/* --- 全局变量与重置 --- */
:root {
    --primary-blue: #1e5fba; /* 提取自Logo深蓝 */
    --tech-cyan: #29b6f6;    /* 提取自Logo亮蓝 */
    --accent-green: #00a651; /* 提取自Logo绿点 */
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --text-dark: #334155;
    --text-light: #94a3b8;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

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

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

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

/* --- 按钮样式 --- */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--tech-cyan));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(30, 95, 186, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 95, 186, 0.4);
}

.btn-outline {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    margin-left: 15px;
}

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

.btn-sm {
    padding: 8px 20px;
    font-size: 0.9rem;
    background: var(--accent-green);
    color: white;
    border: none;
}

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 15px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    color: var(--primary-blue);
}

.logo img {
    height: 45px;
}

.logo span {
    line-height: 1.2;
    font-size: 1.1rem;
}

.logo small {
    font-size: 0.7rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

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

.nav-links a {
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: 0.3s;
}

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

.nav-links a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero 区域 --- */
.hero {
    padding-top: 140px;
    padding-bottom: 80px;
    background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(41,182,246,0.1) 0%, rgba(255,255,255,0) 70%);
    z-index: 0;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 50px;
    position: relative;
    z-index: 1;
}

.badge {
    background: rgba(30, 95, 186, 0.1);
    color: var(--primary-blue);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    display: inline-block;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.highlight {
    color: var(--primary-blue);
    position: relative;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 30px;
    max-width: 90%;
}

.hero-stats {
    margin-top: 40px;
    display: flex;
    gap: 40px;
    border-top: 1px solid #e2e8f0;
    padding-top: 20px;
}

.stat-item h3 {
    font-size: 2rem;
    color: var(--primary-blue);
    font-weight: 800;
}

.stat-item p {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--text-light);
}

.img-wrapper {
    position: relative;
}

.img-wrapper img {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transform: perspective(1000px) rotateY(-5deg);
    transition: 0.5s;
}

.img-wrapper:hover img {
    transform: perspective(1000px) rotateY(0deg);
}

/* 浮动卡片效果 */
.floating-card {
    position: absolute;
    background: white;
    padding: 15px 25px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: float 4s ease-in-out infinite;
}

.c1 { top: 20px; left: -30px; color: #ef4444; }
.c2 { bottom: 40px; right: -20px; color: var(--tech-cyan); animation-delay: 2s; }

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

/* --- 通用 Section --- */
section {
    padding: 80px 0;
}

.section-gray { background-color: var(--light-bg); }
.section-white { background-color: var(--white); }
.section-dark { background-color: var(--dark-bg); color: white; }

.section-header {
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    color: inherit;
}

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

/* --- 痛点 Grid --- */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.shadow-box {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    background: white;
    padding: 10px;
}

/* --- Performance List --- */
.comparison-wrapper {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
}

.comparison-content {
    max-width: 800px;
    width: 100%;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    width: 100%;
}

.feature-item {
    background: #fff;
    padding: 25px;
    border-radius: var(--radius);
    border: 1px solid #e2e8f0;
    transition: 0.3s;
}

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

.icon-box {
    width: 50px;
    height: 50px;
    background: rgba(30, 95, 186, 0.1);
    color: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.feature-item h4 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* --- Tab 切换 (Workflow) --- */
.tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.tab-btn {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    padding: 10px 25px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1rem;
    transition: 0.3s;
}

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

.tab-content {
    display: none;
    animation: fadeIn 0.5s;
}

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

.step-list {
    margin-top: 20px;
}

.step-list li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.step-list span {
    width: 30px;
    height: 30px;
    background: var(--tech-cyan);
    color: var(--dark-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 15px;
}

.rounded-img {
    border-radius: var(--radius);
}

.max-800 { max-width: 800px; margin: 0 auto; }
.mt-20 { margin-top: 20px; }
.text-white { color: white; }

/* --- Footer --- */
footer {
    background: #0b1120;
    color: #cbd5e1;
    padding: 60px 0 20px;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo img {
    height: 30px;
    margin-bottom: 15px;
}

.footer-logo h3 {
    color: white;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.footer-links h4, .footer-contact h4 {
    color: white;
    margin-bottom: 20px;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-contact p {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.85rem;
}

/* --- 动画 --- */
.fade-in-up { opacity: 0; transform: translateY(30px); transition: 0.8s ease-out; }
.fade-in-left { opacity: 0; transform: translateX(-30px); transition: 0.8s ease-out; }
.fade-in-right { opacity: 0; transform: translateX(30px); transition: 0.8s ease-out; }

.visible { opacity: 1; transform: translate(0); }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 响应式 --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero-container, .grid-2, .feature-list, .footer-container {
        grid-template-columns: 1fr;
    }
    .hero-container { gap: 30px; text-align: center; }
    .hero-btns { justify-content: center; }
    .hero-stats { justify-content: center; }
    .nav-links { display: none; } /* Mobile menu implementation needed if full functionality desired */
    .menu-toggle { display: block; }
    .floating-card { display: none; } /* Hide on mobile to save space */
}