:root{
  --bg:#F4F6FC;
  --bg2:#EEF1FA;
  --surface:#FFFFFF;
  --line:#E4E8F3;
  --line2:#D2D9EC;
  --text:#1A2036;
  --dim:#5B6480;
  --dim2:#8B93AB;
  --accent:#5A6CF6;
  --purple:#A855F7;
  --orange:#FF9A4D;
  --ok:#10A97C;
  --radius:20px;
  --shadow:0 12px 34px rgba(26,32,54,.08);
  --shadow-sm:0 6px 18px rgba(26,32,54,.06);
  --grad:linear-gradient(120deg,#5A6CF6,#A855F7 55%,#FF9A4D);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans CN",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
canvas#aurora{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;opacity:.9}
main,header,footer{position:relative;z-index:1}

/* ── 顶栏 ── */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(14px);
  background:rgba(244,246,252,.72);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
.nav.scrolled{border-bottom-color:var(--line);background:rgba(244,246,252,.86)}
.nav-inner{max-width:1140px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.2px}
.brand-mark{width:28px;height:28px;border-radius:9px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px;box-shadow:0 4px 12px rgba(90,108,246,.35)}
.brand-name{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:26px;margin-left:8px;font-size:14px;color:var(--dim);font-weight:500}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-cta{margin-left:auto}

/* ── 按钮 ── */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14px;border-radius:12px;padding:10px 16px;cursor:pointer;border:1px solid transparent;transition:transform .15s ease,box-shadow .2s,background .2s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(90,108,246,.28)}
.btn-primary:hover{box-shadow:0 12px 26px rgba(90,108,246,.4)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--line2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-lg{padding:13px 22px;font-size:15px;border-radius:14px}
.btn-block{display:flex;width:100%;justify-content:center;padding:13px}
.ver{font-weight:500;opacity:.85;font-size:13px}
.btn[aria-disabled="true"]{opacity:.5;pointer-events:none;filter:grayscale(.3)}

/* ── Hero ── */
.hero{max-width:1140px;margin:0 auto;padding:72px 24px 60px;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);background:rgba(90,108,246,.08);padding:6px 13px;border-radius:999px;margin-bottom:22px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(90,108,246,.12)}
.hero-title{font-size:clamp(34px,4.6vw,52px);line-height:1.08;font-weight:800;letter-spacing:-1px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:22px 0 30px;font-size:17px;color:var(--dim);max-width:30em;line-height:1.7}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-note{margin-top:18px;font-size:13px;color:var(--dim2)}

/* ── 仿真窗口 ── */
.hero-window{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden;transform:perspective(1400px) rotateY(-7deg) rotateX(2deg);transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.hero-window:hover{transform:perspective(1400px) rotateY(-3deg) rotateX(1deg)}
.win-title{height:42px;display:flex;align-items:center;padding:0 14px;background:linear-gradient(#fff,#fbfcff);border-bottom:1px solid var(--line)}
.lights{display:flex;gap:8px;margin-left:auto}
.lt{width:12px;height:12px;border-radius:50%}
.lt.close{background:#FF5F57}.lt.min{background:#FEBC2E}.lt.max{background:#28C840}
.win-title-text{font-size:13px;font-weight:600;color:var(--dim2);margin-right:auto;margin-left:6px}
.win-body{display:flex;height:330px}
.win-side{width:124px;background:#FAFBFF;border-right:1px solid var(--line);padding:12px 10px;display:flex;flex-direction:column;gap:4px}
.side-item{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:10px;font-size:13px;color:var(--dim);background:none;border:none;cursor:pointer;width:100%;text-align:left;transition:background .15s,color .15s}
.side-item svg{flex:none}
.side-item:hover{background:#fff}
.side-item.active{background:#fff;color:var(--accent);font-weight:600;box-shadow:var(--shadow-sm)}
.win-view{flex:1;padding:16px;overflow:hidden;position:relative;background:linear-gradient(180deg,#fff,#fcfdff)}
.view-panel{position:absolute;inset:16px;opacity:0;transform:translateY(8px);pointer-events:none;transition:opacity .35s,transform .35s;display:flex;flex-direction:column;gap:10px}
.view-panel.active{opacity:1;transform:none;pointer-events:auto}
.bubble{max-width:88%;padding:10px 13px;border-radius:14px;font-size:13px;line-height:1.5}
.bubble.user{align-self:flex-end;background:var(--grad);color:#fff;border-bottom-right-radius:5px}
.bubble.ai{align-self:flex-start;background:#F1F3FB;color:var(--text);border-bottom-left-radius:5px}
.ai-line{margin-bottom:5px}
.ai-tool{display:flex;align-items:center;gap:7px;color:var(--accent);font-weight:600;font-size:12.5px;background:rgba(90,108,246,.08);padding:6px 9px;border-radius:9px;width:fit-content}
.spin{width:11px;height:11px;border:2px solid rgba(90,108,246,.3);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.lib-row{display:flex;align-items:center;gap:9px;font-size:13px;padding:9px 11px;background:#F7F8FD;border-radius:10px}
.tag{font-size:11px;font-weight:700;color:var(--accent);background:rgba(90,108,246,.1);padding:2px 7px;border-radius:6px}
.lib-hint{font-size:12px;color:var(--dim2);margin-top:2px}
.task-row{font-size:13px}
.task-top{display:flex;justify-content:space-between;margin-bottom:6px;color:var(--dim);font-weight:500}
.task-pct{color:var(--accent);font-weight:700}
.bar{height:7px;background:#EDF0F8;border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--grad);border-radius:99px}
.local-card{background:linear-gradient(135deg,#EEF1FF,#F7F0FF);border:1px solid #E6E2FB;padding:18px;border-radius:14px}
.local-badge{display:inline-block;font-size:12px;font-weight:700;color:var(--purple);background:#fff;padding:4px 11px;border-radius:99px;margin-bottom:10px}
.local-card p{font-size:13.5px;color:var(--text)}
.me-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.me-avatar{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700}
.me-name{font-weight:700}
.me-sub{font-size:12px;color:var(--dim2)}
.me-row{display:flex;justify-content:space-between;font-size:13px;padding:9px 0;border-top:1px solid var(--line);color:var(--dim)}
.me-row b{color:var(--text);font-weight:600}

/* ── 通用 section ── */
.section{max-width:1140px;margin:0 auto;padding:84px 24px}
.section-tint{background:linear-gradient(180deg,rgba(238,241,250,.6),rgba(244,246,252,0));border-radius:32px;max-width:none}
.section-tint>*{max-width:1140px;margin-left:auto;margin-right:auto}
.sec-head{margin-bottom:46px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.6px;line-height:1.18;margin-top:14px}
.sec-sub{color:var(--dim);margin-top:14px;font-size:15.5px}

/* ── 功能卡片 ── */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow-sm);transition:transform .25s cubic-bezier(.2,.7,.2,1),box-shadow .25s,border-color .25s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line2)}
.card-ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;color:var(--accent);background:linear-gradient(135deg,rgba(90,108,246,.12),rgba(168,85,247,.1));margin-bottom:18px}
.card h3{font-size:17px;font-weight:700;margin-bottom:9px;letter-spacing:-.2px}
.card p{font-size:14px;color:var(--dim);line-height:1.65}

/* ── 下载 ── */
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.dl-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:border-color .25s,box-shadow .25s}
.dl-card:hover{box-shadow:var(--shadow);border-color:var(--line2)}
.dl-top{display:flex;align-items:center;gap:16px;margin-bottom:22px}
.dl-ic{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;color:#fff;flex:none}
.dl-ic.android{background:linear-gradient(135deg,#3DDC84,#1FA463)}
.dl-ic.win{background:linear-gradient(135deg,#5A6CF6,#7A5CF7)}
.dl-name{font-size:19px;font-weight:700}
.dl-meta{font-size:13px;color:var(--dim2);margin-top:2px}
.dl-spec{list-style:none;margin:0 0 22px}
.dl-spec li{display:flex;justify-content:space-between;padding:11px 0;border-top:1px solid var(--line);font-size:14px;color:var(--dim)}
.dl-spec li b{color:var(--text);font-weight:600}
.dl-foot{text-align:center;color:var(--dim2);font-size:13.5px;margin-top:26px}

/* ── 更新日志 ── */
.log{max-width:760px}
.log-item{position:relative;padding:0 0 30px 26px;border-left:2px solid var(--line)}
.log-item:last-child{border-left-color:transparent;padding-bottom:0}
.log-item::before{content:"";position:absolute;left:-7px;top:4px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--accent)}
.log-item.cur::before{border-color:var(--orange);box-shadow:0 0 0 4px rgba(255,154,77,.15)}
.log-v{font-size:17px;font-weight:700;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.log-date{font-size:12.5px;color:var(--dim2);font-weight:500}
.log-tag{font-size:11px;font-weight:700;color:#fff;background:var(--grad);padding:2px 9px;border-radius:99px}
.log-note{color:var(--dim);font-size:14.5px;margin-top:7px;line-height:1.6}
.log-empty{color:var(--dim2);font-size:14px;padding:20px 0}

/* ── 页脚 ── */
.foot{border-top:1px solid var(--line);margin-top:40px;background:rgba(255,255,255,.5)}
.foot-inner{max-width:1140px;margin:0 auto;padding:34px 24px 10px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot-links{display:flex;align-items:center;gap:22px;font-size:14px;color:var(--dim);font-weight:500}
.foot-links a:hover{color:var(--text)}
.foot-dim{color:var(--dim2);font-weight:400}
.foot-copy{text-align:center;font-size:12.5px;color:var(--dim2);padding:0 24px 30px}

/* ── 滚动揭示 ── */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ── 响应式 ── */
@media(max-width:900px){
  .hero{grid-template-columns:1fr;gap:40px;padding-top:48px}
  .hero-window{transform:none}
  .cards{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:1fr}
  .nav-links{display:none}
}
@media(max-width:560px){
  .cards{grid-template-columns:1fr}
  .section{padding:60px 20px}
  .hero{padding:40px 20px}
  .nav-inner{padding:12px 18px}
  .br-m{display:none}
}
@media(prefers-reduced-motion:reduce){
  .reveal{transition:none;opacity:1;transform:none}
  .hero-window{transition:none}
  .spin{animation:none}
}