/* roulang page: index */
:root{
  --cyan:#1FD9C4;
  --cyan-lt:#5BF0DD;
  --violet:#7A5CFF;
  --amber:#FFB35C;
  --ink-900:#050A12;
  --ink-800:#08111E;
  --ink-700:#0D1B2C;
  --ink-600:#14263C;
  --line:rgba(120,180,220,.14);
  --text:#E8F3F7;
  --text-2:#A9BECD;
  --text-3:#6E8698;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow-glass:0 18px 40px -20px rgba(0,0,0,.8);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--cyan-lt)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.22;color:var(--text)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1500px){.container{max-width:1280px}}
@media (max-width:768px){.container{padding:0 16px}}

/* ---------- 通用组件 ---------- */
.glass{
  background:rgba(13,27,44,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-glass);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{
  color:#04191A;
  background:linear-gradient(120deg,var(--cyan),#3fe0d2 45%,var(--violet));
  box-shadow:0 0 0 1px rgba(31,217,196,.6),0 10px 30px -8px rgba(31,217,196,.55);
}
.btn-primary:hover{color:#04191A;filter:brightness(1.08);box-shadow:0 0 0 1px rgba(91,240,221,.85),0 14px 36px -6px rgba(31,217,196,.7)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--cyan);background:rgba(31,217,196,.04);border-color:rgba(31,217,196,.5);
}
.btn-ghost:hover{color:var(--cyan-lt);background:rgba(31,217,196,.1);border-color:var(--cyan-lt)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:13.5px}
.btn:focus-visible,a:focus-visible,summary:focus-visible,.tab:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:10px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;font-size:13px;color:var(--text-2);
  background:rgba(20,38,60,.7);border:1px solid var(--line);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;
  color:var(--cyan);background:rgba(31,217,196,.1);border:1px solid rgba(31,217,196,.32);
}
.badge-violet{color:#C3B6FF;background:rgba(122,92,255,.14);border-color:rgba(122,92,255,.38)}
.badge-amber{color:var(--amber);background:rgba(255,179,92,.12);border-color:rgba(255,179,92,.36)}
.sec{padding:100px 0;position:relative}
@media (max-width:768px){.sec{padding:60px 0}}
.sec-head{max-width:720px;margin-bottom:34px}
.sec-head h2{font-size:34px;margin-bottom:14px}
.sec-head p{color:var(--text-2);font-size:16.5px}
@media (max-width:768px){.sec-head h2{font-size:24px}.sec-head{margin-bottom:26px}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--cyan);letter-spacing:.08em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.glow-spot{
  position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none;z-index:0;
}
.spot-cyan{background:radial-gradient(circle,rgba(31,217,196,.42),transparent 68%)}
.spot-violet{background:radial-gradient(circle,rgba(122,92,255,.36),transparent 68%)}
.grid-tex{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(120,180,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,220,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:rgba(5,10,18,.9);
  border-bottom:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar .tb-domain{color:var(--text-2);letter-spacing:.06em;font-family:var(--mono)}
.topbar .tb-mid{color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .tb-right{display:flex;align-items:center;gap:18px}
.topbar a{color:var(--cyan)}
@media (max-width:768px){.topbar .tb-mid{display:none}}
@media (max-width:520px){.topbar .tb-right span{display:none}}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,18,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.site-header.scrolled{
  box-shadow:0 1px 0 rgba(31,217,196,.55),0 20px 40px -30px rgba(0,0,0,.9);
  border-bottom-color:rgba(31,217,196,.28);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.logo{display:flex;align-items:center;gap:11px;color:var(--text);font-weight:800;font-size:17px;letter-spacing:-.01em}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 34px;
  background:linear-gradient(135deg,var(--cyan),var(--violet));
  display:grid;place-items:center;color:#04191A;font-weight:900;font-size:15px;
  box-shadow:0 0 0 1px rgba(31,217,196,.5),0 8px 20px -8px rgba(31,217,196,.7);
}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;padding:9px 15px;border-radius:10px;color:var(--text-2);
  font-size:14.5px;font-weight:600;transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(20,38,60,.7)}
.nav-links a.active{color:var(--cyan)}
.nav-links a.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-4px;
  width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(20,38,60,.6);cursor:pointer;padding:0;place-items:center;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);margin:3px auto;transition:.22s var(--ease)}
.burger.open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
@media (max-width:1023px){
  .nav-links,.nav-cta .btn{display:none}
  .burger{display:grid}
}
/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;display:none;
  background:rgba(5,10,18,.94);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  padding:96px 24px 120px;
}
.drawer.show{display:block;animation:fadeIn .22s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.drawer nav{display:flex;flex-direction:column;gap:8px;max-width:520px;margin:0 auto}
.drawer nav a{
  font-size:22px;font-weight:800;color:var(--text);padding:16px 18px;border-radius:14px;
  border:1px solid transparent;transition:.22s var(--ease);
}
.drawer nav a:hover,.drawer nav a.active{background:rgba(31,217,196,.08);border-color:rgba(31,217,196,.3);color:var(--cyan)}
.drawer .drawer-cta{max-width:520px;margin:24px auto 0}
.drawer .drawer-cta .btn{width:100%;padding:16px}
.drawer-note{max-width:520px;margin:18px auto 0;color:var(--text-3);font-size:13px;text-align:center}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:80px 0 92px;background:var(--ink-900)}
.hero .grid-tex{opacity:.65}
.hero .glow-spot{width:640px;height:640px;top:-220px;left:-160px}
.hero .glow-spot.v2{width:520px;height:520px;top:120px;right:-200px;left:auto}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;min-height:66vh}
.hero h1{font-size:52px;line-height:1.14;margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--cyan);text-shadow:0 0 26px rgba(31,217,196,.45)}
.hero-sub{font-size:18px;color:var(--text-2);max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px}
.hero-visual{position:relative;min-height:420px}
.hv-photo{
  position:absolute;inset:0 12px 24px 0;border-radius:24px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.9);
}
.hv-photo img{width:100%;height:100%;object-fit:cover;filter:saturate(.9)}
.hv-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(150deg,rgba(5,10,18,.62),rgba(5,10,18,.86));
}
.hv-shot{
  position:absolute;right:0;top:56px;width:70%;padding:10px;border-radius:20px;
  animation:floaty 7s ease-in-out infinite;
}
.hv-shot img{border-radius:var(--r-img);aspect-ratio:16/10;object-fit:cover;width:100%}
.hv-card{
  position:absolute;left:-14px;bottom:6px;width:62%;padding:16px 18px;
  animation:floaty 8.5s ease-in-out infinite reverse;
}
.hv-card .hc-row{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-2)}
.hv-card .hc-row + .hc-row{margin-top:9px;padding-top:9px;border-top:1px dashed var(--line)}
.hv-card strong{color:var(--text);font-size:14px}
.hv-bar{height:6px;border-radius:6px;background:rgba(31,217,196,.16);overflow:hidden;margin-top:12px}
.hv-bar i{display:block;height:100%;width:72%;border-radius:6px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 12px rgba(31,217,196,.7)}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@media (max-width:1023px){
  .hero-inner{grid-template-columns:1fr;gap:38px;min-height:0}
  .hero h1{font-size:36px}
  .hero-visual{min-height:360px}
}
@media (max-width:768px){
  .hero{padding:52px 0 60px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:16px}
  .hero-visual{min-height:300px}
  .hv-shot{width:78%;top:34px}
  .hv-card{width:74%;left:0}
}

/* ---------- 下载区 ---------- */
.dl-section{background:linear-gradient(180deg,var(--ink-900),var(--ink-800) 40%,var(--ink-900))}
.tabs{display:flex;gap:10px;flex-wrap:nowrap;overflow-x:auto;padding-bottom:8px;margin-bottom:26px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;padding:10px 20px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line);background:rgba(20,38,60,.55);color:var(--text-2);
  font-size:14px;font-weight:700;transition:.22s var(--ease);
}
.tab:hover{color:var(--text);border-color:rgba(31,217,196,.4)}
.tab.active{
  color:#04191A;background:linear-gradient(120deg,var(--cyan),var(--cyan-lt));
  border-color:transparent;box-shadow:0 0 0 1px rgba(31,217,196,.55),0 10px 26px -10px rgba(31,217,196,.75);
}
.dl-panel{display:none}
.dl-panel.active{display:block;animation:fadeIn .26s var(--ease)}
.dl-card{padding:30px;display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center}
.dl-card h3{font-size:23px;margin-bottom:8px}
.dl-card .dl-desc{color:var(--text-2);font-size:15.5px;margin-bottom:20px}
.param-row{display:flex;align-items:baseline;gap:12px;padding:9px 0;font-size:14px}
.param-row + .param-row{border-top:1px dashed var(--line)}
.param-row .k{color:var(--text-3);white-space:nowrap}
.param-row .dots{flex:1;border-bottom:1px dashed rgba(120,180,220,.22);transform:translateY(-4px)}
.param-row .v{color:var(--text);font-weight:600;text-align:right;word-break:break-all}
.param-row .v.mono{font-family:var(--mono);font-size:12.5px;color:var(--cyan-lt)}
.dl-side{text-align:left}
.dl-side .btn{width:100%;padding:15px}
.dl-note{margin-top:14px;font-size:13px;color:var(--text-3);line-height:1.7}
@media (max-width:900px){.dl-card{grid-template-columns:1fr;gap:22px;padding:22px}}

/* ---------- Bento 功能区 ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento-item{
  grid-column:span 7;display:grid;grid-template-columns:5fr 7fr;gap:0;overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.bento-item.wide-r{grid-column:span 5;grid-template-columns:1fr}
.bento-item:nth-child(3){grid-column:span 5;grid-template-columns:1fr}
.bento-item:nth-child(4){grid-column:span 7;grid-template-columns:7fr 5fr}
.bento-item:hover{transform:translateY(-4px);border-color:rgba(31,217,196,.4)}
.bento-media{position:relative;overflow:hidden;min-height:220px}
.bento-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.bento-media::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(5,10,18,.24),rgba(5,10,18,.66))}
.bento-body{padding:28px}
.bento-body h3{font-size:21px;margin:14px 0 10px}
.bento-body p{color:var(--text-2);font-size:15.5px}
.arrow-link{display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:14.5px;font-weight:700}
.arrow-link svg{transition:transform .22s var(--ease)}
.arrow-link:hover svg{transform:translateX(5px)}
@media (max-width:1023px){
  .bento{grid-template-columns:1fr}
  .bento-item,.bento-item.wide-r,.bento-item:nth-child(3),.bento-item:nth-child(4){grid-column:span 1;grid-template-columns:1fr}
  .bento-media{min-height:180px}
  .bento-body{padding:22px}
}

/* ---------- 轮播 ---------- */
.shots{background:var(--ink-800);position:relative;overflow:hidden}
.carousel{position:relative;border-radius:22px;overflow:hidden}
.carousel-viewport{overflow:hidden;border-radius:22px}
.carousel-track{display:flex;transition:transform .55s var(--ease)}
.slide{flex:0 0 100%;position:relative}
.slide img{width:100%;aspect-ratio:16/10;object-fit:cover}
.slide-cap{
  position:absolute;left:0;right:0;bottom:0;padding:26px 28px;
  background:linear-gradient(0deg,rgba(5,10,18,.9),transparent);
}
.slide-cap strong{display:block;font-size:18px;margin-bottom:4px}
.slide-cap span{color:var(--text-2);font-size:14px}
.car-btn{
  position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;z-index:3;
  background:rgba(13,27,44,.75);border:1px solid rgba(31,217,196,.45);color:var(--cyan);
  backdrop-filter:blur(10px);box-shadow:0 0 22px -6px rgba(31,217,196,.7);
  transition:.22s var(--ease);
}
.car-btn:hover{background:rgba(31,217,196,.16);color:var(--cyan-lt)}
.car-prev{left:16px}
.car-next{right:16px}
.dots{display:flex;justify-content:center;gap:9px;margin-top:22px}
.dots button{width:9px;height:9px;border-radius:50%;border:0;padding:0;cursor:pointer;background:rgba(120,180,220,.3);transition:.22s var(--ease)}
.dots button.active{background:var(--cyan);width:26px;border-radius:6px;box-shadow:0 0 12px rgba(31,217,196,.8)}
@media (max-width:768px){
  .car-btn{display:none}
  .slide-cap{padding:16px}
}

/* ---------- 系统要求 ---------- */
.sys-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.sys-card{padding:26px 28px}
.sys-card h3{font-size:19px;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.sys-card .sys-tag{font-size:12px;color:var(--text-3);font-family:var(--mono)}
.sys-list{margin-top:16px}
@media (max-width:900px){.sys-grid{grid-template-columns:1fr}}
.acc-item{border:1px solid var(--line);border-radius:var(--r-card);background:rgba(13,27,44,.5);overflow:hidden}
.acc-item + .acc-item{margin-top:12px}
.acc-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-weight:700;font-size:16px;color:var(--text);transition:.22s var(--ease);
}
.acc-item summary::-webkit-details-marker{display:none}
.acc-item summary:hover{color:var(--cyan)}
.acc-item summary .icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;transition:transform .26s var(--ease);
}
.acc-item summary .icon::before,.acc-item summary .icon::after{
  content:"";position:absolute;background:var(--cyan);border-radius:2px;
}
.acc-item summary .icon::before{left:0;right:0;top:10px;height:2px}
.acc-item summary .icon::after{top:0;bottom:0;left:10px;width:2px}
.acc-item[open] summary .icon{transform:rotate(135deg)}
.acc-body{padding:0 22px 20px;color:var(--text-2);font-size:15.5px}
.mobile-only{display:none}
@media (max-width:768px){
  .desktop-only{display:none}
  .mobile-only{display:block}
}

/* ---------- 评价墙 ---------- */
.reviews{background:var(--ink-900)}
.review-cols{columns:3;column-gap:24px}
.review-card{
  break-inside:avoid;margin-bottom:24px;padding:22px;
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.review-card:hover{transform:translateY(-4px);border-color:rgba(31,217,196,.38)}
.rc-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rc-avatar{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font-weight:800;color:#04191A;background:linear-gradient(135deg,var(--cyan),var(--violet));
}
.rc-name{font-weight:700;font-size:15px}
.rc-meta{font-size:12.5px;color:var(--text-3)}
.rc-stars{color:var(--amber);font-size:14px;letter-spacing:2px;margin-bottom:8px}
.rc-text{color:var(--text-2);font-size:15px}
@media (max-width:1023px){.review-cols{columns:2}}
@media (max-width:640px){.review-cols{columns:1}}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;overflow:hidden;transition:transform .22s var(--ease),border-color .22s var(--ease)}
.news-card:hover{transform:translateY(-4px);border-color:rgba(31,217,196,.42)}
.news-thumb{position:relative;overflow:hidden}
.news-thumb img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-thumb .badge{position:absolute;left:14px;top:14px;backdrop-filter:blur(6px)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17.5px;line-height:1.5;margin-bottom:10px;color:var(--text)}
.news-card:hover h3{color:var(--cyan)}
.news-body p{color:var(--text-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;gap:8px;color:var(--text-3);font-size:13px}
.news-empty{
  grid-column:1/-1;padding:48px 24px;text-align:center;color:var(--text-2);
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.news-empty .icon{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:rgba(31,217,196,.1);border:1px solid rgba(31,217,196,.3);color:var(--cyan)}
@media (max-width:900px){.news-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.news-grid{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}

/* ---------- CTA ---------- */
.cta-section{padding:96px 0}
.cta-bar{
  position:relative;overflow:hidden;padding:52px 48px;border-radius:26px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-bar .glow-spot{width:420px;height:420px;top:-180px;right:-80px}
.cta-bar h2{font-size:30px;margin-bottom:12px;position:relative;z-index:2}
.cta-bar p{color:var(--text-2);position:relative;z-index:2;max-width:620px}
.cta-bar .cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}
@media (max-width:768px){.cta-bar{padding:32px 22px}.cta-bar h2{font-size:23px}}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-800);border-top:1px solid var(--line);
  position:relative;padding-top:1px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,217,196,.8),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{color:var(--text-3);font-size:14px;max-width:280px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--text-2);font-size:14px}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 26px;
  color:var(--text-3);font-size:13px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
}
.footer-bottom .mono{font-family:var(--mono)}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 30px}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr}}

/* ---------- 底部固定下载条 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  display:none;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  background:rgba(8,17,30,.92);backdrop-filter:blur(14px);
  border-top:1px solid rgba(31,217,196,.3);
  box-shadow:0 -18px 40px -24px rgba(0,0,0,.9);
  transform:translateY(120%);transition:transform .32s var(--ease);
}
.mobile-bar.show{transform:translateY(0)}
.mobile-bar .mb-chips{display:flex;gap:6px}
.mobile-bar .mb-chip{font-size:12px;padding:5px 10px;border-radius:999px;background:rgba(20,38,60,.85);border:1px solid var(--line);color:var(--text-2)}
.mobile-bar .mb-chip.on{color:var(--cyan);border-color:rgba(31,217,196,.5)}
@media (max-width:767px){
  .mobile-bar{display:flex}
  body{padding-bottom:78px}
}

/* 返回顶部 */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none;
  background:rgba(13,27,44,.85);border:1px solid rgba(31,217,196,.45);color:var(--cyan);
  backdrop-filter:blur(10px);transition:.28s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:rgba(31,217,196,.16)}
@media (max-width:767px){.to-top{bottom:92px}}

/* roulang page: category1 */
*,*::before,*::after{box-sizing:border-box}
:root{
  --ink-900:#050A12;
  --ink-800:#08111E;
  --ink-700:#0D1B2C;
  --ink-600:#14263C;
  --cyan:#1FD9C4;
  --cyan-lite:#5BF0DD;
  --purple:#7A5CFF;
  --orange:#FFB35C;
  --text:#E8F3F7;
  --text-2:#A9BECD;
  --text-3:#6E8698;
  --line:rgba(120,180,220,.14);
  --glass:rgba(13,27,44,.55);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.8);
  --shadow-btn:0 0 0 1px rgba(31,217,196,.6),0 10px 30px -8px rgba(31,217,196,.55);
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  padding-bottom:0;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 420px at 12% -6%,rgba(31,217,196,.14),transparent 68%),
    radial-gradient(560px 380px at 92% 6%,rgba(122,92,255,.14),transparent 70%),
    linear-gradient(rgba(120,180,220,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,220,.035) 1px,transparent 1px);
  background-size:auto,auto,56px 56px,56px 56px;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--text)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:2}
.muted{color:var(--text-2)}
.dim{color:var(--text-3)}
.section{padding:96px 0;position:relative;z-index:2}
.section--tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:34px}
.section-head h2{font-size:32px;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--cyan);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--cyan);box-shadow:0 0 10px rgba(31,217,196,.8)}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,18,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.site-header.scrolled{
  border-bottom-color:rgba(31,217,196,.45);
  box-shadow:0 12px 34px -22px rgba(31,217,196,.85);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.logo-mark{
  width:32px;height:32px;border-radius:10px;
  display:grid;place-items:center;
  font-size:15px;font-weight:900;color:#04121A;
  background:linear-gradient(135deg,var(--cyan-lite),var(--cyan) 60%,var(--purple));
  box-shadow:0 0 0 1px rgba(31,217,196,.5),0 8px 20px -10px rgba(31,217,196,.9);
}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;font-size:15px;color:var(--text-2);
  padding:8px 14px;border-radius:10px;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(31,217,196,.07)}
.nav-links a.active{color:var(--cyan)}
.nav-links a.active::before{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(31,217,196,.9);
}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-6px;
  width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 12px rgba(31,217,196,.95);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{
  display:none;width:42px;height:42px;border-radius:12px;
  background:rgba(13,27,44,.7);border:1px solid var(--line);cursor:pointer;
  padding:0;place-items:center;
}
.burger span{display:block;width:18px;height:2px;margin:3px auto;border-radius:2px;background:var(--text)}
.burger:hover{border-color:rgba(31,217,196,.5)}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;
  background:rgba(5,10,18,.94);
  backdrop-filter:blur(18px);
  transform:translateY(-100%);
  transition:transform .38s var(--ease);
  display:flex;flex-direction:column;
  padding:22px 20px 32px;
}
.drawer.open{transform:translateY(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-close{width:40px;height:40px;border-radius:12px;background:rgba(13,27,44,.8);border:1px solid var(--line);color:var(--text);font-size:18px;cursor:pointer}
.drawer__links{display:flex;flex-direction:column;gap:8px;margin-bottom:auto}
.drawer__links a{
  font-size:22px;font-weight:700;padding:16px 14px;border-radius:14px;
  border:1px solid transparent;color:var(--text-2);
}
.drawer__links a.active{color:var(--cyan);border-color:rgba(31,217,196,.35);background:rgba(31,217,196,.06)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1;
  padding:14px 24px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
  white-space:nowrap;
}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.btn-primary{
  color:#03141A;
  background:linear-gradient(120deg,var(--cyan-lite),var(--cyan) 55%,var(--purple));
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 0 0 1px rgba(31,217,196,.7),0 16px 38px -10px rgba(31,217,196,.75)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  color:var(--cyan);background:transparent;border-color:rgba(31,217,196,.55);
}
.btn-ghost:hover{background:rgba(31,217,196,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* 徽章与 chip */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
  padding:5px 11px;border-radius:999px;
  color:var(--text-2);background:rgba(20,38,60,.85);border:1px solid var(--line);
}
.badge-cyan{color:#04191A;background:linear-gradient(120deg,var(--cyan-lite),var(--cyan));border-color:transparent}
.badge-purple{color:#0A0620;background:linear-gradient(120deg,#A99BFF,var(--purple));border-color:transparent}
.badge-warm{color:#2A1702;background:linear-gradient(120deg,#FFD39B,var(--orange));border-color:transparent}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;padding:9px 16px;border-radius:999px;
  color:var(--text-2);background:rgba(13,27,44,.7);
  border:1px solid var(--line);cursor:pointer;
  transition:all .22s var(--ease);
}
.chip:hover{color:var(--text);border-color:rgba(31,217,196,.45);transform:translateY(-2px)}
.chip.active{
  color:#04191A;font-weight:700;border-color:transparent;
  background:linear-gradient(120deg,var(--cyan-lite),var(--cyan));
  box-shadow:0 0 0 1px rgba(31,217,196,.5),0 8px 22px -10px rgba(31,217,196,.8);
}

/* 玻璃卡 */
.glass{
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
}

/* Hero */
.page-hero{
  position:relative;
  min-height:42vh;
  display:flex;align-items:center;
  padding:64px 0 60px;
  overflow:hidden;
}
.page-hero__bg{
  position:absolute;inset:0;
  background-image:
    linear-gradient(180deg,rgba(5,10,18,.62),rgba(5,10,18,.9)),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.page-hero__bg::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 320px at 18% 20%,rgba(31,217,196,.18),transparent 70%),
             radial-gradient(520px 300px at 88% 80%,rgba(122,92,255,.2),transparent 72%);
}
.page-hero__inner{position:relative;z-index:2;width:100%}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .current{color:var(--text-2)}
.page-hero__grid{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.page-hero h1{font-size:44px;margin:14px 0 16px;font-weight:900}
.page-hero .lead{color:var(--text-2);font-size:17px;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-note{padding:24px;border-radius:var(--r-card)}
.hero-note h2{font-size:17px;margin-bottom:14px;color:var(--cyan)}
.hero-note li{
  position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);
  margin-bottom:10px;
}
.hero-note li:last-child{margin-bottom:0}
.hero-note li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px rgba(31,217,196,.9);
}

/* 平台下载 */
.platform-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.dl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.dl-card{padding:26px;border-radius:var(--r-card);display:flex;flex-direction:column;transition:transform .22s var(--ease),border-color .22s var(--ease)}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(31,217,196,.38)}
.dl-card__head{display:flex;align-items:flex-start;gap:14px;margin-bottom:20px}
.os-icon{
  flex:0 0 46px;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;font-size:15px;font-weight:900;
  color:#04191A;background:linear-gradient(140deg,var(--cyan-lite),var(--cyan));
  box-shadow:0 0 0 1px rgba(31,217,196,.4);
}
.os-icon.alt{background:linear-gradient(140deg,#B4A9FF,var(--purple));color:#0A0620;box-shadow:0 0 0 1px rgba(122,92,255,.45)}
.dl-card__head h3{font-size:20px;margin-bottom:4px}
.dl-card__head p{font-size:13.5px;color:var(--text-3)}
.param-list{margin-bottom:20px}
.param-row{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-2);padding:7px 0;
}
.param-row span{white-space:nowrap}
.param-row i{
  flex:1;height:1px;border-bottom:1px dashed rgba(120,180,220,.28);
}
.param-row b{color:var(--text);font-weight:600;font-size:13.5px}
.dl-card .hint{font-size:12.5px;color:var(--text-3);margin-top:12px;line-height:1.7}
.dl-card--wide{grid-column:span 2;flex-direction:row;align-items:center;gap:28px;flex-wrap:wrap}
.dl-card--wide .dl-card__body{flex:1;min-width:260px}
.dl-card--wide .dl-card__body h3{font-size:20px;margin-bottom:8px}
.dl-card--wide .dl-card__body p{font-size:14.5px;color:var(--text-2)}

/* 功能交错图文 */
.feature-row{
  display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;
  padding:34px 0;border-bottom:1px solid var(--line);
}
.feature-row:last-child{border-bottom:0}
.feature-row.reverse{grid-template-columns:5fr 7fr}
.feature-row.reverse .feature-media{order:2}
.feature-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  aspect-ratio:16/10;border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.feature-media img{width:100%;height:100%;object-fit:cover}
.feature-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.08),rgba(5,10,18,.5));
}
.feature-text h2{font-size:26px;margin-bottom:14px}
.feature-text p{color:var(--text-2);font-size:16px;margin-bottom:16px}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--cyan);font-size:14.5px;font-weight:700;
  transition:gap .22s var(--ease),color .22s var(--ease);
}
.link-arrow:hover{gap:14px;color:var(--cyan-lite)}

/* 系统要求 */
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.req-card{padding:26px;border-radius:var(--r-card)}
.req-card h3{font-size:18px;margin-bottom:6px}
.req-card > p{font-size:13.5px;color:var(--text-3);margin-bottom:16px}
.req-card .param-row span{color:var(--text-3)}

/* FAQ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:rgba(13,27,44,.5);margin-bottom:14px;overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item[open]{border-color:rgba(31,217,196,.4)}
.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);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-size:20px;line-height:1;color:var(--cyan);
  transition:transform .22s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 22px 20px;color:var(--text-2);font-size:15px}

/* CTA 条 */
.cta-band{
  position:relative;overflow:hidden;
  padding:46px 0;margin:0 0 12px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(560px 240px at 18% 50%,rgba(31,217,196,.2),transparent 70%),
             radial-gradient(480px 220px at 82% 50%,rgba(122,92,255,.22),transparent 72%);
}
.cta-inner{
  position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  padding:34px 34px;border-radius:22px;
}
.cta-inner h2{font-size:26px;margin-bottom:10px}
.cta-inner p{color:var(--text-2);font-size:15px}

/* 页脚 */
.site-footer{
  position:relative;z-index:2;
  border-top:1px solid rgba(31,217,196,.32);
  box-shadow:0 -14px 34px -28px rgba(31,217,196,.9);
  background:var(--ink-800);
  padding:64px 0 0;
  margin-top:40px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-brand p{color:var(--text-3);font-size:14px;margin-top:16px;max-width:280px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .22s var(--ease)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* 底部固定下载条 */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:none;align-items:center;gap:12px;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  background:rgba(8,17,30,.94);
  backdrop-filter:blur(14px);
  border-top:1px solid rgba(31,217,196,.32);
  transform:translateY(110%);
  transition:transform .34s var(--ease);
}
.mobile-bar.show{transform:translateY(0)}
.mobile-bar .chips{display:flex;gap:8px;overflow-x:auto;flex:1}
.mobile-bar .chip{padding:8px 13px;font-size:13px}

@media (max-width:1024px){
  .nav-links{display:none}
  .burger{display:grid}
  .page-hero h1{font-size:34px}
  .page-hero__grid{grid-template-columns:1fr;gap:28px}
  .feature-row,.feature-row.reverse{grid-template-columns:1fr;gap:24px}
  .feature-row.reverse .feature-media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:60px 0}
  .section--tight{padding:52px 0}
  .section-head h2{font-size:24px}
  .page-hero{min-height:auto;padding:44px 0 40px}
  .page-hero h1{font-size:29px}
  .dl-grid{grid-template-columns:1fr;gap:18px}
  .dl-card--wide{grid-column:span 1;flex-direction:column;align-items:flex-start}
  .req-grid{grid-template-columns:1fr}
  .feature-text h2{font-size:22px}
  .cta-inner{padding:26px 20px}
  .cta-inner h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .mobile-bar{display:flex}
  body{padding-bottom:74px}
}
@media (max-width:520px){
  .nav-cta .btn-primary{display:none}
  .hero-actions .btn{width:100%}
  .platform-tabs .chip{flex:1 1 auto;justify-content:center}
  .dl-card{padding:20px}
}

/* roulang page: article */
:root{
  --ink-900:#050A12;
  --ink-800:#08111E;
  --ink-700:#0D1B2C;
  --ink-600:#14263C;
  --cyan:#1FD9C4;
  --cyan-bright:#5BF0DD;
  --violet:#7A5CFF;
  --orange:#FFB35C;
  --text:#E8F3F7;
  --text-2:#A9BECD;
  --text-3:#6E8698;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(120,180,220,.26);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --glass-bg:rgba(13,27,44,.55);
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.06);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(760px 460px at 12% -6%, rgba(31,217,196,.12), transparent 68%),
    radial-gradient(680px 460px at 92% 4%, rgba(122,92,255,.13), transparent 70%);
  z-index:0;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.25;color:var(--text)}
p{margin:0}
.mono{font-family:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace}
:focus-visible{outline:2px solid var(--cyan);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:88px 0}
.section-tight{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px}
.section-head h2{font-size:32px}
.section-head p{color:var(--text-3);font-size:15px;margin-top:8px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--cyan);font-weight:600;
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--cyan),transparent);border-radius:2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:15px;
  padding:13px 24px;transition:all .22s var(--ease);white-space:nowrap;
  border:1px solid transparent;
}
.btn-sm{padding:9px 17px;font-size:14px}
.btn-primary{
  color:#04231F;
  background:linear-gradient(135deg,var(--cyan-bright),var(--cyan) 58%,#8b78ff);
  box-shadow:0 0 0 1px rgba(31,217,196,.6),0 10px 30px -8px rgba(31,217,196,.55);
}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(91,240,221,.85),0 16px 40px -10px rgba(31,217,196,.7)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{color:var(--cyan);border-color:rgba(31,217,196,.45);background:transparent}
.btn-ghost:hover{background:rgba(31,217,196,.08);transform:translateY(-2px);border-color:rgba(31,217,196,.75)}
.btn-ghost:active{transform:translateY(1px)}

/* ---------- 标签 / 徽章 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:13px;
  border:1px solid var(--line-strong);color:var(--text-2);
  background:rgba(20,38,60,.5);transition:all .22s var(--ease);
}
.chip:hover{color:var(--cyan);border-color:rgba(31,217,196,.5);transform:translateY(-2px)}
.chip-cyan{color:#04231F;background:linear-gradient(135deg,var(--cyan-bright),var(--cyan));border-color:transparent;font-weight:600}
.chip-sm{padding:4px 11px;font-size:12px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--orange);background:rgba(255,179,92,.1);border:1px solid rgba(255,179,92,.3);
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);display:inline-block}

/* ---------- 顶部信息条 ---------- */
.topbar{
  position:relative;z-index:60;
  background:rgba(8,17,30,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.topbar-inner{
  height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:12.5px;color:var(--text-3);
}
.topbar-domain{color:var(--text-2);letter-spacing:.04em}
.topbar-domain:hover{color:var(--cyan)}
.topbar-tip{color:var(--text-3)}
.topbar-actions{display:flex;align-items:center;gap:18px}
.topbar-actions a{color:var(--text-2);transition:color .2s var(--ease)}
.topbar-actions a:hover{color:var(--cyan)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(5,10,18,.72);
  border-bottom:1px solid transparent;
  transition:background .28s var(--ease),border-color .28s var(--ease),backdrop-filter .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,10,18,.86);
  backdrop-filter:blur(14px);
  border-bottom-color:rgba(31,217,196,.34);
  box-shadow:0 14px 34px -22px rgba(31,217,196,.6);
}
.nav-wrap{height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.01em}
.logo-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  font-size:15px;font-weight:800;color:#04231F;
  background:linear-gradient(135deg,var(--cyan-bright),var(--cyan) 60%,#8f7bff);
  box-shadow:0 0 0 1px rgba(31,217,196,.5),0 8px 22px -10px rgba(31,217,196,.85);
}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;padding:10px 15px;border-radius:10px;
  font-size:15px;color:var(--text-2);transition:all .22s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(31,217,196,.07)}
.nav-links a.active{color:var(--cyan)}
.nav-links a.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(31,217,196,.2));
}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;bottom:-4px;transform:translateX(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line-strong);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:all .25s var(--ease)}
.burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--cyan)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--cyan)}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;
  background:rgba(5,10,18,.9);
  backdrop-filter:blur(18px);
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
  display:flex;flex-direction:column;
  padding:96px 24px 120px;
}
.drawer.open{opacity:1;visibility:visible}
.drawer nav{display:flex;flex-direction:column;gap:6px}
.drawer nav a{
  font-size:24px;font-weight:700;color:var(--text-2);
  padding:16px 4px;border-bottom:1px solid var(--line);
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.drawer nav a:hover,.drawer nav a.active{color:var(--cyan);padding-left:12px}
.drawer-actions{margin-top:auto;display:flex;flex-direction:column;gap:14px}

/* ---------- 阅读进度 ---------- */
.read-bar{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:100;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-bright),#8b78ff);
  box-shadow:0 0 12px rgba(31,217,196,.8);
  transition:width .1s linear;
}

/* ---------- 文章头区 ---------- */
.article-hero{
  position:relative;
  padding:52px 0 46px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(5,10,18,.68),rgba(5,10,18,.94)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.5;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,180,220,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,220,.05) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 30% 40%,#000,transparent 76%);
  mask-image:radial-gradient(circle at 30% 40%,#000,transparent 76%);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-2);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:rgba(120,180,220,.35)}
.breadcrumb .crumb-cur{color:var(--text-3);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.crumb-cat{color:var(--cyan)}

.article-head{max-width:820px}
.head-cat{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:600;color:var(--cyan);letter-spacing:.06em;
  margin-bottom:16px;
}
.head-cat::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.article-head h1{
  font-size:44px;line-height:1.22;font-weight:900;
  letter-spacing:-.025em;margin-bottom:22px;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px 22px;
  font-size:13.5px;color:var(--text-3);
  padding-top:20px;border-top:1px solid var(--line);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta .meta-item svg{opacity:.75}
.meta-divider{width:1px;height:14px;background:var(--line-strong)}
.share-row{display:flex;align-items:center;gap:9px;margin-left:auto}
.share-row button{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--text-3);
  transition:all .22s var(--ease);
}
.share-row button:hover{color:var(--cyan);border-color:rgba(31,217,196,.5);transform:translateY(-2px)}

/* ---------- 正文布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);
  gap:52px;align-items:start;padding:56px 0 88px;
}
.article-main{min-width:0;max-width:760px}

.article-body{font-size:17px;line-height:1.85;color:var(--text-2);word-break:break-word}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.35em}
.article-body h2{
  font-size:29px;color:var(--text);margin:44px 0 18px;
  padding-left:15px;border-left:3px solid var(--cyan);line-height:1.35;
}
.article-body h3{font-size:21px;color:var(--text);margin:34px 0 14px}
.article-body h4{font-size:18px;color:var(--text);margin:26px 0 12px}
.article-body strong{color:var(--text);font-weight:700}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(31,217,196,.4);transition:border-color .2s var(--ease)}
.article-body a:hover{border-bottom-color:var(--cyan)}
.article-body ul,.article-body ol{margin:0 0 1.35em;padding-left:24px}
.article-body ul{list-style:none;padding-left:22px}
.article-body ul li{position:relative;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:-18px;top:.72em;
  width:7px;height:7px;border-radius:50%;
  background:radial-gradient(circle,var(--cyan),rgba(31,217,196,.35));
  box-shadow:0 0 8px rgba(31,217,196,.7);
}
.article-body ol{list-style:decimal}
.article-body ol li{margin-bottom:10px}
.article-body ol li::marker{color:var(--cyan);font-weight:700}
.article-body blockquote{
  margin:26px 0;padding:20px 24px;
  background:var(--glass-bg);border:1px solid var(--line);
  border-left:3px solid var(--cyan);border-radius:var(--r-img);
  color:var(--text-2);font-style:normal;
  box-shadow:var(--shadow-card);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  border-radius:var(--r-img);margin:26px auto;
  border:1px solid var(--line);
}
.article-body figure{margin:26px 0}
.article-body figcaption{
  text-align:center;font-size:13px;color:var(--text-3);margin-top:10px;
}
.article-body pre{
  position:relative;margin:24px 0;padding:40px 20px 20px;
  background:var(--ink-800);border:1px solid var(--line);
  border-radius:var(--r-img);overflow-x:auto;
  font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
  font-size:13.5px;line-height:1.75;color:#BFE9E2;
}
.article-body pre::before{
  content:"";position:absolute;top:16px;left:20px;
  width:9px;height:9px;border-radius:50%;background:#ff5f57;
  box-shadow:16px 0 0 #febc2e,32px 0 0 #28c840;
}
.article-body code{
  font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
  font-size:.9em;padding:2px 7px;border-radius:6px;
  background:rgba(31,217,196,.1);color:var(--cyan-bright);
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body .table-scroll{overflow-x:auto;margin:26px 0;border:1px solid var(--line);border-radius:var(--r-img)}
.article-body table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
.article-body table th{
  background:rgba(31,217,196,.08);color:var(--text);font-weight:700;
  text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);
}
.article-body table td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--text-2)}
.article-body table tbody tr:nth-child(even){background:rgba(20,38,60,.35)}
.article-body table tbody tr:last-child td{border-bottom:0}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}

/* ---------- 空态 ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:16px;
  padding:64px 28px;text-align:center;
  background:var(--glass-bg);border:1px dashed var(--line-strong);
  border-radius:var(--r-card);box-shadow:var(--shadow-card);
}
.empty-icon{
  width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
  background:rgba(31,217,196,.1);border:1px solid rgba(31,217,196,.3);color:var(--cyan);
}
.empty-state p{color:var(--text-2);font-size:16px}

/* ---------- 标签行 / 翻页 ---------- */
.tag-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:9px;
  margin-top:48px;padding-top:26px;border-top:1px solid var(--line);
}
.tag-label{font-size:13px;color:var(--text-3);margin-right:4px}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:36px}
.pager-card{
  display:flex;flex-direction:column;gap:7px;
  padding:20px 22px;border-radius:var(--r-card);
  background:var(--glass-bg);border:1px solid var(--line);
  box-shadow:var(--shadow-card);transition:all .22s var(--ease);
}
.pager-card:hover{transform:translateY(-4px);border-color:rgba(31,217,196,.4)}
.pager-next{text-align:right;align-items:flex-end}
.pager-label{font-size:12.5px;color:var(--cyan);letter-spacing:.05em}
.pager-title{font-size:15.5px;font-weight:700;color:var(--text);line-height:1.55}

/* ---------- 相关推荐 ---------- */
.related{margin-top:44px}
.related h3{font-size:19px;margin-bottom:16px}
.related-list{display:flex;flex-direction:column;gap:12px}
.related-item{
  display:grid;grid-template-columns:96px minmax(0,1fr);gap:16px;
  padding:12px;border-radius:var(--r-img);
  background:rgba(13,27,44,.45);border:1px solid var(--line);
  transition:all .22s var(--ease);
}
.related-item:hover{transform:translateY(-3px);border-color:rgba(31,217,196,.4);background:rgba(13,27,44,.7)}
.related-thumb{width:96px;aspect-ratio:16/11;border-radius:10px;overflow:hidden;background:linear-gradient(135deg,rgba(31,217,196,.24),rgba(122,92,255,.28))}
.related-thumb img{width:100%;height:100%;object-fit:cover}
.related-body{min-width:0;display:flex;flex-direction:column;justify-content:center;gap:7px}
.related-body strong{font-size:15px;color:var(--text);font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-body span{font-size:12.5px;color:var(--text-3)}

.back-channel{display:inline-flex;align-items:center;gap:8px;margin-top:30px;font-size:14.5px;color:var(--cyan);transition:gap .22s var(--ease)}
.back-channel:hover{gap:13px}

/* ---------- 侧栏 ---------- */
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  padding:22px;border-radius:var(--r-card);
  background:var(--glass-bg);border:1px solid var(--line);
  backdrop-filter:blur(14px);box-shadow:var(--shadow-card);
}
.side-card h4{font-size:15.5px;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.side-card h4::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--cyan);box-shadow:0 0 8px rgba(31,217,196,.7)}
.side-links{display:flex;flex-direction:column;gap:2px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14.5px;color:var(--text-2);
  transition:all .22s var(--ease);
}
.side-links a:hover{background:rgba(31,217,196,.08);color:var(--cyan);transform:translateX(3px)}
.side-links a em{font-style:normal;font-size:12px;color:var(--text-3)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.dl-card{
  padding:24px 22px;border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(31,217,196,.14),rgba(122,92,255,.14)),var(--ink-700);
  border:1px solid rgba(31,217,196,.3);
  box-shadow:var(--shadow-card),0 0 40px -18px rgba(31,217,196,.6);
}
.dl-card h4{font-size:16px;margin-bottom:8px;display:block}
.dl-card h4::before{display:none}
.dl-card p{font-size:13.5px;color:var(--text-2);line-height:1.7;margin-bottom:16px}
.dl-card .btn{width:100%}
.dl-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-3);margin-top:12px}

/* ---------- 底部 CTA ---------- */
.cta-band{padding:0 0 96px}
.cta-box{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:36px;align-items:center;
  padding:48px;border-radius:24px;
  background:linear-gradient(135deg,rgba(13,27,44,.9),rgba(8,17,30,.95));
  border:1px solid rgba(31,217,196,.26);
  box-shadow:var(--shadow-card),0 0 90px -40px rgba(31,217,196,.75);
}
.cta-box::before{
  content:"";position:absolute;width:420px;height:420px;right:-120px;top:-180px;
  border-radius:50%;background:radial-gradient(circle,rgba(31,217,196,.28),transparent 68%);
  filter:blur(30px);
}
.cta-box::after{
  content:"";position:absolute;width:340px;height:340px;left:-100px;bottom:-190px;
  border-radius:50%;background:radial-gradient(circle,rgba(122,92,255,.3),transparent 68%);
  filter:blur(30px);
}
.cta-box>*{position:relative;z-index:2}
.cta-box h2{font-size:30px;margin-bottom:12px}
.cta-box p{color:var(--text-2);font-size:15.5px;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-note{grid-column:1/-1;font-size:13px;color:var(--text-3);padding-top:18px;border-top:1px solid var(--line)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  background:linear-gradient(180deg,rgba(8,17,30,.6),rgba(5,10,18,1));
  border-top:1px solid rgba(31,217,196,.24);
  box-shadow:0 -1px 0 rgba(31,217,196,.18),0 -20px 60px -40px rgba(31,217,196,.6);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:44px;
}
.footer-brand p{color:var(--text-3);font-size:14px;margin-top:16px;max-width:280px;line-height:1.75}
.footer-col h4{font-size:14.5px;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-3);transition:all .22s var(--ease)}
.footer-col a:hover{color:var(--cyan);padding-left:4px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}
.footer-bottom .mono{color:var(--text-2);letter-spacing:.04em}

/* ---------- 浮层组件 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:80;
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:rgba(13,27,44,.85);border:1px solid rgba(31,217,196,.4);color:var(--cyan);
  backdrop-filter:blur(12px);
  box-shadow:0 0 0 1px rgba(31,217,196,.2),0 14px 34px -16px rgba(31,217,196,.8);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .28s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:rgba(31,217,196,.14);transform:translateY(-3px)}

.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:85;
  display:none;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(8,17,30,.94);border-top:1px solid rgba(31,217,196,.28);
  backdrop-filter:blur(14px);
  transform:translateY(110%);transition:transform .3s var(--ease);
}
.mobile-bar.show{transform:translateY(0)}
.mb-chips{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none}
.mb-chips::-webkit-scrollbar{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .article-head h1{font-size:40px}
}
@media (max-width:1024px){
  .nav-links{display:none}
  .burger{display:flex}
  .nav-cta .btn{display:none}
  .article-layout{grid-template-columns:1fr;gap:40px;padding:44px 0 72px}
  .article-main{max-width:none}
  .side-sticky{position:static}
  .cta-box{grid-template-columns:1fr;padding:40px 32px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:768px){
  body{font-size:16px}
  .container{padding:0 16px}
  .topbar-tip{display:none}
  .topbar-inner{height:34px}
  .article-hero{padding:36px 0 32px}
  .article-head h1{font-size:28px;line-height:1.32}
  .article-meta{gap:10px 16px}
  .share-row{margin-left:0;width:100%}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .section-head h2{font-size:24px}
  .article-body{font-size:16px}
  .article-body h2{font-size:22px;margin:34px 0 14px}
  .article-body h3{font-size:18px}
  .pager{grid-template-columns:1fr}
  .pager-next{text-align:left;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .cta-box{padding:32px 22px;border-radius:20px}
  .cta-box h2{font-size:23px}
  .mobile-bar{display:flex}
  body{padding-bottom:70px}
  .to-top{right:16px;bottom:84px;width:42px;height:42px}
  .article-layout{padding:36px 0 60px}
}
@media (max-width:520px){
  .article-head h1{font-size:24px}
  .related-item{grid-template-columns:76px minmax(0,1fr);gap:12px}
  .related-thumb{width:76px}
  .breadcrumb{font-size:12.5px}
  .crumb-cur{max-width:180px}
}

/* roulang page: category2 */
:root{
  --cyan:#1FD9C4;
  --cyan-bright:#5BF0DD;
  --violet:#7A5CFF;
  --amber:#FFB35C;
  --ink-900:#050A12;
  --ink-800:#08111E;
  --ink-700:#0D1B2C;
  --ink-600:#14263C;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(31,217,196,.45);
  --text:#E8F3F7;
  --text-2:#A9BECD;
  --text-3:#6E8698;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-img:14px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.8);
  --shadow-glow:0 0 0 1px rgba(31,217,196,.6), 0 10px 30px -8px rgba(31,217,196,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease);}
a:hover{color:var(--cyan-bright);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.22;}
p{margin:0;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px;}
.mono{font-family:var(--font-mono);letter-spacing:.02em;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:rgba(8,17,30,.92);
  border-bottom:1px solid var(--line);
  font-size:12.5px;
  color:var(--text-2);
}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:36px;
}
.topbar-domain{color:var(--text-2);font-size:12.5px;}
.topbar-domain:hover{color:var(--cyan);}
.topbar-tip{
  flex:1;text-align:center;color:var(--text-3);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar-actions{display:flex;gap:18px;}
.topbar-actions a{color:var(--text-2);}
.topbar-actions a:hover{color:var(--cyan-bright);}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,18,.74);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.scrolled{
  background:rgba(5,10,18,.9);
  border-bottom-color:var(--line-strong);
  box-shadow:0 8px 28px -18px rgba(31,217,196,.65);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:68px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--text);
  white-space:nowrap;
}
.logo:hover{color:var(--text);}
.logo-mark{
  width:32px;height:32px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--cyan),var(--violet));
  color:#03121A;font-size:15px;font-weight:900;
  box-shadow:0 0 0 1px rgba(31,217,196,.5), 0 8px 20px -10px rgba(31,217,196,.8);
}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;
  padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(31,217,196,.08);}
.nav-links a.active{color:var(--cyan-bright);}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  border-radius:2px;
  box-shadow:0 0 10px rgba(31,217,196,.9);
}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;bottom:-4px;width:6px;height:6px;margin-left:-3px;
  border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px 2px rgba(31,217,196,.75);
}
.nav-cta{display:flex;align-items:center;gap:14px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);
  font-weight:700;font-size:15px;line-height:1;
  padding:14px 24px;
  cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-sm{padding:11px 18px;font-size:14px;}
.btn-lg{padding:17px 32px;font-size:16.5px;}
.btn-block{width:100%;}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),#39c9f0 55%,var(--violet));
  color:#02141B;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  color:#02141B;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(31,217,196,.85), 0 16px 40px -10px rgba(31,217,196,.85);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;color:var(--cyan-bright);
  border:1px solid rgba(31,217,196,.5);
}
.btn-ghost:hover{
  color:#02141B;background:rgba(31,217,196,.85);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px);}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:120;
  display:none;
  flex-direction:column;
  padding:22px 20px 32px;
  background:rgba(5,10,18,.94);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.drawer.open{display:flex;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);color:var(--text-2);
  font-size:22px;line-height:1;
  display:flex;align-items:center;justify-content:center;
}
.drawer-close:hover{color:var(--cyan-bright);border-color:var(--line-strong);}
.drawer-links{display:flex;flex-direction:column;gap:6px;margin:34px 0 auto;}
.drawer-links a{
  font-size:24px;font-weight:800;letter-spacing:-.02em;
  padding:14px 4px;border-bottom:1px solid var(--line);color:var(--text-2);
}
.drawer-links a.active{color:var(--cyan-bright);}
.drawer-foot{display:flex;flex-direction:column;gap:12px;}
.burger{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:background .2s var(--ease);}
.burger:hover span{background:var(--cyan);}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative;}
.section-alt{background:var(--ink-800);}
.section-head{max-width:760px;margin-bottom:36px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:.14em;color:var(--cyan);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{
  content:"";width:24px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  box-shadow:0 0 10px rgba(31,217,196,.8);
}
.section-head h2{font-size:34px;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16.5px;}
.lead{color:var(--text-2);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  padding:76px 0 68px;
  min-height:420px;
  background:var(--ink-900);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.4;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(680px 360px at 12% 8%, rgba(31,217,196,.20), transparent 62%),
    radial-gradient(620px 360px at 88% 88%, rgba(122,92,255,.20), transparent 65%),
    linear-gradient(180deg, rgba(5,10,18,.72), rgba(5,10,18,.94));
}
.hero .container{position:relative;z-index:2;}
.hero-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);margin-bottom:20px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--cyan-bright);}
.breadcrumb span.sep{color:var(--text-3);opacity:.7;}
.breadcrumb .current{color:var(--cyan);}
.tag-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--cyan-bright);
  padding:6px 13px;border-radius:999px;
  border:1px solid rgba(31,217,196,.34);
  background:rgba(31,217,196,.08);
  margin-bottom:20px;
}
.tag-label::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px 2px rgba(31,217,196,.8);
}
.hero h1{
  font-size:46px;line-height:1.18;margin-bottom:18px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--cyan-bright),var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  font-size:17.5px;color:var(--text-2);max-width:640px;margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 16px;border-radius:999px;
  font-size:13.5px;color:var(--text-2);
  border:1px solid var(--line);
  background:rgba(13,27,44,.55);
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
}
.chip:hover{color:var(--cyan-bright);border-color:var(--line-strong);transform:translateY(-2px);}
.chip.is-active{
  color:#02141B;
  background:linear-gradient(135deg,var(--cyan),#48d8ea);
  border-color:transparent;
  font-weight:700;
  box-shadow:0 8px 24px -10px rgba(31,217,196,.85);
}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:32px;margin-top:32px;
  padding-top:26px;border-top:1px solid var(--line);
}
.hero-stats div strong{
  display:block;font-family:var(--font-mono);font-size:22px;color:var(--cyan-bright);
  letter-spacing:-.01em;
}
.hero-stats div span{font-size:13.5px;color:var(--text-3);}
.glass-card{
  background:rgba(13,27,44,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
  padding:26px;
}
.hero-side h3{font-size:18px;margin-bottom:6px;}
.hero-side .side-note{font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.side-list{display:flex;flex-direction:column;gap:10px;margin-bottom:20px;}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:13px 15px;border-radius:var(--radius-btn);
  background:rgba(8,17,30,.7);
  border:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);
  transition:transform .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.side-list a:hover{transform:translateX(4px);border-color:var(--line-strong);color:var(--text);}
.side-list a i{
  font-style:normal;color:var(--cyan);font-family:var(--font-mono);font-size:13px;
}
.side-foot{font-size:13px;color:var(--text-3);border-top:1px solid var(--line);padding-top:16px;}

/* ---------- 帮助主题卡片区 ---------- */
.help-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.help-card{
  grid-column:span 2;
  display:flex;flex-direction:column;
  background:rgba(13,27,44,.55);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.help-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 22px 48px -22px rgba(0,0,0,.9), 0 0 0 1px rgba(31,217,196,.32);
}
.help-card--lg{grid-column:span 3;}
.card-media{
  position:relative;
  overflow:hidden;
  border-radius:0;
  aspect-ratio:16/10;
}
.help-card--sm .card-media{aspect-ratio:3/2;}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s var(--ease);}
.help-card:hover .card-media img{transform:scale(1.04);}
.card-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.05),rgba(5,10,18,.62));
}
.card-badge{
  position:absolute;left:14px;top:14px;z-index:2;
  font-size:12px;padding:5px 12px;border-radius:999px;
  background:rgba(5,10,18,.76);
  border:1px solid rgba(31,217,196,.42);
  color:var(--cyan-bright);
  backdrop-filter:blur(6px);
}
.card-badge.amber{border-color:rgba(255,179,92,.5);color:var(--amber);}
.card-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:20px;margin-bottom:12px;}
.help-card--sm .card-body h3{font-size:18px;}
.card-body p{color:var(--text-2);font-size:15.5px;line-height:1.8;margin-bottom:18px;}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:700;color:var(--cyan-bright);
}
.card-link::after{content:"→";transition:transform .22s var(--ease);}
.card-link:hover::after{transform:translateX(4px);}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.step{
  position:relative;
  padding:28px 24px;
  border-radius:var(--radius-card);
  background:linear-gradient(160deg,rgba(20,38,60,.72),rgba(8,17,30,.6));
  border:1px solid var(--line);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.step em{
  font-style:normal;font-family:var(--font-mono);
  font-size:13px;color:var(--cyan);
  display:inline-block;margin-bottom:14px;
  padding:4px 10px;border-radius:999px;
  background:rgba(31,217,196,.1);
  border:1px solid rgba(31,217,196,.3);
}
.step h3{font-size:18px;margin-bottom:10px;}
.step p{font-size:15px;color:var(--text-2);line-height:1.8;}

/* ---------- 参数行 ---------- */
.two-col{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start;}
.two-col.reverse{grid-template-columns:7fr 5fr;}
.panel{
  background:rgba(13,27,44,.55);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
  padding:30px;
}
.panel h3{font-size:20px;margin-bottom:8px;}
.panel .panel-note{font-size:14px;color:var(--text-3);margin-bottom:22px;}
.param-row{
  display:flex;align-items:baseline;gap:14px;
  padding:14px 0;
  border-bottom:1px dashed rgba(120,180,220,.18);
  font-size:15px;
}
.param-row:last-child{border-bottom:0;}
.param-row .k{color:var(--text-2);white-space:nowrap;}
.param-row .dots{flex:1;border-bottom:1px dashed rgba(120,180,220,.22);transform:translateY(-4px);}
.param-row .v{font-family:var(--font-mono);color:var(--cyan-bright);font-size:14px;white-space:nowrap;}
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:6px;}
.check-list li{
  position:relative;padding-left:28px;
  font-size:15.5px;color:var(--text-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px 2px rgba(31,217,196,.6);
}
.check-list li strong{color:var(--text);font-weight:700;}

/* ---------- 支持方式 ---------- */
.support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.support-card{
  padding:26px;
  border-radius:var(--radius-card);
  background:rgba(13,27,44,.5);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.support-card:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.support-card .icon{
  width:42px;height:42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(31,217,196,.24),rgba(122,92,255,.24));
  border:1px solid rgba(31,217,196,.28);
  margin-bottom:18px;font-size:18px;
}
.support-card h3{font-size:18px;margin-bottom:10px;}
.support-card p{font-size:15px;color:var(--text-2);margin-bottom:14px;}
.support-card .meta{font-family:var(--font-mono);font-size:13px;color:var(--amber);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border-radius:var(--radius-card);
  background:rgba(13,27,44,.55);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.05);
  overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item[open]{border-color:var(--line-strong);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;
  font-size:16.5px;font-weight:700;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--cyan-bright);}
.faq-icon{
  position:relative;flex:0 0 20px;width:20px;height:20px;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--cyan);border-radius:2px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{left:9px;top:0;width:2px;height:20px;}
.faq-item[open] .faq-icon{transform:rotate(135deg);}
.faq-body{
  padding:0 24px 22px;
  color:var(--text-2);font-size:15.5px;
  border-top:1px solid var(--line);
  padding-top:18px;
}

/* ---------- CTA 条 ---------- */
.cta-band{padding:0 0 96px;}
.cta-inner{
  position:relative;overflow:hidden;
  border-radius:22px;
  padding:52px 48px;
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(13,27,44,.92),rgba(8,17,30,.86));
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-inner::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(420px 220px at 8% 10%, rgba(31,217,196,.26), transparent 62%),
    radial-gradient(420px 240px at 92% 90%, rgba(122,92,255,.26), transparent 65%);
  pointer-events:none;
}
.cta-content{
  position:relative;z-index:2;
  display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center;
}
.cta-content h2{font-size:30px;margin-bottom:12px;}
.cta-content p{color:var(--text-2);font-size:16px;}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start;}
.cta-note{font-size:13px;color:var(--text-3);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-800);
  border-top:1px solid var(--line);
  box-shadow:0 -1px 0 rgba(31,217,196,.28);
  padding:72px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:5fr 2.4fr 2.4fr 2.4fr;gap:36px;
  padding-bottom:44px;
}
.footer-brand p{color:var(--text-3);font-size:14.5px;margin-top:16px;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text);}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14.5px;color:var(--text-3);}
.footer-col a:hover{color:var(--cyan-bright);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:14px 26px;justify-content:space-between;
  padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- 移动端底部条 / 返回顶部 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  display:none;align-items:center;justify-content:space-between;gap:14px;
  padding:12px 16px;
  background:rgba(8,17,30,.94);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line-strong);
  transform:translateY(100%);
  transition:transform .32s var(--ease);
}
.mobile-bar.show{transform:translateY(0);}
.mobile-bar .bar-text{font-size:13px;color:var(--text-2);}
.mobile-bar .bar-text strong{display:block;font-size:14.5px;color:var(--text);font-weight:800;}
.to-top{
  position:fixed;right:20px;bottom:96px;z-index:70;
  width:46px;height:46px;border-radius:14px;
  display:none;align-items:center;justify-content:center;
  background:rgba(13,27,44,.8);
  border:1px solid var(--line-strong);
  color:var(--cyan-bright);font-size:18px;
  backdrop-filter:blur(10px);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.to-top:hover{transform:translateY(-4px);box-shadow:0 12px 28px -12px rgba(31,217,196,.7);}
.to-top.show{display:flex;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links{display:none;}
  .burger{display:flex;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero h1{font-size:38px;}
  .two-col,.two-col.reverse{grid-template-columns:1fr;gap:30px;}
  .cta-content{grid-template-columns:1fr;gap:26px;}
  .help-card,.help-card--lg{grid-column:span 3;}
  .help-card--sm{grid-column:span 3;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .support-grid{grid-template-columns:1fr;gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:80px 0;}
  .section-head h2{font-size:29px;}
}
@media (max-width:767px){
  body{font-size:16px;padding-bottom:74px;}
  .container{padding:0 16px;}
  .topbar-tip{display:none;}
  .topbar-inner{justify-content:space-between;}
  .topbar-actions a:first-child{display:none;}
  .nav-wrap{min-height:62px;}
  .logo{font-size:15.5px;}
  .logo-mark{width:28px;height:28px;font-size:13px;}
  .nav-cta .btn-primary{display:none;}
  .section{padding:60px 0;}
  .section-head{margin-bottom:28px;}
  .section-head h2{font-size:24px;}
  .hero{padding:52px 0 48px;}
  .hero h1{font-size:29px;}
  .hero-sub{font-size:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-stats{gap:20px;}
  .hero-stats div strong{font-size:19px;}
  .help-grid{grid-template-columns:1fr;gap:18px;}
  .help-card,.help-card--lg,.help-card--sm{grid-column:span 1;}
  .steps{grid-template-columns:1fr;}
  .panel{padding:22px;}
  .cta-inner{padding:34px 22px;}
  .cta-content h2{font-size:23px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .faq-item summary{padding:17px 18px;font-size:16px;}
  .faq-body{padding:16px 18px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .mobile-bar{display:flex;}
  .to-top{bottom:88px;right:16px;}
}
@media (max-width:520px){
  .hero h1{font-size:26px;}
  .card-body{padding:20px;}
  .param-row{font-size:14px;}
  .param-row .v{font-size:13px;}
}