:root{
  --mb-primary:#f5b70a;
  --mb-primary-dark:#d99e05;
  --ink:#1f2937;
  --mut:#5b6678;
  --line:#e6e8ec;
  --bg:#ffffff;
  --bg-alt:#f7f8fa;
  --radius:14px;
  --shadow:0 4px 18px rgba(31,41,55,.07);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
.container{max-width:1080px;margin:0 auto;padding:0 24px;}

/* logo */
.mb-logo{display:inline-flex;align-items:center;gap:2px;font-weight:800;font-size:24px;letter-spacing:-.5px;color:var(--ink);}
.mb-logo .mb-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:var(--mb-primary);
  color:#fff;font-weight:900;font-size:20px;margin-right:2px;
}
.mb-word{color:var(--ink);}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
.nav-inner{max-width:1080px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:18px;}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14.5px;font-weight:500;}
.nav-links a{color:var(--mut);transition:color .15s;}
.nav-links a:hover{color:var(--ink);}
.lang-switch{display:flex;gap:4px;margin-left:18px;}
.lang-switch button{
  border:1px solid var(--line);background:#fff;color:var(--mut);
  font-size:12.5px;padding:5px 9px;border-radius:8px;cursor:pointer;transition:all .15s;font-weight:600;
}
.lang-switch button:hover{border-color:var(--mb-primary);color:var(--ink);}
.lang-switch button.active{background:var(--mb-primary);border-color:var(--mb-primary);color:#fff;}

/* hero */
.hero{background:linear-gradient(160deg,#fffdf5 0%,#fff 100%);padding:84px 0 72px;border-bottom:1px solid var(--line);}
.hero-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--mb-primary-dark);background:#fff7e0;padding:5px 12px;border-radius:20px;margin:0 0 18px;}
.hero h1{font-size:40px;line-height:1.25;font-weight:800;margin:0 0 18px;letter-spacing:-.5px;max-width:760px;}
.hero-sub{font-size:17px;color:var(--mut);margin:0 0 32px;max-width:620px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:13px 26px;border-radius:11px;font-weight:700;font-size:15px;cursor:pointer;transition:all .15s;}
.btn-primary{background:var(--mb-primary);color:#1f2937;box-shadow:var(--shadow);}
.btn-primary:hover{background:var(--mb-primary-dark);transform:translateY(-1px);}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}

/* sections */
.section{padding:72px 0;}
.section-alt{background:var(--bg-alt);}
.section h2{font-size:30px;font-weight:800;margin:0 0 10px;letter-spacing:-.5px;}
.section-sub{font-size:15.5px;color:var(--mut);margin:0 0 36px;max-width:680px;}

/* services grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 26px rgba(31,41,55,.1);}
.card-no{font-size:13px;font-weight:800;color:var(--mb-primary-dark);margin-bottom:8px;}
.card h3{font-size:18px;margin:0 0 10px;font-weight:700;}
.card p{font-size:14.5px;color:var(--mut);margin:0;}

/* process steps */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:22px;counter-reset:step;}
.steps li{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);}
.step-no{flex:0 0 38px;width:38px;height:38px;border-radius:50%;background:var(--mb-primary);color:#1f2937;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:17px;}
.steps h3{font-size:16.5px;margin:0 0 6px;font-weight:700;}
.steps p{font-size:14px;color:var(--mut);margin:0;}

/* cases */
.case-box{background:#fff;border:1px dashed var(--mb-primary);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);}
.case-box h3{margin:0 0 12px;font-size:18px;color:var(--mb-primary-dark);}
.case-box p{margin:0;font-size:15px;color:var(--mut);line-height:1.9;}

/* about */
.about-body{max-width:760px;}
.about-body p{font-size:15.5px;color:var(--ink);margin:0 0 16px;}
.about-body strong{color:var(--mb-primary-dark);}

/* contact */
.contact-grid{display:flex;gap:40px;flex-wrap:wrap;margin-bottom:24px;}
.contact-item{display:flex;flex-direction:column;gap:6px;}
.contact-label{font-size:13px;color:var(--mut);font-weight:600;text-transform:uppercase;letter-spacing:.5px;}
.contact-value{font-size:18px;font-weight:700;display:flex;align-items:center;gap:10px;}
.contact-link{color:var(--mb-primary);text-decoration:none;font-size:15px;font-weight:600;border-bottom:1px dashed var(--mb-primary);padding-bottom:1px;}
.contact-link:hover{opacity:.78;}
.copy-btn{border:1px solid var(--line);background:#fff;color:var(--mut);font-size:12.5px;padding:4px 10px;border-radius:7px;cursor:pointer;font-weight:600;transition:all .15s;}
.copy-btn:hover{border-color:var(--mb-primary);color:var(--ink);}
.contact-note{font-size:13.5px;color:var(--mut);background:#fff7e0;border-left:3px solid var(--mb-primary);padding:14px 16px;border-radius:8px;max-width:760px;}

/* footer */
.footer{border-top:1px solid var(--line);padding:28px 0;background:var(--bg-alt);}
.footer p{font-size:13px;color:var(--mut);margin:0;text-align:center;}

/* responsive */
@media (max-width:860px){
  .grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;}
  .hero h1{font-size:31px;}
  .nav-links{display:none;}
}
@media (max-width:560px){
  .grid{grid-template-columns:1fr;}
  .hero{padding:56px 0 48px;}
  .section{padding:52px 0;}
  .hero h1{font-size:27px;}
  .lang-switch button{padding:4px 7px;font-size:11.5px;}
}

/* 案例照片墙 */
.case-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.case-photo {
  margin: 0;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,.06);
  transition: transform .2s;
}
.case-photo:hover {
  transform: translateY(-3px);
}
.case-photo img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}
.case-photo figcaption {
  padding: .75rem 1rem;
  font-size: .9rem;
  color: #374151;
  text-align: center;
}