:root {
        --ink: #e8ecf1;
        --muted: #8e99a9;
        --paper: #0f1729;
        --line: #1e2d4a;
        --green: #34d399;
        --blue: #60a5fa;
        --red: #f87171;
        --gold: #fbbf24;
        --violet: #a78bfa;
        --white: #1a2744;
        --shadow: 0 18px 55px rgba(0, 0, 0, 0.35);
        --card-bg: #162036;
      }

      * {
        box-sizing: border-box;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        margin: 0;
        color: var(--ink);
        background:
          linear-gradient(90deg, rgba(52, 211, 153, 0.06) 1px, transparent 1px),
          linear-gradient(0deg, rgba(96, 165, 250, 0.05) 1px, transparent 1px),
          var(--paper);
        background-size: 56px 56px;
        font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        line-height: 1.6;
      }

      a {
        color: inherit;
      }

      .skip-link {
        position: absolute;
        left: 1rem;
        top: -4rem;
        padding: 0.65rem 0.9rem;
        background: var(--blue);
        color: var(--paper);
        z-index: 10;
      }

      .skip-link:focus {
        top: 1rem;
      }

      .site-shell {
        min-height: 100vh;
      }

      .topbar {
        position: sticky;
        top: 0;
        z-index: 20;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        width: min(1120px, calc(100% - 32px));
        margin: 0 auto;
        padding: 0.8rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        background: rgba(15, 23, 41, 0.88);
        backdrop-filter: blur(14px);
      }

      .brand {
        display: inline-flex;
        align-items: center;
        gap: 0.7rem;
        text-decoration: none;
        font-weight: 800;
      }

      .brand-mark {
        display: grid;
        width: 42px;
        height: 42px;
        place-items: center;
        border: 2px solid var(--blue);
        background: var(--card-bg);
        box-shadow: 4px 4px 0 var(--green);
      }

      .nav {
        display: flex;
        align-items: center;
        gap: 0.35rem;
        flex-wrap: wrap;
        justify-content: flex-end;
      }

      .nav a {
        min-height: 40px;
        padding: 0.45rem 0.75rem;
        border-radius: 6px;
        color: var(--muted);
        font-size: 0.94rem;
        font-weight: 700;
        text-decoration: none;
      }

      .nav a:hover,
      .nav a:focus-visible {
        background: rgba(255, 255, 255, 0.08);
        color: var(--ink);
      }

      .hero {
        width: min(1120px, calc(100% - 32px));
        margin: 0 auto;
        padding: clamp(1.7rem, 5vw, 4.2rem) 0 3rem;
        display: grid;
        grid-template-columns: minmax(0, 1fr) 390px;
        gap: clamp(2rem, 5vw, 4.5rem);
        align-items: center;
      }

      .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 0.45rem;
        margin: 0 0 1rem;
        color: var(--green);
        font-weight: 900;
        letter-spacing: 0;
        text-transform: uppercase;
        font-size: 0.82rem;
        text-shadow: 0 0 12px rgba(52, 211, 153, 0.25);
      }

      h1,
      h2,
      h3,
      p {
        margin-top: 0;
      }

      h1 {
        max-width: 820px;
        margin-bottom: 1.25rem;
        font-size: clamp(2.15rem, 5.8vw, 4.9rem);
        line-height: 1.02;
        letter-spacing: 0;
      }

      .lead {
        max-width: 680px;
        color: #b0bac9;
        font-size: clamp(1rem, 1.6vw, 1.18rem);
      }

      .actions {
        display: flex;
        gap: 0.8rem;
        flex-wrap: wrap;
        margin-top: 1.8rem;
      }

      .button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.55rem;
        min-height: 48px;
        padding: 0.7rem 1rem;
        border: 2px solid var(--blue);
        border-radius: 7px;
        background: var(--blue);
        color: var(--paper);
        font-weight: 900;
        text-decoration: none;
        box-shadow: 5px 5px 0 rgba(52, 211, 153, 0.3);
        transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
      }

      .button:hover {
        transform: translateY(-3px) scale(1.02);
        box-shadow: 7px 7px 0 rgba(52, 211, 153, 0.4);
      }

      .btn-icon {
        width: 20px;
        height: 20px;
        fill: currentColor;
        transition: transform 250ms ease;
      }

      .button:hover .btn-icon {
        transform: translateX(2px) scale(1.12);
      }

      .button.secondary {
        background: transparent;
        color: var(--blue);
        border-color: var(--blue);
        box-shadow: 5px 5px 0 rgba(96, 165, 250, 0.18);
      }

      .button.secondary:hover {
        background: rgba(96, 165, 250, 0.1);
        box-shadow: 7px 7px 0 rgba(96, 165, 250, 0.28);
      }

      .portrait {
        position: relative;
      }

      .profile-card {
        position: relative;
        padding: 0.85rem;
        border: 2px solid var(--line);
        background: var(--card-bg);
        box-shadow: var(--shadow), 9px 9px 0 rgba(96, 165, 250, 0.2);
        transform: rotate(1deg);
        transition: transform 400ms ease, box-shadow 400ms ease;
      }

      .profile-card::after {
        content: '';
        position: absolute;
        inset: 0;
        background-image:
          linear-gradient(rgba(96, 165, 250, 0.07) 1px, transparent 1px),
          linear-gradient(90deg, rgba(52, 211, 153, 0.07) 1px, transparent 1px);
        background-size: 14px 14px;
        opacity: 0;
        transition: opacity 400ms ease;
        pointer-events: none;
        border-radius: inherit;
      }

      .profile-card:hover {
        transform: rotate(0deg) scale(1.03);
        box-shadow: var(--shadow),
                    0 0 0 2px rgba(52, 211, 153, 0.5),
                    0 0 0 4px rgba(96, 165, 250, 0.2),
                    0 0 30px rgba(96, 165, 250, 0.15),
                    0 0 60px rgba(52, 211, 153, 0.08),
                    9px 9px 0 rgba(96, 165, 250, 0.4);
      }

      .profile-card:hover::after {
        opacity: 1;
        animation: gridGlow 2.5s ease-in-out infinite;
      }

      @keyframes gridGlow {
        0%, 100% { opacity: 0.3; }
        50%      { opacity: 0.9; }
      }

      .profile-photo {
        display: block;
        width: 100%;
        aspect-ratio: 4 / 5;
        border: 1px solid var(--line);
        object-fit: cover;
        object-position: center;
      }

      .profile-caption {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        padding-top: 0.85rem;
        color: var(--muted);
        font-size: 0.95rem;
      }

      .profile-caption strong {
        display: block;
        color: var(--ink);
        font-size: 1rem;
      }

      .section {
        border-top: 1px solid var(--line);
        background: rgba(26, 39, 68, 0.45);
      }

      .section-inner {
        width: min(1120px, calc(100% - 32px));
        margin: 0 auto;
        padding: clamp(2.6rem, 6vw, 5rem) 0;
      }

      h2 {
        margin-bottom: 1rem;
        font-size: clamp(2rem, 4vw, 3.6rem);
        line-height: 1;
        letter-spacing: 0;
      }

      .section-copy {
        max-width: 720px;
        color: #8e99a9;
        font-size: 1.08rem;
      }

      .service-grid,
      .video-grid,
      .social-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 1rem;
        margin-top: 2rem;
      }

      .card {
        min-height: 100%;
        padding: 1.2rem;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: var(--card-bg);
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
      }

      .service-card {
        border-top: 6px solid var(--green);
      }

      .service-card:nth-child(2) {
        border-top-color: var(--blue);
      }

      .service-card:nth-child(3) {
        border-top-color: var(--red);
      }

      h3 {
        margin-bottom: 0.55rem;
        font-size: 1.15rem;
        line-height: 1.25;
        color: var(--ink);
      }

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

      .work-strip {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 1rem;
        margin-top: 2rem;
      }

      .feature {
        min-height: 300px;
        padding: clamp(1.2rem, 4vw, 2rem);
        border: 2px solid var(--line);
        background:
          linear-gradient(135deg, rgba(52, 211, 153, 0.1), transparent 42%),
          linear-gradient(45deg, rgba(96, 165, 250, 0.1), transparent 56%),
          var(--card-bg);
        box-shadow: 8px 8px 0 rgba(96, 165, 250, 0.12);
      }

      .feature p {
        max-width: 620px;
        color: #b0bac9;
        font-size: 1.1rem;
      }

      .mini-stack {
        display: grid;
        gap: 1rem;
      }

      .stat {
        padding: 1.15rem;
        border-left: 6px solid var(--gold);
        background: var(--card-bg);
        box-shadow: 0 10px 26px rgba(0, 0, 0, 0.2);
      }

      .stat strong {
        display: block;
        font-size: 1.5rem;
      }

      .github-cta {
        display: flex;
        align-items: center;
        gap: 1.25rem;
        margin-top: 2rem;
        padding: 1.25rem 1.5rem;
        border: 2px solid var(--line);
        border-radius: 8px;
        background: linear-gradient(135deg, rgba(139, 148, 158, 0.08), rgba(15, 23, 41, 0.95));
        color: var(--ink);
        text-decoration: none;
        transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
      }

      .github-cta:hover,
      .github-cta:focus-visible {
        transform: translateY(-3px);
        box-shadow: 0 18px 36px rgba(0, 0, 0, 0.3);
        border-color: #8b949e;
      }

      .github-cta-icon {
        display: grid;
        width: 52px;
        height: 52px;
        flex: 0 0 auto;
        place-items: center;
        border-radius: 10px;
        background: rgba(139, 148, 158, 0.15);
        color: #8b949e;
        border: 1.5px solid rgba(139, 148, 158, 0.3);
        transition: background 200ms ease, color 200ms ease;
      }

      .github-cta:hover .github-cta-icon {
        background: #8b949e;
        color: var(--paper);
      }

      .github-cta-icon svg {
        width: 28px;
        height: 28px;
        fill: currentColor;
      }

      .github-cta-text {
        display: flex;
        flex-direction: column;
        gap: 0.2rem;
      }

      .github-cta-text strong {
        font-size: 1.15rem;
      }

      .github-cta-text span {
        color: var(--muted);
        font-size: 0.94rem;
      }

      .github-cta-arrow {
        margin-left: auto;
        font-size: 1.5rem;
        color: var(--muted);
        transition: transform 180ms ease;
      }

      .github-cta:hover .github-cta-arrow {
        transform: translateX(4px);
      }

      .video-card {
        padding: 0;
        overflow: hidden;
      }

      .video-card a {
        color: inherit;
        text-decoration: none;
      }

      .video-thumb {
        display: block;
        width: 100%;
        aspect-ratio: 16 / 9;
        background: #0d1320;
        object-fit: cover;
      }

      .video-body {
        padding: 1rem;
      }

      .video-meta {
        display: flex;
        gap: 0.5rem;
        flex-wrap: wrap;
        margin-bottom: 0.65rem;
        color: var(--muted);
        font-size: 0.9rem;
        font-weight: 700;
      }

      .video-description {
        min-height: 3.1rem;
      }

      .video-link {
        display: inline-flex;
        margin-top: 1rem;
        color: var(--blue);
        font-weight: 900;
      }

      .social-card {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        color: var(--ink);
        text-decoration: none;
        transition: transform 160ms ease, box-shadow 160ms ease;
      }

      .social-card:hover,
      .social-card:focus-visible {
        transform: translateY(-3px);
        box-shadow: 0 18px 36px rgba(0, 0, 0, 0.3);
      }

      .social-top {
        display: flex;
        align-items: center;
        gap: 0.75rem;
      }

      .social-icon {
        display: grid;
        width: 44px;
        height: 44px;
        flex: 0 0 auto;
        place-items: center;
        border-radius: 8px;
        color: var(--paper);
        border: 1.5px solid;
        transition: background 200ms ease, color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
      }

      .social-icon svg {
        width: 23px;
        height: 23px;
        fill: currentColor;
      }

      .social-card:hover .social-icon {
        color: var(--paper);
        transform: scale(1.06);
      }

      .tiktok {
        background: rgba(45, 212, 191, 0.18);
        color: #2dd4bf;
        border-color: rgba(45, 212, 191, 0.35);
      }
      .social-card:hover .tiktok {
        background: #2dd4bf;
        border-color: #2dd4bf;
        box-shadow: 0 0 12px rgba(45, 212, 191, 0.5), 0 0 30px rgba(45, 212, 191, 0.2);
      }

      .youtube {
        background: rgba(239, 68, 68, 0.18);
        color: #ef4444;
        border-color: rgba(239, 68, 68, 0.35);
      }
      .social-card:hover .youtube {
        background: #ef4444;
        border-color: #ef4444;
        box-shadow: 0 0 12px rgba(239, 68, 68, 0.5), 0 0 30px rgba(239, 68, 68, 0.2);
      }

      .facebook {
        background: rgba(59, 130, 246, 0.18);
        color: #3b82f6;
        border-color: rgba(59, 130, 246, 0.35);
      }
      .social-card:hover .facebook {
        background: #3b82f6;
        border-color: #3b82f6;
        box-shadow: 0 0 12px rgba(59, 130, 246, 0.5), 0 0 30px rgba(59, 130, 246, 0.2);
      }

      .goodreads {
        background: rgba(217, 119, 6, 0.18);
        color: #d97706;
        border-color: rgba(217, 119, 6, 0.35);
      }
      .social-card:hover .goodreads {
        background: #d97706;
        border-color: #d97706;
        box-shadow: 0 0 12px rgba(217, 119, 6, 0.5), 0 0 30px rgba(217, 119, 6, 0.2);
      }

      .telegram {
        background: rgba(14, 165, 233, 0.18);
        color: #0ea5e9;
        border-color: rgba(14, 165, 233, 0.35);
      }
      .social-card:hover .telegram {
        background: #0ea5e9;
        border-color: #0ea5e9;
        box-shadow: 0 0 12px rgba(14, 165, 233, 0.5), 0 0 30px rgba(14, 165, 233, 0.2);
      }

      .reddit {
        background: rgba(249, 115, 22, 0.18);
        color: #f97316;
        border-color: rgba(249, 115, 22, 0.35);
      }
      .social-card:hover .reddit {
        background: #f97316;
        border-color: #f97316;
        box-shadow: 0 0 12px rgba(249, 115, 22, 0.5), 0 0 30px rgba(249, 115, 22, 0.2);
      }

      .wechat {
        background: rgba(34, 197, 94, 0.18);
        color: #22c55e;
        border-color: rgba(34, 197, 94, 0.35);
      }
      .social-card:hover .wechat {
        background: #22c55e;
        border-color: #22c55e;
        box-shadow: 0 0 12px rgba(34, 197, 94, 0.5), 0 0 30px rgba(34, 197, 94, 0.2);
      }

      .linkedin {
        background: rgba(10, 102, 194, 0.18);
        color: #0a66c2;
        border-color: rgba(10, 102, 194, 0.35);
      }
      .social-card:hover .linkedin {
        background: #0a66c2;
        border-color: #0a66c2;
        box-shadow: 0 0 12px rgba(10, 102, 194, 0.5), 0 0 30px rgba(10, 102, 194, 0.2);
      }

      .github {
        background: rgba(139, 148, 158, 0.18);
        color: #8b949e;
        border-color: rgba(139, 148, 158, 0.35);
      }
      .social-card:hover .github {
        background: #8b949e;
        border-color: #8b949e;
        box-shadow: 0 0 12px rgba(139, 148, 158, 0.5), 0 0 30px rgba(139, 148, 158, 0.2);
      }

      .handle {
        color: var(--muted);
        font-size: 0.94rem;
      }

      .contact-panel {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 1rem;
        align-items: center;
        padding: clamp(1.2rem, 4vw, 2rem);
        border: 2px solid var(--blue);
        background: linear-gradient(135deg, rgba(96, 165, 250, 0.12), rgba(15, 23, 41, 0.95));
        color: var(--ink);
        box-shadow: 8px 8px 0 rgba(52, 211, 153, 0.18);
      }

      .contact-panel p {
        margin-bottom: 0;
        color: #b0bac9;
      }

      .contact-panel .button {
        background: var(--blue);
        color: var(--paper);
        border-color: var(--blue);
        box-shadow: none;
      }

      footer {
        width: min(1120px, calc(100% - 32px));
        margin: 0 auto;
        padding: 1.5rem 0 2rem;
        color: var(--muted);
        font-size: 0.94rem;
        border-top: 1px solid var(--line);
      }

      @media (max-width: 860px) {
        .topbar {
          align-items: flex-start;
          flex-direction: column;
        }

        .nav {
          justify-content: flex-start;
        }

        .hero,
        .work-strip,
        .contact-panel {
          grid-template-columns: 1fr;
        }

        .portrait {
          max-width: 420px;
          width: 100%;
        }

        .service-grid,
        .video-grid,
        .social-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }
      }

      @media (max-width: 560px) {
        .service-grid,
        .video-grid,
        .social-grid {
          grid-template-columns: 1fr;
        }

        .nav a {
          padding-left: 0;
          padding-right: 0.85rem;
        }

        .profile-card {
          transform: none;
        }
      }

      .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 600ms ease, transform 600ms ease;
      }

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

      [data-reveal] {
        opacity: 0;
        transition: opacity 0.7s ease, transform 0.7s ease;
      }

      [data-reveal=top] {
        transform: translateY(-40px);
        transition-delay: 0.1s;
      }
      [data-reveal=top].visible {
        opacity: 1;
        transform: translateY(0);
      }

      [data-reveal=left] {
        transform: translateX(-60px);
        transition-delay: 0.25s;
      }
      [data-reveal=left].visible {
        opacity: 1;
        transform: translateX(0);
      }

      [data-reveal=right] {
        transform: translateX(60px);
        transition-delay: 0.4s;
      }
      [data-reveal=right].visible {
        opacity: 1;
        transform: translateX(0);
      }

      [data-reveal=bottom] {
        transform: translateY(40px);
        transition-delay: 0.55s;
      }
      [data-reveal=bottom].visible {
        opacity: 1;
        transform: translateY(0);
      }

      [data-reveal=scale] {
        transform: rotate(1deg) scale(0.85);
        transition-delay: 0.7s;
      }
      [data-reveal=scale].visible {
        opacity: 1;
        transform: rotate(1deg) scale(1);
      }