/* roulang page: index */
:root{
  --bg:#070B14;
  --panel:#0E1524;
  --float:rgba(255,255,255,.04);
  --primary:#23D3C8;
  --primary-dark:#12A79E;
  --accent:#FFB05C;
  --text:#E7EEF9;
  --text-2:#98A8C0;
  --text-3:#6C7C93;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius:16px;
  --radius-sm:12px;
  --pill:999px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --container:1240px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease;}
a:hover{color:var(--primary);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(35,211,200,.28);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;position:relative;}
.section--tight{padding:72px 0;}
.section--alt{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,0));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.grid-bg{background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:64px 64px;opacity:.35;position:absolute;inset:0;pointer-events:none;}

.section-head{max-width:760px;margin-bottom:48px;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:2px;color:var(--primary);text-transform:uppercase;margin-bottom:14px;}
.section-head .eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);display:block;border-radius:2px;}
.section-head h2{font-size:clamp(26px,2.6vw,34px);}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15px;max-width:620px;}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:70;background:rgba(7,11,20,.72);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;}
.site-header.is-scrolled{background:rgba(7,11,20,.94);border-bottom-color:var(--line);box-shadow:0 10px 32px rgba(0,0,0,.42);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:700;font-size:18px;color:#04211F;background:linear-gradient(135deg,var(--primary),var(--primary-dark));box-shadow:0 0 0 1px rgba(35,211,200,.35),0 8px 22px rgba(35,211,200,.18);}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;font-weight:600;letter-spacing:.5px;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:1.4px;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{position:relative;padding:10px 14px;font-size:15px;color:var(--text-2);border-radius:var(--radius-sm);}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .28s ease;box-shadow:0 0 12px rgba(35,211,200,.7);}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--text);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-extra{display:flex;align-items:center;gap:14px;}
.mega-wrap{position:relative;}
.mega-trigger{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;font-size:14px;color:var(--text-2);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--float);transition:.25s ease;}
.mega-trigger:hover{color:var(--text);border-color:var(--line-strong);}
.mega-trigger .caret{width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .25s ease;}
.mega-wrap.is-open .mega-trigger .caret{transform:rotate(-135deg) translateY(-1px);}
.mega-panel{position:absolute;right:0;top:calc(100% + 14px);width:640px;padding:26px;border-radius:var(--radius);background:rgba(14,21,36,.86);backdrop-filter:blur(18px);border:1px solid var(--line-strong);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .25s ease,transform .25s ease,visibility .25s;display:grid;grid-template-columns:1.1fr 1fr .8fr;gap:22px;}
.mega-panel::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(35,211,200,.6),transparent);}
.mega-wrap:hover .mega-panel,.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col h4{font-size:13px;color:var(--text-3);letter-spacing:1.6px;text-transform:uppercase;margin-bottom:14px;font-weight:600;}
.mega-col a{display:block;font-size:14px;color:var(--text-2);padding:8px 10px;border-radius:8px;border-left:2px solid transparent;transition:.22s ease;}
.mega-col a:hover{color:var(--text);background:rgba(35,211,200,.09);border-left-color:var(--primary);}
.mega-col .mega-title{font-size:14.5px;color:var(--text);}
.mega-col .mega-sub{font-size:12.5px;color:var(--text-3);}
.mega-card{display:block;padding:14px;border-radius:12px;border:1px solid var(--line);background:var(--float);margin-bottom:10px;}
.mega-card:hover{border-color:rgba(35,211,200,.45);color:var(--text);}
.menu-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--float);position:relative;}
.menu-toggle span{position:absolute;left:11px;right:11px;height:1.6px;background:var(--text);border-radius:2px;transition:.25s ease;}
.menu-toggle span:nth-child(1){top:14px;}
.menu-toggle span:nth-child(2){top:20px;}
.menu-toggle span:nth-child(3){top:26px;}
.menu-toggle.is-active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.menu-toggle.is-active span:nth-child(2){opacity:0;}
.menu-toggle.is-active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .3s ease,box-shadow .3s ease,background-color .3s ease,border-color .3s ease,color .3s ease;}
.btn-primary{background:var(--accent);color:#241505;box-shadow:0 6px 20px rgba(255,176,92,.24);}
.btn-primary:hover{transform:translateY(-2px);color:#241505;box-shadow:0 0 0 1px rgba(255,176,92,.4),0 0 26px rgba(255,176,92,.28);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,176,92,.3);}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong);}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(35,211,200,.6);color:var(--primary);box-shadow:0 0 0 1px rgba(35,211,200,.28),0 0 22px rgba(35,211,200,.18);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-lg{padding:15px 28px;font-size:16px;}
.btn[disabled],.btn.is-disabled{opacity:.6;filter:saturate(.6);cursor:not-allowed;transform:none;}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--pill);font-size:12.5px;color:var(--primary);background:rgba(35,211,200,.12);border:1px solid rgba(35,211,200,.2);}
.badge--warm{color:var(--accent);background:rgba(255,176,92,.12);border-color:rgba(255,176,92,.22);}
.badge--mute{color:var(--text-3);background:rgba(255,255,255,.05);border-color:var(--line);}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(7,11,20,.94) 0%,rgba(7,11,20,.82) 42%,rgba(7,11,20,.62) 100%);}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:72px 72px;opacity:.5;}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding:104px 0 96px;}
.hero-copy{max-width:660px;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--pill);font-size:13px;color:var(--text-2);background:rgba(255,255,255,.05);border:1px solid var(--line);margin-bottom:22px;}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary);display:block;}
.hero h1{font-size:clamp(34px,4.2vw,54px);line-height:1.22;letter-spacing:.4px;}
.hero h1 .hl{color:var(--primary);}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:38px;}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-2);}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(35,211,200,.8);}
.hero-card{position:relative;padding:30px;border-radius:var(--radius);background:rgba(14,21,36,.72);backdrop-filter:blur(16px);border:1px solid var(--line-strong);box-shadow:var(--shadow);}
.hero-card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(35,211,200,.75),transparent);}
.hero-card h3{font-size:16px;margin-bottom:6px;}
.hero-card .card-note{font-size:13px;color:var(--text-3);}
.hero-stat{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line);}
.hero-stat:last-of-type{border-bottom:0;}
.hero-stat .hs-label{font-size:14px;color:var(--text-2);}
.hero-stat .hs-value{font-family:var(--mono);font-size:26px;color:var(--text);}
.hero-stat .hs-value small{font-size:12px;color:var(--text-3);margin-left:4px;}
.hero-card-foot{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--text-3);}

/* ============ 指标看板 ============ */
.metrics{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.metric{padding:34px 26px;border-left:1px solid var(--line);position:relative;}
.metric:first-child{border-left:0;}
.metric::before{content:"";position:absolute;left:0;right:0;top:-1px;height:1px;background:linear-gradient(90deg,transparent,rgba(35,211,200,.55),transparent);opacity:.7;}
.metric-value{font-family:var(--mono);font-size:clamp(32px,3.3vw,46px);line-height:1.1;color:var(--text);letter-spacing:-.5px;}
.metric-value sup{font-size:14px;color:var(--primary);margin-left:4px;top:-14px;position:relative;font-family:var(--sans);}
.metric-value.is-up{color:var(--accent);}
.metric-label{margin-top:10px;font-size:14px;color:var(--text-2);}
.metric-note{margin-top:6px;font-size:12px;color:var(--text-3);}

/* ============ 服务矩阵 ============ */
.services-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.svc{position:relative;padding:26px 24px 24px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);border-left:3px solid rgba(35,211,200,.85);transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;overflow:hidden;}
.svc:nth-child(-n+4){grid-column:span 3;}
.svc:nth-child(n+5){grid-column:span 6;padding:30px 28px;}
.svc:hover{transform:translateY(-2px);border-color:rgba(35,211,200,.5);box-shadow:0 12px 34px rgba(0,0,0,.4);}
.svc-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(35,211,200,.12);color:var(--primary);font-size:18px;font-weight:700;margin-bottom:16px;border:1px solid rgba(35,211,200,.2);}
.svc h3{font-size:18px;}
.svc p{margin-top:8px;font-size:14px;color:var(--text-2);}
.svc .svc-more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13.5px;color:var(--primary);}
.svc .svc-more::after{content:"→";transition:transform .25s ease;}
.svc:hover .svc-more::after{transform:translateX(4px);}

/* ============ 对比 ============ */
.compare-wrap{display:grid;grid-template-columns:1fr;gap:26px;}
.compare-head{display:grid;grid-template-columns:170px 1fr 1fr 110px;gap:20px;font-size:13px;color:var(--text-3);letter-spacing:1px;}
.compare-head span:nth-child(2){color:var(--text-3);}
.compare-head span:nth-child(3){color:var(--primary);}
.compare-row{display:grid;grid-template-columns:170px 1fr 1fr 110px;gap:20px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line);}
.compare-row:last-child{border-bottom:0;}
.cr-label{font-size:14.5px;color:var(--text-2);}
.bar{height:10px;border-radius:var(--pill);background:rgba(255,255,255,.05);overflow:hidden;}
.bar i{display:block;height:100%;border-radius:var(--pill);}
.bar--left i{background:linear-gradient(90deg,#2C3752,#3D4C6E);}
.bar--right i{background:linear-gradient(90deg,var(--primary-dark),var(--primary));box-shadow:0 0 16px rgba(35,211,200,.35);}
.cr-delta{font-family:var(--mono);font-size:15px;color:var(--accent);text-align:right;}

/* ============ 最新信息 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{display:flex;gap:16px;padding:20px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);border-left:3px solid rgba(35,211,200,.7);transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;}
.news-card:hover{transform:translateY(-2px);border-color:rgba(35,211,200,.45);box-shadow:0 12px 32px rgba(0,0,0,.4);}
.news-thumb{width:96px;height:60px;flex-shrink:0;border-radius:10px;overflow:hidden;background:var(--float);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body{min-width:0;display:flex;flex-direction:column;}
.news-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{margin-top:8px;font-size:13.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:12.5px;color:var(--text-3);}
.news-meta time{font-family:var(--mono);}
.empty-state{grid-column:1/-1;padding:56px 24px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--radius);background:var(--float);}
.empty-state .es-icon{width:56px;height:56px;margin:0 auto 16px;border-radius:16px;display:grid;place-items:center;border:1px solid rgba(35,211,200,.25);color:var(--primary);font-family:var(--mono);font-size:20px;}
.empty-state p{color:var(--text-2);font-size:15px;}
.empty-state a{display:inline-block;margin-top:18px;font-size:14px;color:var(--primary);}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 4px;font-size:16.5px;font-weight:600;cursor:pointer;list-style:none;transition:color .25s ease;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-family:var(--mono);font-size:22px;color:var(--primary);transition:transform .3s ease;line-height:1;}
.faq-item[open] summary{color:var(--primary);}
.faq-item[open] summary::after{transform:rotate(90deg);}
.faq-item .faq-body{padding:0 4px 24px;font-size:15px;color:var(--text-2);max-width:880px;}

/* ============ 表单 ============ */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start;}
.contact-side h2{font-size:clamp(26px,2.6vw,34px);}
.contact-side p{margin-top:16px;color:var(--text-2);font-size:15px;}
.contact-list{margin-top:28px;display:grid;gap:14px;}
.contact-list li{display:flex;gap:12px;font-size:14.5px;color:var(--text-2);}
.contact-list li b{color:var(--text);font-weight:600;min-width:76px;}
.form-panel{padding:32px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:8px;}
.field input,.field select,.field textarea{width:100%;padding:0 14px;height:48px;border-radius:var(--radius-sm);background:rgba(255,255,255,.03);border:1px solid var(--line);color:var(--text);transition:border-color .25s ease,box-shadow .25s ease,background-color .25s ease;}
.field textarea{height:120px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:rgba(35,211,200,.65);box-shadow:0 0 0 3px rgba(35,211,200,.14);background:rgba(255,255,255,.05);}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-2) 50%),linear-gradient(135deg,var(--text-2) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--text-2);margin:6px 0 22px;}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--primary);}
.form-note{font-size:12.5px;color:var(--text-3);margin-top:14px;}
.form-status{display:none;margin-top:16px;padding:12px 16px;border-radius:var(--radius-sm);font-size:14px;border:1px solid transparent;}
.form-status.is-ok{display:block;color:var(--primary);background:rgba(35,211,200,.1);border-color:rgba(35,211,200,.3);}
.form-status.is-err{display:block;color:var(--accent);background:rgba(255,176,92,.1);border-color:rgba(255,176,92,.3);}

/* ============ CTA 条 ============ */
.cta-bar{position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding:34px 36px;border-radius:var(--radius);background:rgba(14,21,36,.78);backdrop-filter:blur(14px);border:1px solid var(--line-strong);overflow:hidden;}
.cta-bar::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(35,211,200,.7),transparent);}
.cta-bar h2{font-size:clamp(22px,2.2vw,28px);}
.cta-bar p{margin-top:8px;font-size:14.5px;color:var(--text-2);}

/* ============ 页脚 ============ */
.site-footer{margin-top:0;background:#050810;border-top:1px solid var(--line);position:relative;}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(35,211,200,.55),transparent);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding:72px 0 56px;}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);max-width:320px;}
.footer-brand .brand{margin-bottom:6px;}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:18px;letter-spacing:.6px;}
.footer-col a,.footer-col li{display:block;font-size:14px;color:var(--text-2);padding:6px 0;}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 状态样式 ============ */
.skeleton-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.skeleton{height:104px;border-radius:var(--radius);background:linear-gradient(90deg,rgba(255,255,255,.04),rgba(255,255,255,.08),rgba(255,255,255,.04));background-size:200% 100%;animation:sk 1.6s infinite linear;}
@keyframes sk{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .header-inner{gap:16px;}
  .nav-link{padding:10px 10px;font-size:14.5px;}
  .hero-inner{grid-template-columns:1fr;gap:44px;padding:84px 0 76px;}
  .hero-card{max-width:560px;}
  .metrics{grid-template-columns:repeat(3,1fr);}
  .metric:nth-child(4){border-left:0;}
  .svc:nth-child(-n+4){grid-column:span 6;}
  .services-grid{gap:20px;}
}
@media (max-width:992px){
  .main-nav{position:fixed;top:76px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;padding:18px 20px 26px;background:rgba(7,11,20,.98);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);transform:translateY(-12px);opacity:0;visibility:hidden;transition:.28s ease;max-height:calc(100vh - 76px);overflow-y:auto;}
  .main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible;}
  .nav-link{padding:14px 12px;font-size:15.5px;border-radius:10px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:rgba(35,211,200,.1);color:var(--primary);}
  .menu-toggle{display:block;}
  .mega-panel{position:static;width:100%;grid-template-columns:1fr;margin-top:10px;transform:none;box-shadow:none;}
  .section{padding:72px 0;}
  .contact-grid{grid-template-columns:1fr;gap:32px;}
  .compare-head,.compare-row{grid-template-columns:130px 1fr 1fr 80px;gap:12px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .skeleton-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .hero h1{font-size:clamp(28px,7vw,38px);}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric{border-left:1px solid var(--line);}
  .metric:nth-child(odd){border-left:0;}
  .svc:nth-child(-n+4),.svc:nth-child(n+5){grid-column:span 12;}
  .news-grid{grid-template-columns:1fr;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:1fr;gap:8px;padding:18px 0;}
  .cr-delta{text-align:left;}
  .footer-grid{grid-template-columns:1fr;padding:56px 0 40px;}
  .cta-bar{padding:26px 22px;}
  .skeleton-grid{grid-template-columns:1fr;}
}
@media (max-width:560px){
  body{font-size:15px;line-height:1.85;}
  .section{padding:56px 0;}
  .hero-inner{padding:64px 0 56px;}
  .hero-actions .btn{width:100%;}
  .form-row{grid-template-columns:1fr;}
  .form-panel{padding:22px;}
  .news-card{flex-direction:column;}
  .news-thumb{width:100%;height:150px;}
  .brand-text em{display:none;}
  .metrics{grid-template-columns:1fr;}
  .metric{border-left:0;}
}

/* roulang page: category1 */
:root{
  --bg:#070B14;
  --bg-2:#0A101C;
  --panel:#0E1524;
  --elev:rgba(255,255,255,.04);
  --primary:#23D3C8;
  --primary-dark:#12A79E;
  --accent:#FFB05C;
  --text:#E7EEF9;
  --text-2:#98A8C0;
  --text-3:#6C7C93;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(35,211,200,.35);
  --radius:16px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --container:1240px;
  --font: "Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono: ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::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:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .25s ease;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;letter-spacing:.2px;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text);}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(35,211,200,.3);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--primary);margin-bottom:16px;font-family:var(--mono);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);display:inline-block;}
h2.section-title{font-size:clamp(26px,3vw,34px);}
.section-desc{color:var(--text-2);font-size:15.5px;margin-top:16px;max-width:680px;line-height:1.85;}
.center .section-desc{margin-left:auto;margin-right:auto;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease;
}
.site-header.is-scrolled{background:rgba(7,11,20,.94);border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;gap:28px;height:74px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(35,211,200,.9),rgba(18,167,158,.6));
  color:#04201F;font-weight:700;font-size:19px;
  box-shadow:0 0 0 1px rgba(35,211,200,.3),0 6px 20px rgba(35,211,200,.18);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16.5px;letter-spacing:.4px;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.28em;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);white-space:nowrap;
  transition:color .25s ease,background .25s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-link.is-active{color:var(--text);}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 12px rgba(35,211,200,.7);
}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}

/* mega */
.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);color:var(--text-2);font-size:14px;
  transition:color .25s ease,border-color .25s ease,background .25s ease;
}
.mega-trigger:hover{color:var(--text);border-color:var(--line-strong);background:rgba(35,211,200,.06);}
.mega-trigger .caret{font-size:10px;transition:transform .25s ease;}
.mega-wrap:hover .mega-trigger .caret,.mega-wrap.open .mega-trigger .caret{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:680px;
  padding:26px;border-radius:20px;
  background:rgba(14,21,36,.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(0,0,0,.6);
  display:grid;grid-template-columns:1.1fr 1.2fr 1fr;gap:24px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.mega-wrap:hover .mega-panel,.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col h4{font-size:12px;letter-spacing:.16em;color:var(--text-3);text-transform:uppercase;margin-bottom:14px;font-family:var(--mono);}
.mega-col a.mega-link{
  display:block;padding:10px 12px;border-radius:10px;font-size:14.5px;color:var(--text-2);
  border-left:2px solid transparent;transition:all .22s ease;
}
.mega-col a.mega-link:hover{background:rgba(35,211,200,.08);border-left-color:var(--primary);color:var(--text);}
.mega-col a.mega-link span{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px;}
.mega-card{
  display:block;padding:16px;border-radius:14px;background:var(--elev);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.mega-card:hover{border-color:var(--line-strong);transform:translateY(-2px);}
.mega-card strong{display:block;font-size:14.5px;margin-bottom:6px;}
.mega-card span{font-size:12.5px;color:var(--text-3);line-height:1.6;}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle i{display:block;width:17px;height:1.6px;background:var(--text-2);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.open i:nth-child(1){transform:translateY(6.6px) rotate(45deg);}
.nav-toggle.open i:nth-child(2){opacity:0;}
.nav-toggle.open i:nth-child(3){transform:translateY(-6.6px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 24px;height:48px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:transform .3s ease,box-shadow .3s ease,background .3s ease,color .3s ease,border-color .3s ease;
}
.btn-primary{
  background:var(--accent);color:#231303;
  box-shadow:0 6px 20px rgba(255,176,92,.22);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,92,.4),0 0 24px rgba(255,176,92,.32);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 12px rgba(255,176,92,.2);}
.btn-ghost{
  background:transparent;color:var(--text);border:1px solid var(--line);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--primary);color:var(--primary);box-shadow:0 0 0 1px rgba(35,211,200,.35),0 0 24px rgba(35,211,200,.2);}
.btn-ghost:active{transform:translateY(1px);box-shadow:none;}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn[disabled],.btn:disabled{opacity:.6;filter:saturate(.4);cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:92px 0 84px;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,11,20,.94) 0%,rgba(7,11,20,.86) 42%,rgba(7,11,20,.62) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
}
.hero .container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--text-3);margin-bottom:26px;flex-wrap:wrap;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);opacity:.6;}
.breadcrumb .current{color:var(--text-2);}
.hero h1{
  font-size:clamp(32px,4.4vw,52px);
  line-height:1.24;letter-spacing:.4px;max-width:900px;
}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{
  margin-top:20px;font-size:17px;color:var(--text-2);max-width:640px;line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:14px;margin-top:44px;}
.fact-chip{
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);
}
.fact-chip b{font-family:var(--mono);color:var(--primary);font-size:15px;font-weight:600;}

/* ---------- intro split ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;}
.split-media{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:16/9;
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,20,.05),rgba(7,11,20,.55));
}
.prose p{color:var(--text-2);line-height:1.9;font-size:15.5px;}
.prose strong{color:var(--text);font-weight:600;}
.inline-points{margin-top:26px;display:grid;gap:14px;}
.inline-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2);}
.inline-points li::before{
  content:"";flex-shrink:0;width:8px;height:8px;margin-top:9px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(35,211,200,.6);
}

/* ---------- capability two column ---------- */
.cap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;}
.cap-item{
  padding:26px 0 26px 20px;border-top:1px solid var(--line);position:relative;
}
.cap-item::before{
  content:"";position:absolute;left:0;top:30px;width:3px;height:26px;border-radius:3px;
  background:var(--primary);opacity:.9;
}
.cap-item h3{font-size:18px;margin-bottom:8px;}
.cap-item p{color:var(--text-2);font-size:14.5px;margin:0;line-height:1.85;}

/* ---------- metric band ---------- */
.metric-band{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.metric-cell{
  padding:40px 32px;position:relative;
}
.metric-cell + .metric-cell{border-left:1px solid var(--line);}
.metric-cell::before{
  content:"";position:absolute;top:0;left:32px;width:52px;height:1px;
  background:var(--primary);box-shadow:0 0 14px rgba(35,211,200,.8);
}
.metric-value{
  font-family:var(--mono);font-size:clamp(34px,4vw,46px);font-weight:600;
  line-height:1.1;letter-spacing:-1px;color:var(--text);
}
.metric-value .unit{font-size:.42em;color:var(--text-2);margin-left:6px;letter-spacing:0;}
.metric-value.is-trend{color:var(--accent);}
.metric-label{font-size:15px;margin-top:12px;color:var(--text);}
.metric-note{font-size:12.5px;color:var(--text-3);margin-top:6px;line-height:1.7;}

/* ---------- scenario cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene-card{
  border-radius:var(--radius);overflow:hidden;background:var(--panel);
  border:1px solid var(--line);position:relative;
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.scene-card:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow);}
.scene-card .thumb{aspect-ratio:21/9;overflow:hidden;position:relative;}
.scene-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.scene-card:hover .thumb img{transform:scale(1.04);}
.scene-card .body{padding:26px 26px 28px;}
.scene-card h3{font-size:19px;margin-bottom:10px;}
.scene-card p{color:var(--text-2);font-size:14.5px;margin:0;line-height:1.85;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--radius-pill);
  font-size:12.5px;color:var(--primary);background:rgba(35,211,200,.12);
  border:1px solid rgba(35,211,200,.18);letter-spacing:.2px;
}
.badge.warm{color:var(--accent);background:rgba(255,176,92,.12);border-color:rgba(255,176,92,.2);}
.badge.muted{color:var(--text-2);background:rgba(255,255,255,.05);border-color:var(--line);}

/* ---------- article placeholder cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);overflow:hidden;
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.post-card:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow);}
.post-card .cover{aspect-ratio:16/9;overflow:hidden;}
.post-card .cover img{width:100%;height:100%;object-fit:cover;}
.post-card .content{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.post-card h3{font-size:17.5px;line-height:1.5;margin-bottom:10px;}
.post-card p{font-size:14px;color:var(--text-2);line-height:1.8;margin:0 0 18px;}
.post-meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--text-3);font-family:var(--mono);
}
.link-arrow{color:var(--primary);font-size:13px;font-family:var(--font);display:inline-flex;align-items:center;gap:6px;}
.post-card:hover .link-arrow{gap:10px;transition:gap .25s ease;}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;text-align:left;font-size:16.5px;font-weight:600;color:var(--text);
  transition:color .25s ease;
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;border:1px solid var(--line);color:var(--text-2);
  font-size:15px;line-height:1;transition:transform .3s ease,color .3s ease,border-color .3s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--primary);border-color:var(--line-strong);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a p{padding:0 4px 24px;margin:0;color:var(--text-2);font-size:15px;line-height:1.85;max-width:820px;}

/* ---------- contact / cta ---------- */
.cta-panel{
  position:relative;border-radius:24px;padding:56px;
  background:linear-gradient(120deg,rgba(35,211,200,.14),rgba(14,21,36,.9) 45%,rgba(14,21,36,.95));
  border:1px solid var(--line);overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:56px;width:88px;height:1px;
  background:var(--primary);box-shadow:0 0 16px rgba(35,211,200,.9);
}
.cta-inner{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start;}
.cta-copy h2{font-size:clamp(24px,2.6vw,32px);line-height:1.35;}
.cta-copy p{color:var(--text-2);margin-top:16px;font-size:15.5px;}
.cta-list{margin-top:24px;display:grid;gap:12px;}
.cta-list li{font-size:14.5px;color:var(--text-2);display:flex;gap:10px;align-items:flex-start;}
.cta-list li::before{content:"✓";color:var(--primary);font-size:13px;margin-top:2px;}
.form{
  background:rgba(7,11,20,.55);border:1px solid var(--line);border-radius:18px;padding:30px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;padding:0 14px;height:48px;border-radius:10px;
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  transition:border-color .25s ease,box-shadow .25s ease;
}
.field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(35,211,200,.14);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-2) 50%),linear-gradient(135deg,var(--text-2) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--text-3);line-height:1.7;margin:6px 0 20px;}
.consent input{width:16px;height:16px;margin-top:3px;flex-shrink:0;accent-color:var(--primary);}
.form .btn{width:100%;}
.form-status{display:none;margin-top:16px;padding:12px 16px;border-radius:10px;font-size:13.5px;}
.form-status.ok{display:block;background:rgba(35,211,200,.12);border:1px solid rgba(35,211,200,.3);color:var(--primary);}
.form-status.err{display:block;background:rgba(255,176,92,.12);border:1px solid rgba(255,176,92,.3);color:var(--accent);}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);background:var(--bg-2);
  padding:72px 0 0;margin-top:8px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;width:220px;height:1px;
  background:linear-gradient(90deg,var(--primary),transparent);
  box-shadow:0 0 16px rgba(35,211,200,.6);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand p{color:var(--text-2);font-size:14px;margin-top:20px;max-width:340px;line-height:1.85;}
.footer-col h4{font-size:14.5px;margin-bottom:18px;letter-spacing:.4px;}
.footer-col a,.footer-col li{display:block;font-size:14px;color:var(--text-2);margin-bottom:12px;line-height:1.7;}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 30px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a:hover{color:var(--primary);}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .container{padding:0 22px;}
  .mega-panel{width:600px;}
  .hero{padding:78px 0 70px;}
  .split{gap:40px;}
}
@media (max-width:992px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:16px 22px 22px;margin:0;
    background:rgba(10,16,28,.98);
    backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height .35s ease,opacity .25s ease,visibility .25s ease;
  }
  .main-nav.open{max-height:420px;opacity:1;visibility:visible;padding-top:16px;}
  .nav-link{padding:14px 12px;border-radius:10px;font-size:15.5px;}
  .nav-link.is-active{background:rgba(35,211,200,.08);}
  .nav-link.is-active::after{left:12px;right:auto;width:3px;height:calc(100% - 20px);top:10px;bottom:auto;border-radius:3px;}
  .mega-panel{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    display:none;grid-template-columns:1fr;gap:16px;padding:16px;margin-top:6px;
    background:rgba(255,255,255,.03);box-shadow:none;
  }
  .mega-wrap.open .mega-panel{display:grid;}
  .split{grid-template-columns:1fr;}
  .cap-grid{grid-template-columns:1fr;gap:0;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .cta-inner{grid-template-columns:1fr;gap:34px;}
  .cta-panel{padding:40px 32px;}
  .cta-panel::before{left:32px;}
}
@media (max-width:768px){
  .section{padding:60px 0;}
  .section-tight{padding:48px 0;}
  .hero{padding:60px 0 56px;}
  .metric-band{grid-template-columns:1fr;}
  .metric-cell + .metric-cell{border-left:0;border-top:1px solid var(--line);}
  .metric-cell{padding:30px 4px;}
  .metric-cell::before{left:4px;}
  .scene-grid{grid-template-columns:1fr;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .form-row{grid-template-columns:1fr;}
  .hero-actions .btn{flex:1 1 auto;}
}
@media (max-width:560px){
  .container{padding:0 18px;}
  body{font-size:15px;line-height:1.85;}
  .hero h1{font-size:30px;}
  .hero-sub{font-size:15.5px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .fact-chip{width:100%;justify-content:flex-start;}
  .cta-panel{padding:30px 20px;border-radius:18px;}
  .cta-panel::before{left:20px;}
  .form{padding:22px 18px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .metric-value{font-size:34px;}
}

/* roulang page: article */
:root{
  --bg:#070B14;
  --bg-soft:#0A0F1B;
  --panel:#0E1524;
  --panel-2:rgba(255,255,255,.04);
  --primary:#23D3C8;
  --primary-deep:#12A79E;
  --primary-soft:rgba(35,211,200,.12);
  --accent:#FFB05C;
  --accent-soft:rgba(255,176,92,.12);
  --text:#E7EEF9;
  --text-2:#98A8C0;
  --text-3:#6C7C93;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --shadow-soft:0 4px 18px rgba(0,0,0,.28);
  --container:1240px;
  --font:system-ui,-apple-system,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --ease:300ms cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:
    radial-gradient(900px 520px at 10% -12%,rgba(35,211,200,.10),transparent 62%),
    radial-gradient(760px 480px at 96% 4%,rgba(255,176,92,.06),transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease),opacity var(--ease)}
a:hover{color:var(--primary)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(35,211,200,.28);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,11,20,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.94);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px rgba(0,0,0,.42);
}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font-weight:700;font-size:19px;color:#04211F;
  background:linear-gradient(140deg,#3FF0E2,#12A79E);
  box-shadow:0 0 0 1px rgba(35,211,200,.35),0 6px 18px rgba(18,167,158,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;letter-spacing:.4px}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.6px}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--primary);opacity:0;transform:scaleX(.4);transition:opacity var(--ease),transform var(--ease);
  box-shadow:0 0 12px rgba(35,211,200,.65);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{opacity:1;transform:scaleX(1)}
.nav-more{position:relative;flex:0 0 auto}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border-radius:var(--radius-pill);cursor:pointer;font-size:14px;font-weight:600;
  color:var(--text);background:rgba(35,211,200,.10);
  border:1px solid rgba(35,211,200,.28);
  transition:background var(--ease),box-shadow var(--ease),transform var(--ease);
}
.mega-trigger::after{content:"";width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-1px);transition:transform var(--ease)}
.mega-trigger:hover{background:rgba(35,211,200,.18);box-shadow:0 0 0 1px rgba(35,211,200,.35),0 0 22px rgba(35,211,200,.2);transform:translateY(-1px)}
.nav-more.is-open .mega-trigger::after{transform:rotate(-135deg) translateY(-1px)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:720px;padding:22px;
  display:grid;grid-template-columns:1.1fr 1.1fr 1fr;gap:18px;
  background:rgba(14,21,36,.82);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--line-strong);border-radius:18px;
  box-shadow:0 24px 60px rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transform:translateY(10px);pointer-events:none;
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.mega-panel::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,211,200,.75),transparent);
}
.nav-more:hover .mega-panel,.nav-more:focus-within .mega-panel,.nav-more.is-open .mega-panel{
  opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;
}
.mega-col h5{margin:0 0 12px;font-size:13px;letter-spacing:1px;color:var(--text-3);font-weight:600}
.mega-item{
  display:block;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;transition:background var(--ease),color var(--ease),border-color var(--ease),padding-left var(--ease);
}
.mega-item:hover{background:rgba(255,255,255,.06);color:var(--text);border-left-color:var(--primary);padding-left:16px}
.mega-item span{display:block;font-size:12px;color:var(--text-3);margin-top:2px}
.mega-card{
  display:block;padding:16px;border-radius:14px;background:var(--panel-2);
  border:1px solid var(--line);transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.mega-card:hover{border-color:rgba(35,211,200,.5);transform:translateY(-2px);background:rgba(35,211,200,.06)}
.mega-card strong{display:block;font-size:15px;margin-bottom:4px}
.mega-card em{font-style:normal;font-size:12.5px;color:var(--text-3)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;background:transparent;
  border:1px solid var(--line-strong);cursor:pointer;padding:0;place-items:center;gap:5px;flex-direction:column;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--ease),opacity var(--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)}

/* ---------- Article head ---------- */
.article-head{
  position:relative;padding:64px 0 0;overflow:hidden;
  background:
    linear-gradient(120deg,rgba(7,11,20,.94) 0%,rgba(7,11,20,.7) 46%,rgba(10,22,32,.82) 100%),
    url("/assets/images/backpic/back-1.png") center/cover no-repeat;
}
.article-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
}
.article-head-inner{position:relative;max-width:900px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 14px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.5px;color:var(--primary);
  background:var(--primary-soft);border:1px solid rgba(35,211,200,.28);
}
.article-head h1{
  margin:20px 0 18px;font-size:clamp(28px,4vw,44px);line-height:1.34;font-weight:600;letter-spacing:.2px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13.5px;color:var(--text-3)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.7}
.article-banner{
  position:relative;margin-top:40px;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.article-banner img{width:100%;aspect-ratio:21/9;object-fit:cover}
.article-banner figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:26px 22px 14px;font-size:13px;color:var(--text-2);
  background:linear-gradient(180deg,transparent,rgba(7,11,20,.88));
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:10px;padding-top:24px;padding-bottom:4px;
  font-size:13.5px;color:var(--text-3);min-width:0;
}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--text-3);opacity:.6}
.breadcrumb .current{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-2)}
.breadcrumb .crumb-cat{white-space:nowrap}

/* ---------- Layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;
  padding-top:48px;padding-bottom:8px;align-items:start;
}
.panel{
  position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-soft);
}
.article-main{padding:40px 44px;overflow:hidden}
.article-main::before{
  content:"";position:absolute;left:0;top:32px;bottom:32px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,rgba(35,211,200,.9),rgba(35,211,200,.05));
}
.post-body{max-width:72ch;font-size:16.5px;line-height:1.9;color:#DCE6F4}
.post-body > * + *{margin-top:22px}
.post-body p{color:#D6E1F0}
.post-body h2{
  margin-top:44px;margin-bottom:6px;font-size:clamp(22px,2.4vw,28px);font-weight:600;
  line-height:1.45;color:var(--text);padding-left:16px;position:relative;
}
.post-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:4px;height:1em;border-radius:3px;
  background:var(--primary);box-shadow:0 0 14px rgba(35,211,200,.65);
}
.post-body h3{margin-top:32px;margin-bottom:4px;font-size:20px;font-weight:600;line-height:1.5;color:var(--text)}
.post-body ul,.post-body ol{padding-left:24px;color:#D6E1F0}
.post-body li{margin:8px 0}
.post-body li::marker{color:var(--primary)}
.post-body a{color:var(--primary);border-bottom:1px solid rgba(35,211,200,.35)}
.post-body a:hover{color:#5FF0E5;border-bottom-color:#5FF0E5}
.post-body strong{color:#fff}
.post-body img{border-radius:var(--radius-sm);margin:26px auto;border:1px solid var(--line)}
.post-body blockquote{
  margin:28px 0;padding:18px 22px;border-left:3px solid var(--primary);
  background:rgba(35,211,200,.06);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-2);
}
.post-body blockquote p{margin:0;color:var(--text-2)}
.post-body table{width:100%;border-collapse:collapse;font-size:14.5px;margin:26px 0;display:block;overflow-x:auto}
.post-body th,.post-body td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.post-body th{background:rgba(255,255,255,.04);color:var(--text);font-weight:600}
.post-body td{color:var(--text-2)}
.post-body pre{
  margin:26px 0;padding:18px 20px;border-radius:var(--radius-sm);overflow-x:auto;
  background:#0B1220;border:1px solid var(--line);font-family:var(--mono);font-size:13.5px;line-height:1.7;color:#B9E9E4;
}
.post-body code{
  font-family:var(--mono);font-size:13.5px;padding:2px 7px;border-radius:6px;
  background:rgba(35,211,200,.10);color:#7CF0E6;
}
.post-body pre code{background:none;padding:0;color:inherit}
.empty-state{padding:56px 8px;text-align:center}
.empty-state h2{font-size:24px;font-weight:600;margin-bottom:12px}
.empty-state p{color:var(--text-2);margin-bottom:24px}

/* ---------- Aside ---------- */
.article-aside{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.side-card{padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
.side-card h3{font-size:15px;font-weight:600;letter-spacing:.4px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px rgba(35,211,200,.8)}
.toc{display:flex;flex-direction:column;gap:2px;max-height:300px;overflow:auto}
.toc a{
  display:block;padding:7px 10px;border-radius:8px;font-size:13.5px;color:var(--text-2);
  border-left:2px solid transparent;line-height:1.6;
}
.toc a.is-sub{padding-left:22px;font-size:13px;color:var(--text-3)}
.toc a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.toc a.is-current{color:var(--primary);border-left-color:var(--primary);background:rgba(35,211,200,.07)}
.toc-empty{font-size:13.5px;color:var(--text-3);line-height:1.7}
.side-links{display:flex;flex-direction:column;gap:10px}
.side-link{
  display:block;padding:12px 14px;border-radius:12px;background:var(--panel-2);border:1px solid var(--line);
  font-size:14px;color:var(--text-2);transition:border-color var(--ease),transform var(--ease),color var(--ease);
}
.side-link:hover{border-color:rgba(35,211,200,.5);color:var(--text);transform:translateY(-2px)}
.side-link em{display:block;font-style:normal;font-size:12.5px;color:var(--text-3);margin-top:3px}
.side-facts{list-style:none;font-size:13.5px;color:var(--text-2)}
.side-facts li{padding:9px 0;border-bottom:1px dashed var(--line);display:flex;justify-content:space-between;gap:12px}
.side-facts li:last-child{border-bottom:none}
.side-facts b{color:var(--text);font-family:var(--mono);font-weight:600}

/* ---------- Sections ---------- */
.section{padding:88px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.eyebrow{display:inline-block;font-size:12.5px;letter-spacing:2px;color:var(--primary);margin-bottom:10px;font-weight:600}
.section-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:600;line-height:1.4}
.section-head p{color:var(--text-2);font-size:15px;margin-top:8px;max-width:62ch}
.link-more{font-size:14px;color:var(--text-2);border-bottom:1px solid var(--line-strong);padding-bottom:3px}
.link-more:hover{color:var(--primary);border-bottom-color:var(--primary)}

/* ---------- Related cards ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(35,211,200,.5);box-shadow:0 0 0 1px rgba(35,211,200,.25),0 16px 36px rgba(0,0,0,.5)}
.post-card figure{position:relative;overflow:hidden;margin:0}
.post-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 600ms cubic-bezier(.22,.61,.36,1)}
.post-card:hover img{transform:scale(1.04)}
.post-card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card-body h3{font-size:17.5px;font-weight:600;line-height:1.5}
.post-card-body p{font-size:14px;color:var(--text-2);line-height:1.75}
.post-card-foot{margin-top:auto;display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--text-3)}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 11px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:600;color:var(--primary);background:var(--primary-soft);border:1px solid rgba(35,211,200,.22);
}
.arrow{color:var(--primary);font-family:var(--mono)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;margin-top:88px;padding:44px 42px;border-radius:20px;overflow:hidden;
  background:rgba(14,21,36,.72);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--line-strong);box-shadow:var(--shadow);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,211,200,.8),transparent);
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);font-weight:600;line-height:1.45;margin-bottom:10px}
.cta-band p{font-size:14.5px;color:var(--text-2);max-width:60ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#241403}
.btn-primary:hover{color:#241403;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,92,.45),0 0 24px rgba(255,176,92,.28)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(35,211,200,.35),0 0 24px rgba(35,211,200,.2)}
.btn-ghost:active{transform:translateY(1px);box-shadow:none}
.btn[disabled]{opacity:.6;filter:saturate(.55);cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- Form ---------- */
.contact-panel{padding:38px 40px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 24px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:13.5px;color:var(--text-2);font-weight:600}
.field input,.field select,.field textarea{
  height:48px;padding:0 14px;border-radius:var(--radius-sm);
  background:#0A1220;border:1px solid var(--line);color:var(--text);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field textarea{height:auto;min-height:118px;padding:12px 14px;line-height:1.7;resize:vertical}
.field select{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}
.field input::placeholder,.field textarea::placeholder{color:#5A6880}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:#0C1526;
  box-shadow:0 0 0 3px rgba(35,211,200,.16);
}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--text-2);line-height:1.7}
.check input{width:18px;height:18px;flex:0 0 auto;margin-top:3px;accent-color:var(--primary)}
.form-foot{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:26px}
.form-note{font-size:12.5px;color:var(--text-3);max-width:52ch}
.form-status{
  margin-top:18px;padding:0;font-size:14px;border-radius:10px;display:none;
}
.form-status.is-ok{display:block;padding:12px 16px;color:#062E2A;background:var(--primary);font-weight:600}
.form-status.is-err{display:block;padding:12px 16px;color:#2B1600;background:var(--accent);font-weight:600}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:96px;position:relative;
  background:linear-gradient(180deg,rgba(10,15,27,.6),rgba(7,11,20,.98));
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,211,200,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 40px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand p{font-size:13.5px;color:var(--text-3);line-height:1.85;max-width:40ch}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.5px}
.footer-col a{display:block;font-size:13.8px;color:var(--text-2);padding:5px 0}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-col ul{list-style:none;font-size:13.5px;color:var(--text-3)}
.footer-col ul li{padding:5px 0;line-height:1.7}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- Responsive ---------- */
@media (max-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:32px}
  .article-main{padding:34px 32px}
}
@media (max-width:992px){
  .header-inner{min-height:68px;gap:16px}
  .main-nav{
    position:fixed;top:68px;left:0;right:0;bottom:auto;z-index:90;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    padding:18px 20px 24px;background:rgba(8,13,23,.98);
    border-bottom:1px solid var(--line);box-shadow:0 24px 50px rgba(0,0,0,.6);
    transform:translateY(-12px);opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}
  .nav-link{padding:13px 14px;font-size:15.5px}
  .nav-link::after{display:none}
  .nav-link.is-active{background:rgba(35,211,200,.10);border-left:3px solid var(--primary)}
  .nav-toggle{display:flex;order:3;margin-left:12px}
  .nav-more{margin-left:auto;order:2}
  .mega-panel{
    width:min(92vw,560px);grid-template-columns:1fr;right:-56px;max-height:60vh;overflow:auto;
  }
  .nav-more:hover .mega-panel{opacity:0;visibility:hidden;transform:translateY(10px);pointer-events:none}
  .nav-more.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .article-aside{position:static;flex-direction:column}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .section{padding-top:64px}
  .cta-band{margin-top:64px;padding:32px 26px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .article-head{padding-top:44px}
  .article-main{padding:28px 22px}
  .article-main::before{display:none}
  .post-body h2{margin-top:36px}
  .contact-panel{padding:26px 22px}
  .form-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);padding-top:48px}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}
@media (max-width:560px){
  body{font-size:15px;line-height:1.85}
  .brand-text em{display:none}
  .article-head h1{margin:16px 0 14px}
  .post-body{font-size:15.5px}
  .article-banner img{aspect-ratio:16/9}
  .btn{width:100%}
  .cta-actions{flex-direction:column}
  .mega-panel{right:-16px;width:94vw}
  .section{padding-top:56px}
  .section-head h2{margin-top:6px}
}

/* roulang page: category2 */
:root{
  --bg:#070B14;
  --panel:#0E1524;
  --panel-2:#111A2B;
  --glass:rgba(255,255,255,.04);
  --primary:#23D3C8;
  --primary-dark:#12A79E;
  --primary-soft:rgba(35,211,200,.12);
  --accent:#FFB05C;
  --accent-soft:rgba(255,176,92,.14);
  --text:#E7EEF9;
  --text-2:#98A8C0;
  --text-3:#6C7C93;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius-card:16px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --shadow-soft:0 4px 18px rgba(0,0,0,.35);
  --container:1240px;
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
::selection{background:rgba(35,211,200,.28)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .3s ease,box-shadow .3s ease,background-color .3s ease,border-color .3s ease,color .3s ease;
}
.btn-primary{background:var(--accent);color:#20160A;box-shadow:0 6px 20px rgba(255,176,92,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,92,.45),0 0 26px rgba(255,176,92,.30)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,176,92,.30),0 0 12px rgba(255,176,92,.18)}
.btn-ghost{border-color:var(--line-strong);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(35,211,200,.55);box-shadow:0 0 0 1px rgba(35,211,200,.35),0 0 24px rgba(35,211,200,.22)}
.btn-ghost:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(35,211,200,.25)}
.btn-teal{background:var(--primary);color:#04211F;box-shadow:0 6px 20px rgba(35,211,200,.20)}
.btn-teal:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(35,211,200,.5),0 0 26px rgba(35,211,200,.28)}
.btn-teal:active{transform:translateY(1px)}
.btn-block{width:100%}
.btn:disabled,.btn[disabled]{cursor:not-allowed;filter:saturate(.4);opacity:.65;transform:none;box-shadow:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--radius-pill);
  background:var(--primary-soft);color:var(--primary);
  font-size:12px;font-weight:600;letter-spacing:.04em;
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}
.badge-muted{background:rgba(255,255,255,.06);color:var(--text-2)}

/* ---------- 页头导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(14px);
  transition:background-color .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header.is-scrolled{background:rgba(7,11,20,.94);border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(0,0,0,.4)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px}
.brand{display:inline-flex;align-items:center;gap:12px}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--primary),var(--primary-dark));
  color:#04211F;font-weight:700;font-size:19px;
  box-shadow:0 0 0 1px rgba(35,211,200,.35),0 0 22px rgba(35,211,200,.18);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;font-weight:600;letter-spacing:.02em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:color .25s ease,background-color .25s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(35,211,200,.7);
}
.header-actions{display:flex;align-items:center;gap:12px}
.mega-wrap{position:relative}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;border-radius:10px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  color:var(--text-2);font-size:14px;cursor:pointer;
  transition:color .25s ease,border-color .25s ease,background-color .25s ease;
}
.mega-trigger:hover,.mega-wrap.is-open .mega-trigger{color:var(--text);border-color:rgba(35,211,200,.45);background:rgba(35,211,200,.08)}
.mega-caret{width:8px;height:8px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .25s ease}
.mega-wrap.is-open .mega-caret{transform:rotate(225deg) translateY(-2px)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:640px;
  padding:24px;border-radius:18px;
  background:rgba(14,21,36,.86);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  backdrop-filter:blur(18px);
  display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
  z-index:70;
}
.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h5{margin:0 0 12px;font-size:12px;letter-spacing:.14em;color:var(--text-3);font-weight:600}
.mega-link{
  display:block;padding:9px 12px;border-radius:10px;font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease;
}
.mega-link:hover{background:rgba(255,255,255,.05);color:var(--text);border-left-color:var(--primary)}
.mega-card{
  display:block;padding:14px;border-radius:14px;margin-bottom:10px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.mega-card:hover{border-color:rgba(35,211,200,.5);transform:translateY(-2px)}
.mega-card strong{display:block;font-size:14px;margin-bottom:4px}
.mega-card span{font-size:12px;color:var(--text-3)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:12px;width:20px;height:2px;border-radius:2px;background:var(--text);
  transition:transform .3s ease,opacity .3s ease;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{content:"";left:0;top:-7px}
.nav-toggle span::after{content:"";left:0;top:7px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-7px) rotate(-45deg)}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:74px 0 0 0;z-index:55;
  background:rgba(7,11,20,.98);
  border-top:1px solid var(--line);
  padding:24px;overflow-y:auto;
  transform:translateY(-12px);opacity:0;visibility:hidden;
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-title{font-size:12px;letter-spacing:.14em;color:var(--text-3);margin:18px 0 10px}
.drawer-link{
  display:block;padding:14px 16px;border-radius:12px;font-size:16px;color:var(--text-2);
  border-left:2px solid transparent;background:rgba(255,255,255,.03);margin-bottom:8px;
}
.drawer-link.is-active{color:var(--text);border-left-color:var(--primary);background:rgba(35,211,200,.08)}

/* ---------- 页面首屏 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:96px 0 76px;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,11,20,.96) 0%,rgba(7,11,20,.78) 52%,rgba(7,11,20,.92) 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(231,238,249,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(231,238,249,.6) 1px,transparent 1px);
  background-size:64px 64px;
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumbs a{color:var(--text-2);transition:color .2s ease}
.crumbs a:hover{color:var(--primary)}
.crumbs span.sep{color:rgba(255,255,255,.2)}
.hero-brandline{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.hero-brandline .dot{width:8px;height:8px;border-radius:50%;background:var(--primary);box-shadow:0 0 12px rgba(35,211,200,.9)}
.hero-brandline b{font-size:13px;letter-spacing:.14em;font-weight:600;color:var(--text-2)}
.page-hero h1{
  font-size:clamp(34px,4.6vw,54px);
  line-height:1.22;font-weight:600;letter-spacing:.01em;
  max-width:840px;
}
.page-hero h1 .hl{color:var(--primary)}
.hero-sub{
  margin-top:20px;max-width:660px;
  font-size:17px;line-height:1.85;color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  font-size:13px;color:var(--text-2);
}
.chip i{width:6px;height:6px;border-radius:50%;background:var(--primary);font-style:normal}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head .badge{margin-bottom:16px}
.section-head h2{font-size:clamp(26px,3vw,34px);line-height:1.35;font-weight:600}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px}

/* ---------- 概览三卡 ---------- */
.intro-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.panel{
  position:relative;padding:28px 26px;border-radius:var(--radius-card);
  background:var(--panel);border:1px solid var(--line);
  overflow:hidden;
  transition:border-color .28s ease,transform .28s ease,box-shadow .28s ease;
}
.panel::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:0 3px 3px 0;
  background:var(--primary);opacity:.85;
}
.panel:hover{border-color:rgba(35,211,200,.42);transform:translateY(-3px);box-shadow:var(--shadow-soft)}
.panel h3{font-size:19px;font-weight:600;margin-bottom:10px}
.panel p{font-size:14.5px;color:var(--text-2)}
.panel-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);margin-bottom:18px;
}

/* ---------- 数据条带 ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat-cell{padding:32px 26px;border-right:1px solid var(--line)}
.stat-cell:last-child{border-right:none}
.stat-num{
  font-family:var(--mono);font-size:clamp(32px,3.6vw,44px);line-height:1.1;font-weight:600;
  letter-spacing:-.01em;
}
.stat-num sup{font-size:15px;color:var(--text-2);margin-left:4px;top:-1.1em;position:relative}
.stat-num.is-up{color:var(--accent)}
.stat-label{margin-top:12px;font-size:15px;font-weight:600}
.stat-note{margin-top:6px;font-size:12.5px;color:var(--text-3)}
.stat-band-wrap{position:relative}
.stat-band-wrap::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,rgba(35,211,200,0),rgba(35,211,200,.7),rgba(35,211,200,0));
}

/* ---------- 时间线 ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.tl-step{position:relative;padding-top:70px}
.tl-dot{
  position:absolute;top:0;left:0;width:48px;height:48px;border-radius:14px;
  display:grid;place-items:center;
  font-family:var(--mono);font-size:17px;font-weight:600;color:var(--primary);
  background:var(--panel);border:1px solid rgba(35,211,200,.35);
  box-shadow:0 0 0 1px rgba(35,211,200,.08),0 0 20px rgba(35,211,200,.12);
}
.tl-step::before{
  content:"";position:absolute;top:24px;left:52px;right:-24px;height:1px;
  background:linear-gradient(90deg,rgba(35,211,200,.6),rgba(35,211,200,.06));
}
.timeline .tl-step:last-child::before{display:none}
.tl-step h3{font-size:18px;font-weight:600;margin-bottom:10px}
.tl-step p{font-size:14.5px;color:var(--text-2)}
.tl-meta{margin-top:14px;font-size:13px;color:var(--text-3);font-family:var(--mono)}

/* ---------- 对比条 ---------- */
.compare{border-top:1px solid var(--line)}
.compare-head{
  display:grid;grid-template-columns:180px 1fr 1fr 104px;gap:18px;
  padding:18px 0;font-size:13px;color:var(--text-3);letter-spacing:.06em;
  border-bottom:1px solid var(--line);
}
.compare-row{
  display:grid;grid-template-columns:180px 1fr 1fr 104px;gap:18px;align-items:center;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.compare-row:hover{background:rgba(255,255,255,.015)}
.cr-label{font-size:15px;font-weight:600}
.cr-cell{display:flex;align-items:center;gap:12px}
.cr-track{flex:1;height:10px;border-radius:var(--radius-pill);background:rgba(255,255,255,.05);overflow:hidden}
.cr-fill{height:100%;border-radius:var(--radius-pill);transition:width .6s ease}
.cr-fill.before{background:linear-gradient(90deg,rgba(152,168,192,.5),rgba(152,168,192,.28))}
.cr-fill.after{background:linear-gradient(90deg,var(--primary-dark),var(--primary));box-shadow:0 0 14px rgba(35,211,200,.35)}
.cr-text{font-size:13.5px;color:var(--text-2);white-space:nowrap}
.compare-row.is-after .cr-label{color:var(--text)}
.cr-delta{font-family:var(--mono);font-size:14px;color:var(--accent);text-align:right}
.legend{display:flex;gap:22px;margin-top:22px;font-size:13px;color:var(--text-3)}
.legend span{display:inline-flex;align-items:center;gap:8px}
.legend b{width:22px;height:8px;border-radius:4px;display:inline-block}
.legend .lb-grey{background:rgba(152,168,192,.4)}
.legend .lb-teal{background:linear-gradient(90deg,var(--primary-dark),var(--primary))}

/* ---------- 图文区 ---------- */
.feature-split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.feature-media{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/11;background:var(--panel);
}
.feature-media img{width:100%;height:100%;object-fit:cover}
.feature-list{display:grid;gap:18px;margin-top:26px}
.feature-item{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start}
.fi-mark{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);font-size:13px;font-weight:700;font-family:var(--mono);
}
.feature-item h4{font-size:16px;font-weight:600;margin-bottom:4px}
.feature-item p{font-size:14px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;background:none;border:none;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:600;color:var(--text);
  transition:color .22s ease;
}
.faq-q:hover{color:var(--primary)}
.faq-icon{
  position:relative;flex:0 0 22px;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--line-strong);
  transition:transform .3s ease,border-color .3s ease,background-color .3s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--text-2);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.6px}
.faq-icon::after{width:1.6px;height:10px;transition:opacity .25s ease}
.faq-item.is-open .faq-icon{transform:rotate(90deg);border-color:rgba(35,211,200,.6);background:var(--primary-soft)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 4px 24px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:820px}

/* ---------- 表单 ---------- */
.form-wrap{
  display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:start;
}
.form-panel{
  padding:34px;border-radius:20px;
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-soft);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:13.5px;color:var(--text-2);font-weight:600}
.field input,.field select,.field textarea{
  height:48px;padding:0 14px;border-radius:12px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  color:var(--text);font-size:15px;
  transition:border-color .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.field textarea{height:120px;padding:12px 14px;resize:vertical;line-height:1.7}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-2) 50%),linear-gradient(135deg,var(--text-2) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(35,211,200,.7);
  box-shadow:0 0 0 3px rgba(35,211,200,.14);
  background:rgba(35,211,200,.04);
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--text-2)}
.check input{width:18px;height:18px;height:18px;accent-color:var(--primary);margin-top:4px}
.form-hint{margin-top:14px;font-size:12.5px;color:var(--text-3)}
.form-status{
  display:none;margin-top:16px;padding:12px 16px;border-radius:12px;font-size:14px;
  border:1px solid transparent;
}
.form-status.is-ok{display:block;background:rgba(35,211,200,.10);border-color:rgba(35,211,200,.4);color:var(--primary)}
.form-status.is-error{display:block;background:rgba(255,176,92,.10);border-color:rgba(255,176,92,.45);color:var(--accent)}
.form-side h3{font-size:clamp(24px,2.6vw,30px);line-height:1.4;font-weight:600;margin-bottom:16px}
.form-side p{color:var(--text-2);font-size:15.5px}
.side-list{margin-top:26px;display:grid;gap:16px}
.side-list li{display:grid;grid-template-columns:auto 1fr;gap:12px;font-size:14.5px;color:var(--text-2)}
.side-list b{color:var(--primary);font-family:var(--mono);font-size:14px}

/* ---------- 骨架 / 空态（备用状态样式） ---------- */
.skeleton{background:linear-gradient(90deg,rgba(255,255,255,.05),rgba(255,255,255,.12),rgba(255,255,255,.05));background-size:200% 100%;animation:sk 1.4s ease infinite;border-radius:10px}
@keyframes sk{0%{background-position:200% 0}100%{background-position:-200% 0}}
.empty-state{padding:56px 24px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--radius-card);color:var(--text-2)}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;margin-top:20px;padding:72px 0 32px;background:#050910;border-top:1px solid var(--line)}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(35,211,200,0),rgba(35,211,200,.65),rgba(35,211,200,0));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--text-2);max-width:380px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:18px;color:var(--text)}
.footer-col a{display:block;padding:7px 0;font-size:14px;color:var(--text-2);transition:color .22s ease,transform .22s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(3px)}
.footer-col ul li{font-size:14px;color:var(--text-2);padding:6px 0}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .mega-panel{width:560px;grid-template-columns:1fr 1fr;grid-auto-rows:auto}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .compare-head,.compare-row{grid-template-columns:150px 1fr 1fr 88px;gap:14px}
}
@media (max-width:992px){
  .main-nav{display:none}
  .mega-wrap{display:none}
  .nav-toggle{display:block}
  .section{padding:64px 0}
  .intro-grid{grid-template-columns:1fr 1fr}
  .stat-band{grid-template-columns:1fr 1fr}
  .stat-cell:nth-child(2){border-right:none}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line)}
  .timeline{grid-template-columns:1fr 1fr;gap:32px}
  .timeline .tl-step:nth-child(2)::before{display:none}
  .feature-split{grid-template-columns:1fr;gap:36px}
  .form-wrap{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .page-hero{padding:70px 0 56px}
  .hero-sub{font-size:16px}
  .compare-head{display:none}
  .compare-row{
    grid-template-columns:1fr;gap:12px;padding:22px 0;
  }
  .cr-delta{text-align:left}
  .cr-text{white-space:normal}
  .intro-grid{grid-template-columns:1fr}
  .stat-band{grid-template-columns:1fr}
  .stat-cell{border-right:none;border-bottom:1px solid var(--line)}
  .stat-cell:last-child{border-bottom:none}
  .timeline{grid-template-columns:1fr;gap:8px}
  .tl-step{padding:0 0 30px 68px}
  .tl-dot{top:2px}
  .tl-step::before{
    top:56px;left:23px;right:auto;bottom:-4px;width:1px;height:auto;
    background:linear-gradient(180deg,rgba(35,211,200,.55),rgba(35,211,200,.06));
  }
  .timeline .tl-step:nth-child(2)::before{display:block}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:560px){
  .container{padding:0 20px}
  body{font-size:15px;line-height:1.85}
  .header-inner{height:66px}
  .mobile-drawer{inset:66px 0 0 0}
  .brand-text em{display:none}
  .hero-actions .btn{width:100%}
  .form-grid{grid-template-columns:1fr}
  .form-panel{padding:24px}
  .section{padding:52px 0}
  .page-hero h1{font-size:30px}
}

/* roulang page: category3 */
:root{
  --bg:#070B14;
  --panel:#0E1524;
  --panel-2:#111A2C;
  --panel-3:#162034;
  --elevate:rgba(255,255,255,.04);
  --primary:#23D3C8;
  --primary-deep:#12A79E;
  --primary-soft:rgba(35,211,200,.12);
  --accent:#FFB05C;
  --accent-soft:rgba(255,176,92,.14);
  --text:#E7EEF9;
  --text-2:#98A8C0;
  --text-3:#6C7C93;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius-card:16px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --shadow-soft:0 4px 18px rgba(0,0,0,.28);
  --glow:0 0 0 1px rgba(35,211,200,.35),0 0 24px rgba(35,211,200,.22);
  --container:1240px;
  --section:96px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}

*,*::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:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;letter-spacing:.005em;}
p{margin:0;}
::selection{background:rgba(35,211,200,.3);color:#fff;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(7,11,20,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background-color .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header.is-scrolled{
  background:rgba(7,11,20,.94);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  min-height:76px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(140deg,var(--primary),#0E7C82);
  color:#04121A;
  font-weight:700;
  font-size:19px;
  box-shadow:0 0 0 1px rgba(35,211,200,.35),0 0 20px rgba(35,211,200,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;font-weight:600;letter-spacing:.02em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.06em;}

.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;flex:1;}
.nav-link{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:10px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),rgba(35,211,200,0));
  opacity:0;
  transform:scaleX(.4);
  transform-origin:left;
  transition:opacity .3s ease,transform .3s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link:hover::after{opacity:.7;transform:scaleX(1);}
.nav-link.is-active{
  color:var(--text);
  background:var(--primary-soft);
}
.nav-link.is-active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 12px rgba(35,211,200,.6);}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.mega-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;
  font-size:14px;
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  transition:color .25s ease,border-color .25s ease,background-color .25s ease;
}
.mega-toggle:hover{color:var(--text);border-color:var(--line-strong);background:rgba(255,255,255,.04);}
.mega-toggle .chev{width:8px;height:8px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .3s ease;}
.mega-toggle[aria-expanded="true"] .chev{transform:rotate(-135deg) translateY(-1px);}
.mega-toggle[aria-expanded="true"]{color:var(--text);border-color:rgba(35,211,200,.45);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:500;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:transform .3s ease,box-shadow .3s ease,background-color .3s ease,color .3s ease,border-color .3s ease;
  will-change:transform;
}
.btn-primary{
  background:linear-gradient(135deg,#FFC078,var(--accent));
  color:#241303;
  box-shadow:0 6px 20px rgba(255,176,92,.24);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,92,.45),0 0 26px rgba(255,176,92,.32);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 12px rgba(255,176,92,.2);}
.btn-ghost{
  color:var(--text);
  border-color:var(--line-strong);
  background:rgba(255,255,255,.03);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(35,211,200,.5);box-shadow:var(--glow);}
.btn-ghost:active{transform:translateY(1px);}
.btn-soft{
  background:var(--primary-soft);
  color:var(--primary);
  border-color:rgba(35,211,200,.3);
}
.btn-soft:hover{transform:translateY(-2px);box-shadow:var(--glow);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.55;filter:saturate(.6);cursor:not-allowed;transform:none;box-shadow:none;}

.nav-burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  position:relative;
}
.nav-burger span{
  position:absolute;left:12px;right:12px;height:2px;background:var(--text);border-radius:2px;
  transition:transform .3s ease,opacity .3s ease;
}
.nav-burger span:nth-child(1){top:15px;}
.nav-burger span:nth-child(2){top:21px;}
.nav-burger span:nth-child(3){top:27px;}
.nav-burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-burger.is-open span:nth-child(2){opacity:0;}
.nav-burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* Mega 面板 */
.mega-panel{
  position:absolute;
  left:0;right:0;
  top:100%;
  background:rgba(14,21,36,.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  box-shadow:0 24px 50px rgba(0,0,0,.5);
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease;
}
.mega-panel.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{
  display:grid;
  grid-template-columns:1.1fr 1.2fr 1.4fr;
  gap:32px;
  padding:32px 24px 36px;
  max-width:var(--container);
  margin:0 auto;
}
.mega-col h5{
  margin:0 0 14px;
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--text-3);
  font-weight:600;
}
.mega-col a.mega-item{
  display:block;
  padding:10px 12px;
  border-left:3px solid transparent;
  border-radius:8px;
  font-size:15px;
  color:var(--text-2);
  transition:color .25s ease,background-color .25s ease,border-color .25s ease,transform .25s ease;
}
.mega-col a.mega-item:hover{
  color:var(--text);
  background:rgba(255,255,255,.05);
  border-left-color:var(--primary);
  transform:translateX(3px);
}
.mega-item small{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px;}
.mega-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.mega-card{
  display:block;
  padding:16px;
  border:1px solid var(--line);
  border-radius:14px;
  background:rgba(255,255,255,.03);
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.mega-card:hover{border-color:rgba(35,211,200,.45);transform:translateY(-2px);box-shadow:var(--glow);}
.mega-card strong{display:block;font-size:15px;font-weight:600;}
.mega-card span{display:block;margin-top:4px;font-size:12.5px;color:var(--text-3);}

/* ---------- 通用区块 ---------- */
.section{padding:var(--section) 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid rgba(35,211,200,.22);
  border-radius:var(--radius-pill);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary);}
h2.section-title{font-size:clamp(26px,2.4vw,34px);}
.section-desc{margin-top:14px;color:var(--text-2);font-size:15.5px;max-width:720px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(90deg,rgba(7,11,20,.95) 0%,rgba(7,11,20,.82) 45%,rgba(7,11,20,.6) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.5;
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:56px;
  align-items:center;
  padding:96px 0 88px;
}
.hero-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.14em;color:var(--text-2);
  margin-bottom:20px;
}
.hero-brand b{color:var(--primary);font-weight:600;letter-spacing:.12em;}
.hero h1{
  font-size:clamp(32px,3.6vw,50px);
  line-height:1.22;
  font-weight:600;
  letter-spacing:.01em;
}
.hero h1 .hl{
  background:linear-gradient(120deg,var(--primary),#7FF0E4);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  margin-top:20px;
  max-width:560px;
  font-size:17px;
  color:var(--text-2);
  line-height:1.85;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 15px;
  font-size:13px;
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.03);
  font-family:var(--mono);
}
.chip b{color:var(--primary);font-weight:600;}

.hero-card{
  position:relative;
  padding:26px;
  border-radius:20px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(18,26,44,.55);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}
.hero-card::before{
  content:"";
  position:absolute;left:20px;right:20px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,211,200,.8),transparent);
}
.hero-card h3{font-size:15px;color:var(--text-2);font-weight:500;letter-spacing:.06em;}
.hero-card .metric-list{margin-top:18px;display:grid;gap:2px;}
.hero-card .metric-row{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:12px;padding:14px 0;
  border-top:1px solid var(--line);
}
.hero-card .metric-row:first-child{border-top:0;}
.hero-card .metric-row span{font-size:13.5px;color:var(--text-2);}
.hero-card .metric-row b{font-family:var(--mono);font-size:24px;font-weight:600;color:var(--text);letter-spacing:-.01em;}
.hero-card .metric-row b i{font-style:normal;font-size:13px;color:var(--text-3);margin-left:4px;}
.hero-card .metric-note{margin-top:14px;font-size:12px;color:var(--text-3);line-height:1.7;}

/* ---------- 数据条带 ---------- */
.stat-band{background:var(--panel);border-bottom:1px solid var(--line);}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  padding:44px 0;
}
.stat-item{
  padding:0 34px;
  border-left:1px solid var(--line);
}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-item .num{
  font-family:var(--mono);
  font-size:clamp(32px,3.2vw,44px);
  font-weight:600;
  letter-spacing:-.02em;
  line-height:1.1;
  display:flex;align-items:flex-start;gap:6px;
}
.stat-item .num sup{font-size:14px;color:var(--text-3);margin-top:6px;font-weight:500;}
.stat-item .num.is-up{color:var(--accent);}
.stat-item .label{margin-top:12px;font-size:15px;color:var(--text);}
.stat-item .note{margin-top:6px;font-size:12.5px;color:var(--text-3);}

/* ---------- 图集网格 ---------- */
.gallery-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.gallery-card{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--panel);
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.gallery-card:hover{border-color:rgba(35,211,200,.5);transform:translateY(-2px);box-shadow:var(--shadow);}
.gallery-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--panel-2);}
.gallery-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;}
.gallery-card:hover .thumb img{transform:scale(1.05);}
.gallery-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,0) 30%,rgba(7,11,20,.85) 100%);
}
.gallery-card .index{
  position:absolute;top:14px;left:14px;z-index:2;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;
  padding:4px 10px;border-radius:var(--radius-pill);
  background:rgba(7,11,20,.72);
  border:1px solid rgba(35,211,200,.35);
  color:var(--primary);
}
.gallery-card .body{padding:20px 22px 24px;}
.gallery-card h3{font-size:17.5px;}
.gallery-card p{margin-top:8px;font-size:14px;color:var(--text-2);}
.gallery-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 12px;
  font-size:12px;
  color:var(--primary);
  background:var(--primary-soft);
  border-radius:var(--radius-pill);
}
.tag.is-accent{color:var(--accent);background:var(--accent-soft);}

/* ---------- 长文分栏 ---------- */
.split{
  display:grid;
  grid-template-columns:minmax(0,1.9fr) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.article-body{max-width:72ch;}
.article-body h2{font-size:clamp(22px,2vw,28px);margin-top:44px;}
.article-body h2:first-child{margin-top:0;}
.article-body h3{font-size:20px;margin-top:30px;color:var(--text);}
.article-body p{margin-top:16px;color:var(--text-2);line-height:1.9;}
.article-body ul{margin-top:16px;display:grid;gap:10px;}
.article-body ul li{
  position:relative;
  padding-left:20px;
  color:var(--text-2);
  font-size:15.5px;
}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 10px rgba(35,211,200,.5);
}
.article-body blockquote{
  margin:28px 0;
  padding:20px 24px;
  border-left:3px solid var(--primary);
  border-radius:0 14px 14px 0;
  background:linear-gradient(90deg,rgba(35,211,200,.09),rgba(35,211,200,0));
  color:var(--text);
  font-size:15.5px;
  line-height:1.85;
}
.article-body blockquote cite{display:block;margin-top:10px;font-style:normal;font-size:13px;color:var(--text-3);}

.side-rail{position:sticky;top:104px;display:grid;gap:20px;}
.rail-card{
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--panel);
  box-shadow:var(--shadow-soft);
}
.rail-card h4{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.rail-card h4::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px rgba(35,211,200,.6);}
.rail-toc a{
  display:block;
  padding:8px 0;
  font-size:14px;
  color:var(--text-2);
  border-bottom:1px dashed var(--line);
}
.rail-toc a:last-child{border-bottom:0;}
.rail-toc a:hover{color:var(--primary);padding-left:6px;}
.rail-list li{
  display:flex;gap:10px;
  font-size:14px;color:var(--text-2);
  padding:8px 0;
}
.rail-list li b{font-family:var(--mono);color:var(--primary);font-weight:600;flex-shrink:0;}

/* ---------- 流程时间线 ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  position:relative;
}
.timeline::before{
  content:"";position:absolute;left:0;right:0;top:23px;height:1px;
  background:linear-gradient(90deg,rgba(35,211,200,.5),rgba(35,211,200,.1));
}
.step{
  position:relative;
  padding-top:0;
  background:var(--bg);
}
.step .dot{
  position:relative;z-index:2;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:14px;
  border:1px solid rgba(35,211,200,.4);
  background:var(--panel-2);
  color:var(--primary);
  font-family:var(--mono);
  font-size:15px;
  margin-bottom:20px;
  box-shadow:0 0 0 6px var(--bg);
}
.step h3{font-size:17px;}
.step p{margin-top:10px;font-size:14px;color:var(--text-2);}
.step .meta{margin-top:12px;font-size:12.5px;color:var(--text-3);font-family:var(--mono);}

/* ---------- 对比条 ---------- */
.compare-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.compare-col{
  padding:26px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--panel);
}
.compare-col.is-after{
  border-color:rgba(35,211,200,.35);
  background:linear-gradient(180deg,rgba(35,211,200,.07),rgba(14,21,36,1));
  box-shadow:var(--shadow);
}
.compare-col h3{font-size:16px;color:var(--text-2);font-weight:500;letter-spacing:.06em;margin-bottom:20px;}
.compare-col.is-after h3{color:var(--primary);}
.bar-row{margin-top:18px;}
.bar-row:first-of-type{margin-top:0;}
.bar-row .bar-label{display:flex;justify-content:space-between;font-size:14px;color:var(--text-2);margin-bottom:8px;}
.bar-row .bar-label b{font-family:var(--mono);color:var(--text);font-weight:600;}
.bar-track{height:8px;border-radius:6px;background:rgba(255,255,255,.06);overflow:hidden;}
.bar-fill{height:100%;border-radius:6px;background:rgba(152,168,192,.5);}
.compare-col.is-after .bar-fill{background:linear-gradient(90deg,var(--primary),#6DE8DE);}
.compare-foot{
  margin-top:26px;
  padding:18px 22px;
  border:1px solid rgba(255,176,92,.35);
  border-radius:14px;
  background:var(--accent-soft);
  font-size:14.5px;
  color:var(--text);
}
.compare-foot b{font-family:var(--mono);color:var(--accent);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;
  cursor:pointer;
  list-style:none;
  font-size:17px;
  font-weight:500;
  transition:color .25s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);}
.faq-item summary .plus{
  position:relative;flex-shrink:0;
  width:22px;height:22px;
  border:1px solid var(--line-strong);
  border-radius:50%;
  transition:transform .3s ease,border-color .3s ease,background-color .3s ease;
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--text-2);
  transform:translate(-50%,-50%);
}
.faq-item summary .plus::before{width:10px;height:1.6px;}
.faq-item summary .plus::after{width:1.6px;height:10px;transition:opacity .3s ease;}
.faq-item[open] summary .plus{transform:rotate(90deg);border-color:rgba(35,211,200,.6);background:var(--primary-soft);}
.faq-item[open] summary .plus::before,
.faq-item[open] summary .plus::after{background:var(--primary);}
.faq-item[open] summary .plus::after{opacity:0;}
.faq-answer{padding:0 4px 24px;font-size:15px;color:var(--text-2);line-height:1.85;max-width:820px;}

/* ---------- 联系卡片 + 表单 ---------- */
.contact-section{
  background:linear-gradient(180deg,rgba(14,21,36,0),rgba(14,21,36,.8));
  border-top:1px solid var(--line);
}
.contact-card{
  display:grid;
  grid-template-columns:1fr 1.1fr;
  gap:0;
  border:1px solid var(--line-strong);
  border-radius:22px;
  overflow:hidden;
  background:var(--panel);
  box-shadow:var(--shadow);
}
.contact-aside{
  padding:40px 38px;
  background:
    linear-gradient(160deg,rgba(35,211,200,.14),rgba(7,11,20,.2)),
    var(--panel-2);
  border-right:1px solid var(--line);
}
.contact-aside h2{font-size:clamp(22px,2.2vw,28px);}
.contact-aside p{margin-top:16px;color:var(--text-2);font-size:15px;}
.contact-points{margin-top:26px;display:grid;gap:14px;}
.contact-points li{display:flex;gap:12px;font-size:14.5px;color:var(--text-2);}
.contact-points li b{
  flex-shrink:0;width:22px;height:22px;border-radius:7px;
  display:grid;place-items:center;font-size:12px;
  background:var(--primary-soft);color:var(--primary);
  font-family:var(--mono);
}
.contact-aside .work-time{
  margin-top:30px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);line-height:1.9;
}
.form-panel{padding:40px 38px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13.5px;color:var(--text-2);letter-spacing:.03em;}
.field label .req{color:var(--accent);margin-left:4px;}
.field input,.field select,.field textarea{
  width:100%;
  height:48px;
  padding:0 14px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  font-size:14.5px;
  color:var(--text);
  transition:border-color .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.field textarea{height:118px;padding:14px;resize:vertical;line-height:1.7;}
.field select{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;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(35,211,200,.65);
  box-shadow:0 0 0 3px rgba(35,211,200,.14);
  background:rgba(255,255,255,.06);
}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--text-2);line-height:1.7;}
.check-row input{width:18px;height:18px;flex-shrink:0;margin-top:3px;accent-color:var(--primary);}
.check-row a{color:var(--primary);border-bottom:1px solid rgba(35,211,200,.4);}
.form-actions{margin-top:22px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-note{font-size:12.5px;color:var(--text-3);}
.status-bar{
  margin-top:18px;
  padding:12px 16px;
  border-radius:12px;
  font-size:14px;
  display:none;
}
.status-bar.is-ok{display:block;background:rgba(35,211,200,.12);border:1px solid rgba(35,211,200,.4);color:#8DF4EA;}
.status-bar.is-err{display:block;background:var(--accent-soft);border:1px solid rgba(255,176,92,.45);color:#FFD5A6;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:0;
  border-top:1px solid var(--line);
  background:var(--panel);
}
.site-footer::before{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,211,200,.7),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding:64px 0 44px;
}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--text-2);line-height:1.85;max-width:340px;}
.footer-col h4{font-size:14.5px;margin-bottom:18px;letter-spacing:.06em;}
.footer-col a,.footer-col li{
  display:block;
  font-size:14px;
  color:var(--text-2);
  padding:6px 0;
  line-height:1.7;
}
.footer-col a:hover{color:var(--primary);transform:translateX(3px);}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  padding:22px 0 34px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--primary);}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .hero-inner{gap:40px;}
  .split{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1/-1;}
}
@media (max-width:992px){
  :root{--section:72px;}
  .nav-burger{display:block;}
  .main-nav{
    position:absolute;
    left:0;right:0;top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    margin:0;
    padding:14px 24px 22px;
    background:rgba(9,14,25,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px rgba(0,0,0,.5);
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:10px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:var(--primary-soft);box-shadow:inset 3px 0 0 var(--primary);}
  .mega-toggle{display:none;}
  .mega-panel{display:none;}
  .hero-inner{grid-template-columns:1fr;padding:64px 0 60px;}
  .hero-card{max-width:560px;}
  .stat-grid{grid-template-columns:1fr;gap:0;}
  .stat-item{border-left:0;padding:22px 0;border-top:1px solid var(--line);}
  .stat-item:first-child{border-top:0;padding-top:0;}
  .gallery-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;}
  .side-rail{position:static;grid-template-columns:1fr 1fr;}
  .timeline{grid-template-columns:repeat(2,1fr);}
  .timeline::before{display:none;}
  .step .dot{box-shadow:none;}
  .compare-wrap{grid-template-columns:1fr;}
  .contact-card{grid-template-columns:1fr;}
  .contact-aside{border-right:0;border-bottom:1px solid var(--line);}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .header-inner{min-height:68px;gap:14px;}
  .brand-text em{display:none;}
  .header-actions .btn-primary{display:none;}
  .hero-chips{gap:8px;}
  .gallery-grid{grid-template-columns:1fr;}
  .side-rail{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;gap:0;}
  .step{padding:0 0 26px;border-left:1px solid var(--line);padding-left:22px;margin-left:22px;}
  .step .dot{margin-left:-45px;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:560px){
  body{font-size:15px;line-height:1.85;}
  .hero-inner{padding:48px 0 46px;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn{width:100%;}
  .form-panel,.contact-aside{padding:28px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-item summary{font-size:15.5px;padding:18px 2px;}
  .stat-item .num{font-size:34px;}
}