/* ============================================================
 * 《循光入典》样式表
 * 配色：夜空深蓝 + 星金 + 墨青，楷体为主
 * ============================================================ */

:root {
  --bg-0: #05081a;
  --bg-1: #0a1029;
  --bg-2: #101838;
  --ink: #e8e6f0;
  --muted: #9aa0c3;
  --gold: #e6c47c;
  --gold-soft: rgba(230, 196, 124, 0.35);
  --line: rgba(230, 196, 124, 0.28);

  --c-j1: #ecd9a0;   /* 卷一 · 金 */
  --c-j2: #9fd8e8;   /* 卷二 · 冰蓝 */
  --c-j3: #c9b3f0;   /* 卷三 · 淡紫 */
  --c-j4: #a8e6c8;   /* 卷四 · 青玉 */

  /* 星云底色（随分卷筛选整体换色调，见 body[data-theme]） */
  --neb-a: rgba(38, 50, 105, 0.55);
  --neb-b: rgba(64, 38, 105, 0.45);
  --neb-c: rgba(20, 45, 90, 0.5);

  --font-title: "KaiTi", "STKaiti", "Kaiti SC", "FangSong", "STFangsong", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-0);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.8;
}

/* ---------- 星空背景 ---------- */
#stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* 星云底色（CSS 渐变，比 canvas 更柔和） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 700px at 15% 10%, var(--neb-a), transparent 60%),
    radial-gradient(1000px 650px at 85% 85%, var(--neb-b), transparent 60%),
    radial-gradient(900px 600px at 70% 20%, var(--neb-c), transparent 65%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0));
  transition: background 1.2s ease;
}

/* 分卷筛选时，星空整体换色调（视觉仪式包） */
body[data-theme="j1"] { --neb-a: rgba(96, 76, 30, 0.5);  --neb-b: rgba(70, 50, 22, 0.42); --neb-c: rgba(110, 88, 34, 0.45); }
body[data-theme="j2"] { --neb-a: rgba(26, 66, 92, 0.5);   --neb-b: rgba(22, 46, 72, 0.42);  --neb-c: rgba(28, 62, 96, 0.45); }
body[data-theme="j3"] { --neb-a: rgba(62, 44, 96, 0.5);   --neb-b: rgba(48, 32, 84, 0.42);  --neb-c: rgba(56, 40, 104, 0.45); }
body[data-theme="j4"] { --neb-a: rgba(24, 76, 62, 0.5);   --neb-b: rgba(18, 56, 54, 0.42);  --neb-c: rgba(22, 68, 70, 0.45); }

/* ---------- 顶部导航 ---------- */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 2rem;
  background: linear-gradient(180deg, rgba(5, 8, 26, 0.85), rgba(5, 8, 26, 0));
  pointer-events: none;
}
#nav .brand {
  font-family: var(--font-title);
  font-size: 1.4rem;
  letter-spacing: 0.35em;
  color: var(--gold);
  pointer-events: auto;
}
#nav .nav-links { display: flex; gap: 1.6rem; pointer-events: auto; }
#nav .nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  padding: 0.3rem 0.1rem;
  border-bottom: 1px solid transparent;
  transition: color 0.3s, border-color 0.3s;
}
#nav .nav-links a:hover,
#nav .nav-links a.active { color: var(--gold); border-bottom-color: var(--gold); }

/* ---------- 场景通用 ---------- */
.scene {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 4rem;
}
.scene-header { text-align: center; margin-bottom: 2.5rem; }
.scene-header h2 {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: 0.3em;
  color: var(--gold);
  font-weight: normal;
}
.scene-header p {
  margin-top: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.15em;
  font-size: 0.95rem;
}

/* ---------- 场景一：序章 ---------- */
#scene-intro { text-align: center; }

/* 序章漂浮的墨字 */
#ink-chars {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
#ink-chars span {
  position: absolute;
  bottom: -4rem;
  font-family: var(--font-title);
  color: rgba(200, 212, 255, 0.14);
  white-space: nowrap;
  animation: floatUp linear forwards;
}
@keyframes floatUp {
  from { transform: translateY(0) rotate(var(--r, 0deg)); opacity: 0; }
  12%  { opacity: 1; }
  to   { transform: translateY(-118vh) rotate(var(--r, 0deg)); opacity: 0; }
}

.intro-inner { position: relative; z-index: 1; max-width: 46rem; }

.intro-inner .title {
  font-family: var(--font-title);
  font-size: clamp(3.2rem, 9vw, 6rem);
  letter-spacing: 0.25em;
  color: var(--gold);
  font-weight: normal;
  text-shadow: 0 0 30px rgba(230, 196, 124, 0.45);
  animation: titleIn 1.6s ease both;
}
@keyframes titleIn {
  from { opacity: 0; transform: translateY(24px); letter-spacing: 0.6em; }
  to   { opacity: 1; transform: translateY(0);   letter-spacing: 0.25em; }
}

.intro-inner .subtitle {
  margin-top: 1.2rem;
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  letter-spacing: 0.3em;
  color: var(--muted);
  animation: fadeIn 1.6s 0.5s ease both;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.intro-text {
  margin: 2.6rem auto 0;
  text-align: justify;
  color: #c9cde8;
  font-size: 1rem;
  animation: fadeIn 1.6s 0.9s ease both;
}
.intro-text p { margin-bottom: 1rem; text-indent: 2em; }
.intro-text .highlight { color: var(--gold); }

.btn-primary {
  margin-top: 2.8rem;
  padding: 0.85rem 3.2rem;
  font-family: var(--font-title);
  font-size: 1.25rem;
  letter-spacing: 0.35em;
  color: var(--bg-0);
  background: linear-gradient(135deg, #f0d79a, var(--gold) 55%, #c9a35e);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 0 24px rgba(230, 196, 124, 0.4);
  transition: transform 0.3s, box-shadow 0.3s;
  animation: fadeIn 1.6s 1.3s ease both;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 36px rgba(230, 196, 124, 0.6); }

.hint {
  margin-top: 1.4rem;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  animation: fadeIn 1.6s 1.6s ease both;
}

/* ---------- 场景二：星河弹幕墙 ---------- */
#scene-danmaku { justify-content: flex-start; padding-top: 7rem; }

/* ---------- 今夜入典：弹幕星河之上的精选层 ---------- */
#featured-stories {
  width: 100%;
  max-width: 1500px;
  margin: 1.5rem auto 1.4rem;
}
.featured-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin-bottom: 0.85rem;
  text-align: left;
}
.featured-head h3 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.24em;
  color: var(--gold);
}
.featured-head p {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}
.featured-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
  min-height: 8.6rem;
  padding: 1rem 1.05rem 1.05rem;
  text-align: left;
  color: var(--ink);
  background: linear-gradient(160deg, rgba(22, 32, 70, 0.94), rgba(8, 12, 32, 0.9));
  border: 1px solid rgba(230, 196, 124, 0.26);
  border-radius: 14px;
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.3), inset 0 1px rgba(255, 255, 255, 0.04);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.featured-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 85% at 82% 0%, rgba(230, 196, 124, 0.16), transparent 62%);
  pointer-events: none;
}
.featured-card:hover,
.featured-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(230, 196, 124, 0.62);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.38), 0 0 24px rgba(230, 196, 124, 0.1);
}
.featured-card:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.featured-card .f-tag {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.featured-card strong {
  font-family: var(--font-title);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.1em;
}
.featured-card .f-note {
  font-size: 0.8rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.featured-card .f-enter {
  margin-top: auto;
  padding-top: 0.55rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

@media (max-width: 900px) {
  .featured-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  #featured-stories { margin: 1rem auto 1.1rem; }
  .featured-head h3 { font-size: 1.2rem; }
  .featured-grid { grid-template-columns: 1fr; gap: 0.7rem; }
  .featured-card { min-height: 0; padding: 0.9rem 1rem; }
}

#danmaku-wall {
  position: relative;
  width: 100%;
  max-width: 1500px;
  height: 62vh;
  overflow: hidden;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(10, 16, 41, 0.35), rgba(5, 8, 26, 0.6));
  border: 1px solid var(--line);
  box-shadow: 0 0 60px rgba(20, 30, 80, 0.5) inset;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 8%, #000 92%, transparent 100%);
          mask-image: linear-gradient(180deg, transparent 0, #000 8%, #000 92%, transparent 100%);
}

.danmaku {
  position: absolute;
  left: 0;
  font-family: var(--font-title);
  font-size: clamp(1.05rem, 2.1vw, 1.45rem);
  letter-spacing: 0.15em;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  will-change: transform;
  animation: dmMove linear infinite;
  text-shadow: 0 0 12px currentColor;
}
.danmaku:hover { filter: brightness(1.5); }
@keyframes dmMove {
  from { transform: translateX(100vw); }
  to   { transform: translateX(calc(-100% - 100vw)); }
}
.danmaku.j1 { color: var(--c-j1); }
.danmaku.j2 { color: var(--c-j2); }
.danmaku.j3 { color: var(--c-j3); }
.danmaku.j4 { color: var(--c-j4); }

/* 暂停时所有弹幕定格 */
#danmaku-wall.paused .danmaku { animation-play-state: paused; }

/* 被点中的弹幕放大高亮 */
.danmaku.focus {
  filter: brightness(1.8) drop-shadow(0 0 14px currentColor);
  z-index: 10;
}

/* 控制栏 */
#controls {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
}
#controls button {
  padding: 0.45rem 1.1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: rgba(16, 24, 56, 0.75);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s;
}
#controls button:hover { border-color: var(--gold); color: var(--gold); }
#controls button.on {
  background: var(--gold-soft);
  color: var(--gold);
  border-color: var(--gold);
}
#controls .sep { width: 1px; height: 1.4rem; background: var(--line); margin: 0 0.3rem; }

.legend {
  margin-top: 1.2rem;
  display: flex;
  gap: 1.4rem;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.15em;
}
.legend i {
  display: inline-block;
  width: 0.7rem; height: 0.7rem;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: middle;
}

/* ---------- 典故卡片（弹幕点击后弹出） ---------- */
#card-overlay {
  position: fixed;
  inset: 0;
  z-index: 220;   /* 高于图鉴层(210)，从图鉴点开典故时卡片浮在图鉴之上 */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(3, 5, 16, 0.72);
  backdrop-filter: blur(6px);
  opacity: 0;
  /* 关键：未弹出时不能挡住页面上任何点击 */
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.35s, visibility 0s 0.35s;
}
#card-overlay.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.35s;
}

#card-overlay .card {
  position: relative;
  width: min(660px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  padding: 2.4rem 2.6rem 2rem;
  background: linear-gradient(160deg, rgba(20, 28, 66, 0.97), rgba(8, 12, 32, 0.97));
  border: 1px solid var(--gold);
  border-radius: 16px;
  box-shadow: 0 0 60px rgba(230, 196, 124, 0.25);
  transform: scale(0.92);
  transition: transform 0.35s;
}
#card-overlay.show .card { transform: scale(1); }

.card .card-tag {
  display: inline-block;
  padding: 0.15rem 0.9rem;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  border: 1px solid var(--gold-soft);
  border-radius: 999px;
  margin-bottom: 1.2rem;
}
.card .card-text {
  font-family: var(--font-title);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  letter-spacing: 0.2em;
  color: #fff;
  text-shadow: 0 0 22px rgba(230, 196, 124, 0.55);
  margin-bottom: 1.4rem;
}
.card .card-shiyi {
  color: #d6daf0;
  font-size: 1.02rem;
  text-align: justify;
  margin-bottom: 1rem;
}
.card .card-meta {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
}
.card .card-deyu {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.3rem 1rem;
  color: #a8e6c8;
  border: 1px solid rgba(168, 230, 200, 0.35);
  border-radius: 999px;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
}
.card .card-actions { margin-top: 1.8rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }
.card .card-actions button {
  padding: 0.55rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  letter-spacing: 0.15em;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s;
}
#btn-replay { color: var(--bg-0); background: var(--gold); border: none; }
#btn-replay:hover { box-shadow: 0 0 18px rgba(230, 196, 124, 0.5); }
#btn-close { color: var(--ink); background: transparent; border: 1px solid var(--line); }
#btn-close:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- 场景三：经典故事 AI 影像 ---------- */
#scene-video { padding-top: 7rem; }

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  width: 100%;
  max-width: 1100px;
}
.video-card {
  background: linear-gradient(170deg, rgba(18, 26, 60, 0.85), rgba(8, 12, 32, 0.9));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem;
  transition: transform 0.35s, box-shadow 0.35s;
}
.video-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(20, 30, 80, 0.55); }

.video-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  background: #060a1e;
}
.video-box video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
}
.video-placeholder {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--gold);
}
.video-placeholder .big-char {
  font-family: var(--font-title);
  font-size: 4.6rem;
  text-shadow: 0 0 26px rgba(230, 196, 124, 0.5);
}
.video-placeholder .ph-note { color: var(--muted); font-size: 0.8rem; letter-spacing: 0.2em; }
.video-placeholder.hide { display: none; }
.video-box.v1 .video-placeholder { background: radial-gradient(320px 200px at 30% 30%, rgba(60, 50, 20, 0.9), #080c22 75%); }
.video-box.v2 .video-placeholder { background: radial-gradient(320px 200px at 70% 30%, rgba(25, 55, 55, 0.9), #080c22 75%); }
.video-box.v3 .video-placeholder { background: radial-gradient(320px 200px at 30% 70%, rgba(55, 30, 60, 0.9), #080c22 75%); }
.video-box.v4 .video-placeholder { background: radial-gradient(320px 200px at 70% 70%, rgba(20, 45, 70, 0.9), #080c22 75%); }
.video-box.v5 .video-placeholder { background: radial-gradient(320px 200px at 50% 32%, rgba(28, 50, 74, 0.92), #080c22 75%); }
.video-box.v6 .video-placeholder { background: radial-gradient(320px 200px at 50% 42%, rgba(62, 52, 38, 0.94), #080c22 75%); }
.video-box.v7 .video-placeholder { background: radial-gradient(320px 200px at 38% 38%, rgba(30, 58, 48, 0.94), #080c22 75%); }

.video-card h3 {
  margin-top: 1rem;
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: normal;
  letter-spacing: 0.25em;
  color: var(--gold);
}
.video-card .orig {
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
}
.video-card .story {
  margin-top: 0.8rem;
  color: #c9cde8;
  font-size: 0.95rem;
  text-align: justify;
}
.video-card .clip-note {
  margin-top: 0.55rem;
  color: #8794b8;
  font-size: 0.78rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
}
.video-card .lesson {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.2rem 0.9rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: #a8e6c8;
  border: 1px solid rgba(168, 230, 200, 0.35);
  border-radius: 999px;
}
@media (min-width: 861px) {
  .video-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    width: calc(50% - 1rem);
    justify-self: center;
  }
}

.ai-note {
  margin-top: 2.6rem;
  max-width: 720px;
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  line-height: 1.9;
}

/* ---------- 页脚 ---------- */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2.4rem 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  border-top: 1px solid rgba(230, 196, 124, 0.12);
}
footer .team { color: var(--gold); }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .video-grid { grid-template-columns: 1fr; }
  #danmaku-wall { height: 58vh; }
  #nav { padding: 0.8rem 1.2rem; }
  #nav .nav-links { gap: 1rem; }
  #nav .nav-links a { font-size: 0.85rem; letter-spacing: 0.1em; }
}

/* ============================================================
 * 增强包 ② 视觉仪式包：开屏动画
 * ============================================================ */
#splash {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(900px 600px at 50% 35%, rgba(26, 34, 72, 0.85), transparent 70%),
    #04061a;
  cursor: pointer;
  transition: opacity 0.8s ease, visibility 0s 0.8s;
}
#splash.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
#splash .s-title {
  font-family: var(--font-title);
  font-size: clamp(3rem, 11vw, 6.8rem);
  letter-spacing: 0.3em;
  color: var(--gold);
  text-shadow: 0 0 40px rgba(230, 196, 124, 0.5);
}
#splash .s-title span {
  display: inline-block;
  opacity: 0;
  filter: blur(14px);
  animation: inkIn 0.9s ease forwards;
}
#splash .s-title span:nth-child(1) { animation-delay: 0.15s; }
#splash .s-title span:nth-child(2) { animation-delay: 0.38s; }
#splash .s-title span:nth-child(3) { animation-delay: 0.61s; }
#splash .s-title span:nth-child(4) { animation-delay: 0.84s; }
@keyframes inkIn {
  from { opacity: 0; filter: blur(14px); transform: translateY(16px) scale(1.1); }
  to   { opacity: 1; filter: blur(0); transform: none; }
}
#splash .s-sub {
  margin-top: 1.4rem;
  font-size: 0.95rem;
  letter-spacing: 0.4em;
  color: var(--muted);
  opacity: 0;
  animation: fadeIn 1.2s 1.1s ease forwards;
}
#splash .s-hint {
  position: absolute;
  bottom: 3.2rem;
  font-size: 0.85rem;
  letter-spacing: 0.5em;
  color: var(--muted);
  opacity: 0;
  animation: fadeIn 1.2s 1.6s ease forwards, hintPulse 2.4s 2s ease-in-out infinite;
}
@keyframes hintPulse {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 1; }
}

/* ============================================================
 * 增强包 ④ 背景音乐：导航栏音乐按钮
 * ============================================================ */
#nav .nav-links button {
  background: none;
  border: none;
  padding: 0.3rem 0.1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: color 0.3s, border-color 0.3s;
}
#nav .nav-links button:hover,
#nav .nav-links button.on { color: var(--gold); border-bottom-color: var(--gold); }

/* ============================================================
 * 增强包 ① 内容深度包：数据统计 + 德育点标签云
 * ============================================================ */
.stats {
  margin-top: 1.6rem;
  display: flex;
  justify-content: center;
  gap: 2.6rem;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-title);
  font-size: 1.9rem;
  color: var(--gold);
  line-height: 1.2;
  text-shadow: 0 0 16px rgba(230, 196, 124, 0.45);
}
.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.3em;
}

#tag-cloud,
#rhyme-cloud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  max-width: 860px;
  margin: 0.4rem auto 0.8rem;
  padding: 0 1rem;
}
#rhyme-cloud {
  margin-top: 0;
  margin-bottom: 1.1rem;
  padding-top: 0.7rem;
  border-top: 1px solid rgba(154, 160, 195, 0.12);
}
.filter-label {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-right: 0.2rem;
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
}
.filter-hint {
  color: var(--muted);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  opacity: 0.8;
}
#tag-cloud button,
#rhyme-cloud button {
  padding: 0.32rem 1rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: rgba(16, 24, 56, 0.55);
  border: 1px solid rgba(154, 160, 195, 0.25);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s;
}
#tag-cloud button:hover,
#rhyme-cloud button:hover { border-color: var(--gold); color: var(--gold); }
#tag-cloud button.on,
#rhyme-cloud button.on {
  background: var(--gold-soft);
  color: var(--gold);
  border-color: var(--gold);
}
#tag-cloud button.tag-chip .tag-count,
#rhyme-cloud button.tag-chip .tag-count {
  font-size: 0.7rem;
  opacity: 0.75;
  margin-left: 0.3rem;
}
#tag-cloud #btn-glossary {
  color: var(--gold);
  border-color: var(--gold-soft);
  background: rgba(230, 196, 124, 0.08);
}

/* 标签选中时：匹配的弹幕发光，其余暗淡 */
#danmaku-wall.filtering .danmaku:not(.glow) { opacity: 0.13; }
.danmaku.glow { text-shadow: 0 0 14px currentColor, 0 0 32px currentColor; }

/* 四个影像故事的典故：金色描边（视觉仪式包） */
.danmaku.hot {
  color: var(--gold);
  text-shadow: 0 0 14px var(--gold), 0 0 30px rgba(230, 196, 124, 0.5);
}
.danmaku.hot::before { content: "★ "; font-size: 0.75em; vertical-align: 3px; }

/* 已收藏的典故：句尾缀星 */
.danmaku.fav::after { content: " ☆"; font-size: 0.7em; color: var(--gold); vertical-align: 2px; }

/* ============================================================
 * 增强包 ① 典故图鉴（可搜索的完整典故库）
 * ============================================================ */
#glossary-overlay {
  position: fixed;
  inset: 0;
  z-index: 210;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(3, 5, 16, 0.72);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.35s, visibility 0s 0.35s;
}
#glossary-overlay.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.35s;
}

#glossary-overlay .glossary {
  display: flex;
  flex-direction: column;
  width: min(900px, 100%);
  height: min(80vh, 720px);
  background: linear-gradient(160deg, rgba(20, 28, 66, 0.98), rgba(8, 12, 32, 0.98));
  border: 1px solid var(--gold);
  border-radius: 16px;
  box-shadow: 0 0 60px rgba(230, 196, 124, 0.25);
  overflow: hidden;
  transform: scale(0.94);
  transition: transform 0.35s;
}
#glossary-overlay.show .glossary { transform: scale(1); }

.glossary-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  padding: 1rem 1.3rem;
  border-bottom: 1px solid var(--line);
}
.glossary-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  white-space: nowrap;
}
#glossary-search {
  flex: 1;
  min-width: 170px;
  padding: 0.5rem 1.1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--ink);
  background: rgba(8, 12, 32, 0.8);
  border: 1px solid var(--line);
  border-radius: 999px;
  outline: none;
  transition: border-color 0.25s;
}
#glossary-search:focus { border-color: var(--gold); }
#glossary-search::placeholder { color: var(--muted); }

.g-tabs { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.g-tab {
  padding: 0.28rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: rgba(16, 24, 56, 0.55);
  border: 1px solid rgba(154, 160, 195, 0.25);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s;
}
.g-tab:hover { border-color: var(--gold); color: var(--gold); }
.g-tab.on { background: var(--gold-soft); color: var(--gold); border-color: var(--gold); }
.g-tab-fav { color: var(--gold); }

#glossary-close {
  padding: 0.25rem 0.7rem;
  font-size: 1rem;
  color: var(--muted);
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s;
}
#glossary-close:hover { color: var(--gold); border-color: var(--gold); }

.glossary-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.8rem 1.4rem 1.4rem;
}
.glossary-list::-webkit-scrollbar { width: 8px; }
.glossary-list::-webkit-scrollbar-thumb { background: rgba(230, 196, 124, 0.25); border-radius: 4px; }

.g-item {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}
.g-item:hover { background: rgba(230, 196, 124, 0.08); }
.g-item .g-text {
  font-family: var(--font-title);
  font-size: 1.1rem;
  letter-spacing: 0.12em;
  white-space: nowrap;
}
.g-item .g-text.g-j1 { color: var(--c-j1); }
.g-item .g-text.g-j2 { color: var(--c-j2); }
.g-item .g-text.g-j3 { color: var(--c-j3); }
.g-item .g-text.g-j4 { color: var(--c-j4); }
.g-item .g-yun {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.g-item .g-cat {
  margin-left: auto;
  padding: 0.05rem 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--gold);
  border: 1px solid var(--gold-soft);
  border-radius: 999px;
  white-space: nowrap;
}
.g-empty {
  text-align: center;
  color: var(--muted);
  letter-spacing: 0.2em;
  padding: 3rem 0;
}

/* ============================================================
 * 增强包 ③ 收藏功能：卡片上的收藏按钮
 * ============================================================ */
#btn-fav {
  color: var(--gold);
  background: transparent;
  border: 1px solid var(--gold-soft);
}
#btn-fav:hover { box-shadow: 0 0 16px rgba(230, 196, 124, 0.4); }
#btn-fav.faved { background: var(--gold-soft); }

/* ---------- 响应式（增强包） ---------- */
@media (max-width: 860px) {
  .stats { gap: 1.6rem; }
  .stat-num { font-size: 1.5rem; }
  .glossary-head { padding: 0.9rem 1rem; }
  .g-item { flex-wrap: wrap; gap: 0.4rem 0.8rem; }
  #splash .s-hint { bottom: 2.2rem; }
}

/* ---------- 两套分类的窄屏布局（放在基础样式之后覆盖） ---------- */
@media (max-width: 860px) {
  #tag-cloud, #rhyme-cloud { gap: 0.4rem; }
  /* 触控目标保持 44px，字号维持原尺寸，不用字体撑高按钮。 */
  #tag-cloud button, #rhyme-cloud button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.26rem 0.7rem;
    font-size: 0.78rem;
  }
  #rhyme-cloud { padding-top: 0.6rem; }
  .filter-label { width: 100%; justify-content: center; margin: 0 0 0.1rem; }
}

/* 窄屏只让韵部横向滑动，避免 30 个韵部把弹幕墙推得太远 */
@media (max-width: 600px) {
  #rhyme-cloud {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 0.6rem 0.9rem 0.75rem;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  #rhyme-cloud::-webkit-scrollbar { display: none; }
  #rhyme-cloud .filter-label {
    width: auto;
    flex: 0 0 auto;
    margin: 0 0.25rem 0 0;
  }
  #rhyme-cloud .tag-chip { flex: 0 0 auto; }
}

/* 四板块主题：保留原有筛选按钮样式，板块只提供阅读层级。 */
.theme-filter-group { display: inline-flex; align-items: center; gap: .4rem; max-width: 100%; }
.theme-filter-heading { flex: 0 0 auto; padding-left: .65rem; border-left: 1px solid rgba(201,174,119,.25); color: #b6a37e; font-size: 10px; letter-spacing: .08em; white-space: nowrap; }
#tag-cloud .theme-filter-group { flex-wrap: wrap; justify-content: center; }
#sky-tag-filter .theme-filter-group { flex: 0 0 auto; max-width: none; }

.video-reading-button { min-height: 44px; margin-top: 14px; padding: 9px 16px; border: 1px solid rgba(230,196,124,.5); background: transparent; color: var(--gold); font: inherit; cursor: pointer; }
.video-reading-button:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.glossary-head { display: grid; grid-template-columns: auto minmax(170px, 1fr) 44px; gap: 10px 16px; flex-shrink: 0; }
.glossary-title { grid-column: 1; grid-row: 1; }
#glossary-search { grid-column: 2; grid-row: 1; width: 100%; min-width: 0; min-height: 44px; }
#glossary-close { grid-column: 3; grid-row: 1; min-width: 44px; min-height: 44px; padding: 0; }
#glossary-tabs { grid-column: 1 / -1; grid-row: 2; gap: 6px; }
#glossary-tabs .g-tab { min-width: 44px; min-height: 44px; padding: 8px 10px; }
.glossary-list { min-height: 0; }
.glossary-list .g-item { min-height: 44px; }
@media (max-width: 760px) {
  .glossary-head { grid-template-columns: minmax(0, 1fr) 44px; gap: 8px; padding: 12px 16px; }
  #glossary-search { grid-column: 1 / -1; grid-row: 2; font-size: 16px; padding-inline: 12px; }
  #glossary-close { grid-column: 2; grid-row: 1; }
  #glossary-tabs { grid-row: 3; }
}