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

:root {
    --bg-dark: #0b0b1a;
    --bg-card: rgba(26, 26, 46, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #f0f0f5;
    --text-secondary: #b0b0c5;
    --accent-1: #6c63ff;
    --accent-2: #ff6584;
    --accent-3: #00d4aa;
    --gradient-banner: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
    --radius-card: 20px;
    --radius-sm: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-1);
    border-radius: 4px;
}

/* 通用卡片样式 */
section {
    padding: 4rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: 0.02em;
}

h1 {
    font-size: clamp(2rem, 6vw, 3.5rem);
    background: linear-gradient(135deg, #f0f0f5, #6c63ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
}

h2 {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--accent-1);
    border-radius: 2px;
}

h3 {
    font-size: 1.3rem;
    color: var(--accent-3);
    margin-bottom: 0.8rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    max-width: 75ch;
}

a {
    color: var(--accent-1);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--accent-2);
}

ul, ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}
li {
    margin-bottom: 0.5rem;
}

/* 按钮 */
[role="button"], button, .btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--accent-1), #8b7aff);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
    text-decoration: none;
}
[role="button"]:hover, button:hover, .btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.5);
    color: #fff;
}
[role="button"]:nth-child(2) {
    background: linear-gradient(135deg, var(--accent-2), #ff8a9e);
    box-shadow: 0 4px 20px rgba(255, 101, 132, 0.3);
    margin-left: 1rem;
}
[role="button"]:nth-child(2):hover {
    box-shadow: 0 8px 30px rgba(255, 101, 132, 0.5);
}

/* 导航栏 */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 11, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0 1.5rem;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0.8rem 0;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem 1rem;
    justify-content: center;
    padding: 0;
    margin: 0;
}

nav a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.4rem 0.6rem;
    border-radius: 8px;
    transition: all var(--transition);
    position: relative;
}

nav a:hover, nav a[aria-current="page"] {
    color: var(--text-primary);
    background: var(--bg-glass);
}

nav a[aria-current="page"] {
    color: var(--accent-1);
}

/* 英雄区域 - 渐变Banner */
#hero {
    text-align: center;
    padding: 6rem 1.5rem 4rem;
    background: var(--gradient-banner);
    border-radius: 0 0 40px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(108, 99, 255, 0.15), transparent 60%),
                radial-gradient(circle at 70% 80%, rgba(255, 101, 132, 0.1), transparent 50%);
    animation: floatGlow 8s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(20px, -20px) scale(1.1); }
}

#hero h1 {
    font-size: clamp(2.2rem, 7vw, 4rem);
    margin-bottom: 1.2rem;
}

#hero p {
    max-width: 700px;
    margin: 0 auto 2rem;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
}

#hero img {
    margin-top: 2rem;
    max-width: 100%;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform var(--transition);
}

#hero img:hover {
    transform: scale(1.02);
}

/* 关于 / 卡片区域 */
#about, #company, #products, #services, #solutions, #industries, #features, #benefits, #workflow, #faq, #howto, #knowledge-center, #contact {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-card);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.6s ease forwards;
}

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

section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.2s; }
section:nth-child(4) { animation-delay: 0.3s; }
section:nth-child(5) { animation-delay: 0.4s; }
section:nth-child(6) { animation-delay: 0.5s; }
section:nth-child(7) { animation-delay: 0.6s; }
section:nth-child(8) { animation-delay: 0.7s; }

#about:hover, #company:hover, #products:hover, #services:hover, #solutions:hover, #industries:hover, #features:hover, #benefits:hover, #workflow:hover, #faq:hover, #howto:hover, #knowledge-center:hover, #contact:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
}

/* 文章卡片 */
article {
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: background var(--transition);
}

article:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* 产品特色列表 */
#products ul, #features ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

#products ul li, #features ul li {
    background: var(--bg-glass);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition);
}

#products ul li:hover, #features ul li:hover {
    background: rgba(108, 99, 255, 0.2);
    border-color: var(--accent-1);
    transform: scale(1.05);
}

/* 服务列表 */
#services ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

#services ul li {
    background: var(--bg-glass);
    padding: 1rem 1.2rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    border-left: 3px solid var(--accent-1);
}

#services ul li:hover {
    background: rgba(108, 99, 255, 0.15);
    transform: translateX(5px);
}

/* FAQ details */
details {
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    margin-bottom: 0.8rem;
    padding: 0.8rem 1.2rem;
    transition: all var(--transition);
    cursor: pointer;
}

details[open] {
    background: rgba(108, 99, 255, 0.15);
    padding-bottom: 1.2rem;
}

summary {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.05rem;
    outline: none;
    transition: color var(--transition);
}

details[open] summary {
    color: var(--accent-1);
}

details p {
    margin-top: 0.8rem;
    padding-top: 0.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 流程列表 */
#workflow ol, #howto ol {
    list-style-position: inside;
    padding: 0;
    counter-reset: step;
}

#workflow ol li, #howto ol li {
    counter-increment: step;
    padding: 0.8rem 1rem;
    margin-bottom: 0.5rem;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

#workflow ol li:hover, #howto ol li:hover {
    background: rgba(108, 99, 255, 0.15);
    transform: translateX(8px);
}

#workflow ol li::before, #howto ol li::before {
    content: counter(step) ". ";
    font-weight: 700;
    color: var(--accent-1);
}

/* 知识中心链接 */
#knowledge-center ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

#knowledge-center ul li {
    background: var(--bg-glass);
    border-radius: 50px;
    padding: 0.4rem 1rem;
    transition: all var(--transition);
}

#knowledge-center ul li:hover {
    background: rgba(108, 99, 255, 0.2);
    transform: scale(1.05);
}

#knowledge-center ul li a {
    color: var(--text-secondary);
}

#knowledge-center ul li a:hover {
    color: var(--accent-1);
}

/* 联系信息 */
#contact ul {
    list-style: none;
    padding: 0;
}

#contact ul li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: padding-left var(--transition);
}

#contact ul li:hover {
    padding-left: 0.5rem;
    border-bottom-color: var(--accent-1);
}

/* aside 相关资源 */
aside {
    background: var(--bg-glass);
    border-radius: var(--radius-card);
    padding: 1.5rem 2rem;
    margin: 0 1.5rem 2rem;
    text-align: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

aside p {
    margin: 0;
    color: var(--text-secondary);
}

aside a {
    margin: 0 0.5rem;
    font-weight: 500;
}

/* 页脚 */
footer {
    background: rgba(11, 11, 26, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 2rem 1.5rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

footer nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 2rem;
    padding: 0;
    margin-bottom: 1rem;
}

footer nav a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer nav a:hover {
    color: var(--accent-1);
}

footer p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
}

/* 法律信息隐藏 */
#legal[hidden] {
    display: none;
}

/* 响应式布局 */
@media (max-width: 768px) {
    header {
        padding: 0 1rem;
    }
    nav ul {
        gap: 0.2rem 0.6rem;
    }
    nav a {
        font-size: 0.8rem;
        padding: 0.3rem 0.5rem;
    }
    section {
        padding: 2rem 1rem;
    }
    #hero {
        padding: 4rem 1rem 3rem;
    }
    #hero h1 {
        font-size: 2rem;
    }
    #hero p {
        font-size: 1rem;
    }
    [role="button"] {
        display: block;
        width: 80%;
        margin: 0.5rem auto !important;
        text-align: center;
    }
    #about, #company, #products, #services, #solutions, #industries, #features, #benefits, #workflow, #faq, #howto, #knowledge-center, #contact {
        padding: 1.5rem;
    }
    #services ul {
        grid-template-columns: 1fr;
    }
    aside {
        margin: 0 1rem 1.5rem;
        padding: 1rem;
    }
    footer {
        padding: 1.5rem 1rem;
    }
    footer nav ul {
        gap: 0.5rem 1rem;
    }
}

@media (max-width: 480px) {
    nav ul {
        justify-content: center;
        gap: 0.2rem 0.4rem;
    }
    nav a {
        font-size: 0.75rem;
        padding: 0.2rem 0.4rem;
    }
    h1 {
        font-size: 1.6rem;
    }
    h2 {
        font-size: 1.3rem;
    }
    #products ul, #features ul {
        flex-direction: column;
    }
    #products ul li, #features ul li {
        text-align: center;
    }
    #knowledge-center ul {
        flex-direction: column;
        align-items: center;
    }
}

/* 暗色模式支持（默认就是暗色，但保留媒体查询兼容） */
@media (prefers-color-scheme: light) {
    :root {
        --bg-dark: #0b0b1a;
        --bg-card: rgba(26, 26, 46, 0.9);
        --text-primary: #f0f0f5;
        --text-secondary: #b0b0c5;
    }
    body {
        background: var(--bg-dark);
    }
    /* 保持暗色主题，不切换亮色 */
}

/* 滚动动画增强 - 使用IntersectionObserver兼容，已用CSS动画 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}