/* ========================================
   企业官网 - 全站样式表
   纯静态站点 | 1920px基准 | 响应式布局
   ======================================== */

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

/* ---- 品牌变量 ---- */
:root {
    /* 主色 - 商务蓝 */
    --primary: #1565c0;
    --primary-dark: #0d47a1;
    --primary-light: #1e88e5;

    /* 模块区分色 */
    --app-color: #4a9eff;       /* 应用层 - 浅蓝色 */
    --tool-color: #f08c4a;      /* 工具层 - 暖橙色 */
    --store-color: #2dbba6;     /* 存储层 - 青绿色 */
    --collect-color: #5b7a99;   /* 采集层 - 灰蓝色 */

    /* 中性色 */
    --text-dark: #1a1a1a;
    --text-body: #333333;
    --text-mute: #6b6b6b;
    --text-light: #999999;
    --border-color: #e0e0e0;
    --bg-gray: #f6f7f9;
    --bg-gray-dark: #f0f2f5;
    --white: #ffffff;

    /* 尺寸 */
    --header-height: 72px;
    --max-width: 1200px;
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- 全局样式 ---- */
html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
    flex-shrink: 0;
}

.logo-img {
    height: 38px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
}

.nav-menu ul {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    position: relative;
    padding: 4px 0;
}

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

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

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

/* 移动端汉堡按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}

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

/* ========================================
   通用区块
   ======================================== */
.section {
    padding: 80px 0;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-mute);
    max-width: 720px;
    margin: 0 auto;
}

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

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

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(21, 101, 192, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.6);
}

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

.btn-lg {
    padding: 16px 44px;
    font-size: 17px;
}

/* ========================================
   首页 Banner
   ======================================== */
.hero {
    min-height: 600px;
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #0a2f6e 0%, #1565c0 50%, #1e88e5 100%);
    color: var(--white);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, rgba(74, 158, 255, 0.08) 0%, transparent 50%);
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

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

.hero-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-illustration {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 1;
    position: relative;
}

/* 架构简化插画 */
.arch-mini {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    backdrop-filter: blur(8px);
}

.arch-mini-layer {
    padding: 16px 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.arch-mini-layer:hover {
    transform: translateX(8px);
}

.arch-layer-app { background: rgba(74, 158, 255, 0.3); border-left: 4px solid #4a9eff; }
.arch-layer-tool { background: rgba(240, 140, 74, 0.3); border-left: 4px solid #f08c4a; }
.arch-layer-store { background: rgba(45, 187, 166, 0.3); border-left: 4px solid #2dbba6; }
.arch-layer-collect { background: rgba(91, 122, 153, 0.3); border-left: 4px solid #5b7a99; }

/* ========================================
   核心价值卡片
   ======================================== */
.value-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.value-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
}

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

.value-icon {
    width: 64px;
    height: 64px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
}

.value-card:nth-child(1) .value-icon { background: rgba(91, 122, 153, 0.12); color: var(--collect-color); }
.value-card:nth-child(2) .value-icon { background: rgba(45, 187, 166, 0.12); color: var(--store-color); }
.value-card:nth-child(3) .value-icon { background: rgba(240, 140, 74, 0.12); color: var(--tool-color); }
.value-card:nth-child(4) .value-icon { background: rgba(74, 158, 255, 0.12); color: var(--app-color); }

.value-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.value-card p {
    font-size: 14px;
    color: var(--text-mute);
    line-height: 1.6;
}

/* ========================================
   架构全景预览
   ======================================== */
.arch-preview {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.arch-layer {
    border-radius: 12px;
    padding: 28px 32px;
    display: grid;
    grid-template-columns: 200px 1fr auto;
    align-items: center;
    gap: 24px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.arch-layer:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}

.arch-layer .arch-label {
    font-size: 18px;
    font-weight: 700;
}

.arch-layer .arch-desc {
    font-size: 14px;
    opacity: 0.85;
}

.arch-layer .arch-arrow {
    font-size: 24px;
    opacity: 0.6;
}

.arch-layer-app    { background: linear-gradient(135deg, #4a9eff, #3a7dd6); color: var(--white); }
.arch-layer-tool   { background: linear-gradient(135deg, #f08c4a, #d97530); color: var(--white); }
.arch-layer-store  { background: linear-gradient(135deg, #2dbba6, #1e9e8c); color: var(--white); }
.arch-layer-collect{ background: linear-gradient(135deg, #5b7a99, #446080); color: var(--white); }

/* ========================================
   场景入口卡片
   ======================================== */
.scene-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.scene-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
}

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

.scene-card-body {
    padding: 28px 24px;
}

.scene-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: rgba(21, 101, 192, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 16px;
}

.scene-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.scene-card p {
    font-size: 14px;
    color: var(--text-mute);
    margin-bottom: 16px;
}

.scene-card .scene-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ========================================
   CTA通栏
   ======================================== */
.cta-banner {
    padding: 64px 0;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: var(--white);
    text-align: center;
}

.cta-banner h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-banner p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

/* ========================================
   产品平台页 - 架构详情
   ======================================== */
.arch-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.arch-detail:nth-child(even) .arch-detail-visual {
    order: -1;
}

.arch-detail-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.arch-detail-content p {
    font-size: 16px;
    color: var(--text-mute);
    margin-bottom: 20px;
    line-height: 1.8;
}

.arch-detail-content ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.arch-detail-content ul li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text-body);
}

.arch-detail-content ul li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    font-size: 18px;
}

.arch-detail-visual {
    padding: 40px;
    border-radius: 16px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
}

.arch-visual-collect { background: linear-gradient(135deg, rgba(91, 122, 153, 0.15), rgba(91, 122, 153, 0.05)); border: 1px solid rgba(91, 122, 153, 0.3); }
.arch-visual-store { background: linear-gradient(135deg, rgba(45, 187, 166, 0.15), rgba(45, 187, 166, 0.05)); border: 1px solid rgba(45, 187, 166, 0.3); }
.arch-visual-tool { background: linear-gradient(135deg, rgba(240, 140, 74, 0.15), rgba(240, 140, 74, 0.05)); border: 1px solid rgba(240, 140, 74, 0.3); }
.arch-visual-app { background: linear-gradient(135deg, rgba(74, 158, 255, 0.15), rgba(74, 158, 255, 0.05)); border: 1px solid rgba(74, 158, 255, 0.3); }

.arch-detail-visual .tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.arch-detail-visual .tag {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
}

.tag-collect { background: rgba(91, 122, 153, 0.15); color: var(--collect-color); }
.tag-store { background: rgba(45, 187, 166, 0.15); color: var(--store-color); }
.tag-tool { background: rgba(240, 140, 74, 0.15); color: var(--tool-color); }
.tag-app { background: rgba(74, 158, 255, 0.15); color: var(--app-color); }

/* 平台价值总结 */
.value-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.value-summary-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
}

.value-summary-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.value-summary-card .vs-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(21, 101, 192, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 20px;
}

.value-summary-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.value-summary-card p {
    font-size: 14px;
    color: var(--text-mute);
}

/* ========================================
   解决方案页
   ======================================== */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.solution-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 36px 32px;
    transition: var(--transition);
}

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

.solution-card .sol-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 20px;
    background: rgba(21, 101, 192, 0.1);
    color: var(--primary);
}

.solution-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 15px;
    color: var(--text-mute);
    margin-bottom: 20px;
    line-height: 1.7;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.solution-tags .tag {
    padding: 6px 14px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    background: var(--bg-gray-dark);
    color: var(--text-body);
}

/* 方案价值区 */
.benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.benefit-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.benefit-card .benefit-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 12px;
}

.benefit-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.benefit-card p {
    font-size: 14px;
    color: var(--text-mute);
}

/* ========================================
   技术优势页
   ======================================== */
.tech-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    margin-bottom: 80px;
}

.tech-detail:nth-child(even) .tech-visual {
    order: -1;
}

.tech-visual {
    height: 320px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--white);
}

.tech-visual-1 { background: linear-gradient(135deg, var(--primary), var(--primary-light)); }
.tech-visual-2 { background: linear-gradient(135deg, var(--tool-color), #d97530); }
.tech-visual-3 { background: linear-gradient(135deg, var(--collect-color), #446080); }
.tech-visual-4 { background: linear-gradient(135deg, var(--app-color), #3a7dd6); }

.tech-content .tech-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 4px;
    background: rgba(21, 101, 192, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}

.tech-content h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 18px;
}

.tech-content p {
    font-size: 16px;
    color: var(--text-mute);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 补充特性 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
}

.feature-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.feature-item .feat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: rgba(21, 101, 192, 0.08);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 16px;
}

.feature-item h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-mute);
}

/* ========================================
   关于我们页
   ======================================== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 16px;
    color: var(--text-mute);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-visual {
    height: 400px;
    background: linear-gradient(135deg, rgba(21, 101, 192, 0.1), rgba(30, 136, 229, 0.05));
    border: 1px solid rgba(21, 101, 192, 0.2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
}

.about-visual .vis-icon {
    width: 100px;
    height: 100px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--white);
}

.about-visual .vis-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

/* 服务理念 */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.philosophy-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
}

.philosophy-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.philosophy-card .ph-icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin: 0 auto 20px;
}

.philosophy-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.philosophy-card p {
    font-size: 14px;
    color: var(--text-mute);
}

/* 愿景通栏 */
.vision-banner {
    padding: 80px 0;
    background: linear-gradient(135deg, #0a2f6e, #1565c0);
    text-align: center;
    color: var(--white);
}

.vision-banner h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.vision-banner p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.8);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

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

.contact-item .ci-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(21, 101, 192, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-item .ci-content h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.contact-item .ci-content p {
    font-size: 15px;
    color: var(--text-mute);
}

/* 表单 */
.contact-form {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
}

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

.form-note {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 8px;
}

/* 企业微信二维码 */
.qr-code-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px 0;
}

.qr-code-box {
    width: 220px;
    height: 220px;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-gray);
    margin-bottom: 20px;
    overflow: hidden;
}

.qr-code-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-code-tip {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.qr-code-tip i {
    color: var(--primary);
    margin-right: 6px;
}

.qr-code-sub {
    font-size: 13px;
    color: var(--text-light);
}

/* 合作流程 */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.process-step .ps-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 16px;
}

.process-step h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-mute);
    padding: 0 12px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: #1a1f2e;
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 24px;
}

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

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 18px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* ========================================
   滚动动画
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ========================================
   页面顶部通栏标题
   ======================================== */
.page-hero {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, #0a2f6e, #1565c0);
    color: var(--white);
    text-align: center;
}

.page-hero h1 {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 720px;
    margin: 0 auto;
}

/* ========================================
   响应式 - 平板
   ======================================== */
@media (max-width: 1024px) {
    .container { max-width: 100%; padding: 0 32px; }

    .nav-menu { gap: 24px; }

    .hero { min-height: auto; padding: 100px 0 60px; }
    .hero .container { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { display: none; }
    .hero-title { font-size: 34px; }

    .value-grid { grid-template-columns: repeat(2, 1fr); }
    .scene-grid { grid-template-columns: repeat(2, 1fr); }

    .arch-detail,
    .tech-detail { grid-template-columns: 1fr; gap: 40px; }
    .arch-detail:nth-child(even) .arch-detail-visual,
    .tech-detail:nth-child(even) .tech-visual { order: 0; }

    .about-intro { grid-template-columns: 1fr; }
    .contact-main { grid-template-columns: 1fr; }

    .solution-grid { grid-template-columns: 1fr; }
    .value-summary, .benefit-grid, .philosophy-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }

    .footer-top { grid-template-columns: 1fr 1fr; }

    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .process-steps::before { display: none; }
}

/* ========================================
   响应式 - 移动端
   ======================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--white);
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-200%);
        transition: var(--transition);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 0;
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-menu li {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-toggle { display: flex; }

    .section { padding: 56px 0; }
    .section-title { font-size: 28px; }
    .page-hero h1 { font-size: 30px; }
    .page-hero { padding: 110px 0 40px; }

    .hero-title { font-size: 28px; }
    .hero-subtitle { font-size: 16px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }

    .value-grid,
    .scene-grid,
    .value-summary,
    .benefit-grid,
    .philosophy-grid,
    .feature-grid { grid-template-columns: 1fr; }

    .arch-layer {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .footer-top { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

    .process-steps { grid-template-columns: 1fr; }
    .process-step { margin-bottom: 24px; }

    .contact-form { padding: 24px; }

    .cta-banner h2 { font-size: 26px; }
}