/* R05 · 单页产品 / 骨架反解自 bauhausclock.com
   基因：米白暖场 · 一个真实可动的产品物 · 色板即选配 · 三档分段控件 · 评价墙 · FAQ */

:root{
  --bg:#f4f1ea;
  --card:#fffdf9;
  --ink:#12110f;
  --muted:#77716a;
  --line:#e0dad0;
  --dial:#1b1b1b;
  --lume:#efe8d8;
  --mark:rgba(239,232,216,.36);
  --mark-strong:rgba(239,232,216,.92);
  --accent:#b4583a;
  --pad:clamp(20px,4vw,56px);
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);
  font-family:"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--ink);color:var(--bg)}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}

/* 顶栏 */
.top{position:sticky;top:0;z-index:40;background:rgba(244,241,234,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.top-in{max-width:1160px;margin:0 auto;padding:0 var(--pad);height:66px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:600;letter-spacing:-.01em}
.brand .mark{width:16px;height:16px;border-radius:50%;border:1.5px solid currentColor;position:relative}
.brand .mark::after{content:"";position:absolute;left:50%;top:50%;width:1.5px;height:5px;background:currentColor;transform-origin:bottom;transform:translate(-50%,-100%) rotate(35deg)}
.nav{display:flex;align-items:center;gap:clamp(12px,2vw,24px)}
.nav a{font-size:13px;color:var(--muted);transition:color .2s}
.nav a:hover,.nav a[aria-current]{color:var(--ink)}
.nav .buy{
  border:1px solid var(--ink);border-radius:999px;padding:8px 16px;color:var(--ink);font-size:12.5px;
  transition:background .25s,color .25s;
}
.nav .buy:hover{background:var(--ink);color:var(--bg)}

/* 首屏 */
.hero{max-width:1160px;margin:0 auto;padding:clamp(38px,6vw,84px) var(--pad) clamp(30px,4vw,56px);
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,72px);align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 13px;background:var(--card)}
.eyebrow i{width:5px;height:5px;border-radius:50%;background:var(--accent);font-style:normal}
.hero h1{
  font-size:clamp(2rem,4.6vw,3.7rem);line-height:1.04;letter-spacing:-.04em;font-weight:600;
  margin:clamp(18px,2.4vw,28px) 0 0;
}
.hero .lede{margin-top:20px;color:var(--muted);font-size:16px;line-height:1.8;max-width:42ch}
.hero-acts{margin-top:clamp(22px,3vw,34px);display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.price-tag{font-size:13px;color:var(--muted)}
.price-tag b{color:var(--ink);font-weight:600;font-size:15px}

.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;
  padding:13px 24px;font-size:14px;background:var(--ink);color:var(--bg);
  transition:transform .2s ease,opacity .2s ease;
}
.btn:hover{transform:translateY(-1px);opacity:.9}
.btn.line{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.line:hover{border-color:var(--ink)}

/* 钟面 */
.clock-stage{display:flex;flex-direction:column;align-items:center;gap:22px}
.clock{
  position:relative;width:min(78vw,400px);aspect-ratio:1;border-radius:50%;
  background:var(--dial);
  box-shadow:
    0 30px 60px -34px rgba(20,18,15,.55),
    inset 0 0 0 1px rgba(255,255,255,.07),
    inset 0 2px 18px rgba(255,255,255,.06);
  transition:background .5s ease;
}
.clock .min-marks{
  position:absolute;inset:4.5%;border-radius:50%;
  background:repeating-conic-gradient(from 0deg,
    var(--mark) 0 .35deg, transparent .35deg 6deg);
  -webkit-mask:radial-gradient(closest-side,transparent 90%,#000 90.5%);
  mask:radial-gradient(closest-side,transparent 90%,#000 90.5%);
}
.clock .hr-marks{
  position:absolute;inset:4.5%;border-radius:50%;
  background:repeating-conic-gradient(from 0deg,
    var(--mark-strong) 0 .9deg, transparent .9deg 30deg);
  -webkit-mask:radial-gradient(closest-side,transparent 82%,#000 82.5%);
  mask:radial-gradient(closest-side,transparent 82%,#000 82.5%);
}
.clock .brand-mini{
  position:absolute;left:0;right:0;top:29%;text-align:center;
  font-size:9px;letter-spacing:.34em;text-transform:uppercase;color:var(--mark);
}
.clock.light{--lume:#1b1b1b;--mark:rgba(27,27,27,.26);--mark-strong:rgba(27,27,27,.74)}
.clock .hand{position:absolute;left:50%;bottom:50%;transform-origin:50% 100%;background:var(--lume);border-radius:2px}
.clock .h-hr{width:3.5px;height:24%;transform:translateX(-50%) rotate(305deg)}
.clock .h-min{width:2.5px;height:34%;transform:translateX(-50%) rotate(72deg)}
.clock .h-sec{width:1.2px;height:38%;background:var(--accent);transform:translateX(-50%) rotate(198deg);transition:transform .6s cubic-bezier(.22,1,.36,1)}
.clock .pin{position:absolute;left:50%;top:50%;width:9px;height:9px;border-radius:50%;background:var(--lume);transform:translate(-50%,-50%)}
.clock .pin::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--dial)}
.clock .idx{position:absolute;left:50%;bottom:9%;transform:translateX(-50%);font-size:10px;letter-spacing:.2em;color:rgba(239,232,216,.42)}

/* 色板 */
.swatches{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;max-width:320px}
.sw{
  width:22px;height:22px;border-radius:50%;border:1px solid rgba(18,17,15,.14);
  box-shadow:0 0 0 0 var(--bg),0 0 0 0 var(--ink);
  transition:box-shadow .2s ease,transform .2s ease;
}
.sw:hover{transform:scale(1.12)}
.sw[aria-pressed="true"]{box-shadow:0 0 0 2px var(--bg),0 0 0 3px var(--ink)}
.swatch-label{font-size:11px;letter-spacing:.08em;color:var(--muted)}

/* 区段 */
.sec{max-width:1160px;margin:0 auto;padding:clamp(44px,6vw,86px) var(--pad)}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:clamp(22px,3vw,36px)}
.sec-head h2{font-size:clamp(1.4rem,2.6vw,2rem);letter-spacing:-.03em;font-weight:600;line-height:1.2;max-width:24ch}
.sec-head .note{font-size:12px;color:var(--muted);white-space:nowrap}

/* 分段控件 */
.seg{display:inline-flex;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px;gap:2px}
.seg button{
  border-radius:999px;padding:8px 16px;font-size:12.5px;color:var(--muted);
  transition:background .22s,color .22s;
}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.seg button:hover:not([aria-pressed="true"]){color:var(--ink)}

/* 特性三栏 */
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2.4vw,30px)}
.feat.one{grid-template-columns:1fr}
.feat-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:clamp(20px,2.4vw,28px)}
.feat-card .k{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.feat-card h3{margin:12px 0 10px;font-size:16.5px;letter-spacing:-.01em;font-weight:600}
.feat-card p{font-size:14px;color:var(--muted);line-height:1.75}

/* 评价墙 */
.quotes{columns:3;column-gap:clamp(14px,2vw,22px)}
@media (max-width:900px){.quotes{columns:2}}
@media (max-width:600px){.quotes{columns:1}}
.quote{
  break-inside:avoid;margin-bottom:clamp(14px,2vw,22px);
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:clamp(16px,2vw,22px);
}
.quote p{font-size:13.5px;line-height:1.8;color:#3c3833}
.quote .who{margin-top:12px;font-size:11.5px;color:var(--muted);letter-spacing:.04em}
.stars{color:var(--accent);font-size:11px;letter-spacing:.18em;margin-bottom:8px}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;padding:18px 0;
  display:flex;justify-content:space-between;gap:18px;align-items:baseline;
  font-size:15px;letter-spacing:-.01em;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--muted);font-size:17px;line-height:1;transition:transform .25s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 20px;font-size:14px;color:var(--muted);line-height:1.8;max-width:68ch}

/* 价格条 */
.buybar{
  background:var(--ink);color:var(--bg);border-radius:18px;
  padding:clamp(26px,3.6vw,44px);display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;
}
.buybar h2{font-size:clamp(1.3rem,2.4vw,1.9rem);letter-spacing:-.03em;font-weight:600;line-height:1.25;max-width:20ch}
.buybar .meta{font-size:12.5px;color:rgba(244,241,234,.62);margin-top:10px}
.buybar .btn{background:var(--bg);color:var(--ink)}

/* 内页：设置面板 */
.panel{
  max-width:1160px;margin:0 auto;padding:clamp(30px,4vw,60px) var(--pad) clamp(40px,6vw,80px);
  display:grid;grid-template-columns:340px 1fr;gap:clamp(24px,4vw,52px);align-items:start;
}
.pane{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.pane h2{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);padding:16px 18px;border-bottom:1px solid var(--line);font-weight:500}
.pane .item{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid var(--line);font-size:13.5px}
.pane .item:last-child{border-bottom:0}
.pane .item span{color:var(--muted);font-size:12.5px}
.preview{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:clamp(24px,4vw,48px);display:flex;flex-direction:column;align-items:center;gap:20px;
}

/* 页脚 */
.foot{border-top:1px solid var(--line);margin-top:clamp(30px,4vw,60px)}
.foot-in{max-width:1160px;margin:0 auto;padding:clamp(26px,3.6vw,44px) var(--pad);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:flex-start}
.foot p{font-size:12.5px;color:var(--muted);max-width:40ch;line-height:1.7}
.foot nav{display:flex;gap:16px;flex-wrap:wrap}
.foot nav a{font-size:12.5px;color:var(--muted)}
.foot nav a:hover{color:var(--ink)}
.foot-btm{max-width:1160px;margin:0 auto;padding:14px var(--pad) 26px;border-top:1px solid var(--line);
  font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

.rv{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s cubic-bezier(.22,1,.36,1)}
.rv.in{opacity:1;transform:none}

@media (max-width:900px){
  .hero{grid-template-columns:1fr}
  .feat{grid-template-columns:1fr}
  .panel{grid-template-columns:1fr}
  .clock{width:min(70vw,340px)}
}
@media (max-width:560px){
  .nav a:not(.buy){display:none}
  .hero h1{font-size:clamp(1.8rem,7.4vw,2.4rem)}
  .buybar{border-radius:14px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .rv{opacity:1;transform:none}
}