:root {
  --bg: #0c0a1a;
  --bg-2: #141029;
  --card: rgba(255, 255, 255, 0.045);
  --card-border: rgba(255, 255, 255, 0.09);
  --text: #ecebf5;
  --muted: #9b99b8;
  --accent-1: #a855f7;
  --accent-2: #ec4899;
  --accent-3: #6366f1;
  --radius: 18px;
  --radius-sm: 12px;
}

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

html, body {
  min-height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景光球 */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: radial-gradient(ellipse at top, var(--bg-2), var(--bg) 60%);
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 18s ease-in-out infinite;
}
.orb-1 {
  width: 480px; height: 480px;
  background: var(--accent-1);
  top: -120px; left: -80px;
}
.orb-2 {
  width: 420px; height: 420px;
  background: var(--accent-2);
  top: 30%; right: -120px;
  animation-delay: -6s;
}
.orb-3 {
  width: 380px; height: 380px;
  background: var(--accent-3);
  bottom: -120px; left: 30%;
  animation-delay: -12s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -40px) scale(1.08); }
}

/* 布局 */
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}

.hero {
  text-align: center;
  margin-bottom: 36px;
}
.badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.5px;
  color: var(--muted);
  padding: 5px 14px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.1;
}
.grad {
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2) 60%, var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.subtitle {
  color: var(--muted);
  margin-top: 12px;
  font-size: 15px;
}

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.form-card {
  padding: 24px;
}

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  padding: 14px 16px;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 96px;
}
textarea::placeholder {
  color: #6c6a85;
}
textarea:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.18);
}

/* 灵感 chips */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 14px 0 18px;
}
.chip-label {
  font-size: 12px;
  color: var(--muted);
  margin-right: 2px;
}
.chip {
  font-size: 13px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.18s;
  font-family: inherit;
}
.chip:hover {
  border-color: var(--accent-1);
  background: rgba(168, 85, 247, 0.15);
  transform: translateY(-1px);
}

/* 选项行 */
.options {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}
.opt {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.opt > label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}
.opt select {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  padding: 9px 14px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239b99b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'></polyline></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 34px;
}
.opt select:focus {
  outline: none;
  border-color: var(--accent-1);
}
.opt-toggle {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}
.opt-toggle > label {
  margin-top: 0;
}
.switch {
  width: 42px;
  height: 24px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--card-border);
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
  padding: 0;
}
.switch .knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
}
.switch[aria-checked="true"] {
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
}
.switch[aria-checked="true"] .knob {
  transform: translateX(18px);
}

/* 生成按钮 */
.actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  position: relative;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  padding: 13px 30px;
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 8px 24px -8px rgba(236, 72, 153, 0.6);
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(236, 72, 153, 0.75);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-primary:disabled {
  cursor: not-allowed;
  opacity: 0.7;
  transform: none;
}
.btn-spinner {
  display: none;
  width: 16px;
  height: 16px;
  margin-left: 8px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
}
.btn-primary.loading .btn-label {
  opacity: 0.85;
}
.btn-primary.loading .btn-spinner {
  display: inline-block;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.hint {
  font-size: 12px;
  color: var(--muted);
}

/* 结果卡 */
.result-card {
  margin-top: 20px;
  min-height: 200px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.result-empty {
  text-align: center;
  color: var(--muted);
}
.empty-icon {
  font-size: 40px;
  margin-bottom: 8px;
  opacity: 0.5;
}

.result-loading {
  text-align: center;
  color: var(--muted);
}
.result-loading .lg-spinner {
  width: 38px;
  height: 38px;
  margin: 0 auto 14px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.result-error {
  text-align: center;
  color: #ffb4c8;
  max-width: 560px;
}
.result-error .err-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.result-image {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.result-image img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.7);
  animation: fadeIn 0.5s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}
.result-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.meta-text {
  font-size: 12px;
  color: var(--muted);
}
.btn-ghost {
  font-family: inherit;
  font-size: 13px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  cursor: pointer;
  transition: all 0.18s;
  text-decoration: none;
  display: inline-block;
}
.btn-ghost:hover {
  border-color: var(--accent-1);
  background: rgba(168, 85, 247, 0.15);
}
/* 微信长按保存提示 */
.save-hint {
  font-size: 13px;
  color: var(--text);
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid var(--accent-1);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  display: inline-block;
}

/* 页脚 */
.footer {
  text-align: center;
  margin-top: 28px;
  font-size: 12px;
  color: var(--muted);
}
.footer a {
  color: var(--muted);
  text-decoration: none;
}
.footer a:hover {
  color: var(--text);
}
.dot {
  margin: 0 6px;
}

/* 移动端 */
@media (max-width: 560px) {
  .container { padding: 36px 16px 60px; }
  .form-card { padding: 18px; }
  .options { gap: 10px; }
  .btn-primary { width: 100%; }
}