/* ============================================================
   INDIGO — 靛蓝现代  indigo.css
   现代 SaaS 风：靛蓝主色 + 玻璃拟态 + 渐变
   ============================================================ */

:root {
  --id-white:     #ffffff;
  --id-bg:        #f8fafc;
  --id-bg-2:      #f1f5f9;
  --id-line:      #e2e8f0;
  --id-ink:       #0f172a;
  --id-ink-2:     #1e293b;
  --id-text:      #334155;
  --id-text-soft: #64748b;
  --id-text-dim:  #94a3b8;
  --id-indigo:    #4f46e5;
  --id-indigo-2:  #6366f1;
  --id-indigo-soft: #818cf8;
  --id-indigo-bg: #eef2ff;
  --id-amber:     #f59e0b;
  --id-amber-bg:  #fef3c7;
  --id-green:     #22c55e;
  --id-green-bg:  #dcfce7;
  --id-red:       #ef4444;
  --id-shadow:    0 1px 3px rgba(15,23,42,.06), 0 4px 16px rgba(15,23,42,.04);
  --id-shadow-lg: 0 4px 8px rgba(15,23,42,.08), 0 16px 32px rgba(15,23,42,.06);
  --id-display:   'Instrument Serif', 'Source Han Serif SC', 'Songti SC', 'STSong', 'Times New Roman', serif;
  --id-body:      'Inter', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --id-mono:      'JetBrains Mono', 'SF Mono', 'Menlo', 'Consolas', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--id-white);
  color: var(--id-text);
  font-family: var(--id-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--id-indigo); text-decoration: none; transition: color .15s; }
a:hover { color: var(--id-indigo-2); }

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

::selection { background: var(--id-indigo); color: var(--id-white); }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--id-bg); }
::-webkit-scrollbar-thumb { background: var(--id-indigo-soft); border-radius: 4px; }

.container { max-width: 1200px; }

/* ============================================================
   HEADER
   ============================================================ */

.id-header {
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--id-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.id-header-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}

.id-header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--id-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--id-ink);
  letter-spacing: -0.3px;
  text-decoration: none;
}
.id-header-logo::before {
  content: "";
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--id-indigo), var(--id-indigo-soft));
  border-radius: 8px;
}
.id-header-logo:hover { color: var(--id-indigo); }

.id-header-nav {
  display: flex;
  flex: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.id-header-nav::-webkit-scrollbar { display: none; }
.id-header-nav li a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--id-text);
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  white-space: nowrap;
  text-decoration: none;
  transition: all .15s;
}
.id-header-nav li a:hover { background: var(--id-bg); color: var(--id-ink); }
.id-header-nav li a.active {
  background: var(--id-indigo-bg);
  color: var(--id-indigo);
}

.id-header-tools { display: flex; align-items: center; gap: 8px; }

.id-header-search {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: var(--id-bg);
  color: var(--id-text-soft);
  font-size: 13px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all .15s;
  text-decoration: none;
}
.id-header-search:hover {
  background: var(--id-indigo-bg);
  border-color: var(--id-indigo-soft);
  color: var(--id-indigo);
}
.id-header-search img { width: 14px; height: 14px; opacity: .6; }

.id-header-burger {
  display: none;
  width: 36px; height: 36px;
  background: var(--id-bg);
  border: 1px solid var(--id-line);
  color: var(--id-ink);
  font-size: 16px;
  cursor: pointer;
  border-radius: 8px;
}

/* Drawer */
.id-drawer {
  position: fixed;
  top: 0; right: -300px;
  width: 300px; height: 100%;
  background: var(--id-white);
  border-left: 1px solid var(--id-line);
  z-index: 1000;
  transition: right .3s ease;
  overflow-y: auto;
  padding: 24px;
}
.id-drawer.is-open { right: 0; }
.id-drawer-mask {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.5);
  z-index: 999;
  display: none;
}
.id-drawer-mask.is-open { display: block; }
.id-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--id-line);
  margin-bottom: 20px;
}
.id-drawer-head h3 {
  margin: 0;
  font-family: var(--id-display);
  font-size: 22px;
  letter-spacing: -0.3px;
}
.id-drawer-close {
  width: 32px; height: 32px;
  background: var(--id-bg);
  border: 1px solid var(--id-line);
  color: var(--id-ink);
  font-size: 16px;
  cursor: pointer;
  border-radius: 8px;
}
.id-drawer-nav { list-style: none; padding: 0; margin: 0; }
.id-drawer-nav li a {
  display: block;
  padding: 12px 0;
  color: var(--id-text);
  border-bottom: 1px solid var(--id-line);
  font-size: 16px;
  font-weight: 500;
}
.id-drawer-nav li a:hover { color: var(--id-indigo); }

/* ============================================================
   BREADCRUMB
   ============================================================ */

.id-crumb {
  list-style: none;
  padding: 20px 0 0;
  margin: 0;
  font-size: 13px;
  color: var(--id-text-soft);
}
.id-crumb li { display: inline; }
.id-crumb li::after { content: "/"; color: var(--id-text-dim); margin: 0 8px; }
.id-crumb li:last-child::after { content: ""; }
.id-crumb a { color: var(--id-text-soft); }
.id-crumb a:hover { color: var(--id-indigo); }
.id-crumb .id-crumb-curr { color: var(--id-ink); font-weight: 500; }

/* ============================================================
   SECTION HEAD
   ============================================================ */

.id-section { padding: 80px 0; position: relative; }

.id-section-head {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 32px;
}

.id-section-title {
  margin: 0;
  font-family: var(--id-display);
  font-size: 36px;
  font-weight: 600;
  color: var(--id-ink);
  letter-spacing: -0.5px;
  line-height: 1.1;
  flex: 1;
}
.id-section-title::before {
  content: "";
  display: inline-block;
  width: 4px; height: 36px;
  background: var(--id-indigo);
  margin-right: 12px;
  vertical-align: middle;
  border-radius: 2px;
}

.id-section-en {
  font-size: 13px;
  color: var(--id-text-soft);
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 600;
}

.id-section-tag {
  font-family: var(--id-mono);
  font-size: 12px;
  color: var(--id-text-soft);
  padding: 6px 12px;
  background: var(--id-bg);
  border-radius: 6px;
  letter-spacing: 0.5px;
}
.id-section-tag em { color: var(--id-indigo); font-style: normal; font-weight: 600; }

/* ============================================================
   1. HERO — 渐变大字 轮播 5 本
   ============================================================ */

.id-hero {
  position: relative;
  min-height: 820px;
  padding: 60px 0 40px;
  background: var(--id-white);
  overflow: hidden;
}

/* Decorative background blobs */
.id-hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .35;
  pointer-events: none;
}
.id-hero-blob.b1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--id-indigo-soft), transparent);
  top: -100px; right: -100px;
}
.id-hero-blob.b2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--id-amber), transparent);
  bottom: -50px; left: -50px;
  opacity: .25;
}

.id-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 720px;
}

.id-hero-slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity .6s ease;
  pointer-events: none;
}
.id-hero-slide.is-active {
  /* keep position: absolute so all slides overlap; only opacity changes */
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.id-hero-text {
  padding: 0 10px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.id-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--id-indigo);
  text-transform: uppercase;
  margin-bottom: 20px;
  padding: 6px 14px;
  background: var(--id-indigo-bg);
  border-radius: 20px;
}
.id-hero-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--id-indigo);
  border-radius: 50%;
}
.id-hero-h1 {
  font-family: var(--id-display);
  font-size: 72px;
  font-weight: 600;
  color: var(--id-ink);
  margin: 0 0 16px;
  line-height: 1.05;
  letter-spacing: -2px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 151px;
}
.id-hero-byline {
  font-size: 14px;
  color: var(--id-text-soft);
  margin-bottom: 20px;
  min-height: 24px;  /* lock 1-line height, prevent long author names from wrapping */
}
.id-hero-byline strong { color: var(--id-ink); font-weight: 600; }
.id-hero-desc {
  color: var(--id-text);
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 28px;
  max-width: 540px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 84px;  /* 16 × 1.75 × 3 = 84, lock 3-line height */
}
.id-hero-btn {
  display: inline-flex;
  align-self: flex-start;  /* prevent flex column stretch from filling width */
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--id-indigo);
  color: var(--id-white);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  border-radius: 10px;
  border: none;
  text-decoration: none;
  transition: all .15s;
  box-shadow: 0 4px 12px rgba(79,70,229,.3);
}
.id-hero-btn:hover {
  background: var(--id-indigo-2);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(79,70,229,.4);
}
.id-hero-btn::after { content: "→"; }

.id-hero-img-wrap {
  position: relative;
  perspective: 1200px;
  max-width: 420px;
  margin: 0 auto;
}
.id-hero-img {
  position: relative;
  aspect-ratio: 3/4;
  background: var(--id-bg);
  overflow: hidden;
  border-radius: 16px;
  box-shadow: var(--id-shadow-lg);
  transform: rotate(-3deg);
  transition: transform .3s;
}
.id-hero-img:hover { transform: rotate(0deg) scale(1.02); }
.id-hero-img img { width: 100%; height: 100%; object-fit: cover; }

.id-hero-dots {
  position: absolute;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}
.id-hero-dots button {
  width: 32px; height: 4px;
  background: var(--id-line);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  padding: 0;
  transition: all .2s;
}
.id-hero-dots button.is-active { background: var(--id-indigo); width: 48px; }

/* ============================================================
   2. CARD GRID — 整齐卡片 6-15 (10 本)
   ============================================================ */

.id-grid {
  background: var(--id-bg);
  padding: 80px 0;
}

.id-grid-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.id-grid-card {
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--id-ink);
  display: block;
  overflow: hidden;
  transition: all .2s;
  position: relative;
}
.id-grid-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--id-shadow-lg);
  border-color: var(--id-indigo-soft);
}

.id-grid-card-img {
  aspect-ratio: 3/4;
  background: var(--id-bg);
  overflow: hidden;
  position: relative;
}
.id-grid-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.id-grid-card:hover .id-grid-card-img img { transform: scale(1.05); }
.id-grid-card-no {
  position: absolute;
  top: 8px; left: 8px;
  background: rgba(15,23,42,.85);
  color: var(--id-white);
  font-family: var(--id-mono);
  font-size: 11px;
  letter-spacing: 1px;
  padding: 3px 8px;
  border-radius: 4px;
  z-index: 1;
}

.id-grid-card-body { padding: 14px 16px 16px; }
.id-grid-card-h {
  font-family: var(--id-body);
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--id-ink);
}
.id-grid-card-meta {
  font-size: 12px;
  color: var(--id-text-soft);
  display: flex;
  justify-content: space-between;
}
.id-grid-card-cat {
  color: var(--id-indigo);
  font-weight: 500;
}

/* ============================================================
   3. FEATURE — 横版大字 16-25 (10 本)
   ============================================================ */

.id-feature {
  background: var(--id-white);
  padding: 80px 0;
}

.id-feature-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.id-feature-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 16px;
  padding: 20px;
  text-decoration: none;
  color: var(--id-ink);
  transition: all .25s;
  align-items: center;
}
.id-feature-item:hover {
  border-color: var(--id-indigo-soft);
  box-shadow: var(--id-shadow-lg);
  transform: translateX(4px);
}

.id-feature-img {
  width: 200px; height: 266px;
  background: var(--id-bg);
  overflow: hidden;
  border-radius: 10px;
  box-shadow: var(--id-shadow);
}
.id-feature-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.id-feature-item:hover .id-feature-img img { transform: scale(1.04); }

.id-feature-body { flex: 1; }
.id-feature-cat {
  display: inline-block;
  padding: 3px 10px;
  background: var(--id-indigo-bg);
  color: var(--id-indigo);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  border-radius: 4px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.id-feature-h {
  font-family: var(--id-display);
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.id-feature-author { font-size: 13px; color: var(--id-text-soft); margin-bottom: 12px; }
.id-feature-author strong { color: var(--id-ink); font-weight: 600; }
.id-feature-desc {
  font-size: 14px;
  color: var(--id-text);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   4. STATS — 统计榜 26-35 (10 本)
   ============================================================ */

.id-stats {
  background: var(--id-ink);
  padding: 80px 0;
  color: var(--id-white);
}

.id-stats .id-section-title { color: var(--id-white); }
.id-stats .id-section-title::before { background: var(--id-amber); }
.id-stats .id-section-en { color: rgba(255,255,255,.6); }
.id-stats .id-section-tag { background: rgba(255,255,255,.1); color: var(--id-amber-bg); }
.id-stats .id-section-tag em { color: var(--id-amber); }

.id-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.id-stats-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  text-decoration: none;
  color: var(--id-white);
  transition: all .2s;
}
.id-stats-item:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--id-amber);
  transform: translateX(4px);
}

.id-stats-no {
  font-family: var(--id-display);
  font-size: 36px;
  color: var(--id-amber);
  min-width: 60px;
  text-align: center;
  font-weight: 600;
}

.id-stats-cover {
  width: 50px; height: 70px;
  background: rgba(255,255,255,.05);
  overflow: hidden;
  border-radius: 6px;
  flex-shrink: 0;
}
.id-stats-cover img { width: 100%; height: 100%; object-fit: cover; }

.id-stats-info { flex: 1; min-width: 0; }
.id-stats-h {
  font-family: var(--id-body);
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.id-stats-meta {
  font-size: 12px;
  color: rgba(255,255,255,.6);
  display: flex;
  gap: 8px;
}
.id-stats-cat { color: var(--id-amber); font-weight: 500; }

/* ============================================================
   5. NEW — 最新上架 30
   ============================================================ */

.id-new {
  background: var(--id-bg);
  padding: 80px 0;
}

.id-new-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.id-new-card {
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 10px;
  text-decoration: none;
  color: var(--id-ink);
  display: block;
  overflow: hidden;
  transition: all .2s;
}
.id-new-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--id-shadow);
  border-color: var(--id-indigo-soft);
}

.id-new-card-img {
  aspect-ratio: 3/4;
  background: var(--id-bg);
  overflow: hidden;
  position: relative;
}
.id-new-card-img img { width: 100%; height: 100%; object-fit: cover; }
.id-new-card-tag {
  position: absolute;
  top: 8px; left: 8px;
  padding: 3px 8px;
  background: rgba(79,70,229,.95);
  color: var(--id-white);
  font-size: 10px;
  font-weight: 600;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.id-new-card-time {
  position: absolute;
  bottom: 8px; right: 8px;
  padding: 2px 6px;
  background: rgba(15,23,42,.85);
  color: var(--id-white);
  font-family: var(--id-mono);
  font-size: 10px;
  letter-spacing: 0.5px;
  border-radius: 4px;
}

.id-new-card-body { padding: 12px 14px; }
.id-new-card-h {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 4px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--id-ink);
}
.id-new-card-author {
  font-size: 11px;
  color: var(--id-text-soft);
}

/* ============================================================
   6. SHELF — 下拉分类书架 6×12=72
   ============================================================ */

.id-shelf {
  background: var(--id-white);
  padding: 80px 0;
}

.id-shelf-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 2px solid var(--id-line);
  margin-bottom: 24px;
  position: relative;
}
.id-shelf-tab {
  padding: 14px 24px;
  background: transparent;
  border: none;
  color: var(--id-text-soft);
  font-family: var(--id-body);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  border-radius: 8px 8px 0 0;
  transition: all .2s;
  letter-spacing: 0.2px;
  position: relative;
}
.id-shelf-tab:hover { color: var(--id-indigo); background: var(--id-indigo-bg); }
.id-shelf-tab.is-active {
  color: var(--id-indigo);
  border-bottom-color: var(--id-indigo);
  font-weight: 600;
  background: var(--id-indigo-bg);
}

.id-shelf-block-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  padding: 16px 20px;
  background: linear-gradient(135deg, var(--id-indigo-bg) 0%, var(--id-bg) 100%);
  border-left: 4px solid var(--id-indigo);
  border-radius: 6px;
}
.id-shelf-block-num {
  font-family: var(--id-mono);
  font-size: 12px;
  color: var(--id-indigo);
  letter-spacing: 2px;
  font-weight: 600;
  background: var(--id-white);
  padding: 3px 10px;
  border-radius: 4px;
  flex-shrink: 0;
}
.id-shelf-block-title {
  font-family: var(--id-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--id-ink);
  margin: 0;
  letter-spacing: -0.3px;
  flex: 1;
}
.id-shelf-block-meta {
  font-size: 13px;
  color: var(--id-text-soft);
  font-weight: 500;
  flex-shrink: 0;
}
.id-shelf-block-more {
  text-align: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--id-line);
}
.id-shelf-block-more-btn {
  display: inline-block;
  padding: 10px 28px;
  background: var(--id-indigo);
  color: var(--id-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(79,70,229,.3);
  transition: all .15s;
}
.id-shelf-block-more-btn:hover {
  background: var(--id-indigo-2);
  color: var(--id-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(79,70,229,.4);
}

.id-shelf-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  row-gap: 24px;
}

.id-shelf-book {
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 10px;
  text-decoration: none;
  color: var(--id-ink);
  display: block;
  overflow: hidden;
  transition: all .2s;
}
.id-shelf-book:hover {
  transform: translateY(-2px);
  box-shadow: var(--id-shadow);
  border-color: var(--id-indigo-soft);
}

.id-shelf-book-img {
  aspect-ratio: 3/4;
  background: var(--id-bg);
  overflow: hidden;
}
.id-shelf-book-img img { width: 100%; height: 100%; object-fit: cover; }

.id-shelf-book-body { padding: 10px 12px 12px; }
.id-shelf-book-h {
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 4px;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--id-ink);
}
.id-shelf-book-meta {
  font-size: 11px;
  color: var(--id-text-soft);
}

/* ============================================================
   BOOK DETAIL
   ============================================================ */

.id-detail { padding: 20px 0 60px; }

.id-detail-main {
  background: var(--id-white);
  padding: 60px 0;
  border-bottom: 1px solid var(--id-line);
}
.id-detail-inner {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 60px;
  align-items: start;
}
.id-detail-cover {
  aspect-ratio: 3/4;
  background: var(--id-bg);
  overflow: hidden;
  border-radius: 12px;
  box-shadow: var(--id-shadow-lg);
  border: 1px solid var(--id-line);
}
.id-detail-cover img { width: 100%; height: 100%; object-fit: cover; }
.id-detail-info { padding-top: 12px; }
.id-detail-h1 {
  font-family: var(--id-display);
  font-size: 44px;
  font-weight: 600;
  color: var(--id-ink);
  margin: 0 0 16px;
  line-height: 1.1;
  letter-spacing: -1px;
}
.id-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
  padding: 12px 0;
  border-top: 1px solid var(--id-line);
  border-bottom: 1px solid var(--id-line);
  font-size: 14px;
  color: var(--id-text-soft);
}
.id-detail-meta strong { color: var(--id-ink); font-weight: 500; }

.id-detail-desc {
  font-size: 16px;
  color: var(--id-text);
  line-height: 1.85;
  margin-bottom: 28px;
  position: relative;
  max-height: 7.2em;
  overflow: hidden;
}
.id-detail-desc::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2.4em;
  background: linear-gradient(180deg, rgba(255,255,255,0), var(--id-white) 80%);
  pointer-events: none;
}

.id-detail-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--id-indigo);
  color: var(--id-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(79,70,229,.3);
  transition: all .15s;
}
.id-detail-btn:hover {
  background: var(--id-indigo-2);
  color: var(--id-white);
  transform: translateY(-2px);
}
.id-detail-btn::after { content: "→"; }

.id-detail-latest {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--id-line);
  font-size: 14px;
  color: var(--id-text-soft);
}
.id-detail-latest a { color: var(--id-indigo); font-weight: 500; }

/* Tab */
.id-detail-tab {
  background: var(--id-white);
  padding: 60px 0;
  border-bottom: 1px solid var(--id-line);
}
.id-detail-tab-head {
  display: flex;
  gap: 32px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--id-line);
}
.id-detail-tab-head button {
  padding: 12px 0;
  background: transparent;
  border: none;
  color: var(--id-text-soft);
  font-family: var(--id-display);
  font-size: 20px;
  border-bottom: 2px solid transparent;
  cursor: default;
  margin-bottom: -1px;
  font-weight: 600;
}
.id-detail-tab-head button.active {
  color: var(--id-indigo);
  border-bottom-color: var(--id-indigo);
}

.id-detail-excerpt {
  font-size: 16px;
  line-height: 1.85;
  max-height: 480px;
  overflow: hidden;
  position: relative;
}
.id-detail-excerpt::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 60px;
  background: linear-gradient(180deg, transparent, var(--id-white));
}

.id-detail-mulu-h {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--id-line);
}
.id-detail-mulu-h h2 {
  margin: 0;
  font-family: var(--id-display);
  font-size: 24px;
  font-weight: 600;
  color: var(--id-ink);
}
.id-detail-mulu-h span { color: var(--id-text-soft); font-size: 14px; }

.id-chapter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.id-chapter-grid a {
  display: block;
  padding: 10px 14px;
  color: var(--id-text);
  font-size: 14px;
  border: 1px solid var(--id-line);
  border-radius: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-decoration: none;
  transition: all .15s;
  background: var(--id-white);
}
.id-chapter-grid a:hover {
  background: var(--id-indigo);
  color: var(--id-white);
  border-color: var(--id-indigo);
}

.id-detail-more {
  text-align: center;
  margin-top: 28px;
}
.id-detail-more a {
  display: inline-block;
  padding: 12px 28px;
  background: var(--id-white);
  color: var(--id-indigo);
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--id-indigo);
  border-radius: 8px;
  text-decoration: none;
  letter-spacing: 0.3px;
  transition: all .15s;
}
.id-detail-more a:hover { background: var(--id-indigo); color: var(--id-white); }

/* Sidebar */
.id-side {
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
.id-side-h {
  font-family: var(--id-display);
  font-size: 18px;
  color: var(--id-ink);
  letter-spacing: -0.3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--id-line);
  margin: 0 0 14px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-weight: 600;
}
.id-side-h a { font-size: 12px; color: var(--id-text-soft); font-weight: 500; }
.id-side-h a:hover { color: var(--id-indigo); }

.id-side-book {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--id-line);
  text-decoration: none;
  color: var(--id-ink);
}
.id-side-book:last-child { border-bottom: none; }
.id-side-book:hover .id-side-book-h { color: var(--id-indigo); }
.id-side-book-cover {
  width: 50px; height: 70px;
  background: var(--id-bg);
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 4px;
}
.id-side-book-cover img { width: 100%; height: 100%; object-fit: cover; }
.id-side-book-h {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.3;
}
.id-side-book-meta { font-size: 11px; color: var(--id-text-soft); }

/* ============================================================
   BOOK CHAPTER (READER) — Reading focused
   ============================================================ */

.id-reader {
  background: var(--id-white);
  padding: 60px 0;
}
.id-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--id-indigo);
  z-index: 199;
  width: 0;
  transition: width .1s linear;
  box-shadow: 0 0 8px rgba(79,70,229,.4);
}

.id-reader-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
}

.id-reader-h {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--id-line);
}
.id-reader-title {
  font-family: var(--id-display);
  font-size: 32px;
  font-weight: 600;
  color: var(--id-ink);
  margin: 0 0 12px;
  line-height: 1.2;
  letter-spacing: -0.5px;
}
.id-reader-meta {
  font-size: 13px;
  color: var(--id-text-soft);
}

.id-reader-body {
  font-family: var(--id-body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.95;
  color: var(--id-text);
  letter-spacing: 0.2px;
}
.id-reader-body p { margin: 0 0 1.3em; }

.id-tb {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
}
.id-tb-btn {
  width: 48px; height: 48px;
  background: var(--id-white);
  border: 1px solid var(--id-line);
  color: var(--id-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 12px;
  font-family: var(--id-body);
  transition: all .15s;
  font-weight: 500;
  font-size: 11px;
  box-shadow: var(--id-shadow);
}
.id-tb-btn:hover {
  background: var(--id-indigo);
  color: var(--id-white);
  border-color: var(--id-indigo);
}
.id-tb-btn span { font-size: 16px; line-height: 1; margin-bottom: 1px; }

.id-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,.5);
  z-index: 210;
  display: none;
}
.id-overlay.active { display: block; }

.id-read-drawer {
  position: fixed;
  top: 0; left: 0;
  width: 320px; height: 100%;
  background: var(--id-white);
  border-right: 1px solid var(--id-line);
  z-index: 220;
  transform: translateX(-100%);
  transition: transform .3s;
  display: flex;
  flex-direction: column;
}
.id-read-drawer.active { transform: translateX(0); }
.id-read-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--id-line);
}
.id-read-drawer-head h4 {
  margin: 0;
  font-family: var(--id-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--id-ink);
}
.id-read-drawer-head button {
  width: 32px; height: 32px;
  background: var(--id-bg);
  border: 1px solid var(--id-line);
  color: var(--id-text);
  font-size: 18px;
  cursor: pointer;
  border-radius: 8px;
}
.id-read-drawer-body { flex: 1; overflow-y: auto; padding: 8px 0; }
.id-read-drawer-body a {
  display: block;
  padding: 12px 20px;
  color: var(--id-text-soft);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--id-line);
  line-height: 1.5;
  transition: all .15s;
}
.id-read-drawer-body a:hover { color: var(--id-indigo); background: var(--id-bg); }
.id-read-drawer-body a.active {
  color: var(--id-white);
  background: var(--id-indigo);
  font-weight: 600;
}

.id-bottom-sheet {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: var(--id-white);
  border-top: 1px solid var(--id-indigo);
  z-index: 220;
  transform: translateY(100%);
  transition: transform .3s;
  max-height: 60vh;
  border-radius: 16px 16px 0 0;
  box-shadow: 0 -8px 32px rgba(15,23,42,.1);
}
.id-bottom-sheet.active { transform: translateY(0); }
.id-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--id-line);
}
.id-sheet-head h4 {
  margin: 0;
  font-family: var(--id-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--id-ink);
}
.id-sheet-head button {
  width: 32px; height: 32px;
  background: var(--id-bg);
  border: 1px solid var(--id-line);
  color: var(--id-text);
  font-size: 18px;
  cursor: pointer;
  border-radius: 8px;
}
.id-sheet-body { padding: 24px; }

.id-opt-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--id-line);
}
.id-opt-row:last-child { border-bottom: none; }
.id-opt-row > span {
  color: var(--id-ink);
  font-size: 14px;
  font-weight: 600;
}
.id-opt-btns { display: flex; gap: 4px; border: 1px solid var(--id-line); border-radius: 6px; overflow: hidden; }
.id-opt-btns button {
  min-width: 44px;
  height: 36px;
  background: var(--id-white);
  border: none;
  border-right: 1px solid var(--id-line);
  color: var(--id-text-soft);
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
  font-weight: 500;
}
.id-opt-btns button:last-child { border-right: none; }
.id-opt-btns button:hover { color: var(--id-indigo); }
.id-opt-btns button.active { background: var(--id-indigo); color: var(--id-white); }

.id-theme-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.id-theme-item {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent !important;
  border-radius: 8px;
  transition: all .15s;
}
.id-theme-item:hover { transform: scale(1.05); }
.id-theme-item.active {
  border-color: var(--id-indigo) !important;
  outline: 2px solid var(--id-indigo-bg);
  outline-offset: 2px;
}

/* Chapter themes via data-theme (outer section + article both get attribute) */
.id-reader-section { background: var(--id-white); padding: 60px 0; }
.id-reader { background: var(--id-white); }

.id-reader-section[data-theme="sepia"] { background: #f4ede0; }
.id-reader[data-theme="sepia"] { background: #f4ede0; }
.id-reader[data-theme="sepia"] .id-reader-body { color: #2a1f10; }

.id-reader-section[data-theme="light"] { background: #faf8f3; }
.id-reader[data-theme="light"] { background: #faf8f3; }
.id-reader[data-theme="light"] .id-reader-body { color: #1a1a1a; }

.id-reader-section[data-theme="green"] { background: #e8e8d8; }
.id-reader[data-theme="green"] { background: #e8e8d8; }
.id-reader[data-theme="green"] .id-reader-body { color: #1a2a1a; }

.id-reader-section[data-theme="dark"] { background: #0f172a; }
.id-reader[data-theme="dark"] { background: #0f172a; }
.id-reader[data-theme="dark"] .id-reader-body { color: #cbd5e1; }
.id-reader[data-theme="dark"] .id-reader-title { color: #ffffff; }
.id-reader[data-theme="dark"] .id-reader-meta { color: #94a3b8; }
.id-reader[data-theme="dark"] .id-reader-page a,
.id-reader[data-theme="dark"] .id-reader-page span { color: #cbd5e1; border-color: #334155; background: #1e293b; }
.id-reader[data-theme="dark"] .id-reader-page .id-reader-mulu { color: var(--id-amber); border-color: var(--id-amber); }
.id-reader-section[data-theme="dark"] .id-progress { background: var(--id-amber); }
.id-reader[data-theme="dark"] .id-detail-excerpt::after,
.id-reader[data-theme="dark"] .id-detail-desc::after { background: linear-gradient(180deg, transparent, #0f172a); }
.id-reader[data-theme="dark"] .id-detail-desc { color: #cbd5e1; }
.id-reader[data-theme="dark"] .id-detail-h1 { color: #ffffff; }
.id-reader[data-theme="dark"] .id-detail-meta { color: #94a3b8; border-color: #334155; }
.id-reader[data-theme="dark"] .id-detail-meta strong { color: #ffffff; }
.id-reader[data-theme="dark"] .id-detail-latest { color: #94a3b8; border-color: #334155; }
.id-reader[data-theme="dark"] .id-detail-latest a { color: var(--id-amber); }

/* Shelf blocks: default hidden, is-active shown */
.id-shelf-block { display: none; }
.id-shelf-block.is-active { display: block; }

.id-reader-page {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 40px;
  margin-top: 40px;
  border-top: 1px solid var(--id-line);
  gap: 16px;
}
.id-reader-page a, .id-reader-page span {
  display: inline-block;
  padding: 12px 22px;
  background: var(--id-white);
  border: 1px solid var(--id-indigo);
  color: var(--id-indigo);
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  transition: all .15s;
}
.id-reader-page a:hover { background: var(--id-indigo); color: var(--id-white); }
.id-reader-page .id-reader-mulu { color: var(--id-amber); border-color: var(--id-amber); }
.id-reader-page .id-reader-mulu:hover { background: var(--id-amber); }

/* ============================================================
   SEARCH
   ============================================================ */

.id-search-hero {
  text-align: center;
  padding: 80px 0 50px;
  background: var(--id-bg);
  border-bottom: 1px solid var(--id-line);
}
.id-search-h {
  font-family: var(--id-display);
  font-size: 44px;
  font-weight: 600;
  color: var(--id-ink);
  letter-spacing: -1px;
  margin: 0 0 12px;
}
.id-search-sub { color: var(--id-text-soft); font-size: 16px; }

.id-search-form {
  max-width: 600px;
  margin: 30px auto 0;
  display: flex;
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--id-shadow);
}
.id-search-form input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 16px 20px;
  color: var(--id-ink);
  font-family: var(--id-body);
  font-size: 16px;
  outline: none;
}
.id-search-form input::placeholder { color: var(--id-text-dim); }
.id-search-form button {
  padding: 0 28px;
  background: var(--id-indigo);
  color: var(--id-white);
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.id-search-form button:hover { background: var(--id-indigo-2); }

.id-search-tags {
  list-style: none;
  padding: 20px 0 0;
  margin: 20px auto 0;
  max-width: 600px;
  text-align: center;
  font-size: 13px;
  border-top: 1px solid var(--id-line);
}
.id-search-tags li { display: inline-block; margin: 4px; }
.id-search-tags a {
  color: var(--id-text);
  padding: 4px 12px;
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 14px;
}
.id-search-tags a:hover { background: var(--id-indigo); color: var(--id-white); border-color: var(--id-indigo); }

.id-search-results { padding: 40px 0 80px; }
.id-search-status {
  color: var(--id-text-soft);
  font-size: 14px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--id-line);
}
.id-search-status strong { color: var(--id-ink); font-weight: 600; }

.id-search-empty {
  text-align: center;
  padding: 60px 0;
  color: var(--id-text-soft);
}
.id-search-empty img { margin: 0 auto 16px; opacity: .5; }

/* ============================================================
   SITEMAP
   ============================================================ */

.id-sitemap { padding: 40px 0 80px; }
.id-sitemap-block {
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 20px;
}
.id-sitemap-h {
  font-family: var(--id-display);
  font-size: 24px;
  color: var(--id-ink);
  letter-spacing: -0.3px;
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--id-line);
  font-weight: 600;
}
.id-sitemap-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}
.id-sitemap-list a {
  color: var(--id-text);
  font-size: 14px;
  padding: 4px 0;
}
.id-sitemap-list a:hover { color: var(--id-indigo); }

/* ============================================================
   FRIEND LINK REQUEST
   ============================================================ */

.id-flreq { padding: 60px 0; }
.id-flreq-card {
  max-width: 540px;
  margin: 0 auto;
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 16px;
  padding: 40px;
  box-shadow: var(--id-shadow);
}
.id-flreq-h {
  font-family: var(--id-display);
  font-size: 28px;
  color: var(--id-ink);
  letter-spacing: -0.5px;
  margin: 0 0 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--id-line);
  font-weight: 600;
}
.id-flreq label {
  display: block;
  color: var(--id-text-soft);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.id-flreq .mb-3 { margin-bottom: 20px; }
.id-flreq input, .id-flreq textarea {
  width: 100%;
  background: var(--id-bg);
  border: 1px solid var(--id-line);
  color: var(--id-ink);
  padding: 12px 14px;
  font-family: var(--id-body);
  font-size: 14px;
  border-radius: 8px;
  outline: none;
  transition: all .15s;
}
.id-flreq input:focus, .id-flreq textarea:focus {
  background: var(--id-white);
  border-color: var(--id-indigo);
  box-shadow: 0 0 0 3px var(--id-indigo-bg);
}
.id-flreq button {
  display: block;
  width: 100%;
  padding: 14px 32px;
  background: var(--id-indigo);
  color: var(--id-white);
  border: none;
  font-size: 14px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 16px;
  transition: all .15s;
  box-shadow: 0 4px 12px rgba(79,70,229,.3);
}
.id-flreq button:hover { background: var(--id-indigo-2); transform: translateY(-2px); }

.id-flreq #friendLinkMsgModal .modal-content { background: var(--id-white); color: var(--id-text); border-radius: 12px; border: none; }
.id-flreq #friendLinkMsgModal .modal-header { border-bottom: 1px solid var(--id-line); }
.id-flreq #friendLinkMsgModal .modal-title { color: var(--id-ink); font-family: var(--id-display); font-weight: 600; }

/* ============================================================
   BOOK LIST (mini)
   ============================================================ */

.id-book-mini {
  display: flex;
  gap: 14px;
  padding: 14px;
  background: var(--id-white);
  border: 1px solid var(--id-line);
  border-radius: 10px;
  margin-bottom: 12px;
  text-decoration: none;
  color: var(--id-ink);
  transition: all .15s;
}
.id-book-mini:hover { border-color: var(--id-indigo-soft); box-shadow: var(--id-shadow); }
.id-book-mini:hover .id-book-mini-h { color: var(--id-indigo); }
.id-book-mini-cover {
  width: 60px; height: 80px;
  flex-shrink: 0;
  background: var(--id-bg);
  overflow: hidden;
  border-radius: 6px;
}
.id-book-mini-cover img { width: 100%; height: 100%; object-fit: cover; }
.id-book-mini-body { flex: 1; min-width: 0; }
.id-book-mini-h {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .15s;
}
.id-book-mini-meta { font-size: 12px; color: var(--id-text-soft); margin-bottom: 4px; }
.id-book-mini-desc {
  font-size: 13px;
  color: var(--id-text-soft);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   FOOTER
   ============================================================ */

.id-footer {
  background: var(--id-bg);
  padding: 60px 0 30px;
  border-top: 1px solid var(--id-line);
  color: var(--id-text-soft);
  font-size: 13px;
}
.id-footer-top {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--id-line);
}
.id-footer-brand {
  font-family: var(--id-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--id-ink);
  letter-spacing: -0.3px;
  display: inline-block;
  margin-bottom: 8px;
}
.id-footer-tag { color: var(--id-text-soft); font-size: 13px; margin: 0; }

.id-footer-meta { text-align: center; line-height: 2; }
.id-footer-row { color: var(--id-text-soft); }
.id-footer-row a, .id-footer-row span { color: var(--id-text-soft); }
.id-footer-row a { margin: 0 8px; }
.id-footer-row a:hover { color: var(--id-indigo); }
.id-footer-row-sub { font-size: 12px; color: var(--id-text-dim); margin-top: 6px; }
.id-footer-row-sub span { margin: 0 8px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1100px) {
  .id-hero-slide { grid-template-columns: 1.1fr 1fr; gap: 40px; }
  .id-hero-h1 { font-size: 56px; min-height: 118px; }
  .id-grid-list { grid-template-columns: repeat(4, 1fr); }
  .id-feature-item { grid-template-columns: 160px 1fr; gap: 24px; padding: 16px; }
  .id-feature-img { width: 160px; height: 213px; }
  .id-stats-grid { grid-template-columns: 1fr; }
  .id-new-grid { grid-template-columns: repeat(4, 1fr); }
  .id-shelf-grid { grid-template-columns: repeat(4, 1fr); }
  .id-detail-inner { grid-template-columns: 220px 1fr; gap: 40px; }
  .id-detail-h1 { font-size: 36px; }
  .id-chapter-grid { grid-template-columns: repeat(3, 1fr); }
  .id-reader-inner { padding: 0 30px; }
}

@media (max-width: 768px) {
  body { font-size: 14px; }
  .id-header-inner { height: 56px; gap: 16px; }
  .id-header-nav { display: none; }
  .id-header-burger { display: flex; }
  .id-header-search { padding: 6px 10px; }
  .id-header-search span { display: none; }
  .id-header-logo { font-size: 18px; }

  .id-section { padding: 60px 0; }
  .id-section-title { font-size: 26px; letter-spacing: -0.3px; }
  .id-section-title::before { width: 3px; height: 26px; }
  .id-section-en { display: none; }
  .id-section-tag { display: none; }

  .id-hero { min-height: 800px; padding: 40px 0; }
  .id-hero-slide { grid-template-columns: 1fr; gap: 24px; }
  .id-hero-h1 { font-size: 40px; letter-spacing: -1px; min-height: 84px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .id-hero-text { text-align: center; min-height: 260px; display: flex; flex-direction: column; justify-content: center; }
  .id-hero-img-wrap { max-width: 280px; margin: 0 auto; }

  .id-grid-list { grid-template-columns: repeat(3, 1fr); gap: 14px; }

  .id-feature-item { grid-template-columns: 100px 1fr; gap: 16px; padding: 14px; }
  .id-feature-img { width: 100px; height: 133px; }
  .id-feature-h { font-size: 20px; }
  .id-feature-desc { display: none; }

  .id-stats-no { font-size: 28px; min-width: 50px; }

  .id-new-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }

  .id-shelf-tabs { flex-wrap: wrap; gap: 4px 0; }
  .id-shelf-tab { padding: 10px 14px; font-size: 13px; white-space: nowrap; }
  .id-shelf-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; row-gap: 20px; }

  .id-detail-inner { grid-template-columns: 1fr; gap: 24px; }
  .id-detail-cover { max-width: 200px; margin: 0 auto; }
  .id-detail-h1 { font-size: 30px; }
  .id-detail-tab { padding: 40px 0; }
  .id-chapter-grid { grid-template-columns: repeat(2, 1fr); }

  .id-reader-inner { padding: 0 16px; }
  .id-reader-h { margin-bottom: 28px; padding-bottom: 20px; }
  .id-reader-title { font-size: 26px; }
  .id-reader-body { font-size: 16px; line-height: 1.85; }
  .id-tb { right: 12px; bottom: 12px; gap: 6px; }
  .id-tb-btn { width: 42px; height: 42px; font-size: 10px; }
  .id-tb-btn span { font-size: 14px; }
  .id-read-drawer { width: 280px; }
  .id-theme-grid { grid-template-columns: repeat(2, 1fr); }

  .id-search-h { font-size: 30px; }
  .id-search-form { flex-direction: column; }
  .id-search-form input { border-bottom: 1px solid var(--id-line); }
  .id-search-form button { padding: 14px; }

  .id-book-mini-cover { width: 50px; height: 70px; }
  .id-book-mini-h { font-size: 14px; }
  .id-book-mini-desc { display: none; }
}

@media (max-width: 480px) {
  .id-grid-list { grid-template-columns: repeat(2, 1fr); }
  .id-new-grid { grid-template-columns: repeat(2, 1fr); }
  .id-shelf-grid { grid-template-columns: repeat(2, 1fr); row-gap: 16px; }
  .id-chapter-grid { grid-template-columns: 1fr; }
  .id-feature-item { grid-template-columns: 80px 1fr; }
  .id-feature-img { width: 80px; height: 107px; }
  .id-feature-h { font-size: 17px; }
  .id-shelf-block-head { flex-wrap: wrap; padding: 14px 16px; gap: 8px; }
  .id-shelf-block-title { font-size: 18px; flex: 1 0 100%; order: 2; }
  .id-shelf-block-num { order: 1; }
  .id-shelf-block-meta { order: 3; }
}