/* 
 * 上技智造 - 蓝色白底科技风格
 * Blue & White Theme - 清新专业的工业科技风
 */

/* ===== CSS变量定义 ===== */
:root {
    /* 主色调 - 蓝色系 */
    --primary-blue: #1565C0;
    --primary-light: #42A5F5;
    --primary-dark: #0D47A1;
    --accent-cyan: #00BCD4;
    
    /* 背景色 */
    --bg-white: #ffffff;
    --bg-light: #f5f7fa;
    --bg-gray: #e8ecf1;
    --bg-dark-blue: #0a2540;
    
    /* 文字色 */
    --text-dark: #1a1a2e;
    --text-gray: #4a5568;
    --text-light: #718096;
    --text-white: #ffffff;
    
    /* 边框色 */
    --border-blue: #1565C0;
    --border-light: #e2e8f0;
    
    /* 阴影 */
    --shadow: 0 4px 20px rgba(21, 101, 192, 0.1);
    --shadow-hover: 0 8px 30px rgba(21, 101, 192, 0.2);
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.08);
    
    /* 过渡 */
    --transition: all 0.3s ease;
}

/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
    background-color: var(--bg-white);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== 容器 ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 20px rgba(21, 101, 192, 0.08);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--text-white);
    box-shadow: 0 4px 12px rgba(21, 101, 192, 0.3);
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-blue);
    letter-spacing: 1px;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--text-light);
    font-weight: 400;
    margin-left: 8px;
}

.nav-menu {
    display: flex;
    gap: 35px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
    padding: 8px 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-blue);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

.lang-btn,
.pdf-btn {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-gray);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
    margin-left: 10px;
}

.lang-btn:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    background: rgba(21, 101, 192, 0.05);
}

.pdf-btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    color: var(--text-white);
    border: none;
    font-weight: 600;
}

.pdf-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(21, 101, 192, 0.4);
}

/* ===== Hero区域 ===== */
.hero {
    margin-top: 70px;
    min-height: 85vh;
    background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 50%, #e8f4fd 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan), var(--primary-light));
}

.hero::after {
    content: '';
    position: absolute;
    right: -100px;
    top: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(21, 101, 192, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    position: relative;
    z-index: 1;
}

.hero-title-en {
    font-size: 56px;
    font-weight: 900;
    letter-spacing: 6px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    animation: fadeInDown 1s ease;
}

.hero-title-cn {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-tagline {
    font-size: 22px;
    color: var(--primary-blue);
    margin-bottom: 12px;
    font-weight: 600;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-description {
    font-size: 17px;
    color: var(--text-gray);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.6s both;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
    margin: 35px 0;
    animation: fadeInUp 1s ease 0.8s both;
}

.feature-tag {
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 15px;
    color: var(--text-gray);
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.feature-tag:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.hero-process {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin: 45px 0 35px;
    flex-wrap: wrap;
}

.process-step {
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    padding: 18px 28px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.process-step:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.process-icon {
    font-size: 28px;
    margin-bottom: 6px;
}

.process-title {
    font-size: 15px;
    color: var(--text-gray);
    font-weight: 500;
}

.process-arrow {
    font-size: 24px;
    color: var(--primary-light);
    font-weight: 300;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 1s both;
}

.btn-primary,
.btn-secondary {
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(21, 101, 192, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(21, 101, 192, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--text-white);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 四大核心服务板块 ===== */
.section {
    padding: 90px 0;
    background: var(--bg-white);
}

.section:nth-child(even) {
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-light);
    max-width: 700px;
    margin: 15px auto 0;
}

/* 服务模块卡片 */
.service-module {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 50px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.service-module:hover {
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}

.service-module-header {
    display: flex;
    align-items: center;
    margin-bottom: 35px;
    padding-bottom: 25px;
    border-bottom: 2px solid var(--bg-gray);
}

.service-number {
    font-size: 52px;
    font-weight: 900;
    color: var(--primary-blue);
    opacity: 0.15;
    margin-right: 25px;
    min-width: 70px;
    line-height: 1;
}

.service-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.service-title {
    font-size: 26px;
    color: var(--primary-blue);
    margin-bottom: 8px;
    font-weight: 700;
}

.service-process {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.process-step-card {
    background: var(--bg-light);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    padding: 25px 20px;
    text-align: center;
    transition: var(--transition);
}

.process-step-card:hover {
    border-color: var(--primary-blue);
    background: var(--bg-white);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.process-step-card .step-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.process-step-card h4 {
    color: var(--primary-blue);
    font-size: 17px;
    margin-bottom: 10px;
    font-weight: 600;
}

.process-step-card p {
    color: var(--text-light);
    font-size: 13px;
    line-height: 1.6;
}

/* ===== 云设计板块 ===== */
.cloud-design-section {
    background: linear-gradient(180deg, var(--bg-white) 0%, #f0f7ff 100%);
    padding: 100px 0;
}

.engineer-section {
    background: var(--bg-light);
}

.engineer-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.engineer-stat {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.engineer-stat:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.engineer-stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.engineer-stat-label {
    font-size: 15px;
    color: var(--text-light);
}

.engineer-modules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.engineer-module {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 30px 25px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.engineer-module:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.engineer-module-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.engineer-module-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.engineer-module-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

/* ===== 柔性制造 / 云制造 ===== */
.supply-chain-section {
    background: var(--bg-white);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-light);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.stat-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary-blue);
    display: block;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: var(--text-light);
}

.scm-modules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.scm-module {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.scm-module:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.module-header {
    background: linear-gradient(135deg, rgba(21, 101, 192, 0.08), rgba(66, 165, 245, 0.05));
    border-bottom: 1px solid var(--border-light);
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.module-icon {
    font-size: 32px;
}

.module-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 4px;
}

.module-title-en {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.module-content {
    padding: 25px 30px;
}

.module-features {
    list-style: none;
}

.module-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--bg-gray);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.module-features li:last-child {
    border-bottom: none;
}

.feature-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
}

.feature-name img {
    max-width: 100%;
    border-radius: 8px;
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 优质产品 / 云商城 ===== */
.product-showcase {
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
    padding: 100px 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

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

.product-video {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background: var(--bg-dark-blue);
}

.product-info {
    padding: 25px;
}

.product-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 质量检测 ===== */
.testing-section {
    background: var(--bg-white);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.partner-card {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 30px 25px;
    text-align: center;
    transition: var(--transition);
}

.partner-card:hover {
    border-color: var(--primary-blue);
    background: var(--bg-white);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.partner-card.highlight {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(21, 101, 192, 0.05), rgba(66, 165, 245, 0.03));
}

.partner-icon {
    font-size: 36px;
    margin-bottom: 15px;
}

.partner-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.partner-card.highlight .partner-name {
    color: var(--primary-blue);
}

.partner-desc {
    font-size: 13px;
    color: var(--text-light);
}

/* ===== 云资产平台 ===== */
.cloud-asset-section {
    background: linear-gradient(180deg, var(--bg-white) 0%, #f0f7ff 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    padding: 35px 28px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-8px);
    box-shadow: var(--shadow);
}

.advantage-icon {
    font-size: 44px;
    margin-bottom: 18px;
}

.advantage-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 12px;
}

.advantage-description {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 18px;
}

.advantage-features {
    margin-top: 0;
    text-align: left;
}

.advantage-features li {
    font-size: 13px;
    color: var(--text-gray);
    padding: 7px 0;
    padding-left: 18px;
    position: relative;
    border-bottom: 1px solid var(--bg-gray);
}

.advantage-features li:last-child {
    border-bottom: none;
}

.advantage-features li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: 600;
}

/* ===== 生态伙伴 ===== */
.ecosystem-section {
    background: var(--bg-light);
}

.ecosystem-category {
    margin-bottom: 50px;
}

.category-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-light);
}

/* ===== 联系我们 ===== */
.contact-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    padding: 80px 0;
}

.contact-section .section-title {
    color: var(--text-white);
}

.contact-section .section-title::after {
    background: linear-gradient(90deg, var(--text-white), rgba(255,255,255,0.5));
}

.contact-section .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.contact-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 35px 25px;
    text-align: center;
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 42px;
    margin-bottom: 18px;
}

.contact-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: 12px;
}

.contact-info {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark-blue);
    padding: 50px 0 25px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 35px;
    margin-bottom: 35px;
}

.footer-column h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-blue);
    display: inline-block;
}

.footer-column p,
.footer-column a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 35px;
    right: 35px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(21, 101, 192, 0.3);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(21, 101, 192, 0.4);
}

/* ===== 工业AI板块 ===== */
.industrial-ai-section {
    background: var(--bg-light);
    padding: 100px 0;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .container,
    .nav-container {
        padding: 0 20px;
    }
    
    .nav-container {
        padding: 12px 20px;
    }
    
    .hero-title-en {
        font-size: 36px;
        letter-spacing: 3px;
    }
    
    .hero-title-cn {
        font-size: 26px;
    }
    
    .hero-tagline {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .service-process {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid,
    .advantages-grid,
    .services-grid,
    .scm-modules,
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-process {
        flex-direction: column;
    }
    
    .process-arrow {
        transform: rotate(90deg);
    }
}

/* ===== 动画效果 ===== */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.animate-pulse {
    animation: pulse 2s infinite;
}