/* 用户端样式 */
:root {
    --primary-color: #1890ff;
    --success-color: #52c41a;
    --error-color: #ff4d4f;
    --warning-color: #faad14;
    --text-color: #333;
    --text-secondary: #666;
    --border-color: #e8e8e8;
    --bg-color: #f5f5f5;
    --card-bg: #fff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container { max-width: 800px; margin: 0 auto; padding: 12px; }

/* 头部 */
.header {
    background: var(--card-bg);
    padding: 8px 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-title {
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
}

.header-right { display: flex; align-items: center; gap: 6px; }

.user-info {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
}

.user-level {
    background: var(--primary-color);
    color: #fff;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 10px;
}

.btn-text {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 12px;
    cursor: pointer;
    padding: 2px 4px;
}

/* 内容区 */
.content { padding-bottom: 50px; }

/* 登录页 */
.login-page {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    z-index: 100;
    padding-top: 60px;
    overflow-y: auto;
}

.login-box {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    width: 360px;
    max-width: 90%;
}

.login-box h1 { text-align: center; margin-bottom: 8px; font-size: 20px; }
.login-box .subtitle { text-align: center; color: var(--text-secondary); margin-bottom: 20px; font-size: 13px; }

/* 表单 */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; }
.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}
.form-group input:focus { outline: none; border-color: var(--primary-color); }

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 18px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn:hover { background-color: #40a9ff; }
.btn-success { background-color: var(--success-color); }
.btn-success:hover { background-color: #73d13d; }
.btn-outline { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-color); }
.btn-outline:hover { border-color: var(--primary-color); color: var(--primary-color); }
.btn-block { display: block; width: 100%; text-align: center; }

/* 领取卡片 */
.redeem-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.redeem-form { display: flex; flex-direction: column; gap: 12px; }

.select-group { display: flex; flex-direction: column; gap: 4px; }
.select-group label { font-weight: 500; font-size: 13px; }
.select-group select { padding: 10px; border: 1px solid var(--border-color); border-radius: 6px; font-size: 14px; }

/* 结果展示 */
.result-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 8px;
    padding: 14px;
    margin-top: 14px;
    display: none;
}

.result-card.show { display: block; animation: slideUp 0.3s ease; }

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-header { text-align: center; margin-bottom: 8px; }
.result-header h4 { font-size: 14px; margin-bottom: 4px; }

.result-code {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 1px;
    word-break: break-all;
    background: rgba(255,255,255,0.15);
    padding: 8px;
    border-radius: 6px;
    margin-bottom: 10px;
}

.result-details { margin-bottom: 10px; }
.result-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.result-row:last-child { border-bottom: none; }
.result-row .label { opacity: 0.8; }
.result-row .value { font-weight: 500; }

/* 合作规则 */
.rules-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 14px;
}

.rules-content { font-size: 13px; color: var(--text-secondary); }
.rules-content p { margin-bottom: 10px; line-height: 1.6; }

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    padding: 6px 8px;
    display: flex;
    gap: 6px;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.08);
}

.nav-btn {
    flex: 1;
    padding: 8px 4px;
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    text-align: center;
    color: var(--text-secondary);
}

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

.nav-btn-multi {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}
.nav-btn-multi .nav-btn-main {
    font-size: 12px;
    font-weight: 500;
}
.nav-btn-multi .nav-btn-sub {
    font-size: 9px;
    opacity: 0.8;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal {
    background: var(--card-bg);
    border-radius: 12px;
    width: 100%;
    max-width: 360px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 15px; }
.modal-close { background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text-secondary); }

.modal-body { padding: 16px; }
.modal-footer { padding: 12px 16px; border-top: 1px solid var(--border-color); display: flex; gap: 10px; }
.modal-footer .btn { flex: 1; font-size: 13px; padding: 8px; }

/* 操作指引提示卡片 */
.guide-tip-card {
    background: #fff;
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
.guide-tip-text {
    font-size: 14px;
    color: var(--text-color);
    margin-bottom: 12px;
    line-height: 1.5;
}
.guide-tip-image {
    text-align: center;
}
.guide-tip-image img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 历史记录统计模块 */
.history-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
    background: #fff;
    border-radius: 8px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
.history-stats .stats-item {
    flex: 1;
    min-width: 70px;
    text-align: center;
    padding: 8px 4px;
    background: #f8f8f8;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}
.history-stats .stats-item:hover {
    background: #e8e8e8;
}
.history-stats .stats-item.active {
    background: #1890ff;
    color: #fff;
}
.history-stats .stats-item.active .stats-label {
    color: rgba(255,255,255,0.85);
}
.history-stats .stats-item.active .stats-value {
    color: #fff;
}
.history-stats .stats-item.active .stats-sub {
    color: rgba(255,255,255,0.85);
}
.history-stats .stats-label {
    display: block;
    font-size: 10px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}
.history-stats .stats-value {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color);
    white-space: nowrap;
}
.history-stats .stats-sub {
    display: block;
    font-size: 9px;
    color: var(--text-secondary);
    margin-top: 1px;
    white-space: nowrap;
}

/* 历史记录列表 */
.history-list {
    padding: 0;
}
.history-item {
    background: #fff;
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.history-header .code {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}
.history-header .status {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
}
.history-header .status-claimed {
    background: #e6f7ff;
    color: #1890ff;
}
.history-header .status-unclaimed {
    background: #f5f5f5;
    color: #999;
}
.history-info {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.history-info:last-child {
    margin-bottom: 0;
}
.history-info b {
    color: var(--text-color);
}

/* Toast */
.toast-container {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    width: 90%;
    max-width: 320px;
}

.toast {
    background: var(--card-bg);
    padding: 12px 16px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    margin-bottom: 10px;
    animation: fadeIn 0.3s ease;
    font-size: 13px;
}

.toast-success { border-left: 4px solid var(--success-color); }
.toast-error { border-left: 4px solid var(--error-color); }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.copy-content { position: absolute; left: -9999px; opacity: 0; }