/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1a1a3e;
  --primary-light: #2a2a5e;
  --primary-dark: #0f0f2a;
  --accent: #ff4d4d;
  --accent-hover: #e63939;
  --accent-light: rgba(255, 77, 77, 0.1);
  --gold: #ffd700;
  --gold-light: rgba(255, 215, 0, 0.15);
  --bg: #f8f7f4;
  --bg-alt: #ffffff;
  --bg-dark: #0d0d1a;
  --text: #1a1a2e;
  --text-light: #5a5a7a;
  --text-muted: #8a8aaa;
  --text-inverse: #ffffff;
  --border: #e8e6e0;
  --border-light: #f0efe8;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
ul, ol { list-style: none; }
/* ===== Container ===== */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (min-width: 768px) { .container { padding: 0 40px; } }
@media (min-width: 1024px) { .container { padding: 0 60px; } }
/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text); }
h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
h2 { font-size: 2.2rem; letter-spacing: -0.01em; margin-bottom: 0.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }
p { margin-bottom: 1rem; color: var(--text-light); }
.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  position: relative;
  padding-left: 1.5rem;
}
.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0.75rem;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-title { margin-bottom: 0.75rem; }
.section-desc { font-size: 1.1rem; color: var(--text-light); max-width: 640px; margin-bottom: 2.5rem; }
/* ===== Header / Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 768px) { .header-inner { padding: 0 40px; } }
@media (min-width: 1024px) { .header-inner { padding: 0 60px; } }
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
}
.logo span { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 2rem; }
.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 0.25rem 0;
  position: relative;
  transition: var(--transition);
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: var(--transition);
}
.nav a:hover, .nav a.active { color: var(--text); }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a.active { color: var(--accent); font-weight: 600; }
.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.6rem 1.5rem !important;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(255,77,77,0.3); }
.nav-cta::after { display: none !important; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
@media (max-width: 768px) {
  .nav { display: none; position: fixed; top: var(--nav-height); left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 1.5rem 2rem 2rem; gap: 1.25rem; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { width: 100%; text-align: center; }
}
/* ===== Hero ===== */
.hero {
  padding: 140px 0 80px;
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  position: relative;
  color: var(--text-inverse);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,26,0.85) 0%, rgba(26,26,62,0.7) 50%, rgba(0,0,0,0.5) 100%);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 700px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gold-light);
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255,215,0,0.2);
}
.hero h1 { font-size: 3.2rem; color: #fff; margin-bottom: 1.25rem; line-height: 1.15; }
.hero h1 span { color: var(--gold); }
.hero p { font-size: 1.2rem; color: rgba(255,255,255,0.7); margin-bottom: 2rem; max-width: 560px; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--accent);
  color: #fff;
  padding: 0.9rem 2.2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.hero-btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(255,77,77,0.35); color: #fff; }
.hero-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: transparent;
  color: #fff;
  padding: 0.9rem 2.2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  border: 1.5px solid rgba(255,255,255,0.25);
  transition: var(--transition);
  cursor: pointer;
}
.hero-btn-secondary:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat-item { text-align: left; }
.hero-stat-number { font-size: 2.2rem; font-weight: 800; color: var(--gold); line-height: 1; }
.hero-stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 0.25rem; }
@media (max-width: 768px) {
  .hero { padding: 110px 0 60px; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
  .hero-stat-number { font-size: 1.6rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-btn-primary, .hero-btn-secondary { width: 100%; justify-content: center; }
}
/* ===== Section Spacing ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-inverse); }
.section-dark .section-title { color: #fff; }
.section-dark .section-desc { color: rgba(255,255,255,0.6); }
/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 24px; } }
/* ===== Card ===== */
.card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--border); }
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 1.25rem;
}
.card-icon.accent { background: var(--accent); }
.card-icon.primary { background: var(--primary); }
.card-icon.gold { background: var(--gold); color: var(--primary); }
.card h3 { margin-bottom: 0.6rem; font-size: 1.2rem; }
.card p { font-size: 0.95rem; color: var(--text-light); margin-bottom: 0; }
.card-link { display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 600; font-size: 0.9rem; color: var(--accent); margin-top: 1rem; }
/* ===== Feature Card (图文) ===== */
.feature-card {
  display: flex;
  align-items: center;
  gap: 40px;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.feature-card.reverse { flex-direction: row-reverse; }
.feature-img {
  flex: 0 0 260px;
  height: 200px;
  border-radius: var(--radius);
  background: var(--primary-light);
  overflow: hidden;
}
.feature-img img { width: 100%; height: 100%; object-fit: cover; }
.feature-text { flex: 1; }
.feature-text h3 { margin-bottom: 0.75rem; }
.feature-text p { font-size: 0.95rem; margin-bottom: 0; }
@media (max-width: 768px) {
  .feature-card { flex-direction: column; padding: 1.5rem; gap: 20px; }
  .feature-card.reverse { flex-direction: column; }
  .feature-img { flex: none; width: 100%; height: 180px; }
}
/* ===== Cover Card (分类/内容卡片) ===== */
.cover-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.cover-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.cover-card-img {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--primary-light);
}
.cover-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.cover-card:hover .cover-card-img img { transform: scale(1.05); }
.cover-card-body { padding: 1.5rem; }
.cover-card-body h4 { margin-bottom: 0.4rem; font-size: 1.05rem; }
.cover-card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0.5rem; }
.cover-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.2rem 0.8rem;
  border-radius: 50px;
  margin-bottom: 0.6rem;
}
.cover-card .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 1rem; margin-top: 0.5rem; }
/* ===== Steps ===== */
.steps { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 20px; }
.step-item {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  position: relative;
  transition: var(--transition);
}
.step-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}
.step-item h4 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.step-item p { font-size: 0.9rem; margin-bottom: 0; }
.step-arrow {
  position: absolute;
  right: -14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--text-muted);
}
@media (max-width: 1024px) { .steps { grid-template-columns: 1fr 1fr; } .step-arrow { display: none; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }
/* ===== FAQ ===== */
.faq-list { max-width: 800px; }
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1.25rem 0;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  background: none;
  width: 100%;
  text-align: left;
  padding: 0.25rem 0;
  transition: var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question i { font-size: 0.9rem; color: var(--text-muted); transition: var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding-top: 0;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding-top: 1rem;
}
/* ===== CTA ===== */
.cta-block {
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  border-radius: var(--radius-lg);
  padding: 4rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,26,0.88) 0%, rgba(26,26,62,0.75) 100%);
  z-index: 1;
}
.cta-block > * { position: relative; z-index: 2; }
.cta-block h2 { color: #fff; font-size: 2.2rem; margin-bottom: 0.75rem; }
.cta-block p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 520px; margin: 0 auto 1.5rem; }
.cta-block .btn-group { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
@media (max-width: 768px) {
  .cta-block { padding: 2.5rem 1.5rem; }
  .cta-block h2 { font-size: 1.6rem; }
}
/* ===== Data / Metrics ===== */
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.metric-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.metric-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.metric-number { font-size: 2.8rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--gold)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.1; }
.metric-label { font-size: 0.9rem; color: var(--text-light); margin-top: 0.3rem; }
@media (max-width: 1024px) { .metrics-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .metrics-grid { grid-template-columns: 1fr; } }
/* ===== Info List (CMS) ===== */
.info-list { display: grid; gap: 16px; }
.info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  cursor: pointer;
}
.info-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateX(4px); }
.info-item .cat-tag {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.15rem 0.7rem;
  border-radius: 50px;
  white-space: nowrap;
  flex-shrink: 0;
}
.info-item .title { flex: 1; font-weight: 500; font-size: 0.95rem; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.info-item .date { font-size: 0.8rem; color: var(--text-muted); flex-shrink: 0; }
.info-empty { text-align: center; padding: 2rem; color: var(--text-muted); font-size: 0.95rem; }
@media (max-width: 520px) { .info-item { flex-wrap: wrap; gap: 0.5rem; } .info-item .title { width: 100%; } }
/* ===== Tag ===== */
.tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.3rem 1rem;
  border-radius: 50px;
  background: var(--accent-light);
  color: var(--accent);
  transition: var(--transition);
}
.tag:hover { background: var(--accent); color: #fff; }
/* ===== Footer ===== */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.6);
  padding: 3rem 0 2rem;
}
.footer-inner { display: flex; flex-direction: column; gap: 1.5rem; }
.footer-top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-brand { font-size: 1.3rem; font-weight: 700; color: #fff; }
.footer-brand span { color: var(--accent); }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a { font-size: 0.9rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links a:hover { color: var(--gold); }
.footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.08); margin: 1rem 0; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.75rem; font-size: 0.85rem; }
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--gold); }
@media (max-width: 520px) {
  .footer-top, .footer-bottom { flex-direction: column; align-items: flex-start; }
}
/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.gap-1 { gap: 1rem; }
.flex-center { display: flex; align-items: center; justify-content: center; }
/* ===== 分类banner ===== */
.cat-banner {
  padding: 130px 0 60px;
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  position: relative;
  color: #fff;
}
.cat-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,26,0.82) 0%, rgba(26,26,62,0.65) 100%);
  z-index: 1;
}
.cat-banner .container { position: relative; z-index: 2; }
.cat-banner h1 { color: #fff; font-size: 2.4rem; margin-bottom: 0.5rem; }
.cat-banner p { color: rgba(255,255,255,0.6); font-size: 1.05rem; max-width: 540px; }
.cat-breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: rgba(255,255,255,0.4); margin-bottom: 1rem; }
.cat-breadcrumb a { color: rgba(255,255,255,0.4); }
.cat-breadcrumb a:hover { color: var(--gold); }
.cat-breadcrumb span { color: rgba(255,255,255,0.7); }
@media (max-width: 768px) { .cat-banner { padding: 105px 0 40px; } .cat-banner h1 { font-size: 1.8rem; } }
/* ===== 文章详情 ===== */
.article-content { max-width: 820px; margin: 0 auto; }
.article-content h1 { font-size: 2.2rem; margin-bottom: 0.75rem; }
.article-meta { display: flex; gap: 1.5rem; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 2rem; flex-wrap: wrap; }
.article-body { font-size: 1.05rem; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 1.25rem; }
.article-body img { border-radius: var(--radius-sm); margin: 1.5rem 0; }
.article-not-found { text-align: center; padding: 4rem 2rem; }
.article-not-found h2 { font-size: 1.8rem; margin-bottom: 0.75rem; }
.article-not-found p { color: var(--text-muted); }
.article-not-found a { color: var(--accent); font-weight: 600; }
/* ===== Resources ===== */
.resource-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.resource-item {
  display: flex;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  align-items: center;
}
.resource-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.resource-icon { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-light); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.resource-text h4 { font-size: 1rem; margin-bottom: 0.15rem; }
.resource-text p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }
@media (max-width: 768px) { .resource-list { grid-template-columns: 1fr; } }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --accent: #e94560;
            --accent-light: #ff6b81;
            --accent-dark: #c73a52;
            --secondary: #0f3460;
            --bg: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0d1b2a;
            --text: #1a1a2e;
            --text-light: #5a6a7e;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.09);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent-dark); }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: 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: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-sm); }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky; top: 0; z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
        }
        .header-inner {
            max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-sm);
            display: flex; align-items: center; justify-content: space-between;
            height: 68px;
        }
        .logo {
            display: flex; align-items: center; gap: 0.4rem;
            font-size: 1.35rem; font-weight: 800; color: var(--text); letter-spacing: -0.3px;
        }
        .logo:hover { color: var(--text); opacity: 0.85; }
        .logo .logo-icon {
            display: inline-flex; width: 34px; height: 34px; border-radius: var(--radius-sm);
            background: var(--accent); color: #fff; align-items: center; justify-content: center;
            font-size: 1rem; font-weight: 700;
        }
        .logo span { color: var(--accent); }
        .nav { display: flex; align-items: center; gap: 1.8rem; }
        .nav a {
            font-size: 0.95rem; font-weight: 500; color: var(--text-light);
            padding: 0.3rem 0; position: relative; transition: var(--transition);
        }
        .nav a::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2.5px;
            background: var(--accent); border-radius: 4px; transition: var(--transition);
        }
        .nav a:hover { color: var(--text); }
        .nav a:hover::after, .nav a.active::after { width: 100%; }
        .nav a.active { color: var(--text); font-weight: 600; }
        .nav a.nav-cta {
            background: var(--accent); color: #fff; padding: 0.5rem 1.2rem;
            border-radius: 30px; font-weight: 600; font-size: 0.9rem;
            display: flex; align-items: center; gap: 0.4rem;
            box-shadow: 0 4px 14px rgba(233,69,96,0.3);
        }
        .nav a.nav-cta::after { display: none; }
        .nav a.nav-cta:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(233,69,96,0.4); }
        .nav-toggle {
            display: none; flex-direction: column; gap: 5px; background: none; cursor: pointer;
            padding: 6px; border-radius: 6px; transition: var(--transition);
        }
        .nav-toggle span {
            width: 26px; height: 2.5px; background: var(--text); border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: var(--border); }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative; padding: var(--spacing-lg) 0 var(--spacing-md);
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            min-height: 260px; display: flex; align-items: center;
            overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15; mix-blend-mode: overlay;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero h1 {
            color: #fff; font-size: 2.2rem; max-width: 850px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex; flex-wrap: wrap; gap: 0.8rem 1.8rem; margin-top: 1rem;
            color: rgba(255,255,255,0.75); font-size: 0.9rem;
        }
        .article-meta .badge {
            background: var(--accent); color: #fff; padding: 0.2rem 0.9rem;
            border-radius: 20px; font-size: 0.8rem; font-weight: 600;
        }
        .article-meta i { margin-right: 0.3rem; opacity: 0.7; }

        /* ===== Main Content ===== */
        .article-main { padding: var(--spacing-lg) 0 var(--spacing-xl); }
        .article-layout {
            display: grid; grid-template-columns: 1fr 320px; gap: var(--spacing-lg);
        }
        .article-body {
            background: var(--bg-card); border-radius: var(--radius-md);
            padding: 2rem 2.5rem; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .article-body .content {
            font-size: 1.05rem; line-height: 1.85; color: var(--text);
        }
        .article-body .content p { margin-bottom: 1.4rem; color: var(--text-light); }
        .article-body .content h2, .article-body .content h3 {
            margin-top: 2rem; margin-bottom: 0.8rem; color: var(--text);
        }
        .article-body .content ul, .article-body .content ol {
            margin-bottom: 1.4rem; padding-left: 1.4rem; color: var(--text-light);
        }
        .article-body .content li { margin-bottom: 0.5rem; list-style: disc; }
        .article-body .content img { margin: 1.6rem 0; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent); background: var(--bg);
            padding: 1rem 1.6rem; margin: 1.4rem 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light); font-style: italic;
        }
        .article-body .content a { color: var(--accent); font-weight: 500; border-bottom: 1px dashed var(--accent); }
        .article-body .content a:hover { border-bottom-style: solid; }

        /* ===== Sidebar ===== */
        .article-sidebar { display: flex; flex-direction: column; gap: var(--spacing-md); }
        .sidebar-card {
            background: var(--bg-card); border-radius: var(--radius-md);
            padding: 1.6rem; border: 1px solid var(--border); box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem; margin-bottom: 1rem; padding-bottom: 0.6rem;
            border-bottom: 2px solid var(--accent); display: inline-block;
        }
        .sidebar-list { display: flex; flex-direction: column; gap: 0.8rem; }
        .sidebar-list a {
            display: flex; align-items: center; gap: 0.6rem; padding: 0.5rem 0;
            color: var(--text-light); font-size: 0.95rem; border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { color: var(--accent); padding-left: 0.4rem; }
        .sidebar-list a i { color: var(--accent); font-size: 0.8rem; width: 18px; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff; border: none; border-radius: var(--radius-md);
            padding: 1.2rem 1.6rem; text-align: center;
        }
        .sidebar-cta h4 { color: #fff; font-size: 1.1rem; margin-bottom: 0.4rem; }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 1rem; }
        .sidebar-cta .btn-white {
            background: #fff; color: var(--accent); padding: 0.5rem 1.5rem;
            border-radius: 30px; font-weight: 600; display: inline-block;
            transition: var(--transition);
        }
        .sidebar-cta .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center; padding: var(--spacing-xl) var(--spacing-sm);
            background: var(--bg-card); border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border);
        }
        .not-found i { font-size: 3.6rem; color: var(--accent); opacity: 0.5; margin-bottom: 1rem; }
        .not-found h2 { font-size: 1.8rem; margin-bottom: 0.6rem; }
        .not-found p { font-size: 1.05rem; margin-bottom: 1.6rem; }
        .not-found .btn-back {
            display: inline-block; background: var(--accent); color: #fff;
            padding: 0.6rem 2rem; border-radius: 30px; font-weight: 600;
            box-shadow: 0 4px 14px rgba(233,69,96,0.3);
        }
        .not-found .btn-back:hover { background: var(--accent-dark); transform: translateY(-2px); }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary); color: rgba(255,255,255,0.8); padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .footer-inner { display: flex; flex-direction: column; gap: var(--spacing-md); }
        .footer-top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--spacing-sm); }
        .footer-brand {
            display: flex; align-items: center; gap: 0.4rem;
            font-size: 1.2rem; font-weight: 700; color: #fff;
        }
        .footer-brand span { color: var(--accent); }
        .footer-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1.6rem; }
        .footer-links a { color: rgba(255,255,255,0.7); font-size: 0.9rem; font-weight: 400; }
        .footer-links a:hover { color: var(--accent-light); }
        .footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.1); margin: 0.6rem 0; }
        .footer-bottom {
            display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--spacing-xs);
            font-size: 0.85rem; color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--accent-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-sm); }
        }
        @media (max-width: 768px) {
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .header-inner { height: 60px; }
            .nav { display: none; position: absolute; top: 60px; left: 0; right: 0;
                background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
                flex-direction: column; padding: 1rem 1.6rem 1.6rem; gap: 0.6rem;
                border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md);
            }
            .nav.open { display: flex; }
            .nav a { width: 100%; padding: 0.6rem 0; font-size: 1.05rem; }
            .nav a.nav-cta { justify-content: center; margin-top: 0.4rem; }
            .nav-toggle { display: flex; }
            .article-hero { padding: var(--spacing-md) 0; min-height: 200px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-body { padding: 1.2rem 1.2rem; }
            .article-body .content { font-size: 1rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-top { flex-direction: column; align-items: flex-start; }
            .footer-bottom { flex-direction: column; gap: 0.3rem; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.35rem; }
            .article-meta { font-size: 0.8rem; gap: 0.4rem 1rem; }
            .article-body { padding: 0.8rem 0.8rem; }
            .sidebar-card { padding: 1.2rem; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --primary: #C62828;
  --primary-light: #E53935;
  --primary-dark: #8E0000;
  --accent: #F57C00;
  --accent-light: #FFB74D;
  --accent-dark: #E65100;
  --dark: #1E1B2E;
  --dark-light: #2D2B44;
  --bg: #F8F7F4;
  --bg-alt: #EFECE8;
  --bg-card: #FFFFFF;
  --text: #1F1F2E;
  --text-weak: #6B7280;
  --text-light: #9CA3AF;
  --border: #E5E3DF;
  --border-light: #F0EFEC;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-hero: 0 8px 32px rgba(0,0,0,0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
  --space-section: 80px;
  --space-block: 48px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--dark); }
h1 { font-size: 2.8rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }
p { margin-bottom: 1rem; color: var(--text-weak); }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-height);
  transition: var(--transition);
}
.header:hover { background: rgba(255,255,255,0.98); }
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.5px;
}
.logo-icon {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
}
.logo span { color: var(--accent); }
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-weak);
  transition: var(--transition);
  position: relative;
}
.nav a:hover {
  color: var(--primary);
  background: rgba(198,40,40,0.06);
}
.nav a.active {
  color: var(--primary);
  background: rgba(198,40,40,0.10);
  font-weight: 600;
}
.nav a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  border-radius: 4px;
  background: var(--primary);
}
.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(198,40,40,0.30);
}
.nav-cta:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(198,40,40,0.35) !important;
  color: #fff !important;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: var(--dark);
  border-radius: 4px;
  transition: var(--transition);
}

/* ===== Hero / Banner ===== */
.page-hero {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  position: relative;
  overflow: hidden;
  min-height: 380px;
  display: flex;
  align-items: center;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}
.page-hero::after {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245,124,0,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(245,124,0,0.18);
  color: var(--accent-light);
  padding: 6px 16px;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 18px;
  border: 1px solid rgba(245,124,0,0.25);
}
.hero-badge i { font-size: 0.75rem; }
.page-hero h1 {
  color: #fff;
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 16px;
}
.page-hero h1 span { color: var(--accent-light); }
.page-hero p {
  color: rgba(255,255,255,0.75);
  font-size: 1.15rem;
  max-width: 600px;
  margin-bottom: 28px;
  line-height: 1.6;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 12px;
}
.hero-stat-item {
  display: flex;
  flex-direction: column;
}
.hero-stat-item .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.hero-stat-item .label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 16px 0 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border-light);
}
.breadcrumb-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-weak);
}
.breadcrumb a { color: var(--text-weak); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-light); font-size: 0.75rem; }

/* ===== Section Common ===== */
.section {
  padding: var(--space-section) 0;
}
.section-alt { background: var(--bg-alt); }
.section-card { background: var(--bg-card); }
.section-title {
  text-align: center;
  margin-bottom: 12px;
}
.section-title h2 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--dark);
}
.section-title .sub {
  font-size: 1.05rem;
  color: var(--text-weak);
  max-width: 600px;
  margin: 8px auto 0;
}
.section-divider {
  width: 60px;
  height: 4px;
  background: var(--accent);
  border-radius: 4px;
  margin: 16px auto 0;
}

/* ===== Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.step-number {
  display: inline-flex;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: var(--transition);
}
.step-card:hover .step-number { background: var(--accent); transform: scale(1.05); }
.step-card h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--dark); }
.step-card p { font-size: 0.92rem; margin-bottom: 0; color: var(--text-weak); }
.step-arrow {
  position: absolute;
  right: -18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 1.2rem;
  display: none;
}
.steps-grid .step-card:not(:last-child) .step-arrow { display: block; }
@media (max-width: 1024px) {
  .step-arrow { display: none !important; }
}

/* ===== Feature Cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px 28px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.feature-icon {
  display: inline-flex;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(198,40,40,0.08);
  color: var(--primary);
  font-size: 1.5rem;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
}
.feature-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.92rem; margin-bottom: 0; color: var(--text-weak); }

/* ===== Tips / List ===== */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.tip-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-card);
  padding: 24px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.tip-item:hover {
  box-shadow: var(--shadow);
  border-color: transparent;
  transform: translateX(4px);
}
.tip-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(245,124,0,0.10);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}
.tip-content h4 { font-size: 1.05rem; margin-bottom: 4px; color: var(--dark); }
.tip-content p { font-size: 0.9rem; margin-bottom: 0; color: var(--text-weak); }

/* ===== Content / Article Cards ===== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.article-cover {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition);
}
.article-card:hover .article-cover { transform: scale(1.03); }
.article-body { padding: 22px 24px 26px; }
.article-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(198,40,40,0.08);
  color: var(--primary);
  margin-bottom: 10px;
}
.article-body h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--dark); }
.article-body p { font-size: 0.9rem; color: var(--text-weak); margin-bottom: 14px; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-light);
}
.article-meta i { margin-right: 4px; }

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 48px auto 0;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border); }
.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark);
  cursor: pointer;
  transition: var(--transition);
  gap: 16px;
}
.faq-question:hover { color: var(--primary); }
.faq-question i {
  font-size: 0.85rem;
  color: var(--text-light);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-weak);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer {
  max-height: 260px;
  padding: 0 24px 22px;
}
.faq-answer p { margin-bottom: 0; }

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}
.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-content { position: relative; z-index: 2; }
.cta-content h2 {
  color: #fff;
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-content p {
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto 30px;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: var(--accent);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(245,124,0,0.35);
}
.cta-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(245,124,0,0.40);
  color: #fff;
}
.cta-btn i { font-size: 1rem; }

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.65);
  padding: 48px 0 32px;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-brand {
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  gap: 6px;
}
.footer-brand span { color: var(--accent); }
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 0.92rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent-light); }
.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin: 28px 0 20px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .page-hero h1 { font-size: 2.4rem; }
  .hero-stats { gap: 24px; }
  .hero-stat-item .num { font-size: 1.5rem; }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; --space-section: 48px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
  .nav a.active::after { display: none; }
  .nav-cta { justify-content: center; margin-top: 8px; }
  .nav-toggle { display: flex; }
  .page-hero { min-height: 300px; padding-top: calc(var(--header-height) + 24px); padding-bottom: 40px; }
  .page-hero h1 { font-size: 1.9rem; }
  .page-hero p { font-size: 1rem; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .step-arrow { display: none !important; }
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
  .tips-grid { grid-template-columns: 1fr; gap: 16px; }
  .articles-grid { grid-template-columns: 1fr; gap: 20px; }
  .section-title h2 { font-size: 1.7rem; }
  .cta-content h2 { font-size: 1.7rem; }
  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .page-hero h1 { font-size: 1.6rem; }
  .hero-stats { gap: 16px; }
  .hero-stat-item .num { font-size: 1.3rem; }
  .step-card { padding: 24px 20px; }
  .feature-card { padding: 24px 20px; }
  .tip-item { padding: 18px 20px; flex-direction: column; }
  .article-body { padding: 18px 18px 22px; }
  .faq-question { padding: 16px 18px; font-size: 0.95rem; }
  .cta-btn { padding: 14px 28px; font-size: 1rem; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

/* ===== Utility ===== */
.text-accent { color: var(--accent); }
.text-primary { color: var(--primary); }
.mt-0 { margin-top: 0; }