/* ===== ConfigNexus 官网共用样式 · 白色玻璃拟态 ===== */
:root{
  --bg:#F4F5F7;
  --ink:#1D1D1F;
  --ink-dim:#6E6E73;
  --ink-faint:#9b9ba1;
  --acc:#0071E3;
  --acc-deep:#0058b9;
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --glass-brd:rgba(255,255,255,.75);
  --hair:rgba(0,0,0,.08);
  --grid:rgba(0,0,0,.028);
  --shadow:0 10px 40px -12px rgba(20,28,48,.18);
  --shadow-lg:0 30px 80px -28px rgba(20,28,48,.32);
  --sans:'Noto Sans SC','Manrope',-apple-system,BlinkMacSystemFont,'SF Pro Display',system-ui,sans-serif;
  --disp:'Manrope','Noto Sans SC',-apple-system,system-ui,sans-serif;
  --cell:38px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:radial-gradient(ellipse 110% 80% at 50% -8%,#fbfcfe,#EEF0F4 70%);
  color:var(--ink);font-family:var(--sans);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}

/* ── 背景：纯格子（无柔光团） ── */
.bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg .grid{position:absolute;inset:0;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:var(--cell) var(--cell)}
/* ── 流光交互画布（跟随鼠标，沿格子线向四周射出） ── */
#fx{position:fixed;inset:0;z-index:1;pointer-events:none;display:block}

.wrap{position:relative;z-index:2;max-width:1120px;margin:0 auto;padding:0 28px}

/* ── 导航 ── */
header{position:sticky;top:14px;z-index:50;margin:14px auto 0;max-width:1120px;padding:0 14px}
.nav{display:flex;align-items:center;justify-content:space-between;height:58px;
  padding:0 12px 0 18px;border-radius:16px;background:var(--glass-strong);
  -webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);
  border:1px solid var(--glass-brd);box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--disp);font-weight:700;
  font-size:17px;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.brand .mark{width:24px;height:24px;display:grid;grid-template-columns:1fr 1fr;
  grid-template-rows:1fr 1fr;gap:2.5px}
.brand .mark i{background:#cfd4dc;border-radius:2px}
.brand .mark i:nth-child(1){background:var(--acc)}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a{color:var(--ink-dim);text-decoration:none;font-size:14.5px;font-weight:500;
  padding:8px 14px;border-radius:10px;transition:all .2s}
.nav-links a:hover{color:var(--ink);background:rgba(0,0,0,.04)}
.nav-links a.active{color:var(--ink);background:rgba(0,0,0,.05)}
.nav-cta{background:var(--acc);color:#fff!important;font-weight:600}
.nav-cta:hover{background:var(--acc-deep)!important;color:#fff!important}
@media(max-width:720px){.nav-links a:not(.nav-cta){display:none}}

/* ── 按钮 ── */
.btn{font-size:15px;font-weight:600;text-decoration:none;padding:13px 28px;border-radius:13px;
  transition:all .22s;display:inline-flex;align-items:center;gap:9px;cursor:pointer;border:none}
.btn-primary{background:var(--acc);color:#fff;box-shadow:0 8px 24px -6px rgba(0,113,227,.5)}
.btn-primary:hover{background:var(--acc-deep);transform:translateY(-2px);
  box-shadow:0 14px 34px -8px rgba(0,113,227,.55)}
.btn-ghost{background:var(--glass-strong);-webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);border:1px solid var(--glass-brd);color:var(--ink);box-shadow:var(--shadow)}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-disabled{background:rgba(0,0,0,.06);color:var(--ink-faint);cursor:not-allowed;
  box-shadow:none;border:1px solid var(--hair)}
.btn-disabled:hover{transform:none;background:rgba(0,0,0,.06)}

/* ── 通用玻璃卡 ── */
.glasscard{background:var(--glass);-webkit-backdrop-filter:blur(20px) saturate(160%);
  backdrop-filter:blur(20px) saturate(160%);border:1px solid var(--glass-brd);
  border-radius:20px;box-shadow:var(--shadow)}

/* ── 子页头部 ── */
.pagehead{text-align:center;padding:96px 0 18px}
.pagehead .tag{font-size:13px;font-weight:600;color:var(--acc);letter-spacing:.04em}
.pagehead h1{font-family:var(--disp);font-size:clamp(32px,5.4vw,54px);font-weight:800;
  letter-spacing:-.02em;margin:12px 0 16px;color:#16171a}
.pagehead p{font-size:clamp(15px,2vw,18px);color:var(--ink-dim);max-width:600px;margin:0 auto;line-height:1.7}

/* ── 页脚 ── */
footer{border-top:1px solid var(--hair);padding:38px 0;position:relative;z-index:2;margin-top:40px}
.foot{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.foot .c{font-size:13.5px;color:var(--ink-faint)}
.foot .lk{display:flex;gap:8px}
.foot .lk a{color:var(--ink-dim);text-decoration:none;font-size:13.5px;font-weight:500;
  padding:6px 12px;border-radius:9px;transition:all .2s}
.foot .lk a:hover{color:var(--acc);background:rgba(0,0,0,.04)}

/* ── 加载动画 ── */
.reveal{opacity:0;transform:translateY(16px);animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards}
@keyframes rise{to{opacity:1;transform:none}}
.d1{animation-delay:.05s}.d2{animation-delay:.15s}.d3{animation-delay:.25s}
.d4{animation-delay:.35s}.d5{animation-delay:.5s}
@media(prefers-reduced-motion:reduce){.reveal{animation:none;opacity:1;transform:none}}

/* ===== 首页 ===== */
.hero{padding:84px 0 50px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:500;
  color:var(--acc-deep);background:var(--glass);-webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);border:1px solid var(--glass-brd);padding:7px 15px;
  border-radius:100px;margin-bottom:28px;box-shadow:var(--shadow)}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--acc);
  box-shadow:0 0 0 3px rgba(0,113,227,.18)}
h1.hero-h{font-family:var(--disp);font-weight:800;letter-spacing:-.02em;
  font-size:clamp(36px,6.4vw,68px);line-height:1.08;margin-bottom:22px;color:#16171a}
.hl{background:linear-gradient(120deg,#0071E3,#7c5cff 60%,#00b8a3);
  -webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.sub{font-size:clamp(15px,2vw,19px);color:var(--ink-dim);max-width:630px;font-weight:400;
  margin:0 auto 36px;line-height:1.75}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.shot{margin-top:60px;border-radius:22px;overflow:hidden;background:var(--glass);
  -webkit-backdrop-filter:blur(24px) saturate(160%);backdrop-filter:blur(24px) saturate(160%);
  border:1px solid var(--glass-brd);box-shadow:var(--shadow-lg)}
.shot-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid var(--hair)}
.shot-bar i{width:12px;height:12px;border-radius:50%}
.shot-bar i:nth-child(1){background:#ff5f57}.shot-bar i:nth-child(2){background:#febc2e}
.shot-bar i:nth-child(3){background:#28c840}
.shot-bar .tt{margin-left:10px;font-size:13px;color:var(--ink-faint);font-weight:500}
.shot-body{aspect-ratio:16/9;display:grid;place-items:center;position:relative;
  background:linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px),
    linear-gradient(180deg,rgba(255,255,255,.4),rgba(255,255,255,.12));
  background-size:30px 30px,30px 30px,100% 100%}
.shot-body .ph{text-align:center;line-height:2;color:var(--ink-faint);font-size:14px}
.shot-body .ph b{color:var(--ink-dim);font-weight:600}

.formats{padding:52px 0 6px;text-align:center}
.formats .lbl{font-size:12.5px;color:var(--ink-faint);letter-spacing:.1em;text-transform:uppercase;
  font-weight:600;margin-bottom:20px}
.fmt-row{display:flex;flex-wrap:wrap;gap:10px 12px;justify-content:center}
.fmt{font-size:13.5px;font-weight:500;color:var(--ink-dim);background:var(--glass);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-brd);
  padding:9px 17px;border-radius:11px;transition:all .2s;box-shadow:0 4px 14px -8px rgba(20,28,48,.2)}
.fmt:hover{color:var(--acc);transform:translateY(-2px);box-shadow:var(--shadow)}

.section{padding:86px 0}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head .tag{font-size:13px;font-weight:600;color:var(--acc);letter-spacing:.04em}
.sec-head h2{font-family:var(--disp);font-size:clamp(28px,4.4vw,42px);font-weight:800;
  margin-top:10px;letter-spacing:-.02em;color:#16171a}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:840px){.cards{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.cards{grid-template-columns:1fr}}
.card{background:var(--glass);-webkit-backdrop-filter:blur(20px) saturate(160%);
  backdrop-filter:blur(20px) saturate(160%);border:1px solid var(--glass-brd);border-radius:20px;
  padding:30px 28px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
a.card{text-decoration:none;color:inherit;display:block}
.card .ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  margin-bottom:18px;font-size:20px;color:#fff;background:linear-gradient(135deg,#3a9bff,#0071E3);
  box-shadow:0 8px 18px -6px rgba(0,113,227,.5)}
.card h3{font-size:18.5px;font-weight:700;margin-bottom:10px;letter-spacing:-.01em}
.card p{font-size:14.5px;color:var(--ink-dim);line-height:1.7}

.endwrap{padding:40px 0 96px}
.endcta{text-align:center;padding:72px 32px;border-radius:28px;position:relative;overflow:hidden;
  background:var(--glass);-webkit-backdrop-filter:blur(24px) saturate(160%);
  backdrop-filter:blur(24px) saturate(160%);border:1px solid var(--glass-brd);box-shadow:var(--shadow-lg)}
.endcta::before{content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(circle at 30% 0%,rgba(124,92,255,.22),transparent 55%),
    radial-gradient(circle at 80% 100%,rgba(0,184,163,.2),transparent 55%)}
.endcta h2{font-family:var(--disp);font-size:clamp(28px,4.6vw,44px);font-weight:800;
  margin-bottom:14px;letter-spacing:-.02em;color:#16171a}
.endcta p{color:var(--ink-dim);margin-bottom:30px;font-size:16.5px}

/* ===== 功能页 ===== */
.feat-list{display:flex;flex-direction:column;gap:22px;padding:30px 0 20px}
.feat-row{display:grid;grid-template-columns:54px 1fr;gap:22px;align-items:start;
  padding:30px 32px;border-radius:20px;background:var(--glass);
  -webkit-backdrop-filter:blur(20px) saturate(160%);backdrop-filter:blur(20px) saturate(160%);
  border:1px solid var(--glass-brd);box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s}
.feat-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.feat-row .ic{width:54px;height:54px;border-radius:15px;display:grid;place-items:center;
  font-size:24px;color:#fff;background:linear-gradient(135deg,#3a9bff,#0071E3);
  box-shadow:0 10px 22px -8px rgba(0,113,227,.55)}
.feat-row h3{font-size:20px;font-weight:700;margin-bottom:8px;letter-spacing:-.01em}
.feat-row p{font-size:15px;color:var(--ink-dim);line-height:1.75}
.feat-row .meta{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}
.feat-row .meta span{font-size:12.5px;color:var(--acc-deep);background:rgba(0,113,227,.08);
  border:1px solid rgba(0,113,227,.15);padding:4px 11px;border-radius:8px;font-weight:500}
@media(max-width:560px){.feat-row{grid-template-columns:1fr}.feat-row .ic{margin-bottom:4px}}

/* ===== 下载页 ===== */
.dl-hero{display:flex;flex-direction:column;align-items:center;text-align:center;
  padding:40px 0 20px}
.dl-card{width:100%;max-width:640px;padding:44px 40px;text-align:center;border-radius:24px}
.dl-card .ver{font-size:13.5px;color:var(--ink-faint);font-weight:500;margin-bottom:8px}
.dl-card h2{font-family:var(--disp);font-size:26px;font-weight:800;margin-bottom:8px;letter-spacing:-.01em}
.dl-card .note{font-size:14px;color:var(--ink-dim);margin:18px auto 0;max-width:420px;line-height:1.7}
.dl-meta{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin-top:24px;
  padding-top:22px;border-top:1px solid var(--hair)}
.dl-meta div{text-align:center}
.dl-meta .k{font-size:12px;color:var(--ink-faint);font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.dl-meta .v{font-size:15px;color:var(--ink);font-weight:600;margin-top:4px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:50px}
@media(max-width:680px){.steps{grid-template-columns:1fr}}
.step{padding:26px 24px;border-radius:18px}
.step .n{font-family:var(--disp);font-size:14px;font-weight:800;color:#fff;width:30px;height:30px;
  border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,#3a9bff,#0071E3);
  margin-bottom:14px}
.step h4{font-size:16px;font-weight:700;margin-bottom:6px}
.step p{font-size:14px;color:var(--ink-dim);line-height:1.65}

/* ===== 文档页 ===== */
.doc-layout{display:grid;grid-template-columns:220px 1fr;gap:40px;padding:20px 0 40px}
@media(max-width:820px){.doc-layout{grid-template-columns:1fr}.doc-toc{display:none}}
.doc-toc{position:sticky;top:90px;align-self:start;padding:20px;border-radius:16px}
.doc-toc .t{font-size:12px;font-weight:700;color:var(--ink-faint);letter-spacing:.08em;
  text-transform:uppercase;margin-bottom:12px}
.doc-toc a{display:block;color:var(--ink-dim);text-decoration:none;font-size:14px;
  padding:7px 10px;border-radius:8px;transition:all .2s}
.doc-toc a:hover{color:var(--acc);background:rgba(0,0,0,.04)}
.doc-body{max-width:720px}
.doc-sec{padding:30px 34px;border-radius:20px;margin-bottom:22px;background:var(--glass);
  -webkit-backdrop-filter:blur(20px) saturate(160%);backdrop-filter:blur(20px) saturate(160%);
  border:1px solid var(--glass-brd);box-shadow:var(--shadow)}
.doc-sec h2{font-family:var(--disp);font-size:24px;font-weight:800;margin-bottom:14px;
  letter-spacing:-.01em;scroll-margin-top:90px}
.doc-sec h3{font-size:17px;font-weight:700;margin:20px 0 8px}
.doc-sec p{font-size:15px;color:var(--ink-dim);line-height:1.8;margin-bottom:12px}
.doc-sec ul,.doc-sec ol{margin:0 0 12px 20px;color:var(--ink-dim);font-size:15px;line-height:1.8}
.doc-sec li{margin-bottom:6px}
.doc-sec code{font-family:'Manrope',ui-monospace,monospace;background:rgba(0,0,0,.055);
  padding:2px 7px;border-radius:6px;font-size:13.5px;color:var(--acc-deep)}
.doc-sec strong{color:var(--ink);font-weight:600}
.callout{display:flex;gap:12px;padding:16px 18px;border-radius:13px;
  background:rgba(0,113,227,.07);border:1px solid rgba(0,113,227,.16);margin:14px 0;
  font-size:14px;color:var(--ink-dim);line-height:1.7}
.callout b{color:var(--acc-deep)}

/* ===== 文档页（教程浏览） ===== */
.doc-app{display:grid;grid-template-columns:248px 1fr;gap:26px;padding:96px 0 20px;align-items:start}
@media(max-width:860px){.doc-app{grid-template-columns:1fr;padding-top:88px}}
.doc-side{padding:30px 14px 18px;position:sticky;top:88px;max-height:calc(100vh - 110px);overflow-y:auto}
@media(max-width:860px){.doc-side{position:static;max-height:340px}}
.doc-group{margin-bottom:14px}
.doc-group:first-child{margin-top:0}
.doc-group:first-child .doc-group-t{padding-top:0}
.doc-group-t{font-size:12px;font-weight:700;color:var(--ink-faint);letter-spacing:.06em;
  padding:6px 12px;text-transform:uppercase}
.doc-link{display:flex;align-items:center;gap:7px;color:var(--ink-dim);text-decoration:none;
  font-size:14px;padding:8px 12px;border-radius:9px;transition:all .18s}
.doc-link:hover{color:var(--ink);background:rgba(0,0,0,.04)}
.doc-link.active{color:var(--acc);background:rgba(0,113,227,.09);font-weight:600}
.doc-dlc{font-size:10px;font-weight:700;color:#c2410c;background:rgba(234,88,12,.13);
  padding:1px 6px;border-radius:5px;letter-spacing:.04em}
.doc-main{min-width:0}
.doc-article{padding:30px 44px 40px;min-height:60vh}
@media(max-width:560px){.doc-article{padding:24px 22px}}
.doc-article .nt-h1{margin-top:0}

/* Markdown 渲染样式 */
.nt-h1{font-family:var(--disp);font-size:30px;font-weight:800;letter-spacing:-.02em;
  color:#16171a;margin:0 0 18px;padding-bottom:14px;border-bottom:1px solid var(--hair)}
.nt-h2{font-family:var(--disp);font-size:22px;font-weight:700;color:#16171a;margin:30px 0 12px}
.nt-h3{font-size:18px;font-weight:700;color:var(--ink);margin:22px 0 8px}
.nt-h4{font-size:16px;font-weight:600;color:var(--ink);margin:18px 0 6px}
.nt-h5,.nt-h6{font-size:14px;font-weight:600;color:var(--ink-dim);margin:14px 0 4px}
.nt-p{font-size:15px;color:var(--ink-dim);line-height:1.85;margin:0 0 12px}
.doc-article strong{color:var(--ink);font-weight:600}
.nt-list{margin:0 0 14px 22px;color:var(--ink-dim);font-size:15px;line-height:1.85}
.nt-list li{margin-bottom:5px}
.nt-code-inline{font-family:ui-monospace,'SFMono-Regular',Menlo,monospace;background:rgba(0,0,0,.06);
  padding:2px 7px;border-radius:6px;font-size:13px;color:var(--acc-deep)}
.nt-code-wrap{margin:14px 0;border-radius:12px;overflow:hidden;border:1px solid var(--hair);
  background:#0f1115}
.nt-code-head{font-family:ui-monospace,monospace;font-size:12px;color:#9aa2ad;
  padding:8px 14px;border-bottom:1px solid rgba(255,255,255,.07);background:#14171c}
.nt-code{margin:0;padding:16px;overflow-x:auto}
.nt-code code{font-family:ui-monospace,'SFMono-Regular',Menlo,monospace;font-size:13px;
  color:#e6e8eb;line-height:1.7;white-space:pre}
.nt-table-wrap{margin:14px 0;overflow-x:auto;border:1px solid var(--hair);border-radius:12px}
.nt-table{width:100%;border-collapse:collapse;font-size:14px}
.nt-table th{background:rgba(0,0,0,.035);color:var(--ink);font-weight:600;text-align:left;
  padding:10px 14px;border-bottom:1px solid var(--hair);white-space:nowrap}
.nt-table td{padding:10px 14px;color:var(--ink-dim);border-bottom:1px solid var(--hair)}
.nt-table tr:last-child td{border-bottom:none}
.nt-callout{display:flex;gap:12px;padding:14px 16px;border-radius:13px;margin:14px 0;
  font-size:14px;line-height:1.75}
.nt-callout-ic{font-size:18px;line-height:1.4}
.nt-callout-body{flex:1;min-width:0}
.nt-callout-body p{margin:0 0 6px}.nt-callout-body p:last-child{margin:0}
.nt-callout-body ul{margin:4px 0 0 18px}
.nt-blue{background:rgba(0,113,227,.07);border:1px solid rgba(0,113,227,.18);color:var(--ink-dim)}
.nt-green{background:rgba(16,185,129,.08);border:1px solid rgba(16,185,129,.22);color:var(--ink-dim)}
.nt-yellow{background:rgba(234,179,8,.1);border:1px solid rgba(234,179,8,.28);color:var(--ink-dim)}
.nt-red{background:rgba(239,68,68,.07);border:1px solid rgba(239,68,68,.2);color:var(--ink-dim)}
.video-player-container{margin:16px 0}
.video-player-wrapper{border-radius:14px;overflow:hidden;border:1px solid var(--glass-brd);
  box-shadow:var(--shadow);background:#000}
.video-player{display:block;width:100%}
.video-error,.image-error{padding:40px;text-align:center;color:var(--ink-faint);font-size:14px;background:var(--panel,#eee)}
.video-caption,.gif-caption{text-align:center;font-size:13px;color:var(--ink-faint);margin-top:8px}
.gif-demo-container{margin:16px 0;text-align:center}
.gif-demo{max-width:100%;border-radius:14px;border:1px solid var(--glass-brd);box-shadow:var(--shadow)}

/* ===== 开场小游戏（仅首页） ===== */
.intro-overlay{position:fixed;inset:0;z-index:1000;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:16px;
  background:radial-gradient(ellipse 110% 80% at 50% 0%,#fbfcfe,#E9ebF0 72%);
  transition:opacity .6s ease}
.intro-overlay.hide{opacity:0;pointer-events:none}
.intro-brand{font-family:var(--disp);font-weight:800;font-size:21px;letter-spacing:-.01em;color:#16171a}
.intro-brand span{background:linear-gradient(120deg,#0071E3,#7c5cff 60%,#00b8a3);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.intro-hint{font-size:13.5px;color:var(--ink-dim);font-weight:500;text-align:center}
.intro-hint b{color:var(--acc-deep);font-weight:600}
.intro-board{border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg);
  border:1px solid var(--glass-brd);background:rgba(255,255,255,.45);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);display:block}
.intro-skip{position:fixed;top:20px;right:24px;z-index:1001;font-size:13px;color:var(--ink-faint);
  font-weight:600;cursor:pointer;padding:7px 14px;border-radius:10px;border:1px solid var(--hair);
  background:var(--glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .2s}
.intro-skip:hover{color:var(--ink);border-color:var(--ink-faint)}

.bubble{position:fixed;z-index:1001;background:var(--glass-strong);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--glass-brd);box-shadow:var(--shadow);
  padding:9px 15px;border-radius:14px 14px 14px 3px;font-size:14px;color:var(--ink);
  font-weight:500;white-space:nowrap;pointer-events:none;
  animation:bubbleUp 2.8s ease forwards}
@keyframes bubbleUp{
  0%{opacity:0;transform:translate(-50%,10px) scale(.92)}
  14%{opacity:1;transform:translate(-50%,0) scale(1)}
  78%{opacity:1}
  100%{opacity:0;transform:translate(-50%,-52px) scale(1)}}

.reveal-screen{position:fixed;inset:0;z-index:1002;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:30px;
  opacity:0;animation:revealIn .85s cubic-bezier(.2,.7,.2,1) forwards}
@keyframes revealIn{0%{opacity:0;transform:scale(1.07);filter:blur(10px)}
  100%{opacity:1;transform:none;filter:none}}
.reveal-screen.A{background:radial-gradient(ellipse at 50% 28%,#eaf3ff,#dde8f7 72%)}
.reveal-screen.B{background:radial-gradient(ellipse at 50% 28%,#fff1e7,#ffe1cf 72%)}
.reveal-tag{font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  padding:7px 16px;border-radius:100px;margin-bottom:22px;animation:riseIn .6s both}
.reveal-screen.A .reveal-tag{color:#0058b9;background:rgba(0,113,227,.1)}
.reveal-screen.B .reveal-tag{color:#c2410c;background:rgba(234,88,12,.13)}
.reveal-title{font-family:var(--disp);font-weight:800;font-size:clamp(30px,6.4vw,58px);
  letter-spacing:-.02em;color:#16171a;margin-bottom:18px;line-height:1.12;
  animation:riseIn .7s .12s both}
.reveal-text{max-width:560px;font-size:clamp(15px,2.2vw,18px);color:var(--ink-dim);
  line-height:1.85;margin-bottom:34px;animation:riseIn .7s .26s both}
@keyframes riseIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
.reveal-btn{animation:riseIn .7s .4s both}
.btn-orange{background:#ea580c;color:#fff;box-shadow:0 8px 24px -6px rgba(234,88,12,.5)}
.btn-orange:hover{background:#c2410c;transform:translateY(-2px);
  box-shadow:0 14px 34px -8px rgba(234,88,12,.55)}
@media(prefers-reduced-motion:reduce){
  .bubble,.reveal-screen,.reveal-title,.reveal-text,.reveal-btn,.reveal-tag{animation:none;opacity:1}}

/* ===== 卡片跟随鼠标的光斑（交互微动效） ===== */
.card,.feat-row,.step,.dl-card,.glasscard{position:relative;overflow:hidden}
.card::after,.feat-row::after,.step::after,.dl-card::after{content:"";position:absolute;
  inset:0;pointer-events:none;opacity:0;transition:opacity .35s;border-radius:inherit;
  background:radial-gradient(220px circle at var(--cx,50%) var(--cy,50%),
    rgba(0,113,227,.14),transparent 60%)}
.card:hover::after,.feat-row:hover::after,.step:hover::after,.dl-card:hover::after{opacity:1}

/* 格式标签：点按回弹 */
.fmt:active{transform:translateY(0) scale(.94)}
/* 导航 logo 方块：悬停时第一格点亮扩散 */
.brand:hover .mark i{background:#aeb6c2}
.brand:hover .mark i:nth-child(1){background:var(--acc)}
.brand:hover .mark i:nth-child(4){background:var(--acc);transition-delay:.05s}
.brand .mark i{transition:background .25s}
/* 主按钮：箭头轻微下移提示 */
.btn-primary:hover{letter-spacing:.005em}
/* 进入视口淡入（滚动触发） */
.inview{opacity:0;transform:translateY(22px)}
.inview.show{opacity:1;transform:none;transition:opacity .7s cubic-bezier(.2,.7,.2,1),
  transform .7s cubic-bezier(.2,.7,.2,1)}
@media(prefers-reduced-motion:reduce){.inview{opacity:1;transform:none}}