/* ========== 全局重置与基础变量 ========== */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #60a5fa;
    --accent: #06b6d4;
    --success: #07c160;
    --warn: #f59e0b;
    --purple: #8b5cf6;
    --dark: #0f172a;
    --dark2: #1e293b;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --light: #f8fafc;
    --white: #ffffff;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--dark);
    background: var(--light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.section-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(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary);
}

.nav-logo svg {
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-links a {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--dark2);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--primary);
    color: #fff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

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

/* ========== Hero 轮播 ========== */
.hero {
    padding-top: 60px;
}

.carousel {
    position: relative;
    width: 100%;
    height: 45vw;
    max-height: 480px;
    min-height: 280px;
    overflow: hidden;
	
}

.carousel-track {
    height: 100%;
    position: relative;
	box-sizing: border-box;
}

.carousel-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.carousel-slide.active {
    opacity: 1;
}

.slide-content {
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.slide-content h2 {
    font-size: clamp(1.5rem, 5vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 12px;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.slide-content p {
    font-size: clamp(0.9rem, 2.5vw, 1.2rem);
    opacity: 0.9;
    text-shadow: 0 1px 6px rgba(0,0,0,0.3);
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.carousel-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.carousel-dots .dot.active {
    background: #fff;
    transform: scale(1.2);
}

/* Hero 统计条 */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 20px;
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
    margin-left: 4px;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--gray-light);
}

.stat-badge {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* ========== 服务区块 ========== */
.services {
    padding: 60px 0;
    background: #fff;
}

.section-title {
    text-align: center;
    font-size: clamp(1.4rem, 4vw, 2rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
}

.section-title.light {
    color: #fff;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 40px;
}

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

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

.service-card {
    background: var(--light);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid #e2e8f0;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.service-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--dark);
}

.service-card ul {
    text-align: left;
}

.service-card li {
    padding: 5px 0;
    font-size: 0.85rem;
    color: var(--gray);
    position: relative;
    padding-left: 16px;
}

.service-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-light);
    transform: translateY(-50%);
}

/* ========== 联系方式 ========== */
.contact {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.contact-card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    color: #fff;
    transition: var(--transition);
}

.contact-card:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-4px);
}

.contact-icon {
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.contact-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary-light);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.contact-btn {
    display: inline-block;
    padding: 10px 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.contact-btn:hover {
    background: var(--primary-light);
    box-shadow: 0 4px 16px rgba(37,99,235,0.4);
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    margin: 12px auto;
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
    border: 2px dashed rgba(255,255,255,0.2);
    /* 用户替换为真实二维码图片 */
    background-image: url('qrcode-wechat.jpg');
    background-size: cover;
    background-position: center;
}

/* ========== 工具下载 ========== */
.download {
    padding: 60px 0;
    background: #fff;
}

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

.download-card {
    border: 1px solid #e2e8f0;
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    background: #fff;
}

.download-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.download-img {
    width: 100%;
    height: 140px;
    background: linear-gradient(135deg, var(--light) 0%, #e2e8f0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    font-size: 0.85rem;
    /* 用户替换为真实软件截图 */
    background-size: cover;
    background-position: center;
}

.download-card h4 {
    padding: 14px 16px 4px;
    font-size: 1rem;
    font-weight: 700;
}

.download-card p {
    padding: 0 16px;
    font-size: 0.82rem;
    color: var(--gray);
    line-height: 1.5;
}

.download-btn {
    display: block;
    margin: 14px 16px 16px;
    padding: 10px;
    text-align: center;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--primary-dark);
}

/* ========== 企业简介 ========== */
.about {
    padding: 60px 0;
    background: var(--light);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--gray);
    line-height: 1.8;
    text-align: justify;
}

.about-text p:first-child {
    font-size: 1.05rem;
    color: var(--dark);
    font-weight: 500;
}

/* ========== 底部 ========== */
.footer {
    background: var(--dark);
    color: #fff;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
}

.footer-contact p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.4);
}

/* ========== 浮动联系按钮（手机端） ========== */
.float-contact {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: #fff;
    box-shadow: 0 -2px 16px rgba(0,0,0,0.1);
}

.float-contact a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    border: none;
}

.float-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.phone-float {
    background: var(--primary);
}

.wechat-float {
    background: var(--success);
}

/* ========== 响应式 ========== */

/* 平板 ≤900px */
@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-card:last-child {
        grid-column: span 2;
        max-width: 400px;
        margin: 0 auto;
    }
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}

/* 手机 ≤600px */
@media (max-width: 600px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 12px 20px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    }
    .nav-links.open {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .carousel {
        height: 65vw;
        min-height: 240px;
    }
    .hero-stats {
        flex-direction: column;
        gap: 12px;
    }
    .stat-divider {
        display: none;
    }
    .services-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .service-card {
        display: flex;
        align-items: flex-start;
        text-align: left;
        padding: 20px;
        gap: 16px;
    }
    .service-icon {
        margin-bottom: 0;
        flex-shrink: 0;
    }
    .service-card ul {
        text-align: left;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .contact-card:last-child {
        grid-column: span 1;
        max-width: none;
    }
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .download-img {
        height: 100px;
    }
    .float-contact {
        display: flex;
    }
    body {
        padding-bottom: 56px;
    }
    .about-text p {
        font-size: 0.9rem;
    }
}

/* 小手机 ≤400px */
@media (max-width: 400px) {
    .download-grid {
        grid-template-columns: 1fr;
    }
    .slide-content h2 {
        font-size: 1.3rem;
    }
    .stat-number {
        font-size: 1.4rem;
    }
}