/* 新办公室设计 · 统一样式（首页 / 方案页 / 档案页共用） */
:root{
  --bg:#f5f3ee; --card:#ffffff; --ink:#1d2024; --ink2:#4a5058; --mute:#7c838b; --line:#e2dfd7; --soft:#ecE9e2;
  --accent:#2f4a3a; --accent-ink:#ffffff; --chip:#ebe8e1;
  --radius:18px; --shadow:0 1px 2px rgba(20,20,20,.04),0 8px 28px rgba(20,20,20,.06);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"SF Mono","IBM Plex Mono",Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#131416; --card:#1c1e21; --ink:#ecebe7; --ink2:#bfc3c8; --mute:#8d939a; --line:#2c2f33; --soft:#232529; --chip:#26292d;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 28px rgba(0,0,0,.35); color-scheme:dark;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
@media (max-width:640px){.wrap{padding:0 16px}}

/* 顶栏 */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:16px;height:56px}
.brand{font-weight:700;text-decoration:none;letter-spacing:.02em;font-size:15px;white-space:nowrap}
.brand span{color:var(--mute);font-weight:500;margin-left:6px}
.top nav{margin-left:auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.top nav::-webkit-scrollbar{display:none}
.top nav a{font-size:13.5px;text-decoration:none;padding:6px 12px;border-radius:999px;color:var(--ink2);white-space:nowrap}
.top nav a[aria-current="page"]{background:var(--ink);color:var(--bg)}
.top nav a:hover{background:var(--chip)}

/* 标题区 */
.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--mute);font-weight:600;margin:0 0 10px}
h1.display{font-size:clamp(34px,6vw,64px);line-height:1.08;letter-spacing:-.01em;margin:0;font-weight:750;text-wrap:balance}
.lede{font-size:clamp(16px,2vw,19px);color:var(--ink2);margin:14px 0 0;max-width:40em;text-wrap:pretty}
.hero{padding-top:56px;padding-bottom:28px}
@media (max-width:640px){.hero{padding-top:36px;padding-bottom:20px}}
h2.sec{font-size:clamp(22px,3vw,30px);margin:0;letter-spacing:-.005em;font-weight:700}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin:56px 0 18px}
.sec-head p{margin:0;color:var(--mute);font-size:13.5px}
@media (max-width:640px){.sec-head{margin:40px 0 14px;flex-direction:column;gap:4px}}

/* 档位切换 */
.tiers{display:inline-flex;background:var(--chip);border-radius:999px;padding:4px;gap:2px}
.tiers button{font:inherit;font-size:14px;border:0;background:transparent;color:var(--ink2);padding:8px 16px;border-radius:999px;cursor:pointer;white-space:nowrap}
.tiers button[aria-pressed="true"]{background:var(--card);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12);font-weight:650}
.tiers button:focus-visible,.tiers button:hover{color:var(--ink)}
.tierbar{position:sticky;top:56px;z-index:15;padding:10px 0;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.tierbar .wrap{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.price{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;font-weight:650;letter-spacing:-.01em}
.price small{font-family:var(--sans);font-size:12px;color:var(--mute);font-weight:500;margin-left:6px;letter-spacing:0}
@media (max-width:640px){.tiers button{padding:7px 12px;font-size:13px}.price{font-size:18px}}

/* 3D */
.stage3d{position:relative;border-radius:var(--radius);overflow:hidden;background:#e3e5df;box-shadow:var(--shadow);aspect-ratio:16/9;max-height:78vh}
.stage3d iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.stage3d .full{position:absolute;right:12px;top:12px;z-index:2;background:rgba(255,255,255,.9);color:#1d2024;border-radius:999px;padding:6px 12px;font-size:12.5px;text-decoration:none;box-shadow:0 1px 4px rgba(0,0,0,.12)}
@media (max-width:640px){.stage3d{aspect-ratio:4/5;border-radius:14px}}
.cap{font-size:12.5px;color:var(--mute);margin:10px 2px 0}

/* 效果图 */
.gallery{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.gallery figure{margin:0;position:relative;border-radius:14px;overflow:hidden;background:var(--soft);cursor:zoom-in}
.gallery figure:nth-child(1),.gallery figure:nth-child(2){grid-column:span 3}
.gallery figure:nth-child(n+3){grid-column:span 2}
.gallery img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .5s ease}
.gallery figure:hover img{transform:scale(1.02)}
.gallery figcaption{position:absolute;left:10px;bottom:10px;background:rgba(20,22,25,.72);color:#fff;font-size:12.5px;padding:4px 10px;border-radius:999px;backdrop-filter:blur(6px)}
@media (max-width:760px){.gallery{grid-template-columns:1fr 1fr;gap:8px}.gallery figure:nth-child(n){grid-column:span 1}.gallery figure:nth-child(1){grid-column:span 2}}

/* 平面 */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.plans figure{margin:0;background:#fbfaf6;border-radius:14px;overflow:hidden;cursor:zoom-in;box-shadow:var(--shadow)}
.plans figcaption{font-size:13px;color:#4a5058;padding:0 14px 12px}
@media (max-width:760px){.plans{grid-template-columns:1fr}}

/* 三点思路 */
.ideas{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.idea{background:var(--card);border-radius:var(--radius);padding:22px 22px 20px;box-shadow:var(--shadow)}
.idea b{display:block;font-size:17px;margin-bottom:6px}
.idea p{margin:0;color:var(--ink2);font-size:14.5px}
.idea i{font-style:normal;font-family:var(--mono);color:var(--accent);font-size:12px;display:block;margin-bottom:10px}
@media (max-width:760px){.ideas{grid-template-columns:1fr}}

/* 地面说明条 */
.floorband{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.floorband span{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink2);background:var(--card);border-radius:999px;padding:6px 12px;box-shadow:var(--shadow)}
.floorband i{width:12px;height:12px;border-radius:3px;display:inline-block}

/* 费用明细（点开） */
details.costs{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
details.costs summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;padding:18px 22px;font-weight:650}
details.costs summary::-webkit-details-marker{display:none}
details.costs summary .price{margin-left:auto;font-size:18px}
details.costs summary::after{content:"＋";color:var(--mute);font-weight:400;margin-left:8px}
details.costs[open] summary::after{content:"－"}
.costs .body{padding:0 22px 20px}
.costs table{width:100%;border-collapse:collapse;font-size:14px}
.costs td{padding:8px 0;border-top:1px solid var(--line);vertical-align:top}
.costs td:last-child{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap;padding-left:12px}
.costs tr.total td{font-weight:700;border-top:2px solid var(--ink)}
.costs .extras{margin-top:14px;font-size:13px;color:var(--mute)}
.costs .notes{margin:14px 0 0;padding-left:18px;font-size:13px;color:var(--ink2)}
.cmp{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.cmp div{border:1px solid var(--line);border-radius:12px;padding:12px}
.cmp div[aria-current="true"]{border-color:var(--ink)}
.cmp b{display:block;font-size:13px}
.cmp span{font-family:var(--mono);font-size:15px}
.cmp ul{margin:6px 0 0;padding-left:16px;font-size:12.5px;color:var(--ink2)}
@media (max-width:640px){.cmp{grid-template-columns:1fr}}

/* 首页方案卡 */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border-radius:22px;overflow:hidden;box-shadow:var(--shadow);text-decoration:none;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(0,0,0,.05),0 16px 40px rgba(0,0,0,.09)}
.card img{aspect-ratio:3/2;object-fit:cover;width:100%;background:#e6e6e3}
.card .in{padding:18px 20px 20px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .tag{font-size:11.5px;letter-spacing:.14em;color:var(--mute);font-weight:600;text-transform:uppercase}
.card h3{margin:0;font-size:22px;letter-spacing:-.005em}
.card p{margin:0;color:var(--ink2);font-size:14px}
.card .prices{display:flex;gap:6px;margin-top:auto;padding-top:12px;flex-wrap:wrap}
.card .prices span{font-family:var(--mono);font-size:12.5px;background:var(--chip);border-radius:999px;padding:3px 9px}
.card .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:1px}
.cards.four{grid-template-columns:repeat(4,1fr)}.cards.four h3{font-size:19px}
@media (max-width:1100px){.cards.four{grid-template-columns:repeat(2,1fr)}}
@media (max-width:900px){.cards{grid-template-columns:1fr}.cards.four{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.cards.four{grid-template-columns:1fr}}

.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.fact{background:var(--card);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow)}
.fact b{display:block;font-size:22px;font-family:var(--mono);font-weight:650}
.fact span{font-size:13px;color:var(--ink2)}
@media (max-width:760px){.facts{grid-template-columns:1fr 1fr}}

.foot{margin:72px 0 40px;padding-top:20px;border-top:1px solid var(--line);color:var(--mute);font-size:12.5px;display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
.foot a{color:var(--mute)}

/* 灯箱 */
dialog.lb{border:0;padding:0;background:transparent;max-width:100vw;max-height:100vh;width:100vw;height:100vh}
dialog.lb::backdrop{background:rgba(10,11,12,.9)}
.lb .box{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:56px 64px}
.lb img{max-width:100%;max-height:100%;object-fit:contain;border-radius:8px;background:#fbfaf6}
.lb .t{position:absolute;left:0;right:0;top:14px;text-align:center;color:#eee;font-size:14px}
.lb button{position:absolute;background:rgba(255,255,255,.12);color:#fff;border:0;border-radius:999px;width:44px;height:44px;font-size:20px;cursor:pointer}
.lb button:hover{background:rgba(255,255,255,.22)}
.lb .x{right:14px;top:10px}.lb .p{left:12px;top:50%}.lb .n{right:12px;top:50%}
@media (max-width:640px){.lb .box{padding:52px 8px}.lb .p,.lb .n{top:auto;bottom:14px}}

.photos{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.photos figure{margin:0;border-radius:12px;overflow:hidden;background:var(--soft);cursor:zoom-in;position:relative}
.photos img{aspect-ratio:4/3;object-fit:cover;width:100%}
.photos figcaption{font-size:12.5px;padding:8px 10px;color:var(--ink2)}
.muted{color:var(--mute)}
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--ink);color:var(--bg);text-decoration:none;border-radius:999px;padding:9px 16px;font-size:14px;font-weight:600}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}