/* 田棚元帅智慧农业 - style.css 零依赖 */
:root{--green:#1c7c3c;--green-d:#135a2b;--green-l:#e8f5ec;--ink:#22301f;--muted:#6b7a67;--line:#e3ebe2;--bg:#fafcf9;--card:#ffffff;--radius:14px;--shadow:0 6px 24px rgba(24,80,40,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
img{max-width:100%;height:auto;display:block}
a{color:var(--green);text-decoration:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.nav-row{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand-badge{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--green),#3aa65c);color:#fff;font-weight:700;font-size:20px;display:flex;align-items:center;justify-content:center}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-txt b{font-size:18px;letter-spacing:2px}
.brand-txt i{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:3px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--ink);font-size:15px}
.nav a:hover{color:var(--green)}
.nav-tel{background:var(--green);color:#fff!important;padding:7px 16px;border-radius:20px;font-weight:600}
.nav-btn{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-btn span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px}
/* hero */
.hero{background:linear-gradient(120deg,#0f4d23 0%,#1c7c3c 55%,#3aa65c 100%);color:#fff;padding:88px 0 96px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.07)}
.hero h1{font-size:38px;line-height:1.3;letter-spacing:1px;max-width:640px}
.hero p.sub{margin-top:16px;font-size:17px;opacity:.92;max-width:600px}
.hero .hero-cta{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:26px;font-size:15px;font-weight:600}
.btn-light{background:#fff;color:var(--green-d)}
.btn-ghost{border:1px solid rgba(255,255,255,.65);color:#fff}
.hero-tags{margin-top:40px;display:flex;gap:10px;flex-wrap:wrap}
.hero-tags span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:18px;font-size:13px}
/* sections */
section{padding:64px 0}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head h2{font-size:28px;color:var(--green-d)}
.sec-head p{color:var(--muted);margin-top:8px}
.alt{background:#fff}
/* cards */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s}
.card:hover{transform:translateY(-4px)}
.card .cover{aspect-ratio:4/3;background:var(--green-l);overflow:hidden}
.card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.card:hover .cover img{transform:scale(1.05)}
.card .body{padding:18px 20px 22px}
.card h3{font-size:17px;color:var(--ink)}
.card .tag{display:inline-block;font-size:12px;color:var(--green);background:var(--green-l);padding:2px 10px;border-radius:12px;margin-bottom:8px}
.card p{font-size:14px;color:var(--muted);margin-top:8px}
.card .more{display:inline-block;margin-top:12px;font-size:14px;font-weight:600}
/* feature list */
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;text-align:center}
.feat .ic{width:54px;height:54px;margin:0 auto 14px;border-radius:14px;background:var(--green-l);display:flex;align-items:center;justify-content:center;font-size:26px}
.feat h3{font-size:16px}
.feat p{font-size:13.5px;color:var(--muted);margin-top:8px;text-align:left}
/* steps */
.steps{counter-reset:s;max-width:860px;margin:0 auto}
.step{display:flex;gap:18px;padding:18px 0;border-bottom:1px dashed var(--line)}
.step:last-child{border-bottom:0}
.step b.no{flex:0 0 40px;height:40px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px}
.step h3{font-size:16px}
.step p{font-size:14px;color:var(--muted)}
/* rich text（迁移正文，保留用于 about/contact） */
.rich{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 38px;box-shadow:var(--shadow)}
.rich p{margin:12px 0;font-size:15.5px;color:#33412e}
.rich img{margin:18px auto;border-radius:10px}
.rich strong,.rich b{color:var(--green-d)}
/* hero 双栏（图文均衡） */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.32);border:1px solid rgba(255,255,255,.28)}
.hero-visual::after{content:"";position:absolute;right:-14px;bottom:-14px;width:120px;height:120px;border-radius:20px;background:rgba(255,255,255,.12)}
/* 产品详情：相册 + 正文 */
.prod-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.prod-head h2{font-size:22px;color:var(--green-d)}
.album{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin-bottom:26px}
.ph{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.ph .im{display:block;aspect-ratio:4/3;overflow:hidden;background:var(--green-l)}
.ph img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.ph:hover img{transform:scale(1.04)}
.ph figcaption{font-size:12.5px;color:var(--muted);padding:8px 12px;border-top:1px solid var(--line);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.article{max-width:880px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;box-shadow:var(--shadow)}
.article p{margin:10px 0;font-size:15.5px;color:#33412e;text-align:justify}
.article strong,.article b{color:var(--green-d)}
/* 图文交替行（45/55，方向交替） */
.media-row{display:grid;grid-template-columns:0.92fr 1.08fr;gap:28px;align-items:center;margin:0 0 28px}
.media-row.rev .media-img{order:2}
.media-img{display:grid;gap:12px;align-content:center}
.media-img.two{grid-template-columns:1fr 1fr}
.media-img img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .3s}
.media-img img:hover{transform:scale(1.02)}
.media-txt p{margin:0 0 12px;font-size:15.5px;color:#33412e;text-align:justify}
.media-txt p:last-child{margin-bottom:0}
.media-txt strong,.media-txt b{color:var(--green-d)}
.media-row.pair{grid-template-columns:1fr 1fr;gap:14px}
.media-row.pair img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .3s}
.media-row.pair img:hover{transform:scale(1.02)}
.media-row.pair img:last-child:nth-child(odd){grid-column:span 2}
.back{margin-top:14px;font-size:14px}
/* product anchors */
.prod-sec{padding-top:30px}
.prod-anchor{scroll-margin-top:110px}
.cat-line{font-size:13px;color:var(--green);font-weight:600;letter-spacing:2px;margin:34px 0 6px}
/* 产品分类板块 */
.cat-tabs{position:sticky;top:64px;z-index:40;background:rgba(255,255,255,.97);backdrop-filter:blur(6px);border-bottom:1px solid var(--line);margin-bottom:36px}
.cat-tabs .wrap{display:flex;gap:10px;overflow-x:auto;padding:12px 20px;-webkit-overflow-scrolling:touch}
.cat-tabs a{flex:0 0 auto;font-size:14px;color:var(--ink);padding:8px 18px;border-radius:20px;border:1px solid var(--line);background:#fff;white-space:nowrap}
.cat-tabs a:hover{color:var(--green);border-color:var(--green)}
.cat-sec{padding:56px 0}
.cat-sec .sec-head{margin-bottom:32px;position:relative}
.cat-no{position:absolute;left:50%;top:-26px;transform:translateX(-50%);font-size:46px;font-weight:700;color:var(--green-l);line-height:1;pointer-events:none}
.cat-sec .sec-head h2{position:relative}
.cat-sec .prod-sec{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 28px;margin-bottom:22px}
.cat-sec.alt .prod-sec{border-color:var(--line)}
/* case */
.case-box{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center}
.case-box img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:16/9;object-fit:cover}
/* cta */
.cta{background:linear-gradient(120deg,var(--green-d),var(--green));color:#fff;border-radius:var(--radius);padding:44px 40px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.cta h2{font-size:24px}
.cta p{opacity:.9;margin-top:6px}
.cta .btn{background:#fff;color:var(--green-d)}
/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;text-align:center}
.contact-card .ic{font-size:30px}
.contact-card h3{margin-top:10px;font-size:16px}
.contact-card p{margin-top:8px;color:var(--muted);font-size:14.5px;word-break:break-all}
/* breadcrumb */
.crumb{font-size:13px;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)}
/* page header */
.phead{background:var(--green-l);padding:46px 0;margin-bottom:40px}
.phead h1{font-size:28px;color:var(--green-d)}
.phead p{color:var(--muted);margin-top:6px}
/* footer */
.site-footer{background:#152b1b;color:#cfe0d2;margin-top:70px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:34px;padding:48px 20px 36px}
.foot-grid h4{color:#fff;font-size:16px;margin-bottom:10px}
.foot-grid p{font-size:13.5px;line-height:1.9}
.foot-bar{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:12.5px}
.foot-bar a{color:#cfe0d2}
/* responsive */
@media (max-width:900px){
 .g3{grid-template-columns:repeat(2,1fr)}
 .feats{grid-template-columns:repeat(2,1fr)}
 .case-box{grid-template-columns:1fr}
 .foot-grid{grid-template-columns:1fr;gap:22px}
 .hero h1{font-size:30px}
 .hero-grid{grid-template-columns:1fr;gap:30px}
 .hero-visual{order:-1}
}
@media (max-width:640px){
 .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 24px;gap:16px;border-bottom:1px solid var(--line);align-items:flex-start}
 .nav.open{display:flex}
 .nav-btn{display:block}
 .g3,.g2,.feats,.contact-grid{grid-template-columns:1fr}
 section{padding:46px 0}
 .hero{padding:60px 0 70px}
 .rich,.article{padding:22px 18px}
 .media-row{grid-template-columns:1fr;gap:16px;margin-bottom:22px}
 .media-row.rev .media-img{order:0}
 .media-row.pair{gap:10px}
 .cat-sec{padding:44px 0}
 .cat-sec .prod-sec{padding:20px 16px}
 .cat-no{font-size:36px;top:-20px}
}