:root {
  --paper: #F2EDDD;
  --paper-2: #E8E1CD;
  --paper-3: #DDD3B9;
  --paper-shadow: #C4B898;
  --ink: #2B3540;
  --ink-2: #4A5662;
  --ink-3: #6F7984;
  --ink-mute: #9CA3AC;
  --lotus: #B85E54;
  --lotus-deep: #9B4940;
  --lotus-soft: #D69088;
  --sandal: #7C5A3F;
  --sandal-2: #5E4530;
  --teal: #4A6670;
  --gold: #A88654;
  --gold-light: #B85E54;
  --gold-dark: #7C5A3F;
  --bg: var(--paper);
  --bg2: var(--paper-2);
  --bg3: rgba(255,255,255,0.38);
  --border: var(--paper-shadow);
  --text: var(--ink);
  --text-soft: var(--ink-2);
  --text-mute: var(--ink-3);
  --user-bubble: #E7D8C0;
  --assistant-bubble: rgba(255,255,255,0.42);
  --danger: #C75B5B;
  --font-main: 'Kaiti SC', 'STKaiti', 'KaiTi', 'PingFang SC', 'Microsoft YaHei', serif;
  --font-serif: var(--font-main);
  --font-sans: var(--font-main);
  --font-kai: var(--font-main);
}

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

[hidden] { display: none !important; }

button,
input,
textarea {
  font-family: var(--font-main);
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--bg);
  background-image:
    linear-gradient(90deg, rgba(242,237,221,0.74), rgba(242,237,221,0.48) 44%, rgba(242,237,221,0.28)),
    url("/img/buddha-lotus-bg.png"),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.17 0 0 0 0 0.18 0 0 0 0 0.2 0 0 0 0.04 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-position: center, center, center;
  background-repeat: no-repeat, no-repeat, repeat;
  background-size: cover, cover, 200px 200px;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

/* ============ 合规横幅 ============ */
.compliance-banner {
  flex-shrink: 0;
  background: linear-gradient(to right, rgba(124,90,63,0.08), rgba(124,90,63,0.04));
  border-bottom: 1px solid rgba(124,90,63,0.20);
  color: var(--sandal-2);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.5px;
  padding: 8px 16px;
  text-align: center;
  line-height: 1.5;
}

/* ============ 欢迎页 ============ */
.welcome {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  position: relative;
  background: linear-gradient(180deg, rgba(242,237,221,0.06), rgba(242,237,221,0.28));
  overflow-y: auto;
}
.welcome::after {
  content: none;
}
.welcome-inner {
  max-width: 580px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.welcome-eyebrow {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 8px;
  color: var(--sandal);
  margin-bottom: 32px;
  text-transform: uppercase;
}
.welcome-title {
  font-family: var(--font-kai);
  font-size: clamp(48px, 9vw, 76px);
  font-weight: 400;
  letter-spacing: 14px;
  margin-bottom: 24px;
  text-indent: 14px;
}
.welcome-title span { color: var(--lotus); font-weight: 500; }
.welcome-line {
  width: 100px;
  height: 14px;
  margin: 0 auto 32px;
  background:
    linear-gradient(to right, transparent 0%, var(--sandal) 25%, var(--sandal) 40%, transparent 40%, transparent 60%, var(--sandal) 60%, var(--sandal) 75%, transparent 100%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'><g fill='none' stroke='%237C5A3F' stroke-width='1.1' stroke-linecap='round'><g transform='translate(10,10)'><ellipse cx='0' cy='-4' rx='1.5' ry='3.5'/><ellipse cx='0' cy='-4' rx='1.5' ry='3.5' transform='rotate(60)'/><ellipse cx='0' cy='-4' rx='1.5' ry='3.5' transform='rotate(120)'/><ellipse cx='0' cy='-4' rx='1.5' ry='3.5' transform='rotate(180)'/><ellipse cx='0' cy='-4' rx='1.5' ry='3.5' transform='rotate(240)'/><ellipse cx='0' cy='-4' rx='1.5' ry='3.5' transform='rotate(300)'/></g></g></svg>") center / 16px 16px no-repeat;
  opacity: 0.6;
}
.welcome-sub {
  color: var(--ink-3);
  font-family: var(--font-sans);
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 52px;
}
.welcome-quote {
  background: rgba(232,225,205,0.84);
  border-left: 2px solid var(--lotus);
  padding: 28px 32px 32px;
  margin-bottom: 48px;
  text-align: left;
  position: relative;
}
.welcome-quote::before {
  content: '"';
  position: absolute;
  top: 0;
  left: 14px;
  font-family: var(--font-serif);
  font-size: 60px;
  color: var(--lotus);
  opacity: 0.20;
  line-height: 1;
}
.welcome-quote p {
  font-family: var(--font-kai);
  color: var(--text);
  font-size: 18px;
  line-height: 2.05;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.welcome-quote span {
  color: var(--sandal);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 3px;
}
.start-btn {
  background: var(--sandal);
  color: var(--paper);
  border: none;
  padding: 14px 56px;
  font-family: var(--font-kai);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 1px;
  text-indent: 10px;
}
.start-btn:hover { background: var(--sandal-2); transform: translateY(-1px); }
.welcome-foot {
  margin-top: 40px;
  color: var(--text-mute);
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.7;
}

/* ============ 聊天页 ============ */
.chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.chat-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(232,225,205,0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--sandal); color: var(--paper);
  font-family: var(--font-kai);
  font-weight: 600; font-size: 18px;
  border-radius: 4px;
}
.brand-name {
  font-family: var(--font-kai);
  font-size: 17px;
  letter-spacing: 4px;
  color: var(--text);
}
.reset-btn {
  background: transparent;
  color: var(--text-soft);
  border: 1px solid var(--border);
  padding: 6px 14px;
  font-size: 12px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}
.reset-btn:hover { color: var(--gold); border-color: var(--gold); }

/* 消息区 */
.chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px 16px 12px;
  scroll-behavior: smooth;
}
.message {
  display: flex;
  margin-bottom: 16px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}
.message-user { justify-content: flex-end; }
.message-assistant { justify-content: flex-start; }
.bubble {
  max-width: 78%;
  padding: 14px 18px;
  border-radius: 3px;
  font-size: 15px;
  line-height: 1.85;
  word-wrap: break-word;
  white-space: pre-wrap;
}
.message-user .bubble {
  background: var(--user-bubble);
  border: 1px solid rgba(124,90,63,0.18);
  color: var(--text);
}
.message-assistant .bubble {
  background: rgba(255,255,255,0.58);
  border: 1px solid var(--border);
  color: var(--text);
}
.bubble p { margin-bottom: 8px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble .ai-tag {
  display: block;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed rgba(124,90,63,0.25);
  color: var(--text-mute);
  font-size: 11px;
  letter-spacing: 1px;
}
.bubble .typing-cursor {
  display: inline-block;
  width: 6px; height: 14px;
  background: var(--lotus);
  animation: blink 1s infinite;
  vertical-align: text-bottom;
  margin-left: 2px;
}
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* 快捷问题 */
.quick-questions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1340px;
  margin: 0 auto 22px;
  width: 100%;
}
.quick-group {
  min-width: 0;
  padding: 20px 18px 18px;
  background: rgba(242,237,221,0.76);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.quick-label {
  color: var(--sandal);
  font-size: 20px;
  font-family: var(--font-kai);
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.quick-btn {
  background: rgba(255,252,241,0.62);
  color: var(--text-soft);
  border: 1px solid var(--border);
  display: block;
  width: 100%;
  padding: 14px 18px;
  margin-top: 12px;
  font-size: 20px;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
  text-align: left;
  white-space: normal;
  line-height: 1.45;
}
.quick-btn:hover {
  background: var(--paper-2);
  border-color: var(--lotus);
  color: var(--lotus-deep);
}
.quick-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 输入区 */
.chat-input {
  flex-shrink: 0;
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 14px 16px 18px;
  background: rgba(232,225,205,0.84);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}
.chat-input textarea {
  flex: 1;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.6;
  resize: none;
  outline: none;
  max-height: 160px;
  transition: border-color 0.2s;
}
.chat-input textarea:focus { border-color: var(--gold); }
.chat-input textarea:focus { box-shadow: 0 0 0 2px rgba(184,94,84,0.10); }
.chat-input textarea::placeholder { color: var(--text-mute); }
.send-btn {
  background: var(--sandal);
  color: var(--paper);
  border: none;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.2s;
  flex-shrink: 0;
}
.send-btn:hover { background: var(--sandal-2); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 滚动条 */
.chat-body::-webkit-scrollbar { width: 6px; }
.chat-body::-webkit-scrollbar-track { background: transparent; }
.chat-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.chat-body::-webkit-scrollbar-thumb:hover { background: var(--gold-dark); }

/* 错误提示 */
.error-toast {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--danger);
  color: white;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 13px;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* 移动端适配 */
@media (max-width: 600px) {
  .compliance-banner { font-size: 11px; padding: 6px 12px; }
  .welcome-title { letter-spacing: 6px; }
  .bubble { max-width: 88%; font-size: 14px; }
  .chat-input { padding: 10px 12px 14px; gap: 8px; }
  .send-btn { width: 40px; height: 40px; }
  .quick-questions {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .quick-group { padding: 14px; }
  .quick-label { font-size: 17px; }
  .quick-btn { font-size: 15px; padding: 10px 12px; }
}