:root{--bg: #ffffff;--surface: #f5f5f5;--surface-warm: #fafafa;--fg: #171a20;--muted: #707072;--meta: #9e9ea0;--border: #cacacb;--border-soft: #e5e5e5;--accent: #ff6900;--accent-on: #ffffff;--accent-hover: #e85d00;--accent-soft: #fff3ec;--success: #007d48;--footer-bg: #171a20;--footer-text: #ffffff;--footer-muted: rgba(255, 255, 255, .62);--footer-border: rgba(255, 255, 255, .08);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;--radius-sm: 8px;--radius-md: 14px;--radius-card: 16px;--radius-pill: 30px;--elev-card: 0 1px 3px rgba(0, 0, 0, .05), 0 8px 24px rgba(0, 0, 0, .05);--elev-raised: 0 6px 16px rgba(0, 0, 0, .08), 0 16px 40px rgba(0, 0, 0, .1);--elev-nav: 0 2px 8px rgba(0, 0, 0, .06);--focus-ring: 0 0 0 2px rgba(255, 105, 0, .55);--section-y: 80px;--gutter: 24px;--maxw: 1200px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--fg);font-family:var(--font-sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em}p{margin:0}ul{margin:0;padding:0;list-style:none}.shell{width:min(var(--maxw),calc(100% - 48px));margin:0 auto}.section{padding:var(--section-y) 0}.band{background:var(--surface)}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:var(--radius-pill);background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.h-section{font-size:30px;font-weight:700}.section-head{max-width:720px;margin-bottom:40px}.section-head p{margin-top:12px;color:var(--muted);font-size:17px}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-soft)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}.brand-mark{width:30px;height:30px;border-radius:9px;background:var(--accent);color:var(--accent-on);display:grid;place-items:center;font-size:15px;font-weight:800}.brand small{display:block;font-size:11px;font-weight:500;color:var(--meta);letter-spacing:.08em;text-transform:uppercase}.nav{display:flex;align-items:center;gap:26px}.nav a{font-size:14px;font-weight:500;color:var(--muted)}.nav a:hover,.nav a.active{color:var(--fg)}.header-cta{display:flex;align-items:center;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-pill);padding:13px 22px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s}.btn-primary{background:var(--accent);color:var(--accent-on)}.btn-primary:hover{background:var(--accent-hover)}.btn-ghost{border-color:var(--border);background:#fff;color:var(--fg)}.btn-ghost:hover{border-color:var(--fg)}.btn-sm{padding:9px 16px;font-size:14px}.hero{padding:72px 0 64px;border-bottom:1px solid var(--border-soft)}.hero h1{font-size:54px;font-weight:700;max-width:900px;margin-top:20px}.hero .lede{margin-top:22px;max-width:680px;color:var(--muted);font-size:19px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:56px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius-card);overflow:hidden}.hero-stat{background:#fff;padding:22px 20px}.hero-stat strong{display:block;font-size:30px;font-weight:700;letter-spacing:-.03em}.hero-stat span{display:block;margin-top:4px;font-size:13px;color:var(--muted)}.grid{display:grid;gap:20px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.card{background:#fff;border:1px solid var(--border-soft);border-radius:var(--radius-card);overflow:hidden;transition:transform .25s cubic-bezier(.25,.1,.25,1),box-shadow .25s}.card:hover{transform:translateY(-3px);box-shadow:var(--elev-raised)}.card-media{aspect-ratio:4 / 3;background:var(--surface);overflow:hidden}.card-media img{width:100%;height:100%;object-fit:cover}.card-body{padding:20px}.card-body h3{font-size:18px;font-weight:600}.card-body p{margin-top:8px;color:var(--muted);font-size:14px}.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}.tag{padding:4px 10px;border-radius:var(--radius-pill);background:var(--surface);font-size:12px;color:var(--muted)}.grades{margin-top:10px;color:var(--accent);font-size:13px;font-weight:600}.table-wrap{overflow-x:auto;border:1px solid var(--border-soft);border-radius:var(--radius-card)}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--border-soft);vertical-align:top}th{background:var(--surface);font-weight:600;font-size:13px;color:var(--muted);letter-spacing:.02em}tbody tr:last-child td{border-bottom:0}.split{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}.split img{border-radius:var(--radius-card)}.facts{display:grid;gap:14px;margin-top:24px}.fact{display:flex;gap:12px}.fact b{color:var(--accent)}.fact span{color:var(--muted);font-size:15px}.checklist{display:grid;gap:12px;margin-top:20px}.checklist li{display:flex;gap:10px;font-size:15px;color:var(--muted)}.checklist li b{color:var(--fg)}.faq-item{border-bottom:1px solid var(--border-soft);padding:18px 0}.faq-item h3{font-size:16px;font-weight:600}.faq-item p{margin-top:8px;color:var(--muted);font-size:15px}.cta-band{background:var(--footer-bg);color:var(--footer-text);padding:64px 0}.cta-band h2{font-size:32px}.cta-band p{margin-top:14px;color:var(--footer-muted);max-width:620px}.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.btn-invert{background:var(--accent);color:var(--accent-on)}.btn-outline-invert{border-color:#ffffff4d;color:#fff}.page-head{padding:56px 0 8px}.page-head h1{font-size:42px;margin-top:16px}.page-head .lede{margin-top:16px;max-width:720px;color:var(--muted)}.post-body{max-width:780px}.post-body p{margin-top:20px;font-size:17px;color:#3a3d42;line-height:1.75}.post-meta{margin-top:12px;color:var(--meta);font-size:13px}.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:64px 0 40px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}.site-footer h4{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--footer-muted)}.footer-list{margin-top:14px;display:grid;gap:9px}.footer-list a,.footer-list span{font-size:14px;color:var(--footer-muted)}.footer-list a:hover{color:#fff}.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--footer-border);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--footer-muted)}@media(max-width:980px){:root{--section-y: 56px}.hero h1{font-size:38px}.grid-3{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr;gap:28px}.hero-stats,.footer-grid{grid-template-columns:repeat(2,1fr)}.nav{display:none}}@media(max-width:620px){:root{--section-y: 40px}.shell{width:calc(100% - 32px)}.hero{padding:44px 0 40px}.hero h1{font-size:30px}.grid-3,.grid-2{grid-template-columns:1fr}.h-section{font-size:24px}.footer-grid{grid-template-columns:1fr}.hero-stat strong{font-size:24px}}