/* roulang page: index */
:root {
  --primary: #6C5CE7;
  --primary-dark: #5A4BD1;
  --primary-light: #A29BFE;
  --secondary: #FD79A8;
  --accent: #FDCB6E;
  --bg-body: #0F0E1A;
  --bg-card: #1A1930;
  --bg-elevated: #242242;
  --text-primary: #F5F3FF;
  --text-secondary: #C8C4E8;
  --text-weak: #8B86B5;
  --border: rgba(108, 92, 231, 0.2);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-hover: 0 16px 48px rgba(108,92,231,0.25);
  --transition: 0.3s cubic-bezier(0.22,1,0.36,1);
  --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);background:var(--bg-body);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
button,input,textarea{font-family:inherit;font-size:inherit}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* ===== Header / Nav ===== */
header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--nav-height);
  background:rgba(15,14,26,0.55);
  backdrop-filter:blur(20px) saturate(1.4);
  -webkit-backdrop-filter:blur(20px) saturate(1.4);
  border-bottom:1px solid rgba(108,92,231,0.15);
  transition:background var(--transition),box-shadow var(--transition);
}
header.scrolled{
  background:rgba(15,14,26,0.88);
  box-shadow:0 4px 30px rgba(0,0,0,0.5);
}
nav{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;max-width:var(--container);margin:0 auto;padding:0 24px;
}
.logo{font-size:1.5rem;font-weight:700;color:var(--text-primary);letter-spacing:-0.5px;display:flex;align-items:center;gap:8px}
.logo span{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;-webkit-text-fill-color:#fff}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links a{
  color:var(--text-secondary);font-size:0.9rem;font-weight:500;
  padding:6px 0;position:relative;transition:color var(--transition);
}
.nav-links a::after{
  content:'';position:absolute;left:0;bottom:-2px;width:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  transition:width var(--transition);border-radius:2px;
}
.nav-links a:hover,.nav-links a.active{color:var(--text-primary)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff!important;padding:8px 20px!important;border-radius:100px;
  font-weight:600;font-size:0.85rem;transition:transform var(--transition),box-shadow var(--transition);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(108,92,231,0.35);color:#fff!important}
.nav-cta::after{display:none!important}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.nav-toggle span{width:24px;height:2px;background:var(--text-primary);border-radius:2px;transition:var(--transition)}
.nav-toggle.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .nav-links{
    position:fixed;top:var(--nav-height);left:0;right:0;
    flex-direction:column;gap:0;padding:16px 24px;
    background:rgba(15,14,26,0.96);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
    transform:translateY(-120%);opacity:0;pointer-events:none;
    transition:var(--transition);border-radius:0 0 var(--radius) var(--radius);
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-links a{padding:14px 0;border-bottom:1px solid rgba(108,92,231,0.06)}
  .nav-links a:last-child{border-bottom:none}
  .nav-cta{margin-top:8px;justify-content:center}
}

/* ===== Hero ===== */
.hero{
  min-height:100vh;display:flex;align-items:center;position:relative;
  background:url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding:120px 0 80px;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(15,14,26,0.88) 0%,rgba(15,14,26,0.6) 50%,rgba(108,92,231,0.2) 100%);
  z-index:1;
}
.hero::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:200px;
  background:linear-gradient(to top,var(--bg-body),transparent);z-index:1;
}
.hero-content{position:relative;z-index:2;max-width:720px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(108,92,231,0.15);border:1px solid rgba(108,92,231,0.25);
  padding:6px 16px;border-radius:100px;font-size:0.8rem;color:var(--primary-light);margin-bottom:20px;
}
.hero h1{font-size:3.5rem;font-weight:800;line-height:1.1;margin-bottom:20px;letter-spacing:-1px}
.hero h1 span{background:linear-gradient(135deg,var(--primary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.15rem;color:var(--text-secondary);max-width:560px;margin-bottom:32px;line-height:1.7}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 32px;border-radius:100px;font-weight:600;font-size:0.95rem;
  transition:var(--transition);cursor:pointer;border:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;box-shadow:0 4px 20px rgba(108,92,231,0.3);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(108,92,231,0.4);color:#fff}
.btn-secondary{
  background:rgba(255,255,255,0.06);color:var(--text-primary);
  border:1px solid rgba(255,255,255,0.1);
}
.btn-secondary:hover{background:rgba(255,255,255,0.1);transform:translateY(-3px);color:var(--text-primary)}
.hero-stats{
  display:flex;gap:40px;margin-top:48px;padding-top:32px;
  border-top:1px solid rgba(255,255,255,0.06);
}
.hero-stat h3{font-size:1.8rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-stat p{font-size:0.85rem;color:var(--text-weak);margin:0}
@media(max-width:768px){
  .hero h1{font-size:2.2rem}
  .hero p{font-size:1rem}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .hero-stat h3{font-size:1.4rem}
}
@media(max-width:520px){
  .hero h1{font-size:1.8rem}
  .hero-actions{flex-direction:column}
  .btn{width:100%;justify-content:center}
}

/* ===== Section ===== */
.section{padding:80px 0}
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{font-size:2.2rem;font-weight:700;margin-bottom:12px;letter-spacing:-0.5px}
.section-header p{color:var(--text-secondary);font-size:1.05rem;max-width:560px;margin:0 auto}
.section-header .badge{
  display:inline-block;background:rgba(108,92,231,0.12);color:var(--primary-light);
  padding:4px 16px;border-radius:100px;font-size:0.8rem;font-weight:500;margin-bottom:12px;
}
@media(max-width:768px){.section-header h2{font-size:1.7rem}.section{padding:56px 0}}

/* ===== Feature Cards ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:36px 28px;transition:var(--transition);position:relative;overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  opacity:0;transition:var(--transition);
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(108,92,231,0.3)}
.feature-card:hover::before{opacity:1}
.feature-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:20px}
.feature-card h3{font-size:1.15rem;font-weight:600;margin-bottom:10px}
.feature-card p{color:var(--text-secondary);font-size:0.9rem;line-height:1.6}
@media(max-width:768px){.features-grid{grid-template-columns:1fr;gap:16px}}

/* ===== Category Section ===== */
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.category-card{
  border-radius:var(--radius);overflow:hidden;position:relative;
  background:var(--bg-card);border:1px solid var(--border);
  transition:var(--transition);cursor:pointer;
}
.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(108,92,231,0.25)}
.category-card img{width:100%;height:200px;object-fit:cover;transition:var(--transition)}
.category-card:hover img{transform:scale(1.03)}
.category-card-body{padding:20px 24px 24px}
.category-card-body h3{font-size:1.1rem;font-weight:600;margin-bottom:6px}
.category-card-body p{color:var(--text-secondary);font-size:0.85rem;margin-bottom:12px}
.category-tag{display:inline-flex;align-items:center;gap:6px;font-size:0.78rem;color:var(--primary-light);background:rgba(108,92,231,0.1);padding:4px 12px;border-radius:100px}
@media(max-width:768px){.category-grid{grid-template-columns:1fr}}

/* ===== News / CMS List ===== */
.news-list{display:grid;grid-template-columns:1fr;gap:16px}
.news-item{
  display:flex;align-items:flex-start;gap:20px;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:20px 24px;transition:var(--transition);
}
.news-item:hover{transform:translateX(4px);border-color:rgba(108,92,231,0.25);box-shadow:var(--shadow)}
.news-item .news-meta{display:flex;gap:12px;align-items:center;font-size:0.8rem;color:var(--text-weak);margin-bottom:6px;flex-wrap:wrap}
.news-item .news-cat{color:var(--primary-light);background:rgba(108,92,231,0.1);padding:2px 12px;border-radius:100px;font-size:0.75rem}
.news-item h3{font-size:1rem;font-weight:600;margin-bottom:6px}
.news-item h3 a{color:var(--text-primary);transition:color var(--transition)}
.news-item h3 a:hover{color:var(--primary-light)}
.news-item p{color:var(--text-secondary);font-size:0.85rem;line-height:1.5}
.news-empty{padding:40px;text-align:center;color:var(--text-weak);background:var(--bg-card);border-radius:var(--radius);border:1px dashed var(--border)}
@media(max-width:520px){.news-item{flex-direction:column;gap:10px;padding:16px}}

/* ===== Stats / Numbers ===== */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{
  text-align:center;padding:32px 16px;background:var(--bg-card);
  border-radius:var(--radius);border:1px solid var(--border);transition:var(--transition);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.stat-number{font-size:2.4rem;font-weight:800;background:linear-gradient(135deg,var(--primary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{color:var(--text-secondary);font-size:0.85rem;margin-top:6px}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}}
@media(max-width:520px){.stats-grid{grid-template-columns:1fr 1fr}}

/* ===== Featured Picks (coverpic) ===== */
.picks-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pick-card{
  border-radius:var(--radius);overflow:hidden;
  background:var(--bg-card);border:1px solid var(--border);
  transition:var(--transition);
}
.pick-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(108,92,231,0.25)}
.pick-card img{width:100%;height:180px;object-fit:cover;transition:var(--transition)}
.pick-card:hover img{transform:scale(1.02)}
.pick-body{padding:18px 20px 22px}
.pick-body h3{font-size:1rem;font-weight:600;margin-bottom:6px}
.pick-body p{color:var(--text-secondary);font-size:0.82rem;line-height:1.5;margin-bottom:10px}
.pick-body .pick-meta{font-size:0.75rem;color:var(--text-weak);display:flex;gap:12px}
.pick-badge{display:inline-block;background:linear-gradient(135deg,var(--secondary),#E84393);color:#fff;font-size:0.7rem;padding:2px 10px;border-radius:100px;font-weight:600}
@media(max-width:768px){.picks-grid{grid-template-columns:1fr;gap:16px}}
@media(max-width:520px){.picks-grid{grid-template-columns:1fr}}

/* ===== FAQ ===== */
.faq-grid{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);
  overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:rgba(108,92,231,0.2)}
.faq-q{
  padding:18px 24px;display:flex;justify-content:space-between;align-items:center;
  cursor:pointer;font-weight:500;font-size:0.95rem;transition:var(--transition);
  user-select:none;
}
.faq-q:hover{color:var(--primary-light)}
.faq-q .icon{font-size:1.2rem;transition:var(--transition);color:var(--text-weak)}
.faq-item.open .faq-q .icon{transform:rotate(180deg);color:var(--primary-light)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height 0.4s ease, padding 0.3s ease;
  padding:0 24px;color:var(--text-secondary);font-size:0.9rem;line-height:1.7;
}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 20px}

/* ===== CTA ===== */
.cta-section{
  background:linear-gradient(135deg,rgba(108,92,231,0.08),rgba(253,121,168,0.05));
  border:1px solid rgba(108,92,231,0.1);
  border-radius:var(--radius-lg);
  padding:64px 48px;text-align:center;position:relative;overflow:hidden;
}
.cta-section::before{
  content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;
  background:radial-gradient(circle at 30% 50%,rgba(108,92,231,0.06),transparent 60%);
  pointer-events:none;
}
.cta-section h2{font-size:2rem;font-weight:700;margin-bottom:12px}
.cta-section p{color:var(--text-secondary);font-size:1.05rem;margin-bottom:28px;max-width:500px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
@media(max-width:768px){
  .cta-section{padding:40px 24px}
  .cta-section h2{font-size:1.5rem}
}

/* ===== Footer ===== */
footer{
  border-top:1px solid var(--border);padding:48px 0 24px;margin-top:40px;
  background:var(--bg-card);
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-brand .logo{margin-bottom:12px}
.footer-brand p{color:var(--text-secondary);font-size:0.85rem;line-height:1.6;max-width:320px}
.footer-col h4{font-size:0.9rem;font-weight:600;margin-bottom:16px;color:var(--text-primary)}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul a{color:var(--text-secondary);font-size:0.85rem;transition:color var(--transition)}
.footer-col ul a:hover{color:var(--primary-light)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:20px;margin-top:24px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  font-size:0.8rem;color:var(--text-weak);
}
.footer-bottom a{color:var(--text-weak)}
.footer-bottom a:hover{color:var(--primary-light)}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:24px}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr;gap:20px}.footer-bottom{flex-direction:column;text-align:center}}

/* ===== Back to top ===== */
.back-top{
  position:fixed;bottom:32px;right:32px;z-index:999;
  width:48px;height:48px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;border:none;cursor:pointer;font-size:1.2rem;
  box-shadow:0 4px 20px rgba(108,92,231,0.3);
  transition:var(--transition);opacity:0;visibility:hidden;transform:translateY(20px);
  display:flex;align-items:center;justify-content:center;
}
.back-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-4px);box-shadow:0 8px 32px rgba(108,92,231,0.4)}

/* ===== Utility ===== */
.text-gradient{background:linear-gradient(135deg,var(--primary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-light: #a29bfe;
            --primary-dark: #4a3db8;
            --secondary: #fd79a8;
            --accent: #00cec9;
            --bg-dark: #0f0e17;
            --bg-card: #1a1932;
            --bg-section: #12102a;
            --bg-light: #f8f7ff;
            --text-primary: #f0edff;
            --text-secondary: #b8b0e0;
            --text-muted: #7a74a0;
            --border-color: rgba(108, 92, 231, 0.2);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 5rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 4px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== 导航 ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(15, 14, 23, 0.72);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        #header.scrolled {
            background: rgba(15, 14, 23, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        #header nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        #header .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            transition: var(--transition);
        }
        #header .logo:hover {
            color: var(--primary-light);
        }
        #header .logo .logo-icon {
            font-size: 1.7rem;
            color: var(--secondary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-links li a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--secondary);
            border-radius: 4px;
            transition: transform 0.3s ease;
        }
        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.08);
        }
        .nav-links li a.active {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.12);
        }
        .nav-links li a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-links li a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            margin-left: 0.75rem;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .nav-links li a.nav-cta::after {
            display: none;
        }
        .nav-links li a.nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.45);
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            gap: 5px;
            transition: var(--transition);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero / Banner ===== */
        .banner {
            position: relative;
            padding: 8rem 0 4rem;
            min-height: 320px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-card) 100%);
            overflow: hidden;
        }
        .banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 14, 23, 0.85) 0%, rgba(26, 25, 50, 0.7) 100%);
            z-index: 1;
        }
        .banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .banner h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, var(--text-primary) 30%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1rem;
        }
        .banner p {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .banner .badge-group {
            display: flex;
            justify-content: center;
            gap: 0.75rem;
            flex-wrap: wrap;
            margin-top: 1.75rem;
        }
        .banner .badge-group .badge {
            padding: 0.35rem 1.1rem;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 500;
            background: rgba(108, 92, 231, 0.18);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            backdrop-filter: blur(8px);
        }
        .banner .badge-group .badge.hot {
            background: rgba(253, 121, 168, 0.2);
            border-color: rgba(253, 121, 168, 0.3);
            color: var(--secondary);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-dark {
            background: var(--bg-card);
        }

        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .accent-line {
            display: inline-block;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin-top: 0.75rem;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(108, 92, 231, 0.25);
        }
        .card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img {
            transform: scale(1.03);
        }
        .card .card-body {
            padding: 1.5rem 1.5rem 1.75rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card .card-tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 50px;
            background: rgba(108, 92, 231, 0.15);
            color: var(--primary-light);
            margin-bottom: 0.6rem;
            align-self: flex-start;
            border: 1px solid rgba(108, 92, 231, 0.15);
        }
        .card .card-tag.hot {
            background: rgba(253, 121, 168, 0.15);
            color: var(--secondary);
            border-color: rgba(253, 121, 168, 0.2);
        }
        .card .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .card .card-title a {
            color: inherit;
        }
        .card .card-title a:hover {
            color: var(--primary-light);
        }
        .card .card-desc {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 1rem;
            flex: 1;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 0.85rem;
            margin-top: auto;
        }
        .card .card-meta span {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.7rem;
            margin-top: 0.5rem;
        }
        .tag-cloud .tag {
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.88rem;
            font-weight: 500;
            background: rgba(108, 92, 231, 0.08);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .tag-cloud .tag:hover {
            background: rgba(108, 92, 231, 0.2);
            color: var(--text-primary);
            border-color: rgba(108, 92, 231, 0.3);
            transform: translateY(-2px);
        }
        .tag-cloud .tag.hot {
            background: rgba(253, 121, 168, 0.12);
            border-color: rgba(253, 121, 168, 0.25);
            color: var(--secondary);
        }
        .tag-cloud .tag.hot:hover {
            background: rgba(253, 121, 168, 0.22);
        }

        /* ===== 子分类区块 ===== */
        .subcat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }
        .subcat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 1.75rem 1.5rem;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: default;
        }
        .subcat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: var(--shadow-hover);
        }
        .subcat-card .icon {
            font-size: 2.2rem;
            margin-bottom: 0.75rem;
            display: block;
        }
        .subcat-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
        }
        .subcat-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== 数据/统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            text-align: center;
        }
        .stat-item {
            padding: 1.75rem 1rem;
            background: rgba(108, 92, 231, 0.06);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(108, 92, 231, 0.1);
            border-color: rgba(108, 92, 231, 0.2);
        }
        .stat-item .num {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem 1.75rem;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            background: rgba(108, 92, 231, 0.06);
        }
        .faq-question .faq-icon {
            font-size: 1.3rem;
            color: var(--primary-light);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 1rem;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.75rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.75rem 1.5rem;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark), var(--bg-card) 80%);
            border-radius: var(--radius-lg);
            padding: 3.5rem 3rem;
            text-align: center;
            border: 1px solid rgba(108, 92, 231, 0.15);
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-block .container {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .cta-block p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 1.75rem;
        }
        .cta-block .btn-group {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(108, 92, 231, 0.5);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-outline:hover {
            background: rgba(108, 92, 231, 0.1);
            border-color: var(--primary-light);
            color: var(--text-primary);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 0.45rem 1.25rem;
            font-size: 0.85rem;
        }

        /* ===== 分页 ===== */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.5rem;
            margin-top: 3rem;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 0.75rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .pagination a:hover {
            background: rgba(108, 92, 231, 0.12);
            color: var(--text-primary);
            border-color: rgba(108, 92, 231, 0.25);
        }
        .pagination .current {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-color: transparent;
            font-weight: 700;
        }
        .pagination .dots {
            background: transparent;
            border: none;
            color: var(--text-muted);
        }

        /* ===== 页脚 ===== */
        footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-light);
            padding: 4rem 0 2rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        .footer-brand .logo {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-brand .logo .logo-icon {
            color: var(--secondary);
            font-size: 1.6rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }
        .footer-col ul li {
            margin-bottom: 0.6rem;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 2rem;
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .subcat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .banner h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --spacing-section: 3.5rem;
            }

            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15, 14, 23, 0.96);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.25rem 1.5rem;
                gap: 0.35rem;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-links li a {
                padding: 0.7rem 1rem;
                font-size: 1rem;
                width: 100%;
                text-align: center;
            }
            .nav-links li a.nav-cta {
                margin-left: 0;
                margin-top: 0.5rem;
            }
            .nav-toggle {
                display: flex;
            }

            .banner {
                padding: 6rem 0 3rem;
                min-height: 280px;
            }
            .banner h1 {
                font-size: 1.9rem;
            }
            .banner p {
                font-size: 1rem;
            }

            .section-header h2 {
                font-size: 1.7rem;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .subcat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.9rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.9rem;
            }
            .stat-item .num {
                font-size: 2rem;
            }

            .cta-block {
                padding: 2.5rem 1.5rem;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.75rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .banner h1 {
                font-size: 1.6rem;
            }
            .banner .badge-group .badge {
                font-size: 0.75rem;
                padding: 0.25rem 0.85rem;
            }
            .subcat-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .card .card-body {
                padding: 1.2rem 1.2rem 1.4rem;
            }
            .cta-block .btn-group {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-block .btn {
                justify-content: center;
            }
            .pagination a,
            .pagination span {
                min-width: 34px;
                height: 34px;
                font-size: 0.82rem;
            }
        }

        /* ===== 加载过渡 ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in:nth-child(2) {
            animation-delay: 0.1s;
        }
        .fade-in:nth-child(3) {
            animation-delay: 0.2s;
        }
        .fade-in:nth-child(4) {
            animation-delay: 0.3s;
        }
        .fade-in:nth-child(5) {
            animation-delay: 0.4s;
        }
        .fade-in:nth-child(6) {
            animation-delay: 0.5s;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --secondary: #f59e0b;
  --secondary-dark: #d97706;
  --accent: #ec4899;
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --bg-soft: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #f1f5f9;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.09), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.08);
  --transition: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}
/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--text-primary);background:var(--bg-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
a:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
button,input,textarea,select{font-family:inherit;font-size:inherit;line-height:inherit}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.25;font-weight:700;color:var(--text-primary)}
h1{font-size:clamp(1.75rem, 4vw, 2.75rem);letter-spacing:-0.02em}
h2{font-size:clamp(1.4rem, 3vw, 2.1rem);letter-spacing:-0.01em}
h3{font-size:clamp(1.1rem, 2vw, 1.5rem)}
h4{font-size:1.1rem}
p{margin-bottom:1rem;color:var(--text-secondary)}
p:last-child{margin-bottom:0}
/* ===== Container ===== */
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 16px}}
/* ===== Header / Nav ===== */
#header{position:fixed;top:0;left:0;width:100%;z-index:1000;transition:background var(--transition),box-shadow var(--transition),backdrop-filter var(--transition);height:var(--header-height)}
#header.scrolled{background:rgba(255,255,255,0.92);backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);box-shadow:0 1px 0 var(--border),var(--shadow-glass)}
#header:not(.scrolled){background:rgba(255,255,255,0.12);backdrop-filter:blur(8px) saturate(150%);-webkit-backdrop-filter:blur(8px) saturate(150%)}
#header nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 24px;max-width:var(--max-width);margin:0 auto}
#header .logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.25rem;color:var(--text-primary);text-decoration:none;transition:opacity var(--transition);flex-shrink:0}
#header .logo:hover{opacity:0.85;color:var(--text-primary)}
#header .logo-icon{font-size:1.5rem;color:var(--primary);line-height:1}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links li a{display:inline-flex;align-items:center;padding:8px 18px;border-radius:var(--radius-sm);font-size:0.9rem;font-weight:500;color:var(--text-secondary);transition:all var(--transition);position:relative;text-decoration:none}
.nav-links li a:hover{color:var(--primary);background:rgba(99,102,241,0.08)}
.nav-links li a.active{color:var(--primary);background:rgba(99,102,241,0.1);font-weight:600}
.nav-links li a.nav-cta{background:var(--primary);color:#fff;border-radius:var(--radius-sm);padding:8px 22px;font-weight:600;box-shadow:0 2px 8px rgba(99,102,241,0.3)}
.nav-links li a.nav-cta:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 6px 20px rgba(99,102,241,0.35)}
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;background:transparent;border:none;cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:background var(--transition)}
.nav-toggle:hover{background:rgba(99,102,241,0.08)}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-primary);border-radius:2px;transition:all 0.3s;margin:3px 0}
.nav-toggle.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .nav-links{position:fixed;top:var(--header-height);left:0;width:100%;flex-direction:column;background:rgba(255,255,255,0.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding:16px 24px 24px;gap:4px;box-shadow:var(--shadow-lg);transform:translateY(-120%);opacity:0;transition:all 0.35s cubic-bezier(0.22,1,0.36,1);border-top:1px solid var(--border);pointer-events:none;border-radius:0 0 var(--radius-lg) var(--radius-lg)}
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav-links li a{width:100%;padding:12px 16px;font-size:1rem;justify-content:center}
  .nav-links li a.nav-cta{margin-top:8px;justify-content:center}
}
/* ===== Article Banner ===== */
.article-banner{position:relative;padding:140px 0 70px;margin-top:0;background:var(--bg-dark);overflow:hidden;min-height:320px;display:flex;align-items:center}
.article-banner .banner-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center center / cover no-repeat;opacity:0.5;transform:scale(1.02);transition:transform 0.6s}
.article-banner .banner-overlay{position:absolute;inset:0;background:linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,27,75,0.7) 50%, rgba(15,23,42,0.85) 100%)}
.article-banner .container{position:relative;z-index:2;text-align:center}
.article-banner .breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;font-size:0.85rem;color:rgba(255,255,255,0.6);margin-bottom:24px;flex-wrap:wrap}
.article-banner .breadcrumb a{color:rgba(255,255,255,0.7);text-decoration:none;transition:color var(--transition)}
.article-banner .breadcrumb a:hover{color:#fff}
.article-banner .breadcrumb span{color:rgba(255,255,255,0.4)}
.article-banner .banner-category{display:inline-flex;align-items:center;gap:6px;background:rgba(99,102,241,0.2);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);border:1px solid rgba(99,102,241,0.3);padding:6px 18px;border-radius:100px;font-size:0.8rem;font-weight:500;color:var(--primary-light);margin-bottom:20px}
.article-banner h1{color:#fff;font-size:clamp(1.6rem, 4.5vw, 2.8rem);max-width:800px;margin:0 auto 20px;line-height:1.25;text-shadow:0 2px 20px rgba(0,0,0,0.3)}
.article-banner .banner-meta{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;color:rgba(255,255,255,0.7);font-size:0.9rem}
.article-banner .banner-meta i{margin-right:4px;color:var(--primary-light)}
.article-banner .banner-meta span{display:inline-flex;align-items:center}
/* ===== Main Content ===== */
.article-main{padding:60px 0 80px}
.article-layout{display:grid;grid-template-columns:1fr 340px;gap:48px}
@media(max-width:1024px){.article-layout{grid-template-columns:1fr;gap:40px}}
.article-body{background:var(--bg-card);border-radius:var(--radius-lg);padding:40px 44px;box-shadow:var(--shadow-sm);border:1px solid var(--border)}
@media(max-width:640px){.article-body{padding:24px 20px;border-radius:var(--radius-md)}}
.article-body .article-content{font-size:1.05rem;line-height:1.85;color:var(--text-primary)}
.article-body .article-content p{margin-bottom:1.4rem;color:var(--text-secondary)}
.article-body .article-content h2,.article-body .article-content h3{margin-top:2rem;margin-bottom:0.8rem;color:var(--text-primary)}
.article-body .article-content h2{font-size:1.5rem}
.article-body .article-content h3{font-size:1.2rem}
.article-body .article-content img{border-radius:var(--radius-md);margin:1.6rem 0;box-shadow:var(--shadow-md)}
.article-body .article-content ul,.article-body .article-content ol{padding-left:1.5rem;margin-bottom:1.4rem;color:var(--text-secondary)}
.article-body .article-content ul li{list-style:disc;margin-bottom:0.3rem}
.article-body .article-content ol li{list-style:decimal;margin-bottom:0.3rem}
.article-body .article-content blockquote{border-left:4px solid var(--primary);padding:16px 24px;margin:1.6rem 0;background:var(--bg-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary);font-style:italic}
.article-body .article-content a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}
.article-body .article-content a:hover{color:var(--primary-dark)}
/* ===== Tags ===== */
.article-tags{margin-top:32px;padding-top:24px;border-top:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.article-tags .tag-label{font-size:0.85rem;font-weight:600;color:var(--text-secondary);margin-right:4px}
.article-tags .tag{display:inline-flex;align-items:center;padding:4px 14px;background:var(--bg-soft);border-radius:100px;font-size:0.8rem;color:var(--text-secondary);transition:all var(--transition);border:1px solid var(--border)}
.article-tags .tag:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-1px)}
/* ===== Sidebar ===== */
.article-sidebar{display:flex;flex-direction:column;gap:28px}
.sidebar-card{background:var(--bg-card);border-radius:var(--radius-md);padding:28px 24px;box-shadow:var(--shadow-sm);border:1px solid var(--border)}
.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-list li{border-bottom:1px solid var(--border-light);padding:12px 0}
.sidebar-list li:last-child{border-bottom:none}
.sidebar-list li a{display:flex;align-items:flex-start;gap:12px;color:var(--text-secondary);transition:all var(--transition);text-decoration:none}
.sidebar-list li a:hover{color:var(--primary);transform:translateX(4px)}
.sidebar-list li a .list-num{font-size:0.8rem;font-weight:700;color:var(--primary-light);background:rgba(99,102,241,0.1);width:24px;height:24px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.sidebar-list li a .list-text{font-size:0.9rem;line-height:1.4}
.sidebar-cta{background:linear-gradient(135deg, var(--primary), #8b5cf6);border-radius:var(--radius-md);padding:28px 24px;text-align:center;color:#fff;border:none}
.sidebar-cta h3{color:#fff;font-size:1.1rem;margin-bottom:8px}
.sidebar-cta p{color:rgba(255,255,255,0.85);font-size:0.9rem;margin-bottom:16px}
.sidebar-cta .btn-solid{background:#fff;color:var(--primary);padding:10px 28px;border-radius:var(--radius-sm);font-weight:600;display:inline-flex;align-items:center;gap:8px;transition:all var(--transition);text-decoration:none}
.sidebar-cta .btn-solid:hover{background:var(--bg-soft);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,0.15);color:var(--primary-dark)}
/* ===== Related Section ===== */
.related-section{padding:60px 0;background:var(--bg-soft)}
.related-section .section-title{text-align:center;margin-bottom:40px}
.related-section .section-title h2{font-size:clamp(1.4rem, 2.5vw, 1.9rem);color:var(--text-primary);margin-bottom:8px}
.related-section .section-title p{color:var(--text-muted);font-size:1rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:1024px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.related-grid{grid-template-columns:1fr}}
.related-card{background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition);display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.related-card .rc-img{height:180px;overflow:hidden;position:relative}
.related-card .rc-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s}
.related-card:hover .rc-img img{transform:scale(1.05)}
.related-card .rc-img .rc-cat{position:absolute;top:12px;left:12px;background:rgba(99,102,241,0.9);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);padding:4px 12px;border-radius:100px;font-size:0.75rem;font-weight:600;color:#fff}
.related-card .rc-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
.related-card .rc-body h3{font-size:1rem;font-weight:600;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .rc-body h3 a{color:var(--text-primary);text-decoration:none;transition:color var(--transition)}
.related-card .rc-body h3 a:hover{color:var(--primary)}
.related-card .rc-body p{font-size:0.85rem;color:var(--text-muted);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.related-card .rc-body .rc-meta{font-size:0.8rem;color:var(--text-muted);display:flex;align-items:center;gap:12px}
.related-card .rc-body .rc-meta i{margin-right:4px;font-size:0.75rem}
/* ===== FAQ ===== */
.faq-section{padding:60px 0;background:var(--bg-body)}
.faq-section .section-title{text-align:center;margin-bottom:40px}
.faq-section .section-title h2{font-size:clamp(1.4rem, 2.5vw, 1.9rem);color:var(--text-primary);margin-bottom:8px}
.faq-section .section-title p{color:var(--text-muted);font-size:1rem}
.faq-grid{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border);overflow:hidden;transition:all var(--transition);box-shadow:var(--shadow-sm)}
.faq-item:hover{border-color:var(--primary-light);box-shadow:var(--shadow-md)}
.faq-item .faq-q{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;cursor:pointer;font-weight:600;font-size:1rem;color:var(--text-primary);gap:12px;transition:background var(--transition);user-select:none}
.faq-item .faq-q:hover{background:var(--bg-soft)}
.faq-item .faq-q i{color:var(--primary);font-size:0.9rem;transition:transform 0.3s;flex-shrink:0}
.faq-item.open .faq-q i{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px 0;max-height:0;overflow:hidden;transition:all 0.35s cubic-bezier(0.22,1,0.36,1);color:var(--text-secondary);font-size:0.95rem;line-height:1.7}
.faq-item.open .faq-a{padding:0 24px 20px;max-height:300px}
/* ===== CTA Section ===== */
.cta-section{padding:70px 0;background:var(--bg-dark);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center center / cover no-repeat;opacity:0.15;transform:scale(1.02)}
.cta-section .container{position:relative;z-index:2;text-align:center}
.cta-section h2{color:#fff;font-size:clamp(1.5rem, 3vw, 2.2rem);margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,0.7);font-size:1.1rem;max-width:600px;margin:0 auto 28px}
.cta-section .cta-btns{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-section .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;transition:all var(--transition);text-decoration:none;box-shadow:0 4px 16px rgba(99,102,241,0.3)}
.cta-section .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(99,102,241,0.4);color:#fff}
.cta-section .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.25);border-radius:var(--radius-sm);font-weight:600;font-size:1rem;transition:all var(--transition);text-decoration:none}
.cta-section .btn-outline:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.5);transform:translateY(-2px);color:#fff}
/* ===== Not Found ===== */
.not-found-block{text-align:center;padding:40px 20px}
.not-found-block .nf-icon{font-size:3.5rem;color:var(--text-muted);margin-bottom:16px}
.not-found-block h2{font-size:1.5rem;margin-bottom:12px}
.not-found-block p{color:var(--text-muted);margin-bottom:24px;font-size:1rem}
.not-found-block .btn-back{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-weight:600;transition:all var(--transition);text-decoration:none}
.not-found-block .btn-back:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(99,102,241,0.3);color:#fff}
/* ===== Footer ===== */
footer{background:var(--bg-dark);color:rgba(255,255,255,0.8);padding:60px 0 0;border-top:1px solid rgba(255,255,255,0.06)}
footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.06)}
@media(max-width:1024px){footer .footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:640px){footer .footer-grid{grid-template-columns:1fr;gap:28px}}
footer .footer-brand .logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.2rem;color:#fff;text-decoration:none;margin-bottom:14px}
footer .footer-brand .logo .logo-icon{font-size:1.5rem;color:var(--primary-light)}
footer .footer-brand p{font-size:0.9rem;color:rgba(255,255,255,0.55);line-height:1.7;max-width:360px}
footer .footer-col h4{font-size:0.95rem;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:0.3px}
footer .footer-col ul li{margin-bottom:10px}
footer .footer-col ul li a{color:rgba(255,255,255,0.55);font-size:0.9rem;text-decoration:none;transition:all var(--transition);display:inline-flex;align-items:center;gap:6px}
footer .footer-col ul li a:hover{color:var(--primary-light);transform:translateX(4px)}
footer .footer-bottom{display:flex;align-items:center;justify-content:space-between;padding:24px 0;font-size:0.85rem;color:rgba(255,255,255,0.4);flex-wrap:wrap;gap:12px}
footer .footer-bottom a{color:rgba(255,255,255,0.5);text-decoration:none;transition:color var(--transition)}
footer .footer-bottom a:hover{color:var(--primary-light)}
@media(max-width:640px){footer .footer-bottom{flex-direction:column;text-align:center}}
/* ===== Utility ===== */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
/* ===== Responsive Fine-tune ===== */
@media(max-width:520px){
  .article-banner{padding:110px 0 50px;min-height:240px}
  .article-banner h1{font-size:1.4rem}
  .article-banner .banner-meta{font-size:0.8rem;gap:10px}
  .article-body{padding:20px 16px}
  .sidebar-card{padding:20px 16px}
  .related-card .rc-img{height:150px}
  .faq-item .faq-q{padding:14px 16px;font-size:0.95rem}
  .cta-section{padding:50px 0}
  .cta-section .btn-primary,.cta-section .btn-outline{padding:12px 28px;font-size:0.95rem}
}