@charset "UTF-8";

/* ================= 基础重置与变量 ================= */
:root {
  --brand: #d02b2b;         
  --brand-light: #e85d5d;   
  --text-main: #111111;
  --text-sec: #444444;
  --text-muted: #888888;
  --bg-base: #f8fafc; 
  --bg-card: #ffffff;
  --border: #eaeaea;
  --nav-hover-bg: #f4f4f5;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { 
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif; 
  color: var(--text-sec); 
  line-height: 1.8; 
  background: var(--bg-base); 
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ================= 1. 顶部阅读进度条 ================= */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; background: var(--brand);
  width: 0%; z-index: 999; box-shadow: 0 0 10px rgba(208, 43, 43, 0.6);
  transition: width 0.1s ease-out;
}

/* ================= 顶部导航 ================= */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: #ffffff; 
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 76px; 
  display: flex; justify-content: space-between; align-items: center;
}

.logo { 
  height: 42px; width: auto; max-width: 160px; object-fit: contain; mix-blend-mode: multiply; flex-shrink: 0; 
}

.nav-links { display: flex; gap: 4px; }
.nav-links a { 
  font-size: 15px; font-weight: 500; color: var(--text-main); 
  position: relative; white-space: nowrap; padding: 8px 16px; border-radius: 6px;
  z-index: 1; transition: color 0.3s, transform 0.3s;
}
.nav-links a::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: var(--nav-hover-bg); border-radius: 6px; z-index: -1;
  transform: scale(0.8); opacity: 0; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-links a:hover::before { transform: scale(1); opacity: 1; }
.nav-links a:hover { color: var(--brand); transform: translateY(-1px); }

/* 选中状态 */
.nav-links a.active { color: var(--brand); font-weight: 600; background: transparent; }
.nav-links a.active::before { display: none; }
.nav-links a.active:hover { color: var(--brand); transform: translateY(-1px) scale(1.02); }
.nav-links a.active::after {
  content: ""; position: absolute; bottom: 0px; left: 50%; transform: translateX(-50%);
  width: 24px; height: 3px; background: var(--brand); border-radius: 2px; transition: all 0.3s ease;
}

/* ================= 右侧操作区 ================= */
.header-actions { display: flex; align-items: center; gap: 20px; flex-shrink: 0; }
.header-phone { display: flex; align-items: center; gap: 8px; font-size: 17px; font-weight: 700; color: var(--brand); }
.header-phone svg { width: 18px; height: 18px; fill: var(--brand); }

.btn-header {
  background: var(--brand-light); color: #ffffff; padding: 10px 20px; border-radius: 6px;
  font-size: 15px; font-weight: 600; white-space: nowrap; cursor: pointer;
  border: none; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-header:hover { background: var(--brand); color: #ffffff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(208, 43, 43, 0.3); }

/* ================= 首屏 Banner 区 ================= */
.hero-banner {
  margin-top: 76px; position: relative; height: 65vh; min-height: 500px;
  display: flex; align-items: center; justify-content: center; text-align: center; color: #fff;
  background-image: linear-gradient(135deg, rgba(11, 17, 32, 0.88), rgba(15, 23, 42, 0.75)), url('../images/banner.jpg');
  background-size: cover; background-position: center; background-repeat: no-repeat; background-attachment: fixed;
}
.banner-content { max-width: 900px; padding: 0 24px; position: relative; z-index: 2; }
.banner-tag { display: inline-block; font-size: 13px; letter-spacing: 3px; font-weight: 600; text-transform: uppercase; margin-bottom: 24px; color: rgba(255,255,255,0.8); border-bottom: 1px solid rgba(255,255,255,0.3); padding-bottom: 4px; }
.banner-title { font-size: 52px; font-weight: 700; line-height: 1.2; margin-bottom: 24px; letter-spacing: -1px; text-shadow: 0 4px 12px rgba(0,0,0,0.3); }
.banner-summary { font-size: 18px; color: rgba(255,255,255,0.9); max-width: 680px; margin: 0 auto 40px; line-height: 1.8; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.banner-meta { font-size: 14px; color: rgba(255,255,255,0.7); display: flex; justify-content: center; gap: 32px; }

/* ================= 面包屑导航 ================= */
.breadcrumb-wrap { 
  max-width: 880px; margin: 0 auto; padding: 16px 24px; background: transparent; 
}
.breadcrumb { 
  font-size: 14px; color: var(--text-muted); display: flex; align-items: center; flex-wrap: wrap; gap: 8px; line-height: 1.5;
}
.breadcrumb a { color: var(--text-sec); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .bc-label { color: var(--text-muted); }
.breadcrumb .bc-sep { color: #cbd5e1; font-family: monospace; }
.breadcrumb .bc-current { color: var(--text-main); font-weight: 600; }

/* ================= GEO 速览数据区 ================= */
.facts-bar { 
  background: #ffffff; 
  background-image: radial-gradient(circle at 50% 0%, #fff5f5 0%, #ffffff 60%);
  border-bottom: 1px solid var(--border); 
  border-top: 1px solid rgba(0,0,0,0.02);
  position: relative; z-index: 10; 
  box-shadow: 0 15px 30px -15px rgba(0,0,0,0.06);
}

.facts-grid { 
  display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1000px; margin: 0 auto; padding: 40px 24px; 
}

.fact-item { text-align: center; position: relative; }

.fact-item::after {
  content: ""; position: absolute; right: 0; top: 20%; bottom: 20%; width: 1px;
  background: linear-gradient(180deg, transparent, #e2e8f0 50%, transparent);
}
.fact-item:last-child::after { display: none; }

.fact-label { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; letter-spacing: 0.5px; }
.fact-value { font-size: 18px; font-weight: 700; color: var(--brand); text-shadow: 0 2px 4px rgba(208, 43, 43, 0.1); }

/* ================= 正文内容区（卡片化） ================= */
.main-content { max-width: 880px; margin: -30px auto 80px; padding: 0 24px; position: relative; z-index: 15; }

.article-body { 
  background: var(--bg-card); padding: 60px 64px; border-radius: 16px; 
  box-shadow: 0 10px 40px -10px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.02);
  border: 1px solid #f1f5f9;
}

.article-body p { font-size: 17px; color: var(--text-sec); margin-bottom: 28px; line-height: 1.9; }
.article-body strong { color: var(--text-main); font-weight: 600; }

.geo-summary {
  background: #fff5f5; border-left: 4px solid var(--brand); border-radius: 0 8px 8px 0;
  padding: 20px 24px; margin-bottom: 40px; font-size: 16px; color: #333; line-height: 1.8;
}
.geo-summary strong { color: var(--brand); }

.article-body h2 { 
  font-size: 30px; font-weight: 700; color: var(--text-main); margin: 72px 0 32px; 
  letter-spacing: -0.5px; display: flex; align-items: center; gap: 16px;
}
.article-body h2:first-child { margin-top: 0; }
.article-body h2::before {
  content: ""; display: inline-block; width: 6px; height: 26px; 
  background: var(--brand); border-radius: 3px; flex-shrink: 0;
}
.article-body h2::after {
  content: ""; flex-grow: 1; height: 1px; border-top: 1.5px dashed #d1d5db; margin-top: 2px;
}

.article-body h3 { 
  font-size: 22px; font-weight: 600; color: var(--text-main); 
  margin: 48px 0 24px; padding-bottom: 12px; border-bottom: 1px solid var(--border); 
}

.article-list { list-style: none; margin-bottom: 28px; }
.article-list li { position: relative; padding-left: 20px; margin-bottom: 16px; font-size: 17px; }
.article-list li::before { content: ""; position: absolute; left: 0; top: 12px; width: 6px; height: 6px; background: var(--brand); border-radius: 50%; }

/* ================= 图片与高级浏览器窗口框 ================= */
figure { margin: 60px 0; }
.mac-window {
  background: #fff; border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.05);
  transition: box-shadow 0.4s ease, transform 0.4s ease;
  overflow: hidden; border: 1px solid var(--border);
}
.mac-header {
  background: #f1f2f4; height: 36px; display: flex; align-items: center;
  padding: 0 16px; gap: 8px; border-bottom: 1px solid var(--border);
}
.mac-dot { width: 10px; height: 10px; border-radius: 50%; }
.mac-dot.red { background: #ff5f56; }
.mac-dot.yellow { background: #ffbd2e; }
.mac-dot.green { background: #27c93f; }
.img-wrapper { width: 100%; background: #fff; line-height: 0; overflow: hidden; cursor: zoom-in; display: block; }
figure img { width: 100%; height: auto; display: block; transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.mac-window:hover img { transform: scale(1.04); }
.mac-window:hover {
  box-shadow: 0 20px 40px rgba(0,0,0,0.12), 0 2px 6px rgba(0,0,0,0.05);
  transform: translateY(-4px);
}
figcaption { text-align: center; font-size: 14px; color: var(--text-muted); margin-top: 16px; }

/* ================= 热点案例推荐区 ================= */
.hot-cases-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 60px; }
.hot-case-card {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; transition: all 0.3s ease; display: flex; flex-direction: column;
}
.hot-case-card:hover { transform: translateY(-5px); box-shadow: 0 12px 24px rgba(0,0,0,0.08); border-color: #d1d5db; }
.hot-img { width: 100%; aspect-ratio: 16/9; overflow: hidden; background: var(--bg-base); }
.hot-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.hot-case-card:hover .hot-img img { transform: scale(1.06); }
.hot-info { padding: 20px; background: #fff; flex-grow: 1; }
.hot-tag { display: inline-block; padding: 4px 8px; background: #fef2f2; color: var(--brand); font-size: 12px; font-weight: 600; border-radius: 4px; margin-bottom: 12px; }
.hot-info h4 { font-size: 16px; color: var(--text-main); margin-bottom: 8px; font-weight: 600; line-height: 1.5; }
.hot-info p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* ================= 中段微转化横幅 ================= */
.mid-cta-banner {
  background: linear-gradient(90deg, #111827, #1e293b);
  border-radius: 12px; padding: 24px 32px;
  display: flex; justify-content: space-between; align-items: center;
  margin: 60px 0; color: #fff; box-shadow: 0 10px 20px -10px rgba(0,0,0,0.2);
}
.mid-cta-banner h4 { font-size: 18px; font-weight: 600; margin-bottom: 4px; }
.mid-cta-banner p { font-size: 14px; color: #94a3b8; margin: 0; }
.mid-cta-btn {
  background: var(--brand); color: #fff; padding: 10px 24px; border-radius: 6px;
  font-size: 15px; font-weight: 600; white-space: nowrap; cursor: pointer; border: none; transition: all 0.3s;
}
.mid-cta-btn:hover { background: #b52222; transform: translateY(-2px); }

/* ================= 高端 CTA 转化区 ================= */
.cta-section { 
  background: radial-gradient(circle at 50% 0%, #fff5f5 0%, #ffffff 80%);
  border: 1px solid #fee2e2; border-radius: 16px; padding: 64px 40px; 
  text-align: center; margin: 80px 0 0; position: relative; overflow: hidden;
  box-shadow: 0 20px 40px -20px rgba(208, 43, 43, 0.08);
}
.cta-section::before {
  content: ""; position: absolute; top: 0; left: 15%; right: 15%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
}
.cta-section h3 { font-size: 30px; color: var(--text-main); margin-bottom: 16px; border: none; justify-content: center; letter-spacing: -0.5px; }
.cta-section h3 span { color: var(--brand); }
.cta-section p { color: var(--text-sec); margin-bottom: 36px; font-size: 16px; }

.cta-btns { display: flex; justify-content: center; gap: 16px; }
.btn-cta { 
  padding: 14px 36px; font-size: 16px; font-weight: 600; border-radius: 8px; border: none; cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); display: inline-flex; align-items: center; justify-content: center;
}
.btn-cta.primary { background: linear-gradient(135deg, #e53935, #d02b2b); color: #fff; box-shadow: 0 8px 20px -6px rgba(208, 43, 43, 0.4); }
.btn-cta.primary:hover { transform: translateY(-3px); box-shadow: 0 12px 24px -6px rgba(208, 43, 43, 0.5); color: #fff; }
.btn-cta.secondary { background: #ffffff; color: var(--text-main); border: 1px solid #e2e8f0; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02); }
.btn-cta.secondary:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-3px); box-shadow: 0 8px 16px -4px rgba(0,0,0,0.05); }

/* ================= FAQ 折叠面板 ================= */
.faq-section { margin-top: 48px; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { padding: 24px 0; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; transition: color 0.3s; }
.faq-q::-webkit-details-marker { display: none; }
.faq-title-wrap { display: flex; align-items: center; gap: 16px; }
.faq-num { font-family: Georgia, serif; font-size: 18px; font-weight: 700; color: var(--brand); letter-spacing: 1px; }
.faq-text { font-size: 18px; font-weight: 600; color: var(--text-main); transition: color 0.3s; }
.faq-q:hover .faq-text { color: var(--brand); }
.faq-q::after { content: "+"; font-size: 24px; color: var(--text-muted); font-weight: 300; transition: 0.3s; }
.faq-item[open] .faq-q::after { content: "−"; color: var(--brand); }
.faq-a { padding-bottom: 24px; font-size: 16px; color: var(--text-sec); padding-left: 42px; }

/* 相关文章推荐区 */
.related-articles { margin-top: 60px; padding-top: 24px; border-top: 1px dashed var(--border); }
.related-articles h3 { font-size: 18px; color: var(--text-main); margin-bottom: 16px; font-weight: 600; }
.related-articles ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.related-articles ul li a { color: var(--brand); font-size: 16px; display: inline-flex; align-items: center; }
.related-articles ul li a::before { content: "•"; margin-right: 8px; color: #d1d5db; }

/* ================= 高端页脚 ================= */
.site-footer { 
  background-color: #0b1120; 
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(208, 43, 43, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(255, 255, 255, 0.04) 0%, transparent 40%),
    linear-gradient(180deg, #0f172a 0%, #080c14 100%);
  position: relative; color: #94a3b8; padding: 80px 0 40px; font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.05); 
}
.site-footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12) 50%, transparent);
}
.site-footer::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 40px 40px; pointer-events: none; z-index: 0;
}
.site-footer .container { position: relative; z-index: 1; } 
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 60px; }
.footer-logo { height: 40px; width: auto; background: #fff; padding: 4px 8px; border-radius: 4px; margin-bottom: 24px; }
.footer-desc { max-width: 320px; line-height: 1.8; color: #94a3b8; }
.footer-col h4 { color: #f1f5f9; font-size: 16px; margin-bottom: 24px; font-weight: 600; letter-spacing: 0.5px; }
.footer-col h4 a { color: #f1f5f9; text-decoration: none; transition: color 0.3s ease; }
.footer-col h4 a:hover { color: var(--brand-light); }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 12px; color: #94a3b8; }
.footer-col ul a { color: #94a3b8; }
.footer-col ul a:hover { color: #ffffff; }
.footer-bottom { 
  border-top: 1px solid rgba(255, 255, 255, 0.08); 
  padding-top: 32px; display: flex; justify-content: space-between; align-items: center; 
  flex-wrap: wrap; gap: 16px; font-size: 13px; color: #64748b; 
}
.footer-bottom .links { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.footer-bottom .links a { color: #94a3b8; }
.footer-bottom .links a:hover { color: #ffffff; }
.footer-bottom .links .divider { color: #334155; }
.footer-bottom .copyright { color: #64748b; }
.footer-bottom .beian a { color: #64748b; }
.footer-bottom .beian a:hover { color: #94a3b8; }

/* 移动端菜单按钮 */
.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--text-main); margin: 5px 0; transition: 0.3s; }

/* ================= PC端侧边悬浮咨询窗 ================= */
.pc-sticky-cta {
  position: fixed; right: 30px; top: 50%; transform: translateY(-50%); z-index: 99;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); padding: 24px 20px; border-radius: 16px; 
  box-shadow: 0 10px 40px -10px rgba(0,0,0,0.15); text-align: center; border: 1px solid #eee;
  display: none; 
}
.pc-sticky-cta h4 { font-weight: 700; color: var(--text-main); margin-bottom: 8px; font-size: 16px; }
.pc-sticky-cta p { color: var(--text-muted); font-size: 13px; margin-bottom: 16px; line-height: 1.5; }
.pc-sticky-cta button {
  background: var(--brand); color: #fff; padding: 10px 20px; border-radius: 8px; font-size: 14px;
  font-weight: 600; width: 100%; border: none; cursor: pointer; transition: 0.3s;
}
.pc-sticky-cta button:hover { background: #b52222; box-shadow: 0 4px 12px rgba(208,43,43,0.3); }

/* ================= 极简留资弹窗 (Modal) ================= */
.modal-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px);
  z-index: 1000; display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-content {
  background: #fff; width: 100%; max-width: 440px; border-radius: 16px; padding: 40px;
  position: relative; box-shadow: 0 24px 48px -12px rgba(0,0,0,0.3); animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modalIn { from { transform: scale(0.95) translateY(10px); opacity: 0; } to { transform: scale(1) translateY(0); opacity: 1; } }

.modal-close { position: absolute; top: 20px; right: 20px; cursor: pointer; color: #94a3b8; width: 24px; height: 24px; }
.modal-close:hover { color: var(--brand); }
.modal-content h3 { font-size: 24px; color: var(--text-main); margin-bottom: 8px; font-weight: 700; text-align: center; }
.modal-content p { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; text-align: center; }

.form-group { margin-bottom: 16px; }
.form-group input, .form-group select {
  width: 100%; padding: 14px 16px; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 15px; outline: none; transition: 0.3s;
}
.form-group input:focus, .form-group select:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(208, 43, 43, 0.1); }

.form-submit {
  width: 100%; background: linear-gradient(135deg, #e53935, #d02b2b); color: #fff;
  padding: 14px; border-radius: 8px; font-size: 16px; font-weight: 600; border: none; cursor: pointer;
  margin-top: 8px; box-shadow: 0 8px 20px -6px rgba(208, 43, 43, 0.4); transition: 0.3s;
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 12px 24px -6px rgba(208, 43, 43, 0.5); }

/* ================= 移动端吸底咨询条 ================= */
.mobile-sticky-bar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.06); padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  gap: 12px; border-top: 1px solid var(--border);
}
.mobile-sticky-bar a, .mobile-sticky-bar button {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 8px; border: none; cursor: pointer;
  height: 44px; border-radius: 8px; font-size: 15px; font-weight: 600; text-decoration: none;
}
.mobile-sticky-bar .btn-call { background: #f1f5f9; color: var(--text-main); }
.mobile-sticky-bar .btn-chat { background: var(--brand); color: #fff; box-shadow: 0 4px 12px rgba(208, 43, 43, 0.3); }
.mobile-sticky-bar svg { width: 18px; height: 18px; }

/* ================= 响应式适配 ================= */
@media (max-width: 1200px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 8px 10px; } 
  .header-actions { gap: 12px; }
  .header-phone { font-size: 15px; }
  .btn-header { padding: 10px 16px; font-size: 14px; }
}

/* 显示 PC 悬浮窗 */
@media (min-width: 1300px) {
  .pc-sticky-cta { display: block; }
}

@media (max-width: 1100px) {
  .nav-links, .header-phone { display: none; }
  
  /* 移动端导航面板高级化 */
  .nav-links.mobile-active {
    display: flex; flex-direction: column; position: absolute; top: 70px; left: 16px; right: 16px;
    background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    padding: 12px; border-radius: 16px; box-shadow: 0 24px 48px -12px rgba(0,0,0,0.18), 0 0 0 1px rgba(0,0,0,0.04);
    gap: 4px; z-index: 99;
  }
  
  .nav-links.mobile-active a { 
    position: relative; padding: 16px 20px; border-radius: 12px; font-size: 16px; font-weight: 600; 
    color: var(--text-main); display: flex; align-items: center; transition: all 0.2s ease;
  }
  .nav-links.mobile-active a::before {
    content: ""; width: 6px; height: 6px; background: #cbd5e1;
    border-radius: 50%; margin-right: 14px; transition: all 0.2s; transform: none; opacity: 1;
  }
  .nav-links.mobile-active a::after {
    content: ""; position: absolute; bottom: 0; left: 46px; right: 20px; height: 1px; border-bottom: 1px dashed #e2e8f0;
  }
  .nav-links.mobile-active a:last-child::after { display: none; }
  .nav-links.mobile-active a:hover { background: var(--bg-base); transform: none; }
  .nav-links.mobile-active a:hover::after, .nav-links.mobile-active a.active::after { display: none; }
  .nav-links.mobile-active a.active { background: #fff5f5; color: var(--brand); }
  .nav-links.mobile-active a.active::before { background: var(--brand); box-shadow: 0 0 8px rgba(208, 43, 43, 0.5); }
  
  .mobile-menu-btn { display: block; }
  .mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
  .mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  
  .hero-banner { background-attachment: scroll; }
  .banner-title { font-size: 36px; }
  .banner-summary { font-size: 16px; }
  .banner-meta { flex-direction: column; gap: 8px; align-items: center; }
  
  /* ================= ★ 方案3：悬浮卡片包裹测试区 ★ ================= */
  .facts-bar {
    background: transparent !important;
    border: none !important;
    padding: 16px 20px 40px !important;
    box-shadow: none !important;
  }
  .facts-grid {
    background: #ffffff !important;
    border-radius: 16px !important;
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.08) !important;
    border: 1px solid #eaeaea !important;
    padding: 24px 16px !important;
    gap: 24px 0 !important;
    grid-template-columns: 1fr 1fr !important;
  }
  /* 隐藏原来的左右渐隐线 */
  .fact-item::after { display: none !important; }
  /* 增加上下虚线分割 */
  .fact-item:nth-child(1), .fact-item:nth-child(2) {
    border-bottom: 1px dashed #e2e8f0 !important;
    padding-bottom: 24px !important;
  }
  .fact-item:nth-child(3), .fact-item:nth-child(4) {
    padding-top: 4px !important;
  }
  /* =============================================================== */
  
  .mid-cta-banner { flex-direction: column; text-align: center; gap: 16px; padding: 24px; }
  .mid-cta-banner p { margin-bottom: 8px; }
  
  .mac-window:hover img { transform: scale(1); }
  .mac-window:hover { transform: none; box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
  .img-wrapper { cursor: default; }

  .main-content { margin: 0 auto 40px; padding: 0; max-width: 100%; }
  .article-body { padding: 40px 24px; border-radius: 0; border: none; box-shadow: none; padding-bottom: 100px; }
  
  /* 显示吸底咨询条 */
  .mobile-sticky-bar { display: flex; }
}

@media (max-width: 600px) {
  .site-footer { padding: 60px 0 80px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 16px; margin-bottom: 40px; text-align: left; }
  .footer-col:first-child { grid-column: 1 / -1; }
  .footer-col:nth-child(2) { grid-column: 1 / 2; }
  .footer-col:nth-child(3) { grid-column: 2 / 3; }
  .footer-col:last-child { grid-column: 1 / -1; }
  .footer-col:last-child ul { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .footer-col:last-child ul li { margin-bottom: 0; font-size: 13px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; padding-top: 24px; }
  .footer-bottom .links { flex-direction: row; justify-content: center; flex-wrap: wrap; gap: 6px; }
  .footer-bottom .links .divider { display: inline; } 
  .footer-bottom .copyright { margin: 12px 0; line-height: 1.6; max-width: 90%; }

  .banner-title { font-size: 28px; }
  .article-body h2 { font-size: 24px; margin: 50px 0 24px; }
  .faq-title-wrap { gap: 12px; }
  .faq-text { font-size: 16px; }
  .faq-a { padding-left: 0; margin-top: -10px; }
  .cta-btns { flex-direction: column; }
  .cta-section { padding: 40px 20px; margin-top: 40px; }
  .mac-header { height: 28px; }
  .hot-cases-grid { grid-template-columns: 1fr; }
}


/* 阅读时长闪烁动效 */
.reading-time {
  opacity: 0.8;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0% { opacity: 0.5; }
  50% { opacity: 1; }
  100% { opacity: 0.5; }
}