/* 公共样式 - Header 和 Footer */

/* ===== Container ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-header h2 {
    font-size: var(--font-size-h2);
    color: var(--color-dark);
    margin-bottom: var(--spacing-base);
}

.section-header p {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 页面标题区 - 通用 ===== */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    padding: 100px var(--spacing-lg) 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

.page-header h1 {
    font-size: 56px;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
    letter-spacing: -1px;
}

.page-header p {
    font-size: 20px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    font-weight: var(--font-weight-semibold);
}

/* ===== 页面标题区 - 页面差异化 ===== */
.page-header-products {
    background: linear-gradient(135deg, #0052A3 0%, var(--color-primary) 50%, var(--color-accent) 100%);
}

.page-header-services {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0052A3 50%, var(--color-accent) 100%);
}

.page-header-cases {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 50%, #0052A3 100%);
}

.page-header-news {
    background: linear-gradient(135deg, #0052A3 0%, var(--color-accent) 50%, var(--color-primary) 100%);
}

.page-header-contact {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, #0052A3 100%);
}

/* ===== Header 导航 ===== */
.header {
    background: var(--color-white);
    border-bottom: 2px solid var(--color-light);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    height: auto;
    min-height: 80px;
}

/* Logo */
.logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    line-height: 1;
    text-decoration: none;
}

.logo-img {
    height: 50px;
    width: auto;
    max-width: 180px;
    display: block;
    transition: transform var(--transition-fast);
}

.logo a:hover .logo-img {
    transform: scale(1.05);
}

/* 导航菜单 */
.nav-menu {
    flex: 1;
    margin-left: var(--spacing-4xl);
}

.nav-menu > ul {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

.nav-menu a {
    color: var(--color-dark);
    font-size: 15px;
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-lg) var(--spacing-base);
    transition: all var(--transition-fast);
    position: relative;
    display: inline-block;
}

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

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px 2px 0 0;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    transform: scaleX(1);
    transform-origin: left;
}

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

.dropdown-arrow {
    display: inline-block;
    margin-left: 6px;
    font-size: 11px;
    transition: transform var(--transition-fast);
    transform-origin: center;
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    border: 1px solid var(--color-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-base) 0;
    min-width: 180px;
    box-shadow: var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    margin-top: var(--spacing-lg);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-base) var(--spacing-lg);
    color: var(--color-dark);
    font-size: var(--font-size-small);
}

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

/* 头部操作按钮 */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-shrink: 0;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    padding: var(--spacing-base);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 1px;
    transition: all var(--transition-fast);
}

/* ===== Footer ===== */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-4xl) 0 var(--spacing-base);
    margin-top: var(--spacing-5xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-base);
}

.footer-section a {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-section p {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-base);
    line-height: 1.5;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-tiny);
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: var(--spacing-2xl);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

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

/* ===== 辅助元素 ===== */

/* 浮动咨询按钮 */
.floating-contact {
    position: fixed;
    right: var(--spacing-lg);
    bottom: var(--spacing-lg);
    z-index: 99;
}

#floatingContact {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #0d2b5e;
    color: var(--color-white);
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-heavy);
    animation: float 3s ease-in-out infinite;
    transition: all var(--transition-fast);
}

#floatingContact img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

#floatingContact:hover {
    background: #0b2450;
    transform: scale(1.1);
    box-shadow: 0 8px 32px rgba(0, 102, 204, 0.3);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    right: var(--spacing-lg);
    bottom: calc(var(--spacing-lg) + 76px);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: #0d2b5e;
    color: var(--color-white);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 98;
}

.back-to-top img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: #0b2450;
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

/* ===== CTA 行动召唤区（通用） ===== */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    padding: var(--spacing-5xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -100px;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.cta-section::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -100px;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite 1s;
}

.cta-decoration {
    position: absolute;
    border-radius: 50%;
    opacity: 0.05;
    animation: pulse 4s ease-in-out infinite;
}

.cta-deco-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 5%;
    border: 2px solid var(--color-white);
    animation-delay: 0s;
}

.cta-deco-2 {
    width: 200px;
    height: 200px;
    bottom: 15%;
    right: 10%;
    border: 2px solid var(--color-white);
    animation-delay: 1s;
}

.cta-deco-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    right: 5%;
    border: 2px solid var(--color-white);
    animation-delay: 2s;
}

.cta-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.cta-main h2 {
    font-size: 48px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    font-weight: var(--font-weight-bold);
}

.cta-main p {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.cta-section .btn-primary {
    background-color: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
    position: relative;
    overflow: hidden;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.5px;
}

.cta-section .btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    transition: left var(--transition-base);
    z-index: -1;
}

.cta-section .btn-primary:hover::before {
    left: 0;
}

.cta-section .btn-primary:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
    box-shadow: 0 12px 40px rgba(0, 102, 204, 0.3);
    transform: translateY(-3px);
}

.cta-section .btn-secondary {
    border: 2px solid var(--color-white);
    color: var(--color-white);
    background: transparent;
}

.cta-section .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: var(--color-white);
    color: var(--color-white);
}

.cta-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.cta-feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: var(--spacing-base);
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.06) 100%);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
    min-height: 120px;
}

.cta-feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cta-feature-item:nth-child(1) {
    border-top: 2px solid rgba(255, 255, 255, 0.4);
    border-left: 2px solid rgba(255, 255, 255, 0.4);
}

.cta-feature-item:nth-child(2) {
    border-top: 2px solid rgba(255, 255, 255, 0.4);
    border-right: 2px solid rgba(255, 255, 255, 0.4);
}

.cta-feature-item:nth-child(3) {
    border-bottom: 2px solid rgba(255, 255, 255, 0.4);
    border-left: 2px solid rgba(255, 255, 255, 0.4);
}

.cta-feature-item:nth-child(4) {
    border-bottom: 2px solid rgba(255, 255, 255, 0.4);
    border-right: 2px solid rgba(255, 255, 255, 0.4);
}

.cta-feature-item:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.12) 100%);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transform: translateY(-8px);
}

.cta-feature-item:nth-child(1):hover {
    transform: translateY(-8px) translateX(-4px);
}

.cta-feature-item:nth-child(2):hover {
    transform: translateY(-8px) translateX(4px);
}

.cta-feature-item:nth-child(3):hover {
    transform: translateY(-8px) translateX(-4px);
}

.cta-feature-item:nth-child(4):hover {
    transform: translateY(-8px) translateX(4px);
}

.cta-feature-item:hover::before {
    opacity: 1;
}

.cta-feature-icon {
    width: 0;
    height: 0;
    display: none;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.cta-feature-item:hover .cta-feature-icon {
    display: none;
}

.cta-feature-text h4 {
    font-size: 28px;
    margin-bottom: 6px;
    color: var(--color-white);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.5px;
}

.cta-feature-text span {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.85);
    font-weight: var(--font-weight-semibold);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.05;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 图标字符通过 CSS 注入，避免写入 HTML */
.icon-globe::before { content: '🌐'; }
.icon-world::before { content: '🌍'; }
.icon-rocket::before { content: '🚀'; }
.icon-people::before { content: '👥'; }
.icon-video::before { content: '🎬'; }
.icon-robot::before { content: '🤖'; }
.icon-chart::before { content: '📊'; }
.icon-target::before { content: '🎯'; }
.icon-bolt::before { content: '⚡'; }
.icon-bulb::before { content: '💡'; }
.icon-growth::before { content: '📈'; }
.icon-graduation::before { content: '🎓'; }
.icon-phone::before { content: '📱'; }
.icon-mic::before { content: '🎙️'; }
.icon-chat::before { content: '💬'; }
.icon-sparkles::before { content: '✨'; }
.icon-money::before { content: '💰'; }
.icon-stopwatch::before { content: '⏱️'; }
.icon-search::before { content: '🔍'; }
.icon-gear::before { content: '⚙️'; }
.icon-check::before { content: '✅'; }
.icon-location::before { content: '📍'; }
.icon-call::before { content: '📞'; }
.icon-mail::before { content: '✉️'; }
.icon-clock::before { content: '🕒'; }