/* 全局重置和变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6c63ff;
    --primary-dark: #5a52d5;
    --secondary: #ff6584;
    --accent: #00d2ff;
    --bg: #f8f9fe;
    --bg-card: #ffffff;
    --text: #2d3436;
    --text-light: #636e72;
    --shadow: 0 8px 32px rgba(108, 99, 255, 0.1);
    --radius: 16px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg: #0f0f1a;
    --bg-card: #1a1a2e;
    --text: #e4e4f0;
    --text-light: #a0a0b8;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--secondary);
}

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

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

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(108, 99, 255, 0.1);
    transition: var(--transition);
}

[data-theme="dark"] header {
    background: rgba(15, 15, 26, 0.85);
    border-bottom-color: rgba(108, 99, 255, 0.2);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav {
    display: flex;
    gap: 6px;
}

nav a {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    color: var(--text);
}

nav a:hover {
    background: rgba(108, 99, 255, 0.08);
    color: var(--primary);
}

nav a.active {
    color: var(--primary);
    background: rgba(108, 99, 255, 0.12);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text);
    border-radius: 3px;
    transition: var(--transition);
}

.dark-toggle {
    background: rgba(108, 99, 255, 0.1);
    border: 1px solid rgba(108, 99, 255, 0.2);
    color: var(--text);
    padding: 8px 14px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    margin-left: 12px;
}

.dark-toggle:hover {
    background: var(--primary);
    color: #fff;
}

/* Hero Banner */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    background: linear-gradient(135deg, #f0f0ff 0%, #e8f4fd 50%, #fff0f3 100%);
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #1f1f35 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 80px 0;
}

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 14px 36px;
    border-radius: 30px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 12px 32px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-visual svg {
    width: 100%;
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(108, 99, 255, 0.15));
    animation: float 6s ease-in-out infinite;
}

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

/* Sections */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(108, 99, 255, 0.05);
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(108, 99, 255, 0.15);
}

.card-icon {
    margin-bottom: 16px;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* Brand Story */
.brand-story {
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.03), rgba(0, 210, 255, 0.03));
    border-radius: var(--radius);
    padding: 50px;
    margin-top: 40px;
}

[data-theme="dark"] .brand-story {
    background: rgba(108, 99, 255, 0.05);
}

.timeline {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 30px;
    justify-content: center;
}

.timeline-item {
    flex: 1;
    min-width: 180px;
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.timeline-year {
    font-weight: 800;
    color: var(--primary);
    font-size: 1.2rem;
}

/* Products */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(108, 99, 255, 0.05);
}

.product-card:hover {
    transform: translateY(-4px);
}

.product-card svg {
    margin: 0 auto 16px;
}

.product-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.product-card p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Services */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.service-item {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--primary);
}

.service-item h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.service-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Cases */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

.case-card:hover {
    transform: translateY(-4px);
}

.case-body {
    padding: 24px;
}

.case-body h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.case-body p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(108, 99, 255, 0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

/* News */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-4px);
}

.news-date {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 8px;
    display: block;
}

.news-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.news-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.read-more {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary);
}

/* Testimonials */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.15;
    position: absolute;
    top: 10px;
    left: 20px;
    font-family: Georgia, serif;
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    font-weight: 600;
    color: var(--primary);
}

/* Partners */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    align-items: center;
}

.partner-item {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.partner-item:hover {
    transform: scale(1.05);
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid rgba(108, 99, 255, 0.1);
    padding: 18px 0;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.05rem;
    padding: 4px 0;
}

.faq-question span {
    transition: var(--transition);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

.faq-answer.active {
    max-height: 500px;
    padding-top: 12px;
}

.faq-question .icon {
    font-size: 1.2rem;
    transition: var(--transition);
}

.faq-question.active .icon {
    transform: rotate(45deg);
}

/* HowTo */
.howto-steps {
    max-width: 700px;
    margin: 0 auto;
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    align-items: flex-start;
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    background: var(--primary);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.howto-step h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.howto-step p {
    color: var(--text-light);
    font-size: 0.95rem;
}

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

.contact-info p {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info svg {
    flex-shrink: 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: 12px;
    border: 2px solid rgba(108, 99, 255, 0.15);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
    margin-bottom: 16px;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.1);
}

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

/* Footer */
footer {
    background: var(--bg-card);
    border-top: 1px solid rgba(108, 99, 255, 0.08);
    padding: 60px 0 30px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-col a {
    display: block;
    color: var(--text-light);
    font-size: 0.9rem;
    padding: 4px 0;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(108, 99, 255, 0.08);
    font-size: 0.85rem;
    color: var(--text-light);
}

.footer-bottom a {
    color: var(--text-light);
    margin: 0 8px;
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* Back to top */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

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

.back-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* Scroll animations */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile */
@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 40px 0;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-buttons {
        justify-content: center;
    }
    .about-content {
        grid-template-columns: 1fr;
    }
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        padding: 20px;
        box-shadow: var(--shadow);
        border-radius: 0 0 var(--radius) var(--radius);
    }
    nav.open {
        display: flex;
    }
    .menu-toggle {
        display: flex;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .brand-story {
        padding: 30px 20px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .about-stats {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* Dark mode transition */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-light);
    padding: 20px 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb span {
    color: var(--text-light);
}

/* Search */
.search-box {
    display: flex;
    gap: 8px;
    max-width: 500px;
    margin: 20px auto 40px;
}

.search-box input {
    flex: 1;
    padding: 12px 18px;
    border-radius: 30px;
    border: 2px solid rgba(108, 99, 255, 0.15);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
}

.search-box input:focus {
    border-color: var(--primary);
    outline: none;
}

.search-box button {
    padding: 12px 28px;
    border-radius: 30px;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: 600;
}

/* EEAT */
.eeat-box {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    margin-top: 40px;
    border: 1px solid rgba(108, 99, 255, 0.05);
}

.eeat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.eeat-item {
    text-align: center;
    padding: 20px;
    background: rgba(108, 99, 255, 0.03);
    border-radius: 12px;
}

.eeat-item h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--primary);
}

.eeat-item p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Sitemap */
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.sitemap-col h4 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.sitemap-col a {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    padding: 3px 0;
}

.sitemap-col a:hover {
    color: var(--primary);
}