/* roulang page: index */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1322;
  --bg-700:#101D33;
  --line:rgba(122,196,255,.14);
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.09);
  --accent:#35F2C0;
  --accent-2:#7B8CFF;
  --hot:#FFB020;
  --danger:#FF5C6C;
  --text-hi:#EAF2FF;
  --text-mid:#9FB3CC;
  --text-low:#64748B;
  --inverse:#041018;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 48px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(53,242,192,.35),0 0 26px rgba(53,242,192,.26);
  --container:1200px;
  --sect:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg-900);
  background-image:
    linear-gradient(rgba(122,196,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,196,255,.045) 1px,transparent 1px);
  background-size:52px 52px,52px 52px;
  color:var(--text-mid);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,rgba(53,242,192,.9),rgba(53,242,192,.25) 38%,transparent 78%);
  z-index:999;
  pointer-events:none;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease,opacity .22s ease;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:800;line-height:1.25;letter-spacing:.2px;}
h1{font-size:clamp(28px,4.2vw,46px);}
h2{font-size:clamp(22px,3vw,32px);}
h3{font-size:19px;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1600px){:root{--container:1280px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(5,10,20,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,rgba(53,242,192,.85),rgba(53,242,192,.18) 40%,transparent 75%);
}
.nav-wrap{
  display:flex;align-items:center;gap:20px;
  height:68px;max-width:var(--container);margin:0 auto;padding:0 24px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(53,242,192,.22),rgba(123,140,255,.22));
  border:1px solid rgba(53,242,192,.32);
  box-shadow:0 0 16px rgba(53,242,192,.18);
}
.brand-mark svg{width:18px;height:18px;fill:none;stroke:var(--accent);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{color:var(--text-hi);font-size:16px;font-weight:800;letter-spacing:.4px;white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--text-low);letter-spacing:1.6px;text-transform:uppercase;}

.nav-menu{display:flex;align-items:center;gap:6px;margin-left:16px;flex:1 1 auto;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-mid);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--text-hi);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{
  color:var(--text-hi);background:rgba(53,242,192,.10);box-shadow:var(--glow);
}
.nav-link.is-active::after{transform:scaleX(0);}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .18s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease,opacity .22s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--inverse);box-shadow:var(--glow);}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,242,192,.5),0 0 34px rgba(53,242,192,.4);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--text-hi);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--accent);box-shadow:0 0 0 1px rgba(53,242,192,.22),0 0 18px rgba(53,242,192,.16);}
.btn-ghost:active{transform:translateY(1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 12px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-mid);
}
.btn-text::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--hot);box-shadow:0 0 10px rgba(255,176,32,.7);}
.btn-text:hover{color:var(--text-hi);background:var(--glass);}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;}
.btn.is-loading{position:relative;pointer-events:none;}
.btn.is-loading::after{
  content:"";width:14px;height:14px;border-radius:50%;
  border:2px solid rgba(4,16,24,.35);border-top-color:var(--inverse);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg);}}

.nav-burger{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--glass);place-items:center;
}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-hi);position:relative;}
.nav-burger span::before,.nav-burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text-hi);
}
.nav-burger span::before{top:-6px;}
.nav-burger span::after{top:6px;}

.nav-mask{
  position:fixed;inset:0;background:rgba(3,6,12,.72);backdrop-filter:blur(4px);
  opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;z-index:130;
}
.nav-mask.is-open{opacity:1;visibility:visible;}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:140;
  background:rgba(10,19,34,.96);
  border-left:1px solid var(--line);
  box-shadow:-24px 0 60px rgba(0,0,0,.6);
  transform:translateX(103%);transition:transform .3s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:18px 18px 28px;
}
.nav-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-title{font-size:15px;font-weight:700;color:var(--text-hi);}
.drawer-close{width:38px;height:38px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--glass);color:var(--text-hi);display:grid;place-items:center;font-size:18px;line-height:1;}
.drawer-close:hover{border-color:var(--accent);color:var(--accent);}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-link{
  display:flex;align-items:center;height:52px;padding:0 14px;
  border-radius:var(--r-sm);font-size:16px;color:var(--text-mid);
  border-left:3px solid transparent;
}
.drawer-link:hover{background:var(--glass);color:var(--text-hi);}
.drawer-link.is-active{background:var(--glass-2);color:var(--text-hi);border-left-color:var(--accent);}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:18px;border-top:1px solid var(--line);}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;isolation:isolate;}
.hero-bg{
  position:absolute;inset:0;z-index:-2;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  background-color:#0A1322;
}
.hero-veil{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(1000px 520px at 82% 12%,rgba(123,140,255,.20),transparent 62%),
    linear-gradient(180deg,rgba(5,10,20,.72) 0%,rgba(5,10,20,.88) 58%,var(--bg-900) 100%),
    linear-gradient(90deg,rgba(5,10,20,.94) 0%,rgba(5,10,20,.62) 55%,rgba(5,10,20,.86) 100%);
}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.82fr);
  gap:44px;align-items:center;
  min-height:560px;padding-top:64px;padding-bottom:52px;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:var(--r-pill);
  background:rgba(53,242,192,.09);border:1px solid rgba(53,242,192,.28);
  color:var(--accent);font-size:13px;font-weight:600;letter-spacing:.6px;
  margin-bottom:20px;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);display:block;}
.hero h1{max-width:16em;text-shadow:0 6px 28px rgba(0,0,0,.6);}
.hero h1 em{font-style:normal;color:var(--accent);}
.hero-sub{
  margin-top:18px;max-width:34em;font-size:16px;line-height:1.9;color:var(--text-mid);
  text-shadow:0 2px 12px rgba(0,0,0,.55);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-strip{
  margin-top:40px;
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
}
.hero-strip li{
  padding:16px 18px;border-right:1px solid var(--line);
}
.hero-strip li:last-child{border-right:0;}
.strip-num{display:block;font-size:20px;font-weight:800;color:var(--text-hi);line-height:1.3;}
.strip-label{display:block;font-size:13px;color:var(--text-low);margin-top:2px;}

.hero-side{display:flex;flex-direction:column;gap:16px;}
.side-card{
  border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:var(--glass);
  box-shadow:var(--sh-card);
}
.side-card .thumb{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#0e1c33,#16283f);}
.side-card .thumb img{width:100%;height:100%;object-fit:cover;}
.side-body{padding:18px 20px 20px;}
.side-body h3{font-size:17px;margin-bottom:8px;}
.side-body p{font-size:14px;color:var(--text-mid);}
.side-quick{
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--glass);
  padding:16px 18px;display:flex;flex-direction:column;gap:10px;
}
.side-quick a{font-size:14px;color:var(--text-mid);display:flex;align-items:center;gap:10px;}
.side-quick a:hover{color:var(--accent);}
.side-quick a span{width:22px;height:22px;border-radius:7px;background:rgba(123,140,255,.16);color:var(--accent-2);display:grid;place-items:center;font-size:12px;font-weight:700;flex:0 0 auto;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sect) 0;}
.section-head{margin-bottom:36px;max-width:760px;}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:2px;color:var(--accent);
  margin-bottom:14px;
}
.section-head .kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent);box-shadow:0 0 12px rgba(53,242,192,.8);}
.section-head p{margin-top:14px;font-size:15.5px;color:var(--text-mid);}
.section-alt{background:linear-gradient(180deg,rgba(10,19,34,.55),rgba(5,10,20,0));}

/* ---------- 合集目录 ---------- */
.collection-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.coll-card{
  position:relative;display:flex;flex-direction:column;
  border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.coll-card:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.3);box-shadow:var(--sh-hover),0 0 0 1px rgba(53,242,192,.18);}
.coll-media{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#0d1a2e,#193050);overflow:hidden;}
.coll-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.coll-card:hover .coll-media img{transform:scale(1.05);}
.coll-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,20,.05),rgba(5,10,20,.72));}
.coll-no{
  position:absolute;top:14px;left:14px;z-index:2;
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  font-size:15px;font-weight:800;color:var(--accent);
  background:rgba(5,10,20,.66);border:1px solid rgba(53,242,192,.34);
  box-shadow:0 0 18px rgba(53,242,192,.22);
  font-family:"Inter",system-ui,sans-serif;
}
.coll-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.coll-body h3{font-size:18px;}
.coll-body h3 a:hover{color:var(--accent);}
.coll-body p{font-size:14.5px;color:var(--text-mid);line-height:1.8;}
.coll-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);}
.chip{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:1.6;
  background:rgba(123,140,255,.14);color:#A9B6FF;border:1px solid rgba(123,140,255,.24);
}
.chip-hot{background:rgba(255,176,32,.14);color:#FFCB68;border-color:rgba(255,176,32,.28);}
.chip-green{background:rgba(53,242,192,.12);color:var(--accent);border-color:rgba(53,242,192,.26);}
.meta-time{font-size:13px;color:var(--text-low);}

/* ---------- 精选 ---------- */
.pick-layout{display:grid;grid-template-columns:5fr 7fr;gap:28px;align-items:start;}
.pick-hero{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:var(--glass);box-shadow:var(--sh-card);
}
.pick-hero .media{position:relative;aspect-ratio:4/3;background:linear-gradient(135deg,#0d1a2e,#1b2f4d);}
.pick-hero .media img{width:100%;height:100%;object-fit:cover;}
.pick-hero .media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,20,0),rgba(5,10,20,.85));}
.badge{
  position:absolute;top:16px;left:16px;z-index:2;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:700;color:var(--inverse);background:var(--accent);
  box-shadow:0 0 20px rgba(53,242,192,.35);
}
.pick-hero .content{padding:20px 22px 24px;}
.pick-hero .content h3{font-size:20px;margin-bottom:10px;}
.pick-hero .content p{font-size:14.5px;color:var(--text-mid);}
.pick-list{display:flex;flex-direction:column;border-radius:var(--r-md);border:1px solid var(--line);background:var(--glass);overflow:hidden;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);}
.pick-item{
  display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:16px;align-items:center;
  padding:18px 20px;border-bottom:1px solid var(--line);
  transition:background-color .24s ease,transform .24s ease;
}
.pick-item:last-child{border-bottom:0;}
.pick-item:hover{background:var(--glass-2);transform:translateX(4px);}
.pick-index{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font-size:14px;font-weight:800;font-family:"Inter",system-ui,sans-serif;
  color:var(--accent-2);background:rgba(123,140,255,.13);border:1px solid rgba(123,140,255,.22);
}
.pick-item:hover .pick-index{color:var(--accent);background:rgba(53,242,192,.12);border-color:rgba(53,242,192,.28);box-shadow:0 0 16px rgba(53,242,192,.18);}
.pick-main h4{font-size:16.5px;color:var(--text-hi);font-weight:700;line-height:1.5;}
.pick-main .pick-desc{font-size:13.5px;color:var(--text-low);margin-top:4px;}
.pick-side{display:flex;flex-direction:column;align-items:flex-end;gap:6px;}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;flex-direction:column;gap:12px;
  padding:22px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.3);box-shadow:var(--sh-hover);}
.news-card h3{font-size:17.5px;line-height:1.55;}
.news-card h3 a:hover{color:var(--accent);}
.news-card p{
  font-size:14.5px;color:var(--text-mid);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);}
.news-link{font-size:14px;color:var(--accent);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.news-link::after{content:"›";font-size:16px;line-height:1;}
.news-link:hover{text-decoration:underline;text-underline-offset:4px;}
.empty-state{
  grid-column:1/-1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  padding:56px 24px;border-radius:var(--r-md);
  border:1px dashed rgba(122,196,255,.24);background:rgba(255,255,255,.028);text-align:center;
}
.empty-art{
  width:74px;height:74px;border-radius:22px;
  background:linear-gradient(140deg,rgba(53,242,192,.16),rgba(123,140,255,.16));
  border:1px solid rgba(122,196,255,.24);
  position:relative;
}
.empty-art::before,.empty-art::after{content:"";position:absolute;left:50%;transform:translateX(-50%);border-radius:3px;background:rgba(234,242,255,.6);}
.empty-art::before{top:22px;width:34px;height:3px;}
.empty-art::after{top:34px;width:22px;height:3px;}
.empty-state p{font-size:15px;color:var(--text-mid);}

/* ---------- 横向滚动推荐 ---------- */
.rail-wrap{position:relative;margin:0 -24px;padding:0 24px;}
.rail-wrap::before,.rail-wrap::after{
  content:"";position:absolute;top:0;bottom:14px;width:44px;pointer-events:none;z-index:3;
}
.rail-wrap::before{left:0;background:linear-gradient(90deg,var(--bg-900),transparent);}
.rail-wrap::after{right:0;background:linear-gradient(270deg,var(--bg-900),transparent);}
.rail{
  display:flex;gap:24px;overflow-x:auto;padding:6px 4px 20px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-track{background:rgba(255,255,255,.04);border-radius:99px;}
.rail::-webkit-scrollbar-thumb{background:rgba(53,242,192,.35);border-radius:99px;}
.rail::-webkit-scrollbar-thumb:hover{background:rgba(53,242,192,.6);}
.rail-card{
  flex:0 0 calc((100% - 3 * 24px) / 4.5);
  scroll-snap-align:start;
  border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.rail-card:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.3);box-shadow:var(--sh-hover);}
.rail-media{aspect-ratio:16/10;background:linear-gradient(135deg,#0d1a2e,#1c3251);overflow:hidden;}
.rail-media img{width:100%;height:100%;object-fit:cover;}
.rail-body{padding:16px 18px 20px;}
.rail-body h3{font-size:16px;line-height:1.55;margin-bottom:8px;}
.rail-body p{font-size:13.5px;color:var(--text-low);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;}
.faq-item{
  border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--glass);overflow:hidden;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:border-color .26s ease,box-shadow .26s ease;
}
.faq-item[open]{border-color:rgba(53,242,192,.3);box-shadow:0 0 0 1px rgba(53,242,192,.12),0 18px 44px rgba(0,0,0,.5);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-size:16.5px;font-weight:700;color:var(--text-hi);
  border-left:3px solid transparent;transition:border-color .26s ease,background-color .26s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:var(--glass-2);}
.faq-item[open] summary{border-left-color:var(--accent);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;position:relative;
  background:rgba(53,242,192,.12);border:1px solid rgba(53,242,192,.26);transition:transform .26s ease;
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;top:50%;left:50%;background:var(--accent);transform:translate(-50%,-50%);border-radius:2px;}
.faq-icon::before{width:11px;height:2px;}
.faq-icon::after{width:2px;height:11px;transition:opacity .22s ease;}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-answer{padding:0 22px 22px;border-left:3px solid rgba(53,242,192,.5);}
.faq-answer p{font-size:15px;color:var(--text-mid);line-height:1.9;}
.faq-answer p + p{margin-top:10px;}

/* ---------- CTA 条 ---------- */
.cta-band{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:
    radial-gradient(680px 260px at 12% 0%,rgba(53,242,192,.16),transparent 62%),
    radial-gradient(560px 260px at 92% 100%,rgba(123,140,255,.18),transparent 66%),
    var(--glass);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  padding:38px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh-card);
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:10px;}
.cta-band p{font-size:15px;color:var(--text-mid);max-width:44em;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;flex:0 0 auto;}
.share-group{display:flex;align-items:center;gap:10px;}
.share-btn{
  width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--glass);
  display:grid;place-items:center;
  transition:border-color .22s ease,color .22s ease,background-color .22s ease,transform .22s ease;
}
.share-btn svg{width:18px;height:18px;fill:none;stroke:var(--text-mid);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.share-btn:hover{border-color:var(--accent);background:rgba(53,242,192,.1);transform:translateY(-2px);}
.share-btn:hover svg{stroke:var(--accent);}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,19,34,.5),rgba(5,10,20,1));
  padding:60px 0 28px;
  margin-top:24px;
}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;}
.footer-brand{display:flex;flex-direction:column;gap:14px;max-width:340px;}
.footer-brand .brand-name{font-size:17px;}
.footer-brand p{font-size:14px;color:var(--text-low);line-height:1.9;}
.footer-col h4{font-size:15px;color:var(--text-hi);margin-bottom:16px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--text-mid);}
.footer-col a:hover{color:var(--accent);}
.footer-note{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;
}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-low);
}
.footer-bottom a{color:var(--text-low);}
.footer-bottom a:hover{color:var(--accent);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--sect:72px;}
  .hero-inner{grid-template-columns:minmax(0,1fr) minmax(0,.8fr);gap:34px;min-height:520px;}
  .collection-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rail-card{flex:0 0 calc((100% - 2 * 20px) / 3.4);}
  .rail{gap:20px;}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:30px;}
}
@media (max-width:991px){
  .nav-menu,.nav-actions .btn-ghost{display:none;}
  .nav-burger{display:grid;}
  .nav-wrap{height:56px;gap:12px;}
  .brand-mark{width:30px;height:30px;border-radius:9px;}
  .brand-name{font-size:15px;}
  .brand-sub{display:none;}
  .nav-actions .btn-primary{padding:9px 16px;font-size:14px;}
  .hero-inner{grid-template-columns:minmax(0,1fr);min-height:auto;padding-top:52px;padding-bottom:44px;gap:30px;}
  .hero h1{max-width:none;}
  .hero-sub{max-width:none;}
  .hero-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .hero-strip li:nth-child(2){border-right:0;}
  .hero-strip li:nth-child(1),.hero-strip li:nth-child(2){border-bottom:1px solid var(--line);}
  .collection-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .pick-layout{grid-template-columns:minmax(0,1fr);}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{flex-direction:column;align-items:flex-start;gap:24px;padding:32px 28px;}
  .cta-actions{width:100%;}
  .rail-card{flex:0 0 calc((100% - 2 * 18px) / 2.4);}
  .rail{gap:18px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  :root{--sect:56px;}
  .hero-inner{padding-top:40px;padding-bottom:36px;}
  .hero-cta{gap:10px;}
  .hero-cta .btn{flex:1 1 100%;}
  .hero-strip{grid-template-columns:minmax(0,1fr);}
  .hero-strip li{border-right:0;border-bottom:1px solid var(--line);}
  .hero-strip li:last-child{border-bottom:0;}
  .collection-grid{grid-template-columns:minmax(0,1fr);gap:18px;}
  .news-grid{grid-template-columns:minmax(0,1fr);}
  .pick-item{grid-template-columns:40px minmax(0,1fr);gap:12px;padding:16px;}
  .pick-side{grid-column:2;flex-direction:row;align-items:center;gap:10px;}
  .rail-wrap{margin:0 -18px;padding:0 18px;}
  .rail-card{flex:0 0 78%;}
  .cta-band{padding:26px 20px;}
  .share-group{flex-wrap:wrap;}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px;}
  .site-footer{padding:44px 0 22px;}
  .faq-item summary{padding:16px 18px;font-size:15.5px;gap:12px;}
  .faq-answer{padding:0 18px 18px;}
}
@media (max-width:479px){
  body{font-size:15px;}
  .section{padding:48px 0;}
  .nav-actions .btn-primary{padding:8px 13px;font-size:13.5px;}
  .hero-strip li{padding:14px 15px;}
  .strip-num{font-size:18px;}
  .coll-body{padding:16px 16px 18px;}
  .cta-actions .btn{flex:1 1 100%;}
  .empty-state{padding:40px 18px;}
}

/* roulang page: article */
:root{
  --bg-900:#050A14;--bg-800:#0A1322;--bg-700:#101D33;
  --line:rgba(122,196,255,.14);
  --glass:rgba(255,255,255,.055);--glass-2:rgba(255,255,255,.09);
  --accent:#35F2C0;--accent-2:#7B8CFF;--hot:#FFB020;--danger:#FF5C6C;
  --text-hi:#EAF2FF;--text-mid:#9FB3CC;--text-low:#64748B;--inverse:#041018;
  --r-sm:10px;--r-md:16px;--r-lg:22px;--r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 48px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(53,242,192,.35),0 0 26px rgba(53,242,192,.26);
  --ff:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--ff);font-size:16px;line-height:1.85;color:var(--text-mid);
  background:var(--bg-900);
  background-image:
    radial-gradient(900px 480px at 12% -6%,rgba(53,242,192,.09),transparent 62%),
    radial-gradient(760px 420px at 92% 4%,rgba(123,140,255,.10),transparent 60%),
    linear-gradient(180deg,#050A14 0%,#08101E 48%,#050A14 100%);
  background-attachment:fixed;
  min-height:100vh;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.05;
  background-image:linear-gradient(rgba(122,196,255,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(122,196,255,.55) 1px,transparent 1px);
  background-size:56px 56px;
}
body::after{
  content:"";position:fixed;top:0;left:0;right:0;height:2px;z-index:60;pointer-events:none;
  background:linear-gradient(90deg,rgba(53,242,192,.9),rgba(53,242,192,.25) 38%,transparent 78%);
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,opacity .22s ease}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:800;line-height:1.25;letter-spacing:.2px}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(53,242,192,.28);color:#fff}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
@media (min-width:1600px){.container{max-width:1280px}}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(5,10,20,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--accent),rgba(53,242,192,.18) 42%,transparent 80%);
}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(53,242,192,.22),rgba(123,140,255,.24));
  border:1px solid rgba(53,242,192,.35);box-shadow:0 0 18px rgba(53,242,192,.22);
}
.brand-mark svg{width:19px;height:19px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{color:var(--text-hi);font-weight:800;font-size:16px;letter-spacing:.3px;white-space:nowrap}
.brand-sub{color:var(--text-low);font-size:11px;letter-spacing:2.4px;text-transform:uppercase}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:9px 14px;border-radius:var(--r-pill);
  color:var(--text-mid);font-size:15px;white-space:nowrap;border:1px solid transparent;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;border-radius:2px;
  background:var(--accent);transform:translateX(-50%);transition:width .24s ease;
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{width:calc(100% - 26px)}
.nav-link.is-active{color:var(--text-hi);background:var(--glass-2);border-color:rgba(53,242,192,.32);box-shadow:var(--glow)}
.nav-link.is-active::after{width:0}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;line-height:1.2;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,filter .22s ease,opacity .22s ease;
}
.btn-primary{background:var(--accent);color:var(--inverse);box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,242,192,.45),0 0 32px rgba(53,242,192,.34);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--accent);box-shadow:0 0 18px rgba(53,242,192,.18)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{background:transparent;color:var(--text-mid);padding:11px 12px;font-weight:600}
.btn-text::before{content:"›";color:var(--accent);font-size:17px;line-height:1}
.btn-text:hover{color:var(--text-hi)}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}
.btn.is-loading{pointer-events:none;opacity:.8}
.btn.is-loading::after{
  content:"";width:13px;height:13px;border-radius:50%;
  border:2px solid rgba(4,16,24,.35);border-top-color:var(--inverse);animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;background:var(--glass);
  border:1px solid var(--line);cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;position:relative;transition:.2s}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,7,14,.66);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;transition:.26s;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);z-index:80;
  background:linear-gradient(180deg,rgba(10,19,34,.98),rgba(5,10,20,.99));
  border-left:1px solid var(--line);transform:translateX(105%);transition:transform .28s ease;
  padding:22px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-head .brand-name{font-size:15px}
.drawer-close{
  width:38px;height:38px;border-radius:12px;background:var(--glass);border:1px solid var(--line);
  color:var(--text-hi);font-size:18px;cursor:pointer;line-height:1;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-nav a{
  display:flex;align-items:center;height:52px;padding:0 14px;color:var(--text-mid);
  border-left:3px solid transparent;border-radius:var(--r-sm);font-size:16px;
}
.drawer-nav a:hover{background:var(--glass);color:var(--text-hi)}
.drawer-nav a.is-active{color:var(--text-hi);border-left-color:var(--accent);background:var(--glass-2)}
.drawer-foot{margin-top:22px;display:grid;gap:10px}
.drawer-foot .btn{width:100%}

/* ============ page banner ============ */
.page-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.page-banner-bg{
  position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.34;transform:scale(1.02);
}
.page-banner-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,.72) 0%,rgba(5,10,20,.9) 58%,rgba(5,10,20,.98) 100%);
}
.page-banner-inner{position:relative;z-index:2;padding:34px 0 44px}
.crumbs{font-size:13px;color:var(--text-low);display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px}
.crumbs a{color:var(--text-mid)}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:var(--text-low);opacity:.7}
.crumbs .current{color:var(--text-low);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-h1{font-size:clamp(24px,3.4vw,38px);max-width:960px}
.article-h1 + .lede{margin-top:14px;color:var(--text-mid);font-size:16px;max-width:820px}
.meta-bar{
  margin-top:22px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:14px 18px;border-radius:var(--r-md);background:var(--glass);
  border:1px solid var(--line);backdrop-filter:blur(14px);
}
.meta-item{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text-mid)}
.meta-item .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(53,242,192,.6)}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:1.6;background:rgba(123,140,255,.14);color:#C6CEFF;border:1px solid rgba(123,140,255,.22);
}
.chip-green{background:rgba(53,242,192,.13);color:#8FF4D8;border-color:rgba(53,242,192,.28)}
.chip-hot{background:rgba(255,176,32,.13);color:#FFD48A;border-color:rgba(255,176,32,.28)}
.chip-plain{background:var(--glass);color:var(--text-mid);border-color:var(--line)}

/* ============ layout ============ */
.section{padding:88px 0}
.section-tight{padding:64px 0 88px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.section-head h2{font-size:clamp(22px,3vw,32px)}
.section-head p{margin:10px 0 0;color:var(--text-mid);font-size:15px;max-width:680px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:2.6px;
  text-transform:uppercase;color:var(--accent-2);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent-2);opacity:.7}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 232px;gap:48px;align-items:start}
.reading-wrap{max-width:780px;width:100%}
.article-card{
  border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);box-shadow:var(--sh-card);padding:34px 38px 30px;
}
.article-body{font-size:16px;line-height:1.85;color:var(--text-mid);word-break:break-word}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  font-size:clamp(20px,2.4vw,25px);margin:34px 0 14px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),rgba(123,140,255,.7));box-shadow:0 0 14px rgba(53,242,192,.35);
}
.article-body h3{font-size:19px;margin:26px 0 12px}
.article-body p{margin:0 0 1.1em}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:#7CFBD8}
.article-body strong{color:var(--text-hi)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:2px}
.article-body ul li,.article-body ol li{position:relative;padding-left:20px;margin-bottom:9px;line-height:1.9}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.78em;width:6px;height:6px;border-radius:50%;
  background:var(--accent-2);box-shadow:0 0 8px rgba(123,140,255,.55);
}
.article-body ol{counter-reset:li}
.article-body ol li{counter-increment:li;padding-left:30px}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:.32em;width:20px;height:20px;border-radius:7px;
  background:var(--glass-2);border:1px solid var(--line);color:var(--accent-2);
  font-size:12px;font-weight:700;display:grid;place-items:center;line-height:1;
}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;border-left:3px solid var(--accent);border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:var(--glass);color:var(--text-hi);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:22px auto;max-width:100%;height:auto}
.article-body code{
  background:var(--glass-2);border:1px solid var(--line);border-radius:6px;padding:2px 6px;
  font-size:14px;color:#BEE9FF;
}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:11px 12px;text-align:left}
.article-body th{color:var(--text-hi);background:var(--glass)}

.toc{
  position:sticky;top:96px;border-radius:var(--r-md);background:var(--glass);
  border:1px solid var(--line);backdrop-filter:blur(14px);padding:20px 18px;box-shadow:var(--sh-card);
}
.toc h4{font-size:13px;letter-spacing:2px;color:var(--text-low);text-transform:uppercase;margin-bottom:14px;font-weight:700}
.toc ol{display:grid;gap:4px;counter-reset:toc}
.toc a{
  display:block;padding:8px 10px 8px 14px;font-size:14px;line-height:1.6;color:var(--text-mid);
  border-left:2px solid transparent;border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.toc a:hover{background:var(--glass-2);color:var(--text-hi);transform:translateX(3px)}
.toc a.is-current{color:var(--text-hi);border-left-color:var(--accent);background:var(--glass-2);box-shadow:0 0 16px rgba(53,242,192,.14)}
.toc-note{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-low)}

.empty-state{
  text-align:center;padding:56px 24px;border-radius:var(--r-md);
  background:var(--glass);border:1px dashed rgba(122,196,255,.24);
}
.empty-ico{
  width:64px;height:64px;margin:0 auto 18px;border-radius:20px;
  background:linear-gradient(140deg,rgba(53,242,192,.16),rgba(123,140,255,.2));
  border:1px solid var(--line);position:relative;
}
.empty-ico::before,.empty-ico::after{content:"";position:absolute;background:var(--accent-2);border-radius:3px;opacity:.85}
.empty-ico::before{left:20px;right:20px;top:26px;height:2px}
.empty-ico::after{left:20px;right:30px;top:36px;height:2px}
.empty-state h3{font-size:19px;margin-bottom:10px}
.empty-state p{max-width:460px;margin:0 auto 20px;font-size:15px}

/* tags + share */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:30px 0 0}
.share-bar{
  margin-top:34px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(53,242,192,.09),rgba(123,140,255,.09) 55%,rgba(255,255,255,.04));
  backdrop-filter:blur(14px);box-shadow:var(--sh-card);
  padding:24px 26px;display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;
}
.share-bar h3{font-size:19px}
.share-bar p{margin:8px 0 0;font-size:14px;color:var(--text-mid);max-width:520px}
.share-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.icon-btn{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;cursor:pointer;
  background:var(--glass);border:1px solid var(--line);color:var(--text-mid);
  transition:.22s;
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent);box-shadow:0 0 16px rgba(53,242,192,.18);transform:translateY(-2px)}
.icon-btn svg{width:17px;height:17px}
.copy-tip{font-size:13px;color:var(--accent);min-height:18px;width:100%;text-align:right}

.post-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:34px}
.post-nav a{
  display:block;padding:18px 20px;border-radius:var(--r-md);background:var(--glass);
  border:1px solid var(--line);transition:.22s;
}
.post-nav a:hover{border-color:rgba(53,242,192,.4);transform:translateY(-3px);box-shadow:var(--sh-hover)}
.post-nav span{display:block;font-size:12px;color:var(--text-low);letter-spacing:1.8px;margin-bottom:8px}
.post-nav strong{color:var(--text-hi);font-size:15px;font-weight:700}

/* related cards */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.34);box-shadow:var(--sh-hover),0 0 0 1px rgba(53,242,192,.22)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,rgba(123,140,255,.26),rgba(53,242,192,.18))}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.05)}
.card-media .fallback{position:absolute;inset:0;display:grid;place-items:center;color:var(--text-hi);font-weight:800;font-size:22px;letter-spacing:2px}
.card-media .badge{
  position:absolute;left:12px;top:12px;padding:4px 11px;border-radius:var(--r-pill);font-size:12px;
  background:rgba(4,16,24,.72);border:1px solid rgba(53,242,192,.35);color:#9BF6DD;backdrop-filter:blur(6px);
}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5}
.card-body p{margin:0;font-size:14px;color:var(--text-mid);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;gap:10px;margin-top:auto;font-size:13px;color:var(--text-low);flex-wrap:wrap}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(14px);overflow:hidden;transition:.22s;
}
.faq-item[open]{border-color:rgba(53,242,192,.34);box-shadow:0 0 0 1px rgba(53,242,192,.16)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px 18px 24px;position:relative;
  color:var(--text-hi);font-weight:700;font-size:16px;display:flex;align-items:center;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";width:3px;align-self:stretch;min-height:22px;border-radius:3px;background:var(--line);transition:.22s;
}
.faq-item[open] summary::before{background:linear-gradient(180deg,var(--accent),var(--accent-2));box-shadow:0 0 14px rgba(53,242,192,.4)}
.faq-item summary::after{
  content:"+";margin-left:auto;color:var(--accent);font-size:20px;font-weight:600;transition:transform .22s;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 22px 20px 39px;font-size:15px;color:var(--text-mid)}

/* CTA */
.cta-band{
  border-radius:var(--r-lg);padding:34px 36px;
  background:linear-gradient(120deg,rgba(53,242,192,.11),rgba(123,140,255,.12) 60%,rgba(255,255,255,.03));
  border:1px solid var(--line);backdrop-filter:blur(14px);box-shadow:var(--sh-card);
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px)}
.cta-band p{margin:10px 0 0;font-size:15px;color:var(--text-mid);max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* footer */
.site-footer{margin-top:20px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(10,19,34,.6),rgba(5,10,20,.95))}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.footer-brand .brand-name{font-size:17px;display:block;margin-bottom:12px}
.footer-brand p{margin:0 0 16px;font-size:14px;line-height:1.8;color:var(--text-mid);max-width:420px}
.footer-note{display:flex;gap:10px;flex-wrap:wrap}
.footer-col h4{font-size:14px;color:var(--text-hi);margin-bottom:16px;letter-spacing:.6px}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14px;color:var(--text-mid)}
.footer-col a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 26px;display:flex;align-items:center;
  justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--text-low);
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .toc{position:static;order:-1;margin-bottom:8px}
  .toc ol{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}
}
@media (max-width:991px){
  .nav-menu{display:none}
  .header-actions .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .header-inner{height:56px;gap:14px}
  .brand-mark{width:30px;height:30px}
  .brand-name{font-size:15px}
  .section{padding:64px 0}
  .section-tight{padding:48px 0 64px}
  .page-banner-inner{padding:26px 0 34px}
  .article-card{padding:26px 24px 22px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
}
@media (max-width:767px){
  body{font-size:15px}
  .container{padding:0 18px}
  .section{padding:48px 0}
  .section-tight{padding:38px 0 52px}
  .article-h1{font-size:clamp(22px,6vw,28px)}
  .page-banner-mask{background:linear-gradient(180deg,rgba(5,10,20,.8) 0%,rgba(5,10,20,.94) 60%,rgba(5,10,20,1) 100%)}
  .meta-bar{padding:12px 14px}
  .article-card{padding:22px 18px 18px;border-radius:var(--r-md)}
  .toc ol{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .cta-band{padding:26px 20px;flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .share-bar{flex-direction:column;align-items:stretch}
  .share-actions{justify-content:flex-start}
  .copy-tip{text-align:left}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-item .faq-answer{padding-left:24px}
}
@media (max-width:479px){
  .container{padding:0 14px}
  .brand-sub{display:none}
  .header-actions .btn-primary{padding:10px 16px;font-size:14px}
  .chip{font-size:12px;padding:4px 10px}
  .btn{width:100%}
  .header-actions .btn{width:auto}
  .footer-top{grid-template-columns:1fr}
}

/* roulang page: category1 */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1322;
  --bg-700:#101D33;
  --line:rgba(122,196,255,.14);
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.09);
  --accent:#35F2C0;
  --accent-2:#7B8CFF;
  --hot:#FFB020;
  --danger:#FF5C6C;
  --text-hi:#EAF2FF;
  --text-mid:#9FB3CC;
  --text-low:#64748B;
  --inverse:#041018;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 48px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(53,242,192,.35), 0 0 26px rgba(53,242,192,.26);
  --container:1200px;
  --section-y:88px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text-mid);
  background-color:var(--bg-900);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(122,196,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,196,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.6;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease}
button,input{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{color:var(--text-hi);font-weight:800;line-height:1.25;letter-spacing:.2px}
h1{font-size:clamp(28px,4.2vw,46px)}
h2{font-size:clamp(22px,3vw,32px)}
h3{font-size:clamp(18px,2vw,20px)}
p{font-size:16px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:var(--section-y) 0;position:relative;z-index:1}
.section-alt{background:linear-gradient(180deg,rgba(16,29,51,.55),rgba(5,10,20,0))}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1.6px;text-transform:uppercase;
  color:var(--accent);font-weight:700;margin-bottom:14px;
}
.section-head .eyebrow::before{
  content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;
}
.section-head p{margin-top:14px;color:var(--text-mid);font-size:16px}

/* ============ 顶部霓虹光带 ============ */
.neon-band{
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--accent),rgba(53,242,192,0) 62%);
  z-index:2;
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(5,10,20,.88);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;left:0;bottom:-1px;height:2px;width:46%;
  background:linear-gradient(90deg,var(--accent),rgba(53,242,192,0));
}
.header-inner{
  height:68px;display:flex;align-items:center;gap:28px;
  justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,rgba(53,242,192,.22),rgba(123,140,255,.22));
  border:1px solid rgba(53,242,192,.35);
  display:grid;place-items:center;
  color:var(--accent);font-weight:800;font-size:17px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{color:var(--text-hi);font-weight:800;font-size:16px;letter-spacing:.4px}
.brand-sub{font-size:12px;color:var(--text-low);letter-spacing:1px}
.nav-menu{display:flex;align-items:center;gap:6px;flex:1;justify-content:center}
.nav-link{
  position:relative;
  padding:9px 15px;border-radius:var(--r-pill);
  font-size:15px;color:var(--text-mid);
  transition:color .2s ease,background .2s ease,box-shadow .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:0;height:2px;border-radius:2px;background:var(--accent);
  transition:width .22s ease;
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{width:22px}
.nav-link.is-active{
  color:var(--text-hi);
  background:var(--glass);
  box-shadow:var(--glow);
}
.nav-link.is-active::after{width:22px}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.burger{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);
  cursor:pointer;position:relative;
}
.burger span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;
  background:var(--text-hi);transition:transform .25s ease,opacity .2s ease;
}
.burger span:nth-child(1){top:15px}
.burger span:nth-child(2){top:21px}
.burger span:nth-child(3){top:27px}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(2,6,12,.72);
  backdrop-filter:blur(4px);
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
  z-index:140;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);
  background:linear-gradient(180deg,rgba(10,19,34,.98),rgba(5,10,20,.98));
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .32s cubic-bezier(.4,.1,.2,1);
  z-index:150;padding:22px 20px 32px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-title{font-size:14px;letter-spacing:2px;color:var(--text-low)}
.drawer-close{
  width:38px;height:38px;border-radius:10px;background:var(--glass);
  border:1px solid var(--line);color:var(--text-hi);cursor:pointer;font-size:18px;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  display:flex;align-items:center;height:52px;padding:0 16px;
  border-radius:var(--r-sm);color:var(--text-mid);font-size:16px;
  border-left:3px solid transparent;
}
.drawer-nav a:hover{background:var(--glass-2);color:var(--text-hi)}
.drawer-nav a.is-active{
  background:var(--glass);color:var(--text-hi);border-left-color:var(--accent);
  box-shadow:var(--glow);
}
.drawer-cta{margin-top:24px;display:flex;flex-direction:column;gap:10px}
.drawer-cta .btn{width:100%}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .22s ease,box-shadow .22s ease,color .22s ease,border-color .22s ease,transform .12s ease,filter .22s ease;
}
.btn-primary{background:var(--accent);color:var(--inverse);box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,242,192,.45),0 0 34px rgba(53,242,192,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--line);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--accent);box-shadow:0 0 0 1px rgba(53,242,192,.2),0 0 18px rgba(53,242,192,.16)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{
  background:transparent;color:var(--text-mid);height:42px;padding:0 14px;font-weight:600;
}
.btn-text::before{
  content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 10px rgba(53,242,192,.9);display:inline-block;
}
.btn-text:hover{color:var(--text-hi)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn:disabled{opacity:.45;box-shadow:none;cursor:not-allowed;filter:none}
.btn.is-loading{position:relative;padding-left:44px}
.btn.is-loading::after{
  content:"";position:absolute;left:20px;width:14px;height:14px;border-radius:50%;
  border:2px solid rgba(4,16,24,.35);border-top-color:var(--inverse);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============ 标签 ============ */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:1.6;
  background:var(--glass);border:1px solid var(--line);color:var(--text-mid);
}
.chip-green{background:rgba(53,242,192,.12);border-color:rgba(53,242,192,.3);color:var(--accent)}
.chip-purple{background:rgba(123,140,255,.14);border-color:rgba(123,140,255,.3);color:#B6C0FF}
.chip-hot{background:rgba(255,176,32,.14);border-color:rgba(255,176,32,.32);color:var(--hot)}

/* ============ 首屏 ============ */
.cat-hero{
  position:relative;overflow:hidden;
  min-height:480px;display:flex;align-items:center;
  padding:64px 0 56px;
  border-bottom:1px solid var(--line);
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  filter:saturate(.9);
}
.cat-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(5,10,20,.96) 0%,rgba(5,10,20,.82) 45%,rgba(5,10,20,.62) 100%),
    linear-gradient(180deg,rgba(5,10,20,.5),rgba(5,10,20,.92));
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{font-size:13px;color:var(--text-low);margin-bottom:22px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--text-mid)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:8px;color:var(--text-low)}
.breadcrumb li[aria-current]{color:var(--text-low)}
.hero-tagline{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(53,242,192,.1);border:1px solid rgba(53,242,192,.28);
  color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.6px;
}
.cat-hero h1{max-width:900px}
.cat-hero h1 em{font-style:normal;color:var(--accent)}
.hero-desc{
  margin-top:18px;max-width:680px;font-size:16px;color:var(--text-mid);
}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px;
  font-size:13px;color:var(--text-low);
}
.hero-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-low)}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* ============ 步骤流 ============ */
.steps{display:grid;gap:0;position:relative}
.step{
  position:relative;display:grid;grid-template-columns:66px 1fr;gap:22px;
  padding-bottom:30px;
}
.step:last-child{padding-bottom:0}
.step:not(:last-child)::after{
  content:"";position:absolute;left:32px;top:66px;bottom:6px;width:2px;
  background:linear-gradient(180deg,rgba(53,242,192,.45),rgba(53,242,192,0));
}
.step-num{
  width:66px;height:66px;border-radius:var(--r-md);
  display:grid;place-items:center;
  background:rgba(123,140,255,.13);
  border:1px solid rgba(123,140,255,.32);
  color:var(--text-hi);font-weight:800;font-size:20px;
  font-variant-numeric:tabular-nums;
}
.step-body{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;backdrop-filter:blur(14px);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.step-body:hover{border-color:rgba(53,242,192,.32);transform:translateY(-2px);box-shadow:var(--sh-card)}
.step-body h3{margin-bottom:8px}
.step-body p{font-size:15px;color:var(--text-mid)}
.step-tip{
  display:flex;gap:8px;margin-top:14px;padding-top:14px;
  border-top:1px dashed var(--line);font-size:14px;color:var(--text-low);
}
.step-tip strong{color:var(--hot);font-weight:700;flex-shrink:0}

/* ============ 条目卡片 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.entry-card{
  display:flex;flex-direction:column;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.entry-card:nth-child(even){margin-top:24px}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.32);box-shadow:var(--sh-hover)}
.thumb{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,rgba(53,242,192,.16),rgba(123,140,255,.2) 60%,rgba(16,29,51,.9));
}
.thumb::before{
  content:attr(data-mark);
  position:absolute;inset:0;display:grid;place-items:center;
  font-size:40px;font-weight:800;color:rgba(234,242,255,.28);
  letter-spacing:2px;
}
.thumb img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.entry-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.entry-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.entry-index{
  font-size:13px;font-weight:800;color:var(--accent-2);letter-spacing:1px;
  font-variant-numeric:tabular-nums;
}
.entry-body h3{font-size:19px}
.entry-body p{font-size:15px;color:var(--text-mid)}
.entry-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.entry-time{font-size:13px;color:var(--text-low)}
.entry-link{
  font-size:14px;font-weight:700;color:var(--accent);
  display:inline-flex;align-items:center;gap:6px;
}
.entry-link::after{content:"→";transition:transform .2s ease}
.entry-link:hover::after{transform:translateX(4px)}

/* ============ 对照列表 ============ */
.compare{
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:var(--glass);backdrop-filter:blur(14px);
}
.compare-row{
  display:grid;grid-template-columns:200px 1fr 1fr;gap:18px;
  padding:20px 24px;border-bottom:1px solid var(--line);
  align-items:start;transition:background .2s ease,padding-left .2s ease;
}
.compare-row:last-child{border-bottom:none}
.compare-row:hover{background:var(--glass-2);padding-left:28px}
.compare-head{
  background:rgba(123,140,255,.1);
  font-size:13px;font-weight:700;letter-spacing:1px;color:var(--text-hi);
}
.compare-head:hover{background:rgba(123,140,255,.1);padding-left:24px}
.compare-key{color:var(--text-hi);font-weight:700;font-size:15px}
.compare-val{font-size:15px;color:var(--text-mid)}
.compare-val.is-good{color:var(--accent)}
.compare-val.is-warn{color:var(--hot)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--glass);backdrop-filter:blur(14px);
  overflow:hidden;transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item[open]{border-color:rgba(53,242,192,.32);box-shadow:var(--sh-card)}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:20px 56px 20px 24px;color:var(--text-hi);
  font-size:16px;font-weight:700;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;
  width:12px;height:12px;margin-top:-8px;
  border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(45deg);transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:-2px}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  background:var(--accent);border-radius:0 3px 3px 0;
  opacity:0;transition:opacity .25s ease;
}
.faq-item[open] summary::before{opacity:1}
.faq-item summary:hover{background:rgba(255,255,255,.03)}
.faq-answer{padding:0 24px 22px;font-size:15px;color:var(--text-mid)}
.faq-answer p+p{margin-top:10px}

/* ============ CTA 条 ============ */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:30px 32px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(53,242,192,.1),rgba(123,140,255,.1) 70%,rgba(255,255,255,.04));
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  flex-wrap:wrap;
}
.cta-copy{max-width:620px}
.cta-copy h3{margin-bottom:8px}
.cta-copy p{font-size:15px;color:var(--text-mid)}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.share-group{display:flex;align-items:center;gap:8px}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--glass);border:1px solid var(--line);
  color:var(--text-mid);font-size:14px;cursor:pointer;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.share-btn:hover{color:var(--text-hi);border-color:rgba(53,242,192,.4);background:var(--glass-2)}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:40px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,19,34,.85),rgba(5,10,20,1));
  padding:64px 0 28px;
}
.footer-top{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid var(--line);
}
.footer-brand .brand-name{display:block;font-size:18px;font-weight:800;color:var(--text-hi);margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--text-mid);max-width:420px}
.footer-note{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text-hi)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--text-mid)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-top:24px;flex-wrap:wrap;font-size:13px;color:var(--text-low);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--container:100%}
  .nav-menu{gap:2px}
  .nav-link{padding:9px 11px;font-size:14px}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:991px){
  :root{--section-y:64px}
  .nav-menu,.nav-actions .btn-text{display:none}
  .burger{display:block}
  .header-inner{height:56px}
  .brand-mark{width:34px;height:34px;font-size:15px}
  .cat-hero{min-height:420px;padding:48px 0 44px}
  .entry-grid{grid-template-columns:1fr}
  .entry-card:nth-child(even){margin-top:0}
  .compare-row{grid-template-columns:160px 1fr;}
  .compare-row .compare-val:last-child{grid-column:2}
  .compare-head{display:none}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--section-y:48px}
  .container{padding:0 18px}
  body{font-size:15px}
  p{font-size:15px}
  .cat-hero{min-height:380px;padding:40px 0 38px}
  .hero-cta{gap:10px}
  .hero-cta .btn{width:100%}
  .step{grid-template-columns:54px 1fr;gap:16px}
  .step-num{width:54px;height:54px;border-radius:14px;font-size:18px}
  .step:not(:last-child)::after{left:26px;top:56px}
  .step-body{padding:18px}
  .compare-row{grid-template-columns:1fr;gap:8px;padding:18px}
  .compare-row .compare-val:last-child{grid-column:auto}
  .compare-row:hover{padding-left:18px}
  .cta-bar{padding:24px 20px;flex-direction:column;align-items:stretch}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .share-group{width:100%;display:grid;grid-template-columns:repeat(3,1fr)}
  .share-btn{width:100%;justify-content:center;padding:0 8px}
  .footer-top{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:479px){
  .brand-sub{display:none}
  .brand-name{font-size:15px}
  .cat-hero h1{font-size:26px}
  .section-head .eyebrow{font-size:12px}
  .entry-body{padding:18px}
  .faq-item summary{padding:16px 48px 16px 18px;font-size:15px}
  .faq-answer{padding:0 18px 18px}
}

/* roulang page: category2 */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1322;
  --bg-700:#101D33;
  --line:rgba(122,196,255,.14);
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.09);
  --accent:#35F2C0;
  --accent-2:#7B8CFF;
  --hot:#FFB020;
  --danger:#FF5C6C;
  --text-hi:#EAF2FF;
  --text-mid:#9FB3CC;
  --text-low:#64748B;
  --inverse:#041018;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 48px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(53,242,192,.35),0 0 26px rgba(53,242,192,.26);
  --sect:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-hi);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;top:0;left:0;right:0;height:2px;z-index:80;pointer-events:none;
  background:linear-gradient(90deg,var(--accent),rgba(53,242,192,.35) 32%,rgba(53,242,192,0) 72%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(rgba(122,196,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(122,196,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:2}
@media (min-width:1600px){.container{max-width:1280px}}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(5,10,20,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--accent),rgba(122,196,255,.18) 38%,rgba(122,196,255,.05) 70%,transparent);
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:var(--r-sm);
  display:grid;place-items:center;font-size:16px;font-weight:800;color:var(--inverse);
  background:linear-gradient(135deg,var(--accent),#1fc9a4);
  box-shadow:0 0 18px rgba(53,242,192,.28);
}
.brand-text{font-size:16px;font-weight:800;letter-spacing:.4px;color:var(--text-hi);white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
  border-radius:var(--r-pill);font-size:14.5px;color:var(--text-mid);transition:color .2s,background .2s;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-hi);background:var(--glass-2);box-shadow:var(--glow)}
.nav-link.is-active::after{display:none}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:8px}
.btn-text{font-size:14px;color:var(--text-mid);display:inline-flex;align-items:center;gap:8px;transition:color .2s}
.btn-text::before{content:"›";color:var(--accent);font-size:16px;line-height:1}
.btn-text:hover{color:var(--text-hi)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--glass);align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--text-hi);border-radius:2px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;letter-spacing:.3px;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .22s ease,filter .22s ease,border-color .22s ease,background .22s ease;
}
.btn-primary{background:var(--accent);color:var(--inverse);box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,242,192,.42),0 0 32px rgba(53,242,192,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--accent);box-shadow:0 0 18px rgba(53,242,192,.16)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed}
.btn .spinner{
  width:14px;height:14px;border-radius:50%;border:2px solid rgba(4,16,24,.3);border-top-color:var(--inverse);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============ hero / banner ============ */
.cat-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-banner .banner-bg{position:absolute;inset:0}
.cat-banner .banner-bg img{width:100%;height:100%;object-fit:cover}
.cat-banner .banner-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,.72) 0%,rgba(5,10,20,.86) 46%,rgba(5,10,20,.96) 100%),
             linear-gradient(90deg,rgba(10,19,34,.95) 0%,rgba(5,10,20,.55) 60%,rgba(5,10,20,.4) 100%);
}
.banner-inner{position:relative;z-index:2;padding:64px 0 52px}
.crumbs{font-size:13px;color:var(--text-low);display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px}
.crumbs a{color:var(--text-mid);transition:color .2s}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:var(--text-low)}
.crumbs .current{color:var(--text-low)}
.cat-banner h1{font-size:clamp(28px,4.2vw,46px);max-width:860px}
.banner-sub{margin-top:18px;max-width:720px;font-size:16.5px;color:var(--text-mid);line-height:1.85}
.banner-meta{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;margin-top:24px;font-size:13.5px;color:var(--text-low)}
.banner-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block;margin-right:8px;vertical-align:middle}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

/* ============ sections ============ */
.section{padding:var(--sect) 0;position:relative}
.section.alt{background:linear-gradient(180deg,rgba(16,29,51,.42),rgba(5,10,20,0))}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(22px,3vw,32px)}
.section-head p{margin-top:14px;color:var(--text-mid);font-size:15.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--accent);
  letter-spacing:1px;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--accent)}

/* ============ version cards ============ */
.version-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.v-card{
  display:flex;flex-direction:column;border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.version-grid > .v-card:nth-child(even){margin-top:24px}
.v-card:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.32);box-shadow:var(--sh-hover)}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#12203a,#0a1322 60%,#123a34)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.v-card:hover .thumb img{transform:scale(1.04)}
.thumb .num{
  position:absolute;top:14px;left:14px;width:34px;height:34px;border-radius:var(--r-sm);
  display:grid;place-items:center;font-size:14px;font-weight:800;color:var(--text-hi);
  background:rgba(123,140,255,.22);border:1px solid rgba(123,140,255,.4);backdrop-filter:blur(6px);
}
.v-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.v-body h3{font-size:18.5px}
.v-body p{color:var(--text-mid);font-size:15px;line-height:1.8}
.v-tags{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:1.7;color:var(--text-mid);background:var(--glass-2);border:1px solid var(--line);
}
.chip-purple{color:#C3CBFF;background:rgba(123,140,255,.16);border-color:rgba(123,140,255,.32)}
.chip-green{color:#A9F6DF;background:rgba(53,242,192,.13);border-color:rgba(53,242,192,.3)}
.chip-hot{color:#FFD79A;background:rgba(255,176,32,.14);border-color:rgba(255,176,32,.32)}
.v-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--text-low);
}
.v-foot .read{color:var(--accent);display:inline-flex;align-items:center;gap:6px}
.v-foot .read::after{content:"›";font-size:16px;line-height:1}
.v-card:hover .v-foot .read{text-decoration:underline;text-underline-offset:4px}

/* ============ compare table ============ */
.compare{
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);overflow:hidden;box-shadow:var(--sh-card);
}
.compare-row{
  display:grid;grid-template-columns:1.05fr 1fr 1.1fr 1.9fr;gap:18px;
  padding:18px 24px;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-mid);
  transition:background .2s ease,transform .2s ease;
}
.compare-row:last-child{border-bottom:0}
.compare-row:hover{background:var(--glass-2)}
.compare-row strong{color:var(--text-hi);font-weight:700}
.compare-head{
  background:rgba(123,140,255,.1);font-size:13.5px;letter-spacing:.6px;color:var(--text-hi);
  text-transform:none;font-weight:700;
}
.compare-head:hover{background:rgba(123,140,255,.1)}
.compare-note{margin-top:16px;font-size:13.5px;color:var(--text-low)}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{
  position:relative;padding:24px 22px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.step:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.3);box-shadow:var(--sh-hover)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:13px;letter-spacing:1px;color:var(--accent);margin-bottom:12px;font-weight:700;
}
.step h3{font-size:17px;margin-bottom:10px}
.step p{font-size:14.6px;color:var(--text-mid);line-height:1.8}

/* ============ checklist ============ */
.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 24px}
.check-item{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.check-item:hover{background:var(--glass-2);transform:translateX(4px);border-color:rgba(53,242,192,.26)}
.check-item .mark{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;margin-top:4px;
  border:1px solid rgba(53,242,192,.5);color:var(--accent);font-size:12px;display:grid;place-items:center;
}
.check-item h4{font-size:16px;margin-bottom:6px}
.check-item p{font-size:14.6px;color:var(--text-mid);line-height:1.8}

/* ============ cross links ============ */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cross-card{
  padding:26px 24px;border-radius:var(--r-md);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  display:flex;flex-direction:column;gap:12px;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.cross-card:hover{transform:translateY(-4px);border-color:rgba(123,140,255,.4);box-shadow:var(--sh-hover)}
.cross-card h3{font-size:18px}
.cross-card p{font-size:14.8px;color:var(--text-mid)}
.cross-card .cross-link{margin-top:auto;color:var(--accent);font-size:14px;display:inline-flex;gap:6px;align-items:center}
.cross-card .cross-link::after{content:"›";font-size:16px}
.cross-card:hover .cross-link{text-decoration:underline;text-underline-offset:4px}

/* ============ faq ============ */
.faq-wrap{display:grid;grid-template-columns:1fr;gap:14px;max-width:900px}
.faq-item{
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  overflow:hidden;transition:border-color .22s ease,background .22s ease;
}
.faq-item[open]{border-color:rgba(53,242,192,.34);background:var(--glass-2)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 56px 20px 24px;position:relative;
  font-size:16.5px;font-weight:700;color:var(--text-hi);border-left:3px solid transparent;transition:border-color .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;width:12px;height:12px;margin-top:-7px;
  border-right:2px solid var(--text-mid);border-bottom:2px solid var(--text-mid);
  transform:rotate(45deg);transition:transform .24s ease,border-color .24s ease;
}
.faq-item[open] summary{border-left-color:var(--accent)}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--accent)}
.faq-item .faq-a{padding:0 24px 22px 24px;color:var(--text-mid);font-size:15px;line-height:1.85}

/* ============ CTA ============ */
.cta-bar{
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(123,140,255,.14),rgba(53,242,192,.1) 55%,rgba(255,255,255,.04));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:34px 36px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  box-shadow:var(--sh-card);
}
.cta-left{max-width:560px}
.cta-left h2{font-size:clamp(20px,2.4vw,26px)}
.cta-left p{margin-top:12px;color:var(--text-mid);font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.share-group{display:flex;gap:10px}
.share-btn{
  width:42px;height:42px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--glass);
  display:grid;place-items:center;font-size:13px;color:var(--text-mid);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.share-btn:hover{border-color:var(--accent);color:var(--text-hi);transform:translateY(-2px)}

/* ============ footer ============ */
.site-footer{
  border-top:1px solid var(--line);margin-top:20px;
  background:linear-gradient(180deg,rgba(10,19,34,.85),rgba(5,10,20,.98));
  padding:64px 0 32px;position:relative;z-index:2;
}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand-name{font-size:17px;font-weight:800;display:block;margin-bottom:14px;color:var(--text-hi)}
.footer-brand p{color:var(--text-mid);font-size:14.5px;max-width:360px}
.footer-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text-hi)}
.footer-col ul{display:flex;flex-direction:column;gap:2px}
.footer-col li a{
  display:block;padding:7px 0 7px 0;font-size:14.5px;color:var(--text-mid);
  transition:color .2s ease,transform .2s ease;
}
.footer-col li a:hover{color:var(--text-hi);transform:translateX(4px)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--text-low);
}

/* ============ drawer ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,7,14,.66);z-index:90;
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:100;
  background:rgba(10,19,34,.96);backdrop-filter:blur(16px);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .3s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:20px 0 28px;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 20px 18px;border-bottom:1px solid var(--line)}
.drawer-head span{font-size:15px;font-weight:800}
.drawer-close{width:36px;height:36px;border-radius:var(--r-sm);border:1px solid var(--line);display:grid;place-items:center;color:var(--text-mid)}
.drawer-close:hover{color:var(--text-hi);border-color:var(--accent)}
.drawer-nav{display:flex;flex-direction:column;padding:12px 0}
.drawer-nav a{
  height:52px;display:flex;align-items:center;padding:0 20px;font-size:15.5px;color:var(--text-mid);
  border-left:3px solid transparent;
}
.drawer-nav a:hover{color:var(--text-hi);background:var(--glass)}
.drawer-nav a.is-active{color:var(--text-hi);border-left-color:var(--accent);background:var(--glass-2)}
.drawer-cta{padding:18px 20px 0;margin-top:auto;display:flex;flex-direction:column;gap:12px}

/* ============ responsive ============ */
@media (max-width:1199px){
  .cross-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr}
  .footer-col:last-child{grid-column:span 1}
}
@media (max-width:991px){
  :root{--sect:64px}
  .nav-menu,.header-actions .btn-text,.header-actions .btn{display:none}
  .nav-toggle{display:flex}
  .header-inner{height:56px}
  .banner-inner{padding:48px 0 40px}
  .version-grid{grid-template-columns:1fr}
  .version-grid > .v-card:nth-child(even){margin-top:0}
  .compare-row{grid-template-columns:1fr 1fr;gap:10px 18px;padding:16px 20px}
  .compare-head{display:none}
  .compare-row > span::before{
    content:attr(data-label);display:block;font-size:12.5px;color:var(--text-low);margin-bottom:2px;
  }
  .checklist{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .container{padding:0 18px}
  .brand-text{font-size:15px}
  .cat-banner h1{font-size:27px}
  .banner-sub{font-size:15.5px}
  .steps{grid-template-columns:1fr}
  .cross-grid{grid-template-columns:1fr}
  .compare-row{grid-template-columns:1fr;padding:16px 18px}
  .compare-row > span{padding-bottom:8px;border-bottom:1px dashed rgba(122,196,255,.14)}
  .compare-row > span:last-child{border-bottom:0}
  .cta-bar{padding:26px 22px;border-radius:var(--r-md)}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .share-group{width:100%;justify-content:flex-start}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:6px}
  .banner-actions .btn{flex:1 1 100%}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .site-footer{padding:48px 0 26px}
  .v-body{padding:18px 18px 20px}
  .v-body h3{font-size:17px}
  .faq-item summary{padding:18px 48px 18px 18px;font-size:15.5px}
  .faq-item .faq-a{padding:0 18px 20px 18px;font-size:14.8px}
  .btn{height:44px;padding:0 20px;font-size:14.5px}
}

/* roulang page: category3 */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1322;
  --bg-700:#101D33;
  --line:rgba(122,196,255,.14);
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.09);
  --accent:#35F2C0;
  --accent-2:#7B8CFF;
  --hot:#FFB020;
  --danger:#FF5C6C;
  --text-hi:#EAF2FF;
  --text-mid:#9FB3CC;
  --text-low:#64748B;
  --inverse:#041018;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 48px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(53,242,192,.35),0 0 26px rgba(53,242,192,.26);
  --maxw:1200px;
  --space-section:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg-900);
  color:var(--text-mid);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(122,196,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(122,196,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.85;
}
body::after{
  content:"";
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:60;
  background:linear-gradient(90deg,var(--accent),rgba(53,242,192,.25) 35%,transparent 70%);
  pointer-events:none;
}
body.no-scroll{overflow:hidden;}
h1,h2,h3,h4{
  color:var(--text-hi);
  font-weight:800;
  line-height:1.25;
  margin:0 0 14px;
  letter-spacing:.2px;
}
h1{font-size:clamp(28px,4.2vw,46px);}
h2{font-size:clamp(22px,3vw,32px);}
h3{font-size:19px;font-weight:700;}
h4{font-size:16px;font-weight:700;}
p{margin:0 0 16px;}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease;}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
.section{padding:var(--space-section) 0;position:relative;z-index:1;}
.section-head{max-width:760px;margin-bottom:38px;}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.16em;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-head .eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--accent);
  border-radius:2px;
}
.section-head p{color:var(--text-mid);font-size:16px;margin:0;}
.muted{color:var(--text-low);font-size:14px;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  height:68px;
  background:rgba(5,10,20,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,var(--accent) 0%,rgba(53,242,192,.35) 26%,transparent 62%);
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:34px;height:34px;
  border-radius:var(--r-sm);
  display:grid;
  place-items:center;
  background:linear-gradient(140deg,rgba(53,242,192,.18),rgba(123,140,255,.2));
  border:1px solid var(--line);
  color:var(--accent);
}
.logo-mark svg{width:19px;height:19px;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text .brand-name{
  color:var(--text-hi);
  font-size:16px;
  font-weight:800;
  letter-spacing:.4px;
}
.logo-text .brand-sub{
  font-size:11px;
  letter-spacing:.28em;
  color:var(--text-low);
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  padding:9px 14px;
  border-radius:var(--r-pill);
  font-size:15px;
  color:var(--text-mid);
  white-space:nowrap;
  transition:color .22s ease,background .22s ease,box-shadow .22s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:2px;
  width:0;height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:translateX(-50%);
  transition:width .24s ease;
}
.nav-link:hover{color:var(--text-hi);}
.nav-link:hover::after{width:20px;}
.nav-link.is-active{
  color:var(--text-hi);
  background:var(--glass-2);
  box-shadow:var(--glow);
}
.nav-link.is-active::after{width:22px;}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  padding:11px 22px;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background-color .22s ease,border-color .22s ease,filter .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent);
  color:var(--inverse);
  box-shadow:var(--glow);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,242,192,.45),0 0 32px rgba(53,242,192,.34);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text-hi);
}
.btn-ghost:hover{border-color:rgba(53,242,192,.55);box-shadow:0 0 0 1px rgba(53,242,192,.18),0 0 18px rgba(53,242,192,.14);}
.btn-ghost:active{transform:translateY(1px);}
.btn-text{
  background:none;
  border:none;
  color:var(--text-mid);
  padding:10px 6px;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  cursor:pointer;
}
.btn-text::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-2);}
.btn-text:hover{color:var(--text-hi);}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;}
.btn.is-loading{position:relative;color:transparent;}
.btn.is-loading::after{
  content:"";
  position:absolute;
  width:16px;height:16px;
  border-radius:50%;
  border:2px solid rgba(4,16,24,.35);
  border-top-color:var(--inverse);
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg);}}
.burger{
  display:none;
  width:42px;height:38px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--glass);
  cursor:pointer;
  place-items:center;
}
.burger span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";
  position:absolute;left:0;
  width:18px;height:2px;background:var(--text-hi);border-radius:2px;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

/* ---------- Mobile drawer ---------- */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(2,6,14,.7);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s ease,visibility .28s ease;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(86vw,340px);
  height:100%;
  background:rgba(10,19,34,.96);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .32s cubic-bezier(.4,0,.2,1);
  z-index:80;
  padding:22px 20px 32px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-head .brand-name{color:var(--text-hi);font-weight:800;font-size:15px;}
.drawer-close{
  width:36px;height:36px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-hi);
  font-size:18px;
  line-height:1;
  cursor:pointer;
}
.drawer-link{
  display:flex;
  align-items:center;
  height:52px;
  padding-left:16px;
  border-left:3px solid transparent;
  border-bottom:1px solid var(--line);
  color:var(--text-mid);
  font-size:16px;
  transition:color .2s ease,border-color .2s ease; 
}
.drawer-link:hover{color:var(--text-hi);}
.drawer-link.is-active{
  color:var(--text-hi);
  border-left-color:var(--accent);
  background:var(--glass);
}
.drawer-cta{margin-top:24px;display:grid;gap:12px;}
.drawer-cta .btn{width:100%;}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;
  padding:86px 0 72px;
  background-image:linear-gradient(180deg,rgba(5,10,20,.86),rgba(5,10,20,.94)),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:420px;height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(123,140,255,.18),transparent 68%);
  pointer-events:none;
}
.crumbs{
  font-size:13px;
  color:var(--text-low);
  margin-bottom:18px;
}
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumbs a{color:var(--text-mid);}
.crumbs a:hover{color:var(--accent);}
.crumbs .sep{color:var(--text-low);}
.crumbs .current{color:var(--text-low);}
.hero-grid{
  display:grid;
  grid-template-columns:1.4fr .9fr;
  gap:44px;
  align-items:center;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--accent);
  background:rgba(53,242,192,.09);
  border:1px solid rgba(53,242,192,.24);
  margin-bottom:18px;
}
.page-hero h1{margin-bottom:16px;}
.page-hero .lead{
  font-size:17px;
  color:var(--text-mid);
  max-width:620px;
  margin-bottom:22px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  font-size:14px;
  color:var(--text-low);
}
.hero-meta strong{color:var(--text-hi);font-weight:700;}
.hero-side{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  overflow:hidden;
}
.hero-side .thumb{
  position:relative;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,rgba(53,242,192,.22),rgba(123,140,255,.28));
}
.hero-side .thumb img{width:100%;height:100%;object-fit:cover;}
.hero-side .side-body{padding:20px 22px 24px;}
.hero-side .side-body h3{margin-bottom:10px;}
.hero-side .side-body p{margin:0 0 14px;font-size:15px;}
.side-list{display:grid;gap:10px;}
.side-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--text-mid);
  align-items:flex-start;
}
.side-list li::before{
  content:"";
  width:6px;height:6px;
  margin-top:9px;
  border-radius:50%;
  background:var(--accent-2);
  flex-shrink:0;
}

/* ---------- Topic cards ---------- */
.topic-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.topic-grid .topic-card:nth-child(even){transform:translateY(24px);}
.topic-grid .topic-card:nth-child(even):hover{transform:translateY(20px);}
.topic-card{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
  display:flex;
  flex-direction:column;
}
.topic-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-hover);
  border-color:rgba(53,242,192,.32);
}
.topic-card .thumb{
  position:relative;
  aspect-ratio:3/2;
  background:linear-gradient(140deg,rgba(53,242,192,.18),rgba(123,140,255,.26));
}
.topic-card .thumb img{width:100%;height:100%;object-fit:cover;}
.topic-card .index{
  position:absolute;
  left:14px;top:14px;
  min-width:38px;
  padding:5px 10px;
  border-radius:var(--r-pill);
  font-size:13px;
  font-weight:700;
  color:var(--text-hi);
  background:rgba(5,10,20,.7);
  border:1px solid rgba(123,140,255,.42);
  backdrop-filter:blur(6px);
}
.topic-card .card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.topic-card h3{margin-bottom:10px;font-size:18px;}
.topic-card p{font-size:15px;color:var(--text-mid);margin-bottom:16px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 11px;
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--text-mid);
  background:rgba(123,140,255,.14);
  border:1px solid rgba(123,140,255,.22);
}
.tag.hot{color:var(--hot);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.28);}
.tag.green{color:var(--accent);background:rgba(53,242,192,.1);border-color:rgba(53,242,192,.26);}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-low);
}
.card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--accent);
  font-weight:600;
  font-size:14px;
}
.card-link:hover{color:var(--text-hi);}
.card-link::after{content:"›";font-size:16px;line-height:1;}

/* ---------- Steps ---------- */
.steps-wrap{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:18px;
  counter-reset:step;
}
.step-item{
  position:relative;
  padding:24px 20px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.step-item:hover{transform:translateY(-4px);border-color:rgba(53,242,192,.3);box-shadow:var(--sh-card);}
.step-num{
  display:inline-grid;
  place-items:center;
  width:36px;height:36px;
  border-radius:var(--r-sm);
  background:rgba(123,140,255,.16);
  border:1px solid rgba(123,140,255,.3);
  color:var(--accent-2);
  font-weight:800;
  font-size:15px;
  margin-bottom:14px;
}
.step-item:first-child .step-num{
  color:var(--accent);
  border-color:rgba(53,242,192,.4);
  box-shadow:0 0 18px rgba(53,242,192,.24);
}
.step-item h3{font-size:16px;margin-bottom:8px;}
.step-item p{font-size:14px;margin:0;color:var(--text-mid);}

/* ---------- FAQ ---------- */
.qa-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.qa-item{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  overflow:hidden;
  transition:border-color .24s ease,box-shadow .24s ease;
}
.qa-item[open]{
  border-color:rgba(53,242,192,.34);
  box-shadow:0 0 0 1px rgba(53,242,192,.14);
}
.qa-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 24px 20px 28px;
  position:relative;
  font-size:16px;
  font-weight:600;
  color:var(--text-hi);
  line-height:1.6;
}
.qa-item summary::-webkit-details-marker{display:none;}
.qa-item summary::before{
  content:"";
  position:absolute;
  left:0;top:12px;bottom:12px;
  width:3px;
  border-radius:3px;
  background:transparent;
  transition:background .24s ease,box-shadow .24s ease;
}
.qa-item[open] summary::before{
  background:var(--accent);
  box-shadow:0 0 14px rgba(53,242,192,.5);
}
.qa-item summary::after{
  content:"+";
  position:absolute;
  right:22px;top:50%;
  transform:translateY(-50%);
  color:var(--text-low);
  font-size:20px;
  font-weight:400;
  transition:color .24s ease,transform .24s ease;
}
.qa-item[open] summary::after{content:"−";color:var(--accent);}
.qa-body{padding:0 24px 22px 28px;font-size:15px;color:var(--text-mid);}
.qa-body p:last-child{margin-bottom:0;}

/* ---------- Cross links ---------- */
.cross-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:24px;
}
.panel{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  padding:26px;
  box-shadow:var(--sh-card);
}
.panel h3{margin-bottom:12px;}
.link-list{display:grid;gap:4px;margin-top:6px;}
.link-list li{border-bottom:1px solid var(--line);}
.link-list li:last-child{border-bottom:none;}
.link-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:15px 12px;
  border-radius:var(--r-sm);
  color:var(--text-mid);
  font-size:15px;
  transition:background .22s ease,transform .22s ease,color .22s ease;
}
.link-list a:hover{
  background:var(--glass-2);
  transform:translateX(4px);
  color:var(--text-hi);
}
.link-list .arrow{color:var(--accent);font-size:16px;}
.stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:6px;}
.stat{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  padding:18px;
}
.stat .num{font-size:26px;font-weight:800;color:var(--accent);line-height:1.2;}
.stat .label{font-size:13px;color:var(--text-low);margin-top:6px;}

/* ---------- CTA band ---------- */
.cta-band{padding:0 0 var(--space-section);position:relative;z-index:1;}
.cta-inner{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(53,242,192,.09),rgba(123,140,255,.12) 60%,rgba(255,255,255,.03));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  padding:34px 36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px;}
.cta-inner p{margin:0;font-size:15px;color:var(--text-mid);}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.share-group{display:flex;align-items:center;gap:8px;}
.share-btn{
  width:42px;height:42px;
  display:grid;
  place-items:center;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-mid);
  cursor:pointer;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.share-btn:hover{color:var(--accent);border-color:rgba(53,242,192,.4);transform:translateY(-2px);}
.share-btn svg{width:18px;height:18px;}
.copy-tip{
  font-size:13px;
  color:var(--accent);
  min-height:18px;
  margin-left:4px;
}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-800);
  padding:64px 0 28px;
  position:relative;
  z-index:1;
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:34px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand .brand-name{
  display:block;
  color:var(--text-hi);
  font-size:17px;
  font-weight:800;
  margin-bottom:14px;
}
.footer-brand p{font-size:14px;color:var(--text-mid);max-width:380px;}
.footer-note{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--text-mid);
  background:var(--glass);
  border:1px solid var(--line);
}
.chip-green{color:var(--accent);border-color:rgba(53,242,192,.28);background:rgba(53,242,192,.08);}
.footer-col h4{
  font-size:15px;
  margin-bottom:16px;
  color:var(--text-hi);
}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--text-mid);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  padding-top:22px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-low);
}

/* ---------- Responsive ---------- */
@media (min-width:1600px){
  :root{--maxw:1280px;}
}
@media (max-width:1199px){
  :root{--space-section:72px;}
  .hero-grid{grid-template-columns:1.2fr .9fr;gap:32px;}
  .steps-wrap{grid-template-columns:repeat(3,minmax(0,1fr));}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .footer-top .footer-col:last-child{grid-column:auto;}
}
@media (max-width:991px){
  :root{--space-section:64px;}
  .site-header{height:56px;}
  .header-inner{height:56px;}
  .nav-menu,.header-actions .btn-text{display:none;}
  .burger{display:grid;}
  .header-actions{gap:10px;}
  .header-actions .btn{padding:9px 16px;font-size:14px;}
  .page-hero{padding:62px 0 54px;}
  .hero-grid{grid-template-columns:1fr;gap:28px;}
  .hero-side{max-width:520px;}
  .topic-grid{gap:20px;}
  .qa-grid{grid-template-columns:1fr;}
  .cross-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767px){
  :root{--space-section:48px;}
  .container{padding:0 18px;}
  body{font-size:15px;line-height:1.8;}
  .site-header{background:rgba(5,10,20,.94);}
  .logo-text .brand-sub{display:none;}
  .logo-text .brand-name{font-size:15px;}
  .logo-mark{width:30px;height:30px;}
  .page-hero{padding:48px 0 44px;}
  .page-hero .lead{font-size:16px;}
  .hero-meta{gap:12px;font-size:13px;}
  .topic-grid{grid-template-columns:1fr;}
  .topic-grid .topic-card:nth-child(even){transform:none;}
  .topic-grid .topic-card:nth-child(even):hover{transform:translateY(-4px);}
  .steps-wrap{grid-template-columns:1fr;}
  .cta-inner{padding:26px 22px;flex-direction:column;align-items:stretch;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .share-group{justify-content:flex-start;}
  .footer-top{grid-template-columns:1fr;gap:24px;padding-bottom:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .hero-side .side-body{padding:18px;}
  .panel{padding:20px;}
  .stat-grid{grid-template-columns:1fr 1fr;gap:12px;}
}
@media (max-width:519px){
  .container{padding:0 16px;}
  h1{font-size:26px;}
  h2{font-size:21px;}
  .section-head{margin-bottom:26px;}
  .qa-item summary{padding:16px 18px 16px 22px;font-size:15px;}
  .qa-body{padding:0 18px 18px 22px;}
  .topic-card .card-body{padding:16px 16px 18px;}
  .btn{padding:10px 18px;font-size:14px;}
  .stat .num{font-size:22px;}
  .share-btn{width:38px;height:38px;}
  .copy-tip{width:100%;margin-left:0;}
}