:root{
  --brand:#a4642f;--brand-d:#8a5226;--brand-l:#f9eee1;
  --ink:#1f1b17;--ink2:#524b43;--ink3:#857c72;
  --bg:#fff;--bg2:#fbf7f0;--line:#efe7db;--wrap:1140px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font:inherit;background:none;border:0;cursor:pointer;color:inherit}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.sh{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.88);backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .2s}
.sh.on{border-bottom-color:var(--line)}
.sh-in{display:flex;align-items:center;gap:26px;height:66px}
.sh-brand{display:flex;align-items:center;gap:10px;flex:none}
.sh-brand img{width:38px;height:38px;border-radius:11px;object-fit:cover}
.sh-brand strong{display:block;font-size:16px;letter-spacing:.2px;line-height:1.2}
.sh-brand small{display:block;font-size:11px;color:var(--ink3);letter-spacing:.4px}
.sh nav{display:flex;gap:24px;margin-left:auto;font-size:14px;color:var(--ink2)}
.sh nav a{position:relative;padding:6px 0}
.sh nav a:hover{color:var(--brand)}
.sh nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .2s}
.sh nav a:hover::after{transform:scaleX(1)}
.sh-cta{flex:none;display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:19px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;transition:.2s}
.sh-cta:hover{background:var(--brand-d)}
.sh-menu{display:none;margin-left:auto;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:52px;padding:0 30px;border-radius:26px;
  background:var(--brand);color:#fff;font-size:16px;font-weight:600;letter-spacing:.3px;
  box-shadow:0 12px 26px -12px rgba(0,0,0,.45);transition:transform .18s,background .18s}
.btn:hover{background:var(--brand-d);transform:translateY(-1px)}
.btn svg{width:18px;height:18px}
.ghost{display:inline-flex;align-items:center;height:52px;padding:0 6px;font-size:14.5px;font-weight:600;
  color:var(--brand);border-bottom:1px solid rgba(164,100,47,.4)}
.ghost:hover{border-bottom-color:var(--brand)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:70px 0 78px}
.hero--stack{background:linear-gradient(170deg,#fdf3e6,#fff 64%)}
.hero-in{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1.6px;color:var(--brand);
  font-weight:700}
.kicker i{width:22px;height:2px;background:var(--brand);display:inline-block}
.hero h1{font-size:56px;line-height:1.06;letter-spacing:-1.2px;margin:16px 0 14px;font-weight:800}
.hero .lead{font-size:21px;font-weight:600;color:var(--ink);margin-bottom:12px}
.hero .desc{font-size:15px;color:var(--ink2);max-width:520px;line-height:1.85}
.acts{display:flex;align-items:center;gap:16px;margin:26px 0 24px;flex-wrap:wrap}
.facts{display:flex;gap:30px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:20px}
.facts li{font-size:14px;font-weight:700}
.facts li span{display:block;font-size:12.5px;color:var(--ink3);font-weight:400;margin-top:2px}
.upd{font-size:12.5px;color:var(--ink3);margin-top:14px}
.art-stack{position:relative;height:520px}
.art-stack .cover{position:absolute;width:228px;height:420px;border-radius:10px;overflow:hidden;
  box-shadow:0 26px 45px -22px rgba(18,20,26,.5);border:4px solid #fff}
.art-stack .cover img{width:100%;height:100%;object-fit:cover}
.art-stack .c1{left:2%;top:62px;transform:rotate(-8deg);z-index:2}
.art-stack .c2{left:50%;top:0;transform:translateX(-50%);z-index:3;width:248px;height:466px}
.art-stack .c3{right:2%;top:78px;transform:rotate(8deg);z-index:1}
.art-stack::before{content:"";position:absolute;left:50%;top:34px;transform:translateX(-50%);
  width:360px;height:360px;border-radius:50%;background:radial-gradient(closest-side,rgba(164,100,47,.16),transparent 72%)}
.art-stack::after{content:"";position:absolute;left:50%;bottom:16px;transform:translateX(-50%);
  width:62%;height:22px;background:radial-gradient(closest-side,rgba(20,22,27,.2),transparent);filter:blur(6px)}

/* ---------- progress ---------- */
.progress{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.progress-in{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;padding:20px 22px}
.pg{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--ink3)}
.pg b{font-size:13px;color:var(--ink);font-weight:700}
.track{display:block;height:5px;border-radius:3px;background:#ece2d4;overflow:hidden}
.track i{display:block;height:100%;background:var(--brand);border-radius:3px}

/* ---------- section 公共 ---------- */
section{position:relative}
.sec{padding:84px 0}
.sec-h{max-width:660px;margin-bottom:42px}
.sec-k{font-size:12px;letter-spacing:2px;font-weight:700;color:var(--brand);text-transform:uppercase}
.sec-h h2{font-size:38px;line-height:1.2;letter-spacing:-.6px;margin:10px 0 12px;font-weight:800}
.sec-h p{font-size:15px;color:var(--ink2)}

/* ---------- feat ---------- */
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.fcard{position:relative;border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:0 16px 16px 0;padding:24px 26px 22px;background:#fff;
  box-shadow:0 14px 30px -26px rgba(31,27,23,.4);transition:transform .2s,border-color .2s}
.fcard:hover{transform:translateX(2px);border-left-color:var(--brand-d)}
.fcard .no{display:inline-flex;align-items:center;justify-content:center;min-width:30px;height:26px;
  border-radius:7px;background:var(--brand-l);border:1px solid rgba(164,100,47,.28);
  font-size:12px;font-weight:800;color:var(--brand);letter-spacing:1px}
.fcard h4{font-size:19px;font-weight:700;margin:10px 0 6px}
.fcard p{font-size:14px;color:var(--ink2)}

/* ---------- show ---------- */
.show{background:var(--bg2)}
.show-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:46px;align-items:center}
.frame{border-radius:22px;overflow:hidden;background:#fff;border:1px solid var(--line);
  box-shadow:0 30px 60px -34px rgba(18,20,26,.45)}
.frame img{width:100%;height:430px;object-fit:cover;object-position:top}
.frame figcaption{font-size:12.5px;color:var(--ink3);padding:11px 16px;border-top:1px solid var(--line)}
.notes{display:grid;gap:18px}
.note{border-left:2px solid var(--brand-l);padding-left:16px}
.note b{display:block;font-size:16px;font-weight:700;margin-bottom:4px}
.note p{font-size:14.5px;color:var(--ink2)}
.mini-shots{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.mini-shots figure{border-radius:18px;overflow:hidden;background:#fff;border:1px solid var(--line)}
.mini-shots img{width:100%;height:210px;object-fit:cover;object-position:top}
.mini-shots figcaption{font-size:12.5px;color:var(--ink3);padding:10px 14px}

/* ---------- guide ---------- */
.gbox{max-width:760px;counter-reset:gstep;border-left:2px dashed var(--brand-l);padding-left:34px}
.gbox ol{display:grid;gap:20px}
.gbox li{position:relative;font-size:14.5px;color:var(--ink2)}
.gbox li::before{counter-increment:gstep;content:counter(gstep);position:absolute;left:-56px;top:-3px;
  width:34px;height:34px;border-radius:11px;background:var(--brand-l);border:1px solid rgba(164,100,47,.3);
  color:var(--brand);font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center}
.gnote{margin-top:24px;padding:14px 18px;border-radius:12px;background:var(--brand-l);
  font-size:13.5px;color:#7c4d22}

/* ---------- faq ---------- */
.qa{border-top:1px solid var(--line)}
.qrow{border-bottom:1px solid var(--line);padding:22px 0}
.qrow h3{display:flex;align-items:baseline;gap:10px;font-size:17px;font-weight:700;margin-bottom:8px}
.qrow h3 span{flex:none;font-size:12px;font-weight:800;color:var(--brand);letter-spacing:1px;
  background:var(--brand-l);border-radius:6px;padding:2px 7px}
.qrow p{font-size:14.5px;color:var(--ink2);padding-left:44px}

/* ---------- rev ---------- */
.rev{background:var(--bg2)}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.voice{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px 24px 20px;
  font-size:14.5px;color:var(--ink2)}
.stars{color:var(--brand);font-size:13px;letter-spacing:2px;margin-bottom:10px}
.voice footer{display:flex;align-items:center;gap:9px;margin-top:16px;font-size:12.5px;color:var(--ink3)}
.voice footer i{width:26px;height:26px;border-radius:50%;background:var(--brand-l);color:var(--brand);
  font-style:normal;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.voice footer cite{font-style:normal}
.voice footer time{margin-left:auto;font-size:12px;color:var(--ink3);font-variant-numeric:tabular-nums}

/* ---------- dl ---------- */
.dl{background:#241d17;color:#fff;padding:64px 0}
.dl-in{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.dl-logo{width:76px;height:76px;border-radius:18px;object-fit:cover;border:3px solid rgba(255,255,255,.18)}
.dl-in>div{flex:1;min-width:280px}
.dl h2{font-size:34px;letter-spacing:-.5px;margin-bottom:8px;font-weight:800}
.dl p{font-size:14.5px;color:rgba(255,255,255,.68);max-width:560px}
.dl-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;font-size:12px;color:rgba(255,255,255,.7)}
.dl-meta span{border:1px solid rgba(255,255,255,.22);border-radius:20px;padding:3px 12px}

/* ---------- footer ---------- */
.ft{border-top:1px solid var(--line);padding:40px 0 34px}
.ft-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.ft-brand{display:flex;align-items:center;gap:10px}
.ft-brand img{width:32px;height:32px;border-radius:9px;object-fit:cover}
.ft-brand strong{font-size:15px}
.ft p{font-size:12.5px;color:var(--ink3);max-width:420px;margin-top:10px}
.ft-col{display:flex;flex-direction:column;gap:7px;font-size:13px;color:var(--ink3)}
.ft-col h4{font-size:13px;color:var(--ink);font-weight:700;margin-bottom:2px}
.ft-col a:hover{color:var(--brand)}
.ft-copy{font-size:12px;color:var(--ink3);margin-top:22px;border-top:1px solid var(--line);padding-top:16px}

/* ---------- backtop ---------- */
.backtop{position:fixed;right:24px;bottom:84px;z-index:50;width:42px;height:42px;border-radius:50%;
  display:none;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);
  color:var(--ink);box-shadow:0 12px 26px -14px rgba(18,20,26,.55)}
.backtop.on{display:flex}
.backtop:hover{color:var(--brand);border-color:var(--brand)}

/* 入场：加载即播，无 JS 也可见 */
.rv{animation:rvIn .5s ease both}
@keyframes rvIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.rv{animation:none}}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .sec{padding:62px 0}
  .sec-h h2{font-size:30px}
  .hero h1{font-size:42px}
  .hero-in,.show-grid{grid-template-columns:1fr;gap:34px}
  .art-stack{height:430px;transform:scale(.92)}
  .progress-in{grid-template-columns:1fr;gap:14px}
  .feat-grid,.mini-shots,.rev-grid{grid-template-columns:1fr}
  .sh nav{display:none}
  .sh-menu{display:inline-flex}
  .sh-cta{margin-left:10px}
  .sh nav.open{display:flex;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;
    padding:14px 22px 18px;gap:14px;border-bottom:1px solid var(--line)}
  .frame img{height:340px}
  .gbox{padding-left:26px}
  .gbox li::before{left:-48px;width:30px;height:30px}
  .dl h2{font-size:26px}
  .backtop{right:16px;bottom:76px}
}
@media(max-width:560px){
  .hero{padding:44px 0 54px}
  .hero h1{font-size:34px}
  .hero .lead{font-size:18px}
  .art-stack{height:340px}
  .art-stack .cover{width:150px;height:300px}
  .art-stack .cover.c2{width:168px;height:332px}
  .art-stack .c1{top:48px}
  .art-stack .c3{top:66px}
  .acts{gap:12px}
  .btn{width:100%}
  .ghost{height:40px;padding:0}
  .facts{gap:18px}
  .frame img{height:240px}
  .mini-shots img{height:170px}
  .qrow p{padding-left:0}
  .dl{padding:48px 0}
}