/* ==========================================================================
   克莱因蓝个人网 · 版块层（sections）
   主页 / 作品集 / 约稿与排单 / 直播与模型 / 信息投递 / 灯箱 / 响应式
   —— 样式与原始单文件页面逐行一致。
   ========================================================================== */

/* ============================================================
   页面 1：主页 (增加 Z 轴遮挡)
   ============================================================ */
.collage-container { position: relative; width: 100%; min-height: 70vh; display: flex; justify-content: center; align-items: center; }
.bg-star { position: absolute; fill: var(--riso-blue); opacity: 0.6; mix-blend-mode: multiply; transition: transform 0.3s, opacity 0.3s; }
.bg-heart { position: absolute; fill: var(--riso-blue); opacity: 0.55; mix-blend-mode: multiply; transition: transform 0.3s, opacity 0.3s; }
.bg-star:hover, .bg-heart:hover { opacity: 1; transform: scale(1.35) rotate(20deg) !important; }
.glitch-text { position: absolute; color: var(--riso-blue); font-family: var(--font-typewriter); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; opacity: 0.85; mix-blend-mode: multiply; transition: opacity 0.2s, letter-spacing 0.2s; cursor: help; }
.glitch-text:hover { opacity: 1; letter-spacing: 4px; }
.doodle { position: absolute; font-family: var(--font-accent); font-size: 16px; font-weight: 700; letter-spacing: 1px; color: #000; mix-blend-mode: multiply; transition: transform 0.3s, color 0.3s; }
.doodle:hover { transform: scale(1.3) rotate(0) !important; color: var(--riso-blue); }

.main-photo {
  position: relative; width: 100%; max-width: 420px; aspect-ratio: 3/4;
  background: var(--riso-blue); padding: 12px 12px 48px 12px;
  box-shadow: 2px 2px 0 rgba(0,47,167,0.5), 9px 14px 0 rgba(0,0,0,0.08); transform: rotate(-2deg) translate(20px, 20px); z-index: 5;
  transition: transform 0.35s, box-shadow 0.35s;
}
.main-photo:hover { transform: rotate(0deg) translate(20px, 20px) scale(1.02); box-shadow: 5px 5px 0 var(--riso-blue-dark), 16px 22px 0 rgba(0,0,0,0.1); }
.main-photo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%) contrast(1.4) brightness(1.02); mix-blend-mode: multiply; transition: filter 0.35s; }
.main-photo:hover img { filter: grayscale(55%) contrast(1.25) brightness(1.05); }
.main-photo::after { content: ''; position: absolute; inset: 12px 12px 48px 12px; background-image: radial-gradient(circle, rgba(0,0,0,0.65) 1px, transparent 1.4px); background-size: 5px 5px; opacity: 0.5; pointer-events: none; mix-blend-mode: multiply; }

.info-card { position: absolute; background: #fff; border: 2px solid var(--text-color); padding: 24px; box-shadow: var(--shadow-hard), 8px 12px 24px rgba(0,0,0,0.16); z-index: 15; transition: transform 0.3s, box-shadow 0.3s; }

/* 名字卡片压住图片 */
.card-name { top: 8%; left: 2%; transform: rotate(3deg); max-width: 320px; z-index: 20; }
.card-name:hover { transform: rotate(0deg) translateY(-6px); box-shadow: 6px 8px 0 var(--riso-blue-dark), 12px 18px 32px rgba(0,0,0,0.22); }
.card-name h1 { font-size: 48px; font-weight: 900; line-height: 1; text-transform: uppercase; margin-bottom: 8px; letter-spacing: 1px; }
.card-name .highlight { display: inline-block; background: var(--riso-blue); color: #fff; padding: 4px 8px; margin-top: 4px; font-family: var(--font-pixel); font-size: 12px; letter-spacing: 1px; transition: transform 0.25s, background 0.25s; }
.card-name .highlight:hover { transform: rotate(-2deg) scale(1.06); background: var(--riso-blue-dark); }
.card-name .highlight .cn { font-size: 12px; letter-spacing: 1px; }
.card-name p { font-size: 14px; margin-top: 16px; font-weight: 700; line-height: 1.6; }

.card-status { bottom: 8%; right: 2%; transform: rotate(-6deg); display: flex; flex-direction: column; gap: 16px; width: 280px; z-index: 15; }
.card-status:hover { transform: rotate(0deg) translateY(-6px); box-shadow: 6px 8px 0 var(--riso-blue-dark), 12px 18px 32px rgba(0,0,0,0.22); }
.status-row { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px dashed var(--text-color); padding-bottom: 8px; transition: padding-left 0.2s, background 0.2s; }
.status-row:hover { background: rgba(141,178,228,0.18); padding-left: 6px; }
.status-row span:first-child { font-size: 12px; font-weight: 700; }
.status-row span:last-child { background: var(--riso-blue-light); color: var(--riso-blue-dark); padding: 2px 8px; font-weight: 900; font-size: 12px; transition: transform 0.2s, background 0.2s, color 0.2s; }
.status-row:hover span:last-child { background: var(--riso-blue); color: #fff; transform: scale(1.05); }

.btn-riso { display: block; text-align: center; background: var(--riso-blue); color: #fff; padding: 12px; font-weight: 900; letter-spacing: 1px; border: 2px solid var(--riso-blue-dark); box-shadow: 3px 3px 0 var(--riso-blue-dark); transition: all 0.1s; }
.btn-riso:hover { transform: translate(3px, 3px); box-shadow: 0 0 0 transparent; }

.social-sticker { position: absolute; bottom: 16%; left: calc(50% - 290px); display: flex; flex-direction: column; align-items: flex-start; gap: 10px; z-index: 22; }
.sticker { background: #fff; border: 1px solid var(--text-color); padding: 6px 12px; font-size: 12px; font-weight: 700; box-shadow: 2px 2px 0 var(--riso-blue), 4px 6px 14px rgba(0,0,0,0.18); transform: rotate(-5deg); transition: all 0.2s; }
.sticker:nth-child(even) { transform: rotate(4deg); }
.sticker:hover { transform: scale(1.1) rotate(0); z-index: 20; box-shadow: 4px 4px 0 var(--riso-blue-dark), 6px 10px 18px rgba(0,0,0,0.25); background: var(--riso-blue); color: #fff; }

/* ============================================================
   页面 2：作品集 (随机旋转 & 竖版相纸)
   ============================================================ */
.portfolio-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: clamp(32px, 5vw, 56px) clamp(24px, 4vw, 40px); padding: 24px 0 0; }
.polaroid {
  background: #FCFCFA; /* 微黄相纸底色 */
  padding: 12px 12px 50px 12px; border: 1px solid #E0E0E0;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.02), 4px 4px 0 var(--riso-blue), 6px 10px 16px rgba(0,0,0,0.08);
  position: relative; transition: transform 0.3s, box-shadow 0.3s; cursor: zoom-in;
}
/* 打破网格的随机旋转 */
.polaroid:nth-child(1) { transform: rotate(-2deg); }
.polaroid:nth-child(2) { transform: rotate(3deg); margin-top: 20px; }
.polaroid:nth-child(3) { transform: rotate(-1deg); }
.polaroid:nth-child(4) { transform: rotate(4deg); margin-top: -10px; }

.polaroid:hover { transform: scale(1.05) rotate(0); z-index: 20; box-shadow: 8px 8px 0 var(--riso-blue-dark); }
.polaroid img { width: 100%; aspect-ratio: 3/4; object-fit: cover; border: 1px solid #E0E0E0; filter: grayscale(100%) contrast(1.35); mix-blend-mode: multiply; }
.polaroid::after { content: ''; position: absolute; inset: 12px 12px 50px 12px; background-image: radial-gradient(circle, rgba(0,0,0,0.6) 1px, transparent 1.4px); background-size: 5px 5px; opacity: 0.45; pointer-events: none; mix-blend-mode: multiply; }
.polaroid p { position: absolute; bottom: 8px; left: 0; width: 100%; text-align: center; font-family: var(--font-accent); font-size: 15px; font-weight: 700; color: #333; letter-spacing: 1px; line-height: 1.15; }
.polaroid p .en { display: block; font-family: var(--font-typewriter); font-size: 10px; letter-spacing: 1.5px; color: var(--riso-blue); }

/* ============================================================
   页面 3：约稿与排单 (加入红色印章)
   ============================================================ */
.commission-layout { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: clamp(28px, 4vw, 48px); align-items: start; }

.contract-box { background: #fff; border: 2px solid var(--text-color); padding: 32px; box-shadow: var(--shadow-hard-dark); position: relative; }

/* 印章元素 */
.stamp {
  position: absolute; top: 20px; right: 20px;
  border: 3px solid var(--stamp-red); color: var(--stamp-red);
  padding: 4px 12px; font-family: var(--font-pixel); font-size: 18px; font-weight: 900;
  text-transform: uppercase; letter-spacing: 2px; transform: rotate(-15deg);
  opacity: 0.8; border-radius: 4px; pointer-events: none;
}
/* 副标题由内容接口注入（CSS 变量），默认值与原始页面一致 */
.stamp::after { content: var(--stamp-note, 'COMMISSIONS / 约稿状态'); position: absolute; top: 100%; left: 50%; transform: translateX(-50%); font-size: 10px; white-space: nowrap; opacity: 0.8; }

.contract-title { font-size: 20px; font-weight: 900; border-bottom: 4px dashed var(--text-color); padding-bottom: 12px; margin-bottom: 24px; text-transform: uppercase; letter-spacing: 1px; }
.price-list { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.price-list td { padding: 16px 0; border-bottom: 1px dotted #CCC; font-size: 15px; font-weight: 700; }
.price-list td:last-child { text-align: right; color: var(--riso-blue); font-size: 18px; }
.price-list .desc { font-size: 12px; font-weight: 400; color: #666; display: block; margin-top: 4px; letter-spacing: 0; }

.rules-box { background: #FFFDF5; border: 1px dashed #CCC; padding: 16px; margin-bottom: 24px; font-size: 13px; line-height: 1.8; }
.rules-box strong { color: var(--stamp-red); font-weight: 900; }

.btn-checkout { display: block; width: 100%; text-align: center; background: var(--riso-blue); color: #fff; padding: 16px; font-weight: 900; font-size: 16px; border: 2px solid var(--riso-blue-dark); box-shadow: 4px 4px 0 var(--riso-blue-dark); text-transform: uppercase; transition: all 0.15s; }
.btn-checkout:hover { transform: translate(4px, 4px); box-shadow: 0 0 0 transparent; }

.todo-box { background: #fff; border: 2px solid var(--text-color); padding: 24px; position: relative; transform: rotate(1deg); box-shadow: var(--shadow-hard); }
.todo-title { font-size: 16px; font-weight: 900; border-bottom: 2px solid var(--text-color); padding-bottom: 8px; margin-bottom: 16px; display: flex; justify-content: space-between; letter-spacing: 1px; }
.todo-item { display: flex; align-items: flex-start; gap: 12px; padding: 12px 0; border-bottom: 1px dashed #CCC; }
.todo-checkbox { width: 18px; height: 18px; border: 2px solid var(--text-color); flex-shrink: 0; margin-top: 4px; background: #fff; }
.todo-checkbox.done { background: var(--riso-blue); box-shadow: inset 0 0 0 2px #fff; }
.todo-text { flex: 1; }
.todo-text h4 { font-size: 15px; margin-bottom: 4px; }
.todo-text p { font-size: 12px; color: #666; }
.todo-status { font-family: var(--font-pixel); font-size: 11px; background: var(--riso-blue-light); padding: 4px 8px; border: 1px solid var(--text-color); font-weight: 700; text-align: center; }
.todo-status .en { display: block; font-size: 9px; letter-spacing: 0.5px; opacity: 0.85; }

/* 月份排期：以「旬」为单位的档期贴纸 */
.schedule-area { margin-top: clamp(36px, 6vw, 64px); }
.schedule-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-bottom: 3px dashed var(--text-color); padding-bottom: 10px; margin-bottom: 24px; }
.schedule-head h3 { font-family: var(--font-pixel); font-size: 20px; letter-spacing: 1px; }
.schedule-legend { display: flex; gap: 14px; font-size: 11px; font-weight: 700; }
.lg { display: inline-flex; align-items: center; gap: 5px; }
.lg::before { content: ''; width: 12px; height: 12px; border: 1px solid var(--text-color); }
.lg-full::before { background: var(--stamp-red); }
.lg-part::before { background: var(--riso-blue-light); }
.lg-open::before { background: #fff; }

.schedule-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(178px, 1fr)); gap: 28px 18px; }
.sc-card { background: #fff; border: 2px solid var(--text-color); box-shadow: var(--shadow-hard); padding: 14px 14px 12px; position: relative; }
.sc-card:nth-child(odd) { transform: rotate(-1.2deg); }
.sc-card:nth-child(even) { transform: rotate(1.4deg); }
.sc-card.now { border-color: var(--riso-blue); box-shadow: 4px 4px 0 var(--riso-blue); }
.sc-month { font-family: var(--font-pixel); font-size: 12px; letter-spacing: 1px; display: flex; align-items: baseline; gap: 6px; border-bottom: 1px dotted #999; padding-bottom: 8px; margin-bottom: 8px; }
.sc-month b { font-size: 22px; }
.sc-tag { margin-left: auto; font-size: 9px; background: var(--stamp-red); color: #fff; padding: 1px 6px; letter-spacing: 1px; }
.sc-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 6px 0; border-bottom: 1px dashed #CCC; font-size: 12px; font-weight: 700; }
.sc-row:last-of-type { border-bottom: none; }
.sc-state { font-family: var(--font-pixel); font-size: 10px; font-weight: 900; padding: 2px 7px; border: 1px solid var(--text-color); white-space: nowrap; }
.s-full { background: var(--stamp-red); color: #fff; border-color: #8F3322; }
.s-part { background: var(--riso-blue-light); color: var(--riso-blue-dark); }
.s-open { background: #fff; border-style: dashed; }
.sc-state.clickable { cursor: pointer; transition: transform 0.15s, box-shadow 0.15s; }
.sc-state.clickable:hover { transform: scale(1.12) rotate(-2deg); box-shadow: 2px 2px 0 var(--text-color); }
.sc-note { font-family: var(--font-accent); font-size: 13px; font-weight: 700; letter-spacing: 0.5px; color: var(--riso-blue); transform: rotate(-2deg); margin-top: 6px; }

/* ============================================================
   页面 4：直播与模型
   ============================================================ */
.vup-layout { display: grid; grid-template-columns: minmax(260px, 320px) 1fr; gap: clamp(32px, 5vw, 56px); align-items: start; }
.vup-sidebar { display: flex; flex-direction: column; gap: 24px; }

.weekly-list { background: #fff; border: 2px solid var(--text-color); padding: 20px 20px 16px; box-shadow: var(--shadow-hard); position: relative; }
.weekly-list::before { content: ''; position: absolute; top: 0; left: 20px; bottom: 0; width: 2px; background: repeating-linear-gradient(to bottom, transparent, transparent 8px, #EEE 8px, #EEE 16px); z-index: 0; }

.weekly-item { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; position: relative; z-index: 1; }
.weekly-item:last-child { margin-bottom: 0; }
.week-day { width: 46px; height: 44px; background: var(--riso-blue); color: #fff; font-family: var(--font-pixel); font-weight: 900; font-size: 11px; line-height: 1.1; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 2px solid var(--text-color); box-shadow: 2px 2px 0 var(--text-color); flex-shrink: 0; }
.week-day .cn { font-size: 10px; letter-spacing: 0; opacity: 1; }
.week-info h4 { font-size: 14px; margin-bottom: 0; line-height: 1.4; }
.week-info p { font-size: 11px; font-weight: 700; color: #666; line-height: 1.5; }

/* 休息日：日格反白描边，条目虚线弱化 */
.weekly-item.rest .week-day { background: #fff; color: var(--text-color); box-shadow: 2px 2px 0 var(--riso-blue-light); }
.weekly-item.rest .week-info h4 { font-family: var(--font-accent); font-size: 14px; font-weight: 700; letter-spacing: 1px; color: #888; }

.vup-actions { display: flex; flex-direction: column; gap: 12px; }
.btn-action { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; font-weight: 900; font-size: 15px; border: 2px solid var(--text-color); transition: all 0.15s; }
.btn-action .en { display: block; text-align: left; opacity: 0.8; }
.btn-live { background: var(--text-color); color: #fff; box-shadow: 4px 4px 0 var(--riso-blue); }
.btn-live:hover { transform: translate(4px, 4px); box-shadow: 0 0 0 transparent; background: var(--riso-blue-dark); border-color: var(--riso-blue-dark); }
.btn-group { background: var(--riso-blue); color: #fff; box-shadow: 4px 4px 0 var(--riso-blue-dark); }
.btn-group:hover { transform: translate(4px, 4px); box-shadow: 0 0 0 transparent; }

.models-area { position: relative; padding-top: 20px; }
.models-area h3 { font-family: var(--font-pixel); font-size: 22px; margin-bottom: 24px; display: inline-block; border-bottom: 2px dashed #000; padding-bottom: 4px; letter-spacing: 1px; }

/* 模型拼贴堆叠：缩小拍立得 + 绝对定位错落 */
.model-collage { position: relative; min-height: 440px; margin-top: 8px; }
.model-card-sm { position: absolute; width: 168px; background: #FCFCFA; padding: 7px 7px 32px 7px; border: 1px solid #E0E0E0; box-shadow: inset 0 0 10px rgba(0,0,0,0.02), 3px 3px 0 var(--riso-blue-light), 6px 10px 18px rgba(0,0,0,0.08); transition: all 0.3s; cursor: pointer; }
.model-card-sm:hover { transform: translateY(-8px) rotate(0) !important; z-index: 10; box-shadow: 6px 6px 0 var(--riso-blue); }
.model-card-sm img { width: 100%; aspect-ratio: 3/4; object-fit: cover; border: 1px solid #E0E0E0; filter: grayscale(100%) contrast(1.35); mix-blend-mode: multiply; }
.model-card-sm::after { content: ''; position: absolute; inset: 7px 7px 32px 7px; background-image: radial-gradient(circle, rgba(0,0,0,0.6) 1px, transparent 1.4px); background-size: 5px 5px; opacity: 0.45; pointer-events: none; mix-blend-mode: multiply; }
.model-card-sm .info { position: absolute; bottom: 6px; left: 0; width: 100%; text-align: center; }
.model-card-sm h4 { font-family: var(--font-accent); font-size: 13px; font-weight: 700; letter-spacing: 1px; margin-bottom: 1px; color: #333; }
.model-card-sm span { font-size: 9px; font-weight: 700; background: var(--text-color); color: #fff; padding: 1px 5px; letter-spacing: 1px; }

/* 4 张错落坐标：后排三张扇形展开，前排一张压住下缘 */
.model-card-sm:nth-child(1) { top: 10px; left: 6%; z-index: 2; transform: rotate(-8deg); }
.model-card-sm:nth-child(2) { top: 0; left: 30%; z-index: 3; transform: rotate(4deg); }
.model-card-sm:nth-child(3) { top: 14px; right: 8%; z-index: 1; transform: rotate(9deg); }
.model-card-sm:nth-child(4) { top: 172px; left: 48%; z-index: 4; transform: rotate(-3deg); }

/* ============================================================
   页面 5：信息投递 (信件飞出与回执动效)
   ============================================================ */
.mail-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(240px, 1fr); gap: 28px; align-items: start; }
.letter-paper { width: 100%; max-width: 600px; background: #fff; border: 2px solid var(--text-color); padding: 48px; box-shadow: var(--shadow-hard); position: relative; }
.mail-notes { background: var(--riso-blue); color: #fff; border: 2px solid var(--riso-blue-dark); box-shadow: 4px 4px 0 var(--text-color); padding: 28px 24px; position: relative; transform: rotate(1.2deg); }
.mail-notes h4 { font-family: var(--font-pixel); font-size: 15px; letter-spacing: 1px; margin-bottom: 14px; }
.mail-notes h4 .cn { color: #fff; opacity: 0.85; }
.mail-notes ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.mail-notes li { font-size: 13px; line-height: 1.5; padding-left: 20px; position: relative; }
.mail-notes li::before { content: '★'; position: absolute; left: 0; top: 0; }
.mail-notes li b { display: block; font-size: 12px; opacity: 0.82; margin-top: 2px; font-weight: 700; }
.mail-notes .no-list li::before { content: '✕'; }
.slot-date-wrap { background: var(--riso-blue-light); border: 2px solid var(--riso-blue); padding: 6px 12px; }
.slot-date-wrap .form-input { border-bottom: none; }
.letter-paper::before { content: ''; position: absolute; inset: 0; pointer-events: none; background-image: repeating-linear-gradient(transparent, transparent 31px, var(--riso-blue-light) 31px, var(--riso-blue-light) 32px); opacity: 0.4; }

.form-group { margin-bottom: 24px; position: relative; z-index: 2; }
.form-group label { display: block; font-size: 14px; font-weight: 900; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }
.form-input { width: 100%; background: transparent; border: none; border-bottom: 2px dashed var(--text-color); padding: 8px 0; font-family: var(--font-typewriter); font-size: 16px; color: var(--text-color); letter-spacing: 0; }
.form-input:focus { outline: none; border-bottom: 2px solid var(--riso-blue); }
textarea.form-input { resize: vertical; min-height: 100px; line-height: 32px; }

.radio-group { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-group .radio-card { flex: 1 1 calc(50% - 12px); }
.radio-card { flex: 1; position: relative; cursor: pointer; }
.radio-card input { position: absolute; opacity: 0; cursor: pointer; }
.radio-box { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 12px; border: 2px solid var(--text-color); background: #fff; font-weight: 700; font-size: 14px; transition: all 0.2s; }
.radio-card input:checked + .radio-box { background: var(--riso-blue); color: #fff; border-color: var(--riso-blue-dark); box-shadow: 2px 2px 0 var(--riso-blue-dark); }

.btn-send { background: var(--text-color); color: #fff; padding: 14px 32px; font-weight: 900; font-size: 16px; border: 2px solid var(--text-color); box-shadow: 4px 4px 0 var(--riso-blue); width: 100%; transition: all 0.15s; position: relative; z-index: 2; letter-spacing: 1px; }
.btn-send .en { display: block; font-size: 10px; opacity: 0.8; }
.btn-send:hover { transform: translate(4px, 4px); box-shadow: 0 0 0 transparent; background: var(--riso-blue); border-color: var(--riso-blue-dark); }

/* 投递动效：航空信件飞出 + 回执吐出 */
.fly-letter {
  position: absolute; left: 50%; bottom: 74px; width: 156px; height: 100px;
  background: #FCFCFA; border: 2px solid var(--text-color); box-shadow: 3px 3px 0 var(--riso-blue);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-family: var(--font-pixel); font-size: 15px; font-weight: 900; letter-spacing: 1px;
  opacity: 0; pointer-events: none; z-index: 120; transform: translate(-50%, 20px) rotate(-6deg) scale(0.6);
}
.fly-letter::before { content: ''; position: absolute; inset: 5px; border: 2px dashed var(--stamp-red); }
.fly-letter::after { content: ''; position: absolute; top: 5px; left: 5px; right: 5px; height: 42px; background: linear-gradient(135deg, var(--riso-blue) 0 50%, transparent 50%) left/50% 100% no-repeat, linear-gradient(225deg, var(--riso-blue-light) 0 50%, transparent 50%) right/50% 100% no-repeat; opacity: 0.5; mix-blend-mode: multiply; }
.fly-letter .cn { font-size: 10px; opacity: 0.8; }
.fly-letter.fly { animation: letter-fly 1.5s cubic-bezier(0.3, 0.7, 0.4, 1) forwards; }
@keyframes letter-fly {
  0% { opacity: 0; transform: translate(-50%, 24px) rotate(-6deg) scale(0.55); }
  24% { opacity: 1; transform: translate(-50%, 0) rotate(-4deg) scale(1); }
  46% { opacity: 1; transform: translate(calc(-50% - 10px), -18px) rotate(-10deg) scale(0.96); }
  100% { opacity: 0; transform: translate(150px, -300px) rotate(26deg) scale(0.35); }
}

.receipt {
  position: absolute; top: 16px; left: 50%; width: min(340px, 86%); z-index: 130;
  background: #fff; border: 2px solid var(--text-color); box-shadow: 4px 4px 0 var(--riso-blue);
  padding: 14px 18px 16px; opacity: 0; pointer-events: none; transform: translate(-50%, -140%) rotate(-1deg);
}
.receipt::after { content: ''; position: absolute; left: 0; right: 0; bottom: -7px; height: 7px; background: repeating-linear-gradient(135deg, var(--text-color) 0 2px, transparent 2px 5px); opacity: 0.55; }
.receipt h5 { font-family: var(--font-pixel); font-size: 16px; letter-spacing: 1px; margin-bottom: 6px; }
.receipt p { font-size: 12px; font-weight: 700; color: #555; }
.receipt .rc-no { display: block; margin-top: 8px; font-family: var(--font-typewriter); font-size: 10px; letter-spacing: 1.5px; color: var(--riso-blue); }
.receipt.show { animation: receipt-eject 2.6s cubic-bezier(0.2, 0.8, 0.3, 1) forwards; }
@keyframes receipt-eject {
  0% { opacity: 0; transform: translate(-50%, -150%) rotate(-4deg); }
  20% { opacity: 1; transform: translate(-50%, 4%) rotate(-1.5deg); }
  34% { transform: translate(-50%, 0) rotate(-1deg); }
  82% { opacity: 1; transform: translate(-50%, 0) rotate(-1deg); }
  100% { opacity: 0; transform: translate(-50%, -18%) rotate(-1deg); }
}

.btn-send.sending { background: repeating-linear-gradient(45deg, var(--riso-blue) 0 8px, var(--riso-blue-light) 8px 16px); border-color: var(--riso-blue-dark); animation: stripe-run 0.5s linear infinite; }
@keyframes stripe-run { to { background-position: 23px 0; } }

/* ============================================================
   全屏灯箱 (暗房与胶带)
   ============================================================ */
.lightbox { position: fixed; inset: 0; background: rgba(26,26,26,0.95); z-index: 2000; display: none; align-items: center; justify-content: center; flex-direction: column; padding: 20px; opacity: 0; transition: opacity 0.3s;
  background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px); background-size: 20px 20px; /* 暗房网格噪点 */
}
.lightbox.active { display: flex; opacity: 1; }

.lb-img-wrapper { position: relative; display: inline-block; max-width: 90vw; max-height: 80vh; padding: 12px; background: #FCFCFA; border: 1px solid #333; box-shadow: 0 20px 50px rgba(0,0,0,0.5); }
.lb-img-wrapper img { max-width: calc(90vw - 24px); max-height: calc(80vh - 24px); object-fit: contain; border: 1px solid #E0E0E0; }

.lightbox-close { position: absolute; top: 24px; right: 32px; color: #fff; font-size: 40px; font-family: var(--font-pixel); cursor: pointer; transition: color 0.2s; line-height: 1; z-index: 10; }
.lightbox-close:hover { color: var(--riso-blue); }

.lb-nav { position: absolute; top: 50%; transform: translateY(-50%); color: #fff; font-size: 40px; font-family: var(--font-pixel); cursor: pointer; padding: 20px; user-select: none; transition: color 0.2s; z-index: 10; }
.lb-nav:hover { color: var(--riso-blue); }
.lb-prev { left: 20px; }
.lb-next { right: 20px; }

.lb-counter { color: #fff; margin-top: 20px; font-family: var(--font-pixel); font-size: 16px; font-weight: 700; letter-spacing: 2px; }

/* ============================================================
   响应式适配 (移动端强制归零旋转)
   ============================================================ */
@media (max-width: 900px) {
  header { position: relative; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 24px; pointer-events: auto; }
  .nav-links { justify-content: center; }
  main { padding-top: 20px; }

  .collage-container { flex-direction: column; gap: 32px; padding: 0 10px; }
  .main-photo { transform: rotate(0) !important; max-width: 300px; }
  .info-card { position: relative; top: 0; left: 0; right: 0; bottom: 0; width: 100%; max-width: 340px; transform: rotate(0) !important; margin: 0 auto; }
  .social-sticker { position: relative; bottom: 0; left: 0; flex-direction: row; flex-wrap: wrap; justify-content: center; margin: 0 auto; }
  .bg-star, .bg-heart, .glitch-text, .doodle { display: none; }
  .mail-layout { grid-template-columns: 1fr; }
  .mail-notes { transform: rotate(0); }

  .commission-layout, .vup-layout { grid-template-columns: 1fr; }

  /* 移动端取消所有旋转，避免溢出错位 */
  .todo-box, .sc-card,
  .polaroid:nth-child(1), .polaroid:nth-child(2), .polaroid:nth-child(3), .polaroid:nth-child(4) {
    transform: rotate(0) !important;
    margin-top: 0;
  }

  /* 模型拼贴改为静态横排，取消绝对定位堆叠 */
  .model-collage { display: flex; flex-wrap: wrap; gap: 20px 16px; justify-content: center; min-height: 0; }
  .model-card-sm, .model-card-sm:nth-child(1), .model-card-sm:nth-child(2), .model-card-sm:nth-child(3), .model-card-sm:nth-child(4) {
    position: static; width: 150px; transform: rotate(0) !important; top: auto; left: auto; right: auto; z-index: auto;
  }

  .letter-paper { padding: 24px; }
  .radio-group { flex-direction: column; }

  .lb-nav { font-size: 30px; padding: 10px; }
  .lb-prev { left: 0; }
  .lb-next { right: 0; }
}

@media (max-width: 640px) {
  .page-title { flex-wrap: wrap; gap: 10px; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .letter-paper { padding: 32px 20px; }
  .card-name h1 { font-size: 38px; }
}

/* ============================================================
   前后端分离后的必要补充
   说明：以下规则只覆盖「加载态 / 请求错误提示」这类原单文件页面不存在的场景，
        不影响任何既有版块的视觉表现。
   ============================================================ */

/* 首屏加载 / 错误遮罩 */
.boot-status {
  position: fixed; inset: 0; z-index: 3000;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; padding: 24px; text-align: center;
  background: var(--bg-color);
  font-family: var(--font-pixel); font-size: 13px; letter-spacing: 2px; color: var(--riso-blue-dark);
}
body:not(.is-booting) .boot-status { display: none; }
.boot-status .boot-mark {
  font-family: var(--font-pixel); font-size: 34px; font-weight: 900; letter-spacing: 4px;
  color: var(--riso-blue); border: 2px solid var(--riso-blue); padding: 10px 18px;
  transform: rotate(-1.5deg); box-shadow: 5px 5px 0 var(--riso-blue-dark);
}
.boot-status .boot-hint {
  font-family: var(--font-typewriter); font-size: 12px; letter-spacing: 0.5px;
  color: #777; max-width: 460px; line-height: 1.9;
}
.boot-status .boot-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-top: 4px; }
.boot-status .boot-btn {
  background: var(--riso-blue); color: #fff; border: 2px solid var(--riso-blue-dark);
  padding: 9px 18px; font-family: var(--font-accent); font-weight: 900; font-size: 13px;
  letter-spacing: 1px; box-shadow: 3px 3px 0 var(--riso-blue-dark);
}
.boot-status .boot-btn:hover { transform: translate(3px, 3px); box-shadow: none; }

/* 投递失败提示（沿用信封与印章的视觉语言） */
.form-error {
  margin-top: 14px; padding: 10px 14px;
  border: 2px dashed var(--stamp-red); background: rgba(208, 83, 58, 0.07);
  color: #8F3322; font-family: var(--font-typewriter); font-size: 12px;
  letter-spacing: 0; line-height: 1.8; position: relative; z-index: 2;
}
.form-error[hidden] { display: none; }

/* 无图 / 断网时的占位图外观保持相纸比例 */
img[data-fallback-applied="1"] { object-fit: contain !important; background: #EDEFF3; }