:root{--blue:#0b294d;--blue2:#123b6d;--red:#d71920;--light:#f5f8fc;--text:#172033;--muted:#667085;--white:#fff;--shadow:0 18px 50px rgba(13,43,79,.12);--radius:24px}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#fff;line-height:1.65}a{text-decoration:none;color:inherit}.wrap{width:min(1180px,calc(100% - 40px));margin:auto}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);box-shadow:0 8px 24px rgba(0,0,0,.05)}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0}.brand img{height:58px;max-width:210px;object-fit:contain}nav{display:flex;gap:18px;align-items:center;flex-wrap:wrap}nav a{font-weight:800;color:var(--blue);font-size:14px}.login-btn{background:var(--red);color:#fff!important;padding:10px 14px;border-radius:999px}
.hero{position:relative;min-height:660px;display:flex;align-items:center;color:#fff;background:var(--img) center/cover no-repeat;overflow:hidden}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,41,77,.94),rgba(11,41,77,.66),rgba(11,41,77,.12))}.hero .wrap{position:relative;z-index:2}.kicker{display:inline-block;text-transform:uppercase;letter-spacing:3px;font-size:12px;font-weight:900;color:#ffccd0;margin-bottom:14px}
h1,h2,h3{line-height:1.1;margin:0 0 16px;color:var(--blue)}.hero h1{color:#fff;font-size:clamp(42px,7vw,82px);max-width:940px}.hero p{font-size:20px;max-width:760px;color:rgba(255,255,255,.88)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--red);color:#fff!important;border:0;border-radius:999px;padding:13px 20px;font-weight:900;cursor:pointer}.btn.secondary{background:#fff;color:var(--blue)!important;border:1px solid #d0d8e8}.btn.dark{background:var(--blue);color:#fff!important}
.section{padding:86px 0}.alt{background:var(--light)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}.intro{font-size:18px;color:var(--muted);max-width:780px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.grid.four{grid-template-columns:repeat(4,1fr)}.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid #e5eaf3;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.card-body{padding:28px}.card h3{font-size:26px}.card-img{height:245px;background:var(--img) center/cover no-repeat}.badge{display:inline-block;background:#eef4ff;color:var(--blue);font-weight:900;padding:7px 12px;border-radius:999px;font-size:12px;margin-bottom:12px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.visual{min-height:470px;border-radius:32px;background:var(--img) center/cover no-repeat;box-shadow:var(--shadow)}.band{background:var(--blue);color:#fff}.band h2,.band h3{color:#fff}.band p,.band li{color:rgba(255,255,255,.78)}.service{padding:32px;border-radius:24px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15)}
.list{display:grid;gap:14px;margin:24px 0}.list div{background:#fff;border:1px solid #e5eaf3;border-radius:18px;padding:18px}.list strong{color:var(--blue)}.contact-box{background:#fff;border-left:6px solid var(--red);border-radius:20px;padding:28px;box-shadow:var(--shadow)}
.footer{background:#081d36;color:#fff;padding:55px 0 24px}.footer p,.footer a{color:rgba(255,255,255,.72)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
input,textarea,select{width:100%;padding:14px 16px;border:1px solid #d7dfec;border-radius:14px;font:inherit;margin:6px 0 14px}textarea{min-height:130px}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:12px;border-bottom:1px solid #e5eaf3;text-align:left;vertical-align:top}.ok{background:#ecfdf5;border-left:5px solid #16a34a;padding:16px;border-radius:12px;margin:14px 0}.bad{background:#fff1f2;border-left:5px solid var(--red);padding:16px;border-radius:12px;margin:14px 0}
.answer{display:flex!important;align-items:flex-start;gap:12px;margin:10px 0;padding:12px 14px;border:1px solid #e5e7eb;border-radius:12px;background:#fff;font-weight:600;line-height:1.45}.answer input[type=radio]{width:auto!important;min-width:18px;margin:4px 0 0 0;flex:0 0 auto}.cart-item{border:1px solid #e5eaf3;border-radius:16px;padding:16px;margin:12px 0}.cart-line{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center}.cart-line input{width:auto!important}.cart-price{font-weight:900;color:var(--red)}
.course-img{width:100%;max-height:380px;object-fit:cover;border-radius:18px;margin:24px 0;box-shadow:0 10px 30px rgba(15,23,42,.12)}.video-box{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:18px;margin:24px 0;background:#111}.video-box iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}.highlight{background:#f8fafc;border-left:5px solid var(--red);padding:18px 20px;border-radius:12px;margin:22px 0}.lesson-nav{display:flex;justify-content:space-between;gap:16px;margin-top:34px}
@media(max-width:900px){.nav{display:block}.brand img{height:50px}nav{margin-top:12px}.grid,.grid.four,.grid.two,.split,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.hero{min-height:590px}.section{padding:60px 0}}

.lesson-theory{margin-top:28px}.lesson-theory h2,.lesson-video h2{font-size:1.35rem;margin:26px 0 10px}.lesson-theory p,.lesson-video p{line-height:1.75}.lesson-video{margin:26px 0;padding:20px;background:#f8fafc;border:1px solid #e6e8ee;border-radius:16px}.lesson-video-frame{aspect-ratio:16/9;width:100%;background:#111827;overflow:hidden;border-radius:10px}.lesson-video-frame iframe,.lesson-video-frame video{width:100%;height:100%;display:block;border:0}.lesson-source{font-size:.9rem}details{padding:12px 0}summary{cursor:pointer;font-weight:700}details[open] summary{margin-bottom:12px}