/* ==================== 基础重置与变量 ==================== */
:root {
    --primary: #E85D2E;
    --primary-dark: #C94A1F;
    --primary-light: #FFF0EA;
    --secondary: #1A1A2E;
    --accent: #F4A460;
    --accent-light: #FFF3E6;
    --text-primary: #1A1A2E;
    --text-secondary: #555;
    --text-muted: #999;
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFAFA;
    --bg-dark: #0F0F1A;
    --border: #EAEAEA;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 32px;
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 700;
    color: var(--secondary);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border-radius: 10px;
    font-size: 18px;
}

.nav ul {
    display: flex;
    gap: 4px;
}

.nav a {
    display: block;
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
}

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

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--secondary);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== 通用区块 ==================== */
.section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.block-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 40px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border);
}

.block-title.center {
    text-align: center;
    border-bottom: none;
    padding-bottom: 0;
}

/* ==================== 首页 - Hero ==================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 0;
    overflow: hidden;
    background: linear-gradient(180deg, #FFFAF7 0%, #FFFFFF 100%);
}

.hero-bg {
    position: absolute;
    top: -200px;
    right: -300px;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 93, 46, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -200px;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(244, 164, 96, 0.05) 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 680px;
}

.hero-subtitle {
    font-size: 16px;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 4px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.2;
    color: var(--secondary);
    margin-bottom: 28px;
    letter-spacing: -1px;
}

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

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 48px;
    padding: 32px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.stat-item {
    flex: 1;
    text-align: center;
    padding: 8px 16px;
}

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--secondary);
    line-height: 1.2;
}

.stat-plus {
    font-size: 18px;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(232, 93, 46, 0.35);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    background: transparent;
    color: var(--secondary);
    font-size: 15px;
    font-weight: 600;
    border: 1.5px solid var(--border);
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--transition);
}

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

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollBounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator span::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scrollDot 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes scrollDot {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: 0.3; }
}

/* ==================== 品牌荣誉 ==================== */
.honor-section {
    background: var(--bg-secondary);
    padding: 100px 0;
}

.honor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.honor-card {
    padding: 36px 24px;
    background: white;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
    border: 1px solid transparent;
}

.honor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border);
}

.honor-card.highlight {
    background: linear-gradient(135deg, var(--secondary), #2A2A4A);
    color: white;
}

.honor-card.highlight .honor-year {
    color: var(--accent);
}

.honor-card.highlight .honor-name {
    color: rgba(255,255,255,0.8);
}

.honor-card.highlight .honor-award {
    color: white;
}

.honor-card.highlight .honor-line {
    background: var(--accent);
}

.honor-year {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 12px;
}

.honor-name {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.honor-award {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    min-height: 48px;
}

.honor-line {
    width: 32px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    margin: 0 auto;
}

/* ==================== 关于我们 ==================== */
.about-section {
    background: white;
}

.about-block {
    max-width: 860px;
    margin: 0 auto 80px;
}

.about-block:last-child {
    margin-bottom: 0;
}

.about-lead {
    font-size: 20px;
    font-weight: 500;
    color: var(--secondary);
    line-height: 1.9;
    margin-bottom: 24px;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 2;
}

/* 时间轴 */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -36px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--primary);
    z-index: 1;
}

.timeline-dot.accent {
    background: var(--accent);
    box-shadow: 0 0 0 3px var(--accent);
}

.timeline-content {
    background: var(--bg-secondary);
    padding: 28px;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-sm);
    background: white;
}

.timeline-year {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 14px;
    border-radius: 100px;
    margin-bottom: 12px;
}

.timeline-dot.accent + .timeline-content .timeline-year {
    color: #B8860B;
    background: #FFF8E1;
}

.timeline-content h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== 产品服务 ==================== */
.services-section {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition);
}

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

.service-card:hover::before {
    opacity: 1;
}

.service-card.highlight {
    border: 2px solid var(--primary);
    background: linear-gradient(180deg, #FFFAF7 0%, #FFFFFF 100%);
}

.service-card.highlight::before {
    opacity: 1;
}

.service-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 24px;
    color: var(--primary);
}

.service-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: 12px;
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 4px;
}

.service-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.service-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 24px;
}

.service-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.service-features li {
    font-size: 13px;
    color: var(--text-secondary);
    padding-left: 16px;
    position: relative;
    line-height: 1.8;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

/* 创新亮点 */
.innovation-block {
    max-width: 860px;
    margin: 0 auto;
}

.innovation-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.innovation-card {
    text-align: center;
    padding: 28px 16px;
    background: white;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

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

.innovation-icon {
    font-size: 36px;
    display: block;
    margin-bottom: 12px;
}

.innovation-card h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 6px;
}

.innovation-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ==================== 联系我们 ==================== */
.contact-section {
    background: white;
}

.contact-wrapper {
    max-width: 960px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.contact-card {
    padding: 32px 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition);
}

.contact-card:hover {
    background: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.contact-icon-wrap {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    color: var(--primary);
}

.contact-icon-wrap svg {
    width: 100%;
    height: 100%;
}

.contact-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

.contact-message-card {
    background: linear-gradient(135deg, var(--secondary), #2A2A4A);
    padding: 48px 40px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.contact-message-card blockquote {
    font-size: 18px;
    font-weight: 500;
    color: rgba(255,255,255,0.9);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
    border: none;
}

.contact-sub-text {
    font-size: 15px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-actions .btn-primary {
    font-size: 16px;
    padding: 16px 40px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--secondary);
    color: white;
    padding: 80px 0 32px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 80px;
    margin-bottom: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
    margin-bottom: 12px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-brand p {
    color: rgba(255,255,255,0.5);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255,255,255,0.4);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col li,
.footer-col a {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    transition: color var(--transition);
}

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

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

.footer-bottom p {
    font-size: 13px;
    color: rgba(255,255,255,0.3);
}

/* ==================== 动画 ==================== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 44px;
    }
    .section-title {
        font-size: 34px;
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .honor-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .innovation-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 28px;
    }

    /* 导航 */
    .mobile-menu-btn {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        border-bottom: 1px solid var(--border);
        padding: 16px 20px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav ul {
        flex-direction: column;
        gap: 4px;
    }

    .nav a {
        padding: 12px 16px;
        border-radius: var(--radius-sm);
    }

    /* Hero */
    .hero-section {
        padding: 100px 0 80px;
        min-height: auto;
    }

    .hero-title {
        font-size: 34px;
    }

    .hero-stats {
        flex-wrap: wrap;
        padding: 20px;
    }

    .stat-item {
        flex: 1 1 45%;
        padding: 12px 8px;
    }

    .stat-divider:nth-child(2) {
        display: none;
    }

    .stat-divider:nth-child(4) {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn-primary,
    .hero-cta .btn-outline {
        justify-content: center;
    }

    /* Honor */
    .honor-grid {
        grid-template-columns: 1fr 1fr;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
    }

    .innovation-cards {
        grid-template-columns: 1fr 1fr;
    }

    /* Contact */
    .contact-info {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-top {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
    }

    /* Timeline */
    .timeline {
        padding-left: 32px;
    }

    .timeline-dot {
        left: -28px;
    }

    .contact-message-card {
        padding: 32px 24px;
    }

    .contact-message-card blockquote {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 24px;
    }

    .hero-stats {
        gap: 8px;
    }

    .stat-number {
        font-size: 24px;
    }

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

    .innovation-cards {
        grid-template-columns: 1fr;
    }

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

    .about-lead {
        font-size: 17px;
    }

    .footer-links {
        flex-direction: column;
        gap: 24px;
    }
}