/* ==================== CSS 变量系统 ==================== */
:root {
    /* 绿色系配色 */
    --v3-color-primary: #10b981;
    --v3-color-primary-dark: #059669;
    --v3-color-primary-light: #34d399;
    --v3-color-secondary: #14b8a6;

    /* 渐变 */
    --v3-gradient-primary: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
    --v3-gradient-hero: linear-gradient(180deg, #ecfdf5 0%, #d1fae5 100%);
    --v3-gradient-card: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    --v3-gradient-glow: radial-gradient(circle at center, rgba(16, 185, 129, 0.15) 0%, transparent 70%);

    /* 背景色 */
    --v3-bg-primary: #ffffff;
    --v3-bg-secondary: #f0fdf4;
    --v3-bg-glass: rgba(255, 255, 255, 0.85);
    --v3-bg-glass-dark: rgba(255, 255, 255, 0.95);

    /* 文字颜色 */
    --v3-text-primary: #022c22;
    --v3-text-secondary: #047857;
    --v3-text-muted: #64748b;
    --v3-text-light: #94a3b8;

    /* 阴影 */
    --v3-shadow-sm: 0 1px 2px 0 rgba(16, 185, 129, 0.05);
    --v3-shadow-md: 0 4px 6px -1px rgba(16, 185, 129, 0.1), 0 2px 4px -2px rgba(16, 185, 129, 0.1);
    --v3-shadow-lg: 0 10px 15px -3px rgba(16, 185, 129, 0.15), 0 4px 6px -4px rgba(16, 185, 129, 0.1);
    --v3-shadow-xl: 0 20px 25px -5px rgba(16, 185, 129, 0.2), 0 8px 10px -6px rgba(16, 185, 129, 0.1);

    /* 间距 */
    --v3-spacing-xs: 0.5rem;
    --v3-spacing-sm: 0.75rem;
    --v3-spacing-md: 1rem;
    --v3-spacing-lg: 1.5rem;
    --v3-spacing-xl: 2rem;
    --v3-spacing-2xl: 3rem;
    --v3-spacing-3xl: 4rem;
    --v3-spacing-4xl: 6rem;

    /* 圆角 */
    --v3-radius-sm: 0.5rem;
    --v3-radius-md: 0.75rem;
    --v3-radius-lg: 1rem;
    --v3-radius-xl: 1.5rem;
    --v3-radius-full: 9999px;

    /* 动画 */
    --v3-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --v3-transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --v3-transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* 字体 */
    --v3-font-display: 'Outfit', sans-serif;
    --v3-font-body: 'Plus Jakarta Sans', sans-serif;
}

/* ==================== 全局样式 ==================== */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--v3-font-body);
    color: var(--v3-text-primary);
    background: var(--v3-gradient-hero);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== 背景粒子效果 ==================== */
.v3-particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.v3-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.6) 0%, transparent 70%);
    border-radius: 50%;
    animation: v3-float 20s infinite;
}

@keyframes v3-float {
    0%, 100% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) scale(1);
        opacity: 0;
    }
}

/* ==================== 导航栏 ==================== */
.v3-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--v3-bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(16, 185, 129, 0.1);
    transition: all var(--v3-transition-base);
}

.v3-navbar.scrolled {
    background: var(--v3-bg-glass-dark);
    box-shadow: var(--v3-shadow-md);
}

.v3-navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.v3-navbar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--v3-text-primary);
    font-family: var(--v3-font-display);
    font-weight: 700;
    font-size: 1.25rem;
    transition: opacity var(--v3-transition-fast);
}

.v3-navbar-logo:hover {
    opacity: 0.8;
}

.v3-navbar-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--v3-gradient-primary);
    border-radius: var(--v3-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--v3-shadow-md);
}

.v3-navbar-nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.v3-navbar-link {
    text-decoration: none;
    color: var(--v3-text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    position: relative;
    transition: color var(--v3-transition-fast);
}

.v3-navbar-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--v3-gradient-primary);
    transition: width var(--v3-transition-base);
}

.v3-navbar-link:hover {
    color: var(--v3-color-primary);
}

.v3-navbar-link:hover::after {
    width: 100%;
}

.v3-navbar-link:focus,
.v3-navbar-link:focus-visible {
    outline: 2px solid var(--v3-color-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

/* ==================== 汉堡菜单 ==================== */
.v3-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
    transition: opacity var(--v3-transition-fast);
}

.v3-menu-toggle:hover {
    opacity: 0.7;
}

.v3-menu-toggle:focus,
.v3-menu-toggle:focus-visible {
    outline: 2px solid var(--v3-color-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

.v3-hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--v3-text-primary);
    position: relative;
    transition: all var(--v3-transition-base);
}

.v3-hamburger::before,
.v3-hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--v3-text-primary);
    transition: all var(--v3-transition-base);
}

.v3-hamburger::before {
    top: -8px;
}

.v3-hamburger::after {
    bottom: -8px;
}

/* 激活状态 */
.v3-menu-toggle[aria-expanded="true"] .v3-hamburger {
    background: transparent;
}

.v3-menu-toggle[aria-expanded="true"] .v3-hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.v3-menu-toggle[aria-expanded="true"] .v3-hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* 导航遮罩层 */
.v3-navbar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--v3-transition-base);
    z-index: 1000;
}

.v3-navbar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ==================== Hero 区域 ==================== */
.v3-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--v3-spacing-4xl) 2rem var(--v3-spacing-3xl);
    text-align: center;
    overflow: hidden;
}

.v3-hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: var(--v3-gradient-glow);
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    animation: v3-pulse 8s ease-in-out infinite;
}

@keyframes v3-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.7;
    }
}

.v3-hero-content {
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.v3-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--v3-gradient-primary);
    color: white;
    border-radius: var(--v3-radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--v3-spacing-xl);
    box-shadow: var(--v3-shadow-lg);
    animation: v3-slideDown 0.6s ease-out;
}

@keyframes v3-slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.v3-hero-title {
    font-family: var(--v3-font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--v3-spacing-lg);
    background: var(--v3-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: v3-fadeInUp 0.8s ease-out 0.2s both;
}

@keyframes v3-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.v3-hero-subtitle {
    font-size: 1.25rem;
    color: var(--v3-text-secondary);
    margin-bottom: var(--v3-spacing-xl);
    animation: v3-fadeInUp 0.8s ease-out 0.4s both;
}

.v3-hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--v3-spacing-2xl);
    margin-bottom: var(--v3-spacing-2xl);
    animation: v3-fadeInUp 0.8s ease-out 0.6s both;
}

.v3-stat-item {
    text-align: center;
}

.v3-stat-number {
    font-family: var(--v3-font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--v3-color-primary);
    display: block;
    line-height: 1;
}

.v3-stat-label {
    font-size: 0.875rem;
    color: var(--v3-text-muted);
    margin-top: 0.25rem;
}

.v3-hero-actions {
    display: flex;
    gap: var(--v3-spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: v3-fadeInUp 0.8s ease-out 0.8s both;
}

.v3-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: var(--v3-radius-full);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--v3-transition-base);
    cursor: pointer;
    border: none;
}

.v3-btn-primary {
    background: var(--v3-gradient-primary);
    color: white;
    box-shadow: var(--v3-shadow-md);
}

.v3-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--v3-shadow-xl);
}

.v3-btn-secondary {
    background: white;
    color: var(--v3-text-primary);
    border: 2px solid var(--v3-color-primary);
}

.v3-btn-secondary:hover {
    background: var(--v3-bg-secondary);
    border-color: var(--v3-color-primary-dark);
}

/* 按钮焦点状态 */
.v3-btn:focus,
.v3-btn:focus-visible {
    outline: 2px solid var(--v3-color-primary);
    outline-offset: 2px;
}

/* ==================== 工具区域 ==================== */
.v3-tools-section {
    padding: var(--v3-spacing-4xl) 2rem;
    position: relative;
    z-index: 1;
}

.v3-tools-section-alt {
    background: var(--v3-bg-secondary);
}

.v3-section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.v3-section-header {
    text-align: center;
    margin-bottom: var(--v3-spacing-3xl);
}

.v3-section-icon {
    font-size: 3rem;
    margin-bottom: var(--v3-spacing-md);
}

.v3-section-title {
    font-family: var(--v3-font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--v3-text-primary);
    margin-bottom: var(--v3-spacing-sm);
}

.v3-section-description {
    font-size: 1.125rem;
    color: var(--v3-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.v3-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--v3-spacing-xl);
}

.v3-tool-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--v3-radius-xl);
    padding: var(--v3-spacing-xl);
    transition: all var(--v3-transition-base);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

.v3-tool-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.v3-tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--v3-shadow-xl);
    border-color: var(--v3-color-primary);
}

/* 卡片光泽效果 */
.v3-tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transition: left 0.6s ease;
    pointer-events: none;
    z-index: 1;
}

.v3-tool-card:hover::before {
    left: 100%;
}

/* 图标脉冲动画 */
.v3-tool-card:hover .v3-tool-icon {
    animation: v3-iconPulse 0.6s ease-out;
}

@keyframes v3-iconPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* 卡片焦点环 */
.v3-tool-card:focus-within {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
}

.v3-tool-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--v3-spacing-md);
}

.v3-tool-icon {
    width: 56px;
    height: 56px;
    background: var(--v3-gradient-primary);
    border-radius: var(--v3-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    box-shadow: var(--v3-shadow-md);
}

.v3-tool-badge {
    padding: 0.375rem 0.75rem;
    background: var(--v3-gradient-primary);
    color: white;
    border-radius: var(--v3-radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.v3-tool-title {
    font-family: var(--v3-font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--v3-text-primary);
    margin-bottom: var(--v3-spacing-sm);
}

.v3-tool-description {
    color: var(--v3-text-secondary);
    margin-bottom: var(--v3-spacing-md);
    line-height: 1.7;
}

.v3-tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--v3-spacing-lg);
}

.v3-feature-tag {
    padding: 0.375rem 0.75rem;
    background: var(--v3-bg-secondary);
    color: var(--v3-text-secondary);
    border-radius: var(--v3-radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all var(--v3-transition-fast);
    cursor: default;
}

.v3-feature-tag:hover {
    background: var(--v3-color-primary);
    color: white;
    transform: scale(1.05);
}

.v3-tool-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--v3-color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--v3-transition-fast);
}

.v3-tool-link:hover {
    color: var(--v3-color-primary-dark);
    gap: 0.75rem;
}

.v3-tool-link:focus,
.v3-tool-link:focus-visible {
    outline: 2px solid var(--v3-color-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ==================== 页脚 ==================== */
.v3-footer {
    background: var(--v3-text-primary);
    color: white;
    padding: var(--v3-spacing-4xl) 2rem var(--v3-spacing-xl);
    position: relative;
    z-index: 1;
}

.v3-footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.v3-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--v3-spacing-3xl);
    margin-bottom: var(--v3-spacing-3xl);
}

.v3-footer-col h4 {
    font-family: var(--v3-font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--v3-spacing-md);
}

.v3-footer-col p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.v3-footer-col a {
    color: var(--v3-color-primary-light);
    text-decoration: none;
    transition: color var(--v3-transition-fast);
}

.v3-footer-col a:hover {
    color: var(--v3-color-primary);
}

.v3-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.v3-tech-tag {
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.2);
    color: var(--v3-color-primary-light);
    border-radius: var(--v3-radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

.v3-footer-bottom {
    text-align: center;
    padding-top: var(--v3-spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    /* 汉堡菜单 */
    .v3-menu-toggle {
        display: block;
    }

    .v3-navbar-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--v3-bg-glass-dark);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        gap: 1.5rem;
        transition: right var(--v3-transition-base);
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
    }

    .v3-navbar-nav.active {
        right: 0;
    }

    .v3-navbar-nav {
        gap: 1.5rem;
    }

    .v3-navbar-link {
        font-size: 1.125rem;
        padding: 0.75rem 0;
    }

    .v3-hero-stats {
        flex-direction: column;
        gap: var(--v3-spacing-lg);
    }

    .v3-tools-grid {
        grid-template-columns: 1fr;
    }

    .v3-hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .v3-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ==================== 细节打磨 ==================== */

/* 选中文本样式 */
::selection {
    background: var(--v3-color-primary);
    color: white;
}

::-moz-selection {
    background: var(--v3-color-primary);
    color: white;
}

/* 全局焦点可见样式 */
:focus-visible {
    outline: 2px solid var(--v3-color-primary);
    outline-offset: 2px;
}

/* 页面加载动画 */
.v3-page-loading {
    opacity: 0;
}

.v3-page-loaded {
    animation: v3-pageFadeIn 0.5s ease-out;
}

@keyframes v3-pageFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==================== 可访问性 - 尊重用户动画偏好 ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .v3-particles-container {
        display: none;
    }

    .v3-tool-card {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ==================== 自定义滚动条 (Webkit浏览器) ==================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--v3-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--v3-color-primary);
    border-radius: 5px;
    border: 2px solid var(--v3-bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--v3-color-primary-dark);
}