/* roulang page: index */
:root{
  --color-primary:#2F6D8F;
  --color-primary-deep:#1F4A6A;
  --color-primary-soft:#EAF3F9;
  --color-accent:#B67A4C;
  --color-bg:#FFFFFF;
  --color-bg-soft:#F4F8FC;
  --color-ink:#1E2C3A;
  --color-body:#3E5268;
  --color-muted:#7E93A8;
  --color-line:#E3ECF3;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-card:0 4px 20px rgba(31,62,89,.07);
  --shadow-hover:0 12px 32px rgba(31,62,89,.12);
  --container:1200px;
  --gutter:24px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:1rem;
  line-height:1.75;
  color:var(--color-body);
  background:var(--color-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;border:none;background:none;cursor:pointer}
input,textarea{font-family:inherit;font-size:1rem}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--gutter);
}
section{scroll-margin-top:80px}
.section-head{
  text-align:center;
  margin-bottom:48px;
}
.section-head h2{
  font-size:clamp(1.5rem,2.5vw,2rem);
  font-weight:700;
  color:var(--color-ink);
  line-height:1.3;
  letter-spacing:.01em;
}
.section-head p{
  margin-top:12px;
  font-size:1rem;
  color:var(--color-muted);
  max-width:640px;
  margin-left:auto;
  margin-right:auto;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 24px;
  border-radius:8px;
  font-size:.9375rem;
  font-weight:600;
  line-height:1;
  transition:all .2s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.98)}
.btn:focus-visible{
  outline:2px solid var(--color-primary);
  outline-offset:2px;
}
.btn-primary{
  background:var(--color-primary);
  color:#fff;
}
.btn-primary:hover{
  background:var(--color-primary-deep);
  box-shadow:0 6px 18px rgba(47,109,143,.25);
}
.btn-outline{
  background:transparent;
  color:var(--color-primary);
  border:1px solid var(--color-primary);
}
.btn-outline:hover{
  background:var(--color-primary-soft);
}
.btn-light{
  background:#fff;
  color:var(--color-primary-deep);
}
.btn-light:hover{
  background:var(--color-primary-soft);
}
.btn-block{width:100%}
/* ========== Header ========== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  height:72px;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--color-line);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.125rem;
  font-weight:700;
  color:var(--color-ink);
}
.brand svg{flex-shrink:0}
.nav-links{
  display:flex;
  align-items:center;
  gap:32px;
  margin-left:auto;
}
.nav-links a{
  font-size:.9375rem;
  font-weight:500;
  color:var(--color-body);
  position:relative;
  padding:4px 0;
  transition:color .2s;
}
.nav-links a:hover{color:var(--color-primary)}
.nav-links a.active{
  color:var(--color-primary-deep);
  font-weight:600;
}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:3px;
  border-radius:3px;
  background:var(--color-accent);
}
.header-cta{margin-left:8px}
.nav-toggle{
  display:none;
  width:40px;
  height:40px;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  border-radius:8px;
}
.nav-toggle span{
  width:20px;
  height:2px;
  background:var(--color-ink);
  border-radius:2px;
  transition:all .3s;
}
.nav-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ========== Hero ========== */
.hero{
  position:relative;
  padding:80px 0 72px;
  background:
    radial-gradient(circle at 12% 20%, rgba(234,243,249,.8) 0%, rgba(234,243,249,.2) 45%, rgba(255,255,255,0) 70%),
    linear-gradient(135deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
  overflow:hidden;
}
.hero-inner{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--color-primary-soft);
  border-radius:999px;
  padding:6px 16px;
  font-size:.8125rem;
  font-weight:600;
  color:var(--color-primary-deep);
}
.hero-badge::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--color-accent);
}
.hero-text h1{
  margin-top:20px;
  font-size:clamp(2rem,4.5vw,3rem);
  font-weight:750;
  line-height:1.25;
  color:var(--color-ink);
  letter-spacing:-.01em;
}
.hero-sub{
  margin-top:20px;
  font-size:1.0625rem;
  line-height:1.85;
  color:var(--color-body);
  max-width:520px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  margin-top:32px;
}
.hero-trust{
  margin-top:24px;
  font-size:.8125rem;
  color:var(--color-muted);
}
.hero-media{
  position:relative;
}
.hero-media img{
  width:100%;
  height:auto;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hover);
  object-fit:cover;
  aspect-ratio:5/3.6;
}
.hero-media::after{
  content:"";
  position:absolute;
  inset:auto -18px -18px auto;
  width:120px;
  height:120px;
  background:var(--color-accent);
  opacity:.08;
  border-radius:var(--radius-md);
  z-index:-1;
}
/* ========== Stats ========== */
.stats{
  padding:56px 0;
  background:var(--color-bg);
  border-bottom:1px solid var(--color-line);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.stat-card{
  background:var(--color-bg);
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  padding:32px 20px;
  text-align:center;
  box-shadow:var(--shadow-card);
  transition:transform .25s,box-shadow .25s;
}
.stat-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);
}
.stat-num{
  display:block;
  font-size:2.25rem;
  font-weight:750;
  color:var(--color-primary);
  line-height:1.2;
}
.stat-num .suffix{
  font-size:1.5rem;
  font-weight:700;
}
.stat-label{
  display:block;
  margin-top:8px;
  font-size:.875rem;
  color:var(--color-muted);
}
/* ========== Services ========== */
.services{
  padding:96px 0;
  background:var(--color-bg-soft);
}
.services-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.service-card{
  grid-column:span 4;
  background:var(--color-bg);
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .3s,box-shadow .3s,border-color .3s;
  display:flex;
  flex-direction:column;
}
.service-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);
  border-color:#C9D8E4;
}
.service-card-wide{
  grid-column:span 6;
  flex-direction:row;
  align-items:stretch;
}
.service-card-wide .service-img{
  flex:0 0 46%;
}
.service-card-wide .service-content{
  flex:1;
  padding:28px;
  display:flex;
  flex-direction:column;
}
.service-img{
  overflow:hidden;
  position:relative;
  aspect-ratio:16/9;
}
.service-card-wide .service-img{
  aspect-ratio:auto;
}
.service-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.service-card:hover .service-img img{
  transform:scale(1.04);
}
.service-content{
  padding:24px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.service-tag{
  display:inline-block;
  align-self:flex-start;
  background:var(--color-primary-soft);
  color:var(--color-primary-deep);
  font-size:.8125rem;
  font-weight:600;
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:12px;
}
.service-tag.accent{
  background:#F4E9DF;
  color:var(--color-accent);
}
.service-content h3{
  font-size:1.125rem;
  font-weight:600;
  color:var(--color-ink);
  line-height:1.4;
  margin-bottom:10px;
}
.service-content p{
  font-size:.9375rem;
  color:var(--color-body);
  line-height:1.7;
  margin-bottom:16px;
  flex:1;
}
.service-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:.875rem;
  color:var(--color-muted);
  border-top:1px solid var(--color-line);
  padding-top:14px;
  margin-top:auto;
}
.service-foot a{
  color:var(--color-primary);
  font-weight:600;
  transition:color .2s;
}
.service-foot a:hover{color:var(--color-accent)}
/* ========== Compare ========== */
.compare{
  padding:96px 0;
  background:var(--color-bg);
}
.compare-grid{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  gap:32px;
  align-items:center;
}
.compare-card{
  border-radius:var(--radius-md);
  padding:36px 32px;
}
.compare-old{
  background:var(--color-bg-soft);
  border:1px solid var(--color-line);
}
.compare-new{
  background:var(--color-bg);
  border:1px solid var(--color-primary);
  border-left:4px solid var(--color-primary);
  box-shadow:var(--shadow-card);
}
.compare-card h3{
  font-size:1.25rem;
  font-weight:700;
  color:var(--color-ink);
  margin-bottom:20px;
}
.compare-card ul li{
  position:relative;
  padding:12px 0 12px 24px;
  border-bottom:1px solid var(--color-line);
  font-size:.9375rem;
  line-height:1.65;
}
.compare-card ul li:last-child{
  border-bottom:none;
}
.compare-card ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:20px;
  width:8px;
  height:8px;
  border-radius:50%;
}
.compare-old ul li::before{
  background:var(--color-muted);
}
.compare-new ul li::before{
  background:var(--color-accent);
}
.compare-new .btn{
  margin-top:20px;
}
.vs-badge{
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--color-bg);
  border:1px solid var(--color-line);
  box-shadow:var(--shadow-card);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  font-weight:750;
  color:var(--color-primary);
  flex-shrink:0;
}
/* ========== News ========== */
.news{
  padding:96px 0;
  background:var(--color-bg-soft);
}
.news-list{
  max-width:860px;
  margin:0 auto;
  background:var(--color-bg);
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.news-item{
  display:flex;
  align-items:center;
  gap:24px;
  padding:24px 28px;
  border-bottom:1px solid var(--color-line);
  transition:background .2s;
}
.news-item:last-child{border-bottom:none}
.news-item:hover{
  background:var(--color-primary-soft);
}
.news-date{
  width:72px;
  flex-shrink:0;
  background:var(--color-primary-soft);
  border-radius:var(--radius-sm);
  text-align:center;
  padding:10px 8px;
}
.news-day{
  display:block;
  font-size:1.5rem;
  font-weight:750;
  color:var(--color-primary);
  line-height:1.2;
}
.news-month{
  display:block;
  font-size:.75rem;
  color:var(--color-muted);
  margin-top:2px;
}
.news-body{
  flex:1;
  min-width:0;
}
.news-body h3{
  font-size:1.0625rem;
  font-weight:600;
  color:var(--color-ink);
  line-height:1.4;
}
.news-body p{
  font-size:.875rem;
  color:var(--color-muted);
  margin-top:6px;
  overflow:hidden;
  text-overflow:ellipsis;
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
}
.news-meta{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:8px;
  flex-shrink:0;
}
.news-cat{
  font-size:.8125rem;
  color:var(--color-accent);
  background:#F4E9DF;
  border-radius:999px;
  padding:2px 10px;
}
.news-read{
  font-size:.875rem;
  font-weight:600;
  color:var(--color-primary);
  transition:color .2s;
}
.news-read:hover{color:var(--color-accent)}
.news-empty{
  padding:60px 24px;
  text-align:center;
  color:var(--color-muted);
  font-size:.9375rem;
}
/* ========== FAQ ========== */
.faq{
  padding:96px 0;
  background:var(--color-bg);
}
.faq-list{
  max-width:860px;
  margin:0 auto;
  background:var(--color-bg);
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.faq-item{
  border-bottom:1px solid var(--color-line);
}
.faq-item:last-child{border-bottom:none}
.faq-question{
  width:100%;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  padding:22px 28px;
  font-size:1rem;
  font-weight:600;
  color:var(--color-ink);
  text-align:left;
  transition:color .2s;
}
.faq-question:hover{color:var(--color-primary)}
.faq-icon{
  position:relative;
  width:20px;
  height:20px;
  flex-shrink:0;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  width:14px;
  height:2px;
  background:var(--color-muted);
  border-radius:2px;
  transform:translate(-50%,-50%);
  transition:all .3s;
}
.faq-icon::after{
  transform:translate(-50%,-50%) rotate(90deg);
}
.faq-item.is-open .faq-icon::after{
  transform:translate(-50%,-50%) rotate(0deg);
  opacity:0;
}
.faq-item.is-open .faq-question{
  color:var(--color-primary);
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-answer p{
  padding:0 28px 22px;
  font-size:.9375rem;
  color:var(--color-body);
  line-height:1.8;
}
.faq-item.is-open .faq-answer{
  max-height:400px;
}
/* ========== Contact ========== */
.contact{
  padding:96px 0;
  background:var(--color-bg-soft);
}
.contact-card{
  max-width:760px;
  margin:0 auto;
  background:var(--color-bg);
  border:1px solid var(--color-line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hover);
  padding:48px;
}
.contact-card .section-head{
  text-align:center;
  margin-bottom:36px;
}
.contact-form{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}
.form-group{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.form-group label{
  font-size:.875rem;
  font-weight:600;
  color:var(--color-ink);
}
.form-group input,
.form-group textarea{
  width:100%;
  border:1px solid var(--color-line);
  border-radius:8px;
  padding:12px 16px;
  font-size:1rem;
  color:var(--color-ink);
  background:var(--color-bg);
  transition:border-color .2s,box-shadow .2s;
}
.form-group input{height:46px}
.form-group textarea{
  height:120px;
  resize:vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder{
  color:var(--color-muted);
  font-size:.9375rem;
}
.form-group input:focus,
.form-group textarea:focus{
  outline:none;
  border-color:var(--color-primary);
  box-shadow:0 0 0 3px rgba(47,109,143,.15);
}
.form-note{
  text-align:center;
  font-size:.8125rem;
  color:var(--color-muted);
  margin-top:-4px;
}
/* ========== CTA Banner ========== */
.cta-banner{
  background:var(--color-primary);
  color:#fff;
  padding:64px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-text h2{
  font-size:clamp(1.375rem,2vw,1.875rem);
  font-weight:700;
  line-height:1.35;
}
.cta-text p{
  margin-top:8px;
  font-size:1rem;
  opacity:.85;
}
/* ========== Footer ========== */
.site-footer{
  background:#142433;
  color:#9BB0C3;
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand h3{
  font-size:1.375rem;
  font-weight:700;
  color:#fff;
  margin-bottom:12px;
}
.footer-brand p{
  font-size:.9375rem;
  line-height:1.7;
  max-width:320px;
}
.footer-links h4,
.footer-contact h4{
  font-size:.9375rem;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-links a{
  display:block;
  font-size:.9375rem;
  padding:5px 0;
  transition:color .2s;
}
.footer-links a:hover{color:var(--color-accent)}
.footer-contact p{
  font-size:.9375rem;
  padding:5px 0;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
  font-size:.8125rem;
  color:#6E8498;
}
.footer-bottom a{color:#6E8498;transition:color .2s}
.footer-bottom a:hover{color:#fff}
/* ========== Responsive ========== */
@media (max-width:1024px){
  .hero-inner{
    gap:40px;
    grid-template-columns:1fr .9fr;
  }
  .services-grid{
    gap:20px;
  }
  .service-card{
    grid-column:span 6;
  }
  .service-card-wide{
    grid-column:span 6;
    flex-direction:column;
  }
  .service-card-wide .service-img{
    flex:auto;
    aspect-ratio:16/9;
  }
  .compare-grid{
    gap:20px;
  }
  .compare-card{
    padding:28px 24px;
  }
}
@media (max-width:768px){
  .site-header{
    height:64px;
  }
  .header-inner{
    height:64px;
  }
  .nav-links{
    display:none;
    position:absolute;
    top:64px;
    left:0;
    right:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:0;
    border-bottom:1px solid var(--color-line);
    box-shadow:0 8px 24px rgba(31,62,89,.08);
  }
  .nav-links.is-open{
    display:flex;
  }
  .nav-links a{
    display:block;
    width:100%;
    padding:0 24px;
    line-height:48px;
    border-bottom:1px solid var(--color-line);
    font-size:1rem;
  }
  .nav-links a.active::after{
    display:none;
  }
  .nav-links a.active{
    color:var(--color-primary);
    font-weight:600;
  }
  .header-cta{
    display:none;
  }
  .nav-toggle{
    display:flex;
  }
  .hero{
    padding:48px 0;
  }
  .hero-inner{
    grid-template-columns:1fr;
    gap:32px;
  }
  .hero-sub{
    font-size:1rem;
  }
  .stats-grid{
    grid-template-columns:repeat(2,1fr);
    gap:16px;
  }
  .stat-card{
    padding:24px 16px;
  }
  .stat-num{
    font-size:1.875rem;
  }
  .services,
  .compare,
  .news,
  .faq,
  .contact{
    padding:64px 0;
  }
  .services-grid{
    grid-template-columns:1fr;
  }
  .service-card,
  .service-card-wide{
    grid-column:span 12;
  }
  .compare-grid{
    grid-template-columns:1fr;
  }
  .vs-badge{
    justify-self:center;
    margin:-12px 0;
  }
  .contact-card{
    padding:28px 20px;
  }
  .form-row{
    grid-template-columns:1fr;
  }
  .cta-inner{
    flex-direction:column;
    align-items:flex-start;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-bottom{
    flex-direction:column;
    text-align:center;
  }
  .news-item{
    flex-direction:row;
    gap:16px;
    padding:20px 16px;
  }
  .news-date{
    width:60px;
  }
  .news-meta{
    display:none;
  }
}
@media (max-width:520px){
  .container{
    padding:0 16px;
  }
  .hero-actions{
    flex-direction:column;
    align-items:stretch;
  }
  .hero-actions .btn{
    width:100%;
  }
  .stats-grid{
    grid-template-columns:1fr 1fr;
  }
  .section-head{
    margin-bottom:32px;
  }
  .faq-question{
    padding:18px 16px;
    font-size:.9375rem;
  }
  .faq-answer p{
    padding:0 16px 18px;
    font-size:.875rem;
  }
  .service-card-wide .service-content{
    padding:20px 16px;
  }
  .service-content{
    padding:20px 16px;
  }
  .news-item{
    flex-direction:column;
    align-items:flex-start;
  }
  .news-date{
    width:auto;
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 12px;
  }
  .news-day{
    font-size:1rem;
  }
  .news-month{
    font-size:.75rem;
    margin-top:0;
  }
}

/* roulang page: article */
:root {
  --color-primary: #2F6D8F;
  --color-primary-deep: #1F4A6A;
  --color-primary-soft: #EAF3F9;
  --color-accent: #B67A4C;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F4F8FC;
  --color-ink: #1E2C3A;
  --color-body: #3E5268;
  --color-muted: #7E93A8;
  --color-line: #E3ECF3;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 20px rgba(31, 62, 89, 0.07);
  --shadow-hover: 0 12px 32px rgba(31, 62, 89, 0.12);
  --container: 1200px;
  --gutter: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-body);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color .2s ease;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--color-ink);
}

.brand:hover {
  color: var(--color-ink);
}

.brand svg {
  flex: 0 0 auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-body);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 44px;
  padding: 0 22px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
}

.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid rgba(47,109,143,0.45);
  outline-offset: 2px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-deep);
  color: #fff;
}

.header-cta {
  height: 40px;
  padding: 0 18px;
  font-size: 0.875rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== Breadcrumb ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 20px;
  margin: 28px 0 0;
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
  transition: color .2s;
}

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

.breadcrumb .sep {
  color: #bccbd8;
}

.breadcrumb .current {
  color: var(--color-body);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 360px;
}

/* ========== Article ========== */
.article-page {
  padding-bottom: 20px;
}

.article-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 42px 0 20px;
}

.article-body h1 {
  font-size: clamp(1.75rem, 3.2vw, 2.4rem);
  font-weight: 750;
  line-height: 1.35;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin-top: 18px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.article-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #c1d3e0;
}

.article-meta .tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.8125rem;
}

.article-cover {
  margin: 26px 0 10px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.article-cover img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.article-content {
  max-width: 760px;
  margin: 30px auto 0;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-ink);
  margin: 2rem 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--color-line);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--color-ink);
  margin: 1.75rem 0 0.85rem;
}

.article-content p {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-body);
  margin: 0 0 1.5em;
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content a:hover {
  color: var(--color-primary-deep);
}

.article-content ul,
.article-content ol {
  margin: 1.2em 0 1.6em;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.55em;
  line-height: 1.8;
  color: var(--color-body);
}

.article-content li::marker {
  color: var(--color-primary);
}

.article-content blockquote {
  margin: 2em 0;
  padding: 1.1rem 1.4rem;
  border-left: 3px solid var(--color-primary);
  background: var(--color-bg-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-body);
  font-size: 1rem;
}

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

.article-content img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin: 1.5rem 0;
}

.article-content figure {
  margin: 1.75rem 0;
}

.article-content figcaption {
  margin-top: 10px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.75rem 0;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.article-content th,
.article-content td {
  border: 1px solid var(--color-line);
  padding: 0.68rem 0.85rem;
  text-align: left;
}

.article-content th {
  background: var(--color-primary-soft);
  color: var(--color-ink);
  font-weight: 600;
}

.article-content tr:nth-child(even) td {
  background: var(--color-bg-soft);
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--color-line);
  margin: 2.2em 0;
}

/* ========== Back Link ========== */
.article-back {
  max-width: 760px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  text-align: center;
}

.article-back a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-primary);
}

.article-back a:hover {
  color: var(--color-primary-deep);
}

/* ========== Empty State ========== */
.article-empty {
  max-width: 640px;
  margin: 56px auto;
  padding: 56px 32px;
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  text-align: center;
}

.article-empty svg {
  margin: 0 auto 20px;
  display: block;
}

.article-empty h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.article-empty p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 24px;
}

/* ========== CTA Bar ========== */
.cta-bar {
  margin-top: 56px;
  background: var(--color-primary);
  color: #fff;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 44px;
  padding-bottom: 44px;
}

.cta-text h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
}

.cta-text p {
  margin-top: 8px;
  color: rgba(255,255,255,0.85);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.btn-white {
  background: #fff;
  color: var(--color-primary);
  border: 1px solid transparent;
}

.btn-white:hover {
  background: rgba(255,255,255,0.92);
  color: var(--color-primary-deep);
}

/* ========== Footer ========== */
.site-footer {
  background: #1E2C3A;
  color: #c9d8e5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 40px;
  padding-top: 52px;
  padding-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 320px;
  color: #a7bccc;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  margin-bottom: 10px;
  font-size: 0.875rem;
  color: #a7bccc;
}

.footer-links a:hover {
  color: #fff;
}

.footer-contact p {
  font-size: 0.875rem;
  margin-bottom: 10px;
  color: #a7bccc;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.8125rem;
  color: #869cb0;
}

.footer-bottom a {
  color: #869cb0;
}

.footer-bottom a:hover {
  color: #fff;
}

/* ========== Responsive ========== */
@media (max-width: 992px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }

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

@media (max-width: 768px) {
  body {
    font-size: 0.9375rem;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-inner {
    height: 64px;
  }

  .header-cta {
    display: none;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
    box-shadow: 0 12px 24px rgba(31,62,89,0.06);
  }

  .nav-links.open {
    max-height: 180px;
  }

  .nav-links a {
    width: 100%;
    padding: 0;
    line-height: 52px;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-line);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .nav-links a.active::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .breadcrumb {
    margin-top: 16px;
    padding: 14px 16px;
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
  }

  .article-body {
    padding-top: 28px;
  }

  .article-cover img {
    aspect-ratio: 16 / 10;
  }

  .article-content {
    font-size: 1rem;
  }

  .article-content p {
    font-size: 1rem;
    line-height: 1.8;
  }

  .article-content h2 {
    font-size: 1.35rem;
  }

  .article-content h3 {
    font-size: 1.15rem;
  }

  .article-meta {
    gap: 8px 12px;
    font-size: 0.8125rem;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .cta-text h2 {
    font-size: 1.3rem;
  }

  .cta-text p {
    font-size: 0.875rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 40px;
    padding-bottom: 28px;
  }

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

@media (max-width: 520px) {
  .breadcrumb .current {
    max-width: 180px;
  }

  .article-body h1 {
    font-size: 1.5rem;
  }

  .article-content table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .article-empty {
    padding: 40px 20px;
    margin: 36px auto;
  }
}