/* 銳擇科技 QuenchEdge 官網樣式 v0.2
   風格參照 claude.ai / anthropic.com：米白底、炭灰字、襯線標題、陶土色單一強調、大留白、圓角細框 */
:root{
  --bg:#f5f4ee;          /* ivory */
  --bg-raise:#fbfaf6;    /* 卡片 */
  --bg-deep:#ecebe3;     /* 交替區塊 */
  --text:#141413;        /* slate */
  --muted:#5e5d59;
  --faint:#8c8a83;
  --line:#e3e1d7;
  --accent:#d97757;      /* clay / terracotta (Anthropic) */
  --accent-soft:#f6e6de;
  --accent-ink:#b35a3c;
  --radius:16px;
  --font-serif:"Source Serif 4","Noto Serif TC","Songti TC","PMingLiU",Georgia,serif;
  --font-sans:"Inter","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);color:var(--text);background:var(--bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:500;line-height:1.25;letter-spacing:.005em}
h1,h2{font-family:var(--font-serif)}
p{margin:0}
.wrap{max-width:1120px;margin:0 auto;padding:0 32px}
.wrap.narrow{max-width:760px}

/* nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(245,244,238,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:baseline;gap:10px}
.mark{width:30px;height:30px;color:var(--text);align-self:center}
.brand-zh{font-family:var(--font-serif);font-size:20px;font-weight:600}
.brand-en{font-size:13px;color:var(--faint);letter-spacing:.06em;text-transform:uppercase}
.menu{display:flex;align-items:center;gap:30px;font-size:15px;color:var(--muted)}
.menu a:hover{color:var(--text)}
.lang{font-size:13px;letter-spacing:.08em;padding:6px 10px;border:1px solid var(--line);border-radius:999px}
.lang:hover{border-color:#c9c7bd}

/* buttons：深色膠囊為主、描邊為次 */
.btn{display:inline-block;background:var(--text);color:#fff;padding:13px 26px;border-radius:999px;font-weight:500;font-size:15px;transition:background .15s,transform .15s;border:1px solid var(--text)}
.btn:hover{background:#2b2a28;color:#fff}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:17px 34px;font-size:18px}
.btn-ghost{background:transparent;color:var(--text);border:1px solid #c9c7bd}
.btn-ghost:hover{background:var(--bg-deep);color:var(--text)}

/* hero */
.hero{padding:128px 0 112px}
.eyebrow{color:var(--accent);font-weight:500;letter-spacing:.14em;text-transform:uppercase;font-size:12px;margin-bottom:28px}
.hero h1{font-size:clamp(46px,7.4vw,88px);margin-bottom:32px;letter-spacing:-.01em;line-height:1.18}
.lead{font-size:19px;color:var(--muted);max-width:640px;margin-bottom:40px;line-height:1.75}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:64px}
.hero-en{font-family:var(--font-serif);font-style:italic;color:var(--faint);font-size:16px}

/* sections */
.section{padding:104px 0}
.section-alt{background:var(--bg-deep)}
.section h2{font-size:46px;margin-bottom:16px}
.section-lead{color:var(--muted);margin-bottom:52px;font-size:17px;max-width:640px}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px 32px;transition:border-color .2s,transform .2s}
.card:hover{border-color:#cfcdc2;transform:translateY(-2px)}
.card h3,.plain h3{font-size:19px;margin:18px 0 10px;font-weight:600}
.card p,.plain p{color:var(--muted);font-size:15px}
.icon{width:40px;height:40px;border-radius:12px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center}
.icon svg{width:20px;height:20px;fill:none;stroke:var(--accent-ink);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.plain h3{margin-top:0}

/* solutions */
.list-2col{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:16px 24px}
.list-2col li{background:var(--bg-raise);border:1px solid var(--line);padding:22px 26px;border-radius:var(--radius);position:relative}
.list-2col li::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:3px;background:var(--accent)}
.list-2col strong{display:block;font-size:17px;margin-bottom:4px;font-weight:600}
.list-2col span{color:var(--muted);font-size:15px}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.steps li{padding-top:18px;border-top:1px solid #c9c7bd}
.num{font-family:var(--font-serif);font-size:15px;color:var(--accent);display:block;margin-bottom:14px}
.steps h3{font-size:19px;margin-bottom:8px;font-weight:600}
.steps p{color:var(--muted);font-size:15px}
.note{margin-top:52px;padding:24px 28px;background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--radius);color:var(--muted);font-size:15px}

/* about & contact */
#about h2{margin-bottom:24px}
#about p{font-size:18px;color:var(--text);line-height:1.9}
.section-contact{text-align:center;padding-bottom:120px}
.section-contact .section-lead{margin:0 auto 36px}
.contact-list{margin:44px auto 0;display:flex;justify-content:center;gap:48px;flex-wrap:wrap;font-size:15px}
.contact-list div{display:flex;gap:12px}
.contact-list dt{color:var(--faint)}
.contact-list dd{margin:0}

/* footer */
.footer{border-top:1px solid var(--line);padding:32px 0;font-size:13px;color:var(--faint)}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* responsive */
@media (max-width:900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .section h2{font-size:36px}
}
@media (max-width:640px){
  .wrap{padding:0 20px}
  .menu a:not(.btn):not(.lang){display:none}
  .hero{padding:80px 0 72px}
  .section{padding:72px 0}
  .grid-3,.steps,.list-2col{grid-template-columns:1fr}
  .brand-en{display:none}
  .contact-list{gap:16px;flex-direction:column;align-items:center}
}