/* ============ Variables ============ */
:root {
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card: #1a1a25;
    --color-surface: #22222f;
    --color-border: #2a2a3a;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0b8;
    --color-text-muted: #6a6a80;
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-accent: #8b5cf6;
    --color-success: #22c55e;
    --color-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --color-gradient-bg: linear-gradient(180deg, #0a0a0f 0%, #0f0f1a 50%, #0a0a0f 100%);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --max-width: 1200px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

img, svg {
    display: block;
    max-width: 100%;
}

/* ============ Container ============ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary-light);
    background: rgba(99, 102, 241, 0.1);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 0%, #c4c4d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============ Navbar ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

.nav-logo svg {
    color: var(--color-primary-light);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 15px;
    color: var(--color-text-secondary);
    transition: var(--transition);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-text-secondary);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.lang-switch:hover {
    color: var(--color-text);
    border-color: var(--color-primary);
}

.lang-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 24px;
    margin-top: 8px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px;
    min-width: 120px;
    box-shadow: var(--shadow-lg);
}

.lang-menu.show {
    display: block;
}

.lang-menu a {
    display: block;
    padding: 8px 12px;
    font-size: 14px;
    color: var(--color-text-secondary);
    border-radius: 6px;
    transition: var(--transition);
}

.lang-menu a:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============ Hero ============ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 70%, rgba(139, 92, 246, 0.12) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    max-width: 640px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--color-success);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    align-self: flex-start;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(48px, 8vw, 72px);
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: 24px;
}

.hero-title > span:first-child {
    display: block;
    background: var(--color-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    display: block;
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 500;
    color: var(--color-text-secondary);
    -webkit-text-fill-color: var(--color-text-secondary);
    background: none;
    margin-top: 8px;
}

.hero-desc {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.btn-store {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-md);
    transition: var(--transition);
    min-width: 200px;
}

.btn-store:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.btn-store svg {
    flex-shrink: 0;
}

.btn-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.btn-small {
    font-size: 11px;
    font-weight: 500;
    opacity: 0.7;
}

.btn-large {
    font-size: 18px;
    font-weight: 700;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--color-border);
}

.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    position: relative;
}

.phone-frame {
    width: 100%;
    height: 100%;
    background: var(--color-surface);
    border-radius: 40px;
    border: 2px solid var(--color-border);
    padding: 10px;
    position: relative;
    box-shadow: var(--shadow-lg), 0 0 80px rgba(99, 102, 241, 0.2);
}

.phone-notch {
    width: 100px;
    height: 24px;
    background: var(--color-bg);
    border-radius: 0 0 16px 16px;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-gradient-bg);
    border-radius: 30px;
    overflow: hidden;
    position: relative;
}

.screen-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--color-text-muted);
}

.screen-placeholder p {
    font-size: 14px;
}

/* ============ Features ============ */
.features {
    background: var(--color-gradient-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.15);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--color-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
}

/* ============ Game Intro ============ */
.game-intro {
    background: var(--color-bg);
}

.intro-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.intro-content .section-title {
    text-align: left;
}

.intro-text {
    font-size: 17px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.intro-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.intro-list li {
    position: relative;
    padding-left: 28px;
    font-size: 16px;
    color: var(--color-text);
}

.intro-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    background: rgba(34, 197, 94, 0.15);
    border-radius: 50%;
}

.intro-list li::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
}

.visual-card {
    aspect-ratio: 1;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.visual-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.1), transparent 70%);
}

.visual-inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 280px;
}

/* ============ Screenshots ============ */
.screenshots {
    background: var(--color-gradient-bg);
}

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

.screenshot-item {
    aspect-ratio: 9/16;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.screenshot-item:hover {
    transform: scale(1.03);
    border-color: var(--color-primary);
}

.screenshot-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

/* ============ CTA ============ */
.cta {
    background: var(--color-bg);
}

.cta-card {
    text-align: center;
    background: var(--color-gradient);
    border-radius: var(--radius-lg);
    padding: 64px 32px;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.2), transparent 50%);
    pointer-events: none;
}

.cta-card h2 {
    font-size: clamp(28px, 4vw, 40px);
    color: white;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-card p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.cta-card .hero-buttons {
    justify-content: center;
    position: relative;
    z-index: 1;
}

/* ============ Community ============ */
.community {
    background: var(--color-gradient-bg);
}

.community-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.community-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
}

.community-card:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* ============ Footer ============ */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 64px 0 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-desc {
    color: var(--color-text-secondary);
    font-size: 15px;
    max-width: 280px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ============ Legal Pages ============ */
.legal-page {
    padding-top: 120px;
    min-height: 100vh;
}

.legal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px 64px;
}

.legal-container h1 {
    font-size: 36px;
    margin-bottom: 16px;
    background: var(--color-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.legal-container .updated {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 40px;
}

.legal-container h2 {
    font-size: 20px;
    margin: 32px 0 12px;
    color: var(--color-text);
}

.legal-container p {
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    line-height: 1.7;
}

.legal-container ul {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    padding-left: 20px;
}

.legal-container ul li {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .hero-visual {
        position: relative;
        right: auto;
        top: auto;
        transform: none;
        margin-top: 48px;
        display: flex;
        justify-content: center;
    }

    .hero {
        display: block;
        padding-top: 100px;
    }

    .hero-content {
        max-width: 100%;
    }

    .intro-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-elevated);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.show {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .hero-buttons .btn-store {
        min-width: auto;
        flex: 1;
        justify-content: center;
    }

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

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

    .phone-mockup {
        width: 220px;
        height: 440px;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        gap: 16px;
    }

    .screenshots-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .community-links {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .btn-store {
        padding: 12px 20px;
    }
}

/* ============ Animations ============ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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