/* ===== Tech Style — Personal Homepage (Light Theme) ===== */
/* 颜色方案: 深蓝 #003D78 | 浅蓝 #0066B1 | 红色 #E22718 | 深灰 #6F6F6F | 浅灰 #D6D6D6 */

/* ==================== CSS Variables ==================== */
:root {
    --color-deep-blue: #003D78;
    --color-light-blue: #0066B1;
    --color-red: #E22718;
    --color-dark-gray: #6F6F6F;
    --color-light-gray: #D6D6D6;

    /* 背景色系列 — 浅色主题 */
    --bg-page: #ffffff;
    --bg-section-alt: #f0f5fa;
    --bg-card: #ffffff;
    --bg-hero: #003D78;

    /* 文字色系列 — 深色 */
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --text-muted: #8a8a9a;
    --text-bright: #ffffff;

    /* 字体 */
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

    /* 过渡时间 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;

    /* 最大宽度 */
    --max-width: 1200px;

    /* 导航栏高度 */
    --nav-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

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

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

::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-page);
}
::-webkit-scrollbar-thumb {
    background: var(--color-light-blue);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-deep-blue);
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.btn-primary {
    background: var(--color-light-blue);
    color: var(--text-bright);
}

.btn-primary:hover {
    background: var(--color-deep-blue);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 102, 177, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--text-bright);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
    border-color: var(--text-bright);
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ==================== Navbar ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(0, 61, 120, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.nav-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo .logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-link {
    font-size: 15px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-light-blue);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--text-bright);
}

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

.nav-link.active {
    color: var(--color-light-blue);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端下拉菜单 */
.mobile-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(0, 61, 120, 0.96);
    backdrop-filter: blur(12px);
    padding: 16px 0;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.mobile-link {
    padding: 14px 24px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-link:hover {
    color: var(--color-light-blue);
    background: rgba(0, 102, 177, 0.15);
}

/* ==================== Hero ==================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-hero);
}

/* 科技网格背景 — 纯色版 */
.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* 浮动光点 */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--color-light-blue);
    border-radius: 50%;
    opacity: 0.5;
    animation: particleFloat linear infinite;
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
    }
    10% { opacity: 0.5; }
    90% { opacity: 0.5; }
    100% {
        transform: translateY(-100px) translateX(var(--drift, 0px));
        opacity: 0;
    }
}

/* 遮罩 — 纯色替代渐变 */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 61, 120, 0.25);
}

/* Hero 内容 */
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
}

.hero-greeting {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
    font-weight: 400;
}

.hero-name {
    font-size: clamp(40px, 8vw, 80px);
    font-weight: 800;
    color: var(--text-bright);
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.hero-title {
    font-size: clamp(20px, 4vw, 36px);
    font-weight: 500;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.title-accent {
    color: rgba(255, 255, 255, 0.95);
}

.title-divider {
    color: rgba(255, 255, 255, 0.5);
    font-weight: 300;
}

.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Hero 入场动画 */
.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    transform: translateY(30px);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 向下滚动提示 */
.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 2;
}

.scroll-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    display: block;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    margin: 0 auto;
    border-right: 2px solid var(--color-light-blue);
    border-bottom: 2px solid var(--color-light-blue);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); }
    50% { transform: rotate(45deg) translate(4px, 4px); }
}

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

/* 交替背景色 — 浅蓝灰 */
.section-alt {
    background: var(--bg-section-alt);
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* 区域标题 */
.section-header {
    margin-bottom: 60px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.section-tag {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-red);
    font-family: var(--font-sans);
}

.section-title {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 700;
    color: var(--color-deep-blue);
}

/* 区域分割线 — 纯色替代渐变 */
.section-line {
    flex: 1;
    height: 1px;
    background: var(--color-light-gray);
}

/* ==================== About ==================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-intro {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.highlight {
    color: var(--color-light-blue);
    font-weight: 600;
}

.about-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.skills-title {
    font-size: 18px;
    color: var(--color-deep-blue);
    margin-bottom: 24px;
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tag {
    padding: 8px 18px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: default;
}

.tag-sm {
    background: rgba(0, 102, 177, 0.08);
    color: var(--text-secondary);
    border: 1px solid rgba(0, 102, 177, 0.15);
}

.tag-md {
    background: rgba(0, 102, 177, 0.15);
    color: var(--color-light-blue);
    border: 1px solid rgba(0, 102, 177, 0.25);
}

.tag-lg {
    background: rgba(0, 61, 120, 0.12);
    color: var(--color-deep-blue);
    border: 1px solid rgba(0, 61, 120, 0.2);
}

.skill-tag:hover {
    transform: translateY(-3px);
    border-color: var(--color-light-blue);
    box-shadow: 0 4px 12px rgba(0, 102, 177, 0.12);
}

/* ==================== Timeline ==================== */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-light-gray);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-node {
    position: absolute;
    left: -34px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-light-blue);
    border: 3px solid var(--bg-page);
    z-index: 1;
}

.timeline-node.node-active {
    background: var(--color-red);
    box-shadow: 0 0 0 4px rgba(226, 39, 24, 0.15);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--color-light-gray);
    border-radius: 12px;
    padding: 24px;
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    border-color: var(--color-light-blue);
    box-shadow: 0 4px 20px rgba(0, 102, 177, 0.1);
}

.timeline-date {
    font-size: 14px;
    color: var(--color-light-blue);
    font-weight: 500;
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.timeline-summary {
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

/* 展开详情按钮 */
.timeline-toggle {
    background: none;
    border: 1px solid var(--color-light-gray);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.timeline-toggle:hover {
    border-color: var(--color-light-blue);
    color: var(--color-light-blue);
}

.timeline-toggle[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

.toggle-icon {
    transition: transform var(--transition-normal);
}

/* 详情区域 */
.timeline-detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), margin-top var(--transition-slow);
}

.timeline-detail.open {
    max-height: 500px;
    margin-top: 16px;
}

.detail-list {
    list-style: none;
    padding-left: 0;
}

.detail-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
}

.detail-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-light-blue);
}

/* ==================== Portfolio ==================== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-card {
    background: var(--bg-card);
    border: 1px solid var(--color-light-gray);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.portfolio-card:hover {
    border-color: var(--color-light-blue);
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 102, 177, 0.12);
}

/* 卡片封面 — 纯色替代渐变 */
.card-cover {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--color-deep-blue);
}

.card-cover-alt {
    background: var(--color-light-blue);
}

.card-icon {
    font-size: 48px;
    color: rgba(255, 255, 255, 0.9);
    transition: transform var(--transition-normal);
}

.portfolio-card:hover .card-icon {
    transform: scale(1.15);
}

.card-body {
    padding: 24px;
}

.card-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 102, 177, 0.1);
    color: var(--color-light-blue);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 12px;
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 作品详情弹窗 */
.card-detail {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card-detail.active {
    display: flex;
    opacity: 1;
}

.detail-content {
    background: var(--bg-card);
    border: 1px solid var(--color-light-blue);
    border-radius: 16px;
    padding: 40px;
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.card-detail.active .detail-content {
    transform: scale(1);
}

.detail-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.detail-close:hover {
    background: rgba(226, 39, 24, 0.1);
    color: var(--color-red);
}

.detail-content h3 {
    font-size: 24px;
    color: var(--color-deep-blue);
    margin-bottom: 16px;
}

.detail-content p {
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.detail-content h4 {
    font-size: 16px;
    color: var(--color-light-blue);
    margin-bottom: 12px;
    margin-top: 20px;
}

.detail-content ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 16px;
}

.detail-content ul li {
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-primary);
    position: relative;
}

.detail-content ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-light-blue);
}

/* ==================== Blog ==================== */
.blog-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.blog-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 32px;
    background: var(--bg-card);
    border: 1px solid var(--color-light-gray);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.blog-item:hover {
    border-color: var(--color-light-blue);
    box-shadow: 0 4px 24px rgba(0, 102, 177, 0.08);
}

/* 文章封面 — 纯色 */
.blog-cover {
    height: 100%;
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-deep-blue);
}

.blog-cover-alt {
    background: var(--color-light-blue);
}

.blog-cover-icon {
    font-size: 40px;
    color: rgba(255, 255, 255, 0.85);
}

.blog-info {
    padding: 24px 24px 24px 0;
}

.blog-date {
    font-size: 14px;
    color: var(--color-light-blue);
    font-weight: 500;
    margin-bottom: 8px;
}

.blog-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    transition: color var(--transition-fast);
}

.blog-item:hover .blog-title {
    color: var(--color-red);
}

.blog-summary {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.blog-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.blog-tag {
    padding: 4px 12px;
    background: rgba(0, 61, 120, 0.08);
    border: 1px solid rgba(0, 61, 120, 0.15);
    color: var(--color-light-blue);
    border-radius: 4px;
    font-size: 12px;
}

/* ==================== Contact ==================== */
.contact-content {
    text-align: center;
    padding: 40px 0;
}

.contact-intro {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 40px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100px;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--color-light-gray);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.social-link:hover {
    border-color: var(--color-light-blue);
    transform: translateY(-6px);
    box-shadow: 0 8px 24px rgba(0, 102, 177, 0.1);
}

.social-link i {
    font-size: 28px;
    color: var(--color-light-blue);
}

.social-link span {
    font-size: 14px;
    color: var(--text-primary);
}

/* ==================== Footer ==================== */
.footer {
    border-top: 1px solid var(--color-light-gray);
    padding: 40px 0;
    text-align: center;
    background: var(--bg-section-alt);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.footer-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.footer-subtext {
    font-size: 12px;
    color: var(--color-dark-gray);
}

/* ==================== Back to Top ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-deep-blue);
    border: 2px solid var(--color-light-blue);
    border-radius: 50%;
    color: var(--text-bright);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

/* ==================== Scroll Reveal ==================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== Responsive ==================== */
@media (max-width: 968px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .blog-item {
        grid-template-columns: 160px 1fr;
        gap: 20px;
    }

    .blog-info {
        padding: 20px 20px 20px 0;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    .hero-greeting {
        font-size: 16px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .section {
        padding: 60px 0;
    }

    .section-container {
        padding: 0 16px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .timeline {
        padding-left: 0;
    }

    .timeline::before {
        display: none;
    }

    .timeline-item {
        padding-left: 0;
    }

    .timeline-node {
        display: none;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .blog-item {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .blog-cover {
        min-height: 120px;
    }

    .blog-info {
        padding: 20px;
    }

    .social-links {
        gap: 16px;
    }

    .social-link {
        width: calc(50% - 8px);
        padding: 20px 12px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }

    .detail-content {
        padding: 24px;
        max-height: 90vh;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .social-link {
        width: 100%;
    }
}