/* roulang page: index */
:root {
  --primary: #6D28D9;
  --primary-light: #8B5CF6;
  --primary-lighter: #C084FC;
  --primary-bg: #F1EBFD;
  --accent: #F97316;
  --accent-hover: #EA580C;
  --bg: #F7F6FB;
  --card-bg: #FFFFFF;
  --dark: #17122B;
  --dark-2: #1F1937;
  --text-main: #191433;
  --text-body: #3F3A52;
  --text-muted: #8A86A0;
  --link: #6D28D9;
  --link-hover: #4C1D95;
  --border: rgba(109,40,217,0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-card: 0 10px 30px rgba(109,40,217,0.08);
  --shadow-hover: 0 16px 40px rgba(109,40,217,0.14);
  --gradient-brand: linear-gradient(135deg,#8B5CF6,#6D28D9);
  --gradient-accent: linear-gradient(135deg,#F97316,#EA580C);
  --font: 'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',sans-serif;
  --font-num: 'DIN Alternate','Roboto Mono',ui-monospace,monospace;
  --max-width: 1200px;
  --pad: 24px;
  --space: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text-body);line-height:1.9;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--link);text-decoration:none;transition:color .25s}
a:hover{color:var(--link-hover)}
button,input{font-family:inherit;font-size:inherit;border:none;outline:none}
ul,ol{list-style:none}
.container{max-width:var(--max-width);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{padding:var(--space) 0}
.section-alt{background:#fff}
.section-header{text-align:center;max-width:640px;margin:0 auto 40px}
.section-header h2{font-size:28px;font-weight:700;color:var(--text-main);letter-spacing:.5px}
.section-header p{margin-top:10px;font-size:15px;color:var(--text-muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;padding:12px 26px;line-height:1.2;cursor:pointer;transition:all .25s;text-align:center;border:2px solid transparent}
.btn:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(109,40,217,.35)}
.btn-accent{background:var(--gradient-accent);color:#fff;box-shadow:0 6px 20px rgba(249,115,22,.25)}
.btn-accent:hover{background:linear-gradient(135deg,#FB923C,#EA580C);transform:translateY(-2px);box-shadow:0 10px 28px rgba(249,115,22,.32);color:#fff}
.btn-accent:active{transform:translateY(0)}
.btn-primary{background:var(--gradient-brand);color:#fff;box-shadow:0 6px 20px rgba(109,40,217,.22)}
.btn-primary:hover{background:linear-gradient(135deg,#A78BFA,#6D28D9);transform:translateY(-2px);color:#fff}
.btn-outline{background:#fff;border-color:var(--primary);color:var(--link)}
.btn-outline:hover{background:var(--primary-bg);border-color:var(--primary);color:var(--link-hover);transform:translateY(-2px)}
.btn-lg{padding:16px 34px;font-size:16px}
.btn-block{width:100%}
.badge{display:inline-flex;align-items:center;border-radius:var(--radius-pill);font-family:var(--font-num);font-weight:700;padding:4px 14px;background:var(--gradient-brand);color:#fff;font-size:14px;line-height:1.6;white-space:nowrap}
.chip{display:inline-flex;align-items:center;border-radius:var(--radius-pill);background:#F1EBFD;color:var(--link);font-size:13px;font-weight:500;padding:4px 12px}
.card{background:var(--card-bg);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-card);transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.85);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid rgba(109,40,217,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:38px;height:38px;border-radius:12px;background:var(--gradient-brand);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;box-shadow:0 4px 12px rgba(109,40,217,.28)}
.logo-text{font-size:20px;font-weight:800;color:var(--text-main);letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{display:inline-block;padding:8px 16px;border-radius:var(--radius-pill);font-size:15px;font-weight:500;color:var(--text-body);transition:all .25s}
.nav-link:hover{color:var(--link);background:rgba(109,40,217,.05)}
.nav-link.active{background:var(--primary-bg);color:var(--link);font-weight:600}
.nav-cta{margin-left:10px;padding:10px 22px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:transparent;cursor:pointer;padding:8px;border-radius:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-main);border-radius:2px;transition:transform .3s,opacity .3s}

/* ===== Hero ===== */
.hero{position:relative;min-height:80vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(rgba(23,18,43,.12),rgba(23,18,43,.35)),url('/assets/images/backpic/back-1.png') center/cover no-repeat,var(--gradient-brand);overflow:hidden;padding:90px 0}
.hero::before{content:'';position:absolute;top:-40%;right:-20%;width:500px;height:500px;border-radius:50%;background:rgba(139,92,246,.25);filter:blur(90px);pointer-events:none}
.hero-inner{position:relative;z-index:2;max-width:860px;margin:0 auto}
.hero-chip{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.15);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:var(--radius-pill);padding:6px 18px;font-size:14px;margin-bottom:24px;letter-spacing:.5px}
.hero h1{font-size:44px;font-weight:800;color:#fff;line-height:1.3;letter-spacing:1px;text-shadow:0 2px 20px rgba(0,0,0,.15)}
.hero-sub{font-size:18px;color:rgba(255,255,255,.92);margin-top:16px;max-width:560px;margin-left:auto;margin-right:auto;line-height:1.8}
.hero-actions{display:flex;gap:16px;justify-content:center;margin-top:32px;flex-wrap:wrap}
.hero-stats{display:flex;gap:14px;justify-content:center;margin-top:44px;flex-wrap:wrap}
.stat-card{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:var(--radius-pill);padding:12px 24px;box-shadow:0 10px 30px rgba(23,18,43,.12);border:1px solid rgba(255,255,255,.6)}
.stat-num{font-family:var(--font-num);font-size:24px;font-weight:800;background:var(--gradient-brand);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}
.stat-label{font-size:14px;color:var(--text-body);font-weight:500}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.news-card-featured{grid-column:1/-1;display:grid;grid-template-columns:1.2fr 1fr;gap:0;overflow:hidden}
.news-card{overflow:hidden}
.news-card .news-cover{position:relative;overflow:hidden;background:linear-gradient(90deg,#E9E6F5 25%,#F5F3FE 50%,#E9E6F5 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
.news-card .news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-card-featured .news-cover{min-height:280px}
.news-card:not(.news-card-featured) .news-cover{height:180px}
.news-chip{position:absolute;top:14px;left:14px;z-index:2}
.news-body{padding:22px;display:flex;flex-direction:column;gap:8px}
.news-body h3{font-size:17px;font-weight:600;color:var(--text-main);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14px;color:var(--text-muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{font-size:13px;color:var(--text-muted);margin-top:auto}
.empty-state{grid-column:1/-1;text-align:center;padding:56px 20px;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-card)}
.empty-state .empty-icon{font-size:42px;margin-bottom:12px}
.empty-state p{font-size:16px;color:var(--text-body);margin-bottom:12px}
.empty-state a{font-weight:600;color:var(--link);border-bottom:2px solid var(--primary-bg);padding-bottom:2px}

/* ===== Table ===== */
.table-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-card)}
.benefit-table{width:100%;border-collapse:collapse;min-width:680px}
.benefit-table th,.benefit-table td{padding:16px 20px;text-align:center;font-size:15px;border-bottom:1px solid rgba(109,40,217,.06)}
.benefit-table thead th{background:var(--dark);color:#fff;font-weight:600;padding:18px 20px;white-space:nowrap}
.benefit-table thead th:first-child{border-top-left-radius:20px}
.benefit-table thead th:last-child{border-top-right-radius:20px}
.benefit-table td:first-child{text-align:left;font-weight:500;color:var(--text-body)}
.benefit-table tbody tr:nth-child(even){background:#FAF8FE}
.benefit-table tbody tr:hover{background:var(--primary-bg)}
.benefit-table .yes{color:var(--primary);font-weight:700;font-size:18px}
.benefit-table .no{color:#C4C0D0;font-size:16px}
.benefit-table .rec-col{position:relative;background:rgba(109,40,217,.04)}
.benefit-table .rec-badge{position:absolute;top:-10px;left:50%;transform:translateX(-50%);background:var(--gradient-accent);color:#fff;font-size:12px;font-weight:700;padding:3px 14px;border-radius:var(--radius-pill);white-space:nowrap;box-shadow:0 4px 12px rgba(249,115,22,.32)}

/* ===== Levels ===== */
.levels-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.level-card{position:relative;padding:32px 28px;overflow:hidden}
.level-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-brand);opacity:0;transition:opacity .3s}
.level-card:hover::before{opacity:1}
.level-card .level-name{font-size:20px;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:10px;margin-bottom:6px}
.level-card .level-desc{font-size:14px;color:var(--text-muted);margin-bottom:20px}
.level-card .level-list{display:flex;flex-direction:column;gap:8px}
.level-card .level-list li{position:relative;padding-left:18px;font-size:15px;color:var(--text-body)}
.level-card .level-list li::before{content:'';position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--primary-light)}
.level-card .level-badge{position:absolute;top:20px;right:20px}

/* ===== Preview ===== */
.preview-wrap{display:flex;gap:24px;align-items:stretch}
.preview-cards{flex:1;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.preview-card{overflow:hidden;display:flex;flex-direction:column}
.preview-card.locked .preview-cover{position:relative}
.preview-card.locked .preview-cover img{filter:blur(4px)}
.preview-card.locked .preview-cover::after{content:'🔒';position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(23,18,43,.45);display:flex;align-items:center;justify-content:center;font-size:26px;color:#fff}
.preview-cover{height:160px;overflow:hidden;background:linear-gradient(90deg,#E9E6F5 25%,#F5F3FE 50%,#E9E6F5 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}
.preview-cover img{width:100%;height:100%;object-fit:cover}
.preview-body{padding:18px;flex:1;display:flex;flex-direction:column;gap:6px}
.preview-body h3{font-size:16px;font-weight:600;color:var(--text-main);line-height:1.5}
.preview-body p{font-size:13px;color:var(--text-muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.preview-body .preview-meta{font-size:12px;color:var(--primary-light);margin-top:auto}
.preview-side{width:300px;flex-shrink:0;display:flex}
.preview-guide{background:var(--dark);border-radius:var(--radius-lg);padding:32px 26px;color:#fff;display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;width:100%}
.preview-guide::before{content:'';position:absolute;top:-30%;right:-30%;width:200px;height:200px;border-radius:50%;background:rgba(139,92,246,.3);filter:blur(40px)}
.preview-guide .guide-label{font-size:14px;color:rgba(255,255,255,.7);letter-spacing:1px}
.preview-guide .guide-level{font-size:26px;font-weight:800;line-height:1.3}
.preview-guide .guide-price{margin:6px 0}
.preview-guide .guide-list{font-size:14px;color:rgba(255,255,255,.85);display:flex;flex-direction:column;gap:6px}
.preview-guide .guide-list li{padding-left:20px;position:relative}
.preview-guide .guide-list li::before{content:'✓';position:absolute;left:0;color:var(--primary-lighter);font-weight:700}
.preview-guide .btn{margin-top:auto}

/* ===== FAQ ===== */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:#fff;border-radius:var(--radius-md);border:1px solid var(--border);box-shadow:0 4px 16px rgba(109,40,217,.04);overflow:hidden;transition:box-shadow .3s}
.faq-item.open{box-shadow:var(--shadow-card);border-left:4px solid var(--accent)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 22px;font-size:17px;font-weight:600;color:var(--text-main);background:transparent;cursor:pointer;text-align:left;transition:color .3s}
.faq-question:hover{color:var(--link)}
.faq-icon{width:22px;height:22px;position:relative;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--primary-light);border-radius:2px;transition:transform .3s}
.faq-icon::before{width:14px;height:2px;top:10px;left:4px}
.faq-icon::after{width:2px;height:14px;top:4px;left:10px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 22px 20px;font-size:15px;color:var(--text-body);line-height:1.8}

/* ===== CTA ===== */
.cta-section{background:var(--dark);position:relative;overflow:hidden;padding:88px 0}
.cta-section::before{content:'';position:absolute;top:-60%;left:-10%;width:500px;height:500px;border-radius:50%;background:rgba(139,92,246,.2);filter:blur(90px)}
.cta-section::after{content:'';position:absolute;bottom:-80%;right:-10%;width:400px;height:400px;border-radius:50%;background:rgba(249,115,22,.12);filter:blur(70px)}
.cta-card{position:relative;z-index:2;text-align:center;max-width:640px;margin:0 auto}
.cta-card h2{color:#fff;font-size:30px;font-weight:800;line-height:1.4}
.cta-card>p{color:rgba(255,255,255,.75);font-size:16px;margin-top:14px}
.cta-price{margin:24px 0}
.cta-price .badge{font-size:20px;padding:10px 28px;background:var(--gradient-accent);box-shadow:0 8px 24px rgba(249,115,22,.3)}
.cta-promises{display:flex;justify-content:center;gap:28px;margin-top:30px;flex-wrap:wrap}
.cta-promise{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.85);font-size:14px}
.cta-promise .promise-icon{width:30px;height:30px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:15px}

/* ===== Footer ===== */
.site-footer{background:var(--dark-2);color:rgba(255,255,255,.75);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo-text{color:#fff;font-size:22px}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px;color:rgba(255,255,255,.6)}
.footer-col h4{color:#fff;font-size:16px;font-weight:600;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:rgba(255,255,255,.65);font-size:14px;transition:color .25s}
.footer-col ul a:hover{color:var(--primary-lighter)}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.55);margin-bottom:8px;line-height:1.7}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.5)}
.footer-icp{font-size:13px;color:rgba(255,255,255,.4)}

/* ===== Modal ===== */
.modal-overlay{position:fixed;inset:0;z-index:200;background:rgba(23,18,43,.55);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:#fff;border-radius:24px;width:92%;max-width:420px;padding:36px 32px;box-shadow:0 30px 80px rgba(23,18,43,.3);position:relative;transform:translateY(16px);transition:transform .3s}
.modal-overlay.active .modal{transform:translateY(0)}
.modal-close{position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--text-muted);cursor:pointer;transition:all .25s}
.modal-close:hover{background:var(--primary-bg);color:var(--link)}
.modal-icon{width:52px;height:52px;border-radius:16px;background:var(--gradient-brand);color:#fff;font-size:24px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;box-shadow:0 8px 20px rgba(109,40,217,.25)}
.modal h3{font-size:22px;font-weight:700;color:var(--text-main)}
.modal .modal-sub{font-size:14px;color:var(--text-muted);margin-top:6px;margin-bottom:22px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:6px;font-weight:500}
.form-group input{width:100%;padding:12px 16px;border:1px solid rgba(109,40,217,.15);border-radius:var(--radius-md);font-size:15px;color:var(--text-main);background:var(--bg);transition:border-color .25s,box-shadow .25s}
.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(109,40,217,.12);background:#fff}
.form-group .form-error{color:#E11D48;font-size:12px;margin-top:4px;display:none}
.form-actions{margin-top:22px}
.form-footnote{text-align:center;font-size:12px;color:var(--text-muted);margin-top:14px}

/* ===== Responsive ===== */
@media(max-width:1023px){
  .news-grid{grid-template-columns:1fr}
  .news-card-featured{grid-template-columns:1fr}
  .news-card-featured .news-cover{min-height:220px}
  .news-card:not(.news-card-featured) .news-cover{height:200px}
  .levels-grid{grid-template-columns:1fr 1fr}
  .preview-wrap{flex-direction:column}
  .preview-side{width:100%}
  .preview-guide .btn{width:100%}
}
@media(max-width:767px){
  :root{--space:48px}
  .nav-toggle{display:flex}
  .main-nav{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:20px 24px;gap:8px;box-shadow:0 20px 40px rgba(23,18,43,.12);transform:translateY(-120%);opacity:0;visibility:hidden;transition:all .35s ease;border-bottom:1px solid var(--border)}
  .main-nav.active{transform:translateY(0);opacity:1;visibility:visible}
  .nav-link{text-align:center;padding:12px;font-size:16px}
  .nav-cta{margin:8px 0 0;width:100%;justify-content:center}
  .hero{min-height:70vh;padding:60px 0}
  .hero h1{font-size:26px;line-height:1.4}
  .hero-sub{font-size:15px}
  .hero-stats{flex-wrap:wrap}
  .stat-card{padding:10px 16px}
  .levels-grid{grid-template-columns:1fr}
  .preview-cards{grid-template-columns:1fr}
  .cta-card h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:32px}
  .footer-bottom-inner{flex-direction:column;text-align:center}
  .section-header h2{font-size:24px}
  .section-header p{font-size:14px}
  .benefit-table thead th{padding:14px 12px;font-size:14px}
  .benefit-table td{padding:12px;font-size:14px}
}
@media(max-width:520px){
  .hero-actions .btn{width:100%;padding:14px}
  .hero-stats{flex-direction:column;align-items:center}
  .stat-card{width:100%;justify-content:center}
  .news-body h3{font-size:16px}
  .level-card{padding:24px 20px}
  .level-badge{position:static;margin-bottom:10px}
  .cta-promises{flex-direction:column;align-items:center;gap:12px}
}

/* roulang page: article */
:root {
    --primary: #6D28D9;
    --primary-light: #8B5CF6;
    --primary-lighter: #C084FC;
    --primary-bg: #F1EBFD;
    --primary-trans: rgba(109, 40, 217, 0.08);
    --accent: #F97316;
    --accent-dark: #EA580C;
    --bg: #F7F6FB;
    --card: #FFFFFF;
    --dark: #17122B;
    --dark-2: #1F1937;
    --text-title: #191433;
    --text-body: #3F3A52;
    --text-mute: #8A86A0;
    --link: #6D28D9;
    --link-hover: #4C1D95;
    --border: rgba(109, 40, 217, 0.08);
    --border-strong: rgba(109, 40, 217, 0.16);
    --shadow-card: 0 10px 30px rgba(109, 40, 217, 0.08);
    --shadow-hover: 0 16px 40px rgba(109, 40, 217, 0.14);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --radius-pill: 999px;
    --font-cn: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --font-num: 'DIN Alternate', 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;
    --container: 1200px;
    --header-h: 72px;
    --space-lg: 72px;
    --space-md: 48px;
    --space-sm: 24px;
    --grad-brand: linear-gradient(135deg, #8B5CF6, #6D28D9);
    --grad-accent: linear-gradient(135deg, #F97316, #EA580C);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-cn);
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--link);
    text-decoration: none;
    transition: color .2s ease;
}

a:hover {
    color: var(--link-hover);
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    border-radius: var(--radius-pill);
    text-align: center;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
    white-space: nowrap;
}
.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.btn-primary {
    background: var(--grad-brand);
    color: #fff;
    box-shadow: 0 8px 24px rgba(109, 40, 217, 0.25);
}
.btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(109, 40, 217, 0.32);
}
.btn-accent {
    background: var(--grad-accent);
    color: #fff;
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.28);
}
.btn-accent:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(249, 115, 22, 0.36);
}
.btn-outline {
    background: #fff;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary-bg);
    color: var(--primary);
    transform: translateY(-2px);
}
.btn-large {
    padding: 14px 36px;
    font-size: 15px;
}
.btn:active {
    transform: translateY(0);
}

/* ===== Header / Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    gap: 20px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--grad-brand);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    box-shadow: 0 6px 16px rgba(109, 40, 217, 0.3);
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-title);
    letter-spacing: 0.5px;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    position: relative;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    border-radius: var(--radius-pill);
    transition: background .2s ease, color .2s ease;
}
.nav-link:hover {
    color: var(--primary);
    background: var(--primary-bg);
}
.nav-link.active {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 600;
}
.nav-cta {
    margin-left: 12px;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: var(--primary-bg);
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform .25s ease, opacity .25s ease;
}
.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);
}

/* ===== Breadcrumb ===== */
.breadcrumb-section {
    padding-top: 28px;
    padding-bottom: 12px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-mute);
    gap: 6px;
}
.breadcrumb a {
    color: var(--text-mute);
    transition: color .2s ease;
}
.breadcrumb a:hover {
    color: var(--primary);
}
.breadcrumb-sep {
    color: #c4c1d2;
}
.breadcrumb-current {
    color: var(--text-title);
    max-width: 420px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== Article Header ===== */
.article-header-section {
    padding-bottom: 24px;
}
.article-header {
    background: var(--card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 40px 48px 0;
    position: relative;
    overflow: hidden;
}
.article-header::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.18), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}
.chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-bg);
    border-radius: var(--radius-pill);
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-mute);
}
.article-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-title);
    margin-bottom: 24px;
    letter-spacing: 0.2px;
}
.article-cover {
    margin: 24px -48px 0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    overflow: hidden;
    background: var(--primary-bg);
}
.article-cover img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

/* ===== Article Body ===== */
.article-body-wrap {
    padding: 8px 0 16px;
}
.article-body {
    max-width: 760px;
    margin: 0 auto;
    background: var(--card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 48px 56px;
    line-height: 1.9;
}
.article-body h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-title);
    margin: 40px 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--primary);
    line-height: 1.4;
}
.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-title);
    margin: 32px 0 12px;
    line-height: 1.5;
}
.article-body p {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-body);
    margin-bottom: 20px;
}
.article-body strong {
    color: var(--text-title);
    font-weight: 600;
}
.article-body a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-bg);
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
    color: var(--text-body);
    font-style: normal;
}
.article-body ul {
    margin: 20px 0;
    padding-left: 22px;
}
.article-body ul li {
    list-style: disc;
    margin-bottom: 10px;
    padding-left: 4px;
}
.article-body ol {
    margin: 20px 0;
    padding-left: 22px;
}
.article-body ol li {
    list-style: decimal;
    margin-bottom: 10px;
    padding-left: 4px;
}
.article-body table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 12px;
    overflow: hidden;
    margin: 28px 0;
    font-size: 15px;
}
.article-body table th {
    background: var(--dark);
    color: #fff;
    font-weight: 600;
    text-align: left;
    padding: 12px 18px;
}
.article-body table td {
    padding: 12px 18px;
    border-bottom: 1px solid var(--border);
}
.article-body table tr:nth-child(even) td {
    background: #FAF9FD;
}
.article-body table tr:last-child td {
    border-bottom: none;
}
.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 24px 0;
}
.article-body .not-found {
    text-align: center;
    padding: 60px 20px;
}
.article-body .not-found h2 {
    border-left: none;
    padding-left: 0;
    font-size: 26px;
    margin-bottom: 12px;
}
.article-body .not-found p {
    color: var(--text-mute);
    margin-bottom: 24px;
}

/* ===== Member Guide ===== */
.member-guide-section {
    padding: 32px 0;
}
.member-guide {
    max-width: 760px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.10), rgba(109, 40, 217, 0.06));
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    padding: 20px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.member-guide-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 240px;
}
.member-guide-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    background: var(--grad-accent);
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    flex-shrink: 0;
}
.member-guide-text {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.6;
}
.member-guide-text strong {
    color: var(--primary);
}

/* ===== Article Nav ===== */
.article-nav-section {
    padding: 16px 0 8px;
}
.article-nav {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    gap: 16px;
    justify-content: space-between;
}
.article-nav-card {
    flex: 1;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    transition: box-shadow .2s ease, transform .2s ease;
}
.article-nav-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.nav-label {
    display: block;
    font-size: 12px;
    color: var(--text-mute);
    margin-bottom: 6px;
}
.article-nav-card a {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-title);
    display: block;
}
.article-nav-card a:hover {
    color: var(--primary);
}
.article-nav-card.next {
    text-align: right;
}

/* ===== Related Section ===== */
.related-section {
    padding: 56px 0 var(--space-lg);
}
.section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 8px;
    letter-spacing: 0.2px;
}
.section-subtitle {
    font-size: 15px;
    color: var(--text-mute);
    margin-bottom: 28px;
    max-width: 600px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform .25s ease, box-shadow .25s ease;
    display: flex;
    flex-direction: column;
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.related-cover {
    overflow: hidden;
    background: var(--primary-bg);
    aspect-ratio: 16/10;
}
.related-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
}
.related-card:hover .related-cover img {
    transform: scale(1.03);
}
.related-body {
    padding: 20px 24px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.related-body .chip {
    align-self: flex-start;
    margin-bottom: 12px;
}
.related-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-title);
    line-height: 1.5;
    margin-bottom: 8px;
    transition: color .2s ease;
}
.related-card:hover .related-title {
    color: var(--primary);
}
.related-excerpt {
    font-size: 14px;
    color: var(--text-mute);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-link {
    margin-top: auto;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.related-link .arrow {
    transition: transform .2s ease;
    display: inline-block;
}
.related-card:hover .related-link .arrow {
    transform: translateX(4px);
}

/* ===== FAQ Section ===== */
.faq-section {
    padding: var(--space-lg) 0;
    background: var(--card);
}
.faq-list {
    max-width: 820px;
    margin: 20px auto 0;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    background: var(--bg);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item.open {
    border-color: rgba(109, 40, 217, 0.25);
    box-shadow: 0 8px 24px rgba(109, 40, 217, 0.06);
}
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 24px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-title);
    text-align: left;
    border-radius: var(--radius-md);
    transition: color .2s ease;
}
.faq-question:hover {
    color: var(--primary);
}
.faq-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 18px;
    font-weight: 400;
    transition: transform .3s ease, background .3s ease, color .3s ease;
    flex-shrink: 0;
}
.faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
}
.faq-answer {
    display: none;
    padding: 0 24px 20px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-body);
    border-left: 4px solid var(--primary);
    margin-left: 24px;
}
.faq-answer p {
    margin-bottom: 8px;
}
.faq-answer p:last-child {
    margin-bottom: 0;
}
.faq-item.open .faq-answer {
    display: block;
    animation: fadeIn .3s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== CTA Section ===== */
.cta-section {
    padding: var(--space-lg) 0;
    background: var(--dark);
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(109, 40, 217, 0.4), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.cta-card {
    position: relative;
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
    padding: 0 24px;
}
.cta-title {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.cta-sub {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
}
.cta-badge-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}
.price-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 24px;
    background: var(--grad-brand);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-num);
    border-radius: var(--radius-pill);
    box-shadow: 0 8px 24px rgba(109, 40, 217, 0.35);
}
.cta-points {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 28px;
}
.service-point {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}
.service-point::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(139, 92, 246, 0.35);
    color: #fff;
    font-size: 11px;
}

/* ===== Shimmer / Loading ===== */
.shimmer {
    position: relative;
    overflow: hidden;
    background: #E9E6F5;
}
.shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
    100% { left: 100%; }
}

/* ===== Footer ===== */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.72);
    padding-top: 56px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand .logo .logo-text {
    color: #fff;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-top: 16px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 340px;
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    transition: color .2s ease;
}
.footer-col ul li a:hover {
    color: var(--primary-lighter);
}
.footer-contact li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
    font-style: normal;
}
.footer-bottom {
    background: rgba(0, 0, 0, 0.3);
    padding: 16px 0;
}
.footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}
.footer-icp {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .article-cover img {
        height: 300px;
    }
}
@media (max-width: 767px) {
    :root {
        --space-lg: 48px;
    }
    .header-inner {
        height: 64px;
    }
    .nav-toggle {
        display: flex;
    }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: stretch;
        padding: 20px 24px 32px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform .3s ease, opacity .3s ease;
        border-radius: 0 0 20px 20px;
        z-index: 999;
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
    }
    .nav-link {
        padding: 12px 16px;
        font-size: 16px;
        border-radius: 14px;
    }
    .nav-cta {
        margin-left: 0;
        margin-top: 12px;
        width: 100%;
        justify-content: center;
    }
    .article-header {
        padding: 28px 24px 0;
    }
    .article-title {
        font-size: 26px;
    }
    .article-cover {
        margin: 20px -24px 0;
    }
    .article-cover img {
        height: 220px;
    }
    .article-body {
        padding: 28px 24px;
    }
    .article-body p {
        font-size: 16px;
    }
    .article-nav {
        flex-direction: column;
    }
    .article-nav-card.next {
        text-align: left;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .member-guide {
        padding: 18px 20px;
        flex-direction: column;
        align-items: stretch;
    }
    .member-guide-left {
        flex-wrap: wrap;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }
    .cta-title {
        font-size: 24px;
    }
}
@media (max-width: 520px) {
    .related-cover img {
        aspect-ratio: 16/9;
    }
    .article-meta {
        gap: 8px;
    }
    .member-guide-badge {
        font-size: 11px;
        padding: 4px 10px;
    }
    .member-guide-text {
        font-size: 14px;
    }
}

/* roulang page: category1 */
:root {
      --primary: #6D28D9;
      --primary-light: #8B5CF6;
      --primary-lighter: #C084FC;
      --primary-soft: #F1EBFD;
      --primary-hover: #4C1D95;
      --accent: #F97316;
      --accent-dark: #EA580C;
      --bg: #F7F6FB;
      --card-bg: #FFFFFF;
      --dark: #17122B;
      --dark-2: #1F1937;
      --title: #191433;
      --body: #3F3A52;
      --muted: #8A86A0;
      --border: rgba(109, 40, 217, 0.08);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-pill: 999px;
      --shadow: 0 10px 30px rgba(109, 40, 217, 0.08);
      --shadow-hover: 0 16px 40px rgba(109, 40, 217, 0.14);
      --gradient-brand: linear-gradient(135deg, #8B5CF6, #6D28D9);
      --gradient-accent: linear-gradient(135deg, #F97316, #EA580C);
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
      background: var(--bg);
      color: var(--body);
      line-height: 1.9;
      -webkit-font-smoothing: antialiased;
    }

    a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
    a:hover { color: var(--primary-hover); }
    img { max-width: 100%; display: block; }
    ul { list-style: none; }
    button, input, summary { font: inherit; }

    a:focus-visible, button:focus-visible, summary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: 6px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== Header / Nav ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }

    .logo { display: flex; align-items: center; gap: 10px; }

    .logo-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--gradient-brand);
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(109, 40, 217, 0.28);
    }

    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--title);
      letter-spacing: -0.5px;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-link {
      padding: 8px 14px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 500;
      color: var(--body);
      transition: all .2s ease;
    }

    .nav-link:hover { color: var(--primary); background: var(--primary-soft); }
    .nav-link.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      font-family: inherit;
      padding: 10px 22px;
      text-decoration: none;
      line-height: 1.4;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, opacity .2s ease;
    }

    .btn-accent {
      background: var(--gradient-accent);
      color: #fff;
      box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
    }

    .btn-accent:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(249, 115, 22, 0.38);
    }

    .btn-accent:active { transform: translateY(0); }
    .btn-accent:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

    .btn-primary {
      background: var(--gradient-brand);
      color: #fff;
      box-shadow: 0 8px 20px rgba(109, 40, 217, 0.28);
    }

    .btn-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    .btn-primary:active { transform: translateY(0); }

    .btn-outline {
      background: #fff;
      color: var(--primary);
      border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary-soft);
      color: var(--primary-hover);
      transform: translateY(-2px);
    }

    .btn-outline:active { transform: translateY(0); }
    .btn:disabled { background: #D1D0D8; box-shadow: none; cursor: not-allowed; transform: none; }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      border: 1px solid var(--border);
      background: #fff;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      cursor: pointer;
    }

    .nav-toggle span {
      width: 18px;
      height: 2px;
      background: var(--title);
      border-radius: 2px;
      transition: transform .3s ease, opacity .3s ease;
    }

    .nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

    /* ========== Category Hero ========== */
    .cat-hero {
      position: relative;
      padding: 72px 0 44px;
      background:
        linear-gradient(135deg, rgba(109, 40, 217, 0.08) 0%, rgba(139, 92, 246, 0.14) 60%, rgba(247, 246, 251, 0.2) 100%),
        url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      overflow: hidden;
      border-bottom: 1px solid rgba(109, 40, 217, 0.06);
    }

    .cat-hero::after {
      content: '';
      position: absolute;
      right: -120px;
      top: -150px;
      width: 380px;
      height: 380px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(192, 132, 252, 0.35), transparent 70%);
      pointer-events: none;
    }

    .cat-hero .container { position: relative; z-index: 2; }

    .breadcrumb {
      font-size: 13px;
      color: var(--muted);
      margin-bottom: 28px;
      display: flex;
      gap: 8px;
      align-items: center;
    }

    .breadcrumb a { color: var(--muted); }
    .breadcrumb a:hover { color: var(--primary); }
    .breadcrumb .sep { color: #C6C2D4; }

    .hero-title {
      font-size: 36px;
      font-weight: 800;
      color: var(--title);
      letter-spacing: -0.5px;
      line-height: 1.3;
    }

    .hero-title .dot { color: var(--accent); }

    .hero-desc {
      max-width: 640px;
      font-size: 17px;
      color: var(--body);
      margin-top: 16px;
      line-height: 1.9;
    }

    .hero-meta {
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .chip {
      font-size: 13px;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 6px 16px;
      border-radius: 999px;
      font-weight: 500;
    }

    /* ========== Stats Strip ========== */
    .cat-stats { padding: 0 0 8px; }

    .cat-stats .stats-tip {
      text-align: center;
      font-size: 15px;
      color: var(--muted);
      margin-bottom: 24px;
    }

    .tag-strip {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .tag-strip .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--gradient-brand);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 999px;
      box-shadow: 0 8px 20px rgba(109, 40, 217, 0.2);
      font-variant-numeric: tabular-nums;
      transition: transform .2s ease, box-shadow .2s ease;
    }

    .tag-strip .data-badge:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 26px rgba(109, 40, 217, 0.28);
    }

    .tag-strip .data-badge i { font-size: 14px; }

    /* ========== Section / Cards ========== */
    .section { padding: 72px 0; }

    .section-head {
      max-width: 720px;
      margin: 0 auto 40px;
      text-align: center;
    }

    .section-head .eyebrow {
      display: inline-block;
      font-size: 13px;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 14px;
      font-weight: 600;
    }

    .section-head h2 {
      font-size: 28px;
      color: var(--title);
      font-weight: 700;
      letter-spacing: -0.3px;
      line-height: 1.4;
    }

    .section-head p {
      font-size: 15px;
      color: var(--muted);
      margin-top: 10px;
    }

    .cat-topics {
      padding: 56px 0 72px;
    }

    .topic-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .topic-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: transform .25s ease, box-shadow .25s ease;
      display: flex;
      flex-direction: column;
    }

    .topic-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .topic-cover-wrap {
      position: relative;
      background: linear-gradient(110deg, #E9E6F5 8%, #F5F2FC 18%, #E9E6F5 33%);
      background-size: 200% 100%;
      animation: shimmer 1.4s ease infinite;
    }

    @keyframes shimmer {
      to { background-position-x: -200%; }
    }

    .topic-cover {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }

    .topic-num {
      position: absolute;
      left: 18px;
      top: 14px;
      z-index: 2;
      font-family: "DIN Alternate", "Roboto Mono", monospace;
      font-variant-numeric: tabular-nums;
      font-size: 26px;
      font-weight: 800;
      color: #fff;
      background: rgba(23, 18, 43, 0.46);
      backdrop-filter: blur(4px);
      padding: 4px 14px;
      border-radius: 999px;
      line-height: 1.4;
      border: 1px solid rgba(255, 255, 255, 0.25);
    }

    .topic-body {
      padding: 30px 28px 32px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .topic-tags { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }

    .topic-body h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--title);
      margin-bottom: 12px;
      letter-spacing: -0.2px;
    }

    .topic-body p {
      font-size: 15px;
      color: var(--body);
      line-height: 1.9;
      margin-bottom: 28px;
    }

    .topic-body .btn {
      align-self: flex-start;
      margin-top: auto;
    }

    /* ========== FAQ ========== */
    .cat-faq { padding: 72px 0; }

    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      box-shadow: 0 6px 18px rgba(23, 18, 43, 0.04);
      transition: box-shadow .2s ease;
      overflow: hidden;
    }

    .faq-item[open] { box-shadow: var(--shadow); }

    .faq-item summary {
      cursor: pointer;
      list-style: none;
      padding: 22px 26px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      font-size: 17px;
      font-weight: 600;
      color: var(--title);
      position: relative;
      transition: background .2s ease;
    }

    .faq-item summary:hover { background: #FBF9FF; }
    .faq-item summary::-webkit-details-marker { display: none; }

    .faq-item[open] summary::before {
      content: '';
      position: absolute;
      left: 0;
      top: 14px;
      bottom: 14px;
      width: 4px;
      background: var(--accent);
      border-radius: 0 4px 4px 0;
    }

    .faq-arrow {
      flex-shrink: 0;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-soft);
      color: var(--primary);
      transition: transform .3s ease, background .2s ease, color .2s ease;
    }

    .faq-item[open] summary .faq-arrow {
      transform: rotate(180deg);
      background: var(--primary);
      color: #fff;
    }

    .faq-answer {
      padding: 0 26px 24px;
      font-size: 15px;
      color: var(--body);
      line-height: 1.9;
    }

    /* ========== CTA ========== */
    .cat-cta {
      position: relative;
      overflow: hidden;
      background: var(--dark);
      padding: 80px 0;
      text-align: center;
    }

    .cat-cta::before {
      content: '';
      position: absolute;
      left: 50%;
      top: 50%;
      width: 520px;
      height: 520px;
      transform: translate(-50%, -50%);
      background: radial-gradient(circle, rgba(139, 92, 246, 0.35), transparent 70%);
      pointer-events: none;
    }

    .cat-cta .container { position: relative; z-index: 2; }

    .cat-cta h2 {
      color: #fff;
      font-size: 28px;
      font-weight: 700;
      letter-spacing: -0.3px;
    }

    .cat-cta p {
      color: rgba(255, 255, 255, 0.72);
      font-size: 16px;
      margin-top: 12px;
    }

    .cta-buttons {
      margin-top: 30px;
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .cat-cta .btn-primary { background: var(--gradient-brand); color: #fff; }
    .cat-cta .btn-primary:hover { box-shadow: 0 12px 30px rgba(139, 92, 246, 0.4); }

    .cat-cta .btn-outline {
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
      border-color: rgba(255, 255, 255, 0.45);
    }

    .cat-cta .btn-outline:hover {
      background: rgba(255, 255, 255, 0.16);
      color: #fff;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: var(--dark);
      color: rgba(255, 255, 255, 0.7);
      padding: 64px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-brand .logo-text { color: #fff; }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.9;
      margin-top: 16px;
      color: rgba(255, 255, 255, 0.6);
      max-width: 320px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col ul li { margin-bottom: 10px; }
    .footer-col a { color: rgba(255, 255, 255, 0.6); font-size: 14px; }
    .footer-col a:hover { color: #fff; }
    .footer-contact li { font-size: 14px; color: rgba(255, 255, 255, 0.6); }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 22px 0;
    }

    .footer-bottom-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }

    .footer-bottom p { font-size: 13px; color: rgba(255, 255, 255, 0.45); }
    .footer-icp { font-size: 13px; color: rgba(255, 255, 255, 0.45); }

    /* ========== Responsive ========== */
    @media (min-width: 768px) and (max-width: 1023px) {
      .hero-title { font-size: 32px; }
      .topic-cover { height: 200px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .cat-cta h2 { font-size: 26px; }
    }

    @media (max-width: 767px) {
      .nav-toggle { display: flex; }

      .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #fff;
        flex-direction: column;
        padding: 32px 24px;
        align-items: stretch;
        transform: translateX(100%);
        visibility: hidden;
        pointer-events: none;
        transition: transform .3s ease, visibility .3s ease;
        box-shadow: -20px 0 50px rgba(23, 18, 43, 0.12);
        overflow-y: auto;
      }

      .main-nav.open {
        transform: translateX(0);
        visibility: visible;
        pointer-events: auto;
      }

      .nav-link {
        padding: 14px 18px;
        font-size: 17px;
        border-radius: 14px;
      }

      .nav-cta {
        margin-top: 12px;
        justify-content: center;
        padding: 14px;
      }

      .cat-hero { padding: 48px 0 32px; }
      .hero-title { font-size: 28px; }
      .hero-desc { font-size: 15px; }

      .section { padding: 48px 0; }
      .section-head h2 { font-size: 24px; }
      .section-head p { font-size: 14px; }

      .cat-stats .stats-tip { font-size: 14px; }
      .tag-strip { flex-direction: column; align-items: center; }
      .tag-strip .data-badge { width: 100%; justify-content: center; }

      .cat-topics { padding: 40px 0 48px; }
      .topic-grid { grid-template-columns: 1fr; gap: 24px; }
      .topic-cover { height: 180px; }
      .topic-body { padding: 24px 22px 28px; }
      .topic-body h3 { font-size: 18px; }
      .topic-body .btn { align-self: stretch; justify-content: center; }

      .cat-faq { padding: 48px 0; }
      .faq-item summary { font-size: 16px; padding: 18px 20px; }
      .faq-answer { padding: 0 20px 20px; font-size: 14px; }

      .cat-cta { padding: 60px 0; }
      .cat-cta h2 { font-size: 24px; }
      .cat-cta p { font-size: 15px; }

      .cta-buttons { flex-direction: column; max-width: 320px; margin-left: auto; margin-right: auto; }
      .cta-buttons .btn { width: 100%; }

      .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
      .footer-contact li { font-size: 13px; }
      .footer-bottom-inner { flex-direction: column; text-align: center; }
    }

    @media (max-width: 520px) {
      .hero-meta { flex-direction: column; }
      .hero-meta .chip { display: inline-block; width: fit-content; }
    }