:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f1f3f6;
  --text: #17181c;
  --muted: #6b7280;
  --faint: #9ca3af;
  --border: #e5e7eb;
  --primary: #4f46e5;
  --primary-soft: #eef2ff;
  --success: #0f8a5f;
  --success-soft: #e7f6ef;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --danger: #c02626;
  --danger-soft: #fdecec;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 18, 27, 0.04), 0 8px 24px rgba(16, 18, 27, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }

/* ---------------- 布局 ---------------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1120px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 16px; }
.brand-mark {
  width: 28px; height: 28px; border-radius: 8px; background: var(--primary);
  color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 600;
}
.nav { display: flex; gap: 4px; margin-left: 8px; flex-wrap: wrap; }
.nav a {
  padding: 6px 12px; border-radius: 8px; color: var(--muted); font-size: 13px;
}
.nav a:hover { background: var(--surface-2); color: var(--text); }
.nav a.active { background: var(--primary-soft); color: var(--primary); font-weight: 500; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.page { max-width: 1120px; margin: 0 auto; padding: 24px 20px 64px; }

/* ---------------- 页脚 ---------------- */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: 8px; padding: 18px 20px 24px; }
.site-footer-inner { display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: center; font-size: 12px; color: var(--muted); }
.site-footer-inner a { color: var(--muted); text-decoration: none; }
.site-footer-inner a:hover { color: var(--primary); }
.admin-foot { margin-top: 24px; padding: 14px 0 6px; border-top: 1px solid var(--border); }
.admin-foot-inner { display: flex; flex-wrap: wrap; gap: 4px 14px; justify-content: center; font-size: 12px; color: var(--faint); }
.section-title { font-size: 16px; font-weight: 600; margin: 0 0 12px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 28px 0 12px; }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.small { font-size: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.grid { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); }
.stack { display: grid; gap: 10px; }

/* ---------------- 卡片 ---------------- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.card-hover { transition: transform .12s ease, box-shadow .12s ease; }
.card-hover:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.hero {
  background: linear-gradient(180deg, #fff, #fbfbfd);
  border: 1px solid var(--border); border-radius: 16px;
  padding: 28px; margin-bottom: 8px;
}
.hero h1 { margin: 0 0 8px; font-size: 24px; }
.hero p { margin: 0; color: var(--muted); }

.cover {
  height: 118px; border-radius: 10px; margin: -4px -4px 12px;
  background: var(--primary-soft); color: var(--primary);
  display: grid; place-items: center; font-size: 13px; font-weight: 500;
  overflow: hidden;
}
.cover img { width: 100%; height: 100%; object-fit: cover; }
.cover.tone-1 { background: #eef2ff; color: #4338ca; }
.cover.tone-2 { background: #e7f6ef; color: #0f8a5f; }
.cover.tone-3 { background: #fef3c7; color: #b45309; }
.cover.tone-4 { background: #fdecec; color: #c02626; }
.cover.tone-5 { background: #e9f1fb; color: #1d4ed8; }

.title-2 { font-size: 15px; font-weight: 600; margin: 0 0 4px; }
.clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------------- 组件 ---------------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 999px; font-size: 12px; line-height: 1.6;
  background: var(--surface-2); color: var(--muted);
}
.badge-primary { background: var(--primary-soft); color: var(--primary); }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warn { background: var(--warn-soft); color: var(--warn); }
.badge-danger { background: var(--danger-soft); color: var(--danger); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 14px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--surface); cursor: pointer; font-size: 13px;
  transition: background .12s ease, border-color .12s ease, opacity .12s ease;
}
.btn:hover { background: var(--surface-2); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: #4338ca; }
.btn-ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-danger { color: var(--danger); border-color: #f3d0d0; background: var(--danger-soft); }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 8px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.field { display: grid; gap: 6px; }
.field label { font-size: 12px; color: var(--muted); }
input, select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border);
  border-radius: 9px; background: var(--surface); outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); }
textarea { min-height: 90px; resize: vertical; }
.form-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--surface); font-size: 13px; cursor: pointer; color: var(--muted);
}
.chip.active { background: var(--text); border-color: var(--text); color: #fff; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-weight: 500; color: var(--muted); background: var(--surface-2); font-size: 12px; }
tbody tr:hover { background: #fafafa; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }

.empty { padding: 40px 20px; text-align: center; color: var(--faint); }
.price { font-size: 20px; font-weight: 600; }
.price small { font-size: 12px; font-weight: 400; color: var(--muted); }

/* 章节列表 */
.chapter {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
}
.chapter + .chapter { margin-top: 8px; }
.chapter-idx { width: 22px; color: var(--faint); font-size: 12px; text-align: center; }
.chapter-main { flex: 1; min-width: 0; }
.chapter-title { font-size: 14px; }
.chapter.locked .chapter-title { color: var(--muted); }
.kind-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--primary); display: inline-block; }

/* 锁定遮罩 */
.paywall {
  border: 1px dashed #d6d3f5; background: linear-gradient(180deg, #fff, var(--primary-soft));
  border-radius: var(--radius); padding: 22px; text-align: center;
}
.paywall h3 { margin: 0 0 6px; font-size: 15px; }
.paywall p { margin: 0 0 14px; color: var(--muted); font-size: 13px; }

.reader { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.reader-body { font-size: 15px; line-height: 1.85; }
.reader-body p { margin: 0 0 14px; }
video, audio { width: 100%; border-radius: 10px; background: #000; }
audio { background: transparent; }

/* 弹层 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(17, 18, 22, .42);
  display: grid; place-items: center; padding: 20px; z-index: 60;
}
.modal {
  background: var(--surface); border-radius: 14px; width: min(560px, 100%);
  max-height: 88vh; overflow: auto; box-shadow: var(--shadow);
}
.modal-head { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-title { font-size: 15px; font-weight: 600; }
.modal-body { padding: 20px; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

.toast-wrap { position: fixed; right: 20px; bottom: 20px; display: grid; gap: 8px; z-index: 80; }
.toast {
  background: #17181c; color: #fff; padding: 10px 14px; border-radius: 10px;
  font-size: 13px; box-shadow: var(--shadow); animation: pop .18s ease;
}
.toast.ok { background: #0f8a5f; }
.toast.err { background: #c02626; }
@keyframes pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.qr { width: 200px; height: 200px; border: 1px solid var(--border); border-radius: 10px; display: block; margin: 0 auto; }

.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat-label { font-size: 12px; color: var(--muted); }
.stat-value { font-size: 22px; font-weight: 600; margin-top: 2px; }

.progress-bar { height: 6px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.progress-bar i { display: block; height: 100%; background: var(--primary); }

/* ---------------- 管理端 ---------------- */
.admin-layout { display: grid; grid-template-columns: 208px 1fr; min-height: 100vh; }
.sidebar { background: var(--surface); border-right: 1px solid var(--border); padding: 16px 12px; position: sticky; top: 0; height: 100vh; overflow: auto; }
.side-group { margin-top: 14px; }
.side-group-label { font-size: 11px; color: var(--faint); padding: 0 10px 6px; letter-spacing: .04em; }
.side-link { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; border-radius: 8px; color: var(--muted); cursor: pointer; font-size: 13px; }
.side-link:hover { background: var(--surface-2); color: var(--text); }
.side-link.active { background: var(--primary-soft); color: var(--primary); font-weight: 500; }
.admin-main { padding: 22px 26px 60px; min-width: 0; }
.admin-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.admin-head h2 { margin: 0; font-size: 18px; }

.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(400px, 100%); }

@media (max-width: 860px) {
  .admin-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; display: flex; gap: 6px; overflow-x: auto; }
  .side-group { margin: 0; display: flex; gap: 6px; }
  .side-group-label { display: none; }
  .nav { display: none; }
}

/* ---------------- 用户端移动端 ---------------- */
.hamburger {
  display: none;
  margin-left: auto;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface); cursor: pointer; font-size: 18px; line-height: 1;
}
.mobile-menu { position: fixed; inset: 0; z-index: 55; }
.mobile-menu[hidden] { display: none; }
.mm-mask { position: absolute; inset: 0; background: rgba(17, 18, 22, .42); }
.mm-panel {
  position: absolute; top: 0; right: 0; height: 100%;
  width: min(300px, 82%); background: var(--surface);
  box-shadow: var(--shadow); padding: 14px; display: flex; flex-direction: column;
  animation: slideIn .18s ease;
}
@keyframes slideIn { from { transform: translateX(20px); opacity: .6; } to { transform: none; opacity: 1; } }
.mm-head { display: flex; align-items: center; justify-content: space-between; font-weight: 600; padding: 4px 6px 12px; }
.mm-nav { display: grid; gap: 4px; }
.mm-nav a { padding: 12px 10px; border-radius: 9px; color: var(--text); font-size: 15px; }
.mm-nav a:hover, .mm-nav a.active { background: var(--primary-soft); color: var(--primary); }
.mm-sep { height: 1px; background: var(--border); margin: 12px 0; }
.mm-user { display: grid; gap: 8px; }
.mm-user .btn { width: 100%; }

@media (max-width: 760px) {
  .topbar-inner { gap: 10px; padding: 10px 14px; }
  .nav, .topbar-right { display: none; }
  .hamburger { display: inline-flex; }
  .brand span:not(.brand-mark) { font-size: 15px; }
  .page { padding: 16px 14px 56px; }
  .hero { padding: 20px 16px; border-radius: 14px; }
  .hero h1 { font-size: 20px; }
  .hero p { font-size: 13px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .cover { height: 150px; }
  .modal { width: 100%; max-height: 92vh; border-radius: 14px 14px 0 0; align-self: end; }
  .modal-mask { padding: 0; align-items: end; }
  .reader { padding: 16px; border-radius: 12px; }
  .reader-body { font-size: 15px; line-height: 1.8; }
  .admin-main { padding: 16px 14px 48px; }
  .admin-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .admin-head .btn, .admin-head button { width: 100%; }
  .login-card { width: 100%; }
  .row { gap: 8px; }
  .row .btn { flex: 1; }
  table { font-size: 12px; }
  th, td { padding: 8px 9px; }
  .stat-value { font-size: 19px; }
}