.portal-grid{align-items:stretch}.portal-card,.portal-card.portal-split{height:100%;min-height:290px}.portal-top,.portal-main,.portal-bottom{width:100%}.portal-top{align-items:center;justify-content:space-between}.portal-top span,.portal-main h2,.portal-main p,.portal-bottom{white-space:normal}.portal-main h2{color:var(--foreground)}.portal-main p{color:var(--muted-foreground)}.portal-bottom{color:var(--theme-dim)}.nova-entry svg{color:var(--theme-accent)}.nova-orbit{display:flex;align-items:center;gap:14px;padding:12px 16px;border:1px solid var(--line-subtle);border-radius:12px;color:var(--foreground);transition:background .2s,border-color .2s,transform .2s}.nova-orbit:hover{background:var(--secondary);border-color:var(--theme-dim);transform:translateY(-2px)}.nova-orbit-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:color-mix(in srgb,var(--theme-accent) 14%,transparent);color:var(--theme-accent);animation:novaPulse 2.8s ease-in-out infinite}.nova-orbit-copy{display:flex;flex-direction:column;line-height:1.35}.nova-orbit-copy b{font-size:16px;font-weight:600}.nova-orbit-copy small{font-size:11px;color:var(--muted-foreground)}.nova-orbit>svg{color:var(--theme-accent);margin-left:auto}@keyframes novaPulse{0%,100%{transform:scale(1);box-shadow:0 0 0 0 color-mix(in srgb,var(--theme-accent) 24%,transparent)}50%{transform:scale(1.06);box-shadow:0 0 0 8px transparent}}.portal-card.portal-split{padding:0;display:flex;flex-direction:column;overflow:hidden}.portal-split-main{display:flex;flex-direction:column;flex:1;margin:0}.portal-split-link{position:relative;flex:1;display:flex;flex-direction:column;align-items:stretch;text-align:left;width:100%;border:0;border-bottom:1px solid var(--line-subtle);background:transparent;color:var(--foreground);padding:22px 27px 23px;transition:background .3s,transform .2s;min-height:0}.portal-split-link:last-child{border-bottom:0}.portal-split-link::before{display:block;font-family:Consolas,'Courier New',monospace;font-size:10px;letter-spacing:2px;color:var(--theme-dim);margin-bottom:18px}.portal-split-link:first-child::before{content:'04 / STUDY'}.portal-split-link:last-child::before{content:'05 / EXPLORE'}.portal-split-link span{display:block;font-family:'Songti SC','Noto Serif SC','SimSun',serif;font-size:30px;font-weight:400;letter-spacing:4px;line-height:1.2}.portal-split-link small{display:block;font-size:12px;letter-spacing:.5px;color:var(--muted-foreground);margin-top:12px;line-height:1.8}.portal-split-link svg{position:absolute;right:24px;bottom:22px;color:var(--theme-accent);transition:transform .25s}.portal-split-link:hover{background:linear-gradient(155deg,var(--surface-hover),transparent)}.portal-split-link:hover svg{transform:translate(3px,-3px)}@media(max-width:760px){.nova-orbit{width:100%}.nova-orbit-copy small{font-size:10px}.portal-card,.portal-card.portal-split{min-height:252px}.portal-split-link{padding:20px 18px}.portal-split-link span{font-size:24px}.portal-split-link svg{right:18px;bottom:18px}}