:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif;background:#f8f9fc;color:#192235}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.68}a{color:#305edb;text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button{cursor:pointer}.wrap{max-width:1150px;margin:auto;padding:0 24px}.top{position:sticky;top:0;background:#fffdfef0;backdrop-filter:blur(18px);border-bottom:1px solid #e7e9f0;z-index:10}.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:68px}.nav-links{display:flex;gap:20px;align-items:center;flex-wrap:wrap;font-size:14px}.brand{font-weight:800;white-space:nowrap;color:#152440}.adlink{color:#2857cc;font-weight:650}.hero{padding:92px 0 80px;background:linear-gradient(135deg,#edf3ff 0%,#fff 58%,#f4edff 100%)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center}.eyebrow{color:#4161b7;letter-spacing:1.6px;font-weight:800;font-size:12px;text-transform:uppercase}.hero h1{font-size:clamp(42px,5.4vw,72px);line-height:1.12;letter-spacing:-2px;margin:18px 0}.accent{color:#466ce9}.lead{font-size:18px;color:#59677b;max-width:600px}.hero-panel,.panel,.chapter,.path,.adv,.insight{background:#fff;border:1px solid #e6eaf2;border-radius:22px;box-shadow:0 12px 38px #1f36610d}.hero-panel{padding:30px}.stage{border-left:3px solid #6d88e9;margin:15px 0;padding:9px 16px}.stage strong{display:block}.stage small{color:#748095}.section{padding:65px 0}.section h2{font-size:32px;line-height:1.3;letter-spacing:-.8px;margin:8px 0 14px}.sub{color:#6b778c}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.path{padding:23px;text-align:left;background:white;color:inherit;border:1px solid #e2e9f4}.path.active{border-color:#4468e5;background:#f1f5ff}.path h3{margin:12px 0 3px}.path small{color:#65758c}.number{font-weight:800;color:#466ce9}.result{padding:22px;margin-top:18px;border-radius:18px;border:1px solid #ccd9f1;background:#eef4ff}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.chapter{padding:22px;display:block;color:inherit}.chapter:hover{border-color:#9bb3ee;text-decoration:none;transform:translateY(-2px)}.chapter h3{margin:8px 0;font-size:18px;line-height:1.4}.chapter p{font-size:14px;color:#68748a}.meta{font-weight:750;color:#5272d9;font-size:12px;letter-spacing:.5px}.filters{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}input,select{min-width:0;padding:12px;border-radius:10px;border:1px solid #d9e0ed;background:#fff;color:#202b42}#search{flex:1;min-width:250px}.button{display:inline-block;border:0;border-radius:10px;padding:12px 18px;background:#456bdf;color:#fff;font-weight:750;margin:6px 8px 6px 0}.button:hover{text-decoration:none;background:#2b50c6}.secondary{background:#e8edf9;color:#2a4ca0}.secondary:hover{background:#dce5fb}.toolgrid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.panel{padding:24px}.fields{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.fields label{font-size:13px;color:#65718c}.fields input{display:block;width:100%;margin-top:5px}.metric{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid #e7edf6;gap:12px}.metric strong{font-size:20px;color:#315ace}.days{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.day{background:#fff;border:1px solid #e1e6f0;border-radius:12px;padding:13px;font-size:13px}.day input{vertical-align:middle;margin-right:7px}.progress{height:10px;background:#e7ebf6;border-radius:20px;overflow:hidden;margin:15px 0}.progress span{display:block;height:100%;background:#5679ed;width:0}.prompt{width:100%;white-space:pre-wrap;min-height:180px;font-family:inherit}.adbox{padding:27px;border:1px solid #e2e7f4;background:#fff;border-radius:22px}.adv{padding:26px}.insight{padding:28px;background:#f3f6ff}.muted{color:#66748d}.fine{color:#758199;font-size:12px}.foot{background:#edf1fa;padding:32px 0;font-size:13px}.chapter-detail{max-width:850px}.chapter-detail h1{font-size:38px}.chapter-detail h2{font-size:22px;margin-top:30px}.chapter-detail li{margin:8px 0}.resources{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.download{padding:12px 14px;border:1px solid #dde5f2;border-radius:10px;background:#fff}.tag{display:inline-block;padding:4px 9px;border-radius:8px;background:#edf3ff;color:#4565b2;font-size:11px;font-weight:700}@media(max-width:880px){.hero-grid,.toolgrid{grid-template-columns:1fr}.cards,.grid4{grid-template-columns:repeat(2,1fr)}.days{grid-template-columns:repeat(3,1fr)}.nav{align-items:flex-start;padding-top:15px;padding-bottom:15px;flex-direction:column}.nav-links{gap:12px}.hero{padding:64px 0}.resources{grid-template-columns:repeat(2,1fr)}}@media(max-width:540px){.wrap{padding:0 17px}.section{padding:44px 0}.hero h1{font-size:44px}.cards,.grid4,.fields,.resources{grid-template-columns:1fr}.days{grid-template-columns:repeat(2,1fr)}.hero-panel{padding:19px}.chapter-detail h1{font-size:30px}}
/* Persistent author contacts, clearly marked as commercial. */
.contact-ribbon{background:#edf3ff;border-bottom:1px solid #d9e4f7}
.contact-ribbon-inner{display:flex;align-items:center;gap:14px;min-height:60px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
.contact-ribbon-label{font-size:12px;color:#64748b;white-space:nowrap}
.contact-company{display:flex;align-items:baseline;gap:9px;font-size:14px}
.contact-company strong{color:#244ca5}
.contact-company span{font-size:12px;color:#435b88}
.contact-wechat{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:14px}
.contact-wechat strong{color:#193d91}
.wechat-copy{background:#325fd4;border:1px solid #325fd4;color:#fff;padding:5px 10px;border-radius:8px;font-size:12px;font-weight:700}
.wechat-copy:hover,.wechat-copy:focus-visible{background:#1e4cb6}
.wechat-feedback:not(:empty){font-size:12px;color:#375992}
@media(max-width:620px){.contact-ribbon-inner{align-items:flex-start;gap:8px 16px}.contact-ribbon-label{flex-basis:100%}.contact-company{flex-wrap:wrap}.contact-wechat{flex-basis:100%}}