/* ========================================
   血压记录助手 - 专业医疗健康UI设计
   设计理念：温暖、专业、可靠、易用
   ======================================== */

:root {
    /* 主色调 - 温暖的红色系 */
    --primary: #e63946;
    --primary-light: #ff6b6b;
    --primary-dark: #c1121f;
    --primary-soft: rgba(230, 57, 70, 0.1);

    /* 辅助色 */
    --success: #4caf50;
    --success-soft: rgba(76, 175, 80, 0.1);
    --warning: #ff9800;
    --warning-soft: rgba(255, 152, 0, 0.1);
    --danger: #f44336;
    --danger-soft: rgba(244, 67, 54, 0.1);
    --info: #2196f3;
    --info-soft: rgba(33, 150, 243, 0.1);

    /* 中性色 */
    --gray-50: #fafbfc;
    --gray-100: #f5f6f7;
    --gray-200: #e8e9eb;
    --gray-300: #d1d3d6;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* 背景色 */
    --bg-body: #f8fafc;
    --bg-sidebar: #ffffff;
    --bg-card: #ffffff;

    /* 文字色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-base: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* 动画 */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* ========================================
   页面容器
   ======================================== */

.page-container {
    width: 100%;
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* ========================================
   登录页面
   ======================================== */

.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
    gap: var(--spacing-xl);
}

.login-visual {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pulse-ring {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 2px solid var(--primary-light);
    border-radius: 50%;
    opacity: 0;
    animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.pulse-ring-delay {
    animation-delay: 1s;
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        opacity: 0.5;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

.heart-icon {
    position: relative;
    z-index: 1;
    width: 100px;
    height: 100px;
    color: var(--primary);
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.heart-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 4px 12px rgba(230, 57, 70, 0.3));
}

.login-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 420px;
    animation: slide-up 0.6s cubic-bezier(0.215, 0.61, 0.355, 1);
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.login-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 0.95rem;
}

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

/* ========================================
   输入框组件
   ======================================== */

.input-group {
    position: relative;
}

.input-group input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-base);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-body);
    transition: all var(--transition-base);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-card);
}

.input-group input:focus + .input-border {
    transform: scaleX(1);
}

.input-group label {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    transition: all var(--transition-base);
}

.input-group input:focus ~ label,
.input-group input:not(:placeholder-shown) ~ label {
    top: -10px;
    left: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--primary);
    background: var(--bg-card);
    padding: 0 var(--spacing-xs);
}

.input-border {
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
    transform-origin: left;
}

.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-base);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(230, 57, 70, 0.4);
}

.login-btn:active {
    transform: translateY(0);
}

.btn-arrow {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.login-btn:hover .btn-arrow {
    transform: translateX(4px);
}

.login-hint {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   主应用布局
   ======================================== */

.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ========================================
   侧边栏
   ======================================== */

.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-200);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    border-radius: var(--radius-base);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.brand-icon svg {
    width: 24px;
    height: 24px;
}

.brand-name {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.user-avatar svg {
    width: 24px;
    height: 24px;
}

.user-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.logout-link {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: color var(--transition-fast);
    text-align: left;
    padding: 0;
}

.logout-link:hover {
    color: var(--primary-dark);
}

/* 侧边栏导航 */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: none;
    border: none;
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 500;
}

.nav-icon {
    width: 20px;
    height: 20px;
}

/* ========================================
   主内容区
   ======================================== */

.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

.mobile-header {
    display: none;
}

.content-section {
    display: none;
    animation: fade-in 0.4s ease;
}

.content-section.active {
    display: block;
}

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

.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   记录表单
   ======================================== */

.record-form {
    max-width: 600px;
}

.form-row {
    margin-bottom: var(--spacing-lg);
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

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

.form-label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.label-unit {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.85rem;
}

.label-optional {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.85rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: var(--spacing-md);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
    z-index: 1;
}

.input-wrapper input,
.select-wrapper select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-md) 48px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-base);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-body);
    transition: all var(--transition-base);
}

.input-wrapper input:focus,
.select-wrapper select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-card);
}

.select-wrapper {
    position: relative;
}

.select-wrapper select {
    appearance: none;
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    background-size: 16px;
    padding-right: 48px;
}

.textarea-wrapper textarea {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-base);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-body);
    resize: vertical;
    transition: all var(--transition-base);
    line-height: 1.6;
}

.textarea-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-card);
}

.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-base);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
    margin-top: var(--spacing-md);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(230, 57, 70, 0.4);
}

.submit-btn:active {
    transform: translateY(0);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ========================================
   列表页面
   ======================================== */

.list-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.sync-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: -0.5rem 0 var(--spacing-md);
}

.clear-data-section {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-base);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.clear-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.clear-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
}

.clear-date-range {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.clear-date-range input[type="date"] {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

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

.clear-date-range span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.clear-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-clear-range,
.btn-clear-all {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
}

.btn-clear-range {
    background: var(--warning-soft);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.btn-clear-range:hover {
    background: var(--warning);
    color: white;
}

.btn-clear-all {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-clear-all:hover {
    background: var(--danger);
    color: white;
}

.filter-wrapper {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.filter-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
}

.filter-select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-left: 48px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-base);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-body);
    appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    background-size: 16px;
    padding-right: 48px;
    transition: all var(--transition-base);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-card);
}

.export-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-base);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.export-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-soft);
}

.export-btn svg {
    width: 18px;
    height: 18px;
}

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

.record-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-base);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
}

.record-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(4px);
}

.record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.record-date-time {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.record-date {
    font-weight: 600;
    color: var(--text-primary);
}

.record-time {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.bp-status {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

.status-normal {
    background: var(--success-soft);
    color: var(--success);
}

.status-elevated {
    background: var(--warning-soft);
    color: var(--warning);
}

.status-high {
    background: var(--danger-soft);
    color: var(--danger);
}

.record-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.value-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-base);
}

.value-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.value-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.value-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.record-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.medication-tag {
    background: var(--success-soft);
    color: var(--success);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.record-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.btn-delete {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--danger-soft);
    color: var(--danger);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-delete:hover {
    background: var(--danger);
    color: white;
}

/* ========================================
   统计页面
   ======================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-base);
    border: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.stat-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-primary .stat-icon-wrapper {
    background: var(--primary-soft);
    color: var(--primary);
}

.stat-danger .stat-icon-wrapper {
    background: var(--danger-soft);
    color: var(--danger);
}

.stat-info .stat-icon-wrapper {
    background: var(--info-soft);
    color: var(--info);
}

.stat-success .stat-icon-wrapper {
    background: var(--success-soft);
    color: var(--success);
}

.stat-icon-wrapper svg {
    width: 28px;
    height: 28px;
}

.stat-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-unit {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.charts-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.chart-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-base);
    border: 1px solid var(--gray-100);
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.chart-wrapper {
    position: relative;
    height: 300px;
}

.chart-empty-state {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    padding: var(--spacing-lg);
}

.chart-wrapper.has-no-data .chart-empty-state {
    display: flex;
}

.advice-card {
    background: linear-gradient(135deg, var(--info-soft), var(--success-soft));
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--gray-100);
}

.advice-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.advice-title svg {
    width: 24px;
    height: 24px;
    color: var(--info);
}

.advice-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.advice-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.advice-item strong {
    color: var(--text-primary);
}

/* ========================================
   空状态
   ======================================== */

.empty-state {
    text-align: center;
    padding: 60px var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--gray-200);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.empty-state-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ========================================
   Toast 提示
   ======================================== */

.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-base);
    font-size: 1rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: toast-in 0.3s cubic-bezier(0.215, 0.61, 0.355, 1);
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ========================================
   响应式设计
   ======================================== */

/* 平板 */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机 */
@media (max-width: 768px) {
    .page-container {
        padding: 0;
    }

    .login-wrapper {
        flex-direction: column;
        padding: var(--spacing-lg);
    }

    .login-visual {
        width: 160px;
        height: 160px;
    }

    .pulse-ring {
        width: 120px;
        height: 120px;
    }

    .heart-icon {
        width: 60px;
        height: 60px;
    }

    .login-card {
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
    }

    .login-title {
        font-size: 1.5rem;
    }

    .sidebar {
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        right: 0;
        width: 100%;
        height: auto;
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--gray-200);
        z-index: 1000;
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .sidebar-header {
        display: none;
    }

    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-md) 0;
        margin-bottom: var(--spacing-md);
        border-bottom: 1px solid var(--gray-200);
    }

    .mobile-brand {
        font-family: 'Noto Serif SC', serif;
        font-weight: 600;
        color: var(--text-primary);
    }

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

    .mobile-username {
        font-size: 0.9rem;
        color: var(--text-secondary);
    }

    .mobile-header .logout-link {
        min-height: 36px;
        padding: 0 var(--spacing-md);
    }

    .sidebar-nav {
        flex-direction: row;
        padding: var(--spacing-md);
        padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 0));
        gap: var(--spacing-xs);
        justify-content: space-around;
    }

    .nav-item {
        flex-direction: column;
        gap: var(--spacing-xs);
        padding: var(--spacing-md);
        min-height: 44px;
        min-width: 64px;
        justify-content: center;
        border-radius: var(--radius-base);
        font-size: 0.75rem;
    }

    .nav-icon {
        width: 24px;
        height: 24px;
    }

    .main-content {
        padding: var(--spacing-md);
        padding-top: calc(var(--spacing-md) + env(safe-area-inset-top, 0));
        padding-bottom: calc(140px + env(safe-area-inset-bottom, 0));
    }

    .record-form {
        padding-bottom: var(--spacing-xl);
    }

    .submit-btn {
        margin-bottom: var(--spacing-lg);
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .form-row-2 {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .list-controls {
        flex-direction: column;
    }

    .filter-wrapper {
        width: 100%;
    }

    .export-btn {
        width: 100%;
        justify-content: center;
    }

    .record-values {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

    .value-value {
        font-size: 1.25rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .stat-card {
        padding: var(--spacing-md);
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .chart-wrapper {
        height: 250px;
    }

    .toast {
        bottom: calc(80px + var(--spacing-lg));
    }

    .submit-btn,
    .export-btn,
    .btn-delete {
        min-height: 44px;
    }

    .input-wrapper input,
    .select-wrapper select {
        min-height: 44px;
    }
}

/* 小手机 */
@media (max-width: 480px) {
    body {
        font-size: 14px;
    }

    .login-card {
        padding: var(--spacing-md);
    }

    .login-title {
        font-size: 1.25rem;
    }

    .input-group input,
    .input-wrapper input,
    .select-wrapper select,
    .textarea-wrapper textarea {
        font-size: 16px;
    }

    .input-group input {
        padding: var(--spacing-md);
    }

    .input-group label {
        left: var(--spacing-md);
    }

    .input-group input:focus ~ label,
    .input-group input:not(:placeholder-shown) ~ label {
        left: var(--spacing-xs);
    }

    .section-header h2 {
        font-size: 1.25rem;
    }

    .section-header p {
        font-size: 0.85rem;
    }

    .record-item {
        padding: var(--spacing-md);
    }

    .record-values {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-xs);
    }

    .value-item {
        padding: var(--spacing-xs);
    }

    .value-value {
        font-size: 1rem;
    }

    .chart-wrapper {
        height: 200px;
    }

    .toast {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.9rem;
        bottom: var(--spacing-md);
    }
}

/* ========================================
   滚动条样式
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}