/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 色彩方案 - 领英商务蓝色风格 */
    --primary-gradient: linear-gradient(135deg, #0077B5 0%, #004182 100%);
    --secondary-gradient: linear-gradient(135deg, #0A66C2 0%, #004182 100%);
    --accent-gradient: linear-gradient(135deg, #0077B5 0%, #00A0DC 100%);
    --dark-gradient: linear-gradient(135deg, #004182 0%, #002855 100%);
    
    --primary-color: #0077B5;
    --secondary-color: #0A66C2;
    --accent-color: #00A0DC;
    --text-dark: #2d3748;
    --text-light: #718096;
    --white: #ffffff;
    --bg-light: #f7fafc;
    --bg-dark: #1a202c;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
    
    /* 边框半径 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* 过渡 */
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: 60px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    background: transparent;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    transition: var(--transition);
}

.navbar.scrolled .nav-brand h2 {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.navbar.scrolled .nav-link {
    color: var(--text-dark);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--white);
    transition: var(--transition);
}

.navbar.scrolled .nav-link::after {
    background: var(--primary-gradient);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition);
}

.navbar.scrolled .nav-toggle span {
    background: var(--primary-color);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    position: relative;
    background: linear-gradient(135deg, #0077B5 0%, #0A66C2 50%, #004182 100%);
    overflow: hidden;
    padding-top: 80px;
    padding-bottom: 0;
}

.hero-content {
    text-align: left;
    z-index: 10;
    color: var(--white);
    padding: 40px;
    max-width: 50%;
    align-self: center;
}

.hero-image {
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: 1;
    max-width: 50%;
    height: auto;
    opacity: 0.95;
    animation: fadeInRight 1s ease;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.highlight {
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 10px;
    left: 0;
    width: 100%;
    height: 15px;
    background: rgba(255, 255, 255, 0.3);
    z-index: -1;
}

.typing-container {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    min-height: 60px;
}

.typing-text {
    color: rgba(255, 255, 255, 0.9);
}

.cursor {
    animation: blink 0.7s infinite;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 40px;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.3s backwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    backdrop-filter: blur(10px);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

/* Hero 动画形状 */
.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 10%;
    animation-delay: 5s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    bottom: 10%;
    left: 50%;
    animation-delay: 10s;
}

/* ===== 关于我 ===== */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    box-shadow: var(--shadow-xl);
}

.image-placeholder i {
    font-size: 5rem;
    margin-bottom: 20px;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-text strong {
    color: var(--primary-color);
    font-weight: 600;
}

.social-links {
    display: flex;
    gap: 20px;
    margin: 30px 0;
}

.social-link {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.social-link.youtube {
    background: linear-gradient(135deg, #FF0000 0%, #CC0000 100%);
}

.social-link.linkedin {
    background: linear-gradient(135deg, #0077B5 0%, #005582 100%);
}

.social-link:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-item h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-item p {
    color: var(--text-light);
    font-size: 1rem;
}

/* ===== 作品集 ===== */
.portfolio {
    background: var(--bg-light);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.portfolio-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.card-image .image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 4rem;
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(102, 126, 234, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.overlay-link {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--white);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    transition: var(--transition);
}

.overlay-link:hover {
    transform: scale(1.2);
}

.card-content {
    padding: 30px;
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.card-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 博客 ===== */
.blog {
    background: var(--white);
}

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

.blog-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
    transform: translateX(-50%);
}

.blog-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
    align-items: center;
    position: relative;
}

.blog-card::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    box-shadow: 0 0 0 4px var(--white), 0 0 0 6px var(--primary-color);
}

.blog-card:nth-child(even) {
    direction: rtl;
}

.blog-card:nth-child(even) > * {
    direction: ltr;
}

.blog-date {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    text-align: right;
}

.blog-card:nth-child(even) .blog-date {
    text-align: left;
}

.blog-content {
    background: var(--bg-light);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.blog-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.blog-content h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.blog-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.read-more:hover {
    gap: 15px;
}

/* ===== 联系我 ===== */
.contact {
    background: var(--bg-light);
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.contact-card {
    background: var(--white);
    padding: 50px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.contact-card:hover::before {
    transform: scaleX(1);
}

.contact-card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
    position: relative;
    transition: all 0.4s ease;
}

.contact-card:hover .contact-card-icon {
    transform: scale(1.1) rotate(5deg);
}

.email-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.youtube-icon {
    background: linear-gradient(135deg, #FF0000 0%, #CC0000 100%);
    box-shadow: 0 10px 30px rgba(255, 0, 0, 0.3);
}

.linkedin-icon {
    background: linear-gradient(135deg, #0077B5 0%, #005885 100%);
    box-shadow: 0 10px 30px rgba(0, 119, 181, 0.3);
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.contact-card-info {
    color: var(--text-light);
    margin-bottom: 25px;
    font-size: 1rem;
    line-height: 1.6;
    word-break: break-word;
}

.email-icon + h3 + .contact-card-info {
    color: var(--primary-color);
    font-weight: 600;
    font-family: 'Monaco', 'Courier New', monospace;
}

.contact-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    background: var(--bg-light);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-card-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: left 0.4s ease;
    z-index: 0;
}

.contact-card-btn:hover::before {
    left: 0;
}

.contact-card-btn:hover {
    color: var(--white);
    transform: scale(1.05);
}

.contact-card-btn i,
.contact-card-btn span {
    position: relative;
    z-index: 1;
}

.contact-card-btn i {
    transition: transform 0.3s ease;
}

.contact-card-btn:hover i {
    transform: translateX(5px);
}

.contact-cta {
    margin-top: 80px;
    padding: 60px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h3 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.cta-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}


/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: var(--white);
    padding: 60px 0 30px;
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-about p {
    opacity: 0.8;
    margin-bottom: 10px;
}

.footer-about .motto {
    font-style: italic;
    margin-top: 15px;
    opacity: 0.9;
}

.footer-links h4,
.footer-social h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-social .social-links {
    margin-top: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    opacity: 0.7;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-50px) rotate(90deg);
    }
    50% {
        transform: translateY(0) rotate(180deg);
    }
    75% {
        transform: translateY(50px) rotate(270deg);
    }
}

/* AOS 动画效果 */
[data-aos] {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-up"] {
    transform: translateY(50px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-right"] {
    transform: translateX(-50px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(50px);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

[data-aos="zoom-in"] {
    transform: scale(0.8);
}

/* ===== 响应式设计 ===== */

/* 平板 */
@media (max-width: 992px) {
    .section-title {
        font-size: 2.5rem;
    }
    
    .hero {
        padding: 80px 20px 0;
    }
    
    .hero-content {
        max-width: 60%;
        padding: 20px;
    }
    
    .hero-image {
        max-width: 60%;
        right: -10%;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .typing-container {
        font-size: 1.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .blog-timeline::before {
        left: 30px;
    }
    
    .blog-card {
        grid-template-columns: 1fr;
        padding-left: 80px;
    }
    
    .blog-card::before {
        left: 30px;
    }
    
    .blog-card:nth-child(even) {
        direction: ltr;
    }
    
    .blog-date {
        text-align: left !important;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-cta {
        padding: 40px 30px;
    }
}

/* 手机 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 40px 0;
        gap: 30px;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero {
        padding-top: 100px;
        min-height: 90vh;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .hero-content {
        max-width: 100%;
        text-align: center;
        padding: 20px;
        margin-bottom: 20px;
    }
    
    .hero-image {
        position: relative;
        max-width: 100%;
        margin: 0 auto;
        right: auto;
        bottom: auto;
        opacity: 1;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .typing-container {
        font-size: 1.2rem;
        min-height: 40px;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        padding: 0 20px;
    }
    
    .btn {
        justify-content: center;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .blog-card {
        padding-left: 60px;
    }
    
    .blog-timeline::before {
        left: 20px;
    }
    
    .blog-card::before {
        left: 20px;
    }
    
    .contact-card {
        padding: 40px 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .hero {
        padding: 80px 10px 0;
    }
    
    .hero-content {
        padding: 15px;
    }
    
    .hero-image {
        max-width: 100%;
        padding: 0 10px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .about-text h3 {
        font-size: 1.5rem;
    }
    
    .social-link {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}