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

body {
 font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
 color: #2C3E50;
 line-height: 1.6;
 background: #fafafa;
}

.hero {
 background: #2C3E50;
 padding: 80px 20px 70px;
 text-align: center;
 position: relative;
}

.hero::after {
 content: '';
 display: block;
 width: 80px;
 height: 4px;
 background: #E87722;
 margin: 28px auto 0;
 border-radius: 2px;
}

.hero h1 {
 font-size: 38px;
 font-weight: 700;
 color: #fff;
 letter-spacing: 1px;
 max-width: 900px;
 margin: 0 auto;
}

.hero p {
 font-size: 18px;
 color: rgba(255, 255, 255, 0.85);
 margin-top: 18px;
 max-width: 640px;
 margin-left: auto;
 margin-right: auto;
 font-weight: 400;
}

.container {
 max-width: 1200px;
 margin: 0 auto;
 padding: 0 20px;
}

.section {
 padding: 60px 0;
 border-bottom: 1px solid #e8edf2;
}

.section:last-child {
 border-bottom: none;
}

.section-title {
 font-size: 28px;
 font-weight: 600;
 color: #2C3E50;
 margin-bottom: 16px;
 position: relative;
 padding-bottom: 12px;
}

.section-title::after {
 content: '';
 display: block;
 width: 50px;
 height: 3px;
 background: #E87722;
 position: absolute;
 bottom: 0;
 left: 0;
 border-radius: 2px;
}

.section-sub {
 font-size: 16px;
 color: #5a6e7e;
 margin-bottom: 32px;
 max-width: 780px;
}

.flex-row {
 display: flex;
 gap: 40px;
 align-items: center;
}

.flex-row .col-text {
 flex: 1;
 min-width: 0;
}

.flex-row .col-img {
 flex: 0 0 auto;
 min-width: 0;
}

.flex-row .col-img img {
 width: 600px;
 height: 450px;
 object-fit: cover;
 border-radius: 6px;
 box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
 display: block;
}

.flex-row.reverse {
 flex-direction: row-reverse;
}

.text-block p {
 font-size: 16px;
 color: #2C3E50;
 margin-bottom: 14px;
 line-height: 1.8;
}

.text-block p:last-child {
 margin-bottom: 0;
}

.device-highlight {
 background: #fff;
 border-radius: 8px;
 padding: 16px 20px;
 border-left: 4px solid #E87722;
 margin-top: 16px;
 box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.device-highlight p {
 margin-bottom: 4px;
 font-weight: 500;
 color: #2C3E50;
}

.grid-3 {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 24px;
 margin-top: 20px;
}

.grid-3 .grid-item {
 background: #fff;
 border-radius: 6px;
 overflow: hidden;
 box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
 transition: transform 0.2s;
}

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

.grid-3 .grid-item img {
 width: 100%;
 height: 200px;
 object-fit: cover;
 display: block;
}

.grid-3 .grid-item .grid-text {
 padding: 16px 18px 20px;
}

.grid-3 .grid-item .grid-text h4 {
 font-size: 16px;
 font-weight: 600;
 color: #2C3E50;
 margin-bottom: 8px;
}

.grid-3 .grid-item .grid-text p {
 font-size: 14px;
 color: #5a6e7e;
 line-height: 1.7;
}

@media (max-width: 1024px) {
 .hero h1 {
  font-size: 30px;
 }

 .flex-row {
  gap: 30px;
 }

 .flex-row .col-img img {
  width: 480px;
  height: 360px;
 }

 .grid-3 {
  gap: 18px;
 }

 .grid-3 .grid-item img {
  height: 170px;
 }
}

@media (max-width: 768px) {
 .hero {
  padding: 50px 16px 45px;
 }

 .hero h1 {
  font-size: 24px;
 }

 .hero p {
  font-size: 15px;
 }

 .section {
  padding: 40px 0;
 }

 .section-title {
  font-size: 22px;
 }

 .flex-row {
  flex-direction: column !important;
  gap: 20px;
 }

 .flex-row .col-img {
  width: 100%;
 }

 .flex-row .col-img img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
 }

 .grid-3 {
  grid-template-columns: 1fr;
  gap: 16px;
 }

 .grid-3 .grid-item img {
  height: 200px;
 }

 .device-highlight {
  padding: 12px 16px;
 }
}

@media (max-width: 480px) {
 .hero h1 {
  font-size: 20px;
 }

 .hero p {
  font-size: 14px;
 }

 .section-title {
  font-size: 19px;
 }

 .text-block p {
  font-size: 15px;
 }

 .grid-3 .grid-item img {
  height: 170px;
 }
}

.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; }
}