* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: #6c5ce7;
}

.nav-logo i {
    margin-right: 0.5rem;
    color: #fdcb6e;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #6c5ce7;
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #fdcb6e, #6c5ce7);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #6c5ce7;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* 主页面 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-stars {
    position: absolute;
    width: 100%;
    height: 100%;
}

.star {
    position: absolute;
    font-size: 2rem;
    animation: float 6s ease-in-out infinite;
}

.star-1 { top: 20%; left: 10%; animation-delay: 0s; }
.star-2 { top: 60%; left: 80%; animation-delay: 1s; }
.star-3 { top: 30%; left: 70%; animation-delay: 2s; }
.star-4 { top: 80%; left: 20%; animation-delay: 3s; }
.star-5 { top: 10%; left: 90%; animation-delay: 4s; }

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 100vh;
}

.hero-content {
    color: white;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(45deg, #fdcb6e, #e17055, #6c5ce7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease-in-out infinite;
}

@keyframes gradient-shift {
    0%, 100% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(45deg); }
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.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: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(45deg, #fdcb6e, #e17055);
    color: white;
    box-shadow: 0 10px 30px rgba(253, 203, 110, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(253, 203, 110, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: #fdcb6e;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 手机模型 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    transform: rotate(-5deg);
    animation: phone-float 4s ease-in-out infinite;
}

@keyframes phone-float {
    0%, 100% { transform: rotate(-5deg) translateY(0px); }
    50% { transform: rotate(-5deg) translateY(-10px); }
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #ffffff, #f0f0f0);
    border-radius: 40px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #333;
    border-radius: 3px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.1);
}

.chat-interface {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.chat-header {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    color: white;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #fdcb6e;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

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

.chat-name {
    font-weight: 600;
    font-size: 1rem;
}

.chat-status {
    font-size: 0.8rem;
    opacity: 0.8;
}

.chat-messages {
    flex: 1;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: #f8f9fa;
}

.message {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
}

.message-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.ai-message {
    justify-content: flex-start;
}

.ai-message .message-avatar {
    background: #6c5ce7;
    color: white;
}

.user-message {
    justify-content: flex-end;
}

.user-message .message-avatar {
    background: #fdcb6e;
    color: white;
    order: 2;
}

.message-bubble {
    max-width: 70%;
    padding: 0.8rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.ai-message .message-bubble {
    background: white;
    color: #333;
    border-bottom-left-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.user-message .message-bubble {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    color: white;
    border-bottom-right-radius: 5px;
}

.chat-input {
    padding: 1rem;
    background: white;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-top: 1px solid #eee;
}

.input-field {
    flex: 1;
    padding: 0.8rem 1rem;
    background: #f8f9fa;
    border-radius: 25px;
    font-size: 0.9rem;
    color: #666;
}

.voice-btn {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
}

/* 功能特色 */
.features {
    padding: 6rem 0;
    background: white;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #6c5ce7, #fdcb6e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #6c5ce7, #fdcb6e, #e17055);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
    box-shadow: 0 10px 30px rgba(108, 92, 231, 0.3);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.feature-demo {
    margin-top: 1.5rem;
}

.demo-chat {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 1rem;
    text-align: left;
}

.demo-message, .demo-reply {
    padding: 0.5rem 1rem;
    border-radius: 15px;
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.demo-message {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    color: white;
    margin-left: 2rem;
    border-bottom-right-radius: 5px;
}

.demo-reply {
    background: white;
    color: #333;
    margin-right: 2rem;
    border-bottom-left-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.voice-wave {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3px;
    height: 40px;
}

.wave-bar {
    width: 4px;
    background: linear-gradient(45deg, #6c5ce7, #fdcb6e);
    border-radius: 2px;
    animation: wave 1.5s ease-in-out infinite;
}

.wave-bar:nth-child(1) { height: 20px; animation-delay: 0s; }
.wave-bar:nth-child(2) { height: 30px; animation-delay: 0.1s; }
.wave-bar:nth-child(3) { height: 40px; animation-delay: 0.2s; }
.wave-bar:nth-child(4) { height: 25px; animation-delay: 0.3s; }
.wave-bar:nth-child(5) { height: 15px; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.5); }
}

.role-avatars {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.role-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, #fdcb6e, #e17055);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    animation: bounce 2s ease-in-out infinite;
}

.role-avatar:nth-child(1) { animation-delay: 0s; }
.role-avatar:nth-child(2) { animation-delay: 0.2s; }
.role-avatar:nth-child(3) { animation-delay: 0.4s; }
.role-avatar:nth-child(4) { animation-delay: 0.6s; }

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 应用截图 */
.screenshots {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.screenshots-carousel {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.screenshot-item {
    opacity: 0.7;
    transform: scale(0.9);
    transition: all 0.3s ease;
}

.screenshot-item.active {
    opacity: 1;
    transform: scale(1);
}

.screenshot-mockup {
    width: 280px;
    height: 500px;
    background: white;
    border-radius: 25px;
    padding: 1.5rem;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    position: relative;
}

.mockup-content {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.mockup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
    margin-bottom: 1rem;
}

.header-title {
    font-weight: 600;
    color: #333;
}

.header-emoji {
    font-size: 1.2rem;
}

.mockup-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.chat-preview {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-bubble {
    padding: 1rem;
    border-radius: 15px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.chat-bubble.ai {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    color: white;
    margin-right: 2rem;
    border-bottom-left-radius: 5px;
}

.chat-bubble.user {
    background: #f8f9fa;
    color: #333;
    margin-left: 2rem;
    border-bottom-right-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.role-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.role-item {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    color: white;
    padding: 1rem;
    border-radius: 15px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.role-item:hover {
    transform: translateY(-5px);
}

.role-emoji {
    font-size: 1.5rem;
}

.role-name {
    font-size: 0.9rem;
    font-weight: 600;
}

.voice-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.voice-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.voice-option:hover {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    color: white;
}

.option-icon {
    font-size: 1.2rem;
}

.option-text {
    font-weight: 500;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ccc;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: linear-gradient(45deg, #6c5ce7, #fdcb6e);
    transform: scale(1.2);
}

/* 下载区域 */
.download {
    padding: 6rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.download-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.download-stars {
    position: absolute;
    width: 100%;
    height: 100%;
}

.download-star {
    position: absolute;
    font-size: 3rem;
    animation: twinkle 3s ease-in-out infinite;
}

.download-star:nth-child(1) {
    top: 20%;
    left: 15%;
    animation-delay: 0s;
}

.download-star:nth-child(2) {
    top: 60%;
    right: 20%;
    animation-delay: 1s;
}

.download-star:nth-child(3) {
    bottom: 30%;
    left: 70%;
    animation-delay: 2s;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

.download .section-header {
    color: white;
}

.download .section-title {
    background: linear-gradient(45deg, #fdcb6e, #e17055);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

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

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    min-width: 250px;
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    background: white;
}

.download-icon {
    width: 50px;
    height: 50px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.android .download-icon {
    background: linear-gradient(45deg, #4CAF50, #8BC34A);
}

.ios .download-icon {
    background: linear-gradient(45deg, #333, #666);
}

.download-text {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.download-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.2rem;
}

.download-platform {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
}

.download-arrow {
    font-size: 1.2rem;
    color: #6c5ce7;
    transition: all 0.3s ease;
}

.download-btn:hover .download-arrow {
    transform: translateX(5px);
}

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

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.info-item i {
    color: #fdcb6e;
    font-size: 1.2rem;
}

/* 联系我们 */
.contact {
    padding: 6rem 0;
    background: white;
}

.contact-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 25px;
    padding: 3rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.contact-info {
    flex: 1;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

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

.contact-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.3rem;
}

.contact-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
}

.contact-mascot {
    text-align: center;
}

.mascot {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: mascot-bounce 2s ease-in-out infinite;
}

@keyframes mascot-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.mascot-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: #6c5ce7;
}

/* 页脚 */
.footer {
    background: #2d3436;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
}

.footer-logo i {
    margin-right: 0.5rem;
    color: #fdcb6e;
    font-size: 1.8rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #b2bec3;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #fdcb6e;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #fdcb6e;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #636e72;
    color: #b2bec3;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .phone-frame {
        width: 250px;
        height: 500px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-carousel {
        flex-direction: column;
        align-items: center;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-info {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .contact-card {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .feature-card {
        padding: 2rem 1.5rem;
    }
    
    .phone-frame {
        width: 220px;
        height: 440px;
    }
}