/* ========================================
   企业官网 - 现代风格样式表
   ======================================== */

/* CSS 变量定义 */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --transition: all 0.3s ease;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}
/* logo */
.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
}
/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-top: 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-large {
    padding: 16px 48px;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
    display: inline-flex;
    align-items: center;
}

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

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

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

/* 导航栏下载按钮无下划线 */
.nav-links a.btn {
    text-decoration: none;
}

.nav-links a.btn:hover {
    text-decoration: none;
}

.nav-links a.btn::after {
    display: none;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* ========================================
   主横幅 Hero
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 20px;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 40px;
    line-height: 1.8;
}

/* ========================================
   关于我们
   ======================================== */
.about {
    background: var(--bg-primary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   服务项目
   ======================================== */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-primary);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   合作伙伴
   ======================================== */
.clients {
    background: var(--bg-primary);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    align-items: center;
}

.client-logo {
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--text-light);
    font-weight: 600;
    transition: var(--transition);
}

.client-logo:hover {
    background: var(--primary-color);
    color: white;
}

/* ========================================
   页面标题
   ======================================== */
.page-header {
    padding: 160px 0 80px;
    background: var(--gradient-dark);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    color: white;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* ========================================
   案例筛选
   ======================================== */
.cases-filter {
    background: var(--bg-secondary);
    padding: 40px 0;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

/* ========================================
   案例展示
   ======================================== */
.cases {
    background: var(--bg-primary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.case-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.case-image {
    height: 240px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    font-size: 5rem;
}

.case-content {
    padding: 30px;
}

.case-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.case-content h3 {
    font-size: 1.375rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.case-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.case-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.case-link:hover {
    gap: 12px;
}

/* ========================================
   合作流程
   ======================================== */
.process {
    background: var(--bg-secondary);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

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

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 40px;
    right: -15px;
    width: 30px;
    height: 2px;
    background: var(--border-color);
}

.step-number {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    color: white;
    font-size: 2rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.process-step h4 {
    font-size: 1.125rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.process-step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   CTA 区块
   ======================================== */
.cta {
    background: var(--gradient-primary);
    text-align: center;
    padding: 100px 0;
}

.cta h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 16px;
}

.cta p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

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

/* ========================================
   联系页面样式
   ======================================== */
.contact-info {
    background: var(--bg-primary);
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    align-items: center;
}

.contact-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 1.125rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.contact-detail {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.contact-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 联系表单 */
.contact-form-section {
    background: var(--bg-secondary);
}

.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: 50px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-header {
    text-align: center;
    margin-bottom: 40px;
}

.form-header h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.form-header p {
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

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

/* 地图 */
.map-section {
    background: var(--bg-primary);
    padding-bottom: 0;
}

.map-wrapper {
    margin-top: 40px;
}

.map-placeholder {
    height: 400px;
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.map-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 20px;
}

.map-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

/* FAQ */
.faq {
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

/* ========================================
   反馈页面样式
   ======================================== */
.feedback-section {
    background: var(--bg-secondary);
}

.feedback-wrapper {
    max-width: 800px;
    margin: 0 auto 60px;
    background: var(--bg-primary);
    padding: 50px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-tip {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: -16px;
}

/* 上传区域样式 */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-icon {
    font-size: 3rem;
    display: block;
}

.upload-placeholder p {
    color: var(--text-primary);
    font-weight: 500;
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--text-light);
}

.file-list {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.file-item:hover {
    border-color: var(--primary-color);
}

.file-name {
    flex: 1;
    color: var(--text-primary);
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    color: var(--text-light);
    font-size: 0.875rem;
}

.file-remove {
    width: 28px;
    height: 28px;
    border: none;
    background: #fee2e2;
    color: #dc2626;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.file-remove:hover {
    background: #dc2626;
    color: white;
}

.upload-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: right;
    margin-top: 8px;
}

/* 提交按钮加载状态 */
#submitBtn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* 提交结果 */
.submit-result {
    text-align: center;
    padding: 60px 40px;
}

.result-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: bold;
}

.result-icon.success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.result-icon.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.submit-result h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.submit-result p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* 反馈说明卡片 */
.feedback-tips {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.tip-card {
    background: var(--bg-primary);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.tip-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tip-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
}

.tip-card h4 {
    font-size: 1.125rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.tip-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   下载页面样式
   ======================================== */
.download-section {
    background: var(--bg-secondary);
}

.download-status {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.status-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.download-status h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.download-status p {
    color: var(--text-secondary);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.download-card {
    background: var(--bg-primary);
    padding: 40px 30px;
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
}

.download-card h3 {
    font-size: 1.375rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.download-card .version {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.download-card .size {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.btn-store {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    width: 100%;
    max-width: 280px;
    justify-content: center;
}

.btn-store .store-icon {
    font-size: 1.75rem;
}

.btn-store .store-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.btn-store .store-label {
    font-size: 0.7rem;
    text-transform: uppercase;
}

.btn-store .store-name {
    font-size: 1.125rem;
    font-weight: 700;
}

.btn-appstore {
    background: #000000;
    color: white;
}

.btn-appstore:hover {
    background: #333333;
}

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

.btn-googleplay:hover {
    opacity: 0.9;
}

.btn-direct {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-direct:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.download-tip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tip-icon {
    font-size: 1rem;
}

/* 二维码 */
.qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.qr-code {
    padding: 16px;
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.qr-code canvas {
    display: block;
}

.qr-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 手动选择 */
.manual-select {
    text-align: center;
    padding: 40px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.manual-select h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.manual-select > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.manual-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-icon {
    font-size: 1.25rem;
}

/* 下载指引 */
.guide-section {
    background: var(--bg-primary);
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.guide-step {
    text-align: center;
    padding: 30px;
}

.guide-step .step-num {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.guide-step h4 {
    font-size: 1.125rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.guide-step p {
    color: var(--text-secondary);
}

/* FAQ 下载页面 */
.faq-section {
    background: var(--bg-secondary);
}

.faq-section .faq-list {
    max-width: 800px;
    margin: 0 auto;
}

/* 响应式 */
@media (max-width: 1024px) {
    .download-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .guide-steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .download-cards {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        max-width: 100%;
    }
    
    .btn-store {
        max-width: 100%;
    }
    
    .manual-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-outline {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question h4 {
    font-size: 1.05rem;
    color: var(--text-primary);
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 300;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   协议/政策页面样式
   ======================================== */
.agreement-section {
    background: var(--bg-secondary);
    min-height: 60vh;
}

.agreement-content {
    max-width: 900px;
    margin: 0 auto;
}

.agreement-block {
    background: var(--bg-primary);
    padding: 30px 40px;
    /* border-radius: var(--radius-lg); */
    margin-bottom: 0;
    box-shadow: none;
    /* border-bottom: 1px solid var(--border-color); */
}

.agreement-block:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.agreement-block h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.agreement-block p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
    font-size: 1rem;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 2fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: white;
    font-size: 1.125rem;
    margin-bottom: 20px;
}

.footer-section p {
    line-height: 1.8;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .services-grid,
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-step:not(:last-child)::after {
        display: none;
    }
    
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
        display: none;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .clients-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .page-header {
        padding: 120px 0 60px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-buttons {
        flex-direction: column;
    }
    
    .filter-btn {
        width: 100%;
    }
    
    .feedback-tips {
        grid-template-columns: 1fr;
    }
    
    .feedback-wrapper {
        padding: 30px 20px;
    }
}