/* ============================================================
   鑫運達貿易香港有限公司 — 實物黃金國際貿易
   配色取自客戶 logo（金 + 黑）与古法金工藝照片
     ivory #F8F5EE · charcoal #15130F · gold #B08D3F / #D3B26A
   ============================================================ */

:root{
  --ivory:#F8F5EE;
  --ivory-2:#F1EBDF;
  --ink:#15130F;
  --char:#15130F;
  --char-2:#0D0B08;
  --gold:#B08D3F;
  --gold-l:#D3B26A;
  --gold-d:#8C6D28;
  --muted:#6E675B;
  --line:rgba(21,19,15,.14);
  --wrap:1180px;

  --serif:'Cormorant Garamond','Songti SC','Source Han Serif SC','Noto Serif CJK SC',STSong,SimSun,Georgia,serif;
  --sans:'Inter','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--ivory);color:var(--ink);
  font-family:var(--sans);line-height:1.72;
  -webkit-font-smoothing:antialiased;
  letter-spacing:.01em;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--char);color:var(--ivory);border:1px solid var(--char);
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:.08em;
  padding:14px 28px;border-radius:2px;text-decoration:none;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{background:var(--gold-d);border-color:var(--gold-d);color:#fff}
.btn-sm{padding:10px 20px;font-size:13px}
.btn-line{background:transparent;color:var(--char);border-color:rgba(21,19,15,.35)}
.btn-line:hover{background:var(--char);color:var(--ivory);border-color:var(--char)}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#1A1406}
.btn-gold:hover{background:var(--gold-l);border-color:var(--gold-l);color:#1A1406}
.btn-block{width:100%;margin-top:6px}

/* ---------- header ---------- */
.head{
  position:sticky;top:0;z-index:40;
  background:rgba(248,245,238,.94);
  backdrop-filter:blur(10px) saturate(140%);
  border-bottom:1px solid rgba(176,141,63,.35);
}
.head-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:74px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-width:0}
.brand-mark{width:44px;flex:0 0 auto}
.brand-txt{display:flex;flex-direction:column;line-height:1.25;min-width:0;overflow:hidden}
.brand-txt b{font-size:15px;font-weight:600;letter-spacing:.08em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-txt i{font-style:normal;font-size:10px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav{display:none;align-items:center;gap:22px}
.nav a{text-decoration:none;font-size:13.5px;letter-spacing:.06em;color:#2C2820;white-space:nowrap}
.nav a:hover{color:var(--gold-d)}
.nav .btn{color:var(--ivory);letter-spacing:.08em}
.lang{
  font-family:var(--sans);font-size:11.5px;letter-spacing:.14em;
  background:transparent;border:1px solid rgba(176,141,63,.6);color:var(--gold-d);
  padding:6px 10px;border-radius:2px;cursor:pointer;
}
.lang:hover{background:var(--gold);border-color:var(--gold);color:#1A1406}
.head-right{display:flex;align-items:center;gap:10px}
.m-lang{display:inline-block}
.burger{display:inline-flex;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer}
.burger span{width:22px;height:1.5px;background:var(--ink);transition:.2s}
body.nav-open .burger span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
body.nav-open .nav{
  display:flex;position:absolute;left:0;right:0;top:74px;flex-direction:column;align-items:flex-start;gap:0;
  background:var(--ivory);border-bottom:1px solid var(--line);padding:6px 22px 20px;
}
body.nav-open .nav a{width:100%;padding:13px 0;border-bottom:1px solid rgba(21,19,15,.07)}
body.nav-open .nav .btn{margin-top:16px;justify-content:center;border-bottom:0}
body.nav-open .nav .lang{margin-top:14px}

/* ---------- hero ---------- */
.hero{padding:44px 0 0}
.hero-in{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
.eyebrow{
  margin:0 0 16px;font-size:11px;font-weight:500;
  letter-spacing:.26em;text-transform:uppercase;color:var(--gold-d);
}
.hero h1{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(30px,6.2vw,58px);line-height:1.16;letter-spacing:.02em;
  margin:0 0 18px;color:var(--char);max-width:16ch;
}
.lede{margin:0 0 26px;font-size:15px;line-height:1.85;color:#3A352B;max-width:52ch}
.stats{display:grid;grid-template-columns:repeat(3,auto);gap:18px 26px;margin:0 0 28px}
.stats > div{min-width:0}
.stats b{
  display:block;font-family:var(--serif);font-size:clamp(26px,5.4vw,38px);
  line-height:1;color:var(--gold-d);letter-spacing:.02em;
}
.stats .unit{font-size:.6em;letter-spacing:0}
.stats > div > span{display:block;margin-top:6px;font-size:11.5px;letter-spacing:.12em;color:var(--muted)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}

.hero-pic{position:relative}
.hero-pic figure{
  margin:0;position:relative;padding:10px;
  border:1px solid rgba(176,141,63,.5);
}
.hero-pic img{width:100%;aspect-ratio:4/3.6;object-fit:cover}
.hero-pic figcaption{
  margin-top:10px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold-d);text-align:right;
}

/* ---------- trust ---------- */
.trust{background:var(--char);color:var(--ivory);margin-top:44px}
.trust-in{display:grid;grid-template-columns:repeat(2,1fr)}
.trust-in > div{padding:20px 14px 20px 0;border-right:1px solid rgba(211,178,106,.22)}
.trust-in > div:nth-child(even){border-right:0;padding-left:16px;padding-right:0}
.trust-in span{display:block;font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:rgba(248,245,238,.5);margin-bottom:6px}
.trust-in b{font-family:var(--serif);font-weight:500;font-size:clamp(14px,3.2vw,19px);letter-spacing:.04em;color:var(--gold-l);word-break:break-word}

/* ---------- sections ---------- */
.sec{padding:64px 0}
.sec-cream{background:var(--ivory-2)}
.sec-dark{background:var(--char);color:var(--ivory)}
.h2{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(25px,5.2vw,42px);line-height:1.24;letter-spacing:.02em;
  margin:0 0 18px;color:var(--char);max-width:26ch;
}
.sec-dark .h2{color:var(--ivory)}
.sec-dark .eyebrow{color:var(--gold-l)}
.sub{margin:0 0 30px;font-size:14.5px;color:var(--muted);max-width:64ch;line-height:1.85}
.sec-dark .sub{color:rgba(248,245,238,.7)}

/* ---------- about ---------- */
.about-in{display:grid;grid-template-columns:1fr;gap:26px}
.about-head .h2{max-width:18ch}
.about-body{display:grid;gap:16px}
.about-body p{
  margin:0;padding-left:18px;border-left:1px solid rgba(176,141,63,.5);
  font-size:14.5px;line-height:1.95;color:#33302A;text-align:justify;
}

/* ---------- port band ---------- */
.band{margin:0;background:var(--char)}
.band figure{margin:0;position:relative}
.band img{width:100%;height:clamp(190px,30vw,340px);object-fit:cover;object-position:center 60%;display:block;opacity:.92}
.band figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:56px 22px 20px;
  background:linear-gradient(transparent,rgba(6,14,9,.88));
  max-width:var(--wrap);margin:0 auto;
}
.band b{
  display:block;font-family:var(--serif);font-weight:500;
  font-size:clamp(17px,3.4vw,26px);letter-spacing:.06em;color:#fff;
}
.band span{
  display:block;margin-top:4px;font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--gold-l);
}

/* ---------- bullion gallery ---------- */
.gallery{display:grid;grid-template-columns:1fr;gap:20px;margin:4px 0 0}
.gallery figure{margin:0}
.gallery img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border:1px solid rgba(176,141,63,.35);
}
.gallery figcaption{padding-top:10px}
.gallery b{
  display:block;font-family:var(--serif);font-weight:500;font-size:17px;
  letter-spacing:.08em;color:var(--char);margin-bottom:2px;
}
.gallery span{font-size:12.5px;line-height:1.6;color:#4A4438}
.note{margin:22px 0 0;font-size:11.5px;line-height:1.7;color:var(--muted);max-width:70ch}

/* ---------- what we do ---------- */
.biz{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid rgba(211,178,106,.25)}
.biz-card{
  padding:22px 4px;border-bottom:1px solid rgba(211,178,106,.25);
}
.biz-card .num{
  font-family:var(--serif);font-size:13px;letter-spacing:.2em;color:var(--gold);display:block;margin-bottom:8px;
}
.biz-card h3{
  font-family:var(--serif);font-weight:500;font-size:21px;letter-spacing:.04em;
  margin:0 0 8px;color:var(--ivory);
}
.biz-card p{margin:0;font-size:13.8px;line-height:1.8;color:rgba(248,245,238,.68)}

/* ---------- craft ---------- */
.craft{display:grid;grid-template-columns:1fr 1fr;gap:22px 14px}
.craft-card{
  background:transparent;
}
.craft-card img{
  width:100%;aspect-ratio:3/3.4;object-fit:cover;
  border:1px solid rgba(176,141,63,.35);
}
.craft-txt{padding:14px 2px 0}
.craft-txt .no{
  font-family:var(--serif);font-size:12px;letter-spacing:.22em;color:var(--gold-d);
}
.craft-txt h3{
  font-family:var(--serif);font-weight:500;font-size:22px;letter-spacing:.14em;
  margin:4px 0 8px;color:var(--char);
}
.craft-txt p{margin:0;font-size:13.5px;line-height:1.8;color:#3F3A31}

/* ---------- docs ---------- */
.docs-in{display:grid;grid-template-columns:1fr;gap:30px}
.doc-card{margin:0}
.doc-shot{
  display:block;width:100%;padding:0;border:1px solid rgba(176,141,63,.4);
  background:#fff;cursor:zoom-in;overflow:hidden;position:relative;
}
.doc-shot img{width:100%;height:auto;max-height:520px;object-fit:cover;object-position:top center;transition:transform .4s ease}
.doc-shot:hover img{transform:scale(1.02)}
.doc-card figcaption{padding:12px 2px 0}
.doc-card h3{font-family:var(--serif);font-weight:500;font-size:19px;letter-spacing:.1em;margin:0}
.doc-hint{margin:2px 0 0;font-size:11.5px;letter-spacing:.1em;color:var(--muted)}
.facts{display:grid;gap:0;margin:0 0 20px;border-top:1px solid var(--line)}
.facts > div{display:grid;grid-template-columns:9.5em 1fr;gap:14px;padding:12px 0;border-bottom:1px solid var(--line)}
.facts dt{font-size:12.5px;letter-spacing:.1em;color:var(--muted)}
.facts dd{margin:0;font-size:13.8px;line-height:1.75;color:#2A2620}
.doc-note{
  margin:0;padding:14px 16px;background:var(--ivory-2);border-left:2px solid var(--gold);
  font-size:13px;color:#4A4438;
}

/* ---------- contact ---------- */
.contact-in{display:grid;grid-template-columns:1fr;gap:34px}
.contact-list{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:16px}
.contact-list span{display:block;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:rgba(248,245,238,.45);margin-bottom:3px}
.contact-list b{font-weight:400;font-size:14px;line-height:1.7;color:rgba(248,245,238,.9)}
.form{background:rgba(255,255,255,.04);border:1px solid rgba(211,178,106,.35);padding:24px 22px}
.form label{display:block;font-size:11.5px;letter-spacing:.12em;color:rgba(248,245,238,.65);margin-bottom:16px}
.form input,.form select,.form textarea{
  width:100%;margin-top:7px;padding:12px 13px;font:inherit;font-size:14.5px;
  color:var(--ivory);background:rgba(0,0,0,.25);
  border:1px solid rgba(211,178,106,.3);border-radius:2px;outline:none;
  transition:border-color .15s ease,background .15s ease;
}
.form select{color:var(--ivory)}
.form select option{color:#111;background:#fff}
.form textarea{resize:vertical;min-height:104px}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--gold-l);background:rgba(0,0,0,.38)}
.row2{display:grid;grid-template-columns:1fr;gap:0}
.form-note{font-size:11.5px;color:rgba(248,245,238,.45);margin:10px 0 0;letter-spacing:.04em}
.form-ok{border:1px solid var(--gold);padding:14px 16px;margin-top:14px;font-size:13px;color:rgba(248,245,238,.9)}
.form-ok b{display:block;margin-bottom:4px;color:var(--gold-l)}
.form-ok p{margin:0;color:rgba(248,245,238,.7)}

/* ---------- footer ---------- */
.foot{background:var(--char-2);color:rgba(248,245,238,.72);padding:42px 0 18px}
.foot-in{display:grid;grid-template-columns:1fr;gap:24px}
.foot-brand{display:flex;align-items:center;gap:12px}
.foot-brand img{width:44px}
.foot-brand b{display:block;font-size:14.5px;letter-spacing:.1em;color:var(--ivory)}
.foot-brand span{display:block;font-size:11px;letter-spacing:.16em;color:rgba(248,245,238,.45);margin-top:2px}
.foot-nav{display:flex;flex-wrap:wrap;gap:12px 22px}
.foot-nav a{text-decoration:none;font-size:13px;letter-spacing:.06em;color:rgba(248,245,238,.7)}
.foot-nav a:hover{color:var(--gold-l)}
.foot-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;
  margin-top:26px;padding-top:14px;border-top:1px solid rgba(211,178,106,.2);
  font-size:11.5px;color:rgba(248,245,238,.4);letter-spacing:.06em;
}

/* ---------- lightbox ---------- */
.lightbox{
  position:fixed;inset:0;z-index:80;background:rgba(8,6,3,.94);
  display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;cursor:zoom-out;
}
.lightbox[hidden]{display:none}
.lightbox img{max-width:100%;max-height:84vh;box-shadow:0 30px 60px rgba(0,0,0,.6)}
.lightbox p{color:rgba(248,245,238,.8);font-size:12.5px;letter-spacing:.06em;margin:12px 0 0;text-align:center;max-width:60ch}
.lb-close{
  position:absolute;top:14px;right:18px;width:40px;height:40px;border-radius:50%;
  background:rgba(255,255,255,.12);color:#fff;border:0;font-size:24px;line-height:1;cursor:pointer;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ============================================================
   ≥ 720px
   ============================================================ */
@media (min-width:720px){
  .hero{padding:64px 0 0}
  .hero-in{grid-template-columns:1.02fr .98fr;gap:52px}
  .hero-pic img{aspect-ratio:4/3.2}
  .gallery{grid-template-columns:1fr 1fr;gap:24px}
  .trust{margin-top:64px}
  .trust-in{grid-template-columns:repeat(4,1fr)}
  .trust-in > div{padding:24px 20px 24px 0}
  .trust-in > div:nth-child(even){padding-left:20px;padding-right:0}
  .trust-in > div:nth-child(3){padding-left:20px}
  .trust-in > div:last-child{border-right:0}
  .about-in{grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
  .about-head{position:sticky;top:100px}
  .biz{grid-template-columns:1fr 1fr;column-gap:34px}
  .craft{grid-template-columns:1fr 1fr;gap:34px 28px}
  .docs-in{grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
  .doc-shot img{max-height:none}
  .contact-in{grid-template-columns:1fr 1fr;gap:52px}
  .row2{grid-template-columns:1fr 1fr;gap:16px}
  .form{padding:30px 28px}
  .foot-in{grid-template-columns:1.4fr 1fr}
  .foot-nav{justify-content:flex-end;align-content:flex-start}
  .sec{padding:88px 0}
}

/* ============================================================
   ≥ 1000px
   ============================================================ */
@media (min-width:1000px){
  .nav{display:flex}
  .burger,.m-lang{display:none}
  .head-in{height:84px}
  .craft{grid-template-columns:repeat(4,1fr);gap:36px 26px}
  .craft-txt p{font-size:13px}
  .biz{grid-template-columns:repeat(3,1fr)}
  .gallery{grid-template-columns:repeat(4,1fr)}
}

/* ============================================================
   桌面端：对称「机构画册」版式
   —— 居中标题、窄栏正文、细金线、无卡片；与 01/02 的排版明确区分
   ============================================================ */
@media (min-width:900px){
  .hero{padding:76px 0 0}
  .hero-in{grid-template-columns:1fr;justify-items:center;gap:0}
  .hero-copy{
    max-width:760px;padding:0;display:flex;flex-direction:column;align-items:center;
    text-align:center;
  }
  .hero h1{max-width:none;font-size:clamp(46px,5.4vw,72px)}
  .lede{max-width:62ch;margin-left:auto;margin-right:auto}
  .stats{justify-content:center;gap:26px 48px}
  .hero-cta{justify-content:center}
  .hero-pic{width:100%;max-width:1060px;margin:52px auto 0}
  .hero-pic figure{padding:0;border:0}
  .hero-pic figcaption{text-align:center;margin-top:12px}

  .eyebrow,.h2,.sub{text-align:center}
  .h2{margin-left:auto;margin-right:auto;max-width:24ch}

  .about-in{grid-template-columns:1fr;gap:24px}
  .about-head{position:static}
  .about-body{max-width:780px;margin:0 auto}
  .about-body p{text-align:justify}

  .biz{grid-template-columns:1fr 1fr;gap:0 48px;max-width:860px;margin:0 auto}
  .biz-card{border:0;border-bottom:1px solid rgba(211,178,106,.3);padding:26px 0;text-align:center}
  .biz-card p{max-width:34ch;margin:0 auto}

  .craft{grid-template-columns:repeat(4,1fr);gap:44px 26px;max-width:1060px;margin:0 auto}
  .craft-txt{text-align:center}
  .craft-txt p{max-width:32ch;margin:0 auto}

  .gallery{grid-template-columns:repeat(4,1fr);gap:30px 22px;max-width:1060px;margin:0 auto}
  .gallery figcaption{text-align:center}
  .note{text-align:center;margin-left:auto;margin-right:auto}

  .docs-in{grid-template-columns:1fr;gap:30px;max-width:820px;margin:0 auto}
  .doc-card{max-width:520px;margin:0 auto}
  .doc-card figcaption{text-align:center}
  .docs-body .facts{max-width:640px;margin:0 auto 20px;text-align:left}

  .contact-in{grid-template-columns:1fr;gap:34px;max-width:820px;margin:0 auto}
  .contact-in .h2,.contact-in .eyebrow,.contact-in .sub{text-align:center}
  .contact-list{max-width:560px;margin:0 auto;text-align:center}
  .form{max-width:720px;margin:0 auto}

  .band figcaption{text-align:center}
  .band b{font-size:clamp(18px,2.4vw,28px)}
}

/* 中文标题按句读分行，英文按词组放宽 */
@media (min-width:900px){
  .hero h1{max-width:7.8em;margin-left:auto;margin-right:auto;font-size:clamp(34px,4.1vw,52px)}
  html[lang="en"] .hero h1{max-width:15em;font-size:clamp(34px,4.4vw,56px)}
  .band figcaption{padding-bottom:26px}
}

/* 内置浏览器提示条的主题色 */
:root{--oib-accent:#B08D3F}