:root{
  --bg:#eef5ff;
  --panel:rgba(255,255,255,.86);
  --card:#fff;
  --text:#142033;
  --muted:#64748b;
  --line:rgba(91,111,145,.16);
  --primary:#5661e9;
  --primary2:#256fdb;
  --cyan:#24a7d8;
  --shadow:0 18px 42px rgba(31,52,91,.08);
  --radius:26px;
  --sidebar:272px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:linear-gradient(180deg,#eef5ff,#f8fbff);color:var(--text);-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit}button{cursor:pointer}a{text-decoration:none;color:inherit}p,h1,h2,h3,h4{margin-top:0}.app{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr);gap:18px;padding:14px;min-height:100vh}.sidebar{position:sticky;top:14px;height:calc(100vh - 28px);border-radius:28px;background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow);padding:18px 12px 14px;display:grid;grid-template-rows:auto auto 1fr auto;gap:14px;backdrop-filter:blur(18px)}.brand{display:flex;gap:12px;align-items:center;padding:0 8px 12px;border-bottom:1px solid var(--line)}.logo{width:42px;height:42px;border-radius:15px;background:linear-gradient(135deg,var(--primary),var(--primary2));display:grid;place-items:center;color:#fff;font-weight:900}.brand strong{display:block;font-size:15px}.brand span{font-size:12px;color:var(--muted)}.caption{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:#91a2bc;font-weight:900;padding:0 10px}.nav{overflow:auto;display:grid;gap:4px;padding-right:4px;scrollbar-width:thin;scrollbar-color:rgba(100,116,139,.18) transparent}.nav::-webkit-scrollbar{width:6px}.nav::-webkit-scrollbar-thumb{border-radius:999px;background:rgba(100,116,139,.18)}.nav button{position:relative;border:0;background:rgba(255,255,255,.18);border-radius:15px;display:grid;grid-template-columns:30px 1fr;gap:9px;align-items:center;padding:7px 9px;text-align:left;color:#334155;transition:.18s}.nav button:hover{background:rgba(255,255,255,.48)}.nav button.active{background:rgba(255,255,255,.62);color:#3340d4;box-shadow:inset 0 0 0 1px rgba(86,97,233,.13)}.nav button.active:before{content:"";position:absolute;left:-4px;top:11px;bottom:11px;width:3px;border-radius:999px;background:linear-gradient(180deg,var(--primary),var(--cyan))}.nav-ico{width:30px;height:30px;border-radius:13px;background:rgba(100,116,139,.09);display:grid;place-items:center;font-size:15px}.nav-copy strong{display:block;font-size:13px;line-height:1.18}.nav-copy span{display:block;font-size:10.5px;color:#64748b;margin-top:1px}.tip{background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:20px;padding:14px}.tip p{font-size:12.5px;color:var(--muted);line-height:1.6;margin:0 0 10px}.tip button{border:0;background:rgba(86,97,233,.1);color:var(--primary);font-weight:800;border-radius:999px;height:36px;padding:0 12px}.main{border-radius:30px;background:rgba(255,255,255,.82);border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow);padding:18px;min-width:0}.top{display:flex;justify-content:flex-end;align-items:center;margin-bottom:16px}.search{border:1px solid var(--line);background:#fff;border-radius:18px;height:48px;min-width:270px;padding:0 16px;display:flex;gap:12px;align-items:center;justify-content:space-between;color:var(--muted)}kbd{border:1px solid var(--line);border-radius:999px;padding:3px 8px;background:#f6f8fb;color:#94a3b8;font-size:11px}.section{border-radius:28px;background:rgba(255,255,255,.8);border:1px solid rgba(255,255,255,.82);box-shadow:var(--shadow);padding:22px;margin-bottom:16px}.badge{display:inline-flex;align-items:center;border-radius:999px;background:rgba(86,97,233,.1);color:var(--primary);padding:7px 13px;font-weight:900;font-size:13px}.hero h1{font-size:clamp(38px,4.4vw,58px);line-height:.98;letter-spacing:-.06em;margin:16px 0 12px;background:linear-gradient(90deg,#3340d4,#5661e9,#256fdb);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero>p{color:#52627a;font-size:14.5px}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:18px}.spot{display:grid;grid-template-columns:minmax(0,1fr) 160px;gap:18px;border-radius:28px;background:radial-gradient(circle at 84% 24%,rgba(36,167,216,.22),transparent 32%),linear-gradient(135deg,rgba(86,97,233,.1),rgba(36,167,216,.14));border:1px solid rgba(145,168,204,.25);padding:26px;margin-top:24px}.spot h2{font-size:clamp(24px,2.6vw,34px);letter-spacing:-.04em;line-height:1.1;margin-bottom:12px}.spot p{font-size:14.5px;color:#52627a;line-height:1.7}.cta{width:fit-content;max-width:100%;display:grid;grid-template-columns:repeat(3,minmax(132px,1fr));gap:8px;padding:8px;margin-top:18px;border-radius:22px;background:rgba(255,255,255,.58);border:1px solid rgba(148,163,184,.22);box-shadow:0 14px 28px rgba(47,111,219,.08),inset 0 1px 0 rgba(255,255,255,.72);backdrop-filter:blur(18px)}.cta a{height:42px;border-radius:16px;display:flex;align-items:center;justify-content:center;gap:7px;font-weight:900;font-size:14px;white-space:nowrap}.cta a:nth-child(1),.cta a:nth-child(3){background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}.cta a:nth-child(2){background:rgba(255,255,255,.82);border:1px solid var(--line)}.cta a:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(47,111,219,.13)}.rocket{width:140px;height:140px;border-radius:34px;background:rgba(255,255,255,.65);display:grid;place-items:center;font-size:54px;margin:auto}.stats{display:grid;gap:14px}.stat{background:#fff;border-radius:24px;padding:18px;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow);color:#64748b}.stat strong{font-size:20px;color:#142033}.quick{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.quick-card{background:#fff;border-radius:24px;padding:18px;box-shadow:var(--shadow)}.quick-card .icon{width:52px;height:52px;border-radius:18px;display:grid;place-items:center;background:rgba(86,97,233,.1);font-size:25px}.quick-card h3{font-size:16px;margin:14px 0 8px}.quick-card p{font-size:13px;color:#64748b;line-height:1.6}.quick-card a{font-weight:900;color:var(--primary)}.title{font-size:34px;letter-spacing:-.05em;margin:0 0 8px}.sub{color:#64748b;font-size:14px;margin-bottom:18px}.tabs{display:flex;flex-wrap:wrap;gap:8px;padding:4px;background:#f0f4fb;border-radius:999px;width:max-content;max-width:100%;overflow:auto}.tab{border:0;background:transparent;border-radius:999px;height:34px;padding:0 15px;color:#475569;font-weight:800;font-size:13px}.tab.active{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px}.course-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));grid-auto-rows:218px;gap:16px}.course-card{height:218px;background:#fff;border-radius:24px;padding:16px;box-shadow:var(--shadow);display:grid;grid-template-columns:56px minmax(0,1fr);gap:16px;overflow:hidden}.course-card.recommended{background:linear-gradient(135deg,rgba(86,97,233,.08),rgba(36,167,216,.08));box-shadow:0 16px 30px rgba(86,97,233,.13)}.step{width:48px;height:48px;border-radius:17px;background:linear-gradient(135deg,var(--primary),var(--primary2));display:grid;place-items:center;color:#fff;font-size:24px;font-weight:900}.course-card h3{font-size:21px;line-height:1.18;margin:2px 0 7px}.course-card p{color:#64748b;font-size:13.5px;line-height:1.55;margin-bottom:12px}.tags{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}.tag{display:inline-flex;align-items:center;height:24px;border-radius:999px;background:#eef2f7;color:#64748b;padding:0 9px;font-size:12px;font-weight:800}.course-actions{display:flex;gap:10px;margin-top:auto}.btn{border:0;border-radius:14px;height:40px;padding:0 15px;font-weight:900}.btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}.btn.secondary{background:#fff;border:1px solid var(--line)}.recommend{background:#fff;border-radius:24px;padding:18px;box-shadow:var(--shadow);height:max-content}.recommend h3{font-size:23px;margin-bottom:8px}.recommend p{font-size:13px;color:#64748b;line-height:1.6}.recommend select,.recommend button{width:100%;height:46px;border-radius:15px;border:1px solid var(--line);background:#fff;margin-top:10px;padding:0 12px}.recommend button{border:0;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:900}.result{margin-top:12px;background:#f7f9ff;border-radius:16px;padding:12px;color:#475569;font-size:13px}.module{background:#fff;border-radius:28px;padding:28px;box-shadow:var(--shadow);margin-bottom:16px;scroll-margin-top:22px}.module-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.module h2,.module h3{font-size:22px;margin:0;letter-spacing:-.03em;position:relative;padding-left:14px}.module h2:before,.module h3:before{content:"";position:absolute;left:0;top:4px;width:4px;height:22px;border-radius:999px;background:var(--primary)}.notice{font-size:12.5px;color:#8492a6}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;align-items:start}.card{position:relative;min-height:176px;background:#fff;border:1px solid rgba(255,255,255,.82);border-radius:22px;padding:16px;box-shadow:var(--shadow);cursor:pointer;transition:.18s}.card:hover{transform:translateY(-3px);border-color:rgba(86,97,233,.28)}.card:after{content:attr(data-tooltip);position:absolute;left:18px;right:18px;bottom:calc(100% + 10px);background:rgba(20,32,51,.95);color:#fff;border-radius:14px;padding:10px 12px;font-size:12px;line-height:1.55;box-shadow:0 16px 28px rgba(20,32,51,.18);opacity:0;pointer-events:none;transform:translateY(6px);transition:.16s;z-index:20}.card:hover:after{opacity:1;transform:translateY(0)}.card-main{display:grid;grid-template-columns:52px minmax(0,1fr);gap:12px}.card-logo{width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;display:grid;place-items:center;font-weight:900;font-size:14px}.card-logo.green{background:linear-gradient(135deg,#0ea977,#14c38e)}.card-logo.orange{background:linear-gradient(135deg,#f7972d,#ff6852)}.card-logo.dark{background:linear-gradient(135deg,#1d2335,#46516a)}.card-logo.purple{background:linear-gradient(135deg,#715cff,#4e74ff)}.card-logo.emoji{font-size:24px}.card h4{font-size:16px;line-height:1.25;margin:0 0 8px}.card p{color:#64748b;font-size:12.5px;line-height:1.55;min-height:58px;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:14px}.arrow{width:30px;height:30px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:#94a3b8}.modal{position:fixed;inset:0;background:rgba(15,23,42,.42);backdrop-filter:blur(10px);display:none;z-index:100}.modal.open{display:block}.modal-panel{position:relative;background:rgba(255,255,255,.96);border-radius:28px;box-shadow:0 22px 60px rgba(15,23,42,.18);margin:6vh auto 0;padding:24px 28px}.modal-close{position:absolute;right:18px;top:18px;border:0;background:#fff;border-radius:16px;width:42px;height:42px;font-size:22px}.course-modal{width:min(920px,calc(100vw - 80px))}.course-modal h3{font-size:24px;margin:8px 0 12px}.course-modal p{color:#52627a;font-size:14px}.meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0 16px}.meta div{background:#f8fbff;border:1px solid var(--line);border-radius:16px;min-height:70px;padding:12px 14px}.meta span{display:block;color:#64748b;font-size:12px}.meta strong{font-size:18px}.bullets{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px;list-style:none;padding:0;margin:14px 0 18px}.bullets li{font-size:13.5px;color:#334155}.bullets li:before{content:"✓";color:#10b981;margin-right:8px;font-weight:900}.outline{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.outline div{background:#f8fbff;border:1px solid var(--line);border-radius:16px;min-height:92px;padding:13px 14px}.outline strong{font-size:14px}.outline span{display:block;margin-top:4px;font-size:12.5px;color:#475569}.modal-actions{display:flex;gap:10px;margin-top:18px}.video-modal{width:min(980px,calc(100vw - 48px))}.video{background:#000;border-radius:22px;overflow:hidden;aspect-ratio:16/9}.video video{width:100%;height:100%}.search-modal{width:min(720px,calc(100vw - 36px))}.search-input{width:100%;height:52px;border:1px solid var(--line);border-radius:18px;padding:0 14px}.search-results{display:grid;gap:10px;margin-top:14px}.search-results button{border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px;text-align:left}.mobile{display:none}
@media(max-width:1200px){.hero-grid,.course-layout{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.quick{grid-template-columns:repeat(2,1fr)}}
@media(max-width:900px){.app{display:block}.sidebar{position:fixed;z-index:80;left:12px;top:12px;width:min(320px,calc(100vw - 24px));transform:translateX(calc(-100% - 24px));transition:.22s}.sidebar.open{transform:translateX(0)}.mobile{display:inline-grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:15px}.top{justify-content:space-between}.main{border-radius:24px;padding:14px}.section,.module{padding:18px}.spot{grid-template-columns:1fr}.quick,.grid,.course-list{grid-template-columns:1fr}.course-list{grid-auto-rows:auto}.course-card{height:auto;grid-template-columns:1fr}.meta,.bullets,.outline{grid-template-columns:1fr}.course-modal{width:min(720px,calc(100vw - 36px));max-height:84vh;overflow:auto}.cta{grid-template-columns:1fr;width:100%}}


.logo img,.nav-ico img,.card-logo img{width:100%;height:100%;object-fit:contain;display:block}
.logo.has-image{background:#fff;padding:6px;border:1px solid rgba(86,97,233,.15)}
.nav-ico.has-image{background:#fff;padding:5px;border:1px solid rgba(148,163,184,.18)}
.card-logo.has-image{background:#fff!important;padding:7px;border:1px solid rgba(148,163,184,.2)}
.badge img{width:16px;height:16px;object-fit:contain;margin-right:6px}


.search-empty{border:1px dashed var(--line);background:#f8fbff;border-radius:18px;padding:24px;text-align:center;color:#64748b}
.search-empty strong{display:block;color:#142033;font-size:17px;margin-bottom:6px}
.search-empty p{margin:0;font-size:13px;line-height:1.6}
.search-summary{font-size:12.5px;color:#64748b;margin:8px 0 10px}
.search-pages{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:12px}
.search-pages button{border:1px solid var(--line);background:#fff;border-radius:999px;height:34px;padding:0 13px;color:#334155;font-weight:800}
.search-pages button:disabled{opacity:.45;cursor:not-allowed}