/* Scheme C: shared website presentation. Access and billing remain unchanged. */
.c-home-scene>img.c-scene-fallback{display:none!important}
.c-home-heading h1,.c-home-intro strong,.cast-heading h1,.cast-controls h2,.cast-reading h2,.cast-reading h3,.c-feature-band h2,.c-entry h2,.page-title,.section-title{font-family:var(--serif)}
.header-tools .header-action{display:inline-flex;align-items:center;justify-content:center}
:root{--paper:#f5f6f7;--paper-strong:#fff;--paper-muted:#eaf0f1;--ink:#172c30;--ink-soft:#65777b;--line:#d5dddf;--line-strong:#b6c6c9;--jade:#255e64;--jade-soft:#e0ebeb;--gold:#ae8d58;--gold-soft:#f0ede6;--indigo:#25444a;--max:1320px}
html{scroll-padding-top:96px}body{background:var(--paper);color:var(--ink);letter-spacing:0}::selection{background:#c7dddd;color:#172c30}button,input,select,textarea,.primary-nav,.header-tools,.eyebrow,.overline,.footer-records{font-family:var(--sans);letter-spacing:0}a,button,input,select,textarea{ -webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--jade);outline-offset:5px}button:disabled{cursor:wait;opacity:.55}
.site-header{height:80px;background:rgb(245 246 247 / .94);border-bottom:1px solid var(--line);backdrop-filter:blur(18px);transition:height .3s,box-shadow .3s;position:sticky;top:0;z-index:40}.header-inner{height:100%;max-width:1440px;margin:auto;padding:0 40px;gap:32px}.brand-link{gap:12px;flex-shrink:0;text-decoration:none;color:var(--ink)}.brand-mark{width:39px;height:39px;border:0!important;border-radius:0!important;display:block;flex:none;background:url('/assets/yibu-mark.svg') center/contain no-repeat;font-size:0!important;color:transparent!important}.brand-word{font-size:27px;font-weight:600}.brand-latin{font-size:10px;color:var(--ink-soft);margin-left:2px}.primary-nav{gap:28px;align-items:center}.primary-nav>a{position:relative;font-size:14px;padding:29px 0 25px;border-bottom:0;color:var(--ink-soft);white-space:nowrap}.primary-nav>a:after{position:absolute;content:"";bottom:18px;left:0;right:0;height:1px;background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .28s}.primary-nav>a:hover,.primary-nav>a[aria-current=page]{color:var(--ink)}.primary-nav>a:hover:after,.primary-nav>a[aria-current=page]:after{transform:scaleX(1)}.header-tools{gap:20px}.header-product-menu{display:none}.header-action{color:var(--jade);font-size:13px;border:1px solid var(--line);padding:9px 16px;border-radius:4px}.development-link-status{font-family:var(--sans);font-size:9px;padding:2px 4px;border:1px solid var(--line);margin-left:5px;border-radius:2px;vertical-align:middle;color:var(--ink-soft)}.is-scrolled .site-header{box-shadow:0 4px 25px #172c3006}.nav-toggle{border:0;min-width:42px;min-height:42px}
.button,.button-secondary{min-height:47px;padding:13px 22px;border-radius:4px;font-family:var(--sans);font-size:14px;font-weight:500;position:relative;overflow:hidden;isolation:isolate;transition:color .28s,border-color .28s,transform .2s,box-shadow .28s;display:inline-flex;align-items:center;justify-content:center;gap:13px}.button{background:var(--ink);border:1px solid var(--ink);color:white}.button-secondary{background:transparent;border:1px solid var(--line-strong);color:var(--ink)}.button:before,.button-secondary:before{content:"";position:absolute;inset:0;background:var(--jade);z-index:-1;transform:translateY(102%);transition:transform .32s cubic-bezier(.2,.7,.3,1)}.button:hover:before,.button-secondary:hover:before{transform:translateY(0)}.button:hover,.button-secondary:hover{color:white;border-color:var(--jade);box-shadow:0 5px 18px #255e6412;transform:translateY(-1px)}.button:active,.button-secondary:active{transform:scale(.98)}.button-row{gap:12px;flex-wrap:wrap}.c-arrow{font-size:19px;line-height:1;transition:transform .25s}.button:hover .c-arrow,.button-secondary:hover .c-arrow{transform:translateX(4px)}
.page-shell,.section-inner{max-width:var(--max)}.page-hero{padding-top:64px;padding-bottom:64px;min-height:0}.page-title{font-size:52px;line-height:1.28;letter-spacing:0;font-weight:500}.section-title{font-size:34px;line-height:1.45;font-weight:500;letter-spacing:0}.lead{font-size:17px;line-height:1.9;color:var(--ink-soft)}.eyebrow{color:var(--jade);font-size:11px;line-height:1.5;margin-bottom:18px}.content-section{padding:76px 0;background:transparent;border-top:1px solid var(--line)}.section-head{gap:40px;margin-bottom:34px}.section-head p{font-size:15px;line-height:1.9;max-width:480px}.about-grid,.device-grid{gap:0}.about-item,.device-item{background:transparent;box-shadow:none;border:0;border-radius:0;border-left:1px solid var(--line);padding:28px 36px}.about-item:first-child,.device-item:first-child{border-left:0;padding-left:0}.about-item h3,.device-item h3{font-size:24px;font-weight:500}.about-item p,.device-item p,.principle-copy{color:var(--ink-soft);line-height:1.95}.site-footer-v2{background:#eaf0f1;border-top:1px solid var(--line);color:var(--ink);padding-top:58px}.site-footer-v2 a,.site-footer-v2 p,.footer-records{color:var(--ink-soft)}.site-footer-v2 a:hover{color:var(--jade)}.footer-brand{font-size:30px}.footer-grid h2{color:var(--ink);font-weight:500}.footer-records{border-color:var(--line);font-size:11px}.search-field{border-radius:4px;background:#fff;border-color:var(--line);font-family:var(--sans)}.hex-card{background:transparent;border-radius:4px;border-color:var(--line);transition:background .2s,transform .25s,border-color .2s}.hex-card:hover{background:white;transform:translateY(-4px);border-color:var(--jade)}.hex-card-name{font-weight:500}.hex-dialog{background:var(--paper-strong);border:1px solid var(--line);border-radius:8px;box-shadow:0 24px 100px #172c3024}.hex-dialog::backdrop{background:#172c3055;backdrop-filter:blur(5px)}.dialog-close{background:var(--paper-muted);border:0;color:var(--ink);border-radius:4px}.detail-title{font-weight:500}.course-body{line-height:2}.course-body h2,.course-body h3{font-weight:500}.course-card,.academy-course-card{border-radius:6px!important;box-shadow:none!important}.course-hero,.academy-hero{background:transparent}.development-hero{background:#eef1f2;color:var(--ink)}.development-hero:before{opacity:.1;filter:grayscale(1)}.development-hero .lead{color:var(--ink-soft)}.development-hero .eyebrow{color:var(--jade)}
.c-home-hero{position:relative;min-height:640px;height:calc(100svh - 118px);max-height:920px;overflow:hidden;border-bottom:1px solid var(--line)}.c-home-heading{position:relative;z-index:2;max-width:1400px;margin:0 auto;padding:55px 40px 0;display:grid;grid-template-columns:1fr 1fr auto;align-items:center;gap:40px;pointer-events:none}.c-home-heading a{pointer-events:auto}.c-home-heading .eyebrow{margin:0 0 10px}.c-home-heading h1{font-size:72px;font-weight:500;margin:0;line-height:1.1}.c-home-intro{border-left:1px solid var(--line-strong);padding-left:28px;max-width:420px}.c-home-intro strong{font-size:24px;font-weight:400;display:block;margin-bottom:10px}.c-home-intro p{font-size:14px;color:var(--ink-soft);line-height:1.9;margin:0}.c-home-scene{position:absolute;inset:130px 0 20px;touch-action:pan-y;cursor:grab}.c-home-scene:active{cursor:grabbing}.c-home-scene canvas{display:block;width:100%;height:100%}.c-scene-fallback{position:absolute;left:50%;top:51%;width:min(560px,56vw);aspect-ratio:1.28;transform:translate(-50%,-50%) rotateX(58deg) rotateZ(-9deg);transform-style:preserve-3d;border:1px solid rgb(37 94 100 / .12);background:linear-gradient(135deg,rgb(244 247 245 / .92),rgb(229 237 231 / .78));box-shadow:0 35px 80px rgb(23 44 48 / .08);overflow:visible}.c-scene-fallback:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgb(37 94 100 / .07) 1px,transparent 1px),linear-gradient(0deg,rgb(37 94 100 / .06) 1px,transparent 1px);background-size:72px 72px}.c-fallback-ring{position:absolute;inset:-18%;border:1px dashed rgb(37 94 100 / .22);border-radius:50%;transform:translateZ(-3px)}.c-fallback-floor{position:absolute;inset:13% 11%;border:13px solid rgb(23 44 48 / .18);background:rgb(255 255 255 / .6);box-shadow:inset 0 0 0 1px rgb(23 44 48 / .1)}.c-fallback-room{position:absolute;border:8px solid rgb(23 44 48 / .26);background:rgb(255 255 255 / .22)}.c-fallback-room.room-a{left:20%;top:20%;width:31%;height:31%}.c-fallback-room.room-b{right:17%;top:18%;width:30%;height:34%}.c-fallback-room.room-c{right:17%;bottom:18%;width:30%;height:26%}.c-fallback-layer{position:absolute;border-radius:999px;filter:blur(1px);opacity:.75;mix-blend-mode:multiply}.c-fallback-layer.layer-qi{left:25%;top:28%;width:35%;height:16%;background:linear-gradient(90deg,rgb(32 190 150 / .1),rgb(32 190 150 / .54));animation:fallbackFlow 4.8s ease-in-out infinite}.c-fallback-layer.layer-sun{right:19%;top:19%;width:34%;height:50%;background:linear-gradient(125deg,rgb(255 199 86 / .55),rgb(255 199 86 / 0));clip-path:polygon(0 0,100% 0,46% 100%)}.c-fallback-layer.layer-wind{left:42%;bottom:22%;width:40%;height:10%;background:linear-gradient(90deg,rgb(56 186 242 / 0),rgb(56 186 242 / .52),rgb(56 186 242 / 0));animation:fallbackWind 3.8s ease-in-out infinite}.c-home-scene[data-ready=true] .c-scene-fallback{display:none}.c-scene-toolbar{position:absolute;right:40px;bottom:34px;z-index:3;display:flex;gap:6px}.c-scene-toolbar button{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);background:#ffffffdf;border-radius:4px;color:var(--ink);cursor:pointer}.c-scene-toolbar button:hover,.c-scene-toolbar button[aria-pressed=true]{background:var(--ink);color:white}.c-scene-toolbar svg{width:17px;height:17px}.c-scene-caption{position:absolute;bottom:38px;left:40px;font:11px var(--sans);color:var(--ink-soft);z-index:2;display:flex;gap:18px;align-items:center}.c-scene-caption:before{content:"";width:28px;height:1px;background:var(--gold)}.c-entry-strip{max-width:1400px;margin:auto;padding:0 40px;display:grid;grid-template-columns:repeat(3,1fr)}.c-entry{padding:35px 26px;border-right:1px solid var(--line);text-decoration:none;color:var(--ink);position:relative;transition:background .25s}.c-entry:first-child{padding-left:0}.c-entry:last-child{border-right:0}.c-entry small{font:10px var(--sans);color:var(--gold)}.c-entry h2{font-size:24px;font-weight:500;margin:10px 0}.c-entry p{font-size:13px;color:var(--ink-soft);margin:0;line-height:1.8}.c-entry>span{position:absolute;right:22px;top:49px;transition:transform .3s}.c-entry:hover>span{transform:translate(4px,-4px)}.c-feature-band{display:grid;grid-template-columns:1fr 1fr;gap:76px;align-items:center}.c-feature-band h2{font-size:42px;line-height:1.45;margin:10px 0 23px;font-weight:500}.c-feature-band p{font-size:15px;line-height:2;color:var(--ink-soft)}.c-hex-art{height:320px;display:flex;justify-content:center;align-items:center;gap:35px;position:relative}.c-hex-art:before,.c-hex-art:after{content:"";position:absolute;width:260px;height:260px;border:1px solid var(--line);border-radius:50%}.c-hex-art:after{width:310px;height:310px;border-style:dashed;opacity:.5}.c-art-lines{display:flex;flex-direction:column;gap:15px;z-index:1}.c-art-lines i{width:120px;height:10px;background:var(--jade);animation:lineBreathe 6s ease-in-out infinite;animation-delay:var(--delay)}.c-art-lines i:nth-child(even){background:linear-gradient(90deg,var(--jade) 43%,transparent 43%,transparent 57%,var(--jade) 57%)}@keyframes fallbackFlow{0%,100%{transform:translateX(-4%) scaleX(.9);opacity:.5}50%{transform:translateX(12%) scaleX(1.08);opacity:.82}}@keyframes fallbackWind{0%,100%{transform:translateX(-10%);opacity:.35}50%{transform:translateX(10%);opacity:.72}}@keyframes lineBreathe{0%,100%{transform:scaleX(.88);opacity:.65}50%{transform:scaleX(1);opacity:1}}.c-editor-shot{width:100%;aspect-ratio:1.25;object-fit:cover;object-position:top;border:1px solid var(--line);border-radius:4px}
[data-reveal]{transition:opacity .75s,transform .75s cubic-bezier(.2,.7,.3,1)}
@media(min-width:1500px){.c-home-heading{padding-top:65px}.c-home-scene{inset:130px 6% 25px}}
@media(max-width:1100px){.header-inner{padding:0 24px;gap:20px}.primary-nav{gap:17px}.brand-latin{display:none}.c-home-heading{gap:24px}.c-home-heading h1{font-size:62px}.c-home-intro strong{font-size:21px}.c-feature-band{gap:32px}.c-feature-band h2{font-size:34px}}
@media(max-width:820px){.site-header{height:68px}.header-inner{padding:0 20px}.brand-word{font-size:23px}.brand-mark{width:34px;height:34px}.header-tools{margin-left:auto;gap:10px}.primary-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper-strong);padding:16px 24px;box-shadow:0 12px 20px #172c3012;gap:0}.nav-open .primary-nav{display:grid;grid-template-columns:1fr 1fr}.primary-nav>a{padding:17px 8px;display:block;border-bottom:1px solid var(--line)}.primary-nav>a:after{display:none}.nav-toggle{display:flex}.page-title{font-size:38px}.page-hero{padding-top:40px;padding-bottom:40px}.section-title{font-size:28px}.section-head{gap:20px}.content-section{padding:48px 0}.c-home-hero{height:calc(100svh - 100px);min-height:590px;max-height:830px}.c-home-heading{padding:32px 24px 0;grid-template-columns:1fr auto;gap:24px}.c-home-heading h1{font-size:55px}.c-home-intro{grid-column:1/-1;grid-row:2;border:0;padding:0;max-width:440px}.c-home-intro strong{font-size:21px}.c-home-intro p{font-size:13px}.c-home-heading .button{min-height:43px;padding:11px 16px}.c-home-scene{inset:190px -12% 34px}.c-scene-caption{left:24px;bottom:29px;font-size:10px;gap:10px}.c-scene-toolbar{right:20px;bottom:20px;gap:4px}.c-scene-toolbar button{width:34px;height:34px}.c-entry-strip{padding:0 24px}.c-entry{padding:27px 14px}.c-entry h2{font-size:20px}.c-entry p{font-size:12px}.c-entry>span{position:static}.c-feature-band{grid-template-columns:1fr;gap:24px}.c-feature-band h2{font-size:32px}.c-hex-art{height:270px}.c-editor-shot{aspect-ratio:1.55}.about-item,.device-item{padding:20px}.header-action{padding:8px 12px}.site-footer-v2{padding-top:38px}}
@media(max-width:480px){.c-home-hero{min-height:590px}.c-home-heading h1{font-size:49px}.c-home-heading{gap:21px}.c-home-intro strong{font-size:20px}.c-home-scene{inset:218px -20% 47px}.c-home-intro p{max-width:310px}.c-scene-caption{bottom:74px}.c-scene-toolbar{left:24px;right:auto}.c-entry-strip{grid-template-columns:1fr;padding:0 24px}.c-entry{padding:22px 0;border-right:0;border-bottom:1px solid var(--line)}.c-entry:last-child{border:0}.c-entry h2{display:inline-block;margin:0 12px 8px 0}.c-entry small{margin-right:12px}.c-entry>span{position:absolute;top:25px;right:4px}.about-grid,.device-grid{grid-template-columns:1fr}.about-item,.device-item{border-left:0;border-top:1px solid var(--line);padding:26px 0}.page-title{font-size:34px}.button-row .button,.button-row .button-secondary{max-width:100%;white-space:normal}.footer-grid{gap:28px}.c-feature-band h2{font-size:29px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}[data-reveal]{opacity:1!important;transform:none!important}}
.zhaijing-hero .button-secondary{color:#fff;border-color:#c8d2d1;background:transparent}
.zhaijing-hero .button-secondary:hover,.zhaijing-hero .button-secondary:focus-visible{color:#172c30;background:#f4f7f7;border-color:#fff}
.zhaijing-hero .button-secondary:before{content:none}
.zhaijing-hero .text-link{color:#f4f7f7;text-decoration:underline;text-underline-offset:5px}
.zhaijing-hero .text-link:hover{color:#fff;text-decoration-thickness:2px}
.zhaijing-hero .button-row a:focus-visible{outline:2px solid #fff;outline-offset:5px}