body {
    background-color: #f2f2f2; /* 比原本灰淺少少，睇落舒服啲 */
  }
  
.page-title-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    margin-bottom: 20px;
}

.page-title-background {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.page-title {
    text-align: center;
    padding: 40px 0;
    font-size: 2.5rem;
    font-weight: bold;
    color: #fff;
    position: relative;
    z-index: 2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 400px; /* Ensures there's some space on the page */
}


.investment-hero {
    background: linear-gradient(135deg, #667eea, #764ba2); /* blue to purple */
    color: white;
    padding: 60px 30px;
    border-radius: 30px;
    text-align: center;
    margin: 40px auto;
    max-width: 1200px;
}

.investment-hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: bold;
}

.investment-hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    line-height: 1.6;
}

.investment-button {
    background: linear-gradient(to right, #00c853, #00bfa5); /* green to blue */
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s ease;
}

.investment-button:hover {
    background: linear-gradient(to right, #00e676, #1de9b6);
}

.gradient-divider {
    height: 2px;
    width: 100%;
    max-width: 1200px;
    margin: 30px auto 0 auto;
    background: linear-gradient(to right, rgba(102,126,234,0), #80d0c7, rgba(102,126,234,0));
}

.durability-section {
    text-align: center;
    padding: 80px 20px;
}

.section-header {
    margin-bottom: 50px;
    text-align: center; /*  */
}

.icon-circle {
    width: 50px;
    height: 50px;
    margin: 0 auto 10px auto;
    background: #e0f2ff;
    color: #2b7de9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #009688;
}

.card-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.durability-card {
    background: linear-gradient(145deg, #f5faff, #ffffff);
    border-radius: 16px;
    padding: 30px;
    width: calc(33.33% - 14px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: left;
    border-left: 6px solid #2b7de9;
}

.durability-card h3 {
    color: #1a57c8;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 15px;
}

.durability-card p {
    color: #333;
    font-size: 1rem;
    line-height: 1.6;
}

.durability-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}


/* 1. Gradient Text */
.gradient-title {
    font-size: 2rem;
    font-weight: bold;
    background: linear-gradient(to right, #0288d1, #43a047); /*  */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 2. Bouncing Animation */
@keyframes soft-bounce {
    0%, 100% {
        transform: translateY(0);
    }
    20% {
        transform: translateY(-14px); /*  */
    }
    40% {
        transform: translateY(-7px);  /*  */
    }
    60% {
        transform: translateY(-14px); /*  */
    }
    80% {
        transform: translateY(-4px);  /*  */
    }
}


.bounce-icon {
    animation: soft-bounce 3s ease-in-out infinite;
}


/* Section background */
/* reuse .card-container / .durability-card already defined */


.green-style {
    border-left: 6px solid #2e7d32; /*  */
    border-bottom: 4px solid #81c784; /*  */
}

.card-index {
    color: #2e7d32;
    font-size: 1.3rem;
    font-weight: bold;
    margin-right: 8px;
}

/* Gradient title in green */
.gradient-title-green {
    font-size: 2rem;
    font-weight: bold;
    background: linear-gradient(to right, #00c853, #009688); /*  */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;         /*  */
    display: inline-block;      /*  */
    margin: 0 auto;             /*  */
}


/*  */
.green-icon {
    color: #2e7d32;
}



.efficiency-section {
    text-align: center;
    padding: 60px 20px;
}

/*  +  */
.purple-icon {
    color: #8e24aa;
}

.gradient-title-purple {
    font-size: 2rem;
    font-weight: bold;
    background: linear-gradient(to right, #8e24aa, #00bcd4); /*  */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
    display: inline-block;
    margin: 0 auto;
}

/* 2+1  */
.efficiency-card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    max-width: 1100px;
    margin: 40px auto 20px;
}

.efficiency-card {
    display: flex;
    align-items: flex-start;
    background: linear-gradient(135deg, #faf5ff, #ffffff);
    border-radius: 16px;
    padding: 20px 25px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    flex: 1 1 calc(45% - 30px); /* 45%， */
    min-width: 300px;
    max-width: 500px;
}

/* Icon  */
.efficiency-icon {
    font-size: 24px;
    margin-right: 20px;
    margin-top: 5px;
}

/*  */
.blue-icon {
    color: #2962ff;
}
.green-icon {
    color: #00c853;
}
.purple-icon {
    color: #8e24aa;
}

/*  */
.efficiency-card h3 {
    font-size: 1.1rem;
    font-weight: bold;
    margin: 0 0 8px 0;
    text-align: left;
}

/*  */
.efficiency-card p {
    font-size: 0.95rem;
    color: #555;
    margin: 0;
    text-align: left;
}

/*  */
.efficiency-summary {
    max-width: 1000px;
    margin: 40px auto 0;
    font-size: 1rem;
    color: #333;
    line-height: 1.6;
}


/*  */
.sustainability-section {
    text-align: center;
    padding: 20px 20px 80px; /* 20px， */
}

/*  */
.sustainability-card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 40px auto 0 auto;
}

/*  */
.sustainability-card {
    background: linear-gradient(135deg, #f9fefb, #ffffff);
    border-radius: 16px;
    padding: 30px 20px;
    border: 1.5px solid #b2dfdb;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease;
}

.sustainability-card:hover {
    transform: translateY(-8px);
}

/* icon  */
.card-icon-box {
    width: 45px;
    height: 45px;
    margin: 0 auto 15px auto;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
}

/* 4  */
.green-bg { background-color: #00c853; }
.blue-bg { background-color: #2979ff; }
.orange-bg { background-color: #f9a825; }
.purple-bg { background-color: #9c27b0; }

.sustainability-card h3 {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.sustainability-card p {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.5;
}

/*  */
.cost-section {
    text-align: center;
    padding: 20px 20px 80px;
}

/* Gradient  */
.gradient-title-blue {
    font-size: 2rem;
    font-weight: bold;
    background: linear-gradient(to right, #2979ff, #00bcd4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
    display: inline-block;
    margin: 0 auto;
}

/* 3  */
.cost-card {
    background: linear-gradient(145deg, #f5faff, #e6f0ff);
    border-radius: 16px;
    padding: 30px;
    width: calc(33.33% - 14px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    text-align: left;
    border-left: 5px solid #1976d2;
}

.cost-card:hover {
    transform: translateY(-8px);
}

/*  */
.cost-blue {
    color: #1976d2;
    margin-right: 8px;
    font-weight: bold;
    font-size: 1.3rem;
}

.cost-card h3 {
    font-size: 1.2rem;
    font-weight: bold;
    color: #222;
    margin-bottom: 12px;
}

.cost-card p {
    font-size: 0.95rem;
    color: #444;
    line-height: 1.6;
}

/* CTA section */

.cta-section {
    text-align: center;
    padding: 20px 20px 80px; /* 20px， */
}

.cta-divider {
    height: 1px;
    background: #e0e0e0;
    border: none;
    margin-bottom: 40px;
    width: 100%;
    max-width: 1300px;
    margin-left: auto;
    margin-right: auto;
}

.cta-title {
    font-size: 1.8rem;
    font-weight: bold;
    color: #111;
    margin-bottom: 15px;
}

.cta-title strong {
    color: #0d47a1;
}

.cta-subtitle {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta-btn {
    font-size: 1rem;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
}

.primary-btn {
    background-color: #1a3ee4;
    color: white;
    box-shadow: 0 8px 20px rgba(26, 62, 228, 0.25);
}

.primary-btn:hover {
    background-color: #0026ca;
}

.outline-btn {
    border: 2px solid #1a3ee4;
    color: #1a3ee4;
    background-color: white;
}

.outline-btn:hover {
    background-color: #f5f7ff;
}