/* 小说站 · 独立视觉系统（书库 / 作品介绍） */

*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg: #08090c;
  --bg-2: #0d0f13;
  --surface: #111318;
  --surface-2: #171a21;
  --text: #efeee9;
  --muted: #94969e;
  --dim: #62656d;
  --line: rgba(239, 238, 233, 0.11);
  --line-strong: rgba(239, 238, 233, 0.28);
  --accent: #efeee9;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: Consolas, "Courier New", monospace;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nv-lib-body {
  background:
    radial-gradient(1100px 600px at 80% -10%, rgba(120, 150, 190, 0.12), transparent 62%),
    radial-gradient(900px 620px at 0% 30%, rgba(200, 140, 120, 0.07), transparent 60%),
    var(--bg);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; }

::selection { background: rgba(239, 238, 233, 0.22); }

.wrap { width: min(1220px, calc(100% - 44px)); margin-inline: auto; }

/* ---------------- 顶栏 ---------------- */

.nv-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  background: rgba(8, 9, 12, 0.76);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.nv-header-inner {
  width: min(1320px, calc(100% - 40px));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 62px;
}

.nv-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 0.96rem;
  letter-spacing: 0.16em;
}

.nv-logo i {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-strong);
  font-style: normal;
  font-size: 0.78rem;
  color: var(--muted);
}

.nv-nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.nv-nav a { padding-block: 4px; border-bottom: 1px solid transparent; }
.nv-nav a:hover { color: var(--text); border-color: var(--line-strong); }
.nv-nav a[aria-current="page"] { color: var(--text); border-color: var(--accent); }

/* ---------------- 书库页 ---------------- */

.nv-hero { padding: 152px 0 66px; }

.nv-hero h1 {
  margin: 18px 0 0;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: 0.02em;
}

.nv-hero .sub {
  margin-top: 18px;
  max-width: 40em;
  color: var(--muted);
  font-size: 0.95rem;
}

.nv-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
}

.nv-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--line-strong);
}

.nv-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 34px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.nv-stats b {
  display: block;
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.2;
}

.nv-stats span { font-size: 0.74rem; letter-spacing: 0.1em; color: var(--muted); }

/* 书卡 */

.nv-books {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px 22px;
  padding-bottom: 96px;
}

.book-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px 16px 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.4s, background 0.4s;
}

.book-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 5px;
  background: var(--tint);
  z-index: 2;
}

.book-card:hover {
  transform: translateY(-8px);
  border-color: var(--tint);
  background: var(--surface-2);
}

.bc-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--surface-2);
}

.bc-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-card:hover .bc-cover img { transform: scale(1.05); }

.bc-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, 0.55));
  pointer-events: none;
}

.bc-status {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  padding: 0.22em 0.6em;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  background: rgba(8, 9, 12, 0.72);
  border: 1px solid var(--line-strong);
  color: var(--text);
}

.bc-body { display: flex; flex-direction: column; gap: 6px; }

.bc-title {
  font-family: var(--serif);
  font-size: 1.24rem;
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.bc-sub { font-size: 0.78rem; color: var(--muted); letter-spacing: 0.06em; }

.bc-meta {
  margin-top: 6px;
  display: flex;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--dim);
}

/* ---------------- 目录页 ---------------- */

.nv-book-hero {
  padding: 132px 0 48px;
  border-bottom: 1px solid var(--line);
}

.nv-book-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 44px;
  align-items: start;
}

.nv-book-cover {
  position: relative;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 12px;
}

.nv-book-cover img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.nv-book-cover::before {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 5px;
  background: var(--tint);
  z-index: 2;
}

.nv-book-info h1 {
  margin: 10px 0 6px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.nv-book-info .kicker { font-size: 0.8rem; letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; }
.nv-book-info .desc { margin: 14px 0 0; color: var(--muted); max-width: 44em; font-size: 0.92rem; }

.nv-book-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

.nv-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.66em 1.15em;
  border: 1px solid var(--line-strong);
  background: transparent;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s, background 0.3s, transform 0.3s;
}

.nv-btn:hover { border-color: var(--accent); transform: translateY(-2px); }

.nv-btn[hidden] { display: none; }

.nv-btn.primary {
  background: var(--tint, var(--accent));
  border-color: var(--tint, var(--accent));
  color: #08090c;
  font-weight: 600;
}

.nv-btn.primary:hover { filter: brightness(1.1); color: #08090c; }

/* 目录 */

.nv-toc-wrap { padding: 46px 0 100px; }

.toc-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.toc-toolbar h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.toc-toolbar .count { font-family: var(--mono); font-size: 0.7rem; color: var(--dim); letter-spacing: 0.12em; }

.toc-volume { margin-bottom: 30px; }

.toc-volume h3 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.toc-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.toc-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 14px;
  background: var(--bg);
  font-size: 0.86rem;
  transition: background 0.25s, color 0.25s;
}

.toc-item .n {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--dim);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.toc-item .t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 番茄说明 */

.nv-book-note {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 响应式 */

@media (max-width: 1000px) {
  .nv-books { grid-template-columns: 1fr 1fr; }
  .toc-list { grid-template-columns: 1fr 1fr; }
  .nv-book-grid { grid-template-columns: 200px 1fr; gap: 28px; }
}

@media (max-width: 760px) {
  .wrap { width: calc(100% - 32px); }
  .nv-hero { padding-top: 118px; }
  .nv-books { grid-template-columns: 1fr 1fr; gap: 16px; }
  .nv-book-grid { grid-template-columns: 1fr; }
  .nv-book-cover, .nv-book-cover img { max-width: 280px; }
  .toc-list { grid-template-columns: 1fr; }
  .nv-nav { display: none; }
}

@media (max-width: 520px) {
  .nv-books { grid-template-columns: 1fr; }
  .nv-stats { gap: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}