/* ============================================
   M3 专家门诊 - styles.css  v3 · Refined
   设计语言: 极简留白 · 细线 · 微光 · 玻璃质感
   灵感: Apple Health · Linear · Stripe · Vercel
   ============================================ */

/* ============================================
   1) 色板 & Token
   ============================================ */
:root {
  /* 主色 — 收敛到一支清冷的薄荷绿（医疗 + 科技）*/
  --primary: #00A98F;
  --primary-soft: #E6F7F3;
  --primary-glow: rgba(0, 169, 143, 0.20);

  /* 中性色 — 偏冷灰，留白感强 */
  --ink: #0A0E14;            /* 最重的字 */
  --ink-2: #2A3340;          /* 正文 */
  --ink-3: #5E6B7A;          /* 次要 */
  --ink-4: #9AA5B5;          /* 占位 / 弱化 */
  --ink-5: #C6CED8;          /* 分隔线之上 */

  --paper: #FBFCFD;          /* 页底 */
  --paper-2: #FFFFFF;        /* 卡片 */
  --paper-3: #F4F6F9;        /* 输入背景 */

  --line: #EAEEF3;           /* 极细分隔线 */
  --line-2: #D8DEE6;         /* 强调描边 */

  /* 状态色 */
  --emergency: #E55353;
  --emergency-soft: #FBE9E9;
  --warning: #DCA76A;
  --success: #2EBC8F;
  --info: #5C8FE5;

  /* 旧 token 兼容(app.js 引用) */
  --text: var(--ink-2);
  --text-2: var(--ink-3);
  --text-3: var(--ink-4);
  --bg: var(--paper);
  --bg-2: var(--paper-2);
  --card: var(--paper-2);
  --border: var(--line);
  --border-strong: var(--line-2);
  --primary-dark: #00876F;
  --primary-light: var(--primary-soft);
  --accent: var(--info);
  --accent-light: #ECF1FB;
  --emergency-dark: #C13B3B;
  --emergency-light: var(--emergency-soft);

  /* 圆角 */
  --r-xs: 6px;
  --r-sm: 10px;
  --r: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --radius: var(--r);
  --radius-sm: var(--r-sm);
  --radius-lg: var(--r-lg);

  /* 阴影 — 极轻 */
  --shadow-sm: 0 1px 2px rgba(10, 14, 20, 0.04);
  --shadow: 0 4px 14px rgba(10, 14, 20, 0.06);
  --shadow-lg: 0 12px 40px rgba(10, 14, 20, 0.08);
  --shadow-glow: 0 0 0 4px var(--primary-glow);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter",
               "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei UI", system-ui, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter",
                  "PingFang SC", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  /* 气泡 */
  --user-bubble: var(--ink);
  --user-bubble-text: #fff;
  --ai-bubble: var(--paper-2);
  --ai-bubble-text: var(--ink-2);
  --input-bg: var(--paper-3);
  --input-focus-bg: #fff;

  /* 缓动 */
  --ease: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --primary: #2EE5BD;
  --primary-soft: rgba(46, 229, 189, 0.10);
  --primary-glow: rgba(46, 229, 189, 0.30);

  --ink: #F5F7FA;
  --ink-2: #DDE3EC;
  --ink-3: #8E9AAB;
  --ink-4: #5C6878;
  --ink-5: #3B4452;

  --paper: #0A0D12;
  --paper-2: #11151B;
  --paper-3: #161B23;

  --line: #1E242E;
  --line-2: #2A3340;

  --user-bubble: var(--primary);
  --user-bubble-text: #0A0D12;
  --ai-bubble: var(--paper-2);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
}

/* ============================================
   2) Reset & 基础
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "liga", "calt", "ss01";
  letter-spacing: -0.005em;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
  min-height: 100vh;
}
img, svg, video { display: block; max-width: 100%; }
a { color: var(--primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--ink); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: 15px; color: inherit; }
::selection { background: var(--primary-glow); color: var(--ink); }

/* Subtle scrollbar */
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--ink-5); border-radius: 4px; }
*::-webkit-scrollbar-thumb:hover { background: var(--ink-4); }
[data-theme="dark"] *::-webkit-scrollbar-thumb { background: var(--line-2); }

/* ============================================
   3) 顶栏
   ============================================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s, border-color 0.3s;
}
.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; color: inherit; }
.brand-mark {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: var(--ink);
  color: var(--paper);
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0;
  transition: transform 0.3s var(--ease-out), background 0.3s;
}
[data-theme="dark"] .brand-mark { background: var(--primary); color: var(--paper); }
.brand:hover .brand-mark { transform: scale(1.05) rotate(-3deg); }
.brand-text { line-height: 1.15; }
.brand-name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand-sub {
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
  margin-top: 1px;
}

.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.nav a {
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-3);
  border-radius: 8px;
  transition: all 0.15s;
  letter-spacing: -0.005em;
}
.nav a:hover { color: var(--ink); background: var(--paper-3); }
.nav a.active { color: var(--ink); background: var(--paper-3); }

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: transparent;
  display: grid; place-items: center;
  transition: background 0.15s;
  font-size: 16px;
}
.theme-toggle:hover { background: var(--paper-3); }
.icon-sun, .icon-moon { transition: opacity 0.2s, transform 0.3s; }
[data-theme="light"] .icon-moon, [data-theme="dark"] .icon-sun { display: none; }

.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px;
  background: var(--paper-3);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-3);
  font-family: var(--font-mono);
  letter-spacing: 0;
}
.status-pill .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--ink-4);
  box-shadow: 0 0 0 0 var(--ink-4);
}
.status-pill.online .dot {
  background: var(--success);
  animation: pulse-dot 2.4s infinite var(--ease);
}
.status-pill.online.vision .dot { background: var(--primary); }
.status-pill.error .dot { background: var(--emergency); }
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--success) 40%, transparent); }
  70% { box-shadow: 0 0 0 6px transparent; }
}

/* ============================================
   4) 语言切换器
   ============================================ */
.lang-switcher {
  display: inline-flex;
  background: var(--paper-3);
  border-radius: 999px;
  padding: 2px;
  border: 1px solid var(--line);
}
.lang-btn {
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-3);
  border-radius: 999px;
  transition: all 0.15s;
  letter-spacing: 0.02em;
}
.lang-btn:hover { color: var(--ink); }
.lang-btn.active {
  background: var(--paper-2);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .lang-btn.active { background: var(--line-2); }

/* ============================================
   5) 急救 FAB
   ============================================ */
.emergency-fab {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 90;
  display: flex; align-items: center; gap: 8px;
  padding: 12px 18px;
  background: var(--emergency);
  color: white;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  box-shadow: 0 8px 24px rgba(229, 83, 83, 0.35), 0 0 0 1px rgba(255,255,255,0.1) inset;
  transition: all 0.25s var(--ease-out);
}
.emergency-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(229, 83, 83, 0.45);
  color: white;
}
.emergency-fab-icon { font-size: 16px; }

/* ============================================
   6) 容器 / Hero / Section
   ============================================ */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 28px;
}

.hero {
  text-align: center;
  padding: 56px 24px 40px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 16px;
}
.hero p {
  font-size: 16px;
  color: var(--ink-3);
  max-width: 620px;
  margin: 0 auto;
  letter-spacing: -0.005em;
}
.hero-tags {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  margin-top: 28px;
}
.hero-tag {
  padding: 6px 12px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-3);
  font-weight: 500;
  transition: all 0.2s;
  letter-spacing: -0.005em;
}
.hero-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 48px 0 20px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.section-title .count {
  font-size: 12px;
  color: var(--ink-4);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  font-family: var(--font-mono);
}

/* ============================================
   7) Alert bar
   ============================================ */
.alert-bar {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 20px;
  background: var(--emergency-soft);
  border: 1px solid color-mix(in srgb, var(--emergency) 25%, transparent);
  border-radius: var(--r);
  margin-bottom: 36px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.6;
}
[data-theme="dark"] .alert-bar {
  background: color-mix(in srgb, var(--emergency) 12%, transparent);
}
.alert-icon { font-size: 18px; flex-shrink: 0; }
.alert-bar strong { color: var(--emergency-dark); font-weight: 600; }
[data-theme="dark"] .alert-bar strong { color: #FF8888; }

/* ============================================
   8) 智能导诊 box
   ============================================ */
.triage-box {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s;
}
.triage-box:hover { box-shadow: var(--shadow); }

.triage-box-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.015em;
  margin-bottom: 6px;
}
.triage-box-hint {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 18px;
}
.triage-input-row {
  display: flex;
  gap: 10px;
}
.triage-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--paper-3);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-size: 14px;
  color: var(--ink);
  transition: all 0.15s;
}
.triage-input::placeholder { color: var(--ink-4); }
.triage-input:focus {
  outline: none;
  background: var(--paper-2);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}
.triage-submit {
  padding: 12px 22px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all 0.15s var(--ease-out);
  white-space: nowrap;
}
.triage-submit:hover {
  background: var(--ink-2);
  transform: translateY(-1px);
}
.triage-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
[data-theme="dark"] .triage-submit { background: var(--primary); color: var(--paper); }
[data-theme="dark"] .triage-submit:hover { background: color-mix(in srgb, var(--primary) 88%, white); }

.quick-symptoms {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 14px;
}
.quick-symptom {
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-3);
  cursor: pointer;
  transition: all 0.15s;
}
.quick-symptom:hover {
  border-color: var(--ink-4);
  color: var(--ink);
  background: var(--paper-3);
}

.triage-result {
  margin-top: 20px;
  padding: 18px;
  background: var(--paper-3);
  border-radius: var(--r-sm);
  border-left: 3px solid var(--primary);
}
.triage-urgency {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.005em;
}
.triage-urgency.normal { color: var(--success); }
.triage-urgency.semi { color: var(--warning); }
.triage-urgency.urgent { color: var(--emergency); }
.triage-advice {
  font-size: 14px;
  color: var(--ink-2);
  margin-bottom: 14px;
  padding: 12px 14px;
  background: var(--paper-2);
  border-radius: var(--r-sm);
}
.triage-recommend-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-4);
  font-weight: 600;
  margin-bottom: 10px;
}
.triage-rec-list { display: flex; flex-direction: column; gap: 8px; }
.triage-rec {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
}
.triage-rec:hover {
  border-color: var(--dept-color, var(--primary));
  transform: translateX(2px);
  box-shadow: var(--shadow-sm);
}
.triage-rec-icon { font-size: 20px; }
.triage-rec-info { flex: 1; min-width: 0; }
.triage-rec-name { font-weight: 600; color: var(--ink); font-size: 14px; }
.triage-rec-reason { font-size: 12px; color: var(--ink-3); margin-top: 2px; }
.triage-rec-conf {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--dept-color, var(--primary));
  letter-spacing: -0.02em;
}

/* ============================================
   9) 搜索框
   ============================================ */
.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: all 0.15s;
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}
.search-icon { color: var(--ink-4); font-size: 14px; }
.search-input {
  flex: 1;
  padding: 12px 0;
  background: transparent;
  border: none;
  outline: none;
  font-size: 14px;
  color: var(--ink);
}
.search-input::placeholder { color: var(--ink-4); }
.search-clear {
  display: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--paper-3);
  color: var(--ink-3);
  font-size: 16px;
  line-height: 1;
}
.search-clear.show { display: grid; place-items: center; }
.search-clear:hover { background: var(--ink-5); color: var(--ink); }

/* ============================================
   10) 科室卡片
   ============================================ */
.dept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.dept-card {
  position: relative;
  padding: 20px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s var(--ease-out);
}
.dept-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--r);
  padding: 1px;
  background: linear-gradient(135deg, var(--dept-color), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.dept-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.dept-card:hover::before { opacity: 1; }

.dept-icon {
  font-size: 24px;
  margin-bottom: 12px;
  display: inline-block;
  filter: grayscale(0.1);
}
.dept-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.dept-desc {
  font-size: 12.5px;
  color: var(--ink-3);
  line-height: 1.55;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dept-scenarios {
  display: flex; flex-wrap: wrap; gap: 4px;
}
.dept-scenario {
  font-size: 10.5px;
  padding: 2px 8px;
  background: var(--paper-3);
  color: var(--ink-3);
  border-radius: 4px;
  letter-spacing: 0;
}
.dept-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-4);
  font-size: 14px;
}

/* ============================================
   11) 诊断页 header
   ============================================ */
.diagnose-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.diagnose-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--dept-color, var(--primary)) 0%, transparent 50%);
  opacity: 0.04;
  pointer-events: none;
}
.diagnose-header-icon {
  font-size: 32px;
  width: 56px; height: 56px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--dept-color, var(--primary)) 12%, transparent);
  border-radius: var(--r-sm);
  flex-shrink: 0;
}
.diagnose-header-info { flex: 1; min-width: 0; }
.diagnose-header-info h2 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.015em;
  margin-bottom: 2px;
}
.diagnose-header-info p {
  font-size: 13px;
  color: var(--ink-3);
}
.back-btn {
  padding: 8px 14px;
  background: var(--paper-3);
  color: var(--ink-2);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
}
.back-btn:hover { background: var(--line); color: var(--ink); }

.diagnose-page { display: flex; flex-direction: column; gap: 20px; }

/* ============================================
   12) Form card
   ============================================ */
.form-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.form-section { margin-bottom: 24px; }
.form-section:last-child { margin-bottom: 0; }
.form-section-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.badge {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 999px;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
}
.badge.req {
  background: var(--emergency-soft);
  color: var(--emergency-dark);
}
.badge.opt {
  background: var(--paper-3);
  color: var(--ink-4);
}
[data-theme="dark"] .badge.req {
  background: color-mix(in srgb, var(--emergency) 18%, transparent);
  color: #FF9999;
}

.symptom-chips {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.symptom-chip {
  padding: 6px 12px;
  background: var(--paper-3);
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--ink-3);
  cursor: pointer;
  transition: all 0.15s;
}
.symptom-chip:hover { color: var(--ink); }
.symptom-chip.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
[data-theme="dark"] .symptom-chip.active {
  background: var(--primary);
  color: var(--paper);
  border-color: var(--primary);
}

.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field label {
  font-size: 12px;
  color: var(--ink-3);
  font-weight: 500;
}
.form-field input,
.form-field textarea,
.form-field select {
  padding: 11px 14px;
  background: var(--paper-3);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 14px;
  color: var(--ink);
  transition: all 0.15s;
  width: 100%;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--ink-4); }
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  background: var(--paper-2);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}
.form-field textarea {
  resize: vertical;
  min-height: 96px;
  font-family: var(--font-sans);
  line-height: 1.6;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

/* 上传区 */
.upload-zone {
  position: relative;
  padding: 32px 20px;
  background: var(--paper-3);
  border: 1.5px dashed var(--ink-5);
  border-radius: var(--r);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.upload-zone-icon { font-size: 24px; margin-bottom: 8px; opacity: 0.6; }
.upload-zone-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
}
.upload-zone-hint {
  font-size: 11.5px;
  color: var(--ink-4);
  margin-top: 6px;
  letter-spacing: 0;
}
.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.privacy-promise {
  display: flex; gap: 10px; align-items: flex-start;
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--primary-soft);
  border-radius: var(--r-sm);
  font-size: 12px;
  color: var(--ink-2);
  line-height: 1.6;
}
.privacy-promise strong { color: var(--ink); font-weight: 600; }
.privacy-icon { font-size: 14px; flex-shrink: 0; margin-top: 1px; }

.preview-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 8px;
  margin-top: 12px;
}
.preview-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--paper-3);
  border: 1px solid var(--line);
}
.preview-item img,
.preview-item video {
  width: 100%; height: 100%;
  object-fit: cover;
}
.preview-item.video::after {
  content: "▶";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 28px; height: 28px;
  background: rgba(0,0,0,0.55);
  color: white;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 10px;
  backdrop-filter: blur(8px);
}
.preview-meta {
  position: absolute;
  bottom: 4px; left: 4px;
  background: rgba(0,0,0,0.6);
  color: white;
  font-size: 9.5px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
  letter-spacing: 0.02em;
  font-family: var(--font-mono);
}
.preview-item .remove {
  position: absolute;
  top: 4px; right: 4px;
  width: 20px; height: 20px;
  background: rgba(0,0,0,0.6);
  color: white;
  border-radius: 50%;
  font-size: 12px;
  display: grid; place-items: center;
  backdrop-filter: blur(8px);
  transition: background 0.15s;
}
.preview-item .remove:hover { background: var(--emergency); }

/* 提交行 */
.submit-row {
  display: flex; align-items: center; gap: 10px;
  margin-top: 8px;
}
.btn-primary {
  padding: 12px 24px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: all 0.15s var(--ease-out);
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary:hover { background: var(--ink-2); transform: translateY(-1px); }
[data-theme="dark"] .btn-primary {
  background: var(--primary); color: var(--paper);
}
[data-theme="dark"] .btn-primary:hover {
  background: color-mix(in srgb, var(--primary) 88%, white);
}
.btn-secondary {
  padding: 12px 20px;
  background: var(--paper-3);
  color: var(--ink-2);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
}
.btn-secondary:hover { background: var(--line); color: var(--ink); }

.btn-ghost {
  padding: 5px 10px;
  background: transparent;
  color: var(--ink-3);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.15s;
}
.btn-ghost:hover { background: var(--paper-3); color: var(--ink); }

.status-text { font-size: 12px; color: var(--ink-4); }

/* ============================================
   13) 消息流 / 气泡
   ============================================ */
.message-stream {
  display: flex; flex-direction: column; gap: 24px;
  padding: 8px 0;
}

.message {
  display: flex; gap: 12px;
  animation: msg-in 0.35s var(--ease-out);
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.message.user { flex-direction: row-reverse; }

.message-avatar {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 12px;
  font-weight: 600;
  background: var(--paper-3);
  color: var(--ink-3);
  letter-spacing: -0.02em;
}
.message.user .message-avatar { background: var(--ink); color: var(--paper); }
[data-theme="dark"] .message.user .message-avatar { background: var(--primary); }
.message.ai .message-avatar { background: var(--primary-soft); color: var(--primary); }

.message-body { flex: 1; min-width: 0; max-width: calc(100% - 44px); }
.message.user .message-body { display: flex; flex-direction: column; align-items: flex-end; }

.message-meta {
  font-size: 11px;
  color: var(--ink-4);
  margin-bottom: 6px;
  font-weight: 500;
  letter-spacing: 0;
  font-family: var(--font-mono);
}
.message.user .message-meta { font-family: var(--font-sans); }

.message-bubble {
  display: inline-block;
  max-width: 100%;
  padding: 14px 18px;
  background: var(--ai-bubble);
  color: var(--ai-bubble-text);
  border: 1px solid var(--line);
  border-radius: var(--r);
  border-top-left-radius: 4px;
  font-size: 14.5px;
  line-height: 1.7;
  word-wrap: break-word;
}
.message.user .message-bubble {
  background: var(--user-bubble);
  color: var(--user-bubble-text);
  border-color: var(--user-bubble);
  border-radius: var(--r);
  border-top-right-radius: 4px;
}
.message.ai.is-complete .message-bubble {
  border-color: color-mix(in srgb, var(--success) 30%, var(--line));
}

.message-bubble .attachments {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 10px;
}
.message-bubble .attachment-thumb {
  width: 80px; height: 80px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.message.user .message-bubble .attachment-thumb {
  border-color: rgba(255,255,255,0.2);
}

.message-actions {
  display: flex; gap: 2px;
  margin-top: 8px;
  opacity: 0;
  transition: opacity 0.2s;
}
.message.ai:hover .message-actions,
.message.ai.is-complete .message-actions { opacity: 1; }

/* 思考中 dots */
.thinking-dots {
  display: inline-flex; gap: 3px; align-items: center;
  margin-left: 4px;
}
.thinking-dots span {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--ink-4);
  animation: thinking 1.2s infinite var(--ease) both;
}
.thinking-dots span:nth-child(2) { animation-delay: 0.15s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes thinking {
  0%, 80%, 100% { opacity: 0.3; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-2px); }
}

.typing-cursor {
  display: inline-block;
  width: 6px; height: 14px;
  background: var(--primary);
  margin-left: 1px;
  vertical-align: -2px;
  animation: blink 1s infinite step-end;
  border-radius: 1px;
}
@keyframes blink { 50% { opacity: 0; } }

.complete-badge {
  display: inline-block;
  background: color-mix(in srgb, var(--success) 15%, transparent);
  color: var(--success);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  margin-left: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-mono);
}

/* 处理摘要 note */
.processing-note {
  color: var(--primary);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.01em;
  font-family: var(--font-mono);
}

/* ============================================
   14) AI 追问 chip
   ============================================ */
.ask-panel {
  margin-top: 12px;
  display: flex; flex-direction: column;
  gap: 8px;
}
.ask-item {
  background: var(--paper-3);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  border-left: 2px solid var(--primary);
  transition: opacity 0.2s;
}
.ask-item.answered { opacity: 0.5; border-left-color: var(--ink-4); }
.ask-q {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: -0.005em;
}
.ask-options { display: flex; flex-wrap: wrap; gap: 6px; }
.ask-chip {
  padding: 6px 12px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--ink-2);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.ask-chip:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  transform: translateY(-1px);
}
[data-theme="dark"] .ask-chip:hover {
  background: var(--primary);
  color: var(--paper);
  border-color: var(--primary);
}
.ask-free {
  font-size: 11.5px;
  color: var(--ink-4);
  font-style: italic;
}

/* ============================================
   15) 追问栏 (固定底部)
   ============================================ */
.followup-bar {
  position: sticky;
  bottom: 0;
  margin-top: 20px;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--paper-2) 92%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  display: flex; gap: 10px; align-items: flex-end;
  box-shadow: var(--shadow-lg);
}
.followup-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--paper-3);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 14px;
  color: var(--ink);
  resize: none;
  max-height: 160px;
  line-height: 1.5;
  font-family: var(--font-sans);
  transition: all 0.15s;
}
.followup-input::placeholder { color: var(--ink-4); }
.followup-input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--paper-2);
}
.followup-send {
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s var(--ease-out);
  white-space: nowrap;
}
.followup-send:hover { background: var(--ink-2); transform: translateY(-1px); }
[data-theme="dark"] .followup-send {
  background: var(--primary); color: var(--paper);
}

/* ============================================
   16) 音轨转写 / 翻译块
   ============================================ */
.audio-transcripts {
  display: flex; flex-direction: column; gap: 6px;
  margin-top: 10px;
}
.audio-transcripts:empty { display: none; }
.audio-transcript {
  background: color-mix(in srgb, var(--primary) 6%, transparent);
  border-left: 2px solid var(--primary);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: 8px 12px;
  font-size: 12.5px;
  line-height: 1.6;
}
.message.user .audio-transcript {
  background: rgba(255,255,255,0.1);
  border-left-color: rgba(255,255,255,0.5);
  color: rgba(255,255,255,0.95);
}
.audio-transcript-head {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 3px;
  letter-spacing: 0.02em;
  font-family: var(--font-mono);
}
.message.user .audio-transcript-head { color: rgba(255,255,255,0.85); }
.audio-transcript-body {
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--ink-2);
}
.message.user .audio-transcript-body { color: rgba(255,255,255,0.95); }

.translated-block {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--paper-3);
  border-left: 2px solid var(--info);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.translated-label {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--info);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.translated-content { font-size: 14px; line-height: 1.65; color: var(--ink-2); }

/* ============================================
   17) Markdown 渲染 (.md)
   ============================================ */
.md { color: inherit; }
.md > *:first-child { margin-top: 0; }
.md > *:last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3, .md h4 {
  font-family: var(--font-display);
  margin: 18px 0 8px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.md h1 { font-size: 22px; }
.md h2 { font-size: 17px; }
.md h3 { font-size: 15px; }
.md h4 { font-size: 14px; color: var(--ink-2); }
.md p { margin: 10px 0; }
.md ul, .md ol { margin: 10px 0; padding-left: 22px; }
.md li { margin: 4px 0; }
.md li::marker { color: var(--ink-4); }
.md strong { color: var(--ink); font-weight: 600; }
.md em { color: var(--ink-2); }
.md code {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 1px 6px;
  background: var(--paper-3);
  border-radius: 4px;
  color: var(--primary);
  letter-spacing: -0.02em;
}
.md pre {
  margin: 12px 0;
  padding: 14px 16px;
  background: var(--paper-3);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.5;
}
.md pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}
.md blockquote {
  margin: 12px 0;
  padding: 10px 14px;
  background: var(--paper-3);
  border-left: 2px solid var(--ink-5);
  color: var(--ink-3);
  font-size: 13px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.md hr {
  margin: 18px 0;
  border: none;
  border-top: 1px solid var(--line);
}
.md table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13px;
}
.md th, .md td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.md th {
  font-weight: 600;
  color: var(--ink);
  background: var(--paper-3);
}
.md a { color: var(--primary); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }

/* 红旗高亮 */
.red-flag-notice {
  margin: 12px 0;
  padding: 14px 16px;
  background: var(--emergency-soft);
  border-left: 3px solid var(--emergency);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  display: flex; gap: 10px;
  font-weight: 500;
}
[data-theme="dark"] .red-flag-notice {
  background: color-mix(in srgb, var(--emergency) 12%, transparent);
}
.red-flag-notice-icon { font-size: 16px; flex-shrink: 0; }

/* ============================================
   18) Toast
   ============================================ */
.toast-container {
  position: fixed;
  top: 80px; right: 28px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  min-width: 240px; max-width: 360px;
  padding: 12px 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.3s var(--ease-out);
}
.toast.info { border-left: 3px solid var(--info); }
.toast.success { border-left: 3px solid var(--success); }
.toast.warn { border-left: 3px solid var(--warning); }
.toast.error { border-left: 3px solid var(--emergency); }
.toast-title { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 2px; }
.toast-msg { font-size: 12.5px; color: var(--ink-2); line-height: 1.55; }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ============================================
   19) 历史 / 关于 / 药物 页面
   ============================================ */
.history-page, .about-page, .medication-page { padding-top: 40px; padding-bottom: 60px; }

.history-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--ink-4);
}

.history-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 18px 22px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
}
.history-card:hover {
  border-color: var(--dept-color, var(--primary));
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.history-card-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px;
}
.history-dept-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px;
  color: white;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.history-time {
  font-size: 11px;
  color: var(--ink-4);
  font-family: var(--font-mono);
}
.history-snippet {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.55;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.history-snippet strong { color: var(--ink-3); margin-right: 4px; font-weight: 500; }
.history-actions {
  display: flex; gap: 4px;
  margin-top: 10px;
}

/* 关于卡片 */
.about-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 24px 28px;
  margin-bottom: 14px;
}
.about-card h2 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.about-card ul { padding-left: 22px; }
.about-card li { margin: 6px 0; color: var(--ink-2); font-size: 13.5px; }
.about-card p { color: var(--ink-2); font-size: 13.5px; margin: 8px 0; }
.about-card code {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 1px 6px;
  background: var(--paper-3);
  border-radius: 4px;
  color: var(--primary);
}
.about-disclaimer { background: var(--paper-3); }

/* 药物建议 */
.drug-suggestions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.drug-suggestion {
  padding: 5px 11px;
  background: var(--paper-3);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s;
}
.drug-suggestion:hover { background: var(--ink); color: var(--paper); }
.result-disclaimer { font-size: 12px; color: var(--ink-3); }

/* ============================================
   20) Loading / 全局拖入
   ============================================ */
.loading-page {
  min-height: 60vh;
  display: grid; place-items: center;
}
.spinner {
  width: 24px; height: 24px;
  border: 2px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.global-drop-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--ink) 50%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: grid; place-items: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.global-drop-overlay.show { opacity: 1; pointer-events: auto; }
.global-drop-card {
  background: var(--paper-2);
  border: 1.5px dashed var(--primary);
  border-radius: var(--r-lg);
  padding: 40px 56px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.global-drop-icon {
  font-size: 40px; margin-bottom: 14px;
  animation: drop-bounce 0.8s ease-in-out infinite alternate;
}
@keyframes drop-bounce { to { transform: translateY(-6px); } }
.global-drop-title { font-size: 15px; font-weight: 600; color: var(--ink); margin-bottom: 4px; }
.global-drop-hint { font-size: 12.5px; color: var(--ink-4); }

/* ============================================
   21) 页脚
   ============================================ */
.footer {
  margin-top: 80px;
  padding: 32px 28px 40px;
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  text-align: center;
}
.footer p {
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.7;
  max-width: 720px;
  margin: 0 auto;
}
.footer p strong { color: var(--ink-2); font-weight: 600; }
.footer p strong.emergency { color: var(--emergency); }
.footer-meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0;
}

/* ============================================
   22) highlight.js dark/light 切换
   ============================================ */
[data-theme="dark"] #hljs-light { display: none; }
[data-theme="light"] #hljs-dark { display: none; }
[data-theme="dark"] #hljs-dark { display: block; }

/* ============================================
   23) 响应式
   ============================================ */
@media (max-width: 900px) {
  .container { padding: 32px 18px; }
  .hero { padding: 40px 16px 28px; }
  .topbar-inner { padding: 12px 18px; gap: 12px; }
  .nav { margin-left: 0; gap: 0; overflow-x: auto; }
  .nav a { padding: 6px 10px; font-size: 12px; }
  .brand-sub { display: none; }
  .lang-switcher { display: none; }
  .triage-box, .form-card { padding: 20px; }
  .emergency-fab { bottom: 20px; right: 20px; padding: 10px 14px; font-size: 12px; }
  .toast-container { top: 70px; right: 12px; left: 12px; }
  .toast { max-width: none; }
}
@media (max-width: 600px) {
  .dept-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
  .dept-card { padding: 16px; }
  .triage-input-row { flex-direction: column; }
  .message-bubble { font-size: 14px; padding: 12px 14px; }
  .followup-bar { padding: 10px 12px; }
  .audio-transcript { font-size: 12px; padding: 7px 10px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}