:root {
  /* 实测请柬纸色（原图留白中位色）。页面留白用同一个色，
     图片 object-fit: contain 的周边空档就与画面纸色完全一致，看不出边界。 */
  --paper: #f0eadf;
  --paper-deep: #e8e0d1;
  --ink: #4a4238;
  --accent: #a63a32;
  --gold: #c9a25e;
}

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

/* 整页不滚动，滚动交给 #pager（这样翻页吸附才稳，也不会触发下拉刷新）。
   注意作用域：notice.html / card.html 也引用本文件、且自身是长文档，
   所以只对声明了 .page-lock 的页面加锁，不能写成全局 html, body。 */
html { scroll-behavior: smooth; }
html.page-lock,
html.page-lock body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 520px;
  margin: 0 auto;
  height: 100vh;
  height: 100dvh;
  position: relative;
  overflow: hidden;
}

/* ---------- 封面 ---------- */
#cover {
  position: fixed;
  inset: 0;
  z-index: 100;
  background:
    radial-gradient(circle at 50% 18%, rgba(255,255,255,.75), transparent 55%),
    var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .9s ease, visibility .9s;
}
#cover.opened { opacity: 0; visibility: hidden; pointer-events: none; }

.cover-inner { text-align: center; padding: 32px; animation: rise 1.1s ease both; }

.cover-doodle { font-size: 22px; color: var(--gold); letter-spacing: 12px; margin-bottom: 22px; }

.cover-names {
  font-family: "Snell Roundhand", "Brush Script MT", "STKaiti", cursive;
  font-weight: 400;
  font-size: clamp(44px, 13vw, 64px);
  line-height: 1.15;
  color: var(--accent);
}
.cover-names .amp {
  display: block;
  font-size: .55em;
  color: var(--gold);
  margin: 4px 0;
}

.cover-divider { color: var(--gold); font-size: 13px; letter-spacing: 2px; margin: 26px 0 18px; }

.cover-date {
  font-size: 22px;
  letter-spacing: 6px;
  font-weight: 600;
  color: var(--ink);
}
.cover-venue { margin-top: 10px; font-size: 14px; letter-spacing: 3px; color: #7a7060; }

#open-btn {
  margin-top: 44px;
  padding: 14px 52px;
  font-size: 16px;
  letter-spacing: 8px;
  text-indent: 8px;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(166, 58, 50, .32);
  transition: transform .25s ease, box-shadow .25s ease;
}
#open-btn:active { transform: scale(.95); }

.cover-hint { margin-top: 18px; font-size: 11px; letter-spacing: 4px; color: #b3a996; text-transform: uppercase; }

@keyframes rise {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 花瓣 ---------- */
#petals {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  overflow: hidden;
}
#petals i {
  position: absolute;
  top: -4vh;
  width: 12px;
  height: 12px;
  background: radial-gradient(circle at 30% 30%, #f3c6c2, #e59a94);
  border-radius: 80% 0 80% 0;
  opacity: 0;
  animation: fall linear infinite;
}
@keyframes fall {
  0%   { opacity: 0; transform: translate3d(0, -5vh, 0) rotate(0deg); }
  8%   { opacity: .85; }
  100% { opacity: 0; transform: translate3d(-6vw, 108vh, 0) rotate(560deg); }
}

/* ================= 整屏翻页 ================= */
/* 关键：滚动条只在这里；每页正好一屏高；scroll-snap 负责"一滑一页"。 */
#pager {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
  overscroll-behavior-y: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  scrollbar-width: none;
  opacity: 0;
  transition: opacity .8s ease .2s;
}
#pager::-webkit-scrollbar { display: none; }
#app.started #pager { opacity: 1; }

.page {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  /* 吸附到每页顶部；scroll-snap-stop: always 防止快速一滑跨过多页 */
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.page-img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;   /* 整页图完整显示，四周留白与画面纸色同色 */
}

/* 首屏动图：视频是灰调背景，满屏铺满（cover）才不会有米色边框；
   平板/桌面等较宽的屏幕改回 contain，避免裁掉人物。 */
.hero-video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  background: var(--paper);
}
@media (min-aspect-ratio: 3/4) {
  .hero-video { object-fit: contain; }
}

/* 翻到本页时内容轻微淡入放大（不依赖 JS 也存在：默认就是完全可见） */
.page.in > .page-img { animation: pageIn .9s cubic-bezier(.22,.61,.36,1) both; }
@keyframes pageIn {
  from { opacity: 0; transform: scale(1.025); }
  to   { opacity: 1; transform: none; }
}

/* 首屏下滑提示（浮在视频上） */
.scroll-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(20px + env(safe-area-inset-bottom));
  text-align: center;
  pointer-events: none;
  transition: opacity .4s ease;
}
.scroll-hint span {
  display: block;
  width: 1.5px;
  height: 34px;
  margin: 0 auto;
  background: linear-gradient(rgba(255,255,255,.95), rgba(255,255,255,0));
  filter: drop-shadow(0 1px 3px rgba(0,0,0,.35));
  animation: drip 1.8s ease infinite;
}
@keyframes drip {
  0%   { transform: scaleY(0); transform-origin: top; }
  45%  { transform: scaleY(1); transform-origin: top; }
  55%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 最后一页：操作区 ---------- */
.page-actions {
  flex-direction: column;
  padding: calc(24px + env(safe-area-inset-top)) 24px calc(28px + env(safe-area-inset-bottom));
  text-align: center;
}
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  max-width: 300px;
  margin: 0 auto 14px;
  padding: 14px 0;
  font-size: 15px;
  letter-spacing: 2px;
  text-decoration: none;
  color: var(--ink);
  background: #fff;
  border: 1px solid #ddd2bd;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(90, 75, 50, .08);
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  color: #fff;
  background: var(--accent);
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(166, 58, 50, .28);
}
.btn-guide {
  color: #7a5c22;
  background: #fdf8ec;
  border-color: #e6d7b4;
  font-weight: 500;
}
.ico { font-size: 17px; }
.thanks { margin-top: 18px; font-size: 13px; letter-spacing: 3px; color: #8a8070; }

/* 操作区入场错落 */
.page-actions.in .btn,
.page-actions.in .thanks {
  animation: pageIn .7s cubic-bezier(.22,.61,.36,1) both;
  animation-delay: calc(var(--i, 0) * 90ms + 60ms);
}

/* ---------- 右侧翻页圆点 ---------- */
#dots {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  z-index: 70;
  opacity: 0;
  transition: opacity .6s ease .5s;
}
#app.started #dots { opacity: 1; }
#dots button {
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  background: none;
  display: grid;
  place-items: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
#dots button::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(74, 66, 56, .22);
  box-shadow: 0 1px 2px rgba(255,255,255,.6);
  transition: background .3s ease, transform .3s ease;
}
#dots button[aria-current="true"]::before {
  background: var(--accent);
  transform: scale(1.5);
}

/* 尊重"减少动态效果"偏好 */
@media (prefers-reduced-motion: reduce) {
  .page.in > .page-img,
  .page-actions.in .btn,
  .page-actions.in .thanks { animation: none; }
  #petals { display: none; }
}