/* 全局样式 */
:root {
    --primary-color: #3a86ff;
    --secondary-color: #8338ec;
    --accent-color: #ff006e;
    --text-color: #2b2d42;
    --light-text: #8d99ae;
    --bg-color: #ffffff;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
    --border-radius: 8px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--bg-color);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.hero .container {
    max-width: 1200px;
    margin: 0 auto;
    background: url(../images/image.png);
}

section {
    padding: 80px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

.section-header p {
    color: var(--light-text);
    font-size: 1.1rem;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(58, 134, 255, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(58, 134, 255, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background-color: transparent;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    backdrop-filter: blur(10px);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo span {
    color: var(--primary-color);
}

.nav ul {
    display: flex;
}

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.nav ul li a:hover::after,
.nav ul li a.active::after {
    width: 100%;
}

.mobile-toggle {
    display: none;
    cursor: pointer;
}

.mobile-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* 英雄区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, rgba(248, 249, 250, 0.9), rgba(248, 249, 250, 0.7));
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/grid-pattern.svg') repeat;
    opacity: 0.1;
    z-index: 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 700px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    background: linear-gradient(90deg, var(--text-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-color);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s 0.2s forwards;
}

.hero-buttons {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s 0.4s forwards;
}

.hero-buttons .btn {
    margin-right: 15px;
    margin-bottom: 15px;
}

.hero-image {
    display: flex;
    justify-content: flex-end;
    position: relative;
}

.hero-image-container {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.hero-image img {
    width: 100%;
    animation: floating 6s ease-in-out infinite;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
}

/* 产品特点 */
.features {
    background-color: var(--bg-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

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

.feature-card:hover h3,
.feature-card:hover p {
    color: white;
}

.feature-card:hover .feature-icon {
    background-color: white;
    color: var(--primary-color);
}

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(58, 134, 255, 0.1), rgba(131, 56, 236, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition);
}

.feature-icon i {
    font-size: 28px;
    color: var(--primary-color);
    transition: var(--transition);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    transition: var(--transition);
}

.feature-card p {
    color: var(--light-text);
    transition: var(--transition);
}

/* SDK集成 */
.sdk {
    background-color: var(--light-bg);
    position: relative;
    overflow: hidden;
}

.sdk::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/circuit-pattern.svg') no-repeat right top;
    opacity: 0.05;
    z-index: 0;
}

.sdk-steps {
    position: relative;
    z-index: 1;
}

.sdk-step {
    display: flex;
    margin-bottom: 50px;
    position: relative;
}

.sdk-step:last-child {
    margin-bottom: 0;
}

.sdk-step::after {
    content: '';
    position: absolute;
    top: 70px;
    left: 25px;
    width: 2px;
    height: calc(100% - 50px);
    background: linear-gradient(to bottom, var(--primary-color), transparent);
    z-index: -1;
}

.sdk-step:last-child::after {
    display: none;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-right: 30px;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(58, 134, 255, 0.3);
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.step-content p {
    margin-bottom: 20px;
    color: var(--light-text);
}

.code-block {
    background-color: var(--dark-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.code-block pre {
    margin: 0;
    overflow-x: auto;
}

.code-block code {
    color: #f8f8f2;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    border-radius: 4px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.sdk-cta {
    text-align: center;
    margin-top: 50px;
}

.sdk-cta .btn {
    margin: 0 10px 10px;
}

/* 实时演示 */
.demo {
    background-color: var(--bg-color);
}

.demo-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.demo-tabs {
    display: flex;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.demo-tab {
    padding: 15px 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    background: none;
    border: none;
    outline: none;
    color: var(--light-text);
    position: relative;
}

.demo-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

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

.demo-tab.active::after {
    width: 100%;
}

.demo-content {
    padding: 30px;
}

.demo-panel {
    display: none;
}

.demo-panel.active {
    display: block;
}

.demo-input {
    margin-bottom: 30px;
}

.demo-input textarea {
    width: 100%;
    height: 120px;
    padding: 15px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    resize: none;
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 15px;
    transition: var(--transition);
}

.demo-input textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.2);
}

.analyze-btn {
    display: block;
    margin-left: auto;
}

.demo-result {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    min-height: 200px;
}

.result-placeholder {
    color: var(--light-text);
    text-align: center;
    padding: 60px 0;
}

.result-content {
    animation: fadeIn 0.5s;
}

.result-item {
    margin-bottom: 20px;
}

.result-item h4 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.sentiment-meter {
    height: 10px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 5px;
}

.sentiment-value {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 5px;
    transition: width 1s ease-in-out;
}

.sentiment-label {
    text-align: right;
    font-size: 0.9rem;
    color: var(--light-text);
}

.keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.keyword {
    background: linear-gradient(135deg, rgba(58, 134, 255, 0.1), rgba(131, 56, 236, 0.1));
    color: var(--primary-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.image-upload {
    border: 2px dashed rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    margin-bottom: 15px;
    transition: var(--transition);
    cursor: pointer;
}

.image-upload:hover {
    border-color: var(--primary-color);
}

.image-upload i {
    font-size: 2.5rem;
    color: var(--light-text);
    margin-bottom: 10px;
}

.image-upload span {
    display: block;
    color: var(--light-text);
}

.voice-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
}

.voice-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 15px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(58, 134, 255, 0.3);
}

.voice-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(58, 134, 255, 0.4);
}

.voice-status {
    color: var(--light-text);
}

.chat-container {
    max-height: 300px;
    overflow-y: auto;
}

/* 应用案例 */
.cases {
    background-color: var(--light-bg);
}

.cases-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.case-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.case-logo {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: var(--light-bg);
}

.case-logo img {
    max-height: 60px;
}

.case-logo .fas {
    font-size: 40px;
    color: var(--primary-color)
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.case-content p {
    color: var(--light-text);
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
}

.read-more i {
    margin-left: 5px;
    transition: var(--transition);
}

.read-more:hover i {
    transform: translateX(5px);
}

.cases-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.cases-nav button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: white;
    border: none;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.cases-nav button:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 联系我们 */
.contact {
    background-color: var(--bg-color);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.img-list {
    display: flex;
}
.img-list .img-item {
    text-align: center;
    margin-right: 20px;
    margin-top: 10px;
    width: 60px;
}
.img-list .img-item img{
    display: block;
    width: 60px;
    height: 60px;
    border-radius: 50%;
}

.info-item {
    display: flex;
    align-items: flex-start;
}

.info-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(58, 134, 255, 0.1), rgba(131, 56, 236, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.info-item h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.info-item p {
    color: var(--light-text);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.contact-form form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 0;
}

.form-group:nth-child(3),
.form-group:nth-child(4) {
    grid-column: span 2;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.2);
}

.contact-form textarea {
    height: 150px;
    resize: none;
}

.contact-form button {
    grid-column: 2;
    justify-self: end;
}

/* 页脚 */
.footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 50px;
}

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.footer-logo span {
    color: var(--primary-color);
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 50px;
}

.footer-link-group h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-link-group h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-link-group ul li {
    margin-bottom: 10px;
}

.footer-link-group ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
    display: block;
}

.footer-link-group ul li a:hover {
    color: white;
    transform: translateX(5px);
}

.footer-bottom {
    padding-top: 30px;
    /* border-top: 1px solid rgba(255, 255, 255, 0.1); */
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-bottom-links a:hover {
    color: white;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 99;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes floating {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}