/* FoxAI Lab 子页共享样式 · 与主站同一套设计变量 */
:root{
  --bg:#0C1117; --bg2:#10161F; --card:#141C27; --card2:#182230;
  --line:#233042; --line2:#2E3F55;
  --tx:#E7EDF4; --tx2:#9AA8B8; --tx3:#6B7A8C;
  --gold:#E9B44C; --gold-dim:#B8893A; --teal:#3FA796; --blue:#5B9BD5; --red:#D46A5E;
  --navbg:rgba(12,17,23,.72); --goldtx:#1A1408; --goldhover:#F2C368; --thumbbg:#0A0F15;
  --sel:rgba(233,180,76,.28); --modbg:rgba(233,180,76,.10); --modbd:rgba(233,180,76,.30);
  --shadow:0 12px 30px rgba(0,0,0,.45);
  --radius:14px;
}
html[data-theme="light"]{
  --bg:#F5F7FA; --bg2:#ECF0F5; --card:#FFFFFF; --card2:#F4F7FB;
  --line:#E2E8F0; --line2:#CCD6E2;
  --tx:#16202E; --tx2:#4E5C70; --tx3:#7B899B;
  --gold:#9A6F14; --gold-dim:#B0862C; --teal:#1E7F72; --blue:#2F6FA8; --red:#B3453A;
  --navbg:rgba(245,247,250,.85); --goldtx:#FFFFFF; --goldhover:#B9871C; --thumbbg:#E9EEF5;
  --sel:rgba(154,111,20,.18); --modbg:rgba(154,111,20,.08); --modbd:rgba(154,111,20,.26);
  --shadow:0 12px 30px rgba(20,30,45,.14);
}

*{margin:0; padding:0; box-sizing:border-box}
html,body{overflow-x:hidden}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--tx); line-height:1.75; font-size:16px;
  -webkit-font-smoothing:antialiased;
  transition:background .25s ease, color .25s ease;
}
::selection{background:var(--sel)}
a{color:var(--gold); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; display:block}
.wrap{max-width:1080px; margin:0 auto; padding:0 24px}
.kicker{font-size:13px; letter-spacing:4px; color:var(--gold); text-transform:uppercase; margin-bottom:10px}
h1{font-size:clamp(28px,4.4vw,42px); line-height:1.24; font-weight:700}
.btn{display:inline-block; padding:12px 26px; border-radius:10px; font-size:15px; font-weight:600; text-decoration:none; transition:.2s; border:none; cursor:pointer; font-family:inherit}
.btn:hover{text-decoration:none; transform:translateY(-1px)}
.btn-gold{background:var(--gold); color:var(--goldtx)}
.btn-gold:hover{background:var(--goldhover)}

/* nav（与主站 index 一致） */
nav{position:fixed; top:0; left:0; right:0; z-index:100;
  background:linear-gradient(180deg, color-mix(in srgb, var(--bg) 88%, transparent), color-mix(in srgb, var(--bg) 55%, transparent));
  backdrop-filter:blur(18px) saturate(1.15); border-bottom:1px solid transparent;
  transition:border-color .35s ease, background .35s ease}
nav.scrolled{border-bottom-color:var(--line); background:var(--navbg)}
.nav-in{max-width:1120px; margin:0 auto; padding:10px 20px 10px 52px; display:flex; align-items:center; justify-content:flex-start; gap:6px}
.logo{display:flex; align-items:center; white-space:nowrap; flex-shrink:0; margin-left:10px}
.logo-img{width:32px; height:32px; border-radius:0; display:block; object-fit:contain;
  box-shadow:none; transition:transform .35s cubic-bezier(.22,1,.36,1), filter .35s}
.logo:hover .logo-img, a.logo:hover .logo-img{transform:translateY(-1px) scale(1.03); filter:drop-shadow(0 8px 16px rgba(0,0,0,.22)); text-decoration:none}
.nav-rail{position:relative; display:flex; gap:2px; list-style:none; overflow-x:auto; scrollbar-width:none; min-width:0;
  padding:0; border:none; background:transparent; box-shadow:none}
.nav-rail::-webkit-scrollbar{display:none}
.nav-rail > li{flex:none}
.nav-rail a{position:relative; display:flex; align-items:center; justify-content:center;
  min-width:0; padding:8px 12px; border-radius:10px; color:var(--tx2);
  text-decoration:none; white-space:nowrap; isolation:isolate;
  transition:color .22s ease, background-color .22s ease, transform .22s ease}
.nav-rail a .nx{display:none}
.nav-rail a .nl{font-size:14px; font-weight:560; line-height:1.15; letter-spacing:.02em}
.nav-rail a::after{content:""; position:absolute; left:22%; right:22%; bottom:3px; height:2px; border-radius:2px;
  background:linear-gradient(90deg, transparent, var(--gold), transparent); transform:scaleX(0); transform-origin:center;
  transition:transform .32s cubic-bezier(.22,1,.36,1); opacity:.95}
.nav-rail a:hover,.nav-rail a:focus-visible{color:var(--tx); background:var(--modbg); text-decoration:none; transform:translateY(-1px); outline:none}
.nav-rail a:hover::after,.nav-rail a:focus-visible::after,.nav-rail a.on::after{transform:scaleX(1)}
.nav-rail a.on{color:var(--tx); background:var(--modbg); font-weight:600}
.nav-rail a.nav-cta{background:var(--gold); color:var(--goldtx); padding:8px 14px}
.nav-rail a.nav-cta .nl{font-size:13.5px; font-weight:650}
.nav-rail a.nav-cta::after{display:none}
.nav-rail a.nav-cta:hover{background:var(--goldhover); color:var(--goldtx); transform:translateY(-1px)}
@media(prefers-reduced-motion:reduce){
  .nav-rail a,.nav-rail a::after,.logo-img{transition:none}
  .nav-rail a:hover{transform:none}
}
@media(max-width:860px){
  .nav-in{padding:8px 12px 8px 36px; gap:10px}
  .nav-rail a{padding:7px 9px}
  .nav-rail a .nl{font-size:13px}
  .logo-img{width:32px; height:32px}
}
@media(max-width:560px){
  .nav-in{padding:8px 10px 8px 26px}
  .nav-rail a{padding:7px 8px}
  .nav-rail a .nl{font-size:12.5px}
  .logo-img{width:28px; height:28px}
}

/* 语言 / 主题切换器（与主站一致） */
.ui-ctl{display:flex; align-items:center; gap:8px; flex-shrink:0; margin-left:auto}
.lang{position:relative}
.lang-btn{display:flex; align-items:center; gap:7px; background:var(--card); border:1px solid var(--line2);
  color:var(--tx); border-radius:10px; padding:6px 11px; font:inherit; font-size:13.5px; cursor:pointer; transition:.2s}
.lang-btn:hover{border-color:var(--gold); color:var(--gold)}
.lang-btn .globe{width:15px; height:15px; flex-shrink:0}
.lang-btn .caret{font-size:10px; color:var(--tx3); line-height:1}
.lang-menu{position:absolute; right:0; top:calc(100% + 8px); min-width:138px; background:var(--card);
  border:1px solid var(--line2); border-radius:12px; padding:6px; display:none; box-shadow:var(--shadow); z-index:120}
.lang-menu.open{display:block}
.lang-menu button{display:flex; align-items:center; gap:9px; width:100%; text-align:left; background:none; border:none; color:var(--tx2);
  font:inherit; font-size:13.5px; padding:8px 11px; border-radius:8px; cursor:pointer; transition:.15s}
.lang-menu button:hover{background:var(--bg2); color:var(--tx)}
.lang-menu button.on{background:var(--modbg); color:var(--gold); font-weight:600}
.lang-menu button .flag, .lang-btn .cur .flag{font-size:15px; line-height:1}
.theme-btn{display:flex; align-items:center; justify-content:center; width:36px; height:36px; border-radius:10px;
  background:var(--card); border:1px solid var(--line2); color:var(--tx2); cursor:pointer; transition:.2s}
.theme-btn:hover{border-color:var(--gold); color:var(--gold)}
.theme-btn svg{width:17px; height:17px; display:block}
.theme-btn .ic-sun{display:none}
html[data-theme="light"] .theme-btn .ic-sun{display:block}
html[data-theme="light"] .theme-btn .ic-moon{display:none}
@media(max-width:640px){ .lang-btn .cur{display:none} .lang-btn{padding:6px 9px} }

/* 页脚 */
.site-foot{border-top:1px solid var(--line); padding:26px 24px 34px; text-align:center; font-size:12.5px; color:var(--tx3)}
.site-foot a{color:var(--tx3); text-decoration:underline; text-underline-offset:3px}
.site-foot a:hover{color:var(--tx2)}
.site-foot .beian{margin-top:6px; line-height:1.75}
.site-foot .beian a{text-decoration:none}
.site-foot .beian-sep{margin:0 2px}
.site-foot .beian-name{color:var(--tx3)}
.site-foot .beian-gongan{display:inline-flex; align-items:center; gap:4px; white-space:nowrap}
.site-foot .beian-gongan img{width:14px; height:14px; display:inline-block; vertical-align:middle; margin:0; max-width:none}

/* ===== Lab 列表页 ===== */
.lab-hero{padding:150px 0 42px; border-bottom:1px solid var(--line); position:relative; overflow:hidden;
  background:
    radial-gradient(640px 280px at 12% 20%, rgba(63,167,150,.10), transparent 55%),
    radial-gradient(720px 320px at 88% 0%, rgba(233,180,76,.10), transparent 58%),
    var(--bg)}
.lab-hero h1{margin-bottom:12px; letter-spacing:-.02em}
.lab-hero .lab-sub{color:var(--tx2); font-size:16.5px; max-width:640px}
main.wrap{position:relative}
.lab-filters{display:flex; gap:8px; flex-wrap:wrap; padding:28px 0 4px}
.filter-btn{background:transparent; border:1px solid var(--line2); color:var(--tx2); font:inherit;
  font-size:13px; padding:7px 15px; border-radius:999px; cursor:pointer;
  transition:background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease}
.filter-btn:hover{border-color:var(--gold); color:var(--gold); transform:translateY(-1px)}
.filter-btn.active{background:var(--gold); border-color:var(--gold); color:var(--goldtx); font-weight:600}
.lab-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:22px; padding:22px 0 8px}
@media(max-width:960px){ .lab-grid{grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px} }
@media(max-width:640px){ .lab-grid{grid-template-columns:1fr; gap:16px} }

.lab-card{
  --accent:var(--gold);
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  display:flex; flex-direction:column;
  position:relative;
  opacity:0; transform:translateY(10px);
  animation:labCardIn .45s cubic-bezier(.22,1,.36,1) forwards;
  animation-delay:calc(var(--i,0) * 45ms);
  transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
@keyframes labCardIn{to{opacity:1; transform:translateY(0)}}
.lab-card.cat-lab{--accent:var(--gold)}
.lab-card.cat-app{--accent:var(--teal)}
.lab-card.cat-quant{--accent:#C9961A}
.lab-card.cat-iot{--accent:var(--blue)}
.lab-card.cat-flow{--accent:#C8784A}
.lab-card--text{
  background:
    linear-gradient(var(--accent), var(--accent)) 0 0 / 100% 2px no-repeat,
    var(--card);
}
.lab-card:hover{
  transform:translateY(-3px);
  border-color:color-mix(in srgb, var(--accent) 40%, var(--line));
  box-shadow:0 10px 28px rgba(8,12,18,.12);
}
html[data-theme="light"] .lab-card:hover{box-shadow:0 10px 26px rgba(22,32,46,.08)}
.lab-card-link{display:flex; flex-direction:column; flex:1; color:inherit; text-decoration:none; min-height:100%}
.lab-card-link:hover{text-decoration:none; color:inherit}

.lab-card-media{position:relative; aspect-ratio:2.2/1; overflow:hidden; background:var(--thumbbg);
  border-bottom:1px solid var(--line)}
.lab-card-media img{width:100%; height:100%; object-fit:cover; display:block;
  transition:transform .5s cubic-bezier(.22,1,.36,1), filter .4s ease}
.lab-card:hover .lab-card-media img{transform:scale(1.03)}
@media (hover:hover){
  .lab-card-media img{filter:saturate(.42) contrast(.86) brightness(.82)}
  .lab-card-media::after{
    content:""; position:absolute; inset:0; pointer-events:none;
    background:rgba(10,16,26,.40);
    transition:opacity .4s ease;
  }
  .lab-card:hover .lab-card-media img,
  .lab-card:focus-within .lab-card-media img{filter:none}
  .lab-card:hover .lab-card-media::after,
  .lab-card:focus-within .lab-card-media::after{opacity:0}
}

.lab-card-body{padding:16px 18px 15px; display:flex; flex-direction:column; gap:8px; flex:1}
.lab-card-top{display:flex; align-items:center; justify-content:space-between; gap:10px}
.lab-card-top time{font-size:11.5px; color:var(--tx3); font-variant-numeric:tabular-nums; letter-spacing:.02em; flex-shrink:0}
.lab-category{font-size:11px; letter-spacing:.03em; padding:2px 8px; border-radius:4px;
  background:color-mix(in srgb, var(--accent) 12%, transparent);
  color:color-mix(in srgb, var(--accent) 78%, var(--tx));
  border:1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  font-weight:600}
.lab-card h3{font-size:16.5px; line-height:1.4; font-weight:650; letter-spacing:-.015em;
  color:var(--tx); display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
  margin-top:2px}
.lab-card:hover h3{color:color-mix(in srgb, var(--accent) 55%, var(--tx))}
.lab-summary{font-size:13px; color:var(--tx2); line-height:1.65; flex:1;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden}
.lab-meta{display:flex; align-items:center; gap:8px; margin-top:4px;
  padding-top:11px; border-top:1px solid var(--line); font-size:12px; color:var(--tx3)}
.lab-tags{display:inline-flex; gap:5px; flex-wrap:wrap; min-width:0; flex:1}
.lab-more{margin-left:auto; color:var(--accent); font-size:12px; font-weight:600; white-space:nowrap;
  opacity:.7; transition:opacity .2s ease, transform .2s ease; display:inline-flex; align-items:center; gap:3px}
.lab-card:hover .lab-more{opacity:1; transform:translateX(2px)}
.tag{font-size:10.5px; padding:1px 7px; border-radius:4px; background:var(--bg2); color:var(--tx3);
  border:1px solid var(--line2); white-space:nowrap}
.pagination{display:flex; align-items:center; justify-content:center; gap:14px; padding:30px 0 72px}
.pagination button{background:var(--card); border:1px solid var(--line2); color:var(--tx2); font:inherit;
  font-size:13.5px; padding:8px 18px; border-radius:10px; cursor:pointer; transition:.2s}
.pagination button:hover{border-color:var(--gold); color:var(--gold)}
.pagination .page-info{font-size:13px; color:var(--tx3); font-variant-numeric:tabular-nums}
.no-posts{padding:70px 0 100px; text-align:center; color:var(--tx3); font-size:15px}

/* ===== 文章详情页 ===== */
.post-container{max-width:820px; margin:0 auto; padding:150px 24px 30px}
.post-header .post-category{display:inline-block; font-size:12px; letter-spacing:.5px; padding:3px 12px; border-radius:999px;
  background:var(--modbg); color:var(--gold); border:1px solid var(--modbd); margin-bottom:16px}
.post-header h1{margin-bottom:14px}
.post-meta{display:flex; align-items:center; gap:10px; flex-wrap:wrap; font-size:13px; color:var(--tx3); margin-bottom:30px}
.post-cover{border-radius:var(--radius); border:1px solid var(--line); margin-bottom:30px; background:var(--thumbbg)}
.post-content{font-size:16px; line-height:1.9; color:var(--tx)}
.post-content h2{font-size:24px; font-weight:600; margin:34px 0 14px}
.post-content h3{font-size:19px; font-weight:600; margin:26px 0 10px}
.post-content p{margin-bottom:16px}
.post-content ul,.post-content ol{margin:0 0 16px 24px}
.post-content li{margin-bottom:8px}
.post-content blockquote{border-left:3px solid var(--gold); background:var(--card); padding:14px 20px;
  border-radius:0 var(--radius) var(--radius) 0; color:var(--tx2); margin:0 0 16px}
.post-content code{background:var(--bg2); border:1px solid var(--line); border-radius:6px; padding:1px 7px; font-size:14px}
.post-content pre{background:var(--bg2); border:1px solid var(--line); border-radius:10px; padding:16px 18px; overflow-x:auto; margin-bottom:16px}
.post-content pre code{background:none; border:none; padding:0; font-size:13.5px; line-height:1.7}
.post-content img{border-radius:10px; margin:10px 0 16px}
.post-like{display:flex; flex-direction:column; align-items:center; gap:4px;
  margin:28px 0 8px; padding:10px 0 4px}
.post-like-btn{appearance:none; background:transparent; border:none; cursor:pointer;
  padding:6px; line-height:0; color:#C9D0D8; transition:color .2s ease, transform .15s ease}
html[data-theme="light"] .post-like-btn{color:#B8C0CA}
.post-like-btn:hover{color:#E2603F; transform:scale(1.06)}
.post-like-btn.on{color:#E2603F}
.post-like-btn:disabled{opacity:.55; cursor:wait; transform:none}
.post-like-ico{width:34px; height:34px; display:block}
.post-like-n{font-size:15px; font-weight:600; color:var(--tx); font-variant-numeric:tabular-nums;
  min-width:1.5em; text-align:center; line-height:1.2}
.attach-box{margin-top:28px; padding-top:22px; border-top:1px solid var(--line)}
.attach-box h2{font-size:18px; margin:0 0 12px}
.attach-list{list-style:none; display:flex; flex-direction:column; gap:8px}
.attach-list a{display:flex; justify-content:space-between; gap:16px; align-items:center;
  padding:10px 14px; border:1px solid var(--line2); border-radius:10px; background:var(--card);
  color:var(--tx); text-decoration:none; cursor:pointer}
.attach-list a:hover{border-color:var(--gold); color:var(--gold); text-decoration:none}
.attach-name{min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.attach-dl{display:inline-flex; align-items:center; gap:7px; color:var(--teal); font-size:12.5px; white-space:nowrap; flex-shrink:0}
.attach-list a:hover .attach-dl{color:var(--gold)}
.attach-ico{width:18px; height:18px; flex-shrink:0; display:block}
.attach-ico-cut{stroke:var(--card)}
.attach-list a:hover .attach-ico-cut{stroke:var(--card)}
.dl-mask{position:fixed; top:0; right:0; bottom:0; left:0; background:rgba(8,12,18,.45);
  display:none; z-index:240; padding:20px}
.dl-mask.open{display:flex !important; align-items:center; justify-content:center}
.dl-box{position:relative; background:#fff; color:#333; border-radius:4px; width:min(520px,100%);
  box-shadow:0 12px 40px rgba(0,0,0,.25); padding:18px 20px 20px; font-family:inherit}
.dl-box .dl-title{font-size:14px; color:#888; margin:0 24px 12px 0}
.dl-box .dl-line{height:1px; background:#e8e8e8; margin-bottom:16px}
.dl-row{display:flex; align-items:center; gap:10px}
.dl-row input{flex:1; min-width:0; height:36px; border:1px solid #d0d0d0; border-radius:2px;
  padding:0 10px; font:inherit; font-size:15px; color:#222; background:#fff}
.dl-row input:focus{outline:none; border-color:#8aa}
.dl-row img{height:36px; width:auto; min-width:96px; border:1px solid #ddd; background:#eee; cursor:pointer; flex-shrink:0}
.dl-ok{height:36px; min-width:72px; border:none; border-radius:2px; background:#4caf50; color:#fff;
  font:inherit; font-size:15px; cursor:pointer; padding:0 16px; flex-shrink:0}
.dl-ok:hover{background:#43a047}
.dl-err{color:#d32f2f; font-size:13px; margin-top:10px; min-height:18px}
.dl-close{position:absolute; top:12px; right:12px; border:none; background:none; color:#999;
  font-size:20px; cursor:pointer; line-height:1; padding:0 4px}
@media(max-width:480px){
  .dl-row{flex-wrap:wrap}
  .dl-row input{flex:1 1 100%}
  .dl-row img{flex:1; height:40px; object-fit:contain}
  .dl-ok{flex:0 0 auto}
}
.post-cta{border-top:1px solid var(--line); padding:56px 24px 80px; text-align:center;
  background:radial-gradient(600px 260px at 50% 100%, rgba(233,180,76,.06), transparent 60%)}
.post-cta h3{font-size:22px; font-weight:600; margin-bottom:10px}
.post-cta p{color:var(--tx2); margin-bottom:24px}
.post-missing{padding:60px 0; text-align:center; color:var(--tx3)}

/* ===== 量化大脑落地页（v1.5） ===== */
body.qb-page .post-cta{display:none}
.qb-page .post-container{max-width:1080px; padding:120px 24px 48px}
.qb-shell{display:flex; flex-direction:column; gap:22px}
.qb-hero,.qb-card,.qb-panel{
  background:var(--card); border:1px solid var(--line); border-radius:22px;
  box-shadow:var(--shadow); position:relative; overflow:hidden}
.qb-hero{padding:42px 40px 36px; text-align:center;
  background:
    radial-gradient(520px 180px at 50% 0%, rgba(47,111,168,.10), transparent 60%),
    var(--card)}
.qb-hero h1{font-size:clamp(28px,4.8vw,44px); letter-spacing:-.02em; margin:0 0 14px}
.qb-hero .qb-tag{font-size:clamp(20px,3vw,28px); font-weight:700; color:#2F6FA8; margin:0 0 10px}
html[data-theme="dark"] .qb-hero .qb-tag{color:#5B9BD5}
.qb-hero .qb-lead{font-size:17px; color:var(--tx2); margin:0 0 14px}
.qb-hero .qb-disc{font-size:13px; color:var(--tx3); margin:0}
.qb-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px}
.qb-card{padding:26px 22px 22px; min-height:280px; display:flex; flex-direction:column}
.qb-ico{width:42px; height:42px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  background:rgba(47,111,168,.10); color:#2F6FA8; margin-bottom:16px}
.qb-ico svg{width:22px; height:22px}
.qb-card h2{font-size:20px; line-height:1.35; margin:0 0 12px; font-weight:700}
.qb-card p{font-size:14.5px; color:var(--tx2); margin:0; flex:1}
.qb-card ul{list-style:none; margin:0; padding:0; flex:1}
.qb-card li{position:relative; padding-left:14px; font-size:14.5px; color:var(--tx2); margin:0 0 8px}
.qb-card li:before{content:""; position:absolute; left:0; top:.72em; width:6px; height:6px; border-radius:50%; background:#2F6FA8}
.qb-card .qb-note{margin-top:14px; font-size:12.5px; color:var(--tx3); line-height:1.55}
.qb-deco{position:absolute; left:0; right:0; bottom:0; height:64px; pointer-events:none; opacity:.55}
.qb-panel{padding:28px 28px 26px}
.qb-panel h2{font-size:22px; margin:0 0 16px; display:flex; align-items:center; gap:10px}
.qb-panel h2 .qb-ico{width:34px; height:34px; margin:0; border-radius:10px}
.qb-panel h2 .qb-ico svg{width:18px; height:18px}
.qb-panel ul{margin:0; padding-left:1.15em; color:var(--tx2); font-size:14.5px}
.qb-panel li{margin:0 0 10px}
.qb-sub-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:22px; align-items:end}
.qb-sub-copy p{color:var(--tx2); font-size:14.5px; margin:0 0 16px}
.qb-sub-copy label{display:block; font-size:13px; color:var(--tx2); margin:0 0 8px}
.qb-sub-copy input{
  width:100%; padding:12px 14px; border-radius:12px; border:1px solid var(--line2);
  background:var(--bg2); color:var(--tx); font:inherit; font-size:15px}
.qb-sub-copy input:focus{outline:none; border-color:#2F6FA8}
.qb-sub-action{text-align:center}
.qb-sub-btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  width:100%; max-width:260px; padding:16px 22px; border:none; border-radius:14px;
  background:#2F7BFF; color:#fff; font:inherit; font-size:17px; font-weight:700;
  cursor:pointer; box-shadow:0 10px 24px rgba(47,123,255,.28); transition:.2s}
.qb-sub-btn:hover{background:#1F6AE8; transform:translateY(-1px)}
.qb-sub-btn:disabled{opacity:.6; cursor:wait; transform:none}
.qb-sub-btn svg{width:20px; height:20px}
.qb-sub-hint{margin:12px 0 0; font-size:12.5px; color:var(--tx3)}
.qb-sub-msg{min-height:20px; margin-top:10px; font-size:14px}
.qb-sub-msg.ok{color:var(--teal)}
.qb-sub-msg.err{color:var(--red)}
.qb-footnote{text-align:center; font-size:12.5px; color:var(--tx3); line-height:1.7; padding:8px 8px 24px}
@media(max-width:900px){
  .qb-grid{grid-template-columns:1fr}
  .qb-sub-grid{grid-template-columns:1fr}
  .qb-hero{padding:32px 22px 28px}
  .qb-panel{padding:22px}
  .qb-card{min-height:0}
}