/* ==========================================================================
   leoprocess 個人介紹網站 - 核心樣式表
   設計風格：深色科技、霓虹漸層、玻璃擬態 (Glassmorphism)、流暢微動畫
   ========================================================================== */

/* 重設與全域變數 */
:root {
    /* 核心調色盤 (HSL 系統) */
    --bg-main: #070913;          /* 極緻暗藍底色 */
    --bg-card: rgba(17, 22, 43, 0.65); /* 半透明玻璃卡片背景 */
    --bg-nav: rgba(7, 9, 19, 0.75);
    
    --accent-purple: hsl(263, 90%, 62%); /* 炫光紫 */
    --accent-cyan: hsl(187, 95%, 48%);   /* 電光青綠 */
    --accent-glow: rgba(139, 92, 246, 0.15);
    
    --text-main: #f3f4f6;        /* 近純白 */
    --text-muted: #9ca3af;       /* 灰字 */
    --text-dark: #6b7280;
    
    --border-glass: rgba(255, 255, 255, 0.07);
    --border-glass-hover: rgba(255, 255, 255, 0.15);
    
    --shadow-premium: 0 15px 35px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.25);
    
    /* 字型與轉場 */
    --font-heading: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 網頁滾動條樣式 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-purple);
}

/* ==========================================================================
   動態背景光暈 (Glow Background)
   ========================================================================== */
.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(160px);
    opacity: 0.15;
    pointer-events: none;
    z-index: -1;
    animation: drift 25s infinite alternate ease-in-out;
}

.bg-glow-1 {
    background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
    top: -100px;
    right: -100px;
}

.bg-glow-2 {
    background: radial-gradient(circle, var(--accent-cyan) 0%, transparent 70%);
    top: 50%;
    left: -200px;
    animation-delay: -5s;
}

@keyframes drift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(80px, 50px) scale(1.2);
    }
}

/* ==========================================================================
   共用元件與工具樣式 (Buttons, Badges)
   ========================================================================== */
.text-gradient {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    color: var(--accent-cyan);
    font-weight: 600;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn i {
    width: 18px;
    height: 18px;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    color: #fff;
    border: none;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-glass-hover);
    transform: translateY(-3px);
}

.btn-block {
    display: flex;
    justify-content: center;
    width: 100%;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    font-weight: 600;
    display: inline-block;
    margin-bottom: 8px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.title-underline {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    margin: 0 auto;
    border-radius: 2px;
}

/* ==========================================================================
   導覽列 (Navbar)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(7, 9, 19, 0.9);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

.navbar.scrolled .nav-container {
    padding: 10px 24px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--accent-cyan);
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transition: var(--transition-smooth);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================================================
   首頁視覺區 (Hero Section)
   ========================================================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
    width: 100%;
}

.badge-container {
    margin-bottom: 20px;
}

.promo-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.2);
    padding: 6px 16px;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: hsl(263, 100%, 75%);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 10px var(--accent-cyan);
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.9);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.2);
        opacity: 1;
        box-shadow: 0 0 15px var(--accent-cyan);
    }
    100% {
        transform: scale(0.9);
        opacity: 0.6;
    }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    line-height: 1.15;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-glow-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    padding: 6px;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    box-shadow: var(--shadow-glow);
    animation: float 6s infinite ease-in-out;
}

.avatar-glow-wrapper::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    filter: blur(15px);
    opacity: 0.4;
    z-index: -1;
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--bg-main);
    background-color: var(--bg-card);
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-12px);
    }
    100% {
        transform: translateY(0px);
    }
}

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    animation: bounce 2s infinite;
}

.mouse-icon {
    width: 28px;
    height: 45px;
    border: 2px solid var(--text-muted);
    border-radius: 15px;
    display: block;
    position: relative;
}

.mouse-wheel {
    width: 4px;
    height: 8px;
    background-color: var(--accent-cyan);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 1.5s infinite;
}

@keyframes scroll-wheel {
    0% {
        opacity: 1;
        top: 8px;
    }
    100% {
        opacity: 0;
        top: 22px;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translate(-50%, 0);
    }
    40% {
        transform: translate(-50%, -8px);
    }
    60% {
        transform: translate(-50%, -4px);
    }
}

/* ==========================================================================
   關於我 (About Section)
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-main);
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 35px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 20px 10px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.stat-card:hover {
    border-color: var(--border-glass-hover);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-item {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.feature-item:hover {
    border-color: rgba(139, 92, 246, 0.3);
    transform: translateX(5px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.05);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--accent-cyan);
    flex-shrink: 0;
}

.feature-icon i {
    width: 24px;
    height: 24px;
}

.feature-info h4 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-info p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ==========================================================================
   核心專長 (Services Section)
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 24px;
    padding: 40px 30px;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glass-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 20px var(--accent-glow);
}

.service-card:hover::after {
    transform: scaleX(1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--accent-cyan);
    margin-bottom: 28px;
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 5px 15px rgba(6, 182, 212, 0.3);
}

.service-icon i {
    width: 28px;
    height: 28px;
}

.service-card h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 28px;
    line-height: 1.6;
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-list li {
    font-size: 0.9rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.service-list li i {
    width: 16px;
    height: 16px;
    color: var(--accent-cyan);
}

/* ==========================================================================
   精選作品 (Portfolio Section)
   ========================================================================== */
.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
    font-family: var(--font-heading);
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.filter-btn:hover {
    border-color: var(--border-glass-hover);
    color: var(--text-main);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.portfolio-item {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    cursor: pointer;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    border-color: var(--border-glass-hover);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.portfolio-image-wrapper {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.portfolio-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-item:hover .portfolio-image-wrapper img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(7, 9, 19, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition-smooth);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.zoom-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    transform: scale(0.8);
    transition: var(--transition-smooth);
}

.portfolio-item:hover .zoom-icon {
    transform: scale(1);
}

.zoom-icon i {
    width: 22px;
    height: 22px;
}

.portfolio-info {
    padding: 24px;
}

.item-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-cyan);
    font-weight: 600;
    display: block;
    margin-bottom: 8px;
}

.portfolio-info h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.portfolio-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ==========================================================================
   作品詳情彈窗 (Modal)
   ========================================================================== */
.portfolio-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.portfolio-modal.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 7, 16, 0.85);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: #0d1225;
    border: 1px solid var(--border-glass-hover);
    border-radius: 28px;
    max-width: 900px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    z-index: 10;
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-modal.open .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 15;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--accent-cyan);
}

.modal-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
}

.modal-image-container {
    height: 100%;
    min-height: 350px;
    background: #070913;
}

.modal-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.modal-details {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-category {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 12px;
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.modal-desc {
    color: var(--text-muted);
    font-size: 0.98rem;
    margin-bottom: 24px;
    line-height: 1.7;
}

.modal-features h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

#modal-tech-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

#modal-tech-list li {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: hsl(263, 100%, 75%);
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 50px;
    font-weight: 500;
}

/* ==========================================================================
   聯絡我 (Contact Section)
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 40px;
    font-size: 1.05rem;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-bottom: 40px;
}

.contact-detail-item {
    display: flex;
    gap: 20px;
    align-items: center;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--accent-cyan);
}

.contact-icon i {
    width: 20px;
    height: 20px;
}

.contact-detail-text span {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}

.contact-detail-text a, .contact-detail-text p {
    font-size: 1.05rem;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 0;
}

.contact-detail-text a:hover {
    color: var(--accent-cyan);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.social-links a:hover {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    color: #fff;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
}

.social-links a i {
    width: 18px;
    height: 18px;
}

/* 聯絡表單 */
.contact-form-container {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 28px;
    padding: 40px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.contact-form {
    transition: opacity 0.4s ease;
}

.contact-form.hidden {
    opacity: 0;
    pointer-events: none;
    position: absolute;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
}

.form-group input, .form-group textarea {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 14px 18px;
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-purple);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.15);
}

.form-success-message {
    text-align: center;
    padding: 40px 0;
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.form-success-message.show {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 1;
    transform: translateY(0);
}

.success-icon {
    width: 70px;
    height: 70px;
    color: var(--accent-cyan);
    margin-bottom: 20px;
}

.success-icon i {
    width: 100%;
    height: 100%;
}

.form-success-message h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.form-success-message p {
    color: var(--text-muted);
    margin-bottom: 30px;
    max-width: 320px;
}

/* ==========================================================================
   頁尾 (Footer)
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border-glass);
    background: #04060d;
    padding: 40px 24px;
    text-align: center;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-container p {
    font-family: var(--font-heading);
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-subtext {
    font-size: 0.8rem !important;
    color: var(--text-dark) !important;
    margin-top: 8px;
}

/* ==========================================================================
   技術實力 (Skills Section)
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.skills-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 24px;
    padding: 40px 30px;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.skills-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.skills-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glass-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 20px var(--accent-glow);
}

.skills-card:hover::after {
    transform: scaleX(1);
}

.skills-category-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--accent-cyan);
    margin-bottom: 28px;
    transition: var(--transition-smooth);
}

.skills-card:hover .skills-category-icon {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 5px 15px rgba(6, 182, 212, 0.3);
}

.skills-category-icon i {
    width: 28px;
    height: 28px;
}

.skills-card h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 12px;
}

.skills-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skills-list li {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.skill-name {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-main);
    font-weight: 600;
}

.skill-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ==========================================================================
   響應式設計 (RWD 媒體查詢)
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .services-grid, .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(7, 9, 19, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 30px 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-glass);
        transform: translateY(-150%);
        transition: var(--transition-smooth);
        z-index: 999;
    }
    
    .nav-links.open {
        transform: translateY(0);
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-visual {
        order: 1;
    }
    
    .hero-subtitle {
        margin: 0 auto 30px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .avatar-glow-wrapper {
        width: 250px;
        height: 250px;
    }
    
    .services-grid, .portfolio-grid, .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-image-container {
        min-height: 250px;
        height: 250px;
    }
    
    .modal-details {
        padding: 30px 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .stats-container {
        grid-template-columns: 1fr;
    }
    .contact-form-container {
        padding: 24px;
    }
}