/* ========================================
   非凡工造 - FEIFANGONGZAO
   Apple 极简风格展示网页样式
   ======================================== */

/* Tailwind CSS CDN */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

/* ========== CSS 自定义属性（设计 Token） ========== */
:root {
    /* 颜色系统 */
    --color-primary: #000000;
    --color-accent: #007AFF;
    --color-success: #34C759;
    --color-danger: #FF3B30;
    
    /* 背景色 */
    --bg-white: #FFFFFF;
    --bg-light: #F5F5F7;
    --bg-dark: #1D1D1F;
    --bg-darker: #0a0a0c;
    
    /* 文字颜色 */
    --text-primary: #1D1D1F;
    --text-secondary: #6E6E73;
    --text-tertiary: #86868B;
    --text-white: #FFFFFF;
    
    /* 功能色 */
    --border-light: rgba(0, 0, 0, 0.04);
    --glass-bg: rgba(255, 255, 255, 0.72);
    
    /* 字体 */
    --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 间距 */
    --section-padding: 120px;
    --container-max: 1280px;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ========== 全局基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

::selection {
    background-color: rgba(0, 122, 255, 0.2);
    color: inherit;
}

/* ========== 导航栏样式 ========== */
#navbar {
    transition: var(--transition-base);
}

#navbar.scrolled {
    background: rgba(17, 17, 17, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#navbar.scrolled .nav-link {
    color: rgba(255, 255, 255, 0.85);
}

#navbar.scrolled .nav-link:hover,
#navbar.scrolled .nav-link.active {
    color: #ffffff;
}

.nav-link {
    position: relative;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    letter-spacing: 0.02em;
    padding: 8px 0;
    transition: var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    transition: transform 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #ffffff;
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* 汉堡菜单 */
.hamburger-line {
    display: block;
    width: 22px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: var(--transition-base);
}

.menu-open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.menu-open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav-link {
    display: block;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 12px 0;
    transition: var(--transition-base);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-link:hover {
    color: white;
    padding-left: 8px;
}

/* ========== Hero 区域样式 ========== */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-title {
    font-size: clamp(48px, 10vw, 88px);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.05;
}

.hero-subtitle {
    font-weight: 300;
}

/* Hero 背景装饰球 */
.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float-orb 20s ease-in-out infinite;
}

.hero-orb-1 {
    width: 600px;
    height: 600px;
    top: -200px;
    right: -100px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.15), transparent 70%);
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    bottom: -150px;
    left: -100px;
    background: radial-gradient(circle, rgba(52, 199, 89, 0.1), transparent 70%);
    animation-delay: -10s;
}

@keyframes float-orb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* 网格叠加 */
.hero-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

/* CTA 按钮 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 36px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--color-accent), #5856d6);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: var(--transition-base);
    box-shadow: 0 4px 24px rgba(0, 122, 255, 0.35);
    cursor: pointer;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 32px rgba(0, 122, 255, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 36px;
    font-size: 16px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* ========== 动画定义 ========== */
.animate-fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.animation-delay-200 {
    animation-delay: 0.2s !important;
}

.animation-delay-400 {
    animation-delay: 0.4s !important;
}

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

/* 滚动触发动画 */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal.revealed[style*="animation-delay"] {
    transition-delay: var(--delay, 0s);
}

/* ========== Section 通用样式 ========== */
.section-padding {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
    padding: 6px 18px;
    background: rgba(0, 122, 255, 0.08);
    border-radius: var(--radius-full);
}

.section-title {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.15;
    color: var(--text-primary);
}

.section-title span {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== 关于我们区域 ========== */
.feature-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 28px 32px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 122, 255, 0.15);
}

.feature-icon-wrapper {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.08), rgba(88, 86, 214, 0.08));
    transition: var(--transition-base);
}

.feature-card:hover .feature-icon-wrapper {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.15), rgba(88, 86, 214, 0.15));
    transform: scale(1.05);
}

.feature-icon {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

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

/* 统计数字 */
.stat-item {
    text-align: center;
}

.stat-number {
    font-size: clamp(32px, 4vw, 44px);
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-number::after {
    content: '+';
    font-size: 0.65em;
    vertical-align: super;
}

.stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 8px;
    font-weight: 500;
}

/* ========== 联系我们 / 页脚 ========== */
footer {
    position: relative;
}

.footer-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.06), transparent 60%);
    pointer-events: none;
}

.contact-card {
    text-align: center;
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition-base);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
}

.contact-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.2), rgba(88, 86, 214, 0.2));
    color: #60a5fa;
    transition: var(--transition-base);
}

.contact-card:hover .contact-icon-wrap {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.25);
}

/* 社交图标 */
.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-decoration: none;
    transition: var(--transition-base);
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.12);
    color: white;
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.2);
}

.social-icon svg {
    width: 20px;
    height: 20px;
}

/* ========== 响应式设计 ========== */

/* 大屏 (≥1400px) */
@media (min-width: 1400px) {
    :root {
        --section-padding: 140px;
    }
}

/* 平板 (≤1024px) */
@media (max-width: 1024px) {
    :root {
        --section-padding: 96px;
    }

    .hero-title {
        font-size: clamp(40px, 8vw, 64px);
    }

    .section-title {
        font-size: clamp(28px, 5vw, 42px);
    }
}

/* 小平板/大手机 (≤768px) */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 280px;
    }

    .feature-card {
        padding: 22px 24px;
    }

    .stat-item {
        padding: 12px 0;
    }
}

/* 手机 (≤480px) */
@media (max-width: 480px) {
    :root {
        --section-padding: 64px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-title {
        font-size: 38px;
    }

    .section-title {
        font-size: 28px;
    }

    .contact-card {
        padding: 24px 16px;
    }

    .feature-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

/* 减少动画偏好支持 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .animate-fade-in-up {
        opacity: 1;
        transform: none;
    }
}