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

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --accent: #ff6d00;
    --dark: #1a1a2e;
    --dark2: #16213e;
    --gray-900: #212121;
    --gray-700: #555;
    --gray-500: #888;
    --gray-300: #ddd;
    --gray-100: #f5f5f5;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0,0,0,.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: .3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--gray-900);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255,255,255,.97);
    border-bottom-color: var(--gray-300);
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon { font-size: 1.5rem; }

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: .95rem;
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition);
    position: relative;
}

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

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-900);
    transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #0f0c29 0%, #1a1a3e 40%, #24243e 100%);
    color: var(--white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(26,115,232,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(26,115,232,.08) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

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

.hero-badge {
    display: inline-block;
    background: rgba(26,115,232,.2);
    border: 1px solid rgba(26,115,232,.3);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: .9rem;
    margin-bottom: 24px;
    animation: fadeInUp .8s ease;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    animation: fadeInUp .8s ease .1s both;
}

.highlight {
    background: linear-gradient(90deg, var(--primary), #00c6ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.15rem;
    color: rgba(255,255,255,.75);
    max-width: 600px;
    margin-bottom: 36px;
    animation: fadeInUp .8s ease .2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    animation: fadeInUp .8s ease .3s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,115,232,.35);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,.4);
}

.btn-outline:hover {
    background: rgba(255,255,255,.1);
    border-color: var(--white);
    transform: translateY(-2px);
}

.btn-full { width: 100%; }

.hero-stats {
    display: flex;
    gap: 48px;
    animation: fadeInUp .8s ease .4s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(90deg, #00c6ff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: .85rem;
    color: rgba(255,255,255,.5);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Sections ===== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: .85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--dark);
}

.section-header p {
    font-size: 1.05rem;
    color: var(--gray-500);
}

/* ===== Products ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    position: relative;
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
}

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

.product-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--white) 40%);
}

.card-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--accent);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: .75rem;
    font-weight: 600;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.product-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.card-desc {
    color: var(--gray-500);
    font-size: .92rem;
    margin-bottom: 20px;
}

.card-features {
    margin-bottom: 24px;
}

.card-features li {
    padding: 6px 0;
    font-size: .9rem;
    color: var(--gray-700);
    position: relative;
    padding-left: 20px;
}

.card-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.card-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    font-weight: 600;
    font-size: .95rem;
    transition: var(--transition);
}

.card-link:hover {
    gap: 8px;
}

/* ===== Brands ===== */
.brands {
    background: var(--gray-100);
    padding: 60px 0;
}

.brand-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.brand-item {
    background: var(--white);
    padding: 16px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    transition: var(--transition);
    font-size: .95rem;
}

.brand-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: var(--shadow);
}

/* ===== Advantages ===== */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.adv-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius);
    background: var(--white);
    border: 1px solid var(--gray-300);
    transition: var(--transition);
}

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

.adv-num {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-light);
    background: linear-gradient(180deg, var(--primary), rgba(26,115,232,.2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.adv-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.adv-card p {
    font-size: .9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ===== Cases ===== */
.cases {
    background: var(--gray-100);
}

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

.case-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--gray-300);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.case-tag {
    display: inline-block;
    font-size: .85rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.case-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.case-card p {
    font-size: .9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ===== Process ===== */
.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.step {
    text-align: center;
    flex: 0 1 200px;
}

.step-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    font-size: 1.3rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.step p {
    font-size: .85rem;
    color: var(--gray-500);
}

.step-arrow {
    font-size: 1.5rem;
    color: var(--gray-300);
    margin-top: 18px;
}

/* ===== Contact ===== */
.contact {
    background: var(--gray-100);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-form {
    background: var(--white);
    padding: 36px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: .9rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: .95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,115,232,.12);
}

.form-group textarea {
    resize: vertical;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-300);
    transition: var(--transition);
}

.info-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.info-icon {
    font-size: 1.6rem;
    flex-shrink: 0;
}

.info-card h4 {
    font-size: .95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.info-card p {
    font-size: .9rem;
    color: var(--gray-700);
}

.info-note {
    font-size: .8rem !important;
    color: var(--gray-500) !important;
    margin-top: 2px;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}

.footer-brand p {
    margin-top: 12px;
    font-size: .9rem;
    line-height: 1.6;
}

.footer-links h4 {
    color: var(--white);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.footer-links a {
    font-size: .9rem;
    color: rgba(255,255,255,.5);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: .85rem;
}

.footer-bottom a {
    color: rgba(255,255,255,.4);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--dark);
    color: var(--white);
    padding: 16px 28px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    font-size: .95rem;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .product-grid { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        box-shadow: var(--shadow);
    }

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

    .hero h1 { font-size: 2rem; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }
    .stat-num { font-size: 1.5rem; }

    .section { padding: 60px 0; }
    .section-header h2 { font-size: 1.7rem; }

    .adv-grid { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: 1fr; }

    .contact-wrapper { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .process-steps { flex-direction: column; align-items: center; }
    .step-arrow { transform: rotate(90deg); }

    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}