:root {
      --ink: #17202a;
      --muted: #5b6673;
      --quiet: #7b8490;
      --paper: #fbfaf7;
      --panel: #ffffff;
      --wash: #f0f4f1;
      --line: #d8ded8;
      --navy: #183b56;
      --blue: #28627c;
      --green: #496f64;
      --wine: #8a3a48;
      --gold: #b6842d;
      --shadow: 0 14px 34px rgba(30, 45, 55, 0.08);
      --shadow-soft: 0 1px 2px rgba(30, 45, 55, 0.08);
      --radius: 8px;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 86px;
    }

    body {
      background: var(--paper);
      color: var(--ink);
      font-family: 'Inter', system-ui, sans-serif;
      font-size: 15.5px;
      line-height: 1.72;
      -webkit-font-smoothing: antialiased;
      overflow-x: clip;
    }

    body::before {
      content: '';
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image: linear-gradient(rgba(24, 59, 86, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(24, 59, 86, 0.025) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,0.5), transparent 52%);
      z-index: -1;
    }

    a {
      color: var(--blue);
      text-decoration-thickness: 1px;
      text-underline-offset: 3px;
    }

    a:hover { color: var(--wine); }

    ::selection { background: #dbe8df; color: var(--ink); }

    nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(251, 250, 247, 0.94);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(16px);
    }

    .nav-inner {
      align-items: center;
      display: flex;
      height: 64px;
      justify-content: space-between;
      margin: 0 auto;
      max-width: 1120px;
      padding: 0 26px;
    }

    .nav-brand {
      color: var(--ink);
      font-family: 'Lora', serif;
      font-size: 1.02rem;
      font-weight: 600;
      letter-spacing: 0;
      text-decoration: none;
    }

    .nav-brand span { color: var(--wine); }

    .nav-links {
      align-items: center;
      display: flex;
      gap: 2px;
      list-style: none;
    }

    .nav-links a {
      border-radius: var(--radius);
      color: var(--muted);
      display: block;
      font-size: 0.86rem;
      font-weight: 600;
      letter-spacing: 0;
      padding: 7px 11px;
      text-decoration: none;
      transition: background 0.18s ease, color 0.18s ease;
    }

    .nav-links a:hover {
      background: var(--wash);
      color: var(--ink);
    }

    .hamburger {
      background: transparent;
      border: 0;
      cursor: pointer;
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
    }

    .hamburger span {
      background: var(--ink);
      border-radius: 2px;
      display: block;
      height: 2px;
      transition: 0.2s;
      width: 22px;
    }

    .hero {
      background: linear-gradient(120deg, #fbfaf7 0%, #f7f1e8 52%, #e8f0ed 100%);
      border-bottom: 1px solid var(--line);
      overflow: visible;
      padding: 86px 26px 88px;
      position: relative;
      z-index: 1;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(138, 58, 72, 0.08), transparent 38%), linear-gradient(180deg, transparent 0%, rgba(73, 111, 100, 0.09) 100%);
      pointer-events: none;
    }

    .hero-inner {
      align-items: center;
      display: grid;
      gap: 72px;
      grid-template-columns: 260px minmax(0, 1fr);
      margin: 0 auto;
      max-width: 1120px;
      position: relative;
    }

    .hero-photo {
      aspect-ratio: 4 / 5;
      background: #d9d7d1;
      border: 1px solid rgba(24, 59, 86, 0.2);
      border-radius: var(--radius);
      box-shadow: 22px 22px 0 rgba(73, 111, 100, 0.14), var(--shadow);
      height: auto;
      object-fit: cover;
      object-position: 51% 22%;
      width: 260px;
    }

    .hero-text {
      border-left: 1px solid rgba(24, 59, 86, 0.24);
      color: var(--ink);
      max-width: 720px;
      padding-left: 44px;
    }

    .hero-name {
      color: var(--navy);
      font-family: 'Lora', serif;
      font-size: 3.8rem;
      font-weight: 600;
      line-height: 1.03;
      margin-bottom: 12px;
    }

    .hero-cred {
      color: var(--wine);
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: 0;
      margin-bottom: 18px;
    }

    .hero-position {
      color: var(--ink);
      font-size: 1.02rem;
      font-weight: 700;
      margin-bottom: 5px;
    }

    .hero-institution {
      color: var(--muted);
      font-size: 0.98rem;
      margin-bottom: 18px;
      max-width: 620px;
    }

    .hero-gsu-logo {
      background: transparent;
      border: 0;
      border-radius: 50%;
      bottom: -46px;
      display: block;
      height: 132px;
      overflow: hidden;
      padding: 0;
      position: absolute;
      right: max(34px, calc((100vw - 1120px) / 2 + 30px));
      width: 132px;
      z-index: 2;
    }

    .hero-gsu-logo img {
      display: block;
      height: 116%;
      margin: -8% 0 0 -8%;
      max-width: none;
      object-fit: cover;
      width: 116%;
    }

    .hero-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .hero-link {
      align-items: center;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(24, 59, 86, 0.18);
      border-radius: var(--radius);
      color: var(--navy);
      display: inline-flex;
      font-size: 0.84rem;
      font-weight: 700;
      gap: 7px;
      max-width: 100%;
      min-height: 38px;
      padding: 8px 13px;
      text-decoration: none;
      transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
    }

    .hero-link:hover {
      border-color: rgba(138, 58, 72, 0.38);
      box-shadow: var(--shadow-soft);
      color: var(--wine);
      transform: translateY(-1px);
    }

    .hero-link svg { fill: currentColor; height: 15px; width: 15px; }

    .container {
      margin: 0 auto;
      max-width: 1120px;
      padding: 0 26px;
    }

    section {
      padding: 74px 0;
    }

    section:nth-child(even) { background: rgba(240, 244, 241, 0.72); }

    .section-header {
      align-items: center;
      display: grid;
      gap: 15px;
      grid-template-columns: 38px auto 1fr;
      margin-bottom: 34px;
    }

    .section-icon {
      align-items: center;
      background: var(--navy);
      border-radius: var(--radius);
      display: flex;
      height: 38px;
      justify-content: center;
      width: 38px;
    }

    .section-icon svg { fill: #fff; height: 18px; width: 18px; }

    .section-title {
      color: var(--navy);
      font-family: 'Lora', serif;
      font-size: 1.62rem;
      font-weight: 600;
      line-height: 1.15;
    }

    .section-line {
      background: linear-gradient(90deg, var(--line), transparent);
      height: 1px;
    }

    .edu-list,
    .pub-list,
    .course-list,
    .activity-list { list-style: none; }

    .edu-list,
    .course-list,
    .pub-list { border-top: 1px solid var(--line); }

    .edu-item {
      align-items: flex-start;
      border-bottom: 1px solid var(--line);
      display: grid;
      gap: 24px;
      grid-template-columns: 74px minmax(0, 1fr);
      padding: 18px 0;
    }

    .edu-year,
    .pub-num,
    .activity-year {
      color: var(--wine);
      font-size: 0.82rem;
      font-weight: 800;
      line-height: 1.5;
    }

    .edu-degree {
      color: var(--ink);
      font-size: 0.98rem;
      font-weight: 700;
      line-height: 1.45;
    }

    .pub-title {
      color: var(--muted);
      font-size: 0.9rem;
      font-weight: 500;
      line-height: 1.5;
    }

    .edu-school,
    .pub-authors,
    .pub-venue,
    .activity-place,
    .course-term {
      color: var(--muted);
      font-size: 0.88rem;
    }

    .edu-school { margin-top: 2px; }

    .awards-grid,
    .interests-grid {
      display: grid;
      gap: 16px;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .award-card,
    .interest-item,
    .contact-card {
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow-soft);
    }

    .award-card {
      border-top: 4px solid var(--gold);
      padding: 20px 21px;
      transition: box-shadow 0.18s ease, transform 0.18s ease;
    }

    .award-card:hover {
      box-shadow: var(--shadow);
      transform: translateY(-2px);
    }

    .award-label,
    .pub-section-label,
    .contact-label {
      color: var(--quiet);
      font-size: 0.75rem;
      font-weight: 800;
      letter-spacing: 0;
      text-transform: uppercase;
    }

    .award-card h3 {
      color: var(--navy);
      font-size: 0.98rem;
      line-height: 1.4;
      margin: 8px 0 7px;
    }

    .award-card p {
      color: var(--muted);
      font-size: 0.88rem;
      line-height: 1.58;
    }

    .interest-item {
      align-items: flex-start;
      display: flex;
      gap: 13px;
      padding: 18px 18px;
    }

    .interest-dot {
      background: var(--wine);
      border-radius: 50%;
      flex: 0 0 auto;
      height: 8px;
      margin-top: 8px;
      width: 8px;
    }

    .interest-item span {
      color: var(--ink);
      font-size: 0.94rem;
      font-weight: 650;
      line-height: 1.55;
    }

    .pub-section-label {
      border-bottom: 1px solid var(--line);
      margin: 38px 0 0;
      padding: 0 0 10px;
    }

    .pub-section-label:first-of-type { margin-top: 0; }

    .pub-item {
      border-bottom: 1px solid var(--line);
      display: grid;
      gap: 18px;
      grid-template-columns: 48px minmax(0, 1fr);
      padding: 18px 0;
    }

    .pub-authors { margin-bottom: 3px; }

    .pub-authors strong { color: var(--navy); font-weight: 800; }

    .pub-venue {
      font-style: normal;
      line-height: 1.5;
      margin-top: 3px;
    }

    .pub-venue em {
      color: var(--navy);
      font-style: italic;
      font-weight: 800;
    }

    .pub-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 8px;
    }

    .pub-tag {
      border-radius: 5px;
      display: inline-block;
      font-size: 0.73rem;
      font-weight: 800;
      line-height: 1.3;
      padding: 4px 8px;
      text-decoration: none;
    }

    .tag-journal { background: #e8f0f5; border: 1px solid #c8d8e0; color: var(--blue); }
    .tag-arxiv { background: #edf3ed; border: 1px solid #c9dacd; color: var(--green); }
    .tag-preprint { background: #f8f0dc; border: 1px solid #ead4a4; color: #7c5a16; }

    .teaching-group,
    .activity-group { margin-bottom: 32px; }

    .teaching-group h3,
    .activity-group h3,
    .contact-card h3 {
      color: var(--navy);
      font-size: 1rem;
      font-weight: 800;
      line-height: 1.45;
      margin-bottom: 12px;
    }

    .course-item {
      align-items: baseline;
      border-bottom: 1px solid var(--line);
      display: grid;
      gap: 18px;
      grid-template-columns: 120px minmax(0, 1fr) auto;
      padding: 11px 0;
    }

    .course-code {
      color: var(--wine);
      font-size: 0.84rem;
      font-weight: 800;
      white-space: nowrap;
    }

    .course-name {
      color: var(--ink);
      font-size: 0.92rem;
    }

    .course-term { white-space: nowrap; }

    .activity-columns {
      display: grid;
      gap: 42px;
      grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .activity-item {
      display: grid;
      gap: 14px;
      grid-template-columns: 68px minmax(0, 1fr);
      padding: 8px 0;
    }

    .activity-desc {
      color: var(--ink);
      font-size: 0.91rem;
      line-height: 1.48;
    }

    .service-list { max-width: 840px; }
    .service-label { min-width: 92px; }

    .contact-grid {
      display: grid;
      gap: 22px;
      grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .contact-card { padding: 25px; }

    .contact-row {
      align-items: flex-start;
      display: flex;
      gap: 13px;
      margin-bottom: 15px;
    }

    .contact-row:last-child { margin-bottom: 0; }

    .contact-icon {
      align-items: center;
      background: var(--wash);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      display: flex;
      flex: 0 0 auto;
      height: 34px;
      justify-content: center;
      width: 34px;
    }

    .contact-icon svg { fill: var(--navy); height: 16px; width: 16px; }

    .contact-value {
      color: var(--ink);
      font-size: 0.92rem;
      line-height: 1.55;
    }

    footer {
      background: var(--navy);
      color: rgba(255, 255, 255, 0.72);
      font-size: 0.82rem;
      padding: 30px 24px;
      text-align: center;
    }

    footer a { color: #fff; }

    @media (max-width: 900px) {
      .hero-inner {
        gap: 40px;
        grid-template-columns: 210px minmax(0, 1fr);
      }

      .hero-photo { width: 210px; }
      .hero-name { font-size: 3.05rem; }
      .hero-text { padding-left: 32px; }
      .course-item { grid-template-columns: 110px minmax(0, 1fr); }
      .course-term { grid-column: 2; white-space: normal; }
    }

    @media (max-width: 768px) {
      nav { position: relative; }

      .nav-links {
        background: var(--paper);
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow-soft);
        display: none;
        flex-direction: column;
        gap: 0;
        left: 0;
        padding: 8px 18px 18px;
        position: absolute;
        right: 0;
        top: 64px;
      }

      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px 8px; width: 100%; }
      .hamburger { display: flex; }

      .hero { padding: 54px 22px 58px; }

      .hero-inner {
        gap: 30px;
        grid-template-columns: 1fr;
        text-align: center;
      }

      .hero-photo {
        box-shadow: 14px 14px 0 rgba(73, 111, 100, 0.14), var(--shadow-soft);
        justify-self: center;
        width: 190px;
      }

      .hero-text {
        border-left: 0;
        padding-left: 0;
      }

      .hero-name { font-size: 2.45rem; }
      .hero-gsu-logo { bottom: -34px; height: 92px; right: 22px; width: 92px; }
      .hero-links { justify-content: center; }
      .hero-link { justify-content: center; }

      section { padding: 56px 0; }

      .section-header {
        gap: 12px;
        grid-template-columns: 38px minmax(0, 1fr);
      }

      .section-line { display: none; }

      .contact-grid,
      .activity-columns { grid-template-columns: 1fr; }
    }

    @media (max-width: 520px) {
      .container,
      .nav-inner { padding-left: 18px; padding-right: 18px; }

      .hero-photo { width: 168px; }
      .hero-name { font-size: 2.08rem; }
      .hero-institution { font-size: 0.92rem; }

      .hero-links {
        display: grid;
        grid-template-columns: 1fr;
      }

      .edu-item,
      .pub-item,
      .activity-item {
        grid-template-columns: 1fr;
        gap: 5px;
      }

      .course-item { grid-template-columns: 1fr; gap: 2px; }
      .course-term { grid-column: auto; }
      .contact-card { padding: 21px; }
    }