:root {
    --bg-dark: #0f1424;
    --bg-darker: #0a0e1b;
    --bg-card: rgba(30, 41, 59, 0.25);
    --blue-primary: #4660e8;
    --blue-light: #6f85f2;
    --teal: #44d9e6;
    --text-white: #ffffff;
    --text-light: rgba(255, 255, 255, 0.85);
    --text-muted: rgba(255, 255, 255, 0.6);
    --border-light: rgba(255, 255, 255, 0.1);
    --shadow-blue: 0 0 20px rgba(70, 96, 232, 0.25);
    --shadow-teal: 0 0 20px rgba(68, 217, 230, 0.25);
}

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

body, html {
    height: 100%;
    width: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    overflow: hidden;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 滚动样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(68, 217, 230, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(68, 217, 230, 0.4);
}

/* 布局 */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    z-index: 1000;
    background-color: rgba(10, 14, 27, 0.75);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(70, 96, 232, 0.1);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 18px;
    color: var(--text-white);
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background-color: var(--blue-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-size: 18px;
    box-shadow: var(--shadow-blue);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 5px;
}

.main-nav a {
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
}

.main-nav a i {
    margin-right: 6px;
    font-size: 14px;
}

.main-nav a:hover {
    color: var(--text-white);
    background-color: rgba(70, 96, 232, 0.1);
}

.main-nav a.active {
    color: var(--text-white);
    background-color: var(--blue-primary);
    box-shadow: var(--shadow-blue);
}

/* 页面内容 */
.page-content {
    height: 100vh;
    overflow: hidden;
    position: relative;
    padding-top: 60px; /* 头部高度 */
}

/* 全屏滚动容器 */
.fullpage-container {
    position: relative;
    height: calc(100vh - 60px);
    overflow: hidden;
}

.fullpage-section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s;
}

.fullpage-section.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

/* 首页样式 */
.hero-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
    position: relative;
    padding: 0 60px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(70, 96, 232, 0.15), transparent 70%);
    z-index: 0;
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--blue-primary), var(--teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.6rem;
    color: rgba(169, 176, 235, 0.9);
    font-weight: 500;
    margin-bottom: 15px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 25px;
    max-width: 620px;
    line-height: 1.6;
}

/* 标签和按钮 */
.tags-container {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 7px 15px;
    background: rgba(68, 217, 230, 0.1);
    color: var(--teal);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-right: 12px;
    margin-bottom: 12px;
}

.tag i {
    margin-right: 6px;
    font-size: 12px;
}

.buttons-container {
    display: flex;
    flex-wrap: wrap;
    margin-top: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    margin-right: 15px;
    margin-bottom: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn i {
    margin-right: 8px;
}

.btn-primary {
    background-color: var(--blue-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(70, 96, 232, 0.3);
}

.btn-secondary {
    background-color: rgba(70, 96, 232, 0.1);
    color: white;
    border: 1px solid rgba(70, 96, 232, 0.3);
}

.btn-primary:hover {
    background-color: #5470f8;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(70, 96, 232, 0.4);
}

.btn-secondary:hover {
    background-color: rgba(70, 96, 232, 0.2);
    transform: translateY(-2px);
}

/* 什么是MCP部分 */
.what-is-mcp {
    margin-top: 40px;
    position: relative;
    padding-left: 30px;
}

.mcp-timeline-dot {
    position: absolute;
    left: 0;
    top: 0;
    width: 30px;
    height: 30px;
    background-color: var(--blue-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    box-shadow: var(--shadow-blue);
}

.mcp-timeline-line {
    position: absolute;
    left: 15px;
    top: 30px;
    width: 2px;
    height: calc(100% - 30px);
    background: linear-gradient(to bottom, var(--blue-primary), rgba(70, 96, 232, 0.1));
}

.mcp-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--teal);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.mcp-title i {
    margin-right: 10px;
    font-size: 20px;
}

.mcp-content {
    background-color: rgba(68, 217, 230, 0.08);
    border-left: 3px solid var(--teal);
    padding: 20px;
    border-radius: 6px;
    margin-bottom: 30px;
}

.mcp-content p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 滚动指示器 */
.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-muted);
    font-size: 13px;
    animation: pulse 2s infinite;
}

.scroll-down i {
    font-size: 24px;
    margin-top: 8px;
    color: var(--teal);
}

@keyframes pulse {
    0% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
    100% { transform: translateX(-50%) translateY(0); }
}

/* 页面指示器 */
.page-indicator {
    position: fixed;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1000;
}

.indicator-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.indicator-dot::after {
    content: attr(data-title);
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    background-color: rgba(10, 14, 27, 0.9);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.indicator-dot:hover {
    transform: scale(1.3);
    background-color: rgba(255, 255, 255, 0.4);
}

.indicator-dot:hover::after {
    opacity: 1;
    visibility: visible;
    right: 20px;
}

.indicator-dot.active {
    background-color: var(--teal);
    box-shadow: 0 0 10px rgba(68, 217, 230, 0.6);
}

/* 页面加载和转场 */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-darker);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid transparent;
    border-top-color: var(--teal);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

.loading-text {
    color: var(--text-muted);
    font-size: 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 背景粒子 */
.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    background-color: var(--teal);
    border-radius: 50%;
    opacity: 0.5;
    animation: float 15s linear infinite;
}

@keyframes float {
    0% {
        transform: translateY(100vh) translateX(0) rotate(0);
        opacity: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-20vh) translateX(100px) rotate(360deg);
        opacity: 0;
    }
}

/* 特性标签样式 */
.feature-tags {
    display: flex;
    flex-wrap: wrap;
    margin-top: 25px;
    gap: 10px;
}

.feature-tag {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    background: rgba(68, 217, 230, 0.1);
    color: var(--teal);
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.feature-tag i {
    margin-right: 8px;
    font-size: 16px;
}

.feature-tag:hover {
    background: rgba(68, 217, 230, 0.2);
    transform: translateY(-3px);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-section {
        padding: 0 20px;
    }
    
    .main-nav {
        display: none;
    }
    
    .indicator-dot {
        width: 8px;
        height: 8px;
    }
    
    .indicator-dot::after {
        display: none;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 14px;
        display: block;
        width: 100%;
        text-align: center;
    }
}