/* ============================================
   廖怡婷 Portfolio · 莫蘭迪藍色系
   Yi-Ting Liao Portfolio - Morandi Blue Theme
   ============================================ */

:root {
    /* === 主色：莫蘭迪藍系 === */
    --color-primary: #6b8294;          /* 莫蘭迪主藍 */
    --color-primary-light: #9ab0bf;    /* 淺霧霾藍 */
    --color-primary-dark: #4a6478;     /* 深莫蘭迪藍 */
    --color-primary-deep: #3d5566;     /* 最深藍 */
    
    /* === 強調色 === */
    --color-accent: #7ea3b8;           /* 霧霾藍 */
    --color-accent-soft: #c9dae3;      /* 柔藍 */
    --color-accent-pale: #e3edf2;      /* 蒼藍 */
    
    /* === 中性背景色 === */
    --color-bg: #f5f8fa;               /* 冷白底 */
    --color-bg-alt: #eaf0f4;           /* 灰藍底 */
    --color-bg-card: #ffffff;          /* 純白卡片 */
    
    /* === 文字色 === */
    --color-text: #2c3e4a;             /* 深藍灰主文字 */
    --color-text-light: #5a6b78;       /* 中藍灰副文字 */
    --color-text-muted: #8a9ba8;       /* 淡藍灰 */
    --color-border: #d6dfe6;           /* 灰藍邊框 */
    
    /* === 點綴色 (柔和) === */
    --color-blue-soft: #b8cdd9;        /* 粉藍 */
    --color-teal-soft: #9eb8b4;        /* 莫蘭迪青 */
    --color-grey-blue: #a8b8c4;        /* 灰藍 */
    
    /* === 陰影 === */
    --shadow-sm: 0 2px 8px rgba(74, 100, 120, 0.08);
    --shadow-md: 0 4px 20px rgba(74, 100, 120, 0.12);
    --shadow-lg: 0 10px 40px rgba(74, 100, 120, 0.15);
    
    /* === 字體 === */
    --font-zh: 'Noto Serif TC', serif;
    --font-en: 'Cormorant Garamond', 'Inter', serif;
    --font-sans: 'Inter', 'Noto Serif TC', sans-serif;
    
    /* === 過渡 === */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-zh);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

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

/* ========== Navigation ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(245, 248, 250, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(245, 248, 250, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    flex-direction: column;
    font-weight: 500;
    transition: var(--transition);
}

.nav-logo:hover { transform: translateY(-2px); }

.logo-zh {
    font-size: 1.25rem;
    color: var(--color-primary-dark);
    letter-spacing: 2px;
}

.logo-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 1.5px;
    font-style: italic;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    position: relative;
    font-size: 0.95rem;
    color: var(--color-text-light);
    transition: var(--transition);
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-link:hover { color: var(--color-primary-dark); }
.nav-link:hover::after { width: 100%; }

.lang-toggle {
    width: 44px;
    height: 32px;
    border: 1px solid var(--color-primary-light);
    border-radius: 16px;
    color: var(--color-primary-dark);
    font-family: var(--font-en);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: var(--transition);
}

.lang-toggle:hover {
    background: var(--color-primary);
    color: white;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-primary-dark);
    transition: var(--transition);
}

/* ========== Hero Section ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 60px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-bg-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.45;
    filter: blur(60px);
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: var(--color-accent-soft);
    top: -100px;
    right: -50px;
}

.circle-2 {
    width: 350px;
    height: 350px;
    background: var(--color-teal-soft);
    bottom: -50px;
    left: -50px;
    opacity: 0.35;
}

.circle-3 {
    width: 250px;
    height: 250px;
    background: var(--color-blue-soft);
    top: 40%;
    right: 30%;
    opacity: 0.3;
}

.hero-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 80px;
    align-items: center;
    z-index: 1;
}

.hero-image {
    display: flex;
    justify-content: center;
}

.image-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 6px solid white;
    transition: var(--transition);
}

.image-wrapper::before {
    content: '';
    position: absolute;
    inset: -20px;
    border: 2px dashed var(--color-primary-light);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
    z-index: -1;
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

.image-wrapper:hover { transform: scale(1.03); }

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    animation: fadeInRight 0.8s ease;
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

.hero-greeting {
    font-family: var(--font-en);
    font-size: 1.25rem;
    color: var(--color-primary);
    font-style: italic;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.hero-name {
    display: flex;
    flex-direction: column;
    margin-bottom: 16px;
    line-height: 1.1;
}

.name-zh {
    font-size: 3.5rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 4px;
}

.name-en {
    font-family: var(--font-en);
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 400;
    letter-spacing: 2px;
    font-style: italic;
    margin-top: 8px;
}

.hero-title {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    letter-spacing: 1.5px;
}

.hero-description {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 24px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.tag {
    padding: 6px 14px;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--color-primary-dark);
    transition: var(--transition);
}

.tag:hover {
    background: var(--color-accent-soft);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

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

.btn {
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
    transition: var(--transition);
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary-dark);
    border: 1.5px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator a {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.scroll-indicator span {
    display: block;
    width: 12px;
    height: 12px;
    border-bottom: 2px solid var(--color-primary);
    border-right: 2px solid var(--color-primary);
    transform: rotate(45deg);
    margin: -4px;
    animation: scrollDown 2s infinite;
    opacity: 0.6;
}

.scroll-indicator span:nth-child(2) { animation-delay: 0.2s; }
.scroll-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes scrollDown {
    0% { opacity: 0; transform: rotate(45deg) translate(-8px, -8px); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: rotate(45deg) translate(8px, 8px); }
}

/* ========== Section General ========== */
.section {
    padding: 100px 0;
    position: relative;
}

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

.section-subtitle {
    font-family: var(--font-en);
    font-size: 1rem;
    color: var(--color-primary);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 12px;
    font-style: italic;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.section-divider {
    width: 60px;
    height: 2px;
    background: var(--color-primary);
    margin: 0 auto;
    position: relative;
}

.section-divider::before,
.section-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

.section-divider::before { left: -20px; }
.section-divider::after { right: -20px; }

/* ========== About Section ========== */
.about-section {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.about-card {
    background: white;
    padding: 36px 28px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.about-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
}

.about-card:hover .card-icon {
    transform: rotate(10deg) scale(1.1);
}

.about-card h3 {
    font-size: 1.15rem;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    letter-spacing: 1.5px;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========== Education / Timeline ========== */
.education-section {
    background: var(--color-bg-alt);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-primary-light), transparent);
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: 40px;
}

.timeline-dot {
    position: absolute;
    left: 22px;
    top: 28px;
    width: 18px;
    height: 18px;
    background: white;
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    z-index: 1;
}

.timeline-dot::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px solid var(--color-primary-light);
    border-radius: 50%;
    opacity: 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.6; transform: scale(0.8); }
    100% { opacity: 0; transform: scale(1.4); }
}

.timeline-date {
    font-family: var(--font-en);
    font-size: 0.9rem;
    color: var(--color-primary);
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-style: italic;
}

.timeline-card {
    background: white;
    padding: 28px 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--color-primary);
    position: relative;
}

.timeline-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.timeline-icon {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--color-primary);
    font-size: 1.25rem;
}

.timeline-card h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.timeline-subtitle {
    font-size: 0.95rem;
    color: var(--color-primary);
    margin-bottom: 12px;
    font-weight: 500;
}

.timeline-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========== Experience Section ========== */
.experience-section {
    background: var(--color-bg);
}

.experience-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: var(--color-primary-light);
    opacity: 0.4;
}

.exp-item {
    position: relative;
    padding-left: 50px;
    margin-bottom: 32px;
}

.exp-marker {
    position: absolute;
    left: 4px;
    top: 28px;
    width: 18px;
    height: 18px;
    background: white;
    border: 2.5px solid var(--color-primary);
    border-radius: 50%;
    transition: var(--transition);
}

.exp-item:hover .exp-marker {
    background: var(--color-primary);
    transform: scale(1.2);
}

.exp-item.highlight .exp-marker {
    background: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(126, 163, 184, 0.25);
}

.exp-card {
    background: white;
    padding: 24px 28px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.exp-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.exp-item.highlight .exp-card {
    border-left: 4px solid var(--color-accent);
    background: linear-gradient(to right, var(--color-accent-pale), white);
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
    gap: 16px;
    flex-wrap: wrap;
}

.exp-card h3 {
    font-size: 1.1rem;
    color: var(--color-text);
    letter-spacing: 0.5px;
    line-height: 1.5;
    flex: 1;
}

.exp-date {
    font-family: var(--font-en);
    font-size: 0.85rem;
    color: var(--color-primary);
    font-style: italic;
    white-space: nowrap;
    padding: 4px 12px;
    background: var(--color-bg-alt);
    border-radius: 12px;
}

.exp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag-sm {
    padding: 4px 10px;
    background: var(--color-bg-alt);
    color: var(--color-primary-dark);
    border-radius: 12px;
    font-size: 0.78rem;
    transition: var(--transition);
}

.tag-sm:hover {
    background: var(--color-accent-soft);
    color: var(--color-primary-dark);
}

/* ========== Awards Section ========== */
.awards-section {
    background: var(--color-bg-alt);
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.award-column {
    background: white;
    padding: 36px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.award-column-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    color: var(--color-primary-dark);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
    letter-spacing: 1.5px;
}

.award-column-title i {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.award-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.award-item {
    display: flex;
    gap: 20px;
    padding: 16px;
    border-radius: 10px;
    background: var(--color-bg);
    transition: var(--transition);
    border-left: 3px solid var(--color-primary-light);
}

.award-item:hover {
    background: var(--color-bg-alt);
    transform: translateX(4px);
}

.award-item.featured {
    background: linear-gradient(to right, var(--color-accent-pale), var(--color-bg));
    border-left-color: var(--color-accent);
}

.award-year {
    font-family: var(--font-en);
    font-size: 0.85rem;
    color: var(--color-primary);
    font-style: italic;
    min-width: 80px;
    padding-top: 2px;
}

.award-content h4 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.award-result {
    font-size: 0.88rem;
    color: var(--color-text-light);
}

.award-item.featured .award-result {
    color: var(--color-primary-dark);
    font-weight: 500;
}

/* ========== Skills Section ========== */
.skills-section {
    background: var(--color-bg);
}

.skills-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.certs-box,
.skills-box {
    background: white;
    padding: 36px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.box-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    color: var(--color-primary-dark);
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
    letter-spacing: 1.5px;
}

.box-title i {
    color: var(--color-accent);
    font-size: 1.35rem;
}

.cert-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cert-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--color-bg);
    border-radius: 12px;
    transition: var(--transition);
}

.cert-card:hover {
    background: var(--color-bg-alt);
    transform: translateX(4px);
}

.cert-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.cert-info h4 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 2px;
    letter-spacing: 0.5px;
}

.cert-info p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* === 相關經驗領域 === */
.experience-areas {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.exp-area {
    padding: 14px 18px;
    background: var(--color-bg);
    border-radius: 10px;
    border-left: 3px solid var(--color-primary-light);
    transition: var(--transition);
}

.exp-area:hover {
    background: var(--color-bg-alt);
    border-left-color: var(--color-primary);
    transform: translateX(4px);
}

.exp-area h4 {
    font-size: 0.98rem;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.exp-area p {
    font-size: 0.86rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin: 0;
}

/* ========== Contact Section ========== */
.contact-section {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.contact-intro {
    max-width: 600px;
    margin: 20px auto 0;
    color: var(--color-text-light);
    font-size: 1rem;
    line-height: 1.8;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: white;
    padding: 36px 24px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    display: block;
}

.contact-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.contact-card h4 {
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.contact-card p {
    font-size: 0.92rem;
    color: var(--color-text-light);
}

/* ========== Footer ========== */
.footer {
    background: var(--color-primary-dark);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer-name {
    font-size: 1.1rem;
    margin-bottom: 8px;
    letter-spacing: 2px;
    color: var(--color-accent-soft);
}

.footer-text {
    font-family: var(--font-en);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.5px;
}

.heart {
    color: var(--color-blue-soft);
    animation: heartbeat 1.5s ease infinite;
    display: inline-block;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ========== Animations on scroll ========== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-image { order: -1; }
    
    .image-wrapper {
        width: 240px;
        height: 240px;
    }
    
    .hero-name { align-items: center; }
    
    .name-zh { font-size: 2.75rem; }
    
    .hero-tags { justify-content: center; }
    
    .hero-buttons { justify-content: center; }
    
    .skills-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(245, 248, 250, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        transform: translateY(-150%);
        transition: var(--transition);
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--color-border);
    }
    
    .nav-menu.active { transform: translateY(0); }
    
    .hamburger { display: flex; }
    
    .hamburger.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .hamburger.active span:nth-child(2) { opacity: 0; }
    
    .hamburger.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    
    .section { padding: 70px 0; }
    
    .section-title { font-size: 1.75rem; }
    
    .name-zh {
        font-size: 2.25rem;
        letter-spacing: 2px;
    }
    
    .name-en { font-size: 1.2rem; }
    
    .hero-description { font-size: 0.95rem; }
    
    .timeline-item { padding-left: 60px; }
    
    .timeline::before { left: 20px; }
    
    .timeline-dot { left: 12px; }
    
    .exp-header {
        flex-direction: column;
        gap: 8px;
    }
    
    .award-item {
        flex-direction: column;
        gap: 8px;
    }
    
    .award-year { min-width: auto; }
    
    .container { padding: 0 16px; }
}

@media (max-width: 480px) {
    .name-zh { font-size: 2rem; }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .about-grid { grid-template-columns: 1fr; }
}