/* 全局重置与基础样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.85);
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --accent: #e94560;
    --accent-hover: #ff6b81;
    --accent-glow: rgba(233, 69, 96, 0.4);
    --gradient-1: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-2: linear-gradient(135deg, #e94560 0%, #c23152 50%, #a01e3e 100%);
    --gradient-banner: linear-gradient(135deg, #1a1a2e 0%, #0f3460 40%, #e94560 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 12px 48px rgba(233, 69, 96, 0.2);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* 亮色模式 */
[data-theme="light"] {
    --bg-primary: #f5f5fa;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.9);
    --text-primary: #1a1a2e;
    --text-secondary: #555;
    --accent: #e94560;
    --accent-hover: #c23152;
    --accent-glow: rgba(233, 69, 96, 0.3);
    --gradient-1: linear-gradient(135deg, #ffffff 0%, #f0f0f5 50%, #e8e8f0 100%);
    --gradient-2: linear-gradient(135deg, #e94560 0%, #d43b56 50%, #b82e4a 100%);
    --gradient-banner: linear-gradient(135deg, #ffffff 0%, #f0f0f5 40%, #e94560 100%);
    --glass-bg: rgba(0, 0, 0, 0.03);
    --glass-border: rgba(0, 0, 0, 0.08);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 48px rgba(233, 69, 96, 0.15);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

/* 滚动条 */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-hover); }

/* 滚动动画基础 */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 头部 */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: background var(--transition), border var(--transition);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

nav > a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.2rem;
    transition: color var(--transition);
}
nav > a:hover { color: var(--accent); }
nav > a svg { flex-shrink: 0; }

nav ul {
    display: flex;
    list-style: none;
    gap: 8px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    font-size: 0.95rem;
    position: relative;
}
nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform var(--transition);
}
nav ul li a:hover {
    color: var(--accent);
    background: var(--glass-bg);
}
nav ul li a:hover::after { transform: scaleX(1); }

#darkModeToggle, #mobileMenuToggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}
#darkModeToggle:hover, #mobileMenuToggle:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: scale(1.1);
}

#mobileMenuToggle { display: none; }

/* 主内容 */
main {
    padding-top: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* Hero */
#hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 80px 0 60px;
    min-height: 80vh;
    position: relative;
    overflow: hidden;
}
#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-banner);
    opacity: 0.1;
    animation: heroGlow 8s ease-in-out infinite alternate;
    z-index: -1;
    border-radius: 50%;
}
@keyframes heroGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(10%, 10%) scale(1.2); }
}

#hero > div {
    flex: 1;
    max-width: 600px;
}
#hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 24px;
}
#hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}
#hero a {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin-right: 16px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
#hero a:first-of-type {
    background: var(--gradient-2);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
#hero a:first-of-type:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px var(--accent-glow);
}
#hero a:last-of-type {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}
#hero a:last-of-type:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
#hero svg {
    flex-shrink: 0;
    width: 400px;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    background: var(--bg-secondary);
    transition: transform var(--transition);
}
#hero svg:hover { transform: scale(1.02); }

/* 通用section */
section {
    padding: 80px 0;
    scroll-margin-top: 80px;
}
section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}
section > p {
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 40px;
    font-size: 1.05rem;
}

/* About */
#about p {
    margin-bottom: 16px;
    line-height: 1.8;
}

/* Products / Solutions 卡片网格 */
#products > div, #solutions > div {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
#products article, #solutions article {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 32px 24px;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}
#products article::before, #solutions article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transition: transform var(--transition);
}
#products article:hover::before, #solutions article:hover::before { transform: scaleX(1); }
#products article:hover, #solutions article:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}
#products article h3, #solutions article h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}
#products article p, #solutions article p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Features */
#features ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    list-style: none;
}
#features ul li {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    font-weight: 500;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    position: relative;
}
#features ul li::before {
    content: '✓';
    display: block;
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 8px;
}
#features ul li:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

/* Testimonials */
#testimonials blockquote {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px 32px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    position: relative;
}
#testimonials blockquote::before {
    content: '"';
    font-size: 3rem;
    color: var(--accent);
    position: absolute;
    top: 8px;
    left: 16px;
    opacity: 0.3;
    font-family: serif;
}
#testimonials blockquote p {
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
}
#testimonials blockquote:hover {
    transform: translateX(8px);
    border-color: var(--accent);
}

/* Resources */
#resources {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
#resources > h2 {
    grid-column: 1 / -1;
    margin-bottom: 0;
}
#resources article {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}
#resources article h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}
#resources article p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex: 1;
    margin-bottom: 16px;
}
#resources article a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    align-self: flex-start;
    padding: 6px 0;
    position: relative;
}
#resources article a::after {
    content: '→';
    margin-left: 4px;
    transition: margin var(--transition);
}
#resources article a:hover::after { margin-left: 8px; }
#resources article:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

/* FAQ */
#faq details {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow);
}
#faq details[open] {
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}
#faq summary {
    padding: 16px 24px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: color var(--transition);
    list-style: none;
}
#faq summary::-webkit-details-marker { display: none; }
#faq summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent);
    transition: transform var(--transition);
}
#faq details[open] summary::after { transform: rotate(45deg); }
#faq summary:hover { color: var(--accent); }
#faq details p {
    padding: 0 24px 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* HowTo */
#howto ol {
    counter-reset: step;
    list-style: none;
    display: grid;
    gap: 16px;
}
#howto ol li {
    counter-increment: step;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 20px 24px 20px 60px;
    position: relative;
    transition: all var(--transition);
    box-shadow: var(--shadow);
}
#howto ol li::before {
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: var(--gradient-2);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}
#howto ol li strong {
    color: var(--accent);
}
#howto ol li:hover {
    transform: translateX(8px);
    border-color: var(--accent);
}

/* Contact */
#contact address p {
    margin-bottom: 8px;
    color: var(--text-secondary);
}
#contact address a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}
#contact address a:hover { color: var(--accent-hover); }

#contact form {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 32px;
    margin-top: 32px;
    box-shadow: var(--shadow);
    max-width: 600px;
}
#contact form label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    color: var(--text-primary);
}
#contact form input,
#contact form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border var(--transition), box-shadow var(--transition);
    margin-bottom: 16px;
    font-family: inherit;
}
#contact form input:focus,
#contact form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
#contact form textarea { resize: vertical; min-height: 100px; }
#contact form button {
    background: var(--gradient-2);
    color: #fff;
    border: none;
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 20px var(--accent-glow);
}
#contact form button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px var(--accent-glow);
}

/* 页脚 */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 40px 24px;
    text-align: center;
    margin-top: 40px;
}
footer nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px 24px;
    margin-bottom: 20px;
}
footer nav ul li a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color var(--transition);
    font-size: 0.9rem;
}
footer nav ul li a:hover { color: var(--accent); }
footer p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* 返回顶部 */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-2);
    color: #fff;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 20px var(--accent-glow);
    transition: all var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}
#backToTop.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
#backToTop:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 8px 32px var(--accent-glow);
}

/* 响应式 */
@media (max-width: 768px) {
    nav { padding: 0 16px; }
    nav ul { display: none; }
    #mobileMenuToggle { display: flex; }
    nav ul.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--glass-border);
        padding: 16px;
        gap: 4px;
    }
    nav ul.open li a { padding: 12px 16px; }

    #hero {
        flex-direction: column;
        text-align: center;
        padding: 60px 0 40px;
        min-height: auto;
    }
    #hero h1 { font-size: 2rem; }
    #hero p { margin: 0 auto 24px; }
    #hero svg { width: 100%; max-width: 350px; }
    #hero a { margin-bottom: 12px; }

    section { padding: 60px 0; }
    section h2 { font-size: 1.8rem; }

    #products > div, #solutions > div, #resources {
        grid-template-columns: 1fr;
    }
    #features ul { grid-template-columns: 1fr 1fr; }

    #howto ol li { padding-left: 56px; }

    #contact form { padding: 24px; }

    footer nav ul { gap: 8px 16px; }

    #backToTop {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    #hero h1 { font-size: 1.6rem; }
    #features ul { grid-template-columns: 1fr; }
    section h2 { font-size: 1.5rem; }
}

/* 动画增强 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
#hero > div { animation: fadeInUp 0.8s ease; }
#hero svg { animation: fadeInUp 0.8s ease 0.2s both; }