/* ============================================
   霸天站群SEO - 完整样式表
   专为站群必应、谷歌、百度排名优化
   ============================================ */

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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #7c3aed;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --text: #1f2937;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

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

img { max-width: 100%; height: auto; }

ul, ol { list-style: none; }

/* ============================================
   按钮
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
    border: 2px solid transparent;
    line-height: 1;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    border-color: transparent;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}
.btn-ghost {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: rgba(255,255,255,0.5);
}
.btn-ghost:hover {
    background: #fff;
    color: var(--primary);
}
.btn-lg { padding: 16px 40px; font-size: 17px; }
.btn-sm { padding: 8px 20px; font-size: 13px; }
.btn-block { display: flex; width: 100%; }

/* ============================================
   头部导航
   ============================================ */
.site-header {
    background: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text);
}
.logo img {
    height: 38px;
    margin-right: 12px;
    border-radius: 6px;
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
@media (max-width: 768px) {
    .logo-text { display: none; }
}
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 8px;
}
.main-nav a {
    display: block;
    padding: 10px 18px;
    text-decoration: none;
    color: var(--text-light);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all 0.2s;
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.08);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #5b21b6 50%, #7c3aed 100%);
    color: #fff;
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255,255,255,0.08) 0%, transparent 50%);
}
.hero-content {
    position: relative;
    text-align: center;
}
.hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}
.hero h1 .highlight {
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 19px;
    opacity: 0.9;
    margin-bottom: 36px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}
.hero-actions .btn-primary {
    background: #fff;
    color: var(--primary);
}
.hero-actions .btn-primary:hover {
    background: #f3f4f6;
    color: var(--primary-dark);
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
    padding-top: 48px;
    border-top: 1px solid rgba(255,255,255,0.2);
}
.hero-stats .stat-item { text-align: center; }
.hero-stats .stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}
.hero-stats .stat-label {
    font-size: 14px;
    opacity: 0.85;
}

/* 页面Banner（内页） */
.page-banner {
    background: linear-gradient(135deg, #1e3a8a 0%, #5b21b6 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}
.page-banner h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
}
.page-banner p {
    font-size: 17px;
    opacity: 0.9;
}

/* ============================================
   通用区块
   ============================================ */
.section {
    padding: 80px 0;
}
.section-alt { background: var(--bg-light); }
.section-dark { background: #1f2937; color: #fff; }

.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
}
.section-desc {
    font-size: 17px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   核心服务/优势
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.feature-card {
    background: #fff;
    padding: 36px 30px;
    border-radius: var(--radius-xl);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(37,99,235,0.1) 0%, rgba(124,58,237,0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 20px;
}
.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}
.feature-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

/* ============================================
   服务流程
   ============================================ */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}
.process-step {
    text-align: center;
    position: relative;
}
.step-number {
    width: 60px;
    height: 60px;
    line-height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    border-radius: 50%;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 8px 20px rgba(37,99,235,0.3);
}
.process-step h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}
.process-step p {
    color: var(--text-light);
    font-size: 14px;
}
.step-connector {
    position: absolute;
    top: 30px;
    left: calc(50% + 30px);
    right: calc(-50% + 30px);
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0.3;
}
.process-step:last-child .step-connector { display: none; }

/* ============================================
   文章/资讯列表
   ============================================ */
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.article-card {
    background: #fff;
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}
.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}
.article-thumb {
    height: 200px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
    position: relative;
    overflow: hidden;
}
.article-thumb::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(255,255,255,0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(255,255,255,0.1) 0%, transparent 50%);
}
.article-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.article-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}
.article-meta span { display: flex; align-items: center; gap: 4px; }
.article-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}
.article-card h3 a {
    color: var(--text);
    text-decoration: none;
}
.article-card h3 a:hover {
    color: var(--primary);
}
.article-excerpt {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
}
.article-read-more:hover { gap: 10px; }

/* 文章详情 */
.article-detail {
    max-width: 860px;
    margin: 0 auto;
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-md);
}
.article-detail h1 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}
.article-detail .article-meta {
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
    margin-bottom: 30px;
}
.article-detail .article-content {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text);
}
.article-detail .article-content p { margin-bottom: 20px; }
.article-detail .article-content h2,
.article-detail .article-content h3 { margin: 30px 0 15px; }
.article-detail .article-content ul,
.article-detail .article-content ol { padding-left: 24px; margin-bottom: 20px; }
.article-detail .article-content li { margin-bottom: 8px; }
.article-detail .article-content img { border-radius: var(--radius); margin: 20px 0; }

/* ============================================
   案例/数据展示
   ============================================ */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.case-card {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 36px 30px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}
.case-logo {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
    font-weight: 700;
}
.case-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}
.case-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
}
.case-metric {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}
.case-metric .metric-item { text-align: center; }
.case-metric .metric-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}
.case-metric .metric-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* ============================================
   CTA 区域
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #5b21b6 100%);
    color: #fff;
    padding: 70px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 60%);
}
.cta-section .container { position: relative; }
.cta-section h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}
.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}
.cta-section .btn-primary {
    background: #fff;
    color: var(--primary);
}
.cta-section .btn-primary:hover {
    background: #f3f4f6;
    color: var(--primary-dark);
}

/* ============================================
   关于我们页面
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    align-items: start;
}
.about-text h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
}
.about-text p {
    color: var(--text-light);
    line-height: 2;
    font-size: 16px;
}
.about-sidebar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-xl);
    padding: 36px;
    color: #fff;
}
.about-sidebar h3 {
    font-size: 22px;
    margin-bottom: 20px;
}
.about-sidebar ul {
    list-style: none;
}
.about-sidebar li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    gap: 10px;
}
.about-sidebar li:last-child { border-bottom: none; }
.about-sidebar li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}

/* 时间线 */
.timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.timeline-item {
    text-align: center;
    position: relative;
}
.timeline-year {
    font-size: 42px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}
.timeline-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}
.timeline-item p {
    color: var(--text-light);
    font-size: 14px;
}

/* ============================================
   联系页面
   ============================================ */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 60px;
}
.contact-info-card {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border);
}
.contact-info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.contact-info-card .feature-icon {
    margin: 0 auto 20px;
}
.contact-info-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
}
.contact-info-card p {
    color: var(--text);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}
.contact-info-card .info-note {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 400;
}

.contact-form-wrap {
    max-width: 640px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 48px;
    border-radius: var(--radius-xl);
}
.contact-form-wrap h2 {
    text-align: center;
    font-size: 26px;
    margin-bottom: 32px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}
.form-group label .required {
    color: var(--danger);
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    transition: all 0.2s;
    background: #fff;
    font-family: inherit;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group textarea {
    resize: vertical;
    min-height: 140px;
}
.form-submit {
    margin-top: 28px;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
    background: #111827;
    color: #d1d5db;
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-about h4 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 16px;
}
.footer-about p {
    color: #9ca3af;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 16px;
}
.footer-col h4 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 20px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; }
.footer-col a {
    color: #9ca3af;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }
.footer-contact li {
    color: #9ca3af;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    text-align: center;
    color: #6b7280;
    font-size: 13px;
}
.footer-bottom p { margin-bottom: 6px; }

/* ============================================
   文章列表页
   ============================================ */
.article-list-page {
    padding: 60px 0;
}
.article-list-header {
    margin-bottom: 40px;
}
.article-list-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}
.article-list-header p {
    color: var(--text-light);
    font-size: 16px;
}
.article-list-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.article-list-grid .article-card {
    display: flex;
    flex-direction: row;
}
.article-list-grid .article-thumb {
    width: 200px;
    min-width: 200px;
    height: auto;
}
.article-list-grid .article-body {
    padding: 24px;
}

/* ============================================
   热门/最新文章侧边栏
   ============================================ */
.sidebar {
    max-width: 860px;
    margin: 48px auto 0;
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 36px 40px;
    box-shadow: var(--shadow-md);
}
.sidebar h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar h2::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 2px;
}
.sidebar-list { list-style: none; }
.sidebar-list li {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list .rank {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: var(--bg-gray);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.sidebar-list li:nth-child(1) .rank {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}
.sidebar-list li:nth-child(2) .rank {
    background: linear-gradient(135deg, #9ca3af, #6b7280);
    color: #fff;
}
.sidebar-list li:nth-child(3) .rank {
    background: linear-gradient(135deg, #d97706, #92400e);
    color: #fff;
}
.sidebar-list a {
    color: var(--text);
    text-decoration: none;
    font-size: 15px;
    line-height: 1.5;
}
.sidebar-list a:hover { color: var(--primary); }

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .hero h1 { font-size: 36px; }
    .features-grid,
    .article-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .timeline { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .about-content { grid-template-columns: 1fr; }
    .article-list-grid { grid-template-columns: 1fr; }
    .contact-info-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 16px 0;
        gap: 16px;
    }
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 4px;
    }
    .main-nav a { padding: 8px 14px; font-size: 14px; }
    
    .hero { padding: 60px 0; }
    .hero h1 { font-size: 28px; }
    .hero-subtitle { font-size: 16px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-actions .btn { width: 100%; max-width: 260px; }
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        padding-top: 32px;
    }
    .hero-stats .stat-number { font-size: 28px; }
    
    .section { padding: 60px 0; }
    .section-title { font-size: 24px; }
    
    .features-grid,
    .article-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    .process-steps { grid-template-columns: 1fr; }
    .timeline { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-contact li { font-size: 13px; }
    .contact-info-grid { grid-template-columns: 1fr; }
    
    .article-detail { padding: 24px; }
    .article-detail h1 { font-size: 24px; }
    .article-detail .article-content { font-size: 15px; }
    
    .article-list-grid .article-card {
        flex-direction: column;
    }
    .article-list-grid .article-thumb {
        width: 100%;
        min-width: 0;
        height: 180px;
    }
    
    .cta-section { padding: 50px 0; }
    .cta-section h2 { font-size: 24px; }
    
    .contact-form-wrap { padding: 28px 20px; }
    
    .page-banner { padding: 40px 0; }
    .page-banner h1 { font-size: 28px; }
}

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

.animate-fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-fade-in-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-fade-in-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-fade-in-delay-4 { animation-delay: 0.4s; opacity: 0; }

/* ============================================
   文章导航（上一篇/下一篇）
   ============================================ */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-nav-prev,
.article-nav-next {
    flex: 1;
    padding: 16px 20px;
    background: var(--bg-light);
    border-radius: var(--radius);
    transition: all 0.2s;
}
.article-nav-prev:hover,
.article-nav-next:hover {
    background: rgba(37, 99, 235, 0.08);
}
.article-nav-prev span,
.article-nav-next span {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.article-nav-prev a,
.article-nav-next a {
    color: var(--text);
    font-weight: 500;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
}
.article-nav-prev a:hover,
.article-nav-next a:hover {
    color: var(--primary);
}

/* ============================================
   文章标签
   ============================================ */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 24px 0;
}
.article-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-gray);
    color: var(--text-light);
    border-radius: 4px;
    font-size: 13px;
}

/* ============================================
   分页
   ============================================ */
.pagination-wrap {
    margin-top: 40px;
    text-align: center;
}
.pagination {
    display: inline-flex;
    gap: 8px;
    justify-content: center;
}
.pagination a,
.pagination .page-current {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border-radius: var(--radius);
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
}
.pagination a {
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
}
.pagination a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pagination .page-current {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ============================================
   侧边栏组件
   ============================================ */
.sidebar-widget {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 28px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
}
.sidebar-widget h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-widget h3::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 2px;
}
.sidebar-widget.sidebar-cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    text-align: center;
}
.sidebar-widget.sidebar-cta h3 {
    color: #fff;
    border-color: rgba(255,255,255,0.3);
}
.sidebar-widget.sidebar-cta h3::before {
    display: none;
}
.sidebar-widget.sidebar-cta p {
    margin-bottom: 20px;
    opacity: 0.9;
}
.sidebar-widget.sidebar-cta .btn-primary {
    background: #fff;
    color: var(--primary);
}

/* ============================================
   文章列表页布局
   ============================================ */
.article-list-page {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}
.article-list-main {
    min-width: 0;
}
.article-list-page .sidebar {
    margin-top: 0;
    max-width: none;
    padding: 0;
    box-shadow: none;
    background: transparent;
    border-radius: 0;
}
.article-list-page .sidebar-widget {
    margin-bottom: 20px;
}
.article-list-page .sidebar-list {
    list-style: none;
    padding: 0;
}
.article-list-page .sidebar-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
}
.article-list-page .sidebar-list li:last-child {
    border-bottom: none;
}
.article-list-page .sidebar-list li a {
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-list-page .sidebar-list li a:hover {
    color: var(--primary);
}

/* ============================================
   文章详情页布局
   ============================================ */
.article-detail {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    max-width: none;
    margin: 0;
    background: transparent;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
}
.article-detail .article-main {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-md);
}
.article-detail .article-main h1 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}
.article-detail .article-main .article-meta {
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
    margin-bottom: 30px;
}
.article-detail .article-main .article-content {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text);
}
.article-detail .article-main .article-content p {
    margin-bottom: 20px;
}
.article-detail .article-main .article-content h2,
.article-detail .article-main .article-content h3 {
    margin: 30px 0 15px;
}
.article-detail .article-main .article-content ul,
.article-detail .article-main .article-content ol {
    padding-left: 24px;
    margin-bottom: 20px;
}
.article-detail .article-main .article-content li {
    margin-bottom: 8px;
}
.article-detail .article-main .article-content img {
    border-radius: var(--radius);
    margin: 20px 0;
}
.article-detail .sidebar {
    margin-top: 0;
    max-width: none;
    padding: 0;
    box-shadow: none;
    background: transparent;
    border-radius: 0;
}
.article-detail .sidebar-widget {
    margin-bottom: 20px;
}
.article-detail .sidebar-list {
    list-style: none;
    padding: 0;
}
.article-detail .sidebar-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
}
.article-detail .sidebar-list li:last-child {
    border-bottom: none;
}
.article-detail .sidebar-list li a {
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-detail .sidebar-list li a:hover {
    color: var(--primary);
}

/* ============================================
   FAQ列表
   ============================================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px 28px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}
.faq-item:hover {
    box-shadow: var(--shadow-md);
}
.faq-item h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}
.faq-item p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 15px;
}

/* ============================================
   联系信息卡片（补充样式）
   ============================================ */
.contact-info-card span {
    display: block;
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 8px;
}

/* ============================================
   响应式补充
   ============================================ */
@media (max-width: 1024px) {
    .article-list-page,
    .article-detail {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .article-list-page,
    .article-detail {
        grid-template-columns: 1fr;
    }
    .article-detail .article-main {
        padding: 24px;
    }
    .article-detail .article-main h1 {
        font-size: 24px;
    }
    .article-nav {
        flex-direction: column;
    }
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
}