* {
   margin: 0;
   padding: 0;
   box-sizing: border-box;
  }

  body {
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
   line-height: 1.7;
   color: #333;
   background: #fff;
   -webkit-font-smoothing: antialiased;
  }

  img {
   max-width: 100%;
   height: auto;
   display: block;
  }

  
  .bg-primary {
   background-color: #2C3E50;
  }
  .text-primary {
   color: #2C3E50;
  }
  .accent {
   color: #E87722;
  }
  .accent-bg {
   background-color: #E87722;
  }
  .accent-border {
   border-color: #E87722;
  }

  
  .hero {
   position: relative;
   width: 100%;
   max-height: 520px;
   overflow: hidden;
   background-color: #1a2632;
  }

  .hero img {
   width: 100%;
   height: 520px;
   object-fit: cover;
   opacity: 0.55;
  }

  .hero-overlay {
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
   padding: 30px 20px;
   text-align: center;
   background: linear-gradient(135deg, rgba(44, 62, 80, 0.75) 0%, rgba(44, 62, 80, 0.30) 100%);
  }

  .hero h1 {
   font-size: 3rem;
   font-weight: 700;
   color: #fff;
   text-shadow: 0 2px 12px rgba(0, 0, 0, 0.40);
   letter-spacing: 1px;
   max-width: 860px;
   margin-bottom: 18px;
   line-height: 1.2;
  }

  .hero h1 span {
   color: #E87722;
  }

  .hero p {
   font-size: 1.25rem;
   color: rgba(255, 255, 255, 0.92);
   max-width: 700px;
   text-shadow: 0 1px 6px rgba(0, 0, 0, 0.30);
   font-weight: 400;
  }

  
  .container {
   max-width: 1200px;
   margin: 0 auto;
   padding: 0 24px;
  }

  
  .section {
   padding: 70px 0;
  }

  .section-alt {
   background-color: #f7f9fb;
  }

  .section-title {
   font-size: 2rem;
   font-weight: 700;
   color: #2C3E50;
   text-align: center;
   margin-bottom: 50px;
   position: relative;
  }

  .section-title::after {
   content: '';
   display: block;
   width: 64px;
   height: 4px;
   background: #E87722;
   margin: 14px auto 0;
   border-radius: 2px;
  }

  
  .grid-2col {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 48px;
   align-items: center;
  }

  .grid-2col .img-wrap {
   border-radius: 8px;
   overflow: hidden;
   box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
   transition: transform 0.3s ease;
  }

  .grid-2col .img-wrap:hover {
   transform: scale(1.01);
  }

  .grid-2col .img-wrap img {
   width: 100%;
   height: 450px;
   object-fit: cover;
   display: block;
  }

  .grid-2col .text-wrap h2 {
   font-size: 1.7rem;
   font-weight: 700;
   color: #2C3E50;
   margin-bottom: 18px;
  }

  .grid-2col .text-wrap h2 .accent {
   color: #E87722;
  }

  .grid-2col .text-wrap p {
   font-size: 1rem;
   color: #444;
   margin-bottom: 14px;
   line-height: 1.8;
  }

  .grid-2col .text-wrap ul {
   list-style: none;
   padding: 0;
   margin-top: 10px;
  }

  .grid-2col .text-wrap ul li {
   padding: 6px 0 6px 28px;
   background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="%23E87722" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<polyline points="20 6 9 17 4 12"/></svg>') left center no-repeat;
   background-size: 16px;
   color: #444;
   font-size: 0.98rem;
  }

  
  .params-grid {
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
   gap: 28px;
   margin-top: 10px;
  }

  .param-card {
   background: #fff;
   border-radius: 10px;
   padding: 28px 20px 22px;
   text-align: center;
   box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
   border-top: 4px solid #E87722;
   transition: transform 0.25s ease;
  }

  .param-card:hover {
   transform: translateY(-4px);
  }

  .param-card .param-icon {
   font-size: 2rem;
   font-weight: 700;
   color: #E87722;
   margin-bottom: 8px;
  }

  .param-card h3 {
   font-size: 1.05rem;
   font-weight: 600;
   color: #2C3E50;
   margin-bottom: 6px;
  }

  .param-card .param-val {
   font-size: 1.2rem;
   font-weight: 700;
   color: #333;
  }

  .param-card .param-desc {
   font-size: 0.85rem;
   color: #777;
   margin-top: 4px;
  }

  
  .app-grid {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
   gap: 30px;
  }

  .app-item {
   background: #fff;
   border-radius: 10px;
   overflow: hidden;
   box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
   transition: transform 0.25s ease;
  }

  .app-item:hover {
   transform: translateY(-3px);
  }

  .app-item img {
   width: 100%;
   height: 200px;
   object-fit: cover;
  }

  .app-item .app-info {
   padding: 16px 18px 20px;
  }

  .app-item .app-info h3 {
   font-size: 1.1rem;
   font-weight: 600;
   color: #2C3E50;
   margin-bottom: 6px;
  }

  .app-item .app-info p {
   font-size: 0.92rem;
   color: #555;
   line-height: 1.6;
  }

  
  .material-tags {
   display: flex;
   flex-wrap: wrap;
   gap: 12px;
   margin-top: 16px;
  }

  .material-tag {
   background: #fff;
   border: 1.5px solid #e0e4e8;
   border-radius: 30px;
   padding: 8px 22px;
   font-size: 0.92rem;
   color: #2C3E50;
   font-weight: 500;
   transition: all 0.2s ease;
  }

  .material-tag:hover {
   border-color: #E87722;
   color: #E87722;
  }

  
  .case-grid {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
   gap: 24px;
  }

  .case-item {
   border-radius: 10px;
   overflow: hidden;
   box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
   transition: transform 0.25s ease;
   background: #fff;
  }

  .case-item:hover {
   transform: scale(1.02);
  }

  .case-item img {
   width: 100%;
   height: 240px;
   object-fit: cover;
  }

  .case-item .case-label {
   padding: 12px 16px 16px;
   font-size: 0.95rem;
   font-weight: 500;
   color: #2C3E50;
   text-align: center;
  }

  
  .highlight-strip {
   background: #2C3E50;
   padding: 48px 0;
   text-align: center;
  }

  .highlight-strip p {
   font-size: 1.4rem;
   color: #fff;
   max-width: 800px;
   margin: 0 auto;
   font-weight: 300;
   line-height: 1.6;
  }

  .highlight-strip p strong {
   color: #E87722;
   font-weight: 600;
  }

  
  @media (max-width: 992px) {
   .hero h1 {
    font-size: 2.2rem;
   }
   .hero p {
    font-size: 1.05rem;
   }
   .hero img {
    height: 400px;
   }
   .hero {
    max-height: 400px;
   }
   .grid-2col {
    grid-template-columns: 1fr;
    gap: 32px;
   }
   .grid-2col .img-wrap img {
    height: 380px;
   }
   .app-grid {
    grid-template-columns: repeat(2, 1fr);
   }
   .case-grid {
    grid-template-columns: repeat(2, 1fr);
   }
   .section-title {
    font-size: 1.7rem;
   }
  }

  
  @media (max-width: 640px) {
   .hero h1 {
    font-size: 1.6rem;
    letter-spacing: 0;
   }
   .hero p {
    font-size: 0.92rem;
   }
   .hero img {
    height: 320px;
   }
   .hero {
    max-height: 320px;
   }
   .hero-overlay {
    padding: 18px 14px;
   }
   .container {
    padding: 0 16px;
   }
   .section {
    padding: 44px 0;
   }
   .section-title {
    font-size: 1.4rem;
    margin-bottom: 32px;
   }
   .section-title::after {
    width: 44px;
    height: 3px;
    margin-top: 10px;
   }
   .grid-2col {
    gap: 24px;
   }
   .grid-2col .img-wrap img {
    height: 260px;
   }
   .grid-2col .text-wrap h2 {
    font-size: 1.3rem;
   }
   .grid-2col .text-wrap p {
    font-size: 0.92rem;
   }
   .params-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
   }
   .param-card {
    padding: 18px 12px 16px;
   }
   .param-card .param-val {
    font-size: 1rem;
   }
   .app-grid {
    grid-template-columns: 1fr;
    gap: 20px;
   }
   .app-item img {
    height: 180px;
   }
   .case-grid {
    grid-template-columns: 1fr;
    gap: 18px;
   }
   .case-item img {
    height: 200px;
   }
   .highlight-strip p {
    font-size: 1.05rem;
    padding: 0 16px;
   }
   .material-tag {
    padding: 6px 16px;
    font-size: 0.82rem;
   }
  }

  
  @media (max-width: 400px) {
   .params-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
   }
   .hero h1 {
    font-size: 1.3rem;
   }
   .hero img {
    height: 260px;
   }
   .hero {
    max-height: 260px;
   }
   .grid-2col .img-wrap img {
    height: 200px;
   }
  }
 
.kuang-nav { position:sticky; top:0; z-index:1000; background:#fff; border-bottom:2px solid #E87722; box-shadow:0 2px 12px rgba(0,0,0,0.06); }
.kuang-nav-inner { max-width:1200px; margin:0 auto; display:flex; align-items:center; justify-content:space-between; height:60px; padding:0 24px; }
.kuang-nav-brand { display:flex; align-items:center; gap:10px; text-decoration:none; flex-shrink:0; }
.kuang-nav-brand-icon { width:36px; height:36px; background:#E87722; border-radius:8px; display:flex; align-items:center; justify-content:center; color:#fff; font-weight:700; font-size:18px; }
.kuang-nav-brand-text { font-size:17px; font-weight:700; color:#2C3E50; }
.kuang-nav-links { display:flex; align-items:center; gap:2px; list-style:none; }
.kuang-nav-links a { display:block; padding:8px 16px; font-size:15px; font-weight:500; color:#3d4a5a; text-decoration:none; border-radius:6px; transition:color 0.2s,background 0.2s; white-space:nowrap; }
.kuang-nav-links a:hover, .kuang-nav-links a.kuang-active { color:#E87722; background:rgba(232,119,34,0.07); }
.kuang-nav-phone { display:flex; align-items:center; gap:6px; font-size:15px; font-weight:600; color:#E87722; text-decoration:none; flex-shrink:0; transition:opacity 0.2s; }
.kuang-nav-phone:hover { opacity:0.75; }
.kuang-hamburger { display:none; flex-direction:column; justify-content:center; align-items:center; width:40px; height:40px; cursor:pointer; border:none; background:transparent; gap:5px; -webkit-tap-highlight-color:transparent; }
.kuang-hamburger span { display:block; width:22px; height:2px; background:#2C3E50; border-radius:2px; transition:transform 0.3s,opacity 0.3s; }
.kuang-hamburger.kuang-open span:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
.kuang-hamburger.kuang-open span:nth-child(2) { opacity:0; }
.kuang-hamburger.kuang-open span:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }
.kuang-mobile-menu { display:none; position:fixed; top:60px; left:0; right:0; background:#fff; border-bottom:2px solid #E87722; box-shadow:0 8px 24px rgba(0,0,0,0.1); z-index:999; padding:8px 0; transform:translateY(-8px); opacity:0; transition:transform 0.3s ease,opacity 0.3s ease; }
.kuang-mobile-menu.kuang-show { display:block; transform:translateY(0); opacity:1; }
.kuang-mobile-menu a { display:block; padding:12px 24px; font-size:16px; font-weight:500; color:#3d4a5a; text-decoration:none; border-left:3px solid transparent; transition:all 0.2s; }
.kuang-mobile-menu a:hover, .kuang-mobile-menu a.kuang-active { color:#E87722; background:rgba(232,119,34,0.05); border-left-color:#E87722; }
.kuang-mobile-menu .kuang-mob-phone { display:flex; align-items:center; gap:8px; padding:14px 24px; font-size:16px; font-weight:600; color:#E87722; text-decoration:none; border-top:1px solid #eee; margin-top:4px; }


.kuang-footer { background:#1a2332; color:#c0c8d4; }
.kuang-footer-inner { max-width:1200px; margin:0 auto; padding:44px 24px 0; }
.kuang-footer-top { display:flex; gap:48px; flex-wrap:wrap; padding-bottom:32px; border-bottom:1px solid rgba(255,255,255,0.08); }
.kuang-footer-brand { flex:1 1 260px; min-width:220px; }
.kuang-footer-brand-row { display:flex; align-items:center; gap:10px; margin-bottom:12px; }
.kuang-footer-brand-icon { width:36px; height:36px; background:#E87722; border-radius:8px; display:flex; align-items:center; justify-content:center; color:#fff; font-weight:700; font-size:17px; flex-shrink:0; }
.kuang-footer-brand-name { font-size:18px; font-weight:700; color:#e8ecf0; }
.kuang-footer-brand p { font-size:14px; line-height:1.7; color:#7a8a9a; margin-bottom:14px; }
.kuang-footer-contact { display:flex; flex-direction:column; }
.kuang-footer-contact a { display:inline-flex; align-items:center; gap:6px; color:#E87722; text-decoration:none; font-size:14px; font-weight:500; margin-bottom:6px; transition:opacity 0.2s; }
.kuang-footer-contact a:hover { opacity:0.75; }
.kuang-footer-nav { flex:0 1 170px; min-width:140px; }
.kuang-footer-nav h3 { font-size:14px; font-weight:600; color:#e8ecf0; margin-bottom:16px; text-transform:uppercase; letter-spacing:0.5px; }
.kuang-footer-nav ul { list-style:none; }
.kuang-footer-nav ul li { margin-bottom:10px; }
.kuang-footer-nav ul li a { font-size:14px; color:#7a8a9a; text-decoration:none; transition:color 0.2s,transform 0.2s; display:inline-block; }
.kuang-footer-nav ul li a:hover { color:#E87722; transform:translateX(3px); }
.kuang-footer-news { flex:1 1 320px; min-width:260px; }
.kuang-footer-news h3 { font-size:14px; font-weight:600; color:#e8ecf0; margin-bottom:16px; text-transform:uppercase; letter-spacing:0.5px; }
.kuang-news-list { display:flex; flex-direction:column; }
.kuang-news-list a { display:block; padding:9px 14px 9px 24px; font-size:14px; color:#7a8a9a; text-decoration:none; border-radius:5px; position:relative; line-height:1.5; transition:color 0.2s,background 0.2s; }
.kuang-news-list a::before { content:""; position:absolute; left:10px; top:50%; transform:translateY(-50%); width:5px; height:5px; background:#3a4a5e; border-radius:50%; transition:background 0.2s; }
.kuang-news-list a:hover { color:#E87722; background:rgba(232,119,34,0.06); }
.kuang-news-list a:hover::before { background:#E87722; }
.kuang-news-list a + a { border-top:1px solid rgba(255,255,255,0.04); }
.kuang-footer-bottom { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:10px; padding:18px 0 22px; }
.kuang-footer-bottom p { font-size:13px; color:#4e5a6a; margin:0; }
.kuang-footer-bottom-links { display:flex; gap:18px; }
.kuang-footer-bottom-links a { font-size:13px; color:#4e5a6a; text-decoration:none; transition:color 0.2s; }
.kuang-footer-bottom-links a:hover { color:#E87722; }


.kuang-back-top { position:fixed; bottom:28px; right:28px; width:44px; height:44px; background:#E87722; color:#fff; border:none; border-radius:10px; cursor:pointer; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 16px rgba(232,119,34,0.35); opacity:0; transform:translateY(12px); transition:all 0.3s ease; z-index:800; -webkit-tap-highlight-color:transparent; }
.kuang-back-top.kuang-visible { opacity:1; transform:translateY(0); }
.kuang-back-top:hover { background:#d06a1a; transform:translateY(-2px); }


@media (max-width:1024px) { .kuang-footer-top { gap:32px; } }
@media (max-width:768px) {
 .kuang-nav-links { display:none; }
 .kuang-nav-phone { display:none; }
 .kuang-hamburger { display:flex; }
 .kuang-footer-inner { padding:32px 20px 0; }
 .kuang-footer-top { flex-direction:column; gap:28px; }
 .kuang-footer-brand, .kuang-footer-nav, .kuang-footer-news { flex:1 1 100%; min-width:0; }
 .kuang-footer-bottom { flex-direction:column; text-align:center; }
}
@media (max-width:480px) {
 .kuang-nav-inner { padding:0 14px; height:54px; }
 .kuang-nav-brand-text { font-size:15px; }
 .kuang-nav-brand-icon { width:30px; height:30px; font-size:15px; border-radius:6px; }
 .kuang-mobile-menu { top:54px; }
 .kuang-footer-inner { padding:26px 14px 0; }
 .kuang-news-list a { font-size:13px; padding:8px 10px 8px 20px; }
 .kuang-news-list a::before { left:6px; width:4px; height:4px; }
 .kuang-back-top { width:38px; height:38px; bottom:16px; right:14px; border-radius:8px; }
}