/* 界面只用纸和墨两种颜色，颜色留给贴纸本身。深色跟随系统；例子区的 On paper / On ink 可以单独把那一段换成浅色或深色，
   用来证明贴纸外圈是真透明。--white 是印刷品（logo 标签、原 logo 底块）的纸白，深色下也不变。 */
:root,.scheme-light{
  color-scheme:light;
  --paper:#F6F5F1;--ink:#1D201D;--muted:#686C64;--faint:#9A9D95;--line:#E2E1DA;--chip:#EBEAE4;--chip-hover:#E1E0D9;--surface:#FFFFFF;
  --liner:#E9E7E0;--liner-grid:rgba(29,32,29,.045);--liner-edge:rgba(29,32,29,.05);
  --rest:drop-shadow(0 1px 1px rgba(29,32,29,.10)) drop-shadow(0 8px 14px rgba(29,32,29,.07));
  --lifted:drop-shadow(0 4px 4px rgba(29,32,29,.08)) drop-shadow(0 22px 26px rgba(29,32,29,.16));
}
:root{
  --white:#FFFFFF;
  --sans:"SF Pro Display",-apple-system,BlinkMacSystemFont,"Helvetica Neue","Segoe UI",Arial,"PingFang SC",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root{
    color-scheme:dark;
    --paper:#1B1D1B;--ink:#F0EFEA;--muted:#A9ABA3;--faint:#7C8078;--line:#323632;--chip:#2A2D2A;--chip-hover:#343834;--surface:#242724;
  --liner:#262926;--liner-grid:rgba(255,255,255,.04);--liner-edge:rgba(255,255,255,.05);
  --rest:drop-shadow(0 1px 1px rgba(0,0,0,.35)) drop-shadow(0 8px 14px rgba(0,0,0,.30));
  --lifted:drop-shadow(0 4px 4px rgba(0,0,0,.3)) drop-shadow(0 22px 26px rgba(0,0,0,.45));
  }
}
.scheme-dark{
  color-scheme:dark;
  --paper:#1B1D1B;--ink:#F0EFEA;--muted:#A9ABA3;--faint:#7C8078;--line:#323632;--chip:#2A2D2A;--chip-hover:#343834;--surface:#242724;
  --liner:#262926;--liner-grid:rgba(255,255,255,.04);--liner-edge:rgba(255,255,255,.05);
  --rest:drop-shadow(0 1px 1px rgba(0,0,0,.35)) drop-shadow(0 8px 14px rgba(0,0,0,.30));
  --lifted:drop-shadow(0 4px 4px rgba(0,0,0,.3)) drop-shadow(0 22px 26px rgba(0,0,0,.45));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px;-webkit-text-size-adjust:100%}
html,body{overflow-x:clip}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
h1,h2,h3,p,figure,ol{margin:0}
ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}
img{display:block;max-width:100%}
svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
code{font-family:var(--mono)}
[hidden]{display:none!important}
:focus-visible{outline:2px solid currentColor;outline-offset:4px;border-radius:6px}
.wrap{width:min(1200px,calc(100% - 96px));margin-inline:auto}
.skip{position:fixed;left:12px;top:-60px;z-index:30;background:var(--ink);color:var(--paper);padding:8px 14px;border-radius:8px}
.skip:focus{top:12px}
.nw{white-space:nowrap}

.btn-sm{display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:9px;background:var(--ink);color:var(--paper);font-size:14px;font-weight:500}
.btn-sm:hover{opacity:.86}
.text-link,.toolbar-links a{display:inline-flex;align-items:center;gap:5px;font-size:15px;font-weight:500;text-decoration:underline;text-decoration-color:var(--line);text-decoration-thickness:1.5px;text-underline-offset:5px;transition:text-decoration-color .15s}
.text-link:hover,.toolbar-links a:hover{text-decoration-color:currentColor}
.text-link svg,.toolbar-links svg{width:14px;height:14px}

/* 顶栏 */
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.wordmark{display:inline-flex;align-items:center;gap:3px;font-size:21px;font-weight:650;letter-spacing:-.04em}
.wordmark svg{width:19px;height:19px;stroke-width:2.2;margin-top:1px}
.nav nav{display:flex;align-items:center;gap:30px;font-size:15px}
.nav-link{color:var(--muted)}
.nav-link:hover{color:var(--ink)}

/* ── 首屏：三张印着原 logo 的方形标签，揭开就是它变成的角色 ── */
.hero{width:min(1200px,calc(100% - 48px));margin:auto;padding:28px 0 72px;text-align:center}
.hero h1{font-size:clamp(50px,6.6vw,92px);line-height:.98;font-weight:600;letter-spacing:-.048em}
.lede{margin:22px auto 0;max-width:31em;font-size:18px;line-height:1.6;color:var(--muted);text-wrap:balance}
.pad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;max-width:960px;margin:44px auto 0}
.slot{--size:min(210px,24vw);position:relative;display:flex;flex-direction:column;align-items:center}
.slot-name{display:flex;align-items:baseline;gap:8px;margin-top:22px;font-size:14px}
.slot-name span{font:12px var(--mono);color:var(--faint)}

/* 揭的程度是 --d：从右下角沿 45° 折起的长度。翻起来的那一角是标签背面。 */
@property --d{syntax:'<length>';inherits:true;initial-value:0px}
.label{--d:22px;position:relative;width:var(--size);height:var(--size);padding:0;border:0;background:none;transform:rotate(var(--t));transition:--d .35s cubic-bezier(.3,.7,.3,1),transform .5s cubic-bezier(.3,.7,.3,1),opacity .45s;touch-action:none;z-index:2}
.label:hover{--d:40px}
.label.dragging{transition:transform .5s,opacity .45s}
.face{position:absolute;inset:0;display:grid;place-items:center;border-radius:20px;background:var(--white);box-shadow:inset 0 0 0 1px rgba(29,32,29,.06);clip-path:polygon(0 0,100% 0,100% calc(100% - var(--d)),calc(100% - var(--d)) 100%,0 100%);filter:drop-shadow(0 1px 1px rgba(29,32,29,.08))}
.face img{width:58%;height:58%;object-fit:contain;mix-blend-mode:multiply;pointer-events:none}
/* MultiPush 的 logo 文件自带一圈浅灰底和阴影，按黑色圆角方块的实际边界裁掉 */
.face img[src$="logo-multipush.png"],.mark img[src$="logo-multipush.png"]{clip-path:inset(7% 9% 9% 6% round 24%)}
.flap-wrap{position:absolute;inset:0;filter:drop-shadow(-3px -3px 4px rgba(29,32,29,.16));pointer-events:none}
.flap{position:absolute;inset:0;clip-path:polygon(100% calc(100% - var(--d)),calc(100% - var(--d)) 100%,calc(100% - var(--d)) calc(100% - var(--d)));background:linear-gradient(to top left,#D6D4CC 0%,#F4F3EF 18%,#FFFFFF 45%,#EDEBE5 100%)}
.label.gone{transform:translate(180px,-260px) rotate(48deg) scale(.9);opacity:0;pointer-events:none;transition:transform .5s cubic-bezier(.3,.7,.3,1),opacity .2s ease-out}
.slot::after{content:'';position:absolute;top:0;left:50%;width:var(--size);aspect-ratio:1;transform:translateX(-50%) rotate(var(--t));border-radius:20px;box-shadow:0 18px 30px -22px rgba(29,32,29,.45);z-index:1;pointer-events:none;transition:opacity .3s}
.slot.revealed::after{opacity:0}

/* 标签底下的角色：先缩在标签里，揭角时能瞄到颜色；揭开后蹦出来，比标签大一圈 */
.char{position:absolute;top:0;left:50%;width:var(--size);aspect-ratio:1;transform:translateX(-50%) rotate(var(--ct)) scale(.86);z-index:1;transition:transform .6s cubic-bezier(.34,1.56,.64,1)}
.char img{width:100%;height:100%;object-fit:contain;filter:var(--rest);pointer-events:none}
.slot.revealed .char{transform:translateX(-50%) translate(var(--dx,0px),var(--dy,0px)) rotate(var(--ct)) scale(1.32);z-index:3;cursor:grab}
.slot.revealed .char:hover img{filter:var(--lifted)}
.char.dragging{cursor:grabbing;transition:none;z-index:9}
.char.dragging img{filter:var(--lifted)}
.pad-status{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;min-height:24px;margin-top:22px;font:12.5px var(--mono);color:var(--faint)}
.restick{border:0;background:none;padding:0;font:inherit;color:var(--ink);text-decoration:underline;text-underline-offset:4px}

.hero-foot{display:flex;flex-direction:column;align-items:center;margin-top:30px}
.command{display:flex;align-items:center;gap:10px;max-width:100%;width:fit-content;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);border-radius:11px;padding:6px 6px 6px 16px;text-align:left}
.command code{font-size:14.5px;min-width:0}
.copy{flex:none;height:32px;padding:0 12px;border:0;border-radius:7px;background:var(--chip);font-size:13px;font-weight:500;color:var(--ink)}
.copy:hover{background:var(--chip-hover)}
.hero-links{display:flex;gap:12px;justify-content:center;margin-top:18px;font-size:15px;color:var(--faint)}
.hero-links a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--line);text-decoration-thickness:1.5px;text-underline-offset:5px}
.hero-links a:hover{text-decoration-color:currentColor}

/* ── 例子：每个品牌一张贴纸底纸 ── */
.examples{padding:80px 0 96px;transition:background-color .45s,color .45s}
.examples{background:var(--paper);color:var(--ink)}
.section-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:end}
.section-head h2,.method h2,.install h2{font-size:clamp(34px,3.8vw,48px);line-height:1.08;font-weight:600;letter-spacing:-.04em;text-wrap:balance}
.section-head p{font-size:17px;line-height:1.7;color:var(--muted);max-width:34em}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:44px 0 0}
.surface{display:flex;padding:3px;border-radius:10px;box-shadow:inset 0 0 0 1px var(--line)}
.surface button{border:0;background:none;padding:5px 13px;border-radius:7px;font-size:13.5px;color:var(--muted)}
.surface button[aria-pressed=true]{background:var(--ink);color:var(--paper)}
.toolbar-links{display:flex;gap:22px}

.set{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:56px;align-items:center;margin-top:64px}
.set:nth-child(even) .sheet{order:2}
.sheet{position:relative;aspect-ratio:4/3;border-radius:18px;background-color:var(--liner);background-image:linear-gradient(var(--liner-grid) 1px,transparent 1px),linear-gradient(90deg,var(--liner-grid) 1px,transparent 1px);background-size:28px 28px;background-position:-1px -1px;box-shadow:inset 0 0 0 1px var(--liner-edge);transition:background-color .45s}
.peel{position:absolute;padding:0;border:0;background:none;aspect-ratio:1;cursor:zoom-in;transform:rotate(var(--r));transition:transform .35s cubic-bezier(.2,.8,.2,1)}
.peel img{width:100%;height:100%;object-fit:contain;filter:var(--rest);transition:filter .35s}
.peel:hover,.peel.hot{transform:rotate(calc(var(--r) * -.5)) translateY(-8px) scale(1.04);z-index:3}
.peel:hover img,.peel.hot img{filter:var(--lifted)}
.p0{width:36%;left:2%;top:3%;--r:-6deg}
.p1{width:31%;left:37%;top:0;--r:4deg}
.p2{width:30%;left:68%;top:8%;--r:-3deg}
.p3{width:33%;left:14%;top:49%;--r:5deg}
.p4{width:33%;left:47%;top:45%;--r:-4deg}
.mark{position:absolute;left:81%;top:63%;width:15%;display:flex;flex-direction:column;align-items:center;gap:6px;transform:rotate(3deg)}
.mark span{display:grid;place-items:center;width:100%;aspect-ratio:1;border-radius:16%;background:var(--white);box-shadow:0 1px 2px rgba(29,32,29,.12)}
.mark img{width:66%;height:66%;object-fit:contain;mix-blend-mode:multiply}
.mark small{font:10.5px var(--mono);color:var(--faint);white-space:nowrap}
/* 滚到时一张张贴上去 */
.js .peel,.js .mark{opacity:0}
.sheet.in .peel,.sheet.in .mark{opacity:1;animation:slap .5s cubic-bezier(.3,1.4,.5,1) backwards;animation-delay:calc(var(--i) * 110ms)}
@keyframes slap{0%{opacity:0;transform:rotate(calc(var(--r,3deg) * -2)) translateY(-24px) scale(1.35)}60%{opacity:1}100%{opacity:1;transform:rotate(var(--r,3deg))}}

.set-info h3{font-size:30px;font-weight:600;letter-spacing:-.03em;line-height:1.15}
.route{display:block;margin-top:6px;font:12.5px var(--mono);color:var(--faint)}
.set-info>p{margin-top:16px;font-size:16px;line-height:1.7;color:var(--muted)}
.stories{margin-top:22px;border-top:1px solid var(--line)}
.stories button{display:grid;grid-template-columns:34px minmax(0,1fr);width:100%;padding:10px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;font-size:15px;color:inherit;cursor:zoom-in}
.stories button span:first-child{font:12px/1.9 var(--mono);color:var(--faint)}
.stories button:hover span:last-child,.stories button.hot span:last-child{text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:4px}
.error{margin-top:32px;padding:20px;border-radius:12px;box-shadow:inset 0 0 0 1px var(--line)}
.error a{text-decoration:underline}

/* 方法 */
.method{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;padding:120px 0 0}
.method-head{position:sticky;top:40px;align-self:start}
.method-head p{margin-top:20px;font-size:17px;line-height:1.7;color:var(--muted);max-width:30em}
.method-head .plot{display:flex;flex-direction:column;align-items:flex-start;gap:4px;margin-top:22px;color:var(--ink);font:13.5px/1.5 var(--mono)}
.plot span{background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);border-radius:7px;padding:6px 11px}
.plot i{font-style:normal;color:var(--faint);padding-left:14px;transform:rotate(90deg);transform-origin:18px 50%;line-height:1;height:14px}
.decisions li{display:grid;grid-template-columns:44px minmax(0,1fr);column-gap:8px;padding:18px 0 20px;border-top:1px solid var(--line)}
.decisions .n{grid-row:span 2;font:12.5px/1.9 var(--mono);color:var(--faint)}
.decisions h3{font-size:17px;font-weight:600;letter-spacing:-.01em}
.decisions p{margin-top:4px;font-size:15.5px;line-height:1.65;color:var(--muted)}
.method>.text-link{grid-column:2;margin-top:8px;justify-self:start}

/* 安装 */
.install{margin-top:120px;padding-top:72px;border-top:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:44px;margin-top:40px}
.steps li{min-width:0}
.steps h3{display:flex;align-items:baseline;gap:12px;font-size:18px;font-weight:600;letter-spacing:-.015em}
.steps h3 span{font:12.5px var(--mono);color:var(--faint)}
.steps p{margin-top:10px;font-size:15.5px;line-height:1.7;color:var(--muted)}
.steps .command{width:100%;margin-top:14px}
.steps .prompt{align-items:flex-start;padding:12px 6px 12px 16px}
.steps .prompt code{font:14px/1.65 var(--sans);color:var(--ink)}
.steps p.small{font-size:14px}
.small code,.compat code{white-space:nowrap;font-size:.92em;background:var(--chip);padding:1px 5px;border-radius:4px}
.small a{text-decoration:underline;text-underline-offset:3px}
.steps .text-link{margin-top:14px}
.compat{margin-top:44px;max-width:52em;font-size:14px;line-height:1.7;color:var(--faint)}
.status{min-height:20px;margin-top:8px;font-size:13px;color:var(--muted)}

/* 页脚 */
.foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px 32px;margin-top:120px;padding:40px 0 56px;border-top:1px solid var(--line)}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 26px;font-size:14.5px;color:var(--muted)}
.foot nav a:hover{color:var(--ink)}
.foot p{width:100%;font-size:13px;color:var(--faint)}

/* 大图：铺满一屏的实色纸面，不是浮在页面上的卡片 */
.viewer{width:100vw;height:100dvh;max-width:none;max-height:none;margin:0;padding:0;border:0;background:var(--paper);color:var(--ink)}

.viewer::backdrop{background:transparent}
.v-inner{position:relative;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:center;gap:56px;height:100%;padding:56px 72px;max-width:1280px;margin:auto}
.v-stage{display:grid;place-items:center;min-height:0}
.v-stage img{width:min(66vh,100%);height:auto;aspect-ratio:1;object-fit:contain;filter:var(--rest)}
.v-stage.original img{width:min(30vh,50%);padding:5%;border-radius:22%;background:var(--white);filter:none;box-shadow:0 0 0 1px var(--line)}
.viewer[open] .v-stage img{animation:pop .4s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:.4;transform:scale(.96) rotate(-2deg)}to{opacity:1;transform:none}}
.v-info{max-width:400px}
.v-meta{display:flex;gap:14px;font:12.5px var(--mono);color:var(--faint)}
.v-info h2{margin-top:14px;font-size:34px;line-height:1.15;font-weight:600;letter-spacing:-.03em;text-wrap:balance}
.v-info>p:not(.v-meta){margin-top:14px;font-size:17px;line-height:1.65;color:var(--muted)}
.v-compare{display:flex;align-items:center;gap:12px;margin-top:28px;padding:6px 14px 6px 6px;border:0;border-radius:12px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);font-size:14px;font-weight:500;color:var(--ink)}
.v-compare img{width:40px;height:40px;padding:4px;object-fit:contain;border-radius:8px;background:var(--white)}
.v-compare[aria-pressed=true]{background:var(--ink);color:var(--paper);box-shadow:none}
.v-nav{display:flex;gap:8px;margin-top:28px}
.v-nav button,.v-close{display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:50%;background:none;box-shadow:inset 0 0 0 1px var(--line);color:inherit}
.v-nav button:hover,.v-close:hover{background:var(--chip)}
.v-nav svg,.v-close svg{width:20px;height:20px}
.v-close{position:absolute;top:24px;right:24px}

@media (max-width:1100px){
  .wrap{width:calc(100% - 64px)}
  .set{gap:40px}
}
@media (max-width:860px){
  .wrap{width:calc(100% - 48px)}
  .nav{height:66px}
  .nav .nav-link:not([href^=http]){display:none}
  .nav nav{gap:18px}
  .hero{padding:16px 0 56px}
  .lede{font-size:16.5px}
  .pad{gap:6px;margin-top:36px}
  .slot{--size:26vw}
  .label:hover{--d:22px}
  .face{border-radius:14px}
  .slot.revealed .char{transform:translateX(-50%) translate(var(--dx,0px),var(--dy,0px)) rotate(var(--ct)) scale(1.22)}
  .slot-name{flex-direction:column;align-items:center;gap:0;margin-top:20px;font-size:13px}
  .slot-name span{font-size:10.5px}
  .examples{padding:56px 0 64px}
  .section-head{grid-template-columns:1fr;gap:18px}
  .section-head p{font-size:16px}
  .toolbar{flex-direction:column;align-items:flex-start;margin-top:28px}
  .set{grid-template-columns:1fr;gap:24px;margin-top:48px}
  .set:nth-child(even) .sheet{order:0}
  .set-info h3{font-size:26px}
  .method{grid-template-columns:1fr;gap:32px;padding-top:88px}
  .method-head{position:static}
  .method>.text-link{grid-column:1}
  .install{margin-top:88px;padding-top:56px}
  .steps{grid-template-columns:1fr;gap:32px;max-width:560px}
  .foot{margin-top:88px}
  .v-inner{grid-template-columns:1fr;align-content:center;gap:20px;padding:64px 24px 28px}
  .v-stage img{width:min(84vw,48vh)}
  .v-info h2{font-size:26px;margin-top:10px}
  .v-info>p:not(.v-meta){font-size:15.5px;margin-top:8px}
  .v-compare,.v-nav{margin-top:18px}
  .v-close{top:14px;right:14px}
}
@media (max-width:400px){
  .command code{font-size:13px}
  .hero-links{flex-wrap:wrap;gap:4px 10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .js .peel,.js .mark{opacity:1}
}