/* ===== 变量 ===== */
:root {
  --bg-deep: #12100e;
  --bg-dark: #1a1714;
  --bg-panel: #24201b;
  --bg-card: #2d2820;
  --bg-hover: #353028;
  --bg-input: #3d362c;
  --border: #4a4035;
  --border-light: #5a5045;
  --text-primary: #e8ddd0;
  --text-secondary: #b0a090;
  --text-dim: #807060;
  --accent: #c49040;
  --accent-glow: rgba(196, 144, 64, 0.25);
  --success: #5a9a50;
  --danger: #c45050;
  --warning: #d4a030;
}

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

html, body {
  width: 100%; height: 100%;
  font-family: "Noto Serif SC", "Source Han Serif CN", "SimSun", serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-deep);
  overflow: hidden;
}

/* ===== 纹理背景 ===== */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E"),
    radial-gradient(ellipse at 25% 20%, rgba(196, 144, 64, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 75% 80%, rgba(140, 100, 40, 0.04) 0%, transparent 50%),
    linear-gradient(165deg, #161210 0%, #1e1a14 40%, #181410 100%);
  z-index: -1; pointer-events: none;
}

/* ===== 画面切换 ===== */
.screen {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  opacity: 0; visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}
.screen.active { opacity: 1; visibility: visible; }

/* ===== 首次登录取名 ===== */
#intro-screen {
  align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse at center, rgba(0, 0, 0, 0.6) 0%, transparent 70%),
    linear-gradient(180deg, #0a0806 0%, #1a1410 50%, #0a0806 100%);
}

.intro-content {
  text-align: center;
  padding: 2rem;
  max-width: 450px;
}

.intro-logo {
  display: flex; align-items: center; justify-content: center; gap: 0.8rem;
  margin-bottom: 0.5rem;
}

.intro-icon {
  font-size: 2rem;
  animation: catPulse 3s ease-in-out infinite;
}

@keyframes catPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

.intro-title {
  font-size: 2.2rem; font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.3em;
}

.intro-subtitle {
  font-size: 0.75rem; color: var(--text-dim);
  letter-spacing: 0.5em;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.intro-text {
  margin-bottom: 2rem;
}

.intro-text p {
  color: var(--text-secondary); font-size: 0.9rem;
  margin-bottom: 0.6rem;
  line-height: 1.8;
}

.intro-form {
  display: flex; flex-direction: column;
  gap: 0.8rem;
  align-items: center;
}

.intro-form label {
  color: var(--text-dim); font-size: 0.85rem;
}

.intro-form input {
  width: 280px;
  padding: 0.6rem 0.8rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-primary);
  font-family: inherit; font-size: 1rem;
  text-align: center;
  outline: none;
}

.intro-form input:focus {
  border-color: var(--accent);
}

.intro-form input::placeholder {
  color: var(--text-dim);
}

.intro-divider {
  color: var(--text-dim);
  font-size: 0.8rem;
  margin: 0.3rem 0;
}

.import-area {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.import-area textarea {
  width: 280px;
  min-height: 80px;
  padding: 0.6rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  resize: vertical;
}

/* ===== 存档码导出 ===== */
.export-panel { max-width: 520px; }

.export-hint {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 1rem;
  line-height: 1.7;
}

#export-code {
  width: 100%;
  min-height: 100px;
  padding: 0.8rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-primary);
  font-family: monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
  margin-bottom: 1rem;
  word-break: break-all;
}

/* ===== 按钮 ===== */
.btn {
  font-family: inherit; cursor: pointer; border: none; outline: none;
  transition: all 0.2s ease;
}

.btn-primary {
  padding: 0.7rem 2rem;
  background: linear-gradient(135deg, var(--accent), #a07028);
  color: var(--bg-deep); font-weight: 600;
  letter-spacing: 0.1em; border-radius: 2px;
  box-shadow: 0 2px 10px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-icon {
  padding: 0.4rem 0.9rem;
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  font-size: 0.85rem; border-radius: 2px;
  border: 1px solid transparent;
}
.btn-icon:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.08);
  border-color: var(--border);
}

.btn-accent {
  background: rgba(196, 144, 64, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}
.btn-accent:hover {
  background: rgba(196, 144, 64, 0.25);
}

.btn-back {
  background: none; color: var(--text-secondary);
  font-size: 0.9rem; padding: 0.3rem 0.6rem;
}
.btn-back:hover { color: var(--text-primary); }

.btn-close {
  background: none; color: var(--text-dim);
  font-size: 1.4rem; padding: 0.2rem 0.5rem;
}
.btn-close:hover { color: var(--text-primary); }

.badge {
  display: inline-block; min-width: 18px; height: 18px;
  line-height: 18px; text-align: center; padding: 0 5px;
  font-size: 0.72rem; background: var(--accent);
  color: var(--bg-deep); border-radius: 9px; font-weight: 600;
}

/* ===== 总部主页 ===== */
#hq-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.8rem 1.5rem;
  background: rgba(18, 16, 14, 0.9);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.logo {
  display: flex; align-items: center; gap: 0.5rem;
}
.logo-icon {
  color: var(--accent); font-size: 1.2rem;
}
.logo-text {
  font-size: 1.15rem; font-weight: 600;
  color: var(--text-primary); letter-spacing: 0.15em;
}

.player-info {
  display: flex; align-items: center; gap: 0.5rem;
}
.player-label {
  color: var(--text-dim); font-size: 0.8rem;
}
.player-name {
  color: var(--accent); font-size: 0.9rem;
}

.hq-body {
  display: flex; flex: 1; overflow: hidden;
}

/* 左侧导航 */
#hq-nav {
  width: 200px;
  background: rgba(26, 22, 18, 0.7);
  border-right: 1px solid var(--border);
  padding: 1rem 0;
  display: flex; flex-direction: column;
  flex-shrink: 0;
}

.nav-item {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.7rem 1.2rem;
  background: none; border: none;
  color: var(--text-secondary);
  font-family: inherit; font-size: 0.9rem;
  cursor: pointer; text-align: left;
  transition: all 0.2s ease;
  position: relative;
}
.nav-item:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.03);
}
.nav-item.active {
  color: var(--accent);
  background: rgba(196, 144, 64, 0.08);
  border-left: 2px solid var(--accent);
}
.nav-icon { font-size: 1rem; }
.nav-badge {
  margin-left: auto;
  background: var(--danger); color: #fff;
  font-size: 0.7rem; padding: 0.1rem 0.4rem;
  border-radius: 8px;
}

/* 主区域 */
#hq-main {
  flex: 1; overflow-y: auto; padding: 1.5rem 2rem;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.tab-title {
  font-size: 1.3rem; color: var(--text-primary);
  margin-bottom: 1.2rem; letter-spacing: 0.1em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* 邮件列表 */
.email-list { display: flex; flex-direction: column; gap: 0.6rem; }

.email-card {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.email-card:hover {
  border-color: var(--border-light);
  background: var(--bg-hover);
}
.email-card.unread {
  border-left: 3px solid var(--accent);
}
.email-card.unread .email-card-title {
  color: var(--text-primary); font-weight: 600;
}

.email-card-icon {
  font-size: 1.4rem; color: var(--text-dim);
}
.email-card.unread .email-card-icon {
  color: var(--accent);
}

.email-card-body { flex: 1; }
.email-card-title {
  font-size: 0.95rem; color: var(--text-secondary);
  margin-bottom: 0.2rem;
}
.email-card-meta {
  font-size: 0.78rem; color: var(--text-dim);
}

.email-card-status {
  font-size: 0.75rem; padding: 0.2rem 0.5rem;
  border-radius: 2px;
}
.email-card-status.new {
  background: rgba(196, 144, 64, 0.15);
  color: var(--accent);
}
.email-card-status.investigating {
  background: rgba(90, 154, 80, 0.15);
  color: var(--success);
}
.email-card-status.closed {
  background: rgba(128, 112, 96, 0.15);
  color: var(--text-dim);
}

/* 案件列表 */
.case-list { display: flex; flex-direction: column; gap: 0.6rem; }

.case-card {
  padding: 1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.case-card:hover {
  border-color: var(--border-light);
  background: var(--bg-hover);
}
.case-card-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.4rem;
}
.case-card-title {
  font-size: 1rem; color: var(--text-primary);
}
.case-card-status {
  font-size: 0.75rem; padding: 0.15rem 0.5rem;
  border-radius: 2px;
}
.case-card-status.ongoing {
  background: rgba(196, 144, 64, 0.15); color: var(--accent);
}
.case-card-status.solved {
  background: rgba(90, 154, 80, 0.15); color: var(--success);
}
.case-card-summary {
  font-size: 0.85rem; color: var(--text-secondary);
  line-height: 1.6;
}

/* 关于我们 */
.about-content {
  max-width: 600px;
}
.about-content p {
  margin-bottom: 1rem; color: var(--text-secondary);
}
.about-stats {
  display: flex; gap: 2rem;
  margin-top: 1.5rem; padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 1.8rem; font-weight: 600;
  color: var(--accent);
}
.stat-label {
  font-size: 0.8rem; color: var(--text-dim);
  margin-top: 0.2rem;
}

/* ===== 邮件阅读页 ===== */
.email-header {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.7rem 1.5rem;
  background: rgba(18, 16, 14, 0.9);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.email-header-title {
  color: var(--text-secondary); font-size: 0.9rem;
}

.email-body {
  flex: 1; overflow-y: auto;
  max-width: 700px; margin: 0 auto;
  padding: 2rem 1.5rem;
}

.email-meta {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.email-meta > div {
  margin-bottom: 0.3rem;
  color: var(--text-secondary); font-size: 0.9rem;
}
.email-meta strong { color: var(--text-dim); }

.email-text {
  color: var(--text-primary); line-height: 1.9;
}
.email-text p {
  margin-bottom: 1em; text-indent: 2em;
}

.email-actions {
  margin-top: 2rem;
  text-align: center;
}

/* ===== 调查场景 ===== */
#investigation-screen {
  background: var(--bg-deep);
}

#invest-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.6rem 1.2rem;
  background: rgba(18, 16, 14, 0.9);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.invest-header-left, .invest-header-right {
  display: flex; align-items: center; gap: 0.8rem;
}

.case-title {
  color: var(--accent); font-size: 0.95rem;
  letter-spacing: 0.1em;
}

.invest-body {
  display: flex; flex: 1; overflow: hidden;
}

/* 场景导航 */
#scene-nav {
  width: 180px;
  background: rgba(26, 22, 18, 0.6);
  border-right: 1px solid var(--border);
  padding: 1rem 0;
  flex-shrink: 0;
  overflow-y: auto;
}

.scene-nav-title {
  padding: 0 1rem;
  color: var(--text-dim); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.scene-nav-item {
  display: block; width: 100%;
  padding: 0.5rem 1rem;
  background: none; border: none;
  color: var(--text-secondary);
  font-family: inherit; font-size: 0.85rem;
  text-align: left; cursor: pointer;
  transition: all 0.2s ease;
  border-left: 2px solid transparent;
}
.scene-nav-item:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.03);
}
.scene-nav-item.active {
  color: var(--accent);
  background: rgba(196, 144, 64, 0.08);
  border-left-color: var(--accent);
}
.scene-nav-item.locked {
  color: var(--text-dim);
  cursor: not-allowed;
}

/* 主场景区 */
#scene-main {
  flex: 1; overflow-y: auto; padding: 1.5rem 2rem;
}

.scene-current-name {
  font-size: 1.1rem; color: var(--accent);
  margin-bottom: 0.8rem; letter-spacing: 0.1em;
}

.scene-desc {
  color: var(--text-primary); line-height: 1.9;
  margin-bottom: 1.5rem;
}
.scene-desc p {
  margin-bottom: 0.8em; text-indent: 2em;
}

/* 场景中的物品 */
.scene-section-title {
  font-size: 0.8rem; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.15em;
  margin: 1.5rem 0 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}

.scene-items { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.scene-item-btn {
  padding: 0.4rem 0.9rem;
  background: rgba(255,255,255,0.04);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-family: inherit; font-size: 0.85rem;
  cursor: pointer; border-radius: 2px;
  transition: all 0.2s ease;
}
.scene-item-btn:hover {
  color: var(--text-highlight);
  border-color: var(--accent);
  background: rgba(196, 144, 64, 0.08);
}
.scene-item-btn.examined {
  color: var(--text-dim);
  border-style: dotted;
  cursor: default;
}
.scene-item-btn.examined:hover {
  color: var(--text-dim);
  border-color: var(--border);
  background: rgba(255,255,255,0.04);
}

/* 人物 */
.scene-people { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.person-btn {
  padding: 0.4rem 0.9rem;
  background: rgba(196, 144, 64, 0.08);
  color: var(--accent);
  border: 1px solid rgba(196, 144, 64, 0.2);
  font-family: inherit; font-size: 0.85rem;
  cursor: pointer; border-radius: 2px;
  transition: all 0.2s ease;
}
.person-btn:hover {
  background: rgba(196, 144, 64, 0.15);
  border-color: var(--accent);
}

/* 响应输出 */
#scene-output {
  margin-top: 1.5rem;
}

.output-block {
  margin-bottom: 0.8rem;
  padding: 0.9rem 1.1rem;
  background: rgba(196, 144, 64, 0.05);
  border-left: 2px solid var(--accent);
  border-radius: 0 3px 3px 0;
  color: var(--text-primary);
  font-size: 0.92rem;
  line-height: 1.8;
  animation: fadeIn 0.3s ease;
}

.output-block.from-person {
  border-left-color: var(--success);
  background: rgba(90, 154, 80, 0.05);
}

.output-block.clue-found {
  border-left-color: var(--warning);
  background: rgba(212, 160, 48, 0.08);
}

/* ===== 浮层通用 ===== */
.overlay {
  position: fixed; inset: 0;
  background: rgba(8, 6, 4, 0.85);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.overlay.active { opacity: 1; visibility: visible; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  max-width: 520px; width: 90%;
  max-height: 80vh;
  display: flex; flex-direction: column;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

.panel-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
.panel-header h2 {
  font-size: 1.05rem; color: var(--accent);
  letter-spacing: 0.1em;
}

.panel-body {
  padding: 1.2rem; overflow-y: auto; flex: 1;
}

/* ===== 对话浮层 ===== */
.dialogue-panel { max-width: 560px; }

.dialogue-content {
  padding: 1rem 1.2rem;
  color: var(--text-primary); line-height: 1.8;
  max-height: 45vh; overflow-y: auto;
}

.dialogue-line {
  margin-bottom: 0.8rem;
  padding: 0.7rem 0.9rem;
  background: rgba(255,255,255,0.03);
  border-radius: 3px;
}
.dialogue-line.you {
  border-left: 2px solid var(--accent);
  margin-left: 1rem;
}
.dialogue-line.them {
  border-left: 2px solid var(--success);
}

.dialogue-options {
  padding: 0.8rem 1.2rem;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 0.4rem;
}

.dialogue-option {
  padding: 0.5rem 0.8rem;
  background: rgba(255,255,255,0.04);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-family: inherit; font-size: 0.88rem;
  cursor: pointer; border-radius: 2px;
  text-align: left;
  transition: all 0.2s ease;
}
.dialogue-option:hover {
  color: var(--text-primary);
  border-color: var(--accent);
  background: rgba(196, 144, 64, 0.08);
}

/* ===== 线索本 ===== */
#clue-list { display: flex; flex-direction: column; gap: 0.7rem; }

.clue-item {
  padding: 0.7rem;
  background: rgba(255,255,255,0.03);
  border-left: 2px solid var(--accent);
  border-radius: 0 3px 3px 0;
}
.clue-item-name {
  font-weight: 600; color: var(--accent);
  margin-bottom: 0.2rem; font-size: 0.9rem;
}
.clue-item-desc {
  color: var(--text-secondary); font-size: 0.85rem;
  line-height: 1.6;
}
.clue-item-scene {
  color: var(--text-dim); font-size: 0.75rem;
  margin-top: 0.2rem;
}
.empty-clues {
  color: var(--text-dim); text-align: center;
  padding: 2rem 0; font-style: italic;
}

/* ===== 推理面板 ===== */
.deduction-panel { max-width: 600px; }

.deduction-hint {
  color: var(--text-secondary); font-size: 0.88rem;
  margin-bottom: 1rem; line-height: 1.7;
}

#deduction-input {
  width: 100%; min-height: 140px;
  padding: 0.8rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-primary);
  font-family: inherit; font-size: 0.92rem;
  line-height: 1.7; resize: vertical;
  outline: none; margin-bottom: 1rem;
}
#deduction-input:focus { border-color: var(--accent); }

#deduction-result {
  margin-top: 1rem;
  padding: 0.8rem;
  border-radius: 3px;
  font-size: 0.9rem;
  line-height: 1.7;
  display: none;
}
#deduction-result.show { display: block; }
#deduction-result.success {
  background: rgba(90, 154, 80, 0.1);
  border: 1px solid rgba(90, 154, 80, 0.3);
  color: var(--success);
}
#deduction-result.partial {
  background: rgba(212, 160, 48, 0.1);
  border: 1px solid rgba(212, 160, 48, 0.3);
  color: var(--warning);
}
#deduction-result.wrong {
  background: rgba(196, 80, 80, 0.1);
  border: 1px solid rgba(196, 80, 80, 0.3);
  color: var(--danger);
}

/* ===== 结案报告 ===== */
#report-screen {
  align-items: center; justify-content: center;
  overflow-y: auto;
  padding: 2rem 0;
  background:
    radial-gradient(ellipse at center, rgba(196, 144, 64, 0.1) 0%, transparent 60%),
    linear-gradient(180deg, #12100e 0%, #1a1714 100%);
}

.report-content {
  max-width: 600px; width: 90%;
  text-align: center; padding: 2rem;
}

.report-title {
  font-size: 1.8rem; color: var(--accent);
  letter-spacing: 0.2em; margin-bottom: 0.5rem;
}

.report-divider {
  width: 80px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  margin: 1rem auto;
}

.report-body {
  text-align: left; color: var(--text-secondary);
  line-height: 1.9; margin-bottom: 2rem;
}
.report-body p {
  margin-bottom: 0.8em; text-indent: 2em;
}

/* ===== 提示消息 ===== */
.toast {
  position: fixed; bottom: 80px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 0.6rem 1.5rem;
  background: var(--bg-panel);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  border-radius: 3px; font-size: 0.9rem;
  opacity: 0; z-index: 200; pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  white-space: nowrap;
}
.toast.show {
  opacity: 1; transform: translateX(-50%) translateY(0);
}

/* ===== 动画 ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  #hq-nav { width: 60px; }
  .nav-label { display: none; }
  #scene-nav { width: 140px; }
}

@media (max-width: 480px) {
  /* ===== 总部底部导航 ===== */
  #hq-nav {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    width: 100%; height: auto;
    flex-direction: row;
    justify-content: space-around;
    padding: 0.3rem 0;
    border-top: 1px solid var(--border);
    border-right: none;
    z-index: 100;
    background: rgba(18, 16, 14, 0.95);
    backdrop-filter: blur(10px);
  }
  #hq-nav .nav-item {
    flex: 1;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.4rem 0;
    border-left: none;
    border-bottom: 2px solid transparent;
    text-align: center;
    font-size: 0.7rem;
  }
  #hq-nav .nav-item.active {
    border-left: none;
    border-bottom: 2px solid var(--accent);
    background: none;
  }
  #hq-nav .nav-label { display: block; font-size: 0.65rem; }
  #hq-nav .nav-icon { font-size: 1.1rem; }

  /* ===== 场景底部导航 ===== */
  #scene-nav {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    width: 100%; height: auto;
    flex-direction: row;
    padding: 0.3rem 0;
    border-top: 1px solid var(--border);
    border-right: none;
    z-index: 100;
    background: rgba(18, 16, 14, 0.95);
    backdrop-filter: blur(10px);
    overflow-x: auto;
  }
  .scene-nav-title { display: none; }
  #scene-nav-items {
    display: flex;
    flex-direction: row;
    width: 100%;
  }
  .scene-nav-item {
    flex: 1;
    padding: 0.5rem 0.3rem;
    border-left: none;
    border-bottom: 2px solid transparent;
    text-align: center;
    font-size: 0.75rem;
    white-space: nowrap;
  }
  .scene-nav-item.active {
    border-left: none;
    border-bottom: 2px solid var(--accent);
    background: none;
  }

  /* 主内容区留出底部空间 */
  #hq-main, #scene-main {
    padding: 1rem;
    padding-bottom: 5rem;
  }
}