/* ================================================================
   FERNSTEAD · Catio CW01 — Experience Page
   手法取自 Apple/HiMax 式滚动叙事；调性锁定 Fernstead 后花园温暖系
   ================================================================ */
:root{
  --cream:#FDFBF6;  --paper:#FFFFFF;
  --fern-deep:#1F4433; --fern:#35704F; --meadow:#7FB069; --mint:#EAF3EA;
  --bloom:#E8836F; --petal:#F6DDD6; --sky:#DCEBF5; --lav:#E4DCF2;
  --ink:#1A231E; --muted:#5D6B62; --line:#E7E1D6;
  --serif:"Fraunces",ui-serif,Georgia,serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.xp{
  margin:0;background:var(--cream);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit}
.xp-wrap{max-width:1240px;margin-inline:auto;padding-inline:clamp(20px,5vw,60px)}

/* ---------- 顶部极简 chrome ---------- */
.xp-nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;gap:1rem;
  padding:1.1rem clamp(20px,5vw,60px);
  color:#fff;mix-blend-mode:difference;
  transition:opacity .4s;
}
.xp-nav .navmark{width:26px;height:26px;flex:none;margin-right:.5rem}
.xp-nav .brand{font-family:var(--serif);font-size:1.05rem;letter-spacing:.09em;text-transform:lowercase}
.xp-nav .model{margin-left:auto;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;opacity:.85}

/* ---------- HERO ---------- */
.hero-xp{position:relative;height:100svh;min-height:560px;overflow:hidden}
.hero-xp img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transform:scale(1.08);will-change:transform;
}
.hero-xp::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,35,26,.34) 0%,rgba(20,35,26,0) 34%,rgba(20,35,26,.06) 60%,rgba(20,35,26,.52) 100%);
}
.hero-copy{
  position:absolute;left:0;right:0;bottom:clamp(3rem,8vh,6.5rem);z-index:3;
  padding-inline:clamp(20px,5vw,60px);max-width:1240px;margin-inline:auto;
}
.hero-copy .kicker{
  font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;
  color:#DCEBDD;margin:0 0 1rem;opacity:0;animation:rise .9s .25s forwards;
}
.hero-copy h1{
  font-family:var(--serif);font-weight:600;color:#fff;
  font-size:clamp(2.6rem,7.2vw,5.6rem);line-height:1.02;letter-spacing:-.025em;
  margin:0 0 1rem;max-width:16ch;
  opacity:0;animation:rise 1s .4s forwards;
}
.hero-copy p{
  color:#E9F0E9;font-size:clamp(1rem,1.5vw,1.18rem);max-width:44ch;margin:0 0 1.8rem;
  opacity:0;animation:rise 1s .58s forwards;
}
.hero-cta{display:flex;gap:.8rem;flex-wrap:wrap;opacity:0;animation:rise 1s .74s forwards}
@keyframes rise{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

.btn-xp{
  display:inline-flex;align-items:center;gap:.5em;border-radius:999px;
  padding:.92em 1.9em;font-size:.92rem;font-weight:600;letter-spacing:.01em;
  text-decoration:none;border:1.5px solid transparent;cursor:pointer;
  transition:transform .2s,background .2s,color .2s,border-color .2s;
}
.btn-xp:hover{transform:translateY(-2px)}
.btn-solid{background:#fff;color:var(--fern-deep);border-color:#fff}
.btn-solid:hover{background:var(--mint)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.55);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:#fff;color:var(--fern-deep)}
.btn-fern{background:var(--fern);color:#fff;border-color:var(--fern)}
.btn-fern:hover{background:var(--fern-deep);border-color:var(--fern-deep)}

.scroll-cue{
  position:absolute;bottom:1.4rem;left:50%;transform:translateX(-50%);z-index:4;
  width:22px;height:36px;border:1.5px solid rgba(255,255,255,.6);border-radius:12px;
}
.scroll-cue::after{
  content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;border-radius:2px;
  background:#fff;transform:translateX(-50%);animation:cue 1.7s infinite;
}
@keyframes cue{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,13px)}}

/* ---------- 通用滚动揭示 ---------- */
.rv{opacity:0;transform:translateY(34px);transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}
.rv-d1{transition-delay:.1s}.rv-d2{transition-delay:.2s}.rv-d3{transition-delay:.3s}.rv-d4{transition-delay:.4s}

/* ---------- 大字陈述 ---------- */
.statement{padding:clamp(6rem,16vh,11rem) 0;text-align:center}
.statement h2{
  font-family:var(--serif);font-weight:400;letter-spacing:-.02em;
  font-size:clamp(1.8rem,4.4vw,3.3rem);line-height:1.24;margin:0 auto;max-width:22ch;
}
.statement h2 em{font-style:normal;color:var(--fern);font-weight:600}
.statement .sub{margin:1.8rem auto 0;max-width:52ch;color:var(--muted);font-size:1.05rem}

/* ---------- 滚动驱动旋转 ---------- */
.turn{position:relative;background:var(--cream)}
.turn-sticky{
  position:sticky;top:0;height:100svh;display:flex;align-items:center;
  justify-content:center;overflow:hidden;
}
@media(min-width:1100px){.turn-stage{margin-right:min(20vw,340px)}}
.turn-bg{
  position:absolute;inset:0;
  background:radial-gradient(120% 90% at 50% 42%,var(--mint) 0%,var(--cream) 58%,var(--cream) 100%);
  transition:background .5s ease,opacity .5s ease;
}
/* 交互时景深收拢，产生"聚焦到产品上"的开合感 */
.turn-bg.focus{background:radial-gradient(96% 74% at 50% 44%,#DDEBDC 0%,#F3EFE6 52%,#FDFBF6 100%)}
.turn-stage{
  /* 高度驱动 + aspect-ratio 反推宽度：既能放大，又不会在矮屏（如 1440x900）溢出 */
  position:relative;height:min(80svh,calc(min(96vw,1500px) * 3 / 4));
  width:auto;aspect-ratio:4/3;z-index:2;
  cursor:grab;touch-action:pan-y;          /* 竖滑翻页，横滑转产品 —— 两不打架 */
  transform:scale(.92);transition:transform .55s cubic-bezier(.2,.7,.3,1);
  will-change:transform;
}
.turn-stage.open{transform:scale(1)}        /* 进入视野：展开 */
.turn-stage.lively{transform:scale(1.04)}   /* 手放上去/拖动：再张开一点 */
.turn-stage.dragging{cursor:grabbing;transition:none}
.turn-stage img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:contain;
  opacity:0;will-change:opacity;
}
.turn-stage img.on{opacity:1}          /* 无 JS 时的兜底：只显首帧 */
.turn-label{position:absolute;inset:0;z-index:5;pointer-events:none}
.turn-label .n{
  display:block;font-family:var(--serif);font-size:.76rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--meadow);margin-bottom:.5rem;
}
.turn-label .t{
  font-family:var(--serif);font-size:clamp(1.4rem,3vw,2.3rem);font-weight:600;
  color:var(--fern-deep);margin:0 0 .4rem;letter-spacing:-.015em;
}
.turn-label .d{color:var(--muted);font-size:.95rem;margin:0}
/* 卖点文案固定右上角（2026-08-21 按 Tony 要求：位置恒定，视线不用追）
   只做纵向淡入淡出，不再四角轮转。 */
.turn-label>div{
  position:absolute;opacity:0;
  right:clamp(20px,4vw,64px);top:clamp(5.5rem,13vh,9rem);
  max-width:min(30ch,34vw);text-align:right;
  transform:translateY(16px);
  transition:opacity .45s cubic-bezier(.2,.7,.3,1),transform .45s cubic-bezier(.2,.7,.3,1);
}
.turn-label>div.on{opacity:1;transform:none}
@media(max-width:1099px){
  .turn-label>div{
    right:auto;left:clamp(16px,5vw,40px);top:auto;bottom:clamp(3rem,6vh,4.4rem);
    max-width:min(34ch,86vw);text-align:left;
  }
}
.turn-prog{
  /* 竖向：与滚动方向一致才跟手。2026-08-21 由横改竖。 */
  position:absolute;right:clamp(14px,3.2vw,46px);top:50%;transform:translateY(-50%);z-index:6;
  width:3px;height:min(34svh,300px);
  background:rgba(31,68,51,.12);border-radius:3px;overflow:hidden;
}
.turn-prog i{
  display:block;width:100%;height:0;background:var(--fern);border-radius:3px;
  transition:height .1s linear;
}
.turn-prog::after{                 /* 顶端小刻度，暗示"从这里往下" */
  content:"";position:absolute;left:50%;top:-9px;width:7px;height:7px;
  transform:translateX(-50%);border-radius:50%;background:rgba(31,68,51,.22);
}
@media(max-width:640px){.turn-prog{right:10px;height:26svh;width:2.5px}}

/* ---------- Bento 细节 ---------- */
.bento-sec{padding:clamp(5rem,12vh,9rem) 0;background:linear-gradient(180deg,var(--cream) 0%,var(--mint) 100%)}
.sec-head{max-width:60ch;margin:0 auto clamp(2.6rem,6vh,4rem);text-align:center}
.sec-head .k{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--meadow);font-weight:600;margin:0 0 .9rem}
.sec-head h2{font-family:var(--serif);font-size:clamp(1.9rem,4vw,2.9rem);font-weight:600;margin:0 0 .8rem;letter-spacing:-.02em}
.sec-head p{color:var(--muted);margin:0}
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(.8rem,1.6vw,1.4rem)}
.bcard{
  position:relative;border-radius:22px;overflow:hidden;background:var(--paper);
  box-shadow:0 18px 44px -30px rgba(26,35,30,.5);
}
.bcard img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.3,1)}
.bcard:hover img{transform:scale(1.05)}
.bcard .cap{
  position:absolute;left:0;right:0;bottom:0;padding:1.5rem 1.4rem 1.3rem;color:#fff;
  background:linear-gradient(180deg,rgba(20,35,26,0),rgba(20,35,26,.72));
}
.bcard .cap h3{font-family:var(--serif);font-size:1.12rem;margin:0 0 .25rem;font-weight:600}
.bcard .cap p{margin:0;font-size:.86rem;opacity:.9;line-height:1.45}
.b-a{grid-column:span 2;aspect-ratio:1}
.b-b{grid-column:span 2;aspect-ratio:1}
.b-c{grid-column:span 2;aspect-ratio:1}
.b-d{grid-column:span 2;aspect-ratio:1}
@media(max-width:760px){.bento{grid-template-columns:repeat(2,1fr)}.b-a,.b-b,.b-c,.b-d{grid-column:span 2;aspect-ratio:4/3}}

/* ---------- 全幅生活场景 ---------- */
.life{position:relative;height:clamp(520px,86svh,880px);overflow:hidden}
.life img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;will-change:transform}
.life::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,35,26,.56),rgba(20,35,26,.12) 58%,transparent)}
.life-copy{position:relative;z-index:3;height:100%;display:flex;align-items:center}
.life-copy .inner{max-width:36ch;color:#fff}
.life-copy h2{font-family:var(--serif);font-size:clamp(1.9rem,4.2vw,3.1rem);font-weight:600;margin:0 0 .9rem;letter-spacing:-.02em;line-height:1.12}
.life-copy p{font-size:1.05rem;color:#E8F0E8;margin:0}

/* ---------- 规格 + 购买 ---------- */
.buy-sec{padding:clamp(5rem,12vh,9rem) 0;background:var(--cream)}
.buy-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4.5rem);align-items:center}
@media(max-width:900px){.buy-grid{grid-template-columns:1fr}}
.buy-media{border-radius:26px;overflow:hidden;background:var(--mint)}
.buy-media img{width:100%;aspect-ratio:4/3;object-fit:contain}
.price-xp{display:flex;align-items:baseline;gap:.8rem;margin:.4rem 0 .3rem}
.price-xp .now{font-family:var(--serif);font-size:clamp(2.2rem,4.6vw,3rem);font-weight:600;color:var(--fern-deep)}
.price-xp .was{color:var(--muted);text-decoration:line-through;font-size:1rem}
.price-xp .save{background:var(--bloom);color:#fff;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:.32em .75em;border-radius:999px}
.spec-xp{width:100%;border-collapse:collapse;margin:2rem 0;font-size:.93rem}
.spec-xp th,.spec-xp td{text-align:left;padding:.72em 0;border-bottom:1px solid var(--line);vertical-align:top}
.spec-xp th{color:var(--muted);font-weight:500;width:46%}
.trust-xp{display:flex;flex-wrap:wrap;gap:.9rem 1.8rem;margin-top:1.6rem;font-size:.86rem;color:var(--muted)}
.trust-xp span::before{content:"✓";color:var(--meadow);font-weight:700;margin-right:.45em}

/* ---------- 页脚 ---------- */
.xp-foot{background:var(--fern-deep);color:#C7D8CB;padding:4rem 0 2.4rem;font-size:.9rem;text-align:center}
.xp-foot .fb{font-family:var(--serif);font-size:1.35rem;color:#fff;letter-spacing:.08em;text-transform:lowercase;margin-bottom:.7rem}
.xp-foot a{color:#C7D8CB}
.xp-foot .fl{display:flex;gap:1.4rem;justify-content:center;flex-wrap:wrap;margin:1.4rem 0}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
}

/* ---------- 可拖动提示 ----------
   贴在产品框右上角的留白区（产品占框高 74% 居中 → 顶部约 13% 是空的），
   绝不进入下方文字区。2026-08-21：原先放在文字区上方，压住了标题。 */
.spin-hint{
  position:absolute;top:1.5%;right:2.5%;z-index:7;
  display:inline-flex;align-items:center;gap:.45em;
  padding:.46em .95em;border-radius:999px;
  background:rgba(255,255,255,.88);backdrop-filter:blur(8px);
  border:1px solid rgba(37,84,60,.16);
  font-size:.74rem;letter-spacing:.05em;color:var(--fern);font-weight:600;
  box-shadow:0 6px 20px -14px rgba(26,35,30,.6);
  transition:opacity .4s,transform .4s;pointer-events:none;white-space:nowrap;
}
.spin-hint.hide{opacity:0;transform:translateY(-6px)}
.spin-hint svg{width:14px;height:14px;flex:none}
@media(max-width:640px){.spin-hint{font-size:.68rem;padding:.4em .8em;top:1%;right:2%}}