:root{
  --navy-900:#052e22; --navy-800:#095F46; --navy-700:#0d7a5a;
  --blue:#42B693; --blue-bright:#6fd3b5; --blue-tint:#E4F5EF;
  --ink:#0f2e24; --body:#48584f; --line:#e0ebe6; --bg:#f6f9f8;
  --green:#42B693; --white:#fff;
  --max:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;color:var(--body);background:var(--white);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;font-weight:700}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
section{padding:64px 0}
.sec-tag{display:inline-block;font-size:18px;letter-spacing:2px;color:var(--blue);font-weight:700;margin-bottom:12px}
.sec-title{font-size:clamp(26px,4vw,40px);margin-bottom:14px}
.sec-sub{max-width:640px;color:var(--body);font-size:17px;white-space:nowrap}
.center{text-align:center}
.center .sec-sub{margin:0 auto}

/* ===== 顶部导航 ===== */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:18px}
.logo-mark{width:32px;height:32px;flex:0 0 auto}
.logo small{font-size:11px;color:var(--body);font-weight:500;letter-spacing:1px}
.nav-links{display:none;gap:28px;font-size:15px}
.nav-links a{color:var(--ink);font-weight:500}
.nav-links a:hover{color:var(--blue)}
.btn{display:inline-block;padding:11px 22px;border-radius:8px;font-weight:600;font-size:15px;cursor:pointer;border:none;transition:.2s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#35a083}
.btn-ghost{background:transparent;color:#095F46;border:1px solid rgba(9,95,70,.4)}
.btn-ghost:hover{background:rgba(9,95,70,.08)}
.btn-outline{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn-outline:hover{background:var(--blue-tint)}
.nav .btn{padding:9px 18px;font-size:14px}
@media(min-width:860px){.nav-links{display:flex}}

/* ===== Hero ===== */
.hero{position:relative;color:var(--ink);overflow:hidden;padding:72px 0 80px;background:#eaf6f1}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(240,250,246,.55) 0%,rgba(240,250,246,.1) 55%,transparent 100%)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:1;z-index:0}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;gap:40px;align-items:center}
@media(min-width:900px){.hero-grid{grid-template-columns:1.1fr .9fr;gap:56px}}
.hero .eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:#0d7a5a;border:1px solid rgba(9,95,70,.35);border-radius:999px;padding:5px 14px;margin-bottom:20px}
.hero h1{color:#095F46;font-size:clamp(30px,5vw,50px);font-weight:800;letter-spacing:1px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero p.lead{font-size:16px;color:#3f5a50;max-width:560px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px 24px;max-width:560px}
.stat b{display:block;font-size:26px;color:#095F46;font-weight:800}
.stat span{font-size:13px;color:#5a7a6c}
.hero-product{position:relative;display:flex;justify-content:center;margin-top:72px}
.hero-product img{width:82%;filter:drop-shadow(0 24px 40px rgba(0,0,0,.35))}
.hero-badge{position:absolute;top:-14px;right:10px;background:var(--green);color:#062b16;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}

/* ===== 卖点 ===== */
.points{background:var(--bg)}
.points-grid{display:grid;gap:18px;margin-top:40px}
@media(min-width:640px){.points-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.points-grid{grid-template-columns:repeat(3,1fr)}}
.point{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 22px;transition:.2s}
.point:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(9,95,70,.1);border-color:#bfe6d6}
.point .ic{width:44px;height:44px;border-radius:10px;background:var(--blue-tint);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.point .ic svg{width:24px;height:24px;stroke:var(--blue);fill:none;stroke-width:1.8}
.point h3{font-size:19px;margin-bottom:8px}
.point p{font-size:18px;color:var(--body)}

/* ===== 主推产品 OT110S ===== */
.feature-grid{display:grid;gap:36px;align-items:center;margin-top:40px}
@media(min-width:900px){.feature-grid{grid-template-columns:1fr 1fr;gap:56px}}
.feature-img{background:linear-gradient(160deg,#f0f8f5,#e2f3ec);border-radius:18px;padding:36px;border:1px solid var(--line)}
.feature-img img{margin:0 auto}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 24px}
.chip{background:var(--blue-tint);color:var(--navy-700);font-size:14px;font-weight:600;padding:6px 13px;border-radius:999px}
.flist{list-style:none;display:grid;gap:12px;margin-top:8px}
.flist li{display:flex;gap:10px;font-size:15px;color:var(--ink)}
.flist li::before{content:"";flex:0 0 8px;height:8px;border-radius:50%;background:var(--blue);margin-top:9px}
.badge-hot{display:inline-block;background:var(--blue);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:6px;letter-spacing:1px;margin-bottom:14px}

/* ===== 产品系列 ===== */
.series{background:#fff}
.prod-grid{display:grid;gap:20px;margin-top:40px}
@media(min-width:600px){.prod-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.prod-grid{grid-template-columns:repeat(3,1fr)}}
.prod{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;display:flex;flex-direction:column;transition:.2s;text-decoration:none;color:inherit;cursor:pointer}
.prod:hover{box-shadow:0 14px 34px rgba(11,30,61,.1);transform:translateY(-3px)}
.prod.is-hot{border:1.5px solid var(--blue)}
.prod .pimg{background:transparent;border-radius:12px;padding:18px;display:flex;align-items:center;justify-content:center;min-height:170px;margin-bottom:16px}
.prod .pimg img{max-height:150px;object-fit:contain}
.prod h3{font-size:21px;display:flex;align-items:center;gap:8px}
.tag{font-size:12px;font-weight:600;color:#095F46;border:1px solid #bfe6d6;border-radius:5px;padding:1px 7px}
.prod .meta{font-size:18px;color:var(--body);margin:8px 0 4px}
.prod .go{margin-top:auto;padding-top:14px;font-size:15px;font-weight:600;color:var(--blue)}

/* ===== 参数表 ===== */
.table-wrap{overflow-x:auto;margin-top:36px;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;min-width:860px;background:#fff;font-size:14px}
th,td{padding:13px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
thead th{background:var(--navy-800);color:#fff;font-weight:600}
tbody th{color:var(--ink);font-weight:600;background:#f3f9f6}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:none}
td.hl{color:var(--blue);font-weight:700}

/* ===== 应用场景 ===== */
.scenes{background:var(--bg)}
.scene-grid{display:grid;gap:18px;margin-top:40px}
@media(min-width:600px){.scene-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.scene-grid{grid-template-columns:repeat(3,1fr)}}
.scene{position:relative;border-radius:14px;overflow:hidden;aspect-ratio:16/10}
.scene img{width:100%;height:100%;object-fit:cover;transition:.3s}
.scene:hover img{transform:scale(1.05)}
.scene::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(5,46,34,.85))}
.scene span{position:absolute;left:16px;bottom:14px;color:#fff;font-weight:600;font-size:15px;z-index:1}

/* ===== 行业场景 图标卡片 ===== */
.ind-grid{display:grid;gap:16px;margin-top:40px}
@media(min-width:640px){.ind-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.ind-grid{grid-template-columns:repeat(3,1fr)}}
.ind{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;gap:14px;align-items:flex-start;transition:.2s}
.ind:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(9,95,70,.1)}
.ind .ic{width:44px;height:44px;flex:0 0 44px;border-radius:11px;background:var(--blue-tint);display:flex;align-items:center;justify-content:center}
.ind .ic svg{width:23px;height:23px;stroke:var(--blue);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.ind h3{font-size:18px;margin-bottom:6px}
.ind p{font-size:15px;color:var(--body);line-height:1.65}

/* ===== 技术优势 ===== */
.adv-grid{display:grid;margin-top:40px;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
.adv{padding:28px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.adv:nth-child(5n){border-right:none}
.adv .num{font-size:13px;color:var(--blue);font-weight:700;letter-spacing:1px}
.adv h3{font-size:20px;margin:8px 0 10px}
.adv p{font-size:18px;color:var(--body)}
@media(min-width:768px){.adv-grid{grid-template-columns:repeat(3,1fr)}.adv{border-bottom:1px solid var(--line)}.adv:nth-child(3n){border-right:none}}
@media(min-width:1100px){.adv-grid{grid-template-columns:repeat(5,1fr)}.adv{border-bottom:none}.adv:nth-child(3n){border-right:1px solid var(--line)}.adv:nth-child(5n){border-right:none}}

/* ===== FAQ ===== */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:18px 20px;font-weight:600;color:var(--ink);font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--blue);font-weight:400}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 20px 18px;font-size:15px;color:var(--body)}

/* ===== CTA / 页脚 ===== */
.cta{background:linear-gradient(120deg,var(--navy-900),var(--navy-700));color:#fff;text-align:center}
.cta h2{color:#fff;font-size:clamp(24px,4vw,34px);margin-bottom:14px}
.cta p{color:#c4d4ec;max-width:560px;margin:0 auto 28px}
footer{background:var(--navy-900);color:#8fa6c8;padding:48px 0;font-size:14px}
.foot{display:grid;grid-template-columns:1fr;gap:28px;text-align:left}
@media(min-width:768px){.foot{grid-template-columns:1.4fr 1fr 1fr;gap:40px}}
.foot-brand{font-size:20px;font-weight:800;color:#fff;letter-spacing:1px;margin-bottom:10px}
.foot-h{font-size:15px;font-weight:700;color:#fff;margin-bottom:10px}
.foot p{margin:0;line-height:1.9}
.foot a{color:#8fa6c8}
.foot a:hover{color:#fff}
.foot-col a{color:#c4d4ec}
.foot-col a:hover{color:#fff}
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:.3s;z-index:99;box-shadow:0 10px 30px rgba(0,0,0,.3)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
/* ===== 资质认证 ===== */
.certs{background:var(--bg)}
.cert-grid{display:grid;gap:22px;margin-top:40px}
@media(min-width:600px){.cert-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.cert-grid{grid-template-columns:repeat(3,1fr)}}
.cert{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.cert:hover{box-shadow:0 14px 34px rgba(11,30,61,.1);transform:translateY(-3px)}
.cert .cimg{background:#f3f9f6;padding:14px;display:flex;align-items:center;justify-content:center}
.cert .cimg img{max-width:100%;max-height:210px;object-fit:contain;border:1px solid var(--line);border-radius:6px;background:#fff}
.cert .cbody{padding:18px 20px 20px}
.cert .cbody h3{font-size:18px;color:var(--navy-800);margin-bottom:8px}
.cert .cbody p{font-size:15px;color:var(--body);line-height:1.7;margin:0}
.cert .cbody p b{color:var(--ink);font-weight:600}
@media(max-width:640px){section{padding:48px 0}.hero{padding:56px 0}}