/* 91-m.homes — Obsidian Editorial 独立视觉体系 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#08090d;
  --surface:#12141c;
  --surface-2:#1a1d28;
  --amber:#f5a623;
  --amber-soft:#ffc857;
  --violet:#8b5cf6;
  --violet-deep:#6d28d9;
  --cyan:#22d3ee;
  --text:#ececf2;
  --text-dim:#9a9ab0;
  --line:rgba(255,255,255,.07);
  --header:62px;
  --radius:16px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--ink);color:var(--text);line-height:1.8;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--amber-soft);text-decoration:none;transition:color .2s}
a:hover{color:var(--amber)}
.container{width:min(1140px,93vw);margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* Header */
.site-header{position:fixed;inset:0 0 auto 0;z-index:1000;height:var(--header);background:rgba(8,9,13,.9);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.header-wrap{display:flex;align-items:center;justify-content:space-between;height:100%;padding:0 3.5vw}
.brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:700;font-size:1.02rem;letter-spacing:.02em}
.brand img{width:36px;height:36px;border-radius:9px}
.site-nav ul{display:flex;gap:26px;list-style:none}
.site-nav a{color:var(--text-dim);font-size:.9rem;font-weight:500;padding:4px 0;border-bottom:2px solid transparent}
.site-nav a:hover,.site-nav a.active{color:var(--amber-soft);border-bottom-color:var(--amber)}
.menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:.25s}
.menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Sticky ads */
#ads-sticky-bar{position:fixed;left:0;right:0;z-index:999;background:rgba(12,14,20,.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transform:translateY(110%);opacity:0;transition:transform .35s,opacity .35s;pointer-events:none}
#ads-sticky-bar.visible{transform:translateY(0);opacity:1;pointer-events:auto}
#ads-sticky-bar .ads-inner{display:flex;flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:8px 12px;padding:10px 14px;max-width:1140px;margin:0 auto}
#ads-sticky-bar .ads-inner>div{width:calc(12.5% - 11px);min-width:68px;display:flex;flex-direction:column;align-items:center}
#ads-sticky-bar .ads-inner img{width:54px;height:54px;border-radius:15px;object-fit:cover;box-shadow:0 4px 14px rgba(0,0,0,.35)}
#ads-sticky-bar .ads-inner .caption{font-size:10px;color:var(--text-dim);text-align:center;max-width:74px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}

main{padding-top:var(--header)}

/* Hero — layered backgrounds */
.hero-stage{position:relative;min-height:min(92vh,780px);display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-bg img{position:absolute;border-radius:20px;object-fit:cover;object-position:top;opacity:.52;filter:saturate(1.08) brightness(1.1);box-shadow:0 24px 64px rgba(0,0,0,.45)}
.hero-bg .bg-a{width:38%;aspect-ratio:9/16;top:8%;left:-4%;transform:rotate(-14deg);z-index:1}
.hero-bg .bg-b{width:34%;aspect-ratio:9/16;top:14%;right:6%;transform:rotate(11deg);z-index:2}
.hero-bg .bg-c{width:30%;aspect-ratio:9/16;bottom:6%;left:18%;transform:rotate(6deg);z-index:3}
.hero-bg .bg-d{width:32%;aspect-ratio:9/16;top:22%;left:42%;transform:rotate(-5deg);z-index:4;opacity:.46}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(ellipse 85% 65% at 55% 38%,rgba(139,92,246,.12),transparent 50%),linear-gradient(180deg,rgba(8,9,13,.28) 0%,rgba(8,9,13,.62) 68%,var(--ink) 100%);z-index:5}
.hero-inner{position:relative;z-index:6;width:min(1140px,93vw);margin:0 auto;padding:48px 0 56px}
.hero-inner h1,.hero-lead,.hero-tag,.hero-pills{text-shadow:0 2px 20px rgba(0,0,0,.65)}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:7px 18px;border-radius:999px;background:rgba(245,166,35,.1);border:1px solid rgba(245,166,35,.28);color:var(--amber-soft);font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin-bottom:22px}
.hero-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--amber);box-shadow:0 0 10px var(--amber)}
.hero-inner h1{font-size:clamp(1.85rem,5vw,3rem);font-weight:800;line-height:1.22;color:#fff;margin-bottom:18px;max-width:720px}
.hero-inner h1 span{display:block;font-size:.62em;font-weight:600;color:var(--text-dim);margin-top:10px;letter-spacing:.04em}
.hero-lead{font-size:clamp(.98rem,2.2vw,1.08rem);color:var(--text-dim);max-width:640px;margin-bottom:32px}
.hero-pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px}
.hero-pills span{padding:8px 16px;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:.82rem;color:var(--text-dim)}
.hero-pills span strong{color:var(--amber-soft);font-weight:600}
.hero-scroll{display:inline-flex;align-items:center;gap:8px;color:var(--text-dim);font-size:.85rem}
.hero-scroll svg{width:18px;height:18px;animation:bob 2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}

/* Download zone */
.download-band{padding:28px 0 24px;background:var(--surface);border-bottom:1px solid var(--line)}
.download-band .band-label{text-align:center;font-size:.84rem;color:var(--text-dim);margin-bottom:14px;letter-spacing:.1em}
#ads{display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;gap:10px 14px;background:transparent}
#ads>div{display:flex;flex-direction:column;align-items:center;width:70px}
#ads img{width:65px;height:65px;object-fit:cover;border-radius:18px;box-shadow:0 6px 18px rgba(0,0,0,.28);transition:transform .18s,box-shadow .18s}
#ads a{display:inline-block;border-radius:15px}
#ads img:hover{transform:translateY(-4px) scale(1.04);box-shadow:0 10px 24px rgba(0,0,0,.4)}
#ads .caption{height:15px;font-size:11px;color:var(--text-dim);text-align:center;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}

/* Sections */
.section{padding:64px 0}
.section-head{margin-bottom:40px;padding-left:18px;border-left:3px solid var(--amber)}
.section-eyebrow{font-size:.78rem;font-weight:600;color:var(--violet);letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}
.section-title{font-size:clamp(1.45rem,3.5vw,2rem);font-weight:800;color:#fff;line-height:1.3;margin-bottom:12px}
.section-intro{color:var(--text-dim);max-width:780px;font-size:.98rem}

/* Editorial 3:7 */
.editorial{display:grid;grid-template-columns:3fr 7fr;gap:36px;align-items:start;margin-bottom:48px}
.editorial.reverse{grid-template-columns:7fr 3fr}
.editorial.reverse .editorial-media{order:2}
.editorial.reverse .editorial-body{order:1}
.editorial-media{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--surface-2);box-shadow:0 16px 48px rgba(0,0,0,.35)}
.editorial-media img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.editorial-media figcaption{padding:10px 14px;font-size:.75rem;color:var(--text-dim);background:rgba(0,0,0,.35);border-top:1px solid var(--line)}
.editorial-body h3{font-size:1.25rem;font-weight:700;color:#fff;margin-bottom:14px;line-height:1.4}
.editorial-body p{color:var(--text-dim);margin-bottom:14px;font-size:.95rem}
.editorial-body ul{margin:12px 0 16px 18px;color:var(--text-dim);font-size:.93rem}
.editorial-body li{margin-bottom:8px}
.editorial-body li::marker{color:var(--amber)}

/* Bento features */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.bento-item{padding:26px 22px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);transition:border-color .25s,transform .25s}
.bento-item:hover{border-color:rgba(245,166,35,.35);transform:translateY(-3px)}
.bento-item.wide{grid-column:span 2}
.bento-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(139,92,246,.25),rgba(245,166,35,.15));margin-bottom:16px;font-size:1.3rem}
.bento-item h4{font-size:1.02rem;font-weight:700;color:#fff;margin-bottom:10px}
.bento-item p{font-size:.88rem;color:var(--text-dim);line-height:1.65}

/* Stats ribbon */
.stats-ribbon{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border-radius:var(--radius);overflow:hidden;margin:48px 0}
.stats-ribbon div{padding:28px 20px;background:var(--surface);text-align:center}
.stats-ribbon .num{font-size:1.65rem;font-weight:800;color:var(--amber-soft);line-height:1.2}
.stats-ribbon .lbl{font-size:.78rem;color:var(--text-dim);margin-top:6px}

/* Text modules */
.prose-block{max-width:860px;margin:0 auto 40px}
.prose-block h3{font-size:1.15rem;font-weight:700;color:#fff;margin:28px 0 12px;padding-left:14px;border-left:2px solid var(--violet)}
.prose-block p{color:var(--text-dim);margin-bottom:14px;font-size:.94rem}
.prose-block ol,.prose-block ul{margin:12px 0 16px 22px;color:var(--text-dim);font-size:.93rem}
.prose-block li{margin-bottom:8px}

/* SEO columns & guide */
.seo-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:32px}
.seo-col{padding:28px 26px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line)}
.seo-col h3{font-size:1.05rem;font-weight:700;color:#fff;margin-bottom:14px;padding-left:12px;border-left:2px solid var(--amber)}
.seo-col p{color:var(--text-dim);font-size:.92rem;margin-bottom:12px;line-height:1.75}
.seo-col ul{margin:10px 0 0 18px;color:var(--text-dim);font-size:.9rem}
.seo-col li{margin-bottom:7px}
.guide-steps{counter-reset:step;list-style:none;margin:24px 0 0;padding:0}
.guide-steps li{counter-increment:step;display:grid;grid-template-columns:48px 1fr;gap:16px;padding:22px 0;border-bottom:1px solid var(--line);align-items:start}
.guide-steps li:last-child{border-bottom:none}
.guide-steps li::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,rgba(245,166,35,.2),rgba(139,92,246,.15));color:var(--amber-soft);font-weight:800;font-size:1.1rem;flex-shrink:0}
.guide-steps h4{font-size:1rem;font-weight:700;color:#fff;margin-bottom:8px}
.guide-steps p{color:var(--text-dim);font-size:.92rem;margin:0;line-height:1.7}
.text-panels{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px}
.text-panel{padding:24px 22px;border-radius:var(--radius);background:var(--surface-2);border:1px solid var(--line)}
.text-panel h4{font-size:.98rem;font-weight:700;color:var(--amber-soft);margin-bottom:10px}
.text-panel p{color:var(--text-dim);font-size:.88rem;line-height:1.7;margin:0}
.preview-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:36px 0 12px}
.preview-strip figure{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--surface-2)}
.preview-strip img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.preview-strip figcaption{padding:8px 10px;font-size:.72rem;color:var(--text-dim);text-align:center;background:rgba(0,0,0,.3)}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 0;background:none;border:none;color:#fff;font-size:1rem;font-weight:600;text-align:left;cursor:pointer;font-family:inherit}
.faq-q svg{flex-shrink:0;width:20px;height:20px;color:var(--amber);transition:transform .25s}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 0 20px;color:var(--text-dim);font-size:.92rem}
.faq-item.open .faq-a{max-height:600px}

/* CTA band */
.cta-band{padding:56px 0;background:linear-gradient(135deg,rgba(109,40,217,.18),rgba(245,166,35,.08));border-top:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center}
.cta-band h2{font-size:clamp(1.4rem,3vw,1.85rem);font-weight:800;color:#fff;margin-bottom:12px}
.cta-band p{color:var(--text-dim);margin-bottom:24px;max-width:560px;margin-left:auto;margin-right:auto;font-size:.95rem}
.btn-glow{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:999px;background:linear-gradient(135deg,var(--amber),#e8870a);color:#111;font-weight:700;font-size:.95rem;border:none;cursor:pointer;box-shadow:0 8px 32px rgba(245,166,35,.35);transition:transform .2s,box-shadow .2s}
.btn-glow:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(245,166,35,.45);color:#111}

/* Footer */
.site-footer{padding:48px 0 32px;background:var(--surface);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer-brand p{color:var(--text-dim);font-size:.88rem;margin-top:12px;max-width:320px}
.footer-col h4{font-size:.85rem;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.06em}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--text-dim);font-size:.88rem}
.footer-col a:hover{color:var(--amber-soft)}
.footer-bottom{padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:.8rem;color:var(--text-dim)}

/* Breadcrumb */
.breadcrumb{padding:18px 0 0;font-size:.84rem;color:var(--text-dim)}
.breadcrumb a{color:var(--text-dim)}
.breadcrumb a:hover{color:var(--amber-soft)}
.breadcrumb span{margin:0 8px;opacity:.5}

/* Legal / sub pages */
.page-hero{padding:36px 0 28px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(1.5rem,3.5vw,2rem);font-weight:800;color:#fff;margin-bottom:10px}
.page-hero p{color:var(--text-dim);font-size:.95rem;max-width:680px}
.legal-content{padding:40px 0 64px;max-width:860px}
.legal-content h2{font-size:1.12rem;font-weight:700;color:#fff;margin:32px 0 12px}
.legal-content h3{font-size:1rem;font-weight:600;color:var(--amber-soft);margin:24px 0 10px}
.legal-content p,.legal-content li{color:var(--text-dim);font-size:.93rem;margin-bottom:12px}
.legal-content ul,.legal-content ol{margin:10px 0 16px 22px}

/* Error pages */
.error-page{min-height:calc(100vh - var(--header) - 80px);display:flex;align-items:center;justify-content:center;text-align:center;padding:48px 20px}
.error-code{font-size:clamp(4rem,12vw,7rem);font-weight:900;line-height:1;background:linear-gradient(135deg,var(--amber),var(--violet));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.error-page h1{font-size:1.4rem;font-weight:700;color:#fff;margin:16px 0 10px}
.error-page p{color:var(--text-dim);margin-bottom:24px;max-width:440px}

/* Body states for sticky ads */
body.has-sticky-ads-pc #ads-sticky-bar{top:var(--header)}
body.has-sticky-ads:not(.has-sticky-ads-pc) #ads-sticky-bar{bottom:0;top:auto;border-top:1px solid var(--line);border-bottom:none;transform:translateY(110%)}
body.has-sticky-ads:not(.has-sticky-ads-pc) #ads-sticky-bar.visible{transform:translateY(0)}
body.has-sticky-ads:not(.has-sticky-ads-pc) #ads-sticky-bar .ads-inner>div{width:calc(25% - 12px)}
body.has-sticky-ads:not(.has-sticky-ads-pc){padding-bottom:100px}

/* Responsive */
@media(max-width:960px){
  .editorial,.editorial.reverse{grid-template-columns:1fr;gap:24px}
  .editorial.reverse .editorial-media,.editorial.reverse .editorial-body{order:unset}
  .editorial-media{max-width:280px;margin:0 auto}
  .bento{grid-template-columns:1fr 1fr}
  .bento-item.wide{grid-column:span 1}
  .stats-ribbon{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-bg .bg-a{width:50%;left:-10%;opacity:.48}
  .hero-bg .bg-b{width:44%;right:-6%;opacity:.48}
  .hero-bg .bg-c{display:block;width:36%;bottom:4%;left:28%;opacity:.42}
  .hero-bg .bg-d{display:block;width:34%;top:18%;left:38%;opacity:.4}
  .seo-columns,.text-panels{grid-template-columns:1fr}
  .preview-strip{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .menu-btn{display:flex}
  .site-nav{position:fixed;top:var(--header);left:0;right:0;background:rgba(12,14,20,.98);border-bottom:1px solid var(--line);padding:16px 0;transform:translateY(-120%);opacity:0;transition:.3s;pointer-events:none}
  .site-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .site-nav ul{flex-direction:column;align-items:center;gap:18px}
  .site-nav a.nav-dl{display:none}
  .bento{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
}