/* roulang page: index */
:root{
  --pulp:#f0761f;
  --rind:#3e5a49;
  --cream:#fff8ec;
  --soot:#241a12;
  --ash:#7b6a59;
  --line:#ecdfce;
  --curve:20px;
  --shade:0 18px 42px -26px rgba(72,42,16,.45);
  --space:clamp(52px,8vw,96px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.72;
  color:var(--soot);
  background:radial-gradient(circle at 8% 0%,#fff2df 0,transparent 42%),var(--cream);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font:inherit}
:focus-visible{outline:3px solid #f4a363;outline-offset:3px}
.ybirs-wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}
.ybirs-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.ybirs-top{position:sticky;top:0;z-index:50;background:rgba(255,248,236,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.ybirs-top-in{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.ybirs-brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-weight:800}
.ybirs-logo{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--pulp);color:#fff;font-size:1rem;box-shadow:0 10px 20px -12px rgba(240,118,31,.9)}
.ybirs-name{font-size:1.06rem;letter-spacing:.02em}
.ybirs-nav{display:flex;align-items:center;gap:2px}
.ybirs-nav-link{display:flex;align-items:center;min-height:44px;padding:0 12px;border-radius:999px;color:#5e4d3e;font-size:.95rem;transition:background .22s,color .22s}
.ybirs-nav-link:hover{background:#ffedd7;color:var(--pulp)}
.ybirs-nav-link.ybirs-on{background:var(--soot);color:#fff}
.ybirs-hero{
  position:relative;
  overflow:hidden;
  padding:clamp(66px,9vw,112px) 0;
  background:linear-gradient(96deg,rgba(255,248,236,.95),rgba(255,248,236,.64) 54%,rgba(255,246,232,.82)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.ybirs-hero-in{max-width:840px;text-align:center}
.ybirs-kicker{display:inline-flex;align-items:center;min-height:34px;padding:0 14px;border:1px solid #e5d3bd;border-radius:999px;background:rgba(255,255,255,.74);color:var(--rind);font-size:.84rem;font-weight:700;letter-spacing:.08em}
.ybirs-h1{margin:20px 0 18px;font-size:clamp(2.55rem,7vw,4.7rem);line-height:1.06;letter-spacing:-.045em;font-weight:900}
.ybirs-h1-em{color:var(--pulp)}
.ybirs-lead{max-width:730px;margin-inline:auto;color:#4b3d31;font-size:1.04rem}
.ybirs-points{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:26px 0 28px}
.ybirs-points li{display:inline-flex;align-items:center;min-height:36px;padding:0 15px;border:1px solid #e8d5bd;border-radius:999px;background:rgba(255,255,255,.78);color:#65513f;font-size:.9rem}
.ybirs-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.ybirs-btn,.ybirs-submit{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border:1px solid var(--soot);border-radius:999px;background:var(--soot);color:#fff;font-weight:700;cursor:pointer;transition:transform .22s,background .22s,border-color .22s,box-shadow .22s}
.ybirs-btn:hover,.ybirs-submit:hover{transform:translateY(-2px);background:var(--pulp);border-color:var(--pulp);box-shadow:0 12px 24px -16px rgba(240,118,31,.8)}
.ybirs-btn-ghost{background:transparent;color:var(--soot);border-color:#b9a48e}
.ybirs-btn-ghost:hover{background:#fff;color:var(--pulp);border-color:#e3b184}
.ybirs-sec{padding:var(--space) 0;border-bottom:1px solid rgba(236,223,206,.7)}
.ybirs-tint{background:linear-gradient(180deg,#fff6e8,#fffaf2)}
.ybirs-sec-head{max-width:780px;margin-bottom:34px}
.ybirs-sec-head-center{margin-inline:auto;text-align:center}
.ybirs-eyebrow{margin-bottom:8px;color:var(--pulp);font-size:.78rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase}
.ybirs-h2{font-size:clamp(1.62rem,3.3vw,2.28rem);line-height:1.24;letter-spacing:-.025em}
.ybirs-desc{margin-top:12px;color:var(--ash);font-size:.98rem}
.ybirs-rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(178px,1fr);gap:18px;overflow-x:auto;padding:4px 4px 18px;margin-inline:-4px;scroll-snap-type:x mandatory;scrollbar-width:thin}
.ybirs-rail-card{scroll-snap-align:start;overflow:hidden;border:1px solid var(--line);border-radius:var(--curve);background:#fff;transition:transform .25s,box-shadow .25s}
.ybirs-rail-card:hover{transform:translateY(-4px);box-shadow:var(--shade)}
.ybirs-poster{position:relative;aspect-ratio:3/4;overflow:hidden;background:#ead9c7}
.ybirs-poster img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.ybirs-rail-card:hover .ybirs-poster img{transform:scale(1.04)}
.ybirs-badge{position:absolute;top:10px;left:10px;display:inline-flex;align-items:center;min-height:27px;padding:0 9px;border-radius:999px;background:rgba(36,26,18,.82);color:#fff;font-size:.78rem;backdrop-filter:blur(6px)}
.ybirs-rail-body{padding:14px 16px 18px}
.ybirs-rail-body h3{font-size:1rem;line-height:1.42}
.ybirs-rail-body p{margin-top:5px;color:var(--ash);font-size:.86rem}
.ybirs-reco{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.ybirs-reco-item{display:grid;grid-template-columns:132px minmax(0,1fr);min-height:152px;overflow:hidden;border:1px solid var(--line);border-radius:var(--curve);background:#fff;transition:transform .25s,box-shadow .25s}
.ybirs-reco-item:hover{transform:translateY(-3px);box-shadow:var(--shade)}
.ybirs-reco-pic{width:132px;height:100%;min-height:152px;overflow:hidden;background:#ead9c7}
.ybirs-reco-pic img{width:100%;height:100%;object-fit:cover}
.ybirs-reco-txt{padding:16px 18px}
.ybirs-chip{display:inline-flex;align-items:center;min-height:26px;padding:0 9px;border-radius:999px;background:#fff0dd;color:#b55b16;font-size:.78rem;font-weight:700}
.ybirs-reco-txt h3{margin:8px 0 6px;font-size:1.03rem;line-height:1.38}
.ybirs-reco-txt p{color:var(--ash);font-size:.9rem}
.ybirs-types{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;overflow:hidden;border:1px solid var(--line);border-radius:var(--curve);background:var(--line)}
.ybirs-type{padding:24px 22px 28px;background:#fffaf1}
.ybirs-type-name{display:inline-flex;align-items:center;gap:8px;font-size:1.08rem;font-weight:800}
.ybirs-type-name::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--pulp)}
.ybirs-type p{margin-top:9px;color:var(--ash);font-size:.92rem}
.ybirs-picks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.ybirs-pick{position:relative;overflow:hidden;padding:26px;border:1px solid var(--line);border-radius:var(--curve);background:#fff}
.ybirs-pick-wide{grid-column:1/-1;background:linear-gradient(110deg,#fff4e3,#fffdf8 64%);border-color:#efd0aa}
.ybirs-pick-no{display:block;margin-bottom:12px;color:#e8b585;font-size:2.4rem;font-weight:900;line-height:1;font-variant-numeric:tabular-nums}
.ybirs-pick h3{font-size:1.2rem;line-height:1.36}
.ybirs-pick p{max-width:760px;margin-top:8px;color:var(--ash);font-size:.94rem}
.ybirs-pick-note{display:inline-block;margin-top:16px;color:#a86526;font-size:.84rem;font-weight:700}
.ybirs-rank{border-top:1px solid var(--line)}
.ybirs-rank-item{display:grid;grid-template-columns:52px minmax(0,1fr) auto auto;align-items:center;gap:12px;padding:16px 12px;border-bottom:1px solid var(--line);transition:background .2s}
.ybirs-rank-item:hover{background:#fffdf8}
.ybirs-rank-no{color:var(--pulp);font-size:1rem;font-weight:900;font-variant-numeric:tabular-nums}
.ybirs-rank-name{font-weight:700}
.ybirs-rank-meta{color:var(--ash);font-size:.86rem;white-space:nowrap}
.ybirs-rank-tag{display:inline-flex;align-items:center;min-height:27px;padding:0 9px;border-radius:999px;background:#eef4ef;color:#42614e;font-size:.78rem}
.ybirs-news{display:grid;gap:0;border-top:1px solid var(--line)}
.ybirs-news-item{display:grid;grid-template-columns:88px minmax(0,1fr);gap:18px;padding:18px 8px;border-bottom:1px solid var(--line)}
.ybirs-news-date{align-self:start;color:#b25b1a;font-size:.86rem;font-weight:800}
.ybirs-news-body h3{font-size:1.02rem;line-height:1.45}
.ybirs-news-body p{margin-top:5px;color:var(--ash);font-size:.9rem}
.ybirs-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.ybirs-flow-item{padding:24px 22px;border-left:3px solid var(--pulp);border-radius:0 var(--curve) var(--curve) 0;background:#fffaf1}
.ybirs-flow-no{display:block;margin-bottom:10px;color:#c68142;font-size:.82rem;font-weight:800;letter-spacing:.14em}
.ybirs-flow-item h3{font-size:1.06rem}
.ybirs-flow-item p{margin-top:7px;color:var(--ash);font-size:.91rem}
.ybirs-dark{color:#fff;background:linear-gradient(120deg,rgba(35,53,44,.97),rgba(44,69,55,.88)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;border-bottom:0}
.ybirs-dark .ybirs-eyebrow{color:#f6b77d}
.ybirs-dark .ybirs-desc{color:#d5e1d8}
.ybirs-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.ybirs-note{padding:22px 20px;border:1px solid rgba(255,255,255,.18);border-radius:var(--curve);background:rgba(255,255,255,.06)}
.ybirs-note h3{font-size:1.03rem;color:#fff9ef}
.ybirs-note p{margin-top:7px;color:#d5e1d8;font-size:.89rem}
.ybirs-quotes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.ybirs-quote{position:relative;padding:24px 22px;border:1px solid var(--line);border-radius:var(--curve);background:#fff}
.ybirs-quote::before{content:"“";position:absolute;top:4px;right:16px;color:#f1c9a1;font-size:3rem;line-height:1;font-family:Georgia,serif}
.ybirs-quote p{position:relative;color:#4d3f33;font-size:.94rem}
.ybirs-quote footer{margin-top:12px;color:var(--ash);font-size:.82rem}
.ybirs-keywords{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:24px}
.ybirs-keywords li{display:inline-flex;align-items:center;min-height:32px;padding:0 12px;border:1px solid #ead4bb;border-radius:999px;background:#fffaf2;color:#7d5a36;font-size:.84rem}
.ybirs-faq{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.ybirs-qa{padding:24px 22px;border:1px solid var(--line);border-radius:var(--curve);background:#fff}
.ybirs-qa h3{font-size:1.04rem;line-height:1.45;color:#3d2d1f}
.ybirs-qa p{margin-top:9px;color:var(--ash);font-size:.92rem}
.ybirs-join{position:relative;padding:var(--space) 0;color:#fff;background:linear-gradient(112deg,rgba(240,118,31,.96),rgba(198,79,18,.93)),url('/assets/images/backpic/back-3.webp') center/cover no-repeat;border-bottom:0}
.ybirs-join-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.82fr);align-items:center;gap:30px}
.ybirs-join-txt{max-width:670px}
.ybirs-join .ybirs-eyebrow{color:#ffe0c2}
.ybirs-join .ybirs-h2{color:#fff}
.ybirs-join-txt > p:not(.ybirs-eyebrow){margin-top:10px;color:#ffe9d6;font-size:.96rem}
.ybirs-form{display:flex;gap:10px;padding:8px;border:1px solid rgba(255,255,255,.38);border-radius:999px;background:rgba(255,255,255,.14)}
.ybirs-input{width:100%;min-height:48px;padding:0 18px;border:1px solid transparent;border-radius:999px;background:#fff;color:var(--soot);outline:none}
.ybirs-input::placeholder{color:#9b8a78}
.ybirs-input:focus{border-color:#7b3b0e;outline:3px solid rgba(255,255,255,.5);outline-offset:2px}
.ybirs-form .ybirs-submit{border-color:#2b1b0d;background:#2b1b0d;white-space:nowrap}
.ybirs-form .ybirs-submit:hover{background:#fff;color:#b45112;border-color:#fff}
.ybirs-privacy{margin-top:12px;color:#ffe7d1;font-size:.82rem}
.ybirs-foot{padding-top:60px;background:#1e2b23;color:#dce7df}
.ybirs-foot-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1fr;gap:30px;padding-bottom:42px}
.ybirs-brand-light{color:#fff}
.ybirs-foot-brand > p{max-width:340px;margin-top:14px;color:#afc0b4;font-size:.9rem}
.ybirs-foot-t{margin-bottom:13px;color:#fff5e8;font-size:.84rem;font-weight:800;letter-spacing:.12em}
.ybirs-foot-col a,.ybirs-foot-col span{display:block;padding:5px 0;color:#b9c9be;font-size:.9rem;transition:color .2s}
.ybirs-foot-col a:hover{color:#f5b47b}
.ybirs-foot-note{color:#afc0b4;font-size:.88rem}
.ybirs-copy{display:flex;justify-content:space-between;gap:16px;padding:18px 0 22px;border-top:1px solid rgba(255,255,255,.12);color:#91a498;font-size:.82rem}
@media (max-width:1024px){
  .ybirs-reco{grid-template-columns:1fr}
  .ybirs-types{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ybirs-flow{grid-template-columns:1fr}
  .ybirs-notes{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ybirs-quotes{grid-template-columns:1fr}
  .ybirs-join-in{grid-template-columns:1fr}
  .ybirs-foot-grid{grid-template-columns:1.2fr 1fr 1fr}
  .ybirs-foot-col:last-child{grid-column:1/-1}
}
@media (max-width:768px){
  .ybirs-top-in{flex-direction:column;align-items:flex-start;gap:10px;padding:12px 0}
  .ybirs-nav{width:100%;overflow-x:auto;padding-bottom:4px;white-space:nowrap;scrollbar-width:none}
  .ybirs-nav::-webkit-scrollbar{display:none}
  .ybirs-nav-link{flex:none}
  .ybirs-hero-in{text-align:left}
  .ybirs-points,.ybirs-actions{justify-content:flex-start}
  .ybirs-rail{grid-auto-columns:minmax(160px,1fr)}
  .ybirs-picks{grid-template-columns:1fr}
  .ybirs-pick-wide{grid-column:auto}
  .ybirs-faq{grid-template-columns:1fr}
  .ybirs-foot-grid{grid-template-columns:1fr 1fr}
  .ybirs-foot-brand{grid-column:1/-1}
}
@media (max-width:520px){
  .ybirs-wrap{width:calc(100% - 28px)}
  .ybirs-h1{font-size:2.65rem}
  .ybirs-lead{font-size:1rem}
  .ybirs-actions{flex-direction:column;align-items:stretch}
  .ybirs-btn{width:100%}
  .ybirs-types{grid-template-columns:1fr}
  .ybirs-reco-item{grid-template-columns:1fr;min-height:0}
  .ybirs-reco-pic{width:100%;height:178px;min-height:0}
  .ybirs-notes{grid-template-columns:1fr}
  .ybirs-news-item{grid-template-columns:1fr;gap:5px;padding:16px 4px}
  .ybirs-rank-item{grid-template-columns:32px minmax(0,1fr) auto;gap:8px}
  .ybirs-rank-meta{grid-column:3;grid-row:1}
  .ybirs-rank-tag{grid-column:2;grid-row:2;justify-self:start;margin-top:3px}
  .ybirs-form{flex-direction:column;border-radius:24px;padding:10px}
  .ybirs-input,.ybirs-form .ybirs-submit{width:100%}
  .ybirs-foot-grid{grid-template-columns:1fr}
  .ybirs-foot-col:last-child{grid-column:auto}
  .ybirs-copy{flex-direction:column;gap:4px}
}