/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-primary: #f9fafc;
    --bg-secondary: #f0f2f5;
    --text-primary: #0a0f1d;
    --text-secondary: #4a5568;
    --accent-gold: #d97706;
    --accent-gold-hover: #b45309;
    --card-bg: #ffffff;
    --border-color: rgba(10, 15, 29, 0.1);
    --glass-bg: rgba(249, 250, 252, 0.85);
    --emerald: #10b981;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0a0f1d;
    --bg-secondary: #111827;
    --text-primary: #f9fafc;
    --text-secondary: #9ca3af;
    --accent-gold: #d97706;
    --card-bg: #1f2937;
    --border-color: rgba(249, 250, 252, 0.1);
    --glass-bg: rgba(10, 15, 29, 0.85);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
    overflow-x: hidden;
}

a {
    color: var(--accent-gold);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--accent-gold-hover);
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition);
}
.frosted {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 32px;
}
.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}
.nav-links a:hover {
    color: var(--text-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
}
.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-primary) !important;
}
.btn-primary:hover {
    background-color: var(--text-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary) !important;
}
.btn-outline:hover {
    border-color: var(--text-primary);
}
.btn-large {
    padding: 14px 36px;
    font-size: 1.05rem;
}
.btn-copy {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-copy.success {
    border-color: var(--emerald);
    color: var(--emerald) !important;
}

/* Theme Toggle */
.theme-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition);
    padding: 0;
}
.theme-btn:hover {
    background-color: var(--bg-secondary);
}
.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

/* 英雄区 Hero */
.hero {
    padding: 180px 0 120px;
}
.hero-split {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}
.hero-text {
    flex: 1;
}
.headline {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}
.accent-text {
    color: var(--accent-gold);
}
.sub-headline {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 540px;
}
.hero-actions {
    display: flex;
    gap: 16px;
}

/* 瓷感卡片 - Widget */
.hero-widget {
    flex: 0 0 400px;
    perspective: 1000px;
}
.porcelain-widget {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(10, 15, 29, 0.04), inset 0 2px 4px rgba(255,255,255,0.6);
    border-radius: 24px;
    padding: 50px 40px;
    text-align: center;
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out;
}
[data-theme="dark"] .porcelain-widget {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), inset 0 1px 2px rgba(255,255,255,0.05);
}

/* Astrolabe Switch */
.astrolabe-toggle {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 30px;
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    box-shadow: inset 0 4px 10px rgba(0,0,0,0.05);
}
[data-theme="dark"] .astrolabe-toggle {
    box-shadow: inset 0 4px 10px rgba(0,0,0,0.3);
}
.ring-track {
    position: absolute;
    top: -2px; left: -2px; right: -2px; bottom: -2px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: border-color 0.5s, box-shadow 0.5s;
}
.astrolabe-toggle.active .ring-track {
    border-color: var(--emerald);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}
.brass-dial {
    width: 66px;
    height: 66px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fcd34d, #d97706);
    box-shadow: inset 0 2px 4px rgba(255,255,255,0.4), 0 4px 12px rgba(0,0,0,0.2);
    position: relative;
    transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.indicator-dot {
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 4px rgba(255,255,255,0.8);
}
.quadrant-marks {
    position: absolute;
    top: 50%; left: 50%;
    width: 100%; height: 100%;
    transform: translate(-50%, -50%);
    background-image: 
        linear-gradient(to right, transparent 48%, rgba(255,255,255,0.3) 49%, transparent 51%),
        linear-gradient(to bottom, transparent 48%, rgba(255,255,255,0.3) 49%, transparent 51%);
    border-radius: 50%;
}
.astrolabe-toggle.active .brass-dial {
    transform: rotate(180deg);
}
.widget-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}
.widget-status {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.3s;
}

/* Sections */
.section {
    padding: 100px 0;
}
.bg-alt {
    background-color: var(--bg-secondary);
}
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 60px;
    text-align: center;
    letter-spacing: -0.01em;
}

/* 瓷感卡片 (通用) */
.porcelain-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 10px 30px rgba(10, 15, 29, 0.03);
    transition: transform 0.3s;
}
.porcelain-card:hover {
    transform: translateY(-4px);
}
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.grid-4 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
@media (min-width: 992px) {
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}
.brass-icon {
    font-size: 2rem;
    margin-bottom: 20px;
}
.porcelain-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    font-weight: 600;
}
.porcelain-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tag-card {
    text-align: center;
    padding: 24px 16px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 定价表 */
.fare-matrix {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(10, 15, 29, 0.03);
}
.pricing-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 32px 40px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    transition: background-color var(--transition);
}
.pricing-row:last-child {
    border-bottom: none;
}
.pricing-row:hover {
    background-color: rgba(10, 15, 29, 0.02);
}
[data-theme="dark"] .pricing-row:hover {
    background-color: rgba(249, 250, 252, 0.03);
}
.pricing-row::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 0;
    background: var(--accent-gold);
    transition: height var(--transition);
    border-radius: 0 4px 4px 0;
}
.pricing-row:hover::before {
    height: 50%;
}
.plan-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.plan-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.plan-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}
.period {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: normal;
}

/* FAQ & Reviews */
.review-card .stars {
    color: var(--accent-gold);
    margin-bottom: 16px;
    font-size: 1.2rem;
}
.review-card p {
    font-style: italic;
    margin-bottom: 20px;
}
.review-card .author {
    font-weight: 600;
    font-size: 0.9rem;
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}
.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}
.faq-item h4 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}
.faq-item p {
    color: var(--text-secondary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.9rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 2000;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

/* 页脚 */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 30px;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 32px;
}
.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 8px;
}
.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.footer-links {
    display: flex;
    gap: 24px;
}
.footer-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}
.footer-links a:hover {
    color: var(--text-primary);
}
.footer-bottom {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

/* 子页面复用样式 */
.page-header {
    padding: 140px 0 80px;
    text-align: center;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}
.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
}
.page-content {
    max-width: 760px;
    margin: 0 auto;
    padding: 80px 24px;
}
.page-content h2 {
    font-size: 1.5rem;
    margin: 40px 0 20px;
}
.page-content p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}
.page-content ul {
    margin-left: 20px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}
.page-content li {
    margin-bottom: 10px;
}

/* 响应式 */
@media (max-width: 992px) {
    .hero-split {
        flex-direction: column;
        text-align: center;
    }
    .sub-headline {
        margin: 0 auto 40px;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-widget {
        flex: none;
        width: 100%;
        max-width: 400px;
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-row {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    .pricing-row::before {
        top: 0; left: 50%; transform: translateX(-50%);
        width: 0; height: 4px;
        border-radius: 0 0 4px 4px;
    }
    .pricing-row:hover::before {
        width: 50%; height: 4px;
    }
}
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .grid-3 {
        grid-template-columns: 1fr;
    }
    .headline {
        font-size: 2.5rem;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}