/* ===========================
   全局樣式
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色調 */
    --primary-color: #EF5350;
    --primary-dark: #d32f2f;
    --primary-light: #ff6f6f;

    /* 輔助色 */
    --secondary-color: #2196F3;
    --accent-color: #FF9800;

    /* 中性色 */
    --dark: #1a1a1a;
    --gray-dark: #333333;
    --gray-medium: #666666;
    --gray-light: #f5f5f5;
    --white: #ffffff;

    /* 漸變色 */
    --gradient-primary: linear-gradient(135deg, #EF5350 0%, #FF6F6F 100%);
    --gradient-secondary: linear-gradient(135deg, #2196F3 0%, #42A5F5 100%);

    /* 字體 */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", "微軟正黑體", sans-serif;

    /* 間距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* 陰影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);

    /* 動畫 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   導航欄
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

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

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--gray-dark);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/* ===========================
   Hero 區域
   =========================== */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-content {
    text-align: center;
    color: var(--white);
    position: relative;
    z-index: 1;
}

.company-name-zh {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease;
}

.company-name-en {
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.slogan {
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: 4px;
    margin-top: var(--spacing-lg);
    animation: fadeInUp 1s ease 0.4s backwards;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 20px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--white);
    border-radius: 50%;
    animation: scroll 2s infinite;
}

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

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

@keyframes scroll {
    0% {
        opacity: 1;
        top: 10px;
    }
    100% {
        opacity: 0;
        top: 30px;
    }
}

/* ===========================
   通用區域樣式
   =========================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-sm);
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 0 auto;
    border-radius: 2px;
}

/* ===========================
   產品展示區
   =========================== */
.product-section {
    background: var(--white);
}

.product-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.product-logo {
    margin-bottom: var(--spacing-md);
}

.logo-image {
    width: 120px;
    height: 120px;
    object-fit: contain;
    filter: drop-shadow(var(--shadow-md));
}

.product-name {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.product-tagline {
    font-size: 1.3rem;
    color: var(--gray-medium);
    font-weight: 400;
}

/* APP 截圖與產品特色容器 */
.product-showcase-container {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
    justify-content: center;
    padding: var(--spacing-lg) 0;
}

/* APP 截圖展示 */
.app-showcase {
    flex: 0 0 auto;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    position: relative;
    min-width: 600px;
    min-height: 400px;
}

.app-screen {
    position: absolute;
    width: 200px;
    height: auto;
    border-radius: 16px;
    overflow: visible;
}

.app-screen:nth-child(1) {
    left: 0;
    top: 25px;
    z-index: 1;
}

.app-screen:nth-child(2) {
    left: 130px;
    top: 0;
    z-index: 2;
}

.app-screen:nth-child(3) {
    left: 260px;
    top: 20px;
    z-index: 3;
}

.app-screen img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

/* 產品特色卡片 */
.product-features {
    flex: 0 0 auto;
    width: 100%;
    max-width: 520px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto;
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid #eee;
}

.feature-card:nth-child(1) {
    grid-column: 1 / -1;
}

.feature-card:nth-child(2) {
    grid-column: 1;
    grid-row: 2;
}

.feature-card:nth-child(3) {
    grid-column: 2;
    grid-row: 2;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 55px;
    height: 55px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    color: var(--white);
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--gray-medium);
    line-height: 1.7;
    font-size: 1rem;
}

/* 用戶流程區域 */
.user-flow-section {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--gray-light);
    border-radius: 16px;
}

.flow-section-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--gray-dark);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.flow-step {
    flex: 0 0 auto;
    text-align: center;
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    min-width: 200px;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-sm);
}

.step-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    font-size: 0.9rem;
    color: var(--gray-medium);
}

.flow-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* ===========================
   關於我們區域
   =========================== */
.about-section {
    background: var(--gray-light);
}

.about-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.about-text {
    font-size: 1.2rem;
    color: var(--gray-medium);
    line-height: 2;
    max-width: 900px;
    margin: 0 auto;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.about-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.about-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-secondary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.about-icon svg {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    color: var(--gray-medium);
    line-height: 1.8;
}

.about-team {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.team-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.team-description {
    color: var(--gray-medium);
    line-height: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

/* ===========================
   頁腳區域
   =========================== */
.footer-section {
    background: var(--gray-dark);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-brand h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.footer-slogan {
    font-size: 1.1rem;
    opacity: 0.8;
    letter-spacing: 2px;
}

.footer-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.info-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-light);
}

.info-item p {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    line-height: 1.8;
}

.info-item .email-line {
    display: block;
}

.info-item .email-line svg {
    display: inline-block;
    vertical-align: middle;
    margin-right: var(--spacing-xs);
}

.info-item .email-line .label {
    display: inline;
}

.info-item .email-line a {
    display: inline;
    word-break: keep-all;
    white-space: nowrap;
}

.info-item svg {
    flex-shrink: 0;
    margin-top: 4px;
}

.info-item a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition-fast);
}

.info-item a:hover {
    color: var(--primary-light);
}

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

/* ===========================
   動畫效果
   =========================== */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* 滾動時淡入效果 */
.scroll-fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}