/* ========================================
   云域互联 - 全站样式表
   专业二级域名服务平台
   ======================================== */

/* CSS 变量 */
:root {
    /* 颜色系统 - 亮色系 */
    --primary: #0066FF;
    --primary-light: #3388FF;
    --secondary: #00D4FF;
    --accent: #7C3AED;
    --bg-dark: #E8EBF0;
    --bg-darker: #D8DDE4;
    --surface: rgba(255, 255, 255, 0.6);
    --surface-hover: rgba(255, 255, 255, 0.8);
    --border: rgba(255, 255, 255, 0.4);
    --border-hover: rgba(255, 255, 255, 0.6);
    --text-primary: #1A1A2E;
    --text-secondary: rgba(26, 26, 46, 0.75);
    --text-muted: rgba(26, 26, 46, 0.55);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
    --gradient-hero: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
    --gradient-glow: linear-gradient(135deg, rgba(0, 102, 255, 0.15), rgba(0, 212, 255, 0.15));
    
    /* 字体 */
    --font-cn: 'ZCOOL KuaiLe', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 间距 */
    --container-max: 1200px;
    --section-padding: 100px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 阴影 */
    --shadow-glow: 0 0 30px rgba(0, 102, 255, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: var(--font-cn);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

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

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

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

/* ========================================
   背景动画
   ======================================== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    animation: bgSlide 30s ease-in-out infinite;
}

@keyframes bgSlide {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.85) 0%, rgba(5, 8, 25, 0.9) 100%);
}

.bg-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.4);
    z-index: 1;
}

.grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(60px); }
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.85) 0%, rgba(255,255,255,0.6) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.4);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
}

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

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

.btn-outline-white {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-primary);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 18px;
    height: 18px;
}

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

.hero-content {
    max-width: 1000px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.4) 100%);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: 50px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease;
}

.badge-dot {
    width: 12px;
    height: 12px;
    background: #00FF88;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: 40px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s both;
    white-space: nowrap;
}

@media (max-width: 1200px) {
    .hero-title {
        font-size: 36px;
    }
}

@media (max-width: 992px) {
    .hero-title {
        font-size: 30px;
    }
}

.gradient-text {
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

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

/* ========================================
   数据统计
   ======================================== */
.stats {
    padding: 60px 0;
    position: relative;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: var(--transition-normal);
    white-space: nowrap;
}

.stat-item:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    font-family: var(--font-cn);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    min-width: 100px;
    text-align: right;
}

.stat-suffix {
    font-size: 18px;
    font-weight: 700;
    color: var(--secondary);
    font-family: var(--font-cn);
}

.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   通用区块标题
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 13px;
    color: var(--secondary);
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ========================================
   核心优势
   ======================================== */
.features {
    padding: var(--section-padding) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: linear-gradient(135deg, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.4) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: 20px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: var(--transition-normal);
}

.feature-card:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-8px);
    box-shadow: var(--shadow-card);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
    margin-bottom: 20px;
}

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

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   产品展示
   ======================================== */
.products {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 102, 255, 0.03) 50%, transparent 100%);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    position: relative;
    padding: 32px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    text-align: center;
    transition: var(--transition-normal);
}

.product-card:hover {
    border-color: var(--primary);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

.product-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, rgba(0, 102, 255, 0.1) 0%, var(--surface) 100%);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    background: var(--primary);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

.product-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.product-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.product-price {
    margin-bottom: 20px;
}

.price-original {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-right: 8px;
}

.price-current {
    font-size: 28px;
    font-weight: 800;
    color: var(--secondary);
    font-family: var(--font-cn);
}

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

/* ========================================
   服务流程
   ======================================== */
.process {
    padding: var(--section-padding) 0;
}

.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
}

.process-step {
    flex: 1;
    max-width: 220px;
    text-align: center;
    padding: 32px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    position: relative;
    transition: var(--transition-normal);
}

.process-step:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.step-number {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--gradient-primary);
    color: white;
    font-size: 12px;
    font-weight: 700;
    font-family: var(--font-cn);
    border-radius: 20px;
}

.step-icon {
    width: 64px;
    height: 64px;
    margin: 20px auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 50%;
}

.step-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--primary);
}

.process-step h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.process-line {
    width: 60px;
    height: 2px;
    background: var(--gradient-primary);
    margin-top: 60px;
    flex-shrink: 0;
    position: relative;
}

.process-line::after {
    content: '';
    position: absolute;
    right: 0;
    top: -4px;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 8px solid var(--secondary);
}

/* ========================================
   CTA 区域
   ======================================== */
.cta {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.1;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--bg-darker);
    border-top: 1px solid var(--border);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--border);
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-domain {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-domain a {
    color: var(--primary);
    font-weight: 600;
}

.footer-domain a:hover {
    color: var(--secondary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-column a:hover {
    color: var(--primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
}

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

.footer-partners {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.partners-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.partner-item {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.partner-separator {
    color: var(--text-muted);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1199px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991px) {
    :root {
        --section-padding: 80px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 767px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background: rgba(10, 14, 39, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px 0;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        display: block;
        padding: 14px 24px;
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .stat-item {
        padding: 24px 16px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        flex-direction: column;
        align-items: center;
    }
    
    .process-line {
        width: 2px;
        height: 40px;
        margin: 0;
        background: var(--gradient-primary);
        transform: rotate(90deg);
    }
    
    .process-line::after {
        display: none;
    }
    
    .cta-actions {
        flex-direction: column;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 479px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 26px;
        white-space: nowrap;
    }
    
    .stat-number {
        font-size: 28px;
        min-width: 70px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   动画增强
   ======================================== */
.feature-card,
.product-card,
.process-step,
.stat-item {
    animation: fadeInUp 0.6s ease both;
}

.feature-card:nth-child(1),
.product-card:nth-child(1),
.process-step:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2),
.product-card:nth-child(2),
.process-step:nth-child(2) { animation-delay: 0.15s; }
.feature-card:nth-child(3),
.product-card:nth-child(3),
.process-step:nth-child(3) { animation-delay: 0.2s; }
.feature-card:nth-child(4),
.product-card:nth-child(4),
.process-step:nth-child(4) { animation-delay: 0.25s; }
.feature-card:nth-child(5) { animation-delay: 0.3s; }
.feature-card:nth-child(6) { animation-delay: 0.35s; }

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}