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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Color Variables */
:root {
    --primary-purple: #8B5CF6;
    --secondary-purple: #A78BFA;
    --light-purple: #C4B5FD;
    --primary-green: #10B981;
    --secondary-green: #34D399;
    --light-green: #6EE7B7;
    --dark-bg: #1F2937;
    --light-bg: #F9FAFB;
    --white: #FFFFFF;
    --gray: #6B7280;
    --gradient-purple: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 100%);
    --gradient-green: linear-gradient(135deg, #10B981 0%, #34D399 100%);
    --gradient-mixed: linear-gradient(135deg, #8B5CF6 0%, #10B981 100%);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(31, 41, 55, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.nav-icon {
    width: 42px;
    height: 42px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.nav-logo:hover .nav-icon {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-green);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--white);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: var(--gradient-mixed);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="cards" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse"><rect width="20" height="20" fill="none"/><path d="M2,2 L18,2 L18,18 L2,18 Z" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23cards)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-logo {
    width: 320px;
    height: 200px;
    object-fit: contain;
    margin-bottom: 0.2rem;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    transition: all 0.3s ease;
}

.hero-logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.4));
}

.gradient-text {
    background: linear-gradient(45deg, var(--primary-green), var(--light-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary-green);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--secondary-green);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--dark-bg);
    transform: translateY(-2px);
}

/* Card Stack Animation */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.card-stack {
    position: relative;
    width: 200px;
    height: 300px;
    pointer-events: none;
}

.card {
    position: absolute;
    width: 140px;
    height: 200px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 2px solid #e0e0e0;
    overflow: hidden;
    animation: float 3s ease-in-out infinite;
    pointer-events: none;
}

.card-content {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 12px;
    box-sizing: border-box;
}

.card-corner {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-weight: bold;
    font-size: 16px;
    line-height: 1;
}

.card-corner.top-left {
    align-self: flex-start;
}

.card-corner.bottom-right {
    align-self: flex-end;
    transform: rotate(180deg);
}

.card-value {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.card-suit {
    font-size: 20px;
    line-height: 1;
}

.card-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-suit-large {
    font-size: 56px;
    line-height: 1;
}

/* 花色和数字颜色 */
.card-1 .card-suit,
.card-1 .card-suit-large,
.card-1 .card-value {
    color: #d32f2f !important;
    /* 红桃 - 红色 */
}

.card-2 .card-suit,
.card-2 .card-suit-large,
.card-2 .card-value {
    color: #000 !important;
    /* 黑桃 - 黑色 */
}

.card-3 .card-suit,
.card-3 .card-suit-large,
.card-3 .card-value {
    color: #d32f2f !important;
    /* 方块 - 红色 */
}

.card-4 .card-suit,
.card-4 .card-suit-large,
.card-4 .card-value {
    color: #000 !important;
    /* 梅花 - 黑色 */
}

.card-1 {
    top: 0;
    left: 0;
    animation-delay: 0s;
}

.card-2 {
    top: 10px;
    left: 10px;
    animation-delay: 0.5s;
}

.card-3 {
    top: 20px;
    left: 20px;
    animation-delay: 1s;
}

.card-4 {
    top: 30px;
    left: 30px;
    animation-delay: 1.5s;
}

@keyframes float {

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

    50% {
        transform: translateY(-10px);
    }
}

/* Carousel Section */
.carousel-section {
    padding: 0;
    background: var(--light-bg);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--dark-bg);
}

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

.carousel-wrapper {
    display: flex;
    height: 100%;
    width: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    flex: 0 0 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    text-align: center;
    z-index: 10;
    max-width: 800px;
    width: 90%;
}

.slide-content h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.7);
}

.slide-content p {
    font-size: 1.4rem;
    opacity: 0.95;
    line-height: 1.6;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
}

.carousel-controls {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.carousel-dots {
    display: flex;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.7);
    padding: 1rem 1.5rem;
    border-radius: 30px;
    backdrop-filter: blur(10px);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.dot.active {
    background: var(--primary-green);
    transform: scale(1.2);
}

.dot:hover {
    background: var(--primary-green);
    transform: scale(1.1);
}

.carousel-nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    pointer-events: auto;
}

.nav-btn.prev {
    left: 2rem;
}

.nav-btn.next {
    right: 2rem;
}

.nav-btn:hover {
    background: var(--primary-green);
    transform: translateY(-50%) scale(1.1);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: translateY(-50%);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(139, 92, 246, 0.2);
    border-color: var(--primary-purple);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-purple);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--white);
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-bg);
}

.feature-card p {
    color: var(--gray);
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 5rem 0;
    background: var(--gradient-mixed);
    color: var(--white);
}

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

.download-description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--white);
    color: var(--dark-bg);
    padding: 1rem 2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    min-width: 200px;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.download-btn i {
    font-size: 2rem;
}

.download-btn .download-icon {
    width: 2rem;
    height: 2rem;
    object-fit: contain;
}

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

.btn-label {
    font-size: 0.8rem;
    opacity: 0.7;
}

.btn-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.info-item i {
    color: var(--primary-green);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-green);
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-green);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-icon {
    width: 64px;
    height: 64px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.footer-logo:hover .footer-icon {
    transform: scale(1.1);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--primary-purple);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-green);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray);
    color: var(--gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(31, 41, 55, 0.98);
        flex-direction: column;
        padding: 1rem;
        backdrop-filter: blur(10px);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        margin: 0.5rem 0;
    }

    .nav-menu a {
        display: block;
        padding: 0.75rem 1rem;
        border-radius: 8px;
        transition: background-color 0.3s ease;
    }

    .nav-menu a:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .hamburger {
        display: flex;
    }

    .nav-icon {
        width: 36px;
        height: 36px;
    }

    .footer-icon {
        width: 40px;
        height: 40px;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-logo {
        width: 80px;
        height: 80px;
        margin-bottom: 0.1rem;
    }

    .card {
        width: 100px;
        height: 140px;
    }

    .card-value {
        font-size: 14px;
    }

    .card-suit {
        font-size: 16px;
    }

    .card-suit-large {
        font-size: 40px;
    }

    .carousel-section {
        height: 100vh;
    }

    .slide-content h2 {
        font-size: 2.5rem;
    }

    .slide-content p {
        font-size: 1.2rem;
    }

    .nav-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .nav-btn.prev {
        left: 1.5rem;
    }

    .nav-btn.next {
        right: 1.5rem;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-info {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .carousel-section {
        height: 100vh;
    }

    .card {
        width: 80px;
        height: 120px;
    }

    .card-value {
        font-size: 12px;
    }

    .card-suit {
        font-size: 14px;
    }

    .card-suit-large {
        font-size: 32px;
    }

    .slide-content h2 {
        font-size: 2rem;
    }

    .slide-content p {
        font-size: 1rem;
    }

    .hero-logo {
        width: 60px;
        height: 60px;
        margin-bottom: 0.05rem;
    }

    .nav-btn {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }

    .nav-btn.prev {
        left: 1rem;
    }

    .nav-btn.next {
        right: 1rem;
    }

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

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

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: var(--light-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-bg);
}

.contact-info p {
    color: var(--gray);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    color: var(--primary-purple);
    font-size: 1.2rem;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-bg);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-purple);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--primary-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive Design for Contact */
@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-form {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .contact {
        padding: 3rem 0;
    }

    .contact-content {
        gap: 1.5rem;
    }

    .contact-form {
        padding: 1rem;
    }
}