/* ============================================================
   SOCAM INTERNATIONAL LIMITED - Official Website Stylesheet
   ============================================================
   Color Palette:
   - Primary Blue:   #0056b3
   - Dark Blue:      #003d80
   - Light Blue:     #e8f0fe
   - Accent Blue:    #0078d4
   - Dark Text:      #1a1a2e
   - Body Text:      #4a4a6a
   - Light Gray BG:  #f7f8fc
   - White:          #ffffff
   ============================================================ */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* offset for fixed navbar */
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #4a4a6a;
    line-height: 1.7;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

/* ==================== Utility: Container ==================== */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== Navigation Bar ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(26, 26, 46, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
    font-weight: 700;
    font-size: 1.2rem;
}

.nav-logo-img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 6px;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #0078d4, #0056b3);
    color: #ffffff;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 8px;
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    display: inline-block;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 6px;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Mobile menu toggle button */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: #ffffff;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Hamburger animation when open */
.nav-toggle.open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a1628 0%, #1a1a2e 30%, #0056b3 100%);
    overflow: hidden;
    padding: 120px 0 80px;
}

/* Particle network canvas */
.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Decorative background pattern */
.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 120, 212, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 86, 179, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 60% 80%, rgba(0, 120, 212, 0.08) 0%, transparent 40%);
    animation: subtlePulse 8s ease-in-out infinite alternate;
}

@keyframes subtlePulse {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #ffffff;
    max-width: 800px;
}

.hero-title {
    font-family: 'Poppins', sans-serif;
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #0078d4, #0056b3);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 86, 179, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ==================== Section Common Styles ==================== */
.section {
    padding: 100px 0;
}

.section-title {
    font-family: 'Poppins', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: #1a1a2e;
    text-align: center;
    margin-bottom: 12px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #0056b3, #0078d4);
    border-radius: 2px;
    margin: 0 auto 24px;
}

.section-description {
    text-align: center;
    font-size: 1.05rem;
    color: #6a6a8a;
    max-width: 600px;
    margin: 0 auto 50px;
}

/* ==================== About Us Section ==================== */
.about {
    background: linear-gradient(rgba(10, 22, 40, 0.82), rgba(26, 26, 46, 0.85)),
                url('../images/about-bg.jpg') center center / cover no-repeat;
    background-attachment: fixed;
}

/* Override text colors for dark background */
.about .section-title {
    color: #ffffff;
}

.about-text p {
    color: rgba(255, 255, 255, 0.85) !important;
}

.about-text strong {
    color: #ffffff !important;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    margin-bottom: 18px;
    font-size: 1rem;
    color: #4a4a6a;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-text strong {
    color: #1a1a2e;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-card {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.highlight-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #e8f0fe, #d0e2ff);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0056b3;
}

.highlight-icon svg {
    width: 24px;
    height: 24px;
}

.highlight-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 4px;
}

.highlight-card p {
    font-size: 0.9rem;
    color: #6a6a8a;
    margin-bottom: 0;
}

/* ==================== Brands Section ==================== */
.brands {
    background: linear-gradient(rgba(10, 22, 40, 0.88), rgba(26, 26, 46, 0.9)),
                url('../images/brands-bg.jpg') center center / cover no-repeat;
    background-attachment: fixed;
}

.brands .section-title {
    color: #ffffff;
}

.brands .section-description {
    color: rgba(255, 255, 255, 0.75);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.brand-card {
    background: #ffffff;
    border: 1px solid #e8edf5;
    border-radius: 16px;
    padding: 36px 28px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.brand-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 86, 179, 0.12);
    border-color: #0078d4;
}

/* When card is inside a link, disable direct hover transform (handled by .brand-card-link:hover) */
.brand-card-link .brand-card:hover {
    transform: none;
}

.brand-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.brand-card-link:hover .brand-card {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 86, 179, 0.12);
    border-color: #0078d4;
}

.brand-logo-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin: 0 auto 24px;
    padding: 10px;
    background: #f7f8fc;
    border-radius: 16px;
}

.brand-logo-placeholder {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #e8f0fe, #d0e2ff);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo-text {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    color: #0056b3;
    letter-spacing: 1px;
}

.brand-name {
    font-family: 'Poppins', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 4px;
}

.brand-name-cn {
    font-size: 0.9rem;
    color: #8a8aaa;
    margin-bottom: 16px;
}

.brand-description {
    font-size: 0.95rem;
    color: #4a4a6a;
    line-height: 1.7;
    margin-bottom: 20px;
}

.brand-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.tag {
    display: inline-block;
    padding: 5px 14px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #0056b3;
    background-color: #e8f0fe;
    border-radius: 20px;
}

/* ==================== Contact Section ==================== */
.contact {
    background: linear-gradient(rgba(10, 22, 40, 0.85), rgba(26, 26, 46, 0.88)),
                url('../images/contact-bg.jpg') center center / cover no-repeat;
    background-attachment: fixed;
}

.contact .section-title {
    color: #ffffff;
}

.contact .section-description {
    color: rgba(255, 255, 255, 0.75);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

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

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-color: rgba(255, 255, 255, 0.12);
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 120, 212, 0.2);
    background: rgba(255, 255, 255, 0.12);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #0078d4, #0056b3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-detail h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-detail a {
    font-size: 1.05rem;
    font-weight: 500;
    color: #ffffff;
}

.contact-detail a:hover {
    color: #4db8ff;
}

.contact-detail p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.contact-map {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    min-height: 360px;
}

.contact-map iframe {
    display: block;
    min-height: 360px;
}

/* ==================== Footer ==================== */
.footer {
    background-color: #1a1a2e;
    color: rgba(255, 255, 255, 0.7);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo-img {
    width: 34px;
    height: 34px;
    object-fit: contain;
    border-radius: 4px;
}

.logo-icon-sm {
    width: 30px;
    height: 30px;
    font-size: 0.9rem;
}

.footer-company-name {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: #ffffff;
    letter-spacing: 1.5px;
}

.footer-copyright {
    font-size: 0.85rem;
}

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

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

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

/* Tablet: 768px - 1024px */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.6rem;
    }

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

    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

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

/* Mobile: below 768px */
@media (max-width: 768px) {
    html {
        scroll-padding-top: 68px;
    }

    /* iOS 不支持 background-attachment: fixed */
    .about,
    .brands,
    .contact {
        background-attachment: scroll;
    }

    .nav-container {
        height: 64px;
    }

    /* Show hamburger, hide desktop nav */
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        background-color: #1a1a2e;
        padding: 100px 30px 40px;
        gap: 4px;
        transition: right 0.35s ease;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
    }

    .nav-links.open {
        right: 0;
    }

    .nav-link {
        font-size: 1.1rem;
        padding: 14px 18px;
        border-radius: 8px;
    }

    /* Hero adjustments */
    .hero {
        min-height: auto;
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    /* Section adjustments */
    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    /* Brands single column on mobile */
    .brands-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .brand-card {
        padding: 28px 24px;
    }
}

/* Small mobile: below 480px */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.7rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .btn {
        padding: 12px 28px;
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .highlight-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .contact-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
}