/* ============================================================
   耀涛农业 · Design System — Terminal meets Editorial
   paper #f6f4ec / ink #17251d / green-deep #1d4a36
   serif display (Noto Serif SC) + mono labels (JetBrains Mono)
   ============================================================ */
:root{
  --paper:#f6f4ec; --paper-2:#efede2;
  --ink:#17251d; --ink-2:#3c4a41; --muted:#6e7a70;
  --line:#d9d4c4; --line-strong:#b9b29b;
  --green:#2e6b4f; --green-deep:#1d4a36; --green-bright:#3e8e68;
  --amber:#c07a2d;
  --mono:"JetBrains Mono","SF Mono",ui-monospace,"Menlo",monospace;
  --serif:"Noto Serif SC","Songti SC","STSong",serif;
  --sans:-apple-system,"PingFang SC","Helvetica Neue",sans-serif;
  --maxw:1180px;
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px; --sp-5:48px; --sp-6:64px; --sp-7:96px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
::selection{background:var(--green);color:#fff}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--green);outline-offset:3px}

.k{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--green)}
.k.dim{color:var(--muted)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- Nav ---------- */
nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(246,244,236,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
nav.scrolled{box-shadow:0 1px 0 var(--line-strong)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:0 28px;height:62px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:baseline;gap:12px}
.brand .zh{font-family:var(--serif);font-size:21px;font-weight:700;letter-spacing:.08em}
.brand .en{font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--muted)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;color:var(--ink-2);padding:4px 0;border-bottom:1px solid transparent;transition:.25s}
.nav-links a:hover{color:var(--green);border-bottom-color:var(--green)}
.nav-links a.active{color:var(--green);border-bottom-color:var(--green)}
.nav-cta{font-family:var(--mono);font-size:12px;letter-spacing:.1em;border:1px solid var(--green);color:var(--green);padding:7px 16px;transition:.25s}
.nav-cta:hover{background:var(--green);color:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--line-strong);padding:6px 10px;font-family:var(--mono);font-size:12px;cursor:pointer;color:var(--ink)}

/* ---------- Hero / generic ---------- */
.hero{padding:150px 0 90px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.hero h1{font-family:var(--serif);font-size:clamp(38px,5vw,60px);font-weight:900;line-height:1.25;letter-spacing:.02em;margin:22px 0 26px}
.hero h1 em{font-style:normal;color:var(--green);position:relative}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:8px;background:var(--green);opacity:.14}
.hero p.lead{font-size:17px;color:var(--ink-2);max-width:34em;margin-bottom:38px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.hero-visual{position:relative;text-align:center}
.hero-visual .frame{border:1px solid var(--line-strong);background:#fff;padding:34px 20px 18px;position:relative;box-shadow:14px 14px 0 rgba(46,107,79,.09)}
.hero-visual .frame::before{content:"FIG.01 — 四情综合监测站 ZD-GS-A66";position:absolute;top:10px;left:14px;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--muted)}
.hero-visual img{height:380px;width:auto;margin:0 auto;mix-blend-mode:multiply}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{font-family:var(--mono);font-size:13px;letter-spacing:.1em;padding:13px 26px;display:inline-block;transition:.25s;cursor:pointer;border:none}
.btn-solid{background:var(--green-deep);color:#f2efe4;border:1px solid var(--green-deep)}
.btn-solid:hover{background:var(--green)}
.btn-ghost{background:none;border:1px solid var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--green);color:var(--green)}

.page-head{padding:140px 0 64px;border-bottom:1px solid var(--line)}
.page-head h1{font-family:var(--serif);font-size:clamp(32px,4vw,48px);font-weight:900;margin:18px 0 16px}
.page-head p{color:var(--ink-2);max-width:38em}
.crumbs{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}
.crumbs a:hover{color:var(--green)}

section{padding:96px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:24px;margin-bottom:54px;flex-wrap:wrap}
.sec-head h2{font-family:var(--serif);font-size:clamp(28px,3.4vw,40px);font-weight:900;letter-spacing:.03em}
.sec-head .idx{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.2em}

/* ---------- Stats ---------- */
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);margin-top:80px}
.stat{padding:26px 8px 0;border-left:1px solid var(--line)}
.stat:first-child{border-left:none;padding-left:0}
.stat:last-child{padding-right:0}
.stat .num{font-family:var(--serif);font-size:34px;font-weight:900;color:var(--green-deep);font-variant-numeric:tabular-nums}
.stat .num span{font-size:16px;color:var(--muted);font-weight:400;margin-left:2px}
.stat .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--muted);margin-top:4px}

/* ---------- Category grid ---------- */
#lines{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
.cat{background:var(--paper-2);padding:30px 28px 26px;position:relative;transition:background .3s;display:block}
.cat:hover{background:#fff}
.cat .no{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.18em}
.cat h3{font-family:var(--serif);font-size:21px;font-weight:700;margin:10px 0 6px}
.cat .count{font-family:var(--mono);font-size:11px;color:var(--green);letter-spacing:.1em;margin-bottom:12px}
.cat p{font-size:13.5px;color:var(--muted);line-height:1.75}
.cat .arrow{position:absolute;top:30px;right:26px;font-family:var(--mono);color:var(--line-strong);transition:.3s;font-size:14px}
.cat:hover .arrow{color:var(--green);transform:translateX(4px)}
.cat.solid{background:var(--green-deep)}
.cat.solid h3{color:#f2efe4}
.cat.solid p{color:#b9c4b9}
.cat.solid .no{color:rgba(255,255,255,.5)}
.cat.solid .count{color:var(--green-bright)}
.cat.solid .arrow{color:var(--green-bright)}

/* ---------- Filters ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:44px}
.filters button{font-family:var(--mono);font-size:12px;letter-spacing:.1em;background:none;border:1px solid var(--line-strong);color:var(--ink-2);padding:8px 18px;cursor:pointer;transition:.25s}
.filters button:hover{border-color:var(--green);color:var(--green)}
.filters button.active{background:var(--green-deep);border-color:var(--green-deep);color:#f2efe4}

/* ---------- Product grid ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.prod{background:var(--paper);padding:26px 22px 24px;display:flex;flex-direction:column;transition:background .3s}
.prod:hover{background:#fff}
.prod .ph{background:#fff;border:1px solid var(--line);height:230px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;overflow:hidden}
.prod .ph img{max-height:200px;width:auto;transition:transform .5s ease}
.prod:hover .ph img{transform:scale(1.05)}
.prod .model{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--green);margin-bottom:6px}
.prod h4{font-family:var(--serif);font-size:17.5px;font-weight:700;line-height:1.45;margin-bottom:12px}
.prod ul{list-style:none;margin-top:auto}
.prod li{font-size:12px;color:var(--muted);padding:5px 0;border-top:1px dashed var(--line);display:flex;justify-content:space-between;gap:10px}
.prod li b{color:var(--ink-2);font-weight:600;white-space:nowrap}
.prod .tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.tag{font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--green-deep);background:rgba(46,107,79,.1);padding:2px 8px}
.prod.hidden{display:none}
.ph-empty{height:100%;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:var(--line-strong);background:repeating-linear-gradient(45deg,#fff,#fff 12px,#faf9f4 12px,#faf9f4 24px)}
.ph-empty .glyph{font-family:var(--serif);font-size:34px;font-weight:900;color:var(--line)}
.ph-empty .m{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--muted)}

/* ---------- Detail page ---------- */
.detail-top{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;padding:60px 0 30px}
.detail-ph{background:#fff;border:1px solid var(--line-strong);padding:44px 26px;display:flex;align-items:center;justify-content:center;min-height:480px;box-shadow:14px 14px 0 rgba(46,107,79,.09)}
.detail-ph img{max-height:520px;width:auto;mix-blend-mode:multiply}
.detail-ph .ph-empty{width:100%;height:420px}
.detail-info h1{font-family:var(--serif);font-size:clamp(26px,3vw,36px);font-weight:900;line-height:1.35;margin:12px 0 18px}
.detail-info .model{font-family:var(--mono);font-size:13px;letter-spacing:.18em;color:var(--green)}
.detail-info .intro{color:var(--ink-2);font-size:15px;margin:22px 0 26px}
.feat-list{list-style:none;border-top:1px solid var(--line)}
.feat-list li{display:flex;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:14px}
.feat-list li b{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--green-deep);min-width:96px;padding-top:2px}
.spec-table{width:100%;border-collapse:collapse;border:1px solid var(--line-strong);background:#fff}
.spec-table th,.spec-table td{padding:12px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:13.5px}
.spec-table th{width:220px;background:var(--paper-2);font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--ink-2);font-weight:600;vertical-align:top}
.spec-table tr:last-child td,.spec-table tr:last-child th{border-bottom:none}
.spec-table td{color:var(--ink)}
.detail-sec{padding:48px 0}
.detail-sec .sec-head{margin-bottom:34px}

/* ---------- Flow (solution) ---------- */
.dark{background:var(--ink);color:#e8e6da}
.dark .k{color:var(--green-bright)}
.dark .sec-head h2{color:#f2efe4}
.dark .sec-head .idx{color:#8b978c}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12)}
.step{background:var(--ink);padding:28px 22px 30px;position:relative;transition:background .3s}
.step:hover{background:#20322a}
.step .s-no{font-family:var(--mono);font-size:11px;color:var(--green-bright);letter-spacing:.2em}
.step h4{font-family:var(--serif);font-size:17px;font-weight:700;margin:12px 0 8px;color:#f2efe4}
.step p{font-size:12.5px;color:#9aa69b;line-height:1.75}
.sol-note{margin-top:34px;font-family:var(--mono);font-size:12px;color:#8b978c;letter-spacing:.06em;border-left:2px solid var(--green-bright);padding-left:16px;line-height:2}
.sol-note b{color:#e8e6da;font-weight:600}

/* ---------- Advantages ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.adv{background:var(--paper);padding:34px 32px;transition:background .3s}
.adv:hover{background:#fff}
.adv .a-no{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.2em}
.adv h4{font-family:var(--serif);font-size:20px;font-weight:700;margin:12px 0 10px}
.adv p{font-size:13.5px;color:var(--muted);line-height:1.8}

/* ---------- Scenes ---------- */
#scenes{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.scene-row{display:flex;align-items:baseline;gap:26px;padding:22px 4px;border-bottom:1px solid var(--line);transition:.25s;flex-wrap:wrap}
.scene-row:first-of-type{border-top:1px solid var(--line)}
.scene-row:hover{padding-left:14px;background:rgba(46,107,79,.04)}
.scene-row .s-idx{font-family:var(--mono);font-size:11px;color:var(--green);letter-spacing:.14em;min-width:44px}
.scene-row .s-name{font-family:var(--serif);font-size:19px;font-weight:700;min-width:180px}
.scene-row .s-desc{font-size:13px;color:var(--muted);flex:1;min-width:260px}
.scene-row .s-models{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em}

/* ---------- Contact ---------- */
.contact-card{border:1px solid var(--line-strong);background:#fff;padding:70px 60px;display:grid;grid-template-columns:1.2fr .8fr;gap:60px;box-shadow:14px 14px 0 rgba(46,107,79,.08)}
.contact-card h2{font-family:var(--serif);font-size:clamp(28px,3.4vw,40px);font-weight:900;margin:18px 0 20px}
.contact-card p{color:var(--ink-2);font-size:15px;max-width:30em}
.c-rows{display:flex;flex-direction:column;gap:0;justify-content:center}
.c-row{display:flex;gap:20px;padding:18px 0;border-bottom:1px dashed var(--line);align-items:baseline}
.c-row:last-child{border-bottom:none}
.c-row .c-l{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--muted);min-width:88px}
.c-row .c-v{font-size:16px;font-weight:600}
.c-row .c-v small{display:block;font-family:var(--mono);font-size:10.5px;color:var(--amber);font-weight:400;letter-spacing:.08em;margin-top:2px}

/* ---------- Form ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-grid .full{grid-column:1/-1}
.field label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--muted);margin-bottom:8px}
.field input,.field textarea,.field select{
  width:100%;background:var(--paper);border:1px solid var(--line-strong);
  padding:12px 14px;font-size:14.5px;font-family:var(--sans);color:var(--ink);
  transition:border-color .25s;border-radius:0;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--green)}
.field textarea{min-height:120px;resize:vertical}
.form-msg{font-family:var(--mono);font-size:12px;color:var(--green);margin-top:16px;min-height:18px;letter-spacing:.06em}

/* ---------- Empty state ---------- */
.empty{border:1px dashed var(--line-strong);background:#fff;padding:70px 30px;text-align:center}
.empty .e-g{font-family:var(--serif);font-size:30px;font-weight:900;color:var(--line-strong)}
.empty p{font-family:var(--mono);font-size:12px;color:var(--muted);margin-top:12px;letter-spacing:.08em}

/* ---------- CTA band ---------- */
.cta-band{background:var(--green-deep);color:#f2efe4;padding:64px 0}
.cta-in{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.cta-in h3{font-family:var(--serif);font-size:clamp(22px,2.6vw,30px);font-weight:900}
.cta-in .k{color:var(--green-bright)}
.btn-light{background:#f2efe4;color:var(--green-deep);border:1px solid #f2efe4}
.btn-light:hover{background:transparent;color:#f2efe4}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);padding:44px 0 40px;background:var(--paper-2)}
.foot-in{display:flex;justify-content:space-between;align-items:baseline;gap:20px;flex-wrap:wrap}
.foot-links{display:flex;gap:22px;font-family:var(--mono);font-size:11px;letter-spacing:.08em}
.foot-links a{color:var(--muted)}
.foot-links a:hover{color:var(--green)}
footer p{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.06em;line-height:2}
.beian{flex-basis:100%}.beian a{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line-strong);padding-bottom:2px}.beian a:hover{color:var(--ink)}

/* ---------- Reveal ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.6,.2,1),transform .8s cubic-bezier(.2,.6,.2,1)}
.rv.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:1000px){
  .hero{padding:120px 0 60px}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{order:-1}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .detail-top{grid-template-columns:1fr;gap:36px}
  .contact-card{grid-template-columns:1fr;padding:44px 30px}
  .nav-links{
    display:none;position:absolute;top:62px;left:0;right:0;
    background:var(--paper);border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;padding:20px 28px;gap:16px;
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
}
@media(max-width:600px){
  .cat-grid,.prod-grid,.flow,.adv-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  section{padding:64px 0}
  .page-head{padding:110px 0 44px}
  .form-grid{grid-template-columns:1fr}
  .spec-table th{width:120px}
}