/* ========================================
   CSS 变量和全局样式
   ======================================== */

:root {
    /* 品牌色彩 - 钰诚文化传媒 */
    --color-primary: #8B4513;          /* 主色-深褐：稳重、信赖、扎根 */
    --color-primary-hover: #6B3410;
    --color-primary-active: #4D250B;
    --color-secondary: #D4A574;         /* 主色-砂金：创意、温暖、人文 */
    --color-secondary-hover: #C08D5A;
    --color-secondary-active: #A07842;
    --color-accent: #1A5276;            /* 强调-科技蓝：AI、创新、专业 */
    --color-accent-hover: #153D5A;
    --color-accent-active: #0F2D42;
    
    --color-success: #16a34a;
    --color-error: #dc2626;
    --color-warning: #f59e0b;
    
    --color-bg: #FFFFFF;
    --color-bg-alt: #F5F5F0;          /* 辅助-浅灰：背景底色 */
    --color-text: #2C2C2A;             /* 辅助-深灰：正文字体色 */
    --color-text-light: #888780;         /* 辅助-中灰：次要信息 */
    --color-border: #E5E5E0;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* 字体 */
    --font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-en: "Montserrat", "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* 圆角 */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(26, 58, 92, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(26, 58, 92, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(26, 58, 92, 0.1);
    
    /* 过渡动画 */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ========================================
   全局重置和基础样式
   ======================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 跳过导航链接 - 无障碍访问 */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-md);
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   头部导航
   ======================================== */

.header {
    background: var(--color-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo a {
    text-decoration: none;
    color: var(--color-text);
}

.logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
}
.logo-img {
    height: 42px;
    width: auto;
    display: block;
}

/* 桌面端导航 */
.nav-desktop {
    display: block;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: inline-block;
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

.nav-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.nav-link:active {
    color: var(--color-primary-active);
    transform: scale(0.98);
}

/* 汉堡菜单按钮 - 最小44x44px触控区域 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    min-height: 44px;
    min-width: 44px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--color-bg-alt);
}

.menu-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    position: relative;
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

/* 汉堡菜单激活状态 */
.menu-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* 移动端导航 */
.nav-mobile {
    display: none;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
}

.nav-mobile.active {
    display: block;
    animation: slideDown var(--transition-base);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-list-mobile {
    list-style: none;
}

.nav-link-mobile {
    display: block;
    text-decoration: none;
    color: var(--color-text);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.nav-link-mobile:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

/* ========================================
   主要内容区域
   ======================================== */

.main-content {
    min-height: calc(100vh - 200px);
}

/* 首页横幅 */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    animation: slideUp var(--transition-slow) 0.2s backwards;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    animation: slideUp var(--transition-slow) 0.4s backwards;
}

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

/* 通用段落样式 */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-primary);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

/* 关于我们 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

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

/* 服务项目 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.service-card:focus-within {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.service-description {
    color: var(--color-text-light);
}

/* ========================================
   表单样式
   ======================================== */

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.required {
    color: var(--color-error);
    margin-left: 2px;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    min-height: 44px; /* 最小触控区域 */
}

.form-input:hover {
    border-color: var(--color-secondary);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.15);
}

.form-input.error {
    border-color: var(--color-error);
}

.form-input.success {
    border-color: var(--color-success);
}

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

.error-message {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.error-message::before {
    content: '⚠';
    font-size: var(--font-size-base);
}

/* ========================================
   按钮样式
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px; /* 最小触控区域 */
    min-width: 44px;
    font-family: var(--font-family);
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-primary:active {
    background: var(--color-primary-active);
    transform: translateY(0);
}

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

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

.btn-submit {
    width: 100%;
    margin-top: var(--spacing-md);
}

/* ========================================
   加载状态和骨架屏
   ======================================== */

.loading-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 骨架屏 */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-alt) 25%,
        var(--color-border) 50%,
        var(--color-bg-alt) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-image {
    width: 100%;
    height: 300px;
}

/* 成功状态 */
.success-state {
    text-align: center;
    padding: var(--spacing-2xl);
    animation: fadeIn var(--transition-base);
}

.success-icon {
    width: 60px;
    height: 60px;
    background: var(--color-success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin: 0 auto var(--spacing-md);
}

/* ========================================
   模态框
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
    animation: fadeIn var(--transition-fast);
}

.modal-content {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: scaleIn var(--transition-base);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-content h3 {
    margin-bottom: var(--spacing-md);
}

.modal-content p {
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-light);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ========================================
   页脚
   ======================================== */

.footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer-content p {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   响应式设计 - 断点
   ======================================== */

/* 320px - 小手机 */
@media (max-width: 374px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-section {
        padding: var(--spacing-xl) 0;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
}

/* 375px - 手机 */
@media (min-width: 375px) and (max-width: 767px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* 768px - 平板 */
@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-mobile {
        display: none;
    }
    
    .nav-mobile.active {
        display: block;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
}

/* 769px - 1023px - 小平板/大手机横屏 */
@media (min-width: 769px) and (max-width: 1023px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 1024px - 小桌面 */
@media (min-width: 1024px) and (max-width: 1439px) {
    .container {
        max-width: 960px;
    }
}

/* 1440px - 大桌面 */
@media (min-width: 1440px) {
    .container {
        max-width: 1200px;
    }
}

/* ========================================
   无障碍访问增强
   ======================================== */

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #0000ee;
        --color-text: #000000;
        --color-bg: #ffffff;
        --color-border: #000000;
    }
    
    .form-input,
    .btn {
        border: 2px solid var(--color-text);
    }
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 焦点样式增强 */
:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 屏幕阅读器专用 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ========================================
   页面标题区
   ======================================== */

.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

/* ========================================
   首页额外样式
   ======================================== */

/* Hero按钮组 */
.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    animation: slideUp var(--transition-slow) 0.6s backwards;
}

.btn-secondary-white {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary-white:hover {
    background: white;
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 服务链接 */
.service-link {
    display: inline-block;
    margin-top: var(--spacing-md);
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.service-link:hover {
    color: var(--color-accent-hover);
    transform: translateX(5px);
}

/* 左侧标题 */
.section-title-left {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.section-title-left::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-primary);
    margin: var(--spacing-md) 0 0;
    border-radius: 2px;
}

/* 关于我们首页 */
.about-motto {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    font-weight: 600;
    margin-top: var(--spacing-lg);
}

.about-image-placeholder {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-lg);
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xl);
}

.about-image-placeholder small {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    margin-top: var(--spacing-sm);
}

/* 案例网格 - 首页 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.case-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.case-image {
    height: 200px;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
}

.placeholder-image {
    background: var(--color-bg-alt);
    height: 100%;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
}

.case-info {
    padding: var(--spacing-lg);
}

.case-tag {
    display: inline-block;
    background: var(--color-bg-alt);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.case-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.case-description {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* CTA区域 */
.cta-section {
    background: var(--color-bg-alt);
    padding: var(--spacing-2xl) 0;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

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

/* ========================================
   关于我们页面样式
   ======================================== */

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.content-text {
    padding: var(--spacing-md);
}

.brand-story-text {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: var(--font-size-base);
}

.brand-story-highlight {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-top: var(--spacing-lg);
}

.content-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.placeholder-image-large {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xl);
    border-radius: var(--radius-lg);
}

.placeholder-image-large small {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    margin-top: var(--spacing-sm);
}

/* 企业文化 */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.culture-card {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.culture-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.culture-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.culture-text {
    color: var(--color-text-light);
    line-height: 1.6;
}

.culture-values {
    list-style: none;
    text-align: left;
    margin-top: var(--spacing-md);
}

.culture-values li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.culture-values li:last-child {
    border-bottom: none;
}

/* SLOGAN区域 */
.slogan-section {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.slogan-text {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.slogan-text-en {
    font-size: var(--font-size-xl);
    color: var(--color-accent);
    font-family: var(--font-family-en);
}

/* 公司简介 */
.about-intro {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.about-intro p {
    margin-bottom: var(--spacing-md);
}

.about-intro-highlight {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-secondary);
    font-size: var(--font-size-lg);
    margin-top: var(--spacing-lg);
}

/* 团队介绍 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.team-card {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.placeholder-card {
    background: var(--color-bg-alt);
    border: 2px dashed var(--color-border);
}

.team-avatar {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.team-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.team-role {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ========================================
   服务项目页面样式
   ======================================== */

.service-detail {
    padding: var(--spacing-2xl) 0;
}

.service-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.service-detail-grid.reverse {
    direction: rtl;
}

.service-detail-grid.reverse > * {
    direction: ltr;
}

.service-detail-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.service-detail-text {
    padding: var(--spacing-md);
}

.service-detail-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.service-detail-desc {
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.service-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.service-features li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ========================================
   案例展示页面样式
   ======================================== */

/* 筛选按钮 */
.cases-filter {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    min-height: 44px;
}

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

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

.filter-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 案例网格 - 完整版 */
.cases-grid-full {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

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

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

.case-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.case-image-full {
    height: 250px;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
}

.case-info-full {
    padding: var(--spacing-lg);
}

.case-title-full {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.case-description-full {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.case-view-more {
    display: inline-block;
    margin-top: var(--spacing-md);
    color: var(--color-accent);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.case-card-full:hover .case-view-more {
    color: var(--color-accent-hover);
}

/* 案例即将上线 */
.cases-coming-soon {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.cases-coming-soon p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   联系我们页面样式
   ======================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info {
    background: var(--color-bg-alt);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.contact-info-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    font-size: 2rem;
    min-width: 50px;
    text-align: center;
}

.contact-detail h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.contact-detail p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.contact-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

/* 地图占位 */
.map-placeholder {
    background: var(--color-bg);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    margin-top: var(--spacing-lg);
}

/* 表单包装器 */
.contact-form-wrapper {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.form-subtitle {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* 下拉选择 */
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    min-height: 44px;
    background: var(--color-bg);
    cursor: pointer;
}

.form-select:hover {
    border-color: var(--color-secondary);
}

.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.15);
}

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

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

.faq-question {
    padding: var(--spacing-lg);
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: var(--spacing-2xl);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

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

.faq-question::after {
    content: '+';
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-light);
    line-height: 1.8;
}

.faq-answer a {
    color: var(--color-accent);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* ========================================
   页脚样式
   ======================================== */

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-section h4 {
    font-size: var(--font-size-base);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

/* ========================================
   响应式设计 - 新增样式
   ======================================== */

/* 768px - 平板 */
@media (max-width: 768px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .service-detail-grid {
        grid-template-columns: 1fr;
    }

    .service-detail-grid.reverse {
        direction: ltr;
    }

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

    .cases-grid-full {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* 320px - 小手机 */
@media (max-width: 374px) {
    .page-title {
        font-size: var(--font-size-2xl);
    }

    .page-subtitle {
        font-size: var(--font-size-base);
    }

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

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

    .cases-filter {
        flex-direction: column;
    }
}

/* ========================================
   新版页面通用组件（跨页面共享）
   ======================================== */

/* --- 页面横幅 --- */
.page-banner {
    background: linear-gradient(135deg, #0F2D42 0%, #1A3A5C 40%, #8B4513 80%, #1A5276 100%);
    padding: 7rem 0 4rem;
    text-align: center;
    color: #fff;
    position: relative;
}
.page-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(212,165,116,0.12) 0%, transparent 60%);
    pointer-events: none;
}
.page-banner .banner-label {
    display: inline-block;
    color: #D4A574;
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}
.page-banner .banner-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 0.8rem;
    letter-spacing: 0.02em;
}
.page-banner .banner-subtitle {
    font-size: 1.1rem;
    opacity: 0.8;
    font-weight: 300;
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.7;
}

/* --- Section Header（页面内区块标题） --- */
.sh-label {
    display: inline-block;
    color: var(--color-secondary);
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}
.sh-heading {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.6rem;
}
.sh-desc {
    font-size: 1rem;
    color: var(--color-text-light);
    max-width: 540px;
    line-height: 1.7;
}

/* --- 通用按钮 --- */
.btn-brand {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: 0.03em;
    border: none;
    cursor: pointer;
}
.btn-brand:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(26,58,92,0.25);
}
.btn-brand-gold {
    display: inline-block;
    background: var(--color-secondary);
    color: #fff;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: 0.03em;
    border: none;
    cursor: pointer;
}
.btn-brand-gold:hover {
    background: #E0B988;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(212,165,116,0.35);
}
.btn-outline-light {
    display: inline-block;
    background: transparent;
    color: #fff;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: 1.5px solid rgba(255,255,255,0.4);
    transition: all 0.3s ease;
    letter-spacing: 0.03em;
}
.btn-outline-light:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.08);
    transform: translateY(-2px);
}

/* --- 图片占位 --- */
.placeholder-visual {
    width: 100%;
    height: 100%;
    min-height: 320px;
    background: linear-gradient(135deg, #0F2D42, #1A3A5C, #8B4513, #1A5276);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}
.placeholder-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 60% 40%, rgba(212,165,116,0.15) 0%, transparent 60%);
}

/* --- CTA 区块 --- */
.cta-block {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    padding: 4.5rem 0;
    text-align: center;
    color: #fff;
}
.cta-block h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    margin-bottom: 0.8rem;
}
.cta-block p {
    font-size: 1.05rem;
    opacity: 0.85;
    margin-bottom: 1.8rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* --- 双栏布局 --- */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
    align-items: center;
}
.split-visual {
    min-height: 380px;
    border-radius: 10px;
    overflow: hidden;
}
.split-text h2 {
    font-size: clamp(1.5rem, 2.8vw, 2rem);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.3;
}
.split-text .lead {
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 1rem;
}
.split-text p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 0.8rem;
}

/* --- 引用块 --- */
.quote-block {
    background: #F7F5F0;
    border-left: 4px solid var(--color-secondary);
    padding: 1.2rem 1.5rem;
    margin: 1.5rem 0;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1.05rem;
    border-radius: 0 8px 8px 0;
}

/* --- 灰度间隔 --- */
.section-pad {
    padding: 5rem 0;
}
.section-pad-sm {
    padding: 4rem 0;
}
.bg-light {
    background: #F7F5F0;
}
.bg-white {
    background: #fff;
}

/* --- 瀑布卡片 --- */
.cards-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.cards-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.feature-card {
    background: #fff;
    border-radius: 8px;
    padding: 2rem 1.5rem;
    border: 1px solid #EBE8E0;
    transition: all 0.35s ease;
    text-align: center;
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.06);
    border-color: var(--color-secondary);
}
.feature-icon {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}
.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.feature-card p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* --- 联系人卡片 --- */
.contact-info-card {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    border: 1px solid #EBE8E0;
    transition: all 0.3s ease;
}
.contact-info-card:hover {
    border-color: var(--color-secondary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}
.ci-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: #F7F5F0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ci-text h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}
.ci-text p {
    font-size: 0.88rem;
    color: var(--color-text-light);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .split-layout { grid-template-columns: 1fr; gap: 2rem; }
    .cards-grid-3 { grid-template-columns: 1fr; }
    .cards-grid-4 { grid-template-columns: 1fr; }
    .split-visual { min-height: 260px; }
    .page-banner { padding: 5.5rem 0 3rem; }
}

/* ========================================
   导航栏 - 透明/实色切换
   ======================================== */

.header-transparent {
    background: transparent;
    box-shadow: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: all 0.3s ease;
}
.header-transparent .logo h1 {
    color: #fff;
}
.header-transparent .nav-link {
    color: rgba(255,255,255,0.85);
}
.header-transparent .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.1);
}
.header-transparent .nav-link.active {
    color: #D4A574;
}
.header-transparent .menu-toggle .hamburger,
.header-transparent .menu-toggle .hamburger::before,
.header-transparent .menu-toggle .hamburger::after {
    background: #fff;
}

.header-solid {
    background: #fff;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    position: fixed;
}
.header-solid .logo h1 {
    color: var(--color-text);
}
.header-solid .nav-link {
    color: var(--color-text);
}
.header-solid .nav-link:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}
.header-solid .nav-link.active {
    color: var(--color-primary);
}
.header-solid .menu-toggle .hamburger,
.header-solid .menu-toggle .hamburger::before,
.header-solid .menu-toggle .hamburger::after {
    background: var(--color-text);
}

/* ========================================
   新版页脚
   ======================================== */

.footer-new {
    background: #1A1E24;
    color: rgba(255,255,255,0.75);
    padding: 3.5rem 0 1.5rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}
.footer-brand h3 {
    color: #fff;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}
.footer-slogan {
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 0.8rem;
}
.footer-desc {
    font-size: 0.88rem;
    line-height: 1.7;
    opacity: 0.7;
}
.footer-links-col h4,
.footer-contact h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 1rem;
    font-weight: 600;
}
.footer-links-col ul {
    list-style: none;
}
.footer-links-col li {
    margin-bottom: 0.5rem;
}
.footer-links-col a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color 0.2s;
}
.footer-links-col a:hover {
    color: var(--color-secondary);
}
.footer-contact p {
    font-size: 0.88rem;
    margin-bottom: 0.5rem;
    opacity: 0.7;
}
.footer-bottom-new {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    opacity: 0.5;
}
.footer-bottom-new a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
}
.footer-bottom-new a:hover {
    color: var(--color-secondary);
}

/* ========================================
   打印样式 - 更新
   ======================================== */

@media print {
    .page-header,
    .cta-section,
    .cases-filter,
    .faq-list {
        display: block !important;
    }
}