/* LoveSite 恋爱小站 —— 全局样式（清新恋爱风 + 响应式 + 暗色模式） */
:root{
  --pink:#ff6f9f; --pink-deep:#e05a8a; --pink-soft:#ffe3ee;
  --blue:#6fb7ff; --bg:#fff5f8; --card:#ffffff; --text:#4a4a4a; --muted:#9a9a9a;
  --border:#f0dce4; --shadow:0 8px 28px rgba(255,150,180,.16);
  --radius:16px; --nav-h:64px;
}
html[data-theme=dark]{
  --pink:#ff8ab0; --pink-deep:#ff6f9f; --pink-soft:#3a2430;
  --bg:#0f172a; --card:#1b2438; --text:#e6e6e6; --muted:#8d97a8;
  --border:#2a3350; --shadow:0 8px 28px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"MiSans","Microsoft YaHei",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;transition:background .3s,color .3s}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1080px;margin:0 auto;padding:0 18px}

/* 顶栏 */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:50;display:flex;align-items:center;background:color-mix(in srgb,var(--card) 88%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);transition:background .3s}
.nav .container{display:flex;align-items:center;gap:22px;width:100%}
.brand{font-weight:800;font-size:19px;color:var(--pink-deep);display:flex;align-items:center;gap:8px}
.brand .heart{animation:pulse 1.4s infinite}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{padding:8px 13px;border-radius:10px;font-size:14px;color:var(--muted);transition:.2s;white-space:nowrap}
.nav-links a:hover,.nav-links a.on{color:var(--pink-deep);background:var(--pink-soft)}
.nav-icon{width:40px;height:40px;border:0;background:var(--pink-soft);border-radius:11px;color:var(--pink-deep);font-size:17px;cursor:pointer;display:grid;place-items:center;transition:.2s}
.nav-icon:hover{transform:translateY(-1px)}
.hamburger{display:none}

/* 移动端抽屉 */
.drawer{position:fixed;top:0;left:0;bottom:0;width:78%;max-width:300px;background:var(--card);z-index:60;transform:translateX(-102%);transition:.28s;padding:70px 18px 24px;box-shadow:var(--shadow);overflow-y:auto}
.drawer.open{transform:none}
.drawer a{display:block;padding:12px 14px;border-radius:11px;color:var(--text);font-size:15px;margin-bottom:2px}
.drawer a:hover,.drawer a.on{background:var(--pink-soft);color:var(--pink-deep)}
.mask{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:55;opacity:0;pointer-events:none;transition:.28s}
.mask.open{opacity:1;pointer-events:auto}

/* 页脚 */
.footer{margin-top:56px;padding:30px 0 42px;border-top:1px solid var(--border);color:var(--muted);text-align:center;font-size:13px}

/* 页面头 */
.page-head{text-align:center;padding:46px 0 6px;margin-top:var(--nav-h)}
.page-head h2{font-size:26px;color:var(--pink-deep)}
.page-head p{color:var(--muted);font-size:14px;margin-top:6px}

/* 卡片 */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin-bottom:20px;transition:background .3s}
.card h3{margin-bottom:12px;font-size:17px;color:var(--pink-deep);display:flex;align-items:center;gap:8px}

/* 首页 hero */
.hero{position:relative;min-height:360px;border-radius:0 0 30px 30px;overflow:hidden;display:flex;align-items:center;justify-content:center;margin-top:var(--nav-h);background:linear-gradient(135deg,var(--pink-soft),var(--blue))}
.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center}
.hero .bg::after{content:"";position:absolute;inset:0;background:rgba(255,255,255,.18);backdrop-filter:blur(2px)}
html[data-theme=dark] .hero .bg::after{background:rgba(0,0,0,.25)}
.hero-inner{position:relative;z-index:2;text-align:center;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.25);padding:40px 20px;width:100%}
.hero-avatars{display:flex;align-items:center;justify-content:center;gap:20px;margin-bottom:16px}
.hero-avatars .avatar{width:96px;height:96px;border-radius:50%;border:3px solid #fff;object-fit:cover;box-shadow:0 6px 18px rgba(0,0,0,.22)}
.hero-heart{font-size:34px;animation:pulse 1.4s infinite}
.hero-names{font-size:26px;font-weight:800;letter-spacing:2px}
.hero-days{margin-top:14px;font-size:15px}
.hero-days b{font-size:30px;margin:0 6px}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.18)}}

/* 轮播 */
.carousel{position:relative;overflow:hidden;border-radius:var(--radius);aspect-ratio:16/7;margin-bottom:20px}
.carousel .slides{display:flex;height:100%;transition:transform .5s}
.carousel .slide{min-width:100%;background-size:cover;background-position:center;height:100%}
.carousel .dots{position:absolute;bottom:12px;left:0;right:0;display:flex;justify-content:center;gap:6px}
.carousel .dots i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.6);cursor:pointer;transition:.2s}
.carousel .dots i.on{background:#fff;transform:scale(1.3)}

/* 倒计时卡片行 */
.days-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-bottom:20px}
.days-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;text-align:center;transition:background .3s}
.days-card .num{font-size:34px;font-weight:800;color:var(--pink-deep);line-height:1.2}
.days-card .lbl{color:var(--muted);font-size:13px;margin-top:6px}

/* 两列 */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:860px){.cols{grid-template-columns:1fr}}

/* 点滴 */
.moment{border-left:3px solid var(--pink);padding-left:18px;margin-bottom:18px;position:relative}
.moment .date{color:var(--muted);font-size:12px;display:flex;align-items:center;gap:6px;margin-bottom:6px}
.moment .content{font-size:14px;white-space:pre-wrap;word-break:break-word}
.moment .content a{color:var(--pink-deep)}
.moment .music{display:inline-flex;align-items:center;gap:8px;background:var(--pink-soft);color:var(--pink-deep);padding:6px 12px;border-radius:20px;font-size:12px;margin-top:8px;cursor:pointer}
.moment .loc{font-size:12px;color:var(--muted)}

/* 相册 */
.album-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px}
.album-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .25s;cursor:pointer}
.album-card:hover{transform:translateY(-4px)}
.album-cover{position:relative;aspect-ratio:4/3;overflow:hidden}
.album-cover .cover{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.album-card:hover .album-cover .cover{transform:scale(1.06)}
.album-cover .grid9{display:grid;grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr 1fr;height:100%;gap:2px}
.album-cover .grid9 img{width:100%;height:100%;object-fit:cover}
.album-body{padding:14px 16px}
.album-body h4{font-size:15px}
.album-body p{font-size:12px;color:var(--muted);margin-top:4px}

/* 瀑布流 */
.waterfall{columns:3 220px;column-gap:16px}
@media(max-width:860px){.waterfall{columns:2 150px}}
.wf-item{break-inside:avoid;margin-bottom:16px;border-radius:14px;overflow:hidden;background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow)}
.wf-item img,.wf-item video{width:100%;display:block;cursor:zoom-in}
.wf-item video{cursor:pointer}
.wf-item .cap{padding:8px 12px;font-size:12px;color:var(--muted)}

/* 事件时间线 */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:7px;top:4px;bottom:4px;width:2px;background:var(--pink-soft)}
.tl-item{position:relative;margin-bottom:20px}
.tl-item::before{content:"";position:absolute;left:-24px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--pink);border:2px solid var(--card)}
.tl-date{font-size:12px;color:var(--muted)}
.tl-title{font-weight:700;font-size:15px;color:var(--pink-deep)}
.tl-content{font-size:14px;color:var(--text);margin-top:6px;white-space:pre-wrap}
.tl-tags{margin-top:8px;display:flex;gap:8px;flex-wrap:wrap}
.tag{font-size:12px;padding:3px 10px;border-radius:20px;background:var(--pink-soft);color:var(--pink-deep)}
.tag.done{background:#e8f6ef;color:#2ea366}
.tag.todo{background:#fff2e8;color:#e08a3c}
.tl-imgs{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px;margin-top:10px}
.tl-imgs img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:10px;cursor:zoom-in}

/* 筛选条 */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:20px}
.filter-bar .seg{display:flex;background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden}
.filter-bar .seg button{border:0;background:none;padding:8px 16px;font-size:13px;color:var(--muted);cursor:pointer}
.filter-bar .seg button.on{background:var(--pink);color:#fff}
.filter-bar input[type=search]{border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:20px;padding:8px 15px;outline:none;font-size:13px;min-width:160px}

/* 清单 */
.checklist-item{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid var(--border);border-radius:13px;margin-bottom:10px;background:var(--card);cursor:pointer;transition:.2s}
.checklist-item:hover{border-color:var(--pink)}
.checklist-item .ck{width:22px;height:22px;border-radius:6px;border:2px solid var(--pink);flex:none;display:grid;place-items:center;color:#fff;font-size:13px;transition:.2s}
.checklist-item.done .ck{background:var(--pink)}
.checklist-item .ck::after{content:"";width:8px;height:4px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg) translateY(-1px)}
.checklist-item.done .title{text-decoration:line-through;color:var(--muted)}
.checklist-item .title{flex:1}

/* 留言 */
.msg-card{background:var(--card);border:1px solid var(--border);border-radius:13px;padding:14px 16px;margin-bottom:12px;box-shadow:var(--shadow)}
.msg-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.msg-avatar{width:38px;height:38px;border-radius:50%;object-fit:cover;background:var(--pink-soft);display:grid;place-items:center;color:var(--pink-deep);font-weight:700}
.msg-name{font-size:14px;font-weight:600}
.msg-meta{font-size:11px;color:var(--muted)}
.msg-content{font-size:14px;white-space:pre-wrap;word-break:break-word}
.msg-emoji{font-size:20px}
.composer{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.composer input,.composer textarea{width:100%;border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:10px;padding:10px 12px;margin-bottom:10px;font-size:14px;outline:none;resize:vertical}
.composer textarea{min-height:90px}
.composer .row{display:flex;gap:10px}
.composer .row>*{flex:1}
.composer .tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.emoji-btn{font-size:20px;cursor:pointer;padding:4px;border-radius:8px}
.emoji-btn:hover{background:var(--pink-soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;background:linear-gradient(90deg,var(--pink),var(--pink-deep));color:#fff;padding:10px 22px;border-radius:12px;font-size:14px;cursor:pointer;font-weight:600}
.btn:hover{opacity:.92}
.btn.ghost{background:var(--pink-soft);color:var(--pink-deep)}
.msg-tip{font-size:12px;color:var(--muted);text-align:center;margin-top:8px}

/* 关于页 */
.about-text{font-size:15px;white-space:pre-wrap}
.about-text a{color:var(--pink-deep)}

/* 空态 / 提示 */
.empty{text-align:center;color:var(--muted);padding:40px 0;font-size:14px}
.notice{background:var(--pink-soft);color:var(--pink-deep);border-radius:12px;padding:14px;text-align:center;font-size:14px;margin-bottom:16px}
#toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(30px);background:var(--text);color:var(--bg);padding:11px 22px;border-radius:24px;font-size:14px;opacity:0;pointer-events:none;transition:.3s;z-index:99}
#toast.show{opacity:1;transform:translateX(-50%)}
.toast-ok{background:#2ea366!important}
.toast-err{background:#e05a5a!important}

/* 登录/密码页 */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,var(--pink-soft),var(--blue))}
.auth-card{background:var(--card);border-radius:20px;box-shadow:var(--shadow);padding:34px;width:100%;max-width:400px}
.auth-card h2{text-align:center;color:var(--pink-deep);margin-bottom:22px}
.auth-card input{width:100%;border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:10px;padding:12px;margin-bottom:14px;font-size:14px;outline:none}
.auth-card .btn{width:100%}

/* 灯箱 */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:100;display:none;align-items:center;justify-content:center;padding:20px;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img,.lightbox video{max-width:96%;max-height:92%;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.lightbox .close{position:absolute;top:18px;right:22px;color:#fff;font-size:32px;cursor:pointer;line-height:1}

/* 相册详情返回 */
.back{display:inline-flex;align-items:center;gap:6px;color:var(--pink-deep);font-size:14px;margin-bottom:16px;font-weight:600}