/* roulang page: index */
:root{
  --color-ink-950:#0E0B10;
  --color-ink-900:#151019;
  --color-ink-800:#211A26;
  --color-paper-100:#F6F2EC;
  --color-paper-200:#EAE2D8;
  --color-primary:#B23A4B;
  --color-primary-dark:#8F2938;
  --color-primary-disabled:#C88E97;
  --color-accent:#C8A165;
  --color-accent-dark:#B08A4C;
  --color-line:#3A313F;
  --color-line-light:#E1D6CC;
  --gradient-dark:linear-gradient(120deg,#0E0B10 0%,#1B1520 100%);
  --shadow-deep:0 20px 40px rgba(0,0,0,0.35);
  --shadow-card:0 8px 24px rgba(30,15,25,0.06);
  --radius-card:20px;
  --radius-pill:999px;
  --font-title:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-serif-num:Georgia,"Times New Roman",serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--color-ink-950);
  color:var(--color-paper-100);
  font-family:var(--font-body);
  line-height:1.75;
  font-size:1rem;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
ul,ol,dl,dt,dd{margin:0;padding:0}
p{margin:0}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:3px;
}
::selection{background:var(--color-primary);color:var(--color-paper-100)}

.wrap{
  max-width:1210px;
  margin-inline:auto;
  padding-inline:24px;
}

.section{padding-top:110px;padding-bottom:110px}
.section-dark{background:var(--color-ink-950);color:var(--color-paper-100)}
.section-deep{background:var(--color-ink-900);color:var(--color-paper-100)}
.section-paper{
  background:var(--color-paper-100);
  color:#231B22;
}
.section-deep .section-intro,.section-dark .section-intro{color:rgba(246,242,236,0.7)}
.section-paper .section-intro{color:rgba(43,30,38,0.7)}

.section-head-inline{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:end;
  margin-bottom:64px;
}
.sec-index-label{
  display:inline-flex;
  align-items:center;
  gap:14px;
  color:var(--color-accent);
  font-size:0.8rem;
  letter-spacing:0.16em;
  margin-bottom:16px;
  font-weight:600;
}
.sec-index-label::after{
  content:"";
  width:44px;height:1px;
  background:var(--color-line);
}
.sec-index-label .sec-num{
  font-family:var(--font-serif-num);
  font-size:0.92rem;
  color:var(--color-primary);
}
.section-paper .sec-index-label::after{background:var(--color-line-light)}
.sec-title{
  font-family:var(--font-title);
  font-size:clamp(1.7rem,3vw,2.7rem);
  line-height:1.25;
  font-weight:600;
  letter-spacing:0.02em;
  margin:0;
}
.sec-copy p{
  font-size:0.94rem;
  color:rgba(246,242,236,0.68);
  max-width:34em;
  margin-left:auto;
  line-height:1.85;
}
.section-paper .sec-copy p{color:rgba(35,27,34,0.7)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 28px;
  border-radius:var(--radius-pill);
  font-size:0.88rem;
  font-weight:600;
  letter-spacing:0.05em;
  border:1px solid transparent;
  transition:all .32s ease;
}
.btn svg{transition:transform .28s ease}
.btn:hover svg{transform:translateX(5px)}
.btn-primary{
  background:var(--color-primary);
  color:#fff;
}
.btn-primary:hover{background:var(--color-primary-dark)}
.btn-primary:active{
  background:#71212D;
  transform:translateY(1px);
}
.btn-ghost{
  background:transparent;
  border-color:rgba(200,161,101,0.65);
  color:#F6F2EC;
}
.btn-ghost:hover{
  background:rgba(200,161,101,0.14);
  border-color:var(--color-accent);
  color:var(--color-accent);
}
.btn-paper-ghost{
  background:transparent;
  border-color:rgba(35,27,34,0.3);
  color:#2B1E26;
}
.btn-paper-ghost:hover{
  border-color:#B23A4B;
  color:var(--color-primary);
  background:rgba(178,58,75,0.06);
}
.btn-paper-primary{
  background:var(--color-primary);
  color:#fff;
}
.btn-paper-primary:hover{
  background:var(--color-primary-dark);
}
.btn-plain{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--color-primary);
  font-weight:600;
  font-size:0.9rem;
  letter-spacing:0.03em;
}
.btn-plain svg{transition:transform .28s ease}
.btn-plain:hover svg{transform:translateX(6px)}
.btn-block{width:100%}

.text-accent{color:var(--color-accent)}
.text-primary{color:var(--color-primary)}
.serif-num{
  font-family:var(--font-serif-num);
  letter-spacing:0.02em;
}
.eyebrow{
  font-size:0.78rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--color-accent);
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--color-accent)}
.badge-line{
  display:inline-flex;
  align-items:center;
  gap:10px;
  border:1px solid rgba(200,161,101,0.45);
  border-radius:999px;
  padding:8px 16px;
  font-size:0.8rem;
  color:var(--color-paper-200);
  background:rgba(200,161,101,0.08);
  font-weight:600;
  letter-spacing:0.04em;
}
.badge-line i{
  display:inline-block;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--color-accent);
  font-style:normal;
}

/* header */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:82px;
  display:flex;
  align-items:center;
  background:rgba(14,11,16,0.62);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .35s ease,border-color .35s ease,box-shadow .35s ease;
}
.site-header.is-scrolled{
  background:rgba(14,11,16,0.93);
  border-bottom-color:rgba(200,161,101,0.16);
  box-shadow:0 10px 30px rgba(0,0,0,0.22);
}
.header-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.brand-logo{
  width:44px;height:44px;
  border-radius:50%;
  background:var(--color-ink-900);
  border:1px solid rgba(200,161,101,0.4);
  display:grid;
  place-items:center;
  color:var(--color-accent);
  box-shadow:0 0 0 4px rgba(200,161,101,0.06);
}
.brand-text{
  font-family:var(--font-title);
  font-size:1.35rem;
  font-weight:700;
  letter-spacing:0.03em;
  color:var(--color-paper-100);
  white-space:nowrap;
}
.brand-text em{
  font-style:normal;
  color:var(--color-accent);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:12px 14px;
  font-size:0.9rem;
  color:rgba(246,242,236,0.78);
  letter-spacing:0.06em;
  transition:color .28s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:100%;
  bottom:2px;
  height:2px;
  background:var(--color-primary);
  transition:right .32s ease,background .3s ease;
}
.nav-link:hover{color:#fff}
.nav-link:hover::after{right:14px;background:var(--color-accent)}
.nav-link.active{color:#fff;font-weight:600}
.nav-link.active::after{right:14px;background:var(--color-primary)}
.header-cta{
  display:flex;
  align-items:center;
  gap:12px;
}
.header-cta .btn{
  min-height:42px;
  padding:0 18px;
  font-size:0.82rem;
  white-space:nowrap;
}
.menu-toggle{
  width:44px;height:44px;
  border-radius:12px;
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.1);
  display:none;
  align-items:center;
  justify-content:center;
  color:#fff;
}
.menu-toggle span{
  width:18px;
  height:2px;
  background:#fff;
  display:block;
  position:relative;
  transition:all .3s ease;
}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:#fff;
  transition:all .3s ease;
}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle.open span{background:transparent}
.menu-toggle.open span::before{top:0;transform:rotate(45deg)}
.menu-toggle.open span::after{top:0;transform:rotate(-45deg)}

/* mobile nav */
.mobile-nav{
  position:fixed;
  inset:0;
  background:rgba(14,11,16,0.98);
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:10px;
  z-index:99;
  opacity:0;
  visibility:hidden;
  transition:opacity .35s ease,visibility .35s ease;
  padding:80px 24px;
}
.mobile-nav.is-open{
  opacity:1;
  visibility:visible;
}
.mobile-nav a.mobile-link{
  font-family:var(--font-title);
  font-size:2rem;
  color:var(--color-paper-100);
  padding:10px 0;
  font-weight:600;
}
.mobile-nav a.mobile-link.active{color:var(--color-accent)}
.mobile-cta{
  display:flex;
  gap:14px;
  margin-top:28px;
  max-width:380px;
  width:100%;
}
.mobile-cta .btn{flex:1}

/* hero */
.hero{
  min-height:calc(100vh - 0px);
  display:flex;
  align-items:center;
  color:#fff;
  background:var(--color-ink-950);
  padding:160px 0 84px;
  position:relative;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  z-index:0;
}
.hero-bg img,.hero-bg .hero-bg-cover{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center right;
  opacity:0.5;
}
.hero-bg-cover{
  background:var(--color-ink-950);
  background-size:cover;
  background-position:center;
}
.hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(14,11,16,0.98) 0%,rgba(14,11,16,0.88) 42%,rgba(14,11,16,0.45) 100%),
    linear-gradient(0deg,rgba(14,11,16,0.96) 0%,rgba(14,11,16,0.15) 60%,rgba(14,11,16,0) 100%);
}
.hero .wrap{
  position:relative;
  z-index:1;
  width:100%;
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(0,0.8fr);
  gap:80px;
  align-items:center;
}
.hero-title{
  font-family:var(--font-title);
  font-size:clamp(2.4rem,5.2vw,4.6rem);
  line-height:1.18;
  font-weight:700;
  letter-spacing:0.02em;
  margin:22px 0 0;
  max-width:11em;
}
.hero-title .hl{
  color:var(--color-accent);
}
.hero-desc{
  margin-top:26px;
  font-size:1.03rem;
  line-height:1.9;
  max-width:25em;
  color:rgba(246,242,236,0.8);
}
.hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  align-items:center;
  margin-top:36px;
}
.hero-note{
  margin-top:16px;
  font-size:0.78rem;
  color:rgba(246,242,236,0.45);
  letter-spacing:0.04em;
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.hero-note svg{opacity:0.65}
.hero-rating{
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:36px;
  color:rgba(246,242,236,0.62);
  font-size:0.82rem;
}
.stars{
  display:inline-flex;
  gap:2px;
  color:var(--color-accent);
  letter-spacing:2px;
  font-size:0.9rem;
}
.hero-rating .score{
  font-family:var(--font-serif-num);
  font-size:1.55rem;
  color:var(--color-accent);
  font-weight:600;
  line-height:1;
}
.hero-visual{
  position:relative;
}
.visual-panel{
  background:rgba(246,242,236,0.03);
  border:1px solid rgba(246,242,236,0.13);
  border-radius:24px;
  padding:24px;
  box-shadow:var(--shadow-deep);
  position:relative;
}
.visual-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:18px;
  border-bottom:1px solid rgba(246,242,236,0.12);
}
.visual-top .kicker{
  font-size:0.84rem;
  font-weight:600;
  color:var(--color-accent);
}
.visual-top .meta{
  font-size:0.74rem;
  color:rgba(246,242,236,0.42);
}
.visual-stat{
  display:flex;
  align-items:baseline;
  gap:6px;
  padding:26px 0;
  border-bottom:1px solid rgba(246,242,236,0.1);
}
.visual-stat .num{
  font-family:var(--font-serif-num);
  font-size:3.4rem;
  line-height:1;
  color:var(--color-paper-100);
}
.visual-stat .num span{color:var(--color-accent)}
.visual-stat .num-desc{
  font-size:0.82rem;
  color:rgba(246,242,236,0.6);
  max-width:8em;
  line-height:1.5;
}
.visual-item-list{
  padding:8px 0 0;
}
.visual-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:15px 2px;
  border-bottom:1px solid rgba(246,242,236,0.08);
}
.visual-item:last-child{border-bottom:0}
.visual-item .vi-index{
  font-family:var(--font-serif-num);
  color:rgba(200,161,101,0.7);
  font-size:0.84rem;
  width:30px;
  flex-shrink:0;
}
.visual-item .vi-title{
  font-size:0.92rem;
  color:rgba(246,242,236,0.88);
  flex:1;
}
.visual-item .vi-time{
  font-size:0.75rem;
  color:rgba(246,242,236,0.4);
  white-space:nowrap;
}
.visual-corner{
  position:absolute;
  width:86px;
  height:86px;
  right:-22px;
  top:-24px;
  border:1px solid rgba(200,161,101,0.36);
  transform:rotate(45deg);
  z-index:-1;
  border-radius:8px;
  background:rgba(14,11,16,0.2);
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:44px;
  align-items:center;
}
.hero-tags .label-tag{
  font-size:0.78rem;
  color:rgba(246,242,236,0.45);
  margin-right:4px;
}
.chip-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid rgba(246,242,236,0.16);
  border-radius:999px;
  padding:8px 16px;
  font-size:0.82rem;
  color:var(--color-paper-100);
  transition:all .28s ease;
  background:rgba(14,11,16,0.3);
}
.chip-link i{
  font-style:normal;
  width:0;height:0;
  border-top:4px solid transparent;
  border-bottom:4px solid transparent;
  border-left:5px solid var(--color-accent);
  opacity:0;
  transition:opacity .28s ease;
}
.chip-link:hover{
  border-color:var(--color-accent);
  color:var(--color-accent);
}
.chip-link:hover i{opacity:1}
.chip-link.on-light{
  border-color:rgba(35,27,34,0.22);
  color:#2B1E26;
  background:rgba(255,255,255,0.4);
}
.chip-link.on-light:hover{border-color:var(--color-primary);color:var(--color-primary)}

/* cards / services */
.card-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.service-card{
  position:relative;
  background:rgba(33,26,38,0.7);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:var(--radius-card);
  padding:38px 32px;
  overflow:hidden;
  transition:all .3s ease;
}
.service-card:hover{
  border-color:rgba(200,161,101,0.5);
  transform:translateY(-4px);
  box-shadow:var(--shadow-deep);
}
.service-card.is-wide{
  grid-column:1 / 3;
}
.card-icon{
  width:54px;height:54px;
  border-radius:16px;
  background:rgba(200,161,101,0.13);
  border:1px solid rgba(200,161,101,0.32);
  display:grid;
  place-items:center;
  color:var(--color-accent);
  margin-bottom:24px;
  transition:all .28s ease;
}
.service-card:hover .card-icon{
  background:var(--color-primary);
  color:#fff;
  border-color:var(--color-primary);
}
.service-card h3{
  font-family:var(--font-title);
  font-size:1.28rem;
  margin:0 0 10px;
}
.service-card p{
  font-size:0.92rem;
  color:rgba(246,242,236,0.62);
  line-height:1.8;
  margin:0;
  max-width:46em;
}
.service-card .link-more{
  margin-top:18px;
}
.card-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:18px;
}
.tag-pill{
  display:inline-flex;
  align-items:center;
  border:1px solid rgba(246,242,236,0.15);
  padding:5px 12px;
  border-radius:999px;
  font-size:0.74rem;
  color:rgba(246,242,236,0.55);
  transition:border-color .2s ease,color .2s ease;
}
.tag-pill:hover{
  color:var(--color-accent);
  border-color:rgba(200,161,101,0.55);
}
.wide-highlight{
  position:absolute;
  right:0;
  top:0;
  height:100%;
  width:4px;
  background:linear-gradient(180deg,var(--color-accent),var(--color-primary) 70%);
  opacity:0;
  transition:opacity .4s ease;
}
.service-card:hover .wide-highlight{opacity:1}

/* stats / paper */
.stats-section{
  background:var(--color-paper-100);
  color:#2B1E26;
  position:relative;
  overflow:hidden;
}
.stats-section .deco-number{
  position:absolute;
  right:-30px;
  top:-60px;
  font-family:var(--font-serif-num);
  font-size:300px;
  line-height:1;
  color:rgba(178,58,75,0.04);
  pointer-events:none;
  font-weight:700;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:40px;
  position:relative;
}
.stat-item{
  padding:10px 0;
}
.stat-digit{
  font-family:var(--font-serif-num);
  font-size:clamp(2.6rem,4vw,4rem);
  font-weight:500;
  line-height:1.1;
  color:#2B1E26;
  letter-spacing:0.01em;
}
.stat-digit span{
  color:var(--color-primary);
}
.stat-line{
  display:block;
  width:42px;
  height:2px;
  background:var(--color-accent);
  margin:16px 0;
}
.stat-label{
  font-size:0.9rem;
  font-weight:600;
  color:#2B1E26;
}
.stat-sub{
  font-size:0.78rem;
  color:rgba(35,27,34,0.55);
  margin-top:4px;
  line-height:1.5;
}
.stats-caption{
  margin-top:54px;
  font-size:0.8rem;
  color:rgba(35,27,34,0.55);
  max-width:46em;
  line-height:1.8;
}

/* case section */
.case-card{
  display:grid;
  grid-template-columns:1fr 1fr;
  background:var(--color-ink-900);
  border:1px solid rgba(255,255,255,0.06);
  border-radius:8px;
  overflow:hidden;
  min-height:420px;
}
.case-card + .case-card{
  margin-top:30px;
}
.case-content{
  padding:clamp(28px,4vw,60px);
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.case-label{
  font-size:0.76rem;
  letter-spacing:0.18em;
  color:var(--color-accent);
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:12px;
}
.case-label::before{content:"—";color:var(--color-primary)}
.case-content blockquote{
  font-family:var(--font-title);
  font-size:1.14rem;
  line-height:1.85;
  margin:0 0 22px;
  color:rgba(246,242,236,0.9);
}
.case-content p{
  font-size:0.9rem;
  color:rgba(246,242,236,0.62);
  line-height:1.85;
}
.case-meta-tags{
  display:flex;
  gap:10px;
  margin-top:24px;
}
.case-img{
  position:relative;
  overflow:hidden;
  min-height:260px;
}
.case-img img{
  position:absolute;
  inset:0;
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.case-card:hover .case-img img{
  transform:scale(1.04);
}
.case-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(21,16,25,0.55) 0%,transparent 45%);
}
.case-card.reverse .case-img::after{
  background:linear-gradient(-90deg,rgba(21,16,25,0.5) 0%,transparent 45%);
}
.case-card .view-link{
  margin-top:30px;
  align-self:flex-start;
}
.case-quote-mark{
  font-family:var(--font-serif-num);
  font-size:3rem;
  color:var(--color-accent);
  line-height:1;
  margin-bottom:-14px;

}

/* solution / paper */
.package-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:26px;
}
.package-card{
  background:#fff;
  border:1px solid var(--color-line-light);
  border-radius:var(--radius-card);
  padding:36px 34px;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  transition:all .34s ease;
}
.package-card:hover{
  box-shadow:0 14px 34px rgba(30,15,25,0.13);
  transform:translateY(-4px);
  border-color:#D9C5B2;
}
.package-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px;
}
.package-name{
  font-family:var(--font-title);
  font-size:1.42rem;
  font-weight:700;
  color:#231B22;
}
.package-tag{
  font-size:0.73rem;
  letter-spacing:0.08em;
  border:1px solid var(--color-primary);
  color:var(--color-primary);
  padding:4px 12px;
  border-radius:999px;
  white-space:nowrap;
}
.package-desc{
  margin-top:14px;
  font-size:0.88rem;
  color:rgba(35,27,34,0.62);
  line-height:1.8;
}
.package-list{
  list-style:none;
  margin:24px 0;
}
.package-list li{
  position:relative;
  padding:8px 0 8px 28px;
  font-size:0.88rem;
  color:#3B2C36;
  border-bottom:1px solid #F0E8DF;
}
.package-list li:last-child{border-bottom:0}
.package-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:16px;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--color-accent);
  border:1px solid var(--color-accent-dark);
  transform:rotate(45deg);
}
.package-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:10px;
}
.package-actions .btn{
  min-height:44px;
}

/* FAQ */
.faq-layout{
  max-width:820px;
  margin-inline:auto;
}
.faq-item{
  border-bottom:1px solid rgba(246,242,236,0.12);
  border-radius:0;
}
.faq-item:first-child{
  border-top:1px solid rgba(246,242,236,0.12);
}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:26px 8px;
  font-size:1.08rem;
  font-weight:600;
  color:var(--color-paper-100);
  border-radius:0;
  transition:color .28s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--color-accent)}
.faq-item summary .faq-icon{
  flex-shrink:0;
  width:30px;height:30px;
  border:1px solid rgba(246,242,236,0.3);
  border-radius:50%;
  display:grid;
  place-items:center;
  position:relative;
  transition:all .3s ease;
}
.faq-item summary .faq-icon::before,.faq-item summary .faq-icon::after{
  content:"";
  position:absolute;
  background:var(--color-paper-100);
  transition:all .3s ease;
}
.faq-item summary .faq-icon::before{width:11px;height:1.5px}
.faq-item summary .faq-icon::after{width:1.5px;height:11px}
.faq-item[open] summary{color:var(--color-accent)}
.faq-item[open] summary .faq-icon{border-color:var(--color-accent)}
.faq-item[open] summary .faq-icon::after{transform:scaleY(0)}
.faq-item[open] summary .faq-icon::before{background:var(--color-accent)}
.faq-item .faq-body{
  padding:0 8px 28px;
  font-size:0.92rem;
  line-height:1.9;
  color:rgba(246,242,236,0.66);
  max-width:58em;
}
.faq-foot-note{
  margin-top:32px;
  text-align:center;
  font-size:0.84rem;
  color:rgba(246,242,236,0.42);
}

/* contact */
.contact-grid{
  display:grid;
  grid-template-columns:0.95fr 1.05fr;
  gap:70px;
  align-items:center;
}
.contact-intro .sec-index-label{margin-bottom:20px}
.contact-intro .sec-title{
  font-size:clamp(1.9rem,3vw,2.8rem);
  font-family:var(--font-title);
  color:#2B1E26;
}
.contact-intro > p{
  margin-top:28px;
  font-size:0.96rem;
  line-height:1.9;
  color:rgba(35,27,34,0.66);
  max-width:24em;
}
.contact-methods{
  margin-top:38px;
  display:grid;
  gap:24px;
}
.method-item{
  display:flex;
  align-items:center;
  gap:16px;
}
.method-icon{
  width:48px;height:48px;
  border-radius:14px;
  background:#F1EAE0;
  border:1px solid #E1D6CC;
  display:grid;
  place-items:center;
  color:var(--color-primary);
  font-size:0.8rem;
}
.method-label{
  font-size:0.76rem;
  color:rgba(35,27,34,0.5);
  letter-spacing:0.05em;
}
.method-value{
  font-size:1.02rem;
  color:#2B1E26;
  font-weight:600;
}
.form-shell{
  background:var(--color-ink-950);
  border-radius:18px;
  padding:40px;
  color:#fff;
  box-shadow:0 24px 70px rgba(15,8,14,0.25);
  border:1px solid rgba(246,242,236,0.07);
}
.form-shell .form-title{
  font-family:var(--font-title);
  font-size:1.5rem;
  margin:0 0 6px;
}
.form-shell .form-note{
  font-size:0.82rem;
  color:rgba(246,242,236,0.5);
  margin-bottom:28px;
}
.form-group{
  margin-bottom:20px;
}
.form-group label{
  display:block;
  font-size:0.83rem;
  font-weight:600;
  margin-bottom:8px;
  letter-spacing:0.03em;
  color:rgba(246,242,236,0.9);
}
.form-group label .optional{
  font-weight:400;
  color:rgba(246,242,236,0.38);
  margin-left:6px;
}
.form-group input,.form-group select,.form-group textarea{
  width:100%;
  min-height:48px;
  border-radius:12px;
  border:1px solid rgba(246,242,236,0.16);
  background:rgba(255,255,255,0.04);
  color:#fff;
  font-size:0.92rem;
  padding:0 16px;
  outline:none;
  transition:border-color .28s ease,background .28s ease;
}
.form-group textarea{
  min-height:120px;
  padding-top:14px;
  resize:vertical;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  border-color:var(--color-accent);
  background:rgba(255,255,255,0.07);
}
.form-group select option{
  background:var(--color-ink-900);
  color:var(--color-paper-100);
}
.form-privacy{
  font-size:0.76rem;
  color:rgba(246,242,236,0.36);
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:-4px;
  margin-bottom:20px;
}
.form-success{
  text-align:center;
  padding:44px 10px;
}
.form-success .success-icon{
  width:70px;height:70px;
  border-radius:50%;
  border:2px solid var(--color-accent);
  display:grid;
  place-items:center;
  margin:0 auto 22px;
  color:var(--color-accent);
}
.form-success h3{
  font-family:var(--font-title);
  font-size:1.55rem;
  margin:0 0 12px;
}
.form-success p{
  font-size:0.88rem;
  color:rgba(246,242,236,0.55);
  max-width:20em;
  margin:0 auto;
  line-height:1.8;
}
.form-success .btn{
  margin-top:26px;
}

/* footer */
.site-footer{
  background:var(--color-ink-950);
  border-top:1px solid rgba(246,242,236,0.06);
  padding:80px 0 30px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr;
  gap:60px;
  padding-bottom:50px;
  border-bottom:1px solid rgba(246,242,236,0.07);
}
.footer-brand .brand{
  margin-bottom:18px;
}
.footer-about{
  font-size:0.86rem;
  color:rgba(246,242,236,0.48);
  max-width:30em;
  line-height:1.85;
  margin-top:14px;
}
.footer-title{
  font-size:0.8rem;
  letter-spacing:0.18em;
  color:var(--color-accent);
  margin-bottom:18px;
}
.footer-links{
  list-style:none;
  display:grid;
  gap:8px;
}
.footer-links a{
  font-size:0.88rem;
  color:rgba(246,242,236,0.6);
  line-height:1.8;
  transition:color .25s ease,padding-left .25s ease;
}
.footer-links a:hover{
  color:var(--color-accent);
  padding-left:5px;
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
  padding-top:24px;
}
.footer-made{
  font-size:0.8rem;
  color:rgba(246,242,236,0.48);
}
.footer-made a{
  color:var(--color-accent);
}
.footer-social{
  display:flex;
  gap:12px;
}
.social-icon{
  width:40px;height:40px;
  border-radius:12px;
  display:grid;
  place-items:center;
  border:1px solid rgba(246,242,236,0.12);
  color:rgba(246,242,236,0.6);
  transition:all .25s ease;
}
.social-icon:hover{
  color:var(--color-accent);
  border-color:rgba(200,161,101,0.6);
  background:rgba(200,161,101,0.08);
}

/* entrance effects */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s ease-out,transform .55s ease-out;
}
.reveal.visible{
  opacity:1;
  transform:none;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,.reveal{
    transition:none!important;
    animation:none!important;
    transform:none!important;
    opacity:1!important;
  }
}

/* responsive */
@media(max-width:1100px){
  .section{padding-top:80px;padding-bottom:80px}
  .hero-grid{
    grid-template-columns:minmax(0,1.2fr) minmax(0,0.8fr);
    gap:48px;
  }
  .hero{padding:150px 0 64px}
}
@media(max-width:920px){
  .header-cta .btn-ghost{display:none}
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .hero-grid{
    grid-template-columns:1fr;
    gap:48px;
  }
  .hero-desc{max-width:34em}
  .hero-visual{
    max-width:640px;
  }
  .hero-bg::after{
    background:linear-gradient(180deg,rgba(14,11,16,0.5) 0%,rgba(14,11,16,0.92) 100%);
  }
  .section-head-inline{
    grid-template-columns:1fr;
    gap:18px;
    margin-bottom:44px;
  }
  .sec-copy p{margin-left:0}
  .card-grid{grid-template-columns:1fr}
  .service-card.is-wide{grid-column:1}
  .stats-grid{
    grid-template-columns:repeat(2,1fr);
    gap:30px 20px;
  }
  .case-card{
    grid-template-columns:1fr;
  }
  .case-card.reverse .case-content{order:2}
  .case-card.reverse .case-img{order:1}
  .case-img{
    position:relative;
    min-height:300px;
  }
  .package-grid{
    grid-template-columns:1fr;
  }
  .contact-grid{
    grid-template-columns:1fr;
    gap:46px;
  }
  .footer-top{
    grid-template-columns:1fr 1fr;
    gap:40px;
  }
}
@media(max-width:720px){
  html body{padding-top:0}
  .wrap{padding-inline:18px}
  .site-header{height:68px}
  .brand-text{font-size:1.15rem}
  .brand-logo{width:38px;height:38px}
  .header-cta .btn{
    min-height:38px;
    padding:0 14px;
    font-size:0.77rem;
  }
  .header-cta .btn svg{display:none}
  .hero{padding:140px 0 60px}
  .hero-cta .btn{
    width:100%;
  }
  .mobile-cta{
    flex-direction:column;
  }
  .mobile-cta .btn{width:100%}
  .section{padding-top:64px;padding-bottom:64px}
  .section-head-inline{margin-bottom:34px}
  .service-card,.package-card,.form-shell,.visual-panel{
    padding:26px 20px;
  }
  .stats-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .stat-line{margin:10px 0}
  .case-card + .case-card{margin-top:20px}
  .case-img{position:relative;min-height:230px}
  .footer-top{
    grid-template-columns:1fr;
    gap:34px;
  }
  .footer-bottom{
    justify-content:center;
  }
  .form-group input,.form-group select,.form-group textarea{
    min-height:46px;
  }
}
@media(max-width:480px){
  .hero-title{
    font-size:clamp(2rem,7.5vw,2.9rem);
  }
  .hero-cta .btn{width:100%}
  .hero-rating{
    flex-wrap:wrap;
  }
  .card-grid{
    gap:16px;
  }
  .case-content{
    padding:28px 22px;
  }
  .visual-stat .num{
    font-size:2.8rem;
  }
  .header-cta .btn-primary{
    min-width:0;
    padding:0 10px;
  }
  .header-cta .btn-primary span{
    font-size:0.72rem;
  }
}

/* roulang page: category1 */
/* ============ design tokens ============ */
:root{
  --color-ink-950:#0E0B10;
  --color-ink-900:#151019;
  --color-ink-800:#211A26;
  --color-paper-100:#F6F2EC;
  --color-paper-200:#EAE2D8;
  --color-primary:#B23A4B;
  --color-primary-dark:#8F2938;
  --color-primary-disabled:#C88E97;
  --color-accent:#C8A165;
  --color-accent-dark:#B08A4C;
  --color-line:#3A313F;
  --color-line-light:#E1D6CC;
  --gradient-dark:linear-gradient(120deg,#0E0B10 0%,#1B1520 100%);
  --shadow-deep:0 20px 40px rgba(0,0,0,0.35);
  --shadow-card:0 8px 24px rgba(30,15,25,0.06);
  --radius-card:20px;
  --radius-pill:999px;
  --font-title:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-serif-num:Georgia,"Times New Roman",serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--color-ink-950);
  color:var(--color-paper-100);
  font-family:var(--font-body);
  line-height:1.75;
  font-size:1rem;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:3px;
  border-radius:6px;
}
.wrap{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}

/* ============ header ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:82px;
  display:flex;
  align-items:center;
  background:rgba(14,11,16,0.60);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .35s ease,border-color .35s ease,box-shadow .35s ease;
}
.site-header.is-scrolled{
  background:rgba(14,11,16,0.93);
  border-bottom-color:rgba(200,161,101,0.16);
  box-shadow:0 10px 30px rgba(0,0,0,0.22);
}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand-logo{
  width:44px;height:44px;border-radius:50%;
  background:var(--color-ink-900);
  border:1px solid rgba(200,161,101,0.4);
  display:grid;place-items:center;
  color:var(--color-accent);
  box-shadow:0 0 0 4px rgba(200,161,101,0.06);
}
.brand-text{
  font-family:var(--font-title);
  font-size:1.35rem;
  font-weight:700;
  letter-spacing:0.03em;
  color:var(--color-paper-100);
  white-space:nowrap;
}
.brand-text em{font-style:normal;color:var(--color-accent)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:12px 14px;
  font-size:0.9rem;
  color:rgba(246,242,236,0.78);
  letter-spacing:0.06em;
  transition:color .28s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:100%;bottom:2px;
  height:2px;
  background:var(--color-primary);
  transition:right .32s ease,background .3s ease;
}
.nav-link:hover{color:#fff}
.nav-link:hover::after{right:14px;background:var(--color-accent)}
.nav-link.active{color:#fff;font-weight:600}
.nav-link.active::after{right:14px;background:var(--color-primary)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;
  border-radius:var(--radius-pill);
  font-size:0.88rem;font-weight:600;
  letter-spacing:0.05em;
  border:1px solid transparent;
  transition:all .32s ease;
  white-space:nowrap;
}
.btn svg{transition:transform .28s ease}
.btn:hover svg{transform:translateX(5px)}
.btn-primary{background:var(--color-primary);color:#fff}
.btn-primary:hover{background:var(--color-primary-dark)}
.btn-primary:active{background:#71212D;transform:translateY(1px)}
.btn-ghost{
  background:transparent;
  border-color:rgba(200,161,101,0.65);
  color:#F6F2EC;
}
.btn-ghost:hover{
  background:rgba(200,161,101,0.14);
  border-color:var(--color-accent);
  color:var(--color-accent);
}
.btn-paper-primary{background:var(--color-primary);color:#fff}
.btn-paper-primary:hover{background:var(--color-primary-dark)}
.btn-paper-ghost{
  background:transparent;
  border-color:rgba(35,27,34,0.3);
  color:#2B1E26;
}
.btn-paper-ghost:hover{
  border-color:#B23A4B;
  color:var(--color-primary);
  background:rgba(178,58,75,0.06);
}
/* mobile menu */
.menu-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  background:rgba(200,161,101,0.08);
  border:1px solid rgba(200,161,101,0.25);
  color:var(--color-paper-100);
  align-items:center;
  justify-content:center;
}
.mobile-panel{
  position:fixed;
  inset:0;
  z-index:99;
  background:var(--color-ink-950);
  padding:110px 32px 40px;
  display:flex;
  flex-direction:column;
  transform:translateY(-2%);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease,transform .3s ease;
}
.mobile-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-panel .m-link{
  font-family:var(--font-title);
  font-size:2rem;
  font-weight:600;
  color:var(--color-paper-100);
  padding:18px 0;
  border-bottom:1px solid var(--color-line);
  letter-spacing:0.03em;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.mobile-panel .m-link.active{color:var(--color-accent)}
.mobile-cta{display:flex;gap:12px;margin-top:40px}
.mobile-cta .btn{flex:1;min-height:52px}

/* ============ section scaffolding ============ */
.section{padding-top:110px;padding-bottom:110px}
.section-dark{background:var(--color-ink-950);color:var(--color-paper-100)}
.section-deep{background:var(--color-ink-900);color:var(--color-paper-100)}
.section-paper{background:var(--color-paper-100);color:#231B22}
.section-deep .section-intro,.section-dark .section-intro{color:rgba(246,242,236,0.7)}
.section-paper .section-intro{color:rgba(43,30,38,0.7)}
.sec-title{
  font-family:var(--font-title);
  font-size:clamp(1.7rem,3vw,2.7rem);
  line-height:1.25;
  font-weight:600;
  letter-spacing:0.02em;
  margin:0;
}

/* ============ category hero ============ */
.cat-hero{
  padding-top:175px;
  padding-bottom:90px;
  background:var(--color-paper-100);
  color:#231B22;
  position:relative;
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;
  width:440px;height:440px;
  border-radius:50%;
  background:rgba(178,58,75,0.05);
  top:-180px;right:-120px;
  pointer-events:none;
}
.cat-hero::after{
  content:"百科";
  position:absolute;
  right:5%;bottom:8px;
  font-family:var(--font-title);
  font-size:clamp(4rem,10vw,8.5rem);
  font-weight:700;
  color:rgba(178,58,75,0.04);
  pointer-events:none;
  letter-spacing:0.02em;
  line-height:1;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:0.85rem;
  color:rgba(43,30,38,0.6);
  margin-bottom:30px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--color-primary);font-weight:600;transition:color .25s}
.breadcrumb a:hover{color:var(--color-primary-dark)}
.cat-hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.4fr 0.85fr;
  gap:72px;
  align-items:start;
}
.cat-hero h1{
  font-family:var(--font-title);
  font-size:clamp(2.1rem,4.5vw,3.7rem);
  line-height:1.2;
  font-weight:700;
  margin:0 0 18px;
  color:#1D1519;
  letter-spacing:0.02em;
}
.cat-hero h1 .accent-word{color:var(--color-primary)}
.cat-hero .lead-desc{
  font-size:1rem;
  line-height:1.9;
  color:rgba(43,30,38,0.76);
  max-width:60ch;
  margin-bottom:30px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:6px;
}
.hero-tags a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 16px;
  border:1px solid var(--color-line-light);
  border-radius:999px;
  font-size:0.82rem;
  color:#2B1E26;
  transition:all .28s ease;
  background:rgba(255,255,255,0.4);
}
.hero-tags a::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:var(--color-accent-dark);
  flex-shrink:0;
}
.hero-tags a:hover{
  border-color:var(--color-primary);
  color:var(--color-primary);
  background:#fff;
  transform:translateY(-2px);
}
.right-spot{
  border-radius:var(--radius-card);
  background:#fff;
  border:1px solid var(--color-line-light);
  padding:34px;
  box-shadow:var(--shadow-card);
  position:relative;
}
.right-spot .mini-label{
  font-size:0.76rem;
  letter-spacing:0.14em;
  color:var(--color-primary);
  font-weight:700;
  text-transform:uppercase;
  display:block;
  margin-bottom:24px;
}
.ship-line{
  display:flex;
  align-items:center;
  gap:16px;
  padding:16px 0;
  border-bottom:1px dashed var(--color-line-light);
  font-size:0.95rem;
  color:#2B1E26;
}
.ship-line:last-of-type{border-bottom:none}
.ship-line .dot{
  width:32px;height:32px;
  flex-shrink:0;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:rgba(178,58,75,0.08);
  color:var(--color-primary);
  font-size:0.82rem;
  font-weight:700;
}
.ship-line b{
  font-weight:700;
  color:#1D1519;
  display:block;
  font-size:0.93rem;
}
.ship-line span{
  font-size:0.85rem;
  color:rgba(43,30,38,0.68);
  line-height:1.5;
}
.spot-note{
  margin-top:18px;
  background:rgba(200,161,101,0.1);
  border-radius:12px;
  padding:14px 18px;
  font-size:0.85rem;
  color:rgba(43,30,38,0.8);
  line-height:1.6;
}

/* ============ sub category cards ============ */
.sub-wrap{background:var(--color-ink-950);position:relative}
.sub-card{
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--color-ink-800);
  border:1px solid rgba(200,180,160,0.14);
  display:flex;
  flex-direction:column;
  height:100%;
  transition:transform .32s ease,border-color .32s ease,box-shadow .32s ease;
  position:relative;
}
.sub-card:hover{
  transform:translateY(-8px);
  border-color:rgba(200,161,101,0.7);
  box-shadow:var(--shadow-deep);
}
.sub-card .cover{
  aspect-ratio:4/3;
  overflow:hidden;
  position:relative;
  background:var(--color-ink-900);
}
.sub-card .cover img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.sub-card:hover .cover img{transform:scale(1.06)}
.sub-card .cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to top, rgba(14,11,16,0.55) 0%, transparent 46%);
  pointer-events:none;
}
.sub-card .cat-no{
  position:absolute;
  left:18px;top:16px;
  background:rgba(14,11,16,0.72);
  backdrop-filter:blur(6px);
  border:1px solid rgba(200,161,101,0.35);
  color:var(--color-accent);
  font-family:var(--font-serif-num);
  font-size:0.82rem;
  padding:5px 14px;
  border-radius:999px;
  letter-spacing:0.1em;
  z-index:2;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter:blur(4px);
}
.sub-card .body{padding:26px 26px 24px;display:flex;flex-direction:column;flex:1}
.sub-card .b-title{
  font-family:var(--font-title);
  font-size:1.22rem;
  font-weight:700;
  color:var(--color-paper-100);
  margin:0 0 10px;
  line-height:1.4;
  transition:color .3s ease;
}
.sub-card:hover .b-title{color:var(--color-accent)}
.sub-card .b-desc{
  font-size:0.9rem;
  color:rgba(246,242,236,0.62);
  line-height:1.75;
  margin:0 0 18px;
  flex:1;
}
.read-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--color-accent);
  font-size:0.86rem;
  font-weight:600;
  letter-spacing:0.04em;
  margin-top:auto;
}
.read-more svg{transition:transform .28s ease}
.read-more:hover svg{transform:translateX(5px)}
.card-grid{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:30px;
}
.grid-pattern .sub-card:nth-child(2){
  border-color:rgba(200,161,101,0.45);
  box-shadow:0 0 0 1px rgba(200,161,101,0.14);
}
.section-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:0.82rem;
  letter-spacing:0.14em;
  color:var(--color-accent);
  display:inline-flex;
  align-items:center;
  font-weight:700;
  margin-bottom:20px;
}
.section-tag .no{
  font-family:var(--font-serif-num);
  font-size:1rem;
}
.section-tag::before{content:"";width:30px;height:1px;background:var(--color-accent)}
.section-paper .section-tag{color:var(--color-primary)}
.section-paper .section-tag::before{background:var(--color-primary)}

/* ============ must read list ============ */
.must-wrap{background:var(--color-ink-900)}
.must-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:48px}
.must-list{display:grid;grid-template-columns:1fr 1fr;gap:0 80px}
.must-item{
  display:flex;
  align-items:flex-start;
  gap:22px;
  padding:22px 0;
  border-bottom:1px solid rgba(200,180,160,0.14);
  transition:border-color .3s ease;
  }
.must-item:hover{border-bottom-color:var(--color-accent)}
.must-item:first-child,.must-item:nth-child(2){padding-top:6px}
.must-item:last-child,.must-item:nth-last-child(2){border-bottom:none}
.must-no{
  font-family:var(--font-serif-num);
  font-size:1.7rem;
  color:var(--color-accent);
  line-height:1;
  min-width:54px;
  padding-top:6px;
}
.must-info{flex:1}
.must-info h3{
  font-family:var(--font-title);
  font-size:1.06rem;
  font-weight:600;
  color:var(--color-paper-100);
  line-height:1.55;
  margin:0 0 6px;
  transition:color .28s ease;
}
.must-info h3:hover{color:var(--color-accent)}
.must-meta{
  display:flex;
  align-items:center;
  gap:14px;
  font-size:0.82rem;
  color:rgba(246,242,236,0.5);
}
.must-meta .tag{
  border:1px solid rgba(200,161,101,0.3);
  padding:2px 10px;
  border-radius:999px;
  font-size:0.74rem;
  color:rgba(200,161,101,0.9);
}
.bookmark{
  width:36px;height:36px;
  border-radius:50%;
  border:1px solid rgba(200,180,160,0.25);
  background:transparent;
  color:rgba(246,242,236,0.45);
  display:grid;
  place-items:center;
  flex-shrink:0;
  transition:all .28s ease;
}
.bookmark:hover{
  border-color:var(--color-accent);
  color:var(--color-accent);
  background:rgba(200,161,101,0.1);
}
.bookmark.filled{
  background:var(--color-primary);
  border-color:var(--color-primary);
  color:#fff;
}

/* ============ extend nav ============ */
.extend-wrap{background:var(--color-paper-100);color:#231B22}
.extend-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:48px}
.extend-item{
  display:flex;
  align-items:center;
  gap:32px;
  padding:34px 12px;
  border-bottom:1px solid var(--color-line-light);
  transition:all .3s ease;
}
.extend-item .x-no{
  font-family:var(--font-serif-num);
  font-size:1.1rem;
  color:var(--color-accent-dark);
  min-width:42px;
  font-weight:700;
}
.extend-item .x-name{
  font-family:var(--font-title);
  font-size:clamp(1.15rem,2.2vw,1.65rem);
  font-weight:600;
  color:#1D1519;
  flex:1;
  transition:color .28s ease;
}
.extend-item .x-desc{
  color:rgba(43,30,38,0.64);
  font-size:0.9rem;
  flex:1.2;
  line-height:1.7;
}
.extend-item .arrow{
  width:48px;height:48px;
  border-radius:50%;
  border:1px solid var(--color-line-light);
  display:grid;
  place-items:center;
  color:var(--color-primary);
  transition:all .3s ease;
}
.extend-item:hover{
  border-bottom-color:var(--color-accent);
  padding-left:24px;
}
.extend-item:hover .x-name{color:var(--color-primary)}
.extend-item:hover .arrow{
  background:var(--color-primary);
  border-color:var(--color-primary);
  color:#fff;
  transform:translateX(4px);
}
.extend-item:last-child{border-bottom:none}

/* ============ faq ============ */
.faq-wrap{background:var(--color-ink-950)}
.faq-inner{max-width:820px;margin:0 auto}
.faq-item{
  border-bottom:1px solid rgba(200,180,160,0.15);
  padding:6px 0;
}
.faq-item:first-child{border-top:1px solid rgba(200,180,160,0.15)}
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:26px 6px;
  cursor:pointer;
  font-family:var(--font-title);
  font-size:1.1rem;
  font-weight:600;
  color:var(--color-paper-100);
  transition:color .28s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--color-accent)}
.faq-item .icon{
  width:32px;height:32px;
  flex-shrink:0;
  border-radius:50%;
  border:1px solid rgba(200,161,101,0.5);
  position:relative;
  transition:all .35s ease;
}
.faq-item .icon::before,.faq-item .icon::after{
  content:"";
  position:absolute;
  background:var(--color-accent);
  border-radius:2px;
  transition:transform .35s ease;
}
.faq-item .icon::before{top:14px;left:8px;right:8px;height:2px}
.faq-item .icon::after{left:14px;top:8px;bottom:8px;width:2px}
.faq-item[open]summary .icon{background:var(--color-accent);border-color:var(--color-accent)}
.faq-item[open]summary .icon::before{transform:rotate(180deg)}
.faq-item[open]summary .icon::after{transform:rotate(90deg);opacity:0}
.faq-item[open] summary{color:var(--color-accent)}
.faq-answer{
  padding:0 42px 28px 6px;
  color:rgba(246,242,236,0.72);
  font-size:0.94rem;
  line-height:1.85;
}
.faq-answer ul{padding-left:18px;margin:8px 0 0}
.faq-answer li{margin-bottom:6px}

/* ============ cta band (light) ============ */
.cta-band{
  background:var(--color-paper-100);
  color:#231B22;
  position:relative;
  overflow:hidden;
}
.cta-band .cta-inner{
  text-align:center;
  max-width:740px;
  margin:0 auto;
  position:relative;
  z-index:2;
}
.cta-band::before{
  content:"";
  position:absolute;
  width:300px;height:300px;
  border-radius:50%;
  background:rgba(200,161,101,0.14);
  top:-120px;left:-60px;
}
.cta-band .cta-title{
  font-family:var(--font-title);
  font-size:clamp(1.8rem,3.5vw,2.8rem);
  font-weight:600;
  margin:0 0 14px;
  color:#1D1519;
}
.cta-band .cta-sub{color:rgba(43,30,38,0.7);font-size:1.02rem;max-width:560px;margin:0 auto 36px;line-height:1.85}
.cta-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ============ footer ============ */
.site-footer{
  background:var(--color-ink-950);
  border-top:1px solid rgba(200,180,160,0.12);
  padding:72px 0 0;
  color:rgba(246,242,236,0.72);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--color-accent),transparent);
  opacity:0.4;
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 0.8fr 0.9fr;
  gap:60px;
  padding-bottom:58px;
}
.footer-brand .brand-text{font-size:1.5rem}
.footer-about{
  font-size:0.9rem;
  color:rgba(246,242,236,0.56);
  margin:18px 0 0;
  max-width:36ch;
  line-height:1.8;
}
.footer-title{
  font-family:var(--font-title);
  font-size:1rem;
  color:var(--color-paper-100);
  margin:0 0 22px;
  font-weight:600;
  letter-spacing:0.06em;
}
.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.footer-links a{
  color:rgba(246,242,236,0.6);
  font-size:0.9rem;
  transition:color .25s ease,transform .25s ease;
  display:inline-block;
}
.footer-links a:hover{color:var(--color-accent);transform:translateX(4px)}
.footer-bottom{
  border-top:1px solid rgba(200,180,160,0.12);
  padding:30px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
}
.footer-made{font-size:0.84rem;color:rgba(246,242,236,0.45);margin:0}
.footer-made a{color:rgba(246,242,236,0.6);transition:color .25s}
.footer-made a:hover{color:var(--color-accent)}
.footer-social{display:flex;gap:8px}
.social-icon{
  width:38px;height:38px;
  border-radius:50%;
  display:grid;
  place-items:center;
  border:1px solid rgba(200,180,160,0.22);
  color:rgba(246,242,236,0.62);
  transition:all .28s ease;
}
.social-icon:hover{
  border-color:var(--color-accent);
  color:var(--color-accent);
  background:rgba(200,161,101,0.1);
  transform:translateY(-3px);
}

/* ============ footer backpic layering ============ */
.has-backpic{position:relative}
.has-backpic .backpic-layer{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.jpg');
  background-size:cover;
  background-position:center;
  opacity:0.07;
  pointer-events: none;
}
.has-backpic > *{position:relative;z-index:2}

/* ============ reveal anim ============ */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s ease,transform .55s ease;
}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ============ responsive ============ */
@media(min-width:1024px) and (max-width:1199px){
  .cat-hero-grid{gap:48px}
  .card-grid{gap:22px}
  .must-list{gap:0 40px}
}
@media(max-width:1023px){
  .wrap{padding-left:28px;padding-right:28px}
  .cat-hero-grid{grid-template-columns:1fr;gap:48px}
  .card-grid{grid-template-columns:1fr 1fr;gap:24px}
  .must-list{grid-template-columns:1fr;gap:0}

  .must-item:first-child{padding-top:6px}
  .must-item:nth-last-child(2){border-bottom:1px solid rgba(200,180,160,0.14)}
  .must-item:last-child{border-bottom:none}
  .footer-top{grid-template-columns:1fr 1fr;gap:40px}
  .main-nav,.header-actions .btn-ghost{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn-primary{min-height:44px;padding:0 20px;font-size:0.86rem}
}
@media(max-width:767px){
  .site-header{height:68px}
  .wrap{padding-left:20px;padding-right:20px}
  .cat-hero{padding-top:140px;padding-bottom:60px}
  .cat-hero .lead-desc{max-width:100%}
  .mobile-panel{padding-left:24px;padding-right:24px}
  .card-grid{grid-template-columns:1fr}
  .section-head-grid{grid-template-columns:1fr}
  .section{padding-top:80px;padding-bottom:80px}
  .footer-top{grid-template-columns:1fr;gap:36px}
  .footer-bottom{flex-direction:column;text-align:center}
  .extend-item{flex-wrap:wrap;gap:12px;padding:26px 6px}
  .extend-item .x-desc{flex:1 1 100%}
}
@media(max-width:520px){
  .header-actions .btn-primary span{display:none}
  .header-actions .btn-primary{padding:0 16px;min-width:44px}
  .brand-text{font-size:1.2rem}
  .cat-hero h1{font-size:2rem}
  .right-spot{padding:26px 20px}
  .cta-btns{flex-direction:column;width:100%;max-width:320px;margin:0 auto}
  .cta-btns .btn{width:100%}
  .faq-item summary{font-size:1.02rem;padding:22px 2px}
  .faq-answer{padding:0 12px 22px 2px}
}