/* ============================================================
   GeorgeLED 全站样式 v2.0（2026-09-23 改版）
   风格：深色 Hero + 浅色正文 · 电光蓝主色
   ------------------------------------------------------------
   维护说明：
   - 换主色调 → 只改 :root 里的 --accent 系列变量
   - 换字体 → 改 --font-base 和 head.html 里的字体链接
   - 全站间距/圆角 → 改 --radius / section padding 变量
   ============================================================ */

:root {
  /* 主色：电光蓝 */
  --accent:        #2E6BFF;
  --accent-bright: #5B8CFF;
  --accent-deep:   #1D4FD6;
  --accent-glow:   rgba(46, 107, 255, 0.35);

  /* 深色系（Hero / 页脚 / 导航） */
  --ink-900: #070B16;
  --ink-800: #0C1222;
  --ink-700: #141C33;
  --ink-line: rgba(255, 255, 255, 0.09);

  /* 浅色正文 */
  --bg:        #FFFFFF;
  --bg-soft:   #F4F6FB;
  --line:      #E4E9F2;
  --text:      #111A2E;
  --text-body: #4A5568;
  --text-muted: #8892A6;
  --text-light: #C4CCDC;   /* 深底上的次要文字 */

  --font-base: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
  --radius:    16px;
  --radius-sm: 10px;
  --shadow-card: 0 2px 6px rgba(16, 24, 40, 0.04), 0 12px 32px rgba(16, 24, 40, 0.06);
  --shadow-lift: 0 8px 16px rgba(16, 24, 40, 0.08), 0 24px 56px rgba(16, 24, 40, 0.12);
  --header-h: 76px;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scrollbar-gutter: stable; }
body {
  font-family: var(--font-base);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.15; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); }
h3 { font-size: 1.15rem; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600; font-size: 0.95rem;
  cursor: pointer; border: none;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
  box-shadow: 0 6px 20px var(--accent-glow);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px var(--accent-glow); }
.btn--outline {
  background: transparent; color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}
.btn--outline:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }
/* WhatsApp 实心绿按钮：浅色背景页面上高对比 */
.btn--whatsapp {
  background: #25d366; color: #06301a;
  border: 1.5px solid #1eb856;
  font-weight: 700;
}
.btn--whatsapp:hover { background: #1eb856; color: #06301a; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(37, 211, 102, 0.35); }
.btn--light { background: #fff; color: var(--ink-800); }
.btn--light:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0, 0, 0, 0.25); }
.btn--dark { background: var(--ink-800); color: #fff; }
.btn--dark:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(7, 11, 22, 0.3); }

/* ---------- 导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(7, 11, 22, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ink-line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo {
  font-size: 1.35rem; font-weight: 800; color: #fff;
  display: flex; align-items: center; gap: 9px; letter-spacing: -0.02em;
}
.logo-accent { color: var(--accent-bright); }
.logo-mark {
  width: 12px; height: 12px; border-radius: 3px;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent));
  box-shadow: 0 0 12px var(--accent-glow);
  display: inline-block;
}
/* v2.1 公司 LOGO：黑色图标 + 白色圆角底衬（深底导航上保持可见） */
.logo-badge {
  width: 40px; height: 40px; flex-shrink: 0;
  background: #fff; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  padding: 5px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}
.logo-badge img { width: 100%; height: 100%; object-fit: contain; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text-light); font-weight: 500; font-size: 0.92rem;
  padding: 9px 14px; border-radius: 999px;
  transition: color .2s, background .2s;
}
.main-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.07); }
.main-nav a.active { color: #fff; background: rgba(255, 255, 255, 0.1); }
.main-nav .nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff; margin-left: 10px; padding: 10px 20px;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.main-nav .nav-cta:hover { background: linear-gradient(135deg, var(--accent-bright), var(--accent)); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; }

/* ---------- Hero（首页：全屏大图） ---------- */
.hero {
  position: relative;
  min-height: 94vh;
  display: flex; align-items: center;
  background: var(--ink-900) url('../img/hero-city.webp') center / cover no-repeat;
  color: #fff;
  padding: calc(var(--header-h) + 60px) 0 120px;
}
/* 遮罩：左深右浅，保证文字可读 */
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(7, 11, 22, 0.92) 0%, rgba(7, 11, 22, 0.65) 45%, rgba(7, 11, 22, 0.25) 100%);
}
.hero > .container { position: relative; z-index: 1; max-width: 1200px; }
.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  font-weight: 800; letter-spacing: -0.03em;
  max-width: 720px; margin-bottom: 22px;
}
.text-accent {
  background: linear-gradient(120deg, var(--accent-bright), #8FB4FF);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent-bright);
  margin-bottom: 22px;
}
.hero-kicker::before {
  content: ""; width: 34px; height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.lead { font-size: 1.12rem; max-width: 560px; color: var(--text-light); margin-bottom: 36px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* 内页 Hero（深色 + 蓝色氛围光，无大图） */
.hero--page {
  min-height: 0;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(46, 107, 255, 0.28), transparent 60%),
    radial-gradient(700px 380px at 8% 110%, rgba(46, 107, 255, 0.16), transparent 60%),
    var(--ink-900);
  padding: calc(var(--header-h) + 84px) 0 84px;
}
.hero--page::before { display: none; }
.hero--page h1 { max-width: 780px; }

/* ---------- 统计条（首页 3 项 / 关于页 4 项；数字为占位，上线前需核实） ---------- */
.stats-overlap { margin-top: -72px; position: relative; z-index: 2; }
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  background: linear-gradient(160deg, var(--ink-700), var(--ink-800));
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  padding: 38px 44px;
  box-shadow: 0 24px 60px rgba(7, 11, 22, 0.45);
}
.stats-band--3 { grid-template-columns: repeat(3, 1fr); }
.stat-item { text-align: center; }
.stat-item b {
  font-size: 2.3rem; font-weight: 800; letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff, #A9C2FF);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-item b span { color: var(--accent-bright); -webkit-text-fill-color: var(--accent-bright); }
.stat-item p { color: var(--text-light); font-size: 0.88rem; margin-top: 6px; }

/* ---------- 区块 ---------- */
.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--ink-800); color: #fff; }
.section--dark h2 { color: #fff; }
.section-head { margin-bottom: 56px; max-width: 720px; }
.section-head--center { text-align: center; margin-left: auto; margin-right: auto; }
.section-head p, .section-kicker + h2 + p { color: var(--text-body); margin-top: 14px; font-size: 1.05rem; }
.section--dark .section-head p, .section--dark p { color: var(--text-light); }
.section-kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 14px;
}
.section-kicker::before { content: ""; width: 26px; height: 2px; background: var(--accent); }
.section-head--center .section-kicker::before { display: none; }

/* ---------- 网格 & 卡片 ---------- */
.grid { display: grid; gap: 26px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
  border-color: rgba(46, 107, 255, 0.35);
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--text-body); font-size: 0.95rem; }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.12), rgba(46, 107, 255, 0.05));
  border: 1px solid rgba(46, 107, 255, 0.18);
  color: var(--accent);
}
.card-icon svg { width: 24px; height: 24px; display: block; }
.card-link {
  display: inline-block; margin-top: 16px;
  color: var(--accent); font-weight: 600; font-size: 0.92rem;
}

/* 图文卡片（产品 / 案例 / 市场） */
.img-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.img-card .img-card__media { position: relative; overflow: hidden; aspect-ratio: 16 / 10; flex-shrink: 0; }
.img-card .img-card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s ease;
}
.img-card:hover .img-card__media img { transform: scale(1.06); }
.img-card .img-card__body { padding: 26px 28px 30px; flex: 1; display: flex; flex-direction: column; }
.img-card .img-card__body .card-link { margin-top: auto; padding-top: 16px; }

/* 市场页：图片上叠字 */
.tile-card { padding: 0; overflow: hidden; position: relative; min-height: 300px; display: flex; align-items: flex-end; border: none; }
.tile-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.tile-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 22, 0) 30%, rgba(7, 11, 22, 0.88) 100%);
}
.tile-card:hover img { transform: scale(1.06); }
.tile-card .tile-card__body { position: relative; z-index: 1; padding: 26px 28px; color: #fff; }
.tile-card .tile-card__body h3 { color: #fff; margin-bottom: 8px; }
.tile-card .tile-card__body p { color: var(--text-light); font-size: 0.9rem; }

/* v2.4 首页产品系列瓷砖（容器内一大两小，圆角卡片，图上叠字） */
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.showcase-tile {
  position: relative; overflow: hidden;
  border-radius: var(--radius);
  min-height: 340px;
  display: block;
  background: var(--ink-900);
}
.showcase-tile--wide { grid-column: 1 / -1; min-height: 430px; }
.showcase-tile img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .7s ease;
}
.showcase-tile::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(160deg, rgba(7, 11, 22, 0.78) 0%, rgba(7, 11, 22, 0.42) 38%, rgba(7, 11, 22, 0) 68%),
    radial-gradient(90% 70% at 12% 8%, rgba(7, 11, 22, 0.45) 0%, rgba(7, 11, 22, 0) 70%);
  transition: background .4s ease;
}
.showcase-tile:hover img { transform: scale(1.05); }
.showcase-tile__body {
  position: absolute; top: 34px; left: 36px; z-index: 1; color: #fff;
}
.showcase-tile__body h3 {
  color: #fff; font-size: 1.7rem; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 8px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.5);
}
.showcase-tile__body p {
  color: #f2f5fc; font-size: 0.92rem; max-width: 380px;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.7);
}
.showcase-tile__link {
  display: inline-block; margin-top: 12px;
  color: var(--accent-bright); font-weight: 600; font-size: 0.9rem;
}
.showcase-tile:hover .showcase-tile__link { text-decoration: underline; }

/* ---------- 产品规格表 ---------- */
.product-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.12), rgba(46, 107, 255, 0.05));
  color: var(--accent);
  font-size: 0.74rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 5px 12px; border-radius: 999px;
  margin-bottom: 14px;
}
.spec-list { list-style: none; margin: 18px 0 4px; }
.spec-list li {
  display: flex; justify-content: space-between; gap: 14px;
  padding: 9px 0; font-size: 0.9rem;
  border-bottom: 1px dashed var(--line);
  color: var(--text-body);
}
.spec-list li:last-child { border-bottom: none; }
.spec-list b { color: var(--text); text-align: right; font-weight: 600; }

/* ---------- 案例标签 ---------- */
.case-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.case-meta span {
  background: var(--bg-soft); border: 1px solid var(--line);
  padding: 4px 12px; border-radius: 999px;
  font-size: 0.78rem; font-weight: 600; color: var(--text-body);
}
/* 案例详情页：可点击的推荐产品胶囊 */
.case-meta--links a {
  background: var(--bg-soft); border: 1px solid var(--line);
  padding: 4px 12px; border-radius: 999px;
  font-size: 0.78rem; font-weight: 600; color: var(--accent-deep);
  transition: border-color .25s ease, background .25s ease;
}
.case-meta--links a::after { content: " →"; }
.case-meta--links a:hover { border-color: var(--accent); background: rgba(46, 107, 255, 0.08); }

/* ---------- v3.0 案例页：解决方案照片网格 ---------- */
.case-photo-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 18px; margin-top: 8px;
}
.case-photo {
  margin: 0; position: relative; overflow: hidden;
  border-radius: var(--radius); background: var(--ink-900);
  min-height: 240px;
}
.case-photo img {
  width: 100%; height: 100%; object-fit: cover;
  display: block; transition: transform .6s ease;
}
.case-photo:hover img { transform: scale(1.04); }
.case-photo--main { grid-column: 1 / -1; min-height: 420px; }
.case-photo figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 36px 22px 16px;
  background: linear-gradient(180deg, rgba(7,11,22,0), rgba(7,11,22,0.78));
  color: #fff; font-size: 0.9rem; font-weight: 600;
}
/* v4.4 案例总览：统一尺寸卡片网格（可点击） */
.case-photo-grid--uniform { margin-top: 22px; }
.case-photo-grid--uniform .case-photo { min-height: 230px; aspect-ratio: 16 / 10; }
a.case-photo { display: block; color: #fff; text-decoration: none; }
a.case-photo:hover { text-decoration: none; }
.case-photo__cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 36px 22px 16px;
  background: linear-gradient(180deg, rgba(7,11,22,0), rgba(7,11,22,0.78));
  color: #fff; font-size: 0.9rem; font-weight: 600;
  pointer-events: none;
}
.case-photo__cap::after {
  content: "View cases →"; display: block; margin-top: 4px;
  font-size: 0.76rem; font-weight: 600; color: rgba(255,255,255,0.85);
  opacity: 0; transform: translateY(4px);
  transition: opacity .3s ease, transform .3s ease;
}
a.case-photo:hover .case-photo__cap::after { opacity: 1; transform: translateY(0); }
.case-meta { margin-top: 18px; }

/* ---------- About: 全球合作伙伴照片墙 ---------- */
.partner-wall {
  columns: 3;
  column-gap: 18px;
  margin-top: 8px;
}
.partner-wall__item {
  position: relative;
  margin: 0 0 18px;
  border-radius: var(--radius);
  overflow: hidden;
  break-inside: avoid;
  background: var(--ink-900);
}
.partner-wall__item img {
  width: 100%;
  display: block;
  transition: transform .6s ease;
}
.partner-wall__item:hover img { transform: scale(1.04); }
.partner-wall__item figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 36px 20px 14px;
  background: linear-gradient(180deg, rgba(7,11,22,0), rgba(7,11,22,0.78));
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .3s ease, transform .3s ease;
  pointer-events: none;
}
.partner-wall__item:hover figcaption { opacity: 1; transform: translateY(0); }
@media (max-width: 900px) {
  .partner-wall { columns: 2; }
}
@media (max-width: 560px) {
  .partner-wall { columns: 1; }
}

/* ---------- v4.8 首页：Delivery & Support 分栏（深色面板 + 步骤列表） ---------- */
.support-split {
  display: grid; grid-template-columns: 5fr 7fr;
  gap: 56px; align-items: stretch; margin-top: 8px;
}
.support-feature {
  position: relative; overflow: hidden;
  background: linear-gradient(155deg, #0c1526 0%, #12203c 60%, #1a2f55 100%);
  color: #fff; border-radius: var(--radius);
  padding: 46px 42px;
  display: flex; flex-direction: column; justify-content: center;
  opacity: 0; transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease, box-shadow .3s ease;
}
.support-split.is-visible .support-feature { opacity: 1; transform: translateY(0); }
.support-feature:hover { box-shadow: 0 24px 56px rgba(7,11,22,0.22); }
.support-feature::after {
  content: ""; position: absolute; right: -90px; top: -90px;
  width: 280px; height: 280px; border-radius: 50%;
  background: radial-gradient(circle, rgba(46,107,255,0.28), rgba(46,107,255,0) 70%);
  pointer-events: none;
}
.support-feature__kicker {
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: rgba(255,255,255,0.55);
}
.support-feature__stat {
  font-size: 6.4rem; font-weight: 800; line-height: 1;
  letter-spacing: -0.045em; margin: 18px 0 8px; color: #fff;
  font-variant-numeric: tabular-nums;
}
.support-feature__stat small { font-size: 2rem; font-weight: 700; color: rgba(255,255,255,0.55); margin-left: 6px; letter-spacing: 0; }
.support-feature h3 { color: #fff; font-size: 1.3rem; margin-bottom: 10px; }
.support-feature > p { color: rgba(255,255,255,0.72); font-size: 0.92rem; line-height: 1.6; margin: 0; }
.support-minis {
  margin-top: 34px; padding-top: 26px;
  border-top: 1px solid rgba(255,255,255,0.14);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.support-mini b { font-size: 1.45rem; font-weight: 800; color: #fff; line-height: 1; }
.support-mini b span { color: #7ea8ff; font-size: 0.95rem; font-weight: 700; }
.support-mini p { font-size: 0.74rem; color: rgba(255,255,255,0.55); margin: 6px 0 0; }
.support-steps {
  display: flex; flex-direction: column; justify-content: center; gap: 4px;
}
.support-step {
  display: flex; gap: 22px; align-items: flex-start;
  padding: 24px 26px; border-radius: 14px;
  opacity: 0; transform: translateX(32px);
  transition: opacity .55s ease, transform .55s ease, background .25s ease;
}
.support-split.is-visible .support-step { opacity: 1; transform: translateX(0); }
.support-split.is-visible .support-step:nth-child(1) { transition-delay: .15s; }
.support-split.is-visible .support-step:nth-child(2) { transition-delay: .28s; }
.support-split.is-visible .support-step:nth-child(3) { transition-delay: .41s; }
.support-split.is-visible .support-step:nth-child(4) { transition-delay: .54s; }
.support-split.is-visible .support-step:nth-child(5) { transition-delay: .67s; }
.support-step:hover { background: var(--bg-soft); }
.support-step__badge {
  flex-shrink: 0;
  width: 46px; height: 46px; border-radius: 50%;
  border: 2px solid var(--accent); background: #fff;
  color: var(--accent); font-weight: 800; font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: background .25s ease, color .25s ease, transform .25s ease;
}
.support-step:hover .support-step__badge {
  background: var(--accent); color: #fff; transform: scale(1.08);
}
.support-step h3 { font-size: 1.05rem; margin: 0 0 6px; }
.support-step p { font-size: 0.88rem; color: var(--text-body); margin: 0; line-height: 1.6; }

@media (max-width: 960px) {
  .support-split { grid-template-columns: 1fr; gap: 32px; }
  .support-feature { padding: 36px 28px; }
  .support-feature__stat { font-size: 4.4rem; }
  .support-step { padding: 18px 16px; }
}

/* ---------- v3.0 首页认证轮播（自动无缝滚动，悬停暂停） ---------- */
.cert-band { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 54px 0; overflow: hidden; }
.cert-band .section-head { margin-bottom: 30px; }
.cert-marquee {
  display: flex; overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.cert-track {
  display: flex; gap: 22px; flex-shrink: 0;
  padding-right: 22px;
  animation: cert-scroll 36s linear infinite;
}
.cert-marquee:hover .cert-track { animation-play-state: paused; }
.cert-item {
  flex-shrink: 0; width: 150px; height: 200px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 10px; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(7, 11, 22, 0.05);
}
.cert-item img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
@keyframes cert-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-100%); }
}
@media (prefers-reduced-motion: reduce) {
  .cert-track { animation: none; }
}

/* ---------- 图文分栏 ---------- */
.split {
  display: grid; grid-template-columns: 1.05fr 1fr;
  gap: 64px; align-items: center;
}
.split p { color: var(--text-body); margin-bottom: 16px; }
.split .section-kicker { margin-bottom: 12px; }
.split h2 { margin-bottom: 18px; }

/* 图片块（带蓝色氛围光） */
.media-frame { position: relative; }
.media-frame::before {
  content: ""; position: absolute; inset: -18px auto auto -18px;
  width: 60%; height: 60%;
  background: radial-gradient(closest-side, var(--accent-glow), transparent);
  filter: blur(10px); z-index: 0;
}
.media-frame img {
  position: relative; z-index: 1;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  aspect-ratio: 4 / 3; object-fit: cover; width: 100%;
}
/* 产品详情页：宽幅场景图 / 箱体图按原始比例显示，不裁剪 */
.media-frame--natural img { aspect-ratio: auto; height: auto; }

/* ---------- 清单 ---------- */
.check-list { list-style: none; margin: 22px 0 6px; }
.check-list li {
  padding: 11px 0 11px 38px; position: relative;
  color: var(--text-body);
  border-bottom: 1px solid var(--line);
}
.section--dark .check-list li { border-bottom-color: var(--ink-line); }
.check-list li:last-child { border-bottom: none; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 11px;
  width: 24px; height: 24px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff; font-size: 0.75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.check-list b { color: var(--text); }
.section--dark .check-list b { color: #fff; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background:
    radial-gradient(700px 300px at 90% 0%, rgba(46, 107, 255, 0.35), transparent 60%),
    linear-gradient(120deg, var(--ink-800), var(--ink-900));
  color: #fff; padding: 76px 0;
}
.cta-band__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 36px; flex-wrap: wrap; position: relative; z-index: 1;
}
.cta-band h2 { margin-bottom: 10px; }
.cta-band p { color: var(--text-light); max-width: 520px; }

/* ---------- 表单 ---------- */
.form-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 40px;
  box-shadow: var(--shadow-lift);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field label {
  display: block; font-size: 0.86rem; font-weight: 600;
  margin-bottom: 7px; color: var(--text);
}
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 13px 15px;
  border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font-size: 0.95rem; font-family: inherit;
  background: var(--bg-soft);
  transition: border-color .2s, background .2s, box-shadow .2s;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(46, 107, 255, 0.12);
}
.form-field textarea { min-height: 130px; resize: vertical; }
.form-field--full { grid-column: 1 / -1; }

.contact-info-list { list-style: none; display: grid; gap: 22px; }
.contact-info-list li { display: flex; gap: 16px; align-items: flex-start; }
.ci-icon {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.12), rgba(46, 107, 255, 0.05));
  border: 1px solid rgba(46, 107, 255, 0.18);
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
}
.contact-info-list b { display: block; margin-bottom: 2px; }
.contact-info-list p { color: var(--text-body); font-size: 0.94rem; }
.contact-info-list a { color: var(--accent); font-weight: 600; }

/* v2.2 首页底部询盘区块（浅灰底 + 白卡，与深色页脚拉开层次） */
.quote-section { background: var(--bg-soft); }
.quote-section .quote-intro p { color: var(--text-body); margin-bottom: 16px; }

/* v2.2 页脚快速询盘（邮箱 + WhatsApp 双字段） */
.footer-quick {
  border-top: 1px solid var(--ink-line);
  padding: 30px 0;
}
.footer-quick__inner {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
}
.footer-quick__label { color: #fff; font-weight: 600; font-size: 0.98rem; flex-shrink: 0; }
.footer-quick__label small { display: block; color: var(--text-muted); font-weight: 400; font-size: 0.8rem; margin-top: 3px; }
.footer-quick form { display: flex; gap: 10px; flex: 1; flex-wrap: wrap; }
.footer-quick input {
  flex: 1; min-width: 180px;
  padding: 12px 16px;
  border: 1.5px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: #fff; font-size: 0.92rem; font-family: inherit;
  transition: border-color .2s, background .2s;
}
.footer-quick input::placeholder { color: var(--text-muted); }
.footer-quick input:focus {
  outline: none; border-color: var(--accent-bright);
  background: rgba(255, 255, 255, 0.1);
}
.footer-quick .btn { padding: 12px 26px; }

/* ---------- 提示框（博客占位说明） ---------- */
.notice-box {
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.08), rgba(46, 107, 255, 0.03));
  border: 1px solid rgba(46, 107, 255, 0.25);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  color: var(--text-body);
  font-size: 0.95rem;
}
.notice-box b { color: var(--text); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink-900); color: var(--text-light);
  padding: 72px 0 0;
  border-top: 1px solid var(--ink-line);
}
.footer-grid {
  display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.2fr;
  gap: 48px; padding-bottom: 52px;
}
.footer-brand p { font-size: 0.92rem; margin-top: 16px; max-width: 320px; }
.logo--footer { color: #fff; }
.site-footer h4 {
  color: #fff; font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-col a {
  display: block; padding: 5px 0;
  font-size: 0.93rem; color: var(--text-light);
  transition: color .2s, transform .2s;
}
.footer-col a:hover { color: var(--accent-bright); transform: translateX(3px); }
.footer-addr { font-size: 0.93rem; padding: 5px 0; }
.footer-bottom {
  border-top: 1px solid var(--ink-line);
  padding: 22px 24px; text-align: center;
  font-size: 0.85rem; color: var(--text-muted);
}

/* ---------- v4.1 产品详情页 ---------- */
/* 面包屑（深色 Hero 内 / WP 版正文顶部浅色背景均可读） */
/* ---------- 产品卡片整卡可点（stretched-link：主链接延展覆盖整卡） ---------- */
.product-card, .related-products .card { position: relative; cursor: pointer; }
.product-card .card-link, .related-products .card-link { position: static; }
.product-card .card-link::after, .related-products .card-link::after {
  content: ""; position: absolute; inset: 0; z-index: 2; border-radius: inherit;
}

/* ---------- 全局 WhatsApp 悬浮按钮 ---------- */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 999;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25D366; color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45), 0 2px 6px rgba(7, 11, 22, 0.18);
  transition: transform .25s ease, box-shadow .25s ease;
}
.wa-float svg { width: 30px; height: 30px; fill: currentColor; }
.wa-float:hover { transform: scale(1.08); box-shadow: 0 12px 30px rgba(37, 211, 102, 0.55), 0 3px 8px rgba(7, 11, 22, 0.2); }
.wa-float::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid rgba(37, 211, 102, 0.55);
  animation: wa-pulse 2.4s ease-out infinite;
}
@keyframes wa-pulse {
  0% { transform: scale(1); opacity: 1; }
  70% { transform: scale(1.45); opacity: 0; }
  100% { transform: scale(1.45); opacity: 0; }
}
@media (max-width: 640px) {
  .wa-float { right: 16px; bottom: 16px; width: 50px; height: 50px; }
  .wa-float svg { width: 26px; height: 26px; }
}

.pd-breadcrumb {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 0.85rem; color: var(--text-muted);
  margin-bottom: 26px;
}
.pd-breadcrumb a { color: var(--text-light); transition: color .2s; }
.pd-breadcrumb a:hover { color: var(--accent-bright); }
.pd-breadcrumb__current { color: var(--accent-bright); font-weight: 600; }
/* WP 版：面包屑在正文白色背景顶部 */
.pd-breadcrumb--light { color: var(--text-muted); padding-top: 34px; margin-bottom: 0; }
.pd-breadcrumb--light a { color: var(--text-body); }
.pd-breadcrumb--light a:hover { color: var(--accent); }
.pd-breadcrumb--light .pd-breadcrumb__current { color: var(--accent); }

/* 关键指标卡（Hero 下方，间距收紧） */
.pd-keyspecs { padding: 44px 0 0; }
.keyspec-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.keyspec-item {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 24px;
  box-shadow: var(--shadow-card);
}
.keyspec-item span {
  display: block; font-size: 0.76rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 8px;
}
.keyspec-item b { font-size: 1.18rem; font-weight: 700; color: var(--accent-deep); letter-spacing: -0.01em; }

/* 全量规格表（型号为列，宽表横向滚动，首列冻结） */
.spec-table-wrap {
  overflow-x: auto;
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-card);
}
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; min-width: 760px; }
.spec-table th, .spec-table td {
  padding: 11px 16px; text-align: center;
  border-bottom: 1px solid var(--line);
  color: var(--text-body); white-space: nowrap;
}
.spec-table thead th {
  background: var(--ink-800); color: #fff;
  font-weight: 600; font-size: 0.85rem; letter-spacing: 0.02em;
}
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table tbody tr:nth-child(even) td { background: var(--bg-soft); }
.spec-table tbody tr:hover td { background: #EDF3FF; }
/* 首列：参数名，左对齐 + 冻结 */
.spec-table td:first-child, .spec-table th:first-child {
  text-align: left; font-weight: 600; color: var(--text);
  position: sticky; left: 0; background: #fff;
  box-shadow: 1px 0 0 var(--line);
}
.spec-table thead th:first-child { background: var(--ink-800); color: #fff; }
.spec-table tbody tr:nth-child(even) td:first-child { background: var(--bg-soft); }
.spec-table tbody tr:hover td:first-child { background: #EDF3FF; }
/* 控制器：键值表 / IO 表 */
.spec-table--kv td, .spec-table--io td { text-align: left; white-space: normal; }
.spec-table--kv td:first-child { min-width: 220px; }
.spec-table .spec-group {
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.10), rgba(46, 107, 255, 0.04));
  color: var(--accent-deep) !important; font-weight: 700; text-align: left;
  position: static;
}
.spec-note { font-size: 0.8rem; color: var(--text-muted); margin-top: 14px; }

@media (max-width: 960px) {
  .keyspec-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .keyspec-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .keyspec-item b { font-size: 1.02rem; }
}

/* ---------- FAQ 手风琴（details/summary 纯 CSS） ---------- */
.faq-group { margin-bottom: 42px; }
.faq-group h2 { font-size: 1.3rem; margin-bottom: 16px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 10px; overflow: hidden; transition: box-shadow .2s; }
.faq-item:hover { box-shadow: var(--shadow-lift); }
.faq-item summary {
  cursor: pointer; list-style: none; position: relative;
  padding: 16px 52px 16px 20px; font-weight: 600; color: var(--ink-800); font-size: 0.98rem;
  border-bottom: 1px solid transparent;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-size: 1.35rem; font-weight: 400; color: var(--accent); line-height: 1;
}
.faq-item[open] summary { border-bottom-color: var(--line); }
.faq-item[open] summary::after { content: "−"; }
.faq-a { padding: 14px 20px 18px; color: var(--text-body); font-size: 0.95rem; line-height: 1.75; }

/* ---------- About：负责人卡片 & 认证墙 ---------- */
.leader-grid { display: grid; grid-template-columns: 340px 1fr; gap: 56px; align-items: start; }
.leader-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-lift); padding: 22px;
}
.leader-card img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: calc(var(--radius) - 6px); display: block; }
.leader-facts { display: flex; gap: 8px; margin-top: 16px; text-align: center; }
.leader-facts > div { flex: 1; }
.leader-facts b { display: block; font-size: 0.98rem; color: var(--ink-800); }
.leader-facts span { font-size: 0.76rem; color: var(--text-muted); }
.leader-tags { margin: 14px 0 28px; }
.cert-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.cert-grid img {
  width: 100%; aspect-ratio: 1; object-fit: contain;
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 10px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.cert-grid img:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); border-color: var(--accent); }
@media (max-width: 900px) {
  .leader-grid { grid-template-columns: 1fr; }
  .leader-card { max-width: 360px; margin: 0 auto; }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .stats-band { grid-template-columns: repeat(2, 1fr); padding: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .section { padding: 72px 0; }
  .showcase { grid-template-columns: 1fr; }
  .showcase-tile--wide { min-height: 340px; }
  .case-photo-grid { grid-template-columns: 1fr; }
  .case-photo--main { min-height: 300px; }
  .footer-quick__inner { flex-direction: column; align-items: stretch; }
}
@media (max-width: 640px) {
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: 0; padding-bottom: 100px; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    background: rgba(7, 11, 22, 0.97);
    flex-direction: column; align-items: stretch;
    padding: 16px; gap: 4px;
    border-bottom: 1px solid var(--ink-line);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 16px; }
  .main-nav .nav-cta { margin: 8px 0 0; text-align: center; }
}

/* ===== 首页滚动帧动画首屏（hero--seq） ===== */
.hero--seq {
  display: block; /* 覆盖 .hero 的 flex 居中，否则 sticky 子元素收缩 */
  min-height: 280vh;
  padding: 0;
  background: #070B16;
}
.hero--seq::before { display: none; } /* 遮罩改由 .hero__scrim 随画布固定 */
.hero-seq__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-seq__poster,
.hero-seq__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-seq__canvas { z-index: 1; }
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(100deg, rgba(7, 11, 22, 0.92) 0%, rgba(7, 11, 22, 0.65) 45%, rgba(7, 11, 22, 0.25) 100%);
  pointer-events: none;
}
.hero-seq__content { position: relative; z-index: 3; width: 100%; max-width: 1200px; }
.hero-seq__hint {
  display: block;
  margin-top: 46px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--text-light);
  animation: heroSeqHint 2.2s ease-in-out infinite;
}
@keyframes heroSeqHint { 50% { opacity: 0.35; } }
.hero--seq.is-scrolled .hero-seq__hint { opacity: 0; animation: none; transition: opacity 0.4s; }
/* 降级：无 JS 或 prefers-reduced-motion —— 静态首帧 + 正常高度 */
.hero--seq--static { min-height: 94vh; }
.hero--seq--static .hero-seq__sticky { position: relative; height: 94vh; }
.hero--seq--static .hero-seq__canvas,
.hero--seq--static .hero-seq__hint { display: none; }

/* 首屏分段文案（随帧动画进度连续渐变，JS 逐帧驱动 opacity/transform） */
.hero-seq__stages { position: relative; }
.hero-seq__stage { will-change: opacity, transform; }
.hero-seq__stage:not(.is-active) {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  opacity: 0;
  transform: translateY(18px);
  pointer-events: none;
}
.hero-seq__title {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  max-width: 720px;
  margin: 0 0 22px;
  color: #fff;
}

/* ============================================================
   博客文章页：双栏布局 + 悬浮侧栏 + 作者头像（2026-10-23）
   版式参考 georgebeyond.com，配色沿用本站变量
   ============================================================ */

/* --- 作者行（hero 内，深底） --- */
.article-byline {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
}
.article-byline__avatar img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.25);
}
.article-byline__text { display: flex; flex-direction: column; gap: 2px; }
.article-byline__name { color: #fff; font-weight: 600; font-size: 0.98rem; }
.article-byline__meta { color: var(--text-light); font-size: 0.88rem; }

/* --- 双栏布局 --- */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 56px;
  /* 注意：不能加 align-items:start —— 侧栏必须随网格行拉伸到正文全高，
     否则 sticky 子块没有可滚动的行程，悬浮跟随会失效 */
}
.article-sidebar { align-self: stretch; }
.article-main { min-width: 0; }

.article-featured { margin-bottom: 36px; }
.article-featured img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* --- 正文排版（此前无专门样式） --- */
.article-content { color: var(--text-body); font-size: 1.05rem; line-height: 1.8; }
.article-content > *:first-child { margin-top: 0; }
.article-content h2 {
  color: var(--text);
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  margin: 2.4em 0 0.8em;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.article-content h3 {
  color: var(--text);
  font-size: 1.25rem;
  margin: 2em 0 0.7em;
}
.article-content p { margin: 0 0 1.3em; }
.article-content ul, .article-content ol { margin: 0 0 1.4em 1.3em; }
.article-content li { margin-bottom: 0.55em; }
.article-content li::marker { color: var(--accent); }
.article-content a { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--accent); }
.article-content strong { color: var(--text); }
.article-content img { border-radius: var(--radius-sm); margin: 1.6em auto; }
.article-content blockquote {
  margin: 1.8em 0;
  padding: 18px 24px;
  background: var(--bg-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text);
  font-weight: 500;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 0.95rem;
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.article-content th, .article-content td {
  padding: 12px 16px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.article-content th { background: var(--ink-800); color: #fff; font-weight: 600; }
.article-content tr:nth-child(even) td { background: var(--bg-soft); }

/* --- 悬浮侧栏 --- */
.article-sidebar__sticky {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.side-card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
}
.side-card__title { font-size: 1.2rem; margin: 0 0 8px; color: var(--text); }
.side-card__sub { font-size: 0.9rem; color: var(--text-body); margin: 0 0 18px; }

.side-form { display: flex; flex-direction: column; gap: 10px; }
.side-form input, .side-form textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  resize: vertical;
}
.side-form input:focus, .side-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.side-form__btn { width: 100%; justify-content: center; margin-top: 4px; }

.side-wa__btn {
  display: block;
  text-align: center;
  background: #25D366;
  color: #fff;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 999px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.side-wa__btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(37, 211, 102, 0.4); }

/* --- 移动端：单栏，侧栏落到正文下方 --- */
@media (max-width: 960px) {
  .article-layout { grid-template-columns: 1fr; gap: 40px; }
  .article-sidebar__sticky { position: static; }
}