/* ============ 重置 & 全局 ============ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f1f5f9;
    --white: #ffffff;
    --shadow: 0 4px 24px rgba(0,0,0,.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,.12);
    --radius: 12px;
    --transition: .3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,.35);
}

.btn-full {
    width: 100%;
    text-align: center;
}

/* ============ Header ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,.06);
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark);
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--white);
    border-radius: 8px;
    font-weight: 800;
    font-size: 1.1rem;
}

.nav ul {
    display: flex;
    gap: 8px;
}

.nav a {
    display: block;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: .9rem;
    color: var(--gray-700);
    font-weight: 500;
    transition: all var(--transition);
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
    background: rgba(37,99,235,.06);
}

.header-phone {
    font-weight: 600;
    color: var(--primary);
    font-size: .95rem;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition);
}

/* 手机导航 */
.mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    padding: 16px 0;
}

.mobile-nav.open {
    display: block;
    animation: slideDown .3s ease;
}

.mobile-nav a {
    display: block;
    padding: 12px 24px;
    font-size: 1rem;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
}

.mobile-nav a:hover {
    color: var(--primary);
    background: rgba(37,99,235,.04);
}

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

/* ============ Hero ============ */
.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Banner 轮播区：紧贴导航 */
.hero-banner {
    position: relative;
    width: 100%;
    /* 顶部预留导航高度，避免图片被固定导航遮挡 */
    padding-top: 72px;
    /* banner 宽高比，数值越大越矮，越小越高 */
    aspect-ratio: 4 / 1.3;
    overflow: hidden;
    background: #ffffff;
}

.banner-slides {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    
}

.banner-slide {
    position: absolute;
    inset: 0;
    /* 铺满整个 banner 且保持图片比例，不变形 */
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity .8s ease;
}

.banner-slide.active {
    opacity: 1;
}

/* 底部渐变遮罩：保证指示点在任意图片上都清晰可见 */
.hero-banner::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 64px;
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.18) 100%);
    pointer-events: none;
    z-index: 2;
}

/* 左右箭头 */
.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%) scale(.9);
    z-index: 3;
    background: rgba(255,255,255,.55);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(37,99,235,.15);
    color: var(--primary);
    font-size: 1.6rem;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    box-shadow: var(--shadow);
}

.hero-banner:hover .banner-arrow {
    opacity: 1;
    transform: translateY(-50%) scale(1);
}

.banner-arrow:hover {
    background: var(--white);
    color: var(--primary-dark);
    box-shadow: var(--shadow-lg);
}

.banner-arrow:active {
    transform: translateY(-50%) scale(.92);
}

.banner-arrow.prev {
    left: 24px;
}

.banner-arrow.next {
    right: 24px;
}

/* 轮播指示点：叠加在图片底部 */
.banner-dots {
    position: absolute;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    z-index: 4;
}

.dot {
    position: relative;
    width: 10px;
    height: 10px;
    border-radius: 50px;
    background: rgba(255,255,255,.6);
    box-shadow: 0 1px 4px rgba(0,0,0,.25);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
}

/* 扩大点击热区，提升移动端可点性 */
.dot::before {
    content: "";
    position: absolute;
    inset: -8px;
}

.dot.active {
    /* 激活项拉伸成胶囊，状态更明确 */
    width: 26px;
    background: var(--white);
    box-shadow: 0 1px 6px rgba(0,0,0,.35);
}

.dot:hover {
    background: var(--white);
    transform: scale(1.15);
}

/* Banner 下方文案区 */
.hero-content {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    text-align: center;
    padding: 78px 0;
}

.hero-content h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.hero-sub {
    font-size: 1.35rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.hero-desc {
    max-width: 860px;
    margin: 0 auto;
    font-size: 0.95rem;
    line-height: 1.9;
    color: rgba(255,255,255,.9);
}


/* ============ Section 通用 ============ */
.section {
    padding: 100px 0;
}

.section:nth-child(even) {
    background: var(--gray-100);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
}

.section-en {
    font-size: .85rem;
    color: var(--gray-500);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--primary);
    margin: 0 auto;
    border-radius: 2px;
}

/* ============ 动画 ============ */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all .6s cubic-bezier(.22,.61,.36,1);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============ 优势 ============ */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.advantage-item {
    text-align: center;
    padding: 40px 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.advantage-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(59,130,246,.05));
    color: var(--primary);
}

.advantage-item h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.advantage-item p {
    font-size: .9rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ============ 关于 ============ */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text p {
    font-size: 1rem;
    color: var(--gray-700);
    margin-bottom: 12px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.stat-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.stat-number::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-light);
}

.stat-label {
    font-size: .9rem;
    color: var(--gray-500);
    margin-top: 4px;
}

/* ============ 产品与服务 ============ */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transform: scaleX(0);
    transition: transform var(--transition);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all var(--transition);
}

.product-card:hover .product-icon {
    transform: scale(1.1);
}

.product-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.product-card p {
    font-size: .9rem;
    color: var(--gray-500);
    margin-bottom: 20px;
}

.product-link {
    font-size: .9rem;
    color: var(--primary);
    font-weight: 600;
    transition: all var(--transition);
}

.product-link:hover {
    color: var(--primary-dark);
    letter-spacing: 1px;
}

/* ============ 合作客户 ============ */
.customers-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.customer-logo {
    position: relative;
    aspect-ratio: 1 / 1;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}

.customer-logo:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

/* ============ 合作媒体 ============ */
.media-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* 品牌色块：每块为一个媒体的纯色 Logo 卡片 */
.media-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 120px;
    padding: 24px 16px;
    border-radius: 6px;
    color: var(--white);
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.media-logo:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.media-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.media-sub {
    font-size: .75rem;
    opacity: .85;
    letter-spacing: .5px;
}

/* 各媒体品牌色 */
.media-sohu    { background: #f5c800; color: #333; }
.media-tencent { background: #8a3a3f; }
.media-360     { background: #222; }
.media-google  { background: #2196f3; }
.media-sm      { background: #f07d1a; }
.media-baidu   { background: #2b7ce9; }
.media-weibo   { background: #9c2b25; }
.media-sogou   { background: #f0503c; }

/* ============ 联系我们 ============ */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info p {
    font-size: 1rem;
    color: var(--gray-700);
    margin-bottom: 12px;
    line-height: 1.8;
}

.contact-details {
    margin-top: 32px;
}

.contact-item {
    display: flex;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: .95rem;
}

.contact-label {
    min-width: 110px;
    font-weight: 600;
    color: var(--gray-700);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    font-size: .95rem;
    color: var(--gray-700);
    background: var(--white);
    transition: all var(--transition);
    outline: none;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ============ Footer ============ */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,.7);
    padding: 64px 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer .logo-icon {
    background: var(--primary);
}

.footer .logo-text {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
}

.footer-left p {
    font-size: .9rem;
    line-height: 1.6;
}

.footer h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-quick ul li {
    margin-bottom: 10px;
}

.footer-quick a {
    font-size: .9rem;
    transition: all var(--transition);
}

.footer-quick a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-contact p {
    font-size: .9rem;
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: .8rem;
    color: rgba(255,255,255,.4);
}

/* ============ 回到顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(37,99,235,.3);
    z-index: 998;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .customers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .media-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav, .header-phone {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

    .hero-sub {
        font-size: 1.1rem;
    }

    .hero-content {
        padding: 32px 24px 40px;
    }

    /* 移动端：加高 banner，完整显示图片不拉伸 */
    .hero-banner {
        aspect-ratio: auto;
    }

    .banner-slides {
        position: relative;
        top: 0;
        aspect-ratio: 4 / 1.6;
    }

    .banner-slide {
        background-size: contain;
        background-position: center center;
    }

    .banner-arrow {
        opacity: 1;
        transform: translateY(-50%) scale(1);
    }

    .section {
        padding: 64px 0;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .advantage-item {
        padding: 28px 20px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

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

    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 28px 20px;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .back-to-top {
        bottom: 24px;
        right: 24px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.3rem;
    }

    .hero-desc {
        font-size: .85rem;
    }

    .banner-arrow {
        width: 36px;
        height: 36px;
        font-size: 1.2rem;
    }

    .banner-arrow.prev {
        left: 12px;
    }

    .banner-arrow.next {
        right: 12px;
    }

    .customers-grid,
    .media-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

/* ============ 详情页内容 ============ */
.detail-section {
    padding: 80px 0;
}

.detail-section.alt {
    background: var(--gray-100);
}

.detail-content {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: 100%;
}

.detail-content img {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: contain;
    min-height: 200px;
}

.detail-desc {
    font-size: 1.05rem;
    color: var(--gray-700);
    line-height: 1.8;
    text-align: center;
    padding: 24px 16px;
    margin: 0;
}

.detail-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 16px 0 32px;
    max-width: 900px;
    margin: 0 auto;
}

.detail-info-item {
    background: var(--gray-100);
    border-radius: 12px;
    padding: 28px 24px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.detail-info-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.detail-info-item h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.detail-info-item .info-icon {
    font-size: 1.3rem;
}

.detail-info-item p {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin: 0;
}

@media (max-width: 768px) {
    .detail-info-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 12px 0 24px;
    }
}

/* 功能特性区块 */
.detail-feature-block {
    max-width: 860px;
    margin: 0 auto;
    padding: 32px 36px;

    border-radius: 14px;
    border: 1px solid var(--gray-200);

}

.detail-feature-title {
    margin: 0 0 18px;
    display: flex;
    align-items: center;
}

.feature-badge {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), #e74c3c);
    padding: 6px 24px;
    border-radius: 6px;
    letter-spacing: 2px;
    box-shadow: 0 3px 10px rgba(231, 76, 60, 0.25);
}

.detail-feature-desc {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.9;
    margin: 0 0 10px;
}

.detail-feature-desc.highlight {
    color: var(--primary);
    font-weight: 600;
    padding-left: 12px;
    border-left: 3px solid var(--primary);
}

.detail-feature-subtitle {
    font-size: 1.05rem;
    color: var(--gray-800);
    font-weight: 600;
    margin: 20px 0 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--gray-200);
    display: inline-block;
}

.detail-feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.detail-feature-list li {
    position: relative;
    padding-left: 22px;
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.8;
}

.detail-feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
}

@media (max-width: 768px) {
    .detail-feature-block {
        padding: 24px 20px;
    }

    .feature-badge {
        font-size: 1.1rem;
        padding: 5px 18px;
    }
}

.detail-text-block {
    max-width: 800px;
    margin: 0 auto 48px;
    text-align: center;
}

.detail-text-block p {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* ============ 优势卡片 ============ */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.advantage-num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    opacity: .3;
    margin-bottom: 12px;
}

.advantage-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: .9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ============ 功能列表 ============ */
.feature-list {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.feature-item p {
    font-size: .85rem;
    color: var(--gray-500);
}

/* ============ 攻略步骤 ============ */
.strategy-steps {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.strategy-step {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.strategy-step:hover {
    transform: translateX(8px);
}

.step-num {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.step-content p {
    font-size: .9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ============ CTA区域 ============ */
.detail-cta {
    padding: 80px 0;
    background: var(--gray-100);
}

.cta-box {
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 20px;
    padding: 64px 32px;
    box-shadow: var(--shadow-lg);
}

.cta-box h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-box p {
    font-size: 1rem;
    color: rgba(255, 255, 255, .85);
    margin-bottom: 32px;
}

.cta-box .btn-primary {
    background: var(--white);
    color: var(--primary);
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    display: inline-block;
    transition: transform var(--transition), box-shadow var(--transition);
}

.cta-box .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
}

/* ============ 详情页响应式 ============ */
@media (max-width: 992px) {
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .detail-hero {
        padding: 120px 0 60px;
    }

    .detail-hero h1 {
        font-size: 1.8rem;
    }

    .detail-section {
        padding: 60px 0;
    }

    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    .strategy-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .cta-box {
        padding: 48px 24px;
    }

    .cta-box h2 {
        font-size: 1.4rem;
    }
    /* CSS - 带过渡动画 + 响应式 */
    .modal-overlay {
        position: fixed; inset: 0;
        background: rgba(0,0,0,0.4);
        display: flex; align-items: center; justify-content: center;
        z-index: 9999;
        opacity: 0; transition: opacity 0.2s ease;
    }
    /* ... 现有样式 ... */

    /* 添加logo图片优化样式 */
    .logo-img {
        border-radius: 50%;
        object-fit: cover;
        border: 2px solid #fff;
        box-shadow: 0 2px 8px rgba(0,0,0,0.15);
        transition: all 0.3s ease;
    }

    .logo-img:hover {
        transform: scale(1.1);
        box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    }
}