/* 蛋壳拍剪官网 —— 和软件同一套调性：暖白纸面、陶土强调、衬线标题。
   不加载外部字体和脚本（国内访问稳定），全部用系统字体。 */
:root{
  --bg:#FAF9F5; --paper:#F3F1EA; --surface:#FFFFFF; --ink:#141413; --ink-2:#3D3D3A; --muted:#73726C; --faint:#A8A69D;
  --line:#E8E6DC; --line-strong:#DAD8CE; --clay:#C96442; --clay-2:#D97757; --clay-soft:rgba(201,100,66,.1); --stage:#1F1E1D; --stage-ink:#F0EEE6;
  --serif:"Tiempos Headline",ui-serif,"New York",Georgia,"Songti SC","Noto Serif SC","Source Han Serif SC","STSong",serif;
  --serif-num:"Songti SC","Noto Serif SC","Source Han Serif SC","STSong",Georgia,serif; /* 数字用宋体：等高数字，不会高低不齐 */
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);     /* 快出慢收：主要的进场曲线 */
  --ease-in-out:cubic-bezier(.65,0,.35,1);
  --gutter:clamp(20px,5vw,72px);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden;overflow-x:clip;max-width:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--clay-soft)}

/* ── 通用 ── */
.kicker{margin:0 0 14px;font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--clay)}
.title{font-family:var(--serif);font-weight:500;font-size:clamp(34px,4.6vw,60px);line-height:1.18;letter-spacing:-.01em;margin:0}
.title.light{color:var(--stage-ink)}
.sub{color:var(--muted);font-size:clamp(15px,1.3vw,18px);line-height:1.75;max-width:560px;margin:18px 0 0}
.sub.light{color:#A8A69D}
.section-head{max-width:760px}
.btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 22px;border-radius:12px;font-weight:600;font-size:15px;transition:transform .5s var(--ease),background .25s,box-shadow .4s var(--ease),color .25s;will-change:transform}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.98)}
.btn-clay{background:var(--clay);color:#fff;box-shadow:0 1px 2px rgba(150,60,30,.2),0 8px 24px -8px rgba(201,100,66,.55)}
.btn-clay:hover{background:#B5573A;box-shadow:0 1px 2px rgba(150,60,30,.2),0 14px 32px -10px rgba(201,100,66,.6)}
.btn-dark{background:var(--ink);color:var(--bg)}
.btn-ghost{color:var(--ink-2)}
.btn-ghost .arrow{display:inline-block;transition:transform .5s var(--ease)}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-ivory{background:var(--stage-ink);color:var(--ink)}
.btn-ivory small{font-weight:500;color:var(--muted);font-size:12px}
.btn-outline-light{border:1px solid rgba(240,238,230,.28);color:var(--stage-ink);background:transparent;font:inherit;font-weight:600;font-size:15px;cursor:pointer}
.btn-outline-light:hover{background:rgba(240,238,230,.08)}

/* 进场：默认藏起来，进入视口加 .in。--d 控制先后 */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity 1s var(--ease) var(--d,0s),transform 1.2s var(--ease) var(--d,0s)}
[data-reveal].in{opacity:1;transform:none}
/* 标题逐字：每个字从下方遮罩里升起 */
[data-split] .ch{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.08em;margin-bottom:-.08em}
[data-split] .ch>span{display:inline-block;transform:translateY(105%) rotate(4deg);transform-origin:0 100%;transition:transform 1.1s var(--ease) calc(var(--i)*38ms + .1s)}
[data-split].in .ch>span{transform:none}

/* ── 导航 ── */
.nav{position:fixed;inset:0 0 auto;z-index:50;height:68px;display:flex;align-items:center;gap:28px;padding:0 var(--gutter);transition:transform .6s var(--ease),background .4s,box-shadow .4s,backdrop-filter .4s}
.nav.scrolled{background:rgba(250,249,245,.78);backdrop-filter:saturate(1.4) blur(18px);-webkit-backdrop-filter:saturate(1.4) blur(18px);box-shadow:0 1px 0 var(--line)}
.nav.hide{transform:translateY(-100%)}
.nav-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:19px;font-weight:600}
.nav-brand img{width:32px;height:32px;border-radius:8px}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14.5px;color:var(--ink-2)}
.nav-links a{position:relative;padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:1.5px;background:var(--clay);transform:scaleX(0);transform-origin:right;transition:transform .5s var(--ease)}
.nav-links a:hover::after{transform:scaleX(1);transform-origin:left}
.nav-cta{height:38px;padding:0 16px;font-size:14px;border-radius:10px}

/* ── 首屏 ── */
.hero{position:relative;padding:calc(68px + clamp(56px,10vh,120px)) var(--gutter) 0;text-align:center}
.hero-glow{position:absolute;left:50%;top:38%;width:min(1200px,120vw);aspect-ratio:2/1;transform:translate(-50%,-50%);background:radial-gradient(closest-side,rgba(217,119,87,.16),rgba(217,119,87,.05) 55%,transparent);pointer-events:none;filter:blur(10px)}
.hero-copy{position:relative;max-width:900px;margin:0 auto}
.pill{display:inline-flex;align-items:center;gap:8px;margin:0 0 26px;padding:6px 14px;border:1px solid var(--line-strong);border-radius:20px;background:rgba(255,255,255,.6);font-size:13px;color:var(--ink-2)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--clay);box-shadow:0 0 0 0 rgba(201,100,66,.5);animation:pulse 2.4s var(--ease-in-out) infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(201,100,66,.45)}70%{box-shadow:0 0 0 9px rgba(201,100,66,0)}100%{box-shadow:0 0 0 0 rgba(201,100,66,0)}}
.display{font-family:var(--serif);font-weight:500;font-size:clamp(48px,8.4vw,116px);line-height:1.08;letter-spacing:-.02em;margin:0}
.lede{margin:28px auto 0;max-width:620px;font-size:clamp(16px,1.45vw,19px);line-height:1.8;color:var(--muted)}
.hero-actions{display:flex;justify-content:center;gap:10px;margin-top:34px;flex-wrap:wrap}
.hero-stage{position:relative;max-width:1180px;margin:clamp(56px,8vh,96px) auto 0;perspective:1600px}
.window{margin:0;border-radius:16px;overflow:hidden;background:var(--paper);border:1px solid rgba(20,20,19,.08);box-shadow:0 2px 6px rgba(20,20,19,.05),0 40px 100px -30px rgba(60,40,30,.35)}
/* 首屏窗口：从下方浮上来，带一点弹性回落；不做任何变形 */
#hero-window.pop{opacity:0;transform:translateY(72px) scale(.965);filter:blur(6px);transition:opacity 1.1s var(--ease) .55s,transform 1.6s cubic-bezier(.2,1.25,.35,1) .55s,filter 1s var(--ease) .55s}
.loaded #hero-window.pop{opacity:1;transform:none;filter:none}
.chip-par{position:absolute;will-change:transform;z-index:2}
.window-bar{height:30px;display:flex;align-items:center;gap:7px;padding:0 13px;background:#F0EEE6;border-bottom:1px solid var(--line)}
.window-bar i{width:11px;height:11px;border-radius:50%;background:#E0DDD3}
.window-bar i:nth-child(1){background:#EE6A5F}.window-bar i:nth-child(2){background:#F5BD4F}.window-bar i:nth-child(3){background:#61C454}
.float-chip{position:relative;display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:14px;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(20,20,19,.06);box-shadow:0 20px 50px -20px rgba(60,40,30,.35);font-size:14px;color:var(--ink-2);white-space:nowrap;will-change:transform;opacity:0;transition:opacity 1s var(--ease) 1.1s}
.float-chip{transform:translateY(18px) scale(.86);transition:opacity .7s var(--ease) var(--d,1.2s),transform 1.1s cubic-bezier(.2,1.5,.4,1) var(--d,1.2s)!important}
.loaded .float-chip{opacity:1;transform:none}
.float-chip b{font-family:var(--serif-num);font-size:22px;color:var(--clay);font-weight:600}
.float-chip .ok{width:18px;height:18px;border-radius:50%;background:#3F8A5A;position:relative}
.float-chip .ok::after{content:"";position:absolute;left:6px;top:3.5px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.chip-par.c1{left:-3%;top:22%}.chip-par.c2{right:-4%;top:38%}.chip-par.c3{left:6%;bottom:12%}

/* ── 主张：逐字点亮 ── */
.statement{padding:clamp(140px,22vh,260px) var(--gutter)}
.statement-text{max-width:1020px;margin:0 auto;font-family:var(--serif);font-weight:500;font-size:clamp(30px,4.4vw,58px);line-height:1.4;letter-spacing:-.005em}
.statement-text .w{opacity:.14;transition:opacity .3s linear}
.statement-text .w.on{opacity:1}
.statement-text .w.accent.on{color:var(--clay)}

/* ── 四步 ── */
.how{position:relative;height:420vh}
.how-sticky{position:sticky;top:0;height:100vh;display:grid;grid-template-columns:minmax(320px,.9fr) 1.3fr;gap:clamp(32px,5vw,80px);align-items:center;padding:68px var(--gutter) 0;max-width:1440px;margin:0 auto}
.steps{list-style:none;padding:0;margin:40px 0 0;display:grid;gap:6px}
.step{display:flex;gap:18px;padding:16px 18px;border-radius:14px;opacity:.38;transition:opacity .6s var(--ease),background .6s var(--ease),transform .7s var(--ease);transform:translateX(0)}
.step.active{opacity:1;background:var(--surface);box-shadow:0 1px 2px rgba(20,20,19,.04),0 12px 40px -18px rgba(60,40,30,.25);transform:translateX(6px)}
.step-no{font-family:var(--serif-num);font-size:15px;color:var(--clay);padding-top:2px;font-variant-numeric:tabular-nums}
.step b{font-size:17px;font-weight:600}
.step p{margin:6px 0 0;font-size:14.5px;line-height:1.7;color:var(--muted);max-height:0;overflow:hidden;transition:max-height .8s var(--ease),opacity .6s;opacity:0}
.step.active p{max-height:120px;opacity:1}
.how-progress{height:2px;background:var(--line);border-radius:2px;margin:26px 18px 0;overflow:hidden}
.how-progress i{display:block;height:100%;background:var(--clay);transform-origin:left;transform:scaleX(0)}
.how-visual{position:relative}
.window.small{box-shadow:0 2px 6px rgba(20,20,19,.05),0 50px 100px -40px rgba(60,40,30,.4)}
.shot-stack{position:relative;aspect-ratio:1600/1022}
.shot-stack img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.04) translateY(10px);transition:opacity .9s var(--ease),transform 1.4s var(--ease)}
.shot-stack img.active{opacity:1;transform:none}

/* ── 精剪演示 ── */
.cut{padding:clamp(120px,18vh,200px) var(--gutter);max-width:1240px;margin:0 auto}
.timeline{margin-top:56px;padding:32px clamp(18px,3vw,36px) 26px;border-radius:22px;background:var(--surface);border:1px solid var(--line);box-shadow:0 30px 80px -40px rgba(60,40,30,.3)}
.tl-captions{position:relative;height:34px;margin-bottom:14px}
.tl-captions span{position:absolute;left:var(--x);top:0;padding:4px 10px;border-radius:8px;background:var(--stage);color:var(--stage-ink);font-size:13px;white-space:nowrap;opacity:0;transform:translateY(8px);transition:opacity .6s var(--ease),transform .8s var(--ease),left 1.2s var(--ease)}
.timeline.done .tl-captions span{opacity:1;transform:none}
.timeline.done .tl-captions span:nth-child(2){transition-delay:.12s}.timeline.done .tl-captions span:nth-child(3){transition-delay:.24s}
.tl-track{display:flex;align-items:center;height:96px;gap:0;border-radius:12px;background:var(--paper);padding:0 6px;overflow:hidden}
.seg{display:flex;align-items:center;gap:2px;height:100%;flex:var(--w) 1 0;min-width:0;overflow:hidden;padding:0 1px;border-radius:8px;position:relative}
.seg i{flex:1 1 0;min-width:1px;max-width:4px;border-radius:2px;background:var(--ink-2);opacity:.8}
.seg.pause i{background:var(--faint);opacity:.6}
.seg.retake i{background:#C2463A;opacity:.75}
.seg.pause,.seg.retake{background:repeating-linear-gradient(135deg,transparent 0 6px,rgba(0,0,0,.03) 6px 12px)}
.seg.retake{background-color:rgba(194,70,58,.07)}
.tl-legend{display:flex;flex-wrap:wrap;gap:18px;align-items:center;margin-top:18px;font-size:13px;color:var(--muted)}
.lg{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:6px}
.lg.speech{background:var(--ink-2)}.lg.pause{background:var(--faint)}.lg.retake{background:#C2463A}
.tl-time{margin-left:auto;color:var(--ink-2)}
.tl-time b{font-family:var(--serif-num);font-size:26px;font-weight:600;color:var(--clay);font-variant-numeric:tabular-nums;margin:0 2px}

/* ── 功能 ── */
.features{padding:clamp(60px,10vh,120px) var(--gutter) clamp(100px,14vh,160px);max-width:1240px;margin:0 auto}
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:56px}
.card{position:relative;padding:22px 24px 26px;border-radius:20px;background:var(--surface);border:1px solid var(--line);transform-style:preserve-3d;will-change:transform}
.card.span-2{grid-column:span 2}
.card.span-3{grid-column:1/-1;display:grid;grid-template-columns:1.2fr 1fr;gap:8px 32px;align-items:center}
.card.span-3 .card-art{grid-row:1/3}
.card.span-3 h3{margin:0 0 6px;align-self:end}
.card.span-3 p{align-self:start}
.card h3{margin:22px 0 6px;font-size:18px;font-weight:600}
.card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.7}
.card-art{height:150px;border-radius:14px;background:var(--paper);position:relative;overflow:hidden;display:grid;place-items:center}
.art-tele{background:var(--stage);color:#7D7B74;font-family:var(--serif);font-size:clamp(17px,1.8vw,24px);line-height:1.6;padding:0 28px;place-items:center start}
.art-tele p{margin:0}.art-tele em{font-style:normal;color:var(--stage-ink)}
.art-tele em:nth-child(2){animation:readOn 3.2s var(--ease-in-out) infinite}
@keyframes readOn{0%,30%{color:#7D7B74}50%,100%{color:var(--stage-ink)}}
.art-broll{display:flex;align-items:center;gap:6px;padding:0 22px}
.art-broll i{height:40px;flex:1;border-radius:8px;background:#D6D3C8}
.art-broll i.b{flex:.8;height:64px;background:linear-gradient(135deg,var(--clay-2),#E8A878);animation:pop 2.8s var(--ease) infinite}
.art-broll i.b:nth-of-type(4){animation-delay:1.4s}
@keyframes pop{0%,100%{transform:translateY(0)}40%{transform:translateY(-8px)}}
.art-brand{background:linear-gradient(160deg,#8A6A55,#2B2622)}
.art-brand img{position:absolute;left:16px;top:16px;width:46px;border-radius:11px;box-shadow:0 6px 16px rgba(0,0,0,.25)}
.art-brand span{position:absolute;bottom:16px;padding:5px 12px;border-radius:20px;background:rgba(255,255,255,.16);color:#fff;font-size:13px}
.art-revise{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}
.bubble{padding:9px 14px;border-radius:14px 14px 14px 4px;background:var(--surface);border:1px solid var(--line);font-size:13.5px;box-shadow:0 8px 20px -12px rgba(0,0,0,.2)}
.art-revise .v{font-family:var(--serif-num);font-size:28px;font-weight:600;color:var(--clay);animation:pop 2.6s var(--ease) infinite}
.art-accounts{display:flex;gap:10px;justify-content:center}
.art-accounts i{width:46px;height:46px;border-radius:13px;background:var(--c);color:#fff;font-style:normal;font-weight:600;display:grid;place-items:center;animation:pop 3s var(--ease) infinite}
.art-accounts i:nth-child(2){animation-delay:.2s}.art-accounts i:nth-child(3){animation-delay:.4s}.art-accounts i:nth-child(4){animation-delay:.6s}
.art-wave{display:flex;align-items:center;gap:3px;padding:0 24px}
.art-wave i{flex:1;max-width:5px;border-radius:3px;background:var(--clay-2);opacity:.75;transform-origin:center;animation:wave 1.8s var(--ease-in-out) infinite;animation-delay:calc(var(--i) * -70ms)}
@keyframes wave{0%,100%{transform:scaleY(.35)}50%{transform:scaleY(1)}}

/* ── 视频类型 ── */
.types{padding:20px 0 clamp(100px,14vh,160px);overflow:hidden}
.marquee{display:flex;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee+.marquee{margin-top:12px}
.marquee-row{display:flex;gap:12px;flex:0 0 auto;padding-right:12px;animation:slide 46s linear infinite}
.marquee.reverse .marquee-row{animation-direction:reverse;animation-duration:52s}
.marquee:hover .marquee-row{animation-play-state:paused}
.marquee span{flex:0 0 auto;padding:14px 26px;border-radius:40px;border:1px solid var(--line-strong);background:var(--surface);font-size:17px;color:var(--ink-2);font-family:var(--serif)}
@keyframes slide{to{transform:translateX(-50%)}}
.stats{display:grid;grid-template-columns:repeat(4,1fr);max-width:1080px;margin:72px auto 0;padding:0 var(--gutter)}
.stats div{padding:6px 20px;border-left:1px solid var(--line)}
.stats div:first-child{border-left:0}
.stats b{display:block;font-family:var(--serif-num);font-weight:500;font-size:clamp(36px,4vw,54px);line-height:1.1;font-variant-numeric:tabular-nums}
.stats span{color:var(--muted);font-size:14px}

/* ── 吉祥物 ── */
.mascot{display:grid;grid-template-columns:auto 1fr;gap:clamp(32px,6vw,90px);align-items:center;max-width:1100px;margin:0 auto;padding:clamp(40px,8vh,100px) var(--gutter) clamp(120px,16vh,180px)}
.mascot-art img{width:clamp(180px,20vw,256px);border-radius:56px;box-shadow:0 40px 80px -30px rgba(150,60,30,.45);animation:float 6s var(--ease-in-out) infinite}
@keyframes float{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-14px) rotate(1.5deg)}}

/* ── 内测 ── */
.join{padding:0 var(--gutter) clamp(80px,12vh,140px)}
.join-card{position:relative;overflow:hidden;max-width:1240px;margin:0 auto;padding:clamp(64px,10vh,120px) clamp(28px,6vw,88px);border-radius:28px;background:var(--stage);color:var(--stage-ink)}
.join-rings{position:absolute;right:-180px;top:-260px;width:720px;height:720px;border-radius:50%;border:1px solid rgba(217,119,87,.35);box-shadow:0 0 0 70px rgba(217,119,87,.045),0 0 0 140px rgba(217,119,87,.03);transition:transform 2s var(--ease)}
.join-card .title,.join-card .sub,.join-actions{position:relative}
.join-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
[data-download][aria-disabled=true]{cursor:default}

/* ── 页脚 ── */
.footer{display:flex;flex-wrap:wrap;align-items:center;gap:20px 32px;padding:34px var(--gutter) 44px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted)}
.footer-brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-family:var(--serif);font-weight:600;font-size:16px}
.footer-brand img{width:26px;border-radius:7px}
.footer-links{display:flex;gap:20px}
.footer-links a:hover,.footer-legal a:hover{color:var(--ink)}
.footer-legal{margin:0 0 0 auto}

/* ── 窄屏 ── */
@media (max-width:900px){
  .card.span-3{display:block}
  .nav-links{display:none}.nav-cta{margin-left:auto}
  .chip-par{display:none}
  .how{height:auto}
  .how-sticky{position:relative;height:auto;grid-template-columns:1fr;padding-top:100px}
  .step{opacity:1}.step p{max-height:none;opacity:1}
  .how-progress{display:none}
  .bento{grid-template-columns:1fr}.card.span-2{grid-column:auto}
  .stats{grid-template-columns:repeat(2,1fr);row-gap:28px}.stats div:nth-child(3){border-left:0}
  .mascot{grid-template-columns:1fr;text-align:center}.mascot-art img{margin:0 auto}
  .footer-legal{margin:0}
}

/* 系统设置了“减少动态效果”：只保留淡入，不做位移和循环动画 */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  [data-reveal],[data-split] .ch>span{opacity:1!important;transform:none!important}
}

/* ── 设备提示 ── */
.device-note{display:flex;align-items:center;gap:12px;max-width:520px;margin:26px auto 0;padding:12px 14px;border-radius:14px;background:rgba(255,255,255,.75);border:1px solid var(--line-strong);text-align:left;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.device-note[hidden]{display:none}
.device-icon{flex:0 0 auto;width:36px;height:36px;border-radius:10px;background:var(--clay-soft);color:var(--clay);display:grid;place-items:center}
.device-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.device-note p{flex:1;margin:0;font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.device-note b{color:var(--ink)}
.device-copy{flex:0 0 auto;height:34px;padding:0 12px;border:0;border-radius:9px;background:var(--ink);color:var(--bg);font:600 13px var(--sans);cursor:pointer}

/* ── 手机：严格禁止左右滑动 ── */
body{overscroll-behavior-x:none;max-width:100%}
.hero,.statement,.how,.cut,.features,.types,.mascot,.join,.footer{overflow-x:clip;max-width:100vw}
@media (max-width:900px){
  body{touch-action:pan-y pinch-zoom}
  .hero-glow{width:100%}
  .device-note{flex-wrap:wrap}
  .device-note p{flex-basis:calc(100% - 48px)}
  .device-copy{margin-left:48px}
}

/* 联系我们 */
.contact-card{position:relative;display:grid;gap:8px;max-width:420px;margin-top:18px;padding:14px 16px;border-radius:14px;background:rgba(240,238,230,.08);border:1px solid rgba(240,238,230,.18);animation:fade-in .25s var(--ease)}
.contact-card[hidden]{display:none}
.contact-card div{display:flex;align-items:center;gap:12px;color:var(--stage-ink);font-size:14.5px}
.contact-card span{width:36px;color:#A8A69D;font-size:13px}
.contact-card b{flex:1;font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums}
.contact-card button,.contact-card a{padding:4px 12px;border:1px solid rgba(240,238,230,.28);border-radius:8px;color:var(--stage-ink);font-size:12.5px;background:none;cursor:pointer}
.contact-card button:hover,.contact-card a:hover{background:rgba(240,238,230,.1)}
@keyframes fade-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.footer-contact{margin:0;color:var(--muted)}
.footer-contact a:hover{color:var(--ink)}

/* ── 下载引导页（download.html） ── */
.dl-page main{max-width:1080px;margin:0 auto;padding:0 var(--gutter)}
.dl-hero{padding:150px 0 70px;text-align:center;display:flex;flex-direction:column;align-items:center}
.dl-hero .sub{margin-left:auto;margin-right:auto;max-width:620px}
.dl-logo{width:96px;height:96px;border-radius:22px;margin-bottom:26px;box-shadow:0 20px 50px -18px rgba(150,70,40,.45);animation:dl-pop 1.1s var(--ease) both}
@keyframes dl-pop{from{opacity:0;transform:translateY(16px) scale(.86)}to{opacity:1;transform:none}}
.dl-in{animation:dl-rise 1s var(--ease) both;animation-delay:calc(var(--d,0s) + .15s)}
@keyframes dl-rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.dl-actions{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:30px}
.dl-meta{font-size:13px;color:var(--muted)}
.dl-warn{margin:18px 0 0;padding:10px 16px;border-radius:12px;background:var(--clay-soft);color:var(--ink-2);font-size:14px}
.dl-warn[hidden]{display:none}
.dl-section{padding:70px 0;border-top:1px solid var(--line)}
.dl-h2{font-size:clamp(28px,3.4vw,42px)}
.dl-why{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:40px}
.dl-why-body p{margin:0 0 16px;color:var(--ink-2);line-height:1.85}
.dl-trust{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:10px}
.dl-trust li{position:relative;padding:12px 14px 12px 40px;border-radius:12px;background:var(--surface);border:1px solid var(--line);font-size:14.5px;color:var(--ink-2)}
.dl-trust li::before{content:"";position:absolute;left:15px;top:50%;width:12px;height:7px;border-left:2px solid var(--clay);border-bottom:2px solid var(--clay);transform:translateY(-70%) rotate(-45deg)}
.dl-steps{list-style:none;padding:0;margin:40px 0 0;display:grid;gap:28px}
.dl-step,.dl-why,.dl-done{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform 1.1s var(--ease)}
.dl-step.in,.dl-why.in,.dl-done.in{opacity:1;transform:none}
.dl-step{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center;padding:34px;border-radius:24px;background:var(--surface);border:1px solid var(--line)}
.dl-step-copy h3{font-family:var(--serif);font-weight:500;font-size:24px;margin:14px 0 12px}
.dl-step-copy p{margin:0 0 12px;color:var(--ink-2);line-height:1.8}
.dl-step-copy code,.dl-code code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88em;background:var(--paper);padding:2px 6px;border-radius:6px;word-break:break-all}
.dl-num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--clay);color:#fff;font-family:var(--serif-num);font-weight:600}
.dl-tip{font-size:13.5px;color:var(--muted)!important}
.dl-art{display:grid;place-items:center;min-height:240px;padding:20px;border-radius:18px;background:var(--paper)}

/* 示意图：仿 macOS 窗口 */
.mac-win{width:100%;max-width:400px;border-radius:12px;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.05),0 22px 50px -20px rgba(40,30,20,.35);overflow:hidden;font-size:12px;color:#222}
.mac-bar{display:flex;align-items:center;gap:6px;height:30px;padding:0 12px;background:#f2f1ee;border-bottom:1px solid #e3e1da}
.mac-bar i{width:10px;height:10px;border-radius:50%;background:#ff5f57}.mac-bar i:nth-child(2){background:#febc2e}.mac-bar i:nth-child(3){background:#28c840}
.mac-bar span{flex:1;text-align:center;margin-right:42px;color:#666;font-weight:600}
.mac-dmg{position:relative;display:flex;align-items:center;justify-content:space-around;padding:34px 18px 30px}
.mac-file{display:flex;flex-direction:column;align-items:center;gap:8px}
.mac-file img,.mac-folder{width:62px;height:62px;border-radius:14px}
.mac-folder{display:grid;place-items:center;background:linear-gradient(#7cc4f7,#3d9ae8);border-radius:10px}
.mac-folder svg{width:30px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.mac-drag svg{width:90px;fill:none;stroke:var(--clay);stroke-width:2;stroke-dasharray:5 5;stroke-linecap:round;animation:dl-dash 1.2s linear infinite}
@keyframes dl-dash{to{stroke-dashoffset:-20}}
.mac-ghost{position:absolute;left:0;top:0;width:62px;height:62px;border-radius:14px;opacity:0;animation:dl-drag 3.2s var(--ease-in-out) infinite}
@keyframes dl-drag{0%,12%{opacity:0;transform:none}20%{opacity:.85;transform:translateY(-4px) scale(1.04)}70%{opacity:.85;transform:translate(calc(var(--dx,170px)),-4px) scale(1.04)}82%,100%{opacity:0;transform:translate(calc(var(--dx,170px)),0) scale(.8)}}
.mac-alert{position:relative;width:260px;padding:22px 18px 16px;border-radius:14px;background:#f6f5f2;text-align:center;box-shadow:0 22px 50px -20px rgba(40,30,20,.4);font-size:12px;color:#222}
.mac-alert img{width:52px;height:52px;border-radius:12px;margin:0 auto 10px}
.mac-alert b{display:block;font-size:13px;margin-bottom:6px}
.mac-alert p{margin:0 0 14px;color:#555;line-height:1.5}
.mac-alert-btns{display:grid;gap:6px}
.mac-alert-btns span{padding:6px;border-radius:7px;background:#e6e4df;font-weight:600}
.mac-alert-btns .hl{background:#0a7cff;color:#fff;box-shadow:0 0 0 3px rgba(201,100,66,.0);animation:dl-ring 2s var(--ease) infinite}
.mac-alert-btns .dim{color:#999}
@keyframes dl-ring{0%,100%{box-shadow:0 0 0 0 rgba(201,100,66,.55)}60%{box-shadow:0 0 0 7px rgba(201,100,66,0)}}
.mac-callout{position:absolute;right:-14px;bottom:62px;padding:4px 10px;border-radius:999px;background:var(--clay);color:#fff;font-style:normal;font-size:12px;font-weight:600;transform:rotate(4deg)}
.mac-set-body{display:grid;grid-template-columns:110px 1fr;min-height:190px}
.mac-set-body aside{display:grid;align-content:start;gap:2px;padding:10px 6px;background:#f2f1ee;border-right:1px solid #e3e1da}
.mac-set-body aside span{padding:4px 6px;border-radius:5px;color:#555;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mac-set-body aside .on{background:#0a7cff;color:#fff}
.mac-set-main{position:relative;padding:12px}
.mac-set-main small{display:block;margin-bottom:6px;color:#888;font-weight:600}
.mac-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:8px;background:#f7f6f3;margin-bottom:6px;line-height:1.45}
.mac-row em{font-style:normal;color:#888;white-space:nowrap}
.mac-row-hl{background:#fff;box-shadow:0 0 0 2px var(--clay)}
.mac-btn{flex:none;padding:4px 10px;border-radius:6px;background:#e6e4df;font-weight:600;animation:dl-ring 2s var(--ease) infinite}
.mac-set-main{padding-bottom:40px}.mac-set-main .mac-callout{right:12px;bottom:10px}
.dl-done{display:flex;align-items:center;gap:20px;margin-top:28px;padding:26px 30px;border-radius:22px;background:var(--stage);color:var(--stage-ink)}
.dl-done img{width:64px;height:64px;border-radius:16px;flex:none}
.dl-done h3{font-family:var(--serif);font-weight:500;font-size:22px;margin:0 0 6px}
.dl-done p{margin:0;color:#A8A69D}
.dl-faq{display:grid;gap:10px;margin-top:30px}
.dl-faq details{border-radius:14px;background:var(--surface);border:1px solid var(--line);padding:0 20px;transition:background .3s}
.dl-faq summary{cursor:pointer;list-style:none;padding:18px 28px 18px 0;font-weight:600;position:relative}
.dl-faq summary::-webkit-details-marker{display:none}
.dl-faq summary::after{content:"";position:absolute;right:4px;top:50%;width:8px;height:8px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:translateY(-70%) rotate(45deg);transition:transform .4s var(--ease)}
.dl-faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.dl-faq details p{margin:0 0 14px;color:var(--ink-2);line-height:1.8}
.dl-code{display:flex;align-items:center;gap:10px;margin:0 0 12px;padding:10px 12px;border-radius:10px;background:var(--stage)}
.dl-code code{flex:1;background:none;color:var(--stage-ink);padding:0}
.dl-code button,.dl-contact-list button{border:0;border-radius:8px;padding:6px 12px;background:var(--clay);color:#fff;font:inherit;font-size:13px;font-weight:600;cursor:pointer}
.dl-contact-list{display:grid;gap:10px;max-width:460px;margin-top:24px}
.dl-contact-list div{display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:14px;background:var(--surface);border:1px solid var(--line)}
.dl-contact-list span{width:36px;color:var(--muted);font-size:13px}
.dl-contact-list b{flex:1;font-weight:600}
.dl-contact-list a{color:var(--clay);font-weight:600;font-size:14px}
@media (max-width:820px){
  .dl-hero{padding:120px 0 50px}
  .dl-why,.dl-step{grid-template-columns:minmax(0,1fr);gap:22px}
  .dl-step{padding:22px}
  .dl-done{flex-direction:column;align-items:flex-start}
  .dl-page .nav-links{display:none}
}
@media (prefers-reduced-motion:reduce){.dl-in,.dl-logo,.mac-ghost,.mac-drag svg,.mac-btn,.mac-alert-btns .hl{animation:none}.dl-step,.dl-why,.dl-done{opacity:1;transform:none}}
/* 引导页重点：像荧光笔一样从左到右划过 */
.dl-mark{color:var(--ink);font-weight:600;padding:0 3px;border-radius:3px;-webkit-box-decoration-break:clone;box-decoration-break:clone;background:linear-gradient(transparent 40%,rgba(201,100,66,.4) 40%,rgba(201,100,66,.4) 94%,transparent 94%) no-repeat 0 0/0% 100%;animation:dl-mark 1.1s var(--ease) 1.1s forwards}
@keyframes dl-mark{to{background-size:100% 100%}}
@media (prefers-reduced-motion:reduce){.dl-mark{animation:none;background-size:100% 100%}}
/* 引导页：单独一段大字提醒 */
.dl-alert{margin:22px 0 0;font-family:var(--serif);font-weight:500;font-size:clamp(26px,3.6vw,40px);line-height:1.3;letter-spacing:-.005em}
.dl-alert .dl-mark{font-weight:inherit;padding:0 6px}
.dl-alert-sub{margin-top:12px!important;font-size:15px!important}

/* Windows 引导页：仿 SmartScreen 蓝色窗口、安装向导 */
.win-smart{position:relative;width:300px;padding:22px 22px 16px;background:#0f5fae;color:#fff;font-size:12px;line-height:1.55;box-shadow:0 22px 50px -20px rgba(10,40,90,.6)}
.win-smart b{display:block;font-size:17px;font-weight:600;margin-bottom:10px}
.win-smart p{margin:0 0 8px;color:#dce9f7}
.win-smart .win-info{color:#fff}
.win-more{display:inline-block;color:#fff;font-weight:600;margin-bottom:14px;animation:dl-ring 2s var(--ease) infinite;border-radius:4px;padding:0 3px}
.win-btns{display:flex;justify-content:flex-end;gap:8px;margin-top:6px}
.win-btns span{padding:6px 14px;border:1px solid rgba(255,255,255,.6);font-weight:600}
.win-btns .hl{background:#fff;color:#0f5fae;animation:dl-ring 2s var(--ease) infinite}
.win-btns .dim{opacity:.7}
.win-smart .mac-callout{right:-12px;bottom:52px}
.win-installer{max-width:340px;border-radius:6px}
.win-bar{display:flex;align-items:center;gap:14px;height:30px;padding:0 0 0 12px;background:#fff;border-bottom:1px solid #e5e5e5;font-size:12px;color:#333}
.win-bar span{flex:1}.win-bar i{font-style:normal;width:36px;text-align:center;color:#666}
.win-body{display:flex;gap:14px;align-items:center;padding:22px 18px}
.win-body img{width:48px;height:48px;border-radius:10px}
.win-body b{display:block;font-size:13px;margin-bottom:8px}
.win-body small{color:#888;font-size:11px}
.win-progress{width:200px;height:6px;background:#e6e6e6;border-radius:3px;overflow:hidden;margin-bottom:6px}
.win-progress i{display:block;height:100%;width:40%;background:#0f6cbd;animation:win-prog 2.4s var(--ease-in-out) infinite}
@keyframes win-prog{from{width:5%}to{width:95%}}
.win-foot{display:flex;justify-content:flex-end;gap:8px;padding:10px 14px;background:#f3f3f3;border-top:1px solid #e5e5e5;font-size:12px}
.win-foot span{padding:5px 16px;border:1px solid #ccc;background:#fff}
.win-foot .hl{background:#0f6cbd;color:#fff;border-color:#0f6cbd}
.win-foot .dim{color:#999}
.win-smart .mac-callout.win-callout-more{right:auto;left:96px;bottom:auto;top:108px}
.join-actions [hidden]{display:none}

/* 下载页右上角：教用户在 Chrome / Edge 里点「保留」 */
.keep-tip{position:fixed;top:14px;right:18px;z-index:200;width:300px;padding:14px 34px 14px 16px;background:var(--surface);border:1px solid var(--line-strong);border-radius:14px;box-shadow:0 12px 32px -10px rgba(20,20,19,.28);font-size:13.5px;line-height:1.6;color:var(--ink-2);animation:keepIn .5s .8s both}
.keep-tip b{display:block;color:var(--ink);font-size:14px;margin-bottom:4px}
.keep-tip em{font-style:normal;color:var(--clay);font-weight:600}
.keep-tip svg{vertical-align:-2px;color:var(--clay)}
.keep-arrow{position:absolute;top:-7px;right:44px;width:12px;height:12px;background:var(--surface);border-left:1px solid var(--line-strong);border-top:1px solid var(--line-strong);transform:rotate(45deg)}
.keep-x{position:absolute;top:6px;right:8px;border:0;background:none;font-size:18px;line-height:1;color:var(--faint);cursor:pointer;padding:4px}
.keep-x:hover{color:var(--ink)}
@keyframes keepIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@media (max-width:640px){.keep-tip{left:16px;right:16px;width:auto}}

/* ── 内测下载：三张带系统图标的卡片 ── */
.pf-grid{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:36px}
.pf-card{display:flex;flex-direction:column;align-items:flex-start;gap:14px;padding:22px;border-radius:16px;border:1px solid rgba(240,238,230,.16);background:rgba(240,238,230,.04);color:var(--stage-ink);transition:background .25s,border-color .25s,transform .4s var(--ease)}
.pf-card:hover{background:rgba(240,238,230,.09);border-color:rgba(240,238,230,.3);transform:translateY(-2px)}
.pf-logo{flex:none;display:grid;place-items:center;width:46px;height:46px;border-radius:12px;background:rgba(240,238,230,.1)}
.pf-logo svg{width:24px;height:24px}
.pf-text{min-width:0;display:grid;gap:4px}
.pf-text b{font-size:16px;font-weight:600}
.pf-text small{font-size:12.5px;line-height:1.45;color:rgba(240,238,230,.62)}
.pf-go{flex:none;align-self:stretch;margin-top:auto;display:flex;align-items:center;justify-content:center;gap:6px;height:40px;padding:0 12px;border-radius:10px;background:rgba(240,238,230,.1);font-size:13px;font-weight:600;white-space:nowrap}
.pf-arrow{width:16px;height:16px}
.pf-card.is-primary{background:var(--stage-ink);color:var(--ink);border-color:transparent}
.pf-card.is-primary .pf-logo{background:var(--clay);color:#fff}
.pf-card.is-primary .pf-text small{color:var(--muted)}
.pf-card.is-primary .pf-go{background:var(--clay);color:#fff}
.pf-grid [hidden]{display:none}
.join-actions{margin-top:18px}
@media (max-width:900px){.pf-grid{grid-template-columns:1fr}.pf-card{flex-direction:row;align-items:center;padding:16px}.pf-text{flex:1}.pf-go{align-self:auto;margin-top:0;height:34px}}

/* 首页最顶上的推盘助手横条 */
.topbar{display:flex;align-items:center;justify-content:center;gap:10px;height:38px;padding:0 var(--gutter);background:var(--stage);color:var(--stage-ink);font-size:13px;white-space:nowrap;overflow:hidden}
.topbar span:first-of-type{overflow:hidden;text-overflow:ellipsis}
.topbar-tag{flex:none;padding:1px 8px;border-radius:10px;background:var(--clay);color:#fff;font-size:12px}
.topbar .arrow{flex:none;transition:transform .5s var(--ease)}
.topbar:hover .arrow{transform:translateX(4px)}
.has-topbar .nav{top:38px;transition:top .4s var(--ease),transform .6s var(--ease),background .4s,box-shadow .4s,backdrop-filter .4s}
.has-topbar .nav.scrolled{top:0}