/* ============================================
   潮汐锁定 · 永不分离 | 卡戎 × 辰砂 《绿洲》售后特典
   样式文件 style.css
   ============================================ */

/* ==================== 基础重置 ==================== */
*, *::before, *::after { box-sizing: border-box; }
img, video { max-width: 100%; height: auto; display: block; }
body { overflow-wrap: break-word; margin: 0; }

/* 平滑滚动 */
html { scroll-behavior: smooth; }

/* 全局字体与背景 */
body {
  font-family: "Noto Serif SC", serif;
  background: hsl(250 45% 6%);
  color: hsl(220 30% 88%);
  overflow-x: hidden;
}

/* ==================== 星空 Canvas 背景 ==================== */
#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* 星云光晕（模糊圆形，营造深空氛围） */
.nebula-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
}

/* ==================== 渐变文字 ==================== */
/* 金色渐变（卡戎主题色） */
.text-gradient-gold {
  background: linear-gradient(135deg, hsl(45 95% 75%), hsl(35 90% 55%));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 月蓝色渐变（辰砂主题色） */
.text-gradient-moon {
  background: linear-gradient(135deg, hsl(210 90% 80%), hsl(230 70% 60%));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 双色渐变（金+月蓝） */
.text-gradient-duo {
  background: linear-gradient(135deg, hsl(45 95% 70%) 0%, hsl(210 85% 72%) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ==================== 潮汐锁定行星系统 ==================== */
.binary-system {
  position: relative;
  width: 320px;
  height: 320px;
}
@media (min-width: 768px) {
  .binary-system { width: 420px; height: 420px; }
}

/* 冥王星（辰砂的象征） */
.pluto {
  position: absolute;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, hsl(280 30% 55%), hsl(260 40% 25%) 60%, hsl(250 50% 15%));
  box-shadow:
    inset -10px -10px 30px hsla(250,60%,5%,0.8),
    inset 8px 8px 20px hsla(280,40%,70%,0.3),
    0 0 40px hsla(260,60%,50%,0.4),
    0 0 80px hsla(260,60%,50%,0.2);
  top: 50%;
  left: 22%;
  transform: translate(-50%, -50%);
}
/* 冥王星表面纹理 */
.pluto::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(ellipse at 60% 70%, hsla(290,30%,60%,0.4) 0%, transparent 30%),
    radial-gradient(ellipse at 25% 45%, hsla(270,25%,50%,0.3) 0%, transparent 25%),
    radial-gradient(ellipse at 75% 30%, hsla(260,35%,45%,0.3) 0%, transparent 20%);
}

/* 卡戎星（卡戎的象征） */
.charon {
  position: absolute;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, hsl(45 80% 75%), hsl(35 60% 45%) 70%, hsl(25 50% 25%));
  box-shadow:
    inset -5px -5px 15px hsla(25,50%,10%,0.7),
    inset 4px 4px 10px hsla(45,90%,85%,0.4),
    0 0 25px hsla(45,90%,60%,0.5),
    0 0 50px hsla(45,90%,60%,0.2);
  top: 50%;
  right: 18%;
  transform: translate(50%, -50%);
}
/* 卡戎星表面纹理 */
.charon::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(ellipse at 60% 65%, hsla(30,50%,55%,0.4) 0%, transparent 35%);
}

/* 轨道环 */
.orbit-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 1px dashed hsla(220, 40%, 60%, 0.25);
  border-radius: 50%;
  pointer-events: none;
}

/* 行星围绕共同质心（barycenter）运行 */
@keyframes orbitPluto {
  from { transform: rotate(0deg) translateX(55px) rotate(0deg); }
  to   { transform: rotate(360deg) translateX(55px) rotate(-360deg); }
}
@keyframes orbitCharon {
  from { transform: rotate(180deg) translateX(110px) rotate(-180deg); }
  to   { transform: rotate(540deg) translateX(110px) rotate(-540deg); }
}
.pluto-orbit { animation: orbitPluto 25s linear infinite; }
.charon-orbit { animation: orbitCharon 25s linear infinite; }

/* 质心标记点 */
.barycenter {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 4px;
  background: hsla(45, 90%, 70%, 0.6);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 10px hsla(45, 90%, 70%, 0.8);
}

/* ==================== Section 通用样式 ==================== */
section {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.5rem;
}
.section-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

/* ==================== 滚动渐入动画 ==================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }
.reveal-delay-4 { transition-delay: 0.6s; }

/* ==================== 章节标题 ==================== */
.chapter-label {
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  letter-spacing: 0.3em;
  font-size: 0.85rem;
  color: hsl(45 90% 70%);
  text-transform: uppercase;
}
.chapter-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.3;
}

/* ==================== 语录卡片 ==================== */
.quote-card {
  background: linear-gradient(145deg, hsla(255,40%,15%,0.7), hsla(260,50%,10%,0.5));
  border: 1px solid hsla(220, 40%, 50%, 0.2);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  cursor: pointer;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}
/* 顶部金色光线（hover时显示） */
.quote-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, hsl(45 90% 65%), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}
.quote-card:hover {
  border-color: hsla(45, 90%, 65%, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -20px hsla(45, 90%, 50%, 0.3);
}
.quote-card:hover::before { opacity: 1; }

/* 预览模式：截断显示 */
.quote-card .quote-preview {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* 展开模式：显示全文 */
.quote-card .quote-full {
  display: none;
  line-height: 1.9;
}
.quote-card.expanded .quote-preview { display: none; }
.quote-card.expanded .quote-full { display: block; }
.quote-card.expanded {
  background: linear-gradient(145deg, hsla(255,40%,18%,0.9), hsla(260,50%,12%,0.8));
  border-color: hsla(45, 90%, 65%, 0.5);
}

/* ==================== 信物卡片 ==================== */
.token-card {
  background: linear-gradient(180deg, hsla(255,40%,14%,0.6), hsla(260,50%,8%,0.4));
  border: 1px solid hsla(220, 40%, 50%, 0.15);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all 0.5s ease;
}
.token-card:hover {
  transform: translateY(-8px);
  border-color: hsla(45, 90%, 65%, 0.4);
  box-shadow: 0 30px 60px -20px hsla(260, 70%, 30%, 0.5);
}
.token-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

/* ==================== 卡戎日记（信件质感） ==================== */
.diary-page {
  background:
    linear-gradient(180deg, hsla(45, 30%, 92%, 0.97), hsla(40, 25%, 85%, 0.95));
  color: hsl(25 30% 20%);
  border-radius: 4px;
  padding: 3rem 2.5rem;
  max-width: 640px;
  margin: 0 auto;
  box-shadow:
    0 30px 80px -20px hsla(0, 0%, 0%, 0.7),
    inset 0 0 60px hsla(35, 40%, 60%, 0.2);
  position: relative;
  font-family: "Noto Serif SC", serif;
  line-height: 2;
}
/* 信纸横线纹理 */
.diary-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      transparent,
      transparent 31px,
      hsla(25, 40%, 40%, 0.12) 31px,
      hsla(25, 40%, 40%, 0.12) 32px
    );
  pointer-events: none;
  border-radius: 4px;
}
/* 左侧红色装订线 */
.diary-page::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 50px;
  width: 1px;
  background: hsla(0, 60%, 50%, 0.25);
}

/* ==================== 分隔符 ==================== */
.divider-star {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: hsl(45 90% 70% / 0.6);
  margin: 2rem 0;
}
.divider-star::before,
.divider-star::after {
  content: '';
  height: 1px;
  width: 60px;
  background: linear-gradient(90deg, transparent, hsl(45 90% 70% / 0.4), transparent);
}

/* ==================== 音乐按钮 ==================== */
.music-btn {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  background: hsla(255, 40%, 12%, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid hsla(45, 90%, 65%, 0.3);
  color: hsl(45 90% 75%);
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.3s ease;
}
.music-btn:hover {
  background: hsla(45, 90%, 65%, 0.15);
  border-color: hsla(45, 90%, 75%, 0.6);
}
.music-btn.playing .music-note {
  animation: musicPulse 1s ease-in-out infinite;
}
@keyframes musicPulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: 0.6; transform: scale(0.9); }
}

/* ==================== 导航点 ==================== */
.nav-dots {
  position: fixed;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
@media (max-width: 768px) {
  .nav-dots { display: none; }
}
.nav-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: hsla(220, 30%, 60%, 0.3);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}
.nav-dot:hover,
.nav-dot.active {
  background: hsl(45 90% 70%);
  box-shadow: 0 0 12px hsla(45, 90%, 65%, 0.8);
  transform: scale(1.3);
}
/* 导航点 hover 时显示标签 */
.nav-dot::after {
  content: attr(data-label);
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  font-size: 0.75rem;
  color: hsl(45 90% 80%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  font-family: "Cormorant Garamond", serif;
  letter-spacing: 0.1em;
}
.nav-dot:hover::after { opacity: 1; }

/* ==================== 花瓣飘落 ==================== */
#petals {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}
.petal {
  position: absolute;
  width: 12px;
  height: 12px;
  background: radial-gradient(circle, hsl(45 95% 80%), hsl(40 85% 60%));
  border-radius: 50% 0 50% 50%;
  opacity: 0.7;
  animation: petalFall linear infinite;
}
@keyframes petalFall {
  0% {
    transform: translateY(-20px) rotate(0deg);
    opacity: 0;
  }
  10% { opacity: 0.8; }
  90% { opacity: 0.6; }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ==================== 流星 ==================== */
.meteor {
  position: absolute;
  width: 2px;
  height: 80px;
  background: linear-gradient(to bottom, hsla(45,95%,85%,0.9), transparent);
  transform: rotate(-45deg);
  animation: meteorShoot linear infinite;
  opacity: 0;
}
@keyframes meteorShoot {
  0%   { transform: translateX(0) translateY(0) rotate(-45deg); opacity: 0; }
  5%   { opacity: 1; }
  100% { transform: translateX(-600px) translateY(600px) rotate(-45deg); opacity: 0; }
}

/* ==================== 手稿飘落（天鹅港章节） ==================== */
.manuscript {
  position: absolute;
  width: 60px;
  height: 80px;
  background: linear-gradient(180deg, hsla(45, 40%, 90%, 0.8), hsla(40, 30%, 75%, 0.6));
  border-radius: 2px;
  box-shadow: 0 4px 12px hsla(0, 0%, 0%, 0.3);
  animation: manuscriptFall 12s ease-in-out infinite;
}
/* 手稿内部文字线 */
.manuscript::before {
  content: '';
  position: absolute;
  inset: 10px 8px;
  background-image: repeating-linear-gradient(
    transparent,
    transparent 6px,
    hsla(25, 30%, 40%, 0.3) 6px,
    hsla(25, 30%, 40%, 0.3) 7px
  );
}
@keyframes manuscriptFall {
  0%   { transform: translateY(-100px) rotate(-15deg); opacity: 0; }
  15%  { opacity: 0.9; }
  100% { transform: translateY(110vh) rotate(25deg); opacity: 0; }
}

/* ==================== 戒指浮动动画 ==================== */
.ring-float {
  animation: ringFloat 4s ease-in-out infinite;
}
@keyframes ringFloat {
  0%,100% { transform: translateY(0) rotate(-5deg); }
  50%     { transform: translateY(-15px) rotate(5deg); }
}

/* ==================== 跳舞摇摆动画 ==================== */
@keyframes danceSway {
  0%,100% { transform: rotate(-3deg); }
  50%     { transform: rotate(3deg); }
}
.dance-couple { animation: danceSway 3s ease-in-out infinite; transform-origin: bottom center; }

/* ==================== 滚动提示 ==================== */
.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: hsla(45, 90%, 75%, 0.6);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  animation: scrollBounce 2s ease-in-out infinite;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
}
@keyframes scrollBounce {
  0%,100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50%     { transform: translateX(-50%) translateY(10px); opacity: 1; }
}

/* ==================== 下一章按钮 ==================== */
.next-chapter-btn {
  position: fixed;
  right: 2rem;
  bottom: 2.5rem;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  background: hsla(250, 40%, 10%, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid hsla(45, 90%, 65%, 0.3);
  border-radius: 999px;
  color: hsla(45, 90%, 75%, 0.7);
  font-family: "Cormorant Garamond", serif;
  font-size: 0.9rem;
  font-style: italic;
  letter-spacing: 0.1em;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 0 hsla(45, 90%, 65%, 0);
}

/* 按钮显示状态 */
.next-chapter-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

/* 悬停效果 */
.next-chapter-btn:hover {
  color: hsl(45 95% 80%);
  border-color: hsla(45, 90%, 65%, 0.6);
  background: hsla(250, 40%, 12%, 0.8);
  box-shadow:
    0 0 20px hsla(45, 90%, 65%, 0.25),
    0 0 40px hsla(45, 90%, 65%, 0.1),
    inset 0 0 20px hsla(45, 90%, 65%, 0.05);
  transform: translateY(-2px);
}

/* 箭头动画 */
.next-chapter-arrow {
  display: inline-block;
  transition: transform 0.3s ease;
  font-size: 0.8rem;
}
.next-chapter-btn:hover .next-chapter-arrow {
  transform: translateX(4px);
}

/* 标签文字 */
.next-chapter-label {
  transition: color 0.3s ease;
}

/* 响应式：移动端隐藏（空间有限，用导航点替代） */
@media (max-width: 768px) {
  .next-chapter-btn {
    right: 1rem;
    bottom: 1.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }
}

/* ==================== 日落大道渐变背景 ==================== */
.sunset-bg {
  background: radial-gradient(ellipse at bottom center,
    hsla(30, 90%, 50%, 0.15) 0%,
    hsla(340, 70%, 30%, 0.1) 30%,
    transparent 70%);
}

/* ==================== 婚礼光效 ==================== */
.wedding-glow {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, hsla(45, 95%, 70%, 0.25), transparent 70%);
  filter: blur(30px);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: weddingPulse 4s ease-in-out infinite;
}
@keyframes weddingPulse {
  0%,100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
  50%     { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

/* ==================== 小提琴装饰动画 ==================== */
.violin-deco {
  font-size: 2.5rem;
  display: inline-block;
  animation: violinPlay 3s ease-in-out infinite;
}
@keyframes violinPlay {
  0%,100% { transform: rotate(-10deg); }
  50%     { transform: rotate(10deg); }
}

/* ==================== 洋甘菊花田（底部装饰） ==================== */
.chamomile-field {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background:
    radial-gradient(ellipse 30px 40px at 10% 80%, hsl(45 95% 75%) 30%, transparent 70%),
    radial-gradient(ellipse 25px 35px at 25% 70%, hsl(42 90% 65%) 30%, transparent 70%),
    radial-gradient(ellipse 35px 45px at 40% 85%, hsl(45 95% 72%) 30%, transparent 70%),
    radial-gradient(ellipse 28px 38px at 55% 75%, hsl(40 85% 60%) 30%, transparent 70%),
    radial-gradient(ellipse 32px 42px at 70% 82%, hsl(45 95% 70%) 30%, transparent 70%),
    radial-gradient(ellipse 26px 36px at 85% 72%, hsl(42 90% 68%) 30%, transparent 70%),
    radial-gradient(ellipse 30px 40px at 95% 80%, hsl(45 95% 75%) 30%, transparent 70%);
  opacity: 0.6;
  pointer-events: none;
}

/* ==================== 向导手册（信物装饰） ==================== */
.guide-book {
  width: 100px;
  height: 130px;
  margin: 0 auto;
  background: linear-gradient(135deg, hsl(215 60% 35%), hsl(225 70% 20%));
  border-radius: 4px 8px 8px 4px;
  position: relative;
  box-shadow:
    inset -4px 0 8px hsla(0,0%,0%,0.4),
    4px 4px 20px hsla(0,0%,0%,0.5);
}
.guide-book::before {
  content: '向导手册';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-90deg);
  color: hsl(45 90% 75%);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  white-space: nowrap;
  font-family: "Noto Serif SC", serif;
}
.guide-book::after {
  content: '';
  position: absolute;
  top: 8px; bottom: 8px;
  left: 12px;
  width: 1px;
  background: hsla(45, 90%, 75%, 0.3);
}

/* ==================== 白巧克力（信物装饰） ==================== */
.chocolate {
  width: 60px;
  height: 50px;
  margin: 0 auto;
  background: linear-gradient(180deg, hsl(45 40% 88%), hsl(35 35% 72%));
  border-radius: 6px;
  position: relative;
  box-shadow:
    inset 0 -4px 8px hsla(25, 30%, 50%, 0.3),
    0 6px 16px hsla(0,0%,0%,0.3);
}
/* 巧克力分格线 */
.chocolate::before {
  content: '';
  position: absolute;
  inset: 6px;
  background:
    linear-gradient(90deg, transparent 48%, hsla(25, 30%, 50%, 0.2) 48%, hsla(25, 30%, 50%, 0.2) 52%, transparent 52%),
    linear-gradient(0deg, transparent 48%, hsla(25, 30%, 50%, 0.2) 48%, hsla(25, 30%, 50%, 0.2) 52%, transparent 52%);
  border-radius: 2px;
}

/* ==================== 响应式调整 ==================== */
@media (max-width: 640px) {
  section { padding: 4rem 1rem; }
  .diary-page { padding: 2rem 1.25rem; }
  .diary-page::after { left: 25px; }
  .music-btn { top: 1rem; right: 1rem; font-size: 0.7rem; padding: 0.5rem 1rem; }
}