:root {
  color-scheme: dark;
  --bg: #070807;
  --ink: #f7f3e8;
  --muted: #b5b8ad;
  --line: rgba(247, 243, 232, 0.16);
  --paper: #f3efe3;
  --paper-ink: #111510;
  --paper-muted: #545c52;
  --green: #a8ff45;
  --cyan: #40e8ff;
  --red: #ff5b66;
  --yellow: #ffd84d;
  --blue: #66a6ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 0%, rgba(168, 255, 69, 0.14), transparent 30rem),
    radial-gradient(circle at 88% 12%, rgba(64, 232, 255, 0.11), transparent 34rem),
    var(--bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(247, 243, 232, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 243, 232, 0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 88%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green), var(--cyan), var(--yellow), var(--red));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1160px, calc(100% - 32px));
  height: 72px;
  margin: 0 auto;
  backdrop-filter: blur(18px);
}

.brand,
.site-nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: #0c100a;
  background: var(--green);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  box-shadow: 6px 6px 0 rgba(64, 232, 255, 0.7);
}

.site-nav {
  gap: 8px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(7, 8, 7, 0.66);
}

.lang-toggle {
  min-height: 38px;
  padding: 7px 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition:
    color 160ms ease,
    background 160ms ease,
    border-color 160ms ease;
}

.lang-toggle:hover {
  color: #ffffff;
  border-color: var(--green);
  background: var(--green);
}

.site-nav a {
  min-width: 56px;
  padding: 7px 12px;
  color: var(--muted);
  border-radius: 6px;
  font-size: 14px;
  text-align: center;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--ink);
  background: rgba(247, 243, 232, 0.1);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: clamp(32px, 6vw, 96px);
  width: min(1160px, calc(100% - 32px));
  min-height: calc(86vh - 72px);
  margin: 0 auto;
  padding: 64px 0 56px;
}

.hero-copy {
  max-width: 700px;
}

.eyebrow,
.section-kicker,
.research-label {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(72px, 12vw, 164px);
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-role {
  width: fit-content;
  margin: 18px 0 0;
  padding: 6px 10px;
  color: #10150d;
  background: var(--yellow);
  border-radius: 6px;
  font-size: clamp(18px, 2.2vw, 27px);
  font-weight: 900;
  box-shadow: 8px 8px 0 rgba(255, 91, 102, 0.72);
}

.hero-summary {
  max-width: 640px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 12px 17px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease;
}

.action:hover {
  transform: translateY(-2px);
}

.action.primary {
  color: #06100a;
  background: var(--green);
  box-shadow: 9px 9px 0 rgba(64, 232, 255, 0.44);
}

.action.secondary {
  background: rgba(247, 243, 232, 0.06);
}

.action-icon {
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border-radius: 50%;
  background: rgba(7, 8, 7, 0.14);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  display: grid;
  min-height: min(420px, 60vw);
  place-items: center;
}

.portrait-frame {
  position: relative;
  width: min(220px, 54vw);
  aspect-ratio: 0.82;
  overflow: hidden;
  border: 1px solid rgba(247, 243, 232, 0.26);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(168, 255, 69, 0.9), transparent 34%),
    linear-gradient(315deg, rgba(64, 232, 255, 0.85), transparent 36%),
    #111510;
  box-shadow: var(--shadow), 10px 10px 0 rgba(255, 216, 77, 0.84);
  transition:
    width 180ms ease,
    aspect-ratio 180ms ease,
    border-radius 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}

.portrait-frame::before {
  position: absolute;
  inset: 14px;
  z-index: 2;
  border: 1px solid rgba(247, 243, 232, 0.25);
  border-radius: 6px;
  content: "";
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 18%;
  filter: saturate(1.04) contrast(1.02);
  transition: filter 180ms ease;
}

.orbit-tag {
  position: absolute;
  display: grid;
  min-width: 86px;
  min-height: 42px;
  place-items: center;
  padding: 7px 12px;
  color: #080b07;
  border: 1px solid rgba(7, 8, 7, 0.24);
  border-radius: 8px;
  font-weight: 900;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.42);
  animation: float 4.8s ease-in-out infinite;
}

.tag-a {
  top: 13%;
  left: -2%;
  background: var(--cyan);
}

.tag-b {
  top: 8%;
  right: 8%;
  background: var(--red);
  animation-delay: -1.2s;
}

.tag-c {
  right: 0;
  bottom: 21%;
  background: var(--green);
  animation-delay: -2.2s;
}

.tag-d {
  bottom: 12%;
  left: 5%;
  background: var(--yellow);
  animation-delay: -3.2s;
}

.tag-e {
  right: 11%;
  bottom: 6%;
  background: var(--blue);
  animation-delay: -4s;
}

.impact-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.impact-item {
  min-height: 118px;
  padding: 20px;
  background: rgba(7, 8, 7, 0.78);
}

.impact-item strong {
  display: block;
  color: var(--green);
  font-size: 32px;
  line-height: 1.06;
  overflow-wrap: anywhere;
}

.impact-item span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(76px, 10vw, 128px) 0;
}

.section-light {
  color: var(--paper-ink);
  background: var(--paper);
}

.section-dark {
  background:
    linear-gradient(90deg, rgba(255, 91, 102, 0.08), transparent 28%),
    linear-gradient(270deg, rgba(64, 232, 255, 0.08), transparent 26%),
    #0b0d0a;
}

.section-heading,
.profile-grid,
.timeline,
.stack-board,
.research-grid,
.site-footer {
  width: min(1160px, calc(100% - 32px));
  margin-right: auto;
  margin-left: auto;
}

.section-light .section-kicker {
  color: #336400;
}

.section-heading {
  display: grid;
  grid-template-columns: 0.36fr 0.64fr;
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
}

.section-heading h2 {
  max-width: 790px;
  margin: 0;
  font-size: clamp(34px, 5vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.profile-card,
.research-card {
  position: relative;
  min-height: 300px;
  padding: 22px;
  border: 1px solid rgba(17, 21, 16, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.55);
  overflow: hidden;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.profile-card:hover,
.research-card:hover {
  transform: translateY(-4px);
  box-shadow: 12px 12px 0 rgba(17, 21, 16, 0.14);
}

.profile-card::after {
  position: absolute;
  right: -46px;
  bottom: -46px;
  width: 120px;
  height: 120px;
  border: 24px solid rgba(17, 21, 16, 0.07);
  border-radius: 50%;
  content: "";
}

.card-index {
  color: #53614c;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-weight: 800;
}

.profile-card h3,
.timeline-content h3,
.research-card h3 {
  margin: 20px 0 12px;
  font-size: 23px;
  line-height: 1.18;
}

.profile-card p,
.timeline-content p,
.research-card p {
  margin: 0;
  color: var(--paper-muted);
}

.timeline {
  position: relative;
  display: grid;
  gap: 20px;
}

.timeline::before {
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 178px;
  width: 1px;
  background: linear-gradient(var(--green), var(--cyan), var(--yellow));
  content: "";
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 34px;
}

.timeline-date {
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-weight: 900;
}

.timeline-content {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(247, 243, 232, 0.06);
}

.timeline-content::before {
  position: absolute;
  top: 26px;
  left: -43px;
  width: 17px;
  height: 17px;
  border: 3px solid #0b0d0a;
  border-radius: 50%;
  background: var(--green);
  content: "";
}

.timeline-content h3,
.research-card h3 {
  color: var(--ink);
}

.timeline-content p,
.detail-list {
  color: var(--muted);
}

.detail-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding-left: 18px;
}

.stack-board {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.stack-board span {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 13px;
  color: var(--paper-ink);
  border: 1px solid rgba(17, 21, 16, 0.2);
  border-radius: 8px;
  background: #fffdf3;
  font-weight: 800;
  box-shadow: 5px 5px 0 rgba(17, 21, 16, 0.09);
}

.stack-board span:nth-child(3n + 1) {
  background: #e9ffc7;
}

.stack-board span:nth-child(3n + 2) {
  background: #d9f9ff;
}

.stack-board span:nth-child(3n) {
  background: #fff0b2;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.subsection-title {
  width: min(1160px, calc(100% - 32px));
  margin: 46px auto 16px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.1;
}

.section-heading + .subsection-title {
  margin-top: 0;
}

.research-grid.single-row {
  grid-template-columns: minmax(0, 1fr);
}

.research-grid.compact-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-card {
  min-height: 250px;
  padding-bottom: 64px;
  border-color: var(--line);
  background: rgba(247, 243, 232, 0.065);
}

.research-card p {
  color: var(--muted);
}

.paper-title {
  font-family: Cambria, Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.22;
}

.paper-role {
  margin: 0 0 12px;
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  font-weight: 800;
}

.paper-summary {
  font-family: "Palatino Linotype", Palatino, Georgia, "Microsoft YaHei", serif;
  font-size: 15px;
  line-height: 1.72;
}

.research-card a {
  position: absolute;
  right: 18px;
  bottom: 18px;
  padding: 6px 10px;
  color: #06100a;
  border-radius: 6px;
  background: var(--ink);
  font-size: 13px;
  font-weight: 900;
}

.research-label {
  color: inherit;
}

.accent-green {
  color: var(--green);
}

.accent-blue {
  color: var(--blue);
}

.accent-red {
  color: var(--red);
}

.accent-yellow {
  color: var(--yellow);
}

.accent-ink {
  color: var(--ink);
}

.accent-cyan {
  color: var(--cyan);
}

body[data-site-style="formal"] {
  color-scheme: light;
  --bg: #f7f8fa;
  --ink: #172032;
  --muted: #596372;
  --line: rgba(23, 32, 50, 0.14);
  --paper: #ffffff;
  --paper-ink: #172032;
  --paper-muted: #626b78;
  --green: #2864d8;
  --cyan: #17798a;
  --red: #9d3848;
  --yellow: #a77917;
  --blue: #4556aa;
  --shadow: 0 14px 38px rgba(23, 32, 50, 0.08);
  color: var(--ink);
  background: #f7f8fa;
}

body[data-site-style="formal"]::before {
  display: none;
}

body[data-site-style="formal"] .site-header {
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

body[data-site-style="formal"] .site-nav {
  background: rgba(255, 255, 255, 0.86);
}

body[data-site-style="formal"] .site-nav a:hover,
body[data-site-style="formal"] .site-nav a.is-active {
  background: rgba(23, 32, 50, 0.08);
}

body[data-site-style="formal"] .hero h1 {
  font-size: clamp(64px, 9vw, 128px);
}

body[data-site-style="formal"] .hero-role,
body[data-site-style="formal"] .action.primary {
  box-shadow: none;
}

body[data-site-style="formal"] .hero-role {
  color: var(--ink);
  background: #e8edf5;
  border: 1px solid rgba(23, 32, 50, 0.1);
}

body[data-site-style="formal"] .action.primary {
  color: #ffffff;
  background: var(--green);
}

body[data-site-style="formal"] .portrait-frame {
  width: min(190px, 50vw);
  border-color: rgba(23, 32, 50, 0.18);
  border-radius: 4px;
  background: #ffffff;
  box-shadow: none;
}

body[data-site-style="formal"] .portrait-frame::before {
  inset: 0;
  border: 0;
}

body[data-site-style="formal"] .orbit-tag {
  color: var(--ink);
  border-color: rgba(23, 32, 50, 0.16);
  border-radius: 4px;
  background: #ffffff;
  box-shadow: none;
  animation: none;
}

body[data-site-style="formal"] .impact-strip {
  background: rgba(23, 32, 50, 0.12);
  box-shadow: none;
}

body[data-site-style="formal"] .impact-item {
  background: #ffffff;
}

body[data-site-style="formal"] .section-dark {
  color: var(--ink);
  background: #eef2f7;
}

body[data-site-style="formal"] .timeline-content,
body[data-site-style="formal"] .research-card {
  background: #ffffff;
  border-color: rgba(23, 32, 50, 0.12);
}

body[data-site-style="formal"] .timeline-content h3,
body[data-site-style="formal"] .research-card h3 {
  color: var(--ink);
}

body[data-site-style="formal"] .timeline-content p,
body[data-site-style="formal"] .detail-list,
body[data-site-style="formal"] .research-card p {
  color: var(--muted);
}

body[data-site-style="formal"] .research-card a {
  color: #ffffff;
  background: var(--green);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 26px 0 36px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@keyframes float {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -14px, 0);
  }
}

@media (max-width: 980px) {
  .site-header {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 0;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 34px;
  }

  .hero-visual {
    min-height: 430px;
  }

  .profile-grid,
  .research-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .impact-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .section-heading {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .site-header {
    align-items: flex-start;
  }

  .brand span:last-child {
    display: none;
  }

  .site-nav {
    flex: 1;
    width: auto;
    justify-content: space-between;
    overflow-x: auto;
  }

  .site-nav a {
    min-width: auto;
    white-space: nowrap;
  }

  .lang-toggle {
    min-height: 34px;
    padding: 6px 10px;
    font-size: 13px;
  }

  .hero h1 {
    font-size: clamp(68px, 22vw, 112px);
  }

  .hero-role {
    font-size: 18px;
  }

  .hero-visual {
    min-height: 360px;
  }

  .portrait-frame {
    width: min(210px, 60vw);
    box-shadow: 10px 10px 0 rgba(255, 216, 77, 0.84);
  }

  .orbit-tag {
    min-width: 68px;
    min-height: 36px;
    font-size: 13px;
    box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.42);
  }

  .impact-strip,
  .profile-grid,
  .research-grid,
  .research-grid.compact-row {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 8px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-left: 34px;
  }

  .timeline-content::before {
    left: -35px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

}