/* ====== 星海之境 · 全局样式 ====== */
:root {
    --deep-ocean: #020b14;
    --ocean-mid: #0a1f2e;
    --ocean-surface: #143d5c;
    --starlight: #e8f4ff;
    --bioluminescent: #00f0ff;
    --bioluminescent-soft: rgba(0, 240, 255, 0.15);
    --glass-bg: rgba(2, 11, 20, 0.55);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-strong: rgba(255, 255, 255, 0.15);
    --text-primary: #e8f4ff;
    --text-secondary: rgba(232, 244, 255, 0.65);
    --accent-glow: 0 0 30px rgba(0, 240, 255, 0.2);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Serif SC', 'Noto Sans SC', serif;
    background: var(--deep-ocean);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    line-height: 1.8;
}

/* ====== Canvas 星空背景 ====== */
#universe {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ====== 海洋渐变层 ====== */
.ocean-gradient {
    position: fixed;
    bottom: 0; left: 0;
    width: 100%; height: 60%;
    background: linear-gradient(to top, rgba(10, 31, 46, 0.9) 0%, transparent 100%);
    z-index: 1;
    pointer-events: none;
}

/* ====== 水波纹动画 ====== */
.water-ripple {
    position: fixed;
    bottom: 0; left: 0;
    width: 100%; height: 200px;
    background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.03) 0%, transparent 70%);
    animation: ripple 8s ease-in-out infinite;
    z-index: 1;
    pointer-events: none;
}

@keyframes ripple {
    0%, 100% { transform: scaleX(1) translateY(0); opacity: 0.5; }
    50% { transform: scaleX(1.2) translateY(-10px); opacity: 0.8; }
}

/* ====== 内容层 ====== */
.content {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ====== 导航 ====== */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background: rgba(2, 11, 20, 0.8);
    backdrop-filter: blur(20px);
    z-index: 100;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-family: 'Cinzel', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bioluminescent);
    text-decoration: none;
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s;
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--bioluminescent);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--bioluminescent);
    transition: width 0.3s;
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

/* ====== 面包屑 ====== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 0 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover { color: var(--bioluminescent); }

.breadcrumb .sep { opacity: 0.4; }

.breadcrumb .current { color: var(--bioluminescent); }

/* ====== 页面顶部间距 ====== */
.page-top-spacer { height: 2rem; }

/* ====== 页面标题区 ====== */
.page-hero {
    text-align: center;
    padding: 3rem 0 2rem;
}

.page-hero-label {
    display: inline-block;
    font-family: 'Cinzel', serif;
    font-size: 0.8rem;
    letter-spacing: 3px;
    color: var(--bioluminescent);
    opacity: 0.7;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.page-hero-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--bioluminescent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-hero-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ====== 页面主体 ====== */
.page-body {
    padding: 2rem 0 4rem;
}

/* ====== 玻璃态容器 ====== */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(20px);
    margin-bottom: 2rem;
}

/* ====== 工具容器 ====== */
.tool-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem;
    backdrop-filter: blur(20px);
}

/* ====== 首页英雄区 ====== */
.hero-section {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 0;
}

.hero-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--bioluminescent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-cta {
    display: inline-flex;
    gap: 1rem;
    animation: fadeInUp 1s ease 0.4s both;
}

.btn-glow {
    padding: 14px 40px;
    border: 1px solid rgba(0, 240, 255, 0.4);
    border-radius: 50px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(0, 200, 255, 0.05));
    color: var(--bioluminescent);
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.4s;
    backdrop-filter: blur(10px);
}

.btn-glow:hover {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.3), rgba(0, 200, 255, 0.15));
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
    transform: translateY(-2px);
}

.btn-outline {
    padding: 14px 40px;
    border: 1px solid var(--glass-border-strong);
    border-radius: 50px;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.4s;
}

.btn-outline:hover {
    border-color: var(--bioluminescent);
    color: var(--bioluminescent);
    background: rgba(0, 240, 255, 0.05);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ====== 特性卡片 ====== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 4rem 0;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    transition: all 0.4s;
}

.feature-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: var(--accent-glow);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====== 文章列表 ====== */
.articles-section {
    padding: 4rem 0;
}

.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--bioluminescent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2.5rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.article-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(20px);
    transition: all 0.4s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.article-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: var(--accent-glow);
    transform: translateY(-4px);
}

.article-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--glass-border);
}

.article-card-body {
    padding: 1.5rem;
}

.article-card-tag {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--bioluminescent);
    background: rgba(0, 240, 255, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 0.75rem;
}

.article-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.article-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ====== 时间线（日记样式） ====== */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--bioluminescent), transparent);
    opacity: 0.3;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    background: var(--bioluminescent);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

.timeline-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(20px);
    max-width: 420px;
    margin: 0 2rem;
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--bioluminescent);
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ====== 关于区域 ====== */
.about-section {
    padding: 4rem 0;
}

.about-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    backdrop-filter: blur(20px);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.05rem;
    line-height: 2.2;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-email {
    display: inline-block;
    color: var(--bioluminescent);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 8px 24px;
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 50px;
    transition: all 0.3s;
}

.about-email:hover {
    background: rgba(0, 240, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

/* ====== 页脚 ====== */
footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--glass-border);
    margin-top: 2rem;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.6;
    margin-bottom: 0.5rem;
}

/* ====== 文章正文样式 ====== */
.post-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    backdrop-filter: blur(20px);
    line-height: 2;
    color: var(--text-secondary);
}

.post-content h2 {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.post-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--bioluminescent);
    margin: 2rem 0 0.75rem;
}

.post-content p {
    margin-bottom: 1.25rem;
    text-align: justify;
}

.post-content img {
    max-width: 100%;
    border-radius: 16px;
    margin: 1.5rem 0;
    border: 1px solid var(--glass-border);
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

.post-content th, .post-content td {
    border: 1px solid var(--glass-border-strong);
    padding: 10px 12px;
    text-align: left;
}

.post-content th {
    background: rgba(0, 240, 255, 0.08);
    color: var(--bioluminescent);
    font-weight: 600;
}

.post-content tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.post-content .highlight-box {
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.1);
    border-radius: 16px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.post-content .formula {
    font-family: 'Courier New', monospace;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
}

/* ====== 响应式 ====== */
@media (max-width: 768px) {
    .hero-title { font-size: 2.2rem; }
    .page-hero-title { font-size: 1.6rem; }
    .nav-links { gap: 1.2rem; }
    .timeline::before { left: 20px; }
    .timeline-item, .timeline-item:nth-child(even) {
        justify-content: flex-start;
        padding-left: 50px;
        padding-right: 0;
    }
    .timeline-dot { left: 20px; }
    .timeline-content { margin: 0; max-width: 100%; }
    .glass-card, .tool-container, .post-content { padding: 1.5rem; }
    .post-content { padding: 1.5rem; }
    .post-content table { font-size: 0.8rem; }
    .post-content th, .post-content td { padding: 6px 8px; }
}

@media (max-width: 480px) {
    .content { padding: 0 1rem; }
    .hero-title { font-size: 1.8rem; }
    .hero-cta { flex-direction: column; }
    .features-grid, .articles-grid { grid-template-columns: 1fr; }
}