/* ============================================================
   驰哲易联 CHISELINK — 官网视觉系统（极简商务浅色版）
   白底 #FFFFFF / 区块 #F5F8FB / 企业蓝 #185FA5 / 深色反转区 #0A1628
   ============================================================ */

:root {
  --bg: #FFFFFF;
  --bg-soft: #F5F8FB;
  --bg-alt: #EAF2FA;
  --bg-deep: #0A1628;
  --card: #FFFFFF;
  --card-hover: #FCFDFF;
  --line: rgba(24, 95, 165, 0.16);
  --line-strong: rgba(24, 95, 165, 0.35);
  --accent: #185FA5;
  --accent-2: #2A7FD4;
  --accent-soft: rgba(24, 95, 165, 0.08);
  --accent-glow: rgba(24, 95, 165, 0.18);
  --cyan: #2AD4EF;
  --cyan-deep: #0FA3C0;
  --cyan-glow: rgba(42, 212, 239, 0.35);
  --text: #12233D;
  --text-dim: #4A5F7E;
  --text-mute: #6B7F9B;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(16, 40, 80, 0.06);
  --shadow-md: 0 10px 30px rgba(16, 40, 80, 0.10);
  --shadow-lg: 0 18px 46px rgba(16, 40, 80, 0.14);
  --font-cn: "Source Han Sans CN", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-num: "Chakra Petch", "DIN Alternate", "Bahnschrift", "Segoe UI", monospace;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

::selection { background: var(--accent); color: #FFFFFF; }

a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.num, .metric-num, .hotline-num, .stat-num { font-family: var(--font-num); letter-spacing: 0.02em; }

/* ---------------- 顶部工具条 ---------------- */

.topbar {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-dim);
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
}

.topbar a:hover { color: var(--accent); }
.topbar-left, .topbar-right { display: flex; gap: 20px; align-items: center; }
.topbar .sep { color: var(--line-strong); }

/* ---------------- 主导航 ---------------- */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header .container {
  display: flex;
  align-items: center;
  gap: 16px;
  width: min(1340px, 94%);
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-img {
  height: 42px;
  width: auto;
  display: block;
}
.footer .logo-img { height: 42px; }

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 100%);
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-weight: 700;
  color: #FFFFFF;
  font-size: 18px;
  box-shadow: var(--shadow-sm);
}

.logo-text { line-height: 1.2; }
.logo-text strong { display: block; font-size: 17px; letter-spacing: 0.06em; color: var(--text); }
.logo-text span {
  display: block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--accent);
}

.nav { flex: 1; min-width: 0; }
.nav ul { display: flex; justify-content: center; gap: 2px; flex-wrap: nowrap; }

.nav a {
  display: block;
  padding: 8px 9px;
  font-size: 14px;
  color: var(--text-dim);
  border-radius: 8px;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}

.nav a:hover { color: var(--accent); background: var(--accent-soft); }
.nav a.active { color: var(--accent); }
.nav a.active::after {
  content: "";
  position: absolute;
  left: 9px; right: 9px; bottom: 2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.hotline { text-align: right; line-height: 1.25; }
.hotline-label { display: block; font-size: 11px; color: var(--text-mute); letter-spacing: 0.1em; }
.hotline-num {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 19px;
  font-weight: 700;
  color: var(--accent);
}
.hotline-num svg { flex-shrink: 0; }
.hotline-num:hover { color: var(--accent-2); }

/* 深色区块内的热线号码需提亮，保证对比度 */
.cta-band .hotline-num, .footer .hotline-num { color: var(--cyan); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-cn);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover { box-shadow: 0 6px 22px rgba(24, 95, 165, 0.32); transform: translateY(-1px); }

.btn-outline {
  border-color: var(--line-strong);
  color: var(--accent);
  background: var(--accent-soft);
}
.btn-outline:hover { background: rgba(24, 95, 165, 0.14); }

.btn-login {
  padding: 8px 16px;
  font-size: 14px;
  border-color: var(--line-strong);
  color: var(--accent);
  background: var(--accent-soft);
}
.btn-login:hover { background: rgba(24, 95, 165, 0.14); border-color: var(--accent); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  width: 42px; height: 42px;
  color: var(--cyan);
  font-size: 20px;
  cursor: pointer;
}

/* ---------------- Hero ---------------- */

.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, #F2F7FC 0%, #FFFFFF 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(55% 55% at 75% 35%, rgba(42, 127, 212, 0.10), transparent 65%),
    radial-gradient(40% 40% at 12% 85%, rgba(24, 95, 165, 0.07), transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--accent);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 16px;
  background: var(--accent-soft);
  margin-bottom: 26px;
}
.hero-eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }

.hero h1 {
  font-size: clamp(30px, 4.2vw, 50px);
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 12px;
}
.hero h1 em { font-style: normal; color: var(--accent); }

.hero-sub {
  font-family: var(--font-num);
  color: var(--text-mute);
  letter-spacing: 0.3em;
  font-size: 14px;
  margin-bottom: 20px;
}

.hero-desc { color: var(--text-dim); max-width: 520px; margin-bottom: 34px; }

.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 46px; }

.hero-metrics { display: flex; gap: 44px; flex-wrap: wrap; }
.metric-num {
  font-size: 34px;
  font-weight: 700;
  color: var(--accent);
}
.metric-label { font-size: 13px; color: var(--text-mute); margin-top: 2px; }

.hero-visual { position: relative; }
.hero-visual img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 18px;
  background: linear-gradient(200deg, rgba(42, 127, 212, 0.08), transparent 42%);
  pointer-events: none;
}

.hero-hotline-card {
  position: absolute;
  left: -22px;
  bottom: 26px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 22px;
  box-shadow: var(--shadow-lg);
}
.hero-hotline-card .hotline-label { color: var(--text-dim); }
.hero-hotline-card .hotline-num { font-size: 26px; }

/* ---------------- 通用区块 ---------------- */

.section { padding: 84px 0; position: relative; }
.section-alt { background: var(--bg-soft); }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.section-tag {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.section-title { font-size: clamp(24px, 3vw, 34px); font-weight: 700; }
.section-desc { color: var(--text-dim); margin-top: 14px; }

/* ---------------- 卡片 ---------------- */

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s, background 0.25s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--card-hover);
  box-shadow: var(--shadow-lg);
}

.card-img { position: relative; overflow: hidden; background: var(--bg-soft); }
.card-img img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform 0.5s; }
.card:hover .card-img img { transform: scale(1.05); }

.card-body { padding: 26px; }
.card-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: 12px;
  background: var(--accent-soft);
}
.card-title { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card-desc { color: var(--text-dim); font-size: 14.5px; }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}
.card-link:hover { color: var(--accent-2); }

/* 竖版产品图（如行李柜长图）完整展示，不做裁切 */
.card-img.tall img { object-fit: contain; background: #F7FAFC; }
.product-figure {
  background: #F7FAFC;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: grid;
  place-items: center;
  min-height: 420px;
}
.product-figure img { max-height: 620px; width: auto; max-width: 100%; object-fit: contain; }

/* 型号切换 */
.model-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.model-tab {
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  font-family: var(--font-cn);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  text-align: left;
}
.model-tab:hover { background: rgba(24, 95, 165, 0.14); }
.model-tab.active { background: var(--accent); border-color: var(--accent); color: #FFFFFF; }
.model-tab small { display: block; font-size: 12px; opacity: 0.85; margin-top: 2px; }
.model-spec { color: var(--text-dim); font-size: 15px; margin-bottom: 20px; }

/* 规格参数表 */
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.spec-table th, .spec-table td { padding: 13px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec-table tr:nth-child(odd) td { background: #F7FAFD; }
.spec-table td:first-child { width: 34%; color: var(--text-dim); }
.spec-table td:last-child { color: var(--text); }

/* 解决方案大卡 */
.solution-card { display: grid; grid-template-rows: auto 1fr; }
.solution-card ul { margin-top: 14px; }
.solution-card li {
  color: var(--text-dim);
  font-size: 14px;
  padding-left: 20px;
  position: relative;
  margin-bottom: 7px;
}
.solution-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 8px; height: 2px;
  background: var(--accent);
}

/* ---------------- 页面横幅（子页） ---------------- */

.page-hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(55% 90% at 80% 10%, rgba(42, 127, 212, 0.10), transparent 60%),
    var(--bg-soft);
  border-bottom: 1px solid var(--line);
}
.page-hero .crumb { font-size: 13px; color: var(--text-mute); margin-bottom: 14px; }
.page-hero .crumb a:hover { color: var(--accent); }
.page-hero h1 { font-size: clamp(26px, 3.4vw, 38px); }
.page-hero p { color: var(--text-dim); margin-top: 12px; max-width: 680px; }

/* ---------------- 特性/优势 ---------------- */

.feature {
  padding: 28px;
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  border: 1px solid var(--line-strong);
  color: var(--accent);
  margin-bottom: 18px;
}

/* ---------------- 数据条 ---------------- */

.stats-band {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 40px 0;
}
.stats-band .container { display: flex; justify-content: space-around; gap: 30px; flex-wrap: wrap; text-align: center; }
.stat-num { font-size: 38px; font-weight: 700; color: var(--accent); }
.stat-label { color: var(--text-dim); font-size: 14px; }

/* ---------------- 新闻列表 ---------------- */

.news-item {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: 26px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.2s;
}
.news-item:hover { padding-left: 8px; }
.news-date { text-align: center; border-right: 1px solid var(--line); padding-right: 22px; }
.news-date .d { font-family: var(--font-num); font-size: 28px; font-weight: 700; color: var(--accent); line-height: 1.1; }
.news-date .ym { font-size: 13px; color: var(--text-mute); }
.news-title { font-size: 18px; font-weight: 600; }
.news-item:hover .news-title { color: var(--accent); }
.news-summary { color: var(--text-dim); font-size: 14px; margin-top: 6px; }
.news-arrow { color: var(--text-mute); font-size: 22px; }
.news-item:hover .news-arrow { color: var(--accent); }

.news-body { max-width: 820px; margin: 0 auto; }
.news-body h2 { margin: 34px 0 14px; font-size: 22px; }
.news-body p { color: var(--text-dim); margin-bottom: 16px; }
.news-meta { color: var(--text-mute); font-size: 14px; margin: 12px 0 36px; }

/* ---------------- 下载 ---------------- */

.download-row {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 16px;
  transition: border-color 0.2s, transform 0.2s;
}
.download-row:hover { border-color: var(--line-strong); transform: translateX(4px); }
.download-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--line-strong);
  display: grid;
  place-items: center;
  color: var(--accent);
  flex-shrink: 0;
}
.download-info { flex: 1; }
.download-title { font-weight: 600; }
.download-meta { font-size: 13px; color: var(--text-mute); margin-top: 2px; }

/* ---------------- 表单 ---------------- */

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full { grid-column: 1 / -1; }

.field label { display: block; font-size: 14px; color: var(--text-dim); margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: #FBFCFE;
  color: var(--text);
  font-size: 15px;
  font-family: var(--font-cn);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-mute); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.field textarea { min-height: 120px; resize: vertical; }

.form-tip { font-size: 14px; margin-top: 14px; min-height: 22px; }
.form-tip.ok { color: #2F855A; }
.form-tip.err { color: #C0392B; }

/* 联系区块（浅色对比区块） */
.contact-section {
  background: linear-gradient(160deg, #F4F9FF 0%, #E5F1FB 100%);
  color: #12233D;
}
.contact-section .section-tag { color: var(--accent); }
.contact-section .section-desc { color: #4A5F7E; }
.contact-wrap { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.contact-info-item { display: flex; gap: 16px; margin-bottom: 26px; align-items: flex-start; }
.contact-info-item .ci-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid #D4E6F5;
  display: grid;
  place-items: center;
  color: var(--cyan-deep);
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(15, 90, 140, 0.08);
}
.contact-info-item strong { display: block; font-size: 15px; }
.contact-info-item span { color: #4A5F7E; font-size: 14px; }
.contact-info-item .big { font-family: var(--font-num); font-size: 22px; font-weight: 700; color: var(--accent); }

.contact-form-card {
  background: #fff;
  border-radius: 18px;
  padding: 38px;
  box-shadow: 0 24px 60px rgba(10, 40, 80, 0.12);
  border: 1px solid #E0EDF8;
}
.contact-form-card .field label { color: #33465F; }
.contact-form-card .field input,
.contact-form-card .field textarea {
  background: #F6FAFE;
  border-color: #D9E8F5;
  color: #12233D;
}

/* ---------------- CTA 带 ---------------- */

.cta-band {
  text-align: center;
  padding: 76px 0;
  background:
    radial-gradient(50% 100% at 50% 0%, rgba(42, 212, 239, 0.16), transparent 70%),
    var(--bg-deep);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 14px; color: #FFFFFF; }
.cta-band p { color: rgba(234, 243, 255, 0.72); margin-bottom: 30px; }
.cta-band .hotline-num { font-size: 34px; justify-content: center; margin-bottom: 26px; }

/* ---------------- 页脚 ---------------- */

.footer {
  position: relative;
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  padding: 64px 0 0;
  overflow: hidden;
  color: #EAF3FF;
}

.footer::after {
  content: "CZYL";
  position: absolute;
  right: -2%;
  bottom: -6%;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(120px, 18vw, 240px);
  color: rgba(42, 212, 239, 0.09);
  pointer-events: none;
  line-height: 1;
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 46px;
}

.footer .logo-text strong { color: #FFFFFF; }
.footer .logo-text span { color: var(--cyan); }
.footer-brand p { color: rgba(234, 243, 255, 0.62); font-size: 14px; margin-top: 16px; max-width: 300px; }
.footer h4 { font-size: 15px; margin-bottom: 18px; color: #FFFFFF; }
.footer-col a, .footer-col span { display: block; color: rgba(234, 243, 255, 0.62); font-size: 14px; margin-bottom: 11px; transition: color 0.2s; }
.footer-col a:hover { color: var(--cyan); }

.footer-bottom {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(234, 243, 255, 0.5);
}

/* ---------------- 时间线（关于页） ---------------- */

.timeline { position: relative; padding-left: 34px; max-width: 760px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(24, 95, 165, 0.12));
}
.timeline-item { position: relative; padding-bottom: 38px; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px; top: 7px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
}
.timeline-year { font-family: var(--font-num); color: var(--accent); font-weight: 700; font-size: 18px; }
.timeline-item h3 { font-size: 17px; margin: 4px 0 6px; }
.timeline-item p { color: var(--text-dim); font-size: 14.5px; }

/* ---------------- 流程步骤 ---------------- */

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step { position: relative; padding: 30px 24px; }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  color: rgba(24, 95, 165, 0.22);
  display: block;
  margin-bottom: 10px;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-dim); }

/* ---------------- 404 ---------------- */

.not-found { text-align: center; padding: 140px 0; }
.not-found .code { font-family: var(--font-num); font-size: 96px; font-weight: 700; color: var(--accent); }
.not-found p { color: var(--text-dim); margin: 12px 0 30px; }

/* ---------------- 动效 ---------------- */

.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1240px) {
  /* 屏幕变窄先收起头部热线（Hero 浮卡/CTA/页脚仍有），导航收紧保持单行 */
  .header .hotline { display: none; }
  .nav a { padding: 8px 7px; font-size: 13.5px; }
}

@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-hotline-card { left: 12px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 96px 1fr; }
  .news-arrow { display: none; }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    background: #FFFFFF;
    border-bottom: 1px solid var(--line);
    padding: 14px 4%;
    box-shadow: var(--shadow-md);
  }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; align-items: stretch; }
  .nav a { padding: 12px 14px; font-size: 16px; }
  .nav-toggle { display: block; }
  .header .container { justify-content: space-between; }
  .header-actions { margin-left: auto; }
}

@media (max-width: 560px) {
  .topbar { display: none; }
  .hero { padding: 56px 0; }
  .hero-metrics { gap: 26px; }
  .footer-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .btn-login span { display: none; }
}