/* ============================================================
   AI 名词宇宙 · 科技感 HUD 样式
   深紫黑底 + 霓虹紫/青 发光
   ============================================================ */

:root {
  --bg: #05010d;
  --purple: #a855f7;
  --purple-dim: rgba(168, 85, 247, 0.35);
  --cyan: #22d3ee;
  --pink: #ff4fd8;
  --text: #e9e4ff;
  --text-dim: #9b8fc7;
  --panel: rgba(16, 8, 34, 0.72);
  --panel-border: rgba(168, 85, 247, 0.35);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, monospace;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

#app { position: fixed; inset: 0; }

#canvas-wrap { position: absolute; inset: 0; }
#canvas-wrap canvas { display: block; }

/* ---------- 氛围层 ---------- */
.scanlines {
  position: absolute; inset: 0; pointer-events: none; z-index: 5;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.02) 0px,
    rgba(255, 255, 255, 0.02) 1px,
    transparent 1px,
    transparent 4px
  );
  /* 不使用 mix-blend-mode：避免与 WebGL 层每帧全屏合成的性能开销 */
}
.vignette {
  position: absolute; inset: 0; pointer-events: none; z-index: 5;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(2, 0, 10, 0.55) 100%);
  transition: background 0.6s ease;
}
/* 聚焦节点时压暗四周，视线收拢 */
body.focusing .vignette {
  background: radial-gradient(ellipse at center, transparent 42%, rgba(2, 0, 10, 0.8) 100%);
}

/* 四角 HUD 装饰 */
.hud-corner {
  position: absolute; width: 34px; height: 34px; z-index: 20;
  pointer-events: none; opacity: 0.8;
}
.hud-corner::before, .hud-corner::after {
  content: ""; position: absolute; background: var(--purple);
  box-shadow: 0 0 8px var(--purple);
}
.hud-corner::before { width: 100%; height: 2px; }
.hud-corner::after { width: 2px; height: 100%; }
.hud-corner.tl { top: 14px; left: 14px; }
.hud-corner.tr { top: 14px; right: 14px; transform: scaleX(-1); }
.hud-corner.bl { bottom: 14px; left: 14px; transform: scaleY(-1); }
.hud-corner.br { bottom: 14px; right: 14px; transform: scale(-1); }

/* ---------- 顶部 HUD ---------- */
#top-hud {
  position: absolute; top: 0; left: 0; right: 0; z-index: 30;
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 34px 0;
  pointer-events: none;
}
#top-hud > * { pointer-events: auto; }

.brand { display: flex; align-items: center; gap: 14px; }
/* 轨道星系 logo：核心脉冲 + 卫星环绕 + 六边形流转 */
.brand-mark {
  width: 46px; height: 46px; flex-shrink: 0;
  filter: drop-shadow(0 0 10px rgba(168, 85, 247, 0.5));
}
.brand-mark svg { display: block; overflow: visible; }
.bm-hex {
  transform-box: fill-box; transform-origin: center;
  animation: bmHexSpin 16s linear infinite;
  filter: drop-shadow(0 0 2.5px rgba(192, 132, 252, 0.9)) drop-shadow(0 0 7px rgba(34, 211, 238, 0.45));
}
@keyframes bmHexSpin { to { transform: rotate(360deg); } }
.bm-tilt {
  transform-box: fill-box; transform-origin: center;
}
.bm-tilt-a { animation: bmTiltA 20s linear infinite; }
.bm-tilt-b { animation: bmTiltB 26s linear infinite; }
@keyframes bmTiltA { from { transform: rotate(56deg); } to { transform: rotate(416deg); } }
@keyframes bmTiltB { from { transform: rotate(-56deg); } to { transform: rotate(-416deg); } }
.brand-text h1 {
  font-size: 21px; font-weight: 700; letter-spacing: 4px;
  background: linear-gradient(90deg, #fff, var(--purple));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-text span {
  font-size: 10px; letter-spacing: 3px; color: var(--text-dim);
  font-family: var(--mono);
}

.top-actions { display: flex; gap: 10px; }

/* ---------- 通用 HUD 按钮 ---------- */
.hud-btn {
  position: relative;
  padding: 9px 18px;
  background: rgba(20, 10, 44, 0.7);
  border: 1px solid var(--panel-border);
  color: var(--text);
  font-size: 13px; font-family: var(--font); letter-spacing: 1px;
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: all 0.25s ease;
  backdrop-filter: blur(6px);
}
.hud-btn:hover {
  border-color: var(--purple);
  box-shadow: 0 0 18px var(--purple-dim), inset 0 0 12px rgba(168, 85, 247, 0.15);
  color: #fff;
}
.hud-btn.primary {
  background: linear-gradient(120deg, rgba(168, 85, 247, 0.35), rgba(34, 211, 238, 0.25));
  border-color: var(--purple);
  box-shadow: 0 0 16px var(--purple-dim);
}
.hud-btn.icon { padding: 9px 12px; }
.hud-btn.active {
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.4), rgba(168, 85, 247, 0.4));
  border-color: var(--cyan);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.4);
}

/* ---------- 左侧金字塔面板 ---------- */
#layer-panel {
  position: absolute; left: 26px; top: 50%; transform: translateY(-50%);
  z-index: 25; width: 236px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  padding: 16px 16px 12px;
  backdrop-filter: blur(10px);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}
/* 内嵌细边框，双层面板质感 */
#layer-panel::after, #detail-panel::after, #tour-bar::after {
  content: ""; position: absolute; inset: 5px;
  border: 1px solid rgba(168, 85, 247, 0.12);
  pointer-events: none;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.panel-title {
  font-size: 13px; font-weight: 700; letter-spacing: 2px;
  padding-bottom: 10px; margin-bottom: 10px;
  border-bottom: 1px solid rgba(168, 85, 247, 0.25);
}
.panel-title span { display: block; font-size: 9px; color: var(--text-dim); font-family: var(--mono); letter-spacing: 2px; margin-top: 3px; }

#layer-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
#layer-list li {
  --lc: var(--purple);
  display: flex; flex-direction: column;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-left: 3px solid var(--lc);
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: all 0.25s ease;
}
#layer-list li:hover { background: rgba(168, 85, 247, 0.1); }
#layer-list li.active {
  background: linear-gradient(90deg, rgba(168, 85, 247, 0.22), transparent);
  border-color: var(--lc);
  box-shadow: 0 0 14px rgba(168, 85, 247, 0.25), inset 0 0 18px rgba(168, 85, 247, 0.1);
}
#layer-list .li-name { font-size: 12px; font-weight: 700; letter-spacing: 0.5px; color: var(--lc); }
#layer-list .li-ability { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
#layer-list li.active .li-ability { color: var(--text); }

.panel-foot {
  margin-top: 10px; padding-top: 8px;
  border-top: 1px dashed rgba(168, 85, 247, 0.25);
  font-size: 10px; color: var(--text-dim); line-height: 1.6;
}

/* ---------- 底部术语索引 ---------- */
#term-dock {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
  z-index: 25;
  display: flex; gap: 7px; flex-wrap: wrap; justify-content: center;
  max-width: min(92vw, 1060px);
}
.dock-chip {
  --cc: var(--purple);
  position: relative;
  display: flex; align-items: center; gap: 6px;
  padding: 9px 12px 7px;
  background: rgba(16, 8, 34, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.09);
  color: var(--text-dim);
  font-size: 12px; letter-spacing: 0.5px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: all 0.22s ease;
  white-space: nowrap;
}
/* 顶部层级色指示条 */
.dock-chip::before {
  content: ""; position: absolute; top: 0; left: 12%; right: 12%;
  height: 2px;
  background: var(--cc);
  box-shadow: 0 0 8px var(--cc);
  opacity: 0.55;
  transition: opacity 0.22s ease;
}
.dock-chip:hover::before, .dock-chip.active::before { opacity: 1; }
.dock-chip .num {
  font-family: var(--mono); font-size: 10px;
  color: var(--cc);
}
.dock-chip:hover {
  border-color: var(--cc); color: #fff;
  box-shadow: 0 0 14px color-mix(in srgb, var(--cc) 45%, transparent);
  transform: translateY(-2px);
}
.dock-chip.active {
  border-color: var(--cc);
  color: #fff;
  background: linear-gradient(120deg, color-mix(in srgb, var(--cc) 30%, transparent), rgba(16, 8, 34, 0.6));
  box-shadow: 0 0 16px color-mix(in srgb, var(--cc) 55%, transparent);
}

/* ---------- 作者署名 ---------- */
#author {
  position: absolute; right: 26px; bottom: 20px; z-index: 25;
  font-family: var(--mono);
  font-size: 11px; letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
}
#author::before {
  content: "◆"; color: var(--purple);
  margin-right: 8px; font-size: 8px;
  text-shadow: 0 0 8px var(--purple);
}
#author b { color: var(--text); font-weight: 600; }
#author .dept {
  letter-spacing: 1px;
  opacity: 0.8;
  margin-left: 6px;
}

/* ---------- 左下 HBADA Agent 链接徽章 ---------- */
#hbada-link {
  position: absolute; left: 26px; bottom: 20px; z-index: 25;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 15px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 2.5px;
  color: var(--text-dim); text-decoration: none;
  border: 1px solid rgba(34, 211, 238, 0.28);
  background: rgba(16, 8, 34, 0.55);
  backdrop-filter: blur(8px);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: all 0.25s ease;
}
#hbada-link::before {
  content: "◆"; color: var(--cyan); font-size: 8px;
  text-shadow: 0 0 8px var(--cyan);
}
#hbada-link::after {
  content: "↗"; font-size: 12px; color: var(--text-dim);
  transition: transform 0.25s ease, color 0.25s ease;
}
#hbada-link:hover {
  color: #fff;
  border-color: var(--cyan);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.35), inset 0 0 12px rgba(34, 211, 238, 0.08);
  transform: translateY(-2px);
}
#hbada-link:hover::after { transform: translate(2px, -2px); color: var(--cyan); }

/* ---------- 右侧详情面板 ---------- */
#detail-panel {
  position: absolute; top: 50%; right: 26px; z-index: 28;
  width: 372px; max-height: 78vh;
  transform: translate(calc(100% + 40px), -50%);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  padding: 24px 24px 18px;
  overflow-y: auto;
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
#detail-panel.open { transform: translate(0, -50%); }
#detail-panel::-webkit-scrollbar { width: 4px; }
#detail-panel::-webkit-scrollbar-thumb { background: var(--purple-dim); }

#dp-close {
  position: absolute; top: 12px; right: 12px;
  width: 28px; height: 28px;
  background: transparent; border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-dim); cursor: pointer; font-size: 12px;
  transition: all 0.2s;
}
#dp-close:hover { border-color: var(--pink); color: var(--pink); box-shadow: 0 0 10px rgba(255, 79, 216, 0.4); }

.dp-index { font-family: var(--mono); font-size: 11px; color: var(--cyan); letter-spacing: 2px; }
#dp-en {
  margin-top: 6px;
  font-size: 34px; font-weight: 800; letter-spacing: 1px; line-height: 1.1;
  background: linear-gradient(90deg, #fff, var(--purple));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  word-break: keep-all;
}
#dp-en.long { font-size: 25px; letter-spacing: 0; }
#dp-cn { font-size: 16px; color: var(--text); margin-top: 4px; letter-spacing: 2px; }
#dp-layer-tag {
  display: inline-block; margin-top: 10px;
  padding: 4px 10px; font-size: 11px; letter-spacing: 1px;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.08);
}
.dp-slogan {
  margin-top: 14px; padding: 10px 12px;
  font-size: 14px; font-weight: 600; color: #fff;
  border-left: 3px solid var(--purple);
  background: linear-gradient(90deg, rgba(168, 85, 247, 0.16), transparent);
  min-height: 20px;
}
.dp-slogan .cursor {
  display: inline-block; width: 8px; height: 15px;
  background: var(--purple); margin-left: 3px;
  animation: blink 0.8s step-end infinite;
  vertical-align: -2px;
}
@keyframes blink { 50% { opacity: 0; } }

.dp-desc { margin-top: 12px; font-size: 13px; line-height: 1.9; color: var(--text-dim); }

.dp-example { margin-top: 14px; font-size: 12.5px; line-height: 1.8; }
.dp-example .ex-label {
  display: flex; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: 2px; color: var(--cyan);
  font-family: var(--mono); margin-bottom: 10px;
}
.dp-example .ex-label::before { content: ""; width: 16px; height: 1px; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
.dp-example .ex-text { color: var(--text); background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07); padding: 12px; }

/* token chips */
.token-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.token-chips span {
  padding: 6px 11px;
  border: 1px solid var(--purple);
  color: #fff; font-size: 13px;
  background: rgba(168, 85, 247, 0.14);
  box-shadow: 0 0 10px rgba(168, 85, 247, 0.25), inset 0 0 8px rgba(168, 85, 247, 0.12);
  animation: chipIn 0.4s both;
}
@keyframes chipIn { from { opacity: 0; transform: translateY(8px) scale(0.85); } }

/* function calling steps */
.fc-steps { list-style: none; margin-top: 10px; }
.fc-steps li {
  position: relative;
  padding: 9px 12px 9px 34px;
  margin-bottom: 6px;
  background: rgba(34, 211, 238, 0.05);
  border: 1px solid rgba(34, 211, 238, 0.18);
  font-size: 12px; color: var(--text);
  animation: chipIn 0.4s both;
}
.fc-steps li::before {
  content: attr(data-n);
  position: absolute; left: 8px; top: 50%; transform: translateY(-50%);
  width: 18px; height: 18px;
  display: grid; place-items: center;
  font-size: 10px; font-family: var(--mono);
  color: #06222a; background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.5);
}

/* agent 雷达 + 形态 */
.radar-wrap { display: flex; gap: 14px; align-items: center; margin-top: 8px; }
.radar-wrap svg { flex-shrink: 0; }
.radar-legend { display: flex; flex-direction: column; gap: 5px; font-size: 11px; }
.radar-legend .rl-row { display: flex; align-items: center; gap: 7px; color: var(--text-dim); }
.radar-legend .rl-bar { flex: 1; height: 3px; background: rgba(255,255,255,0.08); min-width: 60px; }
.radar-legend .rl-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--purple), var(--cyan)); box-shadow: 0 0 6px var(--purple-dim); }
.agent-forms { display: flex; gap: 7px; margin-top: 12px; }
.agent-forms span {
  padding: 5px 12px; font-size: 11px;
  border: 1px solid rgba(255, 79, 216, 0.5); color: var(--pink);
  background: rgba(255, 79, 216, 0.08);
}

/* skill 书本对照表 */
.book-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 12px; }
.book-table th, .book-table td {
  border: 1px solid rgba(168, 85, 247, 0.25);
  padding: 8px 10px; text-align: left;
}
.book-table th { color: var(--cyan); font-weight: 600; background: rgba(34, 211, 238, 0.06); letter-spacing: 1px; }
.book-table td { color: var(--text); background: rgba(255, 255, 255, 0.02); }
.book-table td:last-child { color: var(--purple); font-family: var(--mono); font-size: 11px; }

/* memory chips */
.memory-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.memory-chips span {
  padding: 6px 12px; font-size: 12px; color: #fff;
  border: 1px solid rgba(96, 165, 250, 0.6);
  background: rgba(96, 165, 250, 0.12);
  box-shadow: 0 0 10px rgba(96, 165, 250, 0.2);
  animation: chipIn 0.4s both;
}
.memory-chips span::before { content: "◆ "; color: #60a5fa; font-size: 9px; }

/* rag 流程 */
.rag-flow { display: flex; align-items: center; gap: 6px; margin-top: 12px; flex-wrap: wrap; }
.rag-flow .rf-node {
  padding: 7px 10px; font-size: 11px; text-align: center;
  border: 1px solid rgba(74, 222, 128, 0.45); color: #b8f5cd;
  background: rgba(74, 222, 128, 0.07);
}
.rag-flow .rf-arrow { color: #4ade80; font-size: 13px; text-shadow: 0 0 8px #4ade80; }

/* harness 确认对话框 */
.reins { display: flex; flex-direction: column; gap: 6px; margin: 10px 0 14px; }
.reins div {
  padding: 8px 12px; font-size: 12px;
  border: 1px solid rgba(255, 79, 216, 0.35);
  background: rgba(255, 79, 216, 0.06);
  color: var(--text);
}
.reins div::before { content: "⛓ "; color: var(--pink); }
.confirm-box {
  border: 1px solid rgba(255, 204, 0, 0.4);
  background: rgba(20, 14, 4, 0.6);
  padding: 14px;
}
.confirm-box .cb-title { color: #ffcc00; font-size: 12px; letter-spacing: 2px; margin-bottom: 8px; }
.confirm-box .cb-title::before { content: "⚠ "; }
.confirm-box .cb-action { font-size: 13px; color: #fff; }
.confirm-box .cb-meta { font-size: 12px; color: var(--text-dim); margin-top: 5px; }
.confirm-box .cb-btns { display: flex; gap: 10px; margin-top: 12px; }
.confirm-box .cb-btns button {
  flex: 1; padding: 7px 0; font-size: 12px; cursor: pointer;
  font-family: var(--font); letter-spacing: 2px;
  transition: all 0.2s;
}
.cb-ok { border: 1px solid #4ade80; color: #4ade80; background: rgba(74, 222, 128, 0.08); }
.cb-ok:hover { background: rgba(74, 222, 128, 0.25); box-shadow: 0 0 12px rgba(74, 222, 128, 0.35); }
.cb-no { border: 1px solid #ff5f56; color: #ff5f56; background: rgba(255, 95, 86, 0.08); }
.cb-no:hover { background: rgba(255, 95, 86, 0.25); box-shadow: 0 0 12px rgba(255, 95, 86, 0.35); }
.cb-result { margin-top: 10px; font-size: 11px; font-family: var(--mono); min-height: 16px; }

.dp-nav { display: flex; justify-content: space-between; margin-top: 18px; }
.dp-nav .hud-btn { padding: 7px 14px; font-size: 12px; }

/* ---------- 导览控制条 ---------- */
#tour-bar {
  position: absolute; top: 86px; left: 50%; transform: translate(-50%, -80px);
  z-index: 29; width: min(480px, 86vw);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
  padding: 10px 16px 12px;
  opacity: 0; pointer-events: none;
  transition: all 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}
#tour-bar.show { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
.tb-progress { height: 3px; background: rgba(255, 255, 255, 0.08); margin-bottom: 9px; overflow: hidden; }
#tb-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  box-shadow: 0 0 10px var(--purple);
  transition: width 0.5s ease;
}
.tb-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
#tb-station {
  font-size: 12.5px; letter-spacing: 1px; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  flex: 1; min-width: 0;
}
#tb-station b { color: var(--cyan); font-family: var(--mono); margin-right: 6px; }
.tb-controls { display: flex; gap: 6px; }
.tb-controls button {
  width: 30px; height: 26px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text); cursor: pointer; font-size: 12px;
  transition: all 0.2s;
}
.tb-controls button:hover { border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 10px rgba(34, 211, 238, 0.35); }

/* ---------- 开场 ---------- */
#intro {
  position: absolute; inset: 0; z-index: 60;
  display: grid; place-items: center;
  background: radial-gradient(ellipse at 50% 40%, rgba(46, 16, 101, 0.5), rgba(5, 1, 13, 0.92) 70%);
  backdrop-filter: blur(3px);
  transition: opacity 0.9s ease, visibility 0.9s;
}
#intro.hide { opacity: 0; visibility: hidden; pointer-events: none; }
.intro-inner { text-align: center; padding: 0 24px; max-width: 860px; }
.intro-eyebrow {
  font-size: 13px; letter-spacing: 6px; color: var(--text-dim);
  margin-bottom: 18px;
  animation: fadeUp 0.8s 0.2s both;
}
.intro-title {
  font-size: clamp(44px, 8vw, 88px); font-weight: 900; letter-spacing: 12px;
  background: linear-gradient(100deg, #fff 10%, var(--purple) 45%, var(--cyan) 80%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 26px rgba(168, 85, 247, 0.55));
  animation: fadeUp 0.8s 0.4s both;
}
.intro-terms {
  margin-top: 22px;
  font-family: var(--mono); font-size: clamp(10px, 1.6vw, 13px);
  letter-spacing: 2px; color: var(--cyan);
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
  animation: fadeUp 0.8s 0.6s both;
  max-width: 720px; margin-left: auto; margin-right: auto;
  line-height: 2.1;
  word-break: break-word;
}
.intro-sub {
  margin-top: 16px; font-size: 14px; line-height: 2; color: var(--text-dim);
  animation: fadeUp 0.8s 0.75s both;
}
#btn-enter {
  margin-top: 38px;
  padding: 15px 58px;
  font-size: 16px; letter-spacing: 8px; font-family: var(--font); font-weight: 700;
  color: #fff;
  background: linear-gradient(120deg, rgba(168, 85, 247, 0.4), rgba(34, 211, 238, 0.3));
  border: 1px solid var(--purple);
  cursor: pointer;
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
  box-shadow: 0 0 30px rgba(168, 85, 247, 0.4), inset 0 0 20px rgba(168, 85, 247, 0.15);
  transition: all 0.3s;
  animation: fadeUp 0.8s 0.9s both, pulseGlow 2.4s 1.6s infinite;
}
#btn-enter:hover { box-shadow: 0 0 46px rgba(168, 85, 247, 0.75), inset 0 0 26px rgba(168, 85, 247, 0.3); transform: translateY(-2px); }
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 30px rgba(168, 85, 247, 0.4), inset 0 0 20px rgba(168, 85, 247, 0.15); }
  50% { box-shadow: 0 0 48px rgba(168, 85, 247, 0.7), inset 0 0 26px rgba(168, 85, 247, 0.28); }
}
.intro-hint { margin-top: 20px; font-size: 11px; color: rgba(155, 143, 199, 0.6); letter-spacing: 1px; animation: fadeUp 0.8s 1.05s both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(22px); } }

/* ---------- 加载 ---------- */
#loading {
  position: absolute; inset: 0; z-index: 70;
  display: grid; place-items: center;
  background: var(--bg);
  transition: opacity 0.6s ease, visibility 0.6s;
}
#loading.hide { opacity: 0; visibility: hidden; }
.loader-ring {
  width: 54px; height: 54px;
  border: 2px solid rgba(168, 85, 247, 0.15);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  box-shadow: 0 0 24px rgba(168, 85, 247, 0.25);
}
.loader-text { position: absolute; margin-top: 110px; font-size: 12px; letter-spacing: 4px; color: var(--text-dim); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- HUD 淡入 ---------- */
.hud-fade { opacity: 0; transition: opacity 0.8s ease; }
body.entered .hud-fade { opacity: 1; }
body.no-anim *, body.no-anim *::before, body.no-anim *::after {
  transition: none !important;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  #layer-panel { display: none; }
}
@media (max-width: 760px) {
  #detail-panel { width: calc(100vw - 40px); right: 20px; max-height: 62vh; top: auto; bottom: 12px; transform: translateY(calc(100% + 30px)); }
  #detail-panel.open { transform: translateY(0); }
  #author { display: none; }
  #hbada-link { display: none; }
  .brand-text h1 { font-size: 16px; letter-spacing: 2px; }
  #top-hud { padding: 16px 18px 0; }
}