* {
 margin: 0;
 padding: 0;
 box-sizing: border-box;
}
body {
 font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
 color: #2C3E50;
 line-height: 1.7;
 background: #fff;
}
.container {
 max-width: 1200px;
 margin: 0 auto;
 padding: 0 24px;
}
.section {
 padding: 70px 0;
}
.section-light {
 background: #fff;
}
.section-gray {
 background: #f7f8fa;
}
h1 {
 font-size: 42px;
 font-weight: 700;
 color: #fff;
 line-height: 1.25;
 letter-spacing: 1px;
}
h1 span {
 color: #E87722;
}
h2 {
 font-size: 30px;
 font-weight: 700;
 color: #2C3E50;
 margin-bottom: 20px;
 position: relative;
 padding-bottom: 14px;
}
h2:after {
 content: "";
 position: absolute;
 bottom: 0;
 left: 0;
 width: 56px;
 height: 4px;
 background: #E87722;
 border-radius: 2px;
}
.text-center h2:after {
 left: 50%;
 transform: translateX(-50%);
}
h3 {
 font-size: 20px;
 font-weight: 600;
 color: #2C3E50;
 margin-bottom: 10px;
}
p {
 font-size: 16px;
 color: #444;
 margin-bottom: 16px;
}
p.lead {
 font-size: 18px;
 color: #2C3E50;
 font-weight: 500;
}
.flex-row {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: 40px;
}
.flex-row .col-text {
 flex: 1 1 48%;
 min-width: 300px;
}
.flex-row .col-img {
 flex: 1 1 48%;
 min-width: 300px;
}
.flex-row-reverse {
 flex-direction: row-reverse;
}
.img-wrap {
 width: 100%;
 max-width: 600px;
 margin: 0 auto;
 border-radius: 10px;
 overflow: hidden;
 box-shadow: 0 6px 24px rgba(44, 62, 80, 0.12);
 transition: transform 0.3s ease;
}
.img-wrap:hover {
 transform: translateY(-4px);
}
.img-wrap img {
 width: 600px;
 height: 450px;
 object-fit: cover;
 display: block;
}
.hero {
 background: #2C3E50;
 padding: 80px 0 60px;
 position: relative;
}
.hero .flex-row {
 align-items: center;
}
.hero h1 {
 margin-bottom: 18px;
}
.hero p {
 color: rgba(255, 255, 255, 0.85);
 font-size: 18px;
 max-width: 560px;
}
.hero .img-wrap {
 box-shadow: 0 10px 36px rgba(0, 0, 0, 0.25);
}
.tag {
 display: inline-block;
 background: #E87722;
 color: #fff;
 font-size: 14px;
 font-weight: 600;
 padding: 4px 16px;
 border-radius: 20px;
 margin-bottom: 16px;
}
.card-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
 gap: 32px;
 margin-top: 30px;
}
.card {
 background: #fff;
 border-radius: 12px;
 overflow: hidden;
 box-shadow: 0 4px 16px rgba(44, 62, 80, 0.08);
 transition: box-shadow 0.3s ease;
}
.card:hover {
 box-shadow: 0 8px 32px rgba(44, 62, 80, 0.15);
}
.card .img-wrap {
 border-radius: 0;
 box-shadow: none;
 max-width: 100%;
}
.card .card-body {
 padding: 20px 22px 26px;
}
.card .card-body h3 {
 font-size: 18px;
 margin-bottom: 8px;
}
.card .card-body p {
 font-size: 15px;
 color: #555;
 margin-bottom: 0;
}
.app-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
 gap: 24px;
 margin-top: 30px;
}
.app-item {
 background: #fff;
 border-radius: 12px;
 overflow: hidden;
 box-shadow: 0 4px 16px rgba(44, 62, 80, 0.08);
 transition: box-shadow 0.3s ease;
}
.app-item:hover {
 box-shadow: 0 8px 28px rgba(44, 62, 80, 0.14);
}
.app-item .img-wrap {
 border-radius: 0;
 box-shadow: none;
 max-width: 100%;
}
.app-item .app-label {
 padding: 14px 18px 18px;
 font-weight: 600;
 color: #2C3E50;
 font-size: 16px;
 text-align: center;
 background: #fff;
}
.feature-list {
 list-style: none;
 padding: 0;
 margin: 20px 0 0;
}
.feature-list li {
 font-size: 16px;
 color: #444;
 padding: 8px 0 8px 28px;
 position: relative;
 border-bottom: 1px solid #edf0f3;
}
.feature-list li:last-child {
 border-bottom: none;
}
.feature-list li::before {
 content: "●";
 position: absolute;
 left: 0;
 top: 8px;
 color: #E87722;
 font-size: 14px;
}
.section-footer {
 background: #2C3E50;
 padding: 50px 0;
 text-align: center;
}
.section-footer p {
 color: rgba(255, 255, 255, 0.8);
 font-size: 16px;
 margin-bottom: 0;
}
.section-footer .tag {
 background: #E87722;
}
.text-center {
 text-align: center;
}
.mt-20 {
 margin-top: 20px;
}
.mb-20 {
 margin-bottom: 20px;
}
@media (max-width: 768px) {
 h1 {
  font-size: 28px;
 }
 h2 {
  font-size: 24px;
 }
 .hero {
  padding: 50px 0 40px;
 }
 .section {
  padding: 46px 0;
 }
 .flex-row {
  flex-direction: column !important;
  gap: 24px;
 }
 .flex-row .col-text,
 .flex-row .col-img {
  flex: 1 1 100%;
  min-width: 0;
 }
 .img-wrap {
  max-width: 100%;
 }
 .img-wrap img {
  width: 100%;
  height: auto;
  aspect-ratio: 600 / 450;
  object-fit: cover;
 }
 .card-grid {
  grid-template-columns: 1fr;
 }
 .app-grid {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
 }
 .container {
  padding: 0 18px;
 }
 .hero p {
  font-size: 16px;
 }
}
@media (max-width: 480px) {
 h1 {
  font-size: 22px;
 }
 h2 {
  font-size: 20px;
 }
 .app-grid {
  grid-template-columns: 1fr 1fr;
  gap: 12px;
 }
 .app-item .app-label {
  font-size: 14px;
  padding: 10px 12px 14px;
 }
 .card .card-body {
  padding: 14px 16px 20px;
 }
}

.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; }
}