:root{
  --navy:#1e40af;
  --deep:#172554;
  --blue:#60a5fa;
  --soft:#eff6ff;
  --orange:#ff8a3d;
  --text:#0f172a;
  --muted:#475569;
  --line:#dbeafe;
  --shadow:0 16px 40px rgba(30,64,175,.10);
  --r:18px;
  --max:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Segoe UI","PingFang TC","Microsoft JhengHei",sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#f6fbff 0%,#ffffff 28%);
  line-height:1.75;
}
a{text-decoration:none;color:inherit}
.container{width:min(var(--max),calc(100% - 32px));margin:0 auto}

.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(30,64,175,.12);
}
.nav{min-height:98px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:900;
  color:var(--navy);
}
.brand-logo{height:70px;width:auto;display:block}
.brand-name{
  white-space:nowrap;
  font-size:1.26rem;
  letter-spacing:.2px;
  line-height:1;
}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--navy);border-radius:999px}

.nav-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.nav-links a{font-weight:700}

.nav-dropdown{
  position:relative;
  z-index:120;
  padding:8px 0;
  margin:-8px 0;
}
.nav-dropbtn{
  font:inherit;
  font-weight:700;
  background:transparent;
  border:0;
  padding:10px 10px;
  cursor:pointer;
  color:var(--text);
  position:relative;
}
.nav-dropbtn::before{
  content:"";
  position:absolute;
  left:-6px;
  right:-6px;
  top:-8px;
  bottom:-8px;
}
.nav-dropmenu{
  display:none;
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  min-width:240px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--shadow);
  padding:8px;
  z-index:999;
}
.nav-dropdown::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:100%;
  height:12px;
}
.nav-dropmenu a{
  display:block;
  padding:10px 12px;
  border-radius:12px;
  position:relative;
}
.nav-dropmenu a::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-4px;
  bottom:-4px;
}
.nav-dropmenu a:hover{background:var(--soft)}
.nav-dropdown:hover .nav-dropmenu,
.nav-dropdown.is-open .nav-dropmenu{display:block}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:13px 20px;
  border-radius:999px;
  font-weight:800;
}
.btn-primary{background:var(--navy);color:#fff;box-shadow:var(--shadow)}
.btn-secondary{background:var(--orange);color:#fff;box-shadow:var(--shadow)}
.btn-outline{background:#fff;border:1px solid var(--blue);color:var(--navy)}

.hero{
  padding:64px 0 32px;
  background:
    radial-gradient(circle at top right,rgba(96,165,250,.20),transparent 30%),
    radial-gradient(circle at top left,rgba(255,138,61,.14),transparent 26%);
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:24px;align-items:center}
.eyebrow{display:inline-block;padding:8px 14px;border-radius:999px;background:var(--soft);color:var(--navy);font-weight:800;margin-bottom:14px}
h1{font-size:clamp(2rem,4vw,3rem);line-height:1.2;margin:0 0 16px;color:var(--navy)}
h2{font-size:clamp(1.45rem,3vw,1.95rem);line-height:1.28;margin:0 0 14px;color:var(--navy)}
h3{font-size:1.06rem;margin:0 0 10px;color:var(--navy)}
.lead{font-size:1.04rem;color:var(--muted);margin:0 0 18px}

.section{padding:32px 0}
.card,.hero-card,.faq,.policy,.quote{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:var(--shadow);
  padding:22px;
}
.grid-2,.grid-3,.grid-4,.quotes{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.quotes{grid-template-columns:repeat(3,minmax(0,1fr))}
.list{padding-left:18px;margin:10px 0 0}
.list li{margin:8px 0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.tag{display:inline-flex;padding:6px 11px;border-radius:999px;background:var(--soft);color:var(--navy);font-size:.88rem;font-weight:700}
.breadcrumbs{padding-top:18px;font-size:.92rem;color:var(--muted)}
.breadcrumbs a{color:var(--blue)}
.cta-band{margin-top:18px;padding:28px;border-radius:24px;background:linear-gradient(135deg,var(--navy) 0%,#1d4ed8 100%);color:#fff;box-shadow:var(--shadow)}
.cta-band h2{color:#fff}

/* 課程圖片（統一比例 + 呼吸感） */
.course-media{
  width:100%;
  border-radius:16px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:linear-gradient(180deg,var(--soft) 0%,#ffffff 100%);
}
.course-media img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.course-media-16x9{aspect-ratio:16/9}
.course-media-4x3{aspect-ratio:4/3}
.hero-side{display:grid;gap:14px}
.course-section-media{margin:14px 0 0}

/* 首頁課程展示區 */
.course-showcase-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:18px;
  margin-top:14px;
}
.course-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.course-card-body{padding:16px 18px}
.course-card-title{margin:0;color:var(--navy);font-weight:900;font-size:1.02rem;line-height:1.35}
.course-card .btn{margin-top:10px}

.footer{margin-top:30px;background:var(--deep);color:#dbeafe;padding:28px 0 86px}
.footer-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
}
.footer-logo{height:64px;width:auto;display:block}
.footer-name{font-weight:900;color:#fff;font-size:1.08rem;letter-spacing:.2px;line-height:1.1}
.copyright{color:#bfdbfe}
.footnote{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}

.page-logo{height:44px;width:auto;display:block;margin:10px 0 0}
.footer-grid{display:grid;gap:16px}
.footer-3col{grid-template-columns:repeat(3,minmax(0,1fr))}
.footer-4col{
  grid-template-columns:minmax(0,1.55fr) minmax(0,.82fr) minmax(0,.82fr) minmax(0,.82fr);
  column-gap:4px;
  row-gap:16px;
  align-items:start;
}
.footer-4col > :first-child{margin-right:34px}
.footer h3{
  color:#fff;
  margin-bottom:8px;
  font-size:15px;
  font-weight:800;
  line-height:1.3;
}
.footer a{
  display:block;
  padding:2px 0;
  color:#dbeafe;
  font-size:13px;
  font-weight:400;
  line-height:1.8;
}
.footer-group{margin-top:12px}
.footer-group:first-of-type{margin-top:0}
.footer-group-title{
  color:#bfdbfe;
  font-weight:800;
  font-size:14px;
  line-height:1.35;
  margin-bottom:2px;
}
.footer-course-columns{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:18px;
  align-items:start;
}
.footer-course-col{min-width:0}
.footnote{
  border-top:1px solid rgba(255,255,255,.12);
  margin-top:14px;
  padding-top:12px;
  font-size:12px;
  line-height:1.6;
}

.floating{
  position:fixed;right:18px;bottom:18px;z-index:60;
  width:68px;height:68px;border-radius:999px;
  background:#1dbf61;color:#fff;
  display:flex;align-items:center;justify-content:center;
  padding:6px;
  overflow:hidden;
  text-align:center;
  font-size:10.5px;
  font-weight:800;
  line-height:1.05;
  box-shadow:0 14px 30px rgba(29,191,97,.35)
}
.floating span{
  display:block;
  max-width:56px;
  white-space:normal;
  word-break:normal;
  overflow-wrap:normal;
}
.subtle{color:var(--muted)}
.notice{padding:14px 16px;border-left:4px solid var(--orange);background:#fff8f2;border-radius:12px}

/* 表格（例如到校STEM合作的「核心課程體系」） */
.table-wrap{overflow:auto;-webkit-overflow-scrolling:touch}
.data-table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r);
  min-width:720px;
}
.data-table th,.data-table td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.data-table th{
  background:var(--soft);
  color:var(--navy);
  font-weight:800;
}
.data-table tr:last-child td{border-bottom:0}

@media (max-width: 960px){
  .hero-grid,.grid-4,.grid-3,.split,.quotes,.footer-3col,.footer-4col{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .nav-toggle{display:inline-flex}
  .nav{align-items:center}
  .nav-links{
    display:none;
    width:100%;
    padding:10px 0 12px;
    flex-direction:column;
    align-items:flex-start;
    gap:6px;
  }
  .nav-links.is-open{display:flex}
  .nav-dropdown{width:100%;padding:0;margin:0;z-index:auto}
  .nav-dropbtn{width:100%;text-align:left;padding:10px 0}
  .nav-dropbtn::before,
  .nav-dropdown::after,
  .nav-dropmenu a::before{display:none}
  .nav-dropmenu{
    position:static;
    display:none;
    width:100%;
    margin-top:6px;
    box-shadow:none;
    border-radius:14px;
  }
  .nav-dropmenu.is-open{display:block}
  .nav-dropdown:hover .nav-dropmenu{display:none}
  .data-table{min-width:640px}
  .brand-logo{height:38px}
  .brand-name{font-size:1.05rem}
}

@media (max-width: 640px){
  .container{width:min(var(--max),calc(100% - 22px))}
  .floating{width:62px;height:62px;right:14px;bottom:14px}
  .floating{font-size:10px;padding:6px}
  .floating span{max-width:52px}
  .brand-logo{height:36px}
  .brand-name{font-size:1rem}
  .footer-name{font-size:1.02rem}
  .footer{padding:24px 0 82px}
  .footer-grid{gap:12px}
  .footer h3{font-size:14px;margin-bottom:6px}
  .footer-group{margin-top:10px}
  .footer-group-title{font-size:13px;margin-bottom:2px}
  .footer-course-columns{grid-template-columns:1fr;gap:10px}
  .footer a{font-size:12px;line-height:1.7;padding:1px 0}
  .footnote{margin-top:12px;padding-top:10px;font-size:11.5px}
}

@media (max-width: 420px){
  .brand-name{display:none}
}