:root{
  --ink:#442b34;--text:#59464d;--muted:#806d74;--line:#ead9de;
  --paper:#fffaf9;--surface:#fffefd;--soft:#fbf0f3;--accent:#b64f72;
  --accent-dark:#853650;--deep:#5c3040;--shadow:0 12px 32px rgba(96,48,64,.07);--max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",YuGothic,"Noto Sans JP",sans-serif;line-height:1.85;letter-spacing:.015em}
img{max-width:100%;height:auto}a{color:inherit}.wrap{width:min(var(--max),calc(100% - 48px));margin:auto}.narrow{width:min(820px,calc(100% - 48px));margin:auto}
.skip{position:absolute;left:-9999px;top:auto}.skip:focus{left:16px;top:16px;background:#fff;padding:10px 14px;z-index:1000;border:1px solid var(--line)}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,250,249,.96);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:82px}
.brand{display:flex;align-items:center;gap:13px;min-width:0;text-decoration:none}
.brand-mark{width:44px;height:44px;display:grid;place-items:center;color:var(--accent-dark);background:#fff;border:1px solid #dcaabd;border-radius:50%;font-family:"Yu Mincho",YuMincho,"Hiragino Mincho ProN",serif;font-size:21px;font-weight:700}
.brand strong{display:block;max-width:280px;color:var(--ink);font-family:"Yu Mincho",YuMincho,"Hiragino Mincho ProN",serif;font-size:17px;line-height:1.45;letter-spacing:.07em}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:.04em}
.global-nav{display:flex;align-items:center;gap:23px}.global-nav a{position:relative;text-decoration:none;font-size:14px;font-weight:600}
.global-nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:1px;background:var(--accent);transform:scaleX(0);transition:.2s}.global-nav a:hover::after,.global-nav a[aria-current="page"]::after{transform:scaleX(1)}
.global-nav .nav-cta{color:#fff;background:var(--accent-dark);padding:10px 17px;border-radius:4px}.menu-button{display:none;border:1px solid #d7bfc7;background:#fffaf9;color:var(--ink);padding:8px 12px;border-radius:3px;font:inherit;font-weight:600}
.notice-bar{background:#f7e8ed;border-bottom:1px solid #ebd3dc;font-size:12px;color:#684e57}.notice-bar .wrap{padding:9px 0}

.hero{position:relative;overflow:hidden;background:var(--soft);padding:92px 0 88px;border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;left:0;top:0;width:7px;height:100%;background:var(--accent)}
.hero::after{content:"同窓会";position:absolute;right:-18px;bottom:-78px;color:rgba(182,79,114,.055);font-family:"Yu Mincho",YuMincho,serif;font-size:210px;font-weight:700;line-height:1;white-space:nowrap}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:68px;align-items:center}
.eyebrow{margin:0 0 14px;color:var(--accent-dark);font-size:13px;font-weight:700;letter-spacing:.16em}
h1,h2{font-family:"Yu Mincho",YuMincho,"Hiragino Mincho ProN",serif;color:var(--ink);font-weight:600}h1{margin:0 0 24px;font-size:clamp(39px,5vw,64px);line-height:1.35;letter-spacing:.045em}h2{margin:0 0 18px;font-size:clamp(27px,3vw,39px);line-height:1.45;letter-spacing:.04em}h3{margin:0 0 10px;color:var(--ink);font-size:20px;line-height:1.55}
.lead{max-width:720px;color:#624f56;font-size:17px;line-height:2}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border:1px solid transparent;border-radius:4px;text-decoration:none;font-size:14px;font-weight:700;transition:.2s}.button:hover{transform:translateY(-1px)}
.button.primary{color:#fff;background:var(--accent-dark);border-color:var(--accent-dark);box-shadow:0 8px 18px rgba(133,54,80,.14)}.button.primary:hover{background:#702b43}.button.secondary{color:var(--accent-dark);background:#fff;border-color:#c98da2}.button.ghost{color:var(--ink);background:transparent;border-color:#d7bfc7}.button.disabled{cursor:not-allowed;opacity:.58;box-shadow:none}.button.disabled:hover{background:var(--accent-dark);transform:none}
.hero-side{display:grid;gap:18px}.hero-card{position:relative;background:rgba(255,254,253,.92);border:1px solid #dfbcc9;padding:30px 30px 26px;box-shadow:var(--shadow)}.hero-card::before{content:"";position:absolute;left:14px;top:14px;width:26px;height:1px;background:var(--accent)}.hero-card h2{margin-top:20px;font-size:25px}
.tag{display:inline-block;padding:5px 10px;color:var(--accent-dark);background:#f8e7ed;border-radius:2px;font-size:12px;font-weight:700}.event-summary{margin:18px 0 0}.event-summary div{display:grid;grid-template-columns:76px 1fr;padding:10px 0;border-top:1px solid var(--line)}.event-summary dt{color:var(--muted);font-size:13px;font-weight:700}.event-summary dd{margin:0;color:var(--ink);font-weight:600}
.mini-panel{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #dfbcc9;border-bottom:1px solid #dfbcc9}.mini-stat{padding:14px 12px;background:transparent;border-right:1px solid #dfbcc9;text-decoration:none}.mini-stat:last-child{border-right:0}.mini-stat strong{display:block;color:var(--ink);font-size:15px}.mini-stat span{color:var(--muted);font-size:11px}.mini-stat[href]:hover{background:rgba(255,255,255,.5)}

.section{padding:82px 0}.section.alt{background:#fcf3f5;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:34px;padding-bottom:17px;border-bottom:1px solid #d9b8c3}.section-head p{margin-bottom:6px}.section-head h2{margin-bottom:8px}.section-sub{max-width:740px;margin:0;color:var(--muted)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.feature-card{position:relative;padding:28px 30px;background:transparent;border-right:1px solid var(--line)}.feature-card:last-child{border-right:0}.feature-card .number{display:block;margin-bottom:16px;color:var(--accent);font-family:Georgia,serif;font-size:14px;font-style:italic}.feature-card p{margin:0;color:#6a575e}
.center{text-align:center;margin-top:24px}.text-link,.rss-link{color:var(--accent-dark);font-weight:700;text-decoration-thickness:1px;text-underline-offset:4px}
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.story-card{background:var(--surface);border:1px solid var(--line);padding:30px 32px;box-shadow:var(--shadow)}.story-card .icon{width:42px;height:42px;display:grid;place-items:center;margin-bottom:18px;color:var(--accent-dark);border:1px solid #dbaabc;border-radius:50%;font-family:"Yu Mincho",YuMincho,serif;font-size:17px}.story-card p{margin-bottom:0}
.timeline{display:grid;border-top:1px solid var(--line)}.timeline-item{display:grid;grid-template-columns:116px 1fr;gap:24px;align-items:start;padding:24px 10px;border-bottom:1px solid var(--line)}.timeline-item .date{display:inline-block;color:var(--accent-dark);font-family:Georgia,serif;font-size:13px;font-style:italic}.timeline-item h3{font-size:18px}.timeline-item p{margin:0;color:#6b585f}
.info-band{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:30px;border:1px solid var(--line)}.info-box{padding:22px;background:#fff;border-right:1px solid var(--line)}.info-box:last-child{border-right:0}.info-box strong{display:block;margin-bottom:6px;color:var(--ink)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.news-card{background:#fff;border:1px solid var(--line);padding:25px 26px;box-shadow:var(--shadow)}.news-card time{color:var(--accent-dark);font-family:Georgia,serif;font-size:13px}.news-card h3{margin:12px 0 8px;font-size:19px}.news-card p{margin:0 0 12px;color:#6c5960}
.callout{display:flex;justify-content:space-between;gap:34px;align-items:center;background:var(--deep);color:#fff;padding:42px 46px;box-shadow:var(--shadow)}.callout h2{color:#fff}.callout .eyebrow{color:#efb8ca}.callout p{max-width:700px;color:#f3e6ea}.callout .button.primary{background:#f3ceda;border-color:#f3ceda;color:var(--deep)}.callout .button.secondary{background:transparent;color:#fff;border-color:#c898a8}

.page-hero{position:relative;padding:78px 0 56px;background:var(--soft);border-bottom:1px solid var(--line)}.page-hero::before{content:"";position:absolute;left:0;top:0;bottom:0;width:7px;background:var(--accent)}.page-hero h1{font-size:clamp(37px,5vw,56px)}.breadcrumbs{margin-bottom:14px;color:var(--muted);font-size:12px}
.prose p,.prose li{color:#604d54;font-size:16px}.prose h2{margin-top:44px;padding-bottom:10px;border-bottom:1px solid #dcb9c5;font-size:29px}.prose ul{padding-left:1.2em}
.history-timeline{margin:30px 0 42px;border-top:1px solid var(--line)}.history-item{display:grid;grid-template-columns:150px 1fr;gap:28px;padding:24px 8px;border-bottom:1px solid var(--line)}.history-item time{color:var(--accent-dark);font-family:Georgia,"Yu Mincho",YuMincho,serif;font-size:14px;font-weight:700;letter-spacing:.04em}.history-item h3{margin:-3px 0 6px;font-family:"Yu Mincho",YuMincho,"Hiragino Mincho ProN",serif;font-size:19px}.history-item p{margin:0;font-size:15px}
.status-box,.note,.important-box{margin:22px 0 32px;padding:22px 24px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);box-shadow:var(--shadow)}.note{background:#fdf7f9;border-left-color:#a86c81}.important-box{background:#fffaf5;border-left-color:#9b6845}.note h2,.important-box h2{margin-top:0}
.detail-table{display:grid;gap:0;margin:24px 0 38px;border-top:1px solid var(--line)}.detail-table div{display:grid;grid-template-columns:130px 1fr;align-items:center;padding:15px 18px;background:#fff;border-bottom:1px solid var(--line)}.check-list li{margin-bottom:8px}
.registration-box{display:flex;align-items:center;justify-content:space-between;gap:26px;margin:28px 0 38px;padding:26px 28px;background:#fcf0f4;border:1px solid #dfbcc9}.registration-box p{margin:5px 0 0}.registration-box .button{flex:0 0 auto}.organizer-signature{margin-top:46px;padding-top:24px;border-top:1px solid var(--line);text-align:right}.organizer-signature p{margin-bottom:6px}.organizer-signature strong{color:var(--ink)}
.short-link-box{margin:-18px 0 38px;padding:22px 26px;text-align:center;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}.short-link-box span{display:block;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.08em}.short-link-box strong{display:block;margin:8px 0 4px;color:var(--accent-dark);font-family:Georgia,"Yu Mincho",YuMincho,serif;font-size:clamp(21px,4vw,30px);letter-spacing:.025em;overflow-wrap:anywhere}.short-link-box p{margin:0;color:var(--muted);font-size:13px}
.compact-page-hero{padding-bottom:42px}.embedded-form-section{padding-top:48px}.form-page-wrap{width:min(820px,calc(100% - 48px))}.embedded-form-shell{overflow:hidden;scroll-margin-top:98px;background:#f6e9ee;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}.embedded-form-shell iframe{display:block;width:100%;height:2350px;border:0;transition:height .25s ease}.embedded-form-shell.is-response-view iframe{height:clamp(520px,78svh,720px)}.form-help-box{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;margin-top:24px;padding:22px 26px;background:#fff;border:1px solid var(--line)}.form-help-box p{flex:1 1 100%;margin:0;text-align:center;color:var(--muted);font-size:13px}
.form-wrap{width:min(800px,calc(100% - 48px));margin:auto}.form-card{background:#fff;border:1px solid var(--line);padding:34px 38px;box-shadow:var(--shadow)}.form-intro{margin-bottom:28px;padding:18px 20px;background:#fcf2f5;border-left:4px solid var(--accent)}.form-intro p{margin-bottom:0}.field{margin:0 0 26px;padding:0;border:0}.field>label,.field legend{display:block;margin-bottom:8px;color:var(--ink);font-weight:700}
input[type=text],input[type=email],textarea,select{width:100%;padding:13px 14px;color:var(--text);background:#fffdfd;border:1px solid #d7bcc5;border-radius:2px;font:inherit}input[type=text]:focus,input[type=email]:focus,textarea:focus,select:focus{outline:3px solid rgba(182,79,114,.13);border-color:var(--accent)}
.radio{display:block;padding:9px 0;font-weight:500!important}.radio input{margin-right:8px;accent-color:var(--accent-dark)}.required{color:#a23e59;font-size:11px}.optional{color:var(--muted);font-size:11px;font-weight:600}.help,.small{color:var(--muted);font-size:13px}.consent{display:flex;gap:10px;align-items:flex-start;margin:22px 0;padding:16px;background:#fcf5f7;border:1px solid var(--line)}.consent input{margin-top:7px;accent-color:var(--accent-dark)}.submit{width:100%;border:0;padding:15px}.hp-field{position:absolute;left:-9999px}
.success,.error{margin-bottom:20px;padding:18px 20px;border-radius:2px;box-shadow:var(--shadow)}.success{background:#f3faf6;border:1px solid #c8e3d3}.error{background:#fff3f3;border:1px solid #edcaca}

.board-section{padding-top:64px}.board-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.7fr);gap:46px;align-items:start}.board-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px;padding-bottom:14px;border-bottom:1px solid #d9b8c3}.board-heading h2{margin:0}.post-count{color:var(--muted);font-size:13px}.board-posts{display:grid;gap:16px}.board-post{background:#fff;border:1px solid var(--line);padding:25px 28px;box-shadow:var(--shadow)}.post-header{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}.post-category{padding:3px 9px;color:var(--accent-dark);background:#faedf1;border-radius:2px;font-size:11px;font-weight:700}.post-header time{color:var(--muted);font-family:Georgia,serif;font-size:12px}.board-post h3{margin-bottom:14px;font-family:"Yu Mincho",YuMincho,serif}.post-message{margin:0;overflow-wrap:anywhere;white-space:normal}.post-author{display:flex;gap:10px;margin-top:20px;padding-top:12px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.post-author strong{color:var(--ink)}.board-empty{padding:45px 28px;text-align:center;background:#fff;border:1px solid var(--line)}.board-empty p{margin-bottom:0;color:var(--muted)}
.board-form-panel{position:sticky;top:106px;padding:28px;background:#fff;border:1px solid #dfbcc9;box-shadow:var(--shadow)}.board-form-panel h2{font-size:26px}.board-form{margin-top:23px}.board-form .field{margin-bottom:19px}.compact-consent{font-size:13px}.board-form-panel .submit{margin-top:4px}

.site-footer{margin-top:30px;background:#4b2c37;color:#f2e6ea;padding:50px 0 22px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:start}.footer-grid strong{font-family:"Yu Mincho",YuMincho,serif;font-size:18px;letter-spacing:.1em}.footer-grid p{max-width:560px;color:#d6c3ca}.footer-links{display:flex;flex-wrap:wrap;gap:12px 20px;justify-content:flex-end}.footer-links a{color:#eee0e5;font-size:13px}.copyright{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.16);color:#bea8b0;font-size:11px}

@media (max-width:900px){.hero-grid,.story-grid,.news-grid,.footer-grid,.board-layout{grid-template-columns:1fr}.hero-grid{gap:40px}.callout{display:block;padding:32px 28px}.registration-box{display:block}.registration-box .button{margin-top:18px}.footer-links{justify-content:flex-start}.board-form-panel{position:static;grid-row:1}}
@media (max-width:800px){.wrap,.narrow,.form-wrap,.form-page-wrap{width:min(100% - 30px,var(--max))}.header-inner{min-height:70px}.brand-mark{width:40px;height:40px}.brand strong{font-size:17px}.menu-button{display:block}.global-nav{display:none;position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;gap:14px;padding:18px 20px 24px;background:#fffaf9;border-bottom:1px solid var(--line)}.global-nav.open{display:flex}.global-nav .nav-cta{text-align:center}.hero{padding:58px 0 62px}.hero::after{font-size:120px;bottom:-35px}.section{padding:58px 0}.section-head{align-items:flex-start;flex-direction:column}.feature-grid,.info-band{grid-template-columns:1fr;border:0}.feature-card,.info-box{border-right:0;border-bottom:1px solid var(--line)}.feature-card:first-child,.info-box:first-child{border-top:1px solid var(--line)}.timeline-item{grid-template-columns:82px 1fr;gap:14px}.detail-table div{grid-template-columns:1fr;gap:3px}.form-card{padding:24px 20px}.embedded-form-section{padding-top:28px}.embedded-form-shell{border-radius:4px}.embedded-form-shell iframe{height:2900px}.form-help-box{padding:20px 16px}}
@media (max-width:560px){h1{font-size:36px}.button-row{display:grid}.mini-panel{grid-template-columns:1fr}.mini-stat{border-right:0;border-bottom:1px solid #dfbcc9}.mini-stat:last-child{border-bottom:0}.timeline-item,.history-item{grid-template-columns:1fr}.history-item{gap:8px}}