/* ===== 全局样式 ===== */
:root {
    --primary: #1a1a2e;
    --accent: #e94560;
    --accent-light: #ff6b81;
    --bg: #f8f9fc;
    --bg-dark: #0f0f23;
    --text: #2d2d44;
    --text-light: #6b7280;
    --text-white: #f0f0f5;
    --card-bg: #ffffff;
    --border: #e5e7eb;
    --cat-body: #10b981;
    --cat-mind: #6366f1;
    --cat-material: #f59e0b;
    --cat-spirit: #ec4899;
    --cat-ai: #3b82f6;
    --cat-classic: #8b5cf6;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
    --radius: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

/* ===== 导航 ===== */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
    text-decoration: none;
}

.logo-icon {
    color: var(--accent);
    font-size: 20px;
}

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background: rgba(233,69,96,0.08);
    color: var(--accent);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== 英雄区域 ===== */
.hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #16213e 50%, #1a1a2e 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(233,69,96,0.15) 0%, transparent 60%),
                radial-gradient(circle at 70% 30%, rgba(59,130,246,0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 100px 24px 60px;
    max-width: 800px;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-white);
    letter-spacing: 2px;
    margin-bottom: 12px;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--accent-light);
    font-weight: 600;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-desc {
    font-size: 16px;
    color: rgba(240,240,245,0.7);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-top: 40px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

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

.stat-num {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-light);
}

.stat-label {
    font-size: 13px;
    color: rgba(240,240,245,0.5);
}

/* ===== 分类卡片 ===== */
.category-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
}

.section-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 40px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.category-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 28px;
    text-decoration: none;
    color: var(--text);
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.category-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-count {
    font-size: 12px;
    color: var(--text-light);
    align-self: flex-end;
}

.cat-body:hover { border-color: var(--cat-body); }
.cat-mind:hover { border-color: var(--cat-mind); }
.cat-material:hover { border-color: var(--cat-material); }
.cat-spirit:hover { border-color: var(--cat-spirit); }
.cat-ai:hover { border-color: var(--cat-ai); }
.cat-classic:hover { border-color: var(--cat-classic); }

/* ===== 文章列表 ===== */
.latest-articles {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
}

.article-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.article-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text);
    display: block;
}

.article-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.article-item .article-cat {
    display: inline-block;
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 6px;
    font-weight: 600;
    margin-bottom: 8px;
}

.cat-tag-body { background: rgba(16,185,129,0.1); color: var(--cat-body); }
.cat-tag-mind { background: rgba(99,102,241,0.1); color: var(--cat-mind); }
.cat-tag-material { background: rgba(245,158,11,0.1); color: var(--cat-material); }
.cat-tag-spirit { background: rgba(236,72,153,0.1); color: var(--cat-spirit); }
.cat-tag-ai { background: rgba(59,130,246,0.1); color: var(--cat-ai); }
.cat-tag-classic { background: rgba(139,92,246,0.1); color: var(--cat-classic); }

.article-item .article-title {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}

.article-item .article-excerpt {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 12px;
}

.article-item .article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-light);
}

.view-all {
    display: block;
    text-align: center;
    margin-top: 30px;
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    font-size: 15px;
}

/* ===== 今日洞察 ===== */
.daily-insight {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 60px;
}

.insight-card {
    background: linear-gradient(135deg, var(--primary) 0%, #16213e 100%);
    border-radius: var(--radius);
    padding: 40px;
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.insight-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 80%, rgba(233,69,96,0.2) 0%, transparent 50%);
}

.insight-quote {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.6;
    margin-bottom: 16px;
    position: relative;
}

.insight-quote::before {
    content: '"';
    font-size: 48px;
    color: var(--accent-light);
    position: absolute;
    left: -20px;
    top: -10px;
}

.insight-source {
    font-size: 14px;
    color: rgba(240,240,245,0.6);
}

/* ===== 理论根基 ===== */
.theory-base {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
    background: var(--bg);
}

.theory-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.theory-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
}

.theory-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.theory-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 文章详情 ===== */
.article-detail {
    max-width: 800px;
    margin: 80px auto 40px;
    padding: 40px 24px;
}

.article-detail .detail-cat {
    display: inline-block;
    font-size: 13px;
    padding: 4px 12px;
    border-radius: 6px;
    font-weight: 600;
    margin-bottom: 16px;
}

.article-detail .detail-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.3;
    margin-bottom: 16px;
}

.article-detail .detail-meta {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.article-detail .detail-body {
    font-size: 16px;
    line-height: 2;
    color: var(--text);
}

.article-detail .detail-body h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 32px 0 16px;
    color: var(--primary);
}

.article-detail .detail-body h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 24px 0 12px;
    color: var(--primary);
}

.article-detail .detail-body p {
    margin-bottom: 16px;
}

.article-detail .detail-body blockquote {
    background: rgba(233,69,96,0.05);
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    margin: 20px 0;
    font-style: italic;
    color: var(--text);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.article-detail .detail-body ul, .article-detail .detail-body ol {
    margin: 16px 0;
    padding-left: 24px;
}

.article-detail .detail-body li {
    margin-bottom: 8px;
}

.article-detail .detail-body strong {
    color: var(--accent);
}

.article-detail .detail-insight {
    background: linear-gradient(135deg, var(--primary), #16213e);
    border-radius: var(--radius);
    padding: 24px;
    margin: 32px 0;
    color: var(--text-white);
}

.article-detail .detail-insight h4 {
    color: var(--accent-light);
    margin-bottom: 8px;
}

.article-detail .detail-tags {
    display: flex;
    gap: 8px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.article-detail .tag {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(99,102,241,0.08);
    color: var(--cat-mind);
}

/* ===== 分类页 ===== */
.category-page {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 24px;
}

.category-header {
    padding: 40px;
    border-radius: var(--radius);
    margin-bottom: 30px;
    text-align: center;
}

.filter-bar {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 24px;
}

.search-input {
    flex: 1;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--accent);
}

.sort-options {
    display: flex;
    gap: 4px;
}

.sort-btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.sort-btn.active, .sort-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
}

.pagination .page-btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.pagination .page-btn.active, .pagination .page-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ===== 相关文章 ===== */
.related-articles {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* ===== 关于页 ===== */
.about-page {
    max-width: 800px;
    margin: 80px auto 0;
    padding: 24px;
}

.about-title {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 40px;
    padding-top: 20px;
}

.about-block {
    margin-bottom: 40px;
}

.about-block h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.about-block p {
    font-size: 16px;
    line-height: 2;
    margin-bottom: 12px;
}

.about-list {
    list-style: none;
    padding: 0;
}

.about-list li {
    padding: 12px 0;
    font-size: 16px;
    line-height: 1.8;
    border-bottom: 1px solid var(--border);
}

.about-list li:last-child {
    border-bottom: none;
}

.dimension-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 20px;
}

.dim-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--border);
}

.dim-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.dim-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.dim-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 页脚 ===== */
.main-footer {
    background: var(--primary);
    color: var(--text-white);
    padding: 40px 24px;
    margin-top: 60px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    font-size: 18px;
    font-weight: 700;
}

.footer-brand .logo-icon {
    color: var(--accent-light);
}

.footer-brand p {
    font-size: 13px;
    color: rgba(240,240,245,0.5);
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: rgba(240,240,245,0.6);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-info {
    text-align: right;
}

.footer-info p {
    font-size: 13px;
    color: rgba(240,240,245,0.5);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}