/* ==========================================================================
   广东冰能科技有限公司 官网样式表
   风格：明亮白底 + 冰蓝点缀（编辑式排版 / 大留白 / 清晰列表）
   参考气质：islandea.cn（白底黑字灰细线，信息克制，靠图与排版说话）
   ========================================================================== */

:root {
  /* 底色层次：纯白为主，浅灰做分区 */
  --bg:          #ffffff;
  --bg-soft:     #fafafa;
  --bg-tint:     #f4f8fa;

  /* 文字层次：近黑 → 中灰 → 浅灰 */
  --ink:         #111111;
  --ink-2:       #555555;
  --ink-3:       #8c8c8c;
  --ink-4:       #b5b5b5;

  /* 线条：极细浅灰，不用阴影堆叠 */
  --line:        #ececec;
  --line-2:      #e0e0e0;

  /* 冰蓝强调色 */
  --accent:      #0ea5e9;
  --accent-dk:   #0284c7;
  --accent-soft: #e8f5fc;

  --radius:      4px;
  --radius-sm:   2px;
  --max:         1240px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
::selection { background: var(--accent-soft); color: var(--accent-dk); }

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 78px;
}
.brand { display: flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 700; letter-spacing: .3px; color: var(--ink); }
.brand .mark {
  width: 38px; height: 38px; border-radius: 3px;
  background: var(--ink);
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 17px;
  letter-spacing: 0;
}
.brand .en {
  display: block; line-height: 1.2;
  color: var(--ink-3); font-size: 10px; font-weight: 500;
  letter-spacing: 2.4px; text-transform: uppercase;
}

.nav-menu { display: flex; align-items: center; gap: 2px; }
.nav-menu > li { position: relative; }
.nav-menu > li > a {
  display: block; padding: 26px 15px; font-size: 15px; color: var(--ink-2);
  transition: color .18s; position: relative;
}
.nav-menu > li > a::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 18px;
  height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .22s;
}
.nav-menu > li > a:hover { color: var(--ink); }
.nav-menu > li > a:hover::after,
.nav-menu > li > a.active::after { transform: scaleX(1); }
.nav-menu > li > a.active { color: var(--ink); font-weight: 600; }

.dropdown {
  position: absolute; top: 100%; left: 0; min-width: 232px;
  background: #fff; border: 1px solid var(--line);
  padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: .2s; box-shadow: 0 16px 36px rgba(0,0,0,.08);
}
.nav-menu > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: 10px 14px; font-size: 14px; color: var(--ink-2);
  transition: .16s;
}
.dropdown a:hover { color: var(--accent-dk); background: var(--bg-soft); }

.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-switch { display: flex; gap: 2px; font-size: 13px; }
.lang-switch a { padding: 6px 10px; color: var(--ink-3); letter-spacing: .5px; }
.lang-switch a.on { color: var(--ink); font-weight: 600; border-bottom: 1px solid var(--ink); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .2s; white-space: nowrap;
  font-family: inherit; line-height: 1.2;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dk); }
.btn-ghost { border-color: var(--line-2); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #000; }
.btn-sm { padding: 9px 18px; font-size: 14px; }

.menu-toggle { display: none; background: none; border: 1px solid var(--line-2); padding: 8px 10px; cursor: pointer; }
.menu-toggle span { display: block; width: 20px; height: 2px; background: var(--ink); margin: 4px 0; transition: .2s; }

/* ---------- 首屏（左文右图） ---------- */
.hero { padding: 92px 0 80px; border-bottom: 1px solid var(--line); background: var(--bg); }
.hero-grid { display: none; }
.hero-split {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: 2.4px; text-transform: uppercase;
  color: var(--accent-dk); margin-bottom: 24px; font-weight: 600;
}
.hero-tag::before { content: ""; width: 26px; height: 1px; background: var(--accent); }
.hero h1 {
  font-size: 54px; line-height: 1.22; font-weight: 700;
  letter-spacing: -1.6px; margin-bottom: 24px; color: var(--ink);
}
.hero h1 .glow { color: var(--accent); }
.hero p.lead {
  font-size: 17px; color: var(--ink-2); max-width: 560px; margin-bottom: 36px; line-height: 1.85;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 52px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); padding-top: 26px; gap: 16px;
}
.hero-stats .stat { }
.hero-stats .num {
  font-size: 28px; font-weight: 700; color: var(--ink); letter-spacing: -.8px;
  line-height: 1.2; font-variant-numeric: tabular-nums;
}
.hero-stats .num em { font-style: normal; color: var(--accent); }
.hero-stats .lbl { font-size: 12.5px; color: var(--ink-3); margin-top: 4px; letter-spacing: .3px; }

/* 首屏大图位（未放图时的占位视觉） */
.hero-visual {
  position: relative; aspect-ratio: 4 / 4.4; overflow: hidden;
  background:
    radial-gradient(120% 80% at 20% 0%, #eaf6fc 0%, #f7fafc 46%, #eef3f6 100%);
  border: 1px solid var(--line);
}
.hero-visual::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(17,17,17,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17,17,17,.035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 20%, transparent 80%);
}
.hero-visual .visor {
  position: absolute; inset: 0; display: grid; place-items: center; z-index: 2;
}
.hero-visual .visor .ring {
  width: 58%; aspect-ratio: 1; border-radius: 50%;
  border: 1px dashed rgba(14,165,233,.45);
  display: grid; place-items: center;
}
.hero-visual .visor .ring .core {
  width: 62%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #ffffff, #dff1fb 58%, #c7e6f7);
  display: grid; place-items: center;
  color: var(--accent-dk); font-size: 13px; letter-spacing: 3px; font-weight: 600;
  box-shadow: 0 20px 50px rgba(14,165,233,.14);
}
.hero-visual .cap {
  position: absolute; left: 18px; bottom: 16px; z-index: 3;
  font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--ink-4);
}

/* ---------- 首屏（全屏主视觉 · 制造实力） ---------- */
.hero-full {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: calc(100dvh - 78px);
  display: flex; align-items: flex-end;
  background: #0b1220;                 /* 图未上传时的兜底底色 */
  border-bottom: 1px solid var(--line);
}
.hero-full-img {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%;
  object-fit: cover; object-position: center 42%;
}
.hero-full::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(0,0,0,.80) 0%, rgba(0,0,0,.52) 44%, rgba(0,0,0,.20) 76%, rgba(0,0,0,.06) 100%),
    linear-gradient(0deg, rgba(0,0,0,.58) 0%, rgba(0,0,0,0) 48%);
}
.hero-full-inner {
  width: 100%; color: #fff;
  padding-top: 128px; padding-bottom: 80px;
}
.hero-full .hero-tag { color: #9fe8ff; margin-bottom: 22px; }
.hero-full .hero-tag::before { background: #22e0ff; }
.hero-full h1 {
  font-size: clamp(34px, 5.1vw, 64px); line-height: 1.18; font-weight: 700;
  letter-spacing: -1.8px; margin-bottom: 22px; color: #fff;
  text-shadow: 0 2px 26px rgba(0,0,0,.32);
}
.hero-full h1 .glow { color: #5fe3ff; }
.hero-full p.lead {
  font-size: clamp(15px, 1.2vw, 18px); line-height: 1.85;
  color: rgba(255,255,255,.84); max-width: 620px; margin-bottom: 34px;
}
.hero-full .hero-actions { margin-bottom: 44px; }
.hero-full .btn-ghost {
  border-color: rgba(255,255,255,.55); color: #fff;
  background: rgba(255,255,255,.06);
}
.hero-full .btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.15); }

.hero-caps { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-caps span {
  font-size: 12.5px; letter-spacing: 1.3px;
  color: rgba(255,255,255,.88);
  border: 1px solid rgba(255,255,255,.26);
  border-radius: 2px; padding: 7px 14px;
}

/* 图位提示：只在图片缺失时出现，放上真图自动消失 */
.hero-ph { display: none; }
.hero-full.is-noimg { background: #0b1220; }
.hero-full.is-noimg::after {
  background:
    linear-gradient(90deg, rgba(0,0,0,.55) 0%, rgba(0,0,0,.22) 60%, rgba(0,0,0,0) 100%),
    linear-gradient(0deg, rgba(0,0,0,.45) 0%, rgba(0,0,0,0) 60%);
}
.hero-full.is-noimg::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(120,180,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,255,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-full.is-noimg .hero-ph {
  display: block; position: absolute; right: 28px; top: 28px; z-index: 2;
  font-size: 11.5px; letter-spacing: .6px; color: rgba(255,255,255,.5);
  border: 1px dashed rgba(255,255,255,.22); border-radius: 3px; padding: 6px 12px;
}

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section.tight { padding: 64px 0; }
.sec-head { margin-bottom: 48px; }
.sec-head .kicker {
  font-size: 11.5px; letter-spacing: 3.2px; color: var(--accent);
  text-transform: uppercase; margin-bottom: 14px; font-weight: 600;
}
.sec-head h2 {
  font-size: 34px; font-weight: 700; letter-spacing: -1px; margin-bottom: 14px; color: var(--ink);
  line-height: 1.35;
}
.sec-head p { color: var(--ink-2); font-size: 16px; max-width: 640px; }
.sec-head.center { text-align: center; }
.sec-head.center p { margin: 0 auto; }
.sec-head.center h2 { margin-left: auto; margin-right: auto; }

/* 标题行：左标题 + 右链接 */
.head-row {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; margin-bottom: 44px; padding-bottom: 22px; border-bottom: 1px solid var(--line);
}
.head-row .sec-head { margin-bottom: 0; }
.head-row .link-more {
  font-size: 14px; font-weight: 600; color: var(--ink); white-space: nowrap;
  display: inline-flex; align-items: center; gap: 8px;
}
.head-row .link-more::after { content: "→"; color: var(--accent); transition: .2s; }
.head-row .link-more:hover::after { transform: translateX(4px); }

/* ---------- 网格 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }

/* ---------- 产品线大卡（首页四大类） ---------- */
.line-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.line-card {
  background: #fff; padding: 34px 28px 30px; transition: .22s; display: block; position: relative;
}
.line-card:hover { background: var(--bg-tint); }
.line-card .no { font-size: 12px; color: var(--ink-4); letter-spacing: 1.5px; margin-bottom: 22px; display: block; }
.line-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; letter-spacing: -.3px; }
.line-card .en { font-size: 12px; letter-spacing: 1.6px; text-transform: uppercase; color: var(--accent-dk); margin-bottom: 14px; display: block; }
.line-card .desc { font-size: 14px; color: var(--ink-2); line-height: 1.8; }
.line-card .go {
  margin-top: 20px; font-size: 13px; font-weight: 600; color: var(--ink);
  display: inline-flex; align-items: center; gap: 6px;
}
.line-card .go::after { content: "→"; color: var(--accent); transition: .2s; }
.line-card:hover .go::after { transform: translateX(4px); }

/* ---------- 产品卡片（图 + 型号 + 参数 + 卖点） ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.prod-card {
  background: #fff; border: 1px solid var(--line); overflow: hidden;
  display: flex; flex-direction: column; transition: .22s;
}
.prod-card:hover { border-color: var(--accent); box-shadow: 0 14px 34px rgba(14,165,233,.1); transform: translateY(-3px); }

.prod-media {
  position: relative; aspect-ratio: 4 / 3; background: var(--bg-soft);
  border-bottom: 1px solid var(--line); display: grid; place-items: center; overflow: hidden;
}
.prod-media img { width: 100%; height: 100%; object-fit: cover; }
.prod-media .ph {
  font-size: 30px; font-weight: 700; color: #d8dde1; letter-spacing: 1px;
}
.prod-media .flag {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  font-size: 11px; font-weight: 700; letter-spacing: .6px;
  padding: 4px 9px; background: var(--accent); color: #fff;
}
.prod-media .flag.gray { background: var(--ink); }
.prod-media .flag.light { background: #fff; color: var(--accent-dk); border: 1px solid var(--accent); }

.prod-body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.prod-model {
  font-size: 20px; line-height: 1.3; font-weight: 800; letter-spacing: .2px;
  color: var(--ink); margin-bottom: 14px;
}
.prod-body h3 { font-size: 18px; font-weight: 700; line-height: 1.45; margin-bottom: 14px; letter-spacing: -.2px; }

.prod-specs { border-top: 1px solid var(--line); padding-top: 14px; margin-bottom: 16px; }
.prod-specs dl { display: grid; grid-template-columns: 48px 1fr; gap: 8px 12px; font-size: 13.5px; }
.prod-specs dt { color: var(--ink-3); }
.prod-specs dd { color: var(--ink); font-weight: 500; }

.prod-desc { font-size: 14px; color: var(--ink-2); line-height: 1.8; flex: 1; margin-bottom: 18px; }
.prod-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; }

/* 系列下没有在售型号时的占位 */
.prod-empty {
  grid-column: 1 / -1; padding: 26px 24px; border: 1px dashed var(--line);
  color: var(--ink-3); font-size: 14px; background: var(--bg-soft);
}
.prod-empty a { color: var(--accent-dk); text-decoration: underline; }
.prod-foot .more { font-size: 13.5px; font-weight: 600; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; }
.prod-foot .more::after { content: "→"; color: var(--accent); transition: .2s; }
.prod-card:hover .prod-foot .more::after { transform: translateX(4px); }
.prod-foot .q { font-size: 12.5px; color: var(--accent-dk); font-weight: 600; }

/* ---------- 通用卡片（其他页面沿用） ---------- */
.card {
  background: #fff; border: 1px solid var(--line);
  overflow: hidden; transition: .22s; display: flex; flex-direction: column;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 14px 34px rgba(14,165,233,.09); }
.card .thumb {
  position: relative; aspect-ratio: 4 / 3;
  background: var(--bg-soft); display: grid; place-items: center;
  border-bottom: 1px solid var(--line);
}
.card .thumb .ph { font-size: 30px; font-weight: 700; color: #d8dde1; letter-spacing: 1px; }
.card .badge {
  position: absolute; top: 12px; left: 12px;
  font-size: 11px; font-weight: 700; letter-spacing: .6px;
  padding: 4px 9px; background: var(--accent); color: #fff;
}
.card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.45; }
.card .spec { font-size: 12px; color: var(--accent-dk); letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 12px; font-weight: 600; }
.card .desc { font-size: 14px; color: var(--ink-2); flex: 1; margin-bottom: 18px; line-height: 1.8; }
.card .more { font-size: 13.5px; font-weight: 600; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; }
.card .more::after { content: "→"; color: var(--accent); transition: .2s; }
.card:hover .more::after { transform: translateX(4px); }

/* ---------- 分类标签 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 10px 18px; font-size: 14px;
  background: #fff; border: 1px solid var(--line-2); color: var(--ink-2);
  transition: .18s; cursor: pointer; border-radius: var(--radius-sm);
}
.chip:hover { border-color: var(--accent); color: var(--accent-dk); background: var(--accent-soft); }

/* ---------- 优势 / 特性 ---------- */
.feature { background: #fff; border: 1px solid var(--line); padding: 32px 26px; transition: .2s; }
.feature:hover { border-color: var(--line-2); }
.feature .ico {
  width: 44px; height: 44px; margin-bottom: 20px;
  display: grid; place-items: center; font-size: 20px;
  background: var(--accent-soft); color: var(--accent-dk); border-radius: 2px;
}
.feature h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 10px; letter-spacing: -.2px; }
.feature p { font-size: 14px; color: var(--ink-2); line-height: 1.8; }

/* 数字条（工厂实力） */
.stat-bar { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat-bar .item { padding: 30px 24px; border-right: 1px solid var(--line); }
.stat-bar .item:last-child { border-right: none; }
.stat-bar .n { font-size: 30px; font-weight: 700; letter-spacing: -1px; font-variant-numeric: tabular-nums; }
.stat-bar .n em { font-style: normal; color: var(--accent); font-size: 20px; margin-left: 2px; }
.stat-bar .t { font-size: 13px; color: var(--ink-3); margin-top: 4px; }

/* ---------- 内页头 ---------- */
.page-head { padding: 72px 0 48px; border-bottom: 1px solid var(--line); background: var(--bg); }
.page-head h1 { font-size: 42px; font-weight: 700; letter-spacing: -1.4px; margin-bottom: 14px; line-height: 1.25; }
.page-head p { color: var(--ink-2); max-width: 660px; font-size: 16px; }
.crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 18px; }
.crumb a:hover { color: var(--accent-dk); }

/* ---------- 侧栏布局 ---------- */
.with-side { display: grid; grid-template-columns: 236px 1fr; gap: 56px; align-items: start; }
.side-nav { border: 1px solid var(--line); padding: 8px; position: sticky; top: 100px; background: #fff; }
.side-nav h4 { font-size: 11px; letter-spacing: 2.4px; color: var(--ink-3); padding: 14px 14px 10px; text-transform: uppercase; }
.side-nav a {
  display: block; padding: 11px 14px; font-size: 14px; color: var(--ink-2);
  border-left: 2px solid transparent; transition: .16s;
}
.side-nav a:hover { color: var(--ink); background: var(--bg-soft); }
.side-nav a.on { color: var(--accent-dk); border-left-color: var(--accent); background: var(--accent-soft); font-weight: 600; }

/* ---------- 联系 / 表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.info-item { display: flex; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.info-item:first-child { border-top: 1px solid var(--line); }
.info-item .ico {
  width: 40px; height: 40px; flex: none; display: grid; place-items: center; font-size: 17px;
  background: var(--accent-soft); color: var(--accent-dk); border-radius: 2px;
}
.info-item .k { font-size: 12.5px; color: var(--ink-3); margin-bottom: 3px; letter-spacing: .3px; }
.info-item .v { font-size: 16px; font-weight: 600; color: var(--ink); }
.info-item .v a:hover { color: var(--accent-dk); }

.form-card { background: var(--bg-soft); border: 1px solid var(--line); padding: 36px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 8px; font-weight: 500; }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 15px; font-size: 15px; font-family: inherit;
  background: #fff; border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  color: var(--ink); transition: .18s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-4); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(14,165,233,.12);
}
.field textarea { resize: vertical; min-height: 118px; }
.field input.err, .field textarea.err { border-color: #e11d48; }
.form-tip { margin-top: 14px; font-size: 13.5px; display: none; }
.form-tip.ok { display: block; color: #0f766e; }
.form-tip.bad { display: block; color: #be123c; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 72px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.3fr; gap: 44px; margin-bottom: 52px; }
.foot-grid h4 {
  font-size: 11.5px; font-weight: 600; margin-bottom: 20px; color: var(--ink-3);
  letter-spacing: 2.2px; text-transform: uppercase;
}
.foot-grid ul li { margin-bottom: 12px; }
.foot-grid ul a { font-size: 14px; color: var(--ink-2); transition: .16s; }
.foot-grid ul a:hover { color: var(--accent-dk); }
.foot-about p { font-size: 14px; color: var(--ink-2); margin-top: 18px; max-width: 320px; line-height: 1.85; }
.foot-bottom {
  border-top: 1px solid var(--line); padding-top: 24px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--ink-3); letter-spacing: .3px;
}
.foot-bottom a:hover { color: var(--accent-dk); }

/* ---------- 工具类 ---------- */
.mt-40 { margin-top: 40px; }
.mt-24 { margin-top: 24px; }
.text-c { text-align: center; }
.glow-line { display: none; }
.muted { color: var(--ink-3); }
.divider { height: 1px; background: var(--line); border: none; margin: 0; }
.band { background: var(--ink); color: #fff; padding: 64px 0; }
.band h2 { font-size: 30px; font-weight: 700; letter-spacing: -.8px; margin-bottom: 12px; }
.band p { color: rgba(255,255,255,.72); max-width: 560px; }
.band .btn-primary { background: var(--accent); }
.band .btn-ghost { border-color: rgba(255,255,255,.4); color: #fff; }
.band .btn-ghost:hover { border-color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid-4, .line-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .with-side { grid-template-columns: 1fr; gap: 36px; }
  .side-nav { position: static; }
  .hero h1 { font-size: 42px; }
  .hero-split { gap: 44px; }
  .hero-visual { aspect-ratio: 4 / 3.6; }
  .stat-bar { grid-template-columns: repeat(2, 1fr); }
  .stat-bar .item:nth-child(2) { border-right: none; }
}

@media (max-width: 760px) {
  .wrap { padding: 0 20px; }
  .menu-toggle { display: block; }
  .nav-menu {
    position: fixed; left: 0; right: 0; top: 78px; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 10px 20px 22px; gap: 0; display: none; max-height: calc(100dvh - 78px); overflow-y: auto;
  }
  .nav-menu.open { display: flex; }
  .nav-menu > li > a { padding: 14px 4px; }
  .nav-menu > li > a::after { display: none; }
  .dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; background: var(--bg-soft); padding: 6px 0 6px 12px; margin-bottom: 6px;
  }
  .nav-right .lang-switch { display: none; }
  .hero { padding: 48px 0 52px; }
  .hero-split { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; letter-spacing: -1px; }
  .hero p.lead { font-size: 15.5px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 18px 12px; }
  .hero-visual { aspect-ratio: 4 / 3; }
  .hero-full { min-height: calc(100dvh - 78px); }
  .hero-full-img { object-position: 58% center; }
  .hero-full::after {
    background:
      linear-gradient(0deg, rgba(0,0,0,.90) 0%, rgba(0,0,0,.55) 52%, rgba(0,0,0,.16) 100%);
  }
  .hero-full-inner { padding-top: 92px; padding-bottom: 52px; }
  .hero-full h1 { letter-spacing: -1px; }
  .hero-caps { gap: 8px; }
  .hero-caps span { font-size: 11.5px; letter-spacing: 1px; padding: 6px 10px; }
  .section { padding: 60px 0; }
  .sec-head { margin-bottom: 34px; }
  .sec-head h2 { font-size: 25px; }
  .grid-2, .grid-3, .grid-4, .prod-grid, .line-grid, .contact-grid, .foot-grid { grid-template-columns: 1fr; }
  .line-grid { gap: 0; }
  .line-card { border-bottom: 1px solid var(--line); }
  .page-head { padding: 44px 0 34px; }
  .page-head h1 { font-size: 29px; }
  .head-row { flex-direction: column; align-items: flex-start; gap: 12px; }
  .form-card { padding: 24px 20px; }
  .stat-bar .item { padding: 22px 18px; }
  .band { padding: 44px 0; }
  .band h2 { font-size: 24px; }
}

/* 后台传了 LOGO 图片时，用它替代方块字（没传就还是方块字） */
.brand-logo { height: 40px; width: auto; max-width: 168px; display: block; object-fit: contain; }
.site-footer .brand-logo { height: 36px; max-width: 150px; }
@media (max-width: 640px) {
  .brand-logo { height: 34px; max-width: 140px; }
}