/* =========================================================
   常州嘉唐机械科技有限公司 官网样式 v2
   jatnn.com  |  精密工业风 · 深墨蓝 + 琥珀铜金
   设计原则：大留白 / 强层级 / 克制的装饰 / 统一图片比例
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  /* 主色：深工业蓝（沉稳、可信） */
  --brand: #10457f;
  --brand-2: #0b2e5a;
  --brand-3: #1a5ca8;
  --brand-tint: #eef4fb;

  /* 点睛色：琥珀铜金（替代高饱和橙） */
  --accent: #c8721e;
  --accent-2: #a85c12;
  --accent-light: #f0b264;
  --accent-tint: #fdf6ee;

  /* 中性色阶 */
  --ink: #0f1a26;
  --ink-2: #56637a;
  --ink-3: #8b95a7;
  --line: #e3e8ef;
  --line-2: #eef1f6;

  --bg: #ffffff;
  --bg-soft: #f7f9fb;
  --bg-deep: #091420;
  --bg-deep-2: #0e2136;

  /* 圆角与阴影：硬朗克制 */
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-xs: 0 1px 2px rgba(9, 20, 32, .05);
  --shadow-sm: 0 4px 14px rgba(9, 20, 32, .06);
  --shadow: 0 14px 36px rgba(9, 20, 32, .10);
  --shadow-lg: 0 30px 70px rgba(9, 20, 32, .20);

  --container: 1200px;
  --header-h: 72px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, system-ui, -apple-system, sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
/* 抽屉导航用 translateX(100%) 停在视口外，clip 可阻止它撑出横向滚动条，
   且不会像 overflow:hidden 那样建立滚动容器、破坏 sticky 页头 */
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 {
  margin: 0 0 .55em; line-height: 1.24; font-weight: 700;
  letter-spacing: -.018em; color: var(--ink);
}
p { margin: 0 0 1em; }
button { font-family: inherit; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 通用容器与排版 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* 版块：大留白拉开节奏 */
.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 72px 0; }
.section--flush { padding-bottom: 0; }

.section-head { max-width: 720px; margin: 0 0 52px; text-align: left; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 {
  font-size: clamp(25px, 3.1vw, 38px);
  font-weight: 800; letter-spacing: -.028em; line-height: 1.2;
  margin-bottom: .5em;
}
.section-head h2 span { color: var(--brand); }
.section-head p { color: var(--ink-2); margin: 0; font-size: 16.5px; }

/* 小标签：短横线 + 字距，取代居中三段式 */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 24px; height: 1px; background: currentColor; opacity: .55; }
.section-head--center .eyebrow { justify-content: center; }
.section-head--center .eyebrow::before { display: none; }

.lead { font-size: 17.5px; color: var(--ink-2); }
.center { text-align: center; }
.muted { color: var(--ink-3); }

/* 版块头部右侧的"了解更多" */
.head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.head-row .section-head { margin-bottom: 0; }
.head-row + * { margin-top: 52px; }

/* 栅格子项默认为 min-width:auto，长内容会把格子撑破容器——
   统一放开收缩，避免窄屏出现横向溢出 */
.grid > *, .split > *, .layout > *, .prod-hero > * { min-width: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius); font-weight: 600; font-size: 15px;
  border: 1px solid transparent; transition: all .22s cubic-bezier(.2,.7,.3,1); white-space: nowrap;
  letter-spacing: .01em;
}
.btn--primary { background: var(--brand); color: #fff; box-shadow: 0 8px 22px rgba(16, 69, 127, .22); }
.btn--primary:hover { background: var(--brand-2); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(16, 69, 127, .28); }
.btn--accent { background: var(--accent); color: #fff; box-shadow: 0 8px 22px rgba(200, 114, 30, .26); }
.btn--accent:hover { background: var(--accent-2); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(200, 114, 30, .32); }
.btn--ghost { background: #fff; color: var(--brand); border-color: #d3e0ef; }
.btn--ghost:hover { border-color: var(--brand); background: var(--brand-tint); transform: translateY(-2px); }
.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.38); }
.btn--outline-light:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.75); }
.btn--block { width: 100%; }
.btn--lg { padding: 17px 38px; font-size: 16px; }
.btn--sm { padding: 9px 18px; font-size: 14px; }

/* 文字链接箭头 */
.link-arrow { display: inline-flex; align-items: center; gap: 6px; color: var(--brand); font-weight: 600; font-size: 15px; }
.link-arrow::after { content: "→"; transition: transform .2s ease; }
.link-arrow:hover::after { transform: translateX(4px); }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px;
}

/* ---------- 顶部信息条（收干净，不再抢戏） ---------- */
.topbar { background: var(--bg-soft); border-bottom: 1px solid var(--line-2); color: var(--ink-3); font-size: 13px; }
.topbar .container { display: flex; align-items: center; justify-content: space-between; min-height: 40px; gap: 16px; flex-wrap: wrap; }
.topbar a { color: var(--ink-2); font-weight: 500; }
.topbar a:hover { color: var(--brand); }
.topbar .sp { display: inline-flex; align-items: center; gap: 7px; }
.topbar .sp + .sp { margin-left: 22px; }
.topbar i { font-style: normal; color: var(--accent); font-weight: 700; }

/* ---------- 页头导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-2);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo img { height: 40px; width: auto; }
.logo__text { line-height: 1.15; }
.logo__text b { display: block; font-size: 17px; letter-spacing: .02em; }
.logo__text small { display: block; font-size: 11px; color: var(--ink-3); letter-spacing: .18em; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 2px; }
.nav > li { position: relative; }
.nav > li > a {
  display: block; padding: 10px 16px; font-size: 15px; font-weight: 500; color: var(--ink-2);
  border-radius: var(--radius); transition: color .2s, background .2s;
}
.nav > li > a:hover { color: var(--brand); background: var(--brand-tint); }
.nav > li.is-active > a { color: var(--brand); font-weight: 700; }
.nav > li.is-active > a::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 0; height: 2px;
  background: var(--accent); border-radius: 2px;
}
/* 二级下拉 */
.submenu {
  position: absolute; top: calc(100% + 10px); left: 0; min-width: 244px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 8px; opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .22s cubic-bezier(.2,.7,.3,1);
}
.submenu::before { content: ""; position: absolute; left: 0; right: 0; top: -12px; height: 12px; }
.nav > li:hover .submenu, .nav > li:focus-within .submenu { opacity: 1; visibility: visible; transform: none; }
.submenu a { display: block; padding: 10px 13px; border-radius: 6px; font-size: 14.5px; color: var(--ink-2); transition: all .18s; }
.submenu a:hover { background: var(--brand-tint); color: var(--brand); }

.header-cta { display: flex; align-items: center; gap: 14px; }
.header-cta .tel { font-weight: 700; color: var(--ink); font-size: 16.5px; letter-spacing: .01em; }
.header-cta .tel:hover { color: var(--brand); }

/* 汉堡按钮 */
.nav-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff;
  border-radius: var(--radius); padding: 0; align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: all .25s;
}
.nav-toggle span { position: relative; }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
body.nav-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

/* 抽屉式移动导航 */
.mnav {
  position: fixed; inset: var(--header-h) 0 0 0; background: #fff; z-index: 55;
  padding: 20px 24px 48px; overflow-y: auto; transform: translateX(100%); transition: transform .3s cubic-bezier(.2,.7,.3,1);
}
body.nav-open .mnav { transform: none; }
.mnav > li > a { display: block; padding: 15px 2px; font-size: 17px; font-weight: 600; border-bottom: 1px solid var(--line-2); }
.mnav .msub { padding: 8px 0 14px 14px; display: none; }
.mnav .msub.is-open { display: block; }
.mnav .msub a { display: block; padding: 11px 2px; font-size: 15px; color: var(--ink-2); }
.mnav__sub-toggle { background: none; border: 0; padding: 0 10px; color: var(--brand); font-size: 20px; line-height: 1; }

/* =========================================================
   首屏 Hero
   ========================================================= */
.hero {
  position: relative; overflow: hidden; color: #fff;
  padding: 116px 0 104px;
  background:
    radial-gradient(900px 420px at 88% -10%, rgba(200,114,30,.22), transparent 62%),
    radial-gradient(700px 520px at -8% 110%, rgba(26,92,168,.30), transparent 60%),
    linear-gradient(150deg, #07111c 0%, #0b2744 52%, #10457f 100%);
}
/* 精密网格纹理 */
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .10;
  background-image: linear-gradient(rgba(255,255,255,.6) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.6) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(1000px 620px at 25% 30%, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(1000px 620px at 25% 30%, #000, transparent 78%);
}
.hero .container { position: relative; z-index: 1; }
.hero__grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
.hero h1 {
  font-size: clamp(27px, 3.4vw, 43px); line-height: 1.24; letter-spacing: -.032em;
  font-weight: 800; margin-bottom: 22px; color: #fff;
}
.hero h1 em { font-style: normal; color: var(--accent-light); }
.hero__desc { font-size: 16.5px; color: #bed0e4; max-width: 560px; line-height: 1.85; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 34px 0 34px; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 0; border-top: 1px solid rgba(255,255,255,.14); padding-top: 22px; }
.hero__tags span {
  font-size: 13.5px; color: #a9bed6; padding: 0 16px; position: relative;
}
.hero__tags span:first-child { padding-left: 0; }
.hero__tags span + span::before {
  content: ""; position: absolute; left: 0; top: 50%; width: 3px; height: 3px;
  border-radius: 50%; background: var(--accent); transform: translateY(-50%);
}
.hero__visual {
  position: relative; overflow: hidden; aspect-ratio: 3 / 2;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.hero__visual img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero__visual::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(7,17,28,.45));
}
.hero__badge {
  position: absolute; z-index: 2; left: 20px; bottom: 20px;
  display: inline-flex; align-items: center; gap: 9px;
  background: rgba(255,255,255,.96); color: var(--brand-2);
  border-radius: 999px; padding: 9px 18px; font-size: 13.5px; font-weight: 700;
  box-shadow: 0 8px 24px rgba(7,17,28,.3); backdrop-filter: blur(6px);
}
.hero__badge i { width: 7px; height: 7px; border-radius: 50%; background: #12a05f; flex: 0 0 7px; }

/* =========================================================
   数据条
   ========================================================= */
.stats { background: #fff; border-bottom: 1px solid var(--line-2); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stats__item { padding: 42px 28px 42px 0; position: relative; }
.stats__item + .stats__item { padding-left: 40px; }
.stats__item + .stats__item::before {
  content: ""; position: absolute; left: 0; top: 46px; bottom: 46px; width: 1px; background: var(--line-2);
}
.stats__num {
  font-size: 40px; font-weight: 800; color: var(--ink); letter-spacing: -.035em;
  line-height: 1; font-variant-numeric: tabular-nums;
}
.stats__num small { font-size: 15px; font-weight: 700; margin-left: 3px; color: var(--accent); }
.stats__label { font-size: 14px; color: var(--ink-2); margin-top: 10px; }

/* =========================================================
   卡片通用
   ========================================================= */
.grid { display: grid; gap: 28px; }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--1 { grid-template-columns: 1fr; }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; transition: transform .3s cubic-bezier(.2,.7,.3,1), box-shadow .3s, border-color .3s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #cfdcec; }
.card__media { background: var(--bg-soft); aspect-ratio: 4 / 3; overflow: hidden; position: relative; }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.card:hover .card__media img { transform: scale(1.045); }
/* 白底产品图：contain 保留整机全貌 */
.card__media--fit { background: linear-gradient(170deg, #fbfcfe, #eef3f9); }
.card__media--fit img { object-fit: contain; padding: 20px; }
.card:hover .card__media--fit img { transform: scale(1.03); }
.card__body { padding: 24px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.card__body h3 { font-size: 18px; margin-bottom: 10px; letter-spacing: -.02em; }
.card__body p { color: var(--ink-2); font-size: 14.5px; flex: 1; line-height: 1.75; }
.card__spec {
  font-size: 12.5px; color: var(--ink-3); border-top: 1px solid var(--line-2);
  padding-top: 14px; margin-top: 12px; line-height: 1.8;
}
.card__link { color: var(--brand); font-weight: 600; font-size: 14.5px; display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; }
.card__link::after { content: "→"; transition: transform .2s ease; }
.card:hover .card__link { color: var(--accent); }
.card:hover .card__link::after { transform: translateX(4px); }
/* 序号角标（预留，当前未使用） */
.card__no {
  position: absolute; left: 20px; top: 18px; z-index: 2;
  font-size: 12px; font-weight: 800; color: var(--accent);
  letter-spacing: .1em; font-variant-numeric: tabular-nums;
}

/* =========================================================
   解决方案
   ========================================================= */
.sol-card {
  position: relative; overflow: hidden; border-radius: var(--radius-lg); border: 1px solid var(--line);
  background: var(--bg-soft); padding: 30px 28px; transition: all .28s cubic-bezier(.2,.7,.3,1); height: 100%;
}
.sol-card::before {
  content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 0;
  background: var(--accent); transition: height .34s cubic-bezier(.2,.7,.3,1);
}
.sol-card:hover { border-color: #cfdcec; background: #fff; box-shadow: var(--shadow-sm); transform: translateY(-3px); }
.sol-card:hover::before { height: 100%; }
.sol-card h3 { font-size: 17.5px; margin-bottom: 4px; letter-spacing: -.02em; }
.sol-card ul { margin-top: 16px; }
.sol-card li { position: relative; padding-left: 18px; font-size: 14.5px; color: var(--ink-2); margin-bottom: 8px; line-height: 1.7; }
.sol-card li::before {
  content: ""; position: absolute; left: 1px; top: 10px; width: 6px; height: 6px;
  background: var(--accent); border-radius: 1px; transform: rotate(45deg);
}

/* =========================================================
   优势 / 服务特点
   ========================================================= */
.feature { display: flex; gap: 20px; padding: 28px 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; height: 100%; transition: all .28s; }
.feature:hover { border-color: #cfdcec; box-shadow: var(--shadow-sm); }
.feature__ico {
  flex: 0 0 46px; height: 46px; border-radius: var(--radius); background: var(--brand-tint);
  display: flex; align-items: center; justify-content: center; color: var(--brand);
  font-size: 17px; font-weight: 800; font-variant-numeric: tabular-nums;
}
.feature h3 { font-size: 16.5px; margin-bottom: 8px; letter-spacing: -.02em; }
.feature p { font-size: 14.5px; color: var(--ink-2); margin: 0; line-height: 1.75; }

/* =========================================================
   流程
   ========================================================= */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.step { position: relative; text-align: left; padding: 0 6px; }
.step__dot {
  width: 44px; height: 44px; margin: 0 0 18px; border-radius: 50%;
  background: #fff; color: var(--brand); border: 1.5px solid var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; font-variant-numeric: tabular-nums;
  position: relative; z-index: 1;
}
.step::after {
  content: ""; position: absolute; top: 22px; left: 52px; right: -20px;
  height: 1px; background: repeating-linear-gradient(90deg, #d3dbe6 0 5px, transparent 5px 10px); z-index: 0;
}
.step:last-child::after { display: none; }
.step h3 { font-size: 15.5px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--ink-2); margin: 0; line-height: 1.7; }

/* 深色版块里的流程 */
.section--deep .step__dot { background: transparent; color: var(--accent-light); border-color: rgba(255,255,255,.28); }
.section--deep .step::after { background: rgba(255,255,255,.16); }
.section--deep .step h3 { color: #fff; }
.section--deep .step p { color: #9db1c8; }

/* =========================================================
   案例
   ========================================================= */
.case-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; transition: all .3s cubic-bezier(.2,.7,.3,1); }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #cfdcec; }
.case-card__media { aspect-ratio: 3 / 2; background: var(--bg-soft); overflow: hidden; position: relative; }
.case-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.case-card:hover .case-card__media img { transform: scale(1.05); }
.case-card__body { padding: 26px; flex: 1; display: flex; flex-direction: column; }
.case-card__meta { font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.case-card h3 { font-size: 17.5px; margin: 10px 0 10px; letter-spacing: -.02em; }
.case-card p { font-size: 14.5px; color: var(--ink-2); flex: 1; line-height: 1.75; }
.kv { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line-2); }
.kv span { font-size: 12.5px; color: var(--ink-2); font-weight: 600; }
.kv span + span { position: relative; padding-left: 12px; }
.kv span + span::before { content: ""; position: absolute; left: 0; top: 50%; width: 3px; height: 3px; border-radius: 50%; background: var(--line); transform: translateY(-50%); }

/* =========================================================
   面包屑
   ========================================================= */
.breadcrumb { background: #fff; border-bottom: 1px solid var(--line-2); font-size: 13px; color: var(--ink-3); }
.breadcrumb .container { padding-top: 14px; padding-bottom: 14px; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb span { margin: 0 10px; color: var(--line); }

/* =========================================================
   内容页布局
   ========================================================= */
.layout { display: grid; grid-template-columns: 1fr 312px; gap: 48px; align-items: start; }
.page-hero {
  background: linear-gradient(140deg, #f9fbfd 0%, #eef4fa 100%);
  border-bottom: 1px solid var(--line-2); padding: 72px 0 64px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(16,69,127,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(16,69,127,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(120deg, #000, transparent 70%);
  -webkit-mask-image: linear-gradient(120deg, #000, transparent 70%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(26px, 3.4vw, 42px); margin-bottom: 14px; letter-spacing: -.03em; font-weight: 800; }
.page-hero p { color: var(--ink-2); font-size: 16.5px; margin: 0; max-width: 720px; }

/* 产品详情 */
.prod-hero { display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center; }
.prod-gallery { border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; padding: 16px; box-shadow: var(--shadow-sm); }
.prod-gallery__main { aspect-ratio: 4 / 3; background: linear-gradient(170deg, #fbfcfe, #eef3f9); border-radius: var(--radius); overflow: hidden; }
.prod-gallery__main img { width: 100%; height: 100%; object-fit: cover; }
.prod-gallery__main--fit { aspect-ratio: 4 / 5; }
.prod-gallery__main--fit img { object-fit: contain; }
.prod-gallery__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 14px; }
.prod-gallery__thumbs button {
  border: 1px solid var(--line); background: #fff; border-radius: var(--radius); padding: 0; aspect-ratio: 1;
  overflow: hidden; transition: border-color .2s, transform .2s;
}
.prod-gallery__thumbs button img { object-fit: cover; }
.prod-gallery__thumbs button.is-active, .prod-gallery__thumbs button:hover { border-color: var(--brand); }
.prod-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; }
.prod-meta span { background: var(--brand-tint); color: var(--brand); font-size: 13px; padding: 6px 14px; border-radius: 999px; font-weight: 600; }

/* 参数表 */
.spec-table { width: 100%; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: #fff; }
.spec-table th, .spec-table td { padding: 15px 20px; border-bottom: 1px solid var(--line-2); text-align: left; font-size: 14.5px; }
.spec-table thead th { background: var(--brand); color: #fff; font-weight: 600; letter-spacing: .01em; }
.spec-table tbody tr:nth-child(even) { background: var(--bg-soft); }
.spec-table tbody tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { width: 34%; color: var(--ink-2); }

/* 列表打勾 */
.ticks li { position: relative; padding-left: 30px; margin-bottom: 12px; color: var(--ink-2); }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 3px; color: #fff; background: var(--brand);
  width: 18px; height: 18px; border-radius: 50%; font-size: 11px;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}

/* 侧边栏 */
.side-card { border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; padding: 26px; margin-bottom: 22px; }
.side-card h3 { font-size: 16px; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line-2); letter-spacing: -.02em; }
.side-nav a { display: block; padding: 11px 0; border-bottom: 1px solid var(--line-2); font-size: 14.5px; color: var(--ink-2); transition: all .2s; }
.side-nav a:last-child { border-bottom: 0; }
.side-nav a:hover { color: var(--brand); padding-left: 6px; }
.side-nav a.is-active { color: var(--brand); font-weight: 700; }
.side-card .tel { font-size: 24px; font-weight: 800; color: var(--accent); display: block; letter-spacing: -.02em; }
.side-card p { font-size: 14px; color: var(--ink-2); }

/* FAQ */
.faq details { border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; margin-bottom: 12px; padding: 0 24px; transition: all .24s; }
.faq details[open] { border-color: #cfdcec; box-shadow: var(--shadow-sm); }
.faq summary { cursor: pointer; padding: 20px 0; font-weight: 600; font-size: 16px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; letter-spacing: -.01em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 22px; font-weight: 400; flex: 0 0 auto; }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding: 18px 0 20px; color: var(--ink-2); font-size: 15px; border-top: 1px solid var(--line-2); }

/* =========================================================
   表单
   ========================================================= */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.form-group label i { color: var(--accent); font-style: normal; margin-left: 2px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 13px 15px; border: 1px solid #d8e1ec; border-radius: var(--radius); font-size: 15px;
  font-family: inherit; color: var(--ink); background: #fff; transition: border-color .2s, box-shadow .2s;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: #aab4c2; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--brand); box-shadow: 0 0 0 3px rgba(16,69,127,.10); outline: none;
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 13px; color: var(--ink-3); }
.form-tip { display: none; margin-top: 16px; padding: 15px 18px; border-radius: var(--radius); font-size: 14.5px; }
.form-tip.is-show { display: block; }
.form-tip--ok { background: #edf8f1; border: 1px solid #bde3ca; color: #1a6f38; }
.form-tip--err { background: #fdeded; border: 1px solid #f3c9c9; color: #a8231c; }
.err-msg { color: #a8231c; font-size: 12.5px; margin-top: 6px; display: none; }
.has-error input, .has-error textarea { border-color: #a8231c; }
.has-error .err-msg { display: block; }

/* 联系信息块 */
.contact-box { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.contact-item { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; background: #fff; transition: all .26s; }
.contact-item:hover { border-color: #cfdcec; box-shadow: var(--shadow-sm); }
.contact-item dt { font-size: 13px; color: var(--ink-3); margin-bottom: 8px; }
.contact-item dd { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -.01em; }

/* =========================================================
   CTA 条
   ========================================================= */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, #07111c, #0b2744 55%, #10457f);
  color: #fff; padding: 84px 0; text-align: center;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; opacity: .09;
  background-image: linear-gradient(rgba(255,255,255,.7) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.7) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(700px 400px at 50% 50%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(700px 400px at 50% 50%, #000, transparent 75%);
}
.cta-band .container { position: relative; z-index: 1; }
.cta-band h2 { font-size: clamp(24px, 3vw, 36px); color: #fff; letter-spacing: -.028em; font-weight: 800; }
.cta-band p { color: #b7cbe1; max-width: 760px; margin: 0 auto 30px; font-size: 16.5px; }

/* =========================================================
   页脚
   ========================================================= */
.site-footer { background: var(--bg-deep); color: #93a5ba; padding: 76px 0 0; font-size: 14.5px; }
/* 深色底上把深色 logo 反白，否则几乎看不见 */
.site-footer img[src*="logo"] { filter: brightness(0) invert(1); opacity: .9; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 52px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 20px; letter-spacing: .01em; }
.site-footer a { color: #93a5ba; transition: color .2s; }
.site-footer a:hover { color: #fff; }
.site-footer li { margin-bottom: 11px; }
.site-footer p { color: #7f92a8; line-height: 1.8; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0; font-size: 13px; color: #6b7d93; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom a:hover { color: #fff; }

/* =========================================================
   移动端浮动工具条 & 回到顶部
   ========================================================= */
.fab-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 70; display: none;
  background: rgba(255,255,255,.96); backdrop-filter: blur(10px);
  border-top: 1px solid var(--line-2); box-shadow: 0 -6px 20px rgba(9,20,32,.08);
}
.fab-bar a { flex: 1; padding: 12px 4px; text-align: center; font-size: 12.5px; color: var(--ink-3); border-right: 1px solid var(--line-2); }
.fab-bar a:last-child { border-right: 0; }
.fab-bar a b { display: block; font-size: 14.5px; color: var(--ink); font-weight: 700; }
.fab-bar a:nth-child(3) { background: var(--brand); }
.fab-bar a:nth-child(3) b { color: #fff; }
.fab-bar a:nth-child(3) { color: rgba(255,255,255,.75); }
.to-top {
  position: fixed; right: 22px; bottom: 86px; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; color: var(--brand); box-shadow: var(--shadow);
  display: none; align-items: center; justify-content: center; font-size: 18px; z-index: 65;
  transition: all .2s;
}
.to-top:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
.to-top.is-show { display: flex; }

/* =========================================================
   图片带 / 场景 / 照片墙
   ========================================================= */
.photo-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.photo-band figure { position: relative; margin: 0; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4 / 3; background: var(--bg-deep-2); }
.photo-band img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.photo-band figure:hover img { transform: scale(1.05); }
.photo-band figcaption {
  position: absolute; inset: auto 0 0 0; padding: 42px 18px 16px;
  background: linear-gradient(180deg, transparent, rgba(7,17,28,.86));
  color: #fff; font-size: 13.5px; font-weight: 600; line-height: 1.5;
}

/* 实拍图卡 */
.shot {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-xs);
  transition: transform .3s cubic-bezier(.2,.7,.3,1), box-shadow .3s; height: 100%; display: flex; flex-direction: column;
}
.shot:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.shot__media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-soft); }
.shot__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.shot:hover .shot__media img { transform: scale(1.05); }
.shot__body { padding: 18px 20px 22px; flex: 1; }
.shot__body h3 { font-size: 16px; margin-bottom: 6px; }
.shot__body p { font-size: 14px; color: var(--ink-2); margin: 0; }
.shot__tag {
  position: absolute; left: 14px; top: 14px; z-index: 2;
  background: rgba(255,255,255,.95); color: var(--brand); font-size: 12px; font-weight: 700;
  padding: 5px 12px; border-radius: 999px; letter-spacing: .04em; box-shadow: var(--shadow-xs);
}

/* 应用场景：一主三辅 */
.scene-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 18px; }
.scene-grid__side { display: grid; grid-template-rows: repeat(3, 1fr); gap: 18px; }
.scene-item { position: relative; border-radius: var(--radius-lg); overflow: hidden; margin: 0; background: var(--bg-deep-2); }
.scene-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.scene-item:hover img { transform: scale(1.05); }
.scene-item figcaption {
  position: absolute; inset: auto 0 0 0; padding: 52px 22px 20px;
  background: linear-gradient(180deg, transparent, rgba(7,17,28,.9)); color: #fff;
}
.scene-item figcaption b { display: block; font-size: 17px; margin-bottom: 3px; }
.scene-item figcaption span { font-size: 13px; color: #a9bed6; }
.scene-item--main { min-height: 400px; }
.scene-grid__side .scene-item { min-height: 122px; }

/* 照片墙 */
.wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.wall figure { position: relative; margin: 0; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 3 / 2; background: var(--bg-deep-2); }
.wall img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.wall figure:hover img { transform: scale(1.05); }
.wall figcaption {
  position: absolute; inset: auto 0 0 0; padding: 40px 18px 16px;
  background: linear-gradient(180deg, transparent, rgba(7,17,28,.86));
  color: #fff; font-size: 13.5px; font-weight: 600;
}

/* =========================================================
   左文右图 / 右文左图 分栏版块
   ========================================================= */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 68px; align-items: center; }
.split--media-right .split__media { order: 2; }
.split__body h2 { font-size: clamp(24px, 2.9vw, 34px); letter-spacing: -.028em; font-weight: 800; }
.split__media { position: relative; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 3 / 2; background: var(--bg-soft); }
.split__media img { width: 100%; height: 100%; object-fit: cover; }
.split__list { margin-top: 24px; }
.split__list li { position: relative; padding-left: 26px; margin-bottom: 14px; color: var(--ink-2); font-size: 15px; }
.split__list li::before {
  content: ""; position: absolute; left: 0; top: 9px; width: 14px; height: 1px; background: var(--accent);
}
.split__list li b { color: var(--ink); font-weight: 700; }
/* 深色版块内的分栏文字 */
.section--deep .split__body h2 { color: #fff; }
.section--deep .split__body p { color: #a9bed6; }
.section--deep .split__list li { color: #a9bed6; }
.section--deep .split__list li b { color: #fff; }

/* =========================================================
   深色沉浸版块
   ========================================================= */
.section--deep {
  position: relative; color: #fff;
  background:
    radial-gradient(900px 400px at 10% -10%, rgba(200,114,30,.16), transparent 60%),
    linear-gradient(160deg, #07111c 0%, #0b2744 100%);
}
.section--deep::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .07;
  background-image: linear-gradient(rgba(255,255,255,.6) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.6) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, #000, transparent 80%);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 80%);
}
.section--deep .container { position: relative; z-index: 1; }
.section--deep .section-head h2 { color: #fff; }
.section--deep .section-head h2 span { color: var(--accent-light); }
.section--deep .section-head p { color: #a9bed6; }
.section--deep .eyebrow { color: var(--accent-light); }
.wall--deep figure { outline: 1px solid rgba(255,255,255,.1); outline-offset: -1px; }
.wall--deep figure figcaption { background: linear-gradient(180deg, transparent, rgba(3,10,18,.92)); }
/* 深色版块里的文字链接/按钮 */
.section--deep .link-arrow { color: var(--accent-light); }

/* =========================================================
   入场动画（仅 JS 就绪时启用，避免整块版块不可见）
   ========================================================= */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   404
   ========================================================= */
.e404 { padding: 130px 0 150px; text-align: center; }
.e404__code { font-size: clamp(80px, 16vw, 168px); font-weight: 800; letter-spacing: -.05em; line-height: 1; color: var(--brand); }
.e404 p { color: var(--ink-2); font-size: 17px; }
.e404__links { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 28px; }
.e404__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; max-width: 800px; margin-left: auto; margin-right: auto; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1120px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 32px 20px; }
  .step:nth-child(3)::after { display: none; }
  .layout { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__item { padding: 34px 24px 34px 0; }
  .stats__item:nth-child(3) { padding-left: 0; }
  .stats__item:nth-child(3)::before { display: none; }
  .stats__item:nth-child(4) { padding-left: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .split { gap: 44px; }
}

@media (max-width: 900px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 76px 0 68px; }
  .hero__grid, .prod-hero, .split { grid-template-columns: 1fr; gap: 40px; }
  .split--media-right .split__media { order: 0; }
  .grid--3 { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 40px; }
  .fab-bar { display: flex; }
  body { padding-bottom: 62px; }
  .to-top { bottom: 80px; right: 16px; }
  .photo-band { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: 1fr; }
  .scene-grid__side { grid-template-rows: none; grid-template-columns: repeat(3, 1fr); }
  .scene-item--main { min-height: 280px; }
  .scene-grid__side .scene-item { min-height: 118px; }
  .wall { grid-template-columns: repeat(2, 1fr); }
  .head-row { flex-direction: column; align-items: flex-start; gap: 20px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  /* 窄屏只留电话，省掉营业时间那一行，头部不啰嗦 */
  .topbar .container > div:last-child { display: none; }
  .topbar .container { justify-content: flex-start; }
  .grid--4, .grid--2, .contact-box, .form-row, .e404__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step::after { display: none; }
  .topbar .container { justify-content: center; }
  .topbar .sp + .sp { margin-left: 14px; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stats__item, .stats__item:nth-child(4) { padding: 26px 16px 26px 0; }
  .stats__item + .stats__item { padding-left: 20px; }
  .stats__num { font-size: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .prod-gallery__thumbs { grid-template-columns: repeat(4, 1fr); }
  .hero__actions .btn { width: 100%; }
  .hero__tags span { padding: 0 10px; font-size: 12.5px; }
  .cta-band { padding: 62px 0; }
  .section { padding: 60px 0; }
  .photo-band { gap: 12px; }
  .scene-grid__side { grid-template-columns: 1fr; }
  .wall { grid-template-columns: 1fr; }
  .grid { gap: 20px; }
}