/* roulang page: index */
:root{
  --ink:#191233;
  --ink-2:#221A3E;
  --gold:#C99A4B;
  --paper:#FAF7F0;
  --card:#FFFFFF;
  --line:#E4DDCD;
  --line-d:rgba(255,255,255,.10);
  --text:#2A2438;
  --text-d:#EDE7DA;
  --muted:#6E6779;
  --muted-d:#A9A2B8;
  --r:4px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.85;color:var(--text);background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none}
h1,h2,h3,.num,.brand-txt{font-family:var(--serif);font-weight:600;letter-spacing:.01em}
h1{font-size:clamp(30px,4.2vw,54px);line-height:1.18}
h2{font-size:24px;line-height:1.3}
h3{font-size:17px;line-height:1.45}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 28px}}
@media(min-width:1024px){.container{padding:0 32px}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:0 26px;border-radius:var(--r);
  font-size:15px;letter-spacing:.04em;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-gold{background:var(--gold);color:#241B10}
.btn-gold:hover{background:#B78A3E;transform:translateY(1px)}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:#241A4A;transform:translateY(1px)}
.btn-ghost{border-color:rgba(237,231,218,.38);color:var(--text-d)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn-line{border-color:var(--line);color:var(--text)}
.btn-line:hover{border-color:var(--gold);color:var(--gold)}
.btn:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* ---------- header ---------- */
.topbar{display:none;background:var(--ink);color:var(--muted-d);font-size:13px}
@media(min-width:1024px){.topbar{display:block}}
.topbar-in{display:flex;align-items:center;justify-content:space-between;gap:24px;height:36px}
.tick{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.topbar-tools{display:flex;gap:20px;flex:none}
.tool{font-size:13px;color:var(--muted-d);transition:color .18s ease}
.tool:hover{color:var(--gold)}

.navbar{position:sticky;top:0;z-index:60;background:var(--paper);border-bottom:1px solid var(--line);transition:border-color .2s ease}
.navbar.stuck{border-bottom-color:#CFC6B2}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
@media(min-width:1024px){.nav-in{height:72px}}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);flex:none}
.brand-mark{width:22px;height:22px;color:var(--gold)}
.brand-txt{font-size:17px;letter-spacing:.02em}
@media(min-width:1024px){.brand-txt{font-size:19px}}
.brand-txt i{font-style:normal;color:var(--gold);margin:0 3px}
.nav-links{display:none}
@media(min-width:1024px){.nav-links{display:flex;gap:28px}}
.nav-links a{position:relative;padding:6px 0;font-size:14px;font-weight:500;letter-spacing:.02em;transition:color .18s ease}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--gold);transform:scaleX(0);transition:transform .18s ease}
.nav-links a:hover{color:var(--gold)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-right .btn{display:none;min-height:40px;padding:0 20px;font-size:14px}
@media(min-width:768px){.nav-right .btn{display:inline-flex}}
.burger{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px}
@media(min-width:1024px){.burger{display:none}}
.burger span{display:block;width:20px;height:1px;background:var(--ink);transition:transform .2s ease,opacity .2s ease}
.burger[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

.scrim{position:fixed;inset:0;z-index:110;background:rgba(25,18,51,.55);opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease}
.scrim.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:120;width:min(300px,84vw);
  background:var(--ink);color:var(--text-d);padding:28px 24px;
  display:flex;flex-direction:column;transform:translateX(101%);transition:transform .24s ease;
}
.drawer.open{transform:none}
.drawer .brand{color:var(--text-d);margin-bottom:20px}
.drawer .brand-mark{color:var(--gold)}
.drawer nav{display:flex;flex-direction:column}
.d-link{padding:15px 0;border-bottom:1px solid var(--line-d);font-family:var(--serif);font-size:17px;transition:color .18s ease}
.d-link:hover{color:var(--gold)}
.drawer .btn{margin-top:auto;width:100%}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:var(--text-d);padding:48px 0 56px}
@media(min-width:768px){.hero{padding:64px 0 72px}}
@media(min-width:1024px){.hero{padding:88px 0 96px}}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.hero-in{position:relative;display:grid;gap:36px}
@media(min-width:1024px){.hero-in{grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.1em;color:var(--gold);
  border:1px solid rgba(201,154,75,.42);border-radius:999px;padding:5px 14px;line-height:1.4;
}
.hero h1{margin-top:20px}
.hero h1 em{font-style:normal;color:var(--gold);border-bottom:2px solid rgba(201,154,75,.45)}
.lead{margin-top:22px;max-width:560px;font-size:15px;line-height:1.9;color:var(--muted-d)}
@media(min-width:1024px){.lead{font-size:16px}}
.hero-points{margin-top:26px;display:grid;gap:10px}
.hero-points li{display:flex;gap:12px;align-items:baseline;font-size:14px;color:var(--text-d)}
.hero-points b{flex:none;font-family:var(--serif);font-size:13px;color:var(--gold);letter-spacing:.08em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-media{border:1px solid rgba(255,255,255,.14);border-radius:var(--r);overflow:hidden;aspect-ratio:16/10;background:var(--ink-2)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.countdown{
  display:flex;align-items:center;gap:16px;margin-top:16px;padding:14px 18px;
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r);
}
.ring{
  position:relative;flex:none;width:56px;height:56px;border-radius:50%;
  background:conic-gradient(var(--gold) 0 62%,rgba(255,255,255,.12) 0);
  display:grid;place-items:center;
}
.ring::after{content:"";position:absolute;inset:5px;border-radius:50%;background:var(--ink)}
.ring span{position:relative;z-index:1;font-family:var(--serif);font-size:16px;color:var(--gold)}
.cd-k{font-size:13px;color:var(--muted-d);line-height:1.5}
.cd-v{font-family:var(--serif);font-size:17px;color:var(--text-d);margin-top:4px}

/* ---------- filter bar ---------- */
.filterbar{background:var(--ink-2);color:var(--text-d);padding:16px 0;border-top:1px solid var(--line-d)}
.filter-in{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px}
.filter-label{font-size:13px;letter-spacing:.08em;color:var(--gold);flex:none}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{height:32px;padding:0 14px;border-radius:999px;border:1px solid rgba(255,255,255,.18);font-size:13px;color:var(--muted-d);transition:border-color .18s ease,color .18s ease,background .18s ease}
.chip:hover{border-color:var(--gold);color:var(--gold)}
.chip.is-on{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.chip.is-on:hover{color:var(--ink);border-color:var(--paper)}
.selects{display:flex;flex-wrap:wrap;gap:10px}
.selects select{
  height:32px;padding:0 10px;font-size:13px;border-radius:var(--r);
  border:1px solid rgba(255,255,255,.18);background:transparent;color:var(--muted-d);
}
.selects select:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.selects option{background:var(--ink);color:var(--text-d)}
.filterbar .btn{min-height:32px;padding:0 16px;font-size:13px;margin-left:auto}

/* ---------- generic section ---------- */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:80px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.section.alt{background:var(--card)}
.sec-head{margin-bottom:32px;max-width:660px}
@media(min-width:1024px){.sec-head{margin-bottom:40px}}
.sec-head .num{
  display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--gold);
  padding-left:10px;border-left:2px solid var(--gold);line-height:1;margin-bottom:14px;
}
.sec-sub{margin-top:10px;font-size:14px;line-height:1.8;color:var(--muted)}

/* ---------- capabilities ---------- */
.split{display:grid;gap:32px}
@media(min-width:1024px){.split{grid-template-columns:4fr 8fr;gap:56px}}
.feature-list{display:grid}
@media(min-width:768px){.feature-list{grid-template-columns:1fr 1fr;column-gap:40px}}
.feature-list li{border-top:1px solid var(--line);padding:20px 0}
.fnum{font-family:var(--serif);font-size:13px;color:var(--gold);letter-spacing:.1em}
.feature-list h3{margin:6px 0 8px}
.feature-list p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- library ---------- */
.lib-grid{display:grid;gap:20px}
.lib-grid+.lib-grid{margin-top:20px}
@media(min-width:768px){.lib-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){
  .lib-top{grid-template-columns:1.15fr 1.15fr .7fr}
  .lib-bottom{grid-template-columns:repeat(3,1fr)}
}
.lib-card{
  display:flex;flex-direction:column;overflow:hidden;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r);
  transition:border-color .2s ease,transform .2s ease;
}
.lib-card:hover{border-color:var(--gold);transform:translateY(-2px)}
.lib-media{aspect-ratio:16/9;overflow:hidden;background:#EFE9DD}
.lib-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.lib-card:hover .lib-media img{transform:scale(1.02)}
.lib-body{padding:18px 20px 22px}
.lib-meta{font-family:var(--serif);font-size:12px;letter-spacing:.1em;color:var(--gold)}
.lib-body h3{margin:6px 0 8px;font-size:18px}
.lib-body p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- ongoing ---------- */
.prog-list{display:grid;gap:24px}
@media(min-width:768px){.prog-list{grid-template-columns:repeat(3,1fr);gap:32px}}
.prog{border-top:1px solid var(--line);padding-top:20px}
.prog header{display:flex;align-items:baseline;gap:10px;margin-bottom:16px}
.prog header .num{font-size:13px;letter-spacing:.1em;color:var(--gold)}
.prog h3{flex:1;font-size:17px}
.prog em{font-style:normal;font-family:var(--serif);font-size:15px;color:var(--gold)}
.bar{height:3px;border-radius:999px;background:#E9E2D2;overflow:hidden}
.bar span{display:block;height:100%;border-radius:999px;background:var(--gold)}
.w68{width:68%}.w45{width:45%}.w82{width:82%}
.prog p{margin-top:14px;font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- scenes ---------- */
.scene-grid{display:grid;gap:20px}
@media(min-width:768px){.scene-grid{grid-template-columns:1fr 1fr;gap:24px}}
@media(min-width:1024px){.scene-grid{gap:28px 32px}}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:border-color .2s ease}
.scene:hover{border-color:var(--gold)}
@media(min-width:768px){.scene:nth-child(2),.scene:nth-child(4){margin-top:36px}}
.scene .media{aspect-ratio:3/2;overflow:hidden;background:#EFE9DD}
.scene .media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.scene:hover .media img{transform:scale(1.02)}
.scene-body{padding:18px 20px 22px}
.scene-body h3{margin-bottom:8px}
.scene-body p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- shots ---------- */
.shots{display:grid;gap:16px}
@media(min-width:768px){.shots{grid-template-columns:1fr 1fr;gap:20px}}
.shot-main{grid-column:1/-1}
.shot-frame{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:8px}
.shot-frame img{width:100%;object-fit:cover;border-radius:2px}
.shot-main .shot-frame img{aspect-ratio:16/9}
.shot .shot-frame img{aspect-ratio:16/10}
.shot-cap{display:flex;gap:10px;padding:12px 4px 0;font-size:13px;line-height:1.7;color:var(--muted)}
.shot-cap b{flex:none;font-family:var(--serif);color:var(--gold);font-weight:600;letter-spacing:.08em}

/* ---------- compare ---------- */
.cmp{font-size:14px}
.cmp thead{display:none}
.cmp tbody,.cmp tr,.cmp td{display:block}
.cmp tr{background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin-bottom:12px;padding:6px 0}
.cmp td{display:flex;justify-content:space-between;gap:16px;padding:8px 16px;font-size:14px}
.cmp td::before{content:attr(data-l);color:var(--muted);font-size:13px}
.cmp td:first-child{
  font-family:var(--serif);font-size:16px;color:var(--ink);
  border-bottom:1px solid var(--line);margin-bottom:6px;padding-bottom:10px;
}
.cmp td:first-child::before{content:none}
.cmp .yes{color:var(--gold)}
@media(min-width:768px){
  .cmp{display:table;width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line)}
  .cmp thead{display:table-header-group}
  .cmp tbody{display:table-row-group}
  .cmp tr{display:table-row;border:0;border-radius:0;margin:0;padding:0;background:transparent}
  .cmp th,.cmp td{display:table-cell;padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
  .cmp td::before{content:none}
  .cmp td:first-child{font-family:inherit;font-size:14px;color:var(--muted);border-bottom:1px solid var(--line);margin:0;padding:14px 18px}
  .cmp thead th{background:var(--ink);color:var(--text-d);font-weight:500;letter-spacing:.04em;border-bottom:0}
  .cmp tbody tr:last-child td{border-bottom:0}
}

/* ---------- roadmap ---------- */
.roadmap{margin-left:8px;border-left:1px solid var(--line)}
.road{position:relative;padding:0 0 28px 24px}
.road:last-child{padding-bottom:0}
.road::before{content:"";position:absolute;left:-4px;top:8px;width:7px;height:7px;border-radius:50%;background:var(--gold)}
.road .num{font-size:13px;letter-spacing:.1em;color:var(--gold)}
.road h3{margin:4px 0 8px}
.road p{font-size:14px;line-height:1.75;color:var(--muted);max-width:720px}

/* ---------- stats ---------- */
.stats{background:var(--ink);color:var(--text-d);padding:36px 0}
@media(min-width:768px){.stats{padding:48px 0}}
.stat-grid{display:grid;grid-template-columns:1fr 1fr}
@media(min-width:1024px){.stat-grid{grid-template-columns:repeat(4,1fr)}}
.stat{padding:14px 16px;border-left:1px solid var(--line-d)}
.stat b{display:block;font-family:var(--serif);font-size:30px;line-height:1.1;color:var(--gold)}
@media(min-width:768px){.stat b{font-size:34px}}
.stat span{display:block;margin-top:8px;font-size:13px;line-height:1.6;color:var(--muted-d)}

/* ---------- wall ---------- */
.wall{display:grid;gap:16px}
@media(min-width:768px){.wall{grid-template-columns:1fr 1fr;gap:20px}}
.quote{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
@media(min-width:768px){.quote:nth-child(2n){margin-top:24px}}
.quote p{font-size:14px;line-height:1.8}
.quote footer{margin-top:12px;display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--muted)}
.quote footer b{font-weight:500;font-family:var(--serif);color:var(--ink)}

/* ---------- changelog ---------- */
.log{display:grid}
.log-item{padding:18px 0;border-bottom:1px solid var(--line)}
.log-item:first-child{border-top:1px solid var(--line)}
@media(min-width:768px){.log-item{display:grid;grid-template-columns:120px 1fr;gap:32px;align-items:baseline}}
.log-item time{font-family:var(--serif);font-size:13px;letter-spacing:.06em;color:var(--gold)}
.log-item h3{font-size:16px;margin-bottom:6px}
.log-item p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- news ---------- */
.news{display:grid}
.news-item{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);transition:background .18s ease}
.news-item:first-child{border-top:1px solid var(--line)}
.news-item:hover{background:rgba(201,154,75,.06)}
.news-item img{width:96px;height:64px;object-fit:cover;border-radius:var(--r);border:1px solid var(--line)}
.news-item h3{font-size:15px;line-height:1.55;transition:color .18s ease}
.news-item:hover h3{color:var(--gold)}
.news-item p{margin-top:4px;font-size:13px;line-height:1.6;color:var(--muted);overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.news-item time{display:block;margin-top:6px;font-family:var(--serif);font-size:12px;color:var(--muted)}
.more{display:inline-flex;align-items:center;gap:6px;margin-top:24px;font-size:14px;color:var(--ink);border-bottom:1px solid var(--gold);padding-bottom:2px;transition:color .18s ease}
.more:hover{color:var(--gold)}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);max-width:900px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:15px;font-weight:600;line-height:1.6;cursor:pointer;
  list-style:none;transition:color .18s ease,box-shadow .18s ease,padding-left .18s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;font-family:var(--serif);font-size:19px;font-weight:400;color:var(--gold);line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{box-shadow:inset 3px 0 0 var(--gold);padding-left:14px;color:var(--gold)}
.faq details p{padding:0 0 18px;font-size:14px;line-height:1.85;color:var(--muted);max-width:760px}
.faq details[open] p{padding-left:14px}

/* ---------- cta / subscribe ---------- */
.cta{position:relative;overflow:hidden;background:var(--ink);color:var(--text-d);padding:56px 0 64px}
@media(min-width:768px){.cta{padding:72px 0 80px}}
@media(min-width:1024px){.cta{padding:88px 0 96px}}
.cta-bg{position:absolute;inset:0;background:url(/assets/images/0cbc03a209bf8319.jpg) center/cover no-repeat;opacity:.16}
.cta::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(circle,rgba(255,255,255,.05) 1px,transparent 1px);background-size:22px 22px}
.cta-in{position:relative;z-index:1;display:grid;gap:36px}
@media(min-width:1024px){.cta-in{grid-template-columns:1fr 1fr;gap:64px;align-items:start}}
.cta h2{font-size:26px;line-height:1.35}
@media(min-width:768px){.cta h2{font-size:32px}}
.cta h2 em{font-style:normal;color:var(--gold)}
.cta .cta-desc{margin-top:16px;font-size:15px;line-height:1.85;color:var(--muted-d);max-width:520px}
.cta-tips{margin-top:22px;display:grid;gap:8px}
.cta-tips li{font-size:13px;color:var(--muted-d);display:flex;gap:10px}
.cta-tips li::before{content:"—";color:var(--gold)}
.subs{display:grid;gap:20px}
.subs label{display:block;font-size:13px;letter-spacing:.04em;color:var(--muted-d)}
.subs input{
  width:100%;margin-top:6px;padding:10px 0;font-size:15px;font-family:inherit;
  background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.24);
  color:var(--text-d);transition:border-color .18s ease;
}
.subs input::placeholder{color:rgba(169,162,184,.7);font-size:14px}
.subs input:focus{outline:none;border-bottom-color:var(--gold)}
.subs .btn{width:100%}
.subs .privacy{font-size:12px;line-height:1.7;color:var(--muted-d)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--muted-d);padding:56px 0 24px;font-size:13px;line-height:1.8}
.foot-grid{display:grid;gap:32px}
@media(min-width:768px){.foot-grid{grid-template-columns:1fr 1fr;gap:36px}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.foot-brand .brand{color:var(--text-d);margin-bottom:14px}
.foot-brand p{max-width:300px}
.foot-star{width:18px;height:18px;color:var(--gold);margin-top:16px}
.site-footer h3{font-size:14px;color:var(--text-d);margin-bottom:14px;letter-spacing:.04em}
.site-footer ul{display:grid;gap:10px}
.site-footer ul a{transition:color .18s ease}
.site-footer ul a:hover{color:var(--gold)}
@media(min-width:1024px){
  .foot-col{padding-left:28px;border-left:1px solid var(--line-d)}
}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line-d);display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:12px;color:var(--muted-d)}

/* ---------- mobile action bar ---------- */
.mbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 16px;background:var(--ink);color:var(--text-d);
  border-top:1px solid var(--line-d);
  transform:translateY(101%);transition:transform .24s ease;
}
.mbar.show{transform:none}
.mbar p{font-size:13px;line-height:1.4}
.mbar p b{font-family:var(--serif);color:var(--gold);font-size:15px}
.mbar .btn{min-height:40px;padding:0 20px;font-size:14px}
@media(min-width:768px){.mbar{display:none}}
@media(max-width:768px){.site-footer{padding-bottom:80px}}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}

/* roulang page: index */
:root{
  --ink:#2E1F42;
  --deep:#1B1229;
  --amber:#D98E2B;
  --amber-h:#E8A93F;
  --mint:#4FB6A5;
  --bg:#F7F3EC;
  --card:#FFFFFF;
  --line:#E4DCCE;
  --text:#2B2632;
  --muted:#6B6478;
  --dtext:#F3EEE4;
  --dmuted:#BDB2C6;
  --r:12px;
  --rb:8px;
  --sh:0 2px 10px rgba(46,31,66,.06);
  --shh:0 8px 22px rgba(46,31,66,.10);
}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:16px;line-height:1.75;-webkit-text-size-adjust:100%}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul{margin:0}
h2{font-size:clamp(26px,3vw,34px);line-height:1.3;font-weight:700;color:var(--ink)}
h2::after{content:"";display:block;width:44px;height:3px;background:var(--amber);border-radius:2px;margin-top:14px}
h3{font-size:20px;line-height:1.4;font-weight:600;color:var(--ink)}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:88px 0}
.section.alt{background:var(--card)}
.deep{background:var(--deep);color:var(--dtext)}
.deep h2{color:var(--dtext)}
.sec-head{max-width:780px;margin-bottom:32px}
.sec-desc{font-size:17px;line-height:1.8;color:var(--muted);margin-top:14px}
.deep .sec-desc{color:var(--dmuted)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;border-radius:var(--rb);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;background:none;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.btn-primary{background:var(--ink);color:var(--bg)}
.btn-primary:hover{background:var(--amber);color:var(--deep);transform:translateY(-2px);box-shadow:var(--shh)}
.btn-outline{background:#fff;border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:var(--bg);transform:translateY(-2px)}
.btn-amber{background:var(--amber);color:var(--deep)}
.btn-amber:hover{background:var(--amber-h);transform:translateY(-2px);box-shadow:0 8px 22px rgba(217,142,43,.28)}
.btn-ghost{background:transparent;border-color:rgba(243,238,228,.35);color:var(--dtext)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber-h);transform:translateY(-2px)}
.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;background:rgba(217,142,43,.12);color:#A9661A;font-size:13px;line-height:1.6}
/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.scrolled{box-shadow:0 4px 14px rgba(46,31,66,.06)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;transition:height .2s ease}
.site-header.scrolled .container{height:60px}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.5px;color:var(--ink);white-space:nowrap}
.brand svg{flex:none}
.nav{display:flex;align-items:center;gap:26px}
.nav a{position:relative;font-size:15px;color:var(--ink);padding:6px 0}
.nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--amber);transition:width .18s ease}
.nav a:hover::after,.nav a.on::after{width:100%}
.head-right{display:flex;align-items:center;gap:16px}
.login{font-size:13px;color:var(--muted);transition:color .18s ease}
.login:hover{color:var(--ink)}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--rb);background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}
.burger span{display:block;width:18px;height:2px;background:var(--ink)}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);background:#fff;z-index:90;transform:translateX(100%);transition:transform .25s ease;padding:18px 20px 28px;display:flex;flex-direction:column;overflow-y:auto}
.drawer.open{transform:translateX(0)}
.drawer-mask{position:fixed;inset:0;background:rgba(27,18,41,.5);z-index:80;opacity:0;pointer-events:none;transition:opacity .25s ease}
.drawer-mask.open{opacity:1;pointer-events:auto}
.dclose{align-self:flex-end;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--rb);background:#fff;font-size:20px;line-height:1;cursor:pointer;color:var(--muted)}
.dnav{display:flex;flex-direction:column;margin-top:14px}
.dnav a{display:flex;align-items:center;height:52px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line)}
.dnav a:last-child{border-bottom:0}
.drawer .btn{width:100%;margin-top:20px}
/* hero */
.hero{background:var(--deep);color:var(--dtext);border-bottom:3px solid var(--amber)}
.hero .container{padding-top:72px;padding-bottom:72px}
.hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:center}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.hero-tags .tag{background:rgba(79,182,165,.14);color:#8FDCCD}
.hero h1{font-size:clamp(32px,4.2vw,52px);line-height:1.2;font-weight:700;color:#fff;margin:18px 0 20px}
.hero-sub{font-size:17px;line-height:1.8;color:var(--dmuted);max-width:560px}
.hero-points{display:flex;flex-wrap:wrap;gap:8px 22px;list-style:none;padding:0;margin:20px 0 26px;font-size:13px;color:var(--dmuted)}
.hero-points li::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--amber);margin-right:8px;vertical-align:middle}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-count{display:flex;align-items:center;gap:14px;margin-top:30px;padding-top:24px;border-top:1px solid rgba(243,238,228,.14)}
.ring{width:58px;height:58px;flex:none;border-radius:50%;background:conic-gradient(var(--amber) 72%,rgba(217,142,43,.18) 0);display:grid;place-items:center;position:relative}
.ring::after{content:"";position:absolute;inset:5px;border-radius:50%;background:var(--deep)}
.ring b{position:relative;font-size:18px;color:var(--amber-h);font-variant-numeric:tabular-nums}
.hero-count p{font-size:13px;line-height:1.6;color:var(--dmuted)}
.hero-count strong{display:block;font-size:14px;color:var(--dtext);margin-bottom:2px}
.hero-figure{position:relative}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--rb)}
.hero-stat{position:absolute;right:-8px;bottom:-8px;background:#241833;border:1px solid rgba(243,238,228,.22);border-radius:10px;padding:12px 18px;text-align:right}
.hero-stat strong{display:block;font-size:28px;line-height:1.15;color:var(--amber);font-variant-numeric:tabular-nums}
.hero-stat span{font-size:13px;color:var(--dmuted)}
/* stats */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:34px 20px;text-align:center;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat strong{display:block;font-size:30px;line-height:1.2;color:var(--amber);font-weight:700;font-variant-numeric:tabular-nums}
.stat span{display:block;font-size:13px;color:var(--muted);margin-top:6px}
/* features */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;transition:box-shadow .18s ease,transform .18s ease}
.feature:hover{box-shadow:var(--shh);transform:translateY(-2px)}
.feature .num{font-size:13px;font-weight:600;letter-spacing:1px;color:var(--amber);font-variant-numeric:tabular-nums}
.feature svg{margin:14px 0 10px;color:var(--ink)}
.feature h3{font-size:18px;margin-bottom:8px}
.feature p{font-size:14px;line-height:1.7;color:var(--muted)}
.feature .bar{width:24px;height:2px;background:var(--amber);margin-top:18px;transition:width .18s ease}
.feature:hover .bar{width:48px}
/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:40px 0}
.split:first-child{padding-top:0}
.split+.split{border-top:1px solid var(--line)}
.split.rev .split-media{order:2}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--rb);border:1px solid var(--line)}
.split h3{margin:14px 0 12px}
.split ul{list-style:none;padding:0;display:grid;gap:10px;margin-bottom:18px}
.split li{position:relative;padding-left:18px;font-size:15px;line-height:1.7;color:var(--muted)}
.split li::before{content:"";position:absolute;left:0;top:11px;width:10px;height:1px;background:var(--amber)}
.more{display:inline-block;font-size:14px;font-weight:600;color:var(--ink);border-bottom:2px solid var(--amber);padding-bottom:2px;transition:color .18s ease}
.more:hover{color:var(--mint)}
/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.scene:hover{transform:translateY(-2px);box-shadow:var(--shh)}
.scene img{width:100%;aspect-ratio:3/2;object-fit:cover}
.scene div{padding:18px 20px 22px}
.scene h3{font-size:17px;margin-bottom:8px;transition:color .18s ease}
.scene:hover h3{color:var(--amber)}
.scene p{font-size:14px;line-height:1.7;color:var(--muted)}
/* demo */
.tabs{display:flex;gap:28px;border-bottom:1px solid var(--line);margin-bottom:28px;overflow-x:auto}
.tab{position:relative;background:none;border:0;padding:0 0 14px;min-height:44px;font-size:15px;color:var(--muted);white-space:nowrap;cursor:pointer;transition:color .18s ease}
.tab.on{color:var(--ink);font-weight:600}
.tab.on::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:var(--amber)}
.demo-panel{display:none;grid-template-columns:2fr 3fr;gap:40px;align-items:center}
.demo-panel.on{display:grid}
.demo-panel h3{margin-bottom:10px}
.demo-panel p{font-size:15px;line-height:1.75;color:var(--muted);margin-bottom:14px}
.demo-panel ul{list-style:none;padding:0;display:grid;gap:9px}
.demo-panel li{position:relative;padding-left:18px;font-size:14px;color:var(--muted)}
.demo-panel li::before{content:"";position:absolute;left:0;top:10px;width:10px;height:1px;background:var(--amber)}
.demo-shot img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--rb);border:1px solid var(--line);box-shadow:var(--sh)}
/* channels */
.channels{border-top:1px solid var(--line)}
.channel{display:grid;grid-template-columns:56px 1fr auto;align-items:center;gap:16px;height:64px;padding:0 16px;border-bottom:1px solid var(--line);transition:background .18s ease}
.channel:hover{background:var(--bg)}
.channel .cnum{font-size:13px;font-weight:600;color:var(--amber);font-variant-numeric:tabular-nums}
.channel h3{font-size:16px}
.channel .cmeta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--muted)}
.channel .arw{color:var(--amber);transition:transform .18s ease}
.channel:hover .arw{transform:translateX(4px)}
/* records */
.recs{display:grid}
.rec{display:grid;grid-template-columns:64px 1fr 200px;gap:24px;align-items:center;padding:26px 0;border-bottom:1px solid var(--line)}
.rec:first-child{border-top:1px solid var(--line)}
.rec .rnum{font-size:34px;line-height:1;font-weight:700;color:var(--amber);font-variant-numeric:tabular-nums}
.rec h3{font-size:18px;margin-bottom:8px}
.rec p{font-size:14px;line-height:1.7;color:var(--muted);margin-bottom:8px}
.rec .rmeta{font-size:13px;color:var(--muted)}
.rec img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--rb)}
/* pricing */
.price-note{font-size:13px;color:var(--muted);margin-top:10px}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.plan{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 24px;transition:box-shadow .18s ease,transform .18s ease}
.plan:hover{box-shadow:var(--shh);transform:translateY(-2px)}
.plan.recommend{background:var(--ink);border-color:var(--ink);color:var(--dtext)}
.plan .ptag{font-size:13px;color:var(--muted)}
.plan.recommend .ptag{color:var(--dmuted)}
.plan .price{font-size:38px;line-height:1.1;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;margin:10px 0 4px}
.plan.recommend .price{color:#fff}
.plan .price small{font-size:13px;font-weight:400;color:var(--muted);margin-left:4px}
.plan.recommend .price small{color:var(--dmuted)}
.plan .pdesc{font-size:13px;color:var(--muted)}
.plan.recommend .pdesc{color:var(--dmuted)}
.plan ul{list-style:none;padding:0;margin:20px 0 24px;display:grid}
.plan li{font-size:14px;padding:11px 0;border-top:1px solid var(--line);color:var(--muted)}
.plan.recommend li{border-color:rgba(243,238,228,.16);color:var(--dmuted)}
.plan .btn{width:100%;margin-top:auto}
/* wall */
.wall{columns:2;column-gap:20px}
.quote{break-inside:avoid;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:20px}
.quote p{font-size:15px;line-height:1.8;color:var(--text);margin-bottom:16px}
.qfoot{display:flex;align-items:center;gap:10px}
.avatar{width:40px;height:40px;flex:none;border-radius:50%;background:rgba(46,31,66,.08);color:var(--ink);display:grid;place-items:center;font-size:15px;font-weight:600}
.qname{font-size:13px;color:var(--muted)}
.qtag{margin-left:auto}
/* voice */
.voice{background:#fff;text-align:center}
.voice .sec-head{margin:0 auto 28px}
.voice .sec-head h2::after{margin-left:auto;margin-right:auto}
.voice-lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:720px;margin:0 auto 30px}
.voice-row{display:flex;justify-content:center;flex-wrap:wrap}
.voice-item{padding:0 28px;position:relative}
.voice-item+.voice-item::before{content:"·";position:absolute;left:-4px;top:4px;font-size:20px;color:var(--line)}
.voice-item strong{display:block;font-size:28px;line-height:1.2;color:var(--ink);font-variant-numeric:tabular-nums}
.voice-item span{font-size:13px;color:var(--muted)}
/* team */
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.member{text-align:center}
.member img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:var(--rb);transition:transform .18s ease}
.member:hover img{transform:scale(1.02)}
.member h3{font-size:16px;margin:14px 0 4px}
.member .role{font-size:13px;color:var(--amber)}
.member .bio{font-size:12px;line-height:1.6;color:var(--muted);margin-top:6px}
/* news */
.news-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:40px}
.lead-news img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--rb);margin-bottom:16px}
.lead-news h3{font-size:20px;margin:12px 0 10px}
.lead-news p{font-size:14px;line-height:1.8;color:var(--muted);margin-bottom:10px}
.lead-news time{font-size:13px;color:var(--muted)}
.nlist{display:grid}
.nitem{display:flex;justify-content:space-between;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}
.nitem:first-child{border-top:1px solid var(--line)}
.nitem h3{font-size:15px;font-weight:600;line-height:1.6;transition:color .18s ease}
.nitem:hover h3{color:var(--amber)}
.nitem time{flex:none;font-size:13px;color:var(--muted);white-space:nowrap}
/* faq */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;padding:20px 0 20px 16px;border-left:3px solid transparent;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;transition:border-color .18s ease}
.faq summary::-webkit-details-marker{display:none}
.faq details[open] summary{border-left-color:var(--amber)}
.faq summary::after{content:"";flex:none;width:14px;height:14px;background:linear-gradient(var(--amber),var(--amber)) 0 6px/14px 2px no-repeat,linear-gradient(var(--amber),var(--amber)) 6px 0/2px 14px no-repeat;transition:background .18s ease}
.faq details[open] summary::after{background:linear-gradient(var(--amber),var(--amber)) 0 6px/14px 2px no-repeat}
.faq .ans{padding:0 32px 20px 19px;font-size:15px;line-height:1.8;color:var(--muted)}
/* cta */
.cta{background:var(--deep);color:var(--dtext);border-bottom:3px solid var(--amber);padding:80px 0}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.cta h2{color:#fff}
.cta .cdesc{font-size:15px;color:var(--dmuted);margin-top:14px}
.cta ul{list-style:none;padding:0;margin-top:20px;display:grid;gap:10px;font-size:13px;color:var(--dmuted)}
.cta li::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--amber);margin-right:8px;vertical-align:middle}
.form{display:grid;gap:12px}
.form label{font-size:13px;color:var(--dmuted)}
.form input{width:100%;height:48px;padding:0 14px;border-radius:var(--rb);border:1px solid rgba(243,238,228,.2);background:#fff;color:var(--text);font-size:15px}
.form input:focus{outline:2px solid var(--mint);outline-offset:-1px;border-color:transparent}
.form .btn{width:100%}
.form .note{font-size:13px;line-height:1.6;color:var(--dmuted)}
/* footer */
.site-footer{background:var(--deep);color:var(--dmuted);padding:64px 0 0}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:48px}
.f-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.5px;color:#fff}
.f-desc{font-size:13px;line-height:1.8;margin:14px 0 16px;max-width:280px}
.socials{display:flex;gap:10px}
.socials a{width:34px;height:34px;border-radius:50%;border:1px solid rgba(243,238,228,.2);display:grid;place-items:center;color:var(--dmuted);transition:border-color .18s ease,color .18s ease}
.socials a:hover{border-color:var(--amber);color:var(--amber)}
.f-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.f-col a{display:block;font-size:13px;padding:7px 0;color:var(--dmuted);transition:color .18s ease}
.f-col a:hover{color:var(--amber-h)}
.f-form{display:flex;gap:8px;margin-bottom:10px}
.f-form input{flex:1;min-width:0;height:48px;padding:0 12px;border-radius:var(--rb);border:1px solid rgba(243,238,228,.2);background:#fff;color:var(--text);font-size:14px}
.f-form input:focus{outline:2px solid var(--mint);outline-offset:-1px;border-color:transparent}
.f-form .btn{height:48px;padding:0 18px}
.f-note{font-size:12px;line-height:1.6;color:var(--dmuted)}
.f-bottom{border-top:1px solid #3A2C50;padding:20px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--dmuted)}
.f-bottom nav{display:flex;gap:18px}
.f-bottom a:hover{color:var(--amber-h)}
@media (max-width:1024px){
  .section{padding:64px 0}
  .hero .container{padding-top:56px;padding-bottom:56px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-figure{max-width:620px}
  .nav,.head-right{display:none}
  .burger{display:flex}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .team-grid{grid-template-columns:repeat(2,1fr)}
  .demo-panel{grid-template-columns:1fr;gap:24px}
  .demo-panel .demo-shot{order:-1}
  .news-grid{grid-template-columns:1fr;gap:32px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .split{gap:32px}
  .f-grid{grid-template-columns:1fr 1fr;gap:32px}
  .f-brand-col{grid-column:1/-1}
}
@media (max-width:768px){
  .section{padding:48px 0}
  .hero .container{padding-top:44px;padding-bottom:44px}
  .hero-stat{right:8px;bottom:8px;padding:10px 14px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:0;border-top:1px solid var(--line);padding:26px 16px}
  .stat:nth-child(-n+2){border-top:0}
  .stat:nth-child(even){border-left:1px solid var(--line)}
  .split{grid-template-columns:1fr;gap:24px;padding:32px 0}
  .split.rev .split-media{order:0}
  .price-grid{grid-template-columns:1fr}
  .plan.recommend{order:-1}
  .wall{columns:1}
  .rec{grid-template-columns:48px 1fr;gap:16px}
  .rec img{grid-column:1/-1;max-width:240px}
  .rec .rnum{font-size:28px}
  .channel{height:auto;padding:16px;grid-template-columns:44px 1fr;row-gap:6px}
  .channel .cmeta{grid-column:2;justify-content:space-between}
  .voice-item{padding:0 16px}
  .voice-item+.voice-item::before{display:none}
  .voice-row{gap:20px}
  .f-grid{grid-template-columns:1fr}
  .f-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:15px}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .feature-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .team-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .tabs{gap:20px}
  .faq summary{font-size:16px}
  .f-form{flex-direction:column}
  .f-form .btn{width:100%}
  .sec-desc{font-size:15px}
}