:root{
  --ink:#0b1526; --ink2:#12203a; --paper:#f6f8fa; --card:#ffffff;
  --green:#7fb53a; --magenta:#d6338a; --txt:#2b3442; --mut:#64748b;
  --line:#e2e8f0; --grad:linear-gradient(120deg,#7fb53a,#3aa07a 45%,#d6338a);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;color:var(--txt);background:var(--paper);font-size:15.5px;line-height:1.85}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1360px;margin:0 auto;padding:0 28px}
h1,h2,h3{font-family:"Noto Serif SC","Source Han Serif SC","SimSun",serif;color:var(--ink);font-weight:700}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header.stuck{box-shadow:0 6px 24px rgba(11,21,38,.08)}
.header-inner{display:flex;align-items:center;gap:12px;height:78px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-seal{width:56px;height:56px;background:#fff;border:1px solid var(--line);border-radius:11px;overflow:hidden;display:flex;align-items:center;justify-content:center;flex:none}
.brand-seal img{width:70%;height:82%;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:25px;letter-spacing:.025em;color:var(--ink);font-family:"Noto Serif SC","SimSun",serif;white-space:nowrap}
.brand-text span{font-size:10px;letter-spacing:.14em;color:var(--mut);white-space:nowrap}
.nav{display:flex;gap:0;margin-left:auto}
.nav a{padding:8px 8px;font-size:14.5px;color:var(--txt);border-radius:8px;white-space:nowrap;position:relative}
.nav a:hover{background:#eef2f7;color:var(--ink)}
.nav a.on{color:var(--ink);font-weight:600}
.nav a.on::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--grad);border-radius:2px}
.header-tel{display:flex;align-items:center;gap:7px;color:var(--ink);font-weight:700;font-size:15px;white-space:nowrap;padding:8px 14px;border:1px solid var(--ink);border-radius:999px}
.header-tel:hover{background:var(--ink);color:#fff}
.nav-toggle{display:none}

/* hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,#1c2f52 0%,var(--ink) 55%);color:#eaf0f8;position:relative;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding-top:92px;padding-bottom:110px}
.hero-tag{font-size:12px;letter-spacing:.3em;color:#9fb2cd;margin-bottom:18px}
.hero-copy h1{font-size:38px;line-height:1.42;color:#fff;margin-bottom:22px}
.hero-sub{color:#b9c6da;font-size:15.5px;margin-bottom:34px;max-width:560px}
.hero-btns{display:flex;gap:14px}
.btn{display:inline-block;padding:13px 30px;border-radius:999px;font-weight:600;font-size:15px;transition:.25s}
.btn.solid{background:var(--grad);color:#fff}
.btn.solid:hover{filter:brightness(1.08);transform:translateY(-2px)}
.btn.ghost{border:1px solid rgba(255,255,255,.4);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.hero-frame{position:relative}
.hero-frame img{border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.hero-seal{position:absolute;left:-28px;bottom:-28px;width:104px;height:104px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;text-align:center;font-size:19px;font-weight:700;line-height:1.3;letter-spacing:.12em;font-family:"Noto Serif SC","SimSun",serif;box-shadow:0 14px 34px rgba(214,51,138,.35);border:5px solid rgba(255,255,255,.85)}
.hero-stripe{height:5px;background:var(--grad)}

/* stats */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);padding-top:34px;padding-bottom:34px}
.stat{text-align:center;position:relative}
.stat+.stat::before{content:"";position:absolute;left:0;top:12%;bottom:12%;width:1px;background:var(--line)}
.stat b{display:block;font-size:44px;font-family:Georgia,serif;color:var(--ink);line-height:1.1}
.stat>span{display:block;font-size:13px;color:var(--mut);margin-top:6px}

/* sections */
.sec{padding:88px 0}
.sec.alt{background:#eef2f6}
.sec-head{max-width:760px;margin:0 auto 46px;text-align:center}
.eyebrow{font-size:12px;letter-spacing:.32em;color:var(--magenta);margin-bottom:10px;font-weight:700}
.sec-head h2{font-size:30px;margin-bottom:14px}
.sec-head p{color:var(--mut)}
.center-link{text-align:center;margin-top:34px}
.center-link a{color:var(--ink);font-weight:600;border-bottom:2px solid var(--green);padding-bottom:3px}

/* product cards */
.pcards{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-6px);box-shadow:0 22px 48px rgba(11,21,38,.12);border-color:transparent}
.pcard-img{overflow:hidden;background:#f2f4f7}
.pcard-img img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:.5s}
.pcard:hover .pcard-img img{transform:scale(1.05)}
.pcard-body{padding:22px 24px 24px}
.pcard-body h3{font-size:20px;margin-bottom:8px}
.pcard-body p{font-size:14px;color:var(--mut);margin-bottom:14px}
.more{font-size:13px;font-weight:600;color:var(--magenta)}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-img img{border-radius:16px;box-shadow:0 24px 56px rgba(11,21,38,.16)}
.split-copy h2{font-size:30px;margin-bottom:16px}
.split-copy>p{color:var(--mut);margin-bottom:18px}
.ticks{list-style:none;margin:0 0 26px}
.ticks li{padding:9px 0 9px 30px;position:relative}
.ticks li::before{content:"✓";position:absolute;left:0;top:9px;width:20px;height:20px;border-radius:50%;background:var(--grad);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center}
.split-copy .btn{margin-top:6px}

/* scenes */
.scards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.scard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px 26px;transition:.3s}
.scard:hover{box-shadow:0 16px 40px rgba(11,21,38,.1);transform:translateY(-4px)}
.scard h3{font-size:19px;margin-bottom:10px}
.scard p{font-size:14px;color:var(--mut)}

/* page head */
.page-head{background:radial-gradient(900px 400px at 15% -20%,#1c2f52 0%,var(--ink) 60%);color:#dfe7f2;padding:72px 0 58px;position:relative;overflow:hidden}
.page-head h1{font-size:32px;color:#fff;margin-bottom:10px}
.page-head p{color:#9fb2cd}
.crumb{margin-top:22px;font-size:13px;color:#7e91ad}
.crumb a{color:#b9c6da}
.crumb span{margin:0 8px}
.vertical{position:absolute;right:30px;top:34px;writing-mode:vertical-rl;letter-spacing:.5em;font-size:20px;color:rgba(255,255,255,.14);font-family:"Noto Serif SC","SimSun",serif}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:26px}
.gitem{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;cursor:zoom-in}
.gitem img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:.5s}
.gitem:hover img{transform:scale(1.04)}
.gitem figcaption{padding:14px 18px;font-size:14px;color:var(--txt);text-align:center}

/* article */
.article{max-width:960px}
.article h2{font-size:26px;margin:38px 0 16px}
.article h2:first-child{margin-top:0}
.article p{margin-bottom:16px;color:#3a4557}
.article-img{border-radius:14px;margin:26px 0}
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:10px}
.why{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px}
.why b{font-family:Georgia,serif;font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.why h3{font-size:18px;margin:8px 0 8px}
.why p{font-size:14px;color:var(--mut);margin:0}

/* steps / faq */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px 24px;position:relative}
.step b{display:inline-flex;width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;align-items:center;justify-content:center;font-family:Georgia,serif;font-size:20px;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--mut)}
.faqs{max-width:900px;margin:0 auto}
.faq{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;padding:0 22px}
.faq summary{cursor:pointer;padding:18px 0;font-weight:600;color:var(--ink);list-style:none;position:relative}
.faq summary::after{content:"+";position:absolute;right:2px;top:16px;font-size:20px;color:var(--magenta)}
.faq[open] summary::after{content:"–"}
.faq p{padding:0 0 18px;color:var(--mut);font-size:14.5px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.contact-copy h2,.contact-form h2{font-size:26px;margin-bottom:14px}
.contact-copy>p{color:var(--mut);margin-bottom:20px}
.contact-list{list-style:none}
.contact-list li{padding:13px 0;border-bottom:1px dashed var(--line);display:flex;gap:16px;font-size:15px}
.contact-list b{flex:none;width:52px;color:var(--mut);font-weight:400;font-size:13px;padding-top:2px}
.contact-list a{font-weight:700;color:var(--ink);font-size:18px}
.qr-box{display:flex;align-items:center;gap:18px;margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;width:fit-content}
.qr-box img{width:110px;height:auto;border-radius:8px}
.qr-box p{font-size:13px;color:var(--mut);line-height:1.7}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px}
.contact-form label{display:block;font-size:14px;color:var(--ink);font-weight:600;margin-bottom:16px}
.contact-form input,.contact-form textarea{width:100%;margin-top:8px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:var(--paper);color:var(--txt)}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--green)}
.form-tip{font-size:13px;color:var(--mut);margin-top:12px}

/* cta */
.cta-band{background:radial-gradient(1000px 420px at 85% 120%,#1c2f52 0%,var(--ink) 60%);color:#fff;padding:66px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px}
.cta-inner h2{color:#fff;font-size:26px;margin-bottom:10px}
.cta-inner p{color:#9fb2cd;max-width:620px}
.cta-tel{display:block;text-align:right;font-size:34px;font-weight:700;color:#fff;font-family:Georgia,serif;border-left:1px solid rgba(255,255,255,.25);padding-left:36px}
.cta-tel small{display:block;font-size:12px;letter-spacing:.3em;color:#9fb2cd;margin-bottom:4px;font-family:inherit}

/* footer */
.site-footer{background:#070f1c;color:#8fa0b8;padding:70px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:48px;padding-bottom:44px}
.footer-brand .brand-text strong{color:#fff;font-size:22px}
.footer-brand .brand-text span{color:#6c7f99}
.footer-brand p{font-size:13.5px;margin-top:18px;line-height:2}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;font-family:inherit}
.footer-col ul{list-style:none}
.footer-col li{padding:5px 0;font-size:14px}
.footer-col a:hover{color:#fff}
.footer-kw{border-top:1px solid #16243c;padding:24px 0;font-size:12.5px;line-height:2.4}
.footer-kw a{margin-right:18px;color:#647ba0}
.footer-kw a:hover{color:#fff}
.footer-bottom{border-top:1px solid #16243c;padding:20px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:13px;color:#5d7089}
.footer-bottom a:hover{color:#fff}

/* reveal */
.nm-short{display:none}
.callbar{display:none}
@media(max-width:860px){
  .stats{margin-top:26px}
  body{padding-bottom:56px}
  .callbar{position:fixed;left:0;right:0;bottom:0;z-index:80;height:56px;display:flex;align-items:center;justify-content:center;gap:10px;background:var(--grad);color:#fff;font-size:17px;font-weight:700;letter-spacing:.04em;box-shadow:0 -8px 24px rgba(11,21,38,.22)}
  .callbar b{font-family:Georgia,serif;font-size:19px;letter-spacing:.06em}
  .callbar:active{filter:brightness(1.1)}
}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* lightbox */
.lightbox{position:fixed;inset:0;background:rgba(5,10,20,.9);z-index:99;display:none;align-items:center;justify-content:center;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img{max-width:88vw;max-height:86vh;border-radius:10px}

/* responsive */
@media(max-width:1500px){.brand-text span{display:none}}
@media(max-width:1340px){
  .nav a{padding:8px 7px;font-size:14px}
  .header-inner{gap:12px}
  .brand-text strong{font-size:20px}
  .brand-seal{width:48px;height:48px}
  .header-tel{padding:8px 12px;font-size:14.5px}
  .scards,.steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:1080px){
  .hero-inner{grid-template-columns:1fr;padding-top:64px;padding-bottom:70px}
  .hero-copy h1{font-size:30px}
  .hero-frame{max-width:640px}
  .pcards{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:34px}
  .contact-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:22px 0}
  .stat:nth-child(3)::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav-toggle{display:flex;flex-direction:column;gap:5px;background:none;border:none;margin-left:auto;cursor:pointer;padding:8px}
  .nav-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
  .nav{position:fixed;inset:78px 0 auto 0;background:#fff;flex-direction:column;padding:14px 24px 24px;gap:2px;border-bottom:1px solid var(--line);box-shadow:0 24px 40px rgba(11,21,38,.14);transform:translateY(-130%);transition:.35s;z-index:49}
  .nav.open{transform:none}
  .nav a{padding:12px 6px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav a.on::after{display:none}
  .header-tel{margin-left:0}
  .header-inner{height:66px}
  .nav-toggle{margin-left:auto}
  .header-tel{display:none}
  .sec{padding:62px 0}
  .sec-head h2{font-size:24px}
  .page-head h1{font-size:25px}
  .cta-inner{flex-direction:column;text-align:left}
  .cta-tel{text-align:left;border-left:none;padding-left:0;border-top:1px solid rgba(255,255,255,.25);padding-top:16px;font-size:28px}
  .why-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .vertical{display:none}
}
@media(max-width:620px){
  .brand-seal{width:46px;height:46px}
  .nm-full{display:none}
  .nm-short{display:inline;font-size:22px;letter-spacing:.02em}
  .pcards{grid-template-columns:1fr}
  .scards,.steps{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat b{font-size:34px}
  .hero-copy h1{font-size:24px}
  .hero-seal{width:84px;height:84px;font-size:15px;left:-10px;bottom:-20px}
  .wrap{padding:0 18px}
  .contact-form{padding:24px}
}