*{margin:0;padding:0;box-sizing:border-box}
:root{
--x7k-primary:#0f2c4d;
--x7k-accent:#14b8a6;
--x7k-accent-dark:#0d9488;
--x7k-bg:#f6f8fb;
--x7k-text:#23303f;
--x7k-muted:#6b7a8c;
--x7k-border:#e6ecf2;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--x7k-text);background:#fff;line-height:1.7;font-size:15px}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--x7k-accent)}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

.x7k-topbar{background:var(--x7k-primary);color:#cfe3f5;font-size:13px;padding:7px 0}
.x7k-topbar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.x7k-topbar a{color:#fff}
.x7k-topbar .x7k-hot{color:#ffd166;font-weight:600;letter-spacing:.5px}

.x7k-header{background:#fff;position:sticky;top:0;z-index:100;box-shadow:0 1px 0 var(--x7k-border)}
.x7k-nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:20px}
.x7k-logo img{height:52px;width:auto}
.x7k-menu{display:flex;list-style:none;gap:28px;align-items:flex-start;flex-wrap:wrap}
.x7k-menu>li{position:relative}
.x7k-menu>li>a{padding:8px 2px;font-weight:500;font-size:15.5px;color:var(--x7k-text)}
.x7k-menu>li>a:hover,.x7k-menu>li.x7k-on>a{color:var(--x7k-accent-dark)}
.x7k-menu>li.x7k-on>a::after{content:"";display:block;height:2px;background:var(--x7k-accent);margin-top:4px;border-radius:2px}
.x7k-sub{position:absolute;top:100%;left:0;background:#fff;min-width:180px;list-style:none;box-shadow:0 10px 30px rgba(15,44,77,.12);border-radius:6px;padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s}
.x7k-menu>li:hover .x7k-sub{opacity:1;visibility:visible;transform:translateY(0)}
.x7k-sub a{display:block;padding:9px 18px;font-size:14px;color:var(--x7k-text)}
.x7k-sub a:hover{background:var(--x7k-bg);color:var(--x7k-accent-dark)}
.x7k-cta{background:var(--x7k-accent);color:#fff;padding:10px 22px;border-radius:24px;font-weight:600;font-size:14px;white-space:nowrap}
.x7k-cta:hover{background:var(--x7k-accent-dark);color:#fff}
.x7k-burger{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--x7k-primary)}

.x7k-hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#0f2c4d 0%,#14406b 60%,#0d9488 130%)}
.x7k-hero img{width:100%;height:560px;object-fit:cover;opacity:.35}
.x7k-hero-inner{position:absolute;inset:0;display:flex;align-items:center}
.x7k-hero-box{max-width:620px;color:#fff;padding:0 20px}
.x7k-hero-tag{display:inline-block;background:rgba(20,184,166,.2);border:1px solid rgba(255,255,255,.25);padding:5px 14px;border-radius:20px;font-size:13px;letter-spacing:1px;margin-bottom:18px}
.x7k-hero h1{font-size:44px;line-height:1.25;margin-bottom:18px;font-weight:700}
.x7k-hero p{font-size:17px;color:#d8e6f3;margin-bottom:28px;line-height:1.8}
.x7k-hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.x7k-btn{display:inline-block;padding:13px 30px;border-radius:28px;font-weight:600;font-size:15px}
.x7k-btn-primary{background:var(--x7k-accent);color:#fff}
.x7k-btn-primary:hover{background:#0ea5a0;color:#fff}
.x7k-btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.x7k-btn-ghost:hover{background:#fff;color:var(--x7k-primary)}

.x7k-sec{padding:70px 0}
.x7k-sec.alt{background:var(--x7k-bg)}
.x7k-sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.x7k-sec-head .x7k-kicker{color:var(--x7k-accent-dark);font-weight:600;letter-spacing:2px;font-size:13px;text-transform:uppercase}
.x7k-sec-head h2{font-size:32px;color:var(--x7k-primary);margin:10px 0 12px;font-weight:700}
.x7k-sec-head p{color:var(--x7k-muted)}

.x7k-feat{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.x7k-feat-card{background:#fff;border:1px solid var(--x7k-border);border-radius:10px;padding:28px 22px;text-align:center;transition:.25s}
.x7k-feat-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(15,44,77,.08);border-color:var(--x7k-accent)}
.x7k-feat-ic{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#e6fffa,#ccfbf1);display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:26px}
.x7k-feat-card h3{font-size:17px;color:var(--x7k-primary);margin-bottom:8px}
.x7k-feat-card p{font-size:13.5px;color:var(--x7k-muted);line-height:1.7}

.x7k-prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.x7k-prod{background:#fff;border:1px solid var(--x7k-border);border-radius:10px;overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.x7k-prod:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(15,44,77,.1);border-color:var(--x7k-accent)}
.x7k-prod-img{aspect-ratio:1/1;background:#f1f5f9;overflow:hidden;display:flex;align-items:center;justify-content:center}
.x7k-prod-img img{width:100%;height:100%;object-fit:cover;transition:.35s}
.x7k-prod:hover .x7k-prod-img img{transform:scale(1.05)}
.x7k-prod-body{padding:18px 18px 22px;display:flex;flex-direction:column;flex:1}
.x7k-prod-cat{font-size:12px;color:var(--x7k-accent-dark);font-weight:600;letter-spacing:1px}
.x7k-prod-body h3{font-size:16.5px;color:var(--x7k-primary);margin:6px 0 8px}
.x7k-prod-body p{font-size:13.5px;color:var(--x7k-muted);flex:1;margin-bottom:12px}
.x7k-prod-more{font-size:13.5px;color:var(--x7k-accent-dark);font-weight:600}

.x7k-why{background:linear-gradient(135deg,#0f2c4d,#14406b);color:#fff}
.x7k-why .x7k-sec-head h2{color:#fff}
.x7k-why .x7k-sec-head p{color:#b8cee4}
.x7k-why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.x7k-why-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:26px 22px}
.x7k-why-card .x7k-num{font-size:28px;font-weight:700;color:var(--x7k-accent);margin-bottom:10px}
.x7k-why-card h3{font-size:17px;margin-bottom:8px}
.x7k-why-card p{font-size:13.5px;color:#c5d8ea;line-height:1.7}

.x7k-news{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.x7k-news-card{background:#fff;border:1px solid var(--x7k-border);border-radius:10px;overflow:hidden;transition:.25s}
.x7k-news-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(15,44,77,.08)}
.x7k-news-img{aspect-ratio:16/10;overflow:hidden}
.x7k-news-img img{width:100%;height:100%;object-fit:cover}
.x7k-news-body{padding:20px}
.x7k-news-date{font-size:12.5px;color:var(--x7k-accent-dark);letter-spacing:1px}
.x7k-news-body h3{font-size:16.5px;color:var(--x7k-primary);margin:8px 0 10px;line-height:1.5}
.x7k-news-body p{font-size:13.5px;color:var(--x7k-muted);line-height:1.7}

.x7k-about{display:grid;grid-template-columns:1.05fr 1fr;gap:50px;align-items:center}
.x7k-about-img{border-radius:12px;overflow:hidden;box-shadow:0 20px 50px rgba(15,44,77,.12)}
.x7k-about h2{font-size:30px;color:var(--x7k-primary);margin-bottom:16px}
.x7k-about p{color:var(--x7k-muted);margin-bottom:14px}
.x7k-about-stats{display:flex;gap:30px;margin-top:22px;flex-wrap:wrap}
.x7k-stat b{display:block;font-size:30px;color:var(--x7k-accent-dark)}
.x7k-stat span{font-size:13px;color:var(--x7k-muted)}

.x7k-cta-band{background:linear-gradient(120deg,#14b8a6,#0d9488);color:#fff;text-align:center;padding:50px 20px;border-radius:14px;margin:20px 0}
.x7k-cta-band h2{font-size:28px;margin-bottom:10px}
.x7k-cta-band p{opacity:.92;margin-bottom:20px}
.x7k-cta-band .x7k-btn{background:#fff;color:var(--x7k-accent-dark)}

.x7k-footer{background:#0a1f38;color:#9db4cc;padding:56px 0 0;margin-top:0}
.x7k-foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px}
.x7k-footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.x7k-footer ul{list-style:none}
.x7k-footer li{margin-bottom:9px;font-size:13.5px}
.x7k-footer a{color:#9db4cc}
.x7k-footer a:hover{color:#fff}
.x7k-foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;text-align:center;font-size:12.5px;color:#6f8aa6}

.x7k-bread{background:var(--x7k-bg);padding:16px 0;font-size:13.5px;color:var(--x7k-muted)}
.x7k-bread a{color:var(--x7k-accent-dark)}
.x7k-page-head{background:linear-gradient(120deg,#0f2c4d,#14406b);color:#fff;padding:56px 0;text-align:center}
.x7k-page-head h1{font-size:34px;margin-bottom:10px}
.x7k-page-head p{color:#b8cee4;max-width:640px;margin:0 auto}

.x7k-detail{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.x7k-detail-img{border:1px solid var(--x7k-border);border-radius:12px;overflow;background:#fff}
.x7k-detail-info h1{font-size:28px;color:var(--x7k-primary);margin-bottom:10px}
.x7k-detail-meta{color:var(--x7k-muted);font-size:14px;margin-bottom:20px}
.x7k-price{color:#e05a4d;font-size:26px;font-weight:700;margin-bottom:20px}
.x7k-spec{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.x7k-spec td{padding:10px 12px;border:1px solid var(--x7k-border)}
.x7k-spec td:first-child{background:var(--x7k-bg);width:36%;color:var(--x7k-primary);font-weight:500}

.x7k-article{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.x7k-article-main{background:#fff;border:1px solid var(--x7k-border);border-radius:10px;padding:36px}
.x7k-article-main h1{font-size:28px;color:var(--x7k-primary);line-height:1.4;margin-bottom:14px}
.x7k-article-meta{font-size:13px;color:var(--x7k-muted);padding-bottom:16px;border-bottom:1px solid var(--x7k-border);margin-bottom:22px}
.x7k-article-main img{border-radius:8px;margin:10px 0 22px;width:100%}
.x7k-article-main p{margin-bottom:16px;color:#3a4a5e;line-height:1.9}
.x7k-article-main h2{font-size:20px;color:var(--x7k-primary);margin:26px 0 12px}
.x7k-side h3{font-size:17px;color:var(--x7k-primary);margin-bottom:14px;padding-left:12px;border-left:3px solid var(--x7k-accent)}
.x7k-side-list{list-style:none}
.x7k-side-list li{padding:10px 0;border-bottom:1px dashed var(--x7k-border);font-size:14px}
.x7k-side-list li a{color:var(--x7k-text)}
.x7k-side-list li a:hover{color:var(--x7k-accent-dark)}

.x7k-contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.x7k-contact-card{background:#fff;border:1px solid var(--x7k-border);border-radius:10px;padding:28px}
.x7k-contact-card h3{color:var(--x7k-primary);margin-bottom:14px;font-size:18px}
.x7k-contact-card p{color:var(--x7k-muted);margin-bottom:8px}

.x7k-404{text-align:center;padding:90px 20px}
.x7k-404 .x7k-code{font-size:120px;font-weight:800;color:var(--x7k-accent);line-height:1}
.x7k-404 h1{font-size:28px;color:var(--x7k-primary);margin:14px 0 10px}
.x7k-404 p{color:var(--x7k-muted);margin-bottom:26px}

@media (max-width:900px){
.x7k-menu{position:fixed;top:0;right:-280px;width:260px;height:100vh;background:#fff;flex-direction:column;padding:80px 24px;gap:18px;box-shadow:-4px 0 20px rgba(0,0,0,.1);transition:right .25s;z-index:200}
.x7k-menu.x7k-open{right:0}
.x7k-burger{display:block;z-index:210}
.x7k-sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;padding-left:12px}
.x7k-hero img{height:480px}
.x7k-hero h1{font-size:30px}
.x7k-feat,.x7k-prod-grid{grid-template-columns:repeat(2,1fr)}
.x7k-why-grid,.x7k-news,.x7k-foot-grid,.x7k-about,.x7k-detail,.x7k-article,.x7k-contact-grid{grid-template-columns:1fr}
.x7k-hero-inner .x7k-hero-box{padding:0 24px}
.x7k-sec{padding:48px 0}
.x7k-sec-head h2{font-size:25px}
.x7k-topbar .x7k-hide-m{display:none}
}
@media (max-width:560px){
.x7k-feat,.x7k-prod-grid{grid-template-columns:1fr}
.x7k-hero h1{font-size:25px}
.x7k-topbar{font-size:12px}
}