/* roulang page: index */
:root{
  --bg:#060D17;
  --bg2:#0B1620;
  --glass:rgba(19,36,52,0.66);
  --glass-2:rgba(10,22,34,0.78);
  --stroke:rgba(138,179,205,0.28);
  --stroke-2:rgba(138,179,205,0.55);
  --cyan:#18D6EC;
  --cyan-dark:#0EAFD0;
  --amber:#FF9E3D;
  --text:#E9F2FA;
  --text-2:#92AABF;
  --muted:#5C7184;
  --radius-lg:20px;
  --radius-md:14px;
  --shadow-card:0 10px 30px rgba(0,10,20,0.28);
  --shadow-card-hover:0 18px 44px rgba(0,10,20,0.42);
  --font-h:550 30px/1.3 "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-body:15px/1.75 "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-num:"DIN Alternate","Roboto Condensed","Arial Narrow",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font:var(--font-body);-webkit-font-smoothing:antialiased}
body.nav-open{overflow:hidden}
.container{max-width:1240px;margin:0 auto;padding:0 28px}
a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}
img{display:block;max-width:100%}
button,input{font-family:inherit}
ul,ol{li list-style:none}
section{position:relative}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.section{padding:110px 0;position:relative}
.section-tight{padding:76px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:46px}
.sec-title-wrap{max-width:780px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.12em;color:var(--cyan);text-transform:uppercase;margin-bottom:14px;font-weight:600}
.eyebrow::before{content:"";width:34px;height:2px;background:linear-gradient(90deg,var(--cyan),transparent);border-radius:6px}
.sec-title{font-size:clamp(27px,3.6vw,38px);font-weight:700;line-height:1.25;letter-spacing:.02em}
.sec-lead{color:var(--text-2);font-size:16px;margin-top:12px;max-width:760px;line-height:1.8}
.sec-more{white-space:nowrap;padding:10px 22px;border:1px solid var(--stroke);border-radius:999px;color:var(--text);transition:.3s;background:rgba(255,255,255,.03)}
.sec-more:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 22px rgba(24,214,236,.16)}
.section-line{border-top:1px solid rgba(138,179,205,.14)}
.divider-h{height:1px;margin:100px auto;max-width:1240px;background:linear-gradient(90deg,transparent,rgba(138,179,205,.35),transparent)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 28px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;transition:all .26s ease;cursor:pointer;text-align:center}
.btn-primary{background:linear-gradient(135deg,#14C8E8,#06A7D6);color:#03131A;box-shadow:0 0 22px rgba(24,214,236,.25),0 8px 20px rgba(0,180,220,.18)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 38px rgba(24,214,236,.5),0 14px 26px rgba(0,160,210,.25);color:#001015}
.btn-ghost{background:rgba(255,255,255,.04);border-color:rgba(138,179,205,.45);color:var(--text);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 26px rgba(24,214,236,.16);transform:translateY(-2px)}
.btn-amber{background:linear-gradient(135deg,#FFB85C,#F57F20);color:#2B1808;box-shadow:0 8px 22px rgba(255,158,61,.22);min-height:42px;padding:0 22px}
.btn-amber:hover{box-shadow:0 0 34px rgba(255,158,61,.45);transform:translateY(-2px)}
.btn-block{width:100%}

.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;background:rgba(24,214,236,.1);border:1px solid rgba(24,214,236,.32);color:#97ECFC;font-size:12px;line-height:1.4}
.tag-amber{background:rgba(255,158,61,.1);border-color:rgba(255,158,61,.32);color:#FFC27A}
.tag-muted{background:rgba(138,179,205,.08);border-color:rgba(138,179,205,.28);color:var(--text-2)}
.glass{background:var(--glass);border:1px solid var(--stroke);border-radius:var(--radius-lg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow-card)}

.hero{position:relative;min-height:90vh;display:flex;align-items:center;padding:120px 0 90px;overflow:hidden;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;background-attachment:fixed}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,13,23,.93) 0%,rgba(5,13,23,.68) 47%,rgba(8,20,32,.38) 100%)}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(24,214,236,.08) 1px,transparent 1px);background-size:24px 24px;opacity:.6;pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .9fr;gap:56px;align-items:center}
.hero-kicker{display:flex;align-items:center;gap:8px;color:#8FE9F7;font-size:13px;letter-spacing:.16em;margin-bottom:22px}
.hero-kicker i{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan)}
.hero h1{font-size:clamp(31px,4.7vw,58px);font-weight:800;line-height:1.18;letter-spacing:.02em;margin-bottom:26px;color:#F6FCFF}
.hero-sub{font-size:clamp(15px,2vw,18px);color:#AFC7DC;line-height:1.85;max-width:640px;margin-bottom:34px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:34px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-badges .tag{font-size:13px;padding:7px 16px}
.hero-side{display:flex;flex-direction:column;gap:18px;position:relative}
.hero-panel{padding:28px;border-radius:24px;background:rgba(14,31,45,.72);border:1px solid var(--stroke);backdrop-filter:blur(18px);box-shadow:0 24px 60px rgba(3,12,22,.4)}
.panel-label{color:#CFE0ED;font-size:13px;letter-spacing:.08em;margin-bottom:18px;display:flex;justify-content:space-between}
.panel-label span:last-child{color:var(--cyan);font-family:var(--font-num)}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.metric{background:rgba(255,255,255,.035);border:1px solid rgba(138,179,205,.2);border-radius:16px;padding:20px 16px;transition:.3s}
.metric:hover{border-color:rgba(24,214,236,.35);background:rgba(24,214,236,.05)}
.metric-v{font-family:var(--font-num);font-size:35px;font-weight:700;color:#F4FEFF;line-height:1}
.metric-v small{font-size:14px;color:var(--cyan);margin-left:2px}
.metric-l{font-size:13px;color:#93AFC3;margin-top:8px;line-height:1.5}
.hero-note{margin-top:18px;padding:16px 18px;border-left:3px solid var(--amber);border-radius:0 14px 14px 0;background:rgba(255,158,61,.07)}
.hero-note p{font-size:14px;color:#D6DFE9}
.hero-note strong{color:#FFB566}

.stats-band{border-top:1px solid var(--stroke);border-bottom:1px solid var(--stroke);background:linear-gradient(180deg,rgba(11,22,32,.88),rgba(6,13,23,.4));padding:32px 0;position:relative;z-index:2}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.stat-item{display:flex;flex-direction:column;gap:10px}
.stat-num{font-family:var(--font-num);font-size:clamp(30px,4vw,46px);font-weight:700;color:var(--cyan);line-height:1}
.stat-num span{font-size:16px;color:#0FA6BD;margin-left:4px;font-weight:600}
.stat-label{color:var(--text-2);font-size:14px}

.cat-section{background:var(--bg2);overflow:hidden}
.cat-section::before{content:"";position:absolute;bottom:-180px;right:-180px;width:430px;height:430px;border-radius:50%;background:radial-gradient(circle,rgba(24,214,236,.09),transparent 70%);pointer-events:none}
.cat-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;position:relative;z-index:2}
.cat-card{border-radius:22px;overflow:hidden;border:1px solid var(--stroke);background:var(--glass);backdrop-filter:blur(14px);transition:transform .35s,border-color .35s,box-shadow .35s;box-shadow:var(--shadow-card)}
.cat-card:hover{transform:translateY(-6px);border-color:rgba(24,214,236,.48);box-shadow:var(--shadow-card-hover),0 0 38px rgba(24,214,236,.12)}
.cat-inner{display:flex;flex-direction:column;height:100%;color:inherit}
.cat-media{position:relative;overflow:hidden;aspect-ratio:16/8.6}
.cat-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.cat-card:hover .cat-media img{transform:scale(1.06)}
.cat-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(8,18,28,.78));opacity:.85}
.cat-no{position:absolute;left:22px;top:18px;z-index:2;font-family:var(--font-num);font-size:14px;color:rgba(255,255,255,.85);letter-spacing:.1em;background:rgba(6,13,23,.42);border:1px solid rgba(255,255,255,.22);padding:6px 14px;border-radius:999px;backdrop-filter:blur(10px)}
.cat-flag{position:absolute;right:20px;bottom:18px;z-index:2;color:#E3F6FF;font-size:13px;letter-spacing:.08em}
.cat-info{padding:28px;display:flex;flex-direction:column;flex:1}
.cat-info h3{font-size:24px;font-weight:700;letter-spacing:.02em;margin-bottom:10px}
.cat-info p{color:var(--text-2);font-size:15px;line-height:1.8;flex:1}
.cat-link{margin-top:22px;display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;color:var(--cyan)}
.cat-link .arr{transition:transform .3s}
.cat-card:hover .cat-link .arr{transform:translateX(8px)}

.latest-section{background:linear-gradient(180deg,#060D17 0%,#08111C 50%,#060D17 100%)}
.latest-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:start}
.cms-list{display:flex;flex-direction:column;gap:22px}
.feature-article{overflow:hidden;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--stroke);transition:.35s}
.feature-article:hover{border-color:rgba(24,214,236,.42);box-shadow:0 18px 50px rgba(3,15,26,.38)}
.feature-article .art-media{aspect-ratio:16/8;overflow:hidden;position:relative}
.feature-article .art-media img{width:100%;height:100%;object-fit:cover;transition:.5s}
.feature-article:hover .art-media img{transform:scale(1.04)}
.feature-article .art-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(8,18,28,.28))}
.feature-article .art-body{padding:28px}
.art-tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.feature-article h3{font-size:22px;line-height:1.4;margin-bottom:12px;transition:.3s}
.feature-article:hover h3{color:#BDF3FF}
.feature-article .art-summary{color:var(--text-2);font-size:15px;line-height:1.75;margin-bottom:18px}
.art-meta{display:flex;align-items:center;justify-content:space-between;gap:14px;color:#8AA1B5;font-size:13px}
.art-meta time::before{content:"◆";color:var(--cyan);margin-right:7px;font-size:10px;opacity:.8}
.read-more{display:inline-flex;color:var(--cyan);font-weight:600;gap:5px}
.read-more i{transition:transform .3s}
.feature-article:hover .read-more i{transform:translateX(5px)}
.news-sublist{display:flex;flex-direction:column;gap:0;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--stroke);background:var(--glass)}
.news-row-item{background:transparent;border-bottom:1px solid rgba(138,179,205,.14);transition:.3s;position:relative}
.news-row-item:last-child{border-bottom:none}
.news-row-item:hover{background:rgba(24,214,236,.055)}
.row-link{display:block;padding:20px 22px;color:inherit;height:100%}
.news-row-item .row-tag{font-size:12px;margin-bottom:9px}
.row-link h3{font-size:16px;line-height:1.6;font-weight:600;margin-bottom:9px;transition:.25s}
.news-row-item:hover h3{color:#BDf3ff}
.row-meta{display:flex;justify-content:space-between;color:#8AA1B5;font-size:12.5px}
.cms-empty{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:220px;text-align:center;border-radius:20px;border:1px dashed rgba(138,179,205,.35);background:rgba(15,32,45,.2);padding:36px;color:#8CABC3;font-size:15px}
.cms-empty .empty-ico{width:58px;height:58px;border:2px solid var(--stroke);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--cyan);margin-bottom:16px}
.cms-empty p{font-size:15px}

.reco-section{background:var(--bg)}
.reco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.reco-card{position:relative;border-radius:19px;overflow:hidden;border:1px solid var(--stroke);background:rgba(19,36,52,.46);transition:.35s;box-shadow:var(--shadow-card)}
.reco-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-5px);border-color:rgba(255,158,61,.42)}
.reco-media{aspect-ratio:16/10;overflow:hidden;position:relative}
.reco-media img{width:100%;height:100%;object-fit:cover;transition:.5s}
.reco-card:hover .reco-media img{transform:scale(1.06)}
.reco-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(6,13,23,.55))}
.reco-reason{position:absolute;left:14px;bottom:14px;z-index:2;background:rgba(6,13,23,.56);border:1px solid rgba(255,158,61,.45);color:#FFC488;font-size:12px;padding:5px 12px;border-radius:999px;backdrop-filter:blur(8px)}
.reco-body{padding:22px}
.reco-body .tag{margin-bottom:12px}
.reco-body h3{font-size:18px;line-height:1.55;margin-bottom:9px;font-weight:700}
.reco-body p{color:var(--text-2);font-size:14px;line-height:1.7}

.cta-band{margin:110px 0;position:relative;
 background:linear-gradient(150deg,rgba(10,33,48,.7),rgba(11,23,34,.76)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
 border-top:1px solid var(--stroke);border-bottom:1px solid var(--stroke)}
.cta-band .container{position:relative;z-index:2;text-align:center;padding:86px 28px}
.cta-transfer{max-width:720px;margin:0 auto}
.cta-transfer h2{font-size:clamp(26px,3.4vw,39px);font-weight:800;line-height:1.33;margin-bottom:16px}
.cta-transfer p{color:#AEC7D9;margin-bottom:34px;font-size:16px}
.cta-btn-group{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:20px}
.share-hint{color:#7692A8;font-size:13px;display:flex;align-items:center;justify-content:center;gap:10px}
.share-hint .share-icons{display:inline-flex;gap:9px}
.share-pill{width:38px;height:38px;border-radius:12px;border:1px solid var(--stroke);background:rgba(255,255,255,.04);display:inline-flex;align-items:center;justify-content:center;color:#BCD6E6;font-size:15px;cursor:pointer;transition:.28s}
.share-pill:hover{color:#FFB05E;border-color:rgba(255,158,61,.5);box-shadow:0 0 14px rgba(255,158,61,.14)}

.sub-soon{padding:0 0 120px}
.sub-card{max-width:880px;margin:0 auto;padding:50px;text-align:center;border-radius:24px;position:relative;overflow:hidden;border:1px solid var(--stroke);background:rgba(16,32,47,.68);backdrop-filter:blur(22px)}
.sub-card::before{content:"";position:absolute;width:380px;height:380px;border-radius:50%;top:-230px;left:-100px;background:radial-gradient(circle,rgba(24,214,236,.16),transparent 70%);pointer-events:none}
.sub-card h3{font-size:clamp(22px,2.6vw,32px);margin-bottom:10px}
.sub-card>p{color:var(--text-2);max-width:560px;margin:0 auto 30px}
.sub-form{display:flex;gap:12px;max-width:600px;margin:22px auto 0;position:relative;z-index:2}
.sub-input{flex:1;height:50px;padding:0 18px;border-radius:999px;background:rgba(7,16,26,.66);border:1px solid var(--stroke);color:var(--text);font-size:15px;transition:.3s}
.sub-input:hover{border-color:rgba(24,214,236,.4)}
.sub-input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 18px rgba(24,214,236,.16);background:rgba(7,16,26,.87)}
.sub-tip{color:var(--muted);font-size:13px;margin-top:16px}
.form-feedback{margin-top:12px;font-size:14px;min-height:20px}
.form-feedback.success{color:#6FE3C6}
.form-feedback.error{color:#FF8A7A}

.faq-section{background:var(--bg2)}
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{margin-bottom:16px;border:1px solid var(--stroke);border-radius:16px;background:rgba(15,28,43,.62);overflow:hidden;transition:.3s}
.faq-item.open{border-color:rgba(24,214,236,.38);box-shadow:0 10px 34px rgba(3,14,24,.4)}
.faq-question{width:100%;border:none;background:transparent;color:var(--text);padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:22px;font-size:16px;font-weight:600;cursor:pointer;text-align:left}
.faq-q{position:relative;padding-right:44px;line-height:1.5}
.faq-icon{color:var(--cyan);flex:0 0 auto;width:30px;height:30px;border:1px solid rgba(24,214,236,.42);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:300;font-size:22px;transition:.4s}
.faq-item.open .faq-icon{transform:rotate(135deg);background:rgba(24,214,236,.14)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .45s ease}
.faq-item.open .faq-answer{max-height:300px}
.faq-answer-content{padding:0 26px 24px;color:var(--text-2);font-size:15px;line-height:1.85}

.site-header{position:sticky;top:0;z-index:100;height:68px;display:flex;align-items:center;transition:background .3s,border-color .3s;border-bottom:1px solid transparent;background:rgba(6,13,23,.2);backdrop-filter:blur(0)}
.site-header.scrolled{background:rgba(6,14,23,.78);backdrop-filter:blur(16px);border-bottom-color:rgba(138,179,205,.15);box-shadow:0 6px 22px rgba(0,8,15,.2)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%}
.brand{display:inline-flex;flex-direction:column;line-height:1.12;color:#EBF6FF;padding:8px 0}
.brand-main{font-size:22px;font-weight:800;letter-spacing:.02em}
.brand-main span{color:var(--cyan)}
.brand-sub{font-size:11px;letter-spacing:.28em;color:#6CC8D8;margin-top:5px}
.site-nav{display:flex;align-items:center}
.site-nav>ul{display:flex;align-items:center;gap:4px}
.site-nav li a{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 16px;font-size:15px;font-weight:500;color:#C6D9E8;border-radius:10px;transition:.3s}
.site-nav li a:hover{color:var(--cyan)}
.site-nav li.active a{color:var(--cyan);background:rgba(24,214,236,.1);box-shadow:inset 0 -2px 0 var(--cyan);position:relative}
.nav-cta{margin-left:14px}
.nav-toggle{display:none;width:46px;height:46px;align-items:center;justify-content:center;background:rgba(255,255,255,.03);border:1px solid var(--stroke);border-radius:12px;color:var(--text);cursor:pointer}
.burger-line{width:20px;height:2px;background:#E9F2FA;position:relative}
.burger-line::before,.burger-line::after{content:"";position:absolute;left:0;width:20px;height:2px;background:#E9F2FA;transition:.3s}
.burger-line::before{top:-6px}
.burger-line::after{top:6px}
body.nav-open .burger-line{background:transparent}
body.nav-open .burger-line::before{top:0;transform:rotate(45deg)}
body.nav-open .burger-line::after{top:0;transform:rotate(-45deg)}

.footer{background:#050B12;border-top:1px solid rgba(138,179,205,.16);padding:76px 0 30px;position:relative}
.footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(24,214,236,.42),transparent)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;margin-bottom:58px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{color:#7693AB;font-size:14px;line-height:1.8;max-width:310px}
.footer-col h4{font-size:16px;font-weight:600;color:#D7EAFF;margin:14px 0 18px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:12px;color:#7E9AB1;font-size:14px;transition:.25s}
.footer-col ul li a{transition:.25s;display:inline-block}
.footer-col ul li a:hover{color:var(--cyan);transform:translateX(4px)}
.footer-subscribe small{color:#7E9AB1;display:block;margin-bottom:10px}
.footer-subscribe input{width:100%;height:42px;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--stroke);padding:0 14px;color:#fff;margin-bottom:10px;transition:.3s}
.footer-subscribe input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 14px rgba(24,214,236,.13)}
.footer-bottom{border-top:1px solid rgba(138,179,205,.13);padding-top:24px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#698197;font-size:13px}
.footer-bottom a{color:#92B8CB}
.footer-line-arrow{width:54px;height:20px;opacity:.5;display:inline-block}

@media (max-width:1023px){
  .hero{background-attachment:scroll}
  .hero-inner{grid-template-columns:1fr}
  .hero-side{max-width:620px}
  .latest-layout{grid-template-columns:1fr}
  .reco-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cat-grid{grid-template-columns:1fr}
  .site-nav{position:absolute;top:68px;left:0;right:0;background:rgba(6,15,25,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--stroke);display:none;padding:14px 20px 26px}
  body.nav-open .site-nav{display:block}
  .site-nav>ul{flex-direction:column;align-items:stretch;gap:4px}
  .site-nav li.active a{box-shadow:inset 3px 0 0 var(--cyan),none}
  .site-nav li a{height:50px;width:100%;font-size:16px;padding:0 18px;border-radius:12px}
  .nav-cta{margin:12px 0 0}
  .nav-cta .btn{width:100%}
  .nav-toggle{display:inline-flex}
}
@media (max-width:767px){
  .section{padding:70px 0}
  .divider-h{margin:70px auto}
  .container{padding:0 18px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:30px}
  .sec-more{align-self:flex-start}
  .hero{min-height:auto;padding:110px 0 56px}
  .hero-actions .btn{width:100%}
  .metric-grid{grid-template-columns:1fr 1fr}
  .hero-panel{padding:20px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item{border-left:1px solid var(--stroke);padding-left:14px}
  .cat-grid{gap:16px}
  .cat-info{padding:22px}
  .cat-info h3{font-size:22px}
  .reco-grid{grid-template-columns:1fr}
  .featured-list{grid-template-columns:1fr}
  .feature-article .art-body{padding:22px}
  .feature-article h3{font-size:20px}
  .sub-card{padding:32px 20px}
  .sub-form{flex-direction:column}
  .sub-input{width:100%}
  .sub-form .btn{width:100%}
  .cta-transfer{padding:0}
  .cta-band .container{padding:64px 18px}
  .footer-grid{grid-template-columns:1fr;padding-bottom:10px}
  .footer-bottom{justify-content:center;text-align:center}
}

/* roulang page: article */
:root{
  --night-1:#060d17;
  --night-2:#0b1620;
  --night-3:#10212e;
  --glass-bg:rgba(19,36,52,.68);
  --glass-line:rgba(138,179,205,.22);
  --cyan:#18d6ec;
  --cyan-deep:#26a5c4;
  --amber:#ff9e3d;
  --text-hi:#e9f2fa;
  --text-body:#c7dae7;
  --text-low:#92aabf;
  --text-dim:#5c7184;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-pill:999px;
  --shadow-card:0 8px 24px rgba(0,10,20,.28);
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  --font-num:"Roboto Condensed","DIN Alternate","Bahnschrift",sans-serif;
  --header-h:68px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  background:
    radial-gradient(circle at 75% 8%,rgba(24,214,236,.07),transparent 34rem),
    radial-gradient(circle at 10% 30%,rgba(255,158,61,.05),transparent 26rem),
    var(--night-1);
  color:var(--text-hi);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(165,210,225,.12) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.42;
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  top:-8%;left:-4%;
  width:55%;
  height:38%;
  background:linear-gradient(135deg,rgba(24,214,236,.1),rgba(24,214,236,0) 55%);
  filter:blur(50px);
  z-index:0;
  pointer-events:none;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{
  font-family:inherit;
  font-size:inherit;
  color:inherit;
}
ul,ol{list-style:none}
table{border-collapse:collapse;width:100%}
.container{
  width:min(1260px,calc(100% - 44px));
  margin-left:auto;
  margin-right:auto;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  height:46px;
  padding:0 24px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,background .25s ease;
  min-height:46px;
  white-space:nowrap;
}
.btn:focus-visible{outline:3px solid rgba(24,214,236,.35);outline-offset:3px}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));
  color:#04121c;
  box-shadow:0 0 0 1px rgba(24,214,236,.2),0 10px 28px rgba(24,214,236,.18);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(24,214,236,.55),0 14px 34px rgba(24,214,236,.3);
  color:#04121c;
}
.btn-amber{
  background:linear-gradient(135deg,#ffb354,#ff9e3d);
  color:#291300 !important;
  box-shadow:0 0 0 1px rgba(255,158,61,.25),0 8px 20px rgba(255,158,61,.22);
}
.btn-amber:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(255,158,61,.45),0 12px 28px rgba(255,158,61,.34);
}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(214,237,249,.26);
  color:var(--text-hi);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  box-shadow:0 0 18px rgba(24,214,236,.14);
  transform:translateY(-2px);
}
.btn-light{
  background:rgba(233,242,250,.96);
  color:#07101a;
  box-shadow:0 8px 30px rgba(3,12,20,.3);
}
.btn-light:hover{background:#fff;transform:translateY(-2px)}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(24,214,236,.1);
  border:1px solid rgba(24,214,236,.24);
  border-radius:var(--radius-pill);
  padding:5px 13px;
  font-size:13px;
  color:#82e8f4;
  font-weight:500;
}
.tag-amber{
  background:rgba(255,158,61,.1);
  border-color:rgba(255,158,61,.26);
  color:#ffc283;
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  height:var(--header-h);
  background:rgba(6,13,23,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(138,179,205,.14);
  transition:box-shadow .3s ease,background .3s ease;
}
.site-header.is-scrolled{box-shadow:0 12px 34px rgba(0,5,12,.36)}
.header-row{
  height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:flex;
  flex-direction:column;
  line-height:1;
  gap:2px;
  flex-shrink:0;
}
.brand-main{
  font-size:21px;
  letter-spacing:.02em;
  font-weight:800;
  color:#fff;
}
.brand-main span{
  color:var(--cyan);
}
.brand-sub{
  font-size:9px;
  letter-spacing:.34em;
  color:#7d97ad;
  text-transform:uppercase;
  font-family:var(--font-num);
}
.site-nav ul{
  display:flex;
  align-items:center;
  gap:5px;
}
.site-nav a{
  display:inline-block;
  padding:10px 15px;
  border-radius:var(--radius-pill);
  color:#b8c9d6;
  font-size:14.5px;
  position:relative;
  transition:color .25s ease,background .25s ease;
}
.site-nav a:hover{
  color:var(--cyan);
  background:rgba(24,214,236,.07);
}
.site-nav li.active a{
  color:var(--cyan);
  background:rgba(24,214,236,.11);
  box-shadow:inset 0 0 0 1px rgba(24,214,236,.12),0 -4px 0 -2px rgba(24,214,236,.6) inset;
}
.site-nav li.active a::after{
  content:"";
  position:absolute;
  left:17px;
  right:17px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 11px rgba(24,214,236,.6);
}
.site-nav .nav-cta a::after{display:none}
.nav-cta{
  margin-left:10px;
}
.nav-cta .btn{
  padding:0 18px;
  min-height:38px;
  border-radius:var(--radius-pill);
  font-size:14px;
}
.nav-toggle{
  display:none;
  border:0;
  background:rgba(255,255,255,.05);
  width:44px;
  height:44px;
  border-radius:12px;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid rgba(138,179,205,.16);
}
.burger-line{
  width:18px;
  height:2px;
  background:var(--text-hi);
  border-radius:9px;
  transition:transform .25s,opacity .25s;
}
.site-header.nav-open .burger-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
.site-header.nav-open .burger-line:nth-child(2){opacity:0}
.site-header.nav-open .burger-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.article-lead{
  position:relative;
  padding:100px 0 44px;
  border-bottom:1px solid rgba(138,179,205,.12);
  overflow:hidden;
  background:linear-gradient(180deg,rgba(6,13,23,.94),rgba(6,13,23,.82)),url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.article-lead::after{
  content:"";
  position:absolute;
  top:0;left:0;
  width:340px;
  height:4px;
  background:linear-gradient(90deg,var(--amber),transparent);
  opacity:.8;
}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:6px;
  font-size:13px;
  color:var(--text-low);
  margin-bottom:28px;
}
.breadcrumb a{
  transition:color .24s;
  position:relative;
  color:#a9c1d3;
}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .crumb-sep{opacity:.5}
.breadcrumb .crumb-current{
  color:var(--text-low);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  max-width:360px;
}
.article-lead-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(280px,390px);
  gap:36px;
  align-items:end;
}
.article-kicker{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:22px;
  flex-wrap:wrap;
}
.kicker-deco{
  width:54px;height:2px;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(24,214,236,.5);
  border-radius:4px;
  margin-right:2px;
}
.article-title{
  font-size:clamp(31px,4vw,50px);
  line-height:1.22;
  letter-spacing:.01em;
  font-weight:800;
  color:#fff;
  font-family:var(--font-main);
}
.article-deck{
  margin-top:18px;
  color:#adc3d2;
  font-size:16px;
  max-width:760px;
  line-height:1.8;
}
.article-meta{
  margin-top:24px;
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 16px;
  color:var(--text-low);
  font-size:14px;
}
.meta-dot{
  width:4px;height:4px;
  border-radius:50%;
  background:var(--text-dim);
}
.meta-item{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.meta-avatar{
  width:34px;
  height:34px;
  border-radius:50%;
  background:linear-gradient(135deg,rgba(24,214,236,.2),rgba(255,158,61,.15));
  border:1px solid rgba(24,214,236,.35);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  color:var(--cyan);
  font-weight:700;
}
.article-cover-card{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  background:var(--glass-bg);
  transform:translateY(18px);
}
.article-cover-card img{
  width:100%;
  height:240px;
  object-fit:cover;
}
.cover-card-tip{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 18px;
  font-size:13px;
  color:#a9c2d3;
  background:rgba(13,26,38,.6);
}
.article-main{
  position:relative;
  z-index:1;
  padding:42px 0 72px;
}
.article-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:42px;
  align-items:start;
}
.article-body{
  background:rgba(9,19,29,.62);
  border:1px solid rgba(138,179,205,.13);
  border-radius:var(--radius-lg);
  padding:clamp(24px,4vw,46px);
  color:var(--text-body);
  font-size:16.5px;
  line-height:1.9;
  backdrop-filter:blur(12px);
  overflow-wrap:break-word;
}
.article-body > * + *{margin-top:1.25em}
.article-body h2{
  font-size:27px;
  color:#e9f3fa;
  margin:1.8em 0 .7em;
  line-height:1.4;
  padding-left:15px;
  border-left:3px solid var(--cyan);
}
.article-body h3{
  font-size:21px;
  color:#dfeff6;
  margin:1.7em 0 .6em;
}
.article-body p{
  margin-bottom:0;
}
.article-body a{
  color:var(--cyan);
  border-bottom:1px solid rgba(24,214,236,.3);
  transition:border-color .25s;
}
.article-body a:hover{border-color:var(--cyan)}
.article-body strong{color:#cfe5f0}
.article-body blockquote{
  margin:1.7em 0;
  padding:18px 22px;
  background:rgba(24,214,236,.05);
  border-left:3px solid rgba(24,214,236,.7);
  border-radius:12px;
  color:#b6cfe0;
  font-style:normal;
}
.article-body ul,.article-body ol{
  margin:.8em 0;
  padding-left:1.2em;
}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.6em}
.article-body ul li::marker{color:var(--cyan)}
.article-body ol li::marker{color:var(--amber)}
.article-body img{
  border-radius:16px;
  border:1px solid rgba(138,179,205,.15);
  margin:1.8em 0;
  box-shadow:var(--shadow-card);
}
.article-body table{
  border:1px solid rgba(138,179,205,.18);
  margin:1.8em 0;
  border-radius:12px;
  overflow:hidden;
}
.article-body th{
  background:rgba(24,214,236,.09);
  color:#dbf6fa;
  padding:12px 14px;
  font-weight:600;
  border-bottom:1px solid rgba(138,179,205,.16);
}
.article-body td{
  padding:11px 14px;
  border-bottom:1px solid rgba(138,179,205,.08);
  color:#b4cad9;
}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  background:rgba(255,255,255,.07);
  border-radius:6px;
  padding:2px 7px;
  font-size:.92em;
}
.article-body .footnote-marker{color:var(--text-dim)}
.article-toolbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:34px;
  padding-top:22px;
  border-top:1px solid rgba(138,179,205,.12);
}
.toolbar-left,.toolbar-right{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}
.article-direct{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-top:30px;
}
.direct-card{
  border:1px solid rgba(138,179,205,.15);
  background:var(--glass-bg);
  backdrop-filter:blur(12px);
  border-radius:var(--radius-md);
  padding:20px 22px;
  display:flex;
  flex-direction:column;
  gap:8px;
  transition:border-color .26s,transform .26s;
}
.direct-card:hover{
  border-color:rgba(24,214,236,.5);
  transform:translateY(-3px);
}
.direct-card .direct-type{
  font-size:13px;
  color:var(--text-dim);
  display:flex;
  gap:6px;
  align-items:center;
}
.direct-card .direct-main{
  font-size:17px;
  font-weight:700;
  color:#d7e4ee;
}
.direct-card .direct-sub{
  font-size:13px;
  color:var(--text-low);
}
.article-aside{
  display:flex;
  flex-direction:column;
  gap:22px;
  position:sticky;
  top:calc(var(--header-h) + 24px);
}
.aside-card{
  border:1px solid rgba(138,179,205,.15);
  background:var(--glass-bg);
  border-radius:var(--radius-md);
  padding:22px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.aside-card .card-title{
  font-size:16px;
  color:var(--text-hi);
  margin-bottom:16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.aside-card .card-title::after{
  content:"";
  width:28px;
  height:2px;
  background:var(--amber);
  border-radius:2px;
}
.aside-origin{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding-bottom:15px;
  border-bottom:1px solid rgba(138,179,205,.12);
  margin-bottom:14px;
}
.aside-origin:last-child{border:0;margin:0;padding:0}
.aside-origin-icon{
  width:44px;
  height:44px;
  border-radius:12px;
  background:rgba(24,214,236,.1);
  border:1px solid rgba(24,214,236,.18);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  color:var(--cyan);
  font-weight:800;
}
.aside-origin .origin-name{color:#ddc9c9;color:var(--text-hi);font-weight:600;font-size:15px}
.aside-origin .origin-desc{font-size:13px;color:var(--text-low);line-height:1.6}
.aside-list{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.aside-topic{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:8px 11px;
  border-radius:10px;
  color:#b7cbda;
  font-size:14px;
  transition:color .22s,background .22s;
}
.aside-topic:hover{
  background:rgba(24,214,236,.09);
  color:var(--cyan);
}
.aside-topic i{
  font-style:normal;
  color:var(--text-dim);
  font-size:12px;
  transition:transform .2s;
}
.aside-topic:hover i{transform:translateX(3px);color:var(--cyan)}
.aside-sub-box{
  text-align:center;
  padding:25px 17px;
  border-radius:16px;
  background:linear-gradient(145deg,rgba(24,214,236,.07),rgba(6,13,23,.6));
  border:1px solid rgba(138,179,205,.13);
  position:relative;
  overflow:hidden;
}
.aside-sub-box::before{
  content:"";
  position:absolute;
  top:-20px;right:-20px;
  width:90px;height:90px;
  background:radial-gradient(circle,rgba(24,214,236,.18),transparent 70%);
}
.aside-sub-title{
  font-weight:700;
  color:#dcebf4;
  font-size:16px;
  margin-bottom:8px;
}
.aside-sub-text{
  font-size:13px;
  color:var(--text-low);
  margin-bottom:13px;
}
.aside-sub-box input{
  width:100%;
  border:1px solid rgba(138,179,205,.25);
  background:rgba(7,18,27,.68);
  height:42px;
  border-radius:var(--radius-pill);
  padding:0 16px;
  font-size:14px;
  margin-bottom:10px;
  transition:border-color .25s,box-shadow .25s;
}
.aside-sub-box input:focus{
  outline:0;
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(24,214,236,.15);
}
#asideSubMsg{font-size:13px;margin-top:5px;color:var(--amber);min-height:20px}
.related-section{
  padding:70px 0 20px;
}
.section-label{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:30px;
}
.section-label .label-en{
  font-size:11px;
  letter-spacing:.28em;
  color:var(--text-dim);
  text-transform:uppercase;
  font-family:var(--font-num);
}
.section-label h2{
  font-size:clamp(23px,3vw,32px);
  color:var(--text-hi);
  font-weight:800;
  letter-spacing:.02em;
}
.section-label .section-line{
  height:1px;
  background:linear-gradient(90deg,rgba(138,179,205,.35),transparent);
  flex:1;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.related-card{
  position:relative;
  border-radius:var(--radius-md);
  border:1px solid rgba(138,179,205,.14);
  overflow:hidden;
  background:var(--glass-bg);
  backdrop-filter:blur(12px);
  transition:transform .28s,border-color .28s,box-shadow .28s;
  min-height:230px;
  display:flex;
  flex-direction:column;
}
.related-card:hover{
  transform:translateY(-5px);
  border-color:rgba(24,214,236,.45);
  box-shadow:0 14px 34px rgba(0,10,20,.4),0 0 20px rgba(24,214,236,.05);
}
.related-card .rel-thumb{
  height:112px;
  overflow:hidden;
}
.related-card .rel-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s;
}
.related-card:hover .rel-thumb img{transform:scale(1.06)}
.related-card .rel-body{
  padding:15px 16px 17px;
  display:flex;
  flex-direction:column;
  gap:8px;
  flex:1;
}
.related-card .rel-title{
  font-weight:700;
  font-size:16px;
  color:#dcf0f8;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-card .rel-meta{
  margin-top:auto;
  font-size:12.5px;
  color:var(--text-dim);
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.footer-cta-band{
  margin-top:60px;
  border-radius:var(--radius-lg);
  border:1px solid rgba(138,179,205,.18);
  background:
    linear-gradient(110deg,rgba(24,214,236,.05),rgba(255,158,61,.04)),
    var(--night-2);
  padding:38px 34px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.footer-cta-band::after{
  content:"";
  position:absolute;
  right:-22px;bottom:-40px;
  width:180px;height:180px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,158,61,.12),transparent 65%);
}
.cta-band-title{
  font-size:22px;
  font-weight:800;
  margin-bottom:10px;
}
.cta-band-desc{
  color:var(--text-low);
  font-size:14.5px;
  max-width:600px;
}
.cta-buttons{
  display:flex;
  gap:12px;
  align-items:center;
  flex-wrap:wrap;
}
.article-empty{
  border:1px solid rgba(138,179,205,.15);
  background:var(--glass-bg);
  border-radius:var(--radius-lg);
  padding:clamp(50px,9vw,110px) 28px;
  text-align:center;
  backdrop-filter:blur(14px);
  max-width:800px;
  margin:60px auto 90px;
}
.article-empty .empty-icon{
  width:70px;height:70px;
  border-radius:50%;
  background:rgba(24,214,236,.08);
  border:1px solid rgba(24,214,236,.22);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:32px;
  color:var(--cyan);
  margin:0 auto 20px;
}
.article-empty h1{
  font-size:28px;
  margin-bottom:12px;
  color:#fff;
}
.article-empty p{
  color:var(--text-low);
  margin-bottom:24px;
}
.footer{
  background:rgba(4,10,16,.92);
  border-top:1px solid rgba(138,179,205,.14);
  margin-top:70px;
  position:relative;
  z-index:2;
}
.footer::before{
  content:"";
  display:block;
  height:1px;
  background:linear-gradient(90deg,var(--cyan),transparent 40%,transparent 65%,var(--amber));
  opacity:.5;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.27fr 1fr 1fr 1.25fr;
  gap:40px;
  padding:56px 0 42px;
}
.footer-brand .brand{margin-bottom:17px}
.footer-desc{
  font-size:14px;
  color:var(--text-low);
  line-height:1.8;
  max-width:340px;
}
.footer-col h4{
  color:#dceaf3;
  font-size:16px;
  font-weight:700;
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-col ul{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-col ul a,
.footer-col li a{
  color:#829bac;
  font-size:14px;
  transition:color .25s .1s;
  display:inline-block;
}
.footer-col ul a:hover,
.footer-col li a:hover{
  color:var(--cyan);
}
.footer-subscribe small{
  font-size:12.5px;
  color:var(--text-dim);
  display:block;
  margin-bottom:13px;
}
.footer-subscribe input{
  width:100%;
  height:42px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(138,179,205,.2);
  border-radius:var(--radius-pill);
  padding:0 17px;
  font-size:14px;
  margin-bottom:10px;
  transition:border-color .25s,box-shadow .25s;
}
.footer-subscribe input:focus{
  outline:0;
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(24,214,236,.16);
}
.footer-bottom{
  border-top:1px solid rgba(138,179,205,.11);
  padding:22px 0;
  display:flex;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  color:var(--text-dim);
  font-size:13px;
}
.footer-bottom span{display:inline-flex;align-items:center;gap:7px}
.footer-line-arrow{
  color:var(--cyan);
  opacity:.6;
}
@media (max-width:1080px){
  .article-lead-inner{grid-template-columns:1fr;align-items:start}
  .article-cover-card{transform:none}
  .article-cover-card img{height:190px}
  .article-grid{grid-template-columns:minmax(0,1fr) 300px;gap:26px}
  .related-grid{grid-template-columns:repeat(2,1fr);gap:16px}
}
@media (max-width:1023px){
  .header-row{gap:12px}
  .nav-toggle{
    display:flex;
  }
  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:14px;
    right:14px;
    z-index:99;
    opacity:0;
    pointer-events:none;
    transform:translateY(-12px);
    transition:opacity .28s,transform .28s;
    background:rgba(7,16,25,.95);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    border:1px solid rgba(138,179,205,.2);
    border-radius:18px;
    padding:20px 18px;
    box-shadow:0 30px 70px rgba(0,5,12,.5);
  }
  .site-nav.nav-open{
    opacity:1;
    pointer-events:auto;
    transform:translateY(0);
  }
  .site-nav ul{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  .site-nav a{
    padding:13px 15px;
    font-size:16px;
  }
  .site-nav li.active a::after{display:none}
  .site-nav .nav-cta{
    margin-left:0;
    margin-top:8px;
  }
  .site-nav .nav-cta .btn{
    width:100%;
    min-height:46px;
  }
}
@media (max-width:900px){
  .article-grid{grid-template-columns:1fr}
  .article-aside{
    position:static;
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:16px;
  }
  .aside-sub-box{grid-column:span 2}
  .article-direct{grid-template-columns:1fr}
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:34px;
  }
  .footer-brand{grid-column:span 2}
}
@media (max-width:767px){
  .container{width:min(100% - 32px,1260px)}
  .brand-main{font-size:19px}
  .site-header.is-scrolled .brand-main{font-size:18px}
  .article-lead{padding:64px 0 26px}
  .article-title{font-size:28px}
  .breadcrumb .crumb-current{max-width:200px}
  .article-body{
    padding:21px 17px;
    font-size:15.5px;
    line-height:1.85;
  }
  .article-body table{display:block;overflow-x:auto}
  .article-body th,.article-body td{white-space:nowrap}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .article-body img{
    border-radius:12px;
  }
  .related-grid{grid-template-columns:1fr}
  .footer-cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px}
  .cta-buttons{width:100%}
  .cta-buttons .btn{flex:1;min-width:140px}
  .footer-grid{grid-template-columns:1fr;padding-top:42px}
  .footer-brand{grid-column:span 1}
  .footer-col h4{margin-bottom:12px}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center}
  .article-aside{grid-template-columns:1fr}
  .aside-sub-box{grid-column:auto}
  .article-toolbar{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .brand-sub{letter-spacing:.22em}
  .related-card{min-height:0}
  .related-card .rel-thumb{height:150px}
}

/* roulang page: category1 */
:root {
    --bg: #060D17;
    --bg2: #0B1620;
    --card: rgba(19, 36, 52, .66);
    --card-strong: rgba(22, 44, 62, .82);
    --line: rgba(138, 179, 205, .28);
    --line-bright: rgba(120, 220, 240, .55);
    --cyan: #18D6EC;
    --cyan-soft: #8DE8F5;
    --amber: #FF9E3D;
    --amber-soft: #FFD3A1;
    --txt: #E9F2FA;
    --muted: #92AABF;
    --dim: #5C7184;
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --shadow: 0 8px 24px rgba(0, 10, 20, .3);
    --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
    --font-num: "Roboto Condensed", "DIN Alternate", "Bahnschrift", Arial, sans-serif;
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg);
    color: var(--txt);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  section[id],
  div[id] {
    scroll-margin-top: 76px;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  img {
    max-width: 100%;
    display: block;
  }

  ul,
  ol {
    list-style: none;
  }

  button,
  input {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    border: none;
    background: none;
  }

  .container {
    width: min(1200px, calc(100% - 44px));
    margin-right: auto;
    margin-left: auto;
  }

  .brand {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    flex-shrink: 0;
  }

  .brand-main {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    letter-spacing: .02em;
    white-space: nowrap;
  }

  .brand-main span {
    color: var(--cyan);
  }

  .brand-sub {
    margin-top: 3px;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: .34em;
    color: #6F8DA1;
  }

  .site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 200;
    background: rgba(6, 13, 23, .86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(138, 179, 205, .16);
    transition: background .3s ease, box-shadow .3s ease;
  }

  .site-header.scrolled {
    background: rgba(5, 11, 18, .94);
    box-shadow: 0 8px 26px rgba(0, 8, 16, .32);
  }

  .header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 68px;
    gap: 24px;
  }

  .site-nav {
    display: flex;
    align-items: center;
  }

  .site-nav ul {
    display: flex;
    align-items: center;
    gap: 26px;
  }

  .site-nav > ul > li {
    position: relative;
  }

  .site-nav > ul > li > a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 0 2px;
    font-size: 15px;
    color: #AFC3D2;
    transition: color .2s ease;
  }

  .site-nav > ul > li > a:after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--cyan);
    border-radius: 4px;
    box-shadow: 0 0 12px rgba(24, 214, 236, .8);
    transform: translateX(-50%);
    transition: width .25s ease;
  }

  .site-nav > ul > li > a:hover {
    color: #fff;
  }

  .site-nav > ul > li > a:hover:after {
    width: 100%;
  }

  .site-nav > ul > li.active > a {
    color: #fff;
    font-weight: 600;
  }

  .site-nav > ul > li.active > a:after {
    width: 100%;
  }

  .site-nav > ul > li.active > a:before {
    content: "";
    position: absolute;
    inset: 4px -10px 2px -10px;
    background: rgba(24, 214, 236, .08);
    border-radius: 14px;
    pointer-events: none;
  }

  .site-nav .nav-cta {
    margin-left: 8px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
    white-space: nowrap;
  }

  .btn-cyan,
  .btn-primary {
    background: linear-gradient(135deg, #12CFE9, #14A6D6);
    color: #001820;
    box-shadow: 0 0 0 1px rgba(24, 214, 236, .25), 0 8px 22px rgba(24, 214, 236, .22);
  }

  .btn-cyan:hover,
  .btn-primary:hover {
    background: linear-gradient(135deg, #42E6F6, #22B8E0);
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(24, 214, 236, .4), 0 14px 30px rgba(24, 214, 236, .32);
  }

  .btn-ghost {
    background: rgba(19, 36, 52, .34);
    border: 1px solid rgba(138, 179, 205, .45);
    color: var(--txt);
  }

  .btn-ghost:hover {
    border-color: var(--cyan);
    color: var(--cyan-soft);
    transform: translateY(-2px);
    background: rgba(24, 214, 236, .08);
  }

  .btn-amber {
    background: linear-gradient(135deg, #FFBC68, #FF933E);
    color: #221202;
    box-shadow: 0 0 0 1px rgba(255, 158, 61, .25), 0 6px 18px rgba(255, 158, 61, .22);
  }

  .btn-amber:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(255, 180, 100, .4), 0 12px 26px rgba(255, 158, 61, .35);
    background: linear-gradient(135deg, #FFD297, #FFA95D);
  }

  .nav-toggle {
    display: none;
    position: relative;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    cursor: pointer;
    z-index: 15;
  }

  .burger-line,
  .burger-line:before,
  .burger-line:after {
    content: "";
    position: absolute;
    left: 10px;
    width: 24px;
    height: 2px;
    border-radius: 4px;
    background: #d9e9f5;
    transition: transform .25s ease, opacity .25s ease, top .25s ease;
  }

  .burger-line {
    top: 21px;
  }

  .burger-line:before {
    top: -6px;
  }

  .burger-line:after {
    top: 6px;
  }

  body.menu-open .burger-line {
    background: transparent;
  }

  body.menu-open .burger-line:before {
    top: 0;
    transform: rotate(45deg);
  }

  body.menu-open .burger-line:after {
    top: 0;
    transform: rotate(-45deg);
  }

  .cat-hero {
    position: relative;
    min-height: 660px;
    display: flex;
    align-items: center;
    padding: 150px 0 76px;
    background-size: cover;
    background-position: center 22%;
    overflow: hidden;
  }

  .cat-hero:before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(5, 11, 18, .97) 0%, rgba(5, 11, 18, .9) 34%, rgba(5, 11, 18, .62) 68%, rgba(6, 13, 23, .42) 100%);
  }

  .cat-hero:after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(121, 197, 219, .17) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: .4;
    pointer-events: none;
  }

  .cat-hero-inner {
    position: relative;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 64px;
  }

  .cat-hero-copy {
    flex: 1.25;
    max-width: 760px;
  }

  .hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 22px;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .04em;
    border: 1px solid var(--line);
    background: rgba(16, 30, 44, .55);
    color: #d7e6f0;
  }

  .tag-cyan {
    color: var(--cyan-soft);
    border-color: rgba(24, 214, 236, .32);
    background: rgba(24, 214, 236, .1);
  }

  .tag-amber {
    color: var(--amber-soft);
    border-color: rgba(255, 158, 61, .36);
    background: rgba(255, 158, 61, .12);
  }

  .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 8px var(--cyan);
  }

  .cat-hero-title {
    line-height: 1.12;
    margin: 0 0 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .hero-sitename {
    font-size: clamp(17px, 2vw, 22px);
    font-weight: 600;
    letter-spacing: .14em;
    color: #b7d9e9;
  }

  .hero-catname {
    font-size: clamp(38px, 5.1vw, 62px);
    font-weight: 800;
    color: var(--txt);
    text-shadow: 0 0 30px rgba(24, 214, 236, .28);
    letter-spacing: .03em;
  }

  .cat-hero-lead {
    max-width: 37em;
    margin-bottom: 30px;
    color: #C3D8E6;
    font-size: 17px;
    line-height: 1.85;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
  }

  .cat-hero-panel {
    flex: 0 0 320px;
    position: relative;
    z-index: 3;
  }

  .panel-card {
    background: rgba(19, 36, 52, .72);
    border: 1px solid rgba(138, 179, 205, .26);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 28px 26px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
  }

  .panel-card:before {
    content: "";
    position: absolute;
    width: 160px;
    height: 160px;
    right: -64px;
    top: -68px;
    background: radial-gradient(circle, rgba(24, 214, 236, .22), transparent 65%);
    pointer-events: none;
  }

  .panel-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 4px;
  }

  .panel-title span {
    font-size: 10px;
    letter-spacing: .28em;
    color: var(--dim);
    font-weight: 500;
  }

  .stat-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 20px 0 14px;
  }

  .stat-list li {
    text-align: center;
    border: 1px solid rgba(138, 179, 205, .18);
    border-radius: 14px;
    background: rgba(4, 10, 18, .18);
    padding: 16px 8px 12px;
  }

  .stat-list strong {
    display: block;
    font-family: var(--font-num);
    font-size: 26px;
    line-height: 1;
    color: #E9F6FB;
    letter-spacing: .02em;
  }

  .stat-list strong sup {
    font-size: 13px;
    color: var(--cyan);
    margin-left: 2px;
  }

  .stat-list span {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: var(--muted);
    line-height: 1.4;
  }

  .panel-note {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: #cae2ef;
    font-size: 12px;
    line-height: 1.55;
    border-top: 1px dashed rgba(138, 179, 205, .25);
    padding-top: 14px;
  }

  .icon-pulse {
    flex: 0 0 auto;
    width: 7px;
    height: 7px;
    margin-top: 6px;
    border-radius: 50%;
    background: var(--amber);
    box-shadow: 0 0 0 4px rgba(255, 158, 61, .12), 0 0 14px rgba(255, 158, 61, .7);
  }

  .section {
    position: relative;
    padding: 88px 0;
  }

  .section + .section {
    border-top: 1px solid rgba(138, 179, 205, .12);
  }

  .section-soft {
    background: linear-gradient(180deg, rgba(8, 18, 30, .75), rgba(9, 22, 34, .42));
  }

  .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 38px;
  }

  .section-kicker {
    font-size: 13px;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: .2em;
  }

  .section-title {
    margin-top: 6px;
    font-size: clamp(25px, 3vw, 36px);
    line-height: 1.3;
    letter-spacing: .02em;
  }

  .section-title em {
    color: var(--cyan);
    font-style: normal;
  }

  .section-more,
  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    font-size: 14px;
    white-space: nowrap;
    transition: color .2s ease, gap .2s ease;
  }

  .section-more:hover,
  .text-link:hover {
    color: var(--cyan-soft);
    gap: 11px;
  }

  .scope-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .scope-card {
    position: relative;
    background: var(--card);
    border: 1px solid rgba(138, 179, 205, .22);
    border-radius: var(--radius-md);
    padding: 26px 22px 24px;
    overflow: hidden;
    min-height: 215px;
    transition: transform .25s ease, border-color .25s ease, background .25s ease;
  }

  .scope-card:nth-child(1) {
    border-top: 2px solid #18D6EC;
  }

  .scope-card:nth-child(2) {
    border-top: 2px solid #7AC7E3;
  }

  .scope-card:nth-child(3) {
    border-top: 2px solid #FF9E3D;
  }

  .scope-card:nth-child(4) {
    border-top: 2px solid #55D8B6;
  }

  .scope-card:before {
    content: "";
    position: absolute;
    width: 120px;
    height: 120px;
    right: -52px;
    top: -58px;
    background: radial-gradient(circle, rgba(24, 214, 236, .12), transparent 68%);
    transition: opacity .25s;
    opacity: .5;
    pointer-events: none;
  }

  .scope-card:hover {
    transform: translateY(-6px);
    border-color: rgba(24, 214, 236, .42);
    background: rgba(22, 44, 62, .78);
    box-shadow: 0 18px 28px rgba(0, 12, 22, .32);
  }

  .scope-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(24, 214, 236, .12);
    border: 1px solid rgba(24, 214, 236, .2);
    color: var(--cyan);
    margin-bottom: 20px;
  }

  .scope-card h3 {
    font-size: 18px;
    letter-spacing: .04em;
    margin-bottom: 8px;
  }

  .scope-card p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.7;
  }

  .go-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 18px;
    color: #cfdce7;
    font-size: 12px;
    font-weight: 600;
    transition: color .2s ease;
  }

  .go-link b {
    transition: transform .2s ease;
    color: var(--cyan);
  }

  .go-link:hover {
    color: var(--cyan);
  }

  .go-link:hover b {
    transform: translateX(4px);
  }

  .edit-block {
    background: linear-gradient(135deg, rgba(12, 28, 43, .95), rgba(9, 20, 31, .92));
    border: 1px solid rgba(138, 179, 205, .18);
    border-radius: 26px;
    padding: 38px;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 40px;
    align-items: center;
    position: relative;
    overflow: hidden;
  }

  .edit-block:after {
    content: "";
    position: absolute;
    left: 0;
    top: 24px;
    bottom: 24px;
    width: 3px;
    background: linear-gradient(180deg, var(--cyan), transparent 90%);
    border-radius: 0 4px 4px 0;
    box-shadow: 0 0 16px rgba(24, 214, 236, .45);
  }

  .edit-copy .section-title {
    font-size: 28px;
  }

  .assure-list {
    margin-top: 22px;
    display: grid;
    gap: 14px;
  }

  .assure-list li {
    position: relative;
    padding-left: 32px;
    color: #d2e0eb;
    line-height: 1.7;
  }

  .assure-list li:before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 8px var(--cyan);
  }

  .edit-side-card {
    background: rgba(19, 36, 52, .55);
    border: 1px solid rgba(138, 179, 205, .22);
    border-radius: 20px;
    padding: 26px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  .edit-side-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
  }

  .edit-side-card p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
  }

  .track-mark {
    display: flex;
    gap: 8px;
    margin-top: 22px;
    flex-wrap: wrap;
  }

  .track-mark span {
    font-size: 12px;
    color: var(--amber-soft);
    background: rgba(255, 158, 61, .1);
    padding: 6px 12px;
    border-radius: 99px;
    border: 1px solid rgba(255, 158, 61, .3);
  }

  .feature-split {
    display: grid;
    grid-template-columns: 1.08fr .92fr;
    gap: 22px;
    align-items: stretch;
  }

  .feature-card-main {
    position: relative;
    min-height: 430px;
    border-radius: 22px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    background: #0A1520;
    border: 1px solid rgba(138, 179, 205, .2);
  }

  .feature-card-main img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .45s ease;
  }

  .feature-card-main:hover img {
    transform: scale(1.05);
  }

  .feature-card-main .photo-mask {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(6, 13, 23, .08) 0%, rgba(6, 13, 23, .95) 100%);
  }

  .feature-caption {
    position: relative;
    z-index: 2;
    padding: 28px 30px;
  }

  .feature-caption .tag {
    margin-bottom: 14px;
  }

  .feature-caption h3 {
    font-size: clamp(21px, 2.4vw, 30px);
    line-height: 1.35;
    margin-bottom: 10px;
  }

  .feature-caption p {
    color: #cbdbe6;
    font-size: 14px;
    max-width: 25em;
  }

  .feature-side {
    display: grid;
    gap: 18px;
  }

  .feature-row {
    background: var(--card);
    border: 1px solid rgba(138, 179, 205, .2);
    border-radius: 16px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 124px 1fr;
    min-height: 132px;
    transition: transform .22s ease, border-color .22s ease;
  }

  .feature-row:hover {
    transform: translateY(-4px);
    border-color: rgba(24, 214, 236, .42);
  }

  .feature-row .ph {
    height: 100%;
    min-height: 132px;
    overflow: hidden;
  }

  .feature-row .ph img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
  }

  .feature-row:hover .ph img {
    transform: scale(1.06);
  }

  .feature-row .fd {
    padding: 17px 18px;
  }

  .feature-row .mini-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--dim);
    margin-bottom: 8px;
  }

  .feature-row .mini-meta .tag {
    padding: 3px 9px;
    font-size: 11px;
  }

  .feature-row h3 {
    font-size: 16px;
    line-height: 1.5;
    font-weight: 700;
    margin: 0;
  }

  .brief-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 12px;
    color: var(--cyan);
    font-size: 13px;
  }

  .brief-row .read-more {
    font-weight: 600;
    font-size: 14px;
  }

  .process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-top: 34px;
  }

  .process-item {
    background: rgba(12, 27, 41, .86);
    border: 1px solid rgba(138, 179, 205, .2);
    border-radius: 18px;
    padding: 28px 26px;
    position: relative;
    transition: transform .22s ease, border-color .22s ease;
  }

  .process-item:hover {
    transform: translateY(-5px);
    border-color: rgba(24, 214, 236, .4);
  }

  .process-num {
    font-family: var(--font-num);
    font-size: 15px;
    color: var(--cyan);
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(24, 214, 236, .45);
    border-radius: 50%;
    margin-bottom: 20px;
    box-shadow: 0 0 18px rgba(24, 214, 236, .18);
  }

  .process-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #fff;
  }

  .process-item p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.75;
    margin: 0;
  }

  .cross-block {
    display: grid;
    gap: 16px;
  }

  .cross-row {
    display: grid;
    grid-template-columns: 120px 1fr auto;
    gap: 18px;
    align-items: center;
    padding: 20px 24px;
    background: var(--card);
    border: 1px solid rgba(138, 179, 205, .2);
    border-radius: 16px;
    transition: background .2s ease, transform .2s ease, border-color .2s ease;
  }

  .cross-row:hover {
    background: rgba(26, 48, 67, .86);
    border-color: rgba(24, 214, 236, .38);
    transform: translateX(5px);
  }

  .cross-icon {
    width: 44px;
    height: 44px;
    border-radius: 13px;
    background: rgba(24, 214, 236, .12);
    border: 1px solid rgba(24, 214, 236, .26);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan);
    font-size: 19px;
  }

  .cross-icon.orange {
    background: rgba(255, 158, 61, .12);
    border-color: rgba(255, 158, 61, .26);
    color: var(--amber);
  }

  .cross-title {
    font-size: 18px;
    color: #fff;
    margin-bottom: 3px;
  }

  .cross-desc {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.6;
  }

  .cross-link-arrow {
    color: var(--cyan);
    font-size: 20px;
    font-weight: 600;
    transition: transform .2s ease;
  }

  .cross-row:hover .cross-link-arrow {
    transform: translateX(5px);
  }

  .cta-wrap {
    padding: 26px 0 0;
  }

  .cta-band {
    position: relative;
    padding: 66px 36px;
    border: 1px solid rgba(138, 179, 205, .25);
    border-radius: 28px;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(9, 24, 38, .96), rgba(13, 36, 54, .86));
  }

  .cta-band:before {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    left: -120px;
    top: -190px;
    background: radial-gradient(circle, rgba(24, 214, 236, .26), transparent 65%);
  }

  .cta-band:after {
    content: "";
    position: absolute;
    width: 300px;
    height: 300px;
    right: -90px;
    bottom: -150px;
    background: radial-gradient(circle, rgba(255, 158, 61, .2), transparent 65%);
  }

  .cta-band > * {
    position: relative;
    z-index: 3;
  }

  .cta-band h2 {
    font-size: clamp(24px, 3vw, 36px);
    letter-spacing: .04em;
    margin-bottom: 12px;
  }

  .cta-band p {
    color: var(--muted);
    max-width: 560px;
    margin: 0 auto 24px;
  }

  .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
  }

  .faq-section {
    background: linear-gradient(180deg, rgba(6, 13, 23, .2), rgba(11, 22, 32, .4));
  }

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--card);
    border: 1px solid rgba(138, 179, 205, .2);
    border-radius: 16px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color .22s ease, background .22s ease;
  }

  .faq-item.open {
    border-color: rgba(24, 214, 236, .4);
    background: rgba(19, 38, 53, .75);
  }

  .faq-q {
    width: 100%;
    min-height: 62px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 0 24px;
    cursor: pointer;
    text-align: left;
    font-size: 16px;
    color: #e6eff5;
    font-weight: 600;
  }

  .faq-mark {
    position: relative;
    flex: 0 0 30px;
    height: 30px;
    border-radius: 50%;
    border: 1px solid rgba(24, 214, 236, .5);
    background: rgba(24, 214, 236, .1);
  }

  .faq-mark:before,
  .faq-mark:after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 13px;
    height: 2px;
    background: var(--cyan);
    border-radius: 4px;
    transform: translate(-50%, -50%);
    transition: transform .25s ease;
  }

  .faq-mark:after {
    transform: translate(-50%, -50%) rotate(90deg);
  }

  .faq-item.open .faq-mark:after {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    color: var(--muted);
    line-height: 1.8;
  }

  .faq-item.open .faq-a {
    max-height: 500px;
    padding: 0 24px 24px;
  }

  .toast-tip {
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translate(-50%, 20px);
    z-index: 400;
    background: rgba(10, 26, 38, .96);
    border: 1px solid rgba(24, 214, 236, .45);
    color: var(--txt);
    padding: 12px 20px;
    border-radius: 999px;
    box-shadow: 0 12px 30px rgba(0, 10, 20, .45), 0 0 20px rgba(24, 214, 236, .12);
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease, transform .25s ease;
    white-space: nowrap;
  }

  .toast-tip.show {
    opacity: 1;
    transform: translate(-50%, 0);
  }

  .footer {
    position: relative;
    background: #040A12;
    border-top: 1px solid rgba(138, 179, 205, .14);
    margin-top: 90px;
    padding: 66px 0 26px;
  }

  .footer:before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(24, 214, 236, .45), rgba(255, 158, 61, .35), transparent);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.55fr .8fr .9fr 1.25fr;
    gap: 42px;
    align-items: start;
  }

  .footer .brand-main {
    font-size: 19px;
  }

  .footer-desc {
    margin-top: 14px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
    max-width: 30em;
  }

  .footer-col h4 {
    color: #d7e5ee;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
  }

  .footer-col ul {
    display: grid;
    gap: 10px;
  }

  .footer-col ul a {
    display: inline-block;
    color: var(--muted);
    font-size: 14px;
    transition: color .2s ease, padding-left .2s ease;
  }

  .footer-col ul a:hover {
    color: var(--cyan);
    padding-left: 5px;
  }

  .footer-subscribe small {
    display: block;
    margin-bottom: 12px;
    color: var(--dim);
    font-size: 13px;
  }

  .footer-subscribe input {
    width: 100%;
    height: 42px;
    border-radius: 99px;
    background: rgba(15, 31, 44, .92);
    border: 1px solid rgba(138, 179, 205, .26);
    padding: 0 16px;
    color: #e8f1f6;
    font-size: 14px;
    margin-bottom: 10px;
    transition: border-color .2s ease, box-shadow .2s ease;
  }

  .footer-subscribe input:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(24, 214, 236, .15);
  }

  .footer-subscribe input::placeholder {
    color: #57707d;
  }

  .footer-feedback {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: var(--cyan-soft);
    line-height: 1.4;
  }

  .footer-feedback.error {
    color: var(--amber);
  }

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
    border-top: 1px solid rgba(138, 179, 205, .14);
    margin-top: 48px;
    padding-top: 20px;
    color: #607889;
    font-size: 13px;
  }

  .footer-line-arrow {
    color: var(--cyan);
    margin-left: 6px;
  }

  .footer-col ul li a.btn {
    min-height: auto;
    padding: 0;
    color: var(--muted);
    font-weight: 400;
    background: transparent;
    box-shadow: none;
    text-shadow: none;
  }

  @media (max-width: 1080px) {
    .header-row {
      gap: 18px;
    }

    .site-nav ul {
      gap: 20px;
    }

    .cat-hero-inner {
      gap: 36px;
    }

    .cat-hero-panel {
      flex-basis: 280px;
    }

    .scope-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .feature-split {
      grid-template-columns: 1fr;
    }

    .feature-card-main {
      min-height: 370px;
    }

    .edit-block {
      grid-template-columns: 1fr;
      gap: 24px;
    }

    .footer-grid {
      grid-template-columns: 1.2fr 1fr 1fr;
    }

    .footer-subscribe {
      grid-column: span 3;
      max-width: 440px;
    }
  }

  @media (max-width: 860px) {
    .site-nav {
      position: fixed;
      inset: 0 0 0 auto;
      width: min(80vw, 380px);
      height: 100vh;
      background: rgba(6, 14, 24, .96);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      transform: translateX(105%);
      transition: transform .32s ease;
      padding: 108px 30px 30px;
      box-shadow: -20px 0 60px rgba(0, 8, 16, .45);
      align-items: flex-start;
      overflow-y: auto;
    }

    .site-nav ul {
      flex-direction: column;
      align-items: stretch;
      gap: 4px;
    }

    .site-nav > ul > li > a {
      width: 100%;
      font-size: 18px;
      padding: 14px 12px;
      border-radius: 12px;
      min-height: 52px;
    }

    .site-nav > ul > li > a:after,
    .site-nav > ul > li.active > a:before {
      content: none;
    }

    .site-nav > ul > li.active > a {
      background: rgba(24, 214, 236, .12);
      color: var(--cyan-soft);
    }

    .site-nav .nav-cta {
      margin-top: 18px;
    }

    .site-nav .nav-cta .btn {
      width: 100%;
    }

    body.menu-open .site-nav {
      transform: translateX(0);
    }

    .nav-toggle {
      display: flex;
    }

    .cat-hero {
      padding: 130px 0 60px;
      min-height: auto;
    }

    .cat-hero-inner {
      flex-direction: column;
      align-items: flex-start;
    }

    .cat-hero-copy {
      max-width: 100%;
    }

    .cat-hero-panel {
      width: 100%;
      flex: 1 1 auto;
    }

    .process-grid {
      grid-template-columns: 1fr;
    }

    .cross-row {
      grid-template-columns: 1fr;
      text-align: left;
      padding: 20px;
    }

    .cross-icon {
      width: 38px;
      height: 38px;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 720px) {
    .section {
      padding: 60px 0;
    }

    .hero-actions .btn {
      width: 100%;
    }

    .section-head {
      flex-direction: column;
      align-items: flex-start;
    }

    .feature-row {
      grid-template-columns: 114px 1fr;
    }

    .edit-block {
      padding: 28px 20px;
    }

    .scope-grid {
      grid-template-columns: 1fr;
    }

    .cta-band {
      padding: 46px 20px;
    }

    .cta-buttons .btn {
      width: 100%;
    }
  }

  @media (max-width: 540px) {
    .container {
      width: calc(100% - 30px);
    }

    .brand-sub {
      letter-spacing: .22em;
    }

    .cat-hero-lead {
      font-size: 15px;
    }

    .stat-list {
      grid-template-columns: 1fr 1fr 1fr;
      gap: 6px;
    }

    .stat-list li {
      padding: 12px 4px 10px;
    }

    .stat-list strong {
      font-size: 21px;
    }

    .feature-split {
      gap: 18px;
    }

    .feature-card-main {
      min-height: 350px;
    }

    .feature-row {
      grid-template-columns: 98px 1fr;
    }

    .feature-row .ph {
      min-height: 128px;
    }

    .feature-row .fd {
      padding: 13px 14px;
    }

    .feature-row h3 {
      font-size: 15px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 30px;
    }

    .footer-subscribe {
      grid-column: auto;
      max-width: 100%;
    }

    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }

    .faq-q {
      font-size: 15px;
      padding: 0 18px;
    }

    .faq-item.open .faq-a {
      padding: 0 18px 20px;
    }
  }

  @media (max-width: 400px) {
    .feature-row {
      grid-template-columns: 1fr;
    }

    .feature-row .ph {
      height: 150px;
      min-height: 0;
    }
  }

/* roulang page: category2 */
:root {
  --bg1:#060D17;
  --bg2:#0B1620;
  --panel:rgba(19,36,52,.66);
  --panel-solid:#12242f;
  --stroke:rgba(138,179,205,.28);
  --cyan:#18D6EC;
  --cyan-deep:#0fa9bd;
  --orange:#FF9E3D;
  --text:#E9F2FA;
  --muted:#92AABF;
  --muted2:#5C7184;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-pill:999px;
  --shadow:0 8px 24px rgba(0,10,20,.3);
  --glow:0 0 0 1px rgba(24,214,236,.18), 0 10px 34px rgba(24,214,236,.18);
  --tr:.28s cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  background-color:var(--bg1);
  background-image:radial-gradient(rgba(130,190,215,.06) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    linear-gradient(115deg,rgba(24,214,236,.045) 0%,transparent 35%),
    linear-gradient(300deg,rgba(255,158,61,.03) 0%,transparent 28%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:var(--tr)}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit}
ul{list-style:none}
.container{max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:2}
.section{padding:88px 0;position:relative;z-index:1}
.section-alt{background:linear-gradient(180deg,rgba(10,20,29,.15) 0%,var(--bg2) 100%);border-top:1px solid rgba(138,179,205,.12)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.26em;
  color:var(--cyan);font-weight:600;text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.section-head{margin-bottom:44px;max-width:760px}
.section-head h2{
  font-size:clamp(26px,3.4vw,36px);line-height:1.3;margin:12px 0 12px;font-weight:700;
  letter-spacing:.02em;
}
.section-head p{color:var(--muted);font-size:16px;line-height:1.8}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-pill);font-weight:600;line-height:1.2;min-height:46px;
  padding:0 26px;font-size:15px;transition:var(--tr);white-space:nowrap;border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(135deg,#23E1F2 0%,#0ca7c2 100%);color:#031018;
  box-shadow:0 0 22px rgba(24,214,236,.28),0 6px 16px rgba(0,0,0,.2);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(24,214,236,.42),0 10px 24px rgba(0,0,0,.24);color:#031018}
.btn-ghost{background:rgba(19,36,52,.5);border-color:rgba(138,179,205,.5);color:var(--text);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 18px rgba(24,214,236,.17)}
.btn-amber{background:linear-gradient(135deg,#FFB45E,#FF8E2B);color:#1b0d00;box-shadow:0 0 18px rgba(255,158,61,.28)}
.btn-amber:hover{transform:translateY(-2px);box-shadow:0 0 30px rgba(255,158,61,.4)}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.tag{
  display:inline-flex;align-items:center;gap:8px;background:rgba(24,214,236,.1);
  border:1px solid rgba(24,214,236,.3);color:var(--cyan);font-size:12px;
  padding:4px 12px;border-radius:var(--radius-pill);letter-spacing:.04em;
}
.tag-amber{background:rgba(255,158,61,.1);border-color:rgba(255,158,61,.32);color:var(--orange)}
.tag::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.tag-amber::before{background:var(--orange);box-shadow:0 0 8px var(--orange)}
.glass-card{
  background:var(--panel);border:1px solid var(--stroke);border-radius:var(--radius-lg);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}

/* Header */
.site-header{
  position:sticky;top:0;z-index:99;height:68px;
  border-bottom:1px solid rgba(138,179,205,.14);
  background:rgba(6,13,23,.76);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  transition:background .3s ease,box-shadow .3s ease;
}
.site-header.scrolled{background:rgba(4,10,18,.92);box-shadow:0 8px 28px rgba(0,0,0,.36)}
.header-row{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;flex-direction:column;line-height:1.15;flex-shrink:0}
.brand-main{font-size:22px;font-weight:800;letter-spacing:.05em;color:var(--text)}
.brand-main span{color:var(--cyan)}
.brand-sub{font-size:9px;letter-spacing:.38em;color:var(--muted2);margin-top:2px;text-transform:uppercase}
.site-nav ul{display:flex;align-items:center;gap:6px}
.site-nav li a{
  position:relative;display:flex;align-items:center;min-height:40px;padding:0 14px;
  color:var(--muted);font-size:15px;font-weight:500;border-radius:var(--radius-pill);
}
.site-nav li a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:0;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(24,214,236,.9);
  opacity:0;transition:all .24s ease;transform:scaleX(.4);
}
.site-nav li a:hover{color:var(--text)}
.site-nav li.active a{color:var(--cyan)}
.site-nav li.active a::after{opacity:1;transform:scaleX(1)}
.nav-cta{margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--stroke);border-radius:12px;background:rgba(19,36,52,.4);flex-direction:column;gap:5px;
}
.burger-line{width:18px;height:2px;background:var(--text);border-radius:20px;transition:var(--tr)}
.nav-toggle.open .burger-line:nth-child(1){transform:translateY(4px) rotate(45deg)}
.nav-toggle.open .burger-line:nth-child(2){transform:translateY(-3px) rotate(-45deg)}

/* Hero */
.topic-hero{
  position:relative;padding:88px 0 56px;overflow:hidden;isolation:isolate;
  background:
    linear-gradient(105deg, rgba(6,13,23,.94) 22%, rgba(7,18,28,.72) 54%, rgba(8,25,35,.6) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.topic-hero .hero-inner{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:56px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  border:1px solid rgba(24,214,236,.34);background:rgba(24,214,236,.08);
  border-radius:var(--radius-pill);padding:6px 16px;font-size:12px;letter-spacing:.2em;color:var(--cyan);
  text-transform:uppercase;margin-bottom:26px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.topic-hero h1{
  font-size:clamp(46px,6vw,84px);font-weight:800;line-height:1.08;letter-spacing:.02em;
  margin-bottom:24px;
}
.topic-hero h1 span{
  display:block;font-size:clamp(17px,2vw,22px);font-weight:500;color:var(--muted);line-height:1.8;margin-top:14px;
  letter-spacing:.03em;
}
.hero-lead{color:var(--muted);font-size:17px;line-height:1.85;max-width:620px}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-note{margin-top:24px;color:var(--muted2);font-size:13px;display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-panel{position:relative;padding:16px;overflow:hidden}
.hero-panel::before{
  content:"";position:absolute;inset:0;background:
   linear-gradient(155deg,rgba(24,214,236,.12),transparent 42%),
   repeating-linear-gradient(45deg,rgba(255,255,255,.02) 0 1px,transparent 1px 8px);
}
.hero-panel .panel-media{border-radius:14px;overflow:hidden;position:relative}
.hero-panel .panel-media img{width:100%;height:220px;object-fit:cover}
.hero-panel .panel-corner{
  position:absolute;left:22px;top:22px;z-index:3;
  background:rgba(6,13,23,.82);border:1px solid rgba(138,179,205,.28);
  color:var(--text);font-size:12px;padding:5px 13px;border-radius:999px;backdrop-filter:blur(8px);
}
.hero-panel h3{font-size:20px;margin:10px 0 2px;letter-spacing:.02em}
.hero-panel p{color:var(--muted);font-size:14px;line-height:1.8}
.hero-panel .mini-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted2);margin-top:10px}
.hero-panel .mini-meta b{color:var(--cyan);font-weight:600}
.hero-stats{
  margin-top:68px;border-radius:var(--radius-lg);display:grid;grid-template-columns:repeat(4,1fr);
}
.hero-stats .stat{
  padding:22px 26px;text-align:center;border-left:1px solid rgba(138,179,205,.15);
}
.hero-stats .stat:first-child{border-left:none;padding-left:0;text-align:left}
.hero-stats .num{
  font-family:"DIN Alternate","Bahnschrift","Arial Narrow",sans-serif;
  font-size:32px;font-weight:700;color:var(--cyan);letter-spacing:.02em;line-height:1.1;
}
.hero-stats .label{color:var(--muted);font-size:13px;margin-top:3px}
.hero-stats .stat-orange .num{color:var(--orange)}

/* Section Catalog */
.topic-catalog{background:rgba(8,18,28,.5)}
.catalog-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:26px;align-items:stretch}
.catalog-lead{
  position:relative;overflow:hidden;border-radius:22px;min-height:520px;
  display:flex;flex-direction:column;justify-content:flex-end;
  background:linear-gradient(to top,#041019 0%,rgba(4,16,26,.35) 50%,rgba(4,16,26,.08) 100%);
}
.catalog-lead .lead-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-1}
.catalog-lead .lead-cover{padding:34px;position:relative}
.catalog-lead h3{font-size:27px;font-weight:700;margin:12px 0 8px}
.catalog-lead p{color:#C2D4E3;max-width:520px;font-size:15px}
.catalog-list{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.catalog-item{
  background:var(--panel);border:1px solid var(--stroke);border-radius:18px;padding:28px 24px;
  transition:all .3s ease;position:relative;overflow:hidden;display:flex;flex-direction:column;
}
.catalog-item::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--cyan),transparent);opacity:.7;
}
.catalog-item:nth-child(even)::after{background:linear-gradient(180deg,var(--orange),transparent);opacity:.7}
.catalog-item:hover{transform:translateY(-6px);border-color:rgba(24,214,236,.52);box-shadow:0 14px 40px rgba(0,12,22,.4),0 0 24px rgba(24,214,236,.08)}
.catalog-item .cate-no{
  font-family:"DIN Alternate","Arial Narrow",sans-serif;font-size:12px;letter-spacing:.2em;
  color:var(--muted2);margin-bottom:16px;
}
.catalog-item h4{font-size:19px;font-weight:700;margin-bottom:10px;line-height:1.45}
.catalog-item p{color:var(--muted);font-size:14px;line-height:1.8;flex:1}
.catalog-item .enter{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:14px;font-weight:600;margin-top:20px;height:22px}
.catalog-item .enter em{font-style:normal;transition:transform .25s ease;display:inline-block}
.catalog-item:hover .enter em{transform:translateX(6px)}

/* Topic Feature */
.feature-holder{
  background:radial-gradient(ellipse at 30% 0%, rgba(24,214,236,.11) 0%, transparent 46%),var(--panel);
  border:1px solid var(--stroke);border-radius:26px;padding:44px;overflow:hidden;position:relative;
}
.feature-holder::before{
  content:"FEATURED";position:absolute;right:-8px;top:24px;font-size:84px;font-weight:800;
  color:rgba(138,179,205,.04);letter-spacing:.1em;line-height:1;pointer-events:none;
  font-family:"DIN Alternate","Arial Narrow",sans-serif;
}
.feature-main{
  display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:stretch;
}
.feat-card{
  position:relative;border-radius:18px;overflow:hidden;min-height:320px;
  display:flex;align-items:flex-end;
  background:linear-gradient(to top,rgba(3,8,15,.95) 18%,rgba(4,11,19,.32) 60%,rgba(4,11,19,.1));
}
.feat-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-1;transition:transform .6s ease}
.feat-card:hover img{transform:scale(1.06)}
.feat-card:hover{box-shadow:0 14px 38px rgba(0,0,0,.3),0 0 26px rgba(24,214,236,.1)}
.feat-card .feat-copy{padding:26px;position:relative;width:100%}
.feat-card .feat-rank{
  position:absolute;right:20px;top:16px;font-family:"DIN Alternate","Arial Narrow",sans-serif;
  background:rgba(24,214,236,.88);color:#031018;font-size:13px;font-weight:700;
  border-radius:999px;padding:2px 12px;
}
.feat-card h3{font-size:23px;line-height:1.4;margin:10px 0 8px;font-weight:700}
.feat-card p{font-size:14px;color:#c3d5e4;line-height:1.85;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.feat-card .feat-link{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:14px;color:var(--cyan);font-weight:600}
.feature-side{display:flex;flex-direction:column;justify-content:space-between;gap:18px}
.mini-feature{
  background:rgba(255,255,255,.035);border:1px solid rgba(138,179,205,.18);border-radius:16px;
  padding:20px 22px;display:flex;gap:18px;align-items:center;transition:var(--tr);
}
.mini-feature:hover{background:rgba(24,214,236,.07);border-color:rgba(24,214,236,.45);transform:translateX(4px)}
.mini-feature .mf-num{
  font-family:"DIN Alternate","Arial Narrow",sans-serif;font-size:32px;font-weight:800;
  color:rgba(24,214,236,.25);line-height:1;min-width:44px;
}
.mini-feature:nth-child(2) .mf-num{color:rgba(255,158,61,.22)}
.mini-feature h4{font-size:18px;font-weight:700;line-height:1.4}
.mini-feature p{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.7}

/* Channel recommend */
.reco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.reco-card{
  display:flex;align-items:flex-start;gap:18px;padding:26px;
  background:rgba(19,36,52,.42);border:1px solid rgba(138,179,205,.16);
  border-radius:18px;transition:var(--tr);
}
.reco-card:hover{border-color:rgba(24,214,236,.42);background:rgba(24,214,236,.05);transform:translateY(-4px)}
.reco-icon{
  width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:rgba(24,214,236,.12);color:var(--cyan);font-size:21px;font-weight:800;flex-shrink:0;
}
.reco-card.c-orange .reco-icon{background:rgba(255,158,61,.12);color:var(--orange)}
.reco-card h3{font-size:17px;font-weight:700}
.reco-card p{color:var(--muted);font-size:13px;line-height:1.8;margin-top:5px}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{
  border:1px solid var(--stroke);border-radius:15px;background:rgba(19,36,52,.4);
  backdrop-filter:blur(8px);margin-bottom:14px;overflow:hidden;transition:border-color .3s;
}
.faq-item.active{border-color:rgba(24,214,236,.5);box-shadow:0 0 20px rgba(24,214,236,.06)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  text-align:left;padding:20px 24px;color:var(--text);font-size:16px;font-weight:600;line-height:1.5;
}
.faq-q .faq-icon{position:relative;width:28px;height:28px;min-width:28px;border-radius:8px;border:1px solid var(--stroke);transition:var(--tr)}
.faq-q .faq-icon::before,.faq-q .faq-icon::after{content:"";position:absolute;background:var(--cyan);border-radius:2px;top:50%;left:50%;transition:var(--tr)}
.faq-q .faq-icon::before{width:12px;height:2px;transform:translate(-50%,-50%)}
.faq-q .faq-icon::after{width:2px;height:12px;transform:translate(-50%,-50%)}
.faq-item.active .faq-icon{border-color:var(--cyan);background:rgba(24,214,236,.1)}
.faq-item.active .faq-icon::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s cubic-bezier(.22,.61,.36,1)}
.faq-a-inner{padding:0 24px 22px;color:var(--muted);font-size:15px;line-height:1.95;border-top:1px solid rgba(138,179,205,.1);margin-top:2px;padding-top:16px}

/* CTA */
.cta-section{padding:50px 0 90px}
.cta-panel{
  position:relative;border-radius:26px;padding:60px 48px;overflow:hidden;text-align:center;
  background:
   radial-gradient(circle at 12% 20%,rgba(24,214,236,.15),transparent 30%),
   radial-gradient(circle at 88% 80%,rgba(255,158,61,.13),transparent 32%),
   linear-gradient(120deg,#0C1D2A,#0E2432);
  border:1px solid rgba(138,179,205,.25);
}
.cta-panel h2{font-size:clamp(26px,3vw,36px);font-weight:700;letter-spacing:.03em}
.cta-panel p{color:var(--muted);max-width:580px;margin:14px auto 28px}
.cta-panel .cta-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}

/* Footer */
.footer{
  background:#050B13;border-top:1px solid rgba(138,179,205,.14);position:relative;z-index:2;
}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(24,214,236,.4),transparent)}
.footer .container{padding-top:72px;padding-bottom:36px}
.footer-grid{display:grid;grid-template-columns:1.35fr .8fr .85fr 1fr;gap:44px;margin-bottom:48px}
.footer-brand p.footer-desc{margin-top:17px;color:var(--muted);font-size:14px;line-height:1.9;max-width:320px}
.footer-col h4{font-size:15px;letter-spacing:.05em;margin-bottom:18px;color:var(--text);position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.footer-col ul li{margin-bottom:9px}
.footer-col ul a{color:var(--muted);font-size:14px;transition:var(--tr)}
.footer-col ul a:hover{color:var(--cyan);padding-left:5px}
.footer-subscribe small{color:var(--muted2);display:block;margin-bottom:16px;font-size:13px}
.footer-subscribe input{
  width:100%;height:42px;border-radius:11px;border:1px solid rgba(138,179,205,.3);
  background:rgba(6,13,23,.7);color:var(--text);padding:0 14px;font-size:14px;outline:none;
  transition:var(--tr);margin-bottom:12px;
}
.footer-subscribe input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(24,214,236,.12)}
.footer-subscribe input::placeholder{color:var(--muted2)}
.footer-bottom{
  border-top:1px solid rgba(138,179,205,.12);padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--muted2);font-size:13px;
}
.footer-line-arrow{font-style:normal;color:var(--cyan);letter-spacing:.1em}

/* Mobile nav */
.mobile-spacer{display:none}
@media(max-width:1060px){
  .catalog-grid{grid-template-columns:1fr}
  .catalog-lead{min-height:420px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .feature-main{grid-template-columns:1fr}
  .reco-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:820px){
  .site-nav{
    position:fixed;top:0;right:-100%;width:min(86vw,420px);height:100vh;z-index:100;
    background:rgba(6,13,23,.96);backdrop-filter:blur(20px);transition:right .42s cubic-bezier(.22,.61,.36,1);
    padding:100px 38px 40px;border-left:1px solid rgba(138,179,205,.18);
  }
  .site-nav.open{right:0}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:8px;margin-top:0}
  .site-nav li a{font-size:19px;min-height:54px;padding:0 16px;border-radius:14px}
  .site-nav li a::after{display:none}
  .site-nav li.active a{background:rgba(24,214,236,.1)}
  .nav-cta{margin-top:30px}
  .nav-toggle{display:inline-flex;position:relative;z-index:102}
  .header-backdrop{
    position:fixed;inset:0;z-index:98;background:rgba(2,7,12,.62);
    opacity:0;pointer-events:none;transition:.35s;
  }
  .header-backdrop.show{opacity:1;pointer-events:auto}
  .topic-hero .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-panel{max-width:480px}
  .hero-stats{grid-template-columns:1fr 1fr;row-gap:18px}
  .hero-stats .stat{border-left:none;text-align:left;padding:12px 6px}
  .hero-stats .stat:nth-child(odd){padding-left:0;border-right:1px solid rgba(138,179,205,.12);padding-left:0}
  .catalog-list{grid-template-columns:1fr 1fr}
  .section{padding:64px 0}
  .reco-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .container{padding:0 18px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .catalog-list{grid-template-columns:1fr}
  .catalog-lead{min-height:380px}
  .feature-holder{padding:24px}
  .mini-feature{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .section{padding:54px 0}
  .section-head p{font-size:15px}
  .hero-actions .btn{width:100%}
  .topic-hero{padding-top:64px}
  .topic-hero h1 span{font-size:17px}
}

/* roulang page: category3 */
:root{
  --bg:#060d17;
  --bg-deep:#050b12;
  --bg-2:#0b1620;
  --card:rgba(19,36,52,.66);
  --card-strong:rgba(23,44,61,.78);
  --border:rgba(138,179,205,.28);
  --line:rgba(138,179,205,.14);
  --cyan:#18d6ec;
  --cyan-soft:#38def5;
  --amber:#ff9e3d;
  --amber-soft:#ffc37d;
  --text:#e9f2fa;
  --muted:#93abc0;
  --muted-2:#5c7184;
  --r-xl:22px;
  --r-md:14px;
  --shadow:0 8px 24px rgba(3,10,18,.3);
  --shadow-hover:0 18px 44px rgba(2,20,34,.55);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-num:"Roboto Condensed","DIN Alternate",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-cn);font-size:16px;line-height:1.75;-webkit-text-size-adjust:100%}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;background-image:radial-gradient(rgba(138,179,205,.11) 1px,transparent 1px);background-size:26px 26px;opacity:.32}
main,header,footer{position:relative;z-index:1}
a{color:inherit;text-decoration:none;transition:color .22s ease}
img{max-width:100%;display:block;border:0}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,button{font:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 26px}
.section{padding:80px 0;position:relative}
.section + .section{border-top:1px solid var(--line)}
.section-label{display:flex;align-items:center;gap:10px;color:var(--cyan);letter-spacing:.2em;font-size:13px;text-transform:uppercase;font-weight:600;margin:0 0 12px}
.section-label::before{content:"";width:24px;height:1px;background:var(--cyan);box-shadow:0 0 10px rgba(24,214,236,.8)}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em}
h2{font-size:clamp(27px,3.2vw,36px);letter-spacing:.02em}
h3{font-size:20px}
.section-head{margin-bottom:36px}
.section-head p{margin:0;max-width:720px;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;min-height:44px;padding:0 22px;font-weight:600;letter-spacing:.03em;transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,border-color .22s ease;gap:8px;border:1px solid transparent}
.btn:focus-visible,.nav-toggle:focus-visible,input:focus-visible{outline:3px solid rgba(24,214,236,.4);outline-offset:2px}
.btn-primary{background:linear-gradient(135deg,#2ce2f5,#0aa9c7);color:#021720;box-shadow:0 0 16px rgba(24,214,236,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 24px rgba(24,214,236,.55)}
.btn-ghost{background:rgba(26,48,66,.42);border-color:rgba(182,224,240,.35);color:var(--text)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--cyan);color:var(--cyan-soft);box-shadow:0 0 20px rgba(24,214,236,.25)}
.btn-amber{background:linear-gradient(135deg,#ffb35c,#fa8a1c);color:#372009;box-shadow:0 0 14px rgba(255,158,61,.25)}
.btn-amber:hover{transform:translateY(-2px);box-shadow:0 0 24px rgba(255,158,61,.55)}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-weight:600}
.text-link:hover{color:var(--amber)}
.site-header{position:sticky;top:0;z-index:90;height:68px;background:rgba(6,13,23,.78);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.header-row{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;flex-direction:column;line-height:1;min-width:max-content}
.brand-main{font-size:22px;font-weight:800;letter-spacing:.03em;color:var(--text)}
.brand-main span{color:var(--cyan)}
.brand-sub{font-size:9px;letter-spacing:.36em;color:var(--muted-2);margin-top:7px;text-transform:uppercase}
.site-nav ul{display:flex;align-items:center;justify-content:flex-end;gap:4px;list-style:none;margin:0;padding:0}
.site-nav ul li{position:relative}
.site-nav ul li a{display:inline-flex;align-items:center;justify-content:center;padding:9px 15px;border-radius:999px;font-size:15px;color:#c9dce9;font-weight:500;transition:color .2s,background-color .2s}
.site-nav ul li a:hover{color:var(--text)}
.site-nav ul li.active a{color:#54e5f8;background:rgba(24,214,236,.12);box-shadow:inset 0 0 0 1px rgba(24,214,236,.2)}
.site-nav ul li.active a::after{content:"";position:absolute;left:22px;right:22px;bottom:-22px;height:2px;background:var(--cyan);box-shadow:0 -3px 12px rgba(24,214,236,.8)}
.site-nav ul li.nav-cta{margin-left:12px}
.site-nav ul li.nav-cta a{width:auto;padding:0 18px;min-height:38px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;border-radius:10px}
.burger-line,.burger-line::before,.burger-line::after{content:"";display:block;width:22px;height:2px;background:#b9d5e6;border-radius:3px;transition:.3s ease}
.burger-line{position:relative}
.burger-line::before{position:absolute;top:-7px}
.burger-line::after{position:absolute;top:7px}
.nav-toggle.open .burger-line{background:transparent}
.nav-toggle.open .burger-line::before{transform:rotate(45deg);top:0}
.nav-toggle.open .burger-line::after{transform:rotate(-45deg);top:0}
.category-hero{position:relative;overflow:hidden;padding:92px 0 108px;border-bottom:1px solid var(--line);background:
     linear-gradient(110deg,rgba(3,10,18,.95) 0%,rgba(8,18,30,.8) 48%,rgba(16,65,78,.42) 100%),
     url('/assets/images/backpic/back-3.png') center/cover no-repeat;
}
.category-hero::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:linear-gradient(90deg,transparent,var(--cyan),var(--amber),transparent);opacity:.75}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(24,214,236,.12);border:1px solid rgba(24,214,236,.25);color:#7deaf7;border-radius:999px;padding:7px 15px;font-size:13px;font-weight:600}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.hero-copy h1{font-size:clamp(44px,7vw,78px);font-weight:800;margin:20px 0 14px;letter-spacing:.02em;background:linear-gradient(115deg,#f3fbfe 20%,#52ddec 75%,#b9f4fb);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-lead{font-size:16.5px;color:#c9dbe4;max-width:560px;margin:0 0 28px;line-height:1.9}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-actions .btn{min-height:48px;padding:0 26px}
.hero-panel{padding:28px;border-radius:24px;background:rgba(14,39,59,.72);backdrop-filter:blur(14px);border:1px solid var(--border);box-shadow:var(--shadow);position:relative}
.hero-panel::before{content:"";position:absolute;top:-24px;right:32px;width:74px;height:74px;background:radial-gradient(circle,rgba(24,214,236,.22),transparent 70%)}
.hero-panel .mini-label{font-size:12px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase;margin-bottom:12px}
.thumb-stat{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:24px}
.thumb-stat div{background:rgba(6,22,32,.55);border:1px solid var(--line);border-radius:16px;padding:14px 8px;text-align:center}
.thumb-stat b{display:block;font-family:var(--font-num);font-size:22px;color:var(--cyan);line-height:1.1}
.thumb-stat span{display:block;font-size:12px;color:var(--muted);margin-top:5px}
.topic-chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;background:rgba(20,48,70,.44);border:1px solid rgba(138,179,205,.3);padding:6px 12px;border-radius:999px;font-size:13px;color:#d2e5ed}
.chip::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--amber);box-shadow:0 0 6px var(--amber)}
.section-more{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:32px}
.section-more .txt{color:var(--muted);font-size:14px}
.lesson-kicker,.feature-top{display:flex;align-items:center}
.directory-wrap{display:grid;grid-template-columns:1.08fr .92fr;gap:22px}
.directory-cards{display:grid;grid-template-rows:auto auto;gap:12px}
.class-feature{border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--border);background:var(--card-strong);box-shadow:var(--shadow);display:grid;grid-template-columns:1fr 1fr}
.class-pic{position:relative;min-height:300px;overflow:hidden}
.class-pic img{position:absolute;width:100%;height:100%;object-fit:cover;transition:transform .8s ease}
.class-feature:hover .class-pic img{transform:scale(1.06)}
.class-pic::after{content:"";position:absolute;inset:0;background:linear-gradient(45deg,rgba(4,12,20,.2) 10%,rgba(4,12,20,.76))}
.class-pic .pic-tag{position:absolute;top:18px;left:18px;z-index:2;background:rgba(9,22,34,.76);backdrop-filter:blur(7px);padding:6px 14px;border-radius:999px;border:1px solid rgba(255,158,61,.5);color:var(--amber);font-size:12px;font-weight:600}
.class-content{padding:30px;display:flex;flex-direction:column;justify-content:center}
.class-content .light-title{color:var(--cyan);font-family:var(--font-num);font-size:14px;letter-spacing:.2em;margin-bottom:8px}
.class-content h3{font-size:26px;margin-bottom:12px}
.class-content p{color:var(--muted);flex:1;margin:0 0 20px}
.dir-entry{display:flex;gap:14px;background:rgba(15,32,47,.52);border:1px solid var(--line);padding:16px 18px;border-radius:var(--r-md);transition:background .2s,border-color .22s,transform .22s}
.dir-entry:hover{background:rgba(24,214,236,.08);border-color:rgba(24,214,236,.45);transform:translateY(-2px)}
.dir-entry .dir-badge{width:42px;height:42px;flex-shrink:0;border-radius:13px;background:linear-gradient(140deg,rgba(24,214,236,.25),rgba(24,214,236,.04));color:var(--cyan);display:flex;align-items:center;justify-content:center;font-family:var(--font-num);font-weight:700}
.dir-entry h4{margin:2px 0 3px;font-size:16px}
.dir-entry p{font-size:13px;color:var(--muted);margin:0;line-height:1.6}
.lesson-list{display:grid;gap:14px}
.lesson-row{position:relative;display:grid;grid-template-columns:2.1fr 1fr;grid-template-areas:"info image";overflow:hidden;background:rgba(14,32,48,.62);border:1px solid var(--line);border-radius:var(--r-xl);padding:16px;gap:12px 26px;transition:border-color .24s,background .24s,transform .24s}
.lesson-row:hover{border-color:rgba(24,214,236,.45);background:rgba(21,54,76,.56);transform:translateY(-3px)}
.lesson-info{grid-area:info;display:flex;padding:6px 6px 6px 16px;flex-direction:column;justify-content:center}
.lesson-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:7px}
.lesson-meta span{font-size:12px;color:#a7bfcd;background:rgba(116,154,175,.1);padding:3px 10px;border-radius:999px;border:1px solid rgba(138,179,205,.14)}
.lesson-meta .hot{color:var(--amber);border-color:rgba(255,158,61,.26)}
.lesson-info h3{font-size:20px;margin-bottom:8px}
.lesson-info p{color:var(--muted);font-size:14px;margin:0 0 15px;max-width:590px}
.lesson-info .row-bottom{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:auto}
.lesson-num{position:absolute;right:14px;top:10px;font-family:var(--font-num);color:rgba(216,241,251,.2);font-size:48px;font-weight:800;letter-spacing:-.03em;pointer-events:none;transition:color .4s}
.lesson-row:hover .lesson-num{color:rgba(24,214,236,.17)}
.lesson-media{grid-area:image;align-self:center;border-radius:var(--r-md);overflow:hidden;position:relative;max-height:255px}
.lesson-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;transition:transform .6s}
.lesson-row:hover .lesson-media img{transform:scale(1.04)}
.track-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;position:relative}
.track-step{background:rgba(13,29,45,.58);border:1px solid var(--line);border-radius:var(--r-md);padding:24px 20px;position:relative;overflow:hidden}
.track-step::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,var(--cyan),transparent)}
.track-step .step-index{font-family:var(--font-num);font-size:34px;font-weight:700;color:transparent;-webkit-text-stroke:1px rgba(24,214,236,.55);line-height:1;display:block;margin-bottom:12px}
.track-step h3{font-size:16px;margin-bottom:8px}
.track-step p{margin:0;color:var(--muted);font-size:13px}
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.channel-card{position:relative;min-height:180px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);display:flex;align-items:flex-end;padding:20px;transition:transform .25s,border-color .25s,box-shadow .25s}
.channel-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.channel-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,16,24,.05) 0%,rgba(5,15,24,.96) 100%)}
.channel-card:hover{border-color:rgba(24,214,236,.5);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.channel-card > div{position:relative;z-index:2}
.channel-card .channel-tag{font-size:12px;color:var(--cyan);background:rgba(10,36,48,.78);border:1px solid rgba(24,214,236,.2);padding:3px 10px;border-radius:999px;display:inline-block;margin-bottom:8px}
.channel-card h3{margin:0 0 6px;font-size:19px;transition:color .2s}
.channel-card:hover h3{color:#8eeeea}
.channel-card p{font-size:13px;margin:0;color:rgba(223,237,244,.87)}
.faq-wrap{max-width:920px;margin:0 auto}
.faq-wrap details{background:rgba(16,34,49,.56);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:12px;padding:10px 18px;transition:background .25s}
.faq-wrap details[open]{background:rgba(17,61,82,.38);border-color:rgba(24,214,236,.4)}
.faq-wrap summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding:12px 0;font-weight:600}
.faq-wrap summary::-webkit-details-marker{display:none}
.faq-wrap summary::after{content:"+";flex-shrink:0;font-size:24px;line-height:1;margin-left:18px;color:var(--cyan);transition:transform .25s;width:24px;height:24px;display:flex;align-items:center;justify-content:center}
.faq-wrap details[open] summary::after{content:"–"}
.faq-body{padding:2px 0 14px;font-size:15px;color:var(--muted);line-height:1.9}
.final-cta{border-radius:28px;overflow:hidden;position:relative;border:1px solid rgba(255,158,61,.32);padding:66px 26px;text-align:center;background:linear-gradient(112deg,rgba(9,20,30,.86),rgba(22,49,66,.61)),url('/assets/images/backpic/back-2.png') center/cover no-repeat}
.final-cta::before{content:"";position:absolute;inset:auto -100px -110px;height:180px;background:radial-gradient(closest-side,rgba(24,214,236,.24),transparent 78%);opacity:.55}
.final-cta h2{font-size:clamp(25px,4vw,38px);margin-bottom:10px}
.final-cta p{color:#b7cbd7;margin:0 auto 28px;max-width:580px}
.final-cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;position:relative;z-index:2}
.footer{margin-top:0;background:#07111b;border-top:1px solid var(--line);padding-top:64px;position:relative}
.footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(24,214,236,.8),rgba(255,158,61,.65),transparent)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.45fr;gap:38px;padding-bottom:38px}
.footer-brand .brand{margin-bottom:13px}
.footer-desc{color:var(--muted);font-size:14px;margin:0;max-width:360px;line-height:1.9}
.footer-col h4{font-size:17px;color:#eaf4fa;margin-bottom:15px}
.footer-col ul{margin:0;padding:0;list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:14px}
.footer-col a:hover{color:var(--cyan)}
.footer-subscribe small{display:block;color:var(--muted);font-size:13px;margin-bottom:10px}
.footer-subscribe input{width:100%;height:40px;background:rgba(2,8,14,.6);border:1px solid var(--line);border-radius:10px;margin-bottom:9px;padding:0 14px;color:var(--text);font-size:14px}
.footer-subscribe input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(24,214,236,.13);outline:none}
.footer-bottom{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;color:#6a8295;font-size:13px;border-top:1px solid var(--line);padding:20px 0 22px}
.footer-line-arrow{color:var(--amber);font-style:normal}
.page-bottom-actions .btn{min-height:44px}
@media (min-width:1200px){
  .container{padding:0 30px}
}
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .site-nav{position:fixed;top:68px;left:0;right:0;height:calc(100vh - 68px);background:rgba(5,13,21,.94);backdrop-filter:blur(18px);display:none;padding:28px 26px;overflow-y:auto;z-index:80}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:4px}
  .site-nav ul li{margin:0}
  .site-nav ul li a{width:100%;justify-content:center;padding:13px 18px;border-radius:15px}
  .site-nav ul li.active a{background:rgba(24,214,236,.14)}
  .site-nav ul li.active a::after{display:none}
  .site-nav ul li.nav-cta{margin:16px 0 0}
  .site-nav ul li.nav-cta a{min-height:44px}
  .hero-inner{gap:34px;grid-template-columns:1fr}
  .hero-panel{max-width:540px}
  .directory-wrap{grid-template-columns:1fr}
  .track-wrap,.channel-grid{grid-template-columns:repeat(2,1fr)}
  .lesson-row{grid-template-columns:1fr;grid-template-areas:"image" "info";padding:0 0 20px}
  .lesson-media{margin:0;border-radius:var(--r-xl) var(--r-xl) 0 0;max-height:none}
  .lesson-media img{aspect-ratio:16/7}
  .lesson-info{padding:18px 16px 0}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .section{padding:60px 0}
  .container{padding-left:18px;padding-right:18px}
  .category-hero{padding:62px 0 82px}
  .hero-copy h1{font-size:38px;letter-spacing:0}
  .hero-lead{font-size:15px}
  .empty-space-min{display:none}
  .class-feature{grid-template-columns:1fr}
  .class-pic{min-height:200px}
  .class-content{padding:24px}
  .lesson-media img{aspect-ratio:16/10}
  .track-wrap,.channel-grid{grid-template-columns:1fr}
  .channel-card{min-height:150px}
  .section-more{flex-direction:column;align-items:flex-start}
  .hero-actions .btn{width:100%}
  .final-cta{padding:44px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center;justify-content:center;align-items:center}
}
@media (max-width:420px){
  .brand-main{font-size:18px}
  .brand-sub{letter-spacing:.2em}
  .hero-actions .btn{padding:0 18px;font-size:15px}
  .thumb-stat b{font-size:18px}
}

/* roulang page: category4 */
:root {
  --bg: #060D17;
  --bg2: #0B1620;
  --glass: rgba(19, 36, 52, 0.66);
  --line: rgba(138, 179, 205, 0.28);
  --primary: #18D6EC;
  --warm: #FF9E3D;
  --text: #E9F2FA;
  --muted: #92AABF;
  --dim: #5C7184;
  --maxw: 1200px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow: 0 8px 24px rgba(0, 10, 20, 0.3);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-num: "Barlow Condensed", "Roboto Condensed", "DIN Alternate", "Arial Narrow", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 20% -10%, rgba(24, 214, 236, 0.09), transparent 36%),
    radial-gradient(circle at 88% 6%, rgba(255, 158, 61, 0.05), transparent 28%);
  line-height: 1.7;
  overflow-x: clip;
}

body.nav-lock {
  overflow: hidden;
}

a {
  color: var(--white);
  text-decoration: none;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input {
  font-family: inherit;
}

ul, ol {
  margin: 0;
  padding: 0;
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.section {
  padding: 88px 0;
}

.section-head {
  margin-bottom: 48px;
  max-width: 780px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
}

.section-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary));
}

.section-head h2 {
  font-size: clamp(27px, 3.2vw, 36px);
  line-height: 1.24;
  margin: 12px 0 12px 0;
  letter-spacing: -0.01em;
  color: var(--text);
}

.section-head p {
  color: var(--muted);
  font-size: 16px;
  max-width: 700px;
  margin: 0;
}

h1, h2, h3, h4 {
  margin: 0;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--radius-pill);
  min-height: 46px;
  padding: 0 26px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #48E6F7 0%, #0DB4D0 100%);
  color: #03161E;
  box-shadow: 0 0 0 1px rgba(24, 214, 236, 0.22), 0 0 26px rgba(24, 214, 236, 0.28);
}

.btn-primary:hover, .btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(24, 214, 236, 0.4), 0 0 40px rgba(24, 214, 236, 0.42);
  background: linear-gradient(135deg, #6AF0FA 0%, #17C4E0 100%);
  color: #02131B;
}

.btn-ghost {
  background: rgba(19, 36, 52, 0.5);
  color: var(--text);
  border: 1px solid rgba(138, 179, 205, 0.5);
}

.btn-ghost:hover, .btn-ghost:focus-visible {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 0 22px rgba(24, 214, 236, 0.14);
  background: rgba(24, 214, 236, 0.08);
}

.btn-amber {
  background: linear-gradient(135deg, #FFB45B 0%, #FF8F32 100%);
  color: #241104;
  box-shadow: 0 0 0 1px rgba(255, 158, 61, 0.22), 0 0 22px rgba(255, 158, 61, 0.22);
}

.btn-amber:hover, .btn-amber:focus-visible {
  transform: translateY(-2px);
  color: #241104;
  box-shadow: 0 0 0 1px rgba(255, 158, 61, 0.45), 0 0 34px rgba(255, 158, 61, 0.38);
  background: linear-gradient(135deg, #FFC47A 0%, #FFA047 100%);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid rgba(24, 214, 236, 0.8);
  outline-offset: 3px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  height: 68px;
  background: rgba(6, 13, 23, 0.72);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(6, 13, 23, 0.94);
  border-bottom-color: rgba(138, 179, 205, 0.16);
  box-shadow: 0 10px 32px rgba(0, 8, 16, 0.28);
}

.header-row {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-main {
  font-size: 21px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.01em;
}

.brand-main span {
  color: var(--primary);
}

.brand-sub {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--dim);
  margin-top: 5px;
}

.site-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav li a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 15px;
  border-radius: var(--radius-pill);
  color: var(--muted);
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
}

.site-nav li a:hover {
  color: var(--text);
  background: rgba(138, 179, 205, 0.06);
}

.site-nav li.active a {
  color: var(--primary);
  background: rgba(24, 214, 236, 0.12);
  text-shadow: 0 0 12px rgba(24, 214, 236, 0.24);
}

.site-nav li.active a::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 14px rgba(24, 214, 236, 0.8);
}

.site-nav li.nav-cta {
  margin-left: 10px;
}

.site-nav li.nav-cta a {
  font-size: 14px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(138, 179, 205, 0.28);
  border-radius: 12px;
  background: rgba(19, 36, 52, 0.6);
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
}

.burger-line {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 4px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-header.nav-open .burger-line:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.site-header.nav-open .burger-line:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* Hero */
.cat-hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 80px;
  background-image:
    linear-gradient(180deg, rgba(6, 13, 23, 0.9), rgba(6, 13, 23, 0.78)),
    url("/assets/images/backpic/back-3.png");
  background-size: cover;
  background-position: center 36%;
  border-bottom: 1px solid rgba(138, 179, 205, 0.14);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.page-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: rgba(24, 214, 236, 0.1);
  border: 1px solid rgba(24, 214, 236, 0.22);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.page-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
}

.hero-copy h1 {
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.18;
  margin: 24px 0 20px;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.hero-copy h1 span {
  color: var(--primary);
}

.hero-desc {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  max-width: 610px;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-panel {
  background: rgba(19, 36, 52, 0.66);
  border: 1px solid rgba(138, 179, 205, 0.28);
  border-radius: 22px;
  padding: 26px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  position: relative;
}

.hero-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 28px;
  width: 76px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 0 0 4px 4px;
}

.hero-panel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.hero-panel-title strong {
  font-size: 17px;
  color: var(--text);
  font-weight: 700;
}

.hero-panel-title span {
  color: var(--warm);
  font-size: 13px;
  background: rgba(255, 158, 61, 0.1);
  border: 1px solid rgba(255, 158, 61, 0.24);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
}

.hero-panel ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-panel li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(6, 13, 23, 0.36);
  border: 1px solid rgba(138, 179, 205, 0.12);
  border-radius: 13px;
  padding: 13px 14px;
  color: var(--text);
  font-size: 14px;
}

.hero-panel li i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
  margin-top: 9px;
  box-shadow: 0 0 8px var(--primary);
}

.hero-panel li em {
  color: var(--muted);
  font-style: normal;
  display: block;
  font-size: 13px;
  margin-top: 1px;
}

/* 频道氛围条 */
.channel-strip {
  background: var(--bg2);
  border-top: 1px solid rgba(138, 179, 205, 0.12);
  border-bottom: 1px solid rgba(138, 179, 205, 0.12);
}

.strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.strip-item {
  padding: 34px 28px;
  border-left: 1px solid rgba(138, 179, 205, 0.12);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.strip-item:first-child {
  border-left: 0;
}

.strip-item strong {
  font-family: var(--font-num);
  font-size: 30px;
  line-height: 1;
  color: #fff;
  letter-spacing: 0.03em;
  font-weight: 700;
}

.strip-item strong span {
  color: var(--primary);
}

.strip-item p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

/* 频道目录 */
.topic-directory {
  padding: 96px 0 88px;
}

.topic-2col {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 40px;
}

.topic-2col .section-head {
  margin: 0;
}

.topic-side-note {
  background: rgba(19, 36, 52, 0.5);
  border: 1px solid rgba(138, 179, 205, 0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.topic-side-note h3 {
  color: var(--text);
  font-size: 18px;
  margin: 0 0 10px;
}

.topic-side-note p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
}

.topic-side-note ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.topic-side-note li {
  color: var(--text);
  font-size: 14px;
  background: rgba(24, 214, 236, 0.06);
  border: 1px solid rgba(24, 214, 236, 0.12);
  border-radius: 999px;
  padding: 5px 12px;
  text-align: center;
}

.topic-grid {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}

.topic-card {
  grid-column: span 4;
  background: rgba(19, 36, 52, 0.66);
  border: 1px solid rgba(138, 179, 205, 0.25);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.topic-card:hover {
  transform: translateY(-6px);
  border-color: rgba(24, 214, 236, 0.48);
  box-shadow: 0 18px 48px rgba(0, 10, 20, 0.45), 0 0 30px rgba(24, 214, 236, 0.1);
}

.topic-card-lead {
  grid-column: span 7;
  min-height: 260px;
}

.topic-card-follow {
  grid-column: span 5;
}

.card-media {
  position: relative;
  height: 170px;
  overflow: hidden;
}

.topic-card-lead .card-media {
  height: 250px;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.topic-card:hover .card-media img {
  transform: scale(1.05);
}

.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(6, 13, 23, 0.72));
}

.card-badge {
  position: absolute;
  right: 14px;
  top: 14px;
  z-index: 2;
  background: rgba(6, 13, 23, 0.72);
  color: var(--primary);
  border: 1px solid rgba(24, 214, 236, 0.28);
  border-radius: 999px;
  font-size: 12px;
  padding: 5px 12px;
  backdrop-filter: blur(8px);
}

.card-body {
  padding: 20px 22px 24px;
}

.card-body h3 {
  font-size: 20px;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: 0;
}

.card-body p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 18px;
  line-height: 1.8;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--dim);
  font-size: 12px;
}

.tag {
  display: inline-block;
  background: rgba(24, 214, 236, 0.08);
  border: 1px solid rgba(24, 214, 236, 0.2);
  color: var(--primary);
  border-radius: 999px;
  padding: 3px 11px;
  font-size: 12px;
}

.tag-warm {
  background: rgba(255, 158, 61, 0.08);
  border-color: rgba(255, 158, 61, 0.2);
  color: var(--warm);
}

/* 社区正在聊 */
.chat-highlight {
  background: var(--bg2);
  border-top: 1px solid rgba(138, 179, 205, 0.12);
  border-bottom: 1px solid rgba(138, 179, 205, 0.12);
}

.hot-rows {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hot-row {
  display: grid;
  grid-template-columns: 300px 1fr;
  background: rgba(19, 36, 52, 0.5);
  border: 1px solid rgba(138, 179, 205, 0.18);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.hot-row:hover {
  border-color: rgba(24, 214, 236, 0.4);
  box-shadow: 0 0 30px rgba(24, 214, 236, 0.07);
}

.hot-row-img {
  min-height: 180px;
  height: 100%;
  overflow: hidden;
}

.hot-row-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hot-row-content {
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.hot-row-content h3 {
  font-size: 20px;
  line-height: 1.5;
  color: var(--text);
  margin: 10px 0 8px;
}

.hot-row-content p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 0;
  max-width: 750px;
}

.hot-row-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.hot-row-meta .tag {
  margin-bottom: 0;
}

/* 互动流程 */
.flow-wrap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.flow-card {
  background: rgba(19, 36, 52, 0.44);
  border: 1px solid rgba(138, 179, 205, 0.16);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.flow-card:hover {
  background: rgba(19, 36, 52, 0.64);
  border-color: rgba(24, 214, 236, 0.34);
}

.flow-num {
  font-family: var(--font-num);
  font-size: 32px;
  color: transparent;
  -webkit-text-stroke: 1px rgba(24, 214, 236, 0.8);
  line-height: 1;
}

.flow-card h3 {
  color: var(--text);
  font-size: 19px;
  margin: 18px 0 10px;
}

.flow-card p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
  line-height: 1.85;
}

.rules-panel {
  margin-top: 24px;
  background: rgba(255, 158, 61, 0.06);
  border: 1px solid rgba(255, 158, 61, 0.2);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.rules-panel strong {
  color: var(--warm);
  font-size: 16px;
}

.rules-panel span {
  color: var(--muted);
  font-size: 14px;
  flex: 1;
  min-width: 260px;
}

/* FAQ */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(138, 179, 205, 0.18);
  background: rgba(19, 36, 52, 0.4);
  border-radius: 16px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item.active {
  border-color: rgba(24, 214, 236, 0.38);
  background: rgba(19, 36, 52, 0.6);
}

.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 20px 24px;
  background: transparent;
  border: 0;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
}

.faq-q-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border: 1px solid rgba(24, 214, 236, 0.3);
  color: var(--primary);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  transition: transform 0.3s ease, background 0.3s ease;
}

.faq-item.active .faq-q-icon {
  transform: rotate(135deg);
  background: rgba(24, 214, 236, 0.1);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-a-inner {
  padding: 0 26px 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.faq-a p {
  margin: 0;
}

/* 收藏CTA */
.share-cta {
  padding: 90px 0;
  background-image:
    linear-gradient(180deg, rgba(6, 13, 23, 0.85), rgba(6, 13, 23, 0.8)),
    url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
  border-top: 1px solid rgba(138, 179, 205, 0.14);
}

.share-box {
  text-align: center;
  background: rgba(19, 36, 52, 0.66);
  border: 1px solid rgba(138, 179, 205, 0.28);
  border-radius: 26px;
  padding: 54px 40px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  max-width: 960px;
  margin: 0 auto;
}

.share-box h2 {
  font-size: clamp(25px, 3.4vw, 36px);
  line-height: 1.3;
  margin: 8px 0 14px;
}

.share-box p {
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 28px;
  font-size: 15px;
}

.share-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  row-gap: 14px;
}

/* 页脚 */
.footer {
  background: #050C14;
  border-top: 1px solid rgba(138, 179, 205, 0.14);
  margin-top: 0;
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 0.8fr 1.2fr;
  gap: 46px;
  padding-bottom: 52px;
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-desc {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.9;
  margin: 0;
  max-width: 380px;
}

.footer-col h4 {
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 18px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: var(--muted);
  font-size: 14px;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-subscribe small {
  display: block;
  color: var(--dim);
  font-size: 13px;
  margin-bottom: 14px;
}

.footer-subscribe input {
  width: 100%;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(138, 179, 205, 0.28);
  background: rgba(6, 13, 23, 0.7);
  color: var(--text);
  padding: 0 18px;
  font-size: 14px;
  margin-bottom: 12px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.footer-subscribe input::placeholder {
  color: #6d8396;
}

.footer-subscribe input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 18px rgba(24, 214, 236, 0.16);
}

.subscribe-feedback {
  display: block;
  color: var(--primary);
  font-size: 13px;
  min-height: 20px;
  margin-top: 6px;
}

.subscribe-feedback.error {
  color: #FF6B7A;
}

.footer-bottom {
  border-top: 1px solid rgba(138, 179, 205, 0.12);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--dim);
  font-size: 13px;
}

.footer-bottom .footer-line-arrow {
  color: var(--primary);
  font-style: normal;
}

/* 收藏提示 */
.fav-tip {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translate(-50%, 18px);
  z-index: 300;
  background: rgba(11, 22, 32, 0.94);
  border: 1px solid rgba(24, 214, 236, 0.4);
  color: var(--text);
  box-shadow: 0 12px 40px rgba(0, 10, 20, 0.42), 0 0 22px rgba(24, 214, 236, 0.12);
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 14px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.fav-tip.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* 响应式 */
@media (max-width: 1100px) {
  .site-nav li a {
    padding: 0 10px;
    font-size: 14px;
  }
}

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .topic-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .topic-card,
  .topic-card-lead,
  .topic-card-follow {
    grid-column: span 1 !important;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .flow-wrap {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(86vw, 380px);
    margin: 0;
    background: rgba(6, 13, 23, 0.96);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-left: 1px solid rgba(138, 179, 205, 0.18);
    padding: 96px 28px 40px;
    transform: translateX(105%);
    transition: transform 0.35s ease;
    overflow-y: auto;
    z-index: 100;
  }

  .site-header.nav-open .site-nav {
    transform: translateX(0);
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .site-nav li a {
    width: 100%;
    min-height: 48px;
    font-size: 17px;
    padding: 0 16px;
    justify-content: flex-start;
  }

  .site-nav li.active a::after {
    left: 16px;
    right: auto;
    width: 30px;
  }

  .site-nav li.nav-cta {
    margin: 30px 0 0;
  }

  .site-nav li.nav-cta a {
    justify-content: center;
    min-height: 48px;
  }

  .header-row {
    position: relative;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .strip-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .strip-item {
    padding: 26px 20px;
    border-top: 1px solid rgba(138, 179, 205, 0.1);
  }

  .strip-item:nth-child(1),
  .strip-item:nth-child(2) {
    border-top: 0;
  }

  .topic-2col,
  .topic-grid {
    grid-template-columns: 1fr;
  }

  .topic-card,
  .topic-card-lead,
  .topic-card-follow {
    grid-column: span 1 !important;
  }

  .topic-side-note ul {
    grid-template-columns: 1fr;
  }

  .hot-row {
    grid-template-columns: 1fr;
  }

  .hot-row-img {
    height: 190px;
  }

  .hot-row-content {
    padding: 22px;
  }

  .flow-wrap {
    grid-template-columns: 1fr;
  }

  .share-box {
    padding: 38px 22px 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .strip-grid {
    grid-template-columns: 1fr;
  }

  .strip-item {
    border-top: 1px solid rgba(138, 179, 205, 0.1);
  }

  .strip-item:first-child {
    border-top: 0;
  }

  .hero-actions .btn {
    width: 100%;
    margin-bottom: 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-panel {
    padding: 20px;
  }

  .hero-panel li {
    font-size: 14px;
  }

  .topic-card-lead .card-media {
    height: 200px;
  }

  .faq-a-inner {
    padding: 0 20px 20px;
  }

  .share-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .share-actions .btn {
    width: 100%;
  }
}