/* ========================================
   毕业网站通用增强功能
   包含：导航、动画、手势、分享等
   ======================================== */

/* ===== 页面间导航 ===== */
.page-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:40px;padding:24px 20px;background:linear-gradient(135deg,#f5f0ea 0%,#ede6dc 100%);border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,0.06)}
.page-nav .nav-btn{flex:1;text-decoration:none;padding:14px 20px;border-radius:10px;text-align:center;transition:all .25s;font-size:14px;display:flex;flex-direction:column;align-items:center;gap:4px}
.page-nav .nav-btn.prev{background:rgba(255,255,255,0.6);color:#888}
.page-nav .nav-btn.next{background:linear-gradient(135deg,#c4a882,#d4b89a);color:#fff}
.page-nav .nav-btn:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(0,0,0,0.12)}
.page-nav .nav-btn.prev:hover{background:rgba(255,255,255,0.9)}
.page-nav .nav-btn .nav-label{font-size:11px;opacity:0.7;letter-spacing:1px}
.page-nav .nav-btn .nav-title{font-size:15px;font-weight:600}
.page-nav .nav-btn.next .nav-title{color:#fff}
.page-nav .nav-center{flex-shrink:0}
.page-nav .nav-center a{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:rgba(196,168,130,0.15);color:#c4a882;text-decoration:none;font-size:18px;transition:all .25s}
.page-nav .nav-center a:hover{background:rgba(196,168,130,0.3);transform:scale(1.1)}

/* ===== 滚动淡入动画 ===== */
.fade-in{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ===== 图片hover放大 ===== */
.photo-item{overflow:visible}
.photo-item img{transition:transform .3s ease}
.photo-item:hover img{transform:scale(1.03)}

/* ===== 页面加载动画 ===== */
.loader{position:fixed;top:0;left:0;width:100%;height:100%;background:#faf7f2;z-index:99999;display:flex;align-items:center;justify-content:center;flex-direction:column;transition:opacity .5s ease}
.loader.hidden{opacity:0;pointer-events:none}
.loader .loader-circle{width:48px;height:48px;border:3px solid #ede6dc;border-top-color:#c4a882;border-radius:50%;animation:spin 0.8s linear infinite}
.loader .loader-text{margin-top:16px;font-size:13px;color:#c4a882;letter-spacing:2px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== 首页封面动画 ===== */
.cover{animation:coverFadeIn 1.2s ease}
@keyframes coverFadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.cover .room{animation:slideIn 0.8s ease 0.2s both}
.cover h1{animation:slideIn 0.8s ease 0.4s both}
.cover .sub{animation:slideIn 0.8s ease 0.6s both}
.cover .quote-box{animation:slideIn 0.8s ease 0.8s both}
@keyframes slideIn{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}
.diary-card{animation:cardSlideIn 0.6s ease both}
@keyframes cardSlideIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

/* ===== 灯箱键盘提示 ===== */
.lightbox .lb-hint{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);font-size:11px;color:rgba(255,255,255,0.4);letter-spacing:1px}

/* ===== 视频倍速控制 ===== */
.video-speed{position:absolute;bottom:60px;right:16px;display:flex;gap:4px;z-index:10}
.video-speed button{padding:4px 10px;font-size:11px;border:1px solid rgba(255,255,255,0.3);background:rgba(0,0,0,0.5);color:#fff;border-radius:4px;cursor:pointer;transition:all .2s}
.video-speed button.active{background:#c4a882;border-color:#c4a882}
.video-speed button:hover{background:rgba(196,168,130,0.5)}

/* ===== 分享按钮 ===== */
.share-section{margin-top:32px;text-align:center}
.share-section .share-title{font-size:13px;color:#999;margin-bottom:12px;letter-spacing:1px}
.share-section .share-btns{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.share-section .share-btn{display:flex;align-items:center;gap:6px;padding:10px 20px;border-radius:24px;font-size:13px;text-decoration:none;cursor:pointer;transition:all .25s;border:1px solid #ede6dc}
.share-section .share-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.1)}
.share-section .share-btn.wechat{background:#07c160;color:#fff;border-color:#07c160}
.share-section .share-btn.qq{background:#12b7f5;color:#fff;border-color:#12b7f5}
.share-section .share-btn.link{background:#f5f0ea;color:#c4a882}
.share-section .share-btn.qrcode{background:#f5f0ea;color:#c4a882}

/* ===== 二维码弹窗 ===== */
.qrcode-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.85);z-index:99998;display:none;align-items:center;justify-content:center;flex-direction:column}
.qrcode-modal.active{display:flex}
.qrcode-modal .qr-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.15);border:none;color:#fff;font-size:18px;cursor:pointer}
.qrcode-modal .qr-content{background:#fff;padding:24px;border-radius:16px;text-align:center}
.qrcode-modal .qr-content img{width:200px;height:200px;border-radius:8px}
.qrcode-modal .qr-content p{margin-top:12px;font-size:13px;color:#666}

/* ===== 留言板 ===== */
.message-board{margin-top:48px;padding:32px 24px;background:linear-gradient(135deg,#f5f0ea 0%,#ede6dc 100%);border-radius:16px}
.message-board .mb-title{font-size:18px;font-weight:600;color:#2c2c2c;text-align:center;margin-bottom:8px}
.message-board .mb-sub{font-size:13px;color:#999;text-align:center;margin-bottom:20px}
.message-board .mb-form{display:flex;gap:8px;margin-bottom:16px}
.message-board .mb-form input{flex:1;padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-size:13px;background:#fff}
.message-board .mb-form button{padding:10px 20px;background:#c4a882;color:#fff;border:none;border-radius:8px;font-size:13px;cursor:pointer;transition:background .2s;flex-shrink:0}
.message-board .mb-form button:hover{background:#b0986a}
.message-board .mb-list{max-height:400px;overflow-y:auto}
.message-board .mb-item{padding:12px 16px;background:rgba(255,255,255,0.6);border-radius:8px;margin-bottom:8px}
.message-board .mb-item .mb-name{font-size:13px;font-weight:600;color:#c4a882}
.message-board .mb-item .mb-text{font-size:13px;color:#555;margin-top:4px;line-height:1.6}
.message-board .mb-item .mb-time{font-size:11px;color:#bbb;margin-top:4px}
.message-board .mb-empty{text-align:center;color:#bbb;font-size:13px;padding:20px}

/* ===== 留言板手机端适配 ===== */
@media(max-width:640px){
  .message-board{padding:24px 16px}
  .message-board .mb-form{flex-direction:column;gap:10px}
  .message-board .mb-form input{flex:1;min-width:0;width:100%;font-size:16px;padding:12px 14px}
  .message-board .mb-form button{width:100%;padding:12px;font-size:15px}
  .message-board .mb-form .mb-image-btn{width:100%;height:44px}
}

/* ===== 留言板图片功能 ===== */
.mb-image-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:#fff;border:1px solid #ddd;border-radius:8px;color:#c4a882;cursor:pointer;flex-shrink:0;transition:all .2s}
.mb-image-btn:hover{background:#faf3ea;border-color:#c4a882}
.mb-image-preview{margin-top:10px;position:relative;display:inline-block}
.mb-image-preview img{max-width:120px;max-height:120px;border-radius:8px;border:2px solid #c4a882;display:block}
.mb-image-preview .mb-image-remove{position:absolute;top:-8px;right:-8px;width:22px;height:22px;border-radius:50%;background:#e74c3c;color:#fff;border:2px solid #fff;font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1}
.mb-item .mb-image{margin-top:8px;max-width:200px;max-height:200px;border-radius:8px;cursor:pointer;transition:transform .2s;display:block}
.mb-item .mb-image:hover{transform:scale(1.02)}
.mb-upload-status{font-size:12px;color:#c4a882;margin-top:6px}

/* ===== 时光胶囊 ===== */
.time-capsule{margin-top:32px;padding:32px 24px;background:linear-gradient(135deg,#2c2c2c 0%,#3d3530 100%);border-radius:16px;text-align:center}
.time-capsule .tc-title{font-size:18px;color:#c4a882;letter-spacing:2px;margin-bottom:8px}
.time-capsule .tc-sub{font-size:13px;color:rgba(255,255,255,0.5);margin-bottom:20px}
.time-capsule .tc-form{display:flex;flex-direction:column;gap:10px}
.time-capsule .tc-form textarea{width:100%;padding:12px 16px;border:1px solid rgba(196,168,130,0.3);background:rgba(255,255,255,0.05);color:#fff;border-radius:8px;font-size:13px;resize:vertical;min-height:80px;font-family:inherit}
.time-capsule .tc-form textarea::placeholder{color:rgba(255,255,255,0.3)}
.time-capsule .tc-form button{padding:12px 24px;background:#c4a882;color:#fff;border:none;border-radius:8px;font-size:14px;cursor:pointer;transition:all .2s;align-self:center}
.time-capsule .tc-form button:hover{background:#b0986a;transform:translateY(-1px)}
.time-capsule .tc-saved{margin-top:16px;padding:12px 16px;background:rgba(196,168,130,0.1);border-radius:8px;font-size:13px;color:rgba(196,168,130,0.8)}

/* ===== 毕业正计时 ===== */
.graduation-counter{text-align:center;padding:20px;background:rgba(196,168,130,0.08);border-radius:12px;margin-top:24px}
.graduation-counter .gc-label{font-size:12px;color:#999;letter-spacing:1px}
.graduation-counter .gc-days{font-size:32px;font-weight:700;color:#c4a882;margin:4px 0}
.graduation-counter .gc-sub{font-size:12px;color:#bbb}

/* ===== 手机端视频修复 ===== */
@media(max-width:768px){
  .video-modal video{object-fit:contain!important}
  .video-card-thumb video{object-fit:cover!important;opacity:0.4}
  .video-card-thumb{height:200px}
}

/* ===== 右侧浮动分享栏 ===== */
.float-share{position:fixed;right:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:10px;z-index:90;opacity:0.85;transition:opacity .3s}
.float-share:hover{opacity:1}
.float-share .fs-btn{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;border:none;font-size:13px;color:#fff;transition:transform .2s,box-shadow .2s;text-decoration:none;font-weight:bold}
.float-share .fs-btn:hover{transform:scale(1.15);box-shadow:0 4px 12px rgba(0,0,0,0.2)}
.float-share .fs-wechat{background:#07c160}
.float-share .fs-qq{background:#12b7f5}
.float-share .fs-link{background:#c4a882}
.float-share .fs-qr{background:#888}
.float-share .fs-top{background:rgba(0,0,0,0.3)}
@media(max-width:768px){
  .float-share{right:8px;gap:6px}
  .float-share .fs-btn{width:34px;height:34px;font-size:12px}
}

/* ===== 8120彩蛋 ===== */
.easter-egg{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.95);z-index:99999;display:none;align-items:center;justify-content:center;flex-direction:column}
.easter-egg.active{display:flex;animation:eggFadeIn .5s ease}
@keyframes eggFadeIn{from{opacity:0}to{opacity:1}}
.easter-egg .egg-text{font-size:42px;color:#c4a882;letter-spacing:8px;text-align:center;animation:eggTextPulse 2s ease infinite}
.easter-egg .egg-sub{font-size:16px;color:rgba(255,255,255,0.6);margin-top:16px;letter-spacing:2px}
.easter-egg .egg-close{margin-top:32px;padding:10px 28px;border:1px solid rgba(196,168,130,0.4);background:transparent;color:#c4a882;border-radius:24px;font-size:14px;cursor:pointer;transition:all .2s}
.easter-egg .egg-close:hover{background:rgba(196,168,130,0.15)}
.easter-egg .egg-particles{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}
@keyframes eggTextPulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.7;transform:scale(1.05)}}
.easter-egg .egg-hint{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);font-size:11px;color:rgba(255,255,255,0.2);letter-spacing:1px}

/* ===== 章节目录索引 ===== */
.chapter-index{display:flex;align-items:center;gap:12px;margin:36px 0 8px}
.chapter-index .ci-line{flex:1;height:1px;background:linear-gradient(90deg,transparent,#c4a882,transparent)}
.chapter-index .ci-label{font-size:12px;color:#c4a882;letter-spacing:4px;white-space:nowrap}
.ci-hint{text-align:center;font-size:12px;color:#bbb;margin-bottom:20px;letter-spacing:1px}

/* ===== 卡片点击提示 ===== */
.diary-card{position:relative;overflow:hidden;border-left:3px solid transparent;transition:border-color .3s}
.card-number{position:absolute;top:10px;right:14px;font-size:42px;font-weight:800;color:rgba(196,168,130,0.12);font-family:Georgia,serif;line-height:1;pointer-events:none;z-index:0;user-select:none}
.diary-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,#c4a882,#e8d5b7);opacity:0;transition:opacity .3s;z-index:1}
.diary-card:hover::before{opacity:1}
.card-enter-badge{display:inline-flex;align-items:center;gap:4px;margin-top:12px;font-size:12px;color:#c4a882;letter-spacing:1px;opacity:0;transform:translateX(-8px);transition:all .3s;position:relative;z-index:2}
.diary-card:hover .card-enter-badge{opacity:1;transform:translateX(0)}
.card-enter-badge .arrow{display:inline-block;transition:transform .3s}
.diary-card:hover .card-enter-badge .arrow{transform:translateX(4px)}
@media(max-width:768px){
  .diary-card::before{opacity:0.5}
  .card-enter-badge{opacity:0.85;transform:translateX(0)}
  .card-number{font-size:36px;top:8px;right:10px}
}

/* ===== 首次访问引导 ===== */
.first-visit-guide{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:rgba(44,44,44,0.96);color:#c4a882;padding:18px 32px;border-radius:24px;font-size:14px;letter-spacing:2px;z-index:9999;box-shadow:0 4px 32px rgba(0,0,0,0.4);border:1px solid rgba(196,168,130,0.3);animation:guideFadeIn .5s ease;cursor:pointer;text-align:center;line-height:1.8}
.first-visit-guide .guide-arrow{display:block;font-size:24px;margin-bottom:6px;animation:guideBounce 1.5s ease infinite}
.first-visit-guide .guide-close{display:inline-block;margin-top:10px;font-size:11px;color:rgba(255,255,255,0.4);letter-spacing:1px}
@keyframes guideFadeIn{from{opacity:0;transform:translate(-50%,-50%) scale(0.9)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}
@keyframes guideBounce{0%,100%{transform:translateY(0)}50%{transform:translateY(6px)}}
@keyframes guideFadeOut{from{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-50%) scale(0.9)}}