:root {
    --primary-color: #0A2540; /* Tech Navy Blue */
    --accent-color: #00D084; /* Security Green */
    --accent-hover: #00a86b;
    --text-color: #333333;
    --light-bg: #F7F9FC;
    --white: #ffffff;
    --gray-border: #E6E6E6;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.1);
    --radius-md: 12px;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    color: var(--primary-color);
}

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

button {
    cursor: pointer;
    font-family: inherit;
}

/* Rounded Shadow Image Helper */
.rounded-shadow-img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease;
    width: 100%;
    object-fit: cover;
    max-height: 400px;
}

.rounded-shadow-img:hover {
    transform: scale(1.02);
}

/* Hero Section */
.hero {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
    min-height: 600px;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 20px;
    color: var(--white);
}

.hero-title .highlight {
    color: var(--accent-color);
    display: block;
    margin-top: 10px;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    color: rgba(255,255,255,0.9);
}

.hero-cta {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 15px 30px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 208, 132, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hero-image {
    flex: 1;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Pain Points */
.pain-points {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #666;
    margin-top: -40px;
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease;
    border: 1px solid rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.pain-card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.pain-card h3 {
    margin-bottom: 15px;
    font-size: 1.25rem;
}

/* What is VDI Section */
.what-is-vdi {
    padding: 100px 0;
    background-color: var(--white);
}

.vdi-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}

.lead-text {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.vdi-list {
    list-style: none;
    margin-top: 30px;
}

.vdi-list li {
    margin-bottom: 20px;
    padding-left: 20px;
    position: relative;
    font-size: 1.05rem;
}

.vdi-list li::before {
    content: "";
    width: 8px;
    height: 8px;
    background-color: var(--accent-color);
    border-radius: 50%;
    position: absolute;
    left: 0;
    top: 10px;
}

/* Architecture Comparison Section */
.architecture-comparison {
    padding: 100px 0;
    background: var(--light-bg);
}

.arch-container {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.arch-diagram {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-soft);
}

.arch-header {
    text-align: center;
    margin-bottom: 40px;
}

.diagram-box {
    display: flex;
    justify-content: center;
    gap: 40px;
    align-items: stretch;
}

.diagram-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    border: 1px dashed #ddd;
    border-radius: 12px;
    position: relative;
}

.diagram-col h4 {
    margin-bottom: 20px;
    color: #555;
    font-size: 1.2rem;
}

.diagram-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.diagram-arrow {
    font-size: 2rem;
    color: #ccc;
    align-self: center;
}

.vdi-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.server-block {
    background: var(--primary-color);
    color: white;
    padding: 20px;
    border-radius: 8px;
    width: 80%;
    text-align: center;
    margin-bottom: 20px;
    position: relative;
}
.server-block::after {
    content: '☁️ 算力/存储/管理';
    display: block;
    font-size: 0.9rem;
    margin-top: 5px;
    opacity: 0.8;
}

.network-line {
    height: 40px;
    width: 2px;
    background: var(--accent-color);
    margin-bottom: 20px;
    position: relative;
}
.network-line::after {
    content: '千兆局域网';
    position: absolute;
    left: 10px;
    top: 10px;
    white-space: nowrap;
    font-size: 0.8rem;
    color: var(--accent-color);
    font-weight: bold;
}

.clients-row {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.client-box {
    background: #eee;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    text-align: center;
    width: 80px;
}

.trad-flow {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    width: 100%;
}

.pc-box {
    border: 1px solid #ccc;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    position: relative;
}
.pc-box::before {
    content: '💻';
    font-size: 2rem;
    display: block;
    margin-bottom: 5px;
}
.pc-box .problem {
    color: red;
    font-size: 0.8rem;
    display: block;
    margin-top: 5px;
}


/* Resource Allocation Section (Dynamic Reuse) */
.resource-allocation {
    padding: 100px 0;
    background: #fff;
}

.allocation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 50px;
}

.allocation-card {
    background: #fff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid #eee;
}

.allocation-card h3 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.chart-visual, .pool-visual {
    height: 250px;
    background: #fcfcfc;
    border-radius: 8px;
    margin-bottom: 25px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    padding: 20px;
    border: 1px dashed #ddd;
}

/* Traditional Visual */
.bar-group {
    width: 60px;
    height: 100%;
    margin: 0 15px;
    display: flex;
    flex-direction: column-reverse;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}
.user-bar {
    background: #ff6b6b;
    width: 100%;
    transition: height 0.5s;
    position: relative;
}
.user-bar span {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-size: 0.8rem;
    color: #333;
    font-weight: bold;
}
.user-bar small {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.7rem;
    color: #fff;
    white-space: nowrap;
}
.waste {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 0.8rem;
    background: #f0f0f0;
}

/* VDI Visual */
.pool-visual {
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}
.resource-pool {
    width: 80%;
    height: 100px;
    background: var(--primary-color);
    border-radius: 0 0 16px 16px;
    position: relative;
    overflow: hidden;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    z-index: 2;
}
.pool-water {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60%;
    background: var(--accent-color);
    opacity: 0.3;
    animation: wave 3s infinite linear;
}
.arrows {
    margin: 10px 0;
    color: var(--accent-color);
    font-weight: bold;
    text-align: center;
}
.arrows span { display: block; }
.users-row {
    display: flex;
    gap: 20px;
    justify-content: center;
    width: 100%;
}
.user-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: #fff;
    font-weight: bold;
    position: relative;
}
.user-circle::after {
    content: '';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    border: 2px solid #fff;
}
.user-circle.low { background: #4dabf7; } 
.user-circle.low::after { background: #40c057; } /* Active */
.user-circle.high { background: #fa5252; transform: scale(1.1); }
.user-circle.high::after { background: #40c057; }
.user-circle.off { background: #adb5bd; opacity: 0.5; }
.user-circle.off::after { background: #868e96; }

@keyframes wave {
    0% { transform: translateY(0); }
    50% { transform: translateY(5px); }
    100% { transform: translateY(0); }
}

.allocation-desc {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.6;
}

/* Benefits */
.benefits {
    padding: 100px 0;
}

.benefit-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 120px; /* Increased spacing */
}

.benefit-row:last-child {
    margin-bottom: 0;
}

.benefit-row.reverse {
    flex-direction: row-reverse;
}

.benefit-text {
    flex: 1;
}

.benefit-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.benefit-visual {
    flex: 1;
}

.benefit-points-list {
    list-style: none;
    margin-top: 25px;
}
.benefit-points-list li {
    margin-bottom: 15px;
    font-size: 0.95rem;
    color: #444;
}
.benefit-points-list li strong {
    color: var(--primary-color);
    display: inline-block;
    margin-right: 5px;
}

/* Use Cases */
.use-cases {
    padding: 80px 0;
    background-color: var(--primary-color);
    color: var(--white);
}

.use-cases .section-title {
    color: var(--white);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 30px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.case-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
    color: var(--accent-color);
}

.case-card p {
    margin-bottom: 15px;
    font-size: 0.95rem;
    opacity: 0.9;
    color: rgba(255,255,255,0.8);
}

/* Pricing */
.pricing {
    padding: 100px 0;
    background: var(--light-bg);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

/* Comparison Table */
.comparison {
    padding: 100px 0;
    background-color: var(--white);
}

.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    overflow: hidden;
}

.comparison-table th, .comparison-table td {
    padding: 25px 20px;
    text-align: left;
    border-bottom: 1px solid var(--gray-border);
}

.comparison-table th {
    background-color: var(--primary-color);
    color: var(--white);
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.comparison-table .highlight-col {
    background-color: #f0fffa;
    color: #008a55;
    position: relative;
}

.comparison-table .highlight-col::after {
    /* Optional: highlight border */
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-left: 1px solid rgba(0,208,132,0.2);
    border-right: 1px solid rgba(0,208,132,0.2);
    pointer-events: none;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

/* FAQ Section */
.faq-section {
    padding: 100px 0;
    background: #fff;
    border-top: 1px solid #eee;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.faq-item h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--primary-color);
    font-weight: 700;
}

.faq-item p {
    font-size: 0.95rem;
    color: #555;
}

/* Tech Specs */
.tech-specs {
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.spec-card ul li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    font-size: 0.95rem;
}

.spec-card ul li::before {
    content: "•";
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Footer */
footer {
    background-color: #051321;
    color: rgba(255, 255, 255, 0.6);
    padding: 60px 0;
    text-align: center;
    font-size: 0.9rem;
}


/* --- NEW SECTIONS STYLES --- */

/* Security Deep Dive */
.security-deep-dive {
    padding: 100px 0;
    background: #051321; /* Dark theme for security */
    color: white;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.security-item {
    background: rgba(255,255,255,0.05);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: transform 0.3s;
}

.security-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.08);
}

.security-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: block;
}

.security-item h4 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.security-item p {
    color: rgba(255,255,255,0.8);
    font-size: 0.9rem;
}

/* Deployment Process (Timeline) */
.deployment-section {
    padding: 100px 0;
    background: var(--white);
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 60px auto 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--light-bg);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
    border-radius: 3px;
}

.timeline-container {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-container::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -12.5px;
    background-color: var(--white);
    border: 4px solid var(--accent-color);
    top: 25px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-left {
    left: 0;
}

.timeline-right {
    left: 50%;
}

.timeline-left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 28px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
    border-color: transparent transparent transparent #f9f9f9;
}

.timeline-right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 28px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent #f9f9f9 transparent transparent;
}

.timeline-right::after {
    left: -12.5px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: #f9f9f9;
    position: relative;
    border-radius: 8px;
    box-shadow: var(--shadow-soft);
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.step-number {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

/* Software Ecosystem */
.software-section {
    padding: 80px 0;
    background: var(--light-bg);
}

.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 40px;
    text-align: center;
}

.software-item {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.software-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Environment Upgrade */
.env-upgrade {
    padding: 100px 0;
    background: white;
}

.env-comparison {
    display: flex;
    gap: 40px;
    margin-top: 50px;
}

.env-card {
    flex: 1;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

.env-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
}

.env-overlay {
    background: rgba(0,0,0,0.03);
    padding: 30px;
    border: 1px solid #eee;
    border-top: none;
    border-radius: 0 0 16px 16px;
}

.env-bad {
    border-top: 4px solid #ff6b6b;
}

.env-good {
    border-top: 4px solid #00D084;
}

/* Mobile Responsiveness Updates */
@media (max-width: 900px) {
    .vdi-content {
        grid-template-columns: 1fr;
    }
    .vdi-image-container {
        order: -1; 
    }
    .allocation-grid {
        grid-template-columns: 1fr;
    }
    .diagram-box {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
    }
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image {
        height: 300px;
        width: 100%;
    }

    .benefit-row, .benefit-row.reverse {
        flex-direction: column;
        gap: 30px;
        margin-bottom: 80px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table th, .comparison-table td {
        padding: 15px;
        font-size: 0.9rem;
    }

    /* Timeline Mobile */
    .timeline::after {
        left: 31px;
    }
    
    .timeline-container {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    .timeline-container::before {
        left: 60px;
        border: medium solid white;
        border-width: 10px 10px 10px 0;
        border-color: transparent #f9f9f9 transparent transparent;
    }

    .timeline-left::after, .timeline-right::after {
        left: 18px;
    }
    
    .timeline-right {
        left: 0%;
    }

    /* Env Comparison Mobile */
    .env-comparison {
        flex-direction: column;
    }
}