:root {
  --color-blue: #4a90e2;
  --color-blue-strong: #367bd0;
  --color-lake: #5dade2;
  --color-orange: #ff9500;
  --color-orange-strong: #ff7f11;
  --color-yellow: #ffcc00;
  --color-red: #ff3b30;
  --color-green: #42c49c;
  --color-purple: #9a78ff;
  --color-pink: #ff89be;
  --color-ink: #24323f;
  --color-text: #334455;
  --color-text-soft: #64748b;
  --color-paper: rgba(255, 255, 255, 0.94);
  --color-panel: rgba(255, 252, 242, 0.97);
  --color-panel-blue: rgba(242, 249, 255, 0.97);
  --border-heavy: 3px solid var(--color-ink);
  --border-light: 2px solid var(--color-ink);
  --shadow-soft: 0 10px 0 rgba(36, 50, 63, 0.05), 0 18px 28px rgba(36, 50, 63, 0.08);
  --shadow-float: 0 12px 0 rgba(36, 50, 63, 0.06), 0 22px 34px rgba(36, 50, 63, 0.12);
  --radius-xl: 34px;
  --radius-lg: 26px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--color-text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  line-height: 1.65;
  background:
    radial-gradient(circle at 10% 8%, rgba(255, 255, 255, 0.9), transparent 18%),
    radial-gradient(circle at 92% 12%, rgba(255, 255, 255, 0.75), transparent 18%),
    linear-gradient(180deg, #e8f5ff 0%, #def2ff 28%, #f6fbff 58%, #fff5d7 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

.kid-page {
  min-height: 100vh;
}

.container {
  position: relative;
  z-index: 1;
}

.kid-navbar {
  background: rgba(255, 250, 240, 0.95) !important;
  backdrop-filter: blur(12px);
  border-bottom: var(--border-heavy);
  box-shadow: 0 8px 0 rgba(36, 50, 63, 0.04), 0 14px 26px rgba(36, 50, 63, 0.08);
}

.brand-wrap {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-wrap > span {
  display: flex;
  flex-direction: column;
}

.brand-mascot {
  border: var(--border-heavy);
  border-radius: 50%;
  background: #fff;
  padding: 4px;
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.06);
}

.brand-title {
  display: block;
  color: var(--color-blue-strong);
  font-family: "YouYuan", "Microsoft YaHei", sans-serif;
  font-size: 1.08rem;
  font-weight: 900;
  line-height: 1.2;
}

.brand-subtitle {
  display: block;
  color: var(--color-text-soft);
  font-size: 0.76rem;
}

.nav-link {
  color: var(--color-ink) !important;
  padding: 0.55rem 1rem !important;
  border-radius: 999px;
  border: 2px solid transparent;
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  background: rgba(255, 204, 0, 0.22);
  border-color: var(--color-ink);
  transform: translateY(-1px);
}

.hero-panel,
.page-hero,
.ai-hero,
.feature-card,
.knowledge-card,
.history-sidebar,
.chat-main,
.helper-toolbar,
.safety-banner,
.promise-card,
.mini-guide-card,
.task-panel,
.task-card,
.mode-card,
.side-safe-card {
  border: var(--border-heavy);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
}

.hero-section {
  padding: 2rem 0 1rem;
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(340px, 0.94fr);
  gap: 28px;
  padding: 2rem;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.88), transparent 24%),
    linear-gradient(180deg, #fffef7 0%, #eef8ff 52%, #fff4d2 100%);
  overflow: hidden;
}

.hero-panel-v2 {
  background:
    radial-gradient(circle at 88% 10%, rgba(255, 255, 255, 0.9), transparent 22%),
    radial-gradient(circle at 18% 84%, rgba(255, 255, 255, 0.6), transparent 16%),
    linear-gradient(180deg, #fffdf8 0%, #edf8ff 52%, #fff1c8 100%);
}

.hero-copy h1,
.page-hero h1,
.ai-hero h1 {
  margin: 0.85rem 0 0.75rem;
  color: var(--color-blue-strong);
  font-family: "YouYuan", "Microsoft YaHei", sans-serif;
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  font-weight: 900;
  line-height: 1.18;
}

.hero-lead,
.page-hero p,
.ai-hero p,
.section-desc,
.feature-card p,
.mini-guide-card p,
.history-intro p,
.toolbar-row p,
.footer-inner p,
.task-card p,
.mode-card p,
.side-safe-card p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 1.02rem;
}

.hero-actions,
.hero-note-list,
.hero-mission-row,
.filter-chip-group,
.rainbow-actions,
.quick-question,
.mode-pill-group,
.footer-links,
.promise-list,
.knowledge-badge-row,
.category-showcase {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 1.45rem;
}

.hero-note-list,
.hero-mission-row {
  margin-top: 1rem;
}

.hero-note-list span,
.promise-list span,
.mission-chip,
.mini-badge,
.category-badge {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0.5rem 0.92rem;
  border: 2px dashed var(--color-ink);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  font-weight: 800;
}

.mission-chip {
  border-style: solid;
  background: rgba(255, 204, 0, 0.18);
}

.mini-badge {
  min-height: 32px;
  padding: 0.28rem 0.7rem;
  border-style: solid;
  font-size: 0.82rem;
  background: rgba(74, 144, 226, 0.1);
}

.category-badge {
  border-style: solid;
  background: rgba(255, 255, 255, 0.78);
}

.kid-badge,
.feature-tag,
.scene-chip,
.scene-step-tag,
.history-tab,
.filter-chip,
.quick-btn,
.rainbow-pill {
  border: var(--border-light);
  border-radius: 999px;
  font-weight: 900;
}

.kid-badge {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0.42rem 0.88rem;
  background: rgba(74, 144, 226, 0.16);
  box-shadow: 0 4px 0 rgba(36, 50, 63, 0.05);
  color: var(--color-ink);
  font-size: 0.92rem;
}

.kid-badge-yellow {
  background: rgba(255, 204, 0, 0.2);
}

.kid-badge-small {
  min-height: 34px;
  padding: 0.3rem 0.72rem;
  font-size: 0.84rem;
}

.btn-kid,
.btn-blue,
.btn-orange,
.kid-outline-btn,
.filter-chip,
.history-tab,
.quick-btn,
.rainbow-pill,
.preset-button,
.scenario-card {
  min-height: 48px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.btn-kid:hover,
.btn-blue:hover,
.btn-orange:hover,
.kid-outline-btn:hover,
.filter-chip:hover,
.history-tab:hover,
.quick-btn:hover,
.rainbow-pill:hover,
.scene-card:hover,
.feature-card:hover,
.knowledge-card:hover,
.task-card:hover,
.mode-card:hover,
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
}

.btn-kid:active,
.btn-blue:active,
.btn-orange:active,
.kid-outline-btn:active,
.filter-chip:active,
.history-tab:active,
.quick-btn:active,
.rainbow-pill:active,
.scenario-card:active,
.scene-card:active {
  transform: translateY(-1px) scale(0.98);
}

.btn-kid:disabled,
.btn-blue:disabled,
.btn-orange:disabled,
.kid-outline-btn:disabled,
.quick-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-blue,
.btn-orange {
  padding: 0.82rem 1.35rem;
  border: var(--border-heavy);
  border-radius: var(--radius-md);
  color: #fff !important;
  font-weight: 900;
}

.btn-blue {
  background: linear-gradient(135deg, var(--color-blue), var(--color-lake));
}

.btn-orange {
  background: linear-gradient(135deg, var(--color-orange), var(--color-orange-strong));
}

.btn-green {
  padding: 0.82rem 1.35rem;
  border: var(--border-heavy);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-green), #67d8b4);
  color: #fff !important;
  font-weight: 900;
}

.btn-send {
  min-width: 108px;
}

.kid-outline-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1rem;
  border: var(--border-heavy);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-ink);
  font-weight: 900;
}

.kid-outline-btn-sm {
  min-height: 40px;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.hero-visual {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: var(--border-heavy);
  border-radius: 30px;
  background: linear-gradient(180deg, #eefaff 0%, #f8fff0 54%, #fff6db 100%);
  overflow: hidden;
}

.hero-visual-v2 {
  background:
    radial-gradient(circle at 20% 16%, rgba(255, 255, 255, 0.78), transparent 18%),
    linear-gradient(180deg, #eefaff 0%, #f8fff0 54%, #fff6db 100%);
}

.cloud,
.star,
.floating-dot {
  position: absolute;
  pointer-events: none;
}

.cloud {
  width: 88px;
  height: 38px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 20px 8px 0 rgba(255, 255, 255, 0.82), 42px 0 0 rgba(255, 255, 255, 0.95);
}

.cloud-a {
  top: 34px;
  left: 20px;
}

.cloud-b {
  top: 84px;
  right: 60px;
  transform: scale(0.88);
}

.star-a {
  top: 18px;
  right: 20px;
  font-size: 1.45rem;
  animation: float-star 3.2s ease-in-out infinite;
}

.star-b {
  left: 42px;
  bottom: 72px;
  font-size: 1.2rem;
  animation: float-star 2.8s ease-in-out infinite;
}

.floating-dot {
  border-radius: 50%;
  opacity: 0.82;
}

.dot-a {
  top: 48px;
  left: 140px;
  width: 12px;
  height: 12px;
  background: rgba(255, 204, 0, 0.56);
}

.dot-b {
  right: 90px;
  bottom: 110px;
  width: 16px;
  height: 16px;
  background: rgba(74, 144, 226, 0.26);
}

.dot-c {
  left: 72px;
  bottom: 132px;
  width: 10px;
  height: 10px;
  background: rgba(255, 137, 190, 0.44);
}

@keyframes float-star {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.speech-bubble {
  position: absolute;
  right: 18px;
  bottom: 18px;
  max-width: 250px;
  padding: 0.9rem 1rem;
  border: var(--border-heavy);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.05);
  font-weight: 800;
}

.speech-bubble-v2 {
  max-width: 280px;
}

.illustration-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
  border: var(--border-heavy);
  border-radius: 28px;
  background: linear-gradient(180deg, #fffef9 0%, #ecfff6 100%);
  box-shadow: 0 8px 0 rgba(36, 50, 63, 0.05);
  color: var(--color-ink);
}

.illustration-badge {
  display: inline-flex;
  padding: 0.24rem 0.65rem;
  border: var(--border-light);
  border-radius: 999px;
  background: rgba(66, 196, 156, 0.15);
  font-size: 0.76rem;
  font-weight: 900;
}

.illustration-icon {
  font-size: 2rem;
  line-height: 1;
}

.illustration-slot h2,
.illustration-slot strong {
  font-size: 1rem;
  font-weight: 900;
}

.illustration-slot p,
.illustration-slot code {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-text-soft);
}

.illustration-slot code {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: rgba(36, 50, 63, 0.06);
}

.slot-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.illustration-hero {
  width: min(320px, 78%);
  min-height: 270px;
  padding: 1rem;
}

.illustration-scene {
  min-height: 126px;
  padding: 0.78rem;
}

.illustration-mini {
  width: 146px;
  min-width: 146px;
  min-height: 146px;
  padding: 0.8rem;
}

.illustration-card {
  width: 136px;
  min-width: 136px;
  min-height: 136px;
  padding: 0.85rem;
  background: linear-gradient(180deg, #fffef9 0%, #fff5dc 100%);
}

.illustration-warning {
  width: 170px;
  min-width: 170px;
  min-height: 150px;
  padding: 0.85rem;
  background: linear-gradient(180deg, #fffef7 0%, #fff0d6 100%);
}

.section-block {
  padding: 1.25rem 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin-bottom: 1.2rem;
}

.section-title {
  margin: 0.45rem 0 0;
  color: var(--color-blue-strong);
  font-family: "YouYuan", "Microsoft YaHei", sans-serif;
  font-size: clamp(1.82rem, 3vw, 2.45rem);
  font-weight: 900;
}

.rainbow-actions,
.scene-grid,
.feature-grid,
.knowledge-grid,
.task-panel,
.mode-card-row,
.scenario-card-grid {
  display: grid;
  gap: 18px;
}

.rainbow-actions {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.scene-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scene-grid-v2 {
  align-items: stretch;
}

.feature-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.knowledge-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.task-panel {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 1.15rem;
  background: linear-gradient(180deg, #fffdf7 0%, #eefbff 100%);
}

.mode-card-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.3rem;
}

.scenario-card-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 1rem;
}

.rainbow-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.7rem 0.95rem;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.05);
  text-align: center;
}

.rainbow-pill.warm { background: rgba(255, 149, 0, 0.16); }
.rainbow-pill.cool { background: rgba(74, 144, 226, 0.14); }
.rainbow-pill.sunny { background: rgba(255, 204, 0, 0.2); }
.rainbow-pill.mint { background: rgba(66, 196, 156, 0.15); }
.rainbow-pill.pink { background: rgba(255, 137, 190, 0.14); }
.rainbow-pill.violet { background: rgba(154, 120, 255, 0.14); }

.scene-card,
.feature-card,
.task-card,
.mode-card,
.scenario-card {
  display: block;
  padding: 1.15rem;
  border: var(--border-heavy);
  border-radius: 28px;
  box-shadow: var(--shadow-soft);
}

.scene-card {
  height: 100%;
}

.scene-card-v2 {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.scene-card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.scene-chip,
.scene-step-tag {
  display: inline-flex;
  padding: 0.3rem 0.7rem;
  background: rgba(255, 255, 255, 0.8);
  font-size: 0.82rem;
}

.scene-step-tag {
  background: rgba(255, 204, 0, 0.18);
}

.scene-card h3,
.feature-card h2,
.task-card h3,
.mode-card h3,
.side-safe-card h3 {
  margin: 0;
  color: var(--color-blue-strong);
  font-family: "YouYuan", "Microsoft YaHei", sans-serif;
  font-weight: 900;
}

.scene-card h3,
.task-card h3,
.mode-card h3,
.side-safe-card h3 {
  font-size: 1.2rem;
}

.feature-card h2 {
  font-size: 1.48rem;
}

.scene-mini-list,
.feature-card ul {
  margin: 0;
  padding-left: 1rem;
  color: var(--color-text-soft);
}

.scene-mini-list li,
.feature-card li {
  margin-bottom: 0.28rem;
}

.scene-link {
  margin-top: auto;
  color: var(--color-orange-strong);
  font-weight: 900;
}

.feature-card-v2 {
  background: linear-gradient(180deg, #fffef7 0%, #fff8e2 100%);
}

.feature-card-blue {
  background: linear-gradient(180deg, #fffef7 0%, #edf8ff 100%);
}

.feature-card-green {
  background: linear-gradient(180deg, #fffef7 0%, #eafff5 100%);
}

.feature-tag {
  display: inline-flex;
  padding: 0.35rem 0.75rem;
  background: rgba(255, 204, 0, 0.2);
  font-size: 0.88rem;
}

.task-card {
  display: flex;
  align-items: start;
  gap: 12px;
  background: rgba(255, 255, 255, 0.85);
}

.task-icon,
.mode-card-icon,
.scenario-icon {
  width: 54px;
  height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--border-heavy);
  border-radius: 18px;
  background: #fff;
  font-size: 1.5rem;
  flex: 0 0 auto;
}

.mode-card {
  display: flex;
  gap: 12px;
  align-items: start;
  background: rgba(255, 255, 255, 0.84);
}

.mode-card-blue {
  background: linear-gradient(180deg, rgba(74, 144, 226, 0.12) 0%, rgba(255, 255, 255, 0.9) 100%);
}

.mode-card-orange {
  background: linear-gradient(180deg, rgba(255, 149, 0, 0.14) 0%, rgba(255, 255, 255, 0.9) 100%);
}

.mode-card-green {
  background: linear-gradient(180deg, rgba(66, 196, 156, 0.15) 0%, rgba(255, 255, 255, 0.9) 100%);
}

.page-hero,
.ai-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 24px;
  padding: 1.7rem;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.86), transparent 24%),
    linear-gradient(180deg, #fffef7 0%, #edf8ff 58%, #fff4d4 100%);
}

.page-hero-copy,
.ai-hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-hero-v2,
.ai-hero-v2 {
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.88), transparent 26%),
    linear-gradient(180deg, #fffef8 0%, #eef8ff 58%, #fff4d0 100%);
}

.mini-guide-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: linear-gradient(180deg, #fffef7 0%, #fff5d9 100%);
}

.magic-search {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 60px;
  padding: 0.85rem 1rem;
  border: var(--border-heavy);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.04);
}

.magic-search i {
  color: var(--color-blue-strong);
  font-size: 1.1rem;
}

.magic-search input {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  color: var(--color-ink);
  font-size: 1rem;
}

.filter-chip {
  padding: 0.72rem 1rem;
  background: rgba(255, 255, 255, 0.88);
  color: var(--color-ink);
}

.filter-chip.active,
.history-tab.active {
  color: #fff;
  background: linear-gradient(135deg, var(--color-green), #66d8b3);
}

.knowledge-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: linear-gradient(180deg, #fffef8 0%, #fff9e8 100%);
}

.knowledge-card-v2 {
  box-shadow: 0 10px 0 rgba(36, 50, 63, 0.05), 0 18px 30px rgba(36, 50, 63, 0.1);
}

.knowledge-top {
  display: flex;
  gap: 1rem;
  align-items: start;
  padding: 1.2rem 1.2rem 1rem;
  border-bottom: var(--border-heavy);
}

.knowledge-copy {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.knowledge-top h2 {
  margin: 0;
  color: var(--color-blue-strong);
  font-family: "YouYuan", "Microsoft YaHei", sans-serif;
  font-size: 1.5rem;
  font-weight: 900;
}

.knowledge-top p {
  margin: 0;
  color: var(--color-text-soft);
}

.knowledge-tag {
  display: inline-flex;
  padding: 0.32rem 0.7rem;
  border: var(--border-light);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  font-size: 0.82rem;
  font-weight: 800;
}

.knowledge-body {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
  padding: 1.2rem;
  flex: 1;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.step-card {
  min-height: 122px;
  padding: 0.9rem;
  border: var(--border-heavy);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.05);
}

.step-card b {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 0.45rem;
  border: var(--border-light);
  border-radius: 50%;
  background: rgba(255, 204, 0, 0.24);
}

.step-card p {
  margin: 0;
  font-size: 0.94rem;
}

.danger-note,
.memory-line,
.risk-warning,
.no-result-card,
.chat-top-tip {
  padding: 0.92rem 1rem;
  border: var(--border-heavy);
  border-radius: 20px;
}

.danger-note,
.risk-warning {
  background: rgba(255, 59, 48, 0.08);
  color: #b3362d;
  font-weight: 800;
}

.memory-line {
  background: rgba(255, 204, 0, 0.18);
  color: #8d6700;
  font-weight: 900;
}

.video-container {
  overflow: hidden;
  border: var(--border-heavy);
  border-radius: 22px;
  background: #0d1222;
  aspect-ratio: 16 / 9;
}

.video-container video,
.video-container iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: none;
  object-fit: cover;
}

.no-result-card {
  margin-top: 1.5rem;
  background: rgba(255, 255, 255, 0.92);
  text-align: center;
  color: var(--color-text-soft);
}

.ai-helper-container {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.history-sidebar {
  padding: 1rem;
  background: linear-gradient(180deg, #fffef6 0%, #fff5d7 100%);
}

.history-intro {
  display: flex;
  gap: 0.95rem;
  align-items: center;
  padding: 0.95rem;
  border: var(--border-heavy);
  border-radius: 24px;
  background: linear-gradient(180deg, #fff3c4 0%, #fff9e4 100%);
  margin-bottom: 1rem;
}

.history-intro-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: var(--border-heavy);
  border-radius: 20px;
  background: #fff;
  font-size: 1.6rem;
}

.history-intro h2 {
  margin: 0;
  color: var(--color-blue-strong);
  font-size: 1.16rem;
  font-weight: 900;
}

.history-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 0.85rem;
}

.history-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 0.85rem;
}

.history-tab {
  padding: 0.72rem 0.6rem;
  background: #fff;
  color: var(--color-ink);
  text-align: center;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 48vh;
  overflow: auto;
}

.history-item {
  padding: 0.9rem;
  border: var(--border-heavy);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.05);
  cursor: pointer;
}

.history-preview {
  color: var(--color-ink);
  font-size: 0.95rem;
  font-weight: 900;
}

.history-time {
  margin-top: 4px;
  color: var(--color-text-soft);
  font-size: 0.78rem;
}

.side-safe-card {
  margin-top: 0.95rem;
  padding: 1rem;
  background: linear-gradient(180deg, #fff7d2 0%, #fff0c2 100%);
}

.chat-main {
  min-width: 0;
  padding: 1rem;
  background: linear-gradient(180deg, #fffef8 0%, #eef9ff 100%);
}

.helper-toolbar {
  padding: 1rem;
  margin-bottom: 1rem;
  background: linear-gradient(180deg, #fffef8 0%, #fff4de 100%);
}

.toolbar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 1rem;
}

.toolbar-title {
  margin: 0;
  color: var(--color-blue-strong);
  font-size: 1.14rem;
  font-weight: 900;
}

.mode-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.42rem 0.9rem;
  border: var(--border-light);
  border-radius: 999px;
  font-weight: 900;
}

.mode-pill-blue {
  background: rgba(74, 144, 226, 0.14);
}

.mode-pill-orange {
  background: rgba(255, 149, 0, 0.18);
  color: #8f5a00;
}

.preset-button.is-active {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-float);
}

.quick-area + .quick-area {
  margin-top: 0.9rem;
}

.quick-area-title {
  margin-bottom: 0.55rem;
  color: var(--color-ink);
  font-size: 1rem;
  font-weight: 900;
}

.quick-btn {
  padding: 0.68rem 0.96rem;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-ink);
  box-shadow: 0 5px 0 rgba(36, 50, 63, 0.05);
}

.scenario-card {
  display: flex;
  flex-direction: column;
  align-items: start;
  gap: 8px;
  text-align: left;
  background: rgba(255, 255, 255, 0.88);
}

.scenario-card strong {
  color: var(--color-blue-strong);
  font-size: 1.02rem;
}

.scenario-card span:last-child {
  color: var(--color-text-soft);
  font-size: 0.9rem;
}

.chat-container {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 70vh;
  border: var(--border-heavy);
  border-radius: 28px;
  background: linear-gradient(180deg, #fffef7 0%, #eef8ff 100%);
  box-shadow: var(--shadow-soft);
}

.chat-container-v2 {
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.76), transparent 18%),
    linear-gradient(180deg, #fffef7 0%, #eef8ff 100%);
}

.voice-assist-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 12px 12px 0;
  padding: 0.9rem 1rem;
  border: var(--border-heavy);
  border-radius: 22px;
  background: linear-gradient(180deg, #fffdf6 0%, #edf8ff 100%);
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.04);
}

.voice-assist-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--color-text-soft);
  font-size: 0.9rem;
}

.voice-assist-copy strong {
  color: var(--color-blue-strong);
  font-size: 1rem;
}

.voice-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.voice-btn,
.voice-input-btn,
.speak-message-button {
  min-height: 42px;
  padding: 0.52rem 0.85rem;
  border: var(--border-light);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-ink);
  font-size: 0.88rem;
  font-weight: 900;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.voice-btn:hover,
.voice-input-btn:hover,
.speak-message-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 7px 0 rgba(36, 50, 63, 0.05), 0 12px 18px rgba(36, 50, 63, 0.1);
}

.voice-btn.is-on,
.voice-input-btn.is-listening {
  background: linear-gradient(135deg, var(--color-green), #67d8b4);
  color: #fff;
}

.voice-btn.is-unsupported,
.voice-input-btn.is-unsupported {
  opacity: 0.55;
  cursor: not-allowed;
}

.speak-message-button {
  margin-top: 10px;
  background: rgba(74, 144, 226, 0.12);
}

.chat-top-tip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 12px 0;
  background: rgba(255, 255, 255, 0.82);
  color: var(--color-text-soft);
  font-size: 0.88rem;
  font-weight: 800;
}

.chat-window {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.7), transparent 18%),
    linear-gradient(180deg, #fffef8 0%, #eef7ff 100%);
}

.user-message,
.ai-message {
  position: relative;
  max-width: 76%;
  margin: 0.8rem 0;
  padding: 0.95rem 1rem;
  border: var(--border-heavy);
  box-shadow: 0 6px 0 rgba(36, 50, 63, 0.05);
  line-height: 1.7;
  word-break: break-word;
}

.user-message::before,
.ai-message::before {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.8rem;
  font-weight: 900;
}

.user-message {
  margin-left: auto;
  border-radius: 24px 24px 8px 24px;
  background: linear-gradient(180deg, #fff4e8 0%, #ffd89f 100%);
  color: #7e4b00;
}

.user-message::before {
  content: "我";
}

.ai-message {
  border-radius: 24px 24px 24px 8px;
  background: linear-gradient(180deg, #ffffff 0%, #ebfff5 100%);
  color: #1c3850;
}

.ai-message::before {
  content: "急救小卫士";
  color: var(--color-blue-strong);
}

.ai-message.loading {
  color: var(--color-text-soft);
}

.input-box {
  display: flex;
  gap: 10px;
  padding: 12px;
  background: #fff;
  border-top: var(--border-heavy);
}

.input-box input {
  flex: 1;
  min-height: 50px;
  padding: 0.92rem 1rem;
  border: var(--border-heavy);
  border-radius: 20px;
  outline: none;
  font-size: 0.98rem;
}

.input-box input:focus {
  border-color: var(--color-blue-strong);
  box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.14);
}

.input-tip {
  padding: 0 12px 12px;
  background: #fff;
  text-align: right;
  color: var(--color-text-soft);
  font-size: 0.82rem;
}

.input-tip #charCounter.limit {
  color: var(--color-red);
  font-weight: 900;
}

.loading-spinner {
  width: 14px;
  height: 14px;
  display: inline-block;
  margin-right: 6px;
  border: 2px solid rgba(74, 144, 226, 0.2);
  border-top-color: rgba(74, 144, 226, 0.9);
  border-radius: 50%;
  vertical-align: -2px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.validation-badge {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.82rem;
}

.validation-badge.pass {
  color: var(--color-text-soft);
}

.validation-badge.pass .check {
  margin-right: 6px;
  color: var(--color-green);
}

.validation-badge.fail {
  display: inline-flex;
  padding: 0.42rem 0.72rem;
  border: var(--border-light);
  border-radius: 14px;
  background: rgba(255, 59, 48, 0.08);
  color: #b3362d;
}

.sources {
  margin-top: 8px;
  color: var(--color-text-soft);
  font-size: 0.82rem;
}

.feedback-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.feedback-button {
  border-radius: 999px;
  padding: 0.42rem 0.85rem;
  font-size: 0.82rem;
  border-width: 2px;
}

.feedback-button:disabled {
  opacity: 0.64;
  cursor: not-allowed;
}

.feedback-sent {
  margin-top: 8px;
  color: var(--color-blue-strong);
  font-size: 0.82rem;
  font-weight: 800;
}

.safety-banner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 1.1rem 1.25rem;
  background: linear-gradient(180deg, #fff6cd 0%, #ffeab5 100%);
}

.safety-banner-icon {
  width: 64px;
  height: 64px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--border-heavy);
  border-radius: 20px;
  background: #fff;
  flex: 0 0 auto;
  font-size: 1.7rem;
}

.safety-banner-copy {
  flex: 1;
}

.safety-banner-copy h2 {
  margin: 0 0 0.25rem;
  color: #a86b00;
  font-family: "YouYuan", "Microsoft YaHei", sans-serif;
  font-size: 1.45rem;
  font-weight: 900;
}

.safety-banner-copy p {
  margin: 0;
  color: #7d5900;
  font-weight: 800;
}

.kid-footer {
  margin-top: 1.2rem;
  padding: 1.45rem 0;
  background: #253240;
  color: #fff;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.footer-inner strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 1.03rem;
}

.footer-inner p {
  color: rgba(255, 255, 255, 0.72);
}

.footer-links a {
  color: #fff;
  font-weight: 800;
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 54px;
  height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--border-heavy);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-blue), var(--color-lake));
  color: #fff;
  box-shadow: 0 8px 0 rgba(36, 50, 63, 0.05), 0 14px 20px rgba(74, 144, 226, 0.2);
  opacity: 0;
  transform: translateY(18px);
  pointer-events: none;
  transition: 0.25s ease;
  z-index: 60;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.tone-warm {
  background: linear-gradient(180deg, #fff4e5 0%, #fffdf7 100%);
}

.tone-cool {
  background: linear-gradient(180deg, #edf8ff 0%, #fffdf8 100%);
}

.tone-sunny {
  background: linear-gradient(180deg, #fff9d9 0%, #fffef7 100%);
}

.tone-mint {
  background: linear-gradient(180deg, #ecfff7 0%, #fffef8 100%);
}

.tone-pink {
  background: linear-gradient(180deg, #fff1f7 0%, #fffef8 100%);
}

.tone-violet {
  background: linear-gradient(180deg, #f3efff 0%, #fffef8 100%);
}

.tone-rescue {
  background: linear-gradient(180deg, #fff0f3 0%, #fffef8 100%);
}

.tone-disaster {
  background: linear-gradient(180deg, #eef2ff 0%, #fffef8 100%);
}

@media (max-width: 1200px) {
  .rainbow-actions,
  .scene-grid,
  .knowledge-grid,
  .scenario-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 992px) {
  .hero-panel,
  .page-hero,
  .ai-hero,
  .ai-helper-container {
    grid-template-columns: 1fr;
  }

  .task-panel,
  .mode-card-row {
    grid-template-columns: 1fr;
  }

  .step-grid {
    grid-template-columns: 1fr;
  }

  .safety-banner {
    flex-wrap: wrap;
  }

  .speech-bubble {
    position: static;
    max-width: 100%;
    margin: 1rem;
  }

  .history-list {
    max-height: 34vh;
  }
}

@media (max-width: 768px) {
  .rainbow-actions,
  .scene-grid,
  .feature-grid,
  .knowledge-grid,
  .scenario-card-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .page-hero,
  .ai-hero,
  .chat-main,
  .history-sidebar {
    padding: 1.2rem;
  }

  .mini-guide-card,
  .promise-card,
  .safety-banner,
  .voice-assist-panel,
  .toolbar-row,
  .footer-inner,
  .knowledge-top,
  .task-card,
  .mode-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .illustration-mini,
  .illustration-card,
  .illustration-warning {
    width: 100%;
    min-width: 0;
  }

  .user-message,
  .ai-message {
    max-width: 88%;
  }
}

@media (max-width: 576px) {
  .hero-copy h1,
  .page-hero h1,
  .ai-hero h1 {
    font-size: 1.84rem;
  }

  .input-box {
    flex-direction: column;
  }

  .voice-controls,
  .voice-btn,
  .voice-input-btn {
    width: 100%;
  }

  .btn-send {
    width: 100%;
  }

  .history-tabs {
    grid-template-columns: 1fr;
  }

  .chat-container {
    min-height: 74vh;
  }
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.46);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb {
  background: rgba(74, 144, 226, 0.4);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(74, 144, 226, 0.65);
}