/* ==========================================================================
   贝贝星电子 · 新版网站样式  (保留原站蓝红商务科技风, 现代化/响应式)
   主色 科技蓝 #0078D7 / 辅色 中国红 #C41E3A / 深色 #1B2838
   ========================================================================== */

:root{
  --c-blue:#0078D7;        /* 主色 科技蓝 */
  --c-blue-d:#005A9E;      /* 主色暗 */
  --c-blue-l:#3a96e0;      /* 主色亮 */
  --c-red:#C41E3A;         /* 辅色 中国红 */
  --c-ink:#1B2838;         /* 深色 */
  --c-ink-d:#0F1923;       /* 更深 */
  --c-text:#2b2b2b;
  --c-muted:#666;
  --c-border:#e8eaee;
  --c-bg:#ffffff;
  --c-alt:#f4f7fb;         /* 浅蓝灰背景 */
  --radius:8px;
  --shadow:0 4px 18px rgba(20,50,90,.08);
  --shadow-h:0 12px 32px rgba(20,50,90,.18);
  --maxw:1200px;
  --font:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--c-text);background:#fff;line-height:1.75;font-size:15px;-webkit-font-smoothing:antialiased;word-break:break-word;overflow-wrap:break-word}
a{text-decoration:none;color:inherit;transition:color .2s}
img{max-width:100%;display:block}
ul,ol,li{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.text-blue{color:var(--c-blue)}
.text-red{color:var(--c-red)}

/* ---------------- 头部 Header ---------------- */
.header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-border);transition:box-shadow .25s}
.header.scrolled{box-shadow:0 2px 14px rgba(20,50,90,.10)}
.header-inner{display:flex;align-items:center;height:68px;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo img{height:44px}
.logo .brand-txt{font-size:20px;font-weight:700;color:var(--c-ink);letter-spacing:.5px}
.nav{display:flex;gap:2px;margin-left:auto}
.nav > li{position:relative;list-style:none}
.nav > li::marker{content:none}
.nav > li > a{display:flex;align-items:center;gap:4px;padding:10px 16px;font-size:15px;font-weight:500;color:#333;border-radius:4px;transition:color .2s}
.nav > li > a:hover,.nav > li > a.active{color:var(--c-blue)}
.nav > li > a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:var(--c-blue);border-radius:1px}
.nav > li > a .arrow{font-size:10px;transition:transform .2s}
.nav > li:hover > a .arrow{transform:rotate(180deg)}
.nav > li > a.active .arrow{transform:rotate(180deg)}

/* 下拉菜单 */
.nav .dropdown{position:absolute;top:100%;left:0;min-width:200px;background:#fff;border:1px solid var(--c-border);border-radius:6px;box-shadow:0 8px 24px rgba(20,50,90,.12);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .2s,transform .2s,visibility .2s;padding:8px 0;z-index:1001}
.nav > li:hover .dropdown,.nav > li.dropdown-open .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav .dropdown a{display:block;padding:10px 20px;font-size:14px;color:#444;transition:all .15s}
.nav .dropdown a:hover{background:var(--c-alt);color:var(--c-blue);padding-left:24px}
.nav .dropdown a.active{color:var(--c-blue);font-weight:600}

.header-right{display:flex;align-items:center;gap:18px;margin-left:22px}
.icon-btn{width:38px;height:38px;display:flex;align-items:center;justify-content:center;border-radius:50%;color:#555;cursor:pointer}
.icon-btn:hover{background:var(--c-alt);color:var(--c-blue)}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:34px;height:34px;align-items:center;justify-content:center;cursor:pointer;margin-left:auto}
.nav-toggle span{width:22px;height:2px;background:#333;border-radius:1px;transition:.25s}

/* ---------------- 按钮 ---------------- */
.btn{display:inline-block;padding:12px 30px;border-radius:4px;font-size:15px;font-weight:500;transition:.2s;cursor:pointer;border:none;line-height:1}
.btn-primary{background:var(--c-blue);color:#fff}
.btn-primary:hover{background:var(--c-blue-d);transform:translateY(-1px);box-shadow:0 8px 20px rgba(0,120,215,.35)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-line{background:transparent;color:var(--c-blue);border:1.5px solid var(--c-blue)}
.btn-line:hover{background:var(--c-blue);color:#fff}

/* ---------------- 首屏 Hero ---------------- */
.hero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(135deg,#0078D7 0%,#005A9E 55%,#0F4C81 100%)}
.hero::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(124deg,rgba(255,255,255,.05) 0 2px,transparent 2px 28px);pointer-events:none}
.hero::after{content:"";position:absolute;right:-6%;top:-20%;width:46%;height:140%;background:radial-gradient(circle,rgba(255,255,255,.10),transparent 60%);pointer-events:none}
.hero-inner{position:relative;display:flex;align-items:center;gap:46px;min-height:460px;padding:64px 20px}
.hero-text{flex:1.1}
.hero .eyebrow{display:inline-block;font-size:13px;letter-spacing:.16em;text-transform:uppercase;background:rgba(255,255,255,.14);padding:6px 14px;border-radius:30px;margin-bottom:18px}
.hero h1{font-size:42px;font-weight:700;line-height:1.28;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.18)}
.hero .sub{font-size:18px;opacity:.94;margin-bottom:26px;max-width:560px}
.hero-feat{display:flex;flex-wrap:wrap;gap:12px 28px;margin-bottom:32px}
.hero-feat li{display:flex;align-items:center;gap:8px;font-size:15px}
.hero-feat .star{color:#8fd6ff;font-size:14px}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-media{flex:.9;display:flex;justify-content:center;align-items:center}
.hero-media .device{width:330px;height:330px;border-radius:18px;background:linear-gradient(160deg,rgba(255,255,255,.16),rgba(255,255,255,.04));border:1px solid rgba(255,255,255,.22);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:14px;box-shadow:0 24px 50px rgba(0,0,0,.28)}
.hero-media .device .screen{width:210px;height:150px;border-radius:8px;background:radial-gradient(circle at 50% 30%,#1a3a5c,#0a1a2c);border:1px solid rgba(255,255,255,.25);display:flex;align-items:flex-end;justify-content:center;padding-bottom:10px}
.hero-media .device .screen .temp{color:#7fe0ff;font-size:30px;font-weight:700;font-family:Arial}
.hero-media .device .label{color:#fff;font-size:15px;letter-spacing:1px}
.tag-hot{position:absolute;right:26px;top:26px;background:var(--c-red);color:#fff;font-size:13px;writing-mode:vertical-rl;letter-spacing:4px;padding:16px 7px;border-radius:4px;box-shadow:0 8px 22px rgba(196,30,58,.42)}

/* ---------------- 口号区 Slogan ---------------- */
.slogan{position:relative;background:linear-gradient(160deg,#1B2838,#0F1923);color:#fff;text-align:center;padding:74px 20px;overflow:hidden}
.slogan .map{position:absolute;inset:0;background:radial-gradient(circle at 50% 58%,rgba(196,30,58,.20),transparent 62%);pointer-events:none}
.slogan .dots{position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);background-size:26px 26px;opacity:.5;pointer-events:none}
.slogan .wrap{position:relative;max-width:820px;margin:0 auto}
.slogan h2{font-size:31px;font-weight:600;letter-spacing:2px}
.slogan .en{font-size:17px;letter-spacing:.14em;text-transform:uppercase;color:#9fc4e8;margin:12px 0 18px;font-weight:700}
.slogan p{font-size:15px;color:rgba(255,255,255,.82);line-height:1.9}
.slogan .pin{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;color:#ffb3b3}

/* ---------------- 区块通用 ---------------- */
.sec{padding:72px 0}
.sec-alt{background:var(--c-alt)}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head .cn{font-size:28px;font-weight:700;color:var(--c-ink);position:relative;display:inline-block;padding-bottom:14px}
.sec-head .cn::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:48px;height:3px;background:var(--c-blue);border-radius:2px}
.sec-head .en{font-size:14px;letter-spacing:.18em;text-transform:uppercase;color:var(--c-blue);margin-top:14px;font-weight:600}
.sec-head.left{text-align:left}
.sec-head.left .cn::after{left:0;transform:none}

/* ---------------- 主推产品 Feature ---------------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center;background:#fff;border:1px solid var(--c-border);border-radius:14px;overflow:visible;box-shadow:var(--shadow)}
.feature > *{min-width:0}
.feature .pic{background:var(--c-alt);min-height:320px;display:flex;align-items:center;justify-content:center;padding:30px}
.feature .pic img{max-height:300px;border-radius:8px}
.feature .body{padding:8px 40px 8px 8px;max-width:100%;overflow-wrap:break-word;min-width:0}
.feature .badge{display:inline-block;background:var(--c-red);color:#fff;font-size:12px;padding:4px 12px;border-radius:3px;margin-bottom:14px;letter-spacing:1px}
.feature h3{font-size:27px;color:var(--c-ink);margin-bottom:6px}
.feature .model{color:var(--c-blue);font-size:15px;font-weight:600;margin-bottom:16px;word-break:break-word}
.feature p{color:var(--c-muted);margin-bottom:18px;word-break:break-word}
.feature ul.spec{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;margin-bottom:24px}
.feature ul.spec li{font-size:14px;color:#444;display:flex;gap:8px}
.feature ul.spec li::before{content:"▸";color:var(--c-blue)}
.feature .placeholder{background:repeating-linear-gradient(45deg,#eef3f9,#eef3f9 10px,#e6edf5 10px,#e6edf5 20px);border:1px dashed var(--c-blue-l);border-radius:8px;padding:18px;color:var(--c-blue-d);font-size:14px;margin-bottom:18px}

/* ---------------- 产品卡片网格 ---------------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h);border-color:#cfe0f0}
.card .pic{aspect-ratio:4/3;overflow:hidden;background:var(--c-alt)}
.card .pic img{width:100%;height:100%;object-fit:cover;transition:.45s}
.card:hover .pic img{transform:scale(1.06)}
.card .body{padding:18px 18px 22px}
.card h3{font-size:17px;margin-bottom:8px;color:var(--c-ink)}
.card p{font-size:13.5px;color:var(--c-muted);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .more{display:inline-block;margin-top:12px;color:var(--c-blue);font-size:13px;font-weight:600}
.card .more:hover{color:var(--c-blue-d)}
.card .tag-legacy{position:absolute;top:12px;right:12px;background:var(--c-muted);color:#fff;font-size:11px;padding:3px 8px;border-radius:3px}

/* 系列卡片 */
.series-card{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);padding:30px 26px;text-align:center;box-shadow:var(--shadow);transition:.25s}
.series-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-h);border-color:#cfe0f0}
.series-card .ico{width:60px;height:60px;margin:0 auto 16px;border-radius:50%;background:linear-gradient(135deg,#0078D7,#005A9E);display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;font-weight:700}
.series-card h3{font-size:18px;color:var(--c-ink);margin-bottom:8px}
.series-card p{font-size:13px;color:var(--c-muted)}

/* ---------------- 优势 ---------------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv{text-align:center;padding:34px 18px;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);transition:.25s}
.adv:hover{transform:translateY(-5px);box-shadow:var(--shadow-h)}
.adv .ico{width:64px;height:64px;margin:0 auto 18px;border-radius:14px;background:var(--c-alt);display:flex;align-items:center;justify-content:center;color:var(--c-blue);font-size:28px}
.adv h3{font-size:17px;color:var(--c-ink);margin-bottom:8px}
.adv p{font-size:13.5px;color:var(--c-muted);line-height:1.65}

/* ---------------- 关于我们预览 ---------------- */
.about-row{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.about-row p{color:var(--c-muted);margin-bottom:14px}
.about-row .stats{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:24px}
.about-row .stat{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow)}
.about-row .stat b{display:block;font-size:30px;color:var(--c-blue);font-family:Arial}
.about-row .stat span{font-size:13px;color:var(--c-muted)}

/* ---------------- 服务/视频 ---------------- */
.vid-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.vid{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s;display:flex}
.vid:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.vid .thumb{flex:0 0 200px;background:linear-gradient(135deg,#0F4C81,#0078D7);display:flex;align-items:center;justify-content:center;color:#fff;font-size:40px}
.vid .body{padding:18px 22px}
.vid h3{font-size:16px;color:var(--c-ink);margin-bottom:8px}
.vid p{font-size:13px;color:var(--c-muted)}
.vid .play{display:inline-block;margin-top:10px;color:var(--c-blue);font-size:13px;font-weight:600}

/* ---------------- 联系 ---------------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info .item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--c-border)}
.contact-info .item .ico{width:44px;height:44px;flex-shrink:0;border-radius:10px;background:var(--c-alt);display:flex;align-items:center;justify-content:center;color:var(--c-blue);font-size:20px}
.contact-info .item h4{font-size:14px;color:var(--c-muted);margin-bottom:4px;font-weight:500}
.contact-info .item p{font-size:16px;color:var(--c-ink);font-weight:600}
.contact-form{background:#fff;border:1px solid var(--c-border);border-radius:14px;padding:30px;box-shadow:var(--shadow)}
.contact-form .field{margin-bottom:18px}
.contact-form label{display:block;font-size:14px;color:#555;margin-bottom:6px}
.contact-form input,.contact-form textarea{width:100%;padding:11px 14px;border:1px solid var(--c-border);border-radius:6px;font-family:inherit;font-size:14px;background:#fbfcfe}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--c-blue);box-shadow:0 0 0 3px rgba(0,120,215,.12)}

/* CTA 条 */
.cta{background:linear-gradient(120deg,#005A9E,#0078D7);color:#fff;text-align:center;padding:62px 20px}
.cta h2{font-size:28px;margin-bottom:12px}
.cta p{opacity:.92;margin-bottom:26px}

/* ---------------- 页脚 Footer ---------------- */
.footer{background:#0F1923;color:rgba(255,255,255,.66);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:42px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer li{margin-bottom:10px;font-size:14px}
.footer a:hover{color:#fff}
.footer .brand-name{font-size:19px;color:#fff;font-weight:700;margin-bottom:14px;letter-spacing:1px}
.footer .qline{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.55)}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:#fff}

/* ---------------- 面包屑 + 内页 banner ---------------- */
.crumb{background:var(--c-alt);padding:16px 0;font-size:13px;color:var(--c-muted)}
.crumb .sep{margin:0 8px;opacity:.6}
.crumb a:hover{color:var(--c-blue)}
.page-banner{position:relative;background:linear-gradient(135deg,#0F4C81,#0078D7 60%);color:#fff;padding:64px 0;text-align:center;overflow:hidden}
.page-banner::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(124deg,rgba(255,255,255,.05) 0 2px,transparent 2px 28px)}
.page-banner h1{font-size:34px;margin-bottom:8px;position:relative}
.page-banner p{opacity:.88;position:relative}

/* 回到顶部 */
.totop{position:fixed;right:24px;bottom:24px;width:48px;height:48px;background:var(--c-blue);color:#fff;border-radius:8px;display:none;align-items:center;justify-content:center;font-size:22px;box-shadow:var(--shadow-h);cursor:pointer;z-index:900;transition:.2s}
.totop:hover{background:var(--c-blue-d)}
.totop.show{display:flex}

/* 滚入动画 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* 移动端菜单 */
.mobile-menu{position:fixed;inset:0;background:rgba(15,25,35,.97);z-index:1100;display:none;flex-direction:column;padding:80px 28px;gap:4px;overflow:auto}
.mobile-menu.open{display:flex}
.mobile-menu a{color:#fff;font-size:18px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.mobile-menu .m-close{position:absolute;top:20px;right:26px;color:#fff;font-size:30px;cursor:pointer;line-height:1}

/* ---------------- 产品亮点 Highlights ---------------- */
.highlights{margin-bottom:24px}
.highlights h4{font-size:16px;color:var(--c-ink);margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid var(--c-blue);display:inline-block}
.highlights ul{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px}
.highlights li{font-size:14px;color:#444;display:flex;align-items:flex-start;gap:8px}
.highlights li::before{content:"";flex-shrink:0;width:6px;height:6px;background:var(--c-blue);border-radius:50%;margin-top:8px}

/* ---------------- 规格参数表 Specs Table ---------------- */
.specs-table{margin-bottom:24px}
.specs-table h4{font-size:16px;color:var(--c-ink);margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid var(--c-blue);display:inline-block}
.specs-table table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--c-border);border-radius:8px;overflow:hidden;font-size:14px}
.specs-table th{background:var(--c-blue);color:#fff;padding:12px 16px;text-align:left;font-weight:600}
.specs-table td{padding:11px 16px;border-bottom:1px solid var(--c-border);color:#444}
.specs-table tr:last-child td{border-bottom:none}
.specs-table tr:hover td{background:var(--c-alt)}
.specs-table td:nth-child(odd){font-weight:600;color:var(--c-ink);background:rgba(0,120,215,.04)}

/* ---------------- 响应式 (≤980px) 平板 ---------------- */
@media(max-width:980px){
  .nav,.header-right{display:none}
  .nav-toggle{display:flex}
  .tag-hot{display:none}
  .hero-inner{flex-direction:column;text-align:center;gap:30px;min-height:auto;padding:54px 20px}
  .hero-media .device{width:auto;max-width:88%;height:auto}
  .hero-media .device .screen{width:100%;max-width:230px}
  .hero .sub{margin-left:auto;margin-right:auto}
  .hero-feat{justify-content:center}
  .grid,.adv-grid{grid-template-columns:repeat(2,1fr)}
  .vid-grid{grid-template-columns:1fr}
  .vid{flex-direction:column}
  .vid .thumb{flex:0 0 auto;height:130px;font-size:34px}
  .feature{grid-template-columns:1fr}
  .feature .body{padding:30px}
  .about-row,.contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:32px}
  /* 移动端下拉菜单 */
  .mobile-menu .dropdown{display:none;max-height:0;overflow:hidden;transition:max-height .3s ease}
  .mobile-menu .dropdown.open{display:block;max-height:500px}
  .mobile-menu .dropdown a{padding:12px 20px 12px 36px;font-size:15px}
  .mobile-menu a.has-dropdown .arrow{display:none}
  .mobile-menu a.has-dropdown::after{content:"▼";font-size:10px;margin-left:auto;opacity:.6}
  .mobile-menu a.has-dropdown.open::after{transform:rotate(180deg)}
}

/* ---------------- 响应式 (≤768px) 手机 ---------------- */
@media(max-width:768px){
  .highlights ul{grid-template-columns:1fr}
  .specs-table{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .specs-table table{font-size:13px;min-width:400px}
  .specs-table th,.specs-table td{padding:8px 10px;white-space:nowrap}
  .feature h3{font-size:22px}
  .feature .model{font-size:14px}
  .feature p{font-size:14px}
  .sec-head .cn{font-size:22px}
  .hero h1{font-size:25px}
  .hero .sub{font-size:15px}
  .hero .eyebrow{font-size:12px}
  .hero-feat li{font-size:13px}
  .btn{padding:10px 22px;font-size:14px}
  .slogan h2{font-size:20px}
  .slogan .en{font-size:14px}
  .slogan p{font-size:14px}
  .cta h2{font-size:22px}
  .cta p{font-size:14px}
  .about-row .stat b{font-size:24px}
  .page-banner h1{font-size:24px}
  .page-banner p{font-size:14px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer{padding:36px 0 0}
  .sec{padding:40px 0}
  .container{padding:0 16px}
  .feature .body{padding:30px 20px}
  .feature .pic{min-height:200px;padding:20px}
  .feature .pic img{max-height:220px}
  .feature h3{font-size:22px;word-break:break-word}
  .feature .model{font-size:14px;word-break:break-all}
  .feature p{font-size:14px;word-break:break-word;overflow-wrap:break-word}
  .highlights ul{gap:10px}
  .highlights li{font-size:13px}
  .specs-table{margin-bottom:20px}
  .card .body{padding:14px 14px 18px}
  .card h3{font-size:16px}
  .card p{font-size:13px}
  .adv{padding:24px 14px}
  .adv .ico{width:50px;height:50px;font-size:24px}
  .adv h3{font-size:15px}
  .adv p{font-size:13px}
  .series-card{padding:24px 18px}
  .vid .body{padding:14px}
  .vid h3{font-size:15px}
  .contact-form{padding:20px}
  .contact-info .item p{font-size:15px}
  .header-inner{height:56px}
  .logo img{height:36px}
  .logo .brand-txt{font-size:17px}
  .mobile-menu{padding:70px 22px}
  .mobile-menu a{font-size:16px;padding:13px 0}
}

/* ---------------- 响应式 (≤560px) 小屏手机 ---------------- */
@media(max-width:560px){
  .grid,.adv-grid{grid-template-columns:1fr}
  .feature ul.spec{grid-template-columns:1fr}
  .hero h1{font-size:22px}
  .slogan h2{font-size:18px}
  .sec{padding:36px 0}
  .page-banner h1{font-size:22px}
  .feature h3{font-size:20px}
  .sec-head .cn{font-size:20px}
  .vs-grid{grid-template-columns:repeat(2,1fr)}
  .vl-list{grid-template-columns:1fr}
}

/* ---------------- 操作视频库（三级：系列入口 → 视频列表 → 弹层播放） ---------------- */
.vid-intro{color:var(--c-muted);font-size:14px;margin:-4px 0 22px;max-width:820px}
.vid-intro b{color:var(--c-text)}
.vs-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.vs-card{display:flex;flex-direction:column;align-items:center;gap:8px;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);padding:26px 14px;cursor:pointer;transition:all .2s;font-family:inherit;color:var(--c-text);box-shadow:var(--shadow)}
.vs-card:hover{border-color:var(--c-blue);transform:translateY(-3px)}
.vs-play{width:52px;height:52px;border-radius:50%;background:var(--c-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;transition:all .2s}
.vs-card:hover .vs-play{background:var(--c-red)}
.vs-name{font-size:16px;font-weight:700}
.vs-count{font-size:13px;color:var(--c-muted)}
.vl-back{display:inline-block;border:1px solid var(--c-border);background:#fff;color:var(--c-blue);padding:8px 18px;border-radius:999px;font-size:14px;font-family:inherit;cursor:pointer;margin-bottom:14px;transition:all .2s}
.vl-back:hover{border-color:var(--c-blue);background:var(--c-alt)}
.vl-subnav{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 16px}
.vl-sub{flex:1 1 auto;min-width:150px;max-width:220px;padding:10px 14px;border:1px solid var(--c-border);border-radius:var(--radius);background:#fff;color:var(--c-text);font-size:14px;font-weight:600;font-family:inherit;cursor:pointer;text-align:center;transition:all .2s}
.vl-sub:hover{border-color:var(--c-blue);color:var(--c-blue)}
.vl-sub.active{background:var(--c-blue);border-color:var(--c-blue);color:#fff}
.vl-title{font-size:18px;margin:6px 0 16px}
.vl-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.vl-item{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);padding:12px 14px;text-align:left;cursor:pointer;transition:all .2s;font-size:14px;font-family:inherit;color:var(--c-text);line-height:1.5}
.vl-item:hover{border-color:var(--c-blue);box-shadow:var(--shadow);transform:translateY(-1px)}
.vl-num{flex:0 0 auto;min-width:24px;height:24px;border-radius:50%;background:var(--c-alt);color:var(--c-blue);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;transition:all .2s}
.vl-item:hover .vl-num{background:var(--c-blue);color:#fff}
.vl-t{flex:1 1 auto;word-break:break-word}
.vl-go{flex:0 0 auto;font-size:12px;color:var(--c-blue)}
.vid-tip{margin-top:18px;font-size:13px;color:#999}
.vid-tip a{color:var(--c-blue)}
.vid-tip a:hover{text-decoration:underline}

/* ---------------- 视频播放弹层 ---------------- */
.v-modal{position:fixed;left:0;top:0;right:0;bottom:0;z-index:2000;display:none;align-items:center;justify-content:center;padding:16px}
.v-modal.open{display:flex}
.v-mask{position:absolute;left:0;top:0;right:0;bottom:0;background:rgba(8,15,25,.84)}
.v-panel{position:relative;width:100%;max-width:860px;background:#0b1520;border-radius:12px;padding:14px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.v-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.v-title{color:#fff;font-size:15px;font-weight:600;word-break:break-word}
.v-close{flex:0 0 auto;border:none;background:rgba(255,255,255,.14);color:#fff;padding:7px 14px;border-radius:999px;font-size:13px;font-family:inherit;cursor:pointer;transition:background .2s}
.v-close:hover{background:var(--c-red)}
.v-player{border-radius:8px;overflow:hidden;background:#000}
.v-player video{display:block;width:100%;max-height:72vh;background:#000}
.v-direct{display:inline-block;margin-top:10px;font-size:13px;color:#8ec2f0}
.v-direct:hover{color:#fff;text-decoration:underline}

/* 视频库平板断点 */
@media(max-width:900px){
  .vs-grid{grid-template-columns:repeat(2,1fr)}
}

/* ---------------- 产品页图集（X1000-2T 上架图） ---------------- */
.pro-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pro-g{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;margin:0;transition:all .2s}
.pro-g:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.pro-g img{width:100%;height:auto;display:block;cursor:zoom-in}
.pro-g figcaption{padding:10px;font-size:13px;color:var(--c-muted);text-align:center}
.pro-banner{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden}
.pro-banner img{width:100%;height:auto;display:block;cursor:zoom-in}
.fn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.fn-item{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;margin:0;transition:all .2s}
.fn-item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.fn-item img{width:100%;height:auto;display:block;cursor:zoom-in}
.fn-item figcaption{padding:9px;font-size:13px;color:var(--c-muted);text-align:center}
/* 图片放大弹层 */
.lb{position:fixed;left:0;top:0;right:0;bottom:0;z-index:3000;background:rgba(8,15,25,.9);display:none;align-items:center;justify-content:center;padding:20px}
.lb.open{display:flex}
.lb img{max-width:94%;max-height:92%;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
@media(max-width:900px){
  .pro-gallery{grid-template-columns:repeat(2,1fr)}
  .fn-grid{grid-template-columns:1fr}
}

/* ---------------- 产品中心 · 型号选择栏 ---------------- */
.model-bar{background:#fff;border-bottom:1px solid var(--c-border);padding:16px 0 6px}
.model-nav{display:flex;flex-wrap:wrap;gap:10px}
.model-item{flex:1 1 auto;min-width:160px;max-width:220px;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);padding:8px 12px;cursor:pointer;font-family:inherit;font-size:14px;font-weight:600;color:var(--c-text);transition:all .2s;text-align:left}
.model-item img{width:44px;height:44px;object-fit:contain;border-radius:6px;background:#f5f7fa;border:1px solid var(--c-border)}
.model-item .m-ico{flex:0 0 auto;width:44px;height:44px;border-radius:6px;background:linear-gradient(135deg,#1e5eff,#16306b);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}
.model-item:hover{border-color:var(--c-blue);color:var(--c-blue)}
.model-item.active{border-color:var(--c-blue);background:#eef3ff;color:var(--c-blue);box-shadow:0 2px 8px rgba(30,94,255,.15)}
@media(max-width:640px){
  .model-item{min-width:calc(50% - 5px);max-width:none;font-size:13px}
  .model-item img,.model-item .m-ico{width:38px;height:38px}
}