:root{--anniv-gold:#ffdd70;--anniv-gold-light:#ffe8a6;--anniv-gold-dark:#e6b800;--anniv-text:#5a4a00;--anniv-btn-active-bg:#fff;--anniv-btn-active-color:#c49b00;--anniv-btn-border:#ffdd70}.fourth-anniv-page{color:var(--anniv-text);background-color:#fffdf0;font-family:Hiragino Kaku Gothic ProN,Meiryo,sans-serif;overflow-x:hidden}.fourth-anniv-page .hero-caption-bar{background:#000;width:100%;position:relative}.fourth-anniv-page .hero-video-frame{background:#000;width:100%;padding-top:42%;position:relative;overflow:hidden}.fourth-anniv-page .hero-video-inner{pointer-events:none;position:absolute;inset:0}.fourth-anniv-page .hero-video-inner iframe{border:none;width:100%;height:100%}.fourth-anniv-page .hero-video-caption{text-align:center;background:linear-gradient(135deg, var(--anniv-gold) 0%, var(--anniv-gold-light) 100%);color:var(--anniv-text);letter-spacing:.05em;padding:10px 16px;font-size:.95rem;font-weight:700}.fourth-anniv-page .floating-petals{pointer-events:none;z-index:0;width:100%;height:100%;position:fixed;top:0;left:0;overflow:hidden}.fourth-anniv-page .petal{background:radial-gradient(circle, var(--anniv-gold) 40%, transparent 70%);opacity:.7;border-radius:50% 0;width:10px;height:10px;animation:linear infinite petalFall;position:absolute;top:-20px}@keyframes petalFall{0%{opacity:.7;transform:translateY(0)rotate(0)}to{opacity:0;transform:translateY(110vh)rotate(360deg)}}.fourth-anniv-page .head-menu{z-index:10;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#fffdf0eb;flex-wrap:wrap;justify-content:center;padding:8px 0;display:flex;position:sticky;top:30px;box-shadow:0 2px 8px #ffc80026}.fourth-anniv-page .head-menu-button{background-color:var(--anniv-gold);color:var(--anniv-text);cursor:pointer;border:2px solid #0000;border-radius:4px;margin:6px 8px;padding:10px 20px;font-size:1rem;font-weight:700;transition:filter .2s,background-color .2s}.fourth-anniv-page .head-menu-button:hover{filter:brightness(1.08)}.fourth-anniv-page .head-menu-button.isSelected{background-color:var(--anniv-btn-active-bg);color:var(--anniv-btn-active-color);border-color:var(--anniv-gold)}.fourth-anniv-page .birthday-contents{text-align:center;z-index:1;padding:20px 16px 40px;position:relative}.fourth-anniv-page .message-container{flex-wrap:wrap;justify-content:center;gap:16px;max-width:900px;margin:0 auto;padding:16px;display:flex}.fourth-anniv-page .message-card{border:2px solid var(--anniv-gold);text-align:left;background:#fffbe8;border-radius:12px;width:calc(50% - 16px);min-width:260px;padding:16px 20px;box-shadow:2px 4px 10px #ffc8001f}@media (max-width:640px){.fourth-anniv-page .message-card{width:100%}}.fourth-anniv-page .message-header{border-bottom:1px dashed var(--anniv-gold);margin-bottom:8px;padding-bottom:6px}.fourth-anniv-page .message-name{color:var(--anniv-text);font-size:1rem;font-weight:700}.fourth-anniv-page .message-body{color:#5a4a00;font-size:.9rem;line-height:1.7}.fourth-anniv-page .mybox{border:2px dotted var(--anniv-gold-dark);text-align:left;background:#fffbe8;border-radius:8px;max-width:600px;margin:30px auto;padding:16px 20px;position:relative}.fourth-anniv-page .mybox span{color:var(--anniv-text);margin-bottom:8px;font-size:1.1rem;font-weight:700;display:block}.fourth-anniv-page .history-section{text-align:left;max-width:960px;margin:0 auto}.fourth-anniv-page .history-event{border-bottom:1px solid var(--anniv-gold-light);margin-bottom:48px;padding-bottom:32px}.fourth-anniv-page .history-year-date{background:linear-gradient(90deg, var(--anniv-gold-light), transparent);border-left:4px solid var(--anniv-gold-dark);margin-bottom:4px;padding:6px 16px;font-weight:800;color:var(--anniv-text)!important;font-size:1.25rem!important}.fourth-anniv-page .event-title{color:var(--anniv-text);margin:0;padding:4px 16px 12px;font-size:1.05rem;font-weight:700}.fourth-anniv-page .active-history{flex-wrap:wrap;align-items:flex-start;gap:16px;padding:0 8px;display:flex}.fourth-anniv-page .active-history .left,.fourth-anniv-page .active-history .right{flex:300px;min-width:0}.fourth-anniv-page .media1{margin-bottom:12px}.fourth-anniv-page .media1 .twitter-tweet{max-width:100%!important}.fourth-anniv-page .video-wrap{margin-bottom:12px}.fourth-anniv-page .video{width:100%;padding-top:56.25%;position:relative}.fourth-anniv-page .video iframe{border-radius:6px;width:100%;height:100%;position:absolute;inset:0}.fourth-anniv-page .date{border-left:3px solid var(--anniv-gold-dark);background:#fffbe8;border-radius:0 6px 6px 0;margin-bottom:12px;padding:8px 12px}.fourth-anniv-page .place-h3{color:var(--anniv-text);margin:0 0 4px;font-size:.85rem;font-weight:700}.fourth-anniv-page .date ul{margin:0;padding:0;font-size:.9rem;list-style:none}.fourth-anniv-page .date ul li{padding:2px 0}.fourth-anniv-page .article{border:1px solid var(--anniv-gold-light);background:#fffef5;border-radius:6px;margin-bottom:12px;padding:10px 14px}.fourth-anniv-page .article-h3{color:var(--anniv-text);margin:0 0 6px;font-size:.85rem;font-weight:700}.fourth-anniv-page .article ul{margin:0;padding:0;list-style:none}.fourth-anniv-page .article ul li{padding:3px 0;font-size:.85rem;line-height:1.5}.fourth-anniv-page .article ul li a{color:#9a7000;text-decoration:underline}.fourth-anniv-page .article ul li a:hover{color:var(--anniv-gold-dark)}.fourth-anniv-page .slider1{width:100%;margin:24px 0;display:flex;overflow:hidden}.fourth-anniv-page .slider1 ul{flex-shrink:0;margin:0;padding:0;list-style:none;animation:40s linear infinite slide;display:flex}.fourth-anniv-page .slider1 ul:hover{animation-play-state:paused}@keyframes slide{0%{transform:translate(0)}to{transform:translate(-100%)}}.fourth-anniv-page .slider1 ul li{flex-shrink:0;margin-right:8px}.fourth-anniv-page .slider1 ul li img{border-radius:4px;width:auto;height:120px;transition:opacity .2s;display:block}.fourth-anniv-page .slider1 ul li img:hover{opacity:.85}.fourth-anniv-page .recruitment-box-link{max-width:680px;margin:24px auto;padding:0 16px;text-decoration:none;display:block}.fourth-anniv-page .recruitment-box{background:linear-gradient(135deg, var(--anniv-gold-light) 0%, var(--anniv-gold) 100%);text-align:center;border-radius:12px;padding:24px 28px;transition:transform .2s;box-shadow:0 4px 16px #ffc80040}.fourth-anniv-page .recruitment-box:hover{transform:translateY(-2px)}.fourth-anniv-page .recruitment-title{color:var(--anniv-text);margin:0 0 8px;font-size:1.2rem;font-weight:800}.fourth-anniv-page .recruitment-text{color:var(--anniv-text);margin:4px 0;font-size:.9rem}.fourth-anniv-page h3{color:var(--anniv-text)!important;font-size:1.1rem!important}@media (max-width:640px){.fourth-anniv-page .hero-video-frame{padding-top:56.25%}.fourth-anniv-page .head-menu-button{margin:4px 6px;padding:8px 14px;font-size:.9rem}.fourth-anniv-page .active-history{flex-direction:column}.fourth-anniv-page .slider1 ul li img{height:80px}.fourth-anniv-page .history-year-date{font-size:1rem!important}}