.48rem;
  white-space: nowrap;
  border: 1px solid transparent;
}

.status--rank {
  color: var(--primary);
  background: var(--primary-soft);
}

.status--review {
  color: var(--accent);
  background: transparent;
  border-color: var(--accent-soft);
}

.status--metric {
  color: var(--faint);
  background: var(--bg-soft);
  font-weight: 500;
}

.pub__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.pub__links a {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  font-size: 0.765rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.62rem;
  background: var(--surface-soft);
}

.pub__links a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-soft);
}

/* Compact variant used for conference proceedings / talks */
.pubs--compact .pub {
  display: block;
  padding: 0.7rem 0;
}

.pubs--compact .pub__title {
  font-size: 0.95rem;
  font-weight: 600;
  display: inline;
  font-family: var(--font-sans);
}

/* --------------------------------------------------------------------------
   Generic listing cards (projects, patents)
   -------------------------------------------------------------------------- */

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

.blocks > li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-soft);
}

.blocks > li:first-child {
  padding-top: 0;
}

.blocks > li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.block__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-strong);
  margin: 0 0 0.2rem;
  line-height: 1.45;
}

.block__sub {
  font-size: 0.87rem;
  color: var(--muted);
  margin: 0;
}

.block__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin-top: 0.4rem;
  font-size: 0.79rem;
  color: var(--faint);
}

.block__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.role {
  font-size: 0.71rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 0.14rem 0.45rem;
  margin-right: 0.5rem;
  vertical-align: 0.08em;
}

/* --------------------------------------------------------------------------
   Research themes
   -------------------------------------------------------------------------- */

.themes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.theme {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem;
  background: var(--surface-soft);
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.theme:hover {
  border-color: var(--border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.theme__icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.theme h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  color: var(--text-strong);
}

.theme p {
  font-size: 0.865rem;
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Buttons / links row
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn:hover {
  background: var(--primary);
  color: var(--bg);
}

.more-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.1rem;
  font-size: 0.865rem;
  font-weight: 600;
  color: var(--primary);
}

.more-link i {
  font-size: 0.8em;
  transition: transform 0.18s ease;
}

.more-link:hover i {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   Prose (markdown article bodies)
   -------------------------------------------------------------------------- */

.prose {
  padding: 1.75rem 1.9rem;
  font-size: 0.975rem;
  line-height: 1.78;
}

.prose > *:first-child {
  margin-top: 0;
}

.prose > *:last-child {
  margin-bottom: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.3;
  margin: 1.8rem 0 0.7rem;
}

.prose h1 { font-size: 1.5rem; }
.prose h2 { font-size: 1.25rem; }
.prose h3 { font-size: 1.08rem; }
.prose h4 { font-size: 0.98rem; }

.prose a {
  border-bottom: 1px solid var(--primary-soft);
}

.prose a:hover {
  border-bottom-color: currentColor;
}

.prose ul,
.prose ol {
  margin: 0 0 0.95em;
}

.prose li + li {
  margin-top: 0.25em;
}

.prose blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.35em;
}

.prose pre {
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}

.prose pre code {
  background: none;
  padding: 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1.2rem 0;
}

.prose th,
.prose td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--border-soft);
}

.prose th {
  font-weight: 600;
  color: var(--text-strong);
  border-bottom-color: var(--border);
}

.prose img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  max-width: var(--wrap);
  margin: 2rem auto 0;
  padding: 1.5rem 1.25rem 2.5rem;
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
  align-items: center;
  font-size: 0.8rem;
  color: var(--faint);
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--primary);
}

.site-footer__right {
  margin-left: auto;
  display: flex;
  gap: 1rem;
}

/* --------------------------------------------------------------------------
   Reveal on scroll
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

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

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

  .pub:hover .pub__thumb img,
  .theme:hover {
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 860px) {
  .grid-2,
  .themes {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .site-nav__inner {
    height: 54px;
    flex-wrap: wrap;
  }

  .site-nav__toggle {
    display: inline-flex;
    order: 2;
    margin-left: 0.5rem;
  }

  .theme-toggle {
    order: 2;
    margin-left: auto;
  }

  .site-nav__links {
    order: 3;
    width: 100%;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-top: 1px solid var(--border-soft);
    padding-bottom: 0.5rem;
    display: none;
  }

  .site-nav.is-open .site-nav__links {
    display: flex;
  }

  .site-nav__links a {
    padding: 0.6rem 0.4rem;
  }

  .site-main {
    padding: 1.5rem 1rem 0.5rem;
  }

  .section > .card,
  .profile {
    padding: 1.25rem 1.1rem;
  }

  /* Column flex on the cross axis must stretch, otherwise the text block is
     sized to its max-content width and the card overflows horizontally. */
  .profile__top {
    flex-direction: column-reverse;
    align-items: stretch;
    gap: 1.1rem;
  }

  .profile__photo {
    flex: 0 0 auto;
    align-self: flex-start;
    width: 118px;
  }

  .profile__name {
    font-size: 1.7rem;
  }

  .profile__name .zh {
    display: block;
    margin: 0.2rem 0 0;
  }

  .page-header h1 {
    font-size: 1.6rem;
  }

  .pub {
    flex-direction: column;
    gap: 0.8rem;
  }

  .pub__thumb {
    flex: none;
    width: 100%;
    height: 150px;
  }

  .news li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.15rem;
  }

  .entry__head {
    flex-wrap: wrap;
  }

  .entry__date {
    margin-left: 0;
    width: 100%;
    order: 3;
  }
}

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */

@media print {
  .site-nav,
  .site-footer,
  .theme-toggle {
    display: none !important;
  }

  body.site {
    background: #fff;
  }

  .card {
    box-shadow: none;
    border-color: #ddd;
  }
}