*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  background:#ffffff;
  color:#1f2937;
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
a{color:#4f46e5;text-decoration:none;transition:color .18s}
a:hover{color:#3730a3;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{font-family:'Lora','Georgia','Times New Roman',serif;color:#111827;line-height:1.22;font-weight:700;letter-spacing:-0.005em}
h1{font-size:clamp(32px,4vw,46px)}
h2{font-size:clamp(24px,2.8vw,34px);margin-top:32px;margin-bottom:14px;font-weight:700}
h3{font-size:20px;margin-top:24px;margin-bottom:10px}
strong,b{font-weight:600;color:#111827}
mark{background:#fef3c7;color:#1f2937;padding:1px 4px;border-radius:3px}

.chn-container{max-width:1200px;margin:0 auto;padding:0 26px}

/* TOPBAR */
.chn-top{background:#f9fafb;border-bottom:1px solid #e5e7eb;font-size:12.5px;color:#6b7280}
.chn-top-in{max-width:1200px;margin:0 auto;padding:8px 26px;display:flex;justify-content:space-between;gap:24px;align-items:center;flex-wrap:wrap}
.chn-top a{color:#4f46e5}
.chn-top-eyebrow{color:#9ca3af;letter-spacing:0.06em}

/* HEADER */
.chn-header{background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:50}
.chn-header-in{max-width:1200px;margin:0 auto;padding:18px 26px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.chn-logo{display:flex;align-items:center;gap:14px;text-decoration:none}
.chn-logo-mark{width:46px;height:46px;background:#eef2ff;color:#4f46e5;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Lora',serif;font-size:24px;font-weight:700;flex-shrink:0;position:relative;border:2px solid #4f46e5}
.chn-logo-mark::after{content:"";position:absolute;width:8px;height:8px;background:#fde68a;border-radius:50%;right:2px;bottom:2px;border:1.5px solid #fff}
.chn-logo-txt{display:flex;flex-direction:column;line-height:1.1}
.chn-logo-name{font-family:'Lora',serif;font-size:21px;color:#111827;font-weight:700;letter-spacing:-0.01em}
.chn-logo-sub{font-size:11.5px;color:#6b7280;margin-top:4px;letter-spacing:0.04em}
.chn-header-right{display:flex;align-items:center;gap:18px}
.chn-search{display:flex;align-items:center;gap:8px;background:#f3f4f6;border:1px solid #e5e7eb;border-radius:8px;padding:9px 14px;width:280px;transition:border-color .2s}
.chn-search:focus-within{border-color:#4f46e5;background:#fff}
.chn-search input{border:none;background:transparent;outline:none;font-size:13.5px;color:#1f2937;font-family:inherit;width:100%}
.chn-search svg{flex-shrink:0}
.chn-btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:8px;font-weight:600;font-size:13.5px;line-height:1;border:none;cursor:pointer;transition:all .2s ease;text-decoration:none;font-family:inherit}
.chn-btn-prim{background:#4f46e5;color:#fff}
.chn-btn-prim:hover{background:#3730a3;color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px -8px rgba(79,70,229,.5);text-decoration:none}
.chn-btn-ghost{background:#fff;color:#1f2937;border:1px solid #e5e7eb}
.chn-btn-ghost:hover{border-color:#4f46e5;color:#4f46e5;text-decoration:none}
.chn-btn-yellow{background:#fef3c7;color:#92400e}
.chn-btn-yellow:hover{background:#fde68a;color:#78350f;text-decoration:none}

/* NAV (categories ribbon) */
.chn-nav{background:#fbfbfd;border-bottom:1px solid #e5e7eb}
.chn-nav-in{max-width:1200px;margin:0 auto;padding:0 26px;display:flex;flex-wrap:wrap;gap:0;align-items:center}
.chn-nav a{padding:12px 16px;font-size:13px;color:#4b5563;font-weight:500;border-bottom:2px solid transparent;transition:all .18s}
.chn-nav a:hover{color:#4f46e5;border-bottom-color:#4f46e5;text-decoration:none}
.chn-nav a.active{color:#4f46e5;border-bottom-color:#4f46e5}

/* HERO */
.chn-hero{padding:60px 0 50px;background:linear-gradient(180deg,#fff 0%,#fbfbfd 100%);position:relative;overflow:hidden}
.chn-hero::before{content:"";position:absolute;top:-80px;right:-60px;width:380px;height:380px;border-radius:50%;background:radial-gradient(closest-side,rgba(79,70,229,.06),transparent 70%);z-index:0}
.chn-hero::after{content:"";position:absolute;top:-40px;left:50%;width:200px;height:200px;border-radius:50%;background:radial-gradient(closest-side,rgba(254,243,199,.6),transparent 70%);z-index:0}
.chn-hero-in{position:relative;z-index:1;text-align:center;max-width:840px;margin:0 auto;padding:0 26px}
.chn-hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:11.5px;color:#4f46e5;letter-spacing:0.18em;text-transform:uppercase;margin-bottom:22px;font-weight:600;background:#eef2ff;padding:7px 16px;border-radius:24px}
.chn-hero-eyebrow::before{content:"?";display:inline-block;width:18px;height:18px;background:#4f46e5;color:#fff;border-radius:50%;font-family:'Lora',serif;font-size:13px;text-align:center;line-height:18px;font-weight:700}
.chn-hero h1{font-size:clamp(34px,4.6vw,52px);line-height:1.08;margin-bottom:18px;font-weight:700}
.chn-hero h1 em{font-style:italic;color:#4f46e5;font-family:'Lora',serif;font-weight:700;position:relative}
.chn-hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:8px;background:#fef3c7;z-index:-1}
.chn-hero-sub{font-size:18px;color:#4b5563;margin-bottom:32px;line-height:1.6;max-width:680px;margin-left:auto;margin-right:auto}
.chn-hero-search{display:flex;gap:10px;background:#fff;border:1.5px solid #e5e7eb;border-radius:14px;padding:6px;max-width:560px;margin:0 auto;transition:border-color .2s}
.chn-hero-search:focus-within{border-color:#4f46e5;box-shadow:0 10px 28px -10px rgba(79,70,229,.25)}
.chn-hero-search input{flex:1;border:none;outline:none;font-size:15px;padding:12px 16px;color:#1f2937;background:transparent;font-family:inherit}
.chn-hero-search input::placeholder{color:#9ca3af}
.chn-hero-tiles{display:flex;gap:24px;flex-wrap:wrap;justify-content:center;margin-top:32px;padding-top:28px;border-top:1px solid #e5e7eb}
.chn-hero-tile{display:flex;align-items:center;gap:10px;font-size:13.5px;color:#6b7280}
.chn-hero-tile b{font-family:'Lora',serif;font-size:22px;color:#4f46e5;font-weight:700}

/* SECTION */
section{padding:64px 0}
.chn-sec-head{margin-bottom:36px}
.chn-sec-head.center{text-align:center;max-width:780px;margin-left:auto;margin-right:auto}
.chn-sec-eyebrow{font-size:11.5px;color:#4f46e5;letter-spacing:0.18em;text-transform:uppercase;margin-bottom:12px;font-weight:600;display:inline-flex;align-items:center;gap:10px}
.chn-sec-eyebrow::before{content:"";width:24px;height:1px;background:#4f46e5}
.chn-sec-head h2{margin-bottom:12px;margin-top:0}
.chn-sec-head p{color:#6b7280;font-size:16.5px}

/* CATEGORY GRID */
.chn-cats{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.chn-cat{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:26px 24px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:10px;transition:all .25s;position:relative;overflow:hidden}
.chn-cat::before{content:"";position:absolute;top:0;left:0;width:0;height:100%;background:#eef2ff;transition:width .3s;z-index:0}
.chn-cat:hover{border-color:#4f46e5;transform:translateY(-3px);box-shadow:0 22px 44px -22px rgba(79,70,229,.18);text-decoration:none}
.chn-cat:hover::before{width:6px}
.chn-cat > *{position:relative;z-index:1}
.chn-cat-num{font-family:'Lora',serif;font-size:22px;color:#4f46e5;line-height:1;font-weight:700;display:flex;align-items:baseline;gap:6px}
.chn-cat-num small{font-size:11.5px;color:#9ca3af;letter-spacing:0.08em;text-transform:uppercase;font-family:'Inter',sans-serif;font-weight:600}
.chn-cat-name{font-family:'Lora',serif;font-size:18.5px;color:#111827;font-weight:700;line-height:1.3}
.chn-cat-desc{font-size:13.5px;color:#6b7280;line-height:1.55}
.chn-cat-count{font-size:11.5px;color:#92400e;background:#fef3c7;padding:3px 10px;border-radius:4px;width:fit-content;font-weight:600;margin-top:auto;letter-spacing:0.02em}

/* TOP QUESTIONS LIST */
.chn-top10{background:#fff;border:1px solid #e5e7eb;border-radius:14px;overflow:hidden}
.chn-q-item{display:grid;grid-template-columns:48px 1fr auto;gap:18px;align-items:center;padding:18px 24px;border-bottom:1px solid #f3f4f6;text-decoration:none;color:inherit;transition:background .15s}
.chn-q-item:last-child{border-bottom:none}
.chn-q-item:hover{background:#fbfbfd;text-decoration:none}
.chn-q-num{font-family:'Lora',serif;font-size:24px;color:#4f46e5;font-weight:700;line-height:1;letter-spacing:-0.02em}
.chn-q-text{font-family:'Lora',serif;font-size:17px;color:#111827;font-weight:600;line-height:1.4}
.chn-q-cat{font-size:11px;color:#6b7280;background:#f3f4f6;padding:4px 10px;border-radius:4px;letter-spacing:0.04em;text-transform:uppercase;font-weight:600;flex-shrink:0}

/* TWO-COL: TOC + CONTENT */
.chn-article-layout{display:grid;grid-template-columns:240px 1fr;gap:48px;align-items:start}
.chn-toc{position:sticky;top:88px;background:#fbfbfd;border:1px solid #e5e7eb;border-radius:12px;padding:22px 22px;font-size:13.5px}
.chn-toc-head{font-family:'Lora',serif;font-size:14px;color:#111827;font-weight:700;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid #e5e7eb;letter-spacing:-0.005em}
.chn-toc ul{list-style:none}
.chn-toc ul li{padding:6px 0;line-height:1.4}
.chn-toc ul li a{color:#4b5563;font-weight:500;display:block;padding:4px 0;border-left:2px solid transparent;padding-left:10px;margin-left:-12px;transition:all .15s}
.chn-toc ul li a:hover{color:#4f46e5;border-left-color:#4f46e5;background:#eef2ff;text-decoration:none}

/* Q&A blocks */
.chn-qa{margin-bottom:36px;background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:30px 32px;scroll-margin-top:90px}
.chn-qa-num{display:inline-block;font-family:'Lora',serif;font-size:13px;color:#4f46e5;letter-spacing:0.08em;text-transform:uppercase;font-weight:700;margin-bottom:10px;background:#eef2ff;padding:5px 12px;border-radius:5px}
.chn-qa h2,.chn-qa h3{font-family:'Lora',serif;font-size:22px;color:#111827;margin-top:0;margin-bottom:14px;font-weight:700;line-height:1.3}
.chn-qa p{color:#374151;margin-bottom:14px;font-size:15.5px;line-height:1.7}
.chn-qa p:last-child{margin-bottom:0}
.chn-qa ul,.chn-qa ol{padding-left:0;margin:14px 0;list-style:none}
.chn-qa ul li,.chn-qa ol li{padding:6px 0 6px 28px;position:relative;color:#374151;font-size:15px}
.chn-qa ul li::before{content:"";position:absolute;left:0;top:14px;width:14px;height:2px;background:#4f46e5}
.chn-qa ol{counter-reset:olist}
.chn-qa ol li{counter-increment:olist;font-weight:500}
.chn-qa ol li::before{content:counter(olist) ".";position:absolute;left:0;top:6px;color:#4f46e5;font-family:'Lora',serif;font-weight:700;width:auto}
.chn-qa-tip{background:#fef3c7;border-left:3px solid #f59e0b;padding:14px 18px;margin:16px 0;border-radius:0 8px 8px 0;font-size:14.5px;color:#92400e}
.chn-qa-tip b{color:#78350f}

/* RELATED */
.chn-related{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:20px}
.chn-related a{display:block;padding:16px 18px;background:#fbfbfd;border:1px solid #e5e7eb;border-radius:10px;text-decoration:none;color:#1f2937;transition:all .2s;font-size:14.5px;line-height:1.4;font-weight:500;font-family:'Lora',serif}
.chn-related a:hover{border-color:#4f46e5;color:#4f46e5;transform:translateY(-2px);text-decoration:none}

/* CTA */
.chn-cta{background:linear-gradient(135deg,#4f46e5 0%,#3730a3 100%);color:#fff;padding:60px 36px;border-radius:18px;text-align:center;position:relative;overflow:hidden;max-width:1148px;margin:60px auto;margin-left:26px;margin-right:26px}
.chn-cta::before{content:"?";position:absolute;font-family:'Lora',serif;font-size:320px;color:rgba(255,255,255,.05);font-weight:700;top:-40px;right:40px;line-height:1}
.chn-cta-in{position:relative;z-index:1}
.chn-cta h2{color:#fff;margin-bottom:14px;font-size:clamp(26px,3vw,38px);font-weight:700;margin-top:0}
.chn-cta p{color:#c7d2fe;font-size:17px;margin-bottom:28px;max-width:680px;margin-left:auto;margin-right:auto}
.chn-cta .chn-btn-prim{background:#fef3c7;color:#92400e}
.chn-cta .chn-btn-prim:hover{background:#fde68a;color:#78350f;box-shadow:0 12px 28px -10px rgba(254,243,199,.5)}

/* TOPIC PAGE */
.chn-topic-intro{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:32px 36px;margin-bottom:36px}
.chn-topic-intro p{color:#374151;font-size:16px;line-height:1.7}
.chn-topic-intro p:last-child{margin-bottom:0}

.chn-q-list{display:flex;flex-direction:column;gap:0}
.chn-q-list .chn-q-item{background:#fff;border:1px solid #e5e7eb;border-bottom:none;border-radius:0}
.chn-q-list .chn-q-item:first-child{border-radius:12px 12px 0 0}
.chn-q-list .chn-q-item:last-child{border-radius:0 0 12px 12px;border-bottom:1px solid #e5e7eb}

/* FOOTER */
.chn-footer{background:#1f2937;color:#9ca3af;padding:60px 0 28px}
.chn-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.chn-footer h4{color:#fff;font-family:'Lora',serif;font-size:16px;font-weight:700;margin-bottom:16px;letter-spacing:-0.005em}
.chn-footer p,.chn-footer li{font-size:13.5px;line-height:1.7;color:#9ca3af}
.chn-footer ul{list-style:none}
.chn-footer ul li{padding:3px 0}
.chn-footer a{color:#c7d2fe;transition:color .18s}
.chn-footer a:hover{color:#fde68a;text-decoration:none}
.chn-footer-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.chn-footer-logo-mark{width:42px;height:42px;background:#fef3c7;color:#4f46e5;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Lora',serif;font-size:20px;font-weight:700;border:2px solid #4f46e5}
.chn-footer-logo-name{font-family:'Lora',serif;font-size:19px;color:#fff;font-weight:700}
.chn-footer-bottom{border-top:1px solid #374151;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:12.5px;color:#6b7280}

/* BREADCRUMB */
.chn-bc{padding:14px 0;font-size:13px;color:#6b7280;background:#fbfbfd;border-bottom:1px solid #e5e7eb}
.chn-bc a{color:#4f46e5}
.chn-bc span.sep{margin:0 7px;color:#d1d5db}

/* PAGE HERO (interior) */
.chn-ph{background:linear-gradient(180deg,#fff 0%,#fbfbfd 100%);padding:46px 0 32px;border-bottom:1px solid #e5e7eb;position:relative}
.chn-ph::after{content:"";position:absolute;top:10px;right:8%;width:120px;height:120px;border-radius:50%;background:radial-gradient(closest-side,rgba(254,243,199,.5),transparent 70%)}
.chn-ph > div{position:relative;z-index:1}
.chn-ph h1{font-size:clamp(28px,3.6vw,42px);margin-bottom:10px;font-weight:700;line-height:1.18}
.chn-ph p{color:#6b7280;font-size:17px;max-width:760px}
.chn-ph .chn-hero-eyebrow{margin-bottom:14px}

/* CONTACT */
.chn-contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.chn-contact-card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:30px 30px}
.chn-contact-card h3{font-family:'Lora',serif;font-size:21px;margin-bottom:18px;color:#111827;font-weight:700;margin-top:0}
.chn-contact-row{display:flex;gap:14px;padding:11px 0;align-items:flex-start;border-bottom:1px solid #f3f4f6}
.chn-contact-row:last-of-type{border-bottom:none}
.chn-contact-ico{width:38px;height:38px;background:#eef2ff;color:#4f46e5;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;font-family:'Lora',serif;font-weight:700}
.chn-contact-row b{display:block;color:#111827;font-size:13.5px;margin-bottom:3px;font-weight:600}
.chn-contact-row span{font-size:13.5px;color:#6b7280}

/* RESPONSIVE */
@media(max-width:1024px){
  .chn-article-layout{grid-template-columns:1fr;gap:24px}
  .chn-toc{position:static}
}
@media(max-width:768px){
  .chn-hero{padding:46px 0 40px}
  .chn-hero-tiles{gap:14px}
  .chn-search{display:none}
  .chn-footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .chn-top-in{flex-direction:column;gap:6px;text-align:center;padding:8px 16px}
  .chn-header-in{flex-wrap:wrap;gap:14px;padding:14px 18px}
  .chn-nav-in{flex-wrap:wrap;padding:0 14px}
  .chn-nav a{padding:10px 12px;font-size:12.5px}
  section{padding:48px 0}
  .chn-q-item{grid-template-columns:36px 1fr;gap:12px;padding:14px 18px}
  .chn-q-cat{grid-column:2}
  .chn-qa{padding:24px 22px}
  .chn-cta{margin:36px 16px;padding:46px 24px}
  .chn-contact-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .chn-footer-grid{grid-template-columns:1fr}
  .chn-hero h1{font-size:30px}
  .chn-btn{padding:10px 16px;font-size:12.5px}
}