/* ===== 全局样式 ===== */
:root {
    --primary-color: #1a8f4a;
    --primary-light: #2ecc71;
    --primary-dark: #148f3e;
    --secondary-color: #34495e;
    --accent-color: #f39c12;
    --text-color: #1a1a2e;
    --text-light: #4a5568;
    --text-muted: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --bg-gradient: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    
    /* 阴影层次 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.015);
    --shadow-glow: 0 0 40px rgba(46, 204, 113, 0.15);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* 滚动动画 CSS */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    filter: blur(8px);
    transition:
        opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        filter 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0px);
}

/* 交错动画 */
.stagger-children .reveal:nth-child(1) { transition-delay: 0.0s; }
.stagger-children .reveal:nth-child(2) { transition-delay: 0.08s; }
.stagger-children .reveal:nth-child(3) { transition-delay: 0.16s; }
.stagger-children .reveal:nth-child(4) { transition-delay: 0.24s; }
.stagger-children .reveal:nth-child(5) { transition-delay: 0.32s; }
.stagger-children .reveal:nth-child(6) { transition-delay: 0.40s; }
.stagger-children .reveal:nth-child(7) { transition-delay: 0.48s; }
.stagger-children .reveal:nth-child(8) { transition-delay: 0.56s; }
.stagger-children .reveal:nth-child(9) { transition-delay: 0.64s; }
.stagger-children .reveal:nth-child(10) { transition-delay: 0.72s; }
.stagger-children .reveal:nth-child(11) { transition-delay: 0.80s; }
.stagger-children .reveal:nth-child(12) { transition-delay: 0.88s; }

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        filter: none;
        transition: none;
    }
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.logo-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.9;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition-base);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

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

.cta-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: 0 4px 14px rgba(26, 143, 74, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 143, 74, 0.4);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(46, 204, 113, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse, rgba(26, 143, 74, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

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

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    color: var(--text-color);
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 8px 30px rgba(26, 143, 74, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(26, 143, 74, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--text-color);
    border: 2px solid rgba(26, 143, 74, 0.3);
}

.btn-outline:hover {
    background: rgba(26, 143, 74, 0.05);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* 聊天演示卡片 */
.hero-visual {
    perspective: 1000px;
}

.chat-demo {
    background: white;
    border-radius: 24px;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(0, 0, 0, 0.03);
    overflow: hidden;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: var(--transition-smooth);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: rotateY(-5deg) rotateX(5deg) translateY(0); }
    50% { transform: rotateY(-5deg) rotateX(5deg) translateY(-10px); }
}

.chat-demo:hover {
    transform: rotateY(0) rotateX(0);
    box-shadow: 
        0 30px 60px -12px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(0, 0, 0, 0.05);
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    font-weight: 500;
}

.chat-avatar {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

.chat-messages {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    padding: 14px 18px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    max-width: 85%;
}

.message.bot {
    background: var(--bg-light);
    color: var(--text-color);
    border-bottom-left-radius: 4px;
}

.message.user {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

/* ===== 通用区块样式 ===== */
.section-title {
    font-size: clamp(32px, 4vw, 42px);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    text-align: center;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 56px;
    text-align: center;
    line-height: 1.7;
}

/* ===== 核心能力 ===== */
.features {
    padding: 120px 0;
    background: var(--bg-white);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.05), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg-white);
    padding: 36px 28px;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid rgba(0, 0, 0, 0.03);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(26, 143, 74, 0.1);
}

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

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(26, 143, 74, 0.2);
    transition: var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(26, 143, 74, 0.3);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

/* 功能图标样式 */
.docx-icon { background: linear-gradient(135deg, #2b579a, #3b6dc4); }
.image-icon { background: linear-gradient(135deg, #9333ea, #a855f7); }
.voice-icon { background: linear-gradient(135deg, #7c3aed, #8b5cf6); }
.web-icon { background: linear-gradient(135deg, #ea580c, #f97316); }
.data-icon { background: linear-gradient(135deg, #6366f1, #818cf8); }
.video-icon { background: linear-gradient(135deg, #0891b2, #06b6d4); }

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 14px;
}

/* ===== 技能市场 ===== */
.skills-section {
    padding: 120px 0;
    background: var(--bg-light);
    position: relative;
}

.skills-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.05), transparent);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.skill-item {
    background: white;
    padding: 24px 20px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition-smooth);
    border: 1px solid rgba(0, 0, 0, 0.03);
    cursor: pointer;
}

.skill-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(26, 143, 74, 0.15);
}

.skill-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.skill-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

/* 技能图标颜色 */
.skill-docx { background: linear-gradient(135deg, #2b579a, #3b6dc4); }
.skill-excel { background: linear-gradient(135deg, #217346, #2e8c57); }
.skill-pptx { background: linear-gradient(135deg, #d24726, #e85a3a); }
.skill-image { background: linear-gradient(135deg, #9333ea, #a855f7); }
.skill-markitdown { background: linear-gradient(135deg, #06b6d4, #22d3ee); }
.skill-whisper { background: linear-gradient(135deg, #7c3aed, #8b5cf6); }
.skill-pdf { background: linear-gradient(135deg, #dc2626, #ef4444); }
.skill-web { background: linear-gradient(135deg, #ea580c, #f97316); }
.skill-find { background: linear-gradient(135deg, #10b981, #34d399); }
.skill-video { background: linear-gradient(135deg, #0891b2, #06b6d4); }
.skill-drawio { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.skill-creator { background: linear-gradient(135deg, #ec4899, #f472b6); }

.skill-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 4px;
}

.skill-info p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 功能展示 ===== */
.showcase {
    padding: 120px 0;
    background: var(--bg-white);
}

.showcase-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-base);
}

.tab-btn:hover {
    color: var(--primary-color);
    background: rgba(26, 143, 74, 0.05);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 4px 15px rgba(26, 143, 74, 0.3);
}

.showcase-content {
    max-width: 900px;
    margin: 0 auto;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.showcase-demo {
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.demo-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    background: #f8fafc;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.demo-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.demo-header .filename {
    margin-left: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.demo-content {
    padding: 32px;
}

.demo-content h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-color);
}

.demo-content ul {
    list-style: none;
}

.demo-content ul li {
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 12px;
}

.demo-content ul li::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
}

.image-placeholder {
    background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
    border-radius: 16px;
    padding: 60px;
    text-align: center;
    border: 2px dashed rgba(26, 143, 74, 0.2);
}

.image-placeholder p {
    color: var(--text-muted);
    margin-bottom: 12px;
}

.image-placeholder small {
    color: var(--primary-color);
    font-weight: 500;
}

/* ===== 统计数据 ===== */
.stats {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: clamp(36px, 5vw, 52px);
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 15px;
    opacity: 0.9;
    font-weight: 500;
}

/* ===== 联系方式 ===== */
.contact {
    padding: 120px 0;
    background: var(--bg-white);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.05), transparent);
}

.contact h2 {
    font-size: clamp(32px, 4vw, 42px);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.contact p {
    font-size: 17px;
    color: var(--text-muted);
    margin-bottom: 48px;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.contact-card {
    background: white;
    padding: 32px 24px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: var(--transition-smooth);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(26, 143, 74, 0.15);
}

.contact-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

/* 联系图标颜色 */
.email-icon { background: linear-gradient(135deg, #2b579a, #3b6dc4); }
.wechat-icon { background: linear-gradient(135deg, #07c160, #06ad56); }
.docs-icon { background: linear-gradient(135deg, var(--primary-color), var(--primary-light)); }

.contact-card h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
}

.cta-box {
    background: var(--bg-gradient);
    padding: 48px;
    border-radius: 24px;
    text-align: center;
    border: 1px solid rgba(26, 143, 74, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.cta-box h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 12px;
}

.cta-box p {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.btn-large {
    padding: 18px 48px;
    font-size: 17px;
}

/* ===== 页脚 ===== */
.footer {
    background: #0f172a;
    color: white;
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 80px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand .logo-icon {
    width: 44px;
    height: 44px;
}

.footer-brand span {
    font-size: 22px;
    font-weight: 700;
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 1.7;
    max-width: 280px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 15px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 14px;
    font-size: 14px;
    transition: var(--transition-base);
}

.footer-column a:hover {
    color: var(--primary-light);
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-subtitle {
        margin: 0 auto 36px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .features-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-box {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .features,
    .skills-section,
    .showcase,
    .contact {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}