/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 蓝白科技感配色方案 */
    --primary-blue: #2563eb;
    --primary-blue-hover: #1d4ed8;
    --primary-blue-light: rgba(37, 99, 235, 0.1);
    --secondary-blue: #3b82f6;
    --accent-blue: #60a5fa;
    --light-blue: #93c5fd;
    --tech-blue: #1e40af;
    --electric-blue: #0ea5e9;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-light: #64748b;
    --text-accent: #2563eb;
    --text-white: #ffffff;
    --background-primary: #ffffff;
    --background-secondary: #f8fafc;
    --background-accent: #e2e8f0;
    --background-card: rgba(255, 255, 255, 0.95);
    --background-glass: rgba(248, 250, 252, 0.9);
    --background-blue: #f0f9ff;
    --border-color: rgba(37, 99, 235, 0.2);
    --border-light: rgba(148, 163, 184, 0.2);
    --border-glow: rgba(37, 99, 235, 0.5);
    --success-green: #10b981;
    --warning-orange: #f59e0b;
    --error-red: #ef4444;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;
}

/* Base Typography */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--background-primary) 0%, var(--background-blue) 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(96, 165, 250, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-4xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-blue-hover);
}

/* Utility Classes */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-white);
    border: 1px solid var(--border-glow);
    box-shadow: 
        0 4px 15px rgba(37, 99, 235, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-blue-hover) 0%, var(--tech-blue) 100%);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: 
        0 8px 30px rgba(37, 99, 235, 0.5),
        0 0 20px rgba(37, 99, 235, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--primary-blue-light);
    border-color: var(--border-glow);
    color: var(--text-accent);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

/* 已移除重复的hover样式 */

.btn-outline {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-outline:hover {
    background-color: var(--primary-blue);
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.link-with-arrow {
    display: inline-flex;
    align-items: center;
    color: var(--primary-blue);
    font-weight: 500;
    text-decoration: none;
}

.link-with-arrow::after {
    content: '→';
    margin-left: var(--spacing-sm);
    transition: transform 0.2s ease;
}

.link-with-arrow:hover::after {
    transform: translateX(4px);
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.05),
        0 0 20px rgba(37, 99, 235, 0.1);
    z-index: 1000;
}

.nav {
    height: 100%;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease;
}

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

.nav-dropdown {
    position: relative;
}

.dropdown-trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.dropdown-trigger::after {
    content: '▾';
    font-size: var(--font-size-xs);
    transition: transform 0.2s ease;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 100;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-light);
    transition: background-color 0.2s ease;
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background-color: var(--background-secondary);
    color: var(--primary-blue);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    gap: 3px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

/* 默认隐藏移动端菜单 */
.mobile-menu {
    display: none;
}

.mobile-menu-toggle:hover {
    background-color: var(--background-accent);
}

.mobile-menu-toggle span {
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 1px;
    transform-origin: center;
}

/* 激活状态的汉堡菜单动画 */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Main Content */
.main {
    margin-top: var(--header-height);
}

/* Hero Section */
.hero {
    padding: var(--spacing-4xl) 0;
    background: 
        linear-gradient(135deg, var(--background-blue) 0%, var(--background-primary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0, 255, 204, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-signup {
    margin-top: var(--spacing-xl);
}

.hero-signup .btn {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 480px;
}

.email-input {
    flex: 1;
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--background-glass);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.email-input:focus {
    outline: none;
    border-color: var(--border-glow);
    box-shadow: 
        0 0 20px rgba(37, 99, 235, 0.3),
        inset 0 1px 0 rgba(37, 99, 235, 0.1);
}

.email-input::placeholder {
    color: var(--text-secondary);
}

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

.hero-visual {
    position: relative;
    width: min(880px, 100%);
    display: flex;
    justify-content: center;
    align-items: center;
}

.bg-blob {
    position: absolute;
    filter: blur(40px);
    opacity: 0.35;
    z-index: 0;
}
.blob-1 { width: 300px; height: 300px; background: radial-gradient(circle, #22D3EE 0%, rgba(34,211,238,0) 70%); top: -40px; left: -40px; border-radius: 50%; }
.blob-2 { width: 380px; height: 380px; background: radial-gradient(circle, #2563EB 0%, rgba(37,99,235,0) 70%); bottom: -60px; right: -60px; border-radius: 50%; }

.hero-screens {
    position: relative;
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    justify-content: center;
    width: auto;
    max-width: none;
    z-index: 1;
}

.screen-wrap { position: relative; }
.tilt-left { transform: rotate(-2deg); }
.tilt-right { transform: rotate(2deg); }

.hero-screen { width: 300px; height: 600px; object-fit: contain; border-radius: 16px; box-shadow: var(--shadow-xl); background: var(--background-card); backdrop-filter: blur(20px); border: 1px solid var(--border-color); }
.hero-screen-mini { width: 180px; height: 120px; object-fit: cover; border-radius: 12px; box-shadow: var(--shadow-lg); background: var(--background-card); backdrop-filter: blur(20px); border: 1px solid var(--border-color); }
.screen-wrap.mini { position: absolute; bottom: -20px; right: -20px; transform: rotate(-1deg); }

/* 已移除浮动图标相关样式 */
/* 已移除浮动图标位置样式 */

@keyframes float { 0%,100%{ transform: translateY(0);} 50%{ transform: translateY(-8px);} }

@keyframes slideInFromLeft { 0%{ transform: translateX(-100%); opacity: 0;} 100%{ transform: translateX(0); opacity: 1;} }

@keyframes slideInFromRight { 0%{ transform: translateX(100%); opacity: 0;} 100%{ transform: translateX(0); opacity: 1;} }

@keyframes pulse { 0%,100%{ transform: scale(1);} 50%{ transform: scale(1.05);} }

@keyframes shimmer { 0%{ background-position: -200% 0;} 100%{ background-position: 200% 0;} }

@keyframes glow { 0%,100%{ box-shadow: 0 0 20px rgba(37,99,235,0.3);} 50%{ box-shadow: 0 0 40px rgba(37,99,235,0.6);} }

/* Crypto Prices Section */
.crypto-prices {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--background-primary) 0%, var(--background-blue) 100%);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.price-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.tab-btn {
    background: none;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.tab-btn.active,
.tab-btn:hover {
    color: var(--primary-blue);
    background-color: var(--primary-blue-light);
}

.crypto-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 100%;
    margin: 0 auto;
}

.crypto-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: var(--background-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.crypto-item:hover {
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.2),
        0 0 20px rgba(0, 212, 255, 0.2);
    transform: translateY(-3px);
    border-color: var(--border-glow);
}

.crypto-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.crypto-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--background-secondary);
}

.crypto-icon-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.crypto-icon-fallback {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
}

.crypto-details h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: 2px;
}

.crypto-price {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.crypto-change {
    text-align: right;
}

.change-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.change-positive {
    color: var(--success-green);
    background-color: rgba(0, 211, 149, 0.1);
}

.change-negative {
    color: var(--error-red);
    background-color: rgba(255, 71, 71, 0.1);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-xl) 0 var(--spacing-4xl);
    background: var(--background-blue) !important;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--background-blue);
    z-index: 0;
}

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

.cta-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    background: var(--background-primary) !important;
    border: 1px solid var(--border-color);
    box-shadow: 
        0 8px 25px rgba(37, 99, 235, 0.1),
        inset 0 1px 0 rgba(37, 99, 235, 0.05);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    width: 100%;
    position: relative;
    z-index: 2;
}

.cta-badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary-blue-light);
    border: 1px solid var(--border-color);
    color: var(--text-accent);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.cta-text h2 {
    font-size: var(--font-size-4xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.cta-text p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.cta-signup .email-input {
    background: var(--background-glass);
    border-color: var(--border-color);
}

.cta-signup .btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-white);
    border: 1px solid var(--border-glow);
}

.cta-signup .btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-blue-hover) 0%, var(--tech-blue) 100%);
    box-shadow: 
        0 8px 30px rgba(37, 99, 235, 0.5),
        0 0 20px rgba(37, 99, 235, 0.3);
}

.cta-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.cta-img {
    max-width: 100%;
    height: auto;
    animation: float 4s ease-in-out infinite;
}

/* Features Section */
.features {
    padding: var(--spacing-4xl) 0;
    background: var(--background-primary);
    position: relative;
}

.features-grid {
    display: grid;
    gap: var(--spacing-3xl);
}

.features::before {
    content: "";
    position: absolute;
    inset: -20% -10% auto -10%;
    height: 60%;
    background: radial-gradient(60% 60% at 10% 10%, rgba(37,99,235,0.08), rgba(0,0,0,0) 70%);
    pointer-events: none;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    background: var(--background-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: 
        0 12px 30px rgba(37, 99, 235, 0.08),
        inset 0 1px 0 rgba(37, 99, 235, 0.1);
    transition: transform .25s ease, box-shadow .25s ease;
    position: relative;
}

.feature-card:hover { 
    transform: translateY(-6px); 
    box-shadow: 
        0 20px 50px rgba(37, 99, 235, 0.15),
        0 0 30px rgba(37, 99, 235, 0.2),
        inset 0 1px 0 rgba(37, 99, 235, 0.3);
    border-color: var(--border-glow);
}

/* 功能卡片样式 */

.feature-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.feature-dynamic-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-dynamic-img {
    transform: scale(1.05);
}

/* 偶数卡片图片在左侧 */
.feature-card:nth-child(even) {
    grid-template-columns: 1fr 1fr;
}

.feature-card:nth-child(even) .feature-content {
    order: 2;
}

.feature-card:nth-child(even) .feature-image {
    order: 1;
}

.feature-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* 已移除特性图标样式 */

.feature-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.feature-brand img {
    width: 24px;
    height: 24px;
}

.feature-brand span {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.feature-text h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.feature-text p {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.feature-link {
    color: var(--primary-blue);
    font-weight: 500;
    text-decoration: none;
}

.feature-link:hover {
    text-decoration: underline;
}

.feature-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-image img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

/* Quick Start Section */
.quick-start {
    padding: var(--spacing-4xl) 0;
    background: var(--background-secondary);
    position: relative;
    overflow: hidden;
}

.quick-start-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    background: var(--background-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    box-shadow: 
        0 15px 40px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(0, 212, 255, 0.1);
}

.quick-start::before {
    content: "";
    position: absolute;
    width: 700px;
    height: 700px;
    right: -280px;
    top: -320px;
    background: conic-gradient(from 180deg at 50% 50%, rgba(37,99,235,0.08), rgba(34,211,238,0.08), rgba(37,99,235,0.08));
    filter: blur(40px);
}

.quick-start-text h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.quick-start-text p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

.quick-start-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: stretch;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    background: var(--background-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: 
        0 4px 15px rgba(37, 99, 235, 0.08),
        inset 0 1px 0 rgba(37, 99, 235, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 25px rgba(37, 99, 235, 0.15),
        inset 0 1px 0 rgba(37, 99, 235, 0.2);
}

.stat-item h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(90deg, #2563EB 0%, #22D3EE 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    flex-shrink: 0;
}

.stat-item p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
    text-align: right;
    font-weight: 500;
}

/* Trust Section */
.trust-section {
    padding: var(--spacing-4xl) 0;
    background-color: var(--background-secondary);
    position: relative;
    overflow: hidden;
}

.trust-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
    align-items: center;
    text-align: center;
}

.trust-text {
    max-width: 800px;
    margin-bottom: var(--spacing-xl);
}

.trust-text h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.trust-text p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.trust-features { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 1000px;
    width: 100%;
}
.trust-feature {
    position: relative;
    padding: var(--spacing-xl);
    background: var(--background-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: 
        0 4px 15px rgba(37, 99, 235, 0.08),
        inset 0 1px 0 rgba(37, 99, 235, 0.1);
    transition: all 0.3s ease;
    text-align: left;
    overflow: hidden;
}
.trust-feature:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 8px 25px rgba(37, 99, 235, 0.15),
        inset 0 1px 0 rgba(37, 99, 235, 0.2);
    border-color: var(--border-glow);
}

/* 每个卡片的顶部彩色条 */
.trust-feature:nth-child(1)::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
}

.trust-feature:nth-child(2)::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #22D3EE, #0ea5e9);
}

.trust-feature:nth-child(3)::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #10B981, #34d399);
}

.trust-feature:nth-child(4)::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #F59E0B, #fbbf24);
}
.trust-feature h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
}

.trust-feature p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 合作伙伴轮播 */
.partners-carousel {
    margin-top: var(--spacing-4xl);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.partners-carousel h3 {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-weight: 500;
}

.carousel-container {
    overflow: hidden;
    width: 100%;
    position: relative;
}

.carousel-track {
    display: flex;
    animation: scroll 30s linear infinite;
    width: auto; /* adapt to content width */
}

.partner-logo {
    flex-shrink: 0;
    width: 120px;
    height: 40px;
    margin-right: var(--spacing-lg);
    opacity: 0.7;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.partner-logo:hover {
    opacity: 1;
    transform: scale(1.05);
}

.partner-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 6px;
    filter: grayscale(20%);
    transition: filter 0.3s ease;
}

.partner-logo:hover img {
    filter: grayscale(0%);
}

/* 轮播动画 */
@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%); /* 移动50%因为我们重复了logo */
    }
}

/* 悬停时暂停动画 */
.carousel-container:hover .carousel-track {
    animation-play-state: paused;
}

/* Learn Section */
.learn-section {
    padding: var(--spacing-4xl) 0;
    background: var(--background-primary);
    position: relative;
}

.learn-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 25% 75%, rgba(102, 0, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 25%, rgba(0, 212, 255, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

/* 移除可能导致滚动问题的shimmer动画 */

.learn-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.learn-text h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.learn-text p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

.learn-articles {
    display: grid;
    gap: var(--spacing-xl);
}

.article-card {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--background-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 
        0 4px 15px rgba(37, 99, 235, 0.08),
        inset 0 1px 0 rgba(37, 99, 235, 0.1);
}

.article-card:hover { 
    transform: translateY(-4px); 
    box-shadow: 
        0 8px 25px rgba(37, 99, 235, 0.15),
        0 0 20px rgba(37, 99, 235, 0.1),
        inset 0 1px 0 rgba(37, 99, 235, 0.2);
    border-color: var(--border-glow);
}

.article-card img {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.article-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.article-card p {
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin: 0;
    color: var(--text-secondary);
}

/* Final CTA Section */
.final-cta {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--background-secondary) 0%, var(--background-accent) 100%);
    position: relative;
    overflow: hidden;
}

.final-cta-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.final-cta-text h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
}

.final-cta-text p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

.final-cta-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.final-cta-image img {
    max-width: 100%;
    height: auto;
}

.freedom-dynamic-img {
    max-width: 350px;
    height: auto;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 10px 25px rgba(37, 99, 235, 0.2));
    transition: transform 0.3s ease;
}

.freedom-dynamic-img:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 15px 35px rgba(37, 99, 235, 0.3));
}

.final-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(60% 60% at 70% 30%, rgba(37,99,235,0.15), rgba(0,0,0,0) 60%);
    pointer-events: none;
}

/* Start Portfolio Section */
.start-portfolio {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--tech-blue) 100%);
    color: var(--text-white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.start-portfolio h2 {
    font-size: var(--font-size-4xl);
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.start-portfolio p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
}

.start-portfolio .btn-primary {
    background-color: var(--primary-blue);
}

.start-portfolio::before {
    content: "";
    position: absolute;
    left: -10%; right: -10%; top: -40px; height: 120px;
    background: linear-gradient(90deg, rgba(255,255,255,0.08), rgba(255,255,255,0));
    transform: skewY(-4deg);
}

/* Footer */
.footer {
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
    background-color: var(--background-secondary);
    border-top: 1px solid var(--border-light);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-4xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-logo {
    width: 32px;
    height: 32px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.social-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.social-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.social-links span {
    color: var(--text-light);
}

.footer-language {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.language-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: color 0.2s ease;
}

.footer-column a:hover {
    color: var(--primary-blue);
}

/* Responsive Design */

/* Desktop (确保桌面端显示正确) */
@media (min-width: 769px) {
    .nav-actions {
        display: flex !important;
    }
    
    .mobile-menu-toggle {
        display: none !important;
    }
    
    .mobile-menu {
        display: none !important;
    }
}

@media (min-width: 1440px) {
    :root { --container-max-width: 1320px; }
}

@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-content,
    .cta-content,
    .quick-start-content,
    .learn-content,
    .final-cta-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .trust-content {
        gap: var(--spacing-xl);
    }
    
    .trust-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        max-width: 100%;
    }
    
    .trust-feature {
        padding: var(--spacing-lg);
    }
    
    .feature-card {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .feature-card:nth-child(even) .feature-content {
        order: 1;
    }
    
    .feature-card:nth-child(even) .feature-image {
        order: 2;
    }
    

    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.375rem;
        --font-size-2xl: 1.25rem;
        --font-size-xl: 1.125rem;
        --font-size-lg: 1rem;
        --spacing-4xl: 3rem;
        --spacing-3xl: 2.5rem;
        --spacing-2xl: 2rem;
        --spacing-xl: 1.5rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* 隐藏桌面版登录注册按钮 */
    .nav-actions {
        display: none;
    }
    
    /* 移动端菜单样式 */
    .mobile-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(20px);
        z-index: 9999;
        transition: right 0.3s ease;
        display: block;
    }
    
    .mobile-menu.active {
        right: 0;
    }
    
    .mobile-menu-content {
        position: absolute;
        top: 0;
        right: 0;
        width: 280px;
        height: 100vh;
        background: var(--background-primary);
        border-left: 1px solid var(--border-color);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
        display: flex;
        flex-direction: column;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }
    
    .mobile-menu.active .mobile-menu-content {
        transform: translateX(0);
    }
    
    .mobile-menu-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-lg);
        border-bottom: 1px solid var(--border-light);
    }
    
    .mobile-menu-close {
        background: none;
        border: none;
        font-size: 24px;
        color: var(--text-primary);
        cursor: pointer;
        padding: 8px;
        border-radius: 4px;
        transition: background-color 0.2s ease;
        min-width: 40px;
        min-height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-menu-close:hover {
        background-color: var(--background-accent);
    }
    
    .mobile-menu-actions {
        padding: var(--spacing-xl) var(--spacing-lg);
        display: flex;
        flex-direction: column;
        gap: var(--spacing-md);
        margin-top: auto;
        margin-bottom: var(--spacing-xl);
    }
    
    .mobile-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 14px 24px;
        border-radius: 8px;
        font-size: var(--font-size-base);
        font-weight: 600;
        text-decoration: none;
        transition: all 0.2s ease;
        min-height: 48px;
        text-align: center;
    }
    
    .mobile-btn-secondary {
        background: transparent;
        color: var(--text-primary);
        border: 2px solid var(--border-color);
    }
    
    .mobile-btn-secondary:hover {
        background: var(--background-accent);
        border-color: var(--primary-blue);
        color: var(--primary-blue);
    }
    
    .mobile-btn-primary {
        background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
        color: var(--text-white);
        border: 2px solid transparent;
        box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    }
    
    .mobile-btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    }
    
    /* 移动端菜单在小屏下的优化 */
    @media (max-width: 480px) {
        .mobile-menu-content {
            width: 100%;
        }
        
        .mobile-menu-header {
            padding: var(--spacing-md);
        }
        
        .mobile-menu-actions {
            padding: var(--spacing-lg) var(--spacing-md);
        }
        
        .mobile-btn {
            padding: 12px 20px;
            font-size: var(--font-size-sm);
            min-height: 44px;
        }
    }
    
    /* Hero Section 手机端优化 */
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-content {
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .hero-image {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        max-width: 350px;
        margin: 0 auto;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
        line-height: 1.2;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
        line-height: 1.6;
        margin-bottom: var(--spacing-lg);
        padding: 0 var(--spacing-sm);
    }
    
    .hero-screens { 
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-sm);
        flex-wrap: nowrap; 
    }
    
    .hero-screen { 
        width: 140px; 
        height: 280px; 
        border-radius: 12px; 
        box-shadow: var(--shadow-lg);
        flex-shrink: 0;
    }
    
    .hero-screen-mini { width: 140px; height: 96px; }
    .screen-wrap.mini { bottom: -12px; right: -8px; }
    
    /* 按钮优化 */
    .btn {
        padding: 12px 24px;
        font-size: var(--font-size-base);
        border-radius: 8px;
    }
    
    .hero-signup .btn {
        padding: 14px 32px;
        font-size: var(--font-size-lg);
        font-weight: 600;
    }
    
    .input-group {
        flex-direction: column;
        max-width: 100%;
    }
    
    /* Crypto Prices Section */
    .crypto-prices {
        padding: var(--spacing-xl) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-lg);
        text-align: center;
    }
    
    .section-header h2 {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .section-header p {
        font-size: var(--font-size-base);
        padding: 0 var(--spacing-sm);
    }
    
    .crypto-list { 
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .crypto-item {
        padding: var(--spacing-md);
        border-radius: 12px;
    }
    
    .crypto-info h4 {
        font-size: var(--font-size-base);
        margin-bottom: 2px;
    }
    
    .crypto-info p {
        font-size: var(--font-size-sm);
    }
    
    .crypto-price h4 {
        font-size: var(--font-size-lg);
    }
    
    .crypto-price p {
        font-size: var(--font-size-sm);
    }
    
    /* CTA Section */
    .cta-section {
        padding: var(--spacing-xl) 0;
    }
    
    .cta-content {
        padding: var(--spacing-xl);
        border-radius: 16px;
        text-align: center;
    }
    
    .cta-text h2 {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-md);
    }
    
    .cta-text p {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-lg);
    }
    
    .cta-img { 
        max-height: 200px;
        width: auto;
        margin: 0 auto;
    }
    
    /* Features Section */
    .features {
        padding: var(--spacing-xl) 0;
    }
    
    .feature-card {
        padding: var(--spacing-lg);
        border-radius: 16px;
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .feature-content {
        order: 2;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
    
    .feature-image {
        order: 1;
        margin-bottom: var(--spacing-md);
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
    }
    
    .feature-content h3 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
        text-align: center;
        min-height: 3rem; /* 确保标题高度一致 */
        display: flex;
        align-items: center;
        justify-content: center;
        line-height: 1.3;
    }
    
    .feature-content p {
        font-size: var(--font-size-base);
        line-height: 1.6;
        text-align: center;
        margin: 0;
        min-height: 5rem; /* 确保描述高度一致 */
        display: flex;
        align-items: center;
    }
    
    .feature-dynamic-img {
        max-width: 280px;
        max-height: 200px;
        width: auto;
        height: auto;
        object-fit: contain;
    }
    
    .feature-brand {
        justify-content: center;
        margin-bottom: var(--spacing-sm);
    }
    
    /* Quick Start Section */
    .quick-start {
        padding: var(--spacing-xl) 0;
    }
    
    .quick-start-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .stat-item {
        padding: var(--spacing-md);
        border-radius: 12px;
    }
    
    .stat-item h3 {
        font-size: var(--font-size-xl);
    }
    
    .stat-item p {
        font-size: var(--font-size-sm);
    }
    
    /* Trust Section */
    .trust-section {
        padding: var(--spacing-xl) 0;
    }
    
    .trust-text h2 {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-md);
    }
    
    .trust-text p {
        font-size: var(--font-size-base);
        padding: 0 var(--spacing-sm);
    }
    
    .trust-feature {
        padding: var(--spacing-md);
        border-radius: 12px;
    }
    
    .trust-feature h3 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-sm);
    }
    
    .trust-feature p {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    /* Partners Carousel */
    .partners-carousel {
        padding: var(--spacing-lg) 0;
    }
    
    .partners-carousel h3 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-md);
    }
    
    /* Learn Section */
    .learn-section {
        padding: var(--spacing-xl) 0;
    }
    
    .learn-content {
        gap: var(--spacing-lg);
    }
    
    .learn-text h2 {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .learn-text p {
        font-size: var(--font-size-base);
    }
    
    .article-card {
        flex-direction: row;
        text-align: left;
        padding: var(--spacing-md);
        border-radius: 12px;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .article-card img {
        width: 80px;
        height: 60px;
        object-fit: cover;
        border-radius: 8px;
        margin-bottom: 0;
        margin-right: var(--spacing-sm);
        flex-shrink: 0;
    }
    
    .article-card .article-content {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
    }
    
    .article-card h4 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
    }
    
    .article-card p {
        font-size: var(--font-size-sm);
        line-height: 1.5;
        margin: 0;
    }
    
    /* Final CTA & Start Portfolio */
    .final-cta,
    .start-portfolio {
        padding: var(--spacing-xl) 0;
    }
    
    .final-cta h2,
    .start-portfolio h2 {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .final-cta p,
    .start-portfolio p {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-lg);
    }
    
    .freedom-dynamic-img {
        max-width: 280px;
        max-height: 200px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.875rem;
        --font-size-4xl: 1.625rem;
        --font-size-3xl: 1.25rem;
        --font-size-2xl: 1.125rem;
        --font-size-xl: 1rem;
        --font-size-lg: 0.9375rem;
        --spacing-4xl: 2.5rem;
        --spacing-3xl: 2rem;
        --spacing-2xl: 1.5rem;
        --spacing-xl: 1.25rem;
        --spacing-lg: 1rem;
        --spacing-md: 0.75rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    /* 进一步优化小屏间距 */
    .hero,
    .crypto-prices,
    .features,
    .quick-start,
    .trust-section,
    .learn-section,
    .final-cta,
    .start-portfolio {
        padding: var(--spacing-lg) 0;
    }
    
    .cta-section {
        padding: var(--spacing-md) 0 var(--spacing-lg);
    }
    
    /* Hero Section 小屏优化 */
    .hero-title {
        font-size: var(--font-size-3xl);
        line-height: 1.2;
        margin-bottom: var(--spacing-sm);
    }
    
    .hero-description {
        font-size: var(--font-size-sm);
        line-height: 1.5;
        margin-bottom: var(--spacing-md);
        padding: 0 var(--spacing-xs);
    }
    
    .hero-screens { 
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-xs);
        flex-wrap: nowrap;
    }
    
    .hero-screen { 
        width: 120px; 
        height: 240px;
        flex-shrink: 0;
    }
    
    .hero-image {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .hero-signup .btn {
        padding: 12px 24px;
        font-size: var(--font-size-base);
    }
    
    /* Section headers 小屏优化 */
    .section-header {
        margin-bottom: var(--spacing-md);
        padding: 0 var(--spacing-xs);
    }
    
    .section-header h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
    }
    
    .section-header p {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    /* Crypto list 小屏优化 */
    .crypto-item {
        padding: var(--spacing-sm);
        border-radius: 10px;
    }
    
    .crypto-info h4 {
        font-size: var(--font-size-sm);
        margin-bottom: 1px;
    }
    
    .crypto-info p {
        font-size: var(--font-size-xs);
    }
    
    .crypto-price h4 {
        font-size: var(--font-size-base);
    }
    
    .crypto-price p {
        font-size: var(--font-size-xs);
    }
    
    /* CTA Section 小屏优化 */
    .cta-content {
        padding: var(--spacing-lg);
        border-radius: 14px;
    }
    
    .cta-text h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-sm);
        line-height: 1.3;
    }
    
    .cta-text p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-md);
        line-height: 1.5;
    }
    
    .cta-img { 
        max-height: 160px;
        margin-top: var(--spacing-sm);
    }
    
    /* Feature cards 小屏优化 */
    .feature-card {
        padding: var(--spacing-md);
        border-radius: 14px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: auto;
        text-align: center;
    }
    
    .feature-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 100%;
        order: 2;
    }
    
    .feature-image {
        order: 1;
        margin-bottom: var(--spacing-sm);
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
    }
    
    .feature-content h3 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
        text-align: center;
        min-height: 2.6rem; /* 确保标题高度一致 */
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .feature-content p {
        font-size: var(--font-size-sm);
        line-height: 1.5;
        text-align: center;
        margin: 0;
        min-height: 4rem; /* 确保描述高度一致 */
        display: flex;
        align-items: center;
    }
    
    .feature-dynamic-img {
        max-width: 240px;
        max-height: 160px;
        width: auto;
        height: auto;
        object-fit: contain;
    }
    
    .feature-brand {
        justify-content: center;
        margin-bottom: var(--spacing-xs);
    }
    
    /* Quick start stats 小屏优化 */
    .quick-start-stats {
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        padding: var(--spacing-sm);
        border-radius: 10px;
    }
    
    .stat-item h3 {
        font-size: var(--font-size-lg);
    }
    
    .stat-item p {
        font-size: var(--font-size-xs);
    }
    
    /* Trust features 小屏优化 */
    .trust-text h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-sm);
        line-height: 1.3;
    }
    
    .trust-text p {
        font-size: var(--font-size-sm);
        padding: 0 var(--spacing-xs);
        line-height: 1.5;
    }
    
    .trust-feature {
        padding: var(--spacing-sm);
        border-radius: 10px;
    }
    
    .trust-feature h3 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
    }
    
    .trust-feature p {
        font-size: var(--font-size-xs);
        line-height: 1.4;
    }
    
    /* Partners carousel 小屏优化 */
    .partners-carousel {
        margin-top: var(--spacing-lg);
        padding: var(--spacing-md) 0;
    }
    
    .partners-carousel h3 {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .carousel-track {
        animation-duration: 20s;
    }
    
    .partner-logo {
        width: 90px;
        height: 28px;
        margin-right: var(--spacing-sm);
    }
    
    /* Learn section 小屏优化 */
    .learn-text h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
    }
    
    .learn-text p {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    .article-card {
        flex-direction: row;
        text-align: left;
        padding: var(--spacing-sm);
        border-radius: 10px;
        gap: var(--spacing-xs);
        align-items: flex-start;
    }
    
    .article-card img {
        width: 64px;
        height: 48px;
        object-fit: cover;
        border-radius: 6px;
        margin-bottom: 0;
        margin-right: var(--spacing-xs);
        flex-shrink: 0;
    }
    
    .article-card .article-content {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
    }
    
    .article-card h4 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
    }
    
    .article-card p {
        font-size: var(--font-size-xs);
        line-height: 1.4;
        margin: 0;
    }
    
    /* Final sections 小屏优化 */
    .final-cta h2,
    .start-portfolio h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-xs);
        line-height: 1.3;
    }
    
    .final-cta p,
    .start-portfolio p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-md);
        line-height: 1.5;
    }
    
    .freedom-dynamic-img {
        max-width: 240px;
        max-height: 160px;
    }
    
    /* Button 小屏优化 */
    .btn {
        padding: 10px 18px;
        font-size: var(--font-size-sm);
        border-radius: 6px;
    }
    
    .btn-large {
        padding: 12px 20px;
        font-size: var(--font-size-base);
    }
    
    /* 移动端触摸优化 */
    .btn,
    .crypto-item,
    .feature-card,
    .article-card,
    .trust-feature,
    .stat-item {
        min-height: 44px; /* iOS 推荐的最小触摸目标 */
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    /* 移动端导航优化 */
    .nav-container {
        height: 64px; /* 减少移动端导航高度 */
    }
    
    .mobile-menu-toggle {
        padding: 8px;
        min-width: 44px;
        min-height: 44px;
    }
    
    /* 移动端图片懒加载占位 */
    .hero-screen,
    .feature-dynamic-img,
    .cta-img,
    .article-card img {
        background: var(--background-accent);
        transition: opacity 0.3s ease;
    }
    
    /* 移动端滚动优化 */
    .carousel-container {
        -webkit-overflow-scrolling: touch;
        scroll-behavior: smooth;
    }
    
    /* 移动端动画性能优化 */
    .crypto-item,
    .feature-card,
    .article-card,
    .trust-feature {
        will-change: transform;
        backface-visibility: hidden;
        transform: translateZ(0);
    }
    
    /* 移动端文本选择优化 */
    .hero-title,
    .section-header h2,
    .feature-content h3 {
        -webkit-user-select: text;
        user-select: text;
    }
}

/* Loading and Animation States */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

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

.crypto-item.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Focus States for Accessibility */
.btn:focus,
.email-input:focus,
.nav-link:focus,
.tab-btn:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
        --background-secondary: #ffffff;
    }
}

/* 页面稳定性和性能优化 */
.main {
    margin-top: var(--header-height);
}

.main section {
    position: relative;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}