/* E500 v0.3 · Lime Sage + Cloud Cream · High legibility */
:root{--bg:#F9FBF6;--paper:#FFFFFF;--ink:#233A2B;--ink2:#334C3D;--muted:#627365;--rust:#397F4B;--rust-dark:#285B36;--cream:#E9F4DA;--line:#D9E5D5;--sage:#73A76A;--sage-dark:#39744B;--shade:#EFF6EA;--shadow:0 12px 40px rgba(37,75,44,.07)}
html{scroll-padding-top:110px}body{background:#FAFCF7;color:var(--ink);font-size:15px}p{overflow-wrap:break-word}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #92C96E;outline-offset:3px}::selection{background:#D0EDAF;color:#203A2B}
.grain{display:none}.site-header{height:76px;background:rgba(255,255,255,.96);box-shadow:0 3px 20px rgba(44,92,49,.035);border-bottom:1px solid var(--line)}.brand-symbol span,.footer-brand span{color:#D6754F}.brand-suffix,.brand-suffix small{color:#536B54}.top-nav{background:#F1F7ED;border-color:#E1EBDD}.nav-link{color:#4E6753;font-size:12px}.nav-link.active,.nav-link:hover{color:#254C33;background:#FFFFFF}.header-cta,.btn-dark{background:#2D7545;border-color:#2D7545;color:#fff}.header-cta:hover,.btn-dark:hover{background:#225D36;border-color:#225D36}.btn-ghost{color:#2B7044}.btn-ghost:hover{background:#EAF5E6}.nav-faq{display:flex;align-items:center;padding:9px 13px;font-size:12px;font-weight:700;text-decoration:none;border-radius:25px;color:#3C6144}.nav-faq:hover{background:#fff;color:#246239}
.value-signal{background:#E4F4D4;border-bottom:1px solid #CEE4BD}.value-signal-inner{min-height:44px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:#44664C;padding-top:5px;padding-bottom:5px}.value-signal strong{color:#244D30;font-weight:850}.value-signal a{margin-left:auto;text-decoration:none;font-weight:800;color:#2A6B3B}.signal-glyph{color:#5C9E43;font-size:17px}
.hero{min-height:0;padding-top:58px;padding-bottom:38px;gap:50px}.hero-copy h1{font-size:clamp(42px,4.6vw,65px);line-height:1.13;margin:20px 0 24px;max-width:760px}.hero-copy h1 em,.interior-intro h1 em,.section-heading h2 em,.method-band h2 em,.feedback-aside h2 em{color:#3F8B58}.hero-copy>p{color:#516A59;font-size:17px;line-height:1.75;max-width:640px}.hero-copy>p strong{color:#245F36}.eyebrow,.overline,.num-label{color:#387B48}.dot{background:#7BBF6C}.hero-fine{color:#607663}.tiny-chip{color:#2A6841;border-color:#A6D294;background:#EDF8E8}.hero-art{background:linear-gradient(145deg,#F4FBEF,#EDF6E9);border-color:#D1E5C9;box-shadow:0 24px 55px rgba(70,125,68,.09)}.art-top,.art-bottom{color:#527257}.divider-stroke{background:#B9D8B4}.thesis-strip{padding:27px 0}.thesis-strip p{color:#3C5943}.thesis-strip strong{color:#276F3D}.text-button{color:#2D7946}.research-note{color:#6B806E}
.core-value{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding-bottom:37px}.core-value article{border:1px solid #D9E8D5;background:#fff;border-radius:14px;min-height:128px;padding:22px;display:flex;align-items:flex-start;gap:17px;box-shadow:0 8px 24px rgba(45,91,48,.035)}.value-icon{background:#DAF1CD;color:#2B753B;border:1px solid #C6E6B9;border-radius:9px;padding:6px 8px;font-weight:900;font-size:12px;line-height:1}.core-value h3{margin:0 0 7px;font-size:14px;color:#28553A}.core-value p{margin:0;font-size:13px;line-height:1.7;color:#526B57}.core-value b{color:#244F33}
.section-block{padding-top:67px}.frontier-card,.panel,.mechanism-card,.timeline-list{background:#fff;border-color:#DCE7D7;box-shadow:0 6px 22px rgba(40,84,43,.035)}.frontier-card:hover{border-color:#A8CEA3;box-shadow:0 18px 42px rgba(47,95,50,.11)}.frontier-card::before{background:#61B566}.card-sector,.card-id,.mechanism-code{color:#337F48!important}.card-bottom strong,.era-years,.mini-head{color:#287247!important}.filter-row{border-color:var(--line)}.pill{border-color:#CADFC6;color:#4B7153;background:#fff;border-radius:8px}.pill.selected,.pill:hover{background:#2F7D49;color:#fff;border-color:#2F7D49}.method-band{background:#EFF8E9!important;border-color:#D5E8CF!important}.method-items div{border-color:#BCDDBA!important}.method-items h3{color:#2C6040}.method-items p{color:#586C5B}
.interior-intro{padding-top:58px;padding-bottom:31px}.interior-intro h1{font-size:clamp(38px,4.4vw,61px)}.lab-result .live-dot{color:#397C4B}.panel-top{color:#377447}.lab-result .simulation-graphic{background:#F4FAF0}.bar-fill.demand{background:#5EAA5C}.bar-fill.supply{background:#D8A26E}.bottom-explain{background:#EAF5E3;color:#3F6147}.bottom-explain strong{color:#245738}.era-item:hover,.era-item.active{background:#EAF7E2}.era-item.active{box-shadow:inset 4px 0 0 #4B9D58}.era-item .number{color:#39834A}.history-notice,.detail-chain{background:#F0F8EA}.history-notice strong{color:#397A48}.feedback-panel textarea,.select{border-color:#CBDECA;background:#fff}.rating-options span{color:#46704E;border-color:#C7DCC3}.rating-options input:checked+span{background:#2D7545;border-color:#2D7545}.form-status{color:#2C713D}.feedback-export button{color:#2B7041}.detail-dialog{background:#fff}.detail-chain .chain-step{border-color:#81B675}.chain-step::before{background:#3F9A55}.detail-chain strong{color:#2D7946}.detail-warning{color:#68766C}
/* FAQ: 2 vertical columns on desktop, collapsible summaries */
.faq-section{background:linear-gradient(160deg,#FFFFFF 0%,#F4FAEF 100%);border-top:1px solid #D9E8D4;padding:74px 0 78px;scroll-margin-top:105px}.faq-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:25px}.faq-heading h2{font-size:clamp(29px,3vw,42px);line-height:1.22;letter-spacing:-.04em;margin:12px 0}.faq-heading h2 em{color:#41844D;font-family:Georgia,serif;font-weight:400}.faq-heading p{color:#637967;margin:0;font-size:13px}.faq-hint{font-size:11px;color:#55725D}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;align-items:start}.faq-column{display:grid;gap:11px;align-content:start}.faq-item{border:1px solid #D4E4D0;background:white;border-radius:12px;box-shadow:0 8px 20px rgba(38,79,40,.03);overflow:hidden}.faq-item[open]{border-color:#A9D3A4;background:#FBFEF9}.faq-item summary{display:grid;grid-template-columns:29px 1fr 21px;gap:11px;align-items:center;cursor:pointer;list-style:none;padding:18px 20px}.faq-item summary::-webkit-details-marker{display:none}.faq-num{color:#6A9C65;font-weight:900;font-size:11px}.faq-question{font-size:14px;font-weight:800;line-height:1.46;color:#2D4835}.faq-plus{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#EAF5E4;color:#327549;font-size:20px;font-weight:500}.faq-item[open] .faq-plus{transform:rotate(45deg);background:#D6EECB}.faq-answer{margin:0 20px 19px 60px;color:#536A57;line-height:1.75;font-size:13px;max-width:55ch}.faq-last{margin-top:25px;border:1px solid #BFDFB4;background:#E9F8DF;border-radius:13px;padding:18px 22px;display:flex;align-items:center;gap:13px;color:#476D49;font-size:13px}.faq-last strong{color:#28653C;white-space:nowrap}
/* Footer is the project release dashboard rather than decorative small print */
.site-footer{background:#F0F8EA;border-top:1px solid #CEE3C6;padding:42px 0 22px;color:#2C4834}.footer-header{display:flex;justify-content:space-between;gap:24px;align-items:center}.footer-brand{font-size:39px;line-height:1}.footer-brand small{font-family:system-ui;font-size:10px;letter-spacing:.12em;font-weight:800;color:#658069}.footer-header p{font-size:13px;margin:13px 0 0;max-width:630px;color:#54705A}.footer-release-meta{display:flex;flex-direction:column;gap:7px;align-items:flex-end}.release-sync{font-size:10px;color:#678168}.release-gate{padding:9px 13px;background:#D9EFCE;color:#27653C;border:1px solid #BFDFB5;border-radius:7px;font-size:11px;font-weight:900;max-width:300px;text-align:center}.release-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:11px;margin-top:24px}.release-stat-grid>div{background:#fff;border:1px solid #D6E7D0;padding:15px 16px;border-radius:9px;display:flex;flex-direction:column;gap:4px;min-height:81px}.release-stat-grid span{color:#6B8A71;font-size:10px;font-weight:850;letter-spacing:.09em}.release-stat-grid strong{color:#284B33;font-size:13px;line-height:1.3;overflow-wrap:anywhere}.release-progress{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px;margin-top:13px}.progress-card{padding:17px 16px;border:1px solid #D1E5CD;background:#FFF;border-radius:10px;min-height:148px}.progress-card.done{border-top:3px solid #66B871}.progress-card.doing{border-top:3px solid #79A3C9}.progress-card.next{border-top:3px solid #E0A663}.progress-card.later{border-top:3px solid #9F9EBA}.progress-step{font-size:10px;font-weight:900;letter-spacing:.075em;color:#3C6948}.progress-card p{font-size:12px;color:#536D59;line-height:1.7;margin:11px 0 0}.footer-management{display:flex;justify-content:space-between;gap:24px;margin-top:23px;padding:18px 0;border-top:1px solid #D4E4CE;border-bottom:1px solid #D4E4CE;font-size:12px;color:#57735B;line-height:1.8}.footer-management strong{color:#365A3D}.footer-management-links{display:flex;align-items:start;flex-direction:column;gap:4px;white-space:nowrap}.footer-management-links a{color:#287645;font-weight:800;text-decoration:none}.footer-management-links a:hover{text-decoration:underline}.footer-note{display:flex;gap:22px;justify-content:space-between;border:0;margin-top:0;padding-top:18px;color:#58725B;font-size:11px;line-height:1.7}.footer-note span:first-child{white-space:nowrap;font-weight:800;color:#315D3D}
@media(max-width:1120px){.site-header{gap:13px}.nav-faq{padding:8px}.hero{gap:27px}.hero-copy h1{font-size:clamp(40px,4.7vw,57px)}.core-value article{padding:18px}.core-value p{font-size:12px}}
@media(max-width:800px){.site-header{height:auto;min-height:69px}.hero{padding-top:43px}.hero-copy h1{font-size:clamp(42px,7vw,61px)}.core-value{grid-template-columns:1fr;gap:9px}.core-value article{min-height:0;padding:15px}.faq-section{padding:52px 0}.faq-grid{gap:10px}.faq-item summary{padding:14px}.faq-answer{margin-left:53px}.footer-header{align-items:flex-start}.release-progress{grid-template-columns:repeat(2,1fr)}.faq-last{display:block}.faq-last strong{display:block;margin-bottom:6px}}
@media(max-width:560px){.value-signal-inner{font-size:11px;gap:5px}.value-signal a{width:100%;margin-left:0}.site-header{padding:11px 14px}.nav-faq{font-size:10px;padding:7px}.brand-suffix{display:none}.hero{gap:22px}.hero-copy h1{font-size:clamp(39px,10vw,54px)}.hero-copy>p{font-size:15px}.core-value{padding-bottom:22px}.faq-heading{display:block}.faq-hint{display:block;margin-top:10px}.faq-grid{grid-template-columns:1fr}.faq-answer{margin-right:15px}.release-stat-grid{grid-template-columns:repeat(2,1fr)}.release-progress{grid-template-columns:1fr}.progress-card{min-height:0}.footer-header{display:block}.footer-release-meta{margin-top:18px;align-items:flex-start}.footer-management{display:block}.footer-management-links{margin-top:16px}.footer-note{display:block}.footer-note span:last-child{display:block;margin-top:6px}.art-top{font-size:8px}}
/* Mobile navigation: avoid wrapped / illegible last item */
@media(max-width:560px){
 .top-nav{display:flex;justify-content:flex-start;align-items:center;overflow-x:auto;scrollbar-width:thin;white-space:nowrap;width:100%;-webkit-overflow-scrolling:touch;gap:2px}
 .top-nav .nav-link,.top-nav .nav-faq{flex:0 0 auto!important;white-space:nowrap;font-size:11px;padding:10px 13px;line-height:1.35}
 .top-nav .nav-faq{border-radius:30px}
}