/* ===== DESIGN TOKENS ===== */
:root {
  --bg-body: #ffffff;
  --bg-hero: #eefcf8;
  --bg-card: rgba(255,255,255,.78);
  --bg-card-hover: rgba(255,255,255,.95);
  --bg-glass: rgba(255,255,255,.78);
  --border-glass: rgba(13,148,136,.18);
  --accent-1: #0f766e;
  --accent-2: #0d9488;
  --accent-3: #f59e0b;
  --accent-grad: linear-gradient(135deg, #0f766e 0%, #14b8a6 55%, #2dd4bf 100%);
  --accent-grad-r: linear-gradient(135deg, #2dd4bf 0%, #14b8a6 48%, #0f766e 100%);
  --text: #334155;
  --text-dim: #64748b;
  --text-bright: #1e293b;
  --text-on-dark: #1e293b;
  --text-dim-on-dark: #475569;
  --text-bright-on-dark: #0f172a;
  --shadow-glow: 0 0 40px rgba(20,184,166,.14);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: .35s cubic-bezier(.4,0,.2,1);
  --nav-h: 72px;
  --max-w: 1140px;
  --font: 'Inter','Noto Sans TC', sans-serif;
}

/* ===== RESET ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 20px);background:var(--bg-body)}
html.i18n-pending body{visibility:hidden}
body{font-family:var(--font);color:var(--text);background:var(--bg-body);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer;border:none;background:none}

/* ===== UTILITIES ===== */
.container{width:90%;max-width:var(--max-w);margin:0 auto}
.section{padding:100px 0}
.page-hero + .section{padding-top:96px}
.section-alt{background:#f0fdfa}
.section-header{text-align:center;margin-bottom:56px}
.section-tag{display:inline-block;background:var(--accent-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;margin-bottom:10px}
.section-title{font-size:2.2rem;font-weight:800;color:var(--text-bright);margin-bottom:12px}
.section-desc{color:var(--text-dim);font-size:1rem;max-width:560px;margin:0 auto}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;transition:var(--transition)}
.btn-grad{background:var(--accent-grad);color:#fff;box-shadow:0 4px 20px rgba(13,148,136,.24)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(13,148,136,.34)}
.btn-outline{border:1.5px solid #cbd5e1;color:var(--text-bright)}
.btn-outline:hover{background:rgba(13,148,136,.08);border-color:var(--accent-1)}
.btn-on-dark{border-color:rgba(15,118,110,.28);color:var(--accent-1);background:rgba(255,255,255,.64)}
.btn-on-dark:hover{background:rgba(240,253,250,.92);border-color:var(--accent-1)}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  background: rgba(255, 255, 255, 0.88); backdrop-filter: blur(14px);
  z-index: 2000; transition: var(--transition); border-bottom: 1px solid rgba(13,148,136,0.12);
  color: var(--text-bright);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98); color: var(--text-bright);
  border-bottom: 1px solid rgba(13,148,136,0.14);
  box-shadow: 0 10px 30px rgba(15,118,110,0.08);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; width: 94%; max-width: 1400px; margin: 0 auto;
}
.nav-logo { font-weight: 800; font-size: 1.3rem; color: var(--text-bright); display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.navbar.scrolled .nav-logo { color: var(--text-bright); }
.nav-logo .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent-grad); }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a { color: var(--text-dim); padding: 8px 16px; border-radius: 8px; font-weight: 600; font-size: 0.95rem; transition: 0.2s; white-space: nowrap; }
.navbar.scrolled .nav-links a { color: var(--text-dim); }
.nav-links a.active, .nav-links a:hover { color: var(--accent-1); background: rgba(13,148,136,0.08); }
.navbar.scrolled .nav-links a.active, .navbar.scrolled .nav-links a:hover { color: var(--accent-1); background: rgba(13,148,136,0.08); }
.lang-switch { display: flex; gap: 10px; margin-left: 20px; border-left: 1px solid rgba(13,148,136,0.16); padding-left: 20px; }
.navbar.scrolled .lang-switch { border-color: rgba(13,148,136,0.16); }
.lang-btn { font-size: 0.8rem; font-weight: 700; opacity: 0.5; color: inherit; }
.lang-btn.active { opacity: 1; color: var(--accent-1); }
.hamburger{display:none;width:44px;height:44px;border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px;color:inherit;transition:background .2s ease}
.hamburger:hover{background:rgba(255,255,255,.1)}
.navbar.scrolled .hamburger:hover{background:rgba(13,148,136,.08)}
.hamburger span{display:block;width:22px;height:2px;border-radius:2px;background:currentColor;transition:transform .25s ease,opacity .2s ease}

/* ===== HERO SPLIT ===== */
.hero {
  min-height: 100vh; min-height: 100svh; display: flex; 
  background:
    radial-gradient(circle at 12% 18%, rgba(20,184,166,.22), transparent 34%),
    radial-gradient(circle at 86% 14%, rgba(45,212,191,.22), transparent 30%),
    linear-gradient(135deg, #f0fdfa 0%, #ecfeff 52%, #fffaf0 100%);
  overflow: hidden; position: relative;
}
.hero-content-area {
  flex: 1.2; display: flex; align-items: center; 
  padding: 116px 5% 96px 8%; z-index: 10; background: transparent;
}
.hero-image-area {
  flex: 0.95; position: relative; display:flex; align-items:center; justify-content:center;
  overflow: hidden; padding: clamp(96px, 12vh, 140px) 5vw 72px;
  background:
    linear-gradient(145deg, rgba(255,255,255,.48), rgba(240,253,250,.2)),
    radial-gradient(circle at center, rgba(20,184,166,.12), transparent 58%);
}
.hero-carousel {
  position: relative; z-index: 1; width: min(100%, 760px);
  aspect-ratio: 1430 / 717; border-radius: 14px;
  background: rgba(255,255,255,.9);
  box-shadow: 0 24px 60px rgba(15,118,110,.18);
  border: 1px solid rgba(13,148,136,.14);
  overflow: hidden;
}
.carousel-item {
  position: absolute; inset: 0; background-size: contain; background-position: center;
  background-repeat: no-repeat; opacity: 0; transition: opacity 1.2s ease-in-out;
}
.carousel-item.active { opacity: 1; }

/* Shadow on image edge */
.hero-image-area::before {
  content: ''; position: absolute; inset: 0; left: -1px;
  background: linear-gradient(90deg, rgba(240,253,250,.92) 0%, rgba(240,253,250,.42) 16%, transparent 34%); z-index: 2;
  pointer-events:none;
}
.hero-image-area::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at center, transparent 56%, rgba(15,118,110,0.08) 100%); z-index: 2;
  pointer-events:none;
}

.hero-content { max-width: 720px; }
.hero-label {
  display: inline-flex; align-items: center; gap: 10px; 
  background: rgba(255,255,255,.72); border: 1px solid rgba(13,148,136,.2); 
  padding: 10px 24px; border-radius: 30px; font-size: 0.85rem; 
  color: var(--accent-1); margin-bottom: 36px; font-weight: 700;
  box-shadow: 0 10px 30px rgba(13,148,136,.08);
}
.hero-label .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-3); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: 0.4 } }

.hero h1 { font-size: 4rem; font-weight: 900; line-height: 1.15; margin-bottom: 28px; color: var(--text-bright); }
.hero h1 .grad { background: var(--accent-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.25rem; color: var(--text-dim-on-dark); margin-bottom: 56px; line-height: 1.8; max-width: 640px; }
.hero-actions { display: flex; gap: 20px; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 1100px) {
  .hero { flex-direction: column; }
  .hero-content-area { flex: none; width: 100%; padding: 128px 6% 48px; }
  .hero-image-area { flex: none; width: 100%; height: auto; padding: 24px 6% 64px; }
  .hero-carousel { width: min(100%, 720px); }
  .hero-image-area::before { background: linear-gradient(0deg, rgba(240,253,250,.56) 0%, transparent 42%); }
  .hero h1 { font-size: 3rem; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 2.4rem; }
}


/* ===== GLASS CARD ===== */
.glass{background:#fff;border:1px solid #e2e8f0;box-shadow:0 12px 30px rgba(15,23,42,.06);border-radius:var(--radius);transition:var(--transition)}
.glass:hover{border-color:rgba(13,148,136,.28);box-shadow:0 18px 40px rgba(15,23,42,.1)}

/* ===== PAGE HERO ===== */
.page-hero{padding:140px 0 76px;text-align:center;position:relative;overflow:hidden;background:radial-gradient(ellipse 60% 40% at 50% 0%,rgba(20,184,166,.16),transparent),linear-gradient(180deg,#f0fdfa 0%,#f8fafc 100%);border-bottom:0}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{font-size:2.4rem;font-weight:900;color:var(--text-bright);margin-bottom:10px}
.page-hero p{color:var(--text-dim);font-size:1.05rem}

/* ===== PI PAGE ===== */
.pi-layout{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start}
.pi-photo{aspect-ratio:4/5;border-radius:var(--radius);background:#f8fafc;display:flex;align-items:center;justify-content:center;font-size:4rem;color:var(--text-dim);border:1px solid #e2e8f0;overflow:hidden;box-shadow:0 14px 34px rgba(15,23,42,.1)}
.pi-photo img{width:100%;height:100%;object-fit:cover}
.pi-info h2{font-size:1.8rem;font-weight:800;color:var(--text-bright);margin-bottom:4px}
.pi-info .title{color:var(--accent-2);font-size:1rem;margin-bottom:20px}
.pi-detail{margin-bottom:20px}
.pi-detail h3{font-size:.85rem;font-weight:700;color:var(--accent-1);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}
.pi-detail p,.pi-detail li{color:var(--text-dim);font-size:.92rem;line-height:1.8}
.pi-detail li{padding:4px 0;padding-left:16px;position:relative}
.pi-detail li::before{content:'›';position:absolute;left:0;color:var(--accent-1);font-weight:700}

/* ===== MEMBERS ===== */
.member-section{margin-bottom:56px}
.member-section h3{font-size:1.1rem;font-weight:700;color:var(--accent-2);margin-bottom:20px;padding-left:14px;border-left:3px solid var(--accent-1)}
.member-subsection{margin-top:28px}
.member-subsection:first-of-type{margin-top:0}
.member-subtitle{font-size:.95rem;font-weight:800;color:var(--text-bright);margin-bottom:14px}
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.member-card{padding:24px;text-align:center;cursor:default}
.member-card.has-photo{padding:16px;text-align:left}
.member-avatar{width:80px;height:80px;border-radius:50%;background:var(--accent-grad);margin:0 auto 14px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:700;color:#fff}
.member-photo{width:100%;aspect-ratio:4/5;border-radius:12px;object-fit:cover;background:#f1f5f9;margin-bottom:16px}
.member-photo.landscape{object-position:center}
.member-card h4{font-size:1rem;font-weight:700;color:var(--text-bright);margin-bottom:4px}
.member-card .role{font-size:.82rem;color:var(--accent-2)}
.member-card .topic{font-size:.8rem;color:var(--text-dim);margin-top:8px}
.member-note{padding:24px;text-align:center;color:var(--text-dim);font-size:.9rem}
.member-note h3,.member-note h4{color:var(--text-bright);font-size:1rem;margin-bottom:6px}

/* ===== RESEARCH ===== */
.research-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.research-card{padding:32px;position:relative;overflow:hidden;background:#fff;border:1px solid #e2e8f0;box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);}
.research-card:hover{transform: translateY(-5px); border-color: var(--accent-1); box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);}
.research-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent-grad)}
.research-card .icon{font-size:2.2rem;margin-bottom:16px;color:var(--accent-1);}
.research-card h3{font-size:1.15rem;font-weight:700;color:var(--text-bright);margin-bottom:10px}
.research-card p{font-size:.9rem;color:var(--text-dim);line-height:1.7}
.research-card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.research-card .tag{background:rgba(13,148,136,.12);color:var(--accent-1);padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:500}
.media-card{border-color:rgba(13,148,136,.16);box-shadow:0 16px 40px rgba(15,118,110,.12)}
.media-card h3{color:var(--text-bright)}
.media-card p{color:var(--text)}
.media-card .icon{color:var(--accent-1)}
.media-card .tag{background:rgba(13,148,136,.12);color:var(--accent-1)}
.research-topic-grid{display:flex;flex-direction:column;gap:28px}
.research-topic-card{display:grid;grid-template-columns:minmax(260px,38%) 1fr;overflow:hidden;border-color:rgba(13,148,136,.16)}
.research-topic-media{min-height:320px;background-size:cover;background-position:center}
.research-topic-body{padding:34px}
.research-topic-heading{display:flex;gap:16px;align-items:flex-start;margin-bottom:18px}
.research-topic-heading .icon{width:48px;height:48px;border-radius:14px;background:rgba(13,148,136,.1);display:flex;align-items:center;justify-content:center;color:var(--accent-1);font-size:1.5rem;flex-shrink:0}
.research-kicker{display:block;font-size:.75rem;font-weight:800;letter-spacing:1.6px;text-transform:uppercase;color:var(--accent-2);margin-bottom:4px}
.research-topic-body h2{font-size:1.45rem;line-height:1.25;color:var(--text-bright);font-weight:850}
.research-topic-body p{font-size:.94rem;color:var(--text);line-height:1.8;margin-top:12px}
.research-focus-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px;padding-top:22px;border-top:1px solid #e2e8f0}
.research-focus-grid h3{font-size:.86rem;color:var(--accent-1);font-weight:800;margin-bottom:6px}
.research-focus-grid p{font-size:.8rem;color:var(--text-dim);line-height:1.65;margin:0}
.research-topic-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.research-topic-card .tag{background:rgba(13,148,136,.12);color:var(--accent-1);padding:5px 12px;border-radius:20px;font-size:.76rem;font-weight:600}
.research-topic-pending .research-topic-media{background-size:cover;background-position:center}
.research-topic-pending .research-topic-body{display:flex;flex-direction:column;justify-content:center}

/* ===== PUBLICATIONS ===== */
.pub-year{font-size:1.4rem;font-weight:800;color:var(--accent-1);margin-bottom:16px;margin-top:40px}
.pub-year:first-child{margin-top:0}
.pub-list{display:flex;flex-direction:column;gap:12px}
.pub-item{padding:20px 24px;font-size:.9rem;line-height:1.7;color:var(--text-dim)}
.pub-item:hover{border-color:var(--accent-1)}
.pub-item .pub-title{color:var(--text-bright);font-weight:600}
.pub-item .pub-journal{color:var(--accent-2);font-style:italic}
.pub-item .pub-doi{color:var(--accent-1);font-size:.82rem}
.pub-item .pub-doi:hover{text-decoration:underline}

/* ===== EVENTS ===== */
.events-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.event-placeholder{aspect-ratio:4/3;border-radius:var(--radius);background:linear-gradient(135deg,rgba(20,184,166,.1),rgba(56,189,248,.08));border:2px dashed var(--border-glass);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-dim);font-size:.9rem;gap:8px}
.event-card{overflow:hidden;background:#fff;border:1px solid #e2e8f0;border-radius:var(--radius);box-shadow:0 12px 30px rgba(15,23,42,.06)}
.event-card img{width:100%;aspect-ratio:4/3;object-fit:cover;background:#f8fafc}
.event-card .event-body{padding:18px}
.event-card h3{font-size:1rem;color:var(--text-bright);margin-bottom:4px}
.event-card p{font-size:.85rem;color:var(--text-dim)}

/* ===== CONTACT ===== */
.contact-section{background:linear-gradient(180deg,#ffffff 0%,#f0fdfa 100%)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-items{display:flex;flex-direction:column;gap:20px}
.contact-item{display:flex;gap:18px;align-items:flex-start;padding:28px;border-color:rgba(13,148,136,.16);box-shadow:0 16px 34px rgba(15,118,110,.08)}
.contact-item:hover{border-color:rgba(13,148,136,.36);box-shadow:0 22px 44px rgba(15,118,110,.12)}
.contact-icon{width:48px;height:48px;border-radius:12px;background:var(--accent-grad);display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.contact-icon{color:#fff}
.contact-item h3{font-size:.95rem;font-weight:800;color:var(--accent-1);margin-bottom:2px}
.contact-item p{font-size:.88rem;color:var(--text-dim)}
.contact-map{border-radius:var(--radius);overflow:hidden;border:1px solid rgba(13,148,136,.18);box-shadow:0 18px 42px rgba(15,118,110,.1);background:#fff}
.contact-map iframe{display:block;width:100%;height:400px;border:none;background:#e2e8f0}

/* ===== FOOTER ===== */
.footer{border-top:1px solid #e2e8f0;padding:60px 0;margin-top:40px;background:#f8fafc}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:40px}
.footer-brand{font-weight:800;color:var(--text-bright);font-size:1rem}
.footer-nav{display:flex;gap:32px}
.footer-nav a{font-size:.88rem;color:var(--text-dim);transition:var(--transition);font-weight:500}
.footer-nav a:hover{color:var(--accent-1)}
.footer-copy{width:100%;text-align:center;font-size:.82rem;color:var(--text-dim);margin-top:40px;padding-top:20px;border-top:1px solid #e2e8f0;}

/* ===== ANIMATIONS ===== */
.fade-in{opacity:1;transform:none}
.fade-in.visible{opacity:1;transform:none}

/* ===== RESPONSIVE ===== */
@media(max-width:1180px){
  .nav-links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:rgba(255,255,255,.98);backdrop-filter:blur(16px);flex-direction:column;padding:16px;gap:4px;border-bottom:1px solid var(--border-glass);box-shadow:0 20px 42px rgba(15,118,110,.12)}
  .nav-links.open{display:flex}
  .hamburger{display:flex}
  .lang-switch{margin:8px 0 0;padding:12px 0 0;border-left:0;border-top:1px solid rgba(13,148,136,.16)}
  .hero h1{font-size:2.2rem}
  .pi-layout{grid-template-columns:1fr}
  .pi-photo{max-width:260px;margin:0 auto}
  .contact-grid{grid-template-columns:1fr}
  .research-topic-card{grid-template-columns:1fr}
  .research-topic-media{min-height:260px}
  .research-focus-grid{grid-template-columns:1fr}
}
@media(max-width:600px){
  .section{padding:60px 0}
  .page-hero + .section{padding-top:72px}
  .hero h1{font-size:1.7rem}
  .hero p{font-size:1rem}
  .section-title{font-size:1.6rem}
  .hero-actions{flex-direction:column}
  .research-grid{grid-template-columns:1fr}
  .member-grid{grid-template-columns:1fr}
  .research-topic-body{padding:24px}
  .research-topic-heading{gap:12px}
  .events-grid{grid-template-columns:1fr}
}

/* ===== LUCIDE ICONS ===== */
.lucide {
  width: 1em;
  height: 1em;
  stroke-width: 2;
  vertical-align: text-bottom;
}