:root { --primary: #FBBF24; --secondary: #2563EB; --text: #374151; --light: #F9FAFB; }
* { margin:0; padding:0; box-sizing:border-box; font-family:'Inter', sans-serif; }
body { background:#fff; color:var(--text); line-height:1.6; padding-top:70px; }
header { background:rgba(255,255,255,0.95); backdrop-filter:blur(10px); padding:15px 5%; display:grid; grid-template-columns: 180px 1fr 200px 180px; align-items:center; position:fixed; width:100%; top:0; z-index:1000; border-bottom:1px solid #eee; gap: 10px; }
.logo { text-decoration:none; color:#000; display:flex; align-items:center; font-weight:800; font-size:20px; justify-self: start; }
nav { justify-self: center; display: flex; align-items: center; }
nav a { text-decoration:none; color:var(--text); margin:0 10px; font-weight:600; font-size:14px; white-space: nowrap; }

.search-box { position: relative; width: 100%; max-width: 200px; justify-self: center; }
.search-box input { margin-bottom: 0; padding: 8px 12px; font-size: 14px; border-radius: 20px; background: #f3f4f6; border: 1px solid transparent; width: 100%; }
.search-box input:focus { outline: none; border-color: var(--secondary); background: #fff; }
.search-results { position: absolute; top: 110%; left: 0; right: 0; background: #fff; border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); max-height: 300px; overflow-y: auto; display: none; z-index: 1001; border: 1px solid #eee; }
.search-item { padding: 12px 15px; border-bottom: 1px solid #f0f0f0; cursor: pointer; transition: 0.2s; }
.search-item:hover { background: #f8fafc; }
.search-item .title { font-weight: 700; font-size: 14px; color: var(--secondary); display: block; }
.search-item .type { font-size: 11px; background: #e2e8f0; padding: 2px 6px; border-radius: 4px; color: #64748b; margin-top: 4px; display: inline-block; }

.lang-switch { justify-self: end; display: inline-flex; gap: 8px; font-weight: 800; font-size: 12px; color: #2563EB; white-space: nowrap; }

.hero { position: relative; height: 100vh; min-height: 500px; display: flex; align-items: center; justify-content: center; overflow: hidden; background: #000; padding: 0; clip-path: none; }
#hero-video { position: absolute; top: 50%; left: 50%; min-width: 100%; min-height: 100%; width: auto; height: auto; z-index: 0; transform: translate(-50%, -50%); object-fit: cover; opacity: 0.7; pointer-events: none; }
.hero::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: #000; z-index: -1; }
.hero-content { position: relative; z-index: 10; text-align: center; color: #fff; padding: 20px; max-width: 900px; pointer-events: auto; }
.hero h1 { font-size: clamp(28px, 4vw, 48px); font-weight: 800; margin-bottom: 20px; color: #fff; text-shadow: 0 2px 10px rgba(0,0,0,0.5); line-height: 1.2; }
.hero p { font-size: 20px; font-weight: 600; color: var(--primary); margin-bottom: 25px; text-shadow: 0 1px 5px rgba(0,0,0,0.5); }

.hero-list { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; margin-bottom: 30px; }
.hero-list li { background: rgba(255,255,255,0.1); backdrop-filter: blur(5px); padding: 10px 20px; border-radius: 50px; font-weight: 700; font-size: 16px; border: 1px solid rgba(255,255,255,0.2); transition: 0.3s; }
.hero-list li:hover { background: var(--secondary); transform: scale(1.05); border-color: transparent; }

.hero-footer { font-size: 16px !important; font-weight: 500 !important; color: #ddd !important; max-width: 700px; margin: 0 auto 30px !important; line-height: 1.5; text-shadow: 0 1px 3px rgba(0,0,0,0.8); }

.section { padding:80px 10%; }
.alt-bg { background:var(--light); }
.section-title { text-align:center; margin-bottom:40px; font-size:32px; font-weight:800; }

.grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(260px, 1fr)); gap:30px; }
.card { background:#fff; padding:40px; border-radius:20px; box-shadow:0 10px 15px rgba(0,0,0,0.05); text-align:center; transition:0.3s; }
.card:hover { transform: translateY(-10px); }
.card i { font-size:40px; color:var(--secondary); margin-bottom:20px; display:block; }
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }

.download-link {
    display: inline-block;
    padding: 10px 20px;
    background: #2563EB;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.3s;
}

.download-link:hover {
    background: #1D4ED8;
}

.qr-box {
    margin: 15px auto;
    display: flex;
    justify-content: center;
}

.support-grid { max-width:950px; margin:0 auto; }
.faq-container { 
    max-width: 950px; 
    margin: 0 auto; 
    max-height: 550px; 
    overflow-y: auto; 
    padding: 15px;
    background: #f8fafc;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.cat-title { margin:40px 0 20px; font-weight:800; font-size:20px; color:var(--secondary); border-left:5px solid var(--primary); padding-left:15px; }
.item-box { background:#fff; border-radius:12px; border:1px solid #f0f0f0; overflow:hidden; flex-shrink: 0; }
.item-header { padding:18px 25px; cursor:pointer; display:flex; justify-content:space-between; align-items:center; font-weight:700; font-size:15px; transition: 0.3s; }
.item-header:hover { background: #fffbeb; }
.item-content { max-height:0; overflow:hidden; transition:0.3s ease-out; background:#fafafa; }
.item-box.active .item-content { max-height:2000px; padding:15px 25px 25px; border-top:1px solid #f0f0f0; }

.doc-list { list-style:none; }
.doc-list li { padding:10px 0; border-bottom:1px solid #eee; }
.doc-list a { text-decoration:none; color:var(--secondary); font-size:14px; font-weight:600; display:block; }
.doc-list a:hover { color: var(--primary); }

.registration { max-width:600px; margin:40px auto; background:#fff; padding:40px; border-radius:24px; box-shadow:0 20px 25px rgba(0,0,0,0.1); width: 90%; }
input { width:100%; padding:15px; border:1px solid #ddd; border-radius:12px; margin-bottom:20px; font-size:16px; display: block; }
.btn-primary { background:var(--secondary); color:#fff; border:none; border-radius:12px; font-weight:700; cursor:pointer; font-size:16px; padding: 16px 40px; display: inline-block; text-decoration: none; }

footer { background:#111827; color:#fff; padding:60px 10%; text-align:center; }
@media (max-width: 992px) { 
    header { 
        grid-template-columns: 1fr auto auto; 
        padding: 10px 3%; 
    }
    nav { display: none; } /* 隱藏桌面型導航 */
    .search-box { max-width: 150px; }
}

@media (max-width: 480px) {
    header { 
        grid-template-columns: auto 1fr auto; 
    }
    .logo span { display: none; } /* 手機端只顯示圖標以騰出空間 */
    .search-box { max-width: 120px; }
    .lang-switch { gap: 4px; font-size: 11px; }
}