:root{--blue:#1f64e9;--deep:#0c1d3d;--ink:#15213a;--muted:#66738c;--line:#e5ebf4;--paper:#f5f8fd;--aqua:#28c4a5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:#fff}a{color:inherit;text-decoration:none}.site-header{height:76px;padding:0 max(5vw,24px);display:flex;align-items:center;gap:36px;position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(225,232,243,.8)}.brand,.footer-brand{display:flex;align-items:center;gap:12px}.brand span,.footer-brand>span{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;color:#fff;background:linear-gradient(145deg,#2b79f5,#1853c8);font-size:23px;font-weight:800;box-shadow:0 8px 20px rgba(31,100,233,.24)}.brand strong{font-size:20px;white-space:nowrap}.site-header nav{display:flex;gap:30px;margin-left:auto}.site-header nav a{font-size:15px;color:#44516a}.site-header nav a:hover{color:var(--blue)}.header-cta,.primary{background:var(--blue);color:#fff;border-radius:12px;padding:11px 20px;font-weight:700;box-shadow:0 10px 24px rgba(31,100,233,.22)}.menu-button{display:none;border:0;background:none;font-size:24px}.hero{min-height:640px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:5vw;padding:72px max(7vw,28px) 84px;overflow:hidden;background:radial-gradient(circle at 88% 20%,#d9e8ff 0,transparent 35%),linear-gradient(145deg,#f8fbff 20%,#eef5ff 100%)}.eyebrow{font-size:13px;letter-spacing:.18em;color:var(--blue);font-weight:800;text-transform:uppercase}.hero h1{font-size:clamp(44px,5vw,72px);line-height:1.12;margin:18px 0 24px;letter-spacing:-.05em}.hero h1 em{color:var(--blue);font-style:normal}.hero-text{max-width:590px;font-size:19px;line-height:1.8;color:var(--muted)}.hero-actions{display:flex;gap:14px;margin:34px 0}.primary,.secondary{display:inline-flex;padding:14px 26px;border-radius:13px;font-weight:700}.secondary{border:1px solid #cfd9ea;background:rgba(255,255,255,.72)}.trust{display:flex;gap:22px;flex-wrap:wrap;color:#52617a;font-size:14px}.trust span::first-letter{color:var(--aqua)}.hero-visual{height:460px;position:relative}.glow{position:absolute;inset:45px;border-radius:50%;background:rgba(52,124,245,.16);filter:blur(45px)}.study-card{position:absolute;background:rgba(255,255,255,.93);border:1px solid rgba(255,255,255,.8);box-shadow:0 24px 60px rgba(24,70,140,.16);border-radius:24px}.main-card{width:min(420px,85%);padding:30px;left:8%;top:80px;transform:rotate(-2deg)}.card-top{display:flex;justify-content:space-between;color:#7b8aa5;font-size:14px}.card-top b{color:#19a98e}.main-card>strong{display:block;font-size:27px;margin:42px 0 24px}.progress{height:10px;background:#e9eef7;border-radius:9px;overflow:hidden}.progress i{display:block;width:68%;height:100%;background:linear-gradient(90deg,var(--blue),#64a3ff);border-radius:9px}.main-card small{display:block;margin-top:12px;color:#7b8aa5}.score-card{right:0;top:8px;padding:24px;width:190px}.score-card span,.memory-card span{font-size:13px;color:#7b8aa5}.score-card strong{display:block;font-size:50px;color:var(--blue);margin-top:8px}.score-card strong small{font-size:18px}.score-card p{margin:0;font-size:13px;color:#22a38b}.memory-card{right:2%;bottom:28px;padding:22px;width:210px}.memory-card b{display:block;margin:12px 0 0}.memory-card strong{font-size:40px;color:#f29b38}.stats{display:grid;grid-template-columns:repeat(4,1fr);max-width:1180px;margin:-38px auto 0;position:relative;background:#fff;border-radius:20px;box-shadow:0 20px 60px rgba(29,58,105,.1);padding:28px}.stats div{text-align:center;border-right:1px solid var(--line)}.stats div:last-child{border:0}.stats strong{font-size:28px;color:var(--blue);display:block}.stats span{color:var(--muted);font-size:13px}.section,.feature-section{padding:105px max(7vw,28px)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:40px;max-width:1220px;margin:0 auto 46px}.section-heading h2{font-size:38px;margin:10px 0 0;letter-spacing:-.03em}.section-heading>p{max-width:480px;line-height:1.8;color:var(--muted)}.exam-grid,.news-grid{max-width:1220px;margin:auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.exam-card{padding:28px;border:1px solid var(--line);border-radius:20px;transition:.25s;background:#fff}.exam-card:hover{transform:translateY(-5px);box-shadow:0 20px 40px rgba(26,60,112,.1);border-color:#c8d9f5}.exam-card .tag{font-size:12px;color:var(--blue);background:#edf4ff;border-radius:20px;padding:6px 10px}.exam-card h3{font-size:24px;margin:24px 0 10px}.exam-card p{color:var(--muted);min-height:48px}.exam-card ul{padding:0;list-style:none;display:grid;gap:9px;margin:24px 0}.exam-card li{font-size:14px;color:#4e5b72}.exam-card li::before{content:"✓";color:var(--aqua);margin-right:8px}.exam-card a{font-weight:700;color:var(--blue)}.feature-section{background:var(--deep);color:white}.section-heading.light>p{color:#9eabc0}.section-heading.light .eyebrow{color:#74a8ff}.feature-grid{max-width:1220px;margin:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.feature-grid article{position:relative;padding:28px 24px;background:#14294e;border:1px solid #263b60;border-radius:20px;overflow:hidden}.feature-grid article>span{position:absolute;right:18px;top:12px;font-size:42px;font-weight:800;color:rgba(255,255,255,.05)}.feature-icon{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(145deg,#347cf2,#205ad4);font-weight:800}.feature-grid h3{margin:24px 0 12px}.feature-grid p{color:#aebbd0;line-height:1.7;font-size:14px}.news-section{background:var(--paper)}.news-card{display:block;background:#fff;border-radius:18px;overflow:hidden;border:1px solid var(--line)}.news-cover{height:160px;background:linear-gradient(135deg,#dceaff,#f0f6ff);display:grid;place-items:center;color:#79a1dc;font-size:48px}.news-body{padding:22px}.news-body .meta{font-size:12px;color:var(--blue)}.news-body h3{font-size:18px;line-height:1.55;margin:10px 0}.news-body p{color:var(--muted);font-size:14px;line-height:1.65}.loading,.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:50px}.download{margin:90px max(7vw,28px);padding:58px 7%;border-radius:28px;background:linear-gradient(120deg,#1557d0,#2b78f3);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:40px}.download h2{font-size:38px;margin:10px 0 18px}.download>div>p:not(.eyebrow){color:#d8e7ff}.download .eyebrow{color:#bcd6ff}.mini-points{display:flex;gap:12px;margin-top:28px}.mini-points span{padding:8px 13px;border-radius:18px;background:rgba(255,255,255,.12);font-size:13px}.qr-wrap{min-width:190px;text-align:center;background:#fff;padding:16px;border-radius:18px;color:var(--ink)}.qr-wrap img{width:158px;height:158px;object-fit:cover;display:block;margin:auto}.qr-placeholder{display:none;width:158px;height:158px;background:#f2f5fa;place-items:center;color:#8190a7}.qr-missing img{display:none}.qr-missing .qr-placeholder{display:grid}.qr-wrap b{font-size:13px;display:block;margin-top:10px}footer{background:#091831;color:white;padding:55px max(7vw,28px);display:grid;grid-template-columns:2fr 1fr 1fr;gap:45px;position:relative}.footer-brand p{color:#8695ad;font-size:13px}.footer-brand strong{font-size:20px}footer>div:not(.footer-brand){display:flex;flex-direction:column;gap:10px}footer a{color:#95a3b8;font-size:14px}.copyright{position:absolute;right:max(7vw,28px);bottom:18px;color:#66758e;font-size:12px}@media(max-width:850px){.site-header{height:66px}.site-header nav,.header-cta{display:none}.menu-button{display:block;margin-left:auto}.site-header.open nav{display:flex;position:absolute;top:66px;left:0;right:0;padding:22px;flex-direction:column;background:#fff;border-bottom:1px solid var(--line)}.hero{grid-template-columns:1fr;padding-top:54px}.hero-visual{height:390px}.stats{margin:-25px 20px 0;grid-template-columns:1fr 1fr;gap:22px}.stats div:nth-child(2){border-right:0}.section-heading{align-items:start;flex-direction:column;gap:4px}.exam-grid,.news-grid{grid-template-columns:1fr}.feature-grid{grid-template-columns:1fr 1fr}.download{flex-direction:column;align-items:flex-start}footer{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}@media(max-width:520px){.hero{padding-left:22px;padding-right:22px}.hero h1{font-size:40px}.hero-text{font-size:16px}.hero-actions{flex-direction:column}.hero-actions a{justify-content:center}.hero-visual{height:340px}.main-card{left:0;top:75px;width:88%}.score-card{width:145px;padding:16px}.memory-card{width:170px}.section,.feature-section{padding:72px 20px}.section-heading h2,.download h2{font-size:30px}.feature-grid{grid-template-columns:1fr}.download{margin:60px 20px;padding:36px 24px}.mini-points{flex-wrap:wrap}footer{grid-template-columns:1fr}.copyright{position:static}}