*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f7f8f6;color:#193d32;font:17px/1.85 -apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif}h1,h2,h3,p,figure{margin:0}h1,h2,h3{line-height:1.3}p{margin:16px 0}a{color:inherit;text-underline-offset:4px}a:hover{color:#8d3b55}a:focus-visible,summary:focus-visible{outline:3px solid #8d3b55;outline-offset:5px}img{display:block;max-width:100%;height:auto}.petal-skip{position:absolute;top:-70px;background:white;padding:10px}.petal-skip:focus{top:4px;z-index:5}.petal-top{max-width:1180px;margin:auto;padding:25px 28px;display:flex;justify-content:space-between;align-items:center;gap:25px}.petal-brand{text-decoration:none;font-size:25px;font-weight:750}.petal-brand span{font-size:17px}.petal-top nav{display:flex;gap:26px;font-size:15px}.petal-top nav a{text-decoration:none}.petal-label{text-transform:uppercase;letter-spacing:.08em;font-size:13px;font-weight:700;color:#70505a}.petal-banner{max-width:1240px;margin:auto}.petal-title{text-align:center;max-width:820px;margin:auto;padding:34px 28px 32px}.petal-title h1{font-size:clamp(30px,4.5vw,52px);letter-spacing:-.025em}.petal-title h1 span{font-weight:450}.petal-title>p:not(.petal-label){max-width:690px;margin:20px auto;color:#476258}.petal-button{display:inline-block;background:#193d32;color:#fff;border-radius:28px;padding:10px 24px;text-decoration:none;font-size:16px}.petal-button:hover{background:#304f44;color:white}.petal-banner>img{width:100%;height:275px;object-fit:cover}.petal-sequence,.petal-roles,.petal-network,.petal-library,.petal-faq{max-width:1100px;margin:0 auto;padding:48px 28px}.petal-sequence h2,.petal-library h2{font-size:29px}.petal-sequence ol{display:flex;list-style:none;padding:0;margin:27px 0 0;gap:35px}.petal-sequence li{flex:1;padding-top:15px;border-top:2px solid #d9aeba}.petal-sequence strong{font-size:21px}.petal-sequence p{font-size:16px;color:#476258}.petal-roles{border-top:1px solid #d5dfd6;border-bottom:1px solid #d5dfd6;display:grid;grid-template-columns:1fr 1.5fr;gap:60px}.petal-roles h2,.petal-network h2{font-size:31px}.petal-roles p:first-child,.petal-network p:first-child{margin-top:0}.petal-network{display:grid;grid-template-columns:1fr 1.5fr;gap:60px;background:#ebf0eb;margin-top:34px}.petal-essays{margin-top:25px;display:grid;gap:20px}.petal-essay{text-decoration:none;display:block;padding:25px 30px;background:white;border-radius:0 28px 0 0;border:1px solid #dce3dd}.petal-essay h3{font-size:23px}.petal-essay h3 a{text-decoration:none}.petal-essay h3 a:hover{text-decoration:underline}.petal-essay p{font-size:16px;color:#476258;margin-bottom:0}.petal-faq{padding-top:15px}.petal-faq h2{font-size:29px;margin-bottom:25px}details{border-bottom:1px solid #d5dfd6;padding:16px 0}summary{cursor:pointer;font-weight:650}details p{color:#476258}.petal-bottom{margin:25px auto 0;border-top:1px solid #d5dfd6;max-width:1180px;padding:30px 28px 45px;display:flex;justify-content:space-between;gap:35px;align-items:start;font-size:14px}.petal-bottom strong{font-size:22px}.petal-bottom p{max-width:600px;color:#476258}.petal-reading{max-width:820px;margin:35px auto 65px;padding:0 28px}.petal-intro{margin:25px 0 28px}.petal-intro h1{font-size:clamp(29px,4vw,40px);overflow-wrap:anywhere}.petal-intro p{color:#476258}.petal-reading h2{font-size:25px;margin-top:32px}.petal-prose p{margin:19px 0}.petal-date,.petal-crumb{font-size:14px;color:#476258}.petal-source{font-size:14px;padding:17px;background:#ebf0eb}.petal-reading .petal-essays{margin-bottom:30px}@media(max-width:650px){body{font-size:16px}.petal-top{display:block;padding:20px}.petal-top nav{margin-top:12px;gap:20px;font-size:14px}.petal-title{padding:17px 20px 27px;text-align:left}.petal-title h1{font-size:32px}.petal-banner>img{height:190px}.petal-sequence,.petal-roles,.petal-network,.petal-library,.petal-faq{padding:32px 20px}.petal-sequence ol{display:block;margin-top:20px}.petal-sequence li{margin-top:18px}.petal-roles,.petal-network{display:block}.petal-roles h2{margin-bottom:20px}.petal-network{margin-top:15px}.petal-network h2 br{display:none}.petal-network h2{margin-bottom:20px;font-size:27px}.petal-essay{padding:20px}.petal-essay h3{font-size:21px}.petal-bottom{display:block;padding:25px 20px}.petal-reading{padding:0 20px;margin-top:25px}.petal-reading h2{font-size:23px}.petal-intro h1{font-size:29px}.petal-title>p:not(.petal-label){margin:16px 0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}