:root{
  --bg:#f5f7fa; --card:#fff; --line:#e3e8ee; --ink:#101a24; --ink2:#4a5868;
  --muted:#7d8b9a; --accent:#0f6fde; --radius:12px;
  --shadow:0 10px 28px rgba(16,26,36,.10);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Inter","Segoe UI",system-ui,-apple-system,"Noto Sans",Arial,sans-serif;
  font-size:14px;line-height:1.55}
a{color:inherit;text-decoration:none}
img{display:block}
.wrap{max-width:1240px;margin:0 auto;padding:0 20px}

.hdr{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.hdr .wrap{height:62px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:9px;font-weight:750;font-size:15px;letter-spacing:-.2px}
.brand .dot{width:10px;height:10px;border-radius:3px;background:var(--accent)}
.langs{display:flex;gap:2px;flex-wrap:wrap}
.langs a{padding:4px 8px;border-radius:6px;font-size:12px;font-weight:650;color:var(--muted)}
.langs a:hover{background:#eef3f9;color:var(--ink)}
.langs a.on{background:var(--ink);color:#fff}

.cbar{background:var(--ink);color:#fff}
.cbar .wrap{display:flex;flex-wrap:wrap;gap:8px 18px;padding:8px 20px;align-items:center}
.cbtn{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;
  color:#fff;padding:3px 2px;border-radius:6px;direction:ltr}
.cbtn:hover{color:#8fc2ff}
.cbtn .ci{font-size:13px;opacity:.85}
.cmail{margin-inline-start:auto}
@media(max-width:620px){.cmail{margin-inline-start:0}}

.hero{padding:34px 0 26px;background:linear-gradient(180deg,#fff 0,#fff 55%,rgba(255,255,255,0) 100%)}
.hero h1{margin:0 0 8px;font-size:30px;line-height:1.25;letter-spacing:-.5px}
.intro{margin:0 0 10px;color:var(--ink2);max-width:820px}
.stats{margin:0;font-size:12.5px;color:var(--muted);font-weight:600}

.toolbar{position:sticky;top:62px;z-index:20;background:rgba(245,247,250,.94);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:12px 0}
.toolbar .wrap{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
#q{flex:1 1 260px;min-width:200px;height:40px;padding:0 14px;border:1px solid var(--line);
  border-radius:10px;background:#fff;font-size:13.5px;outline:none;color:var(--ink)}
#q:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(15,111,222,.12)}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{height:34px;padding:0 12px;border-radius:8px;border:1px solid var(--line);
  background:#fff;color:var(--ink2);font-size:12.5px;font-weight:600;cursor:pointer}
.chip b{color:var(--muted);font-weight:600;margin-inline-start:3px}
.chip:hover{border-color:#c8d5e2}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}
.chip.on b{color:rgba(255,255,255,.65)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px;padding:26px 0 56px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;color:inherit;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.card[hidden]{display:none}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d2dde8}
.thumb{background:#0f1720;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden}
.thumb img{width:100%;height:100%;object-fit:contain;transition:transform .3s}
.card:hover .thumb img{transform:scale(1.03)}
.cbody{padding:12px 13px 14px;display:flex;flex-direction:column;gap:5px;flex:1}
.badge{align-self:flex-start;font-size:10.5px;font-weight:750;letter-spacing:.5px;
  color:var(--accent);background:#eaf2fd;padding:2px 6px;border-radius:4px}
.cbody h3{margin:0;font-size:14px;line-height:1.35;letter-spacing:-.1px}
.meta{margin:0;font-size:12px;color:var(--muted)}
.cnt{margin:auto 0 0;font-size:11.5px;color:var(--muted);font-weight:600}
.cnt .go{color:var(--accent);font-weight:750}
.empty{text-align:center;color:var(--muted);padding:40px 0 70px}

footer{border-top:1px solid var(--line);background:#fff}
footer .wrap{padding:22px 20px;display:flex;justify-content:space-between;gap:12px;
  font-size:12px;color:var(--muted);flex-wrap:wrap}
footer .fcta{padding-top:0;padding-bottom:20px;gap:10px}
footer p{margin:0}
.fbtn{display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:9px;
  border:1px solid var(--line);background:#f7f9fc;color:var(--ink);font-size:13px;font-weight:650;direction:ltr}
.fbtn:hover{border-color:var(--accent);color:var(--accent);background:#eef5ff}

/* 悬浮联系按钮 */
.fab{position:fixed;inset-inline-end:18px;bottom:20px;z-index:60;display:flex;flex-direction:column;gap:10px}
.fab-btn{display:flex;align-items:center;gap:8px;padding:11px 15px;border-radius:26px;
  background:var(--accent);color:#fff;font-size:13px;font-weight:700;box-shadow:0 8px 22px rgba(15,111,222,.35)}
.fab-btn:hover{background:#0b5cba}
.fab-mail{background:#101a24}
.fab-mail:hover{background:#000}
.fab-btn .ci{font-size:15px}

/* 图片查看层 */
.ov{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;padding:20px}
.ov[hidden]{display:none}
.ovbg{position:absolute;inset:0;background:rgba(9,15,22,.86);backdrop-filter:blur(3px)}
.ovbox{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 320px;
  width:100%;max-width:1180px;max-height:92vh;background:#fff;border-radius:14px;
  overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.4)}
.ovmain{position:relative;background:#101820;display:flex;align-items:center;justify-content:center;
  min-height:420px;padding:18px}
.ovmain img{max-width:100%;max-height:calc(92vh - 90px);object-fit:contain;cursor:zoom-in}
.nav{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:50%;
  border:1px solid rgba(255,255,255,.25);background:rgba(10,18,26,.55);color:#fff;font-size:22px;
  line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:2}
.nav:hover{background:rgba(10,18,26,.85)}
.prev{left:12px}.next{right:12px}
.ovcnt{position:absolute;bottom:24px;inset-inline-start:24px;background:rgba(10,18,26,.6);
  color:#fff;font-size:12px;padding:4px 9px;border-radius:20px}
.ovorig{position:absolute;bottom:24px;inset-inline-end:24px;background:var(--accent);color:#fff;
  font-size:12px;font-weight:650;padding:6px 11px;border-radius:7px}
.ovorig:hover{background:#0b5cba}
.ovx{position:absolute;top:10px;inset-inline-end:10px;width:36px;height:36px;border-radius:50%;
  border:0;background:rgba(10,18,26,.6);color:#fff;font-size:22px;line-height:1;cursor:pointer;z-index:5}
.ovside{padding:20px 18px;overflow:auto;border-inline-start:1px solid var(--line)}
.ovside h2{margin:4px 0 6px;font-size:18px;line-height:1.35}
.ovmeta{margin:0 0 6px;font-size:12.5px;color:var(--muted)}
.ovhint{margin:0 0 14px;font-size:11.5px;color:var(--muted);background:#f3f6fa;padding:7px 9px;border-radius:6px}
.thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}
.thumbs .msec{grid-column:1/-1;font-size:10.5px;font-weight:750;letter-spacing:.6px;
  text-transform:uppercase;color:var(--muted);margin:6px 0 0}
.thumbs button{padding:0;border:2px solid transparent;border-radius:6px;background:#fff;cursor:pointer;overflow:hidden}
.thumbs button:hover{border-color:#c3d2df}
.thumbs button.on{border-color:var(--accent)}
.thumbs img{width:100%;aspect-ratio:1;object-fit:contain;padding:3px;background:#f7f9fb}

/* RTL */
[dir="rtl"] .badge{align-self:flex-start}
[dir="rtl"] .intro{max-width:820px}
[dir="rtl"] .thumb img,[dir="rtl"] .ovmain img{transform:none}

@media(max-width:900px){
  .ovbox{grid-template-columns:1fr;max-height:94vh}
  .ovside{border-inline-start:0;border-top:1px solid var(--line);max-height:34vh}
  .ovmain{min-height:340px}
  .ovmain img{max-height:52vh}
  .thumbs{grid-template-columns:repeat(6,1fr)}
}
@media(max-width:640px){
  .hdr .wrap{height:auto;padding:9px 12px;flex-wrap:wrap;gap:8px}
  .brand{font-size:14px}
  .langs{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:0;padding-bottom:2px}
  .langs a{padding:5px 7px;font-size:11.5px;white-space:nowrap}
  .cbar .wrap{padding:7px 12px;gap:6px 12px;font-size:12px}
  .cbtn{font-size:12px}
  .cmail{margin-inline-start:0}
  .toolbar{position:static;padding:10px 0}
  .hero{padding:22px 0 18px}
  .hero h1{font-size:21px}
  .intro{font-size:13px}
  .grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;padding-top:16px}
  .cbody{padding:10px 10px 12px}
  .cbody h3{font-size:13px}
  .fab{inset-inline:10px;bottom:10px;flex-direction:row}
  .fab-btn{flex:1;justify-content:center;border-radius:11px;padding:12px 10px}
  .ov{padding:0}
  .ovbox{border-radius:0;height:100%;max-height:100%}
  .ovmain{padding:10px}
  .ovside{padding:14px}
  .ovcnt{bottom:14px;inset-inline-start:14px}
  .ovorig{bottom:14px;inset-inline-end:14px}
  .thumbs{grid-template-columns:repeat(4,1fr)}
}
@media(max-width:430px){
  .hero h1{font-size:19px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cbody h3{font-size:12.5px}
  .meta{font-size:11px}
  .fab-t{display:none}
  .fab-btn{padding:13px}
  .ovside{max-height:42vh}
}