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

:root {
    --primary: #0d6e3f;
    --primary-dark: #094d2c;
    --primary-light: #e8f5ee;
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --text: #1a1a2e;
    --text-light: #64748b;
    --white: #ffffff;
    --bg: #f8fafc;
    --card-shadow: 0 4px 24px rgba(0,0,0,0.08);
    --card-hover-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* HEADER */
header {
    background: var(--white);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.95);
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo svg { width: 36px; height: 36px; }
.logo span { color: var(--accent); }
nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s;
}
nav a:hover { background: var(--primary-light); color: var(--primary); }

/* HERO */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #10b981 100%);
    color: var(--white);
    padding: 80px 24px 100px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(245,158,11,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    text-align: center;
}
.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}
.hero h1 em {
    font-style: normal;
    color: var(--accent);
}
.hero p {
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto 40px;
    opacity: 0.9;
    line-height: 1.7;
}
.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: var(--text);
    font-weight: 700;
    padding: 16px 36px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 1.05rem;
    transition: all 0.3s;
    box-shadow: 0 4px 20px rgba(245,158,11,0.4);
}
.hero-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(245,158,11,0.5);
}
.hero-cta svg { width: 20px; height: 20px; }

/* FEATURES BAR */
.features-bar {
    max-width: 1200px;
    margin: -50px auto 0;
    padding: 0 24px;
    position: relative;
    z-index: 10;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    background: var(--white);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
}
.feature-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 8px;
}
.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.feature-icon svg { width: 24px; height: 24px; color: var(--primary); }
.feature-item h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 2px; }
.feature-item p { font-size: 0.8rem; color: var(--text-light); }

/* PRODUCT SECTION */
.product-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
}
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header .tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 16px;
}
.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}
.section-header p {
    color: var(--text-light);
    font-size: 1.05rem;
    max-width: 550px;
    margin: 0 auto;
}

.product-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.3s;
}
.product-card:hover { box-shadow: var(--card-hover-shadow); }

.product-images { position: relative; }
.product-img-main {
    width: 100%;
    border-radius: 16px;
    background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.product-img-main img {
    max-width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: contain;
    transition: transform 0.4s;
}
.product-img-main:hover img { transform: scale(1.05); }

.product-thumbs {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}
.product-thumbs img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 6px;
    cursor: pointer;
    transition: border-color 0.2s;
    background: var(--white);
}
.product-thumbs img:hover,
.product-thumbs img.active { border-color: var(--primary); }

.product-info h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}
.product-brand {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 16px;
}
.product-brand svg { width: 16px; height: 16px; }
.product-price {
    font-size: 2rem;
    font-weight: 800;
    color: #dc2626;
    margin-bottom: 20px;
}
.product-price small {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-light);
    display: block;
    margin-top: 4px;
}

.speed-options { margin-bottom: 24px; }
.speed-options label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}
.speed-btns { display: flex; gap: 10px; }
.speed-btn {
    padding: 10px 24px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text);
}
.speed-btn:hover { border-color: var(--primary); color: var(--primary); }
.speed-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.product-specs {
    list-style: none;
    margin-bottom: 28px;
}
.product-specs li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 0.95rem;
    border-bottom: 1px solid #f1f5f9;
}
.product-specs li svg { width: 18px; height: 18px; color: var(--primary); flex-shrink: 0; }

.btn-detail {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--primary);
    color: var(--white);
    font-weight: 700;
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 0 4px 16px rgba(13,110,63,0.3);
}
.btn-detail:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(13,110,63,0.4);
}
.btn-detail svg { width: 20px; height: 20px; }

/* WHY US */
.why-section {
    background: var(--white);
    padding: 80px 24px;
}
.why-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.why-card {
    padding: 32px;
    border-radius: 16px;
    background: var(--bg);
    border: 1px solid #e2e8f0;
    transition: all 0.3s;
}
.why-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(13,110,63,0.1);
}
.why-card-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.why-card-icon svg { width: 28px; height: 28px; color: var(--primary); }
.why-card h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.why-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

/* FOOTER */
footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: 60px 24px 32px;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo { color: var(--white); font-size: 1.3rem; margin-bottom: 16px; }
.footer-brand p { opacity: 0.8; font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
footer h5 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
    color: var(--white);
    opacity: 0.75;
    text-decoration: none;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}
.footer-links a:hover { opacity: 1; }
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    opacity: 0.85;
}
.footer-contact svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.7; }
.footer-contact a { color: inherit; text-decoration: none; opacity: 0.85; transition: opacity 0.2s; }
.footer-contact a:hover { opacity: 1; text-decoration: underline; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.15);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .product-card { grid-template-columns: 1fr; padding: 24px; }
    .footer-top { grid-template-columns: 1fr; gap: 32px; }
    .header-inner { height: 60px; }
    nav { display: none; }
    .hero { padding: 60px 24px 80px; }
}