:root{--ink:#0f172a;--muted:#62708a;--blue:#3066e6;--navy:#101f3d;--ice:#f4f7fc;--line:#e5ebf3;--white:#fff;--radius:22px;--shadow:0 18px 60px rgba(16,31,61,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #7fa7ff;outline-offset:3px}::selection{background:#d9e5ff}.container{width:min(1160px,calc(100% - 44px));margin-inline:auto}.top{position:sticky;z-index:60;top:0;background:rgba(255,255,255,.89);backdrop-filter:saturate(180%) blur(24px);border-bottom:1px solid 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h3{font-size:15px}.footer-grid{grid-template-columns:1fr;gap:23px}.page-pad{padding-block:38px 70px}.section-title h1{font-size:38px}.lead{font-size:15px}.article-hero{padding:26px}.article-layout{grid-template-columns:1fr}.article-aside{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.article-aside .aside-box{margin:0}.article-aside .ad-panel{padding:15px}.calc-grid{grid-template-columns:repeat(2,1fr)}.metrics{grid-template-columns:repeat(2,1fr)}.prompt-grid,.case-grid{grid-template-columns:1fr}.progress-widget{grid-template-columns:1fr}.progress-actions{grid-column:auto}.sources-grid{grid-template-columns:1fr}}@media (max-width:480px){.hero h1{font-size:38px}.hero-art{min-height:370px}.funnel-flow b{font-size:14px}.funnel-strip{gap:8px}.step-flow{padding:13px;min-height:122px}.step-flow strong{font-size:14px}.chapter-grid{grid-template-columns:1fr}.chapter-card{min-height:170px}.feature-grid{grid-template-columns:1fr 1fr}.feature-grid>a{min-height:200px}.feature-grid h3{font-size:14px}.feature-grid p{font-size:12px}.article-aside{grid-template-columns:1fr}.calc-grid,.audit-grid{grid-template-columns:1fr}.metrics strong{font-size:21px}.tool-card{padding:20px}.day-row{padding:13px;gap:8px}.day-num{width:49px}.day-body strong{font-size:13px}.day-body small{font-size:12px}.week-heading{padding:15px}.week-heading h2{font-size:17px}.ad-panel{padding:22px}.chapter-nav{font-size:11px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

[hidden]{display:none!important}
.script-evidence{margin:15px 0 0;font-size:12px;color:#5673a2;border-top:1px solid #e6edf8;padding-top:12px}.feature-grid{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}


/* Business contacts: displayed on every page, with a copyable WeChat ID. */
.contact-strip{background:#eef4ff;border-bottom:1px solid #dce8fb}
.contact-inner{display:flex;align-items:center;justify-content:center;gap:11px 18px;flex-wrap:wrap;padding:9px 0;font-size:12px;line-height:1.5;color:#50617c}
.contact-inner a{color:#2057c3;font-weight:750;text-decoration:underline;text-underline-offset:2px}
.contact-inner strong,.hero-contact strong{color:#122e60;letter-spacing:.02em}
.contact-inner button,.hero-contact button{border:1px solid #b9ccf1;border-radius:99px;color:#2154b8;background:#fff;padding:6px 12px;font-size:12px;font-weight:750;cursor:pointer}
.hero-contact{display:flex;align-items:center;flex-wrap:wrap;gap:9px 18px;margin:0 0 20px;padding:12px 16px;border:1px solid #d5e2f6;border-radius:13px;background:#fff;color:#50627f;font-size:13px}
.hero-contact a{color:#2057c3;text-decoration:underline;text-underline-offset:2px;font-weight:750}
@media(max-width:760px){
.contact-inner{justify-content:flex-start;font-size:11px;gap:6px 12px}
.hero-contact{font-size:12px;gap:8px 12px}
}