/* roulang page: index */
:root{
  --bg:#070B12;
  --bg-2:#0D1420;
  --primary:#2FE3C8;
  --primary-light:#4EEBD4;
  --primary-dim:rgba(47,227,200,.12);
  --secondary:#8B7BFF;
  --gold:#FFB85C;
  --ok:#34D399;
  --warn:#F5A524;
  --danger:#F4586B;
  --text:#F2F6FA;
  --text-2:#A9B6C6;
  --text-3:#7C8899;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --glass-solid:rgba(13,20,32,.86);
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-in:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:180ms ease;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 520px at 78% -8%,rgba(47,227,200,.12),transparent 62%),
    radial-gradient(700px 420px at 6% 4%,rgba(139,123,255,.08),transparent 66%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.04;
  background-image:
    linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:40px 40px;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
button,input,select,textarea{font:inherit;color:inherit}
input,select,textarea{background:none;border:0;outline:none}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
.section{padding:96px 0;position:relative;z-index:1}
.section + .section{border-top:1px solid var(--line)}
.section-head{margin-bottom:44px;max-width:760px}
.section-head h2{font-size:clamp(24px,3.4vw,36px);font-weight:700;line-height:1.3;letter-spacing:-.3px;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:15.5px;max-width:46ch}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:44px}
.section-head-row .section-head{margin-bottom:0}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14.5px;border-bottom:1px solid rgba(47,227,200,.35);padding-bottom:3px;transition:all var(--ease)}
.link-more:hover{border-bottom-color:var(--primary)}
.link-more i{transition:transform var(--ease)}
.link-more:hover i{transform:translateX(4px)}
.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-pill);background:var(--primary-dim);color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.2px;border:1px solid rgba(47,227,200,.22)}
.badge-muted{background:rgba(255,255,255,.06);color:var(--text-2);border-color:var(--line)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-sm);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease);white-space:nowrap}
.btn-primary{background:var(--primary);color:#04120F;box-shadow:0 12px 36px rgba(47,227,200,.28)}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-2px);color:#04120F}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:rgba(47,227,200,.45);color:var(--primary)}
.btn-ghost:hover{background:rgba(47,227,200,.12);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:10px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(7,11,18,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);transition:background var(--ease),box-shadow var(--ease)}
.site-header.is-scrolled{background:rgba(7,11,18,.92);box-shadow:0 14px 40px rgba(0,0,0,.45)}
.nav-main{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:22px;padding:14px 0}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,rgba(47,227,200,.95),rgba(139,123,255,.7));display:grid;place-items:center;color:#04120F;box-shadow:0 10px 26px rgba(47,227,200,.25);flex-shrink:0}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.2px;white-space:nowrap}
.nav-search{position:relative;display:flex;align-items:center;height:48px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-sm);transition:border-color var(--ease),box-shadow var(--ease)}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,227,200,.14)}
.nav-search .search-icon{width:20px;height:20px;margin:0 8px 0 16px;flex-shrink:0;color:var(--text-3)}
.nav-search input[type="search"]{flex:1 1 auto;min-width:0;height:100%;padding:0 8px 0 0;font-size:14px;color:var(--text);background:none;border:0;outline:none}
.nav-search input[type="search"]::placeholder{color:var(--text-3)}
.nav-search input[type="search"]::-webkit-search-cancel-button{-webkit-appearance:none}
.search-btn{height:34px;margin-right:7px;padding:0 16px;border:0;border-radius:9px;background:var(--primary);color:#04120F;font-size:13px;font-weight:700;cursor:pointer;transition:background var(--ease),transform var(--ease)}
.search-btn:hover{background:var(--primary-light)}
.search-btn:active{transform:scale(.97)}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line-2);background:rgba(255,255,255,.04);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;transition:border-color var(--ease)}
.nav-toggle span{display:block;width:17px;height:2px;border-radius:2px;background:var(--text-2);transition:transform var(--ease),opacity var(--ease)}
.nav-toggle:hover{border-color:rgba(47,227,200,.45)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.cat-nav{display:flex;gap:8px;overflow-x:auto;padding:2px 0 12px;scrollbar-width:none;-ms-overflow-style:none}
.cat-nav::-webkit-scrollbar{display:none}
.cat-pill{padding:7px 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-2);font-size:13.5px;white-space:nowrap;transition:all var(--ease)}
.cat-pill:hover{border-color:rgba(47,227,200,.4);color:var(--text);background:rgba(47,227,200,.08)}
.cat-pill.active{background:rgba(47,227,200,.14);border-color:rgba(47,227,200,.5);color:var(--primary);font-weight:600}
.mobile-panel{display:none;padding:0 0 16px}
.mobile-panel .nav-search{margin-bottom:12px}
.mobile-actions{display:flex;gap:10px}
.mobile-actions .btn{flex:1 1 0}
.mobile-panel.is-open{display:block}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:72px 0 96px;z-index:1}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:.22;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),transparent 88%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),transparent 88%);
}
.hero-glow{position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:1100px;height:560px;background:radial-gradient(closest-side,rgba(47,227,200,.12),transparent 72%);pointer-events:none;z-index:0}
.hero .container{position:relative;z-index:2}
.hero-grid{display:flex;align-items:center;gap:56px;flex-wrap:wrap}
.hero-copy{flex:1 1 420px;min-width:0;max-width:600px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:var(--r-pill);background:rgba(47,227,200,.1);border:1px solid rgba(47,227,200,.25);color:var(--primary);font-size:13px;margin-bottom:22px}
.eyebrow i{font-size:11px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.18;font-weight:800;letter-spacing:-.5px;margin-bottom:22px}
.hero-sub{font-size:17px;line-height:1.9;color:var(--text-2);max-width:44ch;margin-bottom:34px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.trust-row{display:flex;gap:22px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
.trust-row li{display:inline-flex;align-items:center;gap:7px}
.trust-row i{color:var(--primary);font-size:12px}
.hero-visual{position:relative;flex:1 1 380px;min-width:0;max-width:520px}
.hero-card{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-2);background:var(--glass);box-shadow:var(--shadow),var(--shadow-in)}
.hero-card img{width:100%;height:250px;object-fit:cover}
.hero-card-body{padding:22px 24px 24px;position:relative}
.hero-card-body::before{content:"";position:absolute;left:24px;right:24px;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,227,200,.5),transparent)}
.hero-card-body h3{font-size:18px;font-weight:600;line-height:1.5;margin:12px 0 8px}
.hero-card-body p{font-size:14px;color:var(--text-2)}
.hero-float{position:absolute;left:-26px;bottom:-26px;width:200px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line-2);background:var(--glass-solid);box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.hero-float img{width:100%;height:96px;object-fit:cover}
.hero-float span{display:block;padding:10px 14px 12px;font-size:12.5px;color:var(--text-2)}
.hero-arc{position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),transparent)}

/* ---------- metrics ---------- */
.metrics{padding:0 0 96px;position:relative;z-index:1}
.metrics-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap)}
.metric-card{padding:24px 22px;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-in);transition:transform var(--ease),border-color var(--ease)}
.metric-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35)}
.metric-ico{width:22px;height:22px;color:var(--primary);margin-bottom:16px}
.metric-num{font-size:clamp(34px,4vw,46px);font-weight:700;line-height:1.1;color:var(--gold);font-variant-numeric:tabular-nums;letter-spacing:-1px}
.metric-unit{font-size:14px;color:var(--text-3);font-weight:400;margin-left:4px}
.metric-label{margin-top:10px;font-size:13.5px;color:var(--text-2)}

/* ---------- bento services ---------- */
.bento-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap)}
.bento-col{display:grid;gap:var(--gap)}
.bento-large{position:relative;display:block;min-height:320px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-2);box-shadow:var(--shadow);transition:transform var(--ease),border-color var(--ease)}
.bento-large img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.bento-large::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(200deg,rgba(7,11,18,.42) 0%,rgba(7,11,18,.9) 72%)}
.bento-large-body{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding:30px}
.bento-large-body h3{font-size:22px;font-weight:700;line-height:1.45;margin:14px 0 10px;color:#fff}
.bento-large-body p{font-size:14.5px;color:rgba(242,246,250,.78);max-width:36ch;margin-bottom:16px}
.bento-large:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.45)}
.bento-small{position:relative;display:block;padding:22px 24px;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-in);transition:transform var(--ease),border-color var(--ease);height:100%}
.bento-small::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;border-radius:var(--r-md) var(--r-md) 0 0;background:linear-gradient(90deg,transparent,rgba(47,227,200,.6),transparent);opacity:0;transition:opacity var(--ease)}
.bento-small:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35)}
.bento-small:hover::before{opacity:1}
.bento-small .bi{width:24px;height:24px;color:var(--primary);margin-bottom:14px}
.bento-small h3{font-size:17px;font-weight:600;margin-bottom:8px}
.bento-small p{font-size:14px;color:var(--text-2);line-height:1.75}
.bento-small .arrow{position:absolute;right:22px;bottom:20px;color:var(--text-3);font-size:14px;transition:transform var(--ease),color var(--ease)}
.bento-small:hover .arrow{transform:translateX(4px);color:var(--primary)}

/* ---------- news cards ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.news-card{display:flex;flex-direction:column;height:100%;border-radius:var(--r-md);overflow:hidden;background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-in);transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
.news-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);box-shadow:var(--shadow)}
.news-thumb{position:relative;overflow:hidden;background:rgba(255,255,255,.03)}
.news-thumb img{width:100%;height:186px;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(7,11,18,.72),rgba(7,11,18,0) 62%)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;gap:10px}
.news-body h3{font-size:17px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14px;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3)}
.news-meta .meta-date{display:inline-flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums}
.news-empty{min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;text-align:center;padding:32px;border-radius:var(--r-md);background:var(--glass);border:1px dashed rgba(255,255,255,.14)}
.news-empty i{font-size:26px;color:var(--text-3)}
.news-empty p{color:var(--text-2);font-size:15px}
.news-empty .actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}

/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap);position:relative}
.compare-col{padding:28px 26px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(255,255,255,.025);box-shadow:var(--shadow-in);height:100%}
.compare-after{border-color:rgba(47,227,200,.32);background:linear-gradient(165deg,rgba(47,227,200,.09),rgba(255,255,255,.02));box-shadow:0 20px 60px rgba(0,0,0,.4),var(--shadow-in)}
.compare-col h3{font-size:18px;font-weight:600;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.compare-after h3{color:var(--primary)}
.compare-col h3 i{font-size:14px}
.cmp-list{display:grid;gap:14px}
.cmp-list li{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:14px;border-bottom:1px dashed rgba(255,255,255,.08)}
.cmp-list li:last-child{border-bottom:0;padding-bottom:0}
.cmp-name{font-size:14.5px;color:var(--text-2)}
.cmp-val{font-size:15px;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.compare-before .cmp-val{color:var(--text-3)}
.compare-after .cmp-val{color:var(--primary)}
.compare-mid{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--bg-2);border:1px solid rgba(47,227,200,.35);color:var(--primary);box-shadow:0 0 0 6px rgba(7,11,18,.9);z-index:3}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);overflow:hidden;transition:border-color var(--ease)}
.faq-item.is-open{border-color:rgba(47,227,200,.35)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;background:none;border:0;text-align:left;cursor:pointer;font-size:16px;font-weight:600;color:var(--text);transition:color var(--ease);position:relative}
.faq-q::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;border-radius:2px;background:var(--primary);opacity:0;transition:opacity var(--ease)}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--primary);border-radius:2px;transform:translate(-50%,-50%);transition:transform var(--ease),opacity var(--ease)}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 24px 22px 24px;font-size:15px;line-height:1.9;color:var(--text-2)}
.faq-cta{margin-top:32px}

/* ---------- form ---------- */
.contact-wrap{max-width:820px;margin:0 auto;border-radius:var(--r-lg);border:1px solid var(--line-2);background:var(--glass);box-shadow:var(--shadow),var(--shadow-in);padding:40px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.form-field{display:flex;flex-direction:column;gap:8px}
.form-field.full{grid-column:1 / -1}
.form-field label{font-size:14px;color:var(--text-2)}
.form-field label .req{color:var(--danger);margin-left:3px}
.form-field input,.form-field select,.form-field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);
  color:var(--text);font-size:14.5px;transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.form-field textarea{height:auto;min-height:118px;padding:12px 14px;line-height:1.8;resize:vertical}
.form-field select{appearance:none;-webkit-appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;cursor:pointer}
.form-field select option{background:#0D1420;color:var(--text)}
.form-field input::placeholder,.form-field textarea::placeholder{color:var(--text-3)}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,227,200,.14);background:rgba(47,227,200,.05)}
.form-foot{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.form-privacy{font-size:12.5px;color:var(--text-3);max-width:46ch;line-height:1.7}
.form-status{grid-column:1 / -1;font-size:13.5px;min-height:20px;color:var(--text-3)}
.form-status.is-error{color:var(--danger)}
.form-status.is-ok{color:var(--ok)}

/* ---------- footer ---------- */
.site-footer{position:relative;z-index:1;margin-top:0;border-top:1px solid transparent;background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,0));padding-top:1px}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,227,200,.5),rgba(139,123,255,.35),transparent)}
.footer-cols{padding:72px 0 48px}
.footer-brand-desc{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.85;max-width:38ch}
.footer-contact{margin-top:20px;display:grid;gap:10px;font-size:13.5px;color:var(--text-3)}
.footer-contact li{display:inline-flex;align-items:center;gap:9px}
.footer-contact i{color:var(--primary);font-size:12px;width:14px}
.footer-title{font-size:14.5px;font-weight:600;margin-bottom:18px;color:var(--text)}
.footer-links{display:grid;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-links a:hover{color:var(--primary);transform:translateX(3px)}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0 30px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:var(--text-3)}
.to-top{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(47,227,200,.35);color:var(--primary);background:rgba(47,227,200,.08);box-shadow:0 8px 26px rgba(47,227,200,.18);transition:transform var(--ease),background var(--ease)}
.to-top:hover{transform:translateY(-3px);background:rgba(47,227,200,.18)}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .nav-main{grid-template-columns:1fr auto;gap:14px}
  .nav-search,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .hero{padding:52px 0 72px}
  .hero-grid{gap:40px}
  .hero-float{left:auto;right:-14px;bottom:-18px;width:176px}
  .metrics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:64px 0}
  .compare-mid{display:none}
}
@media screen and (max-width:899px){
  .bento-row{grid-template-columns:1fr}
  .compare-grid{grid-template-columns:1fr}
}
@media screen and (max-width:640px){
  .container{padding:0 16px}
  .brand-text{font-size:14px}
  .brand-mark{width:34px;height:34px}
  .hero{padding:40px 0 56px}
  .hero h1{font-size:28px;line-height:1.25}
  .hero-sub{font-size:15.5px;max-width:none}
  .hero-cta{gap:10px}
  .hero-cta .btn{flex:1 1 100%}
  .hero-float{position:static;width:100%;margin-top:16px}
  .hero-card img{height:200px}
  .metrics{padding-bottom:56px}
  .metrics-grid{gap:14px}
  .metric-card{padding:18px 16px}
  .news-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .section-head{margin-bottom:30px}
  .bento-large{min-height:260px}
  .bento-large-body{padding:22px}
  .form-grid{grid-template-columns:1fr}
  .contact-wrap{padding:26px 20px}
  .footer-cols{padding:52px 0 36px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 18px 18px}
  .form-foot .btn{width:100%}
}
@media print{
  body{background:#fff;color:#000}
  body::before,body::after,.hero-glow,.to-top,.nav-toggle{display:none!important}
  .site-header,.site-footer{position:static}
}

/* roulang page: article */
:root{
  --bg:#070B12;
  --bg-2:#0D1420;
  --primary:#2FE3C8;
  --primary-ink:#04120F;
  --second:#8B7BFF;
  --gold:#FFB85C;
  --success:#34D399;
  --warning:#F5A524;
  --danger:#F4586B;
  --text:#F2F6FA;
  --text-2:#A9B6C6;
  --text-3:#7C8899;
  --line:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.09);
  --glass:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  --glass-solid:rgba(13,20,32,.86);
  --r-sm:12px;
  --r:16px;
  --r-lg:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-in:inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 12px 36px rgba(47,227,200,.28);
  --ease:180ms ease;
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(760px 420px at 78% -12%, rgba(47,227,200,.12), transparent 68%),
    radial-gradient(620px 380px at 6% 4%, rgba(139,123,255,.08), transparent 70%),
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px) 0 0/40px 40px,
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px) 0 0/40px 40px;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color var(--ease), border-color var(--ease), background var(--ease);}
a:hover{color:#7ff2e2;}
p{margin:0 0 1em;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:var(--text);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--glow);}
.btn-primary:hover{background:#4fe9d2;color:var(--primary-ink);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(47,227,200,.22);}
.btn-ghost{background:var(--glass);border-color:rgba(47,227,200,.45);color:var(--primary);}
.btn-ghost:hover{background:rgba(47,227,200,.12);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  border-bottom:1px solid rgba(47,227,200,.4);
  padding-bottom:2px;
}
.text-link i{transition:transform var(--ease);}
.text-link:hover i{transform:translateX(4px);}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,11,18,.82);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-main{display:flex;align-items:center;gap:18px;padding:14px 0;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(150deg, rgba(47,227,200,.22), rgba(139,123,255,.16));
  border:1px solid rgba(47,227,200,.32);
  color:var(--primary);
  box-shadow:var(--shadow-in);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.3px;white-space:nowrap;}
.nav-search{
  position:relative;
  flex:1 1 auto;
  display:flex;
  align-items:center;
  gap:8px;
  height:48px;
  min-width:0;
  padding:0 8px 0 44px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  border-radius:12px;
  transition:border-color var(--ease), box-shadow var(--ease), background var(--ease);
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,227,200,.14);}
.nav-search .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:var(--text-3);}
.nav-search input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  background:transparent;
  border:0;
  outline:0;
  color:var(--text);
  font-size:15px;
}
.nav-search input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;
  height:36px;
  padding:0 16px;
  border:0;
  border-radius:10px;
  background:var(--primary);
  color:var(--primary-ink);
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background var(--ease), transform var(--ease);
}
.search-btn:hover{background:#4fe9d2;}
.search-btn:active{transform:scale(.97);}
.nav-actions{display:flex;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  cursor:pointer;
  padding:0;
  place-items:center;
  gap:4px;
  flex-direction:column;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:transform var(--ease), opacity var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.cat-nav{display:flex;gap:10px;padding:0 0 14px;overflow-x:auto;scrollbar-width:none;}
.cat-nav::-webkit-scrollbar{display:none;}
.cat-pill{
  flex:0 0 auto;
  padding:7px 16px;
  border-radius:999px;
  font-size:14px;
  color:var(--text-2);
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  white-space:nowrap;
  transition:all var(--ease);
}
.cat-pill:hover{color:var(--primary);border-color:rgba(47,227,200,.4);background:rgba(47,227,200,.08);}
.cat-pill.active{color:var(--primary-ink);background:var(--primary);border-color:var(--primary);font-weight:600;}

.mobile-panel{display:none;padding:0 0 18px;border-top:1px solid var(--line);margin-top:4px;}
.mobile-panel.open{display:block;}
.mobile-panel .nav-search{margin:16px 0 14px;height:44px;}
.mobile-cats{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:56px 0 52px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg, rgba(7,11,18,.74), rgba(7,11,18,.95)), url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(47,227,200,.55), transparent);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:rgba(255,255,255,.22);}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.28);
}
.article-hero h1{
  margin:18px 0 20px;
  max-width:920px;
  font-size:clamp(26px,3.6vw,40px);
  font-weight:800;
  line-height:1.3;
  letter-spacing:.2px;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  font-size:15px;
  color:var(--text-3);
}
.meta-row .item{display:inline-flex;align-items:center;gap:7px;}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22);}
.meta-row i{color:var(--primary);opacity:.85;}

/* ---------- article body ---------- */
.article-wrap{padding:64px 0 8px;}
.article-body{
  max-width:760px;
  margin:0 auto;
}
.article-body p{font-size:17px;line-height:1.9;margin:0 0 1.2em;color:#DCE5EE;}
.article-body h2{
  font-size:24px;
  font-weight:700;
  line-height:1.45;
  margin:40px 0 16px;
  padding-left:14px;
  border-left:3px solid var(--primary);
}
.article-body h3{font-size:19px;font-weight:600;margin:28px 0 12px;}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px;color:var(--text-2);}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:24px;list-style:revert;}
.article-body li{font-size:17px;line-height:1.9;margin-bottom:.4em;color:#DCE5EE;}
.article-body li::marker{color:var(--primary);}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  background:var(--glass);
  border-left:3px solid var(--primary);
  border-radius:var(--r-sm);
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;
  border-radius:14px;
  margin:10px 0 13px;
  border:1px solid var(--border);
}
.article-body figure{margin:26px 0;}
.article-body figcaption{
  font-size:13px;
  color:var(--text-3);
  text-align:center;
  margin-top:2px;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  border-radius:var(--r-sm);
  overflow:hidden;
}
.article-body th,.article-body td{
  padding:12px 14px;
  border:1px solid rgba(255,255,255,.12);
  text-align:left;
  line-height:1.7;
}
.article-body thead th{background:rgba(47,227,200,.1);color:var(--text);font-weight:600;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(47,227,200,.45);}
.article-body a:hover{color:#7ff2e2;border-bottom-color:rgba(127,242,226,.8);}
.article-body code{
  padding:2px 7px;
  border-radius:6px;
  background:rgba(255,255,255,.08);
  color:var(--gold);
  font-size:15px;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:34px 0;}

.article-foot{
  max-width:760px;
  margin:34px auto 0;
  padding-top:24px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;
  align-items:center;
  padding:5px 13px;
  border-radius:999px;
  font-size:13px;
  color:var(--text-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}
.tag:hover{color:var(--primary);border-color:rgba(47,227,200,.4);}
.foot-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:38px;
  padding:0 15px;
  border-radius:10px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  color:var(--text-2);
  font-size:14px;
  cursor:pointer;
  transition:all var(--ease);
}
.copy-btn:hover{color:var(--primary);border-color:rgba(47,227,200,.4);}

.empty-state{
  padding:56px 28px;
  text-align:center;
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow), var(--shadow-in);
}
.empty-state i{font-size:30px;color:var(--primary);opacity:.85;}
.empty-state h2{font-size:22px;margin:16px 0 10px;padding:0;border:0;}
.empty-state p{color:var(--text-2);font-size:16px;}
.empty-state .btn{margin-top:14px;}

/* ---------- related ---------- */
.related{padding:64px 0 8px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:28px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);}
.section-head .sub{font-size:14px;color:var(--text-3);margin-top:8px;}

.post-card{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:16px;
  border-radius:var(--r);
  background:var(--glass);
  border:1px solid var(--border);
  box-shadow:var(--shadow), var(--shadow-in);
  transition:transform var(--ease), border-color var(--ease), box-shadow var(--ease);
  position:relative;
  overflow:hidden;
}
.post-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, rgba(47,227,200,.7), transparent);
  opacity:0;
  transition:opacity var(--ease);
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.post-card:hover::before{opacity:1;}
.post-thumb{
  border-radius:14px;
  overflow:hidden;
  margin-bottom:16px;
  background:var(--bg-2);
}
.post-thumb img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:14px;
  transition:transform 320ms ease;
}
.post-card:hover .post-thumb img{transform:scale(1.03);}
.post-card .badge{margin-bottom:12px;align-self:flex-start;}
.post-title{
  font-size:18px;
  font-weight:600;
  line-height:1.55;
  margin-bottom:10px;
  color:var(--text);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-desc{
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
  margin:0 0 16px;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  padding-top:14px;
  border-top:1px solid var(--line);
}
.post-foot i{color:var(--primary);opacity:.8;}
.post-foot .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22);}
.post-card:hover .post-title{color:var(--primary);}

/* ---------- cta strip ---------- */
.cta-strip{padding:64px 0 72px;}
.cta-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  padding:26px 30px;
  border-radius:var(--r-lg);
  background:linear-gradient(160deg, rgba(47,227,200,.1), rgba(255,255,255,.02));
  border:1px solid rgba(47,227,200,.24);
  box-shadow:var(--shadow), var(--shadow-in);
}
.cta-bar h2{font-size:20px;font-weight:700;margin-bottom:6px;}
.cta-bar p{margin:0;font-size:14px;color:var(--text-2);}
.cta-bar-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:rgba(13,20,32,.7);
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:8px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(47,227,200,.5), transparent);
}
.footer-cols{padding-bottom:36px;}
.footer-brand-desc{
  font-size:14px;
  color:var(--text-2);
  line-height:1.85;
  margin:16px 0 18px;
  max-width:40ch;
}
.footer-contact li{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:14px;
  color:var(--text-3);
  margin-bottom:8px;
}
.footer-contact i{color:var(--primary);opacity:.85;}
.footer-title{
  font-size:15px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
  letter-spacing:.4px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--text-2);}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
}
.footer-bottom p{margin:0;font-size:13px;color:var(--text-3);}
.to-top{
  width:42px;height:42px;
  border-radius:50%;
  display:grid;place-items:center;
  color:var(--primary);
  background:rgba(47,227,200,.1);
  border:1px solid rgba(47,227,200,.32);
  box-shadow:0 8px 24px rgba(47,227,200,.16);
  transition:all var(--ease);
}
.to-top:hover{background:var(--primary);color:var(--primary-ink);transform:translateY(-2px);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-wrap{padding-top:56px;}
}
@media (max-width:1023px){
  .container{padding:0 20px;}
  .page-hero{padding:44px 0 40px;}
  .article-wrap{padding:48px 0 8px;}
  .related{padding:52px 0 8px;}
  .cta-strip{padding:52px 0 60px;}
  .site-footer{padding-top:52px;}
}
@media (max-width:979px){
  .nav-search,.nav-actions{display:none;}
  .nav-toggle{display:flex;margin-left:auto;align-items:center;justify-content:center;}
  .brand-text{font-size:16px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .page-hero{padding:34px 0 32px;}
  .article-hero h1{font-size:clamp(24px,6vw,30px);}
  .article-body p,.article-body li{font-size:16px;}
  .article-body h2{font-size:21px;margin-top:32px;}
  .article-body h3{font-size:18px;}
  .article-wrap{padding:40px 0 8px;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .related{padding:44px 0 8px;}
  .cta-strip{padding:44px 0 52px;}
  .cta-bar{padding:22px 20px;}
  .cta-bar-actions{width:100%;}
  .cta-bar-actions .btn{flex:1 1 auto;}
  .section-head{margin-bottom:22px;}
  .footer-cols{padding-bottom:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand-text{font-size:15px;}
  .brand-mark{width:34px;height:34px;}
  .search-btn{padding:0 12px;font-size:13px;}
  .cta-bar-actions .btn{width:100%;}
  .post-card{padding:14px;}
}
@media print{
  body{background:#fff;color:#111;}
  body::before,.site-header,.cta-strip,.to-top{display:none;}
  .article-body p,.article-body li{color:#111;}
}

/* roulang page: category1 */
:root{
  --bg:#070B12;
  --surface:#0D1420;
  --primary:#2FE3C8;
  --primary-ink:#04120F;
  --secondary:#8B7BFF;
  --gold:#FFB85C;
  --text:#F2F6FA;
  --text-2:#A9B6C6;
  --text-3:#7C8899;
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --glass:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  --radius-sm:10px;
  --radius-card:16px;
  --radius-lg:20px;
  --radius-img:14px;
  --radius-btn:12px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 12px 36px rgba(47,227,200,.28);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(920px 520px at 50% -12%, rgba(47,227,200,.12), transparent 70%),
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:auto, 40px 40px, 40px 40px;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:#6df0dc;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:.2px;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,11,18,.72);
  border-bottom:1px solid var(--line-soft);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:background var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(7,11,18,.9);
  box-shadow:0 12px 40px rgba(0,0,0,.45);
}
.nav-main{
  display:flex;
  align-items:center;
  gap:20px;
  padding:14px 0 12px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-weight:700;
  flex:0 0 auto;
  text-decoration:none;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:12px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--primary);
  background:linear-gradient(150deg, rgba(47,227,200,.22), rgba(139,123,255,.18));
  border:1px solid var(--line);
  box-shadow:var(--inset);
  flex:0 0 auto;
}
.brand-text{font-size:17px;letter-spacing:.3px;white-space:nowrap;}
.nav-search{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  align-items:center;
  gap:10px;
  height:48px;
  padding:0 6px 0 16px;
  border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.nav-search:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(47,227,200,.14);
}
.search-icon{width:19px;height:19px;color:var(--text-3);flex:0 0 auto;}
.nav-search input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  outline:none;
  background:transparent;
  font-size:14px;
}
.nav-search input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;
  height:36px;
  padding:0 18px;
  border-radius:10px;
  border:1px solid rgba(47,227,200,.35);
  background:rgba(47,227,200,.12);
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background var(--ease),transform var(--ease);
}
.search-btn:hover{background:rgba(47,227,200,.24);transform:translateY(-1px);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  cursor:pointer;
  flex:0 0 auto;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--ease),opacity var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.cat-nav{
  display:flex;
  gap:10px;
  padding:0 0 14px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.cat-nav::-webkit-scrollbar{display:none;}
.cat-pill{
  flex:0 0 auto;
  padding:8px 18px;
  border-radius:999px;
  font-size:14px;
  color:var(--text-2);
  background:rgba(255,255,255,.04);
  border:1px solid transparent;
  white-space:nowrap;
  transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease);
}
.cat-pill:hover{color:var(--text);border-color:rgba(47,227,200,.35);transform:translateY(-1px);}
.cat-pill.active{
  color:var(--primary-ink);
  background:var(--primary);
  font-weight:600;
  box-shadow:var(--glow);
  border-color:transparent;
}
.mobile-panel{display:none;padding:0 0 16px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .nav-search{margin-bottom:12px;}
.mobile-panel .nav-actions{flex-wrap:wrap;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  text-decoration:none;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--glow);}
.btn-primary:hover{background:#4ceada;color:var(--primary-ink);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:rgba(47,227,200,.45);
  color:var(--primary);
}
.btn-ghost:hover{background:rgba(47,227,200,.12);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  border-bottom:1px solid rgba(47,227,200,.4);
  padding-bottom:2px;
  transition:border-color var(--ease),gap var(--ease);
}
.text-link:hover{border-color:var(--primary);gap:10px;}

/* ============ 内页首屏 ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft);}
.page-hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:.55;
}
.page-hero-mask{
  position:absolute;
  inset:0;
  background:linear-gradient(115deg, rgba(7,11,18,.97) 0%, rgba(7,11,18,.88) 48%, rgba(7,11,18,.6) 100%);
}
.page-hero-inner{position:relative;padding:56px 0 60px;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:24px;
}
.crumb a{color:var(--text-3);text-decoration:none;transition:color var(--ease);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:rgba(255,255,255,.2);}
.crumb .current{color:var(--text-2);}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--primary);
  background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.28);
}
.page-hero h1{
  font-size:clamp(28px,4.4vw,44px);
  line-height:1.22;
  font-weight:800;
  margin:20px 0 16px;
  max-width:22em;
}
.hero-sub{
  font-size:clamp(15px,1.6vw,18px);
  color:var(--text-2);
  max-width:46ch;
  margin:0 0 30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:22px;
  margin:30px 0 0;
  padding:0;
  color:var(--text-3);
  font-size:13px;
}
.hero-trust li{display:inline-flex;align-items:center;gap:7px;}
.hero-trust i{color:var(--primary);font-size:12px;}
.hero-glow{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(47,227,200,.55), transparent);
}

/* ============ 目录 + 内容 ============ */
.layout-doc{align-items:flex-start;}
.toc{
  position:sticky;
  top:120px;
  padding:22px 20px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inset);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.toc-title{
  margin:0 0 14px;
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--text-3);
  text-transform:uppercase;
}
.toc-list li + li{border-top:1px solid var(--line-soft);}
.toc-list a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 4px;
  font-size:14px;
  color:var(--text-2);
  text-decoration:none;
  transition:color var(--ease),padding-left var(--ease);
}
.toc-list a:hover,
.toc-list a.is-active{color:var(--primary);padding-left:8px;}
.toc-num{
  flex:0 0 auto;
  width:28px;
  height:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:11.5px;
  color:var(--text-3);
  border:1px solid var(--line);
  border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.toc-list a.is-active .toc-num{color:var(--primary);border-color:rgba(47,227,200,.4);}
.toc-foot{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;
  color:var(--text-3);
  line-height:1.7;
}
.doc-block{
  padding-bottom:44px;
  margin-bottom:44px;
  border-bottom:1px solid var(--line-soft);
  scroll-margin-top:130px;
}
.doc-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.doc-head{display:flex;align-items:center;gap:14px;margin-bottom:16px;}
.num-badge{
  flex:0 0 auto;
  width:40px;
  height:40px;
  border-radius:12px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  font-weight:700;
  color:var(--primary);
  background:rgba(47,227,200,.1);
  border:1px solid rgba(47,227,200,.28);
  font-variant-numeric:tabular-nums;
}
.doc-head h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;}
.doc-lead{
  color:var(--text-2);
  font-size:15.5px;
  max-width:46em;
  margin:0 0 26px;
}
.mini-card{
  height:100%;
  padding:22px 20px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--inset);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.mini-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);box-shadow:var(--shadow),var(--inset);}
.mini-card h3{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  margin-bottom:10px;
}
.mini-card h3 i{color:var(--primary);font-size:15px;}
.mini-card p{margin:0;color:var(--text-2);font-size:14.5px;line-height:1.85;}
.steps{counter-reset:step;}
.steps li{
  counter-increment:step;
  position:relative;
  padding:0 0 24px 54px;
  margin-bottom:24px;
  border-bottom:1px solid var(--line-soft);
}
.steps li:last-child{border-bottom:0;padding-bottom:0;margin-bottom:0;}
.steps li::before{
  content:"0" counter(step);
  position:absolute;
  left:0;
  top:0;
  width:36px;
  height:36px;
  border-radius:11px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:700;
  color:var(--primary);
  background:rgba(47,227,200,.1);
  border:1px solid rgba(47,227,200,.25);
  font-variant-numeric:tabular-nums;
}
.steps h3{font-size:17px;margin-bottom:8px;}
.steps p{margin:0;color:var(--text-2);font-size:15px;max-width:46em;}
.tip-list li{
  display:grid;
  grid-template-columns:minmax(150px,220px) 1fr;
  gap:20px;
  padding:17px 0;
  border-bottom:1px solid var(--line-soft);
  align-items:start;
}
.tip-list li:first-child{border-top:1px solid var(--line-soft);}
.tip-key{
  font-size:15px;
  font-weight:600;
  color:var(--gold);
  line-height:1.7;
}
.tip-val{margin:0;color:var(--text-2);font-size:15px;line-height:1.85;}
.point-list li{
  display:flex;
  gap:12px;
  padding:13px 0;
  font-size:15px;
  color:var(--text-2);
  border-bottom:1px solid var(--line-soft);
}
.point-list li:last-child{border-bottom:0;}
.point-list i{color:var(--primary);margin-top:7px;font-size:13px;flex:0 0 auto;}
.figure{margin:0;}
.figure img{
  width:100%;
  height:auto;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
}
.figure figcaption{
  margin-top:13px;
  text-align:center;
  font-size:13px;
  color:var(--text-3);
}
.note-box{
  margin-top:26px;
  padding:22px 24px;
  border-radius:var(--radius-card);
  background:rgba(47,227,200,.06);
  border:1px solid rgba(47,227,200,.22);
  color:var(--text-2);
  font-size:15px;
}
.note-box strong{color:var(--text);}

/* ============ 相关分类与转化条 ============ */
.rel-block{
  margin-top:72px;
  padding-top:40px;
  border-top:1px solid var(--line-soft);
}
.rel-block h2{font-size:clamp(20px,2.4vw,24px);margin-bottom:18px;}
.rel-pills{display:flex;flex-wrap:wrap;gap:12px;}
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:14px;
  transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease);
}
.pill:hover{
  color:var(--primary);
  border-color:rgba(47,227,200,.42);
  background:rgba(47,227,200,.1);
  transform:translateY(-2px);
}
.pill i{font-size:12px;color:var(--primary);}
.cta-strip{
  margin-top:28px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:24px 28px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inset);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.cta-strip p{margin:0;color:var(--text-2);font-size:15px;max-width:56ch;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  z-index:1;
  padding:64px 0 28px;
  background:linear-gradient(180deg, rgba(13,20,32,.35), rgba(7,11,18,.96));
  border-top:1px solid var(--line-soft);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(47,227,200,.45), transparent);
}
.footer-cols{padding-top:8px;}
.footer-brand-desc{
  margin:18px 0;
  color:var(--text-2);
  font-size:14px;
  line-height:1.85;
  max-width:44ch;
}
.footer-contact{display:grid;gap:8px;color:var(--text-3);font-size:13.5px;}
.footer-contact i{color:var(--primary);margin-right:6px;}
.footer-title{font-size:15px;margin:0 0 18px;color:var(--text);}
.footer-links{display:grid;gap:11px;}
.footer-links a{
  color:var(--text-2);
  font-size:14px;
  transition:color var(--ease),padding-left var(--ease);
}
.footer-links a:hover{color:var(--primary);padding-left:5px;}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  color:var(--text-3);
  font-size:13px;
}
.footer-bottom p{margin:0;}
.to-top{
  width:40px;
  height:40px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--primary);
  background:rgba(47,227,200,.1);
  border:1px solid rgba(47,227,200,.3);
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease);
}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--glow);background:rgba(47,227,200,.2);}

@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))){
  .toc,.cta-strip,.site-header{background:rgba(13,20,32,.92);}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .section{padding:80px 0;}
}
@media (max-width:1023px){
  .nav-search{display:none;}
  .nav-toggle{display:flex;}
  .toc{position:static;top:auto;margin-bottom:36px;}
  .toc-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px;}
  .section{padding:64px 0;}
  .page-hero-inner{padding:44px 0 48px;}
}
@media (max-width:767px){
  .nav-actions .btn-ghost{display:none;}
  .brand-text{font-size:15px;}
  .tip-list li{grid-template-columns:1fr;gap:8px;}
  .section{padding:48px 0;}
  .doc-block{padding-bottom:34px;margin-bottom:34px;}
  .cta-strip{padding:20px;}
  .rel-block{margin-top:52px;}
}
@media (max-width:519px){
  .container{padding:0 16px;}
  .page-hero h1{font-size:26px;}
  .hero-actions .btn{width:100%;}
  .toc-list{grid-template-columns:1fr;}
  .steps li{padding-left:46px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media print{
  body{background:#fff;color:#000;}
  body::before,.site-header,.cta-strip,.to-top{display:none;}
}

/* roulang page: category2 */
:root{
  --bg:#070B12;
  --surface:#0D1420;
  --surface-2:rgba(255,255,255,.045);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --glass-solid:rgba(13,20,32,.86);
  --primary:#2FE3C8;
  --primary-soft:rgba(47,227,200,.12);
  --primary-line:rgba(47,227,200,.35);
  --accent:#8B7BFF;
  --gold:#FFB85C;
  --text:#F2F6FA;
  --text-2:#A9B6C6;
  --text-3:#7C8899;
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-in:inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 12px 36px rgba(47,227,200,.28);
  --gap:24px;
  --sec-pad:96px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 560px at 50% -12%,rgba(47,227,200,.11),transparent 62%),
    linear-gradient(rgba(255,255,255,.038) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.038) 1px,transparent 1px);
  background-size:auto,40px 40px,40px 40px;
  background-attachment:fixed,fixed,fixed;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;border-bottom:1px solid rgba(47,227,200,.28);transition:color .18s ease,border-color .18s ease;}
a:hover{color:#6BF2DC;border-bottom-color:var(--primary);}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:var(--sec-pad) 0;position:relative;}
.section + .section{border-top:1px solid var(--line-soft);}
.section--tight{padding:64px 0;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,18,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
}
.nav-main{display:flex;align-items:center;gap:20px;padding:14px 0 10px;}
.brand{display:inline-flex;align-items:center;gap:10px;border-bottom:none;flex:0 0 auto;}
.brand:hover{border-bottom:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  color:var(--primary);
  background:linear-gradient(150deg,rgba(47,227,200,.22),rgba(139,123,255,.16));
  border:1px solid rgba(47,227,200,.3);
  box-shadow:var(--shadow-in);
}
.brand-text{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.5px;white-space:nowrap;}
.nav-search{
  flex:1 1 auto;min-width:0;position:relative;display:flex;align-items:center;
  height:48px;border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,227,200,.14);background:rgba(255,255,255,.07);}
.search-icon{position:absolute;left:16px;width:19px;height:19px;color:var(--text-3);pointer-events:none;}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;padding:0 96px 0 46px;
  background:transparent;border:none;color:var(--text);font-size:14.5px;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{outline:none;}
.search-btn{
  position:absolute;right:6px;top:6px;bottom:6px;padding:0 18px;
  border:none;border-radius:9px;cursor:pointer;font-size:14px;font-weight:600;
  color:#04120F;background:var(--primary);box-shadow:0 6px 18px rgba(47,227,200,.22);
  transition:filter .18s ease,transform .18s ease;
}
.search-btn:hover{filter:brightness(1.08);transform:translateY(-1px);}
.search-btn:active{transform:translateY(0);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;cursor:pointer;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1.8px;background:var(--text-2);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.8px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.8px) rotate(-45deg);}

.cat-nav{display:flex;gap:10px;padding:0 0 14px;overflow-x:auto;scrollbar-width:none;}
.cat-nav::-webkit-scrollbar{display:none;}
.cat-pill{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;font-size:14px;
  color:var(--text-2);background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:color .18s ease,border-color .18s ease,background .18s ease,transform .18s ease;
}
.cat-pill:hover{color:var(--text);border-color:var(--primary-line);background:rgba(255,255,255,.07);transform:translateY(-1px);}
.cat-pill.active{color:#04120F;background:var(--primary);border-color:var(--primary);font-weight:600;box-shadow:0 8px 22px rgba(47,227,200,.25);}

.mobile-panel{
  display:none;padding:6px 0 18px;border-top:1px solid var(--line-soft);margin-top:6px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel .nav-search{margin-bottom:14px;}
.mobile-cats{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px;}
.mobile-actions{display:flex;gap:10px;flex-wrap:wrap;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 22px;height:46px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,filter .18s ease,background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-primary{color:#04120F;background:var(--primary);box-shadow:var(--glow);}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);color:#04120F;}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{
  color:var(--primary);background:rgba(255,255,255,.04);border-color:rgba(47,227,200,.45);
}
.btn-ghost:hover{background:rgba(47,227,200,.12);transform:translateY(-2px);color:var(--primary);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 内页首屏 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:72px 0 68px;
  background-image:
    linear-gradient(115deg,rgba(7,11,18,.94) 8%,rgba(7,11,18,.72) 52%,rgba(7,11,18,.88) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line-soft);
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),transparent);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:20px;}
.crumb a{color:var(--text-3);border-bottom-color:transparent;}
.crumb a:hover{color:var(--primary);border-bottom-color:var(--primary);}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.4px;
  color:var(--primary);background:var(--primary-soft);border:1px solid rgba(47,227,200,.28);
}
.badge--gold{color:var(--gold);background:rgba(255,184,92,.12);border-color:rgba(255,184,92,.3);}
.page-hero h1{
  font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.22;margin:18px 0 16px;
  max-width:22em;
}
.page-hero .lead{font-size:16.5px;color:var(--text-2);max-width:46ch;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-visual{position:relative;margin-top:8px;}
.hero-visual img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);}
.float-card{
  position:absolute;right:-6px;bottom:-26px;width:150px;
  border-radius:14px;border:1px solid rgba(47,227,200,.28);
  box-shadow:0 20px 50px rgba(0,0,0,.55);
}

/* ---------- 指标横条 ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  padding:22px;border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--shadow-in);
}
.metric-item{display:flex;align-items:center;gap:14px;padding:6px 10px;border-radius:14px;transition:background .18s ease;}
.metric-item + .metric-item{border-left:1px solid var(--line-soft);}
.metric-item:hover{background:rgba(255,255,255,.03);}
.metric-icon{
  width:40px;height:40px;flex:0 0 auto;border-radius:12px;display:grid;place-items:center;
  color:var(--primary);background:rgba(47,227,200,.1);border:1px solid rgba(47,227,200,.2);
  font-size:16px;
}
.metric-value{
  font-size:24px;font-weight:700;color:var(--gold);
  font-variant-numeric:tabular-nums;font-feature-settings:"tnum";
  line-height:1.25;
}
.metric-value span{font-size:13px;color:var(--text-3);font-weight:500;margin-left:5px;}
.metric-name{font-size:13px;color:var(--text-2);}

/* ---------- 板块标题 ---------- */
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{font-size:clamp(23px,3.2vw,34px);font-weight:700;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:15.5px;max-width:44ch;}
.section-head--row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;max-width:none;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;
  color:var(--primary);border-bottom:1px solid rgba(47,227,200,.5);
}
.text-link:hover{border-bottom-color:var(--primary);}
.text-link i{transition:transform .18s ease;}
.text-link:hover i{transform:translateX(3px);}

/* ---------- 参数对照 ---------- */
.compare-pair{display:grid;grid-template-columns:1fr 84px 1fr;align-items:stretch;gap:0;}
.compare-col{
  border-radius:var(--radius-lg);padding:26px 24px;
  background:linear-gradient(160deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
  border:1px solid var(--line);box-shadow:var(--shadow-in);
}
.compare-col.is-muted{background:linear-gradient(160deg,rgba(255,255,255,.03),rgba(255,255,255,.01));border-color:rgba(255,255,255,.07);}
.compare-col.is-highlight{
  border-color:var(--primary-line);
  background:linear-gradient(160deg,rgba(47,227,200,.12),rgba(47,227,200,.02));
  box-shadow:0 18px 46px rgba(47,227,200,.1),var(--shadow-in);
}
.compare-head{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.compare-head h3{font-size:19px;}
.compare-head i{font-size:18px;color:var(--primary);}
.compare-col.is-muted .compare-head i{color:var(--text-3);}
.compare-row{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:12px 0;border-top:1px solid var(--line-soft);
}
.compare-row:first-of-type{border-top:none;padding-top:0;}
.compare-key{font-size:14px;color:var(--text-3);flex:0 0 40%;}
.compare-val{font-size:14.5px;color:var(--text);text-align:right;flex:1 1 auto;font-variant-numeric:tabular-nums;}
.compare-col.is-highlight .compare-val{color:#DFFFF8;}
.vs-divider{display:grid;place-items:center;position:relative;}
.vs-divider::before{content:"";position:absolute;top:12%;bottom:12%;width:1px;background:linear-gradient(180deg,transparent,rgba(255,255,255,.16),transparent);}
.vs-divider span{
  position:relative;z-index:1;width:44px;height:44px;border-radius:999px;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:var(--text-2);
  background:var(--glass-solid);border:1px solid var(--line);
}
.compare-block + .compare-block{margin-top:44px;}
.compare-block-title{
  font-size:15px;color:var(--text-3);letter-spacing:.6px;margin-bottom:16px;
  display:flex;align-items:center;gap:10px;
}
.compare-block-title::after{content:"";flex:1 1 auto;height:1px;background:linear-gradient(90deg,rgba(255,255,255,.14),transparent);}
.compare-actions{margin-top:36px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.compare-actions .hint{font-size:13.5px;color:var(--text-3);}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.scene-card{
  position:relative;padding:28px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-in);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.scene-card::before{
  content:"";position:absolute;left:24px;right:24px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.7),transparent);
  opacity:0;transition:opacity .2s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:var(--primary-line);box-shadow:0 24px 54px rgba(0,0,0,.5),var(--shadow-in);}
.scene-card:hover::before{opacity:1;}
.scene-icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;
  color:var(--primary);background:rgba(47,227,200,.1);border:1px solid rgba(47,227,200,.22);font-size:18px;
}
.scene-card h3{font-size:18px;margin-bottom:10px;}
.scene-card p{font-size:14.5px;color:var(--text-2);}

/* ---------- 核对清单 ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px;}
.check-item{
  display:flex;gap:16px;padding:18px 0;border-top:1px solid var(--line-soft);align-items:flex-start;
}
.check-item:first-child,.check-item:nth-child(2){border-top:none;padding-top:0;}
.check-num{
  flex:0 0 auto;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:var(--primary);
  background:rgba(47,227,200,.1);border:1px solid rgba(47,227,200,.24);
  font-variant-numeric:tabular-nums;
}
.check-body h3{font-size:16.5px;margin-bottom:6px;}
.check-body p{font-size:14.5px;color:var(--text-2);}

/* ---------- FAQ ---------- */
.accordion{border:none;background:transparent;}
.accordion-item{
  border-radius:14px;border:1px solid var(--line);overflow:hidden;margin-bottom:12px;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  transition:border-color .2s ease,box-shadow .2s ease;
}
.accordion-item.is-active{border-color:var(--primary-line);box-shadow:inset 2px 0 0 var(--primary);}
.accordion-title{
  display:block;padding:18px 52px 18px 20px;position:relative;
  font-size:16px;font-weight:600;color:var(--text);border:none;background:transparent;
}
.accordion-title:hover{color:var(--primary);}
.accordion-title::before{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--primary);line-height:1;
}
.accordion-item.is-active .accordion-title::before{content:"–";}
.accordion-content{padding:0 20px 20px;border:none;background:transparent;color:var(--text-2);font-size:15px;line-height:1.9;}
.accordion-content p + p{margin-top:10px;}

/* ---------- 相关分类 + 转化条 ---------- */
.pill-group{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.pill-link{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;
  font-size:14.5px;color:var(--text-2);background:rgba(255,255,255,.04);
  border:1px solid var(--line);transition:transform .18s ease,color .18s ease,border-color .18s ease,background .18s ease;
}
.pill-link:hover{transform:translateY(-2px);color:var(--text);border-color:var(--primary-line);background:rgba(255,255,255,.07);}
.pill-link i{font-size:12px;color:var(--primary);}
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 28px;border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow),var(--shadow-in);
}
.cta-bar h3{font-size:19px;margin-bottom:6px;}
.cta-bar p{font-size:14.5px;color:var(--text-2);}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:8px;padding:72px 0 28px;
  background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(0,0,0,.28));
  border-top:1px solid var(--line-soft);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.45),transparent);
}
.footer-cols{padding-bottom:44px;}
.footer-brand-desc{font-size:14px;color:var(--text-2);margin:16px 0 18px;max-width:38ch;}
.footer-contact{display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--text-3);}
.footer-contact i{margin-right:8px;color:var(--primary);}
.footer-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-2);border-bottom-color:transparent;}
.footer-links a:hover{color:var(--primary);border-bottom-color:var(--primary);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;border-top:1px solid var(--line-soft);
}
.footer-bottom p{font-size:13.5px;color:var(--text-3);}
.to-top{
  width:42px;height:42px;border-radius:999px;display:grid;place-items:center;
  color:#04120F;background:var(--primary);border-bottom:none;
  box-shadow:0 10px 26px rgba(47,227,200,.25);transition:transform .18s ease,filter .18s ease;
}
.to-top:hover{transform:translateY(-3px);filter:brightness(1.08);color:#04120F;border-bottom:none;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1199px){
  :root{--sec-pad:80px;}
  .metric-strip{padding:18px;gap:12px;}
  .metric-value{font-size:21px;}
}
@media screen and (max-width:1023px){
  :root{--sec-pad:64px;}
  .nav-search{display:none;}
  .nav-actions{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-main{padding:12px 0 8px;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .check-grid{grid-template-columns:1fr;gap:0;}
  .check-item:nth-child(2){border-top:1px solid var(--line-soft);padding-top:18px;}
  .metric-strip{grid-template-columns:repeat(2,1fr);}
  .metric-item:nth-child(3),.metric-item:nth-child(4){border-left:none;}
  .metric-item + .metric-item{border-left:1px solid var(--line-soft);}
  .metric-item:nth-child(odd){border-left:none;}
  .compare-pair{grid-template-columns:1fr;gap:16px;}
  .vs-divider{height:44px;}
  .vs-divider::before{top:0;bottom:0;left:50%;width:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent);height:100%;}
}
@media screen and (max-width:767px){
  :root{--sec-pad:48px;--gap:16px;}
  .container{padding:0 16px;}
  .brand-text{font-size:15.5px;}
  .page-hero{padding:48px 0 52px;}
  .page-hero .lead{font-size:15.5px;}
  .float-card{display:none;}
  .scene-grid{grid-template-columns:1fr;}
  .compare-col{padding:22px 18px;}
  .compare-key{flex:0 0 42%;}
  .cat-nav{padding-bottom:12px;}
  .cta-bar{padding:20px;flex-direction:column;align-items:flex-start;}
  .cta-bar .btn{width:100%;}
  .footer-bottom{justify-content:flex-start;}
}
@media screen and (max-width:519px){
  .metric-strip{grid-template-columns:1fr;padding:14px;}
  .metric-item + .metric-item{border-left:none;border-top:1px solid var(--line-soft);}
  .hero-actions .btn{width:100%;}
  .search-btn{padding:0 14px;font-size:13.5px;}
}
@media print{
  .site-header,.to-top,.nav-search,.mobile-panel{display:none !important;}
  body{background:#fff;color:#111;}
}

/* roulang page: category3 */
:root{
  --bg:#070B12;
  --bg-2:#0D1420;
  --bg-3:#111A28;
  --primary:#2FE3C8;
  --primary-ink:#04120F;
  --accent:#8B7BFF;
  --gold:#FFB85C;
  --success:#34D399;
  --warn:#F5A524;
  --danger:#F4586B;
  --text:#F2F6FA;
  --text-2:#A9B6C6;
  --text-3:#7C8899;
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --glass:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --glass-solid:rgba(13,20,32,.86);
  --r-card:16px;
  --r-glass:20px;
  --r-img:14px;
  --r-btn:12px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-soft:0 14px 40px rgba(0,0,0,.32);
  --glow:0 12px 36px rgba(47,227,200,.28);
  --hl:inset 0 1px 0 rgba(255,255,255,.06);
  --container:1200px;
  --sec:96px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
  position:relative;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:40px 40px;
}
body::after{
  content:"";
  position:fixed;
  top:-320px;
  left:50%;
  width:1100px;
  height:760px;
  transform:translateX(-50%);
  pointer-events:none;
  z-index:0;
  background:radial-gradient(ellipse at center,rgba(47,227,200,.12),rgba(47,227,200,0) 68%);
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:#5CF0D9;}
p{margin:0 0 14px;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
::selection{background:rgba(47,227,200,.28);color:#fff;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}
.site-header,main,.site-footer{position:relative;z-index:2;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,11,18,.82);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{background:rgba(7,11,18,.94);border-bottom-color:var(--line);}
.nav-main{
  display:flex;
  align-items:center;
  gap:18px;
  padding:14px 0 12px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text);
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  border-radius:11px;
  color:var(--primary);
  border:1px solid rgba(47,227,200,.3);
  background:linear-gradient(160deg,rgba(47,227,200,.2),rgba(139,123,255,.1));
  box-shadow:var(--hl);
}
.brand-text{
  font-size:16px;
  font-weight:700;
  letter-spacing:.4px;
  white-space:nowrap;
}
.nav-search{
  position:relative;
  flex:1 1 340px;
  max-width:520px;
  display:flex;
  align-items:center;
}
.nav-search .search-icon{
  position:absolute;
  left:16px;
  width:20px;
  height:20px;
  color:var(--text-3);
  pointer-events:none;
}
.nav-search input[type="search"]{
  width:100%;
  height:48px;
  margin:0;
  padding:0 96px 0 46px;
  color:var(--text);
  font-size:14px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.05);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.nav-search input[type="search"]::placeholder{color:var(--text-3);}
.nav-search input[type="search"]:focus{
  outline:none;
  border-color:var(--primary);
  background:rgba(255,255,255,.07);
  box-shadow:0 0 0 4px rgba(47,227,200,.14);
}
.nav-search .search-btn{
  position:absolute;
  right:6px;
  height:36px;
  padding:0 18px;
  border:0;
  cursor:pointer;
  border-radius:9px;
  font-size:14px;
  font-weight:600;
  color:var(--primary-ink);
  background:var(--primary);
  transition:filter .18s ease,transform .18s ease;
}
.nav-search .search-btn:hover{filter:brightness(1.08);}
.nav-search .search-btn:active{transform:translateY(1px);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,filter .18s ease,background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-primary{
  color:var(--primary-ink);
  background:var(--primary);
  box-shadow:var(--glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);color:var(--primary-ink);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  color:var(--primary);
  background:var(--glass);
  border-color:rgba(47,227,200,.45);
}
.btn-ghost:hover{background:rgba(47,227,200,.12);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:10px 18px;font-size:14px;}

.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  padding:0;
  border-radius:11px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.cat-nav{
  display:flex;
  gap:10px;
  padding:0 0 14px;
  overflow-x:auto;
  scrollbar-width:none;
}
.cat-nav::-webkit-scrollbar{display:none;}
.cat-pill{
  flex:0 0 auto;
  padding:8px 18px;
  font-size:14px;
  font-weight:500;
  color:var(--text-2);
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  transition:color .2s ease,border-color .2s ease,background .2s ease,transform .2s ease;
}
.cat-pill:hover{color:var(--text);border-color:rgba(47,227,200,.35);background:rgba(47,227,200,.08);transform:translateY(-1px);}
.cat-pill.active{
  color:var(--primary-ink);
  background:var(--primary);
  border-color:var(--primary);
  font-weight:600;
  box-shadow:0 8px 24px rgba(47,227,200,.22);
}

.mobile-panel{display:none;padding:0 0 18px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .nav-search{max-width:none;margin-bottom:14px;}
.mobile-cats{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px;}
.mobile-cats a{
  padding:8px 16px;
  font-size:14px;
  color:var(--text-2);
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.mobile-cats a.is-current{color:var(--primary-ink);background:var(--primary);border-color:var(--primary);font-weight:600;}
.mobile-actions{display:flex;gap:10px;}
.mobile-actions .btn{flex:1;}

/* ---------- hero ---------- */
.hero-cat{
  position:relative;
  padding:64px 0 76px;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.hero-glow{
  position:absolute;
  top:-260px;
  right:-160px;
  width:760px;
  height:620px;
  background:radial-gradient(ellipse at center,rgba(47,227,200,.14),rgba(47,227,200,0) 70%);
  pointer-events:none;
}
.hero-arc{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,rgba(47,227,200,0),rgba(47,227,200,.6),rgba(139,123,255,.35),rgba(47,227,200,0));
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  align-items:center;
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--primary);}
.crumb-current{color:var(--text-2);}
.badge{
  display:inline-block;
  padding:6px 14px;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  border-radius:999px;
  background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.24);
  margin-bottom:18px;
}
.hero-cat h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.5px;
  margin-bottom:20px;
}
.hero-sub{
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
  max-width:40ch;
  margin-bottom:26px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.trust-list{display:flex;flex-wrap:wrap;gap:18px;}
.trust-list li{
  display:flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-3);
}
.trust-list i{color:var(--primary);font-size:13px;}

.hero-visual{position:relative;}
.hero-media{
  position:relative;
  border-radius:var(--r-glass);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow),var(--hl);
}
.hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,11,18,.05),rgba(7,11,18,.72));
}
.hero-float{
  position:absolute;
  left:-10px;
  bottom:-22px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 16px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass-solid);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-soft),var(--hl);
  max-width:280px;
}
.hero-float img{width:76px;height:56px;object-fit:cover;border-radius:10px;}
.float-title{margin:0;font-size:14px;font-weight:600;color:var(--text);}
.float-desc{margin:0;font-size:12px;color:var(--text-3);line-height:1.6;}

/* ---------- section base ---------- */
.section{padding:var(--sec) 0;position:relative;}
.section + .section{border-top:1px solid var(--line-soft);}
.sec-head{max-width:720px;margin-bottom:44px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-label{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:1px;
  color:var(--primary);
  margin-bottom:12px;
}
.sec-head h2{
  font-size:clamp(24px,3vw,34px);
  line-height:1.3;
  margin-bottom:14px;
}
.sec-head p{font-size:16px;color:var(--text-2);max-width:44ch;}
.sec-head.center p{margin-left:auto;margin-right:auto;}

/* ---------- stats ---------- */
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.stat-card{
  padding:24px 22px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft),var(--hl);
  transition:transform .22s ease,border-color .22s ease;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.stat-icon{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  border-radius:10px;
  margin-bottom:16px;
  color:var(--primary);
  background:rgba(47,227,200,.1);
  border:1px solid rgba(47,227,200,.2);
}
.stat-value{
  font-size:clamp(30px,3.6vw,40px);
  font-weight:700;
  line-height:1.1;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
}
.stat-value small{font-size:15px;font-weight:600;margin-left:4px;color:var(--text-2);}
.stat-name{margin:10px 0 0;font-size:14px;color:var(--text-2);}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:46px;max-width:880px;}
.timeline::before{
  content:"";
  position:absolute;
  left:15px;
  top:8px;
  bottom:8px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,rgba(47,227,200,.6),rgba(139,123,255,.28),rgba(255,255,255,.05));
}
.tl-item{position:relative;margin-bottom:24px;}
.tl-item:last-child{margin-bottom:0;}
.tl-node{
  position:absolute;
  left:-46px;
  top:6px;
  width:32px;
  height:32px;
  display:grid;
  place-items:center;
  border-radius:50%;
  font-size:13px;
  font-weight:700;
  color:var(--primary-ink);
  background:var(--primary);
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 6px rgba(47,227,200,.12),0 0 22px rgba(47,227,200,.45);
}
.tl-body{
  padding:22px 24px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft),var(--hl);
  transition:transform .22s ease,border-color .22s ease;
}
.tl-body:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.tl-body h3{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:600;
  margin-bottom:10px;
}
.tl-body h3 span{
  font-size:12px;
  font-weight:600;
  padding:3px 10px;
  border-radius:999px;
  color:var(--accent);
  background:rgba(139,123,255,.14);
  border:1px solid rgba(139,123,255,.28);
}
.tl-body > p{font-size:15px;color:var(--text-2);margin-bottom:14px;}
.tl-points{display:grid;gap:8px;}
.tl-points li{
  position:relative;
  padding-left:20px;
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
}
.tl-points li::before{
  content:"";
  position:absolute;
  left:2px;
  top:11px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 8px rgba(47,227,200,.6);
}

/* ---------- devices ---------- */
.device-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:24px;}
.device-main{
  position:relative;
  border-radius:var(--r-glass);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow),var(--hl);
  min-height:360px;
  display:flex;
  align-items:flex-end;
}
.device-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.device-main::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,11,18,.15),rgba(7,11,18,.88));
}
.device-main-body{position:relative;z-index:2;padding:30px 28px;}
.device-main-body h3{font-size:20px;margin-bottom:10px;color:#fff;}
.device-main-body p{font-size:14px;color:rgba(233,240,248,.82);max-width:44ch;margin:0;}
.device-side{display:grid;gap:24px;}
.device-card{
  padding:22px 22px 24px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft),var(--hl);
  display:flex;
  gap:16px;
  transition:transform .22s ease,border-color .22s ease;
}
.device-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.device-card img{
  width:88px;
  height:88px;
  flex:0 0 88px;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
}
.device-card h3{font-size:17px;margin-bottom:8px;}
.device-card p{font-size:14px;color:var(--text-2);margin:0;}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.check-card{
  padding:24px 22px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(139,123,255,.1),rgba(255,255,255,.02));
  box-shadow:var(--shadow-soft),var(--hl);
  transition:transform .22s ease,border-color .22s ease;
}
.check-card:hover{transform:translateY(-4px);border-color:rgba(139,123,255,.4);}
.check-card .check-no{
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:1px;
}
.check-card h3{font-size:17px;margin:10px 0 8px;}
.check-card p{font-size:14px;color:var(--text-2);margin:0;}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;}
.faq-item{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft),var(--hl);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item.is-open{border-color:rgba(47,227,200,.35);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 22px;
  border:0;
  background:transparent;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  text-align:left;
  cursor:pointer;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--primary);}
.faq-sign{
  position:relative;
  flex:0 0 22px;
  width:22px;
  height:22px;
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:13px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  transform:translate(-50%,-50%);
  transition:transform .2s ease,opacity .2s ease;
}
.faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-item.is-open .faq-sign::after{transform:translate(-50%,-50%) rotate(0);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a p{
  margin:0;
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.9;
  color:var(--text-2);
}
.faq-item.is-open .faq-q{border-left:2px solid var(--primary);padding-left:20px;}

/* ---------- pills + cta ---------- */
.rel-pills{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.pill-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:11px 20px;
  font-size:14px;
  font-weight:500;
  color:var(--text-2);
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  transition:color .2s ease,border-color .2s ease,background .2s ease,transform .2s ease;
}
.pill-link:hover{color:var(--primary);border-color:rgba(47,227,200,.4);background:rgba(47,227,200,.08);transform:translateY(-2px);}
.pill-link i{color:var(--primary);font-size:12px;}

.cta-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
  padding:24px 28px;
  border-radius:var(--r-glass);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-soft),var(--hl);
}
.cta-bar h3{font-size:18px;margin-bottom:6px;}
.cta-bar p{margin:0;font-size:14px;color:var(--text-2);}

/* ---------- footer ---------- */
.site-footer{
  margin-top:0;
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(13,20,32,.55),rgba(7,11,18,.95));
  padding:64px 0 26px;
}
.site-footer::before{
  content:"";
  display:block;
  height:1px;
  margin:-64px 0 60px;
  background:linear-gradient(90deg,rgba(47,227,200,0),rgba(47,227,200,.5),rgba(139,123,255,.3),rgba(47,227,200,0));
}
.footer-cols{padding-bottom:36px;}
.footer-brand-desc{
  margin:16px 0 18px;
  font-size:14px;
  line-height:1.85;
  color:var(--text-3);
  max-width:42ch;
}
.footer-contact{display:grid;gap:10px;}
.footer-contact li{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-2);}
.footer-contact i{color:var(--primary);font-size:13px;}
.footer-title{
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
  color:var(--text);
}
.footer-links{display:grid;gap:11px;}
.footer-links a{
  font-size:14px;
  color:var(--text-3);
  transition:color .18s ease,padding-left .18s ease;
}
.footer-links a:hover{color:var(--primary);padding-left:3px;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding-top:20px;
  border-top:1px solid var(--line-soft);
}
.footer-bottom p{margin:0;font-size:13px;color:var(--text-3);}
.to-top{
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  border-radius:50%;
  color:var(--primary-ink);
  background:var(--primary);
  box-shadow:var(--glow);
  transition:transform .2s ease,filter .2s ease;
}
.to-top:hover{transform:translateY(-3px);filter:brightness(1.08);color:var(--primary-ink);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--sec:80px;}
  .hero-grid{gap:36px;}
}
@media (max-width:1023px){
  :root{--sec:64px;}
  .nav-main .nav-search,
  .nav-main .nav-actions{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .brand-text{font-size:15px;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:40px;}
  .hero-sub{max-width:none;}
  .hero-float{left:12px;bottom:-18px;}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .device-grid{grid-template-columns:minmax(0,1fr);}
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  body::after{width:680px;height:520px;top:-240px;}
  .hero-cat{padding:40px 0 56px;}
  .hero-cat h1{font-size:clamp(26px,7vw,34px);}
  .hero-sub{font-size:16px;}
  .hero-cta .btn{flex:1 1 auto;}
  .hero-float{position:static;margin-top:14px;max-width:none;}
  .timeline{padding-left:34px;}
  .timeline::before{left:11px;}
  .tl-node{left:-34px;width:26px;height:26px;font-size:12px;box-shadow:0 0 0 4px rgba(47,227,200,.12),0 0 16px rgba(47,227,200,.4);}
  .tl-body{padding:18px 18px;}
  .device-card{flex-direction:column;}
  .device-card img{width:100%;height:150px;flex:none;}
  .cta-bar{flex-direction:column;align-items:flex-start;}
  .cta-bar .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  .container{padding:0 16px;}
  .stat-grid{grid-template-columns:minmax(0,1fr);}
  .check-grid{grid-template-columns:minmax(0,1fr);}
  .brand-text{font-size:14px;letter-spacing:0;}
  .trust-list{gap:12px;}
  .hero-cta{flex-direction:column;}
  .sec-head{margin-bottom:32px;}
}
@media print{
  body{background:#fff;color:#111;}
  .site-header,.cta-bar,.to-top{display:none;}
}

/* roulang page: category4 */
:root{
  --bg:#070B12;
  --bg-2:#0D1420;
  --primary:#2FE3C8;
  --primary-strong:#5BF0DA;
  --accent:#8B7BFF;
  --gold:#FFB85C;
  --text:#F2F6FA;
  --text-2:#A9B6C6;
  --text-3:#7C8899;
  --success:#34D399;
  --warning:#F5A524;
  --danger:#F4586B;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.06);
  --glass:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  --glass-flat:rgba(13,20,32,.86);
  --r-card:16px;
  --r-glass:20px;
  --r-img:14px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-top:inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 12px 36px rgba(47,227,200,.28);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 16% -10%, rgba(47,227,200,.12), transparent 62%),
    radial-gradient(720px 440px at 88% 2%, rgba(139,123,255,.09), transparent 66%),
    linear-gradient(rgba(255,255,255,.032) 1px, transparent 1px) 0 0/100% 40px,
    linear-gradient(90deg, rgba(255,255,255,.032) 1px, transparent 1px) 0 0/40px 100%;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img);}
a{color:var(--primary);text-decoration:none;border-bottom:1px solid rgba(47,227,200,.28);transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--primary-strong);border-bottom-color:var(--primary-strong);}
a.plain{border-bottom:0;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3;letter-spacing:.01em;}
h1{font-size:clamp(28px,4.4vw,48px);font-weight:800;line-height:1.18;}
h2{font-size:clamp(23px,3.2vw,34px);}
h3{font-size:18px;font-weight:600;}
p{margin:0 0 14px;}
ul{margin:0;padding:0;list-style:none;}
.button{border-radius:var(--r-btn);background:var(--primary);color:#04120F;font-weight:600;border:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:20px;padding-right:20px;}
.site-header,main,.site-footer{position:relative;z-index:1;}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-primary{background:var(--primary);color:#04120F;box-shadow:var(--glow);}
.btn-primary:hover{background:var(--primary-strong);color:#04120F;transform:translateY(-2px);box-shadow:0 16px 42px rgba(47,227,200,.34);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 22px rgba(47,227,200,.24);}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--primary);border-color:rgba(47,227,200,.42);}
.btn-ghost:hover{background:rgba(47,227,200,.12);color:var(--primary-strong);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-text{height:auto;padding:0;border-radius:0;background:none;color:var(--primary);border-bottom:1px solid rgba(47,227,200,.4);}
.btn-text:hover{color:var(--primary-strong);border-bottom-color:var(--primary-strong);gap:12px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,18,.74);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-2);
  transition:background .22s ease,box-shadow .22s ease;
}
.site-header.is-scrolled{background:rgba(7,11,18,.92);box-shadow:0 14px 40px rgba(0,0,0,.42);}
.nav-main{display:flex;align-items:center;gap:18px;padding:14px 0 12px;}
.brand{display:inline-flex;align-items:center;gap:10px;border-bottom:0;flex:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  color:var(--primary);
  background:linear-gradient(150deg, rgba(47,227,200,.20), rgba(139,123,255,.16));
  border:1px solid rgba(47,227,200,.30);
  box-shadow:var(--shadow-top);
}
.brand-text{font-size:17px;font-weight:700;color:var(--text);white-space:nowrap;}
.nav-search{
  flex:1 1 auto;max-width:520px;margin:0 auto;
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 6px 0 16px;
  border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,227,200,.14);}
.nav-search .search-icon{width:18px;height:18px;color:var(--text-3);flex:none;}
.nav-search input{
  flex:1 1 auto;height:100%;min-width:0;
  background:none;border:0;color:var(--text);font-size:14px;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{outline:none;}
.search-btn{
  height:36px;padding:0 16px;border:0;border-radius:9px;
  background:var(--primary);color:#04120F;font-size:14px;font-weight:600;cursor:pointer;
  transition:background .18s ease,transform .18s ease;
}
.search-btn:hover{background:var(--primary-strong);}
.search-btn:active{transform:scale(.97);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:none;}
.nav-toggle{
  display:none;width:44px;height:44px;flex:none;
  border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;
  padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;margin:3px auto;border-radius:2px;background:var(--text-2);transition:background .18s ease;}
.nav-toggle:hover span{background:var(--primary);}
.cat-nav{display:flex;gap:10px;padding:0 0 14px;flex-wrap:wrap;}
.cat-pill{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:var(--r-pill);
  font-size:14px;color:var(--text-2);
  background:rgba(255,255,255,.03);
  border:1px solid var(--line-2);
  transition:color .18s ease,border-color .18s ease,background .18s ease,transform .18s ease;
}
.cat-pill:hover{color:var(--primary);border-color:rgba(47,227,200,.38);transform:translateY(-1px);}
.cat-pill.active{
  color:#04120F;background:var(--primary);border-color:var(--primary);
  box-shadow:0 10px 30px rgba(47,227,200,.24);font-weight:600;
}
.mobile-panel{display:none;padding:0 0 18px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .nav-search{max-width:none;margin:0 0 14px;}
.mobile-links{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px;}
.mobile-actions{display:flex;gap:10px;flex-wrap:wrap;}

/* ============ 页面通用板块 ============ */
.section{padding:96px 0;border-top:1px solid var(--line-2);}
.section:first-of-type{border-top:0;}
.section-head{margin-bottom:40px;max-width:760px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;color:var(--primary);
  text-transform:uppercase;margin-bottom:12px;
}
.section-head .eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--primary),transparent);}
.section-head p{color:var(--text-2);font-size:15px;max-width:46ch;}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:var(--primary);
  background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.28);
  margin-bottom:18px;
}
.badge-accent{color:var(--accent);background:rgba(139,123,255,.12);border-color:rgba(139,123,255,.3);}
.badge-gold{color:var(--gold);background:rgba(255,184,92,.12);border-color:rgba(255,184,92,.3);}
.card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow),var(--shadow-top);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.no-backdrop .card{background:var(--glass-flat);}
@supports not ((backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px))){
  .card,.sticky-card,.qa-card,.convert-bar,.mini-note{background:var(--glass-flat);}
}

/* ============ 分类页 Banner ============ */
.page-hero{
  position:relative;
  padding:74px 0 66px;
  border-bottom:1px solid var(--line-2);
  background-image:
    linear-gradient(120deg, rgba(7,11,18,.92) 0%, rgba(7,11,18,.80) 52%, rgba(7,11,18,.94) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),rgba(139,123,255,.35),transparent);
}
.page-hero .grid-x{align-items:center;}
.hero-lead{font-size:17px;color:var(--text-2);max-width:44ch;margin:16px 0 22px;}
.hero-marks{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:26px;}
.hero-marks li{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.hero-marks i{color:var(--primary);font-size:13px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;}
.hero-figure{
  margin:0;
  border-radius:var(--r-glass);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--shadow-top);
  position:relative;
}
.hero-figure img{width:100%;height:320px;object-fit:cover;border-radius:0;}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 18px;font-size:13px;color:var(--text-2);
  background:linear-gradient(180deg, rgba(7,11,18,0), rgba(7,11,18,.86));
}

/* ============ 范围索引 ============ */
.scope-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px;}
.scope-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:12px;font-size:14px;color:var(--text-2);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line-2);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.scope-chip:hover{color:var(--primary);border-color:rgba(47,227,200,.35);background:rgba(47,227,200,.08);}
.scope-chip i{font-size:13px;color:var(--primary);}

/* ============ 问答清单 ============ */
.qa-grid{margin-top:-24px;}
.qa-card{
  height:calc(100% - 0px);
  display:flex;flex-direction:column;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--shadow),var(--shadow-top);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.qa-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.qa-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;flex:none;
  font-size:13px;font-weight:700;color:var(--primary);
  background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.26);
  font-variant-numeric:tabular-nums;
  margin-bottom:14px;
}
.qa-card h3{font-size:17px;margin-bottom:10px;line-height:1.55;}
.qa-card p{font-size:15px;color:var(--text-2);margin-bottom:12px;}
.qa-points{margin-top:auto;border-top:1px dashed var(--line);padding-top:12px;}
.qa-points li{
  position:relative;padding-left:16px;
  font-size:14px;color:var(--text-3);line-height:1.9;
}
.qa-points li::before{
  content:"";position:absolute;left:0;top:.85em;
  width:5px;height:5px;border-radius:50%;background:var(--accent);
}
.sticky-card{
  position:sticky;top:132px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-glass);
  padding:26px;
  box-shadow:var(--shadow),var(--shadow-top);
}
.sticky-card h3{font-size:19px;margin-bottom:12px;}
.sticky-card p{font-size:14px;color:var(--text-2);}
.mini-list{margin:18px 0;}
.mini-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--text-2);
  padding:10px 0;border-bottom:1px solid var(--line-2);
}
.mini-list li:last-child{border-bottom:0;}
.mini-list i{color:var(--primary);margin-top:5px;font-size:13px;}
.sticky-card .btn{width:100%;justify-content:center;}
.mini-note{
  margin-top:14px;padding:12px 14px;border-radius:12px;
  font-size:13px;color:var(--text-3);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line-2);
}

/* ============ 反馈说明（非对称 bento） ============ */
.bento{display:grid;gap:24px;grid-template-columns:repeat(12,1fr);}
.bento .b-lg{grid-column:span 5;}
.bento .b-md{grid-column:span 4;}
.bento .b-sm{grid-column:span 3;}
.bento-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow),var(--shadow-top);
  transition:transform .2s ease,border-color .2s ease;
}
.bento-card:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.35);}
.bento-card h3{font-size:18px;margin-bottom:10px;}
.bento-card p{font-size:15px;color:var(--text-2);margin-bottom:0;}
.bento-card .num{
  font-size:40px;font-weight:700;color:var(--gold);
  font-variant-numeric:tabular-nums;line-height:1.1;margin-bottom:6px;
}
.bento-card .num small{font-size:14px;color:var(--text-3);font-weight:400;margin-left:6px;}
.bento-card .icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  color:var(--primary);background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.24);margin-bottom:16px;
}

/* ============ 相关分类 pill ============ */
.rel-grid{display:flex;flex-wrap:wrap;gap:14px;}
.rel-pill{
  flex:1 1 240px;
  display:flex;align-items:center;gap:14px;
  padding:18px 20px;border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  color:var(--text);
  box-shadow:var(--shadow-top);
  transition:transform .2s ease,border-color .2s ease,background .2s ease;
}
.rel-pill:hover{transform:translateY(-4px);border-color:rgba(47,227,200,.38);background:rgba(47,227,200,.06);color:var(--text);}
.rel-pill .ico{
  width:42px;height:42px;flex:none;border-radius:12px;display:grid;place-items:center;
  color:var(--primary);background:rgba(47,227,200,.12);border:1px solid rgba(47,227,200,.22);
}
.rel-pill .txt strong{display:block;font-size:15px;font-weight:600;color:var(--text);}
.rel-pill .txt span{display:block;font-size:13px;color:var(--text-3);line-height:1.7;}
.rel-pill .arrow{margin-left:auto;color:var(--text-3);transition:transform .2s ease,color .2s ease;}
.rel-pill:hover .arrow{transform:translateX(4px);color:var(--primary);}

/* ============ 转化条 ============ */
.convert-bar{
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  padding:26px 30px;
  border-radius:var(--r-glass);
  background:linear-gradient(120deg, rgba(47,227,200,.12), rgba(139,123,255,.10));
  border:1px solid rgba(47,227,200,.26);
  box-shadow:var(--shadow),var(--shadow-top);
  margin-top:28px;
}
.convert-bar .txt{flex:1 1 340px;}
.convert-bar h2{font-size:22px;margin-bottom:6px;}
.convert-bar p{margin:0;font-size:14px;color:var(--text-2);}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:0;
  border-top:1px solid var(--line-2);
  background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(0,0,0,0));
  padding:70px 0 26px;
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.5),rgba(139,123,255,.35),transparent);
}
.footer-cols{padding-bottom:34px;}
.footer-brand-desc{font-size:14px;color:var(--text-3);max-width:40ch;margin-top:16px;}
.footer-contact{margin-top:14px;}
.footer-contact li{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-3);padding:5px 0;}
.footer-contact i{color:var(--primary);font-size:13px;}
.footer-title{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text);}
.footer-links li{padding:6px 0;}
.footer-links a{font-size:14px;color:var(--text-3);border-bottom:0;transition:color .18s ease,padding-left .18s ease;}
.footer-links a:hover{color:var(--primary);padding-left:4px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;border-top:1px solid var(--line-2);
}
.footer-bottom p{margin:0;font-size:13px;color:var(--text-3);}
.to-top{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  color:#04120F;background:var(--primary);border-bottom:0;
  box-shadow:var(--glow);
  transition:transform .2s ease,background .2s ease;
}
.to-top:hover{background:var(--primary-strong);color:#04120F;transform:translateY(-3px);}

/* ============ 响应式 ============ */
@media screen and (max-width:1199px){
  .section{padding:80px 0;}
}
@media screen and (max-width:1023px){
  .nav-search{display:none;}
  .nav-actions{display:none;}
  .nav-toggle{display:grid;margin-left:auto;}
  .cat-nav{
    overflow-x:auto;flex-wrap:nowrap;padding-bottom:12px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;
    -webkit-mask-image:linear-gradient(90deg,transparent,#000 16px,#000 calc(100% - 16px),transparent);
    mask-image:linear-gradient(90deg,transparent,#000 16px,#000 calc(100% - 16px),transparent);
  }
  .cat-nav::-webkit-scrollbar{display:none;}
  .cat-pill{flex:none;}
  .section{padding:64px 0;}
  .sticky-card{position:static;top:auto;margin-top:24px;}
  .bento{gap:18px;}
  .bento .b-lg,.bento .b-md,.bento .b-sm{grid-column:span 12;}
  .hero-figure img{height:260px;}
  .page-hero{padding:56px 0 50px;}
  .hero-figure{margin-top:28px;}
}
@media screen and (max-width:640px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:48px 0;}
  h1{font-size:28px;}
  .brand-text{font-size:15px;}
  .brand-mark{width:34px;height:34px;border-radius:10px;}
  .hero-lead{font-size:15px;}
  .hero-marks{gap:12px;}
  .hero-cta .btn{width:100%;justify-content:center;}
  .card,.qa-card,.sticky-card,.bento-card,.convert-bar{padding:20px;}
  .bento-card .num{font-size:34px;}
  .convert-bar{padding:20px;}
  .convert-bar .btn{width:100%;justify-content:center;}
  .footer-bottom{justify-content:center;text-align:center;}
}
@media print{
  body::before{display:none;}
  .site-header,.site-footer,.to-top{display:none;}
  body{background:#fff;color:#000;}
}