/* ============ 基础与变量 ============ */
:root{
  --c-primary:#1565a8;
  --c-primary-d:#0d4675;
  --c-accent:#2b9fe6;
  --c-dark:#0f1b2d;
  --c-dark-2:#16243a;
  --c-bg:#f4f8fc;
  --c-bg-2:#eef3f9;
  --c-border:#e1e8f0;
  --c-text:#243044;
  --c-muted:#6b788a;
  --c-white:#ffffff;
  --radius:6px;
  --shadow:0 10px 30px rgba(15,27,45,.08);
  --shadow-lg:0 20px 50px rgba(15,27,45,.14);
  --maxw:1240px;
  --t:.35s cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  color:var(--c-text);
  background:var(--c-white);
  line-height:1.7;
  font-size:15px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--t)}
ul{list-style:none}
.container{width:92%;max-width:var(--maxw);margin:0 auto}
.section{padding:80px 0}
.section-head{text-align:center;max-width:760px;margin:0 auto 50px}
.section-eyebrow{color:var(--c-accent);font-size:13px;letter-spacing:3px;font-weight:600;margin-bottom:10px}
.section-title{font-size:32px;font-weight:700;color:var(--c-dark);position:relative;padding-bottom:16px}
.section-title::after{content:"";position:absolute;left:50%;bottom:0;width:54px;height:3px;background:var(--c-primary);transform:translateX(-50%)}
.section-lead{color:var(--c-muted);margin-top:16px;font-size:16px}

/* 按钮 */
.btn{display:inline-block;padding:12px 30px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;border:none;transition:all var(--t)}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-d);transform:translateY(-2px);box-shadow:0 8px 20px rgba(21,101,168,.35)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.btn-ghost:hover{background:#fff;color:var(--c-primary)}

/* ============ 顶部信息栏 ============ */
.topbar{background:var(--c-dark);color:#cdd6e3;font-size:13px;padding:8px 0}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px}
.topbar a{color:#cdd6e3}
.topbar a:hover{color:var(--c-accent)}
.topbar .sep{margin:0 8px;opacity:.5}

/* ============ 导航头部 ============ */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 14px rgba(15,27,45,.06);transition:box-shadow var(--t)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:42px;height:42px;border-radius:8px;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;font-family:Arial;box-shadow:0 4px 12px rgba(21,101,168,.35)}
.logo-img{width:44px;height:44px;border-radius:10px;object-fit:cover;flex:0 0 auto;box-shadow:0 4px 12px rgba(15,27,45,.18);display:block}
.logo-text strong{display:block;font-size:20px;letter-spacing:2px;color:var(--c-dark);font-weight:800}
.logo-text em{font-style:normal;font-size:12px;color:var(--c-muted);letter-spacing:1px}
.nav{display:flex;gap:4px}
.nav a{padding:8px 14px;font-size:15px;color:var(--c-text);font-weight:500;border-radius:var(--radius);position:relative}
.nav a:hover,.nav a.active{color:var(--c-primary)}
.nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--c-primary);border-radius:2px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--c-dark);transition:var(--t)}

/* ============ Hero ============ */
.hero{position:relative;height:640px;overflow:hidden}
.hero-slides{position:absolute;inset:0}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1s ease}
.hero-slide.active{opacity:1}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,27,45,.85) 0%,rgba(15,27,45,.55) 45%,rgba(15,27,45,.25) 100%)}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;color:#fff;max-width:640px}
.hero-tag{display:inline-block;background:rgba(43,159,230,.18);border:1px solid rgba(43,159,230,.5);color:var(--c-accent);padding:5px 16px;border-radius:20px;font-size:13px;letter-spacing:2px;width:fit-content;margin-bottom:18px}
.hero-title{font-size:46px;font-weight:800;line-height:1.25;margin-bottom:18px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.hero-desc{font-size:17px;color:rgba(255,255,255,.9);margin-bottom:30px;max-width:560px}
.hero-btns{display:flex;gap:14px}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:3}
.hero-dots button{width:11px;height:11px;border-radius:50%;border:2px solid rgba(255,255,255,.7);background:transparent;cursor:pointer;transition:var(--t);padding:0}
.hero-dots button.active{background:#fff;border-color:#fff;transform:scale(1.15)}
.hero-arrows{position:absolute;top:50%;transform:translateY(-50%);width:100%;display:flex;justify-content:space-between;padding:0 18px;z-index:3;pointer-events:none}
.hero-arrow{width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.4);color:#fff;font-size:18px;cursor:pointer;transition:var(--t);pointer-events:auto;backdrop-filter:blur(4px)}
.hero-arrow:hover{background:var(--c-primary);border-color:var(--c-primary)}

/* ============ 公司简介 ============ */
.about{background:var(--c-bg)}
.about-inner{display:grid;grid-template-columns:1fr 1.1fr;gap:50px;align-items:center}
.about-media{position:relative}
.about-media img{width:100%;height:420px;object-fit:cover;border-radius:10px;box-shadow:var(--shadow-lg)}
.about-badge{position:absolute;right:-18px;bottom:30px;background:var(--c-primary);color:#fff;padding:20px 26px;border-radius:10px;text-align:center;box-shadow:0 12px 30px rgba(21,101,168,.4)}
.about-badge strong{display:block;font-size:24px;letter-spacing:1px}
.about-badge span{font-size:13px;opacity:.9}
.about-text p{color:var(--c-muted);margin:10px 0}
.about-text .section-eyebrow{text-align:left;margin-bottom:6px}
.about-text .section-title{text-align:left;font-size:30px}
.about-text .section-title::after{left:0;transform:none}
.about-text .section-lead{color:var(--c-text);font-weight:600;font-size:17px;margin:14px 0 10px}
.about-feats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0 26px}
.about-feats li{display:flex;align-items:center;gap:8px;color:var(--c-text);font-weight:500}
.about-feats i{color:var(--c-primary);font-style:normal;font-weight:800}

/* ============ 数据统计 ============ */
.stats{background:linear-gradient(120deg,var(--c-dark) 0%,var(--c-dark-2) 100%);color:#fff;padding:60px 0;position:relative;overflow:hidden}
.stats::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(43,159,230,.18),transparent 50%)}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;position:relative;z-index:1}
.stat-item{text-align:center}
.stat-num{font-size:52px;font-weight:800;color:var(--c-accent);font-family:"Arial",sans-serif;line-height:1}
.stat-label{display:block;margin-top:10px;color:#cdd6e3;font-size:15px;letter-spacing:1px}

/* ============ 产品中心 ============ */
.products{background:#fff}
.product-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:30px;flex-wrap:wrap}
.tab-btn{padding:11px 26px;border:1.5px solid var(--c-border);background:#fff;color:var(--c-text);border-radius:30px;font-size:15px;font-weight:600;cursor:pointer;transition:var(--t)}
.tab-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.tab-btn.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(21,101,168,.3)}
.tab-panel{display:none;animation:fadeUp .5s ease}
.tab-panel.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.product-layout{display:grid;grid-template-columns:1.1fr 1.3fr;gap:36px;align-items:center;background:var(--c-bg);border-radius:10px;padding:30px;border:1px solid var(--c-border)}
.product-diagram{text-align:center}
.product-diagram img{width:100%;max-width:460px;margin:0 auto;border-radius:8px}
.diagram-caption{margin-top:16px;padding:14px 18px;background:#fff;border-radius:8px;border:1px solid var(--c-border);text-align:left}
.diagram-caption .dc-title{font-size:16px;font-weight:700;color:var(--c-primary);margin-bottom:6px}
.diagram-caption .dc-desc{font-size:13px;color:var(--c-muted);line-height:1.6}
.product-table-wrap{overflow-x:auto}
.product-table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden;box-shadow:var(--shadow);font-size:14px}
.product-table th{background:var(--c-primary);color:#fff;padding:12px 10px;font-weight:600;text-align:center;white-space:nowrap}
.product-table td{padding:11px 10px;text-align:center;border-bottom:1px solid var(--c-border)}
.product-table tbody tr:nth-child(even){background:var(--c-bg)}
.product-table tbody tr:hover{background:#e8f1fa}

/* ============ 生产流程 ============ */
.process{background:var(--c-bg)}
.process-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;justify-content:center}
.process-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:14px 18px;background:#fff;border:2px solid var(--c-border);border-radius:10px;cursor:pointer;transition:var(--t);width:175px;flex:0 0 175px}
.process-tab:hover{border-color:var(--c-accent);transform:translateY(-3px)}
.process-tab.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(21,101,168,.3)}
.process-tab-no{font-size:20px;font-weight:800}
.process-tab-name{font-size:13px;font-weight:500;line-height:1.35;text-align:center;white-space:normal;word-break:break-word}
.process-panels{position:relative}
.process-panel{display:none;animation:fadeIn .4s ease}
.process-panel.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.process-panel-head{text-align:center;margin-bottom:24px}
.process-panel-head h3{font-size:22px;color:var(--c-dark);font-weight:700}
.process-panel-head p{color:var(--c-muted);margin-top:6px;font-size:15px}
.process-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.process-steps.single{display:flex;justify-content:center}
.process-steps.single .process-step{flex:0 0 calc((100% - 54px)/4);max-width:340px}
.process-step{position:relative;border-radius:10px;overflow:hidden;box-shadow:var(--shadow);background:#fff;transition:var(--t)}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.process-step img{width:100%;aspect-ratio:3/2;object-fit:cover;display:block}
.process-step .step-no{display:none}

/* ============ 定制服务 ============ */
.custom{background:#fff}
.custom-block{margin-bottom:50px}
.custom-block:last-child{margin-bottom:0}
.custom-head{text-align:center;margin-bottom:24px}
.custom-head h3{font-size:22px;color:var(--c-dark);font-weight:700}
.custom-head p{color:var(--c-muted);margin-top:6px}
.custom-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.pkg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pkg-grid .custom-card{max-width:none;width:100%}
.pkg-grid .custom-card img{height:230px}
.pkg-grid .custom-card span{padding:14px 8px;font-size:15px}
.custom-card{background:var(--c-bg);border:1px solid var(--c-border);border-radius:10px;overflow:hidden;text-align:center;transition:var(--t);max-width:220px}
.custom-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--c-accent)}
.custom-card img{width:100%;height:120px;object-fit:contain;background:#fff;padding:6px}
.custom-card span{display:block;padding:12px 6px;font-size:14px;font-weight:600;color:var(--c-text)}
.color-grid{display:grid;grid-template-columns:repeat(11,1fr);gap:14px}
.color-chip{text-align:center;cursor:pointer;transition:var(--t);position:relative}
.color-chip:hover{transform:translateY(-4px)}
.color-chip span{display:block;width:100%;aspect-ratio:1;border-radius:10px;background:var(--c);border:1px solid rgba(0,0,0,.08);box-shadow:inset 0 -6px 12px rgba(0,0,0,.12),0 4px 10px rgba(0,0,0,.1);margin-bottom:8px;transition:var(--t)}
.color-chip em{font-style:normal;font-size:13px;color:var(--c-text);font-weight:500}
.color-chip.active span{box-shadow:inset 0 -6px 12px rgba(0,0,0,.12),0 0 0 3px var(--c-primary),0 4px 10px rgba(0,0,0,.15)}
.color-chip.active em{color:var(--c-primary);font-weight:700}
.color-custom-wrap{display:flex;flex-direction:column;gap:20px}
.color-preview{text-align:center;max-width:360px;margin:0 auto}
.color-preview img{width:auto;max-width:100%;height:360px;object-fit:contain;border-radius:8px;transition:opacity .25s,transform .4s;opacity:1}
.color-preview img:hover{transform:scale(1.02)}
.preview-label{margin-top:12px;font-size:16px;font-weight:700;color:var(--c-primary);letter-spacing:1px}
@media(max-width:900px){.color-grid{grid-template-columns:repeat(6,1fr)}}

/* ============ 应用领域 ============ */
.application{background:var(--c-bg)}
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.app-card{position:relative;height:260px;border-radius:10px;overflow:hidden;box-shadow:var(--shadow);display:block}
.app-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.app-card:hover img{transform:scale(1.1)}
.app-mask{position:absolute;inset:0;background:linear-gradient(to top,rgba(15,27,45,.92) 0%,rgba(15,27,45,.3) 60%,transparent 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:24px;color:#fff;transition:background var(--t)}
.app-card:hover .app-mask{background:linear-gradient(to top,rgba(21,101,168,.92) 0%,rgba(21,101,168,.4) 60%,transparent 100%)}
.app-mask h3{font-size:20px;font-weight:700;margin-bottom:6px}
.app-mask p{font-size:13px;color:rgba(255,255,255,.9)}

/* ============ 销售网络 ============ */
.network{background:#fff}
.network-inner{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.network-text p{color:var(--c-muted);margin-bottom:24px}
.network-text b{color:var(--c-primary)}
.net-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.net-list li{display:flex;align-items:center;gap:10px;color:var(--c-text);font-weight:500;background:var(--c-bg);padding:14px 18px;border-radius:8px;border-left:3px solid var(--c-primary)}
.net-dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent);flex-shrink:0;box-shadow:0 0 0 4px rgba(43,159,230,.2)}
.network-media img{width:100%;height:360px;object-fit:cover;border-radius:10px;box-shadow:var(--shadow-lg)}

/* ============ 联系我们 ============ */
.contact{background:var(--c-bg)}
.contact-inner{display:grid;grid-template-columns:1fr;gap:40px}
.contact-info{background:#fff;border-radius:10px;padding:34px;box-shadow:var(--shadow);border-top:4px solid var(--c-primary);max-width:680px;width:100%;justify-self:center}
.ci-row{display:flex;gap:16px;margin-bottom:24px;align-items:flex-start}
.ci-icon{width:46px;height:46px;border-radius:10px;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.ci-icon svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ci-row h4{font-size:14px;color:var(--c-muted);margin-bottom:4px;font-weight:600}
.ci-row p{color:var(--c-text);font-size:15px}
.ci-row a{color:var(--c-primary);font-weight:600}

/* ============ 页脚 ============ */
.footer{background:var(--c-dark);color:#aeb9c8;padding:50px 0 0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:36px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:30px;height:2px;background:var(--c-accent)}
.footer-col ul li{margin-bottom:10px;font-size:14px}
.footer-col ul li a{color:#aeb9c8}
.footer-col ul li a:hover{color:var(--c-accent);padding-left:4px}
.logo-light .logo-text strong{color:#fff}
.logo-light .logo-text em{color:#aeb9c8}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;font-size:13px}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;color:#8794a6}
.footer-bottom .icp-link{color:#8794a6;text-decoration:none;white-space:nowrap}
.footer-bottom .icp-link:hover{color:#fff}

/* ============ 返回顶部 ============ */
.back-top{position:fixed;right:24px;bottom:30px;width:46px;height:46px;border-radius:50%;background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;box-shadow:0 8px 20px rgba(21,101,168,.4);opacity:0;visibility:hidden;transform:translateY(20px);transition:var(--t);z-index:90}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--c-primary-d);transform:translateY(-3px)}

/* ============ 右侧浮动语言切换 ============ */
.lang-float{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:90;padding:14px 12px;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;border:none;border-radius:10px 0 0 10px;font-size:14px;font-weight:700;letter-spacing:1px;line-height:1.2;cursor:pointer;box-shadow:-4px 6px 18px rgba(21,101,168,.35);transition:padding-right .25s ease,filter .25s ease}
.lang-float:hover{filter:brightness(1.08);padding-right:18px}
.lang-float:active{transform:translateY(-50%) scale(.96)}
@media(max-width:600px){.lang-float{font-size:12px;padding:11px 9px}}

/* ============ 滚动出现动画 ============ */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;padding:14px;box-shadow:0 10px 30px rgba(0,0,0,.1);gap:0}
  .nav.open{display:flex}
  .nav a{padding:12px 16px;border-radius:0;border-bottom:1px solid var(--c-bg)}
  .nav a.active::after{display:none}
  .nav-toggle{display:flex}
  .about-inner,.product-layout,.network-inner,.contact-inner{grid-template-columns:1fr;gap:30px}
  .product-diagram{position:static}
  .about-media img{height:340px}
  .process-grid,.app-grid,.process-steps{grid-template-columns:repeat(2,1fr)}
  .process-steps.single .process-step{flex-basis:calc((100% - 18px)/2);max-width:420px}
  .custom-grid{grid-template-columns:repeat(3,1fr)}
  .color-grid{grid-template-columns:repeat(6,1fr)}
  .stats-inner{grid-template-columns:repeat(2,1fr);gap:24px}
  .footer-inner{grid-template-columns:1fr 1fr}
  .hero-title{font-size:36px}
  .about-badge{right:10px}
  .pkg-grid{gap:16px}
  .pkg-grid .custom-card img{height:200px}
}
@media (max-width:640px){
  .section{padding:55px 0}
  .section-title{font-size:26px}
  .hero{height:560px}
  .hero-title{font-size:28px}
  .hero-desc{font-size:15px}
  .process-grid,.app-grid,.custom-grid,.stats-inner,.net-list,.footer-inner,.process-steps{grid-template-columns:1fr}
  .process-steps.single .process-step{flex-basis:100%;max-width:560px}
  .color-grid{grid-template-columns:repeat(4,1fr)}
  .about-feats{grid-template-columns:1fr}
  .topbar-left{display:none}
  .custom-grid:not(.pkg-grid) .custom-card{justify-self:center;width:100%;max-width:300px}
  .footer-bottom .container{justify-content:center;text-align:center}
  .pkg-grid{gap:18px}
  .pkg-grid .custom-card{max-width:440px;justify-self:center;width:100%}
  .pkg-grid .custom-card img{height:240px}
}