/* ==========================================================================
   主题变量 —— 颜色会由 js/config.js 的 theme 字段自动覆盖
   ========================================================================== */
:root{
  --primary:#8ec9ff;
  --secondary:#b9a6ff;
  --accent:#ffd08a;
  --bg-deep:#0a1024;

  --text:#eef4ff;
  --text-soft:rgba(238,244,255,.74);
  --text-faint:rgba(238,244,255,.44);

  --card:rgba(255,255,255,.055);
  --card-line:rgba(255,255,255,.12);
  --radius:20px;
  --radius-sm:12px;

  --ease:cubic-bezier(.22,1,.36,1);
  --maxw:1080px;
}

/* ==========================================================================
   基础
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(130% 90% at 50% 0%, rgba(142,201,255,.10) 0%, transparent 55%),
    radial-gradient(110% 80% at 80% 100%, rgba(185,166,255,.10) 0%, transparent 60%),
    var(--bg-deep);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden}

img{max-width:100%;display:block}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}

::selection{background:var(--primary);color:#06182e}

/* 滚动条 */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  background:linear-gradient(var(--primary),var(--secondary));
  border-radius:99px;border:3px solid var(--bg-deep);
}

/* ==========================================================================
   背景层
   --------------------------------------------------------------------------
   照片 + 遮罩的两层背景，具体照片和浓度由 js/config.js 的 theme 决定；
   没配置照片时 --bg-photo 为 none，自动回到纯夜空底色。
   ========================================================================== */
.bg-layer{
  position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;
  background-image:var(--bg-overlay,none), var(--bg-photo,none);
  background-size:cover, cover;
  background-position:center, center 42%;
  background-repeat:no-repeat, no-repeat;
}

#motes{position:absolute;inset:0;width:100%;height:100%;opacity:.9}

.bg-glow{
  position:absolute;border-radius:50%;filter:blur(90px);opacity:.32;
  animation:float 18s var(--ease) infinite alternate;
}
.bg-glow--1{width:46vw;height:46vw;background:var(--primary);top:-12vw;left:-10vw}
.bg-glow--2{width:40vw;height:40vw;background:var(--secondary);bottom:-14vw;right:-8vw;animation-delay:-6s}
.bg-glow--3{width:30vw;height:30vw;background:var(--accent);top:42%;left:52%;opacity:.16;animation-delay:-11s}

@keyframes float{
  from{transform:translate3d(0,0,0) scale(1)}
  to{transform:translate3d(4vw,-5vh,0) scale(1.18)}
}

.bg-noise{
  position:absolute;inset:0;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ==========================================================================
   开场遮罩
   ========================================================================== */
.intro{
  position:fixed;inset:0;z-index:100;
  display:grid;place-items:center;padding:24px;
  /* 半透明：让背后飘动的星光透出来，比纯色遮罩更有氛围 */
  background:radial-gradient(120% 120% at 50% 40%,rgba(16,31,61,.70) 0%,rgba(10,16,36,.88) 62%);
  transition:opacity .9s var(--ease),visibility .9s;
}
.intro.is-gone{opacity:0;visibility:hidden;pointer-events:none}

/* 开场遮罩是半透明的，若不藏起正文，首屏文字会透上来和遮罩文字叠成重影。
   这里用「遮罩尚未消失」来判断，而不是 body.is-locked —— 后者在打开灯箱时
   也会被加上，会导致看大图时正文跟着淡出。 */
#main{transition:opacity .8s var(--ease)}
.intro:not([hidden]):not(.is-gone) ~ main{opacity:0}

.intro__card{text-align:center;max-width:520px;animation:riseIn 1.1s var(--ease) both}

.intro__badge{
  display:inline-block;padding:6px 16px;margin-bottom:26px;
  font-size:12px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--primary);border:1px solid rgba(142,201,255,.35);
  border-radius:99px;background:rgba(142,201,255,.08);
}

.intro__title{
  margin:0 0 16px;font-size:clamp(26px,5.6vw,42px);
  font-weight:800;line-height:1.35;letter-spacing:.01em;
  /* 让两行长度接近，避免出现「…亲手拆 / 开」这种把词拆散的断行 */
  text-wrap:balance;
  background:linear-gradient(120deg,#fff 10%,var(--primary) 50%,var(--secondary) 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

.intro__hint{margin:0 0 34px;color:var(--text-faint);font-size:14px;letter-spacing:.06em}

.intro__btn{
  animation:pulseGlow 2.6s ease-in-out infinite;
}

/* ==========================================================================
   按钮
   ========================================================================== */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  gap:10px;padding:15px 42px;border-radius:99px;
  font-size:16px;font-weight:700;letter-spacing:.1em;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),filter .35s var(--ease);
  overflow:hidden;
}
.btn::after{
  content:"";position:absolute;inset:0;border-radius:inherit;
  background:linear-gradient(100deg,transparent 25%,rgba(255,255,255,.45) 50%,transparent 75%);
  transform:translateX(-120%);
}
.btn:hover::after{animation:sheen .9s var(--ease)}
.btn:hover{transform:translateY(-3px) scale(1.03)}
.btn:active{transform:translateY(0) scale(.98)}

.btn--primary{
  color:#06182e;
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  box-shadow:0 10px 34px -10px var(--primary),0 0 0 1px rgba(255,255,255,.14) inset;
}
.btn--accent{
  color:#2a1a00;
  background:linear-gradient(120deg,var(--accent),var(--primary));
  box-shadow:0 10px 34px -10px var(--accent),0 0 0 1px rgba(255,255,255,.16) inset;
}
.btn--big{padding:19px 62px;font-size:18px}

@keyframes sheen{to{transform:translateX(120%)}}
@keyframes pulseGlow{
  0%,100%{box-shadow:0 10px 34px -10px var(--primary),0 0 0 0 rgba(142,201,255,.42)}
  50%{box-shadow:0 14px 42px -8px var(--primary),0 0 0 16px rgba(142,201,255,0)}
}
@keyframes riseIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

/* ==========================================================================
   工具条 / 音乐按钮
   ========================================================================== */
.toolbar{position:fixed;top:18px;right:18px;z-index:60;display:flex;gap:10px}

.icon-btn{
  width:48px;height:48px;display:grid;place-items:center;border-radius:50%;
  background:var(--card);border:1px solid var(--card-line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .3s var(--ease),border-color .3s,background .3s;
}
.icon-btn:hover{transform:scale(1.08);border-color:var(--primary)}
.icon-btn svg{width:21px;height:21px;fill:var(--text)}

.icon-play,.icon-pause{display:none}
#musicBtn:not(.is-playing) .icon-play{display:block}
#musicBtn:not(.is-playing) .icon-music{display:none}
#musicBtn.is-playing .icon-pause{display:none}
#musicBtn.is-playing .icon-music{display:block}
#musicBtn.is-playing .icon-music{animation:bob 1.1s ease-in-out infinite alternate}
@keyframes bob{from{transform:translateY(0)}to{transform:translateY(-2.5px)}}

/* 播放中的跳动音柱 */
.toolbar__bars{
  position:absolute;bottom:6px;display:none;gap:2px;align-items:flex-end;height:9px;
}
#musicBtn.is-playing .toolbar__bars{display:flex}
.toolbar__bars i{width:2px;background:var(--primary);border-radius:2px;animation:bar .9s ease-in-out infinite}
.toolbar__bars i:nth-child(1){height:4px;animation-delay:0s}
.toolbar__bars i:nth-child(2){height:8px;animation-delay:.18s}
.toolbar__bars i:nth-child(3){height:5px;animation-delay:.36s}
.toolbar__bars i:nth-child(4){height:7px;animation-delay:.54s}
@keyframes bar{0%,100%{transform:scaleY(.4)}50%{transform:scaleY(1)}}

/* ==========================================================================
   布局
   ========================================================================== */
main{position:relative;z-index:1}

.section{
  position:relative;z-index:1;
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(72px,13vh,140px) clamp(20px,5vw,40px);
}
.section--center{text-align:center}

.section__head{margin-bottom:clamp(34px,6vw,60px);text-align:center}
.section__title{
  margin:0 0 10px;font-size:clamp(24px,4.4vw,36px);font-weight:800;letter-spacing:.02em;
  background:linear-gradient(120deg,#fff,var(--primary) 70%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.section__subtitle{margin:0;color:var(--text-faint);font-size:14px;letter-spacing:.08em}

/* ==========================================================================
   首屏
   ========================================================================== */
.hero{
  position:relative;z-index:1;
  min-height:100svh;min-height:100vh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:120px 24px 90px;
}
.hero__inner{max-width:820px}

.hero__kicker{
  margin:0 0 18px;font-size:clamp(12px,2.4vw,14px);
  letter-spacing:.5em;text-transform:uppercase;color:var(--primary);
}
.hero__name{
  margin:0 0 22px;
  font-size:clamp(44px,12vw,104px);font-weight:900;line-height:1.08;letter-spacing:.02em;
  background:linear-gradient(115deg,#fff 8%,var(--primary) 42%,var(--secondary) 72%,var(--accent) 100%);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:sheenText 9s ease-in-out infinite;
  filter:drop-shadow(0 8px 40px rgba(142,201,255,.32));
}
@keyframes sheenText{
  0%,100%{background-position:0% 50%}
  50%{background-position:100% 50%}
}
.hero__subtitle{margin:0 0 12px;font-size:clamp(15px,3vw,20px);color:var(--text-soft);letter-spacing:.06em}
.hero__date{margin:0;font-size:13px;letter-spacing:.28em;color:var(--text-faint)}

.hero__scroll{
  position:absolute;bottom:34px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.16em;color:var(--text-faint);
  animation:fadeBob 2.6s ease-in-out infinite;
}
.hero__arrow{
  width:1px;height:34px;
  background:linear-gradient(var(--primary),transparent);
}
@keyframes fadeBob{
  0%,100%{opacity:.5;transform:translateX(-50%) translateY(0)}
  50%{opacity:1;transform:translateX(-50%) translateY(7px)}
}

/* ==========================================================================
   计时器
   ========================================================================== */
.counter-section{padding-top:0;text-align:center}
.counter{
  display:inline-block;padding:clamp(28px,5vw,46px) clamp(34px,7vw,70px);
  border-radius:28px;background:var(--card);border:1px solid var(--card-line);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:0 24px 70px -34px rgba(0,0,0,.9);
}
.counter__prefix{margin:0 0 6px;font-size:13px;letter-spacing:.32em;color:var(--text-faint)}
.counter__num{
  font-size:clamp(48px,13vw,96px);font-weight:900;line-height:1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(120deg,var(--primary),var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.counter__num.is-tick{animation:tick .5s var(--ease)}
@keyframes tick{from{transform:translateY(-10px);opacity:.4}to{transform:none;opacity:1}}
.counter__suffix{margin:8px 0 0;font-size:clamp(14px,3vw,18px);color:var(--text-soft);letter-spacing:.2em}
.counter__start{
  margin:16px 0 0;padding-top:14px;
  font-size:13.5px;letter-spacing:.14em;color:var(--accent);
  border-top:1px solid rgba(255,208,138,.22);
}
.counter__start::before{content:"✦ ";opacity:.7}
.counter__clock{margin:10px 0 0;font-size:13px;color:var(--text-faint);letter-spacing:.16em;font-variant-numeric:tabular-nums}

/* ==========================================================================
   照片墙
   ========================================================================== */
.gallery{
  display:grid;gap:clamp(12px,2vw,20px);
  grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));
}
.gallery__item{
  position:relative;margin:0;overflow:hidden;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--card-line);
  /* 横版比例：光遇截图基本都是横图，用横框能少裁掉很多画面 */
  aspect-ratio:4/3;cursor:zoom-in;
  transition:transform .55s var(--ease),box-shadow .55s var(--ease),border-color .4s;
}
.gallery__item:hover{
  transform:translateY(-7px) scale(1.015);
  border-color:rgba(142,201,255,.5);
  box-shadow:0 28px 60px -26px rgba(142,201,255,.5);
}
.gallery__item img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .8s var(--ease),filter .5s;
}
.gallery__item:hover img{transform:scale(1.08)}

/* 图片加载失败时的占位 */
.gallery__item.is-missing{
  display:grid;place-items:center;cursor:default;
  background:linear-gradient(140deg,rgba(142,201,255,.1),rgba(185,166,255,.1));
}
.gallery__item.is-missing img{display:none}
.gallery__item.is-missing::before{
  content:"截个图放进 assets/photos/ 就好啦";
  position:absolute;font-size:12px;letter-spacing:.1em;
  color:var(--text-faint);text-align:center;padding:0 16px;
}

.gallery__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:38px 16px 14px;margin:0;
  font-size:13px;letter-spacing:.06em;color:#fff;
  background:linear-gradient(transparent,rgba(10,4,16,.88));
  opacity:0;transform:translateY(10px);
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}
.gallery__item:hover .gallery__cap,
.gallery__item:focus-visible .gallery__cap{opacity:1;transform:none}

/* ==========================================================================
   时间线
   ========================================================================== */
/* 整块居中并限制宽度，避免在宽屏下缩在左侧、右边大片空白 */
.timeline{list-style:none;margin:0 auto;padding:0;position:relative;max-width:760px}
.timeline::before{
  content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--primary),var(--secondary),transparent);
  opacity:.55;
}
.timeline__item{position:relative;padding:0 0 38px 42px}
.timeline__item:last-child{padding-bottom:0}
.timeline__item::before{
  content:"";position:absolute;left:1px;top:9px;
  width:16px;height:16px;border-radius:50%;
  background:var(--bg-deep);
  border:2px solid var(--primary);
  box-shadow:0 0 0 5px rgba(142,201,255,.12);
  transition:transform .45s var(--ease),box-shadow .45s;
}
.timeline__item:hover::before{
  transform:scale(1.22);
  box-shadow:0 0 0 9px rgba(142,201,255,.2),0 0 20px var(--primary);
}
.timeline__date{
  display:inline-block;margin-bottom:6px;
  font-size:12px;letter-spacing:.24em;color:var(--primary);
}
.timeline__title{margin:0 0 6px;font-size:clamp(17px,3vw,21px);font-weight:700}
/* max-width 用 em 而不是 ch：ch 是数字"0"的宽度，中文下会窄得离谱 */
.timeline__text{margin:0;color:var(--text-soft);font-size:15px;line-height:1.9;max-width:46em}

/* ==========================================================================
   光遇里的小事（卡片）
   ========================================================================== */
.moments{
  display:grid;gap:clamp(12px,2vw,18px);
  grid-template-columns:repeat(auto-fit,minmax(min(250px,100%),1fr));
}
.moment{
  position:relative;padding:26px 22px 24px;
  border-radius:var(--radius);
  background:var(--card);border:1px solid var(--card-line);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:transform .5s var(--ease),border-color .4s,box-shadow .5s var(--ease),background .4s;
  overflow:hidden;
}
/* 卡片顶部的一缕烛光 */
.moment::before{
  content:"";position:absolute;top:0;left:22px;right:22px;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:0;transition:opacity .45s;
}
.moment:hover{
  transform:translateY(-6px);
  border-color:rgba(255,208,138,.45);
  background:rgba(255,255,255,.075);
  box-shadow:0 24px 54px -28px rgba(255,208,138,.55);
}
.moment:hover::before{opacity:1}

.moment__icon{
  display:block;margin-bottom:12px;font-size:26px;line-height:1;
  filter:drop-shadow(0 0 12px rgba(255,208,138,.55));
}
.moment__title{margin:0 0 8px;font-size:17px;font-weight:700;letter-spacing:.02em}
.moment__text{margin:0;font-size:14.5px;line-height:1.85;color:var(--text-soft)}

/* ==========================================================================
   悄悄话
   ========================================================================== */
.wishes{max-width:760px;margin:0 auto}
.wishes p{
  margin:0 0 22px;font-size:clamp(16px,2.9vw,20px);line-height:2;
  color:var(--text-soft);text-align:center;
}
.wishes p:first-child{color:var(--text);font-size:clamp(17px,3.2vw,22px)}
.wishes__sign{
  margin:36px 0 0;text-align:right;
  font-size:14px;letter-spacing:.14em;color:var(--primary);
}

/* ==========================================================================
   彩蛋
   ========================================================================== */
.surprise__msg{
  min-height:34px;margin:26px 0 0;
  font-size:clamp(18px,4vw,26px);font-weight:800;letter-spacing:.06em;
  color:var(--accent);
}
.surprise__msg.is-pop{animation:pop .7s var(--ease)}
@keyframes pop{
  0%{opacity:0;transform:scale(.6)}
  55%{opacity:1;transform:scale(1.14)}
  100%{transform:scale(1)}
}

/* ==========================================================================
   灯箱
   ========================================================================== */
.lightbox{
  position:fixed;inset:0;z-index:200;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;
  padding:clamp(14px,4vw,46px);
  background:rgba(8,3,14,.94);backdrop-filter:blur(10px);
  animation:fadeIn .3s ease;
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

.lightbox__figure{margin:0;display:grid;justify-items:center;gap:16px;max-height:100%}
.lightbox__figure img{
  max-height:76vh;max-width:100%;width:auto;
  border-radius:var(--radius);object-fit:contain;
  box-shadow:0 30px 90px -30px #000;
}
.lightbox__figure figcaption{
  font-size:14px;color:var(--text-soft);letter-spacing:.08em;text-align:center;
}

.lightbox__close{
  position:absolute;top:16px;right:20px;
  width:44px;height:44px;border-radius:50%;font-size:26px;line-height:1;
  background:var(--card);border:1px solid var(--card-line);
  transition:transform .3s var(--ease),border-color .3s;
}
.lightbox__close:hover{transform:rotate(90deg) scale(1.08);border-color:var(--primary)}

.lightbox__nav{
  width:52px;height:52px;border-radius:50%;font-size:20px;
  background:var(--card);border:1px solid var(--card-line);
  transition:transform .3s var(--ease),border-color .3s,background .3s;
}
.lightbox__nav:hover{transform:scale(1.1);border-color:var(--primary);background:rgba(142,201,255,.16)}
.lightbox__nav--prev{justify-self:start}
.lightbox__nav--next{justify-self:end}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer{
  position:relative;z-index:1;text-align:center;
  padding:60px 24px 54px;color:var(--text-faint);
  font-size:13px;letter-spacing:.16em;
}
.footer p{margin:0}
.footer__sub{margin-top:6px;font-size:11px;letter-spacing:.4em;opacity:.7}

/* ==========================================================================
   滚动出现动画
   ========================================================================== */
.reveal{opacity:0;transform:translateY(34px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

.timeline__item.reveal{transform:translateX(-24px)}
.timeline__item.reveal.is-in{transform:none}

.gallery__item.reveal{transform:translateY(40px) scale(.96)}
.gallery__item.reveal.is-in{transform:none}
.gallery__item.reveal.is-in:hover{transform:translateY(-7px) scale(1.015)}

/* ==========================================================================
   撒花
   ========================================================================== */
.confetti{
  position:fixed;top:-14px;z-index:300;pointer-events:none;
  width:9px;height:14px;border-radius:2px;
  animation:fall linear forwards;
}
@keyframes fall{
  to{transform:translate3d(var(--dx,0),105vh,0) rotate(var(--rot,540deg));opacity:.1}
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:720px){
  /* 手机上背景照片会被裁掉两侧（只露出中间约 1/3），
     位置偏左一点才能同时留住月亮和左下角的人物，且不把人裁掉 */
  .bg-layer{background-position:center, 33% center}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .gallery__item{aspect-ratio:4/3}
  .lightbox{grid-template-columns:1fr;justify-items:center}
  .lightbox__nav{position:absolute;bottom:20px}
  .lightbox__nav--prev{left:22%}
  .lightbox__nav--next{right:22%}
  .lightbox__figure img{max-height:64vh}
  .toolbar{top:12px;right:12px}
  .icon-btn{width:44px;height:44px}
}

@media (max-width:420px){
  .gallery{grid-template-columns:1fr}
  .wishes__sign{text-align:center}
}

/* ==========================================================================
   无障碍 / 降低动态效果
   ========================================================================== */
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}