:root{
  --black:#050505;
  --gold:#d4af37;
  --gold-mid:#c9a227;
  --gold-light:#f5e6a8;
  --dark:#0f0f0f;
  --dark-elev:#141414;
  --gray:#9a9a9a;
  --gray-dim:#5c5c5c;
  --white:#fafafa;
  --border:rgba(212,175,55,.12);
  --border-strong:rgba(212,175,55,.28);
  --shadow:0 24px 48px rgba(0,0,0,.45);
  --radius:12px;
  --radius-sm:8px;
  --ease:cubic-bezier(.4,0,.2,1);
  --header-h:64px;
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
.skip-link{
  position:absolute;
  left:-9999px;
  z-index:3000;
  padding:12px 20px;
  background:var(--gold);
  color:#0a0a0a;
  font-weight:700;
  border-radius:var(--radius-sm);
}
.skip-link:focus{
  left:12px;
  top:12px;
  outline:2px solid var(--white);
  outline-offset:2px;
}
body{
  background:var(--black);
  color:var(--white);
  line-height:1.65;
  font-family:"Microsoft YaHei","PingFang SC",system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.container{width:min(92%,1200px);margin-inline:auto;padding-inline:clamp(12px,3vw,20px)}
a{color:var(--gold);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--gold-light)}
a:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 32px;
  background:linear-gradient(135deg,var(--gold) 0%,#a67c00 100%);
  color:#0a0a0a;
  font-weight:700;
  font-size:15px;
  letter-spacing:.02em;
  border-radius:var(--radius-sm);
  border:none;
  cursor:pointer;
  box-shadow:0 4px 20px rgba(212,175,55,.25);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),opacity .2s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(212,175,55,.35)}
.btn:active{transform:translateY(0)}
button.btn{font:inherit;text-align:center}

/* Header（毛玻璃放在 ::before，避免子元素 position:fixed 被错误算在 64px 高的 header 里） */
header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:var(--header-h);
  z-index:1000;
  background:rgba(5,5,5,.88);
  border-bottom:1px solid var(--border);
}
header::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:rgba(5,5,5,.55);
  backdrop-filter:saturate(140%) blur(12px);
  -webkit-backdrop-filter:saturate(140%) blur(12px);
}
header > .container{
  position:relative;
  z-index:1;
  height:100%;
}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:100%}
.logo{
  font-size:clamp(18px,2.5vw,22px);
  font-weight:800;
  letter-spacing:.04em;
  color:var(--gold);
  text-decoration:none;
}
.logo:hover,.logo:focus-visible{color:var(--gold)}
.logo span{color:var(--gray);font-weight:500;letter-spacing:0}
nav{display:flex;align-items:center;gap:16px}
nav ul{display:flex;list-style:none;gap:clamp(16px,2.5vw,32px);align-items:center}
nav a{color:rgba(250,250,250,.88);font-size:14px;position:relative;padding-block:4px}
nav a::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-mid));
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
nav a:hover{color:var(--white)}
nav a:hover::after{transform:scaleX(1)}
.hamburger{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:36px;
  height:36px;
  padding:0;
  background:transparent;
  border:none;
  cursor:pointer;
  border-radius:8px;
  transition:opacity .2s var(--ease);
}
.hamburger__bar{
  display:block;
  width:18px;
  height:2px;
  background:var(--white);
  border-radius:1px;
}
.hamburger:hover{opacity:.85}
.hamburger:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

/* Hero */
.hero{
  min-height:100vh;
  min-height:100dvh;
  display:flex;
  align-items:center;
  padding-top:var(--header-h);
  position:relative;
  overflow:hidden;
  isolation:isolate;
}
.hero::before{
  content:"";
  position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%,rgba(212,175,55,.15),transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 50%,rgba(80,60,20,.12),transparent 50%),
    radial-gradient(ellipse 50% 35% at 0% 80%,rgba(40,35,25,.2),transparent 45%),
    linear-gradient(180deg,#0c0c0c 0%,var(--black) 45%,#030303 100%);
}
.hero::after{
  content:"";
  position:absolute;inset:0;z-index:-1;opacity:.35;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse 70% 70% at 50% 40%,#000 20%,transparent 70%);
}
.hero-content{
  max-width:640px;
  padding-top:calc(60px + 20px + clamp(6px,1.6vh,16px));
  padding-bottom:calc(60px + clamp(6px,1.6vh,16px));
}
.hero-kicker{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:16px;
  padding:6px 12px;
  border:1px solid var(--border-strong);
  border-radius:999px;
  background:rgba(212,175,55,.06);
}
.hero h1{
  font-size:clamp(32px,5vw,52px);
  line-height:1.28;
  margin-bottom:20px;
  font-weight:800;
  letter-spacing:-.02em;
}
.hero h1 .line-gold{
  display:inline-block;
  margin-bottom:.42em;
  background:linear-gradient(135deg,var(--gold-light) 0%,var(--gold) 45%,#8b6914 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero p{font-size:clamp(15px,1.8vw,18px);color:var(--gray);margin-bottom:32px;max-width:52ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-cta .btn-secondary{
  padding:12px 24px;
  background:transparent;
  color:var(--white);
  border:1px solid var(--border-strong);
  box-shadow:none;
  font-weight:600;
}
.hero-cta .btn-secondary:hover{
  border-color:var(--gold);
  color:var(--gold-light);
  transform:translateY(-2px);
}

/* Section */
.section{padding:clamp(64px,12vw,100px) 0}
.section-alt{background:linear-gradient(180deg,rgba(255,255,255,.02) 0%,transparent 100%)}
.section-head{text-align:center;max-width:560px;margin-inline:auto;margin-bottom:clamp(40px,6vw,56px)}
.section-eyebrow{font-size:11px;font-weight:700;letter-spacing:.22em;color:var(--gold-mid);text-transform:uppercase;margin-bottom:10px}
.section-title{font-size:clamp(26px,4vw,36px);color:var(--white);font-weight:800;letter-spacing:-.02em}
.section-title span{color:var(--gold)}
.section-desc{margin-top:12px;font-size:15px;color:var(--gray)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:clamp(20px,3vw,28px)}
.card{
  background:var(--dark-elev);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:clamp(24px,4vw,32px);
  text-align:left;
  transition:border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.card:hover{
  border-color:var(--border-strong);
  transform:translateY(-4px);
  box-shadow:var(--shadow),0 0 0 1px rgba(212,175,55,.06) inset;
}
.card h3{margin:16px 0 10px;color:var(--white);font-size:18px;font-weight:700}
.card p{color:var(--gray);font-size:14px;line-height:1.7}
.case-tag{display:inline-block;font-size:11px;font-weight:600;color:var(--gold);letter-spacing:.08em;margin-bottom:8px}

/* About */
.about-wrap{display:flex;flex-wrap:wrap;gap:clamp(32px,5vw,48px);align-items:center}
.about-text{flex:1 1 min(100%,420px)}
.about-text h3{font-size:clamp(22px,3vw,28px);margin-bottom:16px;color:var(--gold);font-weight:800}
.about-text p{color:var(--gray);margin-bottom:14px;font-size:15px}
.about-panel{
  flex:1 1 min(100%,320px);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px;
  background:linear-gradient(145deg,rgba(212,175,55,.08) 0%,var(--dark-elev) 50%);
}
.about-panel dt{font-size:12px;color:var(--gray-dim);margin-bottom:4px}
.about-panel dd{font-size:15px;font-weight:600;color:var(--white);margin-bottom:18px}
.about-panel dd:last-of-type{margin-bottom:0}

/* Service */
.service-icon{
  width:48px;height:48px;display:flex;align-items:center;justify-content:center;
  font-size:22px;border-radius:12px;
  background:rgba(212,175,55,.1);border:1px solid var(--border);
}

/* Contact */
.contact-wrap{
  max-width:520px;margin-inline:auto;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:clamp(28px,5vw,40px);
  background:linear-gradient(180deg,rgba(20,20,20,.9) 0%,var(--dark) 100%);
  margin-bottom:28px;
}
.contact-row{
  display:flex;gap:14px;align-items:flex-start;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.contact-row:last-of-type{border-bottom:none;padding-bottom:0}
.contact-row:first-of-type{padding-top:0}
.contact-icon{flex-shrink:0;width:36px;height:36px;border-radius:10px;background:rgba(212,175,55,.1);display:flex;align-items:center;justify-content:center;font-size:16px}
.contact-row p{color:var(--gray);font-size:15px;line-height:1.5}
.contact-row strong{color:var(--white);font-weight:600;display:block;margin-bottom:2px}
.contact-actions{text-align:center}

/* Footer */
footer{background:var(--dark);padding:36px 0 40px;text-align:center;border-top:1px solid var(--border)}
footer p{color:var(--gray-dim);font-size:13px;line-height:1.7;max-width:720px;margin-inline:auto}
footer p + p{margin-top:10px;font-size:12px;opacity:.85}

/* 微信二维码弹窗 */
.qr-modal{
  position:fixed;
  inset:0;
  z-index:2000;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:max(16px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(16px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left));
  visibility:hidden;
  opacity:0;
  pointer-events:none;
  transition:opacity .28s var(--ease),visibility .28s;
}
.qr-modal.is-open{
  visibility:visible;
  opacity:1;
  pointer-events:auto;
}
.qr-modal__backdrop{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,.72);
  cursor:pointer;
}
.qr-modal__dialog{
  position:relative;
  z-index:1;
  width:min(92vw,340px);
  padding:28px 24px 24px;
  background:var(--dark-elev);
  border:1px solid var(--border-strong);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  text-align:center;
}
.qr-modal__x{
  position:absolute;
  top:10px;
  right:10px;
  width:40px;
  height:40px;
  border:none;
  border-radius:10px;
  background:transparent;
  color:var(--gray);
  font-size:26px;
  line-height:1;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:color .2s,background .2s;
}
.qr-modal__x:hover{color:var(--white);background:rgba(255,255,255,.08)}
.qr-modal__title{
  font-size:18px;
  font-weight:800;
  color:var(--gold);
  margin-bottom:16px;
}
.qr-modal__img{
  display:block;
  width:min(72vw,260px);
  height:auto;
  margin:0 auto;
  border-radius:8px;
  border:1px solid var(--border);
}
.qr-modal__hint{
  margin-top:14px;
  font-size:14px;
  color:var(--gray);
}

/* Mobile */
@media(max-width:768px){
  nav{position:relative;z-index:2}
  nav ul{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    bottom:0;
    width:100%;
    max-width:100%;
    flex-direction:column;
    justify-content:flex-start;
    gap:8px;
    margin:0;
    background:rgba(5,5,5,.97);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    padding:24px clamp(16px,4vw,24px) max(32px,env(safe-area-inset-bottom,0px));
    transform:translate3d(-100%,0,0);
    transition:transform .3s var(--ease);
    border-top:1px solid var(--border);
    z-index:1001;
    overflow-y:auto;
    -webkit-overflow-scrolling:touch;
  }
  nav ul.active{transform:translate3d(0,0,0)}
  nav a{font-size:16px;padding:12px 16px;border-radius:var(--radius-sm)}
  nav a::after{display:none}
  .hamburger{
    display:flex;
    margin-inline-end:-6px;
  }
  .hero{
    min-height:0;
    align-items:flex-start;
    padding-bottom:max(20px,env(safe-area-inset-bottom,0px));
  }
  .hero-content{
    width:100%;
  }
}