/* CSS · assets/style.css · Haihua Machinery — v2 高端版（中文站 + 英文站共用） */

:root {
  --ink: #0a141f;
  --navy: #0d1b2a;
  --navy-2: #132538;
  --steel: #1b3145;
  --brass: #c0955c;
  --brass-2: #a67b43;
  --brass-soft: rgba(192, 149, 92, 0.14);
  --paper: #fbfaf6;
  --bg-soft: #f3f1ea;
  --line: #e4e0d6;
  --line-2: #efece4;
  --muted: #6e6b63;
  --text: #1a1c1e;
  --radius: 2px;
  --max: 1200px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
  color: var(--text);
  background: var(--paper);
  line-height: 1.72;
  font-size: 15.5px;
  font-feature-settings: "tnum" 1, "kern" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button, input, select, textarea { font-family: inherit; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }

/* ---------- 图片占位 ---------- */
.ph {
  position: relative;
  background: repeating-linear-gradient(45deg, #f2f0ea 0 12px, #eae7df 12px 24px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9a968c;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  padding: 12px;
  border: 1px solid var(--line);
}
.ph::after { content: attr(data-label); }
.ph--hero { aspect-ratio: 16 / 7; border: 0; }
.ph--card { aspect-ratio: 4 / 3; border: 0; }
.ph--wide { aspect-ratio: 16 / 9; border: 0; }
.ph--square { aspect-ratio: 1 / 1; border: 0; }

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 38px;
  gap: 16px;
}
.topbar a:hover { color: #fff; }
.topbar-left { display: flex; gap: 26px; flex-wrap: wrap; }
.topbar-left span { position: relative; opacity: 0.9; }
.topbar-left span + span::before {
  content: "";
  position: absolute;
  left: -13px; top: 50%;
  width: 1px; height: 10px;
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-50%);
}
.lang { display: flex; gap: 6px; align-items: center; letter-spacing: 0.1em; }
.lang a {
  padding: 3px 10px;
  border: 1px solid transparent;
  border-radius: 1px;
  font-size: 11.5px;
}
.lang a.on { border-color: rgba(192, 149, 92, 0.55); color: var(--brass); }

/* ---------- 导航 ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(251, 250, 246, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.25s;
}
header.site.scrolled { box-shadow: 0 12px 32px -24px rgba(10, 20, 31, 0.55); }
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 92px;
  gap: 36px;
}
.logo { display: flex; align-items: center; gap: 14px; }
.logo-img {
  height: 62px; width: auto; display: block;
  mix-blend-mode: multiply;   /* 让图内残余白底与米白页头自然融合，无白框 */
}
.logo-text {
  display: flex; flex-direction: column; justify-content: center;
  padding-left: 14px; border-left: 1px solid var(--line);
}
.logo-mark {
  width: 40px; height: 40px;
  background: var(--ink);
  color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: 17px;
}
.logo-text strong {
  display: block; font-size: 19px; letter-spacing: 0.14em;
  line-height: 1.2; font-weight: 700; color: var(--ink);
}
.logo-text span {
  display: block; font-size: 9px; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--muted); margin-top: 5px;
}

nav.main { display: flex; gap: 34px; align-items: center; margin-left: auto; }
nav.main a {
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 8px 0;
  color: #3a3d40;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
nav.main a:hover { color: var(--ink); border-bottom-color: var(--brass); }
nav.main a.active { color: var(--ink); border-bottom-color: var(--brass); }

.btn {
  display: inline-block;
  background: var(--brass);
  color: #17120a;
  padding: 15px 34px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  border: 0;
  cursor: pointer;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover { background: var(--brass-2); color: #17120a; transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.38);
  color: #fff;
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: rgba(255, 255, 255, 0.68); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: var(--steel); color: #fff; }

.menu-toggle {
  display: none;
  background: none; border: 0;
  padding: 10px 8px; width: 42px; height: 42px;
  cursor: pointer;
}
.menu-toggle span {
  display: block; height: 2px; background: var(--ink);
  margin: 5px 0; transition: transform 0.22s, opacity 0.22s;
}
.menu-toggle.on span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.on span:nth-child(2) { opacity: 0; }
.menu-toggle.on span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  color: #fff;
  overflow: hidden;
  padding: 0;
}
.hero-bg { position: absolute; inset: 0; background: var(--ink); z-index: 0; }
.hero-bg img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.62; }
.hero-bg::before { content: none; }
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(96deg, rgba(8, 16, 26, 0.94) 0%, rgba(8, 16, 26, 0.82) 42%, rgba(8, 16, 26, 0.38) 100%),
    linear-gradient(180deg, rgba(8, 16, 26, 0.5) 0%, rgba(8, 16, 26, 0) 38%, rgba(8, 16, 26, 0.86) 100%);
}
.hero .wrap {
  position: relative;
  z-index: 1;
  padding-top: 132px;
  padding-bottom: 128px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--brass);
  font-weight: 600;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.eyebrow::before {
  content: "";
  display: block;
  width: 30px; height: 1px;
  background: var(--brass);
  opacity: 0.85;
  flex: 0 0 auto;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.015em;
  max-width: 900px;
  margin-bottom: 28px;
}
.hero p.lead {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.72);
  max-width: 700px;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 数据条 ---------- */
.stats { background: var(--ink); color: #fff; border-top: 1px solid rgba(255, 255, 255, 0.08); }
.stats .wrap {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  padding-top: 46px;
  padding-bottom: 46px;
  gap: 0;
}
.stat { text-align: center; padding: 0 10px; border-right: 1px solid rgba(255, 255, 255, 0.1); }
.stat:last-child { border-right: 0; }
.stat strong {
  display: block;
  font-size: 36px;
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 8px;
}
.stat span {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass);
  opacity: 0.85;
}

/* ---------- 版块 ---------- */
section { padding: 104px 0; }
section.soft { background: var(--bg-soft); }
section.dark { background: var(--ink); color: #fff; }
section[id], div[id] { scroll-margin-top: 152px; }

.section-head { max-width: 780px; margin-bottom: 56px; }
.section-head .eyebrow { margin-bottom: 18px; }
.section-head h2 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.28;
  font-weight: 600;
  letter-spacing: -0.012em;
  margin-bottom: 18px;
}
.section-head p { color: var(--muted); font-size: 15.5px; line-height: 1.85; }
section.dark .section-head p { color: rgba(255, 255, 255, 0.62); }
section.dark .section-head h2 { color: #fff; }

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

/* ---------- 分类卡 ---------- */
.cat-card {
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
  display: flex;
  flex-direction: column;
}
.cat-card:hover {
  border-color: transparent;
  box-shadow: 0 28px 56px -30px rgba(10, 20, 31, 0.42);
  transform: translateY(-4px);
}
.cat-card .body { padding: 26px 26px 30px; flex: 1; display: flex; flex-direction: column; }
.cat-card h3 { font-size: 17.5px; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.005em; }
.cat-card p { font-size: 13.5px; color: var(--muted); flex: 1; line-height: 1.8; }
.cat-card .more {
  margin-top: 20px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass-2);
  font-weight: 600;
}
.cat-card .more::after { content: " →"; }

/* ---------- 优势 ---------- */
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 44px 56px; }
.feature { display: flex; gap: 22px; }
.feature .num {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--brass-2);
  padding-top: 4px;
  border-top: 1px solid var(--brass);
  height: fit-content;
  min-width: 34px;
}
.feature h3 { font-size: 16.5px; font-weight: 600; margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--muted); line-height: 1.82; }

/* ---------- 产品卡 ---------- */
.prod-card {
  border: 1px solid var(--line);
  background: #fff;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}
.prod-card:hover {
  border-color: transparent;
  box-shadow: 0 24px 48px -28px rgba(10, 20, 31, 0.38);
  transform: translateY(-3px);
}
.prod-card .body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.prod-card .tag {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass-2);
  font-weight: 600;
  margin-bottom: 10px;
}
.prod-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 9px; line-height: 1.45; }
.prod-card p { font-size: 13px; color: var(--muted); flex: 1; line-height: 1.78; }
.prod-card .link {
  margin-top: 18px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink);
}
.prod-card .link::after { content: " \2192"; }
.prod-card:hover .link { color: var(--brass-2); }

/* ---------- 应用行业 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.app-card {
  position: relative;
  overflow: hidden;
  display: block;
  aspect-ratio: 4 / 5;
  background: #0f1a26;
}
.app-card img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.86;
  transition: transform 0.6s var(--ease), opacity 0.4s;
}
.app-card::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(8, 16, 26, 0) 30%, rgba(8, 16, 26, 0.88) 100%);
}
.app-card .app-body {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 24px;
  z-index: 1;
  color: #fff;
}
.app-card h3 { font-size: 16.5px; font-weight: 600; margin-bottom: 6px; }
.app-card p { font-size: 12.5px; color: rgba(255, 255, 255, 0.66); line-height: 1.7; }
.app-card:hover img { transform: scale(1.06); opacity: 1; }

/* ---------- 工艺流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 1px solid rgba(255, 255, 255, 0.22); }
.step { padding: 30px 24px 0 0; position: relative; }
.step::before {
  content: "";
  position: absolute;
  top: -4px; left: 0;
  width: 7px; height: 7px;
  background: var(--brass);
}
.step .n {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--brass);
  font-weight: 600;
  margin-bottom: 14px;
}
.step h3 { font-size: 15.5px; font-weight: 600; color: #fff; margin-bottom: 8px; }
.step p { font-size: 13px; color: rgba(255, 255, 255, 0.56); line-height: 1.75; }

/* ---------- 图文分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split-media { position: relative; }
.split-text h2 { font-size: clamp(24px, 2.6vw, 34px); font-weight: 600; line-height: 1.3; margin-bottom: 20px; }
.split-text p { color: var(--muted); font-size: 15px; margin-bottom: 16px; line-height: 1.85; }
.split-text .bullets { margin-top: 24px; }

/* ---------- CTA ---------- */
.cta-band {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding: 96px 0;
  overflow: hidden;
}
.cta-band .bg { position: absolute; inset: 0; }
.cta-band .bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.42; object-position: center 42%; filter: grayscale(0.72) brightness(0.78) contrast(1.05); }
.cta-band .bg::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(94deg, rgba(8, 16, 26, 0.95) 0%, rgba(8, 16, 26, 0.7) 100%);
}
.cta-band .wrap {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(24px, 2.8vw, 36px); font-weight: 600; letter-spacing: -0.012em; margin-bottom: 12px; }
.cta-band p { color: rgba(255, 255, 255, 0.62); font-size: 15px; max-width: 560px; line-height: 1.85; }

/* ---------- 内页页头 ---------- */
.page-head {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding: 104px 0 88px;
  overflow: hidden;
}
.page-head .bg { position: absolute; inset: 0; }
.page-head .bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.4; }
.page-head .bg::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(96deg, rgba(8, 16, 26, 0.94) 0%, rgba(8, 16, 26, 0.6) 100%);
}
.page-head .wrap { position: relative; z-index: 1; }
.page-head .eyebrow { margin-bottom: 16px; }
.page-head h1 { font-size: clamp(28px, 3.6vw, 46px); font-weight: 600; letter-spacing: -0.012em; margin-bottom: 16px; }
.page-head p { color: rgba(255, 255, 255, 0.66); max-width: 660px; font-size: 15.5px; line-height: 1.85; }

.breadcrumb { font-size: 12px; color: rgba(255, 255, 255, 0.45); margin-bottom: 22px; letter-spacing: 0.06em; }
.breadcrumb a:hover { color: var(--brass); }

/* ---------- 筛选 ---------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 44px; }
.filters button {
  background: transparent;
  border: 1px solid var(--line);
  padding: 10px 20px;
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  color: #4a4d50;
  border-radius: var(--radius);
  transition: all 0.2s var(--ease);
}
.filters button.on, .filters button:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

/* ---------- 参数表 ---------- */
table.spec { width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 8px; }
table.spec th, table.spec td { border-bottom: 1px solid var(--line); padding: 13px 14px; text-align: left; vertical-align: top; }
table.spec th {
  background: transparent;
  font-weight: 600;
  font-size: 13px;
  color: var(--muted);
  width: 34%;
  letter-spacing: 0.02em;
}
table.spec tr:first-child th, table.spec tr:first-child td { border-top: 1px solid var(--line); }

/* ---------- 产品详情 ---------- */
.pd { display: grid; grid-template-columns: 1.08fr 1fr; gap: 64px; align-items: start; }
.pd h1 { font-size: clamp(26px, 3vw, 38px); font-weight: 600; letter-spacing: -0.012em; margin-bottom: 18px; line-height: 1.28; }
.pd .lead { color: var(--muted); font-size: 15.5px; margin-bottom: 30px; line-height: 1.85; }
.pd .kicker {
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--brass-2); font-weight: 600; margin-bottom: 14px;
}
.thumb-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 10px; }

.bullets li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  color: #3a3d40;
  margin-bottom: 11px;
  line-height: 1.8;
}
.bullets li::before {
  content: "";
  position: absolute;
  left: 0; top: 11px;
  width: 7px; height: 1px;
  background: var(--brass);
}

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label {
  font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.field input, .field select, .field textarea {
  border: 1px solid #d8d3c8;
  padding: 13px 15px;
  font-size: 14.5px;
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--brass);
  box-shadow: 0 0 0 3px var(--brass-soft);
}
.field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 16px; line-height: 1.8; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.18fr; gap: 72px; align-items: start; }
.info-item { padding: 20px 0; border-bottom: 1px solid var(--line); }
.info-item:first-child { padding-top: 0; }
.info-item .k {
  font-size: 10.5px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--brass-2); font-weight: 600; margin-bottom: 7px;
}
.info-item .v { font-size: 15px; line-height: 1.7; }
.info-item .v a:hover { color: var(--brass-2); }

/* ---------- 时间线 ---------- */
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 8px; }
.tl-item { padding: 28px 26px 0 0; border-top: 1px solid var(--line); position: relative; }
.tl-item::before {
  content: ""; position: absolute; top: -3.5px; left: 0;
  width: 7px; height: 7px; background: var(--brass); border-radius: 50%;
}
.tl-item strong { display: block; font-size: 22px; font-weight: 300; letter-spacing: -0.01em; color: var(--ink); margin-bottom: 8px; }
.tl-item p { font-size: 13.5px; color: var(--muted); line-height: 1.8; }

/* ---------- 页脚 ---------- */
footer.site {
  background: #070f19;
  color: rgba(255, 255, 255, 0.5);
  padding: 80px 0 0;
  font-size: 13.5px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 56px;
}
footer.site h4 {
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 600;
}
footer.site li { margin-bottom: 10px; }
footer.site a:hover { color: var(--brass); }
.foot-about p { line-height: 1.85; margin-bottom: 16px; }
.foot-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  padding: 24px 0;
  font-size: 12.5px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.34);
}

/* ---------- WhatsApp ---------- */
.wa-float {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--brass);
  border: 1px solid rgba(192, 149, 92, 0.65);
  color: #17120a;
  display: grid; place-items: center;
  font-size: 22px;
  z-index: 80;
  transition: background 0.2s, transform 0.2s;
}
.wa-float:hover { background: var(--brass-2); color: #17120a; transform: translateY(-2px); }

/* ---------- 真实产品图 ---------- */
.ph--img { background: #fff; padding: 0; overflow: hidden; border: 0; }
.ph--img::after { content: none; }
.ph--img img {
  position: absolute;
  top: 12px; left: 12px;
  width: calc(100% - 24px);
  height: calc(100% - 24px);
  object-fit: contain;
  object-position: center;
  transition: transform 0.55s var(--ease);
}
.prod-card:hover .ph--img img,
.cat-card:hover .ph--img img { transform: scale(1.04); }
.ph--img.ph--cover img { top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }

/* ---------- 响应式 ---------- */
@media (max-width: 1040px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .stats .wrap { grid-template-columns: repeat(3, 1fr); row-gap: 32px; }
  .stat:nth-child(3n) { border-right: 0; }
  .pd, .contact-grid, .split { grid-template-columns: 1fr; gap: 40px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .timeline { grid-template-columns: repeat(2, 1fr); row-gap: 32px; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 36px; }
  section { padding: 80px 0; }
}
@media (max-width: 760px) {
  body { font-size: 15px; }
  nav.main { display: none; }
  nav.main.open {
    display: flex;
    position: absolute;
    top: 82px; left: 0; right: 0;
    background: var(--paper);
    flex-direction: column;
    gap: 0;
    padding: 8px 28px 24px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -28px rgba(10, 20, 31, 0.5);
  }
  nav.main.open a { padding: 14px 0; border-bottom: 1px solid var(--line); width: 100%; }
  .menu-toggle { display: block; }
  header.site .wrap { height: 72px; }
  header.site .wrap > .btn { display: none; }
  .logo-img { height: 44px; }
  .logo-text { padding-left: 10px; }
  .logo-text strong { font-size: 16px; }
  .logo-text span { font-size: 8px; letter-spacing: 0.18em; }
  .grid-4, .grid-3, .grid-2, .features, .form-grid, .app-grid, .steps { grid-template-columns: 1fr; }
  .stats .wrap { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: 0; }
  section { padding: 64px 0; }
  .hero .wrap { padding-top: 84px; padding-bottom: 72px; }
  .hero p.lead { font-size: 15.5px; }
  .topbar-left { display: none; }
  .cta-band { padding: 64px 0; }
  .foot-grid { grid-template-columns: 1fr; gap: 36px; }
  .wrap { padding: 0 20px; }
}

/* ---------- 中文排版 ---------- */
html[lang="zh-CN"] p, html[lang="zh-CN"] li { line-height: 1.88; }
html[lang="zh-CN"] h1 { letter-spacing: 0; line-height: 1.26; }
html[lang="zh-CN"] h2 { letter-spacing: 0; line-height: 1.38; }
html[lang="zh-CN"] h3 { letter-spacing: 0; line-height: 1.5; }
html[lang="zh-CN"] .hero h1 { line-height: 1.24; }
html[lang="zh-CN"] .eyebrow { letter-spacing: 0.22em; }
html[lang="zh-CN"] .btn { letter-spacing: 0.06em; }

/* ---------- 通栏分类卡（整线工程） ---------- */
.cat-card--wide {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: stretch;
  flex-direction: row;
}
.cat-card--wide > .ph {
  height: 100%;
  min-height: 360px;
  aspect-ratio: 16 / 10;
}
.cat-card--wide .body { justify-content: center; padding: 52px 56px; }
.cat-card--wide .eyebrow { margin-bottom: 14px; }
.cat-card--wide h3 { font-size: clamp(20px, 2.2vw, 28px); margin-bottom: 16px; line-height: 1.35; }
.cat-card--wide p { font-size: 14.5px; max-width: 480px; }
.cat-card--wide .more { margin-top: 24px; }

@media (max-width: 1040px) {
  .cat-card--wide { grid-template-columns: 1fr; }
  .cat-card--wide > .ph { min-height: 260px; }
  .cat-card--wide .body { padding: 32px 28px 36px; }
}

/* ---------- 地图卡 ---------- */
.map-card {
  margin-top: 64px;
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
}
.map-line {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 26px;
  border-bottom: 1px solid var(--line-2);
  flex-wrap: wrap;
}
.map-pin {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--brass-soft);
  color: var(--brass-2);
  font-size: 16px;
}
.map-line strong { display: block; font-size: 15px; font-weight: 600; margin-bottom: 3px; }
.map-line span.map-addr, .map-line div span { font-size: 13px; color: var(--muted); }
.map-link {
  margin-left: auto;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--brass-2);
}
.map-link:hover { color: var(--ink); }
.ph--map {
  aspect-ratio: auto;
  height: 380px;
  border: 0;
  background-color: #f2efe7;
  background-image:
    linear-gradient(rgba(10, 20, 31, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 20, 31, 0.045) 1px, transparent 1px);
  background-size: 46px 46px;
  color: #a29c8d;
  font-size: 11.5px;
  letter-spacing: 0.16em;
}
@media (max-width: 760px) {
  .ph--map { height: 260px; }
  .map-link { margin-left: 0; width: 100%; padding-top: 6px; }
}

/* 地址的中文行下面挂一行罗马字，海外客户照着能查地图 */
.addr-en { display: block; font-size: 11px; letter-spacing: .02em; opacity: .62; margin-top: 2px; }

/* ---------- 产品分页器（v3） ---------- */
.pager{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin:56px 0 8px;flex-wrap:wrap
}
.pager .pg{
  min-width:42px;height:42px;padding:0 12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font:inherit;font-size:14px;line-height:40px;
  border-radius:var(--radius);cursor:pointer;transition:background .15s,border-color .15s,color .15s
}
.pager .pg:hover:not(:disabled){border-color:var(--brass);color:var(--brass-2)}
.pager .pg.on{background:var(--ink);border-color:var(--ink);color:#fff}
.pager .pg:disabled{opacity:.35;cursor:default}
.pager .pg--nav{font-size:16px}
.pager .pg-dots{color:var(--muted);padding:0 2px;user-select:none}
.grid-count{color:var(--muted);font-size:13px;letter-spacing:.02em}

/* ---------- P1/P2 新增：首屏承诺条 / 交期条 / FAQ ---------- */
.hero-note{
  margin-top:20px;font-size:13.5px;letter-spacing:.02em;
  color:rgba(255,255,255,.70)
}
.strip{
  margin:0 0 22px;padding:12px 18px;border:1px solid var(--line);
  background:#fff;border-radius:var(--radius);
  font-size:13.5px;color:var(--muted);letter-spacing:.02em
}
.faq{margin-top:8px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{
  cursor:pointer;list-style:none;font-size:16.5px;font-weight:600;color:var(--ink);
  display:flex;justify-content:space-between;align-items:center;gap:16px
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brass);font-size:20px;font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin:12px 0 0;color:var(--muted);font-size:14.5px;line-height:1.85;max-width:860px}