:root{--bg:#030a12;--panel:#071827;--line:rgba(91,194,255,.18);--txt:#f3f8fc;--mut:#9fb5c8;--cyan:#2bd4ff;--blue:#1977ff;--good:#48dfaa;--bad:#ff687f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--txt);background:radial-gradient(circle at 80% 0,#123866 0,#071626 30%,#030a12 68%);min-height:100vh}a{color:inherit}.top{height:72px;position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 4vw;background:rgba(3,10,18,.9);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.logo{display:flex;align-items:center;gap:12px;text-decoration:none}.logo img{width:112px;height:54px;object-fit:contain}.slogan{font-size:11px;color:#c2d4e5;white-space:nowrap}.nav{display:flex;gap:26px}.nav a{text-decoration:none;font-size:14px;color:#bfd0e0;padding:27px 0}.nav a.active,.nav a:hover{color:#fff}.mobile-menu{display:none;background:#0b1d30;border:1px solid var(--line);color:#fff;border-radius:10px;padding:9px 12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:12px;background:#0a2033;color:#fff;text-decoration:none;padding:12px 17px;font:inherit;cursor:pointer}.btn.primary{border:0;background:linear-gradient(90deg,var(--cyan),var(--blue));font-weight:800}.btn:disabled{opacity:.35}.kicker{text-transform:uppercase;letter-spacing:.2em;font-size:11px;font-weight:900;color:var(--cyan)}.hero{min-height:560px;padding:70px 6vw;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:40px;position:relative;overflow:hidden}.hero:before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,10,18,.97),rgba(3,10,18,.75) 48%,rgba(3,10,18,.2)),url('assets/hero4.png') center/cover;z-index:-1}.hero h1{font-size:clamp(44px,7vw,88px);line-height:.94;margin:8px 0 18px;letter-spacing:-.04em}.gradient{background:linear-gradient(180deg,#fff,#71dcff);-webkit-background-clip:text;color:transparent}.lead{font-size:18px;line-height:1.7;color:#c8d7e6;max-width:780px}.personal-card,.metric,.content-block,.sync-card,.contact{border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,rgba(11,34,54,.92),rgba(6,20,34,.92))}.personal-card{padding:24px}.bar{height:10px;background:#10283e;border-radius:99px;overflow:hidden}.bar>span{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--blue))}.section{padding:66px 6vw}.section h2{font-size:38px;margin:0 0 12px}.module-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}.module-card{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:linear-gradient(180deg,#0a2135,#061522)}.module-card img{width:100%;height:150px;object-fit:cover}.module-card .pad{padding:18px}.muted{color:var(--mut)}.timeline{display:grid;gap:12px;max-width:950px;margin-top:25px}.tl{display:grid;grid-template-columns:90px 1fr;gap:18px;padding:18px;border-left:3px solid var(--cyan);border-radius:0 14px 14px 0;background:#07192a}.footer{padding:28px 6vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:#8da5b9;font-size:12px}.course-shell{display:grid;grid-template-columns:310px minmax(0,1fr);min-height:calc(100vh - 72px)}.side{position:sticky;top:72px;height:calc(100vh - 72px);overflow:auto;border-right:1px solid var(--line);background:rgba(4,14,24,.96);padding:18px 12px}.progress-box{padding:14px;border:1px solid var(--line);border-radius:14px;margin-bottom:14px}.module-nav{margin:10px 0;border:1px solid rgba(91,194,255,.13);border-radius:13px;overflow:hidden}.module-nav .head{width:100%;border:0;background:#0a2033;color:#e6f4ff;padding:12px;text-align:left;font-weight:800;display:flex;justify-content:space-between}.lesson-list{padding:5px}.lesson-btn{width:100%;display:grid;grid-template-columns:30px 1fr;gap:9px;text-align:left;border:1px solid transparent;background:transparent;color:#abc1d4;border-radius:10px;padding:8px;cursor:pointer}.lesson-btn.active{color:#fff;background:linear-gradient(90deg,rgba(25,119,255,.28),rgba(43,212,255,.08));border-color:rgba(43,212,255,.28);box-shadow:inset 3px 0 0 var(--cyan)}.lesson-btn.done .num{color:var(--good)}.num{width:28px;height:28px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center}.course-main{width:100%;max-width:1080px;padding:32px 4vw 110px}.lesson-hero{min-height:235px;border:1px solid var(--line);border-radius:22px;overflow:hidden;position:relative;margin-bottom:24px;padding:32px;display:flex;align-items:center;background:linear-gradient(135deg,#081a2b 0%,#0b2b49 52%,#0a1c31 100%);box-shadow:0 18px 55px rgba(0,0,0,.18)}.lesson-hero:before{content:'';position:absolute;inset:-25% -10% auto auto;width:430px;height:430px;border-radius:50%;background:radial-gradient(circle,rgba(43,212,255,.18),rgba(25,119,255,.08) 38%,transparent 70%);filter:blur(3px)}.lesson-hero img{position:absolute;right:0;top:0;width:46%;height:100%;object-fit:cover;object-position:center;opacity:.20;filter:saturate(.8) contrast(1.05);-webkit-mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.85) 42%,#000 100%);mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.85) 42%,#000 100%)}.lesson-hero:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,10,18,.08) 0%,rgba(3,10,18,.02) 58%,rgba(3,10,18,.28) 100%);pointer-events:none}.lesson-title{position:relative;left:auto;right:auto;bottom:auto;z-index:2;width:min(72%,720px)}.lesson-title h1{font-size:42px;margin:5px 0 6px}.meta{display:flex;gap:8px;flex-wrap:wrap}.pill{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:rgba(6,21,35,.75);font-size:12px;color:#cde0f1}.lesson-article{font-size:17px;line-height:1.82;color:#dce8f3}.content-block{margin:24px 0;padding:22px}.content-block.concept{border-left:4px solid var(--cyan)}.content-block.example{border-left:4px solid #8e87ff}.content-block.risk{border-left:4px solid var(--bad)}.content-block.action{border-left:4px solid var(--good)}.diagram{margin:24px 0;padding:20px;border:1px solid var(--line);border-radius:20px;background:#04121e;overflow:hidden}.diagram svg{width:100%;height:auto;display:block}.pulse{animation:pulseNode 2s ease-in-out infinite}@keyframes pulseNode{50%{opacity:.45}}.flowline{stroke-dasharray:8 8;animation:dash 2.5s linear infinite}@keyframes dash{to{stroke-dashoffset:-32}}.lesson-controls{display:flex;justify-content:space-between;gap:12px;margin-top:28px}.test{margin-top:54px;padding:26px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(180deg,#0a2034,#061522)}.q{padding:18px 0;border-bottom:1px solid var(--line)}.opt{display:block;padding:10px 12px;border:1px solid var(--line);border-radius:10px;margin:8px 0}.result{display:none;margin-top:20px;padding:20px;border:1px solid rgba(72,223,170,.4);border-radius:14px;background:#08252d}.cert{margin-top:24px;padding:20px;border:1px solid var(--line);border-radius:18px}.cert img{width:100%;border-radius:12px}.mobile-bottom{display:none}.drawer-backdrop{display:none}.student-gate{position:fixed;inset:0;z-index:1000;background:rgba(2,8,14,.92);display:none;align-items:center;justify-content:center;padding:18px}.student-card{width:min(560px,100%);padding:26px;border:1px solid var(--line);border-radius:20px;background:#071827}.student-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.student-card input,.sync-card input,.contact input,.contact textarea{width:100%;margin-top:6px;padding:12px;border:1px solid var(--line);border-radius:10px;background:#04131f;color:#fff;font:inherit}.sync-card{padding:18px;margin-top:18px}.dashboard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{padding:18px}.metric b{font-size:28px}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}.about-image{height:420px;border-radius:22px;overflow:hidden;border:1px solid var(--line)}.about-image img{width:100%;height:100%;object-fit:cover}.contact{padding:22px}.contact textarea{min-height:140px;resize:vertical}.notice{padding:12px 14px;border:1px solid rgba(255,200,97,.35);border-radius:12px;background:rgba(255,200,97,.08);color:#f3ddb1;font-size:13px}.loading{padding:60px 0;text-align:center;color:var(--mut)}
@media(max-width:980px){.module-grid{grid-template-columns:repeat(2,1fr)}.dashboard-grid{grid-template-columns:repeat(2,1fr)}.slogan{display:none}.course-shell{grid-template-columns:1fr}.side{position:fixed;top:0;left:0;bottom:0;width:min(88vw,340px);height:100vh;z-index:220;transform:translateX(-105%);transition:.25s;padding-top:20px}.side.open{transform:none}.drawer-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.62);z-index:210}.drawer-backdrop.show{display:block}.course-main{padding:24px 20px 105px;margin:0 auto}.mobile-bottom{display:grid;grid-template-columns:1fr 1.2fr 1fr;position:fixed;z-index:190;left:0;right:0;bottom:0;background:rgba(4,14,24,.96);border-top:1px solid var(--line);padding:9px 10px calc(9px + env(safe-area-inset-bottom))}.mobile-bottom button{border:0;background:transparent;color:#dceaf6;padding:10px 5px;font-weight:700}.mobile-bottom button:nth-child(2){border-left:1px solid var(--line);border-right:1px solid var(--line);color:var(--cyan)}.lesson-controls{display:none}.about-grid,.hero{grid-template-columns:1fr}.nav{display:none}.mobile-menu{display:block}.top.open .nav{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;gap:0;background:#061522;border-bottom:1px solid var(--line);padding:10px 18px}.top.open .nav a{padding:14px}}
@media(max-width:640px){.top{padding:0 14px}.logo img{width:90px}.hero{padding:48px 20px;min-height:auto}.hero h1{font-size:48px}.section{padding:48px 20px}.section h2{font-size:31px}.module-grid,.dashboard-grid{grid-template-columns:1fr}.tl{grid-template-columns:1fr;gap:6px}.lesson-hero{min-height:205px;border-radius:17px;padding:22px}.lesson-hero img{width:62%;opacity:.16}.lesson-title{width:100%;left:auto;bottom:auto}.lesson-title h1{font-size:29px}.course-main{padding-left:15px;padding-right:15px}.content-block,.diagram,.test{padding:16px;border-radius:14px}.lesson-article{font-size:16px;line-height:1.72}.student-grid{grid-template-columns:1fr}.footer{flex-direction:column}.about-image{height:230px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}