/* roulang page: index */
:root{
  --bg-0:#07100F;
  --bg-1:#0B1A1B;
  --bg-2:#0F2426;
  --brand:#14D6A0;
  --brand-deep:#0BA37B;
  --brand-soft:#7CF0CE;
  --accent-purple:#7B5CFF;
  --accent-amber:#FF8A3D;
  --text:#E9F5F2;
  --text-2:#A6C4BE;
  --text-3:#6E8C87;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.06);
  --r-card:18px;
  --r-img:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:999px;
  --r-tag:6px;
  --shadow-1:0 2px 10px rgba(0,0,0,.28);
  --shadow-2:0 8px 28px rgba(0,0,0,.42);
  --glow:inset 0 0 0 1px rgba(255,255,255,.14), 0 10px 30px -8px rgba(20,214,160,.55);
  --grad:linear-gradient(135deg,#14D6A0 0%,#7B5CFF 100%);
  --sec-y:96px;
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-soft);text-decoration:none;transition:color .2s ease,transform .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0 0 14px;color:var(--text);font-weight:700;letter-spacing:.2px;}
h1{font-size:clamp(30px,4.6vw,54px);line-height:1.18;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.3;}
h3{font-size:21px;line-height:1.45;font-weight:600;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
p{margin:0 0 16px;color:var(--text-2);}
ul,ol{margin:0 0 16px;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:16px;color:var(--text);}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:3px solid rgba(20,214,160,.45);outline-offset:2px;}
::selection{background:rgba(20,214,160,.28);color:#fff;}

.site-container{max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px;}
.grid-container{max-width:1240px;padding-left:24px;padding-right:24px;}
.section{padding:var(--sec-y) 0;position:relative;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);}
.section-head{margin-bottom:44px;max-width:760px;}
.section-head p{margin:0;font-size:16px;color:var(--text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;line-height:1.4;letter-spacing:1.4px;
  color:var(--brand-soft);
  background:rgba(20,214,160,.10);
  border:1px solid rgba(20,214,160,.22);
  border-radius:var(--r-badge);
  padding:6px 14px;
  margin-bottom:18px;
}
.eyebrow i{font-size:12px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad);
  color:#04120E;
  box-shadow:var(--glow);
}
.btn-primary:hover{color:#04120E;transform:translateY(-2px);filter:brightness(1.06);box-shadow:inset 0 0 0 1px rgba(255,255,255,.2),0 14px 34px -8px rgba(20,214,160,.65);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{
  background:var(--glass);
  border:1px solid var(--line);
  color:var(--text);
}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.1);transform:translateY(-2px);}
.btn-outline{
  background:transparent;border:1px solid rgba(20,214,160,.55);color:var(--brand);
}
.btn-outline:hover{color:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);background:rgba(20,214,160,.08);}
.btn-block{width:100%;}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-badge);
  font-size:13px;line-height:1.4;font-weight:500;
  background:rgba(20,214,160,.12);color:var(--brand-soft);
  border:1px solid rgba(20,214,160,.2);
}
.badge-purple{background:rgba(123,92,255,.14);color:#C3B4FF;border-color:rgba(123,92,255,.26);}
.badge-amber{background:rgba(255,138,61,.14);color:#FFC197;border-color:rgba(255,138,61,.26);}

/* 头部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:78px;
  display:flex;align-items:center;
  background:transparent;
  transition:height .28s ease,background .28s ease,border-color .28s ease,backdrop-filter .28s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-compact{
  height:64px;
  background:rgba(9,22,22,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 26px rgba(0,0,0,.35);
}
.header-inner{
  width:100%;max-width:1240px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;}
.brand:hover{color:var(--brand-soft);}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,214,160,.1);
  border:1px solid rgba(20,214,160,.28);
  box-shadow:0 6px 18px -8px rgba(20,214,160,.6);
}
.brand-text{font-size:17px;letter-spacing:.4px;line-height:1.2;}
.main-nav{display:flex;align-items:center;gap:26px;}
.main-nav ul{display:flex;align-items:center;gap:24px;margin:0;padding:0;}
.main-nav ul li a{
  position:relative;
  display:inline-flex;align-items:center;
  height:44px;font-size:15px;color:var(--text-2);
  transition:color .2s ease,transform .2s ease;
}
.main-nav ul li a:hover{color:var(--text);transform:translateY(-1px);}
.main-nav ul li a::after{
  content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;
  background:var(--brand);border-radius:2px;transform:translateX(-50%);
  transition:width .24s ease;
}
.main-nav ul li a.is-active{color:var(--text);}
.main-nav ul li a.is-active::after{width:20px;}
.nav-cta{padding:0 20px;min-height:42px;font-size:14px;}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* Hero */
.hero{
  position:relative;
  padding:150px 0 96px;
  min-height:78vh;
  display:flex;align-items:center;
  overflow:hidden;
  background-image:linear-gradient(105deg,rgba(7,16,15,.94) 0%,rgba(7,16,15,.76) 48%,rgba(7,16,15,.42) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center right;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:160px;
  background:linear-gradient(180deg,rgba(7,16,15,0) 0%,var(--bg-0) 100%);
  pointer-events:none;
}
.hero-grid{position:relative;z-index:2;align-items:center;}
.hero-copy h1{margin-bottom:20px;}
.hero-copy h1 .hl{
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  font-size:17px;line-height:1.85;color:var(--text-2);
  max-width:560px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px;color:var(--text-3);font-size:14px;}
.hero-trust span{display:inline-flex;align-items:center;gap:7px;}
.hero-trust i{color:var(--brand);font-size:12px;}
.hero-visual{position:relative;padding:10px 0 10px 20px;}
.hero-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-top:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(14px);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--shadow-1);
  animation:floaty 6s ease-in-out infinite;
}
.hero-panel + .hero-panel{margin-top:18px;animation-delay:1.4s;}
.hero-panel h4{margin-bottom:8px;font-size:17px;}
.hero-panel p{font-size:14px;line-height:1.7;margin-bottom:14px;color:var(--text-2);}
.hero-panel .metric-num{
  font-family:var(--font-num);
  font-size:32px;font-weight:700;line-height:1.1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-panel .metric-label{font-size:13px;color:var(--text-3);margin:6px 0 0;}
@keyframes floaty{0%,100%{transform:translateY(0);}50%{transform:translateY(-10px);}}

/* 服务卡 */
.cap-card{
  position:relative;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 28px 26px 32px;
  height:100%;
  box-shadow:var(--shadow-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.cap-card::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--accent-purple) 100%);
}
.cap-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(20,214,160,.28);}
.cap-icon{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,214,160,.1);
  border:1px solid rgba(20,214,160,.24);
  margin-bottom:16px;
}
.cap-icon svg{width:24px;height:24px;stroke:var(--brand);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.cap-card h3{margin-bottom:10px;}
.cap-card p{font-size:15px;line-height:1.75;margin-bottom:14px;}
.cap-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.cap-more i{transition:transform .2s ease;}
.cap-card:hover .cap-more i{transform:translateX(4px);}

/* 数据条 */
.stat-bar{
  background:var(--glass);
  border:1px solid var(--line);
  border-top:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(14px);
  border-radius:var(--r-card);
  padding:34px 28px;
  box-shadow:var(--shadow-1);
}
.stat-item{text-align:center;padding:6px 10px;}
.stat-num{
  font-family:var(--font-num);
  font-size:clamp(30px,3.4vw,42px);font-weight:700;line-height:1.1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-unit{font-size:15px;font-weight:600;color:var(--brand-soft);margin-left:4px;}
.stat-text{font-size:13px;color:var(--text-3);margin:8px 0 0;line-height:1.5;}

/* 场景卡 */
.scene-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;height:100%;box-shadow:var(--shadow-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(20,214,160,.28);}
.scene-media{position:relative;overflow:hidden;background:var(--bg-2);}
.scene-media img{width:100%;height:100%;object-fit:cover;border-bottom:1px solid var(--line-2);transition:transform .45s ease;}
.scene-card:hover .scene-media img{transform:scale(1.04);}
.scene-body{padding:24px 26px 26px;}
.scene-body h3{margin:14px 0 10px;font-size:19px;}
.scene-body p{font-size:15px;line-height:1.75;margin-bottom:12px;}
.scene-meta{font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.scene-title-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;}
.scene-card:hover .scene-title-link i{transform:translateX(4px);}
.scene-title-link i{transition:transform .2s ease;}
.link-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 18px;border-radius:14px;background:var(--bg-2);
  border:1px solid var(--line);transition:border-color .2s ease,transform .2s ease;
}
.link-row:hover{border-color:rgba(20,214,160,.3);transform:translateX(2px);}
.link-row .lr-title{font-size:15px;font-weight:600;color:var(--text);display:block;margin-bottom:4px;}
.link-row .lr-meta{font-size:13px;color:var(--text-3);}
.link-row i{color:var(--brand);transition:transform .2s ease;}
.link-row:hover i{transform:translateX(4px);}

/* 方案时间轴 */
.plan-side{position:sticky;top:110px;}
.plan-nav a{
  display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:12px;font-size:15px;color:var(--text-2);
  border:1px solid transparent;transition:all .2s ease;
}
.plan-nav a span.num{font-family:var(--font-num);font-size:13px;color:var(--brand);}
.plan-nav a:hover{background:var(--glass);color:var(--text);border-color:var(--line);}
.plan-list{position:relative;padding-left:34px;}
.plan-list::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--accent-purple) 100%);
  border-radius:2px;opacity:.55;
}
.plan-item{position:relative;margin-bottom:36px;}
.plan-item:last-child{margin-bottom:0;}
.plan-item::before{
  content:"";position:absolute;left:-34px;top:8px;width:20px;height:20px;border-radius:50%;
  background:var(--bg-1);border:2px solid var(--brand);
  box-shadow:0 0 0 5px rgba(20,214,160,.10);
}
.plan-item .plan-no{
  font-family:var(--font-num);font-size:13px;letter-spacing:1.6px;color:var(--brand-soft);
  display:block;margin-bottom:8px;
}
.plan-item h3{margin-bottom:10px;}
.point-list{margin:12px 0 0;}
.point-list li{
  position:relative;padding-left:20px;margin-bottom:9px;
  font-size:15px;line-height:1.75;color:var(--text-2);
}
.point-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 3px rgba(20,214,160,.12);
}

/* 最新信息 */
.news-feature{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;height:100%;box-shadow:var(--shadow-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.news-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(20,214,160,.3);}
.news-feature .nf-media{overflow:hidden;}
.news-feature .nf-media img{width:100%;height:280px;object-fit:cover;transition:transform .45s ease;}
.news-feature:hover .nf-media img{transform:scale(1.04);}
.news-feature .nf-body{padding:26px 28px 28px;}
.news-feature h3{font-size:22px;margin:14px 0 10px;}
.news-feature p{font-size:15px;line-height:1.75;margin-bottom:14px;}
.news-item{
  display:block;background:var(--bg-2);border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;margin-bottom:14px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-item:hover{transform:translateY(-3px);border-color:rgba(20,214,160,.3);box-shadow:var(--shadow-2);}
.news-item .ni-title{
  display:block;font-size:16px;font-weight:600;color:var(--text);line-height:1.6;margin:10px 0 8px;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.news-item:hover .ni-title{color:var(--brand-soft);}
.news-item .ni-meta{font-size:13px;color:var(--text-3);}
.news-empty{
  background:var(--glass);border:1px dashed var(--line);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;
}
.news-empty i{font-size:26px;color:var(--brand);display:block;margin-bottom:14px;}
.news-empty strong{display:block;font-size:17px;margin-bottom:8px;color:var(--text);}
.news-empty span{font-size:14px;color:var(--text-3);}

/* FAQ */
.qa-list{display:block;}
.qa-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .25s ease,background .25s ease;
}
.qa-item.is-open{border-color:rgba(20,214,160,.34);background:rgba(20,214,160,.06);}
.qa-q{
  width:100%;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px 18px 22px;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.5;
  position:relative;
}
.qa-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--grad);opacity:0;transition:opacity .25s ease;
}
.qa-item.is-open .qa-q::before{opacity:1;}
.qa-q .qa-plus{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:14px;transition:transform .3s ease,background .3s ease;
}
.qa-item.is-open .qa-plus{transform:rotate(45deg);background:rgba(20,214,160,.14);}
.qa-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
}
.qa-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-2);}
.qa-item.is-open .qa-a{max-height:420px;}

/* 联系区 */
.contact-info li{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line-2);
  font-size:15px;color:var(--text-2);
}
.contact-info li:last-child{border-bottom:0;}
.contact-info i{color:var(--brand);width:20px;text-align:center;margin-top:6px;}
.contact-info b{display:block;color:var(--text);font-size:15px;font-weight:600;margin-bottom:2px;}
.form-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px;box-shadow:var(--shadow-1);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;color:var(--text-2);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--r-input);
  color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  appearance:none;-webkit-appearance:none;
}
.field textarea{min-height:120px;resize:vertical;line-height:1.7;}
.field select{
  background-image:linear-gradient(45deg,transparent 50%,var(--brand-soft) 50%),linear-gradient(135deg,var(--brand-soft) 50%,transparent 50%);
  background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;
  background-size:6px 6px,6px 6px;background-repeat:no-repeat;
  padding-right:44px;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(20,214,160,.18);
  background:rgba(255,255,255,.06);
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-2);margin-bottom:22px;}
.check-row input{width:18px;height:18px;min-height:0;margin-top:4px;accent-color:var(--brand);}
.form-tip{
  margin-top:14px;font-size:14px;color:var(--brand-soft);
  display:none;
}
.form-tip.show{display:block;}

/* CTA 带 */
.cta-band{
  background:var(--glass);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  border-radius:var(--r-card);
  padding:34px 36px;
}
.cta-band h3{margin-bottom:8px;font-size:22px;}
.cta-band p{margin:0;font-size:15px;}

/* 页脚 */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;color:var(--text);font-weight:700;font-size:16px;}
.site-footer h4{font-size:15px;color:var(--text);margin-bottom:16px;letter-spacing:.4px;}
.footer-list li{margin-bottom:11px;}
.footer-list a{font-size:14px;color:var(--text-2);display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-list a:hover{color:var(--brand);transform:translateX(-2px);}
.footer-desc{font-size:14px;line-height:1.8;color:var(--text-3);margin:0;}
.footer-contact li{font-size:14px;color:var(--text-3);margin-bottom:11px;display:flex;gap:10px;}
.footer-contact i{color:var(--brand);margin-top:5px;width:16px;}
.footer-bottom{
  border-top:1px solid var(--line-2);
  padding:22px 0;font-size:14px;color:var(--text-3);
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
}
.footer-bottom a{color:var(--text-2);}

/* 回到顶部 */
.back-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:rgba(255,255,255,.085);border:1px solid var(--line);backdrop-filter:blur(14px);
  color:var(--text);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);z-index:70;
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,background .2s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:rgba(20,214,160,.18);color:var(--brand-soft);}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}

@media screen and (max-width:1199px){
  .hero{padding:136px 0 80px;}
  .hero-visual{padding-left:0;margin-top:34px;}
}
@media screen and (max-width:1023px){
  :root{--sec-y:72px;}
  .main-nav{gap:18px;}
  .main-nav ul{gap:16px;}
  .main-nav ul li a{font-size:14px;}
  .plan-side{position:static;margin-bottom:28px;}
  .news-feature .nf-media img{height:230px;}
}
@media screen and (max-width:900px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;
    background:rgba(7,16,15,.97);
    backdrop-filter:blur(18px);
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    padding:96px 24px 40px;
    gap:0;
    transform:translateY(-12px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .28s ease,transform .28s ease,visibility .28s ease;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;width:100%;}
  .main-nav ul li{opacity:0;transform:translateY(8px);transition:opacity .3s ease,transform .3s ease;}
  .main-nav.is-open ul li{opacity:1;transform:translateY(0);}
  .main-nav.is-open ul li:nth-child(1){transition-delay:.04s;}
  .main-nav.is-open ul li:nth-child(2){transition-delay:.08s;}
  .main-nav.is-open ul li:nth-child(3){transition-delay:.12s;}
  .main-nav.is-open ul li:nth-child(4){transition-delay:.16s;}
  .main-nav ul li a{
    height:56px;justify-content:space-between;font-size:17px;color:var(--text);
    border-bottom:1px solid var(--line-2);width:100%;
  }
  .main-nav ul li a::after{display:none;}
  .main-nav ul li a::before{
    content:"\f105";font-family:"Font Awesome 6 Free";font-weight:900;
    color:var(--text-3);font-size:14px;order:2;
  }
  .nav-cta{
    position:fixed;left:24px;right:24px;bottom:24px;width:auto;
    min-height:50px;font-size:16px;
  }
  .main-nav ul li a.is-active{color:var(--brand-soft);}
}
@media screen and (max-width:767px){
  :root{--sec-y:56px;}
  .site-container{padding-left:16px;padding-right:16px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .hero{padding:120px 0 64px;min-height:auto;background-position:center;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-panel{padding:20px;}
  .section-head{margin-bottom:32px;}
  .cap-card{padding:22px 22px 22px 26px;}
  .stat-item{flex:0 0 50% !important;max-width:50%;margin-bottom:20px;}
  .form-card{padding:22px;}
  .cta-band{padding:26px 22px;text-align:left;}
  .cta-band .btn{margin-top:16px;width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .back-top{right:16px;bottom:16px;}
  .brand-text{font-size:15px;}
  .brand-mark{width:34px;height:34px;flex:0 0 34px;}
}
@media screen and (max-width:480px){
  h1{font-size:28px;}
  .qa-q{font-size:16px;padding:16px 16px 16px 18px;}
  .qa-a-inner{padding:0 18px 18px;}
  .news-feature .nf-media img{height:190px;}
}

/* roulang page: article */
:root{
  --bg-0:#07100F; --bg-1:#0B1A1B; --bg-2:#0F2426;
  --brand:#14D6A0; --brand-deep:#0BA37B; --brand-soft:#7CF0CE;
  --accent-purple:#7B5CFF; --accent-amber:#FF8A3D;
  --text:#E9F5F2; --text-2:#A6C4BE; --text-3:#6E8C87;
  --glass:rgba(255,255,255,.055); --line:rgba(255,255,255,.10); --line-2:rgba(255,255,255,.06);
  --r-card:18px; --r-img:16px; --r-btn:10px; --r-input:10px; --r-badge:999px; --r-tag:6px;
  --shadow-1:0 2px 10px rgba(0,0,0,.28);
  --shadow-2:0 8px 28px rgba(0,0,0,.42);
  --glow:inset 0 0 0 1px rgba(255,255,255,.14), 0 10px 30px -8px rgba(20,214,160,.55);
  --grad:linear-gradient(135deg,#14D6A0 0%,#7B5CFF 100%);
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--bg-0);color:var(--text);
  font-family:var(--font-cn);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);color:var(--text);margin:0;font-weight:700;line-height:1.35;}
p{margin:0 0 1.1em;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand-soft);}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:16px;}
:focus-visible{outline:3px solid rgba(20,214,160,.45);outline-offset:2px;border-radius:6px;}

.site-container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);border:0;
  font-size:15px;font-weight:600;letter-spacing:.2px;line-height:1;
  transition:transform .2s ease,box-shadow .25s ease,filter .2s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#04140F;box-shadow:var(--glow);}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);color:#04140F;}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);}
.btn-outline{background:transparent;color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand);}
.btn-outline:hover{transform:translateY(-2px);filter:brightness(1.08);color:var(--brand-soft);}
.btn-ghost{background:var(--glass);color:var(--text);box-shadow:inset 0 0 0 1px var(--line);backdrop-filter:blur(14px);}
.btn-ghost:hover{transform:translateY(-2px);color:#fff;}
.btn-block{width:100%;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;background:rgba(7,16,15,.72);
  border-bottom:1px solid transparent;transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
  backdrop-filter:blur(10px);
}
.site-header.is-scrolled{background:rgba(9,20,20,.86);border-bottom-color:var(--line);box-shadow:0 8px 24px rgba(0,0,0,.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:78px;transition:height .3s ease;}
.site-header.is-scrolled .header-inner{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;background:rgba(20,214,160,.10);box-shadow:inset 0 0 0 1px rgba(20,214,160,.30);
}
.brand-text{font-size:17px;letter-spacing:.4px;}
.main-nav{display:flex;align-items:center;gap:28px;}
.main-nav ul{display:flex;align-items:center;gap:26px;}
.main-nav ul a{
  position:relative;display:inline-block;padding:6px 0;color:var(--text-2);font-size:15px;font-weight:500;
}
.main-nav ul a::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;
  background:var(--grad);transform:translateX(-50%);transition:width .25s ease;
}
.main-nav ul a:hover{color:var(--text);}
.main-nav ul a.is-active{color:var(--text);}
.main-nav ul a.is-active::after{width:20px;}
.nav-cta{min-height:42px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;background:var(--glass);border-radius:10px;
  box-shadow:inset 0 0 0 1px var(--line);flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .3s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 进度条 ---------- */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:200;transition:width .1s linear;}

/* ---------- 文章页头 ---------- */
.article-hero{position:relative;padding:56px 0 52px;overflow:hidden;border-bottom:1px solid var(--line-2);}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.30;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,16,15,.72) 0%,rgba(7,16,15,.94) 70%,var(--bg-0) 100%);
}
.article-hero .site-container{position:relative;z-index:2;max-width:900px;}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:18px;}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{width:1px;height:10px;background:rgba(255,255,255,.22);display:inline-block;}
.breadcrumb .current{color:var(--text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 14px;border-radius:var(--r-badge);
  font-size:13px;font-weight:600;letter-spacing:.2px;
}
.badge-brand{background:rgba(20,214,160,.12);color:var(--brand);box-shadow:inset 0 0 0 1px rgba(20,214,160,.26);}
.badge-purple{background:rgba(123,92,255,.14);color:#B7A5FF;box-shadow:inset 0 0 0 1px rgba(123,92,255,.30);}
.badge-amber{background:rgba(255,138,61,.14);color:#FFB183;box-shadow:inset 0 0 0 1px rgba(255,138,61,.28);}
.article-title{
  font-size:clamp(28px,4vw,44px);line-height:1.22;font-weight:700;margin:16px 0 18px;letter-spacing:.2px;
}
.article-lead{color:var(--text-2);font-size:16px;max-width:72ch;margin:0 0 20px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:13px;color:var(--text-3);}
.article-meta i{color:var(--brand);margin-right:6px;}

/* ---------- 正文布局 ---------- */
.article-main{background:var(--bg-0);padding:56px 0 72px;}
.article-grid{display:flex;gap:40px;align-items:flex-start;}
.article-col{min-width:0;flex:1 1 auto;max-width:800px;}
.article-aside{flex:0 0 260px;width:260px;position:sticky;top:100px;display:flex;flex-direction:column;gap:20px;}
.aside-card{
  background:var(--glass);border-radius:var(--r-card);padding:22px;
  box-shadow:inset 0 0 0 1px var(--line);backdrop-filter:blur(14px);
}
.aside-card h3{font-size:15px;font-weight:600;margin-bottom:14px;color:var(--text);display:flex;align-items:center;gap:8px;}
.aside-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--grad);}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:var(--text-2);line-height:1.5;
  border-left:2px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.toc-list a:hover{background:rgba(20,214,160,.08);color:var(--brand);border-left-color:var(--brand);}
.toc-list a.is-lv3{padding-left:22px;font-size:13px;color:var(--text-3);}

/* ---------- 正文排版 ---------- */
.article-body{
  background:var(--bg-1);border-radius:var(--r-card);padding:36px;
  box-shadow:inset 0 0 0 1px var(--line-2);
  font-size:16px;line-height:1.9;color:var(--text-2);
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  position:relative;font-size:clamp(21px,2.4vw,26px);line-height:1.4;color:var(--text);
  margin:2.4em 0 .8em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;width:4px;height:1.05em;border-radius:3px;background:var(--grad);
}
.article-body h3{font-size:20px;color:var(--text);margin:1.9em 0 .6em;}
.article-body p{margin:0 0 1.2em;color:var(--text-2);}
.article-body strong{color:var(--text);}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(20,214,160,.35);}
.article-body a:hover{color:var(--brand-soft);border-bottom-color:var(--brand-soft);}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding:0;}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.6em;}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--brand);}
.article-body ol{counter-reset:li;}
.article-body ol li{position:relative;padding-left:32px;margin-bottom:.7em;counter-increment:li;}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:.18em;width:22px;height:22px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#04140F;background:var(--brand-soft);
}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;border-left:4px solid;border-image:var(--grad) 1;
  background:var(--glass);border-radius:0 var(--r-card) var(--r-card) 0;color:var(--text-2);backdrop-filter:blur(14px);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-img);box-shadow:inset 0 0 0 1px var(--line);margin:1.4em 0 .6em;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;line-height:1.6;}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:14px;display:block;overflow-x:auto;}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--line-2);text-align:left;white-space:nowrap;}
.article-body th{color:var(--text);background:rgba(255,255,255,.03);}
.article-body code{background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px;font-size:14px;color:var(--brand-soft);}
.article-body pre{background:#04100E;padding:16px;border-radius:var(--r-img);overflow-x:auto;box-shadow:inset 0 0 0 1px var(--line-2);}

/* ---------- 空态 ---------- */
.empty-state{
  background:var(--glass);border-radius:var(--r-card);padding:52px 28px;text-align:center;
  box-shadow:inset 0 0 0 1px var(--line);backdrop-filter:blur(14px);
}
.empty-state i{font-size:34px;color:var(--brand);margin-bottom:16px;display:block;}
.empty-state h2{font-size:22px;color:var(--text);margin-bottom:10px;}
.empty-state p{color:var(--text-2);margin-bottom:22px;}

/* ---------- 底部区块 ---------- */
.article-foot{margin-top:36px;display:flex;flex-direction:column;gap:28px;}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tag-row .label{font-size:13px;color:var(--text-3);margin-right:4px;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-tag);
  font-size:13px;color:var(--text-2);background:rgba(255,255,255,.05);box-shadow:inset 0 0 0 1px var(--line-2);
  transition:color .2s ease,background .2s ease,transform .2s ease;
}
.tag:hover{color:var(--brand);background:rgba(20,214,160,.10);transform:translateY(-2px);}
.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.pager-card{
  display:block;background:var(--bg-2);border-radius:var(--r-card);padding:20px;
  box-shadow:inset 0 0 0 1px var(--line-2);transition:transform .25s ease,box-shadow .25s ease;
}
.pager-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2),inset 0 0 0 1px rgba(20,214,160,.28);}
.pager-card span{display:block;font-size:12px;color:var(--text-3);margin-bottom:8px;}
.pager-card strong{display:block;font-size:15px;font-weight:600;color:var(--text);line-height:1.6;}
.pager-card.next{text-align:right;}
.related-inline{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.related-inline h2{grid-column:1/-1;font-size:20px;margin-bottom:4px;}
.related-card{
  display:block;background:var(--bg-2);border-radius:var(--r-card);padding:20px;
  box-shadow:inset 0 0 0 1px var(--line-2);transition:transform .25s ease,box-shadow .25s ease;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.related-card .badge{margin-bottom:12px;}
.related-card strong{display:block;font-size:15px;color:var(--text);line-height:1.6;margin-bottom:10px;}
.related-card em{font-style:normal;font-size:13px;color:var(--text-3);}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--bg-1);border-top:1px solid var(--line-2);padding:44px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--glass);border-radius:var(--r-card);padding:28px 32px;
  box-shadow:inset 0 0 0 1px var(--line);backdrop-filter:blur(14px);
}
.cta-inner h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px;}
.cta-inner p{color:var(--text-2);margin:0;font-size:15px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line-2);padding:56px 0 28px;font-size:14px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);margin-bottom:14px;font-size:16px;}
.footer-desc{color:var(--text-3);line-height:1.85;margin:0;font-size:14px;}
.site-footer h4{font-size:15px;color:var(--text);margin-bottom:16px;font-weight:600;}
.footer-list li{margin-bottom:10px;}
.footer-list a{color:var(--text-3);display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-list a:hover{color:var(--brand);transform:translateX(2px);}
.footer-contact li{display:flex;align-items:center;gap:10px;color:var(--text-3);margin-bottom:12px;}
.footer-contact i{color:var(--brand);width:18px;text-align:center;}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  color:var(--text-3);font-size:13px;
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;background:var(--glass);color:var(--text);
  box-shadow:inset 0 0 0 1px var(--line),var(--shadow-1);backdrop-filter:blur(14px);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s ease;z-index:150;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--brand);box-shadow:inset 0 0 0 1px rgba(20,214,160,.35),var(--shadow-2);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-aside{display:none;}
  .article-col{max-width:none;}
}
@media (max-width:1023px){
  .site-container{padding:0 20px;}
  .article-body{padding:28px 24px;}
  .related-inline{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:860px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:130;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:96px 24px 110px;background:rgba(7,16,15,.98);backdrop-filter:blur(16px);
    transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;transition:all .28s ease;overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav ul li{opacity:0;transform:translateY(10px);animation:none;}
  .main-nav.is-open ul li{animation:navIn .4s ease forwards;}
  .main-nav.is-open ul li:nth-child(1){animation-delay:.04s;}
  .main-nav.is-open ul li:nth-child(2){animation-delay:.08s;}
  .main-nav.is-open ul li:nth-child(3){animation-delay:.12s;}
  .main-nav.is-open ul li:nth-child(4){animation-delay:.16s;}
  @keyframes navIn{to{opacity:1;transform:translateY(0);}}
  .main-nav ul a{
    display:flex;align-items:center;justify-content:space-between;
    height:56px;font-size:16px;color:var(--text);border-bottom:1px solid var(--line-2);
  }
  .main-nav ul a::after{display:none;}
  .main-nav ul a.is-active{color:var(--brand);}
  .nav-cta{position:absolute;left:24px;right:24px;bottom:32px;min-height:50px;font-size:15px;}
}
@media (max-width:640px){
  .site-container{padding:0 16px;}
  .header-inner{height:64px;}
  .brand-text{font-size:15px;}
  .article-hero{padding:36px 0 40px;}
  .article-body{padding:22px 18px;}
  .article-main{padding:40px 0 56px;}
  .pager{grid-template-columns:minmax(0,1fr);}
  .pager-card.next{text-align:left;}
  .related-inline{grid-template-columns:minmax(0,1fr);}
  .cta-inner{padding:24px 20px;flex-direction:column;align-items:stretch;}
  .cta-inner .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:480px){
  .btn{padding:0 18px;}
  .breadcrumb .current{max-width:24ch;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category2 */
:root{
  --bg-0:#07100F;
  --bg-1:#0B1A1B;
  --bg-2:#0F2426;
  --brand:#14D6A0;
  --brand-deep:#0BA37B;
  --brand-soft:#7CF0CE;
  --accent-purple:#7B5CFF;
  --accent-amber:#FF8A3D;
  --text:#E9F5F2;
  --text-2:#A6C4BE;
  --text-3:#6E8C87;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.06);
  --radius-card:18px;
  --radius-img:16px;
  --radius-btn:10px;
  --radius-input:10px;
  --radius-badge:999px;
  --radius-tag:6px;
  --shadow-card:0 2px 10px rgba(0,0,0,.28);
  --shadow-hover:0 8px 28px rgba(0,0,0,.42);
  --glow:inset 0 0 0 1px rgba(255,255,255,.14),0 10px 30px -8px rgba(20,214,160,.55);
  --grad-brand:linear-gradient(135deg,#14D6A0 0%,#0BA37B 52%,#7B5CFF 100%);
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:1px solid rgba(255,255,255,.06);}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--brand);}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);color:var(--text);margin:0;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
::selection{background:rgba(20,214,160,.32);color:#fff;}

/* ---------- 容器 ---------- */
.site-container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:78px;display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(7,16,15,.88) 0%,rgba(7,16,15,.28) 100%);
  transition:height .28s ease,background .28s ease,border-color .28s ease,backdrop-filter .28s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(9,20,20,.84);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-2);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(20,214,160,.12);border:1px solid rgba(20,214,160,.28);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.4px;color:var(--text);white-space:nowrap;}
.brand:hover .brand-text{color:var(--brand-soft);}

.main-nav{display:flex;align-items:center;gap:30px;}
.main-nav ul{display:flex;align-items:center;gap:26px;list-style:none;}
.main-nav ul li a{
  position:relative;display:inline-flex;align-items:center;height:44px;
  font-size:15px;color:var(--text-2);transition:color .2s ease,transform .2s ease;
}
.main-nav ul li a:hover{color:var(--text);transform:translateY(-1px);}
.main-nav ul li a.is-active{color:var(--text);font-weight:600;}
.main-nav ul li a.is-active::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--grad-brand);
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;border:0;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,color .2s ease;
}
.btn:focus-visible{outline:3px solid rgba(20,214,160,.45);outline-offset:2px;}
.btn-primary{
  color:#04231B;
  background:linear-gradient(135deg,#14D6A0 0%,#0BA37B 58%,#0d8f8a 100%);
  box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);color:#04231B;}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-outline{
  color:var(--brand);background:transparent;border:1px solid rgba(20,214,160,.5);
}
.btn-outline:hover{transform:translateY(-2px);background:rgba(20,214,160,.1);color:var(--brand-soft);}
.btn-ghost{
  color:var(--text);background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.btn-ghost:hover{transform:translateY(-2px);background:rgba(255,255,255,.09);color:var(--text);}
.nav-cta{height:42px;padding:0 18px;font-size:14px;}

.nav-toggle{
  display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:var(--glass);border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:background .2s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle:hover{background:rgba(255,255,255,.1);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 页头 ---------- */
.page-hero{position:relative;padding:156px 0 84px;overflow:hidden;background:var(--bg-0);}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  opacity:.26;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,16,15,.78) 0%,rgba(7,16,15,.9) 58%,rgba(7,16,15,1) 100%);
}
.page-hero-inner{position:relative;z-index:2;max-width:880px;}
.breadcrumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);margin-bottom:20px;
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{width:1px;height:11px;background:rgba(255,255,255,.18);display:inline-block;}
.breadcrumb .current{color:var(--text-2);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--radius-badge);
  font-size:13px;line-height:1.4;font-weight:600;
}
.badge-brand{background:rgba(20,214,160,.12);color:var(--brand);border:1px solid rgba(20,214,160,.22);}
.badge-purple{background:rgba(123,92,255,.14);color:#B7A6FF;border:1px solid rgba(123,92,255,.26);}
.page-hero h1{
  font-size:clamp(30px,4.6vw,50px);line-height:1.18;font-weight:700;
  margin:20px 0 18px;letter-spacing:.2px;
}
.page-hero h1 .hl{
  background:var(--grad-brand);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.page-lead{font-size:17px;line-height:1.85;color:var(--text-2);max-width:760px;}

/* ---------- 板块 ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--bg-1);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.3;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);font-weight:600;letter-spacing:.6px;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad-brand);}

/* ---------- 指标条 ---------- */
.metric-bar{
  margin-top:-44px;position:relative;z-index:5;
  background:rgba(15,36,38,.72);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  padding:26px 30px;
}
.metric-bar .grid-x{row-gap:22px;}
.metric-item{padding:0 18px;border-left:1px solid var(--line-2);}
.metric-item:first-child{border-left:0;}
.metric-num{
  font-size:30px;font-weight:700;line-height:1.1;
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  display:inline-block;
}
.metric-unit{font-size:14px;color:var(--text-3);margin-left:6px;}
.metric-label{margin-top:6px;font-size:13px;color:var(--text-2);}

/* ---------- 锚点目录 + 分节长文 ---------- */
.anchor-layout{row-gap:34px;}
.toc-card{
  position:sticky;top:96px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px 20px;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.toc-title{
  font-size:14px;font-weight:600;color:var(--text-2);letter-spacing:.6px;
  margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line-2);
}
.toc-list{list-style:none;}
.toc-list li{margin-bottom:6px;}
.toc-list a{
  display:block;padding:9px 12px;border-radius:8px;
  font-size:14px;color:var(--text-2);border-left:2px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.toc-list a:hover{color:var(--text);background:rgba(255,255,255,.05);border-left-color:var(--brand);}
.toc-cta{margin-top:20px;padding-top:18px;border-top:1px solid var(--line-2);}
.toc-cta .btn{width:100%;height:42px;font-size:14px;}

.content-flow section{padding-bottom:52px;scroll-margin-top:100px;}
.content-flow section:last-child{padding-bottom:0;}
.content-flow h2{
  font-size:clamp(21px,2.4vw,27px);line-height:1.35;margin-bottom:18px;
  padding-left:14px;border-left:4px solid transparent;
  border-image:var(--grad-brand) 1;
  border-image-slice:1;
  border-radius:2px;
}
.content-flow h3{font-size:19px;line-height:1.45;margin:26px 0 10px;font-weight:600;}
.content-flow p{color:var(--text-2);font-size:16px;line-height:1.9;margin-bottom:16px;}
.content-flow p strong{color:var(--text);font-weight:600;}
.lead-quote{
  background:var(--glass);border-left:4px solid transparent;
  border-image:var(--grad-brand) 1;border-image-slice:1;
  border-radius:0 12px 12px 0;padding:18px 22px;margin:0 0 22px;
}
.lead-quote p{margin:0;color:var(--text-2);}

/* 要点列表 */
.point-list{list-style:none;margin:8px 0 20px;}
.point-list li{
  position:relative;padding-left:20px;margin-bottom:10px;
  font-size:15px;line-height:1.75;color:var(--text-2);
}
.point-list li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 3px rgba(20,214,160,.14);
}
.point-list li b{color:var(--text);font-weight:600;}

/* 流程条 */
.step-flow{list-style:none;position:relative;margin:16px 0 8px;}
.step-item{position:relative;padding:0 0 28px 62px;}
.step-item:last-child{padding-bottom:0;}
.step-item::before{
  content:"";position:absolute;left:17px;top:40px;bottom:-6px;width:2px;
  background:linear-gradient(180deg,rgba(20,214,160,.55),rgba(123,92,255,.22));
}
.step-item:last-child::before{display:none;}
.step-num{
  position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:#04231B;letter-spacing:.5px;
  background:linear-gradient(135deg,#14D6A0,#7CF0CE);
  box-shadow:0 6px 18px -6px rgba(20,214,160,.6);
}
.step-body h3{margin:4px 0 8px;font-size:18px;}
.step-body p{font-size:15px;line-height:1.8;color:var(--text-2);margin-bottom:0;}

/* 情形速查 */
.case-grid{row-gap:22px;}
.case-card{
  height:100%;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(20,214,160,.32);}
.case-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(20,214,160,.1);border:1px solid rgba(20,214,160,.24);
  color:var(--brand);font-size:18px;margin-bottom:16px;
}
.case-card h3{font-size:18px;margin-bottom:10px;}
.case-card p{font-size:15px;line-height:1.75;color:var(--text-2);}

/* 常见问答 */
.qa-plain{margin:0;}
.qa-plain dt{
  font-size:17px;font-weight:600;color:var(--text);margin-bottom:8px;
  position:relative;padding-left:24px;
}
.qa-plain dt::before{
  content:"问";position:absolute;left:0;top:2px;
  font-size:12px;font-weight:700;color:var(--brand);
}
.qa-plain dd{
  margin:0 0 22px;padding:0 0 0 24px;
  font-size:15px;line-height:1.8;color:var(--text-2);
  border-left:1px solid var(--line-2);
}

/* 提示卡 */
.notice-card{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--glass);border:1px solid var(--line);border-radius:14px;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  padding:22px 24px;margin-top:8px;
}
.notice-card i{color:var(--brand);font-size:20px;margin-top:4px;}
.notice-card p{font-size:15px;line-height:1.8;color:var(--text-2);margin:0;}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--bg-1);
  border-top:1px solid var(--line-2);
  padding:56px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  padding:32px 36px;
}
.cta-inner h2{font-size:22px;line-height:1.4;margin-bottom:8px;}
.cta-inner p{font-size:15px;color:var(--text-2);}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line-2);padding:72px 0 28px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text);margin-bottom:14px;}
.footer-desc{font-size:14px;line-height:1.8;color:var(--text-3);max-width:340px;}
.site-footer h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:16px;}
.footer-list{list-style:none;}
.footer-list li{margin-bottom:10px;}
.footer-list a{display:inline-block;font-size:14px;color:var(--text-2);transition:color .2s ease,transform .2s ease;}
.footer-list a:hover{color:var(--brand);transform:translateX(2px);}
.footer-contact{list-style:none;font-size:14px;color:var(--text-2);}
.footer-contact li{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.footer-contact i{color:var(--brand);font-size:14px;width:16px;}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line-2);
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--brand);}

/* 回到顶部 */
.back-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;
  z-index:70;
}
.back-top.is-show{opacity:1;visibility:visible;transform:none;}
.back-top:hover{background:rgba(20,214,160,.16);color:var(--brand);}
.back-top:focus-visible{outline:3px solid rgba(20,214,160,.45);outline-offset:2px;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1199px){
  .section{padding:80px 0;}
}
@media screen and (max-width:1023px){
  .section{padding:72px 0;}
  .page-hero{padding:132px 0 72px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:96px 24px 32px;
    background:rgba(7,16,15,.97);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:none;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav ul li a{
    height:56px;font-size:17px;color:var(--text);
    border-bottom:1px solid var(--line-2);justify-content:space-between;
  }
  .main-nav ul li a::after{
    content:"\f054";font-family:"Font Awesome 6 Free";font-weight:900;
    font-size:12px;color:var(--text-3);position:static;transform:none;
    width:auto;height:auto;background:none;left:auto;bottom:auto;
  }
  .main-nav ul li a.is-active::after{color:var(--brand);}
  .main-nav ul li a.is-active{box-shadow:none;}
  .main-nav ul li a.is-active::before{display:none;}
  .nav-cta{margin-top:auto;width:100%;height:52px;font-size:16px;}
  .main-nav.is-open ul li{animation:fadeUp .4s ease both;}
  .main-nav.is-open ul li:nth-child(1){animation-delay:.04s;}
  .main-nav.is-open ul li:nth-child(2){animation-delay:.08s;}
  .main-nav.is-open ul li:nth-child(3){animation-delay:.12s;}
  .main-nav.is-open ul li:nth-child(4){animation-delay:.16s;}
  .toc-card{position:static;}
  .toc-list{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;}
  .toc-list li{margin-bottom:0;flex:0 0 auto;}
  .toc-list a{white-space:nowrap;border-left:1px solid transparent;background:rgba(255,255,255,.05);}
  .toc-cta{margin-top:16px;padding-top:16px;}
  .metric-bar{margin-top:0;padding:24px 20px;}
  .metric-item{border-left:0;padding:0 8px;}
}
@media screen and (max-width:768px){
  .site-container{padding-left:18px;padding-right:18px;}
  .page-hero{padding:120px 0 64px;}
  .page-lead{font-size:16px;}
  .cta-inner{padding:26px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}
@media screen and (max-width:520px){
  .section{padding:56px 0;}
  .brand-text{font-size:15px;}
  .btn{width:100%;}
  .main-nav ul li a::after{font-size:11px;}
  .step-item{padding-left:52px;}
  .step-num{width:32px;height:32px;font-size:12px;}
  .step-item::before{left:15px;top:36px;}
  .cta-inner h2{font-size:19px;}
  .footer-bottom{justify-content:flex-start;}
  .back-top{right:16px;bottom:16px;}
}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(12px);}
  to{opacity:1;transform:none;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
}

/* roulang page: category1 */
:root{
  --bg-0:#07100F;
  --bg-1:#0B1A1B;
  --bg-2:#0F2426;
  --brand:#14D6A0;
  --brand-deep:#0BA37B;
  --brand-soft:#7CF0CE;
  --accent-purple:#7B5CFF;
  --accent-amber:#FF8A3D;
  --text:#E9F5F2;
  --text-2:#A6C4BE;
  --text-3:#6E8C87;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.06);
  --r-card:18px;
  --r-img:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-pill:999px;
  --shadow-1:0 2px 10px rgba(0,0,0,.28);
  --shadow-2:0 8px 28px rgba(0,0,0,.42);
  --glow:inset 0 0 0 1px rgba(255,255,255,.14), 0 10px 30px -8px rgba(20,214,160,.55);
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  margin:0;
  color:var(--text);
  font-family:var(--font-cn);
  font-weight:700;
  letter-spacing:.2px;
}
h1{font-size:clamp(30px,4.6vw,54px);line-height:1.18;font-weight:700;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.3;font-weight:700;}
h3{font-size:21px;line-height:1.45;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
a{color:var(--brand-soft);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand);}
img{max-width:100%;display:block;}
ul,ol{margin:0;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:3px solid rgba(20,214,160,.45);outline-offset:2px;border-radius:6px;}

.site-container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--bg-1);}
.section--deep{background:var(--bg-2);}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  height:78px;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:height .28s ease,background .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(7,16,15,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 24px rgba(0,0,0,.34);
}
.header-inner{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-size:17px;
  font-weight:700;
  letter-spacing:.3px;
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:34px;
  height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  background:rgba(20,214,160,.12);
  border:1px solid rgba(20,214,160,.28);
  box-shadow:0 0 0 1px rgba(255,255,255,.03) inset;
  flex:none;
}
.brand-text{
  background:linear-gradient(135deg,var(--brand-soft),var(--brand) 55%,var(--accent-purple));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:18px;
}
.main-nav ul{
  display:flex;
  align-items:center;
  gap:4px;
  list-style:none;
  padding:0;
  margin:0;
}
.main-nav ul li a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .2s ease,transform .2s ease,background .2s ease;
}
.main-nav ul li a:hover{
  color:var(--text);
  transform:translateY(-1px);
  background:rgba(255,255,255,.04);
}
.main-nav ul li a.is-active{color:var(--text);font-weight:600;}
.main-nav ul li a.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:4px;
  width:20px;
  height:2px;
  margin-left:-10px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent-purple));
}
.nav-cta{
  min-height:44px;
  padding:0 20px;
  font-size:14.5px;
  white-space:nowrap;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--glass);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  padding:0;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 24px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-soft),var(--brand) 45%,var(--brand-deep));
  color:#04211A;
  box-shadow:var(--glow);
  font-weight:700;
}
.btn-primary:hover{
  color:#04211A;
  transform:translateY(-2px);
  filter:brightness(1.06);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.2), 0 14px 34px -10px rgba(20,214,160,.65);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-outline{
  background:transparent;
  border-color:rgba(20,214,160,.55);
  color:var(--brand-soft);
}
.btn-outline:hover{
  color:var(--brand);
  border-color:var(--brand);
  transform:translateY(-2px);
  background:rgba(20,214,160,.07);
}
.btn-outline:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{
  background:var(--glass);
  border-color:var(--line);
  color:var(--text);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.btn-ghost:hover{
  color:var(--text);
  border-color:rgba(255,255,255,.22);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0);filter:brightness(.96);}

/* ============ badges & labels ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 12px;
  border-radius:var(--r-pill);
  background:rgba(20,214,160,.12);
  border:1px solid rgba(20,214,160,.28);
  color:var(--brand-soft);
  font-size:13px;
  line-height:1;
  font-weight:600;
  white-space:nowrap;
}
.badge--purple{
  background:rgba(123,92,255,.14);
  border-color:rgba(123,92,255,.32);
  color:#C9BCFF;
}
.badge--amber{
  background:rgba(255,138,61,.14);
  border-color:rgba(255,138,61,.32);
  color:#FFC39A;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 10px;
  border-radius:6px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:13px;
  line-height:1;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:2px;
  color:var(--text-3);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent-purple));
}
.section-title{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:40px;
}
.section-title p{
  margin:10px 0 0;
  max-width:640px;
  color:var(--text-2);
  font-size:16px;
}

/* ============ page banner ============ */
.page-banner{
  position:relative;
  padding:96px 0 76px;
  background-image:linear-gradient(180deg,rgba(7,16,15,.82),rgba(7,16,15,.96)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line-2);
  overflow:hidden;
}
.page-banner::after{
  content:"";
  position:absolute;
  right:-120px;
  top:-120px;
  width:380px;
  height:380px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(20,214,160,.22),rgba(20,214,160,0) 68%);
  pointer-events:none;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{
  width:1px;
  height:10px;
  background:rgba(255,255,255,.22);
  display:inline-block;
}
.banner-inner{
  position:relative;
  z-index:2;
  max-width:840px;
}
.banner-title{
  margin-bottom:20px;
}
.banner-title .accent{
  background:linear-gradient(135deg,var(--brand-soft),var(--brand) 52%,var(--accent-purple));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.banner-lead{
  font-size:17px;
  color:var(--text-2);
  max-width:640px;
  margin-bottom:28px;
}
.banner-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:center;
}

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

/* ============ overview strip ============ */
.overview{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.overview-text h2{margin-bottom:18px;}
.overview-text p{color:var(--text-2);max-width:560px;}
.metric-strip{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  padding:22px;
}
.metric{
  text-align:center;
  padding:14px 8px;
  border-radius:14px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line-2);
}
.metric-num{
  font-family:var(--font-num);
  font-size:30px;
  font-weight:700;
  line-height:1.1;
  background:linear-gradient(135deg,var(--brand-soft),var(--brand) 50%,var(--accent-purple));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.metric-num small{font-size:14px;margin-left:2px;}
.metric-label{
  margin-top:6px;
  font-size:13px;
  color:var(--text-3);
  line-height:1.5;
}

/* ============ feature rows ============ */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:56px 0;
  border-bottom:1px solid var(--line-2);
}
.feature-row:first-of-type{padding-top:16px;}
.feature-row:last-of-type{border-bottom:0;padding-bottom:16px;}
.feature-row.reverse .feature-media{order:2;}
.feature-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.feature-media img{
  width:100%;
  height:360px;
  object-fit:cover;
  transition:transform .5s ease;
}
.feature-row:hover .feature-media img{transform:scale(1.04);}
.feature-media .media-tag{
  position:absolute;
  left:16px;
  top:16px;
  z-index:2;
}
.feature-index{
  font-family:var(--font-num);
  font-size:13px;
  letter-spacing:2px;
  color:var(--text-3);
  margin-bottom:12px;
}
.feature-body h2{margin-bottom:16px;}
.feature-body p{color:var(--text-2);font-size:16px;}
.point-list{
  list-style:none;
  padding:0;
  margin:22px 0 0;
}
.point-list li{
  position:relative;
  padding-left:22px;
  margin-bottom:12px;
  font-size:15px;
  line-height:1.75;
  color:var(--text-2);
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(20,214,160,.14);
}
.point-list li strong{color:var(--text);font-weight:600;}

/* ============ module list ============ */
.module-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:44px;
  align-items:start;
}
.module-aside{
  padding:30px;
  position:sticky;
  top:96px;
}
.module-aside h3{margin-bottom:14px;}
.module-aside p{color:var(--text-2);font-size:15px;}
.aside-list{
  list-style:none;
  padding:0;
  margin:22px 0 0;
  border-top:1px solid var(--line-2);
}
.aside-list li{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 0;
  border-bottom:1px solid var(--line-2);
  font-size:14.5px;
  color:var(--text-2);
}
.aside-list li i{color:var(--brand);font-size:13px;}
.module-list{
  list-style:none;
  padding:0;
  margin:0;
}
.module-list li{
  display:grid;
  grid-template-columns:48px 1fr;
  gap:18px;
  padding:22px 24px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:14px;
  box-shadow:var(--shadow-1);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.module-list li:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-2);
  border-color:rgba(20,214,160,.34);
}
.module-num{
  width:48px;
  height:48px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-num);
  font-weight:700;
  font-size:16px;
  color:var(--brand-soft);
  background:rgba(20,214,160,.1);
  border:1px solid rgba(20,214,160,.26);
}
.module-list li:nth-child(even) .module-num{
  color:#C9BCFF;
  background:rgba(123,92,255,.12);
  border-color:rgba(123,92,255,.3);
}
.module-content h3{
  font-size:18px;
  margin-bottom:8px;
  transition:color .2s ease;
}
.module-list li:hover .module-content h3{color:var(--brand-soft);}
.module-content p{
  color:var(--text-2);
  font-size:15px;
  line-height:1.75;
  margin:0;
}

/* ============ ticket / notes ============ */
.ticket{
  display:grid;
  grid-template-columns:300px 1fr;
  gap:0;
  overflow:hidden;
}
.ticket-head{
  padding:34px 30px;
  background:linear-gradient(160deg,rgba(20,214,160,.14),rgba(123,92,255,.10));
  border-right:1px dashed rgba(255,255,255,.18);
}
.ticket-head h3{margin-bottom:12px;}
.ticket-head p{color:var(--text-2);font-size:14.5px;margin:0;}
.ticket-body{
  padding:30px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.note-item{
  padding:18px;
  border-radius:14px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line-2);
  transition:border-color .22s ease,transform .22s ease;
}
.note-item:hover{border-color:rgba(20,214,160,.32);transform:translateY(-3px);}
.note-item .num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:28px;
  height:28px;
  border-radius:8px;
  background:rgba(20,214,160,.14);
  color:var(--brand-soft);
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  margin-bottom:12px;
}
.note-item h4{font-size:15.5px;margin-bottom:8px;}
.note-item p{font-size:14px;color:var(--text-2);line-height:1.7;margin:0;}

.info-bar{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
  padding:26px;
  margin-top:28px;
}
.info-bar .item{
  display:flex;
  align-items:flex-start;
  gap:14px;
}
.info-bar .item i{
  color:var(--brand);
  font-size:18px;
  margin-top:4px;
}
.info-bar .item strong{
  display:block;
  font-size:15px;
  color:var(--text);
  margin-bottom:4px;
  font-weight:600;
}
.info-bar .item span{font-size:13.5px;color:var(--text-3);}

/* ============ cta band ============ */
.cta-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:26px;
  padding:36px 38px;
  border-top:1px solid var(--line);
  border-radius:var(--r-card);
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:8px;}
.cta-band p{margin:0;color:var(--text-2);font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ============ footer ============ */
.site-footer{
  background:var(--bg-0);
  border-top:1px solid var(--line);
  padding:72px 0 30px;
  margin-top:0;
}
.footer-grid{padding-bottom:8px;}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--text);
  margin-bottom:16px;
}
.footer-desc{
  color:var(--text-3);
  font-size:14px;
  line-height:1.85;
  max-width:340px;
  margin:0;
}
.site-footer h4{
  font-size:15px;
  margin-bottom:18px;
  color:var(--text);
}
.footer-list{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-list li{margin-bottom:12px;}
.footer-list a{
  color:var(--text-2);
  font-size:14px;
  display:inline-block;
  transition:color .2s ease,transform .2s ease;
}
.footer-list a:hover{
  color:var(--brand);
  transform:translateX(2px);
}
.footer-contact{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:var(--text-2);
  font-size:14px;
  margin-bottom:14px;
  line-height:1.7;
}
.footer-contact li i{
  color:var(--brand);
  margin-top:5px;
  font-size:14px;
}
.footer-bottom{
  margin-top:44px;
  padding-top:24px;
  border-top:1px solid var(--line-2);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  color:var(--text-3);
  font-size:13.5px;
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--brand);}

/* ============ to top ============ */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(255,255,255,.07);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,color .2s ease;
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{color:var(--brand);}

/* ============ foundation overrides ============ */
body,html{background:var(--bg-0);}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);}
p,ul,ol,li{font-family:var(--font-cn);}
a{color:var(--brand-soft);}
.button,.btn{font-family:var(--font-cn);}
.grid-x>.cell{padding-left:.9375rem;padding-right:.9375rem;}
.grid-margin-x{margin-left:-.9375rem;margin-right:-.9375rem;}

/* ============ responsive ============ */
@media (max-width:1199px){
  .overview{gap:40px;}
  .module-grid{grid-template-columns:1fr;gap:34px;}
  .module-aside{position:static;}
}
@media (max-width:1023px){
  .site-header{height:64px;}
  .site-header.is-scrolled{height:64px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;
    top:64px;
    left:0;
    right:0;
    bottom:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:16px 20px 28px;
    background:var(--bg-1);
    border-top:1px solid var(--line-2);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .26s ease,transform .26s ease,visibility .26s ease;
    z-index:55;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:none;}
  .main-nav ul{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
  }
  .main-nav ul li{
    opacity:0;
    transform:translateY(8px);
  }
  .main-nav.is-open ul li{animation:navFade .34s ease forwards;}
  .main-nav.is-open ul li:nth-child(1){animation-delay:.04s;}
  .main-nav.is-open ul li:nth-child(2){animation-delay:.08s;}
  .main-nav.is-open ul li:nth-child(3){animation-delay:.12s;}
  .main-nav.is-open ul li:nth-child(4){animation-delay:.16s;}
  .main-nav ul li a{
    display:flex;
    align-items:center;
    height:56px;
    padding:0 4px;
    font-size:16px;
    border-bottom:1px solid var(--line-2);
    border-radius:0;
    background:transparent;
    width:100%;
  }
  .main-nav ul li a:hover{transform:none;background:transparent;}
  .main-nav ul li a.is-active{
    color:var(--brand);
    box-shadow:inset 3px 0 0 var(--brand);
    padding-left:14px;
  }
  .main-nav ul li a.is-active::after{display:none;}
  .nav-cta{
    margin-top:auto;
    width:100%;
    min-height:50px;
    font-size:16px;
  }
  @keyframes navFade{
    to{opacity:1;transform:none;}
  }
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .overview{grid-template-columns:1fr;}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:44px 0;}
  .feature-row.reverse .feature-media{order:0;}
  .feature-media img{height:300px;}
  .ticket{grid-template-columns:1fr;}
  .ticket-head{border-right:0;border-bottom:1px dashed rgba(255,255,255,.18);}
  .ticket-body{grid-template-columns:1fr;gap:16px;}
  .info-bar{grid-template-columns:1fr;gap:20px;}
  .page-banner{padding:72px 0 60px;}
}
@media (max-width:639px){
  .site-container{padding:0 16px;}
  .section{padding:56px 0;}
  .section--tight{padding:44px 0;}
  .banner-lead{font-size:16px;}
  .banner-actions .btn{width:100%;}
  .metric-strip{grid-template-columns:1fr 1fr;gap:12px;padding:18px;}
  .metric-num{font-size:26px;}
  .feature-media img{height:230px;}
  .module-list li{grid-template-columns:40px 1fr;gap:14px;padding:18px;}
  .module-num{width:40px;height:40px;font-size:14px;border-radius:10px;}
  .cta-band{padding:28px 22px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .to-top{right:16px;bottom:16px;}
}
@media (max-width:479px){
  .brand-text{font-size:15px;}
  .metric-strip{grid-template-columns:1fr 1fr;}
  .banner-title{font-size:28px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --bg-0:#07100F;
  --bg-1:#0B1A1B;
  --bg-2:#0F2426;
  --brand:#14D6A0;
  --brand-deep:#0BA37B;
  --brand-soft:#7CF0CE;
  --accent-purple:#7B5CFF;
  --accent-amber:#FF8A3D;
  --text:#E9F5F2;
  --text-2:#A6C4BE;
  --text-3:#6E8C87;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.06);
  --radius-card:18px;
  --radius-img:16px;
  --radius-btn:10px;
  --radius-input:10px;
  --shadow-sm:0 2px 10px rgba(0,0,0,.28);
  --shadow-lg:0 8px 28px rgba(0,0,0,.42);
  --glow:inset 0 0 0 1px rgba(255,255,255,.14),0 10px 30px -8px rgba(20,214,160,.55);
  --grad:linear-gradient(135deg,#14D6A0 0%,#7B5CFF 100%);
  --nav-h:78px;
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-soft);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:.2px;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(20,214,160,.45);outline-offset:2px;}
::selection{background:rgba(20,214,160,.28);color:#fff;}

.site-container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.4;cursor:pointer;
  border:1px solid transparent;transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,filter .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad);color:#04140F;box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);color:#04140F;}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);}
.btn-ghost{
  background:var(--glass);color:var(--text);border-color:var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.btn-ghost:hover{transform:translateY(-2px);color:var(--brand-soft);border-color:rgba(20,214,160,.45);}
.btn-ghost:active{transform:translateY(0);}
.btn-outline{
  background:transparent;color:var(--brand);border-color:rgba(20,214,160,.55);
}
.btn-outline:hover{transform:translateY(-2px);background:rgba(20,214,160,.10);color:var(--brand-soft);}
.btn-outline:active{transform:translateY(0);}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:var(--nav-h);
  background:linear-gradient(180deg,rgba(7,16,15,.92) 0%,rgba(7,16,15,.55) 100%);
  border-bottom:1px solid transparent;
  transition:height .28s ease,background-color .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(9,20,20,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-2);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;background:rgba(20,214,160,.10);
  border:1px solid rgba(20,214,160,.28);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.4px;}
.main-nav{display:flex;align-items:center;gap:28px;}
.main-nav ul{display:flex;align-items:center;gap:6px;}
.main-nav ul li a{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;
  color:var(--text-2);font-size:15px;font-weight:500;border-radius:8px;
  transition:color .2s ease,transform .2s ease;
}
.main-nav ul li a:hover{color:var(--text);transform:translateY(-1px);}
.main-nav ul li a::after{
  content:"";position:absolute;left:50%;bottom:6px;width:0;height:2px;border-radius:2px;
  background:var(--grad);transform:translateX(-50%);transition:width .24s ease;
}
.main-nav ul li a.is-active{color:var(--text);font-weight:700;}
.main-nav ul li a.is-active::after{width:20px;}
.nav-cta{margin-left:4px;}
.nav-toggle{
  display:none;width:44px;height:44px;padding:0;border:1px solid var(--line);
  border-radius:10px;background:var(--glass);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 页头 ============ */
.page-hero{
  position:relative;padding:150px 0 72px;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(7,16,15,.86) 0%,rgba(7,16,15,.94) 62%,var(--bg-0) 100%),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;background:var(--line-2);
}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:20px;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{width:1px;height:10px;background:rgba(255,255,255,.22);}
.breadcrumb .current{color:var(--brand);}
.page-hero h1{
  font-size:clamp(30px,4.6vw,54px);line-height:1.18;font-weight:700;max-width:16em;
}
.page-hero h1 em{
  font-style:normal;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  margin-top:20px;max-width:720px;font-size:17px;line-height:1.85;color:var(--text-2);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 14px;border-radius:999px;
  font-size:13px;color:var(--brand);background:rgba(20,214,160,.12);
  border:1px solid rgba(20,214,160,.24);
}
.chip.purple{color:#BFAFFF;background:rgba(123,92,255,.14);border-color:rgba(123,92,255,.28);}
.chip.amber{color:#FFB483;background:rgba(255,138,61,.13);border-color:rgba(255,138,61,.26);}

/* ============ 板块 ============ */
.section{padding:96px 0;}
.section.alt{background:var(--bg-1);}
.section-head{max-width:760px;margin-bottom:52px;}
.section-head .eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2px;color:var(--brand);
  padding-left:12px;position:relative;margin-bottom:14px;
}
.section-head .eyebrow::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:14px;border-radius:2px;background:var(--grad);
}
.section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.3;}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16px;line-height:1.85;}

/* ============ 主题卡片 ============ */
.topic-card{
  height:100%;display:flex;flex-direction:column;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(20,214,160,.35);}
.topic-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-2);}
.topic-media img{
  width:100%;height:100%;object-fit:cover;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);
  transition:transform .5s ease;
}
.topic-card:hover .topic-media img{transform:scale(1.04);}
.topic-body{padding:26px 28px 28px;display:flex;flex-direction:column;gap:14px;flex:1;}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;
  height:26px;padding:0 12px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--brand);background:rgba(20,214,160,.12);border:1px solid rgba(20,214,160,.22);
}
.badge.purple{color:#BFAFFF;background:rgba(123,92,255,.14);border-color:rgba(123,92,255,.26);}
.badge.amber{color:#FFB483;background:rgba(255,138,61,.13);border-color:rgba(255,138,61,.24);}
.topic-body h3{font-size:20px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.topic-body p{
  font-size:15px;line-height:1.75;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.topic-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--brand);min-height:44px;
}
.topic-link i{transition:transform .22s ease;}
.topic-card:hover .topic-link i{transform:translateX(4px);}

/* ============ 排查步骤 ============ */
.steps{border-top:1px solid var(--line-2);}
.step-row{
  display:grid;grid-template-columns:96px 1fr;gap:26px;align-items:start;
  padding:30px 0;border-bottom:1px solid var(--line-2);
  transition:background-color .25s ease;
}
.step-row:hover{background:rgba(255,255,255,.022);}
.step-no{
  font-size:34px;font-weight:700;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-family:Inter,system-ui,sans-serif;
}
.step-main h3{font-size:20px;margin-bottom:10px;}
.step-main p{color:var(--text-2);font-size:15.5px;line-height:1.8;}
.step-note{
  margin-top:14px;display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
}
.step-note i{color:var(--brand);}

/* ============ 提示条 ============ */
.notice-bar{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px 28px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.notice-bar .nb-icon{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,214,160,.12);color:var(--brand);font-size:18px;
}
.notice-bar h4{font-size:17px;margin-bottom:6px;}
.notice-bar p{color:var(--text-2);font-size:15px;line-height:1.75;}

/* ============ FAQ ============ */
.faq-accordion{margin:0;background:transparent;border:none;}
.faq-accordion .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease,background-color .25s ease,box-shadow .25s ease;
}
.faq-accordion .accordion-item:hover{border-color:rgba(20,214,160,.3);}
.faq-accordion .accordion-item.is-active{
  border-color:rgba(20,214,160,.45);
  box-shadow:inset 3px 0 0 var(--brand),0 8px 28px rgba(0,0,0,.32);
  background:rgba(20,214,160,.06);
}
.faq-accordion .accordion-title{
  position:relative;display:block;border:none;background:transparent;
  padding:18px 56px 18px 22px;font-size:17px;font-weight:600;line-height:1.55;color:var(--text);
  transition:color .2s ease;
}
.faq-accordion .accordion-title:hover,.faq-accordion .accordion-title:focus{color:var(--brand-soft);background:transparent;}
.faq-accordion .accordion-title::before{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--brand);line-height:1;
  transition:transform .3s ease;margin:0;padding:0;top:50%;
}
.faq-accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);}
.faq-accordion .accordion-content{
  border:none;background:transparent;padding:0 22px 22px;color:var(--text-2);font-size:15.5px;line-height:1.8;
}
.faq-accordion .accordion-content p{margin:0;}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--glass);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:52px 0;
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;}
.cta-inner p{margin-top:12px;color:var(--text-2);font-size:15.5px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-0);border-top:1px solid var(--line-2);
  padding:72px 0 28px;font-size:14px;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text);margin-bottom:16px;}
.footer-desc{color:var(--text-3);font-size:14px;line-height:1.8;max-width:340px;}
.site-footer h4{font-size:15px;margin-bottom:18px;color:var(--text);letter-spacing:.5px;}
.footer-list li{margin-bottom:10px;}
.footer-list a{color:var(--text-2);display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-list a:hover{color:var(--brand);transform:translateX(2px);}
.footer-contact li{display:flex;align-items:center;gap:10px;color:var(--text-2);margin-bottom:12px;}
.footer-contact i{color:var(--brand);width:16px;text-align:center;}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line-2);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  color:var(--text-3);font-size:13.5px;
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--brand);}

/* ============ 回到顶部 ============ */
.back-to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,color .2s ease;
  cursor:pointer;z-index:70;
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.back-to-top:hover{color:var(--brand);border-color:rgba(20,214,160,.45);}

/* ============ 响应式 ============ */
@media screen and (max-width:1023px){
  .section{padding:72px 0;}
  .page-hero{padding:130px 0 60px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(8,18,18,.97);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    padding:18px 24px 110px;overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .26s ease,transform .26s ease,visibility .26s ease;
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;width:100%;}
  .main-nav ul li{opacity:0;transform:translateY(8px);transition:opacity .3s ease,transform .3s ease;}
  .main-nav.is-open ul li{opacity:1;transform:translateY(0);}
  .main-nav.is-open ul li:nth-child(1){transition-delay:.04s;}
  .main-nav.is-open ul li:nth-child(2){transition-delay:.08s;}
  .main-nav.is-open ul li:nth-child(3){transition-delay:.12s;}
  .main-nav.is-open ul li:nth-child(4){transition-delay:.16s;}
  .main-nav ul li a{
    height:56px;width:100%;justify-content:space-between;padding:0 6px;
    border-bottom:1px solid var(--line-2);font-size:16px;
  }
  .main-nav ul li a::after{display:none;}
  .main-nav ul li a.is-active{color:var(--brand);}
  .nav-cta{
    position:fixed;left:24px;right:24px;bottom:24px;margin:0;width:calc(100% - 48px);
  }
  .step-row{grid-template-columns:72px 1fr;gap:18px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media screen and (max-width:639px){
  .site-container{padding:0 16px;}
  .section{padding:56px 0;}
  .page-hero{padding:118px 0 52px;}
  .section-head{margin-bottom:36px;}
  .topic-body{padding:22px 20px 24px;}
  .step-row{grid-template-columns:1fr;gap:10px;}
  .step-no{font-size:28px;}
  .notice-bar{padding:20px;flex-direction:column;gap:14px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
  .brand-text{font-size:15.5px;}
}
@media screen and (max-width:480px){
  .hero-tags .chip{height:32px;font-size:12.5px;padding:0 12px;}
  .back-to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;}
  html{scroll-behavior:auto;}
}