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

:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #60A5FA;
    --primary-bg: #EFF6FF;
    --dark: #0F172A;
    --dark-2: #1E293B;
    --gray-600: #475569;
    --gray-400: #94A3B8;
    --gray-200: #E2E8F0;
    --gray-100: #F1F5F9;
    --white: #FFFFFF;
    --gradient-blue: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #2563EB 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --max-width: 1200px;
    --header-height: 72px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--dark-2);
    line-height: 1.6;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 头部导航 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-blue);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    font-size: 1.2rem;
}

.logo img { height: 40px; width: auto; display: block; }
.logo span {
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--dark-2);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 200px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(4px);
}

.dropdown-menu a {
    display: block;
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--dark-2);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.dropdown-arrow {
    font-size: 0.7rem;
    transition: var(--transition);
}

.dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

/* 右侧按钮 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-blue);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

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

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

.btn-lg {
    padding: 14px 36px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 0.85rem;
}

/* 汉堡菜单按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

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

.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);
}

/* ==================== Hero 区域 ==================== */
.hero {
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 80px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

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

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--white);
    margin-bottom: 20px;
}

.hero-content h1 span {
    background: linear-gradient(135deg, #60A5FA, #A78BFA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
    max-width: 520px;
    line-height: 1.8;
}

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

.hero-buttons .btn-primary {
    background: linear-gradient(135deg, #2563EB, #7C3AED);
}

.hero-buttons .btn-outline {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--white);
}

.hero-buttons .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat h3 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
}

.hero-stat p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0;
}

/* Hero 右侧展示 */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-mockup {
    width: 100%;
    max-width: 520px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 24px;
    backdrop-filter: blur(20px);
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mockup-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.mockup-dot:nth-child(1) { background: #EF4444; }
.mockup-dot:nth-child(2) { background: #F59E0B; }
.mockup-dot:nth-child(3) { background: #10B981; }

.mockup-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.mockup-card {
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: 16px;
    color: var(--white);
}

.mockup-card .card-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.mockup-card h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.mockup-card p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0;
}

.mockup-card-wide {
    grid-column: 1 / -1;
}

.floating-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: linear-gradient(135deg, #F59E0B, #EF4444);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ==================== 通用 Section ==================== */
.section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

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

.section-gray {
    background: var(--gray-100);
}

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

.section-dark .section-header h2 {
    color: var(--white);
}

.section-dark .section-header p {
    color: rgba(255, 255, 255, 0.6);
}

/* ==================== 软件系统 ==================== */
.software-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.software-image {
    position: relative;
}

.software-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.software-features {
    display: grid;
    gap: 24px;
}

.feature-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--primary-bg);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.feature-text h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--dark);
}

.feature-text p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==================== 模式方案 ==================== */
.models-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.model-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transition: var(--transition);
}

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

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

.model-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.model-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark);
}

.model-card p {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.6;
}

.model-card .model-tag {
    display: inline-block;
    padding: 2px 10px;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    color: #92400E;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 10px;
    margin-top: 12px;
}

/* ==================== 网站建设服务 ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

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

.service-card .service-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.service-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.service-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-card .service-list {
    text-align: left;
    padding: 0;
}

.service-card .service-list li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--dark-2);
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--gray-100);
}

.service-card .service-list li:last-child {
    border-bottom: none;
}

.service-card .service-list li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
}

/* ==================== 客户案例 ==================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.case-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-bg), #F3E8FF);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary);
}

.case-info {
    padding: 24px;
}

.case-category {
    display: inline-block;
    padding: 2px 10px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 10px;
    margin-bottom: 10px;
}

.case-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark);
}

.case-info p {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 16px;
}

.case-info .case-link {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.case-info .case-link:hover {
    gap: 8px;
}

/* ==================== 电商学院 ==================== */
.academy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.academy-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

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

.academy-card .academy-icon {
    width: 64px;
    height: 64px;
    min-width: 64px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.academy-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}


.post-list a {
    padding: 8px 12px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    color: var(--dark-2);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    gap: 6px;
}
.post-list a:hover {
    background: var(--primary-bg);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateX(4px);
}
.post-list a::before {
    content: "→";
    color: var(--primary);
    font-weight: 700;
}

.academy-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 16px;
}

.post-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.post-list a {
    font-size: 0.9rem;
    color: var(--dark-2);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.post-list a:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.post-list a::before {
    content: '📄';
    font-size: 0.85rem;
}

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

.about-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.about-content p {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.about-stat {
    text-align: center;
    padding: 20px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
}

.about-stat .number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.about-stat .label {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-top: 4px;
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    background: linear-gradient(135deg, #1E293B, #2563EB);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

/* 联系方式卡片 */
.contact-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.contact-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.contact-card .contact-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.contact-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
}

.contact-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
}

/* ==================== 新闻中心 ==================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.news-date {
    padding: 16px 20px 8px;
    font-size: 0.8rem;
    color: var(--gray-400);
}

.news-card h4 {
    padding: 0 20px;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
}

.news-card p {
    padding: 0 20px 20px;
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==================== CTA ==================== */
.cta-section {
    padding: 80px 0;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-section h2 {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
    position: relative;
}

.cta-section p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
    position: relative;
}

.cta-section .btn-primary {
    background: linear-gradient(135deg, #F59E0B, #EF4444);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4);
    font-size: 1.1rem;
    padding: 16px 40px;
    position: relative;
}

.cta-section .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(239, 68, 68, 0.5);
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo img { height: 40px; width: auto; filter: brightness(10); }
.footer-brand .logo {
    color: var(--white);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.8;
    max-width: 300px;
}

.footer-col h5 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-col a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    padding: 6px 0;
    transition: var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.3);
}

/* ==================== 响应式 - 平板 ==================== */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==================== 响应式 - 手机 ==================== */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        opacity: 0;
        transition: var(--transition);
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-menu > li > a {
        padding: 14px 16px;
        border-bottom: 1px solid var(--gray-100);
    }

    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        padding-left: 16px;
        display: none;
    }

    .dropdown.active .dropdown-menu {
        display: block;
    }

    .header-actions .btn {
        display: none;
    }

    .header-actions .btn-sm {
        display: inline-flex;
    }

    /* Hero */
    .hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + 20px);
        padding-bottom: 40px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

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

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

    .hero-visual {
        display: none;
    }

    /* Sections */
    .section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    /* Software */
    .software-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* Models */
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .model-card {
        padding: 20px 16px;
    }

    .model-card h4 {
        font-size: 0.9rem;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* Cases */
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* Academy */
    .academy-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .academy-card {
        flex-direction: column;
        padding: 24px;
    }

    /* About */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .contact-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* News */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .cta-section h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .models-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero-content h1 {
        font-size: 1.5rem;
    }
    .hero-stats {
        flex-direction: column;
        gap: 12px;
    }
}

/* Top tagline bar */
.top-tagline { background: linear-gradient(135deg, #1E293B, #334155); color: rgba(255,255,255,0.85); text-align: center; padding: 6px 0; font-size: 0.82rem; letter-spacing: 1px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.top-tagline span { color: #F59E0B; font-weight: 700; }

/* Footer QR code section */
.footer-qr { display: flex; gap: 20px; margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.08); }
.footer-qr-item { text-align: center; flex: 1; }
.footer-qr-item img { width: 110px; height: 110px; border-radius: 8px; border: 2px solid rgba(255,255,255,0.1); display: block; margin: 0 auto 8px; }
.footer-qr-item p { font-size: 0.78rem; color: rgba(255,255,255,0.5); margin: 0; }
.footer-qr-item .qr-label { font-size: 0.85rem; color: rgba(255,255,255,0.7); font-weight: 600; margin-bottom: 8px; }