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

/* 性能优化 */
html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* GPU加速 - 使用transform和opacity进行动画 */
.hero,
.overview-card,
.scenery-card,
.app-card,
.terminal-card,
.milestone-card,
.chart-container,
.hero-bg-layer,
.card-icon,
.layer-icon {
    will-change: transform, opacity;
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* 减少重绘 - 使用content-visibility */
img {
    content-visibility: auto;
    contain-intrinsic-size: 300px 200px;
}

.section {
    content-visibility: auto;
    contain-intrinsic-size: auto 800px;
}

/* 优化动画性能 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:root {
    /* 藏族传统五色 */
    --tibetan-red: #c41e3a;      /* 红色 - 火焰、太阳 */
    --tibetan-gold: #d4af37;     /* 金色 - 大地、佛教 */
    --tibetan-blue: #1e40af;     /* 蓝色 - 天空 */
    --tibetan-white: #f8f9fa;    /* 白色 - 云朵、纯洁 */
    --tibetan-green: #10b981;    /* 绿色 - 水、生命 */
    
    /* 主色调 */
    --primary-color: #c41e3a;    /* 使用藏红色作为主色 */
    --secondary-color: #d4af37;  /* 使用藏金色作为辅色 */
    --accent-color: #1e40af;     /* 使用藏蓝色作为强调色 */
    --success-color: #10b981;    /* 保持绿色 */
    
    /* 文字颜色 */
    --text-dark: #1f2937;
    --text-light: #6b7280;
    
    /* 背景颜色 */
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #fef3f2 0%, #fde8e8 50%, #fef3c7 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    position: relative;
}

/* 动态背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(196, 30, 58, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(212, 175, 55, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(30, 64, 175, 0.08) 0%, transparent 50%);
    animation: backgroundFloat 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes backgroundFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(5deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(-5deg);
    }
}

/* 确保内容在背景之上 */
header, section, footer {
    position: relative;
    z-index: 1;
}

html {
    scroll-behavior: smooth;
    scroll-snap-type: y proximity;
    scroll-padding-top: 80px; /* 为固定header留出空间 */
    scroll-padding-bottom: 0;
}

/* 为每个主要section添加滚动吸附点 */
.hero,
.section {
    scroll-snap-align: start;
    scroll-snap-stop: normal;
}

/* footer不参与scroll-snap，确保可以滚动到底部 */
footer {
    scroll-snap-align: none;
}

/* 浮动装饰元素 */
.floating-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.shape {
    position: absolute;
    opacity: 0.1;
    animation: float-random 20s ease-in-out infinite;
}

.shape-1 {
    top: 10%;
    left: 10%;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    animation-delay: 0s;
}

.shape-2 {
    top: 60%;
    right: 15%;
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation-delay: 3s;
}

.shape-3 {
    bottom: 20%;
    left: 20%;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    border-radius: 20% 80% 80% 20% / 20% 20% 80% 80%;
    animation-delay: 6s;
}

.shape-4 {
    top: 40%;
    right: 30%;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-radius: 50% 50% 0 50%;
    animation-delay: 9s;
}

@keyframes float-random {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg) scale(1);
    }
    25% {
        transform: translate(30px, -30px) rotate(90deg) scale(1.1);
    }
    50% {
        transform: translate(-20px, 40px) rotate(180deg) scale(0.9);
    }
    75% {
        transform: translate(40px, 20px) rotate(270deg) scale(1.05);
    }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 滚动进度指示器 */
.scroll-progress {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    z-index: 999;
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.scroll-progress.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--tibetan-red), var(--tibetan-gold), var(--tibetan-blue));
    width: 0%;
    transition: width 0.1s ease;
    box-shadow: 0 0 10px rgba(196, 30, 58, 0.5);
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(196, 30, 58, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.logo-icon:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.5);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links li {
    display: flex;
    align-items: center;
    position: relative;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
    padding-bottom: 5px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--tibetan-red), var(--tibetan-gold));
    border-radius: 2px;
    animation: slideIn 0.3s ease;
}

/* 应急救援链接特殊样式 */
.nav-links a.emergency-link {
    background: linear-gradient(135deg, #c41e3a 0%, #dc2626 100%);
    color: white !important;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(196, 30, 58, 0.3);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-links a.emergency-link:hover {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.5);
    transform: translateY(-2px);
}

.nav-links a.emergency-link i {
    animation: pulse 2s ease-in-out infinite;
}

/* 下拉菜单样式 */
.nav-links .dropdown {
    position: relative;
}

.nav-links .dropdown-toggle {
    cursor: pointer;
}

.nav-links .dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    overflow: hidden;
    padding: 0.5rem 0;
}

.nav-links .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-links .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    color: var(--text-dark) !important;
    text-decoration: none;
    transition: all 0.3s ease;
    background: white;
    white-space: nowrap;
}

.nav-links .dropdown-item:hover {
    background: linear-gradient(135deg, #c41e3a 0%, #dc2626 100%);
    color: white !important;
}

.nav-links .dropdown-item i {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

.nav-links .dropdown-item span {
    font-weight: 500;
    font-size: 0.95rem;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes slideIn {
    from {
        width: 0;
        opacity: 0;
    }
    to {
        width: 100%;
        opacity: 1;
    }
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* Hero Section */
.hero {
    margin-top: 80px;
    color: white;
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 600px;
}

/* Hero背景层 - 用于平滑切换 */
.hero-bg-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0;
    transition: opacity 2s ease-in-out;
    z-index: 0;
}

.hero-bg-layer.active {
    opacity: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4));
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 6s ease-in-out infinite;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 15px;
    animation: fadeInUp 1s ease 0.4s both;
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Sections */
.section {
    padding: 5rem 0;
    position: relative;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

.section.bg-light {
    background: rgba(255, 255, 255, 0.9);
    position: relative;
}

.section.bg-light::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(79, 70, 229, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 20%, rgba(245, 158, 11, 0.03) 0%, transparent 50%);
    pointer-events: none;
    animation: sectionPulse 15s ease-in-out infinite;
}

@keyframes sectionPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--tibetan-red), var(--tibetan-gold), var(--tibetan-blue));
    border-radius: 2px;
    animation: expandWidth 1s ease 0.3s both;
}

@keyframes expandWidth {
    from {
        width: 0;
    }
    to {
        width: 80px;
    }
}

/* Overview Section */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.overview-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: box-shadow 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

.overview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.1), rgba(212, 175, 55, 0.1));
    opacity: 0;
    transition: opacity 0.4s;
}

.overview-card:hover {
    box-shadow: 0 20px 40px rgba(196, 30, 58, 0.2);
}

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

.card-icon {
    font-size: 3rem;
    color: var(--tibetan-red);
    margin-bottom: 1rem;
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: inline-block;
    position: relative;
    transform-style: preserve-3d;
    animation: iconFloat 3s ease-in-out infinite;
}

.card-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(196, 30, 58, 0.2) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: -1;
    animation: iconGlow 2s ease-in-out infinite;
}

.card-icon i {
    display: inline-block;
    transform-style: preserve-3d;
    filter: drop-shadow(0 4px 8px rgba(196, 30, 58, 0.3));
}

.overview-card:hover .card-icon {
    transform: rotateY(360deg) scale(1.3);
    color: var(--accent-color);
    animation: none;
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0) rotateZ(0deg);
    }
    50% {
        transform: translateY(-10px) rotateZ(5deg);
    }
}

@keyframes iconGlow {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.2);
    }
}

.overview-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.overview-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.project-background {
    background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 50%, #e0e7ff 100%);
    padding: 3rem;
    border-radius: 15px;
    margin-top: 3rem;
    position: relative;
    overflow: visible;
    box-shadow: 0 10px 40px rgba(79, 70, 229, 0.1);
    width: 100% !important;
    max-width: none !important;
    min-width: 100%;
}

.project-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    animation: backgroundShine 8s ease-in-out infinite;
}

@keyframes backgroundShine {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-20%, 20%) scale(1.2);
        opacity: 0.6;
    }
}

.project-background h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.background-images {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
    width: 100%;
    position: relative;
    z-index: 1;
}

.bg-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.bg-image:hover {
    transform: scale(1.05);
}

.background-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
    width: 100%;
    position: relative;
    z-index: 1;
}

.background-item {
    background: rgba(255, 255, 255, 0.6);
    padding: 1.5rem;
    border-radius: 10px;
    position: relative;
    z-index: 1;
}

.background-item strong {
    color: var(--primary-color);
    font-size: 1.1rem;
    display: block;
    margin-bottom: 0.5rem;
}

.background-item p {
    margin-top: 0.5rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Scenery Gallery Section */
.scenery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.scenery-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.scenery-card.large {
    grid-column: span 2;
    grid-row: span 2;
}

.scenery-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.scenery-card img {
    width: 100%;
    height: 100%;
    min-height: 250px;
    object-fit: cover;
    transition: transform 0.5s;
}

.scenery-card:hover img {
    transform: scale(1.1);
}

.scenery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: 2rem;
    transform: translateY(60%);
    transition: transform 0.3s;
}

.scenery-card:hover .scenery-overlay {
    transform: translateY(0);
}

.scenery-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.scenery-overlay p {
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.6;
}

.scenery-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    padding: 3rem;
    background: linear-gradient(135deg, #dbeafe 0%, #e0e7ff 50%, #fce7f3 100%);
    border-radius: 15px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(79, 70, 229, 0.1);
}

.scenery-features::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

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

.feature-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: inline-block;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 6px 12px rgba(79, 70, 229, 0.3));
    animation: featureIconBounce 4s ease-in-out infinite;
    position: relative;
}

.feature-item i::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: -1;
    animation: featureGlow 3s ease-in-out infinite;
}

.feature-item:hover i {
    transform: rotateY(360deg) scale(1.4) translateZ(20px);
    color: var(--accent-color);
    filter: drop-shadow(0 10px 20px rgba(245, 158, 11, 0.5));
}

@keyframes featureIconBounce {
    0%, 100% {
        transform: translateY(0) rotateX(0deg);
    }
    25% {
        transform: translateY(-8px) rotateX(10deg);
    }
    75% {
        transform: translateY(-5px) rotateX(-10deg);
    }
}

@keyframes featureGlow {
    0%, 100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1) rotate(0deg);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.3) rotate(180deg);
    }
}

.feature-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Architecture Section */
.architecture-diagram {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    align-items: center;
}

.arch-core {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: white;
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 10px 30px rgba(30, 64, 175, 0.3);
}

.arch-core h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.arch-core ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.arch-core li {
    background: rgba(255, 255, 255, 0.15);
    padding: 1rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
}

.arch-core li i {
    display: inline-block;
    margin-right: 0.5rem;
    transform-style: preserve-3d;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 3px 6px rgba(255, 255, 255, 0.3));
    animation: archIconBounce 3s ease-in-out infinite;
}

.arch-core li:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.arch-core li:hover i {
    transform: rotateY(360deg) scale(1.3) translateZ(10px);
    filter: drop-shadow(0 6px 12px rgba(255, 255, 255, 0.6));
}

@keyframes archIconBounce {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-5px) scale(1.1);
    }
}

.arch-terminals {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
}

.terminal-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.terminal-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.terminal-card h4 i {
    display: inline-block;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 5px 10px rgba(79, 70, 229, 0.3));
    animation: terminalIconFloat 4s ease-in-out infinite;
    position: relative;
}

.terminal-card h4 i::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.2) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: -1;
    animation: terminalGlow 3s ease-in-out infinite;
}

.terminal-card:hover h4 i {
    transform: rotateY(360deg) scale(1.4) translateZ(20px);
    color: var(--accent-color);
    filter: drop-shadow(0 10px 20px rgba(245, 158, 11, 0.6));
    animation: none;
}

@keyframes terminalIconFloat {
    0%, 100% {
        transform: translateY(0) rotateX(0deg);
    }
    50% {
        transform: translateY(-8px) rotateX(15deg);
    }
}

@keyframes terminalGlow {
    0%, 100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1) rotate(0deg);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.4) rotate(180deg);
    }
}

.terminal-card ul {
    list-style: none;
}

.terminal-card li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
}

.terminal-card li:last-child {
    border-bottom: none;
}

/* Tabs */
.tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 1rem 2rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Application Cards */
.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.app-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: box-shadow 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    transform-style: preserve-3d;
}

.app-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15), rgba(196, 30, 58, 0.1));
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.app-card:hover {
    box-shadow: 0 20px 40px rgba(212, 175, 55, 0.3);
}

.app-card:hover::after {
    opacity: 1;
}

.app-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.app-card h3 {
    padding: 1.5rem 1.5rem 1rem;
    font-size: 1.5rem;
    color: var(--text-dark);
}

.app-card p {
    padding: 0 1.5rem 1rem;
    color: var(--text-light);
}

.app-stats {
    padding: 1rem 1.5rem;
    background: var(--bg-light);
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Charts */
.chart-container {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-top: 2rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    min-height: 400px;
}

.chart-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 40%, rgba(79, 70, 229, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
    animation: chartBackgroundFloat 15s ease-in-out infinite;
    pointer-events: none;
}

.chart-container:hover {
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
    transform: translateY(-5px) rotateX(2deg);
}

.chart-container h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chart-container h3::before {
    content: '📊';
    display: inline-block;
    animation: chartIconPulse 2s ease-in-out infinite;
    transform-style: preserve-3d;
}

.chart-container canvas {
    max-height: 400px;
    min-height: 300px;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    transition: all 0.4s ease;
}

.chart-container:hover canvas {
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.15));
    transform: scale(1.02);
}

@keyframes chartBackgroundFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    50% {
        transform: translate(5%, -5%) rotate(5deg);
    }
}

@keyframes chartIconPulse {
    0%, 100% {
        transform: scale(1) rotateY(0deg);
    }
    50% {
        transform: scale(1.2) rotateY(180deg);
    }
}

/* Stations Section */
.stations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.station-visual,
.station-features {
    display: flex;
    flex-direction: column;
}

.station-visual h3,
.station-features h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.station-layers {
    background: white;
    border-radius: 15px;
    padding: 2rem 2rem 3rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    min-height: 400px;
}

.station-features .chart-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 400px;
}

.layer {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.layer:last-child {
    border-bottom: none;
}

.layer-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    display: inline-block;
    transform-style: preserve-3d;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 4px 8px rgba(79, 70, 229, 0.3));
    animation: layerIconPulse 3s ease-in-out infinite;
    position: relative;
}

.layer-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 140%;
    height: 140%;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: -1;
    animation: layerGlow 2s ease-in-out infinite;
}

.layer:hover .layer-icon {
    transform: rotateY(360deg) scale(1.3) translateZ(15px);
    color: var(--success-color);
    filter: drop-shadow(0 8px 16px rgba(16, 185, 129, 0.5));
}

@keyframes layerIconPulse {
    0%, 100% {
        transform: scale(1) rotateZ(0deg);
    }
    50% {
        transform: scale(1.1) rotateZ(10deg);
    }
}

@keyframes layerGlow {
    0%, 100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.7;
        transform: translate(-50%, -50%) scale(1.4);
    }
}

.layer-info strong {
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.5rem;
}

.feature-list {
    list-style: none;
    margin-top: 2rem;
}

.feature-list li {
    padding: 1rem;
    background: white;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.feature-list i {
    color: var(--success-color);
    margin-right: 0.5rem;
}

.station-strategy {
    margin-top: 3rem;
}

.station-strategy h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

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

.strategy-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.strategy-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.strategy-card h4 i {
    display: inline-block;
    transform-style: preserve-3d;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 3px 6px rgba(79, 70, 229, 0.3));
    animation: strategyIconSpin 6s linear infinite;
}

.strategy-card:hover h4 i {
    transform: rotateY(360deg) scale(1.3) translateZ(10px);
    color: var(--accent-color);
    filter: drop-shadow(0 6px 12px rgba(245, 158, 11, 0.5));
}

@keyframes strategyIconSpin {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(360deg);
    }
}

.strategy-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Investment Section */
.investment-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.invest-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.invest-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.invest-card:hover::before {
    left: 100%;
}

.invest-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.invest-card.highlight {
    background: linear-gradient(135deg, #c41e3a, #8b1538);
    color: white;
    transform: scale(1.05);
}

.invest-card.highlight:hover {
    transform: scale(1.08) translateY(-5px);
}

.invest-card.highlight-green {
    background: linear-gradient(135deg, #10b981, #047857);
    color: white;
    transform: scale(1.05);
}

.invest-card.highlight-green:hover {
    transform: scale(1.08) translateY(-5px);
}

.invest-card.highlight-orange {
    background: linear-gradient(135deg, #d4af37, #b8941f);
    color: white;
    transform: scale(1.05);
}

.invest-card.highlight-orange:hover {
    transform: scale(1.08) translateY(-5px);
}

.invest-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.big-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.invest-card p {
    opacity: 0.8;
}

.investment-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.detail-section h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.investment-table {
    width: 100%;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.investment-table thead {
    background: var(--primary-color);
    color: white;
}

.investment-table th,
.investment-table td {
    padding: 1rem;
    text-align: left;
}

.investment-table tbody tr {
    border-bottom: 1px solid var(--border-color);
}

.investment-table tbody tr:hover {
    background: var(--bg-light);
}

.roi-details {
    background: linear-gradient(135deg, #dbeafe 0%, #e0e7ff 50%, #fae8ff 100%);
    padding: 3rem;
    border-radius: 15px;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(79, 70, 229, 0.1);
}

.roi-details::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 40%, rgba(79, 70, 229, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    animation: roiFloat 12s ease-in-out infinite;
    pointer-events: none;
}

@keyframes roiFloat {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-5%, 5%);
    }
}

.roi-details h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    position: relative;
    z-index: 1;
}

.roi-details h4 {
    position: relative;
    z-index: 1;
}

/* 试点信息布局 */
.pilot-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.pilot-stations,
.pilot-investment {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.pilot-stations h4,
.pilot-investment h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.station-list li {
    padding: 1rem;
    margin-bottom: 0.8rem;
    background: linear-gradient(135deg, #fef3f2 0%, #fef3c7 100%);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.station-list li:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.2);
}

.station-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.9rem;
    margin-right: 0.5rem;
}

/* 投资明细 */
.investment-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.invest-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1rem;
    background: var(--bg-light);
    border-radius: 6px;
    transition: background 0.3s ease;
}

.invest-item:hover {
    background: #e5e7eb;
}

.invest-item.total {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    font-weight: bold;
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

.invest-label {
    color: var(--text-dark);
}

.invest-item.total .invest-label {
    color: white;
}

.invest-value {
    font-weight: bold;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.invest-item.total .invest-value {
    color: white;
}

.invest-note {
    margin-top: 1rem;
    padding: 0.8rem;
    background: #dbeafe;
    border-radius: 6px;
    color: var(--accent-color);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.roi-grid small {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: normal;
}

.roi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    position: relative;
    z-index: 1;
}

/* 三个月收益预测卡片 */
.three-month-revenue {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.month-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.month-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
}

.month-card.month-1::before {
    background: linear-gradient(90deg, #3b82f6, #2563eb);
}

.month-card.month-2::before {
    background: linear-gradient(90deg, #f59e0b, #d97706);
}

.month-card.month-3::before {
    background: linear-gradient(90deg, #10b981, #059669);
}

.month-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

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

.month-badge {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
}

.month-card.month-1 .month-badge {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.month-card.month-2 .month-badge {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.month-card.month-3 .month-badge {
    background: linear-gradient(135deg, #10b981, #059669);
}

.month-phase {
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 600;
}

.month-amount {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    text-align: center;
}

.month-card.month-1 .month-amount {
    color: #3b82f6;
}

.month-card.month-2 .month-amount {
    color: #f59e0b;
}

.month-card.month-3 .month-amount {
    color: #10b981;
    font-size: 2.8rem;
}

.month-desc {
    text-align: center;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 收入来源趋势图 */
.revenue-chart-wrapper {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.revenue-legend {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.legend-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.legend-dot.blue {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.legend-dot.orange {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.legend-dot.green {
    background: linear-gradient(135deg, #10b981, #059669);
}

.legend-text {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
}

.legend-text small {
    display: block;
    font-weight: normal;
    color: var(--text-light);
    font-size: 0.85rem;
    margin-top: 0.2rem;
}

.roi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    position: relative;
    z-index: 1;
}

.roi-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.roi-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}

.roi-item.highlight {
    background: var(--primary-color);
    color: white;
    font-size: 1.2rem;
}

.roi-item strong {
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.5rem;
}

.roi-item.highlight strong {
    color: white;
}

.roi-item span {
    font-weight: bold;
    color: var(--primary-color);
    font-size: 1.3rem;
}

.roi-item.highlight span {
    color: white;
}

/* Operations Section */
.operations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.ops-section {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.ops-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ops-section h3 i {
    display: inline-block;
    transform-style: preserve-3d;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 4px 8px rgba(79, 70, 229, 0.3));
    animation: opsIconRotate 8s ease-in-out infinite;
}

.ops-section:hover h3 i {
    transform: rotateY(360deg) rotateX(360deg) scale(1.4);
    color: var(--success-color);
    filter: drop-shadow(0 8px 16px rgba(16, 185, 129, 0.5));
}

@keyframes opsIconRotate {
    0%, 100% {
        transform: rotateY(0deg) rotateZ(0deg);
    }
    25% {
        transform: rotateY(90deg) rotateZ(90deg);
    }
    50% {
        transform: rotateY(180deg) rotateZ(180deg);
    }
    75% {
        transform: rotateY(270deg) rotateZ(270deg);
    }
}

.ops-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.ops-item strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.ops-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.constraints-section {
    margin-top: 4rem;
}

.constraints-section h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.constraints-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.constraint-map,
.feasibility-radar {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.constraint-map h4,
.feasibility-radar h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.map-legend {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.color-box {
    width: 30px;
    height: 30px;
    border-radius: 5px;
}

.constraint-note {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
    color: var(--text-light);
}

/* Timeline Section */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto 4rem;
}

.timeline-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
}

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.marker-dot {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 4px var(--primary-color);
}

.marker-line {
    width: 2px;
    flex: 1;
    background: var(--border-color);
    margin-top: 0.5rem;
}

.timeline-item:last-child .marker-line {
    display: none;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.4s ease;
    position: relative;
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    border-radius: 15px 0 0 15px;
    opacity: 0;
    transition: opacity 0.4s;
}

.timeline-content:hover::before {
    opacity: 1;
}

.timeline-date {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.timeline-content ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.timeline-content li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.timeline-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.timeline-goal {
    background: linear-gradient(135deg, #dbeafe 0%, #e0e7ff 100%);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
}

.timeline-goal::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    animation: goalShine 4s ease-in-out infinite;
}

@keyframes goalShine {
    0% {
        left: -100%;
    }
    100% {
        left: 150%;
    }
}

.timeline-goal strong {
    color: var(--primary-color);
}

.milestones h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-dark);
}

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

.milestone-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
    transition: box-shadow 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

.milestone-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(79, 70, 229, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.milestone-card:hover::before {
    width: 300px;
    height: 300px;
}

.milestone-card:hover {
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.milestone-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
    display: inline-block;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 8px 16px rgba(245, 158, 11, 0.4));
    animation: milestoneFloat 5s ease-in-out infinite;
}

.milestone-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, transparent 60%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: -1;
    animation: milestoneGlow 2.5s ease-in-out infinite;
}

.milestone-card:hover .milestone-icon {
    transform: rotateY(720deg) scale(1.5) translateZ(30px);
    color: var(--primary-color);
    filter: drop-shadow(0 15px 30px rgba(79, 70, 229, 0.6));
    animation: none;
}

@keyframes milestoneFloat {
    0%, 100% {
        transform: translateY(0) rotateZ(0deg) scale(1);
    }
    33% {
        transform: translateY(-12px) rotateZ(5deg) scale(1.05);
    }
    66% {
        transform: translateY(-6px) rotateZ(-5deg) scale(0.95);
    }
}

@keyframes milestoneGlow {
    0%, 100% {
        opacity: 0.4;
        transform: translate(-50%, -50%) scale(1) rotate(0deg);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.5) rotate(360deg);
    }
}

.milestone-card h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.milestone-card p {
    color: var(--text-light);
}

/* Footer */
footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--tibetan-gold);
}

.footer-section p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.7;
}

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

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Scroll Animation Classes */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.slide-in-left {
    opacity: 0;
    animation: slideInLeft 0.8s ease forwards;
}

.slide-in-right {
    opacity: 0;
    animation: slideInRight 0.8s ease forwards;
}

.scale-in {
    opacity: 0;
    animation: scaleIn 0.8s ease forwards;
}

/* Loading Animation */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #c41e3a; /* 藏族传统红色 */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
    overflow: hidden;
}

.page-loader::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 40%, rgba(212, 175, 55, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: loaderFloat 8s ease-in-out infinite;
}

@keyframes loaderFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    50% {
        transform: translate(30px, 30px) rotate(180deg);
    }
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
    color: white;
    position: relative;
    z-index: 1;
}

.loader-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-10px) scale(1.05);
    }
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: #d4af37;
    border-right-color: #10b981;
    border-bottom-color: white;
    border-left-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.5);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    html {
        /* 移动端使用proximity模式，体验更自然 */
        scroll-snap-type: y proximity;
    }
    
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .overview-grid,
    .application-grid,
    .stations-grid,
    .investment-details,
    .operations-grid,
    .constraints-grid {
        grid-template-columns: 1fr;
    }
    
    .scenery-card.large {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .scenery-grid {
        grid-template-columns: 1fr;
    }
    
    .background-images,
    .background-content {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        flex-direction: column;
    }
}