:root{
  --bg:#f5f7fb;--card:#fff;--text:#0f172a;--muted:#64748b;--line:#e2e8f0;
  --blue:#2563eb;--green:#10b981;--dark:#0f172a;--shadow:0 18px 48px rgba(15,23,42,.08)
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html.lang-en [data-lang="zh"], html.lang-zh [data-lang="en"]{display:none!important}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.68}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
p{color:var(--muted)}
.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}
.nav{position:sticky;top:0;z-index:10;background:rgba(245,247,251,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(226,232,240,.9)}
.nav-inner{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:22px}
.logo-mark{width:38px;height:38px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,#2563eb,#10b981);color:#fff}
.nav-links{display:flex;gap:20px;align-items:center;font-size:14px;font-weight:700;color:#334155}
.nav-links a.active,.nav-links a:hover,.dropdown-trigger.active{color:var(--blue)}
.dropdown{position:relative}
.dropdown-trigger::after{content:" ▾";font-size:12px;color:#64748b}
.dropdown-menu{position:absolute;left:-12px;top:30px;min-width:220px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s}
.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu a{display:block;padding:10px 12px;border-radius:12px}
.dropdown-menu a:hover,.dropdown-menu a.active{background:#f1f5f9;color:var(--blue)}
.nav-tools{display:flex;align-items:center;gap:12px}
.lang-switch{display:inline-flex;padding:3px;border:1px solid var(--line);border-radius:999px;background:#fff}
.lang-switch button{border:0;background:transparent;padding:7px 10px;border-radius:999px;font-size:12px;font-weight:900;color:#64748b;cursor:pointer}
.lang-switch button.active{background:var(--blue);color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:999px;font-weight:800}
.btn-primary{background:var(--blue);color:#fff}
.btn-outline{background:#fff;border:1px solid var(--line);color:var(--text)}
.hero,.page-hero,.section{padding:84px 0}
.hero{background:
radial-gradient(circle at top left,rgba(37,99,235,.12),transparent 34%),
radial-gradient(circle at bottom right,rgba(16,185,129,.12),transparent 30%)}
.page-hero{padding-top:84px;padding-bottom:56px;background:
radial-gradient(circle at top left,rgba(37,99,235,.10),transparent 34%),
radial-gradient(circle at bottom right,rgba(16,185,129,.08),transparent 30%)}
.section-dark{background:var(--dark);color:#fff}
.section-dark p,.section-dark .lead,.section-dark li{color:#cbd5e1}
.section-dark .card,.section-dark .panel{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.section-dark .card h2,.section-dark .card h3,.section-dark .card h4,.section-dark .panel h2,.section-dark .panel h3,.section-dark .panel h4{color:#fff}
.section-dark .card p,.section-dark .card li,.section-dark .panel p,.section-dark .panel li{color:#cbd5e1}
.section-dark .image-card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.section-dark .btn-outline{color:var(--text)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:#dbeafe;color:#1d4ed8;font-size:13px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px}
.dot{width:8px;height:8px;border-radius:999px;background:var(--green)}
h1{font-size:clamp(40px,5.7vw,72px);line-height:1.05;letter-spacing:-.055em;margin-bottom:20px}
h2{font-size:clamp(30px,4vw,50px);line-height:1.1;letter-spacing:-.045em;margin-bottom:16px}
h3{font-size:24px;line-height:1.25;margin-bottom:10px}
.lead{font-size:20px;max-width:840px;margin-bottom:26px}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}
.grid-2,.grid-3,.grid-4,.hero-grid,.split,.feature-grid,.solutions-grid,.stats{display:grid;gap:24px}
.hero-grid,.split{grid-template-columns:1.08fr .92fr;align-items:center}
.feature-grid{grid-template-columns:1fr 1fr;align-items:center}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.solutions-grid{grid-template-columns:repeat(3,1fr)}
.stats{grid-template-columns:repeat(3,1fr)}
.card,.panel,.solution-card,.faq-item,.price-card{background:var(--card);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow)}
.card h3,.panel h3,.solution-body h3,.price-card h3{letter-spacing:-.02em}
.card p,.panel p,.solution-body p{font-size:15px}
.card,.panel,.price-card{padding:28px}
.image-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}
.image-card img{width:100%}
.hero-actions,.hero-note,.chips,.footer-links,.result-row{display:flex;gap:12px;flex-wrap:wrap}
.check{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;background:#dcfce7;color:#16a34a;font-size:12px;font-weight:900;margin-right:6px}
ul.clean{display:grid;gap:10px;margin-top:12px}
ul.clean li{list-style:none;display:flex;gap:10px;color:#475569}
ul.clean li::before{content:"✓";color:#10b981;font-weight:900}
.section-dark ul.clean li{color:#cbd5e1}
.chip{display:inline-flex;padding:8px 12px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-size:13px;font-weight:900}
.stat-card{padding:24px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.stat-card strong{display:block;font-size:34px;color:var(--blue);letter-spacing:-.05em}
.stat-card span{display:block;font-weight:800;color:#334155;margin:6px 0 8px}
.timeline{display:grid;gap:16px;counter-reset:s}
.timeline-item{position:relative;padding:24px 24px 24px 84px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.timeline-item::before{counter-increment:s;content:counter(s);position:absolute;left:22px;top:24px;width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:900}
.table{border:1px solid var(--line);border-radius:26px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.table-row{display:grid;grid-template-columns:220px 1fr;border-bottom:1px solid var(--line)}
.table-row:last-child{border-bottom:0}
.table-label{background:#f8fafc;padding:20px;font-weight:900}
.table-value{padding:20px;color:var(--muted)}
.workflow-step{display:grid;grid-template-columns:36px 1fr;gap:12px;padding:14px;border:1px solid #edf2f7;background:#f8fafc;border-radius:16px}
.workflow-step b{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:var(--blue);color:#fff}
.workflow-steps{display:grid;gap:12px;margin-top:18px}
.solution-card{overflow:hidden}
.solution-card img{width:100%;height:180px;object-fit:cover;border-bottom:1px solid var(--line)}
.solution-body{padding:22px}
.meta{padding:12px 14px;background:#f8fafc;border:1px solid #eef2f7;border-radius:16px;margin-top:10px}
.meta strong{display:block;font-size:13px;margin-bottom:6px}
.result{display:inline-flex;padding:6px 10px;border-radius:999px;background:#ecfdf5;color:#047857;font-size:12px;font-weight:900}
.price{font-size:44px;line-height:1;font-weight:900;letter-spacing:-.05em;margin:8px 0 14px}
.price span{font-size:16px;color:var(--muted);font-weight:700;letter-spacing:0}
.notice{margin-top:26px;padding:26px;border-radius:24px;background:#fff7ed;border:1px solid #fed7aa}
details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px;box-shadow:var(--shadow);margin-bottom:14px}
summary{cursor:pointer;list-style:none;font-weight:900;font-size:17px;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:24px;color:var(--blue);line-height:1}
details[open] summary::after{content:"−"}
details p{margin-top:10px}
.cta{padding:46px;border-radius:30px;background:linear-gradient(135deg,#2563eb,#0f766e);color:#fff;box-shadow:var(--shadow)}
.cta p{color:rgba(255,255,255,.85)}
.footer{padding:36px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media (max-width:1100px){.nav-links{display:none}.hero-grid,.split,.feature-grid,.grid-2,.grid-3,.grid-4,.solutions-grid,.stats{grid-template-columns:1fr}.table-row{grid-template-columns:1fr}}
@media (max-width:560px){.wrap{width:min(100% - 28px,1180px)}.nav .btn{display:none}.timeline-item{padding-left:22px;padding-top:78px}}


/* v3 final fixed additions */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
.review-head{display:flex;justify-content:space-between;gap:12px;margin-bottom:12px;align-items:center}
.stars{color:#f59e0b;letter-spacing:2px;font-size:15px;white-space:nowrap}
.review-tag{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-size:12px;font-weight:900;margin-top:12px}
.solution-card img{height:210px;object-fit:cover}
.faq-columns{max-width:900px;margin:0 auto}
.faq-columns details{break-inside:auto}
.process-clean{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.process-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:30px;box-shadow:var(--shadow)}
.process-list{display:grid;gap:14px;margin-top:22px;counter-reset:p}
.process-list li{list-style:none;position:relative;padding:16px 16px 16px 58px;background:#f8fafc;border:1px solid #edf2f7;border-radius:18px;color:#334155;font-weight:700}
.process-list li::before{counter-increment:p;content:counter(p);position:absolute;left:16px;top:14px;width:30px;height:30px;border-radius:10px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.append-solution{background:linear-gradient(135deg,#eff6ff,#ecfdf5);border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:var(--shadow);margin-bottom:28px}
@media(max-width:1100px){.scene-grid,.about-grid,.review-grid,.process-clean{grid-template-columns:1fr}}

.real-photo-card{position:relative;min-height:210px;background-size:cover;background-position:center;border-bottom:1px solid var(--line)}
.real-photo-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.08),rgba(15,23,42,.55))}
.real-photo-label{position:absolute;left:18px;right:18px;bottom:18px;z-index:1;color:#fff}
.real-photo-label strong{display:block;font-size:22px;line-height:1.1;margin-bottom:6px;text-shadow:0 2px 10px rgba(0,0,0,.28)}
.real-photo-label span{display:block;font-size:13px;line-height:1.35;color:rgba(255,255,255,.88)}

/* v5 nav + local scene image fixes */
.nav-links a{white-space:nowrap}
.dropdown-trigger{white-space:nowrap}
.local-scene-img{width:100%;height:230px;object-fit:cover;border-bottom:1px solid var(--line);background:#f8fafc}
.solution-card img.local-scene-img{height:230px;object-fit:cover}
.faq-columns{max-width:920px;margin:0 auto;columns:1!important;column-gap:0!important}


/* v6 visibility fixes */
.card,.panel,.solution-card,.price-card,.faq-item{color:var(--text)}
.card h2,.card h3,.card h4,.panel h2,.panel h3,.panel h4,.solution-card h2,.solution-card h3,.solution-card h4,.price-card h2,.price-card h3,.price-card h4{color:var(--text)}
.card p,.panel p,.solution-card p,.price-card p,.faq-item p,.card li,.panel li,.solution-card li,.price-card li,.faq-item li{color:var(--muted)}
.section-dark .card,.section-dark .panel,.section-dark .solution-card,.section-dark .price-card,.section-dark .faq-item{background:#fff;border-color:var(--line);color:var(--text)}
.section-dark .card h2,.section-dark .card h3,.section-dark .card h4,
.section-dark .panel h2,.section-dark .panel h3,.section-dark .panel h4,
.section-dark .solution-card h2,.section-dark .solution-card h3,.section-dark .solution-card h4,
.section-dark .price-card h2,.section-dark .price-card h3,.section-dark .price-card h4,
.section-dark .faq-item h2,.section-dark .faq-item h3,.section-dark .faq-item h4{color:var(--text)!important}
.section-dark .card p,.section-dark .panel p,.section-dark .solution-card p,.section-dark .price-card p,.section-dark .faq-item p,
.section-dark .card li,.section-dark .panel li,.section-dark .solution-card li,.section-dark .price-card li,.section-dark .faq-item li{color:var(--muted)!important}
.local-photo-img{width:100%;height:230px;object-fit:cover;border-bottom:1px solid var(--line);display:block}


/* v7 final visibility & scene-image fixes */
.products-cta-light{background:linear-gradient(135deg,#f8fbff,#f3faf7);border:1px solid var(--line);border-radius:30px;padding:32px;box-shadow:var(--shadow)}
.products-cta-light h2,.products-cta-light h3,.products-cta-light h4{color:var(--text)!important}
.products-cta-light p,.products-cta-light li,.products-cta-light span{color:var(--muted)!important}
.products-cta-light .card{background:#fff;border-color:var(--line)}
.local-photo-img{width:100%;height:250px;object-fit:cover;display:block;border-bottom:1px solid var(--line);background:#f8fafc}
.solution-card .solution-body p{margin-top:6px}
.solution-card{overflow:hidden}


/* v8 real-photo link patch */
.local-photo-img{width:100%;height:250px;object-fit:cover;display:block;border-bottom:1px solid var(--line);background:#f8fafc}
.solution-card .solution-body h3{margin-bottom:8px}
.solution-card .solution-body p{margin-top:4px}


/* v9 actual fixes */
.products-cta-light{background:linear-gradient(135deg,#f8fbff,#f3faf7);border:1px solid var(--line);border-radius:30px;padding:32px;box-shadow:var(--shadow)}
.products-cta-light h2,.products-cta-light h3,.products-cta-light h4{color:#0f172a!important}
.products-cta-light p,.products-cta-light li,.products-cta-light span{color:#334155!important}
.products-cta-light .card{background:#fff;border-color:var(--line)}
.real-object-photo{width:100%;height:260px;object-fit:cover;display:block;border-bottom:1px solid var(--line);background:#f8fafc}
.solution-card .solution-body h3{color:#0f172a!important}
.solution-card .solution-body p{color:#64748b!important;margin-top:6px}
.local-photo-img{width:100%;height:260px;object-fit:cover;display:block;border-bottom:1px solid var(--line);background:#f8fafc}


/* v10 logo and CTA update */
.logo{display:flex;align-items:center;gap:12px;font-weight:900;font-size:22px}
.logo-icon{width:44px;height:44px;display:block;flex:0 0 44px}
.logo-word{font-weight:900;font-size:22px;letter-spacing:-0.02em;color:#0f172a}
.btn-primary{background:linear-gradient(135deg,#2563eb,#10b981);color:#fff;box-shadow:0 10px 26px rgba(37,99,235,.22)}
.btn-primary:hover{transform:translateY(-1px)}


/* v11 search-data logo update */
.logo{display:flex;align-items:center;gap:12px;font-weight:900;font-size:22px}
.logo-icon{width:48px;height:48px;display:block;flex:0 0 48px}
.logo-word{font-weight:900;font-size:22px;letter-spacing:-0.02em;color:#0f172a}
.btn-primary{background:linear-gradient(135deg,#2563eb,#10b981);color:#fff;box-shadow:0 10px 26px rgba(37,99,235,.22)}


/* v13 DataGive uploaded logo */
.logo-icon{
  width:48px!important;
  height:48px!important;
  border-radius:14px;
  object-fit:cover;
  box-shadow:0 8px 20px rgba(15,23,42,.14);
  display:block;
  flex:0 0 48px;
}
.logo-word{font-weight:900;font-size:22px;letter-spacing:-0.02em;color:#0f172a}