/* ============================================================
   江雪·問天  —  中國水墨風格介面
   ============================================================ */

/* ---------- CSS 變量 ---------- */
:root {
  --ink: #1a1008;
  --ink-light: #3d2b1f;
  --rice: #f5f0e8;
  --rice-dark: #e8dcc8;
  --gold: #c8960c;
  --gold-light: #e8b84b;
  --red: #8b1a1a;
  --red-bright: #c0392b;
  --blue-ink: #1a3a5c;
  --grey-ink: #6b6b5a;
  --shadow-ink: rgba(26,16,8,0.4);
}

/* ---------- 基礎重設 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Noto Serif SC', 'Ma Shan Zheng', serif;
  background: #0d0a06;
  color: var(--rice);
  overflow: hidden;
  height: 100dvh;
  width: 100vw;
  position: relative;
}

/* ---------- 水墨背景山水 ---------- */
.ink-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(ellipse 120% 60% at 50% 110%, #0a0704 0%, transparent 70%),
    linear-gradient(180deg, #0d0a06 0%, #1a1208 40%, #0d0a06 100%);
}

.mountain {
  position: absolute;
  bottom: 0;
  opacity: 0.18;
}

.mountain::before {
  content: '';
  position: absolute;
  border-style: solid;
  border-color: transparent;
  border-bottom-color: #2a2015;
}

.mountain-1 {
  left: -5%;
  width: 55%;
  height: 55vh;
  background: radial-gradient(ellipse 90% 100% at 50% 100%, #1c1508 0%, transparent 70%);
  clip-path: polygon(0% 100%, 30% 10%, 60% 60%, 100% 100%);
}
.mountain-2 {
  right: -10%;
  width: 65%;
  height: 65vh;
  background: radial-gradient(ellipse 90% 100% at 50% 100%, #141005 0%, transparent 70%);
  clip-path: polygon(0% 100%, 35% 5%, 65% 50%, 100% 100%);
}
.mountain-3 {
  left: 20%;
  width: 60%;
  height: 40vh;
  background: radial-gradient(ellipse 90% 100% at 50% 100%, #201809 0%, transparent 70%);
  clip-path: polygon(0% 100%, 50% 20%, 100% 100%);
  opacity: 0.12;
}

/* ---------- 雪花 ---------- */
#snow-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.snowflake {
  position: absolute;
  top: -10px;
  color: #d0cfc0;
  font-size: 1em;
  animation: snowfall linear infinite;
  opacity: 0;
  user-select: none;
}

@keyframes snowfall {
  0%   { transform: translateY(-10px) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.8; }
  90%  { opacity: 0.6; }
  100% { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}

/* ---------- 畫面容器 ---------- */
.screen {
  position: fixed;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: opacity 0.8s ease;
  opacity: 0;
}
.screen.active {
  display: flex;
  opacity: 1;
}
.screen.fade-in {
  animation: fadeIn 0.8s ease forwards;
}
.screen.fade-out {
  animation: fadeOut 0.5s ease forwards;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }

/* ============================================================
   開場畫面
   ============================================================ */
.intro-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  max-width: 600px;
  width: 100%;
}

/* 詩句動畫 */
.poem-container {
  text-align: center;
  line-height: 1;
}

.poem-line {
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(1.8rem, 5vw, 3rem);
  color: var(--rice);
  letter-spacing: 0.3em;
  opacity: 0;
  transform: translateY(20px);
  animation: riseIn 1s ease forwards;
  text-shadow: 0 0 30px rgba(200,150,12,0.3), 0 2px 4px var(--shadow-ink);
  display: block;
  padding: 0.2em 0;
}

.poem-author {
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  color: var(--gold);
  letter-spacing: 0.2em;
  opacity: 0;
  margin-top: 1rem;
  animation: riseIn 1s ease forwards;
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.intro-desc {
  text-align: center;
  color: var(--grey-ink);
  font-size: clamp(0.8rem, 2vw, 1rem);
  line-height: 2;
  opacity: 0;
  animation: fadeIn 1.5s ease 2.5s forwards;
}

/* ---------- 古風按鈕 ---------- */
.btn-ancient {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  letter-spacing: 0.3em;
  color: var(--gold);
  background: transparent;
  border: 1px solid var(--gold);
  padding: 0.7em 2.5em;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
  clip-path: polygon(8px 0%, calc(100% - 8px) 0%, 100% 8px, 100% calc(100% - 8px), calc(100% - 8px) 100%, 8px 100%, 0% calc(100% - 8px), 0% 8px);
  opacity: 0;
  animation: fadeIn 1s ease 3s forwards;
}
.btn-ancient::before, .btn-ancient::after {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  border-color: var(--gold-light);
  border-style: solid;
  transition: all 0.3s;
}
.btn-ancient::before { top: -2px; left: -2px; border-width: 2px 0 0 2px; }
.btn-ancient::after  { bottom: -2px; right: -2px; border-width: 0 2px 2px 0; }
.btn-ancient:hover {
  background: rgba(200,150,12,0.15);
  box-shadow: 0 0 20px rgba(200,150,12,0.3);
  color: var(--gold-light);
  letter-spacing: 0.4em;
}
.btn-ancient.btn-sm {
  font-size: 0.85rem;
  padding: 0.4em 1.2em;
  animation: none;
  opacity: 1;
}

/* API Key 輸入 */
.settings-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fadeIn 1s ease 3.5s forwards;
}
.lbl-api {
  font-size: 0.82rem;
  color: var(--grey-ink);
  letter-spacing: 0.1em;
}
.input-ancient {
  font-family: monospace;
  font-size: 0.82rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid #4a3820;
  color: var(--rice);
  padding: 0.4em 0.8em;
  width: 220px;
  outline: none;
  border-radius: 2px;
}
.input-ancient:focus { border-color: var(--gold); }

/* ============================================================
   遊戲主畫面
   ============================================================ */
#screen-game {
  justify-content: flex-start;
  padding: 0;
}

/* 章節頂欄 */
.chapter-bar {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.5rem;
  background: rgba(10,8,4,0.85);
  border-bottom: 1px solid #3a2810;
  backdrop-filter: blur(4px);
  z-index: 20;
}
#chapter-title {
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(1rem, 3vw, 1.3rem);
  color: var(--gold);
  letter-spacing: 0.2em;
}
.fate-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--grey-ink);
}
.fate-track {
  width: 100px;
  height: 6px;
  background: #2a1e10;
  border: 1px solid #4a3820;
  border-radius: 3px;
  overflow: hidden;
}
.fate-fill {
  height: 100%;
  width: 50%;
  background: linear-gradient(90deg, var(--blue-ink), var(--gold));
  transition: width 0.8s ease;
  border-radius: 3px;
}
#fate-value { color: var(--gold); font-size: 0.85rem; min-width: 24px; }

/* 場景區 */
.scene-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 1rem 1rem 0.5rem;
  flex: 0 0 auto;
}
.scene-icon {
  font-size: 3rem;
  font-family: 'Ma Shan Zheng', serif;
  color: var(--gold);
  line-height: 1;
  filter: drop-shadow(0 0 12px rgba(200,150,12,0.4));
}
.scene-title {
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(1rem, 3vw, 1.4rem);
  color: var(--gold);
  letter-spacing: 0.25em;
}

/* 對話區 */
.dialogue-area {
  display: flex;
  gap: 1rem;
  width: 100%;
  max-width: 800px;
  padding: 0.8rem 1.2rem;
  flex: 1 1 auto;
  align-items: flex-start;
  min-height: 0;
}

.character-portrait {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  flex: 0 0 auto;
}
.portrait-frame {
  width: clamp(60px, 10vw, 80px);
  height: clamp(60px, 10vw, 80px);
  border: 2px solid var(--gold);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,16,8,0.7);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 10px rgba(200,150,12,0.1), 0 0 15px rgba(200,150,12,0.15);
}
.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2px;
  filter: sepia(20%) contrast(1.1);
}
.portrait-char {
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(2rem, 5vw, 2.6rem);
  color: var(--gold);
  opacity: 0.9;
  line-height: 1;
  user-select: none;
}
.portrait-frame::before, .portrait-frame::after {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  border-color: var(--gold-light);
  border-style: solid;
}
.portrait-frame::before { top: -3px; left: -3px; border-width: 2px 0 0 2px; }
.portrait-frame::after  { bottom: -3px; right: -3px; border-width: 0 2px 2px 0; }

.portrait-name {
  font-size: clamp(0.7rem, 2vw, 0.85rem);
  color: var(--gold);
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.dialogue-box {
  flex: 1;
  background: rgba(10,8,4,0.75);
  border: 1px solid #4a3820;
  border-radius: 4px;
  padding: 1rem 1.2rem;
  min-height: 100px;
  position: relative;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.3);
}
.dialogue-box::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 20px;
  border-style: solid;
  border-width: 6px 8px 6px 0;
  border-color: transparent #4a3820 transparent transparent;
}

.dialogue-text {
  font-size: clamp(0.85rem, 2.2vw, 1.05rem);
  line-height: 1.9;
  color: var(--rice);
  min-height: 3em;
  white-space: pre-wrap;
}

.typing-cursor {
  display: inline-block;
  color: var(--gold);
  animation: blink 0.7s infinite;
  font-weight: bold;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* 選項區 */
.choices-area {
  width: 100%;
  max-width: 800px;
  padding: 0.5rem 1.2rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.choice-btn {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(0.82rem, 2vw, 0.98rem);
  letter-spacing: 0.1em;
  color: var(--rice);
  background: rgba(26,16,8,0.6);
  border: 1px solid #4a3820;
  padding: 0.65em 1.2em;
  cursor: pointer;
  text-align: left;
  transition: all 0.25s ease;
  position: relative;
  clip-path: polygon(6px 0%, calc(100% - 6px) 0%, 100% 6px, 100% calc(100% - 6px), calc(100% - 6px) 100%, 6px 100%, 0% calc(100% - 6px), 0% 6px);
}
.choice-btn::before {
  content: '◈ ';
  color: var(--gold);
  font-size: 0.8em;
}
.choice-btn:hover {
  background: rgba(200,150,12,0.12);
  border-color: var(--gold);
  color: var(--gold-light);
  padding-left: 1.6em;
}

/* 繼續按鈕 */
.btn-continue {
  animation: none;
  opacity: 1;
  align-self: flex-end;
  margin: 0 1.2rem 0.8rem;
  font-size: 0.9rem;
  padding: 0.5em 1.8em;
}

/* AI 狀態徽章 */
.ai-badge {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: rgba(10,8,4,0.85);
  border: 1px solid var(--gold);
  padding: 0.4em 0.9em;
  font-size: 0.75rem;
  color: var(--gold);
  border-radius: 2px;
  letter-spacing: 0.1em;
  animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.5} }

/* ============================================================
   結局畫面
   ============================================================ */
.ending-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  padding: 2rem;
  max-width: 680px;
  width: 100%;
  text-align: center;
}

.ending-seal {
  width: 80px;
  height: 80px;
  border: 3px solid var(--red);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Ma Shan Zheng', serif;
  font-size: 2.5rem;
  color: var(--red);
  box-shadow: 0 0 20px rgba(139,26,26,0.4), inset 0 0 10px rgba(139,26,26,0.1);
  transform: rotate(-5deg);
  text-shadow: 0 0 10px rgba(192,57,43,0.6);
}

.ending-title {
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  color: var(--gold);
  letter-spacing: 0.3em;
  text-shadow: 0 0 20px rgba(200,150,12,0.4);
}

.ending-poem {
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(1rem, 3vw, 1.3rem);
  color: var(--rice);
  line-height: 2.2;
  letter-spacing: 0.2em;
  border-left: 3px solid var(--gold);
  padding-left: 1rem;
  text-align: left;
}

.ending-desc {
  font-size: clamp(0.85rem, 2.2vw, 1rem);
  color: var(--grey-ink);
  line-height: 1.9;
  max-width: 500px;
}

.ending-tags {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
}
.tag {
  font-size: 0.75rem;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 0.25em 0.8em;
  letter-spacing: 0.15em;
}

.ending-history {
  font-size: 0.82rem;
  color: #5a5040;
  line-height: 1.8;
  border-top: 1px solid #3a2810;
  padding-top: 1rem;
  max-width: 500px;
  text-align: left;
}

/* ============================================================
   載入覆蓋層
   ============================================================ */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  align-items: center;
  justify-content: center;
  z-index: 999;
  backdrop-filter: blur(4px);
}
#loading-overlay.active {
  display: flex;
}

.loading-ink {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  color: var(--gold);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
}

.ink-drop {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
  animation: inkPulse 1.2s ease-in-out infinite;
}
@keyframes inkPulse {
  0%,100% { transform: scale(0.6); opacity: 0.4; }
  50%      { transform: scale(1); opacity: 1; }
}

/* ============================================================
   自由對話輸入區
   ============================================================ */
.chat-area {
  width: 100%;
  max-width: 800px;
  padding: 0 1.2rem 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* 對話紀錄 */
.chat-history {
  max-height: 160px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: #4a3820 transparent;
}
.chat-history::-webkit-scrollbar { width: 4px; }
.chat-history::-webkit-scrollbar-thumb { background: #4a3820; border-radius: 2px; }

/* 對話氣泡 */
.chat-bubble {
  max-width: 85%;
  padding: 0.5em 0.9em;
  border-radius: 3px;
  font-size: clamp(0.8rem, 1.9vw, 0.92rem);
  line-height: 1.75;
  animation: fadeIn 0.3s ease;
}
.chat-bubble.player {
  align-self: flex-end;
  background: rgba(200,150,12,0.12);
  border: 1px solid rgba(200,150,12,0.35);
  color: var(--rice);
}
.chat-bubble.player::before {
  content: '你：';
  color: var(--gold);
  font-size: 0.78em;
  display: block;
  margin-bottom: 0.2em;
}
.chat-bubble.character {
  align-self: flex-start;
  background: rgba(255,255,255,0.05);
  border: 1px solid #3a2810;
  color: var(--rice);
}
.chat-bubble.character .bubble-name {
  color: var(--gold);
  font-size: 0.78em;
  display: block;
  margin-bottom: 0.2em;
}

/* 輸入行 */
.chat-input-row {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}
.chat-textarea {
  flex: 1;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(0.82rem, 1.9vw, 0.95rem);
  background: rgba(255,255,255,0.06);
  border: 1px solid #4a3820;
  color: var(--rice);
  padding: 0.55em 0.85em;
  resize: none;
  outline: none;
  border-radius: 3px;
  line-height: 1.6;
  transition: border-color 0.2s;
}
.chat-textarea:focus { border-color: var(--gold); }
.chat-textarea::placeholder { color: #5a5040; }

.btn-send {
  font-family: 'Noto Serif SC', serif;
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--gold);
  border: none;
  padding: 0.55em 1.1em;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
  align-self: stretch;
}
.btn-send:hover { background: var(--gold-light); }
.btn-send:active { transform: scale(0.97); }
.btn-send:disabled { background: #4a3820; color: #6b6b5a; cursor: not-allowed; }

.chat-hint {
  font-size: 0.72rem;
  color: #5a5040;
  letter-spacing: 0.05em;
  text-align: right;
}

/* 建議問題 chips */
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.1rem 0;
}
.suggestion-chip {
  font-family: 'Noto Serif SC', serif;
  font-size: 0.74rem;
  padding: 0.3em 0.85em;
  background: rgba(200,150,12,0.08);
  border: 1px solid rgba(200,150,12,0.4);
  color: var(--gold);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.suggestion-chip:hover {
  background: rgba(200,150,12,0.22);
  border-color: var(--gold);
}

/* 音樂控制按鈕 */
.music-toggle {
  position: fixed;
  bottom: 1.2rem;
  right: 1.2rem;
  width: 40px;
  height: 40px;
  background: rgba(26,16,8,0.85);
  border: 1px solid rgba(200,150,12,0.45);
  border-radius: 50%;
  color: rgba(200,150,12,0.7);
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s, color 0.25s, box-shadow 0.25s;
  line-height: 1;
  padding: 0;
  font-family: serif;
}
.music-toggle:hover,
.music-toggle.playing {
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 0 10px rgba(200,150,12,0.3);
}

/* ============================================================
   捲軸裝飾線（橫向分隔）
   ============================================================ */
.divider {
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.4;
}

/* ============================================================
   RWD
   ============================================================ */
@media (max-height: 600px) {
  .scene-area { padding: 0.4rem 1rem 0.2rem; }
  .scene-icon { font-size: 2rem; }
  .dialogue-area { padding: 0.4rem 1rem; }
  .choices-area { padding: 0.3rem 1rem 0.5rem; }
}

/* ============================================================
   歷史背景 & 玩法介紹畫面
   ============================================================ */
#screen-background {
  overflow: hidden;
  justify-content: flex-start;
  align-items: stretch;
}

.bg-scroll-wrap {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem 3rem;
}

.bg-content {
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* 頂部標題 */
.bg-header {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}
.bg-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: 2px solid var(--gold);
  border-radius: 4px;
  font-family: 'Ma Shan Zheng', serif;
  font-size: 1.8rem;
  color: var(--gold);
  margin-bottom: 0.6rem;
  box-shadow: 0 0 14px rgba(200,150,12,0.25);
}
.bg-title {
  font-family: 'Ma Shan Zheng', serif;
  font-size: 2.2rem;
  color: var(--gold-light);
  letter-spacing: 0.15em;
}
.bg-subtitle {
  margin-top: 0.3rem;
  color: var(--grey-ink);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

/* 分節 */
.bg-section {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(200,150,12,0.18);
  border-radius: 8px;
  padding: 1.4rem 1.5rem;
}
.bg-section-you {
  border-color: rgba(200,150,12,0.45);
  background: rgba(200,150,12,0.06);
}
.bg-section-title {
  font-family: 'Ma Shan Zheng', serif;
  font-size: 1.15rem;
  color: var(--gold);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(200,150,12,0.2);
}
.bg-history-img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 1rem;
  display: block;
  border: 1px solid rgba(200,150,12,0.2);
}

.bg-section-body {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  color: var(--rice);
  font-size: 0.95rem;
  line-height: 1.8;
}
.bg-section-body strong { color: var(--gold-light); }

/* 人物資料卡 */
.bg-person-card {
  margin-bottom: 1rem;
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
}
.bg-person-portrait {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid rgba(200,150,12,0.45);
  box-shadow: 0 0 16px rgba(200,150,12,0.2);
}
.bg-person-info {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.bg-person-row {
  display: flex;
  gap: 0.8rem;
  font-size: 0.93rem;
  line-height: 1.6;
  color: var(--rice);
}
.bg-label {
  flex-shrink: 0;
  width: 2.8em;
  color: var(--gold);
  font-weight: 600;
}

/* 詩歌框 */
.bg-poem-box {
  margin-top: 0.8rem;
  padding: 1rem 1.2rem;
  background: rgba(0,0,0,0.25);
  border-left: 3px solid var(--gold);
  border-radius: 0 6px 6px 0;
}
.bg-poem-text {
  font-family: 'Ma Shan Zheng', serif;
  font-size: 1.05rem;
  color: var(--rice);
  line-height: 2;
  letter-spacing: 0.05em;
}
.bg-poem-note {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--grey-ink);
  line-height: 1.7;
}

/* 列表 */
.bg-list {
  margin: 0.3rem 0 0.3rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--rice-dark);
}

/* 玩法四格 */
.bg-how-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.bg-how-item {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  background: rgba(0,0,0,0.2);
  border-radius: 6px;
  padding: 0.8rem;
}
.bg-how-icon {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(200,150,12,0.15);
  border: 1px solid rgba(200,150,12,0.35);
  border-radius: 4px;
  font-family: 'Ma Shan Zheng', serif;
  font-size: 1.1rem;
  color: var(--gold);
}
.bg-how-text {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--rice);
}
.bg-how-text strong { color: var(--gold-light); }

/* 底部按鈕 */
.bg-start-wrap {
  text-align: center;
  padding-bottom: 1rem;
}
.bg-start-hint {
  margin-bottom: 1rem;
  color: var(--grey-ink);
  font-size: 0.95rem;
  font-style: italic;
  letter-spacing: 0.05em;
}
.btn-start-game {
  font-size: 1.1rem !important;
  padding: 0.9rem 2.5rem !important;
  letter-spacing: 0.15em !important;
}

@media (max-width: 480px) {
  .bg-how-grid { grid-template-columns: 1fr; }
  .bg-section { padding: 1rem 1rem; }
}