/* roulang page: index */
*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#1B1A2E;--gold:#C9A227;--bg:#F7F5F0;--card:#FFFFFF;
  --text:#1A1A1A;--sub:#6B6B6B;--line:#E4E0D8;--star:#8C6A1F;
  --r:6px;--rs:4px;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.8 "PingFang SC","HarmonyOS Sans","Source Han Sans SC",system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased}
img{display:block;width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
em{font-style:normal}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.ico{display:block;flex:none}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;border:1px solid transparent;border-radius:var(--rs);font-size:15px;font-weight:600;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;cursor:pointer}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--gold);color:var(--ink)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn-line{border-color:var(--line);color:var(--ink);min-height:38px;padding:0 16px;font-size:13px;font-weight:600}
.btn-line:hover{border-color:var(--gold);color:var(--gold)}
.btn:focus-visible,.nav a:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* header */
.hd{position:sticky;top:0;z-index:30;background:var(--bg);border-bottom:1px solid var(--line)}
.hd-top{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:36px;height:36px;border-radius:var(--rs);background:var(--gold);color:var(--ink);font-size:11px;font-weight:700;line-height:1.1;display:grid;place-items:center;text-align:center;letter-spacing:0}
.bname{font-size:16px;font-weight:700;letter-spacing:-.01em}
.nav{display:flex;flex-wrap:wrap;gap:4px 26px;padding-top:2px;padding-bottom:12px}
.nav a{position:relative;display:inline-flex;align-items:center;gap:7px;min-height:44px;font-size:13px;color:var(--sub);transition:color .18s ease-out}
.nav a::after{content:"";position:absolute;left:0;bottom:8px;width:0;height:1px;background:var(--gold);transition:width .22s ease-out}
.nav a:hover,.nav a.on{color:var(--ink)}
.nav a:hover::after,.nav a.on::after{width:100%}
.nav a:hover .ico,.nav a.on .ico{color:var(--gold)}
.ico{color:inherit}

/* base section */
section{padding:88px 0;scroll-margin-top:132px}
.alt{background:var(--card)}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.18em;color:var(--gold)}
.sec-h{font-size:clamp(24px,3vw,38px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.sec-h::before{content:"";display:block;width:28px;height:2px;background:var(--gold);margin-bottom:14px;transition:width .3s ease-out}
.sec-h:hover::before{width:56px}
.sec-p{max-width:720px;margin:14px 0 32px;font-size:15px;color:var(--sub)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* hero */
.hero{position:relative;overflow:hidden;padding:72px 0 88px}
.hero::before{content:"";position:absolute;inset:0;background:url("/assets/images/backpic/back-1.jpg") center/cover no-repeat;opacity:.13;pointer-events:none}
.hero>.wrap{position:relative}
.hero .eyebrow{display:block;text-align:center}
h1{max-width:17em;margin:14px auto 0;font-size:clamp(30px,4.4vw,56px);line-height:1.1;font-weight:700;letter-spacing:-.02em;text-align:center}
h1 em{color:var(--gold)}
.lede{max-width:760px;margin:20px auto 0;font-size:16px;color:var(--sub);text-align:center}
.stage{display:grid;grid-template-columns:1fr 400px 1fr;gap:32px;align-items:center;margin-top:48px}
.side{display:grid;gap:20px}
.side li{border-left:2px solid var(--gold);padding-left:14px}
.side b{display:block;font-size:15px;font-weight:600}
.side span{display:block;margin-top:2px;font-size:13px;line-height:1.7;color:var(--sub)}
.side.right{text-align:right}
.side.right li{border-left:0;border-right:2px solid var(--gold);padding:0 14px 0 0}
.shot img{aspect-ratio:4/5;object-fit:cover;border-radius:var(--r);border:1px solid var(--line)}
.shot figcaption{margin-top:12px;padding-top:10px;border-top:1px solid var(--gold);font-size:12px;letter-spacing:.06em;color:var(--sub)}
.acts{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:40px}

/* pains */
.pains{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.pains li{border-right:1px solid var(--line);padding:26px 24px 0 0}
.pains li+li{padding-left:24px}
.pains li:last-child{border-right:0;padding-right:0}
.num{display:block;margin-bottom:12px;font-family:Georgia,"Noto Serif SC",serif;font-size:40px;line-height:1;color:var(--gold)}
.pains h3{margin-bottom:6px;font-size:16px;font-weight:600}
.pains p{font-size:14px;line-height:1.75;color:var(--sub)}

/* solution */
.sol{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.dots li{margin-bottom:22px;border-left:2px solid var(--gold);padding-left:16px}
.dots li:last-child{margin-bottom:0}
.dots b{display:block;font-size:16px;font-weight:600}
.dots span{display:block;margin-top:4px;font-size:14px;line-height:1.75;color:var(--sub)}
.sol-fig{margin-top:40px}
.sol-fig img{aspect-ratio:16/9;object-fit:cover;border-radius:var(--r);border:1px solid var(--line)}
.text-link{display:inline-block;margin-top:28px;padding-bottom:2px;font-size:14px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--gold);transition:color .18s ease-out}
.text-link:hover{color:var(--gold)}

/* cards */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out}
.card:hover{transform:translateY(-2px);border-color:var(--gold);box-shadow:0 0 0 1px var(--gold)}
.card img{aspect-ratio:3/4;object-fit:cover}
.card-b{padding:14px 16px 18px}
.card-b h3{font-size:15px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:8px;font-size:12px;color:var(--sub)}
.tag{border:1px solid var(--line);border-radius:999px;padding:0 8px;font-size:11px;line-height:18px;color:var(--sub)}

/* hot */
.hot{display:grid;gap:12px}
.hot li{display:grid;grid-template-columns:112px 1fr;gap:16px;align-items:center;padding:10px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);transition:transform .18s ease-out,border-color .18s ease-out}
.hot li:hover{transform:translateY(-2px);border-color:var(--gold)}
.hot img{width:112px;height:112px;object-fit:cover;border-radius:var(--rs)}
.hot h3{font-size:15px;font-weight:600}
.hot .meta{margin-top:6px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;border-top:1px solid var(--line);padding-top:36px}
.steps b{display:block;font-family:Georgia,"Noto Serif SC",serif;font-size:44px;line-height:1;color:var(--gold)}
.steps h3{margin:12px 0 6px;font-size:17px;font-weight:600}
.steps p{font-size:14px;line-height:1.75;color:var(--sub)}

/* cats */
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cats a{display:flex;align-items:flex-start;gap:14px;padding:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);transition:transform .18s ease-out,border-color .18s ease-out}
.cats a:hover{transform:translateY(-2px);border-color:var(--gold)}
.cats .ico{width:20px;height:20px;margin-top:4px;color:var(--gold)}
.cats h3{font-size:15px;font-weight:600}
.cats p{margin-top:4px;font-size:13px;line-height:1.7;color:var(--sub)}
.arrow{align-self:center;margin-left:auto;font-size:15px;line-height:1;color:var(--gold)}

/* rank */
.rank{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.rank li{display:grid;grid-template-columns:52px 1fr auto auto auto;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);transition:background .18s ease-out}
.rank li:hover{background:#FAF8F3}
.rank .n{text-align:center;font-family:Georgia,"Noto Serif SC",serif;font-size:44px;line-height:1;color:var(--gold)}
.rank h3{font-size:15px;font-weight:600}
.rank .sub-s{font-size:12px;color:var(--sub)}
.hot-v{font-size:13px;color:var(--sub)}
.score{font-size:13px;font-weight:600;color:var(--star)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border-top:1px solid var(--gold);padding-top:32px}
.stats b{display:block;font-family:Georgia,"Noto Serif SC",serif;font-size:52px;line-height:1;letter-spacing:-.02em}
.stats span{display:block;margin-top:8px;font-size:13px;color:var(--sub)}
.js .js-reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.js .js-reveal.in{opacity:1;transform:none}

/* quotes */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.quotes>li{padding:24px;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.quotes>li:nth-child(2){margin-top:24px}
.stars{font-size:12px;letter-spacing:3px;color:var(--star)}
.quotes p{margin:10px 0 16px;font-size:15px;line-height:1.8}
.cite{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--sub)}
.ava{width:34px;height:34px;border-radius:50%;background:#EFEBE1;color:var(--ink);display:grid;place-items:center;font-size:13px;font-weight:600}

/* who */
.who{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.who li{padding:22px;border:1px solid var(--line);border-radius:var(--r)}
.who b{font-family:Georgia,"Noto Serif SC",serif;font-size:14px;color:var(--gold)}
.who h3{margin:8px 0 6px;font-size:16px;font-weight:600}
.who p{font-size:14px;line-height:1.7;color:var(--sub)}

/* news */
.news{display:grid;grid-template-columns:1.05fr .95fr;gap:48px}
.news-lead img{aspect-ratio:16/9;object-fit:cover;border-radius:var(--r);border:1px solid var(--line)}
.news-lead h3{margin:16px 0 6px;font-size:19px;font-weight:600;line-height:1.5}
.news-lead time,.news-list time{font-size:12px;color:var(--sub)}
.news-list li{display:flex;align-items:baseline;justify-content:space-between;gap:18px;padding:15px 0;border-bottom:1px solid var(--line)}
.news-list li:first-child{padding-top:0}
.news-list h3{font-size:15px;font-weight:500;line-height:1.6;transition:color .18s ease-out}
.news-list a:hover h3{color:var(--gold)}

/* explain */
.explain{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.fold details{border-bottom:1px solid var(--line);padding:14px 0}
.fold summary,.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;font-size:15px;font-weight:600;cursor:pointer;list-style:none}
.fold summary::-webkit-details-marker,.faq summary::-webkit-details-marker{display:none}
.fold summary::after,.faq summary::after{content:"+";flex:none;font-size:19px;line-height:1;color:var(--gold)}
.fold details[open] summary::after,.faq details[open] summary::after{content:"−"}
.fold p{padding:8px 0 4px;font-size:14px;line-height:1.8;color:var(--sub)}

/* band */
.band{background:var(--ink);color:var(--bg);padding:44px 0}
.band ul{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.band b{display:block;font-family:Georgia,"Noto Serif SC",serif;font-size:38px;line-height:1;color:#fff}
.band span{display:block;margin-top:8px;font-size:12px;letter-spacing:.06em;color:#B9B4CC}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{font-size:16px}
.faq p{max-width:840px;padding:10px 0 0;font-size:15px;color:var(--sub)}

/* cta */
.cta{padding:72px 0;border-top:1px solid var(--gold);border-bottom:1px solid var(--gold);text-align:center}
.cta h2{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700}
.cta p{margin-top:12px;color:var(--sub)}

/* footer */
.ft{background:var(--ink);color:#B9B4CC;padding:56px 0 24px}
.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.ft h3{margin-bottom:14px;font-size:14px;font-weight:600;color:#fff}
.ft p{font-size:13px;line-height:1.9;color:#9C96B4}
.ft .brand{margin-bottom:12px}
.ft a{display:block;font-size:14px;line-height:2;color:#B9B4CC;transition:color .18s ease-out}
.ft a:hover{color:var(--gold)}
.ft-bot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8E88A8}
.ft-bot i{display:block;width:36px;height:1px;background:var(--gold)}

@media (max-width:1024px){
  .stage{grid-template-columns:1fr 1fr;gap:24px}
  .stage .shot{grid-column:1/-1;order:-1;max-width:400px;margin:0 auto;width:100%}
  .grid4{grid-template-columns:repeat(3,1fr)}
  .cats{grid-template-columns:repeat(2,1fr)}
  .rank{grid-template-columns:1fr;gap:0}
  .sol{grid-template-columns:1fr;gap:32px}
  .sol-fig{margin-top:0}
  .stats{grid-template-columns:repeat(2,1fr);gap:32px}
  .who{grid-template-columns:repeat(2,1fr)}
  .news,.explain{grid-template-columns:1fr;gap:32px}
  .ft-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  section{padding:56px 0}
  .hero{padding:48px 0 56px}
  .stage{grid-template-columns:1fr;gap:20px}
  .stage .shot{max-width:100%}
  .side.right{text-align:left}
  .side.right li{border-right:0;border-left:2px solid var(--gold);padding:0 0 0 14px}
  .grid4{grid-template-columns:repeat(2,1fr);gap:16px}
  .pains{grid-template-columns:1fr}
  .pains li{border-right:0;border-bottom:1px solid var(--line);padding:22px 0}
  .pains li+li{padding-left:0}
  .pains li:last-child{border-bottom:0}
  .steps{grid-template-columns:1fr;gap:28px}
  .steps li{border-left:2px solid var(--line);padding-left:18px}
  .cats{grid-template-columns:1fr}
  .hot li{grid-template-columns:96px 1fr}
  .hot img{width:96px;height:96px}
  .rank li{grid-template-columns:40px 1fr auto auto;gap:10px}
  .rank .n{font-size:32px}
  .rank .tag{display:none}
  .quotes{grid-template-columns:1fr}
  .quotes>li:nth-child(2){margin-top:0}
  .who{grid-template-columns:1fr}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .hd-top{height:60px}
  .nav{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:6px 16px 12px}
  .nav a{flex-direction:column;justify-content:center;gap:4px;min-height:56px;padding:6px 2px;font-size:12px;text-align:center;border:1px solid var(--line);border-radius:var(--rs)}
  .nav a::after{display:none}
  .nav a.on{border-color:var(--gold);color:var(--ink)}
  h1{font-size:clamp(25px,7vw,33px)}
  .lede{font-size:15px}
  .grid4{grid-template-columns:repeat(2,1fr);gap:12px}
  .card-b{padding:12px}
  .card-b h3{font-size:14px}
  .stats{grid-template-columns:1fr 1fr;gap:24px}
  .stats b{font-size:40px}
  .band ul{grid-template-columns:1fr 1fr;gap:24px}
  .band b{font-size:30px}
  .news-list li{flex-direction:column;gap:4px}
  .news-lead h3{font-size:17px}
  .ft-grid{grid-template-columns:1fr}
  .acts .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .js .js-reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}