/* ============================================
   skrbt - 磁力官网 | 独特设计系统
   风格：柔光渐变 + 杂志层叠 + 青瓷色调
   ============================================ */

/* 基础重置 */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
body { font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; overflow-x:hidden; background:#f5f9fc; color:#1a2e3c; }

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:linear-gradient(135deg, #eaf4f0 0%, #f0f7f5 100%); }

/* 导航 — 固定顶部，柔光玻璃态 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(245,249,252,0.88); backdrop-filter:blur(24px) saturate(1.2); border-bottom:1px solid rgba(100,160,140,0.15); }
.header-inner { display:flex; align-items:center; justify-content:space-between; height:68px; max-width:1200px; margin:0 auto; padding:0 24px; }
.logo { display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.25rem; text-decoration:none; color:#1a2e3c; letter-spacing:-0.3px; }
.logo-icon { width:38px; height:38px; border-radius:50%; background:linear-gradient(135deg, #6fc1b0, #4a9e8a); display:flex; align-items:center; justify-content:center; font-size:1rem; color:#fff; box-shadow:0 4px 12px rgba(79,158,138,0.3); }
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.9rem; font-weight:500; color:#3a5a6a; transition:0.3s; position:relative; padding:4px 0; }
.main-nav a::after { content:''; position:absolute; bottom:0; left:0; width:0; height:2px; background:#4a9e8a; transition:0.3s; border-radius:2px; }
.main-nav a:hover { color:#1a2e3c; }
.main-nav a:hover::after { width:100%; }
.nav-cta { padding:8px 22px; border-radius:30px; background:linear-gradient(135deg, #6fc1b0, #4a9e8a); color:#fff!important; font-weight:600; box-shadow:0 4px 14px rgba(79,158,138,0.25); transition:0.3s; }
.nav-cta:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(79,158,138,0.35); }
.nav-cta::after { display:none!important; }
.menu-toggle { display:none; }

/* 首页Hero — 杂志封面感，大字号+青瓷渐变 */
.hero { min-height:75vh; display:flex; align-items:center; position:relative; overflow:hidden; background:linear-gradient(160deg, #e8f3ef 0%, #d4e8e2 50%, #c3dbd3 100%); }
.hero::before { content:''; position:absolute; top:-20%; right:-10%; width:500px; height:500px; border-radius:50%; background:radial-gradient(circle, rgba(106,193,176,0.15), transparent 70%); pointer-events:none; }
.hero-content { max-width:720px; position:relative; z-index:2; }
.hero-eyebrow { display:inline-block; font-size:0.8rem; font-weight:600; letter-spacing:3px; padding:4px 16px; border-radius:30px; background:rgba(79,158,138,0.12); color:#3a7a6a; margin-bottom:16px; text-transform:uppercase; }
.hero h1 { font-size:3.2rem; line-height:1.15; margin-bottom:20px; font-weight:800; color:#0e2a36; letter-spacing:-1px; }
.hero p { font-size:1.15rem; opacity:0.65; max-width:540px; margin-bottom:36px; line-height:1.7; color:#2a4a5a; }
.hero-buttons { display:flex; gap:16px; }
.hero-image { border-radius:16px; overflow:hidden; box-shadow:0 20px 40px -12px rgba(0,0,0,0.12); }
.hero-image img { width:100%; height:auto; display:block; }

/* 按钮 — 青瓷系 */
.btn { display:inline-flex; align-items:center; gap:8px; padding:14px 32px; border-radius:40px; font-weight:600; cursor:pointer; border:none; text-decoration:none; transition:0.3s; font-size:0.95rem; }
.btn-primary { background:linear-gradient(135deg, #6fc1b0, #4a9e8a); color:#fff; box-shadow:0 4px 16px rgba(79,158,138,0.3); }
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 8px 28px rgba(79,158,138,0.4); }
.btn-outline { background:transparent; border:2px solid #4a9e8a; color:#2a5a4a; }
.btn-outline:hover { background:rgba(74,158,138,0.08); transform:translateY(-2px); }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.75rem; font-weight:600; letter-spacing:3px; text-transform:uppercase; color:#4a9e8a; margin-bottom:12px; }
.section-title { font-size:2.2rem; margin-bottom:14px; font-weight:700; color:#0e2a36; letter-spacing:-0.5px; }
.section-desc { max-width:600px; opacity:0.65; margin-bottom:44px; line-height:1.7; color:#3a5a6a; }

/* 卡片网格 — 层叠卡片，微光影 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:28px; }
.category-card { border-radius:16px; padding:32px 28px; background:#fff; border:1px solid rgba(100,160,140,0.12); transition:0.4s; position:relative; overflow:hidden; box-shadow:0 2px 8px rgba(0,0,0,0.02); }
.category-card::before { content:''; position:absolute; top:0; left:0; width:100%; height:4px; background:linear-gradient(90deg, #6fc1b0, #4a9e8a); opacity:0; transition:0.4s; }
.category-card:hover { transform:translateY(-6px); box-shadow:0 16px 40px -8px rgba(79,158,138,0.18); border-color:rgba(100,160,140,0.25); }
.category-card:hover::before { opacity:1; }
.card-icon { width:52px; height:52px; border-radius:14px; background:linear-gradient(135deg, #e8f3ef, #d4e8e2); display:flex; align-items:center; justify-content:center; margin-bottom:18px; font-size:1.4rem; color:#3a7a6a; }
.card-link { font-weight:600; font-size:0.85rem; text-decoration:none; color:#4a9e8a; display:inline-flex; align-items:center; gap:6px; transition:0.3s; }
.card-link:hover { gap:10px; color:#2a5a4a; }

/* 特性块 — 不对称布局，杂志风 */
.feature-block { display:grid; grid-template-columns:1.1fr 0.9fr; gap:60px; align-items:center; }
.feature-image { border-radius:16px; overflow:hidden; box-shadow:0 12px 32px -8px rgba(0,0,0,0.08); }
.feature-image img { width:100%; height:auto; display:block; transition:0.6s; }
.feature-image:hover img { transform:scale(1.03); }
.feature-text { }
.feature-list { list-style:none; margin-top:20px; }
.feature-list li { padding:8px 0; display:flex; align-items:center; gap:10px; font-size:0.95rem; color:#2a4a5a; }
.feature-list li::before { content:'✦'; font-weight:400; color:#4a9e8a; font-size:1.1rem; }

/* 数据条 — 青瓷数字墙 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item { padding:32px 20px; border-radius:16px; background:#fff; border:1px solid rgba(100,160,140,0.1); box-shadow:0 2px 8px rgba(0,0,0,0.02); transition:0.3s; }
.stat-item:hover { transform:translateY(-4px); box-shadow:0 12px 28px -8px rgba(79,158,138,0.12); }
.stat-number { font-size:2.6rem; font-weight:800; color:#0e2a36; letter-spacing:-1px; line-height:1; }
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:8px; color:#3a5a6a; }

/* 内容墙 — 新闻/资讯卡片 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:28px; }
.content-wall-item { border-radius:16px; overflow:hidden; background:#fff; border:1px solid rgba(100,160,140,0.1); transition:0.4s; box-shadow:0 2px 8px rgba(0,0,0,0.02); }
.content-wall-item:hover { transform:translateY(-6px); box-shadow:0 16px 40px -8px rgba(79,158,138,0.15); }
.content-wall-item img { width:100%; height:210px; object-fit:cover; display:block; }
.content-wall-body { padding:22px 24px 24px; }
.content-wall-body h4 { font-size:1.1rem; margin-bottom:8px; color:#0e2a36; }
.content-wall-body p { font-size:0.9rem; opacity:0.6; line-height:1.6; }

/* FAQ — 简约折叠 */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(100,160,140,0.15); border-radius:14px; margin-bottom:10px; overflow:hidden; cursor:pointer; background:#fff; transition:0.3s; }
.faq-item:hover { border-color:rgba(100,160,140,0.3); }
.faq-item .faq-question { padding:18px 22px; font-weight:600; display:flex; justify-content:space-between; align-items:center; color:#1a2e3c; font-size:1rem; }
.faq-item .faq-question::after { content:'+'; font-size:1.3rem; color:#4a9e8a; transition:0.3s; }
.faq-item.open .faq-question::after { content:'−'; }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:0.7; line-height:1.7; color:#3a5a6a; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 — 青瓷渐变冲击 */
.cta-banner { padding:64px 32px; text-align:center; border-radius:20px; background:linear-gradient(135deg, #4a9e8a, #6fc1b0, #8ad4c0); color:#fff; position:relative; overflow:hidden; }
.cta-banner::before { content:''; position:absolute; top:-30%; right:-20%; width:400px; height:400px; border-radius:50%; background:rgba(255,255,255,0.06); pointer-events:none; }
.cta-banner h2 { color:#fff; font-size:2rem; font-weight:700; margin-bottom:12px; }
.cta-banner p { color:rgba(255,255,255,0.8); margin-bottom:28px; }
.cta-banner .btn-primary { background:#fff; color:#2a5a4a; box-shadow:0 4px 16px rgba(0,0,0,0.1); }
.cta-banner .btn-primary:hover { background:rgba(255,255,255,0.9); transform:translateY(-3px); }

/* 页脚 — 深青调性，非黑 */
.site-footer { padding:60px 0 32px; background:#1a2e3c; color:#c8dcd6; }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-brand .logo { color:#e0f0ea; }
.footer-brand p { opacity:0.6; line-height:1.7; margin-top:12px; font-size:0.9rem; }
.footer-col h5 { color:#e0f0ea; font-size:0.95rem; font-weight:600; margin-bottom:16px; }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:10px; }
.footer-col ul a { color:#a0b8b0; text-decoration:none; font-size:0.9rem; transition:0.3s; }
.footer-col ul a:hover { color:#6fc1b0; }
.footer-bottom { border-top:1px solid rgba(200,220,210,0.1); margin-top:44px; padding-top:20px; text-align:center; font-size:0.85rem; opacity:0.5; }

/* 工具类 */
.text-accent { color:#4a9e8a; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.65; line-height:1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size:2.2rem; }
  .feature-block { grid-template-columns:1fr; gap:40px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); gap:16px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; background:none; border:none; font-size:1.4rem; cursor:pointer; color:#1a2e3c; padding:8px; }
  .main-nav.open { display:flex; flex-direction:column; position:absolute; top:68px; left:0; width:100%; background:rgba(245,249,252,0.98); backdrop-filter:blur(12px); padding:24px 28px; gap:16px; border-bottom:1px solid rgba(100,160,140,0.15); }
  .main-nav.open a { font-size:1.05rem; }
  .section-title { font-size:1.8rem; }
}

@media (max-width: 480px) {
  .cards-grid, .content-wall, .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .hero-buttons { flex-direction:column; gap:12px; }
  .hero h1 { font-size:1.8rem; }
  .stat-number { font-size:2rem; }
  .cta-banner { padding:40px 20px; }
}