:root {
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f3f5;
    --text-dark: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #888888;
    --accent: #c59a3d;
    --accent-hover: #b0852f;
    --accent-soft: rgba(197, 154, 61, 0.08);
    --border: #e9ecef;
    --border-light: #dee2e6;
    --font-sans: 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --radius-sm: 8px;
    --max-width: 1280px;
    --header-height: 72px;
    --section-padding: 80px 0;
    --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); font-size: 16px; }
body { font-family: var(--font-sans); background-color: var(--bg-white); color: var(--text-dark); line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; }

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled { background: rgba(255, 255, 255, 0.98); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); }
.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.logo { text-decoration: none; color: var(--text-dark); font-weight: 800; font-size: 1.6rem; letter-spacing: -0.5px; white-space: nowrap; line-height: 1; }
.logo .logo-accent { color: var(--accent); }
.nav-menu { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-menu li a {
    display: block;
    padding: 8px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    border-radius: 50px;
    transition: all var(--transition);
    position: relative;
}
.nav-menu li a:hover, .nav-menu li a.active { color: var(--accent); background: var(--accent-soft); }
.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: transform var(--transition);
}
.nav-menu li a:hover::after, .nav-menu li a.active::after { transform: translateX(-50%) scaleX(1); }

.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; z-index: 1001; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: all var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero-slider { position: relative; width: 100%; height: 100vh; min-height: 600px; overflow: hidden; background: var(--bg-light); }
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1); pointer-events: none; }
.hero-slide.active { opacity: 1; pointer-events: auto; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: brightness(0.6) saturate(1.02); transform: scale(1.08); transition: transform 6s ease-out; }
.hero-slide.active img { transform: scale(1); }
.hero-slide::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.1) 30%, rgba(0,0,0,0.45) 70%, rgba(0,0,0,0.7) 100%); pointer-events: none; }
.hero-content {
    position: absolute;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    text-align: center;
    max-width: 700px;
    padding: 0 24px;
    opacity: 0;
    transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
    transform: translateX(-50%) translateY(30px);
}
.hero-slide.active .hero-content { opacity: 1; transform: translateX(-50%) translateY(0); }
.slide-title { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; letter-spacing: 1px; margin-bottom: 16px; color: #ffffff; text-shadow: 0 4px 30px rgba(0,0,0,0.5); line-height: 1.2; }
.hero-content p { font-size: clamp(1rem, 2vw, 1.25rem); color: rgba(255,255,255,0.85); margin-bottom: 32px; text-shadow: 0 2px 20px rgba(0,0,0,0.4); }
.btn { display: inline-block; padding: 14px 32px; border-radius: 50px; font-size: 0.95rem; font-weight: 600; letter-spacing: 0.5px; text-decoration: none; cursor: pointer; border: none; transition: all var(--transition); text-align: center; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 24px rgba(197, 154, 61, 0.35); }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 12px 32px rgba(197, 154, 61, 0.45); transform: translateY(-2px); }
.btn-outline { background: transparent; color: #ffffff; border: 1.5px solid rgba(255,255,255,0.5); margin-left: 12px; }
.btn-outline:hover { border-color: #ffffff; color: #ffffff; background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.slider-dots { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 10; display: flex; gap: 10px; }
.slider-dots button { width: 10px; height: 10px; border-radius: 50%; border: none; background: rgba(255,255,255,0.4); cursor: pointer; transition: all var(--transition); padding: 0; }
.slider-dots button.active { background: #ffffff; width: 30px; border-radius: 5px; box-shadow: 0 0 20px rgba(255,255,255,0.5); }
.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 10; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25); color: #fff; width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 1.3rem; transition: all var(--transition); backdrop-filter: blur(8px); }
.slider-arrow:hover { background: rgba(255,255,255,0.25); border-color: #fff; color: #fff; }
.slider-arrow.prev { left: 20px; }
.slider-arrow.next { right: 20px; }

.section { padding: var(--section-padding); position: relative; }
.section-container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header .section-tag { display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; position: relative; }
.section-header .section-tag::before, .section-header .section-tag::after { content: ''; position: absolute; top: 50%; width: 40px; height: 1px; background: var(--accent); opacity: 0.4; }
.section-header .section-tag::before { right: 100%; margin-right: 12px; }
.section-header .section-tag::after { left: 100%; margin-left: 12px; }
.section-header h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; letter-spacing: 0.5px; margin-bottom: 16px; line-height: 1.3; color: var(--text-dark); }
.section-header p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; font-size: 1rem; }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-image { border-radius: var(--radius); overflow: hidden; position: relative; aspect-ratio: 4/3; box-shadow: var(--shadow-md); }
.about-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition); }
.about-image:hover img { transform: scale(1.03); }
.about-image .image-badge { position: absolute; bottom: 20px; left: 20px; background: rgba(255,255,255,0.92); backdrop-filter: blur(8px); padding: 12px 20px; border-radius: var(--radius-sm); border: 1px solid rgba(0,0,0,0.06); box-shadow: var(--shadow-sm); }
.about-image .image-badge span { color: var(--accent); font-weight: 700; font-size: 1.5rem; display: block; }
.about-image .image-badge small { color: var(--text-secondary); font-size: 0.8rem; }
.about-text h3 { font-size: 1.6rem; font-weight: 700; margin-bottom: 20px; color: var(--text-dark); }
.about-text p { color: var(--text-secondary); margin-bottom: 16px; font-size: 0.98rem; }
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 30px; }
.stat-item { text-align: center; padding: 20px; background: var(--bg-light); border-radius: var(--radius-sm); border: 1px solid var(--border); transition: all var(--transition); }
.stat-item:hover { border-color: var(--accent); background: var(--accent-soft); }
.stat-item .stat-number { font-size: 2rem; font-weight: 700; color: var(--accent); display: block; margin-bottom: 4px; }
.stat-item .stat-label { font-size: 0.85rem; color: var(--text-muted); }

.services-section { background: var(--bg-light); }
.services-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.service-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; transition: all var(--transition); position: relative; overflow: hidden; box-shadow: var(--shadow-sm); }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), transparent); opacity: 0; transition: opacity var(--transition); }
.service-card:hover { border-color: rgba(197, 154, 61, 0.35); background: var(--bg-card-hover); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.service-card:hover::before { opacity: 1; }
.service-icon { width: 56px; height: 56px; border-radius: 50%; background: var(--accent-soft); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 20px; border: 1px solid rgba(197, 154, 61, 0.2); }
.service-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.service-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
.service-card ul { list-style: none; padding: 0; }
.service-card ul li { padding: 6px 0; color: var(--text-muted); font-size: 0.85rem; display: flex; align-items: center; gap: 8px; }
.service-card ul li::before { content: '◆'; color: var(--accent); font-size: 0.6rem; }

.portfolio-tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.portfolio-tab { padding: 10px 28px; border-radius: 50px; border: 1px solid var(--border-light); background: transparent; color: var(--text-secondary); cursor: pointer; font-size: 0.9rem; font-weight: 500; transition: all var(--transition); font-family: var(--font-sans); letter-spacing: 0.5px; }
.portfolio-tab:hover { border-color: var(--accent); color: var(--accent); }
.portfolio-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }
.portfolio-grid { display: none; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.portfolio-grid.active { display: grid; }
.portfolio-item { border-radius: var(--radius-sm); overflow: hidden; position: relative; aspect-ratio: 4/3; cursor: pointer; border: 1px solid var(--border); transition: all var(--transition); box-shadow: var(--shadow-sm); }
.portfolio-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1); }
.portfolio-item:hover img { transform: scale(1.08); }
.portfolio-item .overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(0,0,0,0) 40%, rgba(0,0,0,0.75) 100%); display: flex; flex-direction: column; justify-content: flex-end; padding: 20px; opacity: 0; transition: opacity var(--transition); }
.portfolio-item:hover .overlay { opacity: 1; }
.portfolio-item:hover { border-color: rgba(197, 154, 61, 0.4); box-shadow: var(--shadow-md); }
.overlay h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; color: #fff; }
.overlay span { font-size: 0.8rem; color: var(--accent); }

.news-section { background: var(--bg-light); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-item { display: flex; gap: 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; transition: all var(--transition); text-decoration: none; color: inherit; box-shadow: var(--shadow-sm); }
.news-item:hover { border-color: rgba(197, 154, 61, 0.35); background: var(--bg-card-hover); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.news-date { flex-shrink: 0; width: 60px; height: 60px; border-radius: var(--radius-sm); background: var(--accent-soft); border: 1px solid rgba(197, 154, 61, 0.2); display: flex; flex-direction: column; align-items: center; justify-content: center; }
.news-date .day { font-size: 1.5rem; font-weight: 700; color: var(--accent); line-height: 1; }
.news-date .month { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.news-content h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; color: var(--text-dark); }
.news-content p { font-size: 0.85rem; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.contact-info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin-top: 20px; }
.contact-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; text-align: center; transition: all var(--transition); box-shadow: var(--shadow-sm); }
.contact-card:hover { border-color: rgba(197, 154, 61, 0.35); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.contact-card .contact-icon { width: 48px; height: 48px; border-radius: 50%; background: var(--accent-soft); border: 1px solid rgba(197, 154, 61, 0.2); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin: 0 auto 16px; }
.contact-card .info-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.contact-card .info-value { font-size: 1rem; color: var(--text-dark); font-weight: 500; word-break: break-word; }

.contact-note { text-align: center; margin-top: 30px; padding: 16px; background: var(--accent-soft); border: 1px solid rgba(197, 154, 61, 0.2); border-radius: var(--radius-sm); color: var(--text-secondary); font-size: 0.9rem; }

.map-container {
    margin-top: 30px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}
.map-container iframe {
    display: block;
    width: 100%;
    height: 300px;
    border: 0;
}

.llms-section { background: var(--bg-white); border-top: 1px solid var(--border); padding: 40px 0 60px; }
.llms-content { background: var(--bg-light); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; font-family: 'SF Mono', 'Fira Code', 'Consolas', 'Monaco', monospace; font-size: 0.8rem; line-height: 1.7; color: var(--text-secondary); white-space: pre-wrap; word-break: break-all; max-height: 300px; overflow-y: auto; }
.llms-content::-webkit-scrollbar { width: 6px; }
.llms-content::-webkit-scrollbar-track { background: #f1f1f1; }
.llms-content::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
.llms-note { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; padding: 12px 16px; background: var(--accent-soft); border: 1px solid rgba(197, 154, 61, 0.2); border-radius: var(--radius-sm); font-size: 0.85rem; color: var(--text-secondary); }
.llms-note strong { color: var(--accent); }

.footer { background: #f8f9fa; border-top: 1px solid var(--border); padding: 40px 0 20px; }
.footer-container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); margin-top: 12px; max-width: 300px; }
.footer-col h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; color: var(--text-dark); }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: var(--text-muted); text-decoration: none; font-size: 0.85rem; transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { max-width: var(--max-width); margin: 30px auto 0; padding: 20px 24px 0; border-top: 1px solid var(--border); display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 0.8rem; color: var(--text-muted); text-align: center; }
.footer-bottom a { color: var(--text-muted); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 新增：品牌矩阵优化样式 ===== */
.brand-matrix {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 10px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-family: var(--font-sans, 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', sans-serif);
}

.matrix-label {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: #c9a86c;
    text-transform: uppercase;
}

.matrix-sep,
.matrix-divider {
    color: rgba(255, 255, 255, 0.15);
    font-weight: 300;
    font-size: 0.9rem;
}

.matrix-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: #ccc;
    font-size: 0.95rem;
    transition: color 0.3s ease, transform 0.2s ease;
    padding: 2px 0;
}

.matrix-link:hover {
    color: #c9a86c;
    transform: translateY(-1px);
}

.matrix-category {
    font-weight: 500;
    color: #ddd;
    letter-spacing: 0.3px;
}

.matrix-link:hover .matrix-category {
    color: #c9a86c;
}

.matrix-dot {
    color: rgba(255, 255, 255, 0.2);
    font-weight: 300;
}

.matrix-brand {
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.matrix-link:hover .matrix-brand {
    color: #c9a86c;
}

@media (max-width: 600px) {
    .brand-matrix {
        gap: 4px 6px;
        font-size: 0.85rem;
    }
    .matrix-label {
        font-size: 0.75rem;
    }
    .matrix-link {
        font-size: 0.85rem;
    }
}

/* ===== 原有响应式（保留） ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-container { grid-template-columns: 1fr 1fr; }
    .services-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    :root { --header-height: 64px; --section-padding: 60px 0; }
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 4px;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid var(--border);
        padding: 40px 20px;
    }
    .nav-menu.open { right: 0; }
    .nav-menu li a { font-size: 1.1rem; padding: 14px 20px; }
    .hero-content { bottom: 80px; }
    .hero-content h1, .hero-content h2 { font-size: 1.8rem; }
    .slider-arrow { display: none; }
    .portfolio-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .news-grid { grid-template-columns: 1fr; gap: 16px; }
    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .stat-item { padding: 14px 8px; }
    .stat-item .stat-number { font-size: 1.4rem; }
    .footer-container { grid-template-columns: 1fr; gap: 24px; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .portfolio-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .hero-content h1, .hero-content h2 { font-size: 1.5rem; }
    .btn { padding: 12px 24px; font-size: 0.85rem; }
    .btn-outline { margin-left: 0; margin-top: 8px; }
    .hero-content .btn-group { display: flex; flex-direction: column; gap: 8px; }
    .slider-dots { bottom: 20px; }
}