/* ============================================
   壹号娱乐官网 - 主样式表
   YI HAO YU LE - Main Stylesheet
   ============================================ */

/* ===== CSS Variables & Theme ===== */
:root {
    /* Colors - 渐变风格 */
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4a8fe7;
    --secondary: #6c63ff;
    --accent: #ff6b6b;
    --accent-light: #ffa94d;
    --success: #34a853;
    --bg-dark: #0f0f1a;
    --bg-card-dark: rgba(255, 255, 255, 0.03);
    --border-dark: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #b0b0b0;
    --text-dim: #888888;
    --text-dark: #333333;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1a73e8, #6c63ff);
    --gradient-accent: linear-gradient(135deg, #ff6b6b, #ffa94d);
    --gradient-success: linear-gradient(135deg, #34a853, #1a73e8);
    --gradient-bg: radial-gradient(ellipse at 20% 50%, rgba(26, 115, 232, 0.15), transparent 60%),
                    radial-gradient(ellipse at 80% 50%, rgba(108, 99, 255, 0.1), transparent 60%);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 8px 25px rgba(26, 115, 232, 0.4);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Font Sizes */
    --font-xs: 0.8rem;
    --font-sm: 0.9rem;
    --font-base: 1rem;
    --font-md: 1.1rem;
    --font-lg: 1.2rem;
    --font-xl: 1.3rem;
    --font-2xl: 1.8rem;
    --font-3xl: 2.2rem;
    --font-4xl: 2.8rem;
    --font-5xl: 3rem;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-dark);
    color: var(--text-secondary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background var(--transition-base), color var(--transition-base);
    min-height: 100vh;
}

/* ===== Utility Classes ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

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

/* ===== Section Styling ===== */
.section {
    padding: 80px 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Typography ===== */
h1 {
    font-size: var(--font-4xl);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

h2 {
    font-size: var(--font-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin-top: 8px;
}

h3 {
    font-size: var(--font-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.section-desc {
    font-size: var(--font-md);
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 40px;
    text-align: center;
    line-height: 1.8;
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-block;
    padding: 14px 32px;
    background: var(--gradient-primary);
    color: var(--text-primary);
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-base);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    display: inline-block;
    padding: 14px 32px;
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-base);
    transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
    cursor: pointer;
}

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

.card-link {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.card-link:hover {
    color: var(--primary);
}

/* ===== Glass Card Effect ===== */
.glass-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ===== Header & Navigation ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--transition-base);
}

.logo:hover {
    opacity: 0.9;
}

.logo svg {
    width: 120px;
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-sm);
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: width var(--transition-base);
    border-radius: 1px;
}

.nav-links a:hover {
    color: var(--text-primary);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-actions button {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-base), color var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-actions button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.menu-toggle {
    display: none;
}

/* Search Bar */
.search-bar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.search-bar form {
    display: flex;
    gap: 10px;
}

.search-bar input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: var(--font-base);
    outline: none;
    transition: border var(--transition-base);
}

.search-bar input:focus {
    border-color: var(--secondary);
}

.search-bar input::placeholder {
    color: var(--text-dim);
}

.search-bar button {
    background: var(--primary);
    border: none;
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: 25px;
    cursor: pointer;
    transition: background var(--transition-base);
    display: flex;
    align-items: center;
    gap: 6px;
}

.search-bar button:hover {
    background: var(--secondary);
}

/* ===== Hero Banner ===== */
.hero-banner {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 100px 20px 60px;
    background: var(--gradient-bg);
}

.banner-slider {
    position: relative;
    width: 100%;
    max-width: 1200px;
    overflow: hidden;
}

.slide {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    animation: fadeSlide 0.5s ease;
}

.slide.active {
    display: grid;
}

@keyframes fadeSlide {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-content h1 {
    font-size: var(--font-5xl);
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff, #a0b4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-content p {
    font-size: var(--font-md);
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.8;
}

.banner-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.slide-image svg {
    width: 100%;
    height: auto;
    max-width: 500px;
    filter: drop-shadow(0 10px 30px rgba(26, 115, 232, 0.2));
}

/* Banner Controls */
.banner-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 20px;
}

.banner-prev,
.banner-next {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-base), transform var(--transition-base);
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(26, 115, 232, 0.5);
    transform: scale(1.1);
}

.banner-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-base);
}

.dot.active {
    background: var(--primary);
    transform: scale(1.3);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    padding: 16px 20px;
    max-width: 1200px;
    margin: 0 auto;
    font-size: var(--font-sm);
    color: var(--text-dim);
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 8px;
}

.breadcrumb a {
    color: var(--secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ===== About Section ===== */
.about-section {
    text-align: center;
}

.about-section .section-desc {
    text-align: left;
    font-size: 1.05rem;
    line-height: 1.9;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.stat-item {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(26, 115, 232, 0.15);
}

.stat-number {
    font-size: var(--font-4xl);
    font-weight: 800;
    color: var(--primary);
    display: inline;
}

.stat-suffix {
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary);
}

.stat-label {
    display: block;
    font-size: var(--font-base);
    color: var(--text-dim);
    margin-top: 8px;
}

/* ===== Story Section ===== */
.story-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.story-text p {
    margin-bottom: 16px;
    color: var(--text-muted);
    line-height: 1.8;
}

.story-image svg {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base);
}

.story-image svg:hover {
    transform: scale(1.02);
}

/* ===== Culture Section ===== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(108, 99, 255, 0.15);
}

.culture-card svg {
    margin-bottom: 12px;
}

.culture-card h3 {
    margin: 16px 0 10px;
    color: var(--text-primary);
}

.culture-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    line-height: 1.7;
}

/* ===== Products Section ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(26, 115, 232, 0.15);
}

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

.product-icon svg {
    transition: transform var(--transition-base);
}

.product-card:hover .product-icon svg {
    transform: scale(1.1) rotate(5deg);
}

.product-card h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
}

.product-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-bottom: 16px;
    line-height: 1.7;
}

/* ===== Features Section ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.feature-item {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.feature-item:hover {
    transform: translateY(-3px);
}

.feature-item svg {
    margin-bottom: 12px;
}

.feature-item h3 {
    color: var(--text-primary);
    margin: 12px 0 8px;
}

.feature-item p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    line-height: 1.7;
}

/* ===== Service Section ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.service-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 25px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-3px);
}

.service-card h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.service-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    line-height: 1.6;
}

/* ===== Solutions Section ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.solution-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 25px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.solution-card:hover {
    transform: translateY(-3px);
}

.solution-card h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.solution-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    line-height: 1.6;
}

/* ===== Scenarios Section ===== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.scenario-item {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.scenario-item:hover {
    transform: translateY(-3px);
}

.scenario-item svg {
    margin-bottom: 12px;
}

.scenario-item h3 {
    color: var(--text-primary);
    margin: 12px 0 8px;
}

.scenario-item p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    line-height: 1.6;
}

/* ===== Data Section ===== */
.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.data-item {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.data-item:hover {
    transform: translateY(-3px);
}

.data-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    display: inline;
}

.data-unit {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary);
    margin-left: 4px;
}

.data-label {
    display: block;
    font-size: var(--font-base);
    color: var(--text-dim);
    margin-top: 8px;
}

/* ===== Cases Section ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(108, 99, 255, 0.15);
}

.case-card h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
}

.case-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-bottom: 16px;
    line-height: 1.7;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(26, 115, 232, 0.2);
    color: var(--primary);
    border-radius: 20px;
    font-size: var(--font-xs);
    font-weight: 500;
}

/* ===== Clients Section ===== */
.clients-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.client-logo svg {
    width: 120px;
    height: 60px;
    border-radius: var(--radius-sm);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.client-logo svg:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

/* ===== Testimonials Section ===== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-style: italic;
    transition: transform var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-3px);
}

.testimonial-card p {
    color: var(--text-muted);
    font-size: var(--font-base);
    line-height: 1.7;
    margin-bottom: 16px;
}

.testimonial-card footer {
    color: var(--text-dim);
    font-size: var(--font-sm);
    font-style: normal;
}

/* ===== News Section ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.news-card:hover {
    transform: translateY(-3px);
}

.news-card h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-meta {
    color: var(--text-dim);
    font-size: var(--font-xs);
    margin-bottom: 12px;
}

.news-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-bottom: 16px;
    line-height: 1.6;
}

/* ===== Articles Section ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.article-card {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.article-card:hover {
    transform: translateY(-3px);
}

.article-card h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.article-card p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-bottom: 12px;
    line-height: 1.6;
}

.article-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(108, 99, 255, 0.2);
    color: var(--secondary);
    border-radius: 20px;
    font-size: var(--font-xs);
}

/* ===== Hot Section ===== */
.hot-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.hot-item {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
    position: relative;
}

.hot-item:hover {
    transform: translateY(-3px);
}

.hot-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    background: var(--gradient-accent);
    color: var(--text-primary);
    border-radius: 20px;
    font-size: var(--font-xs);
    font-weight: 600;
}

.hot-item h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
}

.hot-item p {
    color: var(--text-muted);
    font-size: var(--font-sm);
}

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

.faq-item {
    border-bottom: 1px solid var(--border-dark);
    padding: 16px 0;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 0;
    text-align: left;
    transition: color var(--transition-base);
}

.faq-question:hover {
    color: var(--text-primary);
}

.faq-question svg {
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.faq-question[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 12px 0 8px;
    color: var(--text-muted);
    font-size: var(--font-sm);
    line-height: 1.7;
}

/* ===== HowTo Section ===== */
.howto-steps {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 30px;
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.step:hover {
    transform: translateX(5px);
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-lg);
    flex-shrink: 0;
}

.step h3 {
    color: var(--text-primary);
    margin-bottom: 6px;
}

.step p {
    color: var(--text-muted);
    font-size: var(--font-sm);
}

/* ===== Contact Section ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: var(--font-base);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--secondary);
}

.contact-form {
    background: var(--bg-card-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-size: var(--font-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: var(--font-base);
    outline: none;
    transition: border var(--transition-base);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--secondary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-dim);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== Sitemap Section ===== */
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.sitemap-col h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
}

.sitemap-col ul {
    list-style: none;
}

.sitemap-col li {
    margin-bottom: 8px;
}

.sitemap-col a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-sm);
    transition: color var(--transition-base);
    display: inline-block;
    position: relative;
    padding-left: 0;
    transition: padding-left var(--transition-base), color var(--transition-base);
}

.sitemap-col a:hover {
    color: var(--secondary);
    padding-left: 5px;
}

/* ===== Links Section ===== */
.links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.links-list a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: var(--font-sm);
    transition: color var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

.links-list a:hover {
    color: var(--secondary);
    border-color: var(--secondary);
    background: rgba(108, 99, 255, 0.05);
}

/* ===== Footer ===== */
.site-footer {
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-top: 16px;
    line-height: 1.7;
}

.footer-eeat {
    font-size: var(--font-xs);
    color: var(--text-dim);
    line-height: 1.8;
    margin-top: 12px;
}

.footer-eeat strong {
    color: var(--text-dim);
}

.footer-links h3,
.footer-legal h3,
.footer-contact h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-links ul,
.footer-legal ul {
    list-style: none;
}

.footer-links li,
.footer-legal li {
    margin-bottom: 10px;
}

.footer-links a,
.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-sm);
    transition: color var(--transition-base);
}

.footer-links a:hover,
.footer-legal a:hover {
    color: var(--secondary);
}

.footer-contact p {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-bottom: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-dim);
    font-size: var(--font-sm);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--text-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
}

/* ===== Dark Mode (Default) ===== */
body.dark-mode {
    background: var(--bg-dark);
    color: var(--text-secondary);
}

body.dark-mode .site-header {
    background: rgba(15, 15, 26, 0.9);
}

body.dark-mode .nav-links a {
    color: var(--text-muted);
}

body.dark-mode .nav-links a:hover {
    color: var(--text-primary);
}

/* ===== Light Mode ===== */
body:not(.dark-mode) {
    background: #f8f9fa;
    color: var(--text-dark);
}

body:not(.dark-mode) .site-header {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

body:not(.dark-mode) .nav-links a {
    color: #555;
}

body:not(.dark-mode) .nav-links a:hover {
    color: var(--primary);
}

body:not(.dark-mode) h1,
body:not(.dark-mode) h2,
body:not(.dark-mode) h3 {
    color: #222;
}

body:not(.dark-mode) .section-desc {
    color: #666;
}

body:not(.dark-mode) .slide-content h1 {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body:not(.dark-mode) .slide-content p {
    color: #555;
}

body:not(.dark-mode) .stat-item,
body:not(.dark-mode) .culture-card,
body:not(.dark-mode) .product-card,
body:not(.dark-mode) .feature-item,
body:not(.dark-mode) .service-card,
body:not(.dark-mode) .solution-card,
body:not(.dark-mode) .scenario-item,
body:not(.dark-mode) .data-item,
body:not(.dark-mode) .case-card,
body:not(.dark-mode) .testimonial-card,
body:not(.dark-mode) .news-card,
body:not(.dark-mode) .article-card,
body:not(.dark-mode) .hot-item,
body:not(.dark-mode) .step,
body:not(.dark-mode) .contact-form {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(0, 0, 0, 0.1);
}

body:not(.dark-mode) .stat-number,
body:not(.dark-mode) .data-number {
    color: var(--primary);
}

body:not(.dark-mode) .stat-suffix,
body:not(.dark-mode) .data-unit {
    color: var(--secondary);
}

body:not(.dark-mode) .stat-label,
body:not(.dark-mode) .data-label {
    color: #888;
}

body:not(.dark-mode) .culture-card p,
body:not(.dark-mode) .product-card p,
body:not(.dark-mode) .feature-item p,
body:not(.dark-mode) .service-card p,
body:not(.dark-mode) .solution-card p,
body:not(.dark-mode) .scenario-item p,
body:not(.dark-mode) .case-card p,
body:not(.dark-mode) .testimonial-card p,
body:not(.dark-mode) .news-card p,
body:not(.dark-mode) .article-card p,
body:not(.dark-mode) .hot-item p,
body:not(.dark-mode) .step p,
body:not(.dark-mode) .faq-answer,
body:not(.dark-mode) .contact-item,
body:not(.dark-mode) .footer-brand p,
body:not(.dark-mode) .footer-contact p,
body:not(.dark-mode) .sitemap-col a,
body:not(.dark-mode) .links-list a {
    color: #555;
}

body:not(.dark-mode) .culture-card h3,
body:not(.dark-mode) .product-card h3,
body:not(.dark-mode) .feature-item h3,
body:not(.dark-mode) .service-card h3,
body:not(.dark-mode) .solution-card h3,
body:not(.dark-mode) .scenario-item h3,
body:not(.dark-mode) .case-card h3,
body:not(.dark-mode) .news-card h3,
body:not(.dark-mode) .article-card h3,
body:not(.dark-mode) .hot-item h3,
body:not(.dark-mode) .step h3,
body:not(.dark-mode) .sitemap-col h3,
body:not(.dark-mode) .footer-links h3,
body:not(.dark-mode) .footer-legal h3,
body:not(.dark-mode) .footer-contact h3 {
    color: #222;
}

body:not(.dark-mode) .faq-question {
    color: #444;
}

body:not(.dark-mode) .faq-question:hover {
    color: var(--primary);
}

body:not(.dark-mode) .news-meta {
    color: #999;
}

body:not(.dark-mode) .testimonial-card footer {
    color: #888;
}

body:not(.dark-mode) .breadcrumb a {
    color: var(--primary);
}

body:not(.dark-mode) .breadcrumb {
    color: #888;
}

body:not(.dark-mode) .footer-eeat {
    color: #888;
}

body:not(.dark-mode) .footer-eeat strong {
    color: #555;
}

body:not(.dark-mode) .site-footer {
    background: rgba(0, 0, 0, 0.03);
}

body:not(.dark-mode) .search-bar input {
    color: var(--text-dark);
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.2);
}

body:not(.dark-mode) .search-bar input:focus {
    border-color: var(--primary);
}

body:not(.dark-mode) .form-group input,
body:not(.dark-mode) .form-group textarea {
    color: var(--text-dark);
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.2);
}

body:not(.dark-mode) .form-group input:focus,
body:not(.dark-mode) .form-group textarea:focus {
    border-color: var(--primary);
}

body:not(.dark-mode) .form-group label {
    color: #555;
}

body:not(.dark-mode) .hero-banner {
    background: radial-gradient(ellipse at 20% 50%, rgba(26, 115, 232, 0.08), transparent 60%),
                radial-gradient(ellipse at 80% 50%, rgba(108, 99, 255, 0.05), transparent 60%);
}

/* ===== Responsive Design ===== */

/* Tablet */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

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

/* Mobile */
@media (max-width: 768px) {
    h1 {
        font-size: var(--font-3xl);
    }

    h2 {
        font-size: var(--font-2xl);
    }

    .section {
        padding: 50px 0;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 15, 26, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        z-index: 999;
    }

    .nav-links.open {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

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

    .slide-content h1 {
        font-size: var(--font-4xl);
    }

    .slide-image {
        display: none;
    }

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

    .culture-grid,
    .products-grid,
    .service-grid,
    .solutions-grid,
    .scenarios-grid,
    .cases-grid,
    .testimonials-grid,
    .news-grid,
    .articles-grid,
    .hot-grid,
    .sitemap-grid {
        grid-template-columns: 1fr;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .banner-controls {
        bottom: 20px;
    }

    .banner-prev,
    .banner-next {
        width: 36px;
        height: 36px;
        font-size: 1.2rem;
    }

    .hero-banner {
        min-height: 70vh;
        padding: 80px 20px 40px;
    }

    .about-stats {
        margin-top: 30px;
    }

    .stat-number,
    .data-number {
        font-size: var(--font-3xl);
    }

    .stat-suffix,
    .data-unit {
        font-size: 1.5rem;
    }

    .contact-grid {
        gap: 30px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .about-stats,
    .data-grid {
        grid-template-columns: 1fr;
    }

    .stat-number,
    .data-number {
        font-size: var(--font-2xl);
    }

    .slide-content h1 {
        font-size: 1.8rem;
    }

    .banner-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .hero-banner {
        min-height: 60vh;
        padding: 70px 15px 30px;
    }

    .section {
        padding: 40px 0;
    }

    .container {
        padding: 0 15px;
    }

    .nav-container {
        padding: 10px 15px;
    }

    .logo svg {
        width: 100px;
        height: 35px;
    }
}

/* ===== Print Styles ===== */
@media print {
    .site-header,
    .banner-controls,
    .back-to-top,
    .nav-actions,
    .search-bar {
        display: none !important;
    }

    .section {
        opacity: 1 !important;
        transform: none !important;
        page-break-inside: avoid;
    }

    body {
        background: white;
        color: black;
    }

    .hero-banner {
        min-height: auto;
        padding: 20px;
    }
}