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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-purple: #a855f7;
    --accent-green: #10b981;
    /* 黄色 - 导航栏选中状态 */
    --yellow: #FFD700;
    --yellow-dark: #FFA500;
    --yellow-bright: #FFED4E;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-dark: #1a1a1a;
    --bg-dark: #0a0a0a;
    --bg-darker: #000000;
    --bg-light: #f9fafb;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #000000;
    overflow-x: hidden;
}

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

/* Announcement Bar */
.announcement-bar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 12px 0;
    font-size: 14px;
    position: relative;
    z-index: 1000;
}

.announcement-link {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.announcement-link:hover {
    opacity: 0.8;
}

/* Navigation - Dark Theme */
.navbar {
    position: sticky;
    top: 0;
    background: #000000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
    background: rgba(0, 0, 0, 0.95);
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--yellow);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-item {
    background: none;
    border: none;
    font-size: 15px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width 0.3s ease;
}

.nav-item:hover {
    color: var(--accent-cyan);
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
    padding-bottom: 4px;
}

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

.nav-link.active {
    color: var(--yellow);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--yellow);
    border-radius: 2px;
}

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

.btn-primary {
    background: linear-gradient(135deg, #0066ff 0%, #0052cc 100%);
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-block;
    position: relative;
    box-shadow:
        0 4px 6px rgba(0, 102, 255, 0.3),
        0 8px 16px rgba(0, 102, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0052cc 0%, #0040a3 100%);
    transform: translateY(-3px) scale(1.02);
    box-shadow:
        0 6px 12px rgba(0, 102, 255, 0.4),
        0 12px 24px rgba(0, 102, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
}

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

.btn-primary:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow:
        0 2px 4px rgba(0, 102, 255, 0.3),
        0 4px 8px rgba(0, 102, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary.large {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
    display: inline-block;
    position: relative;
    box-shadow:
        0 4px 6px rgba(0, 0, 0, 0.2),
        0 8px 16px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.btn-secondary:hover {
    background: rgba(6, 182, 212, 0.15);
    border-color: var(--accent-cyan);
    transform: translateY(-3px) scale(1.02);
    box-shadow:
        0 6px 12px rgba(6, 182, 212, 0.3),
        0 12px 24px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 20px rgba(6, 182, 212, 0.3);
}

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

.btn-secondary:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow:
        0 2px 4px rgba(6, 182, 212, 0.2),
        0 4px 8px rgba(6, 182, 212, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-secondary.large {
    padding: 16px 32px;
    font-size: 16px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section - Webflow Style with Video */
.hero {
    padding: 0;
    background: #000000;
    position: relative;
    overflow: hidden;
    min-height: 700px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.hero-video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    opacity: 0.4;
    transform: scale(1.1);
    transition: opacity 0.5s ease, transform 0.5s ease;
    will-change: transform, opacity;
}

.hero-video.playing {
    opacity: 0.4;
}

.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.8) 100%);
    z-index: 1;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    margin-top: -50px;
    padding: 0px 24px 80px;
    position: relative;
    z-index: 2;
    min-height: 650px;
}

/* Books Fan Layout */
.books-fan-container {
    position: absolute;
    top: 58%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.5);
    width: 100%;
    max-width: 1200px;
    height: 400px;
    z-index: 1;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    pointer-events: none;
}

.books-fan-container .tom-img-container {
    width: 100%;
    height: 100%;
    display: block;
}

.book-item {
    position: absolute;
    width: 150px;
    aspect-ratio: 2 / 3;
    padding: 0;
    box-sizing: border-box;
    background: transparent;
    border: none;
    border-radius: 0;
    transform-origin: center bottom;
    transition: all 0.4s ease;
    z-index: 1;
    pointer-events: auto;
    cursor: pointer;
    box-shadow: none;
}

.book-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 0;
    filter: none;
    transition: none;
    background: transparent;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Fan arrangement - left to right with rotation, layered, perspective size variation */
.book-1 {
    left: 8%;
    transform: translateX(-50%) rotate(-32deg) scale(0.75);
    z-index: 1;
}

.book-2 {
    left: 18%;
    transform: translateX(-50%) rotate(-24deg) scale(0.85);
    z-index: 2;
}

.book-3 {
    left: 28%;
    transform: translateX(-50%) rotate(-16deg) scale(0.92);
    z-index: 3;
}

.book-4 {
    left: 38%;
    transform: translateX(-50%) rotate(-8deg) scale(0.96);
    z-index: 4;
}

.book-5 {
    left: 50%;
    transform: translateX(-50%) rotate(0deg) scale(1.0);
    z-index: 5;
}

.book-6 {
    left: 62%;
    transform: translateX(-50%) rotate(8deg) scale(0.96);
    z-index: 4;
}

.book-7 {
    left: 72%;
    transform: translateX(-50%) rotate(16deg) scale(0.92);
    z-index: 3;
}

.book-8 {
    left: 82%;
    transform: translateX(-50%) rotate(24deg) scale(0.85);
    z-index: 2;
}

/* Hover effect - maintain perspective scale */
.book-item:hover {
    z-index: 10 !important;
}

.book-1:hover {
    transform: translateX(-50%) translateY(-30px) rotate(-32deg) scale(0.9);
}

.book-2:hover {
    transform: translateX(-50%) translateY(-30px) rotate(-24deg) scale(1.0);
}

.book-3:hover {
    transform: translateX(-50%) translateY(-30px) rotate(-16deg) scale(1.08);
}

.book-4:hover {
    transform: translateX(-50%) translateY(-30px) rotate(-8deg) scale(1.12);
}

.book-5:hover {
    transform: translateX(-50%) translateY(-30px) rotate(0deg) scale(1.15);
}

.book-6:hover {
    transform: translateX(-50%) translateY(-30px) rotate(8deg) scale(1.12);
}

.book-7:hover {
    transform: translateX(-50%) translateY(-30px) rotate(16deg) scale(1.08);
}

.book-8:hover {
    transform: translateX(-50%) translateY(-30px) rotate(24deg) scale(1.0);
}

.book-item:hover img {
    filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.6));
}

.books-fan-container .book-item:hover img {
    filter: none;
}

/* Ensure hero content is above books - merge with existing styles */
.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    margin-bottom: 25px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 32px;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 22px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
    opacity: 0;
}

.hero-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 80px;
}

.hero-card {
    position: relative;
    height: 280px;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.8;
    border: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 8px 16px rgba(0, 0, 0, 0.3),
        0 16px 32px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.hero-card.active {
    opacity: 1;
    transform: scale(1.02);
    border-color: var(--accent-cyan);
    box-shadow:
        0 12px 24px rgba(6, 182, 212, 0.3),
        0 24px 48px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        0 0 30px rgba(6, 182, 212, 0.3);
}

/* 统一所有卡片的默认样式 */
.hero-card[data-option="optimize"] {
    opacity: 0.8;
    transform: none;
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow:
        0 8px 16px rgba(0, 0, 0, 0.3),
        0 16px 32px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.hero-card:hover {
    opacity: 1;
    transform: scale(1.02) translateY(-8px) rotateX(2deg);
    border-color: var(--accent-cyan);
    box-shadow:
        0 20px 40px rgba(6, 182, 212, 0.4),
        0 40px 80px rgba(6, 182, 212, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        0 0 50px rgba(6, 182, 212, 0.5);
}

.hero-card.active:hover {
    transform: scale(1.02) translateY(-8px) rotateX(2deg);
    box-shadow:
        0 20px 40px rgba(6, 182, 212, 0.4),
        0 40px 80px rgba(6, 182, 212, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        0 0 50px rgba(6, 182, 212, 0.5);
}

.hero-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: blur(8px) brightness(0.6);
    opacity: 0.8;
    transition: transform 0.5s ease, opacity 0.3s ease, filter 0.3s ease;
}

.hero-card.active .hero-card-bg {
    filter: blur(4px) brightness(0.75);
    opacity: 1;
    transform: scale(1.05);
}

.hero-card.active:hover .hero-card-bg {
    transform: scale(1.08);
    filter: blur(0px) brightness(1);
    opacity: 1;
}

.hero-card:hover .hero-card-bg {
    transform: scale(1.08);
    opacity: 1;
    filter: blur(0px) brightness(1);
}

.hero-card-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 32px;
}

.hero-card-title {
    font-size: 24px;
    font-weight: 600;
    color: #ffffff;
    line-height: 1.3;
    margin: 0;
    letter-spacing: -0.01em;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.hero-card-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    object-fit: contain;
    transition: opacity 0.3s ease, transform 0.3s ease;
    display: block;
    position: relative;
    z-index: 2;
}

.hero-card[data-option="manage"]:hover .hero-card-icon,
.hero-card[data-option="manage"]:hover .hero-card-title {
    opacity: 0;
    transform: translateY(-10px);
}


/* Features Section */
.features {
    padding: 40px 0;
    background: #000000;
}

.section-title {
    font-size: 56px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 64px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 24px;
    padding: 0;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: 2px solid var(--border-color);
    opacity: 0;
    transform: translateY(50px);
    box-shadow:
        0 8px 16px rgba(0, 0, 0, 0.2),
        0 16px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin: 24px 32px 16px;
    position: relative;
    z-index: 2;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0 32px 24px;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.feature-card-icon {
    width: 25%;
    aspect-ratio: 1;
    margin: 0 auto 24px;
    position: relative;
    z-index: 2;
    background: transparent;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.feature-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 12px;
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 24px;
    position: relative;
    z-index: 2;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.feature-card:hover {
    transform: translateY(-12px) rotateX(2deg);
    box-shadow:
        0 16px 32px rgba(6, 182, 212, 0.3),
        0 32px 64px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 40px rgba(6, 182, 212, 0.4);
    border-color: var(--accent-cyan);
}

.feature-card:hover::before {
    opacity: 1;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

/* Highlight Section */
.highlight-section {
    padding: 120px 0;
    background: #000000;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.highlight-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.highlight-intro {
    font-size: 22px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.highlight-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    padding: 12px 24px;
    border-radius: 12px;
    background: rgba(6, 182, 212, 0.1);
    border: 2px solid rgba(6, 182, 212, 0.3);
    position: relative;
    box-shadow:
        0 4px 8px rgba(6, 182, 212, 0.2),
        0 8px 16px rgba(6, 182, 212, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.highlight-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.highlight-link:hover {
    color: var(--accent-purple);
    gap: 12px;
    background: rgba(168, 85, 247, 0.15);
    border-color: var(--accent-purple);
    transform: translateY(-3px) scale(1.05);
    box-shadow:
        0 6px 12px rgba(168, 85, 247, 0.3),
        0 12px 24px rgba(168, 85, 247, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        0 0 20px rgba(168, 85, 247, 0.3);
}

.highlight-link:hover::before {
    opacity: 1;
}

.highlight-link:active {
    transform: translateY(-1px) scale(1.02);
    box-shadow:
        0 3px 6px rgba(168, 85, 247, 0.2),
        0 6px 12px rgba(168, 85, 247, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.link-arrow {
    transition: transform 0.3s ease;
}

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

/* Stats Section */
.stats {
    padding: 120px 0;
    background: #000000;
}

.stats-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    min-height: 400px;
}

.stat-slide {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.stat-slide.active {
    display: block;
}

.stat-content {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 48px;
    text-align: center;
    box-shadow:
        0 12px 24px rgba(0, 0, 0, 0.3),
        0 24px 48px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    border: 2px solid var(--border-color);
    backdrop-filter: blur(10px);
    position: relative;
}

.stat-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    opacity: 0.5;
    pointer-events: none;
}

.stat-number {
    font-size: 72px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.stat-label {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.stat-quote {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 32px;
    font-style: italic;
}

.stat-author {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-author strong {
    font-size: 16px;
    color: var(--text-primary);
}

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

.carousel-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.carousel-btn {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border: 2px solid var(--border-color);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    position: relative;
    box-shadow:
        0 4px 8px rgba(0, 0, 0, 0.2),
        0 8px 16px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.carousel-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 60%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.carousel-btn:hover {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #05a5c4 100%);
    color: var(--bg-dark);
    border-color: var(--accent-cyan);
    transform: translateY(-4px) scale(1.1);
    box-shadow:
        0 6px 12px rgba(6, 182, 212, 0.4),
        0 12px 24px rgba(6, 182, 212, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 20px rgba(6, 182, 212, 0.5);
}

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

.carousel-btn:active {
    transform: translateY(-2px) scale(1.05);
    box-shadow:
        0 3px 6px rgba(6, 182, 212, 0.3),
        0 6px 12px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.carousel-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Tabs Section */
.tabs-section {
    padding: 120px 0;
    background: #000000;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 64px;
    line-height: 1.6;
}

.tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    border-bottom: 2px solid var(--border-color);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid transparent;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    border-radius: 12px 12px 0 0;
    box-shadow:
        0 2px 4px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px 12px 0 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-cyan);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tab-btn.active {
    color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
    border-color: var(--accent-cyan);
    box-shadow:
        0 4px 8px rgba(6, 182, 212, 0.2),
        0 8px 16px rgba(6, 182, 212, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.tab-btn.active::before {
    opacity: 1;
}

.tab-btn.active::after {
    transform: scaleX(1);
}

.tab-btn:hover {
    color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
    box-shadow:
        0 4px 8px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.tab-btn:hover::before {
    opacity: 0.5;
}

.tab-content {
    display: none;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    animation: fadeInUp 0.5s ease-out;
}

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

.tab-content h3 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.tab-content p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Pricing Section */
.pricing-section {
    padding: 120px 0;
    background: #000000;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 64px;
    align-items: stretch;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 24px;
    padding: 40px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    backdrop-filter: blur(10px);
    box-shadow:
        0 8px 16px rgba(0, 0, 0, 0.2),
        0 16px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.pricing-card.featured {
    border-color: var(--accent-cyan);
    box-shadow:
        0 12px 24px rgba(6, 182, 212, 0.3),
        0 24px 48px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 40px rgba(6, 182, 212, 0.2);
}

.pricing-card.featured::before {
    opacity: 1;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

.pricing-card:hover {
    transform: translateY(-12px) rotateX(2deg);
    box-shadow:
        0 16px 32px rgba(6, 182, 212, 0.3),
        0 32px 64px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 40px rgba(6, 182, 212, 0.4);
    border-color: var(--accent-cyan);
}

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

.pricing-card.featured:hover {
    transform: translateY(-12px) rotateX(2deg);
    box-shadow:
        0 20px 40px rgba(6, 182, 212, 0.4),
        0 40px 80px rgba(6, 182, 212, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.25),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 60px rgba(6, 182, 212, 0.5);
}

.pricing-header {
    margin-bottom: 32px;
    text-align: center;
}

.pricing-header h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.pricing-badge {
    display: inline-block;
    background: var(--accent-cyan);
    color: var(--bg-dark);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-features ul {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features {
    flex: 1;
}

.pricing-features li {
    padding: 12px 0;
    font-size: 16px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

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

.feature-included {
    color: var(--accent-cyan);
}

.feature-excluded {
    color: var(--text-secondary);
    opacity: 0.5;
}

.pricing-btn {
    display: block;
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #05a5c4 100%);
    color: var(--bg-dark);
    text-align: center;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    box-shadow:
        0 4px 8px rgba(6, 182, 212, 0.3),
        0 8px 16px rgba(6, 182, 212, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.3);
    overflow: hidden;
    margin-top: auto;
}

.pricing-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.pricing-btn:hover {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #9333ea 100%);
    transform: translateY(-4px) scale(1.02);
    box-shadow:
        0 6px 12px rgba(168, 85, 247, 0.4),
        0 12px 24px rgba(168, 85, 247, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 20px rgba(168, 85, 247, 0.4);
}

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

.pricing-btn:active {
    transform: translateY(-2px) scale(0.98);
    box-shadow:
        0 3px 6px rgba(168, 85, 247, 0.3),
        0 6px 12px rgba(168, 85, 247, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.pricing-card.featured .pricing-btn {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #9333ea 100%);
    box-shadow:
        0 4px 8px rgba(168, 85, 247, 0.3),
        0 8px 16px rgba(168, 85, 247, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 20px rgba(168, 85, 247, 0.3);
}

.pricing-card.featured .pricing-btn:hover {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #05a5c4 100%);
    box-shadow:
        0 6px 12px rgba(6, 182, 212, 0.4),
        0 12px 24px rgba(6, 182, 212, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        0 0 20px rgba(6, 182, 212, 0.4);
}

/* CTA Section */
.cta-section {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    color: white;
    text-align: center;
}

.cta-section .section-title {
    color: white;
    margin-bottom: 24px;
}

.cta-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 48px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background: white;
    color: var(--bg-dark);
}

.cta-section .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
}

.cta-section .btn-secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.cta-section .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

/* Footer */
.footer {
    background: #000000;
    color: white;
    padding: 80px 0 32px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

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

.social-links {
    display: flex;
    gap: 24px;
}

.social-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-cyan);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    50% {
        transform: translate(30px, -30px) rotate(5deg);
    }
}

@keyframes floatCard {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

/* Scroll Animations */
@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-100px);
    }

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

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .hero-card {
        height: 250px;
    }

    .hero-title {
        font-size: 56px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-cards {
        grid-template-columns: 1fr;
    }

    .hero-card {
        height: 220px;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-description {
        font-size: 18px;
    }

    .hero-card-title {
        font-size: 20px;
    }

    .hero-video {
        opacity: 0.3;
    }

    .hero {
        min-height: 500px;
        padding: 60px 0 80px;
    }

    .hero-container {
        min-height: 450px;
    }

    .hero-content {
        margin-bottom: 40px;
    }

    .hero-cards {
        margin-top: 40px;
    }

    /* Books fan responsive */
    .books-fan-container {
        height: 280px;
        transform: translate(-50%, -50%) scale(1.2);
    }

    .book-item {
        width: 84px;
        aspect-ratio: 2 / 3;
    }

    .book-1 {
        left: 2%;
        transform: translateX(-50%) rotate(-30deg) scale(0.75);
    }

    .book-2 {
        left: 12%;
        transform: translateX(-50%) rotate(-22deg) scale(0.85);
    }

    .book-3 {
        left: 22%;
        transform: translateX(-50%) rotate(-14deg) scale(0.92);
    }

    .book-4 {
        left: 32%;
        transform: translateX(-50%) rotate(-6deg) scale(0.96);
    }

    .book-5 {
        left: 50%;
        transform: translateX(-50%) rotate(0deg) scale(1.0);
    }

    .book-6 {
        left: 68%;
        transform: translateX(-50%) rotate(6deg) scale(0.96);
    }

    .book-7 {
        left: 78%;
        transform: translateX(-50%) rotate(14deg) scale(0.92);
    }

    .book-8 {
        left: 88%;
        transform: translateX(-50%) rotate(22deg) scale(0.85);
    }

    .section-title {
        font-size: 36px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn-primary,
    .cta-buttons .btn-secondary {
        width: 100%;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* Performance Optimization */
* {
    will-change: auto;
}

.feature-card,
.floating-card,
.option-card {
    will-change: transform;
}

/* Image Placeholder Styles */
.image-placeholder {
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.placeholder-text {
    font-weight: 600;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.9);
}

.placeholder-size {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

.option-card:hover .image-placeholder,
.feature-card:hover .image-placeholder {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(168, 85, 247, 0.2) 100%);
}

/* Media Placeholder Info - 显示图片/视频名称和尺寸 */
.media-placeholder-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    padding: 8px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
    z-index: 10;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.media-name {
    font-weight: 600;
    color: #06b6d4;
}

.media-size {
    color: rgba(255, 255, 255, 0.7);
    font-family: monospace;
}

.feature-image-wrapper,
.ghost-content-image,
.example-image,
.trusted-item,
.hero-card,
.hero-video-wrapper {
    position: relative;
}

/* Customized Pricing Cards */
.pricing-card.card-guest {
    border-color: rgba(6, 182, 212, 0.3);
}

.pricing-card.card-guest .pricing-badge {
    background: var(--accent-cyan);
    color: var(--bg-dark);
}

.pricing-card.card-guest .pricing-btn {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #05a5c4 100%);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.pricing-card.card-guest:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.2);
}

.pricing-card.card-ordinary {
    border-color: rgba(16, 185, 129, 0.3);
}

.pricing-card.card-ordinary .pricing-badge {
    background: var(--accent-green);
    color: var(--bg-dark);
}

.pricing-card.card-ordinary .pricing-btn {
    background: linear-gradient(135deg, var(--accent-green) 0%, #059669 100%);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.pricing-card.card-ordinary:hover {
    border-color: var(--accent-green);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
}

.pricing-card.card-ordinary .feature-included {
    color: var(--accent-green);
}

.pricing-card.card-pro {
    border-color: rgba(168, 85, 247, 0.3);
}

.pricing-card.card-pro .pricing-badge {
    background: var(--accent-purple);
    color: white;
}

.pricing-card.card-pro .pricing-btn {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #7c3aed 100%);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

.pricing-card.card-pro:hover {
    border-color: var(--accent-purple);
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.2);
}

.pricing-card.card-pro .feature-included {
    color: var(--accent-purple);
}

/* Feature Card Icon Spacing */
.feature-card-icon {
    margin-top: 24px;
}