/* ============ Reset & Base ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --accent: #7c3aed;
    --bg-dark: #0a0e1a;
    --bg-card: #111827;
    --text: #e5e7eb;
    --text-muted: #9ca3af;
    --border: rgba(255,255,255,0.08);
    --gradient: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
}
html { scroll-behavior: smooth; }
body {
    font-family: "Segoe UI", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ Navbar ============ */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 0; transition: all 0.3s;
    background: transparent;
}
.navbar.scrolled {
    background: rgba(10,14,26,0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: baseline; gap: 8px; }
.logo-icon { color: var(--primary); font-size: 1.4rem; }
.logo-text { font-size: 1.3rem; font-weight: 700; color: #fff; }
.logo-en { font-size: 0.7rem; color: var(--text-muted); letter-spacing: 2px; }
.nav-menu { display: flex; gap: 28px; }
.nav-link {
    font-size: 0.9rem; color: var(--text-muted); transition: color 0.2s;
    position: relative; padding: 4px 0;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
    background: var(--gradient); transition: width 0.3s;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; transition: 0.3s; }

/* ============ Hero ============ */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg canvas { width: 100%; height: 100%; }
.hero-content { position: relative; z-index: 2; text-align: center; padding: 0 24px; }
.hero-title {
    font-size: clamp(2rem, 5vw, 3.8rem); font-weight: 800; color: #fff;
    background: var(--gradient); -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}
.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.4rem); color: var(--text-muted);
    margin-bottom: 32px; animation: fadeInUp 1s ease 0.2s both;
}
.hero-tags { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; animation: fadeInUp 1s ease 0.4s both; }
.hero-tag {
    padding: 6px 16px; border: 1px solid var(--border); border-radius: 20px;
    font-size: 0.8rem; color: var(--text-muted); background: rgba(255,255,255,0.03);
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; animation: fadeInUp 1s ease 0.6s both; }
.scroll-hint { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 2; }
.scroll-arrow {
    display: block; width: 24px; height: 40px; border: 2px solid var(--text-muted);
    border-radius: 12px; position: relative;
}
.scroll-arrow::after {
    content: ''; position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
    width: 4px; height: 8px; background: var(--primary); border-radius: 2px;
    animation: scrollDown 2s infinite;
}

/* ============ Buttons ============ */
.btn {
    display: inline-block; padding: 12px 32px; border-radius: 8px; font-size: 0.95rem;
    font-weight: 600; cursor: pointer; transition: all 0.3s; border: none;
}
.btn-primary {
    background: var(--gradient); color: #fff;
    box-shadow: 0 4px 20px rgba(0,212,255,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(0,212,255,0.4); }
.btn-outline {
    background: transparent; color: var(--text); border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-full { width: 100%; }

/* ============ Sections ============ */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    font-size: 0.75rem; letter-spacing: 3px; color: var(--primary);
    text-transform: uppercase; margin-bottom: 12px; display: block;
}
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; color: #fff; }
.section-line {
    width: 60px; height: 3px; background: var(--gradient); margin: 16px auto 0;
    border-radius: 2px;
}

/* ============ About ============ */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; }
.about-text p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 30px; }
.about-mission { display: flex; flex-direction: column; gap: 20px; }
.mission-item { display: flex; gap: 16px; align-items: flex-start; }
.mission-icon { font-size: 1.8rem; }
.mission-item h4 { color: #fff; margin-bottom: 4px; }
.mission-item p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.stat-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
    padding: 30px 20px; text-align: center; transition: transform 0.3s, border-color 0.3s;
}
.stat-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.stat-number { font-size: 2.5rem; font-weight: 800; color: var(--primary); }
.stat-unit { font-size: 1.2rem; color: var(--text-muted); }
.stat-label { display: block; margin-top: 4px; color: var(--text-muted); font-size: 0.85rem; }

/* ============ News ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
    overflow: hidden; transition: transform 0.3s, border-color 0.3s;
}
.news-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.news-date { padding: 12px 20px; font-size: 0.8rem; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.news-body { padding: 20px; }
.news-body h4 { color: #fff; margin-bottom: 10px; font-size: 1.05rem; }
.news-body p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.6; }

/* ============ Business ============ */
.business-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.business-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
    padding: 36px 24px; text-align: center; transition: all 0.3s; position: relative; overflow: hidden;
}
.business-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient); transform: scaleX(0); transition: transform 0.3s;
}
.business-card:hover::before { transform: scaleX(1); }
.business-card:hover { transform: translateY(-4px); border-color: rgba(0,212,255,0.3); }
.business-icon { font-size: 2.5rem; margin-bottom: 16px; }
.business-card h4 { color: #fff; margin-bottom: 12px; font-size: 1.1rem; }
.business-card p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.6; }

/* ============ Solutions ============ */
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
    padding: 30px 24px; transition: all 0.3s;
}
.solution-card:hover { border-color: var(--primary); transform: translateY(-3px); }
.solution-card h4 { color: #fff; margin-bottom: 10px; font-size: 1.05rem; display: flex; align-items: center; gap: 10px; }
.solution-card p { color: var(--text-muted); font-size: 0.88rem; }

/* ============ Cases ============ */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
    overflow: hidden; transition: all 0.3s;
}
.case-card:hover { border-color: var(--primary); transform: translateY(-4px); }
 case-img {
    height: 160px; background: linear-gradient(135deg, #1a1a3e, #0f3460);
    display: flex; align-items: center; justify-content: center; font-size: 3rem;
}
.case-body { padding: 20px; }
.case-body h4 { color: #fff; margin-bottom: 8px; }
.case-meta { display: flex; gap: 12px; margin-bottom: 10px; }
.case-meta span { font-size: 0.78rem; color: var(--primary); background: rgba(0,212,255,0.1); padding: 2px 10px; border-radius: 10px; }
.case-body p { color: var(--text-muted); font-size: 0.85rem; }

/* ============ Service ============ */
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-item {
    text-align: center; padding: 30px 20px; border-radius: 16px;
    background: var(--bg-card); border: 1px solid var(--border); transition: all 0.3s;
}
.service-item:hover { border-color: var(--primary); }
.service-icon { font-size: 2.5rem; margin-bottom: 16px; }
.service-item h4 { color: #fff; margin-bottom: 10px; }
.service-item p { color: var(--text-muted); font-size: 0.85rem; }

/* ============ Contact ============ */
.contact-grid { display: grid: grid-template-columns: 1fr 1.2fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon { font-size: 1.5rem; }
.contact-item h4 { color: #fff; margin-bottom: 4px; }
.contact-item p { color: var(--text-muted); }
.contact-form {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 36px;
}
.contact-form h3 { color: #fff; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.contact-form input, .contact-form textarea {
    width: 100%; padding: 12px 16px; background: rgba(255,255,255,0.05);
    border: 1px solid var(--border); border-radius: 8px; color: var(--text);
    font-size: 0.9rem; transition: border-color 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none; border-color: var(--primary);
}
.contact-form textarea { margin-bottom: 16px; resize: vertical; }
.form-msg { margin-top: 12px; font-size: 0.85rem; text-align: center; }
.form-msg.success { color: #4ade80; }
.form-msg.error { color: #f87171; }

/* ============ Footer ============ */
.footer {
    padding: 40px 0; border-top: 1px solid var(--border);
    background: rgba(0,0,0,0.2);
}
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-desc { color: var(--text-muted); font-size: 0.85rem; margin-top: 8px; }
.footer-right p { color: var(--text-muted); font-size: 0.82rem; }
.footer-icp { margin-top: 6px; }
.footer-icp a { color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.footer-icp a:hover { color: var(--primary); }
.footer-admin { color: var(--text-muted); font-size: 0.82rem; margin-left: 12px; transition: color 0.2s; }
.footer-admin:hover { color: var(--primary); }

/* ============ Animations ============ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes scrollDown {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: 0.3; }
}
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s, transform 0.6s; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .business-grid { grid-template-columns: repeat(2, 1fr); }
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .nav-menu {
        position: fixed; top: 60px; left: 0; right: 0;
        background: rgba(10,14,26,0.98); flex-direction: column;
        padding: 20px; gap: 16px; transform: translateY(-150%); transition: transform 0.3s;
        border-bottom: 1px solid var(--border);
    }
    .nav-menu.open { transform: translateY(0); }
    .nav-toggle { display: flex; }
    .news-grid, .solutions-grid, .cases-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .section { padding: 60px 0; }
}