:root {
    /* Base Palette (独立配色方案) */
    --teal-bright: #06d6a0;
    --coral: #ef476f;
    --gold: #ffc43d;
    --purple-deep: #6930c3;
    --sky-blue: #118ab2;

    /* Theme — Vibrant Garden */
    --primary-color: var(--teal-bright);
    --primary-hover: #05b587;
    --secondary-color: var(--coral);
    --accent-color: var(--gold);
    --tertiary-color: var(--purple-deep);
    --info-color: var(--sky-blue);
    --warning-color: var(--gold);
    --success-color: var(--teal-bright);
    --danger-color: var(--coral);

    /* UI Foundation (dark) */
    --dark-bg: #0d1b2a;
    --dark-bg-secondary: #1b263b;
    --dark-bg-tertiary: #2c3e50;

    /* Text */
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;

    /* Borders */
    --border-color: #415a77;
    --border-hover: #5a7c9e;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--teal-bright) 0%, var(--sky-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--coral) 0%, var(--purple-deep) 100%);
    --gradient-dark: linear-gradient(180deg, #0d1b2a 0%, #1b263b 100%);
    --gradient-gaming: linear-gradient(135deg, var(--teal-bright), var(--gold), var(--coral), var(--purple-deep), var(--sky-blue));
}

/*
:root.theme-2 {  Theme 2 — Sunset Heat
  --primary-color: var(--orange-pantone);
  --primary-hover: #d14904;
  --secondary-color: var(--rose);
  --accent-color: var(--amber);
  --tertiary-color: var(--blue-violet);
  --info-color: var(--azure);
  --warning-color: var(--orange-pantone);
  --success-color: var(--amber);
  --danger-color: var(--rose);
  --gradient-primary: linear-gradient(135deg, var(--orange-pantone) 0%, var(--amber) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--rose) 0%, var(--azure) 100%);
  --gradient-gaming: linear-gradient(135deg, var(--orange-pantone), var(--amber), var(--rose), var(--blue-violet), var(--azure));
}

:root.theme-3 {  Theme 3 — Neon Rose
  --primary-color: var(--rose);
  --primary-hover: #d1005b;
  --secondary-color: var(--azure);
  --accent-color: var(--amber);
  --tertiary-color: var(--blue-violet);
  --info-color: var(--azure);
  --warning-color: var(--amber);
  --success-color: var(--azure);
  --danger-color: var(--rose);
  --gradient-primary: linear-gradient(135deg, var(--rose) 0%, var(--amber) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--azure) 0%, var(--blue-violet) 100%);
  --gradient-gaming: linear-gradient(135deg, var(--rose), var(--amber), var(--azure), var(--blue-violet));
}

:root.theme-4 {  Theme 4 — Violet Surge
  --primary-color: var(--blue-violet);
  --primary-hover: #6f2cd8;
  --secondary-color: var(--azure);
  --accent-color: var(--amber);
  --tertiary-color: var(--orange-pantone);
  --info-color: var(--azure);
  --warning-color: var(--amber);
  --success-color: var(--azure);
  --danger-color: var(--rose);
  --gradient-primary: linear-gradient(135deg, var(--blue-violet) 0%, var(--azure) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--rose) 0%, var(--orange-pantone) 100%);
  --gradient-gaming: linear-gradient(135deg, var(--blue-violet), var(--azure), var(--amber), var(--rose));
}

:root.theme-5 {  Theme 5 — Solar Amber
  --primary-color: var(--amber);
  --primary-hover: #d7a408;
  --secondary-color: var(--blue-violet);
  --accent-color: var(--azure);
  --tertiary-color: var(--orange-pantone);
  --info-color: var(--azure);
  --warning-color: var(--orange-pantone);
  --success-color: var(--amber);
  --danger-color: var(--rose);
  --gradient-primary: linear-gradient(135deg, var(--amber) 0%, var(--rose) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--azure) 0%, var(--blue-violet) 100%);
  --gradient-gaming: linear-gradient(135deg, var(--amber), var(--orange-pantone), var(--rose), var(--blue-violet), var(--azure));
}
*/

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    margin-top: 70px;
    padding: 4rem 0;
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.1;
    animation: gradientShift 10s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { transform: translateX(0) translateY(0); }
    50% { transform: translateX(-20px) translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.8s ease;
}

.hero-title .highlight {
    color: var(--accent-color);
    -webkit-text-fill-color: var(--accent-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Codes Showcase */
.codes-showcase {
    background: var(--dark-bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    margin: 0 auto 2rem auto;
    max-width: 900px;
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.codes-title {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.codes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.code-card {
    background: var(--dark-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.code-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(58, 134, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.code-card:hover::before {
    left: 100%;
}

.code-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(58, 134, 255, 0.3);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.code-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.code-badge.new {
    background: var(--success-color);
    color: white;
}

.code-badge.active-badge {
    background: var(--primary-color);
    color: white;
}

.code-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: 'Courier New', monospace;
}

.code-reward {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.copy-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.copy-btn.copied {
    background: var(--success-color);
}

.codes-update {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(58, 134, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

/* Sections */
section {
    padding: 4rem 0;
}

.about-section {
    background: var(--dark-bg-secondary);
}

.about-section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Features Grid */
.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--dark-bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(58, 134, 255, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How to Redeem Section */
.how-to-redeem {
    background: var(--dark-bg-secondary);
}

.how-to-redeem h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-intro {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.step-card {
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    transition: all 0.3s ease;
}

.step-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.step-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.step-card p {
    color: var(--text-secondary);
}

/* Tips Grid */
.gameplay-tips h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.tip-card {
    background: var(--dark-bg-secondary);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tip-card:hover {
    transform: translateX(5px);
}

.tip-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tip-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Plants Showcase */
.popular-plants {
    background: var(--dark-bg-secondary);
}

.popular-plants h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.plants-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.plant-card {
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.plant-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(58, 134, 255, 0.2);
}

.plant-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.rarity {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.rarity.common {
    background: #64748b;
    color: white;
}

.rarity.rare {
    background: #3b82f6;
    color: white;
}

.rarity.epic {
    background: var(--tertiary-color);
    color: white;
}

.rarity.legendary {
    background: var(--accent-color);
    color: #0A0E1A;
}

.rarity.mythic {
    background: var(--secondary-color);
    color: white;
}

.plant-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* FAQ Section */
.faq-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--dark-bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Community Section */
.community-section {
    background: var(--dark-bg-secondary);
    text-align: center;
}

.community-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.community-section p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.community-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.community-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.community-btn.discord {
    background: #5865F2;
    color: white;
}

.community-btn.discord:hover {
    background: #4752C4;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(88, 101, 242, 0.4);
}

.community-btn.roblox {
    background: #ee1c24;
    color: white;
}

.community-btn.roblox:hover {
    background: #c91a20;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(238, 28, 36, 0.4);
}

.community-btn .icon {
    font-size: 1.5rem;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--dark-bg);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .cta-buttons {
        flex-direction: column;
    }

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

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

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

    .plants-showcase {
        grid-template-columns: 1fr;
    }

    .community-links {
        flex-direction: column;
        align-items: center;
    }

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

/* Animations */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.code-badge.new {
    animation: pulse 2s infinite;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}
/* moved */