/* ==========================================
   GEO2026 模板 - 参考七牛云科技风格
   主色：蓝紫 #3370FF / 青绿 #00C596 渐变
   底色：浅灰 #F5F7FA / 深色 #0D1117
   文字：深灰 #1D2129 / 正文 #4E5969 / 辅助 #86909C
   ========================================== */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    /* 主品牌色 - 蓝紫科技风 */
    --primary: #3370FF;
    --primary-dark: #2B5FE0;
    --primary-light: #5B8DFF;
    --primary-lighter: rgba(51, 112, 255, 0.08);
    --primary-bg: #EBF1FF;
    --accent: #00C596;
    --accent-dark: #00AB80;
    --accent-light: #33D4AA;
    --accent-bg: #E6FAF5;
    --gradient: linear-gradient(135deg, #3370FF 0%, #00C596 100%);
    --gradient-dark: linear-gradient(135deg, #2B5FE0 0%, #00AB80 100%);
    --gradient-text: linear-gradient(135deg, #3370FF 0%, #00C596 100%);
    --tag-orange: #FF6B35;
    --tag-purple: #7B61FF;

    /* 页面基底 */
    --bg: #F5F7FA;
    --bg-alt: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-dark: #0D1117;
    --bg-dark-light: #161B22;
    --bg-dark-card: #1C2330;

    /* 文字 */
    --text-h: #1D2129;
    --text-body: #4E5969;
    --text-small: #86909C;
    --text-light: #C9CDD4;
    --text-white: #FFFFFF;
    --text-white-light: rgba(255, 255, 255, 0.75);
    --text-white-muted: rgba(255, 255, 255, 0.5);

    /* 边框 */
    --border: #E5E6EB;
    --border-light: #F2F3F5;
    --border-dark: rgba(255, 255, 255, 0.08);

    /* 阴影 */
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-primary: 0 4px 20px rgba(51, 112, 255, 0.15);
    --shadow-accent: 0 4px 20px rgba(0, 197, 150, 0.15);

    /* 圆角 */
    --r-sm: 6px;
    --r-md: 10px;
    --r-lg: 16px;
    --r-xl: 24px;
    --r-full: 999px;

    /* 字体 */
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

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

/* 渐变文字 */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== 导航栏 - 深色固定 ========== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: 64px;
    background: var(--bg-dark);
    transition: all 0.3s;
}
.navbar.scrolled {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border-dark);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-white);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-logo .logo-badge {
    display: inline-block;
    background: var(--gradient);
    color: var(--text-white);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--r-full);
    letter-spacing: 0.5px;
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: 4px;
    align-items: center;
}
.nav-menu a {
    color: var(--text-white-light);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--r-sm);
    transition: all 0.2s;
}
.nav-menu a:hover, .nav-menu a.active {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.08);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.nav-cta {
    background: var(--gradient);
    color: var(--text-white);
    padding: 8px 20px;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: 0.85rem;
    white-space: nowrap;
    transition: all 0.2s;
}
.nav-cta:hover {
    opacity: 0.9;
    color: var(--text-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary);
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.4rem;
    cursor: pointer;
}

/* ========== Hero Banner - 深色渐变 ========== */
.hero {
    min-height: 600px;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
    padding-top: 64px;
    display: flex;
    align-items: center;
}
.hero::before {
    content: "";
    position: absolute;
    top: -10%; right: -5%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(51, 112, 255, 0.15) 0%, transparent 70%);
    pointer-events: none;
}
.hero::after {
    content: "";
    position: absolute;
    bottom: -15%; left: -5%;
    width: 450px; height: 450px;
    background: radial-gradient(circle, rgba(0, 197, 150, 0.12) 0%, transparent 70%);
    pointer-events: none;
}
.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
    position: relative;
    z-index: 1;
    text-align: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(51, 112, 255, 0.12);
    border: 1px solid rgba(51, 112, 255, 0.25);
    color: var(--primary-light);
    padding: 6px 18px;
    border-radius: var(--r-full);
    font-size: 0.82rem;
    font-weight: 500;
    margin-bottom: 28px;
}
.hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}
.hero h1 .gradient-text {
    display: inline;
}
.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-white-light);
    max-width: 680px;
    margin: 0 auto 36px;
    line-height: 1.8;
}
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.btn-primary {
    background: var(--gradient);
    color: var(--text-white);
    padding: 13px 36px;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-block;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}
.btn-outline {
    background: transparent;
    color: var(--text-white);
    padding: 13px 36px;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-block;
    transition: all 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.25);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--text-white);
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.hero-stat { text-align: center; }
.hero-stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}
.hero-stat-label {
    font-size: 0.82rem;
    color: var(--text-white-muted);
}

/* ========== 通用Section ========== */
section { padding: 72px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-h);
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}
.section-subtitle {
    color: var(--text-small);
    font-size: 1rem;
    max-width: 640px;
    margin: 0 auto;
}

/* ========== 核心优势卡片 ========== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.advantage-card {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}
.advantage-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-light);
}
.advantage-icon {
    width: 56px; height: 56px;
    border-radius: var(--r-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto 20px;
    background: var(--primary-bg);
}
.advantage-card:nth-child(2) .advantage-icon { background: var(--accent-bg); }
.advantage-card:nth-child(3) .advantage-icon { background: #F0EBFF; }
.advantage-card:nth-child(4) .advantage-icon { background: #FFF4E6; }
.advantage-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-h);
    margin-bottom: 10px;
}
.advantage-card p {
    color: var(--text-body);
    font-size: 0.88rem;
    line-height: 1.7;
}

/* ========== 产品/服务卡片 ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.product-card {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-light);
}
.product-card .card-top {
    padding: 24px 24px 0;
}
.product-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--r-full);
    margin-bottom: 12px;
}
.tag-hot { background: #FFEDED; color: #F53F3F; }
.tag-new { background: #E8FFEA; color: #00B42A; }
.tag-rec { background: var(--primary-bg); color: var(--primary); }
.product-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-h);
    margin-bottom: 8px;
}
.product-card .desc {
    color: var(--text-body);
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 16px;
}
.product-features {
    list-style: none;
    padding: 0 24px 16px;
    flex: 1;
}
.product-features li {
    padding: 6px 0;
    color: var(--text-body);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.product-features li::before {
    content: "";
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--accent-bg);
    flex-shrink: 0;
    position: relative;
}
.product-features li::after {
    content: "✓";
    position: absolute;
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
    margin-left: -22px;
    margin-top: 5px;
}
.product-btn {
    display: block;
    margin: 0 24px 24px;
    text-align: center;
    background: var(--primary-lighter);
    color: var(--primary);
    padding: 10px;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: 0.88rem;
    transition: all 0.2s;
}
.product-btn:hover {
    background: var(--gradient);
    color: var(--text-white);
}

/* ========== 培训课程区域 ========== */
.training-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.training-card {
    background: var(--bg-card);
    border-radius: var(--r-md);
    padding: 24px 20px;
    transition: all 0.3s;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}
.training-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}
.training-card .num {
    position: absolute;
    top: 12px; right: 16px;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--border);
    line-height: 1;
}
.training-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-h);
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}
.training-card p {
    font-size: 0.82rem;
    color: var(--text-small);
    line-height: 1.6;
}

/* ========== 城市案例 ========== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.case-card {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}
.case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.case-top {
    padding: 24px;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--accent-bg) 100%);
    border-bottom: 1px solid var(--border-light);
}
.case-top h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-h);
    margin-bottom: 4px;
}
.case-top p { font-size: 0.82rem; color: var(--text-small); }
.case-body { padding: 24px; }
.case-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}
.case-stat {
    text-align: center;
    padding: 12px;
    background: var(--bg);
    border-radius: var(--r-sm);
}
.case-stat-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
}
.case-stat-label {
    font-size: 0.75rem;
    color: var(--text-small);
}
.case-desc {
    color: var(--text-body);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ========== 最新资讯 ========== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card2 {
    background: var(--bg-card);
    border-radius: var(--r-md);
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-light);
}
.news-card2:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
    border-color: var(--primary-light);
}
.news-card2-img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg);
}
.news-card2-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.news-card2:hover .news-card2-img img {
    transform: scale(1.05);
}
.news-card2-body {
    padding: 16px 20px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.news-card2-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 10px;
}
.news-card2-date,
.news-card2-cat {
    font-size: 0.76rem;
    color: var(--text-small);
    display: flex;
    align-items: center;
    gap: 4px;
}
.news-card2-date svg,
.news-card2-cat svg {
    opacity: 0.6;
}
.news-card2-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-h);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card2-title a {
    color: var(--text-h);
    transition: color 0.2s ease;
}
.news-card2-title a:hover {
    color: var(--primary);
}
.news-card2-desc {
    color: var(--text-small);
    font-size: 0.82rem;
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
    flex: 1;
}
.news-card2-btn {
    display: inline-block;
    padding: 7px 24px;
    border: 1.5px solid var(--primary);
    border-radius: var(--r-sm);
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    transition: all 0.25s ease;
    align-self: flex-start;
}
.news-card2-btn:hover {
    background: var(--primary);
    color: #fff;
}
.news-more-btn {
    text-align: center;
    margin-top: 36px;
}
.news-more-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 36px;
    border-radius: var(--r-full);
    background: var(--bg-card);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.92rem;
    border: 1.5px solid var(--primary-light);
    transition: all 0.3s ease;
}
.news-more-link:hover {
    background: var(--gradient);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(51, 112, 255, 0.2);
}
.news-more-link svg {
    transition: transform 0.3s ease;
}
.news-more-link:hover svg {
    transform: translateX(4px);
}

/* ========== FAQ 模块 ========== */
.faq-section { background: var(--bg-alt); }
.faq-container {
    max-width: 840px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--r-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.2s;
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-q {
    padding: 18px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-h);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}
.faq-q::after {
    content: "+";
    font-size: 1.3rem;
    color: var(--primary);
    transition: transform 0.2s;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 24px;
}
.faq-item.open .faq-a {
    max-height: 300px;
    padding-bottom: 18px;
}
.faq-a p {
    color: var(--text-body);
    font-size: 0.88rem;
    line-height: 1.8;
}

/* ========== 联系咨询 - 深色 ========== */
.contact-section {
    background: var(--bg-dark);
    padding: 72px 0;
    position: relative;
    overflow: hidden;
}
.contact-section::before {
    content: "";
    position: absolute;
    top: -20%; right: -10%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(51, 112, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}
.contact-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
.contact-info h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 16px;
}
.contact-info > p {
    color: var(--text-white-light);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
}
.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    color: var(--text-white-light);
    font-size: 0.9rem;
}
.info-item .icon { font-size: 1.2rem; }
.info-item a { color: var(--accent-light); }
.contact-form {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    padding: 32px;
    box-shadow: var(--shadow-lg);
}
.contact-form h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-h);
    margin-bottom: 20px;
    text-align: center;
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    font-size: 0.88rem;
    margin-bottom: 12px;
    font-family: var(--font);
    transition: all 0.2s;
    background: var(--bg);
    color: var(--text-body);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-small); }
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-lighter);
}
.contact-form button {
    width: 100%;
    background: var(--gradient);
    color: var(--text-white);
    padding: 12px;
    border: none;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}
.contact-form button:hover {
    opacity: 0.9;
    box-shadow: var(--shadow-primary);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark-light);
    color: var(--text-white-light);
    padding: 56px 0 0;
}
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 36px;
}
.footer-section h4 {
    color: var(--text-white);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-section p {
    font-size: 0.85rem;
    line-height: 1.7;
    margin-bottom: 8px;
    color: var(--text-white-light);
}
.footer-section ul { list-style: none; }
.footer-section ul li { padding: 4px 0; }
.footer-section ul li a {
    color: var(--text-white-light);
    font-size: 0.85rem;
    transition: color 0.2s;
}
.footer-section ul li a:hover { color: var(--accent-light); }
/* ===== 友情链接 - 简洁白底横排样式 ===== */
.footer-friendlink {
    background: #f5f5f5;
    padding: 10px 24px;
    margin: 0 -24px;
    border-top: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}
.footer-friendlink h4 {
    font-size: 13px;
    font-weight: 600;
    color: #333;
    margin: 0 8px 0 0;
    white-space: nowrap;
    flex-shrink: 0;
}
.footer-friendlink h4::before {
    display: none;
}
.friendlink-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
}
.friendlink-list ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
}
.friendlink-list li {
    list-style: none;
    margin: 0;
    padding: 0;
}
.friendlink-list li:first-child {
    display: none;
}
.friendlink-list .friend-link {
    display: contents;
}
.footer-friendlink a,
.friendlink-list a {
    display: inline;
    padding: 0;
    font-size: 13px;
    color: #555;
    background: none;
    border: none;
    border-radius: 0;
    transition: color 0.2s ease;
    text-decoration: none;
    line-height: 2;
    margin-right: 14px;
}
.footer-friendlink a:hover,
.friendlink-list a:hover {
    color: #3370ff;
    background: none;
    border: none;
    transform: none;
    box-shadow: none;
    text-decoration: underline;
}
.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid var(--border-dark);
    text-align: center;
}
.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-white-muted);
    margin-bottom: 4px;
}
.footer-bottom a { color: var(--text-white-muted); }

/* ========== 悬浮电话 ========== */
.float-phone {
    position: fixed;
    right: 24px; bottom: 32px;
    width: 52px; height: 52px;
    background: var(--gradient);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(51, 112, 255, 0.3);
    z-index: 999;
    transition: all 0.3s;
}
.float-phone:hover {
    transform: scale(1.1);
    color: var(--text-white);
    box-shadow: 0 6px 28px rgba(51, 112, 255, 0.4);
}
.float-tooltip {
    position: absolute;
    right: 64px;
    background: var(--bg-card);
    color: var(--primary);
    padding: 6px 14px;
    border-radius: var(--r-sm);
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    box-shadow: var(--shadow-md);
}
.float-phone:hover .float-tooltip { opacity: 1; }

/* ========== 文章列表页 ========== */
.list-page { padding-top: 64px; min-height: 100vh; background: var(--bg); }
.list-hero {
    background: var(--bg-dark);
    padding: 48px 0 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.list-hero::before {
    content: "";
    position: absolute;
    top: -30%; left: 50%;
    transform: translateX(-50%);
    width: 600px; height: 300px;
    background: radial-gradient(ellipse, rgba(51, 112, 255, 0.12) 0%, transparent 70%);
}
.list-hero h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-white);
    position: relative;
    margin-bottom: 8px;
}
.list-hero p {
    color: var(--text-white-light);
    font-size: 0.92rem;
    position: relative;
}
.breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    font-size: 0.85rem;
}
.breadcrumb a { color: var(--text-small); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--primary); margin: 0 6px; }
.breadcrumb .current { color: var(--primary); font-weight: 600; }

.filter-bar-wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.filter-bar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 14px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
}
.filter-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-h);
    white-space: nowrap;
}
.filter-bar a {
    font-size: 0.84rem;
    color: var(--text-body);
    padding: 4px 14px;
    border-radius: var(--r-full);
    border: 1px solid var(--border);
    transition: all 0.2s;
}
.filter-bar a:hover, .filter-bar a.active {
    background: var(--gradient);
    color: var(--text-white);
    border-color: transparent;
}

.list-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 60px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 28px;
}
.article-list { display: flex; flex-direction: column; gap: 14px; }
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--r-md);
    padding: 22px;
    transition: all 0.3s;
    display: flex;
    gap: 18px;
    box-shadow: var(--shadow-sm);
}
.article-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}
.article-card .thumb {
    flex-shrink: 0;
    width: 160px; height: 110px;
    border-radius: var(--r-sm);
    overflow: hidden;
    background: var(--bg);
}
.article-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-card .content { flex: 1; min-width: 0; }
.article-card h3 {
    font-size: 1.05rem;
    color: var(--text-h);
    margin-bottom: 8px;
    line-height: 1.4;
}
.article-card h3 a { color: var(--text-h); }
.article-card h3 a:hover { color: var(--primary); }
.article-card .desc {
    color: var(--text-body);
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-card .meta {
    display: flex;
    gap: 14px;
    font-size: 0.78rem;
    color: var(--text-small);
}
.article-card .meta .cat-tag {
    background: var(--primary-bg);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: var(--r-full);
    font-weight: 500;
}
.read-more {
    display: inline-block;
    margin-top: 8px;
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 600;
}

/* 分页 */
.pagination-wrap { margin-top: 28px; display: flex; justify-content: center; }
.pagination { list-style: none; display: flex; gap: 6px; }
.page-item a, .page-item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px; height: 36px;
    padding: 0 10px;
    border-radius: var(--r-sm);
    font-size: 0.85rem;
    border: 1px solid var(--border);
    color: var(--text-body);
    background: var(--bg-card);
    transition: all 0.2s;
    text-decoration: none;
}
.page-item a:hover { border-color: var(--primary); color: var(--primary); }
.page-item.active span {
    background: var(--gradient);
    color: var(--text-white);
    border-color: transparent;
    font-weight: 600;
}
.page-item.disabled span { color: var(--text-small); opacity: 0.5; }

/* 侧边栏 */
.sidebar { display: flex; flex-direction: column; gap: 16px; }
.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--r-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}
.sidebar-card h4 {
    color: var(--text-h);
    font-size: 1rem;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
}
.sidebar-contact {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-bg), var(--accent-bg));
    border-color: var(--border);
}
.sidebar-contact .icon { font-size: 1.8rem; margin-bottom: 10px; }
.sidebar-contact p { color: var(--text-body); font-size: 0.85rem; margin-bottom: 12px; }
.sidebar-contact .phone-btn {
    display: block;
    background: var(--gradient);
    color: var(--text-white);
    padding: 11px;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 10px;
}
.sidebar-contact .phone-btn:hover { color: var(--text-white); opacity: 0.9; }
.sidebar-list { list-style: none; }
.sidebar-list li {
    padding: 9px 0;
    border-bottom: 1px solid var(--border-light);
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list li a {
    color: var(--text-body);
    font-size: 0.85rem;
    display: flex;
    gap: 8px;
    align-items: flex-start;
}
.sidebar-list li a:hover { color: var(--primary); }
.sidebar-list li .num {
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
    min-width: 18px;
}

/* ========== 文章详情页 ========== */
.detail-page { padding-top: 64px; min-height: 100vh; background: var(--bg); }
.detail-container { max-width: 860px; margin: 0 auto; padding: 28px 24px 60px; }
.detail-breadcrumb { margin-bottom: 20px; font-size: 0.85rem; }
.detail-breadcrumb a { color: var(--text-small); }
.detail-breadcrumb a:hover { color: var(--primary); }
.detail-breadcrumb span { color: var(--primary); margin: 0 6px; }
.detail-breadcrumb .current { color: var(--primary); font-weight: 600; }

.detail-header {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 32px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--primary);
}
.detail-header h1 {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--text-h);
    margin-bottom: 14px;
    line-height: 1.4;
}
.detail-meta {
    display: flex;
    gap: 18px;
    font-size: 0.82rem;
    color: var(--text-small);
    flex-wrap: wrap;
}
.detail-meta .cat-tag {
    background: var(--primary-bg);
    color: var(--primary);
    padding: 2px 12px;
    border-radius: var(--r-full);
    font-weight: 500;
}

.detail-content {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--r-md);
    padding: 36px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    line-height: 1.9;
    font-size: 0.95rem;
    color: var(--text-body);
}
.detail-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 24px 0 12px;
    color: var(--text-h);
    border-left: 4px solid var(--primary);
    padding-left: 12px;
}
.detail-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 20px 0 10px;
    color: var(--primary);
}
.detail-content p { margin-bottom: 14px; line-height: 1.9; }
.detail-content ul, .detail-content ol { margin: 12px 0 14px 20px; }
.detail-content li { margin-bottom: 6px; line-height: 1.8; }
.detail-content li::marker { color: var(--primary); }
.detail-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-bg);
    padding: 14px 20px;
    margin: 16px 0;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    color: var(--text-body);
}
.detail-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.detail-content table th {
    background: var(--primary-bg);
    color: var(--text-h);
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    border: 1px solid var(--border);
}
.detail-content table td { padding: 10px 14px; border: 1px solid var(--border-light); }
.detail-content img { max-width: 100%; border-radius: var(--r-sm); margin: 12px 0; }
.detail-content a { color: var(--primary); text-decoration: underline; }
.detail-content code {
    background: var(--primary-bg);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--primary);
}

.detail-tags {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--border-light);
}
.tag-label { font-size: 0.85rem; color: var(--text-small); margin-right: 8px; }
.detail-tags a {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: var(--r-full);
    font-size: 0.8rem;
    margin-right: 8px;
    margin-bottom: 8px;
    transition: all 0.2s;
}
.detail-tags a:hover { background: var(--gradient); color: var(--text-white); }

/* 详情页FAQ */
.detail-faq {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 28px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}
.detail-faq h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-h);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
}

/* 上下篇 */
.detail-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 16px;
}
.detail-nav-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--r-sm);
    padding: 14px 18px;
    transition: all 0.2s;
}
.detail-nav-item:hover { border-color: var(--primary-light); background: var(--primary-bg); }
.detail-nav-item .nav-label { font-size: 0.78rem; color: var(--text-small); margin-bottom: 4px; }
.detail-nav-item a { color: var(--primary); font-size: 0.88rem; font-weight: 600; }
.detail-nav-item.next { text-align: right; }

/* 详情页联系 */
.detail-contact {
    background: var(--bg-dark);
    border-radius: var(--r-md);
    padding: 32px;
    text-align: center;
    margin-bottom: 16px;
}
.detail-contact h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-white);
}
.detail-contact p {
    font-size: 0.9rem;
    margin-bottom: 20px;
    color: var(--text-white-light);
}

/* 相关推荐 */
.detail-related {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--r-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
}
.detail-related h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-h);
}
.detail-related-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.related-item {
    padding: 12px 16px;
    border: 1px solid var(--border-light);
    border-radius: var(--r-sm);
    transition: all 0.2s;
}
.related-item:hover { border-color: var(--primary-light); background: var(--primary-bg); }
.related-item a { color: var(--text-body); font-size: 0.88rem; font-weight: 500; display: block; line-height: 1.4; }
.related-item a:hover { color: var(--primary); }
.related-item .date { font-size: 0.76rem; color: var(--text-small); margin-top: 4px; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .footer-content { grid-template-columns: 1fr 1fr; }
    .advantages-grid, .training-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 64px; left: 0; right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 16px;
        gap: 0;
    }
    .nav-menu.active { display: flex; }
    .nav-menu a {
        padding: 12px 16px;
        border-bottom: 1px solid var(--border-dark);
        border-radius: 0;
    }
    .mobile-menu-btn { display: block; }
    .nav-cta { display: none; }

    .hero h1 { font-size: 1.7rem; }
    .hero-subtitle { font-size: 0.92rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }

    .products-grid, .cases-grid { grid-template-columns: 1fr; }
    .advantages-grid, .training-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }

    .contact-container { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; gap: 24px; }

    .list-layout { grid-template-columns: 1fr; }
    .article-card { flex-direction: column; }
    .article-card .thumb { width: 100%; height: 160px; }

    .detail-header h1 { font-size: 1.3rem; }
    .detail-content { padding: 20px; }
    .detail-related-list { grid-template-columns: 1fr; }
    .detail-nav { grid-template-columns: 1fr; }

    section { padding: 48px 0; }
    .section-title { font-size: 1.5rem; }
}