/* ===== Reset & Variables ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
    --primary:#2563eb;--primary-light:#eff6ff;--primary-dark:#1d4ed8;
    --bg:#f8fafc;--card-bg:#fff;--text:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;
    --border:#e2e8f0;
    --shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
    --shadow-lg:0 10px 25px -5px rgba(0,0,0,.08),0 4px 6px rgba(0,0,0,.04);
    --radius:16px;--radius-sm:10px;--radius-full:999px;
}

/* ===== Dark Mode ===== */
.dark-mode{
    --primary:#3b82f6;--primary-light:#1e3a5f;--primary-dark:#60a5fa;
    --bg:#0f172a;--card-bg:#1e293b;--text:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;
    --border:#334155;
    --shadow:0 1px 3px rgba(0,0,0,.3),0 1px 2px rgba(0,0,0,.2);
    --shadow-lg:0 10px 25px -5px rgba(0,0,0,.4),0 4px 6px rgba(0,0,0,.3);
}

/* ===== Base ===== */
body{font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','Helvetica Neue',sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}
.container{max-width:1440px;margin:0 auto;padding:24px 20px 80px}

/* ===== Header ===== */
.header{text-align:center;padding:40px 0 32px}
.header h1{font-size:2.2rem;font-weight:800;letter-spacing:-.5px;background:linear-gradient(135deg,#1e40af,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.header p{color:var(--text-secondary);margin-top:8px;font-size:1rem}
.header .stats{display:inline-flex;gap:16px;margin-top:16px;background:var(--card-bg);padding:8px 20px;border-radius:var(--radius-full);box-shadow:var(--shadow);font-size:.85rem;color:var(--text-secondary)}
.header .stats span{font-weight:600;color:var(--primary)}
.header .date-note{margin-top:12px;font-size:.8rem;color:var(--text-muted)}

/* ===== Filter Panel ===== */
.filter-panel{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 24px;margin-bottom:24px}
.filter-section{margin-bottom:16px}.filter-section:last-child{margin-bottom:0}
.filter-label{font-size:.8rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px;display:flex;align-items:center;gap:6px;cursor:pointer;user-select:none}
.filter-label:hover{color:var(--primary)}
.filter-label .arrow{font-size:.6rem;transition:transform .2s ease;margin-left:4px;display:inline-block}
.filter-section.collapsed .arrow{transform:rotate(-90deg)}
.filter-section.collapsed .filter-tags{display:none}
.filter-count{font-weight:400;text-transform:none;color:var(--text-muted);font-size:.75rem}
.filter-tags{display:flex;flex-wrap:wrap;gap:8px}

/* ===== Tags ===== */
.tag{padding:6px 16px;border-radius:var(--radius-full);font-size:.85rem;font-weight:500;cursor:pointer;transition:all .15s ease;border:1.5px solid var(--border);background:var(--bg);color:var(--text-secondary);user-select:none}
.tag:hover{border-color:#cbd5e1;background:#f1f5f9;transform:translateY(-1px)}
.tag.active{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 2px 8px rgba(37,99,235,.25)}
.tag.active:hover{background:var(--primary-dark)}
.tag.cpu{background:#fef3c7;color:#92400e;border-color:#fde68a}
.tag.cpu.active{background:#d97706;color:#fff;border-color:#d97706}
.tag.screen{background:#fdf2f8;color:#db2777;border-color:#fbcfe8}
.tag.screen.active{background:#db2777;color:#fff;border-color:#db2777}

/* ===== Active Bar ===== */
.active-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:12px 16px;background:var(--primary-light);border-radius:var(--radius-sm);margin-bottom:20px;min-height:44px}
.active-bar .label{font-size:.8rem;font-weight:600;color:var(--primary)}
.active-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background:var(--card-bg);border-radius:var(--radius-full);font-size:.8rem;font-weight:500;box-shadow:var(--shadow)}
.active-badge .x{cursor:pointer;color:var(--text-muted);font-weight:700}.active-badge .x:hover{color:#ef4444}
.clear-btn{margin-left:auto;background:none;border:none;color:var(--text-muted);font-size:.8rem;cursor:pointer;text-decoration:underline}.clear-btn:hover{color:#ef4444}

/* ===== Toolbar ===== */
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;flex-wrap:wrap;gap:12px}
.result-info{font-size:.9rem;color:var(--text-secondary)}.result-info strong{color:var(--primary);font-size:1.1rem}
.toolbar-right{display:flex;align-items:center;gap:12px}
.sort-select{padding:8px 16px;border:1.5px solid var(--border);border-radius:var(--radius-full);font-size:.85rem;background:var(--card-bg);cursor:pointer;outline:none}.sort-select:focus{border-color:var(--primary)}

/* ===== Compare Mode Button ===== */
.compare-mode-btn{padding:8px 16px;border:1.5px solid var(--primary);border-radius:var(--radius-full);font-size:.85rem;background:transparent;color:var(--primary);cursor:pointer;transition:all .15s}
.compare-mode-btn:hover{background:var(--primary-light)}
.compare-mode-btn.active{background:var(--primary);color:#fff}

/* ===== Phone Grid ===== */
.phone-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}

/* ===== Phone Card ===== */
.phone-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:all .25s ease;border:1px solid var(--border);display:flex;flex-direction:column}
.phone-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cbd5e1}
.phone-card.compare-selected{box-shadow:0 0 0 2px #7c3aed,var(--shadow-lg);border-color:#7c3aed}
.phone-card.compare-clickable{cursor:pointer;border:1.5px solid rgba(124,58,237,.25)}
.phone-card.compare-clickable:hover{border-color:#7c3aed;box-shadow:0 0 0 2px rgba(124,58,237,.2),var(--shadow-lg)}

.card-header{padding:20px 20px 0;display:flex;justify-content:space-between;align-items:flex-start}
.phone-name{font-size:1.1rem;font-weight:700;color:var(--text);line-height:1.3}
.card-header-right{display:flex;gap:8px;align-items:center;flex-shrink:0}
.brand-badge{padding:3px 10px;border-radius:var(--radius-full);font-size:.7rem;font-weight:600;background:var(--primary-light);color:var(--primary);white-space:nowrap}
/* ===== Brand Colors ===== */
.brand-apple{background:#f1f5f9;color:#1e293b;border:1px solid #cbd5e1}
.brand-华为{background:#fef2f2;color:#dc2626;border:1px solid #fecaca}
.brand-小米{background:#fff7ed;color:#ea580c;border:1px solid #fed7aa}
.brand-OPPO{background:#f0fdf4;color:#16a34a;border:1px solid #bbf7d0}
.brand-vivo{background:#faf5ff;color:#7c3aed;border:1px solid #e9d5ff}
.brand-三星{background:#eff6ff;color:#2563eb;border:1px solid #bfdbfe}
.brand-荣耀{background:#fdf2f8;color:#db2777;border:1px solid #fbcfe8}
.brand-REDMI{background:#fef3c7;color:#d97706;border:1px solid #fde68a}
.brand-iQOO{background:#ecfdf5;color:#059669;border:1px solid #a7f3d0}
.brand-一加{background:#fefce8;color:#a16207;border:1px solid #fef08a}
.brand-真我{background:#f5f3ff;color:#6d28d9;border:1px solid #ddd6fe}
.brand-红魔{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca}
.brand-ROG{background:#f8fafc;color:#475569;border:1px solid #e2e8f0}
.brand-索尼{background:#f0f9ff;color:#0284c7;border:1px solid #bae6fd}
.price-badge{padding:3px 10px;border-radius:var(--radius-full);font-size:.8rem;font-weight:700;background:#fef2f2;color:#dc2626;border:1px solid #fecaca;white-space:nowrap}
.card-body{padding:16px 20px;flex:1}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.spec-cell{padding:8px 10px;background:var(--bg);border-radius:var(--radius-sm)}
.spec-cell .label{font-size:.7rem;color:var(--text-muted);margin-bottom:2px}
.spec-cell .value{font-size:.82rem;font-weight:600;color:var(--text)}

/* ===== Card Expand ===== */
.card-expand{margin-top:10px;text-align:center}
.expand-btn{background:none;border:1px solid var(--border);border-radius:var(--radius-full);padding:4px 16px;font-size:.75rem;color:var(--text-secondary);cursor:pointer;transition:all .15s}
.expand-btn:hover{border-color:var(--primary);color:var(--primary)}
.card-details{display:none;margin-top:12px}
.card-details.open{display:block}

.detail-section{padding:12px;background:var(--bg);border-radius:var(--radius-sm);margin-bottom:8px}
.detail-title{font-size:.75rem;font-weight:600;color:var(--primary);margin-bottom:8px;display:flex;align-items:center;gap:4px}
.detail-row{font-size:.75rem;color:var(--text-secondary);margin-bottom:4px;line-height:1.4}
.detail-row strong{color:var(--text);font-weight:600}

/* ===== Card Footer ===== */
.card-footer{padding:14px 20px;display:flex;flex-wrap:wrap;gap:6px}
.feature-tag{padding:3px 10px;border-radius:var(--radius-full);font-size:.72rem;font-weight:500;background:#f0fdf4;color:#16a34a;border:1px solid #bbf7d0}
.feature-tag.purple{background:#faf5ff;color:#7c3aed;border-color:#e9d5ff}
.feature-tag.amber{background:#fffbeb;color:#d97706;border-color:#fde68a}
.feature-tag.blue{background:#eff6ff;color:#2563eb;border-color:#bfdbfe}
.feature-tag.fold{background:#fdf2f8;color:#db2777;border-color:#fbcfe8}
.feature-tag.cpu{background:#fef3c7;color:#92400e;border-color:#fde68a}
.feature-tag.green{background:#ecfdf5;color:#059669;border-color:#a7f3d0}
.feature-tag.red{background:#fef2f2;color:#dc2626;border-color:#fecaca}

/* ===== Compare Bar (底部固定选择栏) ===== */
.compare-bar{position:fixed;bottom:0;left:0;right:0;background:var(--card-bg);box-shadow:0 -4px 20px rgba(0,0,0,.15);border-top:1px solid var(--border);z-index:100;animation:slideUp .3s ease}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.compare-bar-inner{display:flex;align-items:center;gap:16px;padding:12px 24px;max-width:1440px;margin:0 auto}
.compare-bar-info{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-secondary);white-space:nowrap}
.compare-bar-count strong{color:var(--primary);font-size:1rem}
.compare-bar-selected{display:flex;align-items:center;gap:8px;flex:1;overflow-x:auto}
.compare-bar-selected .selected-chip{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;background:var(--primary-light);color:var(--primary);border-radius:var(--radius-full);font-size:.8rem;white-space:nowrap}
.compare-bar-selected .selected-chip .remove{cursor:pointer;font-weight:700;opacity:.6}
.compare-bar-selected .selected-chip .remove:hover{opacity:1}
.compare-bar-actions{display:flex;align-items:center;gap:8px;white-space:nowrap}
.compare-bar-start{padding:8px 20px;border:none;border-radius:var(--radius-full);font-size:.85rem;background:var(--primary);color:#fff;cursor:pointer;font-weight:600;transition:all .15s}
.compare-bar-start:disabled{background:var(--border);color:var(--text-muted);cursor:not-allowed}
.compare-bar-start:not(:disabled):hover{background:var(--primary-dark)}
.compare-bar-clear{padding:8px 16px;border:1px solid var(--border);border-radius:var(--radius-full);font-size:.85rem;background:transparent;color:var(--text-secondary);cursor:pointer}
.compare-bar-clear:hover{border-color:var(--text-muted);color:var(--text-muted)}
.compare-bar-close{padding:8px;border:none;background:none;font-size:1.2rem;cursor:pointer;color:var(--text-muted)}
.compare-bar-close:hover{color:var(--text)}

/* ===== Compare Panel (全屏弹窗) ===== */
.compare-panel{position:fixed;top:0;left:0;right:0;bottom:0;z-index:200}
.compare-panel-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.compare-panel-content{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:95%;max-width:1400px;max-height:90vh;background:var(--card-bg);border-radius:20px;box-shadow:0 25px 80px rgba(0,0,0,.4);display:flex;flex-direction:column;overflow:hidden}
.compare-panel-header{display:flex;align-items:center;justify-content:space-between;padding:20px 28px;border-bottom:2px solid var(--border);background:linear-gradient(135deg,var(--primary-light),#fff)}
.compare-panel-header h3{font-size:1.3rem;font-weight:800;background:linear-gradient(135deg,var(--primary),#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.compare-panel-close{padding:10px 14px;border:none;background:var(--bg);font-size:1.4rem;cursor:pointer;color:var(--text-muted);border-radius:12px;transition:all .2s}
.compare-panel-close:hover{background:var(--primary);color:#fff;transform:rotate(90deg)}
.compare-panel-body{flex:1;overflow-y:auto;padding:20px 28px;background:var(--bg)}
.compare-table{width:100%;border-collapse:separate;border-spacing:0;font-size:.9rem;background:var(--card-bg);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.compare-table thead{background:linear-gradient(135deg,var(--primary),var(--primary-dark))}
.compare-table th{padding:16px 20px;text-align:center;color:#fff;font-weight:700;border-bottom:2px solid var(--primary-dark);position:sticky;top:0;z-index:10}
.compare-table th:first-child{text-align:left;background:var(--primary);border-right:2px solid var(--primary-dark)}
.compare-table td{padding:14px 18px;text-align:center;border-bottom:1px solid var(--border);vertical-align:middle;transition:background .2s}
.compare-table td:first-child{text-align:left;font-weight:600;color:var(--text-secondary);background:var(--bg);border-right:2px solid var(--border);position:sticky;left:0;z-index:5}
.compare-table tr:hover td{background:var(--primary-light)}
.compare-table tr:nth-child(even) td{background:#fafafa}
.compare-table tr:nth-child(even):hover td{background:var(--primary-light)}
.compare-remove{background:linear-gradient(135deg,#fee2e2,#fecaca);border:none;color:#dc2626;cursor:pointer;font-size:.85rem;padding:6px 12px;border-radius:8px;font-weight:600;transition:all .2s;margin-top:8px}
.compare-remove:hover{background:linear-gradient(135deg,#dc2626,#b91c1c);color:#fff;transform:scale(1.05)}
.compare-table td .highlight{color:var(--primary);font-weight:700;background:var(--primary-light);padding:4px 8px;border-radius:6px;display:inline-block}
.compare-table td .best{color:#059669;font-weight:700;background:#d1fae5;padding:4px 8px;border-radius:6px;display:inline-block}

/* ===== Loading / Error ===== */
.loading,.no-results,.error-msg{grid-column:1/-1;text-align:center;padding:80px 20px;color:var(--text-muted)}
.loading .spinner{font-size:2rem;animation:spin 1s linear infinite;display:inline-block}
.no-results .emoji,.error-msg .emoji{font-size:3rem;margin-bottom:16px}
.no-results p,.error-msg p{font-size:1rem}
.error-msg{color:#dc2626}

/* ===== Back to Top ===== */
.back-top{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow-lg);transition:all .15s;z-index:50;display:flex;align-items:center;justify-content:center}
.back-top:hover{background:var(--primary-dark);transform:translateY(-2px)}

/* ===== Footer ===== */
footer{text-align:center;padding:40px 0;font-size:.8rem;color:var(--text-muted)}

/* ===== Animations ===== */
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

/* ===== Dark Mode Toggle ===== */
.dark-mode-toggle{position:fixed;top:20px;right:20px;width:44px;height:44px;border-radius:50%;background:var(--card-bg);color:var(--text);border:2px solid var(--border);font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow-lg);transition:all .3s;z-index:100;display:flex;align-items:center;justify-content:center}
.dark-mode-toggle:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:scale(1.1)}
.dark-mode-toggle:active{transform:scale(0.95)}
.dark-mode .dark-mode-toggle{background:var(--primary);color:#fff;border-color:var(--primary-dark)}

/* ===== Radar Chart ===== */
#radarChartContainer{display:flex;justify-content:center;align-items:center;padding:20px;background:var(--card-bg);border-radius:12px;margin-bottom:20px;box-shadow:var(--shadow)}
#radarChart{max-width:100%;height:auto}

/* ===== Responsive ===== */
@media(max-width:768px){
    .container{padding:16px 12px 60px}
    .header h1{font-size:1.6rem}
    .header p{font-size:.9rem}
    .phone-grid{grid-template-columns:1fr}
    .filter-panel{padding:16px}
    .spec-grid{grid-template-columns:1fr}
    
    /* 移动端对比面板优化 */
    .compare-panel-content{width:95%;max-height:95vh;border-radius:16px}
    .compare-panel-header{padding:16px 20px}
    .compare-panel-header h3{font-size:1.1rem}
    .compare-panel-body{padding:12px 16px}
    .compare-table{font-size:.7rem}
    .compare-table th{padding:10px 8px;font-size:.75rem}
    .compare-table td{padding:8px 6px;font-size:.7rem}
    .compare-table th:first-child,.compare-table td:first-child{min-width:80px}
    .compare-remove{padding:4px 8px;font-size:.75rem;margin-top:4px}
    
    /* 移动端筛选优化 */
    .filter-tags{gap:6px}
    .tag{padding:5px 12px;font-size:.8rem}
    
    /* 移动端按钮优化 */
    .compare-mode-btn{padding:8px 16px;font-size:.9rem}
    .sort-select{padding:6px 12px;font-size:.85rem}
    
    /* 移动端暗色模式按钮位置调整 */
    .dark-mode-toggle{top:16px;right:16px;width:40px;height:40px;font-size:1.1rem}
}