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

:root {
    --primary-gradient: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --tertiary-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-lighter: #fafbfc;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-white);
    overflow-x: hidden;
}

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

/* ===================================
   Sticky Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.app-name {
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-light);
}

.nav-link.active {
    color: #ff6b6b;
    transform: scale(1.1);
    font-weight: 600;
    background: transparent;
}

.nav-link.active::after {
    display: none;
}

/* 顶部显眼下载按钮 */
.nav-download-btn {
    padding: 10px 24px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    color: white;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    border-radius: 24px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.nav-download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #c44569 0%, #ff6b6b 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
}

.nav-download-btn:hover::before {
    opacity: 1;
}

/* 移动端汉堡菜单按钮 */
.hamburger {
    display: none;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 8px;
    transition: var(--transition);
    position: relative;
}

.hamburger:hover {
    background: var(--bg-light);
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 100%;
    height: 100%;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    z-index: 999;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-menu.active {
    max-height: 500px;
    overflow-y: auto;
}

.mobile-menu-list {
    list-style: none;
    padding: 16px 24px;
}

.mobile-menu-list li {
    border-bottom: 1px solid var(--bg-light);
}

.mobile-menu-list li:last-child {
    border-bottom: none;
}

.mobile-menu-link {
    display: block;
    padding: 16px 0;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
}

.mobile-menu-link:hover,
.mobile-menu-link:active {
    color: #ff6b6b;
}

.mobile-menu-link.active {
    color: #ff6b6b;
    font-weight: 600;
    transform: scale(1.05);
    transform-origin: left;
}

.mobile-download-btn {
    display: block;
    margin: 16px 24px;
    padding: 14px 24px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    color: white;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
    transition: var(--transition);
}

.mobile-download-btn:active {
    transform: scale(0.98);
}

/* ===================================
   Hero Section with Carousel
   =================================== */
.hero-section {
    margin-top: 72px;
    min-height: calc(100vh - 72px);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* Hero区星空背景容器 */
.hero-section .stars-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

/* Hero区星空背景渐变 */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at bottom, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 2;
}

.hero-carousel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.carousel-track {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Hero 背景图片 - 可以替换为实际图片路径 */
.hero-bg-1 {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    /* 替换为实际图片: background-image: url('images/hero-bg-1.jpg'); */
}

.hero-bg-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    /* 替换为实际图片: background-image: url('images/hero-bg-2.jpg'); */
}

.hero-bg-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    /* 替换为实际图片: background-image: url('images/hero-bg-3.jpg'); */
}

.hero-visual {
    position: absolute;
    left: 50%;
    top: 20%;
    transform: translateX(-50%);
    width: auto;
    height: auto;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.floating-chat {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.chat-bubble {
    font-size: 160px;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
    opacity: 0.85;
}

.ai-sparkle {
    position: absolute;
    top: -20px;
    right: -20px;
    font-size: 64px;
    animation: sparkle 2s ease-in-out infinite;
}

.floating-keyboard {
    font-size: 160px;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
    opacity: 0.85;
}

.floating-ai {
    font-size: 160px;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
    opacity: 0.85;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-30px);
    }
}

@keyframes sparkle {
    0%, 100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.2) rotate(180deg);
        opacity: 0.8;
    }
}

.carousel-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    width: 32px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.9);
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 80px;
}

.hero-text {
    flex: 0 0 auto;
    max-width: 600px;
    color: white;
}

.hero-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 16px;
    opacity: 0.95;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.hero-description {
    font-size: 18px;
    opacity: 0.85;
    line-height: 1.6;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex-shrink: 0;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 28px;
    background: white;
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
    min-width: 240px;
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1) 0%, rgba(238, 90, 111, 0.1) 50%, rgba(196, 69, 105, 0.1) 100%);
    opacity: 0;
    transition: var(--transition);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.download-btn:hover::before {
    opacity: 1;
}

.ios-btn {
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.ios-btn:hover {
    border-color: rgba(255, 107, 107, 0.5);
}

.android-btn {
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.android-btn:hover {
    border-color: rgba(79, 172, 254, 0.5);
}

.btn-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.btn-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===================================
   Section Common Styles
   =================================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

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

/* ===================================
   Features Section
   =================================== */
.features-section {
    background: var(--bg-lighter);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: white;
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    transition: var(--transition);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
    transition: var(--transition);
}

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

.feature-card:hover .feature-icon svg {
    filter: drop-shadow(0 8px 16px rgba(255, 107, 107, 0.3));
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* ===================================
   Tech Section
   =================================== */
.tech-section {
    background: white;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.tech-item {
    text-align: center;
}

.tech-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.tech-icon svg {
    width: 100%;
    height: 100%;
    transition: var(--transition);
}

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

.tech-item:hover .tech-icon svg {
    filter: drop-shadow(0 8px 16px rgba(255, 107, 107, 0.3));
}

.tech-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.tech-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===================================
   Persona Market Section
   =================================== */
.personas-section {
    background: var(--bg-lighter);
    position: relative;
    overflow: hidden;
}

.personas-carousel {
    position: relative;
    padding: 0 60px;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border: none;
    background: white;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
}

.carousel-btn:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-50%) scale(1.05);
}

.carousel-btn svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

.prev-btn {
    left: 0;
}

.next-btn {
    right: 0;
}

.personas-track-container {
    overflow: hidden;
    margin: 0 -16px;
}

.personas-track {
    display: flex;
    gap: 24px;
    padding: 8px 16px;
    transition: transform 0.4s ease;
}

.persona-card {
    flex: 0 0 250px;
    background: var(--bg-lighter);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}

.persona-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background: white;
    border-color: rgba(200, 200, 200, 0.6);
}

.persona-emoji {
    font-size: 48px;
    margin-bottom: 16px;
}

.persona-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.persona-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.persona-tag {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 12px;
}

/* ===================================
   Custom Persona Section
   =================================== */
.custom-section {
    background: var(--bg-lighter);
}

.custom-content {
    display: flex;
    align-items: center;
    gap: 80px;
}

.custom-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

.custom-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
}

.custom-card.floating {
    animation: float 6s ease-in-out infinite;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--bg-light);
}

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

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

.card-title {
    font-size: 18px;
    font-weight: 600;
}

.card-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.option-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.option-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.option-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

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

.tag {
    padding: 6px 14px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
}

.custom-text {
    flex: 1;
}

.custom-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.custom-feature {
    display: flex;
    gap: 16px;
}

.feature-icon-small {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

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

.feature-text h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===================================
   Testimonials Section
   =================================== */
.testimonials-section {
    background: var(--bg-lighter);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.testimonial-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    margin-bottom: 24px;
}

.testimonial-avatar svg {
    width: 100%;
    height: 100%;
}

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

.testimonial-author {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===================================
   Download Section
   =================================== */
.download-section {
    background: var(--primary-gradient);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 星空背景容器 */
.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at bottom, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* 星空画布 */
.stars-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* 星星样式 */
.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    opacity: 0;
    animation: twinkle var(--duration) ease-in-out infinite;
    animation-delay: var(--delay);
    box-shadow: 0 0 3px rgba(255, 255, 255, 0.8),
                0 0 6px rgba(255, 255, 255, 0.6),
                0 0 9px rgba(255, 255, 255, 0.4);
}

/* 流星效果 */
.shooting-star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 4px 2px rgba(255, 255, 255, 0.8);
    opacity: 0;
    animation: shoot var(--shoot-duration) linear infinite;
    animation-delay: var(--shoot-delay);
}

.shooting-star::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.8) 100%);
    transform-origin: right;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shoot {
    0% {
        opacity: 1;
        transform: translate(0, 0) rotate(-45deg);
    }
    70% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-300px, 300px) rotate(-45deg);
    }
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.download-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.download-subtitle {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 48px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.download-btn-large {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 32px;
    background: white;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    min-width: 200px;
}

.download-btn-large:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}

.btn-icon-large {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.btn-label-large {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: left;
}

.btn-title-large {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 32px 0 20px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

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

.footer-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.footer-app-name {
    font-size: 18px;
    font-weight: 600;
}

.footer-info {
    text-align: center;
}

.footer-text {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.8;
}

.footer-text .separator {
    margin: 0 12px;
    opacity: 0.4;
}

/* 备案链接样式 */
.beian-link {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    transition: color 0.3s ease;
}

.beian-link:hover {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
}

/* 企业微信二维码样式 */
.qrcode-trigger {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.qrcode-text {
    color: rgba(255, 255, 255, 0.65);
    transition: color 0.3s ease;
}

.qrcode-trigger:hover .qrcode-text {
    color: rgba(255, 255, 255, 0.9);
}

.qrcode-popup {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: white;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
    z-index: 1000;
    margin-bottom: 10px;
}

.qrcode-trigger:hover .qrcode-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.qrcode-image {
    display: block;
    width: 150px;
    height: 150px;
    object-fit: contain;
}

/* 二维码小箭头 */
.qrcode-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: white;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .hero-content {
        flex-direction: column;
        gap: 48px;
        text-align: center;
        justify-content: center;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-cta {
        align-items: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .custom-content {
        flex-direction: column;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-actions {
        gap: 12px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-download-btn {
        display: none;
    }
    
    .hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid,
    .tech-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .personas-carousel {
        padding: 0 40px;
    }
    
    .carousel-btn {
        width: 36px;
        height: 36px;
    }
    
    .carousel-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .download-title {
        font-size: 32px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-text {
        font-size: 11px;
        line-height: 2;
    }
    
    .footer-text .separator {
        display: block;
        margin: 4px 0;
        opacity: 0;
    }
    
    /* 移动端二维码弹窗调整 */
    .qrcode-popup {
        bottom: auto;
        top: 100%;
        margin-bottom: 0;
        margin-top: 10px;
    }
    
    .qrcode-popup::after {
        top: auto;
        bottom: 100%;
        border-top-color: transparent;
        border-bottom-color: white;
    }
    
    .qrcode-image {
        width: 120px;
        height: 120px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .download-btn {
        min-width: 200px;
    }
}