/* roulang page: index */
:root{
  --page:#F3F7FB;
  --deep:#E7F0F7;
  --surface:#FFFFFF;
  --text:#152636;
  --muted:#526C81;
  --line:#DCE8F2;
  --blue:#1263A3;
  --navy:#0C3E6B;
  --blue-soft:#DDEAF5;
  --green:#23C5A8;
  --green-deep:#0FA387;
  --green-soft:#DFF7F1;
  --navy-bg:#071A29;
  --neon:#55F0D6;
  --amber:#F5B342;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 2px 10px rgba(15,60,90,.06);
  --shadow-md:0 12px 24px rgba(15,60,90,.10);
  --shadow-lg:0 18px 36px rgba(15,60,90,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  background:var(--page);
  color:var(--text);
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.75;
}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none;transition:color .2s ease, opacity .2s ease}
a:hover{color:var(--green-deep)}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.grid-container{padding-left:24px;padding-right:24px}
.section{padding:90px 0}
.soft-section{background:var(--deep)}
::selection{background:var(--green-soft);color:var(--navy)}
:focus-visible{outline:3px solid rgba(35,197,168,.5);outline-offset:3px;border-radius:4px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;border:0;
  font-size:16px;font-weight:700;line-height:1;cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--navy);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(18,99,163,.24)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border:1px solid #A3BACB;color:var(--navy)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);background:rgba(18,99,163,.05);transform:translateY(-2px)}
.btn-green{background:var(--green);color:#042a21}
.btn-green:hover{background:var(--green-deep);color:#fff;box-shadow:0 10px 24px rgba(15,163,135,.28);transform:translateY(-2px)}
.btn-outline-light{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{border-color:var(--neon);color:var(--neon);transform:translateY(-2px)}

/* top nav */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--navy-bg);
  border-bottom:1px solid rgba(85,240,214,.18);
  box-shadow:0 4px 20px rgba(2,10,18,.24);
}
.header-inner{height:72px;display:flex;align-items:center;gap:18px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;text-decoration:none;font-size:1.28rem;font-weight:800;letter-spacing:.02em;flex-shrink:0;
}
.brand:hover{color:#fff;opacity:.92}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;
  background:linear-gradient(135deg,var(--green),var(--blue));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 14px rgba(85,240,214,.45);
}
.brand-mark::after{
  content:"";display:block;width:0;height:0;margin-left:2px;
  border-top:7px solid transparent;border-bottom:7px solid transparent;
  border-left:11px solid #fff;border-radius:1px;
}
.brand-name-baidu em, .brand .app-suffix{font-style:normal;color:var(--neon)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.main-nav .nav-link{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 15px;margin:0 2px;border-radius:8px;
  color:rgba(255,255,255,.8);font-size:15px;font-weight:600;white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.main-nav .nav-link:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav .nav-link.is-active{
  color:#fff;
}
.main-nav .nav-link.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:-2px;height:3px;border-radius:99px;
  background:var(--neon);box-shadow:0 0 10px rgba(85,240,214,.9),0 0 20px rgba(85,240,214,.35);
}
.main-nav .nav-divider{width:1px;height:22px;margin:0 8px;background:rgba(255,255,255,.14)}
.nav-cta{
  margin-left:8px;height:42px;padding:0 20px;background:var(--green);color:#042a21;
  border:none;font-size:15px;font-weight:800;border-radius:10px;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;
  transition:background .2s,box-shadow .2s,transform .2s;
}
.nav-cta:hover{background:var(--neon);color:#042a21;transform:translateY(-1px);box-shadow:0 8px 24px rgba(85,240,214,.3)}
.burger{
  display:none;margin-left:auto;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid rgba(255,255,255,.2);border-radius:10px;color:#fff;cursor:pointer;
}
.burger i{font-size:20px}
@media (max-width:1024px){
  .main-nav{position:absolute;top:72px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:6px;background:#071A29;padding:18px;box-shadow:0 30px 40px rgba(0,0,0,.25);border-top:1px solid rgba(85,240,214,.2)}
  .main-nav.is-open{display:flex}
  .main-nav .nav-link,.main-nav .nav-cta{width:100%;justify-content:flex-start;height:50px;padding:0 14px;margin:0;border-radius:10px}
  .main-nav .nav-link.is-active::after{display:none}
  .main-nav .nav-link.is-active{background:rgba(85,240,214,.1);color:var(--neon)}
  .main-nav .nav-divider{display:none}
  .nav-cta{margin-left:0;color:var(--neon);background:transparent;border:1px solid rgba(85,240,214,.5)}
  .burger{display:inline-flex}
}

/* hero */
.hero{
  position:relative;padding:110px 0 90px;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(231,240,247,.94) 0%,rgba(243,247,251,.96) 80%),url('/assets/images/backpic/back-1.jpg');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;right:-150px;top:-100px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(85,240,214,.18),transparent 65%);pointer-events:none;z-index:0;
}
.hero .container{position:relative;z-index:1}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;margin-bottom:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.04em;
  box-shadow:var(--shadow-sm);
}
.hero-badge i{color:var(--green-deep)}
.hero h1{
  margin:0 0 22px;font-size:clamp(32px,4.4vw,52px);line-height:1.2;font-weight:800;letter-spacing:-.01em;
  color:var(--navy);
}
.hero h1 .hl{color:var(--blue);position:relative}
.hero-sub{
  font-size:clamp(17px,1.5vw,20px);line-height:1.8;color:var(--muted);max-width:620px;margin:0 0 32px;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:22px}
.hero-note{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;color:var(--muted);font-size:13px;
}
.hero-note .dot{width:4px;height:4px;border-radius:50%;background:#B2C8D8}
.hero-visual{position:relative}
.hero-art{
  border-radius:22px;overflow:hidden;background:var(--surface);
  box-shadow:0 28px 70px rgba(15,60,90,.16);border:1px solid rgba(255,255,255,.8);
}
.hero-art img{width:100%;height:390px;object-fit:cover}
.float-chip{
  position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 16px;display:flex;align-items:center;gap:12px;
  box-shadow:var(--shadow-md);font-size:13px;line-height:1.4;color:var(--navy);font-weight:600;
}
.float-chip i{width:32px;height:32px;border-radius:9px;background:var(--green-soft);color:var(--green-deep);display:flex;align-items:center;justify-content:center;font-size:14px}
.float-chip span strong{display:block;color:var(--text)}
.float-tag{position:absolute;top:24px;right:18px;background:var(--navy);color:var(--neon);padding:7px 13px;border-radius:99px;font-size:12px;font-weight:600;box-shadow:var(--shadow-md)}
.float-a{top:32px;left:-16px}
.float-b{bottom:24px;right:-10px}
@media (max-width:1024px){
  .hero{padding:74px 0 60px}
  .float-a{left:6px}
  .float-b{right:6px}
}
@media (max-width:640px){
  .hero h1{font-size:32px}
  .hero-art img{height:240px}
  .float-tag{top:14px;right:10px}
  .float-a{position:static;margin-top:12px}
  .float-b{position:static;margin-top:10px}
}

/* section-head */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;margin-bottom:16px;
  background:var(--green-soft);color:var(--green-deep);border-radius:99px;font-size:12px;font-weight:700;letter-spacing:.08em;
}
.eyebrow-blue{background:var(--blue-soft);color:var(--blue)}
.section-head h2{
  margin:0 0 18px;font-size:clamp(26px,3vw,36px);line-height:1.25;font-weight:800;letter-spacing:-.02em;color:var(--navy);
}
.section-lead{
  margin:0 0 46px;font-size:16px;color:var(--muted);max-width:650px;line-height:1.8;
}
.row-title{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;flex-wrap:wrap;margin-bottom:40px}
.row-title .section-lead{margin:0;max-width:520px}

/* feature cards */
.feat-main{
  height:100%;background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;
  box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
  transition:transform .25s,box-shadow .25s;
}
.feat-main:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feat-main .f-media{height:230px;overflow:hidden}
.feat-main .f-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.feat-main:hover .f-media img{transform:scale(1.03)}
.feat-main .f-body{padding:26px 26px 28px;flex:1}
.feat-main .f-body h3{margin:0 0 10px;font-size:22px;color:var(--navy);line-height:1.4}
.feat-main .f-body p{margin:0 0 16px;color:var(--muted);font-size:15px}
.feat-tag-line{
  display:inline-flex;align-items:center;gap:8px;background:var(--green-soft);color:var(--green-deep);
  border-radius:99px;padding:6px 13px;font-size:13px;font-weight:600;
}
.f-small{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;height:100%;
  box-shadow:var(--shadow-sm);transition:box-shadow .25s,transform .25s;display:flex;flex-direction:column;gap:8px;
}
.f-small+.f-small{margin-top:18px}
.f-small:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.f-small .f-icon{
  width:40px;height:40px;border-radius:10px;background:var(--blue-soft);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:17px;flex:0 0 40px;
}
.f-small h3{margin:0;font-size:18px;line-height:1.4}
.f-small p{margin:0;font-size:14px;color:var(--muted);line-height:1.7}
.mini-feat-row{border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow-sm);overflow:hidden}
.mini-feat{
  position:relative;padding:24px 22px;min-height:150px;
}
.mini-feat+.mini-feat::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:1px;background:var(--line);
}
.mini-feat h3{margin:0 0 8px;font-size:17px;color:var(--navy);display:flex;align-items:center;gap:8px}
.mini-feat h3 i{color:var(--green-deep);font-size:14px}
.mini-feat p{margin:0;font-size:14px;color:var(--muted);line-height:1.7}
@media (max-width:840px){
  .mini-feat+.mini-feat::before{display:none}
  .mini-feat{border-bottom:1px solid var(--line)}
  .mini-feat:last-child{border-bottom:0}
}

/* scenes */
.scene-block{border-bottom:1px solid var(--line);padding:56px 0}
.scene-block:first-child{padding-top:0}
.scene-block:last-child{border-bottom:0}
.scene-media{
  position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line);
  transition:transform .25s;
}
.scene-media:hover{transform:translateY(-3px)}
.scene-media img{width:100%;height:320px;object-fit:cover}
@media (max-width:640px){.scene-media img{height:220px}}
.scene-media .scene-media-tag{
  position:absolute;left:18px;top:18px;background:var(--navy);color:var(--neon);
  padding:7px 13px;border-radius:99px;font-size:12px;font-weight:700;
  box-shadow:var(--shadow-sm);
}
.scene-text .eyebrow{margin-bottom:14px}
.scene-text h3{margin:0 0 14px;font-size:26px;line-height:1.35;color:var(--navy)}
.scene-text p{margin:0 0 18px;color:var(--muted);font-size:15.5px}
.scene-result{
  background:var(--green-soft);border-left:3px solid var(--green);border-radius:10px;padding:9px 14px;
  font-size:14px;color:#04624d;font-weight:600;
}

/* testimonials */
.testi-ring{
  background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;height:100%;
  box-shadow:var(--shadow-sm);transition:box-shadow .25s,transform .25s;
}
.testi-ring:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.testi-big{background:linear-gradient(145deg,#fff,#EAF6F4);}
.testi-big blockquote{font-size:25px;line-height:1.6;font-weight:700;color:var(--navy);margin:4px 0 18px}
.testi-big .stars{color:var(--amber)}
.testi-big .quote-mark{font-size:44px;line-height:.8;color:var(--green);opacity:.4;display:block}
.testi-user{display:flex;align-items:center;gap:12px;margin-top:20px}
.testi-user .avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 44px;
  background:linear-gradient(145deg,var(--blue-soft),var(--green-soft));
  color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
}
.testi-user .name{font-weight:700;color:var(--text)}
.testi-user .meta{font-size:12px;color:var(--muted)}
.stars i{color:var(--amber);font-size:14px}
.testi-sm{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-sm);transition:box-shadow .25s,transform .25s}
.testi-sm:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.testi-sm .avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 44px;color:#fff;
  background:linear-gradient(145deg,var(--blue),var(--green-deep));
  display:flex;align-items:center;justify-content:center;font-weight:700;
}
.testi-sm p{margin:12px 0 14px;font-size:14.5px;color:var(--muted);line-height:1.8}
.review-strip{margin-top:34px;background:var(--navy);border-radius:18px;padding:24px;color:#fff;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between}
.review-strip .strip-note{font-size:14px;color:rgba(255,255,255,.68)}
.review-strip .strip-labels{display:flex;flex-wrap:wrap;gap:12px}
.review-strip .pill{background:rgba(85,240,214,.12);border:1px solid rgba(85,240,214,.3);color:var(--neon);border-radius:99px;padding:8px 14px;font-size:13px;font-weight:600}

/* pricing */
.pricing-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm);
  padding:30px 26px;height:100%;display:flex;flex-direction:column;position:relative;
  transition:box-shadow .25s,transform .25s,border .25s;
}
.pricing-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-5px)}
.pricing-card.popular{
  border:1px solid var(--green);box-shadow:0 20px 40px rgba(15,163,135,.14);z-index:2;
}
.popular-badge{
  position:absolute;top:-15px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,var(--green),var(--green-deep));color:#fff;
  padding:6px 16px;border-radius:99px;font-size:13px;font-weight:700;white-space:nowrap;
  box-shadow:0 8px 18px rgba(15,163,135,.25);
}
.plan-name{font-size:15px;font-weight:700;color:var(--muted);margin-bottom:12px}
.plan-price{display:flex;align-items:baseline;margin-bottom:8px;gap:4px;font-variant-numeric:tabular-nums}
.plan-price .cur{font-size:18px;font-weight:700;color:var(--navy)}
.plan-price .num{font-size:42px;font-weight:800;color:var(--navy);letter-spacing:-.03em}
.plan-price .period{font-size:14px;color:var(--muted)}
.plan-desc{margin:0 0 16px;font-size:14px;color:var(--muted)}
.plan-features{list-style:none;margin:0 0 28px;padding:0;flex:1}
.plan-features li{position:relative;padding:7px 0 7px 28px;font-size:14px;color:var(--text)}
.plan-features li::before{
  content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:0;top:7px;color:var(--green-deep);font-size:12px;
}
.plan-features li strong{color:var(--navy)}
.btn-plan{width:100%}

/* faq */
.accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;margin:0 0 14px;
  box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow .2s;
}
.accordion-item:hover{box-shadow:var(--shadow-md)}
.accordion-title{
  background:#fff!important;border:0!important;color:var(--navy)!important;padding:20px 24px!important;
  font-size:16px!important;font-weight:700!important;line-height:1.5;
}
.accordion-title:hover{background:#F7FBFE!important;color:var(--blue)!important}
.accordion-title::before{
  color:var(--green)!important;right:22px!important;left:auto!important;
  font-size:18px!important;
}
.accordion-content{
  border-top:1px solid var(--line)!important;padding:0 24px 20px!important;background:#fff!important;
}
.accordion-content p{margin:14px 0 0;font-size:15px;color:var(--muted);line-height:1.85}

/* cta */
.cta-band{
  background:linear-gradient(135deg,#071A29,#0C3E6B);border-radius:22px;color:#fff;
  padding:42px 40px;display:flex;flex-wrap:wrap;align-items:center;gap:28px;justify-content:space-between;
  box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-80px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(85,240,214,.35),transparent 65%);
}
.cta-band h2{margin:0 0 6px;font-size:28px;color:#fff}
.cta-band p{margin:0;color:rgba(255,255,255,.7);max-width:520px;font-size:15px}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:2}

/* footer */
.site-footer{
  background:var(--navy-bg);color:rgba(255,255,255,.72);padding:68px 0 34px;margin-top:60px;
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand .brand{font-size:1.3rem}
.footer-brand p{font-size:14px;line-height:1.8;margin:0;color:rgba(255,255,255,.58);max-width:330px}
.footer-links h4{margin:0 0 14px;color:#fff;font-size:15px;font-weight:700}
.footer-links ul{list-style:none;margin:0;padding:0}
.footer-links li+li{margin-top:8px}
.footer-links a{color:rgba(255,255,255,.6);font-size:14px}
.footer-links a:hover{color:var(--neon)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding-top:24px;
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.65)}
.footer-bottom a:hover{color:var(--neon)}

@media (max-width:640px){
  .section{padding:62px 0}
  .cta-band{padding:32px 22px;border-radius:18px}
  .grid-margin-x>.cell{clear:both}
  .catalog-testi-cell,.catalog-right-cell{margin-bottom:22px}
  .pricing-card{margin-bottom:24px}
}

/* roulang page: category1 */
:root{
  --page:#F3F7FB;
  --deep:#E7F0F7;
  --surface:#FFFFFF;
  --text:#152636;
  --muted:#526C81;
  --line:#DCE8F2;
  --blue:#1263A3;
  --navy:#0C3E6B;
  --blue-soft:#DDEAF5;
  --green:#23C5A8;
  --green-deep:#0FA387;
  --green-soft:#DFF7F1;
  --navy-bg:#071A29;
  --neon:#55F0D6;
  --amber:#F5B342;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 2px 10px rgba(15,60,90,.06);
  --shadow-md:0 12px 24px rgba(15,60,90,.10);
  --shadow-lg:0 18px 36px rgba(15,60,90,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  background:var(--page);
  color:var(--text);
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.75;
}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--green-deep)}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;line-height:1.3}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.grid-container{padding-left:24px;padding-right:24px}
.block{padding:88px 0}
.soft-block{background:var(--deep)}
.hidden-anchor{display:block;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;border:0;
  font-size:16px;font-weight:700;line-height:1;cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--navy);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(18,99,163,.24)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border:1px solid #A3BACB;color:var(--navy)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);background:rgba(18,99,163,.05);transform:translateY(-2px)}
.btn-green{background:var(--green);color:#042a21}
.btn-green:hover{background:var(--green-deep);color:#fff;box-shadow:0 10px 24px rgba(15,163,135,.28);transform:translateY(-2px)}
.btn-green:active{transform:translateY(0);box-shadow:none}

/* site header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--navy-bg);
  border-bottom:1px solid rgba(85,240,214,.18);
  box-shadow:0 4px 20px rgba(2,10,18,.24);
}
.header-inner{height:72px;display:flex;align-items:center;gap:18px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;text-decoration:none;font-size:1.28rem;font-weight:800;letter-spacing:.02em;flex-shrink:0;
}
.brand:hover{color:#fff;opacity:.92}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;
  background:linear-gradient(135deg,var(--green),var(--blue));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 14px rgba(85,240,214,.45);
}
.brand-mark::after{
  content:"";display:block;width:0;height:0;margin-left:2px;
  border-top:7px solid transparent;border-bottom:7px solid transparent;
  border-left:11px solid #fff;border-radius:1px;
}
.app-suffix{font-style:normal;color:var(--neon)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.main-nav .nav-link{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 15px;margin:0 2px;border-radius:8px;
  color:rgba(255,255,255,.8);font-size:15px;font-weight:600;white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.main-nav .nav-link:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav .nav-link.is-active{color:#fff}
.main-nav .nav-link.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:-2px;height:3px;border-radius:99px;
  background:var(--neon);box-shadow:0 0 10px rgba(85,240,214,.9),0 0 20px rgba(85,240,214,.35);
}
.main-nav .nav-divider{width:1px;height:22px;margin:0 8px;background:rgba(255,255,255,.14)}
.nav-cta{
  margin-left:8px;height:42px;padding:0 20px;background:var(--green);color:#042a21;
  border:none;font-size:15px;font-weight:800;border-radius:10px;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;
  transition:background .2s,box-shadow .2s,transform .2s;
}
.nav-cta:hover{background:var(--neon);color:#042a21;transform:translateY(-1px);box-shadow:0 8px 24px rgba(85,240,214,.3)}
.burger{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid rgba(255,255,255,.2);border-radius:10px;
  color:#fff;font-size:20px;cursor:pointer;margin-left:auto;z-index:70;
}
.burger:hover{background:rgba(255,255,255,.08)}

/* footer */
.site-footer{
  background:var(--navy-bg);
  color:#A8BECD;
  padding:66px 0 30px;
  margin-top:20px;
}
.site-footer .brand{font-size:1.22rem;margin-bottom:12px;display:inline-flex}
.footer-brand p{color:#8AA4B8;font-size:15px;max-width:340px;margin:14px 0 0}
.footer-links h4{
  color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;
}
.footer-links ul{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#A8BECD;font-size:15px}
.footer-links a:hover{color:var(--neon)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  margin-top:48px;padding-top:22px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#6F8AA0;
}
.footer-bottom a{color:#8AA4B8}
.footer-bottom a:hover{color:var(--neon)}

/* category hero */
.category-hero{
  position:relative;
  padding:86px 0 72px;
  background-image:linear-gradient(160deg,rgba(255,255,255,.92) 0%,rgba(231,240,247,.86) 55%,rgba(223,247,241,.86) 100%),url('/assets/images/backpic/back-3.jpg');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:14px;color:var(--muted);margin-bottom:32px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb .sep{color:#A8BECD;font-size:12px}
.breadcrumb .current{color:var(--navy);font-weight:600}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;margin-bottom:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  color:var(--blue);font-size:13px;font-weight:700;
  box-shadow:var(--shadow-sm);
}
.hero-badge i{color:var(--green-deep)}
.category-hero h1{
  margin:0 0 24px;
  font-size:clamp(32px,4.4vw,50px);
  line-height:1.2;font-weight:800;letter-spacing:-.01em;
  color:var(--navy);
}
.category-hero h1 .accent{color:var(--green-deep)}
.category-hero p.hero-text{
  color:var(--muted);
  font-size:17px;
  max-width:590px;
  margin:0 0 30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:18px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px}
.hero-meta i{color:var(--green-deep);margin-right:3px}

/* invite card */
.invite-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  padding:30px;
  position:relative;
}
.invite-card::before{
  content:"";position:absolute;right:-14px;top:-14px;width:70px;height:70px;border-radius:50%;
  background:radial-gradient(circle,rgba(35,197,168,.25),transparent 70%);
}
.invite-card .pill{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--green-soft);color:var(--green-deep);
  border-radius:999px;height:28px;padding:0 13px;
  font-size:12px;font-weight:800;
}
.invite-card h3{font-size:22px;color:var(--navy);margin:18px 0 10px}
.invite-card p{color:var(--muted);font-size:14px;line-height:1.8;margin:0 0 22px}
.invite-progress-label{
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  font-size:14px;color:var(--text);font-weight:600;margin-bottom:10px;
}
.invite-progress-label span:last-child{color:var(--muted);font-weight:400;font-size:13px}
.invite-progress{
  position:relative;height:10px;border-radius:99px;background:var(--deep);overflow:hidden;margin-bottom:10px;
}
.invite-progress i{
  display:block;height:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--green),var(--neon));
  box-shadow:0 0 12px rgba(85,240,214,.6);
}
.invite-note{color:var(--muted);font-size:13px;margin-bottom:24px}
.invite-copy-btn{width:100%}
.copy-status{
  display:block;text-align:center;font-size:13px;color:var(--green-deep);
  min-height:18px;margin-top:10px;
}

/* topic index */
.topic-index{padding:40px 0 0;background:var(--page)}
.topic-pills{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:18px 0 22px;border-bottom:1px solid var(--line)}
.topic-pills .pill{
  display:inline-flex;align-items:center;gap:6px;
  height:42px;padding:0 20px;margin:0;background:#fff;
  border:1px solid var(--blue-soft);border-radius:999px;
  color:var(--navy);font-size:15px;font-weight:600;cursor:pointer;
  transition:all .2s ease;
}
.topic-pills .pill:hover{border-color:var(--green);color:var(--green-deep);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.topic-pills .pill.is-active{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(18,99,163,.2)}
.pill-label{font-size:13px;color:var(--muted);font-weight:600;margin-right:4px}
.pill-label i{color:var(--blue);margin-right:6px}

/* block header */
.block-head{margin-bottom:38px}
.block-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:800;letter-spacing:.08em;color:var(--blue);
  text-transform:uppercase;margin-bottom:12px;
}
.block-eyebrow::before{content:"";width:22px;height:3px;border-radius:99px;background:var(--green)}
.block-head h2{font-size:clamp(26px,3vw,36px);color:var(--navy);font-weight:750;margin-bottom:10px}
.block-head .sub{color:var(--muted);font-size:16px;max-width:720px}

/* editor pick */
.editor-pick{background:var(--deep)}
.feature-main-card{
  background:var(--surface);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-md);
  border:1px solid var(--line);
  height:100%;
  transition:transform .25s ease,box-shadow .25s ease;
}
.feature-main-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.feature-main-card .grid-x{align-items:stretch}
.feature-main__media{min-height:300px;overflow:hidden}
.feature-main__media img{width:100%;height:100%;object-fit:cover}
.feature-main__content{padding:26px 28px 30px;display:flex;flex-direction:column;justify-content:center}
.feature-main__content .pill{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--blue-soft);color:var(--blue);
  height:28px;padding:0 13px;border-radius:999px;
  font-size:12px;font-weight:700;align-self:flex-start;margin-bottom:16px;
}
.feature-main__content h3{font-size:24px;color:var(--navy);line-height:1.4;margin-bottom:16px}
.feature-main__content p{color:var(--muted);font-size:15px;line-height:1.8;margin-bottom:24px}
.link-arrow{display:inline-flex;align-items:center;gap:7px;font-weight:700;color:var(--blue)}
.link-arrow i{transition:transform .2s}
.link-arrow:hover i{transform:translateX(4px)}
.stack-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:22px 22px 20px;margin-bottom:18px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.stack-card:last-child{margin-bottom:0}
.stack-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.stack-card .mini-icon{
  width:34px;height:34px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:var(--green-soft);color:var(--green-deep);font-size:15px;margin-bottom:14px;
}
.stack-card h3{font-size:18px;line-height:1.45;color:var(--navy);margin-bottom:8px}
.stack-card p{color:var(--muted);font-size:14px;line-height:1.75;margin:0}
.grid-x.grid-margin-x .cell.large-4.pull-card .stack-card:last-child{margin-bottom:0}
.editor-pick-second{margin-top:24px}
.vertical-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;height:100%;
  display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.vertical-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.vertical-card .card-img{min-height:150px;overflow:hidden}
.vertical-card .card-img img{width:100%;height:100%;object-fit:cover;min-height:150px;transition:transform .4s ease}
.vertical-card:hover .card-img img{transform:scale(1.04)}
.vertical-card .card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.vertical-card .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.tag-row span{
  height:24px;line-height:24px;padding:0 10px;background:var(--green-soft);
  color:var(--green-deep);border-radius:999px;font-size:12px;font-weight:700;
}
.vertical-card   h3{font-size:19px;line-height:1.45;color:var(--navy);margin-bottom:10px}
.vertical-card p{color:var(--muted);font-size:14px;line-height:1.75;margin-bottom:16px;flex:1}
.card-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--blue);
  margin-top:auto;
}

/* guide groups */
.group-intro-grid{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:36px}
.group-intro-grid .sub{margin:0}
.guide-row{
  margin:0;
  padding:34px 0 34px;
  border-bottom:1px solid var(--line);
  align-items:center;
}
.guide-row:first-of-type{border-top:1px solid var(--line)}
.guide-row:hover{background:rgba(18,99,163,.02)}
.guide-num{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:800;color:var(--green-deep);
  letter-spacing:.05em;margin-bottom:10px;
}
.guide-num em{
  font-style:normal;font-weight:800;font-size:13px;color:var(--blue);
  font-variant-numeric:tabular-nums;
}
.guide-row h3{font-size:20px;color:var(--navy);line-height:1.45;margin-bottom:8px}
.guide-desc{color:var(--muted);font-size:14.5px;line-height:1.8;margin:0 0 10px}
.guide-tag{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--blue);font-weight:600;
}
.guide-tag i{color:var(--green-deep)}
.guide-img-wrap{
  border-radius:18px;
  overflow:hidden;
  box-shadow:0 10px 32px rgba(15,60,90,.12);
  transform:rotate(1.2deg);
  border:1px solid var(--line);
  transition:transform .25s ease,box-shadow .25s ease;
}
.guide-img-wrap:hover{transform:rotate(0deg) scale(1.02);box-shadow:0 20px 44px rgba(15,60,90,.16)}
.guide-img-wrap img{width:100%;height:100%;min-height:170px;object-fit:cover}
.guide-start{
  font-size:clamp(24px,2.6vw,34px);
  color:var(--navy);
  font-weight:750;
  margin:60px 0 0;
  text-align:center;
}
.guide-start .text-green{color:var(--green-deep)}

/* faq */
.faq-section{background:var(--page)}
.faq-panel{
  max-width:900px;margin:0 auto;
}
.faq-panel .accordion{
  list-style:none;margin:0;padding:0;
  background:transparent;
}
.faq-panel .accordion-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  margin-bottom:16px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-panel .accordion-item:hover{border-color:var(--blue-soft);box-shadow:var(--shadow-md)}
.faq-panel .accordion-item.is-active{border-color:rgba(35,197,168,.45)}
.faq-panel .accordion-title{
  position:relative;
  background:transparent;
  border:0;
  color:var(--navy);
  font-size:17px;
  font-weight:700;
  padding:24px 58px 24px 24px;
  line-height:1.5;
  display:flex;
  align-items:center;
  min-height:72px;
}
.faq-panel .accordion-title::before{
  content:"\f059";
  font-family:"Font Awesome 6 Free";
  font-weight:400;
  color:var(--blue);
  font-size:16px;
  margin-right:14px;
  opacity:.8;
}
.faq-panel .accordion-title::after{
  content:"\f078";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;
  right:22px;top:50%;
  transform:translateY(-50%);
  color:var(--green-deep);
  font-size:14px;
  width:28px;height:28px;
  display:flex;align-items:center;justify-content:center;
  background:var(--green-soft);border-radius:50%;
  transition:transform .25s ease;
}
.faq-panel .accordion-item.is-active > .accordion-title::after{transform:translateY(-50%) rotate(180deg)}
.faq-panel .accordion-content{
  background:transparent;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
  padding:6px 26px 24px 54px;
}
.faq-panel .accordion-content p{margin-bottom:0}
.faq-panel .accordion-title:focus,
.faq-panel .accordion-title:focus-visible{
  outline:3px solid rgba(35,197,168,.5);
  outline-offset:-3px;
}

/* category CTA */
.category-cta{
  background:linear-gradient(180deg,rgba(18,99,163,.04),rgba(35,197,168,.08));
  border-top:1px solid var(--line);
}
.cta-box{
  background:var(--surface);
  border-radius:26px;
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
  padding:56px 44px;
  display:flex;align-items:center;gap:30px;
  justify-content:space-between;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;left:-80px;top:-80px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(35,197,168,.16),transparent 65%);
}
.cta-box h2{font-size:clamp(24px,2.8vw,34px);color:var(--navy);font-weight:750;line-height:1.35;margin-bottom:10px}
.cta-box p{color:var(--muted);font-size:16px;margin:0}
.cta-action{display:flex;gap:14px;flex-wrap:wrap;align-items:center}

/* responsive */
@media (min-width:1025px){
  .main-nav{display:flex !important;flex-direction:row;align-items:center}
  .main-nav .nav-link,.main-nav .nav-cta{width:auto}
  .nav-cta{margin-left:8px;justify-content:center}
  .nav-divider{display:block}
}
@media (max-width:1024px){
  .main-nav{
    position:absolute;top:72px;left:0;right:0;display:none;
    flex-direction:column;align-items:stretch;gap:8px;
    background:var(--navy-bg);padding:18px;
    box-shadow:0 30px 40px rgba(0,0,0,.28);
    border-top:1px solid rgba(85,240,214,.2);
    margin:0;
  }
  .main-nav.is-open{display:flex}
  .main-nav .nav-link{
    width:100%;justify-content:flex-start;height:50px;padding:0 14px;margin:0;border-radius:10px;
    font-size:16px;
  }
  .main-nav .nav-link.is-active{background:rgba(85,240,214,.1);color:var(--neon)}
  .main-nav .nav-link.is-active::after{display:none}
  .main-nav .nav-divider{display:none}
  .nav-cta{
    width:100%;justify-content:center;margin-left:0;color:var(--neon);
    background:transparent;border:1px solid rgba(85,240,214,.5);height:50px;
  }
  .burger{display:inline-flex}
  .category-hero{padding:64px 0 54px}
  .block{padding:68px 0}
}
@media (max-width:768px){
  .category-hero h1{font-size:clamp(28px,6.4vw,38px)}
  .hero-text{font-size:16px}
  .invite-card{margin-top:34px}
  .feature-main__media{min-height:200px}
  .feature-main__content h3{font-size:21px}
  .guide-row{padding:26px 0}
  .guide-img-wrap{margin-top:10px}
  .vertical-card .card-img img,.vertical-card .card-img{min-height:120px}
  .cta-box{padding:40px 26px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .container{padding-left:18px;padding-right:18px}
  .block{padding:54px 0}
  .header-inner{height:64px}
  .main-nav{top:64px}
  .category-hero{padding:44px 0 42px}
  .breadcrumb{margin-bottom:20px}
  .topic-pills .pill{padding:0 14px;font-size:14px;height:38px}
  .guide-start .guide-start{margin-top:40px}
  .faq-panel .accordion-title{font-size:16px;padding:20px 54px 20px 18px}
  .faq-panel .accordion-content{padding:6px 20px 20px 18px}
  .hero-actions .btn{flex:1}
  .category-cta .cta-box p{font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation:none !important;
    transition:none !important;
    scroll-behavior:auto !important;
  }
}