:root{
  --ink:#1f2a24; --green:#123f31; --green-d:#0c2e24; --green-l:#eef4f0;
  --gold:#b8912f; --gold-d:#8f6e1f; --gold-l:#f6efd9;
  --red:#8e2b26; --paper:#faf7f0; --line:#e6dfd0; --card:#ffffff;
  --muted:#7c7568;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Serif SC","Songti SC","SimSun",serif;color:var(--ink);
  background:var(--paper);line-height:1.75;font-size:15px;-webkit-text-size-adjust:100%}
.sans{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.wrap{max-width:1100px;margin:0 auto;padding:0 22px}
img{max-width:100%;display:block}
a{color:inherit}

/* topbar */
.topbar{background:var(--green-d);color:#e8dfc8;text-align:center;font-size:12.5px;
  padding:7px 12px;letter-spacing:1px}
.topbar b{color:#d8b45a}

/* nav */
nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
nav .inner{max-width:1100px;margin:0 auto;padding:12px 22px;display:flex;
  align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px}
.seal{width:44px;height:44px;border:2px solid var(--red);border-radius:6px;display:flex;
  align-items:center;justify-content:center;background:#fff;flex-shrink:0}
.seal b{writing-mode:vertical-rl;color:var(--red);font-size:13px;font-weight:900;letter-spacing:2px;line-height:1}
.brand-name{font-size:23px;font-weight:900;letter-spacing:5px;color:var(--green)}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:3px;margin-top:2px}
.navlinks{display:flex;align-items:center;gap:22px}
.navlinks a{color:var(--ink);text-decoration:none;font-size:14px;letter-spacing:1px}
.navlinks a:hover{color:var(--gold-d)}
.btn{background:var(--green);color:#fff;padding:9px 22px;border-radius:2px;font-weight:700;
  text-decoration:none;font-size:14px;display:inline-block;letter-spacing:2px;border:1px solid var(--green)}
.btn.gold{background:var(--gold);border-color:var(--gold)}
.btn.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn.line{background:transparent;color:var(--green);border:1px solid var(--green)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:4px;
  width:42px;height:38px;cursor:pointer;flex-direction:column;justify-content:center;gap:4px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--green);margin:0 auto}

/* hero */
header.hero{background:linear-gradient(120deg,var(--green-d) 0%,var(--green) 60%,#1a5a44 100%);
  color:#fff;padding:78px 20px 96px;position:relative;overflow:hidden}
header.hero:before{content:"禾";position:absolute;right:-40px;bottom:-90px;font-size:420px;
  color:rgba(216,180,90,.08);font-weight:900;line-height:1}
.hero-inner{max-width:1100px;margin:0 auto;position:relative}
.hero .tag{display:inline-block;border:1px solid rgba(216,180,90,.6);color:#d8b45a;
  padding:5px 18px;font-size:13px;letter-spacing:4px;margin-bottom:22px}
.hero h1{font-size:44px;font-weight:900;line-height:1.3;letter-spacing:3px}
.hero h1 em{color:#d8b45a;font-style:normal}
.hero .en{font-size:12px;letter-spacing:6px;color:rgba(255,255,255,.55);margin-top:10px}
.hero p{margin-top:20px;font-size:16.5px;opacity:.92;max-width:640px;letter-spacing:1px}
.hero .cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.hero .rule{margin-top:26px;display:inline-flex;border:1px solid rgba(255,255,255,.3)}
.hero .rule span{padding:8px 18px;font-size:13px;letter-spacing:2px;color:#f0e8d2}
.hero .rule span+span{border-left:1px solid rgba(255,255,255,.3)}

/* metrics */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:-46px 0 0;position:relative;z-index:2;
  background:#fff;border:1px solid var(--line);box-shadow:0 10px 30px rgba(18,63,49,.10)}
.metrics .m{padding:22px 10px;text-align:center;border-right:1px solid var(--line)}
.metrics .m:last-child{border-right:none}
.metrics .m b{display:block;font-size:22px;color:var(--green);font-weight:900;letter-spacing:1px}
.metrics .m span{font-size:12px;color:var(--muted);letter-spacing:2px}

section{padding:56px 0}
.head{text-align:center;margin-bottom:34px}
.head .kicker{display:inline-block;color:var(--gold-d);font-size:12px;letter-spacing:5px;
  border-top:1px solid var(--gold);border-bottom:1px solid var(--gold);padding:4px 14px;margin-bottom:14px}
h2{font-size:27px;font-weight:900;letter-spacing:3px}
.head p{color:var(--muted);margin-top:8px;font-size:14px;letter-spacing:1px}

/* products */
.prods{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.prod{background:var(--card);border:1px solid var(--line);transition:.2s;display:flex;flex-direction:column}
.prod:hover{box-shadow:0 12px 28px rgba(18,63,49,.12);transform:translateY(-3px)}
.prod .img{height:240px;overflow:hidden;background:#f2ede2}
.prod .img img{width:100%;height:100%;object-fit:cover}
.prod .body{padding:20px 22px 22px;border-top:2px solid var(--gold)}
.prod .series{font-size:11px;color:var(--gold-d);letter-spacing:3px;margin-bottom:6px}
.prod h3{font-size:19px;font-weight:900;letter-spacing:2px}
.prod p{font-size:13.5px;color:var(--muted);margin-top:8px}
.prod .tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}
.prod .tags span{font-size:12px;color:var(--green);background:var(--green-l);padding:3px 12px;letter-spacing:1px}

/* specband */
.specband{background:var(--green-d);color:#fff;padding:46px 0}
.specband h2{color:#fff}
.specband .head p{color:rgba(255,255,255,.65)}
.specgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:8px}
.spec{border:1px solid rgba(216,180,90,.4);padding:20px 12px;text-align:center}
.spec b{display:block;font-size:20px;color:#d8b45a;font-weight:900}
.spec span{font-size:12px;color:rgba(255,255,255,.75);letter-spacing:1px}
.spec-note{margin-top:18px;text-align:center;font-size:13px;color:rgba(255,255,255,.6);letter-spacing:2px}

/* price table */
.price-sec{background:var(--paper)}
.pricetable-wrap{overflow-x:auto;margin:0 auto;max-width:880px;-webkit-overflow-scrolling:touch}
.pricetable{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);
  box-shadow:0 10px 30px rgba(18,63,49,.08);min-width:560px}
.pricetable th,.pricetable td{padding:13px 12px;text-align:center;border:1px solid var(--line);font-size:14.5px;white-space:nowrap}
.pricetable thead th{background:var(--green);color:#fff;letter-spacing:1px;font-weight:900;border-color:var(--green-d)}
.pricetable tbody td:first-child{text-align:left;font-weight:900;color:var(--green);background:var(--green-l);white-space:nowrap}
.pricetable tbody tr:nth-child(even) td{background:#fbf9f3}
.pricetable tbody tr:nth-child(even) td:first-child{background:#e9f0ea}
.price-note{max-width:880px;margin:22px auto 0;font-size:13.5px;color:var(--muted);line-height:1.95}
.price-note b{color:var(--green)}
.price-note .pp{margin-top:10px;color:var(--gold-d);font-weight:700}
.value3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px;max-width:880px;margin-left:auto;margin-right:auto}
.value3>div{background:var(--green-l);border:1px solid rgba(184,145,47,.35);border-radius:12px;padding:16px 14px;text-align:center}
.value3 b{display:block;color:var(--gold-d);font-size:15px;margin-bottom:6px;letter-spacing:1px}
.value3 span{font-size:12.5px;color:var(--muted);line-height:1.6}

/* custom */
.custom{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cu{background:#fff;border:1px solid var(--line);padding:24px 18px;text-align:center}
.cu .ic{width:46px;height:46px;margin:0 auto 12px;border-radius:50%;background:var(--gold-l);
  color:var(--gold-d);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:900}
.cu h4{font-size:15.5px;font-weight:900;letter-spacing:2px}
.cu p{font-size:12.5px;color:var(--muted);margin-top:6px}

/* cases */
.cases{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case{background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);padding:24px 22px;display:flex;flex-direction:column}
.case .ctag{display:inline-block;align-self:flex-start;background:var(--green-l);color:var(--green);font-size:12px;letter-spacing:2px;padding:4px 12px;margin-bottom:12px}
.case h4{font-size:19px;font-weight:900;letter-spacing:2px;color:var(--green)}
.case .crow{margin-top:12px;font-size:13.5px;color:var(--muted)}
.case .crow b{color:var(--gold-d);letter-spacing:1px}
.case .crow span{display:block;margin-top:2px}

/* story */
.story{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.story .pic{border:2px solid var(--gold);overflow:hidden}
.story h3{font-size:22px;font-weight:900;letter-spacing:2px;color:var(--green);margin-bottom:14px}
.story p{font-size:14.5px;color:var(--muted);margin-bottom:12px}

/* advantages */
.adv{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.adv-card{background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);padding:24px 20px}
.adv-card h4{font-size:17px;font-weight:900;letter-spacing:1px;color:var(--green)}
.adv-card p{font-size:13.5px;color:var(--muted);margin-top:8px}

/* flow */
.flow{display:flex;align-items:stretch;gap:0;flex-wrap:wrap}
.fstep{flex:1;min-width:170px;background:#fff;border:1px solid var(--line);padding:22px 16px;position:relative;margin-right:26px;margin-bottom:26px}
.fstep:last-child{margin-right:0}
.fstep:after{content:"\25B6";position:absolute;right:-21px;top:50%;transform:translateY(-50%);
  color:var(--gold);font-size:14px}
.fstep:last-child:after{display:none}
.fstep .no{font-size:11px;color:var(--gold-d);letter-spacing:2px}
.fstep h4{font-size:16px;font-weight:900;margin-top:4px;letter-spacing:1px}
.fstep p{font-size:12.5px;color:var(--muted);margin-top:6px}
.fstep.hl{border-top:3px solid var(--gold)}

/* b2b rules */
.rules{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rule-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--red);padding:18px 16px}
.rule-card b{font-size:15px;letter-spacing:1px;display:block}
.rule-card span{font-size:12.5px;color:var(--muted)}

/* trust + faq + qr */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.trust div{background:#fff;border:1px solid var(--line);padding:16px;text-align:center;font-size:13.5px;letter-spacing:1px}
.trust b{color:var(--green);display:block;font-size:15px;margin-bottom:2px}
.faq{max-width:780px;margin:0 auto}
.faq details{border:1px solid var(--line);background:#fff;margin-bottom:12px;border-radius:4px;overflow:hidden}
.faq summary{padding:16px 20px;font-weight:900;letter-spacing:1px;cursor:pointer;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:before{content:"+";position:absolute;right:20px;color:var(--gold-d);font-size:20px;font-weight:900}
.faq details[open] summary:before{content:"\2212"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .ans{padding:0 20px 16px;font-size:14px;color:var(--muted)}
.qr-box{text-align:center;background:#fff;border:1px solid var(--line);padding:28px 20px;max-width:360px;margin:0 auto;border-radius:6px}
.qr-box img{width:200px;height:200px;margin:0 auto 14px;border:1px solid var(--line)}
.qr-box p{font-size:13px;color:var(--muted)}

/* contact + form */
.cta-band{background:var(--green);color:#fff;padding:52px 20px;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.8);margin:12px 0 24px;font-size:14.5px;letter-spacing:1px}
.form-wrap{max-width:560px;margin:18px auto 0;text-align:left}
.form-wrap input,.form-wrap textarea{width:100%;padding:11px 14px;border:1px solid rgba(255,255,255,.4);
  background:rgba(255,255,255,.1);color:#fff;border-radius:2px;font-size:14px;font-family:inherit}
.form-wrap input::placeholder,.form-wrap textarea::placeholder{color:rgba(255,255,255,.6)}
.form-wrap .row{display:flex;gap:12px;flex-wrap:wrap}
.form-wrap .row > *{flex:1;min-width:150px}
.form-wrap textarea{min-height:84px;resize:vertical}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-wrap button{margin-top:14px;width:100%;border:none;cursor:pointer}

/* footer */
footer{background:var(--green-d);color:rgba(255,255,255,.55);padding:26px 20px;text-align:center;
  font-size:12.5px;letter-spacing:1px}
footer b{color:#d8b45a;letter-spacing:3px}

/* phone link */
a.tel{color:#e8c874;text-decoration:none;font-weight:900;letter-spacing:.5px}
a.tel:hover{text-decoration:underline}

/* sticky mobile cta */
.sticky-cta{display:none;position:fixed;left:0;right:0;bottom:0;z-index:60}
.sticky-cta a{flex:1;text-align:center;color:#fff;text-decoration:none;font-weight:900;
  letter-spacing:1px;font-size:14px;padding:13px 6px}
.sticky-cta .sc-form{background:var(--gold)}
.sticky-cta .sc-tel{background:var(--green);border-left:1px solid rgba(255,255,255,.25)}

/* responsive */
@media(max-width:900px){
  .flow{flex-direction:column}
  .fstep{margin-right:0}
  .fstep:after{display:none}
  .story{grid-template-columns:1fr;gap:20px}
}
@media(max-width:780px){
  .prods,.custom,.adv,.trust,.rules{grid-template-columns:repeat(2,1fr)}
  .specgrid{grid-template-columns:repeat(2,1fr)}
  .navlinks{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;gap:0;padding:0;border-bottom:1px solid var(--line);display:none}
  .navlinks.open{display:flex}
  .navlinks a{padding:14px 22px;border-top:1px solid var(--line)}
  .nav-toggle{display:flex}
  .nav .btn{margin:12px 22px}
  .hero{padding:54px 18px 70px}
  .hero h1{font-size:30px;letter-spacing:1px}
  .hero .rule{flex-wrap:wrap}
  .hero .rule span{flex:1;text-align:center;font-size:12px;padding:8px 10px}
  section{padding:40px 0}
  h2{font-size:22px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metrics .m{border-bottom:1px solid var(--line)}
  .value3{grid-template-columns:1fr}
  .sticky-cta{display:flex}
}
@media(max-width:480px){
  .prods,.custom,.adv,.trust,.rules,.specgrid,.cases{grid-template-columns:1fr}
  .brand-name{font-size:19px;letter-spacing:3px}
  .seal{width:38px;height:38px}
  .hero h1{font-size:26px}
  .wrap{padding:0 16px}
}