/* ===== 广丰包装官网 — 全局样式 ===== */
:root{
  --primary:#c0392b;--primary-dark:#a93226;--primary-light:#e74c3c;
  --accent:#e67e22;--text:#2c3e50;--text-light:#7f8c8d;
  --bg:#fff;--bg-gray:#f8f9fa;--bg-dark:#161628;--bg-darker:#0f0f1a;
  --border:#e8e8e8;--radius:12px;--shadow:0 4px 20px rgba(0,0,0,.06);
  --shadow-hover:0 12px 40px rgba(0,0,0,.12);
  --max:1280px;
  --t:.35s cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;color:var(--text);line-height:1.7;background:var(--bg);overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* ===== Container ===== */
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ===== Header ===== */
header{position:fixed;top:0;width:100%;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);transition:var(--t)}
header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.06)}
nav{max-width:var(--max);margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;height:68px}
.logo{display:flex;align-items:center;font-size:22px;font-weight:800;color:var(--primary);padding:6px 0;letter-spacing:1px;transition:var(--t)}
.logo:hover{opacity:.8}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{font-size:15px;font-weight:500;color:var(--text);transition:var(--t);position:relative;padding:6px 0}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-links a.active::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:2px;background:var(--primary);border-radius:2px}
.nav-cta{background:var(--primary)!important;color:#fff!important;padding:9px 22px!important;border-radius:50px;font-size:14px!important}
.nav-cta:hover{background:var(--primary-dark)!important;transform:translateY(-1px)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--text);transition:var(--t);border-radius:2px}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{margin-top:68px;min-height:88vh;background:linear-gradient(135deg,#0f0f1a 0%,#1a1a2e 40%,#16213e 100%);display:flex;align-items:center;padding:60px 24px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;width:700px;height:700px;background:radial-gradient(circle,rgba(192,57,43,.12) 0%,transparent 65%);top:-250px;right:-200px;border-radius:50%}
.hero::after{content:'';position:absolute;width:500px;height:500px;background:radial-gradient(circle,rgba(230,126,34,.06) 0%,transparent 65%);bottom:-150px;left:-100px;border-radius:50%}
.hero-content{position:relative;z-index:1;max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center}
.hero-text h1{font-size:clamp(30px,4.5vw,50px);color:#fff;line-height:1.25;margin-bottom:20px;font-weight:800}
.hero-text h1 em{color:var(--primary-light);font-style:normal}
.hero-logo{display:inline-block;background:#fff;padding:14px 28px;border-radius:16px;box-shadow:0 12px 40px rgba(0,0,0,.25);margin-bottom:22px}
.hero-logo img{height:64px;width:auto;display:block}
.hero-text .tag{display:inline-block;background:rgba(192,57,43,.15);color:var(--primary-light);padding:6px 18px;border-radius:50px;font-size:13px;font-weight:600;margin-bottom:18px;border:1px solid rgba(192,57,43,.3)}
.hero-text p{font-size:17px;color:rgba(255,255,255,.65);margin-bottom:32px;max-width:520px;line-height:1.8}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:42px}
.hero-stats .stat .num{font-size:30px;font-weight:800;color:#fff}
.hero-stats .stat .num span{color:var(--primary-light)}
.hero-stats .stat .label{font-size:13px;color:rgba(255,255,255,.5);margin-top:2px}
.hero-visual{position:relative;height:420px;border-radius:20px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual .badge{position:absolute;bottom:20px;left:20px;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);padding:14px 20px;border-radius:12px;display:flex;gap:12px;align-items:center}
.hero-visual .badge .ic{width:42px;height:42px;background:var(--primary);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px}
.hero-visual .badge .tx{font-size:13px;color:var(--text)}
.hero-visual .badge .tx strong{font-size:15px}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;border-radius:50px;font-size:15px;font-weight:600;transition:var(--t);cursor:pointer;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 25px rgba(192,57,43,.3)}
.btn-outline{border:2px solid rgba(255,255,255,.25);color:#fff;background:transparent}
.btn-outline:hover{border-color:var(--primary-light);color:var(--primary-light);background:rgba(192,57,43,.1)}
.btn-dark{background:var(--bg-dark);color:#fff}
.btn-dark:hover{background:#2a2a3e;transform:translateY(-2px)}
.btn-lg{padding:16px 40px;font-size:16px}

/* ===== Section ===== */
.section{padding:88px 24px}
.section-gray{background:var(--bg-gray)}
.section-dark{background:var(--bg-dark);color:rgba(255,255,255,.8)}
.section-dark h2,.section-dark h3{color:#fff}
.section-title{text-align:center;margin-bottom:56px}
.section-title .eyebrow{color:var(--primary);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:10px}
.section-title h2{font-size:clamp(26px,3.5vw,36px);margin-bottom:14px;font-weight:800}
.section-title p{color:var(--text-light);font-size:16px;max-width:600px;margin:0 auto}
.section-title .bar{width:56px;height:3px;background:var(--primary);margin:16px auto 0;border-radius:3px}
.section-dark .section-title p{color:rgba(255,255,255,.5)}

/* ===== About / Company ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-text h3{font-size:24px;margin-bottom:18px;font-weight:700}
.about-text p{color:var(--text-light);margin-bottom:14px;font-size:15px;line-height:1.85}
.about-text .brands{display:flex;gap:16px;margin:24px 0}
.about-text .brands .brand{flex:1;padding:16px;border:1px solid var(--border);border-radius:10px;text-align:center}
.about-text .brands .brand .bn{font-size:18px;font-weight:700;color:var(--primary)}
.about-text .brands .brand .bd{font-size:12px;color:var(--text-light);margin-top:4px}
.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.stat-card{background:var(--bg);padding:28px 20px;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow);border:1px solid var(--border)}
.stat-card .num{font-size:32px;font-weight:800;color:var(--primary)}
.stat-card .label{font-size:13px;color:var(--text-light);margin-top:6px}

/* ===== Product Grid ===== */
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px}
.product-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--t);cursor:pointer;border:1px solid var(--border)}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.product-card .img-wrap{height:210px;overflow:hidden;position:relative;background:var(--bg-gray)}
.product-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:var(--t)}
.product-card:hover .img-wrap img{transform:scale(1.06)}
.product-card .tag{position:absolute;top:12px;left:12px;background:var(--primary);color:#fff;font-size:11px;padding:4px 12px;border-radius:50px;font-weight:600}
.product-card .info{padding:20px}
.product-card .info h4{font-size:17px;margin-bottom:8px;font-weight:700}
.product-card .info p{font-size:13px;color:var(--text-light);line-height:1.6;margin-bottom:14px}
.product-card .specs{display:flex;gap:8px;flex-wrap:wrap}
.product-card .specs span{font-size:11px;background:var(--bg-gray);padding:3px 10px;border-radius:50px;color:var(--text-light);border:1px solid var(--border)}
.product-card .more{display:inline-flex;align-items:center;gap:5px;color:var(--primary);font-size:13px;font-weight:600;margin-top:14px;transition:var(--t)}
.product-card:hover .more{gap:9px}

/* ===== Features ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{text-align:center;padding:36px 26px;background:var(--bg);border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--t);border:1px solid var(--border)}
.feature-card:hover{transform:translateY(-4px);border-color:var(--primary)}
.feature-card .ic{width:60px;height:60px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:16px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:26px;margin:0 auto 18px}
.feature-card h4{font-size:18px;margin-bottom:10px;font-weight:700}
.feature-card p{font-size:14px;color:var(--text-light);line-height:1.7}

/* ===== Gallery (product images) ===== */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.gallery-item{aspect-ratio:1;border-radius:10px;overflow:hidden;cursor:pointer;position:relative;background:var(--bg-gray)}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:var(--t)}
.gallery-item:hover img{transform:scale(1.08)}
.gallery-item .overlay{position:absolute;inset:0;background:rgba(0,0,0,0);transition:var(--t);display:flex;align-items:center;justify-content:center}
.gallery-item:hover .overlay{background:rgba(0,0,0,.3)}
.gallery-item .overlay span{color:#fff;font-size:13px;opacity:0;transition:var(--t)}
.gallery-item:hover .overlay span{opacity:1}

/* ===== Lightbox ===== */
.lightbox{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.92);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:var(--t)}
.lightbox.open{opacity:1;pointer-events:auto}
.lightbox img{max-width:90vw;max-height:88vh;border-radius:8px}
.lightbox .close{position:absolute;top:20px;right:30px;color:#fff;font-size:36px;cursor:pointer;line-height:1}
.lightbox .nav-btn{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.1);border:none;color:#fff;width:50px;height:50px;border-radius:50%;font-size:24px;cursor:pointer;transition:var(--t);display:flex;align-items:center;justify-content:center}
.lightbox .nav-btn:hover{background:rgba(255,255,255,.2)}
.lightbox .nav-btn.prev{left:30px}
.lightbox .nav-btn.next{right:30px}
.lightbox .counter{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.6);font-size:14px}

/* ===== Spec Table ===== */
.spec-table{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.spec-table th{background:var(--bg-dark);color:#fff;padding:14px 18px;text-align:left;font-weight:600;font-size:13px}
.spec-table td{padding:12px 18px;border-bottom:1px solid var(--border)}
.spec-table tr:nth-child(even) td{background:var(--bg-gray)}
.spec-table tr:hover td{background:#fdf2f2}
.spec-table .val{color:var(--primary);font-weight:600}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info h3{font-size:22px;margin-bottom:24px;font-weight:700}
.contact-item{display:flex;gap:16px;margin-bottom:22px;align-items:flex-start}
.contact-item .ic{width:46px;height:46px;background:var(--primary);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;flex-shrink:0}
.contact-item .tx h5{font-size:14px;margin-bottom:3px;font-weight:600}
.contact-item .tx p{font-size:14px;color:var(--text-light)}
.contact-map{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);min-height:360px}
.contact-map iframe{width:100%;height:100%;border:0;min-height:360px}

/* ===== CTA Banner ===== */
.cta-banner{background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:60px 24px;border-radius:var(--radius);text-align:center;color:#fff;margin:0 24px}
.cta-banner h2{font-size:28px;margin-bottom:12px;font-weight:800}
.cta-banner p{font-size:16px;margin-bottom:24px;opacity:.9}
.cta-banner .btn{background:#fff;color:var(--primary)}
.cta-banner .btn:hover{transform:translateY(-2px);box-shadow:0 10px 25px rgba(0,0,0,.2)}

/* ===== Process Steps ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{text-align:center;position:relative}
.step .num{width:54px;height:54px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;margin:0 auto 16px;counter-increment:step}
.step::before{content:'';position:absolute;top:27px;left:55%;width:90%;height:2px;background:var(--border);z-index:-1}
.step:last-child::before{display:none}
.step h4{font-size:16px;margin-bottom:8px;font-weight:700}
.step p{font-size:13px;color:var(--text-light);line-height:1.6}

/* ===== Footer ===== */
footer{background:var(--bg-darker);color:rgba(255,255,255,.5);padding:50px 24px 30px}
.footer-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:36px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer-col p{font-size:13px;line-height:1.8;margin-bottom:8px}
.footer-col a{display:block;font-size:13px;margin-bottom:10px;transition:var(--t)}
.footer-col a:hover{color:var(--primary-light)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .mark{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:9px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:14px}
.footer-brand .name{color:#fff;font-size:17px;font-weight:700}
.footer-bottom{max-width:var(--max);margin:0 auto;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);text-align:center;font-size:13px}
.footer-bottom a{color:var(--primary-light)}

/* ===== Reveal Animation ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ===== Page Banner ===== */
.page-banner{margin-top:68px;padding:70px 24px 50px;background:linear-gradient(135deg,#0f0f1a 0%,#1a1a2e 100%);text-align:center;position:relative;overflow:hidden}
.page-banner::before{content:'';position:absolute;width:400px;height:400px;background:radial-gradient(circle,rgba(192,57,43,.1) 0%,transparent 65%);top:-150px;right:-100px}
.page-banner h1{color:#fff;font-size:clamp(26px,4vw,38px);font-weight:800;position:relative;z-index:1}
.page-banner p{color:rgba(255,255,255,.55);font-size:16px;margin-top:10px;position:relative;z-index:1}
.breadcrumb{display:flex;gap:8px;justify-content:center;margin-top:18px;font-size:13px;color:rgba(255,255,255,.4);position:relative;z-index:1}
.breadcrumb a:hover{color:var(--primary-light)}

/* ===== Product Detail ===== */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.product-gallery .main-img{width:100%;aspect-ratio:1;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:var(--bg-gray);cursor:pointer}
.product-gallery .main-img img{width:100%;height:100%;object-fit:cover}
.product-gallery .thumbs{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:12px}
.product-gallery .thumbs img{aspect-ratio:1;object-fit:cover;border-radius:8px;cursor:pointer;border:2px solid transparent;transition:var(--t)}
.product-gallery .thumbs img:hover,.product-gallery .thumbs img.active{border-color:var(--primary)}
.product-info h2{font-size:26px;margin-bottom:8px;font-weight:800}
.product-info .model{color:var(--primary);font-weight:600;font-size:14px;margin-bottom:16px}
.product-info .desc{color:var(--text-light);font-size:15px;line-height:1.85;margin-bottom:24px}
.product-info .spec-list{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:24px}
.product-info .spec-list li{display:flex;gap:8px;font-size:14px;padding:8px 12px;background:var(--bg-gray);border-radius:8px}
.product-info .spec-list li strong{color:var(--text);min-width:70px}
.product-info .spec-list li span{color:var(--text-light)}

/* ===== Tabs ===== */
.tabs{margin-top:40px}
.tab-nav{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:28px}
.tab-nav button{padding:14px 28px;border:none;background:none;font-size:15px;font-weight:600;color:var(--text-light);cursor:pointer;transition:var(--t);border-bottom:3px solid transparent;margin-bottom:-2px}
.tab-nav button.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeIn .4s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ===== Clients ===== */
.clients-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.client-card{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:20px;text-align:center;font-size:14px;font-weight:600;color:var(--text-light);transition:var(--t)}
.client-card:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}

/* ===== Responsive ===== */
@media(max-width:980px){
  .hero-content{grid-template-columns:1fr;gap:40px}
  .hero-visual{height:300px}
  .about-grid,.contact-grid,.product-detail{grid-template-columns:1fr;gap:32px}
  .features-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none;position:absolute;top:68px;left:0;width:100%;background:#fff;flex-direction:column;padding:20px;border-bottom:1px solid var(--border);gap:0}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 24px;width:100%;border-bottom:1px solid var(--border)}
  .hamburger{display:flex}
  .product-gallery .thumbs{grid-template-columns:repeat(4,1fr)}
}
@media(max-width:640px){
  .hero-logo{padding:10px 20px;border-radius:12px;margin-bottom:18px}
  .hero-logo img{height:46px}
  .hero-stats{flex-wrap:wrap;gap:20px}
  .features-grid,.steps,.about-stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  .products-grid{grid-template-columns:1fr}
  .product-info .spec-list{grid-template-columns:1fr}
  .section{padding:56px 20px}
  .tab-nav button{padding:12px 18px;font-size:14px}
}

/* 微信客服悬浮组件 */
.cs-widget{position:fixed;right:24px;bottom:24px;z-index:9999}
.cs-btn{width:56px;height:56px;border-radius:50%;background:#07c160;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 16px rgba(7,193,96,.4);transition:transform .2s}
.cs-btn:hover{transform:scale(1.08)}
.cs-btn svg{width:28px;height:28px}
.cs-panel{position:absolute;right:0;bottom:70px;width:320px;background:#fff;border-radius:16px;box-shadow:0 8px 40px rgba(0,0,0,.15);overflow:hidden;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s}
.cs-panel.show{opacity:1;visibility:visible;transform:translateY(0)}
.cs-panel-header{background:#07c160;color:#fff;padding:18px 20px;position:relative}
.cs-panel-header h4{font-size:16px;margin:0 0 4px}
.cs-panel-header p{font-size:12px;margin:0;opacity:.9}
.cs-close{position:absolute;right:16px;top:14px;font-size:22px;cursor:pointer;opacity:.8;line-height:1}
.cs-close:hover{opacity:1}
.cs-panel-body{padding:20px}
.cs-chat-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:13px;background:#07c160;color:#fff;border-radius:10px;text-decoration:none;font-size:15px;font-weight:600;transition:background .2s}
.cs-chat-btn:hover{background:#06ad56}
.cs-contact{margin-top:16px;padding-top:16px;border-top:1px solid #eee}
.cs-contact-item{display:flex;align-items:center;gap:10px;padding:7px 0;font-size:14px;color:#333}
.cs-ic{width:32px;height:32px;border-radius:50%;background:#f5f5f5;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}
.cs-contact-item a{color:#07c160;text-decoration:none}
.cs-qr{text-align:center;margin-top:16px;padding-top:16px;border-top:1px solid #eee}
.cs-qr img{width:140px;height:140px;border-radius:8px;border:1px solid #eee;margin:0 auto}
.cs-qr p{font-size:12px;color:#999;margin-top:8px}
@media(max-width:640px){
  .cs-widget{right:16px;bottom:16px}
  .cs-panel{width:calc(100vw - 32px);right:-8px}
}


.lang-switch{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1.5px solid var(--border);border-radius:50%;font-size:12px;font-weight:700;color:var(--text);transition:all .2s!important;padding:0!important}
.lang-switch:hover{background:var(--primary);color:#fff!important;border-color:var(--primary)!important}