/* ==========================================================================
   长沙迎丰信息技术有限公司 - 企业官网样式
   设计理念：简约大气、科技感、专业可靠
   ========================================================================== */

/* ---------- CSS 变量 ---------- */
:root {
    --primary: #1B4D8C;
    --primary-dark: #0F2F5C;
    --primary-light: #2E6BB8;
    --accent: #00B4D8;
    --accent-light: #48CAE4;
    --text-dark: #1A2B3C;
    --text-body: #4A5568;
    --text-light: #8896A6;
    --bg-white: #FFFFFF;
    --bg-light: #F7F9FC;
    --bg-gray: #EEF2F7;
    --border: #E2E8F0;
    --shadow-sm: 0 2px 8px rgba(27, 77, 140, 0.06);
    --shadow-md: 0 8px 24px rgba(27, 77, 140, 0.10);
    --shadow-lg: 0 16px 48px rgba(27, 77, 140, 0.14);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-body);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* ---------- 通用容器 ---------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-sm {
    padding: 64px 0;
}

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

.bg-gradient {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

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

/* ---------- 标题 ---------- */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-header .label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
    padding: 6px 16px;
    background: rgba(0, 180, 216, 0.08);
    border-radius: 20px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 20px;
}

.section-header p {
    font-size: 1.0625rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* 白色标题（用于深色背景） */
.section-header.light h2 {
    color: #fff;
}

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

.section-header.light .label {
    background: rgba(0, 180, 216, 0.2);
    color: var(--accent-light);
}

/* ==========================================================================
   导航栏
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

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

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

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.1875rem;
    color: var(--text-dark);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(27, 77, 140, 0.3);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text .cn {
    font-size: 1rem;
    font-weight: 700;
}

.logo-text .en {
    font-size: 0.625rem;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a {
    padding: 8px 18px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 8px;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary);
    background: rgba(27, 77, 140, 0.06);
}

.nav-menu a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

/* 导航 CTA 按钮 */
.nav-cta {
    padding: 10px 24px !important;
    background: var(--primary) !important;
    color: #fff !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
}

.nav-cta:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

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

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-accent {
    background: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: #00A0C0;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 180, 216, 0.3);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

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

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

.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1rem;
}

/* ==========================================================================
   首页 Hero
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    background: linear-gradient(135deg, #0A1E3A 0%, #122E5A 40%, #1B4D8C 100%);
    overflow: hidden;
}

/* 背景装饰 */
.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -300px;
    left: -200px;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(46, 107, 184, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

/* 网格背景 */
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(0, 180, 216, 0.15);
    border: 1px solid rgba(0, 180, 216, 0.3);
    border-radius: 24px;
    color: var(--accent-light);
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 28px;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
    font-size: 3.25rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

/* Hero 右侧视觉 */
.hero-visual {
    position: relative;
    height: 480px;
}

.hero-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.hero-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 180, 216, 0.3);
}

.hero-card-1 {
    top: 0;
    left: 0;
    width: 280px;
    animation: float1 6s ease-in-out infinite;
}

.hero-card-2 {
    top: 180px;
    right: 0;
    width: 260px;
    animation: float2 7s ease-in-out infinite;
}

.hero-card-3 {
    bottom: 0;
    left: 40px;
    width: 300px;
    animation: float3 8s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

@keyframes float2 {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(12px); }
}

@keyframes float3 {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.hero-card-icon.blue {
    background: rgba(46, 107, 184, 0.3);
}

.hero-card-icon.cyan {
    background: rgba(0, 180, 216, 0.3);
}

.hero-card-icon.purple {
    background: rgba(139, 92, 246, 0.3);
}

.hero-card h4 {
    color: #fff;
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.hero-card p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    margin: 0;
}

/* Hero 统计条 */
.hero-stats {
    position: relative;
    z-index: 2;
    margin-top: 80px;
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

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

.stat-item .num {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-item .num .unit {
    font-size: 1.25rem;
    color: var(--accent-light);
}

.stat-item .label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   核心业务卡片
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 24px;
    background: linear-gradient(135deg, rgba(27, 77, 140, 0.08), rgba(0, 180, 216, 0.08));
}

.service-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-card .features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-card .features li {
    font-size: 0.8125rem;
    color: var(--primary);
    background: rgba(27, 77, 140, 0.06);
    padding: 4px 12px;
    border-radius: 6px;
    font-weight: 500;
}

/* ==========================================================================
   关于我们简介（首页）
   ========================================================================== */
.about-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-preview-visual {
    position: relative;
}

.about-preview-img {
    width: 100%;
    height: 420px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-preview-img .pattern {
    position: absolute;
    inset: 0;
    opacity: 0.15;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(0, 180, 216, 0.5) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(72, 202, 228, 0.3) 0%, transparent 50%);
}

.about-preview-img .content-box {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 40px;
}

.about-preview-img .content-box .big-num {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}

.about-preview-img .content-box .desc {
    font-size: 1rem;
    opacity: 0.8;
}

/* 浮动标签 */
.about-preview-badge {
    position: absolute;
    bottom: -24px;
    right: -24px;
    background: #fff;
    border-radius: var(--radius);
    padding: 20px 28px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 16px;
}

.about-preview-badge .icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.about-preview-badge .text strong {
    display: block;
    font-size: 1rem;
    color: var(--text-dark);
}

.about-preview-badge .text span {
    font-size: 0.8125rem;
    color: var(--text-light);
}

.about-preview-content .label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 16px;
    padding: 6px 16px;
    background: rgba(0, 180, 216, 0.08);
    border-radius: 20px;
}

.about-preview-content h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.35;
    margin-bottom: 24px;
}

.about-preview-content p {
    font-size: 1rem;
    color: var(--text-body);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 32px 0;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.about-feature .check {
    width: 24px;
    height: 24px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.75rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.about-feature .text {
    font-size: 0.9375rem;
    color: var(--text-dark);
    font-weight: 500;
}

/* ==========================================================================
   优势区域
   ========================================================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.advantage-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(0, 180, 216, 0.3);
    transform: translateY(-6px);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.2), rgba(72, 202, 228, 0.1));
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.advantage-card h3 {
    font-size: 1.1875rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.7;
}

/* ==========================================================================
   CTA 区域
   ========================================================================== */
.cta-section {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(0, 180, 216, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 50%, rgba(46, 107, 184, 0.2) 0%, transparent 40%);
}

.cta-section .container {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.75);
}

/* ==========================================================================
   页面 Banner（内页头部）
   ========================================================================== */
.page-banner {
    position: relative;
    padding: 160px 0 80px;
    background: linear-gradient(135deg, #0A1E3A 0%, #122E5A 50%, #1B4D8C 100%);
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.page-banner .container {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-banner .breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 24px;
}

.page-banner .breadcrumb a:hover {
    color: var(--accent-light);
}

.page-banner .breadcrumb .sep {
    color: rgba(255, 255, 255, 0.3);
}

.page-banner h1 {
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.page-banner p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   关于我们页面
   ========================================================================== */

/* 公司介绍 */
.company-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.company-intro-visual {
    height: 440px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.company-intro-visual .deco {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
}

.company-intro-visual .circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.company-intro-visual .circle-1 {
    width: 300px;
    height: 300px;
}

.company-intro-visual .circle-2 {
    width: 400px;
    height: 400px;
}

.company-intro-visual .center-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.company-intro-visual .center-content .logo-letter {
    font-size: 5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-light), #fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.company-intro-visual .center-content .tagline {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 12px;
    letter-spacing: 4px;
}

.company-intro-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
    line-height: 1.35;
}

.company-intro-content p {
    font-size: 1rem;
    color: var(--text-body);
    line-height: 1.9;
    margin-bottom: 16px;
}

.company-info-list {
    margin-top: 32px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.company-info-list li {
    display: flex;
    gap: 12px;
    font-size: 0.9375rem;
}

.company-info-list .label {
    color: var(--text-light);
    min-width: 80px;
}

.company-info-list .value {
    color: var(--text-dark);
    font-weight: 500;
}

/* 发展历程 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 40px 48px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 6px;
    width: 16px;
    height: 16px;
    background: #fff;
    border: 3px solid var(--primary);
    border-radius: 50%;
    z-index: 2;
}

.timeline-item:nth-child(odd)::before {
    right: -8px;
}

.timeline-item:nth-child(even)::before {
    left: -8px;
}

.timeline-item .year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.timeline-item .title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.timeline-item p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* 企业文化/价值观 */
.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.value-card {
    text-align: center;
    padding: 48px 32px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.value-card .icon-circle {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #fff;
}

.value-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.value-card p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* ==========================================================================
   产品服务页面
   ========================================================================== */

/* 服务详情 */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 100px;
}

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

.service-detail.reverse {
    direction: rtl;
}

.service-detail.reverse > * {
    direction: ltr;
}

.service-detail-visual {
    height: 400px;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-detail-visual.web {
    background: linear-gradient(135deg, #0F2F5C, #1B4D8C, #2E6BB8);
}

.service-detail-visual.app {
    background: linear-gradient(135deg, #0A1E3A, #1B4D8C, #00B4D8);
}

.service-detail-visual .visual-icon {
    font-size: 6rem;
    opacity: 0.9;
}

.service-detail-visual .visual-deco {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 30px 30px;
}

.service-detail-content .tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 180, 216, 0.1);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.service-detail-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.service-detail-content > p {
    font-size: 1rem;
    color: var(--text-body);
    line-height: 1.9;
    margin-bottom: 28px;
}

.service-detail-list {
    display: grid;
    gap: 16px;
}

.service-detail-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.service-detail-list .check-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.75rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.service-detail-list .item-content strong {
    display: block;
    font-size: 1rem;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.service-detail-list .item-content span {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* 技术栈 */
.tech-stack {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.tech-item {
    text-align: center;
    padding: 28px 16px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.tech-item .tech-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    border-radius: 10px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.tech-item .tech-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* 服务流程 */
.process-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
}

.process-flow::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 16px;
}

.process-step .step-num {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: #fff;
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    position: relative;
}

.process-step .step-num::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 1px dashed var(--accent);
    opacity: 0.4;
}

.process-step h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ==========================================================================
   联系我们页面
   ========================================================================== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info-card {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.contact-info-card::before {
    content: '';
    position: absolute;
    bottom: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.contact-info-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
}

.contact-info-card > p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    position: relative;
}

.contact-info-list {
    position: relative;
    display: grid;
    gap: 28px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-info-item .icon-box {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-info-item .info-content .label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 4px;
}

.contact-info-item .info-content .value {
    font-size: 1rem;
    font-weight: 500;
    color: #fff;
    line-height: 1.5;
}

/* 联系表单 */
.contact-form-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--shadow-sm);
}

.contact-form-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.contact-form-card > p {
    font-size: 0.9375rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group label .required {
    color: #E53E3E;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-dark);
    background: var(--bg-light);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(27, 77, 140, 0.1);
}

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

.form-submit {
    width: 100%;
    padding: 16px;
    font-size: 1rem;
    justify-content: center;
}

/* 地图区域 */
.map-section {
    background: var(--bg-light);
}

.map-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: #fff;
}

.map-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #E8EEF5, #D5DEE8);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.map-placeholder .map-content {
    text-align: center;
    color: var(--text-body);
}

.map-placeholder .map-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.map-placeholder .map-text {
    font-size: 1rem;
    font-weight: 500;
}

.map-placeholder .map-addr {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 8px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background: #0A1A2E;
    color: rgba(255, 255, 255, 0.7);
    padding: 72px 0 0;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col ul {
    display: grid;
    gap: 12px;
}

.footer-col ul a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-col ul a:hover {
    color: var(--accent-light);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    gap: 10px;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 12px;
    align-items: flex-start;
}

.footer-contact .icon {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom .links {
    display: flex;
    gap: 24px;
}

.footer-bottom .links a:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* ==========================================================================
   动画
   ========================================================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .services-grid,
    .advantages-grid,
    .values-grid,
    .tech-stack {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-stack {
        gap: 16px;
    }

    .process-flow {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 0;
    }

    .process-flow::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        box-shadow: var(--shadow-md);
        gap: 4px;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        width: 100%;
        padding: 12px 16px;
    }

    .nav-toggle {
        display: flex;
    }

    .hero .container {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        display: none;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-stats .container {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .section {
        padding: 64px 0;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .about-preview,
    .company-intro,
    .service-detail,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .service-detail.reverse {
        direction: ltr;
    }

    .about-preview-badge {
        right: 20px;
    }

    .services-grid,
    .advantages-grid,
    .values-grid,
    .about-features,
    .company-info-list,
    .form-row {
        grid-template-columns: 1fr;
    }

    .tech-stack {
        grid-template-columns: repeat(3, 1fr);
    }

    .process-flow {
        grid-template-columns: 1fr;
    }

    .cta-section .container {
        flex-direction: column;
        text-align: center;
    }

    .page-banner h1 {
        font-size: 2.25rem;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 48px;
        padding-right: 0;
    }

    .timeline-item::before {
        left: 12px !important;
        right: auto !important;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}