/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-black: #1a1a1a;
    --secondary-black: #2d2d2d;
    --dark-gray: #4a4a4a;
    --medium-gray: #8a8a8a;
    --light-gray: #d8d8d8;
    --off-white: #f5f5f5;
    --pure-white: #ffffff;
    --accent-green: #4caf50;
    --accent-red: #f44336;
    --accent-blue: #2196f3;
    --accent-orange: #ff9800;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--off-white);
    color: var(--primary-black);
    line-height: 1.5;
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 页面管理 */
.page {
    display: none;
    min-height: 100vh;
    background: var(--off-white);
}

.page.active {
    display: block;
}

/* 封面页 */
#cover-page {
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    display: none;
    min-height: 100vh;
    position: relative;
}

#cover-page.active {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.cover-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('meeting-room.jpg') center/cover no-repeat;
    opacity: 0.2;
}

.cover-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 40px 20px;
    width: 100%;
}

.logo-area {
    margin-bottom: 30px;
}

.logo-icon {
    font-size: 64px;
    color: var(--pure-white);
    margin-bottom: 10px;
}

.logo-area h1 {
    color: var(--pure-white);
    font-size: 32px;
    font-weight: 600;
    letter-spacing: 4px;
}

.subtitle {
    color: var(--medium-gray);
    font-size: 14px;
    margin-top: 8px;
    letter-spacing: 2px;
}

.cover-image {
    width: 100%;
    max-width: 320px;
    height: 200px;
    margin: 30px auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.cover-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.enter-btn {
    background: var(--pure-white);
    color: var(--primary-black);
    border: none;
    padding: 16px 48px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 2px;
}

.enter-btn:active {
    transform: scale(0.95);
    background: var(--light-gray);
}

/* 头部样式 */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--pure-white);
    border-bottom: 1px solid var(--light-gray);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left, .header-right {
    width: 40px;
}

.header-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-black);
}

.back-btn {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--primary-black);
    cursor: pointer;
    padding: 5px;
}

.header-spacer {
    width: 40px;
}

.date {
    font-size: 12px;
    color: var(--medium-gray);
}

/* 内容区域 */
.content {
    padding: 20px;
    padding-bottom: 80px;
}

/* 状态卡片 */
.status-card {
    display: flex;
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.status-item {
    flex: 1;
    text-align: center;
}

.status-label {
    display: block;
    font-size: 12px;
    color: var(--medium-gray);
    margin-bottom: 5px;
}

.status-value {
    display: block;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-black);
}

.status-divider {
    width: 1px;
    background: var(--light-gray);
    margin: 0 10px;
}

/* 功能网格 */
.function-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.function-card {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.function-card:active {
    transform: scale(0.95);
    background: var(--secondary-black);
}

.function-card:active .function-name,
.function-card:active .function-desc {
    color: var(--pure-white);
}

.function-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.function-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-black);
    margin-bottom: 5px;
}

.function-desc {
    font-size: 11px;
    color: var(--medium-gray);
    line-height: 1.3;
}

/* 快捷操作 */
.quick-actions {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-black);
    margin-bottom: 15px;
}

.quick-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quick-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--off-white);
    border: none;
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 14px;
    color: var(--primary-black);
    cursor: pointer;
    transition: all 0.2s ease;
}

.quick-btn:active {
    background: var(--light-gray);
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    display: flex;
    background: var(--pure-white);
    border-top: 1px solid var(--light-gray);
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
}

.nav-item {
    flex: 1;
    text-align: center;
    padding: 8px 0;
    cursor: pointer;
}

.nav-item.active .nav-icon {
    background: var(--primary-black);
    color: var(--pure-white);
}

.nav-icon {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    border-radius: 50%;
    font-size: 20px;
    transition: all 0.2s ease;
}

.nav-label {
    display: block;
    font-size: 11px;
    color: var(--medium-gray);
    margin-top: 4px;
}

/* 功能页面通用样式 */
.feature-highlight {
    background: linear-gradient(135deg, var(--secondary-black) 0%, var(--dark-gray) 100%);
    color: var(--pure-white);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    text-align: center;
}

.highlight-badge {
    display: inline-block;
    background: var(--accent-orange);
    color: var(--pure-white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 10px;
}

.feature-highlight p {
    font-size: 14px;
    opacity: 0.9;
}

/* 会议室列表 */
.meeting-filters {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-select {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--light-gray);
    border-radius: 8px;
    background: var(--pure-white);
    font-size: 14px;
    color: var(--primary-black);
}

.room-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.room-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--pure-white);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    cursor: pointer;
}

.room-card.occupied {
    opacity: 0.6;
}

.room-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
}

.room-info p {
    font-size: 12px;
    color: var(--medium-gray);
}

.room-status {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-badge.available {
    background: #e8f5e9;
    color: var(--accent-green);
}

.status-badge.occupied {
    background: #ffebee;
    color: var(--accent-red);
}

.book-btn {
    background: var(--primary-black);
    color: var(--pure-white);
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
}

.time-left {
    font-size: 12px;
    color: var(--medium-gray);
}

.quick-book-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-orange) 0%, #f57c00 100%);
    color: var(--pure-white);
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.3);
}

/* 差旅表单 */
.travel-form {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--medium-gray);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--light-gray);
    border-radius: 8px;
    font-size: 14px;
    color: var(--primary-black);
    background: var(--pure-white);
}

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

textarea.form-input {
    resize: vertical;
    min-height: 80px;
}

.submit-btn {
    width: 100%;
    background: var(--primary-black);
    color: var(--pure-white);
    border: none;
    padding: 14px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 10px;
}

/* 差旅结果 */
.travel-results {
    margin-top: 20px;
}

.result-card {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.result-badge {
    background: var(--off-white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.result-price {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-orange);
}

.result-detail p {
    font-size: 13px;
    color: var(--dark-gray);
    margin-bottom: 5px;
}

.select-btn {
    width: 100%;
    background: var(--pure-white);
    color: var(--primary-black);
    border: 2px solid var(--primary-black);
    padding: 10px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 12px;
}

/* 审批统计 */
.approval-stats {
    display: flex;
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.stat-item {
    flex: 1;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 600;
    color: var(--primary-black);
}

.stat-label {
    font-size: 12px;
    color: var(--medium-gray);
}

/* 审批标签 */
.approval-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    background: var(--pure-white);
    border: 1px solid var(--light-gray);
    padding: 10px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--medium-gray);
    cursor: pointer;
}

.tab-btn.active {
    background: var(--primary-black);
    color: var(--pure-white);
    border-color: var(--primary-black);
}

/* 审批列表 */
.approval-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.approval-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--pure-white);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.approval-icon {
    font-size: 32px;
}

.approval-content {
    flex: 1;
}

.approval-content h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.approval-content p {
    font-size: 12px;
    color: var(--medium-gray);
    margin-bottom: 4px;
}

.approval-time {
    font-size: 11px;
    color: var(--medium-gray);
}

.approval-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.action-btn {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border: none;
}

.action-btn.approve {
    background: #e8f5e9;
    color: var(--accent-green);
}

.action-btn.reject {
    background: #ffebee;
    color: var(--accent-red);
}

/* 搜索框 */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.search-input {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid var(--light-gray);
    border-radius: 12px;
    font-size: 14px;
    background: var(--pure-white);
}

.search-btn {
    background: var(--primary-black);
    color: var(--pure-white);
    border: none;
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 16px;
    cursor: pointer;
}

/* 文档分类 */
.doc-categories {
    margin-bottom: 25px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.category-item {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px 15px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.category-icon {
    display: block;
    font-size: 28px;
    margin-bottom: 8px;
}

.category-item span:last-child {
    font-size: 12px;
    color: var(--primary-black);
}

/* 文档列表 */
.recent-docs {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.doc-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.doc-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.doc-icon {
    font-size: 28px;
}

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

.doc-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-black);
}

.doc-meta {
    font-size: 11px;
    color: var(--medium-gray);
}

/* 打卡卡片 */
.checkin-card {
    background: linear-gradient(135deg, var(--secondary-black) 0%, var(--dark-gray) 100%);
    color: var(--pure-white);
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    margin-bottom: 25px;
}

.checkin-time {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 10px;
    font-variant-numeric: tabular-nums;
}

.checkin-status {
    font-size: 16px;
    opacity: 0.8;
    margin-bottom: 20px;
}

.checkin-btn {
    background: var(--pure-white);
    color: var(--primary-black);
    border: none;
    padding: 14px 40px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 15px;
}

.checkin-location {
    font-size: 12px;
    opacity: 0.7;
}

/* 请假表单 */
.leave-section {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* 请假历史 */
.leave-history {
    background: var(--pure-white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.history-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--light-gray);
}

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

.history-date {
    text-align: center;
    min-width: 50px;
}

.history-date .day {
    display: block;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-black);
}

.history-date .month {
    font-size: 12px;
    color: var(--medium-gray);
}

.history-info {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-type {
    font-size: 14px;
    color: var(--primary-black);
}

.history-status {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 20px;
}

.history-status.approved {
    background: #e8f5e9;
    color: var(--accent-green);
}

.history-status.pending {
    background: #fff3e0;
    color: var(--accent-orange);
}

/* 更多功能网格 */
.more-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.more-item {
    text-align: center;
}

.more-icon {
    display: block;
    font-size: 36px;
    margin-bottom: 8px;
}

.more-item span:last-child {
    font-size: 12px;
    color: var(--primary-black);
}

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

.page {
    animation: fadeIn 0.3s ease;
}

/* 响应式 */
@media (max-width: 360px) {
    .function-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .more-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}