/* 题库自主训练智能系统 - Notion/Linear 风格 */

/* ========== 全局平滑动画 ========== */
html { scroll-behavior: smooth; }
body { transition: background-color 0.3s ease, color 0.3s ease; }
a, button, input { transition: all 0.2s ease; }

/* ========== CSS 变量 ========== */
:root {
    --primary: #4F8CFF;
    --primary-hover: #3D7AEF;
    --primary-light: rgba(79, 140, 255, 0.1);
    
    --bg-main: #F5F7FB;
    --bg-card: #FFFFFF;
    
    --border: #E5E7EB;
    --border-light: #F0F1F3;
    
    --text-title: #111827;
    --text-body: #374151;
    --text-secondary: #6B7280;
    --text-placeholder: #9CA3AF;
    
    --success: #22C55E;
    --success-bg: rgba(34, 197, 94, 0.1);
    --warning: #F59E0B;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --error: #EF4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --info: #3B82F6;
    --info-bg: rgba(59, 130, 246, 0.1);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    
    --radius-sm: 10px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* ========== 基础 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
    background: var(--bg-main);
    min-height: 100vh;
    padding: var(--spacing-lg) 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-body);
    line-height: 1.6;
    -webkit-user-select: none;
    user-select: none;
}

input, textarea { -webkit-user-select: auto; user-select: auto; }

a, button { transition: all 0.15s ease; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes spin { to { transform: rotate(360deg); } }

.fade-in { animation: fadeIn 0.4s ease-out; }

/* ========== 容器 ========== */
.container {
    max-width: 640px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    animation: fadeIn 0.3s ease-out;
}

@media (min-width: 768px) {
    .container { max-width: 720px; padding: 0 var(--spacing-lg); }
}

/* ========== 状态卡片 ========== */
.status-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
}

.status-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-title);
}

.btn-logout {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.btn-logout:hover {
    background: var(--error-bg);
    border-color: var(--error);
    color: var(--error);
}

.status-body {
    display: flex;
    align-items: center;
}

.status-avatar {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    object-fit: cover;
}

.status-info {
    margin-left: 14px;
}

.status-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-title);
}

.status-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* ========== 快速入口 ========== */
.quick-entry {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.section-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.entry-grid {
    display: flex;
    justify-content: space-around;
}

.entry-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    cursor: pointer;
}

.entry-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    color: #fff;
    font-size: 1.2rem;
}

.entry-icon.primary { background: var(--primary); }
.entry-icon.success { background: var(--success); }
.entry-icon.danger { background: var(--error); }
.entry-icon.info { background: var(--info); }

.entry-text {
    font-size: 0.8rem;
    color: var(--text-body);
    font-weight: 500;
}

.admin-entry {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-decoration: none;
}

.admin-entry:hover { color: var(--primary); }

/* ========== 排行榜卡片 ========== */
.rank-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.rank-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    background: var(--bg-main);
    font-weight: 600;
    color: var(--text-title);
}

.rank-header i { color: #FFA500; }

.rank-list { max-height: 280px; overflow-y: auto; }

.rank-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
}

.rank-item:last-child { border-bottom: none; }

.rank-medal {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    margin-right: 10px;
    flex-shrink: 0;
}

.rank-medal.gold { background: #FFD700; color: #fff; }
.rank-medal.silver { background: #C0C0C0; color: #fff; }
.rank-medal.bronze { background: #CD7F32; color: #fff; }
.rank-medal.normal { background: var(--bg-main); color: var(--text-secondary); }

.rank-avatar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    object-fit: cover;
    margin-right: 10px;
}

.rank-name {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-title);
}

.rank-score {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

/* ========== 排行榜弹窗 ========== */
.lb-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.lb-modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    width: 90%;
    max-width: 400px;
    max-height: 80vh;
    overflow: hidden;
}

.lb-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-main);
    font-weight: 600;
    color: var(--text-title);
    position: relative;
}

.lb-modal-header i { color: #FFA500; }

.lb-modal-close {
    position: absolute;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.lb-modal-close:hover {
    background: var(--error-bg);
    border-color: var(--error);
    color: var(--error);
}

.lb-modal-body {
    max-height: 400px;
    overflow-y: auto;
}

.lb-modal-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
}

.lb-modal-item:last-child { border-bottom: none; }

.lb-modal-medal {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    margin-right: 12px;
}

.lb-modal-medal.gold { background: #FFD700; color: #fff; }
.lb-modal-medal.silver { background: #C0C0C0; color: #fff; }
.lb-modal-medal.bronze { background: #CD7F32; color: #fff; }
.lb-modal-medal.normal { background: var(--bg-main); color: var(--text-secondary); }

.lb-modal-avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: cover;
    margin-right: 12px;
}

.lb-modal-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-title);
}

.lb-modal-score {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
}

/* ========== 训练类型弹窗 ========== */
.tr-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.tr-modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    width: 90%;
    max-width: 420px;
    overflow: hidden;
}

.tr-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-main);
    font-weight: 600;
    color: var(--text-title);
    position: relative;
}

.tr-modal-header i { color: var(--primary); font-size: 1.2rem; }

.tr-modal-close {
    position: absolute;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.tr-modal-close:hover {
    background: var(--error-bg);
    border-color: var(--error);
    color: var(--error);
}

.tr-modal-body {
    padding: 8px;
}

.tr-item {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-radius: 12px;
    margin: 8px;
    cursor: pointer;
    transition: all 0.15s;
    border: 1px solid var(--border);
}

.tr-item:hover {
    transform: translateX(4px);
}

.tr-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    margin-right: 14px;
}

.tr-info {
    flex: 1;
}

.tr-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-title);
}

.tr-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.tr-item.primary { background: rgba(79,140,255,0.05); }
.tr-item.primary:hover { border-color: var(--primary); }
.tr-item.primary .tr-icon { background: var(--primary); }

.tr-item.info { background: rgba(59,130,246,0.05); }
.tr-item.info:hover { border-color: var(--info); }
.tr-item.info .tr-icon { background: var(--info); }

.tr-item.warning { background: rgba(245,158,11,0.05); }
.tr-item.warning:hover { border-color: var(--warning); }
.tr-item.warning .tr-icon { background: var(--warning); }

.tr-item.secondary { background: rgba(124,58,237,0.05); }
.tr-item.secondary:hover { border-color: #7C3AED; }
.tr-item.secondary .tr-icon { background: #7C3AED; }

.tr-item.danger { background: rgba(239,68,68,0.05); }
.tr-item.danger:hover { border-color: var(--error); }
.tr-item.danger .tr-icon { background: var(--error); }

/* ========== PK对战页面 ========== */
.pk-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.pk-back, .pk-rank-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: transparent;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
}

.pk-back:hover, .pk-rank-btn:hover {
    background: var(--bg-main);
    color: var(--primary);
}

.pk-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-title);
}

.pk-user-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.pk-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
}

.pk-user-info { margin-left: 14px; }
.pk-user-name { font-size: 1rem; font-weight: 600; color: var(--text-title); }
.pk-user-qq { font-size: 0.8rem; color: var(--text-secondary); margin-top: 2px; }

.pk-rules {
    display: flex;
    justify-content: space-around;
    padding: 16px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.pk-rule-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.pk-rule-item i { font-size: 1.2rem; color: var(--primary); }
.pk-rule-item span { font-size: 0.8rem; color: var(--text-secondary); }

.pk-actions { margin-bottom: 16px; }

.pk-action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    cursor: pointer;
    margin-bottom: 12px;
}

.pk-action-card:hover { border-color: var(--error); }

.pk-action-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--error);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.pk-action-text { font-size: 1rem; font-weight: 600; color: var(--text-title); }
.pk-action-desc { font-size: 0.8rem; color: var(--text-secondary); margin-top: 4px; }

.pk-join-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--border);
}

.pk-join-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-title);
}

.pk-join-header i { color: var(--info); }

.pk-join-input {
    display: flex;
    gap: 8px;
}

.pk-join-input input {
    flex: 1;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-card);
    color: var(--text-body);
}

.pk-join-input input:focus {
    outline: none;
    border-color: var(--primary);
}

.pk-join-input button {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.pk-join-input button:hover { background: var(--primary-hover); }

.pk-room-card {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--primary);
    overflow: hidden;
}

.pk-room-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px;
    background: var(--primary-light);
    font-weight: 600;
    color: var(--primary);
}

.pk-room-body { padding: 16px; }

.pk-room-code {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    background: var(--bg-main);
    border-radius: 8px;
    margin-bottom: 16px;
}

.pk-room-code span { font-size: 0.85rem; color: var(--text-secondary); }
.pk-room-code strong { font-size: 1.1rem; color: var(--primary); font-weight: 700; }

.pk-room-players {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.pk-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px;
    background: var(--bg-main);
    border-radius: 10px;
    flex: 1;
}

.pk-player img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.pk-player span { font-size: 0.85rem; font-weight: 500; color: var(--text-title); }
.pk-player small { font-size: 0.7rem; color: var(--text-secondary); }

.pk-player-wait {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px;
    background: var(--bg-main);
    border-radius: 10px;
    flex: 1;
}

.pk-wait-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.pk-player-wait span { font-size: 0.85rem; color: var(--text-secondary); }

.pk-start-btn {
    width: 100%;
    padding: 14px;
    background: var(--success);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
}

.pk-start-btn:hover { background: #16A34A; }

/* ========== 用户主卡片 ========== */
.user-card-main {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.user-avatar-lg {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--primary), #7C9CFF);
    padding: 3px;
}

.user-details {
    flex: 1;
    margin-left: 16px;
}

.user-name-lg {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-title);
}

.user-qq-lg {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.btn-exit {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.btn-exit:hover {
    background: var(--error-bg);
    border-color: var(--error);
    color: var(--error);
}

/* ========== 功能菜单网格 ========== */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.menu-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.menu-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.menu-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.menu-icon i {
    font-size: 24px;
}

.menu-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 4px;
}

.menu-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.menu-primary .menu-icon { background: linear-gradient(135deg, var(--primary), #7C9CFF); color: #fff; }
.menu-primary:hover { border-color: var(--primary); }

.menu-secondary .menu-icon { background: linear-gradient(135deg, #6B7280, #9CA3AF); color: #fff; }
.menu-secondary:hover { border-color: #6B7280; }

.menu-danger .menu-icon { background: linear-gradient(135deg, var(--error), #F87171); color: #fff; }
.menu-danger:hover { border-color: var(--error); }

.menu-info .menu-icon { background: linear-gradient(135deg, var(--info), #60A5FA); color: #fff; }
.menu-info:hover { border-color: var(--info); }

.menu-dark .menu-icon { background: linear-gradient(135deg, #374151, #6B7280); color: #fff; }
.menu-dark:hover { border-color: #374151; }

/* ========== 排行榜盒子 ========== */
.leaderboard-box {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: 20px;
}

.lb-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: linear-gradient(135deg, rgba(79,140,255,0.1), rgba(124,158,237,0.1));
    cursor: pointer;
    font-weight: 600;
    color: var(--text-title);
}

.lb-header:hover { background: var(--primary-light); }

.lb-arrow { transition: transform 0.3s; }
.lb-arrow.open { transform: rotate(180deg); }

.lb-content {
    max-height: 300px;
    overflow-y: auto;
}

.lb-content .leaderboard-item {
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-light);
}

.lb-content .leaderboard-item:last-child { border-bottom: none; }

.lb-content .leaderboard-rank {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    margin-right: 12px;
}

.lb-content .rank-1 { background: linear-gradient(135deg, #FFD700, #FFA500); color: #fff; }
.lb-content .rank-2 { background: linear-gradient(135deg, #C0C0C0, #A0A0A0); color: #fff; }
.lb-content .rank-3 { background: linear-gradient(135deg, #CD7F32, #B87333); color: #fff; }
.lb-content .rank-other { background: var(--bg-main); color: var(--text-secondary); }

.lb-content .leaderboard-name { font-size: 0.85rem; font-weight: 500; color: var(--text-title); }
.lb-content .leaderboard-score { font-size: 0.9rem; font-weight: 700; color: var(--primary); margin-left: auto; }

/* ========== 页面标题 ========== */
.page-header {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.page-subtitle, .subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ========== 卡片 ========== */
.quiz-container, .card, .login-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
    .quiz-container, .card { padding: var(--spacing-xl); }
}

/* ========== 导航栏 ========== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    margin-bottom: var(--spacing-md);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-body);
    text-decoration: none;
}

.navbar-brand:hover { color: var(--primary); }

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.user-info { display: flex; flex-direction: column; }

.user-name {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-title);
}

.user-qq {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* ========== 按钮 ========== */
.btn {
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
}

.btn-primary { background: linear-gradient(135deg, var(--primary), #7C9CFF); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { background: linear-gradient(135deg, var(--primary-hover), #6B8CFF); transform: translateY(-1px); box-shadow: var(--shadow-lg); }

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-body);
    border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-main); }

.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--error); color: #fff; }
.btn-info { background: var(--info); color: #fff; }

.btn-lg { padding: 14px 28px; font-size: 1rem; width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ========== 登录页 ========== */
.login-card {
    max-width: 400px;
    margin: 0 auto;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-body);
}

.form-control {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    width: 100%;
    background: var(--bg-card);
    color: var(--text-body);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder { color: var(--text-placeholder); }

.login-btn { margin-top: var(--spacing-xs); }

.login-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-light);
    border-radius: var(--radius-sm);
}

/* ========== 统计卡片 ========== */
.stats-grid, .stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.stat-card, .stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.stat-card:hover, .stat-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.stat-icon { font-size: 1.5rem; margin-bottom: var(--spacing-xs); }
.stat-value { font-size: 1.5rem; font-weight: 600; color: var(--text-title); }
.stat-label { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }

/* ========== 训练说明 ========== */
.info-section {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    margin-bottom: var(--spacing-md);
}

.info-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-list {
    list-style: none;
    font-size: 0.85rem;
}

.info-list li {
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ========== 徽章 ========== */
.badge {
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
}

.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-secondary { background: rgba(124, 58, 237, 0.1); color: #7C3AED; }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--error-bg); color: var(--error); }
.badge-easy { background: var(--success-bg); color: var(--success); }

/* ========== 按钮组 ========== */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* ========== 排行榜 ========== */
.leaderboard-section { margin-top: var(--spacing-md); }

.leaderboard-header {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-title);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.leaderboard-header:hover { background: var(--bg-main); }

.leaderboard-list {
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.leaderboard-item:last-child { border-bottom: none; }

.leaderboard-rank {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    margin-right: var(--spacing-sm);
}
.first, .rank-1 { background: linear-gradient(135deg, #FFD700, #FFA500); color: #fff; box-shadow: 0 2px 8px rgba(255,215,0,0.3); }
.second, .rank-2 { background: linear-gradient(135deg, #C0C0C0, #A0A0A0); color: #fff; }
.third, .rank-3 { background: linear-gradient(135deg, #CD7F32, #B87333); color: #fff; }

.first, .rank-1 { background: #FEF3C7; color: #D97706; }
.second, .rank-2 { background: #E5E7EB; color: #6B7280; }
.third, .rank-3 { background: #FED7AA; color: #C2410C; }
.other, .rank-other { background: var(--bg-main); color: var(--text-secondary); }

.leaderboard-avatar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    margin-right: var(--spacing-sm);
}

.leaderboard-info { flex: 1; min-width: 0; }
.leaderboard-name { font-size: 0.85rem; font-weight: 500; color: var(--text-title); }
.leaderboard-meta { font-size: 0.7rem; color: var(--text-secondary); }
.leaderboard-score { font-size: 0.9rem; font-weight: 600; color: var(--primary); }

/* ========== 训练页 ========== */
.timer-display {
    background: var(--primary-light);
    color: var(--primary);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.timer-display.warning { background: var(--warning-bg); color: var(--warning); }
.timer-display.danger { background: var(--error-bg); color: var(--error); }

.progress-wrapper { flex: 1; min-width: 120px; max-width: 180px; }

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.progress { height: 4px; background: var(--border); border-radius: 2px; }
.progress-bar { background: var(--primary); height: 100%; border-radius: 2px; transition: width 0.3s; }

/* ========== 小圆圈指示器（顶部） ========== */
.question-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    padding: 12px 8px;
    margin-bottom: 8px;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: all 0.15s;
}

.dot:hover { transform: scale(1.3); background: var(--text-secondary); }

.dot.active {
    width: 14px;
    height: 14px;
    background: var(--primary);
}

.dot.answered {
    background: var(--success);
}

.dot.skipped {
    background: var(--error);
}

/* ========== 题目底部导航 ========== */
.question-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.btn-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--bg-main);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
}

.btn-nav:hover:not([disabled]) {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.btn-nav[disabled] { opacity: 0.3; cursor: not-allowed; }

.btn-nav.prev i { margin-right: 4px; }
.btn-nav.next i { margin-left: 4px; }

.btn-nav.submit {
    background: var(--success);
    border-color: var(--success);
    color: #fff;
    padding: 10px 24px;
}

.btn-nav.submit:hover { background: #16A34A; }

.progress-num {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    min-width: 50px;
    text-align: center;
}

/* ========== 双端适配 ========== */
@media (max-width: 480px) {
    .question-dots { padding: 10px 6px; gap: 5px; }
    .dot { width: 8px; height: 8px; }
    .dot.active { width: 12px; height: 12px; }
    
    .question-footer { padding: 10px 12px; gap: 6px; }
    .btn-nav { padding: 8px 12px; font-size: 0.85rem; }
    .btn-nav.submit { padding: 8px 16px; }
    .progress-num { font-size: 0.85rem; min-width: 40px; }
}

@media (min-width: 768px) {
    .question-dots { padding: 16px 12px; gap: 8px; }
    .dot { width: 12px; height: 12px; }
    .dot.active { width: 16px; height: 16px; }
    
    .question-footer { padding: 14px 24px; gap: 12px; }
    .btn-nav { padding: 12px 20px; font-size: 1rem; }
    .btn-nav.submit { padding: 12px 32px; }
}

/* ========== 返回确认弹窗 ========== */
.modal-sm { max-width: 260px; margin: auto; }

.mini-modal {
    border-radius: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.mini-modal-body {
    padding: 20px 16px 16px;
    text-align: center;
}

.mini-icon {
    font-size: 28px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.mini-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.mini-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.mini-modal-actions {
    display: flex;
    gap: 6px;
    padding: 6px 12px 12px;
    justify-content: center;
}

.mini-btn {
    flex: 1;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--bg-main);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
}

.mini-btn.cancel:hover { background: var(--bg-card); color: var(--text-primary); }

.mini-btn.confirm {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.mini-btn.confirm:hover { background: #3B7AE8; }

/* 手机端适配 */
@media (max-width: 480px) {
    .modal-sm { max-width: 220px; }
    .mini-modal-body { padding: 16px 12px 12px; }
    .mini-icon { font-size: 24px; margin-bottom: 8px; }
    .mini-title { font-size: 0.9rem; }
    .mini-desc { font-size: 0.7rem; }
    .mini-modal-actions { padding: 6px 10px 10px; gap: 5px; }
    .mini-btn { padding: 8px 12px; font-size: 0.8rem; }
}

/* 桌面端适配 */
@media (min-width: 768px) {
    .modal-sm { max-width: 280px; }
    .mini-modal-body { padding: 24px 20px 16px; }
    .mini-icon { font-size: 32px; margin-bottom: 12px; }
    .mini-title { font-size: 1rem; }
    .mini-desc { font-size: 0.8rem; }
    .mini-modal-actions { padding: 8px 16px 16px; gap: 8px; }
    .mini-btn { padding: 12px 18px; font-size: 0.9rem; }
}

/* ========== 题目指示器（旧样式保留兼容） ========== */
.question-indicators { display: none; }

/* ========== 题目卡片 ========== */
.question-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.question-info { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.question-score { font-size: 0.875rem; font-weight: 500; color: var(--primary); }
.question-content { font-size: 1rem; line-height: 1.7; color: var(--text-title); word-break: break-word; }

/* ========== 选项 ========== */
.options-list { display: flex; flex-direction: column; gap: var(--spacing-sm); }

.option-item {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    gap: var(--spacing-sm);
}

.option-item:hover { background: var(--bg-main); border-color: var(--primary); }
.option-item.selected { background: var(--primary-light); border-color: var(--primary); }

.option-letter {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    background: var(--bg-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.option-item.selected .option-letter { background: var(--primary); color: #fff; }
.option-text { font-size: 0.85rem; color: var(--text-body); line-height: 1.5; flex: 1; }
.option-item.selected .option-text { color: var(--text-title); }

/* ========== 多选题提示 ========== */
.multiple-hint {
    font-size: 0.8rem;
    color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

/* ========== 底部导航 ========== */
.bottom-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.nav-status { font-size: 0.8rem; color: var(--text-secondary); }

/* ========== 结果页 ========== */
.result-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.result-score { font-size: 4.5rem; font-weight: 800; color: var(--text-title); letter-spacing: -0.02em; }
.result-pass { color: var(--success); }
.result-fail { color: var(--error); }
.result-message { font-size: 1rem; color: var(--text-secondary); margin-top: var(--spacing-xs); }

.score-breakdown {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.score-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-main);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.score-item-label { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 4px; }
.score-item-value { font-size: 1.1rem; font-weight: 600; }
.score-item-value.single { color: var(--primary); }
.score-item-value.multiple { color: #7C3AED; }
.score-item-value.judge { color: var(--warning); }

/* ========== 错题回顾 ========== */
.review-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    border-left: 3px solid var(--error);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.review-question { font-size: 0.9rem; line-height: 1.6; color: var(--text-title); margin-bottom: var(--spacing-sm); }
.review-answer { display: flex; gap: var(--spacing-lg); font-size: 0.8rem; }
.your-answer { color: var(--error); }
.correct-answer { color: var(--success); }

/* ========== 弹窗 ========== */
.modal-content { border: 1px solid var(--border); border-radius: var(--radius-lg); }
.modal-header { padding: var(--spacing-md); background: var(--bg-card); border-bottom: 1px solid var(--border); }
.modal-title { font-size: 0.9rem; font-weight: 600; color: var(--text-title); }
.modal-body { padding: var(--spacing-lg); }
.modal-footer { padding: var(--spacing-md); border-top: 1px solid var(--border-light); }

/* ========== 加载 ========== */
.loading {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(245, 247, 251, 0.98);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading.show { display: flex; }
.loading:not(.show) { display: none; }

.loading-spinner { text-align: center; }
.loading-spinner i { font-size: 40px; color: var(--primary); animation: spin 1s linear infinite; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 主题按钮 ========== */
#themeBtn {
    position: fixed;
    top: var(--spacing);
    right: var(--spacing);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
}

#themeBtn:hover { background: var(--bg-main); }
#themeBtn i { color: var(--text-secondary); }

/* ========== Footer ========== */
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 0;
    text-align: center;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    z-index: 100;
}

.filing-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.filing-info a { color: var(--text-secondary); text-decoration: none; }
.filing-info a:hover { color: var(--primary); }
.filing-info .divider { color: var(--border); }

/* 为页面底部留出空间 */
.container { padding-bottom: 40px; }

/* ========== 响应式 ========== */
@media (max-width: 480px) {
    .container { padding: 0 var(--spacing-sm); }
    .stats-grid, .score-breakdown { gap: 6px; }
    .stat-item, .score-item { padding: var(--spacing-sm); }
    .result-score { font-size: 2.5rem; }
    .indicator { width: 24px; height: 24px; }
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--error); }
.mb-0 { margin-bottom: 0; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.w-100 { width: 100%; }
.hidden { display: none; }
/* ========== PK页面专用样式 ========== */
.pk-page {
    padding-bottom: 60px;
}

.pk-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 16px;
}

.pk-back, .pk-rank-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--bg-main);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 18px;
}

.pk-back:hover, .pk-rank-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.pk-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.pk-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 16px;
}

.pk-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.pk-user-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.pk-user-qq {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.pk-limit-card {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.pk-limit-item {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pk-limit-item strong {
    color: var(--primary);
    font-size: 1rem;
}

.pk-rules {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.pk-rule-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 12px;
    background: var(--bg-card);
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.pk-rule-item i {
    font-size: 20px;
    color: var(--primary);
}

.pk-actions {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
}

.pk-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
}

.pk-btn.create {
    background: var(--primary);
    color: #fff;
}

.pk-btn.create:hover { background: #3B7AE8; }
.pk-btn.create.disabled { background: var(--border); color: var(--text-secondary); cursor: not-allowed; }

.pk-btn.pay {
    background: #F59E0B;
    color: #fff;
    margin-top: 12px;
}

.pk-btn.join {
    background: var(--success);
    color: #fff;
    padding: 12px 20px;
}

.pk-input {
    flex: 1;
    padding: 12px 16px;
    border-radius: 10px;
    border: 2px solid var(--border);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
}

.pk-input:focus {
    border-color: var(--primary);
    outline: none;
}

/* 房间创建弹窗 */
.pk-modal .modal-body {
    padding: 24px;
}

.qr-section {
    margin-bottom: 20px;
}

.qr-container {
    display: inline-block;
    padding: 16px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.qr-hint {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.link-section {
    display: flex;
    gap: 8px;
}

.link-input {
    flex: 1;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 0.85rem;
    background: var(--bg-main);
}

.copy-btn {
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 0.85rem;
    border: none;
    cursor: pointer;
}

.copy-btn:hover { background: #3B7AE8; }

.waiting-status {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.waiting-status i {
    color: var(--warning);
}

/* 手机端适配 */
@media (max-width: 480px) {
    .pk-page { padding: 12px; }
    .pk-nav { padding: 10px 12px; }
    .pk-user-card { padding: 12px; }
    .pk-avatar { width: 40px; height: 40px; }
    .pk-limit-card { flex-direction: column; gap: 8px; }
    .pk-rules { gap: 8px; }
    .pk-rule-item { padding: 12px 8px; }
    .pk-actions { padding: 16px; }
    .pk-btn { padding: 12px; font-size: 0.9rem; }
.hot-label { background: #FEE2E2; color: #DC2626; padding: 4px 10px; border-radius: 20px; font-size: 0.8rem; margin-left: 8px; display: inline-flex; align-items: center; gap: 4px; }
.hot-label i { font-size: 0.9rem; }

/* ========== 赞助弹窗 ========== */
.sp-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.sp-modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    width: 90%;
    max-width: 420px;
    overflow: hidden;
    animation: fadeIn 0.3s ease-out;
}

.sp-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: linear-gradient(135deg, rgba(239,68,68,0.1), rgba(244,63,94,0.1));
    font-weight: 600;
    color: var(--text-title);
    position: relative;
}

.sp-modal-header i { color: #EC4899; font-size: 1.2rem; }

.sp-modal-close {
    position: absolute;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.sp-modal-close:hover {
    background: var(--error-bg);
    border-color: var(--error);
    color: var(--error);
}

.sp-modal-body {
    padding: 20px;
}

/* 赞助介绍卡片 */
.sp-intro-card {
    background: var(--bg-main);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
}

.sp-intro-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.sp-intro-title i { color: var(--info); }

.sp-intro-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sp-intro-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.sp-intro-num {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.sp-intro-text {
    font-size: 0.85rem;
    color: var(--text-body);
    line-height: 1.5;
}

/* 赞助按钮组 */
.sp-btn-group {
    display: flex;
    gap: 12px;
}

.sp-btn {
    flex: 1;
    padding: 14px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.sp-btn.sponsor {
    background: linear-gradient(135deg, #EC4899, #F43F5E);
    color: #fff;
}

.sp-btn.sponsor:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(236,72,153,0.3);
}

.sp-btn.leave {
    background: var(--bg-main);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.sp-btn.leave:hover {
    background: var(--border);
    color: var(--text-body);
}

/* 赞助金额选择 */
.sp-order-id {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding: 8px 12px;
    background: var(--bg-main);
    border-radius: 8px;
}

.sp-order-id strong { color: var(--primary); }

.sp-amount-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.sp-amount-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 8px;
    background: var(--bg-main);
    border-radius: 10px;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
}

.sp-amount-item:hover {
    border-color: var(--primary);
}

.sp-amount-item.active {
    border-color: #EC4899;
    background: rgba(236,72,153,0.1);
}

.sp-amount-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-title);
}

.sp-amount-item.active .sp-amount-value { color: #EC4899; }

.sp-amount-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 自定义金额 */
.sp-custom-amount {
    margin-bottom: 16px;
}

.sp-custom-amount label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: block;
}

.sp-custom-input {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    background: var(--bg-main);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.sp-custom-input span {
    font-size: 1rem;
    color: var(--text-title);
    font-weight: 600;
}

.sp-custom-input input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 1rem;
    color: var(--text-body);
    outline: none;
}

.sp-custom-input input:focus {
    border-color: var(--primary);
}

/* 确认赞助按钮 */
.sp-pay-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #EC4899, #F43F5E);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.sp-pay-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(236,72,153,0.3);
}

.sp-pay-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 赞助入口图标 - 粉色爱心 */
.entry-icon.sponsor {
    background: linear-gradient(135deg, #EC4899, #F43F5E) !important;
}

/* 支付二维码弹窗 */
.sp-qr-info { margin-bottom: 16px; }
.sp-qr-box {
    background: var(--bg-main);
    padding: 16px;
    border-radius: 12px;
    display: inline-block;
}
.sp-qr-btns { margin-top: 20px; display: flex; gap: 12px; justify-content: center; }

/* 手机端适配 */
@media (max-width: 480px) {
    .sp-modal-content { width: 95%; max-width: 360px; }
    .sp-modal-body { padding: 16px; }
    .sp-intro-card { padding: 12px; }
    .sp-intro-item { padding: 8px 10px; }
    .sp-intro-text { font-size: 0.8rem; }
    .sp-btn-group { flex-direction: column; gap: 8px; }
    .sp-btn { padding: 12px; font-size: 0.9rem; }
    .sp-amount-grid { grid-template-columns: repeat(3, 1fr); }
    .sp-amount-item:nth-child(4),
    .sp-amount-item:nth-child(5) { display: none; }
    .sp-amount-grid.show-all { grid-template-columns: repeat(5, 1fr); }
    .sp-amount-grid.show-all .sp-amount-item { display: flex; }
    .entry-grid { flex-wrap: wrap; gap: 12px; }
    .entry-item { width: calc(33.33% - 8px); }
}