/* ===== 原有全部样式 + 新增PK/后台样式 + 手机适配 ===== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #ffffff;
    min-height: 100vh;
    color: #2d3748;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== 卡片 ===== */
.card {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.10);
}

.page-title {
    text-align: center;
    color: #2d3748;
    font-size: 2.5rem;
    margin-bottom: 30px;
    font-weight: 700;
    letter-spacing: 1px;
}

.section-title {
    color: #2d3748;
    font-size: 1.8rem;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 600;
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 25px;
}
.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2d3748;
    font-size: 1rem;
}
.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f7fafc;
}
.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.12);
    transform: translateY(-2px);
    background: #ffffff;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 15px 30px;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.35);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.50);
}
.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}
.btn-block {
    display: block;
    width: 100%;
}
.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}

/* ===== 加载动画 ===== */
.loading {
    position: relative;
    color: transparent !important;
}
.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== 结果容器（充值计算） ===== */
.result-container {
    background: #ffffff;
    border-radius: 15px;
    padding: 25px;
    margin-top: 30px;
    border-left: 4px solid #667eea;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}
.result-title {
    color: #2d3748;
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

/* ===== 支付页面 ===== */
.payment-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}
.payment-card {
    background: #ffffff;
    border-radius: 25px;
    padding: 40px;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.04);
    text-align: center;
}
.payment-header {
    margin-bottom: 30px;
}
.payment-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin: 10px 0;
}
.payment-account {
    color: #718096;
    font-size: 1.1rem;
}
.qr-container {
    background: #f7fafc;
    padding: 25px;
    border-radius: 20px;
    margin: 25px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    display: inline-block;
}
.qr-code {
    width: 220px;
    height: 220px;
    border-radius: 12px;
}
.payment-instructions {
    color: #4a5568;
    margin: 20px 0;
    line-height: 1.6;
}
.mobile-payment-link {
    display: inline-block;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    padding: 12px 25px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 15px;
    box-shadow: 0 4px 15px rgba(72, 187, 120, 0.35);
    transition: all 0.3s ease;
}
.mobile-payment-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(72, 187, 120, 0.50);
}

/* ===== 支付状态 ===== */
.payment-status {
    margin: 20px 0;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    font-weight: 600;
    transition: all 0.3s ease;
}
.status-checking {
    background: #e3f2fd;
    color: #1976d2;
    border-left: 4px solid #1976d2;
}
.status-success {
    background: #e8f5e8;
    color: #2e7d32;
    border-left: 4px solid #2e7d32;
}
.status-error {
    background: #ffebee;
    color: #c62828;
    border-left: 4px solid #c62828;
}
.retry-btn {
    background: #ff9800;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    margin: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.30);
}
.retry-btn:hover {
    background: #f57c00;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 152, 0, 0.45);
}
.retry-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ===== 活动横幅 ===== */
.activity-banner {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    border-radius: 20px;
    padding: 0;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.20);
    border: 1px solid rgba(255, 255, 255, 0.20);
    overflow: hidden;
}
.banner-content {
    display: flex;
    align-items: center;
    padding: 25px;
    color: white;
    position: relative;
}
.banner-icon {
    font-size: 3rem;
    margin-right: 20px;
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%,20%,50%,80%,100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}
.banner-text h3 {
    margin: 0 0 5px 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}
.banner-text p {
    margin: 0;
    font-size: 1.1rem;
    opacity: 0.95;
    color: #fff;
}
.banner-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.25);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    color: #fff;
}

/* ===== 网站链接卡片 ===== */
.website-link-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 0;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.04);
}
.website-link-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.10);
}
.website-link {
    display: flex;
    align-items: center;
    padding: 25px;
    text-decoration: none;
    color: inherit;
}
.website-link:hover {
    color: inherit;
    text-decoration: none;
}
.link-icon {
    font-size: 2.5rem;
    margin-right: 20px;
}
.link-content {
    flex: 1;
}
.link-content h3 {
    color: #2d3748;
    margin-bottom: 5px;
    font-size: 1.4rem;
}
.link-content p {
    color: #718096;
    margin: 0;
    font-size: 0.95rem;
}
.link-arrow {
    font-size: 1.5rem;
    color: #667eea;
    font-weight: bold;
}

/* ===== 关于我们 ===== */
.intro-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(0, 0, 0, 0.04);
}
.intro-title {
    color: #2d3748;
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
}
.intro-content {
    text-align: center;
}
.intro-content p {
    color: #4a5568;
    margin-bottom: 20px;
    line-height: 1.6;
}
.intro-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}
.feature-item {
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.25);
}
.feature-icon {
    margin-right: 8px;
    font-size: 1.1rem;
}

/* ===== 返回首页按钮 ===== */
.back-home-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.95);
    color: #2d3748;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}
.back-home-btn:hover {
    background: #ffffff;
    color: #667eea;
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.10);
    text-decoration: none;
}

/* ===== 消息提示（浮动） ===== */
.message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.10);
    z-index: 10001;
    border-left: 4px solid;
    animation: slideInRight 0.3s ease;
    max-width: 400px;
}
.message.success { border-left-color: #48bb78; }
.message.error { border-left-color: #f56565; }
.message.warning { border-left-color: #ed8936; }
.message.info { border-left-color: #4299e1; }
.message-content {
    display: flex;
    align-items: center;
    gap: 10px;
}
.message-icon {
    font-size: 1.2rem;
}
@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f0f2f5; border-radius: 10px; }
::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}
.pulse {
    animation: pulse 2s infinite;
}

/* ========== 新增 PK 样式 ========== */
/* 前端导航 */
.pk-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 15px 0;
    background: #fff;
    border-bottom: 2px solid #e2e8f0;
}
.pk-nav .nav-left {
    display: flex;
    align-items: center;
    gap: 25px;
    flex-wrap: wrap;
}
.pk-nav .nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}
.pk-nav a {
    font-family: 'Microsoft YaHei', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    color: #2d3748;
    text-decoration: none !important;
    padding: 6px 12px;
    border-radius: 8px;
    transition: background 0.2s, color 0.2s;
}
.pk-nav a:hover {
    background: #f0f4ff;
    color: #667eea;
}
.pk-nav .nav-brand {
    font-size: 1.3rem;
    color: #667eea;
}
.pk-nav .nav-user {
    font-weight: 600;
    color: #4a5568;
}
.pk-nav .nav-user::before {
    content: "👤 ";
}

/* 角色选择 */
.role-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
}
.role-item {
    background: #f7fafc;
    padding: 18px 30px;
    border-radius: 12px;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all 0.25s;
    min-width: 120px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    font-weight: 600;
}
.role-item:hover {
    border-color: #a0b4e0;
    background: #edf2ff;
    transform: scale(1.02);
}
.role-item.selected {
    border-color: #667eea;
    background: #e0e7ff;
    box-shadow: 0 0 0 4px rgba(102,126,234,0.2);
}
.role-item .name {
    font-size: 1.2rem;
}
.role-item .level {
    font-size: 0.9rem;
    color: #718096;
    margin-left: 8px;
}

/* 对阵图 - 淘汰赛样式 */
.bracket-wrapper {
    overflow-x: auto;
    padding: 20px 0;
}
.bracket {
    display: flex;
    flex-direction: row;
    gap: 40px;
    justify-content: center;
    min-width: fit-content;
}
.bracket-round {
    display: flex;
    flex-direction: column;
    gap: 30px;
    justify-content: center;
    position: relative;
}
.bracket-round .round-title {
    text-align: center;
    font-weight: 700;
    color: #4a5568;
    margin-bottom: 10px;
    font-size: 0.9rem;
    background: #edf2f7;
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
    align-self: center;
}
.match-card {
    background: #fff;
    border-radius: 12px;
    padding: 12px 18px;
    min-width: 160px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    border-left: 5px solid #667eea;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.match-card .players {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}
.match-card .vs {
    color: #a0aec0;
    font-weight: 700;
    margin: 0 6px;
}
.match-card .winner {
    color: #38a169;
    font-weight: 700;
    background: #e6fffa;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    align-self: flex-start;
}
.match-card .pending {
    color: #e53e3e;
    font-weight: 600;
    font-size: 0.85rem;
}
.match-card .byebye {
    color: #718096;
    font-style: italic;
}
/* 连接线 */
.bracket-round:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 2px;
    background: #a0aec0;
}
.bracket-round:not(:last-child)::before {
    content: "▶";
    position: absolute;
    right: -32px;
    top: 50%;
    transform: translateY(-50%);
    color: #a0aec0;
    font-size: 1.2rem;
}

/* 冠军框 */
.champion-box {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    padding: 25px;
    border-radius: 20px;
    text-align: center;
    margin: 20px 0;
    box-shadow: 0 8px 30px rgba(245,158,11,0.4);
    font-weight: 700;
    font-size: 1.4rem;
    color: #1a202c;
}

/* 状态标签 */
.status-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}
.status-0 { background: #e2e8f0; color: #4a5568; }
.status-1 { background: #bee3f8; color: #2a4365; }
.status-2 { background: #fefcbf; color: #744210; }
.status-3 { background: #c6f6d5; color: #22543d; }

/* 轮次导航 */
.round-nav {
    margin: 20px 0;
}
.round-nav a {
    margin-right: 10px;
    padding: 5px 15px;
    background: #e2e8f0;
    border-radius: 20px;
    text-decoration: none;
    color: #2d3748;
    transition: 0.3s;
}
.round-nav a:hover {
    background: #cbd5e0;
}
.round-nav a.active {
    background: #667eea;
    color: white;
}

/* ========== 后台导航 ========== */
.admin-nav {
    background: #2d3748;
    color: #fff;
    padding: 12px 20px;
    border-radius: 12px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}
.admin-nav .brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
}
.admin-nav .menu {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.admin-nav .menu a {
    color: #cbd5e0;
    text-decoration: none;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    transition: 0.3s;
}
.admin-nav .menu a:hover {
    background: #4a5568;
    color: #fff;
}
.admin-nav .menu a.active {
    background: #667eea;
    color: #fff;
}
.admin-nav .logout-btn {
    background: #e53e3e;
    color: #fff;
    padding: 6px 18px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
}
.admin-nav .logout-btn:hover {
    background: #c53030;
}
.admin-content {
    background: #fff;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* ========== 报名页面专用样式 ========== */
.register-time { font-size: 1.3rem; font-weight: 600; margin: 8px 0; }
.register-time span { background: #edf2f7; padding: 4px 12px; border-radius: 8px; }
.pk-start-time {
    font-size: 2.2rem;
    font-weight: 700;
    color: #e53e3e;
    background: #fff5f5;
    padding: 15px 20px;
    border-radius: 16px;
    border-left: 6px solid #e53e3e;
    margin: 20px 0;
    text-align: center;
}
.pk-start-time small { font-size: 1.2rem; font-weight: 400; color: #4a5568; }
.past-champions { margin-top: 40px; padding-top: 20px; border-top: 2px dashed #e2e8f0; }
.past-champions h3 { font-size: 1.5rem; margin-bottom: 15px; }
.champion-list { display: flex; flex-wrap: wrap; gap: 15px; }
.champion-item { background: #f7fafc; padding: 12px 20px; border-radius: 12px; border-left: 4px solid #f6ad55; transition: 0.2s; }
.champion-item:hover { background: #edf2f7; transform: translateY(-2px); }
.champion-item a { text-decoration: none; color: #2d3748; font-weight: 600; }
.champion-item .title { font-weight: 700; color: #2b6cb0; }
.champion-item .name { color: #e53e3e; }
.account-tip { background: #ebf8ff; padding: 12px 18px; border-radius: 10px; border-left: 4px solid #3182ce; margin-bottom: 20px; color: #2c5282; font-weight: 500; }
.action-buttons { display: flex; gap: 15px; margin-top: 25px; flex-wrap: wrap; }

/* ========== 手机适配 ========== */
@media (max-width: 768px) {
    /* 全局容器 */
    .container { padding: 15px; }
    
    /* 卡片 */
    .card { padding: 20px; border-radius: 15px; }
    .page-title { font-size: 2rem; }
    .section-title { font-size: 1.5rem; }
    
    /* 导航 */
    .pk-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 12px 0;
    }
    .pk-nav .nav-left, .pk-nav .nav-right {
        justify-content: center;
        gap: 12px;
    }
    .pk-nav a {
        font-size: 0.95rem;
        padding: 4px 10px;
    }
    .pk-nav .nav-brand { font-size: 1.1rem; }
    
    /* 横幅 */
    .banner-content {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    .banner-icon { margin-right: 0; margin-bottom: 15px; font-size: 2.5rem; }
    .banner-text h3 { font-size: 1.3rem; }
    .banner-text p { font-size: 1rem; }
    .banner-badge {
        position: relative;
        top: 0;
        right: 0;
        margin-top: 10px;
        display: inline-block;
    }
    
    /* 充值相关 */
    .payment-card { padding: 25px; }
    .payment-amount { font-size: 2rem; }
    .qr-code { width: 180px; height: 180px; }
    .back-home-btn {
        position: relative;
        top: 0;
        left: 0;
        display: inline-block;
        margin-bottom: 20px;
    }
    
    /* 特征列表 */
    .intro-features { gap: 10px; }
    .feature-item { padding: 8px 15px; font-size: 0.9rem; }
    
    /* 消息浮动 */
    .message { left: 20px; right: 20px; max-width: none; }
    
    /* ===== PK报名页面 ===== */
    .register-time { font-size: 1.1rem; }
    .pk-start-time {
        font-size: 1.6rem;
        padding: 12px 16px;
    }
    .pk-start-time small { font-size: 1rem; }
    
    /* 角色列表 - 两列 */
    .role-list { gap: 12px; }
    .role-item {
        padding: 14px 20px;
        min-width: calc(50% - 12px);
        flex: 1 1 calc(50% - 12px);
        font-size: 0.95rem;
    }
    .role-item .name { font-size: 1rem; }
    
    .action-buttons { justify-content: center; }
    .action-buttons .btn { flex: 1 1 100%; text-align: center; }
    
    /* 往期冠军 */
    .champion-list { gap: 10px; }
    .champion-item { padding: 10px 16px; font-size: 0.9rem; }
    
    /* ===== 对阵图页面 ===== */
    .bracket-wrapper { padding: 10px 0; }
    .bracket { gap: 25px; }
    .bracket-round { gap: 20px; }
    .match-card {
        padding: 12px 16px;
        min-width: 140px;
        font-size: 0.95rem;
    }
    .match-card .players { font-size: 1rem; }
    .match-card .winner, .match-card .pending { font-size: 0.85rem; }
    .champion-box { font-size: 1.2rem; padding: 20px; }
    .round-nav a { font-size: 0.95rem; padding: 4px 12px; margin-right: 6px; }
    .status-badge { font-size: 0.9rem; }
    .card h2 { font-size: 1.6rem !important; }
    .card p { font-size: 1rem !important; }
    
    /* 后台管理（如果手机访问） */
    .admin-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .admin-nav .menu { justify-content: center; }
    .admin-content { padding: 15px; }
}

@media (max-width: 480px) {
    .container { padding: 10px; }
    .card { padding: 15px; }
    .page-title { font-size: 1.8rem; }
    .section-title { font-size: 1.3rem; }
    .pk-nav a { font-size: 0.85rem; padding: 3px 8px; }
    .pk-nav .nav-left { gap: 8px; }
    .pk-nav .nav-right { gap: 8px; }
    
    /* 角色列表 - 单列 */
    .role-item {
        min-width: 100%;
        flex: 1 1 100%;
        padding: 12px 16px;
    }
    .pk-start-time { font-size: 1.3rem; padding: 10px 12px; }
    .pk-start-time small { font-size: 0.9rem; }
    .match-card { min-width: 120px; padding: 10px 12px; }
    .bracket { gap: 15px; }
    .bracket-round { gap: 15px; }
    .champion-box { font-size: 1rem; padding: 15px; }
    
    /* 按钮全宽 */
    .btn { padding: 12px 20px; font-size: 1rem; }
    .action-buttons .btn { flex: 1 1 100%; }
}