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

:root {
    --color-primary: #1a4d8f;
    --color-primary-dark: #0f2d54;
    --color-primary-light: #2563eb;
    --color-accent: #0ea5e9;
    --color-bg: #f8fafc;
    --color-white: #ffffff;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --color-dark: #0f172a;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
    --radius: 8px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

.section {
    padding: 100px 0;
}

/* ===========================
   Section Header
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-primary-light);
    margin-bottom: 12px;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: 1px;
}

.section-divider {
    width: 48px;
    height: 4px;
    background: var(--color-primary-light);
    border-radius: 2px;
    margin: 16px auto 20px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--color-primary-light);
    color: var(--color-white);
    border-color: var(--color-primary-light);
}

.btn-primary:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.btn-full {
    width: 100%;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.97);
    box-shadow: var(--shadow-md);
    padding: 12px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
    color: var(--color-white);
    transition: var(--transition);
}

.navbar.scrolled .logo {
    color: var(--color-primary);
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 6px;
    background: rgba(255,255,255,0.95);
    padding: 2px;
}

.navbar.scrolled .logo-img {
    box-shadow: 0 2px 8px rgba(37,99,235,0.2);
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    border-radius: 6px;
    transition: var(--transition);
    position: relative;
}

.navbar.scrolled .nav-link {
    color: var(--color-text);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
    background: rgba(255,255,255,0.15);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--color-primary-light);
    background: rgba(37,99,235,0.08);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 26px;
    height: 3px;
    background: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}

.navbar.scrolled .hamburger span {
    background: var(--color-text);
}

.lang-toggle {
    flex-shrink: 0;
    margin-left: 18px;
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.lang-toggle:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.navbar.scrolled .lang-toggle {
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.2);
}

.navbar.scrolled .lang-toggle:hover {
    color: #fff;
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===========================
   Hero
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #0a1f3c 0%, #0f2d54 30%, #1a4d8f 60%, #2563eb 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(14,165,233,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(37,99,235,0.2) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(59,130,246,0.1) 0%, transparent 50%);
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('images/banner.jpg') center/cover no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 24px;
    animation: fadeInUp 1s ease;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 30px;
    font-size: 14px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 2px;
    margin-bottom: 12px;
    line-height: 1.2;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-en {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 2px;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 12px;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.3);
    margin: 8px auto 0;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--color-white);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

.about-image {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: var(--transition);
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-image-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(255,255,255,0.95);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-md);
}

.badge-icon {
    color: #f59e0b;
    font-size: 16px;
}

.about-lead {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.about-text p {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.9;
}

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

.about-info {
    margin-top: 24px;
    padding: 20px;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.about-info-item {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
}

.about-info-item:last-child {
    border-bottom: none;
}

.about-info-label {
    font-size: 13px;
    color: var(--color-text-light);
    font-weight: 500;
    min-width: 120px;
}

.about-info-value {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 600;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    background: var(--color-white);
    padding: 32px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-top: 3px solid transparent;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-top-color: var(--color-primary-light);
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-light);
    font-weight: 500;
}

/* ===========================
   Products
   =========================== */
.products {
    background: var(--color-white);
}

.product-category {
    margin-bottom: 60px;
}

.product-category:last-child {
    margin-bottom: 0;
}

.category-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
}

.category-num {
    font-size: 48px;
    font-weight: 800;
    color: rgba(37,99,235,0.12);
    line-height: 1;
    min-width: 70px;
}

.category-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.category-header p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.product-img-wrap {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--color-bg);
}

.product-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-img-wrap img {
    transform: scale(1.08);
}

.product-info {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-dark);
}

.product-tag {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(37,99,235,0.08);
    color: var(--color-primary-light);
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
    white-space: nowrap;
}

/* ===========================
   Capabilities
   =========================== */
.capabilities {
    background: var(--color-bg);
}

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

.capability-card {
    padding: 40px 30px;
    background: var(--color-white);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-primary-light);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.capability-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
    transform: translateY(-4px);
}

.capability-card:hover::before {
    transform: scaleX(1);
}

.capability-icon {
    width: 64px;
    height: 64px;
    background: rgba(37,99,235,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--color-primary-light);
    transition: var(--transition);
}

.capability-card:hover .capability-icon {
    background: var(--color-primary-light);
    color: var(--color-white);
    transform: scale(1.05);
}

.capability-icon svg {
    width: 36px;
    height: 36px;
}

.capability-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.capability-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ===========================
   Advantages
   =========================== */
.advantages {
    background: var(--color-white);
}

.advantage-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.advantage-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--color-bg);
    border-radius: var(--radius);
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.advantage-item:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    border-left-color: var(--color-primary-light);
    transform: translateX(4px);
}

.advantage-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-primary-light);
    opacity: 0.5;
    line-height: 1;
    min-width: 48px;
}

.advantage-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.advantage-body p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ===========================
   Contact
   =========================== */
.contact {
    background: var(--color-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: rgba(37,99,235,0.08);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-light);
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background: var(--color-primary-light);
    color: var(--color-white);
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--color-text-light);
}

.contact-sub {
    font-size: 13px !important;
    color: var(--color-text-light) !important;
    opacity: 0.7;
    margin-top: 2px;
}

.contact-form-wrapper {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.form-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    transition: var(--transition);
    background: var(--color-bg);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-light);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

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

.form-note {
    margin-top: 12px;
    font-size: 14px;
    text-align: center;
    color: var(--color-primary);
    min-height: 20px;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
}

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

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 10px;
    font-size: 14px;
}

.footer-col ul li a {
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 18px;
    text-align: center;
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255,255,255,0.45);
    margin-bottom: 10px;
}

.footer-icp {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
}

.footer-icp a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
}

.footer-icp a:hover {
    color: rgba(255,255,255,0.9);
    text-decoration: underline;
}

.footer-icp-sep {
    margin: 0 12px;
    color: rgba(255,255,255,0.35);
}

.gaba-icon {
    width: 18px;
    height: 20px;
    vertical-align: middle;
    margin-right: 5px;
}

.icp-sep {
    margin: 0 8px;
    color: rgba(255,255,255,0.2);
}

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

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

/* ===========================
   Responsive
   =========================== */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .advantage-list {
        grid-template-columns: 1fr;
    }

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

    .hero-title {
        font-size: 36px;
    }

    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        padding: 80px 24px 24px;
        gap: 4px;
        transition: right 0.3s ease;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu .nav-link {
        color: var(--color-text);
        padding: 14px 16px;
        border-radius: 6px;
    }

    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        background: rgba(37,99,235,0.08);
        color: var(--color-primary-light);
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .capability-grid {
        grid-template-columns: 1fr;
    }

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

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stat-number {
        font-size: 32px;
    }

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

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .category-header {
        flex-direction: column;
        gap: 8px;
    }

    .category-num {
        font-size: 36px;
    }

    .about-image img {
        height: 280px;
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }
}