/* =========================================================
   horizbox Blog — dedicated styles (index + article pages)
   Keeps the main site CSS untouched; matches brand tokens.
   ========================================================= */
:root{
  --navy:#0F1B2D;
  --navy-2:#1B2A4A;
  --ink:#182234;
  --paper:#FFFFFF;
  --paper-2:#F4F7FB;
  --line:#E3E9F2;
  --accent:#FF5A2D;
  --accent-2:#FF7A45;
  --txt:#25314a;
  --muted:#5C6B85;
  --radius:16px;
  --shadow:0 10px 30px rgba(15,27,45,.08);
  --shadow-lg:0 24px 60px rgba(15,27,45,.16);
  --ease:cubic-bezier(.22,.8,.28,1);
}

/* page background for a softer, "reading" feel */
body.blog-page{background:var(--paper-2);color:var(--txt)}

/* 与主站一致的深蓝固定导航栏（白色文字在浅色 hero 上同样清晰） */
.blog-header{
  background:var(--navy);
  box-shadow:0 4px 24px rgba(0,0,0,.18);
}
.blog-header.scrolled{box-shadow:0 6px 30px rgba(0,0,0,.28)}

/* ============ BLOG INDEX ============ */
.blog-hero{
  text-align:center;
  padding:84px 0 40px;
  background:linear-gradient(180deg,#fff 0%,var(--paper-2) 100%);
  border-bottom:1px solid var(--line);
}
.blog-hero .kicker{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.2em;color:var(--accent);margin-bottom:16px}
.blog-hero h1{font-size:clamp(30px,4.4vw,48px);font-weight:800;letter-spacing:-.02em;color:var(--ink);line-height:1.12;margin:0 0 .45em}
.blog-hero p{color:var(--muted);font-size:17px;line-height:1.7;max-width:680px;margin:0 auto}

.blog-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  margin-top:50px;
}
.blog-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .3s;
}
.blog-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.blog-thumb{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:linear-gradient(135deg,var(--navy-2),var(--accent));
}
.blog-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s var(--ease)}
.blog-card:hover .blog-thumb img{transform:scale(1.07)}
.blog-thumb span{
  position:absolute;top:13px;left:13px;
  background:var(--accent);color:#fff;
  font-size:11px;font-weight:800;letter-spacing:.1em;
  padding:6px 12px;border-radius:999px;
  box-shadow:0 4px 14px rgba(0,0,0,.22);
}
.blog-card .blog-meta{padding:18px 22px 0;margin:0}
.blog-card h2{font-size:19px;line-height:1.35;font-weight:800;color:var(--ink);margin:10px 0 8px;padding:0 22px}
.blog-card h2 a{color:inherit;text-decoration:none;transition:color .25s}
.blog-card h2 a:hover{color:var(--accent)}
.blog-card > p:not(.blog-meta){padding:0 22px;color:var(--muted);font-size:14.5px;line-height:1.65;margin:0 0 6px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.blog-more{display:inline-block;margin-top:6px;padding:6px 22px 24px;color:var(--accent);font-weight:700;font-size:14.5px;text-decoration:none;transition:transform .25s}
.blog-more:hover{transform:translateX(4px)}

/* ============ ARTICLE PAGE ============ */
.blog-post-main{padding:96px 0 96px}
.blog-post{font-size:17.5px;line-height:1.85;color:#2b3648}
.blog-post > p:first-child a{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--accent);font-weight:700;font-size:14.5px;text-decoration:none;margin-bottom:18px;
}
.blog-post > p:first-child a:hover{text-decoration:underline}
.blog-post h1{
  font-size:clamp(28px,4.2vw,44px);font-weight:800;letter-spacing:-.02em;
  color:var(--ink);line-height:1.16;margin:0 0 .35em;
}
.blog-post .blog-meta{
  text-align:center;color:var(--muted);font-size:13.5px;letter-spacing:.02em;
  margin:.2em 0 1.8em;
}
.blog-post h2{
  font-size:clamp(22px,2.8vw,28px);font-weight:800;color:var(--ink);
  line-height:1.3;margin:2.1em 0 .7em;padding-left:15px;
  border-left:4px solid var(--accent);
}
.blog-post h3{font-size:21px;font-weight:800;color:var(--ink);margin:1.8em 0 .6em}
.blog-post p{margin:0 0 1.15em}
.blog-post p a{color:var(--accent);text-underline-offset:3px;text-decoration:underline;font-weight:600}
.blog-post strong{color:var(--ink);font-weight:700}
.blog-post ul{list-style:none;margin:0 0 1.4em;padding:0}
.blog-post ul li{position:relative;padding-left:30px;margin:0 0 .7em;line-height:1.7}
.blog-post ul li::before{
  content:"";position:absolute;left:4px;top:.55em;width:14px;height:8px;
  border-left:2.5px solid var(--accent);border-bottom:2.5px solid var(--accent);
  transform:rotate(-45deg);
}
.product-hero-img{
  width:100%;aspect-ratio:16/9;object-fit:cover;display:block;
  border-radius:18px;box-shadow:var(--shadow-lg);margin:6px 0 4px;
}
.blog-post img:not(.product-hero-img){max-width:100%;height:auto;display:block;border-radius:14px;box-shadow:var(--shadow);margin:1.6em auto}

.related-guides{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:26px 28px;margin:2.6em 0;
}
.related-guides h2{font-size:21px;margin:0 0 .7em;padding:0;border:0}
.related-guides ul{margin:0;padding:0;list-style:none}
.related-guides li{margin:.55em 0;padding-left:0}
.related-guides li::before{display:none}
.related-guides li a{
  color:var(--ink);text-decoration:none;font-weight:600;
  display:inline-flex;align-items:center;gap:8px;transition:color .25s,transform .25s;
}
.related-guides li a::before{content:"→";color:var(--accent);font-weight:800}
.related-guides li a:hover{color:var(--accent);transform:translateX(3px)}

.blog-gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:2em 0}
.blog-gallery img{width:100%;border-radius:14px;box-shadow:var(--shadow);margin:0}

.blog-cta{
  background:linear-gradient(135deg,var(--navy-2),var(--accent));
  color:#fff;border-radius:22px;padding:42px 34px;text-align:center;
  margin:2.8em 0 0;box-shadow:var(--shadow-lg);
}
.blog-cta h2{color:#fff;font-size:26px;margin:0 0 .4em;padding:0;border:0}
.blog-cta p{color:#E6ECF7;font-size:16px;margin:0 auto 1.4em;max-width:560px}
.blog-cta .btn-primary{background:#fff;color:var(--accent);box-shadow:none}
.blog-cta .btn-primary:hover{background:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.18)}
.blog-cta .btn-wa{margin-left:10px}

/* ============ RESPONSIVE ============ */
@media (max-width:980px){
  .blog-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .blog-hero{padding:56px 0 30px}
  .blog-grid{grid-template-columns:1fr;gap:20px}
  .blog-gallery{grid-template-columns:1fr}
  .blog-post-main{padding:44px 0 70px}
  .blog-post{font-size:16.5px;line-height:1.8}
  .blog-cta{padding:32px 22px}
  .blog-cta .btn-wa{margin-left:0;margin-top:10px}
}