:root{color-scheme:only light;--ink:#15384c;--muted:#6b8190;--teal:#007f7d;--bg:#f2f7f8}*{box-sizing:border-box}body{margin:0;font:16px/1.65 'Microsoft YaHei',system-ui,sans-serif;color:var(--ink);background:var(--bg)}button,input,select,textarea{font:inherit}button,a{cursor:pointer}button{border:0;border-radius:12px;padding:12px 20px;background:var(--teal);color:white;font-weight:600}button.soft{background:#e7f1f2;color:var(--ink)}button.small{padding:7px 12px;font-size:13px}input,select,textarea{width:100%;border:1px solid #ccdae0;border-radius:10px;padding:12px;background:white;color:var(--ink)}textarea{min-height:110px}label{display:block;margin:14px 0 7px;font-size:14px}h1,h2,h3,p{margin-top:0}h1{font-size:40px;line-height:1.3}h2{font-size:27px}h3{font-size:19px}p{color:var(--muted)}a{color:var(--teal)}.login{min-height:100vh;display:grid;grid-template-columns:1.2fr 1fr}.intro{background:linear-gradient(135deg,#102f44,#047f7a);color:white;padding:9vw 7vw;position:relative;overflow:hidden}.intro:after{content:'';position:absolute;width:470px;height:470px;border:70px solid #ffffff0c;border-radius:50%;right:-160px;bottom:-120px}.intro p{color:#b9d6dd}.eyebrow{font-size:12px;font-weight:bold;letter-spacing:3px;margin-bottom:24px}.loginform{align-self:center;padding:60px;max-width:560px;width:100%;margin:auto}.note{background:#edf6f5;border-radius:12px;padding:16px;font-size:13px;color:#49736f}.loginform button{width:100%;margin:24px 0}.layout{display:grid;grid-template-columns:235px 1fr;min-height:100vh}.sidebar{background:#123448;color:#fff;padding:30px 20px;position:sticky;top:0;height:100vh}.brand{font-size:20px;font-weight:800;line-height:1.5;margin-bottom:35px}.brand small{font-size:11px;color:#9eb7c6;font-weight:400}.nav{display:block;width:100%;text-align:left;background:transparent;color:#cfdee6;margin:7px 0;padding:12px}.nav.active{background:#ffffff18;color:#fff}.profile{position:absolute;bottom:25px;left:20px;right:20px;border-top:1px solid #ffffff20;padding-top:20px;font-size:13px}.profile button{margin-top:10px}.main{padding:36px 4vw}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}.pill{background:#e3f3ed;color:#227967;padding:5px 12px;border-radius:20px;font-size:12px}.hero{background:linear-gradient(115deg,#12374e,#0c8980);border-radius:25px;padding:40px;color:white;margin-bottom:25px}.hero p{color:#d2e7e9;max-width:800px}.hero button{background:#ffbe47;color:#173648}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{background:#fff;border:1px solid #dfebef;border-radius:20px;padding:24px;box-shadow:0 7px 20px #13364a05}.card .icon{font-size:27px;margin-bottom:15px}.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.tags span{display:inline-block;font-size:12px;background:#f0f5f7;padding:3px 9px;border-radius:9px;margin:3px}.tools{display:flex;gap:12px;margin:22px 0}.tools input{flex:2}.tools select{flex:1}.stat{font-size:32px;font-weight:800;color:var(--teal)}.empty{padding:50px;text-align:center;background:#fff;border-radius:15px}.tablewrap{overflow:auto;background:white;border-radius:18px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{padding:16px;text-align:left;border-bottom:1px solid #edf2f4}th{background:#e8f3f3}.muted{color:var(--muted);font-size:13px}.section{margin-top:30px}dialog{border:0;border-radius:22px;width:min(680px,94vw);max-height:90vh;overflow:auto;padding:30px;color:var(--ink)}dialog::backdrop{background:#102b3d70;backdrop-filter:blur(4px)}.check{display:flex;gap:20px;flex-wrap:wrap}.check label{display:flex;gap:6px;align-items:center}.check input{width:auto}.close{float:right;background:#edf3f5;color:var(--ink);padding:5px 13px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#12374e;color:white;padding:12px 24px;border-radius:12px;display:none;z-index:9999}.frame{width:100%;height:78vh;border:1px solid #d7e3e8;border-radius:16px;background:white}.progress{margin:12px 0;color:var(--teal)}video{width:100%;max-height:60vh;background:black}iframe.preview{width:100%;height:65vh;border:0}.titleline{display:flex;justify-content:space-between;gap:15px;align-items:center}.filehint{background:#fff5df;padding:15px;border-radius:12px;font-size:13px}.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:950px){.grid{grid-template-columns:1fr 1fr}.layout{grid-template-columns:190px 1fr}.sidebar{padding:20px 10px}.login{grid-template-columns:1fr}.intro{padding:45px}.loginform{padding:35px}}@media(max-width:650px){.layout{display:block}.sidebar{position:relative;height:auto}.profile{position:static}.brand{margin-bottom:12px}.nav{display:inline-block;width:auto}.grid,.two{grid-template-columns:1fr}.main{padding:20px}.tools{flex-wrap:wrap}h1{font-size:29px}}
.intro .tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.intro .tags span {
  margin: 0;
  padding: 7px 14px;
  color: #ffffff;
  background: #ffffff14;
  border: 1px solid #ffffff45;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
}
.intro::after { pointer-events: none; }
.portal{background:#f8f8f4;color:#113e5b;overflow:hidden}.portal-head{max-width:1360px;margin:auto;padding:28px 5%;display:flex;justify-content:space-between;align-items:center;gap:24px}.logo-lockup{display:flex;gap:18px;align-items:center;text-decoration:none;color:#153b58;font-size:17px;font-weight:800}.logo-lockup img{width:112px;height:54px;object-fit:contain}.logo-lockup small{display:block;font-size:9px;letter-spacing:1px;margin-top:4px}.portal nav{display:flex;align-items:center;gap:28px}.portal nav a{font-size:14px;text-decoration:none;color:#426078}.outline{background:transparent;color:#153b58;border:1px solid #b8cbd2;border-radius:30px;font-size:13px}.portal-hero{max-width:1360px;margin:auto;padding:65px 5% 90px;display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:35px;min-height:640px}.hero-copy .eyebrow{color:#0b827e;font-size:10px;letter-spacing:2.6px}.orange-line{width:42px;height:5px;background:#ed5b08;margin:28px 0}.hero-copy h1{font-size:clamp(36px,4.2vw,66px);letter-spacing:-2px;line-height:1.3;font-weight:850;margin-bottom:20px}.hero-copy h1 span{color:#ed5b08}.hero-copy>p{font-size:23px;color:#1d536d;letter-spacing:4px}.hero-description{font-size:15px;line-height:1.9;color:#65808d;margin-bottom:26px}.hero-copy .actions{align-items:center;gap:20px}.hero-copy button{border-radius:30px;background:#143e59;font-size:14px;padding:15px 24px}.opening{font-size:11px;color:#7d8e96}.knowledge-orbit{position:relative;min-height:450px;background:radial-gradient(ellipse,#c7e7e055,transparent 68%)}.orbit{position:absolute;border:1px solid #1a7e7b30;border-radius:50%;width:400px;height:400px;left:50%;top:50%;transform:translate(-50%,-50%)}.orbit-two{width:320px;height:320px;border-style:dashed}.orbit-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:255px;height:255px;border-radius:50%;background:linear-gradient(140deg,#163b5a,#008a82);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 25px 60px #144f6a25}.orbit-core small{font-size:8px;letter-spacing:2px;color:#b1d7d9}.orbit-core strong{font-size:36px;line-height:1.5;letter-spacing:4px;margin:16px 0}.orbit-core>span{font-size:8px;letter-spacing:2px;color:#b1d7d9}.orbit-tag{position:absolute;background:white;box-shadow:0 12px 30px #11394d12;border:1px solid #dce7e7;padding:14px 20px;border-radius:16px;font-weight:600;font-size:13px}.tag-a{top:25px;left:10%}.tag-b{top:180px;right:-10px;color:#bc6908;background:#fff4da}.tag-c{bottom:10px;left:12%}.spark{position:absolute;right:10%;top:32px;font-size:45px;color:#ee650f}.ecosystem{max-width:1360px;padding:25px 5% 80px;margin:auto}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}.section-heading .eyebrow{color:#0c827e;letter-spacing:2px;font-size:10px;margin-bottom:12px}.section-heading h2{font-size:30px;margin-bottom:0}.section-heading p{font-size:13px;margin:0}.product-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.product-tile{position:relative;padding:28px;border-radius:24px;overflow:hidden;min-height:330px;display:flex;flex-direction:column}.product-tile:after{content:'';width:240px;height:240px;border:35px solid #ffffff0a;border-radius:50%;position:absolute;right:-100px;top:-40px;pointer-events:none}.ielts{background:#153d59;color:#fff}.think{background:#f8bc49;color:#173d58}.academy{background:#087f7b;color:#fff}.tile-top{display:flex;justify-content:space-between;letter-spacing:1px;font-size:10px;opacity:.75}.tile-symbol{font-size:45px;margin:23px 0 15px}.product-tile h3{font-size:23px;margin-bottom:10px}.product-tile p{color:inherit;opacity:.75;font-size:13px;max-width:280px}.tile-link{margin-top:auto;background:transparent;padding:15px 0 0;text-align:left;border-top:1px solid #ffffff30;border-radius:0;color:inherit;font-size:12px}.tile-link span{float:right;font-size:18px}.learning-band{padding:60px max(5%,calc((100vw - 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