@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;600&display=swap');

/* Yovoca — shared styles for /guides/ content pages
   Brand: Sound Gallery (warm paper, Fraunces + Instrument Sans, vermilion/brass) */
:root{
  --paper:#F7F4EE; --porcelain:#FFFFFF; --mist:#F1EDE6;
  --hairline:#E5DFD4; --hairline-deep:#D8D1C2;
  --ink:#1A1713; --muted:#756D60;
  --brass:#8A6B3D; --brass-deep:#6E5430; --verm:#B8421F;
  --ease:cubic-bezier(0.16,1,0.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
body{font-family:'Instrument Sans',system-ui,sans-serif;color:var(--ink);line-height:1.68;-webkit-font-smoothing:antialiased;overflow-x:clip;
  background:radial-gradient(130% 80% at 50% -20%, var(--porcelain), var(--paper) 55%) no-repeat fixed, var(--paper)}
.serif{font-family:'Fraunces',Georgia,serif}
a{color:var(--verm);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:720px;margin:0 auto;padding:0 24px}

/* nav */
nav{border-bottom:1px solid var(--hairline);background:var(--paper)}
.nav-in{max-width:1080px;margin:0 auto;padding:18px 24px;display:flex;justify-content:space-between;align-items:center}
.brand{text-decoration:none;color:var(--ink)}
.brand:hover{text-decoration:none}
/* 字标与首页一致:Yo 正 / voca 斜 + 朱砂句点,WONK 异形轴,无图标 */
.logo{font-family:'Fraunces',Georgia,serif;font-size:1.4rem;font-weight:560;letter-spacing:-.015em;line-height:1;display:inline-flex;align-items:baseline;font-variation-settings:"opsz" 144,"WONK" 1}
.logo i{font-style:italic;font-weight:500}
.logo .dot{width:.17em;height:.17em;border-radius:50%;background:var(--verm);margin-left:.09em;align-self:flex-end;margin-bottom:.06em}
.nav-cta{font-size:.85rem;font-weight:500;color:var(--ink);border:1px solid var(--ink);border-radius:99px;padding:8px 20px;background:transparent;transition:background .3s var(--ease),color .3s var(--ease)}
.nav-cta:hover,.nav-cta:focus-visible{background:var(--ink);color:var(--paper);text-decoration:none}

/* The Line · 永不断线 —— 与首页同一品牌母题:左缘鎏铜信号随阅读向下穿行(JS 注入 --pp) */
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.7)}}
.rail{position:fixed;left:13px;top:90px;bottom:24px;width:7px;z-index:5;pointer-events:none}
.rail i{position:absolute;display:block}
.rail-track{left:3px;top:0;bottom:0;width:1px;background:var(--hairline)}
.rail-signal{left:3px;top:0;height:100%;width:1px;background:var(--brass);transform:scaleY(var(--pp,0));transform-origin:top}
.rail-head{left:0;top:calc(var(--pp,0)*100%);width:7px;height:7px;margin-top:-3px;border-radius:50%;background:var(--brass);animation:pulse 2s var(--ease) infinite}
@media(max-width:900px){.rail{display:none}}
@media(prefers-reduced-motion:reduce){.rail-head{animation:none}}

/* article */
article{padding:44px 0 24px;position:relative}
/* hero motif: large faint kanji bleeding behind the title — instant cultural identity */
.hero-kanji{position:absolute;top:-26px;right:-26px;font-family:'Noto Serif JP',serif;font-weight:600;
  font-size:clamp(150px,26vw,300px);line-height:1;color:var(--brass);opacity:.07;
  pointer-events:none;user-select:none;z-index:0}
.crumb,.eyebrow,h1,.standfirst,.meta-row{position:relative;z-index:1}
/* section headers as quiet gallery labels */
article>h2::before{content:"";display:block;width:30px;height:2px;border-radius:2px;background:var(--brass);opacity:.5;margin-bottom:18px}
.crumb{font-size:.8rem;color:var(--muted);margin-bottom:26px;letter-spacing:.01em}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--verm)}
.eyebrow{font-size:.74rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--verm);margin-bottom:18px}
h1{font-family:'Fraunces',Georgia,serif;font-weight:560;font-size:clamp(2rem,5vw,2.9rem);line-height:1.08;letter-spacing:-0.02em;margin-bottom:20px}
.standfirst{font-size:1.18rem;color:var(--muted);margin-bottom:24px;line-height:1.55}
.meta-row{display:flex;gap:16px;align-items:center;font-size:.82rem;color:var(--muted);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);padding:14px 0;margin-bottom:36px;flex-wrap:wrap}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--hairline-deep)}

article p{font-size:1.075rem;margin-bottom:22px}
article h2{font-family:'Fraunces',Georgia,serif;font-weight:560;font-size:1.62rem;letter-spacing:-0.01em;margin:46px 0 16px;line-height:1.2}
article h3{font-size:1.12rem;font-weight:600;margin:28px 0 8px}
article ul{margin:0 0 22px 0;padding-left:0;list-style:none}
article ul li{position:relative;padding-left:26px;margin-bottom:11px;font-size:1.06rem}
article ul li::before{content:"";position:absolute;left:6px;top:.66em;width:6px;height:6px;border-radius:50%;background:var(--verm)}
strong{font-weight:600}
.lead-cap::first-letter{font-family:'Fraunces',Georgia,serif;font-size:3.1rem;line-height:.8;float:left;padding:6px 10px 0 0;color:var(--verm);font-weight:500}

/* phrase list — bilingual "specimen cards": the Japanese is the exhibit */
.phrases{display:grid;grid-template-columns:repeat(auto-fit,minmax(248px,1fr));gap:14px;margin:14px 0 30px;counter-reset:phr}
.phrase{position:relative;display:flex;flex-direction:column;gap:8px;counter-increment:phr;
  background:var(--porcelain);border:1px solid var(--hairline);border-radius:16px;padding:22px 22px 18px;
  box-shadow:0 1px 2px rgba(26,23,19,.03);transition:border-color .3s var(--ease),transform .3s var(--ease)}
.phrase:hover{border-color:var(--hairline-deep);transform:translateY(-2px)}
.phrase::before{content:counter(phr,decimal-leading-zero);position:absolute;top:15px;right:17px;
  font-size:.68rem;font-weight:600;letter-spacing:.08em;color:var(--brass);opacity:.55}
.phrase .en{font-size:.82rem;font-weight:600;color:var(--muted);padding-right:26px;line-height:1.4}
.phrase .jp{font-family:'Noto Serif JP','Fraunces',serif;font-weight:600;font-size:1.5rem;line-height:1.4;color:var(--ink);letter-spacing:.01em}
.phrase .ro{font-size:.86rem;color:var(--brass-deep);font-style:italic;margin-top:-1px}

/* solution / waitlist */
.solution{background:var(--ink);color:var(--paper);border-radius:22px;padding:36px 32px;margin:44px 0}
.solution .tag{font-size:.72rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:#E8A48C;margin-bottom:14px}
.solution h2{font-family:'Fraunces',Georgia,serif;color:#fff;margin:0 0 12px;font-size:1.7rem}
.solution p{color:rgba(247,244,238,.74);font-size:1.04rem;margin-bottom:22px}
.wl{display:flex;gap:10px}
.wl input{flex:1;min-width:0;font:inherit;font-size:.98rem;padding:13px 16px;border-radius:12px;border:1px solid rgba(247,244,238,.2);background:rgba(247,244,238,.07);color:#fff;outline:none;transition:border-color .25s var(--ease)}
.wl input::placeholder{color:rgba(247,244,238,.45)}
.wl input:focus{border-color:var(--verm)}
.wl button{font:inherit;font-size:.98rem;font-weight:600;color:#fff;background:var(--verm);border:none;border-radius:12px;padding:13px 22px;cursor:pointer;white-space:nowrap;transition:transform .15s var(--ease),background .25s var(--ease)}
.wl button:hover{background:#9c3618}
.wl button:active{transform:scale(.97)}
.wl button:disabled{opacity:.6;cursor:wait}
.gotcha{position:absolute;left:-9999px}
.wl-note{font-size:.8rem;color:rgba(247,244,238,.5);margin-top:11px}
.wl-msg{font-size:.92rem;margin-top:12px;display:none}
.wl-msg.ok{display:block;color:#9ED6AE}
.wl-msg.err{display:block;color:#F0A89A}

/* faq */
.faq details{border-bottom:1px solid var(--hairline);padding:18px 0}
.faq summary{font-weight:600;font-size:1.06rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--verm);font-size:1.3rem;flex:none;transition:transform .25s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:12px 0 0;color:var(--muted);font-size:1.02rem}

/* related */
.related{margin-top:40px;color:var(--muted);font-size:.98rem}
.related a{font-weight:500}

/* footer */
footer{border-top:1px solid var(--hairline);margin-top:54px;padding:36px 0}
.foot-in{max-width:1080px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;align-items:center}
.foot-in .ety{font-size:.84rem;color:var(--muted)}
.foot-in .ety i{font-style:italic}
.foot-in .copy{font-size:.78rem;color:var(--muted)}

@media(max-width:560px){
  .wl{flex-direction:column}
  .wl button{width:100%}
  .solution{padding:28px 22px}
}