:root{--ink:#111827;--muted:#6B7280;--blue:#2563EB;--bg:#F3F4F6;--card:#fff;--line:#E5E7EB}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,"PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;color:var(--ink);background:#fff;line-height:1.6;font-size:17px}
a{color:var(--blue)}.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:10}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{font-weight:800;font-size:18px}nav a{margin-left:20px;color:var(--ink);text-decoration:none;font-size:15px}
.btn{display:inline-block;background:var(--blue);color:#fff;padding:12px 22px;border-radius:12px;font-weight:700;text-decoration:none}.btn.ghost{background:#fff;color:var(--ink);border:1px solid #D1D5DB}.btn.line{background:#06C755}
.hero{padding:72px 0 40px;background:linear-gradient(180deg,#EEF2F7,#fff)}.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.2;margin:0 0 16px;letter-spacing:-.01em}.hero p.lead{font-size:20px;color:#374151;max-width:640px;margin:0 0 28px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.dl{display:flex;gap:10px;flex-wrap:wrap}.dl .btn{background:#111827}.dl .btn.hot{background:var(--blue);box-shadow:0 6px 18px rgba(37,99,235,.35)}.dlnote{color:var(--muted);font-size:13px;margin-top:8px}.hero .note{color:var(--muted);font-size:14px;margin-top:12px}
.shot{margin:40px auto 0;border-radius:16px;box-shadow:0 30px 60px rgba(17,24,39,.18);border:1px solid var(--line);overflow:hidden;max-width:1040px}.shot img{display:block;width:100%}
section{padding:64px 0}h2{font-size:32px;margin:0 0 8px}.sub{color:var(--muted);margin:0 0 32px;font-size:18px}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}.card h3{margin:0 0 6px;font-size:19px}.card p{margin:0;color:#374151;font-size:15px}.card .ic{font-size:28px;margin-bottom:8px}
.feature{display:grid;gap:32px;align-items:center;grid-template-columns:1fr 1fr;margin-bottom:56px}.feature:nth-child(even) .txt{order:2}.feature img{width:100%;border-radius:14px;border:1px solid var(--line);box-shadow:0 16px 40px rgba(17,24,39,.12)}.feature h3{font-size:24px;margin:0 0 8px}.feature p{color:#374151;margin:0}
@media(max-width:800px){.feature{grid-template-columns:1fr}.feature:nth-child(even) .txt{order:0}}
.price{background:var(--ink);color:#fff;border-radius:24px;padding:48px 32px;display:grid;gap:24px;grid-template-columns:1fr 1fr;align-items:center}.price .big{font-size:56px;font-weight:900;line-height:1}.price small{color:#9CA3AF;font-size:15px}.price ul{margin:16px 0 0;padding-left:20px;color:#D1D5DB;font-size:15px}
@media(max-width:800px){.price{grid-template-columns:1fr}}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}.faq summary{font-weight:700;cursor:pointer;font-size:17px}.faq p{color:#374151;margin:8px 0 0;font-size:15px}
footer{border-top:1px solid var(--line);padding:32px 0;color:var(--muted);font-size:14px}footer a{color:var(--muted)}
.tag{display:inline-block;background:#EFF6FF;color:#1E40AF;border-radius:999px;padding:4px 12px;font-size:13px;font-weight:700;margin-bottom:14px}
/* ---- 手機與細節優化 ---- */
:root{--radius:14px}
h1,h2,h3,.hero p.lead{text-wrap:balance}
:target,section[id]{scroll-margin-top:76px}
header .wrap{gap:12px}
.logo{white-space:nowrap;font-size:17px}
nav{display:flex;align-items:center;gap:18px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
nav::-webkit-scrollbar{display:none}
nav a{margin:0;white-space:nowrap}
.btn{border:1px solid transparent;transition:transform .08s ease,box-shadow .15s ease}
.btn:active{transform:translateY(1px)}
.dl{gap:10px}
.dl .btn{flex:0 0 auto}
.dl .btn.ghost{background:#fff;color:var(--ink);border:1px solid #D1D5DB}
.dl .btn.hot{order:-1}
.more-os{background:none;border:0;color:var(--blue);font:inherit;font-size:14px;padding:6px 0;cursor:pointer;text-decoration:underline}
@media(max-width:640px){
  body{font-size:16px}
  section{padding:44px 0}
  .hero{padding:40px 0 28px}
  .hero p.lead{font-size:17px;margin-bottom:22px}
  h2{font-size:25px}
  .sub{font-size:16px;margin-bottom:24px}
  header .wrap{height:54px}
  .logo{font-size:16px}
  nav{gap:14px;margin-left:8px}
  nav a{font-size:14px}
  .wrap{padding:0 16px}
  .btn{display:block;width:100%;text-align:center;padding:14px 18px}
  .hero .cta{gap:10px}
  .hero .cta .btn{width:auto;flex:1 1 0;min-width:0;padding:12px 10px;font-size:15px}
  /* 手機只顯示偵測到的系統，其餘收在「其他系統」後面 */
  .dl{flex-direction:column}
  .dl[data-collapsed="1"] .btn:not(.hot){display:none}
  .price{padding:32px 20px;border-radius:18px}
  .price .big{font-size:44px}
  .card{padding:20px}
  .feature{gap:20px;margin-bottom:36px}
}


.videowrap{display:flex;justify-content:center}
.videowrap video{width:100%;max-width:340px;border-radius:22px;border:1px solid var(--line);background:#000;box-shadow:0 24px 50px rgba(17,24,39,.22)}