:root {
  --font: Inter, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --bg: #f7f8fb;
  --bg-alt: #ffffff;
  --panel: #ffffff;
  --panel-soft: #f0f5fb;
  --ink: #111827;
  --muted: #667085;
  --line: rgba(17, 24, 39, 0.1);
  --accent: #2f6df6;
  --accent-light: #6aa8ff;
  --accent-2: #14b8a6;
  --gold: #f59e0b;
  --green: #10b981;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.1);
  --shadow-sm: 0 12px 32px rgba(15, 23, 42, 0.08);
  --container: 1120px;
  --radius: 22px;
  --radius-sm: 14px;
  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bg: #0f1319;
  --bg-alt: #151b24;
  --panel: #1b2230;
  --panel-soft: #222c3a;
  --ink: #eef4ff;
  --muted: #a6b2c3;
  --line: rgba(238, 244, 255, 0.12);
  --accent: #83b3ff;
  --accent-light: #9fc5ff;
  --accent-2: #67e0d4;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  --shadow-sm: 0 12px 32px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.65;
  margin: 0;
  overflow-x: hidden;
  transition: background-color 260ms ease, color 260ms ease;
}

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

button {
  font: inherit;
}

.container {
  margin: 0 auto;
  max-width: var(--container);
  padding: 0 24px;
  width: 100%;
}

.nav {
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg-alt) 82%, transparent);
  border-bottom: 1px solid var(--line);
  height: var(--nav-h);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  align-items: center;
  display: flex;
  height: 100%;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--container);
  padding: 0 24px;
}

.nav-logo {
  align-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 16px;
  color: #ffffff;
  display: inline-flex;
  font-weight: 900;
  height: 42px;
  justify-content: center;
  letter-spacing: 0;
  width: 42px;
}

.nav-panel,
.nav-links,
.nav-controls,
.hero-links,
.hero-actions,
.timeline-tags,
.tag-row,
.metric-row,
.skill-tags {
  align-items: center;
  display: flex;
}

.nav-panel {
  gap: 18px;
}

.nav-links {
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  border-radius: 999px;
  color: var(--muted);
  display: inline-flex;
  font-size: 14px;
  font-weight: 700;
  padding: 9px 12px;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--panel-soft);
  color: var(--accent);
}

.nav-links a.nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #ffffff;
  margin-left: 4px;
}

.nav-links a.nav-cta:hover,
.nav-links a.nav-cta.active {
  color: #ffffff;
}

.nav-controls {
  gap: 10px;
}

.control-btn,
.nav-toggle {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
  cursor: pointer;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.control-btn {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-size: 13px;
  font-weight: 850;
  height: 38px;
  justify-content: center;
  min-width: 42px;
  overflow: hidden;
  padding: 0 12px;
  position: relative;
}

.control-btn:hover,
.nav-toggle:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.theme-toggle {
  min-width: 38px;
  padding: 0;
  width: 38px;
}

.sun-icon,
.moon-icon {
  position: absolute;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}

[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: translateY(18px) rotate(35deg);
}

[data-theme="dark"] .moon-icon,
[data-theme="light"] .sun-icon {
  opacity: 1;
  transform: translateY(0) rotate(0);
}

.nav-toggle {
  border-radius: 12px;
  display: none;
  height: 42px;
  padding: 0;
  width: 42px;
}

.nav-toggle span {
  background: var(--ink);
  border-radius: 999px;
  display: block;
  height: 2px;
  margin: 5px auto;
  width: 18px;
}

.hero {
  align-items: center;
  display: flex;
  min-height: calc(100vh - var(--nav-h));
  overflow: hidden;
  padding: 74px 24px 96px;
  position: relative;
  text-align: center;
}

.hero-bg {
  inset: 0;
  pointer-events: none;
  position: absolute;
  z-index: 0;
}

.hero-grid-bg {
  background-image:
    linear-gradient(rgba(102, 112, 133, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 112, 133, 0.13) 1px, transparent 1px);
  background-size: 46px 46px;
  inset: 0;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.72), transparent 72%);
  position: absolute;
}

.hero-glow {
  border-radius: 999px;
  filter: blur(8px);
  opacity: 0.52;
  position: absolute;
}

.hero-glow-1 {
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 30%, transparent), transparent 70%);
  height: 560px;
  left: -150px;
  top: -140px;
  width: 560px;
}

.hero-glow-2 {
  background: radial-gradient(circle, color-mix(in srgb, var(--accent-2) 28%, transparent), transparent 70%);
  bottom: -150px;
  height: 520px;
  right: -140px;
  width: 520px;
}

.hero-content {
  margin: 0 auto;
  max-width: 920px;
  position: relative;
  z-index: 1;
}

.hero-profile {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-avatar {
  border: 7px solid var(--panel);
  border-radius: 50%;
  box-shadow: var(--shadow);
  height: 152px;
  object-fit: cover;
  width: 152px;
}

.hero-badge {
  background: color-mix(in srgb, var(--accent) 12%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  border-radius: 999px;
  color: var(--accent);
  display: inline-flex;
  font-size: 13px;
  font-weight: 850;
  margin-bottom: 14px;
  padding: 7px 13px;
}

.hero h1 {
  font-size: clamp(56px, 9vw, 110px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 0.9;
  margin: 0;
}

.hero-sub {
  color: var(--accent);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 850;
  letter-spacing: 0;
  margin: 20px auto 0;
}

.hero-desc {
  color: var(--muted);
  font-size: clamp(15px, 1.55vw, 18px);
  margin: 18px auto 0;
  max-width: min(1120px, calc(100vw - 40px));
}

.hero-desc .hero-desc-line {
  display: block;
}

.hero-desc .hero-desc-line:first-child {
  font-size: clamp(13px, 1.28vw, 18px);
  white-space: nowrap;
}

[data-lang="en"] .hero-desc .hero-desc-line:first-child {
  font-size: clamp(14px, 1.45vw, 18px);
  white-space: normal;
}

.hero-desc br {
  display: block;
  content: "";
  margin-top: 4px;
}

.hero-links {
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

.hero-link {
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  color: var(--muted);
  display: inline-flex;
  font-size: 14px;
  font-weight: 700;
  gap: 8px;
  min-height: 42px;
  padding: 10px 14px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 34px;
}

.btn {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 850;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), border-color 180ms var(--ease);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 24%, transparent);
  color: #ffffff;
}

.btn-ghost {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-scroll {
  align-items: center;
  bottom: 28px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  font-size: 12px;
  font-weight: 800;
  gap: 8px;
  left: 50%;
  position: absolute;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-line {
  background: linear-gradient(to bottom, var(--accent), transparent);
  border-radius: 999px;
  height: 38px;
  width: 2px;
}

.section {
  background: var(--bg);
  padding: 92px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-head {
  margin-bottom: 34px;
}

.section-label {
  color: var(--accent);
  display: inline-flex;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.15em;
}

.section h2 {
  font-size: clamp(32px, 5vw, 52px);
  letter-spacing: 0;
  line-height: 1.08;
  margin: 10px 0 0;
}

.about-grid {
  align-items: stretch;
  display: grid;
  gap: 30px;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
}

.about-text,
.about-card,
.demo-card,
.timeline-content,
.exp-card,
.case-card,
.award-card,
.skill-group,
.contact-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.about-text {
  padding: 30px;
}

.about-text p {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 18px;
}

.about-text strong {
  color: var(--ink);
}

.about-stats {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 28px;
}

.stat {
  background: var(--panel-soft);
  border-radius: var(--radius-sm);
  padding: 18px;
}

.stat-num {
  color: var(--accent);
  display: block;
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.stat-label {
  color: var(--muted);
  display: block;
  font-size: 13px;
  font-weight: 750;
  margin-top: 8px;
}

.about-card {
  overflow: hidden;
  padding: 24px;
}

.about-card-inner {
  background:
    radial-gradient(circle at 18% 8%, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent 16rem),
    var(--panel-soft);
  border-radius: 18px;
  min-height: 100%;
  padding: 24px;
}

.about-avatar {
  border: 5px solid var(--panel);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  height: 112px;
  object-fit: cover;
  width: 112px;
}

.about-info {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.info-row {
  align-items: center;
  color: var(--muted);
  display: flex;
  font-size: 14px;
  font-weight: 700;
  gap: 10px;
}

.info-row-wide span:last-child {
  line-height: 1.35;
  white-space: nowrap;
}

[data-lang="en"] .info-row-wide {
  align-items: flex-start;
}

[data-lang="en"] .info-row-wide span:last-child {
  white-space: normal;
}

.info-icon {
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  height: 32px;
  justify-content: center;
  width: 32px;
}

.demo-grid,
.awards-grid,
.skills-grid {
  display: grid;
  gap: 18px;
}

.demo-grid {
  grid-template-columns: repeat(2, 1fr);
}

.demo-card {
  overflow: hidden;
}

.demo-preview {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 17%, transparent), color-mix(in srgb, var(--accent-2) 15%, transparent)),
    var(--panel-soft);
  min-height: 190px;
  padding: 22px;
}

.demo-window {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  min-height: 142px;
  padding: 18px;
}

.demo-logo {
  display: block;
  height: 52px;
  margin-bottom: 14px;
  object-fit: contain;
  width: 52px;
}

.demo-window-dots {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
}

.demo-window-dots span {
  background: var(--line);
  border-radius: 50%;
  height: 8px;
  width: 8px;
}

.demo-window strong {
  display: block;
  font-size: 24px;
  line-height: 1.2;
}

.demo-body {
  padding: 24px;
}

.card-kicker {
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-body h3,
.award-card h3,
.skill-group h3 {
  font-size: 24px;
  line-height: 1.2;
  margin: 9px 0 10px;
}

.demo-body p,
.case-card p {
  color: var(--muted);
  margin: 0;
}

.tag-row,
.metric-row,
.skill-tags,
.timeline-tags {
  flex-wrap: wrap;
  gap: 8px;
}

.tag,
.metric,
.skill-tag,
.detail-badge {
  border-radius: 999px;
  display: inline-flex;
  font-size: 12px;
  font-weight: 850;
  padding: 6px 10px;
}

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

.metric,
.detail-badge {
  background: color-mix(in srgb, var(--accent) 12%, var(--panel));
  color: var(--accent);
}

.metric-row,
.tag-row {
  margin-top: 15px;
}

.timeline {
  margin: 0 auto;
  max-width: 920px;
  position: relative;
}

.timeline::before {
  background: var(--line);
  bottom: 0;
  content: "";
  left: 16px;
  position: absolute;
  top: 0;
  width: 2px;
}

.timeline-item {
  margin-bottom: 24px;
  padding-left: 48px;
  position: relative;
}

.timeline-dot {
  background: var(--bg-alt);
  border: 3px solid var(--accent);
  border-radius: 50%;
  height: 18px;
  left: 8px;
  position: absolute;
  top: 26px;
  width: 18px;
  z-index: 1;
}

.timeline-content {
  overflow: hidden;
  padding: 26px;
  position: relative;
}

.school-watermark {
  align-items: center;
  color: var(--accent);
  display: flex;
  justify-content: center;
  opacity: 0.11;
  pointer-events: none;
  position: absolute;
  right: 2%;
  top: 50%;
  transform: translateY(-50%);
  width: 25%;
  z-index: 0;
}

.school-watermark img {
  display: block;
  height: auto;
  width: 100%;
}

[data-theme="dark"] .school-watermark {
  opacity: 0.14;
}

.timeline-header,
.timeline-degree,
.timeline-detail {
  position: relative;
  z-index: 1;
}

.timeline-header {
  align-items: flex-start;
  display: flex;
  gap: 18px;
  justify-content: space-between;
}

.timeline-school {
  font-size: 26px;
  line-height: 1.15;
  margin: 0 0 10px;
}

.timeline-date {
  color: var(--muted);
  font-size: 14px;
  font-weight: 850;
  white-space: nowrap;
}

.timeline-degree {
  color: var(--muted);
  margin: 10px 0 14px;
}

.timeline-detail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.exp-list {
  display: grid;
  gap: 24px;
}

.exp-card {
  padding: 26px;
}

.exp-card-header {
  align-items: flex-start;
  display: grid;
  gap: 18px;
  grid-template-columns: 164px 1fr auto;
}

.exp-logo {
  align-items: center;
  background: transparent;
  display: inline-flex;
  height: 58px;
  justify-content: center;
  overflow: hidden;
  width: 148px;
}

.exp-logo img {
  display: block;
  height: 100%;
  object-fit: contain;
  width: 100%;
}

[data-theme="dark"] .exp-logo img {
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.16));
}

.exp-company {
  font-size: 25px;
  line-height: 1.2;
  margin: 0;
}

.exp-role,
.exp-location {
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
  margin: 7px 0 0;
}

.exp-date {
  color: var(--accent);
  font-size: 14px;
  font-weight: 900;
  white-space: nowrap;
}

.exp-body {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.exp-module {
  background: var(--panel-soft);
  border-radius: var(--radius-sm);
  padding: 18px;
}

.exp-module-title {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.module-tag {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  padding: 5px 9px;
}

.exp-module p {
  color: var(--muted);
  margin: 0;
}

.case-list {
  display: grid;
  gap: 18px;
}

.case-card {
  overflow: hidden;
}

.case-summary {
  align-items: flex-start;
  cursor: pointer;
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr auto;
  padding: 24px;
}

.case-summary h3 {
  font-size: 26px;
  line-height: 1.2;
  margin: 8px 0 10px;
}

.case-toggle {
  align-items: center;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
  display: inline-flex;
  font-size: 22px;
  font-weight: 900;
  height: 42px;
  justify-content: center;
  transition: transform 180ms var(--ease);
  width: 42px;
}

.case-card.is-open .case-toggle {
  transform: rotate(45deg);
}

.case-detail {
  border-top: 1px solid var(--line);
  display: none;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
  padding: 0 24px 24px;
}

.case-card.is-open .case-detail {
  display: grid;
}

.case-detail-block {
  background: var(--panel-soft);
  border-radius: var(--radius-sm);
  padding: 18px;
}

.case-detail-block h4 {
  font-size: 15px;
  margin: 0 0 8px;
}

.case-detail-block p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

.awards-marquee {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 0 16px;
  scrollbar-color: var(--accent) var(--panel-soft);
  scrollbar-width: thin;
}

.awards-marquee::-webkit-scrollbar {
  height: 9px;
}

.awards-marquee::-webkit-scrollbar-track {
  background: var(--panel-soft);
  border-radius: 999px;
}

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

.awards-track {
  animation: awards-scroll 34s linear infinite;
  display: flex;
  gap: 18px;
  width: max-content;
}

.awards-marquee:hover .awards-track {
  animation-play-state: paused;
}

.award-card {
  flex: 0 0 286px;
  min-height: 178px;
  padding: 22px;
}

@keyframes awards-scroll {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(calc(-50% - 9px));
  }
}

.award-icon,
.skill-icon {
  align-items: center;
  background: var(--panel-soft);
  border-radius: 15px;
  display: inline-flex;
  font-size: 26px;
  height: 52px;
  justify-content: center;
  margin-bottom: 14px;
  width: 52px;
}

.award-card p {
  color: var(--muted);
  margin: 0;
}

.skills-grid {
  grid-template-columns: repeat(3, 1fr);
}

.skill-group {
  padding: 24px;
}

.skill-tags {
  align-items: flex-start;
  gap: 8px;
  margin-top: 16px;
}

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

.skill-strong {
  background: color-mix(in srgb, var(--accent) 13%, var(--panel));
  color: var(--accent);
}

.contact-section {
  padding-bottom: 98px;
}

.contact-card {
  margin: 0 auto;
  max-width: 900px;
  padding: 44px;
  text-align: center;
}

.contact-card h2 {
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.14;
  margin: 12px auto 0;
  max-width: 760px;
}

.contact-card p {
  color: var(--muted);
  margin: 16px auto 0;
  max-width: 640px;
}

footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  font-size: 14px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--container);
  padding: 28px 24px 38px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms var(--ease), transform 620ms var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  .nav-toggle {
    align-items: center;
    display: block;
    justify-content: center;
  }

  .nav-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    display: none;
    left: 16px;
    padding: 14px;
    position: absolute;
    right: 16px;
    top: calc(var(--nav-h) - 4px);
  }

  .nav-panel.is-open {
    display: grid;
    gap: 14px;
  }

  .nav-links {
    align-items: stretch;
    display: grid;
    gap: 4px;
  }

  .nav-controls {
    justify-content: flex-end;
  }

  .about-grid,
  .demo-grid,
  .case-detail,
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .exp-card-header {
    grid-template-columns: auto 1fr;
  }

  .exp-date {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  .container,
  .nav-inner {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    min-height: auto;
    padding: 52px 18px 84px;
  }

  .hero-avatar {
    height: 128px;
    width: 128px;
  }

  .hero h1 {
    font-size: 56px;
  }

  .section {
    padding: 68px 0;
  }

  .about-stats,
  .awards-grid {
    grid-template-columns: 1fr;
  }

  .info-row-wide span:last-child {
    white-space: normal;
  }

  .timeline::before {
    left: 10px;
  }

  .timeline-item {
    padding-left: 34px;
  }

  .timeline-dot {
    left: 2px;
  }

  .timeline-header,
  .case-summary {
    grid-template-columns: 1fr;
  }

  .timeline-date {
    white-space: normal;
  }

  .exp-card-header {
    grid-template-columns: 1fr;
  }

  .exp-date {
    grid-column: auto;
  }

  .contact-card {
    padding: 28px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

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

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