:root {
  --red: #DE2910;
  --red-deep: #A60D06;
  --red-dark: #7d0a05;
  --gold: #FFC53D;
  --ink: #222;
  --muted: #8a8a8a;
  --bg: #f6f4f0;
  --card: #ffffff;
  --line: #e7e2da;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

/* ============ 顶栏 ============ */
.topbar {
  background: var(--red-deep);
  box-shadow: 0 2px 10px rgba(0, 0, 0, .25);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
}
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-badge {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: radial-gradient(circle at 35% 30%, #ff8a4a, var(--red));
  border: 1.5px solid var(--gold);
  border-radius: 8px;
  color: #fff;
  font-size: 18px;
  transform: rotate(-6deg);
}
.logo-text {
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
}
.topnav { display: flex; gap: 6px; }
.topnav a {
  color: rgba(255, 255, 255, .92);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 15px;
  transition: background .2s;
}
.topnav a:hover { background: rgba(255, 255, 255, .14); }

/* ============ 首屏横幅 ============ */
.hero {
  position: relative;
  background: linear-gradient(135deg, #E4341A 0%, var(--red) 45%, var(--red-deep) 100%);
  color: #fff;
  overflow: hidden;
}
.hero-pattern {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, .14) 1px, transparent 1.5px);
  background-size: 22px 22px;
  opacity: .6;
}
.hero::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -2px;
  height: 46px;
  background:
    radial-gradient(26px at 50% 0, transparent 98%, #f6f4f0) 0 0 / 52px 100% repeat-x,
    linear-gradient(#f6f4f0, #f6f4f0) center/calc(100% - 52px) 100% no-repeat;
}
.hero-content {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 20px 90px;
  text-align: center;
}
.hero-content h1 {
  font-size: clamp(34px, 6vw, 56px);
  letter-spacing: 6px;
  text-shadow: 0 3px 14px rgba(0, 0, 0, .3);
  margin-bottom: 14px;
}
.hero-sub {
  font-size: clamp(14px, 2.2vw, 18px);
  color: rgba(255, 255, 255, .92);
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 30px;
}
.stat {
  min-width: 128px;
  background: rgba(0, 0, 0, .18);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 12px;
  padding: 12px 18px;
  backdrop-filter: blur(2px);
}
.stat b { display: block; font-size: 24px; color: var(--gold); }
.stat span { font-size: 13px; color: rgba(255, 255, 255, .85); }

/* ============ 主体布局 ============ */
.container { max-width: 1200px; margin: 0 auto; padding: 26px 20px 60px; }

/* 搜索与排序 */
.searchbar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.search-input {
  flex: 1 1 320px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 0 12px;
  color: var(--muted);
  transition: border-color .2s, box-shadow .2s;
}
.search-input:focus-within {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(222, 41, 16, .12);
}
.search-input input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 15px;
  padding: 11px 0;
  background: transparent;
  color: var(--ink);
}
.search-clear {
  border: none;
  background: #eee;
  width: 22px; height: 22px;
  border-radius: 50%;
  color: #666;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
.sort-select {
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--card);
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
  outline: none;
}

/* 分类标签 */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 22px; }
.chip {
  border: 1.5px solid var(--line);
  background: var(--card);
  color: #555;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  transition: all .2s;
}
.chip:hover { border-color: var(--red); color: var(--red); }
.chip.active {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  font-weight: 600;
}
.chip.static { cursor: default; border-color: #f3d3cd; background: #fdeeea; color: var(--red); margin-top: 8px; }

/* 列表标题 */
.lib-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--red-deep);
  padding-bottom: 10px;
  margin-bottom: 20px;
}
.lib-head h2 { font-size: 22px; letter-spacing: 2px; color: var(--red-deep); }
.lib-head::before {
  content: "";
  width: 6px; height: 24px;
  background: var(--gold);
  border-radius: 3px;
  align-self: center;
}
.lib-count { color: var(--muted); font-size: 14px; }

/* ============ 视频卡片 ============ */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 26px rgba(160, 20, 10, .16);
  border-color: #e8b9b0;
}
.cover {
  position: relative;
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  overflow: hidden;
  user-select: none;
}
.cover::before {
  content: "▶";
  font-size: 34px;
  color: #fff;
  opacity: 0;
  transition: opacity .2s, transform .2s;
  text-shadow: 0 2px 10px rgba(0, 0, 0, .5);
  transform: scale(.8);
  z-index: 2;
}
.card:hover .cover::before { opacity: .95; transform: scale(1); }
.cover-title {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .35);
  z-index: 1;
}
.cover-cat {
  position: absolute;
  top: 10px; left: 10px;
  background: rgba(0, 0, 0, .35);
  color: #fff;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .35);
  z-index: 2;
  backdrop-filter: blur(2px);
}
.card-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-title {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.9em;
}
.card-meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12.5px;
  margin-top: auto;
}
.card-meta .dl {
  color: var(--red);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 0;
  font-size: 16px;
  line-height: 2;
}

/* ============ 分页 ============ */
.pager {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 34px;
}
.pager button {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1.5px solid var(--line);
  background: var(--card);
  border-radius: 8px;
  cursor: pointer;
  color: var(--ink);
  font-size: 14px;
  transition: all .15s;
}
.pager button:hover:not(:disabled):not(.on) { border-color: var(--red); color: var(--red); }
.pager button.on {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  font-weight: 700;
}
.pager button:disabled { opacity: .4; cursor: not-allowed; }

/* ============ 详情弹层 ============ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 5, 3, .62);
  backdrop-filter: blur(3px);
  z-index: 90;
  animation: fadeIn .18s ease;
}
.modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: min(680px, calc(100% - 32px));
  max-height: calc(100vh - 48px);
  overflow: auto;
  background: var(--card);
  border-radius: 16px;
  z-index: 100;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .45);
  animation: popIn .22s ease;
}
@keyframes fadeIn { from { opacity: 0; } }
@keyframes popIn {
  from { opacity: 0; transform: translate(-50%, -46%) scale(.96); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
.modal-cover {
  position: relative;
  height: 150px;
  display: grid;
  place-items: center;
}
.modal-cover .logo-badge { font-size: 40px; width: auto; height: auto; background: transparent; border: none; transform: none; }
.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  width: 34px; height: 34px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, .4);
  color: #fff;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  z-index: 5;
  transition: background .2s;
}
.modal-close:hover { background: rgba(0, 0, 0, .65); }
.modal-body { padding: 22px 26px 26px; }
.modal-body h3 { font-size: 21px; color: var(--red-deep); line-height: 1.5; }
.meta { margin: 14px 0 0; border-collapse: collapse; width: 100%; font-size: 14px; }
.meta th {
  text-align: left;
  width: 96px;
  color: var(--muted);
  font-weight: 400;
  padding: 6px 0;
  vertical-align: top;
}
.meta td { padding: 6px 0; word-break: break-all; }
.desc {
  margin-top: 10px;
  padding: 12px 14px;
  background: #faf6f1;
  border-left: 3px solid var(--gold);
  border-radius: 0 8px 8px 0;
  font-size: 14px;
  color: #4a4a4a;
  white-space: pre-line;
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all .18s;
}
.btn-primary {
  background: linear-gradient(180deg, #F0391F, var(--red) 60%, #C91B08);
  color: #fff;
  box-shadow: 0 4px 12px rgba(222, 41, 16, .35);
}
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-ghost {
  background: var(--card);
  border: 1.5px solid var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--red); color: var(--red); }
.hint { margin-top: 12px; font-size: 12.5px; color: var(--muted); }

/* ============ 使用指引 / 页脚 ============ */
.usage {
  margin-top: 56px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 28px;
}
.usage h2 { font-size: 19px; color: var(--red-deep); margin-bottom: 12px; }
.usage ol { padding-left: 22px; color: #4a4a4a; font-size: 14.5px; }
.usage li { margin: 8px 0; }
.usage b { color: var(--red); }

.footer {
  background: #2b0603;
  color: rgba(255, 255, 255, .8);
  text-align: center;
  padding: 30px 20px;
  font-size: 14px;
}
.footer .foot-note {
  margin-top: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, .45);
}

/* 提示气泡 */
.toast {
  position: fixed;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  background: #2b0603;
  color: #fff;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .3);
  z-index: 200;
  animation: rise .25s ease;
}
@keyframes rise { from { opacity: 0; transform: translate(-50%, 12px); } }

/* ============ 响应式 ============ */
@media (max-width: 720px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .topnav { display: none; }
  .hero-content { padding: 44px 16px 76px; }
  .modal-body { padding: 18px; }
  .usage { padding: 18px; }
}
@media (max-width: 460px) {
  .grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .cover-title { font-size: 13px; padding: 10px; }
  .card-body { padding: 8px 10px; }
  .card-title { font-size: 13.5px; }
  .stat { min-width: calc(50% - 10px); }
  .hero-stats { gap: 10px; }
}