/* ==========================================================================
   非凡娱乐 2026 数字唱片杂志 — 全站样式
   feifanyule-h5.com.cn
   ========================================================================== */

:root{
  --ink:#14121a;
  --ink-2:#1b1822;
  --cream:#f4ede0;
  --cream-2:#ece3d2;
  --wine:#6b1330;
  --wine-2:#8a1a3e;
  --midnight:#1c2a4e;
  --violet:#5b3a8e;
  --silver:#c9c4bd;
  --neon:#3ddc84;
  --orange:#e8792f;
  --gold:#d9a441;
  --rose:#c65b7c;
  --line: rgba(244,237,224,0.14);
  --line-soft: rgba(20,18,26,0.1);
  --shadow: 0 18px 40px rgba(10,8,14,0.35);
  --radius: 10px;
  --serif: Georgia, "Songti SC", "Noto Serif SC", "STSong", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --maxw: 1240px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.75;
  font-size:16px;
  background-image:
    radial-gradient(rgba(20,18,26,0.035) 1px, transparent 1px);
  background-size:5px 5px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--serif);margin:0 0 .5em;line-height:1.3;color:var(--ink);}
p{margin:0 0 1em;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
::selection{background:var(--wine);color:var(--cream);}

/* ---------- Deco big-number background type ---------- */
.deco-type{
  position:absolute;
  font-family:var(--serif);
  font-weight:900;
  color:var(--ink);
  opacity:.05;
  letter-spacing:6px;
  pointer-events:none;
  user-select:none;
  white-space:nowrap;
  z-index:0;
}

/* ==========================================================================
   Top Bar / Nav
   ========================================================================== */
.topbar{
  background:var(--ink);
  color:var(--cream);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:200;
}
.topbar-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;gap:18px;height:72px;
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:800;font-size:22px;color:var(--cream);flex-shrink:0;}
.brand img{width:40px;height:40px;border-radius:50%;}
.brand small{display:block;font-family:var(--sans);font-weight:500;font-size:11px;letter-spacing:2px;color:var(--gold);text-transform:uppercase;}
.main-nav{display:flex;gap:2px;flex:1;overflow-x:auto;}
.main-nav a{
  padding:10px 12px;font-size:14.5px;white-space:nowrap;border-radius:6px;
  color:rgba(244,237,224,0.82);transition:background .2s,color .2s;
}
.main-nav a:hover,.main-nav a.active{background:rgba(244,237,224,0.1);color:var(--cream);}
.nav-actions{display:flex;gap:10px;flex-shrink:0;}
.btn{
  display:inline-block;padding:9px 16px;border-radius:30px;font-size:13.5px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:transform .15s, background .2s, color .2s;
}
.btn:hover{transform:translateY(-1px);}
.btn-neon{background:var(--neon);color:var(--ink);}
.btn-outline{border-color:rgba(244,237,224,0.4);color:var(--cream);}
.btn-outline:hover{background:rgba(244,237,224,0.12);}
.btn-wine{background:var(--wine);color:var(--cream);}
.btn-gold{background:var(--gold);color:var(--ink);}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--cream);padding:8px 12px;border-radius:8px;font-size:20px;cursor:pointer;}

/* Breadcrumb */
.breadcrumb{background:var(--cream-2);border-bottom:1px solid var(--line-soft);font-size:13.5px;}
.breadcrumb .wrap{padding:10px 24px;display:flex;gap:6px;color:#6b6558;}
.breadcrumb a{color:var(--wine);font-weight:600;}
.breadcrumb span{opacity:.5;}

/* ==========================================================================
   Hero (magazine cover, asymmetric 42/58)
   ========================================================================== */
.hero{
  background:var(--ink);color:var(--cream);
  position:relative;overflow:hidden;
}
.hero-grid{
  max-width:var(--maxw);margin:0 auto;padding:64px 24px 40px;
  display:grid;grid-template-columns:42% 58%;gap:20px;align-items:center;position:relative;z-index:2;
}
.hero-eyebrow{color:var(--neon);font-weight:800;letter-spacing:3px;font-size:13px;text-transform:uppercase;margin-bottom:14px;}
.hero-kicker{color:var(--gold);font-weight:700;font-size:14px;letter-spacing:1px;margin-bottom:6px;}
.hero h1{font-size:40px;color:var(--cream);margin-bottom:16px;}
.hero p.lead{color:rgba(244,237,224,0.85);font-size:16.5px;margin-bottom:24px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.hero-art{position:relative;}
.hero-art img{width:100%;height:auto;border-radius:14px;}

/* ---------- Album radar ticker ---------- */
.radar{
  background:var(--midnight);color:var(--cream);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  overflow-x:auto;
}
.radar-inner{max-width:var(--maxw);margin:0 auto;padding:18px 24px;}
.radar-title{font-family:var(--serif);font-weight:800;font-size:15px;color:var(--gold);margin-bottom:10px;letter-spacing:1px;}
.radar-track{display:flex;gap:0;overflow-x:auto;padding-bottom:6px;}
.radar-item{
  flex:0 0 220px;padding:14px 16px;border-right:1px solid rgba(244,237,224,0.14);
}
.radar-item .r-artist{font-weight:800;font-size:14.5px;color:var(--cream);}
.radar-item .r-album{font-family:var(--serif);font-style:italic;color:var(--gold);font-size:13.5px;margin:2px 0 6px;}
.radar-item .r-meta{font-size:12px;color:var(--silver);display:flex;gap:8px;flex-wrap:wrap;}
.radar-item .r-meta span{background:rgba(244,237,224,0.08);padding:2px 8px;border-radius:20px;}
.radar-item a{display:inline-block;margin-top:8px;font-size:12.5px;color:var(--neon);font-weight:700;}

/* ==========================================================================
   Section headers
   ========================================================================== */
section{position:relative;padding:56px 0;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:28px;gap:16px;flex-wrap:wrap;}
.section-head h2{font-size:28px;}
.section-tag{font-size:12.5px;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--wine);margin-bottom:6px;display:block;}
.section-more{font-size:13.5px;font-weight:700;color:var(--wine);border-bottom:2px solid var(--wine);padding-bottom:2px;}
.section-alt{background:var(--ink);color:var(--cream);}
.section-alt h2,.section-alt h3{color:var(--cream);}
.section-alt .section-tag{color:var(--gold);}
.section-cream2{background:var(--cream-2);}

/* ==========================================================================
   Editorial asymmetric grid (1 big + 2 mid + 2 small horizontal)
   ========================================================================== */
.edit-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:24px;
}
.edit-feature{
  background:var(--ink);color:var(--cream);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);
  display:flex;flex-direction:column;
}
.edit-feature img{height:340px;object-fit:cover;width:100%;}
.edit-feature .ef-body{padding:26px;}
.edit-feature h3{font-size:26px;}
.edit-feature .tag-row{margin-bottom:10px;}
.edit-side{display:flex;flex-direction:column;gap:18px;}
.edit-mid{
  display:grid;grid-template-columns:1fr 1fr;gap:18px;
}
.edit-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;overflow:hidden;
  display:flex;flex-direction:column;box-shadow:0 6px 18px rgba(20,18,26,0.06);
}
.edit-card img{height:150px;object-fit:cover;width:100%;}
.edit-card .ec-body{padding:16px;}
.edit-card h4{font-size:16px;margin-bottom:6px;}
.edit-small-row{display:flex;flex-direction:column;gap:14px;}
.edit-small{
  display:grid;grid-template-columns:110px 1fr;gap:14px;background:#fff;border:1px solid var(--line-soft);
  border-radius:10px;padding:10px;align-items:center;
}
.edit-small img{width:110px;height:80px;object-fit:cover;border-radius:6px;}
.edit-small h5{font-size:14.5px;margin:0 0 4px;font-family:var(--sans);font-weight:700;}
.meta-line{font-size:12px;color:#8a8375;}
.tag{
  display:inline-block;font-size:11px;font-weight:700;padding:3px 9px;border-radius:20px;
  background:var(--wine);color:var(--cream);margin-right:6px;letter-spacing:.5px;
}
.tag-gold{background:var(--gold);color:var(--ink);}
.tag-midnight{background:var(--midnight);color:var(--cream);}
.tag-neon{background:var(--neon);color:var(--ink);}
.tag-outline{background:transparent;border:1px solid var(--wine);color:var(--wine);}

/* ==========================================================================
   Vertical release timeline
   ========================================================================== */
.timeline-wrap{display:grid;grid-template-columns:260px 1fr;gap:32px;align-items:start;}
.timeline-art{position:sticky;top:100px;}
.timeline-months{display:flex;flex-direction:column;gap:0;}
.tl-month{padding:28px 0 28px 32px;border-left:3px solid var(--line-soft);position:relative;}
.tl-month:last-child{border-left:3px solid transparent;}
.tl-month::before{
  content:"";position:absolute;left:-11px;top:30px;width:19px;height:19px;border-radius:50%;
  background:var(--wine);border:4px solid var(--cream);box-shadow:0 0 0 2px var(--wine);
}
.tl-month h3{font-size:20px;color:var(--wine);margin-bottom:16px;}
.tl-entries{display:flex;flex-direction:column;gap:14px;}
.tl-entry{display:grid;grid-template-columns:60px 1fr;gap:14px;background:#fff;border:1px solid var(--line-soft);border-radius:10px;padding:12px 14px;align-items:center;}
.tl-entry .tl-date{font-weight:800;color:var(--midnight);font-size:14px;text-align:center;}
.tl-entry h4{font-size:15px;margin:0 0 2px;}

/* ==========================================================================
   Vinyl shelf (horizontal genre rack)
   ========================================================================== */
.shelf{overflow-x:auto;padding-bottom:14px;}
.shelf-track{display:flex;gap:20px;min-width:max-content;padding:6px 2px 20px;}
.shelf-card{
  width:220px;flex:0 0 auto;background:var(--ink);border-radius:10px;overflow:hidden;
  box-shadow:0 10px 26px rgba(20,18,26,0.25);transition:transform .2s;
  border:1px solid rgba(244,237,224,0.08);
}
.shelf-card:hover{transform:translateY(-6px);}
.shelf-card img{width:220px;height:220px;object-fit:cover;}
.shelf-card .sc-body{padding:14px;color:var(--cream);}
.shelf-card h4{font-size:15px;color:var(--cream);margin-bottom:4px;}
.shelf-card p{font-size:12.5px;color:var(--silver);margin:0;}

/* ==========================================================================
   Newspaper two-column editorial desk
   ========================================================================== */
.desk{display:grid;grid-template-columns:1.7fr 1fr;gap:36px;}
.desk-main article{margin-bottom:0;}
.desk-main h3{font-size:24px;}
.desk-cols{columns:2;column-gap:28px;font-size:15px;}
.desk-cols p{margin-bottom:1em;}
.desk-side{border-left:1px solid var(--line-soft);padding-left:28px;}
.desk-side h4{font-size:14px;text-transform:uppercase;letter-spacing:1.5px;color:var(--wine);border-bottom:2px solid var(--wine);padding-bottom:8px;margin-bottom:12px;}
.desk-list{list-style:none;margin:0 0 26px;padding:0;}
.desk-list li{padding:10px 0;border-bottom:1px dashed var(--line-soft);font-size:14px;}
.desk-list li:last-child{border-bottom:none;}
.desk-list .dl-title{font-weight:700;display:block;margin-bottom:2px;}
.desk-list .dl-meta{font-size:12px;color:#8a8375;}

/* ==========================================================================
   Cards / generic content blocks
   ========================================================================== */
.card{background:#fff;border:1px solid var(--line-soft);border-radius:12px;padding:22px;box-shadow:0 6px 18px rgba(20,18,26,0.05);}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.article-body{max-width:820px;}
.article-body h2{font-size:24px;margin-top:1.6em;}
.article-meta-box{
  background:var(--cream-2);border:1px solid var(--line-soft);border-radius:10px;padding:16px 20px;font-size:13.5px;
  display:grid;grid-template-columns:repeat(2,1fr);gap:6px 20px;margin:18px 0 26px;
}
.article-meta-box b{color:var(--wine);}
.disclaimer{
  background:#fbf3e4;border-left:4px solid var(--gold);padding:14px 18px;font-size:13.5px;border-radius:6px;margin:20px 0;color:#5a5142;
}
.source-line{font-size:12.5px;color:#8a8375;margin-top:20px;}

/* Article listing */
.news-hero-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:26px;margin-bottom:32px;}
.news-hero{background:var(--ink);color:var(--cream);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);}
.news-hero img{width:100%;height:380px;object-fit:cover;}
.news-hero .nh-body{padding:28px;}
.news-hero h2{font-size:28px;}
.news-picks{display:flex;flex-direction:column;gap:16px;}
.pick-card{display:grid;grid-template-columns:96px 1fr;gap:12px;background:#fff;border:1px solid var(--line-soft);border-radius:10px;padding:10px;}
.pick-card img{width:96px;height:72px;object-fit:cover;border-radius:6px;}
.pick-card h5{font-size:14px;margin:0 0 3px;}
.article-list-2col{columns:2;column-gap:26px;}
.article-list-item{break-inside:avoid;background:#fff;border:1px solid var(--line-soft);border-radius:10px;padding:14px;margin-bottom:18px;display:grid;grid-template-columns:80px 1fr;gap:12px;}
.article-list-item img{width:80px;height:80px;object-fit:cover;border-radius:6px;}
.article-list-item h5{font-size:14px;margin:0 0 4px;}
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;}
.filter-btn{padding:8px 16px;border-radius:24px;border:1px solid var(--line-soft);background:#fff;font-size:13px;font-weight:700;cursor:pointer;}
.filter-btn.active{background:var(--wine);color:var(--cream);border-color:var(--wine);}

/* Albums library layout */
.lib-layout{display:grid;grid-template-columns:220px 1fr;gap:28px;}
.lib-nav{position:sticky;top:96px;align-self:start;background:#fff;border:1px solid var(--line-soft);border-radius:12px;padding:16px;}
.lib-nav h4{font-size:13px;text-transform:uppercase;letter-spacing:1.5px;color:var(--wine);margin-bottom:10px;}
.lib-nav button{
  display:block;width:100%;text-align:left;background:none;border:none;padding:9px 10px;border-radius:8px;
  font-size:14px;font-weight:600;cursor:pointer;color:var(--ink);margin-bottom:2px;
}
.lib-nav button.active,.lib-nav button:hover{background:var(--cream-2);color:var(--wine);}
.lib-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.album-card{background:#fff;border:1px solid var(--line-soft);border-radius:10px;overflow:hidden;box-shadow:0 6px 18px rgba(20,18,26,0.05);}
.album-card img{width:100%;height:220px;object-fit:cover;}
.album-card .ac-body{padding:14px;}
.album-card h4{font-size:15.5px;margin-bottom:2px;}
.album-card .ac-sub{font-family:var(--serif);font-style:italic;color:var(--wine);font-size:13.5px;margin-bottom:8px;}
.album-card dl{display:grid;grid-template-columns:auto 1fr;gap:2px 8px;font-size:12px;margin:8px 0;color:#5a5647;}
.album-card dt{font-weight:700;color:var(--ink);}
.album-card .fav-btn{margin-top:10px;width:100%;padding:8px;border-radius:8px;border:1px solid var(--wine);background:none;color:var(--wine);font-weight:700;cursor:pointer;font-size:12.5px;}
.album-card .fav-btn.saved{background:var(--wine);color:var(--cream);}

/* FAQ */
.faq-list{max-width:820px;}
.faq-item{border-bottom:1px solid var(--line-soft);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:18px 0;font-size:16px;font-weight:700;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-family:var(--sans);
}
.faq-q::after{content:"+";font-size:22px;color:var(--wine);transition:transform .2s;}
.faq-item.open .faq-q::after{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:14.5px;color:#4c4738;}
.faq-item.open .faq-a{max-height:400px;padding-bottom:18px;}

/* Table */
.data-table{width:100%;border-collapse:collapse;font-size:14px;background:#fff;border-radius:10px;overflow:hidden;}
.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--line-soft);text-align:left;}
.data-table th{background:var(--ink);color:var(--cream);font-weight:700;font-size:13px;}
.data-table tr:last-child td{border-bottom:none;}
.table-wrap{overflow-x:auto;}

/* Steps (download page) */
.step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.step-card{background:var(--ink);color:var(--cream);border-radius:14px;padding:26px;position:relative;overflow:hidden;}
.step-num{font-family:var(--serif);font-size:52px;font-weight:900;color:var(--gold);opacity:.5;position:absolute;top:10px;right:16px;}
.step-card h3{color:var(--cream);font-size:19px;position:relative;z-index:1;}

/* App phone showcase */
.app-showcase{position:relative;}
.phone-frame{
  width:300px;margin:0 auto;background:var(--ink);border-radius:44px;border:6px solid #2a2632;padding:16px;box-shadow:var(--shadow);
}
.phone-screen{background:linear-gradient(180deg,#241a35,#14121a);border-radius:28px;padding:18px;min-height:520px;color:var(--cream);}
.phone-notch{width:70px;height:8px;background:#2a2632;border-radius:6px;margin:0 auto 14px;}
.orbit-wrap{position:relative;max-width:920px;margin:0 auto;}
.orbit-grid{display:grid;grid-template-columns:1fr 300px 1fr;gap:20px;align-items:center;}
.orbit-col{display:flex;flex-direction:column;gap:16px;}
.orbit-item{background:#fff;border:1px solid var(--line-soft);border-radius:12px;padding:14px 16px;box-shadow:0 6px 16px rgba(20,18,26,0.06);}
.orbit-item h5{font-size:14px;margin-bottom:4px;color:var(--wine);}
.orbit-item p{font-size:12.5px;margin:0;color:#5a5647;}

/* App scroll-narrative sections */
.app-scene{min-height:auto;padding:70px 0;border-bottom:1px solid var(--line-soft);}
.app-scene:nth-child(even){background:var(--cream-2);}
.app-scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;}

/* AI assistant demo */
.ai-demo{background:var(--ink);color:var(--cream);border-radius:16px;padding:26px;box-shadow:var(--shadow);}
.ai-demo h3{color:var(--cream);}
.ai-chat{background:#1f1b29;border-radius:12px;padding:16px;min-height:220px;max-height:340px;overflow-y:auto;margin-bottom:14px;}
.ai-msg{margin-bottom:12px;font-size:14px;line-height:1.6;}
.ai-msg.user{text-align:right;color:var(--gold);}
.ai-msg.bot{color:var(--cream);}
.ai-msg .bubble{display:inline-block;padding:9px 14px;border-radius:14px;max-width:82%;}
.ai-msg.user .bubble{background:var(--wine);}
.ai-msg.bot .bubble{background:#2a2536;}
.ai-quick{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;}
.ai-quick button{background:rgba(244,237,224,0.08);border:1px solid rgba(244,237,224,0.2);color:var(--cream);padding:6px 12px;border-radius:20px;font-size:12.5px;cursor:pointer;}
.ai-input-row{display:flex;gap:10px;}
.ai-input-row input{flex:1;padding:11px 14px;border-radius:24px;border:1px solid rgba(244,237,224,0.25);background:#1f1b29;color:var(--cream);font-size:14px;}
.ai-input-row button{padding:11px 20px;border-radius:24px;border:none;background:var(--neon);color:var(--ink);font-weight:800;cursor:pointer;}
.ai-note{font-size:12px;color:var(--silver);margin-top:10px;}

/* Register demo form */
.register-demo{max-width:520px;background:#fff;border:1px solid var(--line-soft);border-radius:14px;padding:26px;box-shadow:0 6px 18px rgba(20,18,26,0.06);}
.register-demo label{display:block;font-size:13px;font-weight:700;color:var(--wine);margin-bottom:16px;}
.register-demo input{width:100%;margin-top:6px;padding:11px 14px;border-radius:8px;border:1px solid var(--line-soft);background:var(--cream-2);color:#4c4738;font-size:14px;}
.register-demo button{width:100%;padding:12px;border-radius:8px;border:none;background:var(--wine);color:var(--cream);font-weight:700;font-size:14.5px;cursor:pointer;margin-top:6px;}

/* Company info table */
.info-table{width:100%;border-collapse:collapse;}
.info-table th,.info-table td{padding:12px 16px;border-bottom:1px solid var(--line-soft);text-align:left;font-size:14.5px;}
.info-table th{width:180px;color:var(--wine);font-weight:700;background:var(--cream-2);}

/* History timeline (company development, horizontal steps) */
.history-steps{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;}
.history-step{background:#fff;border:1px solid var(--line-soft);border-radius:10px;padding:16px;text-align:center;}
.history-step .hs-num{font-family:var(--serif);font-weight:900;font-size:26px;color:var(--gold);}
.history-step h5{font-size:13.5px;margin:6px 0 4px;}
.history-step p{font-size:11.5px;color:#5a5647;margin:0;}

/* ==========================================================================
   Footer — vinyl catalog three-column
   ========================================================================== */
.site-footer{background:var(--ink);color:var(--cream);margin-top:60px;position:relative;}
.footer-top{
  border-bottom:1px solid var(--line);
  padding:50px 0 36px;
}
.footer-cols{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:800;font-size:22px;margin-bottom:14px;}
.footer-brand img{width:38px;height:38px;border-radius:50%;}
.footer-col h5{font-size:13px;text-transform:uppercase;letter-spacing:1.5px;color:var(--gold);margin-bottom:14px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;font-size:14px;}
.footer-col a{color:rgba(244,237,224,0.78);}
.footer-col a:hover{color:var(--cream);}
.footer-desc{color:rgba(244,237,224,0.7);font-size:13.5px;max-width:420px;}
.footer-bottom{padding:20px 0;font-size:12.5px;color:rgba(244,237,224,0.5);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

.back-top{
  position:fixed;right:24px;bottom:26px;width:46px;height:46px;border-radius:50%;background:var(--wine);color:var(--cream);
  display:flex;align-items:center;justify-content:center;font-size:20px;border:none;cursor:pointer;box-shadow:0 8px 20px rgba(0,0,0,0.3);
  opacity:0;pointer-events:none;transition:opacity .25s;z-index:150;
}
.back-top.show{opacity:1;pointer-events:auto;}

/* ==========================================================================
   Utility
   ========================================================================== */
.mt-0{margin-top:0;}
.text-center{text-align:center;}
.muted{color:#8a8375;}
.badge-status{display:inline-block;font-size:11px;font-weight:700;padding:4px 10px;border-radius:20px;background:var(--midnight);color:var(--cream);}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px){
  .hero-grid{grid-template-columns:1fr;}
  .edit-grid{grid-template-columns:1fr;}
  .edit-mid{grid-template-columns:1fr;}
  .desk{grid-template-columns:1fr;}
  .desk-side{border-left:none;padding-left:0;border-top:1px solid var(--line-soft);padding-top:20px;}
  .desk-cols{columns:1;}
  .timeline-wrap{grid-template-columns:1fr;}
  .timeline-art{position:static;}
  .lib-layout{grid-template-columns:1fr;}
  .lib-nav{position:static;}
  .lib-grid{grid-template-columns:repeat(2,1fr);}
  .news-hero-grid{grid-template-columns:1fr;}
  .article-list-2col{columns:1;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr 1fr;}
  .step-row{grid-template-columns:1fr;}
  .orbit-grid{grid-template-columns:1fr;}
  .history-steps{grid-template-columns:repeat(3,1fr);}
  .footer-cols{grid-template-columns:1fr;}
  .app-scene-grid{grid-template-columns:1fr;}
}
@media (max-width: 640px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .topbar.nav-open .main-nav{display:flex;flex-direction:column;position:absolute;top:72px;left:0;right:0;background:var(--ink);padding:12px 24px;border-bottom:1px solid var(--line);}
  .nav-actions{display:none;}
  .hero h1{font-size:28px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .lib-grid{grid-template-columns:1fr;}
  .history-steps{grid-template-columns:repeat(2,1fr);}
  .article-meta-box{grid-template-columns:1fr;}
  .article-list-item{grid-template-columns:64px 1fr;}
}