/* ========================================
   华川指纹浏览器 - 全新现代设计
   ======================================== */

/* CSS 变量 - 现代配色方案 */
:root {
    /* 主色调 - 蓝紫渐变 */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    
    /* 辅助色 */
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-orange: #f97316;
    --accent-yellow: #f59e0b;
    
    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    /* 文字色 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    
    /* 边框 */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    
    /* 阴影 */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);
    --shadow-glow-lg: 0 0 60px rgba(59, 130, 246, 0.4);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ========================================
   动态背景
   ======================================== */
.animated-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float-orb 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #dbeafe 0%, #c7d2fe 100%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #f3e8ff 0%, #e0e7ff 100%);
    bottom: -150px;
    left: -150px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #fce7f3 0%, #fce7f3 100%);
    top: 40%;
    left: 20%;
    opacity: 0.3;
    animation-delay: -10s;
}

.orb-4 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #d1fae5 0%, #ccfbf1 100%);
    top: 60%;
    right: 10%;
    opacity: 0.25;
    animation-delay: -15s;
}

@keyframes float-orb {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(20px, 30px) scale(1.02);
    }
}

.mesh-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--border-medium);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
    padding: 10px 16px;
}

.btn-text:hover {
    color: var(--text-primary);
    background: var(--gray-100);
}

.btn-white {
    background: white;
    color: var(--primary-600);
    box-shadow: var(--shadow-lg);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-large {
    padding: 14px 28px;
    font-size: 15px;
}

.btn-large svg {
    width: 20px;
    height: 20px;
}

.btn-shine {
    position: relative;
    overflow: hidden;
}

.btn-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

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

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: all var(--transition);
}

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

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border-radius: var(--radius);
}

.logo-icon svg {
    width: 26px;
    height: 26px;
}

.logo-icon .logo-img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: var(--radius);
}

.brand-text-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2px;
    justify-content: center;
}

.brand-text {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.brand-url {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: 0.2px;
}

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

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-actions .btn-secondary {
    background: transparent;
    border: 1.5px solid var(--primary-500);
    color: var(--primary-600);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.nav-actions .btn-secondary svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.nav-actions .btn-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-600);
    color: var(--primary-700);
}

.nav-actions .btn-primary.btn-download-nav {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    border: none;
    color: white;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
    transition: all 0.3s ease;
}

.nav-actions .btn-primary.btn-download-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary-50) 0%, #f0fdf4 100%);
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-700);
    margin-bottom: 28px;
}

.badge-pulse {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple) 50%, var(--accent-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
}

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

.stat-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    border-radius: var(--radius);
    color: var(--primary-600);
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

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

.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* Hero 视觉区域 */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.browser-mockup {
    position: relative;
    width: 100%;
    max-width: 520px;
}

.browser-frame {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: 
        0 25px 60px -15px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.browser-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-50) 100%);
    border-bottom: 1px solid var(--border-light);
}

.window-controls {
    display: flex;
    gap: 8px;
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control.close { background: #ef4444; }
.control.minimize { background: #f59e0b; }
.control.maximize { background: #10b981; }

.address-bar {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: white;
    border-radius: var(--radius-full);
    font-size: 13px;
    color: var(--text-tertiary);
    box-shadow: var(--shadow-sm);
}

.lock-icon {
    width: 14px;
    height: 14px;
    color: var(--accent-green);
}

.browser-content {
    padding: 20px;
}

.env-cards {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.env-card {
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    transition: all var(--transition);
}

.env-card:hover {
    background: white;
    border-color: var(--primary-200);
    box-shadow: var(--shadow-md);
}

.env-card.active {
    background: linear-gradient(135deg, var(--primary-50) 0%, #eff6ff 100%);
    border-color: var(--primary-300);
}

.env-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.env-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.env-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

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

.env-tags .tag {
    font-size: 12px;
    padding: 4px 10px;
    background: white;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.env-tags .ip-tag {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    color: var(--primary-700);
    border-color: var(--primary-200);
}

.env-fingerprint {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.fp-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fp-label {
    font-size: 11px;
    color: var(--text-tertiary);
}

.fp-value {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-green);
}

/* 浮动元素 */
.floating-elements {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: float-card 6s ease-in-out infinite;
}

.float-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    border-radius: var(--radius);
    color: var(--primary-600);
}

.float-icon svg {
    width: 20px;
    height: 20px;
}

.float-text {
    display: flex;
    flex-direction: column;
}

.float-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.float-desc {
    font-size: 12px;
    color: var(--text-tertiary);
}

.card-1 {
    top: 10%;
    right: -40px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 25%;
    left: -50px;
    animation-delay: -2s;
}

.card-3 {
    bottom: 5%;
    right: 10%;
    animation-delay: -4s;
}

@keyframes float-card {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
}

/* ========================================
   通用区域标题
   ======================================== */
.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 72px;
}

.section-tag {
    display: inline-block;
    padding: 8px 18px;
    background: linear-gradient(135deg, var(--primary-50) 0%, #f3e8ff 100%);
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-600);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   核心功能区域
   ======================================== */
.features-section {
    padding: 120px 0;
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    position: relative;
    padding: 32px;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: all var(--transition-slow);
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.feature-highlight {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background: linear-gradient(135deg, white 0%, var(--primary-50) 100%);
}

.feature-bg-icon {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    color: var(--primary-200);
    opacity: 0.5;
}

.feature-icon-wrap {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    transition: transform var(--transition-bounce);
}

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

.feature-icon-wrap svg {
    display: block;
    flex-shrink: 0;
}

.feature-icon-wrap.blue {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
}

.feature-icon-wrap.purple {
    background: linear-gradient(135deg, #f3e8ff 0%, #faf5ff 100%);
}

.feature-icon-wrap.green {
    background: linear-gradient(135deg, #d1fae5 0%, #f0fdf4 100%);
}

.feature-icon-wrap.orange {
    background: linear-gradient(135deg, #ffedd5 0%, #fff7ed 100%);
}

.feature-icon-wrap.pink {
    background: linear-gradient(135deg, #fce7f3 0%, #fdf2f8 100%);
}

.feature-icon-wrap.cyan {
    background: linear-gradient(135deg, #cffafe 0%, #ecfeff 100%);
}

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

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

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}

.feature-tags .tag {
    padding: 6px 12px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* 安全流程可视化 */
.security-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 32px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.step-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: transform var(--transition-bounce);
}

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

.step-icon svg {
    display: block;
}

.step-icon.cloud {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
}

.step-icon.lock {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

.step-icon.device {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
}

.step-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.flow-arrow {
    color: var(--primary-300);
}

.flow-arrow svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   适用场景区域
   ======================================== */
.scenarios-section {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, white 100%);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.scenario-card {
    padding: 40px 28px;
    background: white;
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-slow);
    border: 1px solid var(--border-light);
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.scenario-icon-wrap {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    transition: transform var(--transition-bounce);
}

.scenario-card:hover .scenario-icon-wrap {
    transform: scale(1.1);
}

.scenario-icon-wrap svg {
    width: 100%;
    height: 100%;
}

.scenario-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.scenario-desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.scenario-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.scenario-tags span {
    padding: 5px 12px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ========================================
   用户评价区域
   ======================================== */
.testimonials-section {
    padding: 120px 0;
    background: var(--bg-primary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    padding: 36px;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: all var(--transition-slow);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    border-color: var(--primary-200);
}

.testimonial-rating {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
}

.testimonial-rating svg {
    width: 20px;
    height: 20px;
    color: #fbbf24;
    fill: #fbbf24;
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 14px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple) 100%);
    border-radius: 50%;
    font-size: 18px;
    font-weight: 700;
    color: white;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.author-title {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* ========================================
   下载中心
   ======================================== */
.download-section {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, white 100%);
}

.download-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.download-card {
    position: relative;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    text-align: center;
    transition: all var(--transition-slow);
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.download-card.featured {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--primary-100);
}

.download-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple) 100%);
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: var(--radius-full);
}

.download-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-icon img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.download-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.download-version {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

.download-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.info-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.info-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn-download {
    width: 100%;
    justify-content: center;
}

/* 系统要求 */
.requirements-section {
    margin-bottom: 60px;
    margin-top: 48px;
}

.requirements-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 40px;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.requirement-card {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.requirement-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.requirement-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.requirement-card li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.requirement-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--primary-400);
    border-radius: 50%;
}

/* 其他下载选项 */
.download-extra {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border-light);
}

.extra-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.extra-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.extra-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

.extra-link:hover {
    color: var(--primary-600);
}

.extra-link svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   价格方案
   ======================================== */
.pricing-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.pricing-section .section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.pricing-card {
    position: relative;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    transition: all var(--transition-slow);
}

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

.pricing-card.featured {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--primary-100);
    transform: scale(1.02);
}

.pricing-card.featured:hover {
    transform: scale(1.02) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple) 100%);
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-full);
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-light);
}

.pricing-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.pricing-price .currency {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.pricing-price .amount {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.pricing-price .period {
    font-size: 16px;
    color: var(--text-tertiary);
}

.pricing-features {
    margin-bottom: 32px;
}

.pricing-features .feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

.pricing-features .feature-item:last-child {
    border-bottom: none;
}

.pricing-features .feature-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.pricing-features .feature-item:not(.disabled) svg {
    color: var(--accent-green);
}

.pricing-features .feature-item.disabled {
    color: var(--text-tertiary);
}

.pricing-features .feature-item.disabled svg {
    color: var(--gray-400);
}

.pricing-features .feature-item strong {
    color: var(--primary-600);
    font-weight: 600;
}

.btn-pricing {
    width: 100%;
    justify-content: center;
}

/* 企业定制 */
.pricing-enterprise {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
    border-radius: var(--radius-xl);
    padding: 48px;
    color: white;
}

.enterprise-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.enterprise-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.enterprise-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.enterprise-text {
    flex: 1;
}

.enterprise-text h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.enterprise-text p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
}

.pricing-enterprise .btn-primary {
    background: white;
    color: var(--primary-600);
    flex-shrink: 0;
}

.pricing-enterprise .btn-primary:hover {
    background: var(--gray-100);
}

/* ========================================
   订阅弹窗
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    padding: 48px;
    max-width: 480px;
    width: 90%;
    text-align: center;
    transform: scale(0.9) translateY(20px);
    transition: all var(--transition-slow);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition);
}

.modal-close:hover {
    background: var(--border-light);
}

.modal-close svg {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

.modal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
}

.modal-icon svg {
    width: 100%;
    height: 100%;
}

.modal-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.modal-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
}

.modal-steps {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 32px;
    text-align: left;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
}

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

.step-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-500);
    color: white;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.step-text {
    font-size: 15px;
    color: var(--text-secondary);
}

/* ========================================
   认证弹窗
   ======================================== */
.auth-modal-content {
    max-width: 420px;
    padding: 40px;
}

.auth-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--border-light);
}

.auth-tab {
    flex: 1;
    padding: 12px 24px;
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}

.auth-tab.active {
    color: var(--primary-600);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-600);
}

.auth-tab:hover:not(.active) {
    color: var(--text-secondary);
}

.auth-form.hidden {
    display: none;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius);
    background: white;
    transition: all var(--transition);
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-error {
    min-height: 20px;
    font-size: 14px;
    color: #ef4444;
    margin-bottom: 16px;
    text-align: center;
}

.form-success {
    min-height: 20px;
    font-size: 14px;
    color: #10b981;
    margin-bottom: 16px;
    text-align: center;
    display: none;
}

.form-success.show {
    display: block;
}

.verification-input-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn-send-code {
    white-space: nowrap;
    padding: 12px 16px;
    font-size: 14px;
    min-width: 100px;
}

.btn-send-code:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-auth {
    width: 100%;
    justify-content: center;
}

/* 找回密码表单样式 */
.form-options {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 16px;
}

.forgot-password-link {
    font-size: 14px;
    color: var(--primary-500);
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-password-link:hover {
    color: var(--primary-600);
    text-decoration: underline;
}

.form-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 24px;
    position: relative;
}

.btn-back {
    position: absolute;
    left: 0;
    top: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    transition: color 0.2s;
}

.btn-back:hover {
    color: var(--primary-500);
}

.btn-back svg {
    width: 16px;
    height: 16px;
}

.form-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* ========================================
   用户中心
   ======================================== */
.user-center-content {
    max-width: 440px;
    padding: 40px;
}

.user-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.user-avatar {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-avatar svg {
    width: 32px;
    height: 32px;
    color: white;
}

.user-info {
    flex: 1;
    text-align: center;
}

.user-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    text-align: center;
}

.user-email {
    font-size: 14px;
    color: var(--text-tertiary);
    text-align: center;
}

.user-plan-card {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.plan-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.plan-badge {
    background: var(--primary-500);
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

.plan-status {
    font-size: 13px;
    font-weight: 500;
    color: #10b981;
}

.plan-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.plan-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.plan-expire {
    font-size: 13px;
    color: var(--text-tertiary);
    padding-top: 12px;
    border-top: 1px dashed var(--primary-200);
}

.user-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.stat-box {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-box .stat-number {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-600);
    margin-bottom: 4px;
}

.stat-box .stat-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.user-actions {
    display: flex;
    gap: 12px;
}

.user-actions .btn {
    flex: 1;
    justify-content: center;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--gray-900);
    color: white;
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 80px;
    margin-bottom: 64px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.footer-brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    justify-content: center;
}

.footer-brand-text span {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, white 0%, var(--primary-300) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.footer-brand-url {
    font-size: 13px;
    color: var(--gray-400);
    font-weight: 400;
    letter-spacing: 0.2px;
}

.footer-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--gray-400);
}

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

.footer-column h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 24px;
    color: white;
    letter-spacing: 0.02em;
}

.footer-column ul li {
    margin-bottom: 14px;
}

.footer-column ul li a {
    font-size: 14px;
    color: var(--gray-400);
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer-column ul li a:hover {
    color: white;
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: var(--gray-500);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 60px;
    }
    
    .hero-content {
        max-width: 100%;
        order: 1;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        order: 0;
    }
    
    .browser-mockup {
        max-width: 480px;
    }
    
    .floating-elements {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-highlight {
        grid-column: span 2;
    }
    
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-brand {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-highlight {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .feature-visual {
        order: -1;
    }
    
    .security-flow {
        flex-direction: column;
        gap: 16px;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-title {
        font-size: 32px;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    /* 价格方案手机版 */
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
        margin: 0 auto;
    }
    
    .pricing-card {
        padding: 24px;
    }
    
    .pricing-features li {
        font-size: 14px;
    }
    
    /* CTA区域手机版 */
    .pricing-enterprise {
        padding: 24px;
        margin-top: 32px;
    }
    
    .enterprise-content {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    
    .enterprise-icon {
        margin: 0 auto;
        width: 56px;
        height: 56px;
    }
    
    .enterprise-text h3 {
        font-size: 22px;
    }
    
    .enterprise-text p {
        font-size: 14px;
    }
    
    /* 下载中心手机版 */
    .download-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
        margin: 0 auto;
    }
    
    .download-card {
        padding: 24px;
    }
    
    .download-info {
        font-size: 13px;
    }
    
    /* 系统要求手机版 */
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .requirement-card {
        padding: 20px;
    }
    
    .requirement-card ul li {
        font-size: 14px;
    }
}

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

.animate-in {
    opacity: 0;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.4s; }

/* 滚动显示动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 悬停效果 */
.hover-lift {
    transition: transform var(--transition), box-shadow var(--transition);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* 渐变边框效果 */
.gradient-border {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--primary-400), var(--accent-purple), var(--accent-pink));
    border-radius: calc(var(--radius-xl) + 2px);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition);
}

.gradient-border:hover::before {
    opacity: 1;
}

/* ========================================
   禁止水平滚动
   ======================================== */
html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

/* ========================================
   手机版导航栏优化
   ======================================== */

/* 超小屏幕优化 (480px 以下) */
@media (max-width: 480px) {
    .nav-container {
        padding: 0 8px;
    }
    
    .logo {
        gap: 4px;
    }
    
    .logo-icon {
        width: 26px;
        height: 26px;
    }
    
    .logo-icon svg {
        width: 14px;
        height: 14px;
    }
    
    .logo-text {
        font-size: 13px;
    }
    
    .nav-actions {
        gap: 4px;
    }
    
    .nav-actions .btn {
        padding: 5px 8px;
        font-size: 12px;
        white-space: nowrap;
    }
    
    .nav-actions .btn-secondary {
        padding: 5px 8px;
        font-size: 12px;
    }
    
    .nav-actions .btn-primary.btn-download-nav {
        padding: 5px 8px;
    }
    
    .nav-actions .btn-primary.btn-download-nav svg {
        width: 14px;
        height: 14px;
    }
}

/* 极小屏幕优化 (360px 以下) */
@media (max-width: 360px) {
    .nav-container {
        padding: 0 8px;
    }
    
    .logo-text {
        font-size: 13px;
    }
    
    .nav-actions .btn {
        padding: 5px 8px;
        font-size: 12px;
    }
    
    .nav-actions .btn-secondary {
        padding: 5px 8px;
        font-size: 12px;
    }
}