/* roulang page: index */
:root{
  --ink:#1C1917;--seal:#7A1F2B;--seal-deep:#5E1720;--bronze:#8C734B;--ivory:#F4EFE6;--card:#FFFBF7;--dark:#161311;--muted:#6B645C;--line:rgba(28,25,23,.12);--line-strong:rgba(28,25,23,.22);--ivory-soft:#EBE4D6;--shadow:0 6px 16px rgba(28,25,23,.08);--shadow-h:0 10px 22px rgba(28,25,23,.12);--r:6px;--space:8px;--w:1240px;--nav2:72px;--bar:64px;--serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;--sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--ivory);padding-bottom:calc(var(--bar) + env(safe-area-inset-bottom,0px));overflow-x:hidden}
img{max-width:100%;display:block;height:auto}
a{color:var(--seal);text-decoration:none;transition:color .2s,border-color .2s,background .2s,box-shadow .2s,transform .2s}
a:hover{color:var(--seal-deep)}
button,input,select,textarea{font-family:inherit;font-size:16px}
button{cursor:pointer}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.35;letter-spacing:0;margin:0 0 16px}
h1{font-size:42px}
h2{font-size:34px}
h3{font-size:20px}
p{margin:0 0 18px}
ul,ol{margin:0;padding:0}
.container{width:min(100% - 40px,var(--w));margin:0 auto}
.skip{position:absolute;left:-999px;top:8px;background:var(--seal);color:var(--ivory);padding:8px 16px;z-index:100}
.skip:focus{left:8px}
.topbar{background:var(--ink);color:#D7D0C6;font-size:13px;height:36px;display:flex;align-items:center;overflow:hidden}
.topbar-inner{display:flex;gap:28px;align-items:center;white-space:nowrap;width:min(100% - 40px,var(--w));margin:0 auto}
.topbar a{color:#E8E0D4}
.topbar a:hover{color:#fff}
.topbar span{display:inline-flex;align-items:center;gap:6px}
.site-header{position:sticky;top:0;z-index:80;background:var(--card);border-bottom:1px solid var(--line);box-shadow:0 4px 12px rgba(28,25,23,.04)}
.nav-main{height:var(--nav2);display:flex;align-items:center}
.nav-inner{display:flex;align-items:center;gap:20px;width:min(100% - 40px,var(--w));margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);min-height:44px;flex:0 0 auto}
.logo:hover{color:var(--ink)}
.seal{width:36px;height:36px;border:1.5px solid var(--seal);border-radius:50%;display:grid;place-items:center;font-family:var(--serif);font-size:16px;color:var(--seal);position:relative}
.seal::after{content:"";position:absolute;inset:3px;border:1px solid rgba(140,115,75,.45);border-radius:50%}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-family:var(--serif);font-size:16px;font-weight:700}
.logo-text small{font-size:11px;color:var(--muted);font-weight:500}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;list-style:none}
.nav-links a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;color:var(--ink);font-size:14px;font-weight:500;position:relative}
.nav-links a:hover{color:var(--seal)}
.nav-links a.active::after,.nav-links a:hover::after{content:"";position:absolute;left:10px;right:10px;bottom:10px;height:2px;background:var(--seal)}
.nav-cta{margin-left:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--r);border:1px solid transparent;font-weight:600;letter-spacing:.02em;transition:background .2s,border-color .2s,transform .15s,box-shadow .2s}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--seal);outline-offset:2px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--seal);color:var(--ivory)}
.btn-primary:hover{background:var(--seal-deep);color:var(--ivory);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;border-color:rgba(244,239,230,.7);color:var(--ivory)}
.btn-ghost:hover{background:rgba(244,239,230,.12);color:#fff}
.btn-line{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-line:hover{border-color:var(--seal);color:var(--seal)}
.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line-strong);background:var(--card);border-radius:var(--r);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:18px;height:1.5px;background:var(--ink)}
.drawer{display:none}
.hero{position:relative;min-height:78vh;background:var(--dark);color:var(--ivory);overflow:hidden}
.slides{position:relative;min-height:78vh}
.slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .7s ease;background:#161311 center/cover no-repeat}
.slide.is-on{opacity:1;visibility:visible;position:relative}
.slide::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(22,19,17,.82) 0%,rgba(22,19,17,.55) 48%,rgba(22,19,17,.28) 100%);z-index:1}
.slide-inner{position:relative;z-index:2;width:min(100% - 40px,var(--w));margin:0 auto;min-height:78vh;display:flex;flex-direction:column;justify-content:center;padding:48px 0 88px;max-width:760px;margin-left:auto;margin-right:auto;width:min(100% - 40px,var(--w))}
.slides .slide-inner{margin-left:max(20px,calc((100% - var(--w))/2))}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.12em;color:#D9C7A3;margin-bottom:16px;text-transform:none}
.eyebrow i{width:28px;height:1px;background:var(--bronze);display:inline-block}
.hero h1,.slide h2.hero-title{font-size:clamp(28px,4vw,46px);color:var(--ivory);max-width:18em;margin-bottom:20px}
.hero-lead{font-size:16px;line-height:1.8;color:#E8E0D4;max-width:38em;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:16px 28px;font-size:13px;color:#C9C0B4}
.hero-meta b{display:block;font-family:var(--serif);font-size:20px;color:var(--ivory);font-weight:700}
.hero-ctrl{position:absolute;z-index:3;left:0;right:0;bottom:24px;width:min(100% - 40px,var(--w));margin:0 auto;display:flex;align-items:center;gap:12px}
.dots{display:flex;gap:8px}
.dots button{width:28px;height:4px;border:0;background:rgba(244,239,230,.35);border-radius:2px;padding:0;min-height:12px}
.dots button[aria-current="true"]{background:var(--ivory)}
.pause{width:44px;height:44px;border:1px solid rgba(244,239,230,.35);background:transparent;color:var(--ivory);border-radius:var(--r)}
.pause:hover{border-color:var(--ivory)}
.arrow{width:44px;height:44px;border:1px solid rgba(244,239,230,.35);background:transparent;color:var(--ivory);border-radius:var(--r);margin-left:auto}
.arrow + .arrow{margin-left:8px}
section{padding:72px 0;position:relative}
.sec-head{margin-bottom:40px;max-width:720px}
.sec-kicker{font-size:12px;letter-spacing:.18em;color:var(--seal);font-weight:600;margin-bottom:10px}
.sec-head p{color:var(--muted)}
.paper{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.points{padding:0;margin-top:-36px;position:relative;z-index:4}
.points-grid{display:grid;grid-template-columns:repeat(3,1fr);background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.point{display:flex;gap:16px;padding:28px 24px;min-height:120px;text-decoration:none;color:var(--ink);border-right:1px solid var(--line)}
.point:last-child{border-right:0}
.point:hover{background:#FFF8F0;color:var(--ink)}
.point:focus-visible{z-index:1}
.ico{width:44px;height:44px;flex:0 0 44px;border:1px solid var(--bronze);border-radius:50%;display:grid;place-items:center;color:var(--bronze)}
.point h3{font-size:18px;margin:0 0 6px}
.point p{margin:0;color:var(--muted);font-size:14px}
.split{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:center}
.frame{position:relative}
.frame img{width:100%;height:420px;object-fit:cover;border-radius:var(--r);border:1px solid var(--line)}
.frame figcaption{position:absolute;left:16px;bottom:16px;background:rgba(22,19,17,.78);color:var(--ivory);font-size:12px;padding:6px 10px;border-radius:4px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 24px}
.badge{display:inline-flex;align-items:center;min-height:32px;padding:0 10px;border:1px solid var(--bronze);color:var(--bronze);border-radius:4px;font-size:12px;letter-spacing:.04em}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px;margin:20px 0 0;list-style:none}
.facts li{font-size:14px;color:var(--muted);padding-left:14px;border-left:2px solid var(--seal)}
.facts b{color:var(--ink);display:block}
.scenes{background:linear-gradient(180deg,#EFE8DB 0%,var(--ivory) 100%)}
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.scene{display:grid;grid-template-columns:140px 1fr;gap:20px;padding:20px;align-items:center}
.scene img{width:140px;height:140px;object-fit:cover;border-radius:var(--r)}
.scene:hover{box-shadow:var(--shadow-h);border-color:var(--bronze)}
.scene h3{margin-bottom:8px}
.scene ul{list-style:none;margin:0 0 12px;color:var(--muted);font-size:14px}
.scene li{padding-left:12px;position:relative;margin-bottom:4px}
.scene li::before{content:"";width:5px;height:5px;background:var(--seal);border-radius:50%;position:absolute;left:0;top:.55em}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.adv{padding:24px;transition:box-shadow .2s,border-color .2s,transform .2s}
.adv:hover{box-shadow:var(--shadow-h);border-color:var(--seal);transform:translateY(-2px)}
.adv .ico{margin-bottom:16px}
.adv h3{font-size:18px}
.adv p{margin:0;color:var(--muted);font-size:15px}
.hot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:20px}
.hot{overflow:hidden;display:flex;flex-direction:column}
.hot img{width:100%;height:220px;object-fit:cover}
.hot-body{padding:22px;display:flex;flex-direction:column;flex:1}
.hot-body ul{list-style:none;margin:0 0 16px;font-size:14px;color:var(--muted)}
.hot-body li{margin-bottom:6px;padding-left:14px;position:relative}
.hot-body li::before{content:"·";position:absolute;left:0;color:var(--seal)}
.hot .btn{margin-top:auto;align-self:flex-start}
.dark{background:var(--dark) url("/assets/images/1f69c88426768775.jpg") center/cover no-repeat;color:var(--ivory);padding:88px 0}
.dark::before{content:"";position:absolute;inset:0;background:rgba(22,19,17,.88)}
.dark .container{position:relative;z-index:1;display:grid;grid-template-columns:0.9fr 1.1fr;gap:48px}
.quote-mark{font-family:var(--serif);font-size:64px;line-height:1;color:var(--bronze);margin:0}
.dark h2,.dark p{color:var(--ivory)}
.dark p{color:#D7D0C6}
.timeline{list-style:none;border-left:1px solid rgba(140,115,75,.4);padding-left:24px}
.timeline li{margin-bottom:24px;position:relative}
.timeline li::before{content:"";width:9px;height:9px;background:var(--seal);border-radius:50%;position:absolute;left:-29px;top:8px;box-shadow:0 0 0 4px rgba(122,31,43,.25)}
.timeline time{display:block;font-size:12px;color:#C4B7A2;letter-spacing:.08em;margin-bottom:4px}
.timeline h3{font-size:18px;color:var(--ivory);margin-bottom:6px}
.cred-line{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
.cred{min-height:44px;padding:8px 16px;border:1px solid var(--line-strong);border-radius:4px;background:var(--card);font-size:13px;display:flex;align-items:center;color:var(--ink)}
.cert-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;list-style:none}
.cert{padding:20px}
.cert h3{font-size:16px;margin-bottom:8px}
.cert p{margin:0;font-size:14px;color:var(--muted)}
.story-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.story{padding:0;overflow:hidden}
.story img{height:180px;width:100%;object-fit:cover}
.story-body{padding:20px}
.story h3{font-size:18px}
.kicker{font-size:12px;color:var(--seal);letter-spacing:.08em;margin-bottom:8px}
.stats{background:var(--ink);color:var(--ivory);padding:48px 0}
.stats-grid{display:flex;flex-wrap:wrap}
.stat{flex:1;min-width:160px;text-align:center;padding:12px 8px;border-right:1px solid rgba(244,239,230,.12)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--serif);font-size:36px;line-height:1.2;color:var(--ivory)}
.stat span{font-size:13px;color:#C9C0B4}
.compare-wrap{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--card)}
.compare-col{padding:28px}
.compare-col + .compare-col{border-left:1px solid var(--line);background:#F7F1E8}
.compare-col h3{font-size:20px}
.compare-col ul{list-style:none}
.compare-col li{padding:10px 0 10px 22px;position:relative;border-bottom:1px solid var(--line);font-size:15px}
.compare-col li:last-child{border-bottom:0}
.compare-col.ours li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--seal);position:absolute;left:0;top:16px}
.compare-col.other li::before{content:"";width:8px;height:1px;background:var(--muted);position:absolute;left:0;top:20px}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review{padding:24px}
.review q{font-family:var(--serif);font-size:17px;line-height:1.7;display:block;margin-bottom:16px}
.stars{color:var(--bronze);letter-spacing:2px;font-size:12px;margin-bottom:10px}
.who{font-size:13px;color:var(--muted)}
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.news{display:grid;grid-template-rows:auto 1fr;overflow:hidden}
.news img{height:150px;width:100%;object-fit:cover}
.news-body{padding:16px 16px 18px;border-left:3px solid var(--seal)}
.news.cat-adv .news-body{border-left-color:var(--bronze)}
.news.cat-comp .news-body{border-left-color:#4A5A48}
.news time{font-size:12px;color:var(--muted)}
.news h3{font-size:16px;margin:8px 0}
.news p{font-size:14px;color:var(--muted);margin:0}
.more-link{display:inline-flex;min-height:44px;align-items:center;font-weight:600}
.faq-list{display:flex;flex-direction:column;gap:10px;max-width:920px}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.faq-item[open]{border-color:var(--bronze)}
.faq-item summary{list-style:none;cursor:pointer;padding:16px 20px;min-height:52px;font-weight:600;font-family:var(--serif);display:flex;align-items:center;justify-content:space-between;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--seal);font-size:20px;font-weight:400;width:28px;text-align:center}
.faq-item[open] summary::after{content:"–"}
.faq-item .ans{padding:0 20px 18px;color:var(--muted)}
.faq-item .ans p{margin-bottom:12px}
.faq-item .ans p:last-child{margin:0}
.note{font-size:13px;color:var(--muted);margin-top:16px}
.guard{background:var(--ivory-soft);padding:36px 0}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.guard-item{padding:12px 20px;text-align:center;border-right:1px solid var(--line)}
.guard-item:last-child{border-right:0}
.guard-item h3{font-size:16px;margin:8px 0 4px}
.guard-item p{margin:0;font-size:13px;color:var(--muted)}
.process-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.step{padding:20px 16px;position:relative}
.step em{font-family:var(--serif);font-style:normal;font-size:28px;color:var(--bronze);display:block;line-height:1;margin-bottom:8px}
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.team{overflow:hidden}
.team img{height:240px;width:100%;object-fit:cover}
.team-body{padding:16px}
.team h3{font-size:18px;margin-bottom:4px}
.consult{background:var(--card);border-top:1px solid var(--line)}
.consult-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
.side-contact{margin-top:20px;padding:16px 0 0;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
.side-contact a{color:var(--ink);font-weight:600}
.form{display:grid;gap:14px}
label{display:block;font-weight:600;font-size:14px;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line-strong);background:#fff;border-radius:var(--r);padding:10px 12px;min-height:44px;color:var(--ink)}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--seal)}
.err{color:var(--seal);font-size:12px;margin-top:4px}
.check{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--muted)}
.check input{width:18px;height:18px;margin-top:3px;accent-color:var(--seal)}
.form-ok{padding:16px;border:1px solid var(--bronze);background:#F7F1E8;border-radius:var(--r);margin-bottom:12px}
.site-footer{background:var(--ink);color:#C9C0B4;padding:56px 0 120px}
.foot-grid{display:grid;grid-template-columns:1.3fr .9fr 1.1fr .9fr;gap:32px}
.site-footer h3{color:var(--ivory);font-size:16px}
.site-footer a{color:#E8E0D4}
.site-footer a:hover{color:#fff}
.foot-links{list-style:none}
.foot-links a{display:inline-flex;min-height:36px;align-items:center}
.icp{margin-top:32px;padding-top:20px;border-top:1px solid rgba(244,239,230,.12);font-size:13px;display:flex;flex-wrap:wrap;gap:8px 20px}
.legal{display:none;padding:16px;background:#1F1B18;border-radius:var(--r);margin-top:16px;font-size:13px;color:#B7AFA5}
.legal:target,.legal.open{display:block}
.dock{position:fixed;left:0;right:0;bottom:0;z-index:90;background:var(--ink);color:var(--ivory);display:flex;min-height:var(--bar);padding:8px 16px calc(8px + env(safe-area-inset-bottom,0px));gap:10px;justify-content:center;border-top:1px solid rgba(140,115,75,.35)}
.dock .btn{flex:1;max-width:280px}
.dock .btn-line{border-color:rgba(244,239,230,.45);color:var(--ivory)}
@media (max-width:1280px){h1{font-size:36px}h2{font-size:30px}}
@media (max-width:1024px){
  .nav-links,.nav-cta{display:none}
  .menu-toggle{display:flex;margin-left:auto}
  .drawer{display:block;position:fixed;inset:0;background:rgba(22,19,17,.5);opacity:0;pointer-events:none;transition:opacity .2s;z-index:90}
  .drawer.open{opacity:1;pointer-events:auto}
  .drawer nav{position:absolute;right:0;top:0;bottom:0;width:min(86vw,360px);background:var(--card);padding:24px 20px;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow-h)}
  .drawer a{min-height:44px;display:flex;align-items:center;color:var(--ink);padding:0 8px;border-bottom:1px solid var(--line)}
  .topbar-inner{overflow-x:auto;gap:20px}
  .split,.dark .container,.consult-grid{grid-template-columns:1fr;gap:28px}
  .hot-grid{grid-template-columns:1fr}
  .adv-grid,.cert-list,.story-grid,.reviews-grid,.team-grid{grid-template-columns:1fr 1fr}
  .news-grid{grid-template-columns:1fr 1fr}
  .process-steps{grid-template-columns:1fr 1fr}
  .guard-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .frame img{height:320px}
  .hero,.slides,.slide,.slide-inner{min-height:72vh}
}
@media (max-width:768px){
  h1,.hero h1,.slide h2.hero-title{font-size:26px}
  h2{font-size:24px}
  section{padding:56px 0}
  .points-grid,.scene-grid,.adv-grid,.cert-list,.story-grid,.reviews-grid,.news-grid,.team-grid,.compare-wrap,.process-steps,.guard-grid,.foot-grid{grid-template-columns:1fr}
  .point{border-right:0;border-bottom:1px solid var(--line)}
  .scene{grid-template-columns:1fr}
  .scene img{width:100%;height:180px}
  .stat{border-right:0;border-bottom:1px solid rgba(244,239,230,.12);min-width:50%}
  .slide-inner{padding:36px 0 96px}
  .hero-actions .btn{flex:1 1 160px}
}
@media (max-width:520px){
  .container,.nav-inner,.topbar-inner,.hero-ctrl{width:min(100% - 28px,var(--w))}
  .logo-text b{font-size:14px}
  .stat{min-width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}