:root{
      --ink:#10234d;--muted:#64718b;--line:#e6ebf5;--soft:#f6f8fd;
      --blue:#2d63f5;--blue2:#5d55e8;--cyan:#10a8b7;--green:#13a673;
      --white:#fff;--shadow:0 20px 55px rgba(31,63,133,.11);--radius:22px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--ink);background:#fff;line-height:1.72;overflow-x:hidden}
    a{text-decoration:none;color:inherit} button,input{font:inherit} img,svg{max-width:100%;display:block}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.skip-link{position:fixed;left:16px;top:-70px;z-index:3000;background:#fff;color:var(--blue);padding:10px 14px;border-radius:10px;box-shadow:var(--shadow);font-weight:800}.skip-link:focus{top:16px}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .section{padding:92px 0}.section.soft{background:var(--soft)}
    h1,h2,h3,p{margin-top:0} h1{font-size:clamp(42px,4.8vw,62px);line-height:1.08;letter-spacing:-.045em;margin-bottom:22px}
    h2{font-size:clamp(30px,3.8vw,44px);line-height:1.2;letter-spacing:-.025em;margin:14px 0 16px}
    h3{font-size:20px;line-height:1.35;margin-bottom:9px}.muted{color:var(--muted)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#edf2ff;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.04em}
    .eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 0 0 5px rgba(45,99,245,.1)}
    .section-head{max-width:760px;margin:0 auto 48px;text-align:center}.section-head p{font-size:17px;color:var(--muted)}
    .gradient{background:linear-gradient(105deg,var(--blue),var(--blue2) 55%,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:0 22px;border-radius:14px;border:1px solid transparent;font-weight:800;cursor:pointer;transition:.2s}
    .btn:hover{transform:translateY(-2px)}.btn.primary{background:linear-gradient(110deg,var(--blue),var(--blue2));color:#fff;box-shadow:0 12px 26px rgba(62,86,237,.24)}
    .btn.secondary{background:#fff;border-color:#dce3f1;color:var(--ink)}.btn.small{min-height:42px;padding:0 16px;font-size:14px}

    /* nav */
    .nav-wrap{position:fixed;top:0;left:0;right:0;z-index:1000;padding:12px 0;transition:.2s}.nav-wrap.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(225,231,242,.9);box-shadow:0 8px 30px rgba(29,55,112,.07)}
    .nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:54px}.brand{justify-self:start;display:inline-flex;align-items:center;min-width:154px}.brand-logo{width:154px;height:48px;object-fit:contain;object-position:left center}
    .nav-links{justify-self:center;display:flex;align-items:center;gap:27px;font-size:14px;font-weight:750;color:#45516a;white-space:nowrap}.nav-links a{position:relative;padding:10px 0}.nav-links a::after{content:"";position:absolute;left:50%;right:50%;bottom:4px;height:2px;border-radius:2px;background:var(--blue);transition:.2s}.nav-links a:hover{color:var(--blue)}.nav-links a:hover::after{left:0;right:0}
    .nav-actions{justify-self:end;display:flex;align-items:center;gap:10px}.menu{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer}

    /* hero */
    .hero{position:relative;overflow:hidden;padding:166px 0 90px;background:radial-gradient(circle at 8% 15%,rgba(45,99,245,.13),transparent 27%),radial-gradient(circle at 88% 15%,rgba(93,85,232,.14),transparent 26%),linear-gradient(180deg,#f9fbff 0,#fff 82%)}
    .hero::before{content:"";position:absolute;width:500px;height:500px;border-radius:50%;right:-220px;top:90px;border:1px solid rgba(59,87,210,.08);box-shadow:0 0 0 75px rgba(59,87,210,.022),0 0 0 150px rgba(59,87,210,.014)}
    .hero-grid{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:56px;align-items:center}.hero-copy p{font-size:18px;color:var(--muted);max-width:640px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:31px 0 24px}
    .hero-points{display:flex;gap:18px;flex-wrap:wrap;color:#516078;font-size:13px}.hero-points span{display:flex;align-items:center;gap:7px}.hero-points i{width:18px;height:18px;border-radius:50%;display:grid;place-items:center;background:#e9f8f2;color:var(--green);font-style:normal;font-weight:900}
    .dashboard{background:rgba(255,255,255,.94);border:1px solid rgba(220,228,242,.9);border-radius:28px;box-shadow:var(--shadow);padding:20px}
    .dash-head{display:flex;justify-content:space-between;align-items:center;padding:4px 3px 16px;border-bottom:1px solid var(--line)}.dash-title{font-weight:900}.dash-live{font-size:12px;color:var(--green);background:#eaf8f3;border-radius:999px;padding:5px 9px}
    .metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}.metric{padding:13px;border-radius:15px;background:#f7f9fd}.metric strong{display:block;font-size:24px}.metric small{color:#7b879c}
    .chart{height:160px;border-radius:17px;background:linear-gradient(180deg,#f6f8ff,#fff);position:relative;overflow:hidden;padding:18px}.chart-grid{position:absolute;inset:18px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,#e8edf6 32px)}
    .chart svg{position:absolute;inset:18px;width:calc(100% - 36px);height:calc(100% - 36px)}.platforms{display:flex;gap:7px;flex-wrap:wrap;margin-top:15px}.platforms span{font-size:11px;padding:5px 8px;background:#f3f6fb;border-radius:8px;color:#61708a}

    /* trust */
    .trust-strip{padding:26px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.trust-row{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.trust-row>strong{font-size:14px;color:#53627b}.trust-tags{display:flex;gap:9px;flex-wrap:wrap}.trust-tags span{padding:8px 12px;border:1px solid var(--line);border-radius:10px;color:#5f6d84;font-size:13px;background:#fff}

    /* product */
    .problem-grid{display:grid;grid-template-columns:.88fr 1.12fr;gap:58px;align-items:center}.problem-copy p{color:var(--muted);font-size:17px}.problem-list{display:grid;grid-template-rows:repeat(3,1fr);gap:13px}.problem-item{display:grid;grid-template-columns:48px 1fr;gap:15px;align-items:start;padding:19px;background:#fff;border:1px solid var(--line);border-radius:17px;min-height:112px}.num{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:#edf2ff;color:var(--blue);font-weight:900}
    .cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:stretch}.cap{padding:25px 22px;border:1px solid var(--line);border-radius:20px;background:#fff;transition:.2s;display:flex;flex-direction:column;min-height:228px}.cap:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,#edf2ff,#eefbfa);color:var(--blue);font-weight:900;margin-bottom:18px}.cap p{color:var(--muted);font-size:14px;margin:0;flex:1}
    .product-show{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}.screen{border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow);padding:18px}.screen-top{display:flex;gap:6px;padding-bottom:14px;border-bottom:1px solid var(--line)}.screen-top i{width:9px;height:9px;border-radius:50%;background:#dce3ef}.screen-body{display:grid;grid-template-columns:145px 1fr;min-height:360px}.screen-menu{padding:18px 12px;border-right:1px solid var(--line);display:grid;align-content:start;gap:9px}.screen-menu span{padding:9px 10px;border-radius:9px;font-size:12px;color:#66738b}.screen-menu span.active{background:#edf2ff;color:var(--blue);font-weight:800}.screen-main{padding:18px}.screen-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.mini{padding:12px;border-radius:12px;background:#f7f9fd}.mini strong{font-size:19px;display:block}.bar-chart{display:flex;gap:9px;align-items:flex-end;height:150px;margin-top:20px;padding:15px;border:1px solid var(--line);border-radius:15px}.bar-chart i{flex:1;background:linear-gradient(180deg,var(--blue),#9bb5ff);border-radius:6px 6px 2px 2px}
    .feature-side{display:grid;grid-template-rows:repeat(3,1fr);gap:13px}.feature-side .item{padding:20px;border-radius:18px;border:1px solid var(--line);background:#fff;display:flex;flex-direction:column;justify-content:center;min-height:110px}.feature-side p{font-size:14px;color:var(--muted);margin:0}

    /* flow/support */
    .flow-track{display:grid;grid-template-columns:minmax(0,1fr) 34px minmax(0,1fr) 34px minmax(0,1fr) 34px minmax(0,1fr) 34px minmax(0,1fr);align-items:stretch;gap:0}.step{padding:24px 19px;border:1px solid var(--line);border-radius:19px;background:#fff;min-height:176px;display:flex;flex-direction:column}.step-no{display:inline-flex;align-items:center;justify-content:center;width:40px;height:32px;border-radius:10px;background:#edf2ff;color:var(--blue);font-size:12px;font-weight:900;margin-bottom:18px}.step p{font-size:13px;color:var(--muted);margin:0;flex:1}.flow-connector{position:relative;display:flex;align-items:center;justify-content:center}.flow-connector::before{content:"";width:100%;height:2px;background:#cdd7e8}.flow-connector::after{content:"";position:absolute;right:3px;width:8px;height:8px;border-top:2px solid #9faec5;border-right:2px solid #9faec5;transform:rotate(45deg)}
    .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:stretch}.support{padding:29px;border-radius:22px;border:1px solid var(--line);background:#fff;display:flex;flex-direction:column;min-height:330px}.support.highlight{background:linear-gradient(145deg,#173a8c,#315ed3 58%,#4c55dc);color:#fff}.support.highlight p,.support.highlight li{color:#dfe7ff}.support ul{padding-left:20px;margin:16px 0 24px;color:var(--muted);flex:1}

    /* articles */
    .article-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:stretch}.knowledge-card{position:relative;display:flex;flex-direction:column;min-height:286px;padding:25px;border:1px solid var(--line);border-radius:20px;background:#fff;transition:.2s;overflow:hidden}.knowledge-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#ced9ef}.knowledge-card.featured{background:linear-gradient(145deg,#163578,#2e61d0 65%,#327eaa);color:#fff;border-color:transparent}.knowledge-card.featured::before{content:"GEO";position:absolute;right:-8px;top:-30px;font-size:112px;font-weight:950;color:rgba(255,255,255,.07)}.knowledge-tag{display:inline-flex;align-self:flex-start;padding:6px 9px;border-radius:8px;background:#edf2ff;color:var(--blue);font-size:11px;font-weight:900;margin-bottom:22px}.featured .knowledge-tag{background:rgba(255,255,255,.13);color:#fff}.knowledge-card h3{font-size:18px;margin-bottom:11px}.knowledge-card p{font-size:13px;color:var(--muted);margin:0 0 22px;flex:1}.featured p{color:#dfe8ff}.knowledge-link{font-size:13px;font-weight:850;color:var(--blue)}.featured .knowledge-link{color:#fff}.article-more{text-align:center;margin-top:30px}

    /* faq/cta/footer */
    .faq{max-width:900px;margin:auto;display:grid;gap:11px}.faq details{border:1px solid var(--line);border-radius:16px;background:#fff;padding:0 19px}.faq summary{list-style:none;cursor:pointer;font-weight:800;padding:18px 35px 18px 0;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";position:absolute;right:0;top:14px;font-size:25px;color:var(--blue)}.faq details[open] summary::after{content:"−"}.faq p{color:var(--muted);font-size:14px;padding-bottom:18px;margin:0}
    .cta{padding:78px 0}.cta-box{padding:52px;border-radius:28px;background:linear-gradient(135deg,#163578,#2e61d0 58%,#317caa);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px;overflow:hidden;position:relative}.cta-box p{color:#dfe8ff;max-width:700px;margin-bottom:0}.cta-box h2{margin-top:0}.cta-actions{display:flex;gap:10px;flex-wrap:wrap}.cta .secondary{border-color:rgba(255,255,255,.3)}
    footer{padding:50px 0 30px;background:#0d1d42;color:#c9d4ea}.footer-brand{display:inline-flex;background:#fff;border-radius:13px;padding:8px 12px;margin-bottom:14px}.footer-brand img{width:146px;height:auto}.footer-grid{display:grid;grid-template-columns:1.3fr .7fr .7fr .9fr;gap:30px}.footer-title{color:#fff;font-weight:900;margin-bottom:13px}.footer-links{display:grid;gap:8px;font-size:13px}.footer-links a:hover{color:#fff}.copyright{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#93a3c3;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

    /* modal */
    .modal{position:fixed;inset:0;z-index:1700;background:rgba(7,18,43,.56);display:none;align-items:center;justify-content:center;padding:20px}.modal.show{display:flex}.modal-card{width:min(470px,100%);background:#fff;border-radius:24px;padding:27px;box-shadow:0 24px 70px rgba(4,17,47,.3)}.modal-top{display:flex;justify-content:space-between;gap:20px}.close{border:0;background:var(--soft);width:36px;height:36px;border-radius:10px;font-size:21px}.field{display:grid;gap:6px;margin-top:14px}.field label{font-size:13px;font-weight:800}.field input{height:46px;border:1px solid #dbe2ef;border-radius:12px;padding:0 13px}.consent{display:flex;align-items:flex-start;gap:8px;font-size:12px;color:var(--muted);margin:14px 0}.consent input{margin-top:3px}.consent a{color:var(--blue);font-weight:700}.modal-actions{display:flex;gap:10px}.modal-actions .btn{flex:1}.success{display:none;padding:15px;border-radius:13px;background:#eaf8f3;color:#176847;text-align:center;margin-top:14px}

    @media(max-width:1080px){.nav-links{gap:18px}.nav-actions .secondary{display:none}.hero-grid{gap:36px}}
    @media(max-width:980px){.nav{display:flex;justify-content:space-between}.nav-links{display:none}.menu{display:block}.hero-grid,.problem-grid,.product-show{grid-template-columns:1fr}.hero{padding-top:140px}.hero-copy{text-align:center}.hero-copy p{margin-left:auto;margin-right:auto}.hero-actions,.hero-points{justify-content:center}.dashboard{max-width:650px;margin:auto}.cap-grid{grid-template-columns:1fr 1fr}.flow-track{grid-template-columns:1fr}.flow-connector{height:30px}.flow-connector::before{width:2px;height:100%}.flow-connector::after{right:auto;bottom:3px;width:8px;height:8px;transform:rotate(135deg)}.article-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.nav.open .nav-links{display:flex;position:absolute;top:68px;left:20px;right:20px;flex-direction:column;align-items:stretch;background:#fff;padding:17px;border-radius:16px;box-shadow:var(--shadow)}.nav.open .nav-links a{padding:9px 4px}}
    @media(max-width:680px){.container{width:min(100% - 26px,1180px)}.section{padding:70px 0}.nav-actions .primary{display:none}.metric-row,.screen-cards{grid-template-columns:1fr}.cap-grid,.support-grid,.article-grid,.footer-grid{grid-template-columns:1fr}.screen-body{grid-template-columns:1fr}.screen-menu{display:none}.cta-box{padding:32px 24px;display:block}.cta-actions{margin-top:22px}.brand-logo{width:132px;height:auto}.knowledge-card{min-height:240px}.modal-actions{flex-direction:column}}
    @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
  

    /* V4：百度SEO主题层级与板块标题布局优化 */
    h1{font-size:clamp(38px,4.35vw,56px);line-height:1.1;letter-spacing:-.038em;max-width:760px}
    .section-head{max-width:800px;margin:0 auto 44px;text-align:center}
    .section-head .eyebrow{
      display:flex;width:max-content;align-items:center;justify-content:center;
      gap:10px;margin:-9px auto 9px;padding:0;background:transparent;border-radius:0;
      color:var(--blue);font-size:12px;font-weight:900;letter-spacing:.14em;
    }
    .section-head .eyebrow::before,.section-head .eyebrow::after{
      content:"";display:block;width:26px;height:1px;border-radius:0;
      background:linear-gradient(90deg,rgba(45,99,245,.12),rgba(45,99,245,.82));
      box-shadow:none;
    }
    .section-head .eyebrow::after{background:linear-gradient(90deg,rgba(45,99,245,.82),rgba(45,99,245,.12))}
    .section-head h2{margin:0 0 14px}
    .section-head p{max-width:720px;margin:0 auto;font-size:16px;line-height:1.8}
    .screen-cards .mini{min-height:82px;display:flex;flex-direction:column;justify-content:center}
    .screen-cards .mini small{color:#728098}
    .screen-cards .mini strong{font-size:23px;line-height:1.2;margin-top:3px}
    @media(max-width:680px){
      h1{font-size:clamp(34px,10.5vw,46px)}
      .section-head{margin-bottom:36px}
      .section-head .eyebrow{margin-top:-5px}
    }

/* Z-Blog theme additions */
.site-main{background:#fff}.article-hero{position:relative;overflow:hidden;padding:144px 0 64px;background:radial-gradient(circle at 8% 12%,rgba(45,99,245,.13),transparent 28%),radial-gradient(circle at 88% 8%,rgba(16,168,183,.12),transparent 24%),linear-gradient(180deg,#f9fbff 0,#fff 86%)}
.article-hero h1{max-width:920px;margin:16px 0 16px;font-size:clamp(34px,4vw,52px);line-height:1.15}.article-hero .muted{max-width:760px;font-size:17px}.article-meta{display:flex;gap:14px;flex-wrap:wrap;color:#6c7890;font-size:14px}.article-meta span{display:inline-flex;align-items:center;gap:6px}.article-section{padding-top:58px}.article-layout{max-width:920px}.article-panel{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:46px}.article-content{font-size:17px;line-height:1.9;color:#243657}.article-content h2,.article-content h3{color:var(--ink);line-height:1.35;margin:34px 0 14px}.article-content h2{font-size:28px}.article-content h3{font-size:22px}.article-content p{margin:0 0 18px}.article-content a{color:var(--blue);font-weight:700}.article-content ul,.article-content ol{padding-left:24px;margin:0 0 22px}.article-content li{margin:7px 0}.article-content blockquote{margin:28px 0;padding:20px 24px;border-left:4px solid var(--blue);background:#f6f8fd;border-radius:0 16px 16px 0;color:#40506f}.article-content img{height:auto;margin:26px auto;border-radius:18px}.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}.article-tags a{padding:7px 10px;border-radius:999px;background:#edf2ff;color:var(--blue);font-size:13px;font-weight:800}.article-footer{margin-top:30px;padding-top:22px;border-top:1px solid var(--line);display:grid;gap:10px;color:#6d7890;font-size:14px}.article-footer a{color:var(--ink);font-weight:800}.latest-grid{margin-top:8px}.latest-empty{padding:24px;border:1px dashed #cfd8ea;border-radius:18px;text-align:center;color:var(--muted);background:#fff}.pagebar{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:34px}.pagebar a,.pagebar span{min-width:40px;height:40px;padding:0 13px;border:1px solid var(--line);border-radius:12px;background:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:800;color:#50607c}.pagebar .now-page,.pagebar-current{background:linear-gradient(110deg,var(--blue),var(--blue2));border-color:transparent;color:#fff}.list-hero{text-align:center}.list-hero h1{margin-left:auto;margin-right:auto}.list-hero .muted{margin-left:auto;margin-right:auto}.notfound{text-align:center}.notfound .btn{margin-top:18px}
@media(max-width:680px){.article-hero{padding:122px 0 48px}.article-panel{padding:28px 20px;border-radius:18px}.article-content{font-size:16px}.article-content h2{font-size:24px}.article-content h3{font-size:20px}}