/**
 * 海芯威视官网 - 主样式文件
 * ========================
 * 设计理念：赛博未来主义 × 实验室精密美学
 * 色彩方案：浅色背景 + 科技蓝强调色
 * 技术栈：原生CSS3，Flexbox + Grid布局
 */

/* ========================
   CSS变量定义
   ======================== */
:root {
    /* 主色调 - 科技蓝 */
    --color-primary: #0066ff;
    --color-primary-dark: #0052cc;
    --color-primary-light: #3385ff;
    --color-primary-gradient-start: #00d4ff;
    --color-primary-gradient-end: #0066ff;
    
    /* 辅助色 */
    --color-secondary: #00c6ff;
    --color-accent: #00ff88;
    
    /* 中性色 */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-dark: #0f172a;
    
    /* 文字色 */
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-tertiary: #94a3b8;
    --color-text-light: #ffffff;
    
    /* 边框色 */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    /* 状态色 */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* 玻璃态效果 */
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    /* 字体 */
    --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    
    /* 字号 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* 行高 */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    
    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* 圆角 */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.3);
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* 容器宽度 */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

/* ========================
   重置与基础样式
   ======================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ========================
   工具类
   ======================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================
   顶部信息栏
   ======================== */
.top-bar {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1e293b 100%);
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
}

.top-bar__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar__contact {
    display: flex;
    gap: var(--space-6);
}

.top-bar__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.top-bar__item .icon {
    width: 14px;
    height: 14px;
    color: var(--color-primary-light);
}

.top-bar__link {
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

.top-bar__link:hover {
    color: var(--color-primary-light);
}

/* 语言选择器 */
.lang-selector {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.lang-link {
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

.lang-link:hover {
    color: var(--color-primary-light);
}

.lang-link--active {
    color: var(--color-primary-light);
    font-weight: 500;
    background: rgba(59, 130, 246, 0.1);
}

.lang-separator {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

/* ========================
   主导航
   ======================== */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

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

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo__icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.logo__icon svg {
    width: 100%;
    height: 100%;
}

.logo__text {
    display: flex;
    flex-direction: column;
}

.logo__name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.2;
}

.logo__slogan {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    letter-spacing: 0.05em;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-menu__item {
    position: relative;
}

.nav-menu__link {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-menu__link:hover {
    color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.nav-menu__link--active {
    color: var(--color-primary);
    background: rgba(0, 102, 255, 0.08);
}

/* 子菜单 */
.nav-menu__item--has-submenu > .nav-menu__link::after {
    content: '';
    width: 16px;
    height: 16px;
    margin-left: var(--space-1);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='currentColor'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-size: contain;
    transition: transform var(--transition-fast);
}

.nav-menu__item--has-submenu:hover > .nav-menu__link::after {
    transform: rotate(180deg);
}

.nav-submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    padding: var(--space-2);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
}

.nav-menu__item--has-submenu:hover .nav-submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-submenu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-submenu a:hover {
    color: var(--color-primary);
    background: var(--color-bg-secondary);
}

/* 头部操作区 */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-toggle:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
}

.search-toggle .icon {
    width: 20px;
    height: 20px;
}

/* 汉堡菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hamburger__line {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ========================
   按钮组件
   ======================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    color: var(--color-text-light);
    box-shadow: 0 4px 14px rgba(0, 102, 255, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

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

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

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

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

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

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

.btn--small {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn--large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

.btn .icon {
    width: 18px;
    height: 18px;
}

.btn .icon--right {
    margin-left: var(--space-1);
}

/* ========================
   Hero区域
   ======================== */
.hero {
    position: relative;
    min-height: calc(100vh - 112px);
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
}

.hero__background {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero__particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
}

.hero__gradient {
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.8) 100%);
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    padding: var(--space-16) 0;
}

.hero__badge {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
}

.badge--tech {
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    color: white;
}

.badge--new {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.badge--hot {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.hero__since {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.hero__title {
    font-size: var(--text-5xl);
    font-weight: 800;
    line-height: var(--leading-tight);
    color: white;
    margin-bottom: var(--space-6);
}

.hero__highlight {
    display: block;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__description {
    font-size: var(--text-lg);
    color: var(--color-text-tertiary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-8);
}

.hero__actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero__stats {
    display: flex;
    gap: var(--space-10);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-item__number {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: white;
    line-height: 1;
}

.stat-item__label {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
}

.hero__scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.scroll-text {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ========================
   快速导航
   ======================== */
.quick-nav {
    padding: var(--space-16) 0;
    background: var(--color-bg-secondary);
}

.quick-nav__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.quick-nav__card {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.quick-nav__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    border-radius: var(--radius-lg);
    color: white;
    flex-shrink: 0;
}

.quick-nav__icon svg {
    width: 28px;
    height: 28px;
}

.quick-nav__content {
    flex: 1;
}

.quick-nav__number {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.quick-nav__title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-top: var(--space-1);
}

.quick-nav__subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.quick-nav__arrow {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    color: var(--color-text-tertiary);
    transition: all var(--transition-fast);
}

.quick-nav__card:hover .quick-nav__arrow {
    background: var(--color-primary);
    color: white;
}

.quick-nav__arrow .icon {
    width: 18px;
    height: 18px;
}

/* ========================
   区块标题
   ======================== */
.section-header {
    margin-bottom: var(--space-10);
}

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

.section-header__label {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-2);
}

.section-header__title {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.section-header__description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
}

.section-header--center .section-header__description {
    margin: 0 auto;
}

.section-label {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

/* ========================
   产品区块
   ======================== */
.products-section {
    padding: var(--space-20) 0;
    background: var(--color-bg-primary);
}

/* 分类标签 */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-10);
}

.category-tab {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-tab:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.category-tab--active {
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    color: white;
}

.category-tab--more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.category-tab--more:hover {
    background: var(--color-primary);
    color: white;
}

.category-tab .icon {
    width: 16px;
    height: 16px;
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.products-grid--page {
    grid-template-columns: repeat(3, 1fr);
}

.products-grid--related {
    grid-template-columns: repeat(3, 1fr);
}

/* 产品卡片 */
.product-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.product-card__image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image img {
    transform: scale(1.05);
}

.product-card__overlay {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
}

.product-card__content {
    padding: var(--space-5);
}

.product-card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: var(--leading-tight);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-card__title a {
    color: inherit;
    text-decoration: none;
}

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

.product-card__image-link {
    display: block;
    text-decoration: none;
}

.product-card__description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
    line-height: var(--leading-relaxed);
}

.product-card__specs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.spec-tag {
    display: inline-flex;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
}

.product-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    transition: gap var(--transition-fast);
}

.product-card__link:hover {
    gap: var(--space-3);
}

.product-card__link .icon {
    width: 16px;
    height: 16px;
}

/* ========================
   关于我们区块
   ======================== */
.about-section {
    padding: var(--space-20) 0;
    background: var(--color-bg-secondary);
}

.about-section__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-section__title {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.about-section__highlight {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.about-section__description {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.about-section__description p + p {
    margin-top: var(--space-4);
}

.about-section__features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

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

.feature-item__icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    border-radius: var(--radius-lg);
    color: white;
    flex-shrink: 0;
}

.feature-item__icon svg {
    width: 22px;
    height: 22px;
}

.feature-item__title {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.feature-item__desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.about-section__visual {
    position: relative;
}

.about-section__image {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.about-section__image img {
    width: 100%;
    height: auto;
}

.about-section__experience {
    position: absolute;
    bottom: var(--space-6);
    left: var(--space-6);
    background: white;
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.experience__number {
    display: block;
    font-size: var(--text-4xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.experience__text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.about-section__contact-card {
    position: absolute;
    bottom: var(--space-6);
    right: var(--space-6);
    background: white;
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    min-width: 240px;
}

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

.contact-card__item + .contact-card__item {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.contact-card__item .icon {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-card__label {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-1);
}

.contact-card__value {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ========================
   新闻区块
   ======================== */
.news-section {
    padding: var(--space-20) 0;
    background: var(--color-bg-primary);
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

.news-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.news-card:hover {
    box-shadow: var(--shadow-xl);
}

.news-card--featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.news-card__image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.news-card--featured .news-card__image {
    aspect-ratio: auto;
}

.news-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.news-card:hover .news-card__image img {
    transform: scale(1.05);
}

.news-card__date {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 56px;
    padding: var(--space-2) var(--space-1);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 2;
}

.news-card__date .date__day {
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.news-card__date .date__month {
    font-size: 0.75rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.date__day {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.date__month {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.date__year {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.news-card__content {
    padding: var(--space-6);
}

.news-card__category {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.news-card__title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    line-height: var(--leading-tight);
}

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

.news-card__excerpt {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-4);
}

.news-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
}

.news-card__link:hover {
    gap: var(--space-3);
}

/* 新闻列表 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.news-item {
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.news-item:hover {
    box-shadow: var(--shadow-md);
}

.news-item__date {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
}

.news-item__title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: var(--leading-tight);
}

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

.news-item__excerpt {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.section-footer {
    display: flex;
    justify-content: center;
    margin-top: var(--space-10);
}

/* ========================
   CTA区块
   ======================== */
.cta-section {
    position: relative;
    padding: var(--space-24) 0;
    overflow: hidden;
}

.cta-section__background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
}

.cta-section__pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.cta-section__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-section__title {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-4);
}

.cta-section__description {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-8);
}

.cta-section__actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
}

/* ========================
   页脚
   ======================== */
.main-footer {
    background: var(--color-bg-dark);
    color: var(--color-text-tertiary);
}

.footer__top {
    padding: var(--space-16) 0;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
}

.footer__brand .logo {
    margin-bottom: var(--space-5);
}

.footer__brand .logo__name {
    color: white;
}

.footer__description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
    max-width: 320px;
}

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

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--text-sm);
}

.footer__contact-item .icon {
    width: 18px;
    height: 18px;
    color: var(--color-primary-light);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer__title {
    font-size: var(--text-base);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-5);
}

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

.footer__menu a {
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

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

.footer__bottom {
    padding: var(--space-5) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
}

/* ========================
   页面标题区
   ======================== */
.page-header {
    position: relative;
    padding: var(--space-16) 0;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1e293b 100%);
    overflow: hidden;
}

.page-header__background {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
}

.page-header__content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.page-header__title {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-2);
}

.page-header__subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-tertiary);
    letter-spacing: 0.2em;
}

/* ========================
   面包屑导航
   ======================== */
.breadcrumb {
    padding: var(--space-4) 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb--product {
    background: var(--color-bg-primary);
}

.breadcrumb__list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: var(--text-sm);
}

.breadcrumb__item:not(:last-child)::after {
    content: '>';
    margin-left: var(--space-2);
    color: var(--color-text-tertiary);
}

.breadcrumb__link {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.breadcrumb__item--active {
    color: var(--color-text-tertiary);
}


/* ========================
   联系页面样式
   ======================== */

.contact-section {
    padding: var(--space-16) 0;
    background: var(--color-bg-primary);
}

/* 联系卡片 */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

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

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

.contact-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    border-radius: var(--radius-xl);
    color: white;
}

.contact-card__icon svg {
    width: 32px;
    height: 32px;
}

.contact-card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.contact-card__text {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
}

.contact-card__subtext {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* 联系布局 */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

/* 联系表单 */
.contact-form-wrapper {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.contact-form__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.contact-form__desc {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group--checkbox {
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-label--checkbox {
    margin-bottom: 0;
}

.form-label .required {
    color: var(--color-error);
    margin-left: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

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

.form-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

.form-error {
    font-size: var(--text-sm);
    color: var(--color-error);
    min-height: 20px;
}

/* 表单消息提示 */
.form-message {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
    display: none;
}

.form-message--success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.form-message--error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

/* 按钮内的加载动画 */
.btn .loading-spinner {
    width: 16px;
    height: 16px;
    border-width: 2px;
    display: inline-block;
    vertical-align: middle;
    margin-right: var(--space-2);
}

/* 地图区域 */
.contact-map-wrapper {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.contact-map__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
}

.map-container {
    position: relative;
    width: 100%;
    height: 300px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.map-container--large {
    height: 400px;
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.contact-map__info {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.contact-map__info p {
    font-size: var(--text-base);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.contact-map__info ul {
    list-style: disc;
    padding-left: var(--space-6);
}

.contact-map__info li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

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

.about-intro {
    padding: var(--space-20) 0;
    background: var(--color-bg-secondary);
}

.about-intro__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-intro__title {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.about-intro__highlight {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.about-intro__description {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.about-intro__description p + p {
    margin-top: var(--space-4);
}

.about-intro__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.about-stat {
    text-align: center;
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.about-stat__number {
    display: block;
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.about-stat__label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.about-intro__image {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.about-intro__image img {
    width: 100%;
    height: auto;
    display: block;
}

.about-intro__badge {
    position: absolute;
    bottom: var(--space-6);
    right: var(--space-6);
    background: white;
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.about-intro__badge .badge__number {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.about-intro__badge .badge__text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-tight);
}

/* 核心优势 */
.about-advantages {
    padding: var(--space-20) 0;
    background: var(--color-bg-primary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

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

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

.advantage-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    border-radius: var(--radius-xl);
    color: white;
}

.advantage-card__icon svg {
    width: 32px;
    height: 32px;
}

.advantage-card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.advantage-card__desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* 发展历程 */
.about-timeline {
    padding: var(--space-20) 0;
    background: var(--color-bg-secondary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 100px;
    width: 2px;
    background: var(--color-border);
}

.timeline__item {
    position: relative;
    padding-left: 140px;
    padding-bottom: var(--space-8);
}

.timeline__item:last-child {
    padding-bottom: 0;
}

.timeline__year {
    position: absolute;
    left: 0;
    top: 0;
    width: 80px;
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-primary);
    text-align: right;
}

.timeline__content {
    background: white;
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.timeline__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.timeline__desc {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ========================
   企业文化页面样式
   ======================== */

.culture-section {
    padding: var(--space-16) 0;
    background: var(--color-bg-primary);
}

.culture-section__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
    text-align: center;
}

/* 企业价值观 */
.culture-values {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

.culture-value {
    text-align: center;
    padding: var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.culture-value__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    border-radius: var(--radius-xl);
    color: white;
}

.culture-value__icon svg {
    width: 32px;
    height: 32px;
}

.culture-value__title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.culture-value__desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* 活动列表 */
.culture-activities {
    margin-top: var(--space-16);
}

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

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

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

.activity-card__image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.activity-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.activity-card:hover .activity-card__image img {
    transform: scale(1.05);
}

.activity-card__image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--color-text-secondary);
    gap: var(--space-3);
}

.activity-card__image-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.6;
}

.activity-card__image-placeholder span {
    font-size: var(--text-sm);
    text-align: center;
    padding: 0 var(--space-4);
}

.activity-card__date {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.activity-card__content {
    padding: var(--space-5);
}

.activity-card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

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

.activity-card__excerpt {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-3);
}

.activity-card__link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
}

.activity-card__link:hover {
    text-decoration: underline;
}

/* ========================
   新闻页面样式
   ======================== */

.news-page {
    padding: var(--space-10) 0 var(--space-20);
    background: var(--color-bg-primary);
}

/* 新闻筛选 */
.news-filter {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-10);
}

.news-filter__btn {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.news-filter__btn:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.news-filter__btn.active {
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    color: white;
}

/* 新闻特色区域 */
.news-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-bottom: var(--space-10);
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.news-featured__image {
    position: relative;
    overflow: hidden;
}

.news-featured__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-featured__category {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: white;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.news-featured__content {
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-featured__date {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.news-featured__date .date__day {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.news-featured__date .date__month {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

.news-featured__date .date__year {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.news-featured__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    line-height: var(--leading-tight);
}

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

.news-featured__excerpt {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.news-featured__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-primary);
}

.news-featured__link:hover {
    gap: var(--space-3);
}

.news-featured__link svg {
    width: 18px;
    height: 18px;
}

/* 新闻网格页面 */
.news-grid--page {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

/* ========================
   新闻详情页
   ======================== */

.news-detail {
    padding: var(--space-16) 0;
}

.news-detail__layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.news-detail__article {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.news-detail__header {
    margin-bottom: var(--space-8);
    text-align: center;
}

.news-detail__title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.3;
    margin-bottom: var(--space-4);
}

.news-detail__meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-4);
    color: var(--gray-500);
    font-size: 0.875rem;
}

.news-detail__meta svg {
    width: 16px;
    height: 16px;
    margin-right: var(--space-1);
}

.news-detail__date,
.news-detail__author,
.news-detail__category,
.news-detail__views {
    display: flex;
    align-items: center;
}

.news-detail__image {
    margin-bottom: var(--space-8);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.news-detail__image img {
    width: 100%;
    height: auto;
    display: block;
}

.news-detail__content {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-700);
}

.news-detail__content p {
    margin-bottom: var(--space-4);
}

.news-detail__content h2,
.news-detail__content h3,
.news-detail__content h4 {
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
    color: var(--gray-900);
}

.news-detail__content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: var(--space-4) 0;
}

.news-detail__tags {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-200);
}

.news-detail__tags-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-right: var(--space-2);
}

.news-detail__tag {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    margin-right: var(--space-2);
}

.news-detail__share {
    margin-top: var(--space-8);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.news-detail__share-label {
    font-weight: 600;
    color: var(--gray-700);
}

.news-detail__share-buttons {
    display: flex;
    gap: var(--space-2);
}

.news-detail__share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    color: var(--gray-600);
    transition: all 0.2s ease;
}

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

.news-detail__share-btn svg {
    width: 20px;
    height: 20px;
}

.news-detail__nav {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--gray-200);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.news-detail__nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    text-decoration: none;
    transition: all 0.3s ease;
}

.news-detail__nav-item:hover {
    background: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.news-detail__nav-item--disabled {
    opacity: 0.5;
    pointer-events: none;
}

.news-detail__nav-item--prev {
    justify-content: flex-start;
}

.news-detail__nav-item--next {
    justify-content: flex-end;
    text-align: right;
}

.news-detail__nav-arrow {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    color: var(--gray-600);
    transition: all 0.3s ease;
}

.news-detail__nav-arrow svg {
    width: 20px;
    height: 20px;
}

.news-detail__nav-item:hover .news-detail__nav-arrow {
    background: var(--primary);
    color: white;
    transform: translateX(0);
}

.news-detail__nav-item--prev:hover .news-detail__nav-arrow {
    transform: translateX(-4px);
}

.news-detail__nav-item--next:hover .news-detail__nav-arrow {
    transform: translateX(4px);
}

.news-detail__nav-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    min-width: 0;
}

.news-detail__nav-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.news-detail__nav-title {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.95rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-detail__related {
    margin-top: var(--space-16);
    padding-top: var(--space-12);
    border-top: 2px solid var(--gray-200);
}

.news-detail__related-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
}

.news-detail__related-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.news-detail__related-item {
    display: flex;
    gap: var(--space-4);
}

.news-detail__related-image {
    width: 120px;
    height: 80px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    flex-shrink: 0;
}

.news-detail__related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-detail__related-content {
    flex: 1;
}

.news-detail__related-date {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: var(--space-1);
}

.news-detail__related-item-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
}

.news-detail__related-item-title a {
    color: var(--gray-900);
    text-decoration: none;
}

.news-detail__related-item-title a:hover {
    color: var(--primary);
}

@media (max-width: 768px) {
    .news-detail {
        padding: var(--space-8) 0;
    }
    
    .news-detail__article {
        max-width: 100%;
    }
    
    .news-detail__title {
        font-size: 1.5rem;
    }
    
    .news-detail__meta {
        flex-direction: column;
        gap: var(--space-2);
        align-items: flex-start;
    }
    
    .news-detail__content {
        font-size: 1rem;
    }
    
    .news-detail__nav {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .news-detail__nav-item {
        padding: var(--space-4);
    }
    
    .news-detail__nav-item--next {
        text-align: left;
        justify-content: flex-start;
    }
    
    .news-detail__nav-item--next .news-detail__nav-info {
        order: 1;
    }
    
    .news-detail__nav-item--next .news-detail__nav-arrow {
        order: 0;
    }
    
    .news-detail__related-list {
        grid-template-columns: 1fr;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .news-featured,
    .timeline__content,
    .about-stat {
        background: #1e293b;
    }
}


/* ========================
   关于我们页面 - 联系我们区域
   ======================== */

.about-contact {
    padding: var(--space-20) 0;
    background: white;
}

.about-contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-contact__info {
    max-width: 500px;
}

.about-contact__title {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.about-contact__desc {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    line-height: var(--leading-relaxed);
}

/* 联系详情列表 */
.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.contact-detail__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-gradient-start) 0%, var(--color-primary-gradient-end) 100%);
    border-radius: var(--radius-lg);
    color: white;
    flex-shrink: 0;
}

.contact-detail__icon svg {
    width: 24px;
    height: 24px;
}

.contact-detail__content {
    flex: 1;
}

.contact-detail__title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.contact-detail__text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* 地图区域 */
.about-contact__map .map-container {
    height: 400px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* 响应式 */
@media (max-width: 1024px) {
    .about-contact__grid {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .about-contact__info {
        max-width: 100%;
    }

    .about-contact__map {
        order: -1;
    }

    .about-contact__map .map-container {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .about-contact {
        padding: var(--space-16) 0;
    }

    .about-contact__title {
        font-size: var(--text-2xl);
    }

    .contact-detail__icon {
        width: 40px;
        height: 40px;
    }

    .contact-detail__icon svg {
        width: 20px;
        height: 20px;
    }
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
    .about-contact {
        background: #0f172a;
    }
}