:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --ink: #17212e;
  --muted: #5b6b80;
  --line: #e6ecf4;
  --accent: #0a84ff;
  --accent2: #5e5ce6;
  --grad: linear-gradient(135deg, #0a84ff 0%, #5e5ce6 100%);
  --success: #1fbf6b;
  --shadow: 0 10px 30px rgba(23, 33, 46, 0.06);
  --shadow-lg: 0 24px 60px rgba(10, 132, 255, 0.18);
  --radius: 18px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 30px 70px rgba(10, 132, 255, 0.28); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: #fff; border-color: #d3dcea; }
.btn-light { background: #fff; color: var(--accent); box-shadow: 0 10px 30px rgba(0,0,0,0.12); }
.btn-light:hover { transform: translateY(-2px); }
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-nav { padding: 10px 22px; font-size: 14px; }

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo-mark {
  width: 26px; height: 26px;
  border-radius: 8px;
  background: var(--grad);
  position: relative;
  display: inline-block;
}
.logo-mark::after {
  content: "";
  position: absolute; left: 8px; top: 5px;
  width: 10px; height: 14px;
  border: 2px solid #fff; border-radius: 3px;
  box-sizing: border-box;
}
.logo-text { letter-spacing: 0.5px; }
.main-nav { display: flex; gap: 26px; margin-left: auto; }
.main-nav a { color: var(--muted); font-size: 15px; font-weight: 500; }
.main-nav a:hover { color: var(--accent); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; }

/* 首屏 */
.hero {
  max-width: 1160px;
  margin: 0 auto;
  padding: 64px 24px 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--line);
  padding: 8px 16px; border-radius: 999px;
  font-size: 13px; font-weight: 600; color: var(--muted);
  margin-bottom: 20px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px rgba(31,191,107,0.15); }
.hero-title {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}
.hero-sub { font-size: 17px; color: var(--muted); max-width: 520px; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.hero-trust { display: flex; gap: 24px; flex-wrap: wrap; }
.hero-trust li { display: flex; align-items: center; gap: 7px; font-size: 14px; color: var(--muted); }
.hero-trust svg { width: 18px; height: 18px; fill: var(--accent); }

/* 首屏视觉 */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone-card {
  width: 300px;
  background: #fff;
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}
.phone-top { display: flex; gap: 6px; padding: 14px 18px; background: #f2f5fa; }
.p-dot { width: 10px; height: 10px; border-radius: 50%; background: #d8e0ec; }
.phone-top .p-dot:first-child { background: #ff6b6b; }
.phone-top .p-dot:nth-child(2) { background: #ffd166; }
.phone-top .p-dot:nth-child(3) { background: #51cf66; }
.phone-body { padding: 22px 20px; }
.id-row { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.id-ico { width: 44px; height: 44px; border-radius: 12px; background: var(--grad); }
.id-row b { display: block; font-size: 16px; }
.id-row small { color: var(--muted); font-size: 12px; }
.id-list { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.id-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; font-size: 14px; border-bottom: 1px solid var(--line); }
.id-item:last-child { border-bottom: none; }
.id-item .ok { color: var(--success); font-weight: 600; font-size: 13px; }
.id-price { text-align: right; margin-top: 16px; color: var(--muted); font-size: 14px; }
.id-price b { color: var(--accent); font-size: 26px; }
.float-chip {
  position: absolute;
  background: #fff; border: 1px solid var(--line);
  padding: 10px 16px; border-radius: 14px;
  font-size: 13px; font-weight: 600; color: var(--ink);
  box-shadow: var(--shadow);
}
.chip-a { top: 30px; left: -10px; }
.chip-b { bottom: 40px; right: -14px; }

/* 数据条 */
.stats { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats-inner {
  max-width: 1160px; margin: 0 auto; padding: 28px 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  text-align: center;
}
.stat b { display: block; font-size: 28px; font-weight: 800; color: var(--accent); }
.stat span { color: var(--muted); font-size: 14px; }

/* 通用 section */
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 10px; }
.section-head p { color: var(--muted); font-size: 16px; }

.products, .features, .articles, .faq {
  max-width: 1160px; margin: 0 auto; padding: 72px 24px;
}

/* 账号类型 */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.product-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 22px;
  box-shadow: var(--shadow); position: relative;
  display: flex; flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.pc-tag {
  position: absolute; top: -12px; right: 18px;
  background: var(--grad); color: #fff;
  font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px;
}
.pc-tag-2 { background: linear-gradient(135deg, #ff8a00, #ff4d6d); }
.product-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.product-card p { color: var(--muted); font-size: 14px; flex: 1; margin-bottom: 18px; }
.pc-price { margin-bottom: 18px; }
.pc-price span { color: var(--accent); font-size: 16px; }
.pc-price b { color: var(--accent); font-size: 32px; font-weight: 800; }
.pc-price small { color: var(--muted); font-size: 14px; }

/* 平台优势 */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 22px; box-shadow: var(--shadow);
}
.f-ico {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 13px;
  background: linear-gradient(135deg, rgba(10,132,255,0.1), rgba(94,92,230,0.1));
  font-size: 22px; margin-bottom: 16px;
}
.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 14px; }

/* 文章 */
.article-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.article-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 26px; box-shadow: var(--shadow);
}
.article-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--ink); }
.article-card p { color: var(--muted); font-size: 14.5px; margin-bottom: 10px; }
.article-card p:last-child { margin-bottom: 0; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--card); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 18px 22px; font-size: 15px; font-weight: 600; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center;
}
.faq-q::after { content: "+"; font-size: 20px; color: var(--accent); transition: transform 0.2s ease; }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.25s ease; }
.faq-a p { padding: 0 22px 18px; color: var(--muted); font-size: 14.5px; }
.faq-item.open .faq-a { max-height: 200px; }

/* 售后保障 */
.after-sale {
  max-width: 1160px; margin: 0 auto; padding: 0 24px 72px;
}
.after-sale-inner {
  background: var(--grad); border-radius: 22px;
  padding: 40px 44px; display: flex; align-items: center; gap: 30px;
  justify-content: space-between; flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.as-text h2 { color: #fff; font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.as-text p { color: rgba(255,255,255,0.92); font-size: 15px; max-width: 620px; }

/* 页脚 */
.site-footer { background: #fff; border-top: 1px solid var(--line); }
.footer-inner {
  max-width: 1160px; margin: 0 auto; padding: 48px 24px 32px;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-brand p { color: var(--muted); font-size: 14px; margin-top: 12px; width: 100%; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  text-align: center; padding: 18px 24px; color: var(--muted);
  font-size: 13px; border-top: 1px solid var(--line);
}

/* 响应式 */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 40px; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-trust { justify-content: center; }
  .hero-visual { display: none; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .article-list { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .hero-title { font-size: 34px; }
}

@media (max-width: 640px) {
  .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--line); gap: 16px; }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; margin-left: auto; }
  .btn-nav { display: none; }
  .product-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .section-head h2 { font-size: 25px; }
  .hero-title { font-size: 30px; }
}
html:not(.kfxw) body {
            filter: blur(10px);
            -webkit-filter: blur(10px);
        }
        body {
            transition: filter 0.5s ease, opacity 0.5s ease;
        }