:root{
    /* 深灰底而非純黑，米白字而非純白，降低暈光/眩光 */
    --bg:#1B1C1B;
    --bg-2:#232422;
    --ink:#EDEAE0;
    --ink-soft:#C9C6BA;
    --muted:#9B988D;
    --line:#3A3B37;
    --line-strong:#4C4D48;
    --accent:#D8B26B;        /* 溫暖的琥珀色，深色背景下對比夠、不刺眼 */
    --accent-soft:#2A2823;
    --body:'Noto Sans TC', sans-serif;
    --mono:'JetBrains Mono', monospace;
    --serif:'Noto Serif TC', serif;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth; font-size:17px;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:var(--body);
    font-weight:400;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%; display:block;}
  a{color:inherit; text-decoration:none;}
  .wrap{max-width:1160px; margin:0 auto; padding:0 40px;}
  @media(max-width:640px){ .wrap{padding:0 22px;} }

  .eyebrow{
    font-family:var(--mono);
    font-size:12.5px;
    letter-spacing:0.16em;
    text-transform:uppercase;
    color:var(--accent);
    margin-bottom:20px;
    font-weight:500;
  }

  /* ---------- nav ---------- */
  header{
    border-bottom:1px solid var(--line);
    background:rgba(27,28,27,0.92);
    backdrop-filter:blur(6px);
    position:sticky; top:0; z-index:50;
  }
  nav.wrap{
    display:flex; align-items:center; justify-content:space-between;
    padding-top:22px; padding-bottom:22px;
  }
  .logo{
    font-weight:600; font-size:16.5px; letter-spacing:0.02em; color:var(--ink);
    display:flex; flex-direction:column; line-height:1.3;
  }
  .logo small{
    font-family:var(--mono); font-size:10px; letter-spacing:0.14em;
    color:var(--muted); font-weight:400; margin-top:3px;
  }
  .navlinks{display:flex; gap:38px; font-size:14.5px; color:var(--ink-soft); font-weight:500;}
  .navlinks a{
    position:relative; padding-bottom:6px; padding-left:0;
    transition:color .35s ease, padding-left .35s cubic-bezier(.2,.7,.2,1);
  }
  .navlinks a::before{
    content:""; position:absolute; left:-14px; top:50%; transform:translateY(-50%);
    width:4px; height:4px; border-radius:50%; background:var(--accent);
    opacity:0; transition:opacity .3s ease, left .3s ease;
  }
  .navlinks a:hover{color:var(--accent); padding-left:14px;}
  .navlinks a:hover::before{opacity:1; left:0;}
  .navlinks a::after{
    content:""; position:absolute; left:0; bottom:0; width:0; height:1px;
    background:var(--accent); transition:width .35s cubic-bezier(.2,.7,.2,1);
  }
  .navlinks a:hover::after{width:100%;}
  .btn{
    font-size:14px; letter-spacing:0.02em;
    padding:12px 24px; font-weight:600;
    border:1px solid var(--ink); cursor:pointer; white-space:nowrap;
    transition:background .25s ease, color .25s ease, border-color .25s ease, box-shadow .25s ease, transform .15s ease;
  }
  .btn-solid{
    background:linear-gradient(180deg,#E4C583,var(--accent));
    color:#1B1C1B; border-color:var(--accent);
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.35), 0 1px 0 rgba(0,0,0,0.2);
  }
  .btn-solid:hover{
    background:linear-gradient(180deg,#EDD49B,#E6C583);
    border-color:#E6C583; transform:translateY(-1px);
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.45), 0 4px 12px rgba(216,178,107,0.25);
  }
  .btn-ghost{
    background:transparent; color:var(--ink);
    box-shadow:inset 0 0 0 1px rgba(237,234,224,0.06);
  }
  .btn-ghost:hover{background:var(--ink); color:var(--bg); transform:translateY(-1px);}
  @media(max-width:860px){ .navlinks{display:none;} }

  /* ---------- hero ---------- */
  .hero{padding:110px 0 0;}
  .hero-grid{display:grid; grid-template-columns:1.15fr 0.85fr; gap:40px; align-items:center;}
  .hero-top{max-width:760px;}
  .hero-visual{display:flex; align-items:center; justify-content:center;}
  @media(max-width:900px){ .hero-grid{grid-template-columns:1fr;} }
  /* ---------- hero browser mockup card ---------- */
  .browser-card{
    width:100%; max-width:440px;
    background:var(--bg-2);
    border:1px solid var(--line-strong);
    box-shadow:0 30px 60px -30px rgba(0,0,0,0.55), 0 10px 24px -12px rgba(0,0,0,0.4);
    transform:perspective(1400px) rotateY(-7deg) rotateX(2deg);
    transform-style:preserve-3d;
  }
  .browser-bar{
    display:flex; align-items:center; gap:10px;
    padding:11px 14px; border-bottom:1px solid var(--line);
    background:var(--bg-2);
  }
  .browser-dots{display:flex; gap:6px;}
  .browser-dots span{width:8px; height:8px; border-radius:50%; display:block;}
  .browser-dots span:nth-child(1){background:#8a6a63;}
  .browser-dots span:nth-child(2){background:#8f8564;}
  .browser-dots span:nth-child(3){background:#5f7d6a;}
  .browser-url{
    flex:1; background:var(--bg); border:1px solid var(--line);
    padding:5px 12px; font-family:var(--mono); font-size:10.5px; color:var(--muted);
    letter-spacing:0.01em;
  }
  .db-body{display:grid; grid-template-columns:100px 1fr; min-height:280px;}
  .db-side{border-right:1px solid var(--line); padding:18px 14px; display:flex; flex-direction:column; gap:16px;}
  .db-logo{font-family:var(--mono); font-size:10px; color:var(--muted); letter-spacing:0.08em; margin-bottom:6px;}
  .db-nav-item{
    font-family:var(--mono); font-size:10px; color:var(--muted); letter-spacing:0.04em;
    padding-left:10px; border-left:2px solid transparent; line-height:2;
  }
  .db-nav-item.active{color:var(--accent); border-left-color:var(--accent);}
  .db-main{padding:18px 18px 20px;}
  .db-cards{display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-bottom:18px;}
  .db-card{border:1px solid var(--line); padding:11px 12px;}
  .db-card .n{font-family:var(--mono); font-size:16px; color:var(--accent); font-weight:600;}
  .db-card .l{font-family:var(--mono); font-size:8.5px; color:var(--muted); margin-top:4px; letter-spacing:0.03em;}
  .db-chart{display:flex; align-items:flex-end; gap:6px; height:46px; margin-bottom:18px; padding:0 2px;}
  .db-chart span{flex:1; background:var(--line-strong); opacity:.7;}
  .db-chart span.hi{background:var(--accent); opacity:.55;}
  .db-table{border-top:1px solid var(--line);}
  .db-row{
    display:grid; grid-template-columns:44px 1fr auto; gap:10px; align-items:center;
    padding:9px 0; border-bottom:1px solid var(--line);
    font-family:var(--mono); font-size:9.5px;
  }
  .db-row .rid{color:var(--muted);}
  .db-row .rname{color:var(--ink-soft); font-family:var(--body); font-size:11.5px;}
  .db-row .rstatus{color:var(--accent); display:flex; align-items:center; gap:5px; white-space:nowrap;}
  .db-row .rstatus::before{content:""; width:4px; height:4px; border-radius:50%; background:var(--accent);}
  @media(max-width:900px){ .hero-visual{display:none;} }
  .hero h1{
    font-weight:600; font-size:clamp(32px,4.4vw,52px);
    line-height:1.45; letter-spacing:-0.005em; color:var(--ink);
    margin-bottom:28px;
  }
  .hero h1 b{color:var(--accent); font-family:var(--serif); font-weight:600; font-style:italic;}
  .hero p.lede{font-size:17px; color:var(--ink-soft); max-width:46ch; margin-bottom:42px; font-weight:400;}
  .hero-actions{display:flex; gap:14px; margin-bottom:80px; flex-wrap:wrap;}

  .hero-strip{
    border-top:1px solid var(--line);
    display:grid; grid-template-columns:repeat(4,1fr);
  }
  .hero-strip div{
    padding:26px 0; border-right:1px solid var(--line);
    padding-right:20px;
  }
  .hero-strip div:last-child{border-right:none;}
  .hero-strip .num{font-family:var(--mono); font-size:23px; font-weight:600; color:var(--accent);}
  .hero-strip .lbl{font-size:13px; color:var(--muted); margin-top:6px;}
  @media(max-width:760px){
    .hero-strip{grid-template-columns:repeat(2,1fr);}
    .hero-strip div{border-bottom:1px solid var(--line);}
  }

  /* ---------- section shell ---------- */
  section{padding:96px 0;}
  .section-head{
    display:flex; justify-content:space-between; align-items:flex-end;
    margin-bottom:52px; gap:24px; padding-bottom:28px; border-bottom:1px solid var(--line);
  }
  .section-head h2{font-size:clamp(22px,2.6vw,29px); font-weight:600; max-width:22ch; letter-spacing:-0.005em; color:var(--ink);}
  .section-head p{color:var(--muted); font-size:14.5px; max-width:36ch;}
  @media(max-width:700px){ .section-head{flex-direction:column; align-items:flex-start;} }

  /* ---------- solutions ---------- */
  .sol-grid{display:grid; grid-template-columns:repeat(4,1fr); }
  .sol-card{padding:0 28px 0 0; border-right:1px solid var(--line);}
  .sol-card:last-child{border-right:none;}
  .sol-card .idx{font-family:var(--mono); font-size:12px; color:var(--accent); letter-spacing:0.05em; margin-bottom:20px; font-weight:500;}
  .sol-card h3{font-size:17px; font-weight:600; margin-bottom:12px; color:var(--ink);}
  .sol-card p{font-size:14px; color:var(--ink-soft); line-height:1.8;}
  @media(max-width:900px){
    .sol-grid{grid-template-columns:repeat(2,1fr); row-gap:44px;}
    .sol-card{border-right:none; padding-right:0;}
  }

  /* ---------- case files ---------- */
  .case-list{display:flex; flex-direction:column;}
  .case-row{
    display:grid; grid-template-columns:100px 1.2fr 1.6fr auto; align-items:center; gap:20px;
    padding:26px 0; border-bottom:1px solid var(--line);
    transition:background .2s;
  }
  .case-row:hover{background:var(--bg-2);}
  .case-row .cid{font-family:var(--mono); font-size:12px; color:var(--muted);}
  .case-org{display:flex; align-items:center; gap:16px;}
  .case-org img{width:34px; height:34px; object-fit:contain; opacity:.9; filter:brightness(1.4);}
  .case-org b{font-size:16px; font-weight:600; display:block; color:var(--ink);}
  .case-org span{font-size:12.5px; color:var(--muted);}
  .case-tags{display:flex; flex-wrap:wrap; gap:18px;}
  .case-tags span{font-size:13px; color:var(--ink-soft);}
  .case-tags span:not(:last-child)::after{content:"·"; margin-left:18px; color:var(--line-strong);}
  .status{
    font-family:var(--mono); font-size:12px; color:var(--accent);
    display:flex; align-items:center; gap:7px; justify-self:end; white-space:nowrap; font-weight:500;
  }
  .status::before{content:""; width:5px; height:5px; border-radius:50%; background:var(--accent);}
  @media(max-width:820px){
    .case-row{grid-template-columns:1fr; gap:10px; padding:22px 0;}
    .status{justify-self:start;}
    .case-tags span:not(:last-child)::after{margin-left:12px;}
  }

  /* ---------- products ---------- */
  .products-band{background:var(--bg-2);}
  .prod-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
  .prod-card{background:var(--bg-2); padding:32px; display:flex; flex-direction:column; gap:16px;}
  .prod-top{display:flex; align-items:center; gap:14px;}
  .prod-icon{width:48px; height:48px; border-radius:10px; overflow:hidden; flex-shrink:0; border:1px solid var(--line);}
  .prod-icon img{width:100%; height:100%; object-fit:cover;}
  .prod-top h3{font-size:16px; font-weight:600; color:var(--ink);}
  .prod-top span{font-family:var(--mono); font-size:11px; color:var(--muted); letter-spacing:0.03em;}
  .prod-card p{font-size:14px; color:var(--ink-soft); flex:1; line-height:1.8;}
  .prod-tags{display:flex; flex-wrap:wrap; gap:16px;}
  .prod-tags span{font-size:12.5px; color:var(--ink-soft);}
  .prod-tags span:not(:last-child)::after{content:"·"; margin-left:16px; color:var(--line-strong);}
  .prod-link{
    font-family:var(--mono); font-size:12.5px; color:var(--accent); font-weight:500;
    display:flex; align-items:center; gap:6px; margin-top:6px; padding-top:16px; border-top:1px solid var(--line);
  }
  .prod-link::after{content:"→"; transition:transform .2s;}
  .prod-card:hover .prod-link::after{transform:translateX(3px);}
  @media(max-width:900px){ .prod-grid{grid-template-columns:1fr;} }

  /* ---------- contact cta ---------- */
  .cta-band{padding:120px 0; text-align:center;}
  .cta-band .eyebrow{display:flex; justify-content:center;}
  .cta-band h2{font-size:clamp(26px,3.4vw,38px); font-weight:600; max-width:18ch; margin:0 auto 22px; color:var(--ink);}
  .cta-band h2 b{color:var(--accent); font-family:var(--serif); font-weight:600; font-style:italic;}
  .cta-band p{color:var(--muted); margin-bottom:38px; font-size:15px;}
  .cta-actions{display:flex; gap:12px; justify-content:center; flex-wrap:wrap;}

  /* ---------- contact form ---------- */
  #contact .section-head{margin-bottom:56px;}
  .contact-layout{
    display:grid; grid-template-columns:0.85fr 1.15fr; gap:64px; align-items:start;
  }
  @media(max-width:900px){ .contact-layout{grid-template-columns:1fr; gap:48px;} }

  /* 左側資訊 */
  .info-list{display:flex; flex-direction:column;}
  .info-item{
    display:flex; align-items:flex-start; gap:16px;
    padding:22px 0; border-bottom:1px solid var(--line);
  }
  .info-item:first-child{padding-top:0;}
  .info-icon{
    width:42px; height:42px; flex-shrink:0;
    display:flex; align-items:center; justify-content:center;
    border:1px solid var(--line); background:var(--bg-2); color:var(--accent);
    transition:border-color .25s ease, background .25s ease;
  }
  .info-icon svg{width:18px; height:18px; stroke:currentColor; fill:none; stroke-width:1.6; stroke-linecap:round; stroke-linejoin:round;}
  .info-item:hover .info-icon{border-color:var(--accent); background:var(--accent-soft);}
  .info-label{
    font-family:var(--mono); font-size:11px; letter-spacing:0.06em;
    text-transform:uppercase; color:var(--muted); margin-bottom:6px;
  }
  .info-value{font-size:15px; color:var(--ink); font-weight:500; line-height:1.6;}
  .info-value a{transition:color .25s ease;}
  .info-value a:hover{color:var(--accent);}

  .feature-cards{display:flex; flex-direction:column; gap:16px; margin-top:36px;}
  .feature-card{display:flex; align-items:center; gap:12px;}
  .feature-dot{width:5px; height:5px; border-radius:50%; background:var(--accent); flex-shrink:0;}
  .feature-text{font-size:13.5px; color:var(--ink-soft);}

  /* 右側表單 */
  .contact-form-wrap{
    background:var(--bg-2); border:1px solid var(--line-strong); padding:44px;
  }
  .form-title{font-size:19px; font-weight:600; color:var(--ink); margin-bottom:8px;}
  .form-desc{font-size:13.5px; color:var(--muted); margin-bottom:32px;}
  .form-row{display:grid; grid-template-columns:1fr 1fr; gap:18px;}
  .form-group{display:flex; flex-direction:column; gap:8px; margin-bottom:20px;}
  .form-group label{font-size:13px; color:var(--ink-soft); font-weight:500;}
  .form-group label .req{color:var(--accent);}
  .form-group input,
  .form-group select,
  .form-group textarea{
    background:var(--bg); border:1px solid var(--line); color:var(--ink);
    padding:12px 14px; font-family:var(--body); font-size:14px; width:100%;
    transition:border-color .25s ease;
  }
  .form-group input::placeholder,
  .form-group textarea::placeholder{color:var(--muted);}
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus{outline:none; border-color:var(--accent);}
  .form-group textarea{min-height:120px; resize:vertical; line-height:1.7; font-family:var(--body);}
  .form-group select{
    appearance:none; -webkit-appearance:none; cursor:pointer;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%239B988D'/%3E%3C/svg%3E");
    background-repeat:no-repeat; background-position:right 14px center;
  }
  @media(max-width:560px){ .form-row{grid-template-columns:1fr;} }

  .consent-row{display:flex; align-items:flex-start; gap:10px; margin-bottom:28px;}
  .consent-row input[type="checkbox"]{margin-top:3px; accent-color:var(--accent); width:15px; height:15px; flex-shrink:0;}
  .consent-text{font-size:12.5px; color:var(--muted); line-height:1.7;}

  .submit-btn{
    width:100%; border:1px solid var(--accent); cursor:pointer;
    background:linear-gradient(180deg,#E4C583,var(--accent));
    color:#1B1C1B; font-weight:600; font-size:15px; padding:15px 24px;
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.35), 0 1px 0 rgba(0,0,0,0.2);
    transition:background .25s ease, transform .15s ease, box-shadow .25s ease;
  }
  .submit-btn:hover{
    background:linear-gradient(180deg,#EDD49B,#E6C583); transform:translateY(-1px);
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.45), 0 4px 12px rgba(216,178,107,0.25);
  }

  .success-msg{display:none; text-align:center; padding:40px 10px;}
  .success-icon{
    width:52px; height:52px; border:1px solid var(--accent); border-radius:50%;
    display:flex; align-items:center; justify-content:center; margin:0 auto 22px;
    color:var(--accent); font-size:22px;
  }
  .success-msg h3{font-size:19px; font-weight:600; color:var(--ink); margin-bottom:12px;}
  .success-msg p{font-size:14px; color:var(--muted); line-height:1.8;}
  #submit_qcontent_info{color:var(--accent); font-family:var(--mono); font-size:12px; margin-top:14px;}

  footer{border-top:1px solid var(--line); padding:48px 0; font-size:13.5px; color:var(--muted);}
  .foot-grid{display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px;}
  .foot-grid .logo{margin-bottom:8px; color:var(--ink);}

  ::selection{background:var(--accent); color:#1B1C1B;}