/* roulang page: index */
:root{
 --ink:#1f2124;--muted:#69645d;--paper:#f3eee6;--soft:#e8e2d8;--line:#d9d1c6;
 --asphalt:#1a1c1f;--asphalt2:#24262b;--copper:#c56a2d;--copper2:#d8893a;
 --teal:#2f7d6d;--amber:#e0a100;--white:#f8f3eb;--radius:8px;
 --shadow:0 8px 24px rgba(31,33,36,.07);--max:1220px;--ease:all .25s ease
}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}
a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--copper);font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:700}.eyebrow:before{content:"";width:25px;height:1px;background:var(--copper)}
h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.25}h2{font-size:32px;margin-bottom:16px;letter-spacing:-.03em}h3{font-size:19px;margin-bottom:8px}.section-head{max-width:680px;margin-bottom:34px}.section-head p{color:var(--muted);margin:0;line-height:1.85}
.topbar{height:38px;background:#111315;color:#bdb8af;font-size:12px}.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}.top-info{display:flex;gap:22px;align-items:center}.top-info a:hover{color:#fff}.top-cta{height:28px;padding:0 14px;display:inline-flex;align-items:center;background:var(--copper);color:#fff;border-radius:4px;font-weight:700}
.mainnav{height:70px;background:var(--asphalt);color:var(--white);position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(216,137,58,.18);transition:var(--ease)}.mainnav .container{height:100%;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:21px;letter-spacing:.04em;white-space:nowrap}.brand-mark{width:30px;height:30px;border:2px solid var(--copper2);display:grid;place-items:center;color:var(--copper2);font-size:12px;border-radius:5px}.brand small{font-size:9px;color:#8e8981;display:block;letter-spacing:.12em;font-weight:400}.navlinks{display:flex;align-items:center;gap:4px;height:100%}.navlinks a{height:100%;display:flex;align-items:center;padding:0 14px;font-size:14px;color:#d0cbc3;border-bottom:2px solid transparent;transition:var(--ease)}.navlinks a:hover,.navlinks a.active{color:#fff;border-bottom-color:var(--copper2)}.menu-toggle{display:none;background:none;border:1px solid #777;color:#fff;border-radius:4px;width:44px;height:44px}
.hero{min-height:590px;position:relative;overflow:hidden;color:#fff;background:var(--asphalt)}.slides{height:590px;position:relative}.slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .7s ease;display:flex;align-items:center}.slide.active{opacity:1;z-index:1}.slide:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,20,22,.9) 0%,rgba(18,20,22,.62) 48%,rgba(18,20,22,.22) 100%)}.hero-content{position:relative;z-index:2;max-width:680px}.hero h1{font-size:clamp(38px,5vw,58px);margin:17px 0 20px;letter-spacing:-.05em}.hero p{font-size:17px;color:#e4ded5;max-width:630px;line-height:1.9;margin-bottom:29px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn{min-height:46px;padding:10px 20px;border:1px solid transparent;border-radius:5px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;transition:var(--ease)}.btn-primary{background:var(--asphalt);color:#fff}.hero .btn-primary{background:var(--copper);color:#fff}.btn-primary:hover,.hero .btn-primary:hover{background:var(--copper2);transform:translateY(-2px)}.btn-outline{border-color:var(--copper2);color:var(--copper2);background:transparent}.btn-outline:hover{background:var(--copper);color:#fff}.hero .btn-outline{color:#fff;border-color:#eee}.slide-controls{position:absolute;z-index:3;bottom:42px;right:max(24px,calc((100% - var(--max))/2));display:flex;gap:9px}.slide-arrow{width:42px;height:42px;border:1px solid rgba(255,255,255,.45);background:rgba(20,20,20,.4);color:#fff;border-radius:4px}.slide-arrow:hover{border-color:var(--copper2);color:var(--copper2)}.slide-dots{position:absolute;z-index:3;bottom:57px;left:max(24px,calc((100% - var(--max))/2));display:flex;gap:6px}.slide-dots button{width:32px;height:3px;padding:0;border:0;background:#817c74}.slide-dots button.active{background:var(--copper2);width:52px}
section{padding:88px 0}.board-section{padding-top:74px;border-bottom:1px solid var(--line)}.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.metric-main{grid-column:span 8;background:var(--asphalt);color:#fff;padding:30px;min-height:218px;border-radius:var(--radius);position:relative;overflow:hidden}.metric-main:after{content:"ESTIMATE / 04";position:absolute;right:24px;bottom:17px;color:#65716e;font:12px monospace;letter-spacing:.16em}.metric-main .big-number{font-size:55px;font-weight:700;line-height:1;margin:17px 0 10px;color:var(--copper2);font-variant-numeric:tabular-nums}.metric-main p{color:#beb9b0;margin:0}.metric-small{grid-column:span 2;background:#fff;border:1px solid var(--line);padding:22px 18px;border-radius:var(--radius);min-height:218px}.metric-small strong{display:block;font-size:30px;line-height:1.2;color:var(--teal);font-variant-numeric:tabular-nums;margin:14px 0 8px}.metric-small:nth-child(3) strong{color:var(--copper)}.metric-small p{font-size:13px;color:var(--muted);line-height:1.6;margin:0}.metric-label{font-size:12px;color:var(--muted);font-weight:700}.intro{background:#faf7f2}.intro-grid{display:grid;grid-template-columns:5fr 7fr;gap:54px;align-items:center}.intro-photo{height:400px;overflow:hidden;border-radius:var(--radius)}.intro-photo img{width:100%;height:100%;object-fit:cover}.intro-copy p{color:var(--muted);line-height:1.9}.parameter{border-left:3px solid var(--copper);padding:12px 16px;background:#eee8df;margin:22px 0;color:#393631}.badges{display:flex;gap:9px;flex-wrap:wrap}.badge{border:1px solid #cfc2b4;padding:5px 10px;border-radius:4px;font-size:12px;color:#5c554d;background:#fff}
.services{background:var(--paper)}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.service-card{padding:25px 24px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);min-height:190px;position:relative;transition:var(--ease)}.service-card:after{content:"";height:2px;background:var(--copper);position:absolute;bottom:0;left:24px;right:24px;transform:scaleX(0);transform-origin:left;transition:var(--ease)}.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c88b60}.service-card:hover:after{transform:scaleX(1)}.number{font:700 12px monospace;color:var(--copper);letter-spacing:.1em}.service-card p{font-size:14px;color:var(--muted);line-height:1.7;margin:0}
.scenes{background:#ebe5dc}.scene-layout{display:grid;grid-template-columns:1.3fr 1fr;gap:14px}.scene-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:var(--ease)}.scene-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.scene-large{grid-row:span 2}.scene-card img{width:100%;height:180px;object-fit:cover}.scene-large img{height:290px}.scene-info{padding:20px}.scene-info p{color:var(--muted);font-size:14px;margin-bottom:13px}.scene-small{display:grid;grid-template-columns:145px 1fr}.scene-small img{height:100%;min-height:155px}
.compare{background:#faf7f2}.compare-wrap{border:1px solid var(--line);background:#fff;border-radius:var(--radius);overflow:hidden}.compare-head,.compare-row{display:grid;grid-template-columns:2fr 1.2fr 1.2fr 1.2fr;align-items:center}.compare-head{background:var(--asphalt);color:#fff;font-size:13px;padding:15px 20px}.compare-row{padding:18px 20px;border-bottom:1px solid var(--soft);font-size:14px}.compare-row:last-child{border:0}.condition small{display:block;color:var(--muted);font-size:12px}.price{font:700 17px monospace;color:var(--ink)}.price.copper{color:var(--copper)}.price.teal{color:var(--teal)}
.case-section{background:var(--asphalt);color:var(--white)}.case-section .section-head p{color:#bbb5ad}.case-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:55px;align-items:start}.case-intro{position:sticky;top:135px}.case-intro h2{font-size:35px}.case-intro p{color:#bdb8b0}.case-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}.case-card{background:var(--asphalt2);border:1px solid rgba(216,137,58,.35);padding:25px;border-radius:var(--radius)}.case-card h3{color:#fff}.case-card dl{margin:20px 0 0}.case-card dt{color:var(--copper2);font-size:12px;margin-top:12px}.case-card dd{margin:3px 0;color:#d4cfc7;font-size:14px}.conclusion{border-top:1px solid rgba(216,137,58,.35);margin-top:20px;padding-top:16px;color:var(--copper2);font-weight:700}
.timeline{position:relative;margin-top:35px}.timeline:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:#c9bdae}.milestone{width:50%;padding:0 46px 35px;position:relative}.milestone:nth-child(even){margin-left:50%;padding-left:46px}.milestone:after{content:"";position:absolute;right:-6px;top:5px;width:11px;height:11px;background:var(--copper);border:3px solid var(--paper);border-radius:50%;box-sizing:content-box}.milestone:nth-child(even):after{left:-6px}.milestone time{font:700 12px monospace;color:var(--copper)}.milestone p{font-size:14px;color:var(--muted);margin:0}
.stories{background:#ebe5dc}.story-grid,.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.story{background:#fff;padding:24px;border:1px solid var(--line);border-radius:var(--radius)}.avatar{width:38px;height:38px;display:grid;place-items:center;background:var(--asphalt);color:var(--copper2);border-radius:50%;font-weight:700;float:left;margin-right:12px}.story h3{padding-top:5px}.story .car{font-size:12px;color:var(--copper)}.story p{clear:both;padding-top:18px;color:var(--muted);font-size:14px;margin:0}
.reviews{background:#faf7f2}.review{background:#fff;border:1px solid var(--line);padding:22px;border-radius:var(--radius)}.stars{color:var(--copper);letter-spacing:3px;font-size:15px}.review p{font-size:14px;color:var(--muted);margin:11px 0}.review footer{font-size:12px;color:#8a837a}
.news{background:var(--paper)}.news-layout{display:grid;grid-template-columns:1.15fr 1fr;gap:38px}.feature-news{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.feature-news img{width:100%;height:235px;object-fit:cover}.news-copy{padding:22px}.news-copy p,.news-item p{font-size:14px;color:var(--muted);margin:4px 0}.news-list{display:flex;flex-direction:column;gap:10px}.news-item{display:grid;grid-template-columns:110px 1fr;gap:16px;padding:13px;background:#fff;border-bottom:1px solid var(--line)}.news-item img{width:110px;height:80px;object-fit:cover;border-radius:5px}.news-item time,.feature-news time{font-size:12px;color:var(--copper)}
.assurance{background:#ebe5dc}.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.assure{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.assure-mark{width:30px;height:30px;border:1px solid var(--teal);color:var(--teal);display:grid;place-items:center;border-radius:50%;font-size:12px;margin-bottom:13px}.assure p{color:var(--muted);font-size:13px;line-height:1.7;margin:0}
.quick{padding:64px 0 30px}.chips{display:flex;gap:10px;flex-wrap:wrap}.chip{border:1px solid #cbbbaa;background:#fff;border-radius:22px;padding:9px 16px;color:#514b44;font-size:14px;min-height:44px;transition:var(--ease)}.chip:hover{border-color:var(--copper);color:var(--copper)}
.faq{padding-top:30px}.faq-list{max-width:860px}.faq-item{border-top:1px solid var(--line)}.faq-q{width:100%;background:none;border:0;text-align:left;padding:19px 38px 19px 0;font-weight:700;color:var(--ink);position:relative}.faq-q:after{content:"+";position:absolute;right:5px;font-size:22px;color:var(--copper);top:14px}.faq-item.open .faq-q:after{content:"−"}.faq-a{max-height:0;overflow:hidden;color:var(--muted);font-size:14px;transition:max-height .3s ease}.faq-item.open .faq-a{max-height:150px;padding:0 35px 18px 0}
.form-section{padding-top:70px}.form-box{display:grid;grid-template-columns:.8fr 1.2fr;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.form-side{background:var(--asphalt);color:#fff;padding:38px}.form-side p{color:#c0bbb3;font-size:14px}.contact-line{margin-top:30px;padding-top:20px;border-top:1px solid #45474a;color:var(--copper2)}.estimate-form{padding:32px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:flex;flex-direction:column;gap:5px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);background:#fbf9f6;border-radius:4px;padding:10px 12px;min-height:44px;color:var(--ink)}.field textarea{height:92px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus,.faq-q:focus,.btn:focus,.menu-toggle:focus{outline:3px solid rgba(197,106,45,.3);outline-offset:2px;border-color:var(--copper)}.form-note{font-size:12px;color:var(--muted);margin:14px 0}.form-status{display:none;margin-top:12px;padding:10px;background:#e3f0eb;color:var(--teal);font-size:13px}.form-status.show{display:block}.bottom-cta{margin-top:14px;background:var(--asphalt2);color:#fff;padding:22px 30px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-radius:var(--radius)}.bottom-cta p{margin:0;color:#d2cbc1}.bottom-cta a:not(.btn){color:var(--copper2);font-weight:700}
footer{background:#111315;color:#c3beb5;padding:52px 0 22px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:35px}.footer-brand{color:#fff;font-weight:700;font-size:20px}.footer h3{font-size:14px;color:#fff;margin-bottom:14px}.footer p,.footer a{font-size:13px;color:#aaa49b;margin:4px 0;display:block}.footer a:hover{color:var(--copper2)}.copyright{border-top:1px solid #303235;margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#817c75}
@media(max-width:1024px){.navlinks a{padding:0 8px;font-size:13px}.metric-main{grid-column:span 6}.metric-small{grid-column:span 3}.intro-grid{gap:30px}.case-grid{gap:30px}}
@media(max-width:768px){.container{width:min(100% - 32px,var(--max))}.topbar{height:auto;min-height:38px}.top-info{gap:10px;flex-wrap:wrap;padding:6px 0}.top-info span:nth-child(2),.top-info span:nth-child(3){display:none}.top-cta{margin-left:auto}.mainnav{height:64px}.brand{font-size:18px}.menu-toggle{display:block}.navlinks{position:absolute;top:64px;left:0;right:0;height:auto;display:none;background:var(--asphalt);padding:8px 16px 16px;border-top:1px solid #343639;box-shadow:0 12px 22px #111}.navlinks.open{display:flex;flex-direction:column;align-items:stretch}.navlinks a{height:45px;padding:0 10px;border-bottom:1px solid #36383a}.hero,.slides{min-height:560px;height:560px}.hero h1{font-size:34px}.hero p{font-size:15px}.slide-controls{right:16px;bottom:28px}.slide-dots{left:16px;bottom:47px}section{padding:62px 0}h2{font-size:26px}.metric-main{grid-column:span 12}.metric-small{grid-column:span 6;min-height:150px}.metric-small strong{font-size:26px}.intro-grid,.news-layout,.case-grid,.form-box{grid-template-columns:1fr}.intro-photo{height:270px}.service-grid{grid-template-columns:1fr 1fr}.scene-layout{grid-template-columns:1fr}.scene-large{grid-row:auto}.scene-small{grid-template-columns:130px 1fr}.scene-large img{height:220px}.case-intro{position:static}.case-cards{grid-template-columns:1fr}.timeline:before{left:6px}.milestone,.milestone:nth-child(even){width:100%;margin:0;padding:0 0 30px 32px}.milestone:after,.milestone:nth-child(even):after{left:0;right:auto}.story-grid,.review-grid{grid-template-columns:1fr}.assure-grid{grid-template-columns:1fr 1fr}.estimate-form{padding:24px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{flex-direction:column}}
@media(max-width:520px){.hero-actions .btn{width:100%}.metric-main{min-height:200px;padding:24px}.metric-main .big-number{font-size:45px}.service-grid{grid-template-columns:1fr}.compare-wrap{border:0;background:transparent;overflow:visible}.compare-head{display:none}.compare-row{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;padding:16px}.compare-row>div{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px solid #eee8df}.compare-row>div:last-child{border:0}.compare-row>div:before{font-size:12px;color:var(--muted)}.compare-row>div:nth-child(2):before{content:"估价结果"}.compare-row>div:nth-child(3):before{content:"挂牌参考"}.compare-row>div:nth-child(4):before{content:"成交参考"}.scene-small{display:block}.scene-small img{height:150px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.bottom-cta{align-items:flex-start;flex-direction:column;padding:20px}.footer-grid{grid-template-columns:1fr}.copyright{gap:5px}.top-info a{font-size:11px}}