/* ===================================
   居家太陽光電屋頂專案 - 樣式表
   ================================== */

/* === 基礎設定 === */
:root {
    /* 色彩變數 */
    --primary-color: #f59e0b;
    --primary-dark: #d97706;
    --secondary-color: #fbbf24;
    --dark-gray: #1f2937;
    --medium-gray: #374151;
    --light-gray: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --black: #000000;

    /* 漸層 */
    --gradient-gold: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
    --gradient-dark: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(31, 41, 55, 0.85) 0%, rgba(55, 65, 81, 0.75) 100%);

    /* 陰影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(245, 158, 11, 0.3);

    /* 間距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* 字型 */
    --font-primary: 'Noto Sans TC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

/* === 導覽列 === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(31, 41, 55, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: var(--spacing-xs) 0;
    background: rgba(31, 41, 55, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--white);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(245, 158, 11, 0.1);
}

.nav-link.cta-nav {
    background: var(--gradient-gold);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 25px;
}

.nav-link.cta-nav:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

/* === Hero Section === */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('assets/hero.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-overlay);
    z-index: 1;
}

.hero-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(251, 191, 36, 0.1) 0%, transparent 50%);
    animation: pulseGlow 4s ease-in-out infinite;
}

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

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

/* === 按鈕樣式 === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transform: translateY(-3px);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.btn-block {
    width: 100%;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.btn-icon {
    font-size: 1.2em;
}

/* === 滾動提示 === */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    color: var(--white);
    animation: bounce 2s infinite;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--white);
    border-radius: 15px;
    margin: 0 auto var(--spacing-xs);
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(15px); }
}

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

/* === 通用區塊樣式 === */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--dark-gray);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-gold);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--light-gray);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* === 關於我們區塊 === */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.highlight {
    color: var(--primary-color);
    font-weight: 700;
}

.mt-4 {
    margin-top: var(--spacing-xl);
}

.process-steps {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.step:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.step-number {
    min-width: 45px;
    height: 45px;
    background: var(--gradient-gold);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.2rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--light-gray);
    margin: 0;
}

.about-gallery {
    display: flex;
    align-items: center;
}

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

.gallery-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    cursor: pointer;
}

.gallery-grid img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.gallery-placeholder {
    grid-column: 1 / -1;
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    text-align: center;
    color: var(--light-gray);
    border: 2px dashed var(--light-gray);
}

/* === 方案區塊 === */
.plans {
    background: var(--white);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.plan-card {
    background: var(--white);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    position: relative;
    border: 2px solid transparent;
}

.plan-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.plan-featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.featured-badge {
    position: absolute;
    top: -15px;
    right: var(--spacing-lg);
    background: var(--gradient-gold);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-md);
}

.plan-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.plan-title {
    font-size: 1.8rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.plan-description {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-lg);
    min-height: 60px;
}

.plan-features {
    margin-bottom: var(--spacing-lg);
}

.feature {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    color: var(--medium-gray);
}

.feature-icon {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
    min-width: 20px;
}

.plan-highlight {
    background: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
}

/* === 案例展示區塊 === */
.cases {
    background: var(--bg-light);
}

.cases-slider {
    position: relative;
    margin-top: var(--spacing-xl);
    overflow: hidden;
}

.case-placeholder {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: 12px;
    text-align: center;
    color: var(--light-gray);
}

.slider-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.slider-btn {
    width: 50px;
    height: 50px;
    background: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-btn:hover {
    background: var(--gradient-gold);
    color: var(--white);
    transform: scale(1.1);
}

/* === 表單區塊 === */
.contact-form {
    background: var(--white);
}

.evaluation-form {
    max-width: 800px;
    margin: var(--spacing-xl) auto 0;
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--dark-gray);
    font-weight: 600;
}

.required {
    color: #ef4444;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--light-gray);
    font-size: 0.9rem;
}

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

.radio-group {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    transition: var(--transition-normal);
}

.radio-label:hover {
    border-color: var(--primary-color);
    background: rgba(245, 158, 11, 0.05);
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--light-gray);
    border-radius: 50%;
    position: relative;
    transition: var(--transition-normal);
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--white);
    border-radius: 50%;
}

.radio-label input[type="radio"]:checked ~ .radio-text {
    color: var(--primary-color);
    font-weight: 600;
}

.form-message {
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-top: var(--spacing-md);
    text-align: center;
}

.form-message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.form-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* === 聯絡區塊 === */
.contact {
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.contact-info h3 {
    font-size: 1.8rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
}

.info-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
}

.info-icon {
    font-size: 1.5rem;
    min-width: 30px;
}

.info-content h4 {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xs);
}

.info-content p {
    color: var(--medium-gray);
}

.social-links {
    margin-top: var(--spacing-xl);
}

.social-links h4 {
    margin-bottom: var(--spacing-md);
    color: var(--dark-gray);
}

.social-icons {
    display: flex;
    gap: var(--spacing-md);
}

.social-icon {
    width: 45px;
    height: 45px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

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

.social-icon.facebook:hover {
    background: #1877f2;
    color: var(--white);
}

.social-icon.line:hover {
    background: #06c755;
    color: var(--white);
}

.social-icon.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: var(--white);
}

.contact-map iframe {
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
}

/* === Footer === */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-lg) 0;
}

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

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    margin-left: var(--spacing-md);
    transition: var(--transition-fast);
}

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

/* === 回到頂部按鈕 === */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--gradient-gold);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* === 響應式設計 === */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(31, 41, 55, 0.98);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-xl);
        transition: var(--transition-normal);
        gap: var(--spacing-md);
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

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

    .radio-group {
        flex-direction: column;
    }

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

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

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .evaluation-form {
        padding: var(--spacing-md);
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* === 能源流動動畫 === */
@keyframes energyFlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.energy-line {
    background: var(--gradient-gold);
    background-size: 200% 200%;
    animation: energyFlow 3s ease infinite;
    height: 3px;
    border-radius: 2px;
}