/* ============================================
   华影嘉禾官方企业官网 - 全局样式
   深空蓝 + 活力橙 高级影视风
   ============================================ */

/* CSS 变量定义 */
:root {
    /* 主色调 - 深空蓝 */
    --color-bg: #0f1419;
    --color-bg-secondary: #151c24;
    --color-card: #1a2028;
    --color-card-hover: #232b36;
    --color-border: #2a3340;
    --color-border-light: #3a4554;

    /* 文字色 */
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0aec0;
    --color-text-muted: #6b7c8f;

    /* 品牌点缀色 - 活力橙 */
    --color-accent: #ff6b35;
    --color-accent-light: #ff8c5e;
    --color-accent-dark: #e55a2b;
    --color-accent-secondary: #4ecdc4;

    /* 功能色 */
    --color-success: #4caf50;
    --color-overlay: rgba(0, 0, 0, 0.6);

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* 容器宽度 */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
    list-style: none;
}

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

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

/* 通用区块 */
section {
    padding: var(--spacing-xl) 0;
}

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

.section-header .label {
    display: inline-block;
    color: var(--color-accent);
    font-size: 0.875rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.section-header .subtitle {
    color: var(--color-text-secondary);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: #000;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    background: rgba(10, 10, 10, 0.95);
}

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

.navbar .logo {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-text-primary);
}

.navbar .logo .logo-mark {
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.navbar .logo .logo-sub {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    font-weight: 400;
    display: block;
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

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

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

/* 汉堡菜单按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 20px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    letter-spacing: 1px;
}

.footer-col .footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.footer-col p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col ul li a {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-col ul li a:hover {
    color: var(--color-accent);
}

.footer-brand-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
}

.footer-brand-tags span {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.footer-bottom a {
    color: var(--color-text-muted);
}

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

.footer-bottom .divider {
    margin: 0 0.5rem;
    color: var(--color-border-light);
}

/* ============================================
   首页 Hero 区
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #0a0a0a 0%, #0f1419 50%, #0a0a0a 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

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

.hero .hero-label {
    display: inline-block;
    color: var(--color-accent);
    font-size: 0.9rem;
    letter-spacing: 3px;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: 2px;
}

.hero h1 .highlight {
    color: var(--color-accent);
}

.hero .hero-slogan {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.hero .hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.hero .hero-tags span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-border-light);
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.02);
}

.hero .hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ============================================
   品牌矩阵
   ============================================ */
.brands-section {
    background: var(--color-bg-secondary);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.brand-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.brand-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), transparent);
    opacity: 0;
    transition: var(--transition);
}

.brand-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent);
    background: var(--color-card-hover);
}

.brand-card:hover::before {
    opacity: 1;
}

.brand-card.primary {
    border-color: var(--color-accent-dark);
    background: linear-gradient(160deg, #1a2028 0%, var(--color-card) 100%);
}

.brand-card.primary::before {
    opacity: 1;
}

.brand-card .brand-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(255, 107, 53, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(255, 107, 53, 0.2);
}

.brand-card .brand-badge {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--color-accent);
    background: rgba(255, 107, 53, 0.1);
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.brand-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.brand-card .brand-en {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.brand-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ============================================
   业务板块卡片
   ============================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition);
    position: relative;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    background: var(--color-card-hover);
}

.service-card .service-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: rgba(255, 107, 53, 0.15);
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    line-height: 1;
}

.service-card .service-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: rgba(255, 107, 53, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(255, 107, 53, 0.2);
}

.service-card .service-tag {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 1px;
}

.service-card h3 {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-sm);
    padding-right: 2rem;
}

.service-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.service-card.highlight {
    border-color: var(--color-accent-dark);
    background: linear-gradient(160deg, #1a2028 0%, var(--color-card) 100%);
}

/* ============================================
   通用内容区块
   ============================================ */
.content-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.content-split.reverse .content-text {
    order: 2;
}

.content-split .content-text h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.content-split .content-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.content-split .content-visual {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a1a, #222);
    border: 1px solid var(--color-border);
}

.content-split .content-visual .visual-inner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, rgba(255, 107, 53, 0.1), transparent 70%);
}

.content-split .content-visual .visual-icon {
    font-size: 4rem;
    color: var(--color-accent);
    opacity: 0.6;
}

/* 数据统计 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    text-align: center;
}

.stat-item .stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.stat-item .stat-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   页面 Banner（内页）
   ============================================ */
.page-banner {
    padding: calc(72px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: linear-gradient(135deg, #0a0a0a 0%, #0f1419 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 50% 50%, rgba(255, 107, 53, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.page-banner .container {
    position: relative;
    z-index: 1;
}

.page-banner h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 2px;
}

.page-banner p {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.page-banner .breadcrumb {
    margin-top: var(--spacing-md);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

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

.page-banner .breadcrumb span {
    margin: 0 0.5rem;
}

/* ============================================
   项目案例
   ============================================ */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.case-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.case-card .case-thumb {
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, #1a1a1a, #222);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--color-accent);
    position: relative;
    overflow: hidden;
}

.case-card .case-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
}

.case-card .case-body {
    padding: var(--spacing-md);
}

.case-card .case-category {
    font-size: 0.75rem;
    color: var(--color-accent-secondary);
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.case-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.case-card p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   联系表单
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-lg);
}

.contact-info-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    align-items: flex-start;
}

.contact-info-item .info-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-info-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-info-item p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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

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

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

/* ============================================
   响应式适配
   ============================================ */
@media (max-width: 1024px) {
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .content-split {
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 4rem;
        --spacing-lg: 2.5rem;
        --spacing-md: 1.5rem;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    /* 移动端导航 */
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-150%);
        transition: var(--transition);
        z-index: 999;
    }

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

    .nav-link {
        font-size: 1rem;
        padding: var(--spacing-xs) 0;
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-link::after {
        display: none;
    }

    /* 移动端网格 */
    .brands-grid,
    .services-grid,
    .cases-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .content-split {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .content-split.reverse .content-text {
        order: 0;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .hero .hero-buttons .btn {
        width: 100%;
    }

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

    .footer-bottom .divider {
        display: block;
        margin: 0.25rem 0;
    }
}

@media (max-width: 480px) {
    .navbar .logo {
        font-size: 1.05rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }
}

/* ============================================
   高端图标样式（几何符号替代emoji）
   ============================================ */
.brand-card .brand-icon,
.service-card .service-icon {
    font-family: "Segoe UI Symbol", "Apple Color Emoji", "Noto Sans Symbols", sans-serif;
    font-weight: 300;
    line-height: 1;
    position: relative;
}

.brand-card .brand-icon::after,
.service-card .service-icon::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: inherit;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}

.brand-card:hover .brand-icon::after,
.service-card:hover .service-icon::after {
    opacity: 1;
}

/* 视觉区域图标 */
.content-visual .visual-icon {
    font-family: "Segoe UI Symbol", sans-serif;
    font-weight: 200;
    text-shadow: 0 0 40px rgba(255, 107, 53, 0.3);
}

/* 案例缩略图图标 */
.case-card .case-thumb {
    font-family: "Segoe UI Symbol", sans-serif;
    font-weight: 200;
    background: linear-gradient(135deg, #1a1a1a 0%, #232b36 100%);
}

/* 统计图标 */
.stat-item .stat-number {
    font-family: "Segoe UI Symbol", sans-serif;
}

/* 联系信息图标 */
.contact-info-item .info-icon {
    font-family: "Segoe UI Symbol", sans-serif;
}