/* ==================== CSS变量 ==================== */
:root {
    --color-primary: #1089FF;
    --color-primary-dark: #0D78E6;
    --color-primary-light: #EDF4FF;
    --color-accent: #FF6B6B;
    --color-accent-alt: #FFB800;
    --color-success: #10B981;
    --bg-page: #F5F7FA;
    --bg-container: #FFFFFF;
    --text-title: #1A1A2E;
    --text-body: #4A5568;
    --text-muted: #718096;
    --border-color: #E2E8F0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --gradient-primary: linear-gradient(135deg, #1089FF 0%, #0D78E6 100%);
    --gradient-hero: linear-gradient(135deg, #1089FF 0%, #00D4FF 100%);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* ==================== 基础样式 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-body);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

img {
    max-width: 100%;
    height: auto;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    border-bottom-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

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

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-title);
    transition: all 0.3s ease;
}

/* ==================== Hero区域 ==================== */
.hero {
    position: relative;
    min-height: auto;
    display: flex;
    align-items: center;
    padding-top: 120px;
    padding-bottom: 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    opacity: 0.05;
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(16,137,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-text {
    max-width: 560px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-title);
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: var(--color-primary);
}

.hero-bullets {
    margin-bottom: 32px;
}

.hero-bullet {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 17px;
    color: var(--text-body);
    margin-bottom: 12px;
    line-height: 1.6;
}

.hero-bullet:last-child {
    margin-bottom: 0;
}

.bullet-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

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

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

.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #1a1a2e 0%, #2d2d44 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.1) inset;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-page);
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(16,137,255,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16,137,255,0.5);
}

.btn-secondary {
    background: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary-light);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 17px;
}

/* ==================== Section通用 ==================== */
    section {
        padding: 40px 0;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .section-header {
        margin-bottom: 24px;
    }

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-muted);
}

/* ==================== 核心特色 ==================== */
.features {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--bg-page);
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--color-primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.feature-icon svg {
    width: 36px;
    height: 36px;
}

.feature-icon.accent {
    background: rgba(255,107,107,0.1);
    color: var(--color-accent);
}

.feature-icon.success {
    background: rgba(16,185,129,0.1);
    color: var(--color-success);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 16px;
}

.feature-desc {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.7;
}

/* ==================== 优质用户展示 ==================== */
.featured-users {
    background: var(--bg-page);
}

.users-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.user-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
}

.user-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.user-photo {
    width: 100%;
    height: 280px;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.user-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.user-info {
    padding: 24px;
}

.user-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 8px;
}

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

/* ==================== AI择偶定位 ==================== */
.ai-matching {
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.ai-matching::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

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

.ai-matching .section-title {
    color: white;
    text-align: left;
    margin-bottom: 24px;
}

.ai-desc {
    font-size: 16px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 32px;
}

.ai-features {
    list-style: none;
}

.ai-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
}

.check-icon {
    width: 24px;
    height: 24px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.ai-visual {
    display: flex;
    justify-content: center;
}

.ai-screenshot {
    width: 280px;
    height: 560px;
    background: white;
    border-radius: 32px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-screenshot .screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.ai-diagram {
    position: relative;
    width: 360px;
    height: 360px;
}

.ai-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.ai-avatar {
    width: 80px;
    height: 80px;
    background: white;
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    box-shadow: 0 0 30px rgba(255,255,255,0.3);
}

.ai-orbit {
    position: absolute;
    inset: 0;
    border: 2px dashed rgba(255,255,255,0.3);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.ai-match {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    color: var(--color-primary);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    animation: fadeInOut 3s ease-in-out infinite;
    animation-delay: var(--delay);
}

.ai-match:nth-child(2) {
    top: auto;
    bottom: -10px;
}

.ai-match:nth-child(3) {
    top: 50%;
    left: auto;
    right: -40px;
    transform: translateY(-50%);
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* ==================== 认证体系 ==================== */
.authentication {
    background: white;
}

.auth-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.auth-cards-vertical {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.auth-card-vertical {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--bg-page);
    padding: 24px 28px;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

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

.auth-card-vertical .auth-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.auth-card-vertical .auth-icon svg {
    width: 28px;
    height: 28px;
}

.auth-info h3 {
    font-size: 18px;
    color: var(--text-title);
    margin-bottom: 6px;
    font-weight: 600;
}

.auth-info p {
    font-size: 14px;
    color: var(--text-muted);
}

.auth-visual {
    display: flex;
    justify-content: center;
}

.auth-screenshot-box {
    width: 280px;
    height: 560px;
    background: white;
    border-radius: 32px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-screenshot-box .screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ==================== 线下活动 ==================== */
.offline-events {
    background: var(--bg-page);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.event-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.event-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.event-photo {
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

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

.event-photo-bottom {
    position: relative;
}

.event-img-bottom {
    width: 100%;
    height: 200%;
    object-fit: cover;
    object-position: center bottom;
    position: absolute;
    bottom: 0;
    left: 0;
}

.event-photo-collage {
    display: flex;
    flex-direction: column;
}

.collage-top {
    height: 50%;
    overflow: hidden;
}

.collage-bottom {
    height: 50%;
    overflow: hidden;
}

.collage-bottom .collage-img {
    width: 100%;
    height: 200%;
    object-fit: cover;
    object-position: center bottom;
    transform: translateY(-50%);
}

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

.event-info {
    padding: 24px;
    text-align: center;
}

.event-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 8px;
}

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

/* ==================== 关于我们 ==================== */
.about {
    background: linear-gradient(135deg, #fafbfc 0%, #f0f4f8 100%);
}

.about-header {
    text-align: center;
    margin-bottom: 40px;
}

.about-badge {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 500;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.about-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.about-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.about-card:hover::before {
    opacity: 1;
}

.about-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-page);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--text-title);
}

.about-icon svg {
    width: 28px;
    height: 28px;
}

.about-icon-primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.about-card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 16px;
}

.about-card-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-body);
    margin-bottom: 20px;
}

.about-card-desc strong {
    color: var(--color-primary);
    font-weight: 500;
}

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

.about-tag {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-page);
    padding: 4px 12px;
    border-radius: 12px;
}

.about-highlight {
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    position: relative;
}

.highlight-quote {
    font-size: 48px;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 1;
    position: absolute;
    top: 4px;
    left: 12px;
    font-family: Georgia, serif;
}

.about-highlight p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    padding-left: 24px;
    font-style: italic;
}

/* ==================== FAQ ==================== */
.faq {
    background: var(--bg-page);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    padding: 18px 24px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-title);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: var(--color-primary);
    transition: transform 0.3s ease;
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 18px;
}

.faq-answer p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-body);
}

/* ==================== CTA ==================== */
.cta {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    padding: 60px 0;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-qrcodes {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.cta-qrcode {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qrcode-placeholder {
    width: 180px;
    height: 180px;
    background: white;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.qrcode-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 8px;
}

.cta-qrcode p {
    font-size: 14px;
    opacity: 0.9;
}

/* ==================== Footer ==================== */
.footer {
    background: var(--text-title);
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-brand .logo-icon {
    color: white;
    font-size: 28px;
}

.footer-desc {
    font-size: 14px;
    opacity: 0.7;
    margin-top: 16px;
    line-height: 1.7;
}

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

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    font-size: 14px;
    opacity: 0.7;
    padding: 8px 0;
    transition: opacity 0.3s ease;
}

.footer-column a:hover {
    opacity: 1;
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    opacity: 0.7;
}

.footer-icp {
    font-size: 12px;
}

/* ==================== 占位图片 ==================== */
.placeholder-image {
    width: 100%;
    height: 100%;
    background: var(--bg-page);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.placeholder-image span {
    font-size: 16px;
    font-weight: 500;
}

.placeholder-image small {
    font-size: 12px;
    margin-top: 8px;
}

/* ==================== 动画 ==================== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.animate-fade-left {
    opacity: 0;
    transform: translateX(30px);
    animation: fadeLeft 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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

@keyframes fadeLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 40px;
    }
    
    .features-grid,
    .auth-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .users-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .auth-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .auth-visual {
        order: -1;
    }
    
    .auth-screenshot-box {
        width: 240px;
        height: 440px;
    }
    
    .events-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .ai-visual {
        order: -1;
    }
    
    .ai-matching .section-title {
        text-align: center;
    }
    
    .ai-desc,
    .ai-features {
        text-align: center;
    }
    
    .ai-feature-item {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-top: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-image {
        order: -1;
    }
    
    .phone-mockup {
        width: 220px;
        height: 440px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid,
    .auth-cards,
    .events-grid,
    .users-grid,
    .about-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .user-photo {
        height: 320px;
    }
    
    .about-card {
        padding: 32px 24px;
    }
    
    .user-photo-placeholder {
        height: 280px;
    }
    
    .auth-card-vertical:hover {
        transform: translateY(-4px);
    }
    
    .cta-qrcodes {
        flex-direction: column;
        align-items: center;
        gap: 32px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .ai-diagram {
        width: 280px;
        height: 280px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}