:root {
    --primary-color: #e53935;
    --secondary-color: #1e88e5;
    --background-color: #f5f5f5;
    --surface-color: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --accent-color: #ffc107;
}

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

body {
    font-family: 'Noto Sans TC', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    overflow-x: hidden;
}

/* 導航欄 */
header {
    background-color: var(--surface-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.header-hidden {
    transform: translateY(-100%);
}

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

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 25px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* 主視覺區域 */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('/api/placeholder/1200/600') center/cover no-repeat;
    display: flex;
    align-items: center;
    margin-top: 65px;
}

.hero-content {
    color: white;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    animation: fadeInUp 1.2s ease;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    animation: fadeInUp 1.4s ease;
}

.btn {
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #c62828;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(229, 57, 53, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.2);
}

/* 統計數字區域 */
.stats {
    background-color: var(--surface-color);
    padding: 60px 0;
}

.stats-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

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

/* 專案說明 */
.project-info {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.section-title p {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: var(--surface-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* 時間線預覽 */
.timeline-preview {
    background-color: var(--surface-color);
    padding: 80px 0;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 40px auto 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--secondary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
    border-radius: 10px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: var(--surface-color);
    border: 4px solid var(--secondary-color);
    border-radius: 50%;
    top: 15px;
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -12px;
}

.timeline-item:nth-child(even)::after {
    left: -12px;
}

.timeline-content {
    padding: 20px;
    background-color: var(--surface-color);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.timeline-date {
    color: var(--secondary-color);
    font-weight: 500;
}

.timeline-text {
    margin-top: 10px;
}

.timeline-cta {
    text-align: center;
    margin-top: 40px;
}

/* 使用者回報區 */
.report-section {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.report-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.step-card {
    background-color: var(--surface-color);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
}

.step-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 15px 0;
}

/* 最新更新區 */
.recent-updates {
    padding: 80px 0;
}

.updates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.update-card {
    background-color: var(--surface-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.update-image {
    height: 200px;
    background-color: #ddd;
}

.update-content {
    padding: 20px;
}

.update-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.update-location {
    font-weight: 700;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.update-status {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 20px;
    color: white;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.status-verified {
    background-color: #43a047;
}

.status-new {
    background-color: var(--primary-color);
}

.status-updated {
    background-color: var(--secondary-color);
}

.update-info {
    margin-bottom: 15px;
    color: var(--text-secondary);
}

/* 合作單位 */
.partners {
    padding: 80px 0;
    background-color: var(--surface-color);
}

.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-top: 40px;
}

.partner-logo {
    height: 50px;
    filter: grayscale(1);
    opacity: 0.7;
    transition: all 0.3s;
}

.partner-logo:hover {
    filter: grayscale(0);
    opacity: 1;
}

/* 頁尾 */
footer {
    background-color: #263238;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.footer-logo i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-links h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
}

.footer-links h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #b0bec5;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s;
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    color: #b0bec5;
    font-size: 0.9rem;
}

/* 返回頂部按鈕 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s;
    opacity: 0;
    visibility: hidden;
    box-shadow: 0 3px 10px rgba(229, 57, 53, 0.3);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #c62828;
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(229, 57, 53, 0.5);
}

/* 計數器動畫 */
@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 緩進動畫 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 響應式設計 */
@media screen and (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 65px;
        left: 0;
        width: 100%;
        height: 0;
        background-color: var(--surface-color);
        flex-direction: column;
        align-items: center;
        overflow: hidden;
        transition: height 0.3s;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        height: calc(100vh - 65px);
        padding: 30px 0;
    }

    .nav-links li {
        margin-left: 0;
        margin-bottom: 20px;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-content h1 {
        font-size: 2.3rem;
    }

    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item:nth-child(even) {
        left: 0;
    }

    .timeline-item::after {
        left: 20px;
    }

    .timeline-item:nth-child(odd)::after {
        right: auto;
        left: 20px;
    }
}

/* 適應更小的螢幕 */
@media screen and (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .stat-number {
        font-size: 2rem;
    }
}

/* 通知橫幅 */
.notification-banner {
    background-color: var(--accent-color);
    color: var(--text-primary);
    padding: 10px 0;
    position: relative;
    text-align: center;
    font-weight: 500;
}

.notification-close {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-primary);
}