:root{--paper:#faf9f5;--ink:#182e49;--muted:#627084;--blue:#244bd8;--green:#447f70;--line:#e4e6e7;--radius:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.75 "PingFang SC","Microsoft YaHei",system-ui,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #e4ad41;outline-offset:5px}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.35}h2{font-size:38px;letter-spacing:-1px}.container{width:min(1120px,calc(100% - 64px));margin:auto}.skip-link{position:fixed;left:16px;top:-70px;background:var(--ink);color:white;padding:10px;z-index:10}.skip-link:focus{top:12px}.site-header{border-bottom:1px solid var(--line);background:rgba(250,249,245,.97);position:sticky;top:0;z-index:5}.header-inner{min-height:88px;display:flex;align-items:center;gap:32px;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;font-weight:750;font-size:21px;white-space:nowrap;line-height:1.35}.brand small{display:block;color:var(--muted);font-size:10px;font-weight:400;letter-spacing:3px;margin-top:5px}.brand-symbol{display:grid;place-items:center;background:var(--blue);color:white;width:43px;height:43px;border-radius:13px 13px 13px 3px;font-size:23px}.header-inner nav{display:flex;gap:26px;font-size:14px}.header-inner nav a:hover,.footer-links a:hover{color:var(--blue)}.header-entry{border-bottom:1px solid var(--ink);padding:4px 0;font-size:13px;white-space:nowrap}.header-entry span{margin-left:10px}.hero{display:grid;grid-template-columns:1.18fr 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.18s,background .18s}.button:hover{transform:translateY(-2px)}.primary{background:var(--blue);color:white;box-shadow:0 6px 16px #244bd818}.primary:hover{background:#1d3eac}.text-link{font-size:13px;border-bottom:1px solid #a5aeba}.hero-note{font-size:11px;color:var(--muted);margin-top:16px}.hero-tags{display:flex;gap:20px;margin-top:28px;font-size:12px;color:var(--green)}.hero-tags span:before{content:"✓";margin-right:6px}.hero-visual{position:relative;padding:27px 13px 31px}.visual-orbit{position:absolute;border-radius:50%;pointer-events:none}.orbit-one{width:330px;height:330px;background:#e7eee7;left:-10px;top:68px}.orbit-two{width:230px;height:230px;border:1px dashed #c5d1d7;right:-13px;bottom:-8px}.learning-sheet{position:relative;background:white;border:1px solid #d9e0e5;border-radius:18px;box-shadow:0 24px 54px #1833500c;transform:rotate(2deg);padding:25px 26px 18px}.sheet-top{display:flex;align-items:center;gap:11px;font-size:16px;font-weight:700}.sheet-top small{display:block;font-size:7px;color:var(--muted);letter-spacing:1.5px;margin-top:4px;font-weight:400}.sheet-icon{color:var(--blue);font-size:30px}.example-label{margin-left:auto;border:1px solid var(--line);color:var(--muted);font-size:9px;padding:2px 7px;border-radius:4px;font-weight:400}.book-art{margin:14px 0 4px}.book-art svg{display:block;width:100%;height:146px}.sheet-path{list-style:none;padding:0;margin:4px 0}.sheet-path li{display:flex;align-items:center;gap:14px;border-top:1px solid #edf0f3;padding:13px 0}.sheet-path li>span{color:var(--blue);font:11px/1.4 ui-monospace,monospace;background:#edf2fc;border-radius:50%;width:32px;height:32px;display:grid;place-items:center}.sheet-path b{font-size:13px}.sheet-path small{display:block;font-size:10px;color:var(--muted);margin-top:2px}.sheet-path i{margin-left:auto;color:var(--green);font-size:16px;font-style:normal}.sheet-bottom{font-size:10px;text-align:center;color:var(--muted);padding-top:12px;border-top:1px solid #edf0f3}.floating-tag{position:absolute;z-index:1;display:flex;align-items:center;gap:9px;white-space:nowrap;background:#fff;box-shadow:0 9px 23px #182e4910;border:1px solid var(--line);border-radius:8px;font-size:11px;padding:11px 16px}.floating-tag span{font-size:16px;color:var(--green)}.tag-top{top:5px;right:2px;transform:rotate(-5deg)}.tag-bottom{bottom:2px;left:-12px;transform:rotate(-3deg)}.intro-strip{background:#eef0e9;border-top:1px solid #e4e8df;border-bottom:1px solid #e4e8df}.intro-strip .container{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:21px;padding-bottom:21px}.intro-strip span{font-size:13px;font-weight:700}.intro-strip p{font-size:13px;color:#5a6b62}.intro-strip i{padding:0 19px;color:#97a294;font-style:normal}.section{padding-top:90px;padding-bottom:90px}.section-heading{position:relative;margin-bottom:43px}.section-heading>p:last-child{position:absolute;right:0;bottom:4px;font-size:14px;color:var(--muted)}.section-heading .eyebrow{margin-bottom:15px}.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.service-card{border:1px solid #dde3e6;border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;min-height:353px}.diagnosis{background:#edf2ff}.practice{background:#f7f0e5}.growth{background:#edf3ec}.card-number{font:10px/1.6 ui-monospace,monospace;letter-spacing:1px;color:var(--muted)}.card-icon{font-size:35px;color:var(--blue);line-height:1.6;margin:16px 0 8px}.practice .card-icon{color:#a27637}.growth .card-icon{color:var(--green)}.service-card h3{font-size:19px;margin-bottom:15px}.service-card>p{font-size:13px;color:var(--muted);line-height:1.95;margin-bottom:23px}.service-card a,.card-footnote{margin-top:auto;font-size:11px}.service-card a{font-weight:650}.service-card a span{float:right}.card-footnote{color:var(--muted)}.subjects-section{background:#182e49;color:white;padding:72px 0}.subjects-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.subjects-copy .eyebrow{color:#a8cbbc}.subjects-copy>p:not(.eyebrow){max-width:380px;font-size:13px;color:#c2ccd7;margin-top:20px;line-height:1.95}.subject-tabs{display:flex;gap:10px;margin-top:27px}.subject-tabs button{background:transparent;border:1px solid #5f738b;color:#d4dde8;border-radius:8px;padding:10px 27px;cursor:pointer;font-size:14px;transition:background .15s}.subject-tabs button[aria-selected=true]{background:#edf1e9;border-color:#edf1e9;color:#19324c;font-weight:700}.subjects-copy .subject-note{font-size:10px!important;color:#a6b6c6!important}.subject-panel{border:1px solid #5c6e84;border-radius:17px;background:#223b57;padding:31px 34px;min-height:375px}.subject-index{font:10px/1.7 ui-monospace,monospace;letter-spacing:2px;color:#b5d4c5}.subject-panel h3{font-size:26px;margin-top:28px}.subject-panel>p{color:#c4cfdb;font-size:13px;margin-top:17px;line-height:1.95;min-height:76px}.subject-panel ul{padding:0;list-style:none;margin:19px 0 25px}.subject-panel li{font-size:12px;padding:5px 0;color:#e4eaf0}.subject-panel li:before{content:"↗";margin-right:10px;color:#b5d4c5}.subject-footer{border-top:1px solid #476079;padding-top:16px;display:flex;justify-content:space-between;font-size:9px;color:#b5c6d8}.subject-footer>span:last-child{font-size:16px;line-height:1}.journey-head{display:flex;justify-content:space-between;align-items:end;gap:24px}.secondary{border:1px solid #b1bccc;color:var(--ink)}.journey-steps{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:42px;margin:47px 0 0}.journey-steps li{border-top:1px solid #bfc8d3;padding-top:24px}.journey-steps span{font:25px/1.5 ui-monospace,monospace;color:#8da0b7}.journey-steps h3{font-size:18px;margin:17px 0 12px}.journey-steps p{font-size:13px;color:var(--muted);line-height:1.9}.faq-section{display:grid;grid-template-columns:1fr 1.5fr;gap:68px;padding-top:40px;padding-bottom:82px}.faq-list details{border-bottom:1px solid var(--line);padding:19px 0}.faq-list details:first-child{border-top:1px solid var(--line)}.faq-list summary{cursor:pointer;font-size:14px;font-weight:600;padding-right:10px}.faq-list details p{color:var(--muted);font-size:12px;line-height:2;margin-top:14px;max-width:96%}.start-section{background:var(--blue);border-radius:24px;display:flex;align-items:center;justify-content:space-between;padding:45px 50px;color:white;gap:30px}.start-copy .eyebrow{color:#d5dcff;margin-bottom:14px}.start-copy h2{font-size:35px}.start-copy>p:last-child{font-size:12px;color:#d5dcff;margin-top:16px}.start-actions{display:flex;flex-direction:column;align-items:center;gap:20px}.light{color:var(--blue);background:var(--paper);min-width:235px}.start-actions>a:last-child{font-size:11px;color:#e0e6ff}.site-footer{padding-top:55px;padding-bottom:23px}.footer-top{display:flex;gap:25px;align-items:center;padding-bottom:37px;flex-wrap:wrap}.footer-top .brand{font-size:18px}.footer-top>p{font-size:11px;color:var(--muted);flex:1}.footer-links{display:flex;gap:18px;font-size:11px;color:var(--muted)}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:18px;color:var(--muted);font-size:10px}
@media(min-width:1400px){.hero{min-height:690px}.hero h1{font-size:56px}}
@media(max-width:1000px){.header-inner{gap:18px}.header-inner nav{gap:15px;font-size:12px}.hero{gap:26px;padding-top:55px;padding-bottom:65px}.hero h1{font-size:40px}.hero-visual{padding:20px 8px 25px}.learning-sheet{padding:22px 19px 18px}.sheet-top{font-size:14px}.orbit-one{width:250px;height:250px}.service-card{padding:23px}.service-card h3{font-size:17px}.subjects-layout{gap:40px}.section-heading>p:last-child{position:static;margin-top:20px}.footer-top>p{flex-basis:45%}.footer-links{margin-left:auto}}
@media(max-width:720px){.container{width:calc(100% - 36px)}.header-inner{min-height:104px;flex-wrap:wrap;padding:15px 0 12px;gap:10px}.brand{font-size:18px}.brand-symbol{width:36px;height:36px;font-size:20px}.brand small{font-size:8px}.header-entry{margin-left:auto;font-size:11px}.header-inner nav{order:3;width:100%;justify-content:space-between;padding-top:5px;gap:9px}.hero{grid-template-columns:1fr;padding-top:42px;padding-bottom:40px;gap:35px;min-height:0}.hero h1{font-size:38px;letter-spacing:-1.5px}.hero .eyebrow{font-size:11px;margin-bottom:16px}.hero-intro{font-size:13px;margin-top:23px;max-width:none}.hero-actions{gap:16px;margin-top:23px}.button{padding:13px 20px;font-size:13px;gap:24px}.text-link{font-size:11px}.hero-note{font-size:10px}.hero-tags{gap:16px;font-size:10px;margin-top:22px}.hero-visual{width:min(380px,100%);margin:auto;padding:22px 12px 26px}.learning-sheet{padding:23px 24px 17px}.sheet-top{font-size:15px}.book-art svg{height:134px}.tag-top{right:7px}.tag-bottom{left:0}.orbit-two{right:0}.intro-strip .container{display:block;padding-top:17px;padding-bottom:17px}.intro-strip span{font-size:12px}.intro-strip p{font-size:10px;margin-top:5px}.intro-strip i{padding:0 9px}.section{padding-top:57px;padding-bottom:57px}h2{font-size:29px}.eyebrow{font-size:9px;letter-spacing:1.4px;margin-bottom:15px}.section-heading{margin-bottom:29px}.section-heading>p:last-child{font-size:12px;margin-top:16px}.services-grid{grid-template-columns:1fr;gap:14px}.service-card{min-height:0;padding:25px}.card-icon{font-size:29px;margin:8px 0}.service-card h3{font-size:20px}.service-card>p{font-size:13px;margin-bottom:18px}.service-card a,.card-footnote{font-size:12px}.subjects-section{padding:48px 0}.subjects-layout{grid-template-columns:1fr;gap:26px}.subjects-copy>p:not(.eyebrow){max-width:none}.subject-tabs button{padding:9px 29px}.subject-panel{padding:26px;min-height:350px}.subject-panel h3{font-size:24px;margin-top:23px}.subject-panel>p{min-height:0}.journey-head{display:block}.journey-head .button{margin-top:22px}.journey-steps{grid-template-columns:1fr;gap:28px;margin-top:32px}.journey-steps li{padding-top:16px;display:grid;grid-template-columns:48px 1fr;column-gap:12px}.journey-steps span{grid-row:1/3;font-size:23px}.journey-steps h3{font-size:17px;margin:3px 0 8px}.journey-steps p{grid-column:2;font-size:12px}.faq-section{grid-template-columns:1fr;gap:25px;padding-top:10px;padding-bottom:50px}.faq-list summary{font-size:13px}.start-section{padding:32px 27px;display:block;border-radius:18px}.start-copy h2{font-size:29px}.start-actions{align-items:start;margin-top:29px;gap:17px}.light{min-width:220px}.site-footer{padding-top:38px}.footer-top{display:block;padding-bottom:23px}.footer-top>p{margin-top:17px}.footer-links{gap:17px;flex-wrap:wrap;margin-top:21px}.footer-bottom{font-size:9px;gap:14px}.subject-note{max-width:100%}}
@media(max-width:360px){.hero h1{font-size:33px}.hero-tags{gap:10px}.intro-strip i{padding:0 4px}.subject-tabs button{padding:9px 23px}.header-entry{font-size:10px}.learning-sheet{padding:18px}.hero-visual{padding-left:8px;padding-right:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.subject-tabs button{transition:none}.button:hover{transform:none}}