/* ============================================
   臣璽律師事務所 — 全站共用樣式
   設計：墨黑 × 米白紙感 × 黛綠 × 暖金
   ============================================ */
:root{
  --ink:#16170f;
  --ink-soft:#2a2b20;
  --paper:#f4f1e9;
  --paper-deep:#e9e4d6;
  --paper-card:#fbf9f3;
  --jade:#3d5343;
  --jade-light:#5a7060;
  --gold:#9a7b3f;
  --gold-light:#c2a366;
  --line:rgba(22,23,15,.14);
  --line-soft:rgba(22,23,15,.08);
  --muted:#5c5a4f;
  --muted-light:#807d70;
  --shadow:0 18px 50px -24px rgba(22,23,15,.4);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
  background:var(--paper);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  line-height:1.75;
}
.serif{font-family:"Noto Serif TC","Songti TC",serif}
a{color:inherit}
img{display:block;max-width:100%}

/* layout */
.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(20px,5vw,56px)}
section{position:relative}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:20px clamp(20px,5vw,56px);
  transition:background .35s, padding .35s, box-shadow .35s;
}
.site-header.solid{
  background:rgba(244,241,233,.92);
  backdrop-filter:blur(10px);
  box-shadow:0 1px 0 var(--line-soft);
  padding:14px clamp(20px,5vw,56px);
}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--paper);transition:color .35s}
.site-header.solid .brand{color:var(--ink)}

.site-header.solid .brand .mark{font-family:"Noto Serif TC",serif;font-size:24px;font-weight:600;letter-spacing:.08em}
.brand .en{font-size:10.5px;letter-spacing:.34em;opacity:.7;text-transform:uppercase}
/* SVG brand mark + text */
.brand-texts{display:flex;flex-direction:column;gap:3px}
.brand-cn{font-family:"Noto Serif TC","PingFang TC",serif;font-size:15px;font-weight:600;letter-spacing:.07em;line-height:1}
.brand-en{font-size:9px;letter-spacing:.26em;opacity:.75;text-transform:uppercase;font-family:Georgia,serif;line-height:1}
.nav{display:flex;gap:32px;align-items:center}
.nav a{text-decoration:none;font-size:14.5px;letter-spacing:.04em;color:var(--paper);opacity:.85;transition:opacity .25s,color .35s}
.site-header.solid .nav a{color:var(--ink)}
.nav a:hover{opacity:1}
.nav a.active{opacity:1;font-weight:500}
.nav-cta{border:1px solid currentColor;padding:8px 18px;border-radius:1px;opacity:1!important;transition:background .25s,color .25s}
.nav-cta:hover{background:var(--gold);border-color:var(--gold);color:var(--paper)!important}
.menu-btn{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:inherit}

/* mobile nav */
.mobile-nav{
  position:fixed;inset:0;z-index:99;background:var(--ink);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  opacity:0;pointer-events:none;transition:opacity .35s;
}
.mobile-nav.open{opacity:1;pointer-events:auto}
.mobile-nav a{color:var(--paper);text-decoration:none;font-size:22px;font-family:"Noto Serif TC",serif;padding:14px;letter-spacing:.08em}
.mobile-nav .close{position:absolute;top:24px;right:28px;font-size:30px;color:var(--paper);background:none;border:none;cursor:pointer}

/* ---------- page hero (inner pages) ---------- */
.page-hero{
  padding:170px 0 70px;background:var(--ink);color:var(--paper);position:relative;overflow:hidden;
}
.page-hero .eyebrow{color:var(--gold-light)}
.page-hero h1{font-family:"Noto Serif TC",serif;font-size:clamp(33px,5vw,52px);font-weight:600;letter-spacing:.03em;margin-top:18px;line-height:1.25}
.page-hero p{color:rgba(244,241,233,.8);margin-top:18px;max-width:560px;font-weight:300}
.page-hero .deco{position:absolute;right:-60px;bottom:-60px;width:340px;height:340px;border:1px solid rgba(154,123,63,.25);border-radius:50%}
.page-hero .deco::after{content:"";position:absolute;inset:40px;border:1px solid rgba(154,123,63,.18);border-radius:50%}

/* shared bits */
.eyebrow{display:flex;align-items:center;gap:13px;font-size:13px;letter-spacing:.28em;color:var(--gold)}
.eyebrow .rule{width:42px;height:1px;background:currentColor;flex-shrink:0}
.section-title{font-family:"Noto Serif TC",serif;font-size:clamp(27px,3.6vw,40px);font-weight:600;letter-spacing:.02em;line-height:1.3;margin-top:16px}
.lead{color:var(--muted);font-size:16.5px;font-weight:300;max-width:620px;margin-top:18px}

.btn-primary{
  display:inline-block;background:var(--ink);color:var(--paper);
  padding:14px 30px;text-decoration:none;font-size:15px;letter-spacing:.05em;
  border-radius:1px;font-weight:500;transition:background .25s,transform .25s;border:none;cursor:pointer;
}
.btn-primary:hover{background:var(--gold);transform:translateY(-2px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;
  font-size:15px;letter-spacing:.04em;border-bottom:1px solid var(--gold);padding-bottom:3px;transition:gap .25s;
}
.btn-ghost:hover{gap:14px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--paper);padding:64px 0 30px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(244,241,233,.12)}
.footer-brand .mark{font-family:"Noto Serif TC",serif;font-size:26px;font-weight:600;letter-spacing:.08em}
.footer-brand p{color:rgba(244,241,233,.6);font-size:14px;margin-top:16px;font-weight:300;max-width:300px}
.footer-col h4{font-size:13px;letter-spacing:.2em;color:var(--gold-light);margin-bottom:18px;font-weight:500}
.footer-col a,.footer-col p{display:block;color:rgba(244,241,233,.75);text-decoration:none;font-size:14.5px;margin-bottom:11px;font-weight:300;transition:color .2s}
.footer-col a:hover{color:var(--paper)}
.footer-bottom{padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:rgba(244,241,233,.45)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* responsive */
@media(max-width:860px){
  .nav{display:none}
  .menu-btn{display:block}
  .footer-grid{grid-template-columns:1fr;gap:30px}
}