/* ====== 九畴数智 · 前台样式 ====== */
:root{
  --primary:#ea580c;
  --primary-dark:#c2410c;
  --primary-light:#f97316;
  --accent:#dc2626;
  --ink:#0f172a;
  --body:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --bg-soft2:#f1f5f9;
  --radius:16px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --shadow-lg:0 20px 50px rgba(15,23,42,.12);
  --container:1180px;
  --nav-height:112px;
  --logo-height:86px;
  --logo-max-width:560px;
  --stat-border:#fed7aa;
  --stat-bg:#fffbf7;
  --stat-num:#fb923c;
  --stat-lbl:#94a3b8;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--body);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;margin:0}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section--soft{background:var(--bg-soft)}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 26px;border-radius:999px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.25s;white-space:nowrap;
}
.btn--primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 8px 20px rgba(234,88,12,.32)}
.btn--primary:hover{transform:translateY(-2px);color:#fff;box-shadow:0 12px 26px rgba(234,88,12,.42)}
.btn--ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.4)}
.btn--ghost:hover{background:rgba(255,255,255,.22);color:#fff}
.btn--outline{background:#fff;color:var(--primary);border-color:var(--line)}
.btn--outline:hover{border-color:var(--primary);color:var(--primary)}

/* ====== 顶部导航 ====== */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--nav-height);gap:12px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;color:var(--ink);flex:0 0 auto}
.brand--header{gap:0;max-width:min(560px,46vw)}
.brand .logo{width:64px;height:64px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:30px;font-weight:800;flex-shrink:0}
.brand .logo-img{display:block;height:var(--logo-height);width:auto;max-width:var(--logo-max-width);object-fit:contain;object-position:left center;flex-shrink:0}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:2px}
.nav-menu{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;flex:1 1 auto;justify-content:center;min-width:0}
.nav-menu a{padding:8px 12px;border-radius:10px;font-weight:500;font-size:15px;color:var(--body);white-space:nowrap}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary);background:var(--bg-soft2)}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-phone{font-weight:700;color:var(--primary);font-size:14px;white-space:nowrap}
.nav-cta .btn--primary{padding:10px 18px;font-size:14px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;font-size:26px;color:var(--ink)}

/* ====== 通用区块标题 ====== */
.sec-head{text-align:center;max-width:720px;margin:0 auto 56px}
.sec-tag{display:inline-block;color:var(--primary);font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase;margin-bottom:14px}
.sec-title{font-size:36px;font-weight:800;margin-bottom:16px}
.sec-sub{color:var(--muted);font-size:17px}

/* ====== 首页 Hero ====== */
.hero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(135deg,#0f172a 0%,#7c2d12 60%,#ea580c 100%)}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(249,115,22,.5),transparent 45%),radial-gradient(circle at 15% 80%,rgba(220,38,38,.4),transparent 42%)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:96px 0}
.hero h1{color:#fff;font-size:48px;font-weight:800;line-height:1.2;margin-bottom:22px}
.hero h1 .hl{background:linear-gradient(90deg,#fbbf24,#fb923c);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:19px;color:rgba(255,255,255,.85);margin-bottom:32px;max-width:520px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:46px;flex-wrap:wrap}
.hero-stats .num{font-size:34px;font-weight:800;color:#fff}
.hero-stats .lbl{font-size:14px;color:rgba(255,255,255,.7)}
.hero-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:24px;padding:30px;backdrop-filter:blur(6px)}
.hero-card .row{display:flex;align-items:center;gap:14px;padding:16px;border-radius:14px;background:rgba(255,255,255,.08);margin-bottom:14px}
.hero-card .row:last-child{margin-bottom:0}
.hero-card .ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,#fbbf24,#ea580c);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.hero-card .row b{color:#fff;display:block;font-size:16px}
.hero-card .row span{color:rgba(255,255,255,.7);font-size:13px}

/* 居中式 Hero（贴近旧版） */
.hero-center{position:relative;z-index:2;text-align:center;max-width:860px;margin:0 auto;padding:104px 0}
.hero-tag{display:inline-block;padding:8px 20px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);color:#fff;font-weight:600;letter-spacing:2px;font-size:14px;margin-bottom:26px}
.hero-center h1{color:#fff;font-size:50px;font-weight:800;line-height:1.2;margin-bottom:14px}
.hero-en{color:rgba(255,255,255,.7);letter-spacing:3px;font-size:15px;text-transform:uppercase;margin-bottom:24px}
.hero-center p{color:rgba(255,255,255,.88);font-size:18px;max-width:680px;margin:0 auto 34px}
.hero-center .hero-actions{justify-content:center}

/* ====== 首页轮播（1920×600 / 3.2:1） ====== */
.hero-carousel{
  position:relative;width:100%;aspect-ratio:32/10;
  min-height:280px;max-height:600px;overflow:hidden;background:#0f172a;
}
.hero-carousel__track{position:relative;width:100%;height:100%}
.hero-carousel__slide{
  position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity .55s ease,visibility .55s;
}
.hero-carousel__slide.is-active{opacity:1;visibility:visible;z-index:1}
.hero-carousel__link{display:block;width:100%;height:100%;color:#fff}
.hero-carousel__slide img{width:100%;height:100%;object-fit:cover;display:block}
.hero-carousel__overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,23,42,.15) 0%,rgba(15,23,42,.45) 100%);
  pointer-events:none;
}
.hero-carousel__caption{
  position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:24px;pointer-events:none;
}
.hero-carousel__caption h1{color:#fff;font-size:46px;font-weight:800;line-height:1.2;margin:0 0 14px;text-shadow:0 2px 18px rgba(0,0,0,.35)}
.hero-carousel__caption p{color:rgba(255,255,255,.92);font-size:18px;max-width:720px;margin:0;text-shadow:0 1px 10px rgba(0,0,0,.3)}
.hero-carousel__nav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:3;
  width:44px;height:44px;border:0;border-radius:999px;
  background:rgba(255,255,255,.18);color:#fff;font-size:28px;line-height:1;
  cursor:pointer;backdrop-filter:blur(4px);transition:.2s;
}
.hero-carousel__nav:hover{background:rgba(255,255,255,.32)}
.hero-carousel__nav--prev{left:18px}
.hero-carousel__nav--next{right:18px}
.hero-carousel__dots{
  position:absolute;left:0;right:0;bottom:18px;z-index:3;
  display:flex;justify-content:center;gap:10px;
}
.hero-carousel__dot{
  width:10px;height:10px;border:0;border-radius:999px;padding:0;
  background:rgba(255,255,255,.45);cursor:pointer;transition:.2s;
}
.hero-carousel__dot.is-active{background:#fff;transform:scale(1.15)}

/* 封面图（800×500 / 16:10） */
.cover-img{
  aspect-ratio:16/10;width:100%;border-radius:var(--radius);
  overflow:hidden;margin-bottom:28px;background:linear-gradient(135deg,#ffedd5,#fff7ed);
}
.cover-img img{width:100%;height:100%;object-fit:cover;display:block}

/* 产品块（带核心功能列表，贴近旧版） */
.product-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.3s;display:flex;flex-direction:column;gap:18px}
.product-block:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.product-head{display:flex;gap:16px;align-items:flex-start}
.product-ic{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;flex-shrink:0}
.product-head h3{font-size:20px;margin-bottom:6px}
.product-head p{color:var(--muted);font-size:14px;margin:0}
.product-feats{border-top:1px dashed var(--line);padding-top:16px}
.feats-label{display:block;font-weight:700;color:var(--ink);font-size:14px;margin-bottom:10px}

/* ====== 卡片网格 ====== */
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card-img{aspect-ratio:16/10;background:linear-gradient(135deg,#ffedd5,#fff7ed);overflow:hidden;position:relative}
.card-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-img .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--primary-light);font-size:40px;font-weight:800;opacity:.4}
.card-body{padding:24px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:19px;margin-bottom:10px}
.card-body p{color:var(--muted);font-size:14px;flex:1;margin:0 0 16px}
.card-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}
.badge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;background:#fff7ed;color:var(--primary)}
.tag{display:inline-block;padding:4px 12px;border-radius:8px;font-size:12px;background:var(--bg-soft2);color:var(--body);margin:0 6px 6px 0}
.more-link{color:var(--primary);font-weight:600;font-size:14px}

/* ====== 服务图标卡 ====== */
.service-card{text-align:left;padding:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.3s}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.service-card .ic{width:58px;height:58px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.service-card h3{font-size:20px;margin-bottom:12px}
.service-card p{color:var(--muted);font-size:14px;margin-bottom:16px}

/* ====== 内页 banner ====== */
.page-hero{background:linear-gradient(135deg,#0f172a,#7c2d12 70%,#c2410c);color:#fff;padding:72px 0;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 85% 30%,rgba(249,115,22,.45),transparent 42%)}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:40px;font-weight:800;margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.82);font-size:17px;margin:0}
.crumb{font-size:14px;color:rgba(255,255,255,.7);margin-bottom:18px}
.crumb a:hover{color:#fff}

/* ====== 关于页 ====== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.stats-strip{
  display:grid;grid-template-columns:repeat(2,1fr);
  border:1px solid var(--stat-border);border-radius:16px;overflow:hidden;
  text-align:center;background:var(--stat-bg);
  box-shadow:0 4px 24px rgba(251,146,60,.08);
}
.stats-strip .stat-item{
  padding:36px 24px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  border-right:1px solid var(--stat-border);border-bottom:1px solid var(--stat-border);
  min-height:130px;background:rgba(255,255,255,.55);
  transition:background .25s;
}
.stats-strip .stat-item:nth-child(2n){border-right:0}
.stats-strip .stat-item:nth-child(n+3){border-bottom:0}
.stats-strip .stat-item:hover{background:rgba(255,247,237,.9)}
.stats-strip .num{
  font-size:42px;font-weight:700;line-height:1.1;
  background:linear-gradient(135deg,#fdba74,#fb923c);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stats-strip .lbl{color:var(--stat-lbl);font-size:15px;margin-top:10px;font-weight:400;letter-spacing:.02em}
.value-card{padding:28px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);height:100%}
.value-card .ic{width:52px;height:52px;border-radius:14px;background:#fff7ed;color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.value-card h3{font-size:18px;margin-bottom:10px}
.value-card p{color:var(--muted);font-size:14px;margin:0}

/* ====== 富文本正文 ====== */
.prose{font-size:16px;color:var(--body);line-height:1.9;max-width:820px}
.prose h2{font-size:26px;margin:32px 0 14px}
.prose h3{font-size:21px;margin:26px 0 12px}
.prose p{margin:0 0 16px}
.prose img{border-radius:12px;margin:18px 0}
.prose ul,.prose ol{padding-left:22px;margin:0 0 16px}
.prose a{color:var(--primary);text-decoration:underline}
.prose blockquote{border-left:4px solid var(--primary);background:var(--bg-soft);margin:18px 0;padding:12px 20px;color:var(--muted)}

/* ====== 详情布局 ====== */
.detail{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:start}
.detail-main{min-width:0}
.detail-side{position:sticky;top:96px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:24px}
.side-box h4{font-size:16px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list a{display:block;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--body)}
.side-list a:last-child{border-bottom:0}
.article-meta{display:flex;gap:18px;color:var(--muted);font-size:14px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line);font-size:14px}

/* ====== 联系页 ====== */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:start}
.info-card{display:flex;gap:16px;padding:20px;border:1px solid var(--line);border-radius:14px;margin-bottom:16px;background:#fff}
.info-card .ic{width:48px;height:48px;border-radius:12px;background:#fff7ed;color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.info-card b{display:block;color:var(--ink)}
.info-card span{color:var(--muted);font-size:14px}
.form-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;font-size:14px;margin-bottom:8px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;transition:.2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(234,88,12,.15)}
.alert{padding:14px 18px;border-radius:10px;margin-bottom:20px;font-size:14px}
.alert--ok{background:#dcfce7;color:#166534}

/* ====== FAQ ====== */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin-bottom:14px}
.faq-item summary{font-weight:600;cursor:pointer;color:var(--ink);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open]{box-shadow:var(--shadow)}
.faq-item p{color:var(--muted);margin:14px 0 0;font-size:14px}

/* ====== CTA 区 ====== */
.cta{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;border-radius:24px;padding:56px;text-align:center;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(234,88,12,.4),transparent 45%)}
.cta>*{position:relative;z-index:2}
.cta h2{color:#fff;font-size:32px;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.85);margin-bottom:28px}

/* ====== 页脚 ====== */
.site-footer{background:#0f172a;color:#94a3b8;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:44px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:20px}
.site-footer .brand{color:#fff;margin-bottom:18px}
.site-footer .brand small{color:#64748b}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:12px}
.footer-links a{color:#94a3b8;font-size:14px}
.footer-links a:hover{color:#fff}
.footer-about{font-size:14px;color:#94a3b8;max-width:320px}
.footer-contact li{display:flex;gap:10px;margin-bottom:12px;font-size:14px}
.footer-bottom{border-top:1px solid #1e293b;padding-top:24px;text-align:center;font-size:13px;color:#64748b}
.footer-bottom a{color:#94a3b8}

/* ====== 响应式 ====== */
@media (max-width:960px){
  :root{--nav-height:100px;--logo-height:72px;--logo-max-width:420px}
  .nav-phone{display:none}
  .nav-menu a{padding:8px 10px;font-size:14px}
  .hero-inner{grid-template-columns:1fr;padding:64px 0}
  .hero h1,.hero-center h1{font-size:36px}
  .hero-center{padding:72px 0}
  .about-grid,.contact-grid,.detail{grid-template-columns:1fr}
  .detail-side{position:static}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  :root{--nav-height:88px;--logo-height:58px;--logo-max-width:min(320px,78vw)}
  .brand--header{max-width:78vw}
  .section{padding:56px 0}
  .sec-title{font-size:28px}
  .hero h1,.hero-center h1{font-size:30px}
  .hero-center{padding:56px 0}
  .hero-carousel{min-height:220px;max-height:420px}
  .hero-carousel__caption h1{font-size:28px}
  .hero-carousel__caption p{font-size:15px}
  .hero-carousel__nav{width:36px;height:36px;font-size:22px}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-menu{
    position:fixed;top:var(--nav-height);left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:12px;gap:2px;
    transform:translateY(-150%);transition:.3s;box-shadow:var(--shadow);
  }
  .nav-menu.open{transform:translateY(0)}
  .nav-toggle{display:block}
  .nav-phone{display:none}
  .cta{padding:36px 24px}
  .stats-strip .stat-item{padding:24px 12px;min-height:96px}
  .stats-strip .num{font-size:32px}
}