/* =========================================================
   焕新空间 · SpaceReborn — 样式系统
   配色：暖奶油底 + 陶土橙 + 鼠尾草绿
   ========================================================= */
:root{
  --bg:#FBF8F3;
  --surface:#FFFFFF;
  --surface-2:#F4EEE4;
  --ink:#2A2622;
  --muted:#7A7066;
  --line:#ECE3D5;
  --accent:#E2725B;       /* 陶土橙 */
  --accent-d:#C85A45;
  --sage:#7C9885;         /* 鼠尾草绿 */
  --sage-d:#5E7A66;
  --gold:#E0A458;
  --shadow:0 18px 48px rgba(60,45,35,.10);
  --shadow-sm:0 6px 18px rgba(60,45,35,.08);
  --radius:20px;
  --radius-sm:12px;
  --maxw:1180px;
  --serif:"Songti SC","STSong",Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{line-height:1.2;font-weight:800;letter-spacing:.5px}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4em;
  padding:.7rem 1.2rem;border-radius:999px;font-weight:700;font-size:.95rem;
  transition:transform .15s ease,box-shadow .2s ease,background .2s ease;white-space:nowrap;
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(226,114,91,.35)}
.btn--primary:hover{background:var(--accent-d)}
.btn--ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn--lg{padding:.95rem 1.6rem;font-size:1.02rem}
.btn--block{width:100%}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:40;background:rgba(251,248,243,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav__inner{max-width:var(--maxw);margin:0 auto;padding:.85rem 1.2rem;display:flex;align-items:center;gap:1rem}
.brand{display:flex;align-items:baseline;gap:.4rem;font-weight:800}
.brand__mark{font-size:1.4rem}
.brand__name{font-size:1.25rem;font-family:var(--serif)}
.brand__sub{font-size:.7rem;color:var(--muted);letter-spacing:2px;text-transform:uppercase}
.nav__links{display:flex;gap:1.4rem;margin-left:auto;font-size:.95rem;color:var(--muted)}
.nav__links a:hover{color:var(--accent)}
.nav .btn{margin-left:.6rem}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden}
.hero__bg{position:absolute;inset:0;background:
  radial-gradient(60% 60% at 85% 10%,rgba(226,114,91,.16),transparent 60%),
  radial-gradient(50% 50% at 10% 90%,rgba(124,152,133,.20),transparent 60%);}
.hero__inner{max-width:var(--maxw);margin:0 auto;padding:clamp(2.5rem,6vw,5rem) 1.2rem;display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center;position:relative}
.pill{display:inline-block;background:var(--surface);border:1px solid var(--line);padding:.4rem .9rem;border-radius:999px;font-size:.85rem;color:var(--muted);box-shadow:var(--shadow-sm)}
.hero__title{font-family:var(--serif);font-size:clamp(2.3rem,5.5vw,3.8rem);margin:1.1rem 0 .9rem}
.hl{color:var(--accent);position:relative;white-space:nowrap}
.hl::after{content:"";position:absolute;left:0;right:0;bottom:.12em;height:.32em;background:rgba(224,164,88,.35);z-index:-1;border-radius:4px}
.hero__lead{font-size:1.12rem;color:var(--muted);max-width:34ch}
.hero__lead strong{color:var(--ink)}
.hero__cta{display:flex;gap:.9rem;margin:1.6rem 0 1.8rem;flex-wrap:wrap}
.hero__stats{display:flex;gap:2.2rem}
.hero__stats b{display:block;font-size:1.7rem;font-family:var(--serif);color:var(--accent-d)}
.hero__stats span{font-size:.85rem;color:var(--muted)}

/* Hero 浮动卡片 */
.hero__visual{position:relative;height:420px}
.float-card{position:absolute;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:.7rem;overflow:hidden}
.float-card--1{width:200px;top:10px;left:0;transform:rotate(-4deg)}
.float-card--2{width:230px;right:0;top:60px;transform:rotate(3deg)}
.float-card--3{width:240px;left:30px;bottom:0;padding:.9rem 1rem;font-size:.9rem}
.float-card--3 b{color:var(--accent)}
.fc__tag{font-size:.72rem;color:var(--muted);margin-bottom:.4rem;font-weight:700}
.fc__tag--after{color:var(--sage-d)}
.fc__img{height:120px;border-radius:12px;background-size:cover;background-position:center}
.fc__img--before{background:#cfc4b3;background-image:url('../assets/generated/balcony-before.jpg');background-size:cover;background-position:center}
.fc__img--after{background:#d8b98f;background-image:url('../assets/generated/balcony.png');background-size:cover;background-position:center}
.fc__chips{display:flex;gap:.35rem;margin-top:.5rem;flex-wrap:wrap}
.fc__chips span{font-size:.7rem;background:var(--surface-2);padding:.2rem .55rem;border-radius:999px;color:var(--muted)}

/* ---------- 通用 section ---------- */
.section-head{max-width:var(--maxw);margin:0 auto;padding:clamp(2.5rem,5vw,4rem) 1.2rem .5rem;text-align:center}
.kicker{display:inline-block;font-size:.8rem;font-weight:800;letter-spacing:3px;text-transform:uppercase;color:var(--accent);margin-bottom:.6rem}
.kicker--light{color:var(--gold)}
.section-head h2{font-family:var(--serif);font-size:clamp(1.7rem,4vw,2.6rem)}
.section-sub{color:var(--muted);margin-top:.6rem}

/* ---------- 三步 ---------- */
.how{max-width:var(--maxw);margin:0 auto;padding:1rem 1.2rem 2rem}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-top:1.6rem}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.5rem;position:relative;box-shadow:var(--shadow-sm)}
.step__num{position:absolute;top:-14px;left:1.5rem;width:34px;height:34px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800}
.step__icon{font-size:2rem;margin:.4rem 0 .6rem}
.step h3{font-size:1.18rem;margin-bottom:.4rem}
.step p{color:var(--muted);font-size:.95rem}

/* ---------- 画廊 + 投票 ---------- */
.gallery{max-width:var(--maxw);margin:0 auto;padding:1.5rem 1.2rem 3rem}
.gallery__toolbar{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin:1.5rem 0}
.chips{display:flex;gap:.5rem;flex-wrap:wrap}
.chip{padding:.45rem 1rem;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:.88rem;color:var(--muted);transition:.15s}
.chip:hover{border-color:var(--accent)}
.chip--active{background:var(--ink);color:#fff;border-color:var(--ink)}
.sort{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--muted)}
.sort select{padding:.45rem .8rem;border-radius:10px;border:1px solid var(--line);background:var(--surface);font-family:inherit;color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card__media{height:190px;position:relative;cursor:pointer;background-size:cover;background-position:center}
.card__type{position:absolute;top:10px;left:10px;background:rgba(42,38,34,.78);color:#fff;font-size:.72rem;padding:.25rem .6rem;border-radius:999px;backdrop-filter:blur(4px)}
.card__votes-badge{position:absolute;top:10px;right:10px;background:var(--accent);color:#fff;font-size:.78rem;font-weight:800;padding:.25rem .6rem;border-radius:999px;display:flex;align-items:center;gap:.25rem}
.card__aibadge{position:absolute;bottom:10px;left:10px;background:rgba(124,152,133,.92);color:#fff;font-size:.7rem;font-weight:700;padding:.22rem .55rem;border-radius:999px;backdrop-filter:blur(4px)}
.card__body{padding:1rem 1.1rem 1.2rem;display:flex;flex-direction:column;gap:.5rem;flex:1}
.card__title{font-size:1.05rem;font-weight:800;cursor:pointer}
.card__meta{font-size:.82rem;color:var(--muted);display:flex;gap:.6rem;flex-wrap:wrap}
.card__meta b{color:var(--sage-d)}
.card__func{display:flex;gap:.35rem;flex-wrap:wrap}
.tag{font-size:.72rem;background:var(--surface-2);color:var(--muted);padding:.2rem .55rem;border-radius:999px}
.vote-btn{margin-top:auto;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.7rem;border-radius:12px;background:var(--surface-2);color:var(--ink);font-weight:800;font-size:.95rem;transition:.15s;border:1.5px solid transparent}
.vote-btn:hover{border-color:var(--accent);color:var(--accent)}
.vote-btn.voted{background:var(--accent);color:#fff}
.vote-btn.voted:hover{background:var(--accent-d);color:#fff}
.vote-bar{height:6px;border-radius:999px;background:var(--surface-2);overflow:hidden}
.vote-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--gold));border-radius:999px;transition:width .4s ease}

/* ---------- AI 说明区 ---------- */
.ai-section{background:linear-gradient(135deg,#2A2622,#3a342c);color:#f3ece2;margin-top:1rem}
.ai__inner{max-width:var(--maxw);margin:0 auto;padding:clamp(2.5rem,5vw,4rem) 1.2rem;display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center}
.ai__copy h2{font-family:var(--serif);font-size:clamp(1.7rem,4vw,2.4rem);margin:.4rem 0 1rem;color:#fff}
.ai__copy p{color:#cbbfb0;max-width:46ch}
.ai__list{list-style:none;margin:1.4rem 0;display:grid;gap:.7rem}
.ai__list li{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);padding:.7rem .9rem;border-radius:12px;font-size:.95rem}
.ai__panel{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:1.6rem}
.ai__row{display:flex;justify-content:space-between;align-items:center;padding:.6rem 0;border-bottom:1px dashed rgba(255,255,255,.12);font-size:.95rem;color:#cbbfb0}
.ai__row b{color:#fff}
.ai__swatches{display:flex;gap:.5rem;padding:.8rem 0}
.ai__swatches i{width:38px;height:38px;border-radius:10px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.1)}
.ai__bar{height:8px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden;margin-top:.6rem}
.ai__bar i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--accent));border-radius:999px}
.ai__panel small{color:#cbbfb0}

/* ---------- 人气榜 ---------- */
.leaderboard{max-width:var(--maxw);margin:0 auto;padding:1rem 1.2rem 3rem}
.lb{list-style:none;counter-reset:rank;display:grid;gap:.8rem}
.lb li{display:flex;align-items:center;gap:1rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:.8rem 1.1rem;box-shadow:var(--shadow-sm)}
.lb__rank{counter-increment:rank;font-family:var(--serif);font-size:1.4rem;font-weight:800;color:var(--accent);min-width:1.8rem}
.lb li:nth-child(1) .lb__rank::before{content:"🥇 "}
.lb li:nth-child(2) .lb__rank::before{content:"🥈 "}
.lb li:nth-child(3) .lb__rank::before{content:"🥉 "}
.lb li:not(:nth-child(1)):not(:nth-child(2)):not(:nth-child(3)) .lb__rank::before{content:counter(rank)"."}
.lb__title{font-weight:800;flex:1}
.lb__type{font-size:.8rem;color:var(--muted)}
.lb__votes{font-weight:800;color:var(--accent-d);display:flex;align-items:center;gap:.3rem}

/* ---------- Footer ---------- */
.footer{background:var(--ink);color:#e9e1d6;margin-top:2rem}
.footer__inner{max-width:var(--maxw);margin:0 auto;padding:2.5rem 1.2rem;display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap}
.footer__brand{font-family:var(--serif);font-size:1.2rem}
.footer__brand p{font-family:var(--sans);font-size:.9rem;color:#b8ac9c;margin-top:.5rem;max-width:30ch}
.footer__cols{display:flex;gap:3rem}
.footer__cols b{display:block;margin-bottom:.6rem;color:#fff}
.footer__cols a{display:block;color:#b8ac9c;font-size:.9rem;padding:.2rem 0}
.footer__cols a:hover{color:var(--gold)}
.footer__bar{border-top:1px solid rgba(255,255,255,.1);text-align:center;padding:1rem;font-size:.82rem;color:#9a8f80}

/* ---------- 弹层 ---------- */
.modal{position:fixed;inset:0;z-index:60;display:none;align-items:flex-start;justify-content:center;padding:4vh 1rem;overflow:auto}
.modal.open{display:flex}
.modal__backdrop{position:fixed;inset:0;background:rgba(35,30,25,.55);backdrop-filter:blur(3px)}
.modal__dialog{position:relative;background:var(--surface);border-radius:var(--radius);max-width:720px;width:100%;padding:2rem;box-shadow:var(--shadow);animation:pop .25s ease}
.modal--sm .modal__dialog{max-width:480px}
@keyframes pop{from{transform:translateY(12px) scale(.98);opacity:0}to{transform:none;opacity:1}}
.modal__close{position:absolute;top:1rem;right:1rem;width:34px;height:34px;border-radius:50%;background:var(--surface-2);color:var(--ink);font-size:1rem}
.modal__close:hover{background:var(--line)}
.modal__title{font-family:var(--serif);font-size:1.6rem;margin-bottom:.3rem}
.modal__sub{color:var(--muted);margin-bottom:1.2rem;font-size:.95rem}
.uhidden{display:none}

/* 上传区 */
.uploader{border:2px dashed var(--line);border-radius:var(--radius);background:var(--surface-2);min-height:200px;display:grid;place-items:center;cursor:pointer;position:relative;overflow:hidden;margin-bottom:1.2rem;transition:.15s}
.uploader.drag{border-color:var(--accent);background:rgba(226,114,91,.06)}
.uploader__hint{text-align:center;color:var(--muted);padding:1.5rem}
.uploader__icon{font-size:2.4rem;margin-bottom:.4rem}
.uploader__hint b{color:var(--ink)}
.uploader__preview{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}

/* 表单 */
.form{display:grid;gap:1rem}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form label{display:grid;gap:.4rem;font-size:.9rem;font-weight:700;color:var(--ink)}
.form input,.form select{padding:.7rem .85rem;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:.95rem;background:var(--surface);color:var(--ink)}
.form input:focus,.form select:focus{outline:none;border-color:var(--accent)}
.checkgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}
.chk{display:flex!important;align-items:center;gap:.4rem;font-weight:500!important;font-size:.85rem!important;background:var(--surface-2);padding:.5rem .6rem;border-radius:10px;cursor:pointer;border:1.5px solid transparent}
.chk input{width:auto}
.chk:has(input:checked){border-color:var(--accent);background:rgba(226,114,91,.08)}

/* 加载 */
.loader{text-align:center;padding:1.5rem 0}
.loader__spinner{width:54px;height:54px;border:5px solid var(--surface-2);border-top-color:var(--accent);border-radius:50%;margin:0 auto 1.4rem;animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loader__log{list-style:none;display:grid;gap:.5rem;text-align:left;max-width:340px;margin:0 auto;font-size:.92rem;color:var(--muted)}
.loader__log li{opacity:0;transform:translateY(6px);transition:.3s}
.loader__log li.show{opacity:1;transform:none}
.loader__log li::before{content:"○ ";color:var(--accent)}
.loader__log li.done::before{content:"✓ ";color:var(--sage-d)}

/* 结果 */
.result{display:grid;gap:1.4rem}
.result__visual{display:block}
.rv__before,.rv__after{border-radius:var(--radius-sm);overflow:hidden;position:relative;aspect-ratio:4/3;background:var(--surface-2)}
.rv__before img{width:100%;height:100%;object-fit:cover}
.rv__before span,.rv__after span{position:absolute;top:8px;left:8px;background:rgba(42,38,34,.78);color:#fff;font-size:.72rem;padding:.2rem .55rem;border-radius:999px;z-index:2}
.rv__arrow{font-size:1.4rem;color:var(--accent)}
.rv__concept{width:100%;height:100%;background-size:cover;background-position:center}
.result__plan{display:grid;grid-template-columns:repeat(2,1fr);gap:.9rem}
.plan-card{background:var(--surface-2);border-radius:var(--radius-sm);padding:1rem}
.plan-card h4{font-size:.78rem;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-bottom:.5rem}
.plan-card p{font-size:.95rem}
.plan-card .big{font-family:var(--serif);font-size:1.15rem;font-weight:800;color:var(--ink)}
.swatches{display:flex;gap:.4rem}
.swatches i{width:30px;height:30px;border-radius:8px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.plan-list{list-style:none;display:grid;gap:.35rem;font-size:.9rem}
.plan-list li::before{content:"▪ ";color:var(--sage)}
.result__actions{display:flex;gap:.8rem;margin-top:.4rem;flex-wrap:wrap}
.res-note{font-size:.85rem;color:var(--muted);background:var(--surface-2);padding:.6rem .9rem;border-radius:10px;margin-top:.4rem}
.res-note--ok{color:var(--sage-d);background:rgba(124,152,133,.14)}
.res-note--demo{color:#9a6b3f;background:rgba(217,185,143,.18)}

/* 详情 */
.detail__hero{height:220px;background-size:cover;background-position:center;border-radius:var(--radius-sm);margin-bottom:1rem}
.detail__title{font-family:var(--serif);font-size:1.5rem;margin-bottom:.3rem}
.detail__meta{color:var(--muted);font-size:.9rem;margin-bottom:1rem;display:flex;gap:.8rem;flex-wrap:wrap}
.detail__sec{margin-bottom:1rem}
.detail__sec h4{font-size:.8rem;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-bottom:.4rem}
.detail__vote{display:flex;align-items:center;gap:1rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--line)}

/* Toast */
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:.8rem 1.3rem;border-radius:999px;font-size:.92rem;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.3s;z-index:80}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 响应式 ---------- */
@media(max-width:920px){
  .hero__inner,.ai__inner{grid-template-columns:1fr}
  .hero__visual{height:340px;order:-1}
  .steps{grid-template-columns:1fr}
}
@media(max-width:620px){
  .nav__links{display:none}
  .form__row,.checkgrid,.result__plan{grid-template-columns:1fr}
  .hero__stats{gap:1.4rem}
  .footer__inner{flex-direction:column}
}

/* ---------- 改造前/后 对比滑块 ---------- */
.ba{position:absolute;inset:0;overflow:hidden;user-select:none;touch-action:none;background:var(--surface-2)}
.ba__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;pointer-events:none}
.ba__after{z-index:1}
.ba__before{z-index:2;clip-path:inset(0 calc(100% - var(--pos,50%)) 0 0)}
.ba__tag{position:absolute;top:8px;font-size:.7rem;font-weight:800;padding:.22rem .55rem;border-radius:999px;color:#fff;z-index:5;pointer-events:none;letter-spacing:.5px}
.ba__tag--before{left:8px;background:rgba(122,112,102,.9)}
.ba__tag--after{right:8px;background:rgba(124,152,133,.95)}
.ba__handle{position:absolute;top:0;bottom:0;left:var(--pos,50%);width:2px;background:#fff;transform:translateX(-1px);z-index:3;pointer-events:none;box-shadow:0 0 0 1px rgba(0,0,0,.18)}
.ba__handle span{position:absolute;top:50%;left:50%;width:32px;height:32px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);display:grid;place-items:center;box-shadow:0 2px 10px rgba(0,0,0,.3);color:var(--ink);font-size:.85rem}
.ba__range{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize;z-index:4}
.card__media-img{position:absolute;inset:0;background-size:cover;background-position:center}
.detail__ba{height:240px;border-radius:var(--radius-sm);overflow:hidden;position:relative;margin-bottom:1rem}
.rv__ba{aspect-ratio:4/3;border-radius:var(--radius-sm);overflow:hidden;position:relative;background:var(--surface-2)}
.rv__single{width:100%;height:100%;background-size:cover;background-position:center}