:root{--red:#c7282f;--dark:#0e0f11;--ink:#171717;--muted:#6d737c;--line:#eceef1;--bg:#f7f7f5;--gold:#d6aa4f;--card:#fff}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}a{color:inherit;text-decoration:none}.wrap{max-width:1180px;margin:0 auto;padding:0 24px}.topbar{background:#111;color:#cfcfcf;font-size:13px}.topbar .wrap{height:36px;display:flex;align-items:center;justify-content:space-between}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{height:74px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:12px;min-width:250px}.brand-mark{width:44px;height:44px;border-radius:50%;background:#111;color:#fff;display:grid;place-items:center;font-weight:800;letter-spacing:-1px}.brand b{display:block;font-size:20px}.brand small{display:block;color:#777;font-size:10px;letter-spacing:.08em}nav{display:flex;gap:26px;flex:1;justify-content:center}nav a{font-size:15px;color:#333}.active,nav a:hover{color:var(--red)}.nav-cta{background:var(--red);color:#fff;padding:12px 18px;border-radius:999px;font-weight:700}.menu-btn{display:none}.hero{position:relative;min-height:650px;background:#0a0b0d;color:#fff;overflow:hidden}.hero-bg{position:absolute;inset:0;background:radial-gradient(circle at 75% 25%,rgba(199,40,47,.45),transparent 32%),linear-gradient(120deg,#090909 0%,#111 45%,#2b1719 100%)}.hero-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.7),rgba(0,0,0,.2)),repeating-linear-gradient(135deg,rgba(255,255,255,.04) 0 1px,transparent 1px 18px)}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;min-height:650px}.eyebrow,.section-kicker{color:var(--red);font-weight:800;letter-spacing:.12em;font-size:13px;text-transform:uppercase}.hero h1{font-size:68px;line-height:1.06;margin:18px 0 16px;letter-spacing:-.05em}.lead{font-size:26px;color:#f1d36d;font-weight:800;margin:0 0 12px}.hero-note{color:#ddd;font-size:18px;max-width:680px}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:14px 22px;font-weight:800;border:1px solid transparent}.primary{background:var(--red);color:#fff}.ghost{border-color:rgba(255,255,255,.38);color:#fff}.outline{border-color:#ddd;color:#222;background:#fff}.hero-actions{display:flex;gap:14px;margin:28px 0}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}.metrics span{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);padding:16px;border-radius:16px;color:#ddd}.metrics b{display:block;color:#fff;font-size:24px}.hero-card{align-self:end;padding-bottom:48px}.photo-frame{background:linear-gradient(135deg,rgba(255,255,255,.16),rgba(255,255,255,.04));border:1px solid rgba(255,255,255,.18);border-radius:28px;padding:18px;box-shadow:0 30px 90px rgba(0,0,0,.45)}.mock-photo{height:430px;border-radius:20px;background:linear-gradient(135deg,#242424,#111 55%,#4a1c1f);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff;position:relative;overflow:hidden}.mock-photo:after{content:"";position:absolute;width:220px;height:420px;border-radius:120px;background:rgba(255,255,255,.08);right:35px;top:20px;transform:rotate(18deg)}.mock-photo span{font-size:34px;font-weight:900;z-index:1}.mock-photo small{z-index:1;color:#ccc}.hero-mini{margin:-46px 24px 0;background:#fff;color:#111;border-radius:18px;padding:20px;position:relative;box-shadow:0 20px 55px rgba(0,0,0,.25)}.section{padding:86px 0}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:30px}.section-head h2{font-size:40px;line-height:1.15;margin:8px 0 0;letter-spacing:-.03em}.center{text-align:center;justify-content:center}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.course-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:0 14px 45px rgba(0,0,0,.05);transition:.25s}.course-card:hover{transform:translateY(-6px);box-shadow:0 24px 70px rgba(0,0,0,.09)}.course-img{height:180px;background:linear-gradient(135deg,#f2f2f2,#dedede);display:flex;align-items:end;padding:20px;color:#111;font-weight:900}.course-body{padding:22px}.course-body h3{margin:0 0 8px;font-size:22px}.course-body p{color:var(--muted);min-height:76px}.chips span,.tag{display:inline-block;background:#fff1f1;color:#b91d24;border:1px solid #ffd5d7;padding:6px 10px;border-radius:999px;font-size:12px}.course-body a,.article-body a{color:var(--red);font-weight:800}.dark-band{background:#111;color:#fff;padding:62px 0}.reason-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}.reason-grid div{border-left:1px solid rgba(255,255,255,.16);padding-left:24px}.reason-grid span{font-size:36px;color:var(--red);font-weight:900}.reason-grid h3{font-size:24px;margin:8px 0}.reason-grid p{color:#cfcfcf}.gallery-section{background:var(--bg)}.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.gallery-item,.school-photo,.map-card{min-height:190px;border-radius:18px;background:linear-gradient(135deg,#e8e6e1,#cfc9c1);display:grid;place-items:center;color:#615d57;font-weight:900}.gallery-item:nth-child(2n){background:linear-gradient(135deg,#d9d6d0,#bdb7ae)}.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:54px;align-items:center}.school-photo{min-height:350px}.about-points{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.about-points span{background:#f6f6f6;border:1px solid var(--line);padding:10px 14px;border-radius:12px;font-weight:700}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.article-card{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#fff;box-shadow:0 14px 45px rgba(0,0,0,.05)}.article-cover{height:142px;background:linear-gradient(135deg,#191919,#85242a);color:#fff;display:flex;align-items:end;padding:18px;font-weight:900}.article-body{padding:20px}.article-body time{color:#999;font-size:13px}.article-body h3{font-size:21px;line-height:1.35}.article-body p{color:var(--muted)}.cta-section{padding:70px 0;background:#111}.cta-box{background:linear-gradient(135deg,#c7282f,#711418);color:#fff;border-radius:28px;padding:56px;text-align:center}.cta-box h2{font-size:42px;margin:0}.footer{background:#0b0b0c;color:#ddd;padding-top:58px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:40px}.footer-brand{font-size:28px;font-weight:900;color:#fff}.footer a{display:block;color:#bbb;margin:8px 0}.copyright{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding:20px;margin-top:44px;color:#888}.float-actions{position:fixed;right:18px;bottom:24px;display:flex;flex-direction:column;gap:8px;z-index:30}.float-actions a{background:#111;color:#fff;border-radius:999px;padding:10px 14px;font-size:13px}.page-hero{background:#111;color:#fff;padding:86px 0}.page-hero h1{font-size:54px;margin:12px 0}.page-hero p{font-size:20px;color:#d5d5d5}.detail-list{display:grid;gap:22px}.detail-card{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:30px}.detail-card h2{font-size:32px;margin:12px 0}.detail-meta{background:#fafafa;border-radius:18px;padding:22px}.big{grid-template-columns:repeat(2,1fr)}.article-page{padding:80px 0}.narrow{max-width:820px}.article-page h1{font-size:46px;line-height:1.2}.article-meta,.summary{color:var(--muted)}.content{font-size:20px}.faq-box{background:#fafafa;border:1px solid var(--line);border-radius:18px;padding:24px;margin-top:32px}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.contact-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:34px}.map-card{min-height:300px}
@media(max-width:900px){.topbar span,nav,.nav-cta{display:none}.menu-btn{display:block;margin-left:auto;background:#111;color:#fff;border:0;border-radius:10px;padding:8px 12px}.brand{min-width:auto}.hero-grid,.split,.detail-card,.contact-grid{grid-template-columns:1fr}.hero{min-height:auto}.hero-grid{min-height:auto;padding:64px 24px}.hero h1{font-size:44px}.lead{font-size:20px}.metrics{grid-template-columns:repeat(2,1fr)}.course-grid,.article-grid,.big{grid-template-columns:1fr}.reason-grid,.gallery{grid-template-columns:repeat(2,1fr)}.section{padding:58px 0}.section-head{align-items:flex-start}.photo-frame{display:none}.footer-grid{grid-template-columns:1fr}.float-actions{right:10px}.cta-box{padding:34px 20px}.cta-box h2{font-size:30px}.page-hero h1{font-size:40px}}


/* Release 3.1 优化：真实官网体验、移动端、转化入口、GEO阅读 */
html{scroll-behavior:smooth}
body.open-menu nav{display:flex;position:absolute;left:16px;right:16px;top:82px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 20px 60px rgba(0,0,0,.16);flex-direction:column;z-index:50}
body.open-menu nav a{padding:10px 12px;border-radius:10px}
body.open-menu nav a:hover{background:#fff3f3}
.trust-strip{background:#151515;color:#fff;padding:20px 0;border-top:1px solid rgba(255,255,255,.08)}
.trust-strip .wrap{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.trust-item{display:flex;gap:12px;align-items:center}
.trust-icon{width:38px;height:38px;border-radius:12px;background:#2a2a2a;color:#f3cf79;display:grid;place-items:center;font-weight:900}
.trust-item b{display:block;font-size:18px}
.trust-item span{display:block;color:#b8b8b8;font-size:13px}
.geo-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:34px;box-shadow:0 18px 60px rgba(0,0,0,.06)}
.geo-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.geo-tags a{background:#f8f8f8;border:1px solid var(--line);padding:10px 14px;border-radius:999px;font-weight:700}
.geo-tags a:hover{border-color:#c7282f;color:#c7282f}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.process-step{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}
.process-step em{font-style:normal;color:#c7282f;font-size:32px;font-weight:900}
.process-step h3{margin:8px 0}
.mobile-bottom{display:none}
.article-toc{background:#fafafa;border:1px solid var(--line);border-radius:18px;padding:18px;margin:22px 0}
.article-toc a{display:inline-block;margin:4px 12px 4px 0;color:#c7282f;font-weight:700}
.course-card.featured{border-color:#ffd2d4;background:linear-gradient(180deg,#fff,#fff8f8)}
.admin-hint{background:#111;color:#fff;border-radius:18px;padding:22px;margin-top:20px}
@media(max-width:900px){
  .trust-strip .wrap,.process{grid-template-columns:1fr}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .metrics{gap:8px}
  .metrics span{padding:12px}
  .course-body p{min-height:auto}
  .site-header{bottom:auto}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);z-index:60;box-shadow:0 -8px 30px rgba(0,0,0,.08)}
  .mobile-bottom a{text-align:center;padding:10px 6px;font-size:13px;font-weight:800}
  .mobile-bottom a.primary-mobile{background:#c7282f;color:#fff}
  .float-actions{display:none}
  body{padding-bottom:52px}
}


/* Release 4.0：整体重构补充 */
.hero-v4 .hero h1{font-size:72px}
.target-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.target-tabs a{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);color:#fff;border-radius:999px;padding:10px 14px;font-weight:800}
.audience-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.audience-card{background:#111;color:#fff;border-radius:24px;padding:28px;min-height:170px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 18px 60px rgba(0,0,0,.08)}
.audience-card:nth-child(2){background:#c7282f}.audience-card:nth-child(3){background:#2a2a2a}.audience-card:nth-child(4){background:#f7f2e8;color:#111}
.audience-card b{font-size:24px}.audience-card span{color:inherit;opacity:.78}
.courses-section{background:#fff}
.mini-list{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.mini-list span{background:#f6f6f6;border:1px solid #eee;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700;color:#555}
.mini-list.in-detail span{background:#fff;border-color:#ffd4d6;color:#b91d24}
.reasons-v4 .section-head h2{color:#fff}
.story-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-auto-rows:180px;gap:16px}
.story-big,.story-small{border-radius:22px;background:linear-gradient(135deg,#2b2b2b,#111);color:#fff;display:grid;place-items:center;font-weight:900;position:relative;overflow:hidden}
.story-big{grid-row:span 2;background:linear-gradient(135deg,#efece5,#c8beb2);color:#4d4740}
.story-small:nth-child(2){background:linear-gradient(135deg,#7d1f24,#151515)}
.story-small:nth-child(3){background:linear-gradient(135deg,#333,#111)}
.story-small:nth-child(4){background:linear-gradient(135deg,#c7282f,#111)}
.story-small:nth-child(5){background:linear-gradient(135deg,#e9e6df,#b9b1a5);color:#4d4740}
.process.compact{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){
 .audience-grid{grid-template-columns:1fr}
 .story-grid{grid-template-columns:1fr;grid-auto-rows:160px}
 .story-big{grid-row:auto}
 .process.compact{grid-template-columns:1fr}
 .target-tabs a{flex:1;text-align:center}
}


/* Release 5.0 Brand Redesign */
.release-5 .topbar{background:#070707}
.brand-hero{position:relative;min-height:760px;background:#080808;color:#fff;overflow:hidden}
.brand-hero-bg{position:absolute;inset:0;background:
 radial-gradient(circle at 78% 25%,rgba(199,40,47,.42),transparent 30%),
 radial-gradient(circle at 30% 95%,rgba(214,170,79,.18),transparent 25%),
 linear-gradient(135deg,#050505,#141414 58%,#2b0f12)}
.brand-hero-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.78),rgba(0,0,0,.12)),repeating-linear-gradient(115deg,rgba(255,255,255,.035) 0 1px,transparent 1px 20px)}
.brand-hero-grid{position:relative;z-index:1;min-height:760px;display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.brand-label{display:inline-flex;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:9px 14px;color:#f1d36d;font-weight:900;letter-spacing:.08em;font-size:12px}
.brand-copy h1{font-size:86px;line-height:.98;margin:24px 0 18px;letter-spacing:-.07em}
.brand-lead{font-size:26px;color:#fff;font-weight:900;margin:0 0 12px}
.brand-desc{color:#d8d8d8;font-size:18px;max-width:680px}
.brand-proof{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:30px}
.brand-proof span{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);border-radius:18px;padding:16px}
.brand-proof b{display:block;font-size:28px}.brand-proof small{color:#c8c8c8}
.brand-visual{position:relative;height:540px}
.visual-main{position:absolute;inset:0 30px 40px 0;border-radius:34px;background:linear-gradient(135deg,#e7dfd2,#8e8479 45%,#201b19);box-shadow:0 30px 100px rgba(0,0,0,.45);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:32px;text-align:center;overflow:hidden}
.visual-main:before{content:"";position:absolute;width:260px;height:620px;background:rgba(255,255,255,.12);border-radius:140px;transform:rotate(22deg);right:40px;top:-30px}
.visual-main span,.visual-main small{position:relative;z-index:1}.visual-main small{font-size:14px;color:#eee;margin-top:8px}
.visual-stack{position:absolute;border-radius:22px;padding:22px;color:#fff;font-weight:900;box-shadow:0 20px 60px rgba(0,0,0,.28)}
.visual-stack.one{right:0;bottom:0;background:#c7282f}.visual-stack.two{left:-18px;bottom:46px;background:#111;border:1px solid rgba(255,255,255,.15)}
.brand-nav{background:#fff;margin-top:-44px;position:relative;z-index:5}.brand-nav-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;background:#fff;border:1px solid var(--line);border-radius:28px;padding:14px;box-shadow:0 18px 60px rgba(0,0,0,.12)}
.brand-nav-grid a{padding:22px;border-radius:20px;background:#fafafa}
.brand-nav-grid a:hover{background:#111;color:#fff}.brand-nav-grid b{display:block;font-size:20px}.brand-nav-grid span{display:block;color:#777;margin-top:8px;font-size:13px}.brand-nav-grid a:hover span{color:#ddd}
.brand-section{background:#fff}
.brand-reasons{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:18px}
.brand-reason{background:#111;color:#fff;border-radius:26px;padding:28px;min-height:210px}
.brand-reason.large{grid-row:span 2;background:linear-gradient(135deg,#c7282f,#111);min-height:438px;display:flex;flex-direction:column;justify-content:flex-end}
.brand-reason span{color:#f1d36d;font-size:32px;font-weight:900}.brand-reason h3{font-size:28px;margin:8px 0}.brand-reason p{color:#ddd}
.course-grid.premium .course-card{border-radius:28px}.course-grid.premium .course-img{height:210px}
.material-section{background:#f7f5f1}
.material-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-auto-rows:190px;gap:18px}
.material-card{border-radius:28px;padding:24px;display:flex;flex-direction:column;justify-content:flex-end;background:#111;color:#fff;overflow:hidden;position:relative}
.material-card:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(0,0,0,.55))}
.material-card b,.material-card span,.material-card small{position:relative;z-index:1}.material-card b{font-size:26px}.material-card span{color:#f1d36d;font-weight:900}.material-card small{color:#ddd}
.material-card.m1{grid-row:span 2;background:linear-gradient(135deg,#d7cfc1,#50483f)}
.material-card.m2{background:linear-gradient(135deg,#c7282f,#111)}.material-card.m3{background:linear-gradient(135deg,#1c1c1c,#4a1d20)}.material-card.m4{background:linear-gradient(135deg,#efe6d6,#777064)}.material-card.m5{background:linear-gradient(135deg,#111,#333)}.material-card.m6{background:linear-gradient(135deg,#892028,#111)}
.geo-brand{background:#111;color:#fff}.geo-brand h2{font-size:42px}.geo-brand p{color:#d4d4d4}
.geo-map{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.geo-map div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.13);border-radius:18px;padding:22px;font-weight:900;text-align:center}.geo-map div:first-child{grid-column:span 2;background:#c7282f}
.faq-section{background:#fff}.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.faq-item{border:1px solid var(--line);border-radius:24px;padding:26px;background:#fff}.faq-item h3{font-size:22px;margin:0 0 8px}.faq-item p{color:#666}
.premium-cta{background:linear-gradient(135deg,#111,#c7282f)}
.dashboard-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:0 0 24px}.dashboard-cards div{background:#111;color:#fff;border-radius:16px;padding:18px}.dashboard-cards b{display:block;font-size:22px}.dashboard-cards span{color:#cfcfcf}
@media(max-width:900px){
 .brand-hero{min-height:auto}.brand-hero-grid{grid-template-columns:1fr;min-height:auto;padding:60px 24px 80px}.brand-copy h1{font-size:52px}.brand-lead{font-size:20px}.brand-proof{grid-template-columns:repeat(2,1fr)}.brand-visual{height:320px}.visual-main{inset:0}.visual-stack{display:none}.brand-nav{margin-top:-30px}.brand-nav-grid{grid-template-columns:1fr}.brand-reasons,.material-grid,.faq-grid{grid-template-columns:1fr}.brand-reason.large{grid-row:auto;min-height:280px}.material-card.m1{grid-row:auto}.geo-map{grid-template-columns:1fr}.geo-map div:first-child{grid-column:auto}.dashboard-cards{grid-template-columns:1fr}
}


/* Release 6.0 Core：后台、留资、AI/GEO结构完善 */
.lead-form-home{background:#f7f5f1}
.lead-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:30px;padding:34px;box-shadow:0 20px 70px rgba(0,0,0,.06)}
.lead-box h2{font-size:38px;margin:8px 0}
.lead-form{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.lead-form input,.lead-form select{width:100%;border:1px solid #ddd;border-radius:14px;padding:14px;font:inherit;background:#fff}
.lead-form button{grid-column:span 2;border:0}
.article-card:hover,.course-card:hover,.brand-nav-grid a:hover{transform:translateY(-4px)}
.article-card,.course-card,.brand-nav-grid a{transition:.25s ease}
@media(max-width:900px){.lead-box,.lead-form{grid-template-columns:1fr}.lead-form button{grid-column:auto}}


/* Release 7.0 Polish：动画、课程详情、文章转化、移动端精修 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-visible{opacity:1;transform:none}
.backtop{position:fixed;right:18px;bottom:150px;width:42px;height:42px;border:0;border-radius:999px;background:#111;color:#fff;font-size:20px;display:none;z-index:70;box-shadow:0 12px 30px rgba(0,0,0,.18)}
.backtop.show{display:block}
.course-page-hero{background:radial-gradient(circle at 80% 20%,rgba(199,40,47,.35),transparent 30%),#111}
.selector-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;background:#fff;border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:0 18px 60px rgba(0,0,0,.06)}
.selector-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.selector-grid a{background:#111;color:#fff;border-radius:16px;padding:18px;font-weight:900}.selector-grid a:nth-child(2){background:#c7282f}.selector-grid a:nth-child(3){background:#f7f2e8;color:#111}.selector-grid a:nth-child(4){background:#2a2a2a}
.premium-detail{gap:30px}.rich-course{align-items:start}.course-main h2{font-size:40px}.course-desc{font-size:18px;color:#555}.course-goal,.learning-block,.course-faq{margin-top:22px;padding-top:18px;border-top:1px solid #eee}.course-goal b,.learning-block b,.course-faq>b{display:block;font-size:18px;margin-bottom:8px}.course-faq details{background:#fafafa;border:1px solid #eee;border-radius:14px;margin:10px 0;padding:14px}.course-faq summary{cursor:pointer;font-weight:900}.sticky-meta{position:sticky;top:96px}.sticky-meta .btn{width:100%;margin-top:10px}
.related-box{margin-top:30px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.related-box a{display:block;padding:10px 0;border-bottom:1px solid #eee;color:#c7282f;font-weight:800}.related-box a:last-child{border-bottom:0}.article-cta{margin-top:30px;background:linear-gradient(135deg,#111,#c7282f);color:#fff;border-radius:22px;padding:28px}.article-cta p{color:#eee}
.contact-form{grid-template-columns:1fr}.contact-form button{grid-column:auto}.lead-form select{min-height:48px}
.site-header{transition:box-shadow .25s ease}.site-header:hover{box-shadow:0 12px 36px rgba(0,0,0,.06)}
.btn{transition:transform .2s ease,box-shadow .2s ease}.btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(199,40,47,.18)}
@media(max-width:900px){
 .selector-box,.selector-grid{grid-template-columns:1fr}
 .sticky-meta{position:static}
 .course-main h2{font-size:32px}
 .backtop{bottom:70px;right:12px}
 .brand-copy h1{font-size:46px}
 .brand-proof span{padding:12px}
}