:root{
  --bg:#F7F4FF;--surface:#FFFFFF;--soft:#EEF2FF;--title:#1B1340;--text:#2F2A4A;--muted:#5B5678;--faint:#8B86A3;
  --purple:#7C3AED;--purple2:#A78BFA;--teal:#14B8A6;--coral:#F97316;--pink:#E11D48;--amber:#F59E0B;--indigo:#312E81;
  --border:rgba(124,58,237,.14);--shadow:0 16px 40px rgba(49,46,129,.10);--radius:24px;--max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}
body.overlay-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%;height:auto}
:focus-visible{outline:3px solid rgba(124,58,237,.34);outline-offset:3px}
.site-main{padding-top:104px}
.container{width:min(calc(100% - 32px),var(--max));margin:0 auto}
.narrow{width:min(calc(100% - 32px),860px);margin:0 auto}
.section{padding:54px 0}
.section-sm{padding:34px 0}
.hero-section{padding:30px 0 44px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:10px;color:var(--purple);font-weight:800;font-size:.84rem;letter-spacing:.08em;text-transform:uppercase}
.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--purple2),var(--teal))}
h1,h2,h3,p{margin-top:0}
h1{margin-bottom:18px;color:var(--title);font-size:clamp(2rem,5vw,4.7rem);line-height:1.05;letter-spacing:-.04em}
h2{color:var(--title);font-size:clamp(1.45rem,3vw,2.4rem);line-height:1.18;letter-spacing:-.025em}
h3{color:var(--title);font-size:1.08rem;line-height:1.35}
p{margin-bottom:1em}
.lead{max-width:780px;color:var(--muted);font-size:clamp(1rem,1.7vw,1.16rem)}
.intro-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:48px;align-items:center}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 20px;border-radius:999px;font-weight:800;transition:.2s ease}
.btn{background:linear-gradient(135deg,#A78BFA 0%,#7C3AED 50%,#14B8A6 100%);color:#fff;box-shadow:0 10px 24px rgba(124,58,237,.18)}
.btn:hover{transform:translateY(-2px)}
.btn-ghost{background:#fff;border:1px solid var(--border);color:var(--indigo)}
.btn-ghost:hover{border-color:rgba(124,58,237,.34);background:#F9F7FF}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:26px}
.soft-card{background:var(--soft);border-radius:var(--radius);padding:26px}
.media-slot{position:relative;overflow:hidden;margin:0;aspect-ratio:4/3;border-radius:28px;background:linear-gradient(145deg,#EFE9FF,#E8FBF7);border:1px solid var(--border)}
.media-slot img{width:100%;height:100%;object-fit:cover}
.media-slot.tall{aspect-ratio:4/5}.media-slot.wide{aspect-ratio:16/9}.media-slot.phone{aspect-ratio:9/14}.media-slot.square{aspect-ratio:1}
.media-placeholder{position:absolute;inset:0;display:block;background:
 radial-gradient(circle at 22% 28%,rgba(167,139,250,.65),transparent 22%),
 radial-gradient(circle at 76% 70%,rgba(20,184,166,.34),transparent 26%),
 linear-gradient(135deg,#F3EEFF,#F0FFFB)}
.media-placeholder i{position:absolute;border-radius:999px;filter:blur(.2px)}
.media-placeholder i:nth-child(1){width:35%;height:12%;left:12%;top:58%;background:rgba(124,58,237,.18);transform:rotate(-10deg)}
.media-placeholder i:nth-child(2){width:18%;height:18%;right:17%;top:19%;background:rgba(249,115,22,.17)}
.media-placeholder i:nth-child(3){width:11%;height:11%;left:25%;top:22%;background:rgba(225,29,72,.12)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-head p{max-width:560px;margin-bottom:2px;color:var(--muted)}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.tag-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.tag-item{padding:18px;border-radius:20px;background:#fff;border:1px solid var(--border);min-height:128px}.tag-item .dot{display:block;width:11px;height:11px;border-radius:50%;margin-bottom:16px}.tag-item:nth-child(4n+1) .dot{background:var(--purple)}.tag-item:nth-child(4n+2) .dot{background:var(--teal)}.tag-item:nth-child(4n+3) .dot{background:var(--coral)}.tag-item:nth-child(4n+4) .dot{background:var(--pink)}.tag-item strong{display:block;color:var(--title);margin-bottom:5px}.tag-item span{display:block;color:var(--muted);font-size:.92rem;line-height:1.6}
.split-feature{display:grid;grid-template-columns:220px minmax(0,1fr);gap:26px;align-items:start}.number-list{display:grid;gap:10px}.number-list a{display:flex;align-items:center;gap:10px;min-height:48px;padding:8px 12px;border-radius:16px;background:#fff;border:1px solid var(--border);font-weight:700}.number-list a b{color:var(--purple);font-size:1.1rem}.number-list a:hover{background:var(--soft)}
.mosaic{display:grid;grid-template-columns:1.2fr .8fr;grid-template-areas:"a b" "a c";gap:20px}.mosaic article{overflow:hidden}.mosaic .a{grid-area:a}.mosaic .b{grid-area:b}.mosaic .c{grid-area:c}.mosaic .media-slot{border-radius:0;box-shadow:none;border:0;border-bottom:1px solid var(--border)}.mosaic .a .media-slot{aspect-ratio:4/3}.mosaic .b .media-slot,.mosaic .c .media-slot{aspect-ratio:16/7}.mosaic-copy{padding:22px}.mosaic-copy p{color:var(--muted);margin-bottom:12px}
.folder-list{display:grid;gap:12px}.folder-row{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:16px;align-items:center;padding:18px 20px;border-radius:20px;background:#fff;border:1px solid var(--border)}.folder-icon{width:48px;height:38px;border-radius:10px 12px 12px 12px;background:linear-gradient(135deg,#D9CCFF,#A78BFA);position:relative}.folder-icon:before{content:"";position:absolute;left:4px;top:-6px;width:22px;height:9px;border-radius:6px 6px 0 0;background:#C4B5FD}.folder-row p{margin:3px 0 0;color:var(--muted);font-size:.92rem}.folder-row .arrow{color:var(--purple);font-weight:900}
.rank-list{display:grid;gap:10px}.rank-row{display:grid;grid-template-columns:88px minmax(0,1fr) auto;gap:18px;align-items:center;padding:18px 22px;background:#fff;border:1px solid var(--border);border-radius:20px}.rank-num{font-size:clamp(2.1rem,5vw,4.4rem);font-weight:900;line-height:1}.rank-row:nth-child(5n+1) .rank-num{color:var(--purple)}.rank-row:nth-child(5n+2) .rank-num{color:var(--teal)}.rank-row:nth-child(5n+3) .rank-num{color:var(--coral)}.rank-row:nth-child(5n+4) .rank-num{color:var(--pink)}.rank-row:nth-child(5n+5) .rank-num{color:var(--amber)}.rank-row p{margin:4px 0 0;color:var(--muted)}.rank-row .rank-link{font-weight:800;color:var(--indigo)}
.timeline{position:relative;margin-left:13px;padding-left:34px}.timeline:before{content:"";position:absolute;left:7px;top:10px;bottom:10px;width:2px;background:linear-gradient(var(--purple2),var(--teal))}.timeline-item{position:relative;margin-bottom:18px;padding:20px 22px;background:#fff;border:1px solid var(--border);border-radius:20px}.timeline-item:before{content:"";position:absolute;left:-34px;top:27px;width:14px;height:14px;border:4px solid var(--bg);border-radius:50%;background:var(--purple)}.status{display:inline-flex;padding:5px 10px;border-radius:999px;background:var(--soft);color:var(--indigo);font-size:.8rem;font-weight:800}.timeline-item p{margin:8px 0 0;color:var(--muted)}
.quote-note{border-left:4px solid var(--purple);padding:12px 0 12px 18px;color:var(--muted)}
.article-stack{display:grid;gap:18px}.article-block{background:#fff;border:1px solid var(--border);border-radius:22px;padding:24px}.article-block h2,.article-block h3{margin-bottom:10px}.article-block p:last-child{margin-bottom:0}
.topic-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.topic-index a{display:block;padding:20px;border-radius:20px;background:#fff;border:1px solid var(--border)}.topic-index span{display:block;margin-top:6px;color:var(--muted);font-size:.92rem}
.steps{counter-reset:step;display:grid;gap:15px}.step{position:relative;padding:24px 24px 24px 82px;background:#fff;border:1px solid var(--border);border-radius:22px}.step:before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;left:22px;top:18px;font-size:1.8rem;font-weight:900;color:var(--purple)}.step p:last-child{margin-bottom:0}
.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:20px;padding:22px}.faq-item h2{font-size:1.04rem;margin-bottom:10px}.faq-item p{margin-bottom:0;color:var(--muted)}
.notice{padding:18px 20px;border-radius:18px;background:#FFF8ED;border:1px solid rgba(245,158,11,.18);color:#6B4A12}.notice strong{color:#4D3300}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;color:var(--faint);font-size:.9rem}.breadcrumbs a:hover{color:var(--purple)}
.pill-row{display:flex;flex-wrap:wrap;gap:9px}.mini-pill{display:inline-flex;align-items:center;min-height:38px;padding:6px 12px;border-radius:999px;background:#fff;border:1px solid var(--border);font-size:.9rem;color:var(--indigo)}
.longread{font-size:1.02rem}.longread h2{margin-top:34px}.longread p{color:var(--text)}.editor-label{display:inline-flex;padding:6px 10px;border-radius:999px;background:#F2EAFF;color:var(--purple);font-weight:800;font-size:.82rem}
.product-grid{display:grid;grid-template-columns:minmax(280px,.75fr) minmax(0,1.25fr);gap:38px;align-items:center}.feature-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.feature-card{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--border)}.feature-card h3{margin-bottom:7px}.feature-card p{margin:0;color:var(--muted);font-size:.93rem}
.legal-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:20px}.legal-index a{padding:16px 18px;border-radius:18px;background:var(--soft);color:var(--indigo);font-weight:800}
.cta-band{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px;border-radius:28px;background:linear-gradient(135deg,#312E81,#7C3AED 60%,#14B8A6);color:#fff}.cta-band h2{color:#fff;margin-bottom:6px}.cta-band p{margin:0;color:#F4F0FF;max-width:720px}.cta-band .btn-ghost{background:#fff;color:var(--indigo);border:0}

.top-shell{position:fixed;top:0;left:0;right:0;z-index:80;pointer-events:none}.desktop-brandbar{pointer-events:auto;width:min(calc(100% - 32px),1080px);height:64px;margin:16px auto 0;display:grid;grid-template-columns:44px 1fr auto 1fr 44px;align-items:center;gap:10px;padding:8px 10px;background:rgba(255,255,255,.94);border:1px solid var(--border);border-radius:999px;box-shadow:0 12px 34px rgba(49,46,129,.13);backdrop-filter:blur(14px)}
.brandbar-group{display:flex;gap:4px;min-width:0}.brandbar-left{justify-content:flex-end}.brandbar-right{justify-content:flex-start}.pill-link{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:7px 11px;border:1px solid transparent;border-radius:999px;color:var(--muted);font-size:.87rem;font-weight:700;white-space:nowrap}.pill-link:hover{background:var(--soft);color:var(--indigo)}.pill-link.is-current{border-color:var(--purple);color:var(--purple);background:#fff}.app-pill{background:var(--soft);color:var(--indigo)}
.circle-control,.close-control{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--border);border-radius:50%;background:#fff;color:var(--indigo);font-size:1.25rem;font-weight:800}.circle-control:hover,.close-control:hover{background:var(--soft)}
.brand-center{display:flex;align-items:center;justify-content:center;min-width:84px;height:46px;padding:4px 10px;border-radius:999px}.brand-center.is-current{background:var(--soft)}.brand-mark{max-height:32px;max-width:112px;object-fit:contain}.brand-mark-fallback{display:inline-flex;align-items:center;justify-content:center;color:var(--title);font-weight:950;letter-spacing:-.04em}.mobile-topbar{display:none;pointer-events:auto}

.site-footer{margin-top:70px;padding:54px 0 calc(36px + env(safe-area-inset-bottom));background:#1B1340;color:#F4F0FF}.footer-inner{width:min(calc(100% - 32px),var(--max));margin:0 auto}.footer-brand-row{display:grid;grid-template-columns:1fr 1.6fr;gap:34px;align-items:start;padding-bottom:30px;border-bottom:1px solid rgba(244,240,255,.13)}.footer-brand{display:flex;align-items:center;gap:14px}.footer-brand span{display:flex;flex-direction:column}.footer-brand strong{font-size:1.2rem}.footer-brand small{color:#C8C1E7}.footer-logo{max-width:120px}.footer-brand-row p{margin:0;color:#D4CDEF}.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;padding:32px 0}.footer-grid section{display:grid;align-content:start;gap:7px}.footer-grid h2{color:#fff;font-size:.92rem;margin:0 0 7px}.footer-grid a{color:#D7D0EF;font-size:.92rem}.footer-grid a:hover{color:#fff}.footer-bottom{display:flex;flex-wrap:wrap;gap:16px;padding-top:22px;border-top:1px solid rgba(244,240,255,.13);color:#C8C1E7;font-size:.88rem}.footer-bottom span{margin-right:auto}

.site-drawer{position:fixed;z-index:110;left:50%;bottom:0;width:min(100%,720px);max-height:78vh;transform:translate(-50%,105%);background:#fff;border:1px solid var(--border);border-radius:28px 28px 0 0;box-shadow:0 -24px 60px rgba(27,19,64,.22);visibility:hidden;pointer-events:none;transition:transform .26s ease,visibility .26s}.site-drawer.is-open{transform:translate(-50%,0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--border)}.drawer-brand{display:flex;align-items:center;gap:12px}.drawer-brand>span{display:flex;flex-direction:column}.drawer-brand small{color:var(--muted)}.drawer-logo{max-height:32px}.drawer-scroll{overflow:auto;max-height:calc(78vh - 82px);padding:18px 20px 26px}.drawer-group{margin-bottom:22px}.drawer-group h2{font-size:.88rem;color:var(--purple);margin-bottom:10px}.drawer-group a{display:grid;grid-template-columns:120px 1fr;gap:14px;padding:11px 12px;border-radius:14px}.drawer-group a:hover{background:var(--soft)}.drawer-group strong{color:var(--title)}.drawer-group span{color:var(--muted);font-size:.88rem}
.page-mask{position:fixed;inset:0;z-index:100;background:rgba(27,19,64,.28);opacity:0;visibility:hidden;pointer-events:none;transition:.22s ease}.page-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}
.search-panel{position:fixed;z-index:120;top:92px;left:50%;width:min(calc(100% - 32px),760px);transform:translate(-50%,-16px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}.search-panel.is-open{transform:translate(-50%,0);opacity:1;visibility:visible;pointer-events:auto}.search-card{padding:22px;background:#F7F4FF;border:1px solid var(--border);border-radius:26px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:start;justify-content:space-between;gap:20px}.search-head h2{font-size:1.45rem;margin-bottom:14px}.search-field{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--border);border-radius:999px;padding:0 16px;min-height:50px}.search-field input{width:100%;border:0;outline:0;background:transparent;color:var(--text)}.search-presets{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px}.search-presets a{display:inline-flex;align-items:center;min-height:40px;padding:7px 13px;border-radius:999px;background:#fff;border:1px solid var(--border);font-weight:700;color:var(--indigo)}.search-presets a:hover{border-color:var(--purple)}.search-note{margin:14px 0 0;color:var(--faint);font-size:.85rem}
.mobile-island{display:none}

@media (max-width:1020px){
  .desktop-brandbar{grid-template-columns:44px 1fr auto 1fr 44px}.pill-link{padding:7px 8px;font-size:.78rem}.brand-center{min-width:72px}.brand-mark{max-width:94px}
  .tag-track{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:820px){
  .site-main{padding-top:84px;padding-bottom:74px}.desktop-brandbar{display:none}.mobile-topbar{display:grid;width:min(calc(100% - 24px),760px);grid-template-columns:44px 1fr auto;align-items:center;gap:12px;height:58px;margin:12px auto 0;padding:6px 8px;background:rgba(255,255,255,.96);border:1px solid var(--border);border-radius:999px;box-shadow:0 10px 28px rgba(49,46,129,.12)}.mobile-brand{display:flex;align-items:center;justify-content:center;min-width:0}.mobile-logo{max-width:108px;max-height:30px}.mobile-app-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:6px 14px;border-radius:999px;background:var(--soft);color:var(--indigo);font-weight:800}.mobile-app-link.is-current{background:var(--purple);color:#fff}
  .intro-grid,.product-grid,.footer-brand-row{grid-template-columns:1fr}.intro-grid{gap:26px}.split-feature{grid-template-columns:1fr}.number-list{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3,.topic-index,.legal-index{grid-template-columns:repeat(2,minmax(0,1fr))}.mosaic{grid-template-columns:1fr;grid-template-areas:"a" "b" "c"}.mosaic .b .media-slot,.mosaic .c .media-slot{aspect-ratio:16/9}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer{padding-bottom:calc(102px + env(safe-area-inset-bottom))}
  .mobile-island{position:fixed;z-index:70;left:16px;right:16px;bottom:calc(12px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(5,1fr);height:52px;padding:4px 7px;background:rgba(255,255,255,.96);border:1px solid var(--border);border-radius:20px;box-shadow:0 12px 34px rgba(49,46,129,.18);backdrop-filter:blur(14px)}.mobile-island a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-width:0;color:var(--muted);font-size:.72rem;font-weight:700}.mobile-island .nav-dot{width:5px;height:5px;border-radius:50%;background:transparent}.mobile-island a.is-current{color:var(--purple)}.mobile-island a.is-current .nav-dot{background:var(--purple)}
  .search-panel{inset:0;width:100%;height:100dvh;transform:none;background:#F7F4FF;padding:14px;opacity:0}.search-panel.is-open{transform:none;opacity:1}.search-card{height:100%;border-radius:22px;box-shadow:none;padding-top:20px;overflow:auto}
  .site-drawer{width:100%;max-height:78vh}.drawer-scroll{max-height:calc(78vh - 82px)}
}
@media (max-width:600px){
  .section{padding:40px 0}.hero-section{padding-top:22px}.container,.narrow{width:min(calc(100% - 32px),var(--max))}.section-head{display:block}.section-head p{margin-top:-4px}.grid-2,.grid-3,.grid-4,.topic-index,.legal-index,.feature-list,.tag-track{grid-template-columns:1fr}.number-list{grid-template-columns:1fr}.folder-row{grid-template-columns:48px minmax(0,1fr) 18px;padding:16px}.rank-row{grid-template-columns:64px minmax(0,1fr);padding:16px}.rank-row .rank-link{grid-column:2}.rank-num{font-size:2.4rem}.cta-band{align-items:flex-start;flex-direction:column;padding:24px}.drawer-group a{grid-template-columns:1fr;gap:2px;padding:10px 8px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.footer-brand-row{gap:18px}.step{padding:20px 18px 20px 68px}.step:before{left:18px;font-size:1.5rem}.timeline{padding-left:28px}.timeline-item:before{left:-28px}.timeline:before{left:7px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.board-wall{columns:3;column-gap:18px}.board-tile{break-inside:avoid;margin:0 0 18px;padding:24px;background:#fff;border:1px solid var(--border);border-radius:24px}.board-tile:nth-child(2n){background:var(--soft)}.board-tile:nth-child(3n){padding-block:34px}.board-tile p{margin-bottom:10px;color:var(--muted)}
@media (max-width:820px){.board-wall{columns:2}}
@media (max-width:600px){.board-wall{columns:1}}
/* Accessible click targets */
.pill-link,.mini-pill,.search-presets a{min-height:44px}
.footer-grid a,.footer-bottom a{display:inline-flex;align-items:center;min-height:44px}
.folder-row .arrow,.rank-row .rank-link{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px}
.badge-slot{width:72px;aspect-ratio:1;border-radius:18px;margin-top:16px}