.app-container{background:var(--bg-primary);flex-direction:column;height:100dvh;display:flex}.app-container .router-view-wrap{-webkit-overflow-scrolling:touch;flex:1;overflow:hidden auto}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);padding:var(--space-2) 0 calc(var(--space-2) + env(safe-area-inset-bottom));justify-content:space-around;align-items:center;display:flex;position:relative}.bottom-nav:before{content:"";pointer-events:none;background:linear-gradient(#0000,#00000005);height:8px;position:absolute;top:-8px;left:0;right:0}.bottom-nav .nav-item{padding:var(--space-1) var(--space-3);color:var(--text-tertiary);transition:all var(--transition-fast);cursor:pointer;flex-direction:column;align-items:center;gap:4px;text-decoration:none;display:flex;position:relative}.bottom-nav .nav-item .nav-icon{width:24px;height:24px;transition:transform var(--transition-fast)}.bottom-nav .nav-item .nav-icon svg{width:100%;height:100%}.bottom-nav .nav-item .nav-label{letter-spacing:.5px;font-size:11px;font-weight:500}.bottom-nav .nav-item:after{content:"";background:var(--primary);width:4px;height:4px;transition:transform var(--transition-fast);border-radius:50%;position:absolute;bottom:-4px;left:50%;transform:translate(-50%)scale(0)}.bottom-nav .nav-item.active{color:var(--primary)}.bottom-nav .nav-item.active .nav-icon{transform:translateY(-2px)}.bottom-nav .nav-item.active:after{transform:translate(-50%)scale(1)}.bottom-nav .nav-item:active{transform:scale(.95)}.bottom-nav .nav-item .credits-badge{background:var(--primary);color:#fff;white-space:nowrap;border-radius:8px;padding:1px 5px;font-size:9px;font-weight:600;line-height:14px;position:absolute;top:-2px;right:-4px}.bottom-nav .nav-item .credits-badge.has-sub{background:var(--success,#07c160)}.bottom-nav .nav-item.user-nav{color:var(--text-tertiary)}.bottom-nav .nav-item.user-nav:hover{color:var(--text-secondary)}.van-tabbar{display:none!important}:root{--primary-hue:32;--primary:hsl(var(--primary-hue), 85%, 55%);--primary-light:hsl(var(--primary-hue), 80%, 65%);--primary-dark:hsl(var(--primary-hue), 70%, 45%);--primary-soft:hsl(var(--primary-hue), 60%, 95%);--secondary-hue:220;--secondary:hsl(var(--secondary-hue), 30%, 35%);--secondary-light:hsl(var(--secondary-hue), 25%, 50%);--secondary-soft:hsl(var(--secondary-hue), 20%, 96%);--success:#2eb873;--warning:#f49d25;--danger:#dd3c3c;--info:#269dd9;--gray-50:#faf9f7;--gray-100:#f5f3f0;--gray-200:#e8e5e0;--gray-300:#d4d0c8;--gray-400:#a8a39a;--gray-500:#7a756d;--gray-600:#5c5852;--gray-700:#3d3a36;--gray-800:#2a2825;--gray-900:#1a1917;--bg-primary:var(--gray-50);--bg-secondary:#fffefc;--bg-tertiary:var(--gray-100);--text-primary:var(--gray-800);--text-secondary:var(--gray-500);--text-tertiary:var(--gray-400);--text-inverse:#fff;--surface:#fff;--surface-elevated:#fff;--surface-glass:#ffffffd9;--border:var(--gray-200);--border-light:var(--gray-100);--shadow-sm:0 1px 2px #3c32280a;--shadow-md:0 4px 12px #3c322814;--shadow-lg:0 8px 24px #3c32281f;--shadow-xl:0 16px 48px #3c322829;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--font-display:"Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;--font-body:"Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;--font-mono:"SF Mono", "Fira Code", monospace;--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-base:.25s cubic-bezier(.4, 0, .2, 1);--transition-slow:.35s cubic-bezier(.4, 0, .2, 1);--group-color-a:#e3f2fd;--group-color-b:#fce4ec;--group-color-a-dark:#bbdefb;--group-color-b-dark:#f8bbd0}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html,body,#app{width:100%;height:100%;font-family:var(--font-body);color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overscroll-behavior:none;font-size:15px;line-height:1.6;overflow-x:hidden}.van-toast{color:#fff!important}.van-notify{font-size:14px}.van-popup,.van-dialog{color:var(--text-primary)}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);color:var(--text-primary);font-weight:600;line-height:1.3}.page-container{min-height:100%;padding:var(--space-4);padding-bottom:calc(var(--space-12) + 60px);background:var(--bg-primary)}.page-header{margin-bottom:var(--space-5);padding:0 var(--space-2);justify-content:space-between;align-items:center;display:flex}.page-header .page-title{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.02em;font-size:24px;font-weight:700}.card{background:var(--surface);border-radius:var(--radius-lg);padding:var(--space-5);margin-bottom:var(--space-4);box-shadow:var(--shadow-sm);border:1px solid var(--border-light);transition:box-shadow var(--transition-base)}.card:hover{box-shadow:var(--shadow-md)}.card-flat{background:var(--surface);border-radius:var(--radius-md);padding:var(--space-4);margin-bottom:var(--space-3);border:1px solid var(--border)}.section-title{font-family:var(--font-display);color:var(--text-primary);margin-bottom:var(--space-4);align-items:center;gap:var(--space-2);font-size:16px;font-weight:600;display:flex}.section-title:before{content:"";background:linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);border-radius:2px;flex-shrink:0;width:4px;height:18px}.stats-bar{padding:var(--space-4) var(--space-2);background:linear-gradient(135deg, var(--primary-soft) 0%, var(--secondary-soft) 100%);border-radius:var(--radius-lg);border:1px solid var(--border);justify-content:space-around;display:flex}.stats-bar .stat-item{align-items:center;gap:var(--space-1);flex-direction:column;display:flex}.stats-bar .stat-item .stat-value{font-family:var(--font-display);background:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:28px;font-weight:700}.stats-bar .stat-item .stat-label{color:var(--text-secondary);letter-spacing:.5px;font-size:12px;font-weight:500}.seat-cell{aspect-ratio:1;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);min-height:32px;color:var(--text-primary);-webkit-user-select:none;user-select:none;background:linear-gradient(145deg,#f0f7f0 0%,#e8f5e9 100%);border:2px solid #0000;flex-direction:column;justify-content:center;align-items:center;min-width:0;font-size:11px;display:flex;position:relative}.seat-cell:after{content:"";pointer-events:none;background:linear-gradient(145deg,#0000 0%,#fff6 100%);position:absolute;inset:0}.seat-cell.disabled{background:var(--gray-200);color:var(--gray-400);cursor:not-allowed}.seat-cell.disabled:after{display:none}.seat-cell.single-seat{border-color:var(--warning);background:linear-gradient(145deg,#fff8e6 0%,#ffecb3 100%)}.seat-cell.aisle-adjacent{border:1px dashed #90caf9}.seat-cell.group-a{background:var(--group-color-a)}.seat-cell.group-a.has-student{background:linear-gradient(145deg, #d0ebf7 0%, var(--group-color-a-dark) 100%)}.seat-cell.group-a.leader{background:linear-gradient(145deg,#b8d8f0 0%,#90c5e8 100%);border-color:#1565c0;box-shadow:0 0 0 2px #bbdefb}.seat-cell.group-b{background:var(--group-color-b)}.seat-cell.group-b.has-student{background:linear-gradient(145deg, #f5d0dd 0%, var(--group-color-b-dark) 100%)}.seat-cell.group-b.leader{background:linear-gradient(145deg,#f0b8cc 0%,#e899b5 100%);border-color:#c2185b;box-shadow:0 0 0 2px #f8bbd0}.seat-cell.has-student{background:linear-gradient(145deg,#e3f2fd 0%,#bbdefb 100%)}.seat-cell.leader{border-color:var(--primary);background:linear-gradient(145deg,#fdf3e7 0%,#f5d9b3 100%)}.seat-cell.leader .leader-badge{filter:drop-shadow(0 1px 1px #0000001a);font-size:10px;position:absolute;top:2px;right:3px}.seat-cell.conflict-avoid{border-color:var(--danger);animation:1.5s infinite pulse-red}.seat-cell.conflict-height{border-color:var(--warning)}.seat-cell.conflict-vision{border-color:var(--info)}.seat-cell .seat-name{text-overflow:ellipsis;white-space:nowrap;text-align:center;z-index:1;max-width:95%;font-size:11px;font-weight:600;overflow:hidden}.seat-cell .seat-info{color:var(--text-secondary);white-space:nowrap;z-index:1;font-size:8px}.seat-cell .conflict-badge{color:#fff;border-radius:var(--radius-sm);white-space:nowrap;z-index:2;padding:0 4px;font-size:7px;font-weight:600;line-height:14px;position:absolute;top:-1px;left:-1px}.seat-cell .seat-empty{color:var(--gray-400);font-size:10px}.seat-cell:active:not(.disabled){transform:scale(.96)}@keyframes pulse-red{0%,to{box-shadow:0 0 #dc503c40}50%{box-shadow:0 0 0 4px #dc503c14}}.student-form .van-field{background:var(--surface);border-radius:var(--radius-md);margin-bottom:var(--space-2)}.student-form .van-field:after{border-color:var(--border)}.student-form .van-field .van-field__label{color:var(--text-primary);font-weight:500}.student-form .van-cell{background:var(--surface);border-radius:var(--radius-md);margin-bottom:var(--space-2)}.btn-primary{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);border-radius:var(--radius-md);color:#fff;transition:all var(--transition-fast);border:none;font-weight:600}.btn-primary:active{transform:translateY(1px);box-shadow:inset 0 2px 4px #0000001a}.btn-ghost{border:1.5px solid var(--border);border-radius:var(--radius-md);color:var(--text-secondary);transition:all var(--transition-fast);background:0 0;font-weight:500}.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}.podium{text-align:center;background:linear-gradient(135deg, var(--secondary) 0%, hsl(var(--secondary-hue), 35%, 25%) 100%);color:var(--text-inverse);padding:var(--space-2) 0;border-radius:var(--radius-sm);margin-bottom:var(--space-3);letter-spacing:6px;text-indent:6px;box-shadow:var(--shadow-sm);justify-content:center;align-items:center;gap:6px;font-size:12px;font-weight:600;display:flex}.podium svg{opacity:.8;width:14px;height:14px}.import-section{text-align:center;padding:var(--space-8) var(--space-4);border:2px dashed var(--border);border-radius:var(--radius-lg);background:var(--surface);transition:all var(--transition-base)}.import-section:hover{border-color:var(--primary);background:var(--primary-soft)}.import-section .import-icon{margin-bottom:var(--space-4);font-size:48px}.import-section .import-title{font-family:var(--font-display);color:var(--text-primary);margin-bottom:var(--space-2);font-size:18px;font-weight:600}.import-section .import-hint{color:var(--text-secondary);font-size:13px;line-height:1.6}.empty-state{text-align:center;padding:var(--space-10) var(--space-4)}.empty-state .empty-icon{width:80px;height:80px;margin:0 auto var(--space-5);background:var(--primary-soft);border-radius:var(--radius-xl);justify-content:center;align-items:center;font-size:36px;display:flex}.empty-state .empty-title{font-family:var(--font-display);color:var(--text-primary);margin-bottom:var(--space-2);font-size:18px;font-weight:600}.empty-state .empty-desc{color:var(--text-secondary);margin-bottom:var(--space-5);font-size:14px}.conflict-list{max-height:200px;overflow-y:auto}.conflict-list::-webkit-scrollbar{width:4px}.conflict-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:var(--radius-full)}.conflict-item{align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-3);margin-bottom:var(--space-2);background:var(--gray-50);border-radius:0 var(--radius-md) var(--radius-md) 0;transition:all var(--transition-fast);border-left:3px solid;display:flex}.conflict-item:hover{background:var(--primary-soft)}.conflict-item .conflict-type{white-space:nowrap;font-size:11px;font-weight:600}.conflict-item .conflict-detail{color:var(--text-secondary);font-size:12px}.student-card{padding:var(--space-4);background:var(--surface);border-radius:var(--radius-md);border:1px solid var(--border-light);transition:all var(--transition-fast);cursor:pointer}.student-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}.student-card .card-top{margin-bottom:var(--space-2);justify-content:space-between;align-items:center;display:flex}.student-card .card-top .student-name{font-family:var(--font-display);color:var(--text-primary);font-size:16px;font-weight:600}.student-card .card-top .card-tags{gap:var(--space-1);display:flex}.student-card .card-info{gap:var(--space-4);color:var(--text-secondary);font-size:13px;display:flex}.student-card .card-extra{margin-top:var(--space-2);padding-top:var(--space-2);border-top:1px solid var(--border-light);font-size:12px}.student-card .card-extra .avoid-info{color:var(--danger);margin-right:var(--space-3)}.student-card .card-extra .prefer-info{color:var(--primary)}.tag{border-radius:var(--radius-full);align-items:center;padding:2px 8px;font-size:11px;font-weight:500;display:inline-flex}.tag.tag-male{color:#1976d2;background:#e3f2fd}.tag.tag-female{color:#c2185b;background:#fce4ec}.tag.tag-leader{background:var(--primary-soft);color:var(--primary-dark)}.tag.tag-single{color:#e65100;background:#fff3e0}.form-popup{padding:var(--space-5);background:var(--bg-primary);min-height:100%}.form-popup .form-header{margin-bottom:var(--space-5);padding-bottom:var(--space-3);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;display:flex}.form-popup .form-header span{font-family:var(--font-display);color:var(--text-primary);font-size:18px;font-weight:600}.bottom-actions{gap:var(--space-3);margin-top:var(--space-5);padding:var(--space-4);background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);justify-content:center;display:flex}@media (width>=768px){.page-container{max-width:900px;padding:var(--space-6);margin:0 auto}.seat-cell .seat-name{font-size:13px}.seat-cell .seat-info{font-size:10px}.seat-cell .conflict-badge{font-size:8px}}@media (width>=1024px){.page-container{max-width:1200px;padding:var(--space-8)}.seat-cell .seat-name{font-size:14px}.seat-cell .seat-info{font-size:11px}}@media (width>=1440px){.page-container{max-width:1400px}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.loading-shimmer{background:linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeInUp var(--transition-slow) ease-out}.stagger-children>*{animation:fadeInUp var(--transition-slow) ease-out both}.stagger-children>:first-child{animation-delay:0s}.stagger-children>:nth-child(2){animation-delay:30ms}.stagger-children>:nth-child(3){animation-delay:60ms}.stagger-children>:nth-child(4){animation-delay:90ms}.stagger-children>:nth-child(5){animation-delay:.12s}.stagger-children>:nth-child(6){animation-delay:.15s}.stagger-children>:nth-child(7){animation-delay:.18s}.stagger-children>:nth-child(8){animation-delay:.21s}.stagger-children>:nth-child(9){animation-delay:.24s}.stagger-children>:nth-child(10){animation-delay:.27s}.stagger-children>:nth-child(11){animation-delay:.3s}.stagger-children>:nth-child(12){animation-delay:.33s}.stagger-children>:nth-child(13){animation-delay:.36s}.stagger-children>:nth-child(14){animation-delay:.39s}.stagger-children>:nth-child(15){animation-delay:.42s}.stagger-children>:nth-child(16){animation-delay:.45s}.stagger-children>:nth-child(17){animation-delay:.48s}.stagger-children>:nth-child(18){animation-delay:.51s}.stagger-children>:nth-child(19){animation-delay:.54s}.stagger-children>:nth-child(20){animation-delay:.57s}.stagger-children>:nth-child(21){animation-delay:.6s}.stagger-children>:nth-child(22){animation-delay:.63s}.stagger-children>:nth-child(23){animation-delay:.66s}.stagger-children>:nth-child(24){animation-delay:.69s}.stagger-children>:nth-child(25){animation-delay:.72s}.stagger-children>:nth-child(26){animation-delay:.75s}.stagger-children>:nth-child(27){animation-delay:.78s}.stagger-children>:nth-child(28){animation-delay:.81s}.stagger-children>:nth-child(29){animation-delay:.84s}.stagger-children>:nth-child(30){animation-delay:.87s}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--gray-300);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--gray-400)}.seat-grid-content{flex-direction:column;gap:6px;width:100%;display:flex}.seat-row{align-items:center;gap:6px;width:100%;display:flex}.seat-row>:not(.aisle-cell){flex:1;min-width:0}.seat-row>.aisle-cell{flex:0 0 4%;min-width:8px}.aisle-cell{justify-content:center;align-items:center;min-height:48px;display:flex}.aisle-cell .aisle-marker{background:repeating-linear-gradient(#ccc,#ccc 4px,#0000 4px 8px);border-radius:2px;width:6px;height:40px}.seat-cell-layout{aspect-ratio:1.2;cursor:pointer;background:#e8f5e9;border:2px solid #0000;border-radius:8px;justify-content:center;align-items:center;min-height:40px;transition:all .2s;display:flex}.seat-cell-layout:hover{transform:scale(1.05);box-shadow:0 2px 8px #00000026}.seat-cell-layout.disabled{cursor:default;background:#ebedf0}.seat-cell-layout.single-seat{background:#fff3e0;border-color:#ff976a}.seat-cell-layout.aisle-adjacent{border:1px dashed #90caf9}.seat-cell-layout.group-a{background:var(--group-color-a)}.seat-cell-layout.group-b{background:var(--group-color-b)}.seat-cell-layout.single-seat.group-a,.seat-cell-layout.single-seat.group-b{background:#fff3e0;border-color:#ff976a}.seat-cell-layout .seat-name-full{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:12px;font-weight:600;overflow:hidden}