/* ===== 基础重置与全局变量 ===== */
:root {
    --primary: #e94560;
    --primary-dark: #c2304a;
    --primary-light: #f06a80;
    --secondary: #0f3460;
    --accent: #16213e;
    --bg: #f8f9fa;
    --bg-card: #ffffff;
    --text: #1a1a2e;
    --text-light: #6c757d;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --gradient: linear-gradient(135deg, #0f3460, #1a1a2e, #16213e);
    --gradient-cta: linear-gradient(135deg, #e94560, #c2304a);
    --max-width: 1200px;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

[data-theme="dark"] {
    --bg: #0a0a1a;
    --bg-card: #1a1a2e;
    --text: #f0f0f0;
    --text-light: #b0b0b0;
    --glass-bg: rgba(26, 26, 46, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

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

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--primary-dark);
}

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

/* ===== 工具类 ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    background: var(--gradient-cta);
    color: #fff;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(233, 69, 96, 0.4);
}

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

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

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    border: 1px solid rgba(233, 69, 96, 0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(233, 69, 96, 0.15);
    border-color: var(--primary);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.lazy-svg {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lazy-svg.loaded {
    opacity: 1;
}

/* ===== 头部导航 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    padding: 10px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
}

.logo svg {
    width: 40px;
    height: 40px;
}

.logo span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

nav a {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 5px 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle,
.search-toggle,
.menu-toggle {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover,
.search-toggle:hover,
.menu-toggle:hover {
    background: rgba(233, 69, 96, 0.1);
}

.menu-toggle {
    display: none;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    z-index: 999;
    padding: 80px 20px 30px;
    flex-direction: column;
    gap: 20px;
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu a {
    font-size: 1.2rem;
    padding: 12px 0;
    border-bottom: 1px solid rgba(233, 69, 96, 0.2);
}

.mobile-menu .close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text);
    cursor: pointer;
}

/* ===== Banner 区域 ===== */
.banner {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--gradient);
    overflow: hidden;
    padding-top: 80px;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(233, 69, 96, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(15, 52, 96, 0.2) 0%, transparent 50%);
    animation: bannerGlow 15s ease-in-out infinite alternate;
}

@keyframes bannerGlow {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }
    100% {
        transform: translate(-5%, -5%) rotate(5deg);
    }
}

.banner-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.banner-text h1 {
    font-size: 3.2rem;
    font-weight: 900;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 20px;
}

.banner-text h1 span {
    color: var(--primary);
}

.banner-text p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.15rem;
    margin-bottom: 30px;
    max-width: 500px;
}

.banner-cta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.banner-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.banner-visual svg {
    width: 100%;
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.banner-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}

.banner-indicators button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.banner-indicators button.active {
    background: var(--primary);
    border-color: var(--primary);
}

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: -60px;
    position: relative;
    z-index: 3;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(233, 69, 96, 0.1);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-top: 5px;
}

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.about-visual svg {
    width: 100%;
    max-width: 450px;
    height: auto;
}

/* ===== 品牌故事 ===== */
.brand-story {
    background: var(--gradient);
    color: #fff;
    padding: 80px 0;
}

.brand-story .section-title h2 {
    -webkit-text-fill-color: #fff;
    background: none;
}

.brand-story .section-title p {
    color: rgba(255, 255, 255, 0.7);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 700px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.timeline-year {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
    min-width: 80px;
}

.timeline-desc {
    color: rgba(255, 255, 255, 0.85);
}

/* ===== 团队 ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

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

.team-card svg {
    width: 120px;
    height: 120px;
    margin: 0 auto 15px;
    border-radius: 50%;
    background: var(--gradient);
    padding: 5px;
}

.team-card h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.team-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== 产品 ===== */
.products-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.products-tabs button {
    padding: 10px 25px;
    border-radius: 50px;
    border: 2px solid var(--primary);
    background: transparent;
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.products-tabs button.active,
.products-tabs button:hover {
    background: var(--primary);
    color: #fff;
}

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

.product-card svg {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
}

.product-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.product-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

/* ===== 优势 ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-card {
    text-align: center;
    padding: 40px 20px;
}

.advantage-card svg {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
}

.advantage-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.advantage-card p {
    color: var(--text-light);
}

/* ===== 服务 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    padding: 40px 25px;
    text-align: center;
}

.service-card svg {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
}

.service-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

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

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

.solution-card {
    padding: 30px;
}

.solution-card svg {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
}

.solution-card h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

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

/* ===== 行业 ===== */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.industry-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(233, 69, 96, 0.1);
    transition: var(--transition);
}

.industry-item:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}

.industry-item svg {
    width: 40px;
    height: 40px;
    margin: 0 auto 10px;
}

/* ===== 客户 ===== */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 30px;
    align-items: center;
}

.client-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    opacity: 0.7;
    transition: var(--transition);
}

.client-logo:hover {
    opacity: 1;
}

.client-logo svg {
    width: 100px;
    height: 50px;
}

/* ===== 案例 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-card {
    overflow: hidden;
}

.case-card svg {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.case-card .case-body {
    padding: 20px;
}

.case-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.case-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

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

.testimonial-card {
    padding: 30px;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.2;
    position: absolute;
    top: 10px;
    left: 20px;
    font-family: serif;
}

.testimonial-card p {
    color: var(--text-light);
    margin-bottom: 15px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-author svg {
    width: 45px;
    height: 45px;
    border-radius: 50%;
}

.testimonial-author strong {
    font-size: 0.95rem;
}

/* ===== 新闻 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-card {
    overflow: hidden;
}

.news-card svg {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.news-card .news-body {
    padding: 20px;
}

.news-card .news-date {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.news-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.news-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.news-card .btn {
    padding: 8px 20px;
    font-size: 0.85rem;
}

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

.faq-item {
    border-bottom: 1px solid rgba(233, 69, 96, 0.2);
    padding: 20px 0;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.05rem;
}

.faq-question svg {
    transition: var(--transition);
    width: 24px;
    height: 24px;
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    color: var(--text-light);
    padding: 0 20px 0 0;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 15px;
}

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

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.howto-step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-cta);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
}

.howto-step h4 {
    margin-bottom: 8px;
}

.howto-step p {
    color: var(--text-light);
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 2px solid rgba(233, 69, 96, 0.2);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
    margin-bottom: 15px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    outline: none;
}

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

/* ===== 页脚 ===== */
.footer {
    background: var(--accent);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer h4 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    display: block;
    margin-bottom: 8px;
}

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

.footer p {
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.footer-qr {
    display: flex;
    gap: 20px;
}

.footer-qr svg {
    width: 100px;
    height: 100px;
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 0.85rem;
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* ===== 搜索遮罩 ===== */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.search-overlay.open {
    display: flex;
}

.search-box {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.search-box input {
    width: 100%;
    padding: 15px 20px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--primary);
    background: var(--bg);
    color: var(--text);
    font-size: 1.1rem;
}

.search-box input:focus {
    outline: none;
}

.search-results {
    margin-top: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.search-results div {
    padding: 10px 0;
    border-bottom: 1px solid rgba(233, 69, 96, 0.1);
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-cta);
    color: #fff;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
    z-index: 100;
    transition: var(--transition);
}

.back-to-top.visible {
    display: flex;
}

.back-to-top:hover {
    transform: translateY(-3px);
}

/* ===== 相关文章 ===== */
.related-articles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .banner-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .banner-text h1 {
        font-size: 2.2rem;
    }

    .banner-cta {
        justify-content: center;
    }

    .banner-visual {
        display: none;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        margin-top: -40px;
    }

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

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

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

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

    nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .section {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

    .timeline-item {
        flex-direction: column;
        gap: 5px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }

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

    .banner-text h1 {
        font-size: 1.8rem;
    }
}