/* 書籍專頁（《設計永續》）。版型沿用 pages.css 的 .blk；本檔只放專頁特有的部分。 */
@font-face { font-family: SweiHM; src: url(../fonts/swei2-Light.woff2) format('woff2'); font-weight: 300; font-display: swap; }
@font-face { font-family: SweiHM; src: url(../fonts/swei2-Regular.woff2) format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: SweiHM; src: url(../fonts/swei2-Bold.woff2) format('woff2'); font-weight: 700; font-display: swap; }

/* 開頭 */
.bk-hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); border-bottom: 1px solid var(--rule); }
.bk-hero .art { padding: clamp(36px, 4vw, 64px) var(--gutter); border-right: 1px solid var(--hair); display: grid; place-items: center; background: var(--paper-2); }
.bk-hero .art img { width: min(80%, 340px); height: auto; filter: drop-shadow(0 18px 24px rgba(0,0,0,.18)); }
.bk-hero .txt { padding: clamp(36px, 4.6vw, 72px) var(--gutter); display: flex; flex-direction: column; gap: 18px; justify-content: center; }
.bk-hero h1 { margin: 4px 0 0; font-size: clamp(44px, 5vw, 72px); font-weight: 700; letter-spacing: .08em; line-height: 1.1; }
.bk-hero .subt { margin: 0; font-size: clamp(18px, 1.6vw, 22px); font-weight: 500; }
.bk-hero .by { margin: 0; font-size: 15px; color: var(--ink-2); }
.bk-hero .by a { color: inherit; text-decoration-color: var(--orange); text-underline-offset: 3px; }
.quotes { display: grid; gap: 18px; margin: 6px 0 2px; }
.quotes blockquote { padding-left: 18px; border-left: 3px solid var(--orange); }
.quotes blockquote { margin: 0; }
.quotes p { margin: 0; font-size: 16px; line-height: 1.8; }
.quotes footer { margin-top: 4px; font-size: 13px; color: var(--ink-2); }
.buy { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; }
.buy .btn { padding: 11px 14px 11px 16px; }
.buy .btn small { font-weight: 400; opacity: .8; margin-left: 2px; }
.buy .textlink { font-size: 14px; }

/* 錨點列 */
.anchors { position: sticky; top: var(--hdr, 72px); z-index: 20; display: flex; gap: 6px 26px; flex-wrap: wrap; padding: 13px var(--gutter); background: var(--paper); border-bottom: 1px solid var(--rule); font-size: 14px; }
.anchors a { text-decoration: none; white-space: nowrap; }
.anchors a:hover { color: var(--orange); }
.bk [id] { scroll-margin-top: 50px; }

/* 書衣與照片 */
.spread { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 3vw, 40px); }
.spread figure { margin: 0; }
.spread img { display: block; width: 100%; height: auto; }
.spread img { box-shadow: 0 1px 2px rgba(0,0,0,.12), 0 18px 36px rgba(0,0,0,.16); }
.spread figcaption { margin-top: 8px; font-size: 13px; color: var(--ink-2); }
.backtext { margin-top: 22px; }
.backtext p { margin: 0 0 1em; font-size: 15px; line-height: 1.85; }
.backtext p.q { font-size: 17px; font-weight: 500; }
.credit { margin: 14px 0 0; font-size: 13px; color: var(--ink-2); }

/* 收合的長文 */
.longtext { max-width: none; }
.longtext p { margin: 0 0 1.1em; line-height: 1.95; font-size: 16px; }
.longtext details > summary, details.backtext > summary { cursor: pointer; list-style: none; display: inline-flex; gap: 8px; font-size: 14px; font-weight: 500; border-bottom: 1px solid currentColor; margin: 4px 0 6px; }
.longtext details > summary::-webkit-details-marker, details.backtext > summary::-webkit-details-marker { display: none; }
.longtext details[open] > summary, details.backtext[open] > summary { display: none; }
.fw + .fw { margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--hair); }
.fw h3 { margin: 0; font-size: 22px; font-weight: 700; }
.fw .who { margin: 6px 0 20px; font-size: 14px; color: var(--ink-2); line-height: 1.7; }
.fw .who b { color: var(--black); font-weight: 500; }
.fw .note { display: block; font-size: 12.5px; color: var(--ink-3); }

/* 論證的旅程 */
#argmap { position: relative; overflow: hidden; padding: 96px 56px 96px; border-top: 1px solid var(--rule); font-family: SweiHM, var(--sans, sans-serif); font-weight: 300; color: var(--black); }
#argmap svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
#argmap .eyebrow, #argmap > h2 { position: relative; max-width: 1000px; margin-left: auto; margin-right: auto; }
#argmap .eyebrow { font-size: 15px; margin-bottom: 14px; }
#argmap > h2 { font-family: SweiHM, sans-serif; font-weight: 700; font-size: 58px; letter-spacing: .14em; margin-top: 0; margin-bottom: 96px; line-height: 1.2; }
#argmap .route { position: relative; max-width: 1000px; margin: 0 auto; list-style: none; padding: 0; }
#argmap .st { position: absolute; top: 0; left: 0; }
#argmap .lab { font-size: 15px; letter-spacing: .16em; margin: 0; }
#argmap .lab::before { content: ""; display: inline-block; width: 7px; height: 7px; background: var(--orange); margin-right: 8px; vertical-align: .08em; }
#argmap .ttl { font-weight: 400; font-size: 32px; letter-spacing: .14em; line-height: 1.45; margin: 6px 0 0; }
#argmap .sub { font-size: 23px; font-weight: 400; letter-spacing: .06em; margin: 2px 0 0; }
#argmap ul { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 4px; }
#argmap ul li { font-size: 22px; letter-spacing: .06em; line-height: 1.5; padding-left: 18px; position: relative; }
#argmap ul li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 1px; background: var(--black); }
#argmap .mobile-map { display: none; }

/* 特別之處 */
.features { counter-reset: f; display: grid; gap: 28px; max-width: none; }
.features section { counter-increment: f; display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 0 14px; }
.features section::before { content: counter(f, decimal-leading-zero); font-size: 13px; color: var(--orange); font-weight: 500; padding-top: 6px; font-variant-numeric: tabular-nums; }
.features h3 { margin: 0 0 6px; font-size: 20px; font-weight: 700; }
.features p { margin: 0; line-height: 1.9; }
.features-lede { max-width: none; margin: 0 0 32px; font-size: 17px; line-height: 1.85; }
.features-close { max-width: none; margin: 36px 0 0; padding: 22px 24px; background: var(--paper-2); line-height: 1.9; }
.invite { margin: 26px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.invite li { line-height: 1.8; }

/* 書籍資料 */
.specs { display: grid; grid-template-columns: 7em minmax(0, 1fr); gap: 10px 18px; margin: 0; }
.specs dt { color: var(--ink-2); font-size: 14px; }
.specs dd { margin: 0; }

@media (max-width: 1080px) {
  .bk-hero { grid-template-columns: 1fr; }
  .bk-hero .art { border-right: 0; border-bottom: 1px solid var(--hair); }
  .bk-hero .art img { width: min(52%, 260px); }
}
@media (max-width: 760px) {
  .anchors { overflow-x: auto; flex-wrap: nowrap; gap: 20px; }
  .spread { grid-template-columns: 1fr; }
  #argmap { padding: 44px var(--gutter) 40px; }
  #argmap > h2 { font-size: 34px; margin-bottom: 20px; }
  #argmap svg, #argmap .route { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  #argmap .route .st { position: static; }
  #argmap .mobile-map { display: block; margin: 0 calc(-1 * var(--gutter)); }
  #argmap .mobile-map img { display: block; width: 100%; height: auto; }
  #argmap .mobile-map figcaption { padding: 10px var(--gutter) 0; font-size: 13px; color: var(--ink-2); font-family: var(--sans, sans-serif); }
  .features section { grid-template-columns: 1fr; }
  .specs { grid-template-columns: 5.5em minmax(0, 1fr); }
}

/* 試讀與注釋 */
.ex + .ex { margin-top: 48px; padding-top: 36px; border-top: 1px solid var(--hair); }
.ex h3 { margin: 0 0 18px; font-size: 22px; font-weight: 700; }
.ex h3 small { font-size: 15px; font-weight: 400; color: var(--ink-2); }
.ex h4 { margin: 34px 0 14px; font-size: 18px; font-weight: 700; }
.ex > h4:first-of-type, .ex h3 + h4 { margin-top: 0; }
.ex .tbc { color: var(--ink-2); }
sup.fn { line-height: 0; font-size: 11px; margin: 0; }
sup.fn a { color: var(--orange); text-decoration: none; font-weight: 500; padding: 0 1px; }
sup.fn a:hover, sup.fn a:focus-visible { text-decoration: underline; }
.notes { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--rule); font-size: 14px; line-height: 1.8; }
.notes h4 { margin: 0 0 4px; font-size: 15px; }
.notes h4 + .notes-hint { margin: 0 0 12px; font-size: 13px; color: var(--ink-2); }
.notes ol { margin: 0 0 28px; padding-left: 2.2em; }
.notes ol li { margin: 0 0 8px; }
.notes li:target, .notes li.hit { background: var(--paper-2); }
.notes .back { text-decoration: none; color: var(--orange); margin-left: 2px; }
.notes .refs { list-style: none; margin: 8px 0 0; padding: 0; }
.notes .refs li { margin: 0 0 8px; padding-left: 2em; text-indent: -2em; }
.fn-pop { position: absolute; z-index: 40; max-width: 26em; padding: 12px 14px; background: var(--paper); border: 1px solid var(--rule); box-shadow: 0 8px 24px rgba(0,0,0,.12); font-size: 14px; line-height: 1.75; }
.fn-pop b { color: var(--orange); margin-right: 6px; font-weight: 500; }

/* 11/1 調整 */
.bk-hero .tt { display: inline-flex; flex-direction: column; align-self: flex-start; }
.bk-hero .tt h1 { margin-right: -.08em; }
.bk-hero .tt .subt { margin-top: 10px; text-align: justify; text-align-last: justify; }
.buy { gap: 10px 22px; }
.buy .shop { display: inline-flex; align-items: baseline; gap: 6px; }
.buy .disc { font-size: 12px; font-weight: 500; color: var(--orange); }
.spread details.backtext { margin-top: 10px; }
.fw h3 { padding-left: 14px; border-left: 3px solid var(--orange); line-height: 1.3; }
.rows.single { border-top: 0; }
.rows.single .row { border-bottom: 0; }
.bk-hero .tt h1 { text-align: justify; text-align-last: justify; }
.spread .capline { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; }
.spread .capline details.backtext { margin: 0; }
.spread .capline details.backtext > summary { font-size: 13px; font-weight: 400; margin: 0; color: var(--ink-2); }
.spread .capline details.backtext[open] { flex-basis: 100%; margin-top: 14px; color: var(--black); }

/* 書衣放大 */
.spread a.zoom { display: block; cursor: zoom-in; }
.spread a.zoom:focus-visible { outline: 2px solid var(--orange); outline-offset: 4px; }
.zoom-hint { margin: 14px 0 0; font-size: 13px; color: var(--ink-3); }
.lb { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 3vh 3vw; background: rgba(20, 20, 18, .88); cursor: zoom-out; }
.lb img { max-width: 100%; max-height: 100%; width: auto; height: auto; box-shadow: 0 20px 60px rgba(0,0,0,.4); }
.lb button { position: absolute; top: 14px; right: 16px; padding: 6px 12px; font: inherit; font-size: 14px; color: #fff; background: transparent; border: 1px solid rgba(255,255,255,.6); cursor: pointer; }
.lb button:focus-visible { outline: 2px solid var(--orange); }
html.lb-open { overflow: hidden; }

/* 引用本書 */
.cite-book { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--hair); max-width: none; }
.cite-book h3 { margin: 0 0 12px; font-size: 16px; font-weight: 700; }
.cite-book ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.cite-book li { display: grid; grid-template-columns: 5.5em minmax(0, 1fr) auto; gap: 4px 14px; align-items: baseline; }
.cite-book .fmt { font-size: 13px; color: var(--ink-2); }
.cite-book .ctext { margin: 0; font-size: 15px; line-height: 1.75; }
.cite-book .copy { font: inherit; font-size: 13px; padding: 3px 10px; color: var(--black); background: transparent; border: 1px solid var(--rule); cursor: pointer; white-space: nowrap; }
.cite-book .copy:hover, .cite-book .copy:focus-visible { border-color: var(--orange); color: var(--orange); }
@media (max-width: 760px) { .cite-book li { grid-template-columns: minmax(0, 1fr) auto; } .cite-book .fmt { grid-column: 1 / -1; } }
.cite-book h4 { margin: 18px 0 10px; font-size: 13px; font-weight: 500; color: var(--ink-2); letter-spacing: .04em; }
.cite-book h3 + h4 { margin-top: 0; }
.specs .buy-list { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.specs .buy-list .shop { display: inline-flex; align-items: baseline; gap: 6px; }
.specs .buy-list .disc { font-size: 12px; font-weight: 500; color: var(--orange); }

/* 讀書會邀請（試讀之後） */
.rg-call { margin-top: 48px; padding: 26px 28px 28px; background: var(--paper-2); border-left: 4px solid var(--orange); display: grid; gap: 12px; justify-items: start; }
.rg-call .eyebrow { font-size: 13px; }
.rg-call h3 { margin: 0; font-size: 20px; font-weight: 700; line-height: 1.5; }
.rg-call .btn { margin-top: 6px; }

/* 手機：書籍頁目錄改為可堆疊的按鈕，不固定在上方 */
@media (max-width: 760px) {
  .anchors { position: static; overflow: visible; flex-wrap: wrap; gap: 8px; padding: 16px var(--gutter); }
  .anchors a { border: 1px solid var(--black); padding: 4px 12px; font-size: 13px; font-weight: 500; }
  .anchors a:hover { background: var(--paper-2); color: var(--black); }
}