/* ===== 星河纪念页 · 星河夜空主题 ===== */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@300;400;500&family=Ma+Shan+Zheng&family=Noto+Serif+SC:wght@300;400;600&display=swap');

*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg1:#1a1140;--bg2:#0d0a2b;--bg3:#050314;
  --gold:#ffe9a8;--blue:#8ec5ff;--purple:#c4a0ff;--pink:#ff9ec7;
  --text:#eef0ff;--dim:#a8a4d0;--mute:#6c6896;
  --accent:#c4a0ff;--accent2:#ff9ec7;
  --card:rgba(255,255,255,.045);--card-hover:rgba(255,255,255,.075);
  --border:rgba(180,160,255,.16);
  --glow:rgba(196,160,255,.25);
  --serif:'Noto Serif SC',serif;
  --brush:'Ma Shan Zheng',cursive;
  --num:'Cormorant Garamond',serif;
}
html{scroll-behavior:smooth}
body{
  font-family:var(--serif);color:var(--text);line-height:1.85;
  overflow-x:hidden;min-height:100vh;
  background:
    radial-gradient(ellipse at 50% 0%,#221650 0%,var(--bg1) 30%,var(--bg2) 60%,var(--bg3) 100%);
  background-attachment:fixed;
}
::selection{background:var(--purple);color:#fff}
img{max-width:100%;display:block}

/* 画布层 */
canvas#bg{position:fixed;inset:0;z-index:0;pointer-events:none}
canvas#fireworks{position:fixed;inset:0;z-index:80;pointer-events:none;opacity:0;transition:opacity .4s}
canvas#fireworks.on{opacity:1}

/* 进度条 */
.progress-bar{position:fixed;top:0;left:0;height:2px;width:0;z-index:90;
  background:linear-gradient(90deg,var(--blue),var(--purple),var(--pink),var(--gold));
  box-shadow:0 0 10px var(--glow);transition:width .1s linear}

/* 导航 */
nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:transform .4s;
  background:rgba(10,8,25,.55);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border)}
nav.hide{transform:translateY(-100%)}
.nav-inner{max-width:1000px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:54px}
.nav-logo{font-family:var(--brush);font-size:1.4em;color:var(--purple);letter-spacing:3px;text-shadow:0 0 12px var(--glow)}
.nav-links{display:flex;gap:4px;flex-wrap:wrap}
.nav-links a{color:var(--dim);font-size:.78em;letter-spacing:2px;cursor:pointer;padding:6px 12px;border-radius:18px;transition:.3s}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(196,160,255,.12)}

/* 通用 */
.wrap{position:relative;z-index:1;max-width:1000px;margin:0 auto;padding:0 24px}
.section{padding:90px 0;min-height:60vh}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head .sec-idx{font-family:var(--num);font-size:1.3em;color:var(--purple);opacity:.5;letter-spacing:2px;display:block}
.sec-head h2{font-family:var(--brush);font-size:2em;font-weight:400;color:var(--text);letter-spacing:6px;margin-top:4px;text-shadow:0 0 18px var(--glow)}
.sec-head p{font-size:.85em;color:var(--dim);margin-top:8px;letter-spacing:1px}
.reveal{opacity:0;transform:translateY(34px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.show{opacity:1;transform:none}

/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.stars-pair{position:relative;width:200px;height:120px;margin-bottom:36px;animation:float 6s ease-in-out infinite}
.stars-pair .avatar{position:absolute;top:0;width:96px;height:96px;border-radius:50%;object-fit:cover;
  border:2px solid rgba(255,255,255,.5);box-shadow:0 0 30px var(--glow)}
.stars-pair .her{left:0}
.stars-pair .me{right:0}
.stars-pair::before{content:'♡';position:absolute;left:50%;top:34px;transform:translateX(-50%);
  font-size:1.4em;color:var(--pink);text-shadow:0 0 16px var(--pink);animation:pulse 2s ease-in-out infinite;z-index:2}
.stars-pair::after{content:'';position:absolute;inset:-14px;border-radius:50%;
  background:conic-gradient(from 0deg,var(--blue),var(--purple),var(--pink),var(--gold),var(--blue));
  filter:blur(10px);opacity:.3;animation:spin 14s linear infinite;z-index:-1}
.hero-title{font-family:var(--brush);font-size:3.4em;font-weight:400;letter-spacing:14px;color:var(--text);
  text-shadow:0 0 28px var(--glow);padding-left:14px}
.hero-sub{margin-top:18px;color:var(--dim);font-size:.92em;letter-spacing:3px}
.typewriter{margin-top:30px;min-height:9em;max-width:520px;color:var(--dim);font-size:.95em;line-height:2.1;white-space:pre-wrap}
.typewriter::after{content:'▌';color:var(--purple);animation:blink 1s step-end infinite}
.scroll-hint{margin-top:40px;color:var(--mute);font-size:.72em;letter-spacing:4px}
.scroll-hint i{display:inline-block;margin-left:6px;animation:bob 1.8s ease-in-out infinite}

/* ===== 数据总览 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:26px 16px;text-align:center;
  transition:.35s;backdrop-filter:blur(8px);position:relative;overflow:hidden}
.stat-card::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 0%,var(--glow),transparent 70%);opacity:0;transition:.4s}
.stat-card:hover{transform:translateY(-5px);border-color:var(--purple);background:var(--card-hover)}
.stat-card:hover::before{opacity:.5}
.stat-num{font-family:var(--num);font-size:2.6em;font-weight:300;line-height:1;color:var(--text);position:relative}
.stat-num .u{font-size:.4em;color:var(--dim);margin-left:2px}
.stat-label{font-size:.74em;color:var(--dim);margin-top:8px;letter-spacing:1px;position:relative}
.stat-card.hot .stat-num{color:var(--pink)}

/* ===== 热力图 ===== */
.heatmap-wrap{overflow-x:auto;padding:10px 0}
.heatmap-grid{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,1fr);gap:4px;min-width:560px}
.hm-cell{width:13px;height:13px;border-radius:3px;background:rgba(255,255,255,.04);transition:.2s;cursor:default}
.hm-cell:hover{transform:scale(1.5);box-shadow:0 0 8px var(--glow);z-index:2;position:relative}
.hm-cell.lv1{background:rgba(142,197,255,.28)}
.hm-cell.lv2{background:rgba(142,197,255,.55)}
.hm-cell.lv3{background:rgba(196,160,255,.75)}
.hm-cell.lv4{background:var(--pink);box-shadow:0 0 6px var(--pink)}
.heatmap-legend{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:18px;color:var(--mute);font-size:.72em}
.heatmap-legend i{width:13px;height:13px;border-radius:3px;display:inline-block}
.heatmap-legend .lv0{background:rgba(255,255,255,.04)}
.heatmap-legend .lv1{background:rgba(142,197,255,.28)}
.heatmap-legend .lv2{background:rgba(142,197,255,.55)}
.heatmap-legend .lv3{background:rgba(196,160,255,.75)}
.heatmap-legend .lv4{background:var(--pink)}

/* ===== 时间线 ===== */
.timeline-list{position:relative;max-width:760px;margin:0 auto;padding-left:8px}
.timeline-list::before{content:'';position:absolute;left:20px;top:0;bottom:0;width:2px;
  background:linear-gradient(var(--blue),var(--purple),var(--pink));opacity:.5}
.tl-item{position:relative;padding:0 0 36px 56px}
.tl-item::before{content:'';position:absolute;left:14px;top:4px;width:14px;height:14px;border-radius:50%;
  background:var(--purple);box-shadow:0 0 12px var(--purple);border:2px solid var(--bg2)}
.tl-month{font-family:var(--num);font-size:1.6em;color:var(--purple)}
.tl-count{color:var(--dim);font-size:.8em;margin-left:8px}
.tl-card{margin-top:12px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 20px;
  backdrop-filter:blur(8px);display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.tl-card img{width:64px;height:64px;border-radius:10px;object-fit:cover;flex-shrink:0;border:1px solid var(--border)}
.tl-quote{flex:1;min-width:200px;color:var(--text);font-size:.92em}
.tl-quote .q-who{color:var(--pink);font-size:.78em;margin-bottom:4px}
.tl-quote .q-time{color:var(--mute);font-size:.72em;margin-top:4px}

/* ===== 语录墙 ===== */
.quotes-wall{column-count:3;column-gap:16px}
.qcard{break-inside:avoid;margin-bottom:16px;background:var(--card);border:1px solid var(--border);
  border-radius:14px;padding:20px 18px;backdrop-filter:blur(8px);transition:.3s;position:relative}
.qcard:hover{transform:translateY(-4px);border-color:var(--purple);box-shadow:0 8px 30px rgba(0,0,0,.3)}
.qcard.me{border-left:2px solid var(--blue)}
.qcard.her{border-left:2px solid var(--pink)}
.qcard .q-text{color:var(--text);font-size:.92em;line-height:1.9}
.qcard .q-meta{margin-top:10px;font-size:.7em;color:var(--mute)}
.qcard .q-meta b{color:var(--purple);font-weight:400}
.center-btn{text-align:center;margin-top:36px}
.btn{font-family:var(--serif);font-size:.85em;color:var(--text);letter-spacing:2px;cursor:pointer;
  background:var(--card);border:1px solid var(--purple);border-radius:24px;padding:10px 28px;transition:.3s}
.btn:hover{background:rgba(196,160,255,.15);box-shadow:0 0 18px var(--glow)}

/* ===== 媒体相册 ===== */
.gallery-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.gtab{font-family:var(--serif);font-size:.82em;color:var(--dim);cursor:pointer;background:transparent;
  border:1px solid var(--border);border-radius:20px;padding:7px 18px;transition:.3s}
.gtab .gcnt{color:var(--mute);font-size:.8em;margin-left:4px}
.gtab.active{color:var(--text);border-color:var(--purple);background:rgba(196,160,255,.1)}
.gallery-grid{position:relative;min-height:600px}

/* ===== 3D 媒体场景 ===== */
.scene3d{position:relative;width:100%;height:600px;perspective:1600px;overflow:hidden;cursor:grab;border-radius:16px;background:radial-gradient(circle at 50% 50%,rgba(50,35,95,.32),transparent 70%)}
.scene3d.grabbing{cursor:grabbing}
.world3d{position:absolute;left:50%;top:50%;width:0;height:0;transform-style:preserve-3d;will-change:transform}
/* 照片：空心圆柱 */
.photo3d{position:absolute;left:0;top:0;width:78px;height:98px;margin:-49px 0 0 -39px;transform-style:preserve-3d;animation:photoBreathe 6s ease-in-out infinite}
.photo3d img{width:100%;height:100%;object-fit:cover;border-radius:8px;border:1px solid rgba(196,160,255,.5);box-shadow:0 0 14px rgba(196,160,255,.4);animation:photoFloat 7s ease-in-out infinite;backface-visibility:hidden}
@keyframes photoBreathe{0%,100%{opacity:.28}50%{opacity:.95}}
@keyframes photoFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
/* 视频：螺旋 */
.video3d{position:absolute;left:0;top:0;width:120px;height:150px;margin:-75px 0 0 -60px;transform-style:preserve-3d}
.video3d img{width:100%;height:100%;object-fit:cover;border-radius:10px;border:1px solid rgba(255,158,199,.55);box-shadow:0 0 18px rgba(255,158,199,.4);backface-visibility:hidden;transition:box-shadow .3s}
.video3d:hover img{box-shadow:0 0 32px rgba(255,158,199,.75)}
.video3d .vbadge{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:1.7em;color:#fff;text-shadow:0 0 14px rgba(255,158,199,.9);pointer-events:none}
/* 语音：星云光点 */
.voicedot{position:absolute;left:0;top:0;transform-style:preserve-3d;cursor:pointer}
.dot-core{width:100%;height:100%;border-radius:50%;background:radial-gradient(circle,#fff,#c4a0ff);box-shadow:0 0 10px #c4a0ff,0 0 22px rgba(196,160,255,.5);animation:dotPulse 3s ease-in-out infinite;backface-visibility:hidden}
.voicedot.playing .dot-core{background:radial-gradient(circle,#fff,#ff9ec7);box-shadow:0 0 18px #ff9ec7,0 0 40px rgba(255,158,199,.75);animation:dotPlay .5s ease-in-out infinite}
@keyframes dotPulse{0%,100%{transform:scale(.8);opacity:.45}50%{transform:scale(1.15);opacity:1}}
@keyframes dotPlay{0%,100%{transform:scale(1)}50%{transform:scale(1.45)}}
@media(max-width:720px){.scene3d{height:460px}#gallery-grid{min-height:460px}.photo3d{width:60px;height:76px;margin:-38px 0 0 -30px}.video3d{width:90px;height:112px;margin:-56px 0 0 -45px}}
.gimg{position:relative;aspect-ratio:1;border-radius:10px;overflow:hidden;cursor:pointer;background:var(--card);border:1px solid var(--border)}
.gimg img{width:100%;height:100%;object-fit:cover;transition:.4s}
.gimg:hover img{transform:scale(1.08)}
.gimg::after{content:'';position:absolute;inset:0;background:linear-gradient(transparent 60%,rgba(0,0,0,.4));opacity:0;transition:.3s}
.gimg:hover::after{opacity:1}
.gvoice{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  aspect-ratio:1;border-radius:10px;background:var(--card);border:1px solid var(--border);cursor:pointer;transition:.3s;padding:12px;text-align:center}
.gvoice:hover{border-color:var(--purple);background:var(--card-hover)}
.gvoice .vplay{width:38px;height:38px;border-radius:50%;background:rgba(196,160,255,.18);display:flex;align-items:center;justify-content:center;color:var(--purple);font-size:.9em}
.gvoice.playing .vplay{background:var(--purple);color:#fff}
.gvoice .vwave{display:flex;gap:2px;align-items:flex-end;height:18px}
.gvoice .vwave i{width:2px;background:var(--purple);border-radius:1px;height:6px}
.gvoice.playing .vwave i{animation:wave 1s ease-in-out infinite}
.gvoice .vwave i:nth-child(2){animation-delay:.15s}.gvoice .vwave i:nth-child(3){animation-delay:.3s}
.gvoice .vwave i:nth-child(4){animation-delay:.45s}.gvoice .vwave i:nth-child(5){animation-delay:.6s}
.gvoice .vdur{font-family:var(--num);font-size:.8em;color:var(--dim)}
.gvoice .vwho{font-size:.62em;color:var(--mute)}

/* ===== 彩蛋 ===== */
.secret-section{padding:120px 0}
.secret-box{text-align:center;max-width:440px;margin:0 auto;background:var(--card);border:1px solid var(--border);
  border-radius:20px;padding:40px 28px;backdrop-filter:blur(10px)}
.secret-icon{font-size:2.4em;animation:float 4s ease-in-out infinite}
.secret-hint{color:var(--dim);font-size:.85em;margin:14px 0 22px;letter-spacing:1px}
.secret-input{width:100%;background:rgba(0,0,0,.25);border:1px solid var(--border);border-radius:24px;
  padding:12px 20px;color:var(--text);font-family:var(--serif);font-size:.95em;text-align:center;outline:none;transition:.3s}
.secret-input:focus{border-color:var(--purple);box-shadow:0 0 16px var(--glow)}
.secret-msg{margin-top:14px;min-height:1.2em;font-size:.8em;color:var(--pink)}

/* ===== Footer ===== */
#footer{text-align:center;padding:80px 20px 60px}
.days-live{font-family:var(--num);font-size:2em;color:var(--purple);text-shadow:0 0 20px var(--glow)}
.footer-love{margin-top:14px;color:var(--dim);font-size:.82em;letter-spacing:3px}

/* ===== 音乐控件 ===== */
.music-ctl{position:fixed;right:22px;bottom:22px;z-index:60;width:48px;height:48px;border-radius:50%;
  background:rgba(10,8,25,.6);backdrop-filter:blur(10px);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;cursor:pointer;transition:.3s}
.music-ctl:hover{border-color:var(--purple);box-shadow:0 0 18px var(--glow)}
.music-icon{font-size:1.2em;color:var(--purple)}
.music-rings{position:absolute;inset:0;border-radius:50%;pointer-events:none}
.music-rings span{position:absolute;inset:0;border-radius:50%;border:1px solid var(--purple);opacity:0}
.music-ctl.playing .music-rings span{animation:ring 2.2s ease-out infinite}
.music-ctl.playing .music-rings span:nth-child(2){animation-delay:.7s}
.music-ctl.playing .music-rings span:nth-child(3){animation-delay:1.4s}

/* ===== 灯箱 ===== */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(3,2,12,.92);backdrop-filter:blur(6px);
  display:none;align-items:center;justify-content:center;padding:30px}
.lightbox.show{display:flex}
.lb-inner{position:relative;max-width:92vw;max-height:88vh}
.lb-inner img,.lb-inner video{max-width:92vw;max-height:88vh;border-radius:8px;box-shadow:0 0 60px var(--glow)}
.lb-close{position:absolute;top:-14px;right:-14px;width:36px;height:36px;border-radius:50%;background:var(--card);
  border:1px solid var(--border);color:var(--text);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:.9em}
.lb-close:hover{background:var(--purple);color:#fff}

/* ===== 告白浮层 ===== */
.letter-overlay{position:fixed;inset:0;z-index:95;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle,rgba(20,12,50,.85),rgba(3,2,12,.96));opacity:0;pointer-events:none;transition:opacity .8s;padding:30px}
.letter-overlay.show{opacity:1;pointer-events:auto}
.letter-text{max-width:560px;text-align:center;color:var(--text);font-size:1.05em;line-height:2.4;
  font-family:var(--brush),var(--serif);letter-spacing:2px;white-space:pre-wrap;text-shadow:0 0 20px var(--glow)}
.letter-text::after{content:'▌';color:var(--pink);animation:blink 1s step-end infinite}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:24px;bottom:80px;z-index:55;width:42px;height:42px;border-radius:50%;
  background:rgba(10,8,25,.6);backdrop-filter:blur(10px);border:1px solid var(--border);color:var(--purple);
  font-size:1.1em;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;transform:translateY(10px)}
.back-top.show{opacity:1;pointer-events:auto;transform:none}
.back-top:hover{border-color:var(--purple);box-shadow:0 0 16px var(--glow)}

/* ===== 动画 ===== */
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}
@keyframes pulse{0%,100%{transform:translateX(-50%) scale(1);opacity:1}50%{transform:translateX(-50%) scale(1.25);opacity:.7}}
@keyframes blink{0%,50%{opacity:1}51%,100%{opacity:0}}
@keyframes wave{0%,100%{height:5px}50%{height:18px}}
@keyframes ring{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.8);opacity:0}}

/* ===== 响应式 ===== */
@media(max-width:720px){
  .nav-links a{padding:5px 8px;font-size:.7em}
  .hero-title{font-size:2.4em;letter-spacing:8px}
  .sec-head h2{font-size:1.6em}
  .quotes-wall{column-count:1}
  .gallery-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}
  .stat-num{font-size:2.1em}
  .typewriter{font-size:.86em}
}