/* ==========================================================================
   vnbusiness.vn Interactive Scrollytelling / E-Magazine Stylesheet
   Style: Bloomberg - Financial Times - VnExpress Premium
   ========================================================================== */

/* --- CSS Variables / Design Tokens --- */
:root {
    --font-heading: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Colors */
    --color-bg: #FCFCF9;
    --color-surface: #FFFFFF;
    --color-surface-alt: #F4F6F4;
    --color-surface-mint: #EBF7F0;

    --color-primary: #1E8E5A;
    --color-primary-dark: #12633E;
    --color-primary-light: #E2F4EB;

    --color-accent-gold: #D97706;
    --color-accent-gold-light: #FEF3C7;

    --color-accent-orange: #E07A5F;
    --color-accent-blue: #2563EB;

    --color-text-main: #036435;
    --color-text-body: #000000;
    --color-text-muted: #202732;

    --color-border: #E2E8F0;
    --color-border-accent: rgba(30, 142, 90, 0.25);

    --box-shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
    --box-shadow-hover: 0 20px 40px -10px rgba(30, 142, 90, 0.15);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--color-bg);
    color: var(--color-text-body);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

body {
    line-height: 1.8;
    overflow-x: hidden;
}

/* Container Utility */
.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

.article-container {
    width: 100%;
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- TITLE SECTION (NO HERO IMAGE - TYPOGRAPHY & ANIMATED CANVAS) --- */
.title-section {
    position: relative;
    padding-top: 60px;
    padding-bottom: 70px;
    background: linear-gradient(180deg, #F5F9F6 0%, #FCFCF9 100%);
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

#networkCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.title-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.7) 0%, rgba(252, 252, 249, 0.95) 100%);
    z-index: 2;
}

.title-container {
    position: relative;
    z-index: 3;
    text-align: center;
}

.topic-meta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
}

.meta-tag {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-primary);
}

.meta-separator {
    color: var(--color-text-muted);
}

.meta-date {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.main-title {
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 4.8vw, 3.8rem);
    font-weight: 800;
    line-height: 1.22;
    color: var(--color-text-main);
    letter-spacing: -1px;
    margin-bottom: 28px;
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
}

.title-highlight {
    background: linear-gradient(120deg, var(--color-primary) 0%, #15803D 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: inline-block;
}

.title-decor-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.decor-line {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-gold));
    border-radius: 2px;
}

.decor-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-primary);
}

/* --- SAPO & VALUE CHAIN SECTION --- */
.sapo-section {
    padding: 60px 0;
    background-color: var(--color-bg);
}

.grid-sapo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    align-items: stretch;
}

.sapo-card-wrapper {
    background: var(--color-surface);
    border-left: 5px solid var(--color-primary);
    padding: 36px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    box-shadow: var(--box-shadow-card);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.sapo-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.sapo-text {
    font-family: var(--font-body);
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.75;
    color: var(--color-text-main);
}

/* Value Chain Flow Box */
.value-chain-wrapper {
    background: linear-gradient(145deg, #113A27, #0B2519);
    color: #FFF;
    padding: 36px;
    border-radius: var(--radius-md);
    box-shadow: 0 12px 36px rgba(17, 58, 39, 0.25);
    display: flex;
    flex-direction: column;
}

.chain-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-accent-gold-light);
    letter-spacing: 1px;
    margin-bottom: 24px;
    text-align: center;
    text-transform: uppercase;
}

.interactive-chain {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chain-step {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(255, 255, 255, 0.06);
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.chain-step.active {
    background: rgba(30, 142, 90, 0.3);
    border-color: var(--color-primary);
    box-shadow: 0 0 15px rgba(30, 142, 90, 0.4);
    transform: translateX(6px);
}

.step-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-gold);
    flex-shrink: 0;
}

.chain-step.active .step-icon {
    background: var(--color-primary);
    color: #FFF;
}

.step-content {
    display: flex;
    flex-direction: column;
}

.step-name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    /* 19.2px bold */
    font-weight: 800;
    color: #FFF;
}

.step-desc {
    font-size: 1.125rem;
    /* 18px */
    color: rgba(255, 255, 255, 0.85);
}

.chain-arrow {
    text-align: center;
    color: rgba(255, 255, 255, 0.3);
    line-height: 1;
}

.chain-step.active+.chain-arrow {
    color: var(--color-primary);
}

/* --- ARTICLE BODY CONTENT --- */
.article-body {
    padding-bottom: 20px;
}

.content-section {
    padding: 40px 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.3rem);
    font-weight: 800;
    color: var(--color-text-main);
    line-height: 1.3;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 16px;
    letter-spacing: -0.5px;
}

.sec-number {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
}

.body-p {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.85;
    color: var(--color-text-body);
    margin-bottom: 28px;
}

/* --- INFOGRAPHIC WIDE CONTAINER (PERFECTLY CENTERED, BULLETPROOF) --- */
.infographic-container {
    width: 100%;
    max-width: 1140px;
    margin: 48px auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.infographic-box {
    width: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--box-shadow-card);
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

.infographic-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-gold));
}

.info-header {
    margin-bottom: 36px;
}

.info-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 1.15rem;
    /* >= 18px */
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 1.5px;
    margin-bottom: 8px;
}

.info-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    /* 28px bold */
    font-weight: 800;
    color: var(--color-text-main);
    line-height: 1.3;
    margin-bottom: 8px;
}

.info-subtitle {
    font-size: 1.15rem;
    /* >= 18px */
    color: var(--color-text-muted);
}

/* INFOGRAPHIC 1: Horizontal Flow */
.horizontal-flow-wrapper {
    position: relative;
    padding: 24px 0;
}

.flow-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.flow-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    min-width: 120px;
    padding: 10px 4px;
}

.node-icon-circle {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--color-surface-alt);
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
}

.flow-node:hover .node-icon-circle {
    background: var(--color-primary);
    color: #FFF;
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(30, 142, 90, 0.3);
}

.accent-node {
    background: var(--color-accent-gold-light);
    border-color: var(--color-accent-gold);
    color: var(--color-accent-gold);
}

.final-node {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* INFOGRAPHIC FONT RULES: ALL TEXT INSIDE INFOGRAPHICS >= 18px */
.node-label {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    /* 19.2px bold */
    font-weight: 800;
    color: var(--color-text-main);
    line-height: 1.3;
}

.node-sub {
    font-size: 1.125rem;
    /* 18px bold */
    font-weight: 700;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.flow-arrow-icon {
    color: var(--color-primary);
    opacity: 0.6;
    flex-shrink: 0;
}

/* INFOGRAPHIC 2: Timeline Cards & Stats (NO OVERLAP) */
.timeline-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 36px;
    align-items: start;
}

.timeline-vertical {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.time-item {
    position: relative;
    background: var(--color-surface-alt);
    padding: 24px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    transition: transform 0.3s ease, background 0.3s ease;
}

.time-item:hover {
    transform: translateX(4px);
    background: var(--color-surface-mint);
}

.time-badge {
    display: inline-block;
    background: var(--color-primary);
    color: #FFF;
    font-family: var(--font-heading);
    font-size: 1.125rem;
    /* 18px bold */
    font-weight: 800;
    padding: 6px 14px;
    border-radius: 14px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(30, 142, 90, 0.2);
}

.time-content h4 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    /* 20.8px bold */
    font-weight: 800;
    color: var(--color-text-main);
    margin-bottom: 8px;
    line-height: 1.3;
}

.time-content p {
    font-size: 1.125rem;
    /* 18px */
    color: var(--color-text-body);
    margin-bottom: 14px;
    line-height: 1.65;
}

.time-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.t-icon {
    font-size: 1.125rem;
    /* 18px bold */
    font-weight: 700;
    background: #FFF;
    border: 1px solid var(--color-border);
    padding: 6px 14px;
    border-radius: 8px;
    color: var(--color-text-main);
}

.stats-card-box {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-card {
    background: var(--color-surface-alt);
    padding: 24px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateX(6px);
}

.gold-border {
    border-left-color: var(--color-accent-gold);
}

.green-border {
    border-left-color: var(--color-primary);
}

.blue-border {
    border-left-color: var(--color-accent-blue);
}

.stat-icon {
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.gold-border .stat-icon {
    color: var(--color-accent-gold);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-main);
    line-height: 1.1;
    margin-bottom: 6px;
}

.stat-number .unit {
    font-size: 1.25rem;
    /* 20px bold */
    color: var(--color-primary);
}

.stat-label {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    /* 19.2px bold */
    font-weight: 700;
    color: var(--color-text-body);
}

.countries-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.c-flag {
    font-size: 1.125rem;
    /* 18px bold */
    font-weight: 700;
    background: #FFF;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--color-border);
}

/* INFOGRAPHIC 3: Dashboard Po Mỷ 4.0 */
.pomy-dashboard {
    position: relative;
    background: linear-gradient(135deg, #0F2027, #203A43, #2C5364);
    border-radius: var(--radius-md);
    padding: 48px 32px;
    color: #FFF;
    overflow: hidden;
}

.center-hub {
    position: relative;
    width: 150px;
    height: 150px;
    margin: 0 auto 40px auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hub-circle {
    width: 125px;
    height: 125px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), #15803D);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    color: #FFF;
    box-shadow: 0 0 30px rgba(30, 142, 90, 0.6);
    z-index: 2;
}

.hub-circle span {
    font-size: 1.125rem;
    /* 18px bold */
    letter-spacing: 1px;
    opacity: 0.95;
    font-weight: 700;
}

.hub-circle strong {
    font-size: 1.7rem;
    /* 27.2px bold */
    font-weight: 800;
    line-height: 1;
}

.hub-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0% {
        transform: scale(0.9);
        opacity: 0.8;
    }

    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}

.pomy-nodes-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}

.p-node {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 14px 24px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.p-node:hover {
    background: rgba(30, 142, 90, 0.6);
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

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

.p-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    /* 20px bold */
    font-weight: 800;
    color: #FFF;
}

.pomy-metrics-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    background: rgba(0, 0, 0, 0.3);
    padding: 24px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.m-val {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-accent-gold-light);
}

.m-lbl {
    font-size: 1.125rem;
    /* 18px bold */
    color: rgba(255, 255, 255, 0.95);
    font-weight: 700;
}

/* INFOGRAPHIC 4: Tech Pipeline & Metrics */
.tech-comparison-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-surface-alt);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    margin-bottom: 36px;
    gap: 12px;
    flex-wrap: wrap;
}

.tech-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    min-width: 130px;
}

.tech-icon-box {
    width: 68px;
    height: 68px;
    border-radius: 16px;
    background: #FFF;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-main);
    margin-bottom: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.highlight-step .tech-icon-box {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.export-step .tech-icon-box {
    background: var(--color-accent-gold-light);
    color: var(--color-accent-gold);
    border-color: var(--color-accent-gold);
}

.t-step-name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    /* 19.2px bold */
    font-weight: 800;
    color: var(--color-text-main);
}

.t-step-desc {
    font-size: 1.125rem;
    /* 18px */
    font-weight: 600;
    color: var(--color-text-muted);
}

.tech-arrow {
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 800;
}

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

.bm-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 24px 20px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.progress-ring-container {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.progress-ring-circle {
    transition: stroke-dashoffset 1s ease-in-out;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

.ring-text {
    position: absolute;
    font-family: var(--font-heading);
    font-size: 1.6rem;
    /* 25.6px bold */
    font-weight: 800;
    color: var(--color-text-main);
}

.bm-big-val {
    font-family: var(--font-heading);
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--color-accent-gold);
    line-height: 1;
}

.bm-big-val.green-val {
    color: var(--color-primary);
}

.bm-card-info h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    /* 20px bold */
    font-weight: 800;
    color: var(--color-text-main);
    margin-bottom: 4px;
}

.bm-card-info p {
    font-size: 1.125rem;
    /* 18px */
    color: var(--color-text-muted);
}

/* INFOGRAPHIC 5: Intellectual Property Ecosystem */
.intellectual-ecosystem {
    position: relative;
    height: 480px;
    background: radial-gradient(circle at center, #F0FDF4 0%, #FCFCF9 70%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.shield-ring {
    position: absolute;
    border-radius: 50%;
    border: 2px dashed var(--color-primary-light);
}

.outer-ring {
    width: 400px;
    height: 400px;
    animation: rotateRing 30s linear infinite;
}

.middle-ring {
    width: 280px;
    height: 280px;
    animation: rotateRing 20s linear infinite reverse;
}

@keyframes rotateRing {
    100% {
        transform: rotate(360deg);
    }
}

.core-brand {
    position: absolute;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: #FFF;
    border: 3px solid var(--color-primary);
    box-shadow: 0 0 28px rgba(30, 142, 90, 0.25);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.brand-shield-icon {
    color: var(--color-primary);
    margin-bottom: 2px;
}

.core-brand span {
    font-size: 1.125rem;
    /* 18px bold */
    font-weight: 800;
    color: var(--color-text-muted);
}

.core-brand strong {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    /* 20px bold */
    font-weight: 800;
    color: var(--color-text-main);
}

.ip-nodes-container {
    position: absolute;
    width: 100%;
    height: 100%;
}

.ip-node {
    position: absolute;
    background: #FFF;
    border: 1px solid var(--color-border);
    padding: 10px 20px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease;
    z-index: 6;
}

.ip-node:hover {
    transform: scale(1.1);
    border-color: var(--color-primary);
}

.ip-ic {
    font-size: 1.3rem;
}

.ip-txt {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    /* 19.2px bold */
    font-weight: 800;
    color: var(--color-text-main);
}

/* Positioning 8 Orbits around core on wider canvas */
.node-logo {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.node-qr {
    top: 70px;
    right: 15%;
}

.node-nhan-hieu {
    top: 50%;
    right: 6%;
    transform: translateY(-50%);
}

.node-bao-bi {
    bottom: 70px;
    right: 15%;
}

.node-ocop {
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.node-geo {
    bottom: 70px;
    left: 15%;
}

.node-anti-fake {
    top: 50%;
    left: 6%;
    transform: translateY(-50%);
}

.node-website {
    top: 70px;
    left: 15%;
}

/* INFOGRAPHIC 6: Brand Protection Barrier */
.protection-flow-container {
    position: relative;
    padding: 20px 0;
}

.protection-steps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.prot-step {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--color-surface-alt);
    padding: 22px 26px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--color-primary);
    transition: all 0.3s ease;
}

.prot-step:hover {
    background: var(--color-surface-mint);
    transform: translateY(-4px);
}

.final-prot-step {
    grid-column: span 2;
    background: var(--color-primary-light);
    border-left-color: var(--color-accent-gold);
    justify-content: center;
}

.prot-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #FFF;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-dark);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    flex-shrink: 0;
}

.p-step-num {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    /* 18px bold */
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.prot-info h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    /* 20px bold */
    font-weight: 800;
    color: var(--color-text-main);
}

.prot-info p {
    font-size: 1.125rem;
    /* 18px */
    color: var(--color-text-muted);
}

/* --- EDITORIAL IMAGES & CAPTIONS --- */
.article-image-box {
    margin: 40px 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #FFF;
    box-shadow: var(--box-shadow-card);
    border: 1px solid var(--color-border);
}

.article-image-box img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 520px;
}

figcaption {
    padding: 14px 20px;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    background: var(--color-surface-alt);
    border-top: 1px solid var(--color-border);
    font-style: italic;
}

.image-gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* --- QUOTE BOX STYLING --- */
.quote-section {
    padding: 40px 0;
}

.quote-card {
    background: linear-gradient(135deg, #EBF7F0 0%, #F5F9F6 100%);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-lg);
    padding: 48px;
    position: relative;
    text-align: center;
    box-shadow: 0 10px 30px rgba(30, 142, 90, 0.08);
}

.quote-icon {
    font-family: Georgia, serif;
    font-size: 5rem;
    color: var(--color-primary);
    line-height: 0.5;
    margin-bottom: 20px;
    opacity: 0.4;
}

.quote-text {
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--color-primary-dark);
    max-width: 800px;
    margin: 0 auto 20px auto;
}

.quote-author {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* --- INTERACTIVE ENDING SECTION --- */
.ending-section {
    padding: 80px 0 40px 0;
    background: linear-gradient(180deg, #FCFCF9 0%, #EBF5F0 100%);
    border-top: 1px solid var(--color-border);
}

.ending-box {
    background: #FFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 50px 32px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.06);
    text-align: center;
}

.ending-header-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-text-main);
    margin-bottom: 8px;
}

.ending-header-sub {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

.ending-interactive-tree {
    max-width: 860px;
    margin: 0 auto;
}

.ending-center-circle {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), #115E39);
    color: #FFF;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 40px auto;
    box-shadow: 0 10px 30px rgba(30, 142, 90, 0.4);
}

.ending-center-circle strong {
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 800;
}

.ending-center-circle span {
    font-size: 1.125rem;
    opacity: 0.9;
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid var(--color-primary);
    animation: pulseRing 2.5s infinite;
}

@keyframes pulseRing {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    100% {
        transform: scale(1.35);
        opacity: 0;
    }
}

.ending-branches-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 30px;
    text-align: left;
}

.ending-branch {
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--color-border);
}

.branch-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    color: var(--color-primary);
}

.branch-head h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--color-text-main);
}

.branch-list {
    list-style: none;
}

.branch-list li {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-body);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.b-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    flex-shrink: 0;
}

.ending-merging-lines {
    height: 60px;
    margin-bottom: 20px;
}

.final-cta-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--color-primary), #15803D);
    color: #FFF;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    padding: 18px 40px;
    border-radius: 40px;
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(30, 142, 90, 0.4);
    transition: all 0.3s ease;
    overflow: hidden;
}

.final-cta-btn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 15px 40px rgba(30, 142, 90, 0.5);
}

/* --- FINAL AUTHOR SECTION (EXACTLY "An Chi" ONLY, CENTERED ABOVE FOOTER) --- */
.final-author-section {
    padding: 40px 0 60px 0;
    background: var(--color-bg);
    text-align: center;
}

.author-only-name {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-text-main);
    display: inline-block;
    letter-spacing: -0.5px;
}

/* --- FOOTER STYLING --- */
.vnb-footer {
    background: #111827;
    color: #9CA3AF;
    padding: 40px 0;
    border-top: 1px solid #1F2937;
}

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

.f-logo .logo-vn {
    color: #EF4444;
}

.f-logo .logo-biz {
    color: #FFF;
}

.f-logo .logo-dot {
    color: var(--color-accent-gold);
}

.f-copy {
    font-size: 0.9rem;
}

.f-links {
    display: flex;
    gap: 16px;
}

.f-links a {
    color: #D1D5DB;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.f-links a:hover {
    color: var(--color-primary);
}

/* --- ANIMATION HELPERS --- */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* --- RESPONSIVE BREAKPOINTS --- */
@media (max-width: 992px) {
    .grid-sapo {
        grid-template-columns: 1fr;
    }

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

    .ending-branches-grid {
        grid-template-columns: 1fr;
    }

    .image-gallery-grid {
        grid-template-columns: 1fr;
    }

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

    .protection-steps {
        grid-template-columns: 1fr;
    }

    .final-prot-step {
        grid-column: span 1;
    }

    .horizontal-flow-wrapper .flow-grid {
        overflow-x: auto;
        padding-bottom: 12px;
    }

    .flow-node {
        min-width: 130px;
    }

    .intellectual-ecosystem {
        height: 600px;
    }

    .node-logo {
        top: 20px;
        left: 50%;
    }

    .node-qr {
        top: 80px;
        right: 8%;
    }

    .node-nhan-hieu {
        top: 40%;
        right: 4%;
    }

    .node-bao-bi {
        bottom: 120px;
        right: 8%;
    }

    .node-ocop {
        bottom: 20px;
        left: 50%;
    }

    .node-geo {
        bottom: 120px;
        left: 8%;
    }

    .node-anti-fake {
        top: 40%;
        left: 4%;
    }

    .node-website {
        top: 80px;
        left: 8%;
    }
}

@media (max-width: 640px) {
    .main-title {
        font-size: 2rem;
    }

    .infographic-box {
        padding: 24px 16px;
    }

    .bm-metrics-grid {
        grid-template-columns: 1fr;
    }

    .pomy-metrics-bar {
        grid-template-columns: 1fr;
    }
}