/* roulang page: index */
:root {
  --primary: #6366F1;
  --primary-dark: #4F46E5;
  --primary-light: #A5B4FC;
  --secondary: #10B981;
  --secondary-dark: #059669;
  --secondary-light: #6EE7B7;
  --bg: #F0F4FF;
  --bg-card: #FFFFFF;
  --bg-alt: #E8EDF7;
  --text: #1E293B;
  --text-weak: #64748B;
  --text-inverse: #FFFFFF;
  --border: #E2E8F0;
  --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);
  --transition: 0.25s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --container: 1200px;
  --nav-height: 72px;
}
*,*::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:color var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
button,.btn{cursor:pointer;font-family:inherit;font-size:1rem;border:none;outline:none;transition:all var(--transition)}
input,textarea,select{font-family:inherit;font-size:1rem;border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:10px 16px;outline:none;transition:border var(--transition);background:var(--bg-card);color:var(--text)}
input:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,0.15)}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
h1{font-size:2.8rem;letter-spacing:-0.02em}
h2{font-size:2rem;letter-spacing:-0.01em;margin-bottom:0.75rem}
h3{font-size:1.4rem}
h4{font-size:1.15rem}
p{margin-bottom:1rem;color:var(--text-weak)}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%}
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.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(--primary);border-radius:4px;margin:12px auto 0}
.section-title p{max-width:600px;margin:0 auto;font-size:1.1rem}

/* 导航 */
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 rgba(226,232,240,0.6);height:var(--nav-height)}
header .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{font-size:1.35rem;font-weight:800;color:var(--primary);letter-spacing:-0.03em;display:flex;align-items:center;gap:8px}
.logo i{font-size:1.5rem;color:var(--secondary)}
.logo span{color:var(--text)}
nav{display:flex;align-items:center;gap:8px}
nav a{font-weight:500;color:var(--text-weak);padding:8px 18px;border-radius:var(--radius-sm);transition:all var(--transition);font-size:0.95rem}
nav a:hover{color:var(--primary);background:rgba(99,102,241,0.06)}
nav a.active{color:var(--primary);background:rgba(99,102,241,0.10);font-weight:600}
.nav-cta{background:var(--primary);color:#fff !important;padding:10px 24px !important;border-radius:var(--radius-sm);font-weight:600;font-size:0.95rem;display:flex;align-items:center;gap:8px;box-shadow:0 4px 14px rgba(99,102,241,0.30)}
.nav-cta:hover{background:var(--primary-dark) !important;transform:translateY(-1px);box-shadow:0 6px 20px rgba(99,102,241,0.40) !important;color:#fff !important}
.nav-toggle{display:none;font-size:1.5rem;background:none;border:none;color:var(--text);cursor:pointer;padding:8px}
@media(max-width:768px){
  .nav-toggle{display:block}
  nav{position:fixed;top:var(--nav-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);display:none;max-height:60vh;overflow-y:auto}
  nav.open{display:flex}
  nav a{padding:12px 16px;width:100%;border-radius:var(--radius-sm)}
  .nav-cta{margin-top:8px;justify-content:center}
}
@media(min-width:769px){nav{display:flex !important}}

/* Hero */
.hero{min-height:88vh;display:flex;align-items:center;position:relative;background:linear-gradient(135deg, #1E1B4B 0%, #312E81 40%, #4338CA 100%);overflow:hidden;padding-top:var(--nav-height)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.25;mix-blend-mode:overlay}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%, rgba(99,102,241,0.30) 0%, transparent 70%)}
.hero .container{position:relative;z-index:2;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,0.10);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,0.15);border-radius:50px;padding:8px 20px;color:#fff;font-size:0.85rem;font-weight:500;margin-bottom:24px}
.hero-badge i{color:var(--secondary-light)}
.hero h1{color:#fff;font-size:3.2rem;max-width:800px;margin:0 auto 20px;text-shadow:0 2px 20px rgba(0,0,0,0.20)}
.hero p{color:rgba(255,255,255,0.80);font-size:1.2rem;max-width:580px;margin:0 auto 36px;line-height:1.7}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{background:var(--secondary);color:#fff;padding:16px 36px;border-radius:var(--radius-sm);font-weight:600;font-size:1.05rem;display:inline-flex;align-items:center;gap:10px;box-shadow:0 6px 24px rgba(16,185,129,0.35);transition:all var(--transition)}
.btn-primary:hover{background:var(--secondary-dark);transform:translateY(-2px);box-shadow:0 10px 32px rgba(16,185,129,0.45);color:#fff}
.btn-outline{background:transparent;color:#fff;padding:16px 36px;border-radius:var(--radius-sm);font-weight:600;font-size:1.05rem;border:2px solid rgba(255,255,255,0.35);display:inline-flex;align-items:center;gap:10px;transition:all var(--transition)}
.btn-outline:hover{background:rgba(255,255,255,0.10);border-color:#fff;transform:translateY(-2px);color:#fff}
.hero-stats{display:flex;justify-content:center;gap:48px;margin-top:56px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat .num{font-size:2.2rem;font-weight:800;color:#fff;line-height:1.2}
.hero-stat .label{font-size:0.9rem;color:rgba(255,255,255,0.60);margin-top:4px}
@media(max-width:768px){
  .hero{min-height:70vh}
  .hero h1{font-size:2rem}
  .hero p{font-size:1rem}
  .hero-stats{gap:24px}
  .hero-stat .num{font-size:1.6rem}
}
@media(max-width:520px){
  .hero h1{font-size:1.6rem}
  .hero-btns{flex-direction:column;align-items:center}
  .btn-primary,.btn-outline{width:100%;justify-content:center}
}

/* 特点 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:var(--bg-card);border-radius:var(--radius);padding:36px 28px;box-shadow:var(--shadow);transition:all var(--transition);text-align:center;border:1px solid var(--border)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feature-icon{width:64px;height:64px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:1.6rem;color:#fff}
.feature-icon.purple{background:linear-gradient(135deg,#6366F1,#8B5CF6)}
.feature-icon.green{background:linear-gradient(135deg,#10B981,#34D399)}
.feature-icon.orange{background:linear-gradient(135deg,#F59E0B,#FBBF24)}
.feature-card h3{font-size:1.2rem;margin-bottom:10px}
.feature-card p{font-size:0.95rem;margin-bottom:0}
@media(max-width:768px){.features-grid{grid-template-columns:1fr;gap:20px}}
@media(min-width:769px)and(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}}

/* 分类入口 */
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.category-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all var(--transition);border:1px solid var(--border);display:flex;flex-direction:column}
.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.category-card img{width:100%;height:200px;object-fit:cover}
.category-card .body{padding:24px 28px;flex:1;display:flex;flex-direction:column}
.category-card .body h3{font-size:1.2rem;margin-bottom:8px}
.category-card .body p{font-size:0.95rem;flex:1;margin-bottom:16px}
.category-card .body .btn-sm{display:inline-flex;align-items:center;gap:6px;background:var(--primary);color:#fff;padding:10px 20px;border-radius:var(--radius-sm);font-weight:500;font-size:0.9rem;align-self:flex-start;transition:all var(--transition)}
.category-card .body .btn-sm:hover{background:var(--primary-dark);transform:translateY(-1px);color:#fff}
@media(max-width:768px){.category-grid{grid-template-columns:1fr}}

/* 资讯列表 */
.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all var(--transition);border:1px solid var(--border);display:flex;flex-direction:column}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.post-card img{width:100%;height:180px;object-fit:cover}
.post-card .body{padding:20px 24px;flex:1;display:flex;flex-direction:column}
.post-card .body .tag{display:inline-block;background:rgba(99,102,241,0.10);color:var(--primary);padding:3px 12px;border-radius:50px;font-size:0.75rem;font-weight:600;margin-bottom:10px;width:fit-content}
.post-card .body h4{font-size:1rem;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .body p{font-size:0.88rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1;margin-bottom:12px}
.post-card .body .meta{display:flex;justify-content:space-between;align-items:center;font-size:0.8rem;color:var(--text-weak);border-top:1px solid var(--border);padding-top:12px;margin-top:auto}
.post-card .body .meta i{margin-right:4px}
.post-empty{grid-column:1/-1;text-align:center;padding:48px 24px;background:var(--bg-card);border-radius:var(--radius);border:1px dashed var(--border);color:var(--text-weak);font-size:1.05rem}
@media(max-width:768px){.posts-grid{grid-template-columns:1fr;gap:20px}}
@media(min-width:769px)and(max-width:1024px){.posts-grid{grid-template-columns:repeat(2,1fr)}}

/* 流程 */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step-item{text-align:center;position:relative;padding:32px 16px}
.step-item:not(:last-child):after{content:'';position:absolute;top:44px;right:-12px;width:24px;height:2px;background:var(--primary-light);display:none}
@media(min-width:769px){.step-item:not(:last-child):after{display:block}}
.step-num{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;margin:0 auto 16px;box-shadow:0 6px 20px rgba(99,102,241,0.30)}
.step-item h4{font-size:1.05rem;margin-bottom:8px}
.step-item p{font-size:0.9rem;margin-bottom:0}
@media(max-width:768px){.steps-grid{grid-template-columns:repeat(2,1fr);gap:16px}}
@media(max-width:520px){.steps-grid{grid-template-columns:1fr}}

/* FAQ */
.faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border);overflow:hidden;transition:all var(--transition)}
.faq-item:hover{border-color:var(--primary-light)}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;font-weight:600;font-size:1rem;color:var(--text);background:none;width:100%;text-align:left;gap:12px}
.faq-q i{transition:transform var(--transition);color:var(--text-weak);font-size:0.9rem}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--primary)}
.faq-a{padding:0 24px 18px;font-size:0.95rem;color:var(--text-weak);line-height:1.7;display:none}
.faq-item.open .faq-a{display:block}

/* CTA */
.cta-section{background:linear-gradient(135deg,#1E1B4B,#312E81);position:relative;overflow:hidden}
.cta-section .cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.15;mix-blend-mode:overlay}
.cta-section .container{position:relative;z-index:2;text-align:center}
.cta-section h2{color:#fff;font-size:2.2rem;margin-bottom:16px}
.cta-section p{color:rgba(255,255,255,0.80);max-width:560px;margin:0 auto 32px;font-size:1.1rem}
.cta-section .btn-primary{background:#fff;color:var(--primary);box-shadow:0 6px 24px rgba(0,0,0,0.20)}
.cta-section .btn-primary:hover{background:var(--primary-light);color:var(--primary-dark)}

/* 页脚 */
footer{background:#0F172A;color:rgba(255,255,255,0.70);padding:48px 0 24px}
footer .container{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
footer h4{color:#fff;font-size:1rem;margin-bottom:16px}
footer p{font-size:0.9rem;color:rgba(255,255,255,0.55);margin-bottom:0}
footer a{color:rgba(255,255,255,0.60);font-size:0.9rem;display:inline-block;margin-bottom:8px;transition:color var(--transition)}
footer a:hover{color:#fff}
footer .social{display:flex;gap:12px;margin-top:16px}
footer .social a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:rgba(255,255,255,0.60);transition:all var(--transition);margin-bottom:0}
footer .social a:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
footer .copyright{grid-column:1/-1;text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,0.08);margin-top:24px;font-size:0.85rem;color:rgba(255,255,255,0.40)}
@media(max-width:768px){
  footer .container{grid-template-columns:1fr 1fr;gap:24px}
  footer .col:first-child{grid-column:1/-1}
}
@media(max-width:520px){footer .container{grid-template-columns:1fr}}

/* 通用工具 */
.text-center{text-align:center}
.mt-24{margin-top:24px}
.mb-0{margin-bottom:0}
.gap-8{gap:8px}
.flex-center{display:flex;align-items:center;justify-content:center}

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #6C5CE7;
  --primary-dark: #5A4BD1;
  --primary-light: #8B7CF0;
  --secondary: #FF6B6B;
  --secondary-dark: #E55A5A;
  --secondary-light: #FF8E8E;
  --accent: #FFD93D;
  --bg: #F8F9FE;
  --bg-alt: #FFFFFF;
  --bg-dark: #1A1A2E;
  --text: #2D2D44;
  --text-light: #6B6B80;
  --text-inverse: #FFFFFF;
  --border: #E8E8F0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(108, 92, 231, 0.10);
  --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.18);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
}

/* ===== Reset & Base ===== */
*, *::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: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
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: 1.1rem; }
p { margin-bottom: 1rem; color: var(--text-light); }
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header & Navigation ===== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  display: flex;
  align-items: center;
}
header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
}
.logo i { color: var(--primary); font-size: 1.6rem; }
.logo span { color: var(--primary); font-weight: 600; }
.logo:hover { color: var(--text); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-toggle:hover { background: var(--border); }
header nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
header nav a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
header nav a i { font-size: 0.9rem; }
header nav a:hover { color: var(--primary); background: rgba(108,92,231,0.08); }
header nav a.active { color: var(--primary); background: rgba(108,92,231,0.12); font-weight: 600; }
header nav a.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 8px 24px;
  border-radius: 50px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(108,92,231,0.25);
}
header nav a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,92,231,0.35); background: linear-gradient(135deg, var(--primary-dark), var(--primary)); }

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 80px 0 60px;
  background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
  min-height: 320px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.article-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;
}
.article-hero .container { position: relative; z-index: 2; }
.article-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
}
.article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
.article-hero .breadcrumb a:hover { color: #fff; }
.article-hero .breadcrumb span { color: rgba(255,255,255,0.9); }
.article-hero .meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 16px;
}
.article-hero .meta-badge i { color: var(--accent); }
.article-hero h1 {
  font-size: 2.6rem;
  color: #fff;
  max-width: 800px;
  line-height: 1.25;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.article-hero .meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}
.article-hero .meta-line span { display: flex; align-items: center; gap: 6px; }
.article-hero .meta-line i { color: var(--accent); }

/* ===== Article Content ===== */
.article-main {
  padding: 48px 0 64px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
}
.article-body {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 40px 44px;
  box-shadow: var(--shadow-card);
}
.article-body .content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text);
}
.article-body .content p { margin-bottom: 1.4rem; color: var(--text); }
.article-body .content h2, .article-body .content h3 { margin-top: 2rem; margin-bottom: 0.8rem; }
.article-body .content ul, .article-body .content ol { margin-bottom: 1.4rem; padding-left: 1.8rem; list-style: disc; }
.article-body .content li { margin-bottom: 0.4rem; color: var(--text-light); }
.article-body .content a { color: var(--primary); text-decoration: underline; }
.article-body .content blockquote {
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  margin: 1.6rem 0;
  background: rgba(108,92,231,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}
.article-body .content img { border-radius: var(--radius-sm); margin: 1.6rem 0; }
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.share-bar span { font-weight: 600; color: var(--text-light); font-size: 0.9rem; }
.share-bar a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text-light);
  font-size: 1.1rem;
  transition: var(--transition);
}
.share-bar a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ===== Tags ===== */
.article-tags {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.article-tags .tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(108,92,231,0.08);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
}
.article-tags .tag:hover { background: var(--primary); color: #fff; }

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.sidebar-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.sidebar-card h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i { color: var(--primary); }
.sidebar-card .rec-item {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.sidebar-card .rec-item:last-child { border-bottom: none; }
.sidebar-card .rec-item:hover { padding-left: 6px; }
.sidebar-card .rec-item img {
  width: 72px;
  height: 56px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--bg);
}
.sidebar-card .rec-item .info { flex: 1; }
.sidebar-card .rec-item .info h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.sidebar-card .rec-item .info h4 a { color: var(--text); }
.sidebar-card .rec-item .info h4 a:hover { color: var(--primary); }
.sidebar-card .rec-item .info .date { font-size: 0.8rem; color: var(--text-light); }
.sidebar-cta {
  background: linear-gradient(135deg, var(--primary), #8B7CF0);
  color: #fff;
  text-align: center;
  padding: 32px 24px;
}
.sidebar-cta h3 { color: #fff; }
.sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 20px; }
.sidebar-cta .btn {
  background: var(--accent);
  color: var(--text);
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.sidebar-cta .btn:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,217,61,0.4); }

/* ===== Recommendations ===== */
.section-rec {
  padding: 64px 0;
  background: var(--bg-alt);
}
.section-rec .section-title {
  text-align: center;
  margin-bottom: 40px;
}
.section-rec .section-title h2 { font-size: 1.8rem; }
.section-rec .section-title p { color: var(--text-light); max-width: 540px; margin: 8px auto 0; }
.rec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.rec-card {
  background: var(--bg);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.rec-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.rec-card .img-wrap {
  position: relative;
  height: 180px;
  overflow: hidden;
  background: var(--border);
}
.rec-card .img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.rec-card:hover .img-wrap img { transform: scale(1.08); }
.rec-card .card-body { padding: 18px 20px 20px; }
.rec-card .card-body .cat-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 12px;
  border-radius: 50px;
  background: rgba(108,92,231,0.1);
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}
.rec-card .card-body h4 { font-size: 1.05rem; font-weight: 600; }
.rec-card .card-body h4 a { color: var(--text); }
.rec-card .card-body h4 a:hover { color: var(--primary); }
.rec-card .card-body .date { font-size: 0.82rem; color: var(--text-light); margin-top: 6px; display: flex; align-items: center; gap: 4px; }

/* ===== FAQ ===== */
.section-faq {
  padding: 64px 0;
  background: var(--bg);
}
.section-faq .section-title { text-align: center; margin-bottom: 40px; }
.section-faq .section-title h2 { font-size: 1.8rem; }
.section-faq .section-title p { color: var(--text-light); max-width: 540px; margin: 8px auto 0; }
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  padding: 0 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.faq-item summary {
  cursor: pointer;
  padding: 18px 0;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary); font-size: 0.9rem; transition: var(--transition); }
.faq-item[open] summary i { transform: rotate(90deg); }
.faq-item .answer {
  padding-bottom: 20px;
  color: var(--text-light);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* ===== CTA Section ===== */
.section-cta {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #8B7CF0 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.section-cta::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;
}
.section-cta .container { position: relative; z-index: 2; }
.section-cta h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
.section-cta p { color: rgba(255,255,255,0.85); font-size: 1.1rem; 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(--text);
  padding: 14px 40px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(255,217,61,0.3);
}
.section-cta .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(255,217,61,0.45); }
.section-cta .btn-secondary {
  background: rgba(255,255,255,0.15);
  color: #fff;
  padding: 14px 40px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 2px solid rgba(255,255,255,0.3);
  transition: var(--transition);
}
.section-cta .btn-secondary:hover { background: rgba(255,255,255,0.25); border-color: rgba(255,255,255,0.6); }

/* ===== Not Found ===== */
.not-found-box {
  text-align: center;
  padding: 80px 24px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  max-width: 600px;
  margin: 0 auto;
}
.not-found-box i { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
.not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
.not-found-box p { color: var(--text-light); margin-bottom: 24px; }
.not-found-box .btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 50px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  transition: var(--transition);
}
.not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== Footer (Shared) ===== */
footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 30px;
}
footer .container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
footer .col h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}
footer .col p { color: rgba(255,255,255,0.6); font-size: 0.9rem; line-height: 1.7; }
footer .col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: var(--transition);
}
footer .col a:hover { color: var(--accent); padding-left: 4px; }
footer .social { display: flex; gap: 12px; margin-top: 16px; }
footer .social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
  font-size: 1.2rem;
  transition: var(--transition);
  padding: 0;
}
footer .social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
footer .copyright {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .rec-grid { grid-template-columns: repeat(2, 1fr); }
  footer .container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  header nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    gap: 4px;
  }
  header nav.open { display: flex; }
  header nav a { padding: 12px 18px; width: 100%; border-radius: var(--radius-sm); }
  header nav a.nav-cta { text-align: center; justify-content: center; }
  .article-hero { padding: 48px 0 40px; min-height: 240px; }
  .article-hero h1 { font-size: 1.8rem; }
  .article-body { padding: 24px 20px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .rec-grid { grid-template-columns: 1fr; }
  .section-rec { padding: 40px 0; }
  .section-faq { padding: 40px 0; }
  .section-cta { padding: 48px 0; }
  .section-cta h2 { font-size: 1.5rem; }
  footer .container { grid-template-columns: 1fr; gap: 32px; }
  .article-hero .meta-line { gap: 12px; font-size: 0.82rem; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .logo { font-size: 1.2rem; }
  .logo i { font-size: 1.2rem; }
  .article-hero h1 { font-size: 1.4rem; }
  .article-body { padding: 16px; }
  .article-body .content { font-size: 0.98rem; }
  .rec-card .img-wrap { height: 140px; }
  .section-cta .btn-primary, .section-cta .btn-secondary { width: 100%; justify-content: center; }
  .faq-item { padding: 0 16px; }
  .faq-item summary { font-size: 0.95rem; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --secondary: #FD79A8;
            --secondary-light: #FDCB6E;
            --accent: #00CEC9;
            --bg: #F8F9FA;
            --bg-alt: #FFFFFF;
            --bg-card: #FFFFFF;
            --text: #2D3436;
            --text-light: #636E72;
            --text-muted: #B2BEC3;
            --border: #E9ECEF;
            --border-light: #F1F3F5;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 30px rgba(108, 92, 231, 0.10);
            --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.18);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: 1rem; 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: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.8rem; color: var(--text-light); }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
        }
        @media (max-width: 520px) {
            h1 { font-size: 1.5rem; }
            h2 { font-size: 1.3rem; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(108, 92, 231, 0.30);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.20);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-cta {
            background: linear-gradient(135deg, var(--secondary), #E17055);
            color: #fff;
            border-color: transparent;
            padding: 14px 34px;
            font-size: 1rem;
        }
        .btn-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 12px 32px rgba(253, 121, 168, 0.35);
        }
        .btn-cta:focus-visible {
            outline: 3px solid var(--secondary-light);
            outline-offset: 2px;
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.1rem;
        }
        @media (max-width: 520px) {
            .btn { padding: 10px 22px; font-size: 0.9rem; }
            .btn-lg { padding: 14px 30px; font-size: 1rem; }
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--primary-light);
            color: #fff;
        }
        .badge-hot {
            background: #FF6B6B;
            color: #fff;
        }
        .badge-new {
            background: var(--accent);
            color: #fff;
        }
        .badge-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text-light);
        }
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-xs);
            font-size: 0.78rem;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ===== 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);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo span {
            color: var(--primary);
            font-weight: 300;
        }
        .logo:hover {
            opacity: 0.85;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav a {
            padding: 8px 16px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-light);
            transition: var(--transition);
            white-space: nowrap;
        }
        nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        nav a:hover {
            background: var(--bg);
            color: var(--primary);
        }
        nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.25);
        }
        nav a.active:hover {
            background: var(--primary-dark);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--secondary), #E17055) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(253, 121, 168, 0.25);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(253, 121, 168, 0.35) !important;
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 6px 10px;
            border-radius: var(--radius-xs);
            background: var(--bg);
        }
        .nav-toggle:hover {
            background: var(--border);
        }
        @media (max-width: 900px) {
            nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 12px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: 0 20px 48px rgba(0,0,0,0.08);
            }
            nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            nav a {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-cta {
                width: 100%;
                text-align: center;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .logo { font-size: 1.15rem; }
            .logo i { font-size: 1.3rem; }
        }

        /* ===== Hero / Banner ===== */
        .hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 60px;
            background: linear-gradient(135deg, rgba(108,92,231,0.06) 0%, rgba(253,121,168,0.06) 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero h1 {
            margin-bottom: 16px;
            color: var(--text);
        }
        .hero h1 span {
            color: var(--primary);
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 32px;
            color: var(--text-light);
        }
        .hero .actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .hero .stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }
        .hero .stat-item {
            text-align: center;
        }
        .hero .stat-item .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
        }
        .hero .stat-item .label {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-top: 2px;
        }
        @media (max-width: 768px) {
            .hero { min-height: 320px; padding: 60px 16px 40px; }
            .hero p { font-size: 1rem; }
            .hero .stats { gap: 24px; }
            .hero .stat-item .num { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .hero { min-height: 280px; padding: 48px 12px 32px; }
            .hero .stats { gap: 16px; }
        }

        /* ===== Section ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 10px;
        }
        .section-title p {
            max-width: 580px;
            margin: 0 auto;
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .section-title .subtitle {
            display: inline-block;
            padding: 4px 18px;
            border-radius: 50px;
            background: rgba(108,92,231,0.10);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.82rem;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-title { margin-bottom: 32px; }
        }

        /* ===== Cards Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        }
        @media (max-width: 520px) {
            .grid-3 { grid-template-columns: 1fr; gap: 16px; }
            .grid-4 { grid-template-columns: 1fr; gap: 16px; }
        }

        /* ===== Gift Card ===== */
        .gift-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .gift-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .gift-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--bg);
        }
        .gift-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .gift-card .card-body .badge-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .gift-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .gift-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 16px;
            flex: 1;
        }
        .gift-card .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .gift-card .card-footer .gift-code {
            font-family: monospace;
            font-size: 0.85rem;
            background: var(--bg);
            padding: 4px 12px;
            border-radius: var(--radius-xs);
            color: var(--text-light);
            border: 1px dashed var(--border);
        }
        .gift-card .card-footer .btn {
            padding: 6px 18px;
            font-size: 0.82rem;
        }
        @media (max-width: 520px) {
            .gift-card .card-body { padding: 16px; }
        }

        /* ===== Category Grid (icon cards) ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 16px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .cat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }
        .cat-card .icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: rgba(108,92,231,0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .cat-card:hover .icon {
            background: var(--primary);
            color: #fff;
        }
        .cat-card h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .cat-card p {
            font-size: 0.82rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .cat-card .count {
            display: inline-block;
            margin-top: 10px;
            font-size: 0.75rem;
            color: var(--text-muted);
            background: var(--bg);
            padding: 2px 12px;
            border-radius: 50px;
        }
        @media (max-width: 900px) {
            .cat-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .cat-card { padding: 20px 12px; }
        }

        /* ===== How it works ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 20px 28px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            left: 16px;
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-card .icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        @media (max-width: 900px) {
            .steps { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .steps { grid-template-columns: 1fr; gap: 16px; }
            .step-card { padding: 24px 16px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            gap: 12px;
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }
        @media (max-width: 520px) {
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
            .faq-answer { padding: 0 16px; font-size: 0.88rem; }
            .faq-item.open .faq-answer { padding: 0 16px 16px; }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #5A4BD1 100%);
            padding: 72px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-section .btn:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            box-shadow: 0 8px 28px rgba(0,0,0,0.15);
        }
        @media (max-width: 768px) {
            .cta-section { padding: 48px 0; }
        }

        /* ===== Footer ===== */
        footer {
            background: #1E1E2E;
            color: rgba(255,255,255,0.85);
            padding: 56px 0 0;
        }
        footer .container {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
        }
        footer .col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        footer .col p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            line-height: 1.7;
        }
        footer .col a {
            display: block;
            padding: 5px 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.65);
            transition: var(--transition);
        }
        footer .col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        footer .social {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }
        footer .social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: rgba(255,255,255,0.7);
            padding: 0;
            transition: var(--transition);
        }
        footer .social a:hover {
            background: var(--primary);
            color: #fff;
            padding: 0;
            transform: translateY(-2px);
        }
        .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0 28px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.45);
            margin-top: 16px;
        }
        @media (max-width: 900px) {
            footer .container { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            footer .container { grid-template-columns: 1fr; gap: 24px; }
            footer .col { text-align: center; }
            footer .social { justify-content: center; }
        }

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

        /* ===== Focus visible global ===== */
        :focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(108,92,231,0.30);
            transition: var(--transition);
            opacity: 0;
            pointer-events: none;
            z-index: 999;
        }
        .back-top.visible {
            opacity: 1;
            pointer-events: all;
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(108,92,231,0.40);
        }
        @media (max-width: 520px) {
            .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 1rem; }
        }

        /* ===== Mobile menu overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.25);
            z-index: 998;
        }
        .nav-overlay.show {
            display: block;
        }
        @media (max-width: 900px) {
            .nav-overlay.show {
                display: block;
            }
        }