/* 纵横数智 · 白色、浅灰、墨黑、朱红。所有资源均本地加载。 */
@font-face{font-family:ZH Serif;src:url('assets/heading-serif.woff2') format('woff2');font-style:normal;font-weight:200 900;font-display:swap}
:root{--bg:#ffffff;--paper:#ffffff;--surface:#f4f5f7;--footer:#242424;--ink:#20231f;--muted:#62666d;--line:#e2e5e9;--brand:#b73525;--brand-dark:#90291d;--max:1280px;--font:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;--serif:"ZH Serif","Noto Serif SC","Songti SC",serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:auto}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.85 var(--font);overflow-wrap:anywhere}
a{color:var(--brand);text-decoration:none;text-underline-offset:6px}
a:hover{color:var(--brand-dark);text-decoration:underline}
img{display:block;max-width:100%;height:auto}
button,input,textarea{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--brand);outline-offset:5px}
[id]{scroll-margin-top:110px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:20px;top:10px;z-index:100;background:var(--paper);padding:8px 20px}
.site-header{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 3px 12px rgba(32,35,31,.04)}
.header-inner{max-width:var(--max);min-height:90px;padding:12px 24px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{font-family:var(--serif);font-size:28px;font-weight:800;color:var(--ink);white-space:nowrap;letter-spacing:-1px}
.logo:hover{text-decoration:none}
.logo .logo-tagline{font:14px var(--font);letter-spacing:0;margin-left:14px;color:var(--muted)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{display:inline-flex;align-items:center;min-height:46px;color:var(--ink);font-size:14px;white-space:nowrap;border-bottom:1px solid transparent}
.nav a:hover,.nav a[aria-current=page]{color:var(--brand);border-bottom-color:var(--brand);text-decoration:none}
.nav a[href="contact.html"]{padding:0 26px;background:var(--brand);color:white;border:0}
.nav a[href="contact.html"]:hover{background:var(--brand-dark)}
.nav-toggle{display:none;min-width:44px;min-height:44px;padding:10px;color:var(--ink);background:transparent;border:1px solid var(--line)}
.menu-icon{display:block;margin:auto}
main{max-width:var(--max);margin:auto;padding:38px 56px 72px}
h1,h2{font-family:var(--serif);font-weight:700;letter-spacing:-.035em;line-height:1.42;text-wrap:pretty}
h1{font-size:clamp(36px,4vw,58px);margin:12px 0 20px}
h2{font-size:30px;margin:0 0 22px}
h3{font-size:19px;line-height:1.6;margin:24px 0 10px}
p{margin:12px 0}
ul,ol{padding-left:24px;margin:16px 0 24px}
li{margin:10px 0}
.breadcrumb{font-size:13px;color:var(--muted);margin:0 0 30px}
.breadcrumb a{color:var(--muted)}
.hero{padding:20px 0 52px;border-bottom:1px solid var(--line);margin-bottom:12px}
.hero-copy{max-width:900px}
.tagline{font-size:13px;letter-spacing:.1em;color:var(--brand);font-weight:600;margin:0 0 22px}
.hero .lead{font-size:20px;line-height:1.8;max-width:780px;color:#44474d;margin:14px 0}
.brand-line{color:var(--brand);font-weight:700}
.helper{font-size:13px;color:var(--muted)}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;align-items:center}
.btn{display:inline-flex;justify-content:center;align-items:center;min-height:50px;padding:11px 24px;border:1px solid var(--line);font-size:15px;font-weight:500;line-height:1.6;text-align:center;border-radius:0}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff}
.btn-secondary{background:transparent;color:var(--ink)}
.btn-secondary:hover{border-color:var(--brand);color:var(--brand)}
.panel{padding:42px 0;border-bottom:1px solid var(--line);margin:0}
.panel>p,.panel>ul,.panel>ol{max-width:900px}
.panel:last-child{border:0;padding-bottom:0}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:36px;margin:20px 0 10px}
.card{min-width:0;border-left:1px solid var(--line);padding:0 0 0 24px}
.card h3{margin:0 0 14px}
.card p{color:var(--muted);font-size:15px}
.card>a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}
.plain-steps{padding-left:24px}
.plain-steps li{padding:4px 0 12px}
.plain-steps li::marker{color:var(--brand);font-family:var(--serif);font-weight:600}
.facts-table{width:100%;border-collapse:collapse;margin:30px 0}
.facts-table caption{text-align:left;padding:14px 0;font-size:14px;color:var(--muted)}
.facts-table th,.facts-table td{vertical-align:top;text-align:left;padding:20px 22px;border-bottom:1px solid var(--line)}
.facts-table th{width:24%;font-size:14px;font-weight:600;background:var(--surface)}
.facts-table td{background:var(--paper)}
.topic-links,.footer-links{display:flex;flex-wrap:wrap;gap:10px 30px}
.topic-links{padding:18px 0 28px;border-bottom:1px solid var(--line)}
.topic-links a,.footer-links a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}
.faq-item{padding:34px 0;border-bottom:1px solid var(--line);max-width:980px}
.faq-item h2{font-family:var(--font);font-size:22px;font-weight:600;letter-spacing:0;line-height:1.65;margin:0 0 16px}
.faq-item p{color:#4c5057}
.anchor-alias{display:block}
.sample-label{font-size:14px;color:var(--brand-dark);padding:14px 18px;background:var(--surface);border-left:2px solid var(--brand)}
.sample{border-left:1px solid var(--line);padding:0 0 8px 26px;margin:30px 0}
.sample h3:first-child{margin-top:0}
.copy-row{display:flex;align-items:center;flex-wrap:wrap;gap:18px;margin:20px 0}
.copy-row code{font-family:var(--font);font-size:21px;color:var(--ink)}
button[data-copy]{min-width:10em}
label[for=consult-message]{display:block;font-size:14px;font-weight:600;margin-top:26px}
textarea{display:block;width:100%;min-height:240px;resize:vertical;padding:22px;margin:10px 0 20px;line-height:1.9;background:var(--paper);border:1px solid #9ca3ad;border-radius:0;color:var(--ink)}
.site-footer{background:var(--footer);padding:48px 56px 20px;color:#c2c4c8;font-size:13px}
.footer-inner{max-width:1168px;margin:auto}
.footer-main{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(120px,.65fr) 288px;gap:40px;align-items:start}
.footer-main>*{min-width:0}
.site-footer p{margin:0}
.site-footer .nap{font-family:var(--serif);font-weight:700;font-size:24px;line-height:1.5;color:var(--bg);margin-bottom:18px}
.footer-description{color:#d6d7da;font-size:14px;line-height:1.9}
.site-footer .footer-address{margin-top:18px}
.site-footer a{color:#e4e5e7}
.site-footer a:hover{color:#efb19f}
.site-footer :focus-visible{outline-color:#efb19f}
.site-footer h2{font:600 17px/1.6 var(--font);color:#fff;margin:0 0 16px}
.footer-links{display:flex;flex-direction:column;align-items:flex-start;gap:0}
.footer-links a{min-height:44px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:4px 24px;border-top:1px solid #4a4c50;margin-top:28px;padding-top:12px}
.footer-bottom a{display:inline-flex;align-items:center;min-height:44px}
@media(max-width:1100px){.footer-main{gap:28px}.site-footer .nap{font-size:22px}}
@media(max-width:900px){.footer-main{grid-template-columns:minmax(0,1fr);gap:28px}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px;max-width:360px}}
.hero-figure,.delivery-figure{margin:0;position:relative}
.hero-figure figcaption,.delivery-figure figcaption{font-size:11px;line-height:1.7;padding:9px 12px;color:var(--muted)}
.delivery-figure{margin:32px 0 6px}
.delivery-figure img{width:100%;height:auto}
/* 首页：保留七页优化版全部文字，以画面与阅读节奏建立层次。 */
.page-index main{padding-top:0}
.page-index .hero{display:grid;grid-template-columns:1.55fr 1fr;gap:40px;position:relative;align-items:stretch;padding:0;margin:0 -32px 0 0;border:0}
.page-index .hero-copy{padding:62px 0 50px;position:relative;z-index:1}
.page-index h1{font-size:clamp(48px,5vw,72px);line-height:1.35;letter-spacing:-.055em;margin:0 0 22px;max-width:760px}
.page-index .hero .tagline{margin-bottom:20px}
.page-index .hero .lead{font-size:22px;color:var(--ink)}
.page-index .hero-copy>p:not(.lead):not(.tagline):not(.brand-line):not(.helper):not(.identity-line):not(.cooperation-guide){font-size:16px;line-height:1.9;max-width:650px;color:var(--muted)}
.page-index .hero .brand-line{margin:22px 0;font-size:17px}
.page-index .hero .cta-row{gap:10px;margin-top:28px}
.page-index .hero .btn{padding:11px 18px}
.page-index .hero .helper{margin-top:18px}
.hero-figure{min-height:100%;background:#e8eaed}
.hero-figure img{width:100%;height:100%;object-fit:cover;object-position:70% center}
.hero-figure figcaption{position:absolute;bottom:0;left:0;right:0;background:rgba(32,35,31,.85);color:#ffffff}
.situations{padding:60px 0 50px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.situations h2{font-size:40px}
.process-panel{display:grid;grid-template-columns:1fr 1.45fr;gap:0 70px;padding:60px 0}
.process-panel h2{font-size:48px;max-width:300px;grid-row:1 / span 2}
.process-panel ol{margin:0;padding-left:32px}
.process-panel li{padding:0 0 20px;margin:0 0 20px;border-bottom:1px solid var(--line)}
.process-panel li:last-child{margin-bottom:0}
.process-panel li strong{display:block;font-size:20px;margin-bottom:6px}
.process-panel>p{grid-column:2}
.delivery-panel{background:var(--footer);color:var(--bg);margin:0 -56px;padding:58px 56px 38px;border:0}
.delivery-panel h2{font-size:54px;max-width:800px}
.delivery-panel>p{color:#d6d7da;max-width:950px}
.delivery-panel .delivery-figure figcaption{color:#c2c4c8;padding-left:0}
.introduction-panel{padding-top:55px}
.learning-panel h3{font-family:var(--serif);font-size:28px;font-weight:600}
.contact-panel{padding-top:50px}
.contact-panel h2{font-size:48px}
@media(min-width:1600px){.page-index .hero{gap:40px}.page-index h1{font-size:72px}}
@media(max-width:1100px){
 .nav{gap:15px}.header-inner{gap:18px}.logo{font-size:25px}.logo .logo-tagline{margin-left:8px;font-size:12px}.nav a{font-size:13px}.nav a[href="contact.html"]{padding:0 18px}
 main{padding-left:36px;padding-right:36px}.site-footer{padding-left:36px;padding-right:36px}.page-index .hero{gap:28px;margin-right:-12px}.page-index h1{font-size:52px}.page-index .hero-copy{padding-top:48px}.delivery-panel{margin:0 -36px;padding-left:36px;padding-right:36px}.page-index .hero .btn{font-size:14px;padding:11px 14px}
}
@media(max-width:900px){
 .header-inner{min-height:76px;flex-wrap:wrap;padding:12px 24px;gap:8px 16px}.logo{font-size:25px}.logo .logo-tagline{font-size:12px}
 .nav{width:100%;flex-direction:column;flex-wrap:nowrap;align-items:stretch;gap:0;padding:0 0 8px}.nav a{min-height:46px;flex-shrink:0;width:100%;font-size:15px;padding:8px 12px}.nav a[href="contact.html"]{padding:8px 12px;margin-top:8px}
 .js .nav-toggle{display:inline-block}.js .nav{display:none;max-height:calc(100vh - 90px);max-height:calc(100dvh - 90px);overflow-y:auto;overscroll-behavior:contain}.js .nav.is-open{display:flex}
 .page-index h1{font-size:46px}.page-index .hero{gap:22px;grid-template-columns:1.2fr 1fr}.page-index .hero .lead{font-size:18px}.page-index .hero .cta-row{flex-direction:column;align-items:stretch}.page-index .hero-copy>p:not(.lead):not(.tagline):not(.brand-line):not(.helper):not(.identity-line):not(.cooperation-guide){font-size:13px}
 .cards{gap:24px}.card{padding-left:18px}.process-panel{gap:0 32px}.process-panel h2{font-size:34px}.delivery-panel h2{font-size:38px}
}
@media(max-width:600px){
 body{font-size:15px;line-height:1.85}.header-inner{min-height:70px;padding:12px 20px}.logo{font-size:23px}.logo .logo-tagline{font-size:11px;margin-left:7px}.nav-toggle{font-size:13px}
 main{padding:24px 22px 48px}h1{font-size:36px;line-height:1.45}h2{font-size:27px}h3{font-size:18px}.hero{padding:8px 0 32px}.hero .lead{font-size:17px}.tagline{font-size:12px;letter-spacing:.04em;margin-bottom:16px}.breadcrumb{margin-bottom:24px;font-size:12px}
 .panel{padding:32px 0}.cards{grid-template-columns:1fr;gap:24px;margin-top:22px}.card{border-left:0;border-top:1px solid var(--line);padding:22px 0 0}.card:first-child{border-top:0;padding-top:0}.card h3{margin-bottom:8px}.card p{font-size:14px}
 .cta-row{gap:10px;margin-top:24px}.btn{min-height:48px;padding:11px 18px;font-size:14px}.helper{font-size:12px}
 .page-index main{padding-top:0}.page-index .hero{display:flex;flex-direction:column;gap:0;margin:0 -22px;border:0}.page-index .hero-copy{padding:36px 22px 30px}.page-index h1{font-size:43px;line-height:1.4;letter-spacing:-.04em;margin-bottom:18px}.page-index .hero .lead{font-size:18px}.page-index .hero-copy>p:not(.lead):not(.tagline):not(.brand-line):not(.helper):not(.identity-line):not(.cooperation-guide){font-size:13px}.page-index .hero .brand-line{font-size:16px;margin:20px 0}.page-index .hero .cta-row{flex-direction:row;align-items:stretch;gap:10px}.page-index .hero .btn{font-size:13px;padding:11px 12px}.page-index .hero .helper{margin-bottom:0}
 .hero-figure{height:260px;min-height:0}.hero-figure img{object-position:65% 52%}.hero-figure figcaption{font-size:10px;padding:7px 14px}
 .situations{padding:36px 0}.situations h2{font-size:27px}.process-panel{display:block;padding:36px 0}.process-panel h2{max-width:none;font-size:30px}.process-panel ol{padding-left:24px;margin-top:24px}.process-panel li{padding-bottom:14px;margin-bottom:18px}.process-panel li strong{font-size:18px}.process-panel>p{font-size:13px;margin-bottom:0}
 .delivery-panel{margin:0 -22px;padding:34px 22px 22px}.delivery-panel h2{font-size:32px}.delivery-panel>p{font-size:14px}.delivery-figure{margin-top:24px}.delivery-figure figcaption{font-size:10px}.delivery-panel .delivery-figure img{width:100%;height:auto}
 .introduction-panel{padding-top:36px}.learning-panel h3{font-size:24px;line-height:1.6}.contact-panel h2{font-size:32px}
 .facts-table,.facts-table tbody,.facts-table tr,.facts-table th,.facts-table td,.facts-table caption{display:block;width:100%}.facts-table caption{font-size:13px;line-height:1.6;padding:14px 0}.facts-table th{border:0;padding:15px 18px 3px;background:var(--paper);font-size:13px;color:var(--muted)}.facts-table td{padding:4px 18px 16px}
 .faq-item{padding:28px 0}.faq-item h2{font-size:19px}.topic-links{gap:4px 22px;padding:8px 0 20px}.topic-links a{font-size:13px}.sample{padding-left:18px}.sample-label{padding:12px 14px;font-size:13px}
 .copy-row code{font-size:19px}textarea{padding:16px;font-size:14px;min-height:250px}.copy-row{gap:12px}
 .site-footer{padding:32px 22px 16px;font-size:12px}.site-footer .nap{font-size:20px;margin-bottom:12px}.footer-description{font-size:13px}.site-footer .footer-address{margin-top:12px}.footer-main{gap:20px}.site-footer h2{font-size:16px;margin-bottom:10px}.footer-navigation h2{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.footer-links{display:flex;flex-direction:row;flex-wrap:wrap;gap:0 20px;max-width:none}.footer-links a{font-size:13px}.footer-bottom{margin-top:24px;padding-top:10px;gap:0 20px}
 [id]{scroll-margin-top:90px}
}
@media(max-width:360px){.page-index h1{font-size:36px}.page-index .hero .cta-row,.cta-row{flex-direction:column;align-items:stretch}.logo{font-size:21px}.logo .logo-tagline{font-size:10px}.header-inner{padding-left:16px;padding-right:16px;gap:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* 身份与合作选择仅补文字层级，沿用现有首屏分栏和配色。 */
.page-index .hero .identity-line{font-size:18px;line-height:1.7;margin:12px 0}
.identity-line a{color:var(--ink);font-weight:600}
.page-index .hero .cooperation-guide{font-size:14px;line-height:1.85;margin:18px 0 0}
.cooperation-guide a{display:inline-flex;align-items:center;min-height:44px}
@media(max-width:360px){.page-index .hero .identity-line{font-size:16px}}

/* 品牌图形与理念沿用现有色彩、分隔和字号体系。 */
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px}
.logo-mark{width:48px;height:48px;object-fit:contain;flex:0 0 auto;background:#fff;border-radius:50%}
.logo-copy{display:block}
.brand-principles{display:grid;grid-template-columns:220px minmax(0,1fr);align-items:center;gap:44px}
.brand-emblem{margin:0;display:flex;justify-content:center;align-items:center}
.brand-emblem img{width:220px;height:220px;object-fit:contain}
.brand-principles-copy{min-width:0}
.brand-principles-intro{font-size:20px;font-weight:600;margin-top:0}
.brand-principles h3{margin:22px 0 8px}
.brand-principles-links{display:flex;flex-wrap:wrap;gap:8px 24px;margin-bottom:0}
.brand-principles-links a{display:inline-flex;align-items:center;min-height:44px}
@media(max-width:1100px){.logo-mark{width:42px;height:42px}.logo{gap:9px}.brand-principles{grid-template-columns:180px minmax(0,1fr);gap:30px}.brand-emblem img{width:180px;height:180px}}
@media(max-width:600px){.logo-mark{width:36px;height:36px}.logo{gap:8px}.brand-principles{grid-template-columns:1fr;gap:18px;align-items:start}.brand-emblem{justify-content:flex-start}.brand-emblem img{width:144px;height:144px}.brand-principles-intro{font-size:17px}.brand-principles h3{font-size:17px}.brand-principles-links{gap:4px 22px}}
@media(max-width:360px){.logo-mark{width:32px;height:32px}.logo-copy{display:flex;flex-direction:column;align-items:flex-start;gap:3px;line-height:1.25}.logo .logo-tagline{margin-left:0;line-height:1.4}}

/* Neutral palette section rhythm */
.page-index .situations,
.page-index .learning-panel,
.page-about main>.panel:nth-of-type(odd),
.page-services main>.panel:nth-of-type(odd),
.page-course main>.panel:nth-of-type(odd),
.page-contact main>.panel:nth-of-type(even):not(:last-child),
.page-faq .faq-item:nth-of-type(even){background:var(--surface);box-shadow:0 0 0 100vmax var(--surface);clip-path:inset(0 -100vmax)}
.situations .card{background:var(--paper);border-left:2px solid var(--brand);border-top:0;padding:24px}
.btn-secondary{background:var(--paper)}
.btn-secondary:hover{background:var(--surface)}
.nav-toggle:hover{background:var(--surface)}
@media(max-width:600px){.situations .card{padding:20px;border-left:2px solid var(--brand);border-top:0}.facts-table th{background:var(--surface)}}
/* 实际二维码保留完整图案与白色留边，咨询与关注入口分层。 */
.qr-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px}
.qr-card{margin:0;min-width:0}
.qr-image-link{display:flex;align-items:center;justify-content:center;background:#fff;width:208px;max-width:100%;aspect-ratio:1;padding:6px;border:1px solid var(--line)}
.qr-code-viewport{display:block;position:relative;overflow:hidden;width:100%;aspect-ratio:1}
.qr-code-viewport img{display:block;width:100%;height:100%;max-width:none;max-height:none;object-fit:contain}
.qr-wecom .qr-image-link{padding:14px}
.qr-card figcaption{display:flex;flex-direction:column;align-items:flex-start;padding-top:16px;line-height:1.7}
.qr-card figcaption strong{font-size:17px;color:var(--ink)}
.qr-card figcaption span{font-size:13px;color:var(--muted);margin-top:5px;overflow-wrap:anywhere}
.qr-save{display:inline-flex;align-items:center;min-height:44px;font-size:13px}
.footer-qrs{margin:0;padding:0}
.footer-qrs .qr-grid{grid-template-columns:repeat(2,minmax(0,1fr));width:288px;max-width:100%;gap:20px 32px}
.footer-qrs .qr-grid-single{width:128px;grid-template-columns:minmax(0,1fr)}
.footer-qrs .qr-image-link{width:128px;padding:5px}
.footer-qrs .qr-wecom .qr-image-link{padding:8px}
.footer-qrs .qr-card figcaption{padding-top:10px}
.footer-qrs .qr-card figcaption strong{color:#fff;font-size:15px}
.footer-qrs .qr-card figcaption span{font-size:12px;margin-top:3px}
.footer-qrs .qr-save,.footer-qrs .qr-hint{font-size:12px}
.footer-qrs .qr-card figcaption span,.footer-qrs .qr-hint{color:#c2c4c8}
.qr-hint{font-size:13px;line-height:1.85;margin-top:18px;max-width:780px}
.wechat-consult{display:grid;grid-template-columns:256px minmax(0,1fr);gap:44px;align-items:center}
.wechat-consult .qr-image-link{width:224px}
.wechat-consult .qr-card figcaption span{display:none}
.wechat-consult>div{min-width:0}
.wechat-consult>div>p:first-child{margin-top:0}
@media(max-width:900px){.qr-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 24px}.wechat-consult{grid-template-columns:220px minmax(0,1fr);gap:28px}}
@media(max-width:600px){.qr-grid{gap:24px 16px}.qr-card figcaption{padding-top:12px}.qr-card figcaption strong{font-size:16px}.qr-card figcaption span{font-size:12px}.footer-qrs .qr-grid{width:248px;gap:18px 24px}.footer-qrs .qr-grid-single{width:112px}.footer-qrs .qr-image-link{width:112px}.qr-hint{font-size:12px}.wechat-consult{grid-template-columns:1fr;gap:20px}.wechat-consult>.qr-card{width:224px;max-width:100%}.wechat-consult>div>p{margin-top:0}}
@media(max-width:360px){.footer-qrs .qr-grid{gap:18px 16px}}

/* 通栏品牌首屏：图片延伸至导航顶部，正文保持原有白灰层次。 */
:root{--header-height:91px}
body{overflow-x:clip}
.site-header{background:#14181c;border-bottom-color:rgba(255,255,255,.17);box-shadow:none;transition:background-color .18s,border-color .18s,box-shadow .18s}
.js .site-header:not(.is-scrolled){background:transparent}
.site-header .logo,.site-header .logo .logo-tagline,.site-header .nav a{color:#fff}
.site-header .logo .logo-tagline{opacity:.8}
.site-header .nav a:hover,.site-header .nav a[aria-current=page]{color:#ffc7b9;border-bottom-color:#ffc7b9}
.site-header .nav a[href="contact.html"]{color:#fff;background:var(--brand);border:0}
.site-header .nav-toggle{color:#fff;border-color:rgba(255,255,255,.45);background:rgba(20,24,28,.25)}
.site-header .nav-toggle:hover{background:rgba(255,255,255,.1)}
.site-header :focus-visible{outline-color:#ffc7b9}
.site-header.is-scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:0 3px 12px rgba(32,35,31,.07)}
.site-header.is-scrolled .logo,.site-header.is-scrolled .nav a{color:var(--ink)}
.site-header.is-scrolled .logo .logo-tagline{color:var(--muted);opacity:1}
.site-header.is-scrolled .nav a:hover,.site-header.is-scrolled .nav a[aria-current=page]{color:var(--brand);border-bottom-color:var(--brand)}
.site-header.is-scrolled .nav a[href="contact.html"]{color:#fff;border:0}
.site-header.is-scrolled .nav-toggle{color:var(--ink);border-color:var(--line);background:#fff}
.site-header.is-scrolled :focus-visible{outline-color:var(--brand)}
main,.page-index main{padding-top:0}
.hero.brand-hero,.page-index .hero.brand-hero{position:relative;isolation:isolate;display:flex;flex-direction:column;justify-content:center;align-items:stretch;min-height:310px;padding:80px 0 72px;margin:0;border:0;color:#fff;overflow:visible}
.hero-backdrop{position:absolute;z-index:-2;top:calc(-1 * var(--header-height));bottom:0;left:50%;width:100vw;margin:0;transform:translateX(-50%);background:#14181c;pointer-events:none}
.hero-backdrop picture,.hero-backdrop img{display:block;width:100%;height:100%}
.hero-backdrop img{object-fit:cover;object-position:center}
.brand-hero::before{content:"";position:absolute;z-index:-1;top:calc(-1 * var(--header-height));bottom:0;left:50%;width:100vw;transform:translateX(-50%);background:linear-gradient(90deg,rgba(12,17,21,.83) 0%,rgba(12,17,21,.56) 52%,rgba(12,17,21,.12) 100%);pointer-events:none}
.brand-hero .hero-copy{max-width:850px}
.brand-hero h1{color:#fff;text-shadow:0 2px 24px rgba(0,0,0,.18)}
.hero-title-line{display:block;white-space:nowrap}
.brand-hero .hero-copy .tagline{color:#ffc7b9;font-size:13px;letter-spacing:.09em;margin-bottom:20px}
.brand-hero .hero-copy .lead{color:#ecedef;font-size:20px;line-height:1.8;max-width:760px}
.brand-hero .breadcrumb{position:absolute;top:23px;left:0;margin:0;color:#c4cbd1;font-size:12px}
.brand-hero .breadcrumb a{color:#e3e7ea}
.brand-hero a:focus-visible{outline-color:#ffc7b9}
.brand-hero .btn-secondary{background:rgba(15,20,24,.35);border-color:rgba(255,255,255,.58);color:#fff}
.brand-hero .btn-secondary:hover{background:rgba(255,255,255,.12);border-color:#fff}
:is(.page-index,.page-services,.page-course) .hero.brand-hero{min-height:660px;padding:48px 0 58px}
.page-index .brand-hero .hero-copy{max-width:850px;padding:0}
.page-index .brand-hero h1{font-size:64px;line-height:1.32;max-width:850px;letter-spacing:-.035em;margin-bottom:20px}
.page-index .brand-hero .hero-copy .lead{font-size:21px;max-width:740px;margin:12px 0}
.page-index .brand-hero .hero-copy .brand-line{color:#ffc7b9;font-size:17px;margin:17px 0 10px}
.page-index .brand-hero .hero-copy .identity-line{font-size:18px;margin:10px 0}
.page-index .brand-hero .identity-line a{color:#fff}
.page-index .brand-hero .hero-copy>p:not(.lead):not(.tagline):not(.brand-line):not(.helper):not(.identity-line):not(.cooperation-guide){font-size:15px;line-height:1.85;color:#d5dce1;max-width:760px;margin:10px 0}
.page-index .brand-hero .cta-row{margin-top:24px;flex-direction:row;align-items:center;gap:12px}
.page-index .brand-hero .cooperation-guide{display:flex;flex-wrap:wrap;gap:0 28px;font-size:13px;line-height:1.7;margin:12px 0 0}
.brand-hero .cooperation-guide a{color:#e3e7ea;min-height:44px}
.brand-hero .cooperation-guide br{display:none}
.page-about .hero.brand-hero,.page-faq .hero.brand-hero{min-height:400px}
.page-course .brand-hero .hero-copy{max-width:900px}
.page-course .brand-hero h1{font-size:54px;line-height:1.5;max-width:900px}
.page-course .brand-hero .lead{color:#ffc7b9;font-size:23px}
.hero-details{padding:36px 0;border-bottom:1px solid var(--line);max-width:940px}
.hero-details p:first-child{margin-top:0}
.hero-details p:last-child{margin-bottom:0}
.hero-details>p{font-size:16px}
.hero-details .helper{font-size:13px}
@media(max-width:1100px){.page-index .brand-hero h1{font-size:56px}:is(.page-index,.page-services,.page-course) .hero.brand-hero{min-height:640px}.page-course .brand-hero h1{font-size:46px}}
@media(max-width:900px){
 :root{--header-height:77px}
 .header-inner{position:relative}
 .js .site-header .nav{position:absolute;top:100%;left:24px;right:24px;width:auto;max-height:calc(100vh - 100px);max-height:calc(100dvh - 100px);background:#14181c;border:1px solid rgba(255,255,255,.18);padding:12px;box-shadow:0 12px 32px rgba(0,0,0,.18)}
 .js .site-header.is-scrolled .nav{background:#fff;border-color:var(--line)}
 .page-index .brand-hero h1{font-size:50px}
 :is(.page-index,.page-services,.page-course) .hero.brand-hero{min-height:610px;padding:40px 0 52px}
 .page-course .brand-hero h1{font-size:40px}
}
@media(max-width:600px){
 :root{--header-height:71px}
 .js .site-header .nav{left:20px;right:20px}
 .hero.brand-hero,.page-index .hero.brand-hero{min-height:270px;margin:0;padding:76px 0 58px;gap:0}
 .brand-hero::before{background:linear-gradient(90deg,rgba(12,17,21,.88),rgba(12,17,21,.72))}
 .brand-hero .hero-copy .tagline{font-size:11px;margin:0 0 17px;letter-spacing:.04em}
 .brand-hero .hero-copy .lead{font-size:16px;line-height:1.85}
 .brand-hero .breadcrumb{top:22px;font-size:11px}
 :is(.page-index,.page-services,.page-course) .hero.brand-hero{min-height:440px;padding:64px 0 52px}
 .page-index .brand-hero h1{font-size:40px;line-height:1.4;letter-spacing:-.04em;margin-bottom:17px}
 .page-index .brand-hero .hero-copy .lead{font-size:17px;line-height:1.85}
 .page-index .brand-hero .hero-copy .brand-line{font-size:15px;margin:16px 0 10px}
 .page-index .brand-hero .hero-copy .identity-line{font-size:16px;margin:10px 0}
 .page-index .brand-hero .hero-copy>p:not(.lead):not(.tagline):not(.brand-line):not(.helper):not(.identity-line):not(.cooperation-guide){font-size:13px;line-height:1.9}
 .page-index .brand-hero .hero-copy .cooperation-guide{font-size:12px;display:block;margin-top:10px}
 .brand-hero .cooperation-guide a{display:flex;min-height:44px}
 .page-index .brand-hero .cta-row{margin-top:20px;gap:10px;align-items:stretch}
 .page-index .brand-hero .cta-row .btn{font-size:13px;padding:11px 12px}
 .page-about .hero.brand-hero,.page-faq .hero.brand-hero{min-height:340px}
 .page-course .brand-hero h1{font-size:34px;line-height:1.55}
 .page-course .brand-hero .hero-copy .lead{font-size:18px}
 .hero-details{padding:28px 0}.hero-details>p{font-size:14px}.hero-details .helper{font-size:12px}
}
@media(max-width:360px){.page-index .brand-hero h1{font-size:34px}.page-index .brand-hero .cta-row{flex-direction:column;align-items:stretch}.page-course .brand-hero h1{font-size:30px}.brand-hero .hero-copy .tagline{font-size:10px}}
/* 首屏副标题在手机端保持单行；极窄视口或放大字体时省略溢出。 */
@media(max-width:600px){
 .page-index .brand-hero h1{font-size:min(40px,calc((100vw - 44px)/9))}
 .page-services .brand-hero h1{font-size:min(36px,calc((100vw - 44px)/7.6))}
 .hero.brand-hero .hero-copy{width:100%;min-width:0}
 .hero.brand-hero .hero-copy>.lead,.hero.brand-hero .hero-copy>.tagline,.hero.brand-hero .hero-copy>.brand-line{max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
}
@media(prefers-reduced-motion:reduce){.site-header{transition:none}}

/* 微信小店原码独立放在报名区，保留原始颜色与完整图案。 */
.shop-entry{display:grid;grid-template-columns:300px minmax(0,1fr);gap:40px;align-items:center;margin-top:32px;padding-top:30px;border-top:1px solid var(--line)}
.qr-shop .qr-image-link{width:300px;padding:12px;background:#fff;border-color:var(--line)}
.qr-shop .qr-code-viewport{background:#fff}
.qr-shop .qr-card{max-width:100%}
.shop-copy{min-width:0}
.shop-copy h3{font-size:23px;margin:0 0 14px}
.shop-copy>p:last-child{margin-bottom:0}
@media(max-width:600px){.shop-entry{grid-template-columns:minmax(0,1fr);gap:20px;margin-top:26px;padding-top:26px}.shop-entry>.qr-card{width:300px;max-width:100%}.shop-copy h3{font-size:20px}.shop-copy p{font-size:14px}.shop-copy .helper{font-size:12px}}

/* 首页身份与主营产品集中承载，首屏只保留主张和咨询动作。 */
.page-index #overview.process-panel{display:block;padding:56px 0}
.page-index #overview>h2{max-width:none;font-size:40px;margin-bottom:32px}
.overview-identity{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.overview-identity article{min-width:0;display:flex;flex-direction:column;align-items:flex-start}
.overview-identity article+article{padding-left:40px;border-left:1px solid var(--line)}
.overview-identity h3{font:500 14px/1.7 var(--font);color:var(--muted);margin:0 0 14px}
.overview-name{font:700 29px/1.55 var(--serif);margin:0 0 12px;color:var(--ink)}
.overview-name span{display:block;font:500 15px/1.8 var(--font);margin-top:5px;color:var(--ink)}
.overview-identity article>p:not(.overview-name){font-size:15px;line-height:1.9;margin:0 0 16px;color:var(--muted)}
.overview-link{display:inline-flex;align-items:center;min-height:44px;font-size:14px;margin-top:auto}
.overview-products{border-top:1px solid var(--line);margin-top:34px;padding-top:30px}
.overview-products>h3{font-size:22px;margin:0 0 20px}
.product-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.product-entry{min-width:0;display:flex;flex-direction:column;align-items:flex-start;background:var(--surface);border-top:2px solid var(--brand);padding:26px}
.product-entry .product-kind{font-size:13px;font-weight:600;color:var(--brand);margin:0 0 10px}
.product-entry h4{font:600 25px/1.6 var(--serif);margin:0 0 14px;color:var(--ink)}
.product-entry>p:not(.product-kind){font-size:15px;line-height:1.9;color:var(--muted);margin:0 0 14px}
.product-entry>p.helper,.product-entry>p.method-summary{font-size:13px}
.product-entry .overview-link{padding-top:4px}
@media(max-width:900px){.overview-identity{gap:28px}.overview-identity article+article{padding-left:28px}.product-grid{gap:22px}.product-entry{padding:22px}.product-entry h4{font-size:22px}}
@media(max-width:600px){.page-index #overview.process-panel{padding:34px 0}.page-index #overview>h2{font-size:29px;margin-bottom:26px}.overview-identity,.product-grid{grid-template-columns:1fr;gap:24px}.overview-identity article+article{padding:24px 0 0;border-left:0;border-top:1px solid var(--line)}.overview-name{font-size:26px}.overview-identity article>p:not(.overview-name){font-size:14px;margin-bottom:10px}.overview-name span{font-size:14px}.overview-products{margin-top:26px;padding-top:26px}.overview-products>h3{font-size:21px}.product-entry{padding:20px}.product-entry h4{font-size:22px}.product-entry>p:not(.product-kind){font-size:14px}.product-entry>p.helper,.product-entry>p.method-summary{font-size:12px}}

/* 用户提供的真实肖像与五行人设，首页/关于页共用同一份内容。 */
.founder-profile{display:grid;grid-template-columns:160px minmax(0,1fr);gap:22px;align-items:center;width:100%;margin:0 0 20px}
.founder-photo-frame{display:block;width:160px;aspect-ratio:1;overflow:hidden;border-radius:50%;border:4px solid var(--paper);outline:1px solid var(--line);box-shadow:0 7px 22px rgba(32,35,31,.1)}
.founder-portrait{display:block;width:100%;height:100%;max-width:none;aspect-ratio:1;object-fit:cover;transform:scale(1.12);transform-origin:50% 35%;border:0}
.founder-caption{min-width:0}
.founder-name{font:700 27px/1.5 var(--serif);margin:0 0 12px;color:var(--ink)}
.founder-name span{font:400 13px/1.8 var(--font);white-space:nowrap;margin-left:3px}
.founder-credentials{list-style:none;padding:0;margin:0;font-size:14px;line-height:1.9;color:var(--ink)}
.founder-credentials li{margin:3px 0;padding:0;border:0}
.page-about .founder-profile{grid-template-columns:200px minmax(0,1fr);gap:32px;max-width:760px;margin:8px 0 26px}
.page-about .founder-photo-frame{width:200px}
.page-about .founder-name{font-size:32px}
.page-about .founder-credentials{font-size:16px}
@media(max-width:1100px){.founder-profile{grid-template-columns:140px minmax(0,1fr);gap:18px}.founder-photo-frame{width:140px}.founder-name{font-size:24px}.founder-name span{font-size:12px}.founder-credentials{font-size:13px}}
@media(min-width:601px) and (max-width:800px){.overview-identity{grid-template-columns:1fr}.overview-identity article+article{border-left:0;border-top:1px solid var(--line);padding:26px 0 0}}
@media(max-width:600px){.founder-profile{grid-template-columns:112px minmax(0,1fr);gap:18px}.founder-photo-frame{width:112px}.founder-name{font-size:24px;margin-bottom:8px}.founder-credentials{font-size:13px}.page-about .founder-profile{grid-template-columns:128px minmax(0,1fr);gap:18px}.page-about .founder-photo-frame{width:128px}.page-about .founder-name{font-size:25px}.page-about .founder-credentials{font-size:13px}}
@media(max-width:360px){.founder-profile,.page-about .founder-profile{grid-template-columns:minmax(0,1fr);gap:18px}.founder-photo-frame,.page-about .founder-photo-frame{width:160px}.founder-name,.page-about .founder-name{font-size:26px}}
.overview-identity .overview-company>p.overview-core-statement{font-size:15px;font-weight:600;line-height:1.85;color:var(--brand);margin:0 0 14px}
.overview-core-statement a{display:inline-flex;align-items:center;min-height:44px;padding:4px 0}
@media(max-width:600px){.overview-identity .overview-company>p.overview-core-statement{font-size:14px}}

/* 介绍先读，具体方法按需展开；沿用现有颜色与区块。 */
.method-details{margin-top:16px;padding-top:10px;border-top:1px solid var(--line)}
.method-details>summary{cursor:pointer;min-height:46px;padding:9px 0;color:var(--brand);font-size:15px;font-weight:600;line-height:1.8}
.method-details[open]>summary{margin-bottom:14px}
.method-details>p,.method-details>ul,.method-details>ol{max-width:900px}
.method-details summary::marker,.faq-item summary::marker{color:var(--brand)}
.faq-item{padding:14px 0}
.faq-item summary{cursor:pointer;padding:10px 0;min-height:48px;line-height:1.65}
.faq-item summary h2{display:inline;margin:0;font-size:20px}
.faq-item details[open]>summary{margin-bottom:8px}
@media(max-width:600px){.method-details>summary{font-size:14px}.faq-item{padding:9px 0}.faq-item summary h2{font-size:18px}}

/* 张连接自用的六位 AI 助手：头像、名称与极简职责直接展示。 */
.expert-team-note{font-size:14px;color:var(--muted);margin:-8px 0 28px}
.expert-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:28px 22px;align-items:start}
.expert-card{min-width:0;background:transparent;text-align:center;padding:12px 6px}
.expert-card>img{width:112px;height:112px;object-fit:cover;border-radius:50%;border:3px solid var(--paper);outline:1px solid var(--line);margin:0 auto 14px}
.expert-card .expert-name{font-family:var(--font);font-size:16px;font-weight:600;line-height:1.7;margin:0 0 6px;color:var(--ink)}
.expert-card .expert-inline-duty{font-size:13px;font-weight:400;line-height:1.8;color:var(--muted);margin:0 auto;max-width:18em;text-align:center}
@media(max-width:1000px){.expert-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:600px){.expert-team-note{font-size:12px;margin-bottom:20px}.expert-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 16px}.expert-card{padding:10px 2px}.expert-card>img{width:82px;height:82px;border-width:2px;margin-bottom:12px}.expert-card .expert-name{font-size:14px}.expert-card .expert-inline-duty{font-size:12px}}