/* roulang page: index */
:root{
  --ink-900:#060B16;
  --ink-800:#0A1424;
  --ink-700:#101D33;
  --brand-500:#1E7BFF;
  --brand-400:#4D9BFF;
  --aqua-400:#2FE0C0;
  --flare-500:#FF6B2C;
  --txt-hi:#EAF2FF;
  --txt-mid:#A8BBD6;
  --txt-low:#6E86A8;
  --line:rgba(120,180,255,.16);
  --line-strong:rgba(47,224,192,.45);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 20px 44px rgba(3,10,24,.6);
  --glow-aqua:0 0 0 1px rgba(47,224,192,.45),0 10px 34px rgba(47,224,192,.28);
  --glow-flare:0 10px 30px rgba(255,107,44,.35);
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-btn:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--txt-mid);
  --bs-primary:var(--brand-500);
  --bs-border-radius:12px;
  --bs-border-color:rgba(120,180,255,.16);
  --bs-link-color:var(--aqua-400);
  --bs-link-hover-color:#7CF3DC;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt-mid);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:var(--aqua-400);transition:color .2s var(--ease)}
a:hover{color:#7CF3DC}
h1,h2,h3,h4{color:var(--txt-hi);font-weight:800;letter-spacing:-.01em;margin:0}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.22}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3}
h3{font-size:20px;font-weight:700;line-height:1.45}
p{margin:0 0 1em}
ul{padding-left:1.1em}
::selection{background:rgba(47,224,192,.3);color:#fff}
:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px}
.container{max-width:1320px;padding-left:20px;padding-right:20px}
@media (min-width:992px){.container{max-width:960px}}
@media (min-width:1200px){.container{max-width:1140px}}
@media (min-width:1400px){.container{max-width:1320px}}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1030;background:linear-gradient(180deg,rgba(6,11,22,.96),rgba(6,11,22,.86));backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid var(--line)}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:12px;color:var(--txt-hi)}
.brand:hover{color:var(--txt-hi)}
.brand-mark{width:40px;height:40px;border-radius:12px;flex:0 0 40px;display:grid;place-items:center;background:linear-gradient(150deg,rgba(30,123,255,.35),rgba(47,224,192,.28));border:1px solid rgba(120,180,255,.35);color:var(--aqua-400);font-size:18px;box-shadow:var(--sh-1)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:19px;font-weight:800;letter-spacing:-.01em}
.brand-sub{font-size:12px;color:var(--txt-low);letter-spacing:.12em;text-transform:uppercase}
.brand-row-right{display:flex;align-items:center;gap:14px}
.head-contact{display:none;font-size:13px;color:var(--txt-mid);gap:8px;align-items:center}
.head-contact i{color:var(--aqua-400)}
@media (min-width:992px){.head-contact{display:flex}}
.menu-toggle{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--txt-hi);font-size:17px;cursor:pointer;transition:.2s var(--ease)}
.menu-toggle:hover{border-color:var(--line-strong);color:var(--aqua-400)}
@media (min-width:992px){.menu-toggle{display:none}}
.channel-row{background:rgba(4,8,18,.82);border-top:1px solid rgba(120,180,255,.09);transition:height .25s var(--ease)}
.channel-inner{display:flex;gap:8px;align-items:stretch;overflow-x:auto;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{position:relative;display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 16px;font-size:15px;font-weight:600;color:var(--txt-mid);white-space:nowrap;transition:color .18s var(--ease)}
.channel-link:hover{color:var(--txt-hi)}
.channel-link::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:3px;border-radius:3px 3px 0 0;background:linear-gradient(90deg,var(--brand-400),var(--aqua-400));opacity:0;transition:opacity .18s var(--ease)}
.channel-link:hover::after{opacity:.45}
.channel-link.active{color:var(--txt-hi)}
.channel-link.active::after{opacity:1;box-shadow:0 0 14px rgba(47,224,192,.5)}
.channel-link i{font-size:13px;color:var(--aqua-400);opacity:.85}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:rgba(6,11,22,.98);padding:10px 20px 18px}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;gap:10px;min-height:46px;color:var(--txt-mid);font-weight:600;border-bottom:1px dashed rgba(120,180,255,.12)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.active{color:var(--aqua-400)}

/* ============ buttons ============ */
.btn-flare,.btn-glass{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:11px 22px;border-radius:var(--r-btn);font-weight:700;font-size:15px;letter-spacing:.01em;transition:transform .2s var(--ease),box-shadow .22s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);cursor:pointer}
.btn-flare{background:linear-gradient(140deg,#FF7A3D,#FF6B2C);color:#1a0c04;border:1px solid rgba(255,150,100,.5);box-shadow:var(--glow-flare)}
.btn-flare:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(255,107,44,.5);color:#1a0c04}
.btn-flare:active{transform:translateY(1px)}
.btn-glass{background:var(--glass);border:1px solid var(--line);color:var(--txt-hi);backdrop-filter:blur(14px)}
.btn-glass:hover{border-color:var(--line-strong);color:var(--txt-hi);transform:translateY(-2px);box-shadow:var(--glow-aqua)}
.btn-flare.sm,.btn-glass.sm{min-height:42px;padding:9px 18px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:7px;font-weight:700;font-size:14px;color:var(--aqua-400);position:relative}
.link-more i{transition:transform .2s var(--ease)}
.link-more:hover i{transform:translateX(4px)}
.link-more::after{content:"";position:absolute;left:0;right:22px;bottom:-4px;height:1px;background:linear-gradient(90deg,var(--aqua-400),transparent);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.link-more:hover::after{transform:scaleX(1)}

/* ============ generic section ============ */
.section{padding:96px 0}
.section.alt{background:var(--ink-800);border-top:1px solid rgba(120,180,255,.08);border-bottom:1px solid rgba(120,180,255,.08)}
@media (max-width:991.98px){.section{padding:72px 0}}
@media (max-width:575.98px){.section{padding:56px 0}}
.section-head{margin-bottom:44px;max-width:760px}
.section-head.row-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;max-width:none;flex-wrap:wrap}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--aqua-400);font-weight:700;margin-bottom:14px}
.eyebrow::before{content:"";width:26px;height:2px;background:linear-gradient(90deg,var(--brand-400),var(--aqua-400))}
.lead{color:var(--txt-mid);font-size:16.5px;margin:14px 0 0}
.glass-card{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--sh-1);position:relative;overflow:hidden}
.glass-card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent)}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;border-bottom:1px solid rgba(120,180,255,.1);min-height:620px;display:flex;align-items:center}
.hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.42}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(900px 520px at 78% 28%,rgba(47,224,192,.18),transparent 65%),radial-gradient(760px 480px at 12% 78%,rgba(30,123,255,.22),transparent 62%),linear-gradient(180deg,rgba(6,11,22,.72) 0%,rgba(6,11,22,.9) 62%,var(--ink-900) 100%)}
.hero .container{position:relative;z-index:2;padding-top:72px;padding-bottom:72px}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;background:rgba(47,224,192,.1);border:1px solid rgba(47,224,192,.35);color:var(--aqua-400);font-size:13px;font-weight:700;letter-spacing:.06em}
.hero-badge i{font-size:11px}
.hero h1{margin:22px 0 18px;text-wrap:balance}
.hero h1 span{background:linear-gradient(100deg,var(--aqua-400),var(--brand-400));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:18px;color:#C6D6EC;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px 40px;margin-top:44px;padding-top:26px;border-top:1px solid rgba(120,180,255,.18)}
.hero-stat b{display:block;font-size:26px;font-weight:800;color:var(--txt-hi);line-height:1.2}
.hero-stat span{font-size:13px;color:var(--txt-low)}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);aspect-ratio:4/3;background:var(--ink-700)}
.hero-visual img{width:100%;height:100%;object-fit:cover;opacity:.92}
.hero-visual-cap{position:absolute;left:16px;right:16px;bottom:16px;padding:14px 16px;border-radius:14px;background:rgba(6,11,22,.72);border:1px solid var(--line);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:space-between;gap:12px}
.hero-visual-cap strong{color:var(--txt-hi);font-size:15px;display:block}
.hero-visual-cap small{color:var(--txt-low);font-size:12.5px}
.live-dot{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--flare-500)}
.live-dot i{font-size:8px;animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
@media (max-width:991.98px){
  .hero{min-height:560px}
  .hero .container{padding-top:52px;padding-bottom:52px}
  .hero-visual{margin-top:40px;aspect-ratio:16/10}
}

/* ============ bento services ============ */
.bento-card{height:100%;padding:28px;display:flex;flex-direction:column;gap:14px;transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .24s var(--ease)}
.bento-card:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.4);box-shadow:var(--sh-2)}
.bento-card .icon-badge{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:rgba(47,224,192,.12);border:1px solid rgba(47,224,192,.32);color:var(--aqua-400);font-size:18px}
.bento-card h3{margin:0}
.bento-card p{margin:0;font-size:15px;color:var(--txt-mid)}
.bento-media{border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;border:1px solid var(--line);background:var(--ink-700)}
.bento-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.bento-card:hover .bento-media img{transform:scale(1.05)}
.bento-flags{display:flex;flex-wrap:wrap;gap:8px}
.bento-flag{font-size:12px;padding:5px 11px;border-radius:999px;background:rgba(30,123,255,.12);border:1px solid rgba(30,123,255,.3);color:#9CC6FF;letter-spacing:.02em}

/* ============ stats band ============ */
.stat-band{background:linear-gradient(120deg,rgba(12,22,42,.96),rgba(8,14,28,.96));border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:56px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{padding:8px 24px;border-left:1px solid rgba(120,180,255,.16)}
.stat-item:first-child{border-left:0;padding-left:0}
.stat-item b{display:block;font-size:40px;line-height:1.1;font-weight:800;color:var(--txt-hi)}
.stat-item b small{font-size:16px;font-weight:700;color:var(--aqua-400);margin-left:3px}
.stat-item span{display:block;margin-top:8px;font-size:14px;color:var(--txt-mid)}
@media (max-width:767.98px){
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:26px 0}
  .stat-item:nth-child(3){border-left:0;padding-left:0}
  .stat-item b{font-size:32px}
}

/* ============ case grid ============ */
.case-card{position:relative;display:block;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--ink-700);aspect-ratio:4/3;transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease)}
.case-card img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease);opacity:.9}
.case-card:hover{transform:translateY(-6px);border-color:rgba(47,224,192,.5);box-shadow:var(--sh-2);color:inherit}
.case-card:hover img{transform:scale(1.04)}
.case-info{position:absolute;left:14px;right:14px;bottom:14px;padding:14px 16px;border-radius:14px;background:rgba(6,11,22,.74);border:1px solid var(--line);backdrop-filter:blur(12px);transition:border-color .24s var(--ease)}
.case-card:hover .case-info{border-color:rgba(47,224,192,.55)}
.case-info strong{display:block;color:var(--txt-hi);font-size:16px}
.case-info small{color:var(--txt-low);font-size:12.5px}

/* ============ steps ============ */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding-top:34px}
.steps::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,rgba(30,123,255,.5),rgba(47,224,192,.75),rgba(30,123,255,.1))}
.step{position:relative;padding-top:22px}
.step::before{content:"";position:absolute;top:-7px;left:0;width:12px;height:12px;border-radius:50%;background:var(--aqua-400);box-shadow:0 0 0 5px rgba(47,224,192,.16),0 0 18px rgba(47,224,192,.6)}
.step b{display:block;font-size:13px;letter-spacing:.16em;color:var(--aqua-400);font-weight:800;margin-bottom:10px}
.step h3{margin-bottom:8px;font-size:18px}
.step p{font-size:14.5px;color:var(--txt-mid);margin:0}
@media (max-width:991.98px){
  .steps{grid-template-columns:repeat(2,1fr);gap:34px 26px}
}
@media (max-width:575.98px){
  .steps{grid-template-columns:1fr}
  .steps::before{display:none}
}

/* ============ posts (CMS) ============ */
.post-card{display:flex;flex-direction:column;height:100%;background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;backdrop-filter:blur(14px);transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .26s var(--ease)}
.post-card:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.42);box-shadow:var(--sh-2)}
.post-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--ink-700)}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.post-card:hover .post-cover img{transform:scale(1.05)}
.badge-cat{position:absolute;left:12px;top:12px;font-size:12px;font-weight:700;letter-spacing:.06em;padding:5px 12px;border-radius:999px;background:rgba(47,224,192,.16);border:1px solid rgba(47,224,192,.45);color:#8DF3E1;backdrop-filter:blur(8px)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-body h3{font-size:18px;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body h3 a{color:var(--txt-hi)}
.post-body h3 a:hover{color:var(--aqua-400)}
.post-body p{margin:0;font-size:14.5px;color:var(--txt-mid);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:14px;border-top:1px solid rgba(120,180,255,.13);font-size:12.5px;color:var(--txt-low)}
.post-foot i{color:var(--aqua-400);margin-right:6px}
.empty-card{padding:44px 32px;text-align:center;border-radius:var(--r-card);background:var(--glass);border:1px dashed rgba(120,180,255,.3);backdrop-filter:blur(14px)}
.empty-card i{font-size:26px;color:var(--aqua-400)}
.empty-card p{margin:14px 0 20px;color:var(--txt-mid)}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px}
@media (max-width:991.98px){.faq-wrap{grid-template-columns:1fr;gap:28px}}
.acc-item{border-radius:14px;background:var(--glass);border:1px solid var(--line);margin-bottom:12px;overflow:hidden;position:relative;transition:border-color .22s var(--ease)}
.acc-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--aqua-400),var(--brand-400));transform:scaleY(0);transform-origin:top;transition:transform .26s var(--ease)}
.acc-item.open{border-color:rgba(47,224,192,.4)}
.acc-item.open::before{transform:scaleY(1)}
.acc-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;background:transparent;border:0;text-align:left;color:var(--txt-hi);font-size:17px;font-weight:600;cursor:pointer;font-family:inherit}
.acc-item.open .acc-btn{color:var(--aqua-400)}
.acc-btn i{font-size:14px;color:var(--txt-low);transition:transform .26s var(--ease),color .2s var(--ease);flex:0 0 auto}
.acc-item.open .acc-btn i{transform:rotate(45deg);color:var(--aqua-400)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.acc-panel-inner{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--txt-mid)}

/* ============ contact ============ */
.contact-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:start}
@media (max-width:991.98px){.contact-grid{grid-template-columns:1fr}}
.form-card{padding:32px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(16px)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--txt-mid);margin-bottom:8px;letter-spacing:.02em}
.form-control,.form-select{width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-input);background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-hi);font-family:inherit;font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease)}
.form-control::placeholder{color:var(--txt-low)}
.form-control:focus,.form-select:focus{outline:none;border-color:var(--aqua-400);background:rgba(255,255,255,.06);box-shadow:0 0 0 4px rgba(47,224,192,.15)}
.form-select option{background:var(--ink-800);color:var(--txt-hi)}
textarea.form-control{min-height:120px;resize:vertical}
.form-note{font-size:12.5px;color:var(--txt-low);margin-top:14px}
.form-msg{display:none;margin-top:16px;padding:12px 16px;border-radius:12px;background:rgba(47,224,192,.1);border:1px solid rgba(47,224,192,.4);color:#8DF3E1;font-size:14px}
.form-msg.show{display:block}
.info-card{padding:28px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(16px)}
.info-line{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed rgba(120,180,255,.14)}
.info-line:last-of-type{border-bottom:0}
.info-line i{color:var(--aqua-400);margin-top:5px}
.info-line b{display:block;color:var(--txt-hi);font-size:15px;font-weight:700}
.info-line span{font-size:13.5px;color:var(--txt-mid)}
.map-box{margin-top:20px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/10;background:var(--ink-700)}
.map-box img{width:100%;height:100%;object-fit:cover;opacity:.85}

/* ============ footer ============ */
.site-footer{background:#04070F;border-top:1px solid transparent;border-image:linear-gradient(90deg,transparent,rgba(47,224,192,.7),rgba(30,123,255,.6),transparent) 1;padding-top:64px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
@media (max-width:991.98px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575.98px){.foot-grid{grid-template-columns:1fr;gap:30px}}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--txt-hi);font-weight:800;font-size:18px;margin-bottom:14px}
.foot-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:15px;border-radius:10px}
.site-footer p{font-size:14px;color:var(--txt-mid)}
.foot-title{font-size:14px;font-weight:800;color:var(--txt-hi);margin-bottom:16px;letter-spacing:.04em}
.foot-links{list-style:none;padding:0;margin:0}
.foot-links li{margin-bottom:10px}
.foot-links a{color:var(--txt-mid);font-size:14px;display:inline-flex;align-items:center;gap:8px;transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a:hover{color:var(--aqua-400);transform:translateX(2px)}
.foot-links i{font-size:11px;color:var(--txt-low)}
.foot-bottom{margin-top:52px;padding:22px 0;border-top:1px solid rgba(120,180,255,.12);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12px;color:var(--txt-low)}
.to-top{position:fixed;right:22px;bottom:22px;width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--glass);border:1px solid var(--line);color:var(--txt-hi);backdrop-filter:blur(14px);box-shadow:var(--sh-2);opacity:0;pointer-events:none;transition:opacity .26s var(--ease),transform .26s var(--ease),border-color .2s var(--ease);z-index:1040;cursor:pointer}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{border-color:var(--line-strong);color:var(--aqua-400);transform:translateY(-3px)}
@media (max-width:575.98px){.to-top{right:14px;bottom:14px;width:44px;height:44px}}

/* roulang page: article */
:root{
  --ink-900:#060B16;
  --ink-800:#0A1424;
  --ink-700:#101D33;
  --brand-500:#1E7BFF;
  --brand-400:#4D9BFF;
  --aqua-400:#2FE0C0;
  --flare-500:#FF6B2C;
  --txt-hi:#EAF2FF;
  --txt-mid:#A8BBD6;
  --txt-low:#6E86A8;
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --line:rgba(120,180,255,.16);
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 20px 44px rgba(3,10,24,.6);
  --glow-aqua:0 0 0 1px rgba(47,224,192,.45),0 10px 34px rgba(47,224,192,.28);
  --glow-flare:0 10px 30px rgba(255,107,44,.35);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:#060B16;
  --bs-body-color:#A8BBD6;
  --bs-primary:#1E7BFF;
  --bs-primary-rgb:30,123,255;
  --bs-border-radius:12px;
  --bs-link-color:#2FE0C0;
  --bs-link-hover-color:#EAF2FF;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt-mid);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--aqua-400);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--txt-hi)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--txt-hi);font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;padding-inline:20px;margin-inline:auto}
@media(min-width:576px){.container{max-width:540px}}
@media(min-width:768px){.container{max-width:720px}}
@media(min-width:992px){.container{max-width:960px}}
@media(min-width:1200px){.container{max-width:1140px}}
@media(min-width:1400px){.container{max-width:1320px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(6,11,22,.78);backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);border-bottom:1px solid rgba(120,180,255,.12);transition:box-shadow .25s var(--ease)}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.brand-row{border-bottom:1px solid rgba(120,180,255,.08)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--txt-hi)}
.brand:hover{color:var(--txt-hi)}
.brand-mark{width:40px;height:40px;flex:0 0 40px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(140deg,rgba(30,123,255,.9),rgba(47,224,192,.75));color:#04101f;font-size:19px;box-shadow:0 8px 24px rgba(30,123,255,.35)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:19px;font-weight:800;letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:12px;color:var(--txt-low);letter-spacing:.14em}
.brand-tools{display:flex;align-items:center;gap:18px}
.tool-tip{font-size:13px;color:var(--txt-low);display:inline-flex;align-items:center;gap:7px}
.tool-tip i{color:var(--aqua-400)}
.channel-row{background:rgba(10,20,36,.72)}
.channel-inner{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;padding:4px 0}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{position:relative;display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 16px;font-size:15px;color:var(--txt-mid);white-space:nowrap;border-radius:10px;transition:color .18s var(--ease),background .18s var(--ease)}
.channel-link i{font-size:14px;opacity:.85}
.channel-link::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--aqua-400),var(--brand-400));transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);box-shadow:0 0 12px rgba(47,224,192,.6)}
.channel-link:hover{color:var(--txt-hi);background:rgba(255,255,255,.04)}
.channel-link:hover::after{transform:scaleX(1)}
.channel-link.active{color:var(--txt-hi);background:rgba(47,224,192,.08)}
.channel-link.active::after{transform:scaleX(1)}
.channel-link:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease)}
.btn:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.btn-flare{background:var(--flare-500);color:#1a0a02;box-shadow:var(--glow-flare)}
.btn-flare:hover{background:#ff7d44;color:#1a0a02;transform:translateY(-2px);box-shadow:0 14px 38px rgba(255,107,44,.45)}
.btn-flare:active{transform:translateY(-1px)}
.btn-glass{background:var(--glass);border:1px solid var(--line);color:var(--txt-mid);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.btn-glass:hover{border-color:rgba(47,224,192,.6);color:var(--txt-hi);background:rgba(47,224,192,.1);transform:translateY(-2px)}
.btn-glass:active{transform:translateY(-1px)}

/* ---------- banner ---------- */
.page-banner{position:relative;overflow:hidden;padding:52px 0 40px;background:linear-gradient(90deg,rgba(6,11,22,.94),rgba(6,11,22,.6)),url('/assets/images/backpic/back-2.png') center/cover no-repeat}
.page-banner::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,224,192,.55),transparent)}
.page-banner .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--txt-low)}
.crumb a{color:var(--txt-mid)}
.crumb a:hover{color:var(--aqua-400)}
.crumb .sep{opacity:.45}
.crumb .cur{max-width:min(560px,70vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--txt-low)}

/* ---------- article head ---------- */
.article-main{padding:52px 0 8px}
.article-head{max-width:860px;margin:0 auto 32px;text-align:left}
.badge-aqua{display:inline-flex;align-items:center;gap:7px;padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--aqua-400);background:rgba(47,224,192,.12);border:1px solid rgba(47,224,192,.32)}
.article-head h1{margin:18px 0 20px;font-size:clamp(28px,4.2vw,46px);font-weight:800;letter-spacing:-.015em;line-height:1.28}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--txt-low);font-variant-numeric:tabular-nums}
.meta-row span{display:inline-flex;align-items:center;gap:7px}
.meta-row i{color:var(--brand-400);font-size:12px}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:rgba(120,180,255,.35);padding:0}
.article-cover{position:relative;max-width:1040px;margin:0 auto 46px;aspect-ratio:21/9;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2)}
.article-cover img{width:100%;height:100%;object-fit:cover}
.article-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,22,0) 55%,rgba(6,11,22,.55))}

/* ---------- article body ---------- */
.article-body{max-width:800px;margin:0 auto;font-size:17px;line-height:1.9;color:var(--txt-mid);word-wrap:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{position:relative;margin:40px 0 16px;padding-left:16px;font-size:24px;font-weight:700;line-height:1.45}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--aqua-400);box-shadow:0 0 12px rgba(47,224,192,.7)}
.article-body h3{margin:28px 0 12px;font-size:18px;font-weight:700}
.article-body h4{margin:22px 0 10px;font-size:16px;font-weight:700;color:var(--txt-hi)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:6px}
.article-body li{margin:0 0 .6em;padding-left:20px;position:relative}
.article-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--aqua-400);opacity:.85}
.article-body ol{counter-reset:li;padding-left:0}
.article-body ol li{padding-left:30px;counter-increment:li}
.article-body ol li::before{content:counter(li);position:absolute;left:0;top:.28em;width:20px;height:20px;border-radius:6px;background:rgba(47,224,192,.14);color:var(--aqua-400);font-size:12px;font-weight:700;display:grid;place-items:center}
.article-body blockquote{margin:24px 0;padding:18px 22px;border-radius:12px;border:1px solid var(--line);border-left:4px solid var(--aqua-400);background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));color:var(--txt-mid)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{max-width:100%;height:auto;margin:22px auto;border-radius:var(--r-img);border:1px solid var(--line)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:8px;font-size:13px;color:var(--txt-low);text-align:center}
.article-body a{color:var(--aqua-400);border-bottom:1px solid rgba(47,224,192,.4)}
.article-body a:hover{color:var(--txt-hi);border-bottom-color:var(--aqua-400)}
.article-body table{width:100%;margin:22px 0;border-collapse:collapse;font-size:15px;overflow:hidden;border-radius:12px}
.article-body th{background:rgba(47,224,192,.12);color:var(--txt-hi);font-weight:600;text-align:left;padding:12px 14px;border:1px solid var(--line)}
.article-body td{padding:12px 14px;border:1px solid rgba(120,180,255,.12)}
.article-body tbody tr:nth-child(odd) td{background:rgba(255,255,255,.03)}
.article-body hr{margin:36px 0;border:0;height:1px;background:linear-gradient(90deg,transparent,rgba(120,180,255,.35),transparent)}
.article-body code{padding:2px 7px;border-radius:6px;background:rgba(30,123,255,.14);color:var(--brand-400);font-size:14px}
.empty-card{max-width:560px;margin:20px auto;padding:44px 28px;text-align:center;border-radius:var(--r-card);border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.empty-card i{font-size:34px;color:var(--aqua-400);margin-bottom:16px;display:block}
.empty-card p{margin-bottom:22px;color:var(--txt-mid);font-size:16px}

/* ---------- back entry ---------- */
.entry-bar{max-width:800px;margin:46px auto 0;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;padding:20px 22px;border-radius:var(--r-card);border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.entry-bar .entry-txt{font-size:14px;color:var(--txt-low)}
.entry-bar .entry-txt strong{display:block;font-size:16px;color:var(--txt-hi);font-weight:600;margin-bottom:4px}

/* ---------- related ---------- */
.section{padding:80px 0}
.section-alt{background:var(--ink-800)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px}
.section-head h2{font-size:clamp(23px,3vw,32px);font-weight:800}
.section-head .sub{margin-top:8px;font-size:14px;color:var(--txt-low)}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--aqua-400)}
.text-link i{transition:transform .2s var(--ease)}
.text-link:hover i{transform:translateX(4px)}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{display:flex;flex-direction:column;border-radius:var(--r-card);border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);overflow:hidden;color:inherit;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.42);box-shadow:var(--sh-2);color:inherit}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.05)}
.rel-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:18px;font-weight:700}
.rel-body p{font-size:14px;color:var(--txt-mid);line-height:1.75}
.rel-more{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--aqua-400);font-weight:600}
.rel-card:hover .rel-more i{transform:translateX(4px)}
.rel-more i{transition:transform .2s var(--ease)}

/* ---------- cta ---------- */
.cta-band{padding:72px 0;background:var(--ink-800);border-top:1px solid rgba(120,180,255,.1);border-bottom:1px solid rgba(120,180,255,.1)}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;padding:40px 42px;border-radius:var(--r-card);border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:var(--sh-1)}
.cta-inner h2{font-size:clamp(22px,2.8vw,30px);font-weight:800;margin-bottom:10px}
.cta-inner p{font-size:15px;color:var(--txt-mid)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-footer{background:#04070F;position:relative;padding:64px 0 28px}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,224,192,.6),rgba(30,123,255,.5),transparent)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:800;color:var(--txt-hi);margin-bottom:16px}
.foot-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:16px;border-radius:10px}
.site-footer p{font-size:14px;color:var(--txt-low);line-height:1.85;max-width:340px}
.foot-title{font-size:15px;font-weight:700;color:var(--txt-hi);margin-bottom:18px}
.foot-links li{margin-bottom:12px}
.foot-links a{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:var(--txt-mid);transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a i{font-size:11px;color:var(--txt-low);transition:color .2s var(--ease)}
.foot-links a:hover{color:var(--aqua-400);transform:translateX(2px)}
.foot-links a:hover i{color:var(--aqua-400)}
.foot-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(120,180,255,.1);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:12px;color:var(--txt-low)}

/* ---------- to top ---------- */
.to-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);background:rgba(16,29,51,.85);color:var(--aqua-400);font-size:16px;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:all .25s var(--ease);z-index:1040;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:rgba(47,224,192,.6);box-shadow:var(--glow-aqua)}

@media(max-width:1399px){
  .foot-grid{gap:32px}
}
@media(max-width:1199px){
  .site-footer{padding:56px 0 24px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:991px){
  .brand-inner{height:64px}
  .brand-text em{display:none}
  .tool-tip{display:none}
  .section{padding:64px 0}
  .article-main{padding:40px 0 8px}
  .article-cover{aspect-ratio:16/9;margin-bottom:36px}
  .rel-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .cta-inner{padding:30px 26px}
}
@media(max-width:767px){
  .brand-text strong{font-size:17px}
  .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:17px}
  .channel-link{height:42px;padding:0 13px;font-size:14px}
  .page-banner{padding:38px 0 30px}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px;margin-top:34px}
  .section{padding:56px 0}
  .rel-grid{grid-template-columns:1fr}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1;min-width:44px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;gap:8px}
  .to-top{right:16px;bottom:18px}
}
@media(max-width:575px){
  .container{padding-inline:18px}
  .article-head h1{font-size:26px}
  .entry-bar{padding:18px}
  .entry-bar .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --ink-900:#060B16;
  --ink-800:#0A1424;
  --ink-700:#101D33;
  --brand-500:#1E7BFF;
  --brand-400:#4D9BFF;
  --aqua-400:#2FE0C0;
  --flare-500:#FF6B2C;
  --txt-hi:#EAF2FF;
  --txt-mid:#A8BBD6;
  --txt-low:#6E86A8;
  --glass-bg:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --glass-line:1px solid rgba(120,180,255,.16);
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 20px 44px rgba(3,10,24,.6);
  --glow-aqua:0 0 0 1px rgba(47,224,192,.45),0 10px 34px rgba(47,224,192,.28);
  --glow-flare:0 10px 30px rgba(255,107,44,.35);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--txt-mid);
  --bs-primary:var(--brand-500);
  --bs-border-radius:var(--r-card);
  --bs-link-color:var(--aqua-400);
  --bs-link-hover-color:#5CF0D6;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt-mid);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--aqua-400);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:#5CF0D6}
h1,h2,h3,h4{color:var(--txt-hi);font-weight:800;letter-spacing:-.01em;margin:0}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px;border-radius:6px}
.container{max-width:1320px;padding-left:24px;padding-right:24px;margin:0 auto}
@media (max-width:767.98px){.container{padding-left:20px;padding-right:20px}}

/* ============ 头部导航 ============ */
.site-header{position:sticky;top:0;z-index:1030}
.brand-bar{
  background:rgba(6,11,22,.78);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(120,180,255,.08);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.scrolled .brand-bar{background:rgba(6,11,22,.94);box-shadow:var(--sh-2)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
.brand{display:inline-flex;align-items:center;gap:11px;color:var(--txt-hi);text-decoration:none}
.brand:hover{color:var(--txt-hi)}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand-500),var(--aqua-400));
  color:#04121A;font-size:16px;box-shadow:var(--glow-aqua);flex:0 0 auto;
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-right{display:flex;align-items:center;gap:16px}
.brand-note{font-size:13px;color:var(--txt-low);display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.brand-note i{color:var(--aqua-400)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid rgba(120,180,255,.2);background:rgba(255,255,255,.04);
  color:var(--txt-hi);font-size:16px;cursor:pointer;
}
.channel-bar{
  background:rgba(4,9,18,.88);
  border-bottom:1px solid rgba(120,180,255,.12);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:box-shadow .25s var(--ease);
}
.site-header.scrolled .channel-bar{box-shadow:0 14px 30px rgba(3,10,24,.5)}
.channel-inner{display:flex;align-items:stretch;gap:4px;height:52px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:0 16px;height:52px;white-space:nowrap;
  color:var(--txt-mid);font-size:15px;font-weight:600;text-decoration:none;
  transition:color .18s var(--ease);
}
.channel-link i{font-size:13px;opacity:.75}
.channel-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--aqua-400),var(--brand-400));
  opacity:0;transform:scaleX(.35);transform-origin:left;transition:all .22s var(--ease);
}
.channel-link:hover{color:var(--txt-hi)}
.channel-link:hover::after{opacity:.5;transform:scaleX(1)}
.channel-link.active{color:var(--txt-hi)}
.channel-link.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 18px rgba(47,224,192,.55)}

/* ============ 按钮 ============ */
.btn-flare,.btn-glass{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;text-decoration:none;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-flare{background:var(--flare-500);color:#1A0A02;box-shadow:var(--glow-flare)}
.btn-flare:hover{background:#FF7C44;color:#1A0A02;transform:translateY(-2px);box-shadow:0 14px 38px rgba(255,107,44,.45)}
.btn-flare:active{transform:translateY(1px)}
.btn-glass{
  background:var(--glass-bg);border:1px solid rgba(120,180,255,.24);
  color:var(--txt-mid);backdrop-filter:blur(12px);
}
.btn-glass:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.6);background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-glass:active{transform:translateY(1px)}
.btn-sm-x{min-height:40px;padding:0 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--aqua-400)}
.link-arrow i{transition:transform .22s var(--ease)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ 分类 Hero ============ */
.page-hero{position:relative;overflow:hidden;display:flex;align-items:center;min-height:360px;padding:56px 0}
.page-hero__bg{position:absolute;inset:0;background-image:url(/assets/images/backpic/back-1.webp);background-size:cover;background-position:center;opacity:.34}
.page-hero__mask{position:absolute;inset:0;background:
  radial-gradient(900px 420px at 16% 26%,rgba(30,123,255,.3),transparent 62%),
  radial-gradient(700px 320px at 88% 82%,rgba(47,224,192,.14),transparent 66%),
  linear-gradient(180deg,rgba(6,11,22,.6),rgba(6,11,22,.96));}
.page-hero__inner{position:relative;z-index:2;width:100%}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--txt-low);margin-bottom:20px}
.crumb a{color:var(--txt-low);text-decoration:none}
.crumb a:hover{color:var(--aqua-400)}
.crumb i{font-size:10px;opacity:.6}
.page-hero h1{font-size:clamp(30px,4vw,50px);line-height:1.24;margin-bottom:16px}
.hero-lead{max-width:660px;font-size:17px;color:var(--txt-mid);margin:0}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;
  background:rgba(47,224,192,.1);border:1px solid rgba(47,224,192,.28);
  color:#8BF2DE;font-size:13px;letter-spacing:.04em;font-weight:600;
}
.chip.alt{background:rgba(255,107,44,.1);border-color:rgba(255,107,44,.32);color:#FFB08A}

/* ============ 分类标签行 ============ */
.tabs-wrap{padding:22px 0 0;background:var(--ink-900)}
.cat-tabs{display:flex;gap:12px;overflow-x:auto;padding-bottom:8px;scrollbar-width:none;-ms-overflow-style:none}
.cat-tabs::-webkit-scrollbar{display:none}
.cat-tab{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;border-radius:999px;
  border:1px solid rgba(120,180,255,.18);background:rgba(255,255,255,.03);
  color:var(--txt-mid);font-size:14px;font-weight:700;text-decoration:none;
  transition:all .22s var(--ease);
}
.cat-tab:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.45);transform:translateY(-2px)}
.cat-tab.active{color:var(--txt-hi);border-color:rgba(47,224,192,.7);background:rgba(47,224,192,.1);box-shadow:var(--glow-aqua)}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-alt{background:var(--ink-800)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.sec-title{font-size:clamp(24px,3vw,32px);line-height:1.3}
.sec-sub{font-size:15px;color:var(--txt-low);margin:10px 0 0;max-width:720px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  letter-spacing:.14em;color:var(--aqua-400);text-transform:uppercase;margin-bottom:12px;
}

/* ============ 直播卡片网格 ============ */
.stream-card{
  position:relative;height:100%;border-radius:var(--r-card);overflow:hidden;
  background:var(--glass-bg);border:var(--glass-line);
  box-shadow:var(--sh-1);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.stream-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
}
.stream-card:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.4);box-shadow:var(--sh-2)}
.stream-card > a{display:flex;flex-direction:column;height:100%;text-decoration:none;color:inherit}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-700)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.stream-card:hover .card-media img{transform:scale(1.05)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,22,.05),rgba(6,11,22,.62))}
.badge-soft{
  position:absolute;left:14px;top:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.04em;
  background:rgba(47,224,192,.16);border:1px solid rgba(47,224,192,.42);color:#8BF2DE;
  backdrop-filter:blur(8px);
}
.badge-live{
  position:absolute;right:14px;top:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:999px;font-size:12px;font-weight:700;
  background:rgba(255,107,44,.16);border:1px solid rgba(255,107,44,.45);color:#FFB08A;
  backdrop-filter:blur(8px);
}
.badge-live i{font-size:8px;animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}
.card-body-x{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.card-title-x{
  font-size:18px;font-weight:700;line-height:1.5;color:var(--txt-hi);margin:0 0 9px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  font-size:14px;line-height:1.75;color:var(--txt-mid);margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--txt-low);font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.card-meta span{display:inline-flex;align-items:center;gap:7px}
.card-meta i.fa-clock-rotate-left,.card-meta i.fa-arrow-right{transition:transform .22s var(--ease)}
.stream-card:hover .card-meta i.fa-arrow-right{transform:translateX(4px);color:var(--aqua-400)}

/* ============ 数据带 ============ */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-card);overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.015));
  border:var(--glass-line);box-shadow:var(--sh-2);
}
.stat-cell{padding:34px 26px;text-align:center;border-left:1px solid rgba(120,180,255,.14)}
.stat-cell:first-child{border-left:0}
.stat-num{
  font-size:40px;font-weight:800;color:var(--txt-hi);line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.stat-num small{font-size:15px;font-weight:700;color:var(--aqua-400);margin-left:4px;letter-spacing:0}
.stat-label{margin-top:10px;font-size:14px;color:var(--txt-low)}

/* ============ 相关分类 ============ */
.cat-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat-strip-item{
  display:flex;align-items:center;gap:16px;padding:22px;
  border-radius:var(--r-card);background:var(--glass-bg);border:var(--glass-line);
  text-decoration:none;color:inherit;transition:all .24s var(--ease);
}
.cat-strip-item:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.42);box-shadow:var(--sh-2);color:inherit}
.cat-strip-icon{
  width:52px;height:52px;flex:0 0 auto;border-radius:15px;display:grid;place-items:center;
  background:rgba(30,123,255,.14);border:1px solid rgba(77,155,255,.32);
  color:var(--brand-400);font-size:19px;transition:all .24s var(--ease);
}
.cat-strip-item:hover .cat-strip-icon{background:rgba(47,224,192,.14);border-color:rgba(47,224,192,.5);color:var(--aqua-400)}
.cat-strip-item h3{font-size:17px;font-weight:700;margin-bottom:5px}
.cat-strip-item p{font-size:13.5px;color:var(--txt-low);margin:0;line-height:1.7}

/* ============ FAQ ============ */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{
  border-radius:14px;background:var(--glass-bg);border:var(--glass-line);
  margin-bottom:12px;overflow:hidden;transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.faq-item[open]{border-color:rgba(47,224,192,.4);box-shadow:0 12px 34px rgba(3,10,24,.5)}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:19px 22px 19px 26px;font-size:17px;font-weight:600;color:var(--txt-hi);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:15px;bottom:15px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--aqua-400),var(--brand-400));
  opacity:0;transition:opacity .24s var(--ease);
}
.faq-item[open] summary::before{opacity:1}
.faq-item[open] summary{color:#FFFFFF}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(120,180,255,.3);color:var(--aqua-400);font-size:12px;
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(47,224,192,.6)}
.faq-answer{padding:0 26px 22px;font-size:15px;line-height:1.85;color:var(--txt-mid)}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  background:linear-gradient(150deg,rgba(30,123,255,.14),rgba(47,224,192,.06) 55%,rgba(255,255,255,.02));
  border:var(--glass-line);box-shadow:var(--sh-2);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;opacity:.1;
}
.cta-copy{position:relative;z-index:2;max-width:660px}
.cta-copy h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.cta-copy p{font-size:15.5px;color:var(--txt-mid);margin:0}
.cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:#04070F;padding:64px 0 0;margin-top:0}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(47,224,192,.85),rgba(30,123,255,.85),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:11px;color:var(--txt-hi);font-size:18px;font-weight:800;margin-bottom:16px}
.foot-brand .brand-mark{width:34px;height:34px;font-size:14px;border-radius:11px}
.site-footer p{font-size:14px;line-height:1.85;color:var(--txt-low);margin:0;max-width:380px}
.foot-title{font-size:14px;font-weight:800;color:var(--txt-hi);letter-spacing:.04em;margin-bottom:16px}
.foot-links li{margin-bottom:11px}
.foot-links a{
  display:inline-flex;align-items:center;gap:9px;font-size:14px;color:var(--txt-low);
  text-decoration:none;transition:color .2s var(--ease),transform .2s var(--ease);
}
.foot-links a i{font-size:11px;color:rgba(110,134,168,.7);transition:color .2s var(--ease)}
.foot-links a:hover{color:var(--aqua-400);transform:translateX(2px)}
.foot-links a:hover i{color:var(--aqua-400)}
.foot-bottom{
  margin-top:52px;padding:20px 0 26px;border-top:1px solid rgba(120,180,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:var(--txt-low);letter-spacing:.02em;
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .container{max-width:960px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:991.98px){
  .section{padding:72px 0}
  .stat-band{grid-template-columns:1fr 1fr}
  .stat-cell:nth-child(3){border-left:0}
  .stat-cell{border-top:1px solid rgba(120,180,255,.14)}
  .stat-cell:nth-child(-n+2){border-top:0}
  .cat-strip{grid-template-columns:1fr}
  .cta-band{padding:40px 30px}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .section{padding:56px 0}
  .page-hero{min-height:320px;padding:44px 0}
  .brand-note{display:none}
  .nav-toggle{display:grid;place-items:center}
  .channel-bar{max-height:0;overflow:hidden;transparent;transition:max-height .28s var(--ease)}
  .channel-bar.open{max-height:340px;overflow:visible}
  .channel-inner{flex-direction:column;height:auto;padding:8px 0 14px;gap:2px}
  .channel-link{height:46px;border-radius:12px;padding:0 14px}
  .channel-link::after{left:0;right:auto;width:3px;height:22px;top:50%;bottom:auto;transform:translateY(-50%) scaleY(.4)}
  .channel-link:hover::after,.channel-link.active::after{transform:translateY(-50%) scaleY(1)}
  .stat-cell{padding:26px 18px}
  .stat-num{font-size:32px}
  .cta-actions .btn-flare,.cta-actions .btn-glass{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:30px}
  .foot-bottom{flex-direction:column;gap:8px}
}
@media (max-width:575.98px){
  .brand-text{font-size:17px}
  .sec-head{margin-bottom:26px}
  .faq-item summary{font-size:15.5px;padding:16px 18px 16px 22px}
  .faq-answer{padding:0 20px 18px}
  .card-body-x{padding:16px 16px 18px}
}

/* roulang page: category2 */
:root{
  --ink-900:#060B16;
  --ink-800:#0A1424;
  --ink-700:#101D33;
  --brand-500:#1E7BFF;
  --brand-400:#4D9BFF;
  --aqua-400:#2FE0C0;
  --flare-500:#FF6B2C;
  --txt-hi:#EAF2FF;
  --txt-mid:#A8BBD6;
  --txt-low:#6E86A8;
  --line:rgba(120,180,255,.16);
  --line-soft:rgba(120,180,255,.10);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --glass-strong:linear-gradient(160deg,rgba(255,255,255,.11),rgba(255,255,255,.03));
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-btn:12px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 20px 44px rgba(3,10,24,.6);
  --glow-aqua:0 0 0 1px rgba(47,224,192,.45),0 10px 34px rgba(47,224,192,.28);
  --glow-flare:0 10px 30px rgba(255,107,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--txt-mid);
  --bs-primary:var(--brand-500);
  --bs-border-radius:12px;
  --bs-link-color:var(--aqua-400);
  --bs-link-hover-color:#8df3df;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt-mid);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);}
button{font:inherit;}
h1,h2,h3,h4{color:var(--txt-hi);font-weight:700;letter-spacing:-.01em;margin:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1320px;margin:0 auto;padding-left:20px;padding-right:20px;}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* bootstrap 组件去默认味 */
.card{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);color:var(--txt-mid);box-shadow:var(--sh-1);}
.btn{border-radius:var(--r-btn);font-weight:600;letter-spacing:.01em;transition:all .2s var(--ease);}
.btn:focus-visible{box-shadow:0 0 0 4px rgba(47,224,192,.2);}
.form-control,.form-select{background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-hi);border-radius:var(--r-input);height:48px;}
.form-control::placeholder{color:var(--txt-low);}
.form-control:focus,.form-select:focus{background:rgba(255,255,255,.06);border-color:var(--aqua-400);color:var(--txt-hi);box-shadow:0 0 0 4px rgba(47,224,192,.15);}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:transparent;}
.badge{border-radius:999px;font-weight:600;letter-spacing:.04em;}

/* ===== 头部 ===== */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,11,22,.72);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line-soft);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.scrolled{background:rgba(6,11,22,.92);box-shadow:var(--sh-2);}
.brand-row{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;transition:height .25s var(--ease);}
.site-header.scrolled .brand-row{height:64px;}
.brand-lockup{display:flex;align-items:center;gap:12px;color:var(--txt-hi);font-size:20px;font-weight:800;letter-spacing:-.01em;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--brand-500),var(--aqua-400));
  color:#04121f;font-size:17px;box-shadow:0 0 0 1px rgba(47,224,192,.4),0 8px 22px rgba(47,224,192,.25);
}
.brand-sub{display:block;font-size:12px;font-weight:500;color:var(--txt-low);letter-spacing:.06em;line-height:1.2;}
.brand-txt{display:flex;flex-direction:column;line-height:1.25;}
.head-right{display:flex;align-items:center;gap:14px;}
.head-contact{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--txt-mid);}
.head-contact i{color:var(--aqua-400);}
.head-contact:hover{color:var(--txt-hi);}

.btn-flare{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--flare-500);color:#1a0900;border:0;
  padding:12px 22px;min-height:44px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;box-shadow:var(--glow-flare);
}
.btn-flare:hover{background:#ff8248;color:#1a0900;transform:translateY(-2px);box-shadow:0 14px 34px rgba(255,107,44,.45);}
.btn-flare:active{transform:translateY(-1px);}
.btn-glass{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--glass);color:var(--txt-hi);
  border:1px solid var(--line);padding:12px 22px;min-height:44px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;
}
.btn-glass:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.55);background:var(--glass-strong);transform:translateY(-2px);}
.btn-glass:active{transform:translateY(-1px);}

.channel-row{
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(10,20,36,.92),rgba(6,11,22,.88));
}
.channel-inner{
  display:flex;align-items:center;gap:6px;height:52px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  transition:height .25s var(--ease);
}
.channel-inner::-webkit-scrollbar{display:none;}
.site-header.scrolled .channel-inner{height:48px;}
.channel-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;font-size:15px;color:var(--txt-mid);
  white-space:nowrap;border-radius:10px;
}
.channel-link i{font-size:13px;opacity:.8;}
.channel-link:hover{color:var(--txt-hi);background:rgba(120,180,255,.08);}
.channel-link.active{color:var(--txt-hi);font-weight:600;}
.channel-link.active i{color:var(--aqua-400);opacity:1;}
.channel-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--aqua-400),var(--brand-400));
  box-shadow:0 0 12px rgba(47,224,192,.55);
}

/* ===== 分类 Hero ===== */
.cat-hero{
  position:relative;
  min-height:360px;
  display:flex;align-items:flex-end;
  padding:72px 0 44px;
  background-image:
    radial-gradient(900px 420px at 12% 20%,rgba(30,123,255,.22),transparent 60%),
    radial-gradient(700px 380px at 88% 80%,rgba(47,224,192,.16),transparent 62%),
    linear-gradient(90deg,rgba(6,11,22,.95) 0%,rgba(6,11,22,.78) 46%,rgba(6,11,22,.52) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover,cover,cover,cover;
  background-position:center,center,center,center;
  border-bottom:1px solid var(--line-soft);
}
.cat-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(47,224,192,.7),rgba(30,123,255,.6),transparent);
  opacity:.7;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.04em;
  background:rgba(47,224,192,.12);color:#7defd6;border:1px solid rgba(47,224,192,.32);
  margin-bottom:18px;
}
.cat-hero h1{
  font-size:48px;line-height:1.22;font-weight:800;max-width:900px;
  margin-bottom:16px;
}
.cat-hero h1 em{font-style:normal;color:var(--aqua-400);}
.cat-hero .hero-lead{max-width:660px;font-size:17px;color:var(--txt-mid);}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;font-size:13px;color:var(--txt-mid);
  background:var(--glass);border:1px solid var(--line);
}
.hero-chip i{color:var(--brand-400);font-size:12px;}

/* ===== 面包屑 ===== */
.crumb-bar{padding:20px 0 4px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--txt-low);}
.crumb a{color:var(--txt-low);}
.crumb a:hover{color:var(--aqua-400);}
.crumb .sep{opacity:.55;}
.crumb .cur{color:var(--txt-mid);}

/* ===== 分类频道标签行 ===== */
.topic-tabs{
  display:flex;gap:12px;overflow-x:auto;scrollbar-width:none;
  padding:22px 0 6px;
}
.topic-tabs::-webkit-scrollbar{display:none;}
.topic-tab{
  display:inline-flex;align-items:center;gap:9px;white-space:nowrap;
  padding:11px 20px;border-radius:999px;font-size:14.5px;font-weight:600;
  background:var(--glass);border:1px solid var(--line);color:var(--txt-mid);
}
.topic-tab i{font-size:13px;color:var(--brand-400);}
.topic-tab:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.4);transform:translateY(-2px);}
.topic-tab.active{
  color:var(--txt-hi);border-color:rgba(47,224,192,.55);
  background:rgba(47,224,192,.10);box-shadow:var(--glow-aqua);
}
.topic-tab.active i{color:var(--aqua-400);}

/* ===== 通用板块 ===== */
.section{padding:88px 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.sec-head{max-width:820px;margin-bottom:48px;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
  color:var(--aqua-400);text-transform:uppercase;margin-bottom:14px;font-weight:600;
}
.sec-kicker::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--aqua-400),transparent);}
.sec-head h2{font-size:32px;line-height:1.35;margin-bottom:14px;}
.sec-head p{font-size:16.5px;color:var(--txt-mid);}

/* ===== 数据带 ===== */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
.stat-cell{padding:26px 24px;position:relative;}
.stat-cell + .stat-cell{border-left:1px solid var(--line-soft);}
.stat-num{font-size:38px;font-weight:800;color:var(--txt-hi);line-height:1.1;font-variant-numeric:tabular-nums;letter-spacing:.01em;}
.stat-num span{font-size:14px;font-weight:600;color:var(--aqua-400);margin-left:4px;letter-spacing:.06em;}
.stat-label{font-size:14px;color:var(--txt-low);margin-top:8px;}

/* ===== 左右交替图文块 ===== */
.split-row{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
  padding-bottom:64px;margin-bottom:64px;border-bottom:1px solid var(--line-soft);
}
.split-row:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.split-row.reverse{grid-template-columns:7fr 5fr;}
.split-row.reverse .split-media{order:2;}
.split-row.reverse .split-body{order:1;}
.split-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:4/3;border:1px solid var(--line);box-shadow:var(--sh-1);
  background:var(--ink-700);
}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease);}
.split-row:hover .split-media img{transform:scale(1.04);}
.split-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 13px;border-radius:999px;font-size:12px;letter-spacing:.06em;font-weight:600;
  background:rgba(30,123,255,.14);color:#9cc6ff;border:1px solid rgba(30,123,255,.32);
  margin-bottom:16px;
}
.split-tag.aqua{background:rgba(47,224,192,.13);color:#7defd6;border-color:rgba(47,224,192,.32);}
.split-tag.flare{background:rgba(255,107,44,.13);color:#ffb08a;border-color:rgba(255,107,44,.32);}
.split-body h3{font-size:24px;line-height:1.4;margin-bottom:14px;}
.split-body p{font-size:16px;color:var(--txt-mid);margin-bottom:20px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:600;color:var(--aqua-400);
  padding-bottom:3px;position:relative;
}
.link-arrow::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--aqua-400),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.link-arrow i{transition:transform .25s var(--ease);}
.link-arrow:hover{color:#8df3df;}
.link-arrow:hover i{transform:translateX(4px);}
.link-arrow:hover::after{transform:scaleX(1);}

/* ===== 相关分类 ===== */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.rel-card:hover{transform:translateY(-6px);border-color:rgba(47,224,192,.42);box-shadow:var(--sh-2);}
.rel-cover{aspect-ratio:16/9;overflow:hidden;background:var(--ink-700);}
.rel-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.rel-card:hover .rel-cover img{transform:scale(1.05);}
.rel-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-body h3{font-size:19px;}
.rel-body p{font-size:14.5px;color:var(--txt-mid);}
.rel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--txt-low);}
.rel-foot i{color:var(--aqua-400);}

/* ===== FAQ ===== */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.faq-item.open{border-color:rgba(47,224,192,.42);box-shadow:0 14px 34px rgba(3,10,24,.5);}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:none;border:0;color:var(--txt-hi);font-size:17px;font-weight:600;
  text-align:left;padding:18px 20px;cursor:pointer;min-height:44px;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--aqua-400),var(--brand-400));
  opacity:0;transition:opacity .24s var(--ease);
}
.faq-item.open .faq-q::before{opacity:1;}
.faq-q span{color:var(--txt-mid);}
.faq-plus{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  background:rgba(120,180,255,.12);color:var(--aqua-400);font-size:15px;font-weight:600;
  transition:transform .24s var(--ease),background .24s var(--ease);
}
.faq-item.open .faq-plus{transform:rotate(45deg);background:rgba(47,224,192,.2);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--txt-mid);}

/* ===== CTA ===== */
.cta-band{padding:0 0 96px;}
.cta-panel{
  background:
    radial-gradient(760px 300px at 8% 10%,rgba(30,123,255,.20),transparent 62%),
    radial-gradient(620px 300px at 92% 92%,rgba(47,224,192,.16),transparent 60%),
    var(--glass-strong);
  border:1px solid var(--line);border-radius:22px;
  padding:48px;display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;
  box-shadow:var(--sh-2);
}
.cta-panel h2{font-size:30px;line-height:1.35;margin-bottom:14px;}
.cta-panel .cta-note{font-size:15.5px;color:var(--txt-mid);}
.cta-points{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px;}
.cta-points span{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--txt-mid);}
.cta-points i{color:var(--aqua-400);font-size:12px;}
.cta-form{display:flex;flex-direction:column;gap:14px;}
.cta-form label{font-size:13px;color:var(--txt-low);margin-bottom:6px;display:block;}
.cta-form .field-row{display:flex;gap:10px;}
.cta-form .field-row .form-control{flex:1;}
.form-tip{font-size:13px;color:var(--txt-low);}
.form-tip.ok{color:var(--aqua-400);}

/* ===== 页脚 ===== */
.site-footer{
  background:#04070F;border-top:1px solid transparent;
  position:relative;padding:64px 0 26px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,192,.65),rgba(30,123,255,.55),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.foot-brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:800;color:var(--txt-hi);margin-bottom:16px;}
.foot-brand .brand-mark{width:34px;height:34px;font-size:15px;border-radius:10px;}
.site-footer p{font-size:14.5px;color:var(--txt-low);max-width:340px;}
.foot-title{font-size:15px;font-weight:700;color:var(--txt-hi);margin-bottom:16px;}
.foot-links li{margin-bottom:11px;}
.foot-links a{display:inline-flex;align-items:center;gap:9px;font-size:14.5px;color:var(--txt-mid);}
.foot-links a i{font-size:11px;color:var(--txt-low);transition:color .2s var(--ease);}
.foot-links a:hover{color:var(--aqua-400);transform:translateX(2px);}
.foot-links a:hover i{color:var(--aqua-400);}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12.5px;color:var(--txt-low);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:var(--glass-strong);border:1px solid var(--line);color:var(--txt-hi);
  backdrop-filter:blur(14px);box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .3s var(--ease);cursor:pointer;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:rgba(47,224,192,.55);color:var(--aqua-400);}

/* ===== 响应式 ===== */
@media (max-width:1399.98px){
  .container{max-width:1200px;}
}
@media (max-width:1199.98px){
  .container{max-width:960px;}
  .cat-hero h1{font-size:40px;}
  .split-row,.split-row.reverse{grid-template-columns:1fr 1fr;gap:34px;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;gap:32px;padding:40px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:991.98px){
  .container{max-width:100%;}
  .section{padding:72px 0;}
  .cat-hero{min-height:320px;padding:60px 0 36px;}
  .cat-hero h1{font-size:34px;}
  .stat-band{grid-template-columns:1fr 1fr;}
  .stat-cell:nth-child(3){border-left:0;border-top:1px solid var(--line-soft);}
  .stat-cell:nth-child(4){border-top:1px solid var(--line-soft);}
  .split-row,.split-row.reverse{grid-template-columns:1fr;gap:24px;padding-bottom:44px;margin-bottom:44px;}
  .split-row.reverse .split-media{order:0;}
  .split-row.reverse .split-body{order:0;}
  .rel-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767.98px){
  .brand-row{height:64px;}
  .head-contact{display:none;}
  .cat-hero{min-height:300px;padding:48px 0 32px;}
  .cat-hero h1{font-size:30px;}
  .cat-hero .hero-lead{font-size:15.5px;}
  .sec-head h2{font-size:24px;}
  .sec-head{margin-bottom:32px;}
  .section{padding:56px 0;}
  .stat-num{font-size:30px;}
  .stat-cell{padding:20px 18px;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-panel{padding:28px 22px;border-radius:18px;}
  .cta-panel h2{font-size:24px;}
  .cta-form .field-row{flex-direction:column;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:0 0 56px;}
  .split-body h3{font-size:21px;}
}
@media (max-width:575.98px){
  .container{padding-left:20px;padding-right:20px;}
  .cat-hero h1{font-size:26px;}
  .stat-band{grid-template-columns:1fr;}
  .stat-cell + .stat-cell{border-left:0;border-top:1px solid var(--line-soft);}
  .to-top{right:16px;bottom:16px;}
  .hero-chip{font-size:12.5px;}
}

/* roulang page: category3 */
:root{
  --ink-900:#060B16; --ink-800:#0A1424; --ink-700:#101D33;
  --brand-500:#1E7BFF; --brand-400:#4D9BFF;
  --aqua-400:#2FE0C0; --flare-500:#FF6B2C;
  --txt-hi:#EAF2FF; --txt-mid:#A8BBD6; --txt-low:#6E86A8;
  --line:rgba(120,180,255,.16);
  --line-soft:rgba(120,180,255,.09);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --r-card:18px; --r-img:14px; --r-input:12px; --r-btn:12px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 20px 44px rgba(3,10,24,.6);
  --glow-aqua:0 0 0 1px rgba(47,224,192,.45),0 10px 34px rgba(47,224,192,.28);
  --glow-flare:0 10px 30px rgba(255,107,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--txt-mid);
  --bs-primary:var(--brand-500);
  --bs-link-color:var(--aqua-400);
  --bs-link-hover-color:#7df0da;
  --bs-border-color:var(--line);
  --bs-border-radius:12px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--ink-900);color:var(--txt-mid);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16.5px;line-height:1.85;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(120,180,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,180,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 78%);
}
img{max-width:100%;display:block}
a{color:var(--aqua-400);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:#7df0da}
h1,h2,h3,h4{color:var(--txt-hi);font-weight:800;letter-spacing:-.01em;margin:0;line-height:1.28}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;width:100%}
.brand-row{
  height:72px;display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(6,11,22,.86),rgba(6,11,22,.42));
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.scrolled .brand-row{
  background:rgba(8,14,28,.82);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line-soft);
  box-shadow:var(--sh-2);
}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;color:var(--txt-hi);font-weight:800;font-size:19px;letter-spacing:-.01em}
.brand:hover{color:var(--txt-hi)}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(30,123,255,.35),rgba(47,224,192,.22));
  border:1px solid rgba(120,180,255,.3);
  color:var(--aqua-400);font-size:16px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18);
}
.brand-side{display:flex;align-items:center;gap:14px}
.brand-contact{font-size:14px;color:var(--txt-mid);display:inline-flex;align-items:center;gap:7px}
.brand-contact i{color:var(--aqua-400)}
.brand-contact:hover{color:var(--txt-hi)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);color:var(--txt-hi);align-items:center;justify-content:center;
}
.channel-row{
  background:rgba(4,8,18,.9);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  backdrop-filter:blur(14px) saturate(140%);
  transition:height .25s var(--ease);
}
.channel-inner{display:flex;align-items:center;gap:6px;height:52px;transition:height .25s var(--ease)}
.site-header.scrolled .channel-inner{height:48px}
.channel-link{
  display:inline-flex;align-items:center;gap:8px;height:100%;padding:0 16px;
  color:var(--txt-mid);font-size:15px;font-weight:600;position:relative;white-space:nowrap;
  transition:color .18s var(--ease);
}
.channel-link i{font-size:13px;color:var(--txt-low);transition:color .18s var(--ease)}
.channel-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:3px;border-radius:3px 3px 0 0;
  background:linear-gradient(90deg,var(--aqua-400),var(--brand-400));
  transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.channel-link:hover{color:var(--txt-hi)}
.channel-link:hover i{color:var(--aqua-400)}
.channel-link:hover::after{transform:scaleX(.5)}
.channel-link.active{color:var(--txt-hi)}
.channel-link.active i{color:var(--aqua-400)}
.channel-link.active::after{transform:scaleX(1);box-shadow:0 0 14px rgba(47,224,192,.5)}
.mobile-panel{display:none;background:rgba(6,11,22,.98);border-bottom:1px solid var(--line);padding:10px 0 16px}
.mobile-panel.open{display:block}
.mobile-panel a{display:flex;align-items:center;gap:10px;padding:13px 4px;color:var(--txt-mid);font-weight:600;border-bottom:1px solid var(--line-soft)}
.mobile-panel a.active{color:var(--aqua-400)}

/* ---------- buttons ---------- */
.btn-flare,.btn-glass{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-flare{background:var(--flare-500);color:#160A03;box-shadow:var(--glow-flare)}
.btn-flare:hover{background:#ff7f47;color:#160A03;transform:translateY(-2px);box-shadow:0 14px 38px rgba(255,107,44,.45)}
.btn-flare:active{transform:translateY(1px)}
.btn-flare.small{min-height:40px;padding:0 16px;font-size:14px}
.btn-glass{background:var(--glass);border-color:var(--line);color:var(--txt-mid);backdrop-filter:blur(14px)}
.btn-glass:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.6);background:linear-gradient(160deg,rgba(47,224,192,.14),rgba(255,255,255,.03));transform:translateY(-2px)}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--txt-hi);position:relative}
.link-arrow i{transition:transform .2s var(--ease);color:var(--aqua-400)}
.link-arrow::after{
  content:"";position:absolute;left:0;right:26px;bottom:-4px;height:1px;
  background:linear-gradient(90deg,var(--aqua-400),transparent);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;min-height:352px;display:flex;align-items:center;
  background-image:linear-gradient(100deg,rgba(4,8,18,.94) 8%,rgba(6,11,22,.72) 52%,rgba(6,11,22,.5) 100%),
                   url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:auto -10% -70% 40%;height:280px;
  background:radial-gradient(circle,rgba(30,123,255,.28),transparent 62%);filter:blur(6px);
}
.cat-hero .container{padding-top:44px;padding-bottom:44px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(47,224,192,.12);border:1px solid rgba(47,224,192,.35);color:var(--aqua-400);
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
}
.cat-hero h1{font-size:50px;margin:18px 0 14px;max-width:820px}
.cat-hero .hero-sub{font-size:17px;color:var(--txt-mid);max-width:640px}
.hero-quick{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-quick span{
  font-size:13.5px;color:var(--txt-mid);padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.hero-quick span b{color:var(--aqua-400);font-variant-numeric:tabular-nums}

/* ---------- breadcrumb + tabs ---------- */
.crumb-bar{padding:18px 0;border-bottom:1px solid var(--line-soft);background:rgba(10,20,36,.5)}
.crumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--txt-low);flex-wrap:wrap}
.crumb a{color:var(--txt-low)}
.crumb a:hover{color:var(--aqua-400)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--txt-mid)}
.tab-bar{padding:22px 0 6px}
.tabs{display:flex;gap:12px;overflow-x:auto;padding-bottom:8px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;font-size:14.5px;font-weight:600;
  background:var(--glass);border:1px solid var(--line);color:var(--txt-mid);
  backdrop-filter:blur(12px);transition:all .2s var(--ease);
}
.tab:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.5);transform:translateY(-2px)}
.tab.active{
  color:var(--aqua-400);border-color:rgba(47,224,192,.55);
  background:linear-gradient(150deg,rgba(47,224,192,.14),rgba(255,255,255,.03));
  box-shadow:var(--glow-aqua);
}

/* ---------- sections ---------- */
.section{padding:92px 0;position:relative}
.section.alt{background:linear-gradient(180deg,rgba(10,20,36,.72),rgba(6,11,22,.2));border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:42px;flex-wrap:wrap}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.12em;
  color:var(--aqua-400);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--aqua-400),transparent)}
.sec-head h2{font-size:32px}
.sec-sub{margin-top:12px;font-size:16px;color:var(--txt-mid);max-width:660px}

/* ---------- compact stream list ---------- */
.data-stream{border-top:1px solid var(--line-soft)}
.stream-row{
  display:flex;gap:22px;align-items:center;padding:20px 18px 20px 16px;position:relative;
  border-bottom:1px solid var(--line-soft);color:inherit;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.stream-row::before{
  content:"";position:absolute;left:0;top:12%;height:76%;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--aqua-400),var(--brand-400));
  opacity:0;transform:scaleY(.5);transform-origin:center;transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.stream-row:hover{background:rgba(255,255,255,.045)}
.stream-row:hover::before{opacity:1;transform:scaleY(1)}
.stream-thumb{
  flex:0 0 180px;width:180px;aspect-ratio:180/110;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-700);
}
.stream-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.stream-row:hover .stream-thumb img{transform:scale(1.05)}
.stream-body{flex:1 1 auto;min-width:0}
.stream-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.stream-body h3{font-size:19px}
.stream-body p{font-size:15px;color:var(--txt-mid);margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.stream-meta{display:flex;align-items:center;gap:22px;margin-top:12px;font-size:13px;color:var(--txt-low);flex-wrap:wrap}
.stream-meta i{color:var(--aqua-400);margin-right:5px}
.stream-go{flex:0 0 auto;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;border:1px solid var(--line);color:var(--txt-low);transition:all .2s var(--ease)}
.stream-row:hover .stream-go{color:var(--aqua-400);border-color:rgba(47,224,192,.55);transform:translateX(4px)}
.tag{
  display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.04em;
  background:rgba(47,224,192,.12);border:1px solid rgba(47,224,192,.3);color:var(--aqua-400);
}
.tag.warm{background:rgba(255,107,44,.12);border-color:rgba(255,107,44,.32);color:#ffb08a}
.tag.blue{background:rgba(30,123,255,.14);border-color:rgba(30,123,255,.34);color:var(--brand-400)}

/* ---------- feature grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature-card{
  padding:26px 24px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--sh-1);position:relative;overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.feature-card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent)}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(47,224,192,.45);box-shadow:var(--sh-2)}
.feature-icon{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(150deg,rgba(30,123,255,.28),rgba(47,224,192,.16));
  border:1px solid rgba(120,180,255,.28);color:var(--aqua-400);font-size:18px;
}
.feature-card h3{font-size:18px;margin-bottom:10px}
.feature-card p{font-size:14.8px;color:var(--txt-mid)}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{
  display:flex;gap:16px;padding:24px;border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(16,29,51,.9),rgba(10,20,36,.6));
  border:1px solid var(--line);transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.42)}
.scene-no{
  flex:0 0 auto;font-size:22px;font-weight:800;color:transparent;
  background:linear-gradient(160deg,var(--aqua-400),var(--brand-500));
  -webkit-background-clip:text;background-clip:text;font-variant-numeric:tabular-nums;
}
.scene-card h3{font-size:17px;margin-bottom:8px}
.scene-card p{font-size:14.5px;color:var(--txt-mid)}

/* ---------- stats band ---------- */
.stats-band{background:linear-gradient(180deg,rgba(4,8,18,.95),rgba(10,20,36,.85));border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);padding:66px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{padding:6px 26px;border-left:1px solid var(--line-soft);text-align:left}
.stat-item:first-child{border-left:0;padding-left:0}
.stat-num{font-size:40px;font-weight:800;color:var(--txt-hi);font-variant-numeric:tabular-nums;line-height:1.1}
.stat-num small{font-size:15px;font-weight:700;color:var(--aqua-400);margin-left:5px}
.stat-item p{margin-top:8px;font-size:14px;color:var(--txt-low)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;position:relative}
.steps::before{
  content:"";position:absolute;left:2%;right:2%;top:22px;height:2px;
  background:linear-gradient(90deg,rgba(47,224,192,.65),rgba(30,123,255,.4),transparent);
  opacity:.55;
}
.step{position:relative;padding-top:56px}
.step-dot{
  position:absolute;top:12px;left:0;width:22px;height:22px;border-radius:50%;
  background:var(--ink-900);border:2px solid var(--aqua-400);box-shadow:0 0 0 6px rgba(47,224,192,.12);
}
.step-no{font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--aqua-400);font-variant-numeric:tabular-nums}
.step h3{font-size:18px;margin:8px 0 10px}
.step p{font-size:14.6px;color:var(--txt-mid)}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:340px 1fr;gap:48px;align-items:start}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:14px;background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);overflow:hidden;transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item[open]{border-color:rgba(47,224,192,.45);background:linear-gradient(150deg,rgba(47,224,192,.08),rgba(255,255,255,.02));box-shadow:0 0 0 1px rgba(47,224,192,.18)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:19px 22px;font-size:17px;font-weight:600;color:var(--txt-hi);position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  flex:0 0 auto;width:26px;height:26px;display:grid;place-items:center;border-radius:8px;
  border:1px solid var(--line);color:var(--aqua-400);font-size:12px;transition:transform .24s var(--ease);
}
.faq-item[open] summary .plus{transform:rotate(45deg);border-color:rgba(47,224,192,.5)}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:18%;height:64%;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--aqua-400),var(--brand-500));opacity:0;transition:opacity .24s var(--ease);
}
.faq-item[open] summary::before{opacity:1}
.faq-body{padding:0 22px 20px 22px;font-size:15px;line-height:1.8;color:var(--txt-mid);animation:fadeIn .24s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- cta ---------- */
.cta-band{
  border-radius:22px;border:1px solid var(--line);overflow:hidden;position:relative;
  background-image:linear-gradient(100deg,rgba(6,11,22,.95) 10%,rgba(8,16,30,.72) 60%,rgba(6,11,22,.6)),
                   url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-inner{display:grid;grid-template-columns:1fr 420px;gap:48px;padding:54px 48px}
.cta-inner h2{font-size:30px;margin-bottom:14px}
.cta-inner .cta-desc{font-size:16px;color:var(--txt-mid);max-width:520px}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:var(--txt-mid)}
.cta-points i{color:var(--aqua-400);margin-top:6px;font-size:13px}
.form-card{
  padding:28px;border-radius:18px;background:linear-gradient(160deg,rgba(16,29,51,.92),rgba(8,14,28,.82));
  border:1px solid var(--line);backdrop-filter:blur(16px);box-shadow:var(--sh-2);
}
.form-card .form-title{font-size:18px;font-weight:800;color:var(--txt-hi);margin-bottom:6px}
.form-card .form-note{font-size:13.5px;color:var(--txt-low);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--txt-mid);margin-bottom:7px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-input);
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-hi);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--txt-low)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(47,224,192,.65);background:rgba(255,255,255,.06);
  box-shadow:0 0 0 4px rgba(47,224,192,.15);
}
.field select option{background:var(--ink-800);color:var(--txt-hi)}
.form-card .btn-flare{width:100%}
.form-card .agree{font-size:12.5px;color:var(--txt-low);margin-top:14px;text-align:center}

/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rel-card{
  display:block;padding:26px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid var(--line);backdrop-filter:blur(14px);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.rel-card:hover{transform:translateY(-5px);border-color:rgba(47,224,192,.45);box-shadow:var(--sh-2)}
.rel-card .rel-ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;background:rgba(30,123,255,.16);border:1px solid rgba(120,180,255,.3);color:var(--brand-400)}
.rel-card h3{font-size:17px;margin-bottom:8px}
.rel-card p{font-size:14.6px;color:var(--txt-mid);margin-bottom:14px}

/* ---------- footer ---------- */
.site-footer{background:#04070F;border-top:1px solid var(--line-soft);position:relative;padding-top:64px;margin-top:20px}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(47,224,192,.75),rgba(30,123,255,.6),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:46px}
.foot-brand{display:flex;align-items:center;gap:11px;color:var(--txt-hi);font-weight:800;font-size:18px;margin-bottom:16px}
.foot-brand .brand-mark{width:34px;height:34px;border-radius:10px;font-size:14px}
.foot-grid p{font-size:14.5px;color:var(--txt-low);max-width:340px}
.foot-title{font-size:15px;font-weight:700;color:var(--txt-hi);margin-bottom:16px}
.foot-links li{margin-bottom:11px}
.foot-links a{display:inline-flex;align-items:center;gap:9px;font-size:14.4px;color:var(--txt-low);transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a i{font-size:11px;color:rgba(110,134,168,.8)}
.foot-links a:hover{color:var(--aqua-400);transform:translateX(2px)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(120,180,255,.08);padding:20px 0 28px;font-size:12.5px;color:var(--txt-low);
}

/* ---------- responsive ---------- */
@media (max-width:1399.98px){
  .container{max-width:1320px}
}
@media (max-width:1199.98px){
  .container{max-width:960px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .cta-inner{grid-template-columns:1fr;padding:44px 34px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:30px 0}
  .stat-item:nth-child(3){border-left:0;padding-left:0}
  .steps{grid-template-columns:repeat(2,1fr);gap:30px}
  .steps::before{display:none}
  .cat-hero h1{font-size:42px}
}
@media (max-width:991.98px){
  .section{padding:72px 0}
  .sec-head h2{font-size:28px}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:34px}
  .brand-contact{display:none}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .container{padding:0 20px}
  .brand-row{height:64px}
  .nav-toggle{display:inline-flex}
  .channel-row{display:none}
  .section{padding:56px 0}
  .cat-hero{min-height:auto}
  .cat-hero h1{font-size:32px;margin:14px 0 12px}
  .cat-hero .hero-sub{font-size:15.6px}
  .sec-head{margin-bottom:30px;align-items:flex-start}
  .sec-head h2{font-size:24px}
  .feature-grid,.scene-grid,.rel-grid,.steps{grid-template-columns:1fr}
  .stream-row{flex-direction:column;align-items:flex-start;gap:14px;padding:18px 12px 20px 12px}
  .stream-thumb{width:100%;flex:0 0 auto;aspect-ratio:16/9}
  .stream-go{display:none}
  .stream-body h3{font-size:17.5px}
  .stats-band{padding:46px 0}
  .stat-num{font-size:32px}
  .stat-item{padding:0 20px}
  .cta-inner{padding:34px 22px}
  .cta-inner h2{font-size:24px}
  .form-card{padding:22px}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .foot-bottom{font-size:12px}
  .btn-flare,.btn-glass{min-height:48px}
}
@media (max-width:520px){
  .cat-hero h1{font-size:28px}
  .sec-head h2{font-size:22px}
  .hero-quick span{font-size:12.6px;padding:6px 12px}
  .stat-item{padding:0}
  .stat-item+.stat-item{padding-top:18px;border-top:1px solid var(--line-soft)}
  .stat-item{padding-left:0}
  .stats-grid{grid-template-columns:1fr;gap:18px}
  .stat-item:nth-child(n){border-left:0;padding-left:0}
}

/* roulang page: category4 */
:root{
  --ink-900:#060B16;
  --ink-800:#0A1424;
  --ink-700:#101D33;
  --brand-500:#1E7BFF;
  --brand-400:#4D9BFF;
  --aqua-400:#2FE0C0;
  --flare-500:#FF6B2C;
  --txt-hi:#EAF2FF;
  --txt-mid:#A8BBD6;
  --txt-low:#6E86A8;
  --line:rgba(120,180,255,.16);
  --line-soft:rgba(120,180,255,.09);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-btn:12px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 20px 44px rgba(3,10,24,.6);
  --glow-aqua:0 0 0 1px rgba(47,224,192,.45),0 10px 34px rgba(47,224,192,.28);
  --glow-flare:0 10px 30px rgba(255,107,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:#060B16;
  --bs-body-color:#A8BBD6;
  --bs-primary:#1E7BFF;
  --bs-border-radius:12px;
  --bs-border-radius-lg:18px;
  --bs-link-color:#EAF2FF;
  --bs-link-hover-color:#2FE0C0;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt-mid);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--txt-hi);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--aqua-400)}
h1,h2,h3,h4{color:var(--txt-hi);font-weight:800;letter-spacing:-.01em;margin:0;line-height:1.3}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:1320px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}
:focus-visible{outline:2px solid var(--aqua-400);outline-offset:2px;border-radius:6px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(6,11,22,.78);backdrop-filter:blur(18px) saturate(140%);border-bottom:1px solid var(--line-soft);box-shadow:var(--sh-1)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:12px;font-size:19px;font-weight:800;color:var(--txt-hi);letter-spacing:-.01em}
.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(140deg,rgba(47,224,192,.26),rgba(30,123,255,.26));border:1px solid rgba(47,224,192,.42);color:var(--aqua-400);font-size:17px;box-shadow:var(--glow-aqua)}
.brand:hover .brand-mark{transform:translateY(-1px)}
.brand-mark{transition:transform .2s var(--ease)}
.topbar-actions{display:flex;align-items:center;gap:14px}
.topbar-note{font-size:13px;color:var(--txt-low);display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.topbar-note i{color:var(--aqua-400)}
.channel-bar{background:linear-gradient(180deg,rgba(10,20,36,.94),rgba(6,11,22,.94));border-top:1px solid var(--line-soft)}
.channel-inner{display:flex;align-items:stretch;gap:4px;min-height:52px;overflow-x:auto;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{position:relative;display:inline-flex;align-items:center;gap:8px;padding:0 16px;font-size:15px;color:var(--txt-mid);white-space:nowrap;transition:color .18s var(--ease)}
.channel-link i{font-size:13px;opacity:.85}
.channel-link::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--aqua-400),var(--brand-400));opacity:0;transition:opacity .18s var(--ease)}
.channel-link:hover{color:var(--txt-hi)}
.channel-link:hover::after{opacity:.38}
.channel-link.active{color:var(--txt-hi);font-weight:600}
.channel-link.active::after{opacity:1;box-shadow:0 0 12px rgba(47,224,192,.6)}

/* ---------- buttons ---------- */
.btn-flare,.btn-glass{display:inline-flex;align-items:center;justify-content:center;gap:9px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
.btn-flare{background:linear-gradient(135deg,#FF8A4C,#FF5A17);color:#1A0A02;box-shadow:var(--glow-flare);font-weight:700}
.btn-flare:hover{color:#1A0A02;transform:translateY(-2px);box-shadow:0 14px 36px rgba(255,107,44,.45)}
.btn-flare:active{transform:translateY(0)}
.btn-glass{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--txt-hi)}
.btn-glass:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.5);background:rgba(47,224,192,.09);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--aqua-400)}
.text-link i{transition:transform .2s var(--ease)}
.text-link:hover i{transform:translateX(4px)}

/* ---------- hero ---------- */
.page-hero{position:relative;padding:56px 0 52px;min-height:340px;background-image:linear-gradient(110deg,rgba(6,11,22,.95) 12%,rgba(6,11,22,.78) 58%,rgba(6,11,22,.62)),url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;border-bottom:1px solid var(--line-soft);overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(680px 320px at 82% 18%,rgba(47,224,192,.16),transparent 68%);pointer-events:none}
.page-hero .wrap{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--txt-low);margin-bottom:22px}
.crumb a{color:var(--txt-low)}
.crumb a:hover{color:var(--aqua-400)}
.crumb i{font-size:10px;opacity:.7}
.badge-pill{display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 13px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.04em;background:rgba(47,224,192,.12);border:1px solid rgba(47,224,192,.35);color:var(--aqua-400)}
.page-hero h1{font-size:clamp(30px,4vw,50px);line-height:1.22;margin:18px 0 16px;max-width:900px}
.page-hero p{font-size:17px;max-width:720px;color:var(--txt-mid);margin:0}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:32px}
.hero-stat .hs-num{font-size:30px;font-weight:800;color:var(--txt-hi);line-height:1.2}
.hero-stat .hs-num small{font-size:13px;font-weight:600;color:var(--aqua-400);margin-left:4px}
.hero-stat .hs-txt{font-size:13px;color:var(--txt-low)}

/* ---------- channel chips ---------- */
.chip-row{display:flex;gap:12px;overflow-x:auto;padding:26px 0 4px;scrollbar-width:none}
.chip-row::-webkit-scrollbar{display:none}
.chip{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;font-size:14px;font-weight:600;white-space:nowrap;color:var(--txt-mid);background:rgba(255,255,255,.04);border:1px solid var(--line);transition:all .2s var(--ease)}
.chip:hover{color:var(--txt-hi);border-color:rgba(47,224,192,.4);transform:translateY(-2px)}
.chip.active{color:var(--aqua-400);border-color:rgba(47,224,192,.55);background:rgba(47,224,192,.1);box-shadow:var(--glow-aqua)}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section.tight{padding:72px 0}
.section.alt{background:linear-gradient(180deg,var(--ink-800),var(--ink-900));border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:14px}
.sec-head p{font-size:16px;color:var(--txt-mid);margin:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--aqua-400);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--aqua-400),transparent)}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.b-main{grid-column:span 8}
.b-side{grid-column:span 4;display:grid;grid-template-rows:1fr 1fr;gap:24px}
.b-third{grid-column:span 4}
.b-card{position:relative;display:flex;flex-direction:column;height:100%;padding:0;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);overflow:hidden;box-shadow:var(--sh-1);transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
.b-card::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);opacity:.6}
.b-card:hover{transform:translateY(-4px);border-color:rgba(47,224,192,.42);box-shadow:var(--sh-2)}
.media{position:relative;overflow:hidden;background:var(--ink-700);border-radius:var(--r-img);margin:0}
.media.ratio-16-9{aspect-ratio:16/9}
.media.ratio-21-9{aspect-ratio:21/9}
.media.ratio-4-3{aspect-ratio:4/3}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.b-card:hover .media img{transform:scale(1.05)}
.media .badge-pill{position:absolute;top:14px;left:14px;background:rgba(6,11,22,.72);backdrop-filter:blur(8px);color:var(--aqua-400)}
.b-main .media{margin:0;border-radius:0}
.b-body{padding:26px;display:flex;flex-direction:column;gap:12px;flex:1}
.b-main .b-body{padding:30px}
.b-body h3{font-size:20px}
.b-main .b-body h3{font-size:26px}
.b-body p{font-size:15px;color:var(--txt-mid);margin:0}
.b-body .text-link{margin-top:auto;padding-top:6px}
.b-small{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.b-small .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(47,224,192,.1);border:1px solid rgba(47,224,192,.3);color:var(--aqua-400);font-size:17px;margin-bottom:4px}
.b-small h3{font-size:17px}
.b-small p{font-size:14px;line-height:1.75;color:var(--txt-mid);margin:0}
.b-small .text-link{font-size:13px;margin-top:auto}

/* ---------- wide cards ---------- */
.wide-card{height:100%;padding:32px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);box-shadow:var(--sh-1);transition:border-color .22s var(--ease),transform .22s var(--ease)}
.wide-card:hover{border-color:rgba(47,224,192,.36);transform:translateY(-3px)}
.wide-card h3{font-size:20px;margin-bottom:18px;display:flex;align-items:center;gap:12px}
.wide-card h3 i{color:var(--aqua-400);font-size:16px}
.step-list{display:flex;flex-direction:column;gap:18px}
.step-item{display:flex;gap:16px;align-items:flex-start}
.step-no{flex:0 0 auto;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-size:14px;font-weight:800;color:var(--aqua-400);background:rgba(47,224,192,.1);border:1px solid rgba(47,224,192,.3)}
.step-item h4{font-size:16px;margin-bottom:4px}
.step-item p{font-size:14px;color:var(--txt-mid);margin:0;line-height:1.75}
.point-list{display:flex;flex-direction:column;gap:14px}
.point-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--txt-mid)}
.point-list li i{color:var(--aqua-400);font-size:13px;margin-top:7px}

/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rel-card{display:flex;flex-direction:column;gap:8px;padding:22px;border-radius:var(--r-card);background:rgba(255,255,255,.03);border:1px solid var(--line);transition:all .22s var(--ease)}
.rel-card i{color:var(--aqua-400);font-size:18px}
.rel-card strong{font-size:16px;color:var(--txt-hi);font-weight:700}
.rel-card span{font-size:13px;color:var(--txt-low);line-height:1.7}
.rel-card:hover{border-color:rgba(47,224,192,.45);background:rgba(47,224,192,.07);transform:translateY(-3px)}

/* ---------- faq ---------- */
.faq-acc .accordion-item{background:var(--glass);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden}
.faq-acc .accordion-item:last-child{margin-bottom:0}
.faq-acc .accordion-button{position:relative;width:100%;background:transparent;border:0;color:var(--txt-hi);font-size:17px;font-weight:600;padding:20px 56px 20px 22px;text-align:left;box-shadow:none;transition:color .2s var(--ease),background .2s var(--ease)}
.faq-acc .accordion-button::after{display:none}
.faq-acc .accordion-button .plus{position:absolute;right:20px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:8px;display:grid;place-items:center;color:var(--aqua-400);border:1px solid rgba(47,224,192,.3);background:rgba(47,224,192,.08);font-size:13px;transition:transform .24s var(--ease)}
.faq-acc .accordion-button:not(.collapsed){color:var(--aqua-400);background:rgba(47,224,192,.05)}
.faq-acc .accordion-button:not(.collapsed) .plus{transform:translateY(-50%) rotate(45deg)}
.faq-acc .accordion-button:focus{box-shadow:none}
.faq-acc .accordion-item:has(.accordion-button:not(.collapsed)){border-color:rgba(47,224,192,.4);box-shadow:var(--glow-aqua)}
.faq-acc .accordion-body{padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--txt-mid)}

/* ---------- cta ---------- */
.cta-band{position:relative;padding:64px 0;background-image:linear-gradient(120deg,rgba(6,11,22,.96),rgba(6,11,22,.86)),url('/assets/images/backpic/back-3.png');background-size:cover;background-position:center;border-top:1px solid var(--line-soft)}
.cta-panel{padding:36px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);box-shadow:var(--sh-2)}
.cta-panel h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
.cta-panel > p{font-size:15px;margin-bottom:22px}
.form-label{font-size:13px;color:var(--txt-low);margin-bottom:7px;display:block}
.form-control,.form-select{width:100%;height:48px;padding:0 14px;border-radius:var(--r-input);background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-hi);font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease)}
.form-control::placeholder{color:var(--txt-low)}
.form-control:focus,.form-select:focus{outline:none;border-color:var(--aqua-400);background:rgba(47,224,192,.06);box-shadow:0 0 0 4px rgba(47,224,192,.15)}
textarea.form-control{height:auto;min-height:110px;padding:12px 14px;line-height:1.7;resize:vertical}
.form-select option{background:#0A1424;color:var(--txt-hi)}
.contact-list{display:flex;flex-direction:column;gap:18px;margin-top:26px}
.contact-list li{display:flex;gap:14px;align-items:flex-start;font-size:15px}
.contact-list i{width:38px;height:38px;flex:0 0 auto;border-radius:11px;display:grid;place-items:center;background:rgba(47,224,192,.1);border:1px solid rgba(47,224,192,.3);color:var(--aqua-400);font-size:14px}
.contact-list b{display:block;color:var(--txt-hi);font-size:15px;font-weight:700}
.contact-list span{font-size:13px;color:var(--txt-low)}

/* ---------- footer ---------- */
.site-footer{background:#04070F;padding:64px 0 26px;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,224,192,.7),rgba(30,123,255,.5),transparent)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:800;color:var(--txt-hi);margin-bottom:16px}
.foot-brand .brand-mark{width:34px;height:34px;font-size:15px;border-radius:11px}
.site-footer p{font-size:14px;color:var(--txt-mid);line-height:1.85;margin:0;max-width:360px}
.foot-title{font-size:14px;font-weight:700;color:var(--txt-hi);margin-bottom:16px;letter-spacing:.02em}
.foot-links{display:flex;flex-direction:column;gap:11px}
.foot-links a{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:var(--txt-mid);transition:color .18s var(--ease),transform .18s var(--ease)}
.foot-links a i{font-size:11px;color:var(--txt-low);transition:color .18s var(--ease)}
.foot-links a:hover{color:var(--aqua-400);transform:translateX(2px)}
.foot-links a:hover i{color:var(--aqua-400)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:44px;padding-top:20px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--txt-low)}

/* ---------- responsive ---------- */
@media (max-width:1399px){
  .wrap{max-width:1200px}
}
@media (max-width:1199px){
  .wrap{max-width:1000px}
  .section{padding:76px 0}
  .b-main{grid-column:span 12}
  .b-side{grid-column:span 12;grid-template-rows:none;grid-template-columns:1fr 1fr}
  .b-third{grid-column:span 6}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .page-hero{padding:46px 0 44px;min-height:300px}
  .hero-stats{gap:26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .topbar-actions .topbar-note{display:none}
  .brand{font-size:17px}
  .brand-mark{width:36px;height:36px}
  .page-hero h1{font-size:30px}
  .page-hero p{font-size:15px}
  .section{padding:56px 0}
  .b-side{grid-template-columns:1fr}
  .b-third{grid-column:span 12}
  .wide-card{padding:24px}
  .cta-panel{padding:24px}
  .b-body,.b-main .b-body{padding:22px}
  .hero-stat .hs-num{font-size:24px}
  .foot-bottom{flex-direction:column;gap:8px}
}
@media (max-width:575px){
  .rel-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .btn-flare,.btn-glass{width:100%}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .chip{height:42px;padding:0 16px;font-size:13px}
}