/* ========================================
   飞橙网络企业网站 - 主样式表
   ======================================== */

/* CSS 变量 */
:root {
    --primary: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8C5A;
    --secondary: #2D3142;
    --accent: #4ECDC4;
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A5A;
    --text-muted: #8A8A9A;
    --border: #E8E8EC;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.logo {
    width: 36px;
    height: 36px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a {
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: rgba(255, 107, 53, 0.08);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.45);
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

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

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

/* ========================================
   首页 Hero 区域
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, rgba(78, 205, 196, 0.05) 100%);
    border-radius: 50%;
    z-index: -1;
}

.hero .container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 80px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 0 1 500px;
}

.hero-image {
    flex: 0 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 480px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* 手机模型 */
.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    margin: 0 auto;
    background: var(--secondary);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.1);
}

.phone-mockup-large {
    width: 320px;
    height: 640px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--background);
    border-radius: 32px;
    overflow: hidden;
}

.app-preview {
    padding: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.preview-calories {
    font-weight: 600;
    color: var(--primary);
}

.progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 4px;
    transition: width 1s ease;
}

.preview-meals {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.meal-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: white;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

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

.meal-name {
    flex: 1;
    font-weight: 500;
}

.meal-cal {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   功能特色
   ======================================== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.features {
    padding: 100px 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 40px 24px;
    background: var(--background);
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius);
    color: white;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   数据统计
   ======================================== */
.stats {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-light);
}

.stat-label {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
    margin-top: 8px;
}

/* ========================================
   下载区域
   ======================================== */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05) 0%, rgba(78, 205, 196, 0.05) 100%);
}

.download-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.download-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 32px;
    background: var(--secondary);
    color: white;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--text-primary);
    transform: translateY(-2px);
}

.download-btn svg {
    width: 32px;
    height: 32px;
}

.download-btn span {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.download-btn small {
    font-size: 0.75rem;
    opacity: 0.8;
}

.download-btn strong {
    font-size: 1.125rem;
    font-weight: 600;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 80px 0 0;
    background: var(--secondary);
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand span {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    color: rgba(255,255,255,0.4);
    font-size: 0.875rem;
}

/* ========================================
   产品页面样式
   ======================================== */
.product-hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05) 0%, rgba(78, 205, 196, 0.05) 100%);
}

.product-hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.product-badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 20px;
}

.product-title {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.product-tagline {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.product-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.product-meta {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.meta-item svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

.product-buttons {
    display: flex;
    gap: 16px;
}

/* 产品功能展示 */
.product-features {
    padding: 100px 0;
    background: white;
}

.feature-showcase {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

.showcase-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.showcase-reverse {
    direction: rtl;
}

.showcase-reverse > * {
    direction: ltr;
}

.showcase-icon {
    width: 72px;
    height: 72px;
    padding: 18px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius);
    color: white;
    margin-bottom: 24px;
}

.showcase-icon svg {
    width: 100%;
    height: 100%;
}

.showcase-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.showcase-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '';
    width: 20px;
    height: 20px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234ECDC4' stroke-width='2'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E") center/contain no-repeat;
}

/* 功能演示 */
.feature-demo {
    background: var(--background);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.demo-screen {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

/* 相机演示 */
.camera-frame {
    text-align: center;
}

.camera-view {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    background: var(--background);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.food-emoji {
    font-size: 5rem;
}

.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation: scan 2s ease-in-out infinite;
}

@keyframes scan {
    0%, 100% { top: 0; }
    50% { top: 100%; }
}

.recognition-result {
    padding: 16px;
    background: var(--background);
    border-radius: var(--radius-sm);
}

.result-name {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
}

.result-cal {
    color: var(--primary);
    font-weight: 500;
}

/* 语音演示 */
.voice-interface {
    text-align: center;
}

.voice-wave {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 60px;
    margin-bottom: 20px;
}

.voice-wave span {
    width: 4px;
    background: var(--primary);
    border-radius: 2px;
    animation: wave 1s ease-in-out infinite;
}

.voice-wave span:nth-child(1) { height: 20%; animation-delay: 0s; }
.voice-wave span:nth-child(2) { height: 40%; animation-delay: 0.1s; }
.voice-wave span:nth-child(3) { height: 60%; animation-delay: 0.2s; }
.voice-wave span:nth-child(4) { height: 40%; animation-delay: 0.3s; }
.voice-wave span:nth-child(5) { height: 20%; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); }
    50% { transform: scaleY(1); }
}

.voice-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-style: italic;
}

.voice-result {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.recognized-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--background);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

/* 图表演示 */
.chart-demo {
    text-align: center;
}

.chart-header {
    font-weight: 600;
    margin-bottom: 20px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 12px;
    height: 150px;
    margin-bottom: 16px;
}

.chart-bar {
    width: 24px;
    background: var(--border);
    border-radius: 4px 4px 0 0;
    position: relative;
    transition: var(--transition);
}

.chart-bar.active {
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
}

.chart-bar span {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.chart-target {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 使用步骤 */
.how-it-works {
    padding: 100px 0;
    background: var(--background);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
}

.step-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    padding: 24px;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--primary);
}

.step-icon svg {
    width: 100%;
    height: 100%;
}

.step h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.step p {
    color: var(--text-secondary);
}

/* 用户评价 */
.testimonials {
    padding: 100px 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    padding: 32px;
    background: var(--background);
    border-radius: var(--radius);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.testimonial-rating {
    color: #FFB800;
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
}

.author-title {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   关于页面样式
   ======================================== */
.about-hero {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 100%);
    color: white;
    text-align: center;
}

.about-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.about-tagline {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.7);
}

.company-intro {
    padding: 100px 0;
    background: white;
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.intro-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.intro-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-visual {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
}

.visual-circle {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(78, 205, 196, 0.1) 100%);
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

.visual-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
}

.mission-vision {
    padding: 100px 0;
    background: var(--background);
}

.mv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.mv-card {
    padding: 40px 32px;
    background: white;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

.mv-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.mv-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius);
    color: white;
}

.mv-icon svg {
    width: 100%;
    height: 100%;
}

.mv-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.mv-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.team {
    padding: 100px 0;
    background: white;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.team-member {
    text-align: center;
    padding: 32px 24px;
    background: var(--background);
    border-radius: var(--radius);
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.member-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
}

.team-member h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.member-role {
    display: block;
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.team-member p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline {
    padding: 100px 0;
    background: var(--background);
}

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

.timeline-list::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.timeline-date {
    width: 100px;
    text-align: right;
    font-weight: 600;
    color: var(--primary);
    flex-shrink: 0;
}

.timeline-content {
    flex: 1;
    padding-left: 40px;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--text-secondary);
}

/* ========================================
   联系页面样式
   ======================================== */
.contact-hero {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 100%);
    color: white;
    text-align: center;
}

.contact-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-tagline {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.7);
}

.contact-info {
    padding: 80px 0;
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.contact-card {
    text-align: center;
    padding: 40px 32px;
    background: var(--background);
    border-radius: var(--radius);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius);
    color: white;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.contact-form-section {
    padding: 100px 0;
    background: var(--background);
}

.form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: white;
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.form-header {
    text-align: center;
    margin-bottom: 40px;
}

.form-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.form-header p {
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

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

.social-section {
    padding: 100px 0;
    background: white;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px 48px;
    background: var(--background);
    border-radius: var(--radius);
    transition: var(--transition);
}

.social-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    background: var(--primary);
    color: white;
}

.social-link svg {
    width: 40px;
    height: 40px;
}

.social-link span {
    font-weight: 500;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .features-grid,
    .stats-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero .container {
        flex-direction: column;
    }

    .product-hero .container,
    .intro-content {
        grid-template-columns: 1fr;
    }

    .hero-content,
    .product-hero-content {
        order: 1;
    }

    .hero-image,
    .product-hero-image {
        order: 0;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons,
    .product-buttons {
        justify-content: center;
    }
    
    .showcase-item {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .showcase-reverse {
        direction: ltr;
    }
    
    .showcase-content {
        text-align: center;
    }
    
    .showcase-icon {
        margin-left: auto;
        margin-right: auto;
    }
    
    .feature-list {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        width: 100%;
        text-align: center;
    }
    
    .hero-title,
    .product-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle,
    .product-tagline {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .stats-grid,
    .team-grid,
    .testimonials-grid,
    .mv-grid,
    .contact-grid,
    .steps {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .product-meta {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero-buttons,
    .product-buttons {
        flex-direction: column;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .timeline-list::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: 8px;
    }
    
    .timeline-date {
        text-align: left;
        padding-left: 48px;
    }
    
    .timeline-content {
        padding-left: 48px;
    }
    
    .timeline-content::before {
        left: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .form-wrapper {
        padding: 32px 24px;
    }
}