/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Linear风格主色调 */
    --primary-color: #5e6ad2;
    --primary-dark: #4c5bd4;
    --primary-light: #8b95ed;
    --secondary-color: #00d4aa;
    --accent-color: #ff6154;
    
    /* Linear风格中性色 */
    --dark-color: #0d0e11;
    --light-color: #ffffff;
    --gray-50: #fafbfc;
    --gray-100: #f2f4f7;
    --gray-200: #e4e7ec;
    --gray-300: #d0d5dd;
    --gray-400: #98a2b3;
    --gray-500: #667085;
    --gray-600: #475467;
    --gray-700: #344054;
    --gray-800: #1d2939;
    --gray-900: #101828;
    
    /* Linear风格渐变 */
    --gradient-primary: linear-gradient(135deg, #5e6ad2 0%, #8b95ed 100%);
    --gradient-hero: linear-gradient(135deg, #0d0e11 0%, #1d2939 50%, #344054 100%);
    --gradient-accent: linear-gradient(135deg, #00d4aa 0%, #5e6ad2 100%);
    
    /* Linear风格字体 */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Linear风格阴影 */
    --shadow-xs: 0 1px 2px rgba(16, 24, 40, 0.05);
    --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.1), 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 8px -2px rgba(16, 24, 40, 0.1), 0 2px 4px -2px rgba(16, 24, 40, 0.06);
    --shadow-lg: 0 12px 16px -4px rgba(16, 24, 40, 0.08), 0 4px 6px -2px rgba(16, 24, 40, 0.03);
    --shadow-xl: 0 20px 24px -4px rgba(16, 24, 40, 0.08), 0 8px 8px -4px rgba(16, 24, 40, 0.03);
    
    /* Linear风格边框 */
    --border-radius-xs: 2px;
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;
    --border-radius-2xl: 16px;
    --border-radius-3xl: 24px;
    
    /* Linear风格动画 */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--dark-color);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Linear风格导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition-medium);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    text-decoration: none;
}

.nav-logo i {
    margin-right: 0.5rem;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.nav-logo-image {
    height: 40px;
    width: auto;
    margin-right: 0.5rem;
    border-radius: 8px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 0.5rem;
}

.nav-item {
    margin: 0;
}

.nav-link {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--gray-900);
    background-color: var(--gray-50);
}

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

.btn-login {
    background: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    border: none;
    color: var(--light-color);
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-xs);
}

.btn-login:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 1px;
}

/* Linear风格主页横幅 - 美观背景 */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 119, 198, 0.2) 0%, transparent 50%);
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* 浮动粒子效果 */
.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.4), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 160px 30px, rgba(255, 255, 255, 0.2), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: sparkle 20s linear infinite;
    opacity: 0.6;
}

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

/* 美观的云朵动画 */
.clouds {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.clouds::before,
.clouds::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    animation: float 20s infinite linear;
}

.clouds::before {
    width: 100px;
    height: 40px;
    top: 20%;
    left: -100px;
    animation-delay: 0s;
    box-shadow: 
        120px 0 0 -10px rgba(255, 255, 255, 0.08),
        240px 20px 0 -20px rgba(255, 255, 255, 0.06);
}

.clouds::after {
    width: 80px;
    height: 30px;
    top: 60%;
    left: -80px;
    animation-delay: -10s;
    box-shadow: 
        100px -10px 0 -5px rgba(255, 255, 255, 0.07),
        200px 10px 0 -15px rgba(255, 255, 255, 0.05);
}

@keyframes float {
    0% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(25vw) translateY(-10px);
    }
    50% {
        transform: translateX(50vw) translateY(5px);
    }
    75% {
        transform: translateX(75vw) translateY(-5px);
    }
    100% {
        transform: translateX(100vw) translateY(0);
    }
}

.clouds {
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><defs><path id="cloud" d="M20,10 Q15,5 10,10 Q5,5 0,10 Q5,15 10,10 Q15,15 20,10 Z" fill="rgba(255,255,255,0.1)"/></defs><use href="%23cloud" x="0" y="0"/><use href="%23cloud" x="30" y="5"/><use href="%23cloud" x="60" y="2"/><use href="%23cloud" x="80" y="8"/></svg>') repeat-x;
    animation: float-clouds 20s linear infinite;
}

@keyframes float-clouds {
    0% { 
        transform: translateX(-100px);
        opacity: 0;
    }
    100% { 
        transform: translateX(100vw);
        opacity: 1;
    }
}

@keyframes trail {
    0%, 5% {
        opacity: 0;
        width: 0;
    }
    15% {
        opacity: 0.6;
        width: 60px;
    }
    85% {
        opacity: 0.4;
        width: 40px;
    }
    95%, 100% {
        opacity: 0;
        width: 0;
    }
}

/* 灵动的飞机动画 */
.airplane-animation {
    position: absolute;
    top: 25%;
    right: -150px;
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.4);
    animation: fly-advanced 25s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    z-index: 1;
}

.airplane-animation::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -20px;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: translateY(-50%);
    animation: trail 25s ease-in-out infinite;
}

@keyframes fly-advanced {
    0% {
        transform: translateX(0) translateY(0) rotate(0deg) scale(1);
        right: -150px;
        opacity: 0;
    }
    5% {
        opacity: 1;
    }
    15% {
        transform: translateX(-20vw) translateY(-30px) rotate(-8deg) scale(1.1);
    }
    35% {
        transform: translateX(-40vw) translateY(20px) rotate(3deg) scale(1);
    }
    55% {
        transform: translateX(-60vw) translateY(-15px) rotate(-5deg) scale(1.05);
    }
    75% {
        transform: translateX(-80vw) translateY(10px) rotate(2deg) scale(1);
    }
    95% {
        opacity: 1;
    }
    100% {
        transform: translateX(-100vw) translateY(0) rotate(0deg) scale(0.9);
        opacity: 0;
    }
}

.hero-content {
    text-align: center;
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.hero-title {
    margin-bottom: 2rem;
}

.title-main {
    display: block;
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--light-color);
    margin-bottom: 0.5rem;
    animation: fadeInUp 1s ease, pulse 4s ease-in-out infinite 2s;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.title-sub {
    display: block;
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    animation: fadeInUp 1s ease 0.3s both;
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 3rem;
    line-height: 1.7;
    animation: fadeInUp 1s ease 0.6s both;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.9s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.btn i {
    margin-right: 0.5rem;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--light-color);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--light-color);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-xs);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--light-color);
    box-shadow: var(--shadow-sm);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    color: var(--gray-400);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

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

/* 增强的动画效果 */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 255, 255, 0.2);
    }
    50% {
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.4), 0 0 30px rgba(255, 255, 255, 0.2);
    }
}

/* 为按钮添加悬停时的发光效果 */
.hero .btn-primary:hover {
    animation: glow 2s ease-in-out infinite;
}

/* 鼠标悬停动画效果 */
.hover-reveal {
    position: relative;
    cursor: pointer;
    transition: var(--transition-medium);
}

.hover-reveal::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0.8);
    transition: var(--transition-medium);
    pointer-events: none;
    z-index: -1;
}

.hover-reveal:hover::before {
    opacity: 1;
    transform: scale(1);
}

.hover-reveal:hover {
    transform: translateY(-2px);
}

/* 点击显示特殊字样的容器 */
.brand-reveal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.95), rgba(118, 75, 162, 0.95));
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-3xl);
    padding: 3rem 4rem;
    text-align: center;
    z-index: 10000;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.brand-reveal.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.brand-reveal h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--light-color);
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    animation: glow-text 2s ease-in-out infinite alternate;
}

.brand-reveal .chinese-name {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
}

.brand-reveal .close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    color: var(--light-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.brand-reveal .close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

@keyframes glow-text {
    0% {
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 10px rgba(255, 255, 255, 0.2);
    }
    100% {
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 255, 255, 0.4), 0 0 30px rgba(255, 255, 255, 0.2);
    }
}

/* 鼠标跟随效果 */
.mouse-follower {
    position: fixed;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.2) 50%, transparent 100%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease;
    opacity: 0;
}

.mouse-follower.active {
    opacity: 1;
}

/* 悬停时的特殊效果 */
.interactive-element {
    position: relative;
    transition: var(--transition-medium);
}

.interactive-element::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    opacity: 0;
    transform: translateX(-100%);
    transition: var(--transition-medium);
}

.interactive-element:hover::after {
    opacity: 1;
    transform: translateX(100%);
}

/* 点击波纹效果 */
.ripple-effect {
    position: relative;
    overflow: hidden;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* 点击反馈动画 */
@keyframes clickFeedbackAnimation {
    0% {
        transform: scale(0.5);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.6;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

.click-feedback {
    position: fixed;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
}

/* 背景文字显示效果 */
.background-text {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 800;
    color: rgba(94, 106, 210, 0.1);
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    transition: all 0.5s ease;
    text-align: center;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.background-text.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.background-text.fade-out {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
}

@keyframes textPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.15);
    }
}

/* 真实飞机起飞动画转场效果 */
.takeoff-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #87CEEB 0%, #E0F6FF 30%, #98FB98 100%);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.8s ease;
    overflow: hidden;
}

.takeoff-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 跑道 */
.runway {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 200px;
    background: linear-gradient(180deg, #666 0%, #444 100%);
    perspective: 1000px;
}

.runway::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 4px;
    background: repeating-linear-gradient(
        90deg,
        #fff 0px,
        #fff 40px,
        transparent 40px,
        transparent 80px
    );
    transform: translateY(-50%);
    animation: runwayMove 2s linear infinite;
}

.runway::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        0deg,
        rgba(0,0,0,0.3) 0%,
        transparent 100%
    );
}

/* 飞机 */
.takeoff-plane {
    position: absolute;
    bottom: 100px;
    left: -200px;
    font-size: 3rem;
    color: #fff;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
    animation: realisticTakeoff 6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    z-index: 10;
}

/* 飞机阴影 */
.plane-shadow {
    position: absolute;
    bottom: 80px;
    left: -200px;
    font-size: 3rem;
    color: rgba(0,0,0,0.3);
    filter: blur(4px);
    animation: shadowMove 6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    z-index: 1;
}

/* 云朵层 */
.sky-clouds {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.cloud {
    position: absolute;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50px;
    opacity: 0;
}

.cloud1 {
    width: 100px;
    height: 40px;
    top: 20%;
    left: 20%;
    animation: cloudFloat1 8s ease-in-out infinite, cloudFadeIn 1s ease 2s forwards;
}

.cloud2 {
    width: 80px;
    height: 30px;
    top: 35%;
    right: 30%;
    animation: cloudFloat2 10s ease-in-out infinite, cloudFadeIn 1s ease 2.5s forwards;
}

.cloud3 {
    width: 120px;
    height: 45px;
    top: 15%;
    right: 10%;
    animation: cloudFloat3 12s ease-in-out infinite, cloudFadeIn 1s ease 3s forwards;
}

/* 地面细节 */
.ground-details {
    position: absolute;
    bottom: 200px;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(180deg, #90EE90 0%, #228B22 100%);
}

.ground-details::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 20px;
    background: repeating-linear-gradient(
        90deg,
        #228B22 0px,
        #228B22 10px,
        #32CD32 10px,
        #32CD32 20px
    );
    animation: groundMove 3s linear infinite;
}

/* 起飞文字 */
.takeoff-text {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #333;
    font-family: var(--font-heading);
    opacity: 0;
    animation: textSlideUp 1s ease 4s forwards;
}

.takeoff-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.takeoff-text p {
    font-size: 1rem;
    color: #7f8c8d;
}

.popup-warning {
    margin-top: 1rem;
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.85);
    color: #c0392b;
    border-radius: 6px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(6px);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    animation: warningFade 0.8s ease 3.5s forwards;
    opacity: 0;
}

.popup-warning::before {
    content: "\f071";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
}

@keyframes warningFade {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 动画定义 */
@keyframes realisticTakeoff {
    0% {
        left: -200px;
        bottom: 100px;
        transform: rotate(0deg) scale(1);
    }
    25% {
        left: 20%;
        bottom: 100px;
        transform: rotate(0deg) scale(1);
    }
    40% {
        left: 40%;
        bottom: 105px;
        transform: rotate(-2deg) scale(1.1);
    }
    60% {
        left: 60%;
        bottom: 150px;
        transform: rotate(-8deg) scale(1.2);
    }
    80% {
        left: 80%;
        bottom: 300px;
        transform: rotate(-15deg) scale(1.4);
    }
    100% {
        left: 120%;
        bottom: 600px;
        transform: rotate(-20deg) scale(1.8);
    }
}

@keyframes shadowMove {
    0% {
        left: -200px;
        bottom: 80px;
        transform: scale(1);
        opacity: 0.3;
    }
    25% {
        left: 20%;
        bottom: 80px;
        transform: scale(1);
        opacity: 0.3;
    }
    60% {
        left: 60%;
        bottom: 75px;
        transform: scale(1.2);
        opacity: 0.2;
    }
    80% {
        left: 80%;
        bottom: 70px;
        transform: scale(1.4);
        opacity: 0.1;
    }
    100% {
        left: 120%;
        bottom: 60px;
        transform: scale(1.8);
        opacity: 0;
    }
}

@keyframes runwayMove {
    0% {
        transform: translateY(-50%) translateX(0);
    }
    100% {
        transform: translateY(-50%) translateX(-80px);
    }
}

@keyframes groundMove {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-20px);
    }
}

@keyframes cloudFloat1 {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    50% {
        transform: translateX(20px) translateY(-10px);
    }
}

@keyframes cloudFloat2 {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    50% {
        transform: translateX(-15px) translateY(8px);
    }
}

@keyframes cloudFloat3 {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    50% {
        transform: translateX(10px) translateY(-5px);
    }
}

@keyframes cloudFadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 0.8;
    }
}

@keyframes textSlideUp {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) translateY(0);
    }
}

.loading-spinner {
    position: absolute;
    bottom: 15%;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    border: 2px solid rgba(44, 62, 80, 0.3);
    border-top: 2px solid #2c3e50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    opacity: 0;
    animation-delay: 4.5s;
    animation-fill-mode: forwards;
}

@keyframes spin {
    0% { 
        transform: translateX(-50%) rotate(0deg);
        opacity: 1;
    }
    100% { 
        transform: translateX(-50%) rotate(360deg);
        opacity: 1;
    }
}

/* Linear风格通用区块样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Linear风格特色功能区块 */
.features {
    padding: 6rem 0;
    background: var(--light-color);
}

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

.feature-card {
    background: var(--light-color);
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
    border: 1px solid var(--gray-200);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-color);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    color: var(--light-color);
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.875rem;
}

/* Linear风格服务项目区块 */
.services {
    padding: 6rem 0;
    background: var(--gray-50);
}

.service-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: var(--light-color);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-lg);
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-xs);
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--light-color);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.service-info h3 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 2rem;
}

.service-info ul {
    list-style: none;
    margin-bottom: 2rem;
}

.service-info li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

.service-info li i {
    color: var(--primary-color);
    margin-right: 1rem;
    font-size: 1.1rem;
}

.service-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 300px;
    height: 200px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--light-color);
    box-shadow: var(--shadow-medium);
}

/* Linear风格统计数据区块 */
.stats {
    padding: 4rem 0;
    background: var(--light-color);
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem 1rem;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Linear风格关于我们区块 */
.about {
    padding: 6rem 0;
    background: var(--gray-50);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    font-size: 1.1rem;
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.about-feature {
    display: flex;
    align-items: center;
    color: var(--gray-dark);
    font-weight: 500;
}

.about-feature i {
    color: var(--primary-color);
    margin-right: 1rem;
    font-size: 1.2rem;
}

/* 联系我们区块 */
.contact {
    padding: 6rem 0;
    background: var(--light-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-color);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--gray-medium);
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
/* Linear风格表单样式 */
.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-lg);
    background: var(--light-color);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    font-family: var(--font-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(94, 106, 210, 0.1);
}

.form-group label {
    position: absolute;
    top: 0.75rem;
    left: 1rem;
    color: var(--gray-500);
    transition: var(--transition-fast);
    pointer-events: none;
    font-size: 0.875rem;
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.75rem;
    color: var(--primary-color);
    background: var(--light-color);
    padding: 0 0.25rem;
}

/* Linear风格页脚 */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 3rem 0 1rem;
    border-top: 1px solid var(--gray-800);
}

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

.footer-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--light-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--light-color);
}

.footer-logo i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.footer-description {
    color: var(--gray-400);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: var(--gray-800);
    border: 1px solid var(--gray-700);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--light-color);
    transform: translateY(-1px);
}

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

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

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.875rem;
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 1rem;
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.footer-bottom a {
    color: var(--gray-400);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--light-color);
}

/* Linear风格返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius-xl);
    color: var(--light-color);
    font-size: 1rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        width: 100%;
        text-align: center;
        transition: var(--transition-fast);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        border-top: 1px solid var(--gray-200);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 1rem 0;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .service-detail {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .service-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .title-main {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* 动画增强 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-medium);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Linear风格加载动画 */
.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--gray-300);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

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

/* Linear风格通知组件 */
.notification {
    position: fixed;
    top: 1rem;
    right: 1rem;
    max-width: 400px;
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    transform: translateX(100%);
    transition: var(--transition-medium);
    border: 1px solid;
    backdrop-filter: blur(8px);
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    background: rgba(34, 197, 94, 0.95);
    border-color: rgb(34, 197, 94);
    color: white;
}

.notification-error {
    background: rgba(239, 68, 68, 0.95);
    border-color: rgb(239, 68, 68);
    color: white;
}

.notification-info {
    background: rgba(59, 130, 246, 0.95);
    border-color: rgb(59, 130, 246);
    color: white;
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.notification-content i {
    font-size: 1.125rem;
    flex-shrink: 0;
}

.notification-content span {
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
}

/* Linear风格页面标题 */
.page-hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.page-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--gray-900);
    letter-spacing: -0.025em;
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* 公司介绍样式 */
.company-intro {
    padding: 6rem 0;
    background: var(--light-color);
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2rem;
    letter-spacing: -0.025em;
}

.intro-text p {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

/* Linear风格时间线 */
.timeline {
    padding: 6rem 0;
    background: var(--gray-50);
}

.timeline-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--gray-300);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-date {
    background: var(--primary-color);
    color: var(--light-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-sm);
}

.timeline-content {
    flex: 1;
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    margin: 0 2rem;
}

.timeline-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.875rem;
}

/* 团队样式 */
.team {
    padding: 6rem 0;
    background: var(--light-color);
}

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

.team-member {
    text-align: center;
    background: var(--light-color);
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    transition: var(--transition-medium);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-xs);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.member-photo {
    width: 96px;
    height: 96px;
    background: var(--primary-color);
    border-radius: var(--border-radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2.5rem;
    color: var(--light-color);
}

.team-member h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.member-role {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.member-bio {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.875rem;
}

/* Linear风格企业价值观 */
.values {
    padding: 6rem 0;
    background: var(--light-color);
}

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

.value-item {
    text-align: center;
    background: var(--light-color);
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition-medium);
}

.value-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.value-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-color);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    color: var(--light-color);
}

.value-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.value-item p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.875rem;
}

/* Linear风格服务详情页面 */
.services-detail {
    padding: 4rem 0;
    background: var(--gray-50);
}

.service-section {
    margin-bottom: 4rem;
    background: var(--light-color);
    border-radius: var(--border-radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.service-header {
    background: var(--primary-color);
    color: var(--light-color);
    padding: 2.5rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.service-header .service-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.service-title h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.service-title p {
    font-size: 1rem;
    opacity: 0.9;
}

.service-content {
    padding: 2.5rem;
}

/* 培训功能网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: var(--gray-light);
    border-radius: 15px;
    transition: var(--transition-medium);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.feature-item p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.875rem;
}

/* Linear风格价格表 */
.pricing-table {
    margin-top: 4rem;
}

.pricing-table h3 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 3rem;
    letter-spacing: -0.025em;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.pricing-card {
    background: var(--light-color);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    text-align: center;
    position: relative;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-xs);
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    border-width: 2px;
    box-shadow: var(--shadow-md);
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--light-color);
    padding: 0.5rem 2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-card h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-card li {
    padding: 0.5rem 0;
    color: var(--gray-dark);
    border-bottom: 1px solid #f0f0f0;
}

/* 模拟器功能展示 */
.simulator-features {
    margin-top: 2rem;
}

.feature-showcase {
    display: grid;
    gap: 2rem;
}

.showcase-item {
    background: var(--gray-light);
    padding: 2.5rem;
    border-radius: 15px;
    border-left: 4px solid var(--primary-color);
}

.showcase-item h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.showcase-item p {
    color: var(--gray-dark);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-stats {
    display: flex;
    gap: 2rem;
}

.feature-stats span {
    display: flex;
    align-items: center;
    color: var(--primary-color);
    font-weight: 500;
}

.feature-stats i {
    margin-right: 0.5rem;
}

/* 竞赛样式 */
.competition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.competition-card {
    background: var(--gray-light);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition-medium);
}

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

.competition-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.competition-card p {
    color: var(--gray-medium);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.competition-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
}

.competition-info span {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* 企业服务样式 */
.enterprise-services {
    margin-top: 2rem;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.service-item {
    display: flex;
    gap: 2rem;
    background: var(--gray-light);
    padding: 2.5rem;
    border-radius: 15px;
}

.service-icon-small {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--light-color);
    flex-shrink: 0;
}

.service-details h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.service-details p {
    color: var(--gray-dark);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.service-details ul {
    list-style: none;
}

.service-details li {
    color: var(--gray-medium);
    padding: 0.3rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.service-details li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* 咨询区块 */
.consultation {
    padding: 4rem 0;
    background: var(--gradient-primary);
    color: var(--light-color);
    text-align: center;
}

.consultation-content h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.consultation-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.consultation-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 响应式设计补充 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .timeline-container::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: 50px;
    }
    
    .timeline-date {
        position: absolute;
        left: 0;
        width: 40px;
        height: 40px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.8rem;
    }
    
    .timeline-content {
        margin: 0;
        margin-left: 20px;
    }
    
    .service-header {
        flex-direction: column;
        text-align: center;
    }
    
    .service-header .service-icon {
        margin-bottom: 1rem;
    }
    
    .service-title h2 {
        font-size: 2rem;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .feature-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .service-item {
        flex-direction: column;
        text-align: center;
    }
    
    .consultation-buttons {
        flex-direction: column;
        align-items: center;
    }
}