:root {
    /* Future Tech Palette */
    --bg-main: #0a0a0a;
    --bg-card: #111111;
    --bg-card-hover: #161616;

    --text-main: #ffffff;
    --text-muted: #888888;
    /* Slightly lighter for better Chinese readability */

    --accent: #FF3300;
    /* Electric Orange */
    --accent-gradient: linear-gradient(135deg, #FF3300, #FF6600);

    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-glow: rgba(255, 51, 0, 0.3);

    /* Fonts - Added Chinese Fonts */
    --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', 'PingFang SC', 'Microsoft YaHei', monospace;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Effects */
.noise-overlay {
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 10;
}

.scanline {
    position: fixed;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.2) 50%);
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 11;
    opacity: 0.3;
}

/* Layout Container */
.bento-wrapper {
    width: 100%;
    max-width: 1200px;
    height: 80vh;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(6, 1fr);
    gap: 16px;
    height: 100%;
    opacity: 0;
    animation: fadeIn 0.5s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.bento-item {
    background-color: var(--bg-card);
    box-shadow: 0 0 0 1px var(--border-subtle);
    padding: 32px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    overflow: hidden;
}

.bento-item:hover {
    background-color: var(--bg-card-hover);
    box-shadow: 0 0 0 1px var(--border-glow);
    z-index: 2;
}

/* Navigation Controls */
.nav-controls {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 24px;
    z-index: 20;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
}

.nav-arrow {
    background: none;
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-arrow:hover:not(.disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.nav-arrow.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.page-indicator {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    display: flex;
    gap: 8px;
    color: var(--text-muted);
}

#current-page {
    color: var(--accent);
}

/* --- Page Types --- */

/* Cover Page Specifics */
.cover-title {
    grid-column: 1 / 9;
    grid-row: 1 / 5;
    justify-content: space-between;
}

.cover-hud {
    grid-column: 9 / 13;
    grid-row: 1 / 4;
    background: radial-gradient(circle at top right, rgba(255, 51, 0, 0.05), transparent 60%);
}

.cover-action {
    grid-column: 9 / 13;
    grid-row: 4 / 7;
    background: var(--accent-gradient);
    color: #000;
    cursor: pointer;
    justify-content: space-between;
}

.cover-deco {
    grid-column: 5 / 9;
    grid-row: 5 / 7;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.cover-info {
    grid-column: 1 / 5;
    grid-row: 5 / 7;
    justify-content: flex-end;
}

/* Cover Details */
.corner-mark {
    position: absolute;
    width: 12px;
    height: 12px;
    border-top: 2px solid var(--accent);
    border-left: 2px solid var(--accent);
}

.top-left {
    top: 0;
    left: 0;
}

.header-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    display: flex;
    gap: 16px;
    letter-spacing: 0.05em;
    /* Reduced for Chinese */
}

.swiss-desc {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-muted);
    max-width: 300px;
    letter-spacing: 0.02em;
    /* Reduced for Chinese */
}

/* HUD Details */
.hud-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}

.hud-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.data-row {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.data-label {
    color: var(--text-muted);
    width: 30px;
}

.data-val {
    color: var(--accent);
    width: 30px;
    text-align: right;
}

.data-bar {
    flex: 1;
    height: 2px;
    background: var(--border-subtle);
}

.bar-fill {
    height: 100%;
    background: var(--accent);
}

.data-graph {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 60px;
    margin-top: 16px;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 4px;
}

.graph-bar {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    transition: height 0.3s;
}

.bento-item:hover .graph-bar {
    background: var(--accent);
}

/* Action Details */
.nav-content {
    display: flex;
    flex-direction: column;
}

.nav-label {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
}

.nav-sub {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    opacity: 0.7;
}

.nav-icon {
    align-self: flex-end;
    transform: rotate(-45deg);
    transition: transform 0.3s;
    font-size: 1.5rem;
}

.cover-action:hover .nav-icon {
    transform: rotate(0deg);
}

/* Deco Details */
.deco-circle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--text-muted);
    border-radius: 50%;
}

.deco-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-align: center;
    color: var(--text-muted);
}

/* Info Details */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.info-block {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

.value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-main);
}

/* Overview Page Specifics */
.overview-title {
    grid-column: 1 / 7;
    grid-row: 1 / 4;
}

.overview-def {
    grid-column: 7 / 13;
    grid-row: 1 / 3;
}

.overview-desc {
    grid-column: 1 / 7;
    grid-row: 4 / 7;
}

.overview-points {
    grid-column: 7 / 13;
    grid-row: 3 / 7;
}

/* Demo Page Specifics */
.demo-header {
    grid-column: 1 / 13;
    grid-row: 1 / 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.demo-stage {
    grid-column: 1 / 9;
    grid-row: 2 / 7;
    background: #000;
    border: 1px solid var(--border-subtle);
    position: relative;
}

.demo-controls {
    grid-column: 9 / 13;
    grid-row: 2 / 7;
}

/* Typography Helpers */
.hero-text {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

/* Adjusted for Chinese */
.text-outline {
    -webkit-text-stroke: 1px rgba(255, 255, 255, 0.3);
    color: transparent;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
    letter-spacing: 0.05em;
}

.body-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-muted);
    text-align: justify;
}

/* Increased line-height for Chinese */
.list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-main);
}

.list-bullet {
    width: 6px;
    height: 6px;
    background: var(--accent);
}

/* Demo Stage Styles */
.stage-content {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Consistency Demo */
.btn-consistent {
    padding: 12px 24px;
    background: var(--accent);
    border: none;
    color: #000;
    font-weight: bold;
    cursor: pointer;
}

.btn-inconsistent-1 {
    padding: 10px;
    background: blue;
    color: white;
    border-radius: 10px;
    margin: 5px;
    cursor: pointer;
}

.btn-inconsistent-2 {
    padding: 15px 30px;
    background: green;
    border: 2px solid white;
    margin: 5px;
    font-family: serif;
    cursor: pointer;
}

/* Clarity Demo */
.cluttered-box {
    border: 1px solid red;
    padding: 20px;
    background: #220000;
    display: grid;
    gap: 5px;
}

.clean-box {
    border: 1px solid var(--border-subtle);
    padding: 40px;
    text-align: center;
}

/* Hierarchy Demo */
.flat-text {
    font-size: 1rem;
    color: #fff;
    line-height: 1.5;
}

.hierarchical-text h1 {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 10px;
}

.hierarchical-text p {
    font-size: 1rem;
    color: var(--text-muted);
}

/* Contrast Demo */
.low-contrast {
    color: #333;
    background: #222;
    padding: 20px;
}

.high-contrast {
    color: #FFF;
    background: #000;
    padding: 20px;
    border: 1px solid var(--accent);
}

/* Whitespace Demo */
.cramped {
    padding: 0;
    letter-spacing: -1px;
    line-height: 1;
}

.spacious {
    padding: 40px;
    letter-spacing: 0.05em;
    line-height: 2;
}

/* Control Buttons */
.control-btn {
    display: block;
    width: 100%;
    padding: 16px;
    margin-bottom: 12px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.control-btn:hover,
.control-btn.active {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    color: var(--text-main);
}

.control-btn.active::before {
    content: '> ';
    color: var(--accent);
}


/* Menu Page Specifics */
.menu-header {
    grid-column: 1 / 5;
    grid-row: 1 / 7;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.menu-card {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.menu-card:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.menu-card:hover .menu-arrow {
    color: var(--accent);
    transform: translateX(5px);
}

.menu-card:hover .menu-title {
    color: var(--accent);
}

.menu-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.5;
}

.menu-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
    transition: color 0.3s;
}

.menu-sub {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.menu-arrow {
    align-self: flex-end;
    font-family: var(--font-mono);
    color: var(--text-muted);
    transition: all 0.3s;
}

/* Menu Grid Positions */
.menu-card-0 {
    grid-column: 5 / 9;
    grid-row: 1 / 3;
}

.menu-card-1 {
    grid-column: 9 / 13;
    grid-row: 1 / 3;
}

.menu-card-2 {
    grid-column: 5 / 9;
    grid-row: 3 / 5;
}

.menu-card-3 {
    grid-column: 9 / 13;
    grid-row: 3 / 5;
}

.menu-card-4 {
    grid-column: 5 / 13;
    grid-row: 5 / 7;
    flex-direction: row;
    align-items: center;
}

.menu-card-4 .menu-content {
    flex: 1;
    margin-left: 20px;
}


/* Summary Page Specifics */
.summary-title {
    grid-column: 1 / 7;
    grid-row: 1 / 4;
    justify-content: center;
}

.summary-desc {
    grid-column: 7 / 13;
    grid-row: 1 / 3;
    justify-content: center;
}

.summary-feat-0 {
    grid-column: 1 / 4;
    grid-row: 4 / 7;
}

.summary-feat-1 {
    grid-column: 4 / 7;
    grid-row: 4 / 7;
}

.summary-feat-2 {
    grid-column: 7 / 10;
    grid-row: 3 / 6;
}

.summary-feat-3 {
    grid-column: 10 / 13;
    grid-row: 3 / 6;
}

.summary-action {
    grid-column: 7 / 13;
    grid-row: 6 / 7;
    background: var(--accent-gradient);
    color: #000;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

.summary-action:hover .nav-icon {
    transform: rotate(0deg);
}

/* Responsive */
@media (max-width: 900px) {
    .bento-grid {
        display: flex;
        flex-direction: column;
        height: auto;
    }

    .bento-item {
        min-height: 200px;
    }

    .nav-controls {
        width: 90%;
        justify-content: space-between;
    }

    .hero-text {
        font-size: 3rem;
    }
}