/* ===============================================================
   MUKTUNG — Modern Brand Stylesheet
   Apple-inspired minimal design, mobile-first
   =============================================================== */

/* ---------- Reset & Base ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"SF Pro SC","SF Pro Display","SF Pro Text",-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  background:#fff;color:#1d1d1f;line-height:1.47059;letter-spacing:-.022em;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden
}
a{color:#06c;text-decoration:none;transition:color .2s}
a:hover{color:#004499}
img{display:block;max-width:100%;height:auto}
::selection{background:#06c;color:#fff}

/* ---------- Nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:9999;
  background:rgba(0,0,0,.92);backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  height:48px
}
.nav-inner{
  max-width:1100px;margin:0 auto;display:flex;align-items:center;
  justify-content:space-between;padding:0 24px;height:48px
}
.nav-logo{color:#f5f5f7;font-size:15px;font-weight:500;letter-spacing:1px;opacity:.85;text-decoration:none}
.nav-logo:hover{color:#fff;opacity:1}
.nav-logo .reg{font-size:9px;vertical-align:super;line-height:1}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{
  color:rgba(245,245,247,.56);font-size:13px;font-weight:400;
  letter-spacing:-.01em;transition:opacity .2s,color .2s;text-decoration:none
}
.nav-links a:hover,.nav-links a.active{color:#fff;opacity:.88}
.nav-cn{font-size:10px;opacity:.5;font-weight:400;margin-left:2px}

/* Hamburger */
.nav-toggle{display:none;flex-direction:column;justify-content:center;cursor:pointer;padding:8px;background:none;border:none}
.nav-toggle span{display:block;width:18px;height:1.5px;background:#f5f5f7;margin:3px 0;transition:all .3s ease;border-radius:1px;transform-origin:center}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  background:#000;color:#f5f5f7;text-align:center;
  padding:150px 24px 90px;position:relative;overflow:hidden
}
.hero::after{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:radial-gradient(ellipse at 50% 0%, rgba(41,151,255,.08) 0%, transparent 60%);
  pointer-events:none
}
.hero h1{
  font-size:56px;font-weight:700;letter-spacing:-.005em;line-height:1.07143;
  background:linear-gradient(180deg,#fff,rgba(255,255,255,.7));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  position:relative;z-index:1
}
.hero p{font-size:24px;font-weight:400;letter-spacing:.009em;color:#86868b;margin-top:8px;position:relative;z-index:1}
.hero .cta{
  display:inline-block;font-size:17px;color:#2997ff;margin-top:24px;
  font-weight:400;position:relative;z-index:1;transition:color .2s
}
.hero .cta:hover{color:#40a9ff;text-decoration:underline}
.hero .cta::after{content:" ›";font-size:19px}

/* ---------- Page Hero ---------- */
.page-hero{
  background:#f5f5f7;text-align:center;padding:110px 24px 60px
}
.page-hero h1{font-size:48px;font-weight:700;letter-spacing:-.003em;margin-bottom:6px}
.page-hero p{font-size:22px;color:#86868b;font-weight:400}

/* ---------- Sections ---------- */
.section{padding:80px 24px}
.section.dark{background:#000;color:#f5f5f7}
.section.gray{background:#f5f5f7}
.section-title{
  text-align:center;font-size:48px;font-weight:700;letter-spacing:-.003em;
  margin-bottom:8px;line-height:1.08349
}
.section-sub{
  text-align:center;font-size:24px;color:#86868b;font-weight:400;margin-bottom:50px
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  max-width:1100px;margin:0 auto;padding:20px 24px 0;
  font-size:13px;color:#86868b
}
.breadcrumb a{color:#86868b}
.breadcrumb a:hover{color:#06c}
.breadcrumb .sep{margin:0 8px;color:#d2d2d7}
.breadcrumb .current{color:#1d1d1f;font-weight:500}

/* ---------- Category Grid ---------- */
.cat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;
  max-width:1000px;margin:0 auto
}
.cat-card{
  background:#f5f5f7;border-radius:14px;padding:40px 16px;text-align:center;
  text-decoration:none;color:#1d1d1f;transition:all .25s cubic-bezier(.4,0,.2,1);
  position:relative;overflow:hidden
}
.cat-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:#06c;transform:scaleX(0);transition:transform .25s ease;transform-origin:left
}
.cat-card:hover{background:#e8e8ed;transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.cat-card:hover::before{transform:scaleX(1)}
.cat-card .icon{font-size:36px;margin-bottom:10px}
.cat-card .name{font-size:17px;font-weight:600;margin-bottom:2px}
.cat-card .cn-name{font-size:12px;color:#86868b;margin-bottom:4px}
.cat-card .count{font-size:12px;color:#86868b}

/* ---------- Product Grid ---------- */
.prod-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:12px;max-width:1100px;margin:0 auto
}
.prod-card{
  border-radius:14px;overflow:hidden;text-decoration:none;color:#1d1d1f;
  background:#f5f5f7;transition:all .25s cubic-bezier(.4,0,.2,1)
}
.prod-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(0,0,0,.08)}
.prod-img{
  height:240px;display:flex;align-items:center;justify-content:center;
  padding:30px;background:#f5f5f7
}
.prod-img img{max-width:80%;max-height:100%;object-fit:contain;transition:transform .3s ease}
.prod-card:hover .prod-img img{transform:scale(1.05)}
.prod-info{padding:0 18px 20px}
.prod-tag{font-size:11px;color:#06c;font-weight:500;letter-spacing:.02em;margin-bottom:2px}
.prod-info h3{font-size:16px;font-weight:600;letter-spacing:-.01em}

/* ---------- Filter ---------- */
.filter{text-align:center;padding:12px 0 30px;max-width:1100px;margin:0 auto}
.filter a{
  display:inline-block;padding:6px 18px;margin:4px;border-radius:100px;
  font-size:13px;color:#1d1d1f;background:#e8e8ed;border:1px solid transparent;
  transition:all .2s ease;text-decoration:none
}
.filter a:hover,.filter a.active{background:transparent;border-color:#1d1d1f}

/* ---------- Product Detail ---------- */
.detail-wrap{max-width:1000px;margin:40px auto 60px;padding:0 24px}
.back-link{text-align:center;margin-bottom:20px}
.back-link a{
  display:inline-flex;align-items:center;gap:6px;padding:8px 20px;
  background:#f5f5f7;color:#1d1d1f;text-decoration:none;border-radius:8px;
  font-size:14px;transition:background .2s
}
.back-link a:hover{background:#e8e8ed}
.detail-img{
  background:#f5f5f7;border-radius:16px;padding:60px 40px;
  text-align:center;margin-bottom:30px;position:relative;overflow:hidden
}
.detail-img img{max-width:100%;max-height:450px;object-fit:contain;margin:0 auto}
.detail-info{max-width:700px;margin:0 auto;text-align:center}
.detail-info .tag{color:#06c;font-size:12px;font-weight:500;letter-spacing:.02em;display:block;margin-bottom:6px}
.detail-info h2{font-size:32px;font-weight:600;margin-bottom:16px;letter-spacing:-.01em}
.detail-info .desc{font-size:16px;color:#515154;line-height:1.64286;text-align:left}
.detail-info .desc p{margin-bottom:.8em}
.detail-info .desc img{max-width:100%;border-radius:8px;margin:12px auto}

/* ---------- Support ---------- */
.support-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:14px;max-width:1100px;margin:0 auto 60px
}
.article-item{
  display:flex;flex-direction:column;background:#f5f5f7;border-radius:14px;
  padding:28px;text-decoration:none;color:#1d1d1f;
  transition:all .25s cubic-bezier(.4,0,.2,1)
}
.article-item:hover{background:#e8e8ed;transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.article-item .article-badge{
  display:inline-block;font-size:12px;padding:3px 10px;border-radius:100px;
  margin-bottom:10px;align-self:flex-start
}
.article-item .article-badge.video{background:#000;color:#fff}
.article-item .article-badge.article{background:#e8e8ed;color:#1d1d1f}
.article-item h3{font-size:17px;font-weight:600;margin:0 0 8px;line-height:1.4}
.article-item p{font-size:13px;color:#86868b;line-height:1.5;flex:1}
.article-item time{font-size:12px;color:#86868b;margin-top:12px}

/* Support Detail */
.detail-body{max-width:800px;margin:0 auto 60px;padding:40px 24px 0}
.detail-body h1{font-size:28px;font-weight:700;text-align:center;margin-bottom:12px;letter-spacing:-.01em}
.detail-body .content{font-size:16px;color:#515154;line-height:1.7;margin-top:24px}
.detail-body .content p{margin-bottom:.8em}
.detail-body .content img{max-width:100%;border-radius:8px;margin:16px auto}
.detail-body .back-cta{text-align:center;margin-top:40px}
.detail-body .back-cta a{color:#2997ff;font-size:16px}
.detail-body .back-cta a:hover{text-decoration:underline}
.video-wrap{max-width:800px;margin:30px auto;text-align:center}
.video-wrap video{width:100%;max-width:720px;border-radius:14px;box-shadow:0 6px 24px rgba(0,0,0,.1)}
.support-detail-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

/* ---------- About / Contact Content ---------- */
.content-block{max-width:700px;margin:50px auto;padding:0 24px}
.content-block p{font-size:17px;color:#515154;line-height:1.7}
.about-wrap{max-width:700px;margin:0 auto 60px;font-size:17px;line-height:1.8;color:#1d1d1f}
.about-wrap p{margin-bottom:1em}
.contact-wrap{max-width:500px;margin:0 auto 60px;background:#f5f5f7;border-radius:16px;padding:36px;text-align:center}
.contact-wrap .contact-item{margin-bottom:20px}
.contact-wrap .contact-item:last-child{margin-bottom:0}
.contact-wrap .contact-label{font-size:12px;color:#86868b;text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}
.contact-wrap .contact-value{font-size:16px;color:#1d1d1f;font-weight:500}

/* ---------- Pagination ---------- */
.pagination{text-align:center;padding:30px 0 50px}
.page-btn{
  display:inline-block;padding:8px 14px;margin:0 3px;border-radius:8px;
  text-decoration:none;font-size:14px;background:#f5f5f7;color:#1d1d1f;
  transition:all .2s
}
.page-btn:hover{background:#e8e8ed}
.page-btn.active-page{
  background:#1d1d1f;color:#fff;pointer-events:none
}
.pagination-info{text-align:center;color:#86868b;font-size:13px;margin-bottom:4px}

/* ---------- Search ---------- */
.search-form{max-width:500px;margin:0 auto 30px;display:flex;gap:8px}
.search-form input{
  flex:1;padding:10px 16px;border:1px solid #d2d2d7;border-radius:8px;
  font-size:14px;outline:none;transition:border-color .2s,box-shadow .2s;
  font-family:inherit
}
.search-form input:focus{border-color:#06c;box-shadow:0 0 0 3px rgba(0,102,204,.12)}
.search-form button{
  padding:10px 20px;background:#1d1d1f;color:#fff;border:none;
  border-radius:8px;cursor:pointer;font-size:14px;transition:background .2s;
  font-family:inherit;white-space:nowrap
}
.search-form button:hover{background:#000}
.search-info{text-align:center;color:#86868b;font-size:14px;margin-bottom:24px}

/* ---------- 404 ---------- */
.not-found{text-align:center;padding:120px 24px}
.not-found h1{font-size:72px;font-weight:700;color:#d2d2d7;margin-bottom:8px}
.not-found p{font-size:18px;color:#86868b;margin-bottom:24px}
.not-found a{font-size:16px;color:#2997ff}

/* ---------- Footer ---------- */
.footer{
  background:#f5f5f7;padding:30px 24px;text-align:center;
  border-top:1px solid #d2d2d7
}
.footer-inner{max-width:1100px;margin:0 auto}
.footer-links{display:flex;justify-content:center;gap:20px;margin-bottom:12px;flex-wrap:wrap}
.footer-links a{color:#86868b;font-size:12px;transition:color .2s}
.footer-links a:hover{color:#1d1d1f}
.footer-copy{font-size:11px;color:#86868b}
.footer-copy a{color:#86868b}
.footer-copy a:hover{color:#1d1d1f}

/* ---------- Responsive: Tablet ---------- */
@media(max-width:834px){
  .hero h1{font-size:40px}
  .hero p{font-size:19px}
  .section-title{font-size:36px}
  .section-sub{font-size:19px}
  .page-hero h1{font-size:36px}
  .page-hero p{font-size:18px}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
}

/* ---------- Responsive: Mobile ---------- */
@media(max-width:640px){
  .nav{height:44px}
  .nav-inner{padding:0 16px;height:44px}
  .nav-links{
    position:fixed;top:44px;left:0;right:0;background:rgba(0,0,0,.95);
    flex-direction:column;gap:0;padding:12px 0;display:none;
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-top:1px solid rgba(255,255,255,.08)
  }
  .nav-links.open{display:flex}
  .nav-links a{
    padding:12px 24px;font-size:15px;opacity:.7;
    border-bottom:1px solid rgba(255,255,255,.04)
  }
  .nav-links a:last-child{border-bottom:none}
  .nav-toggle{display:flex}
  .hero{padding:120px 16px 60px}
  .hero h1{font-size:32px}
  .hero p{font-size:18px}
  .page-hero{padding:90px 16px 40px}
  .page-hero h1{font-size:28px}
  .page-hero p{font-size:17px}
  .section{padding:50px 16px}
  .section-title{font-size:28px}
  .section-sub{font-size:17px;margin-bottom:30px}
  .cat-grid{gap:8px}
  .cat-card{padding:28px 12px}
  .cat-card .icon{font-size:28px;margin-bottom:6px}
  .cat-card .name{font-size:14px}
  .cat-card .cn-name{font-size:11px}
  .prod-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .prod-img{height:180px;padding:20px}
  .prod-info h3{font-size:14px}
  .detail-img{padding:30px 20px}
  .detail-info h2{font-size:22px}
  .support-grid{grid-template-columns:1fr}
  .breadcrumb{font-size:12px;padding:16px 16px 0}
  .search-form{flex-direction:column}
  .search-form button{width:100%}
  .filter a{font-size:12px;padding:5px 14px}
  .footer{padding:24px 16px}
  .footer-links{gap:14px}
}

@media(max-width:400px){
  .prod-grid{grid-template-columns:1fr;gap:10px}
  .cat-grid{grid-template-columns:repeat(2,1fr);gap:6px}
  .cat-card{padding:20px 8px}
  .hero h1{font-size:26px}
  .detail-info h2{font-size:18px}
}

/* ---------- Animations ---------- */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:translateY(0)}
}
.hero>*,.page-hero>*{animation:fadeUp .6s ease both}
.hero>*{animation-delay:.1s}
.hero p{animation-delay:.2s}
.hero .cta{animation-delay:.3s}
.cat-grid,.prod-grid,.support-grid{animation:fadeUp .5s ease both}
.section-title,.section-sub{animation:fadeUp .4s ease both}

/* ---------- Utility ---------- */
.text-center{text-align:center}
.text-muted{color:#86868b}
.mt-4{margin-top:16px}
.mb-4{margin-bottom:16px}
.py-4{padding-top:16px;padding-bottom:16px}
.empty-state{text-align:center;padding:60px 24px;color:#86868b}
.empty-state .icon{font-size:48px;margin-bottom:12px;display:block}
.empty-state p{font-size:16px}