:root{
  --paper:#F4F1E8;--paper2:#ECE8DD;--white:#FFFDF7;--ink:#111111;--text:#1D1D1D;
  --muted:#62605B;--soft:#89867E;--lime:#D7FF32;--acid:#B9F227;--blue:#2457FF;
  --orange:#FF5938;--dark:#161616;--line:rgba(17,17,17,.22);--strong:rgba(17,17,17,.72);
  --shadow:0 16px 36px rgba(30,28,22,.08);--max:1280px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  font-size:17px;line-height:1.78;overflow-x:hidden
}
body.drawer-open{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
button,input,textarea{font:inherit}
.container{width:min(var(--max),calc(100% - 48px));margin-inline:auto}

.site-header{
  position:sticky;top:0;width:100%;z-index:9999;background:rgba(244,241,232,.96);
  border-bottom:1px solid var(--strong)
}
.header-inner{
  max-width:var(--max);margin:0 auto;min-height:72px;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:24px
}
.site-logo{display:flex;align-items:center;flex:0 0 auto}
.site-logo img{max-height:44px;max-width:160px}
.nav-core{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-core a{
  text-decoration:none;padding:8px 2px;border-bottom:2px solid transparent;
  font-size:15px;font-weight:650;white-space:nowrap
}
.nav-core a:hover,.nav-core a.active{border-bottom-color:var(--ink)}
.header-actions{display:flex;align-items:center;gap:12px}
.main-btn,.outline-btn{
  display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;
  text-decoration:none;border:1px solid var(--ink);border-radius:4px;font-weight:750;transition:.18s ease
}
.main-btn{background:var(--ink);color:#fff}
.main-btn:hover{background:var(--lime);color:var(--ink)}
.outline-btn{background:transparent}
.outline-btn:hover{background:var(--white)}
.menu-trigger{
  width:46px;height:46px;padding:10px;border:1px solid var(--ink);background:transparent;
  display:grid;align-content:center;gap:5px;cursor:pointer
}
.menu-trigger span{display:block;height:2px;background:var(--ink)}
.menu-trigger span:nth-child(2){width:70%}
.menu-trigger-mobile{display:none}

.drawer-overlay{
  position:fixed;inset:0;z-index:10000;background:rgba(17,17,17,.55);opacity:0;transition:opacity .22s
}
.drawer-overlay.show{opacity:1}
.site-drawer{
  position:fixed;z-index:10001;top:0;right:0;width:min(520px,94vw);height:100dvh;
  background:var(--ink);color:var(--paper);transform:translateX(104%);transition:transform .25s ease;
  overflow:auto;padding:28px 34px 42px
}
.site-drawer.open{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(244,241,232,.35);
  padding-bottom:18px
}
.drawer-kicker{letter-spacing:.16em;font-size:12px;color:var(--lime);font-weight:800}
.drawer-close{
  border:1px solid rgba(244,241,232,.55);background:transparent;color:var(--paper);
  padding:7px 12px;cursor:pointer
}
.drawer-nav{display:grid;margin-top:14px}
.drawer-nav a{
  text-decoration:none;color:var(--paper);font-size:clamp(20px,4vw,31px);font-weight:800;line-height:1.2;
  padding:13px 0;border-bottom:1px solid rgba(244,241,232,.18);display:flex;gap:16px
}
.drawer-nav a span{color:var(--blue);font-size:12px;padding-top:7px;letter-spacing:.1em}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--lime)}
.drawer-note{font-size:14px;color:#c9c6bb;margin-top:28px}

.eyebrow{
  display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.15em;font-weight:850;
  text-transform:uppercase;color:var(--muted)
}
.eyebrow .dot{width:9px;height:9px;background:var(--lime);border:1px solid var(--ink)}
.section-index{color:var(--blue);font-weight:850;letter-spacing:.08em}
.accent-label{
  display:inline-block;background:var(--lime);color:var(--ink);padding:4px 8px;
  font-size:12px;font-weight:850;letter-spacing:.08em
}
.text-link{color:var(--blue);font-weight:700;text-decoration-thickness:1px;text-underline-offset:4px}
.section-title{
  font-size:clamp(36px,5vw,66px);line-height:.98;letter-spacing:-.045em;margin:12px 0 24px;
  color:var(--ink);font-weight:900
}
.section-lead{font-size:20px;line-height:1.7;max-width:820px}
.section-rule{border-top:1px solid var(--ink)}
.content-img{max-width:100%;height:auto;object-fit:contain;border:1px solid var(--strong);background:var(--white)}
.poster-frame{padding:10px;background:var(--white);border:1px solid var(--ink)}
.poster-frame img{width:100%;height:auto;object-fit:contain}

.hero{padding:60px 0 44px}
.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:end}
.hero-copy{grid-column:1/7}
.hero-visual{grid-column:7/13;position:relative}
.hero h1{
  font-size:clamp(68px,8.2vw,118px);line-height:.82;letter-spacing:-.065em;
  margin:16px 0 24px;font-weight:950;color:var(--ink)
}
.hero-subtitle{font-size:clamp(23px,2.5vw,36px);line-height:1.25;font-weight:800;max-width:650px}
.hero-copy p{max-width:680px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-meta{
  display:grid;grid-template-columns:repeat(3,1fr);margin-top:34px;border-top:1px solid var(--ink);
  border-bottom:1px solid var(--ink)
}
.hero-meta span{padding:13px 10px;border-right:1px solid var(--line);font-size:14px;font-weight:750}
.hero-meta span:last-child{border-right:0}
.hero-visual .visual-code{
  position:absolute;left:-18px;top:28px;background:var(--blue);color:#fff;padding:8px 10px;
  font-size:13px;font-weight:850;letter-spacing:.1em
}
.hero-visual .visual-note{
  display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--ink);
  margin-top:8px;padding-top:8px;font-size:12px;font-weight:800;letter-spacing:.12em
}

.info-band{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--paper2)}
.info-band-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.info-band article{padding:28px 22px 30px;border-right:1px solid var(--ink)}
.info-band article:last-child{border-right:0}
.info-band .num{font-size:13px;color:var(--blue);font-weight:850}
.info-band h2{font-size:22px;margin:8px 0}
.info-band p{font-size:14px;line-height:1.65;margin:0;color:var(--muted)}

.channel-index{padding:84px 0}
.index-grid{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--ink)}
.index-item{
  display:grid;grid-template-columns:80px 1fr auto;gap:16px;align-items:start;
  padding:22px 12px;border-bottom:1px solid var(--ink)
}
.index-item:nth-child(odd){border-right:1px solid var(--ink)}
.index-item .num{color:var(--blue);font-weight:850}
.index-item h3{margin:0;font-size:21px}
.index-item p{margin:4px 0 0;color:var(--muted);font-size:14px}
.index-item a{color:var(--blue);font-weight:750;white-space:nowrap}

.brand-statement{padding:100px 0;background:var(--white);border-block:1px solid var(--ink)}
.statement-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.statement-number{font-size:clamp(100px,16vw,220px);line-height:.75;color:var(--blue);font-weight:950;letter-spacing:-.08em}
.statement-body p{font-size:19px}

.feature-section{padding:110px 0}
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:start}
.feature-copy{padding-top:14px}
.feature-copy .feature-list{border-top:1px solid var(--ink);margin-top:26px}
.feature-list div{display:grid;grid-template-columns:48px 1fr;padding:13px 0;border-bottom:1px solid var(--line)}
.feature-list strong{color:var(--blue)}

.dual-section{display:grid;grid-template-columns:7fr 5fr;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.dual-panel{padding:70px max(28px,calc((100vw - var(--max))/2));padding-right:52px}
.dual-panel + .dual-panel{
  padding-left:52px;padding-right:max(28px,calc((100vw - var(--max))/2));border-left:1px solid var(--ink)
}
.dual-panel.dark{background:var(--dark);color:var(--paper)}
.dual-panel.dark h2,.dual-panel.dark h3{color:var(--paper)}
.dual-panel.light{background:var(--paper)}
.dual-panel img{margin:24px 0;border:1px solid currentColor}
.dual-panel h2{font-size:clamp(38px,4vw,60px);line-height:1;margin:8px 0 22px}
.service-points{padding:0;margin:18px 0 20px;list-style:none;border-top:1px solid currentColor}
.service-points li{padding:11px 0;border-bottom:1px solid currentColor}

.triple-section{padding:100px 0}
.triple-grid{display:grid;grid-template-columns:1.05fr .8fr 1.15fr;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.triple-grid article{padding:30px;border-right:1px solid var(--ink)}
.triple-grid article:last-child{border-right:0}
.triple-grid h2{font-size:28px;line-height:1.1}
.triple-grid img{margin:20px 0}
.date-chip{font-weight:900;font-size:38px;color:var(--orange);line-height:1}

.safety-section{padding:100px 0;background:var(--dark);color:var(--paper)}
.safety-section .section-title{color:var(--paper)}
.safety-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.safety-card{border:1px solid rgba(244,241,232,.55);padding:24px}
.safety-card h3{font-size:30px;margin:10px 0}
.safety-card .accent-label{margin-bottom:10px}

.reviews{padding:100px 0}
.review-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}
.review-card{background:var(--white);border:1px solid var(--ink);padding:22px;min-height:180px}
.review-card:nth-child(1){grid-column:1/6}
.review-card:nth-child(2){grid-column:6/13;background:#F1F8C9}
.review-card:nth-child(3){grid-column:1/5}
.review-card:nth-child(4){grid-column:5/9;background:#E5EAFF}
.review-card:nth-child(5){grid-column:9/13}
.review-card:nth-child(6){grid-column:3/11}
.review-card .quote-mark{font-size:60px;line-height:.6;color:var(--blue);font-weight:950}
.review-card p{margin:18px 0 0}

.faq-section{padding:100px 0;background:var(--paper2);border-top:1px solid var(--ink)}
.faq-list{border-top:1px solid var(--ink)}
.faq-list details{border-bottom:1px solid var(--ink);padding:0}
.faq-list summary{
  cursor:pointer;list-style:none;display:grid;grid-template-columns:62px 1fr auto;gap:12px;
  padding:20px 0;font-weight:850;font-size:19px
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:'+';font-size:24px}
.faq-list details[open] summary::after{content:'−'}
.faq-answer{padding:0 0 22px 74px;max-width:900px;color:var(--muted)}

.responsible-strip{padding:72px 0;background:var(--lime);border-block:1px solid var(--ink)}
.responsible-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px}
.responsible-grid h2{font-size:clamp(36px,5vw,64px);line-height:1;margin:0}
.about-home{padding:90px 0}
.about-home-grid{display:grid;grid-template-columns:8fr 4fr;gap:48px;align-items:start}
.about-home img{border:1px solid var(--ink)}

/* inner pages */
.inner-hero{padding:72px 0 56px;border-bottom:1px solid var(--ink)}
.inner-hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:end}
.inner-hero h1{
  font-size:clamp(58px,7vw,96px);letter-spacing:-.06em;line-height:.88;margin:18px 0 20px
}
.inner-hero p{font-size:19px;max-width:760px}
.inner-hero img{border:1px solid var(--ink);background:var(--white)}
.inner-code{font-size:12px;letter-spacing:.16em;font-weight:850;color:var(--blue)}
.inner-content{padding:88px 0}

.editorial-layout{display:grid;grid-template-columns:3fr 7fr 2fr;gap:30px}
.editorial-aside{font-size:13px;color:var(--muted);border-top:1px solid var(--ink);padding-top:12px}
.editorial-main section{padding:0 0 42px;margin-bottom:42px;border-bottom:1px solid var(--ink)}
.editorial-main h2,.stack-section h2,.timeline-section h2,.service-section h2{
  font-size:clamp(30px,4vw,48px);line-height:1.05;margin:8px 0 18px
}
.editorial-main h3{font-size:24px}
.pull-quote{background:var(--lime);border:1px solid var(--ink);padding:22px;font-size:22px;font-weight:850;line-height:1.45}
.side-links{display:grid;border-top:1px solid var(--ink)}
.side-links a{padding:11px 0;border-bottom:1px solid var(--line);color:var(--blue);font-weight:750}

.stack-layout{display:grid;grid-template-columns:8fr 4fr;gap:50px}
.stack-section{padding:0 0 44px;margin-bottom:44px;border-bottom:1px solid var(--ink)}
.stack-side{position:relative}
.stack-side .sticky-box{position:sticky;top:100px;border:1px solid var(--ink);padding:18px;background:var(--white)}
.stack-side img{margin-bottom:18px}

.numbered-list{border-top:1px solid var(--ink)}
.numbered-list article{display:grid;grid-template-columns:80px 1fr;gap:18px;padding:24px 0;border-bottom:1px solid var(--ink)}
.numbered-list .n{font-size:28px;font-weight:950;color:var(--blue)}
.numbered-list h2{margin:0 0 8px;font-size:32px}

.dark-feature{background:var(--dark);color:var(--paper);padding:60px;border:1px solid var(--ink);margin:0 0 54px}
.dark-feature h2{color:var(--paper);font-size:clamp(32px,4vw,54px);line-height:1}
.timeline{border-left:2px solid var(--ink);margin-left:12px;padding-left:34px}
.timeline-section{position:relative;padding:0 0 42px}
.timeline-section::before{
  content:'';position:absolute;left:-42px;top:10px;width:14px;height:14px;background:var(--lime);border:2px solid var(--ink)
}
.timeline-label{font-size:12px;color:var(--blue);font-weight:850;letter-spacing:.1em}

.service-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:0;border-top:1px solid var(--ink);
  border-left:1px solid var(--ink);margin:20px 0 50px
}
.service-section{padding:28px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--white)}
.service-section:nth-child(3n){background:#F1F8C9}
.service-section:nth-child(4n){background:#E5EAFF}

.mini-review{padding:28px;border-left:6px solid var(--blue);background:var(--paper2);margin:36px 0}
.mini-review p{font-size:20px;margin:0}
.inner-faq{margin-top:46px}
.inner-faq details{border-top:1px solid var(--ink);padding:15px 0}
.inner-faq details:last-child{border-bottom:1px solid var(--ink)}
.inner-faq summary{font-weight:850;cursor:pointer}
.inner-faq p{color:var(--muted);margin-bottom:4px}
.legal-note{background:var(--lime);border:1px solid var(--ink);padding:24px;margin-top:46px}
.legal-note h2{font-size:30px;margin:0 0 10px}

.page-app .inner-hero{background:#E5EAFF}
.page-safety .inner-hero,.page-privacy .inner-hero{background:var(--dark);color:var(--paper)}
.page-safety .inner-hero h1,.page-privacy .inner-hero h1{color:var(--paper)}
.page-activity .inner-hero{background:#F1F8C9}
.page-brand .inner-hero{background:var(--white)}
.page-chat .inner-hero{background:var(--paper2)}
.page-responsible .inner-hero{background:var(--lime)}

.site-footer{background:var(--ink);color:var(--paper);padding:80px 0 34px}
.footer-inner{width:min(var(--max),calc(100% - 48px));margin-inline:auto}
.footer-brand{
  display:grid;grid-template-columns:4fr 5fr 3fr;gap:32px;padding-bottom:40px;
  border-bottom:1px solid rgba(244,241,232,.3)
}
.footer-mark{font-size:clamp(42px,6vw,80px);font-weight:950;line-height:.9;letter-spacing:-.05em}
.footer-brand p{margin:0;color:#d3d0c5}
.footer-tag{align-self:start;color:var(--lime);font-size:12px;font-weight:850;letter-spacing:.12em}
.footer-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;padding:42px 0}
.footer-columns h2{font-size:14px;letter-spacing:.12em;color:var(--lime)}
.footer-columns a{display:block;text-decoration:none;color:var(--paper);padding:4px 0}
.footer-columns a:hover{color:var(--lime)}
.footer-compliance{border-top:1px solid rgba(244,241,232,.3);border-bottom:1px solid rgba(244,241,232,.3);padding:26px 0}
.footer-compliance strong{color:var(--lime)}
.footer-compliance p{color:#c9c6bb;margin:8px 0 0;max-width:1040px}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:24px;font-size:13px;color:#aaa79f}
.mobile-bottom-nav{display:none}

@media(max-width:1050px){
  .nav-core{gap:14px}.nav-core a{font-size:14px}
  .hero-grid,.inner-hero-grid{gap:28px}
  .dual-panel{padding-left:28px;padding-right:28px}
  .dual-panel + .dual-panel{padding-left:28px;padding-right:28px}
  .editorial-layout{grid-template-columns:2fr 7fr}
  .editorial-layout>.editorial-aside:last-child{display:none}
}
@media(max-width:820px){
  body{font-size:16px;padding-bottom:66px}
  .container,.footer-inner{width:min(100% - 36px,var(--max))}
  .header-inner{padding:0 14px;min-height:64px;gap:10px}
  .nav-core,.menu-trigger-desktop{display:none}
  .menu-trigger-mobile{display:grid}
  .site-logo{position:absolute;left:50%;transform:translateX(-50%)}
  .site-logo img{max-width:118px;max-height:38px}
  .header-cta{min-height:40px;padding:8px 11px;font-size:13px}
  .header-actions{margin-left:auto}
  .hero{padding:44px 0 32px}
  .hero-grid,.statement-grid,.feature-grid,.inner-hero-grid,.stack-layout,.about-home-grid,.responsible-grid{grid-template-columns:1fr}
  .hero-copy,.hero-visual{grid-column:1}
  .hero h1{font-size:clamp(58px,18vw,88px)}
  .hero-visual .visual-code{left:8px;top:8px}
  .info-band-grid{grid-template-columns:repeat(2,1fr)}
  .info-band article:nth-child(2){border-right:0}
  .info-band article:nth-child(-n+2){border-bottom:1px solid var(--ink)}
  .index-grid{grid-template-columns:1fr}
  .index-item:nth-child(odd){border-right:0}
  .index-item{grid-template-columns:56px 1fr}
  .index-item a{grid-column:2}
  .brand-statement,.feature-section,.triple-section,.reviews,.faq-section,.safety-section{padding:68px 0}
  .statement-number{font-size:120px}
  .dual-section,.triple-grid,.safety-grid{grid-template-columns:1fr}
  .dual-panel + .dual-panel{border-left:0;border-top:1px solid var(--ink)}
  .triple-grid article{border-right:0;border-bottom:1px solid var(--ink)}
  .triple-grid article:last-child{border-bottom:0}
  .review-grid{grid-template-columns:1fr}
  .review-card:nth-child(n){grid-column:1}
  .responsible-strip{padding:56px 0}
  .inner-hero{padding:48px 0}
  .inner-hero h1{font-size:clamp(52px,15vw,76px)}
  .inner-content{padding:62px 0}
  .editorial-layout{grid-template-columns:1fr}
  .editorial-aside{order:2}
  .stack-side .sticky-box{position:static}
  .numbered-list article{grid-template-columns:54px 1fr}
  .dark-feature{padding:30px}
  .service-grid{grid-template-columns:1fr}
  .footer-brand,.footer-columns{grid-template-columns:1fr}
  .footer-brand{gap:18px}
  .site-footer{padding:60px 0 24px}
  .footer-bottom{flex-direction:column}
  .mobile-bottom-nav{
    position:fixed;z-index:9998;left:0;right:0;bottom:0;height:60px;background:rgba(255,253,247,.98);
    border-top:1px solid var(--ink);display:grid;grid-template-columns:repeat(4,1fr);
    padding-bottom:env(safe-area-inset-bottom)
  }
  .mobile-bottom-nav a{
    display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:13px;font-weight:800
  }
  .mobile-bottom-nav a:hover{background:var(--lime)}
  .site-drawer{
    right:auto;left:0;transform:translateX(-104%);width:min(460px,94vw);padding:22px 24px 38px
  }
  .site-drawer.open{transform:translateX(0)}
}
@media(max-width:480px){
  .container,.footer-inner{width:calc(100% - 32px)}
  .hero-meta{grid-template-columns:1fr}
  .hero-meta span{border-right:0;border-bottom:1px solid var(--line)}
  .hero-meta span:last-child{border-bottom:0}
  .info-band-grid{grid-template-columns:1fr}
  .info-band article{border-right:0;border-bottom:1px solid var(--ink)}
  .info-band article:last-child{border-bottom:0}
  .index-item{padding-left:0;padding-right:0}
  .section-title{font-size:40px}
  .timeline{padding-left:28px}
  .timeline-section::before{left:-36px}
  .faq-answer{padding-left:0}
  .faq-list summary{grid-template-columns:48px 1fr auto}
  .hero-actions{display:grid}
  .hero-actions a{width:100%}
}