:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-dark: #0a0e27;
    --bg-card: rgba(26, 32, 64, 0.85);
    --bg-card-hover: rgba(36, 45, 90, 0.9);
    --bg-input: rgba(15, 20, 45, 0.8);
    --text-primary: #e8eaf6;
    --text-secondary: rgba(232, 234, 246, 0.7);
    --text-muted: rgba(232, 234, 246, 0.5);
    --accent-purple: #a78bfa;
    --accent-blue: #60a5fa;
    --accent-pink: #f472b6;
    --accent-gold: #fbbf24;
    --accent-green: #34d399;
    --accent-red: #f87171;
    --border-subtle: rgba(167, 139, 250, 0.2);
    --shadow-glow: 0 0 30px rgba(167, 139, 250, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --transition-normal: 0.3s ease;
}

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

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

#stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#stars-canvas {
    width: 100%;
    height: 100%;
}

.app-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-icon {
    font-size: 1.8rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: twinkle 2s ease-in-out infinite;
}

@keyframes twinkle {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

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

.nav-btn {
    padding: 0.6rem 1.2rem;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    font-family: inherit;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: rgba(167, 139, 250, 0.1);
    border-color: var(--border-subtle);
}

.nav-btn.active {
    color: var(--text-primary);
    background: rgba(167, 139, 250, 0.15);
    border-color: var(--accent-purple);
}


.auth-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.auth-btn {
    padding: 0.6rem 1.2rem;
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(167, 139, 250, 0.4);
}

.user-avatar {
    font-size: 1.2rem;
}

.user-nickname {
    font-size: 0.9rem;
}

/* AI咨询按钮 */
.ai-consult-btn {
    margin: 1.5rem auto;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    font-family: inherit;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    max-width: 300px;
}

.ai-consult-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.ai-consult-btn .btn-icon {
    font-size: 1.25rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.hero-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    min-height: 400px;
}

.hero-text {
    flex: 1;
    max-width: 500px;
}

.hero-text h2 {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #fff 0%, #a78bfa 50%, #f472b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.cta-btn {
    position: relative;
    padding: 1rem 2.5rem;
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: btnShine 3s infinite;
}

@keyframes btnShine {
    0% {
        left: -100%;
    }

    50%,
    100% {
        left: 100%;
    }
}

.hero-zodiac-wheel {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

#zodiac-wheel {
    width: 400px;
    height: 400px;
}

.quick-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-purple);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

/* 功能卡片 SVG 图标容器 */
.feature-icon--svg {
    font-size: 0;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
}

.card-bazi-icon {
    width: 52px;
    height: 52px;
    display: block;
    overflow: visible;
    animation: baziCardPulse 4s ease-in-out infinite;
}

@keyframes baziCardPulse {

    0%,
    100% {
        filter: drop-shadow(0 0 4px rgba(251, 191, 36, 0.35));
    }

    50% {
        filter: drop-shadow(0 0 10px rgba(251, 191, 36, 0.7)) drop-shadow(0 0 16px rgba(167, 139, 250, 0.3));
    }
}

.card-ai-icon {
    width: 52px;
    height: 52px;
    display: block;
    overflow: visible;
    animation: aiCardPulse 4s ease-in-out infinite;
}

@keyframes aiCardPulse {

    0%,
    100% {
        filter: drop-shadow(0 0 4px rgba(167, 139, 250, 0.4));
    }

    50% {
        filter: drop-shadow(0 0 12px rgba(167, 139, 250, 0.8)) drop-shadow(0 0 20px rgba(244, 114, 182, 0.3));
    }
}

.feature-card:nth-child(1) .feature-icon {
    color: var(--accent-gold);
}

.feature-card:nth-child(2) .feature-icon {
    color: var(--accent-blue);
}

.feature-card:nth-child(3) .feature-icon {
    color: var(--accent-pink);
}

.feature-card:nth-child(4) .feature-icon {
    color: var(--accent-purple);
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Feature tag badge inside card */
.feature-tag {
    display: inline-block;
    padding: 0.2rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
    background: rgba(167, 139, 250, 0.15);
    border: 1px solid rgba(167, 139, 250, 0.4);
    color: var(--accent-purple);
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

.feature-card:nth-child(2) .feature-tag {
    background: rgba(251, 191, 36, 0.12);
    border-color: rgba(251, 191, 36, 0.4);
    color: var(--accent-gold);
}

.feature-card:nth-child(3) .feature-tag {
    background: rgba(96, 165, 250, 0.12);
    border-color: rgba(96, 165, 250, 0.4);
    color: var(--accent-blue);
}

.feature-card:nth-child(4) .feature-tag {
    background: rgba(244, 114, 182, 0.15);
    border-color: rgba(244, 114, 182, 0.5);
    color: var(--accent-pink);
}

.feature-card:nth-child(5) .feature-tag {
    background: rgba(52, 211, 153, 0.12);
    border-color: rgba(52, 211, 153, 0.4);
    color: var(--accent-green);
}

/* ── Hero Section Enhancements ── */
.hero-badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.2), rgba(244, 114, 182, 0.2));
    border: 1px solid rgba(167, 139, 250, 0.5);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-purple);
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-md);
    backdrop-filter: blur(10px);
    animation: badgeGlow 3s ease-in-out infinite alternate;
}

@keyframes badgeGlow {
    from {
        box-shadow: 0 0 8px rgba(167, 139, 250, 0.2);
    }

    to {
        box-shadow: 0 0 18px rgba(167, 139, 250, 0.5);
    }
}

.hero-highlight {
    background: linear-gradient(90deg, #a78bfa, #f472b6, #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.cta-btn-secondary {
    position: relative;
    padding: 1rem 2rem;
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.5);
    border-radius: var(--radius-lg);
    color: var(--accent-purple);
    font-size: 1.05rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
    backdrop-filter: blur(10px);
}

.cta-btn-secondary:hover {
    background: rgba(167, 139, 250, 0.2);
    border-color: var(--accent-purple);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(167, 139, 250, 0.3);
}

/* 按钮内 SVG 图标 + 文字水平对齐 */
.btn-icon-wrap {
    display: inline-flex;
    align-items: center;
    gap: 0;
    line-height: 1;
}

/* hero-tag 内 SVG 与文字对齐 */
.hero-tag {
    display: inline-flex !important;
    align-items: center;
    gap: 0;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hero-tag {
    padding: 0.3rem 0.8rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
    backdrop-filter: blur(6px);
    transition: all var(--transition-normal);
}

.hero-tag:hover {
    border-color: rgba(167, 139, 250, 0.4);
    color: var(--text-primary);
}

/* ── Core Advantages Banner ── */
.core-advantages {
    display: flex;
    align-items: stretch;
    gap: 0;
    background: linear-gradient(135deg, rgba(26, 32, 64, 0.9) 0%, rgba(36, 28, 60, 0.9) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.core-advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #a78bfa, #f472b6, #fbbf24);
}

.advantage-item {
    flex: 1;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-md);
}

.advantage-item:first-child {
    padding-left: 0;
}

.advantage-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(167, 139, 250, 0.12);
    border-radius: var(--radius-md);
    border: 1px solid rgba(167, 139, 250, 0.2);
}

/* AI 双盘智能体专属图标容器 */
.advantage-icon--ai {
    background: transparent;
    border: none;
    width: 52px;
    height: 52px;
    padding: 0;
    overflow: visible;
    animation: aiIconPulse 4s ease-in-out infinite;
}

@keyframes aiIconPulse {

    0%,
    100% {
        filter: drop-shadow(0 0 4px rgba(167, 139, 250, 0.4));
    }

    50% {
        filter: drop-shadow(0 0 12px rgba(167, 139, 250, 0.8)) drop-shadow(0 0 20px rgba(244, 114, 182, 0.3));
    }
}

.ai-dual-icon {
    width: 52px;
    height: 52px;
    display: block;
    overflow: visible;
}

/* 专业星盘图标 */
.advantage-icon--chart {
    background: transparent;
    border: none;
    width: 52px;
    height: 52px;
    padding: 0;
    overflow: visible;
    animation: chartIconPulse 5s ease-in-out infinite;
}

@keyframes chartIconPulse {

    0%,
    100% {
        filter: drop-shadow(0 0 4px rgba(96, 165, 250, 0.4));
    }

    50% {
        filter: drop-shadow(0 0 12px rgba(96, 165, 250, 0.8)) drop-shadow(0 0 18px rgba(167, 139, 250, 0.4));
    }
}

.chart-icon {
    width: 52px;
    height: 52px;
    display: block;
    overflow: visible;
}

/* 八字四柱图标 */
.advantage-icon--bazi {
    background: transparent;
    border: none;
    width: 52px;
    height: 52px;
    padding: 0;
    overflow: visible;
    animation: baziIconPulse 4s ease-in-out infinite;
}

@keyframes baziIconPulse {
    0% {
        filter: drop-shadow(0 0 4px rgba(52, 211, 153, 0.4));
    }

    33% {
        filter: drop-shadow(0 0 8px rgba(248, 113, 113, 0.5));
    }

    66% {
        filter: drop-shadow(0 0 8px rgba(251, 191, 36, 0.5));
    }

    100% {
        filter: drop-shadow(0 0 4px rgba(52, 211, 153, 0.4));
    }
}

.bazi-icon {
    width: 52px;
    height: 52px;
    display: block;
    overflow: visible;
}

.advantage-content h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    background: linear-gradient(135deg, #e8eaf6, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.advantage-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.advantage-divider {
    color: rgba(167, 139, 250, 0.3);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-xs);
    flex-shrink: 0;
}

.today-overview {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.today-overview h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-purple);
}

.today-overview h3 span {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: normal;
    margin-left: var(--spacing-sm);
}

.celestial-positions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.celestial-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: var(--bg-input);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.major-aspects {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.aspect-tag {
    padding: 0.4rem 0.8rem;
    background: rgba(167, 139, 250, 0.15);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.aspect-tag.harmonious {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.aspect-tag.challenging {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.main-footer {
    text-align: center;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-subtle);
    background: rgba(10, 14, 39, 0.5);
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.95);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--text-muted);
    min-height: 300px;
}

.placeholder-icon {
    font-size: 4rem;
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

@media (max-width: 1024px) {
    .main-header {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    .hero-section {
        flex-direction: column;
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-tags {
        justify-content: center;
    }

    .core-advantages {
        flex-direction: column;
        padding: var(--spacing-lg);
    }

    .advantage-item {
        padding: var(--spacing-sm) 0;
    }

    .advantage-item:first-child {
        padding-left: 0;
    }

    .advantage-divider {
        transform: rotate(90deg);
        padding: 0;
        align-self: center;
    }

    #zodiac-wheel {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .hero-text h2 {
        font-size: 2rem;
    }

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

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .cta-btn,
    .cta-btn-secondary {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
}