:root{--ep-ink:#101c3d;--ep-blue:#3465b6;--ep-violet:#7869d5;--ep-gold:#c58b47;--ep-mist:#f4f5f9;--ep-line:rgba(25,49,91,.14)}
*{box-sizing:border-box}.edu-premium-page{margin:0;color:var(--ep-ink);background:#f7f8fb;font-family:Inter,"Noto Sans SC","PingFang SC",system-ui,sans-serif}.edu-premium-page main{overflow:hidden}.edu-premium-page .topic-header{position:absolute;z-index:20;top:0;left:0;right:0;background:transparent;border:0}.edu-premium-page .topic-header nav a{color:#233d6a}.ep-kicker{margin:0;color:#9a662e;font-size:.7rem;font-weight:900;letter-spacing:.18em}.ep-hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.9fr);min-height:760px;padding:170px max(7vw,44px) 90px;overflow:hidden;background:radial-gradient(circle at 76% 22%,rgba(145,189,255,.5),transparent 28%),radial-gradient(circle at 12% 90%,rgba(255,205,167,.58),transparent 32%),linear-gradient(130deg,#fbf7ef 0%,#eef4ff 52%,#dddff8 100%)}.ep-hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(30,55,102,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(30,55,102,.045) 1px,transparent 1px);background-size:56px 56px;mask-image:linear-gradient(90deg,#000,transparent 82%)}.ep-hero-copy{position:relative;z-index:2;max-width:810px}.ep-hero h1{max-width:760px;margin:22px 0 30px;font-size:clamp(3.3rem,6.4vw,7.2rem);font-weight:760;line-height:.92;letter-spacing:-.075em}.ep-hero h1 em{color:#496cb7;font-style:normal}.ep-hero-copy>p:not(.ep-kicker){max-width:680px;color:#455a7b;font-size:1.05rem;line-height:1.9}.ep-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.ep-hero-actions a,.ep-cta a{display:inline-flex;align-items:center;justify-content:center;padding:14px 21px;border:1px solid rgba(28,61,111,.25);border-radius:999px;color:#18355f;background:rgba(255,255,255,.6);font-weight:850;text-decoration:none;backdrop-filter:blur(12px)}.ep-hero-actions a:first-child,.ep-cta a{color:#fff;background:#173c70;border-color:#173c70}.ep-orbit{position:relative;align-self:center;justify-self:center;width:min(39vw,510px);aspect-ratio:1}.ep-orbit:before{content:"";position:absolute;inset:7%;border-radius:50%;background:radial-gradient(circle at 36% 30%,rgba(255,255,255,.96),rgba(122,177,235,.3) 34%,rgba(89,104,183,.16) 68%,rgba(255,255,255,.22));box-shadow:inset -30px -24px 70px rgba(49,72,139,.17),0 40px 90px rgba(41,68,131,.22);animation:ep-float 7s ease-in-out infinite}.ep-orbit-ring{position:absolute;inset:0;border:1px solid rgba(34,73,131,.3);border-radius:50%;animation:ep-spin 22s linear infinite}.ep-orbit-ring:before{content:"";position:absolute;top:14%;left:11%;width:8px;height:8px;border-radius:50%;background:#c7924d;box-shadow:0 0 18px rgba(199,146,77,.8)}.ep-orbit-ring.r2{inset:18%;transform:rotate(62deg) scaleX(.55);border-color:rgba(69,102,177,.24);animation-duration:17s;animation-direction:reverse}.ep-orbit-core{position:absolute;inset:34%;display:grid;place-content:center;text-align:center;border:1px solid rgba(255,255,255,.85);border-radius:50%;background:rgba(255,255,255,.57);box-shadow:0 15px 45px rgba(37,67,129,.2);backdrop-filter:blur(16px)}.ep-orbit-core b{font-size:3.2rem;line-height:1}.ep-orbit-core small{margin-top:5px;color:#5d6e90;font-weight:850;letter-spacing:.15em}.ep-orbit i{position:absolute;padding:8px 12px;border:1px solid rgba(255,255,255,.82);border-radius:999px;color:#385783;background:rgba(255,255,255,.68);font-size:.7rem;font-style:normal;font-weight:800;box-shadow:0 8px 24px rgba(47,70,123,.1);backdrop-filter:blur(12px)}.ep-orbit .n1{left:-2%;top:27%}.ep-orbit .n2{right:-4%;top:23%}.ep-orbit .n3{left:7%;bottom:12%}.ep-orbit .n4{right:4%;bottom:15%}@keyframes ep-spin{to{transform:rotate(360deg)}}@keyframes ep-float{50%{transform:translateY(-10px) scale(1.018)}}
.ep-intro,.ep-section{max-width:1280px;margin:auto;padding:100px 42px}.ep-intro{display:grid;grid-template-columns:.58fr 1.42fr;gap:70px;align-items:start}.ep-intro h2,.ep-section h2,.ep-cta h2{margin:0;font-size:clamp(2.3rem,4.7vw,5rem);line-height:1.02;letter-spacing:-.06em}.ep-intro p:not(.ep-kicker){margin:25px 0 0;color:#53647d;font-size:1.02rem;line-height:1.95}.ep-intro strong{color:#1c427d}.ep-section{padding-top:82px;padding-bottom:82px}.ep-section-head{display:grid;grid-template-columns:1.35fr .65fr;gap:50px;align-items:end}.ep-section-head h2{margin-top:15px}.ep-section-head>p{margin:0;color:#607087;line-height:1.8}.ep-institutions{max-width:none;padding-left:max(42px,7vw);padding-right:max(42px,7vw);background:#101d3b;color:#fff}.ep-institutions .ep-kicker{color:#e7b36d}.ep-institutions .ep-section-head>p{color:rgba(255,255,255,.67)}.ep-filters{display:flex;flex-wrap:wrap;gap:9px;margin:38px 0 27px}.ep-filters button{padding:10px 14px;border:1px solid rgba(255,255,255,.18);border-radius:999px;color:rgba(255,255,255,.72);background:rgba(255,255,255,.055);font:inherit;font-size:.75rem;font-weight:800;cursor:pointer}.ep-filters button.is-active{color:#122344;background:#fff}.ep-school-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.ep-school{position:relative;min-height:390px;padding:30px 27px;border:1px solid rgba(255,255,255,.13);border-radius:22px;background:linear-gradient(145deg,rgba(255,255,255,.105),rgba(255,255,255,.04));box-shadow:0 16px 40px rgba(3,10,26,.16);transition:transform .3s,border-color .3s,opacity .25s}.ep-school:hover{transform:translateY(-7px);border-color:rgba(220,175,111,.5)}.ep-school[hidden]{display:none}.ep-school-code{color:#e9b873;font-size:.68rem;font-weight:900;letter-spacing:.17em}.ep-school h3{margin:20px 0 6px;font-size:1.45rem}.ep-school-mode{min-height:37px;color:#9db7df!important;font-size:.76rem!important;font-weight:760}.ep-school p{color:rgba(255,255,255,.74);line-height:1.72}.ep-school ul{display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:20px 0 27px;list-style:none}.ep-school li{padding:6px 9px;border-radius:999px;color:#bed0eb;background:rgba(124,164,220,.1);font-size:.66rem}.ep-school a{position:absolute;left:27px;bottom:27px;color:#fff;font-size:.76rem;font-weight:850;text-decoration:none}.ep-school-featured{background:radial-gradient(circle at 100% 0,rgba(128,150,255,.4),transparent 43%),linear-gradient(145deg,rgba(80,108,191,.5),rgba(255,255,255,.06))}.ep-matrix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:38px;background:var(--ep-line)}.ep-matrix-grid article{min-height:250px;padding:31px 27px;background:#fff}.ep-matrix-grid b{color:#b77b38;font-size:.72rem;letter-spacing:.15em}.ep-matrix-grid h3{margin:35px 0 12px;font-size:1.35rem}.ep-matrix-grid p{margin:0;color:#5b6c83;line-height:1.75}.ep-verify{display:grid;grid-template-columns:1fr 1fr;gap:75px;max-width:none;padding-left:max(42px,7vw);padding-right:max(42px,7vw);background:linear-gradient(125deg,#dfeaf8,#f6eadb)}.ep-verify h2{margin:16px 0 22px}.ep-verify p:not(.ep-kicker){color:#4c607e;line-height:1.9}.ep-source-link{display:inline-block;margin-top:15px;color:#1c477f;font-weight:850;text-underline-offset:4px}.ep-verify ol{display:grid;gap:9px;margin:0;padding:0;list-style:none}.ep-verify li{display:flex;align-items:center;gap:15px;padding:14px 17px;border:1px solid rgba(35,69,119,.13);border-radius:13px;background:rgba(255,255,255,.55);font-weight:760;backdrop-filter:blur(10px)}.ep-verify li span{color:#ab6f30;font-size:.7rem;letter-spacing:.1em}.ep-faq>h2{margin:14px 0 35px}.ep-faq>div{display:grid;grid-template-columns:1fr 1fr;gap:12px}.ep-faq details{padding:22px;border:1px solid var(--ep-line);border-radius:15px;background:#fff}.ep-faq summary{font-weight:850;cursor:pointer}.ep-faq details p{color:#586a82;line-height:1.75}.ep-cta{padding:110px max(7vw,42px);color:#fff;background:radial-gradient(circle at 85% 30%,rgba(129,157,231,.5),transparent 26%),linear-gradient(125deg,#0e2348,#254d80)}.ep-cta .ep-kicker{color:#e6b777}.ep-cta h2{margin:18px 0 34px}.ep-cta a{width:max-content;background:#fff;color:#153865;border-color:#fff}.edu-premium-page .topic-footer{background:#0d1c37;color:rgba(255,255,255,.63)}
/* OTHM profile */.ep-hero-othm{background:radial-gradient(circle at 77% 20%,rgba(255,197,85,.5),transparent 25%),radial-gradient(circle at 15% 90%,rgba(86,132,245,.4),transparent 34%),linear-gradient(130deg,#f8fafc,#eaf0ff 55%,#d8e1f8)}.ep-credential{position:relative;align-self:center;justify-self:center;width:min(39vw,500px);padding:36px;border:1px solid rgba(255,255,255,.78);border-radius:34px;background:rgba(255,255,255,.46);box-shadow:0 35px 90px rgba(35,65,126,.18);backdrop-filter:blur(22px);transform:rotate(2deg)}.ep-credential:before{content:"";position:absolute;inset:16px;border:1px solid rgba(50,94,164,.16);border-radius:24px}.ep-credential>*{position:relative}.ep-credential small{display:block;color:#a06e2e;font-weight:900;letter-spacing:.17em}.ep-credential strong{display:block;margin:32px 0 15px;font-size:clamp(2.7rem,5vw,4.8rem);letter-spacing:-.06em}.ep-credential p{color:#536785;line-height:1.75}.ep-modules{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px}.ep-module{min-height:170px;padding:25px;border-radius:17px;background:#fff;border:1px solid var(--ep-line)}.ep-module b{color:#b97932;font-size:.7rem}.ep-module h3{margin:24px 0 0;font-size:1.23rem}.ep-route{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.ep-route article{padding:30px;border-radius:20px;background:#fff;border:1px solid var(--ep-line)}.ep-route h3{margin:25px 0 10px}.ep-route p{color:#5a6b83;line-height:1.75}.ep-route-tag{display:inline-flex;padding:7px 10px;border-radius:999px;color:#2c5188;background:#e8eef8;font-size:.67rem;font-weight:850}.ep-caution{padding:25px 28px;border-left:4px solid #bd813c;background:#f4eadc;color:#4f6079;line-height:1.8}
@media(max-width:980px){.ep-hero{grid-template-columns:1fr;min-height:auto;padding-top:145px}.ep-orbit,.ep-credential{width:min(72vw,470px);margin:60px auto 0}.ep-section-head,.ep-verify{grid-template-columns:1fr}.ep-school-grid{grid-template-columns:repeat(2,1fr)}.ep-matrix-grid,.ep-modules,.ep-route{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.edu-premium-page .topic-header nav{display:none}.ep-hero{padding:132px 22px 58px}.ep-hero h1{font-size:2.75rem;line-height:.98}.ep-orbit{width:min(88vw,350px)}.ep-intro,.ep-section{padding:62px 22px}.ep-intro{grid-template-columns:1fr;gap:20px}.ep-section-head{gap:20px}.ep-school-grid,.ep-matrix-grid,.ep-faq>div,.ep-modules,.ep-route{grid-template-columns:1fr}.ep-school{min-height:400px}.ep-verify{padding-left:22px;padding-right:22px;gap:38px}.ep-cta{padding:75px 22px}.ep-credential{width:100%;padding:28px}.ep-credential strong{font-size:3rem}}
@media(prefers-reduced-motion:reduce){.ep-orbit:before,.ep-orbit-ring{animation:none!important}.ep-school{transition:none}}