* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: #f5f6fa; color: #2C3E50; line-height: 1.7; }
.hero { background: linear-gradient(135deg, #2C3E50 0%, #1a2a3a 100%); padding: 80px 20px; text-align: center; position: relative; overflow: hidden; min-height: 420px; display: flex; align-items: center; justify-content: center; flex-direction: column; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: url('/images/77.jpg') center/cover no-repeat; opacity: 0.2; }
.hero h1 { font-size: 2.8rem; font-weight: 700; color: #fff; position: relative; z-index: 1; letter-spacing: 2px; text-shadow: 0 2px 12px rgba(0,0,0,0.3); max-width: 900px; margin: 0 auto 20px; }
.hero .sub { font-size: 1.2rem; color: #E87722; position: relative; z-index: 1; font-weight: 400; letter-spacing: 1px; border-top: 2px solid #E87722; padding-top: 18px; display: inline-block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; border-bottom: 1px solid #e8ecf1; }
.section:last-of-type { border-bottom: none; }
.section-inner { display: flex; align-items: center; gap: 50px; flex-wrap: wrap; }
.section-inner.reverse { flex-direction: row-reverse; }
.section-img { flex: 0 0 480px; max-width: 100%; }
.section-img img { width: 100%; height: auto; aspect-ratio: 600/450; object-fit: cover; border-radius: 8px; box-shadow: 0 8px 30px rgba(44,62,80,0.15); display: block; }
.section-text { flex: 1; min-width: 280px; }
.section-text h2 { font-size: 1.8rem; color: #2C3E50; margin-bottom: 18px; position: relative; padding-bottom: 12px; }
.section-text h2::after { content: ''; position: absolute; bottom: 0; left: 0; width: 60px; height: 3px; background: #E87722; }
.section-text h3 { font-size: 1.3rem; color: #E87722; margin: 18px 0 10px; font-weight: 600; }
.section-text p { font-size: 1rem; color: #3d5166; margin-bottom: 14px; }
.section-text ul { list-style: none; padding: 0; margin: 12px 0; }
.section-text ul li { padding: 6px 0 6px 28px; position: relative; font-size: 0.98rem; color: #3d5166; }
.section-text ul li::before { content: '▸'; position: absolute; left: 0; color: #E87722; font-weight: 700; font-size: 1.1rem; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 30px; }
.case-grid img { width: 100%; height: auto; aspect-ratio: 600/450; object-fit: cover; border-radius: 8px; box-shadow: 0 4px 20px rgba(44,62,80,0.12); transition: transform 0.3s ease; display: block; }
.case-grid img:hover { transform: scale(1.03); }
.tag { display: inline-block; background: #E87722; color: #fff; padding: 4px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 12px; }
.bg-light { background: #fff; }
.bg-gray { background: #f0f2f5; }
.conclusion { background: #2C3E50; padding: 60px 20px; text-align: center; color: #fff; }
.conclusion h2 { font-size: 1.8rem; margin-bottom: 16px; color: #fff; }
.conclusion h2::after { background: #E87722; margin: 12px auto 0; }
.conclusion p { max-width: 800px; margin: 0 auto; font-size: 1.05rem; opacity: 0.9; }
.conclusion .highlight { color: #E87722; font-weight: 600; }
@media (max-width: 1024px) {
.section-img { flex: 0 0 380px; }
}
@media (max-width: 768px) {
.hero { padding: 50px 20px; min-height: 300px; }
.hero h1 { font-size: 1.8rem; }
.hero .sub { font-size: 1rem; }
.section { padding: 40px 0; }
.section-inner { flex-direction: column !important; gap: 30px; }
.section-img { flex: 0 0 auto; width: 100%; max-width: 600px; margin: 0 auto; }
.section-text h2 { font-size: 1.5rem; }
.case-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
@media (max-width: 480px) {
.hero h1 { font-size: 1.4rem; }
.hero .sub { font-size: 0.9rem; }
.section-text h2 { font-size: 1.3rem; }
.case-grid { grid-template-columns: 1fr; gap: 16px; }
.container { padding: 0 14px; }
}

.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; }
}