/* ==========================================================================
   星耀国际官网 style.css
   Global Real Estate Research Lab / City Comparison / Property Data Terminal
   ========================================================================== */

:root{
  --c-bg:#f7f5f0;
  --c-bg-alt:#f0ede4;
  --c-surface:#ffffff;
  --c-surface-soft:#faf9f6;
  --c-border:#e2ddd0;
  --c-border-strong:#cfc8b6;

  --c-navy:#12283f;
  --c-navy-soft:#1c3a57;
  --c-green:#1f3d34;
  --c-green-soft:#2c5449;
  --c-cyan:#0e7a8c;
  --c-cyan-soft:#e3f2f4;
  --c-gray:#5a5f66;
  --c-gray-soft:#8a8f96;
  --c-gold:#a9822f;
  --c-gold-soft:#f3e8d2;

  --c-text:#1c2126;
  --c-text-soft:#4a5058;
  --c-text-faint:#767c84;
  --c-link:#0e5f77;

  --radius-s:4px;
  --radius-m:10px;
  --radius-l:18px;

  --shadow-s:0 1px 2px rgba(18,40,63,.06);
  --shadow-m:0 6px 24px rgba(18,40,63,.08);

  --maxw:1180px;
  --font-base:"Noto Sans SC","PingFang SC","Microsoft YaHei","Segoe UI",-apple-system,BlinkMacSystemFont,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-base);
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-link);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{
  font-weight:700;
  color:var(--c-navy);
  line-height:1.35;
  margin:0 0 .6em;
}
h1{font-size:1.9rem;}
h2{font-size:1.5rem;}
h3{font-size:1.18rem;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.3em;}
li{margin-bottom:.4em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
section{padding:56px 0;}
.section-alt{background:var(--c-bg-alt);}
.section-surface{background:var(--c-surface);}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--c-navy);color:#fff;
  padding:10px 16px;z-index:999;border-radius:0 0 var(--radius-s) 0;
}
.skip-link:focus{left:0;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(247,245,240,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--c-border);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;
  height:68px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--c-navy);font-size:1.15rem;}
.brand img{width:36px;height:36px;}
.brand:hover{text-decoration:none;}
.brand .brand-sub{display:block;font-size:.68rem;font-weight:400;color:var(--c-text-faint);letter-spacing:.03em;}

.main-nav{display:flex;gap:2px;}
.main-nav a{
  padding:10px 14px;border-radius:var(--radius-s);
  color:var(--c-text-soft);font-size:.95rem;font-weight:500;white-space:nowrap;
}
.main-nav a:hover,.main-nav a[aria-current="page"]{
  background:var(--c-navy);color:#fff;text-decoration:none;
}
.nav-toggle{
  display:none;background:none;border:1px solid var(--c-border-strong);border-radius:var(--radius-s);
  width:42px;height:42px;cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:10px;right:10px;height:2px;background:var(--c-navy);
}
.nav-toggle span{top:20px;}
.nav-toggle span::before{top:-7px;}
.nav-toggle span::after{top:7px;}

/* ---------- hero ---------- */
.hero{
  padding:64px 0 48px;
  background:
    radial-gradient(circle at 82% 12%, rgba(14,122,140,.10), transparent 55%),
    linear-gradient(180deg,#eef0e9,var(--c-bg));
  border-bottom:1px solid var(--c-border);
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--c-surface);border:1px solid var(--c-border-strong);
  padding:6px 14px;border-radius:999px;font-size:.82rem;color:var(--c-cyan);font-weight:600;
  margin-bottom:18px;
}
.hero h1{font-size:2.15rem;margin-bottom:.5em;}
.hero-lead{font-size:1.05rem;color:var(--c-text-soft);max-width:56ch;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px;}
.hero-figure{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-l);padding:18px;box-shadow:var(--shadow-m);}
.hero-figure figcaption{font-size:.82rem;color:var(--c-text-faint);text-align:center;margin-top:10px;}
.page-hero{padding:46px 0 38px;}
.page-hero h1{font-size:1.85rem;}
.breadcrumb{font-size:.82rem;color:var(--c-text-faint);margin-bottom:14px;}
.breadcrumb a{color:var(--c-text-faint);}
.breadcrumb .sep{margin:0 6px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-s);
  font-weight:600;font-size:.92rem;border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--c-navy);color:#fff;}
.btn-primary:hover{background:var(--c-navy-soft);text-decoration:none;}
.btn-outline{background:transparent;border-color:var(--c-border-strong);color:var(--c-navy);}
.btn-outline:hover{border-color:var(--c-navy);text-decoration:none;}
.btn-gold{background:var(--c-gold);color:#fff;}
.btn-gold:hover{background:#8f6c26;text-decoration:none;}

/* ---------- section headings ---------- */
.section-head{max-width:760px;margin:0 auto 34px;text-align:center;}
.section-head.align-left{margin:0 0 30px;text-align:left;}
.eyebrow{
  display:inline-block;color:var(--c-cyan);font-weight:700;font-size:.8rem;
  letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px;
}
.section-lead{color:var(--c-text-soft);}

/* ---------- data chain ---------- */
.chain{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;align-items:center;
  margin:28px 0;
}
.chain-node{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-s);
  padding:9px 14px;font-size:.88rem;font-weight:600;color:var(--c-navy);
}
.chain-arrow{color:var(--c-gray-soft);font-size:1rem;}

/* ---------- feature article blocks (首页8篇) ---------- */
.lead-articles{display:flex;flex-direction:column;gap:44px;}
.lead-article{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-l);
  padding:30px;box-shadow:var(--shadow-s);
}
.lead-article.reverse{grid-template-columns:1.1fr .9fr;}
.lead-article.reverse .lead-art-media{order:2;}
.lead-art-media{
  background:var(--c-surface-soft);border:1px solid var(--c-border);border-radius:var(--radius-m);
  padding:16px;display:flex;flex-direction:column;justify-content:center;
}
.lead-art-media figcaption{font-size:.78rem;color:var(--c-text-faint);margin-top:10px;text-align:center;}
.lead-art-meta{display:flex;gap:10px;align-items:center;font-size:.8rem;color:var(--c-text-faint);margin-bottom:10px;flex-wrap:wrap;}
.tag{
  background:var(--c-cyan-soft);color:var(--c-cyan);border-radius:999px;padding:3px 11px;font-weight:700;font-size:.74rem;
}
.tag-gold{background:var(--c-gold-soft);color:var(--c-gold);}
.tag-navy{background:#e7ecf1;color:var(--c-navy);}
.lead-article h2{font-size:1.28rem;}
.lead-article .body-text p{margin-bottom:1em;}
.article-index{
  font-family:var(--font-mono);font-size:.78rem;color:var(--c-gray-soft);
  display:inline-block;margin-bottom:8px;
}

/* ---------- observation cards (官网观察) ---------- */
.observe-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.observe-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-m);
  padding:24px;box-shadow:var(--shadow-s);
}
.observe-card h3{font-size:1.04rem;}
.observe-card .body-text{color:var(--c-text-soft);font-size:.95rem;}

/* ---------- generic content cards / grids ---------- */
.card-grid{display:grid;gap:20px;}
.card-grid.cols-2{grid-template-columns:repeat(2,1fr);}
.card-grid.cols-3{grid-template-columns:repeat(3,1fr);}
.card-grid.cols-4{grid-template-columns:repeat(4,1fr);}
.info-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-s);
}
.info-card img{width:44px;height:44px;margin-bottom:12px;}
.info-card h3{font-size:1.02rem;margin-bottom:.4em;}
.info-card p{color:var(--c-text-soft);font-size:.92rem;margin-bottom:0;}

/* ---------- article list (二级页面文章摘要) ---------- */
.article-list{display:flex;flex-direction:column;gap:20px;}
.article-summary{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-m);
  padding:24px;box-shadow:var(--shadow-s);
}
.article-summary h3{font-size:1.08rem;margin-bottom:.5em;}
.article-summary .body-text{color:var(--c-text-soft);}
.article-summary .lead-art-meta{margin-bottom:12px;}

/* ---------- full article on subpages ---------- */
.full-article{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-l);
  padding:32px;box-shadow:var(--shadow-s);margin-bottom:28px;
}
.full-article h2{border-bottom:2px solid var(--c-border);padding-bottom:14px;}
.full-article h3{margin-top:1.4em;color:var(--c-green-soft);}
.callout{
  border-left:3px solid var(--c-cyan);background:var(--c-cyan-soft);
  padding:14px 18px;border-radius:0 var(--radius-s) var(--radius-s) 0;margin:1.2em 0;font-size:.94rem;
}
.callout.gold{border-color:var(--c-gold);background:var(--c-gold-soft);}

/* ---------- diagrams ---------- */
.diagram-block{
  background:var(--c-surface-soft);border:1px solid var(--c-border);border-radius:var(--radius-m);
  padding:22px;margin:1.4em 0;text-align:center;
}
.diagram-block figcaption{font-size:.82rem;color:var(--c-text-faint);margin-top:10px;}

/* ---------- funnel (interactive) ---------- */
.funnel-widget{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-l);
  padding:26px;box-shadow:var(--shadow-s);
}
.funnel-controls{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px;}
.funnel-controls label{font-size:.86rem;color:var(--c-text-soft);display:flex;flex-direction:column;gap:6px;}
.funnel-controls input{
  border:1px solid var(--c-border-strong);border-radius:var(--radius-s);padding:8px 10px;width:130px;font-size:.9rem;
}
.funnel-steps{display:flex;flex-direction:column;gap:8px;}
.funnel-step{
  display:grid;grid-template-columns:170px 1fr 110px;align-items:center;gap:12px;font-size:.88rem;
}
.funnel-step .bar-track{background:var(--c-bg-alt);border-radius:var(--radius-s);height:26px;overflow:hidden;}
.funnel-step .bar-fill{height:100%;background:linear-gradient(90deg,var(--c-cyan),var(--c-green-soft));border-radius:var(--radius-s);transition:width .3s ease;}
.funnel-step .val{text-align:right;font-family:var(--font-mono);color:var(--c-navy);font-weight:700;}
.funnel-note{font-size:.8rem;color:var(--c-text-faint);margin-top:14px;}

/* ---------- toggle switch (nominal/real) ---------- */
.toggle-switch{display:inline-flex;border:1px solid var(--c-border-strong);border-radius:999px;padding:3px;background:var(--c-surface);}
.toggle-switch button{
  border:none;background:transparent;padding:8px 18px;border-radius:999px;font-size:.86rem;font-weight:600;
  color:var(--c-text-soft);cursor:pointer;
}
.toggle-switch button[aria-pressed="true"]{background:var(--c-navy);color:#fff;}

/* ---------- comparison matrix (city) ---------- */
.matrix-wrap{overflow-x:auto;border:1px solid var(--c-border);border-radius:var(--radius-m);background:var(--c-surface);}
table.matrix{width:100%;border-collapse:collapse;min-width:640px;font-size:.9rem;}
table.matrix caption{text-align:left;padding:16px 18px 0;font-size:.85rem;color:var(--c-text-faint);}
table.matrix th,table.matrix td{padding:12px 16px;border-bottom:1px solid var(--c-border);text-align:left;}
table.matrix thead th{background:var(--c-bg-alt);color:var(--c-navy);position:sticky;top:0;}
table.matrix tbody tr:hover{background:var(--c-surface-soft);}
table.matrix td.num{font-family:var(--font-mono);}

/* ---------- office quality ladder ---------- */
.ladder{display:flex;flex-direction:column;gap:10px;}
.ladder-row{
  display:grid;grid-template-columns:140px 1fr 90px 90px;gap:14px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-s);padding:12px 16px;font-size:.88rem;
}
.ladder-row.head{background:var(--c-bg-alt);font-weight:700;color:var(--c-navy);}
.ladder-bar{background:var(--c-bg-alt);border-radius:var(--radius-s);height:18px;overflow:hidden;}
.ladder-bar span{display:block;height:100%;background:var(--c-green-soft);}

/* ---------- site selection timeline (data center) ---------- */
.site-flow{display:flex;flex-direction:column;gap:0;}
.site-flow-step{
  display:grid;grid-template-columns:34px 1fr;gap:14px;padding:14px 0;position:relative;
}
.site-flow-step::before{
  content:"";position:absolute;left:16px;top:44px;bottom:-14px;width:2px;background:var(--c-border-strong);
}
.site-flow-step:last-child::before{display:none;}
.site-flow-num{
  width:34px;height:34px;border-radius:50%;background:var(--c-navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;z-index:1;
}
.site-flow-body h4{margin:0 0 .3em;font-size:.98rem;color:var(--c-navy);}
.site-flow-body p{margin:0;color:var(--c-text-soft);font-size:.9rem;}

/* ---------- AVM confidence widget ---------- */
.confidence-widget{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-l);padding:26px;box-shadow:var(--shadow-s);}
.confidence-range{
  background:var(--c-bg-alt);border-radius:var(--radius-s);height:14px;position:relative;margin:18px 0 8px;
}
.confidence-range .band{position:absolute;top:0;bottom:0;background:linear-gradient(90deg,var(--c-cyan-soft),var(--c-cyan));border-radius:var(--radius-s);}
.confidence-range .marker{position:absolute;top:-6px;width:2px;height:26px;background:var(--c-gold);}
.confidence-labels{display:flex;justify-content:space-between;font-size:.78rem;color:var(--c-text-faint);}
.confidence-badges{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap;}
.badge{padding:6px 14px;border-radius:999px;font-size:.8rem;font-weight:700;border:1px solid transparent;}
.badge.high{background:#e3f2e6;color:#1f7a3f;}
.badge.medium{background:var(--c-gold-soft);color:var(--c-gold);}
.badge.low{background:#f6e2df;color:#a3402c;}
.badge.active{outline:2px solid currentColor;}

/* ---------- assistant chat mock ---------- */
.assistant-panel{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-l);box-shadow:var(--shadow-m);overflow:hidden;}
.assistant-head{background:var(--c-navy);color:#fff;padding:14px 20px;display:flex;align-items:center;gap:10px;font-weight:700;}
.assistant-head img{width:26px;height:26px;}
.assistant-body{padding:20px;display:flex;flex-direction:column;gap:14px;max-height:420px;overflow-y:auto;}
.msg{max-width:88%;padding:12px 15px;border-radius:var(--radius-m);font-size:.9rem;line-height:1.6;}
.msg.user{align-self:flex-end;background:var(--c-navy);color:#fff;border-bottom-right-radius:2px;}
.msg.ai{align-self:flex-start;background:var(--c-surface-soft);border:1px solid var(--c-border);border-bottom-left-radius:2px;}
.msg.ai .meta-line{display:block;font-size:.74rem;color:var(--c-text-faint);margin-top:8px;}
.assistant-suggest{display:flex;flex-wrap:wrap;gap:8px;padding:14px 20px;border-top:1px solid var(--c-border);}
.assistant-suggest button{
  background:var(--c-surface-soft);border:1px solid var(--c-border-strong);border-radius:999px;
  padding:8px 14px;font-size:.82rem;cursor:pointer;color:var(--c-text-soft);
}
.assistant-suggest button:hover{background:var(--c-cyan-soft);color:var(--c-cyan);}

/* ---------- app feature grid ---------- */
.app-feature{display:flex;gap:14px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-m);padding:18px;box-shadow:var(--shadow-s);}
.app-feature img{width:38px;height:38px;flex:none;}
.app-feature h3{font-size:.98rem;margin-bottom:.3em;}
.app-feature p{font-size:.88rem;color:var(--c-text-soft);margin:0;}
.app-download{
  background:var(--c-surface);border:1px dashed var(--c-border-strong);border-radius:var(--radius-l);
  padding:28px;text-align:center;
}
.app-download-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:18px;}
.app-download-item{
  border:1px solid var(--c-border);border-radius:var(--radius-m);padding:18px;width:160px;background:var(--c-surface-soft);
}
.app-download-item img{width:40px;height:40px;margin:0 auto 10px;}
.app-download-item p{font-size:.82rem;color:var(--c-text-faint);margin:6px 0 0;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:10px;}
.faq-item{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-s);overflow:hidden;}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:16px 20px;
  font-size:.96rem;font-weight:600;color:var(--c-navy);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq-q::after{content:"+";font-size:1.3rem;color:var(--c-gray-soft);flex:none;}
.faq-item.open .faq-q::after{content:"−";}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 20px;color:var(--c-text-soft);font-size:.92rem;}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 18px;}

/* ---------- company / disclaimers ---------- */
.disclaimer-box{
  background:var(--c-surface-soft);border:1px solid var(--c-border);border-radius:var(--radius-m);
  padding:20px 22px;font-size:.85rem;color:var(--c-text-soft);
}
.disclaimer-box + .disclaimer-box{margin-top:14px;}
.disclaimer-box strong{color:var(--c-navy);}

/* ---------- footer ---------- */
.site-footer{background:var(--c-navy);color:#c9d3dc;padding:48px 0 24px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
.footer-col h4{color:#fff;font-size:.92rem;margin-bottom:14px;}
.footer-col a{color:#c9d3dc;font-size:.86rem;display:block;margin-bottom:8px;}
.footer-col a:hover{color:#fff;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.footer-brand img{width:30px;height:30px;}
.footer-brand span{color:#fff;font-weight:700;}
.footer-meta{font-size:.8rem;color:#8ea0b3;line-height:1.9;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.78rem;color:#8ea0b3;
}

/* ---------- back to top ---------- */
.back-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  background:var(--c-navy);color:#fff;border:none;cursor:pointer;display:none;
  align-items:center;justify-content:center;box-shadow:var(--shadow-m);z-index:80;font-size:1.1rem;
}
.back-top.show{display:flex;}

/* ---------- misc utility ---------- */
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.stat-row{display:flex;gap:24px;flex-wrap:wrap;margin-top:20px;}
.stat-item{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-m);padding:16px 20px;min-width:140px;}
.stat-item .num{font-size:1.4rem;font-weight:700;color:var(--c-navy);font-family:var(--font-mono);}
.stat-item .label{font-size:.8rem;color:var(--c-text-faint);}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1024px){
  .observe-grid{grid-template-columns:repeat(2,1fr);}
  .card-grid.cols-4{grid-template-columns:repeat(2,1fr);}
  .card-grid.cols-3{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:860px){
  .main-nav{
    position:fixed;top:68px;left:0;right:0;bottom:0;background:var(--c-bg);
    flex-direction:column;padding:14px;gap:4px;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .2s ease, transform .2s ease;
    overflow-y:auto;border-top:1px solid var(--c-border);
  }
  .main-nav.open{opacity:1;pointer-events:auto;transform:translateY(0);}
  .main-nav a{padding:14px 12px;border-bottom:1px solid var(--c-border);border-radius:0;}
  .nav-toggle{display:block;}
  .hero-grid{grid-template-columns:1fr;}
  .lead-article,.lead-article.reverse{grid-template-columns:1fr;}
  .lead-article.reverse .lead-art-media{order:0;}
  .observe-grid{grid-template-columns:1fr;}
  .card-grid.cols-2,.card-grid.cols-3,.card-grid.cols-4{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:600px){
  .container{padding:0 16px;}
  section{padding:40px 0;}
  h1{font-size:1.5rem;}
  .hero h1{font-size:1.5rem;}
  .hero{padding:40px 0 32px;}
  .full-article{padding:20px;}
  .lead-article{padding:20px;}
  .funnel-step{grid-template-columns:1fr;gap:4px;}
  .funnel-step .val{text-align:left;}
  .ladder-row{grid-template-columns:1fr;gap:6px;}
  .ladder-row.head{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .app-download-row{flex-direction:column;align-items:center;}
}