/* 垃圾焚烧发电科普平台样式表 */
:root {
    --primary-green: #2ecc71;
    --secondary-green: #27ae60;
    --light-green: #a8e6cf;
    --dark-green: #1e8449;
    --primary-blue: #3498db;
    --secondary-blue: #2980b9;
    --light-blue: #85c1e9;
    --dark-blue: #1f618d;
    --accent-orange: #e67e22;
    --accent-red: #e74c3c;
    --neutral-gray: #95a5a6;
    --light-gray: #ecf0f1;
    --dark-gray: #34495e;
    --white: #ffffff;
    --black: #2c3e50;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow-x: hidden;
}

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

/* 顶部导航栏 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 1.8rem;
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.logo h1 {
    font-size: 1.2rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary-green), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-green);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-green);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-gray);
    transition: var(--transition);
}

/* 主要内容区域 */
.main-content {
    margin-top: 80px;
}

/* Hero 区域 */
.hero {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-blue) 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    animation: slideInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: slideInUp 1s ease-out 0.2s backwards;
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    animation: slideInUp 1s ease-out 0.4s backwards;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-unit {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 通用章节样式 */
section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--dark-gray);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(45deg, var(--primary-green), var(--primary-blue));
    border-radius: 2px;
}

/* 工艺流程区域 */
.process-section {
    background: white;
    position: relative;
}

.process-visualization {
    margin-top: 2rem;
}

.process-flow {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.process-step {
    text-align: center;
    flex: 1;
    min-width: 150px;
    position: relative;
    padding: 1.5rem;
    border-radius: 15px;
    background: var(--light-gray);
    transition: var(--transition);
    cursor: pointer;
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    background: linear-gradient(45deg, var(--light-green), var(--light-blue));
}

.step-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.process-step h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
}

.process-step p {
    font-size: 0.9rem;
    color: var(--neutral-gray);
    margin-bottom: 1rem;
}

.step-arrow {
    font-size: 1.5rem;
    color: var(--primary-green);
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
}

.process-step:last-child .step-arrow {
    display: none;
}

.process-animation {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

#processCanvas {
    border: 2px solid var(--light-gray);
    border-radius: 10px;
    box-shadow: var(--shadow);
    background: white;
}

/* 能量计算器区域 */
.calculator-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.calculator-input, .calculator-output {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.calculator-input h3, .calculator-output h3 {
    margin-bottom: 1.5rem;
    color: var(--dark-gray);
    text-align: center;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-gray);
}

.input-group input, .input-group select {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.input-group input:focus, .input-group select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.input-group input[type="range"] {
    padding: 0;
}

.calculate-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(45deg, var(--primary-green), var(--secondary-green));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.3);
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    margin-bottom: 1rem;
    background: var(--light-gray);
    border-radius: 8px;
    border-left: 4px solid var(--primary-green);
}

.result-label {
    font-weight: 500;
    color: var(--dark-gray);
}

.result-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-green);
}

.result-unit {
    color: var(--neutral-gray);
    font-size: 0.9rem;
}

.energy-chart {
    margin-top: 2rem;
    text-align: center;
}

/* 环保对比区域 */
.environment-section {
    background: white;
}

.comparison-container {
    margin-top: 2rem;
}

.comparison-chart {
    text-align: center;
    margin-bottom: 3rem;
}

.comparison-chart h3 {
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.benefit-card p {
    color: var(--neutral-gray);
    line-height: 1.6;
}

/* 实时监控区域 */
.realtime-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.realtime-section .section-title {
    color: white;
}

.realtime-container {
    margin-top: 2rem;
}

.connection-status {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.status-offline {
    color: var(--accent-red);
}

.status-online {
    color: var(--primary-green);
}

.connect-btn {
    margin-left: 1rem;
    padding: 0.5rem 1rem;
    background: var(--primary-green);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
}

.connect-btn:hover {
    background: var(--secondary-green);
}

.realtime-data {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.data-panel {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 15px;
}

.data-panel h3 {
    margin-bottom: 1rem;
    text-align: center;
    color: white;
}

.data-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.data-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.data-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--light-green);
}

.data-unit {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-left: 0.3rem;
}

.realtime-chart {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
}

/* 科普知识区域 */
.education-section {
    background: var(--light-gray);
}

.knowledge-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    background: white;
    border: 2px solid var(--light-gray);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--dark-gray);
}

.tab-btn.active, .tab-btn:hover {
    background: var(--primary-green);
    color: white;
    border-color: var(--primary-green);
}

.tab-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.tab-pane h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-gray);
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.knowledge-item {
    padding: 1.5rem;
    background: var(--light-gray);
    border-radius: 10px;
    border-left: 4px solid var(--primary-blue);
}

.knowledge-item h4 {
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.knowledge-item p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* 底部区域 */
.footer {
    background: var(--dark-gray);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--light-green);
}

.footer-section p {
    line-height: 1.6;
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
        padding: 1rem 0;
        gap: 0;
    }

    .nav-menu li {
        padding: 0.8rem 1rem;
        border-bottom: 1px solid var(--light-gray);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .process-flow {
        flex-direction: column;
        align-items: center;
    }

    .process-step {
        width: 100%;
        max-width: 300px;
    }

    .step-arrow {
        right: 50%;
        top: auto;
        bottom: -20px;
        transform: translateX(50%) rotate(90deg);
    }

    .calculator-container {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .realtime-data {
        grid-template-columns: 1fr;
    }

    .knowledge-tabs {
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 2rem 0;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

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

    section {
        padding: 2rem 0;
    }

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

    .process-step {
        padding: 1rem;
    }

    .calculator-input, .calculator-output {
        padding: 1.5rem;
    }

    .tab-content {
        padding: 1.5rem;
    }

    .knowledge-item {
        padding: 1rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-green);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-green);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* 提示框样式 */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark-gray);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* 成功/错误提示 */
.toast {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: var(--transition);
    z-index: 2000;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.toast.success {
    background: var(--primary-green);
}

.toast.error {
    background: var(--accent-red);
}

.toast.info {
    background: var(--primary-blue);
}