/* ============================================
   飞创学术官网 - 主样式表
   版本: 1.0
   作者: 小灰灰
   说明: 响应式设计，移动端优先
   ============================================ */

/* CSS变量定义 */
:root {
    /* 品牌色系 */
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    
    /* 辅助色 */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, monospace;
    
    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: #fff;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    display: block;
    flex-shrink: 0;
}

.nav-menu {
    display: none;
    align-items: center;
    gap: var(--space-6);
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    padding: var(--space-2) 0;
    position: relative;
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.btn-share {
    display: none;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-share:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

.btn-login {
    padding: var(--space-2) var(--space-4);
    background: var(--primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.btn-login:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* 汉堡菜单 */
.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单 */
@media (max-width: 1023px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-4);
        gap: 0;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: var(--space-3) 0;
        border-bottom: 1px solid var(--gray-100);
    }
    
    .nav-link::after {
        display: none;
    }
}

@media (min-width: 1024px) {
    .hamburger {
        display: none;
    }
    
    .nav-menu {
        display: flex;
    }
    
    .btn-share {
        display: flex;
    }
}

/* ============================================
   首屏KV区
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px var(--space-4) var(--space-12);
    overflow: hidden;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #dbeafe 100%);
}

.fwxm {
    padding: 50px var(--space-4) var(--space-12) !important;
    min-height: 50vh !important;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(30, 58, 138, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
    z-index: 0;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-6);
    animation: fadeInDown 0.6s ease;
}

.hero-badge i {
    color: var(--accent);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    animation: fadeInUp 0.6s ease 0.1s both;
}

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

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.commission-highlight {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 600;
}

.commission-highlight strong {
    font-size: 1.25rem;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    box-shadow: 0 4px 14px rgba(30, 58, 138, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 58, 138, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    background: white;
    color: var(--primary);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid var(--primary);
    transition: all var(--transition-fast);
}

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

.hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    animation: fadeInUp 0.6s ease 0.4s both;
}

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

.stat-number {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-1);
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }
    
    .hero-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 4rem;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   快捷功能入口区
   ============================================ */
.quick-access {
    padding: var(--space-8) 0;
    background: white;
    border-bottom: 1px solid var(--gray-200);
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.quick-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-5);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.quick-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.quick-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    color: white;
    font-size: 1.5rem;
}

.quick-text {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-700);
}

/* 手机端：5个图标一行显示 */
@media (max-width: 639px) {
    .quick-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: var(--space-2);
    }
    .quick-card {
        padding: var(--space-3) var(--space-2);
        gap: var(--space-2);
    }
    .quick-icon {
        width: 40px;
        height: 40px;
    }
    .quick-icon i {
        font-size: 1rem;
    }
    .quick-text {
        font-size: 0.75rem;
    }
}

@media (min-width: 640px) {
    .quick-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .quick-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ============================================
   通用区块样式
   ============================================ */
section {
    padding: var(--space-16) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-tag {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
}

@media (min-width: 640px) {
    .section-title {
        font-size: 2.5rem;
    }
}

/* ============================================
   服务项目页
   ============================================ */
.services {
    background: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    width: 100%;
}

.service-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-200);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    font-size: 1.75rem;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-4);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.service-desc {
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9375rem;
}

.service-link:hover {
    gap: var(--space-3);
}

@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

@media (max-width: 600px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   成功案例库
   ============================================ */
.cases-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: var(--space-8);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.filter-hint {
    text-align: center;
    font-size: .82rem;
    color: var(--primary);
    background: rgba(99,102,241,.07);
    border: 1px dashed rgba(99,102,241,.3);
    border-radius: var(--radius-full);
    padding: 7px 20px;
    margin: -12px auto 18px;
    display: inline-block;
    left: 50%;
    position: relative;
    transform: translateX(-50%);
    opacity: 1;
    transition: opacity .4s ease;
}
.filter-hint.hint-fade-out { opacity: 0; }

.filter-btn {
    padding: 4px 12px;
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: all var(--transition-fast);
    cursor: pointer;
}
.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 2px 10px rgba(99,102,241,.35);
}
.filter-btn.active::after {
    content: ' ↗';
    font-size: .72rem;
    opacity: .8;
}

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

.cases-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.case-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.case-card.case-more {
    cursor: pointer;
    border: 2px dashed var(--primary-light);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
}

.case-card.case-more:hover {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.case-card.case-more .case-image {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.case-card.case-more .case-icon {
    color: var(--primary);
    animation: pulse 2s infinite;
}

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

.case-image {
    position: relative;
    height: 150px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-badge {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    padding: var(--space-1) var(--space-3);
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
}

.case-icon {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.3);
}

.case-content {
    padding: var(--space-4);
}

.case-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
    line-height: 1.4;
}

.case-meta {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.case-meta span {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.case-meta i {
    margin-right: var(--space-1);
}

.case-highlight {
    font-size: 0.9375rem;
    color: var(--success);
    font-weight: 500;
}

@media (min-width: 640px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }
}

@media (min-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }
}

/* ============================================
   用户中心
   ============================================ */
.user-center {
    background: var(--gray-50);
}

.login-prompt {
    text-align: center;
    padding: var(--space-12) var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.login-icon {
    font-size: 5rem;
    color: var(--gray-300);
    margin-bottom: var(--space-4);
}

.login-prompt h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.login-prompt p {
    font-size: 1rem;
    color: var(--gray-500);
    margin-bottom: var(--space-6);
}

/* 佣金看板 */
.commission-board {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.commission-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.commission-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
}

.commission-card.total .commission-icon {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
}

.commission-card.settled .commission-icon {
    background: linear-gradient(135deg, var(--success) 0%, #34d399 100%);
    color: white;
}

.commission-card.pending .commission-icon {
    background: linear-gradient(135deg, var(--info) 0%, #60a5fa 100%);
    color: white;
}

.commission-info {
    flex: 1;
}

.commission-label {
    display: block;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: var(--space-1);
}

.commission-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--gray-900);
}

/* 推广区 */
.promo-section {
    margin-bottom: var(--space-8);
}

.promo-section .section-subtitle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.promo-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.promo-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.promo-desc {
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-bottom: var(--space-4);
}

.promo-link-box {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.promo-link {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    color: var(--gray-600);
}

.btn-copy {
    padding: var(--space-3) var(--space-4);
    background: var(--primary);
    color: white;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
}

.promo-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.btn-share-wechat,
.btn-share-qq,
.btn-download-poster {
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
}

.btn-share-wechat {
    background: #07c160;
    color: white;
}

.btn-share-qq {
    background: #12b7f5;
    color: white;
}

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

/* 推广统计 */
.promo-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.stat-card {
    text-align: center;
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.stat-card .stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: var(--space-1);
}

.stat-card .stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* 订单系统 */
.orders-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.orders-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--gray-200);
}

.order-filter-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--gray-100);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

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

.order-empty {
    text-align: center;
    padding: var(--space-12);
    color: var(--gray-400);
}

.order-empty i {
    font-size: 4rem;
    margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
    .commission-board {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   干货知识专区
   ============================================ */
.resources {
    background: white;
}

.resources-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.resource-tab {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    color: #475569;
    background: #f1f5f9;
    text-decoration: none;
    transition: all .2s;
    border: none;
    flex-shrink: 0;
}

.resource-tab:hover {
    background: #dbeafe;
    color: #1d4ed8;
}

/* 软件安装包 - 蓝色 */
.resource-tab[data-category="software"].active,
.resource-tab[data-category="software"]:hover {
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,.28);
}

/* 电子资料 - 青蓝色 */
.resource-tab[data-category="templates"].active,
.resource-tab[data-category="templates"]:hover {
    background: linear-gradient(135deg, #0f4c81, #0891b2);
    color: #fff;
    box-shadow: 0 2px 8px rgba(8,145,178,.28);
}

/* 学术干货 - 紫色 */
.resource-tab[data-category="guides"].active,
.resource-tab[data-category="guides"]:hover {
    background: linear-gradient(135deg, #2e1065, #7c3aed);
    color: #fff;
    box-shadow: 0 2px 8px rgba(124,58,237,.28);
}

.resources-content {
    position: relative;
}

.resource-panel {
    display: none;
}

.resource-panel.active {
    display: block;
}

.resource-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
}

.resource-card {
    text-align: center;
    padding: var(--space-6);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.resource-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
}

.resource-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    font-size: 2rem;
    border-radius: var(--radius-xl);
    margin: 0 auto var(--space-4);
}

.resource-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.resource-card p {
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-bottom: var(--space-4);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    background: white;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

@media (min-width: 640px) {
    .resource-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .resource-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   售后与帮助中心
   ============================================ */
.help {
    background: var(--gray-50);
}

.help-content {
    display: grid;
    gap: var(--space-8);
}

.help-contact {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

.contact-card {
    text-align: center;
    padding: var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.contact-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--space-3);
}

.contact-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.contact-card p {
    font-size: 1rem;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.contact-note {
    font-size: 0.875rem;
    color: var(--gray-400);
}

/* FAQ */
.faq-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.faq-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    cursor: pointer;
    font-weight: 600;
    color: var(--gray-800);
}

.faq-question i {
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding-bottom: var(--space-4);
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 查重链接 */
.check-links {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.check-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.check-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.check-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.check-card:hover {
    background: var(--primary);
}

.check-card:hover .check-name,
.check-card:hover .check-desc {
    color: white;
}

.check-name {
    font-weight: 700;
    color: var(--gray-900);
}

.check-desc {
    font-size: 0.75rem;
    color: var(--gray-500);
}

@media (min-width: 640px) {
    .help-contact {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .check-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   售后服务页面重构样式
   ============================================ */

/* 3张服务承诺卡片 */
.help-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
    margin-bottom: var(--space-10);
}

.help-card {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    transition: all var(--transition-base);
}

.help-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.help-card-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.help-card-body h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.help-card-main {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-1);
}

.help-card-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.6;
}

.help-card-footer {
    margin-top: auto;
    padding-top: var(--space-3);
    border-top: 1px solid var(--gray-100);
    font-size: 0.75rem;
    color: var(--gray-400);
    line-height: 1.5;
}

/* 通用模块块（FAQ / 查重平台） */
.help-block {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    padding: var(--space-8) var(--space-10);
    margin-bottom: var(--space-6);
}

.help-block-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--gray-100);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.help-block-title i {
    color: var(--primary);
}

/* FAQ 手风琴优化 */
.help-block .faq-list {
    display: flex;
    flex-direction: column;
}

.help-block .faq-item {
    border-bottom: 1px solid var(--gray-100);
}

.help-block .faq-item:last-child {
    border-bottom: none;
}

.help-block .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-800);
    transition: color var(--transition-fast);
    user-select: none;
}

/* FAQ 序号标识 */
.faq-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    font-size: 0.6875rem;
    font-weight: 700;
    font-style: normal;
    border-radius: 6px;
    margin-right: var(--space-3);
    flex-shrink: 0;
    line-height: 1;
    letter-spacing: 0;
}

.help-block .faq-item.active .faq-question .faq-num,
.help-block .faq-question:hover .faq-num {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.help-block .faq-question:hover {
    color: var(--primary);
}

.help-block .faq-question i {
    color: var(--gray-400);
    transition: transform var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--space-4);
}

.help-block .faq-item.active .faq-question {
    color: var(--primary);
}

.help-block .faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--primary);
}

.help-block .faq-answer {
    display: none;
    padding: 0 0 var(--space-4) 36px;
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.8;
}

.help-block .faq-answer p {
    margin: 0;
}

.help-block .faq-answer strong {
    color: var(--gray-800);
    font-weight: 600;
}

.help-block .faq-item.active .faq-answer {
    display: block;
}

/* 查重平台卡片 */
.check-grid-new {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
}

.check-card-new {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-5);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-base);
    background: var(--gray-50);
}

.check-card-new:hover {
    border-color: var(--primary-light);
    background: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.check-card-top {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.check-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    flex-shrink: 0;
}

.check-card-icon.cnki { background: linear-gradient(135deg, #1e3a8a, #3b82f6); }
.check-card-icon.vip  { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
.check-card-icon.wf   { background: linear-gradient(135deg, #0369a1, #38bdf8); }
.check-card-icon.gzd  { background: linear-gradient(135deg, #065f46, #34d399); }

.check-card-name {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2px;
}

.check-card-desc {
    font-size: 0.75rem;
    color: var(--gray-400);
}

.check-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--primary);
    padding: 6px 0 0;
    border-top: 1px solid var(--gray-100);
    transition: gap var(--transition-fast);
}

.check-card-new:hover .check-card-btn {
    gap: 8px;
}

/* 智能客服悬浮按钮 */
.chat-widget-fab {
    position: fixed;
    bottom: 36px;
    right: 32px;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 900;
    box-shadow: 0 4px 16px rgba(30, 58, 138, 0.4);
    transition: all var(--transition-base);
    font-size: 1.375rem;
}

.chat-widget-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(30, 58, 138, 0.5);
}

.chat-fab-label {
    font-size: 0.5rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1;
    margin-top: 2px;
}

.chat-fab-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #22c55e;
    border: 2px solid white;
    animation: fabPulse 2s infinite;
}

@keyframes fabPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

.chat-fab-hint {
    position: fixed;
    bottom: 98px;
    right: 28px;
    font-size: 0.6875rem;
    color: var(--gray-400);
    text-align: right;
    z-index: 900;
    white-space: nowrap;
    pointer-events: none;
}

/* 智能客服弹窗 */
.chat-widget-panel {
    position: fixed;
    bottom: 104px;
    right: 32px;
    width: 340px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.16);
    z-index: 1000;
    display: none;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--gray-200);
    animation: chatSlideUp 0.25s ease;
}

.chat-widget-panel.open {
    display: flex;
}

@keyframes chatSlideUp {
    from { opacity: 0; transform: translateY(16px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
}

.chat-panel-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 0.9375rem;
}

.chat-online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    animation: fabPulse 2s infinite;
}

.chat-panel-close {
    background: none;
    border: none;
    color: rgba(255,255,255,0.8);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.chat-panel-close:hover {
    color: white;
}

.chat-panel-body {
    padding: var(--space-4) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-height: 300px;
    overflow-y: auto;
}

.chat-welcome {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.chat-bubble {
    background: var(--gray-100);
    border-radius: 0 12px 12px 12px;
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    color: var(--gray-700);
    line-height: 1.6;
    max-width: 240px;
}

.chat-bubble.user {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-radius: 12px 0 12px 12px;
    margin-left: auto;
}

.chat-bubble.bot {
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: 0 12px 12px 12px;
}

.chat-msg-row {
    display: flex;
    align-items: flex-end;
    gap: var(--space-2);
}

.chat-msg-row.user {
    flex-direction: row-reverse;
}

.chat-quick-btns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.chat-quick-btns button {
    padding: 5px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    background: white;
    font-size: 0.8125rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-quick-btns button:hover {
    border-color: var(--primary-light);
    color: var(--primary);
    background: #eff6ff;
}

.chat-messages {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.chat-panel-footer {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--gray-100);
}

.chat-panel-footer input {
    flex: 1;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    padding: 8px 14px;
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.chat-panel-footer input:focus {
    border-color: var(--primary-light);
}

.chat-panel-footer button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.chat-panel-footer button:hover {
    transform: scale(1.1);
}

.chat-human-tip {
    text-align: center;
    padding: var(--space-2) var(--space-4) var(--space-3);
    font-size: 0.75rem;
    color: var(--gray-400);
    border-top: 1px solid var(--gray-100);
}

.chat-human-tip a {
    color: var(--primary);
    font-weight: 600;
}

.chat-human-tip a:hover {
    text-decoration: underline;
}

/* 响应式 */
@media (max-width: 1024px) {
    .help-cards {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    .help-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .help-main-title {
        font-size: 1.75rem;
    }

    .help-block {
        padding: var(--space-6) var(--space-6);
    }

    /* 售后服务卡片：一行3个，高一点、宽度窄一点 */
    .help-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }
    .help-card {
        padding: 16px 10px !important;
        min-height: 140px;
    }
    .help-card-icon {
        width: 32px !important;
        height: 32px !important;
        font-size: 14px !important;
    }
    .help-card-body h4 {
        font-size: 13px !important;
    }
    .help-card-main {
        font-size: 12px !important;
    }
    .help-card-desc {
        font-size: 11px !important;
    }
    .help-card-footer {
        font-size: 10px !important;
    }

    /* 查重平台卡片：一行2个 */
    .check-grid-new {
        grid-template-columns: repeat(2, 1fr);
    }

    .chat-widget-panel {
        width: calc(100vw - 32px);
        right: 16px;
        bottom: 90px;
    }

    .chat-fab-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    .check-grid-new {
        grid-template-columns: 1fr 1fr;
    }
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--gray-900);
    color: white;
    padding: var(--space-12) 0 var(--space-6);
}

.footer-content {
    display: grid;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.footer-slogan {
    font-size: 1rem;
    color: var(--gray-400);
    margin-bottom: var(--space-4);
}

.footer-contact {
    font-size: 0.9375rem;
    color: var(--gray-400);
}

.footer-contact i {
    margin-right: var(--space-2);
    color: var(--primary-light);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: white;
}

.footer-column ul li {
    margin-bottom: var(--space-2);
}

.footer-column ul li a {
    font-size: 0.9375rem;
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-800);
    font-size: 0.875rem;
    color: var(--gray-500);
}

@media (min-width: 640px) {
    .footer-content {
        grid-template-columns: 1fr 2fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   弹窗 Modal
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--gray-200);
    flex-shrink: 0;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--gray-500);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.modal-body {
    padding: var(--space-4) var(--space-5);
    overflow-y: auto;
    flex: 1;
}

/* 登录表单 */
.form-group {
    margin-bottom: var(--space-3);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-1);
}

.form-group input {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.verify-group {
    display: flex;
    gap: var(--space-3);
}

.verify-group input {
    flex: 1;
}

.btn-verify {
    padding: var(--space-3) var(--space-4);
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.btn-verify:hover:not(:disabled) {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-verify:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-login-submit {
    width: 100%;
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.btn-login-submit:hover {
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.4);
}

.login-tips {
    text-align: center;
    margin-top: var(--space-4);
    font-size: 0.875rem;
    color: var(--gray-500);
}

.login-tips a {
    color: var(--primary);
}

/* 登录/注册切换标签 */
.auth-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: var(--space-2);
}

.auth-tab {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.auth-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.auth-tab:hover {
    color: var(--primary-light);
}

/* 推荐码输入框 */
.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-400);
    margin-top: var(--space-1);
    font-style: italic;
}

#referralCodeInput {
    background: var(--gray-50);
    border: 1px dashed var(--gray-300);
}

#referralCodeInput:focus {
    background: white;
    border-style: solid;
    border-color: var(--primary);
}

/* 分享弹窗 */
.share-info {
    text-align: center;
    margin-bottom: var(--space-6);
}

.share-highlight {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-3);
}

.share-percent {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.share-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-700);
}

.share-desc {
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.share-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.btn-share-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
}

.btn-share-action i {
    font-size: 1.5rem;
}

.btn-share-action.wechat {
    background: #07c160;
}

.btn-share-action.qq {
    background: #12b7f5;
}

.btn-share-action.poster {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.share-link-box {
    display: flex;
    gap: var(--space-3);
}

.share-link-box input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Toast 提示 */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--space-4) var(--space-6);
    background: var(--gray-900);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    z-index: 3000;
    opacity: 0;
    transition: all var(--transition-base);
}

.toast.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ============================================
   响应式优化
   ============================================ */
@media (max-width: 639px) {
    /* Hero区域整体缩小 */
    .hero {
        min-height: auto;
        padding: 80px 0 40px;
    }
    
    .hero-title {
        font-size: 1.5rem;
        margin-bottom: var(--space-2);
    }
    
    .hero-subtitle {
        font-size: 0.875rem;
        margin-bottom: var(--space-4);
    }
    
    .hero-badge {
        padding: var(--space-1) var(--space-3);
        font-size: 0.75rem;
        margin-bottom: var(--space-3);
    }
    
    .hero-buttons {
        gap: var(--space-2);
        margin-bottom: var(--space-6);
    }
    
    .hero-buttons .btn {
        padding: var(--space-2) var(--space-4);
        font-size: 0.875rem;
    }
    
    .hero-stats {
        gap: var(--space-3);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    /* 服务项目：小屏幕使用2列布局 */
    #services .services-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px;
    }
    #services .service-card {
        padding: 12px;
    }
    
    .service-card {
        padding: var(--space-3);
    }
    
    .service-icon {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
        margin-bottom: var(--space-2);
    }
    
    .service-title {
        font-size: 0.875rem;
        margin-bottom: var(--space-1);
    }
    
    .service-desc {
        font-size: 0.75rem;
        margin-bottom: var(--space-2);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .service-card .btn {
        padding: var(--space-1) var(--space-2);
        font-size: 0.75rem;
    }
    
    .promo-actions {
        grid-template-columns: 1fr;
    }
    
    .promo-link-box {
        flex-direction: column;
    }
    
    .share-actions {
        grid-template-columns: 1fr;
    }
    
    .share-link-box {
        flex-direction: column;
    }
}

/* ============================================
   SEO 内容区域样式
   ============================================ */
.seo-content {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-top: 1px solid var(--gray-200);
}

.seo-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--space-6);
    position: relative;
    display: inline-block;
}

.seo-content h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
}

.seo-content p {
    color: var(--gray-600);
    line-height: 1.8;
    font-size: 0.95rem;
    margin-bottom: var(--space-5);
}

.seo-content strong {
    color: var(--primary);
    font-weight: 600;
}

/* ============================================
   关于飞创学术 - 紧凑品牌带
   ============================================ */
.about-strip {
    padding: var(--space-16) 0;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* 团队数据统计行 */
.about-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    padding: var(--space-6) var(--space-8);
    margin-bottom: var(--space-8);
    overflow: hidden;
}

.about-stat-item {
    flex: 1;
    text-align: center;
    padding: var(--space-4) var(--space-6);
}

.about-stat-num {
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-stat-num span {
    font-size: 1.125rem;
    font-weight: 700;
}

.about-stat-label {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.about-stat-sub {
    font-size: 0.8125rem;
    color: var(--gray-400);
}

.about-stat-divider {
    width: 1px;
    height: 52px;
    background: var(--gray-200);
    flex-shrink: 0;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.about-tags span {
    display: inline-block;
    padding: 3px 10px;
    background: #eff6ff;
    color: var(--primary-dark);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
}

@media (max-width: 768px) {
    .about-stats {
        flex-wrap: wrap;
        gap: var(--space-4);
        padding: var(--space-5);
    }

    .about-stat-item {
        flex: 0 0 calc(50% - var(--space-4));
        padding: var(--space-3);
    }

    .about-stat-divider {
        display: none;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .quick-access,
    .footer,
    .modal {
        display: none;
    }
    
    section {
        padding: var(--space-6) 0;
    }
}

/* ============================================
   软件下载模块样式
   ============================================ */

/* 软件分类卡片网格 */
.software-categories-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

/* 软件分类卡片 */
.software-category-card {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-100);
    cursor: pointer;
    transition: all var(--transition-base);
}

.software-category-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.software-category-card.view-all {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border-style: dashed;
}

.software-category-card .category-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.software-category-card .category-icon i {
    font-size: 1.75rem;
    color: white;
}

.software-category-card .category-info {
    flex: 1;
}

.software-category-card .category-info h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-1);
}

.software-category-card .category-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}

.software-category-card .software-count {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.8125rem;
    color: var(--primary);
    font-weight: 600;
}

.software-category-card .category-arrow {
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

.software-category-card:hover .category-arrow {
    color: var(--primary);
    transform: translateX(4px);
}

@media (min-width: 640px) {
    .software-categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .software-categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   软件列表页面样式
   ============================================ */

/* 软件列表页面容器 */
.software-page {
    padding-top: 80px;
    min-height: 100vh;
    background: var(--gray-50);
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) 0;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.breadcrumb a {
    color: var(--gray-500);
    transition: color var(--transition-fast);
}

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

.breadcrumb span {
    color: var(--gray-700);
}

/* 分类导航标签 */
.category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.category-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-nav-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

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

.category-nav-btn .count {
    font-size: 0.75rem;
    padding: 2px 6px;
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
}

/* 软件网格 */
.software-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-5);
}

/* 软件卡片 */
.software-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 2px solid var(--gray-100);
    transition: all var(--transition-base);
    cursor: pointer;
}

.software-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.software-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
}

.software-card-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.software-card-icon i {
    font-size: 2rem;
    color: var(--primary);
}

.software-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.software-card-title {
    flex: 1;
}

.software-card-title h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-1);
}

.software-card-title .version {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.software-card-badges {
    display: flex;
    gap: var(--space-2);
}

.badge {
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-hot {
    background: #fee2e2;
    color: #dc2626;
}

.badge-new {
    background: #dbeafe;
    color: #2563eb;
}

.badge-recommend {
    background: #fef3c7;
    color: #d97706;
}

.software-card-body {
    padding: 0 var(--space-5) var(--space-5);
}

.software-card-desc {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.software-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: 0.875rem;
    color: var(--gray-500);
}

.software-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

@media (min-width: 640px) {
    .software-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .software-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   软件详情页面样式
   ============================================ */

.software-detail-page {
    padding-top: 80px;
    min-height: 100vh;
    background: var(--gray-50);
}

.software-detail-header {
    background: white;
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--gray-200);
}

.software-detail-info {
    display: flex;
    gap: var(--space-6);
    align-items: flex-start;
}

.software-detail-icon {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    flex-shrink: 0;
}

.software-detail-icon i {
    font-size: 3.5rem;
    color: var(--primary);
}

.software-detail-content {
    flex: 1;
}

.software-detail-content h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.software-detail-content .version {
    font-size: 1.125rem;
    color: var(--gray-500);
    margin-bottom: var(--space-4);
}

.software-detail-desc {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-5);
}

.software-detail-stats {
    display: flex;
    gap: var(--space-6);
}

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

.stat-item .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-item .stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* 下载区域 */
.download-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-top: var(--space-6);
    box-shadow: var(--shadow-md);
}

.download-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.download-section h3 i {
    color: var(--primary);
}

.download-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.download-item:hover {
    background: var(--gray-100);
}

.download-item-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.download-item-info i {
    font-size: 1.5rem;
    color: var(--primary);
}

.download-item-info .name {
    font-weight: 600;
    color: var(--gray-900);
}

.download-item-info .size {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.btn-download-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* 安装教程区域 */
.tutorial-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-top: var(--space-6);
    box-shadow: var(--shadow-md);
}

.tutorial-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.tutorial-section h3 i {
    color: var(--primary);
}

.tutorial-content {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
}

.tutorial-content img {
    max-width: 100%;
    border-radius: var(--radius-lg);
    margin: var(--space-4) 0;
}

.tutorial-content h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: var(--space-5) 0 var(--space-3);
}

.tutorial-content p {
    margin-bottom: var(--space-3);
}

.tutorial-content ol,
.tutorial-content ul {
    padding-left: var(--space-6);
    margin-bottom: var(--space-4);
}

.tutorial-content li {
    margin-bottom: var(--space-2);
}

/* 系统要求 */
.system-requirements {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-top: var(--space-6);
    box-shadow: var(--shadow-md);
}

.system-requirements h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.system-requirements h3 i {
    color: var(--primary);
}

.requirements-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.requirement-item {
    display: flex;
    gap: var(--space-2);
    font-size: 0.9375rem;
}

.requirement-item .label {
    color: var(--gray-500);
    min-width: 80px;
}

.requirement-item .value {
    color: var(--gray-900);
    font-weight: 500;
}

@media (max-width: 640px) {
    .software-detail-info {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .software-detail-stats {
        justify-content: center;
    }
    
    .requirements-list {
        grid-template-columns: 1fr;
    }
}

/* 解压密码提示 */
.password-hint {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: #fef3c7;
    border-radius: var(--radius-lg);
    margin-top: var(--space-4);
}

.password-hint i {
    font-size: 1.5rem;
    color: #d97706;
}

.password-hint .label {
    color: #92400e;
    font-weight: 600;
}

.password-hint .value {
    color: #d97706;
    font-weight: 700;
    font-size: 1.125rem;
}

/* ============================================
   我的飞创 - OA对接新样式
   ============================================ */

/* 用户欢迎栏 */
.user-welcome-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    padding: 14px 20px;
    margin-bottom: 20px;
    color: #fff;
}
.user-avatar-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
}
.user-avatar-wrap i { font-size: 28px; }
.user-dropdown {
    position: absolute;
    right: 20px;
    top: 70px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    min-width: 140px;
    z-index: 100;
    overflow: hidden;
    animation: dropdownIn .2s ease;
}
@keyframes dropdownIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
.user-dropdown a {
    display: block;
    padding: 12px 18px;
    color: #374151;
    text-decoration: none;
    font-size: 14px;
    transition: background .15s;
}
.user-dropdown a:hover {
    background: #fef2f2;
    color: #dc2626;
}
.user-dropdown a i { margin-right: 8px; }
.btn-logout {
    background: rgba(255,255,255,0.2);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: 8px;
    padding: 6px 14px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-logout:hover { background: rgba(255,255,255,0.35); }

/* Dashboard Tab */
.dashboard-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 0;
}
.dash-tab {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 15px;
    color: #718096;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
    border-radius: 4px 4px 0 0;
}
.dash-tab:hover { color: #667eea; }
.dash-tab.active { color: #667eea; border-bottom-color: #667eea; font-weight: 600; }

/* 绑定操作栏 */
.bind-action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f7fafc;
    border: 1px dashed #cbd5e0;
    border-radius: 10px;
    padding: 14px 18px;
    margin-bottom: 16px;
    gap: 12px;
}
.btn-bind-order {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 9px 18px;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.2s;
}
.btn-bind-order:hover { opacity: 0.88; }

/* OA订单卡片 */
.oa-order-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px 18px;
    margin-bottom: 12px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    transition: box-shadow 0.2s;
}
.oa-order-card:hover { box-shadow: 0 4px 12px rgba(102,126,234,0.15); }
.oa-order-card.oa-order-error { border-color: #feb2b2; background: #fff5f5; }

.oa-order-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}
.oa-order-no {
    font-size: 13px;
    color: #718096;
}
.oa-order-type-tag {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 20px;
}
.oa-order-status-tag.error {
    background: #fff5f5;
    color: #e53e3e;
    border: 1px solid #feb2b2;
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 20px;
}

.oa-order-title {
    font-size: 15px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 10px;
    line-height: 1.5;
}
.oa-order-meta {
    font-size: 13px;
    color: #718096;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.oa-order-meta span { display: flex; align-items: center; gap: 5px; }

/* 销售联系方式 */
.oa-sales-info {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.oa-contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 13px;
    text-decoration: none;
    transition: opacity 0.2s;
}
.oa-contact-btn.qq {
    background: #e8f4fd;
    color: #1d72b8;
    border: 1px solid #bee3f8;
}
.oa-contact-btn.wx {
    background: #f0fff4;
    color: #276749;
    border: 1px solid #9ae6b4;
}
.oa-contact-btn:hover { opacity: 0.8; }

.oa-order-actions {
    margin-top: 10px;
    text-align: right;
}
.btn-unbind {
    background: none;
    border: 1px solid #e2e8f0;
    color: #a0aec0;
    border-radius: 6px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-unbind:hover { border-color: #fc8181; color: #e53e3e; }

/* 佣金看板 */
.commission-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}
.commission-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.commission-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.commission-card.total   .commission-icon { background: #fef3c7; color: #d97706; }
.commission-card.settled .commission-icon { background: #d1fae5; color: #059669; }
.commission-card.pending .commission-icon { background: #dbeafe; color: #2563eb; }
.commission-info { display: flex; flex-direction: column; gap: 2px; }
.commission-label { font-size: 12px; color: #718096; }
.commission-value { font-size: 20px; font-weight: 700; color: #2d3748; }

/* order-empty */
.order-empty {
    text-align: center;
    padding: 40px 20px;
    color: #a0aec0;
}
.order-empty i   { font-size: 40px; margin-bottom: 12px; }
.order-empty p   { font-size: 14px; }

/* 响应式 */
@media (max-width: 600px) {
    /* 佣金看板：一行3个 */
    .commission-board { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .commission-card { padding: 10px 6px; flex-direction: column; text-align: center; gap: 6px; }
    .commission-icon { width: 28px; height: 28px; font-size: 14px; }
    .commission-label { font-size: 10px; }
    .commission-value { font-size: 14px; }
    .bind-action-bar  { flex-direction: column; align-items: flex-start; }
    .oa-order-header  { flex-direction: column; align-items: flex-start; gap: 6px; }
    .dashboard-tabs   { gap: 4px; }
    .dash-tab         { padding: 8px 12px; font-size: 14px; }
}

/* ============================================
   关于我们 - 全新设计
   包含：公司介绍、团队实力、团建活动、公司资讯、产品手册
   ============================================ */

/* 关于我们主容器 */
.about-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

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

.about-section .section-tag {
    display: inline-block;
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: #fff;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.about-section .section-title {
    font-size: 42px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 12px;
}

.about-section .section-subtitle {
    font-size: 18px;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

/* === 关于我们三卡片入口 === */
.about-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 8px;
}

.about-entry-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: #fff;
    border-radius: 20px;
    padding: 32px 28px 28px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
    text-decoration: none;
    color: inherit;
    transition: transform .25s, box-shadow .25s, border-color .25s;
    position: relative;
    overflow: hidden;
}

.about-entry-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--card-accent, #2563eb);
    border-radius: 20px 20px 0 0;
    opacity: 0;
    transition: opacity .25s;
}

.about-entry-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(37,99,235,.13);
    border-color: #bfdbfe;
}

.about-entry-card:hover::before { opacity: 1; }

.about-entry-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.about-entry-body {
    flex: 1;
    width: 100%;
}

.about-entry-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 10px;
}

.about-entry-body p {
    font-size: .92rem;
    color: #64748b;
    line-height: 1.65;
    margin: 0 0 18px;
}

.about-entry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}

.about-entry-tags span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: #f1f5f9;
    color: #475569;
    font-size: .78rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 20px;
}

.about-entry-tags i { font-size: .72rem; color: #94a3b8; }

.about-entry-arrow {
    align-self: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    font-size: .85rem;
    margin-top: 20px;
    transition: background .2s, color .2s;
}

.about-entry-card:hover .about-entry-arrow {
    background: #2563eb;
    color: #fff;
}

/* === about-cta === */
.about-cta-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 60%, #0891b2 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.about-cta-content h2 {
    font-size: 1.9rem;
    font-weight: 800;
    margin: 0 0 12px;
}

.about-cta-content p {
    font-size: 1rem;
    opacity: .85;
    margin: 0 0 28px;
}

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

/* 响应式 */
@media (max-width: 900px) {
    .about-cards-grid { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 600px) {
    .about-entry-card { padding: 24px 20px 20px; }
    .about-cta-content h2 { font-size: 1.5rem; }
    .about-cta-buttons { flex-direction: column; align-items: center; }
}

/* 公司介绍卡片 */
.about-intro-card {
    background: #fff;
    border-radius: 20px;
    padding: 50px;
    margin-bottom: 60px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.about-intro-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.about-intro-text h3 {
    font-size: 28px;
    color: #1e293b;
    margin-bottom: 24px;
    font-weight: 700;
}

.about-intro-text p {
    font-size: 15px;
    line-height: 1.8;
    color: #475569;
    margin-bottom: 20px;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 30px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: 10px;
    font-size: 14px;
    color: #334155;
}

.highlight-item i {
    color: #f59e0b;
    font-size: 18px;
}

.about-intro-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #4338ca;
    font-size: 18px;
    font-weight: 600;
}

.image-placeholder i {
    font-size: 64px;
    margin-bottom: 16px;
}

/* 团队实力数据 */
.about-stats-section {
    margin-bottom: 60px;
}

.subsection-title {
    font-size: 24px;
    color: #1e293b;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.subsection-title i {
    color: #f59e0b;
}

.about-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.about-stat-item {
    text-align: center;
    flex: 1;
}

.about-stat-num {
    font-size: 42px;
    font-weight: 700;
    color: #f59e0b;
    line-height: 1.2;
}

.about-stat-num span {
    font-size: 18px;
    font-weight: 600;
}

.about-stat-label {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin-top: 8px;
}

.about-stat-sub {
    font-size: 14px;
    color: #64748b;
    margin-top: 4px;
}

.about-stat-divider {
    width: 1px;
    height: 80px;
    background: #e2e8f0;
}

/* 发展历程时间线 */
.timeline-section {
    margin-bottom: 60px;
}

.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #f59e0b 0%, #fbbf24 100%);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    padding-bottom: 30px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 4px;
    width: 16px;
    height: 16px;
    background: #fff;
    border: 3px solid #f59e0b;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.timeline-year {
    display: inline-block;
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-content h4 {
    font-size: 18px;
    color: #1e293b;
    margin-bottom: 6px;
    font-weight: 600;
}

.timeline-content p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}

/* 团建活动区 */
.team-building-section {
    margin-bottom: 60px;
}

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

.team-building-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.team-building-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.team-building-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.team-building-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.team-building-card:hover .team-building-image img {
    transform: scale(1.1);
}

.team-building-date {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(245, 158, 11, 0.9);
    color: #fff;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.team-building-content {
    padding: 20px;
}

.team-building-content h4 {
    font-size: 16px;
    color: #1e293b;
    margin-bottom: 8px;
    font-weight: 600;
}

.team-building-content p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}

.team-building-placeholder {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #d97706;
}

.team-building-placeholder i {
    font-size: 48px;
    margin-bottom: 8px;
}

.team-building-placeholder span {
    font-size: 14px;
    font-weight: 600;
}

/* 公司资讯区 */
.company-news-section {
    margin-bottom: 60px;
}

.company-news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.company-news-card {
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    border-left: 4px solid #f59e0b;
}

.company-news-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.company-news-date {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #f59e0b;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 10px;
}

.company-news-card h4 {
    font-size: 17px;
    color: #1e293b;
    margin-bottom: 10px;
    font-weight: 600;
    line-height: 1.4;
}

.company-news-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 14px;
}

.company-news-tag {
    display: inline-block;
    background: #fef3c7;
    color: #d97706;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* 产品手册电子书区 */
.product-manual-section {
    margin-bottom: 60px;
}

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

.product-manual-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.product-manual-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.15);
}

.product-manual-cover {
    height: 140px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.product-manual-cover::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255,255,255,0.03) 10px,
        rgba(255,255,255,0.03) 20px
    );
}

.product-manual-cover i {
    font-size: 48px;
    opacity: 0.9;
}

.product-manual-content {
    padding: 20px;
}

.product-manual-content h4 {
    font-size: 15px;
    color: #1e293b;
    margin-bottom: 6px;
    font-weight: 600;
}

.product-manual-content p {
    font-size: 13px;
    color: #64748b;
    margin-bottom: 16px;
    line-height: 1.5;
}

.product-manual-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: #fff;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.product-manual-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .about-intro-content {
        grid-template-columns: 1fr;
    }
    
    .about-intro-image {
        order: -1;
    }
    
    .image-placeholder {
        max-width: 100%;
        aspect-ratio: 16/9;
    }
    
    .team-building-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-manual-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-section {
        padding: 60px 0;
    }
    
    .about-section .section-title {
        font-size: 32px;
    }
    
    .about-intro-card {
        padding: 30px;
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        flex-wrap: wrap;
        gap: 30px;
        padding: 30px;
    }
    
    .about-stat-divider {
        display: none;
    }
    
    .about-stat-item {
        flex: 0 0 calc(50% - 15px);
    }
    
    .timeline {
        padding-left: 30px;
    }

    .team-building-grid,
    .company-news-grid,
    .product-manual-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   用户下拉菜单样式
   ============================================ */

/* 用户下拉菜单容器 */
.user-dropdown {
    position: absolute;
    right: 20px;
    top: 70px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    min-width: 160px;
    z-index: 1000;
    overflow: hidden;
    animation: dropdownIn 0.2s ease;
}

/* 下拉菜单动画 */
@keyframes dropdownIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 下拉菜单项 */
.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    color: #374151;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.15s, color 0.15s;
}

.user-dropdown a:hover {
    background: #f3f4f6;
    color: #667eea;
}

.user-dropdown a i {
    font-size: 15px;
    width: 18px;
    text-align: center;
    color: #6b7280;
}

.user-dropdown a:hover i {
    color: #667eea;
}

/* 下拉菜单分隔线 */
.user-dropdown .dropdown-divider {
    height: 1px;
    background: #e5e7eb;
    margin: 6px 0;
}

/* 退出登录菜单项 */
.user-dropdown .logout-link {
    color: #ef4444;
}

.user-dropdown .logout-link:hover {
    background: #fef2f2;
    color: #dc2626;
}

.user-dropdown .logout-link i {
    color: #ef4444;
}

.user-dropdown .logout-link:hover i {
    color: #dc2626;
}

/* 移动端下拉菜单调整 */
@media (max-width: 768px) {
    .user-dropdown {
        right: 10px;
        top: 60px;
    }
}