/* roulang page: index */
:root{
  --ink:#16141F;
  --ink-soft:#221F2E;
  --paper:#F7F5F0;
  --paper-2:#F2F0EA;
  --lime:#C8F751;
  --lime-deep:#9ED32B;
  --mist:#6F63C9;
  --link:#4B3FBF;
  --white:#FFFFFF;
  --line:#E7E3DA;
  --line-dark:rgba(255,255,255,.10);
  --muted:#6B6875;
  --muted-dark:#A8A4B8;
  --warn:#D9603B;
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --shadow:0 18px 40px -24px rgba(22,20,31,.30);
  --shadow-hover:0 26px 52px -26px rgba(22,20,31,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--link);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--ink)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;color:var(--ink);line-height:1.2}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- container & grid ---------- */
.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){.grid-container{padding-left:24px;padding-right:24px}}
@media (min-width:1440px){.grid-container{max-width:1280px;padding-left:32px;padding-right:32px}}
.grid-x{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px}
.grid-x>.cell{flex:0 0 auto;width:100%;padding-left:12px;padding-right:12px;min-width:0}
@media (min-width:640px){
  .grid-x>.medium-6{width:50%}
  .grid-x>.medium-4{width:33.3333%}
}
@media (min-width:1024px){
  .grid-x>.large-3{width:25%}
  .grid-x>.large-4{width:33.3333%}
  .grid-x>.large-5{width:41.6667%}
  .grid-x>.large-7{width:58.3333%}
  .grid-x>.large-8{width:66.6667%}
  .grid-x>.large-9{width:75%}
}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,240,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(22,20,31,.95);
  border-bottom-color:var(--line-dark);
  box-shadow:0 14px 34px -26px rgba(22,20,31,.75);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
@media (max-width:1023px){.nav-inner{height:62px}}
.brand{display:flex;flex-direction:column;gap:2px;color:var(--ink);text-decoration:none;line-height:1.15}
.brand-mark{font-size:19px;font-weight:800;letter-spacing:-.02em}
.brand-sub{font-size:12px;color:var(--muted);letter-spacing:.12em}
.site-header.is-scrolled .brand-mark{color:#F2F0EA}
.site-header.is-scrolled .brand-sub{color:var(--muted-dark)}
.site-header.is-scrolled .brand:hover .brand-mark{color:var(--lime)}
.main-nav{display:flex;align-items:center;gap:4px}
@media (max-width:1023px){.main-nav{display:none}}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--ink);
  position:relative;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--ink);background:var(--paper-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{font-weight:800}
.nav-link.is-active::after{transform:scaleX(1)}
.site-header.is-scrolled .nav-link{color:#F2F0EA}
.site-header.is-scrolled .nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-mega-wrap{position:relative}
.mega-trigger{font-family:inherit}
.mega-trigger i{font-size:11px;transition:transform .24s var(--ease)}
.nav-mega-wrap:hover .mega-trigger i,
.nav-mega-wrap:focus-within .mega-trigger i{transform:rotate(180deg)}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;width:760px;max-width:calc(100vw - 48px);
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:0 30px 60px -34px rgba(22,20,31,.45);
  padding:22px;opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.nav-mega-wrap:hover .mega-panel,
.nav-mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.mega-col-title{font-size:12px;letter-spacing:.12em;color:var(--muted);margin-bottom:10px;font-weight:700}
.mega-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 10px;border-radius:10px;color:var(--ink);font-size:14px;font-weight:600;
  transition:background .18s var(--ease)
}
.mega-link:hover{background:var(--paper-2);color:var(--ink)}
.mega-link i{color:var(--mist);font-size:12px;transition:transform .18s var(--ease)}
.mega-link:hover i{transform:translateX(3px)}
.mega-post{display:block;padding:9px 10px;border-radius:10px;transition:background .18s var(--ease)}
.mega-post:hover{background:var(--paper-2)}
.mega-post-title{font-size:14px;font-weight:600;color:var(--ink);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mega-post-date{font-family:var(--mono);font-size:12px;color:var(--muted);margin-top:3px}
.mega-foot{
  margin-top:18px;padding:14px 16px;border-radius:14px;background:var(--ink);color:#F2F0EA;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease)
}
.mega-foot:hover{color:#F2F0EA;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.mega-foot strong{font-size:15px;font-weight:800}
.mega-foot span{font-size:12px;color:var(--muted-dark);display:block;margin-top:2px}
.mega-foot i{color:var(--lime);transition:transform .24s var(--ease)}
.mega-foot:hover i{transform:translateX(4px)}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--line);background:var(--white);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .2s var(--ease)}
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .site-header.is-scrolled .nav-toggle{background:transparent;border-color:rgba(255,255,255,.2)}
  .site-header.is-scrolled .nav-toggle span{background:#F2F0EA}
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-3.5px) rotate(-45deg)}
.drawer{
  display:none;overflow:hidden;max-height:0;
  transition:max-height .3s var(--ease);
  background:var(--white);border-top:1px solid var(--line);
}
.drawer.is-open{max-height:620px}
@media (max-width:1023px){.drawer{display:block}}
.drawer-inner{padding:18px 20px 26px}
.drawer-title{font-size:12px;letter-spacing:.12em;color:var(--muted);font-weight:700;margin:14px 0 8px}
.drawer-link{display:block;padding:11px 12px;border-radius:10px;color:var(--ink);font-size:15px;font-weight:600}
.drawer-link:hover{background:var(--paper-2)}
.drawer-link.is-active{background:var(--paper-2);box-shadow:inset 3px 0 0 var(--lime)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;line-height:1;
  text-decoration:none;border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.btn i{transition:transform .24s var(--ease)}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-primary:hover{background:var(--ink);color:var(--lime);border-color:var(--ink);transform:translateY(-2px)}
.btn-primary:hover i{transform:translateX(4px)}
.btn-primary:active{transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-ghost i{transition:transform .24s var(--ease)}
.btn-ghost:hover i{transform:translateX(4px)}
.btn-sm{padding:11px 20px;font-size:14px}
.link-btn{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--ink);
  padding-bottom:3px;position:relative;
}
.link-btn::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.link-btn:hover::after{transform:scaleX(1)}
.link-btn:hover{color:var(--ink)}
.link-btn i{transition:transform .24s var(--ease);font-size:13px}
.link-btn:hover i{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.12em;
  border:1px solid var(--line);color:var(--muted);background:var(--white);
}
.badge-lime{border-color:var(--lime);background:rgba(200,247,81,.14);color:var(--ink)}
.badge-mist{border-color:rgba(111,99,201,.4);background:rgba(111,99,201,.08);color:var(--link)}
.badge-dark{border-color:var(--line-dark);background:rgba(255,255,255,.06);color:#F2F0EA}

/* ---------- hero ---------- */
.hero{position:relative;padding:64px 0 72px;overflow:hidden}
@media (min-width:1024px){.hero{padding:88px 0 96px}}
.hero::before{
  content:"最新版";
  position:absolute;right:-40px;top:20px;
  font-size:clamp(140px,22vw,320px);font-weight:800;letter-spacing:-.05em;
  color:rgba(22,20,31,.04);line-height:1;pointer-events:none;user-select:none;
}
.hero-grid{position:relative;z-index:1;align-items:center}
.hero-copy{max-width:620px}
.hero h1{
  font-size:clamp(30px,7vw,64px);
  line-height:1.08;letter-spacing:-.02em;font-weight:800;
  margin:20px 0 0;
}
@media (min-width:1024px){.hero h1{font-size:clamp(40px,5.2vw,64px)}}
.hero-sub{margin-top:18px;font-size:clamp(16px,1.5vw,19px);color:var(--muted);max-width:520px;line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:0;
  margin-top:42px;border-top:1px solid var(--line);
}
@media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,1fr)}}
.hero-stat{padding:16px 14px 0;position:relative}
.hero-stat+.hero-stat::before{
  content:"";position:absolute;left:0;top:16px;bottom:0;width:1px;background:var(--line);
}
@media (max-width:767px){
  .hero-stat:nth-child(3)::before{display:none}
  .hero-stat:nth-child(3),.hero-stat:nth-child(4){margin-top:6px}
}
.hero-stat dt{font-size:12px;color:var(--muted);letter-spacing:.06em}
.hero-stat dd{margin:5px 0 0;font-family:var(--mono);font-size:16px;font-weight:700;color:var(--ink)}
.hero-visual{position:relative;margin-top:34px}
@media (min-width:1024px){.hero-visual{margin-top:0}}
.hero-figure{
  border-radius:16px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);aspect-ratio:16/11;background:var(--paper-2);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.float-card{
  position:absolute;right:16px;bottom:-22px;
  background:var(--ink);color:#F2F0EA;
  padding:14px 18px;border-radius:14px;min-width:176px;
  box-shadow:0 24px 44px -26px rgba(22,20,31,.8);
  animation:floaty 4s ease-in-out infinite;
}
.float-card .fc-label{font-size:11px;letter-spacing:.12em;color:var(--muted-dark)}
.float-card .fc-value{font-family:var(--mono);font-size:20px;font-weight:700;color:var(--lime);margin-top:3px}
.float-card .fc-date{font-family:var(--mono);font-size:12px;color:var(--muted-dark);margin-top:2px}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* ---------- sections ---------- */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:100px 0}}
.section-dark{background:var(--ink);color:#F2F0EA}
.section-dark h2,.section-dark h3{color:#F2F0EA}
.section-dark p{color:var(--muted-dark)}
.section-tint{background:var(--paper-2)}
.sec-head{max-width:720px;margin-bottom:38px}
.sec-head h2{font-size:clamp(26px,3.6vw,40px);line-height:1.18}
.sec-head p{margin-top:14px;color:var(--muted);font-size:16px}
.section-dark .sec-head p{color:var(--muted-dark)}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:38px}
.eyebrow{font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--mist);margin-bottom:12px}

/* ---------- feature list ---------- */
.feature-layout{align-items:flex-start}
.feature-aside{position:sticky;top:110px}
@media (max-width:1023px){.feature-aside{position:static;margin-bottom:26px}}
.feature-aside h2{font-size:clamp(26px,3.4vw,38px);line-height:1.2;margin-bottom:16px}
.feature-aside p{color:var(--muted);margin-bottom:20px}
.feature-list{display:grid;gap:14px}
@media (min-width:768px){.feature-list{grid-template-columns:1fr 1fr}}
.feature-item{
  display:flex;align-items:center;gap:18px;
  padding:20px 22px;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r-card);
  transition:background .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.feature-item:hover{background:var(--paper-2);transform:translateY(-3px);border-color:rgba(200,247,81,.7)}
.feature-num{
  font-family:var(--mono);font-size:15px;font-weight:700;color:var(--mist);
  min-width:32px;transition:color .22s var(--ease)
}
.feature-item:hover .feature-num{color:var(--lime-deep)}
.feature-body{flex:1;min-width:0}
.feature-title{font-size:17px;font-weight:700;color:var(--ink);line-height:1.4}
.feature-desc{font-size:14px;color:var(--muted);margin-top:5px;line-height:1.65}
.feature-arrow{color:var(--muted);font-size:13px;transition:transform .22s var(--ease),color .22s var(--ease)}
.feature-item:hover .feature-arrow{transform:translateX(4px);color:var(--ink)}

/* ---------- dark stats ---------- */
.stat-band{display:grid;grid-template-columns:repeat(2,1fr)}
@media (min-width:768px){.stat-band{grid-template-columns:repeat(4,1fr)}}
.stat-cell{padding:30px 22px;position:relative}
.stat-cell+.stat-cell::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:1px;background:var(--line-dark)}
@media (max-width:767px){
  .stat-cell:nth-child(odd)::before{display:none}
  .stat-cell:nth-child(n+3){border-top:1px solid var(--line-dark)}
}
.stat-label{font-size:12px;letter-spacing:.12em;color:var(--muted-dark);font-weight:700}
.stat-value{font-family:var(--mono);font-size:clamp(36px,4vw,56px);font-weight:700;color:var(--lime);line-height:1.1;margin-top:12px;letter-spacing:-.03em}
.stat-note{font-size:13px;color:var(--muted-dark);margin-top:8px;line-height:1.6}

/* ---------- alternating story ---------- */
.story{display:grid;gap:26px;align-items:center;margin-bottom:52px}
@media (min-width:1024px){
  .story{grid-template-columns:1fr 1fr;gap:56px;margin-bottom:64px}
  .story.reverse .story-figure{order:2}
}
.story:last-child{margin-bottom:0}
.story-figure{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--paper-2)}
.story-figure img{width:100%;height:100%;object-fit:cover}
.story-text{max-width:100%}
@media (min-width:1024px){.story-text{max-width:92%}}
.story-text h3{font-size:clamp(20px,2.2vw,26px);margin-bottom:14px;line-height:1.3}
.story-text p{color:var(--muted)}
.story-points{margin-top:18px;display:grid;gap:10px}
.story-points li{display:flex;gap:10px;font-size:15px;color:var(--ink);align-items:flex-start}
.story-points li::before{content:"";width:8px;height:8px;background:var(--lime);flex:0 0 8px;margin-top:9px;border-radius:2px}

/* ---------- plans ---------- */
.plan-grid{display:grid;gap:20px}
@media (min-width:768px){.plan-grid{grid-template-columns:repeat(3,1fr)}}
.plan-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px;display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(200,247,81,.8)}
.plan-card.is-featured{background:var(--ink);color:#F2F0EA;border-color:var(--ink)}
.plan-card.is-featured h3{color:#F2F0EA}
.plan-card.is-featured .plan-desc{color:var(--muted-dark)}
.plan-tag{font-size:12px;letter-spacing:.12em;font-weight:700;color:var(--mist);margin-bottom:14px}
.plan-card.is-featured .plan-tag{color:var(--lime)}
.plan-card h3{font-size:21px;margin-bottom:10px}
.plan-desc{font-size:14px;color:var(--muted);line-height:1.7}
.plan-list{margin:20px 0 24px;display:grid;gap:11px}
.plan-list li{display:flex;gap:10px;font-size:14px;line-height:1.6;align-items:flex-start}
.plan-list li i{color:var(--lime-deep);font-size:13px;margin-top:4px}
.plan-card.is-featured .plan-list li i{color:var(--lime)}
.plan-list li.off{color:var(--muted);opacity:.65}
.plan-list li.off i{color:var(--muted)}
.plan-card .btn{margin-top:auto;justify-content:center}
.plan-card.is-featured .btn-primary{background:var(--lime);color:var(--ink)}

/* ---------- news cards ---------- */
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;color:var(--ink);text-decoration:none;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(200,247,81,.75);color:var(--ink)}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--paper-2);position:relative}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:20px 20px 18px;display:flex;flex-direction:column;flex:1;gap:10px}
.news-cat{
  align-self:flex-start;font-size:12px;font-weight:700;letter-spacing:.1em;
  padding:4px 11px;border-radius:999px;background:rgba(111,99,201,.1);color:var(--link);
}
.news-title{
  font-size:18px;font-weight:700;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-sum{
  font-size:14px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);
}
.news-date{font-family:var(--mono);font-size:12px;color:var(--muted)}
.news-more{font-size:13px;font-weight:700;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.news-card:hover .news-more i{transform:translateX(4px)}
.news-more i{transition:transform .24s var(--ease);font-size:12px;color:var(--mist)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;background:var(--white);
}
.empty-state i{font-size:26px;color:var(--mist);margin-bottom:14px;display:block}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:18px}

/* ---------- faq ---------- */
.faq-layout{gap:38px}
.faq-aside h2{font-size:clamp(24px,3.2vw,36px);margin-bottom:14px}
.faq-aside p{color:var(--muted);font-size:15px}
.faq-list{display:grid;gap:12px}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:border-color .22s var(--ease)}
.faq-item.is-open{border-color:rgba(200,247,81,.85)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 20px;text-align:left;font-size:17px;font-weight:700;color:var(--ink);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--lime);
  transform:scaleY(0);transform-origin:top;transition:transform .22s var(--ease);
}
.faq-item.is-open .faq-q::before{transform:scaleY(1)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--muted);transition:transform .22s var(--ease),background .22s var(--ease)}
.faq-icon::before{left:0;right:0;top:7px;height:2px}
.faq-icon::after{top:0;bottom:0;left:7px;width:2px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-icon::before{background:var(--ink)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a-inner{padding:0 20px 20px;max-width:640px}
.faq-a-inner p{font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- contact ---------- */
.contact-layout{gap:40px;align-items:flex-start}
.contact-info h2{font-size:clamp(24px,3.2vw,36px);margin-bottom:16px}
.contact-info p{color:var(--muted-dark);font-size:15px}
.contact-list{margin-top:26px;display:grid;gap:14px}
.contact-list li{display:flex;gap:14px;align-items:flex-start;color:#F2F0EA;font-size:15px}
.contact-list li i{color:var(--lime);margin-top:5px;width:16px;text-align:center}
.contact-list li span small{display:block;color:var(--muted-dark);font-size:13px;margin-top:2px}
.contact-form{background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--shadow)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 16px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--white);font-size:15px;font-family:inherit;color:var(--ink);
  transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:104px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--lime);background:rgba(200,247,81,.06);
  box-shadow:0 0 0 3px rgba(200,247,81,.22);
}
.field input.has-error,.field textarea.has-error{border-color:var(--warn)}
.field-error{font-size:13px;color:var(--warn);margin-top:6px;min-height:18px}
.checkline{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);line-height:1.6}
.checkline input{width:16px;height:16px;margin-top:4px;flex:0 0 16px}
.form-note{margin-top:14px;font-size:12px;color:var(--muted)}
.form-success{
  display:none;margin-top:16px;padding:12px 16px;border-radius:12px;
  background:rgba(158,211,43,.14);border:1px solid rgba(158,211,43,.5);
  font-size:14px;color:var(--ink);
}
.form-success.is-visible{display:block}
.form-cta{margin-top:20px;font-size:15px;font-weight:700;color:var(--ink)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F2F0EA;padding:64px 0 26px;margin-top:0}
.footer-brand{font-size:19px;font-weight:800;letter-spacing:-.02em;color:#F2F0EA}
.footer-desc{font-size:14px;color:var(--muted-dark);margin-top:14px;line-height:1.75;max-width:280px}
.footer-title{font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--muted-dark);margin-bottom:16px}
.footer-links{display:grid;gap:11px}
.footer-links a{color:#F2F0EA;font-size:14px;transition:color .2s var(--ease)}
.footer-links a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14px;color:#F2F0EA;line-height:1.7;margin-bottom:10px}
.footer-contact li small{display:block;color:var(--muted-dark);font-size:12px}
.footer-bottom{
  margin-top:52px;padding-top:20px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between;
  font-size:12px;color:var(--muted-dark);
}
.footer-bottom a{color:var(--muted-dark)}
.footer-bottom a:hover{color:var(--lime)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:translateY(0)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --ink:#16141F;
  --paper:#F7F5F0;
  --card:#FFFFFF;
  --lime:#C8F751;
  --lime-deep:#9ED32B;
  --violet:#6F63C9;
  --violet-deep:#4B3FBF;
  --line:#E7E3DA;
  --muted:#6B6875;
  --ink-soft:#F2F0EA;
  --ink-dim:#A8A4B8;
  --warn:#D9603B;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 18px 40px -24px rgba(22,20,31,.30);
  --shadow-lg:0 26px 54px -28px rgba(22,20,31,.42);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--violet-deep);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--ink)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{list-style:none;padding:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace}

/* ---------- 容器 ---------- */
.grid-container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:768px){.grid-container{padding-left:24px;padding-right:24px}}
@media (min-width:1440px){.grid-container{max-width:1280px;padding-left:32px;padding-right:32px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(247,245,240,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{background:rgba(247,245,240,.98);box-shadow:0 16px 36px -28px rgba(22,20,31,.55)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);min-width:0}
.brand-mark{font-size:19px;font-weight:800;letter-spacing:-.03em;line-height:1.2;white-space:nowrap}
.nav-mega-wrap{position:relative}
.main-nav{display:none}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--ink);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:var(--ink-soft);color:var(--ink)}
.nav-link.is-active{font-weight:800}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
  background:var(--lime);border-radius:2px;
}
.mega-trigger i{font-size:11px;color:var(--violet)}
.mega-panel{
  opacity:0;visibility:hidden;transform:translateY(-6px);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-lg);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
}
.mega-grid{display:grid;grid-template-columns:1fr;gap:22px}
.mega-col-title{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--muted);margin-bottom:8px}
.mega-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:10px;font-size:14.5px;color:var(--ink);transition:background .18s var(--ease)}
.mega-link i{font-size:11px;color:var(--violet);transition:transform .18s var(--ease)}
.mega-link:hover{background:var(--ink-soft)}
.mega-link:hover i{transform:translateX(3px)}
.mega-post{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 10px;border-radius:10px;font-size:14px;color:var(--muted);transition:background .18s var(--ease),color .18s var(--ease)}
.mega-post:hover{background:var(--ink-soft);color:var(--ink)}
.mega-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding:13px 18px;border-radius:14px;background:var(--ink);color:var(--lime);font-size:14px;font-weight:700;transition:transform .2s var(--ease)}
.mega-foot i{font-size:12px}
.mega-foot:hover{transform:translateY(-2px);color:var(--lime)}
.menu-toggle{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;flex:0 0 auto}
.menu-toggle span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:background .2s var(--ease)}
.menu-toggle span::before,
.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s var(--ease),top .22s var(--ease)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle.is-open span{background:transparent}
.menu-toggle.is-open span::before{top:0;transform:rotate(45deg)}
.menu-toggle.is-open span::after{top:0;transform:rotate(-45deg)}

@media (max-width:1023px){
  .main-nav.is-open{
    display:flex;flex-direction:column;align-items:stretch;gap:2px;
    position:absolute;left:0;right:0;top:100%;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    box-shadow:0 28px 44px -30px rgba(22,20,31,.55);
    padding:14px 20px 22px;
  }
  .mega-panel{position:static;display:none;width:auto;opacity:1;visibility:visible;transform:none;box-shadow:none;border-radius:14px;padding:16px;margin-top:8px}
  .nav-mega-wrap.is-open .mega-panel{display:block}
}
@media (min-width:1024px){
  .menu-toggle{display:none}
  .main-nav{display:flex;align-items:center;gap:6px}
  .mega-panel{
    position:absolute;top:calc(100% + 10px);right:0;width:660px;padding:22px;z-index:95;
  }
  .mega-grid{grid-template-columns:1.15fr 1fr}
  .nav-mega-wrap:hover .mega-panel,
  .nav-mega-wrap:focus-within .mega-panel,
  .nav-mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;line-height:1.1;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn i{font-size:13px;transition:transform .22s var(--ease)}
.btn-primary{background:var(--lime);color:var(--ink);border:1px solid var(--lime)}
.btn-primary:hover{background:var(--ink);color:var(--lime);border-color:var(--ink);transform:translateY(-2px)}
.btn-primary:hover i{transform:translateX(4px)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-secondary:hover{background:var(--ink);color:var(--paper)}
.btn-secondary:hover i{transform:translateX(-3px)}
.btn-block{width:100%}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.12em;background:var(--ink-soft);color:var(--ink)}
.badge-lime{background:rgba(200,247,81,.26);border:1px solid rgba(200,247,81,.85);color:#3F4A16}

/* ---------- 面包屑 ---------- */
.crumb-wrap{padding-top:22px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--ink)}
.crumb .sep{color:#C6C1B6}
.crumb .current{color:var(--ink);font-weight:700;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头 ---------- */
.article-head{padding:20px 0 34px}
.article-title{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.16;font-weight:800;letter-spacing:-.02em;
  margin-top:16px;max-width:920px;
  overflow-wrap:break-word;
}
.article-lead{
  font-size:17px;line-height:1.9;color:var(--muted);
  max-width:760px;margin-top:20px;padding-left:16px;
  border-left:3px solid var(--lime);
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:24px;font-size:13px;color:var(--muted)}
.article-meta .item{display:inline-flex;align-items:center;gap:6px}
.article-meta i{font-size:12px;color:var(--violet)}
.article-meta time{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:700;color:var(--ink)}
.meta-sep{width:1px;height:12px;background:var(--line)}
.article-cover{
  margin-top:8px;border-radius:16px;overflow:hidden;
  border:1px solid var(--line);aspect-ratio:16/9;background:var(--ink-soft);
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ---------- 主体两栏 ---------- */
.article-layout{padding:44px 0 0}
.article-layout-x{margin-left:-12px;margin-right:-12px}
.article-layout-x > .cell{padding-left:12px;padding-right:12px}

/* ---------- 正文排版 ---------- */
.article-body{
  max-width:760px;
  font-size:17px;line-height:1.9;color:var(--ink);
  overflow-wrap:break-word;
}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.36;
  margin:2.1em 0 .9em;letter-spacing:-.01em;
}
.article-body h2::before{content:"";display:block;width:36px;height:4px;border-radius:2px;background:var(--lime);margin-bottom:14px}
.article-body h3{font-size:20px;font-weight:700;line-height:1.5;margin:1.7em 0 .7em}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0}
.article-body ul{margin:0 0 1.2em}
.article-body ul li{position:relative;padding-left:24px;margin-bottom:.55em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--violet)}
.article-body ol{counter-reset:ol;margin:0 0 1.2em}
.article-body ol li{position:relative;padding-left:36px;margin-bottom:.6em;counter-increment:ol}
.article-body ol li::before{
  content:counter(ol,decimal-leading-zero);
  position:absolute;left:0;top:.42em;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;font-weight:700;color:var(--violet-deep);
}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;
  background:var(--ink-soft);border-left:3px solid var(--ink);
  border-radius:0 12px 12px 0;color:#3C3945;
}
.article-body img{border-radius:var(--r-img);border:1px solid var(--line);margin:1.6em 0}
.article-body a{color:var(--violet-deep);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(75,63,191,.38)}
.article-body a:hover{color:var(--ink)}
.article-body strong{font-weight:700}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;
  font-size:15px;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  margin:1.6em 0;
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.article-body thead th{background:var(--ink-soft);font-weight:700}
.article-body tbody tr:nth-child(even){background:#FBFAF7}
.article-body tr:last-child td{border-bottom:0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:-.8em;margin-bottom:1.6em}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:18px;margin-top:40px}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
.side-title{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--muted);margin-bottom:12px}
.side-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list span{color:var(--muted)}
.side-list b{font-weight:700;text-align:right;overflow-wrap:break-word}
.side-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 12px;border-radius:10px;font-size:14.5px;font-weight:500;color:var(--ink);transition:background .2s var(--ease)}
.side-link i{font-size:11px;color:var(--violet);transition:transform .2s var(--ease)}
.side-link:hover{background:var(--ink-soft)}
.side-link:hover i{transform:translateX(3px)}
.side-cta{background:var(--ink);border-radius:var(--r-card);padding:24px}
.side-cta-title{font-size:18px;font-weight:800;color:#F2F0EA}
.side-cta-text{font-size:14px;line-height:1.8;color:var(--ink-dim);margin:10px 0 18px}
@media (min-width:1024px){
  .article-side{position:sticky;top:104px;align-self:flex-start;margin-top:0}
}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);
  background:#FBFAF7;padding:56px 24px;text-align:center;
}
.empty-state i{display:block;font-size:28px;color:var(--violet);margin-bottom:14px}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:20px}

/* ---------- 文章尾部 ---------- */
.article-foot{margin:44px 0 0;padding-top:28px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- 相关推荐 ---------- */
.rel-section{padding:76px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:30px}
.section-title{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.01em;line-height:1.25}
.section-desc{font-size:15px;color:var(--muted);margin-top:10px}
.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
.post-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(200,247,81,.85)}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-soft)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{font-size:19px;font-weight:700;line-height:1.45}
.post-card p{font-size:14.5px;line-height:1.8;color:var(--muted);flex:1}
.post-card .foot{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;margin-top:4px}
.post-card .foot span{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.post-card .foot i{color:var(--violet);transition:transform .22s var(--ease)}
.post-card:hover .foot i{transform:translateX(4px)}
@media (min-width:641px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}

/* ---------- CTA ---------- */
.cta-section{padding:76px 0 88px}
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink);border-radius:24px;
  padding:clamp(30px,4vw,52px);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;background:rgba(200,247,81,.10);
}
.cta-band h2{font-size:clamp(23px,3vw,32px);font-weight:800;line-height:1.3;color:#F2F0EA;max-width:600px}
.cta-band p{font-size:15px;line-height:1.8;color:var(--ink-dim);margin-top:12px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}
.btn-ghost{background:transparent;color:#F2F0EA;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.10);color:#F2F0EA;border-color:rgba(255,255,255,.5)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--ink-soft);padding:64px 0 28px}
.footer-brand{font-size:20px;font-weight:800;letter-spacing:-.01em;color:#F2F0EA}
.footer-desc{font-size:14px;line-height:1.8;color:var(--ink-dim);margin-top:12px}
.footer-title{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--ink-dim);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14.5px;color:#DDD9CF}
.footer-links a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
.footer-contact li{display:flex;flex-direction:column;gap:2px;font-size:13px;color:var(--ink-dim);margin-bottom:14px}
.footer-contact li:last-child{margin-bottom:0}
.footer-contact small{font-size:14.5px;color:#DDD9CF;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  margin-top:34px;padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:var(--ink-dim);
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category1 */
:root{
  --ink:#16141F;
  --paper:#F7F5F0;
  --lime:#C8F751;
  --violet:#6F63C9;
  --violet-deep:#4B3FBF;
  --white:#FFFFFF;
  --line:#E7E3DA;
  --muted:#6B6875;
  --soft:#F2F0EA;
  --success:#9ED32B;
  --warn:#D9603B;
  --dark-text:#F2F0EA;
  --dark-muted:#A8A4B8;
  --radius-card:18px;
  --radius-img:14px;
  --radius-btn:12px;
  --shadow:0 18px 40px -24px rgba(22,20,31,.30);
  --shadow-hover:0 26px 52px -24px rgba(22,20,31,.42);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--violet-deep);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--ink);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.015em;}
section[id],div[id]{scroll-margin-top:112px;}

.grid-container{max-width:1232px;width:100%;margin-left:auto;margin-right:auto;padding-left:24px;padding-right:24px;}
@media (min-width:1440px){
  .grid-container{max-width:1312px;padding-left:32px;padding-right:32px;}
}
.grid-x.grid-margin-x{margin-left:-14px;margin-right:-14px;}
.grid-x.grid-margin-x>.cell{padding-left:14px;padding-right:14px;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,240,.96);
  border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(22,20,31,.94);
  border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 14px 34px -26px rgba(22,20,31,.75);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:78px;}
.brand{display:flex;flex-direction:column;line-height:1.1;text-decoration:none;}
.brand-main{font-size:18px;font-weight:800;letter-spacing:-.02em;color:var(--ink);transition:color .24s var(--ease);}
.brand-sub{font-size:11px;letter-spacing:.14em;color:var(--muted);margin-top:4px;transition:color .24s var(--ease);}
.site-header.is-scrolled .brand-main{color:var(--dark-text);}
.site-header.is-scrolled .brand-sub{color:var(--dark-muted);}

.main-nav{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;font-size:15px;font-weight:600;color:var(--ink);
  background:none;border:0;border-radius:10px;cursor:pointer;
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{background:rgba(22,20,31,.06);transform:translateY(-1px);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{font-weight:800;}
.nav-link.is-active::after{transform:scaleX(1);}
.site-header.is-scrolled .nav-link{color:var(--dark-text);}
.site-header.is-scrolled .nav-link:hover{background:rgba(255,255,255,.09);}

.nav-mega-wrap{position:relative;}
.nav-mega-wrap .fa-chevron-down{font-size:11px;opacity:.7;transition:transform .2s var(--ease);}
.nav-mega-wrap:hover .fa-chevron-down{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 12px);width:700px;z-index:90;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:0 34px 66px -34px rgba(22,20,31,.42);
  padding:24px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.nav-mega-wrap:hover .mega-panel,
.nav-mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.mega-col-title{margin:0 0 12px;font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--muted);}
.mega-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 12px;border-radius:10px;font-size:14px;font-weight:600;color:var(--ink);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.mega-link i{font-size:11px;color:var(--muted);transition:transform .2s var(--ease),color .2s var(--ease);}
.mega-link:hover{background:var(--soft);color:var(--ink);}
.mega-link:hover i{transform:translateX(3px);color:var(--violet-deep);}
.mega-post{display:flex;flex-direction:column;gap:4px;padding:9px 12px;border-radius:10px;transition:background .2s var(--ease);}
.mega-post:hover{background:var(--soft);}
.mega-post-title{font-size:14px;font-weight:600;color:var(--ink);line-height:1.5;}
.mega-post-date{font-size:12px;color:var(--muted);font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;}
.mega-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:20px;padding:14px 18px;border-radius:12px;background:var(--ink);color:var(--dark-text);
}
.mega-foot span{font-size:14px;font-weight:700;}
.mega-foot i{color:var(--lime);transition:transform .2s var(--ease);}
.mega-foot:hover{color:var(--dark-text);}
.mega-foot:hover i{transform:translateX(4px);}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--white);cursor:pointer;position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle span:first-child{top:17px;}
.nav-toggle span:last-child{top:25px;}
.nav-toggle.is-open span:first-child{transform:translateY(4px) rotate(45deg);}
.nav-toggle.is-open span:last-child{transform:translateY(-4px) rotate(-45deg);}

/* ---------- badge / buttons ---------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.12em;
  padding:7px 14px;border-radius:999px;
  border:1px solid var(--lime);color:var(--ink);background:rgba(200,247,81,.16);
}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-size:15px;font-weight:700;line-height:1;
  padding:15px 26px;border-radius:var(--radius-btn);
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn i{transition:transform .2s var(--ease);}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px);box-shadow:var(--shadow);}
.btn-primary:hover i{transform:translateX(4px);}
.btn-primary:active{transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px);}
.btn-text{
  background:none;border:0;padding:6px 0;color:var(--ink);font-weight:700;font-size:15px;
  display:inline-flex;align-items:center;gap:8px;position:relative;
}
.btn-text::after{
  content:"";position:absolute;left:0;right:26px;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1);}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  padding:52px 0 56px;background:var(--paper);
  border-bottom:1px solid var(--line);
}
.page-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(22,20,31,.05) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(22,20,31,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.85),transparent 92%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.85),transparent 92%);
}
.page-head .grid-container{position:relative;z-index:1;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:26px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--violet-deep);}
.breadcrumb .sep{color:#C9C4BA;}
.breadcrumb .current{font-weight:700;color:var(--ink);}
.page-head h1{
  font-size:clamp(34px,4.6vw,58px);line-height:1.08;letter-spacing:-.02em;
  margin:18px 0 16px;font-weight:800;
}
.page-head-lead{font-size:17px;color:var(--muted);max-width:600px;margin:0 0 30px;}
.page-head-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;}

/* ---------- stat band ---------- */
.stat-band{background:var(--ink);color:var(--dark-text);padding:56px 0;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-item{padding:6px 26px;border-left:1px solid rgba(255,255,255,.10);}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  display:block;font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  font-size:clamp(34px,3.6vw,50px);font-weight:700;line-height:1;color:var(--lime);letter-spacing:-.03em;
}
.stat-label{display:block;margin:14px 0 8px;font-size:12px;letter-spacing:.12em;color:var(--dark-muted);}
.stat-item p{font-size:13px;color:var(--dark-muted);margin:0;line-height:1.7;}

/* ---------- content shell ---------- */
.content-shell{padding:72px 0 24px;}
.sidebar-inner{position:sticky;top:112px;}
.sidebar-title{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--muted);margin:0 0 16px;}
.side-link{
  display:flex;align-items:center;gap:10px;
  padding:10px 14px;border-radius:10px;font-size:14px;font-weight:600;color:var(--ink);
  border-left:2px solid var(--line);
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.side-link:hover{background:var(--soft);border-left-color:var(--lime);transform:translateX(2px);color:var(--ink);}

.block{margin-bottom:76px;}
.block:last-child{margin-bottom:40px;}
.block-title{font-size:clamp(26px,2.6vw,34px);margin:0 0 20px;position:relative;padding-left:22px;}
.block-title::before{
  content:"";position:absolute;left:0;top:.42em;width:14px;height:3px;border-radius:3px;background:var(--lime);
}
.block-lead{font-size:16px;color:var(--muted);max-width:660px;margin:0 0 34px;}

.feature-split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.feature-split .prose p{font-size:16.5px;line-height:1.9;}
.figure{position:relative;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:var(--white);}
.figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.figure figcaption{padding:12px 16px;font-size:13px;color:var(--muted);border-top:1px solid var(--line);background:var(--white);}

/* ---------- numbered list ---------- */
.num-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.num-item{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;
  transition:background .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.num-item:hover{background:var(--soft);transform:translateY(-3px);border-color:rgba(200,247,81,.85);box-shadow:var(--shadow);}
.num-index{
  font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  font-size:20px;font-weight:700;color:var(--violet);line-height:1.2;flex:0 0 auto;
  transition:color .2s var(--ease);
}
.num-item:hover .num-index{color:var(--lime);}
.num-item h3{font-size:18px;margin:0 0 8px;}
.num-item p{font-size:14px;color:var(--muted);margin:0;line-height:1.75;}

/* ---------- gallery ---------- */
.gallery-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.gallery-item{border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:var(--white);transition:transform .24s var(--ease),box-shadow .24s var(--ease);}
.gallery-item:nth-child(even){margin-top:52px;}
.gallery-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.gallery-item img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.gallery-item figcaption{padding:14px 18px;font-size:14px;color:var(--muted);}

/* ---------- faq ---------- */
.faq-list{margin-top:6px;}
.faq-item{
  background:var(--white);border:1px solid var(--line);border-left:3px solid var(--line);
  border-radius:14px;margin-bottom:12px;padding:0 22px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{box-shadow:var(--shadow);}
.faq-item.is-open{border-left-color:var(--lime);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:none;border:0;padding:20px 0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--ink);line-height:1.5;
}
.faq-q:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px;}
.faq-mark{position:relative;width:16px;height:16px;flex:0 0 auto;}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
  transition:transform .24s var(--ease),background .24s var(--ease);
}
.faq-mark::before{left:0;right:0;top:7px;height:2px;}
.faq-mark::after{top:0;bottom:0;left:7px;width:2px;}
.faq-item.is-open .faq-mark::after{transform:scaleY(0);}
.faq-item.is-open .faq-mark::before{background:var(--violet-deep);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-item.is-open .faq-a{max-height:460px;}
.faq-a-inner{max-width:640px;padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--muted);}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink);color:var(--dark-text);padding:72px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.cta-eyebrow{font-size:12px;letter-spacing:.12em;color:var(--dark-muted);margin:0 0 14px;}
.cta-inner h2{font-size:clamp(24px,2.6vw,34px);color:var(--dark-text);margin:0 0 14px;}
.cta-inner p{font-size:15px;color:var(--dark-muted);max-width:560px;margin:0;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-text);padding:72px 0 0;}
.site-footer .grid-x>.cell{padding-left:12px;padding-right:12px;}
.footer-brand{font-size:20px;font-weight:800;color:var(--dark-text);margin:0 0 12px;letter-spacing:-.02em;}
.footer-desc{font-size:14px;color:var(--dark-muted);line-height:1.8;margin:0;max-width:300px;}
.footer-title{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--dark-muted);margin:0 0 16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:var(--dark-text);font-size:14px;transition:color .2s var(--ease);}
.footer-links a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:3px;}
.footer-contact{list-style:none;display:flex;flex-direction:column;gap:12px;font-size:13px;color:var(--dark-muted);}
.footer-contact li{display:flex;flex-direction:column;gap:2px;}
.footer-contact small{font-size:14px;color:var(--dark-text);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  border-top:1px solid rgba(255,255,255,.10);margin-top:40px;padding:22px 0 28px;
  font-size:12px;color:var(--dark-muted);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .header-inner{min-height:64px;}
  .nav-toggle{display:inline-flex;z-index:100;}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);
    background:var(--white);flex-direction:column;align-items:stretch;gap:4px;
    padding:92px 22px 40px;overflow-y:auto;
    transform:translateX(102%);transition:transform .28s var(--ease);
    box-shadow:-24px 0 48px -32px rgba(22,20,31,.55);z-index:95;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{color:var(--ink);padding:13px 14px;font-size:16px;border-radius:12px;}
  .site-header.is-scrolled .nav-link{color:var(--ink);}
  .site-header.is-scrolled .nav-link:hover{background:var(--soft);}
  .nav-link::after{left:14px;right:auto;width:26px;bottom:8px;}
  .mega-panel{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-radius:0;padding:4px 0 10px;display:none;
  }
  .nav-mega-wrap.is-open .mega-panel{display:block;}
  .mega-grid{grid-template-columns:1fr;gap:18px;}
  .feature-split{grid-template-columns:1fr;gap:28px;}
  .stat-grid{grid-template-columns:1fr 1fr;gap:28px 0;}
  .stat-item{padding:0 20px;}
  .stat-item:nth-child(odd){border-left:0;padding-left:0;}
  .content-shell{padding:52px 0 8px;}
  .sidebar{margin-bottom:34px;}
  .sidebar-inner{position:static;}
  .sidebar-title{display:none;}
  .sidebar-inner .side-link{display:inline-flex;border-left:0;border:1px solid var(--line);background:var(--white);border-radius:999px;white-space:nowrap;}
  .sidebar-inner{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;}
  .sidebar-inner::-webkit-scrollbar{height:4px;}
  .sidebar-inner::-webkit-scrollbar-thumb{background:#D8D3C8;border-radius:4px;}
  .faq-item{padding:0 18px;}
}
@media (max-width:767px){
  .page-head{padding:34px 0 40px;}
  .page-head-lead{font-size:16px;}
  .num-list{grid-template-columns:1fr;}
  .gallery-grid{grid-template-columns:1fr;}
  .gallery-item:nth-child(even){margin-top:0;}
  .block{margin-bottom:56px;}
  .stat-band{padding:44px 0;}
  .cta-band{padding:52px 0;}
  .cta-inner{gap:26px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:519px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .page-head h1{font-size:30px;}
  .btn{padding:14px 20px;font-size:14px;}
  .page-head-actions{gap:12px;}
  .stat-grid{grid-template-columns:1fr;gap:26px;}
  .stat-item{padding:0;border-left:0;}
  .num-item{padding:18px;gap:14px;}
  .faq-q{font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink:#16141F;
  --ink-2:#1E1B2A;
  --paper:#F7F5F0;
  --paper-2:#F2F0EA;
  --lime:#C8F751;
  --violet:#6F63C9;
  --link:#4B3FBF;
  --line:#E7E3DA;
  --muted:#6B6875;
  --white:#FFFFFF;
  --ok:#9ED32B;
  --warn:#D9603B;
  --radius-card:18px;
  --radius-img:14px;
  --radius-btn:12px;
  --shadow:0 18px 40px -24px rgba(22,20,31,.30);
  --shadow-hover:0 26px 52px -26px rgba(22,20,31,.42);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--link);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--ink)}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}

.grid-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:768px){.grid-container{padding-left:24px;padding-right:24px}}
@media (min-width:1440px){.grid-container{max-width:1280px;padding-left:32px;padding-right:32px}}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,240,.96);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(22,20,31,.94);
  border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 12px 32px -20px rgba(22,20,31,.85);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px}
.brand{display:flex;flex-direction:column;justify-content:center;gap:2px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-main{font-size:19px;font-weight:800;letter-spacing:-.01em;line-height:1.2;transition:color .2s var(--ease)}
.brand-sub{font-size:11px;letter-spacing:.12em;color:var(--muted);transition:color .2s var(--ease)}
.site-header.is-scrolled .brand-main{color:#F2F0EA}
.site-header.is-scrolled .brand-sub{color:#A8A4B8}

.nav-collapse{display:flex;align-items:center;gap:22px}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 12px;
  font-size:15px;font-weight:600;color:var(--ink);
  background:none;border:0;border-radius:8px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.nav-link:hover{color:var(--ink);transform:translateY(-1px)}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--lime);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{font-weight:800}
.nav-link.is-active::after{transform:scaleX(1)}
.site-header.is-scrolled .nav-link{color:#F2F0EA}
.site-header.is-scrolled .nav-link.is-active{color:#FFFFFF}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-btn);
  background:var(--ink);color:#F2F0EA;font-size:14px;font-weight:700;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.nav-cta:hover{background:var(--lime);color:var(--ink);transform:translateY(-2px)}
.site-header.is-scrolled .nav-cta{background:var(--lime);color:var(--ink)}
.site-header.is-scrolled .nav-cta:hover{background:#FFFFFF;color:var(--ink)}

.nav-toggle{
  display:none;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:transparent;position:relative;flex:0 0 auto;
}
.nav-toggle span{
  position:absolute;left:13px;right:13px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease),background .2s var(--ease);
}
.nav-toggle span:nth-child(1){top:18px}
.nav-toggle span:nth-child(2){top:24px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(3px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-3px) rotate(-45deg)}
.site-header.is-scrolled .nav-toggle{border-color:rgba(255,255,255,.22)}
.site-header.is-scrolled .nav-toggle span{background:#F2F0EA}

/* Mega */
.nav-mega-wrap{position:relative}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;
  width:760px;max-width:calc(100vw - 48px);
  background:var(--white);border:1px solid var(--line);border-radius:18px;
  box-shadow:0 32px 70px -34px rgba(22,20,31,.45);
  padding:24px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  transition-delay:.15s;
}
.nav-mega-wrap:hover .mega-panel,
.nav-mega-wrap:focus-within .mega-panel,
.nav-mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);transition-delay:0s}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.mega-col-title{font-size:12px;letter-spacing:.12em;color:var(--muted);margin-bottom:8px}
.mega-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 10px;border-radius:10px;color:var(--ink);font-size:14px;font-weight:600;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.mega-link i{font-size:11px;color:var(--muted);transition:transform .18s var(--ease),color .18s var(--ease)}
.mega-link:hover{background:var(--paper-2);color:var(--ink)}
.mega-link:hover i{transform:translateX(3px);color:var(--violet)}
.mega-post{
  display:flex;flex-direction:column;gap:2px;
  padding:9px 10px;border-radius:10px;color:var(--ink);
  transition:background .18s var(--ease);
}
.mega-post:hover{background:var(--paper-2)}
.mega-post-title{font-size:14px;font-weight:600;line-height:1.5}
.mega-post-date{font-size:12px;color:var(--muted);font-family:ui-monospace,Menlo,Consolas,monospace}
.mega-cta{
  grid-column:1 / -1;margin-top:18px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 18px;border-radius:14px;background:var(--ink);color:#F2F0EA;
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.mega-cta:hover{transform:translateY(-2px);background:var(--ink-2);color:#fff}
.mega-cta strong{font-size:15px;font-weight:700}
.mega-cta span{font-size:13px;color:#A8A4B8;display:block;font-weight:400;margin-top:2px}
.mega-cta i{color:var(--lime);transition:transform .2s var(--ease)}
.mega-cta:hover i{transform:translateX(4px)}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn i{transition:transform .2s var(--ease)}
.btn-primary{background:var(--lime);color:var(--ink);box-shadow:0 14px 30px -20px rgba(22,20,31,.55)}
.btn-primary:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px)}
.btn-primary:hover i{transform:translateX(4px)}
.btn-primary:active{transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-ghost-dark{background:transparent;color:#F2F0EA;border-color:rgba(255,255,255,.35)}
.btn-ghost-dark:hover{background:#F2F0EA;color:var(--ink);border-color:#F2F0EA}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 0;background:none;border:0;color:var(--ink);font-weight:700;font-size:15px;
  position:relative;
}
.btn-text::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1)}
.btn-text:hover i{transform:translateX(4px)}
.btn-text i{transition:transform .22s var(--ease)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed}

/* ============ Hero Banner ============ */
.page-hero{position:relative;background:var(--ink);overflow:hidden}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(140deg,rgba(22,20,31,.86) 0%,rgba(22,20,31,.62) 52%,rgba(22,20,31,.88) 100%);
}
.hero-inner{position:relative;z-index:2;padding-top:104px;padding-bottom:112px;max-width:880px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;border:1px solid var(--lime);
  color:var(--lime);font-size:12px;letter-spacing:.12em;margin-bottom:22px;
}
.hero-badge i{font-size:11px}
.page-hero h1{
  color:#F7F5F0;
  font-size:clamp(32px,5.2vw,56px);
  line-height:1.1;letter-spacing:-.02em;
  margin-bottom:18px;
}
.hero-sub{color:#D9D5E2;font-size:clamp(15px,1.4vw,18px);line-height:1.8;max-width:640px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-breadcrumb{
  position:absolute;left:0;right:0;bottom:22px;z-index:3;
  padding-left:20px;padding-right:20px;
}
@media (min-width:768px){.hero-breadcrumb{padding-left:24px;padding-right:24px}}
@media (min-width:1440px){.hero-breadcrumb{padding-left:32px;padding-right:32px}}
.hero-breadcrumb .breadcrumb{max-width:1200px;margin:0 auto}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(242,240,234,.72)}
.breadcrumb a{color:rgba(242,240,234,.72)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb .sep{color:rgba(242,240,234,.4)}
.breadcrumb .current{color:#F7F5F0;font-weight:700}

/* Hero meta strip */
.hero-meta{background:var(--ink-2);border-top:1px solid rgba(255,255,255,.10)}
.hero-meta-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.hero-meta-item{padding:20px 22px;border-right:1px solid rgba(255,255,255,.10)}
.hero-meta-item:last-child{border-right:0}
.hero-meta-label{font-size:12px;letter-spacing:.12em;color:#A8A4B8;margin-bottom:4px}
.hero-meta-value{font-size:15px;font-weight:700;color:#F2F0EA;font-family:ui-monospace,Menlo,Consolas,monospace}
.hero-meta-value em{font-style:normal;color:var(--lime)}

/* ============ Sections ============ */
.section{padding:96px 0}
.section-alt{background:var(--paper-2)}
.section-dark{background:var(--ink);color:#F2F0EA}
.section-head{max-width:720px;margin-bottom:48px}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.12em;color:var(--violet);
  margin-bottom:12px;font-weight:700;
}
.section-dark .eyebrow{color:var(--lime)}
.section h2{font-size:clamp(24px,3vw,38px);letter-spacing:-.01em;margin-bottom:14px;line-height:1.22}
.section-head p{color:var(--muted);font-size:16px}
.section-dark .section-head p{color:#A8A4B8}
.section-dark h2{color:#F7F5F0}

/* Timeline */
.timeline{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--line)}
.tl-item{padding:26px 20px 10px 0;border-right:1px solid var(--line);position:relative}
.tl-item:last-child{border-right:0;padding-right:0}
.tl-num{
  font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:22px;font-weight:700;color:var(--violet);margin-bottom:12px;display:block;
}
.tl-item:hover .tl-num{color:var(--lime)}
.tl-item::before{
  content:"";position:absolute;top:-1px;left:0;width:26px;height:3px;background:var(--line);
  transition:background .22s var(--ease);
}
.tl-item:hover::before{background:var(--lime)}
.tl-title{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.45}
.tl-text{font-size:14px;color:var(--muted);line-height:1.75}

/* Prep cards */
.prep-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prep-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px 26px;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.prep-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(200,247,81,.6)}
.prep-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--paper-2);color:var(--violet);font-size:17px;margin-bottom:18px;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.prep-card:hover .prep-icon{background:var(--lime);color:var(--ink)}
.prep-card h3{font-size:19px;margin-bottom:10px}
.prep-card p{font-size:15px;color:var(--muted);line-height:1.8}

/* Feature rows */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.feature-row + .feature-row{margin-top:88px}
.feature-row.is-reverse .feature-media{order:2}
.feature-row.is-reverse .feature-copy{order:1}
.feature-media{
  border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:4 / 3;background:var(--paper-2);
}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.feature-media:hover img{transform:scale(1.03)}
.feature-copy h3{font-size:clamp(21px,2.2vw,27px);margin-bottom:14px;line-height:1.3}
.feature-copy > p{color:var(--muted);margin-bottom:20px}
.check-list li{
  position:relative;padding-left:26px;margin-bottom:12px;font-size:15px;line-height:1.8;
}
.check-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:8px;height:8px;background:var(--lime);
  border-radius:2px;
}
.check-list li strong{font-weight:700}

/* Dark stats */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(255,255,255,.10)}
.stat-item{padding:30px 24px;border-right:1px solid rgba(255,255,255,.10)}
.stat-item:last-child{border-right:0}
.stat-label{font-size:12px;letter-spacing:.12em;color:#A8A4B8;margin-bottom:10px}
.stat-num{
  font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:clamp(30px,3.4vw,46px);font-weight:700;color:var(--lime);line-height:1.1;margin-bottom:10px;
}
.stat-num small{font-size:15px;color:#F2F0EA;font-weight:600;margin-left:6px;letter-spacing:.02em}
.stat-note{font-size:13px;color:#A8A4B8;line-height:1.75}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:320px 1fr;gap:56px;align-items:start}
.faq-side h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:12px;line-height:1.3}
.faq-side p{font-size:15px;color:var(--muted);line-height:1.8}
.faq-list{display:block}
.faq-item{
  background:var(--white);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item:hover{border-color:rgba(200,247,81,.65)}
.faq-item[open]{box-shadow:var(--shadow)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px 20px 24px;font-size:17px;font-weight:700;line-height:1.55;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--lime);
  transform:scaleY(0);transform-origin:top;transition:transform .2s var(--ease);
}
.faq-item[open] summary::before{transform:scaleY(1)}
.faq-mark{
  flex:0 0 auto;width:28px;height:28px;border:1px solid var(--line);border-radius:999px;
  display:grid;place-items:center;font-size:17px;line-height:1;color:var(--muted);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.faq-mark::before{content:"+"}
.faq-item[open] .faq-mark{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.faq-item[open] .faq-mark::before{content:"−"}
.faq-answer{padding:0 24px 22px 24px;max-width:660px;font-size:15px;line-height:1.85;color:var(--muted)}

/* CTA band */
.cta-band{background:var(--ink);color:#F2F0EA;padding:72px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-copy{max-width:620px}
.cta-copy h2{font-size:clamp(23px,2.8vw,34px);color:#F7F5F0;margin-bottom:12px}
.cta-copy p{color:#A8A4B8;font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-note{width:100%;font-size:13px;color:#A8A4B8;border-top:1px solid rgba(255,255,255,.10);padding-top:16px;margin-top:8px}

/* Footer */
.site-footer{background:var(--ink);color:#F2F0EA;padding:72px 0 26px}
.footer-brand{font-size:19px;font-weight:800;letter-spacing:-.01em;color:#F7F5F0;margin-bottom:12px}
.footer-desc{font-size:14px;color:#A8A4B8;line-height:1.8}
.footer-title{font-size:13px;letter-spacing:.12em;color:#A8A4B8;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:#E4E1EC;font-size:14px}
.footer-links a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14px;color:#A8A4B8;margin-bottom:10px}
.footer-contact small{display:block;color:#E4E1EC;font-size:14px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);margin-top:32px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12px;color:#A8A4B8;
}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .section{padding:76px 0}
  .faq-wrap{grid-template-columns:1fr;gap:32px}
  .feature-row{gap:36px}
  .prep-grid{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(3,1fr)}
  .tl-item:nth-child(3n){border-right:0}
  .hero-inner{padding-top:88px;padding-bottom:96px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item:nth-child(2n){border-right:0}
  .stat-item:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.10)}
  .hero-meta-grid{grid-template-columns:repeat(2,1fr)}
  .hero-meta-item:nth-child(2n){border-right:0}
  .hero-meta-item:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.10)}
}
@media (max-width:900px){
  .nav-toggle{display:block}
  .nav-collapse{
    position:fixed;inset:74px 0 0 0;
    background:var(--paper);
    flex-direction:column;align-items:stretch;gap:0;
    padding:22px 20px 40px;
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform .26s var(--ease);
    border-top:1px solid var(--line);
  }
  .nav-collapse.is-open{transform:translateX(0)}
  .main-nav{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-link{
    width:100%;justify-content:space-between;padding:15px 4px;
    border-bottom:1px solid var(--line);border-radius:0;font-size:16px;
  }
  .nav-link::after{left:4px;right:auto;width:26px;bottom:8px}
  .nav-link:hover{transform:none}
  .nav-mega-wrap{width:100%}
  .mega-panel{
    position:static;width:100%;max-width:none;
    opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-radius:0;padding:6px 0 18px;
    display:none;
  }
  .nav-mega-wrap.is-open .mega-panel{display:block}
  .mega-grid{grid-template-columns:1fr;gap:16px}
  .nav-cta{margin-top:22px;justify-content:center}
  .site-header.is-scrolled .nav-collapse{background:var(--ink)}
  .site-header.is-scrolled .nav-link{color:#F2F0EA;border-bottom-color:rgba(255,255,255,.10)}
  .site-header.is-scrolled .mega-col-title{color:#A8A4B8}
  .site-header.is-scrolled .mega-link,
  .site-header.is-scrolled .mega-post-title{color:#F2F0EA}
  .site-header.is-scrolled .mega-link:hover,
  .site-header.is-scrolled .mega-post:hover{background:rgba(255,255,255,.06)}
  body.nav-open{overflow:hidden}
}
@media (max-width:768px){
  .section{padding:60px 0}
  .feature-row{grid-template-columns:1fr;gap:26px}
  .feature-row.is-reverse .feature-media{order:0}
  .feature-row.is-reverse .feature-copy{order:0}
  .feature-row + .feature-row{margin-top:60px}
  .prep-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .tl-item{border-right:0;border-bottom:1px solid var(--line);padding:20px 0}
  .tl-item::before{top:0}
  .hero-inner{padding-top:72px;padding-bottom:86px}
  .hero-breadcrumb{bottom:16px}
  .cta-band{padding:56px 0}
  .footer-bottom{margin-top:24px}
}
@media (max-width:520px){
  .timeline{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .stat-item{border-right:0;border-bottom:1px solid rgba(255,255,255,.10)}
  .hero-meta-grid{grid-template-columns:1fr}
  .hero-meta-item{border-right:0}
  .btn{width:100%;justify-content:center}
  .hero-actions{flex-direction:column;align-items:stretch}
  .cta-actions{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  html{scroll-behavior:auto}
}