/* CSS Variables for Abiotic Factor Theme */
:root {
    /* Primary Colors - Deep Green Sci-fi Theme */
    --color-primary: #00ff88;
    --color-primary-dark: #00cc6a;
    --color-secondary: #00ffaa;
    --color-accent: #44ff88;
    
    /* Background Colors */
    --color-bg-primary: #0a0f0a;
    --color-bg-secondary: #0f1b0f;
    --color-bg-tertiary: #152015;
    --color-bg-card: #1a251a;
    --color-bg-modal: rgba(10, 15, 10, 0.95);
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #ccffcc;
    --color-text-muted: #99cc99;
    --color-text-green: #00ff88;
    
    /* Border Colors */
    --color-border: #00ff88;
    --color-border-dark: #005533;
    --color-border-glow: rgba(0, 255, 136, 0.3);
    
    /* Grid and Pattern Colors */
    --color-grid: rgba(0, 255, 136, 0.1);
    --color-grid-glow: rgba(0, 255, 136, 0.2);
    
    /* Typography */
    --font-family-primary: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
    --font-family-heading: 'Arial', 'Helvetica', sans-serif;
    
    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.3);
    --shadow-green-glow: 0 0 30px rgba(0, 255, 136, 0.5);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-header: 1000;
    --z-modal: 2000;
    --z-loading: 3000;
}

/* Global Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    background-image: url('../images/background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    overflow-x: hidden;
    position: relative;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

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

a:hover {
    color: var(--color-secondary);
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-center { text-align: center; }

/* Fixed Header */
.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 15, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-dark);
    z-index: var(--z-header);
    transition: all var(--transition-base);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.site-title {
    font-size: var(--font-size-xl);
    margin: 0;
    color: var(--color-primary);
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.main-nav {
    display: flex;
    gap: var(--spacing-xl);
}

.main-nav a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: var(--font-size-xl);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.main-nav a:hover {
    color: var(--color-primary);
    background: var(--color-bg-card);
    box-shadow: var(--shadow-glow);
}

.language-toggle {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.language-toggle:hover {
    background: var(--color-primary);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-green-glow);
}

/* Introduction Section */
.introduction-section {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl) 0;
    background: rgba(15, 27, 15, 0.85);
    backdrop-filter: blur(5px);
}

.intro-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: flex-start;
}

.intro-game-logo {
    display: block;
    width: 300px;
    height: auto;
    margin: 0 auto var(--spacing-xl) auto;
    filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.5));
    border-radius: var(--radius-md);
}

.intro-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: left;
}

.intro-text h1 {
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    width: fit-content;
}

.intro-text h2 {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    width: fit-content;
}

.intro-text p {
    font-size: var(--font-size-base);
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    text-align: left;
}

.intro-text p:last-child {
    margin-bottom: 0;
}

.intro-video {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    padding-top: var(--spacing-3xl);
}

.youtube-player {
    width: 100%;
    max-width: 560px;
    position: relative;
}

.youtube-player iframe {
    width: 100%;
    height: 315px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    border: 2px solid rgba(0, 255, 136, 0.3);
    transition: var(--transition-base);
}

.youtube-player iframe:hover {
    box-shadow: var(--shadow-green-glow);
    border-color: var(--color-primary);
}

/* Main Process Section */
.process-flow{display:none!important;}

/* ===== Carousel Styles ===== */
.carousel-wrapper{position:relative;display:flex;align-items:center;gap:var(--spacing-md);}
.carousel-track{display:flex;gap:var(--spacing-xl);overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:var(--spacing-md) 0;}
.process-card{flex:0 0 300px;scroll-snap-align:start;background:var(--color-bg-card);border:2px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:transform var(--transition-base),box-shadow var(--transition-base);}
.process-card:hover{transform:translateY(-6px) scale(1.05);box-shadow:var(--shadow-glow);border-color:var(--color-primary);}
.process-card img{width:100%;height:180px;object-fit:cover;border-top-left-radius:inherit;border-top-right-radius:inherit;}
.process-card h3{text-align:center;color:var(--color-primary);margin:var(--spacing-md) 0;}
.process-card ul{padding:0 var(--spacing-md) var(--spacing-md) var(--spacing-lg);list-style:disc;color:var(--color-text-secondary);font-size:var(--font-size-sm);line-height:1.4;}
.tbc-card{display:flex;align-items:center;justify-content:center;height:100%;padding:var(--spacing-xl);color:var(--color-primary);font-size:var(--font-size-lg);text-align:center;}
.carousel-btn{background:var(--color-primary);color:var(--color-bg-primary);border:none;border-radius:50%;width:44px;height:44px;font-size:1.5rem;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background var(--transition-fast);}
.carousel-btn:hover{background:var(--color-accent);}
.main-process-section {
    padding: var(--spacing-3xl) 0;
    background: rgba(10, 15, 10, 0.9);
    backdrop-filter: blur(5px);
}

.section-title {
    text-align: center;
    color: var(--color-primary);
    margin-bottom: var(--spacing-3xl);
    font-size: var(--font-size-4xl);
    text-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
}

.process-flow {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.process-step {
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 200px;
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--color-primary);
}

.step-image {
    margin-bottom: var(--spacing-md);
}

.step-img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-dark);
}

.step-title {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.step-details {
    text-align: left;
}

.step-details ul {
    list-style: none;
    padding: 0;
}

.step-details li {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
}

.step-details li::before {
    content: "▶";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 0.8em;
}

.process-arrow {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-top: 60px;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.final-step {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.final-step .step-title {
    color: var(--color-accent);
    font-style: italic;
}

/* ===== Detailed Walkthrough ===== */
.detailed-walkthrough-section{
    background:rgba(15,27,15,0.85);
    backdrop-filter:blur(5px);
    padding:var(--spacing-3xl) 0;
}

.walkthrough-content{display:none;}
.dw-container{display:grid;grid-template-columns:220px 1fr;height:calc(100vh - 200px);max-height:600px;}
.dw-nav{background:transparent;display:flex;flex-direction:column;padding:var(--spacing-md) 0;}
.dw-nav-item{padding:var(--spacing-md);border:none;background:transparent;color:var(--color-text-secondary);text-align:left;cursor:pointer;transition:all var(--transition-fast);border-left:4px solid transparent;font-weight:600;}
.dw-nav-item:hover{color:var(--color-primary);} 
.dw-nav-item.active{color:var(--color-primary);border-left-color:var(--color-primary);background:rgba(0,255,136,0.05);} 
.dw-panel-wrapper{background:transparent;overflow-y:auto;padding:var(--spacing-2xl);height:100%;}
.dw-panel{display:none;animation:fadeUp 0.3s ease-out;}
.dw-panel.active{display:block;}
.dw-panel h3{color:var(--color-primary);margin-bottom:var(--spacing-md);} 
.dw-panel img{width:100%;margin:var(--spacing-md) 0;border-radius:var(--radius-md);border:1px solid var(--color-border-dark);} 
@keyframes fadeUp{from{opacity:0;transform:translateY(20px);}to{opacity:1;transform:translateY(0);} }
/* Responsive */
@media(max-width:1023px){.dw-container{grid-template-columns:1fr;grid-template-rows:auto 1fr;}.dw-nav{flex-direction:row;overflow-x:auto;}.dw-nav-item{border-left:none;border-bottom:4px solid transparent;}.dw-nav-item.active{border-bottom-color:var(--color-primary);}}
@media(max-width:767px){.dw-nav{display:none;} .dw-panel{display:block;} .dw-panel-wrapper{overflow-y:auto;height:60vh;max-height:500px;padding:var(--spacing-md);border:1px solid var(--color-border-dark);border-radius:var(--radius-md);background:rgba(0,255,136,0.02);}}


.walkthrough-content {
    max-width: 800px;
    margin: 0 auto;
}

.walkthrough-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.walkthrough-title {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.walkthrough-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Guide Map Section */
.guide-map-section {
    padding: var(--spacing-3xl) 0;
    background: rgba(10, 15, 10, 0.9);
    backdrop-filter: blur(5px);
}

/* Simple Map Grid - 2 columns, 4 rows */
.simple-map-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.simple-map-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-base);
    cursor: pointer;
}

.simple-map-image:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

/* Valuation Section */
.reviews-section {
    padding: var(--spacing-3xl) 0;
    background: rgba(15, 27, 15, 0.85);
    backdrop-filter: blur(5px);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.review-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    /* 轮播模式下的固定宽度和滚动对齐 */
    flex: 0 0 320px;
    scroll-snap-align: start;
    min-height: 280px;
}

.review-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-glow);
}

.review-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-name {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stars {
    color: #ffd700;
    font-size: var(--font-size-lg);
}

.review-content p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.review-date {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Footer */
.footer {
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border-dark);
    padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-left, .footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.footer-logo-img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.footer-logo h3 {
    color: var(--color-primary);
    margin: 0;
    font-size: var(--font-size-xl);
}

.footer-logo-desc {
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    margin: 0;
    line-height: 1.4;
}

.footer-info p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links h2 {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: normal;
}

.footer-links a {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    display: inline-block;
    width: fit-content;
}

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

.footer .footer-languages h2,
.footer .footer-info h2 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.language-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xs);
}

/* Grid for footer language buttons */
.lang-grid {
    display: grid;
    grid-template-columns: repeat(2, auto);
    gap: var(--spacing-xs) var(--spacing-lg);
}

.footer-lang-btn {
    background: transparent;
    border: 1px solid var(--color-border-dark);
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.footer-lang-btn:hover {
    border-color: var(--color-border);
    color: var(--color-primary);
}

.footer-bottom {
    border-top: 1px solid var(--color-border-dark);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    margin: 0;
}

/* Modal Styles */
.language-modal,
.map-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-modal);
    backdrop-filter: blur(10px);
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.language-modal-content,
.map-modal-content {
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-green-glow);
}

.language-modal-header,
.map-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-dark);
}

.language-modal-header h2,
.map-modal-header h2 {
    color: var(--color-primary);
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-2xl);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.close-btn:hover {
    color: var(--color-primary);
    background: var(--color-bg-tertiary);
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.language-btn {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-dark);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.language-btn:hover {
    background: var(--color-primary);
    color: var(--color-bg-primary);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.map-modal-content {
    max-width: 90vw;
}

.map-modal-body {
    padding: var(--spacing-lg);
}

.modal-map-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-dark);
}

/* Loading Indicator */
.loading-indicator {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-modal);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border-dark);
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scroll Behavior */
html {
    scroll-padding-top: 80px;
}