/* ══════════════════════════════════════════════════════════════════════
   CAI-TOPOLOGY · 學術方向子頁
   · 頂部題跋（編輯體）+ 底部「本方向相關文章」列表
   · 與主頁配色保持一致：古紙黃 + 朱砂
   ══════════════════════════════════════════════════════════════════════ */

:root {
  --hzs-paper-1:    #ede3d0;
  --hzs-paper-2:    #e8dcc6;
  --hzs-paper-3:    #d1bd99;
  --hzs-ink:        #23180f;
  --hzs-ink-soft:   rgba(44, 32, 20, .72);
  --hzs-ink-faint:  rgba(44, 32, 20, .68);
  --hzs-gold:       #d4af37;
  --hzs-gold-dim:   rgba(212, 175, 55, .32);
  --hzs-line:       rgba(85, 61, 34, .18);
  --hzs-line-dim:   rgba(85, 61, 34, .08);
  --hzs-cinnabar:   #a9472b;

  /* ── 每個方向自己的主圖（子頁覆蓋這些變量） ── */
  --hzs-hero-bg:    url("../images/track-record-tree-ring.webp");
}

html, body {
  background: var(--hzs-paper-2);
  color: var(--hzs-ink);
}
body.hzs-page {
  min-height: 100vh;
  font-family: "Noto Serif SC", "Noto Serif TC", "Songti SC", serif;
  letter-spacing: .02em;
  background:
    linear-gradient(180deg, var(--hzs-paper-1) 0%, var(--hzs-paper-2) 46%, var(--hzs-paper-3) 100%);
}

.hzs-wrap {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
  position: relative;
}

.hzs-kicker {
  margin: 0;
  font-family: "JetBrains Mono", "Inter", monospace;
  font-size: .62rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: rgba(139, 101, 43, .72);
}

/* ══════════════════════════════════════════════════════════════════════
   頂部題跋 · Hero
   ══════════════════════════════════════════════════════════════════════ */

.hzs-hero {
  position: relative;
  padding: calc(var(--nav-h, 92px) + 72px) 0 96px;
  isolation: isolate;
  overflow: hidden;
}
.hzs-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--hzs-hero-bg) center / cover no-repeat;
  opacity: .26;
  filter: sepia(.14) saturate(.9) contrast(1.08) brightness(.98);
  mix-blend-mode: normal;
  -webkit-mask-image: radial-gradient(ellipse 85% 70% at 50% 50%, #000 46%, transparent 92%);
          mask-image: radial-gradient(ellipse 85% 70% at 50% 50%, #000 46%, transparent 92%);
}
.hzs-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 58% 40% at 50% 28%, rgba(212, 175, 55, .12), transparent 68%),
    linear-gradient(180deg, rgba(237, 227, 208, .42) 0%, transparent 44%, rgba(209, 189, 153, .44) 100%);
}

.hzs-hero-wrap {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(220px, 320px);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--hzs-line);
}

.hzs-hero-text {
  min-width: 0;
}
.hzs-hero-no {
  font-family: "Cinzel", serif;
  font-size: .74rem;
  letter-spacing: .3em;
  color: rgba(139, 101, 43, .68);
  margin: 0 0 18px;
}
.hzs-hero-zi {
  display: inline-block;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-weight: 500;
  font-size: clamp(2.7rem, 5.2vw, 4.8rem);
  line-height: 1.08;
  letter-spacing: .12em;
  color: var(--hzs-ink);
  position: relative;
  margin: 0 0 14px;
  text-indent: .12em;
}
.hzs-hero-zi::after {
  content: "";
  position: absolute;
  right: -18px;
  top: 12px;
  width: 12px;
  height: 12px;
  background: var(--hzs-cinnabar);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .2);
}

.hzs-hero-title {
  margin: 6px 0 20px;
  font-family: "Noto Serif SC", serif;
  font-weight: 500;
  font-size: clamp(1.18rem, 1.7vw, 1.44rem);
  letter-spacing: .22em;
  color: var(--hzs-ink);
  text-indent: .22em;
}
.hzs-hero-sub {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(.98rem, 1.25vw, 1.08rem);
  line-height: 2;
  letter-spacing: .08em;
  color: var(--hzs-ink-soft);
  max-width: 44em;
}

/* 頂部題跋右側小配圖（可選） */
.hzs-hero-aside {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(237, 227, 208, .14), rgba(209, 189, 153, .1)),
    var(--hzs-hero-bg) center / cover no-repeat;
  filter: sepia(.1) saturate(.96) contrast(1.12) brightness(.98);
  mix-blend-mode: normal;
  -webkit-mask-image: radial-gradient(ellipse 92% 96% at 50% 50%, #000 66%, transparent 100%);
          mask-image: radial-gradient(ellipse 92% 96% at 50% 50%, #000 66%, transparent 100%);
}

/* ══════════════════════════════════════════════════════════════════════
   正文 · 題跋散文
   ══════════════════════════════════════════════════════════════════════ */

.hzs-body {
  padding: clamp(56px, 8vw, 96px) 0;
  position: relative;
}
.hzs-body-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
}
.hzs-body-prose {
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 2.2;
  letter-spacing: .08em;
  color: var(--hzs-ink);
  max-width: 38em;
}
.hzs-body-prose p {
  margin: 0 0 22px;
}
.hzs-body-prose p:last-child { margin-bottom: 0; }

/* 方法三箴（所觀 / 所取 / 所止） */
.hzs-precepts {
  margin: 0;
  padding: 24px 28px;
  background: rgba(255, 250, 232, .56);
  border: 1px solid var(--hzs-line);
  border-left: 3px solid var(--hzs-cinnabar);
}
.hzs-precepts dt {
  display: inline-block;
  width: 3em;
  font-family: "Noto Serif SC", serif;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--hzs-ink);
  margin-right: 14px;
}
.hzs-precepts dd {
  display: inline;
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: .98rem;
  line-height: 1.95;
  letter-spacing: .06em;
  color: var(--hzs-ink-soft);
}
.hzs-precepts .row {
  padding: 8px 0;
  border-bottom: 1px dashed rgba(85, 61, 34, .22);
}
.hzs-precepts .row:last-child { border-bottom: 0; }

/* 尾聲小字 */
.hzs-coda {
  margin-top: clamp(40px, 5vw, 60px);
  padding-top: 24px;
  border-top: 1px dashed var(--hzs-line);
  text-align: center;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 2.1;
  letter-spacing: .14em;
  color: var(--hzs-ink-soft);
}

/* ══════════════════════════════════════════════════════════════════════
   本方向相關文章 · 文章列表
   ══════════════════════════════════════════════════════════════════════ */

.hzs-articles {
  position: relative;
  padding: clamp(60px, 9vw, 100px) 0 clamp(80px, 12vw, 120px);
  background: rgba(255, 250, 232, .38);
  border-top: 1px solid var(--hzs-line);
  border-bottom: 1px solid var(--hzs-line);
}
.hzs-articles-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: clamp(28px, 4vw, 44px);
  padding-bottom: 16px;
  border-bottom: 1px dotted rgba(212, 175, 55, .5);
}
.hzs-articles-head h2 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 500;
  letter-spacing: .24em;
  color: var(--hzs-ink);
}
.hzs-articles-head .hzs-articles-count {
  font-family: "JetBrains Mono", monospace;
  font-size: .66rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: rgba(139, 101, 43, .7);
}

.hzs-articles-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.hzs-article-item {
  position: relative;
}
.hzs-article-link {
  display: grid;
  grid-template-columns: 4em minmax(0, 1fr) auto;
  gap: clamp(16px, 3vw, 36px);
  align-items: baseline;
  padding: 22px 8px;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--hzs-line-dim);
  transition: background .3s ease, border-color .3s ease;
}
.hzs-article-link:hover {
  background: rgba(255, 250, 232, .66);
  border-bottom-color: rgba(212, 175, 55, .44);
}
.hzs-article-no {
  font-family: "Cinzel", serif;
  font-size: .72rem;
  letter-spacing: .3em;
  color: rgba(139, 101, 43, .56);
  white-space: nowrap;
}
.hzs-article-main { min-width: 0; }
.hzs-article-title {
  margin: 0 0 6px;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.04rem, 1.5vw, 1.18rem);
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--hzs-ink);
  line-height: 1.5;
}
.hzs-article-excerpt {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: .94rem;
  line-height: 1.9;
  letter-spacing: .02em;
  color: var(--hzs-ink-soft);
  max-width: 52em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.hzs-article-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  white-space: nowrap;
  font-family: "JetBrains Mono", monospace;
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(139, 101, 43, .7);
}
.hzs-article-cat {
  color: rgba(169, 71, 43, .82);
}

.hzs-article-empty {
  padding: 42px 8px;
  text-align: center;
  font-family: "Noto Serif SC", serif;
  color: var(--hzs-ink-faint);
  font-size: .96rem;
  line-height: 2;
  letter-spacing: .14em;
  border: 1px dashed rgba(85, 61, 34, .24);
  background: rgba(255, 250, 232, .4);
}
.hzs-article-empty em {
  display: block;
  font-style: normal;
  color: rgba(139, 101, 43, .68);
  font-size: .7rem;
  letter-spacing: .3em;
  margin-top: 10px;
}

.hzs-articles-foot {
  margin-top: clamp(28px, 4vw, 40px);
  text-align: right;
}
.hzs-articles-more {
  display: inline-block;
  font-family: "Noto Serif SC", serif;
  font-size: .96rem;
  letter-spacing: .24em;
  padding: 8px 0 6px;
  border-bottom: 1px solid rgba(139, 101, 43, .5);
  color: var(--hzs-ink);
  text-decoration: none;
  transition: color .3s ease, border-color .3s ease, transform .3s ease;
}
.hzs-articles-more:hover {
  color: var(--hzs-cinnabar);
  border-bottom-color: var(--hzs-cinnabar);
  transform: translateX(4px);
}

/* ══════════════════════════════════════════════════════════════════════
   底部 · 學術方向導覽
   ══════════════════════════════════════════════════════════════════════ */

.hzs-nav {
  padding: clamp(40px, 6vw, 64px) 0 clamp(56px, 8vw, 88px);
}
.hzs-nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.hzs-nav a {
  font-family: "Noto Serif SC", serif;
  text-decoration: none;
  color: var(--hzs-ink-soft);
  font-size: .98rem;
  letter-spacing: .22em;
  padding: 8px 2px;
  border-bottom: 1px solid transparent;
  transition: color .3s ease, border-color .3s ease;
}
.hzs-nav a:hover {
  color: var(--hzs-cinnabar);
  border-bottom-color: var(--hzs-cinnabar);
}
.hzs-nav a.hzs-nav-home {
  color: rgba(139, 101, 43, .8);
  font-family: "Cinzel", serif;
  font-size: .74rem;
  letter-spacing: .34em;
  text-transform: uppercase;
}

/* ══════════════════════════════════════════════════════════════════════
   響應式
   ══════════════════════════════════════════════════════════════════════ */

@media (max-width: 860px) {
  .hzs-hero-wrap {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hzs-hero-aside {
    aspect-ratio: 16 / 9;
    max-height: 340px;
  }
  .hzs-body-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .hzs-hero { padding-top: calc(var(--nav-h, 74px) + 42px); padding-bottom: 64px; }
  .hzs-hero-zi { font-size: 2.45rem; letter-spacing: .08em; text-indent: .08em; }
  .hzs-hero-zi::after { right: -13px; top: 8px; width: 9px; height: 9px; }
  .hzs-hero-title { font-size: 1.08rem; letter-spacing: .16em; text-indent: .16em; }
  .hzs-hero-sub { letter-spacing: .04em; line-height: 1.9; }
  .hzs-article-link {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 18px 4px;
  }
  .hzs-article-no { font-size: .62rem; }
  .hzs-article-meta {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    margin-top: 4px;
  }
  .hzs-precepts { padding: 18px 16px; }
  .hzs-precepts dt { display: block; margin-bottom: 4px; }
  .hzs-precepts dd { display: block; }
}

/* 進入視口淡入 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .8s cubic-bezier(.22, 1, .36, 1), transform .8s cubic-bezier(.22, 1, .36, 1);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}