/* ==========================================================================
   CABIO - 2026 Fresh & Luminous Design System
   "Vẫn xanh nhưng tươi sáng 2026" - Tech-Bio, Radiant Emerald & Modern Glass
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&family=Be+Vietnam+Pro:wght@400;500;600;700;800&display=swap');

:root {
    /* Core Radiant Emerald & Botanical Greens */
    --emerald-50: #ecfdf5;
    --emerald-100: #d1fae5;
    --emerald-200: #a7f3d0;
    --emerald-300: #6ee7b7;
    --emerald-400: #34d399;
    --emerald-500: #10b981;
    --emerald-600: #059669;
    --emerald-700: #047857;
    --emerald-800: #065f46;
    --emerald-900: #064e3b;
    --emerald-950: #022c22;

    /* Fresh Luminous Accents */
    --lime-300: #bef264;
    --lime-400: #a3e635;
    --lime-500: #84cc16;
    --teal-400: #2dd4bf;
    --teal-500: #14b8a6;
    --teal-600: #0d9488;
    --amber-400: #fbbf24;
    --amber-500: #f59e0b;

    /* Primary Semantic Tokens */
    --primary: #10b981;
    --primary-light: #34d399;
    --primary-dark: #059669;
    --primary-glow: rgba(16, 185, 129, 0.35);
    
    --secondary: #065f46;
    --secondary-dark: #064e3b;
    --accent: #84cc16;
    --accent-light: #a3e635;

    /* Neutral & Background Tones (Crisp, Fresh, Luminous Light Mode) */
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-alt: #f0fdf4;
    --bg-subtle: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.92);
    
    /* Typography Colors */
    --text-heading: #0f291e;
    --text-main: #1e293b;
    --text-muted: #475569;
    --text-subtle: #64748b;
    --text-inverse: #ffffff;

    /* Borders & Glass */
    --border-light: rgba(16, 185, 129, 0.12);
    --border-medium: rgba(16, 185, 129, 0.22);
    --border-glass: rgba(255, 255, 255, 0.7);
    --glass-bg: rgba(255, 255, 255, 0.82);
    --glass-blur: blur(20px);

    /* Diffuse Modern 2026 Shadows */
    --shadow-sm: 0 2px 8px rgba(15, 41, 30, 0.04);
    --shadow-md: 0 10px 30px -6px rgba(16, 185, 129, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 20px 45px -10px rgba(16, 185, 129, 0.14), 0 8px 20px -4px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 35px -5px rgba(16, 185, 129, 0.4);
    --shadow-glow-lime: 0 0 30px -5px rgba(163, 230, 53, 0.4);

    /* Radii */
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-xl: 36px;
    --radius-full: 9999px;

    /* Smooth Transitions */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-spring: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

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

body {
    font-family: 'Plus Jakarta Sans', 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main) !important;
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', 'Plus Jakarta Sans', 'Be Vietnam Pro', sans-serif;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.15;
    letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.6rem, 5.5vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 3.8vw, 3.2rem); font-weight: 800; }
h3 { font-size: clamp(1.4rem, 2.4vw, 2rem); font-weight: 700; }
h4 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); font-weight: 700; }

p {
    color: var(--text-muted);
    font-size: 1.02rem;
    line-height: 1.7;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 clamp(18px, 4vw, 40px);
    width: 100%;
}

/* Gradient Text Utility */
.gradient-text {
    background: linear-gradient(135deg, #059669 0%, #10b981 50%, #14b8a6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.gradient-text-lime {
    background: linear-gradient(135deg, #10b981 0%, #84cc16 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* ==========================================================================
   Header & Floating Navigation
   ========================================================================== */

header {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: min(1240px, calc(100% - 32px));
    z-index: 1000;
    padding: 10px 16px 10px 24px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(16, 185, 129, 0.18);
    border-radius: var(--radius-full);
    box-shadow: 0 10px 35px -8px rgba(6, 95, 70, 0.08), 0 4px 12px rgba(0, 0, 0, 0.02);
    transition: var(--transition-smooth);
}

header.scrolled {
    top: 12px;
    background: rgba(255, 255, 255, 0.94);
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: 0 14px 40px -10px rgba(6, 95, 70, 0.14), 0 6px 16px rgba(0, 0, 0, 0.04);
}

header .container {
    padding: 0;
    max-width: 100%;
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 44px;
    width: auto;
    object-fit: contain;
    transition: var(--transition-smooth);
}

.logo:hover img {
    transform: scale(1.04);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(16px, 2.2vw, 34px);
}

.nav-links a {
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--text-heading);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    position: relative;
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--emerald-600);
    background: rgba(16, 185, 129, 0.08);
}

.nav-links a::after {
    display: none;
}

/* Modern 2026 Buttons */
.btn-contact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: 0.94rem;
    font-weight: 700;
    color: #ffffff !important;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-full);
    box-shadow: 0 8px 20px -4px rgba(16, 185, 129, 0.45);
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    transition: var(--transition-spring);
}

.btn-contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
    transition: 0.6s ease;
}

.btn-contact:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 14px 28px -4px rgba(16, 185, 129, 0.55);
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.btn-contact:hover::before {
    left: 100%;
}

.btn-contact i {
    width: 18px;
    height: 18px;
}

/* Secondary Button Outline */
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: 0.94rem;
    font-weight: 700;
    color: var(--emerald-800);
    background: rgba(255, 255, 255, 0.9);
    border: 1.5px solid var(--emerald-400);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.btn-outline:hover {
    background: var(--emerald-50);
    border-color: var(--emerald-600);
    color: var(--emerald-900);
    transform: translateY(-2px);
}

/* ==========================================================================
   Hero Section - Tươi Sáng & Rạng Rỡ 2026
   ========================================================================== */

.hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: 140px 0 80px;
    background: 
        radial-gradient(ellipse at 85% 15%, rgba(52, 211, 153, 0.22) 0%, transparent 60%),
        radial-gradient(ellipse at 15% 75%, rgba(163, 230, 53, 0.18) 0%, transparent 55%),
        radial-gradient(circle at 50% 50%, rgba(240, 253, 244, 0.8) 0%, transparent 100%),
        url('images/hero-redesign-v2.png') center/cover no-repeat;
    isolation: isolate;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(
        105deg,
        rgba(255, 255, 255, 0.97) 0%,
        rgba(255, 255, 255, 0.92) 42%,
        rgba(255, 255, 255, 0.65) 75%,
        rgba(255, 255, 255, 0.2) 100%
    );
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    z-index: 1;
    background: linear-gradient(to top, var(--bg-main), transparent);
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 780px;
}

.hero-content::before {
    content: '🌱 CÔNG NGHỆ HOÀN NGUYÊN ĐẤT 2026 • ĐỘC QUYỀN SỐ 4428';
    display: inline-flex;
    align-items: center;
    margin-bottom: 22px;
    padding: 6px 16px;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.28);
    border-radius: var(--radius-full);
    color: var(--emerald-800);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    box-shadow: 0 2px 10px rgba(16, 185, 129, 0.12);
}

.hero h1 {
    color: var(--text-heading);
    font-size: clamp(2.8rem, 5.8vw, 4.8rem);
    line-height: 1.06;
    letter-spacing: -0.035em;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero p {
    font-size: clamp(1.08rem, 1.6vw, 1.28rem);
    line-height: 1.65;
    color: var(--text-muted);
    max-width: 640px;
    margin-bottom: 36px;
}

.hero-btns {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.hero-btns .btn-contact {
    padding: 14px 34px;
    font-size: 1.05rem;
    box-shadow: 0 12px 30px -4px rgba(16, 185, 129, 0.5);
}

/* ==========================================================================
   Sections General
   ========================================================================== */

.section {
    padding: clamp(75px, 8vw, 120px) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 820px;
    margin: 0 auto clamp(40px, 5vw, 65px);
}

.section-header::before {
    content: 'CABIO • CỘI NGUỒN SỨC SỐNG MỚI';
    display: inline-block;
    margin-bottom: 12px;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--emerald-600);
    background: rgba(16, 185, 129, 0.1);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.section-header h2 {
    color: var(--text-heading);
    margin-bottom: 14px;
    letter-spacing: -0.03em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto;
}

/* Grid Utilities */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(20px, 3vw, 32px);
}

/* ==========================================================================
   Cards (Vision, Mission, Philosophy)
   ========================================================================== */

.card {
    background: var(--bg-surface);
    border: 1px solid rgba(16, 185, 129, 0.14);
    border-radius: var(--radius-lg);
    padding: clamp(28px, 3.5vw, 40px);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    transition: var(--transition-spring);
    display: flex;
    flex-direction: column;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--emerald-400), var(--lime-400));
    opacity: 0;
    transition: var(--transition-smooth);
}

.card::after {
    content: '';
    position: absolute;
    width: 160px;
    height: 160px;
    right: -80px;
    bottom: -80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(52, 211, 153, 0.18) 0%, transparent 70%);
    pointer-events: none;
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(16, 185, 129, 0.35);
    box-shadow: var(--shadow-lg);
}

.card:hover::before {
    opacity: 1;
}

.card:hover::after {
    transform: scale(1.4);
    background: radial-gradient(circle, rgba(163, 230, 53, 0.24) 0%, transparent 70%);
}

.card-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.14) 0%, rgba(163, 230, 53, 0.18) 100%);
    border: 1px solid rgba(16, 185, 129, 0.24);
    color: var(--emerald-700);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    transition: var(--transition-smooth);
}

.card-icon i {
    width: 28px;
    height: 28px;
}

.card:hover .card-icon {
    background: linear-gradient(135deg, var(--emerald-500) 0%, var(--emerald-600) 100%);
    color: #ffffff;
    box-shadow: 0 8px 20px -4px rgba(16, 185, 129, 0.4);
    transform: scale(1.08) rotate(3deg);
}

.card h3 {
    font-size: 1.45rem;
    color: var(--text-heading);
    margin-bottom: 12px;
}

.card p {
    font-size: 0.98rem;
    line-height: 1.65;
    color: var(--text-muted);
}

/* ==========================================================================
   Stats Bar - Luminous Bento 2026
   ========================================================================== */

.stats-bar {
    padding: 0;
    margin: 20px 0 40px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: linear-gradient(135deg, #064e3b 0%, #065f46 50%, #047857 100%);
    border: 1px solid rgba(52, 211, 153, 0.3);
    border-radius: var(--radius-xl);
    padding: clamp(32px, 4vw, 54px) clamp(24px, 3vw, 44px);
    box-shadow: 0 25px 60px -15px rgba(6, 78, 59, 0.35), 0 0 30px rgba(16, 185, 129, 0.15);
    position: relative;
    overflow: hidden;
}

.stats-grid::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(163, 230, 53, 0.2) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.stat-item {
    text-align: center;
    padding: 10px 20px;
    position: relative;
    border-right: 1px solid rgba(255, 255, 255, 0.14);
}

.stat-item:last-child {
    border-right: none;
}

.stat-number {
    display: block;
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.4rem, 4.2vw, 3.8rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, #ffffff 0%, #a7f3d0 60%, #a3e635 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.stat-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(240, 253, 244, 0.85);
}

/* ==========================================================================
   Product Strategy Layers (Thô - Vừa - Tinh)
   ========================================================================== */

#product-layers {
    background: linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%) !important;
}

.layer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.layer-card {
    background: #ffffff;
    border: 1.5px solid rgba(16, 185, 129, 0.16);
    border-radius: var(--radius-lg);
    padding: clamp(30px, 3.5vw, 42px);
    box-shadow: var(--shadow-md);
    position: relative;
    display: flex;
    flex-direction: column;
    transition: var(--transition-spring);
}

.layer-card:hover {
    transform: translateY(-10px);
    border-color: var(--emerald-400);
    box-shadow: var(--shadow-lg);
}

.layer-tag {
    display: inline-block;
    align-self: flex-start;
    padding: 6px 16px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.layer-card h4 {
    font-size: 1.6rem;
    color: var(--text-heading);
    margin-bottom: 12px;
}

.layer-card p {
    font-size: 0.98rem;
    color: var(--text-muted);
    margin-bottom: 22px;
}

.layer-list {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 18px;
    border-top: 1px dashed rgba(16, 185, 129, 0.2);
}

.layer-list li {
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px;
}

.layer-list li::before {
    content: '✓';
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--emerald-100);
    color: var(--emerald-700);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
    flex-shrink: 0;
}

/* ==========================================================================
   Detailed Solutions Sections
   ========================================================================== */

.solution {
    background: #ffffff;
}

.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: clamp(40px, 6vw, 90px);
    align-items: center;
    margin-bottom: clamp(70px, 9vw, 110px);
}

.solution-grid:last-child {
    margin-bottom: 0;
}

.solution-grid.reverse {
    grid-template-columns: 1.15fr 1fr;
}

.solution-grid.reverse .solution-image {
    order: 2;
}

.solution-grid.reverse .solution-content {
    order: 1;
}

.solution-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 20px 45px -10px rgba(6, 78, 59, 0.16);
    border: 1px solid rgba(16, 185, 129, 0.18);
    transition: var(--transition-smooth);
    background: var(--emerald-50);
}

.solution-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.4);
    pointer-events: none;
}

.solution-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.solution-grid:hover .solution-image img {
    transform: scale(1.04);
}

.product-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.25);
    color: var(--emerald-700);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: 14px;
}

.solution-content h3 {
    font-size: clamp(2rem, 3.2vw, 2.8rem);
    line-height: 1.15;
    color: var(--text-heading);
    margin-bottom: 16px;
}

.solution-content > p {
    font-size: 1.08rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.solution-detail-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.solution-detail-list li {
    font-size: 1rem;
    color: var(--text-main);
    line-height: 1.6;
    padding-left: 28px;
    position: relative;
}

.solution-detail-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--emerald-400), var(--lime-400));
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.6);
}

.solution-detail-list li strong {
    color: var(--emerald-900);
    font-weight: 700;
}

/* Featured Video Box */
.featured-video-box {
    background: #ffffff !important;
    border: 1.5px solid rgba(16, 185, 129, 0.2) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: 0 20px 50px -10px rgba(6, 78, 59, 0.12) !important;
    transition: var(--transition-smooth);
}

/* ==========================================================================
   Founder Aspiration ("Khao Khát CABIO") - Aurora Forest 2026
   ========================================================================== */

.quote-section {
    position: relative;
    padding: clamp(80px, 9vw, 130px) 0;
    background: linear-gradient(145deg, #064e3b 0%, #065f46 50%, #0d9488 100%) !important;
    color: #ffffff !important;
    overflow: hidden;
}

.quote-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at top right, rgba(163, 230, 53, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse at bottom left, rgba(45, 212, 191, 0.22) 0%, transparent 50%);
    pointer-events: none;
}

.quote-section p {
    color: #f1f5f9 !important;
    font-size: 1.05rem;
    line-height: 1.7;
}

.quote-section strong {
    color: #ffffff !important;
    font-weight: 700;
}

.quote-section em {
    color: #e2e8f0 !important;
}

.quote-box {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: clamp(28px, 4vw, 44px);
    color: #ffffff;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
}

.quote-item-badge {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    font-weight: 800;
    min-width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.5);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
}

/* ==========================================================================
   Activities Standalone Page Hero
   ========================================================================== */

.activities-hero {
    position: relative;
    padding: 160px 0 80px;
    text-align: center;
    background: 
        radial-gradient(ellipse at 80% 20%, rgba(52, 211, 153, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse at 20% 80%, rgba(163, 230, 53, 0.18) 0%, transparent 55%),
        linear-gradient(180deg, #f0fdf4 0%, #f8fafc 100%);
    border-bottom: 1px solid rgba(16, 185, 129, 0.15);
}

.activities-hero::before {
    content: '🌱 KÊNH TRUYỀN THÔNG & HOẠT ĐỘNG THỰC TẾ 2026';
    display: inline-flex;
    align-items: center;
    margin-bottom: 18px;
    padding: 6px 18px;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.28);
    border-radius: var(--radius-full);
    color: var(--emerald-800);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.activities-hero h1 {
    font-size: clamp(2.4rem, 4.8vw, 3.8rem);
    color: var(--text-heading);
    margin-bottom: 16px;
    letter-spacing: -0.03em;
}

.activities-hero p {
    font-size: clamp(1.05rem, 1.6vw, 1.25rem);
    color: var(--text-muted);
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.65;
}

/* ==========================================================================
   Gallery Section
   ========================================================================== */

.gallery {
    background: #ffffff;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gallery-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(16, 185, 129, 0.15);
    background: var(--emerald-50);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.08);
}

/* ==========================================================================
   Certificates & Legal Section
   ========================================================================== */

#certificates {
    background: linear-gradient(180deg, #f8fafc 0%, #f0fdf4 100%) !important;
}

/* ==========================================================================
   Values Section (8 Giá Trị Cốt Lõi)
   ========================================================================== */

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.value-item {
    background: #ffffff;
    border: 1px solid rgba(16, 185, 129, 0.14);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-spring);
}

.value-item:hover {
    transform: translateY(-6px);
    border-color: var(--emerald-400);
    box-shadow: var(--shadow-md);
}

.value-item h4 {
    font-size: 1.25rem;
    color: var(--emerald-800);
    margin-bottom: 8px;
}

.value-item p {
    font-size: 0.92rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Technical Usage Guide (Tabs)
   ========================================================================== */

.usage-tabs-container {
    max-width: 960px;
    margin: 0 auto;
}

.usage-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 34px;
    flex-wrap: wrap;
}

.usage-tab {
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-heading);
    background: #ffffff;
    border: 1.5px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.usage-tab:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-700);
}

.usage-tab.active {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 8px 20px -4px rgba(16, 185, 129, 0.4);
}

.usage-content-wrapper {
    background: #ffffff;
    border: 1.5px solid rgba(16, 185, 129, 0.18);
    border-radius: var(--radius-xl);
    padding: clamp(30px, 4vw, 48px);
    box-shadow: var(--shadow-md);
}

.usage-content {
    display: none;
}

.usage-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

.usage-content h4 {
    font-size: 1.45rem;
    color: var(--emerald-800);
    margin-bottom: 18px;
}

.usage-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.usage-list li {
    font-size: 1.02rem;
    color: var(--text-main);
    line-height: 1.65;
    padding-left: 26px;
    position: relative;
}

.usage-list li::before {
    content: '•';
    color: var(--emerald-500);
    font-size: 1.6rem;
    position: absolute;
    left: 8px;
    top: -2px;
}

.plants-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 20px 0;
}

.plant-item {
    background: var(--emerald-50);
    border: 1px solid rgba(16, 185, 129, 0.16);
    border-radius: var(--radius-md);
    padding: 20px;
}

.plant-item h5 {
    font-size: 1.15rem;
    color: var(--emerald-900);
    margin-bottom: 6px;
}

.usage-note {
    background: #fefce8;
    border-left: 4px solid #eab308;
    padding: 14px 18px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-top: 20px;
    font-size: 0.95rem;
    color: #713f12;
}

/* ==========================================================================
   YouTube Videos Grid
   ========================================================================== */

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.video-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(16, 185, 129, 0.16);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-spring);
    display: flex;
    flex-direction: column;
}

.video-card:hover {
    transform: translateY(-8px);
    border-color: var(--emerald-400);
    box-shadow: var(--shadow-lg);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    background: #000;
}

.video-wrapper iframe,
.video-wrapper lite-youtube {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.video-date {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--emerald-600);
    margin-bottom: 8px;
}

.video-title {
    font-size: 1.08rem;
    color: var(--text-heading);
    line-height: 1.4;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--emerald-700);
}

.video-link:hover {
    color: var(--emerald-500);
    transform: translateX(4px);
}

.section-footer {
    text-align: center;
    margin-top: 50px;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */

.faq-accordion {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: #ffffff;
    border: 1.5px solid rgba(16, 185, 129, 0.16);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.faq-item:hover {
    border-color: var(--emerald-400);
}

.faq-item.active {
    border-color: var(--emerald-500);
    box-shadow: var(--shadow-md);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text-heading);
    user-select: none;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--emerald-700);
}

.faq-question i {
    width: 22px;
    height: 22px;
    color: var(--emerald-600);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    background: var(--emerald-50);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 24px 20px;
}

.faq-answer p {
    font-size: 1rem;
    color: var(--text-main);
    line-height: 1.7;
    margin: 0;
}

/* ==========================================================================
   Footer - Fresh Forest Tone
   ========================================================================== */

footer {
    background: linear-gradient(145deg, #064e3b 0%, #065f46 100%);
    color: #ffffff;
    padding: 80px 0 30px;
    margin-top: auto;
    position: relative;
    border-top: 2px solid rgba(52, 211, 153, 0.25);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.3fr;
    gap: clamp(30px, 5vw, 60px);
    margin-bottom: 60px;
}

.footer-brand img {
    height: 48px;
    margin-bottom: 20px;
}

.footer-brand p {
    color: rgba(240, 253, 244, 0.82);
    font-size: 0.96rem;
    line-height: 1.65;
}

.footer-links h4 {
    color: #ffffff;
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 36px;
    height: 3px;
    background: var(--lime-400);
    border-radius: var(--radius-full);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a,
.footer-links li {
    color: rgba(240, 253, 244, 0.8);
    font-size: 0.94rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--lime-300);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.9rem;
    color: rgba(240, 253, 244, 0.7);
}

.footer-bottom a {
    color: var(--lime-300);
    font-weight: 600;
}

/* ==========================================================================
   Floating Action Buttons
   ========================================================================== */

.floating-contacts {
    position: fixed;
    bottom: 28px;
    right: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    z-index: 999;
}

.float-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: var(--radius-full);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.94rem;
    box-shadow: 0 10px 25px -4px rgba(0, 0, 0, 0.25);
    transition: var(--transition-spring);
}

.float-call {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: 1.5px solid rgba(255, 255, 255, 0.35);
}

.float-zalo {
    background: linear-gradient(135deg, #0088ff 0%, #0066cc 100%);
    border: 1.5px solid rgba(255, 255, 255, 0.35);
}

.float-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 16px 30px -4px rgba(0, 0, 0, 0.35);
}

/* ==========================================================================
   Reveal Animations
   ========================================================================== */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .stat-item {
        border-right: none;
    }
    
    .stat-item:nth-child(1),
    .stat-item:nth-child(3) {
        border-right: 1px solid rgba(255, 255, 255, 0.14);
    }
    
    .layer-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-grid,
    .solution-grid.reverse {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .solution-grid.reverse .solution-image {
        order: 1;
    }
    
    .solution-grid.reverse .solution-content {
        order: 2;
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    header {
        top: 10px;
        width: calc(100% - 20px);
        padding: 8px 14px;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        min-height: 85vh;
        padding: 120px 0 60px;
        text-align: center;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-content::before {
        font-size: 0.72rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        border-radius: var(--radius-lg);
    }
    
    .stat-item:nth-child(1),
    .stat-item:nth-child(3) {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        padding-bottom: 20px;
    }
    
    .stat-item:nth-child(2) {
        border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        padding-bottom: 20px;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .plants-grid {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .floating-contacts {
        bottom: 16px;
        right: 16px;
    }
    
    .float-btn span {
        display: none;
    }
    
    .float-btn {
        padding: 12px;
        border-radius: 50%;
    }
    
    .show-desktop {
        display: none !important;
    }
    
    .show-mobile {
        display: block !important;
    }
}