/* roulang page: index */
:root{
  --brand:#00A88F;
  --brand-dark:#007D6B;
  --brand-light:#E6F7F3;
  --accent:#FF6B35;
  --accent-dark:#E8571F;
  --ink:#0E1513;
  --graphite:#5B6661;
  --line:#E7EBE6;
  --warm:#F7F8F5;
  --white:#FFFFFF;
  --signal:#F5C542;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --sh-sm:0 4px 14px rgba(14,21,19,.05);
  --sh:0 10px 30px rgba(14,21,19,.06);
  --sh-lg:0 20px 50px rgba(14,21,19,.13);
  --container:1280px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC","Hiragino Sans GB",sans-serif;
  font-size:17px;line-height:1.8;color:var(--ink);background:var(--white);
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .28s ease,border-color .28s ease,background-color .28s ease}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.sec{padding:104px 0}
.sec-warm{background:var(--warm)}
.sec-ink{background:var(--ink);color:#fff}
.sec-head{max-width:780px;margin-bottom:56px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand-dark);
  background:var(--brand-light);border-radius:var(--r-pill);padding:7px 16px;margin-bottom:20px;
}
.sec-head h2{font-size:clamp(30px,3.3vw,44px);line-height:1.15;font-weight:800;letter-spacing:-.02em}
.sec-head p{margin-top:18px;color:var(--graphite);font-size:17px;line-height:1.85}
.sec-ink .sec-head h2{color:#fff}
.sec-ink .sec-head p{color:rgba(255,255,255,.72)}
h3{font-size:23px;line-height:1.35;font-weight:700;letter-spacing:-.01em}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 30px;border-radius:var(--r-pill);font-weight:700;font-size:16px;
  border:1px solid transparent;transition:transform .28s ease,box-shadow .28s ease,background-color .28s ease,border-color .28s ease,color .28s ease;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 22px rgba(0,168,143,.28)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,168,143,.34);color:#fff}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(255,107,53,.3)}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 14px 32px rgba(255,107,53,.36);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-light);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand-light);color:var(--brand-dark);transform:translateY(-2px)}
.btn-sm{padding:11px 22px;font-size:15px}
.btn:focus-visible,.nav-link:focus-visible,.faq-q:focus-visible,a:focus-visible{outline:3px solid rgba(0,168,143,.32);outline-offset:3px;border-radius:8px}
.text-link{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--brand-dark);font-size:15px}
.text-link i{transition:transform .28s ease}
.text-link:hover i{transform:translateX(4px)}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(247,248,245,.92);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease,background-color .3s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(14,21,19,.08);background:rgba(255,255,255,.96)}
.nav-inner{display:flex;align-items:center;gap:28px;height:78px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:19px;
  box-shadow:0 8px 18px rgba(0,168,143,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-text small{font-size:11.5px;color:var(--graphite);letter-spacing:.06em}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:9px 15px;border-radius:10px;font-size:15.5px;font-weight:600;color:var(--graphite);
  transition:color .25s ease,background-color .25s ease;
}
.nav-link::after{
  content:"";position:absolute;left:15px;right:15px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.nav-link:hover{color:var(--ink);background:rgba(0,168,143,.07)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-dark)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.mega-wrap{position:relative}
.mega-btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:10px;
  border:1px solid var(--line);background:#fff;font-size:15px;font-weight:600;color:var(--ink);
  transition:border-color .25s ease,color .25s ease,background-color .25s ease;
}
.mega-btn:hover,.mega-wrap.is-open .mega-btn{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-light)}
.mega-btn i{font-size:12px;transition:transform .3s ease}
.mega-wrap.is-open .mega-btn i{transform:rotate(180deg)}
.mega-panel{
  position:absolute;top:calc(100% + 16px);right:0;width:740px;background:#fff;
  border:1px solid var(--line);border-radius:20px;box-shadow:var(--sh-lg);padding:28px;
  display:grid;grid-template-columns:1.05fr 1fr;gap:30px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease;z-index:70;
}
.mega-wrap:hover .mega-panel,.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:12.5px;font-weight:800;letter-spacing:.14em;color:var(--brand-dark);margin-bottom:16px}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mega-cats a{
  display:block;padding:12px 14px;border-radius:12px;font-size:14.5px;font-weight:600;
  background:var(--warm);border:1px solid transparent;transition:.25s ease;
}
.mega-cats a:hover{background:var(--brand-light);border-color:rgba(0,168,143,.3);color:var(--brand-dark);transform:translateY(-2px)}
.mega-list li + li{margin-top:12px}
.mega-list a{display:block;padding:10px 0;border-bottom:1px dashed var(--line)}
.mega-list a:last-child{border-bottom:0}
.mega-list b{display:block;font-size:14.5px;font-weight:700;transition:color .25s ease}
.mega-list a:hover b{color:var(--brand-dark)}
.mega-list span{font-size:12.5px;color:var(--graphite)}
.mega-foot{
  grid-column:1 / -1;margin-top:-6px;padding:16px 20px;border-radius:14px;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.mega-foot p{font-size:14px;color:rgba(255,255,255,.78)}
.mega-foot strong{color:#fff;font-size:15px;display:block}
.mega-foot a{background:var(--brand);color:#fff;padding:9px 18px;border-radius:var(--r-pill);font-size:14px;font-weight:700}
.mega-foot a:hover{background:var(--brand-dark)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;font-size:17px}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;padding:18px 0 26px;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer .wrap{display:flex;flex-direction:column;gap:6px}
.mobile-drawer a.m-link{padding:13px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line)}
.mobile-drawer a.m-link.is-active{color:var(--brand-dark)}
.m-group{border-bottom:1px solid var(--line)}
.m-group summary{padding:13px 4px;font-size:16px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.m-group summary::-webkit-details-marker{display:none}
.m-group summary::after{content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--graphite);font-size:13px;transition:transform .25s ease}
.m-group[open] summary::after{transform:rotate(180deg)}
.m-group a{display:block;padding:11px 4px 11px 18px;font-size:15px;color:var(--graphite);border-top:1px dashed var(--line)}
.m-group a:hover{color:var(--brand-dark)}

/* ============ Hero ============ */
.hero{position:relative;padding:84px 0 92px;background:var(--warm);overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-220px;right:-160px;width:680px;height:680px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,168,143,.16),rgba(0,168,143,0) 68%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.hero h1{
  font-size:clamp(40px,4.5vw,66px);line-height:1.07;font-weight:900;letter-spacing:-.022em;
}
.hero h1 em{font-style:normal;color:var(--brand-dark);position:relative}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:12px;background:rgba(0,168,143,.16);border-radius:6px;z-index:-1;
}
.hero-sub{margin-top:24px;font-size:18px;line-height:1.85;color:var(--graphite);max-width:580px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.trust-bar{
  display:flex;flex-wrap:wrap;gap:12px 30px;margin-top:40px;padding-top:26px;border-top:1px dashed var(--line);
}
.trust-bar li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--graphite)}
.trust-bar i{color:var(--brand);font-size:13px}
.hero-visual{position:relative}
.hero-visual .frame{
  border-radius:22px;overflow:hidden;box-shadow:var(--sh-lg);border:1px solid rgba(255,255,255,.6);
  background:#fff;
}
.hero-visual .frame img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s ease}
.hero-visual .frame:hover img{transform:scale(1.03)}
.float-card{
  position:absolute;left:-26px;bottom:-28px;background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:18px 22px;box-shadow:var(--sh-lg);min-width:212px;
}
.float-card .fc-num{font-size:30px;font-weight:900;letter-spacing:-.02em;color:var(--brand-dark);line-height:1.1}
.float-card .fc-label{font-size:13px;color:var(--graphite);margin-top:4px}
.status-chip{
  position:absolute;top:-16px;right:-14px;background:var(--ink);color:#fff;border-radius:var(--r-pill);
  padding:9px 18px;font-size:13px;font-weight:600;display:flex;align-items:center;gap:8px;box-shadow:var(--sh-lg);
}
.status-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(0,168,143,.2)}

/* ============ 价值主张 ============ */
.value-lead{font-size:clamp(24px,2.6vw,34px);line-height:1.4;font-weight:800;letter-spacing:-.015em;max-width:900px}
.value-lead span{color:var(--brand-dark)}
.value-points{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:56px;border-top:1px solid var(--line)}
.value-points li{padding:34px 34px 0 0;position:relative}
.value-points li + li{padding-left:34px;border-left:1px solid var(--line)}
.value-points .vp-idx{font-size:14px;font-weight:800;color:var(--accent);letter-spacing:.12em}
.value-points h3{margin-top:12px}
.value-points p{margin-top:10px;color:var(--graphite);font-size:15.5px;line-height:1.8}

/* ============ 功能分组 ============ */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;height:100%;
  display:flex;flex-direction:column;overflow:hidden;
}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(14,21,19,.11);border-color:rgba(0,168,143,.3)}
.card:hover h3{color:var(--brand-dark)}
.card-body{padding:26px 28px 28px;display:flex;flex-direction:column;flex:1}
.card-body h3{transition:color .28s ease}
.card-body p{margin-top:12px;color:var(--graphite);font-size:15.5px;line-height:1.8}
.card-foot{margin-top:auto;padding-top:20px}
.card-media{overflow:hidden;background:var(--warm)}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s ease}
.card:hover .card-media img{transform:scale(1.03)}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;
  padding:5px 13px;border-radius:var(--r-pill);background:var(--brand-light);color:var(--brand-dark);letter-spacing:.03em;
}
.tag-accent{background:rgba(255,107,53,.12);color:var(--accent-dark)}
.tag-ink{background:rgba(14,21,19,.07);color:var(--ink)}
.card-wide{flex-direction:row;align-items:stretch}
.card-wide .card-media{flex:0 0 42%}
.card-wide .card-media img{height:100%;aspect-ratio:auto}
.icon-badge{
  width:46px;height:46px;border-radius:14px;background:var(--brand-light);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:18px;
}
.icon-badge.accent{background:rgba(255,107,53,.12);color:var(--accent-dark)}
.icon-badge.ink{background:rgba(14,21,19,.07);color:var(--ink)}

/* ============ 使用场景 ============ */
.scene{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;padding:56px 0}
.scene + .scene{border-top:1px solid var(--line)}
.scene.rev .scene-media{order:-1}
.scene-idx{font-size:52px;font-weight:900;line-height:1;color:var(--brand-light);letter-spacing:-.04em;-webkit-text-stroke:1.5px var(--brand);}
.scene-text h3{margin-top:16px;font-size:clamp(23px,2.4vw,30px);line-height:1.3}
.scene-text p{margin-top:16px;color:var(--graphite);font-size:16.5px;line-height:1.85;max-width:540px}
.scene-list{margin-top:22px;display:flex;flex-direction:column;gap:10px}
.scene-list li{display:flex;gap:10px;align-items:flex-start;font-size:15.5px;color:var(--ink)}
.scene-list i{color:var(--brand);margin-top:6px;font-size:13px}
.scene-media{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);border:1px solid var(--line)}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .5s ease}
.scene-media:hover img{transform:scale(1.03)}

/* ============ 案例 ============ */
.logo-wall{
  display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;margin-bottom:56px;
}
.logo-wall div{
  background:#fff;padding:26px 12px;text-align:center;font-size:14.5px;font-weight:700;color:var(--graphite);
  transition:color .28s ease,background-color .28s ease;
}
.logo-wall div:hover{color:var(--brand-dark);background:var(--brand-light)}
.metric{font-size:32px;font-weight:900;letter-spacing:-.02em;color:var(--brand-dark);line-height:1.15}
.metric small{display:block;font-size:13px;font-weight:600;color:var(--graphite);letter-spacing:0;margin-top:6px}
.case-card{border-left:3px solid var(--brand)}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:start}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:34px 30px;box-shadow:var(--sh);
  display:flex;flex-direction:column;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.price-card:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(14,21,19,.11)}
.price-card.featured{
  border:2px solid var(--brand);box-shadow:0 22px 54px rgba(0,168,143,.18);transform:translateY(-14px);position:relative;
  background:linear-gradient(180deg,#fff 0%,#F4FCFA 100%);
}
.price-card.featured:hover{transform:translateY(-18px)}
.price-card.featured::before{
  content:"推荐";position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--accent);color:#fff;font-size:12.5px;font-weight:800;letter-spacing:.1em;
  padding:6px 18px;border-radius:var(--r-pill);box-shadow:0 8px 20px rgba(255,107,53,.32);
}
.price-tier{font-size:17px;font-weight:800}
.price-desc{font-size:14px;color:var(--graphite);margin-top:6px}
.price-amount{margin:22px 0 6px;font-size:44px;font-weight:900;letter-spacing:-.03em;line-height:1}
.price-amount span{font-size:15px;font-weight:600;color:var(--graphite);letter-spacing:0;margin-left:6px}
.price-feats{margin:26px 0 30px;display:flex;flex-direction:column;gap:12px}
.price-feats li{display:flex;gap:10px;font-size:15px;color:var(--graphite);line-height:1.7}
.price-feats i{color:var(--brand);margin-top:6px;font-size:13px}
.price-card .btn{width:100%;margin-top:auto}
.compare-wrap{margin-top:64px;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff;box-shadow:var(--sh)}
.compare-scroll{overflow-x:auto}
.compare-table{min-width:720px;font-size:15px}
.compare-table th,.compare-table td{padding:16px 22px;text-align:left;border-bottom:1px solid var(--line)}
.compare-table thead th{background:var(--ink);color:#fff;font-weight:700;font-size:14.5px;letter-spacing:.02em}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr:hover{background:var(--warm)}
.compare-table td:first-child{font-weight:600}
.compare-table .yes{color:var(--brand-dark);font-weight:700}

/* ============ 资讯 ============ */
.post-card{display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
.post-card:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(14,21,19,.11);border-color:rgba(0,168,143,.3)}
.post-card:hover h3{color:var(--brand-dark)}
.post-media{position:relative;overflow:hidden}
.post-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s ease}
.post-card:hover .post-media img{transform:scale(1.04)}
.post-media .tag{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.94);color:var(--brand-dark)}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.post-body h3{font-size:18px;line-height:1.5;font-weight:700;transition:color .28s ease;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body p{margin-top:10px;font-size:14.5px;color:var(--graphite);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--graphite);border-top:1px dashed var(--line)}
.post-meta i{color:var(--brand);margin-right:6px}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;padding:64px 28px;text-align:center;
}
.empty-state i{font-size:36px;color:var(--line);margin-bottom:16px;display:block}
.empty-state p{color:var(--graphite);font-size:15.5px}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:940px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .3s ease,box-shadow .3s ease}
.faq-item:hover{border-color:rgba(0,168,143,.34);box-shadow:var(--sh)}
.faq-item.is-open{border-color:var(--brand);box-shadow:0 12px 34px rgba(0,168,143,.12)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;
  padding:22px 26px;font-size:18px;font-weight:700;line-height:1.5;transition:color .25s ease;
}
.faq-item.is-open .faq-q{color:var(--brand-dark)}
.faq-q .plus{
  flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--warm);color:var(--graphite);
  display:flex;align-items:center;justify-content:center;font-size:13px;transition:.3s ease;
}
.faq-item.is-open .plus{background:var(--brand);color:#fff;transform:rotate(135deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s ease}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a-inner{
  padding:0 26px 24px 26px;border-left:3px solid var(--brand);margin-left:26px;padding-left:20px;
}
.faq-a-inner p{color:var(--graphite);font-size:16px;line-height:1.85}

/* ============ 底部 CTA ============ */
.cta-band{background:var(--ink);position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,168,143,.28),rgba(0,168,143,0) 66%);
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:44px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(28px,3.2vw,42px);line-height:1.18;font-weight:900;letter-spacing:-.02em;color:#fff;max-width:720px}
.cta-inner p{margin-top:16px;color:rgba(255,255,255,.72);font-size:16.5px;max-width:640px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:76px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:56px}
.site-footer h4{color:#fff;font-size:15px;font-weight:800;letter-spacing:.06em;margin-bottom:20px}
.site-footer p{font-size:14.5px;line-height:1.85}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.foot-brand .brand-mark{box-shadow:none}
.foot-brand strong{color:#fff;font-size:16.5px;font-weight:800}
.foot-links{display:flex;flex-direction:column;gap:12px}
.foot-links a{font-size:14.5px;transition:color .25s ease,transform .25s ease;display:inline-block}
.foot-links a:hover{color:var(--brand);transform:translateX(3px)}
.foot-contact li{font-size:14.5px;line-height:1.9;display:flex;gap:10px;align-items:flex-start}
.foot-contact i{color:var(--brand);margin-top:6px;font-size:13px}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.11);padding:24px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13.5px;color:rgba(255,255,255,.5);
}
.foot-bottom a:hover{color:var(--brand)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .hero-grid{gap:44px}
}
@media (max-width:1024px){
  .wrap{padding:0 26px}
  .sec{padding:76px 0}
  .main-nav,.mega-wrap{display:none}
  .nav-toggle{display:inline-flex}
  .nav-inner{height:70px;gap:16px}
  .nav-actions .btn{display:none}
  .hero{padding:60px 0 74px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-sub{max-width:100%}
  .float-card{left:auto;right:12px;bottom:-24px}
  .value-points{grid-template-columns:1fr;border-top:1px solid var(--line)}
  .value-points li{padding:28px 0 0}
  .value-points li + li{padding-left:0;border-left:0;border-top:1px solid var(--line)}
  .scene{grid-template-columns:1fr;gap:32px;padding:44px 0}
  .scene.rev .scene-media{order:0}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .price-grid{grid-template-columns:1fr;gap:22px}
  .price-card.featured{transform:none}
  .price-card.featured:hover{transform:translateY(-4px)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:767px){
  .sec{padding:60px 0}
  .sec-head{margin-bottom:38px}
  .wrap{padding:0 22px}
  .hero h1{font-size:clamp(32px,8vw,42px)}
  .hero-sub{font-size:16.5px}
  .hero-cta .btn{width:100%}
  .float-card{position:static;margin-top:18px;width:100%;min-width:0}
  .status-chip{top:-14px;right:0}
  .card-wide{flex-direction:column}
  .card-wide .card-media{flex:0 0 auto}
  .card-wide .card-media img{aspect-ratio:16/10}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr}
  .faq-q{padding:18px 20px;font-size:16.5px}
  .faq-a-inner{margin-left:16px;padding:0 20px 20px 16px}
  .brand-text small{display:none}
  .brand-text strong{font-size:15.5px}
  .mega-panel{display:none}
}
@media (max-width:520px){
  .value-lead{font-size:22px}
  .price-amount{font-size:36px}
}

/* roulang page: category1 */
:root{
  --brand:#00A88F;--brand-deep:#007D6B;--brand-soft:#E6F7F3;
  --accent:#FF6B35;--signal:#F5C542;
  --ink:#0E1513;--graphite:#5B6661;--line:#E7EBE6;--paper:#F7F8F5;--white:#FFFFFF;
  --r-card:18px;--r-img:12px;--r-input:12px;--r-pill:999px;
  --sh-sm:0 4px 14px rgba(14,21,19,.05);
  --sh:0 10px 30px rgba(14,21,19,.06);
  --sh-lg:0 18px 48px rgba(14,21,19,.14);
  --maxw:1280px;--gut:32px;
  --ease:.3s cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--white);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:17px;line-height:1.8;font-weight:400;letter-spacing:0}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(40px,4.6vw,64px);line-height:1.08}
h2{font-size:clamp(30px,3.2vw,46px);line-height:1.15}
h3{font-size:clamp(21px,1.7vw,26px);line-height:1.3;font-weight:800}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(0,168,143,.4);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.section{padding:104px 0}
.section--tight{padding:76px 0}
.section--paper{background:var(--paper)}
.section--soft{background:var(--brand-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand-deep)}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:52px}
.sec-head .lead{max-width:660px}
.sec-head p{margin-top:16px;color:var(--graphite);font-size:17px}
.sec-head--center{display:block;text-align:center;max-width:760px;margin:0 auto 52px}
.sec-head--center p{margin-left:auto;margin-right:auto}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(247,248,245,.94);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line);transition:box-shadow var(--ease)}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(14,21,19,.09)}
.nav-row{display:flex;align-items:center;gap:28px;min-height:76px}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{width:40px;height:40px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;
  font-weight:900;font-size:19px;letter-spacing:0}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:17px;font-weight:900;letter-spacing:-.01em}
.logo-text em{font-style:normal;font-size:11.5px;color:var(--graphite);letter-spacing:.16em}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{position:relative;padding:10px 14px;border-radius:var(--r-pill);font-size:15.5px;font-weight:600;
  color:var(--graphite);transition:color var(--ease),background var(--ease)}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);border-radius:2px}
.nav-link:hover{color:var(--ink);background:var(--brand-soft)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-deep);background:var(--brand-soft)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.mega-wrap{position:relative}
.mega-trigger{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid var(--line);
  border-radius:var(--r-pill);background:#fff;font-size:14.5px;font-weight:700;color:var(--ink);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease)}
.mega-trigger i{font-size:11px;transition:transform var(--ease);color:var(--brand)}
.mega-trigger:hover{border-color:rgba(0,168,143,.5);box-shadow:var(--sh-sm);transform:translateY(-1px)}
.mega-wrap.is-open .mega-trigger i{transform:rotate(180deg)}
.mega-panel{position:absolute;right:0;top:calc(100% + 14px);width:640px;background:#fff;border:1px solid var(--line);
  border-radius:20px;box-shadow:var(--sh-lg);padding:26px;opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease)}
.mega-wrap:hover .mega-panel,.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:26px}
.mega-col h5{margin:0 0 14px;font-size:12px;letter-spacing:.16em;color:var(--graphite);font-weight:800;text-transform:uppercase}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mega-cats a{padding:9px 12px;border-radius:10px;background:var(--paper);font-size:14px;font-weight:600;
  color:var(--graphite);transition:all var(--ease)}
.mega-cats a:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateX(3px)}
.mega-news li{padding:10px 0;border-bottom:1px dashed var(--line)}
.mega-news li:last-child{border-bottom:0}
.mega-news a{font-size:14.5px;font-weight:600;line-height:1.5;display:block;transition:color var(--ease)}
.mega-news a:hover{color:var(--brand-deep)}
.mega-news span{display:block;font-size:12px;color:var(--graphite);margin-top:4px}
.mega-foot{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;gap:18px;background:var(--ink);border-radius:16px;padding:18px 20px;color:#fff}
.mega-foot strong{display:block;font-size:15px}
.mega-foot span{font-size:13px;color:rgba(255,255,255,.66)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;
  color:var(--ink);font-size:17px;margin-left:auto}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:14px 26px;border-radius:var(--r-pill);
  font-size:15.5px;font-weight:700;transition:transform var(--ease),background var(--ease),box-shadow var(--ease),
  border-color var(--ease),color var(--ease);border:1px solid transparent;white-space:nowrap}
.btn i{font-size:13px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(0,168,143,.24)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,125,107,.3)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,107,53,.26)}
.btn-accent:hover{background:#E85A26;transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,107,53,.32)}
.btn-ghost{border-color:var(--line);background:#fff;color:var(--ink)}
.btn-ghost:hover{border-color:rgba(0,168,143,.55);background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-sm{padding:11px 20px;font-size:14.5px}
.btn-block{width:100%}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:700;color:var(--brand-deep)}
.link-more i{transition:transform var(--ease)}
.link-more:hover i{transform:translateX(4px)}

/* ============ page hero ============ */
.page-hero{position:relative;overflow:hidden;background:var(--ink);color:#fff}
.page-hero .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.42;
  transform:scale(1.02)}
.page-hero .hero-veil{position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(14,21,19,.94) 0%,rgba(14,21,19,.78) 46%,rgba(0,125,107,.42) 100%)}
.hero-inner{position:relative;padding:76px 0 68px;max-width:900px}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:rgba(255,255,255,.62);margin-bottom:22px}
.breadcrumb a{transition:color var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:rgba(255,255,255,.34)}
.hero-tag{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:var(--r-pill);
  background:rgba(0,168,143,.18);border:1px solid rgba(0,168,143,.45);color:#8CE7D8;font-size:13px;font-weight:700;
  letter-spacing:.06em;margin-bottom:22px}
.hero-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(255,107,53,.2)}
.page-hero h1{color:#fff;max-width:16em}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{margin-top:22px;font-size:18px;line-height:1.85;color:rgba(255,255,255,.78);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:42px;padding-top:26px;
  border-top:1px solid rgba(255,255,255,.14)}
.hero-meta li{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.7)}
.hero-meta i{color:var(--brand);font-size:15px}
.hero-meta b{color:#fff;font-weight:800}

/* ============ entry cards (2+1+1) ============ */
.entry-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.entry-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;gap:14px}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:rgba(0,168,143,.32)}
.entry-card:hover h3{color:var(--brand-deep)}
.entry-card h3{transition:color var(--ease)}
.entry-card p{color:var(--graphite);font-size:15.5px}
.entry-lg{grid-column:span 6;grid-row:span 2;padding:0;overflow:hidden;gap:0}
.entry-lg figure{margin:0;position:relative;height:300px;overflow:hidden}
.entry-lg figure img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .45s ease}
.entry-lg:hover figure img{transform:scale(1.03)}
.entry-lg .entry-body{padding:30px;display:flex;flex-direction:column;gap:14px;flex:1}
.entry-a{grid-column:span 3}
.entry-b{grid-column:span 3}
.entry-c{grid-column:span 6}
.entry-num{font-size:13px;font-weight:900;letter-spacing:.14em;color:var(--accent)}
.icon-badge{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:var(--brand-soft);
  color:var(--brand-deep);font-size:18px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}
.chip{padding:6px 12px;border-radius:var(--r-pill);background:var(--paper);border:1px solid var(--line);
  font-size:12.5px;font-weight:600;color:var(--graphite)}
.chip--brand{background:var(--brand-soft);border-color:rgba(0,168,143,.28);color:var(--brand-deep)}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.step{position:relative;padding:0 26px 0 0}
.step::before{content:"";position:absolute;left:0;top:26px;width:100%;height:1px;background:var(--line);z-index:0}
.step:last-child::before{display:none}
.step-dot{position:relative;z-index:1;width:54px;height:54px;border-radius:16px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-weight:900;font-size:17px;letter-spacing:.02em;margin-bottom:24px;
  transition:background var(--ease),transform var(--ease)}
.step:hover .step-dot{background:var(--brand);transform:translateY(-4px)}
.step h3{margin-bottom:10px;font-size:20px}
.step p{color:var(--graphite);font-size:15px}

/* ============ dark panel ============ */
.dark-panel{background:var(--ink);color:#fff;border-radius:26px;padding:56px 52px;position:relative;overflow:hidden}
.dark-panel::after{content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,168,143,.35),transparent 68%)}
.dark-panel h2{color:#fff}
.dark-panel .lead{color:rgba(255,255,255,.72);margin-top:16px;max-width:620px}
.safety{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px;position:relative;z-index:1}
.safety-item{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:24px;
  transition:transform var(--ease),background var(--ease)}
.safety-item:hover{transform:translateY(-4px);background:rgba(255,255,255,.09)}
.safety-item i{font-size:19px;color:var(--brand);margin-bottom:14px;display:block}
.safety-item strong{display:block;font-size:16.5px;margin-bottom:8px}
.safety-item span{font-size:14px;color:rgba(255,255,255,.66);line-height:1.75}

/* ============ tips grid ============ */
.tips{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tip{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.tip:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:rgba(0,168,143,.3)}
.tip .icon-badge{margin-bottom:18px}
.tip h3{font-size:19px;margin-bottom:10px}
.tip p{color:var(--graphite);font-size:15px}
.tip .tip-note{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:13.5px;color:var(--brand-deep);font-weight:600}

/* ============ device strip ============ */
.device-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.device-list li{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.device-list li:last-child{border-bottom:0}
.device-list i{width:42px;height:42px;border-radius:12px;background:var(--brand-soft);color:var(--brand-deep);
  display:grid;place-items:center;font-size:16px;flex:0 0 auto}
.device-list strong{display:block;font-size:16.5px;margin-bottom:4px}
.device-list span{font-size:14.5px;color:var(--graphite)}
.device-figure{position:relative}
.device-figure img{border-radius:20px;box-shadow:var(--sh-lg);width:100%;object-fit:cover;height:420px}
.device-badge{position:absolute;left:-18px;bottom:26px;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:18px 22px;box-shadow:var(--sh-lg)}
.device-badge b{display:block;font-size:26px;font-weight:900;color:var(--brand-deep);line-height:1.1}
.device-badge span{font-size:13px;color:var(--graphite)}

/* ============ FAQ ============ */
.faq-list{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease)}
.faq-item.is-open{border-color:rgba(0,168,143,.4);box-shadow:var(--sh)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;
  padding:22px 24px;font-size:18px;font-weight:800;color:var(--ink);position:relative;transition:color var(--ease)}
.faq-q::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--brand);transform:scaleY(0);transform-origin:top;transition:transform var(--ease)}
.faq-item.is-open .faq-q::before{transform:scaleY(1)}
.faq-q:hover{color:var(--brand-deep)}
.faq-icon{flex:0 0 auto;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);display:grid;
  place-items:center;color:var(--brand);font-size:13px;transition:transform var(--ease),background var(--ease),color var(--ease)}
.faq-item.is-open .faq-icon{background:var(--brand);color:#fff;border-color:var(--brand);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s ease}
.faq-a p{padding:0 24px 24px;color:var(--graphite);font-size:16px;line-height:1.85}

/* ============ CTA ============ */
.cta-band{background:linear-gradient(115deg,var(--ink) 0%,#123028 58%,var(--brand-deep) 100%);color:#fff;
  border-radius:28px;padding:60px 56px;display:flex;align-items:center;justify-content:space-between;gap:40px;
  position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-70px;bottom:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,53,.32),transparent 70%)}
.cta-band h2{color:#fff;font-size:clamp(28px,3vw,42px)}
.cta-band p{color:rgba(255,255,255,.75);margin-top:14px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:#fff;margin-top:96px;padding:72px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.foot-brand .brand-mark{background:var(--brand);color:#0E1513}
.foot-brand strong{font-size:17px;font-weight:900}
.site-footer p{color:rgba(255,255,255,.62);font-size:14.5px;line-height:1.85;max-width:340px}
.site-footer h4{font-size:14px;letter-spacing:.1em;color:rgba(255,255,255,.5);text-transform:uppercase;margin-bottom:20px;font-weight:800}
.foot-links{display:flex;flex-direction:column;gap:12px}
.foot-links a{font-size:14.8px;color:rgba(255,255,255,.8);transition:color var(--ease),transform var(--ease);display:inline-block}
.foot-links a:hover{color:var(--brand);transform:translateX(3px)}
.foot-contact li{display:flex;gap:12px;font-size:14.5px;color:rgba(255,255,255,.7);margin-bottom:14px;line-height:1.7}
.foot-contact i{color:var(--brand);margin-top:5px}
.foot-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:52px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.12);font-size:13.5px;color:rgba(255,255,255,.5)}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* ============ responsive ============ */
@media (max-width:1180px){
  :root{--gut:24px}
  .entry-lg{grid-column:span 12;grid-row:auto}
  .entry-a,.entry-b{grid-column:span 6}
  .entry-c{grid-column:span 12}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .main-nav{display:none}
  .main-nav.is-open{display:flex;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;
    background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 24px 20px;
    gap:4px;box-shadow:0 20px 40px rgba(14,21,19,.12);margin-left:0}
  .main-nav.is-open .nav-link{padding:14px 12px;font-size:16px}
  .nav-toggle{display:grid;place-items:center}
  .nav-actions .btn{display:none}
  .mega-panel{position:fixed;left:24px;right:24px;width:auto;top:auto}
  .steps{grid-template-columns:1fr 1fr;gap:34px 0}
  .step:nth-child(2)::before{display:none}
  .safety{grid-template-columns:1fr}
  .device-grid{grid-template-columns:1fr;gap:34px}
  .device-figure img{height:320px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 32px}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:18px;margin-bottom:34px}
  .entry-a,.entry-b{grid-column:span 12}
  .tips{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:30px}
  .step{padding-right:0}
  .step::before{display:none}
  .dark-panel{padding:38px 24px;border-radius:20px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .mega-grid{grid-template-columns:1fr}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .hero-inner{padding:52px 0 46px}
  .page-hero h1{font-size:34px}
  .hero-actions .btn{width:100%}
  .foot-grid{grid-template-columns:1fr}
  .device-badge{left:12px}
  .entry-card{padding:22px}
}
@media (min-width:1441px){:root{--maxw:1320px}}

/* roulang page: article */
:root{
  --brand:#00A88F;
  --brand-deep:#007D6B;
  --brand-soft:#E6F7F3;
  --accent:#FF6B35;
  --accent-deep:#E2551F;
  --ink:#0E1513;
  --graphite:#5B6661;
  --line:#E7EBE6;
  --warm:#F7F8F5;
  --white:#FFFFFF;
  --signal:#F5C542;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --sh-1:0 10px 30px rgba(14,21,19,.06);
  --sh-2:0 18px 44px rgba(14,21,19,.14);
  --t:.3s cubic-bezier(.4,0,.2,1);
  --max:1320px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4,p{margin:0;}
ul{list-style:none;margin:0;padding:0;}
::selection{background:rgba(0,168,143,.22);}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 32px;}
.skip{position:absolute;left:-9999px;top:0;}
.skip:focus{left:16px;top:12px;z-index:200;background:var(--brand);color:#fff;padding:10px 18px;border-radius:999px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(247,248,245,.94);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(14,21,19,.08);}
.header-inner{display:flex;align-items:center;gap:26px;height:78px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:42px;height:42px;border-radius:13px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;font-weight:900;font-size:20px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px rgba(0,168,143,.28);
}
.brand-text strong{display:block;font-size:17px;font-weight:800;letter-spacing:-.01em;line-height:1.25;}
.brand-text small{display:block;font-size:11.5px;color:var(--graphite);letter-spacing:.14em;line-height:1.5;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 14px;font-size:15.5px;font-weight:600;
  color:var(--graphite);border-radius:10px;
  transition:color var(--t),background var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform var(--t);
}
.nav-link:hover{color:var(--ink);background:rgba(0,168,143,.07);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand-deep);}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  border:none;border-radius:999px;padding:13px 26px;
  font-size:15px;font-weight:700;line-height:1.4;
  transition:background var(--t),color var(--t),transform var(--t),box-shadow var(--t),border-color var(--t);
}
.btn i{font-size:13px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(0,168,143,.26);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,168,143,.34);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,107,53,.28);}
.btn-accent:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,107,53,.36);}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-soft);transform:translateY(-2px);}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.28);}
.btn-light:hover{background:#fff;color:var(--ink);transform:translateY(-2px);}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(0,168,143,.32);}
.btn-sm{padding:10px 19px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- mega ---------- */
.mega-wrap{position:relative;}
.mega-toggle{
  display:inline-flex;align-items:center;gap:7px;
  background:transparent;border:1px solid var(--line);border-radius:999px;
  padding:9px 16px;font-size:14.5px;font-weight:600;color:var(--graphite);
  transition:all var(--t);
}
.mega-toggle:hover,.mega-toggle[aria-expanded="true"]{
  color:var(--brand-deep);border-color:rgba(0,168,143,.42);background:var(--brand-soft);
}
.mega-toggle i{font-size:11px;transition:transform var(--t);}
.mega-toggle[aria-expanded="true"] i{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 16px);
  width:min(880px,calc(100vw - 64px));
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:28px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease;
  z-index:100;
}
.mega-panel.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:32px;}
.mega-col h5{
  font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--graphite);font-weight:700;margin:0 0 16px;
}
.mega-topics{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.mega-topic{
  display:block;padding:13px 15px;border:1px solid var(--line);border-radius:var(--r-sm);
  transition:all var(--t);
}
.mega-topic strong{display:block;font-size:14.5px;font-weight:700;margin-bottom:3px;}
.mega-topic span{display:block;font-size:12.5px;color:var(--graphite);line-height:1.5;}
.mega-topic:hover{border-color:rgba(0,168,143,.4);background:var(--brand-soft);transform:translateY(-2px);}
.mega-topic:hover strong{color:var(--brand-deep);}
.mega-list{display:flex;flex-direction:column;gap:2px;}
.mega-item{
  display:flex;gap:12px;align-items:flex-start;padding:11px 12px;border-radius:var(--r-sm);
  transition:background var(--t);
}
.mega-item:hover{background:var(--warm);}
.mega-item .dot{
  width:7px;height:7px;border-radius:50%;background:var(--brand);
  margin-top:9px;flex-shrink:0;
}
.mega-item b{display:block;font-size:14.5px;font-weight:600;line-height:1.5;}
.mega-item small{display:block;font-size:12px;color:var(--graphite);margin-top:3px;letter-spacing:.02em;}
.mega-foot{
  margin-top:26px;padding:18px 22px;border-radius:var(--r-md);
  background:linear-gradient(120deg,var(--ink),#132a25);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
}
.mega-foot p{color:rgba(255,255,255,.76);font-size:14px;}
.mega-foot strong{color:#fff;display:block;font-size:15px;font-weight:800;margin-bottom:2px;}

/* ---------- mobile drawer ---------- */
.nav-burger{
  display:none;width:44px;height:44px;border-radius:12px;
  background:transparent;border:1px solid var(--line);color:var(--ink);
  align-items:center;justify-content:center;font-size:17px;transition:all var(--t);
}
.nav-burger:hover{border-color:var(--brand);color:var(--brand-deep);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,21,19,.5);
  opacity:0;visibility:hidden;transition:all var(--t);z-index:110;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);
  background:#fff;z-index:120;padding:24px 22px 32px;
  transform:translateX(102%);transition:transform .34s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-head span{font-size:13px;letter-spacing:.16em;color:var(--graphite);font-weight:700;text-transform:uppercase;}
.drawer-close{
  width:40px;height:40px;border-radius:11px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:16px;transition:all var(--t);
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;}
.drawer-link{
  padding:14px 16px;border-radius:var(--r-sm);border:1px solid var(--line);
  font-size:15.5px;font-weight:600;transition:all var(--t);
}
.drawer-link:hover,.drawer-link.is-active{border-color:rgba(0,168,143,.45);background:var(--brand-soft);color:var(--brand-deep);}
.drawer-cta{margin-top:20px;}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;background:var(--ink);
  padding:88px 0 76px;color:#fff;
}
.article-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.34;
}
.article-hero .hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(14,21,19,.95) 0%,rgba(14,21,19,.78) 46%,rgba(0,125,107,.62) 100%);
}
.article-hero .wrap{position:relative;z-index:2;}
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:13.5px;color:rgba(255,255,255,.66);margin-bottom:22px;
}
.crumbs a{transition:color var(--t);}
.crumbs a:hover{color:var(--brand);}
.crumbs i{font-size:10px;opacity:.55;}
.crumb-current{max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:rgba(255,255,255,.9);}
.article-hero h1{
  font-size:clamp(30px,4.3vw,52px);line-height:1.16;font-weight:900;
  letter-spacing:-.02em;max-width:940px;margin-bottom:24px;
}
.article-meta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.article-meta span{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;font-size:13.5px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);
  color:rgba(255,255,255,.88);
}
.article-meta i{font-size:12px;color:var(--brand);}
.article-meta .meta-accent{
  background:rgba(255,107,53,.16);border-color:rgba(255,107,53,.38);color:#FFD9C8;
}
.article-meta .meta-accent i{color:var(--accent);}

/* ---------- article body ---------- */
.article-main{padding:76px 0 8px;background:var(--white);}
.article-body{max-width:860px;margin:0 auto;}
.article-body > *:first-child{margin-top:0;}
.article-body p{font-size:17.5px;line-height:1.92;color:#25302C;margin-bottom:1.45em;}
.article-body h2{
  font-size:clamp(24px,2.8vw,32px);line-height:1.28;font-weight:900;
  letter-spacing:-.015em;margin:2.2em 0 .85em;padding-left:18px;
  border-left:5px solid var(--brand);border-radius:2px;
}
.article-body h3{font-size:22px;line-height:1.4;font-weight:800;margin:1.8em 0 .7em;color:var(--ink);}
.article-body h4{font-size:18.5px;font-weight:800;margin:1.5em 0 .6em;}
.article-body a{color:var(--brand-deep);text-decoration:underline;text-underline-offset:3px;transition:color var(--t);}
.article-body a:hover{color:var(--accent);}
.article-body ul,.article-body ol{margin:0 0 1.5em;padding-left:1.35em;font-size:17.5px;line-height:1.9;color:#25302C;}
.article-body ul{list-style:none;padding-left:0;}
.article-body ul li{position:relative;padding-left:24px;margin-bottom:.6em;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:8px;height:8px;border-radius:2px;background:var(--brand);transform:rotate(45deg);
}
.article-body ol li{margin-bottom:.6em;}
.article-body blockquote{
  margin:1.8em 0;padding:22px 28px;background:var(--brand-soft);
  border-left:5px solid var(--brand);border-radius:var(--r-sm);
  color:#1C3A34;font-size:16.5px;line-height:1.85;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-sm);margin:1.6em 0;box-shadow:var(--sh-1);}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{font-size:13.5px;color:var(--graphite);text-align:center;margin-top:10px;}
.article-body table{
  width:100%;display:block;overflow-x:auto;border-collapse:collapse;
  margin:1.8em 0;font-size:15.5px;
}
.article-body th,.article-body td{
  border:1px solid var(--line);padding:12px 16px;text-align:left;min-width:120px;
}
.article-body th{background:var(--warm);font-weight:800;}
.article-body tr:nth-child(even) td{background:#FCFDFC;}
.article-body code{
  background:var(--warm);border:1px solid var(--line);border-radius:6px;
  padding:2px 7px;font-size:14.5px;color:var(--brand-deep);
}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2.4em 0;}

.article-end{
  max-width:860px;margin:48px auto 0;padding-top:28px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.article-end span{font-size:13.5px;color:var(--graphite);}
.back-link{
  display:inline-flex;align-items:center;gap:9px;font-size:14.5px;font-weight:700;color:var(--brand-deep);
  transition:gap var(--t),color var(--t);
}
.back-link:hover{gap:14px;color:var(--accent);}

/* ---------- empty state ---------- */
.empty-article{
  max-width:720px;margin:0 auto;padding:64px 40px;text-align:center;
  background:var(--warm);border:1px dashed rgba(0,168,143,.4);border-radius:var(--r-lg);
}
.empty-article i{font-size:38px;color:var(--brand);margin-bottom:20px;display:block;}
.empty-article h2{font-size:26px;font-weight:900;margin-bottom:12px;}
.empty-article p{font-size:16px;color:var(--graphite);margin-bottom:26px;line-height:1.85;}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-warm{background:var(--warm);}
.section-ink{background:var(--ink);color:#fff;}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;
  color:var(--brand-deep);margin-bottom:16px;
}
.sec-eyebrow::before{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px;}
.section-ink .sec-eyebrow{color:var(--brand);}
.sec-head h2{
  font-size:clamp(28px,3.4vw,44px);line-height:1.18;font-weight:900;letter-spacing:-.02em;
}
.sec-head p{margin-top:16px;font-size:16.5px;line-height:1.85;color:var(--graphite);}
.section-ink .sec-head p{color:rgba(255,255,255,.68);}

/* ---------- quick entries ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.quick-card{
  position:relative;display:flex;flex-direction:column;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px 26px;box-shadow:var(--sh-1);overflow:hidden;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.quick-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--brand),var(--accent));
  transform:scaleY(0);transform-origin:top;transition:transform var(--t);
}
.quick-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(0,168,143,.35);}
.quick-card:hover::before{transform:scaleY(1);}
.quick-card i{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-deep);font-size:19px;
}
.quick-card h3{font-size:19px;font-weight:800;line-height:1.4;}
.quick-card p{font-size:14.5px;line-height:1.8;color:var(--graphite);}
.quick-card .arrow{
  margin-top:auto;font-size:13.5px;font-weight:800;color:var(--brand-deep);
  display:inline-flex;align-items:center;gap:8px;transition:gap var(--t);
}
.quick-card:hover .arrow{gap:13px;color:var(--accent);}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.post-card:hover{transform:translateY(-5px);box-shadow:var(--sh-2);border-color:rgba(0,168,143,.35);}
.post-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--warm);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.045);}
.post-tag{
  position:absolute;left:14px;top:14px;
  background:rgba(14,21,19,.78);color:#fff;font-size:12px;font-weight:700;
  padding:5px 12px;border-radius:999px;letter-spacing:.04em;
  backdrop-filter:blur(4px);
}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-body h3{font-size:18px;font-weight:800;line-height:1.45;transition:color var(--t);}
.post-card:hover .post-body h3{color:var(--brand-deep);}
.post-body p{font-size:14.5px;line-height:1.8;color:var(--graphite);}
.post-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--graphite);
}
.post-foot .go{color:var(--brand-deep);font-weight:800;transition:transform var(--t);}
.post-card:hover .post-foot .go{transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:82px 0;}
.cta-band .cta-bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;opacity:.26;
}
.cta-band .cta-veil{
  position:absolute;inset:0;
  background:linear-gradient(110deg,rgba(14,21,19,.95),rgba(0,125,107,.78));
}
.cta-band .wrap{position:relative;z-index:2;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:44px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:900;letter-spacing:-.02em;max-width:640px;}
.cta-inner p{margin-top:14px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.72);max-width:600px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#fff;padding:76px 0 28px;}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.4fr;gap:42px;}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px;}
.foot-brand strong{font-size:18px;font-weight:800;letter-spacing:-.01em;}
.site-footer .brand-mark{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 8px 20px rgba(0,168,143,.3);
}
.site-footer p{color:rgba(255,255,255,.6);font-size:14.5px;line-height:1.9;}
.site-footer h4{font-size:15px;font-weight:800;margin-bottom:20px;color:#fff;}
.foot-links{display:flex;flex-direction:column;gap:12px;}
.foot-links a{color:rgba(255,255,255,.64);font-size:14.5px;transition:color var(--t),padding-left var(--t);}
.foot-links a:hover{color:var(--brand);padding-left:4px;}
.foot-contact{display:flex;flex-direction:column;gap:13px;}
.foot-contact li{display:flex;gap:11px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.64);}
.foot-contact i{color:var(--brand);margin-top:5px;flex-shrink:0;}
.foot-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.48);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .wrap{padding:0 28px;}
  .foot-grid{grid-template-columns:1.5fr 1fr 1fr;gap:34px;}
  .foot-grid > div:last-child{grid-column:1 / -1;}
  .foot-contact{flex-direction:row;flex-wrap:wrap;gap:24px;}
}
@media (max-width:1024px){
  .main-nav{display:none;}
  .nav-burger{display:inline-flex;}
  .mega-wrap{display:none;}
  .header-inner{height:70px;}
  .section{padding:68px 0;}
  .quick-grid{grid-template-columns:1fr 1fr;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .mega-grid{grid-template-columns:1fr;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .wrap{padding:0 24px;}
  .brand-text small{display:none;}
  .header-actions .btn-primary{display:none;}
  .article-hero{padding:60px 0 52px;}
  .article-hero h1{font-size:clamp(26px,6vw,34px);}
  .article-main{padding:52px 0 0;}
  .article-body p,.article-body ul,.article-body ol{font-size:16.5px;line-height:1.88;}
  .article-body h2{font-size:23px;padding-left:14px;border-left-width:4px;}
  .article-body h3{font-size:19.5px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .sec-head{margin-bottom:32px;}
  .quick-grid,.related-grid{grid-template-columns:1fr;}
  .related-grid{gap:18px;}
  .cta-band{padding:60px 0;}
  .cta-inner{gap:28px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .foot-grid > div:first-child{grid-column:1 / -1;}
  .foot-grid > div:last-child{grid-column:1 / -1;}
  .foot-contact{flex-direction:column;gap:13px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .article-end{flex-direction:column;align-items:flex-start;}
  .empty-article{padding:46px 24px;}
}
@media (max-width:520px){
  .wrap{padding:0 18px;}
  .btn{padding:12px 22px;font-size:14.5px;}
  .quick-card{padding:22px 20px;}
  .post-body{padding:18px 20px 20px;}
  .crumbs{font-size:12.5px;}
  .crumb-current{max-width:180px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --c-primary:#00A88F;
  --c-primary-dark:#007D6B;
  --c-primary-soft:#E6F7F3;
  --c-accent:#FF6B35;
  --c-ink:#0E1513;
  --c-graphite:#5B6661;
  --c-line:#E7EBE6;
  --c-warm:#F7F8F5;
  --c-white:#FFFFFF;
  --c-signal:#F5C542;
  --font-cn:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular","JetBrains Mono",Consolas,"Courier New",monospace;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-mega:20px;
  --sh-card:0 10px 30px rgba(14,21,19,.06);
  --sh-hover:0 18px 44px rgba(14,21,19,.13);
  --t:.3s cubic-bezier(.2,.7,.3,1);
  --container:1280px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-white);
  font-weight:400;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--c-primary-dark);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--c-primary);}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img);}
button{font-family:inherit;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0 0 16px;font-weight:800;letter-spacing:-.02em;color:var(--c-ink);}
h1{font-size:clamp(38px,5.2vw,64px);line-height:1.06;}
h2{font-size:clamp(28px,3.4vw,44px);line-height:1.16;}
h3{font-size:clamp(20px,2vw,26px);line-height:1.32;font-weight:800;}
h4{font-size:16px;line-height:1.4;font-weight:800;letter-spacing:0;}

:focus-visible{outline:3px solid rgba(0,168,143,.4);outline-offset:2px;border-radius:6px;}

.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1441px){ .wrap{max-width:1320px;padding:0 32px;} }

/* 覆盖 Foundation 默认观感 */
.grid-x{margin-left:-10px;margin-right:-10px;}
.grid-x>.cell{padding-left:10px;padding-right:10px;}
.grid-margin-x{margin-left:-10px;margin-right:-10px;}
.grid-margin-x>.cell{padding-left:10px;padding-right:10px;}
table{border-collapse:collapse;width:100%;margin:0;}
.button{font-family:var(--font-cn);text-transform:none;letter-spacing:0;}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(247,248,245,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(14,21,19,.08);background:rgba(255,255,255,.97);}
.head-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;font-weight:900;font-size:20px;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px rgba(0,168,143,.32);letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--c-graphite);letter-spacing:.04em;}

.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;font-size:15px;font-weight:600;
  color:var(--c-graphite);transition:color var(--t),background var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--c-primary-dark);background:var(--c-primary-soft);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary-dark);background:var(--c-primary-soft);}
.nav-link.is-active::after{transform:scaleX(1);}

.head-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

.nav-mega{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;border:1px solid var(--c-line);color:var(--c-ink);
  height:42px;padding:0 16px;border-radius:999px;font-size:14px;font-weight:700;
  transition:border-color var(--t),color var(--t),background var(--t);
}
.mega-trigger:hover{border-color:var(--c-primary);color:var(--c-primary-dark);background:var(--c-primary-soft);}
.mega-trigger i{font-size:11px;transition:transform var(--t);}
.nav-mega:hover .mega-trigger i,.nav-mega.is-open .mega-trigger i{transform:rotate(180deg);}

.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;width:620px;
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-mega);
  box-shadow:0 24px 60px rgba(14,21,19,.14);
  padding:24px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
.nav-mega:hover .mega-panel,.nav-mega.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:22px;}
.mega-col h4{font-size:13px;color:var(--c-graphite);letter-spacing:.08em;text-transform:none;margin-bottom:12px;font-weight:700;}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
.mega-cats a{
  display:block;padding:10px 12px;border-radius:10px;background:var(--c-warm);
  font-size:14px;font-weight:600;color:var(--c-ink);border:1px solid transparent;transition:all var(--t);
}
.mega-cats a:hover{background:var(--c-primary-soft);border-color:rgba(0,168,143,.3);color:var(--c-primary-dark);}
.mega-posts li{padding:9px 0;border-bottom:1px dashed var(--c-line);}
.mega-posts li:last-child{border-bottom:0;}
.mega-posts a{display:flex;justify-content:space-between;gap:12px;font-size:14px;font-weight:600;color:var(--c-ink);}
.mega-posts a span{color:var(--c-graphite);font-size:12px;font-family:var(--font-mono);flex:0 0 auto;}
.mega-posts a:hover{color:var(--c-primary);}
.mega-entry{
  margin-top:18px;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 18px;border-radius:14px;background:var(--c-ink);color:#fff;
}
.mega-entry strong{display:block;font-size:15px;font-weight:800;}
.mega-entry span{font-size:13px;color:rgba(255,255,255,.66);}
.mega-entry a{
  flex:0 0 auto;background:var(--c-primary);color:#fff;padding:9px 16px;border-radius:999px;
  font-size:13px;font-weight:700;transition:background var(--t),transform var(--t);
}
.mega-entry a:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);}

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

.mobile-drawer{
  display:none;border-top:1px solid var(--c-line);background:var(--c-white);
  padding:16px 24px 26px;
}
.mobile-drawer.is-open{display:block;}
.drawer-group{margin-bottom:18px;}
.drawer-group h4{font-size:13px;color:var(--c-graphite);letter-spacing:.08em;margin-bottom:10px;}
.drawer-group a{
  display:block;padding:12px 14px;border-radius:12px;font-size:15px;font-weight:600;
  color:var(--c-ink);background:var(--c-warm);margin-bottom:8px;border:1px solid transparent;
}
.drawer-group a:hover,.drawer-group a.is-active{background:var(--c-primary-soft);border-color:rgba(0,168,143,.28);color:var(--c-primary-dark);}
.drawer-cta{display:block;text-align:center;background:var(--c-primary);color:#fff;padding:14px;border-radius:12px;font-weight:700;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:52px;padding:0 28px;border-radius:999px;font-size:16px;font-weight:700;
  border:1px solid transparent;transition:all var(--t);white-space:nowrap;
}
.btn i{font-size:13px;}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px rgba(0,168,143,.28);}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 16px 32px rgba(0,125,107,.34);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 10px 24px rgba(255,107,53,.3);}
.btn-accent:hover{background:#e85a26;color:#fff;transform:translateY(-2px);box-shadow:0 16px 34px rgba(232,90,38,.36);}
.btn-ghost{background:transparent;border-color:rgba(14,21,19,.22);color:var(--c-ink);}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-primary-soft);color:var(--c-primary-dark);transform:translateY(-2px);}
.btn-sm{height:42px;padding:0 20px;font-size:14px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--c-primary-dark);
}
.link-arrow i{transition:transform var(--t);font-size:12px;}
.link-arrow:hover i{transform:translateX(4px);}

/* 分类页 Hero */
.cat-hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(100deg,rgba(9,17,15,.92) 0%,rgba(9,17,15,.78) 46%,rgba(0,125,107,.55) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  padding:74px 0 62px;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:100% 46px;opacity:.5;
}
.cat-hero .wrap{position:relative;z-index:2;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68);margin-bottom:20px;}
.crumb a{color:rgba(255,255,255,.82);}
.crumb a:hover{color:#fff;}
.crumb i{font-size:10px;}
.cat-hero h1{color:#fff;max-width:900px;}
.cat-hero h1 .hl{color:#5DE3C9;}
.cat-hero .lead{
  max-width:720px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.8);margin:20px 0 0;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-actions .btn-ghost{border-color:rgba(255,255,255,.32);color:#fff;}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}
.hero-status{
  display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:34px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.16);font-size:13px;color:rgba(255,255,255,.72);
}
.hero-status span{display:inline-flex;align-items:center;gap:8px;}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--c-signal);box-shadow:0 0 0 4px rgba(245,197,66,.22);}
.dot-ok{width:8px;height:8px;border-radius:50%;background:#5DE3C9;box-shadow:0 0 0 4px rgba(93,227,201,.2);}

/* 通用区块 */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-warm{background:var(--c-warm);}
.section-ink{background:var(--c-ink);color:#fff;}
.section-ink h2,.section-ink h3{color:#fff;}
.sec-head{max-width:760px;margin-bottom:48px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--c-primary-dark);background:var(--c-primary-soft);padding:7px 14px;border-radius:999px;margin-bottom:16px;
}
.section-ink .kicker{background:rgba(0,168,143,.16);color:#5DE3C9;}
.sec-head p{font-size:17px;color:var(--c-graphite);margin:0;}
.section-ink .sec-head p{color:rgba(255,255,255,.7);}

/* 卡片 */
.card{
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-card);height:100%;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(0,168,143,.32);}
.card:hover h3{color:var(--c-primary-dark);}
.card h3{transition:color var(--t);margin-bottom:10px;}
.card p{color:var(--c-graphite);font-size:15.5px;margin-bottom:14px;}
.card-media{border-radius:var(--r-img);overflow:hidden;margin-bottom:20px;}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);transition:transform .45s ease;}
.card:hover .card-media img{transform:scale(1.03);}
.chip{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;
  padding:5px 11px;border-radius:999px;background:var(--c-primary-soft);color:var(--c-primary-dark);
}
.chip-accent{background:rgba(255,107,53,.12);color:#D64815;}
.chip-ink{background:rgba(255,255,255,.1);color:#5DE3C9;}
.chip-signal{background:rgba(245,197,66,.18);color:#8A6A00;}
.card-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--c-graphite);}

/* 功能矩阵 */
.feat-main{display:flex;flex-direction:column;height:100%;}
.feat-main .card-media{margin-bottom:22px;}
.feat-main .card-media img{aspect-ratio:16/9;}
.feat-list{margin-top:6px;display:grid;gap:10px;}
.feat-list li{
  display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--c-graphite);
  padding-bottom:10px;border-bottom:1px dashed var(--c-line);
}
.feat-list li:last-child{border-bottom:0;padding-bottom:0;}
.feat-list i{color:var(--c-primary);font-size:13px;margin-top:6px;}
.feat-stack{display:grid;gap:20px;height:100%;}
.num-tag{
  font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--c-primary);
  letter-spacing:.06em;margin-bottom:10px;display:block;
}

/* 交替图文 */
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:36px 0;}
.alt-row + .alt-row{border-top:1px solid var(--c-line);}
.alt-row.reverse .alt-text{order:2;}
.alt-row.reverse .alt-media{order:1;}
.alt-index{
  font-family:var(--font-mono);font-size:14px;font-weight:700;color:var(--c-primary);
  letter-spacing:.14em;display:inline-block;margin-bottom:14px;
}
.alt-text h3{font-size:clamp(22px,2.2vw,28px);}
.alt-text p{color:var(--c-graphite);}
.alt-media{position:relative;border-radius:18px;overflow:hidden;box-shadow:0 20px 50px rgba(14,21,19,.14);}
.alt-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px;transition:transform .5s ease;}
.alt-media:hover img{transform:scale(1.03);}
.alt-badge{
  position:absolute;left:16px;bottom:16px;background:rgba(14,21,19,.86);color:#fff;
  padding:10px 16px;border-radius:999px;font-size:13px;font-weight:700;backdrop-filter:blur(6px);
}
.mini-stats{display:flex;gap:26px;flex-wrap:wrap;margin-top:18px;}
.mini-stats b{display:block;font-size:24px;font-weight:900;color:var(--c-primary-dark);letter-spacing:-.02em;line-height:1.2;}
.mini-stats span{font-size:13px;color:var(--c-graphite);}

/* 对比表 */
.table-shell{
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;
}
.table-scroll{overflow-x:auto;}
.cmp-table{min-width:720px;font-size:15px;}
.cmp-table th,.cmp-table td{padding:18px 22px;text-align:left;border-bottom:1px solid var(--c-line);}
.cmp-table thead th{
  background:var(--c-warm);font-size:14px;font-weight:800;color:var(--c-ink);white-space:nowrap;
}
.cmp-table thead th:first-child{color:var(--c-graphite);}
.cmp-table tbody th{font-weight:700;color:var(--c-ink);background:var(--c-white);white-space:nowrap;}
.cmp-table tbody td{color:var(--c-graphite);}
.cmp-table tbody tr:hover td,.cmp-table tbody tr:hover th{background:#FBFCFA;}
.cmp-table tbody tr:last-child th,.cmp-table tbody tr:last-child td{border-bottom:0;}
.cmp-table i.yes{color:var(--c-primary);margin-right:6px;}
.cmp-table i.part{color:var(--c-signal);margin-right:6px;}

/* 案例 */
.logo-strip{
  display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-bottom:44px;
}
.logo-strip span{
  display:flex;align-items:center;justify-content:center;height:64px;border-radius:14px;
  background:var(--c-warm);border:1px solid var(--c-line);color:var(--c-graphite);
  font-weight:800;font-size:14px;letter-spacing:.02em;transition:all var(--t);text-align:center;padding:0 8px;
}
.logo-strip span:hover{background:var(--c-white);border-color:rgba(0,168,143,.32);color:var(--c-primary-dark);transform:translateY(-3px);}
.case-card .card-media img{aspect-ratio:16/9;}
.case-metrics{display:flex;gap:24px;flex-wrap:wrap;margin:6px 0 14px;}
.case-metrics b{display:block;font-size:26px;font-weight:900;color:var(--c-ink);letter-spacing:-.02em;line-height:1.15;}
.case-metrics span{font-size:13px;color:var(--c-graphite);}
.case-quote{
  font-size:14.5px;color:var(--c-graphite);border-left:3px solid var(--c-primary);
  padding:4px 0 4px 14px;margin:0 0 16px;background:linear-gradient(90deg,var(--c-primary-soft),transparent 70%);
}

/* FAQ */
.faq-list{display:grid;gap:14px;max-width:940px;margin:0 auto;}
.faq-item{
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:rgba(0,168,143,.3);box-shadow:var(--sh-card);}
.faq-item.is-open{border-color:rgba(0,168,143,.4);box-shadow:var(--sh-card);}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 24px;font-size:18px;font-weight:800;color:var(--c-ink);line-height:1.45;
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:var(--c-primary);transform:scaleY(0);transform-origin:top;transition:transform var(--t);
}
.faq-item.is-open .faq-q::before{transform:scaleY(1);}
.faq-icon{
  flex:0 0 auto;width:30px;height:30px;border-radius:50%;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;color:var(--c-primary-dark);
  font-size:13px;transition:all var(--t);
}
.faq-item.is-open .faq-icon{background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s ease;}
.faq-a-inner{padding:0 24px 24px 24px;color:var(--c-graphite);font-size:16px;line-height:1.85;}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-ink);border-radius:24px;
  padding:64px 56px;color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,168,143,.5),transparent 68%);
}
.cta-band::before{
  content:"";position:absolute;left:-60px;bottom:-120px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,53,.34),transparent 70%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;}
.cta-inner h2{color:#fff;margin-bottom:14px;}
.cta-inner p{color:rgba(255,255,255,.72);margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.34);color:#fff;}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}

/* 页脚 */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:0;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.foot-brand .brand-mark{width:36px;height:36px;font-size:18px;border-radius:10px;}
.foot-brand strong{color:#fff;font-size:17px;font-weight:800;}
.site-footer p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.6);margin:0;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.02em;}
.foot-links{display:grid;gap:11px;}
.foot-links a{color:rgba(255,255,255,.68);font-size:14.5px;transition:color var(--t),transform var(--t);}
.foot-links a:hover{color:var(--c-primary);transform:translateX(3px);}
.foot-contact{display:grid;gap:14px;}
.foot-contact li{display:flex;gap:11px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.62);}
.foot-contact i{color:var(--c-primary);margin-top:5px;font-size:13px;}
.foot-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* 动效 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* 响应式 */
@media (max-width:1180px){
  .main-nav{display:none;}
  .nav-toggle{display:block;}
  .nav-mega{display:none;}
  .head-actions .btn-sm{display:none;}
  .logo-strip{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:1024px){
  .section{padding:76px 0;}
  .alt-row{grid-template-columns:1fr;gap:28px;padding:30px 0;}
  .alt-row.reverse .alt-text,.alt-row.reverse .alt-media{order:0;}
  .cta-inner{grid-template-columns:1fr;gap:26px;}
  .cta-actions{justify-content:flex-start;}
  .cta-band{padding:48px 32px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .cat-hero{padding:52px 0 46px;}
  .section{padding:60px 0;}
  .section-tight{padding:52px 0;}
  .sec-head{margin-bottom:34px;}
  .card{padding:22px;}
  .logo-strip{grid-template-columns:repeat(2,1fr);}
  .foot-grid{grid-template-columns:1fr;}
  .cta-band{padding:40px 24px;border-radius:20px;}
  .faq-q{font-size:16.5px;padding:18px 18px;}
  .faq-a-inner{padding:0 18px 20px 18px;font-size:15.5px;}
}
@media (max-width:520px){
  .wrap{padding:0 18px;}
  .head-bar{min-height:66px;}
  .brand-text em{display:none;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .case-metrics{gap:16px;}
  .mini-stats{gap:18px;}
}

/* roulang page: category3 */
:root{
  --brand:#00A88F;
  --brand-dark:#007D6B;
  --brand-soft:#E6F7F3;
  --accent:#FF6B35;
  --accent-dark:#E4551F;
  --ink:#0E1513;
  --graphite:#5B6661;
  --line:#E7EBE6;
  --warm:#F7F8F5;
  --white:#FFFFFF;
  --signal:#F5C542;
  --radius-card:18px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-sm:0 4px 14px rgba(14,21,19,.05);
  --shadow:0 10px 30px rgba(14,21,19,.06);
  --shadow-hover:0 18px 44px rgba(14,21,19,.12);
  --container:1280px;
  --gutter:32px;
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--warm);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-img);}
a{color:var(--brand-dark);text-decoration:none;transition:color .28s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;color:var(--ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:16px;}
:focus-visible{outline:3px solid rgba(0,168,143,.35);outline-offset:2px;border-radius:6px;}

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

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--radius-pill);
  font-size:16px;
  font-weight:800;
  line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .28s ease,background-color .28s ease,box-shadow .28s ease,border-color .28s ease,color .28s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(0,168,143,.24);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,125,107,.3);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(255,107,53,.26);}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:rgba(14,21,19,.18);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-soft);transform:translateY(-2px);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-2px);}
.btn-sm{padding:11px 20px;font-size:15px;}
.btn-block{width:100%;justify-content:center;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,248,245,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease,background-color .3s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(14,21,19,.08);background:rgba(255,255,255,.97);}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  min-height:74px;
}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;font-weight:900;font-size:19px;
  box-shadow:0 6px 16px rgba(0,168,143,.28);
}
.brand-text{font-size:18px;font-weight:900;color:var(--ink);letter-spacing:-.01em;}
.brand:hover .brand-text{color:var(--brand-dark);}

.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:10px 15px;
  font-size:15.5px;
  font-weight:700;
  color:var(--graphite);
  border-radius:10px;
  transition:color .26s ease,background-color .26s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:15px;right:15px;bottom:4px;
  height:2px;
  background:var(--brand);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s ease;
}
.nav-link:hover{color:var(--brand-dark);background:var(--brand-soft);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand-dark);background:var(--brand-soft);}
.nav-link.is-active::after{transform:scaleX(1);background:var(--accent);}

.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;
  font-size:15px;font-weight:800;
  color:var(--ink);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  cursor:pointer;
  transition:border-color .26s ease,color .26s ease,box-shadow .26s ease;
}
.mega-trigger:hover{border-color:var(--brand);color:var(--brand-dark);box-shadow:var(--shadow-sm);}
.mega-trigger i{font-size:12px;transition:transform .3s ease;}
.mega-wrap.is-open .mega-trigger{border-color:var(--brand);color:var(--brand-dark);}
.mega-wrap.is-open .mega-trigger i{transform:rotate(180deg);}

.mega-panel{
  position:absolute;
  top:calc(100% + 14px);
  right:0;
  width:640px;
  max-width:88vw;
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:0 26px 60px rgba(14,21,19,.16);
  padding:24px;
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:22px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
}
.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col-title{font-size:13px;font-weight:800;letter-spacing:.08em;color:var(--graphite);margin-bottom:12px;text-transform:uppercase;}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
.mega-links a{
  display:block;
  padding:10px 12px;
  border-radius:12px;
  font-size:14.5px;
  font-weight:700;
  color:var(--ink);
  background:var(--warm);
  transition:background-color .26s ease,color .26s ease,transform .26s ease;
}
.mega-links a:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateX(3px);}
.mega-recent{display:flex;flex-direction:column;gap:10px;}
.mega-recent a{
  display:block;
  padding:11px 13px;
  border:1px solid var(--line);
  border-radius:12px;
  transition:border-color .26s ease,box-shadow .26s ease,transform .26s ease;
}
.mega-recent a:hover{border-color:rgba(0,168,143,.4);box-shadow:var(--shadow-sm);transform:translateY(-2px);}
.mega-recent strong{display:block;font-size:14.5px;font-weight:800;color:var(--ink);line-height:1.45;margin-bottom:4px;}
.mega-recent span{font-size:12.5px;color:var(--graphite);}
.mega-foot{
  grid-column:1 / -1;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 16px;
  border-radius:14px;
  background:var(--brand-soft);
}
.mega-foot p{font-size:14px;font-weight:700;color:var(--brand-dark);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  background:#fff;
  border-radius:12px;
  cursor:pointer;
  padding:0;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s ease,opacity .3s 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);}

.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:16px var(--gutter) 26px;
}
.mobile-drawer.is-open{display:block;animation:drawerIn .3s ease;}
@keyframes drawerIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:translateY(0);}}
.drawer-group{margin-bottom:14px;}
.drawer-group h4{font-size:12.5px;letter-spacing:.08em;color:var(--graphite);margin-bottom:8px;}
.drawer-links{display:flex;flex-direction:column;gap:8px;}
.drawer-links a{
  display:block;padding:12px 14px;
  border:1px solid var(--line);
  border-radius:12px;
  font-size:15px;font-weight:700;color:var(--ink);
  background:var(--warm);
}
.drawer-links a.is-active{background:var(--brand-soft);color:var(--brand-dark);border-color:rgba(0,168,143,.35);}

/* ============ 内页 Hero ============ */
.page-hero{
  position:relative;
  background-size:cover;
  background-position:center;
  padding:64px 0 72px;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,18,16,.92) 0%,rgba(10,18,16,.78) 46%,rgba(0,125,107,.62) 100%);
}
.page-hero .wrap{position:relative;z-index:2;}
.crumb{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:20px;flex-wrap:wrap;}
.crumb a{color:rgba(255,255,255,.86);font-weight:700;}
.crumb a:hover{color:#fff;}
.crumb i{font-size:10px;color:rgba(255,255,255,.5);}
.page-hero h1{
  color:#fff;
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.14;
  max-width:900px;
  margin-bottom:16px;
}
.page-hero .hero-sub{
  color:rgba(255,255,255,.82);
  font-size:17px;
  max-width:720px;
  line-height:1.8;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-tags span{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 15px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.24);
  color:#fff;
  font-size:13.5px;
  font-weight:700;
}
.hero-tags i{color:var(--signal);font-size:12px;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section--tight{padding:76px 0;}
.section--warm{background:var(--warm);}
.section--white{background:#fff;}
.section--ink{background:var(--ink);}
.sec-head{max-width:760px;margin-bottom:48px;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:800;letter-spacing:.1em;
  color:var(--brand-dark);
  background:var(--brand-soft);
  padding:7px 15px;
  border-radius:var(--radius-pill);
  margin-bottom:18px;
  text-transform:uppercase;
}
.sec-kicker.on-dark{background:rgba(0,168,143,.18);color:#7FE3D2;}
.sec-head h2{font-size:clamp(28px,3.4vw,44px);line-height:1.16;margin-bottom:16px;}
.sec-head p{color:var(--graphite);font-size:17px;}
.section--ink .sec-head h2{color:#fff;}
.section--ink .sec-head p{color:rgba(255,255,255,.72);}
.section--ink .sec-head{color:#fff;}

/* ============ 信任要点 ============ */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.trust-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.trust-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,168,143,.32);}
.trust-card:nth-child(2){margin-top:22px;}
.trust-card:nth-child(4){margin-top:22px;}
.trust-num{
  font-size:34px;
  font-weight:900;
  color:var(--brand);
  line-height:1.1;
  letter-spacing:-.03em;
  font-family:var(--mono);
  margin-bottom:10px;
}
.trust-card h3{font-size:18px;margin-bottom:8px;}
.trust-card p{font-size:14.5px;color:var(--graphite);line-height:1.75;}

/* ============ 支持渠道 + 步骤条 ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:56px;}
.channel-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 26px;
  box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;gap:12px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,168,143,.32);}
.channel-icon{
  width:46px;height:46px;border-radius:13px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:19px;
}
.channel-card h3{font-size:19px;}
.channel-card p{font-size:15px;color:var(--graphite);line-height:1.78;}
.channel-meta{
  margin-top:auto;
  padding-top:14px;
  border-top:1px dashed var(--line);
  font-size:13.5px;
  color:var(--graphite);
  display:flex;align-items:center;gap:8px;
}
.channel-meta i{color:var(--accent);}

.step-head{margin-bottom:28px;}
.step-head h3{font-size:clamp(22px,2.4vw,28px);margin-bottom:10px;}
.step-head p{color:var(--graphite);font-size:16px;}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.step{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:26px 22px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.step-idx{
  display:inline-block;
  font-family:var(--mono);
  font-size:13px;
  font-weight:800;
  color:var(--brand-dark);
  background:var(--brand-soft);
  padding:4px 11px;
  border-radius:8px;
  margin-bottom:14px;
}
.step h4{font-size:17px;margin-bottom:8px;font-weight:800;}
.step p{font-size:14.5px;color:var(--graphite);line-height:1.75;}
.step::after{
  content:"";
  position:absolute;
  top:42px;right:-14px;
  width:14px;height:2px;
  background:var(--line);
}
.step:last-child::after{display:none;}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  padding:32px 28px;
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  gap:16px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.price-card.is-featured{
  border-color:rgba(0,168,143,.5);
  box-shadow:0 24px 54px rgba(0,168,143,.16);
  transform:translateY(-14px);
  position:relative;
}
.price-card.is-featured:hover{transform:translateY(-18px);}
.price-badge{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:var(--accent);color:#fff;
  font-size:13px;font-weight:800;
  padding:6px 16px;border-radius:var(--radius-pill);
  white-space:nowrap;
}
.price-tier{font-size:19px;font-weight:800;}
.price-target{font-size:13.5px;color:var(--graphite);}
.price-num{display:flex;align-items:baseline;gap:6px;font-family:var(--mono);}
.price-num strong{font-size:42px;font-weight:900;letter-spacing:-.03em;color:var(--ink);line-height:1;}
.price-num span{font-size:14px;color:var(--graphite);}
.price-feats{display:flex;flex-direction:column;gap:11px;margin-top:4px;}
.price-feats li{display:flex;gap:10px;font-size:14.8px;color:var(--graphite);line-height:1.7;}
.price-feats i{color:var(--brand);font-size:14px;margin-top:5px;}
.price-feats li.muted i{color:#B9C1BC;}
.price-note{font-size:13px;color:var(--graphite);padding-top:6px;}

.table-wrap{
  margin-top:56px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow);
  overflow-x:auto;
}
table.compare{width:100%;border-collapse:collapse;min-width:720px;}
table.compare caption{
  text-align:left;
  padding:22px 26px 6px;
  font-size:18px;
  font-weight:800;
  color:var(--ink);
}
table.compare th,table.compare td{
  padding:16px 22px;
  text-align:left;
  font-size:15px;
  border-bottom:1px solid var(--line);
  color:var(--graphite);
  vertical-align:middle;
}
table.compare thead th{
  font-weight:800;
  color:var(--ink);
  background:var(--warm);
  font-size:14.5px;
  white-space:nowrap;
}
table.compare tbody th{font-weight:700;color:var(--ink);background:#fff;}
table.compare tbody tr:hover td,table.compare tbody tr:hover th{background:var(--brand-soft);}
table.compare td i.yes{color:var(--brand);}
table.compare td i.no{color:#B9C1BC;}
table.compare tbody tr:last-child th,table.compare tbody tr:last-child td{border-bottom:none;}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:border-color .3s ease,box-shadow .3s ease;
}
.faq-item.is-open{border-color:rgba(0,168,143,.4);box-shadow:var(--shadow);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 24px;
  background:none;border:none;cursor:pointer;
  text-align:left;
  font-size:17.5px;
  font-weight:800;
  color:var(--ink);
  position:relative;
  transition:color .26s ease;
}
.faq-q::before{
  content:"";
  position:absolute;left:0;top:14px;bottom:14px;
  width:3px;border-radius:3px;
  background:var(--brand);
  transform:scaleY(0);
  transition:transform .3s ease;
}
.faq-item.is-open .faq-q::before{transform:scaleY(1);}
.faq-q:hover{color:var(--brand-dark);}
.faq-icon{
  flex:0 0 30px;width:30px;height:30px;
  border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);
  color:var(--brand-dark);
  font-size:13px;
  transition:transform .3s ease,background-color .3s ease,color .3s ease;
}
.faq-item.is-open .faq-icon{background:var(--brand);color:#fff;transform:rotate(135deg);}
.faq-a{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .34s ease;
}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a > div{overflow:hidden;}
.faq-a p{
  padding:0 24px 24px 27px;
  font-size:16px;
  line-height:1.85;
  color:var(--graphite);
}

/* ============ 表单 ============ */
.contact-shell{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:34px;
  align-items:start;
}
.contact-aside{
  background:var(--ink);
  border-radius:20px;
  padding:34px 30px;
  color:#fff;
  box-shadow:var(--shadow);
}
.contact-aside h3{color:#fff;font-size:22px;margin-bottom:14px;}
.contact-aside p{color:rgba(255,255,255,.74);font-size:15.5px;line-height:1.85;}
.aside-list{margin-top:24px;display:flex;flex-direction:column;gap:14px;}
.aside-list li{display:flex;gap:12px;font-size:15px;color:rgba(255,255,255,.86);line-height:1.7;}
.aside-list i{color:var(--brand);margin-top:5px;}
.aside-note{
  margin-top:26px;
  padding:14px 16px;
  border-radius:14px;
  background:rgba(0,168,143,.16);
  border:1px solid rgba(0,168,143,.3);
  font-size:14px;
  color:#9FEFE0;
  display:flex;gap:10px;
}
.contact-form{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  padding:32px 30px;
  box-shadow:var(--shadow);
}
.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:14px;font-weight:800;color:var(--ink);}
.field label span{color:var(--accent);}
.field input,.field select,.field textarea{
  width:100%;
  height:52px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--warm);
  color:var(--ink);
  transition:border-color .26s ease,box-shadow .26s ease,background-color .26s ease;
}
.field textarea{height:auto;padding:14px 16px;min-height:132px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--brand);
  background:#fff;
  box-shadow:0 0 0 3px rgba(0,168,143,.16);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,107,53,.14);}
.field .err{font-size:13px;color:var(--accent-dark);display:none;}
.field.has-error .err{display:block;}
.field .hint{font-size:13px;color:var(--graphite);}
.form-consent{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--graphite);line-height:1.7;}
.form-consent input{width:18px;height:18px;margin-top:3px;flex:0 0 18px;accent-color:var(--brand);}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px;}
.form-status{
  display:none;
  margin-top:16px;
  padding:14px 16px;
  border-radius:12px;
  font-size:14.5px;
  font-weight:700;
}
.form-status.is-ok{display:block;background:var(--brand-soft);color:var(--brand-dark);border:1px solid rgba(0,168,143,.3);}
.form-status.is-err{display:block;background:#FFF1EA;color:var(--accent-dark);border:1px solid rgba(255,107,53,.3);}

/* ============ 底部 CTA ============ */
.bottom-cta{
  background:linear-gradient(120deg,var(--ink) 0%,#123028 55%,var(--brand-dark) 100%);
  border-radius:24px;
  padding:58px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  flex-wrap:wrap;
  box-shadow:0 30px 70px rgba(14,21,19,.24);
}
.bottom-cta h2{color:#fff;font-size:clamp(26px,3vw,38px);line-height:1.2;margin-bottom:12px;max-width:640px;}
.bottom-cta p{color:rgba(255,255,255,.76);font-size:16.5px;max-width:600px;}
.bottom-cta .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#fff;padding:72px 0 30px;margin-top:0;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.foot-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:17px;border-radius:10px;}
.foot-brand strong{font-size:17.5px;font-weight:900;color:#fff;}
.site-footer p{color:rgba(255,255,255,.66);font-size:14.5px;line-height:1.85;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:800;letter-spacing:.02em;}
.foot-links{display:flex;flex-direction:column;gap:11px;}
.foot-links a{color:rgba(255,255,255,.68);font-size:14.5px;transition:color .26s ease,padding-left .26s ease;}
.foot-links a:hover{color:var(--brand);padding-left:4px;}
.foot-contact{display:flex;flex-direction:column;gap:12px;}
.foot-contact li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.68);line-height:1.7;}
.foot-contact i{color:var(--brand);margin-top:5px;font-size:14px;}
.foot-bottom{
  margin-top:52px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;
  color:rgba(255,255,255,.52);
}

/* ============ 滚动动效 ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .header-actions .btn-primary{display:none;}
  .mega-panel{width:520px;}
}
@media (max-width:1024px){
  :root{--gutter:24px;}
  .section{padding:76px 0;}
  .section--tight{padding:62px 0;}
  .trust-grid{grid-template-columns:repeat(2,1fr);}
  .trust-card:nth-child(2),.trust-card:nth-child(4){margin-top:0;}
  .channel-grid{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;}
  .step::after{display:none;}
  .price-grid{grid-template-columns:1fr;max-width:560px;}
  .price-card.is-featured{transform:none;}
  .price-card.is-featured:hover{transform:translateY(-4px);}
  .contact-shell{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .page-hero{padding:48px 0 54px;}
  .channel-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .bottom-cta{padding:38px 26px;border-radius:20px;}
  .contact-aside,.contact-form{padding:26px 22px;}
  .mega-panel{display:none;}
  .mega-wrap{display:none;}
}
@media (max-width:520px){
  :root{--gutter:20px;}
  .section{padding:56px 0;}
  .trust-grid{grid-template-columns:1fr;}
  .brand-text{font-size:16px;}
  .foot-grid{grid-template-columns:1fr;}
  .faq-q{font-size:16px;padding:18px 18px;}
  .faq-a p{padding:0 18px 20px 21px;font-size:15.5px;}
  .btn{padding:13px 22px;font-size:15px;}
  .price-num strong{font-size:36px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}