/* roulang page: index */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --accent: #e8a838;
  --accent-light: #f0c060;
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-light: #5a6a7e;
  --text-weak: #8a9aaa;
  --border: #e4e8ee;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(26, 58, 92, 0.08);
  --shadow-hover: 0 12px 40px rgba(26, 58, 92, 0.16);
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, system-ui, sans-serif;
  --max-w: 1200px;
  --header-h: 60px;
  --nav-h: 48px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
button { cursor: pointer; background: none; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* header + nav (杂志频道风格) */
.site-header { background: var(--primary); color: #fff; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 12px rgba(0,0,0,0.1); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); padding: 0 24px; max-width: var(--max-w); margin: 0 auto; }
.logo { font-size: 22px; font-weight: 800; letter-spacing: 1px; color: #fff; display: flex; align-items: center; gap: 10px; }
.logo i { color: var(--accent); font-size: 26px; }
.logo:hover { color: var(--accent-light); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-actions a { color: rgba(255,255,255,0.85); font-size: 15px; padding: 6px 14px; border-radius: var(--radius-sm); transition: var(--transition); }
.header-actions a:hover { background: rgba(255,255,255,0.12); color: #fff; }
.menu-toggle { display: none; color: #fff; font-size: 24px; padding: 4px 8px; }
.nav-bar { background: rgba(255,255,255,0.06); border-top: 1px solid rgba(255,255,255,0.08); }
.nav-inner { display: flex; align-items: center; height: var(--nav-h); max-width: var(--max-w); margin: 0 auto; padding: 0 24px; gap: 4px; overflow-x: auto; }
.nav-inner a { color: rgba(255,255,255,0.8); font-size: 14px; padding: 6px 18px; border-radius: var(--radius-sm); white-space: nowrap; transition: var(--transition); position: relative; }
.nav-inner a:hover { background: rgba(255,255,255,0.1); color: #fff; }
.nav-inner a.active { background: var(--accent); color: var(--primary); font-weight: 600; }

/* Hero */
.hero { position: relative; min-height: 480px; display: flex; align-items: center; justify-content: center; text-align: center; overflow: hidden; background: var(--primary); }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.3; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(26,58,92,0.88) 0%, rgba(42,90,140,0.7) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 800px; padding: 60px 24px; color: #fff; }
.hero-content h1 { font-size: 42px; font-weight: 800; letter-spacing: 1px; margin-bottom: 20px; line-height: 1.2; }
.hero-content h1 i { color: var(--accent); }
.hero-content p { font-size: 18px; color: rgba(255,255,255,0.85); margin-bottom: 32px; max-width: 640px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: var(--radius-sm); font-weight: 600; font-size: 16px; transition: var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--accent); color: var(--primary); }
.btn-primary:hover { background: var(--accent-light); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.35); }
.btn-outline { background: transparent; border-color: rgba(255,255,255,0.6); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; transform: translateY(-2px); }

/* Sections */
.section { padding: 80px 0; }
.section-dark { background: var(--primary); color: #fff; }
.section-alt { background: #fff; }
.section-title { font-size: 32px; font-weight: 700; text-align: center; margin-bottom: 12px; letter-spacing: 0.5px; }
.section-sub { font-size: 17px; text-align: center; color: var(--text-light); max-width: 680px; margin: 0 auto 48px; }
.section-dark .section-sub { color: rgba(255,255,255,0.7); }
.section-dark .section-title { color: #fff; }

/* Cards grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px 28px; transition: var(--transition); border: 1px solid var(--border); }
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.card-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 18px; color: #fff; }
.card-icon.blue { background: var(--primary); }
.card-icon.gold { background: var(--accent); color: var(--primary); }
.card-icon.teal { background: #1a7a6a; }
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: 15px; line-height: 1.6; }

/* Stats */
.stats-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item { padding: 32px 16px; background: rgba(255,255,255,0.06); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.1); }
.stat-num { font-size: 40px; font-weight: 800; color: var(--accent); line-height: 1.2; margin-bottom: 6px; }
.stat-label { font-size: 15px; color: rgba(255,255,255,0.75); }

/* Steps */
.steps-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-item { text-align: center; padding: 32px 16px; position: relative; }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--primary); font-size: 20px; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.step-item h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-light); }

/* Posts list (CMS) */
.posts-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.post-card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border); display: flex; flex-direction: column; }
.post-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.post-card img { width: 100%; height: 200px; object-fit: cover; }
.post-body { padding: 22px 24px; flex: 1; display: flex; flex-direction: column; }
.post-cat { display: inline-block; background: rgba(232,168,56,0.15); color: var(--accent); font-size: 12px; font-weight: 600; padding: 3px 12px; border-radius: 20px; margin-bottom: 10px; width: fit-content; }
.post-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.post-body h3 a { color: var(--text); }
.post-body h3 a:hover { color: var(--accent); }
.post-body p { font-size: 14px; color: var(--text-light); margin-bottom: 12px; flex: 1; }
.post-meta { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--text-weak); border-top: 1px solid var(--border); padding-top: 12px; }
.post-empty { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-weak); font-size: 16px; background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); }

/* FAQ */
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-card); border-radius: var(--radius-sm); margin-bottom: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); border: 1px solid var(--border); overflow: hidden; }
.faq-q { padding: 18px 24px; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: space-between; transition: var(--transition); }
.faq-q:hover { background: rgba(232,168,56,0.04); }
.faq-q i { transition: var(--transition); color: var(--accent); }
.faq-q.open i { transform: rotate(180deg); }
.faq-a { padding: 0 24px 18px; color: var(--text-light); font-size: 15px; line-height: 1.7; display: none; }
.faq-a.show { display: block; }

/* CTA */
.cta-wrap { text-align: center; padding: 60px 24px; background: var(--primary); border-radius: var(--radius); position: relative; overflow: hidden; }
.cta-wrap::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.08; }
.cta-wrap h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 14px; position: relative; }
.cta-wrap p { color: rgba(255,255,255,0.8); margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; position: relative; }
.cta-wrap .btn-primary { font-size: 18px; padding: 16px 40px; position: relative; }

/* Footer */
.site-footer { background: #0f1f30; color: rgba(255,255,255,0.7); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.footer-brand .logo { font-size: 20px; margin-bottom: 12px; color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 14px; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; text-align: center; font-size: 13px; color: rgba(255,255,255,0.4); }

/* Responsive */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats-wrap { grid-template-columns: repeat(2, 1fr); }
  .steps-wrap { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .header-actions a { display: none; }
  .menu-toggle { display: block; }
  .nav-bar { display: none; }
  .nav-bar.open { display: block; }
  .nav-inner { flex-wrap: wrap; height: auto; padding: 12px 24px; gap: 8px; }
  .hero-content h1 { font-size: 30px; }
  .hero-content p { font-size: 16px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 26px; }
  .grid-3, .grid-2, .posts-list { grid-template-columns: 1fr; }
  .stats-wrap { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .steps-wrap { grid-template-columns: 1fr; gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .stat-num { font-size: 30px; }
}
@media (max-width: 520px) {
  .hero { min-height: 360px; }
  .hero-content h1 { font-size: 24px; }
  .hero-content p { font-size: 14px; }
  .btn { padding: 12px 24px; font-size: 14px; }
  .card { padding: 24px 18px; }
  .post-body { padding: 16px 18px; }
  .container { padding: 0 16px; }
}

/* roulang page: article */
:root {
  --primary: #1a2a6c;
  --primary-light: #2c3e7a;
  --primary-dark: #0f1a4a;
  --accent: #d4a853;
  --accent-light: #f0c15a;
  --accent-dark: #b88d3a;
  --bg: #ffffff;
  --bg-alt: #f7f8fc;
  --bg-card: #ffffff;
  --text: #1e1e2a;
  --text-light: #5a5a72;
  --text-muted: #8a8aa0;
  --border: #e6e8f0;
  --shadow: 0 2px 16px rgba(26,42,108,0.08);
  --shadow-hover: 0 8px 32px rgba(26,42,108,0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --max-width: 1200px;
  --header-h: 68px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }
h1, h2, h3, h4, h5 { line-height: 1.3; font-weight: 700; color: var(--text); }

/* ===== Header & Nav ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 2px 24px rgba(0,0,0,0.06); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
}
.logo {
  font-size: 1.35rem; font-weight: 800; color: var(--primary);
  display: flex; align-items: center; gap: 8px; letter-spacing: -0.3px;
}
.logo i { color: var(--accent); font-size: 1.2rem; }
.logo:hover { color: var(--primary); }
.nav-bar { display: flex; align-items: center; gap: 4px; }
.nav-bar a {
  padding: 8px 18px; border-radius: var(--radius-sm);
  font-size: 0.92rem; font-weight: 500; color: var(--text-light);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.nav-bar a i { margin-right: 6px; font-size: 0.85rem; }
.nav-bar a:hover { background: var(--bg-alt); color: var(--primary); }
.nav-bar a.active { background: var(--primary); color: #fff; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 4px; }
@media (max-width: 768px) {
  .nav-toggle { display: flex; align-items: center; justify-content: center; }
  .nav-bar { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.99); backdrop-filter: blur(12px); flex-direction: column; padding: 16px; gap: 6px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
  .nav-bar.open { display: flex; }
  .nav-bar a { width: 100%; padding: 12px 16px; }
}

/* ===== Article Hero ===== */
.article-hero {
  margin-top: var(--header-h);
  padding: 80px 0 60px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
  min-height: 320px;
  display: flex; align-items: center;
}
.article-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.12;
  mix-blend-mode: overlay;
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: rgba(255,255,255,0.7); margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255,255,255,0.8); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb span { color: rgba(255,255,255,0.5); }
.article-hero h1 {
  font-size: 2.4rem; font-weight: 800; color: #fff;
  max-width: 900px; line-height: 1.25;
  margin-bottom: 20px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 16px 28px;
  font-size: 0.92rem; color: rgba(255,255,255,0.8);
  align-items: center;
}
.article-meta .category {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  background: var(--accent); color: var(--primary-dark);
  font-size: 0.82rem; font-weight: 600;
}
.article-meta i { margin-right: 6px; opacity: 0.7; }
@media (max-width: 768px) {
  .article-hero { padding: 60px 0 40px; min-height: 240px; }
  .article-hero h1 { font-size: 1.6rem; }
  .article-meta { gap: 10px 18px; font-size: 0.85rem; }
}

/* ===== Article Body ===== */
.article-body {
  padding: 60px 0 40px;
  background: var(--bg);
}
.article-layout {
  display: grid; grid-template-columns: 1fr 320px; gap: 48px;
}
.article-content {
  font-size: 1.08rem; line-height: 1.9;
  color: var(--text);
}
.article-content p { margin-bottom: 1.6em; }
.article-content h2 { font-size: 1.6rem; margin-top: 2.2em; margin-bottom: 0.8em; }
.article-content h3 { font-size: 1.3rem; margin-top: 1.8em; margin-bottom: 0.6em; }
.article-content ul, .article-content ol { margin-bottom: 1.6em; padding-left: 1.6em; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 0.4em; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--bg-alt);
  padding: 16px 24px; margin-bottom: 1.6em;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-light); font-style: normal;
}
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--accent); }
.article-content img { border-radius: var(--radius); margin: 1.6em 0; box-shadow: var(--shadow); }
.article-content .table-wrap { overflow-x: auto; margin-bottom: 1.6em; }
.article-content table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.article-content th, .article-content td { padding: 10px 16px; border: 1px solid var(--border); text-align: left; }
.article-content th { background: var(--bg-alt); font-weight: 600; }
.article-tags {
  margin-top: 40px; padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
}
.article-tags .tag-label { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }
.article-tags .tag {
  display: inline-block; padding: 6px 16px; border-radius: 20px;
  background: var(--bg-alt); color: var(--text-light);
  font-size: 0.82rem; font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.article-tags .tag:hover { background: var(--primary); color: #fff; }
.article-nav {
  margin-top: 40px; padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 20px;
  flex-wrap: wrap;
}
.article-nav a {
  display: flex; align-items: center; gap: 8px;
  color: var(--text-light); font-size: 0.92rem;
  max-width: 45%;
}
.article-nav a:hover { color: var(--primary); }
.article-nav .nav-next { text-align: right; justify-content: flex-end; }
.article-not-found {
  text-align: center; padding: 80px 20px;
  background: var(--bg-alt); border-radius: var(--radius);
}
.article-not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
.article-not-found h2 { font-size: 1.6rem; margin-bottom: 12px; }
.article-not-found p { color: var(--text-light); margin-bottom: 24px; }

/* ===== Sidebar ===== */
.sidebar { position: relative; }
.sidebar-card {
  background: var(--bg-alt); border-radius: var(--radius);
  padding: 28px 24px; margin-bottom: 28px;
  border: 1px solid var(--border);
}
.sidebar-card h3 {
  font-size: 1.15rem; margin-bottom: 18px;
  padding-bottom: 12px; border-bottom: 2px solid var(--accent);
  display: flex; align-items: center; gap: 8px;
}
.sidebar-list { display: flex; flex-direction: column; gap: 14px; }
.sidebar-list li { }
.sidebar-list a {
  display: flex; gap: 12px; align-items: flex-start;
  color: var(--text); font-size: 0.92rem; line-height: 1.4;
  transition: color var(--transition);
}
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list .thumb {
  width: 70px; height: 56px; border-radius: 6px; object-fit: cover; flex-shrink: 0;
  background: var(--border);
}
.sidebar-list .info { flex: 1; min-width: 0; }
.sidebar-list .info .title { font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-list .info .date { font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; }
.sidebar-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff; border: none;
}
.sidebar-cta h3 { color: #fff; border-bottom-color: var(--accent); }
.sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 18px; line-height: 1.6; }
.sidebar-cta .btn { width: 100%; justify-content: center; }
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; gap: 36px; }
  .sidebar { max-width: 480px; }
}

/* ===== Related ===== */
.related-section {
  padding: 60px 0;
  background: var(--bg-alt);
}
.related-section h2 {
  font-size: 1.8rem; margin-bottom: 32px;
  text-align: center;
}
.related-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px;
}
.related-card {
  background: var(--bg-card); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card .card-img {
  width: 100%; height: 180px; object-fit: cover;
  background: var(--border);
}
.related-card .card-body { padding: 20px; }
.related-card .card-cat {
  display: inline-block; padding: 2px 12px; border-radius: 12px;
  background: var(--bg-alt); color: var(--primary); font-size: 0.78rem; font-weight: 600;
  margin-bottom: 8px;
}
.related-card .card-title {
  font-size: 1.05rem; font-weight: 600; line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 8px;
}
.related-card .card-title a { color: var(--text); }
.related-card .card-title a:hover { color: var(--primary); }
.related-card .card-date { font-size: 0.82rem; color: var(--text-muted); }

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center; color: #fff;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.08; mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 2rem; color: #fff; margin-bottom: 16px; }
.cta-section p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto 28px; line-height: 1.7; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 36px; border-radius: 50px;
  font-size: 1rem; font-weight: 600; border: none; cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  background: var(--accent); color: var(--primary-dark);
}
.btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,168,83,0.35); color: var(--primary-dark); }
.btn:active { transform: translateY(0); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; box-shadow: none; }
.btn-sm { padding: 10px 24px; font-size: 0.9rem; }

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark); color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; font-size: 1.3rem; margin-bottom: 16px; }
.footer-brand .logo i { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.8; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
.footer-col a { display: block; color: rgba(255,255,255,0.7); font-size: 0.9rem; padding: 4px 0; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0; text-align: center;
  font-size: 0.85rem; opacity: 0.7;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

/* ===== No Article State ===== */
.no-article-wrap { padding: 80px 0; background: var(--bg); }

/* ===== Responsive ===== */
@media (max-width: 520px) {
  .article-hero h1 { font-size: 1.35rem; }
  .article-content { font-size: 1rem; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 1.5rem; }
  .article-nav { flex-direction: column; }
  .article-nav a { max-width: 100%; }
  .article-nav .nav-next { text-align: left; justify-content: flex-start; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #1a2a6c;
            --clr-primary-light: #2a3f8a;
            --clr-secondary: #e8b830;
            --clr-secondary-light: #f0d060;
            --clr-accent: #c0392b;
            --clr-bg: #f8f9fc;
            --clr-bg-alt: #ffffff;
            --clr-bg-dark: #0f1a3a;
            --clr-text: #1e2a3a;
            --clr-text-light: #5a6a7a;
            --clr-text-muted: #8a9aaa;
            --clr-border: #e2e6ee;
            --clr-border-light: #f0f2f6;
            --clr-white: #ffffff;
            --clr-black: #0b0e1a;
            --clr-success: #27ae60;
            --clr-warning: #f39c12;
            --clr-danger: #e74c3c;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.12);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 80px;
            --nav-height: 52px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--clr-text);
            background: var(--clr-bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-secondary);
        }
        a:focus-visible {
            outline: 3px solid var(--clr-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--clr-text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--clr-text-light);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .text-center {
            text-align: center;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            background: var(--clr-white);
            border-bottom: 1px solid var(--clr-border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--clr-primary);
        }
        .logo i {
            color: var(--clr-secondary);
            font-size: 1.6rem;
        }
        .logo:hover {
            color: var(--clr-primary);
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--clr-bg);
            border-radius: var(--radius-md);
            padding: 4px;
            border: 1px solid var(--clr-border-light);
        }
        .nav-bar a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--clr-text-light);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-bar a i {
            font-size: 0.95rem;
            color: var(--clr-text-muted);
            transition: color var(--transition);
        }
        .nav-bar a:hover {
            background: var(--clr-white);
            color: var(--clr-primary);
            box-shadow: var(--shadow-sm);
        }
        .nav-bar a:hover i {
            color: var(--clr-primary);
        }
        .nav-bar a.active {
            background: var(--clr-primary);
            color: var(--clr-white);
            box-shadow: 0 4px 12px rgba(26, 42, 108, 0.25);
        }
        .nav-bar a.active i {
            color: var(--clr-white);
        }
        .nav-bar a.active:hover {
            background: var(--clr-primary-light);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--clr-primary);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--clr-bg);
        }
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .nav-bar {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--clr-white);
                flex-direction: column;
                padding: 16px 24px;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                box-shadow: var(--shadow-lg);
                border: none;
                border-top: 1px solid var(--clr-border);
                gap: 8px;
            }
            .nav-bar.open {
                display: flex;
            }
            .nav-bar a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                height: 64px;
                padding: 0 16px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--clr-bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-radius: 0 0 var(--radius-xl) var(--radius-xl);
            overflow: hidden;
            isolation: isolate;
            padding: 60px 24px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 58, 0.82) 0%, rgba(26, 42, 108, 0.65) 100%);
            z-index: 1;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .category-hero h1 {
            color: var(--clr-white);
            font-weight: 700;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 24px;
            text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
        }
        .hero-badge {
            display: inline-block;
            background: var(--clr-secondary);
            color: var(--clr-primary);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
            box-shadow: 0 4px 14px rgba(232, 184, 48, 0.35);
        }
        @media (max-width: 768px) {
            .category-hero {
                min-height: 260px;
                padding: 40px 20px;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .category-hero p {
                font-size: 1rem;
            }
        }
        @media (max-width: 480px) {
            .category-hero {
                min-height: 220px;
                padding: 32px 16px;
            }
        }

        /* ===== Intro Block ===== */
        .intro-block {
            background: var(--clr-white);
            border-radius: var(--radius-md);
            padding: 48px 40px;
            box-shadow: var(--shadow-sm);
            margin-top: -40px;
            position: relative;
            z-index: 3;
            border: 1px solid var(--clr-border-light);
        }
        .intro-block .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .intro-block .intro-text h3 {
            margin-bottom: 12px;
        }
        .intro-block .intro-text p {
            font-size: 1.02rem;
        }
        .intro-block .intro-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .intro-block .stat-item {
            background: var(--clr-bg);
            border-radius: var(--radius-sm);
            padding: 20px 16px;
            text-align: center;
            border: 1px solid var(--clr-border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .intro-block .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .intro-block .stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--clr-primary);
            line-height: 1.2;
        }
        .intro-block .stat-label {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .intro-block {
                padding: 32px 24px;
                margin-top: -24px;
            }
            .intro-block .intro-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .intro-block .intro-stats {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .intro-block {
                padding: 24px 16px;
                margin-top: -16px;
            }
            .intro-block .stat-number {
                font-size: 1.4rem;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 28px;
        }
        .card-item {
            background: var(--clr-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--clr-border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .card-item .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-item .card-body {
            padding: 22px 24px 26px;
        }
        .card-item .card-tag {
            display: inline-block;
            background: var(--clr-bg);
            color: var(--clr-primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 30px;
            margin-bottom: 10px;
            border: 1px solid var(--clr-border);
        }
        .card-item h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            transition: color var(--transition);
        }
        .card-item:hover h3 {
            color: var(--clr-primary-light);
        }
        .card-item p {
            font-size: 0.92rem;
            color: var(--clr-text-muted);
            margin-bottom: 14px;
        }
        .card-item .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--clr-text-muted);
        }
        .card-item .card-meta i {
            margin-right: 4px;
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-item .card-body {
                padding: 18px 18px 22px;
            }
        }

        /* ===== Data / Analytics Section ===== */
        .data-section {
            background: var(--clr-bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            color: var(--clr-white);
            position: relative;
            isolation: isolate;
        }
        .data-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(145deg, rgba(15, 26, 58, 0.88) 0%, rgba(26, 42, 108, 0.78) 100%);
            border-radius: var(--radius-xl);
            z-index: 1;
        }
        .data-section>* {
            position: relative;
            z-index: 2;
        }
        .data-section .section-title h2 {
            color: var(--clr-white);
        }
        .data-section .section-title p {
            color: rgba(255, 255, 255, 0.75);
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 32px;
        }
        .data-card {
            background: rgba(255, 255, 255, 0.07);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: background var(--transition), transform var(--transition);
        }
        .data-card:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }
        .data-card .data-icon {
            font-size: 2.2rem;
            color: var(--clr-secondary);
            margin-bottom: 12px;
        }
        .data-card .data-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--clr-white);
            line-height: 1.2;
        }
        .data-card .data-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }
        @media (max-width: 900px) {
            .data-section {
                padding: 40px 28px;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 480px) {
            .data-section {
                padding: 32px 16px;
                border-radius: var(--radius-md);
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .data-card {
                padding: 20px 12px;
            }
            .data-card .data-number {
                font-size: 1.5rem;
            }
        }

        /* ===== Tags / Badges ===== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 12px;
        }
        .tag-item {
            display: inline-block;
            background: var(--clr-white);
            color: var(--clr-primary);
            font-weight: 500;
            font-size: 0.88rem;
            padding: 8px 22px;
            border-radius: 40px;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .tag-item:hover {
            background: var(--clr-primary);
            color: var(--clr-white);
            border-color: var(--clr-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 42, 108, 0.2);
        }
        .tag-item i {
            margin-right: 6px;
            font-size: 0.8rem;
        }
        .tag-item.hot {
            border-color: var(--clr-secondary);
            background: rgba(232, 184, 48, 0.08);
        }
        .tag-item.hot:hover {
            background: var(--clr-secondary);
            color: var(--clr-primary);
            border-color: var(--clr-secondary);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-white);
            border: 1px solid var(--clr-border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 500;
            font-size: 1rem;
            color: var(--clr-text);
            cursor: pointer;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--clr-bg);
        }
        .faq-question i {
            color: var(--clr-primary);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--clr-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 400px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            margin-bottom: 0;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer.open {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            color: var(--clr-white);
            box-shadow: 0 16px 48px rgba(26, 42, 108, 0.25);
        }
        .cta-block h2 {
            color: var(--clr-white);
            margin-bottom: 12px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-block .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--clr-secondary);
            color: var(--clr-primary);
            box-shadow: 0 4px 16px rgba(232, 184, 48, 0.35);
        }
        .btn-primary:hover {
            background: var(--clr-secondary-light);
            color: var(--clr-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 184, 48, 0.45);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--clr-white);
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--clr-white);
            border-color: var(--clr-white);
            transform: translateY(-2px);
        }
        @media (max-width: 640px) {
            .cta-block {
                padding: 36px 24px;
                border-radius: var(--radius-md);
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.92rem;
                width: 100%;
                justify-content: center;
            }
            .cta-block .btn-group {
                flex-direction: column;
                gap: 12px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            margin-top: 80px;
        }
        .site-footer .container {
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: var(--clr-white);
            font-size: 1.3rem;
            margin-bottom: 14px;
        }
        .footer-brand .logo i {
            color: var(--clr-secondary);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.92rem;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: var(--clr-white);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--clr-secondary);
            padding-left: 6px;
        }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            letter-spacing: 0.3px;
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer {
                padding-top: 40px;
                margin-top: 48px;
            }
            .footer-bottom {
                padding: 18px 0;
                font-size: 0.78rem;
            }
        }

        /* ===== Utility ===== */
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 480px) {
            .section {
                padding: 36px 0;
            }
            .container {
                padding: 0 16px;
            }
        }