/* --- 全局视觉规范 --- */
:root {
    --primary: #4361ee;
    --accent: #4cc9f0;
    --bg: #f8f9fa;
    --card-white: #ffffff;
    --text: #2b2d42;
    --muted: #8d99ae;
    --shadow: 0 10px 30px rgba(0,0,0,0.05);
    --border: rgba(0,0,0,0.05);
    --note-bg: #f1f4f9;
}

[data-theme="dark"] {
    --bg: #121212;
    --card-white: #1e1e1e;
    --text: #f8f9fa;
    --muted: #9ca3af;
    --shadow: 0 10px 30px rgba(0,0,0,0.4);
    --border: rgba(255,255,255,0.1);
    --note-bg: #2d2d2d;
}

/* 🌟 核心修正：防止水平溢�?*/
* {
    box-sizing: border-box;
}

/* 🌟 入场动画 */
@keyframes pageReveal {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 🌟 绿色呼吸灯动�?*/
@keyframes statusPulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* 🌟 方案 A：活泼跳动动�?(Bounce) */
@keyframes iconBounce {
    0%, 100% { 
        transform: translateY(0); 
    }
    50% { 
        transform: translateY(-12px); /* 向上弹跳的距�?*/
    }
}

/* 🌟 全局过渡控制 */
body, .tool-card, .tool-main-box, .info-section, .info-note, input, h1, h2, .lang-switcher, #theme-toggle, footer, .social-icon, .copy-btn {
    transition: background-color 0.3s ease, 
                color 0.3s ease, 
                border-color 0.3s ease, 
                box-shadow 0.3s ease,
                transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); /* 优化弹性过�?*/
}

body {
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 20px 15px 60px; 
    animation: pageReveal 0.4s ease-out;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* --- 顶部控制栏布局 --- */
.header-controls {
    width: 100%;
    max-width: 900px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 10px auto 20px;
    gap: 10px;
}

.nav-home {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
    padding: 8px 16px;
    border-radius: 12px;
    background: var(--card-white);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    min-width: 100px;
    flex-shrink: 0;
}

.nav-home .text { 
    font-size: 0.9rem; 
    font-weight: 700;
}

.nav-home:hover {
    color: var(--primary);
    transform: translateY(-2px);
    border-color: var(--primary);
}

/* --- 品牌头部展示 --- */
.brand-header {
    text-align: center;
    margin-bottom: 40px;
    width: 100%;
}

h1 {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    font-size: clamp(2rem, 8vw, 2.8rem); 
    margin: 0;
    letter-spacing: -1.5px;
}

.brand-subtitle {
    font-size: 0.85rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 5px;
    font-weight: 500;
}

/* --- 切换器与按钮 --- */
.lang-switcher {
    display: flex;
    background: var(--note-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 3px;
    flex-shrink: 0;
}

.lang-switcher button {
    width: auto; 
    padding: 6px 15px;
    background: transparent;
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 700; 
    border-radius: 9px;
    cursor: pointer;
    border: none;
}

html[data-lang="en"] #btn-en,
html[data-lang="zh"] #btn-zh {
    background: var(--primary);
    color: white !important;
}

#theme-toggle {
    width: auto;
    background: var(--card-white);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 8px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    border-radius: 12px;
    box-shadow: var(--shadow);
    cursor: pointer;
}

/* --- 主体容器 --- */
.tool-main-box {
    background: var(--card-white);
    padding: 30px 20px;
    border-radius: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 480px;
    margin-bottom: 15px;
}

.menu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    width: 100%;
    max-width: 900px;
}

.tool-card {
    background: var(--card-white);
    padding: 40px 25px;
    border-radius: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 🌟 图标基础样式 */
.card-icon {
    display: inline-block;
    font-size: 2rem;
    margin-bottom: 5px;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 5px 15px rgba(0,0,0,0.08)); /* �?Emoji 加一点点若有若无的阴影，会更有立体感 */
}

.card-icon.logo-icon {
    line-height: 0;
}

.card-icon.logo-icon img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    display: block;
}
.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    border-color: var(--primary);
}

/* 🌟 悬停触发弹跳 */
.tool-card:hover .card-icon {
    animation: iconBounce 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) infinite;
}

/* --- 分享组件样式 --- */
.share-container {
    margin: 15px auto;
    text-align: center;
    max-width: 440px;
    width: 100%;
}

.share-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 15px;
}

.share-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.share-btn.copy-btn {
    width: auto;
    padding: 10px 18px;
    font-size: 0.85rem;
    background: var(--card-white);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 600;
}

.share-btn.copy-btn:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    color: var(--primary);
}

.social-group {
    display: flex;
    gap: 12px;
}

.social-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-white);
    border: 1px solid var(--border);
    border-radius: 50%;
    box-shadow: var(--shadow);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.social-icon svg {
    width: 20px;
    height: 20px;
    fill: var(--text);
    transition: all 0.3s ease;
    z-index: 2;
}

/* --- 各平台专属悬停高级特�?--- */

.social-icon:hover#share-facebook {
    background-color: #1877f2;
    border-color: #1877f2;
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 20px rgba(24, 119, 242, 0.3);
}
.social-icon:hover#share-facebook svg { fill: #ffffff; }

.social-icon:hover#share-twitter {
    background-color: #000000;
    border-color: #000000;
    transform: translateY(-5px) scale(1.1);
}
[data-theme="dark"] .social-icon:hover#share-twitter { background-color: #ffffff; }
.social-icon:hover#share-twitter svg { fill: #ffffff; }
[data-theme="dark"] .social-icon:hover#share-twitter svg { fill: #000000; }

.social-icon:hover#share-instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    border-color: transparent;
    transform: translateY(-5px) scale(1.1);
}
.social-icon:hover#share-instagram svg { fill: #ffffff; }

.social-icon:hover#share-whatsapp {
    background-color: #25d366;
    border-color: #25d366;
    transform: translateY(-5px) scale(1.1);
}
.social-icon:hover#share-whatsapp svg { fill: #ffffff; }

.social-icon:hover#share-reddit {
    background-color: #ff4500;
    border-color: #ff4500;
    transform: translateY(-5px) scale(1.1);
}
.social-icon:hover#share-reddit svg { fill: #ffffff; }

/* --- 基础交互元素 --- */
button {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 800;
    cursor: pointer;
}

input {
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    background: var(--card-white);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    outline: none;
    font-size: 1rem;
}

/* 信息板块 */
.info-section {
    max-width: 800px;
    width: 100%; 
    margin: 15px auto 15px;
    background: var(--card-white);
    padding: 30px 20px;
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.info-title {
    color: var(--text);
    font-size: 1.3rem;
    font-weight: 700;
    border-left: 5px solid var(--primary); 
    padding-left: 15px;
    margin-bottom: 15px;
}

.info-note {
    padding: 20px;
    background: var(--note-bg); 
    border-radius: 16px;
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.6;
}

/* SEO long-form content area (tool pages) */
.tool-page-article {
    max-width: 720px;
    margin: 50px auto 40px;
    padding: 0 20px;
    text-align: left;
}
.tool-page-article h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text);
}
.tool-page-article h3 {
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
    color: var(--text);
}
.tool-page-article p {
    color: var(--muted);
    line-height: 1.8;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.status {
    font-size: 0.7rem;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(52, 211, 153, 0.1); 
    color: #10b981;
    font-weight: 700;
    display: inline-block;
    animation: statusPulse 2.5s infinite ease-in-out; 
}

/* --- 页脚 --- */
footer {
    margin-top: 60px;
    text-align: center;
    width: 100%;
    max-width: 900px;
    padding: 30px 10px;
    border-top: 1px solid var(--border);
}

.footer-copy {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-copy p {
    color: var(--muted) !important; 
    font-size: 0.75rem;
    margin: 0;
    font-weight: 400;
}

.footer-copy strong {
    color: var(--muted);
    font-weight: 600;
}

.footer-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.85rem;
    margin: 0 10px;
}

/* --- 移动端适配 --- */
@media (max-width: 480px) {
    h1 { font-size: 2.1rem; }
    .header-controls { flex-wrap: nowrap; gap: 5px; }
    .nav-home { min-width: 80px; padding: 8px 10px; }
    .nav-home .text { font-size: 0.85rem; }
    .lang-switcher button { padding: 6px 10px; font-size: 0.75rem; }
    #theme-toggle { padding: 8px 10px; font-size: 0.8rem; }
    .tool-main-box, .info-section { padding: 25px 15px; }
}