:root{
  --bg: #0b1220;
  --surface: #111a2e;
  --surface-2: #0f1728;
  --text: #e6eefc;
  --muted: #a7b3c9;
  --accent: #6ee7b7; /* mint */
  --primary: #7dd3fc; /* sky */
  --ring: rgba(125,211,252,.35);
  --card: #121a2b;
  --border: #1f2a44;
  --shadow: rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height:1.6;
  color:var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, #173053 0%, transparent 60%), var(--bg);
}

.container{
  max-width:1100px;
  margin:0 auto;
  padding:0 20px;
}

/* Header */
.site-header{
  position:sticky; top:0; z-index:50;
  background:linear-gradient(180deg, rgba(11,18,32,.9), rgba(11,18,32,.6));
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none; color:var(--text)}
.brand-logo{width:42px; height:42px; object-fit:contain}
.brand-title{font-weight:800; text-transform:uppercase; letter-spacing:.02em; font-size:18px}
.brand-subtitle{display:block; font-size:12px; color:var(--muted); letter-spacing:.08em; text-transform:uppercase}

.nav-list{display:flex; gap:20px; list-style:none; margin:0; padding:0}
.nav-list a{color:var(--muted); text-decoration:none; font-weight:600}
.nav-list a:hover{color:var(--text)}
.menu-toggle{display:none; font-size:22px; background:none; border:none; color:var(--text)}

/* Hero */
.hero{padding:80px 0 60px; position:relative; overflow:hidden}
.hero-inner{display:grid; grid-template-columns:1.2fr 1fr; gap:32px; align-items:center}
.hero-text h1{font-size:44px; line-height:1.15; margin:0 0 10px}
.hero-text p{color:var(--muted); font-size:18px; margin:0 0 22px}
.cta-row{display:flex; gap:12px}
.btn{display:inline-block; padding:12px 18px; border-radius:14px; text-decoration:none; font-weight:700; border:1px solid var(--border); background:var(--surface); color:var(--text); box-shadow:0 6px 24px var(--shadow)}
.btn.primary{background:linear-gradient(180deg, var(--primary), #60a5fa); color:#051427; border-color:transparent}
.btn.ghost{background:transparent}
.btn:hover{transform:translateY(-1px)}
.hero-art{position:relative; height:320px; border-radius:18px; background:linear-gradient(180deg, var(--surface), var(--surface-2)); border:1px solid var(--border);}
.hero-art .grid{position:absolute; inset:0; background-image:linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px); background-size:34px 34px; opacity:.35}

/* Sections */
.section{padding:70px 0}
.section.dark{background:linear-gradient(180deg, rgba(17,26,46,.65), rgba(17,26,46,.35)); border-top:1px solid var(--border); border-bottom:1px solid var(--border)}
h2{font-size:30px; margin:0 0 14px}
h3{margin:0 0 10px}
p.tight{margin-top:6px}

.two-col{display:grid; grid-template-columns:1.05fr .95fr; gap:24px; align-items:start}
.card{background:var(--card); border:1px solid var(--border); border-radius:18px; padding:18px; box-shadow:0 12px 36px var(--shadow)}
.card.accent{border-color:rgba(110,231,183,.3); box-shadow:0 10px 30px rgba(110,231,183,.08)}
.checklist{list-style:none; padding-left:0; margin:0}
.checklist li{padding-left:24px; position:relative; margin:8px 0}
.checklist li::before{content:"✔"; position:absolute; left:0; opacity:.8; color:var(--accent)}

.cards{display:grid; grid-template-columns:repeat(3,1fr); gap:18px}
.cards .card p{color:var(--muted)}

.bullets{margin:8px 0 0}
.bullets li{margin:6px 0}

.stats{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:8px}
.stats .num{display:block; font-weight:800; font-size:24px}
.stats .label{display:block; color:var(--muted); font-size:12px}

.feature-list{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.feature{background:var(--card); border:1px solid var(--border); border-radius:16px; padding:16px}
.feature h4{margin:0 0 6px}

/* Contact form */
form.card label{display:flex; flex-direction:column; gap:8px; margin:10px 0}
input, textarea{
  width:100%; padding:12px 14px; border-radius:12px; background:var(--surface); border:1px solid var(--border); color:var(--text);
  outline:none; box-shadow:0 0 0 0 var(--ring); transition: box-shadow .15s ease, border-color .15s ease;
}
input:focus, textarea:focus{box-shadow:0 0 0 6px var(--ring); border-color: #2c436f}

.form-status{min-height:22px; font-size:14px; color:var(--accent); margin-top:8px}

/* Footer */
.site-footer{border-top:1px solid var(--border); padding:22px 0; background:rgba(11,18,32,.7)}
.footer-inner{display:flex; align-items:center; justify-content:space-between}
.footer-inner .links{display:flex; gap:16px}
.copy{color:var(--muted)}

/* Responsive */
@media (max-width: 980px){
  .hero-inner, .two-col{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr 1fr}
  .feature-list{grid-template-columns:1fr 1fr}
}
@media (max-width: 640px){
  .nav-list{display:none}
  .menu-toggle{display:block}
  .cards{grid-template-columns:1fr}
  .feature-list{grid-template-columns:1fr}
}
.nav-list.open{display:flex; flex-direction:column; position:absolute; right:16px; top:62px; background:var(--surface); padding:12px; border-radius:12px; border:1px solid var(--border);}

.hero {
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #000; /* 背景色，避免圖片透明時露出白底 */
}

.hero-banner {
    width: 100%;
    max-width: 1200px;
    height: auto;
}