/* Coinyara · 宣紙 / 朱印 / 墨線 */
:root {
  --yr-zhi: #f5efe2;
  --yr-zhi-hi: #fbf7ee;
  --yr-zhi-lo: #ece3d0;
  --yr-zhu: #b8322a;
  --yr-zhu-dk: #94241d;
  --yr-mo: #222;
  --yr-mo-2: #4a443c;
  --yr-mo-3: #6d655a;
  --yr-jie: #d6c9ae;
  --yr-jie-zhu: rgba(184, 50, 42, .32);
  --yr-song: "Noto Serif TC", "Songti TC", "PMingLiU", "MingLiU", serif;
  --yr-gutter: 7rem;
  --yr-measure: 42.5rem;
  --yr-paper-grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .36 0 0 0 0 .28 0 0 0 0 .16 0 0 0 .075 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
  --yr-fibre: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='520' height='520'%3E%3Cfilter id='h'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.012 .09' numOctaves='3' seed='7'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .33 0 0 0 0 .2 0 0 0 .11 -.02'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23h)'/%3E%3C/svg%3E");
  --yr-brush: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 640 18' preserveAspectRatio='none'%3E%3Cpath d='M2 10.2C70 8.6 170 7.4 300 8.3c90 .7 200 1.6 336 .9-120 2.4-250 3.6-338 3-120-.8-220-1.2-296-2Z' fill='%23222' fill-opacity='.62'/%3E%3Cpath d='M40 12.6c90-.9 200-1 300-.4 70 .4 160 .2 250-.6-80 1.6-190 2.1-260 1.9-110-.3-200-.4-290-.9Z' fill='%23222' fill-opacity='.18'/%3E%3C/svg%3E");
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--yr-zhi);
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  color: var(--yr-mo);
  font-family: var(--yr-song);
  font-size: 1.0625rem;
  line-height: 1.85;
  font-weight: 400;
  letter-spacing: .02em;
  background-color: var(--yr-zhi);
  background-image: var(--yr-fibre), var(--yr-paper-grain);
  font-feature-settings: "palt" 0;
  text-rendering: optimizeLegibility;
  overflow-wrap: anywhere;
}

img { max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-color: var(--yr-jie-zhu);
  text-decoration-thickness: 1px;
  text-underline-offset: .28em;
  transition: color .2s, text-decoration-color .2s;
}
a:hover { color: var(--yr-zhu); text-decoration-color: var(--yr-zhu); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--yr-zhu);
  outline-offset: 3px;
}

.yr-skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 50;
  background: var(--yr-mo); color: var(--yr-zhi);
  padding: .45rem .9rem; text-decoration: none;
}
.yr-skip:focus { top: .8rem; }

/* ───── 天頭:站名與導覽 ───── */
.yr-top { padding: 0 1.125rem; }
.yr-top-in {
  max-width: 72.5rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0 1.05rem;
  /* 文武線:粗線在上、細線在下 */
  background:
    linear-gradient(var(--yr-mo), var(--yr-mo)) left bottom / 100% 1px no-repeat,
    linear-gradient(var(--yr-mo), var(--yr-mo)) left calc(100% - 4px) / 100% 2.5px no-repeat;
}
.yr-brand {
  display: inline-flex; align-items: center; gap: .7rem;
  text-decoration: none; color: var(--yr-mo);
}
.yr-brand-seal { color: var(--yr-zhu); transform: rotate(-3deg); flex: none; }
.yr-brand-word {
  font-size: 1.32rem; font-weight: 600; letter-spacing: .14em;
}
.yr-nav { display: flex; align-items: center; }
.yr-nav a {
  position: relative;
  padding: .3rem 1.05rem;
  font-size: 1rem; letter-spacing: .3em; text-indent: .3em;
  text-decoration: none; color: var(--yr-mo-2);
}
.yr-nav a + a::before {
  content: ""; position: absolute; left: 0; top: 28%; bottom: 28%;
  width: 1px; background: var(--yr-jie);
}
.yr-nav a[aria-current="page"] { color: var(--yr-zhu); }
.yr-nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 50%; bottom: -.2rem;
  width: .38rem; height: .38rem; margin-left: -.19rem;
  background: var(--yr-zhu); transform: rotate(45deg);
}

/* ───── 主版面:卷 ───── */
.yr-folio {
  counter-reset: juan tu;
  display: grid;
  grid-template-columns:
    [bleed-s] minmax(1.125rem, 1fr)
    [hero-s] minmax(0, 8rem)
    [wide-s] var(--yr-gutter)
    [body-s] minmax(0, 12rem)
    [mid] minmax(0, 30.5rem)
    [body-e] var(--yr-gutter)
    [wide-e] minmax(0, 8rem)
    [hero-e] minmax(1.125rem, 1fr)
    [bleed-e];
  padding-bottom: 5rem;
}
.yr-folio > * { grid-column: body-s / body-e; min-width: 0; }

/* 卷首:標題區 + 山水 */
.yr-folio > header[data-part="hero"] {
  grid-column: hero-s / mid;
  grid-row: 1;
  align-self: center;
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  column-gap: 1.1rem;
  padding: 3.4rem 2.4rem 2.6rem 0;
}
header[data-part="hero"] > * { grid-column: 2; margin: 0; }
header[data-part="hero"] > [data-part="kicker"] {
  grid-column: 1; grid-row: 1 / span 3;
  writing-mode: vertical-rl;
  justify-self: start;
  align-self: start;
  color: var(--yr-zhu);
  font-size: .86rem; letter-spacing: .38em;
  padding: .2rem .55rem .2rem 0;
  border-right: 1px solid var(--yr-jie-zhu);
  white-space: nowrap;
}
header[data-part="hero"] h1 {
  font-size: clamp(1.9rem, 1.1rem + 1.45vw, 2.45rem);
  line-height: 1.38;
  font-weight: 600;
  letter-spacing: .04em;
  text-wrap: balance;
}
header[data-part="hero"] [data-part="dek"] {
  margin-top: 1.35rem;
  font-size: 1.02rem; line-height: 1.95;
  color: var(--yr-mo-2);
}
header[data-part="hero"] [data-part="meta"] {
  margin-top: 1.5rem;
  padding-top: .9rem;
  border-top: 1px solid var(--yr-jie);
  font-size: .9rem; line-height: 1.7;
  color: var(--yr-mo-3);
  display: flex; align-items: flex-start; gap: .65rem;
}
header[data-part="hero"] [data-part="meta"]::before {
  content: "核";
  flex: none;
  width: 1.6rem; height: 1.6rem;
  display: grid; place-items: center;
  font-size: .82rem; font-weight: 900; letter-spacing: 0;
  color: var(--yr-zhi-hi); background: var(--yr-zhu);
  box-shadow: inset 0 0 0 2px var(--yr-zhu), inset 0 0 0 3px var(--yr-zhi-hi);
  border-radius: 2px;
  transform: rotate(-4deg);
  margin-top: .05rem;
}

.yr-scene {
  grid-column: mid / hero-e;
  grid-row: 1;
  align-self: center;
  margin: 2.6rem 0 2rem;
  padding: .7rem;
  background: var(--yr-zhi-hi);
  border: 1px solid var(--yr-jie);
  box-shadow: 0 1px 0 rgba(255,255,255,.7) inset, 0 22px 40px -30px rgba(70, 45, 20, .55);
  position: relative;
}
.yr-scene::after {
  /* 裱邊細線 */
  content: ""; position: absolute; inset: .35rem;
  border: 1px solid rgba(34,34,34,.12);
  pointer-events: none;
}
.yr-scene img { display: block; width: 100%; height: auto; }

/* ───── 手卷目錄 ───── */
.yr-index {
  grid-column: hero-s / hero-e;
  grid-row: 2;
  justify-self: center;
  max-width: 100%;
  position: relative;
  margin: 1.4rem 0 1.2rem;
  padding: 0 1.15rem;
}
.yr-index::before, .yr-index::after {
  /* 卷軸兩端的軸桿 */
  content: "";
  position: absolute; top: -.75rem; bottom: -.75rem;
  width: .95rem;
  border-radius: .2rem;
  background:
    linear-gradient(#efe6d2, #efe6d2) center top / 100% .55rem no-repeat,
    linear-gradient(#efe6d2, #efe6d2) center bottom / 100% .55rem no-repeat,
    linear-gradient(90deg, #3d2618 0%, #7b5136 38%, #9a6a48 50%, #6b432b 70%, #34200f 100%);
  box-shadow: 0 6px 12px -6px rgba(40, 25, 10, .5);
  z-index: 2;
}
.yr-index::before { left: 0; }
.yr-index::after { right: 0; }
.yr-index-roll {
  writing-mode: vertical-rl;
  height: 19.5rem;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.5rem 1.6rem;
  background-color: var(--yr-zhi-hi);
  background-image: var(--yr-paper-grain);
  border-top: 3px double rgba(184, 50, 42, .55);
  border-bottom: 3px double rgba(184, 50, 42, .55);
  box-shadow: 0 18px 30px -26px rgba(60, 40, 20, .6);
  scrollbar-width: thin;
  scrollbar-color: var(--yr-jie) transparent;
}
.yr-index-head {
  margin: 0 0 0 1.4rem;
  flex: none;
  padding: .7rem .42rem;
  font-size: 1.05rem; font-weight: 900; letter-spacing: .5em;
  line-height: 1;
  color: var(--yr-zhi-hi);
  background: var(--yr-zhu);
  box-shadow: inset 0 0 0 3px var(--yr-zhu), inset 0 0 0 4px var(--yr-zhi-hi);
  border-radius: 2px;
}
.yr-index-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  align-self: stretch;
  counter-reset: idx;
}
.yr-juan {
  counter-increment: idx;
  flex: none;
  padding: 0 .9rem;
  border-left: 1px solid var(--yr-jie-zhu);
}
.yr-juan:first-child { border-right: 1px solid var(--yr-jie-zhu); }
.yr-juan a {
  display: block;
  height: 100%;
  font-size: .95rem; line-height: 1.75; letter-spacing: .14em;
  color: var(--yr-mo-2);
  text-decoration: none;
}
.yr-juan a::before {
  content: counter(idx, trad-chinese-formal);
  display: inline-block;
  margin-block-end: .7em;
  padding: .3em .14em;
  font-size: .82rem; font-weight: 900; letter-spacing: 0;
  line-height: 1.2;
  color: var(--yr-zhu);
  border: 1px solid var(--yr-zhu);
  border-radius: 1px;
}
.yr-juan a:hover { color: var(--yr-mo); }
.yr-juan a:hover::before, .yr-juan.is-on a::before {
  color: var(--yr-zhi-hi); background: var(--yr-zhu);
}
.yr-juan.is-on a { color: var(--yr-zhu); }

/* ───── 正文各卷 ───── */
.yr-folio > section[id] {
  counter-increment: juan;
  grid-column: wide-s / body-e;
  display: grid;
  grid-template-columns: var(--yr-gutter) minmax(0, 1fr);
  align-content: start;
  padding-top: 3.2rem;
  scroll-margin-top: 1rem;
}
.yr-folio > section[id] > * { grid-column: 2; margin: 0; }
.yr-folio > section[id] > * + * { margin-top: 1.2rem; }

/* 豎排小字:隨閱讀停在左側 */
.yr-folio > section[id]::before {
  content: "卷" counter(juan, trad-chinese-formal);
  grid-column: 1;
  grid-row: 1 / span 90;
  align-self: start;
  justify-self: end;
  position: sticky;
  top: 1.6rem;
  margin: 5.1rem 1.6rem 0 0;
  writing-mode: vertical-rl;
  font-size: .8rem; letter-spacing: .32em; line-height: 1.5;
  color: var(--yr-zhu);
  padding: .1rem 0 .1rem .55rem;
  border-left: 1px solid var(--yr-jie-zhu);
  max-height: calc(100vh - 4rem);
  overflow: hidden;
}
.yr-folio > section[data-yr-label]::before {
  content: "卷" counter(juan, trad-chinese-formal) "\3000" attr(data-yr-label);
}

.yr-folio h2 {
  font-size: clamp(1.42rem, 1.05rem + 1vw, 1.82rem);
  line-height: 1.5;
  font-weight: 600;
  letter-spacing: .035em;
  text-wrap: pretty;
}
.yr-folio h2::before {
  /* 水墨細線 */
  content: "";
  display: block;
  height: 18px;
  margin-bottom: 2.6rem;
  background: var(--yr-brush) center / 100% 100% no-repeat;
}
.yr-folio section > h3 {
  margin-top: 2.5rem;
  font-size: 1.2rem; font-weight: 600; line-height: 1.55;
  letter-spacing: .05em;
  display: flex; align-items: baseline; gap: .7rem;
}
.yr-folio section > h3::before {
  content: "";
  flex: none;
  width: .5rem; height: .5rem;
  background: var(--yr-zhu);
  transform: translateY(-.12em) rotate(45deg);
}
.yr-folio section > p, .yr-folio li > p, .yr-folio dd { font-size: 1.0625rem; }
.yr-folio strong { font-weight: 600; color: var(--yr-mo); }

/* 表格:三線表 */
.yr-folio table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem; line-height: 1.75;
  border-top: 2px solid var(--yr-mo);
  border-bottom: 2px solid var(--yr-mo);
  margin-top: 1.6rem !important;
}
.yr-folio thead th {
  text-align: left; font-weight: 600;
  color: var(--yr-zhu);
  font-size: .88rem; letter-spacing: .12em;
  padding: .75rem .8rem .65rem;
  border-bottom: 1px solid var(--yr-mo);
}
.yr-folio td {
  vertical-align: top;
  padding: .85rem .8rem;
  border-bottom: 1px solid var(--yr-jie);
}
.yr-folio tbody tr:last-child td { border-bottom: 0; }
.yr-folio td:first-child { font-weight: 600; width: 22%; }

/* 定義清單 */
.yr-folio dl {
  display: grid;
  grid-template-columns: 6.2rem minmax(0, 1fr);
  border-top: 1px solid var(--yr-jie);
}
.yr-folio dt, .yr-folio dd {
  margin: 0;
  padding: 1rem 0;
  border-bottom: 1px solid var(--yr-jie);
}
.yr-folio dt {
  color: var(--yr-zhu); font-weight: 600; letter-spacing: .14em;
  font-size: .95rem;
}

/* 步驟:朱紅印章 */
.yr-folio ol[data-part="steps"] {
  list-style: none;
  padding: 0;
  counter-reset: bu;
  margin-top: 2.2rem;
}
ol[data-part="steps"] > li {
  counter-increment: bu;
  position: relative;
  padding: 0 0 2.2rem 4.4rem;
}
ol[data-part="steps"] > li:last-child { padding-bottom: .4rem; }
ol[data-part="steps"] > li::before {
  content: counter(bu, trad-chinese-informal);
  position: absolute; left: 0; top: .05rem;
  width: 2.85rem; height: 2.85rem;
  display: grid; place-items: center;
  font-size: 1.28rem; font-weight: 900; line-height: 1; letter-spacing: 0;
  color: var(--yr-zhi-hi);
  background-color: var(--yr-zhu);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(251,247,238,.5) 0 .6px, transparent 1.4px),
    radial-gradient(circle at 76% 70%, rgba(251,247,238,.45) 0 .8px, transparent 1.6px),
    radial-gradient(circle at 62% 14%, rgba(251,247,238,.35) 0 .5px, transparent 1.2px),
    radial-gradient(circle at 30% 84%, rgba(120,20,15,.5) 0 1.2px, transparent 2.4px);
  box-shadow: inset 0 0 0 3px var(--yr-zhu), inset 0 0 0 4.5px var(--yr-zhi-hi), 0 1px 0 rgba(120, 25, 20, .2);
  border-radius: 3px 5px 2px 4px;
  transform: rotate(-2.5deg);
}
ol[data-part="steps"] > li:nth-child(3n+2)::before { transform: rotate(1.8deg); border-radius: 4px 2px 5px 3px; }
ol[data-part="steps"] > li:nth-child(3n)::before { transform: rotate(-.8deg); border-radius: 2px 4px 3px 5px; }
ol[data-part="steps"] > li::after {
  content: "";
  position: absolute; left: 1.42rem; top: 3.5rem; bottom: .6rem;
  width: 1px;
  background: linear-gradient(rgba(34,34,34,.45), rgba(34,34,34,.12) 70%, transparent);
}
ol[data-part="steps"] > li:last-child::after { display: none; }
ol[data-part="steps"] > li > * { margin: 0; }
ol[data-part="steps"] > li > * + * { margin-top: 1rem; }
ol[data-part="steps"] > li > p:first-child { padding-top: .25rem; }

/* 截圖:裝裱 */
.yr-folio figure[data-part="shot"] {
  counter-increment: tu;
  margin: 1.6rem 0 0;
  padding: .8rem .8rem .75rem;
  background: var(--yr-zhi-hi);
  border: 1px solid var(--yr-jie);
  box-shadow: 0 16px 28px -24px rgba(60, 40, 20, .55);
}
figure[data-part="shot"] img {
  display: block;
  margin: 0 auto;
  border: 1px solid rgba(34,34,34,.14);
}
figure[data-part="shot"] img[src*="-mobile"] { max-width: min(100%, 20rem); }
figure[data-part="shot"] figcaption {
  margin-top: .75rem;
  font-size: .86rem; line-height: 1.7;
  color: var(--yr-mo-3);
  letter-spacing: .03em;
}
figure[data-part="shot"] figcaption::before {
  content: "圖" counter(tu, trad-chinese-informal);
  display: inline-block;
  margin-right: .6em;
  padding: 0 .35em;
  font-size: .78rem; font-weight: 600; letter-spacing: .12em;
  color: var(--yr-zhu);
  border: 1px solid var(--yr-jie-zhu);
  line-height: 1.6;
  vertical-align: .08em;
}

/* 按語 / 警示 */
.yr-folio [data-part="note"], .yr-folio [data-part="warn"] {
  position: relative;
  padding: 1.25rem 1.35rem 1.25rem 4.3rem;
  margin-top: 1.8rem !important;
}
.yr-folio [data-part="note"] > p, .yr-folio [data-part="warn"] > p { margin: 0; font-size: 1rem; line-height: 1.85; }
.yr-folio [data-part="note"] {
  background: rgba(34, 34, 34, .035);
  border-top: 1px solid rgba(34,34,34,.22);
  border-bottom: 1px solid rgba(34,34,34,.22);
}
.yr-folio [data-part="warn"] {
  background: rgba(184, 50, 42, .055);
  border-top: 1px solid var(--yr-jie-zhu);
  border-bottom: 1px solid var(--yr-jie-zhu);
}
.yr-folio [data-part="note"]::before, .yr-folio [data-part="warn"]::before {
  position: absolute; left: 1.3rem; top: 1.4rem;
  width: 2.05rem; height: 2.05rem;
  display: grid; place-items: center;
  font-size: .98rem; font-weight: 900; line-height: 1;
  border-radius: 2px;
}
.yr-folio [data-part="note"]::before {
  content: "按";
  color: var(--yr-mo);
  border: 1.5px solid var(--yr-mo);
}
.yr-folio [data-part="warn"]::before {
  content: "慎";
  color: var(--yr-zhi-hi);
  background: var(--yr-zhu);
  box-shadow: inset 0 0 0 2px var(--yr-zhu), inset 0 0 0 3px var(--yr-zhi-hi);
  transform: rotate(-3deg);
}
.yr-folio [data-part="warn"] strong { color: var(--yr-zhu-dk); }

/* ───── 推薦碼箋 ───── */
.yr-folio > aside[data-part="cta"] {
  margin: 3.6rem 0 .6rem;
  padding: 2rem 2.2rem 1.7rem;
  position: relative;
  background-color: var(--yr-zhi-hi);
  /* 朱絲欄 */
  background-image: repeating-linear-gradient(90deg, transparent 0 2.6rem, rgba(184, 50, 42, .075) 2.6rem calc(2.6rem + 1px));
  border: 2px solid var(--yr-mo);
  box-shadow: inset 0 0 0 5px var(--yr-zhi-hi), inset 0 0 0 6px rgba(184, 50, 42, .6), 0 26px 40px -34px rgba(60, 35, 15, .7);
}
aside[data-part="cta"] > p { margin: 0; }
aside[data-part="cta"] > p:first-child {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: .35rem 1.1rem;
  font-size: .95rem; letter-spacing: .3em;
  color: var(--yr-mo-2);
}
aside[data-part="cta"] > p:first-child strong {
  font-size: clamp(2.2rem, 1.6rem + 2.4vw, 3.1rem);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: .14em;
  color: var(--yr-mo);
  font-variant-numeric: lining-nums;
  padding: .2rem .7rem .25rem .8rem;
  border-bottom: 3px solid var(--yr-zhu);
}
aside[data-part="cta"] > p:nth-child(2) {
  margin-top: 1rem;
  font-size: 1rem; line-height: 1.85;
}
aside[data-part="cta"] > a[data-cta] {
  display: inline-flex; align-items: center; gap: .9rem;
  margin-top: 1.35rem;
  padding: .95rem 1.7rem .95rem 1.9rem;
  font-size: 1.08rem; font-weight: 600; letter-spacing: .22em;
  color: var(--yr-zhi-hi);
  background: var(--yr-mo);
  text-decoration: none;
  border-radius: 2px;
  box-shadow: 0 0 0 1px var(--yr-mo), 0 0 0 4px var(--yr-zhi-hi), 0 0 0 5px rgba(34,34,34,.35);
  transition: background-color .2s, box-shadow .2s;
}
aside[data-part="cta"] > a[data-cta]::after {
  content: "";
  width: 1.5rem; height: 1px;
  background: currentColor;
}
aside[data-part="cta"] > a[data-cta]:hover {
  color: var(--yr-zhi-hi);
  background: var(--yr-zhu);
  box-shadow: 0 0 0 1px var(--yr-zhu), 0 0 0 4px var(--yr-zhi-hi), 0 0 0 5px var(--yr-jie-zhu);
}
aside[data-part="cta"] > p:last-child {
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px dashed rgba(34,34,34,.3);
  font-size: .96rem; line-height: 1.85;
  color: var(--yr-mo-2);
}
aside[data-part="cta"] > p:last-child a { color: var(--yr-zhu-dk); text-decoration-color: currentColor; }

.yr-copy {
  appearance: none;
  font: inherit;
  font-size: .92rem; font-weight: 600; letter-spacing: .16em;
  padding: .55rem 1rem .55rem 1.15rem;
  color: var(--yr-zhu);
  background: transparent;
  border: 1.5px solid var(--yr-zhu);
  border-radius: 2px;
  cursor: pointer;
  transition: background-color .2s, color .2s;
}
.yr-copy:hover { background: rgba(184, 50, 42, .08); }
.yr-copy.is-done { color: var(--yr-zhi-hi); background: var(--yr-zhu); }

/* ───── 常見問題 ───── */
#faq details {
  border-bottom: 1px solid var(--yr-jie);
}
#faq h2 + details { border-top: 1px solid var(--yr-mo); margin-top: 1.6rem; }
#faq details + details { margin-top: 0; }
#faq summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 1.15rem 2.6rem 1.15rem 2.75rem;
  font-weight: 600; font-size: 1.06rem; line-height: 1.7;
  letter-spacing: .03em;
}
#faq summary::-webkit-details-marker { display: none; }
#faq summary::before {
  content: "問";
  position: absolute; left: 0; top: 1.3rem;
  width: 1.75rem; height: 1.75rem;
  display: grid; place-items: center;
  font-size: .84rem; font-weight: 900; line-height: 1;
  color: var(--yr-zhu);
  border: 1px solid var(--yr-zhu);
  border-radius: 1px;
}
#faq summary::after {
  content: "";
  position: absolute; right: .35rem; top: 1.6rem;
  width: .95rem; height: .95rem;
  background:
    linear-gradient(var(--yr-mo), var(--yr-mo)) center / 100% 1.5px no-repeat,
    linear-gradient(var(--yr-mo), var(--yr-mo)) center / 1.5px 100% no-repeat;
  transition: transform .25s;
}
#faq details[open] summary::after { transform: rotate(135deg); }
#faq details[open] summary::before { color: var(--yr-zhi-hi); background: var(--yr-zhu); }
#faq summary:hover { color: var(--yr-zhu); }
#faq details > p {
  position: relative;
  margin: 0;
  padding: 0 .4rem 1.35rem 2.75rem;
  color: var(--yr-mo-2);
}
#faq details > p::before {
  content: "答";
  position: absolute; left: 0; top: .2rem;
  width: 1.75rem; height: 1.75rem;
  display: grid; place-items: center;
  font-size: .84rem; font-weight: 900; line-height: 1;
  color: var(--yr-mo-2);
  border: 1px solid rgba(34,34,34,.35);
}

/* ───── 浮動的目錄印 ───── */
.yr-mark {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  z-index: 20;
  writing-mode: vertical-rl;
  padding: .75rem .5rem;
  font-size: .9rem; font-weight: 900; letter-spacing: .4em; line-height: 1;
  color: var(--yr-zhi-hi);
  background: var(--yr-zhu);
  text-decoration: none;
  border-radius: 2px;
  box-shadow: inset 0 0 0 3px var(--yr-zhu), inset 0 0 0 4px var(--yr-zhi-hi), 0 8px 18px -8px rgba(90, 20, 15, .55);
  transition: opacity .3s, transform .3s;
}
.yr-mark:hover { color: var(--yr-zhi-hi); background: var(--yr-zhu-dk); box-shadow: inset 0 0 0 3px var(--yr-zhu-dk), inset 0 0 0 4px var(--yr-zhi-hi), 0 8px 18px -8px rgba(90, 20, 15, .55); }
.yr-js .yr-mark { opacity: 0; transform: translateY(.6rem); pointer-events: none; }
.yr-js .yr-mark.is-up { opacity: 1; transform: none; pointer-events: auto; }

/* ───── 牌記(頁尾) ───── */
.yr-colophon {
  padding: 3.5rem 1.125rem 3rem;
  background: var(--yr-zhi-lo);
  border-top: 1px solid var(--yr-jie);
}
.yr-colophon-box {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.8rem 1.6rem 1.5rem;
  text-align: center;
  border: 2px solid var(--yr-mo);
  box-shadow: inset 0 0 0 4px var(--yr-zhi-lo), inset 0 0 0 5px var(--yr-mo);
  font-size: .92rem; line-height: 1.8;
  color: var(--yr-mo-2);
}
.yr-colophon-box p { margin: 0; }
.yr-colophon-name {
  display: inline-flex; align-items: center; gap: .55rem;
  font-size: 1.1rem; font-weight: 600; letter-spacing: .16em;
  color: var(--yr-mo);
}
.yr-colophon-name svg { color: var(--yr-zhu); }
.yr-colophon-links {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: .2rem 0;
  margin: 1rem 0 .8rem;
}
.yr-colophon-links a {
  padding: 0 .95rem;
  letter-spacing: .12em;
  text-decoration: none;
  position: relative;
}
.yr-colophon-links a + a::before {
  content: ""; position: absolute; left: 0; top: 30%; bottom: 30%;
  width: 1px; background: var(--yr-jie);
}
.yr-colophon-risk {
  margin-top: .8rem !important;
  padding-top: .8rem;
  border-top: 1px solid var(--yr-jie);
  color: var(--yr-mo);
}
.yr-colophon-copy { margin-top: .5rem !important; font-size: .84rem; letter-spacing: .08em; color: var(--yr-mo-3); }

/* ───── 站務頁 ───── */
.yr-leaf {
  max-width: 54rem;
  margin: 0 auto;
  padding: 3.6rem 1.125rem 5rem;
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
}
.yr-leaf::before {
  grid-column: 1;
  align-self: start;
  justify-self: end;
  position: sticky; top: 2rem;
  margin: .9rem 1.6rem 0 0;
  writing-mode: vertical-rl;
  font-size: .8rem; letter-spacing: .36em;
  color: var(--yr-zhu);
  padding-left: .55rem;
  border-left: 1px solid var(--yr-jie-zhu);
  content: "Coinyara";
}
.yr-leaf[data-page="about"]::before { content: "站務\3000關於本站"; }
.yr-leaf[data-page="contact"]::before { content: "站務\3000聯絡我們"; }
.yr-leaf[data-page="privacy"]::before { content: "站務\3000隱私權政策"; }
.yr-leaf[data-page="disclosure"]::before { content: "站務\3000推廣披露"; }
.yr-leaf-text { grid-column: 2; min-width: 0; max-width: 40rem; }
.yr-leaf-text > * { margin: 0; }
.yr-leaf-text > * + * { margin-top: 1.15rem; }
.yr-leaf-text h1 {
  font-size: clamp(1.8rem, 1.3rem + 1.4vw, 2.3rem);
  font-weight: 600; line-height: 1.4; letter-spacing: .06em;
  padding-bottom: 1.2rem;
  background:
    linear-gradient(var(--yr-mo), var(--yr-mo)) left bottom / 100% 1px no-repeat,
    linear-gradient(var(--yr-mo), var(--yr-mo)) left calc(100% - 4px) / 100% 2.5px no-repeat;
  margin-bottom: 2rem;
}
.yr-leaf-text h2 {
  margin-top: 2.6rem;
  font-size: 1.32rem; font-weight: 600; line-height: 1.55; letter-spacing: .05em;
  display: flex; align-items: baseline; gap: .7rem;
}
.yr-leaf-text h2::before {
  content: ""; flex: none;
  width: .5rem; height: .5rem;
  background: var(--yr-zhu);
  transform: translateY(-.12em) rotate(45deg);
}
.yr-leaf-text dl { border-top: 1px solid var(--yr-jie); }
.yr-leaf-text dt { margin-top: 1rem; font-weight: 600; color: var(--yr-zhu); letter-spacing: .08em; }
.yr-leaf-text dd { margin: .3rem 0 0; padding-bottom: 1rem; border-bottom: 1px solid var(--yr-jie); }

/* 404 */
.yr-lost {
  max-width: 40rem;
  margin: 0 auto;
  padding: 5rem 1.25rem 6rem;
  text-align: center;
}
.yr-lost-seal {
  display: inline-grid; place-items: center;
  width: 6.4rem; height: 6.4rem;
  font-size: 2.2rem; font-weight: 900; line-height: 1.05;
  writing-mode: vertical-rl;
  letter-spacing: .1em;
  color: var(--yr-zhi-hi);
  background: var(--yr-zhu);
  box-shadow: inset 0 0 0 5px var(--yr-zhu), inset 0 0 0 7px var(--yr-zhi-hi);
  border-radius: 4px 6px 3px 5px;
  transform: rotate(-4deg);
}
.yr-lost h1 { margin: 2.2rem 0 0; font-size: 1.9rem; font-weight: 600; letter-spacing: .08em; }
.yr-lost p { margin: 1rem 0 0; color: var(--yr-mo-2); }
.yr-lost-code { font-size: .9rem; letter-spacing: .3em; color: var(--yr-mo-3); }
.yr-lost-home {
  display: inline-block;
  margin-top: 2rem !important;
  padding: .8rem 1.6rem;
  color: var(--yr-zhi-hi) !important;
  background: var(--yr-mo);
  text-decoration: none;
  letter-spacing: .2em;
}
.yr-lost-home:hover { background: var(--yr-zhu); }

/* ───── 窄螢幕 ───── */
@media (max-width: 64rem) {
  .yr-folio {
    grid-template-columns:
      [bleed-s] minmax(1.125rem, 1fr)
      [hero-s wide-s] 3.2rem
      [body-s] minmax(0, 9rem)
      [mid] minmax(0, 29rem)
      [body-e] 1rem
      [wide-e hero-e] minmax(1.125rem, 1fr)
      [bleed-e];
    --yr-gutter: 3.2rem;
  }
  .yr-folio > header[data-part="hero"] { grid-column: hero-s / hero-e; padding: 2.6rem 0 0; }
  .yr-scene { grid-column: hero-s / hero-e; grid-row: 2; margin: 1.8rem 0 .6rem; }
  .yr-index { grid-row: 3; }
  .yr-folio > section[id]::before { margin-right: 1rem; letter-spacing: .26em; }
}

@media (max-width: 47.5rem) {
  body { font-size: 1rem; line-height: 1.85; }
  .yr-top-in { padding: .9rem 0 .85rem; }
  .yr-brand-word { font-size: 1.12rem; letter-spacing: .1em; }
  .yr-brand-seal { width: 28px; height: 28px; }
  .yr-nav a { padding: .25rem .6rem; font-size: .95rem; letter-spacing: .2em; text-indent: .2em; }
  .yr-nav a:last-child { padding-right: 0; }

  .yr-folio {
    grid-template-columns: [bleed-s hero-s wide-s body-s mid] minmax(0, 1fr) [body-e wide-e hero-e bleed-e];
    padding: 0 1.125rem 4rem;
  }
  .yr-folio > header[data-part="hero"] {
    display: block;
    padding-top: 1.7rem;
  }
  header[data-part="hero"] > [data-part="kicker"] {
    writing-mode: horizontal-tb;
    border-right: 0;
    padding: 0 0 0 .7rem;
    border-left: 3px solid var(--yr-zhu);
    letter-spacing: .2em;
    font-size: .82rem;
    margin-bottom: .8rem;
  }
  header[data-part="hero"] h1 { font-size: 1.68rem; line-height: 1.42; letter-spacing: .02em; }
  header[data-part="hero"] [data-part="dek"] { margin-top: 1rem; font-size: .97rem; line-height: 1.85; }
  header[data-part="hero"] [data-part="meta"] { margin-top: 1rem; font-size: .84rem; }
  .yr-scene { margin: 1.4rem 0 .4rem; padding: .45rem; }
  .yr-scene::after { inset: .22rem; }

  .yr-index { margin: 1.6rem 0 .6rem; padding: 0 .8rem; justify-self: stretch; }
  .yr-index::before, .yr-index::after { width: .75rem; }
  .yr-index-roll { height: 17.5rem; padding: 1.2rem 1.1rem; }
  .yr-juan { padding: 0 .7rem; }
  .yr-juan a { font-size: .9rem; letter-spacing: .1em; }
  .yr-index-head { margin-left: 1rem; }

  .yr-folio > section[id] {
    display: block;
    padding-top: 2.7rem;
    background: var(--yr-brush) center 1rem / 100% 14px no-repeat;
  }
  .yr-folio > section[id]::before,
  .yr-folio > section[data-yr-label]::before {
    content: "卷" counter(juan, trad-chinese-formal);
    position: static;
    display: block;
    writing-mode: horizontal-tb;
    margin: 0 0 .5rem;
    padding: 0;
    border: 0;
    font-size: .8rem; letter-spacing: .4em;
    text-align: left;
    justify-self: start;
    max-height: none;
  }
  .yr-folio h2::before { display: none; }
  .yr-folio section > h3 { margin-top: 2rem; font-size: 1.12rem; }
  .yr-folio section > p, .yr-folio li > p, .yr-folio dd { font-size: 1rem; }

  .yr-folio table { display: block; overflow-x: auto; font-size: .88rem; }
  .yr-folio td, .yr-folio thead th { padding: .7rem .55rem; min-width: 6.5rem; }
  .yr-folio dl { grid-template-columns: 4.4rem minmax(0, 1fr); }

  ol[data-part="steps"] > li { padding-left: 3.3rem; }
  ol[data-part="steps"] > li::before { width: 2.3rem; height: 2.3rem; font-size: 1.05rem; }
  ol[data-part="steps"] > li::after { left: 1.15rem; top: 2.9rem; }
  .yr-folio figure[data-part="shot"] { padding: .5rem .5rem .55rem; }
  ol[data-part="steps"] > li > figure[data-part="shot"] { margin-left: -3.3rem; position: relative; z-index: 1; }

  .yr-folio [data-part="note"], .yr-folio [data-part="warn"] { padding: 1.05rem 1rem 1.05rem 3.4rem; }
  .yr-folio [data-part="note"]::before, .yr-folio [data-part="warn"]::before { left: .9rem; top: 1.15rem; width: 1.8rem; height: 1.8rem; font-size: .9rem; }

  .yr-folio > aside[data-part="cta"] { padding: 1.5rem 1.2rem 1.35rem; margin-top: 2.8rem; }
  aside[data-part="cta"] > p:first-child { letter-spacing: .2em; }
  aside[data-part="cta"] > p:first-child strong { padding-left: .2rem; padding-right: .2rem; }
  aside[data-part="cta"] > a[data-cta] { display: flex; justify-content: center; padding: .95rem 1rem; }

  #faq summary { padding-left: 2.5rem; padding-right: 2rem; font-size: 1rem; }
  #faq details > p { padding-left: 2.5rem; }

  .yr-leaf { display: block; padding-top: 2.2rem; }
  .yr-leaf::before { display: none; }
  .yr-colophon { padding: 2.6rem 1.125rem 5.5rem; }
  .yr-colophon-box { padding: 1.5rem 1rem 1.3rem; }
  .yr-colophon-links a { padding: 0 .6rem; }
}

@media print {
  .yr-index, .yr-mark, .yr-nav, .yr-copy { display: none !important; }
  body { background: #fff; }
}