:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: #ffffff;
  --text: #111827;
  --text-soft: #4b5563;
  --line: #d6deea;
  --brand: #0f766e;
  --brand-2: #0891b2;
  --brand-soft: rgba(15, 118, 110, 0.1);
  --shadow: 0 18px 40px -30px rgba(15, 23, 42, 0.45);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 5% 0%, rgba(8, 145, 178, 0.2), transparent 30%),
    radial-gradient(circle at 90% 8%, rgba(15, 118, 110, 0.18), transparent 28%),
    var(--bg);
  color: var(--text);
  font-family: "SF Pro Display", "Segoe UI Variable", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

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

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

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -120px;
  z-index: 40;
  background: #0f172a;
  color: #fff;
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0.65rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(244, 247, 251, 0.76);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand small {
  display: block;
  font-size: 0.74rem;
  color: var(--text-soft);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--text-soft);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand);
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-strong);
  min-height: 40px;
  padding: 0.35rem 0.72rem;
  color: var(--text-soft);
}

.hero {
  padding: 4.5rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1.4rem;
}

.hero-card,
.panel,
.timeline-item,
.project-card,
.blog-card,
.post-content,
.resume-card,
.contact-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 2.2rem;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid rgba(8, 145, 178, 0.28);
  background: rgba(8, 145, 178, 0.08);
  color: #0c4a6e;
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
}

.hero h1 {
  margin: 1rem 0 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.hero p {
  margin-top: 1rem;
  color: var(--text-soft);
}

.hero-actions {
  margin-top: 1.4rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  min-height: 44px;
  padding: 0.64rem 1.05rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(120deg, var(--brand) 10%, var(--brand-2) 100%);
  color: #ffffff;
  box-shadow: 0 12px 24px -16px rgba(8, 145, 178, 0.8);
}

.btn-secondary {
  background: #ffffff;
  border-color: var(--line);
  color: var(--text-soft);
}

.quick-info {
  padding: 1.6rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 0.8rem;
}

.info-grid div {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  padding: 0.72rem;
}

.info-grid strong {
  display: block;
  font-size: 0.8rem;
  color: var(--text-soft);
  margin-bottom: 0.2rem;
}

main section {
  padding: 1.2rem 0 2.2rem;
}

.section-title {
  margin: 0 0 0.8rem;
  font-size: clamp(1.35rem, 3vw, 2rem);
  letter-spacing: -0.015em;
}

.section-copy {
  margin: 0;
  color: var(--text-soft);
}

.skill-chips,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.skill-chips span,
.tag {
  padding: 0.35rem 0.72rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.8rem;
  background: #ffffff;
  color: var(--text-soft);
}

.timeline {
  margin-top: 1rem;
  display: grid;
  gap: 0.9rem;
}

.timeline-item {
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem;
}

.timeline-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: baseline;
}

.timeline-top strong {
  font-size: 1rem;
}

.timeline-top span {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.timeline-item p {
  margin: 0.5rem 0 0;
  color: var(--text-soft);
}

.project-grid,
.blog-grid,
.resume-grid,
.footer-grid {
  display: grid;
  gap: 1rem;
}

.project-grid,
.blog-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1rem;
}

.project-card,
.blog-card {
  border-radius: var(--radius-md);
  padding: 1.1rem;
}

.card-title {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.card-copy {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.card-meta {
  margin-top: 0.82rem;
  font-size: 0.8rem;
  color: var(--text-soft);
}

.blog-tools {
  margin-top: 1rem;
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.input,
.select {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  min-height: 44px;
  padding: 0.55rem 0.9rem;
  color: var(--text);
}

.input {
  min-width: min(360px, 100%);
}

.tag-btn {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  min-height: 36px;
  padding: 0.34rem 0.76rem;
  color: var(--text-soft);
  cursor: pointer;
}

.tag-btn.active {
  background: var(--brand-soft);
  color: var(--brand);
  border-color: rgba(15, 118, 110, 0.22);
}

.post-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 1rem;
  align-items: start;
  margin-top: 1rem;
}

.post-toc {
  position: sticky;
  top: 88px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #ffffff;
  padding: 0.9rem;
}

.post-toc h3 {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
}

.post-toc a {
  display: block;
  color: var(--text-soft);
  font-size: 0.88rem;
  padding: 0.2rem 0;
}

.post-content {
  padding: 1.4rem;
  border-radius: var(--radius-md);
}

.post-content h2 {
  margin-top: 1.6rem;
}

.post-content p,
.post-content li {
  color: var(--text-soft);
}

.post-content code {
  background: #e2e8f0;
  border-radius: 6px;
  padding: 0.1rem 0.28rem;
  font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
  font-size: 0.88em;
}

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  z-index: 30;
}

.resume-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1rem;
}

.resume-card {
  padding: 1.05rem;
  border-radius: var(--radius-md);
}

.resume-card h3 {
  margin-top: 0;
  font-size: 1.02rem;
}

.resume-card ul {
  margin: 0;
  padding-left: 1.15rem;
}

.contact-card {
  padding: 1.4rem;
  margin-top: 1rem;
}

.footer {
  margin-top: 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.34);
  padding: 1.2rem 0 2rem;
}

.footer-grid {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.footer p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.beian-block {
  padding-top: 0.45rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

.beian-block p {
  margin: 0;
  color: #64748b;
  font-size: 0.82rem;
}

.beian-block a {
  color: #64748b;
}

.beian-block a:hover {
  color: var(--brand);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.show {
  opacity: 1;
  transform: translateY(0);
}

button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid rgba(8, 145, 178, 0.8);
  outline-offset: 2px;
}

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

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

  .btn {
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}

@media (max-width: 960px) {
  .hero-grid,
  .project-grid,
  .blog-grid,
  .resume-grid,
  .post-layout {
    grid-template-columns: 1fr;
  }

  .post-toc {
    position: static;
  }

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

@media (max-width: 760px) {
  .container {
    width: min(100% - 1.4rem, var(--max-width));
  }

  .nav-wrap {
    min-height: 64px;
  }

  .menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: 66px;
    right: 0.7rem;
    width: min(260px, calc(100vw - 1.4rem));
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.8rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .hero {
    padding: 3rem 0 2.2rem;
  }

  .hero-card,
  .quick-info,
  .project-card,
  .blog-card,
  .contact-card,
  .post-content,
  .resume-card {
    padding: 1rem;
    border-radius: 16px;
  }

  .hero h1 {
    font-size: clamp(1.72rem, 8vw, 2.5rem);
  }

  .hero-actions {
    gap: 0.6rem;
  }

  .btn {
    width: 100%;
  }

  .blog-tools {
    width: 100%;
  }

  .input {
    width: 100%;
    min-width: 100%;
  }

  .timeline-item {
    padding: 0.95rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .beian-block {
    gap: 0.3rem;
  }
}

@media (max-width: 420px) {
  body {
    line-height: 1.55;
  }

  .kicker {
    font-size: 0.76rem;
  }

  .card-copy,
  .section-copy,
  .hero p,
  .timeline-item p {
    font-size: 0.94rem;
  }
}