@charset "UTF-8";
:root{--blue:#1265ec;--navy:#102c50;--ink:#132b48;--muted:#56687c;--line:#dce4ee;--pale:#f3f7fc;--white:#fff;--max:1200px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);font-synthesis:none;scroll-behavior:smooth}
*{box-sizing:border-box}body{margin:0;background:var(--white);font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;display:block}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.3;font-weight:650}h1{font-size:clamp(2.5rem,4.6vw,4rem);letter-spacing:-.05em}h2{font-size:clamp(1.8rem,3vw,2.5rem);letter-spacing:-.04em}h3{font-size:1.35rem}p{color:var(--muted)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #e6a933;outline-offset:5px}.wrap{width:min(var(--max),calc(100% - 80px));margin:auto}.skip{position:absolute;top:-90px;left:20px;background:var(--navy);color:white;padding:10px 20px;z-index:100}.skip:focus{top:10px}.site-header{background:white;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{height:94px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand img{width:203px;height:auto}.desktop-nav{display:flex;gap:28px;align-items:center;font-size:15px}.desktop-nav a{padding:7px 0}.desktop-nav a:hover,.desktop-nav a[aria-current=page]{color:var(--blue)}.header-contact{border:1px solid var(--navy);padding:9px 18px!important;border-radius:3px}.mobile-nav{display:none}main{min-height:65vh}.eyebrow{display:flex;align-items:center;gap:12px;font-size:14px;font-weight:600;letter-spacing:.09em;color:var(--blue);margin-bottom:24px}.eyebrow:before{content:"";width:26px;height:2px;background:currentColor}.hero{background:linear-gradient(110deg,#f5f8fc 0%,#edf4fd 100%);padding:68px 0 0;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.07fr 1fr;gap:58px;align-items:center}.hero h1 span{color:var(--blue);display:block;margin-top:10px}.hero-copy>p{font-size:18px;max-width:530px;margin-top:26px}.hero-copy .definition{font-size:15px;color:#536982;line-height:1.9;border-left:2px solid #b7cdee;padding-left:16px;margin-top:23px}.actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;background:var(--blue);color:white;min-height:50px;padding:12px 22px;border:1px solid var(--blue);border-radius:3px;font-size:15px;font-weight:600;transition:background .2s}.button:hover{background:#084fc2}.button.secondary{background:transparent;border-color:#b4c1d1;color:var(--ink)}.button.secondary:hover{background:#e3edfa}.text-link{font-size:15px;color:var(--blue);font-weight:600;display:inline-flex;gap:16px;align-items:center}.text-link:hover{text-decoration:underline}.hero-visual{position:relative;background:var(--navy);padding:0;box-shadow:0 20px 50px #214f8017}.hero-image{width:100%;aspect-ratio:1.42;object-fit:cover}.hero-caption{padding:24px 28px;color:white}.hero-caption small{color:#abc5e6;letter-spacing:.08em;font-size:12px}.hero-caption strong{display:block;font-size:23px;font-weight:550;margin-top:6px}.hero-caption p{font-size:14px;color:#c7d5e7;margin-top:6px}.hero-rail{display:grid;grid-template-columns:repeat(4,1fr);margin-top:57px;border-top:1px solid #ccd9e9}.hero-rail div{padding:22px 20px;border-right:1px solid #ccd9e9;display:flex;align-items:center;gap:16px}.hero-rail div:first-child{padding-left:0}.hero-rail div:last-child{border:0}.hero-rail small{font-size:12px;color:#677b96}.hero-rail strong{font-size:16px;font-weight:500}.section{padding:88px 0;scroll-margin-top:20px}.section.soft{background:var(--pale)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:38px}.section-head .eyebrow{margin-bottom:16px}.section-head p{max-width:470px;font-size:16px;margin-top:15px}.section-head>.text-link{flex-shrink:0}.service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.service-card{border:1px solid var(--line);padding:30px 32px;background:white;display:flex;flex-direction:column;position:relative;border-top:3px solid #cfddf0;transition:border-color .2s,transform .2s}.service-card:hover{border-color:var(--blue);transform:translateY(-3px)}.service-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px;margin-bottom:20px}.service-no{font-size:31px;font-weight:350;color:#9eb3ce}.service-card h3{font-size:24px;margin-bottom:12px}.service-card p{max-width:480px;line-height:1.85}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}.tags span{font-size:13px;background:#f0f5fc;color:#415d7e;padding:4px 10px}.service-card .text-link{margin-top:auto;padding-top:8px}.method-panel{display:grid;grid-template-columns:1fr 1.15fr;gap:70px;align-items:start}.method-panel .intro{font-size:18px;margin-top:24px}.method-list{border-top:1px solid #becddd}.method-item{display:grid;grid-template-columns:48px 1fr;gap:15px;padding:21px 0;border-bottom:1px solid #becddd}.method-item .num{font-size:13px;color:var(--blue);padding-top:4px}.method-item h3{font-size:19px;margin-bottom:6px}.method-item p{font-size:15px}.feature-teachers{display:grid;grid-template-columns:1fr 1fr;gap:28px}.feature-teacher{display:grid;grid-template-columns:42% 1fr;min-height:315px;background:var(--pale);overflow:hidden}.feature-teacher img{width:100%;height:100%;object-fit:cover;object-position:50% 12%}.teacher-info{padding:32px 25px;display:flex;flex-direction:column;align-items:start;justify-content:center}.teacher-info .role{color:var(--blue);font-size:13px;margin-bottom:12px}.teacher-info h3{font-size:27px}.teacher-info p{font-size:14px;margin-top:16px}.teacher-info .specialty{font-size:15px;color:var(--ink);margin-top:10px;font-weight:500}.proof-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:20px}.proof-grid figure{margin:0}.proof-grid img{width:100%;height:230px;object-fit:cover}.proof-grid figcaption{font-size:14px;padding:13px 0;color:var(--muted)}.small-note{font-size:13px;color:#6a7c90;margin-top:16px}.faq-list{border-top:1px solid var(--line)}details.faq{border-bottom:1px solid var(--line)}.faq summary{list-style:none;padding:24px 42px 24px 0;font-size:18px;font-weight:550;position:relative;cursor:pointer}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";position:absolute;right:8px;top:22px;font-size:24px;color:var(--blue);font-weight:300}.faq[open] summary:after{content:"−"}.faq p{padding:0 50px 25px 0;max-width:900px;font-size:16px}.contact-band{background:var(--navy);color:white;padding:64px 0}.contact-inner{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:60px}.contact-band .eyebrow{color:#a2c6ff;margin-bottom:18px}.contact-band p{color:#c2d1e4;margin-top:20px;font-size:16px}.contact-box{padding:26px 30px;border-left:1px solid #526985}.contact-box>a.email{color:white;font-size:clamp(1rem,1.8vw,1.35rem);word-break:break-word}.contact-box .label{font-size:13px;color:#abc3e0;margin-bottom:10px}.contact-box .button{margin-top:20px;background:white;color:var(--navy);border-color:white}.contact-box p{font-size:13px;margin-top:12px}.site-footer{padding:42px 0 24px}.footer-top{display:flex;justify-content:space-between;gap:30px;align-items:start}.footer-brand{font-size:21px;font-weight:650}.footer-top p{font-size:14px;margin-top:8px}.footer-links{display:flex;gap:24px;flex-wrap:wrap;font-size:14px}.footer-bottom{margin-top:30px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;color:#65768a;font-size:12px}.page-hero{padding:42px 0 60px;background:var(--pale);border-bottom:1px solid var(--line)}.breadcrumbs{display:flex;gap:10px;color:var(--muted);font-size:13px;margin-bottom:36px;flex-wrap:wrap}.breadcrumbs a:hover{color:var(--blue)}.page-hero h1{font-size:clamp(2.1rem,4vw,3.2rem);line-height:1.35;max-width:950px;letter-spacing:-.04em}.page-hero .lead{font-size:19px;max-width:800px;margin-top:22px}.page-hero .eyebrow{margin-bottom:16px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:68px;align-items:start}.article-body h2{font-size:28px;margin:42px 0 18px}.article-body h2:first-child{margin-top:0}.article-body h3{font-size:20px;margin:26px 0 12px}.article-body p{margin-bottom:18px;line-height:2}.article-body ul,.article-body ol{padding-left:24px;color:var(--muted)}.article-body li{padding-left:6px;margin:10px 0}.article-aside{border:1px solid var(--line);padding:25px;background:#f9fbfe}.article-aside h2{font-size:18px;margin-bottom:18px}.article-aside a{display:block;border-top:1px solid var(--line);padding:14px 0;font-size:14px}.article-aside a:hover{color:var(--blue)}.article-aside .button{display:flex;margin-top:20px;font-size:14px;padding:9px 12px}.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:24px}.info-card{padding:24px;border:1px solid var(--line)}.info-card h3{margin:0 0 12px;font-size:19px}.info-card p{font-size:15px;margin:0}.article-note{border-left:3px solid var(--blue);background:var(--pale);padding:20px 24px;margin:25px 0;color:var(--muted);font-size:15px}.all-teachers{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.teacher-card{border:1px solid var(--line);background:white}.teacher-card img{width:100%;aspect-ratio:1.08;object-fit:cover;object-position:50% 15%}.teacher-card .teacher-info{padding:26px;min-height:250px;justify-content:start}.teacher-card .teacher-info h3{font-size:25px}.teacher-card .teacher-info p{font-size:15px}.teacher-card.dai img{object-position:50% 8%}.about-definition{font-size:22px!important;color:var(--ink);line-height:1.9!important}.table-wrap{overflow-x:auto;margin:24px 0}table{border-collapse:collapse;width:100%;min-width:540px;font-size:15px}th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--pale);font-weight:600}td{color:var(--muted)}.no-wrap{white-space:nowrap}
.hero-image,.teacher-card img{height:auto}
@media(min-width:1450px){.hero{padding-top:85px}.hero-grid{gap:75px}.hero-rail{margin-top:75px}}
@media(max-width:1050px){.wrap{width:calc(100% - 48px)}.desktop-nav{gap:18px}.brand img{width:170px}.header-inner{height:80px}.hero-grid{gap:30px}.hero-copy>p{font-size:16px}.feature-teachers{gap:20px}.feature-teacher{grid-template-columns:40% 1fr}.teacher-info{padding:22px 18px}.teacher-info h3{font-size:24px}.proof-grid img{height:190px}.method-panel{gap:40px}.article-layout{gap:36px;grid-template-columns:minmax(0,1fr) 235px}.all-teachers{gap:20px}.contact-inner{gap:25px}}
@media(max-width:780px){.wrap{width:calc(100% - 40px)}.header-inner{height:76px;gap:15px}.brand img{width:168px}.desktop-nav{display:none}.mobile-nav{display:block}.mobile-nav summary{font-size:14px;cursor:pointer;padding:8px 14px;border:1px solid var(--line);list-style:none;border-radius:3px}.mobile-nav summary::-webkit-details-marker{display:none}.mobile-nav[open]>div{position:absolute;top:75px;left:0;right:0;background:white;border-bottom:1px solid var(--line);padding:16px 22px;box-shadow:0 20px 30px #102c5012}.mobile-nav a{display:block;padding:10px}.hero{padding-top:38px}.hero-grid{grid-template-columns:1fr;gap:30px}.hero h1{font-size:clamp(2.4rem,7.9vw,3.4rem)}.hero-copy>p{max-width:100%;font-size:17px}.hero-copy .definition{font-size:14px}.hero-visual{display:grid;grid-template-columns:1.2fr 1fr}.hero-image{height:100%;aspect-ratio:1.2}.hero-caption{padding:22px 18px}.hero-caption strong{font-size:20px}.hero-caption p{font-size:13px}.hero-rail{grid-template-columns:repeat(2,1fr);margin-top:34px}.hero-rail div{padding:16px!important;gap:10px}.hero-rail div:nth-child(even){border-right:0}.hero-rail div:nth-child(-n+2){border-bottom:1px solid #ccd9e9}.hero-rail strong{font-size:15px}.section{padding:56px 0}.section-head{display:block;margin-bottom:28px}.section-head>.text-link{margin-top:20px}.eyebrow{font-size:12px;margin-bottom:19px}.service-grid{gap:16px}.service-card{padding:22px}.service-card h3{font-size:21px}.service-card p{font-size:15px}.service-no{font-size:26px}.service-top{font-size:12px}.tags span{font-size:12px}.method-panel{grid-template-columns:1fr;gap:30px}.method-panel .intro{font-size:16px}.feature-teachers{grid-template-columns:1fr;gap:20px}.feature-teacher{min-height:290px;grid-template-columns:39% 1fr}.teacher-info{padding:26px}.teacher-info h3{font-size:27px}.teacher-info p{font-size:15px}.proof-grid{grid-template-columns:1fr 1fr;gap:16px}.proof-grid figure:first-child{grid-column:1/-1}.proof-grid figure:first-child img{height:auto;aspect-ratio:1.85}.proof-grid img{height:auto;aspect-ratio:1.5}.proof-grid figcaption{font-size:13px}.faq summary{font-size:16px;padding-top:20px;padding-bottom:20px}.faq p{font-size:15px;padding-right:20px}.contact-inner{grid-template-columns:1fr;gap:26px}.contact-band{padding:48px 0}.contact-box{border-left:0;border-top:1px solid #526985;padding:24px 0 0}.contact-box>a.email{font-size:21px}.footer-top,.footer-bottom{flex-direction:column}.footer-links{gap:17px}.page-hero{padding:28px 0 40px}.page-hero .lead{font-size:17px}.breadcrumbs{margin-bottom:26px}.article-layout{grid-template-columns:1fr;gap:36px}.article-body h2{font-size:24px}.all-teachers{grid-template-columns:repeat(2,1fr);gap:18px}.teacher-card .teacher-info{padding:22px}.teacher-card .teacher-info .specialty{font-size:14px}.teacher-card .teacher-info p{font-size:14px}.about-definition{font-size:19px!important}}
@media(max-width:480px){.service-grid{grid-template-columns:1fr}.hero-visual{grid-template-columns:1fr}.hero-image{aspect-ratio:1.72}.hero-caption{padding:19px 22px}.hero-caption strong{font-size:21px}.hero-caption small{font-size:12px}.hero-copy>p{font-size:16px}.actions{gap:12px}.button{padding:11px 18px;gap:16px}.feature-teacher{min-height:280px;grid-template-columns:41% 1fr}.feature-teacher img{object-position:50% 8%}.teacher-info{padding:22px 16px}.teacher-info .specialty{font-size:14px}.teacher-info p{font-size:14px}.info-grid,.all-teachers{grid-template-columns:1fr}.teacher-card img{aspect-ratio:1.2;object-position:50% 18%}.teacher-card .teacher-info{min-height:0;padding:24px}.teacher-card .teacher-info p{font-size:15px}.contact-box>a.email{font-size:18px}.hero-rail strong{font-size:14px}.hero-rail div{padding:14px 10px!important}.hero-rail small{font-size:12px}}
@media(max-width:480px){.hero h1 span{font-size:clamp(1.6rem,7.6vw,2.1rem);letter-spacing:-.035em}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}