/* style.css - 專案核心樣式定義 (清新、留白、現代感) */

:root {
    --primary-color: #5db7de; /* 清爽的海藍色 */
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f9fbff; /* 略帶淡淡藍意的背景白 */
    --bg-white: #ffffff;
    --transition: all 0.3s ease;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

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

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

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    overflow: hidden;
}

/* Header & Nav */
header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
}

.logo i {
    margin-right: 0.5rem;
}

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

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

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(93, 183, 222, 0.05) 0%, rgba(255, 255, 255, 1) 100%);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-white);
    padding: 0.8rem 2.2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(93, 183, 222, 0.3);
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(93, 183, 222, 0.4);
}

/* Features Section */
.features {
    padding: 4rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Footer */
footer {
    padding: 3rem 0;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* RWD 響應式優化 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .nav-links {
        display: none; /* 手機端暫時隱藏，或改為漢堡選單 */
    }
}