/* roulang page: index */
:root{
  --bg-0:#070C14;--bg-1:#0B1420;--bg-2:#101B2B;
  --line:rgba(140,175,220,.16);--line-strong:rgba(140,175,220,.3);
  --glass:rgba(18,30,48,.55);--glass-hi:rgba(255,255,255,.06);
  --brand-500:#3D7BFF;--brand-400:#6FA0FF;--brand-700:#1E4FC4;
  --accent-500:#FFB25A;--accent-600:#E8952F;
  --ok:#37D67A;--warn:#FF6B6B;
  --text-1:#EAF1FA;--text-2:#A9BACF;--text-3:#6F8299;
  --r-card:16px;--r-btn:999px;--r-input:12px;--r-img:14px;
  --shadow-card:0 18px 48px rgba(3,8,18,.55);
  --shadow-brand:0 12px 32px rgba(61,123,255,.35);
  --shadow-accent:0 12px 32px rgba(232,149,47,.32);
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg-0);color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;line-height:1.85;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease}
a:focus-visible,button:focus-visible,.faq-q:focus-visible{outline:2px solid #fff;outline-offset:3px;border-radius:8px}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.num,.mono,time,.price-num,.stat-num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.wrap{max-width:1280px}}
.section{padding:104px 0;position:relative}
.section::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent)}
.section--tint{background:var(--bg-1)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;color:var(--brand-400);letter-spacing:.08em;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand-500)}
.h2{font-size:clamp(22px,3vw,32px);margin-bottom:14px}
.lead{color:var(--text-2);max-width:720px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:44px;flex-wrap:wrap}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 26px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,background .2s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--brand-500),var(--brand-700));color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(61,123,255,.5);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:rgba(255,178,90,.1);border-color:var(--accent-500);color:var(--accent-500);box-shadow:var(--shadow-accent)}
.btn-accent:hover{transform:translateY(-2px);background:rgba(255,178,90,.18);box-shadow:0 16px 40px rgba(232,149,47,.45);color:var(--accent-500)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand-400);color:var(--brand-400);transform:translateY(-2px)}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}

/* ============ 头部导航 ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;border-bottom:1px solid transparent}
.site-header.is-scrolled{background:rgba(7,12,20,.82);backdrop-filter:blur(14px) saturate(140%);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:76px}
.brand-lock{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:17px;font-weight:700;color:var(--text-1)}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.04em}
.nav-main{display:flex;align-items:center;gap:6px}
.nav-link{position:relative;padding:10px 14px;font-size:15px;color:var(--text-2);border-radius:10px}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--brand-500);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:12px}
.burger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.03);cursor:pointer;padding:0;position:relative}
.burger span{position:absolute;left:12px;right:12px;height:2px;background:var(--text-1);border-radius:2px;transition:.25s ease}
.burger span:nth-child(1){top:15px}.burger span:nth-child(2){top:21px}.burger span:nth-child(3){top:27px}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.drawer,.drawer-mask{display:none}
@media (max-width:1023px){
  .nav-main,.header-actions{display:none}
  .burger{display:block}
  .drawer-mask{display:block;position:fixed;inset:0;background:rgba(3,7,14,.6);opacity:0;visibility:hidden;transition:.25s ease;z-index:70}
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{display:flex;flex-direction:column;position:fixed;top:0;right:0;bottom:0;width:min(84vw,360px);background:var(--bg-1);border-left:1px solid var(--line);z-index:80;transform:translateX(100%);transition:transform .3s ease;padding:26px 22px}
  .drawer.is-open{transform:translateX(0)}
  .drawer-title{font-size:13px;color:var(--text-3);margin-bottom:16px}
  .drawer .nav-link{display:flex;align-items:center;min-height:48px;font-size:16px;border-radius:12px;border:1px solid transparent}
  .drawer .nav-link.is-active{border-color:var(--line);background:rgba(255,255,255,.04)}
  .drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
}

/* ============ Hero ============ */
.hero{position:relative;padding:150px 0 0;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-image:url(/assets/images/backpic/back-1.png);background-size:cover;background-position:center;opacity:.34}
.hero-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 90% at 12% 18%,rgba(7,12,20,.35),rgba(7,12,20,.97) 68%)}
.hero-glow{position:absolute;right:-80px;bottom:-120px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(61,123,255,.35),transparent 66%);opacity:.32;pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding-bottom:76px}
.tagline{display:inline-flex;align-items:center;gap:10px;padding:7px 16px;border-radius:var(--r-btn);border:1px solid var(--line);background:var(--glass);font-size:13px;color:var(--text-2);margin-bottom:22px}
.tagline i{color:var(--accent-500)}
.hero h1{font-size:clamp(30px,5vw,52px);margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand-400)}
.hero-sub{color:var(--text-2);font-size:17px;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{border-radius:var(--r-card);border:1px solid var(--line);box-shadow:var(--shadow-card);width:100%;aspect-ratio:16/11;object-fit:cover}
.glass-note{
  position:absolute;left:-26px;bottom:-30px;width:min(320px,90%);
  background:var(--glass);backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r-card);padding:20px;
  box-shadow:var(--shadow-card);
}
.glass-note::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:var(--glass-hi)}
.glass-note li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);padding:7px 0}
.glass-note li i{color:var(--ok);margin-top:6px;font-size:12px}
.trustbar{position:relative;border-top:1px solid var(--line);background:rgba(11,20,32,.6)}
.trustbar ul{display:grid;grid-template-columns:repeat(4,1fr)}
.trustbar li{padding:26px 24px;text-align:center;position:relative}
.trustbar li+li::before{content:"";position:absolute;left:0;top:26px;bottom:26px;width:1px;background:var(--line)}
.stat-num{display:block;font-size:24px;font-weight:700;color:var(--text-1)}
.stat-label{font-size:13px;color:var(--text-3)}

/* ============ 价值主张 ============ */
.prop-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.prop-copy p{color:var(--text-2);margin-bottom:26px}
.step-list{border-top:1px solid var(--line)}
.step-list li{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);align-items:baseline}
.step-list .idx{font-family:var(--mono);font-size:13px;color:var(--brand-400);min-width:28px}
.step-list strong{display:block;font-size:16px}
.step-list span{font-size:14px;color:var(--text-3)}
.matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.m-card{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;position:relative;box-shadow:var(--shadow-card);backdrop-filter:blur(14px) saturate(140%)}
.m-card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:var(--glass-hi)}
.m-card:nth-child(2){transform:translateY(22px)}
.m-card:nth-child(4){transform:translateY(22px)}
.m-card h3{font-size:18px;margin-bottom:8px}
.m-card p{font-size:14px;color:var(--text-2)}
.m-card .kpi{display:block;font-family:var(--mono);font-size:22px;color:var(--brand-400);margin-bottom:6px}
@media (max-width:1023px){.matrix .m-card{transform:none !important}}

/* ============ 功能分组 ============ */
.fgroup{padding:34px 0;border-top:1px solid var(--line)}
.fgroup:last-child{border-bottom:1px solid var(--line)}
.fgroup-head{display:grid;grid-template-columns:.9fr 1.6fr;gap:32px;align-items:start;margin-bottom:22px}
.fgroup-head h3{font-size:20px}
.fgroup-head p{font-size:14px;color:var(--text-3)}
.fitems{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.fitem{display:flex;gap:14px;padding:18px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2)}
.fitem .ico{flex:0 0 40px;height:40px;border-radius:12px;display:grid;place-items:center;background:rgba(61,123,255,.14);color:var(--brand-400);font-size:15px}
.fitem h4{font-size:16px;margin-bottom:4px}
.fitem p{font-size:13.5px;color:var(--text-3)}

/* ============ 场景轨道 ============ */
.track{position:relative;margin-top:20px}
.track::before{content:"";position:absolute;left:0;right:0;top:9px;height:1px;background:var(--line)}
.track-row{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.node{position:relative;padding-top:36px}
.node::before{content:"";position:absolute;top:2px;left:0;width:16px;height:16px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 6px rgba(61,123,255,.18),0 0 18px rgba(61,123,255,.7)}
.node.up{padding-top:0;padding-bottom:36px}
.node.up::before{top:auto;bottom:2px}
.node h3{font-size:17px;margin-bottom:8px}
.node p{font-size:14px;color:var(--text-2)}

/* ============ 案例 ============ */
.case-main{display:grid;grid-template-columns:1.15fr .85fr;gap:0;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--glass);box-shadow:var(--shadow-card)}
.case-main img{height:100%;object-fit:cover;border-radius:0;min-height:300px}
.case-body{padding:36px;display:flex;flex-direction:column;justify-content:center;gap:18px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:var(--r-btn);font-size:12px;border:1px solid rgba(255,178,90,.4);background:rgba(255,178,90,.1);color:var(--accent-500);width:max-content}
.quote{border-left:3px solid var(--brand-500);padding-left:18px;font-size:17px;font-weight:500;color:var(--text-1)}
.case-metrics{display:flex;gap:36px;flex-wrap:wrap}
.case-metrics span{display:block;font-family:var(--mono);font-size:20px;color:var(--brand-400)}
.case-metrics small{font-size:13px;color:var(--text-3)}
.case-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:20px}
.mini-card{border:1px solid var(--line);border-radius:var(--r-card);padding:22px;background:var(--bg-2);transition:.25s ease}
.mini-card:hover{transform:translateY(-3px);border-color:rgba(61,123,255,.45);box-shadow:var(--shadow-card)}
.mini-card h4{font-size:16px;margin-bottom:8px}
.mini-card p{font-size:14px;color:var(--text-3)}

/* ============ 价格 ============ */
.price-row{margin:0 -12px}
.price-col{padding:0 12px 24px}
.price-card{position:relative;height:100%;background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);padding:30px 26px;display:flex;flex-direction:column;gap:18px;backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow-card)}
.price-card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:var(--glass-hi)}
.price-card.is-featured{border-color:var(--accent-500);transform:scale(1.04);z-index:2}
.price-card.is-featured .badge-rec{position:absolute;top:-14px;left:26px;padding:5px 16px;border-radius:var(--r-btn);background:var(--accent-500);color:#1A1200;font-size:12px;font-weight:700}
.price-title{font-size:18px}
.price-num{font-size:36px;font-weight:700;color:var(--text-1)}
.price-num small{font-size:14px;color:var(--text-3);font-weight:400}
.price-card ul{display:flex;flex-direction:column;gap:10px;font-size:14.5px;color:var(--text-2)}
.price-card ul li{display:flex;gap:10px;align-items:flex-start}
.price-card ul li i{color:var(--ok);font-size:12px;margin-top:7px}
.price-card ul li.off{color:var(--text-3);text-decoration:line-through}
.price-card ul li.off i{color:var(--text-3)}
.price-card .btn{margin-top:auto}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:.25s ease;height:100%}
.news-card:hover{transform:translateY(-3px);border-color:rgba(61,123,255,.45)}
.news-cover{aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#132741,#0B1420);display:grid;place-items:center}
.news-cover img{width:100%;height:100%;object-fit:cover;border-radius:0}
.news-cover span{font-size:26px;color:var(--brand-400);font-family:var(--mono)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-title{font-size:18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--text-3);border-top:1px solid var(--line);padding-top:14px}
.empty-state{grid-column:1/-1;border:1px dashed var(--line-strong);border-radius:var(--r-card);padding:56px 24px;text-align:center;color:var(--text-3)}
.empty-state i{font-size:26px;display:block;margin-bottom:12px;color:var(--brand-400)}

/* ============ FAQ ============ */
.faq{max-width:920px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--glass);margin-bottom:14px;overflow:hidden;transition:border-color .2s ease}
.faq-item.is-open{border-color:rgba(61,123,255,.45)}
.faq-q{display:flex;align-items:center;gap:16px;width:100%;min-height:48px;padding:16px 22px;background:none;border:0;color:var(--text-1);font-size:16px;font-weight:600;text-align:left;cursor:pointer;font-family:inherit}
.faq-q .qmark{flex:0 0 26px;height:26px;border-radius:8px;display:grid;place-items:center;background:rgba(61,123,255,.16);color:var(--brand-400);font-size:13px}
.faq-q .plus{margin-left:auto;color:var(--text-3);transition:transform .2s ease;font-size:14px}
.faq-item.is-open .plus{transform:rotate(45deg);color:var(--brand-400)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease}
.faq-a p{padding:0 22px 20px 64px;font-size:15px;color:var(--text-2)}

/* ============ CTA 条 ============ */
.cta-band{position:relative;overflow:hidden;background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band::after{content:"";position:absolute;left:-140px;top:-160px;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(61,123,255,.32),transparent 65%);opacity:.35;pointer-events:none}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:64px 0;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,3vw,30px);margin-bottom:10px}
.cta-inner p{color:var(--text-2);max-width:600px}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-0);padding:72px 0 26px;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.footer-grid h4{font-size:15px;margin-bottom:16px;color:var(--text-1)}
.footer-grid p,.footer-grid a{font-size:14px;color:var(--text-3)}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a:hover{color:var(--brand-400)}
.footer-logo{font-size:18px;font-weight:700;color:var(--text-1);margin-bottom:14px}
.footer-sub{font-size:12px;color:var(--brand-400);margin-bottom:16px;letter-spacing:.04em}
.copyright{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}

/* ============ 返回顶部 ============ */
.to-top{position:fixed;right:20px;bottom:24px;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--glass);color:var(--text-1);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transition:.25s ease;z-index:50;backdrop-filter:blur(14px)}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--brand-400);color:var(--brand-400)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .fitems{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding-top:118px}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding-bottom:56px}
  .glass-note{position:static;width:100%;margin-top:18px}
  .prop-grid{grid-template-columns:1fr;gap:36px}
  .fgroup-head{grid-template-columns:1fr;gap:12px}
  .track-row{grid-template-columns:repeat(2,1fr);gap:28px}
  .track::before{display:none}
  .node,.node.up{padding:0 0 0 26px}
  .node::before,.node.up::before{top:6px;bottom:auto;left:0}
  .case-main{grid-template-columns:1fr}
  .case-mini{grid-template-columns:1fr}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .price-card.is-featured{transform:none}
}
@media (max-width:767px){
  body{font-size:16px}
  .wrap{padding:0 18px}
  .section{padding:56px 0}
  .trustbar ul{grid-template-columns:repeat(2,1fr)}
  .trustbar li+li::before{display:none}
  .trustbar li{border-top:1px solid var(--line);padding:20px 14px}
  .fitems{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .matrix{grid-template-columns:1fr}
  .track-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .cta-inner{padding:52px 0}
  .hero-actions .btn{width:100%}
  .faq-q{font-size:15px;padding:14px 16px}
  .faq-a p{padding:0 16px 18px 56px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: article */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1420;
  --bg-2:#101B2B;
  --line:rgba(140,175,220,.16);
  --line-strong:rgba(140,175,220,.34);
  --glass:rgba(18,30,48,.55);
  --glass-hi:rgba(255,255,255,.06);
  --brand-500:#3D7BFF;
  --brand-400:#6FA0FF;
  --brand-700:#1E4FC4;
  --accent-500:#FFB25A;
  --accent-600:#E8952F;
  --ok:#37D67A;
  --warn:#FF6B6B;
  --text-1:#EAF1FA;
  --text-2:#A9BACF;
  --text-3:#6F8299;
  --radius-card:16px;
  --radius-btn:999px;
  --radius-input:12px;
  --radius-img:14px;
  --shadow-card:0 18px 48px rgba(3,8,18,.55);
  --shadow-btn:0 12px 32px rgba(61,123,255,.35);
  --shadow-accent:0 12px 32px rgba(232,149,47,.32);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --wrap-wide:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand-400);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:#9CC0FF;}
p{margin:0 0 1.1em;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:-.01em;}
ul,ol{margin:0 0 1.1em;padding-left:1.35em;}
li{margin:.35em 0;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid #fff;outline-offset:2px;border-radius:6px;}
::selection{background:rgba(61,123,255,.4);color:#fff;}

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

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .2s var(--ease);
}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.14),var(--shadow-btn);
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 16px 38px rgba(61,123,255,.5);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:rgba(255,255,255,.02);
  border-color:var(--line);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:var(--brand-400);color:#fff;transform:translateY(-2px);}
.btn-accent{
  background:rgba(255,178,90,.06);
  border-color:rgba(255,178,90,.6);
  color:var(--accent-500);
  box-shadow:inset 0 0 0 1px rgba(255,178,90,.08),var(--shadow-accent);
}
.btn-accent:hover{background:rgba(255,178,90,.14);color:#FFD3A1;transform:translateY(-2px);}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--glass);
  font-size:12px;
  line-height:1.5;
  color:var(--text-2);
  white-space:nowrap;
}
.badge-accent{border-color:rgba(255,178,90,.4);background:rgba(255,178,90,.1);color:var(--accent-500);}
.badge-brand{border-color:rgba(111,160,255,.4);background:rgba(61,123,255,.12);color:var(--brand-400);}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  padding:14px 0;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),padding .3s var(--ease),backdrop-filter .3s var(--ease);
}
.site-header.is-scrolled{
  padding:10px 0;
  background:rgba(7,12,20,.86);
  border-bottom-color:var(--line);
  backdrop-filter:blur(14px) saturate(140%);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
}
.brand-lock{
  display:flex;
  flex-direction:column;
  gap:2px;
  flex-shrink:0;
  color:var(--text-1);
}
.brand-name{font-size:19px;font-weight:700;letter-spacing:-.01em;line-height:1.25;}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.06em;line-height:1.3;}
.brand-lock:hover .brand-name{color:#fff;}
.nav-main{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  padding:10px 14px;
  border-radius:10px;
  font-size:15px;
  color:var(--text-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand-400),var(--brand-700));
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--glass);
  padding:0;
  position:relative;
}
.burger span{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  border-radius:2px;
  background:var(--text-1);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.burger span:nth-child(1){top:15px;}
.burger span:nth-child(2){top:21px;}
.burger span:nth-child(3){top:27px;}
body.nav-open .burger span:nth-child(1){transform:translateY(6px) rotate(45deg);}
body.nav-open .burger span:nth-child(2){opacity:0;}
body.nav-open .burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-mask{
  position:fixed;
  inset:0;
  background:rgba(4,8,14,.7);
  backdrop-filter:blur(3px);
  opacity:0;
  pointer-events:none;
  transition:opacity .25s var(--ease);
  z-index:55;
}
body.nav-open .nav-mask{opacity:1;pointer-events:auto;}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  padding:132px 0 52px;
  background:
    linear-gradient(180deg,rgba(7,12,20,.72) 0%,rgba(7,12,20,.88) 55%,var(--bg-0) 100%),
    radial-gradient(900px 420px at 88% 22%,rgba(61,123,255,.28),transparent 70%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:var(--text-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand-400);}
.breadcrumb .sep{color:rgba(140,175,220,.4);}
.breadcrumb .current{color:var(--text-1);}
.article-hero h1{
  font-size:clamp(28px,4.4vw,46px);
  max-width:920px;
  margin-bottom:22px;
}
.meta-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  font-size:13px;
  color:var(--text-2);
}
.meta-bar time,.meta-bar .num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--text-1);}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}

/* ============ 正文布局 ============ */
.article-shell{
  padding:64px 0 96px;
  background:
    radial-gradient(700px 340px at 12% 0%,rgba(30,79,196,.16),transparent 68%),
    var(--bg-0);
}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 328px;
  gap:56px;
  align-items:start;
}
.article-main{min-width:0;}
.article-body{
  max-width:760px;
  font-size:17px;
  color:var(--text-2);
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  position:relative;
  margin:52px 0 18px;
  padding-left:18px;
  font-size:clamp(21px,2.4vw,28px);
  color:var(--text-1);
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.22em;
  width:4px;height:1.05em;
  border-radius:3px;
  background:linear-gradient(180deg,var(--brand-400),var(--brand-700));
}
.article-body h3{
  margin:34px 0 12px;
  font-size:20px;
  color:var(--text-1);
}
.article-body h4{margin:26px 0 10px;font-size:17px;color:var(--text-1);}
.article-body p{color:var(--text-2);margin:0 0 1.25em;}
.article-body strong{color:var(--text-1);font-weight:600;}
.article-body a{color:var(--brand-400);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.article-body a:hover{color:#B7D1FF;}
.article-body ul,.article-body ol{
  background:linear-gradient(180deg,rgba(16,27,43,.66),rgba(11,20,32,.5));
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px 22px 18px 42px;
  margin:0 0 1.5em;
}
.article-body li{margin:.45em 0;}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  border-left:3px solid var(--brand-500);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  background:var(--glass);
  color:var(--text-1);
  font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  margin:26px auto;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
}
.article-body figure{margin:26px 0;}
.article-body figcaption{
  margin-top:10px;
  font-size:12.5px;
  color:var(--text-3);
  text-align:center;
}
.article-body table{
  display:block;
  width:100%;
  overflow-x:auto;
  margin:24px 0;
  border-collapse:collapse;
  font-size:15px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
}
.article-body thead{background:rgba(61,123,255,.14);}
.article-body th,.article-body td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  text-align:left;
  white-space:nowrap;
}
.article-body tbody tr:nth-child(even){background:rgba(16,27,43,.6);}
.article-body code{
  font-family:var(--font-mono);
  font-size:14px;
  padding:2px 6px;
  border-radius:6px;
  background:rgba(16,27,43,.9);
  border:1px solid var(--line);
  color:#C9DCFF;
}
.article-body pre{
  margin:24px 0;
  padding:18px 20px;
  overflow-x:auto;
  border-radius:var(--radius-card);
  background:#060B13;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:14px;
  line-height:1.75;
  color:#D5E3F7;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit;}
.article-body hr{margin:38px 0;border:0;border-top:1px solid var(--line);}

.empty-state{
  max-width:760px;
  padding:48px 32px;
  text-align:center;
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);
  background:var(--glass);
}
.empty-state .ico{
  width:56px;height:56px;
  margin:0 auto 18px;
  border-radius:16px;
  border:1px solid var(--line);
  background:rgba(61,123,255,.12);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-400);
  font-size:22px;
  font-weight:700;
}
.empty-state h2{font-size:20px;color:var(--text-1);margin-bottom:10px;}
.empty-state p{color:var(--text-2);margin-bottom:22px;}

/* ============ 侧栏 ============ */
.article-side{
  position:sticky;
  top:104px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.side-card{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--glass);
  box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow-card);
  padding:22px;
  backdrop-filter:blur(14px) saturate(140%);
}
.side-card h3{
  font-size:15px;
  color:var(--text-1);
  letter-spacing:.04em;
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h3::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent-500);
  box-shadow:0 0 10px rgba(255,178,90,.8);
}
.toc-list{list-style:none;margin:0;padding:0;counter-reset:toc;}
.toc-list li{margin:0;}
.toc-list a{
  display:flex;
  gap:10px;
  padding:9px 10px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-2);
  border-left:2px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a::before{
  counter-increment:toc;
  content:counter(toc,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-3);
  padding-top:3px;
}
.toc-list a:hover,
.toc-list a.is-current{
  background:rgba(255,255,255,.05);
  border-left-color:var(--brand-500);
  color:#fff;
}
.toc-empty{font-size:13.5px;color:var(--text-3);margin:0;}
.side-rel{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;}
.side-rel li{padding-bottom:14px;border-bottom:1px solid var(--line);}
.side-rel li:last-child{border-bottom:0;padding-bottom:0;}
.side-rel a{display:block;font-size:14.5px;color:var(--text-1);line-height:1.6;}
.side-rel a:hover{color:var(--brand-400);}
.side-rel span{display:block;margin-top:6px;font-size:12px;color:var(--text-3);font-family:var(--font-mono);}

/* ============ 上下篇 / 相关 ============ */
.section-block{padding:0 0 88px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:28px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.section-head h2{font-size:clamp(21px,2.6vw,29px);color:var(--text-1);}
.section-head p{margin:8px 0 0;font-size:14.5px;color:var(--text-3);max-width:620px;}
.prevnext{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.pn-card{
  display:block;
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--glass);
  box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow-card);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.pn-card:hover{transform:translateY(-3px);border-color:rgba(111,160,255,.4);box-shadow:inset 0 1px 0 var(--glass-hi),0 24px 54px rgba(3,8,18,.7);}
.pn-card .kicker{font-size:12px;color:var(--accent-500);letter-spacing:.08em;font-family:var(--font-mono);}
.pn-card h3{margin:10px 0 8px;font-size:18px;color:var(--text-1);}
.pn-card p{margin:0;font-size:14px;color:var(--text-3);}
.pn-card.next{text-align:right;}

.rel-grid{margin-bottom:0;}
.rel-card{
  height:100%;
  display:flex;
  flex-direction:column;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--glass);
  box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow-card);
  overflow:hidden;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(111,160,255,.4);box-shadow:inset 0 1px 0 var(--glass-hi),0 26px 56px rgba(3,8,18,.72);}
.rel-thumb{
  aspect-ratio:16/9;
  width:100%;
  object-fit:cover;
  border-radius:0;
  border-bottom:1px solid var(--line);
}
.rel-inner{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.rel-inner h3{font-size:17.5px;color:var(--text-1);line-height:1.55;}
.rel-inner h3 a{color:inherit;}
.rel-inner h3 a:hover{color:var(--brand-400);}
.rel-inner p{margin:0;font-size:14px;color:var(--text-3);}
.rel-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:12px;
  color:var(--text-3);
  font-family:var(--font-mono);
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:22px;
  background:
    radial-gradient(520px 240px at 92% 50%,rgba(255,178,90,.22),transparent 66%),
    radial-gradient(460px 220px at 6% 20%,rgba(61,123,255,.22),transparent 70%),
    var(--bg-1);
  padding:44px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow-card);
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:12px;}
.cta-band p{margin:0;color:var(--text-2);font-size:15px;max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0;}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--bg-1),var(--bg-0));
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
.footer-logo{font-size:18px;font-weight:700;color:var(--text-1);}
.footer-sub{font-size:12px;color:var(--text-3);letter-spacing:.06em;margin:6px 0 16px;}
.site-footer p{margin:0;font-size:14px;color:var(--text-3);max-width:340px;}
.site-footer h4{
  font-size:13.5px;
  color:var(--text-1);
  letter-spacing:.06em;
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a,.footer-links span{font-size:14px;color:var(--text-3);}
.footer-links a:hover{color:var(--brand-400);}
.copyright{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:22px;
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-mono);
}

/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;
  right:22px;bottom:24px;
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  color:var(--text-1);
  font-size:16px;
  display:flex;align-items:center;justify-content:center;
  opacity:0;
  pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease);
  z-index:50;
}
.back-top.is-show{opacity:1;pointer-events:auto;}
.back-top:hover{transform:translateY(-3px);border-color:var(--brand-400);}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  background:var(--brand-700);
  color:#fff;
  padding:10px 16px;
  border-radius:0 0 12px 0;
  z-index:99;
}
.skip-link:focus{left:0;color:#fff;}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .article-layout{grid-template-columns:minmax(0,1fr) 292px;gap:38px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:1023px){
  .nav-main{
    position:fixed;
    top:0;right:0;bottom:0;
    width:min(320px,86vw);
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:96px 20px 28px;
    background:rgba(9,16,27,.97);
    border-left:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .3s var(--ease);
    overflow-y:auto;
    z-index:58;
  }
  body.nav-open .nav-main{transform:none;}
  .nav-link{padding:14px 16px;font-size:16px;min-height:44px;display:flex;align-items:center;}
  .nav-link.is-active::after{left:16px;right:auto;width:22px;bottom:6px;}
  .burger{display:block;margin-left:auto;}
  .header-actions .btn-ghost{display:none;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:34px;}
  .article-side{position:static;}
  .side-card{backdrop-filter:none;background:var(--bg-2);}
  .article-body{max-width:none;font-size:16.5px;}
  .article-shell{padding:48px 0 72px;}
  .prevnext{grid-template-columns:minmax(0,1fr);}
  .pn-card.next{text-align:left;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .wrap{padding:0 18px;}
  .article-hero{padding:110px 0 40px;}
  .article-hero h1{font-size:clamp(24px,7vw,32px);}
  .meta-bar{gap:10px;font-size:12.5px;}
  .article-shell{padding:36px 0 60px;}
  .article-body h2{margin-top:42px;padding-left:14px;}
  .article-body ul,.article-body ol{padding:16px 18px 16px 34px;}
  .section-block{padding-bottom:64px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .copyright{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;}
  .back-top{right:14px;bottom:16px;width:42px;height:42px;}
}

/* roulang page: category1 */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1420;
  --bg-2:#101B2B;
  --line:rgba(140,175,220,.16);
  --glass:rgba(18,30,48,.55);
  --glass-hi:rgba(255,255,255,.06);
  --brand-500:#3D7BFF;
  --brand-400:#6FA0FF;
  --brand-700:#1E4FC4;
  --accent-500:#FFB25A;
  --accent-600:#E8952F;
  --ok:#37D67A;
  --warn:#FF6B6B;
  --text-1:#EAF1FA;
  --text-2:#A9BACF;
  --text-3:#6F8299;
  --radius-card:16px;
  --radius-img:14px;
  --radius-input:12px;
  --shadow-card:0 18px 48px rgba(3,8,18,.55);
  --shadow-hi:inset 0 1px 0 rgba(255,255,255,.06);
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-locked{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--text-1)}
p{margin:0 0 18px}
ul,ol{margin:0 0 20px}
:focus-visible{outline:2px solid #fff;outline-offset:3px;border-radius:8px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.wrap{max-width:1280px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(7,12,20,.86);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:22px;height:var(--header-h)}
.brand-lock{display:flex;flex-direction:column;line-height:1.3;flex-shrink:0}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.2px}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.3px}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;border-radius:999px;font-size:15px;color:var(--text-2);
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text-1);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  border-radius:2px;background:var(--brand-500);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-mobile-cta{display:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:12px 24px;font-size:15px;font-weight:600;
  transition:transform .18s ease,box-shadow .25s ease,border-color .2s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  color:#fff;
  box-shadow:var(--shadow-hi),0 12px 32px rgba(61,123,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hi),0 16px 40px rgba(61,123,255,.5)}
.btn-primary:active{transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:rgba(61,123,255,.6);background:rgba(61,123,255,.1)}
.btn-accent{
  background:rgba(255,178,90,.06);
  border:1px solid rgba(255,178,90,.55);
  color:var(--accent-500);
  box-shadow:0 10px 28px rgba(232,149,47,.2);
}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(232,149,47,.34)}
.btn.is-current{background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-3);cursor:default;box-shadow:none;transform:none}

.burger{
  display:none;margin-left:auto;width:44px;height:44px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.03);
}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .25s ease,opacity .2s ease}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mask{
  position:fixed;inset:0;z-index:80;background:rgba(3,7,14,.66);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.nav-mask.is-open{opacity:1;visibility:visible}

/* ============ 频道条 ============ */
.channel-bar{
  position:sticky;top:var(--header-h);z-index:70;
  background:rgba(7,12,20,.9);
  backdrop-filter:blur(12px) saturate(140%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.channel-inner{display:flex;align-items:center;gap:10px;height:56px;overflow-x:auto}
.channel-inner::-webkit-scrollbar{display:none}
.channel-label{font-size:12px;letter-spacing:.18em;color:var(--text-3);flex-shrink:0;padding-right:4px}
.channel-link{
  padding:8px 18px;border-radius:999px;border:1px solid transparent;
  font-size:14px;color:var(--text-2);white-space:nowrap;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.channel-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.channel-link.is-current{color:var(--text-1);border-color:rgba(61,123,255,.5);background:rgba(61,123,255,.13)}

/* ============ 分类首屏 ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:64px 0 76px;
  background-color:var(--bg-1);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center right;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,12,20,.97) 0%,rgba(7,12,20,.9) 46%,rgba(7,12,20,.55) 100%);
}
.cat-hero::after{
  content:"";position:absolute;right:-140px;bottom:-180px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(61,123,255,.3),transparent 62%);pointer-events:none;
}
.cat-hero .wrap{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--text-3);margin-bottom:20px}
.crumbs a{transition:color .2s ease}
.crumbs a:hover{color:var(--brand-400)}
.crumbs .current{color:var(--text-2)}
.cat-hero h1{font-size:clamp(30px,5vw,48px);letter-spacing:-.5px;margin-bottom:18px}
.cat-lead{max-width:720px;color:var(--text-2);margin-bottom:26px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text-2);
}
.chip i{color:var(--brand-400);font-size:12px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 双栏主体 ============ */
.cat-layout{
  display:grid;grid-template-columns:260px minmax(0,1fr);gap:56px;
  padding-top:72px;padding-bottom:40px;
}
.toc-card{
  position:sticky;top:158px;
  padding:22px 18px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-hi);
  backdrop-filter:blur(14px) saturate(140%);
}
.toc-title{
  display:block;font-size:12px;letter-spacing:.18em;color:var(--text-3);
  margin-bottom:14px;cursor:default;list-style:none;
}
.toc-title::-webkit-details-marker{display:none}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:flex;gap:10px;align-items:baseline;
  padding:9px 12px;border-radius:10px;border-left:2px solid transparent;
  font-size:14.5px;color:var(--text-2);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.toc-list a:hover{background:rgba(255,255,255,.05);color:var(--text-1)}
.toc-list a.is-active{color:var(--text-1);border-left-color:var(--brand-500);background:rgba(61,123,255,.12)}
.toc-list .toc-idx{font-family:var(--mono);font-size:12px;color:var(--text-3);flex-shrink:0}
.toc-foot{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.content-col{max-width:760px}

.sec-block{margin-bottom:66px;scroll-margin-top:160px}
.sec-head{display:flex;gap:14px;align-items:baseline;margin-bottom:20px}
.sec-num{font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--accent-500);flex-shrink:0}
.sec-title{font-size:clamp(22px,3vw,30px)}
.sec-sub{color:var(--text-3);font-size:14px;margin-top:-8px}

.list-check{list-style:none;padding:0;display:grid;gap:14px;margin:0 0 22px}
.list-check li{position:relative;padding-left:28px;color:var(--text-2)}
.list-check li::before{
  content:"";position:absolute;left:5px;top:12px;width:8px;height:8px;border-radius:2px;
  background:var(--brand-500);box-shadow:0 0 0 4px rgba(61,123,255,.14);
}
.list-check strong{color:var(--text-1);font-weight:600}

.list-step{list-style:none;padding:0;counter-reset:st;display:grid;gap:16px;margin:0 0 22px}
.list-step li{position:relative;padding-left:46px;color:var(--text-2)}
.list-step li::before{
  counter-increment:st;content:counter(st,decimal-leading-zero);
  position:absolute;left:0;top:2px;
  font-family:var(--mono);font-size:13px;color:var(--brand-400);
  width:32px;height:26px;display:grid;place-items:center;
  border-radius:8px;background:rgba(61,123,255,.13);border:1px solid rgba(61,123,255,.24);
}

.meta-list{display:grid;margin:0 0 22px;border-top:1px solid var(--line)}
.meta-row{
  display:flex;justify-content:space-between;gap:18px;align-items:baseline;
  padding:14px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-2);
}
.meta-row .val{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--text-1);text-align:right}

.tip-card{
  margin:26px 0;padding:18px 22px;border-radius:14px;
  border:1px solid rgba(255,178,90,.32);border-left:3px solid var(--accent-500);
  background:rgba(255,178,90,.08);color:var(--text-1);font-size:14.5px;
}
.tip-card i{color:var(--accent-500);margin-right:8px}

figure.pic{
  margin:30px 0;border-radius:var(--radius-img);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
}
figure.pic img{width:100%;aspect-ratio:16/9;object-fit:cover}
figure.pic figcaption{padding:11px 16px;font-size:12.5px;color:var(--text-3);background:var(--bg-2);border-top:1px solid var(--line)}

.conclusion{
  padding:28px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-hi);
  backdrop-filter:blur(14px) saturate(140%);
}
.conclusion h3{font-size:19px;margin-bottom:12px}
.conclusion p{margin:0;color:var(--text-2)}

/* ============ 场景轨道 ============ */
.band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-1);padding:72px 0;
}
.band-head{max-width:720px;margin-bottom:44px}
.band-head h2{font-size:clamp(22px,3vw,32px);margin-bottom:12px}
.band-head p{color:var(--text-2);margin:0}
.track{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.track::before{
  content:"";position:absolute;top:11px;left:2%;right:2%;height:1px;background:var(--line);
}
.track-item{position:relative;padding-top:44px}
.track-item:nth-child(even){transform:translateY(20px)}
.track-dot{
  position:absolute;top:0;left:0;width:22px;height:22px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--brand-500);
  box-shadow:0 0 0 6px rgba(61,123,255,.14);
}
.track-item h3{font-size:17px;margin-bottom:8px}
.track-item p{margin:0;color:var(--text-2);font-size:15px}
.track-idx{
  display:block;font-family:var(--mono);font-size:12px;color:var(--text-3);
  letter-spacing:.12em;margin-bottom:8px;
}

/* ============ 步骤条 ============ */
.steps{display:grid;border-top:1px solid var(--line)}
.step{
  display:grid;grid-template-columns:62px minmax(0,1fr);gap:18px;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.step-num{font-family:var(--mono);font-size:20px;color:var(--brand-400);line-height:1.5}
.step h3{font-size:18px;margin-bottom:8px}
.step p{margin:0;color:var(--text-2);font-size:15.5px}

/* ============ 卡片 ============ */
.cards-row{margin:0 -12px}
.cards-row > .cell{padding:12px}
.card{
  height:100%;display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-hi);
  backdrop-filter:blur(14px) saturate(140%);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(61,123,255,.45);box-shadow:0 24px 56px rgba(3,8,18,.7)}
.card-media{position:relative;background:var(--bg-2)}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.card-media .badge{position:absolute;left:14px;top:14px}
.card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:18px}
.card-body p{margin:0;color:var(--text-2);font-size:15px}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px}
.card-link{font-size:14px;color:var(--brand-400);display:inline-flex;align-items:center;gap:6px}
.card-link:hover{color:var(--brand-500)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--text-2);
}
.badge-brand{border-color:rgba(61,123,255,.45);background:rgba(61,123,255,.15);color:var(--brand-400)}
.badge-accent{border-color:rgba(255,178,90,.42);background:rgba(255,178,90,.13);color:var(--accent-500)}
.time{font-family:var(--mono);font-size:13px;color:var(--text-3)}

/* ============ 常见问题 ============ */
.faq-list{display:grid;gap:12px}
.faq-item{
  border-radius:14px;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(61,123,255,.35)}
.faq-item.is-open{border-color:rgba(61,123,255,.45);background:rgba(20,34,54,.72)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  min-height:56px;padding:12px 18px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-mark{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;
  display:grid;place-items:center;font-family:var(--mono);font-size:13px;
  background:rgba(61,123,255,.16);color:var(--brand-400);
}
.faq-plus{margin-left:auto;font-size:20px;line-height:1;color:var(--text-3);transition:transform .2s ease}
.faq-item.is-open .faq-plus{transform:rotate(45deg);color:var(--brand-400)}
.faq-a{padding:0 18px 20px 58px;color:var(--text-2);font-size:15.5px;display:none}
.faq-item.is-open .faq-a{display:block}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:30px;
  padding:42px 44px;border-radius:22px;
  background:linear-gradient(120deg,var(--bg-2),var(--bg-1));
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-hi);
}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-140px;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,178,90,.22),transparent 62%);pointer-events:none;
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:10px;position:relative;z-index:1}
.cta-band p{margin:0;color:var(--text-2);position:relative;z-index:1}
.cta-band .btn{position:relative;z-index:1;flex-shrink:0}

/* ============ 页脚 ============ */
.site-footer{margin-top:96px;border-top:1px solid var(--line);background:var(--bg-1);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-logo{font-size:18px;font-weight:700}
.footer-sub{font-size:12px;color:var(--text-3);margin-bottom:14px;letter-spacing:.3px}
.footer-grid p{color:var(--text-2);font-size:14.5px;max-width:330px;margin:0}
.footer-grid h4{font-size:14px;margin-bottom:14px;color:var(--text-1)}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14.5px;color:var(--text-2)}
.footer-links a{transition:color .2s ease}
.footer-links a:hover{color:var(--brand-400)}
.copyright{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .wrap{max-width:1200px}
}
@media (max-width:1023px){
  :root{--header-h:64px}
  body{font-size:16px}
  .nav-main{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:min(86vw,360px);margin:0;padding:92px 20px 28px;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(11,20,32,.98);
    backdrop-filter:blur(16px) saturate(140%);
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .3s ease;
    overflow-y:auto;
  }
  .nav-main.is-open{transform:none}
  .nav-link{padding:14px 16px;font-size:16px;min-height:44px;border-radius:12px}
  .nav-link.is-active::after{display:none}
  .nav-link.is-active{background:rgba(61,123,255,.16)}
  .header-actions{display:none}
  .burger{display:flex}
  .nav-mobile-cta{display:flex;flex-direction:column;gap:10px;margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}
  .nav-mobile-cta .btn{width:100%}
  .cat-layout{grid-template-columns:1fr;gap:36px;padding-top:52px}
  .toc-card{position:static;padding:18px}
  .toc-title{pointer-events:auto;cursor:pointer}
  .toc-list{margin-top:12px}
  .content-col{max-width:none}
  .track{grid-template-columns:repeat(2,1fr);gap:28px}
  .track::before{display:none}
  .track-item:nth-child(even){transform:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .card,.toc-card,.faq-item,.conclusion{backdrop-filter:none;background:#101B2B}
}
@media (max-width:767px){
  .cat-hero{padding:44px 0 56px}
  .cat-hero h1{font-size:30px}
  .band{padding:56px 0}
  .sec-block{margin-bottom:52px}
  .step{grid-template-columns:48px minmax(0,1fr);gap:12px}
  .faq-a{padding:0 18px 20px 18px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 24px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:64px;padding-top:48px}
  .cat-layout{padding-bottom:16px}
}
@media (max-width:520px){
  .wrap{padding:0 18px}
  .track{grid-template-columns:1fr}
  .brand-name{font-size:15.5px}
  .brand-sub{font-size:11px}
  .hero-cta .btn{width:100%}
  .meta-row{flex-direction:column;gap:4px}
  .meta-row .val{text-align:left}
}

/* roulang page: category2 */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1420;
  --bg-2:#101B2B;
  --line:rgba(140,175,220,.16);
  --glass:rgba(18,30,48,.55);
  --glass-hi:rgba(255,255,255,.06);
  --brand-500:#3D7BFF;
  --brand-400:#6FA0FF;
  --brand-700:#1E4FC4;
  --accent-500:#FFB25A;
  --accent-600:#E8952F;
  --ok:#37D67A;
  --warn:#FF6B6B;
  --text-1:#EAF1FA;
  --text-2:#A9BACF;
  --text-3:#6F8299;
  --radius:16px;
  --radius-sm:12px;
  --pill:999px;
  --shadow:0 18px 48px rgba(3,8,18,.55);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --container:1200px;
}
*,*::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-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  padding-top:76px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden;}
h1,h2,h3,h4,h5,h6{margin:0;font-family:inherit;font-weight:700;letter-spacing:.01em;line-height:1.35;}
p{margin:0 0 1em;}
a{color:var(--brand-400);text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:var(--brand-500);}
img{max-width:100%;display:block;border-radius:14px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid #fff;outline-offset:2px;border-radius:6px;}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

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

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.scrolled{
  background:rgba(7,12,20,.82);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:76px;
}
.brand-lock{
  display:flex;
  flex-direction:column;
  gap:2px;
  text-decoration:none;
  flex:none;
}
.brand-name{
  font-size:17px;
  font-weight:700;
  color:var(--text-1);
  letter-spacing:.01em;
}
.brand-sub{
  font-size:12px;
  color:var(--text-3);
  letter-spacing:.02em;
}
.nav-main{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:10px 14px;
  border-radius:var(--pill);
  font-size:15px;
  color:var(--text-2);
  text-decoration:none;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.nav-link.is-active{color:var(--text-1);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:3px;
  height:2px;
  border-radius:2px;
  background:var(--brand-500);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  text-decoration:none;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.14),0 12px 32px rgba(61,123,255,.35);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-2px);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.2),0 16px 40px rgba(61,123,255,.5);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text-1);
}
.btn-ghost:hover{
  border-color:var(--brand-500);
  color:#fff;
  transform:translateY(-2px);
}
.btn-accent{
  background:transparent;
  border-color:var(--accent-500);
  color:var(--accent-500);
  box-shadow:0 12px 32px rgba(255,178,90,.18);
}
.btn-accent:hover{
  color:#fff;
  background:linear-gradient(135deg,var(--accent-500),var(--accent-600));
  border-color:transparent;
  transform:translateY(-2px);
  box-shadow:0 16px 40px rgba(255,178,90,.36);
}
.btn-sm{padding:9px 18px;font-size:14px;}
.burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(255,255,255,.03);
  cursor:pointer;
  padding:0;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.burger span{
  display:block;
  width:18px;height:2px;
  background:var(--text-1);
  border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
body.nav-open .burger span:nth-child(1){transform:translateY(6px) rotate(45deg);}
body.nav-open .burger span:nth-child(2){opacity:0;}
body.nav-open .burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ 频道条 ============ */
.channel-bar{
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.channel-inner{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:56px;
  flex-wrap:wrap;
}
.channel-label{
  font-size:13px;
  color:var(--text-3);
  margin-right:6px;
  letter-spacing:.04em;
}
.channel-link{
  display:inline-flex;
  align-items:center;
  padding:8px 16px;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  font-size:14px;
  color:var(--text-2);
  text-decoration:none;
  transition:border-color .18s ease,color .18s ease,background .18s ease,transform .18s ease;
}
.channel-link:hover{
  color:var(--text-1);
  border-color:var(--brand-500);
  background:rgba(61,123,255,.1);
  transform:translateY(-1px);
}
.channel-link.is-current{
  color:#fff;
  border-color:transparent;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  box-shadow:0 10px 26px rgba(61,123,255,.3);
}

/* ============ Hero ============ */
.hero{
  position:relative;
  overflow:hidden;
  padding:72px 0 64px;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;
  background-position:center right;
  opacity:.3;
  -webkit-mask-image:linear-gradient(100deg,rgba(0,0,0,.05) 0%,rgba(0,0,0,.75) 62%,rgba(0,0,0,.9) 100%);
  mask-image:linear-gradient(100deg,rgba(0,0,0,.05) 0%,rgba(0,0,0,.75) 62%,rgba(0,0,0,.9) 100%);
}
.hero::after{
  content:"";
  position:absolute;
  right:-140px;bottom:-180px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(61,123,255,.34),rgba(61,123,255,0) 68%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:900px;}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--text-3);
  margin-bottom:20px;
}
.crumb a{color:var(--text-3);text-decoration:none;}
.crumb a:hover{color:var(--brand-400);}
.crumb .sep{opacity:.6;}
.crumb .current{color:var(--text-2);}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--pill);
  border:1px solid rgba(255,178,90,.36);
  background:rgba(255,178,90,.1);
  color:var(--accent-500);
  font-size:13px;
  font-weight:600;
  letter-spacing:.03em;
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(28px,4.2vw,46px);
  font-weight:700;
  line-height:1.3;
  margin-bottom:18px;
  max-width:22em;
}
.hero-lead{
  font-size:17px;
  color:var(--text-2);
  line-height:1.9;
  max-width:720px;
  margin-bottom:28px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:36px;
}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.fact{display:flex;flex-direction:column;gap:2px;}
.fact strong{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:24px;
  font-weight:700;
  color:var(--text-1);
  line-height:1.2;
}
.fact span{font-size:13px;color:var(--text-3);}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:40px;
}
.section-title{
  font-size:clamp(22px,3vw,32px);
  font-weight:700;
  line-height:1.35;
  margin-bottom:10px;
}
.section-desc{
  font-size:16px;
  color:var(--text-2);
  max-width:720px;
  margin:0;
}
.section-eyebrow{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--brand-400);
  margin-bottom:12px;
}

/* ============ 静态分组条 ============ */
.filter-bar{
  background:var(--bg-2);
  border-bottom:1px solid var(--line);
}
.filter-inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:68px;
  flex-wrap:wrap;
  padding-top:12px;
  padding-bottom:12px;
}
.filter-label{
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.06em;
  flex:none;
}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;}
.pill{
  display:inline-flex;
  align-items:center;
  padding:7px 15px;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  font-size:13px;
  color:var(--text-2);
  cursor:default;
  user-select:none;
}
.pill.is-on{
  color:#fff;
  border-color:rgba(61,123,255,.6);
  background:rgba(61,123,255,.18);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
}
.filter-note{
  margin-left:auto;
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
}

/* ============ 卡片矩阵 ============ */
.matrix{
  display:flex;
  flex-wrap:wrap;
  margin:0 -12px;
}
.matrix .cell{
  width:100%;
  padding:0 12px 24px;
}
.fcard{
  display:flex;
  flex-direction:column;
  height:100%;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--glass-hi);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.fcard:hover{
  transform:translateY(-3px);
  border-color:rgba(61,123,255,.42);
  box-shadow:var(--shadow);
}
.fcard-media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--bg-2);
}
.fcard-media img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:0;
  transition:transform .4s ease;
}
.fcard:hover .fcard-media img{transform:scale(1.04);}
.fcard-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,0) 40%,rgba(7,12,20,.7) 100%);
}
.fcard-body{
  padding:20px 20px 14px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}
.badge{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  padding:4px 12px;
  border-radius:var(--pill);
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--text-2);
}
.badge-brand{
  border-color:rgba(61,123,255,.42);
  background:rgba(61,123,255,.14);
  color:var(--brand-400);
}
.badge-accent{
  border-color:rgba(255,178,90,.42);
  background:rgba(255,178,90,.12);
  color:var(--accent-500);
}
.fcard-body h3{
  font-size:19px;
  font-weight:600;
  line-height:1.45;
  color:var(--text-1);
}
.fcard-body p{
  margin:0;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.75;
}
.fcard-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 20px 18px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--text-3);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  margin-top:auto;
}

/* ============ 卖点分组 ============ */
.split{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
}
.split-left{flex:1 1 320px;max-width:520px;}
.split-right{flex:1 1 420px;}
.split-left h2{margin-bottom:16px;}
.split-left p{color:var(--text-2);font-size:16px;}
.point-list{
  display:flex;
  flex-direction:column;
  gap:14px;
  margin-top:24px;
}
.point{
  display:flex;
  gap:14px;
  align-items:flex-start;
}
.point-index{
  flex:none;
  width:30px;height:30px;
  border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--brand-400);
  background:rgba(61,123,255,.14);
  border:1px solid rgba(61,123,255,.3);
}
.point p{margin:0;font-size:15px;color:var(--text-2);}
.point p strong{color:var(--text-1);font-weight:600;display:block;margin-bottom:2px;}
.group-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
.group-card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--glass-hi);
  padding:24px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.group-card:hover{
  transform:translateY(-3px);
  border-color:rgba(61,123,255,.4);
  box-shadow:var(--shadow);
}
.group-card:nth-child(2){margin-top:22px;}
.group-card:nth-child(4){margin-top:22px;}
.group-icon{
  width:38px;height:38px;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(61,123,255,.28),rgba(30,79,196,.14));
  border:1px solid rgba(61,123,255,.34);
  color:var(--brand-400);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:15px;
  margin-bottom:14px;
}
.group-card h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.group-card p{margin:0;font-size:14.5px;color:var(--text-2);line-height:1.75;}

/* ============ 编号轨道 ============ */
.track{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
  position:relative;
  padding-top:16px;
}
.track::before{
  content:"";
  position:absolute;
  top:31px;left:6%;right:6%;
  height:1px;
  background:linear-gradient(90deg,rgba(140,175,220,.05),rgba(140,175,220,.28),rgba(140,175,220,.05));
}
.track-node{position:relative;padding-top:56px;}
.track-dot{
  position:absolute;
  top:20px;left:0;
  width:23px;height:23px;
  border-radius:50%;
  background:var(--bg-0);
  border:2px solid var(--brand-500);
  box-shadow:0 0 0 6px rgba(61,123,255,.14);
}
.track-node:nth-child(even){transform:translateY(22px);}
.track-node h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.track-node p{margin:0;font-size:14.5px;color:var(--text-2);line-height:1.75;}
.track-step{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--accent-500);
  letter-spacing:.1em;
  margin-bottom:8px;
}

/* ============ 流程 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.step{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
  padding:24px 22px;
  transition:border-color .22s ease,transform .22s ease;
}
.step:hover{border-color:rgba(61,123,255,.42);transform:translateY(-3px);}
.step-num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--brand-400);
  letter-spacing:.12em;
  margin-bottom:14px;
  display:block;
}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.step p{margin:0;font-size:14.5px;color:var(--text-2);line-height:1.75;}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item.open{border-color:rgba(61,123,255,.42);}
.faq-q{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  min-height:48px;
  padding:13px 20px;
  background:none;
  border:0;
  color:var(--text-1);
  font-size:16px;
  font-weight:600;
  text-align:left;
  cursor:pointer;
}
.faq-mark{
  flex:none;
  width:26px;height:26px;
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(61,123,255,.16);
  color:var(--brand-400);
  font-size:13px;
  font-weight:700;
}
.faq-plus{
  position:relative;
  margin-left:auto;
  width:16px;height:16px;
  flex:none;
  transition:transform .22s ease;
}
.faq-plus::before,
.faq-plus::after{
  content:"";
  position:absolute;
  background:var(--text-2);
  border-radius:2px;
}
.faq-plus::before{left:0;right:0;top:7px;height:2px;}
.faq-plus::after{top:0;bottom:0;left:7px;width:2px;}
.faq-item.open .faq-plus{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-item.open .faq-a{max-height:360px;}
.faq-a p{
  margin:0;
  padding:0 20px 18px 60px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.85;
}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:56px 0;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-120px;top:-160px;
  width:440px;height:440px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,178,90,.22),rgba(255,178,90,0) 70%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:8px;}
.cta-inner p{margin:0;color:var(--text-2);font-size:15.5px;max-width:640px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 分类互链 ============ */
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.rel-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
  text-decoration:none;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.rel-card:hover{
  transform:translateY(-3px);
  border-color:rgba(61,123,255,.45);
  box-shadow:var(--shadow);
}
.rel-card h3{font-size:18px;font-weight:600;color:var(--text-1);}
.rel-card p{margin:0;font-size:14.5px;color:var(--text-2);line-height:1.75;}
.rel-more{
  margin-top:auto;
  font-size:14px;
  font-weight:600;
  color:var(--brand-400);
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-0);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-logo{font-size:17px;font-weight:700;color:var(--text-1);}
.footer-sub{font-size:12px;color:var(--text-3);margin-bottom:14px;}
.site-footer p{margin:0;font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px;}
.site-footer h4{
  font-size:14px;
  font-weight:600;
  color:var(--text-1);
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a,
.footer-links span{
  font-size:14px;
  color:var(--text-2);
  text-decoration:none;
}
.footer-links a:hover{color:var(--brand-400);}
.copyright{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:22px;
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;
  right:20px;bottom:24px;
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(18,30,48,.75);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  color:var(--text-1);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease,border-color .24s ease;
  z-index:70;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{border-color:var(--brand-500);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-main{
    position:fixed;
    top:76px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:16px 20px 28px;
    background:var(--bg-1);
    border-bottom:1px solid var(--line);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    transition:transform .25s ease,opacity .25s ease,visibility .25s ease;
    margin-left:0;
  }
  body.nav-open .nav-main{transform:none;opacity:1;visibility:visible;}
  .nav-link{
    min-height:44px;
    padding:12px 14px;
    border-radius:12px;
    font-size:16px;
  }
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:rgba(61,123,255,.14);}
  .header-actions{display:none;}
  .burger{display:flex;}
  .group-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .group-card:nth-child(2),
  .group-card:nth-child(4){margin-top:0;}
  .track{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:36px;}
  .track::before{display:none;}
  .track-node:nth-child(even){transform:none;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .fcard,
  .faq-item,
  .group-card,
  .step{
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }
  .fcard{background:var(--bg-2);}
  .faq-item{background:var(--bg-2);}
}
@media (max-width:767px){
  body{padding-top:68px;}
  .header-inner{min-height:68px;}
  .nav-main{top:68px;}
  .hero{padding:56px 0 48px;}
  .section{padding:60px 0;}
  .matrix .cell{padding:0 10px 20px;}
  .matrix{margin:0 -10px;}
  .split{gap:28px;}
}
@media (max-width:639px){
  .wrap{padding:0 18px;}
  .hero h1{font-size:clamp(24px,7vw,32px);}
  .hero-lead{font-size:15.5px;}
  .hero-facts{gap:18px;}
  .fact strong{font-size:20px;}
  .group-grid{grid-template-columns:1fr;}
  .track{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .rel-grid{grid-template-columns:1fr;}
  .filter-note{margin-left:0;}
  .cta-band{padding:44px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .faq-a p{padding-left:20px;}
}

/* roulang page: category3 */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1420;
  --bg-2:#101B2B;
  --line:rgba(140,175,220,.16);
  --line-strong:rgba(140,175,220,.3);
  --glass:rgba(18,30,48,.55);
  --glass-hi:rgba(255,255,255,.06);
  --brand-500:#3D7BFF;
  --brand-400:#6FA0FF;
  --brand-700:#1E4FC4;
  --accent-500:#FFB25A;
  --accent-600:#E8952F;
  --ok:#37D67A;
  --warn:#FF6B6B;
  --text-1:#EAF1FA;
  --text-2:#A9BACF;
  --text-3:#6F8299;
  --radius-card:16px;
  --radius-btn:999px;
  --radius-input:12px;
  --radius-img:14px;
  --shadow-card:0 18px 48px rgba(3,8,18,.55);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --wrap:1200px;
}
*,*::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-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;}
p{margin:0;}
:focus-visible{outline:2px solid #fff;outline-offset:2px;border-radius:6px;}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  transition:transform .18s ease,box-shadow .22s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 12px 32px rgba(61,123,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:inset 0 1px 0 rgba(255,255,255,.32),0 16px 40px rgba(61,123,255,.5);}
.btn-primary:active{transform:translateY(-1px);}
.btn-ghost{
  color:var(--text-1);background:transparent;border:1px solid var(--line);
}
.btn-ghost:hover{border-color:var(--brand-400);color:#fff;transform:translateY(-2px);}
.btn-accent{
  color:#3a2508;background:transparent;border:1px solid var(--accent-500);
  box-shadow:0 12px 32px rgba(255,178,90,.22);
}
.btn-accent:hover{background:rgba(255,178,90,.12);transform:translateY(-2px);box-shadow:0 16px 40px rgba(255,178,90,.34);}
.btn-sm{padding:9px 20px;font-size:14px;}

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;border-bottom:1px solid transparent;
  transition:background-color .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.site-header.is-scrolled{
  background:rgba(9,16,26,.82);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
}
.header-inner{display:flex;align-items:center;gap:24px;height:76px;}
.brand-lock{display:flex;flex-direction:column;gap:1px;flex-shrink:0;}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.4px;color:#fff;}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.6px;}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:var(--text-2);border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:#fff;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:#fff;font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.burger{display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:5px;border:1px solid var(--line);border-radius:12px;background:rgba(18,30,48,.6);}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .22s ease,opacity .22s ease;}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer{
  position:fixed;inset:76px 0 0 0;z-index:55;
  background:rgba(7,12,20,.97);
  backdrop-filter:blur(16px);
  padding:24px 20px 40px;
  display:flex;flex-direction:column;gap:6px;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .24s ease,transform .24s ease;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.drawer a{
  display:flex;align-items:center;min-height:48px;padding:0 16px;border-radius:12px;
  font-size:16px;color:var(--text-2);border:1px solid transparent;
}
.drawer a.is-active{color:#fff;background:var(--glass);border-color:var(--line);}
.drawer a:hover{background:rgba(255,255,255,.05);color:#fff;}
.drawer .btn{margin-top:16px;width:100%;}

/* ---------- 频道条 ---------- */
.channel-bar{
  border-bottom:1px solid var(--line);
  background:var(--bg-1);
}
.channel-inner{display:flex;align-items:center;gap:8px;overflow-x:auto;padding:14px 0;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-inner a{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;font-size:14px;color:var(--text-2);
  border:1px solid var(--line);background:rgba(255,255,255,.02);
}
.channel-inner a:hover{color:#fff;border-color:var(--brand-400);}
.channel-inner a.is-active{
  color:#fff;background:linear-gradient(135deg,rgba(61,123,255,.9),rgba(30,79,196,.9));border-color:transparent;
}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:var(--text-3);padding:20px 0 0;
}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--brand-400);}
.crumb .sep{color:rgba(111,130,153,.6);}
.crumb .cur{color:var(--text-2);}

/* ---------- 板块基础 ---------- */
.section{padding:96px 0;position:relative;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1.2px;color:var(--brand-400);
  padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--glass);
  margin-bottom:16px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);box-shadow:0 0 10px var(--accent-500);}
.section-title{font-size:clamp(22px,3vw,32px);}
.section-desc{color:var(--text-2);margin-top:14px;font-size:16px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:132px 0 80px;
  background:
    radial-gradient(900px 420px at 88% 8%,rgba(61,123,255,.22),transparent 62%),
    radial-gradient(700px 380px at 6% 92%,rgba(255,178,90,.12),transparent 66%),
    var(--bg-0);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(140,175,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(140,175,220,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%,rgba(0,0,0,.75),transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,rgba(0,0,0,.75),transparent 72%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.22;margin-bottom:20px;}
.hero h1 em{font-style:normal;color:var(--brand-400);}
.hero-lead{color:var(--text-2);font-size:17px;max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.tag{
  font-size:13px;padding:6px 14px;border-radius:999px;color:var(--text-2);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;border-radius:var(--radius-img);border:1px solid var(--line);
  box-shadow:var(--shadow-card);object-fit:cover;aspect-ratio:4/3;
}
.glass-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px) saturate(140%);
  position:relative;
}
.glass-card::before{
  content:"";position:absolute;top:0;left:14px;right:14px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
}
.hero-float{
  position:absolute;right:-8px;bottom:-28px;width:min(300px,86%);
  padding:20px;
}
.hero-float .row-line{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed rgba(140,175,220,.16);}
.hero-float .row-line:last-child{border-bottom:0;}
.hero-float .k{font-size:13px;color:var(--text-3);}
.hero-float .v{font-size:15px;font-weight:600;color:var(--text-1);}
.hero-float .v.ok{color:var(--ok);}

/* ---------- 信任条 ---------- */
.trust-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-1);}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.trust-item{padding:26px 20px;border-right:1px solid var(--line);}
.trust-item:last-child{border-right:0;}
.trust-item .t-num{font-size:26px;font-weight:700;color:#fff;font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
.trust-item .t-num span{font-size:14px;color:var(--text-3);margin-left:4px;font-family:var(--font-cn);font-weight:500;}
.trust-item .t-label{font-size:13px;color:var(--text-3);margin-top:4px;}

/* ---------- 保障卡片 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;position:relative;backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.card::before{
  content:"";position:absolute;top:0;left:14px;right:14px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);
}
.card:hover{transform:translateY(-3px);border-color:rgba(61,123,255,.45);box-shadow:0 24px 60px rgba(3,8,18,.7);}
.card .ico{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(61,123,255,.14);border:1px solid rgba(61,123,255,.3);color:var(--brand-400);
  font-size:18px;margin-bottom:16px;
}
.card.amber .ico{background:rgba(255,178,90,.14);border-color:rgba(255,178,90,.32);color:var(--accent-500);}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{color:var(--text-2);font-size:15px;}
.card .meta-line{margin-top:16px;font-size:12px;color:var(--text-3);display:flex;gap:10px;flex-wrap:wrap;}

/* ---------- 对比表 ---------- */
.table-shell{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:var(--bg-2);
  box-shadow:var(--shadow-card);
}
.table-scroll{overflow-x:auto;}
table.cmp{width:100%;border-collapse:collapse;min-width:720px;}
table.cmp thead th{
  background:rgba(61,123,255,.13);
  color:#fff;font-size:14px;font-weight:600;text-align:left;
  padding:16px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
}
table.cmp thead th:first-child{color:var(--brand-400);}
table.cmp tbody td{
  padding:16px 18px;font-size:14px;color:var(--text-2);border-bottom:1px solid rgba(140,175,220,.09);
}
table.cmp tbody tr:nth-child(even){background:rgba(255,255,255,.02);}
table.cmp tbody tr:last-child td{border-bottom:0;}
table.cmp tbody td:first-child{color:var(--text-1);font-weight:600;}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:3px 10px;border-radius:999px;border:1px solid var(--line);}
.pill.on{color:var(--ok);border-color:rgba(55,214,122,.4);background:rgba(55,214,122,.1);}
.pill.mid{color:var(--accent-500);border-color:rgba(255,178,90,.4);background:rgba(255,178,90,.1);}
.pill.off{color:var(--text-3);}
.table-note{font-size:12px;color:var(--text-3);margin-top:14px;}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:12px;padding-left:0;}
.timeline::before{
  content:"";position:absolute;left:19px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--brand-500),rgba(61,123,255,.05));
}
.tl-item{position:relative;padding:0 0 34px 62px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;left:8px;top:4px;width:24px;height:24px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--brand-500);
  box-shadow:0 0 0 4px rgba(61,123,255,.12),0 0 18px rgba(61,123,255,.45);
  display:flex;align-items:center;justify-content:center;
  font-size:11px;font-family:var(--font-mono);color:var(--brand-400);
}
.tl-item h3{font-size:18px;margin-bottom:8px;}
.tl-item p{color:var(--text-2);font-size:15px;max-width:760px;}
.tl-step{font-size:12px;color:var(--accent-500);letter-spacing:1px;font-family:var(--font-mono);}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center;}
.split img{border-radius:var(--radius-img);border:1px solid var(--line);box-shadow:var(--shadow-card);aspect-ratio:16/11;object-fit:cover;width:100%;}
.check-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed rgba(140,175,220,.14);color:var(--text-2);font-size:15px;}
.check-list li:last-child{border-bottom:0;}
.check-list i{color:var(--brand-400);margin-top:6px;font-size:13px;}
.check-list strong{color:var(--text-1);font-weight:600;}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--glass);
  margin-bottom:14px;overflow:hidden;transition:border-color .2s ease;
}
.faq-item.is-open{border-color:rgba(61,123,255,.42);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;min-height:48px;
  padding:16px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-q .qmark{
  flex:0 0 30px;width:30px;height:30px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(61,123,255,.14);border:1px solid rgba(61,123,255,.3);color:var(--brand-400);
  font-size:14px;font-weight:700;
}
.faq-q .plus{margin-left:auto;color:var(--text-3);transition:transform .22s ease;font-size:15px;}
.faq-item.is-open .plus{transform:rotate(45deg);color:var(--brand-400);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease;}
.faq-a .inner{padding:0 20px 20px 64px;color:var(--text-2);font-size:15px;}
.faq-item.is-open .faq-a{max-height:340px;}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,var(--bg-2),var(--bg-1));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:56px 0;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-90px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,178,90,.3),transparent 66%);pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;}
.cta-inner h2{font-size:clamp(21px,2.6vw,28px);margin-bottom:10px;}
.cta-inner p{color:var(--text-2);font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0;}

/* ---------- 互链 ---------- */
.crosslinks{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.cross-link{
  display:block;padding:22px;border-radius:var(--radius-card);
  border:1px solid var(--line);background:var(--glass);
  transition:transform .22s ease,border-color .22s ease;
}
.cross-link:hover{transform:translateY(-3px);border-color:rgba(61,123,255,.45);}
.cross-link .cl-k{font-size:12px;color:var(--text-3);letter-spacing:1px;}
.cross-link .cl-t{font-size:17px;font-weight:600;margin:8px 0 6px;color:#fff;}
.cross-link .cl-d{font-size:14px;color:var(--text-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.footer-logo{font-size:17px;font-weight:700;color:#fff;}
.footer-sub{font-size:12px;color:var(--text-3);margin:6px 0 14px;letter-spacing:.6px;}
.site-footer p{color:var(--text-2);font-size:14px;max-width:340px;}
.site-footer h4{font-size:15px;margin-bottom:16px;color:#fff;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a,.footer-links span{font-size:14px;color:var(--text-2);}
.footer-links a:hover{color:var(--brand-400);}
.copyright{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.to-top{
  position:fixed;right:18px;bottom:18px;z-index:50;
  width:38px;height:38px;border-radius:50%;
  display:none;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);
  backdrop-filter:blur(12px);
}
.to-top.show{display:flex;}
.to-top:hover{color:#fff;border-color:var(--brand-400);}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-main,.header-actions{display:none;}
  .burger{display:flex;}
  .header-inner{justify-content:space-between;}
  .hero{padding:112px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-float{position:static;width:100%;margin-top:18px;}
  .glass-card,.card,.faq-item,.cross-link{backdrop-filter:none;background:rgba(18,30,48,.86);}
  .section{padding:66px 0;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .trust-grid{grid-template-columns:repeat(2,1fr);}
  .trust-item:nth-child(2){border-right:0;}
  .trust-item:nth-child(1),.trust-item:nth-child(2){border-bottom:1px solid var(--line);}
  .split{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:639px){
  body{font-size:15px;}
  .grid-3,.grid-2,.crosslinks{grid-template-columns:1fr;}
  .hero h1{font-size:clamp(26px,8vw,34px);}
  .trust-grid{grid-template-columns:1fr;}
  .trust-item{border-right:0;border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr;}
  .faq-a .inner{padding-left:20px;}
  .tl-item{padding-left:52px;}
  .cta-actions .btn{width:100%;}
}