:root{
  --blue:#0d5fd1;
  --deep:#0b2a4a;
  --light:#f5f9fd;
  --card:#ffffff;
  --text:#17324d;
  --muted:#58708b;
  --shadow:0 14px 34px rgba(20,66,120,.10);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(180deg,#eef5fb 0%,#f8fbfe 100%);color:var(--text)}
a{text-decoration:none;color:inherit}
.wrap{width:min(1240px,calc(100% - 32px));margin:0 auto}
.topbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid #dbe6f2}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
.brand-left{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,#1f88ff,#0047b4);color:#fff;display:grid;place-items:center;font-size:26px;box-shadow:var(--shadow)}
.brand-title{font-size:20px;font-weight:800;letter-spacing:.4px;color:var(--deep)}
.brand-sub{font-size:12px;color:var(--muted)}
.main-nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.main-nav a{padding:10px 16px;border-radius:999px;color:#34506f;font-weight:700}
.main-nav a.active,.main-nav a:hover{background:#e9f2ff;color:var(--blue)}
.offline-badge{padding:10px 16px;border-radius:999px;background:linear-gradient(135deg,#eaf6ff,#f6fbff);color:var(--deep);font-weight:700;border:1px solid #d8e8fb;white-space:nowrap}
.hero{position:relative;overflow:hidden;padding:36px 0 16px;background:
 radial-gradient(circle at 10% 20%, rgba(42,135,255,.18), transparent 18%),
 radial-gradient(circle at 90% 15%, rgba(42,135,255,.18), transparent 18%),
 linear-gradient(180deg,#f9fcff 0%,#e8f3ff 100%)}
.hero::before,.hero::after{content:"";position:absolute;top:50px;width:220px;height:220px;background:linear-gradient(135deg,#1e86ff,#ffb027);opacity:.95;clip-path:polygon(0 20%,55% 0,100% 0,35% 55%,0 100%);border-radius:28px}
.hero::before{left:-70px;transform:rotate(5deg)}
.hero::after{right:-70px;transform:rotate(180deg)}
.hero-inner{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:center}
.eyebrow{margin:0 0 6px;color:var(--deep);font-weight:800;font-size:24px;letter-spacing:.3px}
.hero h1{margin:0;color:#fff;background:linear-gradient(135deg,#0e63d7,#0a4aa5);display:inline-block;padding:16px 26px;border-radius:18px;font-size:clamp(28px,4vw,58px);line-height:1.05;box-shadow:var(--shadow)}
.hero h2{margin:14px 0 10px;display:inline-block;background:#dff0ff;color:var(--deep);padding:10px 20px;border-radius:16px;font-size:clamp(24px,3vw,48px)}
.hero-meta{font-size:clamp(18px,2vw,34px);color:#214e7c;margin:6px 0 18px}
.hero-cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{padding:14px 18px;border-radius:14px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--shadow)}
.btn-primary{background:linear-gradient(135deg,#1987ff,#0e5fd4);color:#fff}
.btn-ghost{background:#fff;color:var(--deep);border:1px solid #dbe6f2}
.hero-aside{position:relative;min-height:330px}
.quote-box{position:absolute;font-size:20px;line-height:1.3;color:#214e7c;max-width:180px}
.quote-box.left{left:0;top:32px;transform:rotate(-6deg)}
.quote-box.right{right:0;top:54px;max-width:170px;text-align:right;transform:rotate(-7deg)}
.school-card{position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:min(560px,100%);height:290px}
.school{position:absolute;left:50%;bottom:42px;transform:translateX(-50%);width:66%;height:150px;background:linear-gradient(180deg,#fefefe,#dae7f6);border-radius:10px 10px 0 0;box-shadow:var(--shadow);border:8px solid #eef6ff}
.school::before{content:"";position:absolute;left:50%;top:-34px;transform:translateX(-50%);width:72%;height:42px;background:linear-gradient(135deg,#2475df,#0b5abf);clip-path:polygon(0 100%,50% 0,100% 100%);border-radius:4px}
.school::after{content:"";position:absolute;inset:18px;background:repeating-linear-gradient(90deg,#c7dbef 0 14px,transparent 14px 48px),repeating-linear-gradient(0deg,#c7dbef 0 12px,transparent 12px 46px)}
.flag{position:absolute;left:50%;bottom:194px;width:4px;height:84px;background:#667d95;transform:translateX(-50%)}
.flag::after{content:"";position:absolute;left:4px;top:8px;width:34px;height:22px;background:linear-gradient(180deg,#e33 0 50%,#fff 50% 100%)}
.school-pill{position:absolute;left:50%;bottom:0;transform:translateX(-50%);background:#0e4f9b;color:#fff;padding:12px 28px;border-radius:999px;font-weight:800;font-size:clamp(14px,1.8vw,24px);text-align:center;box-shadow:var(--shadow);white-space:nowrap}
.search-strip{padding:8px 0 0}
.search-strip-inner{display:grid;grid-template-columns:1.55fr .7fr;gap:18px;align-items:center}
.search-box{background:#fff;border:1px solid #dce9f5;border-radius:24px;padding:10px 10px 10px 16px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow)}
.search-box input{flex:1;border:none;outline:none;font-size:17px;background:transparent;color:var(--text)}
.search-box button{border:none;background:linear-gradient(135deg,#1987ff,#0e5fd4);color:#fff;padding:13px 28px;border-radius:18px;font-weight:700;cursor:pointer}
.study-box{background:linear-gradient(135deg,#f6fbff,#ecf7ff);border:1px solid #d7e9f8;border-radius:20px;padding:14px 18px;display:flex;flex-direction:column;gap:4px;font-weight:800;color:var(--deep);box-shadow:var(--shadow)}
.study-box span{font-size:14px;font-weight:500;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:20px 0}
.stat-card{background:#fff;border-radius:20px;padding:18px;box-shadow:var(--shadow);border:1px solid #e3edf7;text-align:center}
.stat-card strong{display:block;color:var(--blue);font-size:28px;margin-bottom:4px}
.stat-card span{color:var(--muted);font-size:14px}
.filters{padding:8px 0 20px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
.section-head.single{justify-content:flex-start}
.section-tag{margin:0 0 6px;color:#3e7ece;font-size:13px;font-weight:800;letter-spacing:.12em}
.section-head h3{margin:0;font-size:34px;color:var(--deep)}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{border:none;background:#eaf3ff;color:#335b87;padding:10px 14px;border-radius:999px;font-weight:700;cursor:pointer}
.chip.active,.chip:hover{background:linear-gradient(135deg,#1987ff,#0e5fd4);color:#fff}
.cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.subject-card{background:#fff;border:1px solid #dbe8f4;border-radius:24px;overflow:hidden;box-shadow:var(--shadow);transition:transform .2s ease, box-shadow .2s ease;display:flex;flex-direction:column}
.subject-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(20,66,120,.18)}
.card-image{aspect-ratio:4/3;background:#eef4fa center/cover no-repeat}
.card-body{padding:16px 16px 18px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-badge{display:inline-flex;align-items:center;gap:8px;background:#eef6ff;color:#205eaf;padding:7px 11px;border-radius:999px;font-size:12px;font-weight:800;width:max-content}
.card-title{font-size:23px;line-height:1.15;font-weight:800;color:var(--deep);margin:0}
.card-desc{font-size:14px;line-height:1.5;color:var(--muted);min-height:42px}
.card-actions{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto}
.card-link{padding:12px 14px;border-radius:14px;background:linear-gradient(135deg,#1987ff,#0e5fd4);color:#fff;font-weight:800;text-align:center;flex:1}
.card-tag{font-size:12px;color:#4f6881;background:#f3f8fd;border:1px solid #dfebf7;padding:10px 11px;border-radius:14px;white-space:nowrap}
.empty-state{text-align:center;padding:28px;color:var(--muted)}
.features{display:grid;grid-template-columns:1fr 1.15fr;gap:18px;padding:6px 0 24px}
.feature-panel{background:#fff;border:1px solid #e1ebf5;border-radius:26px;box-shadow:var(--shadow);padding:22px}
.quote-panel{display:grid;grid-template-columns:160px 1fr;gap:22px;align-items:center}
.books-stack{display:flex;flex-direction:column;gap:8px}
.book{padding:14px 14px;border-radius:12px;color:#fff;font-weight:800;box-shadow:var(--shadow)}
.book.blue{background:linear-gradient(135deg,#0d5fd1,#123e80)}
.book.orange{background:linear-gradient(135deg,#f6a21e,#d56f0f)}
.big-quote{font-size:34px;font-weight:800;color:var(--deep);line-height:1.1}
.quote-panel p{margin:8px 0 0;color:var(--muted);grid-column:2}
.icon-features{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.mini-feature{display:flex;flex-direction:column;align-items:center;text-align:center;padding:18px 10px;border-right:1px solid #e7eff7}
.mini-feature:last-child{border-right:none}
.mini-feature span{font-size:34px;margin-bottom:12px}
.mini-feature strong{font-size:16px;color:var(--deep)}
.mini-feature small{font-size:12px;color:var(--muted);margin-top:6px}
.guide{padding:8px 0 30px}
.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.guide-step{background:#fff;border:1px solid #e1ebf5;border-radius:20px;padding:18px;box-shadow:var(--shadow);display:flex;gap:14px;align-items:flex-start}
.guide-step b{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#1987ff,#0e5fd4);color:#fff;display:grid;place-items:center;flex:none}
.guide-step span{color:var(--muted);line-height:1.55}
.footer{background:linear-gradient(135deg,#0b56b6,#093b81);color:#fff;margin-top:10px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;flex-wrap:wrap}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}

@media (max-width: 1100px){
  .hero-inner,.features,.search-strip-inner{grid-template-columns:1fr}
  .hero-aside{min-height:360px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .guide-grid{grid-template-columns:repeat(2,1fr)}
  .icon-features{grid-template-columns:repeat(3,1fr)}
}
@media (max-width: 780px){
  .topbar-inner{flex-wrap:wrap}
  .main-nav{order:3;width:100%;justify-content:flex-start;overflow:auto;padding-bottom:4px}
  .hero h1{font-size:34px}
  .hero h2{font-size:28px}
  .hero-meta{font-size:18px}
  .section-head{flex-direction:column;align-items:flex-start}
  .stats{grid-template-columns:1fr 1fr}
  .quote-panel{grid-template-columns:1fr}
  .quote-panel p{grid-column:1}
  .icon-features{grid-template-columns:repeat(2,1fr)}
  .mini-feature{border-right:none;border-bottom:1px solid #e7eff7}
  .guide-grid{grid-template-columns:1fr}
}
@media (max-width: 520px){
  .wrap{width:min(100% - 20px,1240px)}
  .school-pill{white-space:normal;width:90%}
  .stats{grid-template-columns:1fr}
  .cards-grid{grid-template-columns:1fr}
  .icon-features{grid-template-columns:1fr}
}