:root {
  --color-bg: #f5f0e8;
  --color-paper: #fdfaf3;
  --color-text: #2c2416;
  --color-text-light: #5c4d3c;
  --color-border: #d4c5b2;
  --color-accent: #8b3a3a;
  --color-accent2: #c4823e;
  --color-gold: #b8860b;
  --color-dark: #3a2f1f;
  --color-card-bg: #fefcf9;
  --color-input-bg: #fefcf7;
  --shadow-sm: 0 1px 4px rgba(44, 36, 22, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 36, 22, 0.1);
  --shadow-lg: 0 8px 32px rgba(44, 36, 22, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: "Noto Serif SC", "Songti SC", serif;
  background: #e8e0d5;
  background-image:
    radial-gradient(ellipse at 20% 10%, rgba(180, 160, 130, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 90%, rgba(160, 120, 80, 0.08) 0%, transparent 60%);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  overflow-x: hidden;
}

.top-ornament {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #8b3a3a, #c4823e, #b8860b, #c4823e, #8b3a3a);
  z-index: 1000;
}

.container {
  width: 100%;
  max-width: 600px;
  margin: 20px auto;
  background: var(--color-bg);
  box-shadow: var(--shadow-lg);
  border-radius: 12px;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0 16px 20px;
  border: 1px solid var(--color-border);
}

header {
  text-align: center;
  padding: 24px 0 12px;
  position: relative;
}

.logo-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 6px;
  filter: drop-shadow(0 4px 4px rgba(0,0,0,0.1));
}

header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--color-dark);
  margin: 0;
}

.subtitle {
  font-size: 12px;
  color: var(--color-accent2);
  letter-spacing: 3px;
  margin-top: 4px;
}

/* ===== 用户信息区域 ===== */
#user-area {
  position: absolute;
  right: 10px;
  top: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.user-buttons {
  display: flex;
  gap: 6px;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  letter-spacing: 1px;
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #fff;
}

/* ===== 导航菜单 ===== */
nav {
  display: flex;
  justify-content: space-around;
  gap: 2px;
  margin: 20px 0 16px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 30px;
  padding: 4px;
  box-shadow: var(--shadow-sm);
}

.tab-btn {
  flex: 1;
  padding: 10px 0;
  border-radius: 26px;
  background: transparent;
  color: var(--color-text-light);
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 2px;
  transition: all var(--transition);
  font-family: inherit;
  text-align: center;
  position: relative;
}

.tab-btn:hover {
  color: var(--color-accent);
  background: rgba(139, 58, 58, 0.05);
}

.tab-btn.active {
  background: var(--color-dark);
  color: #f0e6d2;
  box-shadow: 0 2px 8px rgba(44, 36, 22, 0.2);
  transform: scale(1.02);
}

/* ===== 卡片 ===== */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 12px 0;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card h3 {
  text-align: center;
  font-size: 18px;
  letter-spacing: 3px;
  color: var(--color-dark);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--color-border);
}

/* 表单 */
.form-group { margin-bottom: 16px; }
label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: #4a3a28;
  font-size: 14px;
  letter-spacing: 1px;
}
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-input-bg);
  font-family: inherit;
  font-size: 14px;
  color: var(--color-text);
  transition: all var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-accent2);
  box-shadow: 0 0 0 3px rgba(196, 130, 62, 0.1);
}
.btn-primary {
  background: var(--color-dark);
  color: #f0e6d2;
  border: none;
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 2px;
  cursor: pointer;
  width: 100%;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(44, 36, 22, 0.15);
  font-family: inherit;
}
.btn-primary:hover {
  background: #4a3d2a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(44, 36, 22, 0.25);
}
.result {
  background: #fdfaf5;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent2);
  padding: 14px;
  margin-top: 16px;
  border-radius: var(--radius-sm);
  display: none;
  white-space: pre-wrap;
  line-height: 1.8;
  font-size: 14px;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.4s ease;
}
.result.show { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.prompt-text {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: #8b6b4a;
  font-style: italic;
}
.input-hint {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: #b0a090;
}

/* 底部 */
footer {
  text-align: center;
  margin-top: auto;
  padding: 16px 0 8px;
}
.footer-line {
  width: 60px;
  height: 2px;
  background: var(--color-accent2);
  margin: 0 auto 10px;
  opacity: 0.5;
}
footer p {
  font-size: 11px;
  color: #b0a090;
  letter-spacing: 2px;
}

.bg-decor {
  position: fixed;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(196,130,62,0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* 模态框 */
.modal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}
.modal.hidden { display: none !important; }
.modal-content {
  background: var(--color-card-bg);
  padding: 30px;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  position: relative;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  cursor: pointer;
  color: #8b6b4a;
  line-height: 1;
}
.modal-close:hover { color: #c41e3a; }
.modal-content h2 {
  text-align: center;
  letter-spacing: 4px;
  margin-bottom: 24px;
}

@media (max-width: 480px) {
  .container { margin: 0; border-radius: 0; padding: 0 12px 16px; }
  .tab-btn { font-size: 14px; letter-spacing: 1px; }
  .logo-icon { font-size: 40px; }
  header h1 { font-size: 24px; }
}