:root{--blue:#1565C0;--blue-light:#1976D2;--blue-dark:#0D47A1;--blue-50:#E3F2FD;--blue-100:#BBDEFB;--orange:#FF6B35;--orange-dark:#E55A2B;--gray-50:#F8FAFC;--gray-100:#F1F5F9;--gray-200:#E2E8F0;--gray-300:#CBD5E1;--gray-400:#94A3B8;--gray-500:#64748B;--gray-600:#475569;--gray-700:#334155;--gray-800:#1E293B;--gray-900:#0F172A;--max-w:1200px;--header-h:64px;--radius:8px;--radius-lg:16px;--shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow:0 4px 12px rgba(0,0,0,.08);--shadow-lg:0 12px 32px rgba(0,0,0,.12);--shadow-blue:0 4px 14px rgba(21,101,192,.3);--shadow-orange:0 4px 14px rgba(255,107,53,.3)}
*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;font-size:16px;line-height:1.7;color:var(--gray-800);background:#fff;overflow-x:hidden}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{cursor:pointer;font-family:inherit;border:none;background:none}input,select,textarea{font-family:inherit;font-size:16px;outline:none}ul{list-style:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}.section{padding:64px 0}.section-title{text-align:center;margin-bottom:40px}.section-title h2{font-size:30px;font-weight:800;color:var(--gray-900);margin-bottom:12px}.section-title p{font-size:16px;color:var(--gray-500)}.section-title .badge{display:inline-block;background:var(--blue-50);color:var(--blue);font-size:13px;font-weight:700;padding:5px 14px;border-radius:20px;margin-bottom:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:16px;font-weight:700;transition:all .2s;white-space:nowrap;text-align:center;cursor:pointer;border:2px solid transparent}
.btn-primary{background:var(--blue);color:#fff;box-shadow:var(--shadow-blue)}.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
.btn-orange{background:var(--orange);color:#fff;box-shadow:var(--shadow-orange)}.btn-orange:hover{background:var(--orange-dark);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--blue);border-color:var(--blue)}.btn-outline:hover{background:var(--blue);color:#fff}
.btn-white{background:#fff;color:var(--blue)}.btn-white:hover{background:var(--blue-50);transform:translateY(-2px)}
.btn-lg{padding:16px 36px;font-size:18px}.btn-block{width:100%}

/* Header */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);box-shadow:var(--shadow-sm);height:var(--header-h)}.header .container{display:flex;align-items:center;height:100%;gap:24px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}.logo-icon{width:36px;height:36px;flex-shrink:0}.logo-text{font-size:20px;font-weight:800;color:var(--gray-900)}.logo-text span{color:var(--blue)}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-shrink:0}.nav a{padding:8px 9px;font-size:13px;font-weight:600;color:var(--gray-600);border-radius:8px;transition:all .15s;cursor:pointer;white-space:nowrap;flex-shrink:0;text-decoration:none}.nav a:hover{color:var(--blue);background:var(--blue-50)}
.header-phone{display:flex;align-items:center;gap:10px;flex-shrink:0;padding:8px 18px;background:linear-gradient(135deg,#FFF3E0,#FFF8F0);border-radius:30px;border:1.5px solid #FFE0B2}.header-phone .phone-icon-wrap{width:38px;height:38px;background:var(--orange);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;animation:phonePulse 2s ease-in-out infinite}@keyframes phonePulse{0%,100%{box-shadow:0 0 0 0 rgba(255,107,53,.4)}50%{box-shadow:0 0 0 10px rgba(255,107,53,0)}}.header-phone .phone-icon-wrap svg{width:18px;height:18px;color:#fff}.header-phone .phone-info{display:flex;flex-direction:column;line-height:1.15}.header-phone .phone-label{font-size:11px;color:var(--gray-400);font-weight:600;letter-spacing:.5px}.header-phone .phone-num{font-size:22px;font-weight:900;color:var(--orange);text-decoration:none;letter-spacing:.5px;white-space:nowrap}
.header-cta{display:flex;align-items:center;gap:12px}.menu-toggle{display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px}.menu-toggle span{display:block;width:24px;height:2px;background:var(--gray-800);border-radius:2px;transition:all .2s}
.menu-toggle.active span:nth-child(1){transform:translateY(7px)rotate(45deg)}.menu-toggle.active span:nth-child(2){opacity:0}.menu-toggle.active span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}
.mobile-nav{position:fixed;top:var(--header-h);left:0;right:0;z-index:999;background:#fff;box-shadow:var(--shadow);padding:12px 20px;display:none;flex-direction:column;gap:4px;max-height:calc(100vh - var(--header-h));overflow-y:auto}.mobile-nav.active{display:flex}.mobile-nav a{padding:12px 14px;font-size:16px;font-weight:600;color:var(--gray-700);border-radius:8px;border-bottom:1px solid var(--gray-100)}.mobile-nav a:hover{color:var(--blue)}.mobile-nav .btn{margin-top:8px}

/* Footer */
.footer{background:var(--gray-900);color:rgba(255,255,255,.7);padding:48px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-brand .logo-text{color:#fff}.footer-brand .logo-text span{color:var(--blue-100)}.footer-brand p{font-size:14px;color:rgba(255,255,255,.5);margin:16px 0;max-width:300px}.footer-brand .footer-phone{display:flex;align-items:center;gap:10px}.footer-brand .footer-phone .num{font-size:24px;font-weight:900;color:var(--orange)}.footer-brand .footer-phone .label{font-size:12px;color:rgba(255,255,255,.4)}.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}.footer-col ul{display:flex;flex-direction:column;gap:10px}.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.5);transition:color .15s;cursor:pointer}.footer-col ul li a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}

/* Floating Widgets */
.float-widgets{position:fixed;right:24px;bottom:24px;z-index:800;display:flex;flex-direction:column;gap:12px}
.float-btn{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);transition:all .2s;position:relative}
.float-btn:hover{transform:scale(1.1)}.float-btn svg{width:26px;height:26px}.float-phone{background:var(--orange)}.float-phone svg{color:#fff}
.float-chat{background:var(--blue)}.float-chat svg{color:#fff}.float-btn .badge{position:absolute;top:-4px;right:-4px;background:#EF4444;color:#fff;font-size:10px;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}
.float-top{background:var(--gray-700)}.float-top svg{color:#fff}
.float-btn .float-label{position:absolute;right:64px;white-space:nowrap;background:var(--gray-900);color:#fff;padding:6px 12px;border-radius:6px;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s}.float-btn:hover .float-label{opacity:1}

/* Camera Specific */
.cam-hero{margin-top:var(--header-h);background:linear-gradient(135deg,#0a1929 0%,#1565C0 100%);color:#fff;position:relative;overflow:hidden;padding:60px 0}
.cam-hero::before{content:'';position:absolute;inset:0;background-image:radial-gradient(circle at 20% 50%,rgba(255,107,53,.15)0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(82,156,255,.15)0%,transparent 50%)}
.cam-hero .container{position:relative;z-index:1}
.cam-hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;align-items:center}
.cam-hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:var(--orange);border-radius:24px;font-size:13px;font-weight:700;margin-bottom:20px}
.cam-hero h1{font-size:38px;font-weight:900;line-height:1.2;margin-bottom:20px}
.cam-hero h1 span{color:var(--orange)}
.cam-hero p{font-size:17px;color:rgba(255,255,255,.85);margin-bottom:24px;line-height:1.7}
.cam-hero-feats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:24px}
.cam-hero-feat{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.9)}
.cam-hero-feat svg{width:18px;height:18px;color:#4ADE80;flex-shrink:0}
.cam-hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.cam-hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:20px;background:rgba(255,255,255,.1);border-radius:var(--radius-lg);backdrop-filter:blur(8px)}
.cam-hero-stat{text-align:center}.cam-hero-stat strong{display:block;font-size:26px;color:var(--orange);font-weight:900}.cam-hero-stat span{font-size:12px;color:rgba(255,255,255,.7)}
.cam-hero-img{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.cam-hero-img img{width:100%;height:400px;object-fit:cover}
.cam-hero-img-badge{position:absolute;bottom:16px;left:16px;right:16px;background:rgba(255,255,255,.95);border-radius:var(--radius);padding:14px 18px;font-size:14px;color:var(--gray-700)}
.cam-hero-img-badge strong{color:var(--blue);display:block}

.cam-why{background:var(--gray-50)}
.cam-why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cam-why-card{background:#fff;padding:28px;border-radius:var(--radius-lg);border:1px solid var(--gray-100);text-align:center;transition:all .2s}
.cam-why-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cam-why-icon{width:56px;height:56px;background:var(--blue);border-radius:14px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.cam-why-icon svg{width:28px;height:28px;color:#fff}
.cam-why-card h3{font-size:18px;font-weight:800;margin-bottom:8px}
.cam-why-card p{font-size:13px;color:var(--gray-500);line-height:1.6}

.cam-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cam-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .2s}
.cam-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cam-card-img{height:180px;overflow:hidden}.cam-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.cam-card:hover .cam-card-img img{transform:scale(1.06)}
.cam-card-body{padding:24px}
.cam-card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.cam-card-tag{padding:4px 10px;background:var(--blue-50);color:var(--blue);font-size:12px;border-radius:12px;font-weight:600}
.cam-card h3{font-size:19px;font-weight:800;margin-bottom:8px}
.cam-card .desc{font-size:13px;color:var(--gray-500);line-height:1.7;margin-bottom:14px}
.cam-card-price{padding-top:14px;border-top:1px solid var(--gray-100);display:flex;align-items:baseline;justify-content:space-between}
.cam-card-price .lab{font-size:12px;color:var(--gray-500)}.cam-card-price strong{font-size:24px;color:var(--orange);font-weight:900}

.cam-process{background:var(--gray-50)}
.cam-process-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative}
.cam-process-grid::before{content:'';position:absolute;top:32px;left:10%;right:10%;height:2px;background:linear-gradient(to right,transparent,var(--blue-100)10%,var(--blue-100)90%,transparent)}
.cam-step{text-align:center;padding:20px 10px;position:relative}
.cam-step-num{width:52px;height:52px;background:var(--blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;margin:0 auto 14px;position:relative;z-index:1;box-shadow:0 0 0 6px #fff}
.cam-step h4{font-size:15px;font-weight:700;margin-bottom:6px}.cam-step p{font-size:12px;color:var(--gray-500);line-height:1.5}

.cam-pricing{background:#fff}
.cam-pricing-table{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);margin-bottom:20px}
.cam-pricing-table table{width:100%;border-collapse:collapse}
.cam-pricing-table th{background:var(--blue);color:#fff;padding:14px 20px;text-align:left;font-size:15px;font-weight:700}
.cam-pricing-table td{padding:12px 20px;border-bottom:1px solid var(--gray-100);font-size:14px;color:var(--gray-700)}
.cam-pricing-table tr:hover td{background:var(--blue-50)}
.cam-pricing-table .price{color:var(--orange);font-weight:900;font-size:16px}
.cam-pricing-table .pkg{font-weight:700;color:var(--gray-900)}

.cam-cases-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cam-case{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .2s}
.cam-case:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cam-case-img{height:200px;position:relative;overflow:hidden}
.cam-case-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.cam-case:hover .cam-case-img img{transform:scale(1.05)}
.cam-case-tag{position:absolute;top:14px;left:14px;padding:6px 14px;background:var(--orange);color:#fff;border-radius:16px;font-size:12px;font-weight:700}
.cam-case-body{padding:22px}
.cam-case-body h3{font-size:17px;font-weight:800;margin-bottom:6px}
.cam-case-body .loc{font-size:12px;color:var(--blue);font-weight:600;margin-bottom:10px}
.cam-case-body p{font-size:13px;color:var(--gray-500);line-height:1.6;margin-bottom:14px}
.cam-case-specs{display:flex;gap:14px;padding-top:14px;border-top:1px solid var(--gray-100);font-size:12px;color:var(--gray-500)}
.cam-case-specs span strong{color:var(--gray-900);font-weight:700}

.cam-brands{background:var(--gray-50)}
.cam-brand-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.cam-brand-card{background:#fff;padding:28px 14px;text-align:center;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:all .2s}
.cam-brand-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cam-brand-card .bn{font-size:20px;font-weight:800;color:var(--gray-800);margin-bottom:4px}
.cam-brand-card .be{font-size:11px;color:var(--gray-400);margin-bottom:8px}
.cam-brand-card .bc{font-size:12px;color:var(--blue);font-weight:600}

.cam-book{background:linear-gradient(135deg,#0a1929 0%,#1565C0 100%);color:#fff}
.cam-book .section-title h2,.cam-book .section-title p{color:#fff}.cam-book .section-title p{color:rgba(255,255,255,.85)}
.cam-book-wrap{display:grid;grid-template-columns:1fr 1.5fr;gap:40px;background:rgba(255,255,255,.05);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);padding:36px}
.cam-book-info h3{font-size:22px;font-weight:800;margin-bottom:14px}.cam-book-info>p{font-size:14px;color:rgba(255,255,255,.85);margin-bottom:20px;line-height:1.7}
.cam-book-fit{display:flex;gap:12px;margin-bottom:14px}.cam-book-fit .ic{width:36px;height:36px;background:var(--orange);border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.cam-book-fit .ic svg{width:18px;height:18px;color:#fff}
.cam-book-fit h4{font-size:15px;color:#fff;margin-bottom:2px}.cam-book-fit p{font-size:13px;color:rgba(255,255,255,.7)}
.cam-form .fr{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:10px}.cam-form .fg{margin-bottom:10px}
.cam-form label{display:block;font-size:13px;color:rgba(255,255,255,.85);margin-bottom:6px;font-weight:600}
.cam-form label .req{color:var(--orange)}.cam-form input,.cam-form select,.cam-form textarea{width:100%;padding:12px 14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);border-radius:6px;font-size:14px;color:#fff}.cam-form input::placeholder,.cam-form textarea::placeholder{color:rgba(255,255,255,.4)}.cam-form input:focus,.cam-form select:focus,.cam-form textarea:focus{outline:none;border-color:var(--orange);background:rgba(255,255,255,.12)}.cam-form select option{color:#333;background:#fff}.cam-form textarea{resize:vertical;min-height:80px}
.cam-form .fs{width:100%;padding:14px;background:var(--orange);color:#fff;border-radius:8px;font-size:16px;font-weight:700;margin-top:6px;transition:all .15s;border:none;cursor:pointer}.cam-form .fs:hover{background:var(--orange-dark);transform:translateY(-2px)}.cam-form .fn{text-align:center;color:rgba(255,255,255,.6);font-size:12px;margin-top:10px}

@media(max-width:1024px){.cam-hero-grid{grid-template-columns:1fr}.cam-why-grid{grid-template-columns:repeat(2,1fr)}.cam-grid{grid-template-columns:repeat(2,1fr)}.cam-brand-grid{grid-template-columns:repeat(2,1fr)}.cam-cases-grid{grid-template-columns:1fr}.cam-book-wrap{grid-template-columns:1fr;padding:24px}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.nav,.header-phone,.header-cta .btn-outline{display:none}.menu-toggle{display:flex;margin-left:auto}.header-cta{margin-left:0}.header .container{gap:12px}
.cam-hero{padding:40px 0}.cam-hero h1{font-size:26px}.cam-hero p{font-size:15px}.cam-hero-feats{grid-template-columns:1fr}.cam-hero-stats{grid-template-columns:repeat(2,1fr)}.cam-hero-stats strong{font-size:22px}.cam-hero-img img{height:260px}
.cam-why-grid,.cam-grid,.cam-brand-grid{grid-template-columns:1fr}.cam-process-grid{grid-template-columns:repeat(2,1fr)}.cam-process-grid::before{display:none}.cam-form .fr{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:24px}.section{padding:40px 0}.section-title h2{font-size:24px}}


/* 返回顶部按钮样式 */

/* 弱电工程下拉菜单 */
.nav-dropdown{position:relative;display:inline-block}
.dropdown-toggle{display:flex;align-items:center;gap:2px;cursor:pointer}
.dropdown-arrow{font-size:10px;transition:transform .2s}
.nav-dropdown:hover .dropdown-arrow{transform:rotate(180deg)}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;background:#fff;min-width:160px;box-shadow:0 4px 16px rgba(0,0,0,.12);border-radius:0 0 8px 8px;z-index:1000;padding:8px 0;border-top:2px solid #1565C0}
.dropdown-menu a{display:block;padding:10px 20px;font-size:14px;color:#333;white-space:nowrap}
.dropdown-menu a:hover{background:#E3F2FD;color:#1565C0}
.nav-dropdown:hover .dropdown-menu{display:block}
@media(max-width:768px){.nav-dropdown{display:none}}


.float-widgets{position:fixed;right:20px;bottom:80px;z-index:999;display:flex;flex-direction:column;gap:10px}
.float-btn{width:48px;height:48px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;position:relative;transition:all .3s;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.float-btn svg{width:22px;height:22px}
.float-top{background:#1565C0;color:#fff}
.float-top:hover{background:#0D47A1;transform:translateY(-2px)}
.float-label{position:absolute;right:60px;background:#333;color:#fff;padding:4px 10px;border-radius:4px;font-size:12px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .3s}
.float-btn:hover .float-label{opacity:1}
@media(max-width:768px){.float-widgets{right:10px;bottom:60px}.float-btn{width:42px;height:42px}}

/* 汉堡菜单悬停高亮 */
.menu-toggle:hover {
  background: #E3F2FD;
  border-radius: 8px;
}
.menu-toggle:hover span {
  background: #0D47A1;
}