/* 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:#BF360C; /* 品牌橙(深):文字/CTA 对比度 5.6:1 达标 */
  --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}
/* 结构化页面(定价/设置等)用更宽的框,区别于 720 编辑式阅读列;正文由页面自设可读上限 */
.wrap.wide{max-width:960px}

/* 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=首页同款组合锁(声波图标 + Yo/voca + 句点),共享 asset 文件 */
.logo-svg{height:30px;width:auto;display:block}
.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}
.nav-right{display:flex;align-items:center;gap:18px}
.nav-link{font-size:.85rem;font-weight:500;color:var(--muted)}
.nav-link:hover,.nav-link:focus-visible{color:var(--ink);text-decoration:none}
.nav-link[aria-current="page"]{color:var(--ink)}

/* 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;overflow:clip}
/* 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)}
article ol{margin:0 0 24px 0;padding-left:0;list-style:none;counter-reset:steps}
article ol li{position:relative;padding-left:38px;margin-bottom:14px;font-size:1.06rem;counter-increment:steps}
article ol li::before{content:counter(steps);position:absolute;left:0;top:.08em;width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;background:var(--ink);color:var(--paper);font-size:.78rem;font-weight:600;font-variant-numeric:tabular-nums}
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}

/* editorial imagery */
.photo{margin:28px 0 34px}
.photo img{display:block;width:100%;height:auto;border-radius:18px;border:1px solid var(--hairline);background:var(--mist);
  object-fit:cover;box-shadow:0 18px 44px -30px rgba(26,23,19,.34)}
.photo.hero img{aspect-ratio:16/10}
.photo.inline img{aspect-ratio:4/3}
.photo figcaption{font-size:.76rem;color:var(--muted);margin-top:9px;line-height:1.45}
.photo figcaption a{color:var(--muted);text-decoration:underline;text-decoration-color:var(--hairline-deep);text-underline-offset:3px}
.photo-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px;margin:28px 0 34px}
.photo-row .photo{margin:0}
@media(max-width:620px){.photo-row{grid-template-columns:1fr}}

/* explanatory blocks for flagship guides */
.callout{background:var(--porcelain);border:1px solid var(--hairline);border-radius:18px;padding:24px 24px 2px;margin:28px 0}
.callout h2,.callout h3{margin-top:0}
.callout h2::before{display:none}
.callout p{font-size:1.02rem;color:var(--muted)}
.callout strong{color:var(--ink)}
.mini-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:18px 0 30px}
.mini{background:var(--porcelain);border:1px solid var(--hairline);border-radius:16px;padding:20px}
.mini .k{display:block;font-size:.72rem;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--verm);margin-bottom:8px}
.mini h3{margin:0 0 7px;font-size:1.02rem}
.mini p{margin:0;color:var(--muted);font-size:.98rem;line-height:1.55}

/* 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:0;width:1px;height:1px;opacity:0;pointer-events:none;clip:rect(0 0 0 0);clip-path:inset(50%);overflow:hidden}
.wl-note{font-size:.8rem;color:rgba(247,244,238,.5);margin-top:11px}
.wl-note a{color:rgba(247,244,238,.82);text-decoration:underline;text-decoration-color:rgba(247,244,238,.28);text-underline-offset:3px}
.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}
/* source-of-record line for pages that assert external facts (competitor/vs pages).
   「Sources checked on YYYY-MM-DD」+ 一方来源清单;首用于 ios-26 页,2026-07-30 提到共享层。 */
.sources{font-family:'Instrument Sans',system-ui,sans-serif;font-size:.82rem;line-height:1.6;color:var(--muted);border-top:1px solid var(--hairline);padding-top:14px;margin:34px 0 0}
.sources strong{color:var(--ink);font-weight:500}
.sources a{color:var(--verm)}

/* 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)}
.foot-links{display:flex;gap:14px;flex-wrap:wrap;font-size:.78rem;align-items:center}
/* 语言选择器:跟 guide footer 链接(.foot-links a)同款——muted + 发丝线下划线 */
.foot-links .yv-lang{color:var(--muted);font-size:.78rem;border-bottom-color:var(--hairline-deep)}
.foot-links .yv-lang:hover,.foot-links .yv-lang:focus-visible{border-bottom-color:var(--muted)}
.foot-links a{color:var(--muted);text-decoration:underline;text-decoration-color:var(--hairline-deep);text-underline-offset:3px}

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

/* 试打热线卡(展签式,复用首页 hero 决策;spec §九) */
.hotline-card{display:block;border:1px solid var(--hairline);background:var(--porcelain);
  padding:1.1rem 1.25rem;margin:0 0 1.1rem;text-decoration:none;color:inherit}
.hotline-card:hover{border-color:var(--ink);text-decoration:none}
.hotline-kicker{display:flex;align-items:center;gap:.45rem;font-size:.72rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted)}
.hotline-kicker .dot{width:.45rem;height:.45rem;border-radius:50%;background:var(--verm)}
.hotline-num{display:block;font-family:"Fraunces",serif;font-size:1.6rem;color:var(--ink);
  margin:.35rem 0 .3rem;font-weight:600}
.hotline-what{display:block;font-size:.92rem;line-height:1.5;margin-bottom:.35rem}
.hotline-micro{display:block;font-size:.78rem;color:var(--muted);line-height:1.5}