/* ==========================================================================
   倍速网络官网 · 全站样式
   视觉语言：白 / 浅蓝灰 / 深蓝墨 + 品牌蓝 #1657F5 承担所有交互态
   深色区（页头 / CTA / 页脚）用深蓝黑而不是纯黑，避免整站压抑
   约束：无框架、无外部字体、移动端优先、375px 无横向滚动
   ========================================================================== */

:root {
  --ink: #182338;
  --text: #333b4b;
  --muted: #6f7889;
  --muted-2: #8e98aa;
  --line: #e5ebf4;
  --line-2: #d2dcec;
  --soft: #f6f9fe;
  --paper: #ffffff;
  --canvas: #ffffff;
  --dark: #0b1220;
  --accent: #1657f5;
  --accent-600: #0b3db8;
  --accent-soft: #eaf1ff;
  /* 兼容旧类名：--blue 系列与品牌蓝保持一致 */
  --blue: #1657f5;
  --blue-600: #0b3db8;
  --blue-50: #eaf1ff;
  /* 强调红仅定义不使用，留给极少数需要警示的语义 */
  --red: #ef1f1f;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 6px rgba(16, 20, 27, .04), 0 12px 28px -18px rgba(16, 20, 27, .28);
  --shadow-md: 0 4px 10px rgba(16, 20, 27, .04), 0 30px 60px -34px rgba(16, 20, 27, .34);
  --wrap: 1200px;
  --hd: 76px;
  /* LOGO 显示高度（原图 509×100，宽高比 5.09:1）；窄屏自动降一档 */
  --logo-h: 28px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  padding-top: var(--hd);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
}
body.is-home { padding-top: 0; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }
ul, ol { margin: 0; }
h1, h2, h3, h4 {
  margin: 0; color: var(--ink); letter-spacing: -.02em; line-height: 1.25;
  font-weight: 600; text-wrap: balance;
}
p { margin: 0; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 26px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--dark); color: #fff; padding: 10px 18px; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; color: #fff; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section--soft { background: var(--soft); border-block: 1px solid var(--line); }
.section--tight { padding: 68px 0; }

.sec-head { max-width: 760px; margin-bottom: 46px; }
.sec-head h2 { font-size: clamp(2.2rem, 1.3rem + 2.6vw, 3.1rem); letter-spacing: -.03em; }
.sec-head p { margin-top: 16px; color: var(--muted); font-size: 16px; line-height: 1.85; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 16px;
}
.eyebrow::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); flex: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 500; line-height: 1.2;
  transition: background-color .25s ease, color .25s ease, border-color .25s ease;
  cursor: pointer;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #000; color: #fff; }
.btn-ghost { background: transparent; border-color: var(--line-2); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { background: var(--accent); color: #fff; }
.btn-block { width: 100%; }

/* ---------- 头部 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  height: var(--hd);
  background: var(--dark);
  color: #fff;
  transition: background-color .45s ease, color .45s ease, box-shadow .45s ease;
}
.site-header.is-solid {
  background: rgba(255, 255, 255, .94);
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(0, 0, 0, .07);
  -webkit-backdrop-filter: saturate(1.8) blur(14px);
  backdrop-filter: saturate(1.8) blur(14px);
}
.hd-inner {
  position: relative;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; height: 100%;
  max-width: 1560px; margin-inline: auto; padding-inline: clamp(20px, 4vw, 56px);
}

.brand { position: relative; display: inline-flex; align-items: center; color: inherit; flex: none; }
.brand:hover { color: inherit; }
/* 两版 LOGO 叠放交叉淡入：深色页头用白字版，.is-solid 后切深字版 */
.brand-logo {
  display: block; height: var(--logo-h); width: auto;
  transition: opacity .45s ease;
}
.brand-logo--onLight {
  position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  opacity: 0;
}
.site-header.is-solid .brand-logo--onDark { opacity: 0; }
.site-header.is-solid .brand-logo--onLight { opacity: 1; }

.nav {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  display: flex; align-items: center; gap: clamp(6px, 1.6vw, 28px);
}
.nav a {
  position: relative;
  padding: 8px 0;
  font-size: 15px; color: inherit; white-space: nowrap;
  opacity: .78;
  transition: opacity .2s ease, color .2s ease;
}
.nav a:hover { opacity: 1; color: inherit; }
.nav a.is-active { opacity: 1; font-weight: 500; }
.nav a.is-active::after {
  content: ""; position: absolute; left: 50%; bottom: -2px;
  width: 4px; height: 4px; margin-left: -2px; border-radius: 50%;
  background: var(--accent);
}

.hd-actions { display: flex; align-items: center; gap: 18px; flex: none; }
.hd-tel {
  font-size: 15px; color: inherit; opacity: .78;
  font-variant-numeric: tabular-nums; letter-spacing: .01em;
}
.hd-tel:hover { color: inherit; opacity: 1; }
.hd-cta {
  display: inline-flex; align-items: center;
  padding: 9px 20px; border-radius: 999px;
  border: 1px solid currentColor;
  font-size: 14px; color: inherit;
  transition: background-color .3s ease, color .3s ease, border-color .3s ease;
}
.site-header:not(.is-solid) .hd-cta { border-color: rgba(255, 255, 255, .5); }
.hd-cta:hover { background: #fff; color: var(--dark); border-color: #fff; }
.site-header.is-solid .hd-cta { border-color: var(--line-2); }
.site-header.is-solid .hd-cta:hover { background: var(--ink); color: #fff; border-color: var(--ink); }

.nav-toggle {
  display: none; width: 38px; height: 38px; border: 1px solid rgba(255, 255, 255, .4);
  border-radius: 8px; background: transparent; padding: 0; cursor: pointer;
  align-items: center; justify-content: center;
}
.site-header.is-solid .nav-toggle { border-color: var(--line-2); }
.nav-toggle span { display: block; width: 17px; height: 1.5px; background: currentColor; position: relative; color: #fff; }
.site-header.is-solid .nav-toggle span { color: var(--ink); }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 17px; height: 1.5px; background: currentColor;
}
.nav-toggle span::before { top: -5.5px; }
.nav-toggle span::after { top: 5.5px; }

/* ---------- 内页头 ---------- */
.page-hero { position: relative; overflow: hidden; background: #ededed; }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(110% 80% at 82% 0%, #fafafa 0%, rgba(250, 250, 250, 0) 58%),
    linear-gradient(180deg, #f1f1f1 0%, #e4e4e4 100%);
}
.page-hero-inner {
  position: relative; z-index: 1;
  max-width: 1560px; margin-inline: auto;
  padding: clamp(26px, 2.8vw, 42px) clamp(20px, 4vw, 56px) clamp(44px, 5vw, 72px);
  display: grid; grid-template-columns: 1.04fr .96fr;
  gap: clamp(32px, 4vw, 64px); align-items: center;
  min-height: clamp(480px, 58vh, 600px);
}
.page-hero-copy { min-width: 0; }
.page-hero-media {
  margin: 0; aspect-ratio: 1.14;
  border-radius: 20px; overflow: hidden;
  background: #dcdcdc;
  box-shadow: 0 40px 80px -50px rgba(0, 0, 0, .55), 0 0 0 1px rgba(0, 0, 0, .05);
}
.page-hero-media img { width: 100%; height: 100%; object-fit: cover; }
.page-hero h1 {
  font-size: clamp(2rem, 1.1rem + 2.6vw, 3.35rem);
  font-weight: 500; letter-spacing: -.045em; line-height: 1.18;
}
.lede {
  margin-top: 20px;
  font-size: clamp(15px, .9rem + .25vw, 17.5px);
  line-height: 1.85; color: #5d5d62; max-width: 34em;
}

/* ---------- 正文排版 ---------- */
.prose { max-width: 780px; }
.prose h2 { font-size: 1.55rem; margin: 44px 0 16px; letter-spacing: -.03em; }
.prose h3 { font-size: 1.15rem; margin: 30px 0 10px; }
.prose p { margin-bottom: 16px; font-size: 16px; line-height: 1.95; color: #454548; }
.prose ul, .prose ol { padding-left: 22px; margin-bottom: 18px; color: #454548; line-height: 1.95; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); }
.prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-2); }
.prose a:hover { text-decoration-color: var(--accent); }

/* ---------- 数据卡片 / 价格 ---------- */
.price-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 28px 0 8px; }
.pcard { background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.pcard .k { font-size: 12px; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.pcard .v { font-size: 20px; font-weight: 600; color: var(--ink); margin-top: 10px; letter-spacing: -.02em; }
.pcard .s { font-size: 13px; color: var(--muted); margin-top: 8px; line-height: 1.65; }

.note {
  border-left: 2px solid var(--accent); background: var(--accent-soft);
  border-radius: 0 12px 12px 0; padding: 18px 22px;
  font-size: 15px; color: #3a2a22; line-height: 1.85;
}
.note b { color: var(--accent-600); }

/* ---------- 对比表 ---------- */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.cmp { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 520px; }
.cmp th, .cmp td { padding: 15px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.cmp thead th { background: var(--soft); font-size: 13px; font-weight: 600; color: var(--muted); white-space: nowrap; }
.cmp tbody th { font-weight: 600; color: var(--ink); width: 26%; }
.cmp .yes { color: var(--ink); font-weight: 600; }
.cmp .no { color: var(--muted-2); }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.step .n { font-size: 11.5px; font-weight: 700; letter-spacing: .14em; color: var(--accent); }
.step h3 { font-size: 16px; margin: 10px 0 8px; }
.step p { font-size: 14px; color: var(--muted); line-height: 1.8; margin: 0; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: start; }
.info-block { margin-bottom: 28px; }
.info-block h3 { font-size: 12.5px; letter-spacing: .1em; color: var(--muted); font-weight: 600; margin-bottom: 10px; text-transform: uppercase; }
.info-block p, .info-block a { font-size: 16px; color: var(--ink); line-height: 1.8; }
.info-block a:hover { color: var(--accent); }
.info-block .sub { font-size: 14px; color: var(--muted); }
.info-block .qr-img {
  display: block; width: 160px; height: 160px; margin: 6px 0 10px;
  border: 1px solid var(--line); border-radius: 10px; padding: 6px; background: #fff;
}

.form-card { background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 34px; }
.form-card h2 { font-size: 1.3rem; margin-bottom: 8px; }
.form-card .hint { font-size: 14px; color: var(--muted); margin-bottom: 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 8px; }
.field label .req { color: var(--accent); }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 14px;
  border: 1px solid var(--line-2); border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--ink);
  background: #fff; transition: border-color .18s ease, box-shadow .18s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(29, 29, 31, .07);
}
.field textarea { min-height: 122px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 14px; line-height: 1.7; }
.form-msg { margin-top: 14px; font-size: 14px; display: none; }
.form-msg.ok { display: block; color: #1a7f4b; }
.form-msg.err { display: block; color: var(--accent); }

/* ---------- 页脚（紧凑版：大字 + 电话 + 服务标签 / 三列链接 + 地址） ---------- */
.site-footer {
  background: #0a0a0c;
  color: #fff;
  padding: clamp(26px, 2.8vw, 36px) 0 0;
  margin-top: 0;
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, .09);
}
.ft-wrap { max-width: 1560px; margin-inline: auto; padding-inline: clamp(20px, 4vw, 56px); }

.ft-main {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.34fr) minmax(0, .52fr);
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
  padding-bottom: clamp(18px, 2vw, 24px);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.ft-title {
  font-size: clamp(1.45rem, .95rem + 1.7vw, 2.2rem);
  line-height: 1.2; font-weight: 500; letter-spacing: -.04em;
  color: #fff;
}
.ft-tel-label {
  margin-top: clamp(12px, 1.4vw, 18px);
  font-size: 11.5px; letter-spacing: .12em; color: rgba(255, 255, 255, .42);
}
.ft-tel {
  display: inline-block; margin-top: 5px;
  font-size: clamp(1.1rem, .9rem + .65vw, 1.5rem); font-weight: 500;
  letter-spacing: -.02em; color: #fff; font-variant-numeric: tabular-nums;
}
.ft-tel:hover { color: var(--accent); }
.ft-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  list-style: none; margin: clamp(12px, 1.4vw, 18px) 0 0; padding: 0;
}
.ft-tags a {
  display: inline-block; padding: 5px 12px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .18);
  font-size: 12.5px; line-height: 1.5; color: rgba(255, 255, 255, .78);
  transition: border-color .25s ease, color .25s ease;
}
.ft-tags a:hover { border-color: rgba(255, 255, 255, .5); color: #fff; }

.ft-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.ft-cols h4 {
  color: rgba(255, 255, 255, .42);
  font-size: 11.5px; letter-spacing: .12em; font-weight: 500;
  margin-bottom: 12px; text-transform: uppercase;
}
.ft-cols ul { list-style: none; padding: 0; margin: 0; }
.ft-cols li { margin-bottom: 8px; }
.ft-cols li:last-child { margin-bottom: 0; }
.ft-cols li a, .ft-cols li span { font-size: 13.5px; line-height: 1.55; color: rgba(255, 255, 255, .76); }
.ft-cols li a:hover { color: #fff; }
.ft-addr p { font-size: 13.5px; line-height: 1.75; color: rgba(255, 255, 255, .62); }
.ft-addr p + p { margin-top: 6px; }
.ft-addr a { color: rgba(255, 255, 255, .62); }
.ft-addr a:hover { color: #fff; }

.ft-bottom {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  padding: 13px 0 15px;
  font-size: 12px; color: rgba(255, 255, 255, .4);
}
.ft-bottom a { color: rgba(255, 255, 255, .4); }
.ft-bottom a:hover { color: #fff; }
.ft-bottom .sep { margin: 0 8px; opacity: .4; }

/* ---------- FAQ ---------- */
.faq { max-width: 900px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  position: relative; cursor: pointer; list-style: none;
  padding: 22px 44px 22px 0;
  font-size: 16.5px; font-weight: 500; color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 6px; top: 50%;
  transform: translateY(-50%);
  font-size: 20px; font-weight: 300; color: var(--muted); line-height: 1;
  transition: transform .2s ease, color .2s ease;
}
.faq details[open] summary::after { content: "–"; color: var(--accent); }
.faq details p { padding: 0 0 24px; font-size: 15px; color: #5a5a5f; line-height: 1.95; max-width: 74ch; }
.faq-layout { display: grid; grid-template-columns: 320px 1fr; gap: 64px; align-items: start; }
.sec-head--faq { margin-bottom: 0; position: sticky; top: calc(var(--hd) + 32px); }

/* ---------- CTA 条 ---------- */
.cta-band { background: var(--dark); color: #fff; padding: clamp(54px, 7vw, 96px) 0; }
.cta-band .inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 40px; flex-wrap: wrap;
}
.cta-band h2 {
  color: #fff; font-size: clamp(2.2rem, 1.3rem + 2.6vw, 3.1rem);
  font-weight: 500; letter-spacing: -.045em; line-height: 1.2;
}
.cta-band p { color: rgba(255, 255, 255, .58); margin-top: 16px; font-size: 15px; line-height: 1.8; }
.cta-band .actions { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 30px); flex-wrap: wrap; }
.cta-band .tel {
  font-size: clamp(1.2rem, 1rem + .8vw, 1.75rem);
  font-weight: 500; color: #fff; letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.cta-band .tel:hover { color: var(--accent); }
.cta-band .btn-white { padding: 14px 32px; }

/* ---------- 栅格列数 ---------- */
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }

.qa-grid > *, .price-row > *, .steps > *, .contact-grid > *, .footer-grid > * { min-width: 0; }

/* ---------- 问答卡（内页复用） ---------- */
.qa-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.qa {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px;
  transition: border-color .25s ease, background-color .25s ease;
}
.qa:hover { border-color: var(--line-2); background: var(--soft); }
.qa-num {
  display: inline-block; font-size: 11.5px; font-weight: 600; letter-spacing: .12em;
  color: var(--accent); background: var(--accent-soft);
  padding: 3px 9px; border-radius: 5px;
}
.qa h3 { font-size: 17.5px; margin: 16px 0 12px; line-height: 1.5; }
.qa p { font-size: 15px; color: #5a5a5f; line-height: 1.9; }

/* ---------- 响应式 ---------- */
/* 导航 8 项后，900—1200 区间会压到品牌与电话区：提前到 1180px 收成汉堡菜单 */
@media (max-width: 1180px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; left: 0; right: 0; top: var(--hd);
    transform: none;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--dark);
    padding: 8px 20px 26px;
    border-top: 1px solid rgba(255, 255, 255, .1);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 14px 2px; font-size: 16px; border-bottom: 1px solid rgba(255, 255, 255, .08); opacity: .9; }
  .nav a.is-active::after { display: none; }
}

@media (max-width: 1080px) {
  .page-hero-inner { grid-template-columns: 1fr; gap: 30px; min-height: 0; padding-bottom: 46px; }
  .page-hero-media { max-width: none; aspect-ratio: 16 / 10; }
  .faq-layout { grid-template-columns: 1fr; gap: 30px; }
  .sec-head--faq { position: static; }
  .cols-4, .cols-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  /* 页脚：地址块挪到品牌下方，三列链接占右半边，整体不至于拉太高 */
  .ft-main {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.45fr);
    grid-template-areas: "brand cols" "addr cols";
    row-gap: 16px;
  }
  .ft-brand { grid-area: brand; }
  .ft-cols { grid-area: cols; }
  .ft-addr { grid-area: addr; }
}

@media (max-width: 900px) {
  :root { --hd: 64px; --logo-h: 24px; }
  .hd-cta { display: none; }
  .hd-tel { font-size: 14px; }
  .section { padding: 68px 0; }
  .qa-grid, .price-row, .steps,
  .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .cta-band { padding: 48px 0; }
  .cta-band .inner { flex-direction: column; align-items: flex-start; }
  .ft-cols { grid-template-columns: 1fr 1fr; gap: 18px 22px; }
  .form-card { padding: 26px; }
}

@media (max-width: 860px) {
  .ft-main {
    grid-template-columns: 1fr;
    grid-template-areas: "brand" "addr" "cols";
    row-gap: 18px;
  }
}

@media (max-width: 560px) {
  :root { --logo-h: 22px; }
  .wrap { padding-inline: 18px; }
  .ft-wrap { padding-inline: 18px; }
  .btn { padding: 12px 20px; font-size: 14.5px; }
  .ft-bottom { flex-direction: column; }
  .ft-cols { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
}

/* ---------- 首屏细网格：给内页头一点结构感 ---------- */
.page-hero::after {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(29, 29, 31, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 29, 31, .06) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(120% 96% at 92% 2%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 96% at 92% 2%, #000 0%, transparent 68%);
}

/* ---------- 滚动入场：支持滚动时间轴的浏览器才有动画，其余静态 ---------- */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .rv {
      animation: rv-in .85s cubic-bezier(.2, .6, .2, 1) both;
      animation-timeline: view();
      animation-range: entry 6% cover 26%;
    }
    /* 用 translate 而不是 transform，避免覆盖卡片自身的 hover 位移 */
    @keyframes rv-in {
      from { opacity: 0; translate: 0 22px; }
      to { opacity: 1; translate: 0 0; }
    }
  }
}

/* ---------- 单页正文区：后台「单页内容」里的富文本 ---------- */
.page-body .wrap { max-width: 1240px; }
.page-prose { max-width: 860px; }
.page-prose h2 {
  font-size: clamp(1.32rem, 1.08rem + .7vw, 1.72rem);
  margin: 40px 0 14px; letter-spacing: -.03em; line-height: 1.35;
  padding-left: 16px; border-left: 2px solid var(--accent);
}
.page-prose h2:first-child { margin-top: 0; }
.page-prose h3 { font-size: 1.12rem; margin: 28px 0 10px; letter-spacing: -.01em; }
.page-prose p { font-size: 16px; line-height: 1.95; color: #454548; margin-bottom: 15px; }
.page-prose ul, .page-prose ol { padding-left: 22px; margin-bottom: 18px; color: #454548; line-height: 1.95; }
.page-prose li { margin-bottom: 7px; }
.page-prose blockquote {
  margin: 20px 0; padding: 4px 0 4px 18px;
  border-left: 2px solid var(--accent); color: var(--muted); font-size: 15px; line-height: 1.9;
}
.page-prose img { max-width: 100%; height: auto; border-radius: 12px; margin: 6px 0 18px; }
.page-prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.page-prose strong { color: var(--ink); font-weight: 600; }
.page-prose > :last-child { margin-bottom: 0; }

/* ---------- 公司速览（AI 可读事实表） ---------- */
.fact-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(24px, 4vw, 64px); margin-top: 26px;
}
.fact-grid > div {
  display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 14px;
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.fact-grid dt { font-size: 13px; color: var(--muted); line-height: 1.7; }
.fact-grid dd { margin: 0; font-size: 14.5px; color: var(--ink); line-height: 1.7; }
.fact-grid dd a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 900px) {
  .fact-grid { grid-template-columns: 1fr; }
  .fact-grid > div { grid-template-columns: 92px minmax(0, 1fr); gap: 10px; }
}

/* ---------- 右侧悬浮工具条 ---------- */
.side-tools {
  position: fixed; right: clamp(10px, 1.6vw, 26px); bottom: 16%;
  z-index: 85;
  display: flex; flex-direction: column; gap: 10px;
}
.st-btn {
  position: relative; display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; padding: 0;
  border: 1px solid rgba(0, 0, 0, .07); border-radius: 50%;
  background: #fff; color: #2a2a2e; cursor: pointer;
  box-shadow: 0 6px 22px rgba(0, 0, 0, .1);
  transition: background-color .25s ease, color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.st-btn svg {
  width: 19px; height: 19px; fill: none; stroke: currentColor;
  stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
}
.st-btn:hover, .st-btn:focus-visible {
  background: var(--dark); color: #fff; transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, .18); outline: none;
}
.st-tip {
  position: absolute; right: calc(100% + 10px); top: 50%;
  transform: translate(6px, -50%); white-space: nowrap;
  padding: 7px 12px; border-radius: 7px;
  background: var(--dark); color: #fff; font-size: 12.5px; line-height: 1.2;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, visibility .22s ease;
}
.st-tip::after {
  content: ""; position: absolute; right: -4px; top: 50%; margin-top: -4px;
  width: 8px; height: 8px; background: var(--dark); transform: rotate(45deg);
}
.st-btn:hover .st-tip, .st-btn:focus-visible .st-tip {
  opacity: 1; visibility: visible; transform: translate(0, -50%);
}
.st-qr {
  position: absolute; right: calc(100% + 12px); bottom: 0;
  width: 206px; padding: 12px 12px 10px;
  background: #fff; border: 1px solid rgba(0, 0, 0, .08); border-radius: 12px;
  box-shadow: 0 16px 44px rgba(0, 0, 0, .16);
  text-align: center;
  opacity: 0; visibility: hidden; transform: translateX(8px); pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, visibility .22s ease;
}
.st-qr img { display: block; width: 180px; height: 180px; object-fit: contain; border-radius: 6px; }
.st-qr p { margin: 8px 0 0; font-size: 12px; line-height: 1.5; color: #66686e; }
.st-wechat:hover ~ .st-qr,
.st-qr:hover,
.st-qr.is-open,
.st-wechat:focus-visible ~ .st-qr {
  opacity: 1; visibility: visible; transform: translateX(0); pointer-events: auto;
}

/* ---------- 手机端底部固定条 ---------- */
.m-cta { display: none; }

/* ---------- 手机端：页脚简化 + 悬浮条避让 + 菜单可读性 ---------- */
@media (max-width: 1180px) {
  /* 下拉菜单本身是深底，文字必须显式给白，避免页头滚成白底后「黑底深字」 */
  .nav a, .nav a:hover, .nav a.is-active { color: #fff; }
  .site-header.is-nav-open {
    background: var(--dark); color: #fff; box-shadow: none;
  }
  .site-header.is-nav-open .brand-logo--onDark { opacity: 1; }
  .site-header.is-nav-open .brand-logo--onLight { opacity: 0; }
  .site-header.is-nav-open .nav-toggle { border-color: rgba(255, 255, 255, .4); }
  .site-header.is-nav-open .nav-toggle span { color: #fff; }
  .site-header.is-nav-open .hd-tel { color: #fff; }
}

@media (max-width: 900px) {
  /* 页脚只留标语、加粗电话、地址与版权，隐藏标签与三列链接 */
  .site-footer { padding-bottom: 76px; }
  .ft-tags, .ft-cols { display: none; }
  .ft-main { grid-template-columns: 1fr; grid-template-areas: "brand" "addr"; padding-bottom: 20px; }
  .ft-tel-label { margin-top: 18px; font-size: 12px; }
  .ft-tel { font-size: 1.6rem; font-weight: 700; letter-spacing: -.03em; }
  .ft-addr p { font-size: 13px; }
  .ft-bottom { font-size: 11.5px; }

  /* 悬浮条缩小并抬到底部按钮之上 */
  .side-tools { right: 10px; bottom: calc(64px + 16px); gap: 8px; }
  .st-btn { width: 38px; height: 38px; box-shadow: 0 4px 16px rgba(0, 0, 0, .12); }
  .st-btn svg { width: 17px; height: 17px; }
  .st-tip { display: none; }
  .st-qr { right: calc(100% + 10px); bottom: -42px; width: 174px; padding: 10px; }
  .st-qr img { width: 152px; height: 152px; }

  .m-cta {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 88;
    display: flex; align-items: center; justify-content: center; gap: 9px;
    height: 56px; padding-bottom: env(safe-area-inset-bottom, 0);
    background: var(--dark); color: #fff;
    font-size: 16px; font-weight: 700; letter-spacing: .02em;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, .16);
  }
  .m-cta svg {
    width: 18px; height: 18px; fill: none; stroke: currentColor;
    stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
  }
  .m-cta:active { background: #000; }
}

/* ---------- 后台新增栏目的通用模板：子栏目链接 ---------- */
.subcat-links { display: flex; flex-wrap: wrap; gap: 10px; }
.subcat-link {
  display: inline-block; padding: 8px 18px; border: 1px solid #dcdde2;
  border-radius: 999px; color: var(--ink); font-size: 14px; text-decoration: none;
  transition: border-color .2s, background .2s;
}
.subcat-link:hover { border-color: var(--accent); background: #f5f7ff; }
.gen-empty { padding: 28px 0; color: #6b6c76; font-size: 15px; line-height: 1.8; }