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

body {
    font-family: "Microsoft YaHei", sans-serif;
    overflow-x: hidden;
}

.hero {
    width: 100%;
    min-height: 100vh;
    min-height: 100svh;

    background: linear-gradient(
        180deg,
        #20183f,
        #59467d,
        #d6a4c8
    );

    display: flex;
    justify-content: center;
    align-items: center;

    text-align: center;
    position: relative;
}

.content {
    position: relative;
    z-index: 2;
    padding: 24px;

    animation: fadeIn 3s ease;
}

h1 {
    color: #fff4fa;
    font-size: clamp(28px, 5vw, 52px);
    margin-bottom: 25px;
}

.subtitle {
    color: #fff0f7;
    font-size: 16px;
    line-height: 2;
    margin-bottom: 35px;
}

button {
    padding: 15px 30px;
    border: none;
    border-radius: 30px;

    background: #fff0f6;
    color: #9d658d;

    font-size: 16px;
    cursor: pointer;

    box-shadow: 0 5px 20px #ffb6d580;

    transition: 0.3s;
}

button:hover {
    transform: scale(1.08);
    background: #ffd6eb;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(25px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}
body {
    background-color: pink;
}
/* 星空背景 */

.stars {
    position: absolute;
    inset: 0;

    background-image:
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(2px 2px at 70% 20%, white, transparent),
        radial-gradient(3px 3px at 40% 70%, white, transparent),
        radial-gradient(2px 2px at 80% 80%, white, transparent),
        radial-gradient(2px 2px at 10% 90%, white, transparent);

    background-size: 300px 300px;

    animation: twinkle 4s infinite alternate;

    pointer-events: none;
}

@keyframes twinkle {
    from {
        opacity: 0.3;
    }

    to {
        opacity: 1;
    }
}

/* 漂浮爱心容器 */

.floating-hearts {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

/* 爱心基础样式 */

.floating-hearts span {
    position: absolute;
    bottom: -50px;

    color: #ffe0f0;
    font-size: 35px;

    text-shadow: 0 0 12px #ffb6d9;

    animation: floatHeart 8s linear infinite;
}

/* 五颗爱心的位置 */

.floating-hearts span:nth-child(1) {
    left: 10%;
    animation-delay: -1s;
}

.floating-hearts span:nth-child(2) {
    left: 30%;
    animation-delay: -3s;
}

.floating-hearts span:nth-child(3) {
    left: 50%;
    animation-delay: -5s;
}

.floating-hearts span:nth-child(4) {
    left: 70%;
    animation-delay: -7s;
}

.floating-hearts span:nth-child(5) {
    left: 90%;
    animation-delay: -2s;
}

/* 爱心上升动画 */

@keyframes floatHeart {

    0% {
        transform: translateY(0);
        opacity: 0;
    }

    15% {
        opacity: 1;
    }

    85% {
        opacity: 1;
    }

    100% {
        transform: translateY(-110vh);
        opacity: 0;
    }
}
/* 第二幕：烟花与城堡 */
.story-screen[hidden] { display: none; }
.story-screen { min-height: 100vh; min-height: 100svh; padding: 64px 18px; background: linear-gradient(180deg,#20183f,#493b72 65%,#c995bd); color: #fff4fa; text-align: center; display: flex; align-items: center; justify-content: center; }
.story-inner { width: min(920px,100%); }
.story-inner h2 { font-size: clamp(26px,5vw,46px); margin: 14px 0 24px; }
.eyebrow { letter-spacing: .12em; color: #f8dce9; font-size: 14px; }
.story-inner video { display: block; width: 100%; aspect-ratio: 16/9; background: #100d23; border-radius: 18px; box-shadow: 0 18px 55px #120d3270; }
.story-note { margin: 25px 0; font-size: 18px; letter-spacing: .08em; }
@media (prefers-reduced-motion: reduce) { *,*::before,*::after { animation-duration: .01ms !important; scroll-behavior: auto !important; } }

/* 第三、四幕：信封与翻页童话书 */
.letter-scene[hidden],.cinema-intro[hidden],.envelope-stage[hidden],.book-stage[hidden]{display:none!important}
.letter-scene{min-height:100svh;background:radial-gradient(ellipse at 50% 10%,#55466e,#211d3d 65%,#14152b);color:#fff0f6;text-align:center;padding:60px 18px;display:flex;align-items:center;justify-content:center}
.letter-scene>div{width:min(780px,100%)}
.cinema-intro{animation:fadeUp 1.5s ease both}.cinema-intro p{margin:15px 0}.cinema-date{font-size:clamp(26px,5vw,43px);letter-spacing:.1em;color:#f8d7e5}.cinema-divider{color:#efd5a6;margin:30px}.cinema-quote{font-size:clamp(17px,3vw,24px);margin:48px 0!important}
.envelope-stage h2{font-weight:400;font-size:clamp(22px,4vw,33px);margin:22px 0 45px}.envelope-stage>p:last-child{margin-top:38px;color:#ffe1ed}
.envelope{position:relative;width:min(330px,75vw);height:210px;border:0;border-radius:6px;background:linear-gradient(145deg,#f8cddd,#e9a9c1);box-shadow:0 20px 55px #08051c77;cursor:pointer;animation:floatEnvelope 3s ease-in-out infinite;display:inline-block;overflow:hidden}
.envelope:before{content:'';position:absolute;inset:0;background:linear-gradient(145deg,transparent 49%,#f3b8cf 50%) bottom left/50% 100% no-repeat,linear-gradient(215deg,transparent 49%,#f3b8cf 50%) bottom right/50% 100% no-repeat}
.envelope-flap{position:absolute;top:0;left:0;width:100%;height:66%;background:#ffdce8;clip-path:polygon(0 0,100% 0,50% 100%);filter:drop-shadow(0 3px 3px #a85c8255)}
.envelope-heart{position:absolute;top:54%;left:50%;transform:translate(-50%,-50%);font-size:39px;color:#bf648a;text-shadow:0 2px 7px #fff6}
.book-stage{animation:fadeUp .8s ease both}.book{padding:12px;background:#e9c7a5;border-radius:15px;box-shadow:10px 16px 0 #9c6c72,0 25px 65px #0a071a8c;transform:perspective(1300px) rotateY(-2deg)}
.book-page{height:min(65vh,610px);min-height:360px;overflow:auto;padding:clamp(23px,5vw,54px);border-radius:7px;background:repeating-linear-gradient(0deg,transparent,transparent 31px,#eaded766 32px),#fff9ef;color:#6b4957;text-align:left;box-shadow:inset 6px 0 18px #cbaeb070;scrollbar-color:#d3a2b4 transparent}
.page-tag{font-size:12px;letter-spacing:.19em;text-transform:uppercase;color:#b77c94}.book-page h2{font-family:Georgia,'Noto Serif SC',serif;font-size:clamp(24px,4vw,36px);line-height:1.35;margin:12px 0 27px;color:#8b5d76}.page-body{font-size:clamp(15px,2vw,17px);line-height:2.1;letter-spacing:.035em}.page-body p{margin:0 0 19px}.page-enter{animation:pageTurn .5s ease both}.book-controls{display:flex;justify-content:center;align-items:center;gap:14px;margin:28px 0 10px}.book-controls button:disabled{opacity:.4;cursor:not-allowed}.quiet-button{background:transparent!important;box-shadow:none!important;text-decoration:underline;text-underline-offset:5px}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes floatEnvelope{50%{transform:translateY(-12px)}}@keyframes pageTurn{from{opacity:.4;transform:perspective(700px) rotateY(-9deg)}to{opacity:1;transform:perspective(700px) rotateY(0)}}
@media(max-width:600px){.letter-scene{padding:36px 12px}.book{padding:7px}.book-page{height:65svh}.book-controls{gap:7px}.book-controls button{padding:10px 12px;font-size:13px}}

/* 童话书精装升级：书脊、烫金、纸张与立体翻页 */
.book-stage{max-width:820px!important}
.book{position:relative;isolation:isolate;padding:15px 17px 15px 27px;border:2px solid #d9b98f;border-left:13px solid #ad7180;border-radius:9px 17px 17px 9px;background:linear-gradient(90deg,#b9818a 0,#e7c7b5 4%,#fff0d9 7%,#e6c6a7 100%);box-shadow:3px 3px 0 #fff5e0,7px 7px 0 #d4ac93,13px 14px 0 #a46d78,0 30px 65px #08061b88;transform:perspective(1500px) rotateY(-3deg)}
.book:before{content:'✦';position:absolute;top:50%;left:-9px;transform:translateY(-50%);writing-mode:vertical-rl;color:#f7dfb4;font-size:18px;letter-spacing:13px;z-index:3}
.book-page{position:relative;transform-origin:left center;background:radial-gradient(circle at 10% 12%,#fffdf6,#fff9ec 72%,#f2e7d6),repeating-linear-gradient(0deg,transparent 0 33px,#ddc5b83b 34px);border:1px solid #e6d2bd;border-radius:3px 11px 11px 3px;box-shadow:inset 14px 0 25px #b89b9140,inset -4px 0 13px #d3bcae50;backface-visibility:hidden}
.book-page:before{content:'';position:absolute;inset:13px;pointer-events:none;border:1px solid #cfb48c75;border-radius:2px 8px 8px 2px}
.book-page:after{content:'❦';display:block;text-align:center;color:#c39d74;font-size:23px;padding:8px 0 12px}
.book-page h2{color:#8d6074;text-shadow:0 1px #fff;position:relative}
.page-tag{color:#b48a61;font-weight:700}
.book-page .page-body{position:relative;z-index:1}
.book-page .page-body p:first-child:first-letter{font-size:1.14em;color:#a47781}
.book-page.is-cover{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:radial-gradient(ellipse at 40% 20%,#ffeaf1,#f3d1d9 70%,#e8b6c7);border:5px double #d8ad88;overflow:hidden}
.book-page.is-cover:before{inset:18px;border:2px solid #c99e73;border-radius:60px 60px 9px 9px}
.book-page.is-cover .page-tag{letter-spacing:.26em;color:#a77c62}
.book-page.is-cover h2{font-family:Georgia,serif;font-style:italic;font-size:clamp(29px,5vw,48px);line-height:1.4;color:#8d5873;margin:28px 0}
.book-page.is-cover .page-body{text-align:center;font-size:16px}
.book-page.is-cover .page-body:before{content:'♡';display:block;color:#b37b8c;font-size:66px;line-height:1.3;margin-bottom:14px;text-shadow:0 3px 0 #fff7}
.book-page.is-cover:after{content:'✦  ❦  ✦';letter-spacing:9px;color:#a77b65}
.book-page.is-ending{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.book-page.is-ending .page-body{text-align:center}
.book-page.is-ending .page-body p:first-child{font-size:28px;color:#b07d90}
.book-page.turn-next{animation:turnNext .75s cubic-bezier(.22,.7,.22,1) both}
.book-page.turn-prev{animation:turnPrev .75s cubic-bezier(.22,.7,.22,1) both}
@keyframes turnNext{0%{opacity:.3;transform:perspective(1200px) rotateY(-78deg);filter:brightness(.83)}55%{opacity:1;filter:brightness(.97)}100%{transform:perspective(1200px) rotateY(0);filter:brightness(1)}}
@keyframes turnPrev{0%{opacity:.35;transform:perspective(1200px) rotateY(66deg);filter:brightness(.87)}100%{opacity:1;transform:perspective(1200px) rotateY(0);filter:brightness(1)}}
@media(max-width:600px){.book{padding:8px 8px 8px 13px;border-left-width:9px;transform:none}.book-page:before{inset:8px}.book-page{padding:24px 22px}}
@media(prefers-reduced-motion:reduce){.book-page.turn-next,.book-page.turn-prev{animation:none!important}}

/* Hidden love note and memory album */
.fairy-modal[hidden]{display:none!important}.fairy-modal{position:fixed;inset:0;z-index:9999;overflow-y:auto;padding:clamp(12px,4vw,45px);background:#120e2add;backdrop-filter:blur(9px);display:flex;align-items:flex-start;justify-content:center}
body.modal-open{overflow:hidden}.fairy-panel{position:relative;width:min(100%,720px);margin:auto;background:linear-gradient(150deg,#fffaf5,#ffeaf1);border:2px solid #e7c6b0;border-radius:23px;padding:clamp(25px,5vw,54px);box-shadow:0 25px 80px #08051b99;color:#80546a;text-align:center;overflow:hidden}
.fairy-panel h2{font:italic clamp(30px,5vw,43px) Georgia,serif;color:#9b6682;margin:12px 0 22px}.fairy-kicker{font-size:12px;letter-spacing:.15em;color:#bb8998}.modal-close{position:absolute;right:13px;top:10px;border:0;background:transparent!important;box-shadow:none!important;font-size:32px;color:#9b6682;padding:5px 12px;cursor:pointer}.secret-letter{text-align:left;line-height:2.05;font-size:15px;max-height:46vh;overflow-y:auto;padding:4px 10px}.secret-letter p{margin:0 0 14px}.secret-letter strong{color:#bb628e}.hug-ticket{margin-top:22px;border:2px dashed #d5a2b4;border-radius:14px;padding:22px 12px;background:#fff8fa;display:grid;gap:10px}.hug-ticket span{font-weight:700;font-size:19px}.hug-ticket small{font-size:13px}.hug-ticket button{justify-self:center;margin-top:8px}#hugResult{min-height:22px;font-weight:700;color:#bb648e}.hug-float{position:absolute;bottom:10%;font-size:25px;color:#f07ba6;pointer-events:none;animation:hugRise 2s ease-out forwards}@keyframes hugRise{to{transform:translateY(-320px) rotate(25deg);opacity:0}}
.album-panel{width:min(100%,1050px)}.album-hint{font-size:14px;margin:-8px 0 27px}.polaroid-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(205px,1fr));gap:25px;align-items:start}.polaroid-card{padding:0!important;background:transparent!important;border:0!important;box-shadow:none!important;min-height:290px;perspective:1000px;cursor:pointer;display:block;width:100%}.polaroid-inner{position:relative;display:block;width:100%;height:290px;transition:transform .7s;transform-style:preserve-3d}.polaroid-card.flipped .polaroid-inner{transform:rotateY(180deg)}.polaroid-face{position:absolute;inset:0;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;padding:12px 12px 18px;background:#fffefa;box-shadow:0 7px 21px #74536944;color:#78546a}.polaroid-front img,.polaroid-placeholder{width:100%;height:222px;object-fit:cover;display:block}.polaroid-placeholder{white-space:pre-line;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(135deg,#d7c9eb,#ffe2ea);font-size:24px;line-height:2;color:#956783}.polaroid-caption{font:italic 14px Georgia,serif;margin:auto 0 0;line-height:1.3}.polaroid-back{transform:rotateY(180deg);background:#fff5e8;justify-content:center;gap:19px;line-height:1.9;padding:25px}.polaroid-back strong{font-size:17px}.polaroid-back span{font-size:14px}.polaroid-back small{font-size:12px;color:#b18799}.album-footer{margin:32px 0 0;font:italic 17px Georgia,serif}.ending-extras{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:18px auto 0;position:relative;z-index:2}.ending-extras button{font-size:13px;padding:12px 15px}.book-page.is-ending{justify-content:center}.book-page.is-ending .page-body p{margin-bottom:7px}
@media(max-width:550px){.polaroid-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.polaroid-card,.polaroid-inner{height:235px;min-height:235px}.polaroid-face{padding:8px}.polaroid-front img,.polaroid-placeholder{height:175px}.polaroid-caption{font-size:11px}.polaroid-back{padding:10px;gap:8px}.polaroid-back strong{font-size:13px}.polaroid-back span{font-size:11px;line-height:1.6}.polaroid-back small{font-size:10px}.fairy-panel{padding:30px 15px}.ending-extras button{font-size:11px;padding:9px}}
@media(prefers-reduced-motion:reduce){.polaroid-inner,.hug-float{transition:none;animation:none}}

/* 固定在右上角的音乐开关 */
.music-toggle { position:fixed; top:18px; right:18px; z-index:9999; border:1px solid rgba(255,255,255,.65); background:rgba(81,50,99,.65); color:#fff; border-radius:999px; padding:10px 16px; font-size:14px; cursor:pointer; backdrop-filter:blur(12px); box-shadow:0 4px 16px rgba(30,15,55,.2); }
.music-toggle:hover { background:rgba(117,65,120,.85); }

/* The Story Goes On — cinematic finale */
.final-scene[hidden],.final-promise[hidden]{display:none!important}
.final-scene{min-height:100vh;background:#080e24;display:grid;place-items:center;padding:22px 12px;color:#fff}
.final-stage{width:min(100%,1100px);aspect-ratio:16/9;position:relative;overflow:hidden;border-radius:16px;box-shadow:0 25px 80px #020817a6;background:#09112b}
.final-stage video,.final-stage img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.final-stage img{opacity:0;transition:opacity 3.5s ease}
.final-stage img.revealed{opacity:1}
.final-shade{position:absolute;inset:0;background:linear-gradient(0deg,#050b1bd9 0%,#060e244d 52%,#030a1b1f 100%);pointer-events:none}
.final-words{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:center;text-align:center;padding:clamp(18px,4vw,50px) 14px;pointer-events:none}
.final-quote{position:absolute;bottom:18%;font-size:clamp(15px,2.5vw,28px);line-height:2.1;letter-spacing:.12em;text-shadow:0 2px 14px #000;opacity:0;transform:translateY(15px);transition:opacity 1.6s,transform 1.6s}
.final-quote.visible,.final-promise.visible{opacity:1;transform:translateY(0)}
.final-promise{opacity:0;transform:translateY(16px);transition:opacity 1.7s,transform 1.7s;pointer-events:auto;text-shadow:0 2px 14px #000}
.final-promise h2{font-size:clamp(19px,3.2vw,38px);font-weight:500;letter-spacing:.08em;margin:10px 0 14px;color:#fff5ed}
.final-promise p{margin:9px 0;color:#f6e9f4}.final-kicker{font:italic clamp(16px,2vw,24px) Georgia,serif}.final-date{font-size:clamp(11px,1.5vw,16px);letter-spacing:.06em}
.final-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:22px}
.final-actions button{border:1px solid #fce4f1a8;border-radius:30px;background:#543a69b8;color:white;padding:10px 17px;cursor:pointer;font-size:clamp(11px,1.5vw,14px)}
@media(max-width:600px){.final-scene{padding:8px}.final-stage{aspect-ratio:3/4}.final-stage video,.final-stage img{object-fit:cover}.final-quote{bottom:24%}.final-words{padding-bottom:10%}}
@media(prefers-reduced-motion:reduce){.final-stage img,.final-quote,.final-promise{transition:none}}