/* NCKU CSAP 實驗室網站樣式 */
:root{
  --accent:#1bb0ce; --accent-dark:#0e8aa3; --ink:#1f2a37; --text:#3d3d3d;
  --muted:#6b7685; --bg:#f5f7fa; --card:#ffffff; --line:#e3e8ee;
  --shadow:0 10px 18px rgba(118,133,151,.21);
  --font:'Inter','Noto Sans TC','PingFang TC','Microsoft JhengHei',system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;font-size:17px}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-dark);text-decoration:none}
a:hover{color:var(--accent)}
.wrap{width:min(1140px,calc(100% - 32px));margin:0 auto}
.section{padding:42px 0 64px}
.card{background:var(--card);border-radius:10px;box-shadow:var(--shadow);padding:30px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{display:flex;flex-direction:column;line-height:1.2;padding:8px 0}
.brand-mark{font-weight:800;font-size:22px;color:var(--ink);letter-spacing:.5px}
.brand-mark::after{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-left:6px}
.brand-sub{font-size:12px;color:var(--muted)}
.site-nav{margin-left:auto}
.site-nav ul{list-style:none;display:flex;align-items:center;gap:4px;margin:0;padding:0}
.site-nav a{display:block;padding:10px 13px;color:var(--ink);font-weight:600;font-size:15.5px;border-radius:8px}
.site-nav a:hover{background:#eef7fa;color:var(--accent-dark)}
.site-nav a.active{color:var(--accent-dark);box-shadow:inset 0 -3px 0 var(--accent)}
.lang-switch{flex:none}
.lang-switch a{border:1.5px solid var(--accent);color:var(--accent-dark);border-radius:999px;padding:6px 14px;margin-left:8px;white-space:nowrap;line-height:1.4}
.nav-toggle,.nav-burger{display:none}

/* ---------- hero / page band ---------- */
.hero{background:linear-gradient(135deg,#0d3b53 0%,#11607e 55%,var(--accent) 130%);color:#fff;padding:84px 0 88px;text-align:center}
.hero-kicker{letter-spacing:4px;font-weight:700;color:#9fe3f2;margin:0 0 14px;font-size:15px}
.hero h1{font-size:clamp(28px,4.2vw,46px);margin:0 0 10px;line-height:1.3}
.hero-alt{font-size:clamp(16px,2vw,22px);color:#cdeef7;margin:0 0 26px}
.hero-sub{color:#9fc6d6;font-size:15px;margin:0}
.page-band{background:linear-gradient(135deg,#0d3b53,#11607e);color:#fff;padding:42px 0;margin-bottom:8px}
.page-band h1{margin:0;font-size:clamp(24px,3vw,34px)}
.seg-btns{margin-top:18px;display:flex;gap:10px}
.seg-btns a{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.45);padding:8px 22px;border-radius:999px;font-weight:600}
.seg-btns a.on,.seg-btns a:hover{background:#fff;color:var(--accent-dark);border-color:#fff}

/* ---------- home cards ---------- */
.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.home-card{position:relative;display:block;color:var(--text);transition:transform .15s ease}
.home-card:hover{transform:translateY(-4px)}
.home-card h3{margin:0 0 8px;color:var(--ink);font-size:20px}
.home-card p{margin:0;color:var(--muted);font-size:15px}
.home-card .more{position:absolute;right:22px;bottom:14px;color:var(--accent);font-weight:700}

/* ---------- publications ---------- */
.pub-layout{display:grid;grid-template-columns:210px 1fr;gap:26px;align-items:start}
.year-nav{position:sticky;top:84px;padding:22px}
.year-nav h3{margin:0 0 12px;color:var(--ink);font-size:17px}
.year-links{display:flex;flex-direction:column;gap:2px;max-height:62vh;overflow:auto}
.year-links a{padding:5px 10px;border-radius:6px;color:var(--text);font-weight:600;font-size:15px}
.year-links a:hover{background:#eef7fa;color:var(--accent-dark)}
.year-title{color:#313131;font-size:24px;letter-spacing:.5px;margin:34px 0 16px;scroll-margin-top:84px}
.year-title:first-child{margin-top:0}
.pub-card{margin:0 0 20px;padding:26px 30px}
.pub-card p{margin:0;font-size:17px;line-height:1.65}
.pub-no{color:var(--accent);font-weight:800;margin-right:2px}
.hl-name{font-weight:700;text-decoration:underline}
.pub-list-full{max-width:980px}

/* ---------- PI ---------- */
.pi-head{display:flex;gap:34px;align-items:center;margin-bottom:26px;flex-wrap:wrap}
.pi-photo{width:190px;height:190px;object-fit:cover;border-radius:12px}
.pi-name{margin:0;font-size:30px;color:var(--ink)}
.pi-title{color:var(--accent-dark);font-weight:700;margin:6px 0 14px}
.pi-contact{list-style:none;margin:0;padding:0;color:var(--muted)}
.pi-section{margin-bottom:22px}
.pi-section h2{margin:0 0 12px;font-size:21px;color:var(--ink);border-left:4px solid var(--accent);padding-left:12px}
.pi-section ul{margin:0;padding-left:22px}
.pi-section li{margin:4px 0}

/* ---------- members ---------- */
.group-title{color:var(--ink);font-size:24px;margin:34px 0 18px}
.group-title:first-child{margin-top:0}
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:20px}
.member-card{text-align:center;padding:26px 20px}
.member-card img{width:130px;height:130px;object-fit:cover;border-radius:50%;margin:0 auto 14px;background:#eef1f5}
.member-card h3{margin:0;font-size:19px;color:var(--ink)}
.m-alt{color:var(--muted);font-size:14px;margin:2px 0 8px}
.m-mail{font-size:13.5px;color:var(--accent-dark);word-break:break-all;margin:6px 0 0}
.m-res{font-size:14px;color:var(--text);margin:8px 0 0}

/* ---------- research / results / equipment ---------- */
.topic-card{margin-bottom:26px}
.topic-card h2{margin:0 0 14px;font-size:21px;color:var(--ink);line-height:1.5;border-left:4px solid var(--accent);padding-left:12px}
.topic-card figure{margin:18px 0 0}
.topic-card figure img{margin:0 auto;border-radius:8px}
.topic-card figcaption{font-size:15px;color:var(--muted);margin-top:10px;line-height:1.7}
.result-card{display:grid;grid-template-columns:320px 1fr;gap:26px;margin-bottom:24px;align-items:center}
.result-card img{border-radius:8px;width:100%;object-fit:contain}
.result-card h2{margin:0 0 10px;font-size:20px;color:var(--ink);line-height:1.45}
.result-card p{margin:0;font-size:15.5px}
.equip-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.equip-card{padding:12px}
.equip-card img{border-radius:6px;width:100%;height:230px;object-fit:cover}

/* ---------- footer ---------- */
.site-footer{background:#15212f;color:#c6cfdb;margin-top:30px;padding:44px 0 18px;font-size:14.5px}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:26px}
.foot-block h3{color:#fff;font-size:16px;margin:0 0 8px;line-height:1.6}
.foot-block p{margin:0;line-height:1.8}
.foot-copy{border-top:1px solid #2a394d;margin-top:30px;padding-top:16px;color:#8595a9;font-size:13px}

/* ---------- mobile ---------- */
@media (max-width:920px){
  .nav-burger{display:flex;flex-direction:column;gap:5px;margin-left:auto;cursor:pointer;padding:10px}
  .nav-burger span{width:24px;height:2.5px;background:var(--ink);border-radius:2px}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-toggle:checked ~ .site-nav{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;padding:10px 16px 16px}
  .site-nav a{padding:13px 10px;font-size:17px}
  .lang-switch a{display:inline-block;margin:8px 0 0}
  .pub-layout{grid-template-columns:1fr}
  .year-nav{position:static}
  .year-links{flex-direction:row;flex-wrap:wrap;max-height:none}
  .result-card{grid-template-columns:1fr}
  .pi-head{justify-content:center;text-align:center}
  .pub-card{padding:20px}
  body{font-size:16px}
}