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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4a9ff5;
    --accent: #ff6b35;
    --bg: #f8faff;
    --text: #1a1a2e;
    --card-bg: rgba(255, 255, 255, 0.85);
    --glass: rgba(255, 255, 255, 0.6);
    --shadow: 0 8px 32px rgba(26, 115, 232, 0.1);
    --radius: 20px;
    --nav-bg: rgba(255, 255, 255, 0.9);
    --footer-bg: #0f1b2d;
    --footer-text: #c8d6e5;
    --border: rgba(26, 115, 232, 0.1);
}

[data-theme="dark"] {
    --bg: #0d1117;
    --text: #e6edf3;
    --card-bg: rgba(22, 27, 34, 0.9);
    --glass: rgba(22, 27, 34, 0.7);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --nav-bg: rgba(13, 17, 23, 0.95);
    --footer-bg: #010409;
    --footer-text: #8b949e;
    --border: rgba(48, 54, 61, 0.5);
}

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

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

section {
    padding: 80px 0;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
}

h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}

h2:after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin: 12px auto 0;
    border-radius: 2px;
}

h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    box-shadow: none;
}

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

.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(26, 115, 232, 0.15);
}

.grid {
    display: grid;
    gap: 30px;
}

.flex {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.6rem;
    }
    section {
        padding: 50px 0;
    }
    .container {
        padding: 0 16px;
    }
}

/* ===== Navigation ===== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.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-links {
    display: flex;
    gap: 24px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text);
    transition: color 0.3s;
    position: relative;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

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

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

.theme-toggle {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text);
    transition: all 0.3s;
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text);
    padding: 4px;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--nav-bg);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.4s;
        pointer-events: none;
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg) 0%, rgba(26, 115, 232, 0.05) 50%, var(--bg) 100%);
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 20px;
    text-align: center;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-slide p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px;
    color: var(--text);
    opacity: 0.8;
}

.hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 2;
}

.hero-indicators button {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s;
}

.hero-indicators button.active {
    background: var(--primary);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .hero-slide h1 {
        font-size: 2rem;
    }
    .hero-slide p {
        font-size: 1rem;
    }
}

/* ===== About Section ===== */
.about {
    background: var(--bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Story Section ===== */
.story {
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.03), rgba(255, 107, 53, 0.03));
}

.story-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ===== Culture Section ===== */
.culture-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.culture-item {
    text-align: center;
    padding: 30px 20px;
}

.culture-item .icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
}

/* ===== Team Section ===== */
.team-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.team-card {
    text-align: center;
    padding: 30px 20px;
}

.team-card .avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
    font-weight: 700;
}

.team-card .role {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

/* ===== Products Section ===== */
.products {
    background: var(--bg);
}

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

.product-card {
    padding: 30px;
}

.product-card .product-icon {
    font-size: 2.8rem;
    margin-bottom: 16px;
    display: block;
}

.product-card .tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

/* ===== Advantages Section ===== */
.advantages-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.advantage-item {
    text-align: center;
    padding: 30px 20px;
}

.advantage-item .num {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 8px;
}

/* ===== Cases Section ===== */
.cases-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.case-card {
    padding: 25px;
}

.case-card .case-img {
    width: 100%;
    height: 180px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 600;
}

/* ===== Partners Section ===== */
.partners {
    background: var(--bg);
}

.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.partner-item {
    width: 120px;
    height: 60px;
    background: var(--card-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text);
    opacity: 0.6;
    border: 1px solid var(--border);
    transition: all 0.3s;
    padding: 0 10px;
    text-align: center;
    font-size: 0.9rem;
}

.partner-item:hover {
    opacity: 1;
    transform: scale(1.05);
}

/* ===== Testimonials Section ===== */
.testimonials-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.testimonial-card {
    padding: 30px;
    position: relative;
}

.testimonial-card .quote {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 16px;
    opacity: 0.9;
}

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

.testimonial-card .company {
    font-size: 0.85rem;
    opacity: 0.7;
}

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

.news-card {
    padding: 25px;
}

.news-card .date {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 8px;
    display: block;
}

.news-card .summary {
    opacity: 0.8;
    font-size: 0.95rem;
}

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

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.05rem;
    padding: 8px 0;
    transition: color 0.3s;
}

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

.faq-question .arrow {
    transition: transform 0.3s;
    font-size: 1.2rem;
}

.faq-item.open .faq-question .arrow {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 8px 0 16px;
    opacity: 0.8;
    line-height: 1.7;
    display: none;
}

.faq-item.open .faq-answer {
    display: block;
}

/* ===== Contact Section ===== */
.contact {
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.03), rgba(255, 107, 53, 0.03));
}

.contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

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

.contact-info .label {
    font-weight: 600;
    min-width: 80px;
}

/* ===== Footer ===== */
footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 60px 0 30px;
}

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

.footer-col h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

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

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    color: var(--footer-text);
    transition: color 0.3s;
    font-size: 0.9rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    opacity: 0.7;
}

.footer-bottom p {
    margin-bottom: 6px;
}

/* ===== Scroll to Top ===== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
    transition: all 0.3s;
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: center;
}

.scroll-top.visible {
    display: flex;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.4);
}

/* ===== Search Bar ===== */
.search-bar {
    display: flex;
    max-width: 500px;
    margin: 0 auto 40px;
    gap: 0;
}

.search-bar input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--border);
    border-right: none;
    border-radius: 50px 0 0 50px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text);
    outline: none;
    transition: border 0.3s;
}

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

.search-bar button {
    padding: 14px 24px;
    border-radius: 0 50px 50px 0;
    border: 2px solid var(--primary);
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

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

/* ===== Stats Section ===== */
.stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    text-align: center;
}

.stat-item .stat-num {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.stat-item .stat-label {
    font-size: 1rem;
    opacity: 0.8;
    margin-top: 8px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    display: flex;
    gap: 8px;
    list-style: none;
    padding: 12px 0;
    font-size: 0.9rem;
    opacity: 0.7;
    flex-wrap: wrap;
}

.breadcrumb li:not(:last-child):after {
    content: '/';
    margin-left: 8px;
    opacity: 0.5;
}

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

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

/* ===== Animation Classes ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
}

/* ===== Lazy Image Placeholder ===== */
.lazy-img {
    background: linear-gradient(135deg, var(--border), transparent);
    min-height: 100px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    opacity: 0.5;
    font-size: 0.9rem;
}