/* roulang page: index */
:root{
  --bg-0:#060A12;
  --bg-1:#0A111F;
  --bg-2:#101A2C;
  --brand:#1FD3C0;
  --brand-deep:#12B3A4;
  --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454;
  --accent-deep:#F09527;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB;
  --ink-1:#B9C6D8;
  --ink-2:#7E8EA6;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.03);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 10px 30px rgba(0,0,0,.45);
  --sh-3:0 18px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(31,211,192,.25),0 8px 30px rgba(31,211,192,.16);
  --sect:96px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-1);
  color:var(--ink-0);
  font-family:"HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  padding-bottom:76px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .22s ease;}
a:hover{color:#5BE7D8;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.4px;line-height:1.25;}
p{margin:0;}
ul,ol,dl,dd{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(31,211,192,.3);}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.wrap{max-width:1280px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-0);}
.brand:hover{color:var(--ink-0);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 55%,#0E8F84 100%);
  display:grid;place-items:center;color:#04121A;font-size:15px;font-weight:800;
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-name{font-size:15px;font-weight:700;letter-spacing:0;}
.brand-sub{font-size:11px;color:var(--ink-2);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-links a{
  position:relative;color:var(--ink-1);font-size:14px;padding:6px 0;
}
.nav-links a:hover{color:var(--ink-0);}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--ink-0);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;
  border-radius:var(--r-btn);border:1px solid rgba(31,211,192,.35);
  background:var(--brand-soft);color:var(--ink-0);font-size:13.5px;font-weight:600;
  transition:all .22s ease;
}
.nav-cta:hover{background:rgba(31,211,192,.2);color:var(--ink-0);border-color:var(--brand);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--glass);color:var(--ink-0);
}

/* ============ 按钮体系 ============ */
.btn-qk{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease,filter .22s ease;
}
.btn-qk:hover{transform:translateY(-2px);filter:brightness(1.06);}
.btn-qk:active{transform:translateY(1px);}
.btn-amber{
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-deep) 100%);
  color:#20140A;box-shadow:0 0 0 1px rgba(255,180,84,.3),0 10px 32px rgba(255,180,84,.22);
}
.btn-amber:hover{box-shadow:0 0 0 1px rgba(255,180,84,.45),0 16px 40px rgba(255,180,84,.32);color:#20140A;}
.btn-brand{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#04121A;box-shadow:var(--glow);
}
.btn-brand:hover{color:#04121A;}
.btn-outline{
  background:transparent;border-color:rgba(31,211,192,.42);color:var(--brand);
}
.btn-outline:hover{background:var(--brand-soft);color:#5BE7D8;}
.btn-ghost{
  background:transparent;border-color:var(--line-strong);color:var(--ink-1);
}
.btn-ghost:hover{color:var(--ink-0);border-color:rgba(255,255,255,.34);}
.btn-qk.sm{height:40px;padding:0 18px;font-size:14px;}

/* ============ 通用板块 ============ */
.section{padding:var(--sect) 0;position:relative;}
.section.alt{background:var(--bg-2);}
.section::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.28),transparent);
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap;}
.section-head h2{font-size:32px;}
.section-head .lead{color:var(--ink-2);font-size:15px;margin-top:10px;max-width:640px;}
.link-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(6,10,18,.86) 0%,rgba(10,17,31,.92) 55%,var(--bg-1) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.hero-inner{
  position:relative;display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;
  padding:76px 0 88px;
}
.hero-inner::after{
  content:"";position:absolute;top:-140px;left:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,211,192,.22) 0%,rgba(31,211,192,0) 68%);
  pointer-events:none;
}
.hero-copy{position:relative;z-index:2;}
.hero h1{
  font-size:48px;line-height:1.15;font-weight:700;letter-spacing:-.5px;
  margin:18px 0 16px;
}
.hero h1 .hl{
  background:linear-gradient(120deg,var(--brand) 0%,#7FE9DD 60%,var(--accent) 130%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:17px;color:var(--ink-1);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 13px;
  border-radius:var(--r-pill);background:var(--glass);border:1px solid var(--line);
  font-size:12px;color:var(--ink-1);
}
.chip .mono{font-family:var(--mono);color:var(--brand);font-size:12px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-media{position:relative;z-index:2;display:flex;justify-content:center;}
.device-frame{
  width:100%;max-width:360px;border-radius:26px;padding:12px;
  background:linear-gradient(160deg,rgba(255,255,255,.10),rgba(255,255,255,.02));
  border:1px solid var(--line-strong);
  box-shadow:var(--sh-3),0 0 0 1px rgba(31,211,192,.18);
}
.device-frame img{border-radius:18px;width:100%;height:auto;}
.device-glow{
  position:absolute;bottom:-26px;left:50%;transform:translateX(-50%);
  width:78%;height:60px;filter:blur(34px);background:rgba(31,211,192,.32);border-radius:50%;
}
.hero-version{
  position:absolute;top:18px;right:-8px;padding:8px 14px;border-radius:var(--r-pill);
  background:rgba(6,10,18,.82);border:1px solid rgba(31,211,192,.32);
  font-family:var(--mono);font-size:12px;color:var(--brand);
  box-shadow:var(--sh-2);
}

/* ============ 截图轮播 ============ */
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:22px;overflow-x:auto;padding:26px 4px 18px;
  scroll-snap-type:x mandatory;scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none;}
.shot{
  flex:0 0 258px;scroll-snap-align:center;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);padding:12px;
  transition:transform .3s ease,opacity .3s ease,border-color .3s ease,box-shadow .3s ease;
  opacity:.6;transform:scale(.96);
}
.shot.is-active{
  opacity:1;transform:scale(1) translateY(-12px);
  border-color:rgba(31,211,192,.4);box-shadow:var(--glow),var(--sh-3);
}
.shot img{border-radius:var(--r-img);width:100%;aspect-ratio:9/14;object-fit:cover;}
.shot-label{
  margin-top:12px;font-size:13px;color:var(--ink-1);text-align:center;
}
.shot.is-active .shot-label{color:var(--ink-0);}
.rail-dots{display:flex;justify-content:center;gap:8px;margin-top:16px;}
.rail-dots span{
  width:28px;height:4px;border-radius:var(--r-pill);background:rgba(255,255,255,.16);
  cursor:pointer;transition:all .25s ease;
}
.rail-dots span.is-active{width:40px;background:var(--brand);}

/* ============ 系统要求 ============ */
.spec-grid{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start;}
.spec-list{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);padding:8px 26px;}
.spec-list div{
  display:flex;justify-content:space-between;gap:20px;padding:20px 0;
  border-bottom:1px dashed rgba(255,255,255,.14);
}
.spec-list div:last-child{border-bottom:none;}
.spec-list dt{color:var(--ink-2);font-size:14px;}
.spec-list dd{color:var(--ink-0);font-size:14.5px;font-weight:600;text-align:right;}
.spec-list dd .mono{font-family:var(--mono);color:var(--brand);}
.spec-num{
  background:linear-gradient(160deg,rgba(31,211,192,.14),rgba(255,255,255,.03));
  border:1px solid rgba(31,211,192,.24);border-radius:var(--r-card);padding:34px 30px;
  box-shadow:var(--glow);
}
.spec-num .big{
  font-family:var(--mono);font-size:56px;font-weight:700;line-height:1.05;
  color:var(--brand);letter-spacing:-1px;
}
.spec-num .unit{font-size:15px;color:var(--ink-1);margin-left:6px;}
.spec-num .note{margin-top:14px;font-size:13.5px;color:var(--ink-2);}
.spec-num .divider{height:1px;background:var(--line);margin:24px 0;}
.spec-num .ver{font-family:var(--mono);font-size:22px;color:var(--accent);}

/* ============ 评价墙 ============ */
.review-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rev-col{display:flex;flex-direction:column;gap:24px;}
.rev-col.off-1{margin-top:32px;}
.rev-col.off-2{margin-top:16px;}
.review{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);transition:all .25s ease;
}
.review:hover{border-color:rgba(31,211,192,.34);transform:translateY(-2px);box-shadow:var(--sh-2);}
.rev-top{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(31,211,192,.28),rgba(124,140,255,.28));
  color:var(--ink-0);font-size:14px;font-weight:700;border:1px solid var(--line-strong);
}
.rev-name{font-size:14px;font-weight:600;}
.stars{color:var(--accent);font-size:12px;letter-spacing:2px;}
.review p{font-size:14px;color:var(--ink-1);line-height:1.7;}
.rev-tag{
  display:inline-block;margin-top:14px;font-size:12px;padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(124,140,255,.14);color:#B4BDFF;border:1px solid rgba(124,140,255,.22);
}

/* ============ 下载按钮组 ============ */
.dl-card{
  border-radius:24px;padding:38px;
  background:linear-gradient(160deg,rgba(255,255,255,.08),rgba(255,255,255,.025));
  border:1px solid var(--line);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-3);
}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px;}
.dl-item{
  background:rgba(6,10,18,.42);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 18px;text-align:center;transition:all .25s ease;
}
.dl-item:hover{border-color:rgba(31,211,192,.34);transform:translateY(-2px);box-shadow:var(--sh-2);}
.dl-item .icon{font-size:22px;color:var(--brand);margin-bottom:12px;}
.dl-item .btn-qk{width:100%;}
.dl-meta{margin-top:12px;font-family:var(--mono);font-size:11px;color:var(--ink-2);line-height:1.6;}
.qr-box{
  width:104px;height:104px;margin:0 auto 14px;border-radius:12px;
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.08) 0 6px,transparent 6px 12px),
    linear-gradient(140deg,rgba(31,211,192,.22),rgba(255,255,255,.05));
  border:1px dashed rgba(31,211,192,.4);display:grid;place-items:center;
  color:var(--brand);font-size:26px;
}
.dl-note{margin-top:22px;font-size:13px;color:var(--ink-2);text-align:center;}

/* ============ 最新信息 CMS ============ */
.news-grid{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:start;}
.news-main{
  display:block;background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:all .25s ease;color:var(--ink-0);
}
.news-main:hover{border-color:rgba(31,211,192,.38);transform:translateY(-2px);box-shadow:var(--sh-2);color:var(--ink-0);}
.news-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-main-body{padding:24px;}
.news-main-body h3{font-size:22px;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-main-body p{font-size:14.5px;color:var(--ink-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{
  display:block;background:var(--glass-2);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;transition:all .25s ease;color:var(--ink-0);
}
.news-item:hover{border-color:rgba(31,211,192,.36);transform:translateY(-2px);background:var(--glass);color:var(--ink-0);}
.news-item h3{
  font-size:15.5px;font-weight:600;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-item p{
  font-size:13px;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-row{display:flex;align-items:center;gap:12px;margin-top:14px;font-size:12px;color:var(--ink-2);}
.meta-row .mono{font-family:var(--mono);}
.tag-cat{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;border:1px solid rgba(31,211,192,.22);
}
.empty-state{
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  text-align:center;padding:32px;
}
.empty-state i{font-size:28px;color:var(--brand);}
.empty-state span{font-size:14px;color:var(--ink-2);}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion-item{
  background:var(--glass-2);border:1px solid var(--line)!important;border-radius:14px!important;
  margin-bottom:14px;overflow:hidden;
}
.accordion-button{
  background:transparent!important;color:var(--ink-0)!important;font-size:17px;font-weight:600;
  padding:20px 24px;box-shadow:none!important;border-radius:14px!important;
}
.accordion-button:not(.collapsed){
  color:var(--ink-0)!important;background:rgba(31,211,192,.06)!important;
  box-shadow:inset 3px 0 0 var(--brand)!important;
}
.accordion-button::after{
  filter:invert(78%) sepia(38%) saturate(1400%) hue-rotate(122deg) brightness(96%);
}
.accordion-body{padding:4px 24px 22px;font-size:15px;color:var(--ink-1);line-height:1.8;}

/* ============ 表单 CTA ============ */
.cta-card{
  background:linear-gradient(140deg,rgba(31,211,192,.10),rgba(255,255,255,.03) 60%);
  border:1px solid rgba(31,211,192,.22);border-radius:24px;padding:38px;
  box-shadow:var(--sh-2);
}
.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px;}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;background:rgba(6,10,18,.5);border:1px solid var(--line);border-radius:var(--r-btn);
  padding:12px 14px;color:var(--ink-0);transition:all .22s ease;outline:none;
}
.field textarea{min-height:88px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:#5C6B80;}
.field input:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,211,192,.16);}
.form-foot{display:flex;align-items:center;gap:18px;margin-top:22px;flex-wrap:wrap;}
.form-foot .hint{font-size:13px;color:var(--ink-2);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 0;position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.35),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand .brand-mark{width:30px;height:30px;border-radius:9px;font-size:13px;}
.foot-brand span{font-size:15px;font-weight:700;}
.foot-desc{font-size:13.5px;color:var(--ink-2);max-width:320px;}
.foot-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;font-weight:600;}
.foot-col ul li{margin-bottom:11px;}
.foot-col ul a{font-size:13.5px;color:var(--ink-2);}
.foot-col ul a:hover{color:var(--brand);}
.foot-contact{font-size:13.5px;color:var(--ink-2);line-height:2;}
.foot-contact .mono{font-family:var(--mono);color:var(--ink-1);}
.foot-bottom{
  margin-top:52px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.foot-bottom span{font-size:13px;color:var(--ink-2);}
.to-top{
  width:40px;height:40px;border-radius:12px;background:var(--glass);border:1px solid var(--line);
  color:var(--ink-1);display:grid;place-items:center;transition:all .22s ease;
}
.to-top:hover{color:var(--brand);border-color:rgba(31,211,192,.35);transform:translateY(-2px);}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:1100;
  height:60px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(6,10,18,.9);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-top:1px solid var(--line);
  display:none;grid-template-columns:repeat(5,1fr);
}
.mobile-tab a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--ink-2);font-size:10px;position:relative;
}
.mobile-tab a i{font-size:17px;}
.mobile-tab a.active{color:var(--brand);}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--brand);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero h1{font-size:42px;}
  .dl-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  :root{--sect:76px;}
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:grid;place-items:center;margin-left:auto;}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:56px 0 64px;}
  .hero h1{font-size:36px;}
  .hero-media{order:2;}
  .device-frame{max-width:300px;}
  .hero-version{right:0;}
  .spec-grid,.news-grid{grid-template-columns:1fr;}
  .review-wall{grid-template-columns:repeat(2,1fr);}
  .rev-col.off-1,.rev-col.off-2{margin-top:0;}
  .form-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:repeat(2,1fr);}
  .mobile-tab{display:grid;}
}
@media (max-width:575px){
  :root{--sect:60px;}
  .wrap{padding:0 20px;}
  .hero h1{font-size:30px;}
  .hero-sub{font-size:15.5px;}
  .hero-media img{max-height:320px;object-fit:cover;border-radius:18px;}
  .btn-qk{width:100%;}
  .hero-actions{flex-direction:column;}
  .section-head h2{font-size:24px;}
  .dl-grid,.review-wall,.foot-grid{grid-template-columns:1fr;}
  .dl-card,.cta-card,.spec-num{padding:24px;}
  .spec-num .big{font-size:44px;}
  .review-wall{gap:16px;}
  .shot{flex:0 0 220px;}
}
@media (max-width:991px){
  .mobile-menu{
    display:none;padding:14px 0 22px;border-top:1px solid var(--line);margin-top:8px;
  }
  .mobile-menu.open{display:block;}
  .mobile-menu a{
    display:block;padding:13px 4px;font-size:15px;color:var(--ink-1);border-bottom:1px dashed rgba(255,255,255,.08);
  }
  .mobile-menu a.active{color:var(--brand);}
}
.mobile-menu{display:none;}

/* roulang page: article */
:root{
  --bg-0:#060A12;
  --bg-1:#0A111F;
  --bg-2:#101A2C;
  --brand:#1FD3C0;
  --brand-deep:#12B3A4;
  --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB;
  --ink-1:#B9C6D8;
  --ink-2:#7E8EA6;
  --glass:rgba(255,255,255,.055);
  --glass-brd:rgba(255,255,255,.10);
  --brand-brd:rgba(31,211,192,.22);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow-s:0 2px 10px rgba(0,0,0,.35);
  --shadow-m:0 10px 30px rgba(0,0,0,.45);
  --shadow-h:0 18px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(31,211,192,.25),0 8px 30px rgba(31,211,192,.16);
  --glow-strong:0 0 0 1px rgba(255,180,84,.32),0 10px 34px rgba(255,180,84,.24);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-1);
  color:var(--ink-1);
  font-family:"HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (max-width:991px){body{padding-bottom:76px}}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .22s ease}
a:hover{color:#5ce6d6}
h1,h2,h3,h4{margin:0;color:var(--ink-0);letter-spacing:-.3px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
::selection{background:rgba(31,211,192,.28);color:#fff}
.mono{font-family:var(--mono);letter-spacing:.02em}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:575px){.wrap{padding:0 20px}}
@media (min-width:1440px){.wrap{max-width:1280px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(6,10,18,.72);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .3s ease,border-color .3s ease;
}
.site-header.scrolled{background:rgba(6,10,18,.92);border-bottom-color:rgba(31,211,192,.18)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:15.5px;white-space:nowrap}
.brand:hover{color:var(--ink-0)}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04141a;font-weight:800;font-size:16px;
  box-shadow:0 6px 18px rgba(31,211,192,.3);
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;color:var(--ink-1);font-size:14.5px;padding:22px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--ink-0)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink-0)}
.nav-links a.active::after{transform:scaleX(1)}
.header-cta{margin-left:8px}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:var(--glass);border:1px solid var(--glass-brd);color:var(--ink-0);
  place-items:center;font-size:17px;cursor:pointer;transition:border-color .22s ease,background .22s ease;
}
.nav-toggle:hover{border-color:var(--brand-brd);background:var(--brand-soft)}
@media (max-width:991px){
  .nav-links{
    display:none;position:absolute;top:68px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(6,10,18,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-bottom:1px solid rgba(255,255,255,.1);
    padding:8px 24px 18px;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 0;border-bottom:1px solid rgba(255,255,255,.06);width:100%}
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--brand)}
  .header-cta{display:none}
  .nav-toggle{display:grid}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;
  font-size:14.5px;font-weight:600;padding:11px 20px;line-height:1.2;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease,filter .22s ease;
  text-align:center;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-block{width:100%}
.btn-brand{background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#04141a;box-shadow:var(--glow)}
.btn-brand:hover{color:#04141a;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(31,211,192,.4),0 12px 34px rgba(31,211,192,.28)}
.btn-brand:active{transform:translateY(1px)}
.btn-accent{background:linear-gradient(135deg,#FFC978,var(--accent));color:#2A1703;box-shadow:var(--glow-strong)}
.btn-accent:hover{color:#2A1703;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(255,180,84,.45),0 14px 38px rgba(255,180,84,.34)}
.btn-accent:active{transform:translateY(1px)}
.btn-outline{background:transparent;border-color:var(--brand-brd);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand);border-color:var(--brand);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--ink-1)}
.btn-ghost:hover{color:var(--ink-0);border-color:rgba(255,255,255,.4);transform:translateY(-2px)}

/* ---------- 面包屑 ---------- */
.crumb-bar{
  border-bottom:1px solid rgba(255,255,255,.06);
  background:linear-gradient(180deg,rgba(16,26,44,.65),rgba(10,17,31,0));
}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px;
  font-size:13px;color:var(--ink-2);padding:16px 0;
}
.crumb li{display:flex;align-items:center;gap:6px;max-width:100%}
.crumb li:not(:last-child)::after{content:"›";color:rgba(255,255,255,.22);margin-left:6px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand)}
.crumb .current{color:var(--ink-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw}

/* ---------- 文章头部 ---------- */
.article-head{position:relative;padding:48px 0 8px;overflow:hidden}
.article-head::before{
  content:"";position:absolute;top:-160px;left:-10%;width:56%;height:420px;
  background:radial-gradient(circle at 40% 40%,rgba(31,211,192,.16),transparent 68%);
  pointer-events:none;
}
.article-head::after{
  content:"";position:absolute;top:-100px;right:-6%;width:44%;height:360px;
  background:radial-gradient(circle at 60% 40%,rgba(124,140,255,.14),transparent 70%);
  pointer-events:none;
}
.article-head .wrap{position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--brand);
  background:var(--brand-soft);border:1px solid var(--brand-brd);
  padding:5px 12px;border-radius:999px;letter-spacing:.04em;margin-bottom:18px;
}
.article-title{
  font-size:44px;line-height:1.18;font-weight:700;letter-spacing:-.5px;
  max-width:920px;margin-bottom:20px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13.5px;color:var(--ink-2);margin-bottom:32px;
}
.article-meta i{color:var(--brand);margin-right:5px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.18)}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 11px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);border:1px solid var(--brand-brd);
}
.pill-violet{background:rgba(124,140,255,.12);color:#A9B4FF;border-color:rgba(124,140,255,.26)}
.article-cover{
  margin:0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--glass-brd);box-shadow:var(--shadow-m);
  aspect-ratio:16/9;background:linear-gradient(135deg,#0E1B2C,#122238);
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ---------- 正文布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);
  gap:48px;padding:56px 0 0;align-items:start;
}
@media (max-width:991px){
  .article-layout{grid-template-columns:1fr;gap:36px;padding-top:36px}
}
.article-body{
  max-width:760px;font-size:16px;line-height:1.85;color:var(--ink-1);
}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:26px;line-height:1.35;font-weight:700;color:var(--ink-0);
  margin:44px 0 18px;padding-left:14px;border-left:3px solid var(--brand);
}
.article-body h3{
  font-size:20px;line-height:1.45;font-weight:600;color:var(--ink-0);
  margin:32px 0 14px;padding-left:12px;border-left:3px solid rgba(31,211,192,.5);
}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink-0);margin:24px 0 12px}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(31,211,192,.35)}
.article-body a:hover{color:#5ce6d6;border-bottom-color:#5ce6d6}
.article-body strong{color:var(--ink-0);font-weight:600}
.article-body img{max-width:100%;height:auto;border-radius:var(--r-img);margin:26px auto;border:1px solid var(--glass-brd)}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;border-left:3px solid var(--brand);
  background:rgba(31,211,192,.07);border-radius:0 14px 14px 0;color:var(--ink-1);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.2em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.55em}
.article-body li::marker{color:var(--brand)}
.article-body pre{
  background:rgba(255,255,255,.05);border:1px solid var(--glass-brd);
  border-radius:var(--r-img);padding:16px 18px;overflow:auto;margin:24px 0;
  font-family:var(--mono);font-size:14px;line-height:1.7;color:var(--ink-0);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.article-body code{
  font-family:var(--mono);background:rgba(255,255,255,.08);
  padding:2px 6px;border-radius:6px;font-size:.92em;color:var(--brand);
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  border-radius:var(--r-img);overflow:hidden;
}
.article-body th,.article-body td{border:1px solid var(--glass-brd);padding:12px 14px;text-align:left}
.article-body th{background:rgba(255,255,255,.06);color:var(--ink-0);font-weight:600}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.028)}
.article-body hr{
  border:none;height:1px;margin:38px 0;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.38),transparent);
}

/* ---------- 空态 ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:280px;padding:48px 24px;text-align:center;
  background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--r-card);
  -webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);
}
.empty-state i{font-size:30px;color:var(--brand)}
.empty-state p{font-size:14.5px;color:var(--ink-1);max-width:420px}
.empty-state .btn{margin-top:6px}

/* ---------- 文末 ---------- */
.article-foot{
  max-width:760px;margin-top:44px;padding-top:28px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  font-size:12px;padding:5px 12px;border-radius:999px;
  background:rgba(124,140,255,.1);color:#A9B4FF;border:1px solid rgba(124,140,255,.22);
  transition:background .22s ease,color .22s ease,border-color .22s ease;
}
.tag:hover{background:rgba(124,140,255,.2);color:#C4CBFF;border-color:rgba(124,140,255,.4)}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px}
@media (max-width:991px){.article-side{position:static;top:auto}}
.side-card{
  background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-s);
  -webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.side-card:hover{border-color:var(--brand-brd);transform:translateY(-2px);box-shadow:var(--shadow-m)}
.side-title{
  font-size:15px;font-weight:600;color:var(--ink-0);margin-bottom:10px;
  display:flex;align-items:center;gap:8px;
}
.side-title i{color:var(--brand);font-size:14px}
.side-desc{font-size:13.5px;color:var(--ink-2);line-height:1.7;margin-bottom:16px}
.side-meta{font-size:11.5px;color:var(--ink-2);text-align:center;margin-top:10px}
.side-list li+li{margin-top:2px}
.side-list a{
  display:flex;align-items:center;gap:10px;padding:10px 0;
  font-size:14px;color:var(--ink-1);border-bottom:1px solid rgba(255,255,255,.06);
  transition:color .22s ease,padding-left .22s ease;
}
.side-list li:last-child a{border-bottom:none}
.side-list a::before{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--brand);
  flex:0 0 5px;opacity:.65;transition:opacity .22s ease;
}
.side-list a:hover{color:var(--brand);padding-left:4px}
.side-list a:hover::before{opacity:1}
.side-quiet{padding:16px;background:rgba(255,255,255,.03)}

/* ---------- 延伸阅读 ---------- */
.next-read{padding:72px 0 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.sec-head h2{font-size:26px;font-weight:700}
.sec-head p{font-size:14px;color:var(--ink-2);margin-top:6px}
.read-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
@media (max-width:767px){.read-grid{grid-template-columns:1fr}}
.read-card{
  display:flex;gap:16px;align-items:center;padding:18px;
  background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--r-card);
  color:var(--ink-1);box-shadow:var(--shadow-s);
  -webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.read-card:hover{color:var(--ink-1);border-color:var(--brand-brd);transform:translateY(-2px);box-shadow:var(--shadow-m)}
.read-thumb{
  width:88px;height:66px;flex:0 0 88px;border-radius:12px;overflow:hidden;
  background:linear-gradient(135deg,#0F1E31,#16324A);
}
.read-thumb img{width:100%;height:100%;object-fit:cover}
.read-card h3{font-size:15.5px;font-weight:600;color:var(--ink-0);margin-bottom:6px;line-height:1.5}
.read-card span{font-size:12.5px;color:var(--ink-2)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:88px;background:var(--bg-0);
  border-top:1px solid rgba(255,255,255,.07);position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.35),transparent);
}
.foot-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;
  padding:56px 0 40px;
}
@media (max-width:991px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}}
@media (max-width:575px){.foot-grid{grid-template-columns:1fr;gap:28px}}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:15px;margin-bottom:14px}
.foot-desc{font-size:13.5px;color:var(--ink-2);line-height:1.8;max-width:340px}
.foot-col h4{font-size:14px;color:var(--ink-0);font-weight:600;margin-bottom:16px}
.foot-col li+li{margin-top:10px}
.foot-col a{font-size:13.5px;color:var(--ink-2)}
.foot-col a:hover{color:var(--brand)}
.foot-contact div{font-size:13px;color:var(--ink-2);margin-bottom:9px;line-height:1.6}
.foot-contact .mono{color:var(--brand);font-size:12.5px}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.06);
  font-size:12.5px;color:var(--ink-2);
}
.to-top{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-brd);color:var(--ink-1);
  transition:border-color .22s ease,color .22s ease,transform .22s ease;
}
.to-top:hover{color:var(--brand);border-color:var(--brand-brd);transform:translateY(-2px)}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:120;display:none;
  background:rgba(6,10,18,.94);
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
  border-top:1px solid rgba(255,255,255,.08);
  padding-bottom:env(safe-area-inset-bottom,0);
}
.tab-item{
  flex:1;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:60px;color:var(--ink-2);font-size:10px;
  transition:color .22s ease;
}
.tab-item i{font-size:17px}
.tab-item:hover{color:var(--ink-1)}
.tab-item.active{color:var(--brand)}
.tab-item.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:0 0 3px 3px;background:var(--brand);
}
@media (max-width:991px){.mobile-tab{display:flex}}

@media (max-width:767px){
  .article-title{font-size:30px;letter-spacing:-.2px}
  .article-head{padding-top:32px}
  .article-body h2{font-size:22px;margin-top:34px}
  .article-body h3{font-size:18px}
  .article-layout{padding-top:30px;gap:30px}
  .side-card,.read-card{box-shadow:none}
  .next-read{padding-top:52px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:8px}
}

/* roulang page: category1 */
:root{
  --bg-0:#060A12; --bg-1:#0A111F; --bg-2:#101A2C;
  --brand:#1FD3C0; --brand-deep:#12B3A4; --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454; --accent-deep:#E89B34;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB; --ink-1:#B9C6D8; --ink-2:#7E8EA6;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --glass:rgba(255,255,255,.055);
  --r-card:18px; --r-btn:12px; --r-img:14px; --r-pill:999px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 10px 30px rgba(0,0,0,.45);
  --sh-3:0 18px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(31,211,192,.25), 0 8px 30px rgba(31,211,192,.16);
  --glow-accent:0 0 0 1px rgba(255,180,84,.30), 0 10px 34px rgba(255,180,84,.20);
  --shell:1200px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; padding:0 0 76px;
  background:var(--bg-1); color:var(--ink-1);
  font-family:"HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px; line-height:1.75; letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--brand);text-decoration:none;transition:color .22s ease}
a:hover{color:#5FE7D8}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
ul{list-style:none;padding:0}
button,input,textarea,select{font:inherit;color:inherit}
.mono{font-family:var(--mono);letter-spacing:0}
.wrap{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px}
@media (min-width:1440px){.wrap{max-width:1280px}}
.divider{height:1px;background:linear-gradient(90deg,transparent,rgba(31,211,192,.25),transparent)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:68px;
  display:flex;align-items:center;
  background:rgba(6,10,18,.55);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;transition:background .25s ease,border-color .25s ease;
}
.site-header.scrolled{background:rgba(6,10,18,.82);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04140F;font-weight:800;font-size:17px;
  box-shadow:0 6px 18px rgba(31,211,192,.28);
}
.brand-text{color:var(--ink-0);font-weight:700;font-size:15.5px;letter-spacing:.02em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-links a{
  position:relative;color:var(--ink-1);font-size:14.5px;padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-deep));
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--ink-0)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink-0)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{
  margin-left:22px;flex-shrink:0;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--r-btn);font-size:14px;font-weight:600;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#04140F;
  box-shadow:0 6px 20px rgba(31,211,192,.26);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.nav-cta:hover{transform:translateY(-2px);filter:brightness(1.06);color:#04140F;box-shadow:0 10px 26px rgba(31,211,192,.34)}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-0);
}
.nav-toggle:hover{border-color:var(--line-strong)}

/* ---------- buttons ---------- */
.btn-main,.btn-line,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease,filter .22s ease;
}
.btn-main{background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#04140F;box-shadow:0 8px 26px rgba(31,211,192,.26)}
.btn-main:hover{transform:translateY(-2px);filter:brightness(1.06);color:#04140F;box-shadow:0 14px 34px rgba(31,211,192,.36)}
.btn-accent{background:linear-gradient(135deg,var(--accent),var(--accent-deep));color:#241503;box-shadow:var(--glow-accent)}
.btn-accent:hover{transform:translateY(-2px);filter:brightness(1.06);color:#241503;box-shadow:0 16px 40px rgba(255,180,84,.32)}
.btn-line{background:transparent;border-color:rgba(31,211,192,.45);color:var(--brand)}
.btn-line:hover{background:var(--brand-soft);transform:translateY(-2px);color:var(--brand);border-color:var(--brand)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink-1)}
.btn-ghost:hover{background:rgba(255,255,255,.05);transform:translateY(-2px);color:var(--ink-0);border-color:rgba(255,255,255,.32)}
.btn-main:active,.btn-accent:active,.btn-line:active,.btn-ghost:active{transform:translateY(1px)}
.btn-main:focus-visible,.btn-accent:focus-visible,.btn-line:focus-visible,.btn-ghost:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;
}

/* ---------- hero ---------- */
.hero{position:relative;padding:126px 0 72px;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.30;filter:saturate(120%);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 420px at 18% 8%,rgba(31,211,192,.20),transparent 62%),
    radial-gradient(560px 380px at 88% 84%,rgba(124,140,255,.14),transparent 66%),
    linear-gradient(180deg,rgba(6,10,18,.90),rgba(10,17,31,.97));
}
.hero-inner{position:relative;display:grid;grid-template-columns:6fr 5fr;gap:48px;align-items:center}
.pill-badge{
  display:inline-flex;align-items:center;gap:9px;padding:7px 14px;border-radius:var(--r-pill);
  background:var(--glass);border:1px solid rgba(31,211,192,.28);
  color:var(--ink-1);font-size:12.5px;font-family:var(--mono);
  backdrop-filter:blur(10px);
}
.pill-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand)}
.hero h1{
  margin:20px 0 16px;color:var(--ink-0);
  font-size:48px;line-height:1.15;font-weight:700;letter-spacing:-.5px;max-width:16em;
}
.hero-sub{font-size:17px;color:var(--ink-1);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-media{
  position:relative;border-radius:24px;padding:16px;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--sh-3);
}
.hero-media img{border-radius:var(--r-img);aspect-ratio:4/3;object-fit:cover;width:100%}
.hero-media figcaption{
  display:flex;justify-content:space-between;gap:12px;margin-top:12px;
  font-size:12.5px;color:var(--ink-2);font-family:var(--mono);
}

/* ---------- sections ---------- */
.section{padding:88px 0;position:relative}
.section.alt{background:var(--bg-2)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{
  color:var(--ink-0);font-size:32px;line-height:1.25;font-weight:700;margin-bottom:14px;letter-spacing:-.3px;
}
.section-head p{font-size:15.5px;color:var(--ink-1);max-width:760px}
.eyebrow{
  display:inline-block;margin-bottom:14px;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;letter-spacing:.08em;
}

/* ---------- timeline ---------- */
.tl-layout{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:start}
.timeline{position:relative}
.tl-item{position:relative;padding:0 0 34px 68px}
.tl-item::before{
  content:"";position:absolute;left:21px;top:46px;bottom:4px;width:2px;
  background:linear-gradient(180deg,rgba(31,211,192,.42),rgba(31,211,192,.05));
}
.tl-item:last-child{padding-bottom:0}
.tl-item:last-child::before{display:none}
.tl-num{
  position:absolute;left:0;top:0;width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;font-family:var(--mono);font-size:14px;font-weight:700;
  color:var(--brand);background:rgba(31,211,192,.10);border:1px solid rgba(31,211,192,.40);
  box-shadow:0 0 0 6px rgba(31,211,192,.05);
}
.tl-card{
  padding:22px 24px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--sh-1);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.tl-card:hover{border-color:rgba(31,211,192,.30);transform:translateY(-2px);box-shadow:var(--sh-2)}
.tl-card h3{color:var(--ink-0);font-size:19px;font-weight:600;margin-bottom:8px}
.tl-card p{font-size:14.8px;color:var(--ink-1)}
.tl-meta{margin-top:12px;font-family:var(--mono);font-size:12.5px;color:var(--ink-2)}
.tl-side{position:sticky;top:96px;display:grid;gap:20px}
.side-card{
  padding:22px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid var(--line);backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--sh-1);
}
.side-card img{aspect-ratio:16/9;object-fit:cover;margin-bottom:16px}
.side-card h3{color:var(--ink-0);font-size:17px;font-weight:600;margin-bottom:10px}
.side-card ul{display:grid;gap:9px}
.side-card li{font-size:14px;color:var(--ink-1);display:flex;gap:10px;align-items:flex-start}
.side-card li i{color:var(--brand);margin-top:5px;font-size:12px}

/* ---------- download channels ---------- */
.dl-card{
  padding:32px;border-radius:24px;background:var(--glass);
  border:1px solid rgba(31,211,192,.22);backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--glow);
}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:26px}
.dl-item{
  padding:22px 20px;border-radius:var(--r-card);background:rgba(255,255,255,.04);
  border:1px solid var(--line);display:flex;flex-direction:column;gap:14px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.dl-item:hover{transform:translateY(-3px);border-color:rgba(31,211,192,.32);box-shadow:var(--sh-2)}
.dl-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:18px;
}
.dl-item h3{color:var(--ink-0);font-size:16.5px;font-weight:600}
.dl-item p{font-size:13.5px;color:var(--ink-2);line-height:1.7}
.dl-item .btn-main,.dl-item .btn-line,.dl-item .btn-ghost{width:100%;padding:11px 16px;font-size:14px}
.dl-note{font-family:var(--mono);font-size:11px;color:var(--ink-2);margin-top:2px}
.qr-box{
  width:100%;aspect-ratio:1/1;max-width:120px;border-radius:14px;
  background:
    linear-gradient(135deg,rgba(31,211,192,.14),rgba(124,140,255,.10));
  border:1px dashed rgba(31,211,192,.35);display:grid;place-items:center;
  color:var(--brand);font-size:26px;
}

/* ---------- spec ---------- */
.spec-layout{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.spec-list{display:grid;gap:0}
.spec-row{
  display:flex;justify-content:space-between;gap:24px;align-items:baseline;
  padding:18px 0;border-bottom:1px dashed var(--line);
}
.spec-row:first-child{border-top:1px dashed var(--line)}
.spec-row dt{font-size:14.5px;color:var(--ink-1)}
.spec-row dd{font-family:var(--mono);font-size:14.5px;color:var(--ink-0)}
.big-stats{display:grid;gap:18px}
.big-stat{
  padding:24px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid var(--line);backdrop-filter:blur(16px);box-shadow:var(--sh-1);
}
.big-stat .num{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--brand);line-height:1.1}
.big-stat .num.accent{color:var(--accent)}
.big-stat .lbl{font-size:13.5px;color:var(--ink-2);margin-top:8px}

/* ---------- issue cards ---------- */
.issue-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.issue-card{
  padding:24px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid var(--line);backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-1);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.issue-card:hover{transform:translateY(-2px);border-color:rgba(124,140,255,.32);box-shadow:var(--sh-2)}
.issue-card h3{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-size:17px;font-weight:600;margin-bottom:10px}
.issue-card h3 i{color:var(--violet);font-size:15px}
.issue-card p{font-size:14.5px;color:var(--ink-1)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  padding:5px 11px;border-radius:var(--r-pill);font-size:12px;
  background:var(--brand-soft);color:var(--brand);border:1px solid rgba(31,211,192,.20);
}
.tag.violet{background:rgba(124,140,255,.12);color:#A6B1FF;border-color:rgba(124,140,255,.24)}

/* ---------- faq ---------- */
.faq .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card)!important;
  margin-bottom:14px;overflow:hidden;backdrop-filter:blur(16px) saturate(140%);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq .accordion-item:hover{border-color:rgba(31,211,192,.28)}
.faq .accordion-button{
  background:transparent;color:var(--ink-0);font-size:17px;font-weight:600;
  padding:20px 22px;box-shadow:none!important;border-radius:0;
}
.faq .accordion-button:not(.collapsed){
  color:var(--ink-0);background:rgba(255,255,255,.03);
  border-left:3px solid var(--brand);
}
.faq .accordion-button::after{
  content:"+";background-image:none!important;transform:none!important;
  font-size:22px;font-weight:400;color:var(--brand);line-height:1;
  width:auto;height:auto;display:inline-flex;align-items:center;margin-left:auto;
}
.faq .accordion-button:not(.collapsed)::after{content:"−";color:var(--brand)}
.faq .accordion-body{padding:0 22px 22px;font-size:15px;line-height:1.8;color:var(--ink-1)}
.faq .accordion-button:focus{box-shadow:none!important;outline:2px solid var(--brand);outline-offset:-2px}

/* ---------- cta ---------- */
.cta-block{
  padding:44px;border-radius:24px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(31,211,192,.14),rgba(124,140,255,.10));
  border:1px solid rgba(31,211,192,.24);backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-2);
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-block h2{color:var(--ink-0);font-size:28px;font-weight:700;line-height:1.3;margin-bottom:10px}
.cta-block p{font-size:15px;color:var(--ink-1);max-width:44em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{
  background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0;
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.30),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:15.5px;margin-bottom:14px}
.foot-brand .brand-mark{width:30px;height:30px;border-radius:9px;font-size:15px}
.foot-desc{font-size:13.5px;color:var(--ink-2);max-width:34em;line-height:1.8}
.foot-col h4{color:var(--ink-0);font-size:14.5px;font-weight:600;margin-bottom:16px}
.foot-col ul{display:grid;gap:11px}
.foot-col a{color:var(--ink-2);font-size:13.5px}
.foot-col a:hover{color:var(--brand)}
.foot-contact div{font-size:13.5px;color:var(--ink-2);margin-bottom:10px}
.foot-contact .mono{color:var(--ink-0)}
.foot-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--ink-2);
}
.to-top{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
  transition:transform .22s ease,border-color .22s ease,color .22s ease;
}
.to-top:hover{transform:translateY(-2px);border-color:rgba(31,211,192,.4);color:var(--brand)}

/* ---------- mobile tab bar ---------- */
.tab-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1100;height:60px;
  padding-bottom:env(safe-area-inset-bottom);
  display:none;align-items:center;justify-content:space-around;
  background:rgba(6,10,18,.92);backdrop-filter:blur(16px) saturate(140%);
  border-top:1px solid var(--line);
}
.tab-bar a{
  position:relative;flex:1;height:60px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:3px;
  color:var(--ink-2);font-size:10px;
}
.tab-bar a i{font-size:17px}
.tab-bar a.active{color:var(--brand)}
.tab-bar a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--brand);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero h1{font-size:42px}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:grid;place-items:center}
  .nav-links.open{
    display:flex;position:absolute;top:68px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(6,10,18,.97);border-bottom:1px solid var(--line);
    padding:12px 24px 20px;backdrop-filter:blur(16px);
  }
  .nav-links.open a{width:100%;padding:13px 0;border-bottom:1px solid var(--line)}
  .hero{padding:110px 0 60px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:36px;max-width:none}
  .tl-layout,.spec-layout{grid-template-columns:1fr;gap:32px}
  .tl-side{position:static}
  .cta-block{grid-template-columns:1fr;padding:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .section{padding:64px 0}
  .section-head h2{font-size:27px}
}
@media (max-width:767px){
  body{padding-bottom:74px}
  .tab-bar{display:flex}
  .hero h1{font-size:32px}
  .hero-sub{font-size:15.5px}
  .issue-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .dl-card{padding:24px}
  .hero-media img{aspect-ratio:16/10}
  .big-stat .num{font-size:28px}
}
@media (max-width:575px){
  .wrap{padding:0 20px}
  .hero{padding:100px 0 52px}
  .hero h1{font-size:29px;line-height:1.22}
  .section{padding:54px 0}
  .section-head h2{font-size:24px}
  .section-head{margin-bottom:32px}
  .tl-item{padding-left:56px}
  .tl-num{width:38px;height:38px;font-size:13px}
  .tl-item::before{left:18px;top:40px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .btn-main,.btn-line,.btn-ghost,.btn-accent{width:100%}
  .hero-actions{flex-direction:column}
  .cta-actions{flex-direction:column;width:100%}
}

/* roulang page: category2 */
:root{
  --bg-0:#060A12;
  --bg-1:#0A111F;
  --bg-2:#101A2C;
  --brand:#1FD3C0;
  --brand-deep:#12B3A4;
  --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB;
  --ink-1:#B9C6D8;
  --ink-2:#7E8EA6;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.10);
  --line-brand:rgba(31,211,192,.22);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 10px 30px rgba(0,0,0,.45);
  --sh-3:0 18px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(31,211,192,.25),0 8px 30px rgba(31,211,192,.16);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --t:.22s ease;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-1);
  color:var(--ink-1);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t);}
a:hover{color:#5CE7D8;}
h1,h2,h3,h4{margin:0;color:var(--ink-0);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,textarea{font:inherit;color:inherit;}
.mono{font-family:var(--mono);letter-spacing:.01em;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media(min-width:1440px){.wrap{max-width:1280px;}}
::selection{background:rgba(31,211,192,.3);color:#fff;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,10,18,.6);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t);
}
.site-header.is-scrolled{background:rgba(6,10,18,.88);border-bottom-color:rgba(255,255,255,.08);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:17px;letter-spacing:-.2px;white-space:nowrap;}
.brand:hover{color:var(--ink-0);}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#04120F;font-weight:800;font-size:16px;box-shadow:var(--glow);
}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--ink-1);padding:6px 0;}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:center;transition:transform var(--t);
}
.nav-links a:hover{color:var(--ink-0);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--ink-0);}
.nav-links a.active::after{transform:scaleX(1);}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;display:none;
  grid-template-columns:repeat(5,1fr);
  background:rgba(6,10,18,.94);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid rgba(255,255,255,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:10px;color:var(--ink-2);letter-spacing:.02em;
}
.mobile-tab a i{font-size:17px;}
.mobile-tab a.active{color:var(--brand);}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--brand);
}

/* ---------- 通用按钮 ---------- */
.btn-brand,.btn-outline-brand,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t),filter var(--t);
  white-space:nowrap;line-height:1.2;
}
.btn-brand{background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#04120F;box-shadow:var(--glow);}
.btn-brand:hover{color:#04120F;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(31,211,192,.35),0 14px 34px rgba(31,211,192,.28);}
.btn-accent{background:linear-gradient(135deg,#FFC779,var(--accent));color:#2A1700;box-shadow:0 0 0 1px rgba(255,180,84,.3),0 12px 32px rgba(255,180,84,.26);}
.btn-accent:hover{color:#2A1700;transform:translateY(-2px);filter:brightness(1.05);}
.btn-outline-brand{background:transparent;border-color:var(--line-brand);color:var(--brand);}
.btn-outline-brand:hover{background:var(--brand-soft);color:var(--brand);border-color:var(--brand);transform:translateY(-2px);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--ink-1);}
.btn-ghost:hover{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.34);color:var(--ink-0);transform:translateY(-2px);}
.btn-brand:active,.btn-accent:active,.btn-outline-brand:active,.btn-ghost:active{transform:translateY(1px);box-shadow:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:8px;
}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ---------- 胶囊 / 标签 ---------- */
.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--brand-soft);color:var(--brand);border:1px solid var(--line-brand);
}
.pill-violet{background:rgba(124,140,255,.14);color:#A9B4FF;border-color:rgba(124,140,255,.26);}
.pill-accent{background:rgba(255,180,84,.14);color:var(--accent);border-color:rgba(255,180,84,.28);}
.pill-mono{font-family:var(--mono);font-weight:500;letter-spacing:0;}

/* ---------- 首屏 ---------- */
.page-hero{position:relative;padding:64px 0 72px;overflow:hidden;background:var(--bg-0);}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;opacity:.18;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 360px at 14% 16%,rgba(31,211,192,.20),transparent 68%),
             linear-gradient(180deg,rgba(6,10,18,.55),var(--bg-1) 94%);
}
.hero-card{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  background:var(--glass);border:1px solid var(--line);border-radius:24px;
  padding:48px;backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-2);overflow:hidden;
}
.hero-card::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,211,192,.22),transparent 66%);pointer-events:none;
}
.hero-copy{position:relative;z-index:2;}
.hero-copy h1{font-size:46px;line-height:1.15;letter-spacing:-.5px;margin:18px 0 16px;}
.hero-copy h1 em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:17px;color:var(--ink-1);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-visual{position:relative;z-index:2;}
.hero-visual img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--line);box-shadow:var(--sh-2);
}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0;position:relative;}
.section-alt{background:var(--bg-2);}
.section-alt::before,.section-lined::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.45),transparent);
}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head h2{font-size:32px;line-height:1.25;margin:14px 0 14px;}
.section-head p{font-size:16px;color:var(--ink-1);}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- 交替图文 ---------- */
.zz-row{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
  margin-bottom:64px;
}
.zz-row:last-child{margin-bottom:0;}
.zz-row.reverse{grid-template-columns:7fr 5fr;}
.zz-row.reverse .zz-media{grid-column:2;grid-row:1;}
.zz-row.reverse .zz-text{grid-column:1;grid-row:1;}
.zz-media{position:relative;}
.zz-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--line);box-shadow:var(--sh-2);
}
.zz-media::before{
  content:"";position:absolute;inset:-10px -10px auto auto;width:120px;height:120px;border-radius:20px;
  background:radial-gradient(circle,rgba(31,211,192,.22),transparent 70%);z-index:-1;
}
.zz-text h3{font-size:24px;line-height:1.4;margin:16px 0 14px;}
.zz-text p{font-size:16px;color:var(--ink-1);max-width:620px;}
.zz-list{margin-top:20px;display:grid;gap:10px;}
.zz-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink-1);}
.zz-list li i{color:var(--brand);font-size:13px;margin-top:7px;flex:0 0 auto;}
.zz-note{
  margin-top:22px;padding:14px 16px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px dashed var(--line);
  font-size:14px;color:var(--ink-2);display:flex;gap:10px;align-items:flex-start;
}
.zz-note i{color:var(--accent);margin-top:4px;}

/* ---------- 准备清单 ---------- */
.prep-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.prep-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.prep-card:hover{transform:translateY(-2px);border-color:var(--line-brand);box-shadow:var(--sh-3);}
.prep-icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:18px;border:1px solid var(--line-brand);
  margin-bottom:18px;
}
.prep-card h3{font-size:19px;margin-bottom:10px;}
.prep-card p{font-size:15px;color:var(--ink-1);}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;gap:18px;}
.step{
  display:grid;grid-template-columns:76px 1fr;gap:24px;align-items:start;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 28px;transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.step:hover{border-color:var(--line-brand);transform:translateY(-2px);box-shadow:var(--sh-3);}
.step-num{
  font-family:var(--mono);font-size:26px;font-weight:600;color:var(--brand);
  line-height:1;padding-top:4px;border-right:1px solid var(--line);
}
.step h3{font-size:19px;margin-bottom:8px;}
.step p{font-size:15px;color:var(--ink-1);}

/* ---------- FAQ ---------- */
.faq-acc .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:14px;overflow:hidden;
}
.faq-acc .accordion-item:last-child{margin-bottom:0;}
.faq-acc .accordion-button{
  position:relative;background:transparent;color:var(--ink-0);
  font-size:17px;font-weight:600;line-height:1.5;
  padding:20px 22px 20px 26px;box-shadow:none;border-radius:var(--r-card);
  display:flex;align-items:center;gap:14px;
}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:var(--brand);opacity:0;transition:opacity var(--t);
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand);background:var(--brand-soft);box-shadow:none;
}
.faq-acc .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-acc .accordion-button:focus{box-shadow:none;}
.faq-acc .accordion-button::after{
  content:"";background-image:none;width:9px;height:9px;flex:0 0 9px;margin-left:auto;
  border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg);transition:transform var(--t),border-color var(--t);
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--brand);}
.faq-acc .accordion-body{
  padding:2px 26px 24px;font-size:15px;line-height:1.8;color:var(--ink-1);
}

/* ---------- CTA ---------- */
.cta-band{position:relative;padding:88px 0;overflow:hidden;background:var(--bg-0);}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;opacity:.16;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(640px 320px at 80% 20%,rgba(31,211,192,.20),transparent 70%),
             linear-gradient(180deg,rgba(6,10,18,.6),rgba(6,10,18,.92));
}
.cta-card{
  position:relative;z-index:2;text-align:center;
  background:var(--glass-strong);border:1px solid var(--line-brand);border-radius:24px;
  padding:56px 40px;backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-3);
}
.cta-card h2{font-size:30px;margin:16px 0 14px;}
.cta-card p{font-size:16px;color:var(--ink-1);max-width:640px;margin:0 auto;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--bg-0);padding-top:1px;}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.45),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 40px;}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:16px;margin-bottom:16px;}
.foot-desc{font-size:14px;color:var(--ink-2);max-width:320px;line-height:1.8;}
.foot-col h4{font-size:15px;color:var(--ink-0);margin-bottom:18px;letter-spacing:.01em;}
.foot-col ul{display:grid;gap:11px;}
.foot-col a{font-size:14px;color:var(--ink-2);}
.foot-col a:hover{color:var(--brand);}
.foot-contact div{font-size:14px;color:var(--ink-2);margin-bottom:10px;}
.foot-contact .mono{color:var(--ink-1);}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0 30px;border-top:1px solid rgba(255,255,255,.07);
  font-size:13px;color:var(--ink-2);flex-wrap:wrap;
}
.to-top{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
}
.to-top:hover{color:var(--brand);border-color:var(--line-brand);background:var(--brand-soft);}

/* ---------- 响应式 ---------- */
@media(max-width:1199px){
  .hero-copy h1{font-size:40px;}
}
@media(max-width:991px){
  .nav-links{display:none;}
  .mobile-tab{display:grid;}
  body{padding-bottom:76px;}
  .site-header{background:rgba(6,10,18,.86);border-bottom-color:rgba(255,255,255,.08);}
  .hero-card{grid-template-columns:1fr;gap:32px;padding:32px;}
  .hero-copy h1{font-size:34px;}
  .hero-visual img{aspect-ratio:16/10;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:36px;}
  .section-head h2{font-size:26px;}
  .zz-row,.zz-row.reverse{grid-template-columns:1fr;gap:24px;margin-bottom:48px;}
  .zz-row.reverse .zz-media,.zz-row.reverse .zz-text{grid-column:1;grid-row:auto;}
  .steps{gap:14px;}
  .step{grid-template-columns:1fr;gap:12px;}
  .step-num{border-right:0;padding-top:0;font-size:20px;}
}
@media(max-width:767px){
  .wrap{padding:0 20px;}
  .brand{font-size:15px;}
  .hero-copy h1{font-size:30px;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn-brand,.hero-actions .btn-outline-brand{flex:1 1 auto;}
  .prep-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 28px;}
  .foot-brand{font-size:15px;}
  .cta-card{padding:36px 22px;}
  .cta-card h2{font-size:24px;}
  .cta-actions .btn-accent,.cta-actions .btn-ghost{width:100%;}
  .step{padding:22px;}
  .faq-acc .accordion-button{font-size:16px;padding:17px 18px 17px 22px;}
  .faq-acc .accordion-body{padding:0 20px 20px;font-size:14.5px;}
}
@media(max-width:519px){
  .foot-grid{grid-template-columns:1fr;}
  .hero-card{padding:24px;border-radius:18px;}
  .hero-copy h1{font-size:27px;}
}

/* roulang page: category3 */
:root{
  --bg-0:#060A12;
  --bg-1:#0A111F;
  --bg-2:#101A2C;
  --brand:#1FD3C0;
  --brand-deep:#12B3A4;
  --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB;
  --ink-1:#B9C6D8;
  --ink-2:#7E8EA6;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.075);
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.06);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 10px 30px rgba(0,0,0,.45);
  --sh-3:0 18px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(31,211,192,.25),0 8px 30px rgba(31,211,192,.16);
  --glow-strong:0 0 0 1px rgba(255,180,84,.32),0 14px 40px rgba(255,180,84,.26);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --cn:"HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-1);
  color:var(--ink-0);
  font-family:var(--cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .22s ease}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
::selection{background:rgba(31,211,192,.3);color:#fff}
.mono{font-family:var(--mono);letter-spacing:.02em}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:rgba(6,10,18,.55);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.scrolled{background:rgba(6,10,18,.86);border-bottom-color:var(--line)}
.nav-bar{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:.2px;color:var(--ink-0);white-space:nowrap}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04161A;font-weight:800;font-size:15px;
  box-shadow:0 6px 18px rgba(31,211,192,.28);
}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;font-size:14.5px;color:var(--ink-1);padding:6px 0;letter-spacing:.02em}
.nav-links a:hover{color:var(--ink-0)}
.nav-links a.active{color:var(--ink-0);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 10px rgba(31,211,192,.65);
}

/* ============ hero ============ */
.hero{position:relative;padding:132px 0 84px;overflow:hidden;background:var(--bg-1)}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.3;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(880px 420px at 12% 8%,rgba(31,211,192,.20),transparent 62%),
    radial-gradient(700px 380px at 92% 82%,rgba(124,140,255,.14),transparent 66%),
    linear-gradient(180deg,rgba(6,10,18,.90),rgba(10,17,31,.97));
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero-panel{
  background:var(--glass);border:1px solid var(--line);border-radius:24px;
  padding:40px;backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-2);
}
.pill{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  background:var(--brand-soft);border:1px solid rgba(31,211,192,.28);
  color:var(--brand);font-size:12px;font-family:var(--mono);letter-spacing:.03em;
}
.hero h1{
  font-size:clamp(30px,4.2vw,48px);line-height:1.15;font-weight:700;letter-spacing:-.5px;
  margin:22px 0 14px;
}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:17px;color:var(--ink-1);line-height:1.7}
.hero-desc{margin-top:16px;font-size:15px;color:var(--ink-2);line-height:1.85;max-width:640px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-img);border:1px solid var(--line);
  box-shadow:var(--sh-3);
}
.hero-visual .tag-float{
  position:absolute;left:-16px;bottom:24px;
  background:rgba(6,10,18,.86);border:1px solid rgba(31,211,192,.3);
  border-radius:14px;padding:14px 18px;box-shadow:var(--sh-2);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.tag-float .num{font-family:var(--mono);font-size:22px;color:var(--brand);line-height:1.1}
.tag-float .cap{font-size:12px;color:var(--ink-2);margin-top:4px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease,filter .22s ease;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn:active{transform:translateY(1px)}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#FF9A2E);color:#221606;
  box-shadow:var(--glow-strong);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(255,180,84,.42),0 18px 46px rgba(255,180,84,.34)}
.btn-brand{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#04161A;
  box-shadow:var(--glow);
}
.btn-brand:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(31,211,192,.4),0 16px 40px rgba(31,211,192,.28)}
.btn-outline{background:transparent;border-color:rgba(31,211,192,.45);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);transform:translateY(-2px);border-color:var(--brand)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-1)}
.btn-ghost:hover{border-color:rgba(255,255,255,.28);color:var(--ink-0);transform:translateY(-2px)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn:disabled,.btn.is-disabled{filter:saturate(.4);opacity:.5;cursor:not-allowed;transform:none}

/* ============ sections ============ */
.sec{position:relative;padding:88px 0}
.sec-alt{background:var(--bg-2)}
.sec-divider::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.35),transparent);
}
.sec-head{max-width:760px;margin-bottom:44px}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--brand);font-weight:600;
  text-transform:uppercase;
}
.sec-title{font-size:clamp(24px,3vw,32px);line-height:1.25;font-weight:700;margin:12px 0 12px;letter-spacing:-.3px}
.sec-sub{color:var(--ink-2);font-size:15px;line-height:1.85}

/* ============ spec table ============ */
.table-shell{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-2);
}
.table-scroll{overflow-x:auto}
.spec-table{width:100%;border-collapse:collapse;min-width:680px}
.spec-table thead th{
  background:rgba(255,255,255,.07);
  backdrop-filter:blur(10px);
  font-size:13px;letter-spacing:.08em;color:var(--ink-1);font-weight:600;
  padding:16px 22px;text-align:left;border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.spec-table tbody td{
  padding:16px 22px;font-size:15px;color:var(--ink-1);
  border-bottom:1px solid var(--line-soft);vertical-align:middle;
}
.spec-table tbody tr:last-child td{border-bottom:none}
.spec-table tbody tr:nth-child(even){background:rgba(255,255,255,.025)}
.spec-table tbody tr:hover{background:rgba(31,211,192,.055)}
.spec-table td.item{color:var(--ink-0);font-weight:600;font-size:14.5px}
.spec-table .val{font-family:var(--mono);color:var(--brand);font-size:14px}
.spec-table .val-dim{font-family:var(--mono);color:var(--ink-2);font-size:14px}
.table-note{
  display:flex;gap:10px;align-items:flex-start;
  margin-top:18px;font-size:13.5px;color:var(--ink-2);line-height:1.8;
}
.table-note i{color:var(--brand);margin-top:5px;font-size:13px}

/* ============ info cards ============ */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.info-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px;backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-1);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.info-card:hover{transform:translateY(-2px);border-color:rgba(31,211,192,.32);box-shadow:var(--sh-2),0 0 0 1px rgba(31,211,192,.18)}
.info-top{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.info-ico{
  width:44px;height:44px;flex:0 0 44px;border-radius:13px;display:grid;place-items:center;
  background:var(--brand-soft);border:1px solid rgba(31,211,192,.24);color:var(--brand);font-size:17px;
}
.info-card h3{font-size:20px;font-weight:600;line-height:1.4}
.info-card p{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-top:6px}
.info-list{margin-top:18px;border-top:1px dashed rgba(255,255,255,.12);padding-top:16px}
.info-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--ink-1);line-height:1.8;padding:6px 0;
}
.info-list li i{color:var(--brand);font-size:12px;margin-top:8px}
.info-list li .mono{color:var(--brand);font-size:13.5px}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.steps::before{
  content:"";position:absolute;top:23px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,rgba(31,211,192,.05),rgba(31,211,192,.45),rgba(31,211,192,.05));
}
.step{position:relative;text-align:center;padding-top:0}
.step .dot{
  width:46px;height:46px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;
  background:var(--bg-2);border:1px solid rgba(31,211,192,.35);
  color:var(--brand);font-family:var(--mono);font-size:16px;
  box-shadow:0 0 0 6px rgba(10,17,31,.9),0 8px 22px rgba(31,211,192,.16);
  position:relative;z-index:1;
}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step p{font-size:13.8px;color:var(--ink-2);line-height:1.8;padding:0 4px}

/* ============ feature split ============ */
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:center}
.split.rev{grid-template-columns:1.05fr .95fr}
.split-media{position:relative}
.split-media img{width:100%;border-radius:var(--r-img);border:1px solid var(--line);box-shadow:var(--sh-2)}
.split-body h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.3;margin-bottom:16px;letter-spacing:-.2px}
.split-body p{font-size:15px;color:var(--ink-1);line-height:1.9}
.split-body p+p{margin-top:14px}
.check-list{margin-top:24px;display:grid;gap:12px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--glass);border:1px solid var(--line);border-radius:14px;padding:14px 18px;
  font-size:14.2px;color:var(--ink-1);line-height:1.75;
  transition:border-color .22s ease,transform .22s ease;
}
.check-list li:hover{border-color:rgba(31,211,192,.3);transform:translateY(-2px)}
.check-list li i{color:var(--brand);font-size:14px;margin-top:5px}
.mini-badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;
  font-size:12px;font-family:var(--mono);
  background:rgba(124,140,255,.14);color:var(--violet);
}
.mini-badge.brand{background:var(--brand-soft);color:var(--brand)}

/* ============ faq ============ */
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:44px;align-items:start}
.faq-aside{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  position:sticky;top:96px;
}
.faq-aside h3{font-size:19px;font-weight:600;margin-bottom:12px}
.faq-aside p{font-size:14px;color:var(--ink-2);line-height:1.85}
.faq-aside .aside-links{margin-top:20px;border-top:1px dashed rgba(255,255,255,.12);padding-top:16px;display:grid;gap:10px}
.faq-aside .aside-links a{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-1);
  padding:10px 12px;border-radius:12px;border:1px solid transparent;
}
.faq-aside .aside-links a i{color:var(--brand);font-size:12px}
.faq-aside .aside-links a:hover{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--ink-0)}
.faq-acc .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:14px;
  margin-bottom:14px;overflow:hidden;
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:border-color .22s ease,background .22s ease;
}
.faq-acc .accordion-item:hover{border-color:rgba(255,255,255,.2)}
.faq-acc .accordion-button{
  background:transparent;color:var(--ink-0);font-size:16.5px;font-weight:600;
  padding:20px 22px;box-shadow:none;line-height:1.55;
  transition:background .22s ease,color .22s ease;
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--ink-0);background:rgba(31,211,192,.07);
  box-shadow:inset 3px 0 0 var(--brand);
}
.faq-acc .accordion-button:focus{box-shadow:inset 3px 0 0 var(--brand)}
.faq-acc .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq-acc .accordion-button::after{
  background-image:none;width:10px;height:10px;
  border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg);margin-top:-6px;
  transition:transform .25s ease,border-color .25s ease;
}
.faq-acc .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);border-color:var(--brand);margin-top:2px;
}
.faq-acc .accordion-body{padding:0 22px 22px;color:var(--ink-1);font-size:14.8px;line-height:1.9}

/* ============ cta ============ */
.cta-card{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(31,211,192,.10),rgba(124,140,255,.07));
  border:1px solid rgba(31,211,192,.24);border-radius:24px;
  padding:48px;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--sh-2);
}
.cta-card::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,211,192,.22),transparent 68%);
  pointer-events:none;
}
.cta-card h2{font-size:clamp(22px,2.8vw,30px);font-weight:700;line-height:1.3;margin-bottom:14px}
.cta-card p{font-size:15px;color:var(--ink-1);line-height:1.85;max-width:620px}
.cta-side{display:grid;gap:14px;position:relative;z-index:1}
.cta-meta{
  display:flex;justify-content:space-between;align-items:center;
  background:rgba(6,10,18,.5);border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;font-size:13.5px;color:var(--ink-2);
}
.cta-meta .mono{color:var(--brand);font-size:14px}

/* ============ footer ============ */
.site-footer{
  position:relative;background:var(--bg-0);padding:64px 0 0;margin-top:0;
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.4),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.35fr;gap:36px;padding-bottom:44px}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15.5px;color:var(--ink-0);margin-bottom:16px}
.foot-desc{font-size:13.8px;color:var(--ink-2);line-height:1.85;max-width:320px}
.foot-col h4{font-size:14px;font-weight:600;color:var(--ink-0);margin-bottom:16px;letter-spacing:.02em}
.foot-col ul{display:grid;gap:11px}
.foot-col ul a{font-size:13.8px;color:var(--ink-2)}
.foot-col ul a:hover{color:var(--brand)}
.foot-contact div{font-size:13.5px;color:var(--ink-2);line-height:2}
.foot-contact .mono{color:var(--ink-1)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  border-top:1px solid var(--line-soft);padding:22px 0 26px;
  font-size:13px;color:var(--ink-2);
}
.to-top{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
  transition:transform .22s ease,border-color .22s ease,color .22s ease;
}
.to-top:hover{transform:translateY(-2px);border-color:rgba(31,211,192,.4);color:var(--brand)}

/* ============ mobile tab ============ */
.mobile-tab{display:none}

/* ============ responsive ============ */
@media (max-width:1199px){
  .hero h1{font-size:clamp(28px,4.6vw,42px)}
}
@media (max-width:991px){
  .nav-links{display:none}
  .hero{padding:112px 0 64px}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-panel{padding:30px}
  .hero-visual .tag-float{left:12px;bottom:12px}
  .sec{padding:64px 0}
  .info-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr);gap:26px}
  .steps::before{display:none}
  .split,.split.rev{grid-template-columns:1fr;gap:28px}
  .split.rev .split-media{order:-1}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .faq-aside{position:static}
  .cta-card{grid-template-columns:1fr;padding:34px;gap:26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .mobile-tab{
    display:flex;position:fixed;bottom:0;left:0;right:0;z-index:1030;
    height:60px;padding-bottom:env(safe-area-inset-bottom,0);
    background:rgba(6,10,18,.94);
    backdrop-filter:blur(16px) saturate(140%);
    -webkit-backdrop-filter:blur(16px) saturate(140%);
    border-top:1px solid var(--line);
  }
  .mobile-tab a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:10px;color:var(--ink-2);position:relative;
  }
  .mobile-tab a i{font-size:17px}
  .mobile-tab a.active{color:var(--brand)}
  .mobile-tab a.active::before{
    content:"";position:absolute;top:0;width:28px;height:2px;border-radius:2px;
    background:var(--brand);box-shadow:0 0 10px rgba(31,211,192,.6);
  }
  body{padding-bottom:76px}
  .faq-aside{top:auto}
}
@media (max-width:576px){
  .wrap{padding:0 20px}
  .hero{padding:100px 0 52px}
  .hero-panel{padding:24px;border-radius:20px}
  .hero-sub{font-size:15.5px}
  .btn{padding:0 18px;font-size:14.5px}
  .btn-row{gap:10px}
  .sec{padding:56px 0}
  .info-card{padding:24px}
  .steps{grid-template-columns:1fr}
  .cta-card{padding:26px;border-radius:20px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .tag-float .num{font-size:18px}
  .spec-table thead th,.spec-table tbody td{padding:14px 16px}
}

/* roulang page: category5 */
:root{
  --bg-0:#060A12;
  --bg-1:#0A111F;
  --bg-2:#101A2C;
  --brand:#1FD3C0;
  --brand-deep:#12B3A4;
  --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB;
  --ink-1:#B9C6D8;
  --ink-2:#7E8EA6;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.10);
  --line-brand:rgba(31,211,192,.22);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow-s:0 2px 10px rgba(0,0,0,.35);
  --shadow-m:0 10px 30px rgba(0,0,0,.45);
  --shadow-h:0 18px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(31,211,192,.25),0 8px 30px rgba(31,211,192,.16);
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-1);
  color:var(--ink-1);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:#63EBDD}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-0);font-weight:700;letter-spacing:-.3px;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);letter-spacing:.01em;color:var(--brand);font-size:13.5px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,18,.74);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .22s ease,box-shadow .22s ease;
}
.site-header.is-scrolled{background:rgba(6,10,18,.9);box-shadow:0 8px 26px rgba(0,0,0,.4)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:16px;letter-spacing:-.2px;white-space:nowrap}
.brand:hover{color:var(--ink-0)}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),#0E8E84);
  display:grid;place-items:center;color:#04221F;font-weight:800;font-size:16px;
  box-shadow:var(--glow);
}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;color:var(--ink-1);font-size:14.5px;font-weight:500;padding:6px 0;white-space:nowrap}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--ink-0)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink-0);font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);padding:13px 24px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease,filter .22s ease;
}
.btn:active{transform:translateY(1px)}
.btn-amber{
  background:linear-gradient(135deg,#FFC06A,#F0952F);color:#1A1206;
  box-shadow:0 0 0 1px rgba(255,180,84,.4),0 10px 30px rgba(255,180,84,.22);
}
.btn-amber:hover{transform:translateY(-2px);filter:brightness(1.06);color:#1A1206;box-shadow:0 0 0 1px rgba(255,180,84,.55),0 16px 42px rgba(255,180,84,.3)}
.btn-brand{background:var(--brand);color:#04221F;box-shadow:var(--glow)}
.btn-brand:hover{transform:translateY(-2px);background:#2CDCCA;color:#04221F;filter:brightness(1.04)}
.btn-outline{background:transparent;border-color:var(--line-brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-1)}
.btn-ghost:hover{border-color:rgba(255,255,255,.3);color:var(--ink-0);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;padding:64px 0 76px;
  background:
    linear-gradient(180deg,rgba(6,10,18,.88) 0%,rgba(10,17,31,.93) 65%,var(--bg-1) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(720px 420px at 16% 12%,rgba(31,211,192,.18),transparent 68%),
             radial-gradient(560px 380px at 88% 84%,rgba(124,140,255,.12),transparent 70%);
}
.hero-inner{
  position:relative;z-index:2;
  border-radius:24px;border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  padding:44px 44px 46px;
  box-shadow:var(--shadow-m);
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border:1px solid var(--line-brand);
  border-radius:999px;padding:6px 14px;margin-bottom:20px;
}
.hero h1{font-size:46px;line-height:1.15;letter-spacing:-.6px;margin-bottom:16px}
.hero h1 .hl{color:var(--brand);display:block;font-size:26px;letter-spacing:0;margin-top:8px;font-weight:700}
.hero-sub{font-size:19px;color:var(--ink-0);font-weight:600;margin-bottom:14px;letter-spacing:-.2px}
.hero-text{font-size:15px;color:var(--ink-1);max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:20px}
.badge-mono{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12.5px;color:var(--ink-1);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  border-radius:999px;padding:7px 14px;
}
.badge-mono i{color:var(--accent);font-size:11px}
.hero-visual{position:relative}
.shot-frame{
  border-radius:22px;overflow:hidden;border:1px solid var(--line-brand);
  background:rgba(255,255,255,.04);
  box-shadow:var(--shadow-h),0 0 0 1px rgba(31,211,192,.14);
}
.shot-frame img{width:100%;aspect-ratio:4/3.1;object-fit:cover}
.hero-chip{
  position:absolute;left:-14px;bottom:-18px;
  display:flex;align-items:center;gap:10px;
  background:rgba(6,10,18,.9);border:1px solid var(--line-brand);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-m);
  backdrop-filter:blur(10px);
}
.hero-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(31,211,192,.18)}
.hero-chip span{font-size:13px;color:var(--ink-1)}
.hero-chip strong{display:block;color:var(--ink-0);font-size:13.5px;font-weight:600}

/* ---------- 通用板块 ---------- */
.sec{position:relative;padding:88px 0}
.sec::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.28),transparent);
}
.sec-alt{background:var(--bg-2)}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  color:var(--violet);background:rgba(124,140,255,.12);
  border:1px solid rgba(124,140,255,.25);border-radius:999px;padding:5px 13px;margin-bottom:16px;
}
.sec-head h2{font-size:32px;line-height:1.25;margin-bottom:14px}
.sec-head p{font-size:15.5px;color:var(--ink-1);max-width:700px}

.card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-s);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
  padding:26px;
}
.card:hover{border-color:var(--line-brand);transform:translateY(-2px);box-shadow:var(--shadow-m)}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.split-75{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:start}
.split-57{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:center}

/* ---------- 更新机制 ---------- */
.mech-list{margin-top:24px;display:grid;gap:14px}
.mech-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:14.8px;color:var(--ink-1);
  padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.07);
}
.mech-list li i{color:var(--brand);margin-top:5px;font-size:13px}
.stat-card{
  background:linear-gradient(160deg,rgba(31,211,192,.12),rgba(255,255,255,.03) 60%);
  border:1px solid var(--line-brand);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-m);
}
.stat-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px dashed rgba(255,255,255,.13)}
.stat-row:last-child{border-bottom:none;padding-bottom:0}
.stat-row span{font-size:13.5px;color:var(--ink-2)}
.stat-row b{font-family:var(--mono);font-size:19px;color:var(--brand);font-weight:600;letter-spacing:0}
.stat-row b.amber{color:var(--accent)}
.stat-note{margin-top:16px;font-size:13px;color:var(--ink-2)}

/* ---------- 版本记录表 ---------- */
.table-wrap{
  border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--glass);overflow-x:auto;box-shadow:var(--shadow-s);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
table.ver-table{width:100%;min-width:760px;border-collapse:collapse}
table.ver-table thead th{
  background:rgba(31,211,192,.09);color:var(--ink-0);
  font-size:13.5px;font-weight:600;text-align:left;
  padding:15px 20px;border-bottom:1px solid var(--line-brand);white-space:nowrap;
}
table.ver-table tbody td{
  padding:15px 20px;font-size:14px;color:var(--ink-1);
  border-bottom:1px solid rgba(255,255,255,.06);vertical-align:top;
}
table.ver-table tbody tr:nth-child(even){background:rgba(255,255,255,.025)}
table.ver-table tbody tr:last-child td{border-bottom:none}
table.ver-table tbody tr:hover{background:rgba(31,211,192,.06)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:3px 11px;
  border:1px solid rgba(31,211,192,.2);
}
.tag-violet{color:var(--violet);background:rgba(124,140,255,.12);border-color:rgba(124,140,255,.24)}
.tag-amber{color:var(--accent);background:rgba(255,180,84,.12);border-color:rgba(255,180,84,.26)}

/* ---------- 安全卡片 ---------- */
.safe-card h3{font-size:20px;margin-bottom:12px}
.safe-card p{font-size:14.5px;color:var(--ink-1)}
.safe-icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:var(--brand-soft);border:1px solid var(--line-brand);
  color:var(--brand);font-size:18px;margin-bottom:18px;
}
.safe-icon.violet{background:rgba(124,140,255,.12);border-color:rgba(124,140,255,.26);color:var(--violet)}
.safe-icon.amber{background:rgba(255,180,84,.12);border-color:rgba(255,180,84,.26);color:var(--accent)}

/* ---------- 图文自查 ---------- */
.figure-block{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-m);background:rgba(255,255,255,.04)}
.figure-block img{width:100%;aspect-ratio:4/3;object-fit:cover}
.check-list{display:grid;gap:14px}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 18px;border-radius:14px;
  background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.07);
  transition:border-color .22s ease,transform .22s ease;
}
.check-list li:hover{border-color:var(--line-brand);transform:translateY(-2px)}
.check-index{
  flex:0 0 30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:rgba(31,211,192,.14);color:var(--brand);
  font-family:var(--mono);font-size:13px;font-weight:600;
}
.check-list li strong{display:block;color:var(--ink-0);font-size:15px;font-weight:600;margin-bottom:4px}
.check-list li p{font-size:13.8px;color:var(--ink-2);line-height:1.7}

/* ---------- FAQ ---------- */
.faq-accordion .accordion-item{
  background:var(--glass);border:1px solid var(--line);
  border-radius:14px;margin-bottom:12px;overflow:hidden;
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.faq-accordion .accordion-item:last-child{margin-bottom:0}
.faq-accordion .accordion-button{
  background:transparent;color:var(--ink-0);font-size:17px;font-weight:600;
  padding:18px 22px;box-shadow:none;border-radius:14px;letter-spacing:-.2px;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--ink-0);background:rgba(31,211,192,.06);
  border-left:3px solid var(--brand);
}
.faq-accordion .accordion-button:focus{box-shadow:none;border-color:transparent}
.faq-accordion .accordion-button::after{
  background-image:none;content:"\f078";
  font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  color:var(--brand);width:auto;height:auto;display:grid;place-items:center;
  transform:none;transition:transform .22s ease;margin-left:16px;
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.faq-accordion .accordion-body{
  color:var(--ink-1);font-size:15px;line-height:1.8;padding:2px 22px 22px;
  border-left:3px solid rgba(31,211,192,.25);
}

/* ---------- 表单 ---------- */
.form-panel{padding:32px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;font-weight:500}
.field input,.field select,.field textarea{
  width:100%;background:rgba(255,255,255,.045);
  border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;color:var(--ink-0);font-size:14.5px;font-family:inherit;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.field textarea{min-height:118px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(126,142,166,.75)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:rgba(255,255,255,.06);
  box-shadow:0 0 0 3px rgba(31,211,192,.16);
}
.field select option{background:#0A111F;color:var(--ink-0)}
.form-tip{font-size:12.5px;color:var(--ink-2);margin-top:14px}
.contact-card dl{margin:0}
.contact-card dt{font-size:13px;color:var(--ink-2);margin-top:16px}
.contact-card dd{margin:4px 0 0;font-size:15px;color:var(--ink-0);font-weight:600}
.contact-card dd.mono{font-weight:600}
.contact-card dd:first-of-type{margin-top:0}

/* ---------- CTA ---------- */
.cta{
  position:relative;overflow:hidden;border-radius:24px;
  border:1px solid var(--line-brand);
  background:
    linear-gradient(120deg,rgba(6,10,18,.92),rgba(10,17,31,.86)),
    url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  padding:52px 44px;box-shadow:var(--shadow-h);
}
.cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(520px 300px at 82% 20%,rgba(31,211,192,.22),transparent 70%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center}
.cta h2{font-size:30px;margin-bottom:14px}
.cta p{font-size:15px;color:var(--ink-1);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-note{margin-top:16px;font-size:12.5px;color:var(--ink-2);font-family:var(--mono)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;background:var(--bg-0);
  border-top:1px solid var(--line);padding:64px 0 28px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.5),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:16px;margin-bottom:16px}
.foot-desc{font-size:13.5px;color:var(--ink-2);line-height:1.8;max-width:320px}
.foot-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;font-weight:600;letter-spacing:0}
.foot-col ul{display:grid;gap:12px}
.foot-col ul a{font-size:13.5px;color:var(--ink-2)}
.foot-col ul a:hover{color:var(--brand)}
.foot-contact div{font-size:13.5px;color:var(--ink-2);margin-bottom:10px}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--ink-2);
}
.to-top{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--ink-1);background:rgba(255,255,255,.03);
  transition:border-color .22s ease,color .22s ease,transform .22s ease;
}
.to-top:hover{border-color:var(--line-brand);color:var(--brand);transform:translateY(-2px)}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  height:60px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(6,10,18,.94);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-top:1px solid var(--line);
}
.mobile-tab ul{display:flex;height:60px}
.mobile-tab li{flex:1}
.mobile-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:100%;font-size:10px;color:var(--ink-2);
}
.mobile-tab a i{font-size:16px}
.mobile-tab a.active{color:var(--brand)}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--brand);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero h1{font-size:40px}
  .hero h1 .hl{font-size:23px}
}
@media (max-width:991px){
  .sec{padding:72px 0}
  .hero{padding:48px 0 60px}
  .hero-inner{padding:34px 30px 36px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{max-width:560px}
  .split-75,.split-57{grid-template-columns:1fr;gap:30px}
  .cta-inner{grid-template-columns:1fr}
  .cta-actions{justify-content:flex-start}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .mobile-tab{display:block}
  body{padding-bottom:76px}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .sec{padding:60px 0}
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:26px}
  .hero h1{font-size:31px;letter-spacing:-.4px}
  .hero h1 .hl{font-size:20px}
  .hero-sub{font-size:17px}
  .hero-inner{padding:26px 22px 30px;border-radius:20px}
  .grid-2{grid-template-columns:1fr}
  .btn{padding:12px 20px;font-size:14.5px}
  .btn-sm{padding:10px 16px;font-size:13.5px}
  .card{padding:22px}
  .form-panel{padding:24px}
  .cta{padding:36px 24px;border-radius:20px}
  .cta h2{font-size:24px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:14px}
  .hero-chip{left:0;bottom:-16px}
  .faq-accordion .accordion-button{font-size:15.5px;padding:16px 18px}
  .faq-accordion .accordion-body{padding:2px 18px 18px;font-size:14.5px}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .stat-row b{font-size:17px}
}

/* roulang page: category4 */
:root{
  --bg-0:#060A12;
  --bg-1:#0A111F;
  --bg-2:#101A2C;
  --brand:#1FD3C0;
  --brand-deep:#12B3A4;
  --brand-soft:rgba(31,211,192,.12);
  --accent:#FFB454;
  --violet:#7C8CFF;
  --ink-0:#F2F6FB;
  --ink-1:#B9C6D8;
  --ink-2:#7E8EA6;
  --glass:rgba(255,255,255,.055);
  --glass-line:rgba(255,255,255,.10);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 10px 30px rgba(0,0,0,.45);
  --sh-3:0 18px 44px rgba(0,0,0,.55);
  --ease:.22s ease;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  background:var(--bg-1);
  color:var(--ink-1);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
h1,h2,h3,h4{margin:0;color:var(--ink-0);font-weight:700;letter-spacing:-.2px}
p{margin:0}
.mono{font-family:"JetBrains Mono","SFMono-Regular",Consolas,Menlo,monospace;letter-spacing:.02em}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.wrap{max-width:1280px}}
@media (max-width:575px){.wrap{padding:0 20px}}

.glass{
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:var(--r-card);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background var(--ease),box-shadow var(--ease);
}
.site-header.scrolled{background:rgba(6,10,18,.9);box-shadow:0 10px 30px rgba(0,0,0,.45)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-0)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04121A;font-weight:800;font-size:17px;
  box-shadow:0 0 0 1px rgba(31,211,192,.25),0 8px 20px rgba(31,211,192,.22);
}
.brand-text{font-size:16px;font-weight:700;white-space:nowrap;letter-spacing:.2px}
.brand-sub{font-size:12px;color:var(--brand);margin-left:6px;font-weight:600;letter-spacing:0}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:68px;
  color:var(--ink-1);font-size:15px;transition:color var(--ease);
}
.nav-links a:hover{color:var(--ink-0)}
.nav-links a.active{color:var(--ink-0);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px rgba(31,211,192,.65);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  background:transparent;border:1px solid rgba(255,255,255,.14);color:var(--ink-1);
  cursor:pointer;transition:border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:rgba(31,211,192,.45);color:var(--brand)}
.mobile-drawer{display:none;border-top:1px solid rgba(255,255,255,.07);background:rgba(6,10,18,.97)}
.mobile-drawer.open{display:block}
.mobile-drawer ul{list-style:none;margin:0;padding:10px 24px 18px}
.mobile-drawer li a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 4px;color:var(--ink-1);font-size:15px;border-bottom:1px solid rgba(255,255,255,.05);
}
.mobile-drawer li:last-child a{border-bottom:0}
.mobile-drawer li a.active{color:var(--brand);font-weight:600}

@media (max-width:991px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .header-actions .btn-header{display:none}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);padding:12px 22px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn i{font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#04121A;
  box-shadow:0 0 0 1px rgba(31,211,192,.25),0 8px 30px rgba(31,211,192,.20);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(31,211,192,.35),0 14px 36px rgba(31,211,192,.30);color:#04121A}
.btn-accent{
  background:linear-gradient(135deg,#FFCB80,var(--accent));color:#2A1704;
  box-shadow:0 0 0 1px rgba(255,180,84,.28),0 10px 30px rgba(255,180,84,.24);
}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,180,84,.4),0 16px 38px rgba(255,180,84,.34);color:#2A1704}
.btn-outline{background:transparent;border-color:rgba(31,211,192,.45);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);transform:translateY(-2px);color:var(--brand)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.16);color:var(--ink-1)}
.btn-ghost:hover{border-color:rgba(255,255,255,.32);color:var(--ink-0);transform:translateY(-2px)}
.btn:active{transform:translateY(1px);box-shadow:none}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- Chips / badges ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.06em;color:var(--brand);
  background:var(--brand-soft);border:1px solid rgba(31,211,192,.22);
  border-radius:999px;padding:5px 13px;margin-bottom:16px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 11px;border-radius:999px;
  background:rgba(124,140,255,.14);color:#AEB8FF;border:1px solid rgba(124,140,255,.24);
  white-space:nowrap;
}
.chip-brand{background:var(--brand-soft);color:var(--brand);border-color:rgba(31,211,192,.24)}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 84px;
  background:
    linear-gradient(180deg,rgba(6,10,18,.9) 0%,rgba(10,17,31,.96) 100%),
    url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.page-hero::after{
  content:"";position:absolute;left:-12%;right:-12%;bottom:-46%;height:380px;
  background:radial-gradient(closest-side,rgba(31,211,192,.18),transparent 72%);
  pointer-events:none;
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:26px}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{opacity:.6}
.crumbs .now{color:var(--ink-1)}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center}
.hero-copy h1{font-size:46px;line-height:1.15;font-weight:700;letter-spacing:-.5px;margin-bottom:18px}
.hero-copy h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:17px;color:var(--ink-1);margin-bottom:14px;max-width:620px}
.hero-para{font-size:15px;color:var(--ink-2);max-width:660px;margin-bottom:28px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-media{position:relative;padding:14px;border-radius:24px;box-shadow:var(--sh-2)}
.hero-media img{width:100%;height:300px;object-fit:cover;border-radius:16px}
.hero-media-badge{
  position:absolute;left:26px;bottom:26px;display:flex;align-items:center;gap:10px;
  background:rgba(6,10,18,.82);border:1px solid rgba(31,211,192,.28);
  border-radius:999px;padding:7px 16px;font-size:12.5px;color:var(--ink-1);
}
.hero-media-badge .mono{color:var(--brand);font-weight:600}

@media (max-width:1199px){
  .hero-copy h1{font-size:40px}
}
@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media img{height:260px}
}
@media (max-width:575px){
  .page-hero{padding:36px 0 60px}
  .hero-copy h1{font-size:30px}
  .hero-sub{font-size:15.5px}
  .hero-media img{height:220px}
}

/* ---------- Sections ---------- */
.section{padding:92px 0;position:relative}
.section.alt{background:var(--bg-2)}
.section-line{height:1px;background:linear-gradient(90deg,transparent,rgba(31,211,192,.25),transparent)}
@media (max-width:767px){.section{padding:60px 0}}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-title{font-size:32px;line-height:1.25;margin-bottom:12px}
.sec-desc{font-size:15px;color:var(--ink-2)}
@media (max-width:575px){.sec-title{font-size:24px}.sec-head{margin-bottom:32px}}

/* ---------- Quick check cards ---------- */
.quick-card{padding:30px;border-radius:20px;height:100%;transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease)}
.quick-card:hover{border-color:rgba(31,211,192,.3);transform:translateY(-3px);box-shadow:var(--sh-2)}
.quick-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.quick-card .lead{font-size:14px;color:var(--ink-2);margin-bottom:20px}
.check-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:16px}
.check-list li{display:flex;gap:14px;align-items:flex-start}
.check-num{
  flex:0 0 auto;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:var(--brand-soft);border:1px solid rgba(31,211,192,.24);
  color:var(--brand);font-size:13.5px;font-weight:700;
  font-family:"JetBrains Mono",Consolas,monospace;
}
.check-list b{display:block;color:var(--ink-0);font-size:15px;font-weight:600;margin-bottom:3px}
.check-list span{font-size:14px;color:var(--ink-2);line-height:1.7}
.mini-spec{border-top:1px dashed rgba(255,255,255,.12);margin-top:22px;padding-top:18px;display:flex;flex-direction:column;gap:10px}
.mini-spec div{display:flex;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--ink-2)}
.mini-spec .mono{color:var(--brand)}
.side-cta{margin-top:24px;display:flex;flex-direction:column;gap:12px}

/* ---------- Anchor + FAQ ---------- */
.anchor-card{position:sticky;top:96px;padding:24px;border-radius:20px}
.anchor-title{font-size:12.5px;letter-spacing:.08em;color:var(--ink-2);font-weight:600;margin-bottom:14px}
.anchor-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.anchor-list a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:11px 14px;border-radius:12px;color:var(--ink-1);font-size:14.5px;
  transition:background var(--ease),color var(--ease),transform var(--ease);
}
.anchor-list a:hover{background:rgba(31,211,192,.10);color:var(--ink-0);transform:translateX(3px)}
.anchor-list a i{font-size:11px;color:var(--ink-2);transition:color var(--ease)}
.anchor-list a:hover i{color:var(--brand)}
.anchor-foot{margin-top:20px;padding-top:18px;border-top:1px dashed rgba(255,255,255,.12)}
.anchor-foot p{font-size:13px;color:var(--ink-2);margin-bottom:12px}

.faq-group{scroll-margin-top:100px}
.faq-group + .faq-group{margin-top:46px}
.group-title{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:600;line-height:1.4;margin-bottom:18px}
.group-title i{color:var(--brand);font-size:17px}
@media (max-width:575px){.group-title{font-size:19px}}

.accordion-item.acc-item{
  background:var(--glass);border:1px solid var(--glass-line);border-radius:18px;
  overflow:hidden;margin-bottom:14px;
  backdrop-filter:blur(16px) saturate(140%);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.accordion-item.acc-item:hover{border-color:rgba(31,211,192,.28)}
.accordion-item.acc-item:has(.accordion-button:not(.collapsed)){
  border-color:rgba(31,211,192,.42);
  box-shadow:0 0 0 1px rgba(31,211,192,.14),0 12px 34px rgba(0,0,0,.42);
}
.acc-item .accordion-header{margin:0}
.acc-item .accordion-button{
  position:relative;width:100%;background:transparent;border:0;
  color:var(--ink-0);font-size:17px;font-weight:600;line-height:1.5;
  padding:20px 60px 20px 24px;border-radius:18px;box-shadow:none;
}
.acc-item .accordion-button::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--brand);opacity:0;transition:opacity var(--ease);
}
.acc-item .accordion-button:not(.collapsed){color:var(--brand);background:rgba(31,211,192,.065)}
.acc-item .accordion-button:not(.collapsed)::before{opacity:1}
.acc-item .accordion-button:focus{box-shadow:none;outline:2px solid rgba(31,211,192,.55);outline-offset:-2px}
.acc-item .accordion-button::after{
  content:"";position:absolute;right:26px;top:50%;margin:0;
  width:10px;height:10px;background-image:none;
  border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg) translate(-2px,-2px);
  transition:transform var(--ease),border-color var(--ease);
}
.acc-item .accordion-button:not(.collapsed)::after{
  border-color:var(--brand);transform:rotate(-135deg) translate(-2px,-2px);
}
.acc-body{padding:0 24px 22px}
.acc-body p{font-size:15px;color:var(--ink-1);line-height:1.85;margin-bottom:10px}
.acc-body p:last-child{margin-bottom:0}
.acc-body ul{margin:0 0 10px;padding-left:18px}
.acc-body li{font-size:15px;color:var(--ink-1);line-height:1.8;margin-bottom:6px}
.acc-body code{
  font-family:"JetBrains Mono",Consolas,monospace;font-size:13.5px;
  background:rgba(31,211,192,.12);color:var(--brand);padding:2px 7px;border-radius:6px;
}
.acc-tip{
  margin-top:12px;padding:12px 16px;border-left:3px solid rgba(31,211,192,.7);
  background:rgba(31,211,192,.07);border-radius:0 12px 12px 0;
  font-size:14px;color:var(--ink-1);
}
@media (max-width:575px){
  .acc-item .accordion-button{font-size:15.5px;padding:17px 52px 17px 18px}
  .acc-body{padding:0 18px 18px}
}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:991px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575px){.steps{grid-template-columns:1fr}}
.step{
  position:relative;padding:26px 22px;border-radius:18px;
  background:var(--glass);border:1px solid var(--glass-line);
  backdrop-filter:blur(16px) saturate(140%);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.step:hover{transform:translateY(-3px);border-color:rgba(31,211,192,.34);box-shadow:var(--sh-2)}
.step-num{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:rgba(31,211,192,.14);border:1px solid rgba(31,211,192,.22);
  color:var(--brand);font-weight:700;font-size:14px;margin-bottom:14px;
  font-family:"JetBrains Mono",Consolas,monospace;
}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-2);line-height:1.7}

/* ---------- Form ---------- */
.fb-panel{padding:34px;border-radius:20px}
@media (max-width:575px){.fb-panel{padding:24px 20px}}
.form-label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px}
.glass-input{
  width:100%;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:12px;color:var(--ink-0);padding:12px 14px;font-size:15px;line-height:1.6;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
  font-family:inherit;
}
.glass-input::placeholder{color:#5F6E85}
.glass-input:focus{
  background-color:rgba(255,255,255,.075) !important;color:var(--ink-0) !important;
  border-color:rgba(31,211,192,.65) !important;
  box-shadow:0 0 0 3px rgba(31,211,192,.14) !important;outline:none;
}
textarea.glass-input{resize:vertical;min-height:112px}
.form-hint{font-size:12.5px;color:var(--ink-2)}
.fb-side{padding:30px;border-radius:20px;height:100%}
.fb-side h3{font-size:19px;font-weight:600;margin-bottom:10px}
.fb-side p{font-size:14px;color:var(--ink-2);margin-bottom:18px}
.fb-side ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.fb-side li{display:flex;gap:10px;font-size:14px;color:var(--ink-1);line-height:1.7}
.fb-side li i{color:var(--brand);font-size:13px;margin-top:5px}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--bg-0);border-top:1px solid rgba(255,255,255,.06);
  padding:64px 0 26px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,211,192,.35),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;font-size:15.5px;margin-bottom:14px}
.foot-desc{font-size:13.5px;color:var(--ink-2);line-height:1.8;max-width:320px}
.foot-col h4{font-size:14px;color:var(--ink-0);font-weight:600;margin-bottom:16px}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.foot-col ul a{font-size:13.5px;color:var(--ink-2);transition:color var(--ease)}
.foot-col ul a:hover{color:var(--brand)}
.foot-contact div{font-size:13.5px;color:var(--ink-2);margin-bottom:9px}
.foot-contact .mono{color:var(--brand)}
.foot-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.06);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-2);
}
.to-top{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.14);color:var(--ink-1);
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.to-top:hover{border-color:rgba(31,211,192,.5);color:var(--brand);transform:translateY(-2px)}
@media (max-width:991px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:575px){.foot-grid{grid-template-columns:1fr;gap:26px}.site-footer{padding:48px 0 22px}}

/* ---------- Mobile tab bar ---------- */
.mobile-tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;display:none;
  grid-template-columns:repeat(5,1fr);
  background:rgba(6,10,18,.94);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-top:1px solid rgba(255,255,255,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabbar a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:60px;font-size:10px;color:var(--ink-2);transition:color var(--ease);
}
.mobile-tabbar a i{font-size:17px}
.mobile-tabbar a:hover{color:var(--ink-1)}
.mobile-tabbar a.active{color:var(--brand)}
.mobile-tabbar a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:24px;height:2px;border-radius:0 0 2px 2px;background:var(--brand);
  box-shadow:0 0 10px rgba(31,211,192,.7);
}
@media (max-width:767px){
  .mobile-tabbar{display:grid}
  body{padding-bottom:76px}
}