/* roulang page: index */
:root {
  --primary: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --secondary: #f59e0b;
  --secondary-light: #fbbf24;
  --accent: #ef4444;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --bg-gray: #f1f5f9;
  --text: #0f172a;
  --text-light: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --container: 1280px;
  --nav-height: 64px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }
p { margin-bottom: 1rem; color: var(--text-light); }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { position: relative; display: inline-block; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--secondary); border-radius: 4px; margin: 12px auto 0; }
.section-title p { max-width: 640px; margin: 12px auto 0; font-size: 1.0625rem; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-weight: 600; font-size: 0.9375rem; transition: var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(30,64,175,0.30); }
.btn-secondary { background: var(--secondary); color: #fff; border-color: var(--secondary); }
.btn-secondary:hover { background: #d97706; border-color: #d97706; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.30); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.badge { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; background: var(--bg-gray); color: var(--text-light); }
.badge-primary { background: rgba(30,64,175,0.10); color: var(--primary); }
.badge-secondary { background: rgba(245,158,11,0.12); color: #b45309; }
.tag { display: inline-block; padding: 2px 12px; border-radius: 4px; font-size: 0.75rem; background: var(--bg-gray); color: var(--text-light); margin: 2px; }
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
/* ===== Header & Nav (双层) ===== */
.header-top { background: #fff; border-bottom: 1px solid var(--border); height: var(--nav-height); position: sticky; top: 0; z-index: 100; }
.header-top .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.35rem; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.logo i { font-size: 1.5rem; color: var(--secondary); }
.logo span { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.search-box { display: flex; align-items: center; background: var(--bg-gray); border-radius: 50px; padding: 0 16px; border: 1px solid var(--border); transition: var(--transition); }
.search-box:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(30,64,175,0.08); }
.search-box input { border: none; background: transparent; padding: 8px 8px; width: 180px; font-size: 0.875rem; color: var(--text); }
.search-box input::placeholder { color: var(--text-muted); }
.search-box button { color: var(--text-light); padding: 8px; font-size: 1rem; }
.search-box button:hover { color: var(--primary); }
.header-actions .btn { padding: 8px 20px; font-size: 0.8125rem; }
.nav-bar { background: var(--bg-dark); border-bottom: 1px solid rgba(255,255,255,0.06); position: sticky; top: var(--nav-height); z-index: 99; }
.nav-bar .container { display: flex; align-items: center; gap: 4px; overflow-x: auto; scrollbar-width: none; padding-top: 0; padding-bottom: 0; }
.nav-bar .container::-webkit-scrollbar { display: none; }
.nav-link { display: flex; align-items: center; gap: 6px; padding: 12px 20px; font-size: 0.875rem; font-weight: 500; color: rgba(255,255,255,0.70); border-bottom: 3px solid transparent; transition: var(--transition); white-space: nowrap; }
.nav-link i { font-size: 0.875rem; }
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.05); border-bottom-color: rgba(255,255,255,0.20); }
.nav-link.active { color: #fff; border-bottom-color: var(--secondary); background: rgba(255,255,255,0.06); }
/* ===== Hero ===== */
.hero { position: relative; min-height: 520px; display: flex; align-items: center; background: var(--bg-dark); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.35; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.60) 100%); }
.hero .container { position: relative; z-index: 2; padding-top: 60px; padding-bottom: 60px; }
.hero-content { max-width: 720px; }
.hero-content h1 { font-size: 3rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 16px; }
.hero-content h1 i { color: var(--secondary); }
.hero-content p { font-size: 1.125rem; color: rgba(255,255,255,0.75); max-width: 540px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 40px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.10); }
.hero-stat { }
.hero-stat .num { font-size: 1.75rem; font-weight: 800; color: #fff; }
.hero-stat .label { font-size: 0.8125rem; color: rgba(255,255,255,0.55); margin-top: 2px; }
/* ===== 平台简介 ===== */
.intro-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.intro-image img { width: 100%; height: 360px; object-fit: cover; }
.intro-text h3 { font-size: 1.5rem; margin-bottom: 16px; }
.intro-text p { margin-bottom: 12px; }
.intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 20px; }
.intro-feat { display: flex; align-items: center; gap: 10px; font-size: 0.9375rem; color: var(--text-light); }
.intro-feat i { color: var(--secondary); font-size: 1rem; width: 20px; }
/* ===== 核心优势 (数据卡) ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { background: var(--bg-card); border-radius: var(--radius); padding: 32px 24px; text-align: center; box-shadow: var(--shadow); transition: var(--transition); border-top: 4px solid var(--primary); }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-card:nth-child(2) { border-top-color: var(--secondary); }
.stat-card:nth-child(3) { border-top-color: #10b981; }
.stat-card:nth-child(4) { border-top-color: var(--accent); }
.stat-card .icon { font-size: 2rem; color: var(--primary); margin-bottom: 12px; }
.stat-card:nth-child(2) .icon { color: var(--secondary); }
.stat-card:nth-child(3) .icon { color: #10b981; }
.stat-card:nth-child(4) .icon { color: var(--accent); }
.stat-card .num { font-size: 2.25rem; font-weight: 800; color: var(--text); }
.stat-card .label { font-size: 0.9375rem; color: var(--text-light); margin-top: 4px; }
/* ===== 分类入口 ===== */
.category-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; height: 280px; display: flex; align-items: flex-end; }
.category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.category-card:hover img { transform: scale(1.05); }
.category-card .overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(15,23,42,0.80) 0%, rgba(15,23,42,0.20) 100%); }
.category-card .content { position: relative; z-index: 2; padding: 28px 24px; width: 100%; }
.category-card .content h3 { color: #fff; font-size: 1.375rem; font-weight: 700; }
.category-card .content p { color: rgba(255,255,255,0.70); font-size: 0.875rem; margin-bottom: 0; }
.category-card .content .btn { margin-top: 12px; padding: 8px 20px; font-size: 0.8125rem; }
.category-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
/* ===== 最新资讯 (CMS) ===== */
.news-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
.news-card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-card .thumb { width: 100%; height: 200px; object-fit: cover; }
.news-card .body { padding: 20px; }
.news-card .body .meta { display: flex; align-items: center; gap: 12px; font-size: 0.75rem; color: var(--text-muted); margin-bottom: 8px; }
.news-card .body .meta .badge { font-size: 0.625rem; padding: 2px 10px; }
.news-card .body h3 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .body p { font-size: 0.875rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 0; }
.news-card .body .read-more { display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; font-size: 0.8125rem; font-weight: 600; color: var(--primary); }
.empty-news { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-muted); font-size: 1.0625rem; }
/* ===== 使用流程 ===== */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-step { text-align: center; position: relative; }
.process-step .step-num { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; font-weight: 800; color: #fff; background: var(--primary); margin: 0 auto 16px; position: relative; z-index: 2; }
.process-step:nth-child(2) .step-num { background: var(--secondary); }
.process-step:nth-child(3) .step-num { background: #10b981; }
.process-step:nth-child(4) .step-num { background: var(--accent); }
.process-step .step-icon { font-size: 1.75rem; color: var(--primary); margin-bottom: 12px; }
.process-step h4 { font-size: 1.0625rem; margin-bottom: 6px; }
.process-step p { font-size: 0.875rem; color: var(--text-light); margin-bottom: 0; max-width: 200px; margin-left: auto; margin-right: auto; }
.process-step::after { content: ''; position: absolute; top: 26px; left: 60%; width: 80%; height: 2px; background: var(--border); z-index: 1; }
.process-step:last-child::after { display: none; }
/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; font-weight: 600; font-size: 1rem; cursor: pointer; list-style: none; transition: var(--transition); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary); transition: var(--transition); font-size: 0.875rem; }
.faq-item[open] summary i { transform: rotate(180deg); }
.faq-item .answer { padding: 0 24px 18px; font-size: 0.9375rem; color: var(--text-light); line-height: 1.7; }
/* ===== CTA ===== */
.cta-section { background: var(--bg-dark); position: relative; overflow: hidden; }
.cta-section .cta-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.20; }
.cta-section .container { position: relative; z-index: 2; text-align: center; padding-top: 80px; padding-bottom: 80px; }
.cta-section h2 { color: #fff; font-size: 2.25rem; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.65); max-width: 600px; margin: 0 auto 28px; font-size: 1.0625rem; }
.cta-section .btn { font-size: 1rem; padding: 14px 36px; }
/* ===== Footer ===== */
.footer { background: var(--bg-dark); border-top: 1px solid rgba(255,255,255,0.06); padding: 48px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand .logo span { color: rgba(255,255,255,0.80); }
.footer-brand p { font-size: 0.875rem; color: rgba(255,255,255,0.45); max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 0.9375rem; font-weight: 600; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.875rem; color: rgba(255,255,255,0.50); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--secondary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 0.8125rem; color: rgba(255,255,255,0.35); margin-bottom: 0; }
.footer-bottom a { color: rgba(255,255,255,0.40); font-size: 0.8125rem; }
.footer-bottom a:hover { color: var(--secondary); }
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.625rem; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .process-step::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .intro-wrap { grid-template-columns: 1fr; }
  .intro-image img { height: 260px; }
  .hero-content h1 { font-size: 2.25rem; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero { min-height: 420px; }
  .hero-content h1 { font-size: 1.75rem; }
  .hero-content p { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat .num { font-size: 1.375rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .news-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .search-box input { width: 120px; }
  .header-actions .btn span { display: none; }
  .intro-features { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 1.625rem; }
  .nav-link { padding: 10px 14px; font-size: 0.8125rem; }
  .logo { font-size: 1.125rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.375rem; }
  .hero { min-height: 360px; }
  .hero-content h1 { font-size: 1.5rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stats-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .stat-card { padding: 24px 16px; }
  .news-card .thumb { height: 160px; }
  .faq-item summary { padding: 14px 16px; font-size: 0.9375rem; }
  .faq-item .answer { padding: 0 16px 14px; font-size: 0.875rem; }
  .header-actions .search-box { display: none; }
  .nav-bar .container { gap: 0; }
  .nav-link { padding: 10px 12px; font-size: 0.75rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b6b;
  --secondary: #1d3557;
  --secondary-light: #2d4a7a;
  --accent: #fca311;
  --bg-dark: #0d1b2a;
  --bg-darker: #070f1a;
  --bg-card: #1b2a3f;
  --bg-card-hover: #23354f;
  --bg-light: #f8f9fa;
  --text-white: #ffffff;
  --text-light: #e0e6ed;
  --text-muted: #8a9bb5;
  --text-dark: #1a1a2e;
  --border-color: rgba(255,255,255,0.08);
  --border-light: #e2e8f0;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 30px rgba(230,57,70,0.25);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-top-h: 60px;
  --nav-h: 52px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--text-white); font-weight: 700; }
h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p { margin-bottom: 0.8rem; color: var(--text-light); }
::selection { background: var(--primary); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header Top ===== */
.header-top {
  background: var(--bg-darker);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-top-h);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-top .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.5px;
  white-space: nowrap;
}
.logo i { color: var(--primary); font-size: 1.6rem; }
.logo span { color: var(--primary); }
.logo:hover { color: var(--text-white); opacity: 0.9; }
.header-search {
  flex: 1;
  max-width: 320px;
  position: relative;
}
.header-search input {
  width: 100%;
  padding: 8px 36px 8px 14px;
  border-radius: 50px;
  background: rgba(255,255,255,0.06);
  color: var(--text-light);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  font-size: 0.9rem;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search input:focus { border-color: var(--primary); background: rgba(255,255,255,0.1); }
.header-search button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  color: var(--text-muted);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}
.header-search button:hover { color: var(--primary-light); }
.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-cta .btn-download {
  background: var(--primary);
  color: #fff;
  padding: 8px 22px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  box-shadow: var(--shadow-glow);
}
.header-cta .btn-download:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(230,57,70,0.4);
  color: #fff;
}
.header-cta .btn-download i { font-size: 0.85rem; }

/* ===== Nav Bar (Tabs) ===== */
.nav-bar {
  background: var(--bg-darker);
  border-bottom: 1px solid var(--border-color);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  position: sticky;
  top: var(--header-top-h);
  z-index: 999;
  overflow: hidden;
}
.nav-bar .container {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.nav-bar .container::-webkit-scrollbar { display: none; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 50px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
  border: 1px solid transparent;
}
.nav-link i { font-size: 0.85rem; }
.nav-link:hover {
  color: var(--text-white);
  background: rgba(255,255,255,0.05);
  border-color: var(--border-color);
}
.nav-link.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 4px 15px rgba(230,57,70,0.3);
}
.nav-link.active:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* ===== Hero ===== */
.page-hero {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,27,42,0.92) 0%, rgba(13,27,42,0.7) 50%, rgba(230,57,70,0.25) 100%);
  z-index: 1;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 12px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.page-hero h1 i { color: var(--primary); margin-right: 10px; }
.page-hero p {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--text-light);
  max-width: 680px;
  margin: 0 auto;
  opacity: 0.9;
}
.page-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(230,57,70,0.2);
  border: 1px solid rgba(230,57,70,0.3);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--primary-light);
  margin-bottom: 16px;
}

/* ===== Section Common ===== */
.section {
  padding: 70px 0;
}
.section-alt {
  background: var(--bg-darker);
}
.section-title {
  text-align: center;
  margin-bottom: 48px;
}
.section-title h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 12px;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--primary);
  border-radius: 4px;
  margin: 12px auto 0;
}
.section-title p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ===== Overview ===== */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.overview-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.overview-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: var(--transition);
}
.overview-image:hover img { transform: scale(1.03); }
.overview-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,27,42,0.4), transparent);
}
.overview-content h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.overview-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.98rem;
  line-height: 1.8;
}
.overview-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.stat-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 18px 12px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.stat-item:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}
.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  counter-reset: step;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  position: relative;
  transition: var(--transition);
  counter-increment: step;
}
.step-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230,57,70,0.2);
}
.step-card::before {
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(230,57,70,0.3);
}
.step-card .step-icon {
  font-size: 2.2rem;
  color: var(--primary);
  margin-bottom: 16px;
  margin-top: 8px;
}
.step-card h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}
.step-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.feature-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230,57,70,0.15);
}
.feature-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: var(--transition);
}
.feature-card:hover img { transform: scale(1.05); }
.feature-body {
  padding: 20px 22px 24px;
}
.feature-body h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.feature-body h4 i { color: var(--primary); font-size: 1rem; }
.feature-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.feature-tag {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 50px;
  background: rgba(230,57,70,0.1);
  color: var(--primary-light);
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid rgba(230,57,70,0.15);
}

/* ===== Tips ===== */
.tips-list {
  max-width: 800px;
  margin: 0 auto;
}
.tip-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}
.tip-item:last-child { border-bottom: none; }
.tip-item:hover { padding-left: 8px; }
.tip-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(230,57,70,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  border: 1px solid rgba(230,57,70,0.15);
}
.tip-content h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}
.tip-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ===== FAQ ===== */
.faq-grid {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(230,57,70,0.15); }
.faq-question {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-white);
  font-size: 1rem;
  background: none;
  width: 100%;
  text-align: left;
  transition: var(--transition);
}
.faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
.faq-answer p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--bg-darker) 0%, #0f1d30 50%, rgba(230,57,70,0.08) 100%);
  text-align: center;
  padding: 70px 20px;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.cta-section h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 12px;
}
.cta-section p {
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 28px;
  font-size: 1rem;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary, .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(230,57,70,0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(230,57,70,0.4);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 1px solid var(--border-color);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(230,57,70,0.05);
  transform: translateY(-3px);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}
.footer-brand .logo { font-size: 1.3rem; }
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 12px;
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.95rem;
  color: var(--text-white);
  margin-bottom: 14px;
  font-weight: 600;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  color: var(--text-muted);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-col ul li a i { font-size: 0.8rem; width: 16px; }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-bottom: 0;
}
.footer-bottom a {
  color: var(--text-muted);
  font-size: 0.82rem;
}
.footer-bottom a:hover { color: var(--primary-light); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .overview-grid { grid-template-columns: 1fr; gap: 30px; }
  .overview-image img { height: 280px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --header-top-h: 52px; --nav-h: 46px; }
  .header-search { max-width: 180px; }
  .header-cta .btn-download span { display: none; }
  .header-cta .btn-download { padding: 8px 14px; }
  .page-hero { min-height: 240px; padding: 40px 16px; }
  .section { padding: 50px 0; }
  .section-title { margin-bottom: 32px; }
  .steps-grid { grid-template-columns: 1fr; gap: 24px; }
  .features-grid { grid-template-columns: 1fr 1fr; gap: 18px; }
  .overview-stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .stat-item { padding: 14px 8px; }
  .stat-number { font-size: 1.4rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-buttons { flex-direction: column; align-items: center; }
}

@media (max-width: 520px) {
  .header-top .container { gap: 8px; }
  .header-search { max-width: 120px; }
  .header-search input { padding: 6px 30px 6px 10px; font-size: 0.8rem; }
  .logo { font-size: 1.1rem; }
  .logo i { font-size: 1.2rem; }
  .nav-link { padding: 6px 12px; font-size: 0.8rem; }
  .nav-link i { display: none; }
  .page-hero { min-height: 200px; padding: 30px 16px; }
  .page-hero h1 { font-size: 1.6rem; }
  .features-grid { grid-template-columns: 1fr; }
  .overview-stats { grid-template-columns: 1fr; gap: 8px; }
  .footer-grid { grid-template-columns: 1fr; }
  .faq-question { padding: 14px 16px; font-size: 0.92rem; }
  .faq-answer { padding: 0 16px; }
  .faq-item.active .faq-answer { padding: 0 16px 16px; }
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 12px; }
.mt-2 { margin-top: 24px; }
.mb-1 { margin-bottom: 12px; }
.mb-2 { margin-bottom: 24px; }
.gap-sm { gap: 8px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
:root {
  --primary: #0b1a30;
  --primary-light: #112240;
  --primary-dark: #060f1a;
  --accent: #f0b90b;
  --accent-hover: #d4a509;
  --accent-glow: rgba(240, 185, 11, 0.25);
  --bg: #f4f6fa;
  --bg-card: #ffffff;
  --bg-dark: #0b1a30;
  --bg-section: #eef1f7;
  --text: #1a1a2e;
  --text-light: #4a4a6a;
  --text-white: #f0f2f5;
  --text-muted: #7a7a9a;
  --border: #e2e6ee;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-glow: 0 0 30px rgba(240,185,11,0.15);
  --transition: 0.30s cubic-bezier(0.25,0.46,0.45,0.94);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-w: 1200px;
  --header-h: 70px;
  --nav-h: 52px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* ===== header ===== */
.header { background: var(--primary); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 20px rgba(0,0,0,0.25); }
.header-top { 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 { display: flex; align-items: center; gap: 8px; font-size: 1.5rem; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
.logo i { color: var(--accent); font-size: 1.6rem; }
.logo span { color: var(--accent); font-weight: 700; }
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-actions .search-box { display: flex; align-items: center; background: rgba(255,255,255,0.10); border: 1px solid rgba(255,255,255,0.12); border-radius: 40px; padding: 6px 16px 6px 18px; transition: var(--transition); }
.header-actions .search-box:focus-within { background: rgba(255,255,255,0.18); border-color: var(--accent); }
.header-actions .search-box input { background: transparent; border: none; color: #fff; padding: 6px 0; width: 140px; font-size: 0.9rem; }
.header-actions .search-box input::placeholder { color: rgba(255,255,255,0.5); }
.header-actions .search-box button { background: transparent; color: rgba(255,255,255,0.6); cursor: pointer; font-size: 1rem; padding: 4px; transition: var(--transition); }
.header-actions .search-box button:hover { color: var(--accent); }
.header-actions .btn-cta { background: var(--accent); color: var(--primary-dark); font-weight: 700; padding: 8px 22px; border-radius: 40px; font-size: 0.85rem; display: flex; align-items: center; gap: 6px; transition: var(--transition); box-shadow: 0 4px 14px rgba(240,185,11,0.30); }
.header-actions .btn-cta:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,185,11,0.40); }
.mobile-toggle { display: none; background: transparent; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 4px; }
@media (max-width: 768px) {
  .header-top { padding: 0 16px; height: 60px; }
  .logo { font-size: 1.25rem; }
  .header-actions .search-box { display: none; }
  .header-actions .btn-cta { padding: 6px 16px; font-size: 0.8rem; }
  .mobile-toggle { display: block; }
}

/* ===== nav-bar ===== */
.nav-bar { background: var(--primary-light); border-top: 1px solid rgba(255,255,255,0.06); border-bottom: 1px solid rgba(255,255,255,0.06); }
.nav-bar .container { display: flex; align-items: center; gap: 4px; height: var(--nav-h); overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.nav-bar .container::-webkit-scrollbar { display: none; }
.nav-link { display: flex; align-items: center; gap: 6px; padding: 8px 20px; border-radius: 30px; font-size: 0.85rem; font-weight: 500; color: rgba(255,255,255,0.7); white-space: nowrap; transition: var(--transition); }
.nav-link i { font-size: 0.9rem; }
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-link.active { color: var(--primary-dark); background: var(--accent); font-weight: 700; box-shadow: 0 4px 16px rgba(240,185,11,0.30); }
.nav-link.active:hover { background: var(--accent-hover); }
@media (max-width: 768px) {
  .nav-bar .container { gap: 2px; }
  .nav-link { padding: 6px 14px; font-size: 0.8rem; }
}

/* ===== hero article ===== */
.hero-article { position: relative; background: var(--primary-dark); min-height: 320px; display: flex; align-items: center; overflow: hidden; }
.hero-article-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.20; z-index: 0; }
.hero-article-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(11,26,48,0.92) 0%, rgba(6,15,26,0.80) 100%); z-index: 1; }
.hero-article .container { position: relative; z-index: 2; padding: 60px 24px 50px; text-align: center; }
.hero-article .breadcrumb { display: flex; justify-content: center; align-items: center; gap: 10px; font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 20px; }
.hero-article .breadcrumb a { color: rgba(255,255,255,0.6); }
.hero-article .breadcrumb a:hover { color: var(--accent); }
.hero-article .breadcrumb .sep { color: rgba(255,255,255,0.25); }
.hero-article .badge-cat { display: inline-block; background: var(--accent); color: var(--primary-dark); font-weight: 700; font-size: 0.75rem; padding: 4px 16px; border-radius: 40px; letter-spacing: 0.5px; margin-bottom: 16px; }
.hero-article h1 { font-size: 2.6rem; font-weight: 800; color: #fff; line-height: 1.25; max-width: 800px; margin: 0 auto 16px; letter-spacing: -0.5px; }
.hero-article .meta { display: flex; justify-content: center; align-items: center; gap: 20px; flex-wrap: wrap; color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.hero-article .meta i { margin-right: 5px; color: var(--accent); }
@media (max-width: 768px) {
  .hero-article { min-height: 240px; }
  .hero-article .container { padding: 40px 16px 36px; }
  .hero-article h1 { font-size: 1.7rem; }
  .hero-article .meta { gap: 12px; font-size: 0.8rem; flex-wrap: wrap; }
}
@media (max-width: 520px) {
  .hero-article h1 { font-size: 1.4rem; }
}

/* ===== main content ===== */
.main-wrap { padding: 56px 0 80px; }
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; }
.article-body { background: var(--bg-card); border-radius: var(--radius-lg); padding: 40px 44px; box-shadow: var(--shadow); }
.article-body .article-content { font-size: 1.05rem; line-height: 1.85; color: var(--text); }
.article-body .article-content p { margin-bottom: 1.4em; }
.article-body .article-content h2 { font-size: 1.5rem; font-weight: 700; margin: 1.6em 0 0.6em; color: var(--primary); }
.article-body .article-content h3 { font-size: 1.2rem; font-weight: 600; margin: 1.4em 0 0.5em; color: var(--primary); }
.article-body .article-content ul, .article-body .article-content ol { margin: 0 0 1.4em 1.6em; }
.article-body .article-content li { margin-bottom: 0.4em; }
.article-body .article-content img { border-radius: var(--radius); margin: 1.2em 0; box-shadow: var(--shadow); }
.article-body .article-content blockquote { border-left: 4px solid var(--accent); background: var(--bg-section); padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 1.2em 0; color: var(--text-light); font-style: italic; }
.article-body .article-content a { color: var(--accent); font-weight: 600; border-bottom: 1px solid transparent; }
.article-body .article-content a:hover { border-bottom-color: var(--accent); }
.article-body .article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-body .article-tags .tag { background: var(--bg-section); color: var(--text-light); padding: 6px 16px; border-radius: 40px; font-size: 0.8rem; font-weight: 500; transition: var(--transition); }
.article-body .article-tags .tag:hover { background: var(--accent); color: var(--primary-dark); }
.article-body .article-share { display: flex; align-items: center; gap: 12px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.article-body .article-share span { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.article-body .article-share a { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 50%; background: var(--bg-section); color: var(--text-light); font-size: 1rem; transition: var(--transition); }
.article-body .article-share a:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-2px); }
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; gap: 32px; }
  .article-body { padding: 28px 24px; }
}
@media (max-width: 768px) {
  .main-wrap { padding: 32px 0 48px; }
  .article-body { padding: 20px 16px; border-radius: var(--radius); }
  .article-body .article-content { font-size: 0.98rem; }
}

/* ===== sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-card { background: var(--bg-card); border-radius: var(--radius); padding: 24px 22px; box-shadow: var(--shadow); }
.sidebar-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--primary); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.sidebar-card h3 i { color: var(--accent); }
.sidebar-card .side-list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.sidebar-card .side-list li:last-child { border-bottom: none; }
.sidebar-card .side-list a { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--text-light); transition: var(--transition); }
.sidebar-card .side-list a:hover { color: var(--accent); padding-left: 4px; }
.sidebar-card .side-list a i { color: var(--accent); font-size: 0.8rem; }
.sidebar-card .side-cta { display: block; background: linear-gradient(135deg, var(--accent), #f59e0b); color: var(--primary-dark); font-weight: 700; text-align: center; padding: 14px 0; border-radius: 40px; font-size: 0.95rem; margin-top: 12px; transition: var(--transition); box-shadow: 0 4px 16px rgba(240,185,11,0.25); }
.sidebar-card .side-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(240,185,11,0.35); }
@media (max-width: 1024px) {
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
}
@media (max-width: 768px) {
  .article-sidebar { grid-template-columns: 1fr; }
}

/* ===== related section ===== */
.section-related { padding: 56px 0; background: var(--bg-section); }
.section-related .section-title { text-align: center; margin-bottom: 40px; }
.section-related .section-title h2 { font-size: 2rem; font-weight: 800; color: var(--primary); }
.section-related .section-title p { color: var(--text-muted); max-width: 520px; margin: 8px auto 0; font-size: 0.95rem; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card .card-img { height: 180px; background: var(--primary-light); position: relative; overflow: hidden; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-img .badge { position: absolute; top: 12px; left: 12px; background: var(--accent); color: var(--primary-dark); font-weight: 700; font-size: 0.7rem; padding: 3px 12px; border-radius: 40px; }
.related-card .card-body { padding: 18px 20px 22px; }
.related-card .card-body h4 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-body p { font-size: 0.85rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.related-card .card-body .meta { font-size: 0.78rem; color: var(--text-muted); display: flex; gap: 14px; }
.related-card .card-body .meta i { margin-right: 4px; }
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .related-grid { grid-template-columns: 1fr; }
  .section-related .section-title h2 { font-size: 1.5rem; }
}

/* ===== faq ===== */
.section-faq { padding: 56px 0; background: var(--bg-card); }
.section-faq .section-title { text-align: center; margin-bottom: 40px; }
.section-faq .section-title h2 { font-size: 2rem; font-weight: 800; color: var(--primary); }
.section-faq .section-title p { color: var(--text-muted); max-width: 520px; margin: 8px auto 0; font-size: 0.95rem; }
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--accent); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; cursor: pointer; background: transparent; width: 100%; text-align: left; font-size: 1rem; font-weight: 600; color: var(--text); transition: var(--transition); }
.faq-question i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.40s ease, padding 0.40s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }
.faq-answer p { font-size: 0.92rem; color: var(--text-light); line-height: 1.7; }
@media (max-width: 768px) {
  .section-faq .section-title h2 { font-size: 1.5rem; }
  .faq-question { padding: 14px 16px; font-size: 0.92rem; }
  .faq-item.active .faq-answer { padding: 0 16px 14px; }
}

/* ===== cta ===== */
.section-cta { padding: 60px 0; background: var(--primary); position: relative; overflow: hidden; }
.section-cta::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat; opacity: 0.08; z-index: 0; }
.section-cta .container { position: relative; z-index: 1; text-align: center; }
.section-cta h2 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.section-cta p { color: rgba(255,255,255,0.7); font-size: 1.05rem; max-width: 600px; margin: 0 auto 28px; }
.section-cta .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.section-cta .btn-primary { background: var(--accent); color: var(--primary-dark); font-weight: 700; padding: 14px 36px; border-radius: 40px; font-size: 1rem; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); box-shadow: 0 6px 24px rgba(240,185,11,0.30); }
.section-cta .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 32px rgba(240,185,11,0.40); }
.section-cta .btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.25); color: #fff; font-weight: 600; padding: 12px 32px; border-radius: 40px; font-size: 1rem; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); }
.section-cta .btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
@media (max-width: 768px) {
  .section-cta { padding: 40px 0; }
  .section-cta h2 { font-size: 1.6rem; }
  .section-cta p { font-size: 0.95rem; }
  .section-cta .btn-primary, .section-cta .btn-outline { padding: 12px 24px; font-size: 0.9rem; }
}

/* ===== footer ===== */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.75); padding: 56px 0 0; }
.footer .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer .logo { font-size: 1.35rem; margin-bottom: 12px; display: inline-flex; }
.footer .footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
.footer .footer-col h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer .footer-col ul li { margin-bottom: 10px; }
.footer .footer-col ul li a { font-size: 0.88rem; color: rgba(255,255,255,0.55); transition: var(--transition); display: flex; align-items: center; gap: 8px; }
.footer .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer .footer-col ul li a i { color: var(--accent); font-size: 0.8rem; width: 16px; }
.footer .footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; flex-wrap: wrap; gap: 12px; }
.footer .footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.4); }
.footer .footer-bottom a { font-size: 0.8rem; color: rgba(255,255,255,0.25); }
.footer .footer-bottom a:hover { color: var(--accent); }
@media (max-width: 1024px) {
  .footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .footer { padding: 36px 0 0; }
  .footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer .footer-brand p { max-width: 100%; }
  .footer .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== not found ===== */
.not-found { text-align: center; padding: 60px 0; }
.not-found i { font-size: 3rem; color: var(--accent); margin-bottom: 16px; }
.not-found h2 { font-size: 1.8rem; color: var(--primary); margin-bottom: 8px; }
.not-found p { color: var(--text-muted); margin-bottom: 24px; }
.not-found a { display: inline-flex; align-items: center; gap: 8px; background: var(--accent); color: var(--primary-dark); font-weight: 700; padding: 12px 28px; border-radius: 40px; transition: var(--transition); }
.not-found a:hover { background: var(--accent-hover); transform: translateY(-2px); }

/* ===== misc ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }