/* ============================================================
   灵动Nexus · 学习与知识库（learn.html）
   深空玻璃拟态基底（继承 variables.css 设计令牌），
   学习平台专属视觉：程序化艺术封面、沉浸式阅读排版、词汇朗读卡。
   ============================================================ */

.ln-body {
  min-height: 100vh;
  background:
    radial-gradient(1100px 520px at 88% -10%, rgba(52, 211, 153, 0.14), transparent 60%),
    radial-gradient(900px 480px at -10% 18%, rgba(0, 229, 255, 0.12), transparent 55%),
    radial-gradient(760px 520px at 50% 112%, rgba(139, 92, 246, 0.14), transparent 62%),
    var(--bg-0);
  color: var(--tx-1);
  font-family: var(--font-ui);
  overflow-x: hidden;
}

.ln-body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1.5px 1.5px at 10% 24%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 32% 66%, rgba(155, 232, 255, 0.45), transparent),
    radial-gradient(1.5px 1.5px at 58% 10%, rgba(255, 255, 255, 0.38), transparent),
    radial-gradient(1px 1px at 74% 42%, rgba(199, 255, 232, 0.45), transparent),
    radial-gradient(1.2px 1.2px at 90% 76%, rgba(255, 255, 255, 0.42), transparent),
    radial-gradient(1px 1px at 20% 90%, rgba(155, 232, 255, 0.32), transparent);
  opacity: 0.8;
}

.i { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.i-sm { width: 14px; height: 14px; }
.hidden { display: none !important; }

/* ---------------- 顶栏（对齐游戏世界 gw-* 视觉） ---------------- */
.ln-topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding: 0 var(--sp-5);
  height: 64px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line-2);
}

.ln-brand { display: flex; align-items: center; gap: var(--sp-3); text-decoration: none; color: var(--tx-1); }
.ln-logo-orb {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, #34d399, #38bdf8 55%, #8b5cf6);
  color: var(--tx-on-neon);
  box-shadow: 0 6px 28px rgba(56, 189, 248, 0.35);
}
.ln-brand-tx { display: flex; flex-direction: column; line-height: 1.15; }
.ln-brand-title { font-weight: 700; font-size: var(--fs-md); }
.ln-brand-sub { font-size: 10px; letter-spacing: 0.18em; color: var(--tx-3); }

.ln-tabs { display: flex; gap: var(--sp-1); flex: 1; justify-content: center; align-items: center; }
.ln-tabs button {
  border: 1px solid transparent;
  background: transparent;
  color: var(--tx-2);
  font-size: var(--fs-md);
  padding: 8px 18px;
  border-radius: var(--r-full);
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.ln-tabs button:hover { color: var(--tx-1); background: var(--bg-3); }
.ln-tabs button.active {
  color: var(--tx-on-neon);
  background: linear-gradient(135deg, #34d399, #38bdf8 60%, #4f7cff);
  box-shadow: 0 6px 28px rgba(56, 189, 248, 0.35);
  font-weight: 600;
}
.ln-tab-home {
  display: inline-flex; align-items: center; gap: 4px; flex: none;
  color: var(--tx-2); text-decoration: none; font-size: var(--fs-md);
  padding: 8px 14px; border-radius: var(--r-full); border: 1px solid var(--line-2);
  transition: all var(--t-fast) var(--ease);
}
.ln-tab-home:hover { color: var(--tx-1); border-color: var(--line-glow); }

.ln-me { display: flex; align-items: center; gap: var(--sp-3); }

/* 会员徽章（色调与游戏世界 gw-vip 对齐） */
.ln-vip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 12px; border-radius: var(--r-full);
  font-size: var(--fs-xs); font-weight: 700; text-decoration: none; white-space: nowrap;
  border: 1px solid transparent;
  transition: transform var(--t-fast) var(--ease), filter var(--t-fast) var(--ease);
}
.ln-vip:hover { transform: translateY(-1px); filter: brightness(1.08); }
.ln-vip[hidden] { display: none; }
.ln-vip.tier-none { background: var(--bg-3); color: var(--tx-3); border-style: dashed; border-color: var(--line-2); }
.ln-vip.tier-lite { background: linear-gradient(135deg, #2bb3c0, #5ce1e6); color: #06333a; box-shadow: 0 0 10px rgba(92, 225, 230, 0.35); }
.ln-vip.tier-pro { background: linear-gradient(135deg, #4f7cff, #7aa2ff); color: #fff; box-shadow: 0 0 12px rgba(79, 124, 255, 0.45); }
.ln-vip.tier-max { background: linear-gradient(135deg, #8b5cf6, #d946ef); color: #fff; box-shadow: 0 0 14px rgba(155, 124, 255, 0.5); }
.ln-vip.tier-ultra { background: linear-gradient(135deg, #f5a623, #ffc857); color: #2a1a05; box-shadow: 0 0 16px rgba(255, 200, 87, 0.55); }
.ln-vip.tier-prestige { background: linear-gradient(135deg, #ff7ab8, #ffc857, #ff9a5c); color: #33110a; box-shadow: 0 0 20px rgba(255, 143, 184, 0.6); position: relative; overflow: hidden; }
.ln-vip.tier-prestige::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.55) 50%, transparent 70%);
  transform: translateX(-120%); animation: lnBadgeShine 2.6s ease-in-out infinite;
}
@keyframes lnBadgeShine { 0% { transform: translateX(-120%); } 60%, 100% { transform: translateX(120%); } }

.ln-avatar-btn {
  border: none; background: transparent; padding: 2px; cursor: pointer;
  border-radius: 50%; display: grid; place-items: center;
  transition: box-shadow var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.ln-avatar-btn:hover { box-shadow: 0 0 0 2px var(--line-glow); transform: translateY(-1px); }
.ln-avatar { display: inline-grid; place-items: center; border-radius: 50%; color: #fff; font-weight: 700; overflow: hidden; flex: none; }
.ln-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

/* 头像下拉菜单 */
.ln-dd {
  position: fixed; z-index: var(--z-dropdown); min-width: 200px;
  display: flex; flex-direction: column; padding: 6px;
  border-radius: var(--r-lg); border: 1px solid var(--line-2);
  background: var(--bg-glass-strong); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-2);
  opacity: 0; transform: translateY(-6px);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.ln-dd.show { opacity: 1; transform: none; }
.ln-dd-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 10px; border: none; background: transparent; color: var(--tx-1);
  font-size: var(--fs-sm); border-radius: var(--r-md); cursor: pointer; text-align: left;
  transition: background var(--t-fast) var(--ease);
}
.ln-dd-item:hover { background: var(--bg-3); }
.ln-dd-item.danger { color: var(--danger); }
.ln-dd-i { display: inline-grid; place-items: center; width: 22px; height: 22px; color: var(--tx-3); flex: none; }
.ln-dd-i .i { width: 16px; height: 16px; }
.ln-dd-item.danger .ln-dd-i { color: inherit; }
.ln-dd-sep { height: 1px; margin: 5px 8px; background: var(--line-2); }

/* ---------------- 主视图 ---------------- */
.ln-view { max-width: 1180px; margin: 0 auto; padding: var(--sp-6) var(--sp-5) 90px; position: relative; }

/* ---------------- Hero ---------------- */
.ln-hero {
  position: relative; overflow: hidden;
  display: flex; align-items: center;
  min-height: 380px;
  padding: 56px 64px;
  border: 1px solid var(--line-2);
  border-radius: 32px;
  background:
    linear-gradient(125deg, rgba(52, 211, 153, 0.14), rgba(16, 20, 43, 0.94) 46%, rgba(79, 124, 255, 0.12)),
    var(--bg-1);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.24);
}
.ln-hero::after {
  content: ''; position: absolute; right: -120px; bottom: -180px;
  width: 400px; height: 400px; border-radius: 50%;
  background: rgba(56, 189, 248, 0.10); filter: blur(6px);
}
.ln-hero-copy { position: relative; z-index: 2; max-width: 700px; }
.ln-eyebrow { color: #6ee7b7; font-size: 12px; font-weight: 800; letter-spacing: 0.17em; }
.ln-hero h1 { margin: 18px 0; font-size: clamp(36px, 5.4vw, 64px); line-height: 1.1; letter-spacing: -0.04em; }
.ln-hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #6ee7b7, #67e8f9 55%, #c4b5fd);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ln-hero p { max-width: 600px; color: var(--tx-2); font-size: 16px; line-height: 1.85; }

.ln-search {
  display: flex; align-items: center; gap: 10px;
  margin-top: 26px; max-width: 560px;
  padding: 6px 6px 6px 16px;
  border: 1px solid var(--line-2); border-radius: var(--r-full);
  background: rgba(10, 13, 31, 0.66);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.ln-search:focus-within { border-color: var(--line-glow); box-shadow: var(--glow-cyan); }
.ln-search .i { color: var(--tx-3); flex: none; }
.ln-search input {
  flex: 1; min-width: 0; border: none; outline: none; background: transparent;
  color: var(--tx-1); font-size: var(--fs-md);
}
.ln-search input::placeholder { color: var(--tx-3); }
.ln-search button {
  flex: none; border: none; cursor: pointer;
  padding: 10px 22px; border-radius: var(--r-full);
  font-weight: 700; color: var(--tx-on-neon);
  background: linear-gradient(135deg, #34d399, #38bdf8 60%, #4f7cff);
  transition: filter var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.ln-search button:hover { filter: brightness(1.1); transform: translateY(-1px); }

.ln-hero-stats { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.ln-hero-stats .stat-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px; border-radius: var(--r-full);
  border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.04);
  color: var(--tx-2); font-size: var(--fs-sm);
}
.ln-hero-stats .stat-chip b { color: #6ee7b7; font-size: 15px; }
.ln-hero-stats .stat-chip .i { width: 15px; height: 15px; color: #67e8f9; }

/* Hero 右侧艺术装置：环绕轨道图标 */
.ln-hero-art { position: absolute; right: 64px; top: 50%; transform: translateY(-50%); width: 240px; height: 240px; z-index: 1; }
.ln-hero-core {
  position: absolute; inset: 70px;
  display: grid; place-items: center;
  border-radius: 34px;
  background: linear-gradient(145deg, #34d399, #38bdf8 55%, #8b5cf6);
  color: var(--tx-on-neon);
  box-shadow: 0 0 70px rgba(56, 189, 248, 0.45);
  animation: lnFloatY 5.5s ease-in-out infinite;
}
.ln-hero-core .i { width: 52px; height: 52px; }
.ln-orbit {
  position: absolute;
  width: 54px; height: 54px;
  display: grid; place-items: center;
  border-radius: 17px;
  border: 1px solid var(--line-2);
  background: var(--bg-glass);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  color: #67e8f9;
  box-shadow: var(--shadow-1);
  animation: lnFloatY 6s ease-in-out infinite;
}
.ln-orbit .i { width: 24px; height: 24px; }
.ln-orbit-1 { top: 0; left: 24px; color: #6ee7b7; animation-delay: 0.6s; }
.ln-orbit-2 { bottom: 8px; right: 0; color: #c4b5fd; animation-delay: 1.3s; }
.ln-orbit-3 { bottom: 34px; left: -10px; color: #fcd34d; animation-delay: 2s; }
@keyframes lnFloatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* ---------------- 板块标题 ---------------- */
.ln-section { margin-top: 60px; }
.ln-section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.ln-section-head .kicker { color: #6ee7b7; font-size: 12px; font-weight: 800; letter-spacing: 0.17em; }
.ln-section-head.wiki .kicker { color: #c4b5fd; }
.ln-section-head h2 { margin: 8px 0 0; font-size: 30px; letter-spacing: -0.02em; }
.ln-section-head p { color: var(--tx-2); max-width: 460px; line-height: 1.8; margin: 0; text-align: right; }

/* ---------------- 大类卡片（程序化艺术封面） ---------------- */
.ln-catgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.ln-catgrid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ln-catcard {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
  min-height: 300px;
  border: 1px solid var(--line-1); border-radius: 26px;
  background: var(--bg-2);
  cursor: pointer;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.ln-catcard:hover { transform: translateY(-6px); border-color: var(--line-glow); box-shadow: 0 26px 60px rgba(0, 0, 0, 0.35); }
.ln-catcard:focus-visible { outline: 2px solid var(--neon-cyan); outline-offset: 2px; }

.ln-art {
  position: relative; height: 148px; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.ln-art .ln-art-icon {
  position: relative; z-index: 2;
  width: 66px; height: 66px;
  display: grid; place-items: center;
  border-radius: 20px;
  background: rgba(4, 10, 24, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  transition: transform var(--t-mid) var(--ease);
}
.ln-catcard:hover .ln-art-icon { transform: scale(1.08) rotate(-4deg); }
.ln-art .ln-art-icon .i { width: 32px; height: 32px; }
.ln-art::before, .ln-art::after { content: ''; position: absolute; border-radius: 50%; }
.ln-art::before { width: 210px; height: 210px; right: -60px; top: -80px; background: rgba(255, 255, 255, 0.14); }
.ln-art::after { width: 130px; height: 130px; left: -40px; bottom: -60px; background: rgba(0, 0, 0, 0.14); }
.ln-art-dots {
  position: absolute; inset: 0; z-index: 1; opacity: 0.5;
  background-image: radial-gradient(rgba(255, 255, 255, 0.32) 1px, transparent 1.6px);
  background-size: 18px 18px;
  mask-image: linear-gradient(115deg, #000 0%, transparent 55%);
  -webkit-mask-image: linear-gradient(115deg, #000 0%, transparent 55%);
}

/* 各大类艺术封面配色 */
.art-lang { background: linear-gradient(130deg, #0ea5e9, #38bdf8 45%, #34d399); }
.art-code { background: linear-gradient(130deg, #4f7cff, #7c3aed 60%, #312e81); }
.art-ai { background: linear-gradient(130deg, #8b5cf6, #d946ef 55%, #f472b6); }
.art-med { background: linear-gradient(130deg, #f43f5e, #fb7185 50%, #fbbf24); }
.art-hum { background: linear-gradient(130deg, #f59e0b, #f97316 55%, #ef4444); }
.art-geo { background: linear-gradient(130deg, #10b981, #34d399 45%, #0ea5e9); }
.art-cnhis { background: linear-gradient(130deg, #dc2626, #f59e0b 60%, #facc15); }
.art-whis { background: linear-gradient(130deg, #6366f1, #8b5cf6 50%, #0ea5e9); }
.art-sci { background: linear-gradient(130deg, #06b6d4, #22d3ee 45%, #818cf8); }
.art-art { background: linear-gradient(130deg, #ec4899, #f472b6 45%, #fb923c); }
.art-nat { background: linear-gradient(130deg, #22c55e, #4ade80 45%, #a3e635); }
.art-default { background: linear-gradient(130deg, #4f7cff, #38bdf8); }

.ln-catcard-body { display: flex; flex-direction: column; flex: 1; padding: 22px 24px 24px; }
.ln-catcard-body h3 { margin: 0 0 8px; font-size: 21px; letter-spacing: -0.01em; }
.ln-catcard-body > p { flex: 1; margin: 0 0 16px; color: var(--tx-2); font-size: var(--fs-sm); line-height: 1.75; }
.ln-catcard-meta { display: flex; align-items: center; justify-content: space-between; color: var(--tx-3); font-size: var(--fs-xs); }
.ln-catcard-meta .go {
  display: inline-flex; align-items: center; gap: 5px;
  color: #6ee7b7; font-weight: 700; font-size: var(--fs-sm);
  transition: gap var(--t-fast) var(--ease);
}
.ln-catcard:hover .ln-catcard-meta .go { gap: 9px; }

/* ---------------- 面包屑 ---------------- */
.ln-crumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; color: var(--tx-3); font-size: var(--fs-sm); }
.ln-crumb button {
  border: none; background: transparent; color: var(--tx-2); cursor: pointer;
  padding: 4px 6px; border-radius: 6px; font-size: var(--fs-sm);
  transition: color var(--t-fast), background var(--t-fast);
}
.ln-crumb button:hover { color: var(--tx-1); background: var(--bg-3); }
.ln-crumb .sep { color: var(--tx-3); }
.ln-crumb .cur { color: var(--tx-1); font-weight: 600; padding: 4px 6px; }

/* ---------------- 大类页头 ---------------- */
.ln-cat-hero {
  position: relative; overflow: hidden;
  border-radius: 26px; border: 1px solid var(--line-1);
  padding: 40px 44px; margin-bottom: 28px;
  color: #fff;
}
.ln-cat-hero .ln-art-dots { opacity: 0.4; }
.ln-cat-hero-inner { position: relative; z-index: 2; display: flex; align-items: center; gap: 22px; }
.ln-cat-hero .hero-ic {
  width: 74px; height: 74px; flex: none;
  display: grid; place-items: center;
  border-radius: 22px;
  background: rgba(4, 10, 24, 0.34);
  border: 1px solid rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.ln-cat-hero .hero-ic .i { width: 36px; height: 36px; }
.ln-cat-hero h2 { margin: 0 0 8px; font-size: 32px; letter-spacing: -0.02em; }
.ln-cat-hero p { margin: 0; max-width: 640px; line-height: 1.8; color: rgba(255, 255, 255, 0.88); }
.ln-cat-hero .hero-stats { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.ln-cat-hero .hero-stats span {
  padding: 5px 12px; border-radius: var(--r-full); font-size: var(--fs-xs); font-weight: 600;
  background: rgba(4, 10, 24, 0.3); border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ---------------- 小类网格 ---------------- */
.ln-subgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.ln-subcard {
  position: relative; overflow: hidden;
  padding: 24px; min-height: 168px;
  display: flex; flex-direction: column;
  border: 1px solid var(--line-1); border-radius: 22px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)), var(--bg-2);
  cursor: pointer;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.ln-subcard:hover { transform: translateY(-5px); border-color: var(--line-glow); box-shadow: 0 22px 50px rgba(0, 0, 0, 0.3); }
.ln-subcard:focus-visible { outline: 2px solid var(--neon-cyan); outline-offset: 2px; }
.ln-subcard .sub-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.ln-subcard .sub-ic {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 15px; color: #fff;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.28);
}
.ln-subcard .sub-ic .i { width: 24px; height: 24px; }
.ln-subcard .sub-lang {
  padding: 4px 10px; border-radius: var(--r-full);
  font-size: 11px; font-weight: 700; letter-spacing: 0.04em;
  color: #67e8f9; background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.3);
}
.ln-subcard h3 { margin: 0 0 7px; font-size: 19px; }
.ln-subcard p { flex: 1; margin: 0 0 14px; color: var(--tx-2); font-size: var(--fs-sm); line-height: 1.7; }
.ln-subcard .sub-meta { display: flex; align-items: center; justify-content: space-between; color: var(--tx-3); font-size: var(--fs-xs); }
.ln-subcard .sub-meta .go { color: #6ee7b7; font-weight: 700; display: inline-flex; align-items: center; gap: 4px; }

/* ---------------- 小类页头 + 类型筛选 ---------------- */
.ln-sub-head { display: flex; align-items: center; gap: 20px; margin-bottom: 22px; padding: 26px 30px; border: 1px solid var(--line-1); border-radius: 22px; background: var(--bg-2); }
.ln-sub-head .sub-ic { width: 58px; height: 58px; flex: none; display: grid; place-items: center; border-radius: 17px; color: #fff; box-shadow: 0 8px 22px rgba(0, 0, 0, 0.28); }
.ln-sub-head .sub-ic .i { width: 28px; height: 28px; }
.ln-sub-head h2 { margin: 0 0 6px; font-size: 25px; }
.ln-sub-head p { margin: 0; color: var(--tx-2); font-size: var(--fs-sm); line-height: 1.7; }
.ln-sub-head .head-side { margin-left: auto; text-align: right; color: var(--tx-3); font-size: var(--fs-xs); line-height: 1.9; flex: none; }
.ln-sub-head .head-side b { color: #6ee7b7; font-size: 16px; }

.ln-kindbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.ln-kindbar button {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--r-full);
  border: 1px solid var(--line-2); background: transparent;
  color: var(--tx-2); font-size: var(--fs-sm); cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.ln-kindbar button:hover { color: var(--tx-1); border-color: var(--line-glow); }
.ln-kindbar button.active {
  color: var(--tx-on-neon); font-weight: 700; border-color: transparent;
  background: linear-gradient(135deg, #34d399, #38bdf8 60%, #4f7cff);
}
.ln-kindbar .cnt { font-size: 11px; opacity: 0.75; }

/* ---------------- 内容卡片列表 ---------------- */
.ln-itemlist { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.ln-itemcard {
  position: relative; overflow: hidden;
  display: flex; gap: 18px;
  padding: 20px 22px;
  border: 1px solid var(--line-1); border-radius: 20px;
  background: var(--bg-2);
  cursor: pointer;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.ln-itemcard:hover { transform: translateY(-4px); border-color: var(--line-glow); box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28); }
.ln-itemcard:focus-visible { outline: 2px solid var(--neon-cyan); outline-offset: 2px; }
.ln-itemcard .item-ic {
  width: 52px; height: 52px; flex: none;
  display: grid; place-items: center;
  border-radius: 15px; color: #fff;
}
.ln-itemcard .item-ic .i { width: 25px; height: 25px; }
.ln-itemcard .item-body { flex: 1; min-width: 0; }
.ln-itemcard h3 { margin: 1px 0 7px; font-size: 16.5px; line-height: 1.45; }
.ln-itemcard .item-summary {
  margin: 0 0 12px; color: var(--tx-2); font-size: var(--fs-sm); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.ln-itemcard .item-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 7px 14px; color: var(--tx-3); font-size: var(--fs-xs); }
.ln-itemcard .item-meta .m { display: inline-flex; align-items: center; gap: 5px; }
.ln-itemcard .item-meta .i { width: 13px; height: 13px; }
.ln-kind-badge { padding: 3px 9px; border-radius: var(--r-full); font-size: 11px; font-weight: 700; }
.kb-article { color: #67e8f9; background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.3); }
.kb-course { color: #6ee7b7; background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.32); }
.kb-vocab { color: #fcd34d; background: rgba(251, 191, 36, 0.12); border: 1px solid rgba(251, 191, 36, 0.32); }
.ln-lv-badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 9px; border-radius: var(--r-full); font-size: 11px; font-weight: 700; color: #fcd34d; background: rgba(251, 191, 36, 0.1); border: 1px solid rgba(251, 191, 36, 0.3); }
.ln-lv-badge .i { width: 11px; height: 11px; }
.ln-done-badge { display: inline-flex; align-items: center; gap: 4px; color: #6ee7b7; font-size: 11px; font-weight: 700; }
.ln-done-badge .i { width: 13px; height: 13px; }
.ln-itemcard.locked { opacity: 0.86; }
.ln-itemcard.locked:hover { border-color: rgba(251, 191, 36, 0.45); }
.ln-itemcard .lock-corner {
  position: absolute; top: 14px; right: 14px;
  width: 30px; height: 30px; display: grid; place-items: center;
  border-radius: 10px; color: #fcd34d;
  background: rgba(251, 191, 36, 0.12); border: 1px solid rgba(251, 191, 36, 0.3);
}
.ln-itemcard .lock-corner .i { width: 15px; height: 15px; }

/* ---------------- 阅读页 ---------------- */
.ln-reader-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; align-items: start; }
.ln-reader {
  border: 1px solid var(--line-1); border-radius: 26px;
  background: var(--bg-2);
  overflow: hidden;
}
.ln-reader-hero { position: relative; padding: 40px 44px 34px; color: #fff; overflow: hidden; }
.ln-reader-hero .ln-art-dots { opacity: 0.35; }
.ln-reader-hero-inner { position: relative; z-index: 2; }
.ln-reader-hero .rh-kind { display: inline-flex; align-items: center; gap: 6px; padding: 5px 13px; border-radius: var(--r-full); font-size: var(--fs-xs); font-weight: 700; background: rgba(4, 10, 24, 0.34); border: 1px solid rgba(255, 255, 255, 0.22); }
.ln-reader-hero h1 { margin: 16px 0 12px; font-size: clamp(26px, 3.4vw, 36px); line-height: 1.3; letter-spacing: -0.02em; }
.ln-reader-hero .rh-summary { margin: 0 0 18px; max-width: 640px; line-height: 1.8; color: rgba(255, 255, 255, 0.9); }
.ln-reader-hero .rh-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: var(--fs-xs); color: rgba(255, 255, 255, 0.82); }
.ln-reader-hero .rh-meta .m { display: inline-flex; align-items: center; gap: 5px; }
.ln-reader-hero .rh-meta .i { width: 13px; height: 13px; }

.ln-reader-body { padding: 38px 44px 46px; }
.ln-reader-body h2 { margin: 34px 0 14px; font-size: 24px; letter-spacing: -0.01em; padding-top: 8px; }
.ln-reader-body h2:first-child { margin-top: 0; }
.ln-reader-body h3 { margin: 26px 0 12px; font-size: 19px; color: #a5f3d0; }
.ln-reader-body p { margin: 14px 0; color: var(--tx-2); font-size: 15.5px; line-height: 1.95; }
.ln-reader-body ul { margin: 14px 0; padding-left: 4px; list-style: none; }
.ln-reader-body ul li {
  position: relative; margin: 10px 0; padding-left: 24px;
  color: var(--tx-2); font-size: 15px; line-height: 1.85;
}
.ln-reader-body ul li::before {
  content: ''; position: absolute; left: 4px; top: 11px;
  width: 7px; height: 7px; border-radius: 2px;
  background: linear-gradient(135deg, #34d399, #38bdf8);
  transform: rotate(45deg);
}
.ln-reader-body blockquote {
  margin: 20px 0; padding: 18px 22px;
  border-left: 3px solid #34d399;
  border-radius: 0 14px 14px 0;
  background: rgba(52, 211, 153, 0.07);
  color: #d7f5e8; font-size: 15.5px; line-height: 1.9; font-style: italic;
}
.ln-callout { display: flex; gap: 13px; margin: 18px 0; padding: 16px 18px; border-radius: 16px; border: 1px solid; }
.ln-callout .co-ic { flex: none; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 11px; }
.ln-callout .co-ic .i { width: 17px; height: 17px; }
.ln-callout p { margin: 0; font-size: 14px; line-height: 1.85; }
.ln-callout.tip { border-color: rgba(52, 211, 153, 0.32); background: rgba(52, 211, 153, 0.07); }
.ln-callout.tip .co-ic { color: #6ee7b7; background: rgba(52, 211, 153, 0.14); }
.ln-callout.tip p { color: #d7f5e8; }
.ln-callout.warn { border-color: rgba(251, 113, 133, 0.32); background: rgba(251, 113, 133, 0.07); }
.ln-callout.warn .co-ic { color: #fda4af; background: rgba(251, 113, 133, 0.14); }
.ln-callout.warn p { color: #ffe0e5; }
.ln-fact {
  display: flex; gap: 16px; align-items: flex-start;
  margin: 20px 0; padding: 18px 20px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(79, 124, 255, 0.14), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(124, 140, 255, 0.3);
}
.ln-fact .fact-label {
  flex: none; padding: 5px 12px; border-radius: var(--r-full);
  font-size: 11px; font-weight: 800; letter-spacing: 0.08em;
  color: #fff; background: linear-gradient(135deg, #4f7cff, #8b5cf6);
}
.ln-fact p { margin: 0; font-size: 14.5px; line-height: 1.85; color: #dde4ff; }
.ln-reader-body pre {
  margin: 18px 0; padding: 20px 22px; overflow-x: auto;
  border-radius: 16px; border: 1px solid var(--line-2);
  background: #070a18;
  font-family: var(--font-mono); font-size: 13.5px; line-height: 1.8; color: #c8e1ff;
}
.ln-table-wrap { margin: 18px 0; overflow-x: auto; border: 1px solid var(--line-2); border-radius: 16px; }
.ln-table-wrap table { width: 100%; border-collapse: collapse; font-size: 14px; }
.ln-table-wrap th {
  padding: 12px 16px; text-align: left; white-space: nowrap;
  background: rgba(52, 211, 153, 0.1); color: #6ee7b7; font-weight: 700;
  border-bottom: 1px solid var(--line-2);
}
.ln-table-wrap td { padding: 11px 16px; color: var(--tx-2); border-bottom: 1px solid var(--line-1); line-height: 1.7; }
.ln-table-wrap tr:last-child td { border-bottom: none; }
.ln-table-wrap tr:hover td { background: rgba(255, 255, 255, 0.025); }

/* 朗读块 */
.ln-speak {
  display: flex; align-items: center; gap: 14px;
  margin: 12px 0; padding: 14px 18px;
  border: 1px solid rgba(56, 189, 248, 0.28); border-radius: 16px;
  background: rgba(56, 189, 248, 0.06);
  transition: border-color var(--t-fast), background var(--t-fast);
}
.ln-speak.speaking { border-color: #38bdf8; background: rgba(56, 189, 248, 0.14); box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12); }
.ln-speak .sp-btn {
  flex: none; width: 42px; height: 42px;
  display: grid; place-items: center;
  border: none; border-radius: 50%; cursor: pointer;
  color: var(--tx-on-neon);
  background: linear-gradient(135deg, #38bdf8, #4f7cff);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.35);
  transition: transform var(--t-fast), filter var(--t-fast);
}
.ln-speak .sp-btn:hover { transform: scale(1.07); filter: brightness(1.1); }
.ln-speak .sp-btn .i { width: 19px; height: 19px; }
.ln-speak .sp-tx { flex: 1; min-width: 0; }
.ln-speak .sp-text { font-size: 16px; font-weight: 600; line-height: 1.6; }
.ln-speak .sp-trans { margin-top: 3px; color: var(--tx-3); font-size: var(--fs-sm); }
.ln-speak .sp-lang { flex: none; font-size: 10px; font-weight: 800; letter-spacing: 0.06em; color: #67e8f9; opacity: 0.8; }

/* ---------------- 词汇卡 ---------------- */
.ln-vocab-tools { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.ln-vocab-tools .vt-info { color: var(--tx-3); font-size: var(--fs-sm); margin-right: auto; }
.ln-btn-mini {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: var(--r-full);
  border: 1px solid var(--line-2); background: transparent;
  color: var(--tx-2); font-size: var(--fs-sm); cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.ln-btn-mini:hover { color: var(--tx-1); border-color: var(--line-glow); }
.ln-btn-mini.on { color: var(--tx-on-neon); font-weight: 700; border-color: transparent; background: linear-gradient(135deg, #38bdf8, #4f7cff); }
.ln-btn-mini .i { width: 14px; height: 14px; }

.ln-vocab-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.ln-word {
  position: relative;
  padding: 18px 20px;
  border: 1px solid var(--line-1); border-radius: 18px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}
.ln-word:hover { border-color: rgba(56, 189, 248, 0.4); transform: translateY(-2px); }
.ln-word.speaking { border-color: #38bdf8; box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12); }
.ln-word .w-top { display: flex; align-items: center; gap: 12px; }
.ln-word .w-main { flex: 1; min-width: 0; }
.ln-word .w-word { font-size: 20px; font-weight: 800; letter-spacing: 0.01em; }
.ln-word .w-phon { margin-left: 8px; color: #67e8f9; font-size: 13px; font-family: var(--font-mono); }
.ln-word .w-pos { color: var(--tx-3); font-size: var(--fs-xs); font-style: italic; margin-left: 6px; }
.ln-word .w-mean { margin-top: 7px; color: var(--tx-1); font-size: 14.5px; line-height: 1.6; }
.ln-word .w-ex { margin-top: 9px; padding-top: 9px; border-top: 1px dashed var(--line-2); font-size: 13px; line-height: 1.7; color: var(--tx-2); }
.ln-word .w-ex-trans { color: var(--tx-3); }
.ln-word .w-btn {
  flex: none; width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid rgba(56, 189, 248, 0.35); border-radius: 50%;
  background: rgba(56, 189, 248, 0.08); color: #67e8f9; cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.ln-word .w-btn:hover { background: rgba(56, 189, 248, 0.2); transform: scale(1.06); }
.ln-word .w-btn .i { width: 17px; height: 17px; }
.ln-word.hide-ex .w-ex { display: none; }
.ln-vocab-outro { margin-top: 24px; }

/* ---------------- 阅读页侧栏 ---------------- */
.ln-reader-side { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 16px; }
.ln-side-card { border: 1px solid var(--line-1); border-radius: 20px; background: var(--bg-2); padding: 20px; }
.ln-side-card h4 { margin: 0 0 14px; font-size: var(--fs-sm); color: var(--tx-3); font-weight: 700; letter-spacing: 0.06em; }
.ln-progress-btn {
  width: 100%; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 18px; border: none; border-radius: 14px; cursor: pointer;
  font-weight: 800; font-size: var(--fs-md); color: var(--tx-on-neon);
  background: linear-gradient(135deg, #34d399, #38bdf8 60%, #4f7cff);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.3);
  transition: filter var(--t-fast), transform var(--t-fast);
}
.ln-progress-btn:hover { filter: brightness(1.1); transform: translateY(-1px); }
.ln-progress-btn.done { background: var(--bg-3); color: #6ee7b7; border: 1px solid rgba(52, 211, 153, 0.4); box-shadow: none; }
.ln-progress-btn .i { width: 17px; height: 17px; }
.ln-side-note { margin-top: 10px; color: var(--tx-3); font-size: var(--fs-xs); line-height: 1.7; text-align: center; }
.ln-sibling {
  display: flex; align-items: center; gap: 11px;
  padding: 10px; margin: 0 -6px; border-radius: 12px; cursor: pointer;
  transition: background var(--t-fast);
}
.ln-sibling:hover { background: var(--bg-3); }
.ln-sibling .sb-ic { flex: none; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; color: #fff; }
.ln-sibling .sb-ic .i { width: 16px; height: 16px; }
.ln-sibling .sb-tx { flex: 1; min-width: 0; }
.ln-sibling .sb-title { font-size: var(--fs-sm); line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ln-sibling .sb-meta { margin-top: 3px; font-size: 11px; color: var(--tx-3); display: flex; gap: 8px; }
.ln-sibling .sb-lock { color: #fcd34d; }
.ln-sibling .sb-lock .i { width: 11px; height: 11px; }

/* ---------------- 我的学习 ---------------- */
.ln-my-hero { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 28px; }
.ln-my-stat {
  position: relative; overflow: hidden;
  padding: 22px; border: 1px solid var(--line-1); border-radius: 20px; background: var(--bg-2);
}
.ln-my-stat .ms-ic { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: #fff; margin-bottom: 14px; }
.ln-my-stat .ms-ic .i { width: 20px; height: 20px; }
.ln-my-stat b { display: block; font-size: 30px; letter-spacing: -0.02em; }
.ln-my-stat span { color: var(--tx-3); font-size: var(--fs-sm); }
.ln-my-section { margin-top: 34px; }
.ln-my-section h3 { display: flex; align-items: center; gap: 9px; margin: 0 0 16px; font-size: 19px; }
.ln-my-section h3 .i { color: #67e8f9; }
.ln-hist-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; margin-bottom: 10px;
  border: 1px solid var(--line-1); border-radius: 16px; background: var(--bg-2);
  cursor: pointer; transition: border-color var(--t-fast), background var(--t-fast);
}
.ln-hist-item:hover { border-color: var(--line-glow); background: var(--bg-3); }
.ln-hist-item .h-ic { flex: none; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: #fff; }
.ln-hist-item .h-ic .i { width: 19px; height: 19px; }
.ln-hist-item .h-tx { flex: 1; min-width: 0; }
.ln-hist-item .h-title { font-size: var(--fs-md); line-height: 1.5; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ln-hist-item .h-meta { margin-top: 3px; font-size: var(--fs-xs); color: var(--tx-3); display: flex; gap: 10px; }
.ln-hist-item .h-state { flex: none; font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: var(--r-full); }
.h-state.done { color: #6ee7b7; background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.3); }
.h-state.reading { color: #67e8f9; background: rgba(34, 211, 238, 0.1); border: 1px solid rgba(34, 211, 238, 0.28); }

.ln-empty { padding: 64px 24px; border: 1px dashed var(--line-2); border-radius: 22px; text-align: center; color: var(--tx-2); }
.ln-empty .e-ic { width: 62px; height: 62px; margin: 0 auto 16px; display: grid; place-items: center; border-radius: 19px; background: var(--grad-brand-soft); color: #67e8f9; }
.ln-empty .e-ic .i { width: 28px; height: 28px; }
.ln-empty h3 { margin: 0 0 8px; color: var(--tx-1); }
.ln-empty p { margin: 0 0 18px; line-height: 1.8; font-size: var(--fs-sm); }
.ln-empty .ln-btn-primary { display: inline-flex; }

.ln-guest-cta {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 28px 32px; border: 1px dashed var(--line-2); border-radius: 22px;
  background: rgba(16, 20, 43, 0.6);
}
.ln-guest-cta h3 { margin: 0 0 8px; }
.ln-guest-cta p { margin: 0; color: var(--tx-2); font-size: var(--fs-sm); line-height: 1.7; }

/* ---------------- 按钮 ---------------- */
.ln-btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 11px 24px; border: none; border-radius: var(--r-full); cursor: pointer;
  font-weight: 800; font-size: var(--fs-md); color: var(--tx-on-neon); text-decoration: none;
  background: linear-gradient(135deg, #34d399, #38bdf8 60%, #4f7cff);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.3);
  transition: filter var(--t-fast), transform var(--t-fast);
}
.ln-btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.ln-btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 11px 22px; border-radius: var(--r-full); cursor: pointer;
  border: 1px solid var(--line-2); background: transparent; color: var(--tx-1);
  font-weight: 600; font-size: var(--fs-md); text-decoration: none;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.ln-btn-ghost:hover { border-color: var(--line-glow); background: var(--bg-3); }

/* ---------------- 弹窗 / Toast ---------------- */
.ln-modal-mask {
  position: fixed; inset: 0; z-index: var(--z-modal);
  display: grid; place-items: center;
  background: rgba(3, 5, 15, 0.72); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.ln-modal-mask[hidden] { display: none; }
.ln-modal {
  width: min(420px, calc(100vw - 40px));
  padding: 34px 30px 28px; text-align: center;
  border: 1px solid var(--line-2); border-radius: 24px;
  background: var(--bg-1); box-shadow: var(--shadow-2);
  animation: lnPop 0.3s var(--ease);
}
@keyframes lnPop { from { opacity: 0; transform: translateY(14px) scale(0.97); } }
.ln-lock-orb {
  width: 64px; height: 64px; margin: 0 auto 18px;
  display: grid; place-items: center; border-radius: 20px;
  background: var(--grad-gold); color: #3a2703;
  box-shadow: 0 10px 30px rgba(255, 200, 87, 0.4);
}
.ln-lock-orb .i { width: 30px; height: 30px; }
.ln-modal h3 { margin: 0 0 10px; font-size: 22px; }
.ln-modal p { margin: 0 0 22px; color: var(--tx-2); font-size: var(--fs-sm); line-height: 1.8; }
.ln-modal-actions { display: flex; gap: 10px; justify-content: center; }

.ln-toast {
  position: fixed; left: 50%; bottom: 32px; z-index: var(--z-toast);
  max-width: calc(100% - 32px);
  padding: 12px 20px; border-radius: 12px;
  background: #eef2ff; color: #131a30; font-size: var(--fs-sm); font-weight: 600;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  transform: translate(-50%, 16px); opacity: 0;
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease);
  pointer-events: none;
}
.ln-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 加载骨架 ---------------- */
.ln-skeleton { border-radius: 22px; background: linear-gradient(100deg, var(--bg-2) 20%, var(--bg-3) 50%, var(--bg-2) 80%); background-size: 200% 100%; animation: lnLoad 1.3s infinite; }
@keyframes lnLoad { to { background-position: -200% 0; } }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .ln-catgrid, .ln-subgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ln-reader-wrap { grid-template-columns: 1fr; }
  .ln-reader-side { position: static; }
  .ln-my-hero { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .ln-topbar { flex-wrap: wrap; height: auto; padding: 9px 14px; gap: 8px; }
  .ln-brand { flex: 1; }
  .ln-brand-sub { display: none; }
  .ln-tabs { order: 3; width: 100%; overflow-x: auto; justify-content: flex-start; scrollbar-width: none; }
  .ln-tabs::-webkit-scrollbar { display: none; }
  .ln-tabs button { white-space: nowrap; padding: 7px 14px; }
  .ln-tab-home { display: none; }
  .ln-vip { font-size: 0; padding: 7px 9px; }
  .ln-vip .i { width: 14px; height: 14px; }
  .ln-view { padding: 18px 14px 70px; }
  .ln-hero { min-height: 0; padding: 34px 24px; border-radius: 24px; }
  .ln-hero h1 { font-size: 33px; }
  .ln-hero p { font-size: 14px; }
  .ln-hero-art { display: none; }
  .ln-search { padding: 5px 5px 5px 13px; }
  .ln-search button { padding: 9px 16px; }
  .ln-section { margin-top: 42px; }
  .ln-section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .ln-section-head p { text-align: left; }
  .ln-section-head h2 { font-size: 24px; }
  .ln-catgrid, .ln-catgrid.cols-2, .ln-subgrid, .ln-itemlist, .ln-vocab-grid { grid-template-columns: 1fr; }
  .ln-cat-hero { padding: 26px 22px; }
  .ln-cat-hero-inner { flex-direction: column; align-items: flex-start; gap: 14px; }
  .ln-cat-hero h2 { font-size: 25px; }
  .ln-sub-head { flex-wrap: wrap; padding: 20px; }
  .ln-sub-head .head-side { margin-left: 0; text-align: left; width: 100%; display: flex; gap: 16px; }
  .ln-reader-hero { padding: 28px 22px 24px; }
  .ln-reader-body { padding: 26px 20px 34px; }
  .ln-my-hero { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .ln-my-stat { padding: 16px; }
  .ln-my-stat b { font-size: 24px; }
  .ln-guest-cta { flex-direction: column; align-items: flex-start; }
  .ln-hist-item .h-title { white-space: normal; }
}