/* 建筑浏览器 /bases/ —— 图纸柜：深蓝图纸底 + 琥珀色建筑码 */
:root{
  --ink:#0B1420;--sheet:#112033;--sheet-2:#16293F;--sheet-3:#1D3450;
  --line:rgba(140,190,255,.13);--line-2:rgba(140,190,255,.24);
  --chalk:#E8F0FA;--chalk-2:#A9BCD2;--chalk-3:#7189A4;
  --amber:#FFB547;--amber-ink:#2A1A02;--cyan:#7CC8FF;--heart:#FF6E86;--ok:#7FE3B0;
  --mono:ui-monospace,"Cascadia Mono","SF Mono",Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --r:16px;
}
*{box-sizing:border-box}
html{background:var(--ink)}
body.bb{margin:0;min-height:100vh;color:var(--chalk);font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased;
  background:
    radial-gradient(120% 60% at 80% -10%,rgba(124,200,255,.10),transparent 60%),
    linear-gradient(var(--line) 1px,transparent 1px) 0 0/48px 48px,
    linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/48px 48px,
    var(--ink);
  background-attachment:fixed}
a{color:var(--cyan)}
button,input,select{font:inherit;color:inherit}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

.bb-top{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px max(16px,calc((100vw - 1240px)/2));background:rgba(11,20,32,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bb-brand{display:flex;align-items:center;gap:8px;color:var(--chalk);text-decoration:none;font-size:16px}
.bb-brand svg{color:var(--amber)}
.bb-nav{display:flex;gap:6px}
.bb-nav a{padding:6px 12px;border-radius:999px;color:var(--chalk-2);text-decoration:none;font-size:14px}
.bb-nav a:hover{background:var(--sheet-2);color:var(--chalk)}
body.bb-inapp .bb-top{display:none}

.bb-main{max-width:1240px;margin:0 auto;padding:0 16px 40px}

/* 开头：左边说明，右边最多赞的那一个 */
.bb-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:28px;align-items:center;padding:40px 0 28px}
.bb-hero h1{margin:0;font-size:clamp(32px,5vw,52px);line-height:1.1;letter-spacing:.02em}
.bb-hero-t>p{margin:14px 0 0;max-width:30em;color:var(--chalk-2);font-size:16px;line-height:1.75}
.bb-hero-t>p b{color:var(--amber);font-weight:700}
.bb-sum{display:flex;gap:28px;margin:26px 0 0;padding:16px 0 0;border-top:1px dashed var(--line-2)}
.bb-sum div{display:flex;flex-direction:column}
.bb-sum dt{font-size:12px;color:var(--chalk-3)}
.bb-sum dd{margin:2px 0 0;font:600 22px/1.2 var(--mono);color:var(--chalk)}
.bb-feat{position:relative;display:block;aspect-ratio:16/9;border-radius:20px;overflow:hidden;background:var(--sheet);border:1px solid var(--line-2);text-decoration:none;color:var(--chalk);box-shadow:0 30px 60px -30px rgba(0,0,0,.8)}
.bb-feat img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease}
.bb-feat:hover img{transform:scale(1.03)}
.bb-feat::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 45%,rgba(6,12,20,.9))}
.bb-feat-cap{position:absolute;left:20px;right:20px;bottom:16px;z-index:1;display:flex;align-items:flex-end;justify-content:space-between;gap:12px}
.bb-feat-cap small{display:block;font-size:12px;color:var(--amber);font-weight:700}
.bb-feat-cap b{display:block;font-size:22px;line-height:1.3}
.bb-feat-cap span{font-size:13px;color:var(--chalk-2)}
/* 图纸四角 */
.bb-feat::before{content:"";position:absolute;inset:10px;z-index:1;pointer-events:none;
  background:
    linear-gradient(var(--amber),var(--amber)) left top/18px 2px no-repeat,linear-gradient(var(--amber),var(--amber)) left top/2px 18px no-repeat,
    linear-gradient(var(--amber),var(--amber)) right top/18px 2px no-repeat,linear-gradient(var(--amber),var(--amber)) right top/2px 18px no-repeat,
    linear-gradient(var(--amber),var(--amber)) left bottom/18px 2px no-repeat,linear-gradient(var(--amber),var(--amber)) left bottom/2px 18px no-repeat,
    linear-gradient(var(--amber),var(--amber)) right bottom/18px 2px no-repeat,linear-gradient(var(--amber),var(--amber)) right bottom/2px 18px no-repeat}

/* 筛选 */
.bb-tools{position:sticky;top:57px;z-index:20;display:flex;flex-direction:column;gap:10px;padding:14px 0 12px;background:linear-gradient(var(--ink) 80%,rgba(11,20,32,0))}
body.bb-inapp .bb-tools{top:0}
.bb-search{display:flex;align-items:center;gap:10px;height:46px;padding:0 14px;border-radius:12px;background:var(--sheet);border:1px solid var(--line-2)}
.bb-search svg{color:var(--chalk-3)}
.bb-search input{flex:1;min-width:0;border:0;background:none;outline:none;font-size:15px}
.bb-search input::placeholder{color:var(--chalk-3)}
.bb-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.bb-chips{display:flex;gap:6px;flex-wrap:wrap}
.bb-chips button{height:32px;padding:0 12px;border-radius:999px;border:1px solid var(--line-2);background:transparent;color:var(--chalk-2);font-size:13px;cursor:pointer;white-space:nowrap}
.bb-chips button:hover{border-color:var(--cyan);color:var(--chalk)}
.bb-chips button[aria-pressed=true]{background:var(--chalk);border-color:var(--chalk);color:var(--ink);font-weight:700}
.bb-chips button i{font-style:normal;margin-left:4px;opacity:.6;font-family:var(--mono);font-size:12px}
.bb-sort{margin-left:auto;height:32px;padding:0 30px 0 12px;border-radius:999px;border:1px solid var(--line-2);background:var(--sheet) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A9BCD2' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") right 10px center/14px no-repeat;color:var(--chalk);font-size:13px;-webkit-appearance:none;appearance:none;cursor:pointer}
.bb-tags button{height:28px;font-size:12px;border-style:dashed}
.bb-tags button[aria-pressed=true]{border-style:solid;background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.bb-count{margin:2px 2px 12px;font-size:13px;color:var(--chalk-3)}

/* 卡片 */
.bb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.bb-card{display:flex;flex-direction:column;border-radius:var(--r);overflow:hidden;background:var(--sheet);border:1px solid var(--line);text-decoration:none;color:var(--chalk);transition:border-color .2s,transform .2s}
.bb-card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.bb-ph{position:relative;aspect-ratio:16/9;background:var(--sheet-2);overflow:hidden}
.bb-ph img{width:100%;height:100%;object-fit:cover;display:block}
.bb-ph .none{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--chalk-3);font-size:13px;background:repeating-linear-gradient(45deg,transparent 0 10px,rgba(140,190,255,.05) 10px 20px)}
.bb-code{position:absolute;right:8px;bottom:8px;padding:3px 8px;border-radius:6px;background:rgba(6,12,20,.82);color:var(--amber);font:700 13px/1.4 var(--mono);letter-spacing:.04em;border:1px solid rgba(255,181,71,.35)}
.bb-n-ph{position:absolute;left:8px;bottom:8px;padding:2px 7px;border-radius:6px;background:rgba(6,12,20,.7);font-size:11px;color:var(--chalk-2)}
.bb-like{position:absolute;right:8px;top:8px;display:flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;background:rgba(6,12,20,.7);font:600 12px/1.4 var(--mono)}
.bb-like svg{width:14px;height:14px;color:var(--heart);fill:var(--heart)}
.bb-body{display:flex;flex-direction:column;gap:6px;padding:12px 14px 14px}
.bb-body h3{margin:0;font-size:16px;line-height:1.35;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bb-meta{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--chalk-3);min-width:0}
.bb-meta .who{color:var(--chalk-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.bb-biome{flex:none;padding:0 7px;border-radius:5px;font-size:11.5px;line-height:20px;background:color-mix(in srgb,var(--bc) 18%,transparent);color:var(--bc)}
.bb-cost{display:flex;gap:12px;margin-top:4px;padding-top:9px;border-top:1px dashed var(--line);font:600 12.5px/1 var(--mono);color:var(--chalk-2)}
.bb-cost span{display:flex;align-items:center;gap:4px}
.bb-cost img{width:18px;height:18px;object-fit:contain}
.bb-cost .ent{margin-left:auto;color:var(--chalk-3);font-weight:500}

.bb-empty{padding:60px 20px;text-align:center;color:var(--chalk-3)}
.bb-empty b{display:block;color:var(--chalk);font-size:18px;margin-bottom:6px}
.bb-skel{aspect-ratio:16/12.6;border-radius:var(--r);background:linear-gradient(100deg,var(--sheet) 40%,var(--sheet-2) 50%,var(--sheet) 60%) 0 0/200% 100%;animation:sk 1.4s linear infinite}
@keyframes sk{to{background-position:-200% 0}}

/* 详情 */
.bb-sheet{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;padding:24px}
.bb-sheet-bg{position:absolute;inset:0;background:rgba(4,8,14,.72);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:fd .2s}
.bb-detail{position:relative;width:min(1080px,100%);max-height:calc(100vh - 48px);overflow:auto;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);border-radius:22px;background:var(--sheet);border:1px solid var(--line-2);box-shadow:0 40px 80px -30px #000;animation:pop .28s cubic-bezier(.2,.9,.25,1.1)}
@keyframes fd{from{opacity:0}}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.98)}}
.bb-detail>*{min-width:0}
.bb-gal{background:#070D16;display:flex;flex-direction:column;justify-content:center}
.bb-gal-main{position:relative;aspect-ratio:16/9;background:#070D16}
.bb-gal-main img{width:100%;height:100%;object-fit:contain;display:block}
.bb-gal-th{display:flex;gap:8px;padding:10px;overflow-x:auto}
.bb-gal-th button{flex:none;width:96px;aspect-ratio:16/9;padding:0;border-radius:8px;overflow:hidden;border:2px solid transparent;background:var(--sheet-2);cursor:pointer;opacity:.6}
.bb-gal-th button[aria-pressed=true]{border-color:var(--amber);opacity:1}
.bb-gal-th img{width:100%;height:100%;object-fit:cover;display:block}
.bb-info{display:flex;flex-direction:column;gap:16px;padding:22px 22px 24px}
.bb-x{position:absolute;right:12px;top:12px;z-index:2;width:38px;height:38px;border-radius:19px;border:0;background:rgba(6,12,20,.75);color:var(--chalk);cursor:pointer;display:flex;align-items:center;justify-content:center}
.bb-info h2{margin:0;font-size:24px;line-height:1.3;padding-right:36px}
.bb-info .bb-meta{font-size:13.5px}
.bb-desc{margin:0;color:var(--chalk-2);white-space:pre-wrap;word-break:break-word}
.bb-codebox{display:flex;align-items:center;gap:10px;padding:12px 12px 12px 16px;border-radius:14px;background:var(--ink);border:1px dashed rgba(255,181,71,.45)}
.bb-codebox small{display:block;font-size:12px;color:var(--chalk-3)}
.bb-codebox b{display:block;font:700 26px/1.2 var(--mono);color:var(--amber);letter-spacing:.06em}
.bb-codebox>div{flex:1}
.bb-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:42px;padding:0 18px;border-radius:12px;border:0;cursor:pointer;font-weight:700;font-size:14px;text-decoration:none}
.bb-btn-a{background:var(--amber);color:var(--amber-ink)}
.bb-btn-a:hover{filter:brightness(1.06)}
.bb-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.bb-stats div{padding:10px 12px;border-radius:12px;background:var(--sheet-2)}
.bb-stats b{display:block;font:700 18px/1.2 var(--mono)}
.bb-stats span{font-size:12px;color:var(--chalk-3)}
.bb-h{margin:0 0 8px;font-size:13px;color:var(--chalk-3);font-weight:600}
.bb-costs{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px}
.bb-costs div{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:12px;background:var(--sheet-2)}
.bb-costs img{width:30px;height:30px;object-fit:contain}
.bb-costs b{display:block;font:700 15px/1.2 var(--mono)}
.bb-costs span{font-size:11.5px;color:var(--chalk-3)}
.bb-taglist{display:flex;flex-wrap:wrap;gap:6px}
.bb-taglist span{padding:2px 10px;border-radius:999px;border:1px dashed var(--line-2);font-size:12px;color:var(--cyan)}
.bb-how{margin:0;padding:0;list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:8px}
.bb-how li{counter-increment:s;display:flex;gap:10px;align-items:baseline;font-size:14px;color:var(--chalk-2)}
.bb-how li::before{content:counter(s);flex:none;width:22px;height:22px;border-radius:11px;background:var(--sheet-3);color:var(--chalk);font:700 12px/22px var(--mono);text-align:center}
.bb-how b{color:var(--chalk)}

.bb-toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));z-index:80;transform:translate(-50%,20px);padding:10px 18px;border-radius:12px;background:var(--chalk);color:var(--ink);font-weight:700;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
.bb-toast.on{opacity:1;transform:translate(-50%,0)}
.bb-foot{max-width:1240px;margin:0 auto;padding:24px 16px calc(32px + env(safe-area-inset-bottom,0px));font-size:12.5px;color:var(--chalk-3);border-top:1px dashed var(--line)}

@media (max-width:860px){
  .bb-hero{grid-template-columns:1fr;gap:20px;padding:24px 0 12px}
  .bb-sum{gap:20px}
  .bb-tools{top:53px}
  .bb-sort{margin-left:0;order:-1;flex:none}
  .bb-row{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 -16px;padding:0 16px}
  .bb-row::-webkit-scrollbar,.bb-tags::-webkit-scrollbar{display:none}
  .bb-row .bb-chips{flex-wrap:nowrap}
  .bb-tags{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 -16px;padding:0 16px}
  .bb-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:12px}
  .bb-sheet{padding:0;align-items:stretch}
  .bb-detail{grid-template-columns:1fr;max-height:none;height:100%;border-radius:0;border:0}
  .bb-info{padding:18px 16px calc(28px + env(safe-area-inset-bottom,0px))}
}
@media (prefers-reduced-motion:reduce){.bb-detail,.bb-sheet-bg,.bb-skel{animation:none}.bb-card,.bb-feat img{transition:none}}