:root{
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --ink:#0f172a;
  --ink-soft:#475569;
  --muted:#94a3b8;
  --brand:#1d4ed8;
  --brand-dark:#1e3a8a;
  --accent:#f97316;
  --line:#e2e8f0;
  --radius:14px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;font-size:1.35rem;letter-spacing:-.5px}
.brand span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-weight:600;color:var(--ink-soft);font-size:.95rem;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--brand)}
.nav-links a.btn{color:#fff}
.nav-links a.btn:hover{background:var(--brand-dark);color:#fff}
.nav-toggle{display:none;background:none;border:0;font-size:1.5rem;cursor:pointer;color:var(--ink)}

/* Language dropdown */
.lang-dropdown{position:relative;margin-left:14px}
.lang-btn{background:#fff;border:1px solid var(--line);border-radius:20px;padding:6px 12px;font-size:.85rem;cursor:pointer;display:flex;align-items:center;gap:6px;color:var(--ink);white-space:nowrap}
.lang-btn:hover{border-color:var(--brand);color:var(--brand)}
.lang-menu{display:none;position:absolute;right:0;top:118%;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:6px;min-width:190px;max-height:340px;overflow:auto;z-index:60}
.lang-menu.open{display:block}
.lang-menu a{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:8px;color:var(--ink);font-size:.9rem}
.lang-menu a:hover{background:var(--bg-alt)}
.lang-menu a.active{background:var(--brand);color:#fff}
.flag{font-size:1.15rem;line-height:1}

/* Buttons */
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:700;padding:12px 22px;border-radius:10px;transition:transform .15s,background .2s;cursor:pointer;border:0}
.btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-lg{padding:15px 30px;font-size:1.05rem}
.btn-sm{padding:9px 18px;font-size:.9rem}
.btn-ghost{background:transparent;color:var(--brand);border:2px solid var(--brand)}
.btn-ghost:hover{background:var(--brand);color:#fff}

/* Hero */
.hero{background:radial-gradient(1200px 500px at 80% -10%,#dbeafe 0%,transparent 60%),linear-gradient(160deg,#0f172a,#1e3a8a);color:#fff;padding:90px 0 70px}
.hero-img{background-image:linear-gradient(120deg,rgba(13,27,51,.80),rgba(13,27,51,.62)),url('../img/hero.webp');background-size:cover;background-position:center}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.1;font-weight:800;letter-spacing:-1px}
.hero .hl{color:var(--accent)}
.hero .lead{font-size:1.15rem;color:#cbd5e1;max-width:680px;margin:20px 0 30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:50px}
.hero-stats li{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:18px;text-align:center}
.hero-stats strong{display:block;font-size:1.7rem;color:#fff}
.hero-stats span{font-size:.85rem;color:#94a3b8}

/* Sections */
.section{padding:72px 0}
.section-alt{background:var(--bg-alt)}
.section-title{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;text-align:center;letter-spacing:-.5px}
.section-sub{text-align:center;color:var(--ink-soft);margin:10px 0 40px}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-ico{margin-bottom:14px;aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:var(--bg-alt)}
.card-ico img{width:100%;height:100%;object-fit:cover}
.card h3{font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:.95rem}

/* Steps */
.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.step-n{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;background:var(--brand);color:#fff;font-weight:800;border-radius:50%;margin-bottom:12px}
.steps h3{font-size:1.1rem;margin-bottom:6px}
.steps p{color:var(--ink-soft);font-size:.92rem}

/* Features */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature{background:var(--bg-alt);border-radius:var(--radius);padding:24px}
.feature h3{color:var(--brand);margin-bottom:8px}
.feature p{color:var(--ink-soft);font-size:.95rem}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;text-align:center;padding:64px 0}
.cta-band h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800}
.cta-band p{color:#dbeafe;margin:12px 0 26px}

/* Footer */
.site-footer{background:#0f172a;color:#cbd5e1;padding:54px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:30px}
.site-footer .brand{color:#fff;font-size:1.3rem}
.site-footer .brand span{color:#60a5fa}
.site-footer h4{color:#fff;margin-bottom:14px;font-size:1rem}
.site-footer a{display:block;color:#cbd5e1;padding:4px 0;font-size:.92rem}
.site-footer a:hover{color:#fff}
.muted{color:var(--muted);font-size:.9rem}
.footer-company{color:#fff;font-weight:600;font-size:.95rem;margin:2px 0 10px}
.footer-bottom{border-top:1px solid #1e293b;margin-top:36px;padding-top:18px;text-align:center;color:var(--muted);font-size:.85rem}

/* Inner page hero */
.page-hero{background:linear-gradient(160deg,#0f172a,#1e3a8a);color:#fff;padding:64px 0 50px}
.page-hero h1{font-size:clamp(2rem,4vw,2.8rem);font-weight:800}
.page-hero p{color:#cbd5e1;margin-top:10px;max-width:680px}

/* Service detail */
.svc{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;padding:40px 0;border-bottom:1px solid var(--line)}
.svc:last-child{border-bottom:0}
.svc .svc-media{background:var(--bg-alt);border-radius:var(--radius);min-height:260px;overflow:hidden}
.svc-img{width:100%;height:100%;min-height:260px;object-fit:cover;display:block;border-radius:var(--radius)}
.svc h2{font-size:1.5rem;margin-bottom:10px}
.svc h2 .tag{font-size:.8rem;background:var(--brand);color:#fff;padding:3px 10px;border-radius:20px;vertical-align:middle;margin-left:8px}
.svc p{color:var(--ink-soft);margin-bottom:14px}
.svc ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.svc ul li{background:var(--bg-alt);border:1px solid var(--line);border-radius:20px;padding:5px 12px;font-size:.85rem;color:var(--ink-soft)}

/* Gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.g-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s}
.g-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.g-thumb{height:200px;overflow:hidden;background:var(--bg-alt)}
.g-thumb img{width:100%;height:100%;object-fit:cover}
.g-body{padding:16px 18px}
.g-body h3{font-size:1.05rem;margin-bottom:4px}
.g-body p{color:var(--ink-soft);font-size:.88rem}

/* Forms */
.form-wrap{max-width:640px;margin:0 auto}
.form-row{margin-bottom:18px}
.form-row label{display:block;font-weight:600;margin-bottom:6px;font-size:.92rem}
.form-row input,.form-row textarea,.form-row select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:.95rem;font-family:inherit;background:#fff}
.form-row input:focus,.form-row textarea:focus,.form-row select:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.form-row textarea{min-height:120px;resize:vertical}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-note{background:var(--bg-alt);border:1px solid var(--line);border-radius:10px;padding:14px;font-size:.88rem;color:var(--ink-soft);margin-bottom:22px}
.alert{display:none;background:#dcfce7;border:1px solid #86efac;color:#166534;padding:14px 16px;border-radius:10px;margin-bottom:20px;font-weight:600}

/* Table */
.tbl{width:100%;border-collapse:collapse;margin-top:10px}
.tbl th,.tbl td{border:1px solid var(--line);padding:10px 12px;text-align:left;font-size:.92rem}
.tbl th{background:var(--bg-alt);font-weight:700}
.tbl tr:nth-child(even){background:#fafcff}

/* RTL adjustments */
[dir="rtl"] body{direction:rtl}
[dir="rtl"] .nav{flex-direction:row-reverse}
[dir="rtl"] .hero-stats,[dir="rtl"] .card-grid,[dir="rtl"] .steps,[dir="rtl"] .feature-grid,[dir="rtl"] .gallery-grid{direction:rtl}
[dir="rtl"] .lang-menu{right:auto;left:0}
[dir="rtl"] .svc{direction:ltr}
[dir="rtl"] .form-row label{text-align:right}

/* Responsive */
@media (max-width:900px){
  .card-grid,.feature-grid,.gallery-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .svc{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nav-links{position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:10px 20px;display:none}
  [dir="rtl"] .nav-links{flex-direction:column}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .card-grid,.feature-grid,.gallery-grid,.steps,.form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}

/* 订单查询 */
.order-box{max-width:720px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:0 10px 30px rgba(15,23,42,.06);}
.order-search{display:flex;gap:10px;}
.order-search input{flex:1;border:1px solid var(--line);border-radius:10px;padding:13px 14px;font-size:15px;outline:none;min-width:0;}
.order-search input:focus{border-color:var(--brand);}
.order-msg{min-height:22px;margin:14px 0 4px;font-size:14px;color:var(--muted);text-align:center;}
.order-msg.err{color:#b91c1c;}
.order-msg.ok{color:#15803d;}
.ord-card{margin-top:8px;border:1px solid var(--line);border-radius:14px;padding:20px;background:#f8fafc;}
.ord-card h3{font-size:16px;margin-bottom:4px;}
.ord-card .meta{font-size:13px;color:var(--soft);margin-bottom:14px;}
.ord-no{font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--brand);}
.timeline{border-left:2px solid var(--line);padding-left:18px;margin-top:6px;}
.tl-item{position:relative;padding-bottom:16px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{content:"";position:absolute;left:-25px;top:2px;width:14px;height:14px;border-radius:50%;background:#fff;border:2px solid var(--line);}
.tl-item.done::before{background:var(--ok);border-color:var(--ok);}
.tl-item.cur::before{background:var(--brand);border-color:var(--brand);box-shadow:0 0 0 4px rgba(29,78,216,.15);}
.tl-name{font-size:14px;font-weight:600;color:var(--ink);}
.tl-item.pending .tl-name{color:var(--muted);font-weight:400;}
.tl-time{font-size:12px;color:var(--soft);margin-top:2px;}
.ord-note{margin-top:14px;font-size:13px;color:var(--soft);background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px;}
.lbl-sub{color:#94a3b8;font-size:.78em;font-weight:400;margin-left:4px;}

@media (max-width:760px){
  .order-search{flex-direction:column;}
}