/* ==================== 全局变量（延续主站风格） ==================== */
        *,
        *::before,
        *::after { margin: 0; padding: 0; box-sizing: border-box; }

        :root {
            --color-primary: #FF6B35;
            --color-primary-dark: #E8551E;
            --color-primary-light: #FF8A5C;
            --color-primary-bg: rgba(255, 107, 53, 0.08);
            --color-primary-bg-hover: rgba(255, 107, 53, 0.14);
            --color-secondary: #1E293B;
            --color-gray-50: #F8FAFC;
            --color-gray-100: #F1F5F9;
            --color-gray-200: #E2E8F0;
            --color-gray-300: #CBD5E1;
            --color-gray-400: #94A3B8;
            --color-gray-500: #64748B;
            --color-gray-600: #475569;
            --color-gray-700: #334155;
            --color-gray-800: #1E293B;
            --color-gray-900: #0F172A;

            --font-heading: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;

            --container-max-width: 1280px;
            --section-spacing: 80px;

            --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.06);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08);
            --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.15);

            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-2xl: 32px;

            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
        }

        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
        body {
            font-family: var(--font-body); font-weight: 400; font-size: 16px;
            color: var(--color-gray-800); background-color: #FFFFFF; line-height: 1.65;
            -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden;
        }
        :focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-xs); }
        h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 600; line-height: 1.25; color: var(--color-gray-900); letter-spacing: -0.01em; }
        h1 { font-size: clamp(34px, 5vw, 48px); font-weight: 700; }
        h2 { font-size: clamp(28px, 3.5vw, 38px); font-weight: 700; }
        h3 { font-size: clamp(18px, 2vw, 22px); font-weight: 600; }
        a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: var(--container-max-width); margin: 0 auto; padding: 0 28px; }
        @media (max-width: 640px) { .container { padding: 0 18px; } }

        .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 28px; font-weight: 600; font-size: 15px; border-radius: var(--radius-md); transition: all var(--transition-base); cursor: pointer; border: none; }
        .btn:active { transform: scale(0.97); }
        .btn i { width: 18px; height: 18px; flex-shrink: 0; }
        .btn-primary { background: var(--color-primary); color: #FFFFFF; box-shadow: var(--shadow-sm); }
        .btn-primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .btn-outline-light { background: transparent; color: #FFFFFF; border: 1.5px solid rgba(255,255,255,0.25); }
        .btn-outline-light:hover { border-color: #FFFFFF; background: rgba(255,255,255,0.08); }
        @media (max-width: 480px) { .btn { padding: 12px 20px; font-size: 14px; gap: 6px; } .btn i { width: 16px; height: 16px; } }

        .badge { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; font-size: 13px; font-weight: 500; border-radius: 100px; background: var(--color-primary-bg); color: var(--color-primary); }

        /* 导航 */
        .header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-gray-200); transition: box-shadow var(--transition-base); }
        .header--scrolled { box-shadow: var(--shadow-md); }
        .header-container { display: flex; align-items: center; justify-content: space-between; height: 76px; padding: 0 28px; max-width: var(--container-max-width); margin: 0 auto; gap: 20px; }
        .logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .logo-icon { width: 46px; height: 46px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: #FFFFFF; font-weight: 700; font-size: 22px; box-shadow: 0 2px 8px rgba(255,107,53,0.3); }
        .logo-text { font-size: 22px; font-weight: 700; color: var(--color-gray-900); }
        .logo-text span { color: var(--color-primary); font-weight: 600; }
        .nav-menu { display: flex; align-items: center; gap: 32px; }
        .nav-link { font-weight: 500; font-size: 15px; color: var(--color-gray-700); position: relative; padding: 6px 2px; white-space: nowrap; }
        .nav-link:hover { color: var(--color-primary); }
        .nav-link--active { color: var(--color-primary); font-weight: 600; }
        .nav-link--active::after { content: '';  bottom: -2px; left: 0; right: 0; height: 2.5px; background: var(--color-primary); border-radius: 2px; }
        .header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
        .icon-btn { background: none; border: none; cursor: pointer; color: var(--color-gray-600); padding: 10px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; }
        .icon-btn:hover { background: var(--color-gray-100); color: var(--color-primary); }
        .icon-btn i { width: 20px; height: 20px; }
        .lang-switch { font-size: 13px; font-weight: 500; gap: 4px; padding: 8px 12px; }
        .mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 10px; border-radius: var(--radius-sm); color: var(--color-gray-700); }
        .mobile-menu-btn:hover { background: var(--color-gray-100); color: var(--color-primary); }
        .mobile-menu-btn i { width: 24px; height: 24px; }
        .mobile-nav-overlay { display: none; position: fixed; inset: 0; z-index: 99; background: rgba(15,23,42,0.5); backdrop-filter: blur(2px); opacity: 0; transition: opacity var(--transition-smooth); }
        .mobile-nav-overlay--open { opacity: 1; }
        .mobile-nav-panel { display: none; position: fixed; top: 0; right: 0; z-index: 100; width: min(320px, 85vw); height: 100vh; height: 100dvh; background: #FFFFFF; padding: 24px 28px; overflow-y: auto; box-shadow: var(--shadow-2xl); transform: translateX(100%); transition: transform var(--transition-smooth); }
        .mobile-nav-panel--open { transform: translateX(0); }
        .mobile-nav-panel .mobile-nav-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
        .mobile-nav-panel .mobile-nav-link { display: flex; padding: 14px 16px; font-weight: 500; font-size: 16px; border-radius: var(--radius-md); }
        .mobile-nav-panel .mobile-nav-link:hover { background: var(--color-gray-50); color: var(--color-primary); }
        .mobile-nav-panel .mobile-nav-link--active { color: var(--color-primary); background: var(--color-primary-bg); font-weight: 600; }
        @media (max-width: 1024px) { .nav-menu { display: none; } .mobile-menu-btn { display: flex; } .mobile-nav-overlay { display: block; pointer-events: none; } .mobile-nav-overlay--open { pointer-events: auto; } .mobile-nav-panel { display: block; } }
        @media (max-width: 480px) { .header-container { height: 64px; padding: 0 16px; } .logo-icon { width: 38px; height: 38px; font-size: 18px; border-radius: var(--radius-sm); } .logo-text { font-size: 18px; } .lang-switch span { display: none; } }

        /* ==================== 页面标题区 ==================== */
        .page-hero { padding: 64px 0 36px; text-align: center; position: relative; overflow: hidden; background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%); }
        .page-hero::before { content: ''; position: absolute; top: -200px; right: -300px; width: 600px; height: 600px; background: radial-gradient(circle, rgba(255,107,53,0.06) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
        .page-hero-content { position: relative; z-index: 1; }
        .page-hero-content h1 { font-size: clamp(34px, 5vw, 48px); font-weight: 700; margin-bottom: 12px; display: inline-flex; align-items: center; gap: 16px; }
        .page-hero-content h1 span { color: var(--color-primary); }
        .page-hero-content .title-accent { display: inline-block; width: 40px; height: 4px; background: var(--color-primary); border-radius: 2px; }
        .page-hero-content p { font-size: 18px; color: var(--color-gray-500); max-width: 620px; margin: 12px auto 0; }
        @media (max-width: 640px) { .page-hero { padding: 44px 0 28px; } .page-hero-content p { font-size: 16px; } }

        /* ==================== 锚点导航条 ==================== */
        .section-nav { position: sticky; top: 76px; z-index: 95; background: rgba(255,255,255,0.92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--color-gray-200); box-shadow: var(--shadow-sm); display: flex; justify-content: center; gap: 10px; padding: 14px 0; flex-wrap: wrap; transition: box-shadow var(--transition-base); }
        .section-nav a { padding: 8px 18px; font-size: 14px; font-weight: 500; color: var(--color-gray-600); border-radius: 100px; background: transparent; transition: all var(--transition-fast); white-space: nowrap; }
        .section-nav a:hover { background: var(--color-primary-bg); color: var(--color-primary); }
        @media (max-width: 640px) { .section-nav { top: 64px; gap: 6px; padding: 10px 0; } .section-nav a { padding: 6px 14px; font-size: 13px; } }

        /* ==================== 公司简介区（图文并茂卡片式） ==================== */
        .about-intro { padding: 60px 0 80px; }
        .about-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
        .about-intro-text h2 { margin-bottom: 24px; font-size: 34px; }
        .about-intro-text h2 span { color: var(--color-primary); }
        .feature-list { display: flex; flex-direction: column; gap: 24px; margin-top: 8px; }
        .feature-item { display: flex; gap: 16px; align-items: flex-start; }
        .feature-icon { width: 48px; height: 48px; background: var(--color-primary-bg); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: var(--color-primary); flex-shrink: 0; }
        .feature-icon i { width: 24px; height: 24px; }
        .feature-content h4 { font-size: 18px; margin-bottom: 6px; color: var(--color-gray-900); }
        .feature-content p { font-size: 15px; color: var(--color-gray-600); line-height: 1.7; margin-bottom: 0; }
        .highlight { color: var(--color-primary); font-weight: 600; white-space: nowrap; }
        .about-intro-image { border-radius: var(--radius-2xl); overflow: hidden; box-shadow: var(--shadow-2xl); background: var(--color-gray-100); display: flex; align-items: center; justify-content: center; min-height: 320px; }
        @media (max-width: 1024px) { .about-intro { padding: 40px 0 60px; } .about-intro-grid { grid-template-columns: 1fr; gap: 36px; } .about-intro-image { order: -1; max-width: 480px; margin: 0 auto; } }
        @media (max-width: 640px) { .about-intro { padding: 28px 0 44px; } .about-intro-text h2 { font-size: 28px; } .feature-item { gap: 12px; } .feature-icon { width: 40px; height: 40px; } }

        /* ==================== 发展历程 ==================== */
        .milestones { padding: var(--section-spacing) 0; background: var(--color-gray-50); }
        .milestones h2 { text-align: center; margin-bottom: 48px; }
        .timeline { position: relative; max-width: 900px; margin: 0 auto; padding-left: 30px; }
        .timeline::before { content: ''; position: absolute; left: 15px; top: 10px; bottom: 10px; width: 2px; background: var(--color-gray-300); }
        .timeline-item { position: relative; margin-bottom: 40px; padding-left: 30px; }
        .timeline-item:last-child { margin-bottom: 0; }
        .timeline-item::before { content: ''; position: absolute; left: -23px; top: 6px; width: 12px; height: 12px; background: var(--color-primary); border-radius: 50%; border: 3px solid #FFFFFF; box-shadow: 0 0 0 3px var(--color-primary-light); }
        .timeline-year { font-size: 18px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
        .timeline-content { background: #FFFFFF; border: 1px solid var(--color-gray-200); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow-sm); }
        .timeline-content h4 { font-size: 18px; margin-bottom: 6px; }
        .timeline-content p { font-size: 14px; color: var(--color-gray-600); }

        /* ==================== 核心优势 ==================== */
        .advantages { padding: var(--section-spacing) 0; }
        .advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 48px; }
        .advantage-card { text-align: center; padding: 32px 24px; background: var(--color-gray-50); border-radius: var(--radius-xl); border: 1px solid var(--color-gray-200); transition: all var(--transition-smooth); }
        .advantage-card:hover { box-shadow: var(--shadow-lg); border-color: var(--color-primary-light); transform: translateY(-4px); }
        .advantage-icon { width: 64px; height: 64px; margin: 0 auto 20px; background: var(--color-primary-bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--color-primary); }
        .advantage-icon i { width: 32px; height: 32px; }
        .advantage-card h3 { font-size: 20px; margin-bottom: 12px; }
        .advantage-card p { font-size: 14px; color: var(--color-gray-500); }
        @media (max-width: 768px) { .advantages-grid { grid-template-columns: 1fr; max-width: 400px; margin-left: auto; margin-right: auto; } }

        /* ==================== 资质认证 ==================== */
        .certifications { padding: var(--section-spacing) 0; background: var(--color-gray-900); color: #FFFFFF; }
        .certifications h2, .certifications h3 { color: #FFFFFF; }
        .cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; }
        .cert-card { text-align: center; padding: 28px 16px; background: rgba(255,255,255,0.04); border-radius: var(--radius-lg); border: 1px solid rgba(255,255,255,0.08); transition: all var(--transition-base); }
        .cert-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.2); transform: translateY(-2px); }
        .cert-card i { color: var(--color-primary-light); margin-bottom: 12px; }
        .cert-card h4 { font-size: 16px; color: #FFFFFF; margin-bottom: 6px; }
        .cert-card p { font-size: 13px; color: var(--color-gray-300); }
        @media (max-width: 768px) { .cert-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 480px) { .cert-grid { grid-template-columns: 1fr; max-width: 300px; margin-left: auto; margin-right: auto; } }

        /* ==================== 团队与联系方式 ==================== */
        .team-contact { padding: var(--section-spacing) 0; }
        .team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 48px; }
        .team-card { text-align: center; padding: 24px; background: var(--color-gray-50); border-radius: var(--radius-xl); border: 1px solid var(--color-gray-200); transition: all var(--transition-smooth); }
        .team-card:hover { box-shadow: var(--shadow-lg); border-color: var(--color-primary-light); transform: translateY(-4px); }
        .team-avatar { width: 80px; height: 80px; background: var(--color-gray-300); border-radius: 50%; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; color: var(--color-gray-500); font-size: 24px; font-weight: 700; }
        .team-card h4 { font-size: 18px; margin-bottom: 6px; }
        .team-card p { font-size: 13px; color: var(--color-gray-500); }
        .contact-info { margin-top: 48px; background: var(--color-gray-50); border-radius: var(--radius-xl); padding: 36px 32px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; border: 1px solid var(--color-gray-200); }
        .contact-info-item { display: flex; align-items: flex-start; gap: 14px; }
        .contact-info-item i { color: var(--color-primary); flex-shrink: 0; width: 22px; height: 22px; margin-top: 2px; }
        .contact-info-item h4 { font-size: 16px; margin-bottom: 6px; }
        .contact-info-item p { font-size: 14px; color: var(--color-gray-600); line-height: 1.6; }
        @media (max-width: 768px) { .team-grid { grid-template-columns: 1fr; max-width: 400px; margin-left: auto; margin-right: auto; } .contact-info { grid-template-columns: 1fr; gap: 20px; } }

        /* CTA */
        .cta-strip { padding: 36px 0; text-align: center; background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-secondary) 100%); color: #FFFFFF; }
        .cta-strip .container { display: flex; align-items: center; justify-content: center; gap: 32px; flex-wrap: wrap; }
        .cta-strip h3 { color: #FFFFFF; font-size: 20px; }
        .cta-strip p { color: var(--color-gray-300); font-size: 15px; }

        /* 底部 */
        .footer { background: var(--color-gray-900); color: #FFFFFF; padding: 56px 0 28px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr; gap: 36px; margin-bottom: 44px; }
        .footer-brand p { color: var(--color-gray-400); margin: 18px 0; font-size: 14px; }
        .footer-links h4 { color: #FFFFFF; font-size: 15px; margin-bottom: 18px; font-weight: 600; }
        .footer-links ul li { margin-bottom: 10px; }
        .footer-links ul li a { color: var(--color-gray-400); font-size: 13px; }
        .footer-links ul li a:hover { color: #FFFFFF; }
        .footer-contact h4 { color: #FFFFFF; font-size: 15px; margin-bottom: 18px; }
        .footer-contact p { display: flex; align-items: center; gap: 10px; color: var(--color-gray-400); font-size: 13px; margin-bottom: 10px; }
        .footer-contact p i { width: 16px; height: 16px; opacity: 0.6; }
        .footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); color: var(--color-gray-500); font-size: 12px; }
        @media (max-width: 1024px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; } }

        @keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
        .animate-in { animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) both; }
        .animate-in--delay-1 { animation-delay: 0.1s; }
        .animate-in--delay-2 { animation-delay: 0.2s; }
        @media print { .header, .section-nav, .mobile-nav-overlay, .mobile-nav-panel, .cta-strip, .footer { position: static; } body { font-size: 12pt; } }