/* ==================== CSS 变量定义 ==================== */
:root {
    /* 深色主题配色 */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #13131a;
    --color-bg-tertiary: #1a1a24;

    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* 玻璃态效果 */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover-bg: rgba(255, 255, 255, 0.06);
    --glass-hover-border: rgba(255, 255, 255, 0.15);

    /* 文字颜色 */
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.75);
    --color-text-tertiary: rgba(255, 255, 255, 0.5);
    --color-text-muted: rgba(255, 255, 255, 0.35);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.3);

    /* 间距系统 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ==================== 动态背景 ==================== */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #667eea 0%, transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #764ba2 0%, transparent 70%);
    bottom: -10%;
    right: -10%;
    animation-delay: -7s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #4facfe 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ==================== 主容器 ==================== */
.main-wrapper {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==================== Hero 区域 ==================== */
.hero-section {
    padding: var(--space-24) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 85vh;
}

.hero-container {
    max-width: 900px;
    text-align: center;
    animation: fadeInUp 1s ease both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-5);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    backdrop-filter: blur(20px);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(102, 126, 234, 0);
    }
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.domain-title {
    margin-bottom: var(--space-6);
}

.domain-text {
    display: inline-block;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    animation: shimmer 3s ease-in-out infinite;
    background-size: 200% 100%;
}

@keyframes shimmer {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.hero-tagline {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-12);
    font-weight: 300;
    letter-spacing: 0.05em;
}

/* ==================== 按钮组 ==================== */
.hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--color-text-primary);
    backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: var(--glass-hover-bg);
    border-color: var(--glass-hover-border);
    transform: translateY(-2px);
}

.btn-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ==================== 服务区域 ==================== */
.services-section {
    padding: var(--space-20) var(--space-6);
}

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

.section-heading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

.heading-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--glass-border), transparent);
    max-width: 200px;
}

.heading-text {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

/* ==================== 服务卡片 ==================== */
.service-card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    backdrop-filter: blur(20px);
    transition: all var(--transition-slow);
    overflow: hidden;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
}

.service-card:hover .card-glow {
    opacity: 1;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--glass-hover-border);
    box-shadow: var(--shadow-xl);
}

.card-content {
    position: relative;
    z-index: 1;
}

.card-icon-wrapper {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    transition: all var(--transition-base);
}

.service-card:hover .card-icon-wrapper {
    transform: rotateY(180deg);
}

.card-icon {
    width: 32px;
    height: 32px;
    color: white;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    font-style: italic;
    margin-bottom: var(--space-4);
}

.card-desc {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.card-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}

.card-link:hover {
    color: #667eea;
}

.card-link:hover svg {
    transform: translateX(4px);
}

/* 高亮卡片 */
.card-highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: rgba(102, 126, 234, 0.2);
}

.card-highlight .card-icon-wrapper {
    background: var(--gradient-accent);
}

/* DNS 信息框 */
.dns-box {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.dns-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(79, 172, 254, 0.2);
    border-radius: var(--radius-md);
}

.dns-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: #4facfe;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dns-value {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    background: none;
    border: none;
    padding: 0;
}

/* ==================== 页脚 ==================== */
.footer {
    margin-top: auto;
    padding: var(--space-12) var(--space-6);
    border-top: 1px solid var(--glass-border);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.footer-nav a {
    padding: var(--space-2) var(--space-4);
    color: var(--color-bg-primary);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    opacity: 0;
    pointer-events: none;
}

.footer-nav a:hover {
    color: var(--color-bg-primary);
    background: transparent;
}

.footer-copy {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .hero-section {
        padding: var(--space-16) var(--space-4);
        min-height: 70vh;
    }

    .domain-text {
        font-size: 2.5rem;
    }

    .hero-tagline {
        font-size: 1.25rem;
    }

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

    .btn {
        justify-content: center;
    }

    .services-section {
        padding: var(--space-12) var(--space-4);
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .section-heading {
        gap: var(--space-4);
    }

    .heading-line {
        max-width: 60px;
    }

    .heading-text {
        font-size: 1.5rem;
    }

    .footer-nav {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .status-badge {
        font-size: 0.75rem;
        padding: var(--space-2) var(--space-4);
    }

    .domain-text {
        font-size: 2rem;
    }

    .service-card {
        padding: var(--space-6);
    }
}