:root{
  --brand:#5B4BDB;--brand-soft:#8B7CF6;--ink:#1E1B2E;--text:#292734;--muted:#6F6B7A;--bg:#F7F7FB;--surface:#fff;--soft:#EFEFFC;--accent:#F05A7E;--line:#E1E0EA;--shadow:0 18px 50px rgba(39,34,75,.10);--radius:24px;--radius-sm:16px;--max:1180px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px}.skip-link:focus{top:16px}.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,247,251,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(225,224,234,.78)}.header-shell{width:min(calc(100% - 40px),var(--max));min-height:78px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px}.brand img{width:46px;height:46px;object-fit:contain;border-radius:12px}.brand span{display:flex;flex-direction:column;line-height:1.2}.brand strong{font-size:1.18rem;color:var(--ink)}.brand small{margin-top:5px;color:var(--muted);font-size:.75rem}.main-nav{display:flex;align-items:center;gap:8px}.main-nav a{padding:10px 14px;border-radius:999px;color:var(--muted);font-weight:700;font-size:.94rem}.main-nav a:hover,.main-nav a:focus-visible,.main-nav a.is-active{background:var(--soft);color:var(--brand)}.menu-toggle{display:none;width:44px;height:44px;border:0;border-radius:12px;background:var(--soft);align-items:center;justify-content:center;flex-direction:column;gap:5px}.menu-toggle span{width:20px;height:2px;background:var(--ink);border-radius:4px}.hero{width:min(calc(100% - 40px),var(--max));margin:42px auto 0;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;min-height:610px}.hero__copy{padding:42px 0}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:22px;height:2px;background:currentColor;border-radius:3px}.hero h1,.page-hero h1,.article-header h1,.not-found h1{margin:16px 0 20px;color:var(--ink);font-size:clamp(2.45rem,5vw,5.15rem);line-height:1.05;letter-spacing:-.045em}.hero h1{max-width:760px}.lead{font-size:clamp(1.05rem,1.8vw,1.27rem);color:var(--muted);max-width:760px}.hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:14px;font-weight:800;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}.button:hover{transform:translateY(-2px)}.button--primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(91,75,219,.24)}.button--ghost{border:1px solid var(--line);background:#fff;color:var(--ink)}.button--soft{background:var(--soft);color:var(--brand)}.button--light{background:#fff;color:var(--brand)}.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}.trust-row span,.topic-chips span{padding:8px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);background:rgba(255,255,255,.58);font-size:.84rem}.hero__visual{margin:0;padding:20px;background:linear-gradient(145deg,#fff,var(--soft));border-radius:34px;box-shadow:var(--shadow);position:relative}.hero__visual:after{content:"";position:absolute;inset:auto 28px -20px 28px;height:54px;background:rgba(91,75,219,.12);filter:blur(28px);border-radius:50%}.hero__visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:24px}.section{padding:92px 0}.section--tinted{background:var(--soft)}.section--deep{background:var(--ink);color:#fff}.section-heading{margin-bottom:32px}.section-heading.narrow{max-width:760px}.section-heading h2,.split-feature h2,.stream-intro h2,.index-group h2,.prose-main h2,.article-next h2,.article-aside h2,.side-panel h2,.app-checks h2{margin:8px 0 12px;color:var(--ink);font-size:clamp(1.75rem,3vw,2.8rem);line-height:1.15;letter-spacing:-.025em}.section-heading p,.stream-intro p,.index-group__heading p{color:var(--muted)}.row-heading{display:flex;align-items:end;justify-content:space-between;gap:30px}.path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.path-card{min-height:300px;padding:28px;border-radius:26px;border:1px solid var(--line);background:#fff;display:flex;flex-direction:column;position:relative;overflow:hidden;transition:.25s ease}.path-card:before{content:"";position:absolute;width:160px;height:160px;border-radius:50%;right:-70px;top:-80px;background:var(--soft)}.path-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}.path-card>span{color:var(--brand);font-weight:900;font-size:.8rem}.path-card h3{margin:44px 0 10px;color:var(--ink);font-size:1.45rem}.path-card p{color:var(--muted);margin:0 0 auto}.path-card strong{margin-top:28px;color:var(--brand)}.path-card--core{background:var(--brand);border-color:var(--brand);color:#fff}.path-card--core:before{background:rgba(255,255,255,.12)}.path-card--core>span,.path-card--core h3,.path-card--core p,.path-card--core strong{color:#fff}.path-card--video{background:#fff6f8}.split-feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:70px}.split-feature--reverse figure{order:2}.split-feature figure{margin:0}.split-feature img{border-radius:30px;box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:cover}.split-feature p{color:var(--muted);font-size:1.05rem}.check-list{list-style:none;padding:0;margin:25px 0}.check-list li{position:relative;padding-left:32px;margin:12px 0}.check-list li:before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:.72rem;font-weight:900}.text-link{color:var(--brand);font-weight:800}.text-link:hover{text-decoration:underline}.text-link--strong{display:inline-flex;margin-top:10px}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.article-grid--two{grid-template-columns:repeat(2,1fr)}.article-grid--compact{grid-template-columns:repeat(3,1fr)}.story-card{padding:26px;border:1px solid var(--line);border-radius:22px;background:#fff;min-height:270px;display:flex;flex-direction:column}.story-card__meta{font-size:.76rem;color:var(--brand);font-weight:800}.story-card h3{margin:18px 0 12px;font-size:1.18rem;line-height:1.4;color:var(--ink)}.story-card h3 a:hover{color:var(--brand)}.story-card p{margin:0 0 24px;color:var(--muted);font-size:.94rem}.story-card .text-link{margin-top:auto;font-size:.88rem}.faq-preview{display:flex;flex-direction:column;align-items:flex-start}.faq-list{width:100%;display:grid;gap:12px;margin:10px 0 28px}.faq-list details{border:1px solid var(--line);border-radius:16px;background:#fff;padding:4px 18px}.faq-list summary{list-style:none;cursor:pointer;padding:17px 32px 17px 0;font-weight:800;color:var(--ink);position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:0;top:13px;font-size:1.4rem;color:var(--brand)}.faq-list details[open] summary:after{content:"−"}.faq-list p{margin:0;padding:0 0 18px;color:var(--muted)}.breadcrumb{width:min(calc(100% - 40px),var(--max));margin:24px auto 0}.breadcrumb ol{display:flex;flex-wrap:wrap;list-style:none;padding:0;margin:0;gap:8px;font-size:.82rem;color:var(--muted)}.breadcrumb li:not(:last-child):after{content:"/";margin-left:8px;color:#aaa6b5}.breadcrumb a:hover{color:var(--brand)}.page-hero{padding:64px 0 36px;display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}.page-hero h1{font-size:clamp(2.35rem,5vw,4.7rem)}.page-hero figure{margin:0}.page-hero figure img{border-radius:30px;box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:cover}.page-hero--official figure img{background:var(--soft)}.page-hero--yiqicao figure img{border-radius:50% 18px 50% 18px}.topic-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}.prose-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:50px;align-items:start}.prose-main>p{font-size:1.03rem;color:#484451}.prose-main a{color:var(--brand);font-weight:700}.prose-main h2{margin-top:56px;font-size:2rem}.numbered-points{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}.numbered-points>div{padding:22px;background:#fff;border:1px solid var(--line);border-radius:18px}.numbered-points b{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--soft);color:var(--brand)}.numbered-points h3{font-size:1.03rem;margin:16px 0 8px;color:var(--ink)}.numbered-points p{font-size:.9rem;color:var(--muted);margin:0}.side-panel{position:sticky;top:108px;padding:22px;border-radius:22px;background:#fff;border:1px solid var(--line)}.side-panel h2{font-size:1.18rem;margin:0 0 12px}.side-panel a{display:flex;flex-direction:column;gap:3px;padding:14px 0;border-top:1px solid var(--line)}.side-panel strong{color:var(--ink)}.side-panel span{font-size:.82rem;color:var(--muted)}.story-stream{max-width:980px}.stream-intro{max-width:720px;margin-bottom:28px}.stream-item{display:grid;grid-template-columns:64px minmax(0,1fr);gap:22px;padding:34px 0;border-top:1px solid var(--line);align-items:start}.stream-item:has(figure){grid-template-columns:64px minmax(0,1fr) 280px}.stream-index{font-size:.8rem;font-weight:900;color:var(--brand);padding-top:5px}.stream-item h2{font-size:1.5rem;margin:6px 0 10px;color:var(--ink)}.stream-item h2 a:hover{color:var(--brand)}.stream-item p{color:var(--muted);margin-top:0}.stream-item figure{margin:0}.stream-item figure img{border-radius:18px;aspect-ratio:4/3;object-fit:cover}.callout{display:flex;align-items:center;justify-content:space-between;gap:40px}.callout h2{color:#fff;font-size:clamp(1.8rem,3vw,2.9rem);margin:8px 0}.callout p{max-width:760px;color:#cbc7d9}.callout .eyebrow{color:#c9c1ff}.video-index{padding-top:38px}.index-group{padding:48px 0;border-top:1px solid var(--line)}.index-group:first-child{border-top:0}.index-group__heading{display:grid;grid-template-columns:60px minmax(0,1fr);gap:18px;margin-bottom:26px}.index-group__heading>span{color:var(--brand);font-weight:900}.index-group__heading h2{margin:0 0 8px;font-size:1.9rem}.index-group__heading p{margin:0;max-width:760px}.media-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-top:20px}.media-strip figure{margin:0}.media-strip img{width:100%;border-radius:20px;aspect-ratio:4/3;object-fit:cover}.app-checks{padding-top:44px}.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.check-grid article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px}.check-grid b{color:var(--accent);font-size:.8rem}.check-grid h3{color:var(--ink);font-size:1.2rem;margin:20px 0 9px}.check-grid p{color:var(--muted);margin:0}.faq-page{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:45px;align-items:start}.faq-list--large details{padding:8px 22px}.faq-list--large summary{font-size:1.05rem;padding-top:20px;padding-bottom:20px}.article-page{padding:64px 0 100px}.article-header{max-width:900px;margin:0 auto 46px;text-align:center}.article-header .eyebrow:before{display:none}.article-header h1{font-size:clamp(2.25rem,5vw,4.6rem)}.article-header .lead{margin-inline:auto}.article-body{display:grid;grid-template-columns:minmax(0,760px) 280px;justify-content:center;gap:60px;align-items:start}.article-content{font-size:1.06rem}.article-content>p{margin:0 0 22px;color:#46424f}.article-content>p:first-child:first-letter{font-size:3.2rem;line-height:.8;float:left;margin:9px 8px 0 0;color:var(--brand);font-weight:900}.article-content h2{margin:48px 0 14px;color:var(--ink);font-size:1.65rem}.article-aside{position:sticky;top:108px}.article-aside img{border-radius:18px;margin-bottom:22px}.article-aside h2{font-size:1.05rem}.article-aside a{display:block;padding:10px 0;border-top:1px solid var(--line);font-size:.9rem;color:var(--muted)}.article-aside a:hover{color:var(--brand)}.article-next{margin-top:50px;padding:28px;border-radius:22px;background:var(--soft)}.article-next h2{margin-top:0}.article-next p{color:var(--muted)}.article-next>div{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.not-found{min-height:72vh;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.error-code{font-size:clamp(4rem,14vw,10rem);line-height:.8;font-weight:950;color:var(--soft);text-shadow:0 1px 0 #d9d6f8}.not-found h1{font-size:clamp(2rem,4vw,4rem);margin-bottom:10px}.not-found p{color:var(--muted);font-size:1.08rem}.site-footer{background:#171522;color:#fff;padding:54px 0}.footer-shell{width:min(calc(100% - 40px),var(--max));margin:auto;display:flex;justify-content:space-between;gap:30px}.footer-shell strong{font-size:1.3rem}.footer-shell p{color:#aaa6b8;max-width:520px}.footer-shell nav{display:flex;flex-wrap:wrap;gap:14px 20px;align-content:start;justify-content:flex-end}.footer-shell nav a{color:#cbc8d5;font-size:.88rem}.footer-shell nav a:hover{color:#fff}.back-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border:0;border-radius:50%;background:var(--brand);color:#fff;box-shadow:0 10px 25px rgba(91,75,219,.3);opacity:0;pointer-events:none;transform:translateY(12px);transition:.2s ease}.back-top.is-visible{opacity:1;pointer-events:auto;transform:none}:focus-visible{outline:3px solid rgba(240,90,126,.45);outline-offset:3px}
@media(max-width:980px){.hero{grid-template-columns:1fr;min-height:auto;margin-top:18px}.hero__copy{padding-bottom:0}.hero__visual{max-width:760px}.path-grid{grid-template-columns:1fr 1fr}.path-card:last-child{grid-column:1/-1}.split-feature{gap:36px}.article-grid,.article-grid--compact{grid-template-columns:1fr 1fr}.prose-layout,.faq-page{grid-template-columns:1fr}.side-panel{position:static;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.side-panel h2{grid-column:1/-1}.side-panel a{border:1px solid var(--line);padding:14px;border-radius:14px}.numbered-points{grid-template-columns:1fr}.article-body{grid-template-columns:minmax(0,1fr) 230px;gap:34px}}
@media(max-width:820px){.header-shell{min-height:70px}.menu-toggle{display:flex}.main-nav{display:none;position:absolute;left:20px;right:20px;top:76px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.is-open{display:flex}.main-nav a{padding:13px 14px}.brand small{display:none}.page-hero,.split-feature{grid-template-columns:1fr}.page-hero figure{max-width:680px}.split-feature--reverse figure{order:0}.stream-item,.stream-item:has(figure){grid-template-columns:48px minmax(0,1fr)}.stream-item figure{grid-column:2}.callout{align-items:flex-start;flex-direction:column}.article-body{grid-template-columns:1fr}.article-aside{position:static;display:grid;grid-template-columns:1fr 1fr;gap:8px}.article-aside img,.article-aside h2{grid-column:1/-1}.article-aside a{border:1px solid var(--line);padding:10px;border-radius:10px}.row-heading{align-items:flex-start;flex-direction:column}.check-grid{grid-template-columns:1fr}.media-strip{grid-template-columns:1fr 1fr}.footer-shell{flex-direction:column}.footer-shell nav{justify-content:flex-start}}
@media(max-width:620px){.shell,.header-shell,.breadcrumb,.hero{width:min(calc(100% - 28px),var(--max))}.section{padding:66px 0}.hero h1,.page-hero h1,.article-header h1{letter-spacing:-.035em}.hero__visual{padding:10px;border-radius:24px}.hero__visual img{border-radius:18px}.path-grid,.article-grid,.article-grid--two,.article-grid--compact{grid-template-columns:1fr}.path-card:last-child{grid-column:auto}.path-card{min-height:250px}.split-feature{gap:28px}.side-panel{grid-template-columns:1fr}.page-hero{padding-top:42px;gap:28px}.stream-item,.stream-item:has(figure){grid-template-columns:1fr;gap:8px}.stream-item figure{grid-column:auto}.stream-index{padding-top:0}.index-group__heading{grid-template-columns:1fr;gap:6px}.media-strip{grid-template-columns:1fr}.article-page{padding-top:44px}.article-header{text-align:left}.article-header .eyebrow:before{display:block}.article-aside{grid-template-columns:1fr}.article-aside img,.article-aside h2{grid-column:auto}.footer-shell nav{display:grid;grid-template-columns:1fr 1fr}.back-top{right:14px;bottom:14px}.hero__actions .button{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.back-top{transition:none}}
.guide-toc{padding-top:42px}.guide-links{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.guide-links a{display:flex;flex-direction:column;gap:6px;padding:22px;border:1px solid var(--line);border-radius:20px;background:#fff;min-height:140px}.guide-links a:hover{border-color:rgba(91,75,219,.35);box-shadow:var(--shadow);transform:translateY(-2px)}.guide-links strong{color:var(--ink);font-size:1.02rem}.guide-links span{color:var(--muted);font-size:.86rem}.guide-section{scroll-margin-top:96px}.guide-section__intro{max-width:760px;margin-bottom:30px}.guide-section__intro h2{margin:8px 0 12px;color:var(--ink);font-size:clamp(1.8rem,3vw,2.7rem);line-height:1.15}.guide-section__intro p{color:var(--muted)}.page-hero--guide figure img{background:linear-gradient(145deg,#fff,#efeefc)}
@media(max-width:900px){.guide-links{grid-template-columns:1fr 1fr}}@media(max-width:560px){.guide-links{grid-template-columns:1fr}.guide-links a{min-height:auto}}
.privacy-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.privacy-grid article{padding:30px;border:1px solid var(--line);border-radius:24px;background:#fff}.privacy-grid article>span{color:var(--accent);font-size:.8rem;font-weight:900}.privacy-grid h2{margin:14px 0 10px;color:var(--ink);font-size:1.35rem;line-height:1.3}.privacy-grid p{color:var(--muted);margin:10px 0 0}.page-hero--privacy figure img{background:var(--soft)}@media(max-width:720px){.privacy-grid{grid-template-columns:1fr}}