/* ===================================
   CSS 自定义属性 - 配色方案
   =================================== */
:root {
    /* 主色调 - 生态绿系 */
    --color-primary: #2d5a27;      /* 森林绿 */
    --color-primary-light: #4a7c43; /* 草地绿 */
    --color-primary-dark: #1a3817;  /* 深苔藓绿 */

    /* 强调色 - 大地色系 */
    --color-accent: #8c6a4b;       /* 树皮褐 */
    --color-accent-glow: rgba(45, 90, 39, 0.2);

    /* 次要强调色 - 清新色 */
    --color-secondary: #e8f5e9;    /* 浅薄荷 */
    --color-secondary-light: #a5d6a7;

    /* 背景色 - 自然米白系 */
    --color-bg-primary: #fcfbf9;   /* 羊皮纸白 */
    --color-bg-secondary: #f4f1ea; /* 浅灰褐 */
    --color-bg-tertiary: #e9e6de;  /* 暖灰 */

    /* 文字颜色 */
    --color-text-primary: #2c3e30; /* 深灰绿 */
    --color-text-secondary: #56695b; /* 灰橄榄 */
    --color-text-muted: #85968a;

    /* 边框颜色 */
    --color-border: #dcd6cb;
    --color-border-light: #eae4d9;

    /* 字体 */
    --font-display: 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-body: 'Noto Sans SC', sans-serif;

    /* 圆角 - 有机感 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms ease;

    /* 阴影 - 柔和自然 */
    --shadow-sm: 0 2px 4px rgba(44, 62, 48, 0.05);
    --shadow-md: 0 8px 16px rgba(44, 62, 48, 0.08);
    --shadow-lg: 0 16px 32px rgba(44, 62, 48, 0.12);
    --shadow-glow: 0 0 30px rgba(74, 124, 67, 0.15);
}

/* ===================================
   全局样式重置与基础样式
   =================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* ===================================
   背景效果 - 有机自然
   =================================== */
.organic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.organic-shape {
    position: absolute;
    filter: blur(80px);
    opacity: 0.4;
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.organic-shape:nth-child(1) {
    top: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--color-secondary-light);
    animation-delay: 0s;
}

.organic-shape:nth-child(2) {
    bottom: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: var(--color-primary-light);
    animation-delay: -5s;
    opacity: 0.2;
}

.organic-shape:nth-child(3) {
    top: 40%;
    left: 30%;
    width: 300px;
    height: 300px;
    background: var(--color-accent);
    opacity: 0.1;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ===================================
   头部导航
   =================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(252, 251, 249, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.logo-icon {
    width: 50px;
    height: 50px;
    color: var(--color-accent);
    animation: logoRotate 20s linear infinite;
}

@keyframes logoRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: 0.02em;
}

.logo-subtitle {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.main-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-link {
    display: block;
    padding: 0.6rem 1rem;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base), left var(--transition-base);
}

.nav-link:hover {
    color: var(--color-accent);
}

.nav-link:hover::before {
    width: 100%;
    left: 0;
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::before {
    width: 100%;
    left: 0;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
}

/* 搜索按钮 */
.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.search-toggle:hover {
    background: var(--color-secondary);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
    transform: scale(1.05);
}

.search-toggle svg {
    width: 20px;
    height: 20px;
}

/* 搜索模态框 */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 100px;
}

.search-modal.active {
    display: flex;
    animation: searchFadeIn 0.2s ease-out;
}

@keyframes searchFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.search-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(44, 62, 48, 0.6);
    backdrop-filter: blur(4px);
}

.search-container {
    position: relative;
    width: 100%;
    max-width: 700px;
    margin: 0 2rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    animation: searchSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes searchSlideIn {
    from {
        transform: translateY(-20px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.search-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem 1rem;
    border-bottom: 1px solid var(--color-border-light);
}

.search-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-text-primary);
    margin: 0;
}

.search-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-bg-secondary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.search-close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.search-close svg {
    width: 18px;
    height: 18px;
}

.search-input-wrapper {
    position: relative;
    padding: 1rem 2rem;
}

.search-icon {
    position: absolute;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
}

.search-input-wrapper input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    font-family: var(--font-body);
    font-size: 1.1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.search-input-wrapper input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: white;
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.search-input-wrapper input::placeholder {
    color: var(--color-text-muted);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
    padding: 0 2rem 1rem;
}

.search-results::-webkit-scrollbar {
    width: 6px;
}

.search-results::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

.search-results::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.search-results::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

.search-result-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.search-result-item:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-border);
}

.search-result-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    padding-top: 0.2rem;
}

.search-result-content {
    flex: 1;
    min-width: 0;
}

.search-result-type {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 0.5rem;
}

.search-result-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.search-result-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-result-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.search-result-date {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.search-no-results {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--color-text-muted);
}

.search-no-results-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.search-loading {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--color-text-muted);
}

.search-hints {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.shortcut-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 0.5rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* ===================================
   主内容区域
   =================================== */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 80px - 200px); /* header + footer height */
    position: relative;
    z-index: 1;
}

.page-section {
    display: none;
    padding-bottom: 4rem;
    animation: fadeIn 0.5s ease-out;
}

.page-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero Section */
.hero-section {
    padding: 8rem 2rem 6rem;
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    margin-left: 6rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
    border: 1px solid var(--color-secondary-light);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.badge-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(45, 90, 39, 0.4); }
    70% { box-shadow: 0 0 0 6px rgba(45, 90, 39, 0); }
    100% { box-shadow: 0 0 0 0 rgba(45, 90, 39, 0); }
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
    font-family: var(--font-display);
}

.title-line {
    display: block;
}

.title-line.highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* Tech Keywords Visual Composition */
.tech-keywords-card {
    background: transparent;
    border-radius: 0;
    padding: 1rem;
    box-shadow: none;
    border: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    max-width: 450px;
    position: relative;
    overflow: visible;
}

.tech-keywords-card::before {
    display: none;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    width: fit-content;
}

.tech-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 25px rgba(45, 90, 39, 0.15);
    background: white;
    border-color: var(--color-primary-light);
}

/* Staggered layout for organic feel */
.tech-item:nth-child(1) { align-self: flex-start; }
.tech-item:nth-child(2) { align-self: flex-end; margin-top: -0.5rem; }
.tech-item:nth-child(3) { align-self: center; margin-left: 2rem; }
.tech-item:nth-child(4) { align-self: flex-start; margin-left: 1rem; }
.tech-item:nth-child(5) { align-self: flex-end; }

.tech-icon {
    font-size: 1.6rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.tech-text {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 1.05rem;
}

/* Research Preview */
.research-preview {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 4rem auto;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--color-text-primary);
    font-weight: 700;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.preview-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.preview-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

.card-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===================================
   页脚
   =================================== */
.main-footer {
    background: var(--color-primary-dark);
    color: white;
    padding: 4rem 2rem 2rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--color-secondary-light);
}

.footer-desc {
    opacity: 0.8;
}

.footer-links, .footer-contact {
    list-style: none;
}

.footer-links li, .footer-contact li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.6;
}

/* ===================================
   新增首页元素样式
   =================================== */



/* 首页新闻预览 */
.home-news-section {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
}

.section-title {
    font-size: 2rem;
    color: var(--color-text-primary);
    position: relative;
    padding-left: 1rem;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10%;
    height: 80%;
    width: 4px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

.view-more-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color var(--transition-fast);
}

.view-more-link:hover {
    color: var(--color-primary);
}

.home-news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.news-preview-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
}

.news-preview-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.news-card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.news-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.news-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.4;
}

.news-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    flex: 1;
}

.read-more {
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-top: auto;
}

/* 合作伙伴区域 */
.partners-section {
    padding: 6rem 2rem;
    background: var(--color-bg-secondary);
    text-align: center;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 3rem auto 0;
}

.partner-item {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    transition: all var(--transition-base);
}

.partner-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    color: var(--color-primary);
}

.partner-icon {
    font-size: 1.5rem;
}

/* ===================================
   内页通用样式
   =================================== */
.content-header {
    text-align: center;
    margin-bottom: 4rem;
}

.page-title {
    font-size: 2.5rem;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    font-family: var(--font-display);
}

.title-decoration {
    height: 4px;
    width: 60px;
    background: var(--color-accent);
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* ===================================
   Markdown 内容渲染
   =================================== */
.markdown-content {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 3rem 4rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.markdown-content h1 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary-dark);
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border-light);
}

.markdown-content h2 {
    font-size: 1.8rem;
    margin-top: 2.5rem;
    margin-bottom: 1.2rem;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.markdown-content h2::before {
    content: '';
    display: block;
    width: 6px;
    height: 24px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

.markdown-content h3 {
    font-size: 1.4rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.markdown-content p {
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.markdown-content ul, .markdown-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--color-text-secondary);
}

.markdown-content li {
    margin-bottom: 0.6rem;
    line-height: 1.7;
}

.markdown-content strong {
    color: var(--color-primary);
    font-weight: 600;
}

.markdown-content blockquote {
    background: var(--color-bg-secondary);
    border-left: 4px solid var(--color-accent);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 2rem 0;
    box-shadow: var(--shadow-md);
}

/* ===================================
   团队成员页面
   =================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.team-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.team-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--color-bg-secondary);
    transition: background var(--transition-base);
}

.team-card:hover::before {
    background: var(--color-primary);
}

.team-card-avatar {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    background: var(--color-bg-primary);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
}

.team-card-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.team-card-title {
    font-size: 0.95rem;
    color: var(--color-accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.team-card-bio {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.team-card-contact {
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border-light);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* ===================================
   研究成果页面
   =================================== */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.research-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.research-card-image {
    height: 160px;
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.research-card-content {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.research-card-category {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
    align-self: flex-start;
}

.research-card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.research-card-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.research-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-light);
}

.research-card-link {
    color: var(--color-accent);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
}

/* ===================================
   期刊论文页面
   =================================== */
.publications-list {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 0 1rem;
}

.publication-item {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
    border: 1px solid var(--color-border-light);
    border-left-width: 4px;
}

.publication-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.publication-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.publication-authors {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.8rem;
}

.publication-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.2rem;
}

.publication-venue {
    font-style: italic;
    font-weight: 600;
    color: var(--color-primary);
}

.publication-links {
    display: flex;
    gap: 1rem;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: var(--color-bg-primary);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    border: 1px solid var(--color-border);
}

.publication-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ===================================
   新闻资讯页面
   =================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.news-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.news-card-image {
    height: 180px;
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.news-card-content {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
    align-self: flex-start;
}

.news-card-date {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.news-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.news-card-excerpt {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===================================
   文章详情页
   =================================== */
.article-header {
    max-width: 900px;
    margin: 0 auto 2rem;
    padding: 0 1rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-primary);
}

.article-content {
    /* Inherits from .markdown-content */
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    align-items: center;
}

.article-category {
    background: var(--color-secondary);
    color: var(--color-primary);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

/* ===================================
   响应式设计 - 移动设备适配
   =================================== */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .header-container {
        padding: 1rem;
        gap: 1rem;
    }

    .logo-title {
        font-size: 1.1rem;
    }

    .nav-list {
        gap: 0.3rem;
    }

    .nav-link {
        padding: 0.5rem 0.7rem;
        font-size: 0.85rem;
    }

    .hero-section {
        padding: 6rem 2rem 4rem;
        gap: 2rem;
    }

    .hero-content {
        margin-left: 0;
        max-width: 100%;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-visual {
        display: none;
    }

    .preview-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .tech-keywords-card {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        align-items: center;
    }

    .tech-item {
        width: 100%;
        justify-content: center;
        text-align: center;
        padding: 0.8rem;
    }

    .tech-item:nth-child(n) {
        align-self: center;
        margin: 0;
    }

    .research-preview {
        padding: 4rem 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

/* 移动设备 (max-width: 768px) */
@media (max-width: 768px) {
    /* 顶部导航栏 */
    .header-container {
        padding: 0.75rem 1rem;
        gap: 0.5rem;
    }

    .logo-section {
        gap: 0.75rem;
    }

    .logo-icon {
        width: 40px;
        height: 40px;
    }

    .logo-title {
        font-size: 1rem;
    }

    .logo-subtitle {
        font-size: 0.6rem;
    }

    /* 汉堡菜单按钮 */
    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* 导航菜单 */
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: white;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.15);
        transition: right var(--transition-base);
        z-index: 999;
        padding: 80px 2rem 2rem;
        overflow-y: auto;
    }

    .main-nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
    }

    .nav-link {
        padding: 1rem 0;
        font-size: 1rem;
        border-bottom: 1px solid var(--color-border-light);
        text-transform: none;
        letter-spacing: normal;
    }

    .nav-link::before {
        display: none;
    }

    .nav-link:hover::before {
        width: 0;
    }

    .nav-link.active {
        color: var(--color-primary);
        background: var(--color-secondary);
        border-radius: var(--radius-sm);
    }

    /* 搜索按钮 */
    .search-toggle {
        width: 40px;
        height: 40px;
    }

    /* 搜索模态框 */
    .search-modal {
        padding-top: 60px;
    }

    .search-container {
        margin: 0 1rem;
        max-width: calc(100% - 2rem);
    }

    .search-header {
        padding: 1rem 1.5rem 0.75rem;
    }

    .search-header h2 {
        font-size: 1.25rem;
    }

    .search-input-wrapper {
        padding: 0.75rem 1.5rem;
    }

    .search-input-wrapper input {
        font-size: 1rem;
        padding: 0.8rem 0.8rem 0.8rem 2.5rem;
    }

    .search-results {
        padding: 0 1.5rem 0.75rem;
    }

    .search-result-item {
        padding: 0.75rem;
    }

    /* 主内容区域 */
    .main-content {
        margin-top: 65px;
    }

    /* Hero 区域 */
    .hero-section {
        padding: 3rem 1.5rem 2rem;
        flex-direction: column;
        gap: 2rem;
        align-items: flex-start;
        min-height: auto;
    }

    .hero-content {
        width: 100%;
        margin-left: 0;
        text-align: left;
    }

    .hero-badge {
        padding: 0.35rem 0.7rem;
        margin-bottom: 0.8rem;
        font-size: 0.7rem;
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
    }

    .badge-dot {
        width: 6px;
        height: 6px;
    }

    .hero-title {
        font-size: 1.8rem;
        line-height: 1.25;
        margin-bottom: 0.8rem;
        font-weight: 700;
    }

    .title-line {
        display: block;
    }

    .title-line.highlight {
        color: var(--color-primary);
    }

    .hero-description {
        font-size: 0.95rem;
        line-height: 1.7;
        margin-bottom: 1.25rem;
        max-width: 100%;
        color: var(--color-text-secondary);
    }

    .hero-actions {
        flex-direction: column;
        gap: 0.6rem;
        width: 100%;
    }

    .btn {
        width: 100%;
        padding: 0.7rem 1.25rem;
        font-size: 0.9rem;
        font-weight: 600;
        border-radius: var(--radius-sm);
        transition: all var(--transition-base);
    }

    .btn:active {
        transform: scale(0.98);
    }

    /* 技术关键词卡片 */
    .tech-keywords-card {
        width: 100%;
        max-width: 100%;
        background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
        backdrop-filter: blur(10px);
        border-radius: var(--radius-md);
        padding: 1.25rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.6rem;
    }

    .tech-item {
        width: 100%;
        padding: 0.6rem 0.5rem;
        font-size: 0.85rem;
        background: rgba(255,255,255,0.8);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        gap: 0.5rem;
        transition: all var(--transition-base);
        box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    }

    .tech-item:active {
        transform: scale(0.98);
        box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    }

    .tech-icon {
        font-size: 1.2rem;
        flex-shrink: 0;
    }

    .tech-text {
        font-size: 0.8rem;
        line-height: 1.3;
        font-weight: 500;
    }


    /* 研究预览 */
    .research-preview {
        padding: 2rem 1.5rem;
        margin: 1.5rem 1rem;
        border-radius: var(--radius-md);
        background: white;
        box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }

    .section-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 0.5rem;
        margin-bottom: 1.25rem;
    }

    .section-title {
        font-size: 1.3rem;
        margin-bottom: 0;
        font-weight: 700;
    }

    .view-more-link {
        font-size: 0.85rem;
        display: flex;
        align-items: center;
        gap: 0.25rem;
        color: var(--color-primary);
        font-weight: 500;
    }

    .preview-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .preview-card {
        padding: 1.25rem;
        border-radius: var(--radius-sm);
        background: var(--color-background);
        transition: all var(--transition-base);
        border: 1px solid var(--color-border-light);
    }

    .preview-card:active {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .card-icon {
        font-size: 1.8rem;
        margin-bottom: 0.6rem;
    }

    .card-title {
        font-size: 1rem;
        margin-bottom: 0.5rem;
        font-weight: 600;
    }

    .card-desc {
        font-size: 0.85rem;
        line-height: 1.6;
        color: var(--color-text-secondary);
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* 首页新闻 */
    .home-news-section {
        padding: 3rem 1.5rem;
    }

    .home-news-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .news-preview-card {
        padding: 1rem;
    }

    .news-card-title {
        font-size: 1rem;
    }

    .news-excerpt {
        font-size: 0.85rem;
    }

    /* 合作伙伴 */
    .partners-section {
        padding: 3rem 1.5rem;
    }

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

    .partner-item {
        font-size: 0.9rem;
        padding: 0.75rem;
    }

    /* 内容标题 */
    .content-header {
        padding: 2rem 1.5rem 1rem;
    }

    .page-title {
        font-size: 1.75rem;
    }

    /* 研究成果网格 */
    .research-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1.5rem;
    }

    .research-card {
        padding: 1.5rem;
    }

    .research-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .research-card-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .research-card-title {
        font-size: 1.15rem;
    }

    /* 团队成员网格 */
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 0 1.5rem;
    }

    .team-card {
        padding: 1.25rem;
    }

    .team-avatar {
        width: 60px;
        height: 60px;
        font-size: 1.75rem;
    }

    .team-name {
        font-size: 1rem;
    }

    .team-title {
        font-size: 0.85rem;
    }

    .team-bio {
        font-size: 0.85rem;
    }

    /* 期刊论文列表 */
    .publications-list {
        padding: 0 1.5rem;
    }

    .publication-card {
        padding: 1.25rem;
    }

    .publication-title {
        font-size: 0.95rem;
    }

    .publication-authors {
        font-size: 0.85rem;
    }

    /* 新闻网格 */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1.5rem;
    }

    .news-card {
        flex-direction: column;
    }

    .news-card-image {
        height: 150px;
    }

    .news-card-content {
        padding: 1.25rem;
    }

    .news-card-title {
        font-size: 1rem;
    }

    .news-card-excerpt {
        font-size: 0.85rem;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* 文章详情 */
    .article-header {
        padding: 0 1.5rem;
    }

    .article-content {
        padding: 0 1.5rem;
    }

    .article-content h1 {
        font-size: 1.75rem;
    }

    .article-content h2 {
        font-size: 1.4rem;
    }

    .article-content h3 {
        font-size: 1.15rem;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    /* Markdown 内容 */
    .markdown-content {
        padding: 1.5rem;
    }

    .markdown-content h1 {
        font-size: 1.75rem;
    }

    .markdown-content h2 {
        font-size: 1.4rem;
    }

    .markdown-content h3 {
        font-size: 1.15rem;
    }

    .markdown-content p {
        font-size: 0.95rem;
    }

    .markdown-content ul,
    .markdown-content ol {
        padding-left: 1.25rem;
    }

    .markdown-content li {
        margin-bottom: 0.5rem;
    }

    .markdown-content code {
        font-size: 0.85rem;
    }

    .markdown-content pre {
        padding: 1rem;
        border-radius: var(--radius-sm);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .markdown-content blockquote {
        padding: 1rem;
        margin: 1rem 0;
        font-size: 0.9rem;
    }

    .markdown-content table {
        font-size: 0.85rem;
    }

    .markdown-content table th,
    .markdown-content table td {
        padding: 0.5rem;
    }

    /* 页脚 */
    .main-footer {
        padding: 3rem 1.5rem 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-title {
        font-size: 1.1rem;
    }

    .footer-desc {
        font-size: 0.9rem;
    }

    .footer-links li,
    .footer-contact li {
        font-size: 0.9rem;
    }

    .footer-bottom {
        font-size: 0.8rem;
        padding-top: 1.5rem;
    }

    /* 遮罩层 */
    .nav-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-base);
    }

    .nav-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }
}

/* 小屏幕手机 (max-width: 480px) */
@media (max-width: 480px) {
    /* 顶部导航 */
    .logo-title {
        font-size: 0.9rem;
    }

    .logo-subtitle {
        display: none;
    }

    /* Hero 区域 */
    .hero-section {
        padding: 3rem 1rem 2rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }


    .stat-number {
        font-size: 2rem;
    }

    /* 研究预览 */
    .research-preview {
        padding: 2rem 1rem;
    }

    .section-title {
        font-size: 1.3rem;
    }

    .preview-card {
        padding: 1.25rem;
    }

    /* 合作伙伴 */
    .partners-grid {
        grid-template-columns: 1fr;
    }

    /* 团队成员 */
    .team-grid {
        grid-template-columns: 1fr;
    }

    /* 搜索 */
    .search-container {
        margin: 0 0.5rem;
        max-width: calc(100% - 1rem);
    }

    .search-header {
        padding: 1rem;
    }

    .search-input-wrapper {
        padding: 0.5rem 1rem;
    }

    /* 页脚 */
    .main-footer {
        padding: 2rem 1rem 1rem;
    }
}

/* 横屏手机适配 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        padding: 2rem 1.5rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 0.85rem;
        margin-bottom: 1rem;
    }

    .hero-actions {
        flex-direction: row;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
}

/* 添加遮罩层元素样式 */
.nav-overlay {
    display: none;
}

@media (max-width: 768px) {
    .nav-overlay {
        display: block;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-link,
    .btn,
    .card,
    .tech-item,
    .search-result-item {
        -webkit-tap-highlight-color: transparent;
    }

    .btn:active {
        transform: scale(0.98);
    }

    .card:active,
    .tech-item:active {
        transform: scale(0.99);
    }
}

/* ===================================
   KaTeX 数学公式样式
   =================================== */
.markdown-content .katex-display {
    margin: 1.5rem 0;
    overflow-x: auto;
    padding: 1rem;
}

.markdown-content .katex {
    font-size: 1.05em;
}

.markdown-content .katex-display > .katex {
    text-align: center;
}

.markdown-content .katex-display .katex {
    white-space: normal;
}