:root {
            --primary: #1B6B8F;
            --primary-dark: #0F4A66;
            --primary-light: #E3F0F5;
            --accent: #D97706;
            --accent-light: #FDF1E3;
            --bg: #F7FAFC;
            --surface: #FFFFFF;
            --text: #1E2A3A;
            --text-light: #5A7184;
            --border: #DCE8EE;
            --shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.10);
            --radius: 16px;
            --radius-sm: 10px;
            --font: 'Microsoft Sans Serif', 'Microsoft YaHei', 'PingFang SC', sans-serif;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; scroll-behavior: smooth; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        .site-shell { min-height: 100vh; display: flex; flex-direction: column; }
        
        /* topbar */
        .topbar { background: var(--primary-dark); color: #C9E2ED; font-size: 0.8rem; padding: 10px 0; }
        .topbar__inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
        .topbar__inner span { letter-spacing: 0.02em; }
        
        /* header */
        .header { background: var(--surface); box-shadow: 0 2px 12px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border); }
        .header__inner { display: flex; justify-content: space-between; align-items: center; padding: 16px 28px; max-width: 1280px; margin: 0 auto; }
        .brand { display: flex; align-items: center; gap: 12px; }
        .brand__mark { width: 42px; height: 42px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); display: flex; align-items: center; justify-content: center; }
        .brand__mark::after { content: '抖'; font-size: 20px; color: #fff; font-weight: 700; }
        .brand__text strong { font-size: 1.3rem; font-weight: 700; color: var(--primary-dark); letter-spacing: 0.01em; }
        .brand__text span { font-size: 0.78rem; color: var(--text-light); display: block; letter-spacing: 0.04em; }
        .nav { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
        .nav a { font-size: 0.92rem; color: var(--text); font-weight: 500; transition: color 0.2s; }
        .nav a:hover { color: var(--primary); }
        .nav .about-link { background: var(--primary); color: #fff; padding: 6px 16px; border-radius: 30px; font-size: 0.88rem; transition: all 0.25s; }
        .nav .about-link:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); }
        
        /* hero */
        .hero { background: linear-gradient(135deg, #EAF2F7 0%, #D7E8F1 60%, #CBE1ED 100%); padding: 76px 0; position: relative; overflow: hidden; }
        .hero::before { content: ''; position: absolute; top: -120px; right: -80px; width: 320px; height: 320px; background: rgba(27,107,143,0.08); border-radius: 50%; }
        .hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; max-width: 1280px; margin: 0 auto; padding: 0 28px; }
        .eyebrow { display: inline-block; background: var(--accent-light); color: var(--accent); font-size: 0.8rem; font-weight: 600; padding: 6px 16px; border-radius: 30px; margin-bottom: 18px; letter-spacing: 0.03em; }
        .hero-copy h1 { font-size: 2.9rem; line-height: 1.2; font-weight: 800; color: var(--primary-dark); margin-bottom: 20px; letter-spacing: -0.02em; }
        .hero-copy > p { font-size: 1.05rem; color: var(--text-light); max-width: 560px; margin-bottom: 28px; }
        .chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
        .chip-row span { background: var(--surface); border: 1px solid var(--border); border-radius: 30px; padding: 6px 14px; font-size: 0.78rem; color: var(--text-light); transition: border-color 0.2s; }
        .chip-row span:hover { border-color: var(--primary); color: var(--primary); }
        .keyword-row { display: flex; flex-wrap: wrap; gap: 8px; }
        .keyword-row span { background: transparent; border: 1px dashed var(--primary); border-radius: 20px; padding: 4px 12px; font-size: 0.75rem; color: var(--primary); }
        
        .hero-panel { background: var(--surface); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
        .metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 24px; }
        .metric-item { background: var(--bg); border-radius: var(--radius-sm); padding: 18px 14px; text-align: center; }
        .metric-item strong { display: block; font-size: 1.7rem; color: var(--primary); font-weight: 700; line-height: 1.2; }
        .metric-item span { font-size: 0.8rem; color: var(--text-light); }
        .hero-contact { border-top: 1px solid var(--border); padding-top: 22px; }
        .hero-contact strong { font-size: 1rem; color: var(--text); display: block; margin-bottom: 8px; }
        .hero-contact a { display: inline-block; font-size: 1.5rem; font-weight: 700; color: var(--primary); margin-bottom: 10px; letter-spacing: 0.02em; }
        .hero-contact a:hover { color: var(--accent); }
        .hero-contact p { font-size: 0.86rem; color: var(--text-light); margin-bottom: 10px; }
        
        /* sections */
        .section { padding: 76px 0; }
        .section-head { text-align: center; margin-bottom: 52px; }
        .section-head h2 { font-size: 2.2rem; font-weight: 700; color: var(--primary-dark); letter-spacing: -0.01em; }
        .section-head span { display: block; font-size: 0.8rem; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.1em; margin-top: 6px; }
        
        /* about */
        .surface-card { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); padding: 48px; }
        .about-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
        .about-copy p { margin-bottom: 16px; font-size: 0.98rem; color: var(--text-light); }
        .about-copy p strong { color: var(--text); }
        .about-figure img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
        .about-figure figcaption { font-size: 0.85rem; color: var(--text-light); text-align: center; margin-top: 12px; }
        
        /* strengths */
        .strength-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .strength-card { background: var(--surface); border-radius: var(--radius); padding: 32px 26px; border: 1px solid var(--border); box-shadow: var(--shadow); transition: all 0.3s ease; }
        .strength-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
        .strength-card .icon { font-size: 2.2rem; margin-bottom: 16px; }
        .strength-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; color: var(--text); }
        .strength-card p { font-size: 0.9rem; color: var(--text-light); }
        
        /* gallery */
        .gallery-stack { display: flex; flex-direction: column; gap: 56px; }
        .gallery-group { background: var(--surface); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); border: 1px solid var(--border); }
        .gallery-group-title { font-size: 1.3rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 26px; padding-left: 14px; border-left: 4px solid var(--accent); }
        .gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
        .gallery-card { background: var(--bg); border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border); transition: all 0.3s ease; }
        .gallery-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .gallery-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
        .gallery-card p { padding: 12px 14px; font-size: 0.85rem; color: var(--text-light); line-height: 1.4; }
        
        /* faq */
        .faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
        .faq-item { background: var(--surface); border-radius: var(--radius-sm); padding: 26px; border: 1px solid var(--border); box-shadow: var(--shadow); }
        .faq-item h3 { font-size: 1.05rem; color: var(--primary-dark); margin-bottom: 10px; font-weight: 600; }
        .faq-item p { font-size: 0.9rem; color: var(--text-light); }
        
        /* cta */
        .cta-panel { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); border-radius: var(--radius); padding: 56px; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; color: #fff; }
        .cta-copy .eyebrow { background: rgba(255,255,255,0.15); color: #fff; }
        .cta-copy h2 { font-size: 1.9rem; font-weight: 700; margin-bottom: 14px; }
        .cta-copy p { opacity: 0.85; font-size: 0.95rem; margin-bottom: 20px; max-width: 600px; }
        .contact-list { list-style: none; margin-top: 18px; }
        .contact-list li { margin-bottom: 8px; font-size: 0.95rem; }
        .cta-contact { background: rgba(255,255,255,0.1); border-radius: var(--radius); padding: 32px; backdrop-filter: blur(4px); }
        .cta-contact strong { display: block; font-size: 1rem; margin-bottom: 12px; }
        .cta-contact > a { display: inline-block; font-size: 1.6rem; font-weight: 700; margin-bottom: 16px; color: #fff; }
        .cta-contact > a:hover { color: var(--accent-light); }
        .cta-contact__meta { border-top: 1px solid rgba(255,255,255,0.2); padding-top: 16px; display: flex; gap: 28px; flex-wrap: wrap; }
        .cta-contact__meta div { flex: 1; min-width: 120px; }
        .cta-contact__meta span { display: block; font-size: 0.78rem; opacity: 0.7; margin-bottom: 4px; }
        .cta-contact__meta strong { font-size: 0.95rem; margin: 0; }
        
        /* footer */
        .footer { background: var(--primary-dark); color: #C9E2ED; padding: 44px 0 24px; margin-top: auto; }
        .footer__inner { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
        .footer-copy p { font-size: 0.85rem; margin-bottom: 10px; opacity: 0.85; }
        .friend-links-row { margin-top: 28px; border-top: 1px solid rgba(255,255,255,0.15); padding-top: 22px; }
        .friend-links__inner { display: flex; flex-wrap: wrap; gap: 8px 16px; }
        .friend-links__inner a { font-size: 0.78rem; opacity: 0.6; transition: opacity 0.2s; }
        .friend-links__inner a:hover { opacity: 1; }
        .footer p:last-child { font-size: 0.75rem; opacity: 0.5; margin-top: 16px; }
        
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 40px; }
            .about-grid { grid-template-columns: 1fr; }
            .strength-grid { grid-template-columns: repeat(2, 1fr); }
            .gallery-grid { grid-template-columns: repeat(3, 1fr); }
            .cta-panel { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .header__inner { flex-direction: column; gap: 14px; }
            .nav { justify-content: center; gap: 16px; }
            .hero-copy h1 { font-size: 2rem; }
            .section { padding: 52px 0; }
            .strength-grid { grid-template-columns: 1fr; }
            .gallery-grid { grid-template-columns: repeat(2, 1fr); }
            .faq-grid { grid-template-columns: 1fr; }
            .surface-card { padding: 24px; }
            .cta-panel { padding: 32px; }
            .metric-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            .gallery-grid { grid-template-columns: 1fr; }
        }
    

.friend-links-row{display:block !important;width:100%;margin:18px 0 0;clear:both;}
.friend-links{display:block !important;width:100%;box-sizing:border-box;}
.friend-links__inner{display:flex;flex-wrap:wrap;align-items:center;gap:6px 12px;width:100%;}
.friend-links__inner a{display:inline-block;font-size:12px;line-height:1.6;padding:0;color:inherit;text-decoration:none;opacity:.88;}
.friend-links__inner a:hover{text-decoration:underline;opacity:1;}
@media (max-width: 768px){
  .friend-links-row{margin-top:14px;}
  .friend-links__inner{gap:5px 10px;}
  .friend-links__inner a{font-size:11px;line-height:1.7;}
}