:root{
  --navy:#8f1d1d;
  --navy-deep:#6b1212;
  --orange:#e8792c;
  --orange-deep:#cf5f12;
  --bg:#f4f6f8;
  --card:#ffffff;
  --ink:#1f2a36;
  --ink-soft:#5b6b7a;
  --line:#e2e8ee;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{font-family:'Noto Sans SC',system-ui,-apple-system,'Microsoft YaHei',sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;overflow-x:hidden}
button,input,textarea,select{font-family:inherit}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.sec-head{max-width:720px;margin:0 auto 52px;text-align:center}
.sec-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--orange);text-transform:uppercase;margin-bottom:10px}
.sec-title{font-size:clamp(26px,4vw,38px);font-weight:900;color:var(--navy-deep);line-height:1.3}
.sec-sub{color:var(--ink-soft);margin-top:14px;font-size:16px}

/* ===== 顶部导航 ===== */
.topbar{background:var(--navy-deep);color:#fff;font-size:13px;position:sticky;top:0;z-index:110}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar .tb-contact{display:flex;gap:22px;align-items:center}
.topbar .tb-contact span{display:inline-flex;align-items:center;gap:6px}
.topbar svg{width:14px;height:14px;fill:var(--orange)}
.nav{position:sticky;top:38px;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:19px;color:var(--navy-deep)}
.logo .mark{width:38px;height:38px;border-radius:8px;background:var(--navy);display:grid;place-items:center;color:var(--orange);font-size:16px}
.logo-img img{height:34px;width:auto;object-fit:contain;display:block}
.logo-img span{font-size:17px;font-weight:800;white-space:nowrap;line-height:1.2}
.footer-logo img{height:38px;width:auto;object-fit:contain;background:#fff;padding:6px 14px;border-radius:8px;display:block}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{font-size:15px;font-weight:500;color:var(--ink);position:relative;padding:4px 0}
.nav-links a:hover{color:var(--orange)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--orange);transition:width .25s}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--orange)}
.nav-links a.active::after{width:100%}
.nav-cta{background:var(--orange);color:#fff;padding:9px 18px;border-radius:6px;font-weight:700;font-size:14px}
.nav-cta:hover{background:var(--orange-deep)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.burger span{width:24px;height:3px;background:var(--navy-deep);border-radius:2px}

/* ===== 内页页头 ===== */
.page-hero{position:relative;color:#fff;background:var(--navy-deep);padding:72px 0;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 30%,rgba(232,121,44,.22),transparent 58%)}
.page-hero .wrap{position:relative;z-index:2;text-align:center}
.page-hero h1{font-size:clamp(28px,4.4vw,42px);font-weight:900;line-height:1.25}
.page-hero .ph-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#ffd9bd;background:rgba(232,121,44,.16);border:1px solid rgba(232,121,44,.5);padding:6px 14px;border-radius:100px;margin-bottom:18px}
.page-hero .ph-desc{color:#c3d3e1;margin:14px auto 0;max-width:660px;font-size:16px}
.page-hero .crumb{font-size:13px;color:#9db1c4;margin-top:20px}
.page-hero .crumb a{color:#ffd9bd}
.page-hero .crumb a:hover{color:#fff}

/* ===== Hero ===== */
.hero{position:relative;color:#fff;overflow:hidden;min-height:640px;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;background:url(assets/hero-banner.jpg) 70% center/cover no-repeat}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(45,8,8,.9) 0%,rgba(45,8,8,.7) 30%,rgba(45,8,8,.28) 55%,rgba(45,8,8,0) 80%)}
.hero .wrap{position:relative;z-index:2;padding:90px 24px;text-align:left;max-width:620px;margin-left:clamp(40px,6vw,110px)}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;background:rgba(232,121,44,.16);border:1px solid rgba(232,121,44,.5);color:#ffd9bd;padding:7px 14px;border-radius:100px;margin-bottom:22px}
.hero-tag .dot{width:8px;height:8px;border-radius:50%;background:var(--orange)}
.hero h1{font-size:clamp(30px,5vw,52px);font-weight:900;line-height:1.22;max-width:760px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero-desc{font-size:clamp(16px,2vw,19px);color:#d6e2ec;max-width:640px;margin-top:20px}
.hero-btns{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:14px 26px;border-radius:8px;cursor:pointer;border:none;transition:all .2s}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-deep)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:52px;max-width:600px}
.hero-stat{border-left:3px solid var(--orange);padding:4px 0 4px 16px}
.hero-stat b{display:block;font-size:clamp(24px,3vw,34px);font-weight:900;color:#fff;white-space:nowrap}
.hero-stat span{font-size:14px;color:#b9c9d8}

/* ===== 产品 ===== */
.products{background:var(--card);padding:32px 0 72px}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.prod-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;transition:transform .25s,box-shadow .25s}
.prod-card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(15,45,75,.12)}
.prod-card img{width:100%;height:240px;object-fit:contain;background:#f4f6f8}
.prod-body{padding:24px}
.prod-tag{font-size:12px;font-weight:700;color:var(--orange);letter-spacing:.08em;margin-bottom:8px}
.prod-body h3{font-size:20px;font-weight:900;color:var(--navy-deep);margin-bottom:6px}
.prod-desc{font-size:14px;color:var(--ink-soft);margin-bottom:12px}
.prod-feats{list-style:none;margin-bottom:18px}
.prod-feats li{font-size:14px;color:var(--ink);padding-left:20px;position:relative;margin-bottom:6px}
.prod-feats li::before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:700}
.prod-more{font-size:14px;font-weight:700;color:var(--navy);cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.prod-more:hover{color:var(--orange)}
.prod-more svg{width:14px;height:14px}

/* ===== 公司介绍 ===== */
.about{background:#fff;padding:72px 0 36px}
.about-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:48px;align-items:center}
.about-img{overflow:hidden;border-radius:14px;box-shadow:0 12px 32px rgba(0,0,0,.10)}
.about-img img{width:100%;display:block;object-fit:cover}
.about-text p{font-size:16px;line-height:1.95;color:#3b4551;margin-bottom:14px}
@media(max-width:820px){.about-grid{grid-template-columns:1fr;gap:26px}}

/* ===== 定制能力 ===== */
.custom{background:var(--bg)}
.custom-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:44px}
.custom-tag{background:#fff;border:1px solid var(--line);border-radius:100px;padding:9px 20px;font-size:14px;font-weight:600;color:var(--navy-deep)}
.custom-tag b{color:var(--orange)}
.custom-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.custom-item{background:#fff;border:1px solid var(--line);border-left:4px solid var(--orange);border-radius:10px;padding:20px}
.custom-item .no{font-size:26px;font-weight:900;color:var(--orange);display:block;margin-bottom:6px}
.custom-item h4{font-size:16px;font-weight:700;color:var(--navy-deep);margin-bottom:6px}
.custom-item p{font-size:14px;color:var(--ink-soft)}

/* ===== 选择理由 ===== */
.why{background:var(--navy-deep);color:#fff}
.why .sec-title{color:#fff}
.why .sec-sub{color:#b9c9d8}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.why-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:26px}
.why-card .icon{width:52px;height:52px;border-radius:12px;background:var(--orange);display:grid;place-items:center;margin-bottom:16px}
.why-card .icon svg{width:26px;height:26px;fill:#fff}
.why-card h4{font-size:18px;font-weight:700;margin-bottom:8px}
.why-card p{font-size:14px;color:#c3d3e1}

/* ===== 服务流程 ===== */
.flow{background:var(--card)}
.flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.flow-step{position:relative;text-align:center;padding:0 8px}
.flow-step .num{width:64px;height:64px;margin:0 auto 16px;border-radius:50%;background:var(--navy);color:var(--orange);font-size:22px;font-weight:900;display:grid;place-items:center;position:relative;z-index:2}
.flow-step h4{font-size:17px;font-weight:700;color:var(--navy-deep);margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--ink-soft)}
.flow-line{position:absolute;top:32px;left:12.5%;right:12.5%;height:2px;background:var(--line);z-index:1}

/* ===== 车间工艺 ===== */
.workshop{background:var(--bg)}
.workshop-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.workshop-item{border-radius:14px;overflow:hidden;position:relative;height:340px}
.workshop-item img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.workshop-item:hover img{transform:scale(1.06)}
.workshop-item .cap{position:absolute;left:0;right:0;bottom:0;padding:20px;background:linear-gradient(transparent,rgba(80,15,15,.9));color:#fff}
.workshop-item .cap b{font-size:16px;font-weight:700}
.workshop-item .cap span{font-size:13px;color:#d6e2ec;display:block;margin-top:2px}

/* ===== 应用场景 ===== */
.apps{background:var(--card)}
.apps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.app-item{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:12px;padding:20px;background:#fff}
.app-item .ai{flex:none;width:44px;height:44px;border-radius:10px;background:rgba(232,121,44,.12);color:var(--orange);display:grid;place-items:center}
.app-item .ai svg{width:22px;height:22px;fill:var(--orange)}
.app-item h4{font-size:15px;font-weight:700;color:var(--navy-deep)}
.app-item p{font-size:13px;color:var(--ink-soft);margin-top:2px}

/* ===== 应用案例 ===== */
.cases{background:var(--bg)}
.cases-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case-card{border:1px solid var(--line);border-radius:14px;background:#fff;padding:26px}
.case-card .ctype{font-size:12px;font-weight:700;color:var(--orange);letter-spacing:.08em;margin-bottom:10px}
.case-card h4{font-size:18px;font-weight:900;color:var(--navy-deep);margin-bottom:8px}
.case-card p{font-size:14px;color:var(--ink-soft);margin-bottom:16px}
.case-more{font-size:14px;font-weight:700;color:var(--navy);cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.case-more:hover{color:var(--orange)}

/* ===== 标准规格表 ===== */
.spec-table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px;box-shadow:0 6px 20px rgba(15,45,75,.06)}
.spec-table{width:100%;border-collapse:collapse;table-layout:fixed;text-align:center;font-size:15px;min-width:640px}
.spec-table th{background:var(--navy);color:#fff;padding:14px 8px;font-weight:700;letter-spacing:.02em}
.spec-table td{padding:15px 8px;border-top:1px solid var(--line);color:var(--ink)}
.spec-table tbody tr:nth-child(even){background:#faf5f3}
.spec-table tbody tr:hover{background:#f3e7e1}
.spec-table .mod{color:var(--navy);font-weight:800}
.spec-note{margin-top:22px;text-align:center;font-size:15px;color:var(--navy);font-weight:700;letter-spacing:.06em}

/* ===== 知识中心 ===== */
.knowledge{background:var(--card)}
.knowledge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.know-item{border:1px solid var(--line);border-left:4px solid var(--orange);border-radius:10px;background:#fff;padding:18px 20px;cursor:pointer;transition:box-shadow .2s}
.know-item:hover{box-shadow:0 10px 28px rgba(15,45,75,.1)}
.know-item .no{color:var(--orange);font-weight:900;font-size:14px}
.know-item h4{font-size:15px;font-weight:700;color:var(--navy-deep);margin:8px 0 6px;line-height:1.5}
.know-item p{font-size:13px;color:var(--ink-soft);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== 生产实力 ===== */
.strength{background:var(--navy);color:#fff}
.strength .sec-title{color:#fff}
.strength .sec-sub{color:#b9c9d8}
.strength-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px}
.strength-num{text-align:center;padding:28px 10px;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
.strength-num b{display:block;font-size:clamp(30px,4vw,44px);font-weight:900;color:var(--orange)}
.strength-num span{font-size:14px;color:#c3d3e1}
.strength-note{max-width:760px;margin:44px auto 0;text-align:center;font-size:15px;color:#c3d3e1;line-height:2}

/* ===== FAQ ===== */
.faq{background:var(--bg)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;background:none;border:none;cursor:pointer;font-size:16px;font-weight:700;color:var(--navy-deep);text-align:left;font-family:inherit}
.faq-q .arr{flex:none;width:22px;height:22px;border-radius:50%;background:var(--navy);color:var(--orange);display:grid;place-items:center;transition:transform .25s}
.faq-q .arr svg{width:12px;height:12px}
.faq-item.open .arr{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 24px;color:var(--ink-soft);font-size:15px}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 20px}

/* ===== 联系 ===== */
.contact{background:var(--card)}
.contact-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:start}
.contact-info h3{font-size:26px;font-weight:900;color:var(--navy-deep);margin-bottom:8px}
.contact-info>p{color:var(--ink-soft);margin-bottom:26px}
.c-line{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start}
.c-line .ci{flex:none;width:44px;height:44px;border-radius:10px;background:rgba(232,121,44,.12);color:var(--orange);display:grid;place-items:center}
.c-line .ci svg{width:22px;height:22px;fill:var(--orange)}
.c-line b{font-size:15px;color:var(--navy-deep);display:block}
.c-line span{font-size:14px;color:var(--ink-soft);display:block}
.qr-box{display:flex;gap:14px;margin:2px 0 18px 58px}
.qr-item{width:104px;text-align:center;margin:0}
.qr-item img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:8px;border:1px solid var(--line);display:block;background:#fff}
.qr-item figcaption{font-size:12px;color:#6b7a89;margin-top:5px}
.contact-form{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:28px}
.contact-form h4{font-size:20px;font-weight:900;color:var(--navy-deep);margin-bottom:20px}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:13px;font-weight:600;color:var(--navy-deep);margin-bottom:6px}
.form-row input,.form-row textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.form-row input:focus,.form-row textarea:focus{outline:2px solid rgba(232,121,44,.5);border-color:var(--orange)}
.form-row textarea{resize:vertical;min-height:90px}

/* ===== 页脚 ===== */
footer{background:var(--navy-deep);color:#b9c9d8;padding:44px 0 26px}
.footer-top{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap;margin-bottom:30px}
.footer-brand .logo{color:#fff;margin-bottom:10px}
.footer-brand p{font-size:14px;max-width:340px}
.footer-links{display:flex;gap:52px}
.footer-col b{color:#fff;font-size:15px;display:block;margin-bottom:12px}
.footer-col a{display:block;font-size:14px;margin-bottom:8px}
.footer-col a:hover{color:var(--orange)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ===== 文章详情弹窗 ===== */
.modal{position:fixed;inset:0;z-index:999;display:none;align-items:center;justify-content:center;padding:20px}
.modal.show{display:flex}
.modal-overlay{position:absolute;inset:0;background:rgba(10,18,28,.58)}
.modal-box{position:relative;background:#fff;border-radius:14px;max-width:680px;width:100%;max-height:82vh;overflow-y:auto;padding:34px 38px;box-shadow:0 24px 60px rgba(0,0,0,.3)}
.modal-close{position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:50%;background:#eef1f4;border:none;cursor:pointer;font-size:18px;color:#5b6b7a;display:grid;place-items:center;line-height:1}
.modal-close:hover{background:#dfe5ea}
.modal-box h3{font-size:22px;font-weight:900;color:var(--navy-deep);margin:4px 0 18px;line-height:1.45;padding-right:30px}
.modal-box .mtag{display:inline-block;font-size:12px;font-weight:700;color:var(--orange);letter-spacing:.08em;margin-bottom:6px}
.modal-box p{font-size:15px;color:var(--ink);line-height:1.95;margin-bottom:16px}
.modal-box .pimg{width:100%;max-height:340px;object-fit:contain;border-radius:10px;border:1px solid var(--line);margin:2px 0 16px;display:block;background:#f6f8fa}

/* ===== Toast ===== */
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);background:var(--navy-deep);color:#fff;padding:13px 22px;border-radius:8px;font-size:14px;box-shadow:0 12px 30px rgba(0,0,0,.25);opacity:0;pointer-events:none;transition:all .3s;z-index:999}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
#backTop{position:fixed;right:24px;bottom:96px;width:46px;height:46px;border-radius:50%;background:var(--orange);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(232,121,44,.35);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;z-index:99}
#backTop.show{opacity:1;visibility:visible;transform:translateY(0)}
#backTop svg{width:20px;height:20px;fill:#fff}
#backTop:hover{background:var(--orange-deep)}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .nav-links{position:fixed;top:0;right:-280px;width:280px;height:100vh;background:#fff;flex-direction:column;align-items:flex-start;padding:70px 30px;gap:22px;box-shadow:-10px 0 30px rgba(0,0,0,.12);transition:right .3s;z-index:120}
  .nav-links.open{right:0}
  .nav-links a{font-size:17px}
  .nav-links .nav-cta{margin-top:10px}
  .burger{display:flex;z-index:130}
  .prod-grid,.custom-list,.why-grid,.flow-steps,.workshop-grid,.apps-grid,.cases-grid,.knowledge-grid,.strength-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .flow-line{display:none}
}
@media(max-width:560px){
  .section{padding:60px 0}
  .prod-grid,.custom-list,.why-grid,.flow-steps,.workshop-grid,.apps-grid,.cases-grid,.knowledge-grid,.strength-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .topbar .wrap{justify-content:center}
  .topbar .tb-contact{display:none}
  .footer-links{flex-direction:column;gap:24px}
  .workshop-item{height:240px}
  .hero{min-height:560px}
  .form-row input,.form-row textarea{font-size:16px}
  .page-hero{padding:56px 0}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important}
}