/* roulang page: index */
:root{
  --brand:#4a5cf5;
  --brand-deep:#2a36c4;
  --mint:#17c9a5;
  --accent:#ff9f43;
  --ink:#111629;
  --ink-2:#39415c;
  --muted:#6f7893;
  --bg:#f4f6fc;
  --surface:#ffffff;
  --surface-2:#eef1fb;
  --line:#e2e7f4;
  --r-xl:26px;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --sh-sm:0 2px 8px rgba(17,22,41,.05);
  --sh-md:0 12px 30px rgba(17,22,41,.09);
  --sh-lg:0 22px 50px rgba(35,47,120,.18);
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-2);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{list-style:none;padding:0;}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(17,22,41,.08);background:rgba(255,255,255,.96);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);font-weight:800;font-size:16px;letter-spacing:.2px;text-decoration:none;}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--brand),#7d5cf6 70%);
  color:#fff;font-size:16px;font-weight:800;
  box-shadow:0 6px 16px rgba(74,92,245,.35);
}
.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center;}
.nav-link{
  display:inline-flex;align-items:center;
  padding:8px 13px;border-radius:9px;
  font-size:14px;font-weight:600;color:var(--ink-2);
  transition:background .2s ease,color .2s ease;
  white-space:nowrap;
}
.nav-link:hover{background:var(--surface-2);color:var(--brand);}
.nav-link.is-active{color:var(--brand);background:rgba(74,92,245,.1);}
.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  height:36px;padding:0 10px;
  border:1px solid var(--line);border-radius:10px;
  background:var(--bg);width:212px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(74,92,245,.12);}
.cmd-search svg{flex:0 0 auto;color:var(--muted);}
.cmd-search input{
  border:0;background:transparent;outline:none;
  font-size:13px;color:var(--ink);width:100%;height:100%;
  font-family:inherit;
}
.cmd-search input::placeholder{color:var(--muted);}
.cmd-search kbd{
  font-family:inherit;font-size:11px;color:var(--muted);
  border:1px solid var(--line);border-radius:5px;background:#fff;
  padding:1px 5px;flex:0 0 auto;
}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:3px auto;transition:transform .2s ease,opacity .2s ease;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:10px;border:1px solid transparent;
  font-size:14px;font-weight:700;line-height:1.2;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  text-decoration:none;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(74,92,245,.28);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(74,92,245,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.42);}
.btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;transform:translateY(-2px);}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(74,92,245,.4);}
.btn-outline:hover{background:rgba(74,92,245,.08);color:var(--brand-deep);transform:translateY(-2px);}
.btn-sm{padding:8px 15px;font-size:13px;border-radius:9px;}
.btn-lg{padding:14px 26px;font-size:15px;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  padding:80px 0 72px;
  background:#141a35;
}
.hero-bg{
  position:absolute;inset:0;
  background-position:center;background-size:cover;background-repeat:no-repeat;
  opacity:.32;filter:saturate(1.15);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(155deg,rgba(13,18,44,.94) 5%,rgba(34,44,110,.9) 55%,rgba(58,73,216,.82) 100%);
}
.hero-inner{position:relative;z-index:2;}
.hero-copy{max-width:880px;margin:0 auto;text-align:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);
  font-size:13px;font-weight:600;color:#e6ebff;
}
.hero-badge .pulse{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(23,201,165,.22);}
.hero h1{
  font-size:clamp(29px,4vw,44px);line-height:1.24;font-weight:800;
  letter-spacing:-.4px;margin:20px 0 18px;color:#fff;
}
.hero-lead{
  font-size:16px;line-height:1.85;color:rgba(236,240,255,.84);
  max-width:790px;margin:0 auto 30px;
}
.hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}
.hero-tags{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tags li{
  padding:6px 15px;border-radius:999px;font-size:13px;
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.07);
  color:rgba(238,242,255,.88);
}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  margin-top:44px;
}
.hero-stat{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  border-radius:16px;padding:16px 18px;text-align:left;
}
.hero-stat b{display:block;font-size:24px;font-weight:800;color:#fff;line-height:1.3;}
.hero-stat span{font-size:12.5px;color:rgba(226,232,255,.72);}
.hero-sticker{
  position:absolute;z-index:3;top:22px;right:26px;
  transform:rotate(-7deg);
  background:var(--accent);color:#26160a;
  font-weight:800;font-size:13px;line-height:1.35;
  padding:10px 16px;border-radius:12px;
  box-shadow:0 14px 28px rgba(0,0,0,.28);
  text-align:center;
}

/* ---------- sections ---------- */
.section{padding:72px 0;}
.section--alt{background:var(--bg);}
.section--tight{padding:34px 0;}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;
  background:rgba(74,92,245,.1);color:var(--brand);
  font-size:12.5px;font-weight:700;letter-spacing:.4px;
}
.kicker::before{content:"";width:14px;height:2px;border-radius:2px;background:var(--brand);}
.section h2{
  font-size:clamp(23px,2.7vw,32px);font-weight:800;color:var(--ink);
  line-height:1.32;margin:14px 0 12px;letter-spacing:-.2px;
}
.section-desc{font-size:15px;line-height:1.85;color:var(--muted);}

/* ---------- grids ---------- */
.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.m-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-sm);
  display:flex;flex-direction:column;gap:10px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.m-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#c9d3f2;}
.m-card h3{font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.5;}
.m-card p{font-size:14px;line-height:1.78;color:var(--muted);}
.card-icon{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  background:rgba(74,92,245,.1);color:var(--brand);flex:0 0 auto;
}
.card-icon.mint{background:rgba(23,201,165,.12);color:#0fa98b;}
.card-icon.amber{background:rgba(255,159,67,.14);color:#d97a10;}
.card-tag{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:4px 11px;border-radius:999px;
  background:var(--surface-2);color:var(--ink-2);
  font-size:12px;font-weight:600;
}
.card-tag.brand{background:rgba(74,92,245,.1);color:var(--brand);}
.card-tag.mint{background:rgba(23,201,165,.13);color:#0d9c80;}
.card-tag.amber{background:rgba(255,159,67,.16);color:#b96a0b;}

.thumb{border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/9;background:var(--surface-2);}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.m-card:hover .thumb img{transform:scale(1.04);}

/* ---------- promise strip ---------- */
.promise-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
}
.promise{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 18px;border-radius:var(--r-md);
  background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--sh-sm);
}
.promise svg{flex:0 0 auto;color:var(--brand);margin-top:3px;}
.promise b{display:block;font-size:14px;color:var(--ink);font-weight:700;}
.promise span{font-size:12.5px;color:var(--muted);line-height:1.65;}

/* ---------- progress ---------- */
.progress{height:8px;border-radius:999px;background:var(--surface-2);overflow:hidden;margin-top:6px;}
.progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--mint));}
.progress-label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);font-weight:600;}

/* ---------- timeline ---------- */
.timeline{border-left:2px dashed #d3dbf0;padding-left:28px;display:flex;flex-direction:column;gap:26px;}
.tl-item{position:relative;}
.tl-item::before{
  content:"";position:absolute;left:-36px;top:5px;width:13px;height:13px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(74,92,245,.14);
}
.tl-date{font-size:12.5px;font-weight:700;color:var(--brand);letter-spacing:.4px;}
.tl-item h3{font-size:16px;font-weight:700;color:var(--ink);margin:6px 0 6px;}
.tl-item p{font-size:14px;color:var(--muted);line-height:1.78;}

/* ---------- compare table ---------- */
.table-wrap{
  overflow-x:auto;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--sh-sm);
}
table.compare{width:100%;border-collapse:collapse;min-width:660px;}
table.compare th,table.compare td{padding:15px 18px;text-align:center;border-bottom:1px solid var(--line);font-size:14px;}
table.compare thead th{font-size:14.5px;font-weight:700;color:var(--ink);background:var(--surface-2);}
table.compare tbody th{text-align:left;font-weight:600;color:var(--ink-2);background:#fbfcff;}
table.compare tbody tr:last-child th,table.compare tbody tr:last-child td{border-bottom:0;}
table.compare .col-rec{background:rgba(74,92,245,.07);}
table.compare thead .col-rec{background:rgba(74,92,245,.14);color:var(--brand-deep);}
.rec-badge{
  display:inline-block;margin-left:6px;padding:2px 8px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:11px;font-weight:700;vertical-align:middle;
}
.check{color:var(--mint);font-weight:800;}
.dash{color:#c2c9dc;font-weight:700;}

/* ---------- steps ---------- */
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-sm);position:relative;
  transition:transform .2s ease,box-shadow .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-md);}
.step-num{
  width:32px;height:32px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand);color:#fff;font-weight:800;font-size:14px;
  box-shadow:0 8px 18px rgba(74,92,245,.28);margin-bottom:14px;
}
.step h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);line-height:1.78;}

/* ---------- scene ---------- */
.scene{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.scene:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:#c9d3f2;}
.scene-icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:rgba(23,201,165,.12);color:#0fa98b;flex:0 0 auto;
}
.scene h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.scene p{font-size:13.8px;color:var(--muted);line-height:1.75;}

/* ---------- quotes ---------- */
.quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-sm);display:flex;flex-direction:column;gap:12px;
}
.quote::before{
  content:"“";font-size:34px;line-height:1;color:rgba(74,92,245,.35);font-weight:800;
}
.quote p{font-size:14px;color:var(--ink-2);line-height:1.8;}
.quote footer{display:flex;align-items:center;gap:10px;margin-top:auto;}
.avatar{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(140deg,#4a5cf5,#7d5cf6);color:#fff;font-size:13px;font-weight:700;
}
.quote footer b{font-size:13.5px;color:var(--ink);font-weight:700;display:block;}
.quote footer span{font-size:12px;color:var(--muted);}

/* ---------- accordion ---------- */
.accordion details{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.accordion details:hover{border-color:#c9d3f2;box-shadow:var(--sh-sm);}
.accordion summary{
  padding:16px 20px;cursor:pointer;font-size:15px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  list-style:none;
}
.accordion summary::-webkit-details-marker{display:none;}
.accordion summary::after{content:"+";color:var(--brand);font-size:19px;font-weight:800;line-height:1;}
.accordion details[open] summary::after{content:"−";}
.accordion details p{padding:0 20px 18px;font-size:14px;color:var(--muted);line-height:1.85;}

/* ---------- channels ---------- */
.channel{
  display:flex;flex-direction:column;gap:10px;
  padding:26px;border-radius:var(--r-lg);
  background:linear-gradient(160deg,#ffffff,#f6f8ff);
  border:1px solid var(--line);box-shadow:var(--sh-sm);
  color:var(--ink);text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.channel:hover{transform:translateY(-5px);box-shadow:var(--sh-md);border-color:#bcc9f6;color:var(--ink);}
.channel .card-tag{align-self:flex-start;}
.channel h3{font-size:17px;font-weight:700;color:var(--ink);}
.channel p{font-size:14px;color:var(--muted);line-height:1.78;}
.channel .more{font-size:13.5px;font-weight:700;color:var(--brand);margin-top:auto;}

/* ---------- news ---------- */
.news-layout{display:grid;grid-template-columns:1.65fr .95fr;gap:28px;align-items:start;}
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:16px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);box-shadow:var(--sh-sm);color:inherit;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:#c9d3f2;color:inherit;}
.news-thumb{width:112px;height:80px;border-radius:10px;overflow:hidden;flex:0 0 auto;background:var(--surface-2);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body h3{font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.5;margin-bottom:6px;}
.news-body p{font-size:13.5px;color:var(--muted);line-height:1.7;}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:10px;font-size:12.5px;color:var(--muted);}
.news-meta .tag{padding:2px 9px;border-radius:999px;background:rgba(74,92,245,.1);color:var(--brand);font-weight:600;}
.side-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--sh-sm);
}
.side-panel h3{font-size:15.5px;font-weight:800;color:var(--ink);margin-bottom:6px;}
.side-panel .sub{font-size:13px;color:var(--muted);margin-bottom:10px;}
.side-item{display:block;padding:12px 0;border-bottom:1px dashed var(--line);color:inherit;}
.side-item:last-child{border-bottom:0;padding-bottom:0;}
.side-item:hover{color:var(--brand);}
.side-item b{display:block;font-size:14px;font-weight:600;color:var(--ink);line-height:1.6;}
.side-item:hover b{color:var(--brand);}
.side-item span{font-size:12px;color:var(--muted);}
.empty-note{
  padding:22px;border:1px dashed var(--line);border-radius:var(--r-md);
  background:var(--surface);color:var(--muted);font-size:14px;text-align:center;
}

/* ---------- subscribe ---------- */
.subscribe{
  background:linear-gradient(140deg,#1d2557 0%,#3341c9 60%,#4a5cf5 100%);
  border-radius:var(--r-xl);padding:46px;
  color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;
  box-shadow:var(--sh-lg);
}
.subscribe h2{color:#fff;font-size:clamp(22px,2.6vw,30px);font-weight:800;margin:12px 0 12px;line-height:1.34;}
.subscribe p{font-size:14.5px;line-height:1.85;color:rgba(232,237,255,.82);}
.subscribe .kicker{background:rgba(255,255,255,.16);color:#fff;}
.subscribe .kicker::before{background:#fff;}
.sub-form{display:flex;gap:10px;flex-wrap:wrap;}
.sub-form input{
  flex:1 1 210px;height:48px;border-radius:11px;padding:0 15px;
  border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.12);
  color:#fff;font-size:14px;font-family:inherit;outline:none;
  transition:border-color .2s ease,background .2s ease;
}
.sub-form input::placeholder{color:rgba(255,255,255,.62);}
.sub-form input:focus{border-color:#fff;background:rgba(255,255,255,.2);}
.sub-form .btn{background:#fff;color:var(--brand-deep);box-shadow:0 10px 24px rgba(0,0,0,.18);flex:0 0 auto;}
.sub-form .btn:hover{background:#f1f4ff;color:var(--brand-deep);transform:translateY(-2px);}
.form-note{font-size:12.5px;color:rgba(230,236,255,.72);margin-top:12px;line-height:1.7;}
.sub-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.sub-points li{
  font-size:12.5px;padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.2);
}

/* ---------- notice ---------- */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px 24px;border-radius:var(--r-lg);
  background:#fff8ee;border:1px solid #ffe1ba;color:#7a5312;
  font-size:14px;line-height:1.85;
}
.notice svg{flex:0 0 auto;color:#d9861b;margin-top:3px;}
.notice b{color:#5f3f08;}

/* ---------- footer ---------- */
.site-footer{background:#0f1428;color:#b6bed8;padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px;}
.footer-brand .logo-mark{box-shadow:none;}
.site-footer p{font-size:13.5px;line-height:1.85;color:#9aa3c0;}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:12px;}
.site-footer a{display:block;padding:6px 0;color:#b6bed8;font-size:14px;}
.site-footer a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding:20px 0;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:13px;color:#7f88a6;
}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .cmd-search{width:180px;}
  .nav-link{padding:8px 10px;font-size:13.5px;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .promise-bar{grid-template-columns:repeat(2,1fr);}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .news-layout{grid-template-columns:1fr;}
  .subscribe{grid-template-columns:1fr;padding:38px;}
}
@media screen and (max-width:900px){
  .nav-toggle{display:grid;}
  .cmd-search{display:none;}
  .main-nav{
    position:fixed;left:0;right:0;top:64px;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 18px 34px rgba(17,22,41,.12);
    padding:14px 20px 20px;
    transform:translateY(-12px);opacity:0;visibility:hidden;pointer-events:none;
    transition:transform .22s ease,opacity .22s ease,visibility .22s ease;
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto;}
  .nav-link{padding:12px 14px;font-size:15px;}
}
@media screen and (max-width:820px){
  .grid-3,.grid-2{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media screen and (max-width:768px){
  .section{padding:54px 0;}
  .hero{padding:60px 0 54px;}
  .hero-sticker{display:none;}
  .hero-lead{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;}
  .subscribe{padding:30px 24px;}
}
@media screen and (max-width:560px){
  .container{padding:0 18px;}
  .grid-3,.grid-2,.grid-4,.promise-bar,.hero-stats{grid-template-columns:1fr;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .news-item{flex-direction:column;}
  .news-thumb{width:100%;height:150px;}
  .logo-text{font-size:14px;}
  .btn-lg{padding:13px 20px;}
  .section-head{margin-bottom:26px;}
}

/* roulang page: article */
:root{
 --brand:#4a5cf5;
 --brand-deep:#2a36c4;
 --mint:#17c9a5;
 --accent:#ff9f43;
 --ink:#111629;
 --ink-2:#39415c;
 --muted:#6f7893;
 --bg:#f4f6fc;
 --surface:#ffffff;
 --surface-2:#eef1fb;
 --line:#e2e7f4;
 --r-xl:26px;
 --r-lg:20px;
 --r-md:14px;
 --r-sm:10px;
 --sh-sm:0 2px 8px rgba(17,22,41,.05);
 --sh-md:0 12px 30px rgba(17,22,41,.09);
 --sh-lg:0 22px 50px rgba(35,47,120,.18);
 --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink-2);
 background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
.section{padding:64px 0;}
.section--alt{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:30px;}
.section-head .eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;
 color:var(--brand);margin-bottom:12px;
}
.section-head .eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--brand),var(--mint));}
.section-head h2{font-size:clamp(22px,2.5vw,29px);line-height:1.35;font-weight:800;color:var(--ink);letter-spacing:-.3px;}
.section-head p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.85;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(255,255,255,.9);
 backdrop-filter:blur(14px);
 -webkit-backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(17,22,41,.08);background:rgba(255,255,255,.96);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);font-weight:800;font-size:16px;letter-spacing:.2px;text-decoration:none;}
.logo:hover{color:var(--ink);}
.logo-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(150deg,var(--brand),#7d5cf6 70%);
 color:#fff;font-size:16px;font-weight:800;
 box-shadow:0 6px 16px rgba(74,92,245,.35);
}
.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center;}
.nav-link{
 display:inline-flex;align-items:center;
 padding:8px 13px;border-radius:9px;
 font-size:14px;font-weight:600;color:var(--ink-2);
 transition:background .2s ease,color .2s ease;
 white-space:nowrap;
}
.nav-link:hover{background:var(--surface-2);color:var(--brand);}
.nav-link.is-active{color:var(--brand);background:rgba(74,92,245,.1);}
.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.cmd-search{
 display:flex;align-items:center;gap:8px;
 height:36px;padding:0 10px;
 border:1px solid var(--line);border-radius:10px;
 background:var(--bg);width:212px;
 transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(74,92,245,.12);}
.cmd-search svg{flex:0 0 auto;color:var(--muted);}
.cmd-search input{
 border:0;background:transparent;outline:none;
 font-size:13px;color:var(--ink);width:100%;height:100%;
 font-family:inherit;margin:0;box-shadow:none;
}
.cmd-search input::placeholder{color:var(--muted);}
.cmd-search kbd{
 font-family:inherit;font-size:11px;color:var(--muted);
 border:1px solid var(--line);border-radius:5px;background:#fff;
 padding:1px 5px;flex:0 0 auto;
}
.nav-toggle{
 display:none;width:40px;height:40px;border-radius:10px;
 border:1px solid var(--line);background:#fff;color:var(--ink);
 cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:3px auto;transition:transform .2s ease,opacity .2s ease;}
/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 20px;border-radius:10px;border:1px solid transparent;
 font-size:14px;font-weight:700;line-height:1.2;cursor:pointer;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 text-decoration:none;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(74,92,245,.28);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(74,92,245,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(74,92,245,.4);}
.btn-outline:hover{background:rgba(74,92,245,.08);color:var(--brand-deep);transform:translateY(-2px);}
.btn-sm{padding:8px 15px;font-size:13px;border-radius:9px;}
.btn-lg{padding:14px 26px;font-size:15px;}
/* ---------- article hero ---------- */
.article-hero{
 padding:40px 0 38px;
 background:linear-gradient(180deg,#f7f9ff 0%,#eef1fb 100%);
 border-bottom:1px solid var(--line);
 position:relative;
 overflow:hidden;
}
.article-hero::after{
 content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;border-radius:50%;
 background:radial-gradient(circle,rgba(74,92,245,.16),rgba(23,201,165,0) 68%);
 pointer-events:none;
}
.article-hero .container{position:relative;z-index:2;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;}
.crumb a{color:var(--muted);font-weight:600;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#c3cbe4;}
.crumb .current{color:var(--ink-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-head h1{
 font-size:clamp(26px,3.5vw,40px);line-height:1.28;letter-spacing:-.5px;
 font-weight:800;color:var(--ink);margin:16px 0 16px;max-width:920px;
}
.chip{
 display:inline-flex;align-items:center;gap:6px;
 padding:6px 14px;border-radius:999px;
 background:rgba(74,92,245,.1);color:var(--brand);
 font-size:13px;font-weight:700;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13.5px;color:var(--muted);}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#c3cbe4;}
.article-meta strong{color:var(--ink-2);font-weight:700;}
.article-summary{
 max-width:860px;margin-top:18px;font-size:15.5px;line-height:1.9;color:var(--ink-2);
 padding-left:16px;border-left:3px solid rgba(74,92,245,.32);
}
/* ---------- hero figure ---------- */
.hero-figure{position:relative;margin:0;background:#0f1533;}
.hero-figure img{width:100%;height:clamp(230px,36vw,420px);object-fit:cover;}
.hero-figure figcaption{
 position:absolute;left:0;right:0;bottom:0;
 padding:44px 24px 16px;
 font-size:13px;color:rgba(255,255,255,.82);
 background:linear-gradient(180deg,rgba(10,14,34,0),rgba(10,14,34,.82));
}
.hero-figure figcaption span{display:block;max-width:var(--max);margin:0 auto;}
/* ---------- pull quote ---------- */
.pull-band{
 background:linear-gradient(135deg,#141a35 0%,#232e70 58%,#3746d8 100%);
 color:#fff;padding:46px 0;
}
.pull-quote{
 margin:0;max-width:940px;
 padding-left:22px;border-left:4px solid var(--mint);
 font-size:clamp(16.5px,2vw,21px);line-height:1.92;font-weight:600;color:#f2f5ff;
}
.pull-quote cite{display:block;margin-top:16px;font-style:normal;font-size:13.5px;font-weight:500;color:rgba(226,233,255,.72);}
/* ---------- article layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 322px;gap:36px;align-items:start;}
.article-body{
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--r-lg);
 padding:36px 38px 30px;
 box-shadow:var(--sh-sm);
 font-size:15.5px;line-height:1.88;color:var(--ink-2);
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
 font-size:clamp(19px,2vw,23px);line-height:1.45;font-weight:800;color:var(--ink);
 margin:34px 0 14px;padding-top:6px;letter-spacing:-.2px;
}
.article-body h3{font-size:17.5px;line-height:1.5;font-weight:700;color:var(--ink);margin:26px 0 10px;}
.article-body h4{font-size:16px;font-weight:700;color:var(--ink);margin:20px 0 8px;}
.article-body p{margin:0 0 16px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:20px;}
.article-body ul li{list-style:disc;margin-bottom:8px;}
.article-body ol li{list-style:decimal;margin-bottom:8px;}
.article-body li::marker{color:var(--brand);}
.article-body strong{color:var(--ink);font-weight:800;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-deep);}
.article-body img{border-radius:var(--r-md);margin:20px 0;box-shadow:var(--sh-sm);}
.article-body blockquote{
 margin:22px 0;padding:16px 20px;border-radius:var(--r-md);
 background:var(--surface-2);border-left:4px solid var(--brand);
 color:var(--ink-2);font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-body th{background:var(--surface-2);color:var(--ink);font-weight:700;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:28px 0;}
.not-found{padding:14px 0 8px;}
.not-found h2{font-size:22px;color:var(--ink);margin:0 0 10px;}
.not-found p{margin-bottom:18px;color:var(--muted);}
/* ---------- aside ---------- */
.article-aside{position:sticky;top:84px;display:grid;gap:18px;}
.aside-card{
 background:var(--surface);border:1px solid var(--line);
 border-radius:var(--r-lg);padding:22px 22px 20px;box-shadow:var(--sh-sm);
}
.aside-card h3{font-size:15.5px;font-weight:800;color:var(--ink);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.aside-card h3 svg{color:var(--brand);}
.aside-list li{
 display:flex;gap:10px;padding:9px 0;font-size:14px;line-height:1.7;color:var(--ink-2);
 border-bottom:1px dashed var(--line);
}
.aside-list li:last-child{border-bottom:0;padding-bottom:0;}
.aside-list .num{
 flex:0 0 auto;width:20px;height:20px;border-radius:7px;
 background:rgba(74,92,245,.1);color:var(--brand);
 font-size:12px;font-weight:800;display:grid;place-items:center;margin-top:3px;
}
.aside-card--dark{
 background:linear-gradient(150deg,#1a2250,#2a36c4);
 border-color:transparent;color:rgba(238,242,255,.82);
}
.aside-card--dark h3{color:#fff;}
.aside-card--dark p{font-size:13.8px;line-height:1.8;margin-bottom:16px;}
.aside-card--dark .btn{width:100%;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
 display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
 background:var(--surface-2);color:var(--ink-2);font-size:12.5px;font-weight:600;
 border:1px solid var(--line);
}
/* ---------- tiles ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.tile{
 background:var(--surface);border:1px solid var(--line);
 border-radius:var(--r-md);padding:24px 22px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tile:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.34);}
.tile .ico{
 width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
 background:rgba(74,92,245,.1);color:var(--brand);margin-bottom:15px;
}
.tile h3{font-size:16.5px;font-weight:800;color:var(--ink);margin-bottom:8px;}
.tile p{font-size:14.3px;line-height:1.8;color:var(--muted);}
.tile .tag-row{margin-top:14px;}
/* ---------- metrics ---------- */
.metrics-band{background:#101635;color:#fff;padding:56px 0;}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:8px;}
.metric{
 border:1px solid rgba(255,255,255,.16);border-radius:var(--r-md);
 background:rgba(255,255,255,.06);padding:20px 20px 18px;
 transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.metric:hover{background:rgba(255,255,255,.1);transform:translateY(-3px);border-color:rgba(255,255,255,.3);}
.metric .val{font-size:28px;font-weight:800;letter-spacing:-.5px;color:#fff;line-height:1.2;}
.metric .val em{font-style:normal;font-size:14px;font-weight:600;color:var(--mint);margin-left:4px;}
.metric .lab{margin-top:6px;font-size:13px;color:rgba(226,233,255,.72);}
.metrics-band .section-head h2{color:#fff;}
.metrics-band .section-head p{color:rgba(226,233,255,.7);}
.metrics-band .section-head .eyebrow{color:var(--mint);}
/* ---------- checklist ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 24px;}
.check-item{
 display:flex;gap:12px;align-items:flex-start;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 padding:16px 18px;box-shadow:var(--sh-sm);
 transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.check-item:hover{border-color:rgba(23,201,165,.45);transform:translateY(-3px);box-shadow:var(--sh-md);}
.check-item .mark{
 flex:0 0 auto;width:22px;height:22px;border-radius:50%;
 background:rgba(23,201,165,.14);color:#0e9c80;display:grid;place-items:center;margin-top:2px;
}
.check-item strong{display:block;font-size:14.6px;color:var(--ink);font-weight:800;margin-bottom:3px;}
.check-item span.desc{font-size:13.6px;color:var(--muted);line-height:1.75;}
/* ---------- faq ---------- */
.faq{display:grid;gap:12px;max-width:880px;}
.faq details{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 padding:0 20px;box-shadow:var(--sh-sm);
 transition:border-color .2s ease,box-shadow .2s ease;
}
.faq details[open]{border-color:rgba(74,92,245,.36);box-shadow:var(--sh-md);}
.faq summary{
 cursor:pointer;list-style:none;padding:17px 30px 17px 0;position:relative;
 font-size:15.4px;font-weight:700;color:var(--ink);line-height:1.65;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
 content:"";position:absolute;right:2px;top:24px;width:9px;height:9px;
 border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
 transform:rotate(45deg);transition:transform .2s ease;
}
.faq details[open] summary::after{transform:rotate(-135deg);top:26px;}
.faq .answer{padding:0 0 18px;font-size:14.6px;line-height:1.86;color:var(--muted);border-top:1px dashed var(--line);padding-top:14px;}
.faq .answer strong{color:var(--ink-2);}
/* ---------- related cards ---------- */
.link-card{
 display:flex;flex-direction:column;overflow:hidden;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 box-shadow:var(--sh-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.3);}
.link-card img{width:100%;height:158px;object-fit:cover;}
.link-card .lc-body{padding:18px 20px 20px;}
.link-card h3{font-size:15.6px;font-weight:800;color:var(--ink);line-height:1.55;margin-bottom:8px;}
.link-card p{font-size:13.8px;color:var(--muted);line-height:1.78;}
.link-card .tag-row{margin-top:13px;}
/* ---------- subscribe ---------- */
.cta-band{
 padding:60px 0;
 background:linear-gradient(125deg,#141a35 0%,#2a36c4 62%,#4a5cf5 100%);
 color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
 content:"";position:absolute;left:-90px;bottom:-160px;width:380px;height:380px;border-radius:50%;
 background:radial-gradient(circle,rgba(23,201,165,.26),rgba(23,201,165,0) 70%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.35;letter-spacing:-.3px;margin-bottom:12px;}
.cta-inner p{font-size:14.8px;line-height:1.85;color:rgba(232,238,255,.82);max-width:520px;}
.sub-form{
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.24);
 border-radius:var(--r-md);padding:20px;
 display:grid;gap:12px;
}
.sub-form label{font-size:13px;font-weight:700;color:#e9eeff;}
.sub-form input[type=email]{
 width:100%;height:44px;border-radius:9px;border:1px solid rgba(255,255,255,.3);
 background:rgba(255,255,255,.95);color:var(--ink);
 padding:0 14px;font-size:14px;font-family:inherit;margin:0;box-shadow:none;
}
.sub-form input[type=email]:focus{border-color:var(--mint);box-shadow:0 0 0 3px rgba(23,201,165,.24);}
.sub-form .btn{width:100%;}
.form-hint{font-size:12.6px;color:rgba(232,238,255,.72);min-height:18px;}
/* ---------- footer ---------- */
.site-footer{background:#0d1229;color:rgba(232,238,255,.68);padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:38px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px;}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(232,238,255,.62);max-width:400px;}
.site-footer h4{color:#fff;font-size:14.5px;font-weight:800;margin:0 0 14px;letter-spacing:.2px;}
.site-footer a{display:block;color:rgba(232,238,255,.68);font-size:13.9px;padding:5px 0;transition:color .2s ease,transform .2s ease;}
.site-footer a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
 margin-top:42px;border-top:1px solid rgba(255,255,255,.12);
 padding:18px 0 22px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
 font-size:13px;color:rgba(232,238,255,.5);
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
 .header-inner{justify-content:space-between;}
 .main-nav{
  position:absolute;left:0;right:0;top:64px;
  flex-direction:column;align-items:stretch;justify-content:flex-start;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:var(--sh-md);
  padding:10px 16px 16px;gap:2px;display:none;
 }
 .main-nav.is-open{display:flex;}
 .main-nav .nav-link{padding:11px 12px;font-size:14.5px;}
 .nav-toggle{display:grid;}
 .cmd-search{display:none;}
 .article-layout{grid-template-columns:minmax(0,1fr);}
 .article-aside{position:static;grid-template-columns:repeat(2,minmax(0,1fr));}
 .grid-3{grid-template-columns:repeat(2,1fr);}
 .metrics{grid-template-columns:repeat(2,1fr);}
 .cta-inner{grid-template-columns:minmax(0,1fr);}
 .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:26px;}
}
@media (max-width:768px){
 .container{padding:0 18px;}
 .section{padding:48px 0;}
 .article-hero{padding:28px 0 30px;}
 .article-body{padding:26px 20px 20px;font-size:15px;}
 .article-aside{grid-template-columns:minmax(0,1fr);}
 .grid-3,.grid-2{grid-template-columns:minmax(0,1fr);}
 .check-list{grid-template-columns:minmax(0,1fr);}
 .pull-band{padding:36px 0;}
 .pull-quote{padding-left:16px;}
 .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px;}
 .hero-figure figcaption{padding:38px 18px 14px;font-size:12.4px;}
 .footer-bottom{flex-direction:column;gap:6px;}
}
@media (max-width:520px){
 .logo-text{font-size:14.6px;max-width:150px;overflow:hidden;text-overflow:ellipsis;}
 .btn-sm{padding:8px 12px;font-size:12.5px;}
 .article-head h1{font-size:25px;}
 .article-summary{font-size:14.6px;padding-left:12px;}
 .metrics{grid-template-columns:minmax(0,1fr);}
 .metric .val{font-size:24px;}
 .faq summary{font-size:14.6px;padding-right:26px;}
 .cta-band{padding:44px 0;}
}

/* roulang page: category1 */
:root{
 --brand:#4a5cf5;
 --brand-deep:#2a36c4;
 --mint:#17c9a5;
 --accent:#ff9f43;
 --ink:#111629;
 --ink-2:#39415c;
 --muted:#6f7893;
 --bg:#f4f6fc;
 --surface:#ffffff;
 --surface-2:#eef1fb;
 --line:#e2e7f4;
 --r-xl:26px;
 --r-lg:20px;
 --r-md:14px;
 --r-sm:10px;
 --sh-sm:0 2px 8px rgba(17,22,41,.05);
 --sh-md:0 12px 30px rgba(17,22,41,.09);
 --sh-lg:0 22px 50px rgba(35,47,120,.18);
 --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink-2);
 background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(255,255,255,.9);
 backdrop-filter:blur(14px);
 -webkit-backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(17,22,41,.08);background:rgba(255,255,255,.96);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;position:relative;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);font-weight:800;font-size:16px;letter-spacing:.2px;text-decoration:none;}
.logo:hover{color:var(--ink);}
.logo-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(150deg,var(--brand),#7d5cf6 70%);
 color:#fff;font-size:16px;font-weight:800;
 box-shadow:0 6px 16px rgba(74,92,245,.35);
}
.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center;}
.nav-link{
 display:inline-flex;align-items:center;
 padding:8px 13px;border-radius:9px;
 font-size:14px;font-weight:600;color:var(--ink-2);
 transition:background .2s ease,color .2s ease;
 white-space:nowrap;
}
.nav-link:hover{background:var(--surface-2);color:var(--brand);}
.nav-link.is-active{color:var(--brand);background:rgba(74,92,245,.1);}
.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.cmd-search{
 display:flex;align-items:center;gap:8px;
 height:36px;padding:0 10px;
 border:1px solid var(--line);border-radius:10px;
 background:var(--bg);width:212px;
 transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(74,92,245,.12);}
.cmd-search svg{flex:0 0 auto;color:var(--muted);}
.cmd-search input{
 border:0;background:transparent;outline:none;
 font-size:13px;color:var(--ink);width:100%;height:100%;
 font-family:inherit;
}
.cmd-search input::placeholder{color:var(--muted);}
.cmd-search kbd{
 font-family:inherit;font-size:11px;color:var(--muted);
 border:1px solid var(--line);border-radius:5px;background:#fff;
 padding:1px 5px;flex:0 0 auto;
}
.nav-toggle{
 display:none;width:40px;height:40px;border-radius:10px;
 border:1px solid var(--line);background:#fff;color:var(--ink);
 cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:3px auto;transition:transform .2s ease,opacity .2s ease;}
/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 20px;border-radius:10px;border:1px solid transparent;
 font-size:14px;font-weight:700;line-height:1.2;cursor:pointer;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 text-decoration:none;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(74,92,245,.28);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(74,92,245,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(74,92,245,.4);}
.btn-outline:hover{background:rgba(74,92,245,.08);color:var(--brand-deep);transform:translateY(-2px);}
.btn-sm{padding:8px 15px;font-size:13px;border-radius:9px;}
.btn-lg{padding:14px 26px;font-size:15px;}
/* ---------- page hero ---------- */
.page-hero{
 position:relative;overflow:hidden;
 padding:64px 0 60px;
 background:linear-gradient(180deg,#eef1fb 0%,#f8faff 62%,#ffffff 100%);
 border-bottom:1px solid var(--line);
}
.page-hero::before{
 content:"";position:absolute;top:-170px;right:-130px;width:480px;height:480px;border-radius:50%;
 background:radial-gradient(circle,rgba(74,92,245,.16),rgba(74,92,245,0) 70%);
}
.page-hero::after{
 content:"";position:absolute;bottom:-180px;left:-120px;width:400px;height:400px;border-radius:50%;
 background:radial-gradient(circle,rgba(23,201,165,.14),rgba(23,201,165,0) 70%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center;}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;
 background:rgba(74,92,245,.1);color:var(--brand);
 font-size:13px;font-weight:700;letter-spacing:.2px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);}
.page-hero h1{
 font-size:clamp(26px,3.5vw,40px);line-height:1.3;font-weight:800;
 letter-spacing:-.4px;color:var(--ink);margin:18px 0 16px;
}
.hero-sub{font-size:16px;line-height:1.85;color:var(--ink-2);max-width:600px;margin:0 0 24px;}
.hero-points{display:grid;gap:11px;margin-bottom:28px;}
.hero-points li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:var(--ink-2);}
.tick{flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:rgba(23,201,165,.15);position:relative;margin-top:4px;}
.tick::after{
 content:"";position:absolute;left:6px;top:6px;width:8px;height:4px;
 border-left:2px solid #0fa98b;border-bottom:2px solid #0fa98b;transform:rotate(-45deg);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.trust-bar{display:inline-flex;align-items:center;gap:9px;font-size:13px;color:var(--muted);}
.trust-bar .dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(23,201,165,.16);}
/* ---------- hero panel ---------- */
.hero-panel{
 background:var(--surface);border:1px solid var(--line);
 border-radius:var(--r-xl);box-shadow:var(--sh-lg);overflow:hidden;
}
.panel-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);}
.panel-media img{width:100%;height:100%;object-fit:cover;}
.media-chip{
 position:absolute;left:14px;top:14px;padding:5px 12px;border-radius:999px;
 background:rgba(10,15,40,.72);color:#fff;font-size:12px;font-weight:600;
 letter-spacing:.3px;backdrop-filter:blur(6px);
}
.panel-body{padding:8px 22px 18px;}
.panel-row{
 display:flex;align-items:center;justify-content:space-between;gap:14px;
 padding:13px 0;border-bottom:1px dashed var(--line);font-size:14px;
}
.panel-row:last-child{border-bottom:0;}
.panel-row span{color:var(--ink-2);font-weight:600;}
.state{
 font-size:12px;font-weight:700;padding:4px 11px;border-radius:999px;white-space:nowrap;
}
.state.is-ok{background:rgba(23,201,165,.15);color:#0d9e83;}
.state.is-wait{background:rgba(255,159,67,.18);color:#b96a12;}
.state.is-off{background:rgba(111,120,147,.14);color:#5b6480;}
.state.is-check{background:rgba(74,92,245,.12);color:var(--brand-deep);}
/* ---------- sections ---------- */
.section{padding:64px 0;}
.section--alt{background:var(--bg);}
.section--tight{padding:34px 0;background:var(--surface);border-bottom:1px solid var(--line);}
.section-head{max-width:700px;margin-bottom:34px;}
.section-head .kicker{
 display:inline-flex;align-items:center;gap:9px;
 font-size:13px;font-weight:700;color:var(--brand);
 letter-spacing:.4px;margin-bottom:10px;
}
.section-head .kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);}
.section-head h2{
 font-size:clamp(22px,2.5vw,30px);line-height:1.35;font-weight:800;
 color:var(--ink);letter-spacing:-.2px;margin-bottom:12px;
}
.section-head p{font-size:15px;line-height:1.85;color:var(--muted);}
/* ---------- metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.metric{
 background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--brand);
 border-radius:var(--r-md);padding:18px 20px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease;
}
.metric:hover{transform:translateY(-3px);box-shadow:var(--sh-md);}
.metric b{display:block;font-size:24px;font-weight:800;color:var(--ink);line-height:1.25;letter-spacing:-.4px;}
.metric span{font-size:13px;color:var(--muted);}
/* ---------- entry cards ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.entry-card{
 display:flex;flex-direction:column;gap:12px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 padding:22px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.35);}
.entry-top{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.entry-card h3{font-size:16px;font-weight:800;color:var(--ink);line-height:1.4;}
.entry-card p{font-size:14px;line-height:1.75;color:var(--ink-2);}
.entry-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px;}
.tag{
 font-size:12px;padding:4px 10px;border-radius:999px;
 background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line);
}
/* ---------- scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.scene-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 padding:26px 24px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.3);}
.scene-icon{
 width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
 background:linear-gradient(150deg,rgba(74,92,245,.14),rgba(23,201,165,.18));
 color:var(--brand-deep);margin-bottom:16px;
}
.scene-card h3{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:10px;}
.scene-card p{font-size:14px;line-height:1.8;color:var(--ink-2);}
/* ---------- flow ---------- */
.flow-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.flow-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 padding:24px 22px;box-shadow:var(--sh-sm);position:relative;
 transition:transform .2s ease,box-shadow .2s ease;
}
.flow-item:hover{transform:translateY(-4px);box-shadow:var(--sh-md);}
.flow-num{
 display:inline-grid;place-items:center;width:38px;height:38px;border-radius:12px;
 background:var(--brand);color:#fff;font-weight:800;font-size:14px;
 box-shadow:0 8px 18px rgba(74,92,245,.3);margin-bottom:16px;
}
.flow-item h3{font-size:15.5px;font-weight:800;color:var(--ink);margin-bottom:9px;}
.flow-item p{font-size:14px;line-height:1.78;color:var(--ink-2);}
/* ---------- legend ---------- */
.legend-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start;}
.legend-list{display:grid;gap:14px;}
.legend-item{
 display:flex;gap:16px;align-items:flex-start;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 padding:18px 20px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease;
}
.legend-item:hover{transform:translateY(-3px);box-shadow:var(--sh-md);}
.legend-item h3{font-size:15px;font-weight:800;color:var(--ink);margin-bottom:6px;}
.legend-item p{font-size:13.5px;line-height:1.75;color:var(--ink-2);}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:920px;}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 box-shadow:var(--sh-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(74,92,245,.35);box-shadow:var(--sh-md);}
.faq-item summary{
 cursor:pointer;padding:18px 22px;font-size:15px;font-weight:700;color:var(--ink);
 list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";font-size:19px;font-weight:700;color:var(--brand);line-height:1;
 transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"−";}
.faq-body{padding:0 22px 20px;font-size:14.5px;line-height:1.85;color:var(--ink-2);}
/* ---------- cta ---------- */
.cta-band{
 position:relative;overflow:hidden;
 background:linear-gradient(135deg,#1b2350 0%,#2f3cc0 58%,#4a5cf5 100%);
 border-radius:var(--r-xl);padding:44px;
 color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;
 box-shadow:var(--sh-lg);
}
.cta-band::after{
 content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
 background:rgba(255,255,255,.07);
}
.cta-copy{position:relative;z-index:2;}
.cta-copy h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;line-height:1.4;margin-bottom:12px;color:#fff;}
.cta-copy p{font-size:14.5px;line-height:1.85;color:rgba(232,238,255,.82);margin:0;}
.sub-form{position:relative;z-index:2;display:flex;gap:10px;flex-wrap:wrap;}
.sub-form input{
 flex:1 1 200px;height:48px;padding:0 16px;border-radius:10px;
 border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.12);
 color:#fff;font-size:14px;font-family:inherit;outline:none;
 transition:border-color .2s ease,background .2s ease;
}
.sub-form input::placeholder{color:rgba(232,238,255,.62);}
.sub-form input:focus{border-color:#fff;background:rgba(255,255,255,.2);}
.sub-form .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 10px 24px rgba(8,14,48,.28);}
.sub-form .btn-primary:hover{background:#eef1ff;color:var(--brand-deep);}
.sub-tip{position:relative;z-index:2;margin-top:12px;font-size:13px;color:rgba(232,238,255,.7);}
/* ---------- footer ---------- */
.site-footer{background:#0e1330;color:rgba(226,231,250,.72);padding-top:56px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:42px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:16px;}
.site-footer .logo-mark{width:30px;height:30px;font-size:14px;border-radius:9px;box-shadow:none;}
.site-footer h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.3px;margin-bottom:14px;}
.site-footer a{display:block;color:rgba(226,231,250,.72);font-size:14px;padding:5px 0;transition:color .2s ease,transform .2s ease;}
.site-footer a:hover{color:#fff;transform:translateX(2px);}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(226,231,250,.66);max-width:370px;}
.footer-bottom{
 display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
 border-top:1px solid rgba(255,255,255,.1);padding:18px 0 26px;
 font-size:13px;color:rgba(226,231,250,.5);
}
/* ---------- responsive ---------- */
@media (max-width:1023px){
 .header-inner{gap:14px;}
 .cmd-search{display:none;}
 .main-nav{
  position:absolute;top:64px;left:0;right:0;
  display:none;flex-direction:column;align-items:stretch;gap:2px;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 18px 34px rgba(17,22,41,.14);
  padding:10px 16px 18px;
 }
 .main-nav.is-open{display:flex;}
 .nav-link{padding:12px 14px;font-size:15px;}
 .nav-toggle{display:grid;}
 .hero-grid{grid-template-columns:1fr;gap:34px;}
 .hero-panel{max-width:580px;}
 .metrics{grid-template-columns:repeat(2,1fr);}
 .entry-grid,.scene-grid{grid-template-columns:repeat(2,1fr);}
 .flow-list{grid-template-columns:repeat(2,1fr);}
 .legend-wrap{grid-template-columns:1fr;gap:28px;}
 .cta-band{grid-template-columns:1fr;padding:34px;}
 .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
 .section{padding:46px 0;}
 .page-hero{padding:48px 0 44px;}
 .entry-grid,.scene-grid,.flow-list{grid-template-columns:1fr;}
 .hero-actions .btn{width:100%;}
 .hero-sub{font-size:15px;}
 .panel-body{padding:6px 18px 16px;}
 .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:32px;}
 .footer-bottom{flex-direction:column;align-items:flex-start;}
 .cta-band{padding:28px 22px;}
}
@media (max-width:519px){
 .container{padding:0 16px;}
 .metrics{grid-template-columns:1fr;}
 .logo-text{font-size:14.5px;}
 .logo-mark{width:30px;height:30px;font-size:15px;border-radius:10px;}
 .header-tools .btn-sm{padding:7px 12px;font-size:12px;}
 .page-hero h1{margin:16px 0 14px;}
 .entry-card,.scene-card,.flow-item{padding:20px;}
 .faq-item summary{padding:16px 18px;font-size:14.5px;}
 .faq-body{padding:0 18px 18px;}
 .sub-form input{flex:1 1 100%;}
 .sub-form .btn-primary{width:100%;}
}

/* roulang page: category2 */
:root{
 --brand:#4a5cf5;
 --brand-deep:#2a36c4;
 --mint:#17c9a5;
 --accent:#ff9f43;
 --ink:#111629;
 --ink-2:#39415c;
 --muted:#6f7893;
 --bg:#f4f6fc;
 --surface:#ffffff;
 --surface-2:#eef1fb;
 --line:#e2e7f4;
 --r-xl:26px;
 --r-lg:20px;
 --r-md:14px;
 --r-sm:10px;
 --sh-sm:0 2px 8px rgba(17,22,41,.05);
 --sh-md:0 12px 30px rgba(17,22,41,.09);
 --sh-lg:0 22px 50px rgba(35,47,120,.18);
 --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink-2);
 background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);font-weight:800;letter-spacing:-.2px;margin:0;}
p{margin:0 0 12px;}
ul{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(255,255,255,.9);
 backdrop-filter:blur(14px);
 -webkit-backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(17,22,41,.08);background:rgba(255,255,255,.96);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);font-weight:800;font-size:16px;letter-spacing:.2px;text-decoration:none;}
.logo:hover{color:var(--ink);}
.logo-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(150deg,var(--brand),#7d5cf6 70%);
 color:#fff;font-size:16px;font-weight:800;
 box-shadow:0 6px 16px rgba(74,92,245,.35);
}
.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center;}
.nav-link{
 display:inline-flex;align-items:center;
 padding:8px 13px;border-radius:9px;
 font-size:14px;font-weight:600;color:var(--ink-2);
 transition:background .2s ease,color .2s ease;
 white-space:nowrap;
}
.nav-link:hover{background:var(--surface-2);color:var(--brand);}
.nav-link.is-active{color:var(--brand);background:rgba(74,92,245,.1);}
.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.cmd-search{
 display:flex;align-items:center;gap:8px;
 height:36px;padding:0 10px;
 border:1px solid var(--line);border-radius:10px;
 background:var(--bg);width:212px;
 transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(74,92,245,.12);}
.cmd-search svg{flex:0 0 auto;color:var(--muted);}
.cmd-search input{
 border:0;background:transparent;outline:none;
 font-size:13px;color:var(--ink);width:100%;height:100%;
 font-family:inherit;
}
.cmd-search input::placeholder{color:var(--muted);}
.cmd-search kbd{
 font-family:inherit;font-size:11px;color:var(--muted);
 border:1px solid var(--line);border-radius:5px;background:#fff;
 padding:1px 5px;flex:0 0 auto;
}
.nav-toggle{
 display:none;width:40px;height:40px;border-radius:10px;
 border:1px solid var(--line);background:#fff;color:var(--ink);
 cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:3px auto;transition:transform .2s ease,opacity .2s ease;}
/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 20px;border-radius:10px;border:1px solid transparent;
 font-size:14px;font-weight:700;line-height:1.2;cursor:pointer;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 text-decoration:none;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(74,92,245,.28);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(74,92,245,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.42);}
.btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;transform:translateY(-2px);}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(74,92,245,.4);}
.btn-outline:hover{background:rgba(74,92,245,.08);color:var(--brand-deep);transform:translateY(-2px);}
.btn-sm{padding:8px 15px;font-size:13px;border-radius:9px;}
.btn-lg{padding:14px 26px;font-size:15px;}
/* ---------- hero ---------- */
.hero--rules{
 position:relative;overflow:hidden;color:#fff;
 padding:64px 0 60px;background:#141a35;
}
.hero-bg{
 position:absolute;inset:0;
 background-position:center;background-size:cover;background-repeat:no-repeat;
 opacity:.3;filter:saturate(1.1);
}
.hero--rules::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(155deg,rgba(13,18,44,.95) 5%,rgba(34,44,110,.9) 55%,rgba(58,73,216,.8) 100%);
}
.hero-inner{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center;}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;
 padding:7px 15px;border-radius:999px;
 background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);
 font-size:13px;font-weight:600;color:#e6ebff;
}
.hero-badge .pulse{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(23,201,165,.22);}
.hero--rules h1{
 font-size:clamp(28px,3.6vw,40px);line-height:1.26;font-weight:800;
 letter-spacing:-.4px;margin:18px 0 16px;color:#fff;
}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(236,240,255,.84);max-width:600px;margin:0 0 26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tags li{
 padding:6px 15px;border-radius:999px;font-size:13px;
 border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.07);
 color:rgba(238,242,255,.88);
}
.hero-compare{display:grid;gap:14px;}
.ba-card{
 background:rgba(255,255,255,.09);
 border:1px solid rgba(255,255,255,.2);
 border-radius:18px;padding:18px 20px;
 backdrop-filter:blur(8px);
 -webkit-backdrop-filter:blur(8px);
 box-shadow:0 16px 36px rgba(6,10,32,.28);
}
.ba-card h3{font-size:15px;color:#fff;margin:0 0 10px;display:flex;align-items:center;gap:9px;}
.ba-dot{width:9px;height:9px;border-radius:50%;background:#ff7a7a;flex:0 0 auto;}
.ba-after{border-color:rgba(23,201,165,.5);background:rgba(23,201,165,.12);}
.ba-after .ba-dot{background:var(--mint);box-shadow:0 0 0 4px rgba(23,201,165,.2);}
.ba-list li{
 position:relative;padding-left:16px;font-size:13.5px;line-height:1.7;
 color:rgba(233,238,255,.82);margin-bottom:7px;
}
.ba-list li:last-child{margin-bottom:0;}
.ba-list li::before{
 content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;
 background:rgba(255,255,255,.5);
}
.ba-after .ba-list li::before{background:rgba(23,201,165,.9);}
/* ---------- section ---------- */
.section{padding:76px 0;}
.section--alt{background:var(--bg);}
.section--deep{background:#141a35;color:rgba(238,242,255,.86);}
.section-head{max-width:760px;margin:0 0 38px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
 display:inline-flex;align-items:center;gap:9px;
 font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
 color:var(--brand);margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--mint));}
.section--deep .eyebrow{color:#9fb0ff;}
.section--deep .eyebrow::before{background:linear-gradient(90deg,#9fb0ff,var(--mint));}
.section-head h2{font-size:clamp(23px,2.6vw,30px);line-height:1.35;}
.section-head p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.85;}
.section--deep .section-head p{color:rgba(226,232,255,.72);}
.section--deep .section-head h2{color:#fff;}
/* ---------- cards ---------- */
.card-grid{display:grid;gap:20px;}
.cols-2{grid-template-columns:repeat(2,1fr);}
.cols-3{grid-template-columns:repeat(3,1fr);}
.cols-4{grid-template-columns:repeat(4,1fr);}
.info-card{
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--r-lg);
 padding:24px 22px;
 box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
 height:100%;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#cfd8f4;}
.icon-badge{
 width:44px;height:44px;border-radius:13px;
 display:grid;place-items:center;margin-bottom:16px;
 background:linear-gradient(150deg,rgba(74,92,245,.14),rgba(23,201,165,.16));
 color:var(--brand);
}
.info-card h3{font-size:16.5px;margin-bottom:9px;}
.info-card p{font-size:14px;line-height:1.8;color:var(--muted);margin:0;}
.tag{
 display:inline-flex;align-items:center;
 padding:4px 11px;border-radius:999px;
 font-size:12px;font-weight:600;
 background:rgba(74,92,245,.1);color:var(--brand-deep);
 border:1px solid rgba(74,92,245,.16);
}
.tag-mint{background:rgba(23,201,165,.12);color:#0d8f76;border-color:rgba(23,201,165,.2);}
.tag-accent{background:rgba(255,159,67,.14);color:#b96a15;border-color:rgba(255,159,67,.24);}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step;}
.step{
 position:relative;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--r-lg);padding:24px 22px 22px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#cfd8f4;}
.step-num{
 width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
 font-size:14px;font-weight:800;color:#fff;margin-bottom:14px;
 background:linear-gradient(150deg,var(--brand),#7d5cf6);
 box-shadow:0 8px 18px rgba(74,92,245,.28);
}
.step h3{font-size:15.5px;margin-bottom:8px;}
.step p{font-size:13.5px;color:var(--muted);line-height:1.8;margin:0;}
/* ---------- stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:34px;}
.stat-card{
 background:rgba(255,255,255,.07);
 border:1px solid rgba(255,255,255,.16);
 border-radius:var(--r-lg);padding:20px 22px;
}
.stat-card .num{font-size:28px;font-weight:800;color:#fff;line-height:1.2;letter-spacing:-.5px;}
.stat-card .num span{font-size:14px;font-weight:700;color:var(--mint);margin-left:4px;}
.stat-card .desc{font-size:13px;color:rgba(226,232,255,.7);margin-top:8px;}
.sheet-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;}
.sheet-media{border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sh-lg);border:1px solid rgba(255,255,255,.18);}
.sheet-media img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.rule-list li{
 display:flex;gap:14px;align-items:flex-start;
 padding:14px 0;border-bottom:1px dashed rgba(255,255,255,.16);
}
.rule-list li:last-child{border-bottom:0;}
.rule-list .k{
 flex:0 0 92px;font-size:13px;font-weight:700;color:#9fb0ff;
}
.rule-list .v{font-size:14px;color:rgba(233,238,255,.85);line-height:1.75;}
/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.compare-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 padding:0;overflow:hidden;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#cfd8f4;}
.compare-row{padding:18px 22px;}
.compare-row.old{background:#fbfcff;border-bottom:1px solid var(--line);}
.compare-row.now{background:linear-gradient(180deg,rgba(23,201,165,.08),rgba(74,92,245,.05));}
.compare-label{
 display:inline-flex;align-items:center;gap:7px;
 font-size:12px;font-weight:700;letter-spacing:.06em;margin-bottom:8px;
 color:var(--muted);
}
.compare-row.now .compare-label{color:#0d8f76;}
.compare-row p{font-size:14px;line-height:1.78;margin:0;color:var(--ink-2);}
/* ---------- channels ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.channel-card{
 display:block;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.4);}
.channel-card h3{font-size:17px;margin-bottom:9px;color:var(--ink);}
.channel-card p{font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 14px;}
.channel-card .go{font-size:13.5px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.channel-card:hover .go{color:var(--brand-deep);}
.channel-card.is-current{border-color:rgba(23,201,165,.45);background:linear-gradient(180deg,rgba(23,201,165,.07),#fff);}
/* ---------- posts ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.post-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 overflow:hidden;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
 display:flex;flex-direction:column;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#cfd8f4;}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);flex-wrap:wrap;}
.post-body h3{font-size:15.5px;line-height:1.55;}
.post-body h3 a{color:var(--ink);}
.post-body h3 a:hover{color:var(--brand);}
.post-body p{font-size:13.5px;color:var(--muted);line-height:1.75;margin:0;}
.list-empty{
 padding:36px 24px;text-align:center;color:var(--muted);font-size:14px;
 background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-lg);
}
/* ---------- faq ---------- */
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:12px;}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 box-shadow:var(--sh-sm);overflow:hidden;
 transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#cfd8f4;}
.faq-item[open]{border-color:rgba(74,92,245,.38);box-shadow:var(--sh-md);}
.faq-item summary{
 cursor:pointer;list-style:none;padding:18px 22px;
 font-size:15px;font-weight:700;color:var(--ink);
 display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";font-size:19px;font-weight:600;color:var(--brand);
 transition:transform .2s ease;line-height:1;
}
.faq-item[open] summary::after{content:"–";}
.faq-item .faq-a{padding:0 22px 20px;font-size:14px;line-height:1.85;color:var(--muted);}
/* ---------- cta ---------- */
.cta-band{
 background:linear-gradient(135deg,#24306e 0%,#3c48c9 55%,#5b6bf0 100%);
 border-radius:var(--r-xl);
 padding:48px 44px;color:#fff;
 display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;
 box-shadow:var(--sh-lg);position:relative;overflow:hidden;
}
.cta-band::before{
 content:"";position:absolute;width:320px;height:320px;border-radius:50%;
 right:-90px;top:-120px;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 70%);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,28px);margin-bottom:12px;}
.cta-band p{color:rgba(232,238,255,.86);font-size:14.5px;line-height:1.85;margin:0;}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:2;}
.subscribe-form input[type="email"]{
 flex:1 1 210px;min-width:0;height:48px;border-radius:11px;border:1px solid rgba(255,255,255,.28);
 background:rgba(255,255,255,.14);color:#fff;padding:0 16px;font-size:14px;outline:none;
 transition:border-color .2s ease,background .2s ease;
}
.subscribe-form input[type="email"]::placeholder{color:rgba(232,238,255,.65);}
.subscribe-form input[type="email"]:focus{border-color:#fff;background:rgba(255,255,255,.22);}
.subscribe-form .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 10px 24px rgba(10,16,48,.28);}
.subscribe-form .btn-primary:hover{background:#eef1ff;color:var(--brand-deep);}
.form-hint{font-size:12.5px;color:rgba(232,238,255,.68);margin-top:10px;position:relative;z-index:2;}
/* ---------- footer ---------- */
.site-footer{background:#101532;color:rgba(226,232,255,.72);padding:56px 0 26px;margin-top:0;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px;}
.site-footer p{font-size:13.5px;line-height:1.85;color:rgba(226,232,255,.66);margin:0;}
.site-footer h4{font-size:14px;color:#fff;margin:0 0 14px;letter-spacing:.02em;}
.site-footer a{display:block;color:rgba(226,232,255,.72);font-size:13.5px;padding:5px 0;transition:color .2s ease,transform .2s ease;}
.site-footer a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:rgba(226,232,255,.5);}
/* ---------- responsive ---------- */
@media (max-width:1024px){
 .cmd-search{width:168px;}
 .nav-link{padding:8px 10px;font-size:13px;}
 .hero-grid{grid-template-columns:1fr;gap:32px;}
 .hero-lead{max-width:none;}
 .sheet-wrap{grid-template-columns:1fr;gap:26px;}
 .cols-4{grid-template-columns:repeat(2,1fr);}
 .steps{grid-template-columns:repeat(2,1fr);}
 .stat-grid{grid-template-columns:repeat(2,1fr);}
 .compare-grid,.channel-grid,.post-grid{grid-template-columns:repeat(2,1fr);}
 .cta-band{grid-template-columns:1fr;padding:38px 30px;}
}
@media (max-width:860px){
 .main-nav{
  display:none;position:absolute;left:0;right:0;top:64px;
  flex-direction:column;align-items:stretch;gap:4px;
  background:#fff;border-bottom:1px solid var(--line);
  padding:12px 16px 16px;box-shadow:0 18px 34px rgba(17,22,41,.12);
 }
 .main-nav.is-open{display:flex;}
 .nav-link{padding:11px 14px;font-size:14px;}
 .nav-toggle{display:grid;}
 .cmd-search{display:none;}
 .header-inner{gap:12px;}
 .logo-text{font-size:15px;}
}
@media (max-width:760px){
 .section{padding:56px 0;}
 .cols-3,.cols-4{grid-template-columns:1fr;}
 .compare-grid,.channel-grid,.post-grid{grid-template-columns:1fr;}
 .stat-grid{grid-template-columns:repeat(2,1fr);}
 .footer-grid{grid-template-columns:1fr;gap:26px;}
 .hero--rules{padding:48px 0 44px;}
}
@media (max-width:520px){
 .container{padding:0 18px;}
 .header-inner{height:60px;}
 .logo-mark{width:30px;height:30px;font-size:15px;border-radius:9px;}
 .logo-text{font-size:14px;}
 .hero h1,.hero--rules h1{font-size:26px;}
 .hero-actions .btn{width:100%;}
 .steps{grid-template-columns:1fr;}
 .stat-grid{grid-template-columns:1fr;}
 .cta-band{padding:30px 22px;border-radius:20px;}
 .subscribe-form input[type="email"]{flex:1 1 100%;}
 .subscribe-form .btn{width:100%;}
 .faq-item summary{padding:15px 16px;font-size:14px;}
 .faq-item .faq-a{padding:0 16px 18px;}
 .info-card{padding:20px 18px;}
}

/* roulang page: category3 */
:root{
 --brand:#4a5cf5;
 --brand-deep:#2a36c4;
 --mint:#17c9a5;
 --accent:#ff9f43;
 --ink:#111629;
 --ink-2:#39415c;
 --muted:#6f7893;
 --bg:#f4f6fc;
 --surface:#ffffff;
 --surface-2:#eef1fb;
 --line:#e2e7f4;
 --r-xl:26px;
 --r-lg:20px;
 --r-md:14px;
 --r-sm:10px;
 --sh-sm:0 2px 8px rgba(17,22,41,.05);
 --sh-md:0 12px 30px rgba(17,22,41,.09);
 --sh-lg:0 22px 50px rgba(35,47,120,.18);
 --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
 font-size:16px;line-height:1.78;color:var(--ink-2);background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:800;line-height:1.3;letter-spacing:-.2px;}
p{margin:0 0 14px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(255,255,255,.9);
 backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(17,22,41,.08);background:rgba(255,255,255,.97);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);font-weight:800;font-size:16px;text-decoration:none;}
.logo:hover{color:var(--ink);}
.logo-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(150deg,var(--brand),#7d5cf6 70%);
 color:#fff;font-size:16px;font-weight:800;flex:0 0 auto;
 box-shadow:0 6px 16px rgba(74,92,245,.35);
}
.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center;}
.nav-link{
 display:inline-flex;align-items:center;padding:8px 13px;border-radius:9px;
 font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap;
 transition:background .2s ease,color .2s ease;
}
.nav-link:hover{background:var(--surface-2);color:var(--brand);}
.nav-link.is-active{color:var(--brand);background:rgba(74,92,245,.1);}
.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.cmd-search{
 display:flex;align-items:center;gap:8px;height:36px;padding:0 10px;
 border:1px solid var(--line);border-radius:10px;background:var(--bg);width:212px;
 transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(74,92,245,.12);}
.cmd-search svg{flex:0 0 auto;color:var(--muted);}
.cmd-search input{border:0;background:transparent;outline:none;font-size:13px;color:var(--ink);width:100%;height:100%;font-family:inherit;}
.cmd-search input::placeholder{color:var(--muted);}
.cmd-search kbd{font-family:inherit;font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:5px;background:#fff;padding:1px 5px;flex:0 0 auto;}
.nav-toggle{
 display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
 background:#fff;color:var(--ink);cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:3px auto;transition:transform .2s ease,opacity .2s ease;}
/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 20px;border-radius:10px;border:1px solid transparent;
 font-size:14px;font-weight:700;line-height:1.2;cursor:pointer;text-decoration:none;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(74,92,245,.28);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(74,92,245,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.42);}
.btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px);}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(74,92,245,.4);}
.btn-outline:hover{background:rgba(74,92,245,.08);color:var(--brand-deep);transform:translateY(-2px);}
.btn-sm{padding:8px 15px;font-size:13px;border-radius:9px;}
.btn-lg{padding:14px 26px;font-size:15px;}
/* ---------- hero ---------- */
.cat-hero{position:relative;overflow:hidden;color:#fff;padding:72px 0 66px;background:#141a35;}
.cat-hero .hero-bg{position:absolute;inset:0;background-position:center;background-size:cover;background-repeat:no-repeat;opacity:.3;filter:saturate(1.15);}
.cat-hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(150deg,rgba(13,18,44,.95) 4%,rgba(33,43,110,.92) 56%,rgba(60,74,214,.84) 100%);
}
.cat-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .85fr;gap:44px;align-items:center;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(226,232,255,.62);margin-bottom:16px;}
.crumb a{color:rgba(226,232,255,.72);}
.crumb a:hover{color:#fff;}
.crumb span{opacity:.5;}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
 background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);
 font-size:13px;font-weight:600;color:#e6ebff;
}
.hero-badge .pulse{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(23,201,165,.22);}
.cat-hero h1{font-size:clamp(27px,3.6vw,42px);line-height:1.26;color:#fff;margin:18px 0 16px;}
.cat-hero .hero-lead{font-size:15.5px;line-height:1.86;color:rgba(236,240,255,.84);max-width:640px;margin-bottom:22px;}
.hero-points{display:grid;gap:10px;margin-bottom:28px;}
.hero-points li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:rgba(236,240,255,.88);}
.hero-points li svg{flex:0 0 auto;margin-top:4px;color:var(--mint);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);}
.hero-trust span{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:rgba(226,232,255,.72);}
.hero-trust i{width:5px;height:5px;border-radius:50%;background:var(--mint);display:inline-block;}
.hero-panel{
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.2);
 border-radius:var(--r-xl);padding:24px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
 box-shadow:0 26px 60px rgba(6,10,32,.34);
}
.hero-panel h2{font-size:15px;color:#fff;letter-spacing:.4px;margin-bottom:6px;}
.hero-panel .panel-sub{font-size:12.5px;color:rgba(226,232,255,.62);margin-bottom:18px;}
.panel-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.16);}
.panel-row:last-of-type{border-bottom:0;}
.panel-row .k{font-size:13px;color:rgba(226,232,255,.74);}
.panel-row .v{font-size:13.5px;font-weight:700;color:#fff;}
.tag{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;}
.tag-mint{background:rgba(23,201,165,.16);color:#6ff0d8;}
.tag-amber{background:rgba(255,159,67,.18);color:#ffcb92;}
.tag-blue{background:rgba(74,92,245,.16);color:#a9b4ff;}
.panel-cta{display:block;margin-top:18px;text-align:center;font-size:13px;font-weight:700;color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);border-radius:10px;padding:10px;}
.panel-cta:hover{background:rgba(255,255,255,.24);color:#fff;}
/* ---------- sections ---------- */
.section{padding:72px 0;}
.section-alt{background:var(--bg);}
.section-dark{background:#101733;color:rgba(226,232,255,.8);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:34px;}
.section-head .head-main{max-width:640px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:1.4px;color:var(--brand);text-transform:uppercase;margin-bottom:10px;}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);display:inline-block;}
.section-head h2{font-size:clamp(21px,2.4vw,28px);}
.section-head .head-note{font-size:14px;color:var(--muted);max-width:330px;line-height:1.8;}
.section-dark .eyebrow{color:#8fa0ff;}
.section-dark .eyebrow::before{background:#8fa0ff;}
.section-dark h2,.section-dark h3{color:#fff;}
.section-dark .head-note{color:rgba(226,232,255,.62);}
/* ---------- stat strip ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.stat-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 padding:22px 22px 20px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.32);}
.stat-card .num{font-size:30px;font-weight:800;color:var(--ink);line-height:1.1;letter-spacing:-1px;}
.stat-card .num small{font-size:14px;font-weight:700;color:var(--brand);margin-left:2px;}
.stat-card .lbl{margin-top:8px;font-size:13.5px;font-weight:700;color:var(--ink-2);}
.stat-card .dsc{margin-top:4px;font-size:12.5px;color:var(--muted);line-height:1.7;}
/* ---------- diff cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 box-shadow:var(--sh-sm);overflow:hidden;display:flex;flex-direction:column;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.34);}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:16.5px;}
.card-body p{font-size:13.8px;color:var(--mutED);color:var(--muted);line-height:1.75;margin:0;}
.card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px;}
.chip{display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line);}
.chip-solid{background:rgba(74,92,245,.1);color:var(--brand);border-color:rgba(74,92,245,.22);}
.chip-mint{background:rgba(23,201,165,.12);color:#0d9d80;border-color:rgba(23,201,165,.24);}
/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:flowstep;}
.flow-item{
 position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 padding:24px 20px 22px;box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease;
}
.flow-item:hover{transform:translateY(-3px);box-shadow:var(--sh-md);}
.flow-item .step{
 font-size:12px;font-weight:800;letter-spacing:1px;color:#fff;
 width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
 background:linear-gradient(145deg,var(--brand),#7d5cf6);margin-bottom:14px;
}
.flow-item h3{font-size:15.5px;margin-bottom:8px;}
.flow-item p{font-size:13.5px;color:var(--muted);line-height:1.75;margin:0;}
/* ---------- compare ---------- */
.compare{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
 overflow:hidden;box-shadow:var(--sh-sm);
}
.compare-head,.compare-row{display:grid;grid-template-columns:.9fr 1fr 1fr 1.15fr;gap:14px;padding:16px 22px;align-items:center;}
.compare-head{background:var(--surface-2);font-size:12.5px;font-weight:800;letter-spacing:.6px;color:var(--ink);text-transform:uppercase;}
.compare-row{border-top:1px solid var(--line);font-size:13.8px;color:var(--ink-2);transition:background .2s ease;}
.compare-row:hover{background:#fafbff;}
.compare-row .item{font-weight:700;color:var(--ink);}
.compare-row .old{color:var(--muted);text-decoration:line-through;text-decoration-color:rgba(111,120,147,.5);}
.compare-row .new{color:var(--brand-deep);font-weight:700;}
.compare-row .impact{font-size:13px;}
.badge-strong{display:inline-flex;align-items:center;gap:5px;padding:2px 9px;border-radius:6px;font-size:11.5px;font-weight:700;background:rgba(255,159,67,.16);color:#b4650f;}
.badge-mid{background:rgba(74,92,245,.12);color:var(--brand-deep);}
.badge-low{background:rgba(23,201,165,.14);color:#0b8f74;}
/* ---------- voices ---------- */
.voice{
 background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-lg);
 padding:24px;display:flex;flex-direction:column;gap:14px;transition:transform .2s ease,border-color .2s ease,background .2s ease;
}
.voice:hover{transform:translateY(-3px);background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.26);}
.voice p{font-size:14px;line-height:1.85;color:rgba(232,238,255,.86);margin:0;}
.voice .who{display:flex;align-items:center;gap:10px;margin-top:auto;}
.voice .ava{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-size:13px;font-weight:800;color:#fff;background:linear-gradient(145deg,#5c6cff,#8d6bff);}
.voice .who b{display:block;font-size:13.5px;color:#fff;font-weight:700;}
.voice .who span{font-size:12px;color:rgba(226,232,255,.58);}
/* ---------- audience ---------- */
.aud-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.aud-item{
 display:flex;gap:14px;align-items:flex-start;padding:20px;border-radius:var(--r-md);
 background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.aud-item:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.3);}
.aud-icon{
 width:42px;height:42px;flex:0 0 auto;border-radius:12px;display:grid;place-items:center;
 background:rgba(74,92,245,.1);color:var(--brand);
}
.aud-item h3{font-size:15px;margin-bottom:6px;}
.aud-item p{font-size:13.5px;color:var(--muted);line-height:1.75;margin:0;}
/* ---------- news list ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.news-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 overflow:hidden;box-shadow:var(--sh-sm);display:flex;flex-direction:column;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(74,92,245,.34);color:inherit;}
.news-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.news-card:hover .thumb img{transform:scale(1.05);}
.news-card .body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.news-card h3{font-size:15.5px;color:var(--ink);line-height:1.55;}
.news-card p{font-size:13.2px;color:var(--muted);line-height:1.72;margin:0;}
.news-card .meta{display:flex;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:auto;padding-top:8px;}
.news-empty{
 grid-column:1/-1;padding:34px;text-align:center;border:1px dashed var(--line);
 border-radius:var(--r-md);color:var(--muted);font-size:14px;background:var(--surface);
}
/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;display:grid;gap:12px;}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
 box-shadow:var(--sh-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(74,92,245,.34);box-shadow:var(--sh-md);}
.faq-item summary{
 list-style:none;cursor:pointer;padding:18px 22px;font-size:15px;font-weight:700;color:var(--ink);
 display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary .plus{
 width:24px;height:24px;flex:0 0 auto;border-radius:8px;display:grid;place-items:center;
 background:var(--surface-2);color:var(--brand);font-size:15px;font-weight:800;transition:transform .2s ease;
}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item .ans{padding:0 22px 20px;font-size:14px;color:var(--muted);line-height:1.85;}
/* ---------- cta ---------- */
.cta-band{
 position:relative;overflow:hidden;border-radius:var(--r-xl);
 padding:48px 44px;color:#fff;background:#161d3d;
 background-image:linear-gradient(135deg,rgba(23,30,66,.94),rgba(58,73,216,.86));
 box-shadow:var(--sh-lg);
}
.cta-band .cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.22;}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-inner p{color:rgba(236,240,255,.82);font-size:14.5px;line-height:1.85;margin:0;}
.sub-form{display:flex;gap:10px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);padding:8px;border-radius:14px;}
.sub-form input{
 flex:1 1 auto;min-width:0;background:transparent;border:0;outline:none;
 color:#fff;font-size:14px;padding:0 12px;font-family:inherit;height:42px;
}
.sub-form input::placeholder{color:rgba(236,240,255,.6);}
.sub-form .btn{flex:0 0 auto;}
.form-note{margin-top:12px;font-size:12.5px;color:rgba(236,240,255,.66);min-height:18px;}
.form-note.ok{color:#8ef0d6;font-weight:600;}
/* ---------- footer ---------- */
.site-footer{background:#0f1428;color:rgba(226,231,248,.72);padding:62px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px;}
.site-footer p{font-size:13.5px;line-height:1.85;color:rgba(226,231,248,.62);max-width:360px;margin:0;}
.site-footer h4{color:#fff;font-size:13.5px;font-weight:700;letter-spacing:.6px;margin:4px 0 14px;}
.site-footer a{display:block;color:rgba(226,231,248,.72);font-size:13.5px;padding:5px 0;transition:color .2s ease,transform .2s ease;}
.site-footer a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:20px;
 display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
 font-size:12.5px;color:rgba(226,231,248,.48);
}
/* ---------- responsive ---------- */
@media screen and (max-width:1100px){
 .cmd-search{width:168px;}
 .nav-link{padding:8px 10px;font-size:13.5px;}
 .cat-hero-inner{grid-template-columns:1fr;gap:34px;}
 .hero-panel{max-width:520px;}
 .grid-4{grid-template-columns:repeat(2,1fr);}
 .flow{grid-template-columns:repeat(2,1fr);}
 .news-grid{grid-template-columns:repeat(2,1fr);}
}
@media screen and (max-width:900px){
 .main-nav{
  position:absolute;top:64px;left:0;right:0;
  flex-direction:column;align-items:stretch;gap:4px;
  background:#fff;border-bottom:1px solid var(--line);
  padding:12px 20px 18px;box-shadow:0 18px 34px rgba(17,22,41,.12);
  display:none;
 }
 .main-nav.is-open{display:flex;}
 .main-nav .nav-link{padding:11px 12px;font-size:14.5px;}
 .nav-toggle{display:grid;}
 .cmd-search{display:none;}
 .header-inner{justify-content:space-between;}
 .main-nav{flex:0 0 auto;}
 .grid-3{grid-template-columns:repeat(2,1fr);}
 .stat-grid{grid-template-columns:repeat(2,1fr);}
 .compare-head{display:none;}
 .compare-row{grid-template-columns:1fr 1fr;gap:8px 14px;padding:18px 20px;}
 .compare-row .impact{grid-column:1/-1;}
 .compare-row::before{content:attr(data-item);grid-column:1/-1;font-weight:800;color:var(--ink);font-size:14px;}
 .compare-row .item{display:none;}
 .aud-list{grid-template-columns:1fr;}
 .cta-inner{grid-template-columns:1fr;gap:22px;}
 .footer-grid{grid-template-columns:1fr 1fr;}
}
@media screen and (max-width:640px){
 .container{padding:0 18px;}
 .section{padding:52px 0;}
 .cat-hero{padding:52px 0 48px;}
 .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
 .section-head .head-note{max-width:none;}
 .grid-2,.grid-3,.grid-4,.flow,.news-grid,.stat-grid{grid-template-columns:1fr;}
 .hero-actions{flex-direction:column;align-items:stretch;}
 .hero-actions .btn{width:100%;}
 .cta-band{padding:32px 22px;border-radius:var(--r-lg);}
 .sub-form{flex-direction:column;gap:8px;}
 .sub-form input{height:40px;}
 .footer-grid{grid-template-columns:1fr;gap:26px;}
 .footer-bottom{flex-direction:column;}
 .logo-text{font-size:15px;}
 .cat-hero h1{font-size:26px;}
}