/* ============ 贺卡系统 通用样式 ============ */
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:#f7f0f2;color:#4a3b3d;overflow-x:hidden}
img{max-width:100%;display:block}

/* ---------- 开合封面 ---------- */
.cover-wrap{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,var(--theme) 0%,#fff 300%);overflow:hidden}
#petalCanvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.envelope{position:relative;width:min(88vw,360px);height:min(120vw,500px);perspective:1200px;cursor:pointer}
.env-front{position:absolute;inset:0;border-radius:10px;background:#fff;box-shadow:0 20px 50px rgba(0,0,0,.18)}
.env-flap{position:absolute;top:0;left:0;right:0;height:50%;transform-origin:top;transform:rotateX(0);background:linear-gradient(180deg,var(--theme),#fff);border-radius:10px 10px 0 0;transition:transform .9s ease;z-index:4;backface-visibility:hidden}
.env-seal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:74px;height:74px;border-radius:50%;background:var(--theme);display:flex;align-items:center;justify-content:center;font-size:34px;color:#fff;box-shadow:0 4px 14px rgba(0,0,0,.25);z-index:6;transition:.5s}
.env-seal img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.env-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px;z-index:3}
.et-top{font-size:13px;letter-spacing:4px;color:var(--theme);margin-bottom:14px;font-weight:600}
.et-main{font-size:30px;font-weight:bold;color:#fff;text-shadow:0 3px 14px rgba(0,0,0,.25);line-height:1.4}
.et-sub{font-size:16px;color:#fff;margin-top:10px;opacity:.95}
.open-btn{margin-top:34px;padding:13px 30px;border:none;border-radius:50px;background:#fff;color:var(--theme);font-size:16px;font-weight:bold;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.18)}
.et-hint{position:absolute;bottom:26px;color:rgba(255,255,255,.75);font-size:12px;animation:blink 1.6s infinite}
@keyframes blink{50%{opacity:.3}}

/* ===== 开机特效 ===== */
.cover-wrap{background:linear-gradient(160deg,var(--theme) 0%,#fff 300%);background-size:300% 300%;animation:bgFlow 8s ease-in-out infinite}
@keyframes bgFlow{0%,100%{background-position:0% 0%}50%{background-position:100% 100%}}
.envelope{animation:popIn .9s cubic-bezier(.18,.89,.32,1.28) .15s both}
@keyframes popIn{0%{transform:scale(.5) translateY(40px);opacity:0}60%{transform:scale(1.06);opacity:1}100%{transform:scale(1)}}
.env-glow{position:absolute;inset:-14%;border-radius:20px;background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.5),transparent 70%);filter:blur(20px);animation:glowPulse 2.4s ease-in-out infinite;z-index:0}
@keyframes glowPulse{0%,100%{opacity:.5;transform:scale(.95)}50%{opacity:1;transform:scale(1.05)}}
.open-btn{position:relative;overflow:hidden;animation:btnPulse 2s ease-in-out infinite}
@keyframes btnPulse{0%,100%{box-shadow:0 0 0 0 rgba(255,255,255,.6)}50%{box-shadow:0 0 0 12px rgba(255,255,255,0)}}
.et-top{animation:fadeUp .8s .5s both}
.et-main{animation:fadeUp .9s .65s both}
.et-sub{animation:fadeUp .9s .8s both}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.env-seal{animation:sealSpin 1.2s .3s ease-out both}
@keyframes sealSpin{from{opacity:0;transform:translate(-50%,-50%) rotate(-180deg) scale(.3)}to{opacity:1;transform:translate(-50%,-50%) rotate(0) scale(1)}}
/* 开启后内容逐段入场 */
.card-body .sec{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.card-body.show .sec:nth-child(1){opacity:1;transform:none;transition-delay:.1s}
.card-body.show .sec:nth-child(2){opacity:1;transform:none;transition-delay:.25s}
.card-body.show .sec:nth-child(3){opacity:1;transform:none;transition-delay:.4s}
.card-body.show .sec:nth-child(4){opacity:1;transform:none;transition-delay:.55s}
.card-body.show .sec:nth-child(5){opacity:1;transform:none;transition-delay:.7s}
.card-body.show .sec:nth-child(6){opacity:1;transform:none;transition-delay:.85s}
.card-body.show .sec:nth-child(7){opacity:1;transform:none;transition-delay:1s}
.card-body.show .hero-sec{animation:fadeUp .8s .1s both}


/* 开合动画状态 */
body.opened .env-flap{transform:rotateX(-150deg)}
body.opened .env-seal{opacity:0;transform:translate(-50%,-120%) scale(.4)}
body.opened .cover-wrap{animation:coverUp .8s .5s forwards}
@keyframes coverUp{to{opacity:0;visibility:hidden;pointer-events:none}}

/* 其他开合风格 */
body[data-open="flower"] .env-seal{border-radius:0;transform:translate(-50%,-50%) rotate(45deg)}
body[data-open="flower"].opened .env-seal{transform:translate(-50%,-50%) rotate(45deg) scale(0);opacity:0}
body[data-open="light"] .env-flap{background:radial-gradient(circle at 50% 20%,var(--theme),#fff)}
body[data-open="light"].opened .env-text{animation:lightUp 1.2s .3s forwards}
@keyframes lightUp{0%{filter:brightness(2);opacity:1}100%{filter:brightness(1)}}

/* ---------- 卡片内容 ---------- */
.card-body{position:relative;z-index:10;max-width:520px;margin:0 auto;background:#fffefc;transition:opacity .8s}
.card-body.show{opacity:1!important}

.hero-sec{padding:70px 24px 60px;text-align:center;color:#5a4446}
.hero-title{font-size:30px;font-weight:bold;letter-spacing:3px}
.hero-host{margin-top:14px;font-size:17px;color:#7a6163}
.hero-arrow{margin-top:30px;font-size:14px;animation:blink 1.4s infinite;opacity:.6}

.sec{padding:30px 24px;border-top:1px dashed #ecd9dc}
.sec-title{font-size:18px;font-weight:bold;text-align:center;color:#5a4446;margin-bottom:18px;letter-spacing:2px}
.invite-text{line-height:2;font-size:15px;color:#5d4b4d;text-align:center;white-space:pre-wrap}

.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.info-item{background:#fdf4f5;border:1px solid #f4dfe2;border-radius:12px;padding:16px 12px;text-align:center}
.ii-icon{font-size:24px}
.ii-label{font-size:12px;color:#b28a8e;margin-top:6px}
.ii-val{font-size:14px;font-weight:bold;color:#5a4446;margin-top:4px;word-break:break-all}
.map-btn{display:block;margin:18px auto 0;width:max-content;padding:12px 30px;background:var(--theme);color:#fff;border-radius:50px;text-decoration:none;font-size:15px;box-shadow:0 6px 16px rgba(0,0,0,.15)}

/* 倒计时 */
.countdown{display:flex;align-items:center;justify-content:center;gap:8px}
.cd-item{background:var(--theme);color:#fff;border-radius:12px;padding:14px 12px;min-width:66px;text-align:center;box-shadow:0 6px 16px rgba(0,0,0,.12)}
.cd-num{font-size:28px;font-weight:bold}
.cd-label{font-size:12px;opacity:.85;margin-top:4px}
.cd-colon{font-size:24px;color:#b28a8e;font-weight:bold}

/* 流程时间线 */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:9px;top:4px;bottom:4px;width:2px;background:var(--theme)}
.tl-item{position:relative;padding:0 0 20px 14px}
.tl-dot{position:absolute;left:-26px;top:4px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--theme)}
.tl-time{font-size:13px;color:var(--theme);font-weight:bold}
.tl-content{font-size:15px;color:#5d4b4d;margin-top:4px}

/* 相册 */
.gallery{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.gal-item{border-radius:10px;overflow:hidden;aspect-ratio:1;background:#f4e8ea}
.gal-item img{width:100%;height:100%;object-fit:cover;transition:.4s}
.gal-item:hover img{transform:scale(1.08)}

/* 留言 */
.msg-form,.rsvp-form{background:#fdf4f5;border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:10px}
input[type=text],textarea{width:100%;padding:12px 14px;border:1px solid #ecd9dc;border-radius:10px;font-size:14px;outline:none;background:#fff;font-family:inherit}
input:focus,textarea:focus{border-color:var(--theme)}
.msg-btn,.rsvp-submit{padding:13px;border:none;border-radius:10px;background:var(--theme);color:#fff;font-size:15px;font-weight:bold;cursor:pointer}
.msg-list{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.msg-item{background:#fdf4f5;border-radius:12px;padding:14px;border-left:4px solid var(--theme)}
.msg-item .n{font-size:13px;color:var(--theme);font-weight:bold}
.msg-item .c{font-size:14px;color:#5d4b4d;margin-top:6px;line-height:1.6}
.msg-item .t{font-size:11px;color:#b9a0a3;margin-top:6px}

/* 回执 */
.rsvp-attend{display:flex;gap:10px}
.attend-btn{flex:1;padding:13px;border:2px solid #e7c9ce;background:#fff;border-radius:10px;font-size:14px;cursor:pointer;color:#8a6c6f}
.attend-btn.on{border-color:var(--theme);background:var(--theme);color:#fff}
.rsvp-count{display:flex;align-items:center;justify-content:space-between;padding:10px 4px}
.rsvp-count label{font-size:13px;color:#8a6c6f}
.stepper{display:flex;align-items:center;gap:14px}
.stepper button{width:34px;height:34px;border-radius:50%;border:none;background:var(--theme);color:#fff;font-size:20px;cursor:pointer}
.stepper span{font-size:20px;font-weight:bold;color:#5a4446;min-width:24px;text-align:center}

/* 底部 */
.footer{text-align:center;padding:40px 20px 90px;background:#fdf4f5;color:#b28a8e;font-size:13px;line-height:2.2}
.footer-love{font-size:15px;color:#c98b97}
.footer-sign{margin-top:6px;font-size:14px}
.footer-icp a{color:#c5a4a8;text-decoration:none}
.footer-by{margin-top:10px;color:#d2b6b9;font-size:12px}

/* 浮动工具条 */
.float-bar{position:fixed;right:14px;bottom:30px;z-index:40;display:flex;flex-direction:column;gap:10px}
.f-btn{width:46px;height:46px;border-radius:50%;border:none;background:#fff;box-shadow:0 6px 16px rgba(0,0,0,.18);font-size:20px;cursor:pointer;color:#5a4446;display:flex;align-items:center;justify-content:center}
.f-btn span{font-size:12px;margin-left:2px}
.f-btn.playing{animation:spin 3s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* 分享弹窗 */
.modal{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;padding:24px}
.modal.show{display:flex}
.modal-box{background:#fff;border-radius:16px;padding:24px;width:100%;max-width:360px;text-align:center}
.modal-title{font-size:18px;font-weight:bold;color:#5a4446;margin-bottom:16px}
.share-actions{display:flex;flex-direction:column;gap:10px}
.share-btn{padding:13px;border:1px solid #ecd9dc;border-radius:10px;background:#fdf4f5;font-size:15px;cursor:pointer;color:#5a4446}
.share-link{margin-top:14px;font-size:12px;color:#999;background:#f7f2f3;padding:10px;border-radius:8px;word-break:break-all}
.qr-box{margin-top:14px}
.qr-box svg{width:200px;height:200px;margin:0 auto;display:block}
.qr-box p{font-size:12px;color:#999;margin-top:8px}
.poster-box{margin-top:14px}
.poster-box p{font-size:12px;color:#999;margin-top:10px}
.poster-box .share-btn{margin-top:10px;width:100%}
.modal-close{margin-top:16px;padding:10px 26px;border:none;border-radius:50px;background:#f0e2e5;color:#8a6c6f;font-size:14px;cursor:pointer}

/* toast */
.toast{position:fixed;left:50%;bottom:100px;transform:translateX(-50%) translateY(20px);background:rgba(0,0,0,.78);color:#fff;padding:12px 22px;border-radius:50px;font-size:14px;z-index:200;opacity:0;transition:.3s;pointer-events:none;white-space:nowrap}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}