/* =========================================================
   「银河很美」P1 极简 Demo
   ---------------------------------------------------------
   色彩系统：
     --ink  深空蓝（主背景/夜空）
     --gold 星辉金（点缀/标题）
     --moon 月白（正文/卡面）
     --ash  烟灰（卡片底）
   --------------------------------------------------------- */

:root {
  --ink: #0B1A35;
  --ink-deep: #050B1B;
  --gold: #E8C36A;
  --gold-soft: #C9A55A;
  --moon: #F5F2EA;
  --moon-dim: #C9C7BD;
  --ash: rgba(15, 26, 53, 0.62);
  --serif: "LXGW WenKai", "Kaiti SC", "KaiTi", "STKaiti", "Songti SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --maxw: 680px;
}

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

html, body {
  width: 100%;
  background: var(--ink-deep);
  color: var(--moon);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  /* 微信 X5/XWeb 内核：禁止文本自动缩放 */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  /* 全局滚动顺滑 */
  scroll-behavior: smooth;
}

img { display: block; max-width: 100%; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  /* 移动端：去掉双击缩放延迟 */
  touch-action: manipulation;
}

/* =========================================================
   幕 1 · 开篇
   ========================================================= */

.scene-opening {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
}

.bg-galaxy {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.bg-galaxy-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  /* 缓慢呼吸式缩放，模拟银河"还活着" */
  animation: galaxy-breathe 22s ease-in-out infinite;
  transform-origin: 60% 50%;
  filter: brightness(0.92) contrast(1.05) saturate(1.08);
}

@keyframes galaxy-breathe {
  0%, 100% { transform: scale(1.0); }
  50%      { transform: scale(1.06); }
}

.bg-galaxy-tint {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 38%, transparent 0%, rgba(5, 11, 27, 0.10) 35%, rgba(5, 11, 27, 0.55) 85%, rgba(5, 11, 27, 0.85) 100%),
    linear-gradient(180deg, rgba(5,11,27,0.30) 0%, rgba(5,11,27,0.10) 40%, rgba(5,11,27,0.75) 100%);
}

/* 流星容器 */
.meteors {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.meteor {
  position: absolute;
  top: -10%;
  width: 2px;
  height: 2px;
  background: var(--moon);
  border-radius: 50%;
  box-shadow: 0 0 6px 1px rgba(245, 242, 234, 0.8);
  opacity: 0;
  animation: meteor-fall linear forwards;
}

.meteor::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 80px;
  height: 1px;
  background: linear-gradient(90deg, rgba(245,242,234,0.0), rgba(245,242,234,0.95) 40%, rgba(245,242,234,0.0));
  transform-origin: 0 50%;
  transform: rotate(0deg) translateX(0);
}

@keyframes meteor-fall {
  0%   { opacity: 0; transform: translate3d(0, 0, 0); }
  6%   { opacity: 1; }
  85%  { opacity: 1; }
  100% { opacity: 0; transform: translate3d(-50vw, 90vh, 0); }
}

/* 开篇中心文 */
.opening-content {
  text-align: center;
  padding: 0 24px;
  max-width: var(--maxw);
}

.opening-line {
  color: var(--moon);
  margin: 0;
}

.opening-line--whisper {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.28em;
  color: var(--moon-dim);
  opacity: 0.85;
  margin-bottom: 22px;
  font-weight: 300;
}

.opening-line--title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(36px, 8vw, 56px);
  letter-spacing: 0.08em;
  line-height: 1.3;
  margin-bottom: 18px;
  color: var(--moon);
  /* 微光辉 */
  text-shadow:
    0 0 30px rgba(232, 195, 106, 0.18),
    0 0 60px rgba(232, 195, 106, 0.08);
  /* 入场动画 */
  opacity: 0;
  transform: translateY(16px);
  animation: rise-fade 1.6s ease-out 0.4s forwards;
}

.opening-line--date {
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.42em;
  color: var(--gold);
  opacity: 0;
  animation: rise-fade 1.6s ease-out 1.0s forwards;
}

.opening-line--whisper {
  opacity: 0;
  animation: rise-fade 1.6s ease-out 0.1s forwards;
}

@keyframes rise-fade {
  to { opacity: 1; transform: translateY(0); }
  from { opacity: 0; transform: translateY(16px); }
}

/* 向下引导 */
.opening-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--moon-dim);
  text-decoration: none;
  opacity: 0;
  animation: rise-fade 1.4s ease-out 1.6s forwards;
}

.opening-scroll-hint {
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--gold-soft);
}

.opening-scroll-arrow {
  width: 1px;
  height: 28px;
  background: linear-gradient(180deg, rgba(232,195,106,0.0), rgba(232,195,106,0.7) 50%, rgba(232,195,106,0.0));
  position: relative;
  animation: arrow-bob 2.4s ease-in-out infinite;
}

@keyframes arrow-bob {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50%      { transform: translateY(8px); opacity: 1; }
}

/* =========================================================
   幕 2 · 古今对照
   ========================================================= */

.scene-story {
  background:
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 25%, var(--ink) 75%, var(--ink-deep) 100%);
  padding: 96px 24px 80px;
  min-height: 100vh;
  min-height: 100svh;
}

.story-header {
  text-align: center;
  margin-bottom: 56px;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
}

.story-eyebrow {
  font-size: 11px;
  letter-spacing: 0.5em;
  color: var(--gold-soft);
  margin-bottom: 14px;
}

.story-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 6vw, 38px);
  letter-spacing: 0.18em;
  color: var(--moon);
  text-shadow: 0 0 30px rgba(232,195,106,0.10);
}

.story-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: var(--maxw);
  margin: 0 auto 56px;
}

@media (max-width: 540px) {
  .story-pair {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 40px;
  }
}

.story-card {
  position: relative;
  padding: 28px 22px 24px;
  border-radius: 4px;
  background: var(--ash);
  border: 1px solid rgba(232, 195, 106, 0.12);
  backdrop-filter: blur(2px);
}

.story-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--gold);
  opacity: 0.5;
}

.story-card-label {
  position: absolute;
  top: 14px;
  right: 14px;
  font-family: var(--serif);
  font-size: 14px;
  color: var(--gold-soft);
  letter-spacing: 0.2em;
  opacity: 0.7;
}

.story-verse {
  font-family: var(--serif);
  font-size: clamp(15.5px, 3.8vw, 17.5px);
  letter-spacing: 0.08em;
  line-height: 2.0;
  color: var(--moon);
}

.story-card--modern {
  background: rgba(232, 195, 106, 0.06);
}

.story-card--modern::before {
  background: rgba(245, 242, 234, 0.5);
}

.story-modern-line {
  font-size: clamp(15px, 3.8vw, 16.5px);
  line-height: 1.95;
  color: var(--moon);
  letter-spacing: 0.02em;
}

.story-modern-line--echo {
  margin-top: 10px;
  color: var(--gold);
  font-size: clamp(13px, 3.4vw, 14px);
  letter-spacing: 0.06em;
  opacity: 0.88;
}

/* =========================================================
   幕 3 · 结语
   ========================================================= */

.scene-closing {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  background:
    radial-gradient(ellipse at 50% 70%, rgba(11,26,53,0.85) 0%, rgba(5,11,27,0.98) 70%),
    var(--ink-deep);
  overflow: hidden;
  isolation: isolate;
}

/* 结语复用星图做底，淡化 */
.scene-closing::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/milky-way.jpg");
  background-size: cover;
  background-position: center 60%;
  opacity: 0.18;
  filter: blur(2px) brightness(0.8);
  z-index: -1;
}

.closing-content {
  text-align: center;
  max-width: var(--maxw);
  margin-bottom: 56px;
}

.closing-line {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(32px, 7vw, 46px);
  letter-spacing: 0.14em;
  color: var(--moon);
  text-shadow: 0 0 30px rgba(232,195,106,0.15);
}

.closing-sub {
  font-family: var(--serif);
  margin-top: 24px;
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--gold-soft);
  font-weight: 300;
}

.closing-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 320px;
}

.closing-share {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 20px;
  border: 1px solid var(--gold-soft);
  border-radius: 999px;
  color: var(--gold);
  font-size: 14px;
  letter-spacing: 0.24em;
  background: transparent;
  transition: all 0.4s ease;
}

.closing-share:hover, .closing-share:focus-visible {
  background: var(--gold);
  color: var(--ink-deep);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(232, 195, 106, 0.18);
  outline: none;
}

.closing-share:active {
  transform: translateY(0);
}

.closing-tip {
  font-size: 12px;
  color: var(--moon-dim);
  min-height: 1em;
  letter-spacing: 0.12em;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.closing-credit {
  position: absolute;
  bottom: 26px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--moon-dim);
  opacity: 0.5;
}

/* =========================================================
   小屏适配
   ========================================================= */

@media (max-width: 540px) {
  .scene-story { padding: 64px 20px 56px; }
  .story-header { margin-bottom: 36px; }
  .story-card { padding: 22px 18px 20px; }
  .opening-line--title { letter-spacing: 0.06em; }
  .opening-line--whisper { font-size: 12px; letter-spacing: 0.28em; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-galaxy-img, .opening-scroll-arrow { animation: none !important; }
  .meteor { display: none; }
}

/* iOS 安全区 */
@supports (padding: max(0px)) {
  .opening-scroll { bottom: max(36px, env(safe-area-inset-bottom)); }
  .closing-footer { margin-bottom: max(40px, env(safe-area-inset-bottom)); }
}