/* roulang page: index */
:root{
  --bg-primary:#070D1A;
  --bg-secondary:#0B1322;
  --bg-tertiary:#0E1A2F;
  --bg-deep:#050A14;
  --glass-bg:rgba(255,255,255,0.05);
  --glass-bg-hover:rgba(255,255,255,0.08);
  --glass-border:rgba(255,255,255,0.12);
  --glass-highlight:rgba(255,255,255,0.06);
  --blue-primary:#2E6BFF;
  --blue-light:#4C8DFF;
  --blue-glow:rgba(46,107,255,0.45);
  --gold:#D9A85C;
  --gold-dark:#C8934A;
  --gold-glow:rgba(217,168,92,0.25);
  --text-primary:#E8EEF7;
  --text-secondary:#9AA9C0;
  --text-muted:#64748B;
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --radius-xl:24px;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow-card:0 12px 32px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-hover:0 16px 48px rgba(0,0,0,.55), 0 0 24px rgba(46,107,255,.2);
  --shadow-btn:0 0 24px rgba(46,107,255,.45);
  --transition:all .3s cubic-bezier(.4,0,.2,1);
  --container-max:1240px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.75;
  color:var(--text-primary);
  background:var(--bg-primary);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none;transition:var(--transition)}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:var(--container-max);margin:0 auto;padding:0 24px}
.section{padding:96px 0;position:relative}
.section-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;letter-spacing:.05em;
  color:var(--gold);background:rgba(217,168,92,.1);
  border:1px solid rgba(217,168,92,.25);
  padding:6px 16px;border-radius:999px;margin-bottom:20px;
}
.section-title{font-size:34px;font-weight:800;line-height:1.3;color:var(--text-primary);margin-bottom:16px;letter-spacing:-.01em}
.section-desc{font-size:16px;color:var(--text-secondary);line-height:1.75;max-width:720px;margin-bottom:48px}
.text-gold{color:var(--gold)}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:999px;font-size:15px;font-weight:600;
  transition:var(--transition);line-height:1.4;white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue-primary),var(--blue-light));
  color:#fff;box-shadow:var(--shadow-btn);border:1px solid rgba(76,141,255,.3);
}
.btn-primary:hover{
  box-shadow:0 0 32px rgba(46,107,255,.65), 0 4px 16px rgba(217,168,92,.25);
  transform:translateY(-2px);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 16px rgba(46,107,255,.4)}
.btn-primary:focus-visible{outline:2px solid var(--blue-light);outline-offset:2px}
.btn-secondary{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.15);
  color:var(--text-primary);
  backdrop-filter:blur(8px);
}
.btn-secondary:hover{
  border-color:rgba(76,141,255,.5);
  background:rgba(255,255,255,.1);
  color:var(--blue-light);
}
.btn-secondary:active{transform:translateY(0)}
.btn-secondary:focus-visible{outline:2px solid var(--blue-light);outline-offset:2px}
.btn-large{padding:16px 42px;font-size:16px}
.btn-block{width:100%}

/* Header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(7,13,26,.82);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:var(--transition);
}
.site-header.scrolled{background:rgba(7,13,26,.95)}
.header-brand-row{border-bottom:1px solid rgba(255,255,255,.04)}
.header-brand-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.brand-logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-icon{
  width:44px;height:44px;border-radius:14px;
  background:linear-gradient(135deg,rgba(46,107,255,.2),rgba(217,168,92,.15));
  border:1px solid rgba(76,141,255,.3);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 20px rgba(46,107,255,.15);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:18px;font-weight:800;color:var(--text-primary);letter-spacing:.01em}
.brand-tagline{font-size:12px;color:var(--text-muted);letter-spacing:.08em}
.brand-contact{display:flex;align-items:center;gap:16px}
.brand-phone{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-secondary)}
.brand-phone i{color:var(--gold)}
.header-nav-row{background:rgba(11,19,34,.6)}
.main-nav{display:flex;align-items:center;gap:4px;padding:0}
.nav-item{
  display:inline-flex;align-items:center;padding:12px 20px;
  font-size:14px;font-weight:500;color:var(--text-secondary);
  border-radius:10px 10px 0 0;position:relative;transition:var(--transition);
}
.nav-item:hover{color:var(--text-primary);background:rgba(255,255,255,.04)}
.nav-item.active{
  color:var(--blue-light);font-weight:600;
  background:rgba(46,107,255,.08);
}
.nav-item.active::after{
  content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:24px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--blue-primary),var(--blue-light));
  box-shadow:0 0 12px rgba(76,141,255,.5);
}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.12);align-items:center;justify-content:center;background:rgba(255,255,255,.05)}

/* Mobile Menu */
.mobile-menu{
  display:none;position:fixed;top:0;right:0;bottom:0;width:300px;
  background:rgba(7,13,26,.98);backdrop-filter:blur(20px);
  z-index:999;padding:80px 32px 32px;flex-direction:column;gap:8px;
  border-left:1px solid rgba(255,255,255,.08);
  transform:translateX(100%);transition:transform .35s cubic-bezier(.4,0,.2,1);
}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu a{
  display:block;padding:14px 16px;border-radius:12px;font-size:16px;color:var(--text-secondary);
}
.mobile-menu a:hover,.mobile-menu a.active{background:rgba(46,107,255,.1);color:var(--blue-light)}
.mobile-menu .menu-close{
  position:absolute;top:16px;right:16px;width:40px;height:40px;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);font-size:18px;color:var(--text-secondary);
}
.mobile-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:998;backdrop-filter:blur(4px)}

/* Hero */
.hero{
  position:relative;min-height:680px;display:flex;align-items:center;
  padding:80px 0 64px;
  background:url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,13,26,.92) 0%,rgba(7,13,26,.82) 50%,rgba(7,13,26,.65) 100%);
}
.hero::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:120px;
  background:linear-gradient(transparent,var(--bg-primary));
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(10px);
  padding:8px 20px;border-radius:999px;font-size:13px;color:var(--gold);
  margin-bottom:28px;
}
.hero-badge::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 8px var(--gold)}
.hero-title{
  font-size:50px;font-weight:900;line-height:1.2;letter-spacing:-.02em;
  margin-bottom:24px;
}
.hero-title .accent{
  background:linear-gradient(120deg,var(--blue-light),var(--gold));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-desc{font-size:17px;line-height:1.85;color:var(--text-secondary);margin-bottom:36px;max-width:540px}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:40px}
.hero-metrics{display:flex;gap:32px;flex-wrap:wrap}
.hero-metric{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-secondary)}
.hero-metric i{color:var(--gold);font-size:18px}
.hero-side-card{
  background:rgba(11,19,34,.72);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-xl);
  backdrop-filter:blur(18px);
  box-shadow:var(--shadow-card);
  padding:32px;
  position:relative;
  overflow:hidden;
}
.hero-side-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--blue-primary),var(--gold));
  opacity:.6;
}
.hero-side-card .card-label{
  font-size:13px;color:var(--gold);letter-spacing:.06em;margin-bottom:16px;
  display:flex;align-items:center;gap:8px;
}
.hero-side-card .card-label::after{content:'';flex:1;height:1px;background:rgba(255,255,255,.08)}
.hero-side-card h3{font-size:22px;font-weight:700;margin-bottom:6px}
.hero-side-card .sub{font-size:14px;color:var(--text-muted);margin-bottom:20px}
.info-row{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.info-row:last-child{border-bottom:none}
.info-row i{color:var(--blue-light);font-size:18px;margin-top:2px;flex-shrink:0}
.info-row .info-label{font-size:13px;color:var(--text-muted);display:block}
.info-row .info-value{font-size:14px;color:var(--text-primary);font-weight:500}

/* Pain Points */
.pain-section{background:var(--bg-secondary)}
.pain-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:flex-start}
.pain-list{display:flex;flex-direction:column;gap:20px}
.pain-card{
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);padding:24px;
  box-shadow:var(--shadow-card);transition:var(--transition);
  display:flex;gap:16px;align-items:flex-start;
}
.pain-card:nth-child(2){transform:translateX(24px)}
.pain-card:hover{
  background:var(--glass-bg-hover);
  border-color:rgba(76,141,255,.3);
  box-shadow:var(--shadow-hover);
  transform:translateX(24px) translateY(-4px);
}
.pain-card:nth-child(1):hover{transform:translateY(-4px)}
.pain-icon{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(46,107,255,.1);border:1px solid rgba(76,141,255,.2);
  color:var(--blue-light);font-size:18px;
}
.pain-card p{font-size:15px;line-height:1.7;color:var(--text-secondary)}

/* Solution */
.solution-section{background:var(--bg-primary);position:relative;overflow:hidden}
.solution-section::before{
  content:'';position:absolute;top:0;right:0;width:500px;height:500px;
  background:radial-gradient(circle,rgba(46,107,255,.08),transparent 70%);
  pointer-events:none;
}
.solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.solution-main-card{
  grid-column:1/-1;background:var(--glass-bg);
  border:1px solid var(--glass-border);border-radius:var(--radius-xl);
  overflow:hidden;display:grid;grid-template-columns:1fr 1fr;
  box-shadow:var(--shadow-card);transition:var(--transition);
}
.solution-main-card:hover{box-shadow:var(--shadow-hover);border-color:rgba(76,141,255,.25)}
.solution-main-card img{height:100%;min-height:320px;object-fit:cover}
.solution-main-content{padding:40px;display:flex;flex-direction:column;justify-content:center}
.solution-main-content .num{
  font-size:14px;font-weight:700;color:var(--gold);letter-spacing:.05em;margin-bottom:12px;
}
.solution-main-content h3{font-size:26px;font-weight:800;line-height:1.35;margin-bottom:16px}
.solution-main-content p{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:20px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--blue-light);font-size:14px;font-weight:600;
}
.text-link:hover{gap:10px;color:var(--gold)}
.text-link i{transition:transform .3s}
.solution-cards{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.solution-card{
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);padding:32px 28px;
  box-shadow:var(--shadow-card);transition:var(--transition);
  position:relative;overflow:hidden;
}
.solution-card:nth-child(2){transform:translateY(16px)}
.solution-card:hover{
  background:var(--glass-bg-hover);border-color:rgba(76,141,255,.3);
  box-shadow:var(--shadow-hover);transform:translateY(12px);
}
.solution-card:nth-child(1):hover{transform:translateY(-4px)}
.solution-card:nth-child(3):hover{transform:translateY(-4px)}
.solution-card .card-num{
  font-size:40px;font-weight:900;color:rgba(255,255,255,.04);
  position:absolute;top:16px;right:20px;line-height:1;
}
.solution-card .icon{
  width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(46,107,255,.15),rgba(217,168,92,.1));
  border:1px solid rgba(76,141,255,.2);
  color:var(--blue-light);font-size:20px;margin-bottom:18px;
}
.solution-card h4{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--text-primary)}
.solution-card p{font-size:14px;color:var(--text-secondary);line-height:1.7}

/* Results */
.results-section{background:var(--bg-secondary);position:relative;overflow:hidden}
.results-section::before{
  content:'';position:absolute;bottom:0;left:0;width:400px;height:400px;
  background:radial-gradient(circle,rgba(217,168,92,.05),transparent 70%);
  pointer-events:none;
}
.results-panel{
  background:rgba(11,19,34,.6);
  border:1px solid rgba(76,141,255,.15);
  border-radius:var(--radius-xl);
  padding:56px 48px 48px;
  box-shadow:var(--shadow-card);
  position:relative;
}
.results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-bottom:32px}
.result-item{text-align:center;padding:16px 8px;position:relative}
.result-item:not(:last-child)::after{
  content:'';position:absolute;right:-16px;top:20%;height:60%;width:1px;
  background:rgba(255,255,255,.06);
}
.result-number{
  font-size:44px;font-weight:900;color:var(--gold);
  line-height:1.1;margin-bottom:8px;
  text-shadow:0 0 24px rgba(217,168,92,.25);
}
.result-unit{font-size:18px;font-weight:600;color:var(--gold)}
.result-label{font-size:14px;color:var(--text-secondary)}
.results-note{
  text-align:center;font-size:15px;color:var(--text-secondary);
  line-height:1.8;max-width:680px;margin:0 auto;padding-top:8px;
  border-top:1px solid rgba(255,255,255,.06);
}

/* Testimonials */
.testimonials-section{background:var(--bg-primary)}
.testimonials-grid{
  display:grid;grid-template-columns:1fr 1fr 1fr;
  gap:28px;align-items:start;
}
.testimonial-card{
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);padding:32px;position:relative;
  box-shadow:var(--shadow-card);transition:var(--transition);
}
.testimonial-card:nth-child(2){transform:translateY(24px)}
.testimonial-card:nth-child(3){transform:translateY(8px)}
.testimonial-card:hover{
  background:var(--glass-bg-hover);border-color:rgba(76,141,255,.25);
  box-shadow:var(--shadow-hover);
}
.testimonial-card:nth-child(2):hover{transform:translateY(20px)}
.testimonial-card:nth-child(3):hover{transform:translateY(4px)}
.testimonial-card .quote-mark{
  font-size:56px;font-weight:900;color:rgba(217,168,92,.15);
  font-family:Georgia,serif;line-height:1;position:absolute;top:16px;right:24px;
}
.testimonial-card .stars{
  display:flex;gap:3px;color:var(--gold);font-size:14px;margin-bottom:16px;
}
.testimonial-card .content{
  font-size:15px;line-height:1.75;color:var(--text-secondary);margin-bottom:20px;
  position:relative;z-index:1;
}
.testimonial-author{
  display:flex;align-items:center;gap:12px;
  border-top:1px solid rgba(255,255,255,.05);padding-top:16px;
}
.testimonial-author .avatar{
  width:38px;height:38px;border-radius:50%;
  background:linear-gradient(135deg,rgba(46,107,255,.3),rgba(217,168,92,.2));
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--text-primary);
  border:1px solid rgba(255,255,255,.1);
}
.testimonial-author .name{font-size:14px;font-weight:600;color:var(--text-primary)}
.testimonial-author .role{font-size:12px;color:var(--text-muted)}

/* Info List (资讯区) */
.info-section{background:var(--bg-secondary)}
.info-grid{display:grid;grid-template-columns:1fr .85fr;gap:48px;align-items:start}
.info-list-wrap{display:flex;flex-direction:column;gap:16px}
.info-list-item{
  display:flex;align-items:center;gap:16px;
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-md);padding:18px 20px;
  transition:var(--transition);
}
.info-list-item:hover{
  background:var(--glass-bg-hover);border-color:rgba(76,141,255,.3);
  transform:translateX(6px);box-shadow:var(--shadow-hover);
}
.info-list-item .dot{
  width:8px;height:8px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--blue-primary),var(--gold));
  box-shadow:0 0 8px rgba(46,107,255,.4);
}
.info-list-item .title{font-size:15px;color:var(--text-primary);font-weight:500;flex:1}
.info-list-item .meta{font-size:12px;color:var(--text-muted);flex-shrink:0}
.info-recommend{
  background:rgba(11,19,34,.6);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-xl);padding:32px;
  box-shadow:var(--shadow-card);
}
.info-recommend h3{
  font-size:18px;font-weight:700;margin-bottom:20px;
  display:flex;align-items:center;gap:10px;
}
.info-recommend h3::before{
  content:'';width:4px;height:20px;border-radius:2px;
  background:linear-gradient(180deg,var(--blue-primary),var(--gold));
}
.recommend-card{
  display:flex;align-items:center;gap:14px;padding:12px;
  border-radius:var(--radius-sm);transition:var(--transition);
}
.recommend-card:hover{background:rgba(255,255,255,.04)}
.recommend-card img{
  width:72px;height:54px;border-radius:8px;object-fit:cover;flex-shrink:0;
}
.recommend-card .title{font-size:13px;color:var(--text-secondary);line-height:1.55}
.recommend-card .title:hover{color:var(--blue-light)}
.recommend-card .count{font-size:12px;color:var(--text-muted);margin-top:2px}

/* FAQ */
.faq-section{background:var(--bg-primary)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-md);margin-bottom:12px;
  overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:rgba(76,141,255,.25)}
.faq-item.open{border-color:rgba(76,141,255,.4);box-shadow:0 0 20px rgba(46,107,255,.12)}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;cursor:pointer;font-size:16px;font-weight:600;
  color:var(--text-primary);transition:var(--transition);
}
.faq-question:hover{color:var(--blue-light)}
.faq-icon{
  width:28px;height:28px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(46,107,255,.1);border:1px solid rgba(76,141,255,.2);
  color:var(--blue-light);transition:var(--transition);font-size:16px;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(46,107,255,.2);color:var(--blue-light)}
.faq-answer{
  padding:0 24px;max-height:0;overflow:hidden;
  transition:max-height .35s ease;
}
.faq-answer-inner{padding-bottom:20px;font-size:15px;color:var(--text-secondary);line-height:1.75}

/* CTA Section */
.cta-section{
  position:relative;padding:80px 0;
  background:url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
}
.cta-section::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,13,26,.92),rgba(11,19,34,.85));
}
.cta-inner{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:48px;
  background:rgba(11,19,34,.7);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-xl);
  padding:48px 56px;
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}
.cta-content{flex:1}
.cta-content h2{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:12px}
.cta-content p{font-size:15px;color:var(--text-secondary);margin-bottom:16px}
.cta-meta{display:flex;gap:24px;flex-wrap:wrap;margin-top:16px}
.cta-meta span{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted)}
.cta-meta i{color:var(--gold)}
.cta-action{flex-shrink:0;display:flex;flex-direction:column;gap:12px;align-items:center}

/* Footer */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid rgba(255,255,255,.06);
  padding:64px 0 24px;
  position:relative;
  overflow:hidden;
}
.site-footer::before{
  content:'';position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
  opacity:.05;pointer-events:none;
}
.footer-grid{
  position:relative;display:grid;grid-template-columns:1.3fr 1fr 1fr .8fr;
  gap:40px;margin-bottom:48px;
}
.footer-brand .brand-name{font-size:20px;font-weight:800;margin-bottom:8px}
.footer-brand p{font-size:14px;color:var(--text-muted);line-height:1.7;max-width:280px}
.footer-col h4{
  font-size:15px;font-weight:700;margin-bottom:20px;color:var(--text-primary);
  position:relative;padding-bottom:10px;
}
.footer-col h4::after{
  content:'';position:absolute;bottom:0;left:0;width:20px;height:2px;
  background:linear-gradient(90deg,var(--blue-primary),var(--gold));
  border-radius:2px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-secondary);display:inline-flex;align-items:center;gap:6px}
.footer-col a:hover{color:var(--blue-light);padding-left:4px}
.footer-col a i{font-size:12px;color:var(--text-muted)}
.footer-col ul li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-secondary);padding:4px 0}
.footer-col ul li i{color:var(--gold);font-size:15px}
.footer-bottom{
  position:relative;border-top:1px solid rgba(255,255,255,.05);
  padding-top:24px;display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;
}
.footer-bottom .copyright{font-size:13px;color:var(--text-muted)}
.footer-bottom .copyright .brand-mini{color:var(--text-secondary);font-weight:600}
.footer-bottom .tech-info{font-size:12px;color:var(--text-muted)}

/* Back to top */
.to-top{
  position:fixed;bottom:24px;right:24px;width:44px;height:44px;
  border-radius:50%;background:rgba(11,19,34,.9);
  border:1px solid rgba(255,255,255,.15);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-secondary);z-index:99;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:var(--transition);
  backdrop-filter:blur(8px);
}
.to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--blue-light);border-color:var(--blue-light);box-shadow:0 0 16px rgba(46,107,255,.3)}

/* Responsive */
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero-title{font-size:40px}
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero-side-card{max-width:480px}
  .pain-grid{grid-template-columns:1fr;gap:40px}
  .pain-card:nth-child(2),.pain-card:nth-child(2):hover{transform:none}
  .solution-grid{grid-template-columns:1fr}
  .solution-main-card{grid-template-columns:1fr}
  .solution-main-card img{height:240px}
  .solution-cards{grid-template-columns:1fr 1fr}
  .results-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .result-item:nth-child(2)::after{display:none}
  .testimonials-grid{grid-template-columns:1fr;gap:24px}
  .testimonial-card:nth-child(2),.testimonial-card:nth-child(3){transform:none}
  .testimonial-card:nth-child(2):hover,.testimonial-card:nth-child(3):hover{transform:none}
  .info-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;padding:40px 32px;text-align:center}
  .cta-meta{justify-content:center}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .container{padding:0 16px}
  .header-brand-contact .brand-phone,.header-brand-contact .btn{display:none}
  .nav-toggle{display:flex}
  .header-nav-row{display:none}
  .mobile-menu{display:flex}
  .hero{padding:56px 0 48px;min-height:auto}
  .hero-title{font-size:34px}
  .hero-desc{font-size:16px}
  .hero-metrics{gap:20px}
  .solution-cards{grid-template-columns:1fr}
  .solution-card:nth-child(2){transform:none}
  .solution-card:nth-child(2):hover{transform:none}
  .results-panel{padding:32px 24px}
  .results-grid{grid-template-columns:1fr 1fr}
  .result-number{font-size:34px}
  .result-item::after{display:none}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .cta-inner{padding:32px 24px}
  .cta-content h2{font-size:26px}
}
@media (max-width:520px){
  .brand-name{font-size:15px}
  .brand-tagline{font-size:11px}
  .brand-icon{width:36px;height:36px}
  .hero-title{font-size:28px}
  .hero-desc{font-size:15px}
  .btn{padding:12px 24px;font-size:14px}
  .section-title{font-size:26px}
  .section-desc{font-size:15px}
  .results-grid{grid-template-columns:1fr 1fr;gap:16px}
  .result-number{font-size:28px}
  .pain-card{padding:18px;flex-direction:column;gap:12px}
  .info-list-item .meta{display:none}
}

/* Animations */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:translateY(0)}
}
.hero-inner>*{animation:fadeUp .55s ease-out both}
.hero-inner>*:nth-child(1){animation-delay:.05s}
.hero-inner>*:nth-child(2){animation-delay:.15s}

/* roulang page: category1 */
:root {
  --primary: #2E6BFF;
  --primary-light: #4C8DFF;
  --accent: #D9A85C;
  --accent-dark: #C8934A;
  --bg-base: #070D1A;
  --bg-alt: #0E1A2F;
  --bg-deep: #0B1322;
  --bg-card: rgba(255,255,255,0.05);
  --bg-card-hover: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);
  --border-blue: rgba(76,141,255,0.3);
  --text-main: #E8EEF7;
  --text-muted: #9AA9C0;
  --text-dim: #64748B;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 12px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.55), 0 0 24px rgba(46,107,255,0.18);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,26,0) 0%, rgba(7,13,26,0.6) 100%);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-light);
}

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul {
  list-style: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

.section-pad {
  padding: 88px 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 0 24px rgba(46,107,255,0.45);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(46,107,255,0.65), 0 0 16px rgba(217,168,92,0.25);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 16px rgba(46,107,255,0.4);
}

.btn-ghost {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.18);
  color: var(--text-main);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.btn-ghost:active {
  transform: translateY(1px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 42px;
  font-size: 17px;
}

/* ===== 头部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7,13,26,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(7,13,26,0.95);
  box-shadow: 0 8px 32px rgba(0,0,0,0.45);
}

.header-brand-row {
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.header-brand-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 20px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(46,107,255,0.22), rgba(217,168,92,0.16));
  border: 1px solid rgba(76,141,255,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(46,107,255,0.2);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text-main);
}

.brand-tagline {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.brand-contact {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.brand-phone {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.brand-phone i {
  display: flex;
  align-items: center;
  color: var(--primary-light);
}

.brand-phone svg {
  width: 14px;
  height: 14px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.04);
  color: var(--text-main);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.nav-toggle:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
}

.header-nav-row {
  background: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  min-height: 56px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.main-nav::-webkit-scrollbar {
  display: none;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  border: 1px solid transparent;
  transition: var(--transition);
  position: relative;
}

.nav-item:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.08);
}

.nav-item.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(46,107,255,0.28), rgba(76,141,255,0.16));
  border-color: rgba(76,141,255,0.4);
  box-shadow: 0 0 16px rgba(46,107,255,0.2);
}

.nav-item.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  box-shadow: 0 0 8px rgba(76,141,255,0.5);
}

/* ===== 分类页 Hero ===== */
.page-hero {
  padding: 56px 0 72px;
  background: linear-gradient(rgba(7,13,26,0.86), rgba(7,13,26,0.72)),
    url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 30%, rgba(76,141,255,0.12), transparent 60%);
  pointer-events: none;
}

.page-hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb a:hover {
  color: var(--primary-light);
}

.breadcrumb span {
  color: var(--text-dim);
  margin: 0 4px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 22px;
  backdrop-filter: blur(8px);
}

.page-hero-content h1 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--text-main);
  margin-bottom: 18px;
}

.page-hero-content h1 em {
  font-style: normal;
  color: var(--accent);
}

.page-hero-content > p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 30px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero-cta .btn {
  min-height: 44px;
}

.page-hero-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  transform: perspective(1000px) rotateY(-4deg);
  transition: var(--transition);
}

.page-hero-card:hover {
  transform: perspective(1000px) rotateY(-2deg) translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.page-hero-card img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
}

.page-hero-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,26,0.1), rgba(7,13,26,0.6));
  pointer-events: none;
}

.hero-card-info {
  position: absolute;
  left: 16px;
  bottom: 16px;
  right: 16px;
  z-index: 2;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(7,13,26,0.65);
  border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(12px);
}

.hero-card-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.hero-card-info strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
}

/* ===== 子标签栏 ===== */
.sub-tabs {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(14,26,47,0.5);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 130px;
  z-index: 50;
  overflow-x: auto;
  scrollbar-width: none;
}

.sub-tabs::-webkit-scrollbar {
  display: none;
}

.sub-tabs-wrap {
  display: flex;
  gap: 10px;
  padding: 14px 0;
  min-width: max-content;
}

.sub-tab {
  display: inline-flex;
  align-items: center;
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition);
}

.sub-tab:hover {
  color: var(--text-main);
  border-color: rgba(76,141,255,0.35);
  background: rgba(46,107,255,0.1);
}

.sub-tab.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(46,107,255,0.35), rgba(76,141,255,0.2));
  border-color: rgba(76,141,255,0.5);
  box-shadow: 0 0 16px rgba(46,107,255,0.25);
}

/* ===== 板块标题 ===== */
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  color: var(--text-main);
}

.section-head p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ===== 服务卡片区 ===== */
.service-cards {
  background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-alt) 100%);
  position: relative;
}

.service-cards::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(46,107,255,0.08), transparent 60%);
  pointer-events: none;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.service-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: rgba(76,141,255,0.35);
  box-shadow: var(--shadow-hover);
}

.service-card-lg {
  grid-column: span 2;
}

.card-media {
  position: relative;
  overflow: hidden;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .card-media img {
  transform: scale(1.04);
}

.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(7,13,26,0.5) 100%);
  pointer-events: none;
}

.card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(7,13,26,0.7);
  border: 1px solid rgba(217,168,92,0.4);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(8px);
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-main);
}

.service-card-lg .card-body h3 {
  font-size: 22px;
}

.card-body p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 20px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(217,168,92,0.1);
  border: 1px solid rgba(217,168,92,0.25);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
  transition: var(--transition);
}

.card-link:hover {
  color: var(--accent);
  gap: 10px;
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.card-link:hover svg {
  transform: translateX(3px);
}

/* ===== 分类描述区 ===== */
.category-desc {
  background: var(--bg-deep);
  position: relative;
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.category-desc::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
  opacity: 0.05;
  pointer-events: none;
}

.desc-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.4fr;
  gap: 56px;
  align-items: start;
}

.desc-title h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
  position: relative;
  padding-bottom: 20px;
}

.desc-title h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 42px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  box-shadow: 0 0 12px rgba(76,141,255,0.4);
}

.desc-content p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 18px;
  text-align: justify;
}

.desc-content p:last-child {
  margin-bottom: 0;
}

/* ===== 相关推荐区 ===== */
.related {
  background: var(--bg-base);
}

.related .section-title {
  text-align: center;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  margin-bottom: 48px;
  color: var(--text-main);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.related .section-title::before,
.related .section-title::after {
  content: "";
  width: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(217,168,92,0.6));
}

.related .section-title::after {
  background: linear-gradient(90deg, rgba(217,168,92,0.6), transparent);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(76,141,255,0.4);
  box-shadow: var(--shadow-hover);
}

.related-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.related-card:hover img {
  transform: scale(1.05);
}

.related-card-body {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.related-card-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
}

.related-card-body span {
  display: inline-flex;
  align-items: center;
  color: var(--primary-light);
  font-size: 14px;
  flex-shrink: 0;
}

.related-card-body span svg {
  width: 16px;
  height: 16px;
}

/* ===== FAQ ===== */
.faq {
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg-base) 100%);
  border-top: 1px solid rgba(255,255,255,0.04);
}

.faq .section-title {
  text-align: center;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  margin-bottom: 48px;
  color: var(--text-main);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(8px);
}

.faq-item:hover {
  border-color: rgba(76,141,255,0.3);
}

.faq-item.open {
  border-color: rgba(76,141,255,0.5);
  box-shadow: 0 0 24px rgba(46,107,255,0.12);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: var(--transition);
}

.faq-q:hover {
  color: var(--primary-light);
}

.faq-q .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(76,141,255,0.12);
  border: 1px solid rgba(76,141,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

.faq-q .faq-icon svg {
  width: 12px;
  height: 12px;
  stroke: var(--primary-light);
  transition: stroke 0.3s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: rgba(76,141,255,0.25);
  border-color: rgba(76,141,255,0.5);
}

.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
  border-top: 1px solid rgba(255,255,255,0.06);
  margin: 0 0 0 24px;
  padding-top: 16px;
  padding-left: 0;
}

.faq-item.open .faq-a {
  display: block;
  animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== CTA 横条 ===== */
.cta-bar {
  padding: 56px 0;
  background: linear-gradient(rgba(7,13,26,0.88), rgba(7,13,26,0.82)),
    url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
}

.cta-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(46,107,255,0.08), transparent 50%);
  pointer-events: none;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-text h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 8px;
}

.cta-text p {
  color: var(--text-muted);
  font-size: 15px;
}

.cta-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.cta-note {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 72px 0 0;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
  opacity: 0.04;
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 0.8fr;
  gap: 48px;
  padding-bottom: 56px;
  position: relative;
  z-index: 1;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 8px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}

.footer-col ul {
  flex-direction: column;
  gap: 10px;
}

.footer-col li {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-col a {
  color: var(--text-muted);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col a i {
  font-style: normal;
  color: var(--primary-light);
  font-weight: 700;
  transition: transform 0.3s ease;
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-col a:hover i {
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.copyright {
  font-size: 13px;
  color: var(--text-dim);
}

.brand-mini {
  font-weight: 700;
  color: var(--text-muted);
}

.tech-info {
  font-size: 12px;
  color: rgba(100,116,139,0.6);
  letter-spacing: 0.08em;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-card-lg {
    grid-column: span 2;
  }

  .page-hero-inner {
    gap: 32px;
  }

  .desc-grid {
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .section-pad {
    padding: 64px 0;
  }

  .site-header {
    position: relative;
  }

  .header-brand-inner {
    height: 64px;
  }

  .brand-name {
    font-size: 15px;
  }

  .brand-tagline {
    font-size: 11px;
  }

  .brand-contact .btn-sm {
    display: none;
  }

  .brand-phone {
    font-size: 13px;
  }

  .brand-phone span {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header-nav-row {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(7,13,26,0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 24px 48px rgba(0,0,0,0.5);
  }

  .site-header.nav-open .header-nav-row {
    display: block;
  }

  .main-nav {
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    gap: 8px;
    overflow: visible;
    min-height: auto;
  }

  .nav-item {
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 15px;
  }

  .nav-item.active::after {
    display: none;
  }

  .nav-item.active {
    background: linear-gradient(135deg, rgba(46,107,255,0.3), rgba(76,141,255,0.15));
  }

  .sub-tabs {
    top: 0;
    position: sticky;
  }

  .page-hero {
    padding: 40px 0 48px;
  }

  .page-hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .page-hero-card {
    transform: none;
    max-width: 480px;
  }

  .page-hero-card:hover {
    transform: translateY(-4px);
  }

  .page-hero-card img {
    min-height: 220px;
    height: 260px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-card-lg {
    grid-column: span 1;
  }

  .desc-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .cta-actions {
    width: 100%;
  }

  .cta-actions .btn {
    flex: 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  body {
    font-size: 15px;
  }

  .section-pad {
    padding: 52px 0;
  }

  .brand-logo {
    gap: 8px;
  }

  .brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }

  .brand-icon svg {
    width: 18px;
    height: 18px;
  }

  .brand-name {
    font-size: 13.5px;
  }

  .page-hero-content h1 {
    font-size: 30px;
  }

  .page-hero-content > p {
    font-size: 15px;
  }

  .card-body {
    padding: 20px;
  }

  .card-body h3 {
    font-size: 18px;
  }

  .service-card-lg .card-body h3 {
    font-size: 19px;
  }

  .faq-q {
    padding: 16px 18px;
    font-size: 15px;
  }

  .faq-a {
    font-size: 14px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-note {
    text-align: center;
  }

  .page-hero-card img {
    height: 220px;
  }
}