/* style.css - 視覺優化版 (設計顧問：手寫感的純粹美學) */

/* --- 1. 配色與屬性定義 --- */
:root {
    --primary: #FFDE42;
    --primary-soft: rgba(255, 222, 66, 0.1); /* 主色低飽和度淺色版 */
    --black: #1A1A1A;
    --white: #FFFFFF;
    
    /* 藝文氣息：增加深色漸層感 */
    --bg-gradient: linear-gradient(135deg, #FFFFFF 0%, #F5F7FA 100%);
    
    /* 毛玻璃效果定義 (Glassmorphism) */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.4);
    
    /* 視覺規範升級 */
    --radius-fluid: 20px;
    --transition-smooth: 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --shadow-soft: 0 15px 35px rgba(0, 0, 0, 0.03);
}

/* --- 2. 全域字體與背景 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    /* 主要中文/標題使用 Klee One，英數回退至 Inter 確保工整 */
    font-family: 'Klee One', 'Inter', sans-serif;
    color: #333333;
    line-height: 1.8; /* 字體微寬，加大行高更有藝文氣息 */
    background: var(--bg-gradient);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    color: var(--black);
    font-weight: 600; /* Klee One 在 600 分辨率非常有神 */
    letter-spacing: 0.05em; /* 稍微推開字距，增加透氣感 */
}

h1 { font-size: 3.5rem; text-shadow: 2px 2px 10px rgba(0,0,0,0.1); }
h2 { font-size: 2.2rem; margin-bottom: 2.5rem; }
h3 { font-size: 1.6rem; }

/* --- 3. 視覺一致性：進階元件優化 --- */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 9rem 0;
    text-align: center;
}

.bg-light { background-color: rgba(26, 26, 26, 0.02); }

/* 導覽列極致簡約 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--glass-bg);
    padding: 1rem 4rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px); /* 增強毛玻璃 */
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    letter-spacing: 0.1em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 3rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--black);
    transition: var(--transition-smooth);
    position: relative;
    padding-bottom: 4px;
}

/* 懸浮底部滑動線條 */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary);
    transition: var(--transition-smooth);
}

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

/* --- 4. 具體元件優化：手寫感氛圍 --- */

/* Hero 橫幅 */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
                url('https://images.unsplash.com/photo-1499856871958-5b9627545d1a?q=80&w=2000&auto=format&fit=crop') center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding-top: 80px;
}

.hero h1 span {
    color: var(--primary);
    border-bottom: 1px dashed var(--primary); /* 增加一點裝飾質感 */
}

/* 內容卡片 & 毛玻璃效果 */
.content-box, .card, .image-text-box {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-fluid);
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
}

.image-text-box {
    display: flex;
    overflow: hidden;
    text-align: left;
    margin: 3rem 0;
}

.image-text-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.08); /* 加深陰影 */
}

.image-text-box img {
    width: 45%;
    object-fit: cover;
    filter: sepia(20%) contrast(105%); /* 增加膠卷質感 */
}

.image-text-box .text-content { padding: 4rem; width: 55%; }

/* 三欄位網格 */
.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.card {
    padding: 4rem 2rem;
    text-align: left;
    height: 100%;
}

.card:hover {
    background: var(--white);
    transform: translateY(-12px);
    border-color: var(--primary);
}

.card i {
    font-size: 2.2rem;
    color: #444; /* 稍微降低對比，讓黃色點綴更突出 */
    margin-bottom: 1.5rem;
    display: block;
}

/* --- 5. 按鈕風格化 --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 1.2rem 3rem;
    background-color: var(--primary);
    color: var(--black);
    font-weight: 600;
    text-decoration: none;
    border-radius: 60px;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 20px rgba(255, 222, 66, 0.4);
}

.btn:hover {
    transform: scale(1.05) rotate(-1deg); /* 帶一點活潑的傾斜 */
    background-color: var(--black);
    color: var(--primary);
}

/* --- 6. 響應式優化 --- */
@media (max-width: 768px) {
    .navbar { padding: 1rem 2rem; }
    .nav-links { display: none; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }
    .section { padding: 5rem 0; }
    .grid-container { grid-template-columns: 1fr; }
    .image-text-box { flex-direction: column; }
    .image-text-box img, .image-text-box .text-content { width: 100%; }
}

/* --- 7. 動畫 --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.23, 1, 0.32, 1), 
                transform 1.2s cubic-bezier(0.23, 1, 0.32, 1);
}

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

footer {
    background-color: #F0F0F0;
    color: var(--black);
    padding: 5rem 0;
    text-align: center;
    border-top: 1px solid #DDD;
}