/* 全局重置与变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f8f6fc;
    --text: #1f1b2e;
    --primary: #3b2b7a;
    --accent: #f5c542;
    --accent2: #e8a838;
    --glass: rgba(255, 255, 255, 0.25);
    --glass-dark: rgba(20, 15, 35, 0.6);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.15);
    --radius: 28px;
    --radius-sm: 16px;
    --font: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --banner-gradient: radial-gradient(circle at 20% 40%, #2b1f5e, #0f0b1a 80%);
}

body.dark {
    --bg: #0f0b1a;
    --text: #e9e4f0;
    --glass: var(--glass-dark);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
    --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.8);
    --banner-gradient: radial-gradient(circle at 20% 40%, #2b1f5e, #0f0b1a 90%);
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    transition: background var(--transition), color var(--transition);
    line-height: 1.5;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px;
}

/* 头部导航 */
header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    background: rgba(255, 255, 255, 0.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    transition: background var(--transition), border-color var(--transition);
}

body.dark header {
    background: rgba(15, 11, 26, 0.7);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    flex-wrap: wrap;
    gap: 12px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #3b2b7a, #f5c542);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    cursor: default;
    user-select: none;
}

.nav-links {
    display: flex;
    gap: 1.2rem;
    list-style: none;
    flex-wrap: wrap;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 40px;
    transition: all var(--transition);
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: transform var(--transition);
}

.nav-links a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-links a:hover {
    background: var(--accent);
    color: #1f1b2e;
}

.dark-toggle {
    background: transparent;
    border: 1px solid var(--text);
    border-radius: 40px;
    padding: 6px 16px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text);
    transition: all var(--transition);
}

.dark-toggle:hover {
    background: var(--accent);
    color: #1f1b2e;
    border-color: var(--accent);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text);
    cursor: pointer;
    padding: 4px;
    transition: transform var(--transition);
}

.mobile-menu-btn:hover {
    transform: scale(1.1);
}

@media (max-width: 860px) {
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        background: var(--glass);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-radius: var(--radius);
        padding: 20px;
        margin-top: 12px;
        gap: 8px;
        animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-links.open {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links a {
        padding: 10px 16px;
        border-radius: var(--radius-sm);
    }
}

/* 通用区块 */
section {
    padding: 90px 0;
    position: relative;
}

/* Banner / Hero 轮播 */
.banner {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--banner-gradient);
    border-radius: 0 0 60px 60px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-conic-gradient(rgba(245, 197, 66, 0.03) 0% 25%, transparent 25% 50%) 0 0 / 60px 60px;
    pointer-events: none;
}

.banner-content {
    position: relative;
    z-index: 2;
    padding: 40px 20px;
}

.banner h1 {
    font-size: clamp(2.8rem, 8vw, 5.5rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.1;
    text-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    animation: fadeInUp 0.8s ease;
}

.banner h1 span {
    color: var(--accent);
    text-shadow: 0 0 20px rgba(245, 197, 66, 0.3);
}

.banner p {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: rgba(255, 255, 255, 0.8);
    margin: 30px 0;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.btn-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.btn {
    background: var(--accent);
    color: #1f1b2e;
    border: none;
    padding: 16px 40px;
    border-radius: 60px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 8px 20px rgba(245, 197, 66, 0.3);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform var(--transition);
}

.btn:hover::before {
    transform: translateX(0);
}

.btn-outline {
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
    box-shadow: none;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(245, 197, 66, 0.4);
}

.btn:active {
    transform: translateY(-1px);
}

/* 毛玻璃卡片 */
.glass-card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.glass-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 30%, rgba(245, 197, 66, 0.05), transparent 60%);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition);
}

.glass-card:hover::after {
    opacity: 1;
}

.glass-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(245, 197, 66, 0.3);
}

/* 网格布局 */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
}

@media (max-width: 700px) {
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* 标题与文本 */
.section-title {
    font-size: clamp(2rem, 5vw, 2.6rem);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    border-radius: 4px;
    margin-top: 12px;
}

.text-center .section-title::after {
    margin-left: auto;
    margin-right: auto;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    opacity: 0.8;
    margin-bottom: 50px;
}

.accent {
    color: var(--accent);
}

.primary {
    color: var(--primary);
}

.text-center {
    text-align: center;
}

/* SVG 图标装饰 */
.svg-icon {
    width: 48px;
    height: 48px;
    display: block;
    margin-bottom: 16px;
    fill: var(--accent);
    transition: transform var(--transition);
}

.glass-card:hover .svg-icon {
    transform: scale(1.1) rotate(-5deg);
}

/* 统计数字 */
.stat-number {
    font-size: clamp(2.5rem, 6vw, 3rem);
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    transition: all var(--transition);
}

.stat-number[data-target] {
    display: inline-block;
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    cursor: pointer;
    transition: background var(--transition);
    border-radius: 8px;
}

.faq-item:hover {
    background: rgba(245, 197, 66, 0.03);
}

.faq-question {
    font-weight: 600;
    font-size: clamp(1rem, 2vw, 1.2rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question span {
    transition: transform var(--transition);
    font-size: 0.8em;
}

.faq-item.open .faq-question span {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin 0.3s ease;
    opacity: 0.8;
    line-height: 1.6;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    margin-top: 16px;
}

/* 页脚 */
.footer {
    background: #0f0b1a;
    color: #b9b0d0;
    padding: 60px 0 30px;
    border-radius: 60px 60px 0 0;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.footer a {
    color: #c9bdf0;
    text-decoration: none;
    transition: color var(--transition);
}

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

.footer h4 {
    color: #e9e4f0;
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.footer p {
    font-size: 0.95rem;
    line-height: 1.8;
}

/* 返回顶部按钮 */
.scroll-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background: var(--accent);
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    z-index: 99;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    color: #1f1b2e;
}

.scroll-top.show {
    display: flex;
    animation: fadeInUp 0.3s ease;
}

.scroll-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 30px rgba(245, 197, 66, 0.4);
}

.scroll-top:active {
    transform: translateY(-1px) scale(0.98);
}

/* 面包屑 */
.breadcrumb {
    padding: 20px 0 0;
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 搜索框 */
.search-box {
    display: flex;
    max-width: 400px;
    margin: 40px auto 0;
    background: var(--glass);
    border-radius: 60px;
    padding: 6px 6px 6px 20px;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color var(--transition);
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(245, 197, 66, 0.1);
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    padding: 12px 0;
    outline: none;
    font-size: 0.95rem;
}

.search-box input::placeholder {
    color: var(--text);
    opacity: 0.5;
}

.search-box button {
    background: var(--accent);
    border: none;
    border-radius: 40px;
    padding: 12px 28px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    color: #1f1b2e;
}

.search-box button:hover {
    background: var(--accent2);
    transform: scale(1.02);
}

/* 图片懒加载 */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.5s ease;
}

img.lazy-loaded {
    opacity: 1;
}

/* 轮播 */
.carousel {
    overflow: hidden;
    position: relative;
}

.carousel-inner {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-item {
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: none;
    font-size: 2rem;
    padding: 8px 16px;
    border-radius: 40px;
    cursor: pointer;
    z-index: 5;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.carousel-btn:hover {
    background: rgba(245, 197, 66, 0.6);
    color: #1f1b2e;
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev {
    left: 20px;
}

.carousel-btn.next {
    right: 20px;
}

@media (max-width: 600px) {
    .carousel-btn {
        font-size: 1.5rem;
        padding: 6px 12px;
    }

    .carousel-btn.prev {
        left: 10px;
    }

    .carousel-btn.next {
        right: 10px;
    }
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 为各区块添加滚动可见性动画 */
section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 头部特殊处理 */
header, .banner, .footer {
    opacity: 1;
    transform: none;
}

/* 卡片内标题微调 */
.glass-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--accent);
}

.glass-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.glass-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    opacity: 0.85;
}

/* 团队头像圆形占位 */
.glass-card svg[viewBox="0 0 100 100"] {
    display: block;
    margin-bottom: 16px;
    transition: transform var(--transition);
}

.glass-card:hover svg[viewBox="0 0 100 100"] {
    transform: scale(1.05);
}

/* 案例与新闻卡片 */
article.glass-card h4 {
    color: var(--accent);
    margin-bottom: 8px;
}

/* 友情链接与站点地图 */
.grid-4 span, .grid-4 div {
    padding: 12px;
    text-align: center;
    border-radius: var(--radius-sm);
    background: var(--glass);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: all var(--transition);
    cursor: default;
}

.grid-4 span:hover, .grid-4 div:hover {
    background: rgba(245, 197, 66, 0.1);
    transform: translateY(-2px);
}

/* 页脚网格内链接样式 */
.footer .grid-4 div {
    background: transparent;
    padding: 0;
    text-align: left;
    cursor: default;
}

.footer .grid-4 div:hover {
    background: transparent;
    transform: none;
}

/* 移动端适配增强 */
@media (max-width: 860px) {
    section {
        padding: 60px 0;
    }

    .glass-card {
        padding: 28px;
    }

    .banner {
        min-height: 60vh;
        border-radius: 0 0 40px 40px;
    }

    .footer {
        border-radius: 40px 40px 0 0;
        padding: 40px 0 20px;
    }

    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .glass-card {
        padding: 20px;
        border-radius: 20px;
    }

    .btn {
        padding: 14px 28px;
        font-size: 0.9rem;
    }

    .banner h1 {
        font-size: clamp(2rem, 10vw, 2.8rem);
    }
}

/* 暗色模式下的微调 */
body.dark .glass-card {
    border-color: rgba(255, 255, 255, 0.08);
}

body.dark .search-box {
    border-color: rgba(255, 255, 255, 0.1);
}

body.dark .faq-item {
    border-color: rgba(255, 255, 255, 0.05);
}

/* 打印样式 */
@media print {
    header, .scroll-top, .carousel-btn, .mobile-menu-btn, .dark-toggle {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .glass-card {
        background: #f5f5f5;
        backdrop-filter: none;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}