/* ===== Reset & Base ===== */
:root {
    --bg: #f4f7fc;
    --text: #1a2a3a;
    --accent: #c9973b;
    --accent-light: #f5e6c8;
    --glass: rgba(255, 255, 255, 0.6);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --radius: 20px;
    --transition: 0.3s ease;
}

.dark {
    --bg: #0b1a2e;
    --text: #e0e8f0;
    --accent: #f0c674;
    --accent-light: #2a3f5a;
    --glass: rgba(20, 40, 60, 0.7);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    scroll-behavior: smooth;
}

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

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

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

/* ===== Header & Nav ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
}

.nav-links a {
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 30px;
    transition: background var(--transition), color var(--transition);
    color: var(--text);
}

.nav-links a.active,
.nav-links a:hover {
    background: var(--accent);
    color: #fff;
}

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

.nav-actions button {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    transition: background var(--transition);
}

.nav-actions button:hover {
    background: var(--accent-light);
}

.menu-toggle {
    display: none;
}

.search-bar {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 8px 24px;
}

.search-bar.active {
    display: flex;
    gap: 8px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    border-radius: 30px;
    border: 1px solid var(--accent);
    background: var(--glass);
    color: var(--text);
}

.search-bar button {
    background: var(--accent);
    border: none;
    color: #fff;
    padding: 8px 16px;
    border-radius: 30px;
    cursor: pointer;
}

/* ===== Scene & Section Titles ===== */
.scene {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin: 12px auto 0;
    border-radius: 4px;
}

/* ===== Hero Banner ===== */
.hero-banner {
    position: relative;
    padding: 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: 60px;
}

.banner-slider {
    position: relative;
    width: 100%;
    height: 80vh;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0b1a2e, #1a3b5c);
}

.slide.active {
    opacity: 1;
}

.slide:nth-child(2) {
    background: linear-gradient(135deg, #1a2a3a, #2a4a6a);
}

.slide:nth-child(3) {
    background: linear-gradient(135deg, #0a1a2a, #3a5a7a);
}

.slide-content {
    text-align: center;
    color: #fff;
    z-index: 2;
    padding: 20px;
}

.slide-content h1 {
    font-size: 3.5rem;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.slide-content p {
    font-size: 1.3rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    padding: 14px 36px;
    background: var(--accent);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(201, 151, 59, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(201, 151, 59, 0.4);
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: background 0.3s;
}

.dot.active {
    background: var(--accent);
}

.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    border: none;
    font-size: 2rem;
    padding: 12px 18px;
    cursor: pointer;
    border-radius: 50%;
    z-index: 10;
    transition: background 0.3s;
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(0, 0, 0, 0.6);
}

.banner-prev {
    left: 20px;
}

.banner-next {
    right: 20px;
}

/* ===== Glass Card ===== */
.glass {
    background: var(--glass);
    backdrop-filter: blur(16px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 24px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.glass:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* ===== Grid Layouts ===== */
.brand-grid,
.culture-grid,
.team-grid,
.product-grid,
.solution-grid,
.industry-grid,
.cases-grid,
.testimonial-grid,
.news-grid,
.related-grid,
.contact-grid,
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.brand-card,
.culture-item,
.team-card,
.product-card,
.solution-card,
.industry-item,
.case-card,
.testimonial-card,
.news-card,
.related-card,
.step,
.contact-info {
    text-align: center;
}

.brand-card svg,
.culture-item svg,
.team-card svg,
.product-card svg,
.solution-card svg,
.industry-item svg,
.case-card svg,
.testimonial-card svg {
    margin: 0 auto 16px;
}

/* ===== Stats ===== */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
}

.stat-label {
    font-size: 1rem;
    color: var(--text);
    opacity: 0.8;
}

/* ===== Client Logos ===== */
.client-logos {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    align-items: center;
}

.client-logos svg {
    opacity: 0.7;
    transition: opacity 0.3s;
}

.client-logos svg:hover {
    opacity: 1;
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 16px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: var(--radius);
    transition: background 0.3s;
}

.faq-question:hover {
    background: var(--accent-light);
}

.faq-icon {
    font-size: 1.5rem;
    transition: transform 0.3s;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding: 0 20px;
}

.faq-answer p {
    padding: 12px 0;
}

/* ===== HowTo Steps ===== */
.howto-steps {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
}

.step-num {
    display: none;
}

/* ===== Contact Form ===== */
.contact-form {
    max-width: 500px;
    margin: 32px auto 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 16px;
    border-radius: 12px;
    border: 1px solid var(--accent);
    background: var(--glass);
    color: var(--text);
}

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

.contact-form button {
    width: 100%;
}

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

.links-list a {
    padding: 8px 20px;
    background: var(--glass);
    border-radius: 30px;
    transition: background 0.3s;
}

.links-list a:hover {
    background: var(--accent);
    color: #fff;
}

/* ===== Sitemap ===== */
.sitemap-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.sitemap-grid h3 {
    margin-bottom: 12px;
    color: var(--accent);
}

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

.sitemap-grid li {
    margin-bottom: 6px;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--glass);
    backdrop-filter: blur(10px);
    padding: 40px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 32px;
}

.footer-brand p {
    margin-top: 8px;
    opacity: 0.7;
}

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

.footer-links li,
.footer-legal li {
    margin-bottom: 6px;
}

.footer-bottom {
    text-align: center;
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 99;
}

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

/* ===== Scroll Animations ===== */
.scene {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.brand-card,
.culture-item,
.team-card,
.product-card,
.solution-card,
.industry-item,
.case-card,
.testimonial-card,
.news-card,
.related-card,
.faq-item,
.step,
.contact-info,
.contact-form {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.brand-card.visible,
.culture-item.visible,
.team-card.visible,
.product-card.visible,
.solution-card.visible,
.industry-item.visible,
.case-card.visible,
.testimonial-card.visible,
.news-card.visible,
.related-card.visible,
.faq-item.visible,
.step.visible,
.contact-info.visible,
.contact-form.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: var(--glass);
        backdrop-filter: blur(20px);
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 20px;
        gap: 12px;
    }

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

    .menu-toggle {
        display: block;
    }

    .slide-content h1 {
        font-size: 2rem;
    }

    .stats-grid {
        gap: 24px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .banner-prev,
    .banner-next {
        padding: 8px 12px;
        font-size: 1.5rem;
    }
}