:root{--primary:#2563eb;--secondary:#60a5fa;--bg:#fff;--tint:#f8fafc;--border:#e5e7eb;--text:#111827;--muted:#6b7280;--shadow:0 18px 45px rgba(17,24,39,0.08);--radius:16px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,HarmonyOS Sans,MiSans,"Source Han Sans SC","Noto Sans CJK SC",Arial,sans-serif;line-height:1.7}
img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button{font:inherit}

.bg-rays{position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:-1;pointer-events:none;display:block}
.shell{width:calc(100% - 40px);max-width:1200px;margin:0 auto}
.site-header{position:fixed;z-index:20;top:0;right:0;left:0;border-bottom:1px solid rgba(229,231,235,0.72);background:rgba(255,255,255,0.78);backdrop-filter:blur(18px)}
.nav{display:flex;min-height:72px;align-items:center;justify-content:space-between}
.brand,.nav-links,.hero-actions,.contact-actions{display:flex;align-items:center}
.brand{gap:10px;font-weight:700}

.nav-links{gap:24px;color:var(--muted);font-size:14px}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.menu-button{display:none;width:42px;height:42px;border:1px solid var(--border);border-radius:12px;background:#fff;cursor:pointer}
.menu-button span{display:block;width:18px;height:2px;margin:4px auto;border-radius:999px;background:var(--text)}
.section{padding:80px 0;scroll-margin-top:80px}
.hero{padding-top:48px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px;align-items:center}
.eyebrow{margin:0 0 12px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:0;text-transform:uppercase}
h1,h2,h3{margin:0;letter-spacing:0;line-height:1.12}
h1{font-size:clamp(48px,7vw,88px)}h2{font-size:clamp(30px,4vw,52px)}h3{font-size:22px}
.role{margin:16px 0 0;font-size:28px;font-weight:700}
.section-heading p,.footer p{color:var(--muted);font-size:18px}
.hero-about{max-width:680px;margin-top:12px;color:var(--muted);font-size:17px}
.hero-about p{margin:10px 0 0}
.hero-actions{gap:12px;margin-top:28px}
.button{display:inline-flex;min-height:46px;align-items:center;justify-content:center;border-radius:999px;padding:0 20px;font-weight:700;transition:transform 0.2s,box-shadow 0.2s}
.button:hover{transform:translateY(-2px)}
.button.primary{background:var(--primary);color:#fff;box-shadow:0 16px 30px rgba(37,99,235,0.22)}
.button.secondary{border:1px solid var(--border);background:#fff;color:var(--text)}
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center;min-height:440px}

/* Folder dock */
.folder-dock{position:relative;width:140px;height:110px;cursor:pointer;--fc:#2563eb;--fb:#1d4ed8}
.folder-back{position:absolute;z-index:0;width:100%;height:100%;background:var(--fb);border-radius:0 12px 12px 12px;transition:transform 0.3s}
.folder-back::before{position:absolute;z-index:0;bottom:100%;left:0;content:"";width:38px;height:12px;background:var(--fb);border-radius:6px 6px 0 0}
.folder-front{position:absolute;z-index:4;inset:0;background:var(--fc);border-radius:6px 12px 12px 12px;transform-origin:bottom;transition:transform 0.4s cubic-bezier(.34,1.5,.7,1)}
.folder-dock.open .folder-front{transform:skew(15deg) scaleY(0.6)}
.folder-dock.open .folder-front+.folder-front{transform:skew(-15deg) scaleY(0.6)}
.folder-dock:hover .folder-back{transform:translateY(-4px)}
.folder-dock:hover .folder-front{transform:skew(15deg) scaleY(0.6)}
.folder-dock:hover .folder-front+.folder-front{transform:skew(-15deg) scaleY(0.6)}
.folder-paper{position:absolute;z-index:3;left:50%;bottom:12%;width:78%;height:72%;background:#fff;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-decoration:none;color:var(--text);transition:all 0.4s cubic-bezier(.34,1.5,.7,1);box-shadow:0 2px 8px rgba(0,0,0,0.08)}
.folder-dock.open .paper-1{transform:translate(-140%,-60%) rotateZ(-12deg)}
.folder-dock.open .paper-2{transform:translate(20%,-60%) rotateZ(12deg)}
.folder-dock.open .paper-3{transform:translate(-60%,-85%) rotateZ(4deg)}
.folder-dock:not(.open) .folder-paper{transform:translate(-50%,8%)}
.folder-paper:hover{box-shadow:0 8px 24px rgba(0,0,0,0.15)}
.paper-icon{font-size:28px;line-height:1}
.paper-label{font-size:12px;font-weight:700;color:var(--muted)}
.folder-dock:focus-visible{outline:2px solid var(--primary);outline-offset:6px;border-radius:14px}

.section-heading{max-width:760px;margin-bottom:42px}
.project-card{transition:transform 0.25s,box-shadow 0.25s}
.project-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.project-list{display:grid;gap:24px}
.project-card{overflow:hidden;border:1px solid var(--border);border-radius:16px;background:#fff;box-shadow:var(--shadow)}
.project-summary{display:grid;grid-template-columns:320px minmax(0,1fr) auto;gap:26px;align-items:center;padding:22px}
.project-cover{overflow:hidden;border-radius:14px;background:var(--tint)}
.project-cover img{width:100%;transition:transform 0.35s}
.project-card:hover .project-cover img{transform:scale(1.04)}
.project-meta{margin:10px 0 18px;color:var(--muted)}
.expand-button{width:42px;height:42px;border:1px solid var(--border);border-radius:999px;background:#fff;color:var(--primary);cursor:pointer;font-size:24px}
.project-detail{display:none;border-top:1px solid var(--border);padding:0 28px 28px}
.project-card.open .project-detail{display:block}
.detail-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:26px}
.detail-block{border-radius:14px;background:var(--tint);padding:18px}
.detail-block strong{display:block;margin-bottom:6px}.detail-block p{color:var(--muted)}
.project-link{display:inline-flex;margin-top:14px;border:1px solid var(--primary);border-radius:999px;padding:6px 16px;font-size:13px;font-weight:700;color:var(--primary);transition:background 0.2s,color 0.2s}
.project-link:hover{background:var(--primary);color:#fff}

.gallery-scroll{overflow:hidden;border-radius:16px;padding:8px 0;-webkit-mask-image:linear-gradient(to right,transparent,black 80px,black calc(100% - 80px),transparent);mask-image:linear-gradient(to right,transparent,black 80px,black calc(100% - 80px),transparent)}
.gallery-track{display:flex;gap:16px;width:max-content;animation:galleryScroll 50s linear infinite;will-change:transform}
.gallery-track:hover{animation-play-state:paused}
.gallery-card{flex:0 0 auto;width:300px;height:240px;border-radius:12px;overflow:hidden;cursor:pointer}
.gallery-card img{width:100%;height:100%;object-fit:cover;display:block}
@keyframes galleryScroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

.footer{background:#0f172a;color:#fff;padding:80px 0}
.footer .eyebrow,.footer h2{color:#fff}.footer p{color:#cbd5e1}
.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,0.86fr);gap:72px;align-items:center}
.contact-card{display:grid;gap:14px;padding:24px;border:1px solid var(--border);border-radius:16px;background:#fff;box-shadow:var(--shadow);color:var(--text)}
.contact-card p{display:flex;justify-content:space-between;gap:18px;margin:0;color:var(--muted)}.contact-card strong{color:var(--text)}

.lightbox{position:fixed;z-index:999;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.3s}
.lightbox.open{opacity:1;pointer-events:auto}
.lightbox-bg{position:absolute;inset:0;background:rgba(0,0,0,0.9)}
.lightbox-img{position:relative;z-index:1;max-width:90vw;max-height:88vh;border-radius:8px;object-fit:contain}
.lightbox-close{position:absolute;z-index:2;top:20px;right:20px;width:44px;height:44px;border:0;border-radius:999px;background:rgba(255,255,255,0.15);color:#fff;font-size:22px;cursor:pointer;display:grid;place-items:center}
.lightbox-close:hover{background:rgba(255,255,255,0.3)}
.lightbox-prev,.lightbox-next{position:absolute;z-index:2;top:50%;transform:translateY(-50%);width:48px;height:48px;border:0;border-radius:999px;background:rgba(255,255,255,0.12);color:#fff;font-size:28px;cursor:pointer;display:grid;place-items:center}
.lightbox-prev{left:16px}.lightbox-next{right:16px}
.lightbox-prev:hover,.lightbox-next:hover{background:rgba(255,255,255,0.3)}
.lightbox-counter{position:absolute;z-index:2;bottom:24px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,0.7);font-size:14px;font-weight:600;letter-spacing:1px}

.reveal{opacity:0;transform:translateY(24px);transition:opacity 0.7s,transform 0.7s}
.reveal.visible{opacity:1;transform:translateY(0)}

@media(max-width:920px){
.menu-button{display:block}
.nav-links{position:fixed;top:72px;right:20px;left:20px;display:none;flex-direction:column;align-items:stretch;border:1px solid var(--border);border-radius:16px;background:#fff;padding:16px;box-shadow:var(--shadow)}
.nav-links.open{display:flex}.nav-links a{padding:10px 6px}
.hero-grid,.project-summary{grid-template-columns:1fr}.hero{min-height:auto}.hero-visual{min-height:320px}
.contact-grid{grid-template-columns:1fr}.detail-grid{grid-template-columns:1fr}
}
@media(max-width:620px){
.shell{width:calc(100% - 28px)}.section{padding:56px 0}
.hero-actions{align-items:stretch;flex-direction:column}
.button{width:100%}.project-summary{padding:16px}.contact-card p{display:block}
.gallery-card{width:220px;height:180px}.gallery-track{gap:10px;animation-duration:35s}.gallery-scroll{-webkit-mask-image:linear-gradient(to right,transparent,black 40px,black calc(100% - 40px),transparent);mask-image:linear-gradient(to right,transparent,black 40px,black calc(100% - 40px),transparent)}
.hero-visual{min-height:260px}
.folder-dock{width:120px;height:90px}
.lightbox-prev,.lightbox-next{width:40px;height:40px;font-size:24px}.lightbox-prev{left:8px}.lightbox-next{right:8px}
.lightbox-close{top:12px;right:12px;width:38px;height:38px;font-size:18px}
}