/* 书斋 Hub · 阴调布局（#page-shanyi 首页 #shanyi-home）
 * 底色：太极视频内宣纸 #fdf8f0 + paper-bg · 区外字 #151412 · 书本/标签墨色 80% + 反白字
 */

/* 书斋 Hub · 阴调布局（#page-shanyi 首页 #shanyi-home）
 * 底色：太极视频内宣纸 #fdf8f0 + paper-bg · 区外字 #151412 · 书本/标签墨色 80% + 反白字
 * 纸面：body 固定纹理 → main + footer 透明 · flex 撑满至底栏上沿
 */

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) {
  background-color: var(--scroll-paper, #fdf8f0);
  background-image: url("../assets/ink-home/keyframes/paper-bg.webp");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .app-wrapper {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-width: none;
  margin: 0;
  padding: 0 0 5.5rem;
  background: transparent;
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) #page-shanyi.active-page {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  margin-top: 0;
  padding-top: 0;
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .section--shanyi-hub {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  margin-top: 0;
  padding-top: 0;
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) #shanyi-home.shanyi-hub {
  flex: 1;
  min-height: 0;
  margin-top: 0;
  padding-top: 0;
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .site-footer {
  background: transparent;
  border-top: none;
  color: rgba(21, 20, 18, 0.68);
  font-size: clamp(0.76rem, 2.1vw, 0.82rem);
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .site-footer p,
body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .site-footer a {
  color: rgba(21, 20, 18, 0.68);
}

body:has(#page-shanyi.active-page:not([hidden]) #shanyi-home:not([hidden])) .site-footer a:hover {
  color: #151412;
}

.section--shanyi-hub {
  margin: 0;
  padding: 0;
}

#shanyi-home.shanyi-hub {
  margin-top: 0;
}

.shanyi-hub {
  --scroll-paper: #fdf8f0;
  --yin-bg: var(--scroll-paper);
  --yin-text: #151412;
  --yin-text-mid: #151412;
  --yin-text-dim: rgba(21, 20, 18, 0.68);
  --yin-border: rgba(21, 20, 18, 0.2);
  --yin-card-bg: rgba(78, 72, 64, 0.08);
  --yin-seal: #7a3a38;
  /* 书本/五术面板：墨色底 80% 不透明（20% 透宣纸）· 字反白 */
  --yin-panel-text: #fdf8f0;
  --yin-panel-text-dim: rgba(255, 252, 245, 0.76);
  --yin-panel-text-muted: rgba(255, 252, 245, 0.58);
  --yin-book-vol: rgba(21, 20, 18, 0.8);
  --yin-book-vol-border: rgba(78, 72, 64, 0.32);
  --yin-book-reading-panel: rgba(21, 20, 18, 0.8);
  --yin-book-cover-a: rgba(38, 35, 32, 0.8);
  --yin-book-cover-b: rgba(21, 20, 18, 0.8);
  --yin-book-card-bg: rgba(21, 20, 18, 0.8);
  --yin-book-progress-track: rgba(255, 252, 245, 0.16);
  --yin-cat-bg: rgba(21, 20, 18, 0.8);
  --yin-cat-hover-bg: rgba(30, 28, 25, 0.84);
  --yin-cat-active-bg: rgba(32, 30, 27, 0.88);
  --yin-cat-border: rgba(78, 72, 64, 0.32);
  --yin-cat-active-border: rgba(255, 252, 245, 0.28);
  /* 字号阶梯：手机略放大，桌面克制 */
  --yin-fs-hero: clamp(2rem, 5.5vw, 2.35rem);
  --yin-fs-tagline: clamp(0.84rem, 2.4vw, 0.92rem);
  --yin-fs-body: clamp(0.8rem, 2.3vw, 0.88rem);
  --yin-fs-section: clamp(0.9rem, 2.5vw, 0.98rem);
  --yin-fs-ui: clamp(0.74rem, 2.15vw, 0.82rem);
  --yin-fs-caption: clamp(0.7rem, 2vw, 0.76rem);
  --yin-fs-cat-name: clamp(1.02rem, 2.85vw, 1.14rem);
  --yin-fs-cat-desc: clamp(0.72rem, 2.1vw, 0.82rem);
  --yin-fs-panel-title: clamp(0.92rem, 2.65vw, 1.02rem);
  --yin-fs-panel-body: clamp(0.78rem, 2.25vw, 0.86rem);
  --yin-fs-panel-caption: clamp(0.72rem, 2.05vw, 0.78rem);
  --yin-fs-book-title: clamp(0.78rem, 2.6vw, 0.96rem);

  position: relative;
  flex: 1;
  min-height: 0;
  background: transparent;
  color: var(--yin-text);
  overflow: hidden;
}

.shanyi-hub::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 水墨漩涡 */
.shanyi-hub__vortex {
  position: absolute;
  top: -6%;
  right: -30%;
  width: 95%;
  height: 38%;
  pointer-events: none;
  z-index: 0;
}

.shanyi-hub__vortex-layer {
  position: absolute;
  inset: 0;
}

.shanyi-hub__vortex-layer--1 {
  background: radial-gradient(
    ellipse 55% 48% at 42% 48%,
    rgba(78, 72, 64, 0.18) 0%,
    rgba(78, 72, 64, 0.08) 28%,
    transparent 68%
  );
  filter: blur(3px);
  transform: rotate(-15deg);
}

.shanyi-hub__vortex-layer--2 {
  background: radial-gradient(
    ellipse 42% 38% at 40% 50%,
    rgba(255, 252, 245, 0.06) 0%,
    rgba(78, 72, 64, 0.1) 45%,
    transparent 70%
  );
  filter: blur(10px);
}

.shanyi-hub__vortex-layer--3 {
  background: conic-gradient(
    from 200deg at 44% 44%,
    transparent 0deg,
    rgba(255, 252, 245, 0.08) 70deg,
    transparent 140deg,
    rgba(78, 72, 64, 0.08) 220deg,
    transparent 300deg
  );
  filter: blur(5px);
}

.shanyi-hub__inner {
  position: relative;
  z-index: 1;
  padding: 1.35rem 1.1rem 1.5rem;
  max-width: 920px;
  margin: 0 auto;
}

/* Hero */
.shanyi-hub__hero {
  max-width: 62%;
  margin-bottom: 1.85rem;
}

.shanyi-hub__hero-title-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.5rem;
}

.shanyi-hub__hero-title {
  font-family: var(--font-display);
  font-size: var(--yin-fs-hero);
  font-weight: 600;
  color: var(--yin-text-mid);
  letter-spacing: 0.14em;
  line-height: 1.05;
  margin: 0;
}

.shanyi-hub__tagline {
  font-family: var(--font-display);
  font-size: var(--yin-fs-tagline);
  color: var(--yin-text-dim);
  letter-spacing: 0.16em;
  margin: 0 0 0.85rem;
}

.shanyi-hub__intro {
  font-size: var(--yin-fs-body);
  line-height: 1.8;
  color: var(--yin-text-dim);
  margin: 0;
  font-weight: 300;
}

/* Section */
.shanyi-hub__section {
  margin-bottom: 1.65rem;
}

.shanyi-hub__section-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.shanyi-hub__section-title {
  font-family: var(--font-display);
  font-size: var(--yin-fs-section);
  font-weight: 600;
  color: var(--yin-text-mid);
  letter-spacing: 0.12em;
  margin: 0;
  white-space: nowrap;
}

.shanyi-hub__section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--yin-border), transparent);
}

/* 经籍分类 · 竖卡 */
.shanyi-hub__cat-row {
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 0.15rem;
}

.shanyi-hub__cat-row::-webkit-scrollbar {
  display: none;
}

.shanyi-cat-card {
  flex: 0 0 calc(20% - 0.36rem);
  min-width: 58px;
  height: 158px;
  position: relative;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 0.5rem 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid var(--yin-cat-border);
  background: var(--yin-cat-bg);
  color: var(--yin-panel-text);
  cursor: pointer;
  font: inherit;
  text-align: center;
  overflow: hidden;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.shanyi-cat-card:hover {
  border-color: var(--yin-cat-active-border);
  background: var(--yin-cat-hover-bg);
}

.shanyi-cat-card:focus-visible {
  outline: 2px solid rgba(78, 72, 64, 0.45);
  outline-offset: 2px;
}

.shanyi-cat-card.active {
  background: var(--yin-cat-active-bg);
  border-color: var(--yin-cat-active-border);
  box-shadow: inset 0 1px 0 rgba(255, 252, 245, 0.06);
}

.shanyi-cat-card__text {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  justify-content: center;
  gap: 0.35rem;
}

.shanyi-cat-card__desc {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: var(--yin-fs-cat-desc);
  line-height: 1.26;
  color: var(--yin-panel-text-dim);
  letter-spacing: 0.01em;
}

.shanyi-cat-card__name {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-display);
  font-size: var(--yin-fs-cat-name);
  font-weight: 600;
  line-height: 1.32;
  color: var(--yin-panel-text);
  letter-spacing: 0.12em;
}

/* 最近在读 */
.shanyi-hub__reading {
  min-height: 4.5rem;
}

.shanyi-hub__reading-empty {
  font-size: var(--yin-fs-body);
  color: var(--yin-text-dim);
  line-height: 1.65;
  padding: 0.5rem 0;
}

.shanyi-hub__reading-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.7rem;
  align-items: stretch;
  padding: 0.8rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--yin-book-vol-border);
  background: var(--yin-book-reading-panel);
}

.shanyi-hub__book-stack {
  position: relative;
  align-self: stretch;
  height: 100%;
  width: auto;
  aspect-ratio: 2 / 3;
  min-height: 4.75rem;
  max-width: 4.85rem;
  flex-shrink: 0;
}

.shanyi-hub__book-vol {
  position: absolute;
  width: 71%;
  height: 100%;
  border-radius: 2px 3px 3px 2px;
  border: 1px solid var(--yin-book-vol-border);
  background: var(--yin-book-vol);
}

.shanyi-hub__book-vol--3 {
  left: 21%;
  top: 12%;
  height: 86%;
  transform: rotate(-5deg);
  opacity: 0.4;
}

.shanyi-hub__book-vol--2 {
  left: 10%;
  top: 6%;
  height: 93%;
  transform: rotate(-2deg);
  opacity: 0.6;
}

.shanyi-hub__book-vol--1 {
  left: 0;
  top: 0;
  z-index: 1;
  width: 71%;
  height: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 0.38rem 0.28rem;
  box-sizing: border-box;
  overflow: hidden;
}

.shanyi-hub__book-vol--1::before {
  content: "";
  position: absolute;
  top: 8%;
  right: 14%;
  bottom: 8%;
  width: 1px;
  background: rgba(255, 252, 245, 0.14);
  box-shadow: 0.22rem 0 0 rgba(255, 252, 245, 0.08);
  pointer-events: none;
}

.shanyi-hub__book-vol-title {
  position: relative;
  z-index: 1;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-display);
  font-size: clamp(0.62rem, 2.8vw, 0.78rem);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: 0.1em;
  color: var(--yin-panel-text);
  max-height: 92%;
  overflow: hidden;
  margin-top: 4%;
  margin-left: 6%;
}

.shanyi-hub__reading-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.shanyi-hub__reading-title {
  font-family: var(--font-display);
  font-size: var(--yin-fs-panel-title);
  font-weight: 600;
  color: var(--yin-panel-text);
  margin: 0 0 0.35rem;
}

.shanyi-hub__reading-meta {
  font-size: var(--yin-fs-panel-body);
  line-height: 1.65;
  color: var(--yin-panel-text-dim);
  margin: 0 0 0.55rem;
}

.shanyi-hub__reading-progress-label {
  font-size: var(--yin-fs-panel-caption);
  color: var(--yin-panel-text-muted);
  margin-bottom: 0.25rem;
}

.shanyi-hub__reading-progress {
  height: 2px;
  background: var(--yin-book-progress-track);
  border-radius: 1px;
  overflow: hidden;
}

.shanyi-hub__reading-progress-fill {
  height: 100%;
  background: linear-gradient(to right, rgba(255, 252, 245, 0.35), rgba(255, 252, 245, 0.88));
  border-radius: 1px;
}

.shanyi-hub__reading-action {
  display: flex;
  align-items: flex-end;
}

.shanyi-hub__btn-continue {
  padding: 0.42rem 0.65rem;
  font-family: var(--font-body);
  font-size: var(--yin-fs-ui);
  letter-spacing: 0.06em;
  color: var(--yin-panel-text);
  background: transparent;
  border: 1px solid rgba(255, 252, 245, 0.32);
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}

.shanyi-hub__btn-continue:hover {
  border-color: rgba(255, 252, 245, 0.48);
  background: rgba(255, 252, 245, 0.08);
}

.shanyi-hub__btn-continue:focus-visible {
  outline: 2px solid rgba(255, 252, 245, 0.45);
  outline-offset: 2px;
}

/* 筛选后书单 · 竖排古籍封面 */
.shanyi-hub__book-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

@media (min-width: 720px) {
  .shanyi-hub__book-grid {
    grid-template-columns: repeat(auto-fill, minmax(6.25rem, 7.5rem));
    gap: 0.85rem;
    justify-content: start;
  }
}

.shanyi-hub .shanyi-book-card--classic {
  width: 100%;
  max-width: none;
  margin: 0;
  background: var(--yin-cat-bg);
  border: 1px solid var(--yin-cat-border);
  border-radius: 6px;
  overflow: hidden;
  transition: background 0.2s ease, border-color 0.2s ease;
}

@media (min-width: 720px) {
  .shanyi-hub .shanyi-book-card--classic {
    max-width: 7.5rem;
  }
}

.shanyi-hub .shanyi-book-card--classic:hover {
  border-color: var(--yin-cat-active-border);
  background: var(--yin-cat-hover-bg);
  box-shadow: none;
}

.shanyi-hub .shanyi-book-card--classic:focus-visible {
  outline: 2px solid rgba(21, 20, 18, 0.45);
  outline-offset: 2px;
}

.shanyi-hub .shanyi-book-card--classic .shanyi-book-card__cover {
  position: relative;
  aspect-ratio: 2 / 3;
  width: 100%;
  margin: 0;
  padding: 0.65rem 0.5rem;
  box-sizing: border-box;
  background: var(--yin-cat-bg);
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  overflow: hidden;
}

.shanyi-hub .shanyi-book-card--classic .shanyi-book-card__cover::before {
  content: "";
  position: absolute;
  top: 8%;
  right: 11%;
  bottom: 8%;
  width: 1px;
  background: rgba(255, 252, 245, 0.14);
  box-shadow: 0.45rem 0 0 rgba(255, 252, 245, 0.08);
  pointer-events: none;
}

.shanyi-hub .shanyi-book-card__cover-title {
  position: relative;
  z-index: 1;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-display);
  font-size: var(--yin-fs-book-title);
  font-weight: 600;
  line-height: 1.34;
  letter-spacing: 0.12em;
  color: var(--yin-panel-text);
  max-height: 88%;
  overflow: hidden;
  margin-top: 6%;
  margin-left: 8%;
}

@media (max-width: 719px) {
  .shanyi-hub .shanyi-book-card--classic .shanyi-book-card__cover {
    padding: 0.45rem 0.32rem;
  }

  .shanyi-hub .shanyi-book-card--classic .shanyi-book-card__cover::before {
    box-shadow: 0.3rem 0 0 rgba(255, 252, 245, 0.08);
  }
}

.shanyi-hub__disclaimer {
  font-size: var(--yin-fs-caption);
  color: var(--yin-text-dim) !important;
  margin-top: 0.5rem;
  line-height: 1.65;
}

.shanyi-hub__disclaimer a {
  color: var(--yin-text-mid) !important;
}

.shanyi-hub .shanyi-home__loading,
.shanyi-hub .shanyi-home__empty {
  font-size: var(--yin-fs-body);
  color: var(--yin-text-dim);
  grid-column: 1 / -1;
  line-height: 1.65;
}

@media (max-width: 420px) {
  .shanyi-hub__hero {
    max-width: 72%;
  }

  .shanyi-cat-card {
    min-width: 54px;
    height: 158px;
  }
}