/* roulang page: index */
:root{
  --blue:#2F6BFF;
  --blue-light:#4D8DFF;
  --blue-soft:#EEF4FF;
  --orange:#FF7A3D;
  --orange-soft:#FFF2EA;
  --text:#16273A;
  --mid:#4B5E70;
  --weak:#7D8FA0;
  --bg:#F3F7FD;
  --panel:#F8FAFE;
  --surface:#FFFFFF;
  --line:rgba(47,107,255,.10);
  --deep-blue:#1E3A5F;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:20px;
  --shadow-sm:0 10px 24px rgba(23,56,90,.06);
  --shadow-card:0 12px 30px rgba(23,56,90,.08);
  --shadow-lg:0 20px 44px rgba(23,56,90,.14);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:hover{color:var(--blue)}
ul,ol{list-style:none}
img{display:block;max-width:100%}
button,input,select{font-family:inherit}
.container{width:100%;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px}

h1,h2,h3,h4{line-height:1.25;font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,2.6vw,2.2rem)}
h3{font-size:1.15rem;font-weight:700}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;border-radius:999px;cursor:pointer;font-weight:600;
  padding:11px 22px;font-size:15px;line-height:1.3;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  min-height:44px;
}
.btn:focus-visible,a:focus-visible,summary:focus-visible,button:focus-visible{
  outline:3px solid rgba(47,107,255,.35);outline-offset:3px;
}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 12px 22px rgba(255,122,61,.25)}
.btn-primary:hover{background:#FF9A58;color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px rgba(255,122,61,.30)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:var(--surface);color:var(--blue);border:1px solid rgba(47,107,255,.35);box-shadow:var(--shadow-sm)}
.btn-outline:hover{background:var(--blue-soft);color:var(--blue);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.22);color:#fff;transform:translateY(-2px)}
.btn-block{width:100%}

/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(10px);
  transition:box-shadow .3s ease,background .3s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.98);box-shadow:0 8px 30px rgba(23,56,90,.08)}
.header-main{display:flex;align-items:center;gap:12px;height:76px}
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px;color:var(--text);font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo svg{flex:0 0 auto}
.logo:hover{color:var(--text)}
.logo-text{white-space:nowrap}

.desktop-nav{display:flex;gap:4px;margin-left:18px}
.nav-link{position:relative;display:inline-flex;align-items:center;padding:9px 14px;border-radius:999px;font-weight:600;font-size:15px;color:var(--mid);transition:color .2s,background .2s;white-space:nowrap}
.nav-link:hover{color:var(--blue);background:var(--blue-soft)}
.nav-link[aria-current]::after{content:"";position:absolute;left:20px;right:20px;bottom:3px;height:3px;border-radius:99px;background:var(--blue)}

.header-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.searchform{display:flex;align-items:center;background:#EDF2F8;border-radius:999px;padding:0 6px 0 14px;border:1px solid transparent;overflow:hidden;transition:width .2s,background .2s,border-color .2s;width:190px}
.searchform:focus-within{background:#fff;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,107,255,.10)}
.searchform input{border:0;outline:0;background:transparent;font-size:14px;padding:9px 0;color:var(--text);width:100%}
.searchform button{border:0;background:transparent;color:var(--weak);width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;cursor:pointer;border-radius:50%;transition:color .2s,background .2s}
.searchform button:hover{color:var(--blue);background:#E0E9F5}
.btn-login{background:transparent;border:0;color:var(--mid);font-weight:600;min-height:40px;padding:0 10px;border-radius:999px;cursor:pointer;transition:color .2s,background .2s}
.btn-login:hover{color:var(--blue);background:var(--blue-soft)}
.header-cta{min-height:42px;padding:9px 20px;border-radius:999px}
.header-cta svg{margin-right:4px}

.nav-toggle{display:none;align-items:center;align-self:center;cursor:pointer;gap:8px;border:1px solid var(--line);background:#fff;padding:9px 14px;border-radius:999px}
.nav-toggle .bar{display:block;width:18px;height:2px;background:var(--text);margin:3px 0;transition:.3s}
.nav-check{position:absolute;opacity:0;pointer-events:none}

.mobile-menu{display:none}
#nav-check:focus-visible ~ .header-main .nav-toggle{outline:3px solid rgba(47,107,255,.35)}

/* Hero */
.hero{
  position:relative;padding-top:160px;padding-bottom:96px;
  background:
   linear-gradient(105deg,rgba(248,250,254,.95) 0%,rgba(243,247,253,.90) 55%,rgba(233,242,251,.78) 100%),
   url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  overflow:hidden;
}
.hero-inner{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.hero-copy{max-width:640px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.72);border:1px solid rgba(47,107,255,.16);color:var(--blue);font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;margin-bottom:22px}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--orange)}
.hero h1{font-size:clamp(2.5rem,4.4vw,3.75rem);margin-bottom:18px;color:var(--text);letter-spacing:-.03em}
.hero-sub{font-size:clamp(1rem,1.25vw,1.2rem);color:var(--mid);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.hero-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;border-top:1px solid rgba(47,107,255,.12);padding-top:24px}
.hero-fact b{display:block;font-size:1.75rem;font-weight:800;color:var(--blue);line-height:1.2;margin-bottom:2px}
.hero-fact span{font-size:13px;color:var(--weak)}

.hero-panel{
  background:var(--deep-blue);border-radius:24px;color:#fff;padding:28px;
  box-shadow:0 34px 70px rgba(22,39,58,.22);position:relative;overflow:hidden;
}
.hero-panel::before{content:"";position:absolute;top:-80px;right:-70px;width:220px;height:220px;border-radius:50%;background:rgba(77,141,255,.2);pointer-events:none}
.hero-panel::after{content:"";position:absolute;bottom:-100px;left:-60px;width:180px;height:180px;border-radius:50%;background:rgba(255,122,61,.14);pointer-events:none}
.rank-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}
.rank-head h2{font-size:1.1rem;font-weight:700;letter-spacing:0}
.rank-head small{color:rgba(255,255,255,.55);font-size:12px;font-weight:400;text-align:right;line-height:1.4}
.rank-list{position:relative;z-index:1;display:flex;flex-direction:column;gap:8px}
.rank-item{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08)}
.rank-num{width:22px;font-size:15px;font-weight:800;color:#FFC7A3;flex:0 0 auto}
.rank-item div{flex:1;min-width:0}
.rank-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-meta{font-size:12px;color:rgba(255,255,255,.56)}
.rank-item i{font-style:normal;font-size:11px;padding:3px 8px;border-radius:99px;background:rgba(255,255,255,.12);color:#C7DCFF}
.rank-link{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;margin-top:18px;padding:10px 4px 0;border-top:1px solid rgba(255,255,255,.12);color:#fff;font-size:14px;font-weight:600;transition:.2s}
.rank-link:hover{color:#FFC7A3}

/* Section base */
.section{padding:96px 0}
.section-gap{padding:80px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head p{margin-top:12px;font-size:16px;color:var(--mid)}
.section-light{background:var(--surface)}
.section-soft{background:var(--blue-soft)}

/* Features */
.features{background:var(--surface);border-bottom:1px solid var(--line)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:32px 26px;box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease;
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.fc-blue{border-top:4px solid var(--blue);background:linear-gradient(160deg,#fff 0%,#F6F9FF 100%)}
.fc-light{border-top:4px solid var(--blue-light);background:#fff}
.fc-orange{border-top:4px solid var(--orange);background:linear-gradient(160deg,#fff 0%,#FFF6F2 100%)}
.feature-num{display:grid;place-items:center;position:absolute;top:22px;right:22px;width:32px;height:32px;border-radius:50%;font-size:12px;font-weight:800;color:#fff;background:var(--blue)}
.fc-orange .feature-num{background:var(--orange)}
.feature-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;margin-bottom:20px;color:#fff;background:var(--blue)}
.fc-orange .feature-icon{background:var(--orange)}
.fc-light .feature-icon{background:var(--blue-light)}
.feature-card h3{font-size:1.2rem;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--mid)}
.feature-more{display:inline-block;margin-top:18px;font-size:14px;font-weight:600;color:var(--blue)}
.fc-orange .feature-more{color:var(--orange)}
.feature-more:hover{text-decoration:underline}

/* Scenes */
.scene-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.scene-primary{grid-column:span 7}
.scene-stack{grid-column:span 5;display:grid;grid-template-rows:1fr 1fr;gap:24px}
.scene-card{
  background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.scene-media{position:relative;overflow:hidden;background:#E7EDF5}
.scene-media img{width:100%;height:100%;object-fit:cover}
.scene-primary .scene-media{min-height:300px}
.scene-primary .scene-body{padding:24px 28px 30px}
.scene-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--blue);background:var(--blue-soft);border-radius:999px;padding:5px 12px;margin-bottom:10px}
.scene-card h3{font-size:1.3rem;margin-bottom:8px}
.scene-card p{font-size:15px;color:var(--mid)}
.scene-stack .scene-card{display:grid;grid-template-columns:110px 1fr;min-height:180px}
.scene-stack .scene-media{min-height:180px}
.scene-stack .scene-body{padding:20px 22px;display:flex;flex-direction:column;justify-content:center}
.scene-stack .scene-body p{font-size:14px;margin-top:4px}
.scene-stack .scene-body .scene-tag{margin-bottom:8px}
.scene-link{display:inline-flex;align-items:center;gap:4px;color:var(--blue);font-size:14px;font-weight:600}
.scene-link:hover{text-decoration:underline}
.scene-link svg{transition:transform .2s}
.scene-link:hover svg{transform:translateX(4px)}

/* Proof section */
.proof{background:var(--surface)}
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.proof-left{max-width:520px}
.proof-left p{margin:16px 0 22px;color:var(--mid)}
.proof-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.proof-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);padding:18px}
.proof-item b{display:block;font-size:20px;color:var(--blue);margin-bottom:2px}
.proof-item span{font-size:13px;color:var(--weak)}
.proof-quotes{display:flex;flex-direction:column;gap:18px}
.quote-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);padding:26px 28px;position:relative;
}
.quote-card:nth-child(2){background:var(--blue-soft)}
.quote-icon{font-size:40px;line-height:1;font-weight:800;color:var(--orange);font-family:Georgia,serif;margin-bottom:4px}
.quote-card p{color:var(--text);font-size:15px;line-height:1.75}
.quote-author{display:block;margin-top:14px;color:var(--weak);font-size:13px;font-weight:600}

/* Feed */
.feed{background:var(--bg)}
.feed-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.feed-list{border-top:1px solid var(--line)}
.feed-item{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--line)}
.feed-date{flex:0 0 52px;font-size:13px;color:var(--weak);font-weight:600;padding-top:5px}
.feed-content h3{font-size:18px;margin-bottom:8px;font-weight:700}
.feed-content h3 a{transition:color .2s}
.feed-content h3 a:hover{color:var(--blue)}
.feed-content p{font-size:14px;color:var(--mid);max-width:640px;line-height:1.6}
.feed-tags{display:flex;gap:8px;margin-top:10px}
.tag{display:inline-block;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px}
.tag-orange{background:var(--orange-soft);color:var(--orange)}
.feed-aside{display:flex;flex-direction:column;gap:24px;position:sticky;top:102px}
.aside-card{background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:var(--shadow-sm);padding:24px;overflow:hidden}
.aside-card h3{font-size:1.05rem;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.aside-card h3 span{color:var(--orange);font-family:Georgia,serif}
.aside-links{display:flex;flex-direction:column;gap:4px}
.aside-links a{display:flex;justify-content:space-between;align-items:center;padding:9px 12px;border-radius:10px;color:var(--mid);font-size:14px;transition:.2s}
.aside-links a:hover{background:var(--blue-soft);color:var(--blue)}
.aside-note{font-size:13px;color:var(--weak);line-height:1.6;padding:10px 12px;background:var(--panel);border-radius:10px;margin-top:8px}

/* FAQ */
.faq-section{background:var(--surface)}
.faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;transition:box-shadow .2s}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-item summary{display:flex;justify-content:space-between;gap:24px;padding:20px 24px;cursor:pointer;font-size:16px;font-weight:700;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-arrow{flex:0 0 28px;height:28px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;transition:transform .25s,background .25s;font-size:18px}
.faq-item[open] .faq-arrow{transform:rotate(45deg);background:var(--blue);color:#fff}
.faq-answer{padding:0 24px 22px;color:var(--mid);font-size:15px;line-height:1.8}
.faq-answer strong{color:var(--text)}

/* CTA final */
.cta-final{background:var(--bg)}
.cta-box{
  position:relative;background:#1E4F9F center/cover no-repeat;border-radius:28px;color:#fff;
  padding:70px 56px;overflow:hidden;text-align:center;box-shadow:0 30px 60px rgba(22,39,58,.18);
}
.cta-box::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(600px 260px at 20% 0%,rgba(255,255,255,.14),transparent 65%),
    radial-gradient(480px 200px at 85% 100%,rgba(255,122,61,.25),transparent 60%);
  pointer-events:none;
}
.cta-box h2{position:relative;font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:18px;color:#fff}
.cta-box p{position:relative;color:rgba(255,255,255,.82);font-size:16px;max-width:620px;margin:0 auto 30px}
.cta-box .cta-actions{position:relative;display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.cta-link{display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.82);font-weight:600;padding:10px 8px;font-size:15px}
.cta-link:hover{color:#fff;text-decoration:underline}

/* Footer */
.site-footer{background:#F1F5FA;border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr 1fr;gap:48px;padding-bottom:50px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:var(--mid);font-size:14px;max-width:320px;line-height:1.75}
.footer-social{display:flex;gap:8px;margin-top:20px}
.footer-col h3{font-size:16px;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{color:var(--mid);font-size:14px;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--blue);padding-left:4px}
.footer-legal{font-size:12.5px;color:var(--weak);line-height:1.7}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;color:var(--weak);font-size:13px}
.footer-bottom a{color:var(--weak)}
.footer-bottom a:hover{color:var(--blue)}

/* Bottom bar */
.bottom-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  background:rgba(255,255,255,.96);border-top:1px solid var(--line);
  box-shadow:0 -8px 30px rgba(23,56,90,.10);transform:translateY(110%);transition:transform .3s ease,opacity .3s;
  opacity:0;pointer-events:none;
}
.bottom-bar.show{transform:translateY(0);opacity:1;pointer-events:auto}
.bar-inner{max-width:1180px;margin:0 auto;padding:10px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.bar-text{font-size:15px;font-weight:700;color:var(--text)}
.bar-text span{color:var(--weak);font-weight:400}
.bar-actions{display:flex;align-items:center;gap:10px}
.bar-close{width:36px;height:36px;display:grid;place-items:center;border:0;background:transparent;color:var(--weak);font-size:22px;cursor:pointer;border-radius:50%;transition:background .2s,color .2s}
.bar-close:hover{background:var(--blue-soft);color:var(--blue)}
.bar-btn{min-height:40px;padding:8px 18px;font-size:14px}
.bottom-spacer{height:0}

.mobile-menu{display:none}

/* Responsive */
@media (max-width:1023px){
  .desktop-nav,.header-actions .searchform,.header-actions .btn-login,.header-actions .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-menu{
    display:block;max-height:0;overflow:hidden;transition:max-height .35s ease;
    background:#fff;border-top:1px solid var(--line);
  }
  #nav-check:checked ~ .mobile-menu{max-height:520px;border-top-color:rgba(47,107,255,.12)}
  .mobile-inner{padding:20px 24px 26px;display:flex;flex-direction:column;gap:18px}
  .mobile-nav{display:flex;flex-direction:column;gap:6px}
  .mobile-nav a{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-radius:12px;color:var(--text);font-weight:600;font-size:15px}
  .mobile-nav a:hover{background:var(--blue-soft);color:var(--blue)}
  .mobile-nav a[aria-current]::after{content:"当前";font-size:11px;background:var(--blue-soft);color:var(--blue);padding:3px 10px;border-radius:999px;font-weight:600}
  .mobile-search .searchform{width:100%}
  .mobile-btns{display:flex;flex-wrap:wrap;gap:10px}
  .mobile-btns .btn{flex:1 1 160px}
  .hero{padding-top:130px;padding-bottom:70px}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-panel{max-width:100%}
  .scene-primary{grid-column:span 12}
  .scene-stack{grid-column:span 12}
  .features-grid{grid-template-columns:1fr 1fr}
  .proof-grid{grid-template-columns:1fr;gap:34px}
  .proof-left{max-width:100%}
  .feed-layout{grid-template-columns:1fr}
  .feed-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px}
  .header-main{height:68px}
  .logo{font-size:18px}
  .section{padding:64px 0}
  .hero{padding-top:112px}
  .hero-sub{font-size:16px}
  .hero-facts{grid-template-columns:repeat(3,1fr);gap:10px}
  .hero-fact b{font-size:1.25rem}
  .hero-fact span{font-size:11.5px;line-height:1.4}
  .hero-panel{padding:20px}
  .features-grid{grid-template-columns:1fr}
  .feature-card{padding:26px 22px}
  .scene-primary .scene-media{min-height:220px}
  .scene-stack .scene-card{grid-template-columns:92px 1fr;min-height:0}
  .scene-stack .scene-media{min-height:150px}
  .scene-stack .scene-body p{display:none}
  .proof-list{grid-template-columns:1fr}
  .feed-layout{gap:30px}
  .feed-item{flex-direction:column;gap:6px}
  .feed-date{padding-top:0}
  .cta-box{padding:48px 24px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:36px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;text-align:center}
  .bar-inner{padding:8px 16px}
  .bar-text{font-size:13px;line-height:1.5}
  .bar-text span{display:none}
  .bar-close{width:32px;height:32px;font-size:20px}
  .bottom-spacer{height:76px}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
}

/* roulang page: category1 */
:root{
 --blue:#2F6BFF;
 --blue-light:#4D8DFF;
 --blue-soft:#EEF4FF;
 --orange:#FF7A3D;
 --orange-soft:#FFF2EA;
 --text:#16273A;
 --mid:#4B5E70;
 --weak:#7D8FA0;
 --bg:#F3F7FD;
 --panel:#F8FAFE;
 --surface:#FFFFFF;
 --line:rgba(47,107,255,.10);
 --deep-blue:#1E3A5F;
 --radius-sm:8px;
 --radius-md:14px;
 --radius-lg:20px;
 --shadow-sm:0 10px 24px rgba(23,56,90,.06);
 --shadow-card:0 12px 30px rgba(23,56,90,.08);
 --shadow-lg:0 20px 44px rgba(23,56,90,.14);
 --font:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
html{scroll-behavior:smooth}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;padding-top:76px}
body.menu-open{overflow:hidden}
a{color:inherit;text-decoration:none}
a:hover{color:var(--blue)}
p{color:var(--mid)}
img{display:block;max-width:100%;height:auto}
button,input,select{font-family:inherit}
button{cursor:pointer}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding-top:88px;padding-bottom:88px}
a:focus-visible,summary:focus-visible,button:focus-visible,input:focus-visible{
 outline:3px solid rgba(47,107,255,.35);outline-offset:3px;border-radius:6px;
}

.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 border:0;border-radius:999px;cursor:pointer;font-weight:600;
 padding:11px 22px;font-size:15px;line-height:1.3;min-height:44px;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 12px 22px rgba(255,122,61,.22)}
.btn-primary:hover{background:#FF9A58;color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px rgba(255,122,61,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:var(--surface);color:var(--blue);border:1px solid rgba(47,107,255,.32);box-shadow:var(--shadow-sm)}
.btn-outline:hover{background:var(--blue-soft);color:var(--blue);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.btn-outline:active{transform:translateY(0)}
.btn-navy{background:var(--deep-blue);color:#fff;box-shadow:var(--shadow-card)}
.btn-navy:hover{background:#284A74;color:#fff;transform:translateY(-2px)}

.badge,.tag{display:inline-flex;align-items:center;border-radius:999px;font-size:12px;padding:4px 11px;font-weight:600;line-height:1.6}
.tag{background:var(--blue-soft);color:var(--blue)}
.tag-orange{background:var(--orange-soft);color:#D95E1B}
.badge{background:var(--blue);color:#fff}
.badge-orange{background:var(--orange);color:#fff}

.site-header{
 position:fixed;top:0;left:0;right:0;z-index:60;
 background:rgba(255,255,255,.88);backdrop-filter:blur(10px);
 transition:box-shadow .3s ease,background .3s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.98);box-shadow:0 8px 30px rgba(23,56,90,.08)}
.header-main{display:flex;align-items:center;gap:12px;height:76px}
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px;color:var(--text);font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo svg{flex:0 0 auto}
.logo:hover{color:var(--text)}
.logo-text{white-space:nowrap}
.desktop-nav{display:flex;gap:4px;margin-left:18px}
.nav-link{position:relative;display:inline-flex;align-items:center;padding:9px 14px;border-radius:999px;font-weight:600;font-size:15px;color:var(--mid);transition:color .2s,background .2s;white-space:nowrap}
.nav-link:hover{color:var(--blue);background:var(--blue-soft)}
.nav-link[aria-current]::after{content:"";position:absolute;left:20px;right:20px;bottom:3px;height:3px;border-radius:99px;background:var(--blue)}
.header-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.searchform{display:flex;align-items:center;background:#EDF2F8;border-radius:999px;padding:0 6px 0 14px;border:1px solid transparent;overflow:hidden;transition:width .2s,background .2s,border-color .2s;width:180px}
.searchform:focus-within{background:#fff;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,107,255,.10)}
.searchform input{border:0;outline:0;background:transparent;font-size:14px;padding:9px 0;color:var(--text);width:100%}
.searchform button{border:0;background:transparent;color:var(--weak);width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;cursor:pointer;border-radius:50%;transition:color .2s,background .2s}
.searchform button:hover{color:var(--blue);background:#E0E9F5}
.btn-login{background:transparent;border:0;color:var(--mid);font-weight:600;min-height:40px;padding:0 12px;border-radius:999px;cursor:pointer;transition:color .2s,background .2s}
.btn-login:hover{color:var(--blue);background:var(--blue-soft)}
.header-cta{min-height:42px;padding:9px 20px;border-radius:999px;background:var(--orange);color:#fff}
.header-cta:hover{background:#FF9A58;color:#fff;transform:translateY(-2px)}
.header-cta svg{margin-right:4px}
.nav-toggle{display:none;align-items:center;align-self:center;cursor:pointer;gap:8px;border:1px solid var(--line);background:#fff;padding:9px 14px;border-radius:999px}
.nav-toggle .bar{display:block;width:18px;height:2px;background:var(--text);margin:3px 0;transition:.3s}
.nav-check{position:absolute;opacity:0;pointer-events:none}
.mobile-menu{display:none}
#nav-check:focus-visible ~ .header-main .nav-toggle{outline:3px solid rgba(47,107,255,.35)}

.category-banner{
 position:relative;padding:106px 0 84px;overflow:hidden;
 background:
  linear-gradient(120deg,rgba(248,250,254,.96) 0%,rgba(243,247,253,.92) 52%,rgba(230,239,250,.85) 100%),
  url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
}
.category-banner::after{content:"";position:absolute;right:-120px;top:32px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(77,141,255,.16),rgba(77,141,255,0) 70%);pointer-events:none}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--weak);margin-bottom:34px}
.breadcrumb a{color:var(--mid);transition:color .2s}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb [aria-current]{color:var(--blue);font-weight:600}
.banner-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(340px,.65fr);gap:56px;align-items:end;position:relative;z-index:1}
.banner-copy h1{font-size:clamp(1.9rem,4vw,3.1rem);line-height:1.2;letter-spacing:-.04em;margin-bottom:16px}
.lead-copy{font-size:17px;color:var(--mid);max-width:660px;margin-bottom:34px}
.banner-tags{display:flex;align-items:center;gap:12px;padding-top:24px;border-top:1px solid rgba(47,107,255,.12)}
.banner-tags a{color:var(--mid);font-weight:600}
.banner-tags a:hover{color:var(--blue)}
.banner-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.stat-card{background:rgba(255,255,255,.75);border:1px solid rgba(47,107,255,.12);border-radius:16px;padding:22px 20px;backdrop-filter:blur(4px)}
.stat-num{color:var(--blue);font-size:22px;font-weight:800;margin-bottom:8px;line-height:1.2}
.stat-text{font-size:13px;color:var(--mid);line-height:1.6}

.filter-wrap{background:var(--surface);box-shadow:var(--shadow-card);padding:30px;border-radius:20px;margin-top:-38px;position:relative;z-index:3;border:1px solid rgba(47,107,255,.10)}
.filter-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.filter-label{display:inline-flex;align-items:center;font-size:14px;font-weight:700;color:var(--text);margin-right:6px}
.pill{display:inline-flex;align-items:center;gap:6px;border:1px solid #E2E8F2;background:#fff;color:var(--mid);border-radius:999px;font-size:14px;font-weight:600;padding:8px 16px;min-height:40px;transition:all .2s ease}
.pill:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue)}
.pill.active{background:var(--blue);border-color:var(--blue);color:#fff}
.channel-note{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px;font-size:14px;color:var(--weak)}
.dot-list{display:inline-flex;gap:6px;align-items:center;margin-right:14px}
.dot-list::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);display:inline-block}

.list-section{padding-top:76px;padding-bottom:86px}
.listing-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
.content-main{display:flex;flex-direction:column;gap:28px}
.channel-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:10px}
.channel-title h2{font-size:clamp(1.4rem,2.4vw,1.85rem);letter-spacing:-.02em}
.channel-title p{font-size:14px;color:var(--weak)}

.video-card{background:var(--surface);border:1px solid rgba(47,107,255,.08);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.featured-card{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);border-top:3px solid var(--orange)}
.card-cover{position:relative;overflow:hidden;min-height:220px}
.card-cover img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.card-cover .badge{position:absolute;left:16px;top:16px;z-index:2}
.card-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(30,58,95,.02),rgba(30,58,95,.14));pointer-events:none}
.card-body{padding:28px}
.card-title a{transition:color .2s}
.card-title a:hover{color:var(--blue)}
.card-title{font-size:clamp(1.25rem,2vw,1.55rem);line-height:1.4;margin-bottom:12px}
.card-desc{font-size:15px;line-height:1.75;margin-bottom:18px}
.card-meta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;color:var(--weak);font-size:13px;border-top:1px solid var(--line);padding-top:16px;margin-bottom:18px}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.card-meta svg{display:inline-block}

.row-card{display:grid;grid-template-columns:240px minmax(0,1fr);border-top:3px solid var(--blue-soft);gap:0}
.row-card:nth-child(3n){border-top-color:var(--orange)}
.row-thumb{position:relative;min-height:150px;overflow:hidden}
.row-thumb img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .4s ease}
.row-card:hover .row-thumb img{transform:scale(1.04)}
.row-card .card-body{padding:22px 26px}
.row-card .card-title{font-size:1.2rem;margin-bottom:8px}
.row-card .card-desc{font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px;color:var(--mid)}
.row-label{font-size:13px;color:var(--blue);font-weight:700;letter-spacing:.02em}

.sidebar{display:flex;flex-direction:column;gap:26px}
.side-panel{background:#fff;border:1px solid rgba(47,107,255,.10);border-radius:18px;padding:27px;box-shadow:var(--shadow-sm)}
.side-panel h3{font-size:1.05rem;margin-bottom:20px;display:flex;align-items:center;justify-content:space-between;letter-spacing:-.01em}
.side-panel h3 span{color:var(--weak);font-weight:400;font-size:13px}
.rank-list{list-style:none}
.rank-item{display:flex;gap:14px;padding:13px 0;border-bottom:1px dashed #EDF1F7;align-items:flex-start}
.rank-item:last-child{border-bottom:0}
.rank-num{font-weight:800;font-size:1.25rem;color:#C9D4E4;flex:0 0 30px;line-height:1.3}
.rank-item:nth-child(-n+3) .rank-num{color:var(--orange)}
.rank-body{display:block;min-width:0}
.rank-body a{font-weight:600;font-size:15px;line-height:1.5;color:var(--text);transition:color .2s}
.rank-body a:hover{color:var(--blue)}
.rank-meta{font-size:12px;color:var(--weak);margin-top:4px;display:block}
.entry-links{list-style:none;display:flex;flex-direction:column}
.entry-links a{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid #EEF2F8;font-weight:600;color:var(--mid);transition:all .2s}
.entry-links a:last-child{border-bottom:0}
.entry-links a:hover{color:var(--blue);padding-left:6px}
.entry-links svg{width:14px;height:14px;color:var(--weak)}
.news-list li{list-style:none;padding:11px 0;border-bottom:1px dashed #EEF3F9;font-size:13.5px;color:var(--mid);line-height:1.6}
.news-list li:last-child{border-bottom:0}
.news-list b{display:block;color:var(--text)}
.news-list small{color:var(--weak)}

.video-list-blocks{display:flex;flex-direction:column;gap:24px;margin-top:24px}
.section-note{font-size:14px;color:var(--weak)}

.pagination{display:flex;align-items:center;justify-content:center;gap:12px;margin:44px 0 6px}
.page-link{min-width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:999px;background:#fff;color:var(--mid);font-size:14px;font-weight:600;border:1px solid #E2E8F2;padding:0 18px;transition:all .2s ease}
.page-link:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue)}
.page-link.active{background:var(--blue);border-color:var(--blue);color:#fff}
.page-link[aria-disabled]{opacity:.55;pointer-events:none}

.explore-sect{position:relative;padding:86px 0;overflow:hidden;background:linear-gradient(110deg,rgba(238,244,255,.9),rgba(248,250,254,.82)),url('/assets/images/backpic/back-3.jpg') center/cover no-repeat}
.explore-sect::before{content:"";position:absolute;left:32px;top:-90px;width:240px;height:240px;border-radius:50%;box-shadow:0 0 0 70px rgba(47,107,255,.06);pointer-events:none}
.explore-inner{position:relative;z-index:2;text-align:center;max-width:740px;margin:0 auto}
.explore-inner h2{font-size:clamp(1.5rem,3vw,2.3rem);letter-spacing:-.03em;margin-bottom:16px}
.explore-inner p{font-size:16px;margin-bottom:28px}
.explore-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

.site-footer{background:var(--deep-blue);color:#C6D0DD}
.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr;gap:40px;padding:64px 0 40px}
.footer-brand{max-width:360px}
.footer-brand .logo{color:#fff;font-size:19px}
.footer-brand .logo:hover{color:#fff}
.footer-brand p{font-size:14px;color:#B9C6D4;line-height:1.8;margin-top:16px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:18px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{color:#AEBCCB;font-size:14px;transition:all .2s}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:24px 0;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8FA2B5}

@media (max-width:1023px){
 .header-main{height:70px}
 .desktop-nav{display:none}
 .nav-toggle{display:inline-flex}
 .header-actions .searchform{display:none}
 .mobile-menu{display:none;background:#fff;border-top:1px solid rgba(47,107,255,.10);box-shadow:0 20px 30px rgba(23,56,90,.08)}
 .nav-check:checked ~ .mobile-menu{display:block}
 .mobile-inner{padding:18px 24px 26px}
 .mobile-nav{display:flex;flex-direction:column;gap:2px}
 .mobile-nav a{padding:13px 8px;font-size:16px;font-weight:600;color:var(--mid);border-bottom:1px solid #F0F3F8;transition:all .2s;border-radius:8px}
 .mobile-nav a:hover{color:var(--blue);background:var(--blue-soft)}
 .mobile-nav a[aria-current]{color:var(--blue)}
 .mobile-search{margin-top:16px}
 .mobile-search .searchform{width:100%;background:#F3F6FB;border:1px solid #E4EAF3}
 .banner-grid{grid-template-columns:1fr 1fr;gap:32px}
 .listing-layout{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
 .header-main{height:64px}
 .logo{gap:8px;font-size:18px}
 .logo svg{width:25px;height:25px}
 .header-cta{display:none}
 .btn-login{padding:0 6px;font-size:14px}
 .section{padding-top:56px;padding-bottom:56px}
 .container{padding-left:16px;padding-right:16px}
 .category-banner{padding:64px 0 92px}
 .breadcrumb{margin-bottom:20px}
 .banner-grid{grid-template-columns:1fr;gap:18px}
 .lead-copy{font-size:15px}
 .banner-tags{flex-wrap:wrap}
 .banner-stats{grid-template-columns:1fr;gap:10px}
 .stat-card{padding:14px 16px}
 .filter-wrap{padding:20px 16px;margin-top:-26px}
 .filter-row{gap:8px}
 .pill{font-size:13px;padding:7px 14px}
 .filter-label,.channel-note{font-size:13px}
 .channel-title{flex-direction:column;align-items:flex-start;gap:6px}
 .featured-card{grid-template-columns:1fr}
 .card-cover{min-height:190px}
 .card-body{padding:20px}
 .row-card{grid-template-columns:1fr}
 .row-thumb{min-height:165px}
 .row-card .card-body{padding:18px 20px}
 .video-list-blocks{gap:14px}
 .pagination{gap:7px}
 .page-link{padding:0 10px}
 .explore-sect{padding:58px 0}
 .explore-actions{flex-direction:column;align-items:center}
 .explore-actions .btn{width:100%;max-width:320px}
 .footer-grid{grid-template-columns:1fr;padding:48px 0 24px}
 .footer-brand{max-width:100%}
 .footer-bottom{flex-direction:column;gap:6px}
 .footer-bottom span{font-size:12px}
}
@media (prefers-reduced-motion:reduce){
 *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}