/* =====================
   路宝推广网站 - 样式表
   ===================== */

/* CSS变量 */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --success: #10b981;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
    --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* =====================
   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(10px);
    box-shadow: none;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}

.logo-icon {
    font-size: 1.8rem;
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray);
    position: relative;
    padding: 8px 0;
}

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

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

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

.nav-cta {
    background: var(--gradient);
    color: var(--white) !important;
    padding: 10px 24px !important;
    border-radius: var(--radius);
}

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

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
}

/* =====================
   Hero 区域
   ===================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0.8;
    }
}

.hero-content {
    text-align: center;
    color: var(--white);
    z-index: 2;
    padding: 20px;
}

.hero-title {
    margin-bottom: 24px;
}

.hero-greeting {
    display: block;
    font-size: 1.25rem;
    font-weight: 300;
    opacity: 0.8;
    animation: fadeInUp 0.8s ease;
}

.hero-name {
    display: block;
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, var(--primary-light) 50%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 16px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-desc {
    font-size: 1.1rem;
    opacity: 0.7;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 1s both;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 4px;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 10px;
    background: var(--white);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

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

@keyframes scroll {
    0% {
        opacity: 1;
        top: 8px;
    }
    100% {
        opacity: 0;
        top: 32px;
    }
}

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

/* =====================
   服务区域
   ===================== */
.services {
    padding: 100px 0;
    background: var(--light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 60px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--dark);
}

.service-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* =====================
   技术栈区域
   ===================== */
.tech {
    padding: 100px 0;
    background: var(--white);
}

.tech-categories {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.tech-category h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 24px;
    padding-left: 16px;
    border-left: 4px solid var(--primary);
}

.tech-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--light);
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: default;
    position: relative;
}

.tech-item:hover {
    background: var(--gradient);
    color: var(--white);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tech-item:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    white-space: nowrap;
    z-index: 10;
}

.tech-icon {
    font-size: 1.8rem;
}

.tech-item span {
    font-weight: 500;
}

/* =====================
   案例区域
   ===================== */
.cases {
    padding: 100px 0;
    background: var(--light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.case-card {
    cursor: pointer;
    position: relative;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.case-click-hint {
    text-align: center;
    padding: 12px;
    background: var(--gradient);
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 500;
    opacity: 0;
    transition: var(--transition);
}

.case-card:hover .case-click-hint {
    opacity: 1;
}

.case-image {
    height: 200px;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    font-size: 5rem;
    opacity: 0.8;
}

.case-content {
    padding: 30px;
}

.case-tag {
    display: inline-block;
    background: var(--gradient);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 16px;
}

.case-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--dark);
}

.case-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.case-tech {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.case-tech span {
    background: var(--light);
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* =====================
   案例详情模态框
   ===================== */
.case-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.case-modal.active {
    display: flex;
}

.case-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.case-modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-xl);
    max-width: 800px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 0;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.case-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--light);
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
    color: var(--gray);
}

.case-modal-close:hover {
    background: var(--primary);
    color: var(--white);
}

/* 模态框内部样式 */
.case-detail-header {
    background: var(--gradient-dark);
    padding: 40px 40px 30px;
    color: var(--white);
    position: relative;
}

.case-detail-header .case-tag {
    margin-bottom: 12px;
}

.case-detail-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.case-detail-header .case-subtitle {
    opacity: 0.8;
    font-size: 1rem;
}

.case-detail-body {
    padding: 30px 40px 40px;
}

.case-detail-section {
    margin-bottom: 28px;
}

.case-detail-section:last-child {
    margin-bottom: 0;
}

.case-detail-section h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
    padding-left: 12px;
    border-left: 3px solid var(--primary);
}

.case-detail-section p,
.case-detail-section li {
    color: var(--gray);
    line-height: 1.8;
    font-size: 0.95rem;
}

.case-detail-section ul {
    list-style: none;
    padding: 0;
}

.case-detail-section li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
}

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

.case-detail-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-top: 12px;
}

.case-stat-item {
    background: var(--light);
    padding: 16px;
    border-radius: var(--radius);
    text-align: center;
}

.case-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.case-stat-label {
    font-size: 0.85rem;
    color: var(--gray);
    margin-top: 4px;
}

.case-detail-tech-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.case-detail-tech-row span {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.case-detail-cta {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--light);
    text-align: center;
}

.case-detail-cta p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.case-detail-cta .btn {
    background: var(--gradient);
    color: var(--white);
    padding: 14px 36px;
    font-size: 1rem;
}

.case-detail-cta .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* 案例截图区域 */
.case-screenshots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.case-screenshot-item {
    aspect-ratio: 16/10;
    background: var(--gradient-dark);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    opacity: 0.7;
    transition: var(--transition);
}

.case-screenshot-item:hover {
    opacity: 1;
    transform: scale(1.03);
}

@media (max-width: 768px) {
    .case-modal-content {
        max-height: 90vh;
        border-radius: var(--radius-lg);
    }
    
    .case-detail-header {
        padding: 30px 24px 24px;
    }
    
    .case-detail-body {
        padding: 24px;
    }
    
    .case-detail-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-screenshots {
        grid-template-columns: 1fr;
    }
}

/* =====================
   联系区域
   ===================== */
.contact {
    padding: 100px 0;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow);
}

.contact-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: var(--radius);
}

.contact-detail h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-value {
    color: var(--primary);
    font-weight: 500;
    font-size: 1.1rem;
}

a.contact-value:hover {
    text-decoration: underline;
}

.contact-cta {
    position: sticky;
    top: 100px;
}

.cta-card {
    background: var(--gradient-dark);
    padding: 50px 40px;
    border-radius: var(--radius-xl);
    text-align: center;
    color: var(--white);
}

.cta-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.cta-card p {
    opacity: 0.8;
    margin-bottom: 30px;
}

.cta-card .btn-primary {
    background: var(--white);
    color: var(--primary);
}

.cta-card .btn-primary:hover {
    background: var(--light);
}

.btn-icon {
    font-size: 1.2rem;
}

.cta-note {
    font-size: 0.9rem;
    margin-top: 16px;
    opacity: 0.6;
}

/* =====================
   留言表单
   ===================== */
.contact-form {
    text-align: left;
    margin-top: 20px;
}

.contact-form .form-group {
    margin-bottom: 16px;
}

.contact-form .form-row {
    display: flex;
    gap: 16px;
}

.contact-form .form-row .form-group {
    flex: 1;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    box-sizing: border-box;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.15);
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form .btn {
    width: 100%;
    padding: 14px 24px;
    font-size: 1rem;
}

/* =====================
   页脚
   ===================== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand .logo-icon {
    font-size: 2rem;
}

.footer-brand .logo-text {
    font-size: 1.5rem;
}

.footer-brand p {
    opacity: 0.6;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    opacity: 0.7;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-light);
}

.footer-contact a {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    opacity: 0.5;
    font-size: 0.9rem;
}

/* =====================
   回到顶部按钮
   ===================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* =====================
   响应式设计
   ===================== */
@media (max-width: 992px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-cta {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-link {
        padding: 15px 0;
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--light);
    }
    
    .nav-cta {
        margin-top: 10px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        padding: 0 20px;
    }
    
    .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .tech-items {
        grid-template-columns: 1fr;
    }
    
    .case-card h3 {
        font-size: 1.1rem;
    }
    
    .cta-card {
        padding: 30px 20px;
    }
}

/* =====================
   动画效果
   ===================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}