/* ===== CSS 变量与全局样式 ===== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b0;
    --text-muted: #6a6a7a;
    --accent-cyan: #00f0ff;
    --accent-purple: #7b2dff;
    --accent-pink: #ff2d95;
    --gradient-main: linear-gradient(135deg, #00f0ff 0%, #7b2dff 100%);
    --gradient-glow: linear-gradient(135deg, rgba(0, 240, 255, 0.15) 0%, rgba(123, 45, 255, 0.15) 100%);
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(18, 18, 26, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.3);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-cyan) var(--bg-secondary);
}

::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-main);
    border-radius: 4px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== 粒子画布 ===== */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: 0.6rem 0;
    background: rgba(10, 10, 15, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 2px;
}

.nav-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--glass-border);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
    transition: var(--transition-fast);
}

.nav-logo-img:hover {
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
    transform: scale(1.05);
}

.logo-bracket {
    color: var(--accent-cyan);
    text-shadow: 0 0 10px var(--accent-cyan);
}

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    transition: var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: var(--transition-normal);
}

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

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 6rem 2rem 4rem;
}

.hero-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--accent-cyan);
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease-out;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 1rem;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* 故障效果 */
.glitch {
    position: relative;
    animation: glitch 5s infinite;
}

@keyframes glitch {
    0%, 90%, 100% { transform: translate(0); }
    92% { transform: translate(-2px, 2px); }
    94% { transform: translate(2px, -2px); }
    96% { transform: translate(-2px, -2px); }
    98% { transform: translate(2px, 2px); }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    min-height: 2rem;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.typewriter {
    color: var(--accent-cyan);
}

.type-cursor {
    animation: blink 1s infinite;
    color: var(--accent-cyan);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 1s both;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-plus {
    color: var(--accent-cyan);
    font-size: 1.5rem;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: fadeIn 1s ease-out 1.5s both;
}

.scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: var(--text-muted);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--gradient-main);
    animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-main);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 240, 255, 0.5);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.btn-sm {
    padding: 0.6rem 1.2rem;
    font-size: 0.8rem;
}

.btn-full {
    width: 100%;
}

/* ===== 通用 Section 样式 ===== */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    padding: 0.4rem 1rem;
    background: var(--gradient-glow);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 50px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.text-gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ===== 特性卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--accent-cyan);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

/* ===== 服务卡片 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: rgba(123, 45, 255, 0.3);
    box-shadow: 0 0 30px rgba(123, 45, 255, 0.2);
}

.service-number {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
}

.service-tags li {
    font-size: 0.75rem;
    padding: 0.3rem 0.75rem;
    background: var(--gradient-glow);
    border: 1px solid rgba(0, 240, 255, 0.15);
    border-radius: 50px;
    color: var(--accent-cyan);
}

/* ===== 资源卡片 ===== */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.resource-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.resource-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.resource-type {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.7rem;
    letter-spacing: 1px;
    padding: 0.3rem 0.75rem;
    background: var(--gradient-main);
    border-radius: 50px;
    color: var(--bg-primary);
    font-weight: 600;
}

.resource-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.resource-icon svg {
    width: 24px;
    height: 24px;
    color: var(--accent-cyan);
}

.resource-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.resource-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.resource-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* ===== Markdown 编辑器 ===== */
.markdown-section {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
}

.markdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.markdown-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.markdown-header svg {
    color: var(--accent-cyan);
}

.markdown-tabs {
    display: flex;
    gap: 0.5rem;
}

.md-tab {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.md-tab:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.md-tab.active {
    background: var(--gradient-main);
    border-color: transparent;
    color: var(--bg-primary);
}

.markdown-container {
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    gap: 0;
    min-height: 300px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    overflow: hidden;
}

.markdown-container[data-mode="editor"] {
    grid-template-columns: 1fr;
}

.markdown-container[data-mode="editor"] .markdown-preview,
.markdown-container[data-mode="editor"] .markdown-divider {
    display: none;
}

.markdown-container[data-mode="preview"] {
    grid-template-columns: 1fr;
}

.markdown-container[data-mode="preview"] .markdown-editor,
.markdown-container[data-mode="preview"] .markdown-divider {
    display: none;
}

.markdown-container[data-mode="preview"] .markdown-preview {
    display: block;
}

.markdown-editor {
    background: var(--bg-secondary);
    border: none;
    padding: 1.5rem;
    color: var(--text-primary);
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 0.9rem;
    line-height: 1.7;
    resize: none;
    outline: none;
}

.markdown-divider {
    background: var(--glass-border);
}

.markdown-preview {
    background: var(--bg-secondary);
    padding: 1.5rem;
    overflow-y: auto;
    max-height: 400px;
}

/* Markdown 渲染样式 */
.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
    margin: 1.5rem 0 1rem;
    font-weight: 600;
}

.markdown-preview h1 { font-size: 1.8rem; }
.markdown-preview h2 { font-size: 1.5rem; }
.markdown-preview h3 { font-size: 1.25rem; }

.markdown-preview p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.markdown-preview code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 0.85em;
    color: var(--accent-cyan);
}

.markdown-preview pre {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

.markdown-preview pre code {
    background: none;
    padding: 0;
}

.markdown-preview a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.markdown-preview a:hover {
    text-decoration: underline;
}

.markdown-preview ul,
.markdown-preview ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

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

.markdown-preview blockquote {
    border-left: 3px solid var(--accent-cyan);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-muted);
    font-style: italic;
}

.markdown-preview img {
    max-width: 100%;
    border-radius: 8px;
}

.markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.markdown-preview th,
.markdown-preview td {
    border: 1px solid var(--glass-border);
    padding: 0.75rem;
    text-align: left;
}

.markdown-preview th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

/* ===== 支持卡片 ===== */
.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.support-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition-normal);
}

.support-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.support-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
}

.support-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent-cyan);
}

.support-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.support-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.card-link:hover {
    text-shadow: 0 0 10px var(--accent-cyan);
}

/* ===== 联系方式 ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: var(--transition-normal);
}

.contact-card:hover {
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.contact-card-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    flex-shrink: 0;
}

.contact-card-icon svg {
    width: 24px;
    height: 24px;
    color: var(--accent-cyan);
}

.contact-card h4 {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.contact-card p {
    font-size: 1rem;
    color: var(--text-primary);
    word-break: break-all;
}

/* ===== 表单样式 ===== */
.contact-form {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
}

.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    pointer-events: none;
    transition: var(--transition-fast);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.75rem;
    color: var(--accent-cyan);
    background: var(--bg-secondary);
    padding: 0 0.25rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== 动画 ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        gap: 1.5rem;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-normal);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .hero-stats {
        gap: 2rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .markdown-container {
        grid-template-columns: 1fr;
    }

    .markdown-container[data-mode="split"] .markdown-preview {
        display: none;
    }

    .markdown-container[data-mode="split"] .markdown-divider {
        display: none;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .section {
        padding: 4rem 0;
    }

    .hero {
        padding: 5rem 1rem 3rem;
    }

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

    .hero-actions .btn {
        width: 100%;
    }
}