/* === 老天奶有话说 — 主样式 === */

:root {
  --bg-rice: #F4F1E8;
  --primary-mist: #6E8B74;
  --dark-ink: #2F3E34;
  --accent-gold: #B79D74;
  --text-primary: #2F3E34;
  --text-secondary: #6E8B74;
  --text-muted: #9CA89E;
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", "STSong", serif;
  --radius: 12px;
  --transition-slow: 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-med: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.3s ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-rice);
  color: var(--text-primary);
  min-height: 100vh; min-height: 100dvh;
  overflow-x: hidden;
  line-height: 1.8;
}

.account-bar {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  right: 18px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
}
.usage-pill,
.account-button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(183,157,116,0.22);
  border-radius: 18px;
  background: rgba(255,254,249,0.78);
  color: var(--text-secondary);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  backdrop-filter: blur(10px);
}
.account-button { color: var(--accent-gold); cursor: pointer; }

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 100vh; min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* === 静音按钮 === */
.mute-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(183,157,116,0.2);
  border-radius: 50%;
  background: rgba(244,241,232,0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, border-color 0.3s ease;
  opacity: 0.5;
}
.mute-toggle:hover { opacity: 1; border-color: var(--accent-gold); }
.mute-toggle.muted { opacity: 0.35; }

/* === 通用 === */
.step { width: 100%; }
.step-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  padding: 40px 0;
}
.serif { font-family: var(--font-serif); }
.subtitle { font-size: 0.95rem; color: var(--accent-gold); letter-spacing: 0.2em; }
.title {
  font-size: 1.6rem; color: var(--dark-ink); text-align: center;
  line-height: 1.7; font-weight: 400;
}

.btn-back {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
  left: max(20px, calc(50% - 312px));
  z-index: 35;
  border: 1px solid rgba(183,157,116,0.2);
  border-radius: 18px;
  background: rgba(255,254,249,0.7);
  backdrop-filter: blur(10px);
  color: var(--accent-gold);
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  opacity: 0.72;
  padding: 5px 12px;
  transition: color var(--transition-fast), opacity var(--transition-fast), background var(--transition-fast);
}
.btn-back::before { content: "←"; font-size: 0.9rem; margin-right: 7px; }
.btn-back:hover { color: var(--dark-ink); opacity: 1; background: #fffef9; }

.topic-selector {
  width: 100%;
  border: 0;
  position: relative;
  padding: 18px 0 4px;
  border-top: 1px solid rgba(183,157,116,0.24);
}
.topic-label {
  color: var(--accent-gold);
  font-family: var(--font-serif);
  font-size: 0.86rem;
  letter-spacing: 0.18em;
  margin-bottom: 15px;
}
.topic-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.topic-option {
  height: 46px;
  border: 1px solid rgba(183,157,116,0.22);
  border-radius: 2px;
  background: rgba(244,241,232,0.32);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  padding: 0 6px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}
.topic-option:hover { border-color: rgba(183,157,116,0.58); }
.topic-option.selected {
  background: rgba(183,157,116,0.08);
  border-color: var(--accent-gold);
  color: var(--dark-ink);
}
.topic-option.selected::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  top: 5px;
  right: 5px;
  border-radius: 50%;
  background: #A65D51;
  box-shadow: 0 0 0 2px rgba(166,93,81,0.1);
}

/* === Step 1: 悬浮宣纸卡片 === */
.step-1-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.wish-card {
  position: relative;
  width: 100%;
  background: rgba(244,241,232,0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 20px;
  border: 1px solid rgba(183,157,116,0.2);
  padding: 28px 24px 16px;
  box-shadow:
    0 2px 24px rgba(47,62,52,0.04),
    inset 0 1px 0 rgba(255,255,255,0.5);
  transition: box-shadow 0.8s ease, border-color 0.8s ease;
}

.wish-card:focus-within {
  border-color: rgba(110,139,116,0.35);
  box-shadow:
    0 4px 32px rgba(110,139,116,0.08),
    0 0 0 4px rgba(110,139,116,0.03),
    inset 0 1px 0 rgba(255,255,255,0.5);
}

.wish-card-glow {
  position: absolute;
  inset: -1px;
  border-radius: 20px;
  background: radial-gradient(ellipse at 50% 100%, rgba(110,139,116,0.06) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 1s ease;
}
.wish-card:focus-within .wish-card-glow { opacity: 1; }

.wish-textarea {
  width: 100%;
  background: transparent;
  border: none;
  padding: 4px 0;
  font-size: 1.1rem;
  font-family: var(--font-serif);
  color: var(--dark-ink);
  line-height: 2;
  resize: none;
  outline: none;
  caret-color: var(--accent-gold);
  animation: cursorSlow 1.6s ease-in-out infinite;
}

.wish-textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.45;
  font-style: italic;
}

.wish-card-foot {
  display: flex;
  justify-content: flex-end;
  padding-top: 12px;
  border-top: 1px solid rgba(110,139,116,0.08);
  margin-top: 4px;
}

.char-count {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.question-guidance {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: -17px;
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-size: 0.76rem;
  line-height: 1.75;
  letter-spacing: 0.035em;
}
.question-guidance > span:first-child { color: var(--accent-gold); font-size: 0.82rem; }
.question-guidance strong { color: var(--text-secondary); font-weight: 400; }

/* === 按钮 === */
.btn-primary {
  padding: 14px 48px;
  border: none;
  border-radius: 24px;
  background-color: var(--primary-mist);
  color: var(--bg-rice);
  font-size: 1rem;
  font-family: var(--font-serif);
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.btn-primary:disabled { opacity: 0.35; cursor: not-allowed; }
.btn-primary:not(:disabled):hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(110,139,116,0.2);
}
.btn-primary:not(:disabled):active { transform: translateY(0); }

.btn-secondary {
  padding: 12px 36px;
  border: 1px solid var(--primary-mist);
  border-radius: 24px;
  background: transparent;
  color: var(--primary-mist);
  font-size: 0.95rem;
  font-family: var(--font-serif);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-secondary:hover { background-color: rgba(110,139,116,0.08); }

.btn-text {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--accent-gold);
  font-size: 0.9rem;
  cursor: pointer;
  letter-spacing: 0.1em;
}

/* === Step 2: 默问仪式 === */
.ritual-step {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.ritual-step .btn-back { position: fixed; }
.ritual-next { margin-top: 4px; }

.ritual-stage {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 雾霭背景 */
.ritual-mist {
  position: absolute;
  inset: -40px;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(110,139,116,0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 50% 80%, rgba(183,157,116,0.04) 0%, transparent 50%);
  pointer-events: none;
}

/* 八卦旋转容器 */
.bagua-orbit {
  position: absolute;
  width: 300px;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bagua-svg {
  width: 100%;
  height: 100%;
  opacity: 0.85;
}

/* 水滴 */
.water-drop {
  position: absolute;
  top: -20px;
  left: 50%;
  width: 8px;
  height: 12px;
  background: var(--accent-gold);
  border-radius: 50% 50% 50% 50% / 40% 40% 60% 60%;
  transform: translateX(-50%) scale(0);
  opacity: 0;
  filter: blur(0.5px);
  box-shadow: 0 0 8px rgba(183,157,116,0.5);
}

/* 涟漪层 */
.ripple-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ripple-dot {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(183,157,116,0.4);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
}

/* 粒子 */
.particle-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.mist-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--accent-gold);
  border-radius: 50%;
  opacity: 0;
  box-shadow: 0 0 4px rgba(183,157,116,0.4);
}

/* 仪式文字 */
.ritual-words {
  position: relative;
  z-index: 5;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 14px;
  pointer-events: none;
  user-select: none;
}

.ritual-line-1 {
  font-size: 1.35rem;
  color: var(--dark-ink);
  opacity: 0;
}

.ritual-line-2 {
  font-size: 1rem;
  color: var(--text-secondary);
  opacity: 0;
}

.ritual-line-3 {
  font-size: 0.85rem;
  color: var(--accent-gold);
  opacity: 0;
  letter-spacing: 0.15em;
}

/* === Step 3: 时间输入 === */
.worldview-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 2;
}

.time-whisper {
  font-size: 0.85rem;
  color: var(--accent-gold);
  opacity: 0;
  letter-spacing: 0.1em;
  font-family: var(--font-serif);
}

.time-input-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.time-input {
  width: 100px;
  height: 72px;
  border: none;
  border-bottom: 2px solid var(--primary-mist);
  background: transparent;
  font-size: 2.2rem;
  font-family: var(--font-serif);
  color: var(--dark-ink);
  text-align: center;
  outline: none;
  -moz-appearance: textfield;
}
.time-input::-webkit-outer-spin-button,
.time-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.time-input::placeholder { color: var(--text-muted); font-size: 1.4rem; }

.time-separator {
  font-size: 2rem;
  color: var(--accent-gold);
  font-family: var(--font-serif);
}

/* === Step 4: 卦盘 === */
.hexagram-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  width: 100%;
}

.main-hexagram { text-align: center; }

.hex-name {
  font-size: 2.4rem;
  color: var(--dark-ink);
  font-weight: 400;
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.hex-yao-lines {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin: 16px 0;
}

.hex-yao-line {
  opacity: 0;
  transition: opacity 0.6s ease;
  margin: 5px 0;
}
.hex-yao-line.yang {
  width: 64px;
  height: 4px;
  border-radius: 2px;
  background: var(--primary-mist);
}
.hex-yao-line.yin {
  display: flex;
  gap: 12px;
  justify-content: center;
}
.hex-yao-line.yin span {
  width: 24px;
  height: 4px;
  border-radius: 2px;
  background: var(--primary-mist);
}

.hex-poetic {
  max-width: 360px;
  margin: 18px auto 0;
  padding-top: 16px;
  border-top: 1px solid rgba(183,157,116,0.28);
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.85;
  font-family: var(--font-serif);
  letter-spacing: 0.06em;
}

.sub-hexagrams {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
}

.sub-hex {
  text-align: center;
  padding: 10px 4px;
  background: rgba(110,139,116,0.04);
  border-radius: var(--radius);
  border: 1px solid rgba(110,139,116,0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.sub-hex-yao {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-height: 44px;
  justify-content: center;
}

.sub-hex-yao .hex-yao-line {
  transition: opacity 0.5s ease;
  margin: 1px 0;
}

.sub-hex-yao .hex-yao-line.yang {
  width: 36px;
  height: 3px;
  border-radius: 1.5px;
  background: var(--primary-mist);
}

.sub-hex-yao .hex-yao-line.yin {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.sub-hex-yao .hex-yao-line.yin span {
  width: 14px;
  height: 3px;
  border-radius: 1.5px;
  background: var(--primary-mist);
}

.sub-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.sub-name {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-serif);
}

/* === Step 5: 解读 · 老天奶来信 === */
.reading-container {
  width: 100%;
  position: relative;
  padding: 34px 28px 30px;
  background:
    linear-gradient(135deg, rgba(183,157,116,0.035), transparent 34%),
    rgba(255,254,249,0.94);
  border: 1px solid rgba(183,157,116,0.24);
  border-radius: 4px;
  box-shadow:
    0 18px 46px rgba(47,62,52,0.09),
    0 3px 10px rgba(47,62,52,0.04),
    inset 0 1px 0 rgba(255,255,255,0.9);
}
.reading-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 44px;
  height: 2px;
  background: var(--accent-gold);
  opacity: 0.68;
  transform: translateX(-50%);
}

.reading-title {
  font-size: 1.4rem;
  color: var(--dark-ink);
  font-weight: 400;
  text-align: center;
  margin-bottom: 24px;
  letter-spacing: 0.15em;
}
.reading-topic {
  text-align: center;
  color: var(--accent-gold);
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  margin: -14px 0 20px;
}

.reading-content {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--dark-ink);
  line-height: 2;
  min-height: 120px;
  white-space: pre-wrap;
}
.reading-section + .reading-section { margin-top: 24px; }
.reading-section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 9px;
  color: var(--accent-gold);
  font-family: var(--font-serif);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 1.5;
}
.reading-section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(183,157,116,0.32), transparent);
}
.reading-section-body {
  margin: 0;
  color: var(--dark-ink);
  line-height: 2;
  letter-spacing: 0.025em;
  white-space: pre-wrap;
}

.reading-cursor {
  display: inline;
  color: var(--accent-gold);
  animation: blink 0.8s infinite;
}
.reading-cursor.hidden { display: none; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.user-feedback-letter {
  width: 100%;
  margin-top: 28px;
  padding: 24px 20px 20px;
  position: relative;
  overflow: hidden;
  background: rgba(255, 254, 249, 0.88);
  border: 1px solid rgba(183, 157, 116, 0.28);
  box-shadow: 0 12px 32px rgba(55, 66, 52, 0.07);
  text-align: left;
}
.user-feedback-letter::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  width: 42px;
  height: 2px;
  background: var(--accent-gold);
  opacity: 0.72;
}
.user-feedback-kicker { margin: 0 0 7px; color: var(--accent-gold); font-size: 0.72rem; letter-spacing: 0.22em; }
.user-feedback-letter h3 { margin: 0; color: var(--dark-ink); font-size: 1.05rem; font-weight: 500; letter-spacing: 0.08em; }
.user-feedback-intro { margin: 10px 0 16px; color: var(--text-muted); font-size: 0.78rem; line-height: 1.8; }
.user-feedback-moods { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.user-feedback-moods button {
  min-height: 39px;
  border: 1px solid rgba(110, 132, 111, 0.22);
  background: rgba(110, 132, 111, 0.045);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: 160ms ease;
}
.user-feedback-moods button:hover,
.user-feedback-moods button.selected { background: var(--primary-mist); border-color: var(--primary-mist); color: #fffef9; }
#user-feedback-text {
  width: 100%;
  margin-top: 10px;
  padding: 12px 13px;
  resize: vertical;
  border: 1px solid rgba(183, 157, 116, 0.22);
  border-radius: 0;
  outline: none;
  background: rgba(248, 246, 237, 0.55);
  color: var(--dark-ink);
  font: inherit;
  font-size: 0.78rem;
  line-height: 1.7;
}
#user-feedback-text:focus { border-color: rgba(110, 132, 111, 0.55); }
.user-feedback-foot { margin-top: 9px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
#user-feedback-count { color: var(--text-muted); font-size: 0.68rem; }
#user-feedback-submit { min-width: 102px; min-height: 38px; padding: 8px 15px; border: 0; background: var(--dark-ink); color: #fffef9; font: inherit; font-size: 0.75rem; letter-spacing: 0.08em; cursor: pointer; }
#user-feedback-submit:disabled { opacity: 0.38; cursor: default; }
.user-feedback-message { margin: 13px 0 0; color: var(--primary-deep); font-size: 0.78rem; line-height: 1.7; }
.user-feedback-letter.submitted .user-feedback-moods,
.user-feedback-letter.submitted textarea,
.user-feedback-letter.submitted .user-feedback-foot { display: none; }

.reading-feedback { width: 100%; margin-top: 18px; text-align: center; }
.feedback-button { width: 100%; min-height: 46px; padding: 10px 16px; border: 1px solid rgba(183,157,116,0.28); background: #fffef9; color: var(--text-secondary); font: inherit; font-size: 0.8rem; letter-spacing: 0.04em; cursor: pointer; }
.feedback-button-primary { background: var(--primary-mist); border-color: var(--primary-mist); color: #fffef9; }
.feedback-button:disabled { opacity: 0.65; cursor: default; }

.contact-box { width: 100%; text-align: center; margin-top: 24px; }

.contact-divider {
  width: 40px;
  height: 1px;
  background: var(--accent-gold);
  margin: 0 auto 20px;
  opacity: 0.4;
}

.contact-title {
  color: var(--dark-ink);
  font-size: 1.02rem;
  letter-spacing: 0.14em;
  margin-bottom: 6px;
}
.contact-text { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 14px; }

.community-qr-link {
  display: block;
  width: min(100%, 280px);
  aspect-ratio: 1;
  margin: 16px auto 10px;
  overflow: hidden;
  border: 1px solid rgba(183,157,116,0.2);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(47,62,52,0.08);
}

.community-qr-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 57%;
}

.community-qr-tip,
.community-qr-expiry { margin: 0; color: var(--text-muted); line-height: 1.7; }
.community-qr-tip { font-size: 0.75rem; letter-spacing: 0.03em; }
.community-qr-expiry { margin-top: 3px; font-size: 0.66rem; opacity: 0.72; }
.community-consult { margin: 14px 0 0; color: var(--text-secondary); font-size: 0.78rem; }
.community-consult button { padding: 0; border: 0; border-bottom: 1px solid rgba(183,157,116,0.55); background: transparent; color: var(--accent-gold); font: inherit; letter-spacing: 0.04em; cursor: pointer; }
.community-consult button:focus-visible { outline: 2px solid rgba(183,157,116,0.4); outline-offset: 3px; }

.contact-info {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 20px;
  background: rgba(183,157,116,0.06);
  border: 1px solid rgba(183,157,116,0.16);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.contact-info:hover { background: rgba(183,157,116,0.1); border-color: rgba(183,157,116,0.34); }
.contact-info:active { transform: translateY(1px); }
.contact-info:focus-visible { outline: 2px solid rgba(183,157,116,0.42); outline-offset: 3px; }

.contact-label { font-size: 0.75rem; color: var(--text-muted); letter-spacing: 0.1em; }
.contact-value {
  font-size: 1rem;
  color: var(--accent-gold);
  font-family: var(--font-serif);
  letter-spacing: 0.05em;
}

.step-5-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.invite-card {
  width: 100%;
  margin-top: 18px;
  padding: 20px;
  text-align: center;
  border: 1px dashed rgba(183,157,116,0.3);
  background: rgba(255,254,249,0.42);
}
.invite-title { color: var(--dark-ink); font-size: 1rem; letter-spacing: 0.1em; margin-bottom: 5px; }
.invite-text { color: var(--text-muted); font-size: 0.78rem; line-height: 1.7; margin-bottom: 14px; }
.invite-button { font-size: 0.8rem; padding: 9px 20px; }

.auth-modal[hidden] { display: none; }
.auth-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
}
.auth-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(47,62,52,0.3);
  backdrop-filter: blur(7px);
}
.auth-letter {
  position: relative;
  width: min(100%, 390px);
  padding: 38px 30px 30px;
  background: #fffef9;
  border: 1px solid rgba(183,157,116,0.28);
  border-radius: 4px;
  box-shadow: 0 24px 70px rgba(47,62,52,0.2);
}
.auth-letter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 46px;
  height: 2px;
  transform: translateX(-50%);
  background: var(--accent-gold);
}
.auth-close {
  position: absolute;
  top: 12px;
  right: 14px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.35rem;
  cursor: pointer;
}
.auth-eyebrow { color: var(--accent-gold); font-size: 0.76rem; letter-spacing: 0.16em; margin-bottom: 10px; }
.auth-title { color: var(--dark-ink); font-size: 1.35rem; font-weight: 400; line-height: 1.5; margin-bottom: 8px; }
.auth-copy { color: var(--text-muted); font-size: 0.82rem; margin-bottom: 24px; }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin-bottom: 20px; padding: 3px; border: 1px solid rgba(183,157,116,0.22); background: rgba(244,241,232,0.5); }
.auth-tab { padding: 9px; border: 0; background: transparent; color: var(--text-muted); font: inherit; font-size: 0.82rem; cursor: pointer; }
.auth-tab.active { background: #fffef9; color: var(--dark-ink); box-shadow: 0 2px 10px rgba(47,62,52,0.07); }
.auth-label { display: block; color: var(--text-secondary); font-size: 0.76rem; margin-bottom: 7px; }
.auth-password-label { margin-top: 14px; }
.auth-input {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid rgba(183,157,116,0.3);
  border-radius: 3px;
  background: rgba(244,241,232,0.38);
  color: var(--dark-ink);
  font: inherit;
  outline: none;
}
.auth-input:focus { border-color: var(--accent-gold); box-shadow: 0 0 0 3px rgba(183,157,116,0.08); }
.auth-code { letter-spacing: 0.28em; text-align: center; }
.auth-submit { width: 100%; margin-top: 14px; }
.auth-link { display: block; margin: 14px auto 0; border: 0; background: transparent; color: var(--accent-gold); cursor: pointer; }
.auth-message { min-height: 22px; margin-top: 12px; color: #a65d51; font-size: 0.78rem; text-align: center; }

.account-modal[hidden] { display: none; }
.account-modal { position: fixed; inset: 0; z-index: 110; display: grid; place-items: center; padding: 20px; }
.account-backdrop { position: absolute; inset: 0; border: 0; background: rgba(47,62,52,0.34); backdrop-filter: blur(8px); }
.account-letter { position: relative; width: min(100%, 430px); max-height: calc(100dvh - 32px); overflow: auto; padding: 36px 26px 24px; background: #fffef9; border: 1px solid rgba(183,157,116,0.3); box-shadow: 0 24px 70px rgba(47,62,52,0.22); }
.account-email { margin: -2px 0 18px; color: var(--text-muted); font-size: 0.78rem; word-break: break-all; }
.account-times { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-bottom: 24px; background: rgba(183,157,116,0.18); border: 1px solid rgba(183,157,116,0.18); }
.account-times div { padding: 12px; background: rgba(244,241,232,0.65); }
.account-times span, .account-times strong { display: block; font-size: 0.7rem; font-weight: 400; }
.account-times span { color: var(--text-muted); margin-bottom: 4px; }
.account-times strong { color: var(--text-secondary); }
.history-heading { display: flex; align-items: baseline; justify-content: space-between; padding-bottom: 10px; border-bottom: 1px solid rgba(183,157,116,0.2); }
.history-heading p { color: var(--dark-ink); letter-spacing: 0.12em; }
.history-heading span { color: var(--text-muted); font-size: 0.68rem; }
.history-list { min-height: 92px; }
.history-open { display: block; padding: 12px 0; border: 0; background: transparent; color: var(--accent-gold); font: inherit; font-size: 0.78rem; cursor: pointer; }
.history-open:focus-visible { outline: 2px solid var(--accent-gold); outline-offset: 3px; }
.history-full-text { white-space: pre-wrap; color: var(--text-secondary); font-size: 0.86rem; line-height: 1.9; margin: 12px 0 24px; }
.history-hex-lines { width: 64px; margin: 12px 0; }
.history-yao { display: flex; gap: 7px; margin: 5px 0; }
.history-yao span { height: 4px; flex: 1; background: var(--accent-gold); }
.history-yao.yang { gap: 0; }
.history-entry { padding: 15px 2px; border-bottom: 1px solid rgba(183,157,116,0.16); }
.history-meta { color: var(--accent-gold); font-size: 0.68rem; letter-spacing: 0.06em; }
.history-question { margin: 5px 0 4px; color: var(--dark-ink); font-family: var(--font-serif); font-size: 0.88rem; line-height: 1.65; }
.history-answer { display: -webkit-box; overflow: hidden; color: var(--text-muted); font-size: 0.74rem; line-height: 1.7; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.history-empty { padding: 26px 0; color: var(--text-muted); font-size: 0.78rem; text-align: center; }
.account-switch { width: 100%; margin-top: 20px; padding: 11px; border: 1px solid rgba(166,93,81,0.22); background: transparent; color: #a65d51; font: inherit; font-size: 0.76rem; cursor: pointer; }
.account-membership { width: 100%; margin-top: 20px; padding: 12px; border: 1px solid var(--primary-mist); background: var(--primary-mist); color: #fffef9; font: inherit; font-size: 0.8rem; letter-spacing: 0.06em; cursor: pointer; }
.account-membership + .account-switch { margin-top: 10px; }

.membership-modal[hidden] { display: none; }
.membership-modal { position: fixed; inset: 0; z-index: 140; display: grid; place-items: center; padding: 18px; }
.membership-backdrop { position: absolute; inset: 0; border: 0; background: rgba(47,62,52,0.42); backdrop-filter: blur(8px); }
.membership-letter { position: relative; width: min(100%, 420px); max-height: calc(100dvh - 28px); overflow: auto; padding: 34px 26px 26px; background: #fffef9; border: 1px solid rgba(183,157,116,0.3); box-shadow: 0 24px 70px rgba(47,62,52,0.24); }
.membership-plans { display: grid; gap: 8px; margin: 18px 0; }
.membership-plan { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 13px 15px; border: 1px solid rgba(183,157,116,0.22); background: rgba(244,241,232,0.45); color: var(--dark-ink); text-align: left; cursor: pointer; }
.membership-plan.selected { border-color: var(--primary-mist); background: rgba(110,139,116,0.1); box-shadow: inset 3px 0 0 var(--primary-mist); }
.membership-plan span, .membership-plan strong, .membership-plan small { display: block; }
.membership-plan strong { font: 500 0.9rem var(--font-serif); letter-spacing: 0.06em; }
.membership-plan small { margin-top: 3px; color: var(--text-muted); font-size: 0.69rem; }
.membership-plan b { color: var(--accent-gold); font: 500 1rem var(--font-serif); }
.membership-payment { padding: 15px; background: rgba(244,241,232,0.5); text-align: center; }
.membership-payment img { display: block; width: min(100%, 230px); margin: 10px auto 8px; background: #fff; }
.membership-selection { color: var(--dark-ink) !important; font: 500 0.86rem var(--font-serif); }
.membership-payment p { margin: 0; color: var(--text-muted); font-size: 0.7rem; }
.membership-note { margin-top: 14px; padding: 12px; border: 1px dashed rgba(183,157,116,0.34); text-align: center; }
.membership-note p { margin: 0 0 5px; color: var(--text-muted); font-size: 0.7rem; }
.membership-note strong { display: block; color: var(--dark-ink); font-size: 0.76rem; word-break: break-all; }
.membership-note button, .membership-help button { margin-top: 7px; padding: 0; border: 0; border-bottom: 1px solid rgba(183,157,116,0.55); background: transparent; color: var(--accent-gold); font: inherit; cursor: pointer; }
.membership-help { margin: 13px 3px 0; color: var(--text-muted); font-size: 0.7rem; line-height: 1.7; text-align: center; }
.membership-help button { margin-top: 0; }

/* === 分享画签预览 === */
.share-preview[hidden] { display: none; }
.share-preview { position: fixed; inset: 0; z-index: 120; display: grid; place-items: center; padding: 20px; }
.share-preview-backdrop { position: absolute; inset: 0; border: 0; background: rgba(47,62,52,0.5); backdrop-filter: blur(8px); }
.share-preview-sheet { position: relative; width: min(100%, 430px); max-height: calc(100dvh - 32px); overflow: auto; padding: 26px 22px 22px; background: #fffef9; border: 1px solid rgba(183,157,116,0.3); box-shadow: 0 24px 70px rgba(47,62,52,0.28); text-align: center; }
.share-preview-close { position: absolute; top: 8px; right: 12px; border: 0; background: transparent; color: var(--text-muted); font-size: 1.35rem; cursor: pointer; }
.share-preview-eyebrow { color: var(--accent-gold); font-size: 0.72rem; letter-spacing: 0.16em; }
.share-preview-title { margin: 4px 0 15px; color: var(--dark-ink); font-size: 1.22rem; font-weight: 400; }
.share-preview-frame { padding: 7px; background: var(--bg-rice); border: 1px solid rgba(183,157,116,0.22); }
.share-preview-frame img { display: block; width: 100%; height: auto; -webkit-touch-callout: default; user-select: auto; }
.share-preview-tip { margin-top: 13px; color: var(--text-secondary); font-size: 0.78rem; letter-spacing: 0.06em; }
.share-system-button { width: 100%; margin-top: 14px; }
.share-system-button[hidden] { display: none; }

@media (max-width: 640px) {
  .btn-back { top: max(12px, env(safe-area-inset-top)); left: 12px; padding: 5px 10px; background: rgba(255,254,249,0.82); }
  .share-preview { padding: 10px; align-items: end; }
  .share-preview-sheet { width: 100%; max-height: calc(100dvh - 10px); padding: 24px 15px 18px; border-radius: 12px 12px 0 0; }
}

/* === Rate Limit Toast === */
.rate-limit-toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--dark-ink);
  color: var(--bg-rice);
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  z-index: 200;
  opacity: 0;
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
  text-align: center;
  max-width: 90vw;
  line-height: 1.6;
  box-shadow: 0 4px 24px rgba(47, 62, 52, 0.25);
}
.rate-limit-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(4px);
}