/* ============================================================
   苏州市德祐模型科技有限公司 — 官网设计系统
   行业：手板模型 / CNC精密加工 / 3D打印  |  VI：工业深蓝 + 橙金
   ============================================================ */

:root{
  --bg:#0B1420;
  --bg-2:#0F1B2B;
  --surface:#13202F;
  --surface-2:#19293B;
  --surface-3:#203349;
  --primary:#2F80ED;        /* 科技蓝 */
  --primary-deep:#1B4F9C;
  --accent:#ED8936;         /* 工业橙 */
  --gold:#C9A96E;           /* 高端金 */
  --text:#EAF1F8;
  --text-dim:#9CB0C6;
  --text-mute:#6B7E94;
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);
  --radius:14px;
  --radius-lg:22px;
  --maxw:1200px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --glow:0 0 0 1px rgba(47,128,237,.25),0 10px 40px rgba(47,128,237,.18);
  --ff-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --ff-head:"Noto Serif SC","Songti SC",serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--ff-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 文字 ---------- */
h1,h2,h3,h4{font-family:var(--ff-head);line-height:1.25;font-weight:700;letter-spacing:.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.82rem;letter-spacing:3px;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--accent)}
.section-title{font-size:clamp(1.7rem,3.4vw,2.6rem);margin-bottom:14px}
.section-sub{color:var(--text-dim);max-width:680px;font-size:1.02rem}
.section{padding:84px 0}
.section--tight{padding:60px 0}
.grad-text{background:linear-gradient(100deg,var(--primary),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:.98rem;
  border:1px solid transparent;cursor:pointer;transition:.25s;white-space:nowrap;
}
.btn--primary{background:linear-gradient(100deg,var(--primary),var(--primary-deep));color:#fff;box-shadow:var(--glow)}
.btn--primary:hover{transform:translateY(-2px);filter:brightness(1.08)}
.btn--ghost{border-color:var(--border-strong);color:var(--text);background:rgba(255,255,255,.03)}
.btn--ghost:hover{border-color:var(--primary);color:#fff}
.btn--gold{background:linear-gradient(100deg,var(--gold),#b08d4f);color:#1a1206}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:90;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 0;transition:.3s;
  background:transparent;
}
.nav.scrolled{background:rgba(11,20,32,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);padding:12px 0}
.nav__brand{display:flex;align-items:center;gap:11px;font-family:var(--ff-head);font-weight:700;font-size:1.18rem}
.nav__logo{height:48px;width:auto;display:block;border-radius:6px}
.nav__menu{display:flex;gap:6px;align-items:center}
.nav__menu a{padding:9px 15px;border-radius:9px;color:var(--text-dim);font-size:.96rem;transition:.2s;font-weight:500}
.nav__menu a:hover,.nav__menu a.active{color:#fff;background:rgba(255,255,255,.06)}
.nav__toggle{display:none;background:none;border:1px solid var(--border-strong);border-radius:9px;color:#fff;padding:8px 12px;font-size:1.2rem;cursor:pointer}
@media(max-width:920px){
  .nav__menu{position:fixed;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;background:rgba(11,20,32,.97);padding:16px;display:none;border-bottom:1px solid var(--border)}
  .nav__menu.open{display:flex}
  .nav__toggle{display:block}
}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
.hero__bg{position:absolute;inset:0;z-index:0}
.hero__bg img{width:100%;height:100%;object-fit:cover;filter:saturate(.9) brightness(.62)}
.hero__bg::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,20,32,.94) 8%,rgba(11,20,32,.72) 45%,rgba(11,20,32,.4) 100%)}
.hero__grid{position:absolute;inset:0;z-index:1;background-image:linear-gradient(rgba(47,128,237,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(47,128,237,.06) 1px,transparent 1px);background-size:44px 44px;mask:radial-gradient(circle at 30% 40%,#000,transparent 75%)}
.hero__inner{position:relative;z-index:2;padding-top:90px}
.hero h1{font-size:clamp(2.2rem,5.4vw,4rem);max-width:880px;margin-bottom:22px}
.hero p.lead{font-size:clamp(1.02rem,1.6vw,1.22rem);color:var(--text-dim);max-width:640px;margin-bottom:30px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap}
.hero__stats{display:flex;gap:34px;margin-top:52px;flex-wrap:wrap}
.hero__stat .n{font-family:var(--ff-head);font-size:2rem;font-weight:700;color:#fff}
.hero__stat .l{color:var(--text-mute);font-size:.9rem}
.hero__badge{position:absolute;right:6%;top:30%;z-index:2;width:150px;height:150px;border-radius:50%;border:1px solid var(--border-strong);display:grid;place-items:center;text-align:center;background:rgba(19,32,47,.5);backdrop-filter:blur(6px);animation:spin 22s linear infinite}
.hero__badge span{font-size:.82rem;color:var(--gold);letter-spacing:1px;padding:0 20px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 通用区块 ---------- */
.section-head{text-align:center;max-width:760px;margin:0 auto 52px}
.section-head .section-sub{margin:0 auto}
.grid{display:grid;gap:22px}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.cols-3,.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.cols-2,.cols-3,.cols-4{grid-template-columns:1fr}}

.card{background:linear-gradient(180deg,var(--surface),var(--bg-2));border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px;transition:.28s;position:relative;overflow:hidden}
.card:hover{border-color:var(--border-strong);transform:translateY(-4px);box-shadow:var(--shadow)}
.card__icon{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;font-size:1.5rem;background:rgba(47,128,237,.14);border:1px solid rgba(47,128,237,.3);margin-bottom:18px;color:var(--primary)}
.card h3{font-size:1.22rem;margin-bottom:10px}
.card p{color:var(--text-dim);font-size:.97rem}
.card .tag{display:inline-block;margin-top:14px;font-size:.8rem;color:var(--gold);border:1px solid rgba(201,169,110,.35);padding:3px 11px;border-radius:999px}

/* 特性条 */
.feature-row{display:flex;gap:18px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
.feature-row:last-child{border-bottom:none}
.feature-row .ic{flex:0 0 42px;width:42px;height:42px;border-radius:11px;background:rgba(237,137,54,.14);display:grid;place-items:center;color:var(--accent);font-size:1.2rem}
.feature-row h4{font-size:1.05rem;margin-bottom:4px;font-family:var(--ff-body)}
.feature-row p{color:var(--text-dim);font-size:.94rem}

/* 图片卡片 */
.media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);aspect-ratio:4/3}
.media img{width:100%;height:100%;object-fit:cover;transition:.4s}
.media:hover img{transform:scale(1.05)}
.media__cap{position:absolute;left:0;right:0;bottom:0;padding:18px;background:linear-gradient(transparent,rgba(7,13,22,.92));font-weight:600}

/* 流程步骤 */
.steps{counter-reset:s;display:grid;gap:18px}
.step{display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.step::before{counter-increment:s;content:counter(s);flex:0 0 44px;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--gold));color:#08111c;font-weight:800;display:grid;place-items:center;font-family:var(--ff-head);font-size:1.2rem}
.step h4{font-family:var(--ff-body);font-size:1.06rem;margin-bottom:4px}
.step p{color:var(--text-dim);font-size:.94rem}

/* 数据带 */
.statband{background:linear-gradient(100deg,var(--primary-deep),#0c2c57);border-radius:var(--radius-lg);padding:40px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.statband .n{font-family:var(--ff-head);font-size:2.4rem;font-weight:700;color:#fff}
.statband .l{color:rgba(255,255,255,.78);font-size:.92rem;margin-top:4px}
@media(max-width:760px){.statband{grid-template-columns:repeat(2,1fr);padding:28px}}

/* 面包屑 */
.crumb{font-size:.86rem;color:var(--text-mute);padding:96px 0 0}
.crumb a:hover{color:var(--primary)}
.crumb span{margin:0 8px;color:var(--border-strong)}

/* 页脚 */
.footer{margin-top:90px;border-top:1px solid var(--border);background:var(--bg-2);padding:56px 0 26px}
.footer__top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px;margin-bottom:36px}
.footer h5{font-family:var(--ff-body);font-size:1rem;margin-bottom:16px;color:#fff}
.footer a{display:block;color:var(--text-dim);padding:5px 0;font-size:.93rem;transition:.2s}
.footer a:hover{color:var(--primary)}
.footer__brand p{color:var(--text-dim);font-size:.92rem;margin-top:14px;max-width:320px}
.footer__bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:var(--text-mute);font-size:.86rem}
.beian{color:var(--text-dim)}
.beian a{display:inline;color:var(--text-dim)}
.beian a:hover{color:var(--primary)}

/* 评价 */
.review-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;display:flex;flex-direction:column;gap:16px}
.review-card__head{display:flex;gap:14px;align-items:center}
.avatar{width:54px;height:54px;border-radius:50%;flex:0 0 54px;display:grid;place-items:center;font-family:var(--ff-head);font-weight:700;color:#08111c;font-size:1.2rem}
.avatar--a{background:linear-gradient(135deg,var(--primary),var(--gold))}
.avatar--b{background:linear-gradient(135deg,var(--accent),#f6c177)}
.avatar--c{background:linear-gradient(135deg,var(--gold),var(--primary))}
.review-card__name{font-weight:700}
.review-card__meta{font-size:.84rem;color:var(--text-mute)}
.review-card__stars{color:var(--gold);letter-spacing:2px}
.review-card__body{color:var(--text-dim);font-size:.96rem}
.review-tag{display:inline-block;font-size:.78rem;padding:3px 11px;border-radius:999px;border:1px solid var(--border-strong);color:var(--text-dim)}
.review-tag--big{color:var(--primary);border-color:rgba(47,128,237,.4)}
.review-tag--mid{color:var(--accent);border-color:rgba(237,137,54,.4)}
.review-tag--ok{color:var(--gold);border-color:rgba(201,169,110,.4)}

/* FAQ */
.faq-cat{margin-bottom:38px}
.faq-cat__h{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.faq-cat__h .dot{width:10px;height:10px;border-radius:50%;background:var(--accent)}
.faq-cat__h h3{font-size:1.25rem}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--surface)}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:600;display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{color:var(--primary);font-size:1.4rem;transition:.25s;flex:0 0 auto}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item__a{padding:0 22px 20px;color:var(--text-dim);font-size:.97rem}
.faq-item[open]{border-color:var(--border-strong)}

/* 文章列表 */
.post{display:grid;grid-template-columns:220px 1fr;gap:22px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px;transition:.25s;margin-bottom:18px}
.post:hover{border-color:var(--border-strong);transform:translateX(4px)}
.post__thumb{border-radius:12px;overflow:hidden;aspect-ratio:4/3;background:var(--surface-2)}
.post__thumb img{width:100%;height:100%;object-fit:cover}
.post__date{font-size:.82rem;color:var(--accent);font-weight:600;letter-spacing:1px}
.post h3{font-size:1.18rem;margin:6px 0 8px;font-family:var(--ff-body)}
.post p{color:var(--text-dim);font-size:.93rem}
@media(max-width:680px){.post{grid-template-columns:1fr}.post__thumb{max-height:180px}}

/* 文章正文 */
.article{max-width:820px;margin:0 auto}
.article h2{font-size:1.6rem;margin:34px 0 14px}
.article h3{font-size:1.25rem;margin:26px 0 10px}
.article p{color:var(--text-dim);margin-bottom:16px;font-size:1.04rem}
.article ul,.article ol{color:var(--text-dim);margin:0 0 18px 22px}
.article li{margin-bottom:8px}
.article blockquote{border-left:3px solid var(--accent);padding:10px 18px;background:var(--surface);border-radius:0 10px 10px 0;color:var(--text);margin:18px 0;font-family:var(--ff-head)}

/* 联系表单 */
.form{display:grid;gap:16px;max-width:560px}
.form label{font-size:.9rem;color:var(--text-dim);display:block;margin-bottom:6px}
.form input,.form textarea,.form select{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:13px 15px;color:var(--text);font-family:inherit;font-size:.96rem}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,128,237,.16)}
.info-list{display:grid;gap:14px}
.info-list .row{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}
.info-list .row .ic{color:var(--primary);font-size:1.2rem}
.info-list .row b{font-weight:600}
.info-list .row span{color:var(--text-dim);font-size:.93rem}

/* 地图占位 */
.map{height:320px;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);background:linear-gradient(135deg,#10243d,#0a1626);position:relative;display:grid;place-items:center}
.map__pin{text-align:center;color:var(--text-dim)}
.map__pin .big{font-size:2rem}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

/* notice */
.notice{background:rgba(237,137,54,.1);border:1px solid rgba(237,137,54,.3);border-radius:var(--radius);padding:16px 18px;color:#f6c98a;font-size:.92rem;margin:18px 0}

/* 标签云 */
.tagcloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.tagcloud span{font-size:.86rem;color:var(--text-dim);border:1px solid var(--border);padding:6px 14px;border-radius:999px}

/* 工具类 */
.center{text-align:center}
.mt-s{margin-top:18px}.mt-m{margin-top:34px}.mt-l{margin-top:54px}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
@media(max-width:880px){.split{grid-template-columns:1fr;gap:30px}}
.pill{display:inline-flex;gap:8px;align-items:center;font-size:.84rem;color:var(--text-dim);background:var(--surface);border:1px solid var(--border);padding:7px 14px;border-radius:999px}