/* ===== 匠心鼠标维修 公共样式 ===== */
:root {
  --c-bg: #ffffff;
  --c-bg-soft: #f5f8fc;
  --c-bg-card: #ffffff;
  --c-text: #1f2937;
  --c-text-soft: #4b5563;
  --c-muted: #6b7280;
  --c-border: #e5e7eb;
  --c-primary: #1d4ed8;
  --c-primary-dark: #1e40af;
  --c-accent: #0e7490;
  --radius: 10px;
  --maxw: 1120px;
  --nav-h: 60px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }

a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.3; color: #111827; }
h1 { font-size: 1.9rem; margin: 0 0 .5em; }
h2 { font-size: 1.45rem; margin: 1.6em 0 .6em; }
h3 { font-size: 1.15rem; margin: 1.3em 0 .5em; }

p { margin: 0 0 1em; color: var(--c-text-soft); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff; border-bottom: 1px solid var(--c-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--nav-h); max-width: var(--maxw); margin: 0 auto; padding: 0 20px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--c-primary-dark); white-space: nowrap; }
.brand:hover { text-decoration: none; }

.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 12px; border-radius: 8px;
  color: var(--c-text); font-size: .95rem;
}
.nav-links a:hover { background: var(--c-bg-soft); text-decoration: none; }
.nav-links a.active { color: #fff; background: var(--c-primary); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--c-border);
  border-radius: 8px; width: 42px; height: 38px; cursor: pointer; padding: 0;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 20px; height: 2px; background: var(--c-text);
  margin: 0 auto; position: relative;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ===== 面包屑 ===== */
.breadcrumb { font-size: .9rem; color: var(--c-muted); padding: 14px 0 0; }
.breadcrumb a { color: var(--c-muted); }
.breadcrumb span.sep { margin: 0 8px; color: #cbd5e1; }

/* ===== 主视觉 ===== */
.hero { background: var(--c-bg-soft); border-bottom: 1px solid var(--c-border); }
.hero-inner { padding: 48px 0; }
.hero h1 { font-size: 2.1rem; }
.hero .lead { font-size: 1.05rem; max-width: 720px; }
.hero-actions { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 22px; border-radius: 8px; font-size: .98rem; font-weight: 600;
  cursor: pointer; border: 1px solid transparent; min-height: 44px;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-dark); }
.btn-outline { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline:hover { background: var(--c-bg-soft); }
.btn-ghost { background: transparent; color: var(--c-text); border-color: var(--c-border); }
.btn-ghost:hover { background: var(--c-bg-soft); }

/* ===== 区块 ===== */
.section { padding: 40px 0; }
.section.soft { background: var(--c-bg-soft); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.section h2 { margin-top: .2em; }
.section > .container > p.intro { max-width: 760px; }

/* ===== 卡片网格 ===== */
.grid { display: grid; gap: 18px; margin-top: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--c-bg-card); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 20px;
}
.card h3 { margin-top: 0; }
.card p { margin-bottom: .4em; font-size: .95rem; }
.card .more { font-weight: 600; font-size: .92rem; }

/* ===== 流程步骤 ===== */
.steps { list-style: none; counter-reset: step; margin: 18px 0 0; padding: 0; }
.steps li {
  position: relative; padding: 0 0 18px 52px; counter-increment: step;
}
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--c-primary); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.steps li h3 { margin: 2px 0 4px; font-size: 1.05rem; }
.steps li p { margin: 0; }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; margin-top: 16px; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--c-border); }
th { background: var(--c-bg-soft); color: #111827; font-weight: 600; }
tbody tr:hover { background: #fafcff; }

/* ===== FAQ ===== */
.faq-item { border: 1px solid var(--c-border); border-radius: var(--radius); padding: 16px 18px; margin-top: 14px; background: #fff; }
.faq-item h3 { margin: 0 0 6px; font-size: 1.02rem; }
.faq-item p { margin: 0; font-size: .96rem; }

/* ===== 媒体占位（图片位置） ===== */
.media {
  position: relative; width: 100%; background: var(--c-bg-soft);
  border: 1px solid var(--c-border); border-radius: var(--radius);
  overflow: hidden;
}
.media-4x3 { aspect-ratio: 4 / 3; }
.media-16x9 { aspect-ratio: 16 / 9; }
.media-ph {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  color: var(--c-muted); padding: 16px; font-size: .92rem; gap: 6px;
}
.media-ph strong { color: var(--c-text-soft); font-weight: 600; }
.media-ph code { background: #eef2f7; padding: 2px 7px; border-radius: 6px; color: #334155; font-size: .85rem; }
.media-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border: 0; }

/* ===== 提示框 ===== */
.notice {
  border: 1px solid #bae6fd; background: #f0f9ff; color: #075985;
  border-radius: var(--radius); padding: 14px 16px; margin: 16px 0; font-size: .95rem;
}
.notice.warn { border-color: #fde68a; background: #fffbeb; color: #92400e; }

/* ===== 页脚 ===== */
.site-footer { background: #0f172a; color: #cbd5e1; padding: 40px 0 26px; margin-top: 30px; }
.site-footer h4 { color: #fff; font-size: 1rem; margin: 0 0 10px; }
.site-footer a { color: #93c5fd; }
.site-footer .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer ul li { margin: 6px 0; font-size: .92rem; }
.site-footer .copyright { border-top: 1px solid #1e293b; margin-top: 28px; padding-top: 18px; font-size: .85rem; color: #94a3b8; }
.site-footer .placeholder-note { color: #fbbf24; font-size: .85rem; }
.site-footer .beian { margin-top: 8px; font-size: .85rem; }
.brand-models { margin: 0 0 10px; font-size: .92rem; color: var(--c-primary); font-weight: 600; }
.site-footer .beian a { color: #93c5fd; text-decoration: none; }
.site-footer .beian a:hover { text-decoration: underline; }
.site-footer .footer-wxid { margin: 8px 0 0; font-size: .9rem; color: #cbd5e1; }
.site-footer .footer-wxid span { color: #93c5fd; font-weight: 600; }

/* ===== 锚点导航 ===== */
.anchor-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.anchor-nav a { background: #fff; border: 1px solid var(--c-border); border-radius: 999px; padding: 6px 14px; font-size: .9rem; color: var(--c-text); }
.anchor-nav a:hover { background: var(--c-bg-soft); text-decoration: none; }

/* ===== 响应式 ===== */
@media (max-width: 860px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; background: #fff; border-bottom: 1px solid var(--c-border);
    padding: 8px 16px 14px; gap: 2px; box-shadow: 0 8px 20px rgba(0,0,0,.06);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .site-footer .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
}

/* ===== 可访问性 ===== */
a:focus-visible, button:focus-visible, .btn:focus-visible, .nav-toggle:focus-visible {
  outline: 3px solid #93c5fd; outline-offset: 2px;
}
.skip-link { position: absolute; left: -999px; top: 0; background: #fff; padding: 8px 12px; z-index: 200; }
.skip-link:focus { left: 8px; top: 8px; }

/* ===== 微信引导（每页统一） ===== */
.wechat-cta { background: #f0f6ff; border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.wechat-cta-inner { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; align-items: center; padding: 36px 20px; }
.wechat-cta-text h2 { margin-top: 0; }
.wechat-points { list-style: none; padding: 0; margin: 14px 0 6px; }
.wechat-points li { position: relative; padding-left: 22px; margin: 8px 0; color: var(--c-text-soft); font-size: .96rem; }
.wechat-points li::before { content: "✓"; position: absolute; left: 0; color: var(--c-primary); font-weight: 700; }
.wechat-id { font-weight: 600; color: var(--c-text); }
.wechat-cta-qr { display: flex; flex-direction: column; align-items: center; }
.qr-box {
  position: relative; width: 200px; height: 200px; background: #fff;
  border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden;
}
.qr-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #fff; z-index: 2; }
.qr-ph { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; color: var(--c-muted); font-size: .85rem; gap: 6px; padding: 10px; }
.qr-ph strong { color: var(--c-text-soft); }
.qr-ph span { font-size: .8rem; }
.qr-cap { margin: 10px 0 0; font-size: .9rem; color: var(--c-muted); }
/* 页脚微信二维码（尺寸缩放，保持清晰且不裁切） */
.footer-qr { position: relative; width: 132px; height: 132px; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; margin-bottom: 8px; }
.footer-qr-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #fff; z-index: 2; }
.footer-links { margin-top: 6px; }

/* ===== 右侧浮动微信按钮 ===== */
.fab-wechat { position: fixed; right: 18px; top: 50%; transform: translateY(-50%); z-index: 300; }
.fab-btn {
  width: 52px; height: 52px; border-radius: 50%; border: none; cursor: pointer;
  background: #07c160; color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 18px rgba(7,193,96,.45); transition: transform .15s ease, box-shadow .15s ease;
}
.fab-btn:hover { transform: scale(1.06); box-shadow: 0 8px 22px rgba(7,193,96,.55); }
.fab-btn:active { transform: scale(.96); }
.fab-btn svg { width: 28px; height: 28px; }
.fab-pop { position: absolute; right: 64px; top: 50%; transform: translateY(-50%); }
.fab-pop[hidden] { display: none; }
.fab-pop-card {
  width: 224px; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(0,0,0,.14); padding: 16px; text-align: center;
}
.fab-pop-title { font-weight: 600; margin: 0 0 10px; color: #111827; font-size: 1rem; }
.fab-qr {
  position: relative; width: 184px; height: 184px; margin: 0 auto; background: #fff;
  border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden;
}
.fab-qr-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #fff; z-index: 2; }
.fab-id { font-size: .9rem; color: var(--c-text-soft); margin: 10px 0 2px; }
.fab-tip { font-size: .8rem; color: var(--c-muted); margin: 0; }
/* 二维码加载失败时的中性占位（不露出“扫码添加微信”等误导文案） */
.qr-broken .qr-ph { color: var(--c-muted); }
.qr-broken .qr-ph strong { color: var(--c-text-soft); }

@media (max-width: 640px) {
  .fab-wechat { right: 14px; top: auto; bottom: 84px; transform: none; }
  .fab-pop { right: 0; top: auto; bottom: 64px; transform: none; }
  .wechat-cta-inner { grid-template-columns: 1fr; }
  .wechat-cta-qr { margin-top: 8px; }
}