/* ============================================================
   style.css - 米兰体育(Milan) 官方品牌官网
   风格: 现代体育激情 · 暗色/亮色双模式 · 毛玻璃 · 渐变Banner
   响应式: PC + 手机自适应
   性能: 全部内联CSS (此文件为独立CSS)
   ============================================================ */

/* ---------- 全局变量 & 重置 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 亮色主题 */
    --bg: #ffffff;
    --text: #1a1a2e;
    --text-light: #555;
    --card-bg: #f8f9fa;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.25);
    --accent: #e63946;
    --accent-hover: #c1121f;
    --accent2: #1a1a2e;
    --accent2-light: #2a2a4e;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 35px rgba(0, 0, 0, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif;
    --hero-height: 600px;
    --header-bg: rgba(255, 255, 255, 0.95);
    --header-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --nav-gap: 28px;
    --max-width: 1200px;
}

/* 暗色主题 */
body.dark {
    --bg: #0f0f1a;
    --text: #e4e4ec;
    --text-light: #aaa;
    --card-bg: #1a1a2e;
    --glass-bg: rgba(26, 26, 46, 0.78);
    --glass-border: rgba(255, 255, 255, 0.08);
    --accent: #ff4757;
    --accent-hover: #ff6b7a;
    --accent2: #0f0f1a;
    --accent2-light: #1e1e36;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 12px 35px rgba(0, 0, 0, 0.7);
    --header-bg: rgba(15, 15, 26, 0.95);
    --header-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

/* ---------- 基础样式 ---------- */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 通用组件 ---------- */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    color: var(--accent);
    position: relative;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 70px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    margin: 12px auto 0;
    border-radius: 4px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 640px;
    margin: 0 auto 48px;
    line-height: 1.6;
}

/* 毛玻璃卡片 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

/* 主按钮 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 34px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(230, 57, 70, 0.4);
}

.btn-link {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition);
}

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

.btn-link:hover {
    color: var(--accent-hover);
}

.btn-link:hover::after {
    width: 100%;
}

/* 图片说明 */
.image-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 10px;
    font-style: italic;
}

/* 淡入动画 (配合JS) */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- 头部导航 ---------- */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(128, 128, 128, 0.08);
    box-shadow: var(--header-shadow);
    transition: background var(--transition), box-shadow var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 10px 24px;
    gap: 20px;
}

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

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

.main-nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition), color var(--transition);
    font-size: 0.95rem;
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    border-bottom-color: var(--accent);
    color: var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--card-bg);
    border-radius: 50px;
    padding: 4px 16px;
    border: 1px solid transparent;
    transition: border-color var(--transition), background var(--transition);
}

.search-box:focus-within {
    border-color: var(--accent);
    background: var(--bg);
}

.search-box input {
    border: none;
    background: transparent;
    padding: 8px 6px;
    outline: none;
    color: var(--text);
    width: 150px;
    font-size: 0.9rem;
}

.search-box input::placeholder {
    color: var(--text-light);
    opacity: 0.6;
}

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    color: var(--text-light);
    transition: color var(--transition);
}

.search-box button:hover {
    color: var(--accent);
}

#darkModeToggle {
    background: none;
    border: 1px solid var(--text-light);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
    transition: background var(--transition), border-color var(--transition);
    flex-shrink: 0;
}

#darkModeToggle:hover {
    background: var(--card-bg);
    border-color: var(--accent);
    color: var(--accent);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    flex-shrink: 0;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text);
    border-radius: 4px;
    transition: transform var(--transition), opacity var(--transition);
}

/* 面包屑 */
.breadcrumb {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 10px 24px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.breadcrumb li + li::before {
    content: '›';
    margin-right: 8px;
    opacity: 0.5;
}

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

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    color: var(--text-light);
    opacity: 0.7;
}

/* ---------- Hero 轮播 ---------- */
.hero-section {
    position: relative;
    overflow: hidden;
}

.hero-banner {
    position: relative;
    width: 100%;
    height: var(--hero-height);
    min-height: 400px;
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    z-index: 1;
}

.slide.active {
    opacity: 1;
    z-index: 2;
}

.slide svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 8%;
    transform: translateY(-50%);
    color: #fff;
    z-index: 3;
    max-width: 520px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.slide-content h1,
.slide-content h2 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.slide-content p {
    font-size: 1.15rem;
    margin-bottom: 28px;
    opacity: 0.92;
    line-height: 1.6;
}

.slider-controls {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    padding: 0 20px;
    z-index: 5;
}

.slider-controls button {
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
    border: none;
    font-size: 2rem;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.slider-controls button:hover {
    background: var(--accent);
    transform: scale(1.08);
}

.slider-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 5;
}

.slider-dots button {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.7);
    background: transparent;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.slider-dots button.active {
    background: #fff;
    transform: scale(1.2);
    border-color: #fff;
}

/* ---------- 品牌介绍 ---------- */
.brand-content {
    display: flex;
    gap: 50px;
    align-items: center;
    flex-wrap: wrap;
}

.brand-text {
    flex: 2;
    min-width: 300px;
}

.brand-text p {
    margin-bottom: 18px;
    font-size: 1.02rem;
    line-height: 1.8;
    color: var(--text);
}

.brand-image {
    flex: 1;
    min-width: 260px;
    text-align: center;
}

.brand-image svg {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 0 auto;
}

/* ---------- 企业文化 ---------- */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.culture-card {
    padding: 36px 28px;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

.culture-card svg {
    margin: 0 auto 18px;
}

.culture-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--accent);
}

.culture-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ---------- 团队介绍 ---------- */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 36px 24px 30px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.team-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: var(--shadow-hover);
}

.team-card svg {
    margin: 0 auto 16px;
    border-radius: 50%;
}

.team-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.team-card p {
    margin-top: 8px;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ---------- 产品中心 ---------- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.product-card svg {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-card h3 {
    padding: 22px 22px 10px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent);
}

.product-card p {
    padding: 0 22px 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.product-card .btn-link {
    display: inline-block;
    margin: 0 22px 22px;
}

/* ---------- 产品优势 ---------- */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 25px;
}

.advantage-card {
    padding: 28px 20px;
    text-align: center;
    transition: transform var(--transition);
}

.advantage-card svg {
    margin: 0 auto 14px;
}

.advantage-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--accent);
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ---------- 服务支持 ---------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.service-card {
    text-align: center;
    padding: 36px 24px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.service-card svg {
    margin: 0 auto 16px;
}

.service-card h3 {
    margin: 14px 0 12px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
}

.service-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ---------- 核心优势 (数字) ---------- */
.core-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 30px;
    text-align: center;
}

.core-item {
    padding: 28px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.core-item:hover {
    transform: translateY(-4px);
}

.core-number {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
    letter-spacing: -1px;
}

.core-item p {
    font-size: 1.05rem;
    margin-top: 10px;
    color: var(--text-light);
    font-weight: 500;
}

/* ---------- 解决方案 ---------- */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.solution-card {
    padding: 34px 28px;
    transition: transform var(--transition);
}

.solution-card h3 {
    color: var(--accent);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.solution-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ---------- 应用行业 ---------- */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 25px;
    text-align: center;
}

.industry-card {
    padding: 28px 16px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: default;
}

.industry-card:hover {
    transform: scale(1.06);
    box-shadow: var(--shadow-hover);
}

.industry-card svg {
    margin: 0 auto 12px;
}

.industry-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

/* ---------- 成功案例 ---------- */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.case-card svg {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.case-card h3 {
    padding: 22px 22px 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
}

.case-card p {
    padding: 0 22px 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.case-card .btn-link {
    display: inline-block;
    margin: 0 22px 22px;
}

/* ---------- 客户评价 ---------- */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    padding: 34px 28px;
    text-align: center;
    transition: transform var(--transition);
}

.testimonial-card svg {
    margin: 0 auto 18px;
    border-radius: 50%;
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 16px;
    color: var(--text);
    line-height: 1.7;
    font-size: 1rem;
}

.testimonial-card cite {
    font-style: normal;
    color: var(--accent);
    font-weight: 600;
    opacity: 0.9;
}

/* ---------- 新闻资讯 ---------- */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.news-card svg {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-content {
    padding: 22px;
}

.news-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.news-date {
    font-size: 0.85rem;
    color: var(--text-light);
    opacity: 0.7;
    margin-bottom: 12px;
}

.news-content p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.related-section {
    margin-top: 48px;
    padding: 24px 28px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.related-section h3 {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.related-section ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.related-section a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
    position: relative;
}

.related-section a::before {
    content: '•';
    color: var(--accent);
    margin-right: 6px;
}

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

/* ---------- 最新文章 ---------- */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}

.article-card {
    padding: 28px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.article-card h3 {
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.article-meta {
    font-size: 0.85rem;
    color: var(--text-light);
    opacity: 0.7;
    margin-bottom: 12px;
}

.article-card p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

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

.faq-item {
    margin-bottom: 14px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--card-bg);
}

.faq-question {
    width: 100%;
    background: var(--card-bg);
    border: none;
    padding: 18px 26px;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition), color var(--transition);
}

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

.faq-icon {
    font-size: 1.6rem;
    font-weight: 300;
    transition: transform var(--transition);
    color: var(--accent);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.3s ease;
    background: var(--card-bg);
    padding: 0 26px;
}

.faq-item.active .faq-answer {
    max-height: 600px;
    padding: 6px 26px 22px;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ---------- HowTo ---------- */
.howto-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.howto-content h3 {
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: 700;
    margin: 36px 0 16px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--glass-border);
}

.howto-content ul,
.howto-content ol {
    padding-left: 28px;
    margin-bottom: 24px;
}

.howto-content li {
    margin-bottom: 12px;
    color: var(--text-light);
    line-height: 1.7;
}

.howto-content li strong {
    color: var(--accent);
    font-weight: 600;
}

.howto-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.contact-info h3 {
    color: var(--accent);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.contact-info p {
    margin-bottom: 12px;
    color: var(--text-light);
    line-height: 1.8;
}

.contact-info strong {
    color: var(--text);
    font-weight: 600;
}

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

.contact-qr h3 {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 700;
    margin: 24px 0 12px;
}

.contact-qr svg {
    margin: 0 auto 12px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.contact-qr p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ---------- 页脚 ---------- */
footer {
    background: var(--accent2);
    color: #e0e0e8;
    padding: 60px 24px 24px;
    margin-top: 40px;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 36px;
    margin-bottom: 44px;
}

.footer-col h4 {
    color: #fff;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
}

.footer-col p {
    margin-bottom: 10px;
    opacity: 0.8;
    line-height: 1.7;
    font-size: 0.95rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #bbb;
    text-decoration: none;
    transition: color var(--transition);
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    text-align: center;
    font-size: 0.88rem;
    opacity: 0.75;
}

.footer-bottom p {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* ---------- 返回顶部 ---------- */
#backToTop {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(230, 57, 70, 0.35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.35s, visibility 0.35s, transform 0.35s, box-shadow var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#backToTop:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 10px 30px rgba(230, 57, 70, 0.5);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    :root {
        --hero-height: 500px;
    }

    .slide-content h1,
    .slide-content h2 {
        font-size: 2.2rem;
    }

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 768px) {
    :root {
        --hero-height: 420px;
        --nav-gap: 0;
    }

    .header-inner {
        padding: 10px 16px;
        gap: 12px;
    }

    .main-nav {
        display: none;
        width: 100%;
        background: var(--bg);
        position: absolute;
        top: 100%;
        left: 0;
        padding: 20px 24px;
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
        border-radius: 0 0 var(--radius) var(--radius);
    }

    .main-nav.open {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 6px;
    }

    .main-nav a {
        display: block;
        padding: 12px 0;
        border-bottom: none;
        border-left: 3px solid transparent;
        padding-left: 12px;
    }

    .main-nav a:hover,
    .main-nav a.active {
        border-left-color: var(--accent);
        border-bottom-color: transparent;
    }

    .menu-toggle {
        display: flex;
    }

    .search-box input {
        width: 100px;
    }

    .slide-content {
        left: 6%;
        max-width: 88%;
    }

    .slide-content h1,
    .slide-content h2 {
        font-size: 1.8rem;
    }

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

    .section-title {
        font-size: 1.7rem;
    }

    .brand-content {
        flex-direction: column;
        gap: 30px;
    }

    .core-number {
        font-size: 2.5rem;
    }

    .news-grid,
    .articles-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

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

    .slider-controls button {
        width: 40px;
        height: 40px;
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    :root {
        --hero-height: 340px;
    }

    .header-inner {
        padding: 8px 12px;
    }

    .search-box input {
        width: 70px;
    }

    .slide-content h1,
    .slide-content h2 {
        font-size: 1.4rem;
    }

    .slide-content p {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }

    .btn-primary {
        padding: 10px 22px;
        font-size: 0.9rem;
    }

    .section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
        margin-bottom: 32px;
    }

    .core-number {
        font-size: 2rem;
    }

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

    #backToTop {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    header,
    #backToTop,
    .slider-controls,
    .slider-dots,
    .menu-toggle,
    #darkModeToggle,
    .search-box {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .section {
        padding: 30px 0;
        page-break-inside: avoid;
    }
}