:root{--brand:#4d6fff;--brand-2:#6b54e9;--ink:#292f35;--muted:#657084;--line:#e8ebf1;--soft:#f7f9fc;--max:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scrollbar-gutter:stable}body{margin:0;color:var(--ink);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit}.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.site-header{height:80px;border-bottom:1px solid var(--line);background:#fff}.header-inner{height:100%;display:flex;align-items:center;gap:32px}.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--brand);font-size:22px;font-weight:900}.logo-mark{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#fff;background:var(--brand);font-size:22px}.nav{display:flex;align-items:center;gap:8px;margin-left:auto}.nav a{padding:10px 12px;text-decoration:none;font-weight:700;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand)}
.nav a[lang]{display:inline-flex;align-items:center;gap:7px;margin-left:6px;padding:9px 15px;border:1px solid #cbd5ff;border-radius:999px;color:var(--brand);background:#f3f5ff;box-shadow:0 4px 12px rgba(77,111,255,.12);transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease}
.nav a[lang]::before{content:"\1F310";font-size:15px;line-height:1}
.nav a[lang]:hover{color:#fff;background:var(--brand);border-color:var(--brand);transform:translateY(-1px)}
.header-language-switch{display:none;align-items:center;gap:6px;padding:9px 13px;border:1px solid #cbd5ff;border-radius:999px;color:var(--brand);background:#f3f5ff;font-size:14px;font-weight:800;text-decoration:none;white-space:nowrap}
.product-hero{min-height:535px;display:grid;place-items:center;text-align:center;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));position:relative;overflow:hidden}.product-hero:after{content:"";position:absolute;inset:-30% -20% -30% 60%;background:rgba(255,255,255,.08);transform:rotate(42deg)}.hero-content{position:relative;z-index:1;max-width:1050px;padding:80px 0}.product-hero h1{margin:0;font-size:52px}.product-hero p{margin:24px auto 0;font-size:20px;line-height:1.9}.hero-note{font-size:18px!important}.buttons{display:flex;justify-content:center;gap:14px;margin-top:34px}.button{min-height:52px;padding:0 26px;border:2px solid #fff;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--brand);text-decoration:none;font-weight:850}.button.secondary{background:rgba(255,255,255,.2);color:#fff;border-color:transparent}
.feature-section{min-height:650px;padding:72px 0;border-bottom:1px solid var(--line)}.feature-section h2,.more-features h2{text-align:center;margin:0 0 60px;font-size:38px}.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.feature-row.reverse .feature-copy{order:2}.feature-row.reverse .media-placeholder,.feature-row.reverse .product-shot{order:1}.feature-copy{font-size:17px;line-height:2}.feature-copy p{margin:0 0 20px}.media-placeholder{aspect-ratio:16/10;border:2px dashed #cbd5e1;border-radius:12px;background:linear-gradient(135deg,#f8fafc,#eef3fb);display:grid;place-items:center;text-align:center;color:#8290a5}.media-placeholder strong{display:block;color:#627086;font-size:16px}.media-placeholder code{display:block;margin-top:8px;color:#8c98a8;font-size:12px}.product-shot{overflow:hidden;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 18px 42px rgba(15,23,42,.12)}.product-shot img{width:100%;height:auto;display:block}
.more-features{padding:85px 0}.feature-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.mini-card{min-height:260px;padding:36px 28px;border-radius:12px;background:var(--soft);box-shadow:0 9px 26px rgba(15,23,42,.06);text-align:center;text-decoration:none;transition:transform .2s ease,box-shadow .2s ease}.mini-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(15,23,42,.11)}.mini-icon{width:54px;height:54px;margin:0 auto 24px;border-radius:14px;display:grid;place-items:center;color:#fff;background:var(--brand);font-size:24px;font-weight:900}.mini-card h3{font-size:21px}.mini-card p{color:#4f5b6d;line-height:1.8}
.download-cta{min-height:520px;display:grid;place-items:center;padding:80px 0;color:#fff;text-align:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));position:relative;overflow:hidden}.download-cta:before{content:"";position:absolute;width:430px;height:430px;right:-180px;top:-210px;border:70px solid rgba(255,255,255,.06);border-radius:50%}.download-cta-inner{position:relative;z-index:1}.download-cta h2{margin:0;font-size:38px}.download-cta p{max-width:680px;margin:24px auto 0;font-size:17px;line-height:1.9}.download-cta .button{margin-top:35px;border:0;background:rgba(74,126,255,.95);color:#fff;box-shadow:0 10px 24px rgba(30,52,150,.28)}
.simple-hero{padding:100px 0;text-align:center;background:linear-gradient(135deg,#f3f6ff,#f7f4ff)}.simple-hero h1{margin:0;font-size:48px}.simple-hero p{max-width:780px;margin:20px auto 0;color:var(--muted);font-size:18px;line-height:1.9}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:70px 0}.product-card{padding:30px;border:1px solid var(--line);border-radius:15px;text-decoration:none}.product-card h2{font-size:23px}.product-card p{color:var(--muted);line-height:1.75}.site-footer{padding:36px 0;border-top:1px solid var(--line);color:#8a94a5;text-align:center;font-size:13px}
.about-hero{padding:104px 0 92px;background:linear-gradient(135deg,#eef4ff,#f8fbff);text-align:center}.about-hero-inner{max-width:900px}.about-hero h1{margin:0;font-size:48px;line-height:1.25}.about-hero p{margin:24px auto 0;color:#4d596a;font-size:18px;line-height:1.9}.about-section{padding:86px 0}.about-section-soft{background:var(--soft)}.about-intro{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:54px;align-items:start}.about-intro h2,.about-seo-content h2{margin:0 0 18px;font-size:36px;line-height:1.25}.about-intro p,.about-seo-content p{margin:0 0 18px;color:#4c586a;font-size:17px;line-height:1.9}.about-snapshot{padding:28px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 12px 30px rgba(15,23,42,.07)}.about-snapshot strong{display:block;margin-bottom:16px;font-size:20px}.about-snapshot span{display:block;padding:12px 0;border-top:1px solid #eef1f6;color:#536077;font-weight:750}.about-capability-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.about-capability-card{min-height:250px;padding:28px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 12px 28px rgba(15,23,42,.06)}.about-capability-card h3{margin:0 0 13px;font-size:22px}.about-capability-card p{margin:0;color:#4f5b6d;line-height:1.82}.workflow-list{display:grid;gap:15px;max-width:940px;margin:0 auto;padding:0;list-style:none;counter-reset:workflow}.workflow-list li{counter-increment:workflow;display:grid;grid-template-columns:72px minmax(0,220px) minmax(0,1fr);gap:20px;align-items:center;padding:22px 26px;border:1px solid var(--line);border-radius:14px;background:#fff}.workflow-list li:before{content:counter(workflow,decimal-leading-zero);color:var(--brand);font-size:24px;font-weight:900}.workflow-list strong{font-size:19px}.workflow-list span{color:#536077;line-height:1.75}.about-seo-content{max-width:900px;text-align:center}.about-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:34px}.about-links a{padding:16px 18px;border:1px solid #cbd5ff;border-radius:10px;color:var(--brand);background:#fff;text-decoration:none;font-weight:850}.about-links a:hover{border-color:var(--brand);box-shadow:0 10px 24px rgba(77,111,255,.12)}
@media(max-width:900px){.site-header{height:auto}.header-inner{padding:14px 0;flex-wrap:wrap}.nav{width:100%;overflow:auto;margin:0}.product-hero h1,.simple-hero h1{font-size:38px}.product-hero p{font-size:17px}.feature-row,.feature-cards,.product-grid{grid-template-columns:1fr}.feature-row.reverse .feature-copy,.feature-row.reverse .media-placeholder,.feature-row.reverse .product-shot{order:initial}.feature-section{min-height:0}.feature-cards{gap:15px}.download-cta{min-height:430px}.download-cta h2{font-size:31px}}
.nav-toggle{display:none;width:48px;height:48px;margin-left:auto;padding:0;border:0;background:transparent;cursor:pointer;overflow:visible}
.nav-toggle span{position:absolute;left:10px;width:28px;height:4px;margin:0;padding:0;border:0;border-radius:4px;background:var(--ink);transition:transform .2s ease,opacity .2s ease}
.nav-toggle span:nth-child(1){top:12px}
.nav-toggle span:nth-child(2){top:22px}
.nav-toggle span:nth-child(3){top:32px}
@media(max-width:1100px){
  .site-header{height:78px;position:relative;z-index:100}
  .header-inner{height:78px;padding:0;flex-wrap:nowrap}
  .header-language-switch{display:inline-flex;margin-left:auto}
  .nav-toggle{display:block!important;flex:0 0 48px;margin-left:auto!important;position:relative;z-index:102}
  .nav-toggle span{display:block!important;left:10px!important;width:28px!important;height:4px!important;margin:0!important;padding:0!important;background:var(--ink)!important;border:0!important}
  .nav{display:none!important;position:absolute!important;top:78px!important;left:0!important;right:0!important;width:100%!important;max-height:calc(100vh - 78px);margin:0!important;padding:12px 24px 20px!important;overflow-y:auto;background:#fff!important;border-top:1px solid var(--line);box-shadow:0 12px 22px rgba(15,23,42,.12)}
  .nav.is-open{display:flex!important;flex-direction:column!important;align-items:stretch!important;gap:2px!important}
  .nav a{padding:13px 8px;border-bottom:1px solid #f0f2f6}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(10px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-10px) rotate(-45deg)}
}

@media(max-width:620px){
  .header-inner{gap:10px}
  .header-language-switch{padding:8px 10px;font-size:13px}
  .nav-toggle{margin-left:0!important}
}

.site-header{position:sticky;top:0;z-index:100;box-shadow:0 3px 12px rgba(15,23,42,.08)}
.feature-section{min-height:0;padding:84px 0}
.feature-section .container{width:min(1460px,calc(100% - 36px))}
.feature-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px}
.feature-copy,.product-shot{min-width:0}
.feature-copy{max-width:560px;font-size:18px;line-height:1.9}
.feature-copy p:last-child{margin-bottom:0}
.product-shot{aspect-ratio:16/9;display:grid;place-items:center}
.product-shot img{width:100%;height:100%;max-height:none;object-fit:contain;background:#f6f8fc}

@media(max-width:1100px){
  .site-header{position:sticky;top:0}
  .feature-row{grid-template-columns:1fr;gap:34px}
  .feature-row.reverse .feature-copy,.feature-row.reverse .media-placeholder,.feature-row.reverse .product-shot{order:initial}
  .feature-copy{max-width:760px}
  .product-shot img{max-height:none}
  .about-intro,.about-capability-grid{grid-template-columns:1fr}
  .about-snapshot{max-width:620px}
  .about-links{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:620px){
  .feature-section{padding:58px 0}
  .feature-section h2,.more-features h2{margin-bottom:34px;font-size:30px;line-height:1.25}
  .feature-copy{font-size:16px;line-height:1.8}
  .buttons{flex-direction:column;align-items:center}
  .button{width:min(100%,260px)}
  .about-hero{padding:64px 0 58px}
  .about-hero h1{font-size:34px}
  .about-hero p{font-size:16px;line-height:1.8}
  .about-section{padding:58px 0}
  .about-intro{gap:30px}
  .about-intro h2,.about-seo-content h2{font-size:29px}
  .about-capability-grid{gap:16px}
  .about-capability-card{min-height:0;padding:24px 22px}
  .workflow-list li{grid-template-columns:1fr;gap:8px;padding:22px}
  .workflow-list li:before{font-size:20px}
  .about-links{grid-template-columns:1fr}
}

/* IPA similarity product page */
.similarity-overview,.analysis-section,.platform-section{padding:96px 0}
.analysis-section{background:#f5f7fb}
.section-heading{max-width:820px;margin:0 auto 54px;text-align:center}
.section-heading>span{display:inline-block;margin-bottom:12px;color:var(--brand);font-size:14px;font-weight:850;letter-spacing:.08em}
.section-heading h2{margin:0;font-size:40px;line-height:1.25}
.section-heading p{margin:20px 0 0;color:var(--muted);font-size:17px;line-height:1.9}
.showcase-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.showcase-card{overflow:hidden;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 16px 42px rgba(15,23,42,.08)}
.showcase-card-wide{grid-column:1/-1}
.showcase-copy{padding:34px 36px 24px}
.step-label{color:var(--brand);font-size:13px;font-weight:850;letter-spacing:.06em}
.showcase-copy h3{margin:10px 0 12px;font-size:27px}
.showcase-copy p{margin:0;color:var(--muted);line-height:1.8}
.showcase-card figure,.analysis-card{margin:0}
.showcase-card img{display:block;width:100%;height:auto;border-top:1px solid var(--line);background:#f6f8fc}
.showcase-card figcaption{padding:14px 20px;color:#718096;background:#fafbfe;font-size:13px;text-align:center}
.analysis-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.analysis-card{overflow:hidden;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 14px 36px rgba(15,23,42,.07)}
.analysis-card-wide{grid-column:1/-1}
.analysis-card img{display:block;width:100%;height:auto;background:#f6f8fc}
.analysis-card figcaption{display:flex;gap:8px;flex-direction:column;padding:22px 24px;border-top:1px solid var(--line)}
.analysis-card figcaption strong{font-size:20px}
.analysis-card figcaption span{color:var(--muted);line-height:1.7}
.platform-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.platform-card{overflow:hidden;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 14px 36px rgba(15,23,42,.07)}
.platform-card>div{padding:28px 30px 22px}
.platform-card h3{margin:0 0 10px;font-size:23px}
.platform-card p{margin:0;color:var(--muted);line-height:1.75}
.platform-card img{display:block;width:100%;height:auto;border-top:1px solid var(--line);background:#f6f8fc}
@media(max-width:900px){.similarity-overview,.analysis-section,.platform-section{padding:70px 0}.section-heading h2{font-size:32px}.showcase-grid,.analysis-gallery,.platform-grid{grid-template-columns:1fr}.showcase-card-wide,.analysis-card-wide{grid-column:auto}}
@media(max-width:620px){.similarity-overview,.analysis-section,.platform-section{padding:54px 0}.section-heading{margin-bottom:34px}.section-heading h2{font-size:27px}.section-heading p{font-size:15px}.showcase-grid,.analysis-gallery,.platform-grid{gap:18px}.showcase-copy,.platform-card>div{padding:24px 22px 18px}.showcase-copy h3,.platform-card h3{font-size:21px}.analysis-card figcaption{padding:18px 20px}}
.similarity-feature:nth-of-type(even){background:#f7f9fd}
.similarity-feature .product-shot{aspect-ratio:16/9}
.similarity-feature .similarity-shot-wide{aspect-ratio:2/1}
.browser-feature:nth-of-type(even){background:#f7f9fd}
.browser-feature .product-shot{aspect-ratio:16/10}
.logo-mark{overflow:hidden;background:#fff;color:transparent}
.logo-mark img{width:100%;height:100%;display:block;object-fit:cover}

/* Tutorial center */
.tutorial-hero{padding:82px 0 72px;background:linear-gradient(135deg,#f0f4ff,#f8f5ff)}
.tutorial-hero-inner{max-width:850px;text-align:center}
.eyebrow{display:inline-block;margin-bottom:14px;color:var(--brand);font-size:14px;font-weight:850;letter-spacing:.08em;text-transform:uppercase}
.tutorial-hero h1{margin:0;font-size:46px;line-height:1.2}
.tutorial-hero p{margin:20px auto 0;color:var(--muted);font-size:18px;line-height:1.85}
.tutorial-section{padding:78px 0}
.tutorial-section.alt{background:var(--soft)}
.tutorial-section-head{max-width:760px;margin-bottom:38px}
.tutorial-section-head h2{margin:0;font-size:34px}
.tutorial-section-head p{margin:14px 0 0;color:var(--muted);line-height:1.8}
.tutorial-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.tutorial-card{display:flex;flex-direction:column;min-height:260px;padding:28px;border:1px solid var(--line);border-radius:16px;background:#fff;text-decoration:none;box-shadow:0 10px 30px rgba(15,23,42,.05);transition:transform .2s ease,box-shadow .2s ease}
.tutorial-card:hover{transform:translateY(-4px);box-shadow:0 15px 36px rgba(15,23,42,.1)}
.tutorial-card .card-label{color:var(--brand);font-size:13px;font-weight:850}
.tutorial-card h2,.tutorial-card h3{margin:13px 0 12px;font-size:22px;line-height:1.45}
.tutorial-card p{margin:0 0 20px;color:var(--muted);line-height:1.75}
.tutorial-card .read-more{margin-top:auto;color:var(--brand);font-weight:800}
.article-shell{padding:34px 0 90px;background:#fff}
.breadcrumbs{margin-bottom:34px;color:#7b8494;font-size:14px}
.breadcrumbs a{text-decoration:none;color:var(--brand)}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:64px;align-items:start}
.article-content h1{margin:0;font-size:42px;line-height:1.25}
.article-lead{margin:20px 0 14px;color:#4f5b6d;font-size:19px;line-height:1.85}
.article-meta{padding-bottom:28px;border-bottom:1px solid var(--line);color:#8a94a5;font-size:14px}
.article-content h2{margin:42px 0 14px;font-size:28px;scroll-margin-top:110px}
.article-content h3{margin:28px 0 10px;font-size:21px}
.article-content p,.article-content li{color:#4c586a;font-size:17px;line-height:1.9}
.article-content ol,.article-content ul{padding-left:24px}
.article-note{margin:28px 0;padding:20px 22px;border-left:4px solid var(--brand);border-radius:0 10px 10px 0;background:#f2f5ff;color:#43506a;line-height:1.8}
.article-sidebar{position:sticky;top:110px;padding:24px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}
.article-sidebar strong{display:block;margin-bottom:13px}
.article-sidebar a{display:block;padding:8px 0;color:#536077;text-decoration:none;line-height:1.5}
.article-sidebar a:hover{color:var(--brand)}
.related-guides{margin-top:50px;padding-top:32px;border-top:1px solid var(--line)}
.related-guides h2{margin-top:0}
.related-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.related-links a{padding:18px;border:1px solid var(--line);border-radius:10px;text-decoration:none;font-weight:750}
.related-links a:hover{border-color:#b9c5ff;color:var(--brand)}
@media(max-width:900px){.tutorial-grid{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:1fr}.article-sidebar{position:static;order:-1}.article-content h1{font-size:36px}}
@media(max-width:620px){.tutorial-hero{padding:58px 0 52px}.tutorial-hero h1{font-size:34px}.tutorial-hero p{font-size:16px}.tutorial-section{padding:54px 0}.tutorial-grid,.related-links{grid-template-columns:1fr}.tutorial-section-head h2{font-size:28px}.article-shell{padding-top:24px}.article-content h1{font-size:31px}.article-lead{font-size:17px}.article-content p,.article-content li{font-size:16px}}